| ! { dg-do run } |
| ! { dg-require-effective-target offload_device_nonshared_as } |
| |
| subroutine init (v1, v2, N) |
| !$omp declare target |
| integer :: i, N |
| real :: v1(N), v2(N) |
| do i = 1, N |
| v1(i) = i + 2.0 |
| v2(i) = i - 3.0 |
| end do |
| end subroutine |
| |
| subroutine check (p, N) |
| integer :: i, N |
| real, parameter :: EPS = 0.00001 |
| real :: diff, p(N) |
| do i = 1, N |
| diff = p(i) - (i + 2.0) * (i - 3.0) |
| if (diff > EPS .or. -diff > EPS) stop 1 |
| end do |
| end subroutine |
| |
| subroutine vec_mult (p, N) |
| use omp_lib, only: omp_is_initial_device |
| real :: p(N) |
| real, allocatable :: v1(:), v2(:) |
| integer :: i |
| !$omp declare target (init) |
| !$omp target data map(to: v1, v2, N) map(from: p) |
| !$omp task shared(v1, v2, p) depend(out: v1, v2) |
| !$omp target map(to: v1, v2, N) |
| if (omp_is_initial_device ()) stop 2 |
| allocate (v1(N), v2(N)) |
| call init (v1, v2, N) |
| !$omp end target |
| !$omp end task |
| !$omp task shared(v1, v2, p) depend(in: v1, v2) |
| !$omp target map(to: v1, v2, N) map(from: p) |
| if (omp_is_initial_device ()) stop 3 |
| !$omp parallel do |
| do i = 1, N |
| p(i) = v1(i) * v2(i) |
| end do |
| deallocate (v1, v2) |
| !$omp end target |
| !$omp end task |
| !$omp end target data |
| |
| !$omp taskwait |
| call check (p, N) |
| end subroutine |
| |
| program e_55_2 |
| integer, parameter :: N = 1000 |
| real :: p(N) |
| call vec_mult (p, N) |
| end program |