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97020474 | 1 | /* Measure memccpy functions. |
688903eb | 2 | Copyright (C) 2013-2018 Free Software Foundation, Inc. |
97020474 SP |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #define TEST_MAIN | |
20 | #define TEST_NAME "memccpy" | |
21 | #include "bench-string.h" | |
22 | ||
23 | void *simple_memccpy (void *, const void *, int, size_t); | |
24 | void *stupid_memccpy (void *, const void *, int, size_t); | |
25 | ||
26 | IMPL (stupid_memccpy, 0) | |
27 | IMPL (simple_memccpy, 0) | |
28 | IMPL (memccpy, 1) | |
29 | ||
30 | void * | |
31 | simple_memccpy (void *dst, const void *src, int c, size_t n) | |
32 | { | |
33 | const char *s = src; | |
34 | char *d = dst; | |
35 | ||
36 | while (n-- > 0) | |
37 | if ((*d++ = *s++) == (char) c) | |
38 | return d; | |
39 | ||
40 | return NULL; | |
41 | } | |
42 | ||
43 | void * | |
44 | stupid_memccpy (void *dst, const void *src, int c, size_t n) | |
45 | { | |
46 | void *p = memchr (src, c, n); | |
47 | ||
48 | if (p != NULL) | |
49 | return mempcpy (dst, src, p - src + 1); | |
50 | ||
51 | memcpy (dst, src, n); | |
52 | return NULL; | |
53 | } | |
54 | ||
55 | typedef void *(*proto_t) (void *, const void *, int c, size_t); | |
56 | ||
57 | static void | |
58 | do_one_test (impl_t *impl, void *dst, const void *src, int c, size_t len, | |
59 | size_t n) | |
60 | { | |
44558701 WN |
61 | size_t i, iters = INNER_LOOP_ITERS; |
62 | timing_t start, stop, cur; | |
63 | ||
44558701 WN |
64 | TIMING_NOW (start); |
65 | for (i = 0; i < iters; ++i) | |
97020474 | 66 | { |
44558701 | 67 | CALL (impl, dst, src, c, n); |
97020474 | 68 | } |
44558701 WN |
69 | TIMING_NOW (stop); |
70 | ||
71 | TIMING_DIFF (cur, start, stop); | |
72 | ||
73 | TIMING_PRINT_MEAN ((double) cur, (double) iters); | |
97020474 SP |
74 | } |
75 | ||
76 | static void | |
77 | do_test (size_t align1, size_t align2, int c, size_t len, size_t n, | |
78 | int max_char) | |
79 | { | |
80 | size_t i; | |
81 | char *s1, *s2; | |
82 | ||
83 | align1 &= 7; | |
84 | if (align1 + len >= page_size) | |
85 | return; | |
86 | ||
87 | align2 &= 7; | |
88 | if (align2 + len >= page_size) | |
89 | return; | |
90 | ||
91 | s1 = (char *) (buf1 + align1); | |
92 | s2 = (char *) (buf2 + align2); | |
93 | ||
94 | for (i = 0; i < len - 1; ++i) | |
95 | { | |
96 | s1[i] = 32 + 23 * i % (max_char - 32); | |
97 | if (s1[i] == (char) c) | |
98 | --s1[i]; | |
99 | } | |
100 | s1[len - 1] = c; | |
101 | for (i = len; i + align1 < page_size && i < len + 64; ++i) | |
102 | s1[i] = 32 + 32 * i % (max_char - 32); | |
103 | ||
44558701 | 104 | printf ("Length %4zd, n %4zd, char %d, alignment %2zd/%2zd:", len, n, c, align1, align2); |
97020474 SP |
105 | |
106 | FOR_EACH_IMPL (impl, 0) | |
107 | do_one_test (impl, s2, s1, c, len, n); | |
108 | ||
44558701 | 109 | putchar ('\n'); |
97020474 SP |
110 | } |
111 | ||
112 | int | |
113 | test_main (void) | |
114 | { | |
115 | size_t i; | |
116 | ||
117 | test_init (); | |
118 | ||
119 | printf ("%28s", ""); | |
120 | FOR_EACH_IMPL (impl, 0) | |
121 | printf ("\t%s", impl->name); | |
122 | putchar ('\n'); | |
123 | ||
124 | for (i = 1; i < 8; ++i) | |
125 | { | |
126 | do_test (i, i, 12, 16, 16, 127); | |
127 | do_test (i, i, 23, 16, 16, 255); | |
128 | do_test (i, 2 * i, 28, 16, 16, 127); | |
129 | do_test (2 * i, i, 31, 16, 16, 255); | |
130 | do_test (8 - i, 2 * i, 1, 1 << i, 2 << i, 127); | |
131 | do_test (2 * i, 8 - i, 17, 2 << i, 1 << i, 127); | |
132 | do_test (8 - i, 2 * i, 0, 1 << i, 2 << i, 255); | |
133 | do_test (2 * i, 8 - i, i, 2 << i, 1 << i, 255); | |
134 | } | |
135 | ||
136 | for (i = 1; i < 8; ++i) | |
137 | { | |
138 | do_test (0, 0, i, 4 << i, 8 << i, 127); | |
139 | do_test (0, 0, i, 16 << i, 8 << i, 127); | |
140 | do_test (8 - i, 2 * i, i, 4 << i, 8 << i, 127); | |
141 | do_test (8 - i, 2 * i, i, 16 << i, 8 << i, 127); | |
142 | } | |
143 | ||
144 | return ret; | |
145 | } | |
146 | ||
b598e134 | 147 | #include <support/test-driver.c> |