xnu-517.11.1.tar.gz

[apple/xnu.git] / bsd / libkern / bcmp.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
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 * "License").  You may not use this file except in compliance with the
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 * http://www.apple.com/publicsource and read it before using this file.
 * 
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/*
 * Copyright (c) 1987, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
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 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
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 *    may be used to endorse or promote products derived from this software
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#warning bcmp() not optimized for ppc
#if defined(ppc)
/* HP, i386 has its own tuned version of bcmp, so should ppc! */

#if defined(LIBC_SCCS) && !defined(lint)
/* static char sccsid[] = "@(#)bcmp.c	8.1 (Berkeley) 6/4/93"; */
#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>

/*
 * bcmp -- vax cmpc3 instruction
 */
int
bcmp(b1, b2, length)
	const void *b1, *b2;
	register size_t length;
{
	register char *p1, *p2;

	if (length == 0)
		return(0);
	p1 = (char *)b1;
	p2 = (char *)b2;
	do
		if (*p1++ != *p2++)
			break;
	while (--length);
	return(length);
}

#endif /* ppc */