1/*
2 * memcmp test.
3 *
4 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 * See https://llvm.org/LICENSE.txt for license information.
6 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 */
8
9#include <stdint.h>
10#include <stdio.h>
11#include <stdlib.h>
12#include <string.h>
13#include "stringlib.h"
14
15static const struct fun
16{
17 const char *name;
18 int (*fun)(const void *s1, const void *s2, size_t n);
19} funtab[] = {
20#define F(x) {#x, x},
21F(memcmp)
22#if __aarch64__
23F(__memcmp_aarch64)
24# if __ARM_FEATURE_SVE
25F(__memcmp_aarch64_sve)
26# endif
27#endif
28#undef F
29 {0, 0}
30};
31
32static int test_status;
33#define ERR(...) (test_status=1, printf(__VA_ARGS__))
34
35#define A 32
36#define LEN 250000
37static unsigned char s1buf[LEN+2*A];
38static unsigned char s2buf[LEN+2*A];
39
40static void *alignup(void *p)
41{
42 return (void*)(((uintptr_t)p + A-1) & -A);
43}
44
45static void test(const struct fun *fun, int s1align, int s2align, int len, int diffpos)
46{
47 unsigned char *src1 = alignup(p: s1buf);
48 unsigned char *src2 = alignup(p: s2buf);
49 unsigned char *s1 = src1 + s1align;
50 unsigned char *s2 = src2 + s2align;
51 int r;
52
53 if (len > LEN || s1align >= A || s2align >= A)
54 abort();
55 if (diffpos && diffpos >= len)
56 abort();
57
58 for (int i = 0; i < len+A; i++)
59 src1[i] = src2[i] = '?';
60 for (int i = 0; i < len; i++)
61 s1[i] = s2[i] = 'a' + i%23;
62 if (diffpos)
63 s1[diffpos]++;
64
65 r = fun->fun(s1, s2, len);
66
67 if ((!diffpos && r != 0) || (diffpos && r == 0)) {
68 ERR("%s(align %d, align %d, %d) failed, returned %d\n",
69 fun->name, s1align, s2align, len, r);
70 ERR("src1: %.*s\n", s1align+len+1, src1);
71 ERR("src2: %.*s\n", s2align+len+1, src2);
72 }
73}
74
75int main()
76{
77 int r = 0;
78 for (int i=0; funtab[i].name; i++) {
79 test_status = 0;
80 for (int d = 0; d < A; d++)
81 for (int s = 0; s < A; s++) {
82 int n;
83 for (n = 0; n < 100; n++) {
84 test(fun: funtab+i, s1align: d, s2align: s, len: n, diffpos: 0);
85 test(fun: funtab+i, s1align: d, s2align: s, len: n, diffpos: n / 2);
86 }
87 for (; n < LEN; n *= 2) {
88 test(fun: funtab+i, s1align: d, s2align: s, len: n, diffpos: 0);
89 test(fun: funtab+i, s1align: d, s2align: s, len: n, diffpos: n / 2);
90 }
91 }
92 printf(format: "%s %s\n", test_status ? "FAIL" : "PASS", funtab[i].name);
93 if (test_status)
94 r = -1;
95 }
96 return r;
97}
98

source code of libc/AOR_v20.02/string/test/memcmp.c