57 lines
868 B
C
57 lines
868 B
C
/* { 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;
|
|
}
|