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https://github.com/OpenMP/Examples.git
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34 lines
759 B
Fortran
34 lines
759 B
Fortran
! @@name: declare_target.4
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! @@type: F-free
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! @@operation: compile
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! @@expect: success
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! @@version: omp_4.0
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module my_global_array
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!$omp declare target (N,Q)
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integer, parameter :: N=10
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real :: Q(N,N)
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contains
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function Pfun(i,k)
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!$omp declare target
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real :: Pfun
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integer,intent(in) :: i,k
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Pfun=(Q(i,k) * Q(k,i))
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end function
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end module
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function accum(k) result(tmp)
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use my_global_array
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real :: tmp
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integer :: i, k
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tmp = 0.0e0
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!$omp target map(tofrom: tmp)
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!$omp parallel do reduction(+:tmp)
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do i=1,N
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tmp = tmp + Pfun(k,i)
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end do
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!$omp end target
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end function
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! Note: The variable tmp is now mapped with tofrom, for correct
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! execution with 4.5 (and pre-4.5) compliant compilers. See Devices Intro.
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