Retro68/gcc/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c
2017-04-10 13:32:00 +02:00

57 lines
953 B
C

/* { dg-additional-options "-w" } */
#include <assert.h>
/* Test of reduction on parallel directive. */
#define ACTUAL_GANGS 256
int
main (int argc, char *argv[])
{
int res, res1 = 0, res2 = 0;
#if defined(ACC_DEVICE_TYPE_host)
# define GANGS 1
#else
# define GANGS 256
#endif
#pragma acc parallel num_gangs(GANGS) num_workers(32) vector_length(32) \
reduction(+:res1) copy(res2, res1)
{
res1 += 5;
#pragma acc atomic
res2 += 5;
}
res = GANGS * 5;
assert (res == res1);
assert (res == res2);
#undef GANGS
res = res1 = res2 = 1;
#if defined(ACC_DEVICE_TYPE_host)
# define GANGS 1
#else
# define GANGS 8
#endif
#pragma acc parallel num_gangs(GANGS) num_workers(32) vector_length(32) \
reduction(*:res1) copy(res1, res2)
{
res1 *= 5;
#pragma acc atomic
res2 *= 5;
}
for (int i = 0; i < GANGS; ++i)
res *= 5;
assert (res == res1);
assert (res == res2);
#undef GANGS
return 0;
}