Update.
[glibc.git] / string / test-memcpy.c
blobadc90da7675eb01085aaf9d2c3999f49b3ef949e
1 /* Test and measure memcpy functions.
2 Copyright (C) 1999, 2002, 2003 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Written by Jakub Jelinek <jakub@redhat.com>, 1999.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
21 #ifndef MEMCPY_RESULT
22 # define MEMCPY_RESULT(dst, len) dst
23 # define MIN_PAGE_SIZE 131072
24 # define TEST_MAIN
25 # include "test-string.h"
27 char *simple_memcpy (char *, const char *, size_t);
28 char *builtin_memcpy (char *, const char *, size_t);
30 IMPL (simple_memcpy, 0)
31 IMPL (builtin_memcpy, 0)
32 IMPL (memcpy, 1)
34 char *
35 simple_memcpy (char *dst, const char *src, size_t n)
37 char *ret = dst;
38 while (n--)
39 *dst++ = *src++;
40 return ret;
43 char *
44 builtin_memcpy (char *dst, const char *src, size_t n)
46 return __builtin_memcpy (dst, src, n);
48 #endif
50 typedef char *(*proto_t) (char *, const char *, size_t);
52 static void
53 do_one_test (impl_t *impl, char *dst, const char *src,
54 size_t len)
56 if (CALL (impl, dst, src, len) != MEMCPY_RESULT (dst, len))
58 error (0, 0, "Wrong result in function %s %p %p", impl->name,
59 CALL (impl, dst, src, len), MEMCPY_RESULT (dst, len));
60 ret = 1;
61 return;
64 if (memcmp (dst, src, len) != 0)
66 error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
67 impl->name, dst, src);
68 ret = 1;
69 return;
72 if (HP_TIMING_AVAIL)
74 hp_timing_t start __attribute ((unused));
75 hp_timing_t stop __attribute ((unused));
76 hp_timing_t best_time = ~ (hp_timing_t) 0;
77 size_t i;
79 for (i = 0; i < 32; ++i)
81 HP_TIMING_NOW (start);
82 CALL (impl, dst, src, len);
83 HP_TIMING_NOW (stop);
84 HP_TIMING_BEST (best_time, start, stop);
87 printf ("\t%zd", (size_t) best_time);
91 static void
92 do_test (size_t align1, size_t align2, size_t len)
94 size_t i, j;
95 char *s1, *s2;
97 align1 &= 63;
98 if (align1 + len >= page_size)
99 return;
101 align2 &= 63;
102 if (align2 + len >= page_size)
103 return;
105 s1 = buf1 + align1;
106 s2 = buf2 + align2;
108 for (i = 0, j = 1; i < len; i++, j += 23)
109 s1[i] = j;
111 if (HP_TIMING_AVAIL)
112 printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
114 FOR_EACH_IMPL (impl, 0)
115 do_one_test (impl, s2, s1, len);
117 if (HP_TIMING_AVAIL)
118 putchar ('\n');
121 static void
122 do_random_tests (void)
124 size_t i, j, n, align1, align2, len, size1, size2, size;
125 int c;
126 unsigned char *p1, *p2;
127 unsigned char *res;
129 for (n = 0; n < ITERATIONS; n++)
131 if (n == 0)
133 len = getpagesize ();
134 size = len + 512;
135 size1 = size;
136 size2 = size;
137 align1 = 512;
138 align2 = 512;
140 else
142 if ((random () & 255) == 0)
143 size = 65536;
144 else
145 size = 768;
146 if (size > page_size)
147 size = page_size;
148 size1 = size;
149 size2 = size;
150 i = random ();
151 if (i & 3)
152 size -= 256;
153 if (i & 1)
154 size1 -= 256;
155 if (i & 2)
156 size2 -= 256;
157 if (i & 4)
159 len = random () % size;
160 align1 = size1 - len - (random () & 31);
161 align2 = size2 - len - (random () & 31);
162 if (align1 > size1)
163 align1 = 0;
164 if (align2 > size2)
165 align2 = 0;
167 else
169 align1 = random () & 63;
170 align2 = random () & 63;
171 len = random () % size;
172 if (align1 + len > size1)
173 align1 = size1 - len;
174 if (align2 + len > size2)
175 align2 = size2 - len;
178 p1 = buf1 + page_size - size1;
179 p2 = buf2 + page_size - size2;
180 c = random () & 255;
181 j = align1 + len + 256;
182 if (j > size1)
183 j = size1;
184 for (i = 0; i < j; ++i)
185 p1[i] = random () & 255;
187 FOR_EACH_IMPL (impl, 1)
189 j = align2 + len + 256;
190 if (j > size2)
191 j = size2;
192 memset (p2, c, j);
193 res = CALL (impl, p2 + align2, p1 + align1, len);
194 if (res != MEMCPY_RESULT (p2 + align2, len))
196 error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
197 n, impl->name, align1, align2, len, res,
198 MEMCPY_RESULT (p2 + align2, len));
199 ret = 1;
201 for (i = 0; i < align2; ++i)
203 if (p2[i] != c)
205 error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
206 n, impl->name, align1, align2, len);
207 ret = 1;
208 break;
211 for (i = align2 + len; i < j; ++i)
213 if (p2[i] != c)
215 error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
216 n, impl->name, align1, align2, len);
217 ret = 1;
218 break;
221 if (memcmp (p1 + align1, p2 + align2, len))
223 error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
224 n, impl->name, align1, align2, len);
225 ret = 1;
232 test_main (void)
234 size_t i;
236 test_init ();
238 printf ("%23s", "");
239 FOR_EACH_IMPL (impl, 0)
240 printf ("\t%s", impl->name);
241 putchar ('\n');
243 for (i = 0; i < 18; ++i)
245 do_test (0, 0, 1 << i);
246 do_test (i, 0, 1 << i);
247 do_test (0, i, 1 << i);
248 do_test (i, i, 1 << i);
251 for (i = 0; i < 32; ++i)
253 do_test (0, 0, i);
254 do_test (i, 0, i);
255 do_test (0, i, i);
256 do_test (i, i, i);
259 for (i = 3; i < 32; ++i)
261 if ((i & (i - 1)) == 0)
262 continue;
263 do_test (0, 0, 16 * i);
264 do_test (i, 0, 16 * i);
265 do_test (0, i, 16 * i);
266 do_test (i, i, 16 * i);
269 do_test (0, 0, getpagesize ());
271 do_random_tests ();
272 return ret;
275 #include "../test-skeleton.c"