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
15 static 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},
21 F(memcmp)
22 #if __aarch64__
23 F(__memcmp_aarch64)
24 # if __ARM_FEATURE_SVE
25 F(__memcmp_aarch64_sve)
26 # endif
27 #endif
28 #undef F
29 {0, 0}
30 };
31
32 static int test_status;
33 #define ERR(...) (test_status=1, printf(__VA_ARGS__))
34
35 #define A 32
36 #define LEN 250000
37 static unsigned char s1buf[LEN+2*A];
38 static unsigned char s2buf[LEN+2*A];
39
alignup(void * p)40 static void *alignup(void *p)
41 {
42 return (void*)(((uintptr_t)p + A-1) & -A);
43 }
44
test(const struct fun * fun,int s1align,int s2align,int len,int diffpos)45 static void test(const struct fun *fun, int s1align, int s2align, int len, int diffpos)
46 {
47 unsigned char *src1 = alignup(s1buf);
48 unsigned char *src2 = alignup(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
main()75 int 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(funtab+i, d, s, n, 0);
85 test(funtab+i, d, s, n, n / 2);
86 }
87 for (; n < LEN; n *= 2) {
88 test(funtab+i, d, s, n, 0);
89 test(funtab+i, d, s, n, n / 2);
90 }
91 }
92 printf("%s %s\n", test_status ? "FAIL" : "PASS", funtab[i].name);
93 if (test_status)
94 r = -1;
95 }
96 return r;
97 }
98