4fa35d8ae8
Previously we'd been relying on getting the machine-specific <endian.h> instead of the top-level <endian.h>, and <sys/endian.h> was basically broken. Now, with this patch and the previous patch we should have <endian.h> and <sys/endian.h> behaving the same. This is basically how NetBSD's endian.h works, and was probably how ours was originally intended to work. Bug: http://code.google.com/p/android/issues/detail?id=39824 Change-Id: I71de5a507e633de166013a658b5764df9e1aa09c
72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/* $OpenBSD: endian.h,v 1.14 2005/12/13 00:35:23 millert Exp $ */
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/*-
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* Copyright (c) 1997 Niklas Hallqvist. 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 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 OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _I386_ENDIAN_H_
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#define _I386_ENDIAN_H_
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#ifdef __GNUC__
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#if defined(_KERNEL) && !defined(I386_CPU)
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#define __swap32md(x) ({ \
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uint32_t __swap32md_x = (x); \
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\
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__asm ("bswap %1" : "+r" (__swap32md_x)); \
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__swap32md_x; \
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})
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#else
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#define __swap32md(x) ({ \
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uint32_t __swap32md_x = (x); \
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\
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__asm ("rorw $8, %w1; rorl $16, %1; rorw $8, %w1" : \
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"+r" (__swap32md_x)); \
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__swap32md_x; \
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})
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#endif /* _KERNEL && !I386_CPU */
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#define __swap64md(x) ({ \
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uint64_t __swap64md_x = (x); \
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\
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(uint64_t)__swap32md(__swap64md_x >> 32) | \
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(uint64_t)__swap32md(__swap64md_x & 0xffffffff) << 32; \
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})
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#define __swap16md(x) ({ \
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uint16_t __swap16md_x = (x); \
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\
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__asm ("rorw $8, %w1" : "+r" (__swap16md_x)); \
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__swap16md_x; \
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})
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/* Tell sys/endian.h we have MD variants of the swap macros. */
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#define MD_SWAP
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#endif /* __GNUC__ */
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#define _BYTE_ORDER _LITTLE_ENDIAN
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#include <sys/types.h>
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#include <sys/endian.h>
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#endif /* _I386_ENDIAN_H_ */
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