diff options
Diffstat (limited to 'tools/testing/selftests/powerpc/stringloops/memcmp.c')
-rw-r--r-- | tools/testing/selftests/powerpc/stringloops/memcmp.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/stringloops/memcmp.c b/tools/testing/selftests/powerpc/stringloops/memcmp.c new file mode 100644 index 000000000000..17417dd70708 --- /dev/null +++ b/tools/testing/selftests/powerpc/stringloops/memcmp.c @@ -0,0 +1,103 @@ +#include <malloc.h> +#include <stdlib.h> +#include <string.h> +#include "../utils.h" + +#define SIZE 256 +#define ITERATIONS 10000 + +int test_memcmp(const void *s1, const void *s2, size_t n); + +/* test all offsets and lengths */ +static void test_one(char *s1, char *s2) +{ + unsigned long offset, size; + + for (offset = 0; offset < SIZE; offset++) { + for (size = 0; size < (SIZE-offset); size++) { + int x, y; + unsigned long i; + + y = memcmp(s1+offset, s2+offset, size); + x = test_memcmp(s1+offset, s2+offset, size); + + if (((x ^ y) < 0) && /* Trick to compare sign */ + ((x | y) != 0)) { /* check for zero */ + printf("memcmp returned %d, should have returned %d (offset %ld size %ld)\n", x, y, offset, size); + + for (i = offset; i < offset+size; i++) + printf("%02x ", s1[i]); + printf("\n"); + + for (i = offset; i < offset+size; i++) + printf("%02x ", s2[i]); + printf("\n"); + abort(); + } + } + } +} + +static int testcase(void) +{ + char *s1; + char *s2; + unsigned long i; + + s1 = memalign(128, SIZE); + if (!s1) { + perror("memalign"); + exit(1); + } + + s2 = memalign(128, SIZE); + if (!s2) { + perror("memalign"); + exit(1); + } + + srandom(1); + + for (i = 0; i < ITERATIONS; i++) { + unsigned long j; + unsigned long change; + + for (j = 0; j < SIZE; j++) + s1[j] = random(); + + memcpy(s2, s1, SIZE); + + /* change one byte */ + change = random() % SIZE; + s2[change] = random() & 0xff; + + test_one(s1, s2); + } + + srandom(1); + + for (i = 0; i < ITERATIONS; i++) { + unsigned long j; + unsigned long change; + + for (j = 0; j < SIZE; j++) + s1[j] = random(); + + memcpy(s2, s1, SIZE); + + /* change multiple bytes, 1/8 of total */ + for (j = 0; j < SIZE / 8; j++) { + change = random() % SIZE; + s2[change] = random() & 0xff; + } + + test_one(s1, s2); + } + + return 0; +} + +int main(void) +{ + return test_harness(testcase, "memcmp"); +} |