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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 | ||
88eefd34 | 19 | #ifndef WIDE |
88eefd34 SL |
20 | # define SMALL_CHAR 127 |
21 | #else | |
88eefd34 SL |
22 | # define SMALL_CHAR 1273 |
23 | #endif /* WIDE */ | |
24 | ||
e029e2e5 AZ |
25 | #ifndef USE_AS_MEMRCHR |
26 | # define TEST_MAIN | |
88eefd34 SL |
27 | # ifndef WIDE |
28 | # define TEST_NAME "memchr" | |
29 | # else | |
30 | # define TEST_NAME "wmemchr" | |
31 | # endif /* WIDE */ | |
e029e2e5 | 32 | # include "bench-string.h" |
97020474 | 33 | |
88eefd34 | 34 | # ifndef WIDE |
88eefd34 SL |
35 | # define SIMPLE_MEMCHR simple_memchr |
36 | # else | |
88eefd34 SL |
37 | # define SIMPLE_MEMCHR simple_wmemchr |
38 | # endif /* WIDE */ | |
39 | ||
40 | typedef CHAR *(*proto_t) (const CHAR *, int, size_t); | |
41 | CHAR *SIMPLE_MEMCHR (const CHAR *, int, size_t); | |
97020474 | 42 | |
88eefd34 SL |
43 | IMPL (SIMPLE_MEMCHR, 0) |
44 | IMPL (MEMCHR, 1) | |
97020474 | 45 | |
88eefd34 SL |
46 | CHAR * |
47 | SIMPLE_MEMCHR (const CHAR *s, int c, size_t n) | |
97020474 SP |
48 | { |
49 | while (n--) | |
88eefd34 SL |
50 | if (*s++ == (CHAR) c) |
51 | return (CHAR *) s - 1; | |
97020474 SP |
52 | return NULL; |
53 | } | |
88eefd34 | 54 | #endif /* !USE_AS_MEMRCHR */ |
97020474 SP |
55 | |
56 | static void | |
61c98291 | 57 | do_one_test (impl_t *impl, const CHAR *s, int c, size_t n) |
97020474 | 58 | { |
44558701 WN |
59 | size_t i, iters = INNER_LOOP_ITERS; |
60 | timing_t start, stop, cur; | |
61 | ||
44558701 WN |
62 | TIMING_NOW (start); |
63 | for (i = 0; i < iters; ++i) | |
97020474 | 64 | { |
44558701 | 65 | CALL (impl, s, c, n); |
97020474 | 66 | } |
44558701 WN |
67 | TIMING_NOW (stop); |
68 | ||
69 | TIMING_DIFF (cur, start, stop); | |
70 | ||
71 | TIMING_PRINT_MEAN ((double) cur, (double) iters); | |
97020474 SP |
72 | } |
73 | ||
74 | static void | |
75 | do_test (size_t align, size_t pos, size_t len, int seek_char) | |
76 | { | |
77 | size_t i; | |
97020474 SP |
78 | |
79 | align &= 7; | |
88eefd34 | 80 | if ((align + len) * sizeof (CHAR) >= page_size) |
97020474 SP |
81 | return; |
82 | ||
88eefd34 SL |
83 | CHAR *buf = (CHAR *) (buf1); |
84 | ||
97020474 SP |
85 | for (i = 0; i < len; ++i) |
86 | { | |
88eefd34 SL |
87 | buf[align + i] = 1 + 23 * i % SMALL_CHAR; |
88 | if (buf[align + i] == seek_char) | |
89 | buf[align + i] = seek_char + 1; | |
97020474 | 90 | } |
88eefd34 | 91 | buf[align + len] = 0; |
97020474 SP |
92 | |
93 | if (pos < len) | |
94 | { | |
88eefd34 SL |
95 | buf[align + pos] = seek_char; |
96 | buf[align + len] = -seek_char; | |
97020474 SP |
97 | } |
98 | else | |
99 | { | |
88eefd34 | 100 | buf[align + len] = seek_char; |
97020474 SP |
101 | } |
102 | ||
6b69f98d L |
103 | printf ("Length %4zd, position %4zd, alignment %2zd:", |
104 | len, pos, align); | |
97020474 SP |
105 | |
106 | FOR_EACH_IMPL (impl, 0) | |
61c98291 | 107 | do_one_test (impl, (CHAR *) (buf + align), seek_char, len); |
97020474 | 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 ("%20s", ""); | |
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 (0, 16 << i, 2048, 23); | |
127 | do_test (i, 64, 256, 23); | |
128 | do_test (0, 16 << i, 2048, 0); | |
129 | do_test (i, 64, 256, 0); | |
6b69f98d L |
130 | #ifdef USE_AS_MEMRCHR |
131 | /* Also test the position close to the beginning for memrchr. */ | |
132 | do_test (0, i, 256, 23); | |
133 | do_test (0, i, 256, 0); | |
134 | do_test (i, i, 256, 23); | |
135 | do_test (i, i, 256, 0); | |
136 | #endif | |
97020474 SP |
137 | } |
138 | for (i = 1; i < 32; ++i) | |
139 | { | |
140 | do_test (0, i, i + 1, 23); | |
141 | do_test (0, i, i + 1, 0); | |
6b69f98d L |
142 | do_test (i, i, i + 1, 23); |
143 | do_test (i, i, i + 1, 0); | |
144 | #ifdef USE_AS_MEMRCHR | |
145 | /* Also test the position close to the beginning for memrchr. */ | |
146 | do_test (0, 1, i + 1, 23); | |
147 | do_test (0, 2, i + 1, 0); | |
148 | #endif | |
97020474 SP |
149 | } |
150 | ||
151 | return ret; | |
152 | } | |
153 | ||
b598e134 | 154 | #include <support/test-driver.c> |