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.
134 lines
4.1 KiB
Fortran
134 lines
4.1 KiB
Fortran
!!$
|
|
!!$ Parallel Sparse BLAS version 2.2
|
|
!!$ (C) Copyright 2006/2007/2008
|
|
!!$ Salvatore Filippone University of Rome Tor Vergata
|
|
!!$ Alfredo Buttari 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 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_ddiagsc_bld(a,desc_a,p,upd,info)
|
|
|
|
use psb_base_mod
|
|
use psb_prec_mod, psb_protect_name => psb_ddiagsc_bld
|
|
Implicit None
|
|
|
|
type(psb_d_sparse_mat), intent(in), target :: a
|
|
type(psb_desc_type), intent(in) :: desc_a
|
|
type(psb_dprec_type),intent(inout) :: p
|
|
character, intent(in) :: upd
|
|
integer, intent(out) :: info
|
|
|
|
|
|
! Local scalars
|
|
Integer :: err, n_row, n_col,I,ictxt,&
|
|
& me,np,mglob, err_act
|
|
integer :: int_err(5)
|
|
|
|
integer,parameter :: iroot=psb_root_,iout=60,ilout=40
|
|
character(len=20) :: name, ch_err
|
|
|
|
if(psb_get_errstatus() /= 0) return
|
|
info=0
|
|
err=0
|
|
call psb_erractionsave(err_act)
|
|
name = 'psb_diagsc_bld'
|
|
|
|
info = 0
|
|
int_err(1) = 0
|
|
ictxt = psb_cd_get_context(desc_a)
|
|
n_row = psb_cd_get_local_rows(desc_a)
|
|
n_col = psb_cd_get_local_cols(desc_a)
|
|
mglob = psb_cd_get_global_rows(desc_a)
|
|
|
|
call psb_info(ictxt, me, np)
|
|
|
|
! diagonal scaling
|
|
|
|
call psb_realloc(n_col,p%d,info)
|
|
if (info /= 0) then
|
|
call psb_errpush(4010,name,a_err='psb_realloc')
|
|
goto 9999
|
|
end if
|
|
|
|
!
|
|
! Retrieve the diagonal entries of the matrix A
|
|
!
|
|
call a%get_diag(p%d,info)
|
|
if(info /= 0) then
|
|
info=4010
|
|
ch_err='psb_sp_getdiag'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
!
|
|
! Copy into p%desc_data the descriptor associated to A
|
|
!
|
|
call psb_cdcpy(desc_a,p%desc_Data,info)
|
|
if (info /= 0) then
|
|
call psb_errpush(4010,name,a_err='psb_cdcpy')
|
|
goto 9999
|
|
end if
|
|
|
|
!
|
|
! The i-th diagonal entry of the preconditioner is set to one if the
|
|
! corresponding entry a_ii of the sparse matrix A is zero; otherwise
|
|
! it is set to one/a_ii
|
|
!
|
|
do i=1,n_row
|
|
if (p%d(i) == dzero) then
|
|
p%d(i) = done
|
|
else
|
|
p%d(i) = done/p%d(i)
|
|
endif
|
|
end do
|
|
|
|
!!$ if (a%pl(1) /= 0) then
|
|
!!$ !
|
|
!!$ ! Apply the same row permutation as in the sparse matrix A
|
|
!!$ !
|
|
!!$ call psb_gelp('n',a%pl,p%d,info)
|
|
!!$ if(info /= 0) then
|
|
!!$ info=4010
|
|
!!$ ch_err='psb_dgelp'
|
|
!!$ call psb_errpush(info,name,a_err=ch_err)
|
|
!!$ goto 9999
|
|
!!$ end if
|
|
!!$ endif
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 continue
|
|
call psb_erractionrestore(err_act)
|
|
if (err_act == psb_act_abort_) then
|
|
call psb_error()
|
|
return
|
|
end if
|
|
return
|
|
|
|
end subroutine psb_ddiagsc_bld
|
|
|