mirror of git://gcc.gnu.org/git/gcc.git
60 lines
1.2 KiB
Fortran
60 lines
1.2 KiB
Fortran
! { dg-do run }
|
|
|
|
function dotprod_ref (B, C, N) result (sum)
|
|
implicit none
|
|
real :: B(N), C(N), sum
|
|
integer :: N, i
|
|
sum = 0.0e0
|
|
do i = 1, N
|
|
sum = sum + B(i) * C(i)
|
|
end do
|
|
end function
|
|
|
|
function dotprod (B, C, N) result(sum)
|
|
real :: B(N), C(N), sum
|
|
integer :: N, i
|
|
sum = 0.0e0
|
|
!$omp target teams map(to: B, C) map(tofrom: sum) &
|
|
!$omp& reduction(+:sum)
|
|
!$omp distribute parallel do reduction(+:sum)
|
|
do i = 1, N
|
|
sum = sum + B(i) * C(i)
|
|
end do
|
|
!$omp end target teams
|
|
end function
|
|
|
|
subroutine init (B, C, N)
|
|
real :: B(N), C(N)
|
|
integer :: N, i
|
|
do i = 1, N
|
|
B(i) = 0.0001 * i
|
|
C(i) = 0.000001 * i * i
|
|
end do
|
|
end subroutine
|
|
|
|
subroutine check (a, b)
|
|
real :: a, b, err
|
|
real, parameter :: EPS = 0.0001
|
|
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_54_3
|
|
integer :: n
|
|
real :: ref, d
|
|
real, pointer, dimension(:) :: B, C
|
|
n = 1024 * 1024
|
|
allocate (B(n), C(n))
|
|
call init (B, C, n)
|
|
ref = dotprod_ref (B, C, n)
|
|
d = dotprod (B, C, n)
|
|
call check (ref, d)
|
|
deallocate (B, C)
|
|
end program
|