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97020474 | 1 | /* Measure memchr 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 | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <assert.h> | |
20 | ||
21 | #define TEST_MAIN | |
22 | #define TEST_NAME "rawmemchr" | |
23 | #include "bench-string.h" | |
24 | ||
25 | typedef char *(*proto_t) (const char *, int); | |
26 | char *simple_rawmemchr (const char *, int); | |
27 | ||
28 | IMPL (simple_rawmemchr, 0) | |
29 | IMPL (rawmemchr, 1) | |
30 | ||
31 | char * | |
32 | simple_rawmemchr (const char *s, int c) | |
33 | { | |
34 | while (1) | |
35 | if (*s++ == (char) c) | |
36 | return (char *) s - 1; | |
37 | return NULL; | |
38 | } | |
39 | ||
40 | static void | |
41 | do_one_test (impl_t *impl, const char *s, int c, char *exp_res) | |
42 | { | |
44558701 WN |
43 | size_t i, iters = INNER_LOOP_ITERS; |
44 | timing_t start, stop, cur; | |
97020474 SP |
45 | char *res = CALL (impl, s, c); |
46 | if (res != exp_res) | |
47 | { | |
48 | error (0, 0, "Wrong result in function %s %p %p", impl->name, | |
49 | res, exp_res); | |
50 | ret = 1; | |
51 | return; | |
52 | } | |
53 | ||
44558701 WN |
54 | TIMING_NOW (start); |
55 | for (i = 0; i < iters; ++i) | |
97020474 | 56 | { |
44558701 | 57 | CALL (impl, s, c); |
97020474 | 58 | } |
44558701 WN |
59 | TIMING_NOW (stop); |
60 | ||
61 | TIMING_DIFF (cur, start, stop); | |
62 | ||
63 | TIMING_PRINT_MEAN ((double) cur, (double) iters); | |
97020474 SP |
64 | } |
65 | ||
66 | static void | |
67 | do_test (size_t align, size_t pos, size_t len, int seek_char) | |
68 | { | |
69 | size_t i; | |
70 | char *result; | |
71 | ||
72 | align &= 7; | |
73 | if (align + len >= page_size) | |
74 | return; | |
75 | ||
76 | for (i = 0; i < len; ++i) | |
77 | { | |
78 | buf1[align + i] = 1 + 23 * i % 127; | |
79 | if (buf1[align + i] == seek_char) | |
80 | buf1[align + i] = seek_char + 1; | |
81 | } | |
82 | buf1[align + len] = 0; | |
83 | ||
84 | assert (pos < len); | |
85 | ||
86 | buf1[align + pos] = seek_char; | |
87 | buf1[align + len] = -seek_char; | |
88 | result = (char *) (buf1 + align + pos); | |
89 | ||
44558701 | 90 | printf ("Length %4zd, alignment %2zd:", pos, align); |
97020474 SP |
91 | |
92 | FOR_EACH_IMPL (impl, 0) | |
93 | do_one_test (impl, (char *) (buf1 + align), seek_char, result); | |
94 | ||
44558701 | 95 | putchar ('\n'); |
97020474 SP |
96 | } |
97 | ||
98 | int | |
99 | test_main (void) | |
100 | { | |
101 | size_t i; | |
102 | ||
103 | test_init (); | |
104 | ||
105 | printf ("%20s", ""); | |
106 | FOR_EACH_IMPL (impl, 0) | |
107 | printf ("\t%s", impl->name); | |
108 | putchar ('\n'); | |
109 | ||
110 | for (i = 1; i < 7; ++i) | |
111 | { | |
112 | do_test (0, 16 << i, 2048, 23); | |
113 | do_test (i, 64, 256, 23); | |
114 | do_test (0, 16 << i, 2048, 0); | |
115 | do_test (i, 64, 256, 0); | |
116 | } | |
117 | for (i = 1; i < 32; ++i) | |
118 | { | |
119 | do_test (0, i, i + 1, 23); | |
120 | do_test (0, i, i + 1, 0); | |
121 | } | |
122 | ||
123 | return ret; | |
124 | } | |
125 | ||
b598e134 | 126 | #include <support/test-driver.c> |