1 // SPDX-License-Identifier: GPL-2.0
8 #define ITERATIONS 10000
10 int test_memcmp(const void *s1, const void *s2, size_t n);
12 /* test all offsets and lengths */
13 static void test_one(char *s1, char *s2)
15 unsigned long offset, size;
17 for (offset = 0; offset < SIZE; offset++) {
18 for (size = 0; size < (SIZE-offset); size++) {
22 y = memcmp(s1+offset, s2+offset, size);
23 x = test_memcmp(s1+offset, s2+offset, size);
25 if (((x ^ y) < 0) && /* Trick to compare sign */
26 ((x | y) != 0)) { /* check for zero */
27 printf("memcmp returned %d, should have returned %d (offset %ld size %ld)\n", x, y, offset, size);
29 for (i = offset; i < offset+size; i++)
30 printf("%02x ", s1[i]);
33 for (i = offset; i < offset+size; i++)
34 printf("%02x ", s2[i]);
42 static int testcase(void)
48 s1 = memalign(128, SIZE);
54 s2 = memalign(128, SIZE);
62 for (i = 0; i < ITERATIONS; i++) {
66 for (j = 0; j < SIZE; j++)
72 change = random() % SIZE;
73 s2[change] = random() & 0xff;
80 for (i = 0; i < ITERATIONS; i++) {
84 for (j = 0; j < SIZE; j++)
89 /* change multiple bytes, 1/8 of total */
90 for (j = 0; j < SIZE / 8; j++) {
91 change = random() % SIZE;
92 s2[change] = random() & 0xff;
103 return test_harness(testcase, "memcmp");