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82 lines
2.0 KiB
Fortran
82 lines
2.0 KiB
Fortran
submodule (psb_d_oacc_csr_mat_mod) psb_d_oacc_csr_csmv_impl
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use psb_base_mod
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contains
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module subroutine psb_d_oacc_csr_csmv(alpha, a, x, beta, y, info, trans)
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implicit none
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class(psb_d_oacc_csr_sparse_mat), intent(in) :: a
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real(psb_dpk_), intent(in) :: alpha, beta
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real(psb_dpk_), intent(in) :: x(:)
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real(psb_dpk_), intent(inout) :: y(:)
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integer(psb_ipk_), intent(out) :: info
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character, optional, intent(in) :: trans
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character :: trans_
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integer(psb_ipk_) :: i, j, m, n
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logical :: tra
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integer(psb_ipk_) :: err_act
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character(len=20) :: name = 'd_oacc_csmv'
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logical, parameter :: debug = .false.
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call psb_erractionsave(err_act)
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info = psb_success_
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if (present(trans)) then
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trans_ = trans
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else
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trans_ = 'N'
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end if
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if (.not.a%is_asb()) then
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info = psb_err_invalid_mat_state_
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call psb_errpush(info, name)
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goto 9999
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endif
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tra = (psb_toupper(trans_) == 'T') .or. (psb_toupper(trans_) == 'C')
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if (tra) then
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m = a%get_ncols()
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n = a%get_nrows()
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else
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n = a%get_ncols()
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m = a%get_nrows()
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end if
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if (size(x,1) < n) then
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info = 36
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call psb_errpush(info, name, i_err = (/3 * ione, n, izero, izero, izero/))
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goto 9999
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end if
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if (size(y,1) < m) then
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info = 36
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call psb_errpush(info, name, i_err = (/5 * ione, m, izero, izero, izero/))
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goto 9999
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end if
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if (tra) then
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call a%psb_d_csr_sparse_mat%spmm(alpha, x, beta, y, info, trans)
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else
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!$acc parallel loop present(a, x, y)
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do i = 1, m
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y(i) = beta * y(i)
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end do
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!$acc parallel loop present(a, x, y)
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do i = 1, n
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do j = a%irp(i), a%irp(i+1) - 1
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y(a%ja(j)) = y(a%ja(j)) + alpha * a%val(j) * x(i)
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end do
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end do
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endif
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(err_act)
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return
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end subroutine psb_d_oacc_csr_csmv
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end submodule psb_d_oacc_csr_csmv_impl
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