benchtests/bench-strcat.c

   1 /* Measure strcat 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 "strcat"
  22 #else
  23 # define TEST_NAME "wcscat"
  24 #endif /* WIDE */
  25 #include "bench-string.h"
  26
  27 #ifndef WIDE
  28 # define STRCAT strcat
  29 # define CHAR char
  30 # define sfmt "s"
  31 # define SIMPLE_STRCAT simple_strcat
  32 # define STRLEN strlen
  33 # define STRCMP strcmp
  34 # define BIG_CHAR CHAR_MAX
  35 # define SMALL_CHAR 127
  36 #else
  37 # include <wchar.h>
  38 # define STRCAT wcscat
  39 # define CHAR wchar_t
  40 # define sfmt "ls"
  41 # define SIMPLE_STRCAT simple_wcscat
  42 # define STRLEN wcslen
  43 # define STRCMP wcscmp
  44 # define BIG_CHAR WCHAR_MAX
  45 # define SMALL_CHAR 1273
  46 #endif /* WIDE */
  47
  48
  49 typedef CHAR *(*proto_t) (CHAR *, const CHAR *);
  50 CHAR *SIMPLE_STRCAT (CHAR *, const CHAR *);
  51
  52 IMPL (SIMPLE_STRCAT, 0)
  53 IMPL (STRCAT, 1)
  54
  55 CHAR *
  56 SIMPLE_STRCAT (CHAR *dst, const CHAR *src)
  57 {
  58   CHAR *ret = dst;
  59   while (*dst++ != '\0');
  60   --dst;
  61   while ((*dst++ = *src++) != '\0');
  62   return ret;
  63 }
  64
  65 static void
  66 do_one_test (impl_t *impl, CHAR *dst, const CHAR *src)
  67 {
  68   size_t k = STRLEN (dst), i, iters = INNER_LOOP_ITERS;
  69   timing_t start, stop, cur;
  70
  71   if (CALL (impl, dst, src) != dst)
  72     {
  73       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  74              CALL (impl, dst, src), dst);
  75       ret = 1;
  76       return;
  77     }
  78
  79   if (STRCMP (dst + k, src) != 0)
  80     {
  81       error (0, 0, "Wrong result in function %s dst \"%" sfmt "\" src \"%" sfmt "\"",
  82              impl->name, dst, src);
  83       ret = 1;
  84       return;
  85     }
  86
  87   TIMING_NOW (start);
  88   for (i = 0; i < iters; ++i)
  89     {
  90       dst[k] = '\0';
  91       CALL (impl, dst, src);
  92     }
  93   TIMING_NOW (stop);
  94
  95   TIMING_DIFF (cur, start, stop);
  96
  97   TIMING_PRINT_MEAN ((double) cur, (double) iters);
  98 }
  99
 100 static void
 101 do_test (size_t align1, size_t align2, size_t len1, size_t len2, int max_char)
 102 {
 103   size_t i;
 104   CHAR *s1, *s2;
 105
 106   align1 &= 7;
 107   if ((align1 + len1) * sizeof (CHAR) >= page_size)
 108     return;
 109
 110   align2 &= 7;
 111   if ((align2 + len1 + len2) * sizeof (CHAR) >= page_size)
 112     return;
 113
 114   s1 = (CHAR *) (buf1) + align1;
 115   s2 = (CHAR *) (buf2) + align2;
 116
 117   for (i = 0; i < len1; ++i)
 118     s1[i] = 32 + 23 * i % (max_char - 32);
 119   s1[len1] = '\0';
 120
 121   for (i = 0; i < len2; i++)
 122     s2[i] = 32 + 23 * i % (max_char - 32);
 123
 124   printf ("Length %4zd/%4zd, alignment %2zd/%2zd:", len1, len2, align1, align2);
 125
 126   FOR_EACH_IMPL (impl, 0)
 127     {
 128       s2[len2] = '\0';
 129       do_one_test (impl, s2, s1);
 130     }
 131
 132   putchar ('\n');
 133 }
 134
 135 int
 136 test_main (void)
 137 {
 138   size_t i;
 139
 140   test_init ();
 141
 142   printf ("%28s", "");
 143   FOR_EACH_IMPL (impl, 0)
 144     printf ("\t%s", impl->name);
 145   putchar ('\n');
 146
 147   for (i = 0; i < 16; ++i)
 148     {
 149       do_test (0, 0, i, i, SMALL_CHAR);
 150       do_test (0, 0, i, i, BIG_CHAR);
 151       do_test (0, i, i, i, SMALL_CHAR);
 152       do_test (i, 0, i, i, BIG_CHAR);
 153     }
 154
 155   for (i = 1; i < 8; ++i)
 156     {
 157       do_test (0, 0, 8 << i, 8 << i, SMALL_CHAR);
 158       do_test (8 - i, 2 * i, 8 << i, 8 << i, SMALL_CHAR);
 159       do_test (0, 0, 8 << i, 2 << i, SMALL_CHAR);
 160       do_test (8 - i, 2 * i, 8 << i, 2 << i, SMALL_CHAR);
 161     }
 162
 163   for (i = 1; i < 8; ++i)
 164     {
 165       do_test (i, 2 * i, 8 << i, 1, SMALL_CHAR);
 166       do_test (2 * i, i, 8 << i, 1, BIG_CHAR);
 167       do_test (i, i, 8 << i, 10, SMALL_CHAR);
 168       do_test (i, i, 8 << i, 10, BIG_CHAR);
 169     }
 170
 171   return ret;
 172 }
 173
 174 #include <support/test-driver.c>