43 lines
615 B
C
43 lines
615 B
C
#include <assert.h>
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int
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main (int argc, char *argv[])
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{
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int res, res2 = 0;
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#if defined(ACC_DEVICE_TYPE_host)
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# define GANGS 1
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#else
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# define GANGS 256
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#endif
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#pragma acc parallel num_gangs(GANGS) copy(res2)
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{
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#pragma acc atomic
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res2 += 5;
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}
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res = GANGS * 5;
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assert (res == res2);
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#undef GANGS
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res = res2 = 1;
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#if defined(ACC_DEVICE_TYPE_host)
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# define GANGS 1
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#else
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# define GANGS 8
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#endif
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#pragma acc parallel num_gangs(GANGS) copy(res2)
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{
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#pragma acc atomic
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res2 *= 5;
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}
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for (int i = 0; i < GANGS; ++i)
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res *= 5;
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assert (res == res2);
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#undef GANGS
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return 0;
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}
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