915b0882c3
So that lib/find_bit.c doesn't requires anything inside tools/perf/ Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: George Spelvin <linux@horizon.com Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Wang Nan <wangnan0@huawei.com> Cc: Yury Norov <yury.norov@gmail.com> Link: http://lkml.kernel.org/n/tip-7lxe7jgohaac5faodndhdmvk@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
#ifndef _PERF_BITOPS_H
|
|
#define _PERF_BITOPS_H
|
|
|
|
#include <string.h>
|
|
#include <linux/bitops.h>
|
|
|
|
#define DECLARE_BITMAP(name,bits) \
|
|
unsigned long name[BITS_TO_LONGS(bits)]
|
|
|
|
int __bitmap_weight(const unsigned long *bitmap, int bits);
|
|
void __bitmap_or(unsigned long *dst, const unsigned long *bitmap1,
|
|
const unsigned long *bitmap2, int bits);
|
|
|
|
#define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) & (BITS_PER_LONG - 1)))
|
|
|
|
#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);
|
|
}
|
|
|
|
static inline void bitmap_or(unsigned long *dst, const unsigned long *src1,
|
|
const unsigned long *src2, int nbits)
|
|
{
|
|
if (small_const_nbits(nbits))
|
|
*dst = *src1 | *src2;
|
|
else
|
|
__bitmap_or(dst, src1, src2, nbits);
|
|
}
|
|
|
|
/**
|
|
* test_and_set_bit - Set a bit and return its old value
|
|
* @nr: Bit to set
|
|
* @addr: Address to count from
|
|
*/
|
|
static inline int test_and_set_bit(int nr, unsigned long *addr)
|
|
{
|
|
unsigned long mask = BIT_MASK(nr);
|
|
unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
|
|
unsigned long old;
|
|
|
|
old = *p;
|
|
*p = old | mask;
|
|
|
|
return (old & mask) != 0;
|
|
}
|
|
|
|
#endif /* _PERF_BITOPS_H */
|