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/* $OpenBSD: endian.h,v 1.14 2005/12/13 00:35:23 millert Exp $ */
/*-
* Copyright (c) 1997 Niklas Hallqvist. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _I386_ENDIAN_H_
#define _I386_ENDIAN_H_
#ifdef __GNUC__
#if defined(_KERNEL) && !defined(I386_CPU)
#define __swap32md(x) ({ \
u_int32_t __swap32md_x = (x); \
\
__asm ("bswap %1" : "+r" (__swap32md_x)); \
__swap32md_x; \
})
#else
#define __swap32md(x) ({ \
u_int32_t __swap32md_x = (x); \
\
__asm ("rorw $8, %w1; rorl $16, %1; rorw $8, %w1" : \
"+r" (__swap32md_x)); \
__swap32md_x; \
})
#endif /* _KERNEL && !I386_CPU */
#define __swap64md(x) ({ \
u_int64_t __swap64md_x = (x); \
\
(u_int64_t)__swap32md(__swap64md_x >> 32) | \
(u_int64_t)__swap32md(__swap64md_x & 0xffffffff) << 32; \
})
#define __swap16md(x) ({ \
u_int16_t __swap16md_x = (x); \
\
__asm ("rorw $8, %w1" : "+r" (__swap16md_x)); \
__swap16md_x; \
})
/* Tell sys/endian.h we have MD variants of the swap macros. */
#define MD_SWAP
#endif /* __GNUC__ */
#define _BYTE_ORDER _LITTLE_ENDIAN
#include <sys/endian.h>
#endif /* _I386_ENDIAN_H_ */
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