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.
210 lines
6.3 KiB
Fortran
210 lines
6.3 KiB
Fortran
!
|
|
!
|
|
! MLD2P4 version 2.2
|
|
! MultiLevel Domain Decomposition Parallel Preconditioners Package
|
|
! based on PSBLAS (Parallel Sparse BLAS version 3.5)
|
|
!
|
|
! (C) Copyright 2008-2018
|
|
!
|
|
! 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 MLD2P4 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 MLD2P4 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 mld_z_gs_solver_apply_vect(alpha,sv,x,beta,y,desc_data,&
|
|
& trans,work,wv,info,init,initu)
|
|
|
|
use psb_base_mod
|
|
use mld_z_gs_solver, mld_protect_name => mld_z_gs_solver_apply_vect
|
|
implicit none
|
|
type(psb_desc_type), intent(in) :: desc_data
|
|
class(mld_z_gs_solver_type), intent(inout) :: sv
|
|
type(psb_z_vect_type),intent(inout) :: x
|
|
type(psb_z_vect_type),intent(inout) :: y
|
|
complex(psb_dpk_),intent(in) :: alpha,beta
|
|
character(len=1),intent(in) :: trans
|
|
complex(psb_dpk_),target, intent(inout) :: work(:)
|
|
type(psb_z_vect_type),intent(inout) :: wv(:)
|
|
integer(psb_ipk_), intent(out) :: info
|
|
character, intent(in), optional :: init
|
|
type(psb_z_vect_type),intent(inout), optional :: initu
|
|
|
|
integer(psb_ipk_) :: n_row,n_col, itx
|
|
complex(psb_dpk_), pointer :: ww(:), aux(:), tx(:),ty(:)
|
|
complex(psb_dpk_), allocatable :: temp(:)
|
|
integer(psb_ipk_) :: ictxt,np,me,i, err_act
|
|
character :: trans_, init_
|
|
character(len=20) :: name='z_gs_solver_apply'
|
|
|
|
call psb_erractionsave(err_act)
|
|
ictxt = desc_data%get_ctxt()
|
|
call psb_info(ictxt,me,np)
|
|
info = psb_success_
|
|
|
|
trans_ = psb_toupper(trans)
|
|
select case(trans_)
|
|
case('N')
|
|
!!$ case('T')
|
|
!!$ case('C')
|
|
case default
|
|
call psb_errpush(psb_err_iarg_invalid_i_,name)
|
|
goto 9999
|
|
end select
|
|
|
|
if (present(init)) then
|
|
init_ = psb_toupper(init)
|
|
else
|
|
init_='Z'
|
|
end if
|
|
|
|
|
|
n_row = desc_data%get_local_rows()
|
|
n_col = desc_data%get_local_cols()
|
|
|
|
|
|
if (x%get_nrows() < n_row) then
|
|
info = 36
|
|
call psb_errpush(info,name,&
|
|
& i_err=(/itwo,n_row,izero,izero,izero/))
|
|
goto 9999
|
|
end if
|
|
if (y%get_nrows() < n_row) then
|
|
info = 36
|
|
call psb_errpush(info,name,&
|
|
& i_err=(/ithree,n_row,izero,izero,izero/))
|
|
goto 9999
|
|
end if
|
|
|
|
|
|
|
|
if (n_col <= size(work)) then
|
|
ww => work(1:n_col)
|
|
if ((4*n_col+n_col) <= size(work)) then
|
|
aux => work(n_col+1:)
|
|
else
|
|
allocate(aux(4*n_col),stat=info)
|
|
endif
|
|
else
|
|
allocate(ww(n_col),aux(4*n_col),stat=info)
|
|
endif
|
|
|
|
if (info /= psb_success_) then
|
|
info=psb_err_alloc_request_
|
|
call psb_errpush(info,name,&
|
|
& i_err=(/5*n_col,izero,izero,izero,izero/),&
|
|
& a_err='complex(psb_dpk_)')
|
|
goto 9999
|
|
end if
|
|
|
|
if (size(wv) < 2) then
|
|
info = psb_err_internal_error_
|
|
call psb_errpush(info,name,&
|
|
& a_err='invalid wv size')
|
|
goto 9999
|
|
end if
|
|
|
|
associate(tw => wv(1), xit => wv(2))
|
|
|
|
select case (init_)
|
|
case('Z')
|
|
call xit%zero()
|
|
case('Y')
|
|
call psb_geaxpby(zone,y,zzero,xit,desc_data,info)
|
|
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,initu,zzero,xit,desc_data,info)
|
|
case default
|
|
call psb_errpush(psb_err_internal_error_,name,&
|
|
& a_err='wrong init to smoother_apply')
|
|
goto 9999
|
|
end select
|
|
|
|
select case(trans_)
|
|
case('N')
|
|
if (sv%eps <=dzero) then
|
|
!
|
|
! Fixed number of iterations
|
|
!
|
|
!
|
|
do itx=1,sv%sweeps
|
|
call psb_geaxpby(zone,x,zzero,tw,desc_data,info)
|
|
! Update with U. The off-diagonal block is taken care
|
|
! from the Jacobi smoother, hence this is purely local.
|
|
call psb_spmm(-zone,sv%u,xit,zone,tw,desc_data,info,doswap=.false.)
|
|
call psb_spsm(zone,sv%l,tw,zzero,xit,desc_data,info)
|
|
end do
|
|
|
|
call psb_geaxpby(alpha,xit,beta,y,desc_data,info)
|
|
|
|
else
|
|
!
|
|
! Iterations to convergence, not implemented right now.
|
|
!
|
|
info = psb_err_internal_error_
|
|
call psb_errpush(info,name,a_err='EPS>0 not implemented in GS subsolve')
|
|
goto 9999
|
|
|
|
end if
|
|
|
|
case default
|
|
info = psb_err_internal_error_
|
|
call psb_errpush(info,name,&
|
|
& a_err='Invalid TRANS in GS subsolve')
|
|
goto 9999
|
|
end select
|
|
|
|
|
|
if (info /= psb_success_) then
|
|
|
|
call psb_errpush(psb_err_internal_error_,name,&
|
|
& a_err='Error in subsolve')
|
|
goto 9999
|
|
endif
|
|
end associate
|
|
|
|
if (n_col <= size(work)) then
|
|
if ((4*n_col+n_col) <= size(work)) then
|
|
else
|
|
deallocate(aux)
|
|
endif
|
|
else
|
|
deallocate(ww,aux)
|
|
endif
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 call psb_error_handler(err_act)
|
|
|
|
return
|
|
|
|
end subroutine mld_z_gs_solver_apply_vect
|