mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 16:23:20 +00:00
1527bc8b92
Rename the extisting runtime hweight() implementations to __arch_hweight(), rename the compile-time versions to __const_hweight() and then have hweight() pick between them. Suggested-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20100318111929.GB11152@aftab> Acked-by: H. Peter Anvin <hpa@zytor.com> LKML-Reference: <1265028224.24455.154.camel@laptop> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
/*
|
|
* bitops.h: Bit string operations on the V9.
|
|
*
|
|
* Copyright 1996, 1997 David S. Miller (davem@caip.rutgers.edu)
|
|
*/
|
|
|
|
#ifndef _SPARC64_BITOPS_H
|
|
#define _SPARC64_BITOPS_H
|
|
|
|
#ifndef _LINUX_BITOPS_H
|
|
#error only <linux/bitops.h> can be included directly
|
|
#endif
|
|
|
|
#include <linux/compiler.h>
|
|
#include <asm/byteorder.h>
|
|
|
|
extern int test_and_set_bit(unsigned long nr, volatile unsigned long *addr);
|
|
extern int test_and_clear_bit(unsigned long nr, volatile unsigned long *addr);
|
|
extern int test_and_change_bit(unsigned long nr, volatile unsigned long *addr);
|
|
extern void set_bit(unsigned long nr, volatile unsigned long *addr);
|
|
extern void clear_bit(unsigned long nr, volatile unsigned long *addr);
|
|
extern void change_bit(unsigned long nr, volatile unsigned long *addr);
|
|
|
|
#include <asm-generic/bitops/non-atomic.h>
|
|
|
|
#define smp_mb__before_clear_bit() barrier()
|
|
#define smp_mb__after_clear_bit() barrier()
|
|
|
|
#include <asm-generic/bitops/ffz.h>
|
|
#include <asm-generic/bitops/__ffs.h>
|
|
#include <asm-generic/bitops/fls.h>
|
|
#include <asm-generic/bitops/__fls.h>
|
|
#include <asm-generic/bitops/fls64.h>
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <asm-generic/bitops/sched.h>
|
|
#include <asm-generic/bitops/ffs.h>
|
|
|
|
/*
|
|
* hweightN: returns the hamming weight (i.e. the number
|
|
* of bits set) of a N-bit word
|
|
*/
|
|
|
|
#ifdef ULTRA_HAS_POPULATION_COUNT
|
|
|
|
static inline unsigned int __arch_hweight64(unsigned long w)
|
|
{
|
|
unsigned int res;
|
|
|
|
__asm__ ("popc %1,%0" : "=r" (res) : "r" (w));
|
|
return res;
|
|
}
|
|
|
|
static inline unsigned int __arch_hweight32(unsigned int w)
|
|
{
|
|
unsigned int res;
|
|
|
|
__asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xffffffff));
|
|
return res;
|
|
}
|
|
|
|
static inline unsigned int __arch_hweight16(unsigned int w)
|
|
{
|
|
unsigned int res;
|
|
|
|
__asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xffff));
|
|
return res;
|
|
}
|
|
|
|
static inline unsigned int __arch_hweight8(unsigned int w)
|
|
{
|
|
unsigned int res;
|
|
|
|
__asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xff));
|
|
return res;
|
|
}
|
|
|
|
#else
|
|
|
|
#include <asm-generic/bitops/arch_hweight.h>
|
|
|
|
#endif
|
|
#include <asm-generic/bitops/const_hweight.h>
|
|
#include <asm-generic/bitops/lock.h>
|
|
#endif /* __KERNEL__ */
|
|
|
|
#include <asm-generic/bitops/find.h>
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <asm-generic/bitops/ext2-non-atomic.h>
|
|
|
|
#define ext2_set_bit_atomic(lock,nr,addr) \
|
|
test_and_set_bit((nr) ^ 0x38,(unsigned long *)(addr))
|
|
#define ext2_clear_bit_atomic(lock,nr,addr) \
|
|
test_and_clear_bit((nr) ^ 0x38,(unsigned long *)(addr))
|
|
|
|
#include <asm-generic/bitops/minix.h>
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* defined(_SPARC64_BITOPS_H) */
|