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amg4psblas/amgprec/amg_c_diag_solver.f90

413 lines
15 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.
!
!
!
! File: amg_c_diag_solver_mod.f90
!
! Module: amg_c_diag_solver_mod
!
! This module defines:
! - the amg_c_diag_solver_type data structure containing the
! simple diagonal solver. This extracts the main diagonal of a matrix
! and precomputes its inverse. Combined with a Jacobi "smoother" generates
! what are commonly known as the classic Jacobi iterations
!
module amg_c_diag_solver
use amg_c_base_solver_mod
type, extends(amg_c_base_solver_type) :: amg_c_diag_solver_type
type(psb_c_vect_type), allocatable :: dv
complex(psb_spk_), allocatable :: d(:)
contains
procedure, pass(sv) :: dump => amg_c_diag_solver_dmp
procedure, pass(sv) :: build => amg_c_diag_solver_bld
procedure, pass(sv) :: cnv => amg_c_diag_solver_cnv
procedure, pass(sv) :: clone => amg_c_diag_solver_clone
procedure, pass(sv) :: clear_data => amg_c_diag_solver_clear_data
procedure, pass(sv) :: apply_v => amg_c_diag_solver_apply_vect
procedure, pass(sv) :: apply_a => amg_c_diag_solver_apply
procedure, pass(sv) :: free => c_diag_solver_free
procedure, pass(sv) :: descr => c_diag_solver_descr
procedure, pass(sv) :: sizeof => c_diag_solver_sizeof
procedure, pass(sv) :: get_nzeros => c_diag_solver_get_nzeros
procedure, nopass :: get_fmt => c_diag_solver_get_fmt
procedure, nopass :: get_id => c_diag_solver_get_id
end type amg_c_diag_solver_type
private :: c_diag_solver_free, c_diag_solver_descr, &
& c_diag_solver_sizeof, c_diag_solver_get_nzeros, &
& c_diag_solver_get_fmt, c_diag_solver_get_id
interface
subroutine amg_c_diag_solver_apply_vect(alpha,sv,x,beta,y,desc_data,&
& trans,work,wv,info,init,initu)
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_diag_solver_type, psb_ipk_
type(psb_desc_type), intent(in) :: desc_data
class(amg_c_diag_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_diag_solver_apply_vect
end interface
interface
subroutine amg_c_diag_solver_apply(alpha,sv,x,beta,y,desc_data,&
& trans,work,info,init,initu)
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_diag_solver_type, psb_ipk_
type(psb_desc_type), intent(in) :: desc_data
class(amg_c_diag_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_diag_solver_apply
end interface
interface
subroutine amg_c_diag_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
import :: psb_desc_type, psb_cspmat_type, psb_c_base_sparse_mat, &
& psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
& amg_c_diag_solver_type, psb_ipk_, psb_i_base_vect_type
type(psb_cspmat_type), intent(in), target :: a
Type(psb_desc_type), Intent(inout) :: desc_a
class(amg_c_diag_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_diag_solver_bld
end interface
interface
subroutine amg_c_diag_solver_cnv(sv,info,amold,vmold,imold)
import :: psb_c_base_sparse_mat, psb_c_base_vect_type, psb_spk_, &
& amg_c_diag_solver_type, psb_ipk_, psb_i_base_vect_type
class(amg_c_diag_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_diag_solver_cnv
end interface
interface
subroutine amg_c_diag_solver_dmp(sv,desc,level,info,prefix,head,solver,global_num)
import :: psb_desc_type, amg_c_diag_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_diag_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_diag_solver_dmp
end interface
interface
subroutine amg_c_diag_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_diag_solver_type, psb_ipk_
Implicit None
! Arguments
class(amg_c_diag_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_diag_solver_clone
end interface
interface
subroutine amg_c_diag_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_diag_solver_type, psb_ipk_
Implicit None
! Arguments
class(amg_c_diag_solver_type), intent(inout) :: sv
integer(psb_ipk_), intent(out) :: info
end subroutine amg_c_diag_solver_clear_data
end interface
contains
subroutine c_diag_solver_free(sv,info)
Implicit None
! Arguments
class(amg_c_diag_solver_type), intent(inout) :: sv
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_) :: err_act
character(len=20) :: name='c_diag_solver_free'
call psb_erractionsave(err_act)
info = psb_success_
if (allocated(sv%dv)) call sv%dv%free(info)
if (allocated(sv%d)) then
deallocate(sv%d,stat=info)
if (info /= psb_success_) then
info = psb_err_alloc_dealloc_
call psb_errpush(info,name)
goto 9999
end if
end if
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine c_diag_solver_free
subroutine c_diag_solver_descr(sv,info,iout,coarse,prefix)
Implicit None
! Arguments
class(amg_c_diag_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_diag_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_), ' Diagonal local solver '
return
end subroutine c_diag_solver_descr
function c_diag_solver_sizeof(sv) result(val)
implicit none
! Arguments
class(amg_c_diag_solver_type), intent(in) :: sv
integer(psb_epk_) :: val
integer(psb_ipk_) :: i
val = 0
if (allocated(sv%dv)) val = val + sv%dv%sizeof()
return
end function c_diag_solver_sizeof
function c_diag_solver_get_nzeros(sv) result(val)
implicit none
! Arguments
class(amg_c_diag_solver_type), intent(in) :: sv
integer(psb_epk_) :: val
integer(psb_ipk_) :: i
val = 0
if (allocated(sv%dv)) val = val + sv%dv%get_nrows()
return
end function c_diag_solver_get_nzeros
function c_diag_solver_get_fmt() result(val)
implicit none
character(len=32) :: val
val = "Diag solver"
end function c_diag_solver_get_fmt
function c_diag_solver_get_id() result(val)
implicit none
integer(psb_ipk_) :: val
val = amg_diag_scale_
end function c_diag_solver_get_id
end module amg_c_diag_solver
!
! Module: amg_c_l1_diag_solver_mod
!
! This module defines:
! - the amg_c_l1_diag_solver_type data structure containing the
! L1 diagonal solver.
! The solver is defined as a diagonal containing in each element the
! inverse of the sum of the absolute values of the matrix entries
! along the corresponding row.
! Combined with a Jacobi "smoother" generates
! what are commonly known as the L1-Jacobi iterations
!
module amg_c_l1_diag_solver
use amg_c_diag_solver
type, extends(amg_c_diag_solver_type) :: amg_c_l1_diag_solver_type
contains
procedure, pass(sv) :: dump => amg_c_l1_diag_solver_dmp
procedure, pass(sv) :: build => amg_c_l1_diag_solver_bld
procedure, pass(sv) :: descr => c_l1_diag_solver_descr
procedure, nopass :: get_fmt => c_l1_diag_solver_get_fmt
procedure, nopass :: get_id => c_l1_diag_solver_get_id
end type amg_c_l1_diag_solver_type
private :: c_l1_diag_solver_descr, &
& c_l1_diag_solver_get_fmt, c_l1_diag_solver_get_id
interface
subroutine amg_c_l1_diag_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
import :: psb_desc_type, psb_cspmat_type, psb_c_base_sparse_mat, &
& psb_c_vect_type, psb_c_base_vect_type, psb_spk_, &
& amg_c_l1_diag_solver_type, psb_ipk_, psb_i_base_vect_type
type(psb_cspmat_type), intent(in), target :: a
Type(psb_desc_type), Intent(inout) :: desc_a
class(amg_c_l1_diag_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_diag_solver_bld
end interface
interface
subroutine amg_c_l1_diag_solver_dmp(sv,desc,level,info,prefix,head,solver,global_num)
import :: psb_desc_type, amg_c_l1_diag_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_l1_diag_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_l1_diag_solver_dmp
end interface
contains
subroutine c_l1_diag_solver_descr(sv,info,iout,coarse,prefix)
Implicit None
! Arguments
class(amg_c_l1_diag_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_diag_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_), ' L1 Diagonal solver '
return
end subroutine c_l1_diag_solver_descr
function c_l1_diag_solver_get_fmt() result(val)
implicit none
character(len=32) :: val
val = "L1 Diag solver"
end function c_l1_diag_solver_get_fmt
function c_l1_diag_solver_get_id() result(val)
implicit none
integer(psb_ipk_) :: val
val = amg_l1_diag_scale_
end function c_l1_diag_solver_get_id
end module amg_c_l1_diag_solver