1/*	$NetBSD: byte_swap_4.S,v 1.4 2005/12/11 12:24:44 christos Exp $	*/
2
3/*-
4 * Copyright (C) 1999 SHIMIZU Ryo.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <machine/asm.h>
30
31#undef _LOCORE
32#define	_LOCORE		/* XXX not really, just assembly-code source */
33#include <machine/endian.h>
34
35ENTRY(bswap32)
36#if BYTE_ORDER == LITTLE_ENDIAN
37ALTENTRY(ntohl)
38ALTENTRY(htonl)
39#endif
40	swap.b	r4,r0
41	swap.w	r0,r0
42	rts
43	 swap.b	r0,r0
44
45#if BYTE_ORDER == BIG_ENDIAN
46ENTRY(ntohl)
47ALTENTRY(htonl)
48	rts
49	 mov	r4, r0
50#endif
51