1 /* $Id: bitops.h,v 1.39 2002/01/30 01:40:00 davem Exp $
2 * bitops.h: Bit string operations on the V9.
4 * Copyright 1996, 1997 David S. Miller (davem@caip.rutgers.edu)
7 #ifndef _SPARC64_BITOPS_H
8 #define _SPARC64_BITOPS_H
10 #ifndef _LINUX_BITOPS_H
11 #error only <linux/bitops.h> can be included directly
14 #include <linux/compiler.h>
15 #include <asm/byteorder.h>
17 extern int test_and_set_bit(unsigned long nr, volatile unsigned long *addr);
18 extern int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr);
19 extern int test_and_change_bit(unsigned long nr, volatile unsigned long *addr);
20 extern void set_bit(unsigned long nr, volatile unsigned long *addr);
21 extern void clear_bit(unsigned long nr, volatile unsigned long *addr);
22 extern void change_bit(unsigned long nr, volatile unsigned long *addr);
24 #include <asm-generic/bitops/non-atomic.h>
27 #define smp_mb__before_clear_bit() membar_storeload_loadload()
28 #define smp_mb__after_clear_bit() membar_storeload_storestore()
30 #define smp_mb__before_clear_bit() barrier()
31 #define smp_mb__after_clear_bit() barrier()
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/fls64.h>
41 #include <asm-generic/bitops/sched.h>
42 #include <asm-generic/bitops/ffs.h>
45 * hweightN: returns the hamming weight (i.e. the number
46 * of bits set) of a N-bit word
49 #ifdef ULTRA_HAS_POPULATION_COUNT
51 static inline unsigned int hweight64(unsigned long w)
55 __asm__ ("popc %1,%0" : "=r" (res) : "r" (w));
59 static inline unsigned int hweight32(unsigned int w)
63 __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xffffffff));
67 static inline unsigned int hweight16(unsigned int w)
71 __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xffff));
75 static inline unsigned int hweight8(unsigned int w)
79 __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xff));
85 #include <asm-generic/bitops/hweight.h>
88 #include <asm-generic/bitops/lock.h>
89 #endif /* __KERNEL__ */
91 #include <asm-generic/bitops/find.h>
95 #include <asm-generic/bitops/ext2-non-atomic.h>
97 #define ext2_set_bit_atomic(lock,nr,addr) \
98 test_and_set_bit((nr) ^ 0x38,(unsigned long *)(addr))
99 #define ext2_clear_bit_atomic(lock,nr,addr) \
100 test_and_clear_bit((nr) ^ 0x38,(unsigned long *)(addr))
102 #include <asm-generic/bitops/minix.h>
104 #endif /* __KERNEL__ */
106 #endif /* defined(_SPARC64_BITOPS_H) */