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82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
/* $NetBSD: byte_swap.h,v 1.8 2009/04/30 07:01:27 skrll Exp $ */
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/* $OpenBSD: endian.h,v 1.8 2004/04/07 18:24:19 mickey Exp $ */
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/*
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* Copyright (c) 1998-2004 Michael Shalayeff
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* 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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*
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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 OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _HPPA_BYTE_SWAP_H_
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#define _HPPA_BYTE_SWAP_H_
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#ifdef __GNUC__
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#include <sys/types.h>
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__BEGIN_DECLS
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#define __BYTE_SWAP_U32_VARIABLE __byte_swap_u32_variable
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static __inline uint32_t __byte_swap_u32_variable(uint32_t);
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static __inline uint32_t
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__byte_swap_u32_variable(uint32_t x)
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{
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register uint32_t __swap32md_x; \
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\
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__asm ("extru %1, 7,8,%%r22\n\t" \
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"shd %1,%1,8,%0\n\t" \
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"dep %0,15,8,%0\n\t" \
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"dep %%r22,31,8,%0" \
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: "=&r" (__swap32md_x) \
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: "r" (x) : "r22"); \
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return(__swap32md_x);
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}
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#if 0
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/*
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* Use generic C version because w/ asm __inline below
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* gcc inserts extra "extru r,31,16,r" to convert
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* to 16 bit entity, which produces overhead we don't need.
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* Besides, gcc does swap16 same way by itself.
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*/
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#define __swap16md(x) __swap16gen(x)
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#else
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#define __BYTE_SWAP_U16_VARIABLE __byte_swap_u16_variable
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static __inline uint16_t __byte_swap_u16_variable(uint16_t);
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static __inline uint16_t
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__byte_swap_u16_variable(uint16_t x)
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{
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register uint16_t __swap16md_x; \
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\
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__asm ("extru %1,23,8,%0\n\t" \
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"dep %1,23,8,%0" \
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: "=&r" (__swap16md_x) : "r" (x)); \
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return(__swap16md_x);
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}
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#endif
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__END_DECLS
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#endif
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#endif /* !_HPPA_BYTE_SWAP_H_ */
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