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psblas3/base/serial/psb_dspgtdiag.f90

123 lines
3.9 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_dspgtdiag.f90
! Subroutine:
! Arguments:
!*****************************************************************************
!* *
!* *
!*****************************************************************************
subroutine psb_dspgtdiag(a,d,info)
! Output is always in COO format into B, irrespective of
! the input format
use psb_spmat_type
use psb_error_mod
use psb_const_mod
use psb_serial_mod, psb_protect_name => psb_dspgtdiag
implicit none
type(psb_dspmat_type), intent(in) :: a
real(kind(1.d0)), intent(inout) :: d(:)
integer, intent(out) :: info
type(psb_dspmat_type) :: tmpa
integer :: i,j, err_act, ii, rng, irb, nrb
character(len=20) :: name, ch_err
name='psb_dspgtdiag'
info = 0
call psb_erractionsave(err_act)
if (size(d) < min(a%k,a%m)) then
info=35
call psb_errpush(info,name,i_err=(/2,size(d),0,0,0/))
goto 9999
end if
d(:) = 0.d0
if (a%fida == 'CSR') then
do i=1, min(a%m,a%k)
do j=a%ia2(i),a%ia2(i+1)-1
if (a%ia1(j) == i) then
d(i) = a%aspk(j)
end if
end do
end do
else if (a%fida == 'COO') then
do i=1,a%infoa(psb_nnz_)
j=a%ia1(i)
if ((j==a%ia2(i)).and.(j <= min(a%k,a%m)) .and.(j>0)) then
d(j) = a%aspk(i)
endif
enddo
else if (a%fida == 'JAD') then
rng=min(a%m,a%k)
nrb=16
do i=1, rng, nrb
irb=min(i+nrb-1,rng)
call psb_sp_getblk(i,a,tmpa,info,lrw=irb)
if(info /= 0) then
info=4010
ch_err='psb_sp_getblk'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
do ii=1,tmpa%infoa(psb_nnz_)
j=tmpa%ia1(ii)
if ((j==tmpa%ia2(ii)).and.(j <= rng) .and.(j>0)) then
d(j) = tmpa%aspk(ii)
endif
enddo
end do
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_dspgtdiag