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amg4psblas/amgprec/amg_d_base_ainv_mod.f90

200 lines
7.9 KiB
Fortran

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