| 1 | /*␊ |
| 2 | * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.␊ |
| 3 | *␊ |
| 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@␊ |
| 5 | * ␊ |
| 6 | * This file contains Original Code and/or Modifications of Original Code␊ |
| 7 | * as defined in and that are subject to the Apple Public Source License␊ |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in␊ |
| 9 | * compliance with the License. The rights granted to you under the License␊ |
| 10 | * may not be used to create, or enable the creation or redistribution of,␊ |
| 11 | * unlawful or unlicensed copies of an Apple operating system, or to␊ |
| 12 | * circumvent, violate, or enable the circumvention or violation of, any␊ |
| 13 | * terms of an Apple operating system software license agreement.␊ |
| 14 | * ␊ |
| 15 | * Please obtain a copy of the License at␊ |
| 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file.␊ |
| 17 | * ␊ |
| 18 | * The Original Code and all software distributed under the License are␊ |
| 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
| 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
| 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.␊ |
| 23 | * Please see the License for the specific language governing rights and␊ |
| 24 | * limitations under the License.␊ |
| 25 | * ␊ |
| 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@␊ |
| 27 | */␊ |
| 28 | ␊ |
| 29 | #ifndef _OS__OSBYTEORDERI386_H␊ |
| 30 | #define _OS__OSBYTEORDERI386_H␊ |
| 31 | ␊ |
| 32 | #if !defined(__DARWIN_OS_INLINE)␊ |
| 33 | # if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L␊ |
| 34 | # define __DARWIN_OS_INLINE static inline␊ |
| 35 | # elif defined(__MWERKS__) || defined(__cplusplus)␊ |
| 36 | # define __DARWIN_OS_INLINE static inline␊ |
| 37 | # else␊ |
| 38 | # define __DARWIN_OS_INLINE static __inline__␊ |
| 39 | # endif␊ |
| 40 | #endif␊ |
| 41 | ␊ |
| 42 | /* Generic byte swapping functions. */␊ |
| 43 | ␊ |
| 44 | __DARWIN_OS_INLINE␊ |
| 45 | __uint16_t␊ |
| 46 | _OSSwapInt16(␊ |
| 47 | __uint16_t _data␊ |
| 48 | )␊ |
| 49 | {␊ |
| 50 | return ((_data << 8) | (_data >> 8));␊ |
| 51 | }␊ |
| 52 | ␊ |
| 53 | __DARWIN_OS_INLINE␊ |
| 54 | __uint32_t␊ |
| 55 | _OSSwapInt32(␊ |
| 56 | __uint32_t _data␊ |
| 57 | )␊ |
| 58 | {␊ |
| 59 | #if defined(__llvm__)␊ |
| 60 | return __builtin_bswap32(_data);␊ |
| 61 | #else␊ |
| 62 | __asm__ ("bswap %0" : "+r" (_data));␊ |
| 63 | return _data;␊ |
| 64 | #endif␊ |
| 65 | }␊ |
| 66 | ␊ |
| 67 | #if defined(__llvm__)␊ |
| 68 | __DARWIN_OS_INLINE␊ |
| 69 | __uint64_t␊ |
| 70 | _OSSwapInt64(␊ |
| 71 | __uint64_t _data␊ |
| 72 | )␊ |
| 73 | {␊ |
| 74 | return __builtin_bswap64(_data);␊ |
| 75 | }␊ |
| 76 | ␊ |
| 77 | #elif defined(__i386__)␊ |
| 78 | __DARWIN_OS_INLINE␊ |
| 79 | __uint64_t␊ |
| 80 | _OSSwapInt64(␊ |
| 81 | __uint64_t _data␊ |
| 82 | )␊ |
| 83 | {␊ |
| 84 | __asm__ ("bswap %%eax\n\t"␊ |
| 85 | "bswap %%edx\n\t" ␊ |
| 86 | "xchgl %%eax, %%edx"␊ |
| 87 | : "+A" (_data));␊ |
| 88 | return _data;␊ |
| 89 | }␊ |
| 90 | #elif defined(__x86_64__)␊ |
| 91 | __DARWIN_OS_INLINE␊ |
| 92 | __uint64_t␊ |
| 93 | _OSSwapInt64(␊ |
| 94 | __uint64_t _data␊ |
| 95 | )␊ |
| 96 | {␊ |
| 97 | __asm__ ("bswap %0" : "+r" (_data));␊ |
| 98 | return _data;␊ |
| 99 | }␊ |
| 100 | #else␊ |
| 101 | #error Unknown architecture␊ |
| 102 | #endif␊ |
| 103 | ␊ |
| 104 | #endif /* ! _OS__OSBYTEORDERI386_H */␊ |
| 105 | |
