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glibc/benchtests/bench-memmove.c
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/* Measure memmove 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 | |
#ifdef TEST_BCOPY | |
# define TEST_NAME "bcopy" | |
#else | |
# define TEST_NAME "memmove" | |
#endif | |
#include "bench-string.h" | |
char *simple_memmove (char *, const char *, size_t); | |
#ifdef TEST_BCOPY | |
typedef void (*proto_t) (const char *, char *, size_t); | |
void simple_bcopy (const char *, char *, size_t); | |
IMPL (simple_bcopy, 0) | |
IMPL (bcopy, 1) | |
void | |
simple_bcopy (const char *src, char *dst, size_t n) | |
{ | |
simple_memmove (dst, src, n); | |
} | |
#else | |
typedef char *(*proto_t) (char *, const char *, size_t); | |
IMPL (simple_memmove, 0) | |
IMPL (memmove, 1) | |
#endif | |
char * | |
inhibit_loop_to_libcall | |
simple_memmove (char *dst, const char *src, size_t n) | |
{ | |
char *ret = dst; | |
if (src < dst) | |
{ | |
dst += n; | |
src += n; | |
while (n--) | |
*--dst = *--src; | |
} | |
else | |
while (n--) | |
*dst++ = *src++; | |
return ret; | |
} | |
static void | |
do_one_test (impl_t *impl, char *dst, char *src, const char *orig_src, | |
size_t len) | |
{ | |
size_t i, iters = INNER_LOOP_ITERS; | |
timing_t start, stop, cur; | |
memcpy (src, orig_src, len); | |
#ifdef TEST_BCOPY | |
CALL (impl, src, dst, len); | |
#else | |
char *res; | |
res = CALL (impl, dst, src, len); | |
if (res != dst) | |
{ | |
error (0, 0, "Wrong result in function %s %p %p", impl->name, | |
res, dst); | |
ret = 1; | |
return; | |
} | |
#endif | |
if (memcmp (dst, orig_src, len) != 0) | |
{ | |
error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"", | |
impl->name, dst, src); | |
ret = 1; | |
return; | |
} | |
TIMING_NOW (start); | |
for (i = 0; i < iters; ++i) | |
{ | |
#ifdef TEST_BCOPY | |
CALL (impl, src, dst, len); | |
#else | |
CALL (impl, dst, src, len); | |
#endif | |
} | |
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) | |
{ | |
size_t i, j; | |
char *s1, *s2; | |
align1 &= 63; | |
if (align1 + len >= page_size) | |
return; | |
align2 &= 63; | |
if (align2 + len >= page_size) | |
return; | |
s1 = (char *) (buf1 + align1); | |
s2 = (char *) (buf2 + align2); | |
for (i = 0, j = 1; i < len; i++, j += 23) | |
s1[i] = j; | |
printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2); | |
FOR_EACH_IMPL (impl, 0) | |
do_one_test (impl, s2, (char *) (buf2 + align1), s1, len); | |
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 = 0; i < 14; ++i) | |
{ | |
do_test (0, 32, 1 << i); | |
do_test (32, 0, 1 << i); | |
do_test (0, i, 1 << i); | |
do_test (i, 0, 1 << i); | |
} | |
for (i = 0; i < 32; ++i) | |
{ | |
do_test (0, 32, i); | |
do_test (32, 0, i); | |
do_test (0, i, i); | |
do_test (i, 0, i); | |
} | |
for (i = 3; i < 32; ++i) | |
{ | |
if ((i & (i - 1)) == 0) | |
continue; | |
do_test (0, 32, 16 * i); | |
do_test (32, 0, 16 * i); | |
do_test (0, i, 16 * i); | |
do_test (i, 0, 16 * i); | |
} | |
for (i = 32; i < 64; ++i) | |
{ | |
do_test (0, 0, 32 * i); | |
do_test (i, 0, 32 * i); | |
do_test (0, i, 32 * i); | |
do_test (i, i, 32 * i); | |
} | |
return ret; | |
} | |
#include "../test-skeleton.c" |