Merge branch 'new-context' into remap-coarse

# Conflicts:
#	amgprec/amg_c_prec_type.f90
#	amgprec/amg_d_prec_type.f90
#	amgprec/amg_s_prec_type.f90
#	amgprec/amg_z_prec_type.f90

amgprec/Makefile

@@ -13,7 +13,9 @@ DMODOBJS=amg_d_prec_type.o \
 	amg_d_base_solver_mod.o amg_d_base_smoother_mod.o amg_d_onelev_mod.o \
 	amg_d_gs_solver.o amg_d_mumps_solver.o \
 	amg_d_base_aggregator_mod.o \
-	amg_d_dec_aggregator_mod.o amg_d_symdec_aggregator_mod.o
+	amg_d_dec_aggregator_mod.o amg_d_symdec_aggregator_mod.o \
+	amg_d_ainv_solver.o amg_d_base_ainv_mod.o \
+	amg_d_invk_solver.o amg_d_invt_solver.o
 #amg_d_bcmatch_aggregator_mod.o
 
 SMODOBJS=amg_s_prec_type.o amg_s_ilu_fact_mod.o \
@@ -22,7 +24,9 @@ SMODOBJS=amg_s_prec_type.o amg_s_ilu_fact_mod.o \
 	amg_s_base_solver_mod.o amg_s_base_smoother_mod.o amg_s_onelev_mod.o  \
 	amg_s_gs_solver.o amg_s_mumps_solver.o \
 	amg_s_base_aggregator_mod.o  \
-	amg_s_dec_aggregator_mod.o amg_s_symdec_aggregator_mod.o
+	amg_s_dec_aggregator_mod.o amg_s_symdec_aggregator_mod.o \
+	amg_s_ainv_solver.o amg_s_base_ainv_mod.o \
+	amg_s_invk_solver.o amg_s_invt_solver.o
 
 ZMODOBJS=amg_z_prec_type.o amg_z_ilu_fact_mod.o \
 	amg_z_inner_mod.o amg_z_ilu_solver.o amg_z_diag_solver.o amg_z_jac_smoother.o amg_z_as_smoother.o \
@@ -30,7 +34,9 @@ ZMODOBJS=amg_z_prec_type.o amg_z_ilu_fact_mod.o \
 	amg_z_base_solver_mod.o amg_z_base_smoother_mod.o amg_z_onelev_mod.o \
 	amg_z_gs_solver.o amg_z_mumps_solver.o \
 	amg_z_base_aggregator_mod.o  \
-	amg_z_dec_aggregator_mod.o amg_z_symdec_aggregator_mod.o
+	amg_z_dec_aggregator_mod.o amg_z_symdec_aggregator_mod.o \
+	amg_z_ainv_solver.o amg_z_base_ainv_mod.o \
+	amg_z_invk_solver.o amg_z_invt_solver.o
 
 CMODOBJS=amg_c_prec_type.o amg_c_ilu_fact_mod.o \
 	amg_c_inner_mod.o amg_c_ilu_solver.o amg_c_diag_solver.o amg_c_jac_smoother.o amg_c_as_smoother.o \
@@ -38,16 +44,19 @@ CMODOBJS=amg_c_prec_type.o amg_c_ilu_fact_mod.o \
 	amg_c_base_solver_mod.o amg_c_base_smoother_mod.o amg_c_onelev_mod.o  \
 	amg_c_gs_solver.o amg_c_mumps_solver.o \
 	amg_c_base_aggregator_mod.o  \
-	amg_c_dec_aggregator_mod.o amg_c_symdec_aggregator_mod.o
+	amg_c_dec_aggregator_mod.o amg_c_symdec_aggregator_mod.o \
+	amg_c_ainv_solver.o amg_c_base_ainv_mod.o \
+	amg_c_invk_solver.o amg_c_invt_solver.o
 
 
 
 MODOBJS=amg_base_prec_type.o amg_prec_type.o  amg_prec_mod.o \
 	 amg_s_prec_mod.o  amg_d_prec_mod.o amg_c_prec_mod.o amg_z_prec_mod.o \
-	$(SMODOBJS) $(DMODOBJS) $(CMODOBJS) $(ZMODOBJS) 
+	 amg_base_ainv_mod.o amg_ainv_mod.o\
+	$(SMODOBJS) $(DMODOBJS) $(CMODOBJS) $(ZMODOBJS)
 
 
-OBJS=$(MODOBJS) 
+OBJS=$(MODOBJS)
 
 LOCAL_MODS=$(MODOBJS:.o=$(.mod))
 LIBNAME=libamg_prec.a
@@ -67,9 +76,9 @@ lib: $(OBJS) impld
 
 $(MODOBJS): $(PSBLAS_MODDIR)/$(BASEMODNAME)$(.mod)
 
-amg_base_prec_type.o: amg_const.h 
+amg_base_prec_type.o: amg_const.h
 amg_s_prec_type.o amg_d_prec_type.o amg_c_prec_type.o amg_z_prec_type.o	: amg_base_prec_type.o
-amg_prec_type.o: amg_s_prec_type.o amg_d_prec_type.o amg_c_prec_type.o amg_z_prec_type.o	
+amg_prec_type.o: amg_s_prec_type.o amg_d_prec_type.o amg_c_prec_type.o amg_z_prec_type.o
 amg_prec_mod.o: amg_prec_type.o amg_s_prec_mod.o amg_d_prec_mod.o amg_c_prec_mod.o amg_z_prec_mod.o
 
 $(SINNEROBJS) $(SOUTEROBJS): $(SMODOBJS)
@@ -82,10 +91,10 @@ amg_d_inner_mod.o: amg_d_prec_type.o
 amg_c_inner_mod.o: amg_c_prec_type.o
 amg_z_inner_mod.o: amg_z_prec_type.o
 
-amg_s_prec_mod.o: $(SMODOBJS) 
-amg_d_prec_mod.o: $(DMODOBJS) 
-amg_c_prec_mod.o: $(CMODOBJS) 
-amg_z_prec_mod.o: $(ZMODOBJS) 
+amg_s_prec_mod.o: $(SMODOBJS)
+amg_d_prec_mod.o: $(DMODOBJS)
+amg_c_prec_mod.o: $(CMODOBJS)
+amg_z_prec_mod.o: $(ZMODOBJS)
 
 
 amg_s_prec_type.o: amg_s_onelev_mod.o
@@ -119,6 +128,14 @@ amg_d_base_smoother_mod.o: amg_d_base_solver_mod.o
 amg_c_base_smoother_mod.o: amg_c_base_solver_mod.o
 amg_z_base_smoother_mod.o: amg_z_base_solver_mod.o
 
+amg_s_ainv_solver.o: amg_s_base_ainv_mod.o
+amg_c_ainv_solver.o: amg_c_base_ainv_mod.o
+amg_d_ainv_solver.o: amg_d_base_ainv_mod.o
+amg_z_ainv_solver.o: amg_z_base_ainv_mod.o
+amg_s_base_ainv_mod.o: amg_s_base_solver_mod.o amg_base_ainv_mod.o
+amg_c_base_ainv_mod.o: amg_c_base_solver_mod.o amg_base_ainv_mod.o
+amg_d_base_ainv_mod.o: amg_d_base_solver_mod.o amg_base_ainv_mod.o
+amg_z_base_ainv_mod.o: amg_z_base_solver_mod.o amg_base_ainv_mod.o
 
 amg_s_base_solver_mod.o amg_d_base_solver_mod.o amg_c_base_solver_mod.o amg_z_base_solver_mod.o: amg_base_prec_type.o
 
@@ -141,11 +158,11 @@ amg_s_as_smoother.o amg_s_jac_smoother.o: amg_s_base_smoother_mod.o
 amg_s_jac_smoother.o: amg_s_diag_solver.o
 amg_sprecinit.o amg_sprecset.o: amg_s_diag_solver.o amg_s_ilu_solver.o \
 		amg_s_as_smoother.o amg_s_jac_smoother.o \
-	        amg_s_id_solver.o amg_s_slu_solver.o 
+	        amg_s_id_solver.o amg_s_slu_solver.o
 
 amg_z_mumps_solver.o amg_z_gs_solver.o amg_z_id_solver.o amg_z_sludist_solver.o amg_z_slu_solver.o \
 amg_z_umf_solver.o amg_z_diag_solver.o amg_z_ilu_solver.o: amg_z_base_solver_mod.o  amg_z_prec_type.o
-amg_z_ilu_fact_mod.o: amg_base_prec_type.o  amg_z_base_solver_mod.o	
+amg_z_ilu_fact_mod.o: amg_base_prec_type.o  amg_z_base_solver_mod.o
 amg_z_ilu_solver.o amg_z_iluk_fact.o: amg_z_ilu_fact_mod.o
 amg_z_as_smoother.o amg_z_jac_smoother.o: amg_z_base_smoother_mod.o
 amg_z_jac_smoother.o: amg_z_diag_solver.o
@@ -163,7 +180,24 @@ amg_cprecinit.o amg_cprecset.o: amg_c_diag_solver.o amg_c_ilu_solver.o \
 		amg_c_as_smoother.o amg_c_jac_smoother.o \
 	        amg_c_id_solver.o amg_c_slu_solver.o amg_c_sludist_solver.o
 
-
+amg_base_ainv_mod.o: amg_base_prec_type.o
+amg_s_base_ainv_mod.o amg_d_base_ainv_mod.o amg_c_base_ainv_mod.o amg_z_base_ainv_mod.o: amg_base_ainv_mod.o
+amg_s_ainv_solver.o: amg_base_ainv_mod.o amg_s_base_ainv_mod.o
+amg_d_ainv_solver.o: amg_base_ainv_mod.o amg_d_base_ainv_mod.o
+amg_c_ainv_solver.o: amg_base_ainv_mod.o amg_c_base_ainv_mod.o
+amg_z_ainv_solver.o: amg_base_ainv_mod.o amg_z_base_ainv_mod.o
+amg_s_invk_solver.o: amg_base_ainv_mod.o amg_s_base_ainv_mod.o
+amg_d_invk_solver.o: amg_base_ainv_mod.o amg_d_base_ainv_mod.o
+amg_c_invk_solver.o: amg_base_ainv_mod.o amg_c_base_ainv_mod.o
+amg_z_invk_solver.o: amg_base_ainv_mod.o amg_z_base_ainv_mod.o
+amg_s_invt_solver.o: amg_base_ainv_mod.o amg_s_base_ainv_mod.o
+amg_d_invt_solver.o: amg_base_ainv_mod.o amg_d_base_ainv_mod.o
+amg_c_invt_solver.o: amg_base_ainv_mod.o amg_c_base_ainv_mod.o
+amg_z_invt_solver.o: amg_base_ainv_mod.o amg_z_base_ainv_mod.o
+amg_ainv_mod.o: amg_s_ainv_solver.o amg_d_ainv_solver.o amg_c_ainv_solver.o \
+	amg_z_ainv_solver.o amg_s_invk_solver.o amg_d_invk_solver.o amg_c_invk_solver.o \
+	amg_z_invk_solver.o amg_s_invt_solver.o amg_d_invt_solver.o amg_c_invt_solver.o \
+	amg_z_invt_solver.o
 
 veryclean: clean
 	/bin/rm -f $(LIBNAME)

amgprec/amg_ainv_mod.f90

@@ -0,0 +1,49 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+module amg_ainv_mod
+  use amg_d_ainv_solver
+  use amg_d_invk_solver
+  use amg_d_invt_solver
+  use amg_s_ainv_solver
+  use amg_s_invk_solver
+  use amg_s_invt_solver
+  use amg_c_ainv_solver
+  use amg_c_invk_solver
+  use amg_c_invt_solver
+  use amg_c_ainv_solver
+  use amg_c_invk_solver
+  use amg_c_invt_solver
+end module amg_ainv_mod

amgprec/amg_base_ainv_mod.F90

@@ -0,0 +1,64 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+module amg_base_ainv_mod
+
+  use amg_base_prec_type
+  use psb_prec_const_mod, only : psb_inv_fillin_, psb_inv_thresh_
+
+  integer, parameter   :: amg_inv_fillin_ = psb_inv_fillin_
+  integer, parameter   :: amg_ainv_alg_   = amg_inv_fillin_ + 1
+  integer, parameter   :: amg_inv_thresh_ = psb_inv_thresh_
+#if 0
+  integer, parameter   :: amg_ainv_orth1_ = amg_inv_thresh_ + 1
+  integer, parameter   :: amg_ainv_orth2_ = amg_ainv_orth1_ + 1
+  integer, parameter   :: amg_ainv_orth3_ = amg_ainv_orth2_ + 1
+  integer, parameter   :: amg_ainv_orth4_ = amg_ainv_orth3_ + 1
+  integer, parameter   :: amg_ainv_llk_   = amg_ainv_orth4_ + 1
+#else
+  integer, parameter   :: amg_ainv_llk_   = amg_inv_thresh_ + 1
+#endif
+  integer, parameter   :: amg_ainv_s_llk_ = amg_ainv_llk_ + 1
+  integer, parameter   :: amg_ainv_s_ft_llk_ = amg_ainv_s_llk_ + 1
+  integer, parameter   :: amg_ainv_llk_noth_ = amg_ainv_s_ft_llk_  + 1
+  integer, parameter   :: amg_ainv_mlk_      = amg_ainv_llk_noth_  + 1
+  integer, parameter   :: amg_ainv_lmx_      = amg_ainv_mlk_
+#if defined(HAVE_TUMA_SAINV)
+  integer, parameter   :: amg_ainv_s_tuma_    = amg_ainv_lmx_  + 1
+  integer, parameter   :: amg_ainv_l_tuma_    = amg_ainv_s_tuma_  + 1
+#endif
+
+
+end module amg_base_ainv_mod

amgprec/amg_c_ainv_solver.F90

@@ -0,0 +1,321 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+!
+!
+!
+!
+module amg_c_ainv_solver
+
+  use amg_c_base_ainv_mod
+  use psb_base_mod, only : psb_d_vect_type
+
+  type, extends(amg_c_base_ainv_solver_type) :: amg_c_ainv_solver_type
+    !
+    !  Compute an approximate factorization
+    !      A^-1 = Z D^-1 W^T
+    !  Note that here W is going to be transposed explicitly,
+    !  so that the component w will in the end contain W^T.
+    !
+    integer(psb_ipk_)   :: alg, fill_in
+    real(psb_spk_)      :: thresh
+  contains
+    procedure, pass(sv) :: check   => amg_c_ainv_solver_check
+    procedure, pass(sv) :: build   => amg_c_ainv_solver_bld
+    procedure, pass(sv) :: clone   => amg_c_ainv_solver_clone
+    procedure, pass(sv) :: cseti   => amg_c_ainv_solver_cseti
+    procedure, pass(sv) :: csetc   => amg_c_ainv_solver_csetc
+    procedure, pass(sv) :: csetr   => amg_c_ainv_solver_csetr
+    procedure, pass(sv) :: seti    => amg_c_ainv_solver_seti
+    procedure, pass(sv) :: setc    => amg_c_ainv_solver_setc
+    procedure, pass(sv) :: setr    => amg_c_ainv_solver_setr
+    generic, public :: set => seti, setr, setc
+    procedure, pass(sv) :: descr   => amg_c_ainv_solver_descr
+    procedure, pass(sv) :: default => c_ainv_solver_default
+    procedure, nopass   :: stringval  => c_ainv_stringval
+    procedure, nopass   :: algname => c_ainv_algname
+  end type amg_c_ainv_solver_type
+
+
+  private :: c_ainv_stringval, c_ainv_solver_default, &
+       &  c_ainv_algname
+
+  interface
+    subroutine amg_c_ainv_solver_clone(sv,svout,info)
+      import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat, &
+       & amg_c_base_solver_type, psb_dpk_, amg_c_ainv_solver_type, psb_ipk_
+      Implicit None
+      class(amg_c_ainv_solver_type), intent(inout)              :: sv
+      class(amg_c_base_solver_type), allocatable, intent(inout) :: svout
+      integer(psb_ipk_), intent(out)                            :: info
+    end subroutine amg_c_ainv_solver_clone
+  end interface
+
+
+  interface
+    subroutine amg_c_ainv_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat, &
+       & psb_d_vect_type, psb_c_base_vect_type, psb_dpk_,&
+       & amg_c_ainv_solver_type, psb_i_base_vect_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      type(psb_cspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a
+      class(amg_c_ainv_solver_type), intent(inout)        :: sv
+      integer(psb_ipk_), intent(out)                      :: info
+      type(psb_cspmat_type), intent(in), target, optional :: b
+      class(psb_c_base_sparse_mat), intent(in), optional  :: amold
+      class(psb_c_base_vect_type), intent(in), optional   :: vmold
+      class(psb_i_base_vect_type), intent(in), optional   :: imold
+    end subroutine amg_c_ainv_solver_bld
+  end interface
+
+  interface
+    subroutine amg_c_ainv_solver_check(sv,info)
+      import :: psb_dpk_, amg_c_ainv_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_c_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_c_ainv_solver_check
+  end interface
+
+  interface
+    subroutine amg_c_ainv_solver_cseti(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat, psb_ipk_,&
+           & psb_d_vect_type, psb_c_base_vect_type, psb_dpk_, amg_c_ainv_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_c_ainv_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_c_ainv_solver_cseti
+  end interface
+
+
+  interface
+    subroutine amg_c_ainv_solver_csetc(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat, psb_ipk_,&
+           & psb_d_vect_type, psb_c_base_vect_type, psb_dpk_, amg_c_ainv_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_c_ainv_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      character(len=*), intent(in)                 :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_c_ainv_solver_csetc
+  end interface
+
+  interface
+    subroutine amg_c_ainv_solver_csetr(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat,  psb_ipk_,&
+           & psb_d_vect_type, psb_c_base_vect_type, psb_spk_, amg_c_ainv_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_c_ainv_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      real(psb_spk_), intent(in)                   :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_c_ainv_solver_csetr
+  end interface
+
+  interface
+    subroutine amg_c_ainv_solver_setc(sv,what,val,info)
+      import :: amg_c_ainv_solver_type, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_c_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      character(len=*), intent(in)                 :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_c_ainv_solver_setc
+  end interface
+
+  interface
+    subroutine amg_c_ainv_solver_seti(sv,what,val,info)
+      import :: amg_c_ainv_solver_type, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_c_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_c_ainv_solver_seti
+  end interface
+
+  interface
+    subroutine amg_c_ainv_solver_setr(sv,what,val,info)
+      import :: amg_c_ainv_solver_type, psb_ipk_, psb_spk_
+      Implicit none
+      ! Arguments
+      class(amg_c_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      real(psb_spk_), intent(in)                   :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_c_ainv_solver_setr
+  end interface
+
+  interface
+    subroutine amg_c_ainv_solver_descr(sv,info,iout,coarse)
+      import :: psb_dpk_, amg_c_ainv_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_c_ainv_solver_type), intent(in) :: sv
+      integer(psb_ipk_), intent(out)            :: info
+      integer(psb_ipk_), intent(in), optional   :: iout
+      logical, intent(in), optional             :: coarse
+
+    end subroutine amg_c_ainv_solver_descr
+  end interface
+
+  interface  amg_ainv_bld
+    subroutine amg_c_ainv_bld(a,alg,fillin,thresh,wmat,d,zmat,desc,info,blck,iscale)
+      import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat, &
+           & psb_d_vect_type, psb_c_base_vect_type, psb_spk_, psb_ipk_
+      implicit none
+      type(psb_cspmat_type), intent(in), target   :: a
+      integer(psb_ipk_), intent(in)               :: fillin,alg
+      real(psb_spk_), intent(in)                  :: thresh
+      type(psb_cspmat_type), intent(inout)        :: wmat, zmat
+      complex(psb_spk_), allocatable                 :: d(:)
+      Type(psb_desc_type), Intent(inout)          :: desc
+      integer(psb_ipk_), intent(out)              :: info
+      type(psb_cspmat_type), intent(in), optional :: blck
+      integer(psb_ipk_), intent(in), optional     :: iscale
+    end subroutine amg_c_ainv_bld
+  end interface
+
+
+contains
+
+  subroutine c_ainv_solver_default(sv)
+
+    use psb_base_mod
+
+    Implicit None
+
+    ! Arguments
+    class(amg_c_ainv_solver_type), intent(inout) :: sv
+
+    sv%alg     = amg_ainv_llk_
+    sv%fill_in = 0
+    sv%thresh  = dzero
+
+    return
+  end subroutine c_ainv_solver_default
+
+  function is_positive_nz_min(ip) result(res)
+    implicit none
+    integer(psb_ipk_), intent(in) :: ip
+    logical             :: res
+
+    res = (ip >= 1)
+    return
+  end function is_positive_nz_min
+
+
+  function c_ainv_stringval(string) result(val)
+    use psb_base_mod, only : psb_ipk_,psb_toupper
+    implicit none
+  ! Arguments
+    character(len=*), intent(in) :: string
+    integer(psb_ipk_) :: val
+    character(len=*), parameter :: name='d_ainv_stringval'
+
+    select case(psb_toupper(trim(string)))
+    case('LLK')
+      val = amg_ainv_llk_
+    case('STAB-LLK')
+      val = amg_ainv_s_ft_llk_
+    case('SYM-LLK')
+      val = amg_ainv_s_llk_
+    case('MLK')
+      val = amg_ainv_mlk_
+#if defined(HAVE_TUMA_SAINV)
+    case('SAINV-TUMA')
+      val = amg_ainv_s_tuma_
+    case('LAINV-TUMA')
+      val = amg_ainv_l_tuma_
+#endif
+    case default
+      val  = amg_stringval(string)
+    end select
+  end function c_ainv_stringval
+
+
+  function c_ainv_algname(ialg) result(val)
+    integer(psb_ipk_), intent(in) :: ialg
+    character(len=40) :: val
+
+    character(len=*), parameter :: mlkname   = 'Left-looking, list merge '
+    character(len=*), parameter :: llkname   = 'Left-looking '
+    character(len=*), parameter :: stabllkname  = 'Stabilized Left-looking '
+    character(len=*), parameter :: sllkname  = 'Symmetric Left-looking '
+    character(len=*), parameter :: sainvname = 'SAINV (Benzi & Tuma) '
+    character(len=*), parameter :: lainvname = 'LAINV (Benzi & Tuma) '
+    character(len=*), parameter :: defname   = 'Unknown alg variant '
+
+    select case (ialg)
+    case(amg_ainv_mlk_)
+      val = mlkname
+    case(amg_ainv_llk_)
+      val = llkname
+    case(amg_ainv_s_llk_)
+      val = sllkname
+    case(amg_ainv_s_ft_llk_)
+      val = stabllkname
+#if defined(HAVE_TUMA_SAINV)
+    case(amg_ainv_s_tuma_ )
+      val = sainvname
+    case(amg_ainv_l_tuma_ )
+      val = lainvname
+#endif
+    case default
+      val = defname
+    end select
+
+  end function c_ainv_algname
+
+end module amg_c_ainv_solver

amgprec/amg_c_base_ainv_mod.f90

@@ -0,0 +1,199 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+module amg_c_base_ainv_mod
+
+  use amg_base_ainv_mod
+  use amg_c_base_solver_mod
+  use psb_c_ainv_tools_mod
+  use psb_base_mod, only : psb_c_vect_type, psb_spk_, psb_epk_
+
+
+
+  type, extends(amg_c_base_solver_type) :: amg_c_base_ainv_solver_type
+    !
+    !  Compute an approximate factorization
+    !      A^-1 = Z D^-1 W^T
+    !  Note that here W is going to be transposed explicitly,
+    !  so that the component w will in the end contain W^T.
+    !
+    type(psb_cspmat_type)       :: w, z
+    type(psb_c_vect_type)       :: dv
+    complex(psb_spk_), allocatable :: d(:)
+
+  contains
+    procedure, pass(sv) :: cnv     => amg_c_base_ainv_solver_cnv
+    procedure, pass(sv) :: dump    => amg_c_base_ainv_solver_dmp
+    procedure, pass(sv) :: apply_v => amg_c_base_ainv_solver_apply_vect
+    procedure, pass(sv) :: apply_a => amg_c_base_ainv_solver_apply
+    procedure, pass(sv) :: free    => amg_c_base_ainv_solver_free
+    procedure, pass(sv) :: sizeof  => c_base_ainv_solver_sizeof
+    procedure, pass(sv) :: get_nzeros => c_base_ainv_get_nzeros
+    procedure, nopass   :: get_wrksz => c_base_ainv_get_wrksize
+    procedure, pass(sv) :: update_a => amg_c_base_ainv_update_a
+    generic, public     :: update => update_a
+  end type amg_c_base_ainv_solver_type
+
+  private ::  c_base_ainv_solver_sizeof, &
+       & c_base_ainv_get_nzeros, c_base_ainv_get_wrksize
+
+
+  interface
+    subroutine amg_c_base_ainv_solver_cnv(sv,info,amold,vmold,imold)
+      import :: psb_c_base_sparse_mat, psb_c_base_vect_type, psb_spk_, &
+       & amg_c_base_ainv_solver_type, psb_ipk_, psb_i_base_vect_type
+      Implicit None
+      ! Arguments
+      class(amg_c_base_ainv_solver_type), intent(inout)  :: sv
+      integer(psb_ipk_), intent(out)                     :: info
+      class(psb_c_base_sparse_mat), intent(in), optional :: amold
+      class(psb_c_base_vect_type), intent(in), optional  :: vmold
+      class(psb_i_base_vect_type), intent(in), optional  :: imold
+    end subroutine amg_c_base_ainv_solver_cnv
+  end interface
+
+  interface
+    subroutine amg_c_base_ainv_update_a(sv,x,desc_data,info)
+      import :: psb_desc_type, psb_spk_,amg_c_base_ainv_solver_type, psb_c_vect_type, psb_ipk_
+      type(psb_desc_type), intent(in)      :: desc_data
+      class(amg_c_base_ainv_solver_type), intent(inout) :: sv
+      complex(psb_spk_),intent(in)            :: x(:)
+      integer(psb_ipk_), intent(out)       :: info
+    end subroutine amg_c_base_ainv_update_a
+  end interface
+
+  interface
+    subroutine amg_c_base_ainv_solver_apply(alpha,sv,x,beta,y,desc_data,&
+         & trans,work,info,init,initu)
+      import :: psb_desc_type, psb_spk_,amg_c_base_ainv_solver_type, psb_ipk_
+      type(psb_desc_type), intent(in)      :: desc_data
+      class(amg_c_base_ainv_solver_type), intent(inout) :: sv
+      complex(psb_spk_),intent(inout)         :: x(:)
+      complex(psb_spk_),intent(inout)         :: y(:)
+      complex(psb_spk_),intent(in)            :: alpha,beta
+      character(len=1),intent(in)          :: trans
+      complex(psb_spk_),target, intent(inout) :: work(:)
+      integer(psb_ipk_), intent(out)       :: info
+      character, intent(in), optional      :: init
+      complex(psb_spk_),intent(inout), optional :: initu(:)
+    end subroutine amg_c_base_ainv_solver_apply
+  end interface
+
+  interface
+    subroutine amg_c_base_ainv_solver_apply_vect(alpha,sv,x,beta,y,desc_data,&
+         &  trans,work,wv,info,init,initu)
+      import :: psb_desc_type, psb_spk_,amg_c_base_ainv_solver_type, psb_c_vect_type, psb_ipk_
+      type(psb_desc_type), intent(in)      :: desc_data
+      class(amg_c_base_ainv_solver_type), intent(inout) :: sv
+      type(psb_c_vect_type),intent(inout)  :: x
+      type(psb_c_vect_type),intent(inout)  :: y
+      complex(psb_spk_),intent(in)            :: alpha,beta
+      character(len=1),intent(in)          :: trans
+      complex(psb_spk_),target, intent(inout) :: work(:)
+      type(psb_c_vect_type),intent(inout)  :: wv(:)
+      integer(psb_ipk_), intent(out)       :: info
+      character, intent(in), optional      :: init
+      type(psb_c_vect_type),intent(inout), optional   :: initu
+    end subroutine amg_c_base_ainv_solver_apply_vect
+  end interface
+
+
+  interface
+    subroutine amg_c_base_ainv_solver_free(sv,info)
+      import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat, &
+           & psb_c_vect_type, psb_c_base_vect_type, psb_spk_, amg_c_base_ainv_solver_type, psb_ipk_
+      Implicit None
+
+      ! Arguments
+      class(amg_c_base_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)                    :: info
+    end subroutine amg_c_base_ainv_solver_free
+  end interface
+
+  interface
+    subroutine amg_c_base_ainv_solver_dmp(sv,desc,level,info,prefix,head,solver,global_num)
+      import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat, &
+           & psb_c_vect_type, psb_c_base_vect_type, psb_spk_, amg_c_base_ainv_solver_type, psb_ipk_
+
+      implicit none
+      class(amg_c_base_ainv_solver_type), intent(in) :: sv
+      type(psb_desc_type), intent(in)        :: desc
+      integer(psb_ipk_), intent(in)          :: level
+      integer(psb_ipk_), intent(out)         :: info
+      character(len=*), intent(in), optional :: prefix, head
+      logical, optional, intent(in)    :: solver, global_num
+    end subroutine amg_c_base_ainv_solver_dmp
+  end interface
+
+contains
+
+  function c_base_ainv_get_nzeros(sv) result(val)
+    implicit none
+    ! Arguments
+    class(amg_c_base_ainv_solver_type), intent(in) :: sv
+    integer(psb_epk_) :: val
+    integer             :: i
+
+    val = 0
+    val = val + sv%dv%get_nrows()
+    val = val + sv%w%get_nzeros()
+    val = val + sv%z%get_nzeros()
+
+    return
+  end function c_base_ainv_get_nzeros
+
+  function c_base_ainv_solver_sizeof(sv) result(val)
+    implicit none
+    ! Arguments
+    class(amg_c_base_ainv_solver_type), intent(in) :: sv
+    integer(psb_epk_) :: val
+    integer             :: i
+
+    val = 2*psb_sizeof_ip + psb_sizeof_dp
+    val = val + sv%dv%sizeof()
+    val = val + sv%w%sizeof()
+    val = val + sv%z%sizeof()
+
+    return
+  end function c_base_ainv_solver_sizeof
+
+  function c_base_ainv_get_wrksize() result(val)
+    implicit none
+    integer(psb_ipk_)  :: val
+
+    val = 2
+  end function c_base_ainv_get_wrksize
+
+end module amg_c_base_ainv_mod

amgprec/amg_c_invk_solver.f90

@@ -0,0 +1,168 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+!
+!
+!
+!
+
+module amg_c_invk_solver
+
+  use amg_c_base_solver_mod
+  use amg_c_base_ainv_mod
+  use psb_base_mod, only : psb_c_vect_type
+
+  type, extends(amg_c_base_ainv_solver_type) :: amg_c_invk_solver_type
+    integer(psb_ipk_)   :: fill_in, inv_fill
+  contains
+    procedure, pass(sv) :: check   => amg_c_invk_solver_check
+    procedure, pass(sv) :: clone   => amg_c_invk_solver_clone
+    procedure, pass(sv) :: build   => amg_c_invk_solver_bld
+    procedure, pass(sv) :: cseti   => amg_c_invk_solver_cseti
+    procedure, pass(sv) :: seti    => amg_c_invk_solver_seti
+    generic, public     :: set     => seti
+    procedure, pass(sv) :: descr   => amg_c_invk_solver_descr
+    procedure, pass(sv) :: default => c_invk_solver_default
+  end type amg_c_invk_solver_type
+
+
+  private ::  c_invk_solver_default
+
+
+  interface
+    subroutine amg_c_invk_solver_clone(sv,svout,info)
+      import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat, &
+       & amg_c_base_solver_type, psb_spk_, amg_c_invk_solver_type, psb_ipk_
+      Implicit None
+      class(amg_c_invk_solver_type), intent(inout)              :: sv
+      class(amg_c_base_solver_type), allocatable, intent(inout) :: svout
+      integer(psb_ipk_), intent(out)                            :: info
+    end subroutine amg_c_invk_solver_clone
+  end interface
+
+  interface
+    subroutine amg_c_invk_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat, &
+       & psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
+       & amg_c_invk_solver_type, psb_i_base_vect_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      type(psb_cspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a
+      class(amg_c_invk_solver_type), intent(inout)        :: sv
+      integer(psb_ipk_), intent(out)                      :: info
+      type(psb_cspmat_type), intent(in), target, optional :: b
+      class(psb_c_base_sparse_mat), intent(in), optional  :: amold
+      class(psb_c_base_vect_type), intent(in), optional   :: vmold
+      class(psb_i_base_vect_type), intent(in), optional   :: imold
+    end subroutine amg_c_invk_solver_bld
+  end interface
+
+  interface
+    subroutine amg_c_invk_solver_check(sv,info)
+      import :: psb_spk_, amg_c_invk_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_c_invk_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_c_invk_solver_check
+  end interface
+
+  interface
+    subroutine amg_c_invk_solver_cseti(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat, &
+           & psb_ipk_, psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
+           & amg_c_invk_solver_type
+
+      Implicit None
+
+      ! Arguments
+      class(amg_c_invk_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_c_invk_solver_cseti
+  end interface
+
+  interface
+    subroutine amg_c_invk_solver_descr(sv,info,iout,coarse)
+      import :: psb_spk_, amg_c_invk_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_c_invk_solver_type), intent(in) :: sv
+      integer(psb_ipk_), intent(out)            :: info
+      integer(psb_ipk_), intent(in), optional   :: iout
+      logical, intent(in), optional             :: coarse
+
+    end subroutine amg_c_invk_solver_descr
+  end interface
+
+  interface
+    subroutine amg_c_invk_solver_seti(sv,what,val,info)
+      import :: amg_c_invk_solver_type, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_c_invk_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_c_invk_solver_seti
+  end interface
+
+contains
+
+  subroutine c_invk_solver_default(sv)
+
+    !use psb_base_mod
+
+    Implicit None
+
+    ! Arguments
+    class(amg_c_invk_solver_type), intent(inout) :: sv
+
+    sv%fill_in    = 0
+    sv%inv_fill   = 0
+
+    return
+  end subroutine c_invk_solver_default
+
+end module amg_c_invk_solver

amgprec/amg_c_invt_solver.f90

@@ -0,0 +1,194 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+!
+!
+!
+
+module amg_c_invt_solver
+
+  use amg_c_base_solver_mod
+  use amg_c_base_ainv_mod
+  use psb_base_mod, only : psb_c_vect_type
+
+  type, extends(amg_c_base_ainv_solver_type) :: amg_c_invt_solver_type
+    integer(psb_ipk_)   :: fill_in, inv_fill
+    real(psb_spk_)      :: thresh, inv_thresh
+  contains
+    procedure, pass(sv) :: check   => amg_c_invt_solver_check
+    procedure, pass(sv) :: clone   => amg_c_invt_solver_clone
+    procedure, pass(sv) :: build   => amg_c_invt_solver_bld
+    procedure, pass(sv) :: cseti   => amg_c_invt_solver_cseti
+    procedure, pass(sv) :: csetr   => amg_c_invt_solver_csetr
+    procedure, pass(sv) :: seti    => amg_c_invt_solver_seti
+    procedure, pass(sv) :: setr    => amg_c_invt_solver_setr
+    generic, public     :: set     => seti, setr
+    procedure, pass(sv) :: descr   => amg_c_invt_solver_descr
+    procedure, pass(sv) :: default => c_invt_solver_default
+  end type amg_c_invt_solver_type
+
+  private :: c_invt_solver_default
+
+
+  interface
+    subroutine amg_c_invt_solver_clone(sv,svout,info)
+      import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat, &
+       & amg_c_base_solver_type, psb_spk_, amg_c_invt_solver_type, psb_ipk_
+      Implicit None
+      class(amg_c_invt_solver_type), intent(inout)              :: sv
+      class(amg_c_base_solver_type), allocatable, intent(inout) :: svout
+      integer(psb_ipk_), intent(out)                            :: info
+    end subroutine amg_c_invt_solver_clone
+  end interface
+
+  interface
+    subroutine amg_c_invt_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat, &
+       & psb_c_vect_type, psb_c_base_vect_type, psb_spk_,&
+       & amg_c_invt_solver_type, psb_i_base_vect_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      type(psb_cspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a
+      class(amg_c_invt_solver_type), intent(inout)        :: sv
+      integer(psb_ipk_), intent(out)                      :: info
+      type(psb_cspmat_type), intent(in), target, optional :: b
+      class(psb_c_base_sparse_mat), intent(in), optional  :: amold
+      class(psb_c_base_vect_type), intent(in), optional   :: vmold
+      class(psb_i_base_vect_type), intent(in), optional  :: imold
+    end subroutine amg_c_invt_solver_bld
+  end interface
+
+  interface
+    subroutine amg_c_invt_solver_check(sv,info)
+      import :: amg_c_invt_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_c_invt_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_c_invt_solver_check
+  end interface
+
+  interface
+    subroutine amg_c_invt_solver_cseti(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat,  psb_ipk_,&
+           & psb_c_vect_type, psb_c_base_vect_type, psb_spk_, amg_c_invt_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_c_invt_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_c_invt_solver_cseti
+  end interface
+
+  interface
+    subroutine amg_c_invt_solver_csetr(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_cspmat_type,  psb_c_base_sparse_mat,  psb_ipk_,&
+           & psb_c_vect_type, psb_c_base_vect_type, psb_spk_, amg_c_invt_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_c_invt_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      real(psb_spk_), intent(in)                   :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_c_invt_solver_csetr
+  end interface
+
+  interface
+    subroutine amg_c_invt_solver_descr(sv,info,iout,coarse)
+      import :: psb_spk_, amg_c_invt_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_c_invt_solver_type), intent(in) :: sv
+      integer(psb_ipk_), intent(out)            :: info
+      integer(psb_ipk_), intent(in), optional   :: iout
+      logical, intent(in), optional             :: coarse
+
+    end subroutine amg_c_invt_solver_descr
+  end interface
+
+  interface
+    subroutine amg_c_invt_solver_setr(sv,what,val,info)
+      import :: amg_c_invt_solver_type, psb_spk_, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_c_invt_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      real(psb_spk_), intent(in)                   :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_c_invt_solver_setr
+  end interface
+
+  interface
+    subroutine amg_c_invt_solver_seti(sv,what,val,info)
+      import :: amg_c_invt_solver_type, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_c_invt_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine
+  end interface
+
+contains
+
+  subroutine c_invt_solver_default(sv)
+
+    !use psb_base_mod
+
+    Implicit None
+
+    ! Arguments
+    class(amg_c_invt_solver_type), intent(inout) :: sv
+
+    sv%fill_in    = 0
+    sv%inv_fill   = 0
+    sv%thresh     = szero
+    sv%inv_thresh = szero
+
+    return
+  end subroutine c_invt_solver_default
+
+end module amg_c_invt_solver

amgprec/amg_c_prec_mod.f90

@@ -1,15 +1,15 @@
-!   
-!   
+!
+!
 !                             AMG4PSBLAS version 1.0
 !    Algebraic Multigrid Package
 !               based on PSBLAS (Parallel Sparse BLAS version 3.5)
-!    
-!    (C) Copyright 2020 
-!  
-!        Salvatore Filippone  
-!        Pasqua D'Ambra   
-!        Fabio Durastante        
-!   
+!
+!    (C) Copyright 2020
+!
+!        Salvatore Filippone
+!        Pasqua D'Ambra
+!        Fabio Durastante
+!
 !    Redistribution and use in source and binary forms, with or without
 !    modification, are permitted provided that the following conditions
 !    are met:
@@ -21,7 +21,7 @@
 !      3. The name of the AMG4PSBLAS group or the names of its contributors may
 !         not be used to endorse or promote products derived from this
 !         software without specific written permission.
-!   
+!
 !    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 !    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 !    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
@@ -33,8 +33,8 @@
 !    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 !    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 !    POSSIBILITY OF SUCH DAMAGE.
-!   
-!  
+!
+!
 ! File: amg_c_prec_mod.f90
 !
 ! Module: amg_c_prec_mod
@@ -52,6 +52,9 @@ module amg_c_prec_mod
   use amg_c_l1_diag_solver
   use amg_c_ilu_solver
   use amg_c_gs_solver
+  use amg_c_ainv_solver
+  use amg_c_invk_solver
+  use amg_c_invt_solver
 
   interface amg_precset
     module procedure amg_c_iprecsetsm, amg_c_iprecsetsv, &
@@ -78,7 +81,7 @@ module amg_c_prec_mod
       ! !$  character, intent(in), optional         :: upd
     end subroutine amg_c_extprol_bld
   end interface amg_extprol_bld
-  
+
 contains
 
   subroutine amg_c_iprecsetsm(p,val,info,pos)
@@ -108,7 +111,7 @@ contains
 
   subroutine amg_c_cprecseti(p,what,val,info,pos)
     type(amg_cprec_type), intent(inout)   :: p
-    character(len=*), intent(in)            :: what 
+    character(len=*), intent(in)            :: what
     integer(psb_ipk_), intent(in)           :: val
     integer(psb_ipk_), intent(out)          :: info
     character(len=*), optional, intent(in)      :: pos
@@ -118,7 +121,7 @@ contains
 
   subroutine amg_c_cprecsetr(p,what,val,info,pos)
     type(amg_cprec_type), intent(inout)   :: p
-    character(len=*), intent(in)            :: what 
+    character(len=*), intent(in)            :: what
     real(psb_spk_), intent(in)             :: val
     integer(psb_ipk_), intent(out)          :: info
     character(len=*), optional, intent(in)      :: pos
@@ -128,7 +131,7 @@ contains
 
   subroutine amg_c_cprecsetc(p,what,val,info,pos)
     type(amg_cprec_type), intent(inout)   :: p
-    character(len=*), intent(in)            :: what 
+    character(len=*), intent(in)            :: what
     character(len=*), intent(in)            :: val
     integer(psb_ipk_), intent(out)          :: info
     character(len=*), optional, intent(in)      :: pos

amgprec/amg_c_prec_type.f90

@@ -1,15 +1,15 @@
-!  
-!   
+!
+!
 !                             AMG4PSBLAS version 1.0
 !    Algebraic Multigrid Package
 !               based on PSBLAS (Parallel Sparse BLAS version 3.5)
-!    
-!    (C) Copyright 2020 
-!  
-!        Salvatore Filippone  
-!        Pasqua D'Ambra   
-!        Fabio Durastante        
-!   
+!
+!    (C) Copyright 2020
+!
+!        Salvatore Filippone
+!        Pasqua D'Ambra
+!        Fabio Durastante
+!
 !    Redistribution and use in source and binary forms, with or without
 !    modification, are permitted provided that the following conditions
 !    are met:
@@ -21,7 +21,7 @@
 !      3. The name of the AMG4PSBLAS group or the names of its contributors may
 !         not be used to endorse or promote products derived from this
 !         software without specific written permission.
-!   
+!
 !    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 !    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 !    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
@@ -33,21 +33,21 @@
 !    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 !    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 !    POSSIBILITY OF SUCH DAMAGE.
-!   
-!  
+!
+!
 ! File: amg_c_prec_type.f90
 !
 ! Module: amg_c_prec_type
 !
-!  This module defines: 
+!  This module defines:
 !  - the amg_c_prec_type data structure containing the preconditioner and related
 !    data structures;
 !
 !  It contains routines for
-!  - Building and applying; 
+!  - Building and applying;
 !  - checking if the preconditioner is correctly defined;
 !  - printing a	description of the preconditioner;
-!  - deallocating the preconditioner data structure.  
+!  - deallocating the preconditioner data structure.
 !
 
 module amg_c_prec_type
@@ -70,25 +70,25 @@ module amg_c_prec_type
   !  It consists of an array of 'one-level' intermediate data structures
   !  of type amg_conelev_type, each containing the information needed to apply
   !  the smoothing and the coarse-space correction at a generic level. RT is the
-  !  real data type, i.e. S for both S and C, and D for both D and Z. 
+  !  real data type, i.e. S for both S and C, and D for both D and Z.
   !
   !  type amg_cprec_type
-  !    type(amg_conelev_type), allocatable :: precv(:) 
+  !    type(amg_conelev_type), allocatable :: precv(:)
   !  end type amg_cprec_type
-  ! 
+  !
   !  Note that the levels are numbered in increasing order starting from
   !  the level 1 as the finest one, and the number of levels is given by
-  !  size(precv(:))  which is the id of the coarsest level. 
+  !  size(precv(:))  which is the id of the coarsest level.
   !  In the multigrid literature many authors number the levels in the opposite
   !  order, with level 0 being the id of the coarsest level.
   !
   !
   integer, parameter, private :: wv_size_=4
-  
+
   type, extends(psb_cprec_type)        :: amg_cprec_type
     type(amg_saggr_data)                 :: ag_data
     !
-    ! Number of outer sweeps. Sometimes  2 V-cycles may be better than 1 W-cycle. 
+    ! Number of outer sweeps. Sometimes  2 V-cycles may be better than 1 W-cycle.
     !
     integer(psb_ipk_)                  :: outer_sweeps = 1
     !
@@ -97,11 +97,11 @@ module amg_c_prec_type
     ! to keep track against what is put later in the multilevel array
     !
     integer(psb_ipk_)                  :: coarse_solver = -1
-    
+
     !
     ! The multilevel hierarchy
     !
-    type(amg_c_onelev_type), allocatable :: precv(:) 
+    type(amg_c_onelev_type), allocatable :: precv(:)
   contains
     procedure, pass(prec)               :: psb_c_apply2_vect => amg_c_apply2_vect
     procedure, pass(prec)               :: psb_c_apply1_vect => amg_c_apply1_vect
@@ -157,7 +157,7 @@ module amg_c_prec_type
   interface amg_precdescr
     subroutine amg_cfile_prec_descr(prec,iout,root)
       import :: amg_cprec_type, psb_ipk_
-      implicit none 
+      implicit none
       ! Arguments
       class(amg_cprec_type), intent(in)      :: prec
       integer(psb_ipk_), intent(in), optional :: iout
@@ -211,7 +211,7 @@ module amg_c_prec_type
     end subroutine amg_cprecaply1
   end interface
 
-  interface 
+  interface
     subroutine amg_cprecsetsm(prec,val,info,ilev,ilmax,pos)
       import :: psb_cspmat_type, psb_desc_type, psb_spk_, &
            & amg_cprec_type, amg_c_base_smoother_type, psb_ipk_
@@ -243,7 +243,7 @@ module amg_c_prec_type
       import :: psb_cspmat_type, psb_desc_type, psb_spk_, &
            & amg_cprec_type, psb_ipk_
       class(amg_cprec_type), intent(inout)   :: prec
-      character(len=*), intent(in)             :: what 
+      character(len=*), intent(in)             :: what
       integer(psb_ipk_), intent(in)            :: val
       integer(psb_ipk_), intent(out)           :: info
       integer(psb_ipk_), optional, intent(in)  :: ilev,ilmax,idx
@@ -253,7 +253,7 @@ module amg_c_prec_type
       import :: psb_cspmat_type, psb_desc_type, psb_spk_, &
            & amg_cprec_type, psb_ipk_
       class(amg_cprec_type), intent(inout)   :: prec
-      character(len=*), intent(in)             :: what 
+      character(len=*), intent(in)             :: what
       real(psb_spk_), intent(in)                :: val
       integer(psb_ipk_), intent(out)           :: info
       integer(psb_ipk_), optional, intent(in)  :: ilev,ilmax,idx
@@ -263,7 +263,7 @@ module amg_c_prec_type
       import :: psb_cspmat_type, psb_desc_type, psb_spk_, &
            & amg_cprec_type, psb_ipk_
       class(amg_cprec_type), intent(inout)   :: prec
-      character(len=*), intent(in)             :: what 
+      character(len=*), intent(in)             :: what
       character(len=*), intent(in)             :: string
       integer(psb_ipk_), intent(out)           :: info
       integer(psb_ipk_), optional, intent(in)  :: ilev,ilmax,idx
@@ -341,28 +341,28 @@ module amg_c_prec_type
       !      character, intent(in),optional             :: upd
     end subroutine amg_c_smoothers_bld
   end interface amg_smoothers_bld
-  
+
 contains
   !
   ! Function returning a pointer to the smoother
   !
   function amg_c_get_smootherp(prec,ilev) result(val)
-    implicit none 
+    implicit none
     class(amg_cprec_type), target, intent(in) :: prec
     integer(psb_ipk_), optional                 :: ilev
     class(amg_c_base_smoother_type), pointer  :: val
     integer(psb_ipk_)        :: ilev_
-    
+
     val => null()
-    if (present(ilev)) then 
+    if (present(ilev)) then
       ilev_ = ilev
     else
-      ! What is a good default? 
+      ! What is a good default?
       ilev_ = 1
     end if
-    if (allocated(prec%precv)) then 
-      if ((1<=ilev_).and.(ilev_<=size(prec%precv))) then 
-        if (allocated(prec%precv(ilev_)%sm)) then 
+    if (allocated(prec%precv)) then
+      if ((1<=ilev_).and.(ilev_<=size(prec%precv))) then
+        if (allocated(prec%precv(ilev_)%sm)) then
           val => prec%precv(ilev_)%sm
         end if
       end if
@@ -372,23 +372,23 @@ contains
   ! Function returning a pointer to the solver
   !
   function amg_c_get_solverp(prec,ilev) result(val)
-    implicit none 
+    implicit none
     class(amg_cprec_type), target, intent(in) :: prec
     integer(psb_ipk_), optional                 :: ilev
     class(amg_c_base_solver_type), pointer  :: val
     integer(psb_ipk_)        :: ilev_
-    
+
     val => null()
-    if (present(ilev)) then 
+    if (present(ilev)) then
       ilev_ = ilev
     else
-      ! What is a good default? 
+      ! What is a good default?
       ilev_ = 1
     end if
-    if (allocated(prec%precv)) then 
-      if ((1<=ilev_).and.(ilev_<=size(prec%precv))) then 
-        if (allocated(prec%precv(ilev_)%sm)) then 
-          if (allocated(prec%precv(ilev_)%sm%sv)) then 
+    if (allocated(prec%precv)) then
+      if ((1<=ilev_).and.(ilev_<=size(prec%precv))) then
+        if (allocated(prec%precv(ilev_)%sm)) then
+          if (allocated(prec%precv(ilev_)%sm%sv)) then
             val => prec%precv(ilev_)%sm%sv
           end if
         end if
@@ -399,25 +399,25 @@ contains
   ! Function returning the size of the precv(:) array
   !
   function amg_c_get_nlevs(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_cprec_type), intent(in) :: prec
     integer(psb_ipk_) :: val
     val = 0
-    if (allocated(prec%precv)) then 
+    if (allocated(prec%precv)) then
       val = size(prec%precv)
     end if
   end function amg_c_get_nlevs
   !
   ! Function returning the size of the amg_prec_type data structure
-  ! in bytes or in number of nonzeros of the operator(s) involved. 
+  ! in bytes or in number of nonzeros of the operator(s) involved.
   !
   function amg_c_get_nzeros(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_cprec_type), intent(in) :: prec
     integer(psb_epk_) :: val
     integer(psb_ipk_)        :: i
     val = 0
-    if (allocated(prec%precv)) then 
+    if (allocated(prec%precv)) then
       do i=1, size(prec%precv)
         val = val + prec%precv(i)%get_nzeros()
       end do
@@ -425,13 +425,13 @@ contains
   end function amg_c_get_nzeros
 
   function amg_cprec_sizeof(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_cprec_type), intent(in) :: prec
     integer(psb_epk_) :: val
     integer(psb_ipk_)        :: i
     val = 0
     val = val + psb_sizeof_ip
-    if (allocated(prec%precv)) then 
+    if (allocated(prec%precv)) then
       do i=1, size(prec%precv)
         val = val + prec%precv(i)%sizeof()
       end do
@@ -444,40 +444,40 @@ contains
   ! various level to the nonzeroes at the fine level
   ! (original matrix)
   !
-  
+
   function amg_c_get_compl(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_cprec_type), intent(in) :: prec
     complex(psb_spk_)  :: val
-    
+
     val = prec%ag_data%op_complexity
 
   end function amg_c_get_compl
-  
-  subroutine amg_c_cmp_compl(prec) 
 
-    implicit none 
+  subroutine amg_c_cmp_compl(prec)
+
+    implicit none
     class(amg_cprec_type), intent(inout) :: prec
-    
+
     real(psb_spk_) :: num, den, nmin
     type(psb_ctxt_type) :: ctxt
-    integer(psb_ipk_)   :: il 
+    integer(psb_ipk_)   :: il
 
     num = -sone
     den = sone
     ctxt = prec%ctxt
-    if (allocated(prec%precv)) then 
+    if (allocated(prec%precv)) then
       il  = 1
       num = prec%precv(il)%base_a%get_nzeros()
       if (num >= szero) then
-        den = num 
+        den = num
         do il=2,size(prec%precv)
           num = num + max(0,prec%precv(il)%base_a%get_nzeros())
         end do
       end if
     end if
     nmin = num
-    call psb_min(ctxt,nmin) 
+    call psb_min(ctxt,nmin)
     if (nmin < szero) then
       num = szero
       den = sone
@@ -487,25 +487,25 @@ contains
     end if
     prec%ag_data%op_complexity = num/den
   end subroutine amg_c_cmp_compl
-  
+
   !
   ! Average coarsening ratio
   !
-  
+
   function amg_c_get_avg_cr(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_cprec_type), intent(in) :: prec
     complex(psb_spk_)  :: val
-    
+
     val = prec%ag_data%avg_cr
 
   end function amg_c_get_avg_cr
-  
-  subroutine amg_c_cmp_avg_cr(prec) 
 
-    implicit none 
+  subroutine amg_c_cmp_avg_cr(prec)
+
+    implicit none
     class(amg_cprec_type), intent(inout) :: prec
-    
+
     real(psb_spk_)    :: avgcr
     type(psb_ctxt_type) :: ctxt
     integer(psb_ipk_)   :: il, nl, iam, np
@@ -519,12 +519,12 @@ contains
       do il=2,nl
         avgcr = avgcr + max(szero,prec%precv(il)%szratio)
       end do
-      avgcr = avgcr / (nl-1)      
+      avgcr = avgcr / (nl-1)
     end if
-    call psb_sum(ctxt,avgcr) 
+    call psb_sum(ctxt,avgcr)
     prec%ag_data%avg_cr = avgcr/np
   end subroutine amg_c_cmp_avg_cr
-  
+
   !
   ! Subroutines: amg_Tprec_free
   ! Version: complex
@@ -538,74 +538,74 @@ contains
   !             error code.
   !
   subroutine amg_cprecfree(p,info)
-  
+
     implicit none
-    
+
     ! Arguments
     type(amg_cprec_type), intent(inout) :: p
     integer(psb_ipk_), intent(out)        :: info
-    
+
     ! Local variables
     integer(psb_ipk_)   :: me,err_act,i
     character(len=20)   :: name
-    
+
     info=psb_success_
     name = 'amg_cprecfree'
     call psb_erractionsave(err_act)
     if (psb_errstatus_fatal()) then
       info = psb_err_internal_error_; return
     end if
-    
+
     me=-1
-    
+
     call p%free(info)
 
-    
+
     return
-    
+
   end subroutine amg_cprecfree
 
   subroutine amg_c_prec_free(prec,info)
-    
+
     implicit none
-    
+
     ! Arguments
     class(amg_cprec_type), intent(inout) :: prec
     integer(psb_ipk_), intent(out)        :: info
-    
+
     ! Local variables
     integer(psb_ipk_)   :: me,err_act,i
     character(len=20)   :: name
-    
+
     info=psb_success_
     name = 'amg_cprecfree'
     call psb_erractionsave(err_act)
     if (psb_errstatus_fatal()) then
       info = psb_err_internal_error_; goto 9999
     end if
-    
+
     me=-1
-    if (allocated(prec%precv)) then 
-      do i=1,size(prec%precv) 
+    if (allocated(prec%precv)) then
+      do i=1,size(prec%precv)
         call prec%precv(i)%free(info)
       end do
       deallocate(prec%precv,stat=info)
     end if
     call psb_erractionrestore(err_act)
     return
-    
+
 9999 call psb_error_handler(err_act)
     return
-    
+
   end subroutine amg_c_prec_free
 
-  
+
 
   !
-  ! Top level methods. 
+  ! Top level methods.
   !
   subroutine amg_c_apply2_vect(prec,x,y,desc_data,info,trans,work)
-    implicit none 
+    implicit none
     type(psb_desc_type),intent(in)        :: desc_data
     class(amg_cprec_type), intent(inout)  :: prec
     type(psb_c_vect_type),intent(inout)   :: x
@@ -618,13 +618,13 @@ contains
 
     call psb_erractionsave(err_act)
 
-    select type(prec) 
+    select type(prec)
     type is (amg_cprec_type)
       call amg_precapply(prec,x,y,desc_data,info,trans,work)
     class default
       info = psb_err_missing_override_method_
       call psb_errpush(info,name)
-      goto 9999 
+      goto 9999
     end select
 
     call psb_erractionrestore(err_act)
@@ -636,7 +636,7 @@ contains
   end subroutine amg_c_apply2_vect
 
   subroutine amg_c_apply1_vect(prec,x,desc_data,info,trans,work)
-    implicit none 
+    implicit none
     type(psb_desc_type),intent(in)          :: desc_data
     class(amg_cprec_type), intent(inout)  :: prec
     type(psb_c_vect_type),intent(inout)   :: x
@@ -648,13 +648,13 @@ contains
 
     call psb_erractionsave(err_act)
 
-    select type(prec) 
+    select type(prec)
     type is (amg_cprec_type)
       call amg_precapply(prec,x,desc_data,info,trans,work)
     class default
       info = psb_err_missing_override_method_
       call psb_errpush(info,name)
-      goto 9999 
+      goto 9999
     end select
 
     call psb_erractionrestore(err_act)
@@ -667,7 +667,7 @@ contains
 
 
   subroutine amg_c_apply2v(prec,x,y,desc_data,info,trans,work)
-    implicit none 
+    implicit none
     type(psb_desc_type),intent(in)    :: desc_data
     class(amg_cprec_type), intent(inout) :: prec
     complex(psb_spk_),intent(inout)      :: x(:)
@@ -680,13 +680,13 @@ contains
 
     call psb_erractionsave(err_act)
 
-    select type(prec) 
+    select type(prec)
     type is (amg_cprec_type)
       call amg_precapply(prec,x,y,desc_data,info,trans,work)
     class default
       info = psb_err_missing_override_method_
       call psb_errpush(info,name)
-      goto 9999 
+      goto 9999
     end select
 
     call psb_erractionrestore(err_act)
@@ -698,7 +698,7 @@ contains
   end subroutine amg_c_apply2v
 
   subroutine amg_c_apply1v(prec,x,desc_data,info,trans)
-    implicit none 
+    implicit none
     type(psb_desc_type),intent(in)    :: desc_data
     class(amg_cprec_type), intent(inout) :: prec
     complex(psb_spk_),intent(inout)      :: x(:)
@@ -709,13 +709,13 @@ contains
 
     call psb_erractionsave(err_act)
 
-    select type(prec) 
+    select type(prec)
     type is (amg_cprec_type)
       call amg_precapply(prec,x,desc_data,info,trans)
     class default
       info = psb_err_missing_override_method_
       call psb_errpush(info,name)
-      goto 9999 
+      goto 9999
     end select
 
     call psb_erractionrestore(err_act)
@@ -730,8 +730,8 @@ contains
   subroutine amg_c_dump(prec,info,istart,iend,iproc,prefix,head,&
        & ac,rp,smoother,solver,tprol,&
        & global_num)
-    
-    implicit none 
+
+    implicit none
     class(amg_cprec_type), intent(in)     :: prec
     integer(psb_ipk_), intent(out)          :: info
     integer(psb_ipk_), intent(in), optional :: istart, iend, iproc
@@ -742,27 +742,26 @@ contains
     integer(psb_ipk_)   :: iam, np, iproc_
     character(len=80)   :: prefix_
     character(len=120)  :: fname ! len should be at least 20 more than
-    !  len of prefix_ 
+    !  len of prefix_
 
     info = 0
     ctxt = prec%ctxt
     call psb_info(ctxt,iam,np)
-    
     iln = size(prec%precv)
-    if (present(istart)) then 
+    if (present(istart)) then
       il1 = max(1,istart)
     else
       il1 = min(2,iln)
     end if
-    if (present(iend)) then 
+    if (present(iend)) then
       iln = min(iln, iend)
     end if
     iproc_ = -1
-    if (present(iproc)) then 
+    if (present(iproc)) then
       iproc_ = iproc
     end if
 
-    if ((iproc_ == -1).or.(iproc_==iam)) then 
+    if ((iproc_ == -1).or.(iproc_==iam)) then
       do lev=il1, iln
         call prec%precv(lev)%dump(lev,info,prefix=prefix,head=head,&
              & ac=ac,smoother=smoother,solver=solver,rp=rp,tprol=tprol, &
@@ -773,7 +772,7 @@ contains
 
   subroutine amg_c_cnv(prec,info,amold,vmold,imold)
 
-    implicit none 
+    implicit none
     class(amg_cprec_type), intent(inout) :: prec
     integer(psb_ipk_), intent(out)       :: info
     class(psb_c_base_sparse_mat), intent(in), optional :: amold
@@ -781,7 +780,7 @@ contains
     class(psb_i_base_vect_type), intent(in), optional  :: imold
 
     integer(psb_ipk_) :: i
-    
+
     info = psb_success_
     if (allocated(prec%precv)) then
       do i=1,size(prec%precv)
@@ -789,24 +788,24 @@ contains
              & call prec%precv(i)%cnv(info,amold=amold,vmold=vmold,imold=imold)
       end do
     end if
-    
+
   end subroutine amg_c_cnv
 
   subroutine amg_c_clone(prec,precout,info)
 
-    implicit none 
+    implicit none
     class(amg_cprec_type), intent(inout) :: prec
     class(psb_cprec_type), intent(inout) :: precout
     integer(psb_ipk_), intent(out)       :: info
-    
+
     call precout%free(info)
-    if (info == 0) call amg_c_inner_clone(prec,precout,info) 
+    if (info == 0) call amg_c_inner_clone(prec,precout,info)
 
   end subroutine amg_c_clone
 
   subroutine amg_c_inner_clone(prec,precout,info)
 
-    implicit none 
+    implicit none
     class(amg_cprec_type), intent(inout)         :: prec
     class(psb_cprec_type), target, intent(inout) :: precout
     integer(psb_ipk_), intent(out)             :: info
@@ -821,17 +820,17 @@ contains
       pout%ctxt          = prec%ctxt
       pout%ag_data       = prec%ag_data
       pout%outer_sweeps  = prec%outer_sweeps
-      if (allocated(prec%precv)) then 
-        ln = size(prec%precv) 
+      if (allocated(prec%precv)) then
+        ln = size(prec%precv)
         allocate(pout%precv(ln),stat=info)
         if (info /= psb_success_) goto 9999
-        if (ln >= 1) then 
+        if (ln >= 1) then
           call prec%precv(1)%clone(pout%precv(1),info)
         end if
         do lev=2, ln
           if (info /= psb_success_) exit
           call prec%precv(lev)%clone(pout%precv(lev),info)
-          if (info == psb_success_) then 
+          if (info == psb_success_) then
             pout%precv(lev)%base_a       => pout%precv(lev)%ac
             pout%precv(lev)%base_desc    => pout%precv(lev)%desc_ac
             pout%precv(lev)%linmap%p_desc_U => pout%precv(lev-1)%base_desc
@@ -842,7 +841,7 @@ contains
       if (allocated(prec%precv(1)%wrk)) &
            & call pout%allocate_wrk(info,vmold=prec%precv(1)%wrk%vx2l%v)
 
-    class default 
+    class default
       write(0,*) 'Error: wrong out type'
       info = psb_err_invalid_input_
     end select
@@ -854,14 +853,14 @@ contains
     implicit none
     class(amg_cprec_type), intent(inout) :: prec
     class(amg_cprec_type), intent(inout), target :: b
-    integer(psb_ipk_), intent(out) :: info 
+    integer(psb_ipk_), intent(out) :: info
     integer(psb_ipk_) :: i
-    
-    if (same_type_as(prec,b)) then 
-      if (allocated(b%precv)) then 
+
+    if (same_type_as(prec,b)) then
+      if (allocated(b%precv)) then
         ! This might not be required if FINAL procedures are available.
         call b%free(info)
-        if (info /= psb_success_) then 
+        if (info /= psb_success_) then
           !?????
 !!$        return
         endif
@@ -869,7 +868,7 @@ contains
       b%ctxt         = prec%ctxt
       b%ag_data       = prec%ag_data
       b%outer_sweeps  = prec%outer_sweeps
-            
+
       call move_alloc(prec%precv,b%precv)
       ! Fix the pointers except on level 1.
       do i=2, size(b%precv)
@@ -878,7 +877,7 @@ contains
         b%precv(i)%linmap%p_desc_U => b%precv(i-1)%base_desc
         b%precv(i)%linmap%p_desc_V => b%precv(i)%base_desc
       end do
-            
+
     else
       write(0,*) 'Warning: PREC%move_alloc onto different type?'
       info = psb_err_internal_error_
@@ -888,7 +887,7 @@ contains
   subroutine amg_c_allocate_wrk(prec,info,vmold,desc)
     use psb_base_mod
     implicit none
-    
+
     ! Arguments
     class(amg_cprec_type), intent(inout) :: prec
     integer(psb_ipk_), intent(out)        :: info
@@ -896,37 +895,37 @@ contains
     !
     ! In MLD the DESC optional argument is ignored, since
     ! the necessary info is contained in the various entries of the
-    ! PRECV component. 
+    ! PRECV component.
     type(psb_desc_type), intent(in), optional  :: desc
-    
+
     ! Local variables
     integer(psb_ipk_)   :: me,err_act,i,j,level,nlev, nc2l
     character(len=20)   :: name
-    
+
     info=psb_success_
     name = 'amg_c_allocate_wrk'
     call psb_erractionsave(err_act)
     if (psb_errstatus_fatal()) then
       info = psb_err_internal_error_; goto 9999
     end if
-    nlev   = size(prec%precv)  
+    nlev   = size(prec%precv)
     level = 1
     do level = 1, nlev
       call prec%precv(level)%allocate_wrk(info,vmold=vmold)
-      if (psb_errstatus_fatal()) then 
+      if (psb_errstatus_fatal()) then
         nc2l = prec%precv(level)%base_desc%get_local_cols()
         info=psb_err_alloc_request_
         call psb_errpush(info,name,i_err=(/2*nc2l/), a_err='complex(psb_spk_)')
-        goto 9999      
+        goto 9999
       end if
     end do
 
     call psb_erractionrestore(err_act)
     return
-    
+
 9999 call psb_error_handler(err_act)
     return
-    
+
   end subroutine amg_c_allocate_wrk
 
   subroutine amg_c_free_wrk(prec,info)
@@ -948,13 +947,13 @@ contains
       info = psb_err_internal_error_; goto 9999
     end if
 
-    if (allocated(prec%precv)) then 
-      nlev   = size(prec%precv)  
+    if (allocated(prec%precv)) then
+      nlev   = size(prec%precv)
       do level = 1, nlev
         call prec%precv(level)%free_wrk(info)
       end do
     end if
-    
+
     call psb_erractionrestore(err_act)
     return
 
@@ -966,7 +965,7 @@ contains
   function amg_c_is_allocated_wrk(prec) result(res)
     use psb_base_mod
     implicit none
-    
+
     ! Arguments
     class(amg_cprec_type), intent(in) :: prec
     logical :: res
@@ -974,7 +973,7 @@ contains
     res = .false.
     if (.not.allocated(prec%precv)) return
     res = allocated(prec%precv(1)%wrk)
-     
+
   end function amg_c_is_allocated_wrk
 
 end module amg_c_prec_type

amgprec/amg_d_ainv_solver.F90

@@ -0,0 +1,321 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+!
+!
+!
+!
+module amg_d_ainv_solver
+
+  use amg_d_base_ainv_mod
+  use psb_base_mod, only : psb_d_vect_type
+
+  type, extends(amg_d_base_ainv_solver_type) :: amg_d_ainv_solver_type
+    !
+    !  Compute an approximate factorization
+    !      A^-1 = Z D^-1 W^T
+    !  Note that here W is going to be transposed explicitly,
+    !  so that the component w will in the end contain W^T.
+    !
+    integer(psb_ipk_)   :: alg, fill_in
+    real(psb_dpk_)      :: thresh
+  contains
+    procedure, pass(sv) :: check   => amg_d_ainv_solver_check
+    procedure, pass(sv) :: build   => amg_d_ainv_solver_bld
+    procedure, pass(sv) :: clone   => amg_d_ainv_solver_clone
+    procedure, pass(sv) :: cseti   => amg_d_ainv_solver_cseti
+    procedure, pass(sv) :: csetc   => amg_d_ainv_solver_csetc
+    procedure, pass(sv) :: csetr   => amg_d_ainv_solver_csetr
+    procedure, pass(sv) :: seti    => amg_d_ainv_solver_seti
+    procedure, pass(sv) :: setc    => amg_d_ainv_solver_setc
+    procedure, pass(sv) :: setr    => amg_d_ainv_solver_setr
+    generic, public :: set => seti, setr, setc
+    procedure, pass(sv) :: descr   => amg_d_ainv_solver_descr
+    procedure, pass(sv) :: default => d_ainv_solver_default
+    procedure, nopass   :: stringval  => d_ainv_stringval
+    procedure, nopass   :: algname => d_ainv_algname
+  end type amg_d_ainv_solver_type
+
+
+  private :: d_ainv_stringval, d_ainv_solver_default, &
+       &  d_ainv_algname
+
+  interface
+    subroutine amg_d_ainv_solver_clone(sv,svout,info)
+      import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat, &
+       & amg_d_base_solver_type, psb_dpk_, amg_d_ainv_solver_type, psb_ipk_
+      Implicit None
+      class(amg_d_ainv_solver_type), intent(inout)              :: sv
+      class(amg_d_base_solver_type), allocatable, intent(inout) :: svout
+      integer(psb_ipk_), intent(out)                            :: info
+    end subroutine amg_d_ainv_solver_clone
+  end interface
+
+
+  interface
+    subroutine amg_d_ainv_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat, &
+       & psb_d_vect_type, psb_d_base_vect_type, psb_dpk_,&
+       & amg_d_ainv_solver_type, psb_i_base_vect_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      type(psb_dspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a
+      class(amg_d_ainv_solver_type), intent(inout)        :: sv
+      integer(psb_ipk_), intent(out)                      :: info
+      type(psb_dspmat_type), intent(in), target, optional :: b
+      class(psb_d_base_sparse_mat), intent(in), optional  :: amold
+      class(psb_d_base_vect_type), intent(in), optional   :: vmold
+      class(psb_i_base_vect_type), intent(in), optional   :: imold
+    end subroutine amg_d_ainv_solver_bld
+  end interface
+
+  interface
+    subroutine amg_d_ainv_solver_check(sv,info)
+      import :: psb_dpk_, amg_d_ainv_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_d_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_d_ainv_solver_check
+  end interface
+
+  interface
+    subroutine amg_d_ainv_solver_cseti(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat, psb_ipk_,&
+           & psb_d_vect_type, psb_d_base_vect_type, psb_dpk_, amg_d_ainv_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_d_ainv_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_d_ainv_solver_cseti
+  end interface
+
+
+  interface
+    subroutine amg_d_ainv_solver_csetc(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat, psb_ipk_,&
+           & psb_d_vect_type, psb_d_base_vect_type, psb_dpk_, amg_d_ainv_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_d_ainv_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      character(len=*), intent(in)                 :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_d_ainv_solver_csetc
+  end interface
+
+  interface
+    subroutine amg_d_ainv_solver_csetr(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat,  psb_ipk_,&
+           & psb_d_vect_type, psb_d_base_vect_type, psb_dpk_, amg_d_ainv_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_d_ainv_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      real(psb_dpk_), intent(in)                   :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_d_ainv_solver_csetr
+  end interface
+
+  interface
+    subroutine amg_d_ainv_solver_setc(sv,what,val,info)
+      import :: amg_d_ainv_solver_type, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_d_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      character(len=*), intent(in)                 :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_d_ainv_solver_setc
+  end interface
+
+  interface
+    subroutine amg_d_ainv_solver_seti(sv,what,val,info)
+      import :: amg_d_ainv_solver_type, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_d_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_d_ainv_solver_seti
+  end interface
+
+  interface
+    subroutine amg_d_ainv_solver_setr(sv,what,val,info)
+      import :: amg_d_ainv_solver_type, psb_ipk_, psb_dpk_
+      Implicit none
+      ! Arguments
+      class(amg_d_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      real(psb_dpk_), intent(in)                   :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_d_ainv_solver_setr
+  end interface
+
+  interface
+    subroutine amg_d_ainv_solver_descr(sv,info,iout,coarse)
+      import :: psb_dpk_, amg_d_ainv_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_d_ainv_solver_type), intent(in) :: sv
+      integer(psb_ipk_), intent(out)            :: info
+      integer(psb_ipk_), intent(in), optional   :: iout
+      logical, intent(in), optional             :: coarse
+
+    end subroutine amg_d_ainv_solver_descr
+  end interface
+
+  interface  amg_ainv_bld
+    subroutine amg_d_ainv_bld(a,alg,fillin,thresh,wmat,d,zmat,desc,info,blck,iscale)
+      import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat, &
+           & psb_d_vect_type, psb_d_base_vect_type, psb_dpk_, psb_ipk_
+      implicit none
+      type(psb_dspmat_type), intent(in), target   :: a
+      integer(psb_ipk_), intent(in)               :: fillin,alg
+      real(psb_dpk_), intent(in)                  :: thresh
+      type(psb_dspmat_type), intent(inout)        :: wmat, zmat
+      real(psb_dpk_), allocatable                 :: d(:)
+      Type(psb_desc_type), Intent(inout)          :: desc
+      integer(psb_ipk_), intent(out)              :: info
+      type(psb_dspmat_type), intent(in), optional :: blck
+      integer(psb_ipk_), intent(in), optional     :: iscale
+    end subroutine amg_d_ainv_bld
+  end interface
+
+
+contains
+
+  subroutine d_ainv_solver_default(sv)
+
+    use psb_base_mod
+
+    Implicit None
+
+    ! Arguments
+    class(amg_d_ainv_solver_type), intent(inout) :: sv
+
+    sv%alg     = amg_ainv_llk_
+    sv%fill_in = 0
+    sv%thresh  = dzero
+
+    return
+  end subroutine d_ainv_solver_default
+
+  function is_positive_nz_min(ip) result(res)
+    implicit none
+    integer(psb_ipk_), intent(in) :: ip
+    logical             :: res
+
+    res = (ip >= 1)
+    return
+  end function is_positive_nz_min
+
+
+  function d_ainv_stringval(string) result(val)
+    use psb_base_mod, only : psb_ipk_,psb_toupper
+    implicit none
+  ! Arguments
+    character(len=*), intent(in) :: string
+    integer(psb_ipk_) :: val
+    character(len=*), parameter :: name='d_ainv_stringval'
+
+    select case(psb_toupper(trim(string)))
+    case('LLK')
+      val = amg_ainv_llk_
+    case('STAB-LLK')
+      val = amg_ainv_s_ft_llk_
+    case('SYM-LLK')
+      val = amg_ainv_s_llk_
+    case('MLK')
+      val = amg_ainv_mlk_
+#if defined(HAVE_TUMA_SAINV)
+    case('SAINV-TUMA')
+      val = amg_ainv_s_tuma_
+    case('LAINV-TUMA')
+      val = amg_ainv_l_tuma_
+#endif
+    case default
+      val  = amg_stringval(string)
+    end select
+  end function d_ainv_stringval
+
+
+  function d_ainv_algname(ialg) result(val)
+    integer(psb_ipk_), intent(in) :: ialg
+    character(len=40) :: val
+
+    character(len=*), parameter :: mlkname   = 'Left-looking, list merge '
+    character(len=*), parameter :: llkname   = 'Left-looking '
+    character(len=*), parameter :: stabllkname  = 'Stabilized Left-looking '
+    character(len=*), parameter :: sllkname  = 'Symmetric Left-looking '
+    character(len=*), parameter :: sainvname = 'SAINV (Benzi & Tuma) '
+    character(len=*), parameter :: lainvname = 'LAINV (Benzi & Tuma) '
+    character(len=*), parameter :: defname   = 'Unknown alg variant '
+
+    select case (ialg)
+    case(amg_ainv_mlk_)
+      val = mlkname
+    case(amg_ainv_llk_)
+      val = llkname
+    case(amg_ainv_s_llk_)
+      val = sllkname
+    case(amg_ainv_s_ft_llk_)
+      val = stabllkname
+#if defined(HAVE_TUMA_SAINV)
+    case(amg_ainv_s_tuma_ )
+      val = sainvname
+    case(amg_ainv_l_tuma_ )
+      val = lainvname
+#endif
+    case default
+      val = defname
+    end select
+
+  end function d_ainv_algname
+
+end module amg_d_ainv_solver

amgprec/amg_d_base_ainv_mod.f90

@@ -0,0 +1,199 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+module amg_d_base_ainv_mod
+
+  use amg_base_ainv_mod
+  use amg_d_base_solver_mod
+  use psb_d_ainv_tools_mod
+  use psb_base_mod, only : psb_d_vect_type, psb_dpk_, psb_epk_
+
+
+
+  type, extends(amg_d_base_solver_type) :: amg_d_base_ainv_solver_type
+    !
+    !  Compute an approximate factorization
+    !      A^-1 = Z D^-1 W^T
+    !  Note that here W is going to be transposed explicitly,
+    !  so that the component w will in the end contain W^T.
+    !
+    type(psb_dspmat_type)       :: w, z
+    type(psb_d_vect_type)       :: dv
+    real(psb_dpk_), allocatable :: d(:)
+
+  contains
+    procedure, pass(sv) :: cnv     => amg_d_base_ainv_solver_cnv
+    procedure, pass(sv) :: dump    => amg_d_base_ainv_solver_dmp
+    procedure, pass(sv) :: apply_v => amg_d_base_ainv_solver_apply_vect
+    procedure, pass(sv) :: apply_a => amg_d_base_ainv_solver_apply
+    procedure, pass(sv) :: free    => amg_d_base_ainv_solver_free
+    procedure, pass(sv) :: sizeof  => d_base_ainv_solver_sizeof
+    procedure, pass(sv) :: get_nzeros => d_base_ainv_get_nzeros
+    procedure, nopass   :: get_wrksz => d_base_ainv_get_wrksize
+    procedure, pass(sv) :: update_a => amg_d_base_ainv_update_a
+    generic, public     :: update => update_a
+  end type amg_d_base_ainv_solver_type
+
+  private ::  d_base_ainv_solver_sizeof, &
+       & d_base_ainv_get_nzeros, d_base_ainv_get_wrksize
+
+
+  interface
+    subroutine amg_d_base_ainv_solver_cnv(sv,info,amold,vmold,imold)
+      import :: psb_d_base_sparse_mat, psb_d_base_vect_type, psb_dpk_, &
+       & amg_d_base_ainv_solver_type, psb_ipk_, psb_i_base_vect_type
+      Implicit None
+      ! Arguments
+      class(amg_d_base_ainv_solver_type), intent(inout)  :: sv
+      integer(psb_ipk_), intent(out)                     :: info
+      class(psb_d_base_sparse_mat), intent(in), optional :: amold
+      class(psb_d_base_vect_type), intent(in), optional  :: vmold
+      class(psb_i_base_vect_type), intent(in), optional  :: imold
+    end subroutine amg_d_base_ainv_solver_cnv
+  end interface
+
+  interface
+    subroutine amg_d_base_ainv_update_a(sv,x,desc_data,info)
+      import :: psb_desc_type, psb_dpk_,amg_d_base_ainv_solver_type, psb_d_vect_type, psb_ipk_
+      type(psb_desc_type), intent(in)      :: desc_data
+      class(amg_d_base_ainv_solver_type), intent(inout) :: sv
+      real(psb_dpk_),intent(in)            :: x(:)
+      integer(psb_ipk_), intent(out)       :: info
+    end subroutine amg_d_base_ainv_update_a
+  end interface
+
+  interface
+    subroutine amg_d_base_ainv_solver_apply(alpha,sv,x,beta,y,desc_data,&
+         & trans,work,info,init,initu)
+      import :: psb_desc_type, psb_dpk_,amg_d_base_ainv_solver_type, psb_ipk_
+      type(psb_desc_type), intent(in)      :: desc_data
+      class(amg_d_base_ainv_solver_type), intent(inout) :: sv
+      real(psb_dpk_),intent(inout)         :: x(:)
+      real(psb_dpk_),intent(inout)         :: y(:)
+      real(psb_dpk_),intent(in)            :: alpha,beta
+      character(len=1),intent(in)          :: trans
+      real(psb_dpk_),target, intent(inout) :: work(:)
+      integer(psb_ipk_), intent(out)       :: info
+      character, intent(in), optional      :: init
+      real(psb_dpk_),intent(inout), optional :: initu(:)
+    end subroutine amg_d_base_ainv_solver_apply
+  end interface
+
+  interface
+    subroutine amg_d_base_ainv_solver_apply_vect(alpha,sv,x,beta,y,desc_data,&
+         &  trans,work,wv,info,init,initu)
+      import :: psb_desc_type, psb_dpk_,amg_d_base_ainv_solver_type, psb_d_vect_type, psb_ipk_
+      type(psb_desc_type), intent(in)      :: desc_data
+      class(amg_d_base_ainv_solver_type), intent(inout) :: sv
+      type(psb_d_vect_type),intent(inout)  :: x
+      type(psb_d_vect_type),intent(inout)  :: y
+      real(psb_dpk_),intent(in)            :: alpha,beta
+      character(len=1),intent(in)          :: trans
+      real(psb_dpk_),target, intent(inout) :: work(:)
+      type(psb_d_vect_type),intent(inout)  :: wv(:)
+      integer(psb_ipk_), intent(out)       :: info
+      character, intent(in), optional      :: init
+      type(psb_d_vect_type),intent(inout), optional   :: initu
+    end subroutine amg_d_base_ainv_solver_apply_vect
+  end interface
+
+
+  interface
+    subroutine amg_d_base_ainv_solver_free(sv,info)
+      import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat, &
+           & psb_d_vect_type, psb_d_base_vect_type, psb_dpk_, amg_d_base_ainv_solver_type, psb_ipk_
+      Implicit None
+
+      ! Arguments
+      class(amg_d_base_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)                    :: info
+    end subroutine amg_d_base_ainv_solver_free
+  end interface
+
+  interface
+    subroutine amg_d_base_ainv_solver_dmp(sv,desc,level,info,prefix,head,solver,global_num)
+      import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat, &
+           & psb_d_vect_type, psb_d_base_vect_type, psb_dpk_, amg_d_base_ainv_solver_type, psb_ipk_
+
+      implicit none
+      class(amg_d_base_ainv_solver_type), intent(in) :: sv
+      type(psb_desc_type), intent(in)        :: desc
+      integer(psb_ipk_), intent(in)          :: level
+      integer(psb_ipk_), intent(out)         :: info
+      character(len=*), intent(in), optional :: prefix, head
+      logical, optional, intent(in)    :: solver, global_num
+    end subroutine amg_d_base_ainv_solver_dmp
+  end interface
+
+contains
+
+  function d_base_ainv_get_nzeros(sv) result(val)
+    implicit none
+    ! Arguments
+    class(amg_d_base_ainv_solver_type), intent(in) :: sv
+    integer(psb_epk_) :: val
+    integer             :: i
+
+    val = 0
+    val = val + sv%dv%get_nrows()
+    val = val + sv%w%get_nzeros()
+    val = val + sv%z%get_nzeros()
+
+    return
+  end function d_base_ainv_get_nzeros
+
+  function d_base_ainv_solver_sizeof(sv) result(val)
+    implicit none
+    ! Arguments
+    class(amg_d_base_ainv_solver_type), intent(in) :: sv
+    integer(psb_epk_) :: val
+    integer             :: i
+
+    val = 2*psb_sizeof_ip + psb_sizeof_dp
+    val = val + sv%dv%sizeof()
+    val = val + sv%w%sizeof()
+    val = val + sv%z%sizeof()
+
+    return
+  end function d_base_ainv_solver_sizeof
+
+  function d_base_ainv_get_wrksize() result(val)
+    implicit none
+    integer(psb_ipk_)  :: val
+
+    val = 2
+  end function d_base_ainv_get_wrksize
+
+end module amg_d_base_ainv_mod

amgprec/amg_d_invk_solver.f90

@@ -0,0 +1,168 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+!
+!
+!
+!
+
+module amg_d_invk_solver
+
+  use amg_d_base_solver_mod
+  use amg_d_base_ainv_mod
+  use psb_base_mod, only : psb_d_vect_type
+
+  type, extends(amg_d_base_ainv_solver_type) :: amg_d_invk_solver_type
+    integer(psb_ipk_)   :: fill_in, inv_fill
+  contains
+    procedure, pass(sv) :: check   => amg_d_invk_solver_check
+    procedure, pass(sv) :: clone   => amg_d_invk_solver_clone
+    procedure, pass(sv) :: build   => amg_d_invk_solver_bld
+    procedure, pass(sv) :: cseti   => amg_d_invk_solver_cseti
+    procedure, pass(sv) :: seti    => amg_d_invk_solver_seti
+    generic, public     :: set     => seti
+    procedure, pass(sv) :: descr   => amg_d_invk_solver_descr
+    procedure, pass(sv) :: default => d_invk_solver_default
+  end type amg_d_invk_solver_type
+
+
+  private ::  d_invk_solver_default
+
+
+  interface
+    subroutine amg_d_invk_solver_clone(sv,svout,info)
+      import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat, &
+       & amg_d_base_solver_type, psb_dpk_, amg_d_invk_solver_type, psb_ipk_
+      Implicit None
+      class(amg_d_invk_solver_type), intent(inout)              :: sv
+      class(amg_d_base_solver_type), allocatable, intent(inout) :: svout
+      integer(psb_ipk_), intent(out)                            :: info
+    end subroutine amg_d_invk_solver_clone
+  end interface
+
+  interface
+    subroutine amg_d_invk_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat, &
+       & psb_d_vect_type, psb_d_base_vect_type, psb_dpk_, &
+       & amg_d_invk_solver_type, psb_i_base_vect_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      type(psb_dspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a
+      class(amg_d_invk_solver_type), intent(inout)        :: sv
+      integer(psb_ipk_), intent(out)                      :: info
+      type(psb_dspmat_type), intent(in), target, optional :: b
+      class(psb_d_base_sparse_mat), intent(in), optional  :: amold
+      class(psb_d_base_vect_type), intent(in), optional   :: vmold
+      class(psb_i_base_vect_type), intent(in), optional   :: imold
+    end subroutine amg_d_invk_solver_bld
+  end interface
+
+  interface
+    subroutine amg_d_invk_solver_check(sv,info)
+      import :: psb_dpk_, amg_d_invk_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_d_invk_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_d_invk_solver_check
+  end interface
+
+  interface
+    subroutine amg_d_invk_solver_cseti(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat, &
+           & psb_ipk_, psb_d_vect_type, psb_d_base_vect_type, psb_dpk_, &
+           & amg_d_invk_solver_type
+
+      Implicit None
+
+      ! Arguments
+      class(amg_d_invk_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_d_invk_solver_cseti
+  end interface
+
+  interface
+    subroutine amg_d_invk_solver_descr(sv,info,iout,coarse)
+      import :: psb_dpk_, amg_d_invk_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_d_invk_solver_type), intent(in) :: sv
+      integer(psb_ipk_), intent(out)            :: info
+      integer(psb_ipk_), intent(in), optional   :: iout
+      logical, intent(in), optional             :: coarse
+
+    end subroutine amg_d_invk_solver_descr
+  end interface
+
+  interface
+    subroutine amg_d_invk_solver_seti(sv,what,val,info)
+      import :: amg_d_invk_solver_type, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_d_invk_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_d_invk_solver_seti
+  end interface
+
+contains
+
+  subroutine d_invk_solver_default(sv)
+
+    !use psb_base_mod
+
+    Implicit None
+
+    ! Arguments
+    class(amg_d_invk_solver_type), intent(inout) :: sv
+
+    sv%fill_in    = 0
+    sv%inv_fill   = 0
+
+    return
+  end subroutine d_invk_solver_default
+
+end module amg_d_invk_solver

amgprec/amg_d_invt_solver.f90

@@ -0,0 +1,194 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+!
+!
+!
+
+module amg_d_invt_solver
+
+  use amg_d_base_solver_mod
+  use amg_d_base_ainv_mod
+  use psb_base_mod, only : psb_d_vect_type
+
+  type, extends(amg_d_base_ainv_solver_type) :: amg_d_invt_solver_type
+    integer(psb_ipk_)   :: fill_in, inv_fill
+    real(psb_dpk_)      :: thresh, inv_thresh
+  contains
+    procedure, pass(sv) :: check   => amg_d_invt_solver_check
+    procedure, pass(sv) :: clone   => amg_d_invt_solver_clone
+    procedure, pass(sv) :: build   => amg_d_invt_solver_bld
+    procedure, pass(sv) :: cseti   => amg_d_invt_solver_cseti
+    procedure, pass(sv) :: csetr   => amg_d_invt_solver_csetr
+    procedure, pass(sv) :: seti    => amg_d_invt_solver_seti
+    procedure, pass(sv) :: setr    => amg_d_invt_solver_setr
+    generic, public     :: set     => seti, setr
+    procedure, pass(sv) :: descr   => amg_d_invt_solver_descr
+    procedure, pass(sv) :: default => d_invt_solver_default
+  end type amg_d_invt_solver_type
+
+  private :: d_invt_solver_default
+
+
+  interface
+    subroutine amg_d_invt_solver_clone(sv,svout,info)
+      import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat, &
+       & amg_d_base_solver_type, psb_dpk_, amg_d_invt_solver_type, psb_ipk_
+      Implicit None
+      class(amg_d_invt_solver_type), intent(inout)              :: sv
+      class(amg_d_base_solver_type), allocatable, intent(inout) :: svout
+      integer(psb_ipk_), intent(out)                            :: info
+    end subroutine amg_d_invt_solver_clone
+  end interface
+
+  interface
+    subroutine amg_d_invt_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat, &
+       & psb_d_vect_type, psb_d_base_vect_type, psb_dpk_,&
+       & amg_d_invt_solver_type, psb_i_base_vect_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      type(psb_dspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a
+      class(amg_d_invt_solver_type), intent(inout)        :: sv
+      integer(psb_ipk_), intent(out)                      :: info
+      type(psb_dspmat_type), intent(in), target, optional :: b
+      class(psb_d_base_sparse_mat), intent(in), optional  :: amold
+      class(psb_d_base_vect_type), intent(in), optional   :: vmold
+      class(psb_i_base_vect_type), intent(in), optional  :: imold
+    end subroutine amg_d_invt_solver_bld
+  end interface
+
+  interface
+    subroutine amg_d_invt_solver_check(sv,info)
+      import :: amg_d_invt_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_d_invt_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_d_invt_solver_check
+  end interface
+
+  interface
+    subroutine amg_d_invt_solver_cseti(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat,  psb_ipk_,&
+           & psb_d_vect_type, psb_d_base_vect_type, psb_dpk_, amg_d_invt_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_d_invt_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_d_invt_solver_cseti
+  end interface
+
+  interface
+    subroutine amg_d_invt_solver_csetr(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_dspmat_type,  psb_d_base_sparse_mat,  psb_ipk_,&
+           & psb_d_vect_type, psb_d_base_vect_type, psb_dpk_, amg_d_invt_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_d_invt_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      real(psb_dpk_), intent(in)                   :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_d_invt_solver_csetr
+  end interface
+
+  interface
+    subroutine amg_d_invt_solver_descr(sv,info,iout,coarse)
+      import :: psb_dpk_, amg_d_invt_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_d_invt_solver_type), intent(in) :: sv
+      integer(psb_ipk_), intent(out)            :: info
+      integer(psb_ipk_), intent(in), optional   :: iout
+      logical, intent(in), optional             :: coarse
+
+    end subroutine amg_d_invt_solver_descr
+  end interface
+
+  interface
+    subroutine amg_d_invt_solver_setr(sv,what,val,info)
+      import :: amg_d_invt_solver_type, psb_dpk_, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_d_invt_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      real(psb_dpk_), intent(in)                   :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_d_invt_solver_setr
+  end interface
+
+  interface
+    subroutine amg_d_invt_solver_seti(sv,what,val,info)
+      import :: amg_d_invt_solver_type, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_d_invt_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine
+  end interface
+
+contains
+
+  subroutine d_invt_solver_default(sv)
+
+    !use psb_base_mod
+
+    Implicit None
+
+    ! Arguments
+    class(amg_d_invt_solver_type), intent(inout) :: sv
+
+    sv%fill_in    = 0
+    sv%inv_fill   = 0
+    sv%thresh     = dzero
+    sv%inv_thresh = dzero
+
+    return
+  end subroutine d_invt_solver_default
+
+end module amg_d_invt_solver

amgprec/amg_d_prec_mod.f90

@@ -1,15 +1,15 @@
-!   
-!   
+!
+!
 !                             AMG4PSBLAS version 1.0
 !    Algebraic Multigrid Package
 !               based on PSBLAS (Parallel Sparse BLAS version 3.5)
-!    
-!    (C) Copyright 2020 
-!  
-!        Salvatore Filippone  
-!        Pasqua D'Ambra   
-!        Fabio Durastante        
-!   
+!
+!    (C) Copyright 2020
+!
+!        Salvatore Filippone
+!        Pasqua D'Ambra
+!        Fabio Durastante
+!
 !    Redistribution and use in source and binary forms, with or without
 !    modification, are permitted provided that the following conditions
 !    are met:
@@ -21,7 +21,7 @@
 !      3. The name of the AMG4PSBLAS group or the names of its contributors may
 !         not be used to endorse or promote products derived from this
 !         software without specific written permission.
-!   
+!
 !    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 !    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 !    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
@@ -33,8 +33,8 @@
 !    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 !    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 !    POSSIBILITY OF SUCH DAMAGE.
-!   
-!  
+!
+!
 ! File: amg_d_prec_mod.f90
 !
 ! Module: amg_d_prec_mod
@@ -52,6 +52,9 @@ module amg_d_prec_mod
   use amg_d_l1_diag_solver
   use amg_d_ilu_solver
   use amg_d_gs_solver
+  use amg_d_ainv_solver
+  use amg_d_invk_solver
+  use amg_d_invt_solver
 
   interface amg_precset
     module procedure amg_d_iprecsetsm, amg_d_iprecsetsv, &
@@ -78,7 +81,7 @@ module amg_d_prec_mod
       ! !$  character, intent(in), optional         :: upd
     end subroutine amg_d_extprol_bld
   end interface amg_extprol_bld
-  
+
 contains
 
   subroutine amg_d_iprecsetsm(p,val,info,pos)
@@ -108,7 +111,7 @@ contains
 
   subroutine amg_d_cprecseti(p,what,val,info,pos)
     type(amg_dprec_type), intent(inout)   :: p
-    character(len=*), intent(in)            :: what 
+    character(len=*), intent(in)            :: what
     integer(psb_ipk_), intent(in)           :: val
     integer(psb_ipk_), intent(out)          :: info
     character(len=*), optional, intent(in)      :: pos
@@ -118,7 +121,7 @@ contains
 
   subroutine amg_d_cprecsetr(p,what,val,info,pos)
     type(amg_dprec_type), intent(inout)   :: p
-    character(len=*), intent(in)            :: what 
+    character(len=*), intent(in)            :: what
     real(psb_dpk_), intent(in)             :: val
     integer(psb_ipk_), intent(out)          :: info
     character(len=*), optional, intent(in)      :: pos
@@ -128,7 +131,7 @@ contains
 
   subroutine amg_d_cprecsetc(p,what,val,info,pos)
     type(amg_dprec_type), intent(inout)   :: p
-    character(len=*), intent(in)            :: what 
+    character(len=*), intent(in)            :: what
     character(len=*), intent(in)            :: val
     integer(psb_ipk_), intent(out)          :: info
     character(len=*), optional, intent(in)      :: pos

amgprec/amg_d_prec_type.f90

@@ -1,15 +1,15 @@
-!  
-!   
+!
+!
 !                             AMG4PSBLAS version 1.0
 !    Algebraic Multigrid Package
 !               based on PSBLAS (Parallel Sparse BLAS version 3.5)
-!    
-!    (C) Copyright 2020 
-!  
-!        Salvatore Filippone  
-!        Pasqua D'Ambra   
-!        Fabio Durastante        
-!   
+!
+!    (C) Copyright 2020
+!
+!        Salvatore Filippone
+!        Pasqua D'Ambra
+!        Fabio Durastante
+!
 !    Redistribution and use in source and binary forms, with or without
 !    modification, are permitted provided that the following conditions
 !    are met:
@@ -21,7 +21,7 @@
 !      3. The name of the AMG4PSBLAS group or the names of its contributors may
 !         not be used to endorse or promote products derived from this
 !         software without specific written permission.
-!   
+!
 !    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 !    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 !    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
@@ -33,21 +33,21 @@
 !    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 !    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 !    POSSIBILITY OF SUCH DAMAGE.
-!   
-!  
+!
+!
 ! File: amg_d_prec_type.f90
 !
 ! Module: amg_d_prec_type
 !
-!  This module defines: 
+!  This module defines:
 !  - the amg_d_prec_type data structure containing the preconditioner and related
 !    data structures;
 !
 !  It contains routines for
-!  - Building and applying; 
+!  - Building and applying;
 !  - checking if the preconditioner is correctly defined;
 !  - printing a	description of the preconditioner;
-!  - deallocating the preconditioner data structure.  
+!  - deallocating the preconditioner data structure.
 !
 
 module amg_d_prec_type
@@ -70,25 +70,25 @@ module amg_d_prec_type
   !  It consists of an array of 'one-level' intermediate data structures
   !  of type amg_donelev_type, each containing the information needed to apply
   !  the smoothing and the coarse-space correction at a generic level. RT is the
-  !  real data type, i.e. S for both S and C, and D for both D and Z. 
+  !  real data type, i.e. S for both S and C, and D for both D and Z.
   !
   !  type amg_dprec_type
-  !    type(amg_donelev_type), allocatable :: precv(:) 
+  !    type(amg_donelev_type), allocatable :: precv(:)
   !  end type amg_dprec_type
-  ! 
+  !
   !  Note that the levels are numbered in increasing order starting from
   !  the level 1 as the finest one, and the number of levels is given by
-  !  size(precv(:))  which is the id of the coarsest level. 
+  !  size(precv(:))  which is the id of the coarsest level.
   !  In the multigrid literature many authors number the levels in the opposite
   !  order, with level 0 being the id of the coarsest level.
   !
   !
   integer, parameter, private :: wv_size_=4
-  
+
   type, extends(psb_dprec_type)        :: amg_dprec_type
     type(amg_daggr_data)                 :: ag_data
     !
-    ! Number of outer sweeps. Sometimes  2 V-cycles may be better than 1 W-cycle. 
+    ! Number of outer sweeps. Sometimes  2 V-cycles may be better than 1 W-cycle.
     !
     integer(psb_ipk_)                  :: outer_sweeps = 1
     !
@@ -97,11 +97,11 @@ module amg_d_prec_type
     ! to keep track against what is put later in the multilevel array
     !
     integer(psb_ipk_)                  :: coarse_solver = -1
-    
+
     !
     ! The multilevel hierarchy
     !
-    type(amg_d_onelev_type), allocatable :: precv(:) 
+    type(amg_d_onelev_type), allocatable :: precv(:)
   contains
     procedure, pass(prec)               :: psb_d_apply2_vect => amg_d_apply2_vect
     procedure, pass(prec)               :: psb_d_apply1_vect => amg_d_apply1_vect
@@ -157,7 +157,7 @@ module amg_d_prec_type
   interface amg_precdescr
     subroutine amg_dfile_prec_descr(prec,iout,root)
       import :: amg_dprec_type, psb_ipk_
-      implicit none 
+      implicit none
       ! Arguments
       class(amg_dprec_type), intent(in)      :: prec
       integer(psb_ipk_), intent(in), optional :: iout
@@ -211,7 +211,7 @@ module amg_d_prec_type
     end subroutine amg_dprecaply1
   end interface
 
-  interface 
+  interface
     subroutine amg_dprecsetsm(prec,val,info,ilev,ilmax,pos)
       import :: psb_dspmat_type, psb_desc_type, psb_dpk_, &
            & amg_dprec_type, amg_d_base_smoother_type, psb_ipk_
@@ -243,7 +243,7 @@ module amg_d_prec_type
       import :: psb_dspmat_type, psb_desc_type, psb_dpk_, &
            & amg_dprec_type, psb_ipk_
       class(amg_dprec_type), intent(inout)   :: prec
-      character(len=*), intent(in)             :: what 
+      character(len=*), intent(in)             :: what
       integer(psb_ipk_), intent(in)            :: val
       integer(psb_ipk_), intent(out)           :: info
       integer(psb_ipk_), optional, intent(in)  :: ilev,ilmax,idx
@@ -253,7 +253,7 @@ module amg_d_prec_type
       import :: psb_dspmat_type, psb_desc_type, psb_dpk_, &
            & amg_dprec_type, psb_ipk_
       class(amg_dprec_type), intent(inout)   :: prec
-      character(len=*), intent(in)             :: what 
+      character(len=*), intent(in)             :: what
       real(psb_dpk_), intent(in)                :: val
       integer(psb_ipk_), intent(out)           :: info
       integer(psb_ipk_), optional, intent(in)  :: ilev,ilmax,idx
@@ -263,7 +263,7 @@ module amg_d_prec_type
       import :: psb_dspmat_type, psb_desc_type, psb_dpk_, &
            & amg_dprec_type, psb_ipk_
       class(amg_dprec_type), intent(inout)   :: prec
-      character(len=*), intent(in)             :: what 
+      character(len=*), intent(in)             :: what
       character(len=*), intent(in)             :: string
       integer(psb_ipk_), intent(out)           :: info
       integer(psb_ipk_), optional, intent(in)  :: ilev,ilmax,idx
@@ -341,28 +341,28 @@ module amg_d_prec_type
       !      character, intent(in),optional             :: upd
     end subroutine amg_d_smoothers_bld
   end interface amg_smoothers_bld
-  
+
 contains
   !
   ! Function returning a pointer to the smoother
   !
   function amg_d_get_smootherp(prec,ilev) result(val)
-    implicit none 
+    implicit none
     class(amg_dprec_type), target, intent(in) :: prec
     integer(psb_ipk_), optional                 :: ilev
     class(amg_d_base_smoother_type), pointer  :: val
     integer(psb_ipk_)        :: ilev_
-    
+
     val => null()
-    if (present(ilev)) then 
+    if (present(ilev)) then
       ilev_ = ilev
     else
-      ! What is a good default? 
+      ! What is a good default?
       ilev_ = 1
     end if
-    if (allocated(prec%precv)) then 
-      if ((1<=ilev_).and.(ilev_<=size(prec%precv))) then 
-        if (allocated(prec%precv(ilev_)%sm)) then 
+    if (allocated(prec%precv)) then
+      if ((1<=ilev_).and.(ilev_<=size(prec%precv))) then
+        if (allocated(prec%precv(ilev_)%sm)) then
           val => prec%precv(ilev_)%sm
         end if
       end if
@@ -372,23 +372,23 @@ contains
   ! Function returning a pointer to the solver
   !
   function amg_d_get_solverp(prec,ilev) result(val)
-    implicit none 
+    implicit none
     class(amg_dprec_type), target, intent(in) :: prec
     integer(psb_ipk_), optional                 :: ilev
     class(amg_d_base_solver_type), pointer  :: val
     integer(psb_ipk_)        :: ilev_
-    
+
     val => null()
-    if (present(ilev)) then 
+    if (present(ilev)) then
       ilev_ = ilev
     else
-      ! What is a good default? 
+      ! What is a good default?
       ilev_ = 1
     end if
-    if (allocated(prec%precv)) then 
-      if ((1<=ilev_).and.(ilev_<=size(prec%precv))) then 
-        if (allocated(prec%precv(ilev_)%sm)) then 
-          if (allocated(prec%precv(ilev_)%sm%sv)) then 
+    if (allocated(prec%precv)) then
+      if ((1<=ilev_).and.(ilev_<=size(prec%precv))) then
+        if (allocated(prec%precv(ilev_)%sm)) then
+          if (allocated(prec%precv(ilev_)%sm%sv)) then
             val => prec%precv(ilev_)%sm%sv
           end if
         end if
@@ -399,25 +399,25 @@ contains
   ! Function returning the size of the precv(:) array
   !
   function amg_d_get_nlevs(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_dprec_type), intent(in) :: prec
     integer(psb_ipk_) :: val
     val = 0
-    if (allocated(prec%precv)) then 
+    if (allocated(prec%precv)) then
       val = size(prec%precv)
     end if
   end function amg_d_get_nlevs
   !
   ! Function returning the size of the amg_prec_type data structure
-  ! in bytes or in number of nonzeros of the operator(s) involved. 
+  ! in bytes or in number of nonzeros of the operator(s) involved.
   !
   function amg_d_get_nzeros(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_dprec_type), intent(in) :: prec
     integer(psb_epk_) :: val
     integer(psb_ipk_)        :: i
     val = 0
-    if (allocated(prec%precv)) then 
+    if (allocated(prec%precv)) then
       do i=1, size(prec%precv)
         val = val + prec%precv(i)%get_nzeros()
       end do
@@ -425,13 +425,13 @@ contains
   end function amg_d_get_nzeros
 
   function amg_dprec_sizeof(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_dprec_type), intent(in) :: prec
     integer(psb_epk_) :: val
     integer(psb_ipk_)        :: i
     val = 0
     val = val + psb_sizeof_ip
-    if (allocated(prec%precv)) then 
+    if (allocated(prec%precv)) then
       do i=1, size(prec%precv)
         val = val + prec%precv(i)%sizeof()
       end do
@@ -444,40 +444,40 @@ contains
   ! various level to the nonzeroes at the fine level
   ! (original matrix)
   !
-  
+
   function amg_d_get_compl(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_dprec_type), intent(in) :: prec
     real(psb_dpk_)  :: val
-    
+
     val = prec%ag_data%op_complexity
 
   end function amg_d_get_compl
-  
-  subroutine amg_d_cmp_compl(prec) 
 
-    implicit none 
+  subroutine amg_d_cmp_compl(prec)
+
+    implicit none
     class(amg_dprec_type), intent(inout) :: prec
-    
+
     real(psb_dpk_) :: num, den, nmin
     type(psb_ctxt_type) :: ctxt
-    integer(psb_ipk_)   :: il 
+    integer(psb_ipk_)   :: il
 
     num = -done
     den = done
     ctxt = prec%ctxt
-    if (allocated(prec%precv)) then 
+    if (allocated(prec%precv)) then
       il  = 1
       num = prec%precv(il)%base_a%get_nzeros()
       if (num >= dzero) then
-        den = num 
+        den = num
         do il=2,size(prec%precv)
           num = num + max(0,prec%precv(il)%base_a%get_nzeros())
         end do
       end if
     end if
     nmin = num
-    call psb_min(ctxt,nmin) 
+    call psb_min(ctxt,nmin)
     if (nmin < dzero) then
       num = dzero
       den = done
@@ -487,25 +487,25 @@ contains
     end if
     prec%ag_data%op_complexity = num/den
   end subroutine amg_d_cmp_compl
-  
+
   !
   ! Average coarsening ratio
   !
-  
+
   function amg_d_get_avg_cr(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_dprec_type), intent(in) :: prec
     real(psb_dpk_)  :: val
-    
+
     val = prec%ag_data%avg_cr
 
   end function amg_d_get_avg_cr
-  
-  subroutine amg_d_cmp_avg_cr(prec) 
 
-    implicit none 
+  subroutine amg_d_cmp_avg_cr(prec)
+
+    implicit none
     class(amg_dprec_type), intent(inout) :: prec
-    
+
     real(psb_dpk_)    :: avgcr
     type(psb_ctxt_type) :: ctxt
     integer(psb_ipk_)   :: il, nl, iam, np
@@ -519,12 +519,12 @@ contains
       do il=2,nl
         avgcr = avgcr + max(dzero,prec%precv(il)%szratio)
       end do
-      avgcr = avgcr / (nl-1)      
+      avgcr = avgcr / (nl-1)
     end if
-    call psb_sum(ctxt,avgcr) 
+    call psb_sum(ctxt,avgcr)
     prec%ag_data%avg_cr = avgcr/np
   end subroutine amg_d_cmp_avg_cr
-  
+
   !
   ! Subroutines: amg_Tprec_free
   ! Version: real
@@ -538,74 +538,74 @@ contains
   !             error code.
   !
   subroutine amg_dprecfree(p,info)
-  
+
     implicit none
-    
+
     ! Arguments
     type(amg_dprec_type), intent(inout) :: p
     integer(psb_ipk_), intent(out)        :: info
-    
+
     ! Local variables
     integer(psb_ipk_)   :: me,err_act,i
     character(len=20)   :: name
-    
+
     info=psb_success_
     name = 'amg_dprecfree'
     call psb_erractionsave(err_act)
     if (psb_errstatus_fatal()) then
       info = psb_err_internal_error_; return
     end if
-    
+
     me=-1
-    
+
     call p%free(info)
 
-    
+
     return
-    
+
   end subroutine amg_dprecfree
 
   subroutine amg_d_prec_free(prec,info)
-    
+
     implicit none
-    
+
     ! Arguments
     class(amg_dprec_type), intent(inout) :: prec
     integer(psb_ipk_), intent(out)        :: info
-    
+
     ! Local variables
     integer(psb_ipk_)   :: me,err_act,i
     character(len=20)   :: name
-    
+
     info=psb_success_
     name = 'amg_dprecfree'
     call psb_erractionsave(err_act)
     if (psb_errstatus_fatal()) then
       info = psb_err_internal_error_; goto 9999
     end if
-    
+
     me=-1
-    if (allocated(prec%precv)) then 
-      do i=1,size(prec%precv) 
+    if (allocated(prec%precv)) then
+      do i=1,size(prec%precv)
         call prec%precv(i)%free(info)
       end do
       deallocate(prec%precv,stat=info)
     end if
     call psb_erractionrestore(err_act)
     return
-    
+
 9999 call psb_error_handler(err_act)
     return
-    
+
   end subroutine amg_d_prec_free
 
-  
+
 
   !
-  ! Top level methods. 
+  ! Top level methods.
   !
   subroutine amg_d_apply2_vect(prec,x,y,desc_data,info,trans,work)
-    implicit none 
+    implicit none
     type(psb_desc_type),intent(in)        :: desc_data
     class(amg_dprec_type), intent(inout)  :: prec
     type(psb_d_vect_type),intent(inout)   :: x
@@ -618,13 +618,13 @@ contains
 
     call psb_erractionsave(err_act)
 
-    select type(prec) 
+    select type(prec)
     type is (amg_dprec_type)
       call amg_precapply(prec,x,y,desc_data,info,trans,work)
     class default
       info = psb_err_missing_override_method_
       call psb_errpush(info,name)
-      goto 9999 
+      goto 9999
     end select
 
     call psb_erractionrestore(err_act)
@@ -636,7 +636,7 @@ contains
   end subroutine amg_d_apply2_vect
 
   subroutine amg_d_apply1_vect(prec,x,desc_data,info,trans,work)
-    implicit none 
+    implicit none
     type(psb_desc_type),intent(in)          :: desc_data
     class(amg_dprec_type), intent(inout)  :: prec
     type(psb_d_vect_type),intent(inout)   :: x
@@ -648,13 +648,13 @@ contains
 
     call psb_erractionsave(err_act)
 
-    select type(prec) 
+    select type(prec)
     type is (amg_dprec_type)
       call amg_precapply(prec,x,desc_data,info,trans,work)
     class default
       info = psb_err_missing_override_method_
       call psb_errpush(info,name)
-      goto 9999 
+      goto 9999
     end select
 
     call psb_erractionrestore(err_act)
@@ -667,7 +667,7 @@ contains
 
 
   subroutine amg_d_apply2v(prec,x,y,desc_data,info,trans,work)
-    implicit none 
+    implicit none
     type(psb_desc_type),intent(in)    :: desc_data
     class(amg_dprec_type), intent(inout) :: prec
     real(psb_dpk_),intent(inout)      :: x(:)
@@ -680,13 +680,13 @@ contains
 
     call psb_erractionsave(err_act)
 
-    select type(prec) 
+    select type(prec)
     type is (amg_dprec_type)
       call amg_precapply(prec,x,y,desc_data,info,trans,work)
     class default
       info = psb_err_missing_override_method_
       call psb_errpush(info,name)
-      goto 9999 
+      goto 9999
     end select
 
     call psb_erractionrestore(err_act)
@@ -698,7 +698,7 @@ contains
   end subroutine amg_d_apply2v
 
   subroutine amg_d_apply1v(prec,x,desc_data,info,trans)
-    implicit none 
+    implicit none
     type(psb_desc_type),intent(in)    :: desc_data
     class(amg_dprec_type), intent(inout) :: prec
     real(psb_dpk_),intent(inout)      :: x(:)
@@ -709,13 +709,13 @@ contains
 
     call psb_erractionsave(err_act)
 
-    select type(prec) 
+    select type(prec)
     type is (amg_dprec_type)
       call amg_precapply(prec,x,desc_data,info,trans)
     class default
       info = psb_err_missing_override_method_
       call psb_errpush(info,name)
-      goto 9999 
+      goto 9999
     end select
 
     call psb_erractionrestore(err_act)
@@ -730,8 +730,8 @@ contains
   subroutine amg_d_dump(prec,info,istart,iend,iproc,prefix,head,&
        & ac,rp,smoother,solver,tprol,&
        & global_num)
-    
-    implicit none 
+
+    implicit none
     class(amg_dprec_type), intent(in)     :: prec
     integer(psb_ipk_), intent(out)          :: info
     integer(psb_ipk_), intent(in), optional :: istart, iend, iproc
@@ -742,27 +742,26 @@ contains
     integer(psb_ipk_)   :: iam, np, iproc_
     character(len=80)   :: prefix_
     character(len=120)  :: fname ! len should be at least 20 more than
-    !  len of prefix_ 
+    !  len of prefix_
 
     info = 0
     ctxt = prec%ctxt
     call psb_info(ctxt,iam,np)
-    
     iln = size(prec%precv)
-    if (present(istart)) then 
+    if (present(istart)) then
       il1 = max(1,istart)
     else
       il1 = min(2,iln)
     end if
-    if (present(iend)) then 
+    if (present(iend)) then
       iln = min(iln, iend)
     end if
     iproc_ = -1
-    if (present(iproc)) then 
+    if (present(iproc)) then
       iproc_ = iproc
     end if
 
-    if ((iproc_ == -1).or.(iproc_==iam)) then 
+    if ((iproc_ == -1).or.(iproc_==iam)) then
       do lev=il1, iln
         call prec%precv(lev)%dump(lev,info,prefix=prefix,head=head,&
              & ac=ac,smoother=smoother,solver=solver,rp=rp,tprol=tprol, &
@@ -773,7 +772,7 @@ contains
 
   subroutine amg_d_cnv(prec,info,amold,vmold,imold)
 
-    implicit none 
+    implicit none
     class(amg_dprec_type), intent(inout) :: prec
     integer(psb_ipk_), intent(out)       :: info
     class(psb_d_base_sparse_mat), intent(in), optional :: amold
@@ -781,7 +780,7 @@ contains
     class(psb_i_base_vect_type), intent(in), optional  :: imold
 
     integer(psb_ipk_) :: i
-    
+
     info = psb_success_
     if (allocated(prec%precv)) then
       do i=1,size(prec%precv)
@@ -789,24 +788,24 @@ contains
              & call prec%precv(i)%cnv(info,amold=amold,vmold=vmold,imold=imold)
       end do
     end if
-    
+
   end subroutine amg_d_cnv
 
   subroutine amg_d_clone(prec,precout,info)
 
-    implicit none 
+    implicit none
     class(amg_dprec_type), intent(inout) :: prec
     class(psb_dprec_type), intent(inout) :: precout
     integer(psb_ipk_), intent(out)       :: info
-    
+
     call precout%free(info)
-    if (info == 0) call amg_d_inner_clone(prec,precout,info) 
+    if (info == 0) call amg_d_inner_clone(prec,precout,info)
 
   end subroutine amg_d_clone
 
   subroutine amg_d_inner_clone(prec,precout,info)
 
-    implicit none 
+    implicit none
     class(amg_dprec_type), intent(inout)         :: prec
     class(psb_dprec_type), target, intent(inout) :: precout
     integer(psb_ipk_), intent(out)             :: info
@@ -821,17 +820,17 @@ contains
       pout%ctxt          = prec%ctxt
       pout%ag_data       = prec%ag_data
       pout%outer_sweeps  = prec%outer_sweeps
-      if (allocated(prec%precv)) then 
-        ln = size(prec%precv) 
+      if (allocated(prec%precv)) then
+        ln = size(prec%precv)
         allocate(pout%precv(ln),stat=info)
         if (info /= psb_success_) goto 9999
-        if (ln >= 1) then 
+        if (ln >= 1) then
           call prec%precv(1)%clone(pout%precv(1),info)
         end if
         do lev=2, ln
           if (info /= psb_success_) exit
           call prec%precv(lev)%clone(pout%precv(lev),info)
-          if (info == psb_success_) then 
+          if (info == psb_success_) then
             pout%precv(lev)%base_a       => pout%precv(lev)%ac
             pout%precv(lev)%base_desc    => pout%precv(lev)%desc_ac
             pout%precv(lev)%linmap%p_desc_U => pout%precv(lev-1)%base_desc
@@ -842,7 +841,7 @@ contains
       if (allocated(prec%precv(1)%wrk)) &
            & call pout%allocate_wrk(info,vmold=prec%precv(1)%wrk%vx2l%v)
 
-    class default 
+    class default
       write(0,*) 'Error: wrong out type'
       info = psb_err_invalid_input_
     end select
@@ -854,14 +853,14 @@ contains
     implicit none
     class(amg_dprec_type), intent(inout) :: prec
     class(amg_dprec_type), intent(inout), target :: b
-    integer(psb_ipk_), intent(out) :: info 
+    integer(psb_ipk_), intent(out) :: info
     integer(psb_ipk_) :: i
-    
-    if (same_type_as(prec,b)) then 
-      if (allocated(b%precv)) then 
+
+    if (same_type_as(prec,b)) then
+      if (allocated(b%precv)) then
         ! This might not be required if FINAL procedures are available.
         call b%free(info)
-        if (info /= psb_success_) then 
+        if (info /= psb_success_) then
           !?????
 !!$        return
         endif
@@ -869,7 +868,7 @@ contains
       b%ctxt         = prec%ctxt
       b%ag_data       = prec%ag_data
       b%outer_sweeps  = prec%outer_sweeps
-            
+
       call move_alloc(prec%precv,b%precv)
       ! Fix the pointers except on level 1.
       do i=2, size(b%precv)
@@ -878,7 +877,7 @@ contains
         b%precv(i)%linmap%p_desc_U => b%precv(i-1)%base_desc
         b%precv(i)%linmap%p_desc_V => b%precv(i)%base_desc
       end do
-            
+
     else
       write(0,*) 'Warning: PREC%move_alloc onto different type?'
       info = psb_err_internal_error_
@@ -888,7 +887,7 @@ contains
   subroutine amg_d_allocate_wrk(prec,info,vmold,desc)
     use psb_base_mod
     implicit none
-    
+
     ! Arguments
     class(amg_dprec_type), intent(inout) :: prec
     integer(psb_ipk_), intent(out)        :: info
@@ -896,37 +895,37 @@ contains
     !
     ! In MLD the DESC optional argument is ignored, since
     ! the necessary info is contained in the various entries of the
-    ! PRECV component. 
+    ! PRECV component.
     type(psb_desc_type), intent(in), optional  :: desc
-    
+
     ! Local variables
     integer(psb_ipk_)   :: me,err_act,i,j,level,nlev, nc2l
     character(len=20)   :: name
-    
+
     info=psb_success_
     name = 'amg_d_allocate_wrk'
     call psb_erractionsave(err_act)
     if (psb_errstatus_fatal()) then
       info = psb_err_internal_error_; goto 9999
     end if
-    nlev   = size(prec%precv)  
+    nlev   = size(prec%precv)
     level = 1
     do level = 1, nlev
       call prec%precv(level)%allocate_wrk(info,vmold=vmold)
-      if (psb_errstatus_fatal()) then 
+      if (psb_errstatus_fatal()) then
         nc2l = prec%precv(level)%base_desc%get_local_cols()
         info=psb_err_alloc_request_
         call psb_errpush(info,name,i_err=(/2*nc2l/), a_err='real(psb_dpk_)')
-        goto 9999      
+        goto 9999
       end if
     end do
 
     call psb_erractionrestore(err_act)
     return
-    
+
 9999 call psb_error_handler(err_act)
     return
-    
+
   end subroutine amg_d_allocate_wrk
 
   subroutine amg_d_free_wrk(prec,info)
@@ -948,13 +947,13 @@ contains
       info = psb_err_internal_error_; goto 9999
     end if
 
-    if (allocated(prec%precv)) then 
-      nlev   = size(prec%precv)  
+    if (allocated(prec%precv)) then
+      nlev   = size(prec%precv)
       do level = 1, nlev
         call prec%precv(level)%free_wrk(info)
       end do
     end if
-    
+
     call psb_erractionrestore(err_act)
     return
 
@@ -966,7 +965,7 @@ contains
   function amg_d_is_allocated_wrk(prec) result(res)
     use psb_base_mod
     implicit none
-    
+
     ! Arguments
     class(amg_dprec_type), intent(in) :: prec
     logical :: res
@@ -974,7 +973,7 @@ contains
     res = .false.
     if (.not.allocated(prec%precv)) return
     res = allocated(prec%precv(1)%wrk)
-     
+
   end function amg_d_is_allocated_wrk
 
 end module amg_d_prec_type

amgprec/amg_s_ainv_solver.F90

@@ -0,0 +1,321 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+!
+!
+!
+!
+module amg_s_ainv_solver
+
+  use amg_s_base_ainv_mod
+  use psb_base_mod, only : psb_d_vect_type
+
+  type, extends(amg_s_base_ainv_solver_type) :: amg_s_ainv_solver_type
+    !
+    !  Compute an approximate factorization
+    !      A^-1 = Z D^-1 W^T
+    !  Note that here W is going to be transposed explicitly,
+    !  so that the component w will in the end contain W^T.
+    !
+    integer(psb_ipk_)   :: alg, fill_in
+    real(psb_spk_)      :: thresh
+  contains
+    procedure, pass(sv) :: check   => amg_s_ainv_solver_check
+    procedure, pass(sv) :: build   => amg_s_ainv_solver_bld
+    procedure, pass(sv) :: clone   => amg_s_ainv_solver_clone
+    procedure, pass(sv) :: cseti   => amg_s_ainv_solver_cseti
+    procedure, pass(sv) :: csetc   => amg_s_ainv_solver_csetc
+    procedure, pass(sv) :: csetr   => amg_s_ainv_solver_csetr
+    procedure, pass(sv) :: seti    => amg_s_ainv_solver_seti
+    procedure, pass(sv) :: setc    => amg_s_ainv_solver_setc
+    procedure, pass(sv) :: setr    => amg_s_ainv_solver_setr
+    generic, public :: set => seti, setr, setc
+    procedure, pass(sv) :: descr   => amg_s_ainv_solver_descr
+    procedure, pass(sv) :: default => s_ainv_solver_default
+    procedure, nopass   :: stringval  => s_ainv_stringval
+    procedure, nopass   :: algname => s_ainv_algname
+  end type amg_s_ainv_solver_type
+
+
+  private :: s_ainv_stringval, s_ainv_solver_default, &
+       &  s_ainv_algname
+
+  interface
+    subroutine amg_s_ainv_solver_clone(sv,svout,info)
+      import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat, &
+       & amg_s_base_solver_type, psb_dpk_, amg_s_ainv_solver_type, psb_ipk_
+      Implicit None
+      class(amg_s_ainv_solver_type), intent(inout)              :: sv
+      class(amg_s_base_solver_type), allocatable, intent(inout) :: svout
+      integer(psb_ipk_), intent(out)                            :: info
+    end subroutine amg_s_ainv_solver_clone
+  end interface
+
+
+  interface
+    subroutine amg_s_ainv_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat, &
+       & psb_d_vect_type, psb_s_base_vect_type, psb_dpk_,&
+       & amg_s_ainv_solver_type, psb_i_base_vect_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      type(psb_sspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a
+      class(amg_s_ainv_solver_type), intent(inout)        :: sv
+      integer(psb_ipk_), intent(out)                      :: info
+      type(psb_sspmat_type), intent(in), target, optional :: b
+      class(psb_s_base_sparse_mat), intent(in), optional  :: amold
+      class(psb_s_base_vect_type), intent(in), optional   :: vmold
+      class(psb_i_base_vect_type), intent(in), optional   :: imold
+    end subroutine amg_s_ainv_solver_bld
+  end interface
+
+  interface
+    subroutine amg_s_ainv_solver_check(sv,info)
+      import :: psb_dpk_, amg_s_ainv_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_s_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_s_ainv_solver_check
+  end interface
+
+  interface
+    subroutine amg_s_ainv_solver_cseti(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat, psb_ipk_,&
+           & psb_d_vect_type, psb_s_base_vect_type, psb_dpk_, amg_s_ainv_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_s_ainv_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_s_ainv_solver_cseti
+  end interface
+
+
+  interface
+    subroutine amg_s_ainv_solver_csetc(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat, psb_ipk_,&
+           & psb_d_vect_type, psb_s_base_vect_type, psb_dpk_, amg_s_ainv_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_s_ainv_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      character(len=*), intent(in)                 :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_s_ainv_solver_csetc
+  end interface
+
+  interface
+    subroutine amg_s_ainv_solver_csetr(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat,  psb_ipk_,&
+           & psb_d_vect_type, psb_s_base_vect_type, psb_spk_, amg_s_ainv_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_s_ainv_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      real(psb_spk_), intent(in)                   :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_s_ainv_solver_csetr
+  end interface
+
+  interface
+    subroutine amg_s_ainv_solver_setc(sv,what,val,info)
+      import :: amg_s_ainv_solver_type, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_s_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      character(len=*), intent(in)                 :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_s_ainv_solver_setc
+  end interface
+
+  interface
+    subroutine amg_s_ainv_solver_seti(sv,what,val,info)
+      import :: amg_s_ainv_solver_type, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_s_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_s_ainv_solver_seti
+  end interface
+
+  interface
+    subroutine amg_s_ainv_solver_setr(sv,what,val,info)
+      import :: amg_s_ainv_solver_type, psb_ipk_, psb_spk_
+      Implicit none
+      ! Arguments
+      class(amg_s_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      real(psb_spk_), intent(in)                   :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_s_ainv_solver_setr
+  end interface
+
+  interface
+    subroutine amg_s_ainv_solver_descr(sv,info,iout,coarse)
+      import :: psb_dpk_, amg_s_ainv_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_s_ainv_solver_type), intent(in) :: sv
+      integer(psb_ipk_), intent(out)            :: info
+      integer(psb_ipk_), intent(in), optional   :: iout
+      logical, intent(in), optional             :: coarse
+
+    end subroutine amg_s_ainv_solver_descr
+  end interface
+
+  interface  amg_ainv_bld
+    subroutine amg_s_ainv_bld(a,alg,fillin,thresh,wmat,d,zmat,desc,info,blck,iscale)
+      import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat, &
+           & psb_d_vect_type, psb_s_base_vect_type, psb_spk_, psb_ipk_
+      implicit none
+      type(psb_sspmat_type), intent(in), target   :: a
+      integer(psb_ipk_), intent(in)               :: fillin,alg
+      real(psb_spk_), intent(in)                  :: thresh
+      type(psb_sspmat_type), intent(inout)        :: wmat, zmat
+      real(psb_spk_), allocatable                 :: d(:)
+      Type(psb_desc_type), Intent(inout)          :: desc
+      integer(psb_ipk_), intent(out)              :: info
+      type(psb_sspmat_type), intent(in), optional :: blck
+      integer(psb_ipk_), intent(in), optional     :: iscale
+    end subroutine amg_s_ainv_bld
+  end interface
+
+
+contains
+
+  subroutine s_ainv_solver_default(sv)
+
+    use psb_base_mod
+
+    Implicit None
+
+    ! Arguments
+    class(amg_s_ainv_solver_type), intent(inout) :: sv
+
+    sv%alg     = amg_ainv_llk_
+    sv%fill_in = 0
+    sv%thresh  = dzero
+
+    return
+  end subroutine s_ainv_solver_default
+
+  function is_positive_nz_min(ip) result(res)
+    implicit none
+    integer(psb_ipk_), intent(in) :: ip
+    logical             :: res
+
+    res = (ip >= 1)
+    return
+  end function is_positive_nz_min
+
+
+  function s_ainv_stringval(string) result(val)
+    use psb_base_mod, only : psb_ipk_,psb_toupper
+    implicit none
+  ! Arguments
+    character(len=*), intent(in) :: string
+    integer(psb_ipk_) :: val
+    character(len=*), parameter :: name='d_ainv_stringval'
+
+    select case(psb_toupper(trim(string)))
+    case('LLK')
+      val = amg_ainv_llk_
+    case('STAB-LLK')
+      val = amg_ainv_s_ft_llk_
+    case('SYM-LLK')
+      val = amg_ainv_s_llk_
+    case('MLK')
+      val = amg_ainv_mlk_
+#if defined(HAVE_TUMA_SAINV)
+    case('SAINV-TUMA')
+      val = amg_ainv_s_tuma_
+    case('LAINV-TUMA')
+      val = amg_ainv_l_tuma_
+#endif
+    case default
+      val  = amg_stringval(string)
+    end select
+  end function s_ainv_stringval
+
+
+  function s_ainv_algname(ialg) result(val)
+    integer(psb_ipk_), intent(in) :: ialg
+    character(len=40) :: val
+
+    character(len=*), parameter :: mlkname   = 'Left-looking, list merge '
+    character(len=*), parameter :: llkname   = 'Left-looking '
+    character(len=*), parameter :: stabllkname  = 'Stabilized Left-looking '
+    character(len=*), parameter :: sllkname  = 'Symmetric Left-looking '
+    character(len=*), parameter :: sainvname = 'SAINV (Benzi & Tuma) '
+    character(len=*), parameter :: lainvname = 'LAINV (Benzi & Tuma) '
+    character(len=*), parameter :: defname   = 'Unknown alg variant '
+
+    select case (ialg)
+    case(amg_ainv_mlk_)
+      val = mlkname
+    case(amg_ainv_llk_)
+      val = llkname
+    case(amg_ainv_s_llk_)
+      val = sllkname
+    case(amg_ainv_s_ft_llk_)
+      val = stabllkname
+#if defined(HAVE_TUMA_SAINV)
+    case(amg_ainv_s_tuma_ )
+      val = sainvname
+    case(amg_ainv_l_tuma_ )
+      val = lainvname
+#endif
+    case default
+      val = defname
+    end select
+
+  end function s_ainv_algname
+
+end module amg_s_ainv_solver

amgprec/amg_s_base_ainv_mod.f90

@@ -0,0 +1,199 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+module amg_s_base_ainv_mod
+
+  use amg_base_ainv_mod
+  use amg_s_base_solver_mod
+  use psb_s_ainv_tools_mod
+  use psb_base_mod, only : psb_s_vect_type, psb_spk_, psb_epk_
+
+
+
+  type, extends(amg_s_base_solver_type) :: amg_s_base_ainv_solver_type
+    !
+    !  Compute an approximate factorization
+    !      A^-1 = Z D^-1 W^T
+    !  Note that here W is going to be transposed explicitly,
+    !  so that the component w will in the end contain W^T.
+    !
+    type(psb_sspmat_type)       :: w, z
+    type(psb_s_vect_type)       :: dv
+    real(psb_spk_), allocatable :: d(:)
+
+  contains
+    procedure, pass(sv) :: cnv     => amg_s_base_ainv_solver_cnv
+    procedure, pass(sv) :: dump    => amg_s_base_ainv_solver_dmp
+    procedure, pass(sv) :: apply_v => amg_s_base_ainv_solver_apply_vect
+    procedure, pass(sv) :: apply_a => amg_s_base_ainv_solver_apply
+    procedure, pass(sv) :: free    => amg_s_base_ainv_solver_free
+    procedure, pass(sv) :: sizeof  => s_base_ainv_solver_sizeof
+    procedure, pass(sv) :: get_nzeros => s_base_ainv_get_nzeros
+    procedure, nopass   :: get_wrksz => s_base_ainv_get_wrksize
+    procedure, pass(sv) :: update_a => amg_s_base_ainv_update_a
+    generic, public     :: update => update_a
+  end type amg_s_base_ainv_solver_type
+
+  private ::  s_base_ainv_solver_sizeof, &
+       & s_base_ainv_get_nzeros, s_base_ainv_get_wrksize
+
+
+  interface
+    subroutine amg_s_base_ainv_solver_cnv(sv,info,amold,vmold,imold)
+      import :: psb_s_base_sparse_mat, psb_s_base_vect_type, psb_spk_, &
+       & amg_s_base_ainv_solver_type, psb_ipk_, psb_i_base_vect_type
+      Implicit None
+      ! Arguments
+      class(amg_s_base_ainv_solver_type), intent(inout)  :: sv
+      integer(psb_ipk_), intent(out)                     :: info
+      class(psb_s_base_sparse_mat), intent(in), optional :: amold
+      class(psb_s_base_vect_type), intent(in), optional  :: vmold
+      class(psb_i_base_vect_type), intent(in), optional  :: imold
+    end subroutine amg_s_base_ainv_solver_cnv
+  end interface
+
+  interface
+    subroutine amg_s_base_ainv_update_a(sv,x,desc_data,info)
+      import :: psb_desc_type, psb_spk_,amg_s_base_ainv_solver_type, psb_s_vect_type, psb_ipk_
+      type(psb_desc_type), intent(in)      :: desc_data
+      class(amg_s_base_ainv_solver_type), intent(inout) :: sv
+      real(psb_spk_),intent(in)            :: x(:)
+      integer(psb_ipk_), intent(out)       :: info
+    end subroutine amg_s_base_ainv_update_a
+  end interface
+
+  interface
+    subroutine amg_s_base_ainv_solver_apply(alpha,sv,x,beta,y,desc_data,&
+         & trans,work,info,init,initu)
+      import :: psb_desc_type, psb_spk_,amg_s_base_ainv_solver_type, psb_ipk_
+      type(psb_desc_type), intent(in)      :: desc_data
+      class(amg_s_base_ainv_solver_type), intent(inout) :: sv
+      real(psb_spk_),intent(inout)         :: x(:)
+      real(psb_spk_),intent(inout)         :: y(:)
+      real(psb_spk_),intent(in)            :: alpha,beta
+      character(len=1),intent(in)          :: trans
+      real(psb_spk_),target, intent(inout) :: work(:)
+      integer(psb_ipk_), intent(out)       :: info
+      character, intent(in), optional      :: init
+      real(psb_spk_),intent(inout), optional :: initu(:)
+    end subroutine amg_s_base_ainv_solver_apply
+  end interface
+
+  interface
+    subroutine amg_s_base_ainv_solver_apply_vect(alpha,sv,x,beta,y,desc_data,&
+         &  trans,work,wv,info,init,initu)
+      import :: psb_desc_type, psb_spk_,amg_s_base_ainv_solver_type, psb_s_vect_type, psb_ipk_
+      type(psb_desc_type), intent(in)      :: desc_data
+      class(amg_s_base_ainv_solver_type), intent(inout) :: sv
+      type(psb_s_vect_type),intent(inout)  :: x
+      type(psb_s_vect_type),intent(inout)  :: y
+      real(psb_spk_),intent(in)            :: alpha,beta
+      character(len=1),intent(in)          :: trans
+      real(psb_spk_),target, intent(inout) :: work(:)
+      type(psb_s_vect_type),intent(inout)  :: wv(:)
+      integer(psb_ipk_), intent(out)       :: info
+      character, intent(in), optional      :: init
+      type(psb_s_vect_type),intent(inout), optional   :: initu
+    end subroutine amg_s_base_ainv_solver_apply_vect
+  end interface
+
+
+  interface
+    subroutine amg_s_base_ainv_solver_free(sv,info)
+      import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat, &
+           & psb_s_vect_type, psb_s_base_vect_type, psb_spk_, amg_s_base_ainv_solver_type, psb_ipk_
+      Implicit None
+
+      ! Arguments
+      class(amg_s_base_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)                    :: info
+    end subroutine amg_s_base_ainv_solver_free
+  end interface
+
+  interface
+    subroutine amg_s_base_ainv_solver_dmp(sv,desc,level,info,prefix,head,solver,global_num)
+      import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat, &
+           & psb_s_vect_type, psb_s_base_vect_type, psb_spk_, amg_s_base_ainv_solver_type, psb_ipk_
+
+      implicit none
+      class(amg_s_base_ainv_solver_type), intent(in) :: sv
+      type(psb_desc_type), intent(in)        :: desc
+      integer(psb_ipk_), intent(in)          :: level
+      integer(psb_ipk_), intent(out)         :: info
+      character(len=*), intent(in), optional :: prefix, head
+      logical, optional, intent(in)    :: solver, global_num
+    end subroutine amg_s_base_ainv_solver_dmp
+  end interface
+
+contains
+
+  function s_base_ainv_get_nzeros(sv) result(val)
+    implicit none
+    ! Arguments
+    class(amg_s_base_ainv_solver_type), intent(in) :: sv
+    integer(psb_epk_) :: val
+    integer             :: i
+
+    val = 0
+    val = val + sv%dv%get_nrows()
+    val = val + sv%w%get_nzeros()
+    val = val + sv%z%get_nzeros()
+
+    return
+  end function s_base_ainv_get_nzeros
+
+  function s_base_ainv_solver_sizeof(sv) result(val)
+    implicit none
+    ! Arguments
+    class(amg_s_base_ainv_solver_type), intent(in) :: sv
+    integer(psb_epk_) :: val
+    integer             :: i
+
+    val = 2*psb_sizeof_ip + psb_sizeof_dp
+    val = val + sv%dv%sizeof()
+    val = val + sv%w%sizeof()
+    val = val + sv%z%sizeof()
+
+    return
+  end function s_base_ainv_solver_sizeof
+
+  function s_base_ainv_get_wrksize() result(val)
+    implicit none
+    integer(psb_ipk_)  :: val
+
+    val = 2
+  end function s_base_ainv_get_wrksize
+
+end module amg_s_base_ainv_mod

amgprec/amg_s_invk_solver.f90

@@ -0,0 +1,168 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+!
+!
+!
+!
+
+module amg_s_invk_solver
+
+  use amg_s_base_solver_mod
+  use amg_s_base_ainv_mod
+  use psb_base_mod, only : psb_s_vect_type
+
+  type, extends(amg_s_base_ainv_solver_type) :: amg_s_invk_solver_type
+    integer(psb_ipk_)   :: fill_in, inv_fill
+  contains
+    procedure, pass(sv) :: check   => amg_s_invk_solver_check
+    procedure, pass(sv) :: clone   => amg_s_invk_solver_clone
+    procedure, pass(sv) :: build   => amg_s_invk_solver_bld
+    procedure, pass(sv) :: cseti   => amg_s_invk_solver_cseti
+    procedure, pass(sv) :: seti    => amg_s_invk_solver_seti
+    generic, public     :: set     => seti
+    procedure, pass(sv) :: descr   => amg_s_invk_solver_descr
+    procedure, pass(sv) :: default => s_invk_solver_default
+  end type amg_s_invk_solver_type
+
+
+  private ::  s_invk_solver_default
+
+
+  interface
+    subroutine amg_s_invk_solver_clone(sv,svout,info)
+      import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat, &
+       & amg_s_base_solver_type, psb_spk_, amg_s_invk_solver_type, psb_ipk_
+      Implicit None
+      class(amg_s_invk_solver_type), intent(inout)              :: sv
+      class(amg_s_base_solver_type), allocatable, intent(inout) :: svout
+      integer(psb_ipk_), intent(out)                            :: info
+    end subroutine amg_s_invk_solver_clone
+  end interface
+
+  interface
+    subroutine amg_s_invk_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat, &
+       & psb_s_vect_type, psb_s_base_vect_type, psb_spk_, &
+       & amg_s_invk_solver_type, psb_i_base_vect_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      type(psb_sspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a
+      class(amg_s_invk_solver_type), intent(inout)        :: sv
+      integer(psb_ipk_), intent(out)                      :: info
+      type(psb_sspmat_type), intent(in), target, optional :: b
+      class(psb_s_base_sparse_mat), intent(in), optional  :: amold
+      class(psb_s_base_vect_type), intent(in), optional   :: vmold
+      class(psb_i_base_vect_type), intent(in), optional   :: imold
+    end subroutine amg_s_invk_solver_bld
+  end interface
+
+  interface
+    subroutine amg_s_invk_solver_check(sv,info)
+      import :: psb_spk_, amg_s_invk_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_s_invk_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_s_invk_solver_check
+  end interface
+
+  interface
+    subroutine amg_s_invk_solver_cseti(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat, &
+           & psb_ipk_, psb_s_vect_type, psb_s_base_vect_type, psb_spk_, &
+           & amg_s_invk_solver_type
+
+      Implicit None
+
+      ! Arguments
+      class(amg_s_invk_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_s_invk_solver_cseti
+  end interface
+
+  interface
+    subroutine amg_s_invk_solver_descr(sv,info,iout,coarse)
+      import :: psb_spk_, amg_s_invk_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_s_invk_solver_type), intent(in) :: sv
+      integer(psb_ipk_), intent(out)            :: info
+      integer(psb_ipk_), intent(in), optional   :: iout
+      logical, intent(in), optional             :: coarse
+
+    end subroutine amg_s_invk_solver_descr
+  end interface
+
+  interface
+    subroutine amg_s_invk_solver_seti(sv,what,val,info)
+      import :: amg_s_invk_solver_type, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_s_invk_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_s_invk_solver_seti
+  end interface
+
+contains
+
+  subroutine s_invk_solver_default(sv)
+
+    !use psb_base_mod
+
+    Implicit None
+
+    ! Arguments
+    class(amg_s_invk_solver_type), intent(inout) :: sv
+
+    sv%fill_in    = 0
+    sv%inv_fill   = 0
+
+    return
+  end subroutine s_invk_solver_default
+
+end module amg_s_invk_solver

amgprec/amg_s_invt_solver.f90

@@ -0,0 +1,194 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+!
+!
+!
+
+module amg_s_invt_solver
+
+  use amg_s_base_solver_mod
+  use amg_s_base_ainv_mod
+  use psb_base_mod, only : psb_s_vect_type
+
+  type, extends(amg_s_base_ainv_solver_type) :: amg_s_invt_solver_type
+    integer(psb_ipk_)   :: fill_in, inv_fill
+    real(psb_spk_)      :: thresh, inv_thresh
+  contains
+    procedure, pass(sv) :: check   => amg_s_invt_solver_check
+    procedure, pass(sv) :: clone   => amg_s_invt_solver_clone
+    procedure, pass(sv) :: build   => amg_s_invt_solver_bld
+    procedure, pass(sv) :: cseti   => amg_s_invt_solver_cseti
+    procedure, pass(sv) :: csetr   => amg_s_invt_solver_csetr
+    procedure, pass(sv) :: seti    => amg_s_invt_solver_seti
+    procedure, pass(sv) :: setr    => amg_s_invt_solver_setr
+    generic, public     :: set     => seti, setr
+    procedure, pass(sv) :: descr   => amg_s_invt_solver_descr
+    procedure, pass(sv) :: default => s_invt_solver_default
+  end type amg_s_invt_solver_type
+
+  private :: s_invt_solver_default
+
+
+  interface
+    subroutine amg_s_invt_solver_clone(sv,svout,info)
+      import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat, &
+       & amg_s_base_solver_type, psb_spk_, amg_s_invt_solver_type, psb_ipk_
+      Implicit None
+      class(amg_s_invt_solver_type), intent(inout)              :: sv
+      class(amg_s_base_solver_type), allocatable, intent(inout) :: svout
+      integer(psb_ipk_), intent(out)                            :: info
+    end subroutine amg_s_invt_solver_clone
+  end interface
+
+  interface
+    subroutine amg_s_invt_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat, &
+       & psb_s_vect_type, psb_s_base_vect_type, psb_spk_,&
+       & amg_s_invt_solver_type, psb_i_base_vect_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      type(psb_sspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a
+      class(amg_s_invt_solver_type), intent(inout)        :: sv
+      integer(psb_ipk_), intent(out)                      :: info
+      type(psb_sspmat_type), intent(in), target, optional :: b
+      class(psb_s_base_sparse_mat), intent(in), optional  :: amold
+      class(psb_s_base_vect_type), intent(in), optional   :: vmold
+      class(psb_i_base_vect_type), intent(in), optional  :: imold
+    end subroutine amg_s_invt_solver_bld
+  end interface
+
+  interface
+    subroutine amg_s_invt_solver_check(sv,info)
+      import :: amg_s_invt_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_s_invt_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_s_invt_solver_check
+  end interface
+
+  interface
+    subroutine amg_s_invt_solver_cseti(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat,  psb_ipk_,&
+           & psb_s_vect_type, psb_s_base_vect_type, psb_spk_, amg_s_invt_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_s_invt_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_s_invt_solver_cseti
+  end interface
+
+  interface
+    subroutine amg_s_invt_solver_csetr(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_sspmat_type,  psb_s_base_sparse_mat,  psb_ipk_,&
+           & psb_s_vect_type, psb_s_base_vect_type, psb_spk_, amg_s_invt_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_s_invt_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      real(psb_spk_), intent(in)                   :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_s_invt_solver_csetr
+  end interface
+
+  interface
+    subroutine amg_s_invt_solver_descr(sv,info,iout,coarse)
+      import :: psb_spk_, amg_s_invt_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_s_invt_solver_type), intent(in) :: sv
+      integer(psb_ipk_), intent(out)            :: info
+      integer(psb_ipk_), intent(in), optional   :: iout
+      logical, intent(in), optional             :: coarse
+
+    end subroutine amg_s_invt_solver_descr
+  end interface
+
+  interface
+    subroutine amg_s_invt_solver_setr(sv,what,val,info)
+      import :: amg_s_invt_solver_type, psb_spk_, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_s_invt_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      real(psb_spk_), intent(in)                   :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_s_invt_solver_setr
+  end interface
+
+  interface
+    subroutine amg_s_invt_solver_seti(sv,what,val,info)
+      import :: amg_s_invt_solver_type, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_s_invt_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine
+  end interface
+
+contains
+
+  subroutine s_invt_solver_default(sv)
+
+    !use psb_base_mod
+
+    Implicit None
+
+    ! Arguments
+    class(amg_s_invt_solver_type), intent(inout) :: sv
+
+    sv%fill_in    = 0
+    sv%inv_fill   = 0
+    sv%thresh     = szero
+    sv%inv_thresh = szero
+
+    return
+  end subroutine s_invt_solver_default
+
+end module amg_s_invt_solver

amgprec/amg_s_prec_mod.f90

@@ -1,15 +1,15 @@
-!   
-!   
+!
+!
 !                             AMG4PSBLAS version 1.0
 !    Algebraic Multigrid Package
 !               based on PSBLAS (Parallel Sparse BLAS version 3.5)
-!    
-!    (C) Copyright 2020 
-!  
-!        Salvatore Filippone  
-!        Pasqua D'Ambra   
-!        Fabio Durastante        
-!   
+!
+!    (C) Copyright 2020
+!
+!        Salvatore Filippone
+!        Pasqua D'Ambra
+!        Fabio Durastante
+!
 !    Redistribution and use in source and binary forms, with or without
 !    modification, are permitted provided that the following conditions
 !    are met:
@@ -21,7 +21,7 @@
 !      3. The name of the AMG4PSBLAS group or the names of its contributors may
 !         not be used to endorse or promote products derived from this
 !         software without specific written permission.
-!   
+!
 !    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 !    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 !    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
@@ -33,8 +33,8 @@
 !    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 !    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 !    POSSIBILITY OF SUCH DAMAGE.
-!   
-!  
+!
+!
 ! File: amg_s_prec_mod.f90
 !
 ! Module: amg_s_prec_mod
@@ -52,6 +52,9 @@ module amg_s_prec_mod
   use amg_s_l1_diag_solver
   use amg_s_ilu_solver
   use amg_s_gs_solver
+  use amg_s_ainv_solver
+  use amg_s_invk_solver
+  use amg_s_invt_solver
 
   interface amg_precset
     module procedure amg_s_iprecsetsm, amg_s_iprecsetsv, &
@@ -78,7 +81,7 @@ module amg_s_prec_mod
       ! !$  character, intent(in), optional         :: upd
     end subroutine amg_s_extprol_bld
   end interface amg_extprol_bld
-  
+
 contains
 
   subroutine amg_s_iprecsetsm(p,val,info,pos)
@@ -108,7 +111,7 @@ contains
 
   subroutine amg_s_cprecseti(p,what,val,info,pos)
     type(amg_sprec_type), intent(inout)   :: p
-    character(len=*), intent(in)            :: what 
+    character(len=*), intent(in)            :: what
     integer(psb_ipk_), intent(in)           :: val
     integer(psb_ipk_), intent(out)          :: info
     character(len=*), optional, intent(in)      :: pos
@@ -118,7 +121,7 @@ contains
 
   subroutine amg_s_cprecsetr(p,what,val,info,pos)
     type(amg_sprec_type), intent(inout)   :: p
-    character(len=*), intent(in)            :: what 
+    character(len=*), intent(in)            :: what
     real(psb_spk_), intent(in)             :: val
     integer(psb_ipk_), intent(out)          :: info
     character(len=*), optional, intent(in)      :: pos
@@ -128,7 +131,7 @@ contains
 
   subroutine amg_s_cprecsetc(p,what,val,info,pos)
     type(amg_sprec_type), intent(inout)   :: p
-    character(len=*), intent(in)            :: what 
+    character(len=*), intent(in)            :: what
     character(len=*), intent(in)            :: val
     integer(psb_ipk_), intent(out)          :: info
     character(len=*), optional, intent(in)      :: pos

amgprec/amg_s_prec_type.f90

@@ -1,15 +1,15 @@
-!  
-!   
+!
+!
 !                             AMG4PSBLAS version 1.0
 !    Algebraic Multigrid Package
 !               based on PSBLAS (Parallel Sparse BLAS version 3.5)
-!    
-!    (C) Copyright 2020 
-!  
-!        Salvatore Filippone  
-!        Pasqua D'Ambra   
-!        Fabio Durastante        
-!   
+!
+!    (C) Copyright 2020
+!
+!        Salvatore Filippone
+!        Pasqua D'Ambra
+!        Fabio Durastante
+!
 !    Redistribution and use in source and binary forms, with or without
 !    modification, are permitted provided that the following conditions
 !    are met:
@@ -21,7 +21,7 @@
 !      3. The name of the AMG4PSBLAS group or the names of its contributors may
 !         not be used to endorse or promote products derived from this
 !         software without specific written permission.
-!   
+!
 !    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 !    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 !    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
@@ -33,21 +33,21 @@
 !    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 !    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 !    POSSIBILITY OF SUCH DAMAGE.
-!   
-!  
+!
+!
 ! File: amg_s_prec_type.f90
 !
 ! Module: amg_s_prec_type
 !
-!  This module defines: 
+!  This module defines:
 !  - the amg_s_prec_type data structure containing the preconditioner and related
 !    data structures;
 !
 !  It contains routines for
-!  - Building and applying; 
+!  - Building and applying;
 !  - checking if the preconditioner is correctly defined;
 !  - printing a	description of the preconditioner;
-!  - deallocating the preconditioner data structure.  
+!  - deallocating the preconditioner data structure.
 !
 
 module amg_s_prec_type
@@ -70,25 +70,25 @@ module amg_s_prec_type
   !  It consists of an array of 'one-level' intermediate data structures
   !  of type amg_sonelev_type, each containing the information needed to apply
   !  the smoothing and the coarse-space correction at a generic level. RT is the
-  !  real data type, i.e. S for both S and C, and D for both D and Z. 
+  !  real data type, i.e. S for both S and C, and D for both D and Z.
   !
   !  type amg_sprec_type
-  !    type(amg_sonelev_type), allocatable :: precv(:) 
+  !    type(amg_sonelev_type), allocatable :: precv(:)
   !  end type amg_sprec_type
-  ! 
+  !
   !  Note that the levels are numbered in increasing order starting from
   !  the level 1 as the finest one, and the number of levels is given by
-  !  size(precv(:))  which is the id of the coarsest level. 
+  !  size(precv(:))  which is the id of the coarsest level.
   !  In the multigrid literature many authors number the levels in the opposite
   !  order, with level 0 being the id of the coarsest level.
   !
   !
   integer, parameter, private :: wv_size_=4
-  
+
   type, extends(psb_sprec_type)        :: amg_sprec_type
     type(amg_saggr_data)                 :: ag_data
     !
-    ! Number of outer sweeps. Sometimes  2 V-cycles may be better than 1 W-cycle. 
+    ! Number of outer sweeps. Sometimes  2 V-cycles may be better than 1 W-cycle.
     !
     integer(psb_ipk_)                  :: outer_sweeps = 1
     !
@@ -97,11 +97,11 @@ module amg_s_prec_type
     ! to keep track against what is put later in the multilevel array
     !
     integer(psb_ipk_)                  :: coarse_solver = -1
-    
+
     !
     ! The multilevel hierarchy
     !
-    type(amg_s_onelev_type), allocatable :: precv(:) 
+    type(amg_s_onelev_type), allocatable :: precv(:)
   contains
     procedure, pass(prec)               :: psb_s_apply2_vect => amg_s_apply2_vect
     procedure, pass(prec)               :: psb_s_apply1_vect => amg_s_apply1_vect
@@ -157,7 +157,7 @@ module amg_s_prec_type
   interface amg_precdescr
     subroutine amg_sfile_prec_descr(prec,iout,root)
       import :: amg_sprec_type, psb_ipk_
-      implicit none 
+      implicit none
       ! Arguments
       class(amg_sprec_type), intent(in)      :: prec
       integer(psb_ipk_), intent(in), optional :: iout
@@ -211,7 +211,7 @@ module amg_s_prec_type
     end subroutine amg_sprecaply1
   end interface
 
-  interface 
+  interface
     subroutine amg_sprecsetsm(prec,val,info,ilev,ilmax,pos)
       import :: psb_sspmat_type, psb_desc_type, psb_spk_, &
            & amg_sprec_type, amg_s_base_smoother_type, psb_ipk_
@@ -243,7 +243,7 @@ module amg_s_prec_type
       import :: psb_sspmat_type, psb_desc_type, psb_spk_, &
            & amg_sprec_type, psb_ipk_
       class(amg_sprec_type), intent(inout)   :: prec
-      character(len=*), intent(in)             :: what 
+      character(len=*), intent(in)             :: what
       integer(psb_ipk_), intent(in)            :: val
       integer(psb_ipk_), intent(out)           :: info
       integer(psb_ipk_), optional, intent(in)  :: ilev,ilmax,idx
@@ -253,7 +253,7 @@ module amg_s_prec_type
       import :: psb_sspmat_type, psb_desc_type, psb_spk_, &
            & amg_sprec_type, psb_ipk_
       class(amg_sprec_type), intent(inout)   :: prec
-      character(len=*), intent(in)             :: what 
+      character(len=*), intent(in)             :: what
       real(psb_spk_), intent(in)                :: val
       integer(psb_ipk_), intent(out)           :: info
       integer(psb_ipk_), optional, intent(in)  :: ilev,ilmax,idx
@@ -263,7 +263,7 @@ module amg_s_prec_type
       import :: psb_sspmat_type, psb_desc_type, psb_spk_, &
            & amg_sprec_type, psb_ipk_
       class(amg_sprec_type), intent(inout)   :: prec
-      character(len=*), intent(in)             :: what 
+      character(len=*), intent(in)             :: what
       character(len=*), intent(in)             :: string
       integer(psb_ipk_), intent(out)           :: info
       integer(psb_ipk_), optional, intent(in)  :: ilev,ilmax,idx
@@ -341,28 +341,28 @@ module amg_s_prec_type
       !      character, intent(in),optional             :: upd
     end subroutine amg_s_smoothers_bld
   end interface amg_smoothers_bld
-  
+
 contains
   !
   ! Function returning a pointer to the smoother
   !
   function amg_s_get_smootherp(prec,ilev) result(val)
-    implicit none 
+    implicit none
     class(amg_sprec_type), target, intent(in) :: prec
     integer(psb_ipk_), optional                 :: ilev
     class(amg_s_base_smoother_type), pointer  :: val
     integer(psb_ipk_)        :: ilev_
-    
+
     val => null()
-    if (present(ilev)) then 
+    if (present(ilev)) then
       ilev_ = ilev
     else
-      ! What is a good default? 
+      ! What is a good default?
       ilev_ = 1
     end if
-    if (allocated(prec%precv)) then 
-      if ((1<=ilev_).and.(ilev_<=size(prec%precv))) then 
-        if (allocated(prec%precv(ilev_)%sm)) then 
+    if (allocated(prec%precv)) then
+      if ((1<=ilev_).and.(ilev_<=size(prec%precv))) then
+        if (allocated(prec%precv(ilev_)%sm)) then
           val => prec%precv(ilev_)%sm
         end if
       end if
@@ -372,23 +372,23 @@ contains
   ! Function returning a pointer to the solver
   !
   function amg_s_get_solverp(prec,ilev) result(val)
-    implicit none 
+    implicit none
     class(amg_sprec_type), target, intent(in) :: prec
     integer(psb_ipk_), optional                 :: ilev
     class(amg_s_base_solver_type), pointer  :: val
     integer(psb_ipk_)        :: ilev_
-    
+
     val => null()
-    if (present(ilev)) then 
+    if (present(ilev)) then
       ilev_ = ilev
     else
-      ! What is a good default? 
+      ! What is a good default?
       ilev_ = 1
     end if
-    if (allocated(prec%precv)) then 
-      if ((1<=ilev_).and.(ilev_<=size(prec%precv))) then 
-        if (allocated(prec%precv(ilev_)%sm)) then 
-          if (allocated(prec%precv(ilev_)%sm%sv)) then 
+    if (allocated(prec%precv)) then
+      if ((1<=ilev_).and.(ilev_<=size(prec%precv))) then
+        if (allocated(prec%precv(ilev_)%sm)) then
+          if (allocated(prec%precv(ilev_)%sm%sv)) then
             val => prec%precv(ilev_)%sm%sv
           end if
         end if
@@ -399,25 +399,25 @@ contains
   ! Function returning the size of the precv(:) array
   !
   function amg_s_get_nlevs(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_sprec_type), intent(in) :: prec
     integer(psb_ipk_) :: val
     val = 0
-    if (allocated(prec%precv)) then 
+    if (allocated(prec%precv)) then
       val = size(prec%precv)
     end if
   end function amg_s_get_nlevs
   !
   ! Function returning the size of the amg_prec_type data structure
-  ! in bytes or in number of nonzeros of the operator(s) involved. 
+  ! in bytes or in number of nonzeros of the operator(s) involved.
   !
   function amg_s_get_nzeros(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_sprec_type), intent(in) :: prec
     integer(psb_epk_) :: val
     integer(psb_ipk_)        :: i
     val = 0
-    if (allocated(prec%precv)) then 
+    if (allocated(prec%precv)) then
       do i=1, size(prec%precv)
         val = val + prec%precv(i)%get_nzeros()
       end do
@@ -425,13 +425,13 @@ contains
   end function amg_s_get_nzeros
 
   function amg_sprec_sizeof(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_sprec_type), intent(in) :: prec
     integer(psb_epk_) :: val
     integer(psb_ipk_)        :: i
     val = 0
     val = val + psb_sizeof_ip
-    if (allocated(prec%precv)) then 
+    if (allocated(prec%precv)) then
       do i=1, size(prec%precv)
         val = val + prec%precv(i)%sizeof()
       end do
@@ -444,40 +444,40 @@ contains
   ! various level to the nonzeroes at the fine level
   ! (original matrix)
   !
-  
+
   function amg_s_get_compl(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_sprec_type), intent(in) :: prec
     real(psb_spk_)  :: val
-    
+
     val = prec%ag_data%op_complexity
 
   end function amg_s_get_compl
-  
-  subroutine amg_s_cmp_compl(prec) 
 
-    implicit none 
+  subroutine amg_s_cmp_compl(prec)
+
+    implicit none
     class(amg_sprec_type), intent(inout) :: prec
-    
+
     real(psb_spk_) :: num, den, nmin
     type(psb_ctxt_type) :: ctxt
-    integer(psb_ipk_)   :: il 
+    integer(psb_ipk_)   :: il
 
     num = -sone
     den = sone
     ctxt = prec%ctxt
-    if (allocated(prec%precv)) then 
+    if (allocated(prec%precv)) then
       il  = 1
       num = prec%precv(il)%base_a%get_nzeros()
       if (num >= szero) then
-        den = num 
+        den = num
         do il=2,size(prec%precv)
           num = num + max(0,prec%precv(il)%base_a%get_nzeros())
         end do
       end if
     end if
     nmin = num
-    call psb_min(ctxt,nmin) 
+    call psb_min(ctxt,nmin)
     if (nmin < szero) then
       num = szero
       den = sone
@@ -487,25 +487,25 @@ contains
     end if
     prec%ag_data%op_complexity = num/den
   end subroutine amg_s_cmp_compl
-  
+
   !
   ! Average coarsening ratio
   !
-  
+
   function amg_s_get_avg_cr(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_sprec_type), intent(in) :: prec
     real(psb_spk_)  :: val
-    
+
     val = prec%ag_data%avg_cr
 
   end function amg_s_get_avg_cr
-  
-  subroutine amg_s_cmp_avg_cr(prec) 
 
-    implicit none 
+  subroutine amg_s_cmp_avg_cr(prec)
+
+    implicit none
     class(amg_sprec_type), intent(inout) :: prec
-    
+
     real(psb_spk_)    :: avgcr
     type(psb_ctxt_type) :: ctxt
     integer(psb_ipk_)   :: il, nl, iam, np
@@ -519,12 +519,12 @@ contains
       do il=2,nl
         avgcr = avgcr + max(szero,prec%precv(il)%szratio)
       end do
-      avgcr = avgcr / (nl-1)      
+      avgcr = avgcr / (nl-1)
     end if
-    call psb_sum(ctxt,avgcr) 
+    call psb_sum(ctxt,avgcr)
     prec%ag_data%avg_cr = avgcr/np
   end subroutine amg_s_cmp_avg_cr
-  
+
   !
   ! Subroutines: amg_Tprec_free
   ! Version: real
@@ -538,74 +538,74 @@ contains
   !             error code.
   !
   subroutine amg_sprecfree(p,info)
-  
+
     implicit none
-    
+
     ! Arguments
     type(amg_sprec_type), intent(inout) :: p
     integer(psb_ipk_), intent(out)        :: info
-    
+
     ! Local variables
     integer(psb_ipk_)   :: me,err_act,i
     character(len=20)   :: name
-    
+
     info=psb_success_
     name = 'amg_sprecfree'
     call psb_erractionsave(err_act)
     if (psb_errstatus_fatal()) then
       info = psb_err_internal_error_; return
     end if
-    
+
     me=-1
-    
+
     call p%free(info)
 
-    
+
     return
-    
+
   end subroutine amg_sprecfree
 
   subroutine amg_s_prec_free(prec,info)
-    
+
     implicit none
-    
+
     ! Arguments
     class(amg_sprec_type), intent(inout) :: prec
     integer(psb_ipk_), intent(out)        :: info
-    
+
     ! Local variables
     integer(psb_ipk_)   :: me,err_act,i
     character(len=20)   :: name
-    
+
     info=psb_success_
     name = 'amg_sprecfree'
     call psb_erractionsave(err_act)
     if (psb_errstatus_fatal()) then
       info = psb_err_internal_error_; goto 9999
     end if
-    
+
     me=-1
-    if (allocated(prec%precv)) then 
-      do i=1,size(prec%precv) 
+    if (allocated(prec%precv)) then
+      do i=1,size(prec%precv)
         call prec%precv(i)%free(info)
       end do
       deallocate(prec%precv,stat=info)
     end if
     call psb_erractionrestore(err_act)
     return
-    
+
 9999 call psb_error_handler(err_act)
     return
-    
+
   end subroutine amg_s_prec_free
 
-  
+
 
   !
-  ! Top level methods. 
+  ! Top level methods.
   !
   subroutine amg_s_apply2_vect(prec,x,y,desc_data,info,trans,work)
-    implicit none 
+    implicit none
     type(psb_desc_type),intent(in)        :: desc_data
     class(amg_sprec_type), intent(inout)  :: prec
     type(psb_s_vect_type),intent(inout)   :: x
@@ -618,13 +618,13 @@ contains
 
     call psb_erractionsave(err_act)
 
-    select type(prec) 
+    select type(prec)
     type is (amg_sprec_type)
       call amg_precapply(prec,x,y,desc_data,info,trans,work)
     class default
       info = psb_err_missing_override_method_
       call psb_errpush(info,name)
-      goto 9999 
+      goto 9999
     end select
 
     call psb_erractionrestore(err_act)
@@ -636,7 +636,7 @@ contains
   end subroutine amg_s_apply2_vect
 
   subroutine amg_s_apply1_vect(prec,x,desc_data,info,trans,work)
-    implicit none 
+    implicit none
     type(psb_desc_type),intent(in)          :: desc_data
     class(amg_sprec_type), intent(inout)  :: prec
     type(psb_s_vect_type),intent(inout)   :: x
@@ -648,13 +648,13 @@ contains
 
     call psb_erractionsave(err_act)
 
-    select type(prec) 
+    select type(prec)
     type is (amg_sprec_type)
       call amg_precapply(prec,x,desc_data,info,trans,work)
     class default
       info = psb_err_missing_override_method_
       call psb_errpush(info,name)
-      goto 9999 
+      goto 9999
     end select
 
     call psb_erractionrestore(err_act)
@@ -667,7 +667,7 @@ contains
 
 
   subroutine amg_s_apply2v(prec,x,y,desc_data,info,trans,work)
-    implicit none 
+    implicit none
     type(psb_desc_type),intent(in)    :: desc_data
     class(amg_sprec_type), intent(inout) :: prec
     real(psb_spk_),intent(inout)      :: x(:)
@@ -680,13 +680,13 @@ contains
 
     call psb_erractionsave(err_act)
 
-    select type(prec) 
+    select type(prec)
     type is (amg_sprec_type)
       call amg_precapply(prec,x,y,desc_data,info,trans,work)
     class default
       info = psb_err_missing_override_method_
       call psb_errpush(info,name)
-      goto 9999 
+      goto 9999
     end select
 
     call psb_erractionrestore(err_act)
@@ -698,7 +698,7 @@ contains
   end subroutine amg_s_apply2v
 
   subroutine amg_s_apply1v(prec,x,desc_data,info,trans)
-    implicit none 
+    implicit none
     type(psb_desc_type),intent(in)    :: desc_data
     class(amg_sprec_type), intent(inout) :: prec
     real(psb_spk_),intent(inout)      :: x(:)
@@ -709,13 +709,13 @@ contains
 
     call psb_erractionsave(err_act)
 
-    select type(prec) 
+    select type(prec)
     type is (amg_sprec_type)
       call amg_precapply(prec,x,desc_data,info,trans)
     class default
       info = psb_err_missing_override_method_
       call psb_errpush(info,name)
-      goto 9999 
+      goto 9999
     end select
 
     call psb_erractionrestore(err_act)
@@ -730,8 +730,8 @@ contains
   subroutine amg_s_dump(prec,info,istart,iend,iproc,prefix,head,&
        & ac,rp,smoother,solver,tprol,&
        & global_num)
-    
-    implicit none 
+
+    implicit none
     class(amg_sprec_type), intent(in)     :: prec
     integer(psb_ipk_), intent(out)          :: info
     integer(psb_ipk_), intent(in), optional :: istart, iend, iproc
@@ -742,27 +742,26 @@ contains
     integer(psb_ipk_)   :: iam, np, iproc_
     character(len=80)   :: prefix_
     character(len=120)  :: fname ! len should be at least 20 more than
-    !  len of prefix_ 
+    !  len of prefix_
 
     info = 0
     ctxt = prec%ctxt
     call psb_info(ctxt,iam,np)
-    
     iln = size(prec%precv)
-    if (present(istart)) then 
+    if (present(istart)) then
       il1 = max(1,istart)
     else
       il1 = min(2,iln)
     end if
-    if (present(iend)) then 
+    if (present(iend)) then
       iln = min(iln, iend)
     end if
     iproc_ = -1
-    if (present(iproc)) then 
+    if (present(iproc)) then
       iproc_ = iproc
     end if
 
-    if ((iproc_ == -1).or.(iproc_==iam)) then 
+    if ((iproc_ == -1).or.(iproc_==iam)) then
       do lev=il1, iln
         call prec%precv(lev)%dump(lev,info,prefix=prefix,head=head,&
              & ac=ac,smoother=smoother,solver=solver,rp=rp,tprol=tprol, &
@@ -773,7 +772,7 @@ contains
 
   subroutine amg_s_cnv(prec,info,amold,vmold,imold)
 
-    implicit none 
+    implicit none
     class(amg_sprec_type), intent(inout) :: prec
     integer(psb_ipk_), intent(out)       :: info
     class(psb_s_base_sparse_mat), intent(in), optional :: amold
@@ -781,7 +780,7 @@ contains
     class(psb_i_base_vect_type), intent(in), optional  :: imold
 
     integer(psb_ipk_) :: i
-    
+
     info = psb_success_
     if (allocated(prec%precv)) then
       do i=1,size(prec%precv)
@@ -789,24 +788,24 @@ contains
              & call prec%precv(i)%cnv(info,amold=amold,vmold=vmold,imold=imold)
       end do
     end if
-    
+
   end subroutine amg_s_cnv
 
   subroutine amg_s_clone(prec,precout,info)
 
-    implicit none 
+    implicit none
     class(amg_sprec_type), intent(inout) :: prec
     class(psb_sprec_type), intent(inout) :: precout
     integer(psb_ipk_), intent(out)       :: info
-    
+
     call precout%free(info)
-    if (info == 0) call amg_s_inner_clone(prec,precout,info) 
+    if (info == 0) call amg_s_inner_clone(prec,precout,info)
 
   end subroutine amg_s_clone
 
   subroutine amg_s_inner_clone(prec,precout,info)
 
-    implicit none 
+    implicit none
     class(amg_sprec_type), intent(inout)         :: prec
     class(psb_sprec_type), target, intent(inout) :: precout
     integer(psb_ipk_), intent(out)             :: info
@@ -821,17 +820,17 @@ contains
       pout%ctxt          = prec%ctxt
       pout%ag_data       = prec%ag_data
       pout%outer_sweeps  = prec%outer_sweeps
-      if (allocated(prec%precv)) then 
-        ln = size(prec%precv) 
+      if (allocated(prec%precv)) then
+        ln = size(prec%precv)
         allocate(pout%precv(ln),stat=info)
         if (info /= psb_success_) goto 9999
-        if (ln >= 1) then 
+        if (ln >= 1) then
           call prec%precv(1)%clone(pout%precv(1),info)
         end if
         do lev=2, ln
           if (info /= psb_success_) exit
           call prec%precv(lev)%clone(pout%precv(lev),info)
-          if (info == psb_success_) then 
+          if (info == psb_success_) then
             pout%precv(lev)%base_a       => pout%precv(lev)%ac
             pout%precv(lev)%base_desc    => pout%precv(lev)%desc_ac
             pout%precv(lev)%linmap%p_desc_U => pout%precv(lev-1)%base_desc
@@ -842,7 +841,7 @@ contains
       if (allocated(prec%precv(1)%wrk)) &
            & call pout%allocate_wrk(info,vmold=prec%precv(1)%wrk%vx2l%v)
 
-    class default 
+    class default
       write(0,*) 'Error: wrong out type'
       info = psb_err_invalid_input_
     end select
@@ -854,14 +853,14 @@ contains
     implicit none
     class(amg_sprec_type), intent(inout) :: prec
     class(amg_sprec_type), intent(inout), target :: b
-    integer(psb_ipk_), intent(out) :: info 
+    integer(psb_ipk_), intent(out) :: info
     integer(psb_ipk_) :: i
-    
-    if (same_type_as(prec,b)) then 
-      if (allocated(b%precv)) then 
+
+    if (same_type_as(prec,b)) then
+      if (allocated(b%precv)) then
         ! This might not be required if FINAL procedures are available.
         call b%free(info)
-        if (info /= psb_success_) then 
+        if (info /= psb_success_) then
           !?????
 !!$        return
         endif
@@ -869,7 +868,7 @@ contains
       b%ctxt         = prec%ctxt
       b%ag_data       = prec%ag_data
       b%outer_sweeps  = prec%outer_sweeps
-            
+
       call move_alloc(prec%precv,b%precv)
       ! Fix the pointers except on level 1.
       do i=2, size(b%precv)
@@ -878,7 +877,7 @@ contains
         b%precv(i)%linmap%p_desc_U => b%precv(i-1)%base_desc
         b%precv(i)%linmap%p_desc_V => b%precv(i)%base_desc
       end do
-            
+
     else
       write(0,*) 'Warning: PREC%move_alloc onto different type?'
       info = psb_err_internal_error_
@@ -888,7 +887,7 @@ contains
   subroutine amg_s_allocate_wrk(prec,info,vmold,desc)
     use psb_base_mod
     implicit none
-    
+
     ! Arguments
     class(amg_sprec_type), intent(inout) :: prec
     integer(psb_ipk_), intent(out)        :: info
@@ -896,37 +895,37 @@ contains
     !
     ! In MLD the DESC optional argument is ignored, since
     ! the necessary info is contained in the various entries of the
-    ! PRECV component. 
+    ! PRECV component.
     type(psb_desc_type), intent(in), optional  :: desc
-    
+
     ! Local variables
     integer(psb_ipk_)   :: me,err_act,i,j,level,nlev, nc2l
     character(len=20)   :: name
-    
+
     info=psb_success_
     name = 'amg_s_allocate_wrk'
     call psb_erractionsave(err_act)
     if (psb_errstatus_fatal()) then
       info = psb_err_internal_error_; goto 9999
     end if
-    nlev   = size(prec%precv)  
+    nlev   = size(prec%precv)
     level = 1
     do level = 1, nlev
       call prec%precv(level)%allocate_wrk(info,vmold=vmold)
-      if (psb_errstatus_fatal()) then 
+      if (psb_errstatus_fatal()) then
         nc2l = prec%precv(level)%base_desc%get_local_cols()
         info=psb_err_alloc_request_
         call psb_errpush(info,name,i_err=(/2*nc2l/), a_err='real(psb_spk_)')
-        goto 9999      
+        goto 9999
       end if
     end do
 
     call psb_erractionrestore(err_act)
     return
-    
+
 9999 call psb_error_handler(err_act)
     return
-    
+
   end subroutine amg_s_allocate_wrk
 
   subroutine amg_s_free_wrk(prec,info)
@@ -948,13 +947,13 @@ contains
       info = psb_err_internal_error_; goto 9999
     end if
 
-    if (allocated(prec%precv)) then 
-      nlev   = size(prec%precv)  
+    if (allocated(prec%precv)) then
+      nlev   = size(prec%precv)
       do level = 1, nlev
         call prec%precv(level)%free_wrk(info)
       end do
     end if
-    
+
     call psb_erractionrestore(err_act)
     return
 
@@ -966,7 +965,7 @@ contains
   function amg_s_is_allocated_wrk(prec) result(res)
     use psb_base_mod
     implicit none
-    
+
     ! Arguments
     class(amg_sprec_type), intent(in) :: prec
     logical :: res
@@ -974,7 +973,7 @@ contains
     res = .false.
     if (.not.allocated(prec%precv)) return
     res = allocated(prec%precv(1)%wrk)
-     
+
   end function amg_s_is_allocated_wrk
 
 end module amg_s_prec_type

amgprec/amg_z_ainv_solver.F90

@@ -0,0 +1,321 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+!
+!
+!
+!
+module amg_z_ainv_solver
+
+  use amg_z_base_ainv_mod
+  use psb_base_mod, only : psb_d_vect_type
+
+  type, extends(amg_z_base_ainv_solver_type) :: amg_z_ainv_solver_type
+    !
+    !  Compute an approximate factorization
+    !      A^-1 = Z D^-1 W^T
+    !  Note that here W is going to be transposed explicitly,
+    !  so that the component w will in the end contain W^T.
+    !
+    integer(psb_ipk_)   :: alg, fill_in
+    real(psb_dpk_)      :: thresh
+  contains
+    procedure, pass(sv) :: check   => amg_z_ainv_solver_check
+    procedure, pass(sv) :: build   => amg_z_ainv_solver_bld
+    procedure, pass(sv) :: clone   => amg_z_ainv_solver_clone
+    procedure, pass(sv) :: cseti   => amg_z_ainv_solver_cseti
+    procedure, pass(sv) :: csetc   => amg_z_ainv_solver_csetc
+    procedure, pass(sv) :: csetr   => amg_z_ainv_solver_csetr
+    procedure, pass(sv) :: seti    => amg_z_ainv_solver_seti
+    procedure, pass(sv) :: setc    => amg_z_ainv_solver_setc
+    procedure, pass(sv) :: setr    => amg_z_ainv_solver_setr
+    generic, public :: set => seti, setr, setc
+    procedure, pass(sv) :: descr   => amg_z_ainv_solver_descr
+    procedure, pass(sv) :: default => z_ainv_solver_default
+    procedure, nopass   :: stringval  => z_ainv_stringval
+    procedure, nopass   :: algname => z_ainv_algname
+  end type amg_z_ainv_solver_type
+
+
+  private :: z_ainv_stringval, z_ainv_solver_default, &
+       &  z_ainv_algname
+
+  interface
+    subroutine amg_z_ainv_solver_clone(sv,svout,info)
+      import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat, &
+       & amg_z_base_solver_type, psb_dpk_, amg_z_ainv_solver_type, psb_ipk_
+      Implicit None
+      class(amg_z_ainv_solver_type), intent(inout)              :: sv
+      class(amg_z_base_solver_type), allocatable, intent(inout) :: svout
+      integer(psb_ipk_), intent(out)                            :: info
+    end subroutine amg_z_ainv_solver_clone
+  end interface
+
+
+  interface
+    subroutine amg_z_ainv_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat, &
+       & psb_d_vect_type, psb_z_base_vect_type, psb_dpk_,&
+       & amg_z_ainv_solver_type, psb_i_base_vect_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      type(psb_zspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a
+      class(amg_z_ainv_solver_type), intent(inout)        :: sv
+      integer(psb_ipk_), intent(out)                      :: info
+      type(psb_zspmat_type), intent(in), target, optional :: b
+      class(psb_z_base_sparse_mat), intent(in), optional  :: amold
+      class(psb_z_base_vect_type), intent(in), optional   :: vmold
+      class(psb_i_base_vect_type), intent(in), optional   :: imold
+    end subroutine amg_z_ainv_solver_bld
+  end interface
+
+  interface
+    subroutine amg_z_ainv_solver_check(sv,info)
+      import :: psb_dpk_, amg_z_ainv_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_z_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_z_ainv_solver_check
+  end interface
+
+  interface
+    subroutine amg_z_ainv_solver_cseti(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat, psb_ipk_,&
+           & psb_d_vect_type, psb_z_base_vect_type, psb_dpk_, amg_z_ainv_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_z_ainv_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_z_ainv_solver_cseti
+  end interface
+
+
+  interface
+    subroutine amg_z_ainv_solver_csetc(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat, psb_ipk_,&
+           & psb_d_vect_type, psb_z_base_vect_type, psb_dpk_, amg_z_ainv_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_z_ainv_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      character(len=*), intent(in)                 :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_z_ainv_solver_csetc
+  end interface
+
+  interface
+    subroutine amg_z_ainv_solver_csetr(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat,  psb_ipk_,&
+           & psb_d_vect_type, psb_z_base_vect_type, psb_dpk_, amg_z_ainv_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_z_ainv_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      real(psb_dpk_), intent(in)                   :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_z_ainv_solver_csetr
+  end interface
+
+  interface
+    subroutine amg_z_ainv_solver_setc(sv,what,val,info)
+      import :: amg_z_ainv_solver_type, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_z_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      character(len=*), intent(in)                 :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_z_ainv_solver_setc
+  end interface
+
+  interface
+    subroutine amg_z_ainv_solver_seti(sv,what,val,info)
+      import :: amg_z_ainv_solver_type, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_z_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_z_ainv_solver_seti
+  end interface
+
+  interface
+    subroutine amg_z_ainv_solver_setr(sv,what,val,info)
+      import :: amg_z_ainv_solver_type, psb_ipk_, psb_dpk_
+      Implicit none
+      ! Arguments
+      class(amg_z_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      real(psb_dpk_), intent(in)                   :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_z_ainv_solver_setr
+  end interface
+
+  interface
+    subroutine amg_z_ainv_solver_descr(sv,info,iout,coarse)
+      import :: psb_dpk_, amg_z_ainv_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_z_ainv_solver_type), intent(in) :: sv
+      integer(psb_ipk_), intent(out)            :: info
+      integer(psb_ipk_), intent(in), optional   :: iout
+      logical, intent(in), optional             :: coarse
+
+    end subroutine amg_z_ainv_solver_descr
+  end interface
+
+  interface  amg_ainv_bld
+    subroutine amg_z_ainv_bld(a,alg,fillin,thresh,wmat,d,zmat,desc,info,blck,iscale)
+      import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat, &
+           & psb_d_vect_type, psb_z_base_vect_type, psb_dpk_, psb_ipk_
+      implicit none
+      type(psb_zspmat_type), intent(in), target   :: a
+      integer(psb_ipk_), intent(in)               :: fillin,alg
+      real(psb_dpk_), intent(in)                  :: thresh
+      type(psb_zspmat_type), intent(inout)        :: wmat, zmat
+      complex(psb_dpk_), allocatable                 :: d(:)
+      Type(psb_desc_type), Intent(inout)          :: desc
+      integer(psb_ipk_), intent(out)              :: info
+      type(psb_zspmat_type), intent(in), optional :: blck
+      integer(psb_ipk_), intent(in), optional     :: iscale
+    end subroutine amg_z_ainv_bld
+  end interface
+
+
+contains
+
+  subroutine z_ainv_solver_default(sv)
+
+    use psb_base_mod
+
+    Implicit None
+
+    ! Arguments
+    class(amg_z_ainv_solver_type), intent(inout) :: sv
+
+    sv%alg     = amg_ainv_llk_
+    sv%fill_in = 0
+    sv%thresh  = dzero
+
+    return
+  end subroutine z_ainv_solver_default
+
+  function is_positive_nz_min(ip) result(res)
+    implicit none
+    integer(psb_ipk_), intent(in) :: ip
+    logical             :: res
+
+    res = (ip >= 1)
+    return
+  end function is_positive_nz_min
+
+
+  function z_ainv_stringval(string) result(val)
+    use psb_base_mod, only : psb_ipk_,psb_toupper
+    implicit none
+  ! Arguments
+    character(len=*), intent(in) :: string
+    integer(psb_ipk_) :: val
+    character(len=*), parameter :: name='d_ainv_stringval'
+
+    select case(psb_toupper(trim(string)))
+    case('LLK')
+      val = amg_ainv_llk_
+    case('STAB-LLK')
+      val = amg_ainv_s_ft_llk_
+    case('SYM-LLK')
+      val = amg_ainv_s_llk_
+    case('MLK')
+      val = amg_ainv_mlk_
+#if defined(HAVE_TUMA_SAINV)
+    case('SAINV-TUMA')
+      val = amg_ainv_s_tuma_
+    case('LAINV-TUMA')
+      val = amg_ainv_l_tuma_
+#endif
+    case default
+      val  = amg_stringval(string)
+    end select
+  end function z_ainv_stringval
+
+
+  function z_ainv_algname(ialg) result(val)
+    integer(psb_ipk_), intent(in) :: ialg
+    character(len=40) :: val
+
+    character(len=*), parameter :: mlkname   = 'Left-looking, list merge '
+    character(len=*), parameter :: llkname   = 'Left-looking '
+    character(len=*), parameter :: stabllkname  = 'Stabilized Left-looking '
+    character(len=*), parameter :: sllkname  = 'Symmetric Left-looking '
+    character(len=*), parameter :: sainvname = 'SAINV (Benzi & Tuma) '
+    character(len=*), parameter :: lainvname = 'LAINV (Benzi & Tuma) '
+    character(len=*), parameter :: defname   = 'Unknown alg variant '
+
+    select case (ialg)
+    case(amg_ainv_mlk_)
+      val = mlkname
+    case(amg_ainv_llk_)
+      val = llkname
+    case(amg_ainv_s_llk_)
+      val = sllkname
+    case(amg_ainv_s_ft_llk_)
+      val = stabllkname
+#if defined(HAVE_TUMA_SAINV)
+    case(amg_ainv_s_tuma_ )
+      val = sainvname
+    case(amg_ainv_l_tuma_ )
+      val = lainvname
+#endif
+    case default
+      val = defname
+    end select
+
+  end function z_ainv_algname
+
+end module amg_z_ainv_solver

amgprec/amg_z_base_ainv_mod.f90

@@ -0,0 +1,199 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+module amg_z_base_ainv_mod
+
+  use amg_base_ainv_mod
+  use amg_z_base_solver_mod
+  use psb_z_ainv_tools_mod
+  use psb_base_mod, only : psb_z_vect_type, psb_dpk_, psb_epk_
+
+
+
+  type, extends(amg_z_base_solver_type) :: amg_z_base_ainv_solver_type
+    !
+    !  Compute an approximate factorization
+    !      A^-1 = Z D^-1 W^T
+    !  Note that here W is going to be transposed explicitly,
+    !  so that the component w will in the end contain W^T.
+    !
+    type(psb_zspmat_type)       :: w, z
+    type(psb_z_vect_type)       :: dv
+    complex(psb_dpk_), allocatable :: d(:)
+
+  contains
+    procedure, pass(sv) :: cnv     => amg_z_base_ainv_solver_cnv
+    procedure, pass(sv) :: dump    => amg_z_base_ainv_solver_dmp
+    procedure, pass(sv) :: apply_v => amg_z_base_ainv_solver_apply_vect
+    procedure, pass(sv) :: apply_a => amg_z_base_ainv_solver_apply
+    procedure, pass(sv) :: free    => amg_z_base_ainv_solver_free
+    procedure, pass(sv) :: sizeof  => z_base_ainv_solver_sizeof
+    procedure, pass(sv) :: get_nzeros => z_base_ainv_get_nzeros
+    procedure, nopass   :: get_wrksz => z_base_ainv_get_wrksize
+    procedure, pass(sv) :: update_a => amg_z_base_ainv_update_a
+    generic, public     :: update => update_a
+  end type amg_z_base_ainv_solver_type
+
+  private ::  z_base_ainv_solver_sizeof, &
+       & z_base_ainv_get_nzeros, z_base_ainv_get_wrksize
+
+
+  interface
+    subroutine amg_z_base_ainv_solver_cnv(sv,info,amold,vmold,imold)
+      import :: psb_z_base_sparse_mat, psb_z_base_vect_type, psb_dpk_, &
+       & amg_z_base_ainv_solver_type, psb_ipk_, psb_i_base_vect_type
+      Implicit None
+      ! Arguments
+      class(amg_z_base_ainv_solver_type), intent(inout)  :: sv
+      integer(psb_ipk_), intent(out)                     :: info
+      class(psb_z_base_sparse_mat), intent(in), optional :: amold
+      class(psb_z_base_vect_type), intent(in), optional  :: vmold
+      class(psb_i_base_vect_type), intent(in), optional  :: imold
+    end subroutine amg_z_base_ainv_solver_cnv
+  end interface
+
+  interface
+    subroutine amg_z_base_ainv_update_a(sv,x,desc_data,info)
+      import :: psb_desc_type, psb_dpk_,amg_z_base_ainv_solver_type, psb_z_vect_type, psb_ipk_
+      type(psb_desc_type), intent(in)      :: desc_data
+      class(amg_z_base_ainv_solver_type), intent(inout) :: sv
+      complex(psb_dpk_),intent(in)            :: x(:)
+      integer(psb_ipk_), intent(out)       :: info
+    end subroutine amg_z_base_ainv_update_a
+  end interface
+
+  interface
+    subroutine amg_z_base_ainv_solver_apply(alpha,sv,x,beta,y,desc_data,&
+         & trans,work,info,init,initu)
+      import :: psb_desc_type, psb_dpk_,amg_z_base_ainv_solver_type, psb_ipk_
+      type(psb_desc_type), intent(in)      :: desc_data
+      class(amg_z_base_ainv_solver_type), intent(inout) :: sv
+      complex(psb_dpk_),intent(inout)         :: x(:)
+      complex(psb_dpk_),intent(inout)         :: y(:)
+      complex(psb_dpk_),intent(in)            :: alpha,beta
+      character(len=1),intent(in)          :: trans
+      complex(psb_dpk_),target, intent(inout) :: work(:)
+      integer(psb_ipk_), intent(out)       :: info
+      character, intent(in), optional      :: init
+      complex(psb_dpk_),intent(inout), optional :: initu(:)
+    end subroutine amg_z_base_ainv_solver_apply
+  end interface
+
+  interface
+    subroutine amg_z_base_ainv_solver_apply_vect(alpha,sv,x,beta,y,desc_data,&
+         &  trans,work,wv,info,init,initu)
+      import :: psb_desc_type, psb_dpk_,amg_z_base_ainv_solver_type, psb_z_vect_type, psb_ipk_
+      type(psb_desc_type), intent(in)      :: desc_data
+      class(amg_z_base_ainv_solver_type), intent(inout) :: sv
+      type(psb_z_vect_type),intent(inout)  :: x
+      type(psb_z_vect_type),intent(inout)  :: y
+      complex(psb_dpk_),intent(in)            :: alpha,beta
+      character(len=1),intent(in)          :: trans
+      complex(psb_dpk_),target, intent(inout) :: work(:)
+      type(psb_z_vect_type),intent(inout)  :: wv(:)
+      integer(psb_ipk_), intent(out)       :: info
+      character, intent(in), optional      :: init
+      type(psb_z_vect_type),intent(inout), optional   :: initu
+    end subroutine amg_z_base_ainv_solver_apply_vect
+  end interface
+
+
+  interface
+    subroutine amg_z_base_ainv_solver_free(sv,info)
+      import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat, &
+           & psb_z_vect_type, psb_z_base_vect_type, psb_dpk_, amg_z_base_ainv_solver_type, psb_ipk_
+      Implicit None
+
+      ! Arguments
+      class(amg_z_base_ainv_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)                    :: info
+    end subroutine amg_z_base_ainv_solver_free
+  end interface
+
+  interface
+    subroutine amg_z_base_ainv_solver_dmp(sv,desc,level,info,prefix,head,solver,global_num)
+      import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat, &
+           & psb_z_vect_type, psb_z_base_vect_type, psb_dpk_, amg_z_base_ainv_solver_type, psb_ipk_
+
+      implicit none
+      class(amg_z_base_ainv_solver_type), intent(in) :: sv
+      type(psb_desc_type), intent(in)        :: desc
+      integer(psb_ipk_), intent(in)          :: level
+      integer(psb_ipk_), intent(out)         :: info
+      character(len=*), intent(in), optional :: prefix, head
+      logical, optional, intent(in)    :: solver, global_num
+    end subroutine amg_z_base_ainv_solver_dmp
+  end interface
+
+contains
+
+  function z_base_ainv_get_nzeros(sv) result(val)
+    implicit none
+    ! Arguments
+    class(amg_z_base_ainv_solver_type), intent(in) :: sv
+    integer(psb_epk_) :: val
+    integer             :: i
+
+    val = 0
+    val = val + sv%dv%get_nrows()
+    val = val + sv%w%get_nzeros()
+    val = val + sv%z%get_nzeros()
+
+    return
+  end function z_base_ainv_get_nzeros
+
+  function z_base_ainv_solver_sizeof(sv) result(val)
+    implicit none
+    ! Arguments
+    class(amg_z_base_ainv_solver_type), intent(in) :: sv
+    integer(psb_epk_) :: val
+    integer             :: i
+
+    val = 2*psb_sizeof_ip + psb_sizeof_dp
+    val = val + sv%dv%sizeof()
+    val = val + sv%w%sizeof()
+    val = val + sv%z%sizeof()
+
+    return
+  end function z_base_ainv_solver_sizeof
+
+  function z_base_ainv_get_wrksize() result(val)
+    implicit none
+    integer(psb_ipk_)  :: val
+
+    val = 2
+  end function z_base_ainv_get_wrksize
+
+end module amg_z_base_ainv_mod

amgprec/amg_z_invk_solver.f90

@@ -0,0 +1,168 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+!
+!
+!
+!
+
+module amg_z_invk_solver
+
+  use amg_z_base_solver_mod
+  use amg_z_base_ainv_mod
+  use psb_base_mod, only : psb_z_vect_type
+
+  type, extends(amg_z_base_ainv_solver_type) :: amg_z_invk_solver_type
+    integer(psb_ipk_)   :: fill_in, inv_fill
+  contains
+    procedure, pass(sv) :: check   => amg_z_invk_solver_check
+    procedure, pass(sv) :: clone   => amg_z_invk_solver_clone
+    procedure, pass(sv) :: build   => amg_z_invk_solver_bld
+    procedure, pass(sv) :: cseti   => amg_z_invk_solver_cseti
+    procedure, pass(sv) :: seti    => amg_z_invk_solver_seti
+    generic, public     :: set     => seti
+    procedure, pass(sv) :: descr   => amg_z_invk_solver_descr
+    procedure, pass(sv) :: default => z_invk_solver_default
+  end type amg_z_invk_solver_type
+
+
+  private ::  z_invk_solver_default
+
+
+  interface
+    subroutine amg_z_invk_solver_clone(sv,svout,info)
+      import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat, &
+       & amg_z_base_solver_type, psb_dpk_, amg_z_invk_solver_type, psb_ipk_
+      Implicit None
+      class(amg_z_invk_solver_type), intent(inout)              :: sv
+      class(amg_z_base_solver_type), allocatable, intent(inout) :: svout
+      integer(psb_ipk_), intent(out)                            :: info
+    end subroutine amg_z_invk_solver_clone
+  end interface
+
+  interface
+    subroutine amg_z_invk_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat, &
+       & psb_z_vect_type, psb_z_base_vect_type, psb_dpk_, &
+       & amg_z_invk_solver_type, psb_i_base_vect_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      type(psb_zspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a
+      class(amg_z_invk_solver_type), intent(inout)        :: sv
+      integer(psb_ipk_), intent(out)                      :: info
+      type(psb_zspmat_type), intent(in), target, optional :: b
+      class(psb_z_base_sparse_mat), intent(in), optional  :: amold
+      class(psb_z_base_vect_type), intent(in), optional   :: vmold
+      class(psb_i_base_vect_type), intent(in), optional   :: imold
+    end subroutine amg_z_invk_solver_bld
+  end interface
+
+  interface
+    subroutine amg_z_invk_solver_check(sv,info)
+      import :: psb_dpk_, amg_z_invk_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_z_invk_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_z_invk_solver_check
+  end interface
+
+  interface
+    subroutine amg_z_invk_solver_cseti(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat, &
+           & psb_ipk_, psb_z_vect_type, psb_z_base_vect_type, psb_dpk_, &
+           & amg_z_invk_solver_type
+
+      Implicit None
+
+      ! Arguments
+      class(amg_z_invk_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_z_invk_solver_cseti
+  end interface
+
+  interface
+    subroutine amg_z_invk_solver_descr(sv,info,iout,coarse)
+      import :: psb_dpk_, amg_z_invk_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_z_invk_solver_type), intent(in) :: sv
+      integer(psb_ipk_), intent(out)            :: info
+      integer(psb_ipk_), intent(in), optional   :: iout
+      logical, intent(in), optional             :: coarse
+
+    end subroutine amg_z_invk_solver_descr
+  end interface
+
+  interface
+    subroutine amg_z_invk_solver_seti(sv,what,val,info)
+      import :: amg_z_invk_solver_type, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_z_invk_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_z_invk_solver_seti
+  end interface
+
+contains
+
+  subroutine z_invk_solver_default(sv)
+
+    !use psb_base_mod
+
+    Implicit None
+
+    ! Arguments
+    class(amg_z_invk_solver_type), intent(inout) :: sv
+
+    sv%fill_in    = 0
+    sv%inv_fill   = 0
+
+    return
+  end subroutine z_invk_solver_default
+
+end module amg_z_invk_solver

amgprec/amg_z_invt_solver.f90

@@ -0,0 +1,194 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+!
+!
+!
+!
+
+module amg_z_invt_solver
+
+  use amg_z_base_solver_mod
+  use amg_z_base_ainv_mod
+  use psb_base_mod, only : psb_z_vect_type
+
+  type, extends(amg_z_base_ainv_solver_type) :: amg_z_invt_solver_type
+    integer(psb_ipk_)   :: fill_in, inv_fill
+    real(psb_dpk_)      :: thresh, inv_thresh
+  contains
+    procedure, pass(sv) :: check   => amg_z_invt_solver_check
+    procedure, pass(sv) :: clone   => amg_z_invt_solver_clone
+    procedure, pass(sv) :: build   => amg_z_invt_solver_bld
+    procedure, pass(sv) :: cseti   => amg_z_invt_solver_cseti
+    procedure, pass(sv) :: csetr   => amg_z_invt_solver_csetr
+    procedure, pass(sv) :: seti    => amg_z_invt_solver_seti
+    procedure, pass(sv) :: setr    => amg_z_invt_solver_setr
+    generic, public     :: set     => seti, setr
+    procedure, pass(sv) :: descr   => amg_z_invt_solver_descr
+    procedure, pass(sv) :: default => z_invt_solver_default
+  end type amg_z_invt_solver_type
+
+  private :: z_invt_solver_default
+
+
+  interface
+    subroutine amg_z_invt_solver_clone(sv,svout,info)
+      import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat, &
+       & amg_z_base_solver_type, psb_dpk_, amg_z_invt_solver_type, psb_ipk_
+      Implicit None
+      class(amg_z_invt_solver_type), intent(inout)              :: sv
+      class(amg_z_base_solver_type), allocatable, intent(inout) :: svout
+      integer(psb_ipk_), intent(out)                            :: info
+    end subroutine amg_z_invt_solver_clone
+  end interface
+
+  interface
+    subroutine amg_z_invt_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat, &
+       & psb_z_vect_type, psb_z_base_vect_type, psb_dpk_,&
+       & amg_z_invt_solver_type, psb_i_base_vect_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      type(psb_zspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a
+      class(amg_z_invt_solver_type), intent(inout)        :: sv
+      integer(psb_ipk_), intent(out)                      :: info
+      type(psb_zspmat_type), intent(in), target, optional :: b
+      class(psb_z_base_sparse_mat), intent(in), optional  :: amold
+      class(psb_z_base_vect_type), intent(in), optional   :: vmold
+      class(psb_i_base_vect_type), intent(in), optional  :: imold
+    end subroutine amg_z_invt_solver_bld
+  end interface
+
+  interface
+    subroutine amg_z_invt_solver_check(sv,info)
+      import :: amg_z_invt_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_z_invt_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_z_invt_solver_check
+  end interface
+
+  interface
+    subroutine amg_z_invt_solver_cseti(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat,  psb_ipk_,&
+           & psb_z_vect_type, psb_z_base_vect_type, psb_dpk_, amg_z_invt_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_z_invt_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_z_invt_solver_cseti
+  end interface
+
+  interface
+    subroutine amg_z_invt_solver_csetr(sv,what,val,info,idx)
+      import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat,  psb_ipk_,&
+           & psb_z_vect_type, psb_z_base_vect_type, psb_dpk_, amg_z_invt_solver_type
+      Implicit None
+      ! Arguments
+      class(amg_z_invt_solver_type), intent(inout) :: sv
+      character(len=*), intent(in)                 :: what
+      real(psb_dpk_), intent(in)                   :: val
+      integer(psb_ipk_), intent(out)               :: info
+      integer(psb_ipk_), intent(in), optional      :: idx
+    end subroutine amg_z_invt_solver_csetr
+  end interface
+
+  interface
+    subroutine amg_z_invt_solver_descr(sv,info,iout,coarse)
+      import :: psb_dpk_, amg_z_invt_solver_type, psb_ipk_
+
+      Implicit None
+
+      ! Arguments
+      class(amg_z_invt_solver_type), intent(in) :: sv
+      integer(psb_ipk_), intent(out)            :: info
+      integer(psb_ipk_), intent(in), optional   :: iout
+      logical, intent(in), optional             :: coarse
+
+    end subroutine amg_z_invt_solver_descr
+  end interface
+
+  interface
+    subroutine amg_z_invt_solver_setr(sv,what,val,info)
+      import :: amg_z_invt_solver_type, psb_dpk_, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_z_invt_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      real(psb_dpk_), intent(in)                   :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_z_invt_solver_setr
+  end interface
+
+  interface
+    subroutine amg_z_invt_solver_seti(sv,what,val,info)
+      import :: amg_z_invt_solver_type, psb_ipk_
+      Implicit none
+      ! Arguments
+      class(amg_z_invt_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(in)                :: what
+      integer(psb_ipk_), intent(in)                :: val
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine
+  end interface
+
+contains
+
+  subroutine z_invt_solver_default(sv)
+
+    !use psb_base_mod
+
+    Implicit None
+
+    ! Arguments
+    class(amg_z_invt_solver_type), intent(inout) :: sv
+
+    sv%fill_in    = 0
+    sv%inv_fill   = 0
+    sv%thresh     = dzero
+    sv%inv_thresh = dzero
+
+    return
+  end subroutine z_invt_solver_default
+
+end module amg_z_invt_solver

amgprec/amg_z_prec_mod.f90

@@ -1,15 +1,15 @@
-!   
-!   
+!
+!
 !                             AMG4PSBLAS version 1.0
 !    Algebraic Multigrid Package
 !               based on PSBLAS (Parallel Sparse BLAS version 3.5)
-!    
-!    (C) Copyright 2020 
-!  
-!        Salvatore Filippone  
-!        Pasqua D'Ambra   
-!        Fabio Durastante        
-!   
+!
+!    (C) Copyright 2020
+!
+!        Salvatore Filippone
+!        Pasqua D'Ambra
+!        Fabio Durastante
+!
 !    Redistribution and use in source and binary forms, with or without
 !    modification, are permitted provided that the following conditions
 !    are met:
@@ -21,7 +21,7 @@
 !      3. The name of the AMG4PSBLAS group or the names of its contributors may
 !         not be used to endorse or promote products derived from this
 !         software without specific written permission.
-!   
+!
 !    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 !    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 !    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
@@ -33,8 +33,8 @@
 !    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 !    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 !    POSSIBILITY OF SUCH DAMAGE.
-!   
-!  
+!
+!
 ! File: amg_z_prec_mod.f90
 !
 ! Module: amg_z_prec_mod
@@ -52,6 +52,9 @@ module amg_z_prec_mod
   use amg_z_l1_diag_solver
   use amg_z_ilu_solver
   use amg_z_gs_solver
+  use amg_z_ainv_solver
+  use amg_z_invk_solver
+  use amg_z_invt_solver
 
   interface amg_precset
     module procedure amg_z_iprecsetsm, amg_z_iprecsetsv, &
@@ -78,7 +81,7 @@ module amg_z_prec_mod
       ! !$  character, intent(in), optional         :: upd
     end subroutine amg_z_extprol_bld
   end interface amg_extprol_bld
-  
+
 contains
 
   subroutine amg_z_iprecsetsm(p,val,info,pos)
@@ -108,7 +111,7 @@ contains
 
   subroutine amg_z_cprecseti(p,what,val,info,pos)
     type(amg_zprec_type), intent(inout)   :: p
-    character(len=*), intent(in)            :: what 
+    character(len=*), intent(in)            :: what
     integer(psb_ipk_), intent(in)           :: val
     integer(psb_ipk_), intent(out)          :: info
     character(len=*), optional, intent(in)      :: pos
@@ -118,7 +121,7 @@ contains
 
   subroutine amg_z_cprecsetr(p,what,val,info,pos)
     type(amg_zprec_type), intent(inout)   :: p
-    character(len=*), intent(in)            :: what 
+    character(len=*), intent(in)            :: what
     real(psb_dpk_), intent(in)             :: val
     integer(psb_ipk_), intent(out)          :: info
     character(len=*), optional, intent(in)      :: pos
@@ -128,7 +131,7 @@ contains
 
   subroutine amg_z_cprecsetc(p,what,val,info,pos)
     type(amg_zprec_type), intent(inout)   :: p
-    character(len=*), intent(in)            :: what 
+    character(len=*), intent(in)            :: what
     character(len=*), intent(in)            :: val
     integer(psb_ipk_), intent(out)          :: info
     character(len=*), optional, intent(in)      :: pos

amgprec/amg_z_prec_type.f90

@@ -1,15 +1,15 @@
-!  
-!   
+!
+!
 !                             AMG4PSBLAS version 1.0
 !    Algebraic Multigrid Package
 !               based on PSBLAS (Parallel Sparse BLAS version 3.5)
-!    
-!    (C) Copyright 2020 
-!  
-!        Salvatore Filippone  
-!        Pasqua D'Ambra   
-!        Fabio Durastante        
-!   
+!
+!    (C) Copyright 2020
+!
+!        Salvatore Filippone
+!        Pasqua D'Ambra
+!        Fabio Durastante
+!
 !    Redistribution and use in source and binary forms, with or without
 !    modification, are permitted provided that the following conditions
 !    are met:
@@ -21,7 +21,7 @@
 !      3. The name of the AMG4PSBLAS group or the names of its contributors may
 !         not be used to endorse or promote products derived from this
 !         software without specific written permission.
-!   
+!
 !    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 !    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 !    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
@@ -33,21 +33,21 @@
 !    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 !    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 !    POSSIBILITY OF SUCH DAMAGE.
-!   
-!  
+!
+!
 ! File: amg_z_prec_type.f90
 !
 ! Module: amg_z_prec_type
 !
-!  This module defines: 
+!  This module defines:
 !  - the amg_z_prec_type data structure containing the preconditioner and related
 !    data structures;
 !
 !  It contains routines for
-!  - Building and applying; 
+!  - Building and applying;
 !  - checking if the preconditioner is correctly defined;
 !  - printing a	description of the preconditioner;
-!  - deallocating the preconditioner data structure.  
+!  - deallocating the preconditioner data structure.
 !
 
 module amg_z_prec_type
@@ -70,25 +70,25 @@ module amg_z_prec_type
   !  It consists of an array of 'one-level' intermediate data structures
   !  of type amg_zonelev_type, each containing the information needed to apply
   !  the smoothing and the coarse-space correction at a generic level. RT is the
-  !  real data type, i.e. S for both S and C, and D for both D and Z. 
+  !  real data type, i.e. S for both S and C, and D for both D and Z.
   !
   !  type amg_zprec_type
-  !    type(amg_zonelev_type), allocatable :: precv(:) 
+  !    type(amg_zonelev_type), allocatable :: precv(:)
   !  end type amg_zprec_type
-  ! 
+  !
   !  Note that the levels are numbered in increasing order starting from
   !  the level 1 as the finest one, and the number of levels is given by
-  !  size(precv(:))  which is the id of the coarsest level. 
+  !  size(precv(:))  which is the id of the coarsest level.
   !  In the multigrid literature many authors number the levels in the opposite
   !  order, with level 0 being the id of the coarsest level.
   !
   !
   integer, parameter, private :: wv_size_=4
-  
+
   type, extends(psb_zprec_type)        :: amg_zprec_type
     type(amg_daggr_data)                 :: ag_data
     !
-    ! Number of outer sweeps. Sometimes  2 V-cycles may be better than 1 W-cycle. 
+    ! Number of outer sweeps. Sometimes  2 V-cycles may be better than 1 W-cycle.
     !
     integer(psb_ipk_)                  :: outer_sweeps = 1
     !
@@ -97,11 +97,11 @@ module amg_z_prec_type
     ! to keep track against what is put later in the multilevel array
     !
     integer(psb_ipk_)                  :: coarse_solver = -1
-    
+
     !
     ! The multilevel hierarchy
     !
-    type(amg_z_onelev_type), allocatable :: precv(:) 
+    type(amg_z_onelev_type), allocatable :: precv(:)
   contains
     procedure, pass(prec)               :: psb_z_apply2_vect => amg_z_apply2_vect
     procedure, pass(prec)               :: psb_z_apply1_vect => amg_z_apply1_vect
@@ -157,7 +157,7 @@ module amg_z_prec_type
   interface amg_precdescr
     subroutine amg_zfile_prec_descr(prec,iout,root)
       import :: amg_zprec_type, psb_ipk_
-      implicit none 
+      implicit none
       ! Arguments
       class(amg_zprec_type), intent(in)      :: prec
       integer(psb_ipk_), intent(in), optional :: iout
@@ -211,7 +211,7 @@ module amg_z_prec_type
     end subroutine amg_zprecaply1
   end interface
 
-  interface 
+  interface
     subroutine amg_zprecsetsm(prec,val,info,ilev,ilmax,pos)
       import :: psb_zspmat_type, psb_desc_type, psb_dpk_, &
            & amg_zprec_type, amg_z_base_smoother_type, psb_ipk_
@@ -243,7 +243,7 @@ module amg_z_prec_type
       import :: psb_zspmat_type, psb_desc_type, psb_dpk_, &
            & amg_zprec_type, psb_ipk_
       class(amg_zprec_type), intent(inout)   :: prec
-      character(len=*), intent(in)             :: what 
+      character(len=*), intent(in)             :: what
       integer(psb_ipk_), intent(in)            :: val
       integer(psb_ipk_), intent(out)           :: info
       integer(psb_ipk_), optional, intent(in)  :: ilev,ilmax,idx
@@ -253,7 +253,7 @@ module amg_z_prec_type
       import :: psb_zspmat_type, psb_desc_type, psb_dpk_, &
            & amg_zprec_type, psb_ipk_
       class(amg_zprec_type), intent(inout)   :: prec
-      character(len=*), intent(in)             :: what 
+      character(len=*), intent(in)             :: what
       real(psb_dpk_), intent(in)                :: val
       integer(psb_ipk_), intent(out)           :: info
       integer(psb_ipk_), optional, intent(in)  :: ilev,ilmax,idx
@@ -263,7 +263,7 @@ module amg_z_prec_type
       import :: psb_zspmat_type, psb_desc_type, psb_dpk_, &
            & amg_zprec_type, psb_ipk_
       class(amg_zprec_type), intent(inout)   :: prec
-      character(len=*), intent(in)             :: what 
+      character(len=*), intent(in)             :: what
       character(len=*), intent(in)             :: string
       integer(psb_ipk_), intent(out)           :: info
       integer(psb_ipk_), optional, intent(in)  :: ilev,ilmax,idx
@@ -341,28 +341,28 @@ module amg_z_prec_type
       !      character, intent(in),optional             :: upd
     end subroutine amg_z_smoothers_bld
   end interface amg_smoothers_bld
-  
+
 contains
   !
   ! Function returning a pointer to the smoother
   !
   function amg_z_get_smootherp(prec,ilev) result(val)
-    implicit none 
+    implicit none
     class(amg_zprec_type), target, intent(in) :: prec
     integer(psb_ipk_), optional                 :: ilev
     class(amg_z_base_smoother_type), pointer  :: val
     integer(psb_ipk_)        :: ilev_
-    
+
     val => null()
-    if (present(ilev)) then 
+    if (present(ilev)) then
       ilev_ = ilev
     else
-      ! What is a good default? 
+      ! What is a good default?
       ilev_ = 1
     end if
-    if (allocated(prec%precv)) then 
-      if ((1<=ilev_).and.(ilev_<=size(prec%precv))) then 
-        if (allocated(prec%precv(ilev_)%sm)) then 
+    if (allocated(prec%precv)) then
+      if ((1<=ilev_).and.(ilev_<=size(prec%precv))) then
+        if (allocated(prec%precv(ilev_)%sm)) then
           val => prec%precv(ilev_)%sm
         end if
       end if
@@ -372,23 +372,23 @@ contains
   ! Function returning a pointer to the solver
   !
   function amg_z_get_solverp(prec,ilev) result(val)
-    implicit none 
+    implicit none
     class(amg_zprec_type), target, intent(in) :: prec
     integer(psb_ipk_), optional                 :: ilev
     class(amg_z_base_solver_type), pointer  :: val
     integer(psb_ipk_)        :: ilev_
-    
+
     val => null()
-    if (present(ilev)) then 
+    if (present(ilev)) then
       ilev_ = ilev
     else
-      ! What is a good default? 
+      ! What is a good default?
       ilev_ = 1
     end if
-    if (allocated(prec%precv)) then 
-      if ((1<=ilev_).and.(ilev_<=size(prec%precv))) then 
-        if (allocated(prec%precv(ilev_)%sm)) then 
-          if (allocated(prec%precv(ilev_)%sm%sv)) then 
+    if (allocated(prec%precv)) then
+      if ((1<=ilev_).and.(ilev_<=size(prec%precv))) then
+        if (allocated(prec%precv(ilev_)%sm)) then
+          if (allocated(prec%precv(ilev_)%sm%sv)) then
             val => prec%precv(ilev_)%sm%sv
           end if
         end if
@@ -399,25 +399,25 @@ contains
   ! Function returning the size of the precv(:) array
   !
   function amg_z_get_nlevs(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_zprec_type), intent(in) :: prec
     integer(psb_ipk_) :: val
     val = 0
-    if (allocated(prec%precv)) then 
+    if (allocated(prec%precv)) then
       val = size(prec%precv)
     end if
   end function amg_z_get_nlevs
   !
   ! Function returning the size of the amg_prec_type data structure
-  ! in bytes or in number of nonzeros of the operator(s) involved. 
+  ! in bytes or in number of nonzeros of the operator(s) involved.
   !
   function amg_z_get_nzeros(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_zprec_type), intent(in) :: prec
     integer(psb_epk_) :: val
     integer(psb_ipk_)        :: i
     val = 0
-    if (allocated(prec%precv)) then 
+    if (allocated(prec%precv)) then
       do i=1, size(prec%precv)
         val = val + prec%precv(i)%get_nzeros()
       end do
@@ -425,13 +425,13 @@ contains
   end function amg_z_get_nzeros
 
   function amg_zprec_sizeof(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_zprec_type), intent(in) :: prec
     integer(psb_epk_) :: val
     integer(psb_ipk_)        :: i
     val = 0
     val = val + psb_sizeof_ip
-    if (allocated(prec%precv)) then 
+    if (allocated(prec%precv)) then
       do i=1, size(prec%precv)
         val = val + prec%precv(i)%sizeof()
       end do
@@ -444,40 +444,40 @@ contains
   ! various level to the nonzeroes at the fine level
   ! (original matrix)
   !
-  
+
   function amg_z_get_compl(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_zprec_type), intent(in) :: prec
     complex(psb_dpk_)  :: val
-    
+
     val = prec%ag_data%op_complexity
 
   end function amg_z_get_compl
-  
-  subroutine amg_z_cmp_compl(prec) 
 
-    implicit none 
+  subroutine amg_z_cmp_compl(prec)
+
+    implicit none
     class(amg_zprec_type), intent(inout) :: prec
-    
+
     real(psb_dpk_) :: num, den, nmin
     type(psb_ctxt_type) :: ctxt
-    integer(psb_ipk_)   :: il 
+    integer(psb_ipk_)   :: il
 
     num = -done
     den = done
     ctxt = prec%ctxt
-    if (allocated(prec%precv)) then 
+    if (allocated(prec%precv)) then
       il  = 1
       num = prec%precv(il)%base_a%get_nzeros()
       if (num >= dzero) then
-        den = num 
+        den = num
         do il=2,size(prec%precv)
           num = num + max(0,prec%precv(il)%base_a%get_nzeros())
         end do
       end if
     end if
     nmin = num
-    call psb_min(ctxt,nmin) 
+    call psb_min(ctxt,nmin)
     if (nmin < dzero) then
       num = dzero
       den = done
@@ -487,25 +487,25 @@ contains
     end if
     prec%ag_data%op_complexity = num/den
   end subroutine amg_z_cmp_compl
-  
+
   !
   ! Average coarsening ratio
   !
-  
+
   function amg_z_get_avg_cr(prec) result(val)
-    implicit none 
+    implicit none
     class(amg_zprec_type), intent(in) :: prec
     complex(psb_dpk_)  :: val
-    
+
     val = prec%ag_data%avg_cr
 
   end function amg_z_get_avg_cr
-  
-  subroutine amg_z_cmp_avg_cr(prec) 
 
-    implicit none 
+  subroutine amg_z_cmp_avg_cr(prec)
+
+    implicit none
     class(amg_zprec_type), intent(inout) :: prec
-    
+
     real(psb_dpk_)    :: avgcr
     type(psb_ctxt_type) :: ctxt
     integer(psb_ipk_)   :: il, nl, iam, np
@@ -519,12 +519,12 @@ contains
       do il=2,nl
         avgcr = avgcr + max(dzero,prec%precv(il)%szratio)
       end do
-      avgcr = avgcr / (nl-1)      
+      avgcr = avgcr / (nl-1)
     end if
-    call psb_sum(ctxt,avgcr) 
+    call psb_sum(ctxt,avgcr)
     prec%ag_data%avg_cr = avgcr/np
   end subroutine amg_z_cmp_avg_cr
-  
+
   !
   ! Subroutines: amg_Tprec_free
   ! Version: complex
@@ -538,74 +538,74 @@ contains
   !             error code.
   !
   subroutine amg_zprecfree(p,info)
-  
+
     implicit none
-    
+
     ! Arguments
     type(amg_zprec_type), intent(inout) :: p
     integer(psb_ipk_), intent(out)        :: info
-    
+
     ! Local variables
     integer(psb_ipk_)   :: me,err_act,i
     character(len=20)   :: name
-    
+
     info=psb_success_
     name = 'amg_zprecfree'
     call psb_erractionsave(err_act)
     if (psb_errstatus_fatal()) then
       info = psb_err_internal_error_; return
     end if
-    
+
     me=-1
-    
+
     call p%free(info)
 
-    
+
     return
-    
+
   end subroutine amg_zprecfree
 
   subroutine amg_z_prec_free(prec,info)
-    
+
     implicit none
-    
+
     ! Arguments
     class(amg_zprec_type), intent(inout) :: prec
     integer(psb_ipk_), intent(out)        :: info
-    
+
     ! Local variables
     integer(psb_ipk_)   :: me,err_act,i
     character(len=20)   :: name
-    
+
     info=psb_success_
     name = 'amg_zprecfree'
     call psb_erractionsave(err_act)
     if (psb_errstatus_fatal()) then
       info = psb_err_internal_error_; goto 9999
     end if
-    
+
     me=-1
-    if (allocated(prec%precv)) then 
-      do i=1,size(prec%precv) 
+    if (allocated(prec%precv)) then
+      do i=1,size(prec%precv)
         call prec%precv(i)%free(info)
       end do
       deallocate(prec%precv,stat=info)
     end if
     call psb_erractionrestore(err_act)
     return
-    
+
 9999 call psb_error_handler(err_act)
     return
-    
+
   end subroutine amg_z_prec_free
 
-  
+
 
   !
-  ! Top level methods. 
+  ! Top level methods.
   !
   subroutine amg_z_apply2_vect(prec,x,y,desc_data,info,trans,work)
-    implicit none 
+    implicit none
     type(psb_desc_type),intent(in)        :: desc_data
     class(amg_zprec_type), intent(inout)  :: prec
     type(psb_z_vect_type),intent(inout)   :: x
@@ -618,13 +618,13 @@ contains
 
     call psb_erractionsave(err_act)
 
-    select type(prec) 
+    select type(prec)
     type is (amg_zprec_type)
       call amg_precapply(prec,x,y,desc_data,info,trans,work)
     class default
       info = psb_err_missing_override_method_
       call psb_errpush(info,name)
-      goto 9999 
+      goto 9999
     end select
 
     call psb_erractionrestore(err_act)
@@ -636,7 +636,7 @@ contains
   end subroutine amg_z_apply2_vect
 
   subroutine amg_z_apply1_vect(prec,x,desc_data,info,trans,work)
-    implicit none 
+    implicit none
     type(psb_desc_type),intent(in)          :: desc_data
     class(amg_zprec_type), intent(inout)  :: prec
     type(psb_z_vect_type),intent(inout)   :: x
@@ -648,13 +648,13 @@ contains
 
     call psb_erractionsave(err_act)
 
-    select type(prec) 
+    select type(prec)
     type is (amg_zprec_type)
       call amg_precapply(prec,x,desc_data,info,trans,work)
     class default
       info = psb_err_missing_override_method_
       call psb_errpush(info,name)
-      goto 9999 
+      goto 9999
     end select
 
     call psb_erractionrestore(err_act)
@@ -667,7 +667,7 @@ contains
 
 
   subroutine amg_z_apply2v(prec,x,y,desc_data,info,trans,work)
-    implicit none 
+    implicit none
     type(psb_desc_type),intent(in)    :: desc_data
     class(amg_zprec_type), intent(inout) :: prec
     complex(psb_dpk_),intent(inout)      :: x(:)
@@ -680,13 +680,13 @@ contains
 
     call psb_erractionsave(err_act)
 
-    select type(prec) 
+    select type(prec)
     type is (amg_zprec_type)
       call amg_precapply(prec,x,y,desc_data,info,trans,work)
     class default
       info = psb_err_missing_override_method_
       call psb_errpush(info,name)
-      goto 9999 
+      goto 9999
     end select
 
     call psb_erractionrestore(err_act)
@@ -698,7 +698,7 @@ contains
   end subroutine amg_z_apply2v
 
   subroutine amg_z_apply1v(prec,x,desc_data,info,trans)
-    implicit none 
+    implicit none
     type(psb_desc_type),intent(in)    :: desc_data
     class(amg_zprec_type), intent(inout) :: prec
     complex(psb_dpk_),intent(inout)      :: x(:)
@@ -709,13 +709,13 @@ contains
 
     call psb_erractionsave(err_act)
 
-    select type(prec) 
+    select type(prec)
     type is (amg_zprec_type)
       call amg_precapply(prec,x,desc_data,info,trans)
     class default
       info = psb_err_missing_override_method_
       call psb_errpush(info,name)
-      goto 9999 
+      goto 9999
     end select
 
     call psb_erractionrestore(err_act)
@@ -730,8 +730,8 @@ contains
   subroutine amg_z_dump(prec,info,istart,iend,iproc,prefix,head,&
        & ac,rp,smoother,solver,tprol,&
        & global_num)
-    
-    implicit none 
+
+    implicit none
     class(amg_zprec_type), intent(in)     :: prec
     integer(psb_ipk_), intent(out)          :: info
     integer(psb_ipk_), intent(in), optional :: istart, iend, iproc
@@ -742,27 +742,26 @@ contains
     integer(psb_ipk_)   :: iam, np, iproc_
     character(len=80)   :: prefix_
     character(len=120)  :: fname ! len should be at least 20 more than
-    !  len of prefix_ 
+    !  len of prefix_
 
     info = 0
     ctxt = prec%ctxt
     call psb_info(ctxt,iam,np)
-    
     iln = size(prec%precv)
-    if (present(istart)) then 
+    if (present(istart)) then
       il1 = max(1,istart)
     else
       il1 = min(2,iln)
     end if
-    if (present(iend)) then 
+    if (present(iend)) then
       iln = min(iln, iend)
     end if
     iproc_ = -1
-    if (present(iproc)) then 
+    if (present(iproc)) then
       iproc_ = iproc
     end if
 
-    if ((iproc_ == -1).or.(iproc_==iam)) then 
+    if ((iproc_ == -1).or.(iproc_==iam)) then
       do lev=il1, iln
         call prec%precv(lev)%dump(lev,info,prefix=prefix,head=head,&
              & ac=ac,smoother=smoother,solver=solver,rp=rp,tprol=tprol, &
@@ -773,7 +772,7 @@ contains
 
   subroutine amg_z_cnv(prec,info,amold,vmold,imold)
 
-    implicit none 
+    implicit none
     class(amg_zprec_type), intent(inout) :: prec
     integer(psb_ipk_), intent(out)       :: info
     class(psb_z_base_sparse_mat), intent(in), optional :: amold
@@ -781,7 +780,7 @@ contains
     class(psb_i_base_vect_type), intent(in), optional  :: imold
 
     integer(psb_ipk_) :: i
-    
+
     info = psb_success_
     if (allocated(prec%precv)) then
       do i=1,size(prec%precv)
@@ -789,24 +788,24 @@ contains
              & call prec%precv(i)%cnv(info,amold=amold,vmold=vmold,imold=imold)
       end do
     end if
-    
+
   end subroutine amg_z_cnv
 
   subroutine amg_z_clone(prec,precout,info)
 
-    implicit none 
+    implicit none
     class(amg_zprec_type), intent(inout) :: prec
     class(psb_zprec_type), intent(inout) :: precout
     integer(psb_ipk_), intent(out)       :: info
-    
+
     call precout%free(info)
-    if (info == 0) call amg_z_inner_clone(prec,precout,info) 
+    if (info == 0) call amg_z_inner_clone(prec,precout,info)
 
   end subroutine amg_z_clone
 
   subroutine amg_z_inner_clone(prec,precout,info)
 
-    implicit none 
+    implicit none
     class(amg_zprec_type), intent(inout)         :: prec
     class(psb_zprec_type), target, intent(inout) :: precout
     integer(psb_ipk_), intent(out)             :: info
@@ -821,17 +820,17 @@ contains
       pout%ctxt          = prec%ctxt
       pout%ag_data       = prec%ag_data
       pout%outer_sweeps  = prec%outer_sweeps
-      if (allocated(prec%precv)) then 
-        ln = size(prec%precv) 
+      if (allocated(prec%precv)) then
+        ln = size(prec%precv)
         allocate(pout%precv(ln),stat=info)
         if (info /= psb_success_) goto 9999
-        if (ln >= 1) then 
+        if (ln >= 1) then
           call prec%precv(1)%clone(pout%precv(1),info)
         end if
         do lev=2, ln
           if (info /= psb_success_) exit
           call prec%precv(lev)%clone(pout%precv(lev),info)
-          if (info == psb_success_) then 
+          if (info == psb_success_) then
             pout%precv(lev)%base_a       => pout%precv(lev)%ac
             pout%precv(lev)%base_desc    => pout%precv(lev)%desc_ac
             pout%precv(lev)%linmap%p_desc_U => pout%precv(lev-1)%base_desc
@@ -842,7 +841,7 @@ contains
       if (allocated(prec%precv(1)%wrk)) &
            & call pout%allocate_wrk(info,vmold=prec%precv(1)%wrk%vx2l%v)
 
-    class default 
+    class default
       write(0,*) 'Error: wrong out type'
       info = psb_err_invalid_input_
     end select
@@ -854,14 +853,14 @@ contains
     implicit none
     class(amg_zprec_type), intent(inout) :: prec
     class(amg_zprec_type), intent(inout), target :: b
-    integer(psb_ipk_), intent(out) :: info 
+    integer(psb_ipk_), intent(out) :: info
     integer(psb_ipk_) :: i
-    
-    if (same_type_as(prec,b)) then 
-      if (allocated(b%precv)) then 
+
+    if (same_type_as(prec,b)) then
+      if (allocated(b%precv)) then
         ! This might not be required if FINAL procedures are available.
         call b%free(info)
-        if (info /= psb_success_) then 
+        if (info /= psb_success_) then
           !?????
 !!$        return
         endif
@@ -869,7 +868,7 @@ contains
       b%ctxt         = prec%ctxt
       b%ag_data       = prec%ag_data
       b%outer_sweeps  = prec%outer_sweeps
-            
+
       call move_alloc(prec%precv,b%precv)
       ! Fix the pointers except on level 1.
       do i=2, size(b%precv)
@@ -878,7 +877,7 @@ contains
         b%precv(i)%linmap%p_desc_U => b%precv(i-1)%base_desc
         b%precv(i)%linmap%p_desc_V => b%precv(i)%base_desc
       end do
-            
+
     else
       write(0,*) 'Warning: PREC%move_alloc onto different type?'
       info = psb_err_internal_error_
@@ -888,7 +887,7 @@ contains
   subroutine amg_z_allocate_wrk(prec,info,vmold,desc)
     use psb_base_mod
     implicit none
-    
+
     ! Arguments
     class(amg_zprec_type), intent(inout) :: prec
     integer(psb_ipk_), intent(out)        :: info
@@ -896,37 +895,37 @@ contains
     !
     ! In MLD the DESC optional argument is ignored, since
     ! the necessary info is contained in the various entries of the
-    ! PRECV component. 
+    ! PRECV component.
     type(psb_desc_type), intent(in), optional  :: desc
-    
+
     ! Local variables
     integer(psb_ipk_)   :: me,err_act,i,j,level,nlev, nc2l
     character(len=20)   :: name
-    
+
     info=psb_success_
     name = 'amg_z_allocate_wrk'
     call psb_erractionsave(err_act)
     if (psb_errstatus_fatal()) then
       info = psb_err_internal_error_; goto 9999
     end if
-    nlev   = size(prec%precv)  
+    nlev   = size(prec%precv)
     level = 1
     do level = 1, nlev
       call prec%precv(level)%allocate_wrk(info,vmold=vmold)
-      if (psb_errstatus_fatal()) then 
+      if (psb_errstatus_fatal()) then
         nc2l = prec%precv(level)%base_desc%get_local_cols()
         info=psb_err_alloc_request_
         call psb_errpush(info,name,i_err=(/2*nc2l/), a_err='complex(psb_dpk_)')
-        goto 9999      
+        goto 9999
       end if
     end do
 
     call psb_erractionrestore(err_act)
     return
-    
+
 9999 call psb_error_handler(err_act)
     return
-    
+
   end subroutine amg_z_allocate_wrk
 
   subroutine amg_z_free_wrk(prec,info)
@@ -948,13 +947,13 @@ contains
       info = psb_err_internal_error_; goto 9999
     end if
 
-    if (allocated(prec%precv)) then 
-      nlev   = size(prec%precv)  
+    if (allocated(prec%precv)) then
+      nlev   = size(prec%precv)
       do level = 1, nlev
         call prec%precv(level)%free_wrk(info)
       end do
     end if
-    
+
     call psb_erractionrestore(err_act)
     return
 
@@ -966,7 +965,7 @@ contains
   function amg_z_is_allocated_wrk(prec) result(res)
     use psb_base_mod
     implicit none
-    
+
     ! Arguments
     class(amg_zprec_type), intent(in) :: prec
     logical :: res
@@ -974,7 +973,7 @@ contains
     res = .false.
     if (.not.allocated(prec%precv)) return
     res = allocated(prec%precv(1)%wrk)
-     
+
   end function amg_z_is_allocated_wrk
 
 end module amg_z_prec_type

amgprec/impl/solver/Makefile

@@ -1,7 +1,7 @@
 include ../../../Make.inc
 LIBDIR=../../../lib
 INCDIR=../../../include
-MODDIR=../../../modules 
+MODDIR=../../../modules
 HERE=../..
 FINCLUDES=$(FMFLAG)$(HERE) $(FMFLAG)$(MODDIR) $(FMFLAG)$(INCDIR) $(PSBLAS_INCLUDES)
 
@@ -191,15 +191,124 @@ amg_z_ilu_solver_dmp.o \
 amg_z_mumps_solver_apply.o \
 amg_z_mumps_solver_apply_vect.o \
 amg_z_mumps_solver_bld.o \
-
+amg_s_ainv_solver_bld.o \
+amg_s_ainv_solver_check.o \
+amg_s_ainv_solver_clone.o \
+amg_s_ainv_solver_csetc.o \
+amg_s_ainv_solver_cseti.o \
+amg_s_ainv_solver_csetr.o \
+amg_s_ainv_solver_descr.o \
+amg_s_ainv_solver_setc.o \
+amg_s_ainv_solver_seti.o \
+amg_s_ainv_solver_setr.o \
+amg_d_ainv_solver_bld.o \
+amg_d_ainv_solver_check.o \
+amg_d_ainv_solver_clone.o \
+amg_d_ainv_solver_csetc.o \
+amg_d_ainv_solver_cseti.o \
+amg_d_ainv_solver_csetr.o \
+amg_d_ainv_solver_descr.o \
+amg_d_ainv_solver_setc.o \
+amg_d_ainv_solver_seti.o \
+amg_d_ainv_solver_setr.o \
+amg_c_ainv_solver_bld.o \
+amg_c_ainv_solver_check.o \
+amg_c_ainv_solver_clone.o \
+amg_c_ainv_solver_csetc.o \
+amg_c_ainv_solver_cseti.o \
+amg_c_ainv_solver_csetr.o \
+amg_c_ainv_solver_descr.o \
+amg_c_ainv_solver_setc.o \
+amg_c_ainv_solver_seti.o \
+amg_c_ainv_solver_setr.o \
+amg_s_base_ainv_solver_apply_vect.o \
+amg_s_base_ainv_solver_apply.o \
+amg_s_base_ainv_solver_cnv.o \
+amg_s_base_ainv_solver_dmp.o \
+amg_s_base_ainv_solver_free.o \
+amg_s_base_ainv_update_a.o \
+amg_d_base_ainv_solver_apply_vect.o \
+amg_d_base_ainv_solver_apply.o \
+amg_d_base_ainv_solver_cnv.o \
+amg_d_base_ainv_solver_dmp.o \
+amg_d_base_ainv_solver_free.o \
+amg_d_base_ainv_update_a.o \
+amg_c_base_ainv_solver_apply_vect.o \
+amg_c_base_ainv_solver_apply.o \
+amg_c_base_ainv_solver_cnv.o \
+amg_c_base_ainv_solver_dmp.o \
+amg_c_base_ainv_solver_free.o \
+amg_c_base_ainv_update_a.o \
+amg_z_base_ainv_solver_apply_vect.o \
+amg_z_base_ainv_solver_apply.o \
+amg_z_base_ainv_solver_cnv.o \
+amg_z_base_ainv_solver_dmp.o \
+amg_z_base_ainv_solver_free.o \
+amg_z_base_ainv_update_a.o \
+amg_d_invt_solver_bld.o \
+amg_d_invt_solver_check.o \
+amg_d_invt_solver_clone.o \
+amg_d_invt_solver_cseti.o \
+amg_d_invt_solver_csetr.o \
+amg_d_invt_solver_descr.o \
+amg_d_invt_solver_seti.o \
+amg_d_invt_solver_setr.o \
+amg_d_invk_solver_bld.o \
+amg_d_invk_solver_check.o \
+amg_d_invk_solver_clone.o \
+amg_d_invk_solver_cseti.o \
+amg_d_invk_solver_descr.o \
+amg_d_invk_solver_seti.o \
+amg_s_invt_solver_bld.o \
+amg_s_invt_solver_check.o \
+amg_s_invt_solver_clone.o \
+amg_s_invt_solver_cseti.o \
+amg_s_invt_solver_csetr.o \
+amg_s_invt_solver_descr.o \
+amg_s_invt_solver_seti.o \
+amg_s_invt_solver_setr.o \
+amg_s_invk_solver_bld.o \
+amg_s_invk_solver_check.o \
+amg_s_invk_solver_clone.o \
+amg_s_invk_solver_cseti.o \
+amg_s_invk_solver_descr.o \
+amg_s_invk_solver_seti.o \
+amg_c_invt_solver_bld.o \
+amg_c_invt_solver_check.o \
+amg_c_invt_solver_clone.o \
+amg_c_invt_solver_cseti.o \
+amg_c_invt_solver_csetr.o \
+amg_c_invt_solver_descr.o \
+amg_c_invt_solver_seti.o \
+amg_c_invt_solver_setr.o \
+amg_c_invk_solver_bld.o \
+amg_c_invk_solver_check.o \
+amg_c_invk_solver_clone.o \
+amg_c_invk_solver_cseti.o \
+amg_c_invk_solver_descr.o \
+amg_c_invk_solver_seti.o \
+amg_z_invt_solver_bld.o \
+amg_z_invt_solver_check.o \
+amg_z_invt_solver_clone.o \
+amg_z_invt_solver_cseti.o \
+amg_z_invt_solver_csetr.o \
+amg_z_invt_solver_descr.o \
+amg_z_invt_solver_seti.o \
+amg_z_invt_solver_setr.o \
+amg_z_invk_solver_bld.o \
+amg_z_invk_solver_check.o \
+amg_z_invk_solver_clone.o \
+amg_z_invk_solver_cseti.o \
+amg_z_invk_solver_descr.o \
+amg_z_invk_solver_seti.o
 
 LIBNAME=libamg_prec.a
 
-lib:  $(OBJS) 
+lib:  $(OBJS)
 	$(AR) $(HERE)/$(LIBNAME) $(OBJS)
 	$(RANLIB) $(HERE)/$(LIBNAME)
 
-mpobjs: 
+mpobjs:
 	(make $(MPFOBJS) FC="$(MPFC)" FCOPT="$(FCOPT)")
 	(make $(MPCOBJS) CC="$(MPCC)" CCOPT="$(CCOPT)")
 
@@ -208,4 +317,3 @@ veryclean: clean
 
 clean:
 	/bin/rm -f $(OBJS) $(LOCAL_MODS)
-

amgprec/impl/solver/amg_c_ainv_solver_bld.f90

@@ -0,0 +1,98 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_ainv_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+
+
+  use psb_base_mod
+  use psb_c_ainv_fact_mod
+  use amg_c_ainv_solver, amg_protect_name => amg_c_ainv_solver_bld
+
+  Implicit None
+
+  ! Arguments
+  type(psb_cspmat_type), intent(in), target    :: a
+  Type(psb_desc_type), Intent(inout)           :: desc_a
+  class(amg_c_ainv_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(out)                      :: info
+  type(psb_cspmat_type), intent(in), target, optional :: b
+  class(psb_c_base_sparse_mat), intent(in), optional  :: amold
+  class(psb_c_base_vect_type), intent(in), optional   :: vmold
+  class(psb_i_base_vect_type), intent(in), optional   :: imold
+  ! Local variables
+  integer(psb_ipk_)  :: n_row,n_col, nrow_a, nztota
+  complex(psb_spk_), pointer :: ww(:), aux(:), tx(:),ty(:)
+  integer(psb_ipk_)  :: np,me,i, err_act, debug_unit, debug_level
+  type(psb_ctxt_type) :: ctxt
+  character(len=20)  :: name='amg_c_ainv_solver_bld', ch_err
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+  debug_unit  = psb_get_debug_unit()
+  debug_level = psb_get_debug_level()
+  ctxt       = desc_a%get_context()
+  call psb_info(ctxt, me, np)
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) me,' ',trim(name),' start'
+
+  call psb_c_ainv_bld(a,sv%alg,sv%fill_in,sv%thresh,&
+       & sv%w,sv%d,sv%z,desc_a,info,b,iscale=amg_ilu_scale_maxval_)
+
+  if ((info == psb_success_) .and.present(amold)) then
+    call sv%w%set_asb()
+    call sv%w%trim()
+    call sv%z%set_asb()
+    call sv%z%trim()
+    call sv%w%cscnv(info,mold=amold)
+    if (info == psb_success_) &
+         & call sv%z%cscnv(info,mold=amold)
+  end if
+
+  if (info == psb_success_) &
+       & call sv%dv%bld(sv%d,mold=vmold)
+
+  if (info /= psb_success_) then
+    call psb_errpush(psb_err_internal_error_,name)
+    goto 9999
+  end if
+
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) me,' ',trim(name),' end'
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_ainv_solver_bld

amgprec/impl/solver/amg_c_ainv_solver_check.f90

@@ -0,0 +1,65 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_ainv_solver_check(sv,info)
+
+
+  use psb_base_mod
+  use amg_c_ainv_solver, amg_protect_name => amg_c_ainv_solver_check
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_ainv_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='amg_c_ainv_solver_check'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+
+  call amg_check_def(sv%fill_in,&
+       & 'Nzmin',ione,is_positive_nz_min)
+  call amg_check_def(sv%thresh,&
+       & 'Eps',szero,is_legal_s_fact_thrs)
+
+  if (info /= psb_success_) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_ainv_solver_check

amgprec/impl/solver/amg_c_ainv_solver_clone.f90

@@ -0,0 +1,91 @@
+!
+!
+!                             AMG4PSBLAS version 1.0
+!    MultiLevel Domain Decomposition Parallel Preconditioners Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.0)
+!
+!    (C) Copyright 2008,2009,2010,2010,2012
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!                        Alfredo Buttari      CNRS-IRIT, Toulouse
+!                        Pasqua D'Ambra       ICAR-CNR, Naples
+!                        Daniela di Serafino  Second University of Naples
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_ainv_solver_clone(sv,svout,info)
+
+  use psb_base_mod
+  use amg_c_ainv_solver, amg_protect_name => amg_c_ainv_solver_clone
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_ainv_solver_type), intent(inout)              :: sv
+  class(amg_c_base_solver_type), allocatable, intent(inout) :: svout
+  integer(psb_ipk_), intent(out)                            :: info
+  ! Local variables
+  integer(psb_ipk_) :: err_act
+
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+
+  if (allocated(svout)) then
+    call svout%free(info)
+    if (info == psb_success_) deallocate(svout, stat=info)
+  end if
+  if (info == psb_success_) &
+       & allocate(amg_c_ainv_solver_type :: svout, stat=info)
+  if (info /= 0) then
+    info = psb_err_alloc_dealloc_
+    goto 9999
+  end if
+  select type(svo => svout)
+  type is (amg_c_ainv_solver_type)
+    svo%alg      = sv%alg
+    svo%fill_in  = sv%fill_in
+    svo%thresh   = sv%thresh
+    call psb_safe_ab_cpy(sv%d,svo%d,info)
+    if (info == psb_success_) &
+         & call sv%dv%clone(svo%dv,info)
+    if (info == psb_success_) &
+         & call sv%w%clone(svo%w,info)
+    if (info == psb_success_) &
+         & call sv%z%clone(svo%z,info)
+
+  class default
+    info = psb_err_internal_error_
+  end select
+
+  if (info /= 0) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_ainv_solver_clone

amgprec/impl/solver/amg_c_ainv_solver_csetc.f90

@@ -0,0 +1,79 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_ainv_solver_csetc(sv,what,val,info,idx)
+
+
+  use psb_base_mod
+  use amg_c_ainv_solver, amg_protect_name => amg_c_ainv_solver_csetc
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_ainv_solver_type), intent(inout) :: sv
+  character(len=*), intent(in)                 :: what
+  character(len=*), intent(in)                 :: val
+  integer(psb_ipk_), intent(out)               :: info
+  integer(psb_ipk_), intent(in), optional      :: idx
+  !
+  integer(psb_ipk_ ) :: err_act, ival
+  character(len=20)  :: name='amg_c_ainv_solver_setc'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+!!$  select case(psb_toupper(trim(what)))
+!!$  case('AINV_ALG')
+!!$    sv%alg  = sv%stringval(val)
+!!$  case default
+!!$    call sv%mld_d_base_solver_type%set(what,val,info)
+!!$  end select
+  ival =  sv%stringval(val)
+
+  if (ival >=0) then
+    call sv%set(what,ival,info)
+  end if
+
+  if (info /= psb_success_) then
+    info = psb_err_from_subroutine_
+    call psb_errpush(info, name)
+    goto 9999
+  end if
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_ainv_solver_csetc

amgprec/impl/solver/amg_c_ainv_solver_cseti.f90

@@ -0,0 +1,69 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_ainv_solver_cseti(sv,what,val,info,idx)
+
+  use psb_base_mod
+  use amg_c_ainv_solver, amg_protect_name => amg_c_ainv_solver_cseti
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_ainv_solver_type), intent(inout) :: sv
+  character(len=*), intent(in)                 :: what
+  integer(psb_ipk_), intent(in)                :: val
+  integer(psb_ipk_), intent(out)               :: info
+  integer(psb_ipk_), intent(in), optional      :: idx
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='amg_c_ainv_solver_cseti'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+  select case(psb_toupper(trim(what)))
+  case('SUB_FILLIN')
+    sv%fill_in  = val
+  case('AINV_ALG')
+    sv%alg      = val
+  case default
+    call sv%amg_c_base_solver_type%set(what,val,info)
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_ainv_solver_cseti

amgprec/impl/solver/amg_c_ainv_solver_csetr.f90

@@ -0,0 +1,67 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_ainv_solver_csetr(sv,what,val,info,idx)
+
+  use psb_base_mod
+  use amg_c_ainv_solver, amg_protect_name => amg_c_ainv_solver_csetr
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_ainv_solver_type), intent(inout) :: sv
+  character(len=*), intent(in)                 :: what
+  real(psb_spk_), intent(in)                   :: val
+  integer(psb_ipk_), intent(out)               :: info
+  integer(psb_ipk_), intent(in), optional      :: idx
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='amg_c_ainv_solver_csetr'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+
+  select case(psb_toupper(what))
+  case('SUB_ILUTHRS')
+    sv%thresh = val
+  case default
+    call sv%amg_c_base_solver_type%set(what,val,info)
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_ainv_solver_csetr

amgprec/impl/solver/amg_c_ainv_solver_descr.f90

@@ -0,0 +1,73 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_ainv_solver_descr(sv,info,iout,coarse)
+
+
+  use psb_base_mod
+  use amg_c_ainv_solver, amg_protect_name => amg_c_ainv_solver_descr
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_ainv_solver_type), intent(in) :: sv
+  integer(psb_ipk_), intent(out)            :: info
+  integer(psb_ipk_), intent(in), optional   :: iout
+  logical, intent(in), optional             :: coarse
+
+  ! Local variables
+  integer(psb_ipk_)      :: err_act
+  integer(psb_ipk_)      :: ictxt, me, np
+  character(len=20), parameter :: name='amg_c_ainv_solver_descr'
+  integer(psb_ipk_)      :: iout_
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+  if (present(iout)) then
+    iout_ = iout
+  else
+    iout_ = 6
+  endif
+
+  write(iout_,*) '  AINV: Approximate Inverse with sparse biconjugation '
+  write(iout_,*) '  Algorithm variant      : ',sv%algname(sv%alg)
+  write(iout_,*) '  Fill level             : ',sv%fill_in
+  write(iout_,*) '  Fill threshold         : ',sv%thresh
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_ainv_solver_descr

amgprec/impl/solver/amg_c_ainv_solver_setc.f90

@@ -0,0 +1,71 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_ainv_solver_setc(sv,what,val,info)
+
+
+  use psb_base_mod
+  use amg_c_ainv_solver, amg_protect_name => amg_c_ainv_solver_setc
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_ainv_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(in)                :: what
+  character(len=*), intent(in)                 :: val
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  integer(psb_ipk_)  :: err_act, ival
+  character(len=20)  :: name='amg_c_ainv_solver_setc'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+  ival =  sv%stringval(val)
+  if (ival >=0) then
+    call sv%set(what,ival,info)
+  end if
+
+  if (info /= psb_success_) then
+    info = psb_err_from_subroutine_
+    call psb_errpush(info, name)
+    goto 9999
+  end if
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_ainv_solver_setc

amgprec/impl/solver/amg_c_ainv_solver_seti.f90

@@ -0,0 +1,70 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_ainv_solver_seti(sv,what,val,info)
+
+
+  use psb_base_mod
+  use amg_c_ainv_solver, amg_protect_name => amg_c_ainv_solver_seti
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_ainv_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(in)                :: what
+  integer(psb_ipk_), intent(in)                :: val
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  integer(psb_ipk_)  :: err_act
+  character(len=20)  :: name='amg_c_ainv_solver_seti'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+  select case(what)
+  case(amg_sub_fillin_)
+    sv%fill_in  = val
+  case(amg_ainv_alg_)
+    sv%alg      = val
+  case default
+!!$      write(0,*) name,': Error: invalid WHAT'
+!!$      info = -2
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_ainv_solver_seti

amgprec/impl/solver/amg_c_ainv_solver_setr.f90

@@ -0,0 +1,69 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_ainv_solver_setr(sv,what,val,info)
+
+
+  use psb_base_mod
+  use amg_c_ainv_solver, amg_protect_name => amg_c_ainv_solver_setr
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_ainv_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(in)                :: what
+  real(psb_spk_), intent(in)                   :: val
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  integer(psb_ipk_)  :: err_act
+  character(len=20)  :: name='amg_c_ainv_solver_setr'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+
+  select case(what)
+  case(amg_sub_iluthrs_)
+    sv%thresh = val
+  case default
+!!$      write(0,*) name,': Error: invalid WHAT'
+!!$      info = -2
+!!$      goto 9999
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_ainv_solver_setr

amgprec/impl/solver/amg_c_base_ainv_solver_apply.f90

@@ -0,0 +1,153 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_base_ainv_solver_apply(alpha,sv,x,beta,y,desc_data,&
+     & trans,work,info,init,initu)
+
+  use psb_base_mod
+  use amg_c_base_ainv_mod, amg_protect_name => amg_c_base_ainv_solver_apply
+  implicit none
+  type(psb_desc_type), intent(in)        :: desc_data
+  class(amg_c_base_ainv_solver_type), intent(inout) :: sv
+  complex(psb_spk_),intent(inout)           :: x(:)
+  complex(psb_spk_),intent(inout)           :: y(:)
+  complex(psb_spk_),intent(in)              :: alpha,beta
+  character(len=1),intent(in)            :: trans
+  complex(psb_spk_),target, intent(inout)   :: work(:)
+  integer(psb_ipk_), intent(out)         :: info
+  character, intent(in), optional        :: init
+  complex(psb_spk_),intent(inout), optional :: initu(:)
+  !
+  integer(psb_ipk_)  :: n_row,n_col
+  complex(psb_spk_), pointer :: ww(:), aux(:), tx(:),ty(:)
+  integer(psb_ipk_)  :: np,me,i, err_act
+  type(psb_ctxt_type)   :: ctxt
+  character          :: trans_
+  character(len=20)  :: name='d_base_ainv_solver_apply'
+
+  call psb_erractionsave(err_act)
+
+  info = psb_success_
+
+  trans_ = psb_toupper(trans)
+  select case(trans_)
+  case('N')
+  case('T','C')
+  case default
+    call psb_errpush(psb_err_iarg_invalid_i_,name)
+    goto 9999
+  end select
+  !
+  ! For non-iterative solvers, init and initu are ignored.
+  !
+
+  n_row = psb_cd_get_local_rows(desc_data)
+  n_col = psb_cd_get_local_cols(desc_data)
+
+  if (n_col <= size(work)) then
+    ww => work(1:n_col)
+    if ((4*n_col+n_col) <= size(work)) then
+      aux => work(n_col+1:)
+    else
+      allocate(aux(4*n_col),stat=info)
+      if (info /= psb_success_) then
+        info=psb_err_alloc_request_
+        call psb_errpush(info,name,i_err=(/4*n_col/),&
+             & a_err='real(psb_dpk_)')
+        goto 9999
+      end if
+    endif
+  else
+    allocate(ww(n_col),aux(4*n_col),stat=info)
+    if (info /= psb_success_) then
+      info=psb_err_alloc_request_
+      call psb_errpush(info,name,i_err=(/5*n_col/),&
+           & a_err='real(psb_dpk_)')
+      goto 9999
+    end if
+  endif
+
+  select case(trans_)
+  case('N')
+    call psb_spmm(cone,sv%w,x,czero,ww,desc_data,info,&
+         & trans=trans_,work=aux,doswap=.false.)
+    ww(1:n_row) = ww(1:n_row) * sv%d(1:n_row)
+    if (info == psb_success_) &
+         & call psb_spmm(alpha,sv%z,ww,beta,y,desc_data,info,&
+         & trans=trans_,work=aux,doswap=.false.)
+
+  case('T','C')
+    call psb_spmm(cone,sv%z,x,czero,ww,desc_data,info,&
+         & trans=trans_,work=aux,doswap=.false.)
+    ww(1:n_row) = ww(1:n_row) * sv%d(1:n_row)
+    if (info == psb_success_) &
+         & call psb_spmm(alpha,sv%w,ww,beta,y,desc_data,info,&
+         & trans=trans_,work=aux,doswap=.false.)
+
+  case default
+    call psb_errpush(psb_err_internal_error_,name,&
+         & a_err='Invalid TRANS in ainv subsolve')
+    goto 9999
+  end select
+
+
+  if (info /= psb_success_) then
+
+    call psb_errpush(psb_err_internal_error_,name,&
+         & a_err='Error in subsolve')
+    goto 9999
+  endif
+
+  if (n_col <= size(work)) then
+    if ((4*n_col+n_col) <= size(work)) then
+    else
+      deallocate(aux,stat=info)
+    endif
+  else
+    deallocate(ww,aux,stat=info)
+  endif
+
+  if (info /= psb_success_) then
+
+    call psb_errpush(psb_err_internal_error_,name,&
+         & a_err='Deallocate')
+    goto 9999
+  endif
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_base_ainv_solver_apply

amgprec/impl/solver/amg_c_base_ainv_solver_apply_vect.f90

@@ -0,0 +1,167 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_base_ainv_solver_apply_vect(alpha,sv,x,beta,y,desc_data,&
+     & trans,work,wv,info,init,initu)
+
+  use psb_base_mod
+  use amg_c_base_ainv_mod, amg_protect_name => amg_c_base_ainv_solver_apply_vect
+  implicit none
+  type(psb_desc_type), intent(in)               :: desc_data
+  class(amg_c_base_ainv_solver_type), intent(inout) :: sv
+  type(psb_c_vect_type), intent(inout)          :: x
+  type(psb_c_vect_type), intent(inout)          :: y
+  complex(psb_spk_), intent(in)                    :: alpha,beta
+  character(len=1), intent(in)                  :: trans
+  complex(psb_spk_),target, intent(inout)          :: work(:)
+  type(psb_c_vect_type),intent(inout)           :: wv(:)
+  integer(psb_ipk_), intent(out)                :: info
+  character, intent(in), optional               :: init
+  type(psb_c_vect_type),intent(inout), optional :: initu
+  !
+  integer(psb_ipk_)     :: n_row,n_col
+  complex(psb_spk_), pointer :: ww(:), aux(:)
+  type(psb_c_vect_type) :: tx,ty
+  integer(psb_ipk_)     :: np,me,i, err_act
+  type(psb_ctxt_type)   :: ctxt
+  character             :: trans_
+  character(len=20)     :: name='d_base_ainv_solver_apply'
+
+  call psb_erractionsave(err_act)
+
+  info = psb_success_
+
+  trans_ = psb_toupper(trans)
+  select case(trans_)
+  case('N')
+  case('T','C')
+  case default
+    call psb_errpush(psb_err_iarg_invalid_i_,name)
+    goto 9999
+  end select
+  !
+  ! For non-iterative solvers, init and initu are ignored.
+  !
+
+  n_row = psb_cd_get_local_rows(desc_data)
+  n_col = psb_cd_get_local_cols(desc_data)
+
+  if (n_col <= size(work)) then
+    ww => work(1:n_col)
+    if ((4*n_col+n_col) <= size(work)) then
+      aux => work(n_col+1:)
+    else
+      allocate(aux(4*n_col),stat=info)
+      if (info /= psb_success_) then
+        info=psb_err_alloc_request_
+        call psb_errpush(info,name,i_err=(/4*n_col/),&
+             & a_err='real(psb_dpk_)')
+        goto 9999
+      end if
+    endif
+  else
+    allocate(ww(n_col),aux(4*n_col),stat=info)
+    if (info /= psb_success_) then
+      info=psb_err_alloc_request_
+      call psb_errpush(info,name,i_err=(/5*n_col/),&
+           & a_err='real(psb_dpk_)')
+      goto 9999
+    end if
+  endif
+
+  if (size(wv) < 2) then
+    info = psb_err_internal_error_
+    call psb_errpush(info,name,&
+         & a_err='invalid wv size')
+    goto 9999
+  end if
+
+
+  associate(tx => wv(1), ty => wv(2))
+
+    select case(trans_)
+    case('N')
+      call psb_spmm(cone,sv%w,x,czero,tx,desc_data,info,&
+           & trans=trans_,work=aux,doswap=.false.)
+      if (info == psb_success_) call ty%mlt(cone,sv%dv,tx,czero,info)
+      if (info == psb_success_) &
+           & call psb_spmm(alpha,sv%z,ty,beta,y,desc_data,info,&
+           & trans=trans_,work=aux,doswap=.false.)
+
+    case('T','C')
+      call psb_spmm(cone,sv%z,x,czero,tx,desc_data,info,&
+           & trans=trans_,work=aux,doswap=.false.)
+      if (info == psb_success_) call ty%mlt(cone,sv%dv,tx,czero,info)
+      if (info == psb_success_) &
+           & call psb_spmm(alpha,sv%w,ty,beta,y,desc_data,info,&
+           & trans=trans_,work=aux,doswap=.false.)
+
+    case default
+      call psb_errpush(psb_err_internal_error_,name,&
+           & a_err='Invalid TRANS in ainv subsolve')
+      goto 9999
+    end select
+
+
+    if (info /= psb_success_) then
+
+      call psb_errpush(psb_err_internal_error_,name,&
+           & a_err='Error in subsolve')
+      goto 9999
+    endif
+
+  end associate
+
+  if (n_col <= size(work)) then
+    if ((4*n_col+n_col) <= size(work)) then
+    else
+      deallocate(aux,stat=info)
+    endif
+  else
+    deallocate(ww,aux,stat=info)
+  endif
+
+  if (info /= psb_success_) then
+
+    call psb_errpush(psb_err_internal_error_,name,&
+         & a_err='Deallocate')
+    goto 9999
+  endif
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_base_ainv_solver_apply_vect

amgprec/impl/solver/amg_c_base_ainv_solver_cnv.f90

@@ -0,0 +1,63 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_base_ainv_solver_cnv(sv,info,amold,vmold,imold)
+  use psb_base_mod
+  use amg_c_base_ainv_mod, amg_protect_name => amg_c_base_ainv_solver_cnv
+  Implicit None
+  ! Arguments
+  class(amg_c_base_ainv_solver_type), intent(inout)  :: sv
+  integer(psb_ipk_), intent(out)                     :: info
+  class(psb_c_base_sparse_mat), intent(in), optional :: amold
+  class(psb_c_base_vect_type), intent(in), optional  :: vmold
+  class(psb_i_base_vect_type), intent(in), optional  :: imold
+
+  !local
+  integer(psb_ipk_)  :: i, j, il1, iln, lname, lev
+  integer(psb_ipk_)  :: iam, np
+  type(psb_ctxt_type)   :: ctxt
+  character(len=80)  :: prefix_
+  character(len=120) :: fname ! len should be at least 20 more than
+  logical :: solver_
+  !  len of prefix_
+
+  info = 0
+
+  if (present(amold)) then
+    call sv%w%cscnv(info,mold=amold)
+    call sv%z%cscnv(info,mold=amold)
+  end if
+  call sv%dv%cnv(mold=vmold)
+
+end subroutine amg_c_base_ainv_solver_cnv

amgprec/impl/solver/amg_c_base_ainv_solver_dmp.f90

@@ -0,0 +1,93 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_base_ainv_solver_dmp(sv,desc,level,info,prefix,head,solver,global_num)
+
+  use psb_base_mod
+  use amg_c_base_ainv_mod, amg_protect_name => amg_c_base_ainv_solver_dmp
+  implicit none
+  class(amg_c_base_ainv_solver_type), intent(in) :: sv
+  type(psb_desc_type), intent(in)             :: desc
+  integer(psb_ipk_), intent(in)              :: level
+  integer(psb_ipk_), intent(out)             :: info
+  character(len=*), intent(in), optional     :: prefix, head
+  logical, optional, intent(in)              :: solver, global_num
+  !
+  integer(psb_ipk_)  :: i, j, il1, iln, lname, lev
+  integer(psb_ipk_)  :: iam, np
+  type(psb_ctxt_type)   :: ctxt
+  character(len=80)  :: prefix_
+  character(len=120) :: fname ! len should be at least 20 more than
+  logical :: solver_, global_num_
+  !  len of prefix_
+
+  info = 0
+
+  if (present(prefix)) then
+    prefix_ = trim(prefix(1:min(len(prefix),len(prefix_))))
+  else
+    prefix_ = "dump_ainv_d"
+  end if
+
+  ctxt = desc%get_context()
+  call psb_info(ctxt,iam,np)
+
+  if (present(solver)) then
+    solver_ = solver
+  else
+    solver_ = .false.
+  end if
+  if (present(global_num)) then
+    global_num_ = global_num
+  else
+    global_num_ = .false.
+  end if
+  lname = len_trim(prefix_)
+  fname = trim(prefix_)
+  write(fname(lname+1:lname+5),'(a,i3.3)') '_p',iam
+  lname = lname + 5
+
+  if (solver_) then
+    write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_wmat.mtx'
+    if (sv%w%is_asb()) &
+         & call sv%w%print(fname,head=head)
+    write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_diag.mtx'
+    if (allocated(sv%d)) &
+         & call psb_geprt(fname,sv%d,head=head)
+    write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_zmat.mtx'
+    if (sv%z%is_asb()) &
+         & call sv%z%print(fname,head=head)
+  end if
+
+end subroutine amg_c_base_ainv_solver_dmp

amgprec/impl/solver/amg_c_base_ainv_solver_free.f90

@@ -0,0 +1,70 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_base_ainv_solver_free(sv,info)
+
+  use psb_base_mod
+  use amg_c_base_ainv_mod, amg_protect_name => amg_c_base_ainv_solver_free
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_base_ainv_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(out)                    :: info
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='amg_c_base_ainv_solver_free'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+  call sv%clear_data(info)
+
+  if (allocated(sv%d)) then
+    deallocate(sv%d,stat=info)
+    if (info /= psb_success_) then
+      info = psb_err_alloc_dealloc_
+      call psb_errpush(info,name)
+      goto 9999
+    end if
+  end if
+  call sv%w%free()
+  call sv%z%free()
+  call sv%dv%free(info)
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_base_ainv_solver_free

amgprec/impl/solver/amg_c_base_ainv_update_a.f90

@@ -0,0 +1,81 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_base_ainv_update_a(sv,x,desc_data,info)
+  use amg_c_base_ainv_mod, amg_protect_name => amg_c_base_ainv_update_a
+  use psb_base_mod
+
+  implicit none
+
+  type(psb_desc_type), intent(in)            :: desc_data
+  class(amg_c_base_ainv_solver_type), intent(inout) :: sv
+  complex(psb_spk_),intent(in)                  :: x(:)
+  integer(psb_ipk_), intent(out)             :: info
+
+  ! Local variables
+  complex(psb_spk_), allocatable   :: dd(:), ee(:)
+  integer(psb_ipk_) :: nrows, ncols, i, j, k, nzr, nzc, ir, ic
+
+  type(psb_c_csc_sparse_mat) :: ac
+  type(psb_c_csr_sparse_mat) :: ar
+
+  dd = sv%dv%get_vect()
+  if (size(x)<size(dd)) then
+    write(0,*) 'Wrong size in update',size(x),size(dd)
+    info = -1
+    return
+  end if
+
+  ee = x(1:size(dd))
+  call sv%z%cp_to(ac)
+  call sv%w%cp_to(ar)
+  ! Compute diag(W ee Z)
+  ! First  ee Z
+  call ac%scal(ee,info,side='L')
+  ! Then  diag(W (ee Z))
+  do i=1,ar%get_nrows()
+    ir  = ar%irp(i);  nzr = ar%irp(i+1)-ar%irp(i)
+    ic  = ac%icp(i);  nzc = ac%icp(i+1)-ac%icp(i)
+    ee(i) = psb_spdot_srtd(&
+         & nzr,ar%ja(ir:ir+nzr-1),ar%val(ir:ir+nzr-1),&
+         & nzc,ac%ia(ic:ic+nzc-1),ac%val(ic:ic+nzc-1))
+  end do
+  ! Now invert diagonal
+  dd = done/dd
+  dd = dd + ee
+  dd = done/dd
+  sv%d = dd
+  call sv%dv%bld(dd,mold=sv%dv%v)
+
+end subroutine amg_c_base_ainv_update_a

amgprec/impl/solver/amg_c_invk_solver_bld.f90

@@ -0,0 +1,93 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_invk_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+
+
+  use psb_base_mod
+  use psb_c_invk_fact_mod ! This module contains the construction routines
+
+  use amg_c_invk_solver, amg_protect_name => amg_c_invk_solver_bld
+
+  Implicit None
+
+  ! Arguments
+  type(psb_cspmat_type), intent(in), target            :: a
+  Type(psb_desc_type), Intent(inout)                  :: desc_a
+  class(amg_c_invk_solver_type), intent(inout)        :: sv
+  integer(psb_ipk_), intent(out)                      :: info
+  type(psb_cspmat_type), intent(in), target, optional :: b
+  class(psb_c_base_sparse_mat), intent(in), optional  :: amold
+  class(psb_c_base_vect_type), intent(in), optional   :: vmold
+  class(psb_i_base_vect_type), intent(in), optional   :: imold
+
+  ! Local variables
+  integer(psb_ipk_) :: n_row,n_col, nrow_a, nztota
+  complex(psb_spk_), pointer :: ww(:), aux(:), tx(:),ty(:)
+  integer(psb_ipk_) :: np,me,i, err_act, debug_unit, debug_level
+  type(psb_ctxt_type) :: ctxt
+  character(len=20) :: name='c_invk_solver_bld', ch_err
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+  debug_unit  = psb_get_debug_unit()
+  debug_level = psb_get_debug_level()
+  ctxt       = desc_a%get_context()
+  call psb_info(ctxt, me, np)
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) me,' ',trim(name),' start'
+
+
+  call psb_invk_fact(a,sv%fill_in,sv%inv_fill,&
+       & sv%w,sv%d,sv%z,desc_a,info,b)
+
+
+  if ((info == psb_success_) .and.present(amold)) then
+    call sv%w%cscnv(info,mold=amold)
+    if (info == psb_success_) &
+         & call sv%z%cscnv(info,mold=amold)
+  end if
+
+  if (info == psb_success_) then
+    call sv%dv%bld(sv%d,mold=vmold)
+  end if
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) me,' ',trim(name),' end'
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_invk_solver_bld

amgprec/impl/solver/amg_c_invk_solver_check.f90

@@ -0,0 +1,64 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_invk_solver_check(sv,info)
+
+
+  use psb_base_mod
+  use amg_c_invk_solver, amg_protect_name => amg_c_invk_solver_check
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_invk_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(out)               :: info
+  Integer(Psb_Ipk_) :: err_act
+  character(len=20) :: name='c_invk_solver_check'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+
+  call amg_check_def(sv%fill_in,&
+       & 'Level',izero,is_int_non_negative)
+  call amg_check_def(sv%inv_fill,&
+       & 'Level',izero,is_int_non_negative)
+
+  if (info /= psb_success_) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_invk_solver_check

amgprec/impl/solver/amg_c_invk_solver_clone.f90

@@ -0,0 +1,90 @@
+!  
+!
+!                             AMG4PSBLAS version 1.0
+!    MultiLevel Domain Decomposition Parallel Preconditioners Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.0)
+!
+!    (C) Copyright 2008,2009,2010,2010,2012
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!                        Alfredo Buttari      CNRS-IRIT, Toulouse
+!                        Pasqua D'Ambra       ICAR-CNR, Naples
+!                        Daniela di Serafino  Second University of Naples
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_invk_solver_clone(sv,svout,info)
+
+  use psb_base_mod
+  use amg_c_invk_solver, amg_protect_name => amg_c_invk_solver_clone
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_invk_solver_type), intent(inout)              :: sv
+  class(amg_c_base_solver_type), allocatable, intent(inout) :: svout
+  integer(psb_ipk_), intent(out)                            :: info
+  ! Local variables
+  integer(psb_ipk_) :: err_act
+
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+
+  if (allocated(svout)) then
+    call svout%free(info)
+    if (info == psb_success_) deallocate(svout, stat=info)
+  end if
+  if (info == psb_success_) &
+       & allocate(amg_c_invk_solver_type :: svout, stat=info)
+  if (info /= 0) then
+    info = psb_err_alloc_dealloc_
+    goto 9999
+  end if
+  select type(svo => svout)
+  type is (amg_c_invk_solver_type)
+    svo%fill_in  = sv%fill_in
+    svo%inv_fill = sv%inv_fill
+    call psb_safe_ab_cpy(sv%d,svo%d,info)
+    if (info == psb_success_) &
+         & call sv%dv%clone(svo%dv,info)
+    if (info == psb_success_) &
+         & call sv%w%clone(svo%w,info)
+    if (info == psb_success_) &
+         & call sv%z%clone(svo%z,info)
+
+  class default
+    info = psb_err_internal_error_
+  end select
+
+  if (info /= 0) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_invk_solver_clone

amgprec/impl/solver/amg_c_invk_solver_cseti.f90

@@ -0,0 +1,69 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_invk_solver_cseti(sv,what,val,info,idx)
+
+  use psb_base_mod
+  use amg_c_invk_solver, amg_protect_name => amg_c_invk_solver_cseti
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_invk_solver_type), intent(inout) :: sv
+  character(len=*), intent(in)                 :: what
+  integer(psb_ipk_), intent(in)                :: val
+  integer(psb_ipk_), intent(out)               :: info
+  integer(psb_ipk_), intent(in), optional      :: idx
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='d_invk_solver_cseti'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+  select case(psb_toupper(what))
+  case('SUB_FILLIN')
+    sv%fill_in   = val
+  case('INV_FILLIN')
+    sv%inv_fill  = val
+  case default
+    call sv%amg_c_base_solver_type%set(what,val,info)
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_invk_solver_cseti

amgprec/impl/solver/amg_c_invk_solver_descr.f90

@@ -0,0 +1,73 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_invk_solver_descr(sv,info,iout,coarse)
+
+
+  use psb_base_mod
+  use amg_c_invk_solver, amg_protect_name => amg_c_invk_solver_descr
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_invk_solver_type), intent(in) :: sv
+  integer(psb_ipk_), intent(out)            :: info
+  integer(psb_ipk_), intent(in), optional   :: iout
+  logical, intent(in), optional             :: coarse
+
+  ! Local variables
+  integer(psb_ipk_)  :: err_act
+  integer(psb_ipk_)  :: me, np
+  type(psb_ctxt_type) :: ctxt
+  character(len=20), parameter :: name='amg_c_invk_solver_descr'
+  integer(psb_ipk_) :: iout_
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+  if (present(iout)) then
+    iout_ = iout
+  else
+    iout_ = 6
+  endif
+
+  write(iout_,*) '  INVK Approximate Inverse with ILU(N) '
+  write(iout_,*) '  Fill level             :',sv%fill_in
+  write(iout_,*) '  Inverse fill level     :',sv%inv_fill
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_invk_solver_descr

amgprec/impl/solver/amg_c_invk_solver_seti.f90

@@ -0,0 +1,69 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_invk_solver_seti(sv,what,val,info)
+
+
+  use psb_base_mod
+  use amg_c_invk_solver, amg_protect_name => amg_c_invk_solver_seti
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_invk_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(in)                :: what
+  integer(psb_ipk_), intent(in)                :: val
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='d_invk_solver_seti'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+  select case(what)
+  case(amg_sub_fillin_)
+    sv%fill_in   = val
+  case(amg_inv_fillin_)
+    sv%inv_fill  = val
+  case default
+    ! call sv%amg_c_base_solver_type%set(what,val,info)
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_invk_solver_seti

amgprec/impl/solver/amg_c_invt_solver_bld.f90

@@ -0,0 +1,97 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_invt_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+
+  use psb_base_mod
+  use psb_c_invt_fact_mod ! This module contains the construction routines
+  use amg_c_invt_solver, amg_protect_name => amg_c_invt_solver_bld
+
+  Implicit None
+
+  ! Arguments
+  type(psb_cspmat_type), intent(in), target           :: a
+  Type(psb_desc_type), Intent(inout)                  :: desc_a
+  class(amg_c_invt_solver_type), intent(inout)        :: sv
+  integer(psb_ipk_), intent(out)                      :: info
+  type(psb_cspmat_type), intent(in), target, optional :: b
+  class(psb_c_base_sparse_mat), intent(in), optional  :: amold
+  class(psb_c_base_vect_type), intent(in), optional   :: vmold
+  class(psb_i_base_vect_type), intent(in), optional   :: imold
+
+  ! Local variables
+  integer(psb_ipk_) :: n_row,n_col, nrow_a, nztota
+  complex(psb_spk_), pointer :: ww(:), aux(:), tx(:),ty(:)
+  integer(psb_ipk_) :: np,me,i, err_act, debug_unit, debug_level
+  type(psb_ctxt_type) :: ctxt
+  character(len=20) :: name='amg_c_invt_solver_bld', ch_err
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+  debug_unit  = psb_get_debug_unit()
+  debug_level = psb_get_debug_level()
+  ctxt       = desc_a%get_context()
+  call psb_info(ctxt, me, np)
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) me,' ',trim(name),' start'
+
+
+  call psb_invt_fact(a,sv%fill_in,sv%inv_fill,&
+       & sv%thresh,sv%inv_thresh,&
+       & sv%w,sv%d,sv%z,desc_a,info,b)
+
+  if ((info == psb_success_) .and.present(amold)) then
+    call sv%w%cscnv(info,mold=amold)
+    if (info == psb_success_) &
+         & call sv%z%cscnv(info,mold=amold)
+  end if
+
+  if (info == psb_success_) then
+    call sv%dv%bld(sv%d,mold=vmold)
+  end if
+
+  if (info /= psb_success_) then
+    call psb_errpush(psb_err_internal_error_,name)
+    goto 9999
+  end if
+
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) me,' ',trim(name),' end'
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_invt_solver_bld

amgprec/impl/solver/amg_c_invt_solver_check.f90

@@ -0,0 +1,69 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_invt_solver_check(sv,info)
+
+
+  use psb_base_mod
+  use amg_c_invt_solver, amg_protect_name => amg_c_invt_solver_check
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_invt_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  Integer(Psb_Ipk_)  :: err_act
+  character(len=20) :: name='amg_c_invt_solver_check'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+
+  call amg_check_def(sv%fill_in,&
+       & 'Level',izero,is_int_non_negative)
+  call amg_check_def(sv%inv_fill,&
+       & 'Level',izero,is_int_non_negative)
+  call amg_check_def(sv%thresh,&
+       & 'Eps',szero,is_legal_s_fact_thrs)
+  call amg_check_def(sv%inv_thresh,&
+       & 'Eps',szero,is_legal_s_fact_thrs)
+
+  if (info /= psb_success_) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_invt_solver_check

amgprec/impl/solver/amg_c_invt_solver_clone.f90

@@ -0,0 +1,92 @@
+!  
+!
+!                             AMG4PSBLAS version 1.0
+!    MultiLevel Domain Decomposition Parallel Preconditioners Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.0)
+!
+!    (C) Copyright 2008,2009,2010,2010,2012
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!                        Alfredo Buttari      CNRS-IRIT, Toulouse
+!                        Pasqua D'Ambra       ICAR-CNR, Naples
+!                        Daniela di Serafino  Second University of Naples
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_invt_solver_clone(sv,svout,info)
+
+  use psb_base_mod
+  use amg_c_invt_solver, amg_protect_name => amg_c_invt_solver_clone
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_invt_solver_type), intent(inout)              :: sv
+  class(amg_c_base_solver_type), allocatable, intent(inout) :: svout
+  integer(psb_ipk_), intent(out)                            :: info
+  ! Local variables
+  integer(psb_ipk_) :: err_act
+
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+
+  if (allocated(svout)) then
+    call svout%free(info)
+    if (info == psb_success_) deallocate(svout, stat=info)
+  end if
+  if (info == psb_success_) &
+       & allocate(amg_c_invt_solver_type :: svout, stat=info)
+  if (info /= 0) then
+    info = psb_err_alloc_dealloc_
+    goto 9999
+  end if
+  select type(svo => svout)
+  type is (amg_c_invt_solver_type)
+    svo%fill_in    = sv%fill_in
+    svo%inv_fill   = sv%inv_fill
+    svo%thresh     = sv%thresh
+    svo%inv_thresh = sv%inv_thresh
+    call psb_safe_ab_cpy(sv%d,svo%d,info)
+    if (info == psb_success_) &
+         & call sv%dv%clone(svo%dv,info)
+    if (info == psb_success_) &
+         & call sv%w%clone(svo%w,info)
+    if (info == psb_success_) &
+         & call sv%z%clone(svo%z,info)
+
+  class default
+    info = psb_err_internal_error_
+  end select
+
+  if (info /= 0) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_invt_solver_clone

amgprec/impl/solver/amg_c_invt_solver_cseti.f90

@@ -0,0 +1,69 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_invt_solver_cseti(sv,what,val,info,idx)
+
+  use psb_base_mod
+  use amg_c_invt_solver, amg_protect_name => amg_c_invt_solver_cseti
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_invt_solver_type), intent(inout) :: sv
+  character(len=*), intent(in)                 :: what
+  integer(psb_ipk_), intent(in)                :: val
+  integer(psb_ipk_), intent(out)               :: info
+  integer(psb_ipk_), intent(in), optional      :: idx
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='amg_c_invt_solver_cseti'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+  select case(psb_toupper(what))
+  case('SUB_FILLIN')
+    sv%fill_in   = val
+  case('INV_FILLIN')
+    sv%inv_fill  = val
+  case default
+    call sv%amg_c_base_solver_type%set(what,val,info)
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_invt_solver_cseti

amgprec/impl/solver/amg_c_invt_solver_csetr.f90

@@ -0,0 +1,69 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_invt_solver_csetr(sv,what,val,info,idx)
+
+  use psb_base_mod
+  use amg_c_invt_solver, amg_protect_name => amg_c_invt_solver_csetr
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_invt_solver_type), intent(inout) :: sv
+  character(len=*), intent(in)                 :: what
+  real(psb_spk_), intent(in)                   :: val
+  integer(psb_ipk_), intent(out)               :: info
+  integer(psb_ipk_), intent(in), optional      :: idx
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='amg_c_invt_solver_csetr'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+
+  select case(psb_toupper(what))
+  case('SUB_ILUTHRS')
+    sv%thresh = val
+  case('INV_THRESH')
+    sv%inv_thresh = val
+  case default
+    call sv%amg_c_base_solver_type%set(what,val,info)
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_invt_solver_csetr

amgprec/impl/solver/amg_c_invt_solver_descr.f90

@@ -0,0 +1,74 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_invt_solver_descr(sv,info,iout,coarse)
+
+
+  use psb_base_mod
+  use amg_c_invt_solver, amg_protect_name => amg_c_invt_solver_descr
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_invt_solver_type), intent(in) :: sv
+  integer(psb_ipk_), intent(out)            :: info
+  integer(psb_ipk_), intent(in), optional   :: iout
+  logical, intent(in), optional             :: coarse
+
+  ! Local variables
+  integer(psb_ipk_) :: err_act
+  integer(psb_ipk_) :: ictxt, me, np
+  character(len=20), parameter :: name='amg_c_invt_solver_descr'
+  integer(psb_ipk_) :: iout_
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+  if (present(iout)) then
+    iout_ = iout
+  else
+    iout_ = 6
+  endif
+
+  write(iout_,*) '  INVT Approximate Inverse with ILU(T,P) '
+  write(iout_,*) '  Fill level             :',sv%fill_in
+  write(iout_,*) '  Fill threshold         :',sv%thresh
+  write(iout_,*) '  Inverse fill level     :',sv%inv_fill
+  write(iout_,*) '  Inverse fill threshold :',sv%inv_thresh
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_invt_solver_descr

amgprec/impl/solver/amg_c_invt_solver_seti.f90

@@ -0,0 +1,70 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_invt_solver_seti(sv,what,val,info)
+
+
+  use psb_base_mod
+  use amg_c_invt_solver, amg_protect_name => amg_c_invt_solver_seti
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_invt_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(in)                :: what
+  integer(psb_ipk_), intent(in)                :: val
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  Integer(Psb_Ipk_) :: err_act
+  character(len=20) :: name='amg_c_invt_solver_seti'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+  select case(what)
+  case(amg_sub_fillin_)
+    sv%fill_in   = val
+  case(amg_inv_fillin_)
+    sv%inv_fill  = val
+  case default
+!!$      write(0,*) name,': Error: invalid WHAT'
+!!$      info = -2
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_invt_solver_seti

amgprec/impl/solver/amg_c_invt_solver_setr.f90

@@ -0,0 +1,69 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_c_invt_solver_setr(sv,what,val,info)
+
+
+  use psb_base_mod
+  use amg_c_invt_solver, amg_protect_name => amg_c_invt_solver_setr
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_invt_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(in)                :: what
+  real(psb_spk_), intent(in)                   :: val
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  Integer(Psb_Ipk_) :: err_act
+  character(len=20) :: name='amg_c_invt_solver_setr'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+
+  select case(what)
+  case(amg_sub_iluthrs_)
+    sv%thresh = val
+  case(amg_inv_thresh_)
+    sv%inv_thresh = val
+  case default
+    ! call sv%amg_c_base_solver_type%set(what,val,info)
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_c_invt_solver_setr

amgprec/impl/solver/amg_d_ainv_solver_bld.f90

@@ -0,0 +1,98 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_ainv_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+
+
+  use psb_base_mod
+  use psb_d_ainv_fact_mod
+  use amg_d_ainv_solver, amg_protect_name => amg_d_ainv_solver_bld
+
+  Implicit None
+
+  ! Arguments
+  type(psb_dspmat_type), intent(in), target    :: a
+  Type(psb_desc_type), Intent(inout)           :: desc_a
+  class(amg_d_ainv_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(out)                      :: info
+  type(psb_dspmat_type), intent(in), target, optional :: b
+  class(psb_d_base_sparse_mat), intent(in), optional  :: amold
+  class(psb_d_base_vect_type), intent(in), optional   :: vmold
+  class(psb_i_base_vect_type), intent(in), optional   :: imold
+  ! Local variables
+  integer(psb_ipk_)  :: n_row,n_col, nrow_a, nztota
+  real(psb_dpk_), pointer :: ww(:), aux(:), tx(:),ty(:)
+  integer(psb_ipk_)  :: np,me,i, err_act, debug_unit, debug_level
+  type(psb_ctxt_type) :: ctxt
+  character(len=20)  :: name='amg_d_ainv_solver_bld', ch_err
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+  debug_unit  = psb_get_debug_unit()
+  debug_level = psb_get_debug_level()
+  ctxt       = desc_a%get_context()
+  call psb_info(ctxt, me, np)
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) me,' ',trim(name),' start'
+
+  call psb_d_ainv_bld(a,sv%alg,sv%fill_in,sv%thresh,&
+       & sv%w,sv%d,sv%z,desc_a,info,b,iscale=amg_ilu_scale_maxval_)
+
+  if ((info == psb_success_) .and.present(amold)) then
+    call sv%w%set_asb()
+    call sv%w%trim()
+    call sv%z%set_asb()
+    call sv%z%trim()
+    call sv%w%cscnv(info,mold=amold)
+    if (info == psb_success_) &
+         & call sv%z%cscnv(info,mold=amold)
+  end if
+
+  if (info == psb_success_) &
+       & call sv%dv%bld(sv%d,mold=vmold)
+
+  if (info /= psb_success_) then
+    call psb_errpush(psb_err_internal_error_,name)
+    goto 9999
+  end if
+
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) me,' ',trim(name),' end'
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_ainv_solver_bld

amgprec/impl/solver/amg_d_ainv_solver_check.f90

@@ -0,0 +1,65 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_ainv_solver_check(sv,info)
+
+
+  use psb_base_mod
+  use amg_d_ainv_solver, amg_protect_name => amg_d_ainv_solver_check
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_ainv_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='amg_d_ainv_solver_check'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+
+  call amg_check_def(sv%fill_in,&
+       & 'Nzmin',ione,is_positive_nz_min)
+  call amg_check_def(sv%thresh,&
+       & 'Eps',dzero,is_legal_d_fact_thrs)
+
+  if (info /= psb_success_) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_ainv_solver_check

amgprec/impl/solver/amg_d_ainv_solver_clone.f90

@@ -0,0 +1,91 @@
+!
+!
+!                             AMG4PSBLAS version 1.0
+!    MultiLevel Domain Decomposition Parallel Preconditioners Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.0)
+!
+!    (C) Copyright 2008,2009,2010,2010,2012
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!                        Alfredo Buttari      CNRS-IRIT, Toulouse
+!                        Pasqua D'Ambra       ICAR-CNR, Naples
+!                        Daniela di Serafino  Second University of Naples
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_ainv_solver_clone(sv,svout,info)
+
+  use psb_base_mod
+  use amg_d_ainv_solver, amg_protect_name => amg_d_ainv_solver_clone
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_ainv_solver_type), intent(inout)              :: sv
+  class(amg_d_base_solver_type), allocatable, intent(inout) :: svout
+  integer(psb_ipk_), intent(out)                            :: info
+  ! Local variables
+  integer(psb_ipk_) :: err_act
+
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+
+  if (allocated(svout)) then
+    call svout%free(info)
+    if (info == psb_success_) deallocate(svout, stat=info)
+  end if
+  if (info == psb_success_) &
+       & allocate(amg_d_ainv_solver_type :: svout, stat=info)
+  if (info /= 0) then
+    info = psb_err_alloc_dealloc_
+    goto 9999
+  end if
+  select type(svo => svout)
+  type is (amg_d_ainv_solver_type)
+    svo%alg      = sv%alg
+    svo%fill_in  = sv%fill_in
+    svo%thresh   = sv%thresh
+    call psb_safe_ab_cpy(sv%d,svo%d,info)
+    if (info == psb_success_) &
+         & call sv%dv%clone(svo%dv,info)
+    if (info == psb_success_) &
+         & call sv%w%clone(svo%w,info)
+    if (info == psb_success_) &
+         & call sv%z%clone(svo%z,info)
+
+  class default
+    info = psb_err_internal_error_
+  end select
+
+  if (info /= 0) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_ainv_solver_clone

amgprec/impl/solver/amg_d_ainv_solver_csetc.f90

@@ -0,0 +1,79 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_ainv_solver_csetc(sv,what,val,info,idx)
+
+
+  use psb_base_mod
+  use amg_d_ainv_solver, amg_protect_name => amg_d_ainv_solver_csetc
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_ainv_solver_type), intent(inout) :: sv
+  character(len=*), intent(in)                 :: what
+  character(len=*), intent(in)                 :: val
+  integer(psb_ipk_), intent(out)               :: info
+  integer(psb_ipk_), intent(in), optional      :: idx
+  !
+  integer(psb_ipk_ ) :: err_act, ival
+  character(len=20)  :: name='amg_d_ainv_solver_setc'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+!!$  select case(psb_toupper(trim(what)))
+!!$  case('AINV_ALG')
+!!$    sv%alg  = sv%stringval(val)
+!!$  case default
+!!$    call sv%mld_d_base_solver_type%set(what,val,info)
+!!$  end select
+  ival =  sv%stringval(val)
+
+  if (ival >=0) then
+    call sv%set(what,ival,info)
+  end if
+
+  if (info /= psb_success_) then
+    info = psb_err_from_subroutine_
+    call psb_errpush(info, name)
+    goto 9999
+  end if
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_ainv_solver_csetc

amgprec/impl/solver/amg_d_ainv_solver_cseti.f90

@@ -0,0 +1,69 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_ainv_solver_cseti(sv,what,val,info,idx)
+
+  use psb_base_mod
+  use amg_d_ainv_solver, amg_protect_name => amg_d_ainv_solver_cseti
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_ainv_solver_type), intent(inout) :: sv
+  character(len=*), intent(in)                 :: what
+  integer(psb_ipk_), intent(in)                :: val
+  integer(psb_ipk_), intent(out)               :: info
+  integer(psb_ipk_), intent(in), optional      :: idx
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='amg_d_ainv_solver_cseti'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+  select case(psb_toupper(trim(what)))
+  case('SUB_FILLIN')
+    sv%fill_in  = val
+  case('AINV_ALG')
+    sv%alg      = val
+  case default
+    call sv%amg_d_base_solver_type%set(what,val,info)
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_ainv_solver_cseti

amgprec/impl/solver/amg_d_ainv_solver_csetr.f90

@@ -0,0 +1,67 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_ainv_solver_csetr(sv,what,val,info,idx)
+
+  use psb_base_mod
+  use amg_d_ainv_solver, amg_protect_name => amg_d_ainv_solver_csetr
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_ainv_solver_type), intent(inout) :: sv
+  character(len=*), intent(in)                 :: what
+  real(psb_dpk_), intent(in)                   :: val
+  integer(psb_ipk_), intent(out)               :: info
+  integer(psb_ipk_), intent(in), optional      :: idx
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='amg_d_ainv_solver_csetr'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+
+  select case(psb_toupper(what))
+  case('SUB_ILUTHRS')
+    sv%thresh = val
+  case default
+    call sv%amg_d_base_solver_type%set(what,val,info)
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_ainv_solver_csetr

amgprec/impl/solver/amg_d_ainv_solver_descr.f90

@@ -0,0 +1,73 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_ainv_solver_descr(sv,info,iout,coarse)
+
+
+  use psb_base_mod
+  use amg_d_ainv_solver, amg_protect_name => amg_d_ainv_solver_descr
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_ainv_solver_type), intent(in) :: sv
+  integer(psb_ipk_), intent(out)            :: info
+  integer(psb_ipk_), intent(in), optional   :: iout
+  logical, intent(in), optional             :: coarse
+
+  ! Local variables
+  integer(psb_ipk_)      :: err_act
+  integer(psb_ipk_)      :: ictxt, me, np
+  character(len=20), parameter :: name='amg_d_ainv_solver_descr'
+  integer(psb_ipk_)      :: iout_
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+  if (present(iout)) then
+    iout_ = iout
+  else
+    iout_ = 6
+  endif
+
+  write(iout_,*) '  AINV: Approximate Inverse with sparse biconjugation '
+  write(iout_,*) '  Algorithm variant      : ',sv%algname(sv%alg)
+  write(iout_,*) '  Fill level             : ',sv%fill_in
+  write(iout_,*) '  Fill threshold         : ',sv%thresh
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_ainv_solver_descr

amgprec/impl/solver/amg_d_ainv_solver_setc.f90

@@ -0,0 +1,71 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_ainv_solver_setc(sv,what,val,info)
+
+
+  use psb_base_mod
+  use amg_d_ainv_solver, amg_protect_name => amg_d_ainv_solver_setc
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_ainv_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(in)                :: what
+  character(len=*), intent(in)                 :: val
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  integer(psb_ipk_)  :: err_act, ival
+  character(len=20)  :: name='amg_d_ainv_solver_setc'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+  ival =  sv%stringval(val)
+  if (ival >=0) then
+    call sv%set(what,ival,info)
+  end if
+
+  if (info /= psb_success_) then
+    info = psb_err_from_subroutine_
+    call psb_errpush(info, name)
+    goto 9999
+  end if
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_ainv_solver_setc

amgprec/impl/solver/amg_d_ainv_solver_seti.f90

@@ -0,0 +1,70 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_ainv_solver_seti(sv,what,val,info)
+
+
+  use psb_base_mod
+  use amg_d_ainv_solver, amg_protect_name => amg_d_ainv_solver_seti
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_ainv_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(in)                :: what
+  integer(psb_ipk_), intent(in)                :: val
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  integer(psb_ipk_)  :: err_act
+  character(len=20)  :: name='amg_d_ainv_solver_seti'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+  select case(what)
+  case(amg_sub_fillin_)
+    sv%fill_in  = val
+  case(amg_ainv_alg_)
+    sv%alg      = val
+  case default
+!!$      write(0,*) name,': Error: invalid WHAT'
+!!$      info = -2
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_ainv_solver_seti

amgprec/impl/solver/amg_d_ainv_solver_setr.f90

@@ -0,0 +1,69 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_ainv_solver_setr(sv,what,val,info)
+
+
+  use psb_base_mod
+  use amg_d_ainv_solver, amg_protect_name => amg_d_ainv_solver_setr
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_ainv_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(in)                :: what
+  real(psb_dpk_), intent(in)                   :: val
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  integer(psb_ipk_)  :: err_act
+  character(len=20)  :: name='amg_d_ainv_solver_setr'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+
+  select case(what)
+  case(amg_sub_iluthrs_)
+    sv%thresh = val
+  case default
+!!$      write(0,*) name,': Error: invalid WHAT'
+!!$      info = -2
+!!$      goto 9999
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_ainv_solver_setr

amgprec/impl/solver/amg_d_base_ainv_solver_apply.f90

@@ -0,0 +1,153 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_base_ainv_solver_apply(alpha,sv,x,beta,y,desc_data,&
+     & trans,work,info,init,initu)
+
+  use psb_base_mod
+  use amg_d_base_ainv_mod, amg_protect_name => amg_d_base_ainv_solver_apply
+  implicit none
+  type(psb_desc_type), intent(in)        :: desc_data
+  class(amg_d_base_ainv_solver_type), intent(inout) :: sv
+  real(psb_dpk_),intent(inout)           :: x(:)
+  real(psb_dpk_),intent(inout)           :: y(:)
+  real(psb_dpk_),intent(in)              :: alpha,beta
+  character(len=1),intent(in)            :: trans
+  real(psb_dpk_),target, intent(inout)   :: work(:)
+  integer(psb_ipk_), intent(out)         :: info
+  character, intent(in), optional        :: init
+  real(psb_dpk_),intent(inout), optional :: initu(:)
+  !
+  integer(psb_ipk_)  :: n_row,n_col
+  real(psb_dpk_), pointer :: ww(:), aux(:), tx(:),ty(:)
+  integer(psb_ipk_)  :: np,me,i, err_act
+  type(psb_ctxt_type)   :: ctxt
+  character          :: trans_
+  character(len=20)  :: name='d_base_ainv_solver_apply'
+
+  call psb_erractionsave(err_act)
+
+  info = psb_success_
+
+  trans_ = psb_toupper(trans)
+  select case(trans_)
+  case('N')
+  case('T','C')
+  case default
+    call psb_errpush(psb_err_iarg_invalid_i_,name)
+    goto 9999
+  end select
+  !
+  ! For non-iterative solvers, init and initu are ignored.
+  !
+
+  n_row = psb_cd_get_local_rows(desc_data)
+  n_col = psb_cd_get_local_cols(desc_data)
+
+  if (n_col <= size(work)) then
+    ww => work(1:n_col)
+    if ((4*n_col+n_col) <= size(work)) then
+      aux => work(n_col+1:)
+    else
+      allocate(aux(4*n_col),stat=info)
+      if (info /= psb_success_) then
+        info=psb_err_alloc_request_
+        call psb_errpush(info,name,i_err=(/4*n_col/),&
+             & a_err='real(psb_dpk_)')
+        goto 9999
+      end if
+    endif
+  else
+    allocate(ww(n_col),aux(4*n_col),stat=info)
+    if (info /= psb_success_) then
+      info=psb_err_alloc_request_
+      call psb_errpush(info,name,i_err=(/5*n_col/),&
+           & a_err='real(psb_dpk_)')
+      goto 9999
+    end if
+  endif
+
+  select case(trans_)
+  case('N')
+    call psb_spmm(done,sv%w,x,dzero,ww,desc_data,info,&
+         & trans=trans_,work=aux,doswap=.false.)
+    ww(1:n_row) = ww(1:n_row) * sv%d(1:n_row)
+    if (info == psb_success_) &
+         & call psb_spmm(alpha,sv%z,ww,beta,y,desc_data,info,&
+         & trans=trans_,work=aux,doswap=.false.)
+
+  case('T','C')
+    call psb_spmm(done,sv%z,x,dzero,ww,desc_data,info,&
+         & trans=trans_,work=aux,doswap=.false.)
+    ww(1:n_row) = ww(1:n_row) * sv%d(1:n_row)
+    if (info == psb_success_) &
+         & call psb_spmm(alpha,sv%w,ww,beta,y,desc_data,info,&
+         & trans=trans_,work=aux,doswap=.false.)
+
+  case default
+    call psb_errpush(psb_err_internal_error_,name,&
+         & a_err='Invalid TRANS in ainv subsolve')
+    goto 9999
+  end select
+
+
+  if (info /= psb_success_) then
+
+    call psb_errpush(psb_err_internal_error_,name,&
+         & a_err='Error in subsolve')
+    goto 9999
+  endif
+
+  if (n_col <= size(work)) then
+    if ((4*n_col+n_col) <= size(work)) then
+    else
+      deallocate(aux,stat=info)
+    endif
+  else
+    deallocate(ww,aux,stat=info)
+  endif
+
+  if (info /= psb_success_) then
+
+    call psb_errpush(psb_err_internal_error_,name,&
+         & a_err='Deallocate')
+    goto 9999
+  endif
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_base_ainv_solver_apply

amgprec/impl/solver/amg_d_base_ainv_solver_apply_vect.f90

@@ -0,0 +1,167 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_base_ainv_solver_apply_vect(alpha,sv,x,beta,y,desc_data,&
+     & trans,work,wv,info,init,initu)
+
+  use psb_base_mod
+  use amg_d_base_ainv_mod, amg_protect_name => amg_d_base_ainv_solver_apply_vect
+  implicit none
+  type(psb_desc_type), intent(in)               :: desc_data
+  class(amg_d_base_ainv_solver_type), intent(inout) :: sv
+  type(psb_d_vect_type), intent(inout)          :: x
+  type(psb_d_vect_type), intent(inout)          :: y
+  real(psb_dpk_), intent(in)                    :: alpha,beta
+  character(len=1), intent(in)                  :: trans
+  real(psb_dpk_),target, intent(inout)          :: work(:)
+  type(psb_d_vect_type),intent(inout)           :: wv(:)
+  integer(psb_ipk_), intent(out)                :: info
+  character, intent(in), optional               :: init
+  type(psb_d_vect_type),intent(inout), optional :: initu
+  !
+  integer(psb_ipk_)     :: n_row,n_col
+  real(psb_dpk_), pointer :: ww(:), aux(:)
+  type(psb_d_vect_type) :: tx,ty
+  integer(psb_ipk_)     :: np,me,i, err_act
+  type(psb_ctxt_type)   :: ctxt
+  character             :: trans_
+  character(len=20)     :: name='d_base_ainv_solver_apply'
+
+  call psb_erractionsave(err_act)
+
+  info = psb_success_
+
+  trans_ = psb_toupper(trans)
+  select case(trans_)
+  case('N')
+  case('T','C')
+  case default
+    call psb_errpush(psb_err_iarg_invalid_i_,name)
+    goto 9999
+  end select
+  !
+  ! For non-iterative solvers, init and initu are ignored.
+  !
+
+  n_row = psb_cd_get_local_rows(desc_data)
+  n_col = psb_cd_get_local_cols(desc_data)
+
+  if (n_col <= size(work)) then
+    ww => work(1:n_col)
+    if ((4*n_col+n_col) <= size(work)) then
+      aux => work(n_col+1:)
+    else
+      allocate(aux(4*n_col),stat=info)
+      if (info /= psb_success_) then
+        info=psb_err_alloc_request_
+        call psb_errpush(info,name,i_err=(/4*n_col/),&
+             & a_err='real(psb_dpk_)')
+        goto 9999
+      end if
+    endif
+  else
+    allocate(ww(n_col),aux(4*n_col),stat=info)
+    if (info /= psb_success_) then
+      info=psb_err_alloc_request_
+      call psb_errpush(info,name,i_err=(/5*n_col/),&
+           & a_err='real(psb_dpk_)')
+      goto 9999
+    end if
+  endif
+
+  if (size(wv) < 2) then
+    info = psb_err_internal_error_
+    call psb_errpush(info,name,&
+         & a_err='invalid wv size')
+    goto 9999
+  end if
+
+
+  associate(tx => wv(1), ty => wv(2))
+
+    select case(trans_)
+    case('N')
+      call psb_spmm(done,sv%w,x,dzero,tx,desc_data,info,&
+           & trans=trans_,work=aux,doswap=.false.)
+      if (info == psb_success_) call ty%mlt(done,sv%dv,tx,dzero,info)
+      if (info == psb_success_) &
+           & call psb_spmm(alpha,sv%z,ty,beta,y,desc_data,info,&
+           & trans=trans_,work=aux,doswap=.false.)
+
+    case('T','C')
+      call psb_spmm(done,sv%z,x,dzero,tx,desc_data,info,&
+           & trans=trans_,work=aux,doswap=.false.)
+      if (info == psb_success_) call ty%mlt(done,sv%dv,tx,dzero,info)
+      if (info == psb_success_) &
+           & call psb_spmm(alpha,sv%w,ty,beta,y,desc_data,info,&
+           & trans=trans_,work=aux,doswap=.false.)
+
+    case default
+      call psb_errpush(psb_err_internal_error_,name,&
+           & a_err='Invalid TRANS in ainv subsolve')
+      goto 9999
+    end select
+
+
+    if (info /= psb_success_) then
+
+      call psb_errpush(psb_err_internal_error_,name,&
+           & a_err='Error in subsolve')
+      goto 9999
+    endif
+
+  end associate
+
+  if (n_col <= size(work)) then
+    if ((4*n_col+n_col) <= size(work)) then
+    else
+      deallocate(aux,stat=info)
+    endif
+  else
+    deallocate(ww,aux,stat=info)
+  endif
+
+  if (info /= psb_success_) then
+
+    call psb_errpush(psb_err_internal_error_,name,&
+         & a_err='Deallocate')
+    goto 9999
+  endif
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_base_ainv_solver_apply_vect

amgprec/impl/solver/amg_d_base_ainv_solver_cnv.f90

@@ -0,0 +1,63 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_base_ainv_solver_cnv(sv,info,amold,vmold,imold)
+  use psb_base_mod
+  use amg_d_base_ainv_mod, amg_protect_name => amg_d_base_ainv_solver_cnv
+  Implicit None
+  ! Arguments
+  class(amg_d_base_ainv_solver_type), intent(inout)  :: sv
+  integer(psb_ipk_), intent(out)                     :: info
+  class(psb_d_base_sparse_mat), intent(in), optional :: amold
+  class(psb_d_base_vect_type), intent(in), optional  :: vmold
+  class(psb_i_base_vect_type), intent(in), optional  :: imold
+
+  !local
+  integer(psb_ipk_)  :: i, j, il1, iln, lname, lev
+  integer(psb_ipk_)  :: iam, np
+  type(psb_ctxt_type)   :: ctxt
+  character(len=80)  :: prefix_
+  character(len=120) :: fname ! len should be at least 20 more than
+  logical :: solver_
+  !  len of prefix_
+
+  info = 0
+
+  if (present(amold)) then
+    call sv%w%cscnv(info,mold=amold)
+    call sv%z%cscnv(info,mold=amold)
+  end if
+  call sv%dv%cnv(mold=vmold)
+
+end subroutine amg_d_base_ainv_solver_cnv

amgprec/impl/solver/amg_d_base_ainv_solver_dmp.f90

@@ -0,0 +1,93 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_base_ainv_solver_dmp(sv,desc,level,info,prefix,head,solver,global_num)
+
+  use psb_base_mod
+  use amg_d_base_ainv_mod, amg_protect_name => amg_d_base_ainv_solver_dmp
+  implicit none
+  class(amg_d_base_ainv_solver_type), intent(in) :: sv
+  type(psb_desc_type), intent(in)             :: desc
+  integer(psb_ipk_), intent(in)              :: level
+  integer(psb_ipk_), intent(out)             :: info
+  character(len=*), intent(in), optional     :: prefix, head
+  logical, optional, intent(in)              :: solver, global_num
+  !
+  integer(psb_ipk_)  :: i, j, il1, iln, lname, lev
+  integer(psb_ipk_)  :: iam, np
+  type(psb_ctxt_type)   :: ctxt
+  character(len=80)  :: prefix_
+  character(len=120) :: fname ! len should be at least 20 more than
+  logical :: solver_, global_num_
+  !  len of prefix_
+
+  info = 0
+
+  if (present(prefix)) then
+    prefix_ = trim(prefix(1:min(len(prefix),len(prefix_))))
+  else
+    prefix_ = "dump_ainv_d"
+  end if
+
+  ctxt = desc%get_context()
+  call psb_info(ctxt,iam,np)
+
+  if (present(solver)) then
+    solver_ = solver
+  else
+    solver_ = .false.
+  end if
+  if (present(global_num)) then
+    global_num_ = global_num
+  else
+    global_num_ = .false.
+  end if
+  lname = len_trim(prefix_)
+  fname = trim(prefix_)
+  write(fname(lname+1:lname+5),'(a,i3.3)') '_p',iam
+  lname = lname + 5
+
+  if (solver_) then
+    write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_wmat.mtx'
+    if (sv%w%is_asb()) &
+         & call sv%w%print(fname,head=head)
+    write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_diag.mtx'
+    if (allocated(sv%d)) &
+         & call psb_geprt(fname,sv%d,head=head)
+    write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_zmat.mtx'
+    if (sv%z%is_asb()) &
+         & call sv%z%print(fname,head=head)
+  end if
+
+end subroutine amg_d_base_ainv_solver_dmp

amgprec/impl/solver/amg_d_base_ainv_solver_free.f90

@@ -0,0 +1,70 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_base_ainv_solver_free(sv,info)
+
+  use psb_base_mod
+  use amg_d_base_ainv_mod, amg_protect_name => amg_d_base_ainv_solver_free
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_base_ainv_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(out)                    :: info
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='amg_d_base_ainv_solver_free'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+  call sv%clear_data(info)
+
+  if (allocated(sv%d)) then
+    deallocate(sv%d,stat=info)
+    if (info /= psb_success_) then
+      info = psb_err_alloc_dealloc_
+      call psb_errpush(info,name)
+      goto 9999
+    end if
+  end if
+  call sv%w%free()
+  call sv%z%free()
+  call sv%dv%free(info)
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_base_ainv_solver_free

amgprec/impl/solver/amg_d_base_ainv_update_a.f90

@@ -0,0 +1,81 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_base_ainv_update_a(sv,x,desc_data,info)
+  use amg_d_base_ainv_mod, amg_protect_name => amg_d_base_ainv_update_a
+  use psb_base_mod
+
+  implicit none
+
+  type(psb_desc_type), intent(in)            :: desc_data
+  class(amg_d_base_ainv_solver_type), intent(inout) :: sv
+  real(psb_dpk_),intent(in)                  :: x(:)
+  integer(psb_ipk_), intent(out)             :: info
+
+  ! Local variables
+  real(psb_dpk_), allocatable   :: dd(:), ee(:)
+  integer(psb_ipk_) :: nrows, ncols, i, j, k, nzr, nzc, ir, ic
+
+  type(psb_d_csc_sparse_mat) :: ac
+  type(psb_d_csr_sparse_mat) :: ar
+
+  dd = sv%dv%get_vect()
+  if (size(x)<size(dd)) then
+    write(0,*) 'Wrong size in update',size(x),size(dd)
+    info = -1
+    return
+  end if
+
+  ee = x(1:size(dd))
+  call sv%z%cp_to(ac)
+  call sv%w%cp_to(ar)
+  ! Compute diag(W ee Z)
+  ! First  ee Z
+  call ac%scal(ee,info,side='L')
+  ! Then  diag(W (ee Z))
+  do i=1,ar%get_nrows()
+    ir  = ar%irp(i);  nzr = ar%irp(i+1)-ar%irp(i)
+    ic  = ac%icp(i);  nzc = ac%icp(i+1)-ac%icp(i)
+    ee(i) = psb_spdot_srtd(&
+         & nzr,ar%ja(ir:ir+nzr-1),ar%val(ir:ir+nzr-1),&
+         & nzc,ac%ia(ic:ic+nzc-1),ac%val(ic:ic+nzc-1))
+  end do
+  ! Now invert diagonal
+  dd = done/dd
+  dd = dd + ee
+  dd = done/dd
+  sv%d = dd
+  call sv%dv%bld(dd,mold=sv%dv%v)
+
+end subroutine amg_d_base_ainv_update_a

amgprec/impl/solver/amg_d_invk_solver_bld.f90

@@ -0,0 +1,93 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_invk_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+
+
+  use psb_base_mod
+  use psb_d_invk_fact_mod ! This module contains the construction routines
+
+  use amg_d_invk_solver, amg_protect_name => amg_d_invk_solver_bld
+
+  Implicit None
+
+  ! Arguments
+  type(psb_dspmat_type), intent(in), target            :: a
+  Type(psb_desc_type), Intent(inout)                  :: desc_a
+  class(amg_d_invk_solver_type), intent(inout)        :: sv
+  integer(psb_ipk_), intent(out)                      :: info
+  type(psb_dspmat_type), intent(in), target, optional :: b
+  class(psb_d_base_sparse_mat), intent(in), optional  :: amold
+  class(psb_d_base_vect_type), intent(in), optional   :: vmold
+  class(psb_i_base_vect_type), intent(in), optional   :: imold
+
+  ! Local variables
+  integer(psb_ipk_) :: n_row,n_col, nrow_a, nztota
+  real(psb_dpk_), pointer :: ww(:), aux(:), tx(:),ty(:)
+  integer(psb_ipk_) :: np,me,i, err_act, debug_unit, debug_level
+  type(psb_ctxt_type) :: ctxt
+  character(len=20) :: name='d_invk_solver_bld', ch_err
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+  debug_unit  = psb_get_debug_unit()
+  debug_level = psb_get_debug_level()
+  ctxt       = desc_a%get_context()
+  call psb_info(ctxt, me, np)
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) me,' ',trim(name),' start'
+
+
+  call psb_invk_fact(a,sv%fill_in,sv%inv_fill,&
+       & sv%w,sv%d,sv%z,desc_a,info,b)
+
+
+  if ((info == psb_success_) .and.present(amold)) then
+    call sv%w%cscnv(info,mold=amold)
+    if (info == psb_success_) &
+         & call sv%z%cscnv(info,mold=amold)
+  end if
+
+  if (info == psb_success_) then
+    call sv%dv%bld(sv%d,mold=vmold)
+  end if
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) me,' ',trim(name),' end'
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_invk_solver_bld

amgprec/impl/solver/amg_d_invk_solver_check.f90

@@ -0,0 +1,64 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_invk_solver_check(sv,info)
+
+
+  use psb_base_mod
+  use amg_d_invk_solver, amg_protect_name => amg_d_invk_solver_check
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_invk_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(out)               :: info
+  Integer(Psb_Ipk_) :: err_act
+  character(len=20) :: name='d_invk_solver_check'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+
+  call amg_check_def(sv%fill_in,&
+       & 'Level',izero,is_int_non_negative)
+  call amg_check_def(sv%inv_fill,&
+       & 'Level',izero,is_int_non_negative)
+
+  if (info /= psb_success_) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_invk_solver_check

amgprec/impl/solver/amg_d_invk_solver_clone.f90

@@ -0,0 +1,90 @@
+!  
+!
+!                             AMG4PSBLAS version 1.0
+!    MultiLevel Domain Decomposition Parallel Preconditioners Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.0)
+!
+!    (C) Copyright 2008,2009,2010,2010,2012
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!                        Alfredo Buttari      CNRS-IRIT, Toulouse
+!                        Pasqua D'Ambra       ICAR-CNR, Naples
+!                        Daniela di Serafino  Second University of Naples
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_invk_solver_clone(sv,svout,info)
+
+  use psb_base_mod
+  use amg_d_invk_solver, amg_protect_name => amg_d_invk_solver_clone
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_invk_solver_type), intent(inout)              :: sv
+  class(amg_d_base_solver_type), allocatable, intent(inout) :: svout
+  integer(psb_ipk_), intent(out)                            :: info
+  ! Local variables
+  integer(psb_ipk_) :: err_act
+
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+
+  if (allocated(svout)) then
+    call svout%free(info)
+    if (info == psb_success_) deallocate(svout, stat=info)
+  end if
+  if (info == psb_success_) &
+       & allocate(amg_d_invk_solver_type :: svout, stat=info)
+  if (info /= 0) then
+    info = psb_err_alloc_dealloc_
+    goto 9999
+  end if
+  select type(svo => svout)
+  type is (amg_d_invk_solver_type)
+    svo%fill_in  = sv%fill_in
+    svo%inv_fill = sv%inv_fill
+    call psb_safe_ab_cpy(sv%d,svo%d,info)
+    if (info == psb_success_) &
+         & call sv%dv%clone(svo%dv,info)
+    if (info == psb_success_) &
+         & call sv%w%clone(svo%w,info)
+    if (info == psb_success_) &
+         & call sv%z%clone(svo%z,info)
+
+  class default
+    info = psb_err_internal_error_
+  end select
+
+  if (info /= 0) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_invk_solver_clone

amgprec/impl/solver/amg_d_invk_solver_cseti.f90

@@ -0,0 +1,69 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_invk_solver_cseti(sv,what,val,info,idx)
+
+  use psb_base_mod
+  use amg_d_invk_solver, amg_protect_name => amg_d_invk_solver_cseti
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_invk_solver_type), intent(inout) :: sv
+  character(len=*), intent(in)                 :: what
+  integer(psb_ipk_), intent(in)                :: val
+  integer(psb_ipk_), intent(out)               :: info
+  integer(psb_ipk_), intent(in), optional      :: idx
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='d_invk_solver_cseti'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+  select case(psb_toupper(what))
+  case('SUB_FILLIN')
+    sv%fill_in   = val
+  case('INV_FILLIN')
+    sv%inv_fill  = val
+  case default
+    call sv%amg_d_base_solver_type%set(what,val,info)
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_invk_solver_cseti

amgprec/impl/solver/amg_d_invk_solver_descr.f90

@@ -0,0 +1,73 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_invk_solver_descr(sv,info,iout,coarse)
+
+
+  use psb_base_mod
+  use amg_d_invk_solver, amg_protect_name => amg_d_invk_solver_descr
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_invk_solver_type), intent(in) :: sv
+  integer(psb_ipk_), intent(out)            :: info
+  integer(psb_ipk_), intent(in), optional   :: iout
+  logical, intent(in), optional             :: coarse
+
+  ! Local variables
+  integer(psb_ipk_)  :: err_act
+  integer(psb_ipk_)  :: me, np
+  type(psb_ctxt_type) :: ctxt
+  character(len=20), parameter :: name='amg_d_invk_solver_descr'
+  integer(psb_ipk_) :: iout_
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+  if (present(iout)) then
+    iout_ = iout
+  else
+    iout_ = 6
+  endif
+
+  write(iout_,*) '  INVK Approximate Inverse with ILU(N) '
+  write(iout_,*) '  Fill level             :',sv%fill_in
+  write(iout_,*) '  Inverse fill level     :',sv%inv_fill
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_invk_solver_descr

amgprec/impl/solver/amg_d_invk_solver_seti.f90

@@ -0,0 +1,69 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_invk_solver_seti(sv,what,val,info)
+
+
+  use psb_base_mod
+  use amg_d_invk_solver, amg_protect_name => amg_d_invk_solver_seti
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_invk_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(in)                :: what
+  integer(psb_ipk_), intent(in)                :: val
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='d_invk_solver_seti'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+  select case(what)
+  case(amg_sub_fillin_)
+    sv%fill_in   = val
+  case(amg_inv_fillin_)
+    sv%inv_fill  = val
+  case default
+    ! call sv%amg_d_base_solver_type%set(what,val,info)
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_invk_solver_seti

amgprec/impl/solver/amg_d_invt_solver_bld.f90

@@ -0,0 +1,97 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_invt_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+
+  use psb_base_mod
+  use psb_d_invt_fact_mod ! This module contains the construction routines
+  use amg_d_invt_solver, amg_protect_name => amg_d_invt_solver_bld
+
+  Implicit None
+
+  ! Arguments
+  type(psb_dspmat_type), intent(in), target           :: a
+  Type(psb_desc_type), Intent(inout)                  :: desc_a
+  class(amg_d_invt_solver_type), intent(inout)        :: sv
+  integer(psb_ipk_), intent(out)                      :: info
+  type(psb_dspmat_type), intent(in), target, optional :: b
+  class(psb_d_base_sparse_mat), intent(in), optional  :: amold
+  class(psb_d_base_vect_type), intent(in), optional   :: vmold
+  class(psb_i_base_vect_type), intent(in), optional   :: imold
+
+  ! Local variables
+  integer(psb_ipk_) :: n_row,n_col, nrow_a, nztota
+  real(psb_dpk_), pointer :: ww(:), aux(:), tx(:),ty(:)
+  integer(psb_ipk_) :: np,me,i, err_act, debug_unit, debug_level
+  type(psb_ctxt_type) :: ctxt
+  character(len=20) :: name='amg_d_invt_solver_bld', ch_err
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+  debug_unit  = psb_get_debug_unit()
+  debug_level = psb_get_debug_level()
+  ctxt       = desc_a%get_context()
+  call psb_info(ctxt, me, np)
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) me,' ',trim(name),' start'
+
+
+  call psb_invt_fact(a,sv%fill_in,sv%inv_fill,&
+       & sv%thresh,sv%inv_thresh,&
+       & sv%w,sv%d,sv%z,desc_a,info,b)
+
+  if ((info == psb_success_) .and.present(amold)) then
+    call sv%w%cscnv(info,mold=amold)
+    if (info == psb_success_) &
+         & call sv%z%cscnv(info,mold=amold)
+  end if
+
+  if (info == psb_success_) then
+    call sv%dv%bld(sv%d,mold=vmold)
+  end if
+
+  if (info /= psb_success_) then
+    call psb_errpush(psb_err_internal_error_,name)
+    goto 9999
+  end if
+
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) me,' ',trim(name),' end'
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_invt_solver_bld

amgprec/impl/solver/amg_d_invt_solver_check.f90

@@ -0,0 +1,69 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_invt_solver_check(sv,info)
+
+
+  use psb_base_mod
+  use amg_d_invt_solver, amg_protect_name => amg_d_invt_solver_check
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_invt_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  Integer(Psb_Ipk_)  :: err_act
+  character(len=20) :: name='amg_d_invt_solver_check'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+
+  call amg_check_def(sv%fill_in,&
+       & 'Level',izero,is_int_non_negative)
+  call amg_check_def(sv%inv_fill,&
+       & 'Level',izero,is_int_non_negative)
+  call amg_check_def(sv%thresh,&
+       & 'Eps',dzero,is_legal_d_fact_thrs)
+  call amg_check_def(sv%inv_thresh,&
+       & 'Eps',dzero,is_legal_d_fact_thrs)
+
+  if (info /= psb_success_) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_invt_solver_check

amgprec/impl/solver/amg_d_invt_solver_clone.f90

@@ -0,0 +1,92 @@
+!  
+!
+!                             AMG4PSBLAS version 1.0
+!    MultiLevel Domain Decomposition Parallel Preconditioners Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.0)
+!
+!    (C) Copyright 2008,2009,2010,2010,2012
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!                        Alfredo Buttari      CNRS-IRIT, Toulouse
+!                        Pasqua D'Ambra       ICAR-CNR, Naples
+!                        Daniela di Serafino  Second University of Naples
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_invt_solver_clone(sv,svout,info)
+
+  use psb_base_mod
+  use amg_d_invt_solver, amg_protect_name => amg_d_invt_solver_clone
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_invt_solver_type), intent(inout)              :: sv
+  class(amg_d_base_solver_type), allocatable, intent(inout) :: svout
+  integer(psb_ipk_), intent(out)                            :: info
+  ! Local variables
+  integer(psb_ipk_) :: err_act
+
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+
+  if (allocated(svout)) then
+    call svout%free(info)
+    if (info == psb_success_) deallocate(svout, stat=info)
+  end if
+  if (info == psb_success_) &
+       & allocate(amg_d_invt_solver_type :: svout, stat=info)
+  if (info /= 0) then
+    info = psb_err_alloc_dealloc_
+    goto 9999
+  end if
+  select type(svo => svout)
+  type is (amg_d_invt_solver_type)
+    svo%fill_in    = sv%fill_in
+    svo%inv_fill   = sv%inv_fill
+    svo%thresh     = sv%thresh
+    svo%inv_thresh = sv%inv_thresh
+    call psb_safe_ab_cpy(sv%d,svo%d,info)
+    if (info == psb_success_) &
+         & call sv%dv%clone(svo%dv,info)
+    if (info == psb_success_) &
+         & call sv%w%clone(svo%w,info)
+    if (info == psb_success_) &
+         & call sv%z%clone(svo%z,info)
+
+  class default
+    info = psb_err_internal_error_
+  end select
+
+  if (info /= 0) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_invt_solver_clone

amgprec/impl/solver/amg_d_invt_solver_cseti.f90

@@ -0,0 +1,69 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_invt_solver_cseti(sv,what,val,info,idx)
+
+  use psb_base_mod
+  use amg_d_invt_solver, amg_protect_name => amg_d_invt_solver_cseti
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_invt_solver_type), intent(inout) :: sv
+  character(len=*), intent(in)                 :: what
+  integer(psb_ipk_), intent(in)                :: val
+  integer(psb_ipk_), intent(out)               :: info
+  integer(psb_ipk_), intent(in), optional      :: idx
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='amg_d_invt_solver_cseti'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+  select case(psb_toupper(what))
+  case('SUB_FILLIN')
+    sv%fill_in   = val
+  case('INV_FILLIN')
+    sv%inv_fill  = val
+  case default
+    call sv%amg_d_base_solver_type%set(what,val,info)
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_invt_solver_cseti

amgprec/impl/solver/amg_d_invt_solver_csetr.f90

@@ -0,0 +1,69 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_invt_solver_csetr(sv,what,val,info,idx)
+
+  use psb_base_mod
+  use amg_d_invt_solver, amg_protect_name => amg_d_invt_solver_csetr
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_invt_solver_type), intent(inout) :: sv
+  character(len=*), intent(in)                 :: what
+  real(psb_dpk_), intent(in)                   :: val
+  integer(psb_ipk_), intent(out)               :: info
+  integer(psb_ipk_), intent(in), optional      :: idx
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='amg_d_invt_solver_csetr'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+
+  select case(psb_toupper(what))
+  case('SUB_ILUTHRS')
+    sv%thresh = val
+  case('INV_THRESH')
+    sv%inv_thresh = val
+  case default
+    call sv%amg_d_base_solver_type%set(what,val,info)
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_invt_solver_csetr

amgprec/impl/solver/amg_d_invt_solver_descr.f90

@@ -0,0 +1,74 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_invt_solver_descr(sv,info,iout,coarse)
+
+
+  use psb_base_mod
+  use amg_d_invt_solver, amg_protect_name => amg_d_invt_solver_descr
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_invt_solver_type), intent(in) :: sv
+  integer(psb_ipk_), intent(out)            :: info
+  integer(psb_ipk_), intent(in), optional   :: iout
+  logical, intent(in), optional             :: coarse
+
+  ! Local variables
+  integer(psb_ipk_) :: err_act
+  integer(psb_ipk_) :: ictxt, me, np
+  character(len=20), parameter :: name='amg_d_invt_solver_descr'
+  integer(psb_ipk_) :: iout_
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+  if (present(iout)) then
+    iout_ = iout
+  else
+    iout_ = 6
+  endif
+
+  write(iout_,*) '  INVT Approximate Inverse with ILU(T,P) '
+  write(iout_,*) '  Fill level             :',sv%fill_in
+  write(iout_,*) '  Fill threshold         :',sv%thresh
+  write(iout_,*) '  Inverse fill level     :',sv%inv_fill
+  write(iout_,*) '  Inverse fill threshold :',sv%inv_thresh
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_invt_solver_descr

amgprec/impl/solver/amg_d_invt_solver_seti.f90

@@ -0,0 +1,70 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_invt_solver_seti(sv,what,val,info)
+
+
+  use psb_base_mod
+  use amg_d_invt_solver, amg_protect_name => amg_d_invt_solver_seti
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_invt_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(in)                :: what
+  integer(psb_ipk_), intent(in)                :: val
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  Integer(Psb_Ipk_) :: err_act
+  character(len=20) :: name='amg_d_invt_solver_seti'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+  select case(what)
+  case(amg_sub_fillin_)
+    sv%fill_in   = val
+  case(amg_inv_fillin_)
+    sv%inv_fill  = val
+  case default
+!!$      write(0,*) name,': Error: invalid WHAT'
+!!$      info = -2
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_invt_solver_seti

amgprec/impl/solver/amg_d_invt_solver_setr.f90

@@ -0,0 +1,69 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_d_invt_solver_setr(sv,what,val,info)
+
+
+  use psb_base_mod
+  use amg_d_invt_solver, amg_protect_name => amg_d_invt_solver_setr
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_invt_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(in)                :: what
+  real(psb_dpk_), intent(in)                   :: val
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  Integer(Psb_Ipk_) :: err_act
+  character(len=20) :: name='amg_d_invt_solver_setr'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+
+  select case(what)
+  case(amg_sub_iluthrs_)
+    sv%thresh = val
+  case(amg_inv_thresh_)
+    sv%inv_thresh = val
+  case default
+    ! call sv%amg_d_base_solver_type%set(what,val,info)
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_d_invt_solver_setr

amgprec/impl/solver/amg_s_ainv_solver_bld.f90

@@ -0,0 +1,98 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_s_ainv_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+
+
+  use psb_base_mod
+  use psb_s_ainv_fact_mod
+  use amg_s_ainv_solver, amg_protect_name => amg_s_ainv_solver_bld
+
+  Implicit None
+
+  ! Arguments
+  type(psb_sspmat_type), intent(in), target    :: a
+  Type(psb_desc_type), Intent(inout)           :: desc_a
+  class(amg_s_ainv_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(out)                      :: info
+  type(psb_sspmat_type), intent(in), target, optional :: b
+  class(psb_s_base_sparse_mat), intent(in), optional  :: amold
+  class(psb_s_base_vect_type), intent(in), optional   :: vmold
+  class(psb_i_base_vect_type), intent(in), optional   :: imold
+  ! Local variables
+  integer(psb_ipk_)  :: n_row,n_col, nrow_a, nztota
+  real(psb_spk_), pointer :: ww(:), aux(:), tx(:),ty(:)
+  integer(psb_ipk_)  :: np,me,i, err_act, debug_unit, debug_level
+  type(psb_ctxt_type) :: ctxt
+  character(len=20)  :: name='amg_s_ainv_solver_bld', ch_err
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+  debug_unit  = psb_get_debug_unit()
+  debug_level = psb_get_debug_level()
+  ctxt       = desc_a%get_context()
+  call psb_info(ctxt, me, np)
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) me,' ',trim(name),' start'
+
+  call psb_s_ainv_bld(a,sv%alg,sv%fill_in,sv%thresh,&
+       & sv%w,sv%d,sv%z,desc_a,info,b,iscale=amg_ilu_scale_maxval_)
+
+  if ((info == psb_success_) .and.present(amold)) then
+    call sv%w%set_asb()
+    call sv%w%trim()
+    call sv%z%set_asb()
+    call sv%z%trim()
+    call sv%w%cscnv(info,mold=amold)
+    if (info == psb_success_) &
+         & call sv%z%cscnv(info,mold=amold)
+  end if
+
+  if (info == psb_success_) &
+       & call sv%dv%bld(sv%d,mold=vmold)
+
+  if (info /= psb_success_) then
+    call psb_errpush(psb_err_internal_error_,name)
+    goto 9999
+  end if
+
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) me,' ',trim(name),' end'
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_s_ainv_solver_bld

amgprec/impl/solver/amg_s_ainv_solver_check.f90

@@ -0,0 +1,65 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_s_ainv_solver_check(sv,info)
+
+
+  use psb_base_mod
+  use amg_s_ainv_solver, amg_protect_name => amg_s_ainv_solver_check
+
+  Implicit None
+
+  ! Arguments
+  class(amg_s_ainv_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='amg_s_ainv_solver_check'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+
+  call amg_check_def(sv%fill_in,&
+       & 'Nzmin',ione,is_positive_nz_min)
+  call amg_check_def(sv%thresh,&
+       & 'Eps',szero,is_legal_s_fact_thrs)
+
+  if (info /= psb_success_) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_s_ainv_solver_check

amgprec/impl/solver/amg_s_ainv_solver_clone.f90

@@ -0,0 +1,91 @@
+!
+!
+!                             AMG4PSBLAS version 1.0
+!    MultiLevel Domain Decomposition Parallel Preconditioners Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.0)
+!
+!    (C) Copyright 2008,2009,2010,2010,2012
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!                        Alfredo Buttari      CNRS-IRIT, Toulouse
+!                        Pasqua D'Ambra       ICAR-CNR, Naples
+!                        Daniela di Serafino  Second University of Naples
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_s_ainv_solver_clone(sv,svout,info)
+
+  use psb_base_mod
+  use amg_s_ainv_solver, amg_protect_name => amg_s_ainv_solver_clone
+
+  Implicit None
+
+  ! Arguments
+  class(amg_s_ainv_solver_type), intent(inout)              :: sv
+  class(amg_s_base_solver_type), allocatable, intent(inout) :: svout
+  integer(psb_ipk_), intent(out)                            :: info
+  ! Local variables
+  integer(psb_ipk_) :: err_act
+
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+
+  if (allocated(svout)) then
+    call svout%free(info)
+    if (info == psb_success_) deallocate(svout, stat=info)
+  end if
+  if (info == psb_success_) &
+       & allocate(amg_s_ainv_solver_type :: svout, stat=info)
+  if (info /= 0) then
+    info = psb_err_alloc_dealloc_
+    goto 9999
+  end if
+  select type(svo => svout)
+  type is (amg_s_ainv_solver_type)
+    svo%alg      = sv%alg
+    svo%fill_in  = sv%fill_in
+    svo%thresh   = sv%thresh
+    call psb_safe_ab_cpy(sv%d,svo%d,info)
+    if (info == psb_success_) &
+         & call sv%dv%clone(svo%dv,info)
+    if (info == psb_success_) &
+         & call sv%w%clone(svo%w,info)
+    if (info == psb_success_) &
+         & call sv%z%clone(svo%z,info)
+
+  class default
+    info = psb_err_internal_error_
+  end select
+
+  if (info /= 0) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_s_ainv_solver_clone

amgprec/impl/solver/amg_s_ainv_solver_csetc.f90

@@ -0,0 +1,79 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_s_ainv_solver_csetc(sv,what,val,info,idx)
+
+
+  use psb_base_mod
+  use amg_s_ainv_solver, amg_protect_name => amg_s_ainv_solver_csetc
+
+  Implicit None
+
+  ! Arguments
+  class(amg_s_ainv_solver_type), intent(inout) :: sv
+  character(len=*), intent(in)                 :: what
+  character(len=*), intent(in)                 :: val
+  integer(psb_ipk_), intent(out)               :: info
+  integer(psb_ipk_), intent(in), optional      :: idx
+  !
+  integer(psb_ipk_ ) :: err_act, ival
+  character(len=20)  :: name='amg_s_ainv_solver_setc'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+!!$  select case(psb_toupper(trim(what)))
+!!$  case('AINV_ALG')
+!!$    sv%alg  = sv%stringval(val)
+!!$  case default
+!!$    call sv%mld_d_base_solver_type%set(what,val,info)
+!!$  end select
+  ival =  sv%stringval(val)
+
+  if (ival >=0) then
+    call sv%set(what,ival,info)
+  end if
+
+  if (info /= psb_success_) then
+    info = psb_err_from_subroutine_
+    call psb_errpush(info, name)
+    goto 9999
+  end if
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_s_ainv_solver_csetc

amgprec/impl/solver/amg_s_ainv_solver_cseti.f90

@@ -0,0 +1,69 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_s_ainv_solver_cseti(sv,what,val,info,idx)
+
+  use psb_base_mod
+  use amg_s_ainv_solver, amg_protect_name => amg_s_ainv_solver_cseti
+
+  Implicit None
+
+  ! Arguments
+  class(amg_s_ainv_solver_type), intent(inout) :: sv
+  character(len=*), intent(in)                 :: what
+  integer(psb_ipk_), intent(in)                :: val
+  integer(psb_ipk_), intent(out)               :: info
+  integer(psb_ipk_), intent(in), optional      :: idx
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='amg_s_ainv_solver_cseti'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+  select case(psb_toupper(trim(what)))
+  case('SUB_FILLIN')
+    sv%fill_in  = val
+  case('AINV_ALG')
+    sv%alg      = val
+  case default
+    call sv%amg_s_base_solver_type%set(what,val,info)
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_s_ainv_solver_cseti

amgprec/impl/solver/amg_s_ainv_solver_csetr.f90

@@ -0,0 +1,67 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_s_ainv_solver_csetr(sv,what,val,info,idx)
+
+  use psb_base_mod
+  use amg_s_ainv_solver, amg_protect_name => amg_s_ainv_solver_csetr
+
+  Implicit None
+
+  ! Arguments
+  class(amg_s_ainv_solver_type), intent(inout) :: sv
+  character(len=*), intent(in)                 :: what
+  real(psb_spk_), intent(in)                   :: val
+  integer(psb_ipk_), intent(out)               :: info
+  integer(psb_ipk_), intent(in), optional      :: idx
+  !
+  integer(psb_ipk_) :: err_act
+  character(len=20) :: name='amg_s_ainv_solver_csetr'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+
+  select case(psb_toupper(what))
+  case('SUB_ILUTHRS')
+    sv%thresh = val
+  case default
+    call sv%amg_s_base_solver_type%set(what,val,info)
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_s_ainv_solver_csetr

amgprec/impl/solver/amg_s_ainv_solver_descr.f90

@@ -0,0 +1,73 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_s_ainv_solver_descr(sv,info,iout,coarse)
+
+
+  use psb_base_mod
+  use amg_s_ainv_solver, amg_protect_name => amg_s_ainv_solver_descr
+
+  Implicit None
+
+  ! Arguments
+  class(amg_s_ainv_solver_type), intent(in) :: sv
+  integer(psb_ipk_), intent(out)            :: info
+  integer(psb_ipk_), intent(in), optional   :: iout
+  logical, intent(in), optional             :: coarse
+
+  ! Local variables
+  integer(psb_ipk_)      :: err_act
+  integer(psb_ipk_)      :: ictxt, me, np
+  character(len=20), parameter :: name='amg_s_ainv_solver_descr'
+  integer(psb_ipk_)      :: iout_
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+  if (present(iout)) then
+    iout_ = iout
+  else
+    iout_ = 6
+  endif
+
+  write(iout_,*) '  AINV: Approximate Inverse with sparse biconjugation '
+  write(iout_,*) '  Algorithm variant      : ',sv%algname(sv%alg)
+  write(iout_,*) '  Fill level             : ',sv%fill_in
+  write(iout_,*) '  Fill threshold         : ',sv%thresh
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_s_ainv_solver_descr

amgprec/impl/solver/amg_s_ainv_solver_setc.f90

@@ -0,0 +1,71 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_s_ainv_solver_setc(sv,what,val,info)
+
+
+  use psb_base_mod
+  use amg_s_ainv_solver, amg_protect_name => amg_s_ainv_solver_setc
+
+  Implicit None
+
+  ! Arguments
+  class(amg_s_ainv_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(in)                :: what
+  character(len=*), intent(in)                 :: val
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  integer(psb_ipk_)  :: err_act, ival
+  character(len=20)  :: name='amg_s_ainv_solver_setc'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+  ival =  sv%stringval(val)
+  if (ival >=0) then
+    call sv%set(what,ival,info)
+  end if
+
+  if (info /= psb_success_) then
+    info = psb_err_from_subroutine_
+    call psb_errpush(info, name)
+    goto 9999
+  end if
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_s_ainv_solver_setc

amgprec/impl/solver/amg_s_ainv_solver_seti.f90

@@ -0,0 +1,70 @@
+!  
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_s_ainv_solver_seti(sv,what,val,info)
+
+
+  use psb_base_mod
+  use amg_s_ainv_solver, amg_protect_name => amg_s_ainv_solver_seti
+
+  Implicit None
+
+  ! Arguments
+  class(amg_s_ainv_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(in)                :: what
+  integer(psb_ipk_), intent(in)                :: val
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  integer(psb_ipk_)  :: err_act
+  character(len=20)  :: name='amg_s_ainv_solver_seti'
+
+  info = psb_success_
+  call psb_erractionsave(err_act)
+
+  select case(what)
+  case(amg_sub_fillin_)
+    sv%fill_in  = val
+  case(amg_ainv_alg_)
+    sv%alg      = val
+  case default
+!!$      write(0,*) name,': Error: invalid WHAT'
+!!$      info = -2
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_s_ainv_solver_seti

amgprec/impl/solver/amg_s_ainv_solver_setr.f90

@@ -0,0 +1,69 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_s_ainv_solver_setr(sv,what,val,info)
+
+
+  use psb_base_mod
+  use amg_s_ainv_solver, amg_protect_name => amg_s_ainv_solver_setr
+
+  Implicit None
+
+  ! Arguments
+  class(amg_s_ainv_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(in)                :: what
+  real(psb_spk_), intent(in)                   :: val
+  integer(psb_ipk_), intent(out)               :: info
+  !
+  integer(psb_ipk_)  :: err_act
+  character(len=20)  :: name='amg_s_ainv_solver_setr'
+
+  call psb_erractionsave(err_act)
+  info = psb_success_
+
+  select case(what)
+  case(amg_sub_iluthrs_)
+    sv%thresh = val
+  case default
+!!$      write(0,*) name,': Error: invalid WHAT'
+!!$      info = -2
+!!$      goto 9999
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_s_ainv_solver_setr

amgprec/impl/solver/amg_s_base_ainv_solver_apply.f90

@@ -0,0 +1,153 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_s_base_ainv_solver_apply(alpha,sv,x,beta,y,desc_data,&
+     & trans,work,info,init,initu)
+
+  use psb_base_mod
+  use amg_s_base_ainv_mod, amg_protect_name => amg_s_base_ainv_solver_apply
+  implicit none
+  type(psb_desc_type), intent(in)        :: desc_data
+  class(amg_s_base_ainv_solver_type), intent(inout) :: sv
+  real(psb_spk_),intent(inout)           :: x(:)
+  real(psb_spk_),intent(inout)           :: y(:)
+  real(psb_spk_),intent(in)              :: alpha,beta
+  character(len=1),intent(in)            :: trans
+  real(psb_spk_),target, intent(inout)   :: work(:)
+  integer(psb_ipk_), intent(out)         :: info
+  character, intent(in), optional        :: init
+  real(psb_spk_),intent(inout), optional :: initu(:)
+  !
+  integer(psb_ipk_)  :: n_row,n_col
+  real(psb_spk_), pointer :: ww(:), aux(:), tx(:),ty(:)
+  integer(psb_ipk_)  :: np,me,i, err_act
+  type(psb_ctxt_type)   :: ctxt
+  character          :: trans_
+  character(len=20)  :: name='d_base_ainv_solver_apply'
+
+  call psb_erractionsave(err_act)
+
+  info = psb_success_
+
+  trans_ = psb_toupper(trans)
+  select case(trans_)
+  case('N')
+  case('T','C')
+  case default
+    call psb_errpush(psb_err_iarg_invalid_i_,name)
+    goto 9999
+  end select
+  !
+  ! For non-iterative solvers, init and initu are ignored.
+  !
+
+  n_row = psb_cd_get_local_rows(desc_data)
+  n_col = psb_cd_get_local_cols(desc_data)
+
+  if (n_col <= size(work)) then
+    ww => work(1:n_col)
+    if ((4*n_col+n_col) <= size(work)) then
+      aux => work(n_col+1:)
+    else
+      allocate(aux(4*n_col),stat=info)
+      if (info /= psb_success_) then
+        info=psb_err_alloc_request_
+        call psb_errpush(info,name,i_err=(/4*n_col/),&
+             & a_err='real(psb_dpk_)')
+        goto 9999
+      end if
+    endif
+  else
+    allocate(ww(n_col),aux(4*n_col),stat=info)
+    if (info /= psb_success_) then
+      info=psb_err_alloc_request_
+      call psb_errpush(info,name,i_err=(/5*n_col/),&
+           & a_err='real(psb_dpk_)')
+      goto 9999
+    end if
+  endif
+
+  select case(trans_)
+  case('N')
+    call psb_spmm(sone,sv%w,x,szero,ww,desc_data,info,&
+         & trans=trans_,work=aux,doswap=.false.)
+    ww(1:n_row) = ww(1:n_row) * sv%d(1:n_row)
+    if (info == psb_success_) &
+         & call psb_spmm(alpha,sv%z,ww,beta,y,desc_data,info,&
+         & trans=trans_,work=aux,doswap=.false.)
+
+  case('T','C')
+    call psb_spmm(sone,sv%z,x,szero,ww,desc_data,info,&
+         & trans=trans_,work=aux,doswap=.false.)
+    ww(1:n_row) = ww(1:n_row) * sv%d(1:n_row)
+    if (info == psb_success_) &
+         & call psb_spmm(alpha,sv%w,ww,beta,y,desc_data,info,&
+         & trans=trans_,work=aux,doswap=.false.)
+
+  case default
+    call psb_errpush(psb_err_internal_error_,name,&
+         & a_err='Invalid TRANS in ainv subsolve')
+    goto 9999
+  end select
+
+
+  if (info /= psb_success_) then
+
+    call psb_errpush(psb_err_internal_error_,name,&
+         & a_err='Error in subsolve')
+    goto 9999
+  endif
+
+  if (n_col <= size(work)) then
+    if ((4*n_col+n_col) <= size(work)) then
+    else
+      deallocate(aux,stat=info)
+    endif
+  else
+    deallocate(ww,aux,stat=info)
+  endif
+
+  if (info /= psb_success_) then
+
+    call psb_errpush(psb_err_internal_error_,name,&
+         & a_err='Deallocate')
+    goto 9999
+  endif
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_s_base_ainv_solver_apply

amgprec/impl/solver/amg_s_base_ainv_solver_apply_vect.f90

@@ -0,0 +1,167 @@
+!
+!
+!                       AMG-AINV: Approximate Inverse plugin for
+!                             AMG4PSBLAS version 1.0
+!
+!    (C) Copyright 2020
+!
+!                        Salvatore Filippone  University of Rome Tor Vergata
+!
+!    Redistribution and use in source and binary forms, with or without
+!    modification, are permitted provided that the following conditions
+!    are met:
+!      1. Redistributions of source code must retain the above copyright
+!         notice, this list of conditions and the following disclaimer.
+!      2. Redistributions in binary form must reproduce the above copyright
+!         notice, this list of conditions, and the following disclaimer in the
+!         documentation and/or other materials provided with the distribution.
+!      3. The name of the AMG4PSBLAS group or the names of its contributors may
+!         not be used to endorse or promote products derived from this
+!         software without specific written permission.
+!
+!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+!    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+!    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
+!    BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+!    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+!    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+!    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+!    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+!    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+!    POSSIBILITY OF SUCH DAMAGE.
+!
+!
+subroutine amg_s_base_ainv_solver_apply_vect(alpha,sv,x,beta,y,desc_data,&
+     & trans,work,wv,info,init,initu)
+
+  use psb_base_mod
+  use amg_s_base_ainv_mod, amg_protect_name => amg_s_base_ainv_solver_apply_vect
+  implicit none
+  type(psb_desc_type), intent(in)               :: desc_data
+  class(amg_s_base_ainv_solver_type), intent(inout) :: sv
+  type(psb_s_vect_type), intent(inout)          :: x
+  type(psb_s_vect_type), intent(inout)          :: y
+  real(psb_spk_), intent(in)                    :: alpha,beta
+  character(len=1), intent(in)                  :: trans
+  real(psb_spk_),target, intent(inout)          :: work(:)
+  type(psb_s_vect_type),intent(inout)           :: wv(:)
+  integer(psb_ipk_), intent(out)                :: info
+  character, intent(in), optional               :: init
+  type(psb_s_vect_type),intent(inout), optional :: initu
+  !
+  integer(psb_ipk_)     :: n_row,n_col
+  real(psb_spk_), pointer :: ww(:), aux(:)
+  type(psb_s_vect_type) :: tx,ty
+  integer(psb_ipk_)     :: np,me,i, err_act
+  type(psb_ctxt_type)   :: ctxt
+  character             :: trans_
+  character(len=20)     :: name='d_base_ainv_solver_apply'
+
+  call psb_erractionsave(err_act)
+
+  info = psb_success_
+
+  trans_ = psb_toupper(trans)
+  select case(trans_)
+  case('N')
+  case('T','C')
+  case default
+    call psb_errpush(psb_err_iarg_invalid_i_,name)
+    goto 9999
+  end select
+  !
+  ! For non-iterative solvers, init and initu are ignored.
+  !
+
+  n_row = psb_cd_get_local_rows(desc_data)
+  n_col = psb_cd_get_local_cols(desc_data)
+
+  if (n_col <= size(work)) then
+    ww => work(1:n_col)
+    if ((4*n_col+n_col) <= size(work)) then
+      aux => work(n_col+1:)
+    else
+      allocate(aux(4*n_col),stat=info)
+      if (info /= psb_success_) then
+        info=psb_err_alloc_request_
+        call psb_errpush(info,name,i_err=(/4*n_col/),&
+             & a_err='real(psb_dpk_)')
+        goto 9999
+      end if
+    endif
+  else
+    allocate(ww(n_col),aux(4*n_col),stat=info)
+    if (info /= psb_success_) then
+      info=psb_err_alloc_request_
+      call psb_errpush(info,name,i_err=(/5*n_col/),&
+           & a_err='real(psb_dpk_)')
+      goto 9999
+    end if
+  endif
+
+  if (size(wv) < 2) then
+    info = psb_err_internal_error_
+    call psb_errpush(info,name,&
+         & a_err='invalid wv size')
+    goto 9999
+  end if
+
+
+  associate(tx => wv(1), ty => wv(2))
+
+    select case(trans_)
+    case('N')
+      call psb_spmm(sone,sv%w,x,szero,tx,desc_data,info,&
+           & trans=trans_,work=aux,doswap=.false.)
+      if (info == psb_success_) call ty%mlt(sone,sv%dv,tx,szero,info)
+      if (info == psb_success_) &
+           & call psb_spmm(alpha,sv%z,ty,beta,y,desc_data,info,&
+           & trans=trans_,work=aux,doswap=.false.)
+
+    case('T','C')
+      call psb_spmm(sone,sv%z,x,szero,tx,desc_data,info,&
+           & trans=trans_,work=aux,doswap=.false.)
+      if (info == psb_success_) call ty%mlt(sone,sv%dv,tx,szero,info)
+      if (info == psb_success_) &
+           & call psb_spmm(alpha,sv%w,ty,beta,y,desc_data,info,&
+           & trans=trans_,work=aux,doswap=.false.)
+
+    case default
+      call psb_errpush(psb_err_internal_error_,name,&
+           & a_err='Invalid TRANS in ainv subsolve')
+      goto 9999
+    end select
+
+
+    if (info /= psb_success_) then
+
+      call psb_errpush(psb_err_internal_error_,name,&
+           & a_err='Error in subsolve')
+      goto 9999
+    endif
+
+  end associate
+
+  if (n_col <= size(work)) then
+    if ((4*n_col+n_col) <= size(work)) then
+    else
+      deallocate(aux,stat=info)
+    endif
+  else
+    deallocate(ww,aux,stat=info)
+  endif
+
+  if (info /= psb_success_) then
+
+    call psb_errpush(psb_err_internal_error_,name,&
+         & a_err='Deallocate')
+    goto 9999
+  endif
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+  return
+end subroutine amg_s_base_ainv_solver_apply_vect