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/* $OpenBSD: endian.h,v 1.8 2004/04/07 18:24:19 mickey Exp $ */
/*
* Copyright (c) 1998-2004 Michael Shalayeff
* 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 OR HIS RELATIVES 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 MIND, 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 _MACHINE_ENDIAN_H_
#define _MACHINE_ENDIAN_H_
#ifdef __GNUC__
#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 __swap32md(x) ({ \
register u_int32_t __swap32md_x; \
\
__asm ("extru %1, 7,8,%%r19\n\t" \
"shd %1,%1,8,%0\n\t" \
"dep %0,15,8,%0\n\t" \
"dep %%r19,31,8,%0" \
: "=&r" (__swap32md_x) \
: "r" (x) : "r19"); \
__swap32md_x; \
})
#if 1
/*
* Use generic C version because w/ asm inline below
* gcc inserts extra "extru r,31,16,r" to convert
* to 16 bit entity, which produces overhead we don't need.
* Besides, gcc does swap16 same way by itself.
*/
#define __swap16md(x) __swap16gen(x)
#else
#define __swap16md(x) ({ \
register u_int16_t __swap16md_x; \
\
__asm ("extru %1,23,8,%0\n\t" \
"dep %1,23,8,%0" \
: "=&r" (__swap16md_x) : "r" (x)); \
__swap16md_x; \
})
#endif
#define __swap64md(x) ({ \
u_int64_t __swap64md_x = (x); \
\
(u_int64_t)__swap32md(__swap64md_x >> 32) | \
(u_int64_t)__swap32md(__swap64md_x & 0xffffffff) << 32; \
})
/* Tell sys/endian.h we have MD variants of the swap macros. */
#define MD_SWAP
#endif /* __GNUC__ */
#define BYTE_ORDER BIG_ENDIAN
#include <sys/endian.h>
#define __STRICT_ALIGNMENT
#endif /* !_MACHINE_ENDIAN_H_ */
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