mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-03 10:49:58 +00:00
100 lines
2.0 KiB
Fortran
100 lines
2.0 KiB
Fortran
! { dg-do run }
|
|
! { dg-additional-options "-w" }
|
|
|
|
! subroutine reduction
|
|
|
|
program reduction
|
|
integer, parameter :: n = 40, c = 10
|
|
integer :: i, vsum, gs, ws, vs, cs, ns
|
|
|
|
call redsub_gang (gs, n, c)
|
|
call redsub_worker (ws, n, c)
|
|
call redsub_vector (vs, n, c)
|
|
call redsub_combined (cs, n, c)
|
|
call redsub_nested (ns, n, c)
|
|
|
|
vsum = 0
|
|
|
|
! Verify the results
|
|
do i = 1, n
|
|
vsum = vsum + c
|
|
end do
|
|
|
|
if (gs .ne. vsum) call abort ()
|
|
if (ws .ne. vsum) call abort ()
|
|
if (vs .ne. vsum) call abort ()
|
|
if (cs .ne. vsum) call abort ()
|
|
if (ns .ne. vsum) call abort ()
|
|
end program reduction
|
|
|
|
subroutine redsub_gang(sum, n, c)
|
|
integer :: sum, n, c
|
|
|
|
sum = 0
|
|
|
|
!$acc parallel copyin (n, c) num_gangs(n) copy(sum)
|
|
!$acc loop reduction(+:sum) gang
|
|
do i = 1, n
|
|
sum = sum + c
|
|
end do
|
|
!$acc end parallel
|
|
end subroutine redsub_gang
|
|
|
|
subroutine redsub_worker(sum, n, c)
|
|
integer :: sum, n, c
|
|
|
|
sum = 0
|
|
|
|
!$acc parallel copyin (n, c) num_workers(4) vector_length (32) copy(sum)
|
|
!$acc loop reduction(+:sum) worker
|
|
do i = 1, n
|
|
sum = sum + c
|
|
end do
|
|
!$acc end parallel
|
|
end subroutine redsub_worker
|
|
|
|
subroutine redsub_vector(sum, n, c)
|
|
integer :: sum, n, c
|
|
|
|
sum = 0
|
|
|
|
!$acc parallel copyin (n, c) vector_length(32) copy(sum)
|
|
!$acc loop reduction(+:sum) vector
|
|
do i = 1, n
|
|
sum = sum + c
|
|
end do
|
|
!$acc end parallel
|
|
end subroutine redsub_vector
|
|
|
|
subroutine redsub_combined(sum, n, c)
|
|
integer :: sum, n, c
|
|
|
|
sum = 0
|
|
|
|
!$acc parallel num_gangs (8) num_workers (4) vector_length(32) copy(sum)
|
|
!$acc loop reduction(+:sum) gang worker vector
|
|
do i = 1, n
|
|
sum = sum + c
|
|
end do
|
|
!$acc end parallel
|
|
end subroutine redsub_combined
|
|
|
|
subroutine redsub_nested(sum, n, c)
|
|
integer :: sum, n, c
|
|
integer :: ii, jj
|
|
|
|
ii = n / 10;
|
|
jj = 10;
|
|
sum = 0
|
|
|
|
!$acc parallel num_gangs (8) copy(sum)
|
|
!$acc loop reduction(+:sum) gang
|
|
do i = 1, ii
|
|
!$acc loop reduction(+:sum) vector
|
|
do j = 1, jj
|
|
sum = sum + c
|
|
end do
|
|
end do
|
|
!$acc end parallel
|
|
end subroutine redsub_nested
|