/usr/web/sources/patch/maybe/ape-updates/strlen.s

Plan 9 from Bell Labs’s /usr/web/sources/patch/maybe/ape-updates/strlen.s


	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

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