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/* Measure memset 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
#ifdef TEST_BZERO
# define TEST_NAME "bzero"
#else
# define TEST_NAME "memset"
#endif
#define MIN_PAGE_SIZE 131072
#include "bench-string.h"
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);
char *builtin_memset (char *, int, size_t);
IMPL (simple_memset, 0)
IMPL (builtin_memset, 0)
IMPL (memset, 1)
char *
builtin_memset (char *s, int c, size_t n)
{
return __builtin_memset (s, c, n);
}
#endif
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)
{
char tstbuf[n];
#ifdef TEST_BZERO
simple_bzero (tstbuf, n);
CALL (impl, s, n);
if (memcmp (s, tstbuf, n) != 0)
#else
char *res = CALL (impl, s, c, n);
if (res != s
|| simple_memset (tstbuf, c, n) != tstbuf
|| memcmp (s, tstbuf, n) != 0)
#endif
{
error (0, 0, "Wrong result in function %s", impl->name);
ret = 1;
return;
}
if (HP_TIMING_AVAIL)
{
hp_timing_t start __attribute ((unused));
hp_timing_t stop __attribute ((unused));
hp_timing_t best_time = ~ (hp_timing_t) 0;
size_t i;
for (i = 0; i < 32; ++i)
{
HP_TIMING_NOW (start);
#ifdef TEST_BZERO
CALL (impl, s, n);
#else
CALL (impl, s, c, n);
#endif
HP_TIMING_NOW (stop);
HP_TIMING_BEST (best_time, start, stop);
}
printf ("\t%zd", (size_t) best_time);
}
}
static void
do_test (size_t align, int c, size_t len)
{
align &= 7;
if (align + len > page_size)
return;
if (HP_TIMING_AVAIL)
printf ("Length %4zd, alignment %2zd, c %2d:", len, align, c);
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, (char *) buf1 + align, c, len);
if (HP_TIMING_AVAIL)
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);
}
do_test (1, c, 14);
do_test (3, c, 1024);
do_test (4, c, 64);
do_test (2, c, 25);
}
return ret;
}
#include "../test-skeleton.c"
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