1 /* Test and measure memcpy functions.
2 Copyright (C) 1999, 2002, 2003, 2005 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
22 # define MEMCPY_RESULT(dst, len) dst
23 # define MIN_PAGE_SIZE 131072
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)
35 simple_memcpy (char *dst, const char *src, size_t n)
44 builtin_memcpy (char *dst, const char *src, size_t n)
46 return __builtin_memcpy (dst, src, n);
50 typedef char *(*proto_t) (char *, const char *, size_t);
53 do_one_test (impl_t *impl, char *dst, const char *src,
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));
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);
74 hp_timing_t start __attribute ((unused));
75 hp_timing_t stop __attribute ((unused));
76 hp_timing_t best_time = ~ (hp_timing_t) 0;
79 for (i = 0; i < 32; ++i)
81 HP_TIMING_NOW (start);
82 CALL (impl, dst, src, len);
84 HP_TIMING_BEST (best_time, start, stop);
87 printf ("\t%zd", (size_t) best_time);
92 do_test (size_t align1, size_t align2, size_t len)
98 if (align1 + len >= page_size)
102 if (align2 + len >= page_size)
105 s1 = (char *) (buf1 + align1);
106 s2 = (char *) (buf2 + align2);
108 for (i = 0, j = 1; i < len; i++, j += 23)
112 printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
114 FOR_EACH_IMPL (impl, 0)
115 do_one_test (impl, s2, s1, len);
122 do_random_tests (void)
124 size_t i, j, n, align1, align2, len, size1, size2, size;
126 unsigned char *p1, *p2;
129 for (n = 0; n < ITERATIONS; n++)
133 len = getpagesize ();
142 if ((random () & 255) == 0)
146 if (size > page_size)
159 len = random () % size;
160 align1 = size1 - len - (random () & 31);
161 align2 = size2 - len - (random () & 31);
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;
181 j = align1 + len + 256;
184 for (i = 0; i < j; ++i)
185 p1[i] = random () & 255;
187 FOR_EACH_IMPL (impl, 1)
189 j = align2 + len + 256;
193 res = (unsigned char *) CALL (impl,
194 (char *) (p2 + align2),
195 (char *) (p1 + align1), len);
196 if (res != MEMCPY_RESULT (p2 + align2, len))
198 error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
199 n, impl->name, align1, align2, len, res,
200 MEMCPY_RESULT (p2 + align2, len));
203 for (i = 0; i < align2; ++i)
207 error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
208 n, impl->name, align1, align2, len);
213 for (i = align2 + len; i < j; ++i)
217 error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
218 n, impl->name, align1, align2, len);
223 if (memcmp (p1 + align1, p2 + align2, len))
225 error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
226 n, impl->name, align1, align2, len);
241 FOR_EACH_IMPL (impl, 0)
242 printf ("\t%s", impl->name);
245 for (i = 0; i < 18; ++i)
247 do_test (0, 0, 1 << i);
248 do_test (i, 0, 1 << i);
249 do_test (0, i, 1 << i);
250 do_test (i, i, 1 << i);
253 for (i = 0; i < 32; ++i)
261 for (i = 3; i < 32; ++i)
263 if ((i & (i - 1)) == 0)
265 do_test (0, 0, 16 * i);
266 do_test (i, 0, 16 * i);
267 do_test (0, i, 16 * i);
268 do_test (i, i, 16 * i);
271 do_test (0, 0, getpagesize ());
277 #include "../test-skeleton.c"