include/asm-sparc64/bitops.h

   1 /* $Id: bitops.h,v 1.39 2002/01/30 01:40:00 davem Exp $
   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
  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);
  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/fls64.h>
  38
  39 #ifdef __KERNEL__
  40
  41 #include <asm-generic/bitops/sched.h>
  42 #include <asm-generic/bitops/ffs.h>
  43
  44 /*
  45  * hweightN: returns the hamming weight (i.e. the number
  46  * of bits set) of a N-bit word
  47  */
  48
  49 #ifdef ULTRA_HAS_POPULATION_COUNT
  50
  51 static inline unsigned int hweight64(unsigned long w)
  52 {
  53         unsigned int res;
  54
  55         __asm__ ("popc %1,%0" : "=r" (res) : "r" (w));
  56         return res;
  57 }
  58
  59 static inline unsigned int hweight32(unsigned int w)
  60 {
  61         unsigned int res;
  62
  63         __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xffffffff));
  64         return res;
  65 }
  66
  67 static inline unsigned int hweight16(unsigned int w)
  68 {
  69         unsigned int res;
  70
  71         __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xffff));
  72         return res;
  73 }
  74
  75 static inline unsigned int hweight8(unsigned int w)
  76 {
  77         unsigned int res;
  78
  79         __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xff));
  80         return res;
  81 }
  82
  83 #else
  84
  85 #include <asm-generic/bitops/hweight.h>
  86
  87 #endif
  88 #include <asm-generic/bitops/lock.h>
  89 #endif /* __KERNEL__ */
  90
  91 #include <asm-generic/bitops/find.h>
  92
  93 #ifdef __KERNEL__
  94
  95 #include <asm-generic/bitops/ext2-non-atomic.h>
  96
  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))
 101
 102 #include <asm-generic/bitops/minix.h>
 103
 104 #endif /* __KERNEL__ */
 105
 106 #endif /* defined(_SPARC64_BITOPS_H) */