blob: 93ab78f106a56250562251e5201d1dd6fcb7f63b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
#include <assert.h>
/* Test of reduction on loop directive (workers and vectors, private reduction
variable). */
int
main (int argc, char *argv[])
{
int i, j, arr[32768], out[32], res = 0, hres = 0;
for (i = 0; i < 32768; i++)
arr[i] = i;
#pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
private(res) copyout(out)
{
#pragma acc loop gang
for (j = 0; j < 32; j++)
{
res = j;
#pragma acc loop worker reduction(+:res)
for (i = 0; i < 1024; i++)
res += arr[j * 1024 + i];
#pragma acc loop vector reduction(+:res)
for (i = 1023; i >= 0; i--)
res += arr[j * 1024 + i];
out[j] = res;
}
}
for (j = 0; j < 32; j++)
{
hres = j;
for (i = 0; i < 1024; i++)
hres += arr[j * 1024 + i] * 2;
assert (out[j] == hres);
}
return 0;
}
|
