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58 lines
868 B
C
58 lines
868 B
C
/* { dg-do run } */
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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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void init (double *a1, double *a2)
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{
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double 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 (double *a, double *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 (double *p, double *v1, double *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 (double *p, double *v1, double *v2)
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{
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int i;
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#pragma omp target map(to: v1[0:N], v2[:N]) map(from: p[0:N])
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#pragma omp parallel for
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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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int main ()
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{
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double p1[N], p2[N];
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double 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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