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64 lines
1.9 KiB
Fortran
64 lines
1.9 KiB
Fortran
submodule (psb_d_oacc_csr_mat_mod) psb_d_oacc_csr_vect_mv_impl
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use psb_base_mod
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contains
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module subroutine psb_d_oacc_csr_vect_mv(alpha, a, x, beta, y, info, trans)
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implicit none
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real(psb_dpk_), intent(in) :: alpha, beta
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class(psb_d_oacc_csr_sparse_mat), intent(in) :: a
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class(psb_d_base_vect_type), intent(inout) :: x, y
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integer(psb_ipk_), intent(out) :: info
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character, optional, intent(in) :: trans
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integer(psb_ipk_) :: m, n
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info = psb_success_
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m = a%get_nrows()
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n = a%get_ncols()
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if ((n /= size(x%v)) .or. (n /= size(y%v))) then
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write(0,*) 'Size error ', m, n, size(x%v), size(y%v)
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info = psb_err_invalid_mat_state_
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return
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end if
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if (a%is_host()) call a%sync()
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if (x%is_host()) call x%sync()
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if (y%is_host()) call y%sync()
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call inner_spmv(m, n, alpha, a%val, a%ja, a%irp, x%v, beta, y%v, info)
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call y%set_dev()
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contains
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subroutine inner_spmv(m, n, alpha, val, ja, irp, x, beta, y, info)
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implicit none
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integer(psb_ipk_) :: m, n
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real(psb_dpk_), intent(in) :: alpha, beta
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real(psb_dpk_) :: val(:), x(:), y(:)
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integer(psb_ipk_) :: ja(:), irp(:)
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_) :: i, j, ii, isz
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real(psb_dpk_) :: tmp
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integer(psb_ipk_), parameter :: vsz = 256
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info = 0
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!$acc parallel loop vector_length(vsz) private(isz)
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do ii = 1, m, vsz
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isz = min(vsz, m - ii + 1)
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!$acc loop independent private(tmp)
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do i = ii, ii + isz - 1
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tmp = 0.0_psb_dpk_
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!$acc loop seq
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do j = irp(i), irp(i + 1) - 1
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tmp = tmp + val(j) * x(ja(j))
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end do
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y(i) = alpha * tmp + beta * y(i)
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end do
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end do
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end subroutine inner_spmv
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end subroutine psb_d_oacc_csr_vect_mv
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end submodule psb_d_oacc_csr_vect_mv_impl
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