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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
#ifndef APOS_BITS_H
#define APOS_BITS_H
/**
* @file bits.h
* Bit manipulations.
*/
#include <apos/types.h>
#include <apos/builtin.h>
#define is_set(x, y) ((x) & (y))
#define set_bit(x, y) ((x) |= (y))
#define clear_bit(x, y) ((x) &= ~(y))
#define is_nset(x, y) (is_set((x), 1UL << (y)))
#define set_nbit(x, y) (set_bit((x), 1UL << (y)))
#define clear_nbit(x, y) (clear_bit((x), 1UL << (y)))
static inline bool bitmap_is_set(void *bmap, size_t n)
{
uint8_t *bitmap = bmap;
size_t i = n / 8;
size_t r = n - (i * 8);
return is_nset(bitmap[i], r);
}
static inline void bitmap_set(void *bmap, size_t n)
{
uint8_t *bitmap = bmap;
size_t i = n / 8;
size_t r = n - (i * 8);
set_nbit(bitmap[i], r);
}
static inline void bitmap_clear(void *bmap, size_t n)
{
uint8_t *bitmap = bmap;
size_t i = n / 8;
size_t r = n - (i * 8);
clear_nbit(bitmap[i], r);
}
uint16_t __bswap16(uint16_t u);
uint32_t __bswap32(uint32_t u);
uint64_t __bswap64(uint64_t u);
#if __has_builtin(__builtin_bswap16)
#define __bswap16(x) __builtin_bswap16(x)
#endif
#if __has_builtin(__builtin_bswap32)
#define __bswap32(x) __builtin_bswap32(x)
#endif
#if __has_builtin(__builtin_bswap64)
#define __bswap64(x) __builtin_bswap64(x)
#endif
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
#define be16_to_cpu(x) __bswap16(x)
#define be32_to_cpu(x) __bswap32(x)
#define be64_to_cpu(x) __bswap64(x)
#define cpu_to_be16(x) __bswap16(x)
#define cpu_to_be32(x) __bswap32(x)
#define cpu_to_be64(x) __bswap64(x)
#define le16_to_cpu(x) (x)
#define le32_to_cpu(x) (x)
#define le64_to_cpu(x) (x)
#define cpu_to_le16(x) (x)
#define cpu_to_le32(x) (x)
#define cpu_to_le64(x) (x)
#else
#define be16_to_cpu(x) (x)
#define be32_to_cpu(x) (x)
#define be64_to_cpu(x) (x)
#define cpu_to_be16(x) (x)
#define cpu_to_be32(x) (x)
#define cpu_to_be64(x) (x)
#define le16_to_cpu(x) __bswap16(x)
#define le32_to_cpu(x) __bswap32(x)
#define le64_to_cpu(x) __bswap64(x)
#define cpu_to_le16(x) __bswap16(x)
#define cpu_to_le32(x) __bswap32(x)
#define cpu_to_le64(x) __bswap64(x)
#endif
#endif /* APOS_BITS_H */
|
