1#ifndef _TOOLS_LINUX_BITOPS_H_
2#define _TOOLS_LINUX_BITOPS_H_
3
4#include <asm/types.h>
5#include <linux/kernel.h>
6#include <linux/compiler.h>
7
8#ifndef __WORDSIZE
9#define __WORDSIZE (__SIZEOF_LONG__ * 8)
10#endif
11
12#define BITS_PER_LONG __WORDSIZE
13
14#define BIT_MASK(nr) (1UL << ((nr) % BITS_PER_LONG))
15#define BIT_WORD(nr) ((nr) / BITS_PER_LONG)
16#define BITS_PER_BYTE 8
17#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
18#define BITS_TO_U64(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(u64))
19#define BITS_TO_U32(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(u32))
20#define BITS_TO_BYTES(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE)
21
22extern unsigned int __sw_hweight8(unsigned int w);
23extern unsigned int __sw_hweight16(unsigned int w);
24extern unsigned int __sw_hweight32(unsigned int w);
25extern unsigned long __sw_hweight64(__u64 w);
26
27
28
29
30
31
32
33#include <asm-generic/bitops.h>
34
35#define for_each_set_bit(bit, addr, size) \
36 for ((bit) = find_first_bit((addr), (size)); \
37 (bit) < (size); \
38 (bit) = find_next_bit((addr), (size), (bit) + 1))
39
40
41#define for_each_set_bit_from(bit, addr, size) \
42 for ((bit) = find_next_bit((addr), (size), (bit)); \
43 (bit) < (size); \
44 (bit) = find_next_bit((addr), (size), (bit) + 1))
45
46static inline unsigned long hweight_long(unsigned long w)
47{
48 return sizeof(w) == 4 ? hweight32(w) : hweight64(w);
49}
50
51static inline unsigned fls_long(unsigned long l)
52{
53 if (sizeof(l) == 4)
54 return fls(l);
55 return fls64(l);
56}
57
58#endif
59