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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_HWEIGHT_H #define _ASM_X86_HWEIGHT_H #include <asm/cpufeatures.h> #ifdef CONFIG_64BIT #define REG_IN "D" #define REG_OUT "a" #else #define REG_IN "a" #define REG_OUT "a" #endif static __always_inline unsigned int __arch_hweight32(unsigned int w) { unsigned int res; asm (ALTERNATIVE("call __sw_hweight32", "popcntl %1, %0", X86_FEATURE_POPCNT) : "="REG_OUT (res) : REG_IN (w)); return res; } static inline unsigned int __arch_hweight16(unsigned int w) { return __arch_hweight32(w & 0xffff); } static inline unsigned int __arch_hweight8(unsigned int w) { return __arch_hweight32(w & 0xff); } #ifdef CONFIG_X86_32 static inline unsigned long __arch_hweight64(__u64 w) { return __arch_hweight32((u32)w) + __arch_hweight32((u32)(w >> 32)); } #else static __always_inline unsigned long __arch_hweight64(__u64 w) { unsigned long res; asm (ALTERNATIVE("call __sw_hweight64", "popcntq %1, %0", X86_FEATURE_POPCNT) : "="REG_OUT (res) : REG_IN (w)); return res; } #endif /* CONFIG_X86_32 */ #endif