Viewing file:  simd-5.c (1.33 KB) -rw-r--r--
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/* { dg-do run } */
/* { dg-additional-options "-msse2" { target sse2_runtime } } */
/* { dg-additional-options "-mavx" { target avx_runtime } } */
#define N 128
#define M 16
#define EPS 0.0000000000000001
#define SAFELEN 16
#include <stdlib.h>
void init(double a[N][N], double b[N][N], int n)
{
int i, j, s = -1;
for (i = 0; i < n; i++)
{
for (j = 0; j < n; j++)
{
a[i][j] = i * j * s;
b[i][j] = i + j + s;
s = -s;
}
}
}
void work( double a[N][N], double b[N][N], double c[N][N], int n )
{
int i, j;
double tmp;
#pragma omp for simd collapse(2) private(tmp)
for (i = 0; i < n; i++)
{
for (j = 0; j < n; j++)
{
tmp = a[i][j] + b[i][j];
c[i][j] = tmp;
}
}
}
void work_ref( double a[N][N], double b[N][N], double c[N][N], int n )
{
int i, j;
double tmp;
for (i = 0; i < n; i++)
{
for (j = 0; j < n; j++)
{
tmp = a[i][j] + b[i][j];
c[i][j] = tmp;
}
}
}
void check (double a[N][N], double b[N][N])
{
int i, j;
for (i = 0; i < N; i++)
for (j = 0; j < N; j++)
if (a[i][j] - b[i][j] > EPS || b[i][j] - a[i][j] > EPS)
abort ();
}
int main ()
{
double a[N][N], b[N][N], c[N][N], c_ref[N][N];
init(a, b, N);
work(a, b, c, N);
work_ref(a, b, c_ref, N);
check(c, c_ref);
return 0;
}
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