68 lines
1.1 KiB
C
68 lines
1.1 KiB
C
/* { dg-do run } */
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/* { dg-require-effective-target offload_device_nonshared_as } */
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#include <omp.h>
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#include <stdlib.h>
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#define EPS 0.000001
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#define N 100000
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#define THRESHOLD1 10000
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#define THRESHOLD2 1000
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void init (float *a1, float *a2)
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{
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float s = -1;
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int i;
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for (i = 0; i < N; i++)
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{
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a1[i] = s;
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a2[i] = i;
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s = -s;
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}
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}
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void check (float *a, float *b)
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{
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int i;
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for (i = 0; i < N; i++)
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if (a[i] - b[i] > EPS || b[i] - a[i] > EPS)
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abort ();
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}
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void vec_mult_ref (float *p, float *v1, float *v2)
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{
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int i;
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for (i = 0; i < N; i++)
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p[i] = v1[i] * v2[i];
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}
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void vec_mult (float *p, float *v1, float *v2)
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{
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int i;
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#pragma omp target if(N > THRESHOLD1) map(to: v1[0:N], v2[:N]) \
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map(from: p[0:N])
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{
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if (omp_is_initial_device ())
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abort ();
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#pragma omp parallel for if(N > THRESHOLD2)
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for (i = 0; i < N; i++)
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p[i] = v1[i] * v2[i];
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}
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}
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int main ()
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{
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float p1[N], p2[N];
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float v1[N], v2[N];
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init (v1, v2);
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vec_mult_ref (p1, v1, v2);
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vec_mult (p2, v1, v2);
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check (p1, p2);
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return 0;
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}
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