mirror of git://gcc.gnu.org/git/gcc.git
99 lines
1.6 KiB
C
99 lines
1.6 KiB
C
/* { dg-do run } */
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/* { dg-require-effective-target offload_device_nonshared_as } */
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#include <omp.h>
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#include <stdlib.h>
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#define EPS 0.00001
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#define N 10000
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#pragma omp declare target
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void init (float *a, float *b, int n)
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{
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int i;
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for (i = 0; i < n; i++)
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{
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a[i] = 0.1 * i;
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b[i] = 0.01 * i * i;
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}
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}
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#pragma omp end declare target
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void vec_mult_ref(float *p, int n)
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{
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float *v1, *v2;
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int i;
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v1 = (float *) malloc (n * sizeof (float));
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v2 = (float *) malloc (n * sizeof (float));
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init (v1, v2, n);
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for (i = 0; i < n; i++)
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p[i] = v1[i] * v2[i];
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free (v1);
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free (v2);
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}
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void vec_mult(float *p, int n)
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{
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float *v1, *v2;
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int i;
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#pragma omp task shared(v1, v2) depend(out: v1, v2)
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#pragma omp target map(v1, v2)
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{
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if (omp_is_initial_device ())
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abort ();
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v1 = (float *) malloc (n * sizeof (float));
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v2 = (float *) malloc (n * sizeof (float));
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init (v1, v2, n);
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}
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#pragma omp task shared(v1, v2) depend(in: v1, v2)
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#pragma omp target map(to: v1, v2) map(from: p[0:n])
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{
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if (omp_is_initial_device ())
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abort ();
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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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free (v1);
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free (v2);
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}
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#pragma omp taskwait
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}
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void check (float *a, float *b, int n)
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{
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int i;
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for (i = 0 ; i < n ; i++)
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{
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float err = (a[i] == 0.0) ? b[i] : (b[i] - a[i]) / a[i];
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if (((err > 0) ? err : -err) > EPS)
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abort ();
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}
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}
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int main ()
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{
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float *p1 = (float *) malloc (N * sizeof (float));
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float *p2 = (float *) malloc (N * sizeof (float));
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vec_mult_ref (p1, N);
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vec_mult (p2, N);
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check (p1, p2, N);
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free (p1);
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free (p2);
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return 0;
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}
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