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/* Test and measure memset functions.
Copyright (C) 1999, 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Written by Jakub Jelinek <jakub@redhat.com>, 1999.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#define TEST_MAIN
#define MIN_PAGE_SIZE 131072
#include "test-string.h"
typedef char *(*proto_t) (char *, int, size_t);
char *simple_memset (char *, int, size_t);
char *builtin_memset (char *, int, size_t);
IMPL (simple_memset, 0)
IMPL (builtin_memset, 0)
IMPL (memset, 1)
char *
simple_memset (char *s, int c, size_t n)
{
char *r = s, *end = s + n;
while (r < end)
*r++ = c;
return s;
}
char *
builtin_memset (char *s, int c, size_t n)
{
return __builtin_memset (s, c, n);
}
static void
do_one_test (impl_t *impl, char *s, int c, size_t n)
{
char *res = CALL (impl, s, c, n);
if (res != s)
{
error (0, 0, "Wrong result in function %s %p != %p", impl->name,
res, s);
ret = 1;
return;
}
if (HP_TIMING_AVAIL)
{
hp_timing_t start, stop, best_time = ~ (hp_timing_t) 0;
size_t i;
for (i = 0; i < 32; ++i)
{
HP_TIMING_NOW (start);
CALL (impl, s, c, n);
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, buf1 + align, c, len);
if (HP_TIMING_AVAIL)
putchar ('\n');
}
static void
do_random_tests (void)
{
size_t i, j, k, n, align, len, size;
int c, o;
unsigned char *p, *res;
for (i = 0; i < 65536; ++i)
buf2[i] = random () & 255;
for (n = 0; n < ITERATIONS; n++)
{
if ((random () & 31) == 0)
size = 65536;
else
size = 512;
p = buf1 + page_size - size;
len = random () & (size - 1);
align = size - len - (random () & 31);
if (align > size)
align = size - len;
if ((random () & 7) == 0)
align &= ~63;
if ((random () & 7) == 0)
c = 0;
else
c = random () & 255;
o = random () & 255;
if (o == c)
o = (c + 1) & 255;
j = len + align + 128;
if (j > size)
j = size;
if (align >= 128)
k = align - 128;
else
k = 0;
for (i = k; i < align; ++i)
p[i] = o;
for (i = align + len; i < j; ++i)
p[i] = o;
FOR_EACH_IMPL (impl, 1)
{
for (i = 0; i < len; ++i)
{
p[i + align] = buf2[i];
if (p[i + align] == c)
p[i + align] = o;
}
res = CALL (impl, p + align, c, len);
if (res != p + align)
{
error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd) %p != %p",
n, impl->name, align, c, len, res, p + align);
ret = 1;
}
for (i = k; i < align; ++i)
if (p[i] != o)
{
error (0, 0, "Iteration %zd - garbage before %s (%zd, %d, %zd)",
n, impl->name, align, c, len);
ret = 1;
break;
}
for (; i < align + len; ++i)
if (p[i] != c)
{
error (0, 0, "Iteration %zd - not cleared correctly %s (%zd, %d, %zd)",
n, impl->name, align, c, len);
ret = 1;
break;
}
for (; i < j; ++i)
if (p[i] != o)
{
error (0, 0, "Iteration %zd - garbage after %s (%zd, %d, %zd)",
n, impl->name, align, c, len);
ret = 1;
break;
}
}
}
}
int
test_main (void)
{
size_t i;
int c;
test_init ();
printf ("%24s", "");
FOR_EACH_IMPL (impl, 0)
printf ("\t%s", impl->name);
putchar ('\n');
for (c = 0; c <= 65; c += 65)
{
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);
}
do_random_tests ();
return ret;
}
#include "../test-skeleton.c"
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