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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> | |
16f87cfd | 20 | #include <stdint.h> |
97020474 SP |
21 | |
22 | #define TEST_MAIN | |
23 | #define TEST_NAME "rawmemchr" | |
24 | #include "bench-string.h" | |
25 | ||
26 | typedef char *(*proto_t) (const char *, int); | |
97020474 SP |
27 | |
28 | char * | |
16f87cfd | 29 | generic_rawmemchr (const char *s, int c) |
97020474 | 30 | { |
16f87cfd WD |
31 | if (c != 0) |
32 | return memchr (s, c, PTRDIFF_MAX); | |
33 | return (char *)s + strlen (s); | |
97020474 SP |
34 | } |
35 | ||
16f87cfd WD |
36 | IMPL (rawmemchr, 1) |
37 | IMPL (generic_rawmemchr, 0) | |
38 | ||
97020474 SP |
39 | static void |
40 | do_one_test (impl_t *impl, const char *s, int c, char *exp_res) | |
41 | { | |
44558701 WN |
42 | size_t i, iters = INNER_LOOP_ITERS; |
43 | timing_t start, stop, cur; | |
97020474 SP |
44 | char *res = CALL (impl, s, c); |
45 | if (res != exp_res) | |
46 | { | |
47 | error (0, 0, "Wrong result in function %s %p %p", impl->name, | |
48 | res, exp_res); | |
49 | ret = 1; | |
50 | return; | |
51 | } | |
52 | ||
44558701 WN |
53 | TIMING_NOW (start); |
54 | for (i = 0; i < iters; ++i) | |
97020474 | 55 | { |
44558701 | 56 | CALL (impl, s, c); |
97020474 | 57 | } |
44558701 WN |
58 | TIMING_NOW (stop); |
59 | ||
60 | TIMING_DIFF (cur, start, stop); | |
61 | ||
62 | TIMING_PRINT_MEAN ((double) cur, (double) iters); | |
97020474 SP |
63 | } |
64 | ||
65 | static void | |
66 | do_test (size_t align, size_t pos, size_t len, int seek_char) | |
67 | { | |
68 | size_t i; | |
69 | char *result; | |
70 | ||
71 | align &= 7; | |
72 | if (align + len >= page_size) | |
73 | return; | |
74 | ||
75 | for (i = 0; i < len; ++i) | |
76 | { | |
77 | buf1[align + i] = 1 + 23 * i % 127; | |
78 | if (buf1[align + i] == seek_char) | |
79 | buf1[align + i] = seek_char + 1; | |
80 | } | |
81 | buf1[align + len] = 0; | |
82 | ||
83 | assert (pos < len); | |
84 | ||
85 | buf1[align + pos] = seek_char; | |
86 | buf1[align + len] = -seek_char; | |
87 | result = (char *) (buf1 + align + pos); | |
88 | ||
44558701 | 89 | printf ("Length %4zd, alignment %2zd:", pos, align); |
97020474 SP |
90 | |
91 | FOR_EACH_IMPL (impl, 0) | |
92 | do_one_test (impl, (char *) (buf1 + align), seek_char, result); | |
93 | ||
44558701 | 94 | putchar ('\n'); |
97020474 SP |
95 | } |
96 | ||
97 | int | |
98 | test_main (void) | |
99 | { | |
100 | size_t i; | |
101 | ||
102 | test_init (); | |
103 | ||
104 | printf ("%20s", ""); | |
105 | FOR_EACH_IMPL (impl, 0) | |
106 | printf ("\t%s", impl->name); | |
107 | putchar ('\n'); | |
108 | ||
109 | for (i = 1; i < 7; ++i) | |
110 | { | |
111 | do_test (0, 16 << i, 2048, 23); | |
112 | do_test (i, 64, 256, 23); | |
113 | do_test (0, 16 << i, 2048, 0); | |
114 | do_test (i, 64, 256, 0); | |
115 | } | |
116 | for (i = 1; i < 32; ++i) | |
117 | { | |
118 | do_test (0, i, i + 1, 23); | |
119 | do_test (0, i, i + 1, 0); | |
120 | } | |
121 | ||
122 | return ret; | |
123 | } | |
124 | ||
b598e134 | 125 | #include <support/test-driver.c> |