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97020474 | 1 | /* Measure memmove functions. |
bfff8b1b | 2 | Copyright (C) 2013-2017 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 TEST_BCOPY | |
21 | # define TEST_NAME "bcopy" | |
22 | #else | |
23 | # define TEST_NAME "memmove" | |
24 | #endif | |
25 | #include "bench-string.h" | |
26 | ||
27 | char *simple_memmove (char *, const char *, size_t); | |
28 | ||
29 | #ifdef TEST_BCOPY | |
30 | typedef void (*proto_t) (const char *, char *, size_t); | |
31 | void simple_bcopy (const char *, char *, size_t); | |
32 | ||
33 | IMPL (simple_bcopy, 0) | |
34 | IMPL (bcopy, 1) | |
35 | ||
36 | void | |
37 | simple_bcopy (const char *src, char *dst, size_t n) | |
38 | { | |
39 | simple_memmove (dst, src, n); | |
40 | } | |
41 | #else | |
42 | typedef char *(*proto_t) (char *, const char *, size_t); | |
43 | ||
44 | IMPL (simple_memmove, 0) | |
45 | IMPL (memmove, 1) | |
46 | #endif | |
47 | ||
48 | char * | |
85c2e611 | 49 | inhibit_loop_to_libcall |
97020474 SP |
50 | simple_memmove (char *dst, const char *src, size_t n) |
51 | { | |
52 | char *ret = dst; | |
53 | if (src < dst) | |
54 | { | |
55 | dst += n; | |
56 | src += n; | |
57 | while (n--) | |
58 | *--dst = *--src; | |
59 | } | |
60 | else | |
61 | while (n--) | |
62 | *dst++ = *src++; | |
63 | return ret; | |
64 | } | |
65 | ||
66 | static void | |
67 | do_one_test (impl_t *impl, char *dst, char *src, const char *orig_src, | |
68 | size_t len) | |
69 | { | |
44558701 WN |
70 | size_t i, iters = INNER_LOOP_ITERS; |
71 | timing_t start, stop, cur; | |
72 | ||
447720b0 | 73 | /* This also clears the destination buffer set by the previous run. */ |
97020474 SP |
74 | memcpy (src, orig_src, len); |
75 | #ifdef TEST_BCOPY | |
76 | CALL (impl, src, dst, len); | |
77 | #else | |
78 | char *res; | |
79 | ||
80 | res = CALL (impl, dst, src, len); | |
81 | if (res != dst) | |
82 | { | |
83 | error (0, 0, "Wrong result in function %s %p %p", impl->name, | |
84 | res, dst); | |
85 | ret = 1; | |
86 | return; | |
87 | } | |
88 | #endif | |
89 | ||
90 | if (memcmp (dst, orig_src, len) != 0) | |
91 | { | |
92 | error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"", | |
93 | impl->name, dst, src); | |
94 | ret = 1; | |
95 | return; | |
96 | } | |
97 | ||
44558701 WN |
98 | TIMING_NOW (start); |
99 | for (i = 0; i < iters; ++i) | |
97020474 | 100 | { |
97020474 | 101 | #ifdef TEST_BCOPY |
44558701 | 102 | CALL (impl, src, dst, len); |
97020474 | 103 | #else |
44558701 | 104 | CALL (impl, dst, src, len); |
97020474 | 105 | #endif |
97020474 | 106 | } |
44558701 WN |
107 | TIMING_NOW (stop); |
108 | ||
109 | TIMING_DIFF (cur, start, stop); | |
110 | ||
111 | TIMING_PRINT_MEAN ((double) cur, (double) iters); | |
97020474 SP |
112 | } |
113 | ||
114 | static void | |
115 | do_test (size_t align1, size_t align2, size_t len) | |
116 | { | |
117 | size_t i, j; | |
118 | char *s1, *s2; | |
119 | ||
120 | align1 &= 63; | |
121 | if (align1 + len >= page_size) | |
122 | return; | |
123 | ||
124 | align2 &= 63; | |
125 | if (align2 + len >= page_size) | |
126 | return; | |
127 | ||
128 | s1 = (char *) (buf1 + align1); | |
129 | s2 = (char *) (buf2 + align2); | |
130 | ||
131 | for (i = 0, j = 1; i < len; i++, j += 23) | |
132 | s1[i] = j; | |
133 | ||
44558701 | 134 | printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2); |
97020474 SP |
135 | |
136 | FOR_EACH_IMPL (impl, 0) | |
137 | do_one_test (impl, s2, (char *) (buf2 + align1), s1, len); | |
138 | ||
44558701 | 139 | putchar ('\n'); |
97020474 SP |
140 | } |
141 | ||
b598e134 | 142 | static int |
97020474 SP |
143 | test_main (void) |
144 | { | |
145 | size_t i; | |
146 | ||
147 | test_init (); | |
148 | ||
149 | printf ("%23s", ""); | |
150 | FOR_EACH_IMPL (impl, 0) | |
151 | printf ("\t%s", impl->name); | |
152 | putchar ('\n'); | |
153 | ||
154 | for (i = 0; i < 14; ++i) | |
155 | { | |
156 | do_test (0, 32, 1 << i); | |
157 | do_test (32, 0, 1 << i); | |
158 | do_test (0, i, 1 << i); | |
159 | do_test (i, 0, 1 << i); | |
160 | } | |
161 | ||
162 | for (i = 0; i < 32; ++i) | |
163 | { | |
164 | do_test (0, 32, i); | |
165 | do_test (32, 0, i); | |
166 | do_test (0, i, i); | |
167 | do_test (i, 0, i); | |
168 | } | |
169 | ||
170 | for (i = 3; i < 32; ++i) | |
171 | { | |
172 | if ((i & (i - 1)) == 0) | |
173 | continue; | |
174 | do_test (0, 32, 16 * i); | |
175 | do_test (32, 0, 16 * i); | |
176 | do_test (0, i, 16 * i); | |
177 | do_test (i, 0, 16 * i); | |
178 | } | |
179 | ||
aea44bf6 L |
180 | for (i = 32; i < 64; ++i) |
181 | { | |
182 | do_test (0, 0, 32 * i); | |
183 | do_test (i, 0, 32 * i); | |
184 | do_test (0, i, 32 * i); | |
185 | do_test (i, i, 32 * i); | |
186 | } | |
187 | ||
97020474 SP |
188 | return ret; |
189 | } | |
190 | ||
b598e134 | 191 | #include <support/test-driver.c> |