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psblas3/ext/impl/psi_d_xtr_coo_from_dia.f90

81 lines
3.1 KiB
Fortran

! Parallel Sparse BLAS GPU plugin
! (C) Copyright 2013
!
! Salvatore Filippone
! Alessandro Fanfarillo
!
! 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.
!
subroutine psi_d_xtr_coo_from_dia(nr,nc,ia,ja,val,nz,nrd,ncd,data,offsets,info,rdisp)
use psb_base_mod, only : psb_ipk_, psb_success_, psb_dpk_, dzero
implicit none
integer(psb_ipk_), intent(in) :: nr,nc, nrd,ncd, offsets(:)
integer(psb_ipk_), intent(inout) :: ia(:), ja(:),nz
real(psb_dpk_), intent(inout) :: val(:)
real(psb_dpk_), intent(in) :: data(nrd,ncd)
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_), intent(in), optional :: rdisp
!locals
integer(psb_ipk_) :: rdisp_, nrcmdisp, rdisp1
integer(psb_ipk_) :: i,j,ir1, ir2, ir, ic,k
logical, parameter :: debug=.false.
info = psb_success_
rdisp_ = 0
if (present(rdisp)) rdisp_ = rdisp
if (debug) write(0,*) 'Start xtr_coo_from_dia',nr,nc,nrd,ncd, rdisp_
nrcmdisp = min(nr-rdisp_,nc-rdisp_)
rdisp1 = 1-rdisp_
nz = 0
do j=1, ncd
if (offsets(j)>=0) then
ir1 = 1
! ir2 = min(nrd,nr - offsets(j) - rdisp_,nc-offsets(j)-rdisp_)
ir2 = min(nrd, nrcmdisp - offsets(j))
else
! ir1 = max(1,1-offsets(j)-rdisp_)
ir1 = max(1, rdisp1 - offsets(j))
ir2 = min(nrd, nrcmdisp)
end if
if (debug) write(0,*) ' Loop J',j,ir1,ir2, offsets(j)
do i=ir1,ir2
ir = i + rdisp_
ic = i + rdisp_ + offsets(j)
if (debug) write(0,*) ' Loop I',i,ir,ic
nz = nz + 1
ia(nz) = ir
ja(nz) = ic
val(nz) = data(i,j)
enddo
end do
end subroutine psi_d_xtr_coo_from_dia