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https://github.com/autc04/Retro68.git
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63 lines
814 B
C
63 lines
814 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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#pragma omp declare target
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float p1[N], p2[N], v1[N], v2[N];
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#pragma omp end declare target
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void init ()
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{
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int i, s = -1;
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for (i = 0; i < N; i++)
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{
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v1[i] = s * 0.01;
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v2[i] = i;
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s = -s;
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}
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}
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void check ()
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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 (p1[i] - p2[i] > EPS || p2[i] - p1[i] > EPS)
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abort ();
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}
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void vec_mult_ref ()
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{
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int i;
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for (i = 0; i < N; i++)
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p1[i] = v1[i] * v2[i];
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}
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void vec_mult ()
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{
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int i;
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#pragma omp target update to(v1, v2)
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#pragma omp target
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#pragma omp parallel for
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for (i = 0; i < N; i++)
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p2[i] = v1[i] * v2[i];
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#pragma omp target update from(p2)
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}
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int main ()
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{
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init ();
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vec_mult_ref ();
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vec_mult ();
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check ();
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return 0;
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}
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