1 /*
2 * Copyright (c) 2000-2023 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_OSBYTEORDERMACHINE_H
30 #define _OS_OSBYTEORDERMACHINE_H
31
32 #if !defined(__GNUC__) || (!defined(__i386__) && !defined(__x86_64__) && !defined (__arm__) && !defined(__arm64__))
33
34 #include <stdint.h>
35
36 #if !defined(OS_INLINE)
37 # if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
38 # define OS_INLINE static inline
39 # elif defined(__MWERKS__) || defined(__cplusplus)
40 # define OS_INLINE static inline
41 # else
42 # define OS_INLINE static __inline__
43 # endif
44 #endif
45
46 /* Generic byte swapping functions. */
47
48 OS_INLINE
49 uint16_t
_OSSwapInt16(uint16_t data)50 _OSSwapInt16(
51 uint16_t data
52 )
53 {
54 return OSSwapConstInt16(data);
55 }
56
57 OS_INLINE
58 uint32_t
_OSSwapInt32(uint32_t data)59 _OSSwapInt32(
60 uint32_t data
61 )
62 {
63 return OSSwapConstInt32(data);
64 }
65
66 OS_INLINE
67 uint64_t
_OSSwapInt64(uint64_t data)68 _OSSwapInt64(
69 uint64_t data
70 )
71 {
72 return OSSwapConstInt64(data);
73 }
74
75 /* Functions for byte reversed loads. */
76
77 OS_INLINE
78 uint16_t
OSReadSwapInt16(const volatile void * base,uintptr_t byteOffset)79 OSReadSwapInt16(
80 const volatile void * base,
81 uintptr_t byteOffset
82 )
83 {
84 uint16_t data = *(volatile uint16_t *)((uintptr_t)base + byteOffset);
85 return _OSSwapInt16(data);
86 }
87
88 OS_INLINE
89 uint32_t
OSReadSwapInt32(const volatile void * base,uintptr_t byteOffset)90 OSReadSwapInt32(
91 const volatile void * base,
92 uintptr_t byteOffset
93 )
94 {
95 uint32_t data = *(volatile uint32_t *)((uintptr_t)base + byteOffset);
96 return _OSSwapInt32(data);
97 }
98
99 OS_INLINE
100 uint64_t
OSReadSwapInt64(const volatile void * base,uintptr_t byteOffset)101 OSReadSwapInt64(
102 const volatile void * base,
103 uintptr_t byteOffset
104 )
105 {
106 uint64_t data = *(volatile uint64_t *)((uintptr_t)base + byteOffset);
107 return _OSSwapInt64(data);
108 }
109
110 /* Functions for byte reversed stores. */
111
112 OS_INLINE
113 void
OSWriteSwapInt16(volatile void * base,uintptr_t byteOffset,uint16_t data)114 OSWriteSwapInt16(
115 volatile void * base,
116 uintptr_t byteOffset,
117 uint16_t data
118 )
119 {
120 *(volatile uint16_t *)((uintptr_t)base + byteOffset) = _OSSwapInt16(data);
121 }
122
123 OS_INLINE
124 void
OSWriteSwapInt32(volatile void * base,uintptr_t byteOffset,uint32_t data)125 OSWriteSwapInt32(
126 volatile void * base,
127 uintptr_t byteOffset,
128 uint32_t data
129 )
130 {
131 *(volatile uint32_t *)((uintptr_t)base + byteOffset) = _OSSwapInt32(data);
132 }
133
134 OS_INLINE
135 void
OSWriteSwapInt64(volatile void * base,uintptr_t byteOffset,uint64_t data)136 OSWriteSwapInt64(
137 volatile void * base,
138 uintptr_t byteOffset,
139 uint64_t data
140 )
141 {
142 *(volatile uint64_t *)((uintptr_t)base + byteOffset) = _OSSwapInt64(data);
143 }
144
145 #endif /* !defined(__GNUC__) || (!defined(__i386__) && !defined(__x86_64__) && !defined (__arm__) && !defined(__arm64__)) */
146
147 #endif /* ! _OS_OSBYTEORDERMACHINE_H */
148