132 lines
2.9 KiB
C
132 lines
2.9 KiB
C
/* Measure memchr functions.
|
|
Copyright (C) 2013 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 "memchr"
|
|
#include "bench-string.h"
|
|
|
|
typedef char *(*proto_t) (const char *, int, size_t);
|
|
char *simple_memchr (const char *, int, size_t);
|
|
|
|
IMPL (simple_memchr, 0)
|
|
IMPL (memchr, 1)
|
|
|
|
char *
|
|
simple_memchr (const char *s, int c, size_t n)
|
|
{
|
|
while (n--)
|
|
if (*s++ == (char) c)
|
|
return (char *) s - 1;
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
do_one_test (impl_t *impl, const char *s, int c, size_t n, char *exp_res)
|
|
{
|
|
char *res = CALL (impl, s, c, n);
|
|
size_t i, iters = INNER_LOOP_ITERS;
|
|
timing_t start, stop, cur;
|
|
|
|
if (res != exp_res)
|
|
{
|
|
error (0, 0, "Wrong result in function %s %p %p", impl->name,
|
|
res, exp_res);
|
|
ret = 1;
|
|
return;
|
|
}
|
|
|
|
TIMING_NOW (start);
|
|
for (i = 0; i < iters; ++i)
|
|
{
|
|
CALL (impl, s, c, n);
|
|
}
|
|
TIMING_NOW (stop);
|
|
|
|
TIMING_DIFF (cur, start, stop);
|
|
|
|
TIMING_PRINT_MEAN ((double) cur, (double) iters);
|
|
}
|
|
|
|
static void
|
|
do_test (size_t align, size_t pos, size_t len, int seek_char)
|
|
{
|
|
size_t i;
|
|
char *result;
|
|
|
|
align &= 7;
|
|
if (align + len >= page_size)
|
|
return;
|
|
|
|
for (i = 0; i < len; ++i)
|
|
{
|
|
buf1[align + i] = 1 + 23 * i % 127;
|
|
if (buf1[align + i] == seek_char)
|
|
buf1[align + i] = seek_char + 1;
|
|
}
|
|
buf1[align + len] = 0;
|
|
|
|
if (pos < len)
|
|
{
|
|
buf1[align + pos] = seek_char;
|
|
buf1[align + len] = -seek_char;
|
|
result = (char *) (buf1 + align + pos);
|
|
}
|
|
else
|
|
{
|
|
result = NULL;
|
|
buf1[align + len] = seek_char;
|
|
}
|
|
|
|
printf ("Length %4zd, alignment %2zd:", pos, align);
|
|
|
|
FOR_EACH_IMPL (impl, 0)
|
|
do_one_test (impl, (char *) (buf1 + align), seek_char, len, result);
|
|
|
|
putchar ('\n');
|
|
}
|
|
|
|
int
|
|
test_main (void)
|
|
{
|
|
size_t i;
|
|
|
|
test_init ();
|
|
|
|
printf ("%20s", "");
|
|
FOR_EACH_IMPL (impl, 0)
|
|
printf ("\t%s", impl->name);
|
|
putchar ('\n');
|
|
|
|
for (i = 1; i < 8; ++i)
|
|
{
|
|
do_test (0, 16 << i, 2048, 23);
|
|
do_test (i, 64, 256, 23);
|
|
do_test (0, 16 << i, 2048, 0);
|
|
do_test (i, 64, 256, 0);
|
|
}
|
|
for (i = 1; i < 32; ++i)
|
|
{
|
|
do_test (0, i, i + 1, 23);
|
|
do_test (0, i, i + 1, 0);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#include "../test-skeleton.c"
|