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glibc/benchtests/bench-strlen.c
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/* Measure STRLEN functions. | |
Copyright (C) 2013-2016 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 | |
#ifndef WIDE | |
# define TEST_NAME "strlen" | |
#else | |
# define TEST_NAME "wcslen" | |
#endif | |
#include "bench-string.h" | |
#ifndef WIDE | |
# define STRLEN strlen | |
# define CHAR char | |
# define MAX_CHAR CHAR_MAX | |
#else | |
# include <wchar.h> | |
# define STRLEN wcslen | |
# define CHAR wchar_t | |
# define MAX_CHAR WCHAR_MAX | |
#endif | |
typedef size_t (*proto_t) (const CHAR *); | |
size_t | |
simple_STRLEN (const CHAR *s) | |
{ | |
const CHAR *p; | |
for (p = s; *p; ++p); | |
return p - s; | |
} | |
#ifndef WIDE | |
size_t | |
builtin_strlen (const CHAR *p) | |
{ | |
return __builtin_strlen (p); | |
} | |
IMPL (builtin_strlen, 0) | |
#endif | |
IMPL (simple_STRLEN, 0) | |
IMPL (STRLEN, 1) | |
static void | |
do_one_test (impl_t *impl, const CHAR *s, size_t exp_len) | |
{ | |
size_t len = CALL (impl, s), i, iters = INNER_LOOP_ITERS; | |
timing_t start, stop, cur; | |
if (len != exp_len) | |
{ | |
error (0, 0, "Wrong result in function %s %zd %zd", impl->name, | |
len, exp_len); | |
ret = 1; | |
return; | |
} | |
TIMING_NOW (start); | |
for (i = 0; i < iters; ++i) | |
{ | |
CALL (impl, s); | |
} | |
TIMING_NOW (stop); | |
TIMING_DIFF (cur, start, stop); | |
TIMING_PRINT_MEAN ((double) cur, (double) iters); | |
} | |
static void | |
do_test (size_t align, size_t len) | |
{ | |
size_t i; | |
align &= 63; | |
if (align + sizeof(CHAR) * len >= page_size) | |
return; | |
CHAR *buf = (CHAR *) (buf1); | |
for (i = 0; i < len; ++i) | |
buf[align + i] = 1 + 11111 * i % MAX_CHAR; | |
buf[align + len] = 0; | |
printf ("Length %4zd, alignment %2zd:", len, align); | |
FOR_EACH_IMPL (impl, 0) | |
do_one_test (impl, (CHAR *) (buf + align), len); | |
putchar ('\n'); | |
} | |
int | |
test_main (void) | |
{ | |
size_t i; | |
test_init (); | |
printf ("%20s", ""); | |
FOR_EACH_IMPL (impl, 0) | |
printf ("\t%s", impl->name); | |
putchar ('\n'); | |
/* Checking with only 4 * N alignments for wcslen, other alignments are wrong for wchar_t type arrays*/ | |
for (i = 1; i < 8; ++i) | |
{ | |
do_test (sizeof(CHAR) * i, i); | |
do_test (0, i); | |
} | |
for (i = 2; i <= 12; ++i) | |
{ | |
do_test (0, 1 << i); | |
do_test (sizeof(CHAR) * 7, 1 << i); | |
do_test (sizeof(CHAR) * i, 1 << i); | |
do_test (sizeof(CHAR) * i, (size_t)((1 << i) / 1.5)); | |
} | |
return ret; | |
} | |
#include "../test-skeleton.c" |