ARM汇编语言实现while循环

.section .data
.output:
	.ascii "%d\n\000"
.section .text
	.global main
main:
	mov ip, sp
	stmfd sp!, {fp,ip,lr,pc}
	sub fp, ip, #4
	sub sp, sp, #80 

	@memory and register

	mov r3, # 1
	mov r0,r3

loop:
	cmp r0,# 15
	bge stop
	mov r1,# 1
	add r2, r0, r1
	mov r0, r2 

	@保护现场
	str r0, [fp,#-16]	

	str r0,[fp,# -20 ]
	ldr r0, =.output
	ldr r1,[fp,# -20 ]
	bl printf  

	@恢复现场
	ldr r0,[fp,#-16]

	b loop
stop:
	ldmea fp, {fp,sp,pc}

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