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/* { dg-do run } */
#include <stdlib.h>
const int ROWS = 5;
const int COLS = 5;
void init (int Q[][COLS], const int rows, const int cols)
{
int i, j;
for (i = 0; i < rows; i++)
for (j = 0; j < cols; j++)
Q[i][j] = (i + 1) * 100 + (j + 1);
}
void check (int a[][COLS], int b[][COLS], const int rows, const int cols)
{
int i, j;
for (i = 0; i < rows; i++)
for (j = 0; j < cols; j++)
if (a[i][j] != b[i][j])
abort ();
}
void gramSchmidt_ref (int Q[][COLS], const int rows, const int cols)
{
int i, k;
for (k = 0; k < cols; k++)
{
int tmp = 0;
for (i = 0; i < rows; i++)
tmp += (Q[i][k] * Q[i][k]);
for (i = 0; i < rows; i++)
Q[i][k] *= tmp;
}
}
void gramSchmidt (int Q[][COLS], const int rows, const int cols)
{
int i, k;
#pragma omp target data map(Q[0:rows][0:cols]) map(to:COLS)
for (k = 0; k < cols; k++)
{
int tmp = 0;
#pragma omp target map(tofrom:tmp)
#pragma omp parallel for reduction(+:tmp)
for (i = 0; i < rows; i++)
tmp += (Q[i][k] * Q[i][k]);
#pragma omp target
#pragma omp parallel for
for (i = 0; i < rows; i++)
Q[i][k] *= tmp;
}
}
int main ()
{
int (*Q1)[COLS] = (int(*)[COLS]) malloc (ROWS * COLS * sizeof (int));
int (*Q2)[COLS] = (int(*)[COLS]) malloc (ROWS * COLS * sizeof (int));
init (Q1, ROWS, COLS);
init (Q2, ROWS, COLS);
gramSchmidt_ref (Q1, ROWS, COLS);
gramSchmidt (Q2, ROWS, COLS);
check (Q1, Q2, ROWS, COLS);
free (Q1);
free (Q2);
return 0;
}
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