1 | /* Measure STRCHR functions. |
2 | Copyright (C) 2013-2022 Free Software Foundation, Inc. |
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 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #define TEST_MAIN |
20 | #ifndef WIDE |
21 | # ifdef USE_FOR_STRCHRNUL |
22 | # define TEST_NAME "strchrnul" |
23 | # else |
24 | # define TEST_NAME "strchr" |
25 | # endif /* !USE_FOR_STRCHRNUL */ |
26 | #else |
27 | # ifdef USE_FOR_STRCHRNUL |
28 | # define TEST_NAME "wcschrnul" |
29 | # else |
30 | # define TEST_NAME "wcschr" |
31 | # endif /* !USE_FOR_STRCHRNUL */ |
32 | #endif /* WIDE */ |
33 | #include "bench-string.h" |
34 | |
35 | #define BIG_CHAR MAX_CHAR |
36 | |
37 | #ifndef WIDE |
38 | # ifdef USE_FOR_STRCHRNUL |
39 | # undef STRCHR |
40 | # define STRCHR strchrnul |
41 | # define simple_STRCHR simple_STRCHRNUL |
42 | # endif /* !USE_FOR_STRCHRNUL */ |
43 | # define MIDDLE_CHAR 127 |
44 | # define SMALL_CHAR 23 |
45 | #else |
46 | # ifdef USE_FOR_STRCHRNUL |
47 | # undef STRCHR |
48 | # define STRCHR wcschrnul |
49 | # define simple_STRCHR simple_WCSCHRNUL |
50 | # endif /* !USE_FOR_STRCHRNUL */ |
51 | # define MIDDLE_CHAR 1121 |
52 | # define SMALL_CHAR 851 |
53 | #endif /* WIDE */ |
54 | |
55 | #ifdef USE_FOR_STRCHRNUL |
56 | # define NULLRET(endptr) endptr |
57 | #else |
58 | # define NULLRET(endptr) NULL |
59 | #endif /* !USE_FOR_STRCHRNUL */ |
60 | |
61 | |
62 | typedef CHAR *(*proto_t) (const CHAR *, int); |
63 | |
64 | CHAR * |
65 | simple_STRCHR (const CHAR *s, int c) |
66 | { |
67 | for (; *s != (CHAR) c; ++s) |
68 | if (*s == '\0') |
69 | return NULLRET ((CHAR *) s); |
70 | return (CHAR *) s; |
71 | } |
72 | |
73 | IMPL (simple_STRCHR, 0) |
74 | IMPL (STRCHR, 1) |
75 | |
76 | static void |
77 | do_one_test (impl_t *impl, const CHAR *s, int c, const CHAR *exp_res) |
78 | { |
79 | size_t i, iters = INNER_LOOP_ITERS_LARGE; |
80 | timing_t start, stop, cur; |
81 | |
82 | TIMING_NOW (start); |
83 | for (i = 0; i < iters; ++i) |
84 | { |
85 | CALL (impl, s, c); |
86 | } |
87 | TIMING_NOW (stop); |
88 | |
89 | TIMING_DIFF (cur, start, stop); |
90 | |
91 | TIMING_PRINT_MEAN ((double) cur, (double) iters); |
92 | } |
93 | |
94 | static void |
95 | do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char) |
96 | /* For wcschr: align here means align not in bytes, |
97 | but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t)) |
98 | len for wcschr here isn't in bytes but it's number of wchar_t symbols. */ |
99 | { |
100 | size_t i; |
101 | CHAR *result; |
102 | CHAR *buf = (CHAR *) buf1; |
103 | align &= 127; |
104 | if ((align + len) * sizeof (CHAR) >= page_size) |
105 | return; |
106 | |
107 | for (i = 0; i < len; ++i) |
108 | { |
109 | buf[align + i] = 32 + 23 * i % max_char; |
110 | if (buf[align + i] == seek_char) |
111 | buf[align + i] = seek_char + 1; |
112 | else if (buf[align + i] == 0) |
113 | buf[align + i] = 1; |
114 | } |
115 | buf[align + len] = 0; |
116 | |
117 | if (pos < len) |
118 | { |
119 | buf[align + pos] = seek_char; |
120 | result = buf + align + pos; |
121 | } |
122 | else if (seek_char == 0) |
123 | result = buf + align + len; |
124 | else |
125 | result = NULLRET (buf + align + len); |
126 | |
127 | printf (format: "Length %4zd, alignment in bytes %2zd:" , |
128 | pos, align * sizeof (CHAR)); |
129 | |
130 | FOR_EACH_IMPL (impl, 0) |
131 | do_one_test (impl, s: buf + align, c: seek_char, exp_res: result); |
132 | |
133 | putchar (c: '\n'); |
134 | } |
135 | |
136 | int |
137 | test_main (void) |
138 | { |
139 | size_t i; |
140 | |
141 | test_init (); |
142 | |
143 | printf (format: "%20s" , "" ); |
144 | FOR_EACH_IMPL (impl, 0) |
145 | printf (format: "\t%s" , impl->name); |
146 | putchar (c: '\n'); |
147 | |
148 | for (i = 1; i < 8; ++i) |
149 | { |
150 | do_test (align: 0, pos: 16 << i, len: 2048, SMALL_CHAR, MIDDLE_CHAR); |
151 | do_test (align: i, pos: 16 << i, len: 2048, SMALL_CHAR, MIDDLE_CHAR); |
152 | } |
153 | |
154 | for (i = 1; i < 8; ++i) |
155 | { |
156 | do_test (align: 0, pos: 16 << i, len: 4096, SMALL_CHAR, MIDDLE_CHAR); |
157 | do_test (align: i, pos: 16 << i, len: 4096, SMALL_CHAR, MIDDLE_CHAR); |
158 | } |
159 | |
160 | for (i = 1; i < 8; ++i) |
161 | { |
162 | do_test (align: i, pos: 64, len: 256, SMALL_CHAR, MIDDLE_CHAR); |
163 | do_test (align: i, pos: 64, len: 256, SMALL_CHAR, BIG_CHAR); |
164 | } |
165 | |
166 | for (i = 0; i < 8; ++i) |
167 | { |
168 | do_test (align: 16 * i, pos: 256, len: 512, SMALL_CHAR, MIDDLE_CHAR); |
169 | do_test (align: 16 * i, pos: 256, len: 512, SMALL_CHAR, BIG_CHAR); |
170 | } |
171 | |
172 | for (i = 0; i < 32; ++i) |
173 | { |
174 | do_test (align: 0, pos: i, len: i + 1, SMALL_CHAR, MIDDLE_CHAR); |
175 | do_test (align: 0, pos: i, len: i + 1, SMALL_CHAR, BIG_CHAR); |
176 | } |
177 | |
178 | for (i = 1; i < 8; ++i) |
179 | { |
180 | do_test (align: 0, pos: 16 << i, len: 2048, seek_char: 0, MIDDLE_CHAR); |
181 | do_test (align: i, pos: 16 << i, len: 2048, seek_char: 0, MIDDLE_CHAR); |
182 | } |
183 | |
184 | for (i = 1; i < 8; ++i) |
185 | { |
186 | do_test (align: 0, pos: 16 << i, len: 4096, seek_char: 0, MIDDLE_CHAR); |
187 | do_test (align: i, pos: 16 << i, len: 4096, seek_char: 0, MIDDLE_CHAR); |
188 | } |
189 | |
190 | for (i = 1; i < 8; ++i) |
191 | { |
192 | do_test (align: i, pos: 64, len: 256, seek_char: 0, MIDDLE_CHAR); |
193 | do_test (align: i, pos: 64, len: 256, seek_char: 0, BIG_CHAR); |
194 | } |
195 | |
196 | for (i = 0; i < 8; ++i) |
197 | { |
198 | do_test (align: 16 * i, pos: 256, len: 512, seek_char: 0, MIDDLE_CHAR); |
199 | do_test (align: 16 * i, pos: 256, len: 512, seek_char: 0, BIG_CHAR); |
200 | } |
201 | |
202 | for (i = 0; i < 32; ++i) |
203 | { |
204 | do_test (align: 0, pos: i, len: i + 1, seek_char: 0, MIDDLE_CHAR); |
205 | do_test (align: 0, pos: i, len: i + 1, seek_char: 0, BIG_CHAR); |
206 | } |
207 | |
208 | return ret; |
209 | } |
210 | |
211 | #include <support/test-driver.c> |
212 | |