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view target-utils/libc/memcmp.S @ 624:7485e75d9477

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srec-regions: removed unnecessary prohibition against address going backward
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 27 Feb 2020 08:12:11 +0000
parents a675cec34076
children
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line source

	.text
	.code	32
	.globl	bcmp
	.globl	memcmp
bcmp:
memcmp:
	cmp	r2, #0
	beq	zero_len_out
	mov	r3, r0
1:	ldrb	r0, [r3], #1
	ldrb	r12, [r1], #1
	subs	r0, r0, r12
	bxne	lr
	subs	r2, r2, #1
	bne	1b
	bx	lr

zero_len_out:
	mov	r0, #0
	bx	lr