diff options
Diffstat (limited to 'arch/x86/include/asm/arch_hweight.h')
| -rw-r--r-- | arch/x86/include/asm/arch_hweight.h | 23 |
1 files changed, 9 insertions, 14 deletions
diff --git a/arch/x86/include/asm/arch_hweight.h b/arch/x86/include/asm/arch_hweight.h index e7cd63175de4..b5982b94bdba 100644 --- a/arch/x86/include/asm/arch_hweight.h +++ b/arch/x86/include/asm/arch_hweight.h @@ -1,31 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_HWEIGHT_H #define _ASM_X86_HWEIGHT_H #include <asm/cpufeatures.h> #ifdef CONFIG_64BIT -/* popcnt %edi, %eax */ -#define POPCNT32 ".byte 0xf3,0x0f,0xb8,0xc7" -/* popcnt %rdi, %rax */ -#define POPCNT64 ".byte 0xf3,0x48,0x0f,0xb8,0xc7" #define REG_IN "D" #define REG_OUT "a" #else -/* popcnt %eax, %eax */ -#define POPCNT32 ".byte 0xf3,0x0f,0xb8,0xc0" #define REG_IN "a" #define REG_OUT "a" #endif -#define __HAVE_ARCH_SW_HWEIGHT - static __always_inline unsigned int __arch_hweight32(unsigned int w) { unsigned int res; - asm (ALTERNATIVE("call __sw_hweight32", POPCNT32, X86_FEATURE_POPCNT) - : "="REG_OUT (res) - : REG_IN (w)); + asm_inline (ALTERNATIVE("call __sw_hweight32", + "popcntl %[val], %[cnt]", X86_FEATURE_POPCNT) + : [cnt] "=" REG_OUT (res), ASM_CALL_CONSTRAINT + : [val] REG_IN (w)); return res; } @@ -51,9 +45,10 @@ static __always_inline unsigned long __arch_hweight64(__u64 w) { unsigned long res; - asm (ALTERNATIVE("call __sw_hweight64", POPCNT64, X86_FEATURE_POPCNT) - : "="REG_OUT (res) - : REG_IN (w)); + asm_inline (ALTERNATIVE("call __sw_hweight64", + "popcntq %[val], %[cnt]", X86_FEATURE_POPCNT) + : [cnt] "=" REG_OUT (res), ASM_CALL_CONSTRAINT + : [val] REG_IN (w)); return res; } |