12 lines
266 B
ArmAsm
12 lines
266 B
ArmAsm
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// +build amd64,!appengine,!popcntgo
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#define POPCNTQ_DX_DX BYTE $0xf3; BYTE $0x48; BYTE $0x0f; BYTE $0xb8; BYTE $0xd2
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// func Popcnt(x uint64) uint64
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TEXT ·Popcnt(SB),4,$0-16
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MOVQ x+0(FP), DX
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POPCNTQ_DX_DX
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MOVQ DX, ret+8(FP)
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RET
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