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
  27 IMPL (strncasecmp, 1)
  28
  29 static void
  30 do_one_test (json_ctx_t *json_ctx, impl_t *impl, const char *s1,
  31              const char *s2, size_t n, int exp_result)
  32 {
  33   size_t i, iters = INNER_LOOP_ITERS8;
  34   timing_t start, stop, cur;
  35
  36   TIMING_NOW (start);
  37   for (i = 0; i < iters; ++i)
  38     {
  39       CALL (impl, s1, s2, n);
  40     }
  41   TIMING_NOW (stop);
  42
  43   TIMING_DIFF (cur, start, stop);
  44
  45   json_element_double (json_ctx, (double) cur / (double) iters);
  46 }
  47
  48 static void
  49 do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t n,
  50          size_t len, int max_char, int exp_result)
  51 {
  52   size_t i;
  53   char *s1, *s2;
  54
  55   if (len == 0)
  56     return;
  57
  58   align1 &= 7;
  59   if (align1 + len + 1 >= page_size)
  60     return;
  61
  62   align2 &= 7;
  63   if (align2 + len + 1 >= page_size)
  64     return;
  65
  66   s1 = (char *) (buf1 + align1);
  67   s2 = (char *) (buf2 + align2);
  68
  69   for (i = 0; i < len; i++)
  70     {
  71       s1[i] = toupper (1 + 23 * i % max_char);
  72       s2[i] = tolower (s1[i]);
  73     }
  74
  75   s1[len] = s2[len] = 0;
  76   s1[len + 1] = 23;
  77   s2[len + 1] = 24 + exp_result;
  78   if ((s2[len - 1] == 'z' && exp_result == -1)
  79       || (s2[len - 1] == 'a' && exp_result == 1))
  80     s1[len - 1] += exp_result;
  81   else
  82     s2[len - 1] -= exp_result;
  83
  84   json_element_object_begin (json_ctx);
  85   json_attr_uint (json_ctx, "length", len);
  86   json_attr_uint (json_ctx, "n", n);
  87   json_attr_uint (json_ctx, "align1", align1);
  88   json_attr_uint (json_ctx, "align2", align2);
  89   json_attr_uint (json_ctx, "max_char", max_char);
  90   json_array_begin (json_ctx, "timings");
  91
  92   FOR_EACH_IMPL (impl, 0)
  93     do_one_test (json_ctx, impl, s1, s2, n, exp_result);
  94
  95   json_array_end (json_ctx);
  96   json_element_object_end (json_ctx);
  97 }
  98
  99 int
 100 test_main (void)
 101 {
 102   json_ctx_t json_ctx;
 103   size_t i;
 104
 105   test_init ();
 106
 107   json_init (&json_ctx, 0, stdout);
 108
 109   json_document_begin (&json_ctx);
 110   json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
 111
 112   json_attr_object_begin (&json_ctx, "functions");
 113   json_attr_object_begin (&json_ctx, TEST_NAME);
 114   json_attr_string (&json_ctx, "bench-variant", "");
 115
 116   json_array_begin (&json_ctx, "ifuncs");
 117   FOR_EACH_IMPL (impl, 0)
 118     json_element_string (&json_ctx, impl->name);
 119   json_array_end (&json_ctx);
 120
 121   json_array_begin (&json_ctx, "results");
 122
 123   for (i = 1; i < 16; ++i)
 124     {
 125       do_test (&json_ctx, i, i, i - 1, i, 127, 0);
 126
 127       do_test (&json_ctx, i, i, i, i, 127, 0);
 128       do_test (&json_ctx, i, i, i, i, 127, 1);
 129       do_test (&json_ctx, i, i, i, i, 127, -1);
 130
 131       do_test (&json_ctx, i, i, i + 1, i, 127, 0);
 132       do_test (&json_ctx, i, i, i + 1, i, 127, 1);
 133       do_test (&json_ctx, i, i, i + 1, i, 127, -1);
 134     }
 135
 136   for (i = 1; i < 10; ++i)
 137     {
 138       do_test (&json_ctx, 0, 0, (2 << i) - 1, 2 << i, 127, 0);
 139       do_test (&json_ctx, 0, 0, 2 << i, 2 << i, 254, 0);
 140       do_test (&json_ctx, 0, 0, (2 << i) + 1, 2 << i, 127, 0);
 141
 142       do_test (&json_ctx, 0, 0, (2 << i) + 1, 2 << i, 254, 0);
 143
 144       do_test (&json_ctx, 0, 0, 2 << i, 2 << i, 127, 1);
 145       do_test (&json_ctx, 0, 0, (2 << i) + 10, 2 << i, 127, 1);
 146
 147       do_test (&json_ctx, 0, 0, 2 << i, 2 << i, 254, 1);
 148       do_test (&json_ctx, 0, 0, (2 << i) + 10, 2 << i, 254, 1);
 149
 150       do_test (&json_ctx, 0, 0, 2 << i, 2 << i, 127, -1);
 151       do_test (&json_ctx, 0, 0, (2 << i) + 10, 2 << i, 127, -1);
 152
 153       do_test (&json_ctx, 0, 0, 2 << i, 2 << i, 254, -1);
 154       do_test (&json_ctx, 0, 0, (2 << i) + 10, 2 << i, 254, -1);
 155     }
 156
 157   for (i = 1; i < 8; ++i)
 158     {
 159       do_test (&json_ctx, i, 2 * i, (8 << i) - 1, 8 << i, 127, 0);
 160       do_test (&json_ctx, i, 2 * i, 8 << i, 8 << i, 127, 0);
 161       do_test (&json_ctx, i, 2 * i, (8 << i) + 100, 8 << i, 127, 0);
 162
 163       do_test (&json_ctx, 2 * i, i, (8 << i) - 1, 8 << i, 254, 0);
 164       do_test (&json_ctx, 2 * i, i, 8 << i, 8 << i, 254, 0);
 165       do_test (&json_ctx, 2 * i, i, (8 << i) + 100, 8 << i, 254, 0);
 166
 167       do_test (&json_ctx, i, 2 * i, 8 << i, 8 << i, 127, 1);
 168       do_test (&json_ctx, i, 2 * i, (8 << i) + 100, 8 << i, 127, 1);
 169
 170       do_test (&json_ctx, 2 * i, i, 8 << i, 8 << i, 254, 1);
 171       do_test (&json_ctx, 2 * i, i, (8 << i) + 100, 8 << i, 254, 1);
 172
 173       do_test (&json_ctx, i, 2 * i, 8 << i, 8 << i, 127, -1);
 174       do_test (&json_ctx, i, 2 * i, (8 << i) + 100, 8 << i, 127, -1);
 175
 176       do_test (&json_ctx, 2 * i, i, 8 << i, 8 << i, 254, -1);
 177       do_test (&json_ctx, 2 * i, i, (8 << i) + 100, 8 << i, 254, -1);
 178     }
 179
 180   json_array_end (&json_ctx);
 181   json_attr_object_end (&json_ctx);
 182   json_attr_object_end (&json_ctx);
 183   json_document_end (&json_ctx);
 184
 185   return ret;
 186 }
 187
 188 #include <support/test-driver.c>