105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
/*
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* Copyright (c) 2006-2012 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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#ifndef _OS__OSBYTEORDERI386_H
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#define _OS__OSBYTEORDERI386_H
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#if !defined(__DARWIN_OS_INLINE)
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# if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
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# define __DARWIN_OS_INLINE static inline
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# elif defined(__MWERKS__) || defined(__cplusplus)
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# define __DARWIN_OS_INLINE static inline
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# else
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# define __DARWIN_OS_INLINE static __inline__
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# endif
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#endif
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/* Generic byte swapping functions. */
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__DARWIN_OS_INLINE
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__uint16_t
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_OSSwapInt16(
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__uint16_t _data
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)
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{
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return (__uint16_t)((_data << 8) | (_data >> 8));
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}
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__DARWIN_OS_INLINE
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__uint32_t
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_OSSwapInt32(
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__uint32_t _data
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)
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{
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#if defined(__llvm__)
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return __builtin_bswap32(_data);
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#else
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__asm__ ("bswap %0" : "+r" (_data));
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return _data;
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#endif
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}
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#if defined(__llvm__)
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__DARWIN_OS_INLINE
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__uint64_t
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_OSSwapInt64(
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__uint64_t _data
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)
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{
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return __builtin_bswap64(_data);
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}
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#elif defined(__i386__)
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__DARWIN_OS_INLINE
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__uint64_t
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_OSSwapInt64(
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__uint64_t _data
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)
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{
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__asm__ ("bswap %%eax\n\t"
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"bswap %%edx\n\t"
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"xchgl %%eax, %%edx"
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: "+A" (_data));
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return _data;
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}
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#elif defined(__x86_64__)
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__DARWIN_OS_INLINE
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__uint64_t
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_OSSwapInt64(
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__uint64_t _data
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)
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{
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__asm__ ("bswap %0" : "+r" (_data));
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return _data;
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}
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#else
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#error Unknown architecture
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#endif
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#endif /* ! _OS__OSBYTEORDERI386_H */
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