Retro68/gcc/libgomp/testsuite/libgomp.fortran/examples-4/target_data-6.f90
2017-04-10 13:32:00 +02:00

67 lines
1.5 KiB
Fortran

! { dg-do run }
! { dg-require-effective-target offload_device_nonshared_as }
module e_51_6_mod
integer, parameter :: THRESHOLD = 500
contains
subroutine init (v1, v2, N)
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 init_again (v1, v2, N)
integer :: i, N
real :: v1(N), v2(N)
do i = 1, N
v1(i) = i - 3.0
v2(i) = i + 2.0
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) - 2 * (i + 2.0) * (i - 3.0)
if (diff > EPS .or. -diff > EPS) call abort
end do
end subroutine
subroutine vec_mult (N)
use omp_lib, only: omp_is_initial_device
real :: p(N), v1(N), v2(N)
integer :: i, N
call init (v1, v2, N)
!$omp target data if(N > THRESHOLD) map(from: p)
!$omp target if(N > THRESHOLD) map(to: v1, v2)
if (omp_is_initial_device ()) call abort
!$omp parallel do
do i = 1, N
p(i) = v1(i) * v2(i)
end do
!$omp end target
call init_again (v1, v2, N)
!$omp target if(N > THRESHOLD) map(to: v1, v2)
if (omp_is_initial_device ()) call abort
!$omp parallel do
do i = 1, N
p(i) = p(i) + v1(i) * v2(i)
end do
!$omp end target
!$omp end target data
call check (p, N)
end subroutine
end module
program e_51_6
use e_51_6_mod, only : vec_mult
integer :: n
n = 1000
call vec_mult (n)
end program