[deliverable/linux.git] / include / asm-x86 / bitops_64.h

#ifndef _X86_64_BITOPS_H
#define _X86_64_BITOPS_H

/*
 * Copyright 1992, Linus Torvalds.
 */

#ifndef CONFIG_GENERIC_FIND_FIRST_BIT
extern long find_first_zero_bit(const unsigned long *addr, unsigned long size);
extern long find_first_bit(const unsigned long *addr, unsigned long size);

/* return index of first bet set in val or max when no bit is set */
static inline long __scanbit(unsigned long val, unsigned long max)
{
	asm("bsfq %1,%0 ; cmovz %2,%0" : "=&r" (val) : "r" (val), "r" (max));
	return val;
}

#define find_first_bit(addr, size)					\
	((__builtin_constant_p((size)) && (size) <= BITS_PER_LONG	\
	  ? (__scanbit(*(unsigned long *)(addr), (size)))		\
	  : find_first_bit((addr), (size))))

#define find_first_zero_bit(addr, size)					\
	((__builtin_constant_p((size)) && (size) <= BITS_PER_LONG	\
	  ? (__scanbit(~*(unsigned long *)(addr), (size)))		\
	  : find_first_zero_bit((addr), (size))))
#endif

static inline void set_bit_string(unsigned long *bitmap, unsigned long i,
				  int len)
{
	unsigned long end = i + len;
	while (i < end) {
		__set_bit(i, bitmap);
		i++;
	}
}

#ifdef __KERNEL__

#include <asm-generic/bitops/sched.h>

#define ARCH_HAS_FAST_MULTIPLIER 1

#include <asm-generic/bitops/hweight.h>

#endif /* __KERNEL__ */

#include <asm-generic/bitops/fls64.h>

#ifdef __KERNEL__

#include <asm-generic/bitops/ext2-non-atomic.h>

#define ext2_set_bit_atomic(lock, nr, addr)			\
	test_and_set_bit((nr), (unsigned long *)(addr))
#define ext2_clear_bit_atomic(lock, nr, addr)			\
	test_and_clear_bit((nr), (unsigned long *)(addr))

#include <asm-generic/bitops/minix.h>

#endif /* __KERNEL__ */

#endif /* _X86_64_BITOPS_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _X86_64_BITOPS_H
	2	#define _X86_64_BITOPS_H
	3
	4	/*
	5	* Copyright 1992, Linus Torvalds.
	6	*/
	7
2aba6925	8	#ifndef CONFIG_GENERIC_FIND_FIRST_BIT
ade8c56c	9	extern long find_first_zero_bit(const unsigned long *addr, unsigned long size);
ade8c56c	10	extern long find_first_bit(const unsigned long *addr, unsigned long size);
1da177e4 LT	11
1da177e4 LT	12	/* return index of first bet set in val or max when no bit is set */
d2ccc3fd	13	static inline long __scanbit(unsigned long val, unsigned long max)
1da177e4 LT	14	{
	15	asm("bsfq %1,%0 ; cmovz %2,%0" : "=&r" (val) : "r" (val), "r" (max));
	16	return val;
	17	}
	18
49f74946 JP	19	#define find_first_bit(addr, size) \
	20	((__builtin_constant_p((size)) && (size) <= BITS_PER_LONG \
	21	? (__scanbit((unsigned long )(addr), (size))) \
	22	: find_first_bit((addr), (size))))
	23
	24	#define find_first_zero_bit(addr, size) \
	25	((__builtin_constant_p((size)) && (size) <= BITS_PER_LONG \
	26	? (__scanbit(~(unsigned long )(addr), (size))) \
	27	: find_first_zero_bit((addr), (size))))
2aba6925	28	#endif
49f74946 JP	29
	30	static inline void set_bit_string(unsigned long *bitmap, unsigned long i,
	31	int len)
	32	{
	33	unsigned long end = i + len;
1da177e4	34	while (i < end) {
49f74946	35	__set_bit(i, bitmap);
1da177e4 LT	36	i++;
1da177e4 LT	37	}
49f74946	38	}
1da177e4	39
1da177e4 LT	40	#ifdef __KERNEL__
1da177e4 LT	41
f33e2fba	42	#include <asm-generic/bitops/sched.h>
1da177e4	43
0136611c AK	44	#define ARCH_HAS_FAST_MULTIPLIER 1
0136611c AK	45
f33e2fba	46	#include <asm-generic/bitops/hweight.h>
1da177e4 LT	47
	48	#endif /* __KERNEL__ */
	49
d57594c2 AH	50	#include <asm-generic/bitops/fls64.h>
d57594c2 AH	51
1da177e4 LT	52	#ifdef __KERNEL__
1da177e4 LT	53
f33e2fba AM	54	#include <asm-generic/bitops/ext2-non-atomic.h>
f33e2fba AM	55
49f74946 JP	56	#define ext2_set_bit_atomic(lock, nr, addr) \
	57	test_and_set_bit((nr), (unsigned long *)(addr))
	58	#define ext2_clear_bit_atomic(lock, nr, addr) \
	59	test_and_clear_bit((nr), (unsigned long *)(addr))
f33e2fba AM	60
f33e2fba AM	61	#include <asm-generic/bitops/minix.h>
1da177e4	62
1da177e4 LT	63	#endif /* __KERNEL__ */
	64
	65	#endif /* _X86_64_BITOPS_H */