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! { dg-do run }
! { dg-options "-O2" }
! { dg-additional-options "-msse2" { target sse2_runtime } }
! { dg-additional-options "-mavx" { target avx_runtime } }
module e_53_5_mod
!$omp declare target (N, Q)
integer, parameter :: N = 10000, M = 1024
real :: Q(N,N)
contains
real function Pfun (k, i)
!$omp declare simd(Pfun) uniform(i) linear(k) notinbranch
!$omp declare target
integer, value, intent(in) :: i, k
Pfun = (Q(k,i) * Q(i,k))
end function
end module
real function accum () result (tmp)
use e_53_5_mod
real :: tmp1
integer :: i
tmp = 0.0e0
!$omp target
!$omp parallel do private(tmp1) reduction(+:tmp)
do i = 1, N
tmp1 = 0.0e0
!$omp simd reduction(+:tmp1)
do k = 1, M
tmp1 = tmp1 + Pfun (k, i)
end do
tmp = tmp + tmp1
end do
!$omp end target
end function
real function accum_ref () result (tmp)
use e_53_5_mod
real :: tmp1
integer :: i
tmp = 0.0e0
do i = 1, N
tmp1 = 0.0e0
do k = 1, M
tmp1 = tmp1 + Pfun (k, i)
end do
tmp = tmp + tmp1
end do
end function
subroutine init ()
use e_53_5_mod
integer :: i, j
do i = 1, N
do j = 1, N
Q(i,j) = 0.001 * i * j
end do
end do
end subroutine
subroutine check (a, b)
real :: a, b, err
real, parameter :: EPS = 0.00001
if (b == 0.0) then
err = a
else if (a == 0.0) then
err = b
else
err = (a - b) / b
end if
if (err > EPS .or. err < -EPS) call abort
end subroutine
program e_53_5
use e_53_5_mod
real :: accum, accum_ref, d
call init ()
!$omp target update to(Q)
call check (accum (), accum_ref ())
end program
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