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psblas3/base/tools/psb_cdren.f90

160 lines
5.6 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.
!
!
! File: psb_cdren.f90
!
! WARNING: this routine is almost certainly obsolete. Must be reviewed.
!
! Subroutine: psb_cdren
! Updates a communication descriptor according to a renumbering scheme.
!
! Arguments:
! trans - character. Whether iperm or its transpose
! should be applied.
! iperm - integer(psb_ipk_),dimension(:). The renumbering scheme.
! desc_a - type(psb_desc_type). The communication descriptor
! to be updated.
! info - integer. Return code
!
subroutine psb_cdren(trans,iperm,desc_a,info)
use psb_base_mod, psb_protect_name => psb_cdren
use psi_mod
implicit none
!...parameters....
type(psb_desc_type), intent(inout) :: desc_a
integer(psb_ipk_), intent(inout) :: iperm(:)
character, intent(in) :: trans
integer(psb_ipk_), intent(out) :: info
!....locals....
integer(psb_ipk_) :: i,j,np,me, n_col, kh, nh
integer(psb_ipk_) :: dectype
type(psb_ctxt_type) :: ictxt
integer(psb_ipk_) :: n_row, err_act
integer(psb_ipk_) :: debug_level, debug_unit
character(len=20) :: name
if(psb_get_errstatus() /= 0) return
info=psb_success_
call psb_erractionsave(err_act)
name = 'psb_cdren'
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
ictxt = desc_a%get_context()
dectype = desc_a%get_dectype()
n_row = desc_a%get_local_rows()
n_col = desc_a%get_local_cols()
! check on blacs grid
call psb_info(ictxt, me, np)
if (np == -1) then
info = psb_err_context_error_
call psb_errpush(info,name)
goto 9999
endif
if (.not.psb_is_asb_desc(desc_a)) then
info = psb_err_invalid_cd_state_
call psb_errpush(info,name,i_err=(/dectype/))
goto 9999
endif
if (iperm(1) /= 0) then
if (.not.psb_isaperm(n_row,iperm)) then
info = 610
call psb_errpush(info,name,i_err=(/iperm(1)/))
goto 9999
endif
endif
!check on errors encountered in psdspins
if ((iperm(1) /= 0)) then
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': here we go with ',iperm(1)
call psb_ensure_size(n_col,desc_a%lprm,info)
if (psb_toupper(trans) == 'N') then
do i=1, n_row
desc_a%lprm(iperm(i)) = i
enddo
do i=n_row+1,n_col
desc_a%lprm(i) = i
enddo
else if (psb_toupper(trans) == 'T') then
do i=1, n_row
desc_a%lprm(i) = iperm(i)
enddo
do i=n_row+1,n_col
desc_a%lprm(i) = i
enddo
endif
! crossed fingers.....
! fix glob_to_loc/loc_to_glob mappings, then indices lists
! hmm, maybe we should just move all of this onto a different level,
! have a specialized subroutine, and do it in the solver context????
if (allocated(desc_a%halo_index)) &
& call psi_renum_index(desc_a%lprm,desc_a%halo_index,info)
if (allocated(desc_a%ovrlap_index)) &
& call psi_renum_index(desc_a%lprm,desc_a%ovrlap_index,info)
if (allocated(desc_a%ovr_mst_idx)) &
& call psi_renum_index(desc_a%lprm,desc_a%ovr_mst_idx,info)
if (allocated(desc_a%ext_index)) &
& call psi_renum_index(desc_a%lprm,desc_a%ext_index,info)
do i=1, size(desc_a%ovrlap_elem,1)
desc_a%ovrlap_elem(i,1) = desc_a%lprm(desc_a%ovrlap_elem(i,1))
end do
do i=1, size(desc_a%bnd_elem)
desc_a%bnd_elem(i) = desc_a%lprm(desc_a%bnd_elem(i))
end do
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': done renumbering'
else
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': nothing to be done'
endif
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': end'
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(ictxt,err_act)
return
end subroutine psb_cdren