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