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- /* { dg-do run } */
- #include <stdlib.h>
- #define EPS 0.000001
- #define N 100000
- void init (double *a1, double *a2)
- {
- double s = -1;
- int i;
- for (i = 0; i < N; i++)
- {
- a1[i] = s;
- a2[i] = i;
- s = -s;
- }
- }
- void check (double *a, double *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 (double *p, double *v1, double *v2)
- {
- int i;
- for (i = 0; i < N; i++)
- p[i] = v1[i] * v2[i];
- }
- void vec_mult (double *p, double *v1, double *v2)
- {
- int i;
- #pragma omp target map(to: v1[0:N], v2[:N]) map(from: p[0:N])
- #pragma omp parallel for
- for (i = 0; i < N; i++)
- p[i] = v1[i] * v2[i];
- }
- int main ()
- {
- double p1[N], p2[N];
- double 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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