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97020474 | 1 | /* Measure memcmp functions. |
688903eb | 2 | Copyright (C) 2013-2018 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 | #define TEST_MAIN | |
20 | #ifdef WIDE | |
21 | # define TEST_NAME "wmemcmp" | |
22 | #else | |
23 | # define TEST_NAME "memcmp" | |
24 | #endif | |
25 | #include "bench-string.h" | |
26 | #ifdef WIDE | |
27 | # include <inttypes.h> | |
28 | # include <wchar.h> | |
29 | ||
30 | # define MEMCMP wmemcmp | |
31 | # define MEMCPY wmemcpy | |
32 | # define SIMPLE_MEMCMP simple_wmemcmp | |
33 | # define CHAR wchar_t | |
34 | # define UCHAR wchar_t | |
35 | # define CHARBYTES 4 | |
36 | # define CHAR__MIN WCHAR_MIN | |
37 | # define CHAR__MAX WCHAR_MAX | |
38 | int | |
39 | simple_wmemcmp (const wchar_t *s1, const wchar_t *s2, size_t n) | |
40 | { | |
41 | int ret = 0; | |
42 | /* Warning! | |
43 | wmemcmp has to use SIGNED comparison for elements. | |
44 | memcmp has to use UNSIGNED comparison for elemnts. | |
45 | */ | |
46 | while (n-- && (ret = *s1 < *s2 ? -1 : *s1 == *s2 ? 0 : 1) == 0) {s1++; s2++;} | |
47 | return ret; | |
48 | } | |
49 | #else | |
50 | # include <limits.h> | |
51 | ||
52 | # define MEMCMP memcmp | |
53 | # define MEMCPY memcpy | |
54 | # define SIMPLE_MEMCMP simple_memcmp | |
55 | # define CHAR char | |
56 | # define MAX_CHAR 255 | |
57 | # define UCHAR unsigned char | |
58 | # define CHARBYTES 1 | |
59 | # define CHAR__MIN CHAR_MIN | |
60 | # define CHAR__MAX CHAR_MAX | |
61 | ||
62 | int | |
63 | simple_memcmp (const char *s1, const char *s2, size_t n) | |
64 | { | |
65 | int ret = 0; | |
66 | ||
67 | while (n-- && (ret = *(unsigned char *) s1++ - *(unsigned char *) s2++) == 0); | |
68 | return ret; | |
69 | } | |
70 | #endif | |
71 | ||
96e6a716 SP |
72 | # include "json-lib.h" |
73 | ||
97020474 SP |
74 | typedef int (*proto_t) (const CHAR *, const CHAR *, size_t); |
75 | ||
76 | IMPL (SIMPLE_MEMCMP, 0) | |
77 | IMPL (MEMCMP, 1) | |
78 | ||
79 | static void | |
96e6a716 SP |
80 | do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s1, |
81 | const CHAR *s2, size_t len, int exp_result) | |
97020474 | 82 | { |
44558701 WN |
83 | size_t i, iters = INNER_LOOP_ITERS; |
84 | timing_t start, stop, cur; | |
85 | ||
86 | TIMING_NOW (start); | |
87 | for (i = 0; i < iters; ++i) | |
97020474 | 88 | { |
44558701 | 89 | CALL (impl, s1, s2, len); |
97020474 | 90 | } |
44558701 WN |
91 | TIMING_NOW (stop); |
92 | ||
93 | TIMING_DIFF (cur, start, stop); | |
94 | ||
96e6a716 | 95 | json_element_double (json_ctx, (double) cur / (double) iters); |
97020474 SP |
96 | } |
97 | ||
98 | static void | |
96e6a716 SP |
99 | do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len, |
100 | int exp_result) | |
97020474 SP |
101 | { |
102 | size_t i; | |
103 | CHAR *s1, *s2; | |
104 | ||
105 | if (len == 0) | |
106 | return; | |
107 | ||
108 | align1 &= 63; | |
109 | if (align1 + (len + 1) * CHARBYTES >= page_size) | |
110 | return; | |
111 | ||
112 | align2 &= 63; | |
113 | if (align2 + (len + 1) * CHARBYTES >= page_size) | |
114 | return; | |
115 | ||
96e6a716 SP |
116 | json_element_object_begin (json_ctx); |
117 | json_attr_uint (json_ctx, "length", (double) len); | |
118 | json_attr_uint (json_ctx, "align1", (double) align1); | |
119 | json_attr_uint (json_ctx, "align2", (double) align2); | |
120 | json_array_begin (json_ctx, "timings"); | |
97020474 | 121 | |
3dfcbfa1 SP |
122 | FOR_EACH_IMPL (impl, 0) |
123 | { | |
124 | s1 = (CHAR *) (buf1 + align1); | |
125 | s2 = (CHAR *) (buf2 + align2); | |
97020474 | 126 | |
3dfcbfa1 SP |
127 | for (i = 0; i < len; i++) |
128 | s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % CHAR__MAX; | |
97020474 | 129 | |
3dfcbfa1 SP |
130 | s1[len] = align1; |
131 | s2[len] = align2; | |
132 | s2[len - 1] -= exp_result; | |
97020474 | 133 | |
96e6a716 | 134 | do_one_test (json_ctx, impl, s1, s2, len, exp_result); |
014efdd7 | 135 | alloc_bufs (); |
3dfcbfa1 | 136 | } |
97020474 | 137 | |
96e6a716 SP |
138 | json_array_end (json_ctx); |
139 | json_element_object_end (json_ctx); | |
97020474 SP |
140 | } |
141 | ||
142 | int | |
143 | test_main (void) | |
144 | { | |
96e6a716 | 145 | json_ctx_t json_ctx; |
97020474 SP |
146 | size_t i; |
147 | ||
148 | test_init (); | |
149 | ||
96e6a716 SP |
150 | json_init (&json_ctx, 0, stdout); |
151 | ||
152 | json_document_begin (&json_ctx); | |
153 | json_attr_string (&json_ctx, "timing_type", TIMING_TYPE); | |
154 | ||
155 | json_attr_object_begin (&json_ctx, "functions"); | |
156 | json_attr_object_begin (&json_ctx, TEST_NAME); | |
157 | json_attr_string (&json_ctx, "bench-variant", "default"); | |
158 | ||
159 | json_array_begin (&json_ctx, "ifuncs"); | |
97020474 | 160 | FOR_EACH_IMPL (impl, 0) |
96e6a716 SP |
161 | json_element_string (&json_ctx, impl->name); |
162 | json_array_end (&json_ctx); | |
97020474 | 163 | |
96e6a716 | 164 | json_array_begin (&json_ctx, "results"); |
97020474 SP |
165 | for (i = 1; i < 16; ++i) |
166 | { | |
96e6a716 SP |
167 | do_test (&json_ctx, i * CHARBYTES, i * CHARBYTES, i, 0); |
168 | do_test (&json_ctx, i * CHARBYTES, i * CHARBYTES, i, 1); | |
169 | do_test (&json_ctx, i * CHARBYTES, i * CHARBYTES, i, -1); | |
97020474 SP |
170 | } |
171 | ||
172 | for (i = 0; i < 16; ++i) | |
173 | { | |
96e6a716 SP |
174 | do_test (&json_ctx, 0, 0, i, 0); |
175 | do_test (&json_ctx, 0, 0, i, 1); | |
176 | do_test (&json_ctx, 0, 0, i, -1); | |
97020474 SP |
177 | } |
178 | ||
179 | for (i = 1; i < 10; ++i) | |
180 | { | |
96e6a716 SP |
181 | do_test (&json_ctx, 0, 0, 2 << i, 0); |
182 | do_test (&json_ctx, 0, 0, 2 << i, 1); | |
183 | do_test (&json_ctx, 0, 0, 2 << i, -1); | |
184 | do_test (&json_ctx, 0, 0, 16 << i, 0); | |
185 | do_test (&json_ctx, (8 - i) * CHARBYTES, (2 * i) * CHARBYTES, 16 << i, 0); | |
186 | do_test (&json_ctx, 0, 0, 16 << i, 1); | |
187 | do_test (&json_ctx, 0, 0, 16 << i, -1); | |
97020474 SP |
188 | } |
189 | ||
190 | for (i = 1; i < 8; ++i) | |
191 | { | |
96e6a716 SP |
192 | do_test (&json_ctx, i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, 0); |
193 | do_test (&json_ctx, i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, 1); | |
194 | do_test (&json_ctx, i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, -1); | |
97020474 SP |
195 | } |
196 | ||
96e6a716 SP |
197 | json_array_end (&json_ctx); |
198 | json_attr_object_end (&json_ctx); | |
199 | json_attr_object_end (&json_ctx); | |
200 | json_document_end (&json_ctx); | |
201 | ||
97020474 SP |
202 | return ret; |
203 | } | |
b598e134 AZ |
204 | |
205 | #include <support/test-driver.c> |