byte_swap.h revision 1.6 
11.6Smrg/*	$NetBSD: byte_swap.h,v 1.6 2008/10/26 00:08:15 mrg Exp $	*/
21.1Sfvdl
31.1Sfvdl/*-
41.1Sfvdl * Copyright (c) 1998 The NetBSD Foundation, Inc.
51.1Sfvdl * All rights reserved.
61.1Sfvdl *
71.1Sfvdl * This code is derived from software contributed to The NetBSD Foundation
81.1Sfvdl * by Charles M. Hannum.
91.1Sfvdl *
101.1Sfvdl * Redistribution and use in source and binary forms, with or without
111.1Sfvdl * modification, are permitted provided that the following conditions
121.1Sfvdl * are met:
131.1Sfvdl * 1. Redistributions of source code must retain the above copyright
141.1Sfvdl *    notice, this list of conditions and the following disclaimer.
151.1Sfvdl * 2. Redistributions in binary form must reproduce the above copyright
161.1Sfvdl *    notice, this list of conditions and the following disclaimer in the
171.1Sfvdl *    documentation and/or other materials provided with the distribution.
181.1Sfvdl *
191.1Sfvdl * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
201.1Sfvdl * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
211.1Sfvdl * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
221.1Sfvdl * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
231.1Sfvdl * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
241.1Sfvdl * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
251.1Sfvdl * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
261.1Sfvdl * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
271.1Sfvdl * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
281.1Sfvdl * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
291.1Sfvdl * POSSIBILITY OF SUCH DAMAGE.
301.1Sfvdl */
311.1Sfvdl
321.1Sfvdl/*
331.1Sfvdl * Copy of the i386 version. 64 bit versions may be added later.
341.1Sfvdl */
351.1Sfvdl
361.1Sfvdl#ifndef _AMD64_BYTE_SWAP_H_
371.1Sfvdl#define	_AMD64_BYTE_SWAP_H_
381.1Sfvdl
391.6Smrg#ifdef __x86_64__
401.6Smrg
411.4Sdsl#ifdef  __GNUC__
421.1Sfvdl#include <sys/types.h>
431.4Sdsl__BEGIN_DECLS
441.1Sfvdl
451.4Sdsl#define	__BYTE_SWAP_U32_VARIABLE __byte_swap_u32_variable
461.4Sdslstatic __inline uint32_t __byte_swap_u32_variable(uint32_t);
471.4Sdslstatic __inline uint32_t
481.4Sdsl__byte_swap_u32_variable(uint32_t x)
491.1Sfvdl{
501.2Sperry	__asm volatile ( "bswap %1" : "=r" (x) : "0" (x));
511.1Sfvdl	return (x);
521.1Sfvdl}
531.1Sfvdl
541.4Sdsl#define	__BYTE_SWAP_U16_VARIABLE __byte_swap_u16_variable
551.4Sdslstatic __inline uint16_t __byte_swap_u16_variable(uint16_t);
561.4Sdslstatic __inline uint16_t
571.4Sdsl__byte_swap_u16_variable(uint16_t x)
581.1Sfvdl{
591.2Sperry	__asm volatile ("rorw $8, %w1" : "=r" (x) : "0" (x));
601.1Sfvdl	return (x);
611.1Sfvdl}
621.1Sfvdl
631.4Sdsl__END_DECLS
641.4Sdsl#endif
651.1Sfvdl
661.6Smrg#else	/*	__x86_64__	*/
671.6Smrg
681.6Smrg#include <i386/byte_swap.h>
691.6Smrg
701.6Smrg#endif	/*	__x86_64__	*/
711.6Smrg
721.1Sfvdl#endif /* !_AMD64_BYTE_SWAP_H_ */
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