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https://github.com/autc04/Retro68.git
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95 lines
1.8 KiB
Fortran
95 lines
1.8 KiB
Fortran
! { dg-do run }
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! { dg-additional-options "-cpp -w" }
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program reduction
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implicit none
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integer, parameter :: n = 100, n2 = 1000, chunksize = 10
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integer :: i, gs1, gs2, ws1, ws2, vs1, vs2, cs1, cs2, hs1, hs2
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integer :: j, red, vred
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gs1 = 0
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gs2 = 0
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ws1 = 0
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ws2 = 0
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vs1 = 0
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vs2 = 0
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cs1 = 0
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cs2 = 0
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hs1 = 0
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hs2 = 0
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!$acc parallel num_gangs (1000)
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!$acc loop reduction(+:gs1, gs2) gang
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do i = 1, n
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gs1 = gs1 + 1
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gs2 = gs2 + 2
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end do
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!$acc end parallel
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!$acc parallel num_workers (4) vector_length (32)
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!$acc loop reduction(+:ws1, ws2) worker
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do i = 1, n
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ws1 = ws1 + 1
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ws2 = ws2 + 2
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end do
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!$acc end parallel
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!$acc parallel vector_length (32)
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!$acc loop reduction(+:vs1, vs2) vector
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do i = 1, n
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vs1 = vs1 + 1
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vs2 = vs2 + 2
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end do
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!$acc end parallel
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!$acc parallel num_gangs(8) num_workers(4) vector_length(32)
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!$acc loop reduction(+:cs1, cs2) gang worker vector
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do i = 1, n
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cs1 = cs1 + 1
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cs2 = cs2 + 2
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end do
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!$acc end parallel
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! Verify the results on the host
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do i = 1, n
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hs1 = hs1 + 1
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hs2 = hs2 + 2
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end do
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if (gs1 .ne. hs1) call abort ()
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if (gs2 .ne. hs2) call abort ()
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if (ws1 .ne. hs1) call abort ()
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if (ws2 .ne. hs2) call abort ()
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if (vs1 .ne. hs1) call abort ()
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if (vs2 .ne. hs2) call abort ()
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if (cs1 .ne. hs1) call abort ()
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if (cs2 .ne. hs2) call abort ()
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! Nested reductions.
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red = 0
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vred = 0
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!$acc parallel num_gangs(10) vector_length(32)
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!$acc loop reduction(+:red) gang
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do i = 1, n/chunksize
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!$acc loop reduction(+:red) vector
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do j = 1, chunksize
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red = red + chunksize
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end do
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end do
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!$acc end parallel
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do i = 1, n/chunksize
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do j = 1, chunksize
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vred = vred + chunksize
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end do
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end do
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if (red .ne. vred) call abort ()
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end program reduction
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