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 | |