release/src-rt-6.x.4708/linux/linux-2.6.36/tools/perf/util/include/linux/bitops.h

   1 #ifndef _PERF_LINUX_BITOPS_H_
   2 #define _PERF_LINUX_BITOPS_H_
   3
   4 #include <linux/kernel.h>
   5 #include <asm/hweight.h>
   6
   7 #define BITS_PER_LONG __WORDSIZE
   8 #define BITS_PER_BYTE           8
   9 #define BITS_TO_LONGS(nr)       DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
  10
  11 static inline void set_bit(int nr, unsigned long *addr)
  12 {
  13         addr[nr / BITS_PER_LONG] |= 1UL << (nr % BITS_PER_LONG);
  14 }
  15
  16 static __always_inline int test_bit(unsigned int nr, const unsigned long *addr)
  17 {
  18         return ((1UL << (nr % BITS_PER_LONG)) &
  19                 (((unsigned long *)addr)[nr / BITS_PER_LONG])) != 0;
  20 }
  21
  22 static inline unsigned long hweight_long(unsigned long w)
  23 {
  24         return sizeof(w) == 4 ? hweight32(w) : hweight64(w);
  25 }
  26
  27 #endif