shithub: femtolisp

ref: 3f168e51ab3000409905edd2e2b6e1ba6cd60aa5
dir: /builtins_plan9_amd64.s/

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TEXT __builtin_clz(SB),1,$0
	BYTE $0x0F; BYTE $0xBD; BYTE $0xC5 /* BSRL RARG, AX */
	XORL $31, AX
	RET