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! { dg-do run }
module e_53_4_mod
!$omp declare target (N, Q)
integer, parameter :: N = 10
real :: Q(N,N)
contains
real function Pfun (i, k)
!$omp declare target
integer, intent(in) :: i, k
Pfun = (Q(i,k) * Q(k,i))
end function
end module
real function accum (k) result (tmp)
use e_53_4_mod
integer :: i, k
tmp = 0.0e0
!$omp target
!$omp parallel do reduction(+:tmp)
do i = 1, N
tmp = tmp + Pfun (k, i)
end do
!$omp end target
end function
real function accum_ref (k) result (tmp)
use e_53_4_mod
integer :: i, k
tmp = 0.0e0
do i = 1, N
tmp = tmp + Pfun (k, i)
end do
end function
subroutine init ()
use e_53_4_mod
integer :: i, j
do i = 1, N
do j = 1, N
Q(i,j) = 0.001 * i * j
end do
end do
end subroutine
subroutine check (a, b)
real :: a, b, err
real, parameter :: EPS = 0.00001
if (b == 0.0) then
err = a
else if (a == 0.0) then
err = b
else
err = (a - b) / b
end if
if (err > EPS .or. err < -EPS) call abort
end subroutine
program e_53_4
use e_53_4_mod
integer :: i
real :: accum, accum_ref
call init ()
!$omp target update to(Q)
do i = 1, N
call check (accum (i), accum_ref (i))
end do
end program
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