libgomp/testsuite/libgomp.fortran/examples-4/async_target-2.f90

   1 ! { dg-do run }
   2 ! { dg-require-effective-target offload_device_nonshared_as }
   3
   4 subroutine init (v1, v2, N)
   5   !$omp declare target
   6   integer :: i, N
   7   real :: v1(N), v2(N)
   8   do i = 1, N
   9     v1(i) = i + 2.0
  10     v2(i) = i - 3.0
  11   end do
  12 end subroutine
  13
  14 subroutine check (p, N)
  15   integer :: i, N
  16   real, parameter :: EPS = 0.00001
  17   real :: diff, p(N)
  18   do i = 1, N
  19     diff = p(i) - (i + 2.0) * (i - 3.0)
  20     if (diff > EPS .or. -diff > EPS) call abort
  21   end do
  22 end subroutine
  23
  24 subroutine vec_mult (p, N)
  25   use omp_lib, only: omp_is_initial_device
  26   real :: p(N)
  27   real, allocatable :: v1(:), v2(:)
  28   integer :: i
  29   !$omp declare target (init)
  30   !$omp target data map(to: v1, v2, N) map(from: p)
  31     !$omp task shared(v1, v2, p) depend(out: v1, v2)
  32       !$omp target map(to: v1, v2, N)
  33         if (omp_is_initial_device ()) call abort
  34         allocate (v1(N), v2(N))
  35         call init (v1, v2, N)
  36       !$omp end target
  37     !$omp end task
  38     !$omp task shared(v1, v2, p) depend(in: v1, v2)
  39       !$omp target map(to: v1, v2, N) map(from: p)
  40         if (omp_is_initial_device ()) call abort
  41         !$omp parallel do
  42         do i = 1, N
  43           p(i) = v1(i) * v2(i)
  44         end do
  45         deallocate (v1, v2)
  46       !$omp end target
  47     !$omp end task
  48   !$omp end target data
  49
  50   !$omp taskwait
  51   call check (p, N)
  52 end subroutine
  53
  54 program e_55_2
  55   integer, parameter :: N = 1000
  56   real :: p(N)
  57   call vec_mult (p, N)
  58 end program