benchtests/bench-strncasecmp.c

   1 /* Measure strncasecmp 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 #include <ctype.h>
  20 #define TEST_MAIN
  21 #define TEST_NAME "strncasecmp"
  22 #include "bench-string.h"
  23 #include "json-lib.h"
  24
  25 typedef int (*proto_t) (const char *, const char *, size_t);
  26 static int simple_strncasecmp (const char *, const char *, size_t);
  27
  28 IMPL (simple_strncasecmp, 0)
  29 IMPL (strncasecmp, 1)
  30
  31 static int
  32 simple_strncasecmp (const char *s1, const char *s2, size_t n)
  33 {
  34   int ret;
  35
  36   if (n == 0)
  37     return 0;
  38
  39   while ((ret = ((unsigned char) tolower (*s1)
  40                  - (unsigned char) tolower (*s2))) == 0
  41          && *s1++)
  42     {
  43       if (--n == 0)
  44         return 0;
  45       ++s2;
  46     }
  47   return ret;
  48 }
  49
  50 static void
  51 do_one_test (json_ctx_t *json_ctx, impl_t *impl, const char *s1,
  52              const char *s2, size_t n, int exp_result)
  53 {
  54   size_t i, iters = INNER_LOOP_ITERS;
  55   timing_t start, stop, cur;
  56
  57   TIMING_NOW (start);
  58   for (i = 0; i < iters; ++i)
  59     {
  60       CALL (impl, s1, s2, n);
  61     }
  62   TIMING_NOW (stop);
  63
  64   TIMING_DIFF (cur, start, stop);
  65
  66   json_element_double (json_ctx, (double) cur / (double) iters);
  67 }
  68
  69 static void
  70 do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t n,
  71          size_t len, int max_char, int exp_result)
  72 {
  73   size_t i;
  74   char *s1, *s2;
  75
  76   if (len == 0)
  77     return;
  78
  79   align1 &= 7;
  80   if (align1 + len + 1 >= page_size)
  81     return;
  82
  83   align2 &= 7;
  84   if (align2 + len + 1 >= page_size)
  85     return;
  86
  87   s1 = (char *) (buf1 + align1);
  88   s2 = (char *) (buf2 + align2);
  89
  90   for (i = 0; i < len; i++)
  91     {
  92       s1[i] = toupper (1 + 23 * i % max_char);
  93       s2[i] = tolower (s1[i]);
  94     }
  95
  96   s1[len] = s2[len] = 0;
  97   s1[len + 1] = 23;
  98   s2[len + 1] = 24 + exp_result;
  99   if ((s2[len - 1] == 'z' && exp_result == -1)
 100       || (s2[len - 1] == 'a' && exp_result == 1))
 101     s1[len - 1] += exp_result;
 102   else
 103     s2[len - 1] -= exp_result;
 104
 105   json_element_object_begin (json_ctx);
 106   json_attr_uint (json_ctx, "length", len);
 107   json_attr_uint (json_ctx, "n", n);
 108   json_attr_uint (json_ctx, "align1", align1);
 109   json_attr_uint (json_ctx, "align2", align2);
 110   json_attr_uint (json_ctx, "max_char", max_char);
 111   json_array_begin (json_ctx, "timings");
 112
 113   FOR_EACH_IMPL (impl, 0)
 114     do_one_test (json_ctx, impl, s1, s2, n, exp_result);
 115
 116   json_array_end (json_ctx);
 117   json_element_object_end (json_ctx);
 118 }
 119
 120 int
 121 test_main (void)
 122 {
 123   json_ctx_t json_ctx;
 124   size_t i;
 125
 126   test_init ();
 127
 128   json_init (&json_ctx, 0, stdout);
 129
 130   json_document_begin (&json_ctx);
 131   json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
 132
 133   json_attr_object_begin (&json_ctx, "functions");
 134   json_attr_object_begin (&json_ctx, TEST_NAME);
 135   json_attr_string (&json_ctx, "bench-variant", "");
 136
 137   json_array_begin (&json_ctx, "ifuncs");
 138   FOR_EACH_IMPL (impl, 0)
 139     json_element_string (&json_ctx, impl->name);
 140   json_array_end (&json_ctx);
 141
 142   json_array_begin (&json_ctx, "results");
 143
 144   for (i = 1; i < 16; ++i)
 145     {
 146       do_test (&json_ctx, i, i, i - 1, i, 127, 0);
 147
 148       do_test (&json_ctx, i, i, i, i, 127, 0);
 149       do_test (&json_ctx, i, i, i, i, 127, 1);
 150       do_test (&json_ctx, i, i, i, i, 127, -1);
 151
 152       do_test (&json_ctx, i, i, i + 1, i, 127, 0);
 153       do_test (&json_ctx, i, i, i + 1, i, 127, 1);
 154       do_test (&json_ctx, i, i, i + 1, i, 127, -1);
 155     }
 156
 157   for (i = 1; i < 10; ++i)
 158     {
 159       do_test (&json_ctx, 0, 0, (2 << i) - 1, 2 << i, 127, 0);
 160       do_test (&json_ctx, 0, 0, 2 << i, 2 << i, 254, 0);
 161       do_test (&json_ctx, 0, 0, (2 << i) + 1, 2 << i, 127, 0);
 162
 163       do_test (&json_ctx, 0, 0, (2 << i) + 1, 2 << i, 254, 0);
 164
 165       do_test (&json_ctx, 0, 0, 2 << i, 2 << i, 127, 1);
 166       do_test (&json_ctx, 0, 0, (2 << i) + 10, 2 << i, 127, 1);
 167
 168       do_test (&json_ctx, 0, 0, 2 << i, 2 << i, 254, 1);
 169       do_test (&json_ctx, 0, 0, (2 << i) + 10, 2 << i, 254, 1);
 170
 171       do_test (&json_ctx, 0, 0, 2 << i, 2 << i, 127, -1);
 172       do_test (&json_ctx, 0, 0, (2 << i) + 10, 2 << i, 127, -1);
 173
 174       do_test (&json_ctx, 0, 0, 2 << i, 2 << i, 254, -1);
 175       do_test (&json_ctx, 0, 0, (2 << i) + 10, 2 << i, 254, -1);
 176     }
 177
 178   for (i = 1; i < 8; ++i)
 179     {
 180       do_test (&json_ctx, i, 2 * i, (8 << i) - 1, 8 << i, 127, 0);
 181       do_test (&json_ctx, i, 2 * i, 8 << i, 8 << i, 127, 0);
 182       do_test (&json_ctx, i, 2 * i, (8 << i) + 100, 8 << i, 127, 0);
 183
 184       do_test (&json_ctx, 2 * i, i, (8 << i) - 1, 8 << i, 254, 0);
 185       do_test (&json_ctx, 2 * i, i, 8 << i, 8 << i, 254, 0);
 186       do_test (&json_ctx, 2 * i, i, (8 << i) + 100, 8 << i, 254, 0);
 187
 188       do_test (&json_ctx, i, 2 * i, 8 << i, 8 << i, 127, 1);
 189       do_test (&json_ctx, i, 2 * i, (8 << i) + 100, 8 << i, 127, 1);
 190
 191       do_test (&json_ctx, 2 * i, i, 8 << i, 8 << i, 254, 1);
 192       do_test (&json_ctx, 2 * i, i, (8 << i) + 100, 8 << i, 254, 1);
 193
 194       do_test (&json_ctx, i, 2 * i, 8 << i, 8 << i, 127, -1);
 195       do_test (&json_ctx, i, 2 * i, (8 << i) + 100, 8 << i, 127, -1);
 196
 197       do_test (&json_ctx, 2 * i, i, 8 << i, 8 << i, 254, -1);
 198       do_test (&json_ctx, 2 * i, i, (8 << i) + 100, 8 << i, 254, -1);
 199     }
 200
 201   json_array_end (&json_ctx);
 202   json_attr_object_end (&json_ctx);
 203   json_attr_object_end (&json_ctx);
 204   json_document_end (&json_ctx);
 205
 206   return ret;
 207 }
 208
 209 #include <support/test-driver.c>