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/* { dg-do run } */
#include <stdlib.h>
#define EPS 0.000001
const int MAX = 1800;
void check (double *a, double *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 (double *a1, double *a2, int N)
{
double s = -1;
int i;
for (i = 0; i < N; i++)
{
a1[i] = s;
a2[i] = i;
s = -s;
}
}
void vec_mult_ref (double *p1, double *v3, double *v4, int N)
{
int i;
for (i = 0; i < N; i++)
p1[i] = v3[i] * v4[i];
}
void foo_ref (double *p0, double *v1, double *v2, int N)
{
init (v1, v2, N);
vec_mult_ref (p0, v1, v2, N);
}
void vec_mult (double *p1, double *v3, double *v4, int N)
{
int i;
#pragma omp target map(to: v3[0:N], v4[:N]) map(from: p1[0:N])
#pragma omp parallel for
for (i = 0; i < N; i++)
p1[i] = v3[i] * v4[i];
}
void foo (double *p0, double *v1, double *v2, int N)
{
init (v1, v2, N);
#pragma omp target data map(to: v1[0:N], v2[:N]) map(from: p0[0:N])
vec_mult (p0, v1, v2, N);
}
int main ()
{
double *p1 = (double *) malloc (MAX * sizeof (double));
double *p2 = (double *) malloc (MAX * sizeof (double));
double *v1 = (double *) malloc (MAX * sizeof (double));
double *v2 = (double *) malloc (MAX * sizeof (double));
foo_ref (p1, v1, v2, MAX);
foo (p2, v1, v2, MAX);
check (p1, p2, MAX);
free (p1);
free (p2);
free (v1);
free (v2);
return 0;
}
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