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psblas3/base/serial/aux/dmsrx.f90

84 lines
2.9 KiB
Fortran

!!$
!!$ Parallel Sparse BLAS version 3.0
!!$ (C) Copyright 2006, 2007, 2008, 2009, 2010, 2012
!!$ Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari CNRS-IRIT, Toulouse
!!$
!!$ 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: imsrx.f90
! Subroutine:
! Parameters:
subroutine dmsrx(n,x,indx,idir,flag)
use psb_serial_mod
use psb_ip_reord_mod
implicit none
integer(psb_ipk_) :: n,idir,flag
real(psb_dpk_) :: x(n)
integer(psb_ipk_) :: indx(n)
integer(psb_ipk_), allocatable :: iaux(:)
integer(psb_ipk_) :: iret, info, lp, k,lswap, ixswap
real(psb_dpk_) :: swap
if (n<0) then
!!$ write(psb_err_unit,*) 'Error: DMSRX: N<0'
return
endif
if (n == 0) return
if (flag == psb_sort_ovw_idx_) then
do k=1,n
indx(k) = k
enddo
end if
if (n == 1) return
allocate(iaux(0:n+1),stat=info)
if (info /= psb_success_) then
call psb_errpush(psb_err_alloc_dealloc_,r_name='dmsrx')
call psb_error()
endif
if (idir == psb_sort_up_) then
call dmsort_up(n,x,iaux,iret)
else
call dmsort_dw(n,x,iaux,iret)
end if
if (iret == 0) call psb_ip_reord(n,x,indx,iaux)
deallocate(iaux,stat=info)
if (info /= psb_success_) then
call psb_errpush(psb_err_alloc_dealloc_,r_name='dmsrx')
call psb_error()
endif
return
end subroutine dmsrx