1#ifndef _LINUX_BITOPS_H
2#define _LINUX_BITOPS_H
3#include <asm/types.h>
4
5/*
6 * Include this here because some architectures need generic_ffs/fls in
7 * scope
8 */
9#include <asm/bitops.h>
10
11static __inline__ int get_bitmask_order(unsigned int count)
12{
13	int order;
14
15	order = fls(count);
16	return order;	/* We could be slightly more clever with -1 here... */
17}
18
19static __inline__ int get_count_order(unsigned int count)
20{
21	int order;
22
23	order = fls(count) - 1;
24	if (count & (count - 1))
25		order++;
26	return order;
27}
28
29static inline unsigned long hweight_long(unsigned long w)
30{
31	return sizeof(w) == 4 ? hweight32(w) : hweight64(w);
32}
33
34/*
35 * rol32 - rotate a 32-bit value left
36 *
37 * @word: value to rotate
38 * @shift: bits to roll
39 */
40static inline __u32 rol32(__u32 word, unsigned int shift)
41{
42	return (word << shift) | (word >> (32 - shift));
43}
44
45/*
46 * ror32 - rotate a 32-bit value right
47 *
48 * @word: value to rotate
49 * @shift: bits to roll
50 */
51static inline __u32 ror32(__u32 word, unsigned int shift)
52{
53	return (word >> shift) | (word << (32 - shift));
54}
55
56static inline unsigned fls_long(unsigned long l)
57{
58	if (sizeof(l) == 4)
59		return fls(l);
60	return fls64(l);
61}
62
63#endif
64