Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / tools / testing / selftests / powerpc / stringloops / memcmp.c

diff --git a/kernel/tools/testing/selftests/powerpc/stringloops/memcmp.c b/kernel/tools/testing/selftests/powerpc/stringloops/memcmp.c
new file mode 100644 (file)
index 0000000..17417dd
--- /dev/null
+++ b/kernel/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");
+}