mirror of git://gcc.gnu.org/git/gcc.git
97 lines
2.2 KiB
C
97 lines
2.2 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <omp.h>
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#define MAX 1000
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void main1()
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{
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int i, N1, N2, step;
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int a[MAX], b[MAX];
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N1 = rand () % 13;
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N2 = rand () % (MAX - 51) + 50;
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step = rand () % 7 + 1;
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printf ("N1 = %d\nN2 = %d\nstep = %d\n", N1, N2, step);
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for (i = N1; i <= N2; i += step)
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a[i] = 42+ i;
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/* COUNTING UP (<). Fill in array 'b' in parallel. */
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memset (b, 0, sizeof b);
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#pragma omp parallel shared(a,b,N1,N2,step) private(i)
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{
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#pragma omp for
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for (i = N1; i < N2; i += step)
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b[i] = a[i];
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}
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/* COUNTING UP (<). Check that all the cells were filled in properly. */
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for (i = N1; i < N2; i += step)
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if (a[i] != b[i])
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abort ();
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printf ("for (i = %d; i < %d; i += %d) [OK]\n", N1, N2, step);
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/* COUNTING UP (<=). Fill in array 'b' in parallel. */
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memset (b, 0, sizeof b);
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#pragma omp parallel shared(a,b,N1,N2,step) private(i)
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{
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#pragma omp for
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for (i = N1; i <= N2; i += step)
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b[i] = a[i];
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}
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/* COUNTING UP (<=). Check that all the cells were filled in properly. */
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for (i = N1; i <= N2; i += step)
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if (a[i] != b[i])
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abort ();
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printf ("for (i = %d; i <= %d; i += %d) [OK]\n", N1, N2, step);
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/* COUNTING DOWN (>). Fill in array 'b' in parallel. */
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memset (b, 0, sizeof b);
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#pragma omp parallel shared(a,b,N1,N2,step) private(i)
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{
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#pragma omp for
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for (i = N2; i > N1; i -= step)
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b[i] = a[i];
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}
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/* COUNTING DOWN (>). Check that all the cells were filled in properly. */
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for (i = N2; i > N1; i -= step)
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if (a[i] != b[i])
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abort ();
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printf ("for (i = %d; i > %d; i -= %d) [OK]\n", N2, N1, step);
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/* COUNTING DOWN (>=). Fill in array 'b' in parallel. */
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memset (b, 0, sizeof b);
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#pragma omp parallel shared(a,b,N1,N2,step) private(i)
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{
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#pragma omp for
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for (i = N2; i >= N1; i -= step)
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b[i] = a[i];
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}
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/* COUNTING DOWN (>=). Check that all the cells were filled in properly. */
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for (i = N2; i >= N1; i -= step)
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if (a[i] != b[i])
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abort ();
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printf ("for (i = %d; i >= %d; i -= %d) [OK]\n", N2, N1, step);
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}
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int
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main ()
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{
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int i;
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srand (0);
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for (i = 0; i < 10; ++i)
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main1();
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return 0;
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}
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