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59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
#include <assert.h>
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/* Test of reduction on both parallel and loop directives (workers and vectors
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together in gang-partitioned mode, float type, multiple reductions). */
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int
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main (int argc, char *argv[])
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{
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int i, j;
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float arr[32768];
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float res = 0, mres = 0, hres = 0, hmres = 0;
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for (i = 0; i < 32768; i++)
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arr[i] = i % (32768 / 64);
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#pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
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reduction(+:res) reduction(max:mres) copy(res, mres)
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{
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#pragma acc loop gang
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for (j = 0; j < 32; j++)
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{
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#pragma acc loop worker vector reduction(+:res) reduction(max:mres)
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for (i = 0; i < 1024; i++)
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{
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res += arr[j * 1024 + i];
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if (arr[j * 1024 + i] > mres)
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mres = arr[j * 1024 + i];
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}
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#pragma acc loop worker vector reduction(+:res) reduction(max:mres)
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for (i = 0; i < 1024; i++)
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{
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res += arr[j * 1024 + (1023 - i)];
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if (arr[j * 1024 + (1023 - i)] > mres)
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mres = arr[j * 1024 + (1023 - i)];
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}
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}
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}
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for (j = 0; j < 32; j++)
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for (i = 0; i < 1024; i++)
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{
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hres += arr[j * 1024 + i];
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hres += arr[j * 1024 + (1023 - i)];
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if (arr[j * 1024 + i] > hmres)
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hmres = arr[j * 1024 + i];
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if (arr[j * 1024 + (1023 - i)] > hmres)
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hmres = arr[j * 1024 + (1023 - i)];
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}
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assert (hres <= 16777216);
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assert (res == hres);
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assert (hmres <= 16777216);
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assert (mres == hmres);
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return 0;
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}
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