Defined Jacobi and L1-JACOBI solvers.

amgprec/Makefile

@@ -11,7 +11,7 @@ DMODOBJS=amg_d_prec_type.o \
 	amg_d_inner_mod.o amg_d_ilu_solver.o amg_d_diag_solver.o amg_d_jac_smoother.o amg_d_as_smoother.o \
 	amg_d_umf_solver.o amg_d_slu_solver.o amg_d_sludist_solver.o amg_d_id_solver.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_gs_solver.o amg_d_mumps_solver.o amg_d_jac_solver.o \
 	amg_d_base_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 \
@@ -22,7 +22,7 @@ SMODOBJS=amg_s_prec_type.o amg_s_ilu_fact_mod.o \
 	amg_s_inner_mod.o amg_s_ilu_solver.o amg_s_diag_solver.o amg_s_jac_smoother.o amg_s_as_smoother.o \
 	amg_s_slu_solver.o amg_s_id_solver.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_gs_solver.o amg_s_mumps_solver.o  amg_s_jac_solver.o \
 	amg_s_base_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 \
@@ -33,7 +33,7 @@ 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 \
 	amg_z_umf_solver.o amg_z_slu_solver.o amg_z_sludist_solver.o amg_z_id_solver.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_gs_solver.o amg_z_mumps_solver.o  amg_z_jac_solver.o \
 	amg_z_base_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 \
@@ -43,7 +43,7 @@ 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 \
 	amg_c_slu_solver.o amg_c_id_solver.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_gs_solver.o amg_c_mumps_solver.o  amg_c_jac_solver.o \
 	amg_c_base_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 \
@@ -155,7 +155,7 @@ 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
 
 amg_d_mumps_solver.o amg_d_gs_solver.o amg_d_id_solver.o amg_d_sludist_solver.o amg_d_slu_solver.o \
-amg_d_umf_solver.o amg_d_diag_solver.o amg_d_ilu_solver.o: amg_d_base_solver_mod.o  amg_d_prec_type.o
+amg_d_umf_solver.o amg_d_diag_solver.o amg_d_ilu_solver.o amg_d_jac_solver.o: amg_d_base_solver_mod.o  amg_d_prec_type.o
 
 #amg_d_ilu_fact_mod.o: amg_base_prec_type.o  amg_d_base_solver_mod.o
 #amg_d_ilu_solver.o amg_d_iluk_fact.o: amg_d_ilu_fact_mod.o
@@ -166,7 +166,7 @@ amg_dprecinit.o amg_dprecset.o: amg_d_diag_solver.o amg_d_ilu_solver.o \
 	        amg_d_id_solver.o amg_d_slu_solver.o amg_d_sludist_solver.o
 
 amg_s_mumps_solver.o amg_s_gs_solver.o amg_s_id_solver.o amg_s_slu_solver.o \
-amg_s_diag_solver.o amg_s_ilu_solver.o: amg_s_base_solver_mod.o  amg_s_prec_type.o
+amg_s_diag_solver.o amg_s_ilu_solver.o amg_s_jac_solver.o: amg_s_base_solver_mod.o  amg_s_prec_type.o
 amg_s_ilu_fact_mod.o: amg_base_prec_type.o  amg_s_base_solver_mod.o
 amg_s_ilu_solver.o amg_s_iluk_fact.o: amg_s_ilu_fact_mod.o
 amg_s_as_smoother.o amg_s_jac_smoother.o: amg_s_base_smoother_mod.o
@@ -176,7 +176,7 @@ amg_sprecinit.o amg_sprecset.o: amg_s_diag_solver.o amg_s_ilu_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_umf_solver.o amg_z_diag_solver.o amg_z_ilu_solver.o amg_z_jac_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_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
@@ -186,7 +186,7 @@ amg_zprecinit.o amg_zprecset.o: amg_z_diag_solver.o amg_z_ilu_solver.o \
 	        amg_z_id_solver.o amg_z_slu_solver.o amg_z_sludist_solver.o
 
 amg_c_mumps_solver.o amg_c_gs_solver.o amg_c_id_solver.o amg_c_sludist_solver.o amg_c_slu_solver.o \
-amg_c_diag_solver.o amg_c_ilu_solver.o: amg_c_base_solver_mod.o  amg_c_prec_type.o
+amg_c_diag_solver.o amg_c_ilu_solver.o amg_c_jac_solver.o: amg_c_base_solver_mod.o  amg_c_prec_type.o
 amg_c_ilu_fact_mod.o: amg_base_prec_type.o  amg_c_base_solver_mod.o
 amg_c_ilu_solver.o amg_c_iluk_fact.o: amg_c_ilu_fact_mod.o
 amg_c_as_smoother.o amg_c_jac_smoother.o: amg_c_base_smoother_mod.o

amgprec/amg_c_jac_solver.f90

@@ -0,0 +1,582 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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.
+!   
+!  
+!
+!
+! File: amg_c_jac_solver_mod.f90
+!
+! Module: amg_c_jac_solver_mod
+!
+!  This module defines: 
+!  - the amg_c_jac_solver_type data structure containing the ingredients
+!    for a local Jacobi  iteration. The iterations are local to a process
+!    (they operate on the block diagonal).
+!    
+!
+module amg_c_jac_solver
+
+  use amg_c_base_solver_mod
+
+  type, extends(amg_c_base_solver_type) :: amg_c_jac_solver_type
+    type(psb_cspmat_type)      :: a
+    type(psb_c_vect_type), allocatable :: dv
+    complex(psb_spk_), allocatable        :: d(:)
+    integer(psb_ipk_)          :: sweeps
+    real(psb_spk_)             :: eps
+  contains
+    procedure, pass(sv) :: dump    => amg_c_jac_solver_dmp
+    procedure, pass(sv) :: check   => c_jac_solver_check
+    procedure, pass(sv) :: clone   => amg_c_jac_solver_clone
+    procedure, pass(sv) :: clone_settings => amg_c_jac_solver_clone_settings
+    procedure, pass(sv) :: clear_data     => amg_c_jac_solver_clear_data
+    procedure, pass(sv) :: build   => amg_c_jac_solver_bld
+    procedure, pass(sv) :: cnv     => amg_c_jac_solver_cnv
+    procedure, pass(sv) :: apply_v => amg_c_jac_solver_apply_vect
+    procedure, pass(sv) :: apply_a => amg_c_jac_solver_apply
+    procedure, pass(sv) :: free    => c_jac_solver_free
+    procedure, pass(sv) :: cseti   => c_jac_solver_cseti
+    procedure, pass(sv) :: csetc   => c_jac_solver_csetc
+    procedure, pass(sv) :: csetr   => c_jac_solver_csetr
+    procedure, pass(sv) :: descr   => c_jac_solver_descr
+    procedure, pass(sv) :: default => c_jac_solver_default
+    procedure, pass(sv) :: sizeof  => c_jac_solver_sizeof
+    procedure, pass(sv) :: get_nzeros => c_jac_solver_get_nzeros
+    procedure, nopass   :: get_wrksz  => c_jac_solver_get_wrksize
+    procedure, nopass   :: get_fmt    => c_jac_solver_get_fmt
+    procedure, nopass   :: get_id     => c_jac_solver_get_id
+    procedure, nopass   :: is_iterative => c_jac_solver_is_iterative
+  end type amg_c_jac_solver_type
+
+  type, extends(amg_c_jac_solver_type) :: amg_c_l1_jac_solver_type
+  contains
+    procedure, pass(sv) :: build   => amg_c_l1_jac_solver_bld
+    procedure, pass(sv) :: descr   => c_l1_jac_solver_descr
+    procedure, nopass   :: get_fmt    => c_l1_jac_solver_get_fmt
+    procedure, nopass   :: get_id     => c_l1_jac_solver_get_id
+  end type amg_c_l1_jac_solver_type
+
+
+  private :: c_jac_solver_bld, c_jac_solver_apply, &
+       &  c_jac_solver_free,   &
+       &  c_jac_solver_descr,  c_jac_solver_sizeof, &
+       &  c_jac_solver_default, c_jac_solver_dmp, &
+       &  c_jac_solver_apply_vect, c_jac_solver_get_nzeros, &
+       &  c_jac_solver_get_fmt, c_jac_solver_check,&
+       &  c_jac_solver_is_iterative, &
+       &  c_jac_solver_get_id, c_jac_solver_get_wrksize
+
+  interface 
+    subroutine amg_c_jac_solver_apply_vect(alpha,sv,x,beta,y,desc_data,&
+         & trans,work,wv,info,init,initu)
+      import :: psb_desc_type, amg_c_jac_solver_type, psb_c_vect_type, psb_spk_, &
+           & psb_cspmat_type, psb_c_base_sparse_mat, psb_c_base_vect_type, psb_ipk_
+      implicit none 
+      type(psb_desc_type), intent(in)             :: desc_data
+      class(amg_c_jac_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_jac_solver_apply_vect
+  end interface
+
+  interface 
+    subroutine amg_c_jac_solver_apply(alpha,sv,x,beta,y,desc_data,trans,work,info,init,initu)
+      import :: psb_desc_type, amg_c_jac_solver_type, psb_c_vect_type, psb_spk_, &
+           & psb_cspmat_type, psb_c_base_sparse_mat, psb_c_base_vect_type, psb_ipk_
+      implicit none 
+      type(psb_desc_type), intent(in)      :: desc_data
+      class(amg_c_jac_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_jac_solver_apply
+  end interface
+
+  interface 
+    subroutine amg_c_jac_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, amg_c_jac_solver_type, psb_c_vect_type, psb_spk_, &
+           & psb_cspmat_type, psb_c_base_sparse_mat, psb_c_base_vect_type,&
+           & psb_ipk_, psb_i_base_vect_type
+      implicit none 
+      type(psb_cspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a 
+      class(amg_c_jac_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_jac_solver_bld
+  end interface
+
+  interface 
+    subroutine amg_c_l1_jac_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, amg_c_l1_jac_solver_type, psb_c_vect_type, psb_spk_, &
+           & psb_cspmat_type, psb_c_base_sparse_mat, psb_c_base_vect_type,&
+           & psb_ipk_, psb_i_base_vect_type
+      implicit none 
+      type(psb_cspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a 
+      class(amg_c_l1_jac_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_l1_jac_solver_bld
+  end interface
+
+  interface 
+    subroutine amg_c_jac_solver_cnv(sv,info,amold,vmold,imold)
+      import :: amg_c_jac_solver_type, psb_spk_, &
+           & psb_c_base_sparse_mat, psb_c_base_vect_type,&
+           & psb_ipk_, psb_i_base_vect_type
+      implicit none 
+      class(amg_c_jac_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_jac_solver_cnv
+  end interface
+  
+  interface 
+    subroutine amg_c_jac_solver_dmp(sv,desc,level,info,prefix,head,solver,global_num)
+      import :: psb_desc_type, amg_c_jac_solver_type, psb_c_vect_type, psb_spk_, &
+           & psb_cspmat_type, psb_c_base_sparse_mat, psb_c_base_vect_type, &
+           & psb_ipk_
+      implicit none 
+      class(amg_c_jac_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_jac_solver_dmp
+  end interface
+  
+  interface
+    subroutine amg_c_jac_solver_clone(sv,svout,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_solver_type, amg_c_jac_solver_type, psb_ipk_
+      Implicit None
+      
+      ! Arguments
+      class(amg_c_jac_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_jac_solver_clone
+  end interface
+  
+!!$  interface
+!!$    subroutine amg_c_l1_jac_solver_clone(sv,svout,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_solver_type, amg_c_l1_jac_solver_type, psb_ipk_
+!!$      Implicit None
+!!$      
+!!$      ! Arguments
+!!$      class(amg_c_l1_jac_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_l1_jac_solver_clone
+!!$  end interface
+
+  interface
+    subroutine amg_c_jac_solver_clone_settings(sv,svout,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_solver_type, amg_c_jac_solver_type, psb_ipk_
+      Implicit None
+      
+      ! Arguments
+      class(amg_c_jac_solver_type), intent(inout) :: sv
+      class(amg_c_base_solver_type), intent(inout) :: svout
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_c_jac_solver_clone_settings
+  end interface
+
+  interface
+    subroutine amg_c_jac_solver_clear_data(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_jac_solver_type, psb_ipk_
+      Implicit None
+      
+      ! Arguments
+      class(amg_c_jac_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)                 :: info
+    end subroutine amg_c_jac_solver_clear_data
+  end interface
+
+contains
+
+  subroutine c_jac_solver_default(sv)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_c_jac_solver_type), intent(inout) :: sv
+
+    sv%sweeps = ione
+    sv%eps    = dzero
+    
+    return
+  end subroutine c_jac_solver_default
+
+  subroutine c_jac_solver_check(sv,info)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_c_jac_solver_type), intent(inout) :: sv
+    integer(psb_ipk_), intent(out)                :: info
+    integer(psb_ipk_) :: err_act
+    character(len=20) :: name='c_jac_solver_check'
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+
+    call amg_check_def(sv%sweeps,&
+         & 'Jacobi sweeps',ione,is_int_positive)
+
+    if (info /= psb_success_) goto 9999
+    
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+
+  end subroutine c_jac_solver_check
+
+  subroutine c_jac_solver_cseti(sv,what,val,info,idx)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_c_jac_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='c_jac_solver_cseti'
+
+    info = psb_success_
+    call psb_erractionsave(err_act)
+
+    select case(psb_toupper(what))
+    case('SOLVER_SWEEPS')
+      sv%sweeps = val      
+    case default
+      call sv%amg_c_base_solver_type%set(what,val,info,idx=idx)
+    end select
+
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine c_jac_solver_cseti
+
+  subroutine c_jac_solver_csetc(sv,what,val,info,idx)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_c_jac_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='c_jac_solver_csetc'
+
+    info = psb_success_
+    call psb_erractionsave(err_act)
+
+
+    call sv%amg_c_base_solver_type%set(what,val,info,idx=idx)
+  
+    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 c_jac_solver_csetc
+  
+  subroutine c_jac_solver_csetr(sv,what,val,info,idx)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_c_jac_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='c_jac_solver_csetr'
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+
+    select case(psb_toupper(what))
+    case('SOLVER_EPS') 
+      sv%eps = val
+    case default
+      call sv%amg_c_base_solver_type%set(what,val,info,idx=idx)
+    end select
+
+
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine c_jac_solver_csetr
+
+  subroutine c_jac_solver_free(sv,info)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_c_jac_solver_type), intent(inout) :: sv
+    integer(psb_ipk_), intent(out)                :: info
+    integer(psb_ipk_)  :: err_act
+    character(len=20)  :: name='c_jac_solver_free'
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+
+    call sv%a%free()
+    call sv%dv%free(info)
+    if (allocated(sv%d)) deallocate(sv%d)
+
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine c_jac_solver_free
+
+  subroutine c_jac_solver_descr(sv,info,iout,coarse,prefix)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_c_jac_solver_type), intent(in) :: sv
+    integer(psb_ipk_), intent(out)            :: info
+    integer(psb_ipk_), intent(in), optional   :: iout
+    logical, intent(in), optional             :: coarse
+    character(len=*), intent(in), optional    :: prefix
+
+    ! Local variables
+    integer(psb_ipk_)      :: err_act
+    character(len=20), parameter :: name='amg_c_jac_solver_descr'
+    integer(psb_ipk_) :: iout_
+    character(1024)    :: prefix_
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+    if (present(iout)) then 
+      iout_ = iout 
+    else
+      iout_ = psb_out_unit
+    endif
+    if (present(prefix)) then
+      prefix_ = prefix
+    else
+      prefix_ = ""
+    end if
+
+    if (sv%eps<=dzero) then 
+      write(iout_,*) trim(prefix_), '  Jacobi iterative solver with  ',&
+           &  sv%sweeps,' sweeps'
+    else
+      write(iout_,*) trim(prefix_), '  Jacobi iterative solver with  tolerance',&
+           &  sv%eps,' and maxit', sv%sweeps
+    end if
+    
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine c_jac_solver_descr
+
+  function c_jac_solver_get_nzeros(sv) result(val)
+
+    implicit none 
+    ! Arguments
+    class(amg_c_jac_solver_type), intent(in) :: sv
+    integer(psb_epk_) :: val
+    integer(psb_ipk_)        :: i
+    
+    val = 0 
+    val = val + sv%a%get_nzeros()
+    val = val + sv%dv%get_nrows()
+
+    return
+  end function c_jac_solver_get_nzeros
+
+  function c_jac_solver_sizeof(sv) result(val)
+
+    implicit none 
+    ! Arguments
+    class(amg_c_jac_solver_type), intent(in) :: sv
+    integer(psb_epk_) :: val
+    integer(psb_ipk_)        :: i
+
+    val = psb_sizeof_ip 
+    val = val + sv%a%sizeof()
+    val = val + sv%dv%sizeof()
+
+    return
+  end function c_jac_solver_sizeof
+
+  function c_jac_solver_get_fmt() result(val)
+    implicit none 
+    character(len=32)  :: val
+
+    val = "Jacobi solver"
+  end function c_jac_solver_get_fmt
+
+  function c_jac_solver_get_id() result(val)
+    implicit none 
+    integer(psb_ipk_)  :: val
+
+    val = amg_jac_
+  end function c_jac_solver_get_id
+
+  !
+  ! If this is true, then the solver needs a starting
+  ! guess. Currently only handled in JAC smoother. 
+  ! 
+  function c_jac_solver_is_iterative() result(val)
+    implicit none 
+    logical  :: val
+
+    val = .true.
+  end function c_jac_solver_is_iterative
+    
+  function c_jac_solver_get_wrksize() result(val)
+    implicit none 
+    integer(psb_ipk_)  :: val
+
+    val = 2
+  end function c_jac_solver_get_wrksize
+
+  subroutine c_l1_jac_solver_descr(sv,info,iout,coarse,prefix)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_c_l1_jac_solver_type), intent(in) :: sv
+    integer(psb_ipk_), intent(out)            :: info
+    integer(psb_ipk_), intent(in), optional   :: iout
+    logical, intent(in), optional             :: coarse
+    character(len=*), intent(in), optional    :: prefix
+
+    ! Local variables
+    integer(psb_ipk_)      :: err_act
+    character(len=20), parameter :: name='amg_c_l1_jac_solver_descr'
+    integer(psb_ipk_) :: iout_
+    character(1024)    :: prefix_
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+    if (present(iout)) then 
+      iout_ = iout 
+    else
+      iout_ = psb_out_unit
+    endif
+    if (present(prefix)) then
+      prefix_ = prefix
+    else
+      prefix_ = ""
+    end if
+
+    if (sv%eps<=dzero) then 
+      write(iout_,*) trim(prefix_), '  L1-Jacobi iterative solver with  ',&
+           &  sv%sweeps,' sweeps'
+    else
+      write(iout_,*) trim(prefix_), '  L1-Jacobi iterative solver with  tolerance',&
+           &  sv%eps,' and maxit', sv%sweeps
+    end if
+    
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine c_l1_jac_solver_descr
+
+  function c_l1_jac_solver_get_fmt() result(val)
+    implicit none 
+    character(len=32)  :: val
+
+    val = "L1-Jacobi solver"
+  end function c_l1_jac_solver_get_fmt
+
+  function c_l1_jac_solver_get_id() result(val)
+    implicit none 
+    integer(psb_ipk_)  :: val
+
+    val = amg_l1_jac_
+  end function c_l1_jac_solver_get_id
+  
+end module amg_c_jac_solver

amgprec/amg_d_jac_solver.f90

@@ -0,0 +1,582 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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.
+!   
+!  
+!
+!
+! File: amg_d_jac_solver_mod.f90
+!
+! Module: amg_d_jac_solver_mod
+!
+!  This module defines: 
+!  - the amg_d_jac_solver_type data structure containing the ingredients
+!    for a local Jacobi  iteration. The iterations are local to a process
+!    (they operate on the block diagonal).
+!    
+!
+module amg_d_jac_solver
+
+  use amg_d_base_solver_mod
+
+  type, extends(amg_d_base_solver_type) :: amg_d_jac_solver_type
+    type(psb_dspmat_type)      :: a
+    type(psb_d_vect_type), allocatable :: dv
+    real(psb_dpk_), allocatable        :: d(:)
+    integer(psb_ipk_)          :: sweeps
+    real(psb_dpk_)             :: eps
+  contains
+    procedure, pass(sv) :: dump    => amg_d_jac_solver_dmp
+    procedure, pass(sv) :: check   => d_jac_solver_check
+    procedure, pass(sv) :: clone   => amg_d_jac_solver_clone
+    procedure, pass(sv) :: clone_settings => amg_d_jac_solver_clone_settings
+    procedure, pass(sv) :: clear_data     => amg_d_jac_solver_clear_data
+    procedure, pass(sv) :: build   => amg_d_jac_solver_bld
+    procedure, pass(sv) :: cnv     => amg_d_jac_solver_cnv
+    procedure, pass(sv) :: apply_v => amg_d_jac_solver_apply_vect
+    procedure, pass(sv) :: apply_a => amg_d_jac_solver_apply
+    procedure, pass(sv) :: free    => d_jac_solver_free
+    procedure, pass(sv) :: cseti   => d_jac_solver_cseti
+    procedure, pass(sv) :: csetc   => d_jac_solver_csetc
+    procedure, pass(sv) :: csetr   => d_jac_solver_csetr
+    procedure, pass(sv) :: descr   => d_jac_solver_descr
+    procedure, pass(sv) :: default => d_jac_solver_default
+    procedure, pass(sv) :: sizeof  => d_jac_solver_sizeof
+    procedure, pass(sv) :: get_nzeros => d_jac_solver_get_nzeros
+    procedure, nopass   :: get_wrksz  => d_jac_solver_get_wrksize
+    procedure, nopass   :: get_fmt    => d_jac_solver_get_fmt
+    procedure, nopass   :: get_id     => d_jac_solver_get_id
+    procedure, nopass   :: is_iterative => d_jac_solver_is_iterative
+  end type amg_d_jac_solver_type
+
+  type, extends(amg_d_jac_solver_type) :: amg_d_l1_jac_solver_type
+  contains
+    procedure, pass(sv) :: build   => amg_d_l1_jac_solver_bld
+    procedure, pass(sv) :: descr   => d_l1_jac_solver_descr
+    procedure, nopass   :: get_fmt    => d_l1_jac_solver_get_fmt
+    procedure, nopass   :: get_id     => d_l1_jac_solver_get_id
+  end type amg_d_l1_jac_solver_type
+
+
+  private :: d_jac_solver_bld, d_jac_solver_apply, &
+       &  d_jac_solver_free,   &
+       &  d_jac_solver_descr,  d_jac_solver_sizeof, &
+       &  d_jac_solver_default, d_jac_solver_dmp, &
+       &  d_jac_solver_apply_vect, d_jac_solver_get_nzeros, &
+       &  d_jac_solver_get_fmt, d_jac_solver_check,&
+       &  d_jac_solver_is_iterative, &
+       &  d_jac_solver_get_id, d_jac_solver_get_wrksize
+
+  interface 
+    subroutine amg_d_jac_solver_apply_vect(alpha,sv,x,beta,y,desc_data,&
+         & trans,work,wv,info,init,initu)
+      import :: psb_desc_type, amg_d_jac_solver_type, psb_d_vect_type, psb_dpk_, &
+           & psb_dspmat_type, psb_d_base_sparse_mat, psb_d_base_vect_type, psb_ipk_
+      implicit none 
+      type(psb_desc_type), intent(in)             :: desc_data
+      class(amg_d_jac_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_jac_solver_apply_vect
+  end interface
+
+  interface 
+    subroutine amg_d_jac_solver_apply(alpha,sv,x,beta,y,desc_data,trans,work,info,init,initu)
+      import :: psb_desc_type, amg_d_jac_solver_type, psb_d_vect_type, psb_dpk_, &
+           & psb_dspmat_type, psb_d_base_sparse_mat, psb_d_base_vect_type, psb_ipk_
+      implicit none 
+      type(psb_desc_type), intent(in)      :: desc_data
+      class(amg_d_jac_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_jac_solver_apply
+  end interface
+
+  interface 
+    subroutine amg_d_jac_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, amg_d_jac_solver_type, psb_d_vect_type, psb_dpk_, &
+           & psb_dspmat_type, psb_d_base_sparse_mat, psb_d_base_vect_type,&
+           & psb_ipk_, psb_i_base_vect_type
+      implicit none 
+      type(psb_dspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a 
+      class(amg_d_jac_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_jac_solver_bld
+  end interface
+
+  interface 
+    subroutine amg_d_l1_jac_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, amg_d_l1_jac_solver_type, psb_d_vect_type, psb_dpk_, &
+           & psb_dspmat_type, psb_d_base_sparse_mat, psb_d_base_vect_type,&
+           & psb_ipk_, psb_i_base_vect_type
+      implicit none 
+      type(psb_dspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a 
+      class(amg_d_l1_jac_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_l1_jac_solver_bld
+  end interface
+
+  interface 
+    subroutine amg_d_jac_solver_cnv(sv,info,amold,vmold,imold)
+      import :: amg_d_jac_solver_type, psb_dpk_, &
+           & psb_d_base_sparse_mat, psb_d_base_vect_type,&
+           & psb_ipk_, psb_i_base_vect_type
+      implicit none 
+      class(amg_d_jac_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_jac_solver_cnv
+  end interface
+  
+  interface 
+    subroutine amg_d_jac_solver_dmp(sv,desc,level,info,prefix,head,solver,global_num)
+      import :: psb_desc_type, amg_d_jac_solver_type, psb_d_vect_type, psb_dpk_, &
+           & psb_dspmat_type, psb_d_base_sparse_mat, psb_d_base_vect_type, &
+           & psb_ipk_
+      implicit none 
+      class(amg_d_jac_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_jac_solver_dmp
+  end interface
+  
+  interface
+    subroutine amg_d_jac_solver_clone(sv,svout,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_solver_type, amg_d_jac_solver_type, psb_ipk_
+      Implicit None
+      
+      ! Arguments
+      class(amg_d_jac_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_jac_solver_clone
+  end interface
+  
+!!$  interface
+!!$    subroutine amg_d_l1_jac_solver_clone(sv,svout,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_solver_type, amg_d_l1_jac_solver_type, psb_ipk_
+!!$      Implicit None
+!!$      
+!!$      ! Arguments
+!!$      class(amg_d_l1_jac_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_l1_jac_solver_clone
+!!$  end interface
+
+  interface
+    subroutine amg_d_jac_solver_clone_settings(sv,svout,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_solver_type, amg_d_jac_solver_type, psb_ipk_
+      Implicit None
+      
+      ! Arguments
+      class(amg_d_jac_solver_type), intent(inout) :: sv
+      class(amg_d_base_solver_type), intent(inout) :: svout
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_d_jac_solver_clone_settings
+  end interface
+
+  interface
+    subroutine amg_d_jac_solver_clear_data(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_jac_solver_type, psb_ipk_
+      Implicit None
+      
+      ! Arguments
+      class(amg_d_jac_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)                 :: info
+    end subroutine amg_d_jac_solver_clear_data
+  end interface
+
+contains
+
+  subroutine d_jac_solver_default(sv)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_d_jac_solver_type), intent(inout) :: sv
+
+    sv%sweeps = ione
+    sv%eps    = dzero
+    
+    return
+  end subroutine d_jac_solver_default
+
+  subroutine d_jac_solver_check(sv,info)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_d_jac_solver_type), intent(inout) :: sv
+    integer(psb_ipk_), intent(out)                :: info
+    integer(psb_ipk_) :: err_act
+    character(len=20) :: name='d_jac_solver_check'
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+
+    call amg_check_def(sv%sweeps,&
+         & 'Jacobi sweeps',ione,is_int_positive)
+
+    if (info /= psb_success_) goto 9999
+    
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+
+  end subroutine d_jac_solver_check
+
+  subroutine d_jac_solver_cseti(sv,what,val,info,idx)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_d_jac_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_jac_solver_cseti'
+
+    info = psb_success_
+    call psb_erractionsave(err_act)
+
+    select case(psb_toupper(what))
+    case('SOLVER_SWEEPS')
+      sv%sweeps = val      
+    case default
+      call sv%amg_d_base_solver_type%set(what,val,info,idx=idx)
+    end select
+
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine d_jac_solver_cseti
+
+  subroutine d_jac_solver_csetc(sv,what,val,info,idx)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_d_jac_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='d_jac_solver_csetc'
+
+    info = psb_success_
+    call psb_erractionsave(err_act)
+
+
+    call sv%amg_d_base_solver_type%set(what,val,info,idx=idx)
+  
+    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 d_jac_solver_csetc
+  
+  subroutine d_jac_solver_csetr(sv,what,val,info,idx)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_d_jac_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='d_jac_solver_csetr'
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+
+    select case(psb_toupper(what))
+    case('SOLVER_EPS') 
+      sv%eps = val
+    case default
+      call sv%amg_d_base_solver_type%set(what,val,info,idx=idx)
+    end select
+
+
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine d_jac_solver_csetr
+
+  subroutine d_jac_solver_free(sv,info)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_d_jac_solver_type), intent(inout) :: sv
+    integer(psb_ipk_), intent(out)                :: info
+    integer(psb_ipk_)  :: err_act
+    character(len=20)  :: name='d_jac_solver_free'
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+
+    call sv%a%free()
+    call sv%dv%free(info)
+    if (allocated(sv%d)) deallocate(sv%d)
+
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine d_jac_solver_free
+
+  subroutine d_jac_solver_descr(sv,info,iout,coarse,prefix)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_d_jac_solver_type), intent(in) :: sv
+    integer(psb_ipk_), intent(out)            :: info
+    integer(psb_ipk_), intent(in), optional   :: iout
+    logical, intent(in), optional             :: coarse
+    character(len=*), intent(in), optional    :: prefix
+
+    ! Local variables
+    integer(psb_ipk_)      :: err_act
+    character(len=20), parameter :: name='amg_d_jac_solver_descr'
+    integer(psb_ipk_) :: iout_
+    character(1024)    :: prefix_
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+    if (present(iout)) then 
+      iout_ = iout 
+    else
+      iout_ = psb_out_unit
+    endif
+    if (present(prefix)) then
+      prefix_ = prefix
+    else
+      prefix_ = ""
+    end if
+
+    if (sv%eps<=dzero) then 
+      write(iout_,*) trim(prefix_), '  Jacobi iterative solver with  ',&
+           &  sv%sweeps,' sweeps'
+    else
+      write(iout_,*) trim(prefix_), '  Jacobi iterative solver with  tolerance',&
+           &  sv%eps,' and maxit', sv%sweeps
+    end if
+    
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine d_jac_solver_descr
+
+  function d_jac_solver_get_nzeros(sv) result(val)
+
+    implicit none 
+    ! Arguments
+    class(amg_d_jac_solver_type), intent(in) :: sv
+    integer(psb_epk_) :: val
+    integer(psb_ipk_)        :: i
+    
+    val = 0 
+    val = val + sv%a%get_nzeros()
+    val = val + sv%dv%get_nrows()
+
+    return
+  end function d_jac_solver_get_nzeros
+
+  function d_jac_solver_sizeof(sv) result(val)
+
+    implicit none 
+    ! Arguments
+    class(amg_d_jac_solver_type), intent(in) :: sv
+    integer(psb_epk_) :: val
+    integer(psb_ipk_)        :: i
+
+    val = psb_sizeof_ip 
+    val = val + sv%a%sizeof()
+    val = val + sv%dv%sizeof()
+
+    return
+  end function d_jac_solver_sizeof
+
+  function d_jac_solver_get_fmt() result(val)
+    implicit none 
+    character(len=32)  :: val
+
+    val = "Jacobi solver"
+  end function d_jac_solver_get_fmt
+
+  function d_jac_solver_get_id() result(val)
+    implicit none 
+    integer(psb_ipk_)  :: val
+
+    val = amg_jac_
+  end function d_jac_solver_get_id
+
+  !
+  ! If this is true, then the solver needs a starting
+  ! guess. Currently only handled in JAC smoother. 
+  ! 
+  function d_jac_solver_is_iterative() result(val)
+    implicit none 
+    logical  :: val
+
+    val = .true.
+  end function d_jac_solver_is_iterative
+    
+  function d_jac_solver_get_wrksize() result(val)
+    implicit none 
+    integer(psb_ipk_)  :: val
+
+    val = 2
+  end function d_jac_solver_get_wrksize
+
+  subroutine d_l1_jac_solver_descr(sv,info,iout,coarse,prefix)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_d_l1_jac_solver_type), intent(in) :: sv
+    integer(psb_ipk_), intent(out)            :: info
+    integer(psb_ipk_), intent(in), optional   :: iout
+    logical, intent(in), optional             :: coarse
+    character(len=*), intent(in), optional    :: prefix
+
+    ! Local variables
+    integer(psb_ipk_)      :: err_act
+    character(len=20), parameter :: name='amg_d_l1_jac_solver_descr'
+    integer(psb_ipk_) :: iout_
+    character(1024)    :: prefix_
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+    if (present(iout)) then 
+      iout_ = iout 
+    else
+      iout_ = psb_out_unit
+    endif
+    if (present(prefix)) then
+      prefix_ = prefix
+    else
+      prefix_ = ""
+    end if
+
+    if (sv%eps<=dzero) then 
+      write(iout_,*) trim(prefix_), '  L1-Jacobi iterative solver with  ',&
+           &  sv%sweeps,' sweeps'
+    else
+      write(iout_,*) trim(prefix_), '  L1-Jacobi iterative solver with  tolerance',&
+           &  sv%eps,' and maxit', sv%sweeps
+    end if
+    
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine d_l1_jac_solver_descr
+
+  function d_l1_jac_solver_get_fmt() result(val)
+    implicit none 
+    character(len=32)  :: val
+
+    val = "L1-Jacobi solver"
+  end function d_l1_jac_solver_get_fmt
+
+  function d_l1_jac_solver_get_id() result(val)
+    implicit none 
+    integer(psb_ipk_)  :: val
+
+    val = amg_l1_jac_
+  end function d_l1_jac_solver_get_id
+  
+end module amg_d_jac_solver

amgprec/amg_s_jac_solver.f90

@@ -0,0 +1,582 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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.
+!   
+!  
+!
+!
+! File: amg_s_jac_solver_mod.f90
+!
+! Module: amg_s_jac_solver_mod
+!
+!  This module defines: 
+!  - the amg_s_jac_solver_type data structure containing the ingredients
+!    for a local Jacobi  iteration. The iterations are local to a process
+!    (they operate on the block diagonal).
+!    
+!
+module amg_s_jac_solver
+
+  use amg_s_base_solver_mod
+
+  type, extends(amg_s_base_solver_type) :: amg_s_jac_solver_type
+    type(psb_sspmat_type)      :: a
+    type(psb_s_vect_type), allocatable :: dv
+    real(psb_spk_), allocatable        :: d(:)
+    integer(psb_ipk_)          :: sweeps
+    real(psb_spk_)             :: eps
+  contains
+    procedure, pass(sv) :: dump    => amg_s_jac_solver_dmp
+    procedure, pass(sv) :: check   => s_jac_solver_check
+    procedure, pass(sv) :: clone   => amg_s_jac_solver_clone
+    procedure, pass(sv) :: clone_settings => amg_s_jac_solver_clone_settings
+    procedure, pass(sv) :: clear_data     => amg_s_jac_solver_clear_data
+    procedure, pass(sv) :: build   => amg_s_jac_solver_bld
+    procedure, pass(sv) :: cnv     => amg_s_jac_solver_cnv
+    procedure, pass(sv) :: apply_v => amg_s_jac_solver_apply_vect
+    procedure, pass(sv) :: apply_a => amg_s_jac_solver_apply
+    procedure, pass(sv) :: free    => s_jac_solver_free
+    procedure, pass(sv) :: cseti   => s_jac_solver_cseti
+    procedure, pass(sv) :: csetc   => s_jac_solver_csetc
+    procedure, pass(sv) :: csetr   => s_jac_solver_csetr
+    procedure, pass(sv) :: descr   => s_jac_solver_descr
+    procedure, pass(sv) :: default => s_jac_solver_default
+    procedure, pass(sv) :: sizeof  => s_jac_solver_sizeof
+    procedure, pass(sv) :: get_nzeros => s_jac_solver_get_nzeros
+    procedure, nopass   :: get_wrksz  => s_jac_solver_get_wrksize
+    procedure, nopass   :: get_fmt    => s_jac_solver_get_fmt
+    procedure, nopass   :: get_id     => s_jac_solver_get_id
+    procedure, nopass   :: is_iterative => s_jac_solver_is_iterative
+  end type amg_s_jac_solver_type
+
+  type, extends(amg_s_jac_solver_type) :: amg_s_l1_jac_solver_type
+  contains
+    procedure, pass(sv) :: build   => amg_s_l1_jac_solver_bld
+    procedure, pass(sv) :: descr   => s_l1_jac_solver_descr
+    procedure, nopass   :: get_fmt    => s_l1_jac_solver_get_fmt
+    procedure, nopass   :: get_id     => s_l1_jac_solver_get_id
+  end type amg_s_l1_jac_solver_type
+
+
+  private :: s_jac_solver_bld, s_jac_solver_apply, &
+       &  s_jac_solver_free,   &
+       &  s_jac_solver_descr,  s_jac_solver_sizeof, &
+       &  s_jac_solver_default, s_jac_solver_dmp, &
+       &  s_jac_solver_apply_vect, s_jac_solver_get_nzeros, &
+       &  s_jac_solver_get_fmt, s_jac_solver_check,&
+       &  s_jac_solver_is_iterative, &
+       &  s_jac_solver_get_id, s_jac_solver_get_wrksize
+
+  interface 
+    subroutine amg_s_jac_solver_apply_vect(alpha,sv,x,beta,y,desc_data,&
+         & trans,work,wv,info,init,initu)
+      import :: psb_desc_type, amg_s_jac_solver_type, psb_s_vect_type, psb_spk_, &
+           & psb_sspmat_type, psb_s_base_sparse_mat, psb_s_base_vect_type, psb_ipk_
+      implicit none 
+      type(psb_desc_type), intent(in)             :: desc_data
+      class(amg_s_jac_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_jac_solver_apply_vect
+  end interface
+
+  interface 
+    subroutine amg_s_jac_solver_apply(alpha,sv,x,beta,y,desc_data,trans,work,info,init,initu)
+      import :: psb_desc_type, amg_s_jac_solver_type, psb_s_vect_type, psb_spk_, &
+           & psb_sspmat_type, psb_s_base_sparse_mat, psb_s_base_vect_type, psb_ipk_
+      implicit none 
+      type(psb_desc_type), intent(in)      :: desc_data
+      class(amg_s_jac_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_jac_solver_apply
+  end interface
+
+  interface 
+    subroutine amg_s_jac_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, amg_s_jac_solver_type, psb_s_vect_type, psb_spk_, &
+           & psb_sspmat_type, psb_s_base_sparse_mat, psb_s_base_vect_type,&
+           & psb_ipk_, psb_i_base_vect_type
+      implicit none 
+      type(psb_sspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a 
+      class(amg_s_jac_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_jac_solver_bld
+  end interface
+
+  interface 
+    subroutine amg_s_l1_jac_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, amg_s_l1_jac_solver_type, psb_s_vect_type, psb_spk_, &
+           & psb_sspmat_type, psb_s_base_sparse_mat, psb_s_base_vect_type,&
+           & psb_ipk_, psb_i_base_vect_type
+      implicit none 
+      type(psb_sspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a 
+      class(amg_s_l1_jac_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_l1_jac_solver_bld
+  end interface
+
+  interface 
+    subroutine amg_s_jac_solver_cnv(sv,info,amold,vmold,imold)
+      import :: amg_s_jac_solver_type, psb_spk_, &
+           & psb_s_base_sparse_mat, psb_s_base_vect_type,&
+           & psb_ipk_, psb_i_base_vect_type
+      implicit none 
+      class(amg_s_jac_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_jac_solver_cnv
+  end interface
+  
+  interface 
+    subroutine amg_s_jac_solver_dmp(sv,desc,level,info,prefix,head,solver,global_num)
+      import :: psb_desc_type, amg_s_jac_solver_type, psb_s_vect_type, psb_spk_, &
+           & psb_sspmat_type, psb_s_base_sparse_mat, psb_s_base_vect_type, &
+           & psb_ipk_
+      implicit none 
+      class(amg_s_jac_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_jac_solver_dmp
+  end interface
+  
+  interface
+    subroutine amg_s_jac_solver_clone(sv,svout,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_solver_type, amg_s_jac_solver_type, psb_ipk_
+      Implicit None
+      
+      ! Arguments
+      class(amg_s_jac_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_jac_solver_clone
+  end interface
+  
+!!$  interface
+!!$    subroutine amg_s_l1_jac_solver_clone(sv,svout,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_solver_type, amg_s_l1_jac_solver_type, psb_ipk_
+!!$      Implicit None
+!!$      
+!!$      ! Arguments
+!!$      class(amg_s_l1_jac_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_l1_jac_solver_clone
+!!$  end interface
+
+  interface
+    subroutine amg_s_jac_solver_clone_settings(sv,svout,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_solver_type, amg_s_jac_solver_type, psb_ipk_
+      Implicit None
+      
+      ! Arguments
+      class(amg_s_jac_solver_type), intent(inout) :: sv
+      class(amg_s_base_solver_type), intent(inout) :: svout
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_s_jac_solver_clone_settings
+  end interface
+
+  interface
+    subroutine amg_s_jac_solver_clear_data(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_jac_solver_type, psb_ipk_
+      Implicit None
+      
+      ! Arguments
+      class(amg_s_jac_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)                 :: info
+    end subroutine amg_s_jac_solver_clear_data
+  end interface
+
+contains
+
+  subroutine s_jac_solver_default(sv)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_s_jac_solver_type), intent(inout) :: sv
+
+    sv%sweeps = ione
+    sv%eps    = dzero
+    
+    return
+  end subroutine s_jac_solver_default
+
+  subroutine s_jac_solver_check(sv,info)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_s_jac_solver_type), intent(inout) :: sv
+    integer(psb_ipk_), intent(out)                :: info
+    integer(psb_ipk_) :: err_act
+    character(len=20) :: name='s_jac_solver_check'
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+
+    call amg_check_def(sv%sweeps,&
+         & 'Jacobi sweeps',ione,is_int_positive)
+
+    if (info /= psb_success_) goto 9999
+    
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+
+  end subroutine s_jac_solver_check
+
+  subroutine s_jac_solver_cseti(sv,what,val,info,idx)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_s_jac_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='s_jac_solver_cseti'
+
+    info = psb_success_
+    call psb_erractionsave(err_act)
+
+    select case(psb_toupper(what))
+    case('SOLVER_SWEEPS')
+      sv%sweeps = val      
+    case default
+      call sv%amg_s_base_solver_type%set(what,val,info,idx=idx)
+    end select
+
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine s_jac_solver_cseti
+
+  subroutine s_jac_solver_csetc(sv,what,val,info,idx)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_s_jac_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='s_jac_solver_csetc'
+
+    info = psb_success_
+    call psb_erractionsave(err_act)
+
+
+    call sv%amg_s_base_solver_type%set(what,val,info,idx=idx)
+  
+    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 s_jac_solver_csetc
+  
+  subroutine s_jac_solver_csetr(sv,what,val,info,idx)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_s_jac_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='s_jac_solver_csetr'
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+
+    select case(psb_toupper(what))
+    case('SOLVER_EPS') 
+      sv%eps = val
+    case default
+      call sv%amg_s_base_solver_type%set(what,val,info,idx=idx)
+    end select
+
+
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine s_jac_solver_csetr
+
+  subroutine s_jac_solver_free(sv,info)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_s_jac_solver_type), intent(inout) :: sv
+    integer(psb_ipk_), intent(out)                :: info
+    integer(psb_ipk_)  :: err_act
+    character(len=20)  :: name='s_jac_solver_free'
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+
+    call sv%a%free()
+    call sv%dv%free(info)
+    if (allocated(sv%d)) deallocate(sv%d)
+
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine s_jac_solver_free
+
+  subroutine s_jac_solver_descr(sv,info,iout,coarse,prefix)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_s_jac_solver_type), intent(in) :: sv
+    integer(psb_ipk_), intent(out)            :: info
+    integer(psb_ipk_), intent(in), optional   :: iout
+    logical, intent(in), optional             :: coarse
+    character(len=*), intent(in), optional    :: prefix
+
+    ! Local variables
+    integer(psb_ipk_)      :: err_act
+    character(len=20), parameter :: name='amg_s_jac_solver_descr'
+    integer(psb_ipk_) :: iout_
+    character(1024)    :: prefix_
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+    if (present(iout)) then 
+      iout_ = iout 
+    else
+      iout_ = psb_out_unit
+    endif
+    if (present(prefix)) then
+      prefix_ = prefix
+    else
+      prefix_ = ""
+    end if
+
+    if (sv%eps<=dzero) then 
+      write(iout_,*) trim(prefix_), '  Jacobi iterative solver with  ',&
+           &  sv%sweeps,' sweeps'
+    else
+      write(iout_,*) trim(prefix_), '  Jacobi iterative solver with  tolerance',&
+           &  sv%eps,' and maxit', sv%sweeps
+    end if
+    
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine s_jac_solver_descr
+
+  function s_jac_solver_get_nzeros(sv) result(val)
+
+    implicit none 
+    ! Arguments
+    class(amg_s_jac_solver_type), intent(in) :: sv
+    integer(psb_epk_) :: val
+    integer(psb_ipk_)        :: i
+    
+    val = 0 
+    val = val + sv%a%get_nzeros()
+    val = val + sv%dv%get_nrows()
+
+    return
+  end function s_jac_solver_get_nzeros
+
+  function s_jac_solver_sizeof(sv) result(val)
+
+    implicit none 
+    ! Arguments
+    class(amg_s_jac_solver_type), intent(in) :: sv
+    integer(psb_epk_) :: val
+    integer(psb_ipk_)        :: i
+
+    val = psb_sizeof_ip 
+    val = val + sv%a%sizeof()
+    val = val + sv%dv%sizeof()
+
+    return
+  end function s_jac_solver_sizeof
+
+  function s_jac_solver_get_fmt() result(val)
+    implicit none 
+    character(len=32)  :: val
+
+    val = "Jacobi solver"
+  end function s_jac_solver_get_fmt
+
+  function s_jac_solver_get_id() result(val)
+    implicit none 
+    integer(psb_ipk_)  :: val
+
+    val = amg_jac_
+  end function s_jac_solver_get_id
+
+  !
+  ! If this is true, then the solver needs a starting
+  ! guess. Currently only handled in JAC smoother. 
+  ! 
+  function s_jac_solver_is_iterative() result(val)
+    implicit none 
+    logical  :: val
+
+    val = .true.
+  end function s_jac_solver_is_iterative
+    
+  function s_jac_solver_get_wrksize() result(val)
+    implicit none 
+    integer(psb_ipk_)  :: val
+
+    val = 2
+  end function s_jac_solver_get_wrksize
+
+  subroutine s_l1_jac_solver_descr(sv,info,iout,coarse,prefix)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_s_l1_jac_solver_type), intent(in) :: sv
+    integer(psb_ipk_), intent(out)            :: info
+    integer(psb_ipk_), intent(in), optional   :: iout
+    logical, intent(in), optional             :: coarse
+    character(len=*), intent(in), optional    :: prefix
+
+    ! Local variables
+    integer(psb_ipk_)      :: err_act
+    character(len=20), parameter :: name='amg_s_l1_jac_solver_descr'
+    integer(psb_ipk_) :: iout_
+    character(1024)    :: prefix_
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+    if (present(iout)) then 
+      iout_ = iout 
+    else
+      iout_ = psb_out_unit
+    endif
+    if (present(prefix)) then
+      prefix_ = prefix
+    else
+      prefix_ = ""
+    end if
+
+    if (sv%eps<=dzero) then 
+      write(iout_,*) trim(prefix_), '  L1-Jacobi iterative solver with  ',&
+           &  sv%sweeps,' sweeps'
+    else
+      write(iout_,*) trim(prefix_), '  L1-Jacobi iterative solver with  tolerance',&
+           &  sv%eps,' and maxit', sv%sweeps
+    end if
+    
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine s_l1_jac_solver_descr
+
+  function s_l1_jac_solver_get_fmt() result(val)
+    implicit none 
+    character(len=32)  :: val
+
+    val = "L1-Jacobi solver"
+  end function s_l1_jac_solver_get_fmt
+
+  function s_l1_jac_solver_get_id() result(val)
+    implicit none 
+    integer(psb_ipk_)  :: val
+
+    val = amg_l1_jac_
+  end function s_l1_jac_solver_get_id
+  
+end module amg_s_jac_solver

amgprec/amg_z_jac_solver.f90

@@ -0,0 +1,582 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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.
+!   
+!  
+!
+!
+! File: amg_z_jac_solver_mod.f90
+!
+! Module: amg_z_jac_solver_mod
+!
+!  This module defines: 
+!  - the amg_z_jac_solver_type data structure containing the ingredients
+!    for a local Jacobi  iteration. The iterations are local to a process
+!    (they operate on the block diagonal).
+!    
+!
+module amg_z_jac_solver
+
+  use amg_z_base_solver_mod
+
+  type, extends(amg_z_base_solver_type) :: amg_z_jac_solver_type
+    type(psb_zspmat_type)      :: a
+    type(psb_z_vect_type), allocatable :: dv
+    complex(psb_dpk_), allocatable        :: d(:)
+    integer(psb_ipk_)          :: sweeps
+    real(psb_dpk_)             :: eps
+  contains
+    procedure, pass(sv) :: dump    => amg_z_jac_solver_dmp
+    procedure, pass(sv) :: check   => z_jac_solver_check
+    procedure, pass(sv) :: clone   => amg_z_jac_solver_clone
+    procedure, pass(sv) :: clone_settings => amg_z_jac_solver_clone_settings
+    procedure, pass(sv) :: clear_data     => amg_z_jac_solver_clear_data
+    procedure, pass(sv) :: build   => amg_z_jac_solver_bld
+    procedure, pass(sv) :: cnv     => amg_z_jac_solver_cnv
+    procedure, pass(sv) :: apply_v => amg_z_jac_solver_apply_vect
+    procedure, pass(sv) :: apply_a => amg_z_jac_solver_apply
+    procedure, pass(sv) :: free    => z_jac_solver_free
+    procedure, pass(sv) :: cseti   => z_jac_solver_cseti
+    procedure, pass(sv) :: csetc   => z_jac_solver_csetc
+    procedure, pass(sv) :: csetr   => z_jac_solver_csetr
+    procedure, pass(sv) :: descr   => z_jac_solver_descr
+    procedure, pass(sv) :: default => z_jac_solver_default
+    procedure, pass(sv) :: sizeof  => z_jac_solver_sizeof
+    procedure, pass(sv) :: get_nzeros => z_jac_solver_get_nzeros
+    procedure, nopass   :: get_wrksz  => z_jac_solver_get_wrksize
+    procedure, nopass   :: get_fmt    => z_jac_solver_get_fmt
+    procedure, nopass   :: get_id     => z_jac_solver_get_id
+    procedure, nopass   :: is_iterative => z_jac_solver_is_iterative
+  end type amg_z_jac_solver_type
+
+  type, extends(amg_z_jac_solver_type) :: amg_z_l1_jac_solver_type
+  contains
+    procedure, pass(sv) :: build   => amg_z_l1_jac_solver_bld
+    procedure, pass(sv) :: descr   => z_l1_jac_solver_descr
+    procedure, nopass   :: get_fmt    => z_l1_jac_solver_get_fmt
+    procedure, nopass   :: get_id     => z_l1_jac_solver_get_id
+  end type amg_z_l1_jac_solver_type
+
+
+  private :: z_jac_solver_bld, z_jac_solver_apply, &
+       &  z_jac_solver_free,   &
+       &  z_jac_solver_descr,  z_jac_solver_sizeof, &
+       &  z_jac_solver_default, z_jac_solver_dmp, &
+       &  z_jac_solver_apply_vect, z_jac_solver_get_nzeros, &
+       &  z_jac_solver_get_fmt, z_jac_solver_check,&
+       &  z_jac_solver_is_iterative, &
+       &  z_jac_solver_get_id, z_jac_solver_get_wrksize
+
+  interface 
+    subroutine amg_z_jac_solver_apply_vect(alpha,sv,x,beta,y,desc_data,&
+         & trans,work,wv,info,init,initu)
+      import :: psb_desc_type, amg_z_jac_solver_type, psb_z_vect_type, psb_dpk_, &
+           & psb_zspmat_type, psb_z_base_sparse_mat, psb_z_base_vect_type, psb_ipk_
+      implicit none 
+      type(psb_desc_type), intent(in)             :: desc_data
+      class(amg_z_jac_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_jac_solver_apply_vect
+  end interface
+
+  interface 
+    subroutine amg_z_jac_solver_apply(alpha,sv,x,beta,y,desc_data,trans,work,info,init,initu)
+      import :: psb_desc_type, amg_z_jac_solver_type, psb_z_vect_type, psb_dpk_, &
+           & psb_zspmat_type, psb_z_base_sparse_mat, psb_z_base_vect_type, psb_ipk_
+      implicit none 
+      type(psb_desc_type), intent(in)      :: desc_data
+      class(amg_z_jac_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_jac_solver_apply
+  end interface
+
+  interface 
+    subroutine amg_z_jac_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, amg_z_jac_solver_type, psb_z_vect_type, psb_dpk_, &
+           & psb_zspmat_type, psb_z_base_sparse_mat, psb_z_base_vect_type,&
+           & psb_ipk_, psb_i_base_vect_type
+      implicit none 
+      type(psb_zspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a 
+      class(amg_z_jac_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_jac_solver_bld
+  end interface
+
+  interface 
+    subroutine amg_z_l1_jac_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+      import :: psb_desc_type, amg_z_l1_jac_solver_type, psb_z_vect_type, psb_dpk_, &
+           & psb_zspmat_type, psb_z_base_sparse_mat, psb_z_base_vect_type,&
+           & psb_ipk_, psb_i_base_vect_type
+      implicit none 
+      type(psb_zspmat_type), intent(in), target           :: a
+      Type(psb_desc_type), Intent(inout)                  :: desc_a 
+      class(amg_z_l1_jac_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_l1_jac_solver_bld
+  end interface
+
+  interface 
+    subroutine amg_z_jac_solver_cnv(sv,info,amold,vmold,imold)
+      import :: amg_z_jac_solver_type, psb_dpk_, &
+           & psb_z_base_sparse_mat, psb_z_base_vect_type,&
+           & psb_ipk_, psb_i_base_vect_type
+      implicit none 
+      class(amg_z_jac_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_jac_solver_cnv
+  end interface
+  
+  interface 
+    subroutine amg_z_jac_solver_dmp(sv,desc,level,info,prefix,head,solver,global_num)
+      import :: psb_desc_type, amg_z_jac_solver_type, psb_z_vect_type, psb_dpk_, &
+           & psb_zspmat_type, psb_z_base_sparse_mat, psb_z_base_vect_type, &
+           & psb_ipk_
+      implicit none 
+      class(amg_z_jac_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_jac_solver_dmp
+  end interface
+  
+  interface
+    subroutine amg_z_jac_solver_clone(sv,svout,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_solver_type, amg_z_jac_solver_type, psb_ipk_
+      Implicit None
+      
+      ! Arguments
+      class(amg_z_jac_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_jac_solver_clone
+  end interface
+  
+!!$  interface
+!!$    subroutine amg_z_l1_jac_solver_clone(sv,svout,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_solver_type, amg_z_l1_jac_solver_type, psb_ipk_
+!!$      Implicit None
+!!$      
+!!$      ! Arguments
+!!$      class(amg_z_l1_jac_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_l1_jac_solver_clone
+!!$  end interface
+
+  interface
+    subroutine amg_z_jac_solver_clone_settings(sv,svout,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_solver_type, amg_z_jac_solver_type, psb_ipk_
+      Implicit None
+      
+      ! Arguments
+      class(amg_z_jac_solver_type), intent(inout) :: sv
+      class(amg_z_base_solver_type), intent(inout) :: svout
+      integer(psb_ipk_), intent(out)               :: info
+    end subroutine amg_z_jac_solver_clone_settings
+  end interface
+
+  interface
+    subroutine amg_z_jac_solver_clear_data(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_jac_solver_type, psb_ipk_
+      Implicit None
+      
+      ! Arguments
+      class(amg_z_jac_solver_type), intent(inout) :: sv
+      integer(psb_ipk_), intent(out)                 :: info
+    end subroutine amg_z_jac_solver_clear_data
+  end interface
+
+contains
+
+  subroutine z_jac_solver_default(sv)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_z_jac_solver_type), intent(inout) :: sv
+
+    sv%sweeps = ione
+    sv%eps    = dzero
+    
+    return
+  end subroutine z_jac_solver_default
+
+  subroutine z_jac_solver_check(sv,info)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_z_jac_solver_type), intent(inout) :: sv
+    integer(psb_ipk_), intent(out)                :: info
+    integer(psb_ipk_) :: err_act
+    character(len=20) :: name='z_jac_solver_check'
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+
+    call amg_check_def(sv%sweeps,&
+         & 'Jacobi sweeps',ione,is_int_positive)
+
+    if (info /= psb_success_) goto 9999
+    
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+
+  end subroutine z_jac_solver_check
+
+  subroutine z_jac_solver_cseti(sv,what,val,info,idx)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_z_jac_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='z_jac_solver_cseti'
+
+    info = psb_success_
+    call psb_erractionsave(err_act)
+
+    select case(psb_toupper(what))
+    case('SOLVER_SWEEPS')
+      sv%sweeps = val      
+    case default
+      call sv%amg_z_base_solver_type%set(what,val,info,idx=idx)
+    end select
+
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine z_jac_solver_cseti
+
+  subroutine z_jac_solver_csetc(sv,what,val,info,idx)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_z_jac_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='z_jac_solver_csetc'
+
+    info = psb_success_
+    call psb_erractionsave(err_act)
+
+
+    call sv%amg_z_base_solver_type%set(what,val,info,idx=idx)
+  
+    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 z_jac_solver_csetc
+  
+  subroutine z_jac_solver_csetr(sv,what,val,info,idx)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_z_jac_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='z_jac_solver_csetr'
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+
+    select case(psb_toupper(what))
+    case('SOLVER_EPS') 
+      sv%eps = val
+    case default
+      call sv%amg_z_base_solver_type%set(what,val,info,idx=idx)
+    end select
+
+
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine z_jac_solver_csetr
+
+  subroutine z_jac_solver_free(sv,info)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_z_jac_solver_type), intent(inout) :: sv
+    integer(psb_ipk_), intent(out)                :: info
+    integer(psb_ipk_)  :: err_act
+    character(len=20)  :: name='z_jac_solver_free'
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+
+    call sv%a%free()
+    call sv%dv%free(info)
+    if (allocated(sv%d)) deallocate(sv%d)
+
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine z_jac_solver_free
+
+  subroutine z_jac_solver_descr(sv,info,iout,coarse,prefix)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_z_jac_solver_type), intent(in) :: sv
+    integer(psb_ipk_), intent(out)            :: info
+    integer(psb_ipk_), intent(in), optional   :: iout
+    logical, intent(in), optional             :: coarse
+    character(len=*), intent(in), optional    :: prefix
+
+    ! Local variables
+    integer(psb_ipk_)      :: err_act
+    character(len=20), parameter :: name='amg_z_jac_solver_descr'
+    integer(psb_ipk_) :: iout_
+    character(1024)    :: prefix_
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+    if (present(iout)) then 
+      iout_ = iout 
+    else
+      iout_ = psb_out_unit
+    endif
+    if (present(prefix)) then
+      prefix_ = prefix
+    else
+      prefix_ = ""
+    end if
+
+    if (sv%eps<=dzero) then 
+      write(iout_,*) trim(prefix_), '  Jacobi iterative solver with  ',&
+           &  sv%sweeps,' sweeps'
+    else
+      write(iout_,*) trim(prefix_), '  Jacobi iterative solver with  tolerance',&
+           &  sv%eps,' and maxit', sv%sweeps
+    end if
+    
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine z_jac_solver_descr
+
+  function z_jac_solver_get_nzeros(sv) result(val)
+
+    implicit none 
+    ! Arguments
+    class(amg_z_jac_solver_type), intent(in) :: sv
+    integer(psb_epk_) :: val
+    integer(psb_ipk_)        :: i
+    
+    val = 0 
+    val = val + sv%a%get_nzeros()
+    val = val + sv%dv%get_nrows()
+
+    return
+  end function z_jac_solver_get_nzeros
+
+  function z_jac_solver_sizeof(sv) result(val)
+
+    implicit none 
+    ! Arguments
+    class(amg_z_jac_solver_type), intent(in) :: sv
+    integer(psb_epk_) :: val
+    integer(psb_ipk_)        :: i
+
+    val = psb_sizeof_ip 
+    val = val + sv%a%sizeof()
+    val = val + sv%dv%sizeof()
+
+    return
+  end function z_jac_solver_sizeof
+
+  function z_jac_solver_get_fmt() result(val)
+    implicit none 
+    character(len=32)  :: val
+
+    val = "Jacobi solver"
+  end function z_jac_solver_get_fmt
+
+  function z_jac_solver_get_id() result(val)
+    implicit none 
+    integer(psb_ipk_)  :: val
+
+    val = amg_jac_
+  end function z_jac_solver_get_id
+
+  !
+  ! If this is true, then the solver needs a starting
+  ! guess. Currently only handled in JAC smoother. 
+  ! 
+  function z_jac_solver_is_iterative() result(val)
+    implicit none 
+    logical  :: val
+
+    val = .true.
+  end function z_jac_solver_is_iterative
+    
+  function z_jac_solver_get_wrksize() result(val)
+    implicit none 
+    integer(psb_ipk_)  :: val
+
+    val = 2
+  end function z_jac_solver_get_wrksize
+
+  subroutine z_l1_jac_solver_descr(sv,info,iout,coarse,prefix)
+
+    Implicit None
+
+    ! Arguments
+    class(amg_z_l1_jac_solver_type), intent(in) :: sv
+    integer(psb_ipk_), intent(out)            :: info
+    integer(psb_ipk_), intent(in), optional   :: iout
+    logical, intent(in), optional             :: coarse
+    character(len=*), intent(in), optional    :: prefix
+
+    ! Local variables
+    integer(psb_ipk_)      :: err_act
+    character(len=20), parameter :: name='amg_z_l1_jac_solver_descr'
+    integer(psb_ipk_) :: iout_
+    character(1024)    :: prefix_
+
+    call psb_erractionsave(err_act)
+    info = psb_success_
+    if (present(iout)) then 
+      iout_ = iout 
+    else
+      iout_ = psb_out_unit
+    endif
+    if (present(prefix)) then
+      prefix_ = prefix
+    else
+      prefix_ = ""
+    end if
+
+    if (sv%eps<=dzero) then 
+      write(iout_,*) trim(prefix_), '  L1-Jacobi iterative solver with  ',&
+           &  sv%sweeps,' sweeps'
+    else
+      write(iout_,*) trim(prefix_), '  L1-Jacobi iterative solver with  tolerance',&
+           &  sv%eps,' and maxit', sv%sweeps
+    end if
+    
+    call psb_erractionrestore(err_act)
+    return
+
+9999 call psb_error_handler(err_act)
+    return
+  end subroutine z_l1_jac_solver_descr
+
+  function z_l1_jac_solver_get_fmt() result(val)
+    implicit none 
+    character(len=32)  :: val
+
+    val = "L1-Jacobi solver"
+  end function z_l1_jac_solver_get_fmt
+
+  function z_l1_jac_solver_get_id() result(val)
+    implicit none 
+    integer(psb_ipk_)  :: val
+
+    val = amg_l1_jac_
+  end function z_l1_jac_solver_get_id
+  
+end module amg_z_jac_solver

amgprec/impl/amg_ccprecset.F90

@@ -84,6 +84,7 @@ subroutine amg_ccprecseti(p,what,val,info,ilev,ilmax,pos,idx)
   use amg_c_diag_solver
   use amg_c_l1_diag_solver
   use amg_c_ilu_solver
+  use amg_c_jac_solver
   use amg_c_id_solver
   use amg_c_gs_solver
   use amg_c_ainv_solver
@@ -308,6 +309,7 @@ subroutine amg_ccprecsetc(p,what,string,info,ilev,ilmax,pos,idx)
   use amg_c_diag_solver
   use amg_c_l1_diag_solver
   use amg_c_ilu_solver
+  use amg_c_jac_solver
   use amg_c_id_solver
   use amg_c_gs_solver
   use amg_c_ainv_solver

amgprec/impl/amg_dcprecset.F90

@@ -84,6 +84,7 @@ subroutine amg_dcprecseti(p,what,val,info,ilev,ilmax,pos,idx)
   use amg_d_diag_solver
   use amg_d_l1_diag_solver
   use amg_d_ilu_solver
+  use amg_d_jac_solver
   use amg_d_id_solver
   use amg_d_gs_solver
   use amg_d_ainv_solver
@@ -314,6 +315,7 @@ subroutine amg_dcprecsetc(p,what,string,info,ilev,ilmax,pos,idx)
   use amg_d_diag_solver
   use amg_d_l1_diag_solver
   use amg_d_ilu_solver
+  use amg_d_jac_solver
   use amg_d_id_solver
   use amg_d_gs_solver
   use amg_d_ainv_solver

amgprec/impl/amg_scprecset.F90

@@ -84,6 +84,7 @@ subroutine amg_scprecseti(p,what,val,info,ilev,ilmax,pos,idx)
   use amg_s_diag_solver
   use amg_s_l1_diag_solver
   use amg_s_ilu_solver
+  use amg_s_jac_solver
   use amg_s_id_solver
   use amg_s_gs_solver
   use amg_s_ainv_solver
@@ -308,6 +309,7 @@ subroutine amg_scprecsetc(p,what,string,info,ilev,ilmax,pos,idx)
   use amg_s_diag_solver
   use amg_s_l1_diag_solver
   use amg_s_ilu_solver
+  use amg_s_jac_solver
   use amg_s_id_solver
   use amg_s_gs_solver
   use amg_s_ainv_solver

amgprec/impl/amg_zcprecset.F90

@@ -84,6 +84,7 @@ subroutine amg_zcprecseti(p,what,val,info,ilev,ilmax,pos,idx)
   use amg_z_diag_solver
   use amg_z_l1_diag_solver
   use amg_z_ilu_solver
+  use amg_z_jac_solver
   use amg_z_id_solver
   use amg_z_gs_solver
   use amg_z_ainv_solver
@@ -314,6 +315,7 @@ subroutine amg_zcprecsetc(p,what,string,info,ilev,ilmax,pos,idx)
   use amg_z_diag_solver
   use amg_z_l1_diag_solver
   use amg_z_ilu_solver
+  use amg_z_jac_solver
   use amg_z_id_solver
   use amg_z_gs_solver
   use amg_z_ainv_solver

amgprec/impl/level/amg_c_base_onelev_csetc.F90

@@ -46,6 +46,7 @@ subroutine amg_c_base_onelev_csetc(lv,what,val,info,pos,idx)
   use amg_c_as_smoother
   use amg_c_diag_solver
   use amg_c_l1_diag_solver
+  use amg_c_jac_solver
   use amg_c_ilu_solver
   use amg_c_id_solver
   use amg_c_gs_solver
@@ -78,6 +79,8 @@ subroutine amg_c_base_onelev_csetc(lv,what,val,info,pos,idx)
   type(amg_c_as_smoother_type)     ::  amg_c_as_smoother_mold
   type(amg_c_diag_solver_type)     ::  amg_c_diag_solver_mold
   type(amg_c_l1_diag_solver_type)  ::  amg_c_l1_diag_solver_mold
+  type(amg_c_jac_solver_type)      ::  amg_c_jac_solver_mold
+  type(amg_c_l1_jac_solver_type)   ::  amg_c_l1_jac_solver_mold
   type(amg_c_ilu_solver_type)      ::  amg_c_ilu_solver_mold
   type(amg_c_id_solver_type)       ::  amg_c_id_solver_mold
   type(amg_c_gs_solver_type)       ::  amg_c_gs_solver_mold
@@ -185,11 +188,16 @@ subroutine amg_c_base_onelev_csetc(lv,what,val,info,pos,idx)
     case ('NONE','NOPREC','FACT_NONE')
       call lv%set(amg_c_id_solver_mold,info,pos=pos)
 
-    case ('DIAG','JACOBI')
+    case ('DIAG')
       call lv%set(amg_c_diag_solver_mold,info,pos=pos)
 
-    case ('L1-DIAG','L1-JACOBI')
+    case ('JACOBI')
+      call lv%set(amg_c_jac_solver_mold,info,pos=pos)
+
+    case ('L1-DIAG')
       call lv%set(amg_c_l1_diag_solver_mold,info,pos=pos)
+    case ('L1-JACOBI')
+      call lv%set(amg_c_l1_jac_solver_mold,info,pos=pos)
 
     case ('GS','FGS','FWGS')
       call lv%set(amg_c_gs_solver_mold,info,pos=pos)

amgprec/impl/level/amg_d_base_onelev_csetc.F90

@@ -47,6 +47,7 @@ subroutine amg_d_base_onelev_csetc(lv,what,val,info,pos,idx)
   use amg_d_as_smoother
   use amg_d_diag_solver
   use amg_d_l1_diag_solver
+  use amg_d_jac_solver
   use amg_d_ilu_solver
   use amg_d_id_solver
   use amg_d_gs_solver
@@ -85,6 +86,8 @@ subroutine amg_d_base_onelev_csetc(lv,what,val,info,pos,idx)
   type(amg_d_as_smoother_type)     ::  amg_d_as_smoother_mold
   type(amg_d_diag_solver_type)     ::  amg_d_diag_solver_mold
   type(amg_d_l1_diag_solver_type)  ::  amg_d_l1_diag_solver_mold
+  type(amg_d_jac_solver_type)      ::  amg_d_jac_solver_mold
+  type(amg_d_l1_jac_solver_type)   ::  amg_d_l1_jac_solver_mold
   type(amg_d_ilu_solver_type)      ::  amg_d_ilu_solver_mold
   type(amg_d_id_solver_type)       ::  amg_d_id_solver_mold
   type(amg_d_gs_solver_type)       ::  amg_d_gs_solver_mold
@@ -198,11 +201,16 @@ subroutine amg_d_base_onelev_csetc(lv,what,val,info,pos,idx)
     case ('NONE','NOPREC','FACT_NONE')
       call lv%set(amg_d_id_solver_mold,info,pos=pos)
 
-    case ('DIAG','JACOBI')
+    case ('DIAG')
       call lv%set(amg_d_diag_solver_mold,info,pos=pos)
 
-    case ('L1-DIAG','L1-JACOBI')
+    case ('JACOBI')
+      call lv%set(amg_d_jac_solver_mold,info,pos=pos)
+
+    case ('L1-DIAG')
       call lv%set(amg_d_l1_diag_solver_mold,info,pos=pos)
+    case ('L1-JACOBI')
+      call lv%set(amg_d_l1_jac_solver_mold,info,pos=pos)
 
     case ('GS','FGS','FWGS')
       call lv%set(amg_d_gs_solver_mold,info,pos=pos)

amgprec/impl/level/amg_s_base_onelev_csetc.F90

@@ -47,6 +47,7 @@ subroutine amg_s_base_onelev_csetc(lv,what,val,info,pos,idx)
   use amg_s_as_smoother
   use amg_s_diag_solver
   use amg_s_l1_diag_solver
+  use amg_s_jac_solver
   use amg_s_ilu_solver
   use amg_s_id_solver
   use amg_s_gs_solver
@@ -79,6 +80,8 @@ subroutine amg_s_base_onelev_csetc(lv,what,val,info,pos,idx)
   type(amg_s_as_smoother_type)     ::  amg_s_as_smoother_mold
   type(amg_s_diag_solver_type)     ::  amg_s_diag_solver_mold
   type(amg_s_l1_diag_solver_type)  ::  amg_s_l1_diag_solver_mold
+  type(amg_s_jac_solver_type)      ::  amg_s_jac_solver_mold
+  type(amg_s_l1_jac_solver_type)   ::  amg_s_l1_jac_solver_mold
   type(amg_s_ilu_solver_type)      ::  amg_s_ilu_solver_mold
   type(amg_s_id_solver_type)       ::  amg_s_id_solver_mold
   type(amg_s_gs_solver_type)       ::  amg_s_gs_solver_mold
@@ -186,11 +189,16 @@ subroutine amg_s_base_onelev_csetc(lv,what,val,info,pos,idx)
     case ('NONE','NOPREC','FACT_NONE')
       call lv%set(amg_s_id_solver_mold,info,pos=pos)
 
-    case ('DIAG','JACOBI')
+    case ('DIAG')
       call lv%set(amg_s_diag_solver_mold,info,pos=pos)
 
-    case ('L1-DIAG','L1-JACOBI')
+    case ('JACOBI')
+      call lv%set(amg_s_jac_solver_mold,info,pos=pos)
+
+    case ('L1-DIAG')
       call lv%set(amg_s_l1_diag_solver_mold,info,pos=pos)
+    case ('L1-JACOBI')
+      call lv%set(amg_s_l1_jac_solver_mold,info,pos=pos)
 
     case ('GS','FGS','FWGS')
       call lv%set(amg_s_gs_solver_mold,info,pos=pos)

amgprec/impl/level/amg_z_base_onelev_csetc.F90

@@ -46,6 +46,7 @@ subroutine amg_z_base_onelev_csetc(lv,what,val,info,pos,idx)
   use amg_z_as_smoother
   use amg_z_diag_solver
   use amg_z_l1_diag_solver
+  use amg_z_jac_solver
   use amg_z_ilu_solver
   use amg_z_id_solver
   use amg_z_gs_solver
@@ -84,6 +85,8 @@ subroutine amg_z_base_onelev_csetc(lv,what,val,info,pos,idx)
   type(amg_z_as_smoother_type)     ::  amg_z_as_smoother_mold
   type(amg_z_diag_solver_type)     ::  amg_z_diag_solver_mold
   type(amg_z_l1_diag_solver_type)  ::  amg_z_l1_diag_solver_mold
+  type(amg_z_jac_solver_type)      ::  amg_z_jac_solver_mold
+  type(amg_z_l1_jac_solver_type)   ::  amg_z_l1_jac_solver_mold
   type(amg_z_ilu_solver_type)      ::  amg_z_ilu_solver_mold
   type(amg_z_id_solver_type)       ::  amg_z_id_solver_mold
   type(amg_z_gs_solver_type)       ::  amg_z_gs_solver_mold
@@ -197,11 +200,16 @@ subroutine amg_z_base_onelev_csetc(lv,what,val,info,pos,idx)
     case ('NONE','NOPREC','FACT_NONE')
       call lv%set(amg_z_id_solver_mold,info,pos=pos)
 
-    case ('DIAG','JACOBI')
+    case ('DIAG')
       call lv%set(amg_z_diag_solver_mold,info,pos=pos)
 
-    case ('L1-DIAG','L1-JACOBI')
+    case ('JACOBI')
+      call lv%set(amg_z_jac_solver_mold,info,pos=pos)
+
+    case ('L1-DIAG')
       call lv%set(amg_z_l1_diag_solver_mold,info,pos=pos)
+    case ('L1-JACOBI')
+      call lv%set(amg_z_l1_jac_solver_mold,info,pos=pos)
 
     case ('GS','FGS','FWGS')
       call lv%set(amg_z_gs_solver_mold,info,pos=pos)

amgprec/impl/solver/Makefile

@@ -302,7 +302,43 @@ amg_z_invk_solver_clone.o \
 amg_z_invk_solver_clone_settings.o \
 amg_z_invk_solver_cseti.o \
 amg_z_invk_solver_descr.o \
-amg_z_krm_solver_impl.o 
+amg_z_krm_solver_impl.o \
+amg_c_jac_solver_clone_settings.o \
+amg_c_jac_solver_clear_data.o \
+amg_c_jac_solver_cnv.o \
+amg_c_jac_solver_clone.o \
+amg_c_jac_solver_dmp.o \
+amg_c_jac_solver_apply_vect.o \
+amg_c_jac_solver_apply.o \
+amg_c_jac_solver_bld.o \
+amg_c_l1_jac_solver_bld.o \
+amg_z_jac_solver_clone_settings.o \
+amg_z_jac_solver_clear_data.o \
+amg_z_jac_solver_cnv.o \
+amg_z_jac_solver_clone.o \
+amg_z_jac_solver_dmp.o \
+amg_z_jac_solver_apply_vect.o \
+amg_z_jac_solver_apply.o \
+amg_z_jac_solver_bld.o \
+amg_z_l1_jac_solver_bld.o \
+amg_s_jac_solver_clone_settings.o \
+amg_s_jac_solver_clear_data.o \
+amg_s_jac_solver_cnv.o \
+amg_s_jac_solver_clone.o \
+amg_s_jac_solver_dmp.o \
+amg_s_jac_solver_apply_vect.o \
+amg_s_jac_solver_apply.o \
+amg_s_jac_solver_bld.o \
+amg_s_l1_jac_solver_bld.o \
+amg_d_jac_solver_clone_settings.o \
+amg_d_jac_solver_clear_data.o \
+amg_d_jac_solver_cnv.o \
+amg_d_jac_solver_clone.o \
+amg_d_jac_solver_dmp.o \
+amg_d_jac_solver_apply_vect.o \
+amg_d_jac_solver_apply.o \
+amg_d_jac_solver_bld.o \
+amg_d_l1_jac_solver_bld.o 
 
 LIBNAME=libamg_prec.a
 

amgprec/impl/solver/amg_c_base_ainv_solver_cnv.f90

@@ -47,7 +47,6 @@ subroutine amg_c_base_ainv_solver_cnv(sv,info,amold,vmold,imold)
   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_

amgprec/impl/solver/amg_c_diag_solver_bld.f90

@@ -132,8 +132,7 @@ subroutine amg_c_l1_diag_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
   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(:)
-  complex(psb_spk_), allocatable :: tdb(:)
+  complex(psb_spk_), allocatable :: tdb(:), tx(:), ty(:) 
   type(psb_ctxt_type) :: ctxt
   integer(psb_ipk_)   :: np, me, i, err_act, debug_unit, debug_level
   character(len=20)   :: name='c_l1_diag_solver_bld', ch_err
@@ -151,12 +150,15 @@ subroutine amg_c_l1_diag_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
   n_row  = desc_a%get_local_rows()
   nrow_a = a%get_nrows()
 
+  tx   = a%get_diag(info)
   sv%d = a%arwsum(info)
+  sv%d(:) = sv%d(:) - abs(tx(:)) + tx(:) 
   if (info == psb_success_) call psb_realloc(n_row,sv%d,info)
   if (present(b)) then 
     tdb=b%arwsum(info)
+    ty =b%get_diag(info)
     if (size(tdb)+nrow_a > n_row) call psb_realloc(nrow_a+size(tdb),sv%d,info)
-    if (info == psb_success_) sv%d(nrow_a+1:nrow_a+size(tdb)) = tdb(:)
+    if (info == psb_success_) sv%d(nrow_a+1:nrow_a+size(tdb)) = tdb(:) - abs(ty(:)) + ty(:)
   end if
   if (info /= psb_success_) then 
     call psb_errpush(psb_err_from_subroutine_,name,a_err='arwsum')

amgprec/impl/solver/amg_c_jac_solver_apply.f90

@@ -0,0 +1,352 @@
+!
+!
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!
+!    (C) Copyright 2021
+!
+!        Salvatore Filippone
+!        Pasqua D'Ambra
+!        Daniela di Serafino
+!
+!    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_jac_solver_apply(alpha,sv,x,beta,y,desc_data,trans,&
+     & work,info,init,initu)
+
+  use psb_base_mod
+  use amg_c_diag_solver
+  use psb_base_krylov_conv_mod, only : log_conv
+  use amg_c_jac_solver, amg_protect_name => amg_c_jac_solver_apply
+  implicit none
+  type(psb_desc_type), intent(in)                 :: desc_data
+  class(amg_c_jac_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, sweeps
+  complex(psb_spk_), pointer :: aux(:)
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: np, me, i, err_act
+  character           :: trans_, init_
+  real(psb_dpk_)      :: res, resdenum
+  character(len=20)   :: name='c_jac_solver_apply_v'
+
+  call psb_erractionsave(err_act)
+
+  info = psb_success_
+  ctxt = desc_data%get_context()
+  call psb_info(ctxt,me,np)
+
+
+  if (present(init)) then
+    init_ = psb_toupper(init)
+  else
+    init_='Z'
+  end if
+
+  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
+
+
+  
+  n_row = desc_data%get_local_rows()
+  n_col = desc_data%get_local_cols()
+  sweeps = sv%sweeps
+  if (4*n_col <= size(work)) then
+    aux => work(:)
+  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,izero,izero,izero,izero/),&
+           & a_err='complex(psb_spk_)')
+      goto 9999
+    end if
+  endif
+
+  if (sweeps >= 0) then
+      !
+      ! This means we are dealing with a pure Jacobi smoother/solver.
+      !
+      associate(tx => aux(1:n_col), ty => aux(n_col+1:2*n_col))
+        select case (init_)
+        case('Z')
+
+          call inner_mlt(n_row,cone,sv%dv%v%v,x,czero,ty,trans=trans_)
+
+        case('Y')
+          call psb_geaxpby(cone,x,czero,tx,desc_data,info)
+          call psb_geaxpby(cone,y,czero,ty,desc_data,info)
+          call psb_spmm(-cone,sv%a,ty,cone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          call inner_mlt(n_row,cone,sv%dv%v%v,tx,czero,ty,trans=trans_)
+
+        case('U')
+          if (.not.present(initu)) then
+            call psb_errpush(psb_err_internal_error_,name,&
+                 & a_err='missing initu to smoother_apply')
+            goto 9999
+          end if
+          call psb_geaxpby(cone,x,czero,tx,desc_data,info)
+          call psb_geaxpby(cone,initu,czero,ty,desc_data,info)
+          call psb_spmm(-cone,sv%a,ty,cone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          call inner_mlt(n_row,cone,sv%dv%v%v,tx,czero,ty,trans=trans_)
+
+        case default
+          call psb_errpush(psb_err_internal_error_,name,&
+               & a_err='wrong  init to smoother_apply')
+          goto 9999
+        end select
+
+        do i=1, sweeps-1
+          !
+          ! Compute Y(j+1) =  Y(j)+ D^(-1)*(X-A*Y(j)),
+          !  where is the diagonal and  A the matrix.
+          !
+          call psb_geaxpby(cone,x,czero,tx,desc_data,info)
+          call psb_spmm(-cone,sv%a,ty,cone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          if (info /= psb_success_) exit
+          call inner_mlt(n_row,cone,sv%dv%v%v,tx,cone,ty,trans=trans_)
+          if (info /= psb_success_) exit
+        end do
+
+        if (info == psb_success_) call psb_geaxpby(alpha,ty,beta,y,desc_data,info)
+
+        if (info /= psb_success_) then
+          info=psb_err_internal_error_
+          call psb_errpush(info,name,&
+               & a_err='subsolve with Jacobi sweeps > 1')
+          goto 9999
+        end if
+
+
+      end associate
+
+
+    else
+      
+      info = psb_err_iarg_neg_
+      call psb_errpush(info,name,&
+           & i_err=(/itwo,sweeps,izero,izero,izero/))
+      goto 9999
+      
+    end if
+
+  if (.not.(4*n_col <= size(work))) then
+    deallocate(aux)
+  endif
+
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+contains
+  subroutine inner_mlt(n_row,alpha,d,x,beta,y,trans)
+    implicit none
+    integer(psb_ipk_),intent(in)   :: n_row
+    complex(psb_spk_), intent(inout) :: d(:)
+    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
+
+    integer(psb_ipk_) :: i
+    
+    if (trans_ == 'C') then 
+      if (beta == czero) then 
+
+        if (alpha == czero) then 
+          y(1:n_row) = czero
+        else if (alpha == cone) then 
+          do i=1, n_row
+            y(i) = conjg(d(i)) * x(i)
+          end do
+        else if (alpha == -cone) then 
+          do i=1, n_row
+            y(i) = -conjg(d(i)) * x(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * conjg(d(i)) * x(i)
+          end do
+        end if
+
+      else if (beta == cone) then 
+
+        if (alpha == czero) then 
+          !y(1:n_row) = czero
+        else if (alpha == cone) then 
+          do i=1, n_row
+            y(i) = conjg(d(i)) * x(i) + y(i)
+          end do
+        else if (alpha == -cone) then 
+          do i=1, n_row
+            y(i) = -conjg(d(i)) * x(i)  + y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * conjg(d(i)) * x(i) + y(i)
+          end do
+        end if
+
+      else if (beta == -cone) then 
+
+        if (alpha == czero) then 
+          y(1:n_row) = -y(1:n_row)        
+        else if (alpha == cone) then 
+          do i=1, n_row
+            y(i) = conjg(d(i)) * x(i) - y(i)
+          end do
+        else if (alpha == -cone) then 
+          do i=1, n_row
+            y(i) = -conjg(d(i)) * x(i)  - y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * conjg(d(i)) * x(i) - y(i)
+          end do
+        end if
+
+      else
+
+        if (alpha == czero) then 
+          y(1:n_row) = beta *y(1:n_row)        
+        else if (alpha == cone) then 
+          do i=1, n_row
+            y(i) = conjg(d(i)) * x(i) + beta*y(i)
+          end do
+        else if (alpha == -cone) then 
+          do i=1, n_row
+            y(i) = -conjg(d(i)) * x(i)  + beta*y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * conjg(d(i)) * x(i) + beta*y(i)
+          end do
+        end if
+
+      end if
+
+    else if (trans_ /= 'C') then 
+
+      if (beta == czero) then 
+
+        if (alpha == czero) then 
+          y(1:n_row) = czero
+        else if (alpha == cone) then 
+          do i=1, n_row
+            y(i) = d(i) * x(i)
+          end do
+        else if (alpha == -cone) then 
+          do i=1, n_row
+            y(i) = -d(i) * x(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * d(i) * x(i)
+          end do
+        end if
+
+      else if (beta == cone) then 
+
+        if (alpha == czero) then 
+          !y(1:n_row) = czero
+        else if (alpha == cone) then 
+          do i=1, n_row
+            y(i) = d(i) * x(i) + y(i)
+          end do
+        else if (alpha == -cone) then 
+          do i=1, n_row
+            y(i) = -d(i) * x(i)  + y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * d(i) * x(i) + y(i)
+          end do
+        end if
+
+      else if (beta == -cone) then 
+
+        if (alpha == czero) then 
+          y(1:n_row) = -y(1:n_row)        
+        else if (alpha == cone) then 
+          do i=1, n_row
+            y(i) = d(i) * x(i) - y(i)
+          end do
+        else if (alpha == -cone) then 
+          do i=1, n_row
+            y(i) = -d(i) * x(i)  - y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * d(i) * x(i) - y(i)
+          end do
+        end if
+
+      else
+
+        if (alpha == czero) then 
+          y(1:n_row) = beta *y(1:n_row)        
+        else if (alpha == cone) then 
+          do i=1, n_row
+            y(i) = d(i) * x(i) + beta*y(i)
+          end do
+        else if (alpha == -cone) then 
+          do i=1, n_row
+            y(i) = -d(i) * x(i)  + beta*y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * d(i) * x(i) + beta*y(i)
+          end do
+        end if
+
+      end if
+
+    end if
+
+  end subroutine inner_mlt
+end subroutine amg_c_jac_solver_apply

amgprec/impl/solver/amg_c_jac_solver_apply_vect.f90

@@ -0,0 +1,190 @@
+!
+!
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!
+!    (C) Copyright 2021
+!
+!        Salvatore Filippone
+!        Pasqua D'Ambra
+!        Daniela di Serafino
+!
+!    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_jac_solver_apply_vect(alpha,sv,x,beta,y,desc_data,trans,&
+     & work,wv,info,init,initu)
+
+  use psb_base_mod
+  use amg_c_diag_solver
+  use psb_base_krylov_conv_mod, only : log_conv
+  use amg_c_jac_solver, amg_protect_name => amg_c_jac_solver_apply_vect
+  implicit none
+  type(psb_desc_type), intent(in)                 :: desc_data
+  class(amg_c_jac_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, sweeps
+  type(psb_c_vect_type)  :: tx, ty, r
+  complex(psb_spk_), pointer :: aux(:)
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: np, me, i, err_act
+  character           :: trans_, init_
+  real(psb_dpk_)      :: res, resdenum
+  character(len=20)   :: name='c_jac_solver_apply_v'
+
+  call psb_erractionsave(err_act)
+
+  info = psb_success_
+  ctxt = desc_data%get_context()
+  call psb_info(ctxt,me,np)
+
+
+  if (present(init)) then
+    init_ = psb_toupper(init)
+  else
+    init_='Z'
+  end if
+
+  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
+
+
+  
+  n_row = desc_data%get_local_rows()
+  n_col = desc_data%get_local_cols()
+  sweeps = sv%sweeps
+  if (4*n_col <= size(work)) then
+    aux => work(:)
+  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,izero,izero,izero,izero/),&
+           & a_err='complex(psb_spk_)')
+      goto 9999
+    end if
+  endif
+
+  if (sweeps >= 0) then
+      !
+      ! This means we are dealing with a pure Jacobi smoother/solver.
+      !
+      associate(tx => wv(1), ty => wv(2))
+        select case (init_)
+        case('Z')
+
+          call ty%mlt(cone,sv%dv,x,czero,info,conjgx=trans_)
+
+        case('Y')
+          call psb_geaxpby(cone,x,czero,tx,desc_data,info)
+          call psb_geaxpby(cone,y,czero,ty,desc_data,info)
+          call psb_spmm(-cone,sv%a,ty,cone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          call ty%mlt(cone,sv%dv,tx,czero,info,conjgx=trans_)
+
+        case('U')
+          if (.not.present(initu)) then
+            call psb_errpush(psb_err_internal_error_,name,&
+                 & a_err='missing initu to smoother_apply')
+            goto 9999
+          end if
+          call psb_geaxpby(cone,x,czero,tx,desc_data,info)
+          call psb_geaxpby(cone,initu,czero,ty,desc_data,info)
+          call psb_spmm(-cone,sv%a,ty,cone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          call ty%mlt(cone,sv%dv,tx,czero,info,conjgx=trans_)
+
+        case default
+          call psb_errpush(psb_err_internal_error_,name,&
+               & a_err='wrong  init to smoother_apply')
+          goto 9999
+        end select
+
+        do i=1, sweeps-1
+          !
+          ! Compute Y(j+1) =  Y(j)+ D^(-1)*(X-A*Y(j)),
+          !  where is the diagonal and  A the matrix.
+          !
+          call psb_geaxpby(cone,x,czero,tx,desc_data,info)
+          call psb_spmm(-cone,sv%a,ty,cone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          if (info /= psb_success_) exit
+          call ty%mlt(cone,sv%dv,tx,cone,info,conjgx=trans_)
+          if (info /= psb_success_) exit
+        end do
+
+
+        if (info == psb_success_) call psb_geaxpby(alpha,ty,beta,y,desc_data,info)
+
+        if (info /= psb_success_) then
+          info=psb_err_internal_error_
+          call psb_errpush(info,name,&
+               & a_err='subsolve with Jacobi sweeps > 1')
+          goto 9999
+        end if
+
+
+      end associate
+
+
+    else
+      
+      info = psb_err_iarg_neg_
+      call psb_errpush(info,name,&
+           & i_err=(/itwo,sweeps,izero,izero,izero/))
+      goto 9999
+      
+    end if
+
+  if (.not.(4*n_col <= size(work))) then
+    deallocate(aux)
+  endif
+
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+
+end subroutine amg_c_jac_solver_apply_vect

amgprec/impl/solver/amg_c_jac_solver_bld.f90

@@ -0,0 +1,125 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+  
+  use psb_base_mod
+  use amg_c_jac_solver, amg_protect_name => amg_c_jac_solver_bld
+
+  Implicit None
+
+  ! Arguments
+  type(psb_cspmat_type), intent(in), target           :: a
+  Type(psb_desc_type), Intent(inout)                  :: desc_a 
+  class(amg_c_jac_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(:)
+  complex(psb_spk_), allocatable :: tdb(:)
+  type(psb_c_csr_sparse_mat) :: tcsr
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: np, me, i, err_act, debug_unit, debug_level
+  character(len=20)   :: name='c_jac_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'
+
+
+  n_row  = desc_a%get_local_rows()
+  nrow_a = a%get_nrows()
+  if (present(b)) then
+    info=psb_err_internal_error_
+    call psb_errpush(info,name)
+    goto 9999      
+  end if
+  call a%cp_to(tcsr)
+  call sv%a%mv_from(tcsr)
+  if (present(amold)) call sv%a%cscnv(info,mold=amold)
+  
+  sv%d = a%get_diag(info)
+  if (info == psb_success_) call psb_realloc(n_row,sv%d,info)
+  if (present(b)) then 
+    tdb=b%get_diag(info)
+    if (size(tdb)+nrow_a > n_row) call psb_realloc(nrow_a+size(tdb),sv%d,info)
+    if (info == psb_success_) sv%d(nrow_a+1:nrow_a+size(tdb)) = tdb(:)
+  end if
+  if (info /= psb_success_) then 
+    call psb_errpush(psb_err_from_subroutine_,name,a_err='get_diag')
+    goto 9999      
+  end if
+
+  do i=1,n_row
+    if (sv%d(i) == czero) then 
+      sv%d(i) = cone
+    else
+      sv%d(i) = cone/sv%d(i)
+    end if
+  end do
+  allocate(sv%dv,stat=info) 
+  if (info == psb_success_) then 
+    call sv%dv%bld(sv%d)
+    if (present(vmold)) call sv%dv%cnv(vmold)
+    call sv%dv%sync()
+  else
+    call psb_errpush(psb_err_from_subroutine_,name,& 
+         & a_err='Allocate sv%dv')
+    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_jac_solver_bld
+
+

amgprec/impl/solver/amg_c_jac_solver_clear_data.f90

@@ -0,0 +1,65 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_clear_data(sv,info)
+  
+  use psb_base_mod
+  use amg_c_jac_solver, amg_protect_name => amg_c_jac_solver_clear_data
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_jac_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(out)               :: info
+  ! Local variables
+  integer(psb_ipk_) :: err_act
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+
+  call sv%a%free()
+  call sv%dv%free(info)
+  if ((info==0).and.allocated(sv%d)) deallocate(sv%d,stat=info)
+  if (info /= 0) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+end subroutine amg_c_jac_solver_clear_data

amgprec/impl/solver/amg_c_jac_solver_clone.f90

@@ -0,0 +1,88 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_clone(sv,svout,info)
+  
+  use psb_base_mod
+  use amg_c_jac_solver, amg_protect_name => amg_c_jac_solver_clone
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_jac_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(svout, mold=sv, stat=info)
+  if (info /= 0) then 
+    info = psb_err_alloc_dealloc_
+    goto 9999 
+  end if
+
+  select type(svo => svout)
+  class is (amg_c_jac_solver_type)
+    svo%sweeps = sv%sweeps
+    svo%eps    = sv%eps
+    if (info == psb_success_) &
+         & call sv%a%clone(svo%a,info)
+    if (info == psb_success_) &
+         & call sv%dv%clone(svo%dv,info)
+    svo%d = sv%d
+    
+  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_jac_solver_clone

amgprec/impl/solver/amg_c_jac_solver_clone_settings.f90

@@ -0,0 +1,69 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_clone_settings(sv,svout,info)
+  
+  use psb_base_mod
+  use amg_c_jac_solver, amg_protect_name =>  amg_c_jac_solver_clone_settings
+  Implicit None
+  ! Arguments
+  class(amg_c_jac_solver_type), intent(inout) :: sv
+  class(amg_c_base_solver_type), intent(inout) :: svout
+  integer(psb_ipk_), intent(out)                 :: info
+  integer(psb_ipk_)  :: err_act
+  character(len=20) :: name='c_jac_solver_clone_settings'
+
+  call psb_erractionsave(err_act)
+
+  select type(svout)
+  class is(amg_c_jac_solver_type)
+    svout%sweeps = sv%sweeps
+    svout%eps    = sv%eps
+    
+  class default    
+    info = psb_err_internal_error_
+    call psb_errpush(info,name)
+    goto 9999 
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+end subroutine amg_c_jac_solver_clone_settings

amgprec/impl/solver/amg_c_jac_solver_cnv.f90

@@ -0,0 +1,72 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_cnv(sv,info,amold,vmold,imold)
+
+  use psb_base_mod
+  use amg_c_jac_solver, amg_protect_name => amg_c_jac_solver_cnv
+
+  Implicit None
+
+  ! Arguments
+  class(amg_c_jac_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 variables
+  integer(psb_ipk_) :: err_act, debug_unit, debug_level
+  character(len=20) :: name='c_jac_solver_cnv', ch_err
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+  debug_unit  = psb_get_debug_unit()
+  debug_level = psb_get_debug_level()
+
+  if (present(amold)) call sv%a%cscnv(info,mold=amold)
+  if ((info==0).and.present(vmold)) call sv%dv%cnv(mold=vmold)
+
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) trim(name),' end'
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+end subroutine amg_c_jac_solver_cnv

amgprec/impl/solver/amg_c_jac_solver_dmp.f90

@@ -0,0 +1,107 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_dmp(sv,desc,level,info,prefix,head,solver,global_num)
+
+  use psb_base_mod
+  use amg_c_jac_solver, amg_protect_name => amg_c_jac_solver_dmp
+  implicit none 
+  class(amg_c_jac_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
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: iam, np
+  character(len=80)   :: prefix_
+  character(len=120)  :: fname ! len should be at least 20 more than
+  logical :: solver_, global_num_
+  integer(psb_lpk_), allocatable :: iv(:)
+  !  len of prefix_ 
+
+  info = 0
+
+  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
+
+
+  if (solver_) then 
+    if (present(prefix)) then 
+      prefix_ = trim(prefix(1:min(len(prefix),len(prefix_))))
+    else
+      prefix_ = "dump_slv_c"
+    end if
+    lname = len_trim(prefix_)
+    fname = trim(prefix_)
+    write(fname(lname+1:lname+5),'(a,i3.3)') '_p',iam
+    lname = lname + 5
+    
+    if (global_num_) then
+      iv = desc%get_global_indices(owned=.false.)      
+
+      write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_nd.mtx'
+      if (sv%a%is_asb()) &
+           & call sv%a%print(fname,head=head,iv=iv)
+      write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_diag.mtx'
+      if (allocated(sv%dv)) &
+           & call psb_geprt(fname,sv%dv%v%v,head=head)
+      
+    else
+
+      write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_nd.mtx'
+      if (sv%a%is_asb()) &
+           & call sv%a%print(fname,head=head)
+      write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_diag.mtx'
+      if (allocated(sv%dv)) &
+           & call psb_geprt(fname,sv%dv%v%v,head=head)
+    end if
+  end if
+
+end subroutine amg_c_jac_solver_dmp

amgprec/impl/solver/amg_c_l1_jac_solver_bld.f90

@@ -0,0 +1,128 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_l1_jac_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+  
+  use psb_base_mod
+  use amg_c_jac_solver, amg_protect_name => amg_c_l1_jac_solver_bld
+
+  Implicit None
+
+  ! Arguments
+  type(psb_cspmat_type), intent(in), target           :: a
+  Type(psb_desc_type), Intent(inout)                  :: desc_a 
+  class(amg_c_l1_jac_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_), allocatable :: tdb(:), tx(:),ty(:)
+  type(psb_c_csr_sparse_mat) :: tcsr
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: np, me, i, err_act, debug_unit, debug_level
+  character(len=20)   :: name='c_l1_jac_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'
+
+
+  n_row  = desc_a%get_local_rows()
+  nrow_a = a%get_nrows()
+  if (present(b)) then
+    info=psb_err_internal_error_
+    call psb_errpush(info,name)
+    goto 9999      
+  end if
+    
+  call a%cp_to(tcsr)
+  call sv%a%mv_from(tcsr)
+  if (present(amold)) call sv%a%cscnv(info,mold=amold)
+  
+  tx   = a%get_diag(info)
+  sv%d = a%arwsum(info)
+  sv%d(:) = sv%d(:) - abs(tx(:)) + tx(:) 
+  if (info == psb_success_) call psb_realloc(n_row,sv%d,info)
+  if (present(b)) then 
+    tdb=b%arwsum(info)
+    ty =b%get_diag(info)
+    if (size(tdb)+nrow_a > n_row) call psb_realloc(nrow_a+size(tdb),sv%d,info)
+    if (info == psb_success_) sv%d(nrow_a+1:nrow_a+size(tdb)) = tdb(:) - abs(ty(:)) + ty(:)
+  end if
+  if (info /= psb_success_) then 
+    call psb_errpush(psb_err_from_subroutine_,name,a_err='get_diag')
+    goto 9999      
+  end if
+
+  do i=1,n_row
+    if (sv%d(i) == czero) then 
+      sv%d(i) = cone
+    else
+      sv%d(i) = cone/sv%d(i)
+    end if
+  end do
+  allocate(sv%dv,stat=info) 
+  if (info == psb_success_) then 
+    call sv%dv%bld(sv%d)
+    if (present(vmold)) call sv%dv%cnv(vmold)
+    call sv%dv%sync()
+  else
+    call psb_errpush(psb_err_from_subroutine_,name,& 
+         & a_err='Allocate sv%dv')
+    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_l1_jac_solver_bld
+
+

amgprec/impl/solver/amg_d_base_ainv_solver_cnv.f90

@@ -47,7 +47,6 @@ subroutine amg_d_base_ainv_solver_cnv(sv,info,amold,vmold,imold)
   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_

amgprec/impl/solver/amg_d_diag_solver_bld.f90

@@ -132,8 +132,7 @@ subroutine amg_d_l1_diag_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
   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(:)
-  real(psb_dpk_), allocatable :: tdb(:)
+  real(psb_dpk_), allocatable :: tdb(:), tx(:), ty(:) 
   type(psb_ctxt_type) :: ctxt
   integer(psb_ipk_)   :: np, me, i, err_act, debug_unit, debug_level
   character(len=20)   :: name='d_l1_diag_solver_bld', ch_err
@@ -151,12 +150,15 @@ subroutine amg_d_l1_diag_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
   n_row  = desc_a%get_local_rows()
   nrow_a = a%get_nrows()
 
+  tx   = a%get_diag(info)
   sv%d = a%arwsum(info)
+  sv%d(:) = sv%d(:) - abs(tx(:)) + tx(:) 
   if (info == psb_success_) call psb_realloc(n_row,sv%d,info)
   if (present(b)) then 
     tdb=b%arwsum(info)
+    ty =b%get_diag(info)
     if (size(tdb)+nrow_a > n_row) call psb_realloc(nrow_a+size(tdb),sv%d,info)
-    if (info == psb_success_) sv%d(nrow_a+1:nrow_a+size(tdb)) = tdb(:)
+    if (info == psb_success_) sv%d(nrow_a+1:nrow_a+size(tdb)) = tdb(:) - abs(ty(:)) + ty(:)
   end if
   if (info /= psb_success_) then 
     call psb_errpush(psb_err_from_subroutine_,name,a_err='arwsum')

amgprec/impl/solver/amg_d_jac_solver_apply.f90

@@ -0,0 +1,352 @@
+!
+!
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!
+!    (C) Copyright 2021
+!
+!        Salvatore Filippone
+!        Pasqua D'Ambra
+!        Daniela di Serafino
+!
+!    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_jac_solver_apply(alpha,sv,x,beta,y,desc_data,trans,&
+     & work,info,init,initu)
+
+  use psb_base_mod
+  use amg_d_diag_solver
+  use psb_base_krylov_conv_mod, only : log_conv
+  use amg_d_jac_solver, amg_protect_name => amg_d_jac_solver_apply
+  implicit none
+  type(psb_desc_type), intent(in)                 :: desc_data
+  class(amg_d_jac_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, sweeps
+  real(psb_dpk_), pointer :: aux(:)
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: np, me, i, err_act
+  character           :: trans_, init_
+  real(psb_dpk_)      :: res, resdenum
+  character(len=20)   :: name='d_jac_solver_apply_v'
+
+  call psb_erractionsave(err_act)
+
+  info = psb_success_
+  ctxt = desc_data%get_context()
+  call psb_info(ctxt,me,np)
+
+
+  if (present(init)) then
+    init_ = psb_toupper(init)
+  else
+    init_='Z'
+  end if
+
+  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
+
+
+  
+  n_row = desc_data%get_local_rows()
+  n_col = desc_data%get_local_cols()
+  sweeps = sv%sweeps
+  if (4*n_col <= size(work)) then
+    aux => work(:)
+  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,izero,izero,izero,izero/),&
+           & a_err='real(psb_dpk_)')
+      goto 9999
+    end if
+  endif
+
+  if (sweeps >= 0) then
+      !
+      ! This means we are dealing with a pure Jacobi smoother/solver.
+      !
+      associate(tx => aux(1:n_col), ty => aux(n_col+1:2*n_col))
+        select case (init_)
+        case('Z')
+
+          call inner_mlt(n_row,done,sv%dv%v%v,x,dzero,ty,trans=trans_)
+
+        case('Y')
+          call psb_geaxpby(done,x,dzero,tx,desc_data,info)
+          call psb_geaxpby(done,y,dzero,ty,desc_data,info)
+          call psb_spmm(-done,sv%a,ty,done,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          call inner_mlt(n_row,done,sv%dv%v%v,tx,dzero,ty,trans=trans_)
+
+        case('U')
+          if (.not.present(initu)) then
+            call psb_errpush(psb_err_internal_error_,name,&
+                 & a_err='missing initu to smoother_apply')
+            goto 9999
+          end if
+          call psb_geaxpby(done,x,dzero,tx,desc_data,info)
+          call psb_geaxpby(done,initu,dzero,ty,desc_data,info)
+          call psb_spmm(-done,sv%a,ty,done,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          call inner_mlt(n_row,done,sv%dv%v%v,tx,dzero,ty,trans=trans_)
+
+        case default
+          call psb_errpush(psb_err_internal_error_,name,&
+               & a_err='wrong  init to smoother_apply')
+          goto 9999
+        end select
+
+        do i=1, sweeps-1
+          !
+          ! Compute Y(j+1) =  Y(j)+ D^(-1)*(X-A*Y(j)),
+          !  where is the diagonal and  A the matrix.
+          !
+          call psb_geaxpby(done,x,dzero,tx,desc_data,info)
+          call psb_spmm(-done,sv%a,ty,done,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          if (info /= psb_success_) exit
+          call inner_mlt(n_row,done,sv%dv%v%v,tx,done,ty,trans=trans_)
+          if (info /= psb_success_) exit
+        end do
+
+        if (info == psb_success_) call psb_geaxpby(alpha,ty,beta,y,desc_data,info)
+
+        if (info /= psb_success_) then
+          info=psb_err_internal_error_
+          call psb_errpush(info,name,&
+               & a_err='subsolve with Jacobi sweeps > 1')
+          goto 9999
+        end if
+
+
+      end associate
+
+
+    else
+      
+      info = psb_err_iarg_neg_
+      call psb_errpush(info,name,&
+           & i_err=(/itwo,sweeps,izero,izero,izero/))
+      goto 9999
+      
+    end if
+
+  if (.not.(4*n_col <= size(work))) then
+    deallocate(aux)
+  endif
+
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+contains
+  subroutine inner_mlt(n_row,alpha,d,x,beta,y,trans)
+    implicit none
+    integer(psb_ipk_),intent(in)   :: n_row
+    real(psb_dpk_), intent(inout) :: d(:)
+    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
+
+    integer(psb_ipk_) :: i
+    
+    if (trans_ == 'C') then 
+      if (beta == dzero) then 
+
+        if (alpha == dzero) then 
+          y(1:n_row) = dzero
+        else if (alpha == done) then 
+          do i=1, n_row
+            y(i) = (d(i)) * x(i)
+          end do
+        else if (alpha == -done) then 
+          do i=1, n_row
+            y(i) = -(d(i)) * x(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * (d(i)) * x(i)
+          end do
+        end if
+
+      else if (beta == done) then 
+
+        if (alpha == dzero) then 
+          !y(1:n_row) = dzero
+        else if (alpha == done) then 
+          do i=1, n_row
+            y(i) = (d(i)) * x(i) + y(i)
+          end do
+        else if (alpha == -done) then 
+          do i=1, n_row
+            y(i) = -(d(i)) * x(i)  + y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * (d(i)) * x(i) + y(i)
+          end do
+        end if
+
+      else if (beta == -done) then 
+
+        if (alpha == dzero) then 
+          y(1:n_row) = -y(1:n_row)        
+        else if (alpha == done) then 
+          do i=1, n_row
+            y(i) = (d(i)) * x(i) - y(i)
+          end do
+        else if (alpha == -done) then 
+          do i=1, n_row
+            y(i) = -(d(i)) * x(i)  - y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * (d(i)) * x(i) - y(i)
+          end do
+        end if
+
+      else
+
+        if (alpha == dzero) then 
+          y(1:n_row) = beta *y(1:n_row)        
+        else if (alpha == done) then 
+          do i=1, n_row
+            y(i) = (d(i)) * x(i) + beta*y(i)
+          end do
+        else if (alpha == -done) then 
+          do i=1, n_row
+            y(i) = -(d(i)) * x(i)  + beta*y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * (d(i)) * x(i) + beta*y(i)
+          end do
+        end if
+
+      end if
+
+    else if (trans_ /= 'C') then 
+
+      if (beta == dzero) then 
+
+        if (alpha == dzero) then 
+          y(1:n_row) = dzero
+        else if (alpha == done) then 
+          do i=1, n_row
+            y(i) = d(i) * x(i)
+          end do
+        else if (alpha == -done) then 
+          do i=1, n_row
+            y(i) = -d(i) * x(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * d(i) * x(i)
+          end do
+        end if
+
+      else if (beta == done) then 
+
+        if (alpha == dzero) then 
+          !y(1:n_row) = dzero
+        else if (alpha == done) then 
+          do i=1, n_row
+            y(i) = d(i) * x(i) + y(i)
+          end do
+        else if (alpha == -done) then 
+          do i=1, n_row
+            y(i) = -d(i) * x(i)  + y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * d(i) * x(i) + y(i)
+          end do
+        end if
+
+      else if (beta == -done) then 
+
+        if (alpha == dzero) then 
+          y(1:n_row) = -y(1:n_row)        
+        else if (alpha == done) then 
+          do i=1, n_row
+            y(i) = d(i) * x(i) - y(i)
+          end do
+        else if (alpha == -done) then 
+          do i=1, n_row
+            y(i) = -d(i) * x(i)  - y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * d(i) * x(i) - y(i)
+          end do
+        end if
+
+      else
+
+        if (alpha == dzero) then 
+          y(1:n_row) = beta *y(1:n_row)        
+        else if (alpha == done) then 
+          do i=1, n_row
+            y(i) = d(i) * x(i) + beta*y(i)
+          end do
+        else if (alpha == -done) then 
+          do i=1, n_row
+            y(i) = -d(i) * x(i)  + beta*y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * d(i) * x(i) + beta*y(i)
+          end do
+        end if
+
+      end if
+
+    end if
+
+  end subroutine inner_mlt
+end subroutine amg_d_jac_solver_apply

amgprec/impl/solver/amg_d_jac_solver_apply_vect.f90

@@ -0,0 +1,190 @@
+!
+!
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!
+!    (C) Copyright 2021
+!
+!        Salvatore Filippone
+!        Pasqua D'Ambra
+!        Daniela di Serafino
+!
+!    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_jac_solver_apply_vect(alpha,sv,x,beta,y,desc_data,trans,&
+     & work,wv,info,init,initu)
+
+  use psb_base_mod
+  use amg_d_diag_solver
+  use psb_base_krylov_conv_mod, only : log_conv
+  use amg_d_jac_solver, amg_protect_name => amg_d_jac_solver_apply_vect
+  implicit none
+  type(psb_desc_type), intent(in)                 :: desc_data
+  class(amg_d_jac_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, sweeps
+  type(psb_d_vect_type)  :: tx, ty, r
+  real(psb_dpk_), pointer :: aux(:)
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: np, me, i, err_act
+  character           :: trans_, init_
+  real(psb_dpk_)      :: res, resdenum
+  character(len=20)   :: name='d_jac_solver_apply_v'
+
+  call psb_erractionsave(err_act)
+
+  info = psb_success_
+  ctxt = desc_data%get_context()
+  call psb_info(ctxt,me,np)
+
+
+  if (present(init)) then
+    init_ = psb_toupper(init)
+  else
+    init_='Z'
+  end if
+
+  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
+
+
+  
+  n_row = desc_data%get_local_rows()
+  n_col = desc_data%get_local_cols()
+  sweeps = sv%sweeps
+  if (4*n_col <= size(work)) then
+    aux => work(:)
+  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,izero,izero,izero,izero/),&
+           & a_err='real(psb_dpk_)')
+      goto 9999
+    end if
+  endif
+
+  if (sweeps >= 0) then
+      !
+      ! This means we are dealing with a pure Jacobi smoother/solver.
+      !
+      associate(tx => wv(1), ty => wv(2))
+        select case (init_)
+        case('Z')
+
+          call ty%mlt(done,sv%dv,x,dzero,info,conjgx=trans_)
+
+        case('Y')
+          call psb_geaxpby(done,x,dzero,tx,desc_data,info)
+          call psb_geaxpby(done,y,dzero,ty,desc_data,info)
+          call psb_spmm(-done,sv%a,ty,done,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          call ty%mlt(done,sv%dv,tx,dzero,info,conjgx=trans_)
+
+        case('U')
+          if (.not.present(initu)) then
+            call psb_errpush(psb_err_internal_error_,name,&
+                 & a_err='missing initu to smoother_apply')
+            goto 9999
+          end if
+          call psb_geaxpby(done,x,dzero,tx,desc_data,info)
+          call psb_geaxpby(done,initu,dzero,ty,desc_data,info)
+          call psb_spmm(-done,sv%a,ty,done,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          call ty%mlt(done,sv%dv,tx,dzero,info,conjgx=trans_)
+
+        case default
+          call psb_errpush(psb_err_internal_error_,name,&
+               & a_err='wrong  init to smoother_apply')
+          goto 9999
+        end select
+
+        do i=1, sweeps-1
+          !
+          ! Compute Y(j+1) =  Y(j)+ D^(-1)*(X-A*Y(j)),
+          !  where is the diagonal and  A the matrix.
+          !
+          call psb_geaxpby(done,x,dzero,tx,desc_data,info)
+          call psb_spmm(-done,sv%a,ty,done,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          if (info /= psb_success_) exit
+          call ty%mlt(done,sv%dv,tx,done,info,conjgx=trans_)
+          if (info /= psb_success_) exit
+        end do
+
+
+        if (info == psb_success_) call psb_geaxpby(alpha,ty,beta,y,desc_data,info)
+
+        if (info /= psb_success_) then
+          info=psb_err_internal_error_
+          call psb_errpush(info,name,&
+               & a_err='subsolve with Jacobi sweeps > 1')
+          goto 9999
+        end if
+
+
+      end associate
+
+
+    else
+      
+      info = psb_err_iarg_neg_
+      call psb_errpush(info,name,&
+           & i_err=(/itwo,sweeps,izero,izero,izero/))
+      goto 9999
+      
+    end if
+
+  if (.not.(4*n_col <= size(work))) then
+    deallocate(aux)
+  endif
+
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+
+end subroutine amg_d_jac_solver_apply_vect

amgprec/impl/solver/amg_d_jac_solver_bld.f90

@@ -0,0 +1,125 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+  
+  use psb_base_mod
+  use amg_d_jac_solver, amg_protect_name => amg_d_jac_solver_bld
+
+  Implicit None
+
+  ! Arguments
+  type(psb_dspmat_type), intent(in), target           :: a
+  Type(psb_desc_type), Intent(inout)                  :: desc_a 
+  class(amg_d_jac_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(:)
+  real(psb_dpk_), allocatable :: tdb(:)
+  type(psb_d_csr_sparse_mat) :: tcsr
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: np, me, i, err_act, debug_unit, debug_level
+  character(len=20)   :: name='d_jac_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'
+
+
+  n_row  = desc_a%get_local_rows()
+  nrow_a = a%get_nrows()
+  if (present(b)) then
+    info=psb_err_internal_error_
+    call psb_errpush(info,name)
+    goto 9999      
+  end if
+  call a%cp_to(tcsr)
+  call sv%a%mv_from(tcsr)
+  if (present(amold)) call sv%a%cscnv(info,mold=amold)
+  
+  sv%d = a%get_diag(info)
+  if (info == psb_success_) call psb_realloc(n_row,sv%d,info)
+  if (present(b)) then 
+    tdb=b%get_diag(info)
+    if (size(tdb)+nrow_a > n_row) call psb_realloc(nrow_a+size(tdb),sv%d,info)
+    if (info == psb_success_) sv%d(nrow_a+1:nrow_a+size(tdb)) = tdb(:)
+  end if
+  if (info /= psb_success_) then 
+    call psb_errpush(psb_err_from_subroutine_,name,a_err='get_diag')
+    goto 9999      
+  end if
+
+  do i=1,n_row
+    if (sv%d(i) == dzero) then 
+      sv%d(i) = done
+    else
+      sv%d(i) = done/sv%d(i)
+    end if
+  end do
+  allocate(sv%dv,stat=info) 
+  if (info == psb_success_) then 
+    call sv%dv%bld(sv%d)
+    if (present(vmold)) call sv%dv%cnv(vmold)
+    call sv%dv%sync()
+  else
+    call psb_errpush(psb_err_from_subroutine_,name,& 
+         & a_err='Allocate sv%dv')
+    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_jac_solver_bld
+
+

amgprec/impl/solver/amg_d_jac_solver_clear_data.f90

@@ -0,0 +1,65 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_clear_data(sv,info)
+  
+  use psb_base_mod
+  use amg_d_jac_solver, amg_protect_name => amg_d_jac_solver_clear_data
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_jac_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(out)               :: info
+  ! Local variables
+  integer(psb_ipk_) :: err_act
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+
+  call sv%a%free()
+  call sv%dv%free(info)
+  if ((info==0).and.allocated(sv%d)) deallocate(sv%d,stat=info)
+  if (info /= 0) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+end subroutine amg_d_jac_solver_clear_data

amgprec/impl/solver/amg_d_jac_solver_clone.f90

@@ -0,0 +1,88 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_clone(sv,svout,info)
+  
+  use psb_base_mod
+  use amg_d_jac_solver, amg_protect_name => amg_d_jac_solver_clone
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_jac_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(svout, mold=sv, stat=info)
+  if (info /= 0) then 
+    info = psb_err_alloc_dealloc_
+    goto 9999 
+  end if
+
+  select type(svo => svout)
+  class is (amg_d_jac_solver_type)
+    svo%sweeps = sv%sweeps
+    svo%eps    = sv%eps
+    if (info == psb_success_) &
+         & call sv%a%clone(svo%a,info)
+    if (info == psb_success_) &
+         & call sv%dv%clone(svo%dv,info)
+    svo%d = sv%d
+    
+  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_jac_solver_clone

amgprec/impl/solver/amg_d_jac_solver_clone_settings.f90

@@ -0,0 +1,69 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_clone_settings(sv,svout,info)
+  
+  use psb_base_mod
+  use amg_d_jac_solver, amg_protect_name =>  amg_d_jac_solver_clone_settings
+  Implicit None
+  ! Arguments
+  class(amg_d_jac_solver_type), intent(inout) :: sv
+  class(amg_d_base_solver_type), intent(inout) :: svout
+  integer(psb_ipk_), intent(out)                 :: info
+  integer(psb_ipk_)  :: err_act
+  character(len=20) :: name='d_jac_solver_clone_settings'
+
+  call psb_erractionsave(err_act)
+
+  select type(svout)
+  class is(amg_d_jac_solver_type)
+    svout%sweeps = sv%sweeps
+    svout%eps    = sv%eps
+    
+  class default    
+    info = psb_err_internal_error_
+    call psb_errpush(info,name)
+    goto 9999 
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+end subroutine amg_d_jac_solver_clone_settings

amgprec/impl/solver/amg_d_jac_solver_cnv.f90

@@ -0,0 +1,72 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_cnv(sv,info,amold,vmold,imold)
+
+  use psb_base_mod
+  use amg_d_jac_solver, amg_protect_name => amg_d_jac_solver_cnv
+
+  Implicit None
+
+  ! Arguments
+  class(amg_d_jac_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 variables
+  integer(psb_ipk_) :: err_act, debug_unit, debug_level
+  character(len=20) :: name='d_jac_solver_cnv', ch_err
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+  debug_unit  = psb_get_debug_unit()
+  debug_level = psb_get_debug_level()
+
+  if (present(amold)) call sv%a%cscnv(info,mold=amold)
+  if ((info==0).and.present(vmold)) call sv%dv%cnv(mold=vmold)
+
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) trim(name),' end'
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+end subroutine amg_d_jac_solver_cnv

amgprec/impl/solver/amg_d_jac_solver_dmp.f90

@@ -0,0 +1,107 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_dmp(sv,desc,level,info,prefix,head,solver,global_num)
+
+  use psb_base_mod
+  use amg_d_jac_solver, amg_protect_name => amg_d_jac_solver_dmp
+  implicit none 
+  class(amg_d_jac_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
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: iam, np
+  character(len=80)   :: prefix_
+  character(len=120)  :: fname ! len should be at least 20 more than
+  logical :: solver_, global_num_
+  integer(psb_lpk_), allocatable :: iv(:)
+  !  len of prefix_ 
+
+  info = 0
+
+  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
+
+
+  if (solver_) then 
+    if (present(prefix)) then 
+      prefix_ = trim(prefix(1:min(len(prefix),len(prefix_))))
+    else
+      prefix_ = "dump_slv_d"
+    end if
+    lname = len_trim(prefix_)
+    fname = trim(prefix_)
+    write(fname(lname+1:lname+5),'(a,i3.3)') '_p',iam
+    lname = lname + 5
+    
+    if (global_num_) then
+      iv = desc%get_global_indices(owned=.false.)      
+
+      write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_nd.mtx'
+      if (sv%a%is_asb()) &
+           & call sv%a%print(fname,head=head,iv=iv)
+      write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_diag.mtx'
+      if (allocated(sv%dv)) &
+           & call psb_geprt(fname,sv%dv%v%v,head=head)
+      
+    else
+
+      write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_nd.mtx'
+      if (sv%a%is_asb()) &
+           & call sv%a%print(fname,head=head)
+      write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_diag.mtx'
+      if (allocated(sv%dv)) &
+           & call psb_geprt(fname,sv%dv%v%v,head=head)
+    end if
+  end if
+
+end subroutine amg_d_jac_solver_dmp

amgprec/impl/solver/amg_d_l1_jac_solver_bld.f90

@@ -0,0 +1,128 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_l1_jac_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+  
+  use psb_base_mod
+  use amg_d_jac_solver, amg_protect_name => amg_d_l1_jac_solver_bld
+
+  Implicit None
+
+  ! Arguments
+  type(psb_dspmat_type), intent(in), target           :: a
+  Type(psb_desc_type), Intent(inout)                  :: desc_a 
+  class(amg_d_l1_jac_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_), allocatable :: tdb(:), tx(:),ty(:)
+  type(psb_d_csr_sparse_mat) :: tcsr
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: np, me, i, err_act, debug_unit, debug_level
+  character(len=20)   :: name='d_l1_jac_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'
+
+
+  n_row  = desc_a%get_local_rows()
+  nrow_a = a%get_nrows()
+  if (present(b)) then
+    info=psb_err_internal_error_
+    call psb_errpush(info,name)
+    goto 9999      
+  end if
+    
+  call a%cp_to(tcsr)
+  call sv%a%mv_from(tcsr)
+  if (present(amold)) call sv%a%cscnv(info,mold=amold)
+  
+  tx   = a%get_diag(info)
+  sv%d = a%arwsum(info)
+  sv%d(:) = sv%d(:) - abs(tx(:)) + tx(:) 
+  if (info == psb_success_) call psb_realloc(n_row,sv%d,info)
+  if (present(b)) then 
+    tdb=b%arwsum(info)
+    ty =b%get_diag(info)
+    if (size(tdb)+nrow_a > n_row) call psb_realloc(nrow_a+size(tdb),sv%d,info)
+    if (info == psb_success_) sv%d(nrow_a+1:nrow_a+size(tdb)) = tdb(:) - abs(ty(:)) + ty(:)
+  end if
+  if (info /= psb_success_) then 
+    call psb_errpush(psb_err_from_subroutine_,name,a_err='get_diag')
+    goto 9999      
+  end if
+
+  do i=1,n_row
+    if (sv%d(i) == dzero) then 
+      sv%d(i) = done
+    else
+      sv%d(i) = done/sv%d(i)
+    end if
+  end do
+  allocate(sv%dv,stat=info) 
+  if (info == psb_success_) then 
+    call sv%dv%bld(sv%d)
+    if (present(vmold)) call sv%dv%cnv(vmold)
+    call sv%dv%sync()
+  else
+    call psb_errpush(psb_err_from_subroutine_,name,& 
+         & a_err='Allocate sv%dv')
+    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_l1_jac_solver_bld
+
+

amgprec/impl/solver/amg_s_base_ainv_solver_cnv.f90

@@ -47,7 +47,6 @@ subroutine amg_s_base_ainv_solver_cnv(sv,info,amold,vmold,imold)
   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_

amgprec/impl/solver/amg_s_diag_solver_bld.f90

@@ -132,8 +132,7 @@ subroutine amg_s_l1_diag_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
   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(:)
-  real(psb_spk_), allocatable :: tdb(:)
+  real(psb_spk_), allocatable :: tdb(:), tx(:), ty(:) 
   type(psb_ctxt_type) :: ctxt
   integer(psb_ipk_)   :: np, me, i, err_act, debug_unit, debug_level
   character(len=20)   :: name='s_l1_diag_solver_bld', ch_err
@@ -151,12 +150,15 @@ subroutine amg_s_l1_diag_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
   n_row  = desc_a%get_local_rows()
   nrow_a = a%get_nrows()
 
+  tx   = a%get_diag(info)
   sv%d = a%arwsum(info)
+  sv%d(:) = sv%d(:) - abs(tx(:)) + tx(:) 
   if (info == psb_success_) call psb_realloc(n_row,sv%d,info)
   if (present(b)) then 
     tdb=b%arwsum(info)
+    ty =b%get_diag(info)
     if (size(tdb)+nrow_a > n_row) call psb_realloc(nrow_a+size(tdb),sv%d,info)
-    if (info == psb_success_) sv%d(nrow_a+1:nrow_a+size(tdb)) = tdb(:)
+    if (info == psb_success_) sv%d(nrow_a+1:nrow_a+size(tdb)) = tdb(:) - abs(ty(:)) + ty(:)
   end if
   if (info /= psb_success_) then 
     call psb_errpush(psb_err_from_subroutine_,name,a_err='arwsum')

amgprec/impl/solver/amg_s_jac_solver_apply.f90

@@ -0,0 +1,352 @@
+!
+!
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!
+!    (C) Copyright 2021
+!
+!        Salvatore Filippone
+!        Pasqua D'Ambra
+!        Daniela di Serafino
+!
+!    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_jac_solver_apply(alpha,sv,x,beta,y,desc_data,trans,&
+     & work,info,init,initu)
+
+  use psb_base_mod
+  use amg_s_diag_solver
+  use psb_base_krylov_conv_mod, only : log_conv
+  use amg_s_jac_solver, amg_protect_name => amg_s_jac_solver_apply
+  implicit none
+  type(psb_desc_type), intent(in)                 :: desc_data
+  class(amg_s_jac_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, sweeps
+  real(psb_spk_), pointer :: aux(:)
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: np, me, i, err_act
+  character           :: trans_, init_
+  real(psb_dpk_)      :: res, resdenum
+  character(len=20)   :: name='s_jac_solver_apply_v'
+
+  call psb_erractionsave(err_act)
+
+  info = psb_success_
+  ctxt = desc_data%get_context()
+  call psb_info(ctxt,me,np)
+
+
+  if (present(init)) then
+    init_ = psb_toupper(init)
+  else
+    init_='Z'
+  end if
+
+  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
+
+
+  
+  n_row = desc_data%get_local_rows()
+  n_col = desc_data%get_local_cols()
+  sweeps = sv%sweeps
+  if (4*n_col <= size(work)) then
+    aux => work(:)
+  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,izero,izero,izero,izero/),&
+           & a_err='real(psb_spk_)')
+      goto 9999
+    end if
+  endif
+
+  if (sweeps >= 0) then
+      !
+      ! This means we are dealing with a pure Jacobi smoother/solver.
+      !
+      associate(tx => aux(1:n_col), ty => aux(n_col+1:2*n_col))
+        select case (init_)
+        case('Z')
+
+          call inner_mlt(n_row,sone,sv%dv%v%v,x,szero,ty,trans=trans_)
+
+        case('Y')
+          call psb_geaxpby(sone,x,szero,tx,desc_data,info)
+          call psb_geaxpby(sone,y,szero,ty,desc_data,info)
+          call psb_spmm(-sone,sv%a,ty,sone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          call inner_mlt(n_row,sone,sv%dv%v%v,tx,szero,ty,trans=trans_)
+
+        case('U')
+          if (.not.present(initu)) then
+            call psb_errpush(psb_err_internal_error_,name,&
+                 & a_err='missing initu to smoother_apply')
+            goto 9999
+          end if
+          call psb_geaxpby(sone,x,szero,tx,desc_data,info)
+          call psb_geaxpby(sone,initu,szero,ty,desc_data,info)
+          call psb_spmm(-sone,sv%a,ty,sone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          call inner_mlt(n_row,sone,sv%dv%v%v,tx,szero,ty,trans=trans_)
+
+        case default
+          call psb_errpush(psb_err_internal_error_,name,&
+               & a_err='wrong  init to smoother_apply')
+          goto 9999
+        end select
+
+        do i=1, sweeps-1
+          !
+          ! Compute Y(j+1) =  Y(j)+ D^(-1)*(X-A*Y(j)),
+          !  where is the diagonal and  A the matrix.
+          !
+          call psb_geaxpby(sone,x,szero,tx,desc_data,info)
+          call psb_spmm(-sone,sv%a,ty,sone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          if (info /= psb_success_) exit
+          call inner_mlt(n_row,sone,sv%dv%v%v,tx,sone,ty,trans=trans_)
+          if (info /= psb_success_) exit
+        end do
+
+        if (info == psb_success_) call psb_geaxpby(alpha,ty,beta,y,desc_data,info)
+
+        if (info /= psb_success_) then
+          info=psb_err_internal_error_
+          call psb_errpush(info,name,&
+               & a_err='subsolve with Jacobi sweeps > 1')
+          goto 9999
+        end if
+
+
+      end associate
+
+
+    else
+      
+      info = psb_err_iarg_neg_
+      call psb_errpush(info,name,&
+           & i_err=(/itwo,sweeps,izero,izero,izero/))
+      goto 9999
+      
+    end if
+
+  if (.not.(4*n_col <= size(work))) then
+    deallocate(aux)
+  endif
+
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+contains
+  subroutine inner_mlt(n_row,alpha,d,x,beta,y,trans)
+    implicit none
+    integer(psb_ipk_),intent(in)   :: n_row
+    real(psb_spk_), intent(inout) :: d(:)
+    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
+
+    integer(psb_ipk_) :: i
+    
+    if (trans_ == 'C') then 
+      if (beta == szero) then 
+
+        if (alpha == szero) then 
+          y(1:n_row) = szero
+        else if (alpha == sone) then 
+          do i=1, n_row
+            y(i) = (d(i)) * x(i)
+          end do
+        else if (alpha == -sone) then 
+          do i=1, n_row
+            y(i) = -(d(i)) * x(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * (d(i)) * x(i)
+          end do
+        end if
+
+      else if (beta == sone) then 
+
+        if (alpha == szero) then 
+          !y(1:n_row) = szero
+        else if (alpha == sone) then 
+          do i=1, n_row
+            y(i) = (d(i)) * x(i) + y(i)
+          end do
+        else if (alpha == -sone) then 
+          do i=1, n_row
+            y(i) = -(d(i)) * x(i)  + y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * (d(i)) * x(i) + y(i)
+          end do
+        end if
+
+      else if (beta == -sone) then 
+
+        if (alpha == szero) then 
+          y(1:n_row) = -y(1:n_row)        
+        else if (alpha == sone) then 
+          do i=1, n_row
+            y(i) = (d(i)) * x(i) - y(i)
+          end do
+        else if (alpha == -sone) then 
+          do i=1, n_row
+            y(i) = -(d(i)) * x(i)  - y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * (d(i)) * x(i) - y(i)
+          end do
+        end if
+
+      else
+
+        if (alpha == szero) then 
+          y(1:n_row) = beta *y(1:n_row)        
+        else if (alpha == sone) then 
+          do i=1, n_row
+            y(i) = (d(i)) * x(i) + beta*y(i)
+          end do
+        else if (alpha == -sone) then 
+          do i=1, n_row
+            y(i) = -(d(i)) * x(i)  + beta*y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * (d(i)) * x(i) + beta*y(i)
+          end do
+        end if
+
+      end if
+
+    else if (trans_ /= 'C') then 
+
+      if (beta == szero) then 
+
+        if (alpha == szero) then 
+          y(1:n_row) = szero
+        else if (alpha == sone) then 
+          do i=1, n_row
+            y(i) = d(i) * x(i)
+          end do
+        else if (alpha == -sone) then 
+          do i=1, n_row
+            y(i) = -d(i) * x(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * d(i) * x(i)
+          end do
+        end if
+
+      else if (beta == sone) then 
+
+        if (alpha == szero) then 
+          !y(1:n_row) = szero
+        else if (alpha == sone) then 
+          do i=1, n_row
+            y(i) = d(i) * x(i) + y(i)
+          end do
+        else if (alpha == -sone) then 
+          do i=1, n_row
+            y(i) = -d(i) * x(i)  + y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * d(i) * x(i) + y(i)
+          end do
+        end if
+
+      else if (beta == -sone) then 
+
+        if (alpha == szero) then 
+          y(1:n_row) = -y(1:n_row)        
+        else if (alpha == sone) then 
+          do i=1, n_row
+            y(i) = d(i) * x(i) - y(i)
+          end do
+        else if (alpha == -sone) then 
+          do i=1, n_row
+            y(i) = -d(i) * x(i)  - y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * d(i) * x(i) - y(i)
+          end do
+        end if
+
+      else
+
+        if (alpha == szero) then 
+          y(1:n_row) = beta *y(1:n_row)        
+        else if (alpha == sone) then 
+          do i=1, n_row
+            y(i) = d(i) * x(i) + beta*y(i)
+          end do
+        else if (alpha == -sone) then 
+          do i=1, n_row
+            y(i) = -d(i) * x(i)  + beta*y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * d(i) * x(i) + beta*y(i)
+          end do
+        end if
+
+      end if
+
+    end if
+
+  end subroutine inner_mlt
+end subroutine amg_s_jac_solver_apply

amgprec/impl/solver/amg_s_jac_solver_apply_vect.f90

@@ -0,0 +1,190 @@
+!
+!
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!
+!    (C) Copyright 2021
+!
+!        Salvatore Filippone
+!        Pasqua D'Ambra
+!        Daniela di Serafino
+!
+!    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_jac_solver_apply_vect(alpha,sv,x,beta,y,desc_data,trans,&
+     & work,wv,info,init,initu)
+
+  use psb_base_mod
+  use amg_s_diag_solver
+  use psb_base_krylov_conv_mod, only : log_conv
+  use amg_s_jac_solver, amg_protect_name => amg_s_jac_solver_apply_vect
+  implicit none
+  type(psb_desc_type), intent(in)                 :: desc_data
+  class(amg_s_jac_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, sweeps
+  type(psb_s_vect_type)  :: tx, ty, r
+  real(psb_spk_), pointer :: aux(:)
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: np, me, i, err_act
+  character           :: trans_, init_
+  real(psb_dpk_)      :: res, resdenum
+  character(len=20)   :: name='s_jac_solver_apply_v'
+
+  call psb_erractionsave(err_act)
+
+  info = psb_success_
+  ctxt = desc_data%get_context()
+  call psb_info(ctxt,me,np)
+
+
+  if (present(init)) then
+    init_ = psb_toupper(init)
+  else
+    init_='Z'
+  end if
+
+  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
+
+
+  
+  n_row = desc_data%get_local_rows()
+  n_col = desc_data%get_local_cols()
+  sweeps = sv%sweeps
+  if (4*n_col <= size(work)) then
+    aux => work(:)
+  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,izero,izero,izero,izero/),&
+           & a_err='real(psb_spk_)')
+      goto 9999
+    end if
+  endif
+
+  if (sweeps >= 0) then
+      !
+      ! This means we are dealing with a pure Jacobi smoother/solver.
+      !
+      associate(tx => wv(1), ty => wv(2))
+        select case (init_)
+        case('Z')
+
+          call ty%mlt(sone,sv%dv,x,szero,info,conjgx=trans_)
+
+        case('Y')
+          call psb_geaxpby(sone,x,szero,tx,desc_data,info)
+          call psb_geaxpby(sone,y,szero,ty,desc_data,info)
+          call psb_spmm(-sone,sv%a,ty,sone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          call ty%mlt(sone,sv%dv,tx,szero,info,conjgx=trans_)
+
+        case('U')
+          if (.not.present(initu)) then
+            call psb_errpush(psb_err_internal_error_,name,&
+                 & a_err='missing initu to smoother_apply')
+            goto 9999
+          end if
+          call psb_geaxpby(sone,x,szero,tx,desc_data,info)
+          call psb_geaxpby(sone,initu,szero,ty,desc_data,info)
+          call psb_spmm(-sone,sv%a,ty,sone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          call ty%mlt(sone,sv%dv,tx,szero,info,conjgx=trans_)
+
+        case default
+          call psb_errpush(psb_err_internal_error_,name,&
+               & a_err='wrong  init to smoother_apply')
+          goto 9999
+        end select
+
+        do i=1, sweeps-1
+          !
+          ! Compute Y(j+1) =  Y(j)+ D^(-1)*(X-A*Y(j)),
+          !  where is the diagonal and  A the matrix.
+          !
+          call psb_geaxpby(sone,x,szero,tx,desc_data,info)
+          call psb_spmm(-sone,sv%a,ty,sone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          if (info /= psb_success_) exit
+          call ty%mlt(sone,sv%dv,tx,sone,info,conjgx=trans_)
+          if (info /= psb_success_) exit
+        end do
+
+
+        if (info == psb_success_) call psb_geaxpby(alpha,ty,beta,y,desc_data,info)
+
+        if (info /= psb_success_) then
+          info=psb_err_internal_error_
+          call psb_errpush(info,name,&
+               & a_err='subsolve with Jacobi sweeps > 1')
+          goto 9999
+        end if
+
+
+      end associate
+
+
+    else
+      
+      info = psb_err_iarg_neg_
+      call psb_errpush(info,name,&
+           & i_err=(/itwo,sweeps,izero,izero,izero/))
+      goto 9999
+      
+    end if
+
+  if (.not.(4*n_col <= size(work))) then
+    deallocate(aux)
+  endif
+
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+
+end subroutine amg_s_jac_solver_apply_vect

amgprec/impl/solver/amg_s_jac_solver_bld.f90

@@ -0,0 +1,125 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+  
+  use psb_base_mod
+  use amg_s_jac_solver, amg_protect_name => amg_s_jac_solver_bld
+
+  Implicit None
+
+  ! Arguments
+  type(psb_sspmat_type), intent(in), target           :: a
+  Type(psb_desc_type), Intent(inout)                  :: desc_a 
+  class(amg_s_jac_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(:)
+  real(psb_spk_), allocatable :: tdb(:)
+  type(psb_s_csr_sparse_mat) :: tcsr
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: np, me, i, err_act, debug_unit, debug_level
+  character(len=20)   :: name='s_jac_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'
+
+
+  n_row  = desc_a%get_local_rows()
+  nrow_a = a%get_nrows()
+  if (present(b)) then
+    info=psb_err_internal_error_
+    call psb_errpush(info,name)
+    goto 9999      
+  end if
+  call a%cp_to(tcsr)
+  call sv%a%mv_from(tcsr)
+  if (present(amold)) call sv%a%cscnv(info,mold=amold)
+  
+  sv%d = a%get_diag(info)
+  if (info == psb_success_) call psb_realloc(n_row,sv%d,info)
+  if (present(b)) then 
+    tdb=b%get_diag(info)
+    if (size(tdb)+nrow_a > n_row) call psb_realloc(nrow_a+size(tdb),sv%d,info)
+    if (info == psb_success_) sv%d(nrow_a+1:nrow_a+size(tdb)) = tdb(:)
+  end if
+  if (info /= psb_success_) then 
+    call psb_errpush(psb_err_from_subroutine_,name,a_err='get_diag')
+    goto 9999      
+  end if
+
+  do i=1,n_row
+    if (sv%d(i) == szero) then 
+      sv%d(i) = sone
+    else
+      sv%d(i) = sone/sv%d(i)
+    end if
+  end do
+  allocate(sv%dv,stat=info) 
+  if (info == psb_success_) then 
+    call sv%dv%bld(sv%d)
+    if (present(vmold)) call sv%dv%cnv(vmold)
+    call sv%dv%sync()
+  else
+    call psb_errpush(psb_err_from_subroutine_,name,& 
+         & a_err='Allocate sv%dv')
+    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_jac_solver_bld
+
+

amgprec/impl/solver/amg_s_jac_solver_clear_data.f90

@@ -0,0 +1,65 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_clear_data(sv,info)
+  
+  use psb_base_mod
+  use amg_s_jac_solver, amg_protect_name => amg_s_jac_solver_clear_data
+
+  Implicit None
+
+  ! Arguments
+  class(amg_s_jac_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(out)               :: info
+  ! Local variables
+  integer(psb_ipk_) :: err_act
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+
+  call sv%a%free()
+  call sv%dv%free(info)
+  if ((info==0).and.allocated(sv%d)) deallocate(sv%d,stat=info)
+  if (info /= 0) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+end subroutine amg_s_jac_solver_clear_data

amgprec/impl/solver/amg_s_jac_solver_clone.f90

@@ -0,0 +1,88 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_clone(sv,svout,info)
+  
+  use psb_base_mod
+  use amg_s_jac_solver, amg_protect_name => amg_s_jac_solver_clone
+
+  Implicit None
+
+  ! Arguments
+  class(amg_s_jac_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(svout, mold=sv, stat=info)
+  if (info /= 0) then 
+    info = psb_err_alloc_dealloc_
+    goto 9999 
+  end if
+
+  select type(svo => svout)
+  class is (amg_s_jac_solver_type)
+    svo%sweeps = sv%sweeps
+    svo%eps    = sv%eps
+    if (info == psb_success_) &
+         & call sv%a%clone(svo%a,info)
+    if (info == psb_success_) &
+         & call sv%dv%clone(svo%dv,info)
+    svo%d = sv%d
+    
+  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_jac_solver_clone

amgprec/impl/solver/amg_s_jac_solver_clone_settings.f90

@@ -0,0 +1,69 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_clone_settings(sv,svout,info)
+  
+  use psb_base_mod
+  use amg_s_jac_solver, amg_protect_name =>  amg_s_jac_solver_clone_settings
+  Implicit None
+  ! Arguments
+  class(amg_s_jac_solver_type), intent(inout) :: sv
+  class(amg_s_base_solver_type), intent(inout) :: svout
+  integer(psb_ipk_), intent(out)                 :: info
+  integer(psb_ipk_)  :: err_act
+  character(len=20) :: name='s_jac_solver_clone_settings'
+
+  call psb_erractionsave(err_act)
+
+  select type(svout)
+  class is(amg_s_jac_solver_type)
+    svout%sweeps = sv%sweeps
+    svout%eps    = sv%eps
+    
+  class default    
+    info = psb_err_internal_error_
+    call psb_errpush(info,name)
+    goto 9999 
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+end subroutine amg_s_jac_solver_clone_settings

amgprec/impl/solver/amg_s_jac_solver_cnv.f90

@@ -0,0 +1,72 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_cnv(sv,info,amold,vmold,imold)
+
+  use psb_base_mod
+  use amg_s_jac_solver, amg_protect_name => amg_s_jac_solver_cnv
+
+  Implicit None
+
+  ! Arguments
+  class(amg_s_jac_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
+  ! Local variables
+  integer(psb_ipk_) :: err_act, debug_unit, debug_level
+  character(len=20) :: name='s_jac_solver_cnv', ch_err
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+  debug_unit  = psb_get_debug_unit()
+  debug_level = psb_get_debug_level()
+
+  if (present(amold)) call sv%a%cscnv(info,mold=amold)
+  if ((info==0).and.present(vmold)) call sv%dv%cnv(mold=vmold)
+
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) trim(name),' end'
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+end subroutine amg_s_jac_solver_cnv

amgprec/impl/solver/amg_s_jac_solver_dmp.f90

@@ -0,0 +1,107 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_jac_solver_dmp(sv,desc,level,info,prefix,head,solver,global_num)
+
+  use psb_base_mod
+  use amg_s_jac_solver, amg_protect_name => amg_s_jac_solver_dmp
+  implicit none 
+  class(amg_s_jac_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
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: iam, np
+  character(len=80)   :: prefix_
+  character(len=120)  :: fname ! len should be at least 20 more than
+  logical :: solver_, global_num_
+  integer(psb_lpk_), allocatable :: iv(:)
+  !  len of prefix_ 
+
+  info = 0
+
+  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
+
+
+  if (solver_) then 
+    if (present(prefix)) then 
+      prefix_ = trim(prefix(1:min(len(prefix),len(prefix_))))
+    else
+      prefix_ = "dump_slv_s"
+    end if
+    lname = len_trim(prefix_)
+    fname = trim(prefix_)
+    write(fname(lname+1:lname+5),'(a,i3.3)') '_p',iam
+    lname = lname + 5
+    
+    if (global_num_) then
+      iv = desc%get_global_indices(owned=.false.)      
+
+      write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_nd.mtx'
+      if (sv%a%is_asb()) &
+           & call sv%a%print(fname,head=head,iv=iv)
+      write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_diag.mtx'
+      if (allocated(sv%dv)) &
+           & call psb_geprt(fname,sv%dv%v%v,head=head)
+      
+    else
+
+      write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_nd.mtx'
+      if (sv%a%is_asb()) &
+           & call sv%a%print(fname,head=head)
+      write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_diag.mtx'
+      if (allocated(sv%dv)) &
+           & call psb_geprt(fname,sv%dv%v%v,head=head)
+    end if
+  end if
+
+end subroutine amg_s_jac_solver_dmp

amgprec/impl/solver/amg_s_l1_jac_solver_bld.f90

@@ -0,0 +1,128 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_l1_jac_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+  
+  use psb_base_mod
+  use amg_s_jac_solver, amg_protect_name => amg_s_l1_jac_solver_bld
+
+  Implicit None
+
+  ! Arguments
+  type(psb_sspmat_type), intent(in), target           :: a
+  Type(psb_desc_type), Intent(inout)                  :: desc_a 
+  class(amg_s_l1_jac_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_), allocatable :: tdb(:), tx(:),ty(:)
+  type(psb_s_csr_sparse_mat) :: tcsr
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: np, me, i, err_act, debug_unit, debug_level
+  character(len=20)   :: name='s_l1_jac_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'
+
+
+  n_row  = desc_a%get_local_rows()
+  nrow_a = a%get_nrows()
+  if (present(b)) then
+    info=psb_err_internal_error_
+    call psb_errpush(info,name)
+    goto 9999      
+  end if
+    
+  call a%cp_to(tcsr)
+  call sv%a%mv_from(tcsr)
+  if (present(amold)) call sv%a%cscnv(info,mold=amold)
+  
+  tx   = a%get_diag(info)
+  sv%d = a%arwsum(info)
+  sv%d(:) = sv%d(:) - abs(tx(:)) + tx(:) 
+  if (info == psb_success_) call psb_realloc(n_row,sv%d,info)
+  if (present(b)) then 
+    tdb=b%arwsum(info)
+    ty =b%get_diag(info)
+    if (size(tdb)+nrow_a > n_row) call psb_realloc(nrow_a+size(tdb),sv%d,info)
+    if (info == psb_success_) sv%d(nrow_a+1:nrow_a+size(tdb)) = tdb(:) - abs(ty(:)) + ty(:)
+  end if
+  if (info /= psb_success_) then 
+    call psb_errpush(psb_err_from_subroutine_,name,a_err='get_diag')
+    goto 9999      
+  end if
+
+  do i=1,n_row
+    if (sv%d(i) == szero) then 
+      sv%d(i) = sone
+    else
+      sv%d(i) = sone/sv%d(i)
+    end if
+  end do
+  allocate(sv%dv,stat=info) 
+  if (info == psb_success_) then 
+    call sv%dv%bld(sv%d)
+    if (present(vmold)) call sv%dv%cnv(vmold)
+    call sv%dv%sync()
+  else
+    call psb_errpush(psb_err_from_subroutine_,name,& 
+         & a_err='Allocate sv%dv')
+    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_l1_jac_solver_bld
+
+

amgprec/impl/solver/amg_z_base_ainv_solver_cnv.f90

@@ -47,7 +47,6 @@ subroutine amg_z_base_ainv_solver_cnv(sv,info,amold,vmold,imold)
   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_

amgprec/impl/solver/amg_z_diag_solver_bld.f90

@@ -132,8 +132,7 @@ subroutine amg_z_l1_diag_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
   class(psb_i_base_vect_type), intent(in), optional   :: imold
   ! Local variables
   integer(psb_ipk_) :: n_row,n_col, nrow_a, nztota
-  complex(psb_dpk_), pointer :: ww(:), aux(:), tx(:),ty(:)
-  complex(psb_dpk_), allocatable :: tdb(:)
+  complex(psb_dpk_), allocatable :: tdb(:), tx(:), ty(:) 
   type(psb_ctxt_type) :: ctxt
   integer(psb_ipk_)   :: np, me, i, err_act, debug_unit, debug_level
   character(len=20)   :: name='z_l1_diag_solver_bld', ch_err
@@ -151,12 +150,15 @@ subroutine amg_z_l1_diag_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
   n_row  = desc_a%get_local_rows()
   nrow_a = a%get_nrows()
 
+  tx   = a%get_diag(info)
   sv%d = a%arwsum(info)
+  sv%d(:) = sv%d(:) - abs(tx(:)) + tx(:) 
   if (info == psb_success_) call psb_realloc(n_row,sv%d,info)
   if (present(b)) then 
     tdb=b%arwsum(info)
+    ty =b%get_diag(info)
     if (size(tdb)+nrow_a > n_row) call psb_realloc(nrow_a+size(tdb),sv%d,info)
-    if (info == psb_success_) sv%d(nrow_a+1:nrow_a+size(tdb)) = tdb(:)
+    if (info == psb_success_) sv%d(nrow_a+1:nrow_a+size(tdb)) = tdb(:) - abs(ty(:)) + ty(:)
   end if
   if (info /= psb_success_) then 
     call psb_errpush(psb_err_from_subroutine_,name,a_err='arwsum')

amgprec/impl/solver/amg_z_jac_solver_apply.f90

@@ -0,0 +1,352 @@
+!
+!
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!
+!    (C) Copyright 2021
+!
+!        Salvatore Filippone
+!        Pasqua D'Ambra
+!        Daniela di Serafino
+!
+!    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_z_jac_solver_apply(alpha,sv,x,beta,y,desc_data,trans,&
+     & work,info,init,initu)
+
+  use psb_base_mod
+  use amg_z_diag_solver
+  use psb_base_krylov_conv_mod, only : log_conv
+  use amg_z_jac_solver, amg_protect_name => amg_z_jac_solver_apply
+  implicit none
+  type(psb_desc_type), intent(in)                 :: desc_data
+  class(amg_z_jac_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(:)
+  !
+  integer(psb_ipk_)    :: n_row,n_col, sweeps
+  complex(psb_dpk_), pointer :: aux(:)
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: np, me, i, err_act
+  character           :: trans_, init_
+  real(psb_dpk_)      :: res, resdenum
+  character(len=20)   :: name='z_jac_solver_apply_v'
+
+  call psb_erractionsave(err_act)
+
+  info = psb_success_
+  ctxt = desc_data%get_context()
+  call psb_info(ctxt,me,np)
+
+
+  if (present(init)) then
+    init_ = psb_toupper(init)
+  else
+    init_='Z'
+  end if
+
+  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
+
+
+  
+  n_row = desc_data%get_local_rows()
+  n_col = desc_data%get_local_cols()
+  sweeps = sv%sweeps
+  if (4*n_col <= size(work)) then
+    aux => work(:)
+  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,izero,izero,izero,izero/),&
+           & a_err='complex(psb_dpk_)')
+      goto 9999
+    end if
+  endif
+
+  if (sweeps >= 0) then
+      !
+      ! This means we are dealing with a pure Jacobi smoother/solver.
+      !
+      associate(tx => aux(1:n_col), ty => aux(n_col+1:2*n_col))
+        select case (init_)
+        case('Z')
+
+          call inner_mlt(n_row,zone,sv%dv%v%v,x,zzero,ty,trans=trans_)
+
+        case('Y')
+          call psb_geaxpby(zone,x,zzero,tx,desc_data,info)
+          call psb_geaxpby(zone,y,zzero,ty,desc_data,info)
+          call psb_spmm(-zone,sv%a,ty,zone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          call inner_mlt(n_row,zone,sv%dv%v%v,tx,zzero,ty,trans=trans_)
+
+        case('U')
+          if (.not.present(initu)) then
+            call psb_errpush(psb_err_internal_error_,name,&
+                 & a_err='missing initu to smoother_apply')
+            goto 9999
+          end if
+          call psb_geaxpby(zone,x,zzero,tx,desc_data,info)
+          call psb_geaxpby(zone,initu,zzero,ty,desc_data,info)
+          call psb_spmm(-zone,sv%a,ty,zone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          call inner_mlt(n_row,zone,sv%dv%v%v,tx,zzero,ty,trans=trans_)
+
+        case default
+          call psb_errpush(psb_err_internal_error_,name,&
+               & a_err='wrong  init to smoother_apply')
+          goto 9999
+        end select
+
+        do i=1, sweeps-1
+          !
+          ! Compute Y(j+1) =  Y(j)+ D^(-1)*(X-A*Y(j)),
+          !  where is the diagonal and  A the matrix.
+          !
+          call psb_geaxpby(zone,x,zzero,tx,desc_data,info)
+          call psb_spmm(-zone,sv%a,ty,zone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          if (info /= psb_success_) exit
+          call inner_mlt(n_row,zone,sv%dv%v%v,tx,zone,ty,trans=trans_)
+          if (info /= psb_success_) exit
+        end do
+
+        if (info == psb_success_) call psb_geaxpby(alpha,ty,beta,y,desc_data,info)
+
+        if (info /= psb_success_) then
+          info=psb_err_internal_error_
+          call psb_errpush(info,name,&
+               & a_err='subsolve with Jacobi sweeps > 1')
+          goto 9999
+        end if
+
+
+      end associate
+
+
+    else
+      
+      info = psb_err_iarg_neg_
+      call psb_errpush(info,name,&
+           & i_err=(/itwo,sweeps,izero,izero,izero/))
+      goto 9999
+      
+    end if
+
+  if (.not.(4*n_col <= size(work))) then
+    deallocate(aux)
+  endif
+
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+contains
+  subroutine inner_mlt(n_row,alpha,d,x,beta,y,trans)
+    implicit none
+    integer(psb_ipk_),intent(in)   :: n_row
+    complex(psb_dpk_), intent(inout) :: d(:)
+    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
+
+    integer(psb_ipk_) :: i
+    
+    if (trans_ == 'C') then 
+      if (beta == zzero) then 
+
+        if (alpha == zzero) then 
+          y(1:n_row) = zzero
+        else if (alpha == zone) then 
+          do i=1, n_row
+            y(i) = conjg(d(i)) * x(i)
+          end do
+        else if (alpha == -zone) then 
+          do i=1, n_row
+            y(i) = -conjg(d(i)) * x(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * conjg(d(i)) * x(i)
+          end do
+        end if
+
+      else if (beta == zone) then 
+
+        if (alpha == zzero) then 
+          !y(1:n_row) = zzero
+        else if (alpha == zone) then 
+          do i=1, n_row
+            y(i) = conjg(d(i)) * x(i) + y(i)
+          end do
+        else if (alpha == -zone) then 
+          do i=1, n_row
+            y(i) = -conjg(d(i)) * x(i)  + y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * conjg(d(i)) * x(i) + y(i)
+          end do
+        end if
+
+      else if (beta == -zone) then 
+
+        if (alpha == zzero) then 
+          y(1:n_row) = -y(1:n_row)        
+        else if (alpha == zone) then 
+          do i=1, n_row
+            y(i) = conjg(d(i)) * x(i) - y(i)
+          end do
+        else if (alpha == -zone) then 
+          do i=1, n_row
+            y(i) = -conjg(d(i)) * x(i)  - y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * conjg(d(i)) * x(i) - y(i)
+          end do
+        end if
+
+      else
+
+        if (alpha == zzero) then 
+          y(1:n_row) = beta *y(1:n_row)        
+        else if (alpha == zone) then 
+          do i=1, n_row
+            y(i) = conjg(d(i)) * x(i) + beta*y(i)
+          end do
+        else if (alpha == -zone) then 
+          do i=1, n_row
+            y(i) = -conjg(d(i)) * x(i)  + beta*y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * conjg(d(i)) * x(i) + beta*y(i)
+          end do
+        end if
+
+      end if
+
+    else if (trans_ /= 'C') then 
+
+      if (beta == zzero) then 
+
+        if (alpha == zzero) then 
+          y(1:n_row) = zzero
+        else if (alpha == zone) then 
+          do i=1, n_row
+            y(i) = d(i) * x(i)
+          end do
+        else if (alpha == -zone) then 
+          do i=1, n_row
+            y(i) = -d(i) * x(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * d(i) * x(i)
+          end do
+        end if
+
+      else if (beta == zone) then 
+
+        if (alpha == zzero) then 
+          !y(1:n_row) = zzero
+        else if (alpha == zone) then 
+          do i=1, n_row
+            y(i) = d(i) * x(i) + y(i)
+          end do
+        else if (alpha == -zone) then 
+          do i=1, n_row
+            y(i) = -d(i) * x(i)  + y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * d(i) * x(i) + y(i)
+          end do
+        end if
+
+      else if (beta == -zone) then 
+
+        if (alpha == zzero) then 
+          y(1:n_row) = -y(1:n_row)        
+        else if (alpha == zone) then 
+          do i=1, n_row
+            y(i) = d(i) * x(i) - y(i)
+          end do
+        else if (alpha == -zone) then 
+          do i=1, n_row
+            y(i) = -d(i) * x(i)  - y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * d(i) * x(i) - y(i)
+          end do
+        end if
+
+      else
+
+        if (alpha == zzero) then 
+          y(1:n_row) = beta *y(1:n_row)        
+        else if (alpha == zone) then 
+          do i=1, n_row
+            y(i) = d(i) * x(i) + beta*y(i)
+          end do
+        else if (alpha == -zone) then 
+          do i=1, n_row
+            y(i) = -d(i) * x(i)  + beta*y(i)
+          end do
+        else
+          do i=1, n_row
+            y(i) = alpha * d(i) * x(i) + beta*y(i)
+          end do
+        end if
+
+      end if
+
+    end if
+
+  end subroutine inner_mlt
+end subroutine amg_z_jac_solver_apply

amgprec/impl/solver/amg_z_jac_solver_apply_vect.f90

@@ -0,0 +1,190 @@
+!
+!
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!
+!    (C) Copyright 2021
+!
+!        Salvatore Filippone
+!        Pasqua D'Ambra
+!        Daniela di Serafino
+!
+!    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_z_jac_solver_apply_vect(alpha,sv,x,beta,y,desc_data,trans,&
+     & work,wv,info,init,initu)
+
+  use psb_base_mod
+  use amg_z_diag_solver
+  use psb_base_krylov_conv_mod, only : log_conv
+  use amg_z_jac_solver, amg_protect_name => amg_z_jac_solver_apply_vect
+  implicit none
+  type(psb_desc_type), intent(in)                 :: desc_data
+  class(amg_z_jac_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
+  !
+  integer(psb_ipk_)    :: n_row,n_col, sweeps
+  type(psb_z_vect_type)  :: tx, ty, r
+  complex(psb_dpk_), pointer :: aux(:)
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: np, me, i, err_act
+  character           :: trans_, init_
+  real(psb_dpk_)      :: res, resdenum
+  character(len=20)   :: name='z_jac_solver_apply_v'
+
+  call psb_erractionsave(err_act)
+
+  info = psb_success_
+  ctxt = desc_data%get_context()
+  call psb_info(ctxt,me,np)
+
+
+  if (present(init)) then
+    init_ = psb_toupper(init)
+  else
+    init_='Z'
+  end if
+
+  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
+
+
+  
+  n_row = desc_data%get_local_rows()
+  n_col = desc_data%get_local_cols()
+  sweeps = sv%sweeps
+  if (4*n_col <= size(work)) then
+    aux => work(:)
+  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,izero,izero,izero,izero/),&
+           & a_err='complex(psb_dpk_)')
+      goto 9999
+    end if
+  endif
+
+  if (sweeps >= 0) then
+      !
+      ! This means we are dealing with a pure Jacobi smoother/solver.
+      !
+      associate(tx => wv(1), ty => wv(2))
+        select case (init_)
+        case('Z')
+
+          call ty%mlt(zone,sv%dv,x,zzero,info,conjgx=trans_)
+
+        case('Y')
+          call psb_geaxpby(zone,x,zzero,tx,desc_data,info)
+          call psb_geaxpby(zone,y,zzero,ty,desc_data,info)
+          call psb_spmm(-zone,sv%a,ty,zone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          call ty%mlt(zone,sv%dv,tx,zzero,info,conjgx=trans_)
+
+        case('U')
+          if (.not.present(initu)) then
+            call psb_errpush(psb_err_internal_error_,name,&
+                 & a_err='missing initu to smoother_apply')
+            goto 9999
+          end if
+          call psb_geaxpby(zone,x,zzero,tx,desc_data,info)
+          call psb_geaxpby(zone,initu,zzero,ty,desc_data,info)
+          call psb_spmm(-zone,sv%a,ty,zone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          call ty%mlt(zone,sv%dv,tx,zzero,info,conjgx=trans_)
+
+        case default
+          call psb_errpush(psb_err_internal_error_,name,&
+               & a_err='wrong  init to smoother_apply')
+          goto 9999
+        end select
+
+        do i=1, sweeps-1
+          !
+          ! Compute Y(j+1) =  Y(j)+ D^(-1)*(X-A*Y(j)),
+          !  where is the diagonal and  A the matrix.
+          !
+          call psb_geaxpby(zone,x,zzero,tx,desc_data,info)
+          call psb_spmm(-zone,sv%a,ty,zone,tx,desc_data,info,&
+               & work=aux,trans=trans_, doswap=.false.)
+          if (info /= psb_success_) exit
+          call ty%mlt(zone,sv%dv,tx,zone,info,conjgx=trans_)
+          if (info /= psb_success_) exit
+        end do
+
+
+        if (info == psb_success_) call psb_geaxpby(alpha,ty,beta,y,desc_data,info)
+
+        if (info /= psb_success_) then
+          info=psb_err_internal_error_
+          call psb_errpush(info,name,&
+               & a_err='subsolve with Jacobi sweeps > 1')
+          goto 9999
+        end if
+
+
+      end associate
+
+
+    else
+      
+      info = psb_err_iarg_neg_
+      call psb_errpush(info,name,&
+           & i_err=(/itwo,sweeps,izero,izero,izero/))
+      goto 9999
+      
+    end if
+
+  if (.not.(4*n_col <= size(work))) then
+    deallocate(aux)
+  endif
+
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+
+end subroutine amg_z_jac_solver_apply_vect

amgprec/impl/solver/amg_z_jac_solver_bld.f90

@@ -0,0 +1,125 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_z_jac_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+  
+  use psb_base_mod
+  use amg_z_jac_solver, amg_protect_name => amg_z_jac_solver_bld
+
+  Implicit None
+
+  ! Arguments
+  type(psb_zspmat_type), intent(in), target           :: a
+  Type(psb_desc_type), Intent(inout)                  :: desc_a 
+  class(amg_z_jac_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
+  ! Local variables
+  integer(psb_ipk_) :: n_row,n_col, nrow_a, nztota
+  complex(psb_dpk_), pointer :: ww(:), aux(:), tx(:),ty(:)
+  complex(psb_dpk_), allocatable :: tdb(:)
+  type(psb_z_csr_sparse_mat) :: tcsr
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: np, me, i, err_act, debug_unit, debug_level
+  character(len=20)   :: name='z_jac_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'
+
+
+  n_row  = desc_a%get_local_rows()
+  nrow_a = a%get_nrows()
+  if (present(b)) then
+    info=psb_err_internal_error_
+    call psb_errpush(info,name)
+    goto 9999      
+  end if
+  call a%cp_to(tcsr)
+  call sv%a%mv_from(tcsr)
+  if (present(amold)) call sv%a%cscnv(info,mold=amold)
+  
+  sv%d = a%get_diag(info)
+  if (info == psb_success_) call psb_realloc(n_row,sv%d,info)
+  if (present(b)) then 
+    tdb=b%get_diag(info)
+    if (size(tdb)+nrow_a > n_row) call psb_realloc(nrow_a+size(tdb),sv%d,info)
+    if (info == psb_success_) sv%d(nrow_a+1:nrow_a+size(tdb)) = tdb(:)
+  end if
+  if (info /= psb_success_) then 
+    call psb_errpush(psb_err_from_subroutine_,name,a_err='get_diag')
+    goto 9999      
+  end if
+
+  do i=1,n_row
+    if (sv%d(i) == zzero) then 
+      sv%d(i) = zone
+    else
+      sv%d(i) = zone/sv%d(i)
+    end if
+  end do
+  allocate(sv%dv,stat=info) 
+  if (info == psb_success_) then 
+    call sv%dv%bld(sv%d)
+    if (present(vmold)) call sv%dv%cnv(vmold)
+    call sv%dv%sync()
+  else
+    call psb_errpush(psb_err_from_subroutine_,name,& 
+         & a_err='Allocate sv%dv')
+    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_z_jac_solver_bld
+
+

amgprec/impl/solver/amg_z_jac_solver_clear_data.f90

@@ -0,0 +1,65 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_z_jac_solver_clear_data(sv,info)
+  
+  use psb_base_mod
+  use amg_z_jac_solver, amg_protect_name => amg_z_jac_solver_clear_data
+
+  Implicit None
+
+  ! Arguments
+  class(amg_z_jac_solver_type), intent(inout) :: sv
+  integer(psb_ipk_), intent(out)               :: info
+  ! Local variables
+  integer(psb_ipk_) :: err_act
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+
+  call sv%a%free()
+  call sv%dv%free(info)
+  if ((info==0).and.allocated(sv%d)) deallocate(sv%d,stat=info)
+  if (info /= 0) goto 9999
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+end subroutine amg_z_jac_solver_clear_data

amgprec/impl/solver/amg_z_jac_solver_clone.f90

@@ -0,0 +1,88 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_z_jac_solver_clone(sv,svout,info)
+  
+  use psb_base_mod
+  use amg_z_jac_solver, amg_protect_name => amg_z_jac_solver_clone
+
+  Implicit None
+
+  ! Arguments
+  class(amg_z_jac_solver_type), intent(inout)               :: sv
+  class(amg_z_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(svout, mold=sv, stat=info)
+  if (info /= 0) then 
+    info = psb_err_alloc_dealloc_
+    goto 9999 
+  end if
+
+  select type(svo => svout)
+  class is (amg_z_jac_solver_type)
+    svo%sweeps = sv%sweeps
+    svo%eps    = sv%eps
+    if (info == psb_success_) &
+         & call sv%a%clone(svo%a,info)
+    if (info == psb_success_) &
+         & call sv%dv%clone(svo%dv,info)
+    svo%d = sv%d
+    
+  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_z_jac_solver_clone

amgprec/impl/solver/amg_z_jac_solver_clone_settings.f90

@@ -0,0 +1,69 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_z_jac_solver_clone_settings(sv,svout,info)
+  
+  use psb_base_mod
+  use amg_z_jac_solver, amg_protect_name =>  amg_z_jac_solver_clone_settings
+  Implicit None
+  ! Arguments
+  class(amg_z_jac_solver_type), intent(inout) :: sv
+  class(amg_z_base_solver_type), intent(inout) :: svout
+  integer(psb_ipk_), intent(out)                 :: info
+  integer(psb_ipk_)  :: err_act
+  character(len=20) :: name='z_jac_solver_clone_settings'
+
+  call psb_erractionsave(err_act)
+
+  select type(svout)
+  class is(amg_z_jac_solver_type)
+    svout%sweeps = sv%sweeps
+    svout%eps    = sv%eps
+    
+  class default    
+    info = psb_err_internal_error_
+    call psb_errpush(info,name)
+    goto 9999 
+  end select
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+end subroutine amg_z_jac_solver_clone_settings

amgprec/impl/solver/amg_z_jac_solver_cnv.f90

@@ -0,0 +1,72 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_z_jac_solver_cnv(sv,info,amold,vmold,imold)
+
+  use psb_base_mod
+  use amg_z_jac_solver, amg_protect_name => amg_z_jac_solver_cnv
+
+  Implicit None
+
+  ! Arguments
+  class(amg_z_jac_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
+  ! Local variables
+  integer(psb_ipk_) :: err_act, debug_unit, debug_level
+  character(len=20) :: name='z_jac_solver_cnv', ch_err
+
+  info=psb_success_
+  call psb_erractionsave(err_act)
+  debug_unit  = psb_get_debug_unit()
+  debug_level = psb_get_debug_level()
+
+  if (present(amold)) call sv%a%cscnv(info,mold=amold)
+  if ((info==0).and.present(vmold)) call sv%dv%cnv(mold=vmold)
+
+  if (debug_level >= psb_debug_outer_) &
+       & write(debug_unit,*) trim(name),' end'
+
+  call psb_erractionrestore(err_act)
+  return
+
+9999 call psb_error_handler(err_act)
+
+  return
+end subroutine amg_z_jac_solver_cnv

amgprec/impl/solver/amg_z_jac_solver_dmp.f90

@@ -0,0 +1,107 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_z_jac_solver_dmp(sv,desc,level,info,prefix,head,solver,global_num)
+
+  use psb_base_mod
+  use amg_z_jac_solver, amg_protect_name => amg_z_jac_solver_dmp
+  implicit none 
+  class(amg_z_jac_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
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: iam, np
+  character(len=80)   :: prefix_
+  character(len=120)  :: fname ! len should be at least 20 more than
+  logical :: solver_, global_num_
+  integer(psb_lpk_), allocatable :: iv(:)
+  !  len of prefix_ 
+
+  info = 0
+
+  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
+
+
+  if (solver_) then 
+    if (present(prefix)) then 
+      prefix_ = trim(prefix(1:min(len(prefix),len(prefix_))))
+    else
+      prefix_ = "dump_slv_z"
+    end if
+    lname = len_trim(prefix_)
+    fname = trim(prefix_)
+    write(fname(lname+1:lname+5),'(a,i3.3)') '_p',iam
+    lname = lname + 5
+    
+    if (global_num_) then
+      iv = desc%get_global_indices(owned=.false.)      
+
+      write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_nd.mtx'
+      if (sv%a%is_asb()) &
+           & call sv%a%print(fname,head=head,iv=iv)
+      write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_diag.mtx'
+      if (allocated(sv%dv)) &
+           & call psb_geprt(fname,sv%dv%v%v,head=head)
+      
+    else
+
+      write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_nd.mtx'
+      if (sv%a%is_asb()) &
+           & call sv%a%print(fname,head=head)
+      write(fname(lname+1:),'(a,i3.3,a)')'_l',level,'_diag.mtx'
+      if (allocated(sv%dv)) &
+           & call psb_geprt(fname,sv%dv%v%v,head=head)
+    end if
+  end if
+
+end subroutine amg_z_jac_solver_dmp

amgprec/impl/solver/amg_z_l1_jac_solver_bld.f90

@@ -0,0 +1,128 @@
+!  
+!   
+!                             AMG4PSBLAS version 1.0
+!    Algebraic Multigrid Package
+!               based on PSBLAS (Parallel Sparse BLAS version 3.7)
+!    
+!    (C) Copyright 2021 
+!  
+!        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:
+!      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_z_l1_jac_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
+  
+  use psb_base_mod
+  use amg_z_jac_solver, amg_protect_name => amg_z_l1_jac_solver_bld
+
+  Implicit None
+
+  ! Arguments
+  type(psb_zspmat_type), intent(in), target           :: a
+  Type(psb_desc_type), Intent(inout)                  :: desc_a 
+  class(amg_z_l1_jac_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
+  ! Local variables
+  integer(psb_ipk_) :: n_row,n_col, nrow_a, nztota
+  complex(psb_dpk_), allocatable :: tdb(:), tx(:),ty(:)
+  type(psb_z_csr_sparse_mat) :: tcsr
+  type(psb_ctxt_type) :: ctxt
+  integer(psb_ipk_)   :: np, me, i, err_act, debug_unit, debug_level
+  character(len=20)   :: name='z_l1_jac_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'
+
+
+  n_row  = desc_a%get_local_rows()
+  nrow_a = a%get_nrows()
+  if (present(b)) then
+    info=psb_err_internal_error_
+    call psb_errpush(info,name)
+    goto 9999      
+  end if
+    
+  call a%cp_to(tcsr)
+  call sv%a%mv_from(tcsr)
+  if (present(amold)) call sv%a%cscnv(info,mold=amold)
+  
+  tx   = a%get_diag(info)
+  sv%d = a%arwsum(info)
+  sv%d(:) = sv%d(:) - abs(tx(:)) + tx(:) 
+  if (info == psb_success_) call psb_realloc(n_row,sv%d,info)
+  if (present(b)) then 
+    tdb=b%arwsum(info)
+    ty =b%get_diag(info)
+    if (size(tdb)+nrow_a > n_row) call psb_realloc(nrow_a+size(tdb),sv%d,info)
+    if (info == psb_success_) sv%d(nrow_a+1:nrow_a+size(tdb)) = tdb(:) - abs(ty(:)) + ty(:)
+  end if
+  if (info /= psb_success_) then 
+    call psb_errpush(psb_err_from_subroutine_,name,a_err='get_diag')
+    goto 9999      
+  end if
+
+  do i=1,n_row
+    if (sv%d(i) == zzero) then 
+      sv%d(i) = zone
+    else
+      sv%d(i) = zone/sv%d(i)
+    end if
+  end do
+  allocate(sv%dv,stat=info) 
+  if (info == psb_success_) then 
+    call sv%dv%bld(sv%d)
+    if (present(vmold)) call sv%dv%cnv(vmold)
+    call sv%dv%sync()
+  else
+    call psb_errpush(psb_err_from_subroutine_,name,& 
+         & a_err='Allocate sv%dv')
+    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_z_l1_jac_solver_bld
+
+

samples/advanced/fileread/runs/amg_dfs.inp

@@ -5,7 +5,7 @@ NONE                        ! Initial guess
 amg_sol.mtx                 ! Reference solution
 MM                          ! File format: MatrixMarket or Harwell-Boeing
 CSR                         ! Storage format: CSR COO JAD 
-GRAPH                       ! PART (partition method): BLOCK GRAPH
+GRAPH			    ! PART (partition method): BLOCK GRAPH
 CG                          ! Iterative method: BiCGSTAB BiCGSTABL BiCG CG CGS FCG GCR RGMRES
 2                           ! ISTOPC
 00500                       ! ITMAX

samples/advanced/pdegen/amg_d_pde3d.F90

@@ -288,6 +288,8 @@ program amg_d_pde3d
     call prec%set('sub_solve',       p_choice%solve,   info)
     if (psb_toupper(p_choice%solve)=='MUMPS') &
          & call prec%set('mumps_loc_glob','local_solver',info)
+    if ((psb_toupper(p_choice%solve)=='JACOBI').or.(psb_toupper(p_choice%solve)=='L1-JACOBI')) &
+         & call prec%set('solver_sweeps',8,info)
     call prec%set('sub_fillin',      p_choice%fill,    info)
     call prec%set('sub_iluthrs',     p_choice%thr,     info)
 

samples/advanced/pdegen/runs/amg_pde3d.inp

@@ -1,6 +1,6 @@
 %%%%%%%%%%%  General  arguments % Lines starting with % are ignored.
 CSR                         ! Storage format CSR COO JAD
-0200                        ! IDIM; domain size. Linear system size is IDIM**3
+0040                        ! IDIM; domain size. Linear system size is IDIM**3
 CONST                       ! PDECOEFF: CONST, EXP, GAUSS Coefficients of the PDE
 BICGSTAB                    ! Iterative method: BiCGSTAB BiCGSTABL BiCG CG CGS FCG GCR RGMRES
 2                           ! ISTOPC
@@ -10,14 +10,14 @@ BICGSTAB                    ! Iterative method: BiCGSTAB BiCGSTABL BiCG CG CGS F
 1.d-6                       ! EPS
 %%%%%%%%%%%  Main preconditioner choices %%%%%%%%%%%%%%%%
 ML-VBM-VCYCLE-FBGS-D-BJAC       ! Longer descriptive name for preconditioner (up to 20 chars)
-ML                          ! Preconditioner type: NONE JACOBI GS FBGS BJAC AS ML
+BJAC                        ! Preconditioner type: NONE JACOBI GS FBGS BJAC AS ML
 %%%%%%%%%%%  First smoother (for all levels but coarsest) %%%%%%%%%%%%%%%%
-FBGS                        ! Smoother type JACOBI FBGS GS BWGS BJAC AS. For 1-level, repeats previous.
+BJAC                        ! Smoother type JACOBI FBGS GS BWGS BJAC AS. For 1-level, repeats previous.
 1                           ! Number of sweeps for smoother
 0                           ! Number of overlap layers for AS preconditioner
 HALO                        ! AS restriction operator: NONE HALO
 NONE                        ! AS prolongation operator: NONE SUM AVG
-INVK                        ! Subdomain solver for BJAC/AS: JACOBI GS BGS ILU ILUT MILU MUMPS SLU UMF
+JACOBI                      ! Subdomain solver for BJAC/AS: JACOBI GS BGS ILU ILUT MILU MUMPS SLU UMF
 LLK                         ! AINV variant
 0                           ! Fill level P for ILU(P) and ILU(T,P)
 1                           ! Inverse Fill level P for INVK