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/* Measure memset functions.
Copyright (C) 2013-2017 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
#ifdef TEST_BZERO
# define TEST_NAME "bzero"
#else
# ifndef WIDE
# define TEST_NAME "memset"
# else
# define TEST_NAME "wmemset"
# endif /* WIDE */
#endif /* !TEST_BZERO */
#define MIN_PAGE_SIZE 131072
#include "bench-string.h"
#ifndef WIDE
# define MEMSET memset
# define CHAR char
# define SIMPLE_MEMSET simple_memset
# define MEMCMP memcmp
#else
# include <wchar.h>
# define MEMSET wmemset
# define CHAR wchar_t
# define SIMPLE_MEMSET simple_wmemset
# define MEMCMP wmemcmp
#endif /* WIDE */
CHAR *SIMPLE_MEMSET (CHAR *, int, size_t);
#ifdef TEST_BZERO
typedef void (*proto_t) (char *, size_t);
void simple_bzero (char *, size_t);
void builtin_bzero (char *, size_t);
IMPL (simple_bzero, 0)
IMPL (builtin_bzero, 0)
IMPL (bzero, 1)
void
simple_bzero (char *s, size_t n)
{
SIMPLE_MEMSET (s, 0, n);
}
void
builtin_bzero (char *s, size_t n)
{
__builtin_bzero (s, n);
}
#else
typedef CHAR *(*proto_t) (CHAR *, int, size_t);
IMPL (SIMPLE_MEMSET, 0)
# ifndef WIDE
char *builtin_memset (char *, int, size_t);
IMPL (builtin_memset, 0)
# endif /* !WIDE */
IMPL (MEMSET, 1)
# ifndef WIDE
char *
builtin_memset (char *s, int c, size_t n)
{
return __builtin_memset (s, c, n);
}
# endif /* !WIDE */
#endif /* !TEST_BZERO */
CHAR *
inhibit_loop_to_libcall
SIMPLE_MEMSET (CHAR *s, int c, size_t n)
{
CHAR *r = s, *end = s + n;
while (r < end)
*r++ = c;
return s;
}
static void
do_one_test (impl_t *impl, CHAR *s, int c __attribute ((unused)), size_t n)
{
size_t i, iters = INNER_LOOP_ITERS;
timing_t start, stop, cur;
TIMING_NOW (start);
for (i = 0; i < iters; ++i)
{
#ifdef TEST_BZERO
CALL (impl, s, n);
#else
CALL (impl, s, c, n);
#endif /* !TEST_BZERO */
}
TIMING_NOW (stop);
TIMING_DIFF (cur, start, stop);
TIMING_PRINT_MEAN ((double) cur, (double) iters);
}
static void
do_test (size_t align, int c, size_t len)
{
align &= 63;
if ((align + len) * sizeof (CHAR) > page_size)
return;
printf ("Length %4zd, alignment %2zd, c %2d:", len, align, c);
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, (CHAR *) (buf1) + align, c, len);
putchar ('\n');
}
int
test_main (void)
{
size_t i;
int c = 0;
test_init ();
printf ("%24s", "");
FOR_EACH_IMPL (impl, 0)
printf ("\t%s", impl->name);
putchar ('\n');
#ifndef TEST_BZERO
for (c = -65; c <= 130; c += 65)
#endif
{
for (i = 0; i < 18; ++i)
do_test (0, c, 1 << i);
for (i = 1; i < 32; ++i)
{
do_test (i, c, i);
if (i & (i - 1))
do_test (0, c, i);
}
for (i = 32; i < 512; i+=32)
{
do_test (0, c, i);
do_test (i, c, i);
}
do_test (1, c, 14);
do_test (3, c, 1024);
do_test (4, c, 64);
do_test (2, c, 25);
}
for (i = 33; i <= 256; i += 4)
{
do_test (0, c, 32 * i);
do_test (i, c, 32 * i);
}
return ret;
}
#include <support/test-driver.c>
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