71 lines
1.1 KiB
C
71 lines
1.1 KiB
C
/* { dg-do run } */
|
|
|
|
#include <stdlib.h>
|
|
|
|
#define EPS 0.0001
|
|
#define N 1024*1024
|
|
|
|
void init (float B[], float C[], int n)
|
|
{
|
|
int i;
|
|
for (i = 0; i < n; i++)
|
|
{
|
|
B[i] = 0.1 * i;
|
|
C[i] = 0.01 * i * i;
|
|
}
|
|
}
|
|
|
|
float dotprod_ref (float B[], float C[], int n)
|
|
{
|
|
int i;
|
|
float sum = 0.0;
|
|
|
|
for (i = 0; i < n; i++)
|
|
sum += B[i] * C[i];
|
|
|
|
return sum;
|
|
}
|
|
|
|
float dotprod (float B[], float C[], int n)
|
|
{
|
|
int i;
|
|
float sum = 0;
|
|
|
|
#pragma omp target map(to: B[0:n], C[0:n]) map(tofrom:sum)
|
|
#pragma omp teams num_teams(8) thread_limit(16) reduction(+:sum)
|
|
#pragma omp distribute parallel for reduction(+:sum) \
|
|
dist_schedule(static, 1024) \
|
|
schedule(static, 64)
|
|
for (i = 0; i < n; i++)
|
|
sum += B[i] * C[i];
|
|
|
|
return sum;
|
|
}
|
|
|
|
void check (float a, float b)
|
|
{
|
|
float err = (b == 0.0) ? a : (a - b) / b;
|
|
if (((err > 0) ? err : -err) > EPS)
|
|
abort ();
|
|
}
|
|
|
|
int main ()
|
|
{
|
|
float *v1 = (float *) malloc (N * sizeof (float));
|
|
float *v2 = (float *) malloc (N * sizeof (float));
|
|
|
|
float p1, p2;
|
|
|
|
init (v1, v2, N);
|
|
|
|
p1 = dotprod_ref (v1, v2, N);
|
|
p2 = dotprod (v1, v2, N);
|
|
|
|
check (p1, p2);
|
|
|
|
free (v1);
|
|
free (v2);
|
|
|
|
return 0;
|
|
}
|