benchtests/bench-strcasestr.c

   1 /* Measure strcasestr functions.
   2    Copyright (C) 2013-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #define TEST_MAIN
  20 #define TEST_NAME "strcasestr"
  21 #include "bench-string.h"
  22
  23
  24 #define STRCASESTR simple_strcasestr
  25 #define NO_ALIAS
  26 #define __strncasecmp strncasecmp
  27 #define __strnlen strnlen
  28 #include "../string/strcasestr.c"
  29
  30 typedef char *(*proto_t) (const char *, const char *);
  31
  32 IMPL (simple_strcasestr, 0)
  33 IMPL (strcasestr, 1)
  34
  35
  36 static void
  37 do_one_test (impl_t *impl, const char *s1, const char *s2, char *exp_result)
  38 {
  39   size_t i, iters = INNER_LOOP_ITERS_SMALL;
  40   timing_t start, stop, cur;
  41
  42   TIMING_NOW (start);
  43   for (i = 0; i < iters; ++i)
  44     {
  45       CALL (impl, s1, s2);
  46     }
  47   TIMING_NOW (stop);
  48
  49   TIMING_DIFF (cur, start, stop);
  50
  51   TIMING_PRINT_MEAN ((double) cur, (double) iters);
  52 }
  53
  54
  55 static void
  56 do_test (size_t align1, size_t align2, size_t len1, size_t len2,
  57          int fail)
  58 {
  59   char *s1 = (char *) (buf1 + align1);
  60   char *s2 = (char *) (buf2 + align2);
  61
  62   static const char d[] = "1234567890abcxyz";
  63 #define dl (sizeof (d) - 1)
  64   char *ss2 = s2;
  65   for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
  66     {
  67       size_t t = l > dl ? dl : l;
  68       ss2 = mempcpy (ss2, d, t);
  69     }
  70   s2[len2] = '\0';
  71
  72   if (fail)
  73     {
  74       char *ss1 = s1;
  75       for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0)
  76         {
  77           size_t t = l > dl ? dl : l;
  78           memcpy (ss1, d, t);
  79           ++ss1[len2 > 7 ? 7 : len2 - 1];
  80           ss1 += t;
  81         }
  82     }
  83   else
  84     {
  85       memset (s1, '0', len1);
  86       for (size_t i = 0; i < len2; ++i)
  87         s1[len1 - len2 + i] = toupper (s2[i]);
  88     }
  89   s1[len1] = '\0';
  90
  91   printf ("Length %4zd/%zd, alignment %2zd/%2zd, %s:",
  92           len1, len2, align1, align2, fail ? "fail" : "found");
  93
  94   FOR_EACH_IMPL (impl, 0)
  95     do_one_test (impl, s1, s2, fail ? NULL : s1 + len1 - len2);
  96
  97   putchar ('\n');
  98 }
  99
 100 static int
 101 test_main (void)
 102 {
 103   test_init ();
 104
 105   printf ("%23s", "");
 106   FOR_EACH_IMPL (impl, 0)
 107     printf ("\t%s", impl->name);
 108   putchar ('\n');
 109
 110   for (size_t klen = 2; klen < 32; ++klen)
 111     for (size_t hlen = 2 * klen; hlen < 16 * klen; hlen += klen)
 112       {
 113         do_test (0, 0, hlen, klen, 0);
 114         do_test (0, 0, hlen, klen, 1);
 115         do_test (0, 3, hlen, klen, 0);
 116         do_test (0, 3, hlen, klen, 1);
 117         do_test (0, 9, hlen, klen, 0);
 118         do_test (0, 9, hlen, klen, 1);
 119         do_test (0, 15, hlen, klen, 0);
 120         do_test (0, 15, hlen, klen, 1);
 121
 122         do_test (3, 0, hlen, klen, 0);
 123         do_test (3, 0, hlen, klen, 1);
 124         do_test (3, 3, hlen, klen, 0);
 125         do_test (3, 3, hlen, klen, 1);
 126         do_test (3, 9, hlen, klen, 0);
 127         do_test (3, 9, hlen, klen, 1);
 128         do_test (3, 15, hlen, klen, 0);
 129         do_test (3, 15, hlen, klen, 1);
 130
 131         do_test (9, 0, hlen, klen, 0);
 132         do_test (9, 0, hlen, klen, 1);
 133         do_test (9, 3, hlen, klen, 0);
 134         do_test (9, 3, hlen, klen, 1);
 135         do_test (9, 9, hlen, klen, 0);
 136         do_test (9, 9, hlen, klen, 1);
 137         do_test (9, 15, hlen, klen, 0);
 138         do_test (9, 15, hlen, klen, 1);
 139
 140         do_test (15, 0, hlen, klen, 0);
 141         do_test (15, 0, hlen, klen, 1);
 142         do_test (15, 3, hlen, klen, 0);
 143         do_test (15, 3, hlen, klen, 1);
 144         do_test (15, 9, hlen, klen, 0);
 145         do_test (15, 9, hlen, klen, 1);
 146         do_test (15, 15, hlen, klen, 0);
 147         do_test (15, 15, hlen, klen, 1);
 148       }
 149
 150   do_test (0, 0, page_size - 1, 16, 0);
 151   do_test (0, 0, page_size - 1, 16, 1);
 152
 153   return ret;
 154 }
 155
 156 #include <support/test-driver.c>