benchtests/bench-strcpy.c

   1 /* Measure strcpy functions.
   2    Copyright (C) 2013 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 #ifdef WIDE
  20 # include <wchar.h>
  21 # define CHAR wchar_t
  22 # define UCHAR wchar_t
  23 # define sfmt "ls"
  24 # define BIG_CHAR WCHAR_MAX
  25 # define SMALL_CHAR 1273
  26 # define STRCMP wcscmp
  27 # define MEMCMP wmemcmp
  28 # define MEMSET wmemset
  29 #else
  30 # define CHAR char
  31 # define UCHAR unsigned char
  32 # define sfmt "s"
  33 # define BIG_CHAR CHAR_MAX
  34 # define SMALL_CHAR 127
  35 # define STRCMP strcmp
  36 # define MEMCMP memcmp
  37 # define MEMSET memset
  38 #endif
  39
  40 #ifndef STRCPY_RESULT
  41 # define STRCPY_RESULT(dst, len) dst
  42 # define TEST_MAIN
  43 # ifndef WIDE
  44 #  define TEST_NAME "strcpy"
  45 # else
  46 #  define TEST_NAME "wcscpy"
  47 # endif
  48 # include "bench-string.h"
  49 # ifndef WIDE
  50 #  define SIMPLE_STRCPY simple_strcpy
  51 #  define STRCPY strcpy
  52 # else
  53 #  define SIMPLE_STRCPY simple_wcscpy
  54 #  define STRCPY wcscpy
  55 # endif
  56
  57 CHAR *SIMPLE_STRCPY (CHAR *, const CHAR *);
  58
  59 IMPL (SIMPLE_STRCPY, 0)
  60 IMPL (STRCPY, 1)
  61
  62 CHAR *
  63 SIMPLE_STRCPY (CHAR *dst, const CHAR *src)
  64 {
  65   CHAR *ret = dst;
  66   while ((*dst++ = *src++) != '\0');
  67   return ret;
  68 }
  69 #endif
  70
  71 typedef CHAR *(*proto_t) (CHAR *, const CHAR *);
  72
  73 static void
  74 do_one_test (impl_t *impl, CHAR *dst, const CHAR *src,
  75              size_t len __attribute__((unused)))
  76 {
  77   if (CALL (impl, dst, src) != STRCPY_RESULT (dst, len))
  78     {
  79       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  80              CALL (impl, dst, src), STRCPY_RESULT (dst, len));
  81       ret = 1;
  82       return;
  83     }
  84
  85   if (STRCMP (dst, src) != 0)
  86     {
  87       error (0, 0,
  88              "Wrong result in function %s dst \"%" sfmt "\" src \"%" sfmt "\"",
  89              impl->name, dst, src);
  90       ret = 1;
  91       return;
  92     }
  93
  94   if (HP_TIMING_AVAIL)
  95     {
  96       hp_timing_t start __attribute ((unused));
  97       hp_timing_t stop __attribute ((unused));;
  98       hp_timing_t best_time = ~ (hp_timing_t) 0;
  99       size_t i;
 100
 101       for (i = 0; i < 32; ++i)
 102         {
 103           HP_TIMING_NOW (start);
 104           CALL (impl, dst, src);
 105           HP_TIMING_NOW (stop);
 106           HP_TIMING_BEST (best_time, start, stop);
 107         }
 108
 109       printf ("\t%zd", (size_t) best_time);
 110     }
 111 }
 112
 113 static void
 114 do_test (size_t align1, size_t align2, size_t len, int max_char)
 115 {
 116   size_t i;
 117   CHAR *s1, *s2;
 118 /* For wcscpy: align1 and align2 here mean alignment not in bytes,
 119    but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
 120    len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */
 121   align1 &= 7;
 122   if ((align1 + len) * sizeof(CHAR) >= page_size)
 123     return;
 124
 125   align2 &= 7;
 126   if ((align2 + len) * sizeof(CHAR) >= page_size)
 127     return;
 128
 129   s1 = (CHAR *) (buf1) + align1;
 130   s2 = (CHAR *) (buf2) + align2;
 131
 132   for (i = 0; i < len; i++)
 133     s1[i] = 32 + 23 * i % (max_char - 32);
 134   s1[len] = 0;
 135
 136   if (HP_TIMING_AVAIL)
 137     printf ("Length %4zd, alignments in bytes %2zd/%2zd:", len, align1 * sizeof(CHAR), align2 * sizeof(CHAR));
 138
 139   FOR_EACH_IMPL (impl, 0)
 140     do_one_test (impl, s2, s1, len);
 141
 142   if (HP_TIMING_AVAIL)
 143     putchar ('\n');
 144 }
 145
 146 int
 147 test_main (void)
 148 {
 149   size_t i;
 150
 151   test_init ();
 152
 153   printf ("%23s", "");
 154   FOR_EACH_IMPL (impl, 0)
 155     printf ("\t%s", impl->name);
 156   putchar ('\n');
 157
 158   for (i = 0; i < 16; ++i)
 159     {
 160       do_test (0, 0, i, SMALL_CHAR);
 161       do_test (0, 0, i, BIG_CHAR);
 162       do_test (0, i, i, SMALL_CHAR);
 163       do_test (i, 0, i, BIG_CHAR);
 164     }
 165
 166   for (i = 1; i < 8; ++i)
 167     {
 168       do_test (0, 0, 8 << i, SMALL_CHAR);
 169       do_test (8 - i, 2 * i, 8 << i, SMALL_CHAR);
 170     }
 171
 172   for (i = 1; i < 8; ++i)
 173     {
 174       do_test (i, 2 * i, 8 << i, SMALL_CHAR);
 175       do_test (2 * i, i, 8 << i, BIG_CHAR);
 176       do_test (i, i, 8 << i, SMALL_CHAR);
 177       do_test (i, i, 8 << i, BIG_CHAR);
 178     }
 179
 180   return ret;
 181 }
 182
 183 #include "../test-skeleton.c"