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/*
* Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#ifndef _OS__OSBYTEORDERI386_H
#define _OS__OSBYTEORDERI386_H
#if !defined(__DARWIN_OS_INLINE)
# if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
# define __DARWIN_OS_INLINE static inline
# elif defined(__MWERKS__) || defined(__cplusplus)
# define __DARWIN_OS_INLINE static inline
# else
# define __DARWIN_OS_INLINE static __inline__
# endif
#endif
/* Generic byte swapping functions. */
__DARWIN_OS_INLINE
__uint16_t
_OSSwapInt16(
__uint16_t _data
)
{
return ((_data << 8) | (_data >> 8));
}
__DARWIN_OS_INLINE
__uint32_t
_OSSwapInt32(
__uint32_t _data
)
{
uint32_t tmp = _data;
__asm volatile ("EOR %1, %0, %0, ROR #16\n"
"BIC %1, %1, #0xff0000\n"
"MOV %0, %0, ROR #8\n"
"EOR %0, %0, %1, LSR #8\n"
: "=r" (_data), "=r" (tmp)
: "0" (_data), "1" (tmp));
return _data;
}
__DARWIN_OS_INLINE
__uint64_t
_OSSwapInt64(
__uint64_t _data
)
{
return (__uint64_t) _OSSwapInt32(_data & 0xffffffff) << 32 | _OSSwapInt32(_data >> 32 & 0xffffff);
}
#endif /* ! _OS__OSBYTEORDERI386_H */
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