Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-17 17:41:44 +00:00
Code Issues Packages Projects Releases Wiki Activity

Blackfin: add optimized version of Hamming Weight functions

Browse Source 
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Michael Hennerich 2009-12-22 11:32:06 +00:00 committed by Mike Frysinger
parent 252077cf7d
commit 0f7b468b6e
2 changed files with 58 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/blackfin/Kconfig
View File

@ -45,9 +45,6 @@ config ZONE_DMA
config GENERIC_FIND_NEXT_BIT
def_bool y
config GENERIC_HWEIGHT
def_bool y
config GENERIC_HARDIRQS
def_bool y

80
arch/blackfin/include/asm/bitops.h
View File

@ -7,22 +7,41 @@
#ifndef _BLACKFIN_BITOPS_H
#define _BLACKFIN_BITOPS_H
#ifndef CONFIG_SMP
# include <asm-generic/bitops.h>
#else
#include <linux/compiler.h>
#include <asm-generic/bitops/__ffs.h>
#include <asm-generic/bitops/ffz.h>
#include <asm-generic/bitops/fls.h>
#include <asm-generic/bitops/__fls.h>
#include <asm-generic/bitops/fls64.h>
#include <asm-generic/bitops/find.h>
#ifndef _LINUX_BITOPS_H
#error only <linux/bitops.h> can be included directly
#endif
#include <linux/compiler.h>
#include <asm/byteorder.h> /* swab32 */
#include <asm-generic/bitops/ffs.h>
#include <asm-generic/bitops/__ffs.h>
#include <asm-generic/bitops/sched.h>
#include <asm-generic/bitops/ffz.h>
#include <asm-generic/bitops/ffs.h>
#include <asm-generic/bitops/lock.h>
#include <asm-generic/bitops/ext2-non-atomic.h>
#include <asm-generic/bitops/ext2-atomic.h>
#include <asm-generic/bitops/minix.h>
#ifndef CONFIG_SMP
#include <linux/irqflags.h>
/*
* clear_bit may not imply a memory barrier
*/
#ifndef smp_mb__before_clear_bit
#define smp_mb__before_clear_bit() smp_mb()
#define smp_mb__after_clear_bit() smp_mb()
#endif
#include <asm-generic/bitops/atomic.h>
#include <asm-generic/bitops/non-atomic.h>
#else
#include <asm/byteorder.h> /* swab32 */
#include <linux/linkage.h>
asmlinkage int __raw_bit_set_asm(volatile unsigned long *addr, int nr);
@ -89,19 +108,36 @@ static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
#include <asm-generic/bitops/non-atomic.h>
#include <asm-generic/bitops/find.h>
#include <asm-generic/bitops/hweight.h>
#include <asm-generic/bitops/lock.h>
#include <asm-generic/bitops/ext2-atomic.h>
#include <asm-generic/bitops/ext2-non-atomic.h>
#include <asm-generic/bitops/minix.h>
#include <asm-generic/bitops/fls.h>
#include <asm-generic/bitops/__fls.h>
#include <asm-generic/bitops/fls64.h>
#endif /* CONFIG_SMP */
/*
* hweightN: returns the hamming weight (i.e. the number
* of bits set) of a N-bit word
*/
static inline unsigned int hweight32(unsigned int w)
{
unsigned int res;
__asm__ ("%0.l = ONES %0;"
"%0 = %0.l (Z);"
: "=d" (res) : "d" (w));
return res;
}
static inline unsigned int hweight64(__u64 w)
{
return hweight32((unsigned int)(w >> 32)) + hweight32((unsigned int)w);
}
static inline unsigned int hweight16(unsigned int w)
{
return hweight32(w & 0xffff);
}
static inline unsigned int hweight8(unsigned int w)
{
return hweight32(w & 0xff);
}
#endif /* _BLACKFIN_BITOPS_H */