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