[GitHub/mt8127/android_kernel_alcatel_ttab.git] / tools / perf / util / include / linux / bitmap.h

#ifndef _PERF_BITOPS_H
#define _PERF_BITOPS_H

#include <string.h>
#include <linux/bitops.h>

int __bitmap_weight(const unsigned long *bitmap, int bits);

#define BITMAP_LAST_WORD_MASK(nbits)					\
(									\
	((nbits) % BITS_PER_LONG) ?					\
		(1UL<<((nbits) % BITS_PER_LONG))-1 : ~0UL		\
)

#define small_const_nbits(nbits) \
	(__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG)

static inline void bitmap_zero(unsigned long *dst, int nbits)
{
	if (small_const_nbits(nbits))
		*dst = 0UL;
	else {
		int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
		memset(dst, 0, len);
	}
}

static inline int bitmap_weight(const unsigned long *src, int nbits)
{
	if (small_const_nbits(nbits))
		return hweight_long(*src & BITMAP_LAST_WORD_MASK(nbits));
	return __bitmap_weight(src, nbits);
}

#endif /* _PERF_BITOPS_H */
Commit	Line	Data
fb72014d ACM	1	#ifndef _PERF_BITOPS_H
	2	#define _PERF_BITOPS_H
	3
	4	#include <string.h>
	5	#include <linux/bitops.h>
	6
	7	int __bitmap_weight(const unsigned long *bitmap, int bits);
	8
	9	#define BITMAP_LAST_WORD_MASK(nbits) \
	10	( \
	11	((nbits) % BITS_PER_LONG) ? \
	12	(1UL<<((nbits) % BITS_PER_LONG))-1 : ~0UL \
	13	)
	14
	15	#define small_const_nbits(nbits) \
	16	(__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG)
	17
	18	static inline void bitmap_zero(unsigned long *dst, int nbits)
	19	{
	20	if (small_const_nbits(nbits))
	21	*dst = 0UL;
	22	else {
	23	int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
	24	memset(dst, 0, len);
	25	}
	26	}
	27
	28	static inline int bitmap_weight(const unsigned long *src, int nbits)
	29	{
	30	if (small_const_nbits(nbits))
	31	return hweight_long(*src & BITMAP_LAST_WORD_MASK(nbits));
	32	return __bitmap_weight(src, nbits);
	33	}
	34
	35	#endif /* _PERF_BITOPS_H */