汇编指令9.8

 

.text
.globl _start
	_start:
	mov r0,#0x04
	mov r1,#0x05
	
	b loop
	
	subhi r0,r0,r1
	subls r1,r0,r1 
	
	loop:
	
	cmp r0,r1
	
	beq  stop
	subhi r0,r0,r1
	subls r1,r1,r0 
	
	b loop

	
	
	
	stop:
	b stop
	.end
		

1.for循环进行编写

for(表达式1；表达式2；表达式3) { 表达式4； } [1][2],[4][3][2],[4][3][2],[4][3][2]

.text
.globl _start
	_start:

    mov r0,#1
    mov r1,#0
sum:
    cmp r0,#100
	bhi stop
	add r1,r1,r0
	add r0,r0,#1
	b sum
	
	
	stop:
	b stop
	.end