benchtests/bench-strcasecmp.c

   1 /* Measure strcasecmp functions.
   2    Copyright (C) 2013-2022 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 "strcasecmp"
  22 #include "bench-string.h"
  23 #include "json-lib.h"
  24
  25 typedef int (*proto_t) (const char *, const char *);
  26 static int simple_strcasecmp (const char *, const char *);
  27
  28 IMPL (simple_strcasecmp, 0)
  29 IMPL (strcasecmp, 1)
  30
  31 static int
  32 simple_strcasecmp (const char *s1, const char *s2)
  33 {
  34   int ret;
  35
  36   while ((ret = ((unsigned char) tolower (*s1)
  37                  - (unsigned char) tolower (*s2))) == 0
  38          && *s1++)
  39     ++s2;
  40   return ret;
  41 }
  42
  43 static void
  44 do_one_test (json_ctx_t *json_ctx, impl_t *impl, const char *s1,
  45              const char *s2, int exp_result)
  46 {
  47   size_t i, iters = INNER_LOOP_ITERS;
  48   timing_t start, stop, cur;
  49   int result = CALL (impl, s1, s2);
  50   if ((exp_result == 0 && result != 0)
  51       || (exp_result < 0 && result >= 0)
  52       || (exp_result > 0 && result <= 0))
  53     {
  54       error (0, 0, "Wrong result in function %s %d %d", impl->name,
  55              result, exp_result);
  56       ret = 1;
  57       return;
  58     }
  59
  60   TIMING_NOW (start);
  61   for (i = 0; i < iters; ++i)
  62     {
  63       CALL (impl, s1, s2);
  64     }
  65   TIMING_NOW (stop);
  66
  67   TIMING_DIFF (cur, start, stop);
  68
  69   json_element_double (json_ctx, (double) cur / (double) iters);
  70 }
  71
  72 static void
  73 do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len,
  74          int max_char, int exp_result)
  75 {
  76   size_t i;
  77   char *s1, *s2;
  78
  79   if (len == 0)
  80     return;
  81
  82   align1 &= 7;
  83   if (align1 + len + 1 >= page_size)
  84     return;
  85
  86   align2 &= 7;
  87   if (align2 + len + 1 >= page_size)
  88     return;
  89
  90   json_element_object_begin (json_ctx);
  91   json_attr_uint (json_ctx, "length", len);
  92   json_attr_uint (json_ctx, "align1", align1);
  93   json_attr_uint (json_ctx, "align2", align2);
  94   json_attr_uint (json_ctx, "max_char", max_char);
  95   json_array_begin (json_ctx, "timings");
  96
  97   s1 = (char *) (buf1 + align1);
  98   s2 = (char *) (buf2 + align2);
  99
 100   for (i = 0; i < len; i++)
 101     {
 102       s1[i] = toupper (1 + 23 * i % max_char);
 103       s2[i] = tolower (s1[i]);
 104     }
 105
 106   s1[len] = s2[len] = 0;
 107   s1[len + 1] = 23;
 108   s2[len + 1] = 24 + exp_result;
 109   if ((s2[len - 1] == 'z' && exp_result == -1)
 110       || (s2[len - 1] == 'a' && exp_result == 1))
 111     s1[len - 1] += exp_result;
 112   else
 113     s2[len - 1] -= exp_result;
 114
 115   FOR_EACH_IMPL (impl, 0)
 116     do_one_test (json_ctx, impl, s1, s2, exp_result);
 117
 118   json_array_end (json_ctx);
 119   json_element_object_end (json_ctx);
 120 }
 121
 122 int
 123 test_main (void)
 124 {
 125   json_ctx_t json_ctx;
 126   size_t i;
 127
 128   test_init ();
 129
 130   json_init (&json_ctx, 0, stdout);
 131
 132   json_document_begin (&json_ctx);
 133   json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
 134
 135   json_attr_object_begin (&json_ctx, "functions");
 136   json_attr_object_begin (&json_ctx, TEST_NAME);
 137   json_attr_string (&json_ctx, "bench-variant", "");
 138
 139   json_array_begin (&json_ctx, "ifuncs");
 140   FOR_EACH_IMPL (impl, 0)
 141     json_element_string (&json_ctx, impl->name);
 142   json_array_end (&json_ctx);
 143
 144   json_array_begin (&json_ctx, "results");
 145
 146   for (i = 1; i < 16; ++i)
 147     {
 148       do_test (&json_ctx, i, i, i, 127, 0);
 149       do_test (&json_ctx, i, i, i, 127, 1);
 150       do_test (&json_ctx, i, i, i, 127, -1);
 151     }
 152
 153   for (i = 1; i < 10; ++i)
 154     {
 155       do_test (&json_ctx, 0, 0, 2 << i, 127, 0);
 156       do_test (&json_ctx, 0, 0, 2 << i, 254, 0);
 157       do_test (&json_ctx, 0, 0, 2 << i, 127, 1);
 158       do_test (&json_ctx, 0, 0, 2 << i, 254, 1);
 159       do_test (&json_ctx, 0, 0, 2 << i, 127, -1);
 160       do_test (&json_ctx, 0, 0, 2 << i, 254, -1);
 161     }
 162
 163   for (i = 1; i < 8; ++i)
 164     {
 165       do_test (&json_ctx, i, 2 * i, 8 << i, 127, 0);
 166       do_test (&json_ctx, 2 * i, i, 8 << i, 254, 0);
 167       do_test (&json_ctx, i, 2 * i, 8 << i, 127, 1);
 168       do_test (&json_ctx, 2 * i, i, 8 << i, 254, 1);
 169       do_test (&json_ctx, i, 2 * i, 8 << i, 127, -1);
 170       do_test (&json_ctx, 2 * i, i, 8 << i, 254, -1);
 171     }
 172
 173   json_array_end (&json_ctx);
 174   json_attr_object_end (&json_ctx);
 175   json_attr_object_end (&json_ctx);
 176   json_document_end (&json_ctx);
 177
 178   return ret;
 179 }
 180
 181 #include <support/test-driver.c>