benchtests/bench-strspn.c

   1 /* Measure strspn functions.
   2    Copyright (C) 2013-2018 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #define TEST_MAIN
  20 #ifndef WIDE
  21 # define TEST_NAME "strspn"
  22 #else
  23 # define TEST_NAME "wcsspn"
  24 #endif /* WIDE */
  25 #include "bench-string.h"
  26
  27 #define BIG_CHAR MAX_CHAR
  28
  29 #ifndef WIDE
  30 # define SIMPLE_STRSPN simple_strspn
  31 # define STUPID_STRSPN stupid_strspn
  32 # define SMALL_CHAR 127
  33 #else
  34 # define SIMPLE_STRSPN simple_wcsspn
  35 # define STUPID_STRSPN stupid_wcsspn
  36 # define SMALL_CHAR 1273
  37 #endif /* WIDE */
  38
  39 typedef size_t (*proto_t) (const CHAR *, const CHAR *);
  40 size_t SIMPLE_STRSPN (const CHAR *, const CHAR *);
  41 size_t STUPID_STRSPN (const CHAR *, const CHAR *);
  42
  43 IMPL (STUPID_STRSPN, 0)
  44 IMPL (SIMPLE_STRSPN, 0)
  45 IMPL (STRSPN, 1)
  46
  47 size_t
  48 SIMPLE_STRSPN (const CHAR *s, const CHAR *acc)
  49 {
  50   const CHAR *r, *str = s;
  51   CHAR c;
  52
  53   while ((c = *s++) != '\0')
  54     {
  55       for (r = acc; *r != '\0'; ++r)
  56         if (*r == c)
  57           break;
  58       if (*r == '\0')
  59         return s - str - 1;
  60     }
  61   return s - str - 1;
  62 }
  63
  64 size_t
  65 STUPID_STRSPN (const CHAR *s, const CHAR *acc)
  66 {
  67   size_t ns = STRLEN (s), nacc = STRLEN (acc);
  68   size_t i, j;
  69
  70   for (i = 0; i < ns; ++i)
  71     {
  72       for (j = 0; j < nacc; ++j)
  73         if (s[i] == acc[j])
  74           break;
  75       if (j == nacc)
  76         return i;
  77     }
  78   return i;
  79 }
  80
  81 static void
  82 do_one_test (impl_t *impl, const CHAR *s, const CHAR *acc, size_t exp_res)
  83 {
  84   size_t res = CALL (impl, s, acc), i, iters = INNER_LOOP_ITERS;
  85   timing_t start, stop, cur;
  86
  87   if (res != exp_res)
  88     {
  89       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  90              (void *) res, (void *) exp_res);
  91       ret = 1;
  92       return;
  93     }
  94
  95   TIMING_NOW (start);
  96   for (i = 0; i < iters; ++i)
  97     {
  98       CALL (impl, s, acc);
  99     }
 100   TIMING_NOW (stop);
 101
 102   TIMING_DIFF (cur, start, stop);
 103
 104   TIMING_PRINT_MEAN ((double) cur, (double) iters);
 105 }
 106
 107 static void
 108 do_test (size_t align, size_t pos, size_t len)
 109 {
 110   size_t i;
 111   CHAR *acc, *s;
 112
 113   align &= 7;
 114   if ((align + pos + 10) * sizeof (CHAR) >= page_size || len > 240 || ! len)
 115     return;
 116
 117   acc = (CHAR *) (buf2) + (random () & 255);
 118   s = (CHAR *) (buf1) + align;
 119
 120   for (i = 0; i < len; ++i)
 121     {
 122       acc[i] = random () & BIG_CHAR;
 123       if (!acc[i])
 124         acc[i] = random () & BIG_CHAR;
 125       if (!acc[i])
 126         acc[i] = 1 + (random () & SMALL_CHAR);
 127     }
 128   acc[len] = '\0';
 129
 130   for (i = 0; i < pos; ++i)
 131     s[i] = acc[random () % len];
 132   s[pos] = random () & BIG_CHAR;
 133   if (STRCHR (acc, s[pos]))
 134     s[pos] = '\0';
 135   else
 136     {
 137       for (i = pos + 1; i < pos + 10; ++i)
 138         s[i] = random () & BIG_CHAR;
 139       s[i] = '\0';
 140     }
 141
 142   printf ("Length %4zd, alignment %2zd, acc len %2zd:", pos, align, len);
 143
 144   FOR_EACH_IMPL (impl, 0)
 145     do_one_test (impl, s, acc, pos);
 146
 147   putchar ('\n');
 148 }
 149
 150 int
 151 test_main (void)
 152 {
 153   size_t i;
 154
 155   test_init ();
 156
 157   printf ("%32s", "");
 158   FOR_EACH_IMPL (impl, 0)
 159     printf ("\t%s", impl->name);
 160   putchar ('\n');
 161
 162   for (i = 0; i < 32; ++i)
 163     {
 164       do_test (0, 512, i);
 165       do_test (i, 512, i);
 166     }
 167
 168   for (i = 1; i < 8; ++i)
 169     {
 170       do_test (0, 16 << i, 4);
 171       do_test (i, 16 << i, 4);
 172     }
 173
 174   for (i = 1; i < 8; ++i)
 175     do_test (i, 64, 10);
 176
 177   for (i = 0; i < 64; ++i)
 178     do_test (0, i, 6);
 179
 180   return ret;
 181 }
 182
 183 #include <support/test-driver.c>