Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_GENERIC_BITOPS_LE_H_
3#define _ASM_GENERIC_BITOPS_LE_H_
4
5#include <asm-generic/bitops/find.h>
6#include <asm/types.h>
7#include <asm/byteorder.h>
8#include <linux/swab.h>
9
10#if defined(__LITTLE_ENDIAN)
11
12#define BITOP_LE_SWIZZLE 0
13
14static inline unsigned long find_next_zero_bit_le(const void *addr,
15 unsigned long size, unsigned long offset)
16{
17 return find_next_zero_bit(addr, size, offset);
18}
19
20static inline unsigned long find_next_bit_le(const void *addr,
21 unsigned long size, unsigned long offset)
22{
23 return find_next_bit(addr, size, offset);
24}
25
26static inline unsigned long find_first_zero_bit_le(const void *addr,
27 unsigned long size)
28{
29 return find_first_zero_bit(addr, size);
30}
31
32#elif defined(__BIG_ENDIAN)
33
34#define BITOP_LE_SWIZZLE ((BITS_PER_LONG-1) & ~0x7)
35
36#ifndef find_next_zero_bit_le
37static inline
38unsigned long find_next_zero_bit_le(const void *addr, unsigned
39 long size, unsigned long offset)
40{
41 if (small_const_nbits(size)) {
42 unsigned long val = *(const unsigned long *)addr;
43
44 if (unlikely(offset >= size))
45 return size;
46
47 val = swab(val) | ~GENMASK(size - 1, offset);
48 return val == ~0UL ? size : ffz(val);
49 }
50
51 return _find_next_bit(addr, NULL, size, offset, ~0UL, 1);
52}
53#endif
54
55#ifndef find_next_bit_le
56static inline
57unsigned long find_next_bit_le(const void *addr, unsigned
58 long size, unsigned long offset)
59{
60 if (small_const_nbits(size)) {
61 unsigned long val = *(const unsigned long *)addr;
62
63 if (unlikely(offset >= size))
64 return size;
65
66 val = swab(val) & GENMASK(size - 1, offset);
67 return val ? __ffs(val) : size;
68 }
69
70 return _find_next_bit(addr, NULL, size, offset, 0UL, 1);
71}
72#endif
73
74#ifndef find_first_zero_bit_le
75#define find_first_zero_bit_le(addr, size) \
76 find_next_zero_bit_le((addr), (size), 0)
77#endif
78
79#else
80#error "Please fix <asm/byteorder.h>"
81#endif
82
83static inline int test_bit_le(int nr, const void *addr)
84{
85 return test_bit(nr ^ BITOP_LE_SWIZZLE, addr);
86}
87
88static inline void set_bit_le(int nr, void *addr)
89{
90 set_bit(nr ^ BITOP_LE_SWIZZLE, addr);
91}
92
93static inline void clear_bit_le(int nr, void *addr)
94{
95 clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);
96}
97
98static inline void __set_bit_le(int nr, void *addr)
99{
100 __set_bit(nr ^ BITOP_LE_SWIZZLE, addr);
101}
102
103static inline void __clear_bit_le(int nr, void *addr)
104{
105 __clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);
106}
107
108static inline int test_and_set_bit_le(int nr, void *addr)
109{
110 return test_and_set_bit(nr ^ BITOP_LE_SWIZZLE, addr);
111}
112
113static inline int test_and_clear_bit_le(int nr, void *addr)
114{
115 return test_and_clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);
116}
117
118static inline int __test_and_set_bit_le(int nr, void *addr)
119{
120 return __test_and_set_bit(nr ^ BITOP_LE_SWIZZLE, addr);
121}
122
123static inline int __test_and_clear_bit_le(int nr, void *addr)
124{
125 return __test_and_clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);
126}
127
128#endif /* _ASM_GENERIC_BITOPS_LE_H_ */