OpenMP-Examples/sources/Example_target_task_reduction.2b.f90
2020-06-26 07:54:45 -07:00

39 lines
894 B
Fortran

! @@name: target_task_reduction.2b.f90
! @@type: F-free
! @@compilable: yes
! @@linkable: yes
! @@expect: success
! @@version: omp_5.0
program target_task_reduction_ex2b
interface
subroutine device_compute(res)
!$omp declare target to(device_compute)
integer :: res
end subroutine device_compute
subroutine host_compute(res)
integer :: res
end subroutine host_compute
end interface
integer :: sum
sum = 0
!$omp parallel master reduction(task,+:sum)
!$omp target in_reduction(+:sum) nowait
call device_compute(sum)
!$omp end target
call host_compute(sum)
!$omp end parallel sections
print *, "sum = ", sum
!!OUTPUT: sum = 2
end program
subroutine device_compute(sum)
integer :: sum
sum = 1
end subroutine
subroutine host_compute(sum)
integer :: sum
sum = 1
end subroutine