51 lines
1.8 KiB
ArmAsm
51 lines
1.8 KiB
ArmAsm
/* $NetBSD: byte_swap_4.S,v 1.5 2006/04/14 09:23:01 nonaka Exp $ */
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/*-
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* Copyright (C) 1999 SHIMIZU Ryo. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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#undef _LOCORE
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#define _LOCORE /* XXX not really, just assembly-code source */
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#include <machine/endian.h>
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ENTRY(bswap32)
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#if BYTE_ORDER == LITTLE_ENDIAN
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ALTENTRY(ntohl)
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ALTENTRY(htonl)
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#endif
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swap.b r4,r0
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swap.w r0,r0
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rts
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swap.b r0,r0
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#if BYTE_ORDER == BIG_ENDIAN
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ENTRY(ntohl)
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ALTENTRY(htonl)
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rts
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mov r4, r0
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#endif
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