shithub: front

ref: 96bf1d3ebd2f9a1051a60e880fb158ea4341b0bc
dir: /sys/src/libc/amd64/strlen.s/

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	TEXT	strlen(SB),$0

	MOVL	$0, AX
	MOVQ	$-1, CX
	CLD
/*
 * look for end of string
 */

	MOVQ	RARG, DI
	REPN;	SCASB

	MOVQ	DI, AX
	SUBQ	RARG, AX
	SUBQ	$1, AX
	RET