libc/AOR_v20.02/string/test/memcmp.c

   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
  40 static void *alignup(void *p)
  41 {
  42         return (void*)(((uintptr_t)p + A-1) & -A);
  43 }
  44
  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
  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 }