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psblas3/ext/impl/psb_d_hll_csnm1.f90

112 lines
3.5 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.
!
function psb_d_hll_csnm1(a) result(res)
use psb_base_mod
use psb_d_hll_mat_mod, psb_protect_name => psb_d_hll_csnm1
implicit none
class(psb_d_hll_sparse_mat), intent(in) :: a
real(psb_dpk_) :: res
integer(psb_ipk_) :: i,j,k,m,n, nnz, ir, jc, nc, info, hksz, mxrwl
real(psb_dpk_), allocatable :: vt(:)
logical :: is_unit
Integer(Psb_ipk_) :: err_act
character(len=20) :: name='d_hll_csnm1'
logical, parameter :: debug=.false.
call psb_erractionsave(err_act)
info = psb_success_
res = dzero
if (a%is_dev()) call a%sync()
n = a%get_ncols()
m = a%get_nrows()
allocate(vt(n),stat=info)
if (Info /= 0) then
info = psb_err_alloc_dealloc_
call psb_errpush(info,name)
goto 9999
end if
if (a%is_unit()) then
vt = done
else
vt = dzero
end if
hksz = a%get_hksz()
j=1
do i=1,m,hksz
ir = min(hksz,m-i+1)
mxrwl = (a%hkoffs(j+1) - a%hkoffs(j))/hksz
k = a%hkoffs(j) + 1
call psb_d_hll_csnm1_inner(i,ir,mxrwl,a%irn(i),&
& a%ja(k),hksz,a%val(k),hksz,&
& vt,info)
if (info /= psb_success_) goto 9999
j = j + 1
end do
res = maxval(vt)
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
contains
subroutine psb_d_hll_csnm1_inner(ir,m,n,irn,ja,ldj,val,ldv,&
& vt,info)
integer(psb_ipk_), intent(in) :: ir,m,n,ldj,ldv,ja(ldj,*),irn(*)
real(psb_dpk_), intent(in) :: val(ldv,*)
real(psb_dpk_), intent(inout) :: vt(*)
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_) :: i,j,k, m4, jc
real(psb_dpk_) :: acc(4), tmp
info = psb_success_
do i=1,m
do j=1, irn(i)
jc = ja(i,j)
vt(jc) = vt(jc) + abs(val(i,j))
end do
end do
end subroutine psb_d_hll_csnm1_inner
end function psb_d_hll_csnm1