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psblas3/base/serial/psb_dspshift.f90

92 lines
3.5 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_dspgtblk.f90
! Subroutine: psb_dspgtblk
! Gets one or more rows from a sparse matrix.
! Arguments:
!*****************************************************************************
!* *
!* Takes a specified row from matrix A and copies into matrix B (possibly *
!* appending to B). Output is always COO. Input might be anything, *
!* *
!*****************************************************************************
subroutine psb_dspshift(alpha,a,beta,b,info)
! Output is always in COO format into B, irrespective of
! the input format
use psb_spmat_type
use psb_const_mod
use psb_string_mod
use psb_serial_mod, psb_protect_name => psb_dspshift
implicit none
type(psb_dspmat_type), intent(in) :: a
type(psb_dspmat_type), intent(out) :: b
real(psb_dpk_), intent(in) :: alpha, beta
integer, intent(out) :: info
logical :: append_,srt_
integer :: i,j, err_act
character(len=20) :: name
name='psb_sp_shift'
info = 0
call psb_erractionsave(err_act)
call psb_sp_setbld(a,b,info)
if (info == 0) call psb_sp_scal(b,alpha,info)
do i=1,min(b%m,b%k)
if (info == 0) call psb_coins(1,(/i/),(/i/),(/beta/),b,1,1,b%m,b%k,info)
end do
if (info == 0) call psb_spcnv(b,info,afmt=a%fida,dupl=psb_dupl_add_)
if (info /= 0) then
call psb_errpush(4010,name,a_err='Internal call')
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_dspshift