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![David Daney](/assets/img/avatar_default.png)
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: David 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: Ralf Baechle <ralf@linux-mips.org>
38 lines
792 B
C
38 lines
792 B
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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*/
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#ifndef _ASM_ARCH_HWEIGHT_H
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#define _ASM_ARCH_HWEIGHT_H
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#ifdef ARCH_HAS_USABLE_BUILTIN_POPCOUNT
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#include <asm/types.h>
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static inline unsigned int __arch_hweight32(unsigned int w)
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{
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return __builtin_popcount(w);
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}
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static inline unsigned int __arch_hweight16(unsigned int w)
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{
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return __builtin_popcount(w & 0xffff);
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}
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static inline unsigned int __arch_hweight8(unsigned int w)
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{
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return __builtin_popcount(w & 0xff);
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}
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static inline unsigned long __arch_hweight64(__u64 w)
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{
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return __builtin_popcountll(w);
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}
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#else
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#include <asm-generic/bitops/arch_hweight.h>
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#endif
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#endif /* _ASM_ARCH_HWEIGHT_H */
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