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psblas3/base/serial/psb_dcsrp.f90

165 lines
5.5 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.
!!$
!!$
! File: psb_dcsrp.f90
!
!
! Subroutine: psb_dcsrp
! Apply a right permutation to a sparse matrix, i.e. permute the column
! indices.
!
! Arguments:
! trans - character. Whether iperm or its transpose
! should be applied
! iperm - integer, dimension(:) A permutation vector; its size
! must be either N_ROW or N_COL
! a - type(psb_dspmat_type). The matrix to be permuted
! info - integer. Eventually returns an error code
subroutine psb_dcsrp(trans,iperm,a, info)
use psb_serial_mod, psb_protect_name => psb_dcsrp
use psb_const_mod
! implicit none
interface dcsrp
subroutine dcsrp(trans,m,n,fida,descra,ia1,ia2,&
& infoa,p,work,lwork,ierror)
integer, intent(in) :: m, n, lwork
integer, intent(out) :: ierror
character, intent(in) :: trans
double precision, intent(inout) :: work(*)
integer, intent(in) :: p(*)
integer, intent(inout) :: ia1(*), ia2(*), infoa(*)
character, intent(in) :: fida*5, descra*11
end subroutine dcsrp
end interface
interface isaperm
logical function isaperm(n,ip)
integer, intent(in) :: n
integer, intent(inout) :: ip(*)
end function isaperm
end interface
!...parameters....
type(psb_dspmat_type), intent(inout) :: a
integer, intent(inout) :: iperm(:), info
character, intent(in) :: trans
!....locals....
integer,allocatable :: ipt(:)
integer :: i, n_col,l_dcsdp, ipsize
real(kind(1.d0)), allocatable :: work_dcsdp(:)
integer :: n_row,err_act, int_err(5)
character(len=20) :: name, char_err
n_row = psb_get_sp_nrows(a)
n_col = psb_get_sp_ncols(a)
if(psb_get_errstatus() /= 0) return
info=0
call psb_erractionsave(err_act)
name = 'psd_csrp'
ipsize = size(iperm)
if (.not.((ipsize == n_col).or.(ipsize == n_row) )) then
info = 35
int_err(1) = 1
int_err(2) = ipsize
call psb_errpush(info,name,int_err)
goto 9999
else
if (.not.isaperm(ipsize,iperm)) then
info = 70
int_err(1) = 1
call psb_errpush(info,name,int_err)
goto 9999
endif
endif
l_dcsdp = (n_col)
call psb_realloc(l_dcsdp,work_dcsdp,info)
call psb_realloc(n_col,ipt,info)
if(info /= psb_no_err_) then
info=4010
char_err='psrealloc'
call psb_errpush(info,name,a_err=char_err)
goto 9999
end if
if (ipsize == n_col) then
do i=1, n_col
ipt(i) = iperm(i)
enddo
else
do i=1, n_row
ipt(i) = iperm(i)
enddo
do i=n_row+1,n_col
ipt(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????
call dcsrp(trans,n_row,n_col,a%fida,a%descra,a%ia1,a%ia2,a%infoa,&
& ipt,work_dcsdp,size(work_dcsdp),info)
if(info /= psb_no_err_) then
info=4010
char_err='dcsrp'
call psb_errpush(info,name,a_err=char_err)
goto 9999
end if
deallocate(ipt,work_dcsdp,stat=info)
if(info /= psb_no_err_) then
info=4010
char_err='Deallocate'
call psb_errpush(info,name,a_err=char_err)
goto 9999
end if
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_dcsrp