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view target-utils/libc/strlen.S @ 399:5e91b1c107eb

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fc-shell help file: documented key, keydown and keyup commands
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 16 Mar 2018 01:47:08 +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