You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
353 lines
10 KiB
Fortran
353 lines
10 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
|
|
! 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
|