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97020474 | 1 | /* Measure memccpy functions. |
04277e02 | 2 | Copyright (C) 2013-2019 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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
97020474 SP |
18 | |
19 | #define TEST_MAIN | |
20 | #define TEST_NAME "memccpy" | |
21 | #include "bench-string.h" | |
22 | ||
97020474 | 23 | void * |
16f87cfd | 24 | generic_memccpy (void *dst, const void *src, int c, size_t n) |
97020474 SP |
25 | { |
26 | void *p = memchr (src, c, n); | |
27 | ||
28 | if (p != NULL) | |
29 | return mempcpy (dst, src, p - src + 1); | |
30 | ||
31 | memcpy (dst, src, n); | |
32 | return NULL; | |
33 | } | |
34 | ||
16f87cfd WD |
35 | IMPL (memccpy, 1) |
36 | IMPL (generic_memccpy, 0) | |
37 | ||
97020474 SP |
38 | typedef void *(*proto_t) (void *, const void *, int c, size_t); |
39 | ||
40 | static void | |
41 | do_one_test (impl_t *impl, void *dst, const void *src, int c, size_t len, | |
42 | size_t n) | |
43 | { | |
afe23eb0 | 44 | size_t i, iters = INNER_LOOP_ITERS_LARGE; |
44558701 WN |
45 | timing_t start, stop, cur; |
46 | ||
44558701 WN |
47 | TIMING_NOW (start); |
48 | for (i = 0; i < iters; ++i) | |
97020474 | 49 | { |
44558701 | 50 | CALL (impl, dst, src, c, n); |
97020474 | 51 | } |
44558701 WN |
52 | TIMING_NOW (stop); |
53 | ||
54 | TIMING_DIFF (cur, start, stop); | |
55 | ||
56 | TIMING_PRINT_MEAN ((double) cur, (double) iters); | |
97020474 SP |
57 | } |
58 | ||
59 | static void | |
60 | do_test (size_t align1, size_t align2, int c, size_t len, size_t n, | |
61 | int max_char) | |
62 | { | |
63 | size_t i; | |
64 | char *s1, *s2; | |
65 | ||
66 | align1 &= 7; | |
67 | if (align1 + len >= page_size) | |
68 | return; | |
69 | ||
70 | align2 &= 7; | |
71 | if (align2 + len >= page_size) | |
72 | return; | |
73 | ||
74 | s1 = (char *) (buf1 + align1); | |
75 | s2 = (char *) (buf2 + align2); | |
76 | ||
77 | for (i = 0; i < len - 1; ++i) | |
78 | { | |
79 | s1[i] = 32 + 23 * i % (max_char - 32); | |
80 | if (s1[i] == (char) c) | |
81 | --s1[i]; | |
82 | } | |
83 | s1[len - 1] = c; | |
84 | for (i = len; i + align1 < page_size && i < len + 64; ++i) | |
85 | s1[i] = 32 + 32 * i % (max_char - 32); | |
86 | ||
44558701 | 87 | printf ("Length %4zd, n %4zd, char %d, alignment %2zd/%2zd:", len, n, c, align1, align2); |
97020474 SP |
88 | |
89 | FOR_EACH_IMPL (impl, 0) | |
90 | do_one_test (impl, s2, s1, c, len, n); | |
91 | ||
44558701 | 92 | putchar ('\n'); |
97020474 SP |
93 | } |
94 | ||
95 | int | |
96 | test_main (void) | |
97 | { | |
98 | size_t i; | |
99 | ||
100 | test_init (); | |
101 | ||
102 | printf ("%28s", ""); | |
103 | FOR_EACH_IMPL (impl, 0) | |
104 | printf ("\t%s", impl->name); | |
105 | putchar ('\n'); | |
106 | ||
107 | for (i = 1; i < 8; ++i) | |
108 | { | |
109 | do_test (i, i, 12, 16, 16, 127); | |
110 | do_test (i, i, 23, 16, 16, 255); | |
111 | do_test (i, 2 * i, 28, 16, 16, 127); | |
112 | do_test (2 * i, i, 31, 16, 16, 255); | |
113 | do_test (8 - i, 2 * i, 1, 1 << i, 2 << i, 127); | |
114 | do_test (2 * i, 8 - i, 17, 2 << i, 1 << i, 127); | |
115 | do_test (8 - i, 2 * i, 0, 1 << i, 2 << i, 255); | |
116 | do_test (2 * i, 8 - i, i, 2 << i, 1 << i, 255); | |
117 | } | |
118 | ||
119 | for (i = 1; i < 8; ++i) | |
120 | { | |
121 | do_test (0, 0, i, 4 << i, 8 << i, 127); | |
122 | do_test (0, 0, i, 16 << i, 8 << i, 127); | |
123 | do_test (8 - i, 2 * i, i, 4 << i, 8 << i, 127); | |
124 | do_test (8 - i, 2 * i, i, 16 << i, 8 << i, 127); | |
125 | } | |
126 | ||
127 | return ret; | |
128 | } | |
129 | ||
b598e134 | 130 | #include <support/test-driver.c> |