Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_UNALIGNED_GENERIC_H
3#define _LINUX_UNALIGNED_GENERIC_H
4
5#include <linux/types.h>
6
7/*
8 * Cause a link-time error if we try an unaligned access other than
9 * 1,2,4 or 8 bytes long
10 */
11extern void __bad_unaligned_access_size(void);
12
13#define __get_unaligned_le(ptr) ((__force typeof(*(ptr)))({ \
14 __builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
15 __builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_le16((ptr)), \
16 __builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_le32((ptr)), \
17 __builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_le64((ptr)), \
18 __bad_unaligned_access_size())))); \
19 }))
20
21#define __get_unaligned_be(ptr) ((__force typeof(*(ptr)))({ \
22 __builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
23 __builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_be16((ptr)), \
24 __builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_be32((ptr)), \
25 __builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_be64((ptr)), \
26 __bad_unaligned_access_size())))); \
27 }))
28
29#define __put_unaligned_le(val, ptr) ({ \
30 void *__gu_p = (ptr); \
31 switch (sizeof(*(ptr))) { \
32 case 1: \
33 *(u8 *)__gu_p = (__force u8)(val); \
34 break; \
35 case 2: \
36 put_unaligned_le16((__force u16)(val), __gu_p); \
37 break; \
38 case 4: \
39 put_unaligned_le32((__force u32)(val), __gu_p); \
40 break; \
41 case 8: \
42 put_unaligned_le64((__force u64)(val), __gu_p); \
43 break; \
44 default: \
45 __bad_unaligned_access_size(); \
46 break; \
47 } \
48 (void)0; })
49
50#define __put_unaligned_be(val, ptr) ({ \
51 void *__gu_p = (ptr); \
52 switch (sizeof(*(ptr))) { \
53 case 1: \
54 *(u8 *)__gu_p = (__force u8)(val); \
55 break; \
56 case 2: \
57 put_unaligned_be16((__force u16)(val), __gu_p); \
58 break; \
59 case 4: \
60 put_unaligned_be32((__force u32)(val), __gu_p); \
61 break; \
62 case 8: \
63 put_unaligned_be64((__force u64)(val), __gu_p); \
64 break; \
65 default: \
66 __bad_unaligned_access_size(); \
67 break; \
68 } \
69 (void)0; })
70
71static inline u32 __get_unaligned_be24(const u8 *p)
72{
73 return p[0] << 16 | p[1] << 8 | p[2];
74}
75
76static inline u32 get_unaligned_be24(const void *p)
77{
78 return __get_unaligned_be24(p);
79}
80
81static inline u32 __get_unaligned_le24(const u8 *p)
82{
83 return p[0] | p[1] << 8 | p[2] << 16;
84}
85
86static inline u32 get_unaligned_le24(const void *p)
87{
88 return __get_unaligned_le24(p);
89}
90
91static inline void __put_unaligned_be24(const u32 val, u8 *p)
92{
93 *p++ = val >> 16;
94 *p++ = val >> 8;
95 *p++ = val;
96}
97
98static inline void put_unaligned_be24(const u32 val, void *p)
99{
100 __put_unaligned_be24(val, p);
101}
102
103static inline void __put_unaligned_le24(const u32 val, u8 *p)
104{
105 *p++ = val;
106 *p++ = val >> 8;
107 *p++ = val >> 16;
108}
109
110static inline void put_unaligned_le24(const u32 val, void *p)
111{
112 __put_unaligned_le24(val, p);
113}
114
115#endif /* _LINUX_UNALIGNED_GENERIC_H */