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- /* { dg-do run } */
- /* { dg-require-effective-target offload_device_nonshared_as } */
- #include <stdlib.h>
- #include <omp.h>
- #define EPS 0.000001
- #define THRESHOLD 1000
- const int MAX = 1800;
- void check (float *a, float *b, int N)
- {
- int i;
- for (i = 0; i < N; i++)
- if (a[i] - b[i] > EPS || b[i] - a[i] > EPS)
- abort ();
- }
- void init (float *a1, float *a2, int N)
- {
- float s = -1;
- int i;
- for (i = 0; i < N; i++)
- {
- a1[i] = s;
- a2[i] = i;
- s = -s;
- }
- }
- void init_again (float *a1, float *a2, int N)
- {
- float s = -1;
- int i;
- for (i = 0; i < N; i++)
- {
- a1[i] = s * 10;
- a2[i] = i;
- s = -s;
- }
- }
- void vec_mult_ref (float *p, float *v1, float *v2, int N)
- {
- int i;
- init (v1, v2, N);
- for (i = 0; i < N; i++)
- p[i] = v1[i] * v2[i];
- init_again (v1, v2, N);
- for (i = 0; i < N; i++)
- p[i] = p[i] + (v1[i] * v2[i]);
- }
- void vec_mult (float *p, float *v1, float *v2, int N)
- {
- int i;
- init (v1, v2, N);
- #pragma omp target data if(N > THRESHOLD) map(from: p[0:N])
- {
- #pragma omp target if (N > THRESHOLD) map(to: v1[:N], v2[:N])
- {
- if (omp_is_initial_device ())
- abort;
- #pragma omp parallel for
- for (i = 0; i < N; i++)
- p[i] = v1[i] * v2[i];
- }
- init_again (v1, v2, N);
- #pragma omp target if (N > THRESHOLD) map(to: v1[:N], v2[:N])
- {
- if (omp_is_initial_device ())
- abort ();
- #pragma omp parallel for
- for (i = 0; i < N; i++)
- p[i] = p[i] + (v1[i] * v2[i]);
- }
- }
- }
- int main ()
- {
- float *p1 = (float *) malloc (MAX * sizeof (float));
- float *p2 = (float *) malloc (MAX * sizeof (float));
- float *v1 = (float *) malloc (MAX * sizeof (float));
- float *v2 = (float *) malloc (MAX * sizeof (float));
- vec_mult_ref (p1, v1, v2, MAX);
- vec_mult (p2, v1, v2, MAX);
- check (p1, p2, MAX);
- free (p1);
- free (p2);
- free (v1);
- free (v2);
- return 0;
- }
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