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psblas3/base/tools/psb_cdren.f90

215 lines
6.6 KiB
Fortran

!!$
!!$ Parallel Sparse BLAS v2.0
!!$ (C) Copyright 2006 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.
!!$
!!$
! File: psb_cdren.f90
!
! Subroutine: psb_cdren
! Updates a communication descriptor according to a renumbering scheme.
!
! Parameters:
! trans - character. Whether iperm or its transpose should be applied.
! iperm - integer,dimension(:). The renumbering scheme.
! desc_a - type(<psb_desc_type>). The communication descriptor to be updated.
! info - integer. Eventually returns an error code.
!
subroutine psb_cdren(trans,iperm,desc_a,info)
use psb_descriptor_type
use psb_const_mod
use psb_error_mod
use psb_penv_mod
use psb_string_mod
use psb_serial_mod
implicit none
!...parameters....
type(psb_desc_type), intent(inout) :: desc_a
integer, intent(inout) :: iperm(:)
character, intent(in) :: trans
integer, intent(out) :: info
!....locals....
integer :: i,j,np,me, n_col, kh, nh
integer :: dectype
integer :: ictxt,n_row, int_err(5), err_act
logical, parameter :: debug=.false.
character(len=20) :: name
if(psb_get_errstatus() /= 0) return
info=0
call psb_erractionsave(err_act)
name = 'psb_dcren'
ictxt = psb_cd_get_context(desc_a)
dectype = psb_cd_get_dectype(desc_a)
n_row = psb_cd_get_local_rows(desc_a)
n_col = psb_cd_get_local_cols(desc_a)
! check on blacs grid
call psb_info(ictxt, me, np)
if (np == -1) then
info = 2010
call psb_errpush(info,name)
goto 9999
endif
if (.not.psb_is_asb_desc(desc_a)) then
info = 600
int_err(1) = dectype
call psb_errpush(info,name,int_err)
goto 9999
endif
if (iperm(1) /= 0) then
if (.not.isaperm(n_row,iperm)) then
info = 610
int_err(1) = iperm(1)
call psb_errpush(info,name,int_err)
goto 9999
endif
endif
if (debug) write (*, *) ' begin matrix assembly...'
!check on errors encountered in psdspins
if ((iperm(1) /= 0)) then
if (debug) write(0,*) 'spasb: here we go with ',iperm(1)
deallocate(desc_a%lprm)
allocate(desc_a%lprm(n_col))
if (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 (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 moe all of this onto a different level,
! have a specialized subroutine, and do it in the solver context????
if (debug) write(0,*) 'spasb: renumbering glob_to_loc'
do i=1, n_col
desc_a%glob_to_loc(desc_a%loc_to_glob(desc_a%lprm(i))) = i
enddo
if (debug) write(0,*) 'spasb: renumbering loc_to_glob'
do i=1,psb_cd_get_global_rows(desc_a)
j = desc_a%glob_to_loc(i)
if (j>0) then
desc_a%loc_to_glob(j) = i
endif
enddo
if (debug) write(0,*) 'spasb: renumbering halo_index'
i=1
kh=desc_a%halo_index(i)
do while (kh /= -1)
i = i+1
nh = desc_a%halo_index(i)
do j = i+1, i+nh
desc_a%halo_index(j) = &
&desc_a%lprm(desc_a%halo_index(j))
enddo
i = i + nh + 1
nh = desc_a%halo_index(i)
do j= i+1, i+nh
desc_a%halo_index(j) = &
&desc_a%lprm(desc_a%halo_index(j))
enddo
i = i + nh + 1
kh=desc_a%halo_index(i)
enddo
if (debug) write(0,*) 'spasb: renumbering ovrlap_index'
i=1
kh=desc_a%ovrlap_index(i)
do while (kh /= -1)
i = i + 1
nh = desc_a%ovrlap_index(i)
do j= i+1, i+nh
desc_a%ovrlap_index(j) = &
&desc_a%lprm(desc_a%ovrlap_index(j))
enddo
i = i + nh + 1
kh=desc_a%ovrlap_index(i)
enddo
if (debug) write(0,*) 'spasb: renumbering ovrlap_elem'
i = 1
kh=desc_a%ovrlap_elem(i)
do while (kh /= -1)
desc_a%ovrlap_elem(i) = &
&desc_a%lprm(desc_a%ovrlap_elem(i))
i = i+2
kh=desc_a%ovrlap_elem(i)
enddo
if (debug) write(0,*) 'spasb: done renumbering'
if (debug) then
write(60+me,*) 'n_row ',n_row,' n_col',n_col, ' trans: ',trans
do i=1,n_col
write(60+me,*)i, ' lprm ', desc_a%lprm(i), ' iperm',iperm(i)
enddo
i=1
kh = desc_a%halo_index(i)
do while (kh /= -1)
write(60+me,*) i, kh
i = i+1
kh = desc_a%halo_index(i)
enddo
close(60+me)
end if
!!$ iperm(1) = 0
else
!!$ allocate(desc_a%lprm(1))
!!$ desc_a%lprm(1) = 0
endif
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == act_ret) then
return
else
call psb_error(ictxt)
end if
return
end subroutine psb_cdren