glibc/benchtests/bench-strcasecmp.c
Wilco Dijkstra 16f87cfd63 String benchtest cleanup
Continue cleanup of the string benchtests.  Remove simplistic
byte-oriented versions with faster generic implementations.
Remove bcopy/bzero benchmarks (bcopy/bzero are obsolete and never
emitted by compilers).  Remove builtin versions of memcpy, memset
and strlen.  Remove all remaining "stupid" implementations given
they are always slower than the "simple" variants and thus don't
add anything useful.

	* benchtests/bench-strcasecmp.c (stupid_strcasecmp): Remove.
	* benchtests/bench-strcasestr.c (stupid_strcasestr): Remove.
	* benchtests/bench-strchr.c (stupid_strchr): Remove.
	* benchtests/bench-strcmp.c (stupid_strcmp): Remove.
	* benchtests/bench-strcspn.c (stupid_strcspn): Remove.
	* benchtests/bench-strlen.c (builtin_strlen): Remove.
	* benchtests/bench-strncasecmp.c (stupid_strncasecmp): Remove.
	* benchtests/bench-strncmp.c (stupid_strncmp): Remove.
	* benchtests/bench-strpbrk.c (stupid_strpbrk): Remove.
	* benchtests/bench-strspn.c (stupid_strspn): Remove.
	* benchtests/Makefile: Remove bench-bcopy.c and bench-bzero.c.
	* benchtests/bench-bcopy.c: Delete file.
	* benchtests/bench-bzero.c: Likewise.
	* benchtests/bench-memccpy.c (stupid_memccpy): Remove.
	(simple_memccpy): Remove.
	(generic_memccpy): Add function.
	* benchtests/bench-memcpy.c: (builtin_memcpy): Remove.
	* benchtests/bench-memmove.c (simple_bcopy): Remove.
	* benchtests/bench-mempcpy.c (simple_mempcpy): Remove.
	(generic_mempcpy): Add new function.
	* benchtests/bench-memset.c (simple_bzero): Remove.
	(builtin_bzero): Remove.
	(builtin_memset): Remove.
	* benchtests/bench-rawmemchr.c (simple_rawmemchr): Remove.
	(generic_rawmemchr): Add new function.
2019-02-12 17:19:51 +00:00

157 lines
3.6 KiB
C

/* Measure strcasecmp functions.
Copyright (C) 2013-2019 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/>. */
#include <ctype.h>
#define TEST_MAIN
#define TEST_NAME "strcasecmp"
#include "bench-string.h"
typedef int (*proto_t) (const char *, const char *);
static int simple_strcasecmp (const char *, const char *);
IMPL (simple_strcasecmp, 0)
IMPL (strcasecmp, 1)
static int
simple_strcasecmp (const char *s1, const char *s2)
{
int ret;
while ((ret = ((unsigned char) tolower (*s1)
- (unsigned char) tolower (*s2))) == 0
&& *s1++)
++s2;
return ret;
}
static void
do_one_test (impl_t *impl, const char *s1, const char *s2, int exp_result)
{
size_t i, iters = INNER_LOOP_ITERS;
timing_t start, stop, cur;
int result = CALL (impl, s1, s2);
if ((exp_result == 0 && result != 0)
|| (exp_result < 0 && result >= 0)
|| (exp_result > 0 && result <= 0))
{
error (0, 0, "Wrong result in function %s %d %d", impl->name,
result, exp_result);
ret = 1;
return;
}
TIMING_NOW (start);
for (i = 0; i < iters; ++i)
{
CALL (impl, s1, s2);
}
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, size_t len, int max_char,
int exp_result)
{
size_t i;
char *s1, *s2;
if (len == 0)
return;
align1 &= 7;
if (align1 + len + 1 >= page_size)
return;
align2 &= 7;
if (align2 + len + 1 >= page_size)
return;
s1 = (char *) (buf1 + align1);
s2 = (char *) (buf2 + align2);
for (i = 0; i < len; i++)
{
s1[i] = toupper (1 + 23 * i % max_char);
s2[i] = tolower (s1[i]);
}
s1[len] = s2[len] = 0;
s1[len + 1] = 23;
s2[len + 1] = 24 + exp_result;
if ((s2[len - 1] == 'z' && exp_result == -1)
|| (s2[len - 1] == 'a' && exp_result == 1))
s1[len - 1] += exp_result;
else
s2[len - 1] -= exp_result;
printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, s1, s2, exp_result);
putchar ('\n');
}
int
test_main (void)
{
size_t i;
test_init ();
printf ("%23s", "");
FOR_EACH_IMPL (impl, 0)
printf ("\t%s", impl->name);
putchar ('\n');
for (i = 1; i < 16; ++i)
{
do_test (i, i, i, 127, 0);
do_test (i, i, i, 127, 1);
do_test (i, i, i, 127, -1);
}
for (i = 1; i < 10; ++i)
{
do_test (0, 0, 2 << i, 127, 0);
do_test (0, 0, 2 << i, 254, 0);
do_test (0, 0, 2 << i, 127, 1);
do_test (0, 0, 2 << i, 254, 1);
do_test (0, 0, 2 << i, 127, -1);
do_test (0, 0, 2 << i, 254, -1);
}
for (i = 1; i < 8; ++i)
{
do_test (i, 2 * i, 8 << i, 127, 0);
do_test (2 * i, i, 8 << i, 254, 0);
do_test (i, 2 * i, 8 << i, 127, 1);
do_test (2 * i, i, 8 << i, 254, 1);
do_test (i, 2 * i, 8 << i, 127, -1);
do_test (2 * i, i, 8 << i, 254, -1);
}
return ret;
}
#include <support/test-driver.c>