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view target-utils/libc/strlen.S @ 582:deda54106c0e

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doc/Target-boot-control: first draft
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 03 Feb 2020 01:25:31 +0000
parents 3670e7768ab6
children
line wrap: on
line source

	.text
	.code	32
	.globl	strlen
strlen:
	mov	r1, r0
1:	ldrb	r2, [r0], #1
	cmn	r2, #0
	bne	1b
	sbc	r0, r0, r1
	bx	lr