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amg4psblas/amgprec/amg_s_id_solver.f90

210 lines
7.5 KiB
Fortran

!
!
! 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.
!
!
!
!
!
! Identity solver. Reference for nullprec.
!
!
module amg_s_id_solver
use amg_s_base_solver_mod
type, extends(amg_s_base_solver_type) :: amg_s_id_solver_type
contains
procedure, pass(sv) :: build => s_id_solver_bld
procedure, pass(sv) :: clone => amg_s_id_solver_clone
procedure, pass(sv) :: apply_v => amg_s_id_solver_apply_vect
procedure, pass(sv) :: apply_a => amg_s_id_solver_apply
procedure, pass(sv) :: free => s_id_solver_free
procedure, pass(sv) :: descr => s_id_solver_descr
procedure, nopass :: get_fmt => s_id_solver_get_fmt
procedure, nopass :: get_id => s_id_solver_get_id
end type amg_s_id_solver_type
private :: s_id_solver_bld, &
& s_id_solver_free, s_id_solver_get_fmt, &
& s_id_solver_descr, s_id_solver_get_id
interface
subroutine amg_s_id_solver_apply_vect(alpha,sv,x,beta,y,desc_data,&
& trans,work,wv,info,init,initu)
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_id_solver_type, psb_ipk_
type(psb_desc_type), intent(in) :: desc_data
class(amg_s_id_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_id_solver_apply_vect
end interface
interface
subroutine amg_s_id_solver_apply(alpha,sv,x,beta,y,desc_data,&
& trans,work,info,init,initu)
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_id_solver_type, psb_ipk_
type(psb_desc_type), intent(in) :: desc_data
class(amg_s_id_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_id_solver_apply
end interface
interface
subroutine amg_s_id_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_id_solver_type, psb_ipk_
Implicit None
! Arguments
class(amg_s_id_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_id_solver_clone
end interface
contains
subroutine s_id_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
Implicit None
! Arguments
type(psb_sspmat_type), intent(in), target :: a
Type(psb_desc_type), Intent(inout) :: desc_a
class(amg_s_id_solver_type), intent(inout) :: sv
integer(psb_ipk_), intent(out) :: info
type(psb_sspmat_type), intent(in), target, optional :: b
class(psb_s_base_sparse_mat), intent(in), optional :: amold
class(psb_s_base_vect_type), intent(in), optional :: vmold
class(psb_i_base_vect_type), intent(in), optional :: imold
! Local variables
integer(psb_ipk_) :: n_row,n_col, nrow_a, nztota
real(psb_spk_), pointer :: ww(:), aux(:), tx(:),ty(:)
integer(psb_ipk_) :: i, err_act, debug_unit, debug_level
character(len=20) :: name='s_id_solver_bld', ch_err
info=psb_success_
return
end subroutine s_id_solver_bld
subroutine s_id_solver_free(sv,info)
Implicit None
! Arguments
class(amg_s_id_solver_type), intent(inout) :: sv
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_) :: err_act
character(len=20) :: name='s_id_solver_free'
info = psb_success_
return
end subroutine s_id_solver_free
subroutine s_id_solver_descr(sv,info,iout,coarse,prefix)
Implicit None
! Arguments
class(amg_s_id_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_id_solver_descr'
integer(psb_ipk_) :: iout_
character(1024) :: prefix_
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
write(iout_,*) trim(prefix_), ' Identity local solver '
return
end subroutine s_id_solver_descr
function s_id_solver_get_fmt() result(val)
implicit none
character(len=32) :: val
val = "Identity solver"
end function s_id_solver_get_fmt
function s_id_solver_get_id() result(val)
implicit none
integer(psb_ipk_) :: val
val = amg_f_none_
end function s_id_solver_get_id
end module amg_s_id_solver