glibc/benchtests/bench-strcat.c

149 lines
3.3 KiB
C

/* Measure strcat functions.
Copyright (C) 2013-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#define TEST_MAIN
#define TEST_NAME "strcat"
#include "bench-string.h"
typedef char *(*proto_t) (char *, const char *);
char *simple_strcat (char *, const char *);
IMPL (simple_strcat, 0)
IMPL (strcat, 1)
char *
simple_strcat (char *dst, const char *src)
{
char *ret = dst;
while (*dst++ != '\0');
--dst;
while ((*dst++ = *src++) != '\0');
return ret;
}
static void
do_one_test (impl_t *impl, char *dst, const char *src)
{
size_t k = strlen (dst), i, iters = INNER_LOOP_ITERS;
timing_t start, stop, cur;
if (CALL (impl, dst, src) != dst)
{
error (0, 0, "Wrong result in function %s %p %p", impl->name,
CALL (impl, dst, src), dst);
ret = 1;
return;
}
if (strcmp (dst + k, src) != 0)
{
error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
impl->name, dst, src);
ret = 1;
return;
}
TIMING_NOW (start);
for (i = 0; i < iters; ++i)
{
dst[k] = '\0';
CALL (impl, dst, src);
}
TIMING_NOW (stop);
TIMING_DIFF (cur, start, stop);
TIMING_PRINT_MEAN ((double) cur, (double) iters);
}
static void
do_test (size_t align1, size_t align2, size_t len1, size_t len2, int max_char)
{
size_t i;
char *s1, *s2;
align1 &= 7;
if (align1 + len1 >= page_size)
return;
align2 &= 7;
if (align2 + len1 + len2 >= page_size)
return;
s1 = (char *) (buf1 + align1);
s2 = (char *) (buf2 + align2);
for (i = 0; i < len1; ++i)
s1[i] = 32 + 23 * i % (max_char - 32);
s1[len1] = '\0';
for (i = 0; i < len2; i++)
s2[i] = 32 + 23 * i % (max_char - 32);
printf ("Length %4zd/%4zd, alignment %2zd/%2zd:", len1, len2, align1, align2);
FOR_EACH_IMPL (impl, 0)
{
s2[len2] = '\0';
do_one_test (impl, s2, s1);
}
putchar ('\n');
}
int
test_main (void)
{
size_t i;
test_init ();
printf ("%28s", "");
FOR_EACH_IMPL (impl, 0)
printf ("\t%s", impl->name);
putchar ('\n');
for (i = 0; i < 16; ++i)
{
do_test (0, 0, i, i, 127);
do_test (0, 0, i, i, 255);
do_test (0, i, i, i, 127);
do_test (i, 0, i, i, 255);
}
for (i = 1; i < 8; ++i)
{
do_test (0, 0, 8 << i, 8 << i, 127);
do_test (8 - i, 2 * i, 8 << i, 8 << i, 127);
do_test (0, 0, 8 << i, 2 << i, 127);
do_test (8 - i, 2 * i, 8 << i, 2 << i, 127);
}
for (i = 1; i < 8; ++i)
{
do_test (i, 2 * i, 8 << i, 1, 127);
do_test (2 * i, i, 8 << i, 1, 255);
do_test (i, i, 8 << i, 10, 127);
do_test (i, i, 8 << i, 10, 255);
}
return ret;
}
#include "../test-skeleton.c"