blob: 62deadc709cdbf25f8d498a9ecd9dc80fd21e136 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
#ifndef BITOPS_H
#define BITOPS_H
#include <stdint.h>
/*
* Byte swab macros (based on linux/byteorder/swab.h)
*/
#define swab16(x) \
((uint16_t)( \
(((uint16_t)(x) & (uint16_t)0x00ffU) << 8) | \
(((uint16_t)(x) & (uint16_t)0xff00U) >> 8) ))
#define swab32(x) \
((uint32_t)( \
(((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) | \
(((uint32_t)(x) & (uint32_t)0x0000ff00UL) << 8) | \
(((uint32_t)(x) & (uint32_t)0x00ff0000UL) >> 8) | \
(((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24) ))
#define swab64(x) \
((uint64_t)( \
(uint64_t)(((uint64_t)(x) & (uint64_t)0x00000000000000ffULL) << 56) | \
(uint64_t)(((uint64_t)(x) & (uint64_t)0x000000000000ff00ULL) << 40) | \
(uint64_t)(((uint64_t)(x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \
(uint64_t)(((uint64_t)(x) & (uint64_t)0x00000000ff000000ULL) << 8) | \
(uint64_t)(((uint64_t)(x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \
(uint64_t)(((uint64_t)(x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
(uint64_t)(((uint64_t)(x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
(uint64_t)(((uint64_t)(x) & (uint64_t)0xff00000000000000ULL) >> 56) ))
#ifdef WORDS_BIGENDIAN
#define cpu_to_le16(x) swab16(x)
#define cpu_to_le32(x) swab32(x)
#define cpu_to_le64(x) swab64(x)
#define cpu_to_be16(x) (x)
#define cpu_to_be32(x) (x)
#define cpu_to_be64(x) (x)
#define le16_to_cpu(x) swab16(x)
#define le32_to_cpu(x) swab32(x)
#define le64_to_cpu(x) swab64(x)
#define be16_to_cpu(x) (x)
#define be32_to_cpu(x) (x)
#define be64_to_cpu(x) (x)
#else /* !WORDS_BIGENDIAN */
#define cpu_to_le16(x) (x)
#define cpu_to_le32(x) (x)
#define cpu_to_le64(x) (x)
#define cpu_to_be16(x) swab16(x)
#define cpu_to_be32(x) swab32(x)
#define cpu_to_be64(x) swab64(x)
#define le16_to_cpu(x) (x)
#define le32_to_cpu(x) (x)
#define le64_to_cpu(x) (x)
#define be16_to_cpu(x) swab16(x)
#define be32_to_cpu(x) swab32(x)
#define be64_to_cpu(x) swab64(x)
#endif /* !WORDS_BIGENDIAN */
#endif /* BITOPS_H */
|
