1/*	$NetBSD: bcmp.c,v 1.5 2009/03/19 08:39:54 he Exp $	*/
2
3/*
4 * Copyright (c) 1987, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#if defined(LIBC_SCCS) && !defined(lint)
34#if 0
35static char sccsid[] = "@(#)bcmp.c	8.1 (Berkeley) 6/4/93";
36#else
37__RCSID("$NetBSD: bcmp.c,v 1.5 2009/03/19 08:39:54 he Exp $");
38#endif
39#endif /* LIBC_SCCS and not lint */
40
41
42#if defined(_KERNEL) || defined(_STANDALONE)
43#include <lib/libkern/libkern.h>
44#if defined(_STANDALONE)
45#include <lib/libsa/stand.h>
46#endif
47#else
48#include <assert.h>
49#include <string.h>
50#endif
51
52/*
53 * bcmp -- vax cmpc3 instruction
54 */
55int
56bcmp(const void *b1, const void *b2, size_t length)
57{
58	const char *p1 = b1, *p2 = b2;
59
60	_DIAGASSERT(b1 != 0);
61	_DIAGASSERT(b2 != 0);
62
63	if (length == 0)
64		return(0);
65	do
66		if (*p1++ != *p2++)
67			break;
68	while (--length);
69	return(length);
70}
71