mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 06:20:06 +00:00
131 lines
3.1 KiB
C
131 lines
3.1 KiB
C
/* Measure memccpy functions.
|
|
Copyright (C) 2013-2023 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#define TEST_MAIN
|
|
#define TEST_NAME "memccpy"
|
|
#include "bench-string.h"
|
|
|
|
void *
|
|
generic_memccpy (void *dst, const void *src, int c, size_t n)
|
|
{
|
|
void *p = memchr (src, c, n);
|
|
|
|
if (p != NULL)
|
|
return mempcpy (dst, src, p - src + 1);
|
|
|
|
memcpy (dst, src, n);
|
|
return NULL;
|
|
}
|
|
|
|
IMPL (memccpy, 1)
|
|
IMPL (generic_memccpy, 0)
|
|
|
|
typedef void *(*proto_t) (void *, const void *, int c, size_t);
|
|
|
|
static void
|
|
do_one_test (impl_t *impl, void *dst, const void *src, int c, size_t len,
|
|
size_t n)
|
|
{
|
|
size_t i, iters = INNER_LOOP_ITERS_LARGE;
|
|
timing_t start, stop, cur;
|
|
|
|
TIMING_NOW (start);
|
|
for (i = 0; i < iters; ++i)
|
|
{
|
|
CALL (impl, dst, src, c, n);
|
|
}
|
|
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, int c, size_t len, size_t n,
|
|
int max_char)
|
|
{
|
|
size_t i;
|
|
char *s1, *s2;
|
|
|
|
align1 &= 7;
|
|
if (align1 + len >= page_size)
|
|
return;
|
|
|
|
align2 &= 7;
|
|
if (align2 + len >= page_size)
|
|
return;
|
|
|
|
s1 = (char *) (buf1 + align1);
|
|
s2 = (char *) (buf2 + align2);
|
|
|
|
for (i = 0; i < len - 1; ++i)
|
|
{
|
|
s1[i] = 32 + 23 * i % (max_char - 32);
|
|
if (s1[i] == (char) c)
|
|
--s1[i];
|
|
}
|
|
s1[len - 1] = c;
|
|
for (i = len; i + align1 < page_size && i < len + 64; ++i)
|
|
s1[i] = 32 + 32 * i % (max_char - 32);
|
|
|
|
printf ("Length %4zd, n %4zd, char %d, alignment %2zd/%2zd:", len, n, c, align1, align2);
|
|
|
|
FOR_EACH_IMPL (impl, 0)
|
|
do_one_test (impl, s2, s1, c, len, n);
|
|
|
|
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 = 1; i < 8; ++i)
|
|
{
|
|
do_test (i, i, 12, 16, 16, 127);
|
|
do_test (i, i, 23, 16, 16, 255);
|
|
do_test (i, 2 * i, 28, 16, 16, 127);
|
|
do_test (2 * i, i, 31, 16, 16, 255);
|
|
do_test (8 - i, 2 * i, 1, 1 << i, 2 << i, 127);
|
|
do_test (2 * i, 8 - i, 17, 2 << i, 1 << i, 127);
|
|
do_test (8 - i, 2 * i, 0, 1 << i, 2 << i, 255);
|
|
do_test (2 * i, 8 - i, i, 2 << i, 1 << i, 255);
|
|
}
|
|
|
|
for (i = 1; i < 8; ++i)
|
|
{
|
|
do_test (0, 0, i, 4 << i, 8 << i, 127);
|
|
do_test (0, 0, i, 16 << i, 8 << i, 127);
|
|
do_test (8 - i, 2 * i, i, 4 << i, 8 << i, 127);
|
|
do_test (8 - i, 2 * i, i, 16 << i, 8 << i, 127);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|