1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/* Measure memccpy functions.
Copyright (C) 2013-2021 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
<https://www.gnu.org/licenses/>. */
#define TEST_MAIN
#define TEST_NAME "memccpy"
#include "bench-string.h"
void *
generic_memccpy (void *dst, const void *src, int c, size_t n)
{
void *p = memchr (src, c, n);
if (p != NULL)
return mempcpy (dst, src, p - src + 1);
memcpy (dst, src, n);
return NULL;
}
IMPL (memccpy, 1)
IMPL (generic_memccpy, 0)
typedef void *(*proto_t) (void *, const void *, int c, size_t);
static void
do_one_test (impl_t *impl, void *dst, const void *src, int c, size_t len,
size_t n)
{
size_t i, iters = INNER_LOOP_ITERS_LARGE;
timing_t start, stop, cur;
TIMING_NOW (start);
for (i = 0; i < iters; ++i)
{
CALL (impl, dst, src, c, n);
}
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, int c, size_t len, size_t n,
int max_char)
{
size_t i;
char *s1, *s2;
align1 &= 7;
if (align1 + len >= page_size)
return;
align2 &= 7;
if (align2 + len >= page_size)
return;
s1 = (char *) (buf1 + align1);
s2 = (char *) (buf2 + align2);
for (i = 0; i < len - 1; ++i)
{
s1[i] = 32 + 23 * i % (max_char - 32);
if (s1[i] == (char) c)
--s1[i];
}
s1[len - 1] = c;
for (i = len; i + align1 < page_size && i < len + 64; ++i)
s1[i] = 32 + 32 * i % (max_char - 32);
printf ("Length %4zd, n %4zd, char %d, alignment %2zd/%2zd:", len, n, c, align1, align2);
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, s2, s1, c, len, n);
putchar ('\n');
}
int
test_main (void)
{
size_t i;
test_init ();
printf ("%28s", "");
FOR_EACH_IMPL (impl, 0)
printf ("\t%s", impl->name);
putchar ('\n');
for (i = 1; i < 8; ++i)
{
do_test (i, i, 12, 16, 16, 127);
do_test (i, i, 23, 16, 16, 255);
do_test (i, 2 * i, 28, 16, 16, 127);
do_test (2 * i, i, 31, 16, 16, 255);
do_test (8 - i, 2 * i, 1, 1 << i, 2 << i, 127);
do_test (2 * i, 8 - i, 17, 2 << i, 1 << i, 127);
do_test (8 - i, 2 * i, 0, 1 << i, 2 << i, 255);
do_test (2 * i, 8 - i, i, 2 << i, 1 << i, 255);
}
for (i = 1; i < 8; ++i)
{
do_test (0, 0, i, 4 << i, 8 << i, 127);
do_test (0, 0, i, 16 << i, 8 << i, 127);
do_test (8 - i, 2 * i, i, 4 << i, 8 << i, 127);
do_test (8 - i, 2 * i, i, 16 << i, 8 << i, 127);
}
return ret;
}
#include <support/test-driver.c>
|
