Commit 1a403d1d authored by David Daney's avatar David Daney Committed by Ralf Baechle
Browse files

MIPS: Create and use asm/arch_hweight.h 



Some MIPS ISA processor varients can do hweight operations
efficiently.

Split arch_hweight.h into a seperate file, and implement the
operations with __builtin_popcount{,ll} if supported.

Signed-off-by: default avatarDavid Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Cc: David Daney <ddaney@caviumnetworks.com>
Patchwork: https://patchwork.linux-mips.org/patch/1430/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent d16f7093

arch/mips/include/asm/arch_hweight.h

0 → 100644
+38 −0
Original line number Diff line number Diff line 
/*

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 */

#ifndef _ASM_ARCH_HWEIGHT_H

#define _ASM_ARCH_HWEIGHT_H



#ifdef ARCH_HAS_USABLE_BUILTIN_POPCOUNT



#include <asm/types.h>



static inline unsigned int __arch_hweight32(unsigned int w)

{

	return __builtin_popcount(w);

}



static inline unsigned int __arch_hweight16(unsigned int w)

{

	return __builtin_popcount(w & 0xffff);

}



static inline unsigned int __arch_hweight8(unsigned int w)

{

	return __builtin_popcount(w & 0xff);

}



static inline unsigned long __arch_hweight64(__u64 w)

{

	return __builtin_popcountll(w);

}



#else

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

#endif



#endif /* _ASM_ARCH_HWEIGHT_H */

arch/mips/include/asm/bitops.h

+4 −1
Original line number Diff line number Diff line
@@ -700,7 +700,10 @@ static inline int ffs(int word) 
#ifdef __KERNEL__



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

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



#include <asm/arch_hweight.h>

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



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

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

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

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