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