You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
psblas3/ext/impl/psb_d_ell_csmv.f90

434 lines
11 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 psb_d_ell_csmv(alpha,a,x,beta,y,info,trans)
use psb_base_mod
use psb_d_ell_mat_mod, psb_protect_name => psb_d_ell_csmv
implicit none
class(psb_d_ell_sparse_mat), intent(in) :: a
real(psb_dpk_), intent(in) :: alpha, beta, x(:)
real(psb_dpk_), intent(inout) :: y(:)
integer(psb_ipk_), intent(out) :: info
character, optional, intent(in) :: trans
character :: trans_
integer(psb_ipk_) :: i,j,k,m,n, nnz, ir, jc
real(psb_dpk_) :: acc
logical :: tra, ctra
Integer(Psb_ipk_) :: err_act
character(len=20) :: name='d_ell_csmv'
logical, parameter :: debug=.false.
call psb_erractionsave(err_act)
info = psb_success_
if (present(trans)) then
trans_ = trans
else
trans_ = 'N'
end if
if (.not.a%is_asb()) then
info = psb_err_invalid_mat_state_
call psb_errpush(info,name)
goto 9999
endif
if (a%is_dev()) call a%sync()
tra = (psb_toupper(trans_) == 'T')
ctra = (psb_toupper(trans_) == 'C')
if (tra.or.ctra) then
m = a%get_ncols()
n = a%get_nrows()
else
n = a%get_ncols()
m = a%get_nrows()
end if
if (size(x,1)<n) then
info = 36
call psb_errpush(info,name,i_err=(/3*ione,n/))
goto 9999
end if
if (size(y,1)<m) then
info = 36
call psb_errpush(info,name,i_err=(/5*ione,m/))
goto 9999
end if
call psb_d_ell_csmv_inner(m,n,alpha,size(a%ja,2,kind=psb_ipk_),&
& a%ja,size(a%ja,1,kind=psb_ipk_),a%val,size(a%val,1,kind=psb_ipk_),&
& a%is_triangle(),a%is_unit(),&
& x,beta,y,tra,ctra)
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
contains
subroutine psb_d_ell_csmv_inner(m,n,alpha,nc,ja,ldj,val,ldv,&
& is_triangle,is_unit, x,beta,y,tra,ctra)
integer(psb_ipk_), intent(in) :: m,n,nc,ldj,ldv,ja(ldj,*)
real(psb_dpk_), intent(in) :: alpha, beta, x(*),val(ldv,*)
real(psb_dpk_), intent(inout) :: y(*)
logical, intent(in) :: is_triangle,is_unit,tra,ctra
integer(psb_ipk_) :: i,j,k, ir, jc, m4
real(psb_dpk_) :: acc(4)
if (alpha == dzero) then
if (beta == dzero) then
do i = 1, m
y(i) = dzero
enddo
else
do i = 1, m
y(i) = beta*y(i)
end do
endif
return
end if
if (.not.(tra.or.ctra)) then
if (beta == dzero) then
m4 = mod(m,4)
do i=1,m4
acc(1) = dzero
do j=1,nc
acc(1) = acc(1) + val(i,j) * x(ja(i,j))
enddo
y(i) = alpha*acc(1)
end do
if (alpha == done) then
!$omp parallel do private(i, j, acc)
do i=m4+1,m,4
acc = dzero
do j=1,nc
acc(1:4) = acc(1:4) + val(i:i+3,j) * x(ja(i:i+3,j))
enddo
y(i:i+3) = acc(1:4)
end do
else if (alpha == -done) then
!$omp parallel do private(i, j, acc)
do i=m4+1,m,4
acc = dzero
do j=1,nc
acc(1:4) = acc(1:4) - val(i:i+3,j) * x(ja(i:i+3,j))
enddo
y(i:i+3) = acc(1:4)
end do
else
!$omp parallel do private(i, j, acc)
do i=m4+1,m,4
acc = dzero
do j=1,nc
acc(1:4) = acc(1:4) + val(i:i+3,j) * x(ja(i:i+3,j))
enddo
y(i:i+3) = alpha * acc(1:4)
end do
end if
else if (beta == done) then
m4 = mod(m,4)
do i=1,m4
acc(1) = dzero
do j=1,nc
acc(1) = acc(1) + val(i,j) * x(ja(i,j))
enddo
y(i) = y(i) + alpha*acc(1)
end do
if (alpha == done) then
!$omp parallel do private(i, j, acc)
do i=m4+1,m,4
acc = dzero
do j=1,nc
acc(1:4) = acc(1:4) + val(i:i+3,j) * x(ja(i:i+3,j))
enddo
y(i:i+3) = y(i:i+3) + acc(1:4)
end do
else if (alpha == -done) then
!$omp parallel do private(i, j, acc)
do i=m4+1,m,4
acc = dzero
do j=1,nc
acc(1:4) = acc(1:4) - val(i:i+3,j) * x(ja(i:i+3,j))
enddo
y(i:i+3) = y(i:i+3) + acc(1:4)
end do
else
!$omp parallel do private(i, j, acc)
do i=m4+1,m,4
acc = dzero
do j=1,nc
acc(1:4) = acc(1:4) + val(i:i+3,j) * x(ja(i:i+3,j))
enddo
y(i:i+3) = y(i:i+3) + alpha*acc(1:4)
end do
end if
else if (beta == -done) then
m4 = mod(m,4)
do i=1,m4
acc(1) = dzero
do j=1,nc
acc(1) = acc(1) + val(i,j) * x(ja(i,j))
enddo
y(i) = - y(i) + alpha*acc(1)
end do
if (alpha == done) then
!$omp parallel do private(i, j, acc)
do i=m4+1,m,4
acc = dzero
do j=1,nc
acc(1:4) = acc(1:4) + val(i:i+3,j) * x(ja(i:i+3,j))
enddo
y(i:i+3) = -y(i:i+3) + acc(1:4)
end do
else if (alpha == -done) then
!$omp parallel do private(i, j, acc)
do i=m4+1,m,4
acc = dzero
do j=1,nc
acc(1:4) = acc(1:4) - val(i:i+3,j) * x(ja(i:i+3,j))
enddo
y(i:i+3) = -y(i:i+3) + acc(1:4)
end do
else
!$omp parallel do private(i, j, acc)
do i=m4+1,m,4
acc = dzero
do j=1,nc
acc(1:4) = acc(1:4) + val(i:i+3,j) * x(ja(i:i+3,j))
enddo
y(i:i+3) = -y(i:i+3) + alpha*acc(1:4)
end do
end if
else
m4 = mod(m,4)
do i=1,m4
acc(1) = dzero
do j=1,nc
acc(1) = acc(1) + val(i,j) * x(ja(i,j))
enddo
y(i) = beta*y(i) + alpha*acc(1)
end do
if (alpha == done) then
!$omp parallel do private(i, j, acc)
do i=m4+1,m,4
acc = dzero
do j=1,nc
acc(1:4) = acc(1:4) + val(i:i+3,j) * x(ja(i:i+3,j))
enddo
y(i:i+3) = beta*y(i:i+3) + acc(1:4)
end do
else if (alpha == -done) then
!$omp parallel do private(i, j, acc)
do i=m4+1,m,4
acc = dzero
do j=1,nc
acc(1:4) = acc(1:4) - val(i:i+3,j) * x(ja(i:i+3,j))
enddo
y(i:i+3) = beta*y(i:i+3) + acc(1:4)
end do
else
!$omp parallel do private(i, j, acc)
do i=m4+1,m,4
acc = dzero
do j=1,nc
acc(1:4) = acc(1:4) + val(i:i+3,j) * x(ja(i:i+3,j))
enddo
y(i:i+3) = beta*y(i:i+3) + alpha*acc(1:4)
end do
end if
end if
else if (tra) then
if (beta == dzero) then
do i=1, m
y(i) = dzero
end do
else if (beta == done) then
! Do nothing
else if (beta == -done) then
do i=1, m
y(i) = -y(i)
end do
else
do i=1, m
y(i) = beta*y(i)
end do
end if
!
! Need to think about this.
! Transpose does not mix well with ELLPACK.
!
if (alpha == done) then
do i=1,n
do j=1,nc
ir = ja(i,j)
y(ir) = y(ir) + val(i,j)*x(i)
end do
enddo
else if (alpha == -done) then
do i=1,n
do j=1,nc
ir = ja(i,j)
y(ir) = y(ir) - val(i,j)*x(i)
end do
enddo
else
do i=1,n
do j=1,nc
ir = ja(i,j)
y(ir) = y(ir) + alpha*val(i,j)*x(i)
end do
enddo
end if
else if (ctra) then
if (beta == dzero) then
do i=1, m
y(i) = dzero
end do
else if (beta == done) then
! Do nothing
else if (beta == -done) then
do i=1, m
y(i) = -y(i)
end do
else
do i=1, m
y(i) = beta*y(i)
end do
end if
!
! Need to think about this.
! Transpose does not mix well with ELLPACK.
!
if (alpha == done) then
do i=1,n
do j=1,nc
ir = ja(i,j)
y(ir) = y(ir) + (val(i,j))*x(i)
end do
enddo
else if (alpha == -done) then
do i=1,n
do j=1,nc
ir = ja(i,j)
y(ir) = y(ir) - (val(i,j))*x(i)
end do
enddo
else
do i=1,n
do j=1,nc
ir = ja(i,j)
y(ir) = y(ir) + alpha*(val(i,j))*x(i)
end do
enddo
end if
endif
if (is_unit) then
do i=1, min(m,n)
y(i) = y(i) + alpha*x(i)
end do
end if
end subroutine psb_d_ell_csmv_inner
end subroutine psb_d_ell_csmv