d57594c203
Use __fls for fls64 on 64-bit archs. The implementation for 64-bit archs is moved from x86_64 to asm-generic. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
#ifndef _X86_64_BITOPS_H
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#define _X86_64_BITOPS_H
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/*
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* Copyright 1992, Linus Torvalds.
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*/
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extern long find_first_zero_bit(const unsigned long *addr, unsigned long size);
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extern long find_first_bit(const unsigned long *addr, unsigned long size);
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/* return index of first bet set in val or max when no bit is set */
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static inline long __scanbit(unsigned long val, unsigned long max)
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{
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asm("bsfq %1,%0 ; cmovz %2,%0" : "=&r" (val) : "r" (val), "r" (max));
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return val;
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}
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#define find_first_bit(addr, size) \
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((__builtin_constant_p((size)) && (size) <= BITS_PER_LONG \
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? (__scanbit(*(unsigned long *)(addr), (size))) \
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: find_first_bit((addr), (size))))
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#define find_first_zero_bit(addr, size) \
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((__builtin_constant_p((size)) && (size) <= BITS_PER_LONG \
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? (__scanbit(~*(unsigned long *)(addr), (size))) \
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: find_first_zero_bit((addr), (size))))
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static inline void set_bit_string(unsigned long *bitmap, unsigned long i,
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int len)
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{
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unsigned long end = i + len;
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while (i < end) {
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__set_bit(i, bitmap);
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i++;
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}
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}
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#ifdef __KERNEL__
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#include <asm-generic/bitops/sched.h>
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#define ARCH_HAS_FAST_MULTIPLIER 1
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#include <asm-generic/bitops/hweight.h>
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#endif /* __KERNEL__ */
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#include <asm-generic/bitops/fls64.h>
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#ifdef __KERNEL__
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#include <asm-generic/bitops/ext2-non-atomic.h>
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#define ext2_set_bit_atomic(lock, nr, addr) \
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test_and_set_bit((nr), (unsigned long *)(addr))
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#define ext2_clear_bit_atomic(lock, nr, addr) \
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test_and_clear_bit((nr), (unsigned long *)(addr))
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#include <asm-generic/bitops/minix.h>
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#endif /* __KERNEL__ */
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#endif /* _X86_64_BITOPS_H */
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