Linux kernel mirror (for testing)
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linux
1/*
2 * bitops.h: Bit string operations on the V9.
3 *
4 * Copyright 1996, 1997 David S. Miller (davem@caip.rutgers.edu)
5 */
6
7#ifndef _SPARC64_BITOPS_H
8#define _SPARC64_BITOPS_H
9
10#ifndef _LINUX_BITOPS_H
11#error only <linux/bitops.h> can be included directly
12#endif
13
14#include <linux/compiler.h>
15#include <asm/byteorder.h>
16
17extern int test_and_set_bit(unsigned long nr, volatile unsigned long *addr);
18extern int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr);
19extern int test_and_change_bit(unsigned long nr, volatile unsigned long *addr);
20extern void set_bit(unsigned long nr, volatile unsigned long *addr);
21extern void clear_bit(unsigned long nr, volatile unsigned long *addr);
22extern void change_bit(unsigned long nr, volatile unsigned long *addr);
23
24#include <asm-generic/bitops/non-atomic.h>
25
26#ifdef CONFIG_SMP
27#define smp_mb__before_clear_bit() membar_storeload_loadload()
28#define smp_mb__after_clear_bit() membar_storeload_storestore()
29#else
30#define smp_mb__before_clear_bit() barrier()
31#define smp_mb__after_clear_bit() barrier()
32#endif
33
34#include <asm-generic/bitops/ffz.h>
35#include <asm-generic/bitops/__ffs.h>
36#include <asm-generic/bitops/fls.h>
37#include <asm-generic/bitops/__fls.h>
38#include <asm-generic/bitops/fls64.h>
39
40#ifdef __KERNEL__
41
42#include <asm-generic/bitops/sched.h>
43#include <asm-generic/bitops/ffs.h>
44
45/*
46 * hweightN: returns the hamming weight (i.e. the number
47 * of bits set) of a N-bit word
48 */
49
50#ifdef ULTRA_HAS_POPULATION_COUNT
51
52static inline unsigned int hweight64(unsigned long w)
53{
54 unsigned int res;
55
56 __asm__ ("popc %1,%0" : "=r" (res) : "r" (w));
57 return res;
58}
59
60static inline unsigned int hweight32(unsigned int w)
61{
62 unsigned int res;
63
64 __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xffffffff));
65 return res;
66}
67
68static inline unsigned int hweight16(unsigned int w)
69{
70 unsigned int res;
71
72 __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xffff));
73 return res;
74}
75
76static inline unsigned int hweight8(unsigned int w)
77{
78 unsigned int res;
79
80 __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xff));
81 return res;
82}
83
84#else
85
86#include <asm-generic/bitops/hweight.h>
87
88#endif
89#include <asm-generic/bitops/lock.h>
90#endif /* __KERNEL__ */
91
92#include <asm-generic/bitops/find.h>
93
94#ifdef __KERNEL__
95
96#include <asm-generic/bitops/ext2-non-atomic.h>
97
98#define ext2_set_bit_atomic(lock,nr,addr) \
99 test_and_set_bit((nr) ^ 0x38,(unsigned long *)(addr))
100#define ext2_clear_bit_atomic(lock,nr,addr) \
101 test_and_clear_bit((nr) ^ 0x38,(unsigned long *)(addr))
102
103#include <asm-generic/bitops/minix.h>
104
105#endif /* __KERNEL__ */
106
107#endif /* defined(_SPARC64_BITOPS_H) */