benchtests/bench-strspn.c

   1 /* Measure strspn functions.
   2    Copyright (C) 2013-2017 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 #ifndef WIDE
  28 # define STRSPN strspn
  29 # define CHAR char
  30 # define SIMPLE_STRSPN simple_strspn
  31 # define STUPID_STRSPN stupid_strspn
  32 # define STRLEN strlen
  33 # define STRCHR strchr
  34 # define BIG_CHAR CHAR_MAX
  35 # define SMALL_CHAR 127
  36 #else
  37 # include <wchar.h>
  38 # define STRSPN wcsspn
  39 # define CHAR wchar_t
  40 # define SIMPLE_STRSPN simple_wcsspn
  41 # define STUPID_STRSPN stupid_wcsspn
  42 # define STRLEN wcslen
  43 # define STRCHR wcschr
  44 # define BIG_CHAR WCHAR_MAX
  45 # define SMALL_CHAR 1273
  46 #endif /* WIDE */
  47
  48 typedef size_t (*proto_t) (const CHAR *, const CHAR *);
  49 size_t SIMPLE_STRSPN (const CHAR *, const CHAR *);
  50 size_t STUPID_STRSPN (const CHAR *, const CHAR *);
  51
  52 IMPL (STUPID_STRSPN, 0)
  53 IMPL (SIMPLE_STRSPN, 0)
  54 IMPL (STRSPN, 1)
  55
  56 size_t
  57 SIMPLE_STRSPN (const CHAR *s, const CHAR *acc)
  58 {
  59   const CHAR *r, *str = s;
  60   CHAR c;
  61
  62   while ((c = *s++) != '\0')
  63     {
  64       for (r = acc; *r != '\0'; ++r)
  65         if (*r == c)
  66           break;
  67       if (*r == '\0')
  68         return s - str - 1;
  69     }
  70   return s - str - 1;
  71 }
  72
  73 size_t
  74 STUPID_STRSPN (const CHAR *s, const CHAR *acc)
  75 {
  76   size_t ns = STRLEN (s), nacc = STRLEN (acc);
  77   size_t i, j;
  78
  79   for (i = 0; i < ns; ++i)
  80     {
  81       for (j = 0; j < nacc; ++j)
  82         if (s[i] == acc[j])
  83           break;
  84       if (j == nacc)
  85         return i;
  86     }
  87   return i;
  88 }
  89
  90 static void
  91 do_one_test (impl_t *impl, const CHAR *s, const CHAR *acc, size_t exp_res)
  92 {
  93   size_t res = CALL (impl, s, acc), i, iters = INNER_LOOP_ITERS;
  94   timing_t start, stop, cur;
  95
  96   if (res != exp_res)
  97     {
  98       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  99              (void *) res, (void *) exp_res);
 100       ret = 1;
 101       return;
 102     }
 103
 104   TIMING_NOW (start);
 105   for (i = 0; i < iters; ++i)
 106     {
 107       CALL (impl, s, acc);
 108     }
 109   TIMING_NOW (stop);
 110
 111   TIMING_DIFF (cur, start, stop);
 112
 113   TIMING_PRINT_MEAN ((double) cur, (double) iters);
 114 }
 115
 116 static void
 117 do_test (size_t align, size_t pos, size_t len)
 118 {
 119   size_t i;
 120   CHAR *acc, *s;
 121
 122   align &= 7;
 123   if ((align + pos + 10) * sizeof (CHAR) >= page_size || len > 240 || ! len)
 124     return;
 125
 126   acc = (CHAR *) (buf2) + (random () & 255);
 127   s = (CHAR *) (buf1) + align;
 128
 129   for (i = 0; i < len; ++i)
 130     {
 131       acc[i] = random () & BIG_CHAR;
 132       if (!acc[i])
 133         acc[i] = random () & BIG_CHAR;
 134       if (!acc[i])
 135         acc[i] = 1 + (random () & SMALL_CHAR);
 136     }
 137   acc[len] = '\0';
 138
 139   for (i = 0; i < pos; ++i)
 140     s[i] = acc[random () % len];
 141   s[pos] = random () & BIG_CHAR;
 142   if (STRCHR (acc, s[pos]))
 143     s[pos] = '\0';
 144   else
 145     {
 146       for (i = pos + 1; i < pos + 10; ++i)
 147         s[i] = random () & BIG_CHAR;
 148       s[i] = '\0';
 149     }
 150
 151   printf ("Length %4zd, alignment %2zd, acc len %2zd:", pos, align, len);
 152
 153   FOR_EACH_IMPL (impl, 0)
 154     do_one_test (impl, s, acc, pos);
 155
 156   putchar ('\n');
 157 }
 158
 159 int
 160 test_main (void)
 161 {
 162   size_t i;
 163
 164   test_init ();
 165
 166   printf ("%32s", "");
 167   FOR_EACH_IMPL (impl, 0)
 168     printf ("\t%s", impl->name);
 169   putchar ('\n');
 170
 171   for (i = 0; i < 32; ++i)
 172     {
 173       do_test (0, 512, i);
 174       do_test (i, 512, i);
 175     }
 176
 177   for (i = 1; i < 8; ++i)
 178     {
 179       do_test (0, 16 << i, 4);
 180       do_test (i, 16 << i, 4);
 181     }
 182
 183   for (i = 1; i < 8; ++i)
 184     do_test (i, 64, 10);
 185
 186   for (i = 0; i < 64; ++i)
 187     do_test (0, i, 6);
 188
 189   return ret;
 190 }
 191
 192 #include <support/test-driver.c>