diff options
Diffstat (limited to 'libgomp/testsuite/libgomp.c/appendix-a/a.16.1.c')
-rw-r--r-- | libgomp/testsuite/libgomp.c/appendix-a/a.16.1.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/libgomp/testsuite/libgomp.c/appendix-a/a.16.1.c b/libgomp/testsuite/libgomp.c/appendix-a/a.16.1.c new file mode 100644 index 00000000000..28a994a28fa --- /dev/null +++ b/libgomp/testsuite/libgomp.c/appendix-a/a.16.1.c @@ -0,0 +1,47 @@ +/* { dg-do run } */ + +#include <stdio.h> + +float +work1 (int i) +{ + return 1.0 * i; +} + +float +work2 (int i) +{ + return 2.0 * i; +} + +void +a16 (float *x, float *y, int *index, int n) +{ + int i; +#pragma omp parallel for shared(x, y, index, n) + for (i = 0; i < n; i++) + { +#pragma omp atomic + x[index[i]] += work1 (i); + y[i] += work2 (i); + } +} +int +main () +{ + float x[1000]; + float y[10000]; + int index[10000]; + int i; + for (i = 0; i < 10000; i++) + { + index[i] = i % 1000; + y[i] = 0.0; + } + for (i = 0; i < 1000; i++) + x[i] = 0.0; + a16 (x, y, index, 10000); + for (i = 0; i < 10; i++) + printf ("x[%d] = %f, y[%d] = %f\n", i, x[i], i, y[i]); + return 0; +} |