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Viewing changes to tools/perf/util/include/linux/bitops.h

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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tools/perf/util/include/linux/bitops.h
 
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#ifndef _PERF_LINUX_BITOPS_H_
 
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#define _PERF_LINUX_BITOPS_H_
 
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#include <linux/kernel.h>
 
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#include <linux/compiler.h>
 
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#include <asm/hweight.h>
 
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#define BITS_PER_LONG __WORDSIZE
 
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#define BITS_PER_BYTE           8
 
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#define BITS_TO_LONGS(nr)       DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
 
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static inline void set_bit(int nr, unsigned long *addr)
 
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{
 
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        addr[nr / BITS_PER_LONG] |= 1UL << (nr % BITS_PER_LONG);
 
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}
 
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static inline void clear_bit(int nr, unsigned long *addr)
 
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{
 
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        addr[nr / BITS_PER_LONG] &= ~(1UL << (nr % BITS_PER_LONG));
 
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}
 
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static __always_inline int test_bit(unsigned int nr, const unsigned long *addr)
 
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{
 
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        return ((1UL << (nr % BITS_PER_LONG)) &
 
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                (((unsigned long *)addr)[nr / BITS_PER_LONG])) != 0;
 
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}
 
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static inline unsigned long hweight_long(unsigned long w)
 
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{
 
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        return sizeof(w) == 4 ? hweight32(w) : hweight64(w);
 
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}
 
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#endif