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psblas3/prec/impl/psb_z_diagprec_impl.f90

294 lines
8.6 KiB
Fortran

!
! Parallel Sparse BLAS version 3.5
! (C) Copyright 2006-2018
! Salvatore Filippone
! Alfredo Buttari
!
! 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 PSBLAS 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 PSBLAS 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 psb_z_diag_dump(prec,info,prefix,head)
use psb_base_mod
use psb_z_diagprec, psb_protect_name => psb_z_diag_dump
implicit none
class(psb_z_diag_prec_type), intent(in) :: prec
integer(psb_ipk_), intent(out) :: info
character(len=*), intent(in), optional :: prefix,head
integer(psb_ipk_) :: i, j, il1, iln, lname, lev
type(psb_ctxt_type) :: ctxt
integer(psb_ipk_) :: iam, np
character(len=80) :: prefix_
character(len=120) :: fname ! len should be at least 20 more than
! len of prefix_
info = 0
ctxt = prec%get_ctxt()
call psb_info(ctxt,iam,np)
if (present(prefix)) then
prefix_ = trim(prefix(1:min(len(prefix),len(prefix_))))
else
prefix_ = "dump_diag_z"
end if
lname = len_trim(prefix_)
fname = trim(prefix_)
write(fname(lname+1:lname+5),'(a,i3.3)') '_p',iam
write(fname(lname+1:),'(a,a)')'_diag.mtx'
if (allocated(prec%dv)) &
& call psb_geprt(fname,prec%dv%v%v,head=head)
end subroutine psb_z_diag_dump
subroutine psb_z_diag_apply_vect(alpha,prec,x,beta,y,desc_data,info,trans,work)
use psb_base_mod
use psb_z_diagprec, psb_protect_name => psb_z_diag_apply_vect
implicit none
type(psb_desc_type),intent(in) :: desc_data
class(psb_z_diag_prec_type), intent(inout) :: prec
type(psb_z_vect_type),intent(inout) :: x
complex(psb_dpk_),intent(in) :: alpha, beta
type(psb_z_vect_type),intent(inout) :: y
integer(psb_ipk_), intent(out) :: info
character(len=1), optional :: trans
complex(psb_dpk_),intent(inout), optional, target :: work(:)
integer(psb_ipk_) :: err_act, nrow, ierr(5)
character(len=20) :: name='z_diag_prec_apply'
complex(psb_dpk_), pointer :: ww(:)
class(psb_z_base_vect_type), allocatable :: dw
call psb_erractionsave(err_act)
!
! This is the base version and we should throw an error.
! Or should it be the DIAG preonditioner???
!
info = psb_success_
nrow = desc_data%get_local_rows()
if (x%get_nrows() < nrow) then
info = 36; ierr(1) = 2; ierr(2) = nrow;
call psb_errpush(info,name,i_err=ierr)
goto 9999
end if
if (y%get_nrows() < nrow) then
info = 36; ierr(1) = 3; ierr(2) = nrow;
call psb_errpush(info,name,i_err=ierr)
goto 9999
end if
if (.not.allocated(prec%d)) then
info = 1124
call psb_errpush(info,name,a_err="preconditioner: D")
goto 9999
end if
if (size(prec%d) < nrow) then
info = 1124
call psb_errpush(info,name,a_err="preconditioner: D")
goto 9999
end if
call y%mlt(alpha,prec%dv,x,beta,info,conjgx=trans)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_, &
& name,a_err='vect%mlt')
goto 9999
end if
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine psb_z_diag_apply_vect
subroutine psb_z_diag_apply(alpha,prec,x,beta,y,desc_data,info,trans,work)
use psb_base_mod
use psb_z_diagprec, psb_protect_name => psb_z_diag_apply
implicit none
type(psb_desc_type),intent(in) :: desc_data
class(psb_z_diag_prec_type), intent(inout) :: prec
complex(psb_dpk_),intent(inout) :: x(:)
complex(psb_dpk_),intent(in) :: alpha, beta
complex(psb_dpk_),intent(inout) :: y(:)
integer(psb_ipk_), intent(out) :: info
character(len=1), optional :: trans
complex(psb_dpk_),intent(inout), optional, target :: work(:)
integer(psb_ipk_) :: err_act, nrow, ierr(5)
character :: trans_
character(len=20) :: name='z_diag_prec_apply'
complex(psb_dpk_), pointer :: ww(:)
call psb_erractionsave(err_act)
info = psb_success_
nrow = desc_data%get_local_rows()
if (size(x) < nrow) then
info = 36; ierr(1) = 2; ierr(2) = nrow;
call psb_errpush(info,name,i_err=ierr)
goto 9999
end if
if (size(y) < nrow) then
info = 36; ierr(1) = 3; ierr(2) = nrow;
call psb_errpush(info,name,i_err=ierr)
goto 9999
end if
if (.not.allocated(prec%d)) then
info = 1124
call psb_errpush(info,name,a_err="preconditioner: D")
goto 9999
end if
if (size(prec%d) < nrow) then
info = 1124
call psb_errpush(info,name,a_err="preconditioner: D")
goto 9999
end if
if (present(trans)) then
trans_ = psb_toupper(trans)
else
trans_='N'
end if
select case(trans_)
case('N')
case('T','C')
case default
info=psb_err_iarg_invalid_i_
ierr(1) = 6
call psb_errpush(info,name,i_err=ierr,a_err=trans_)
goto 9999
end select
if (size(work) >= size(x)) then
ww => work
else
allocate(ww(size(x)),stat=info)
if (info /= psb_success_) then
ierr(1) = size(x)
call psb_errpush(psb_err_alloc_request_,name,&
& i_err=ierr,a_err='complex(psb_dpk_)')
goto 9999
end if
end if
if (trans_ == 'C') then
ww(1:nrow) = x(1:nrow)*conjg(prec%d(1:nrow))
else
ww(1:nrow) = x(1:nrow)*prec%d(1:nrow)
endif
call psb_geaxpby(alpha,ww,beta,y,desc_data,info)
if (size(work) < size(x)) then
deallocate(ww,stat=info)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='Deallocate')
goto 9999
end if
end if
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine psb_z_diag_apply
subroutine psb_z_diag_precbld(a,desc_a,prec,info,amold,vmold,imold)
use psb_base_mod
use psb_z_diagprec, psb_protect_name => psb_z_diag_precbld
Implicit None
type(psb_zspmat_type), intent(in), target :: a
type(psb_desc_type), intent(inout), target :: desc_a
class(psb_z_diag_prec_type),intent(inout) :: prec
integer(psb_ipk_), intent(out) :: info
class(psb_z_base_sparse_mat), intent(in), optional :: amold
class(psb_z_base_vect_type), intent(in), optional :: vmold
class(psb_i_base_vect_type), intent(in), optional :: imold
integer(psb_ipk_) :: err_act, nrow,ncol,i
character(len=20) :: name='z_diag_precbld'
call psb_erractionsave(err_act)
info = psb_success_
call prec%set_ctxt(desc_a%get_ctxt())
nrow = desc_a%get_local_rows()
ncol = desc_a%get_local_cols()
prec%d=a%get_diag(info)
if (info /= psb_success_) then
info = psb_err_from_subroutine_
call psb_errpush(info,name, a_err='get_diag')
goto 9999
end if
call psb_realloc(ncol,prec%d,info)
!$omp parallel do private(i)
do i=1,nrow
if (prec%d(i) == dzero) then
prec%d(i) = zone
else
prec%d(i) = zone/prec%d(i)
endif
end do
!$omp parallel do private(i)
do i=nrow+1,ncol
prec%d(i) = zone
end do
allocate(prec%dv,stat=info)
if (info == 0) then
if (present(vmold)) then
allocate(prec%dv%v,mold=vmold,stat=info)
else
allocate(psb_z_base_vect_type :: prec%dv%v,stat=info)
end if
end if
if (info == 0) then
call prec%dv%bld(prec%d)
else
write(0,*) 'Error on precbld ',info
end if
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine psb_z_diag_precbld