ARM-SC2440

Filter~2024-04-18 1:08

1ARM

2ARM汇编指令集

2.1

2.1.1【MOV】

c 复制代码

	area reset, code, readonly
	code32
	entry

	mov r0, #1
	
	end

2.1.2【SUB】

c 复制代码

	area reset, code, readonly
	code32
	entry

	mov r0, #0x02
	sub r1, r0, #1

	end

2.1.3【ORR】

c 复制代码

	preserve8
	area reset, code, readonly
	code32

	entry

	mov r0, #0X0F
	mov r1, #2
	
	orr r3, r0, #0X10;将r0寄存器第4位置1，结果放入r3

	end

2.1.4【BIC】

c 复制代码

	preserve8
	area reset, code, readonly
	code32

	entry

	mov r0, #0X0F
	mov r1, #2
	
	bic r2, r0, #0X08;将r0寄存器第3位清0，结果放入r2

	end

2.1.5【cmp】

c 复制代码

/*比较2个数大小，并找到大的数*/
	area reset, code, readonly
	code32
	entry

	mov r1, #1
	mov r2, #2
	
	cmp r1, r2
	movge r4, r1
	movlt r4, r2

	end

2.1.6【b】

c 复制代码

	area reset, code, readonly
	code32
	entry

	;demo4
	mov r1, #1
	mov r2, #2

	cmp r1, r2
	bge greater
	blt less

greater 
	mov r3, r1
	b finish
less
	mov r3, r2

finish
	b finish

	end

c 复制代码

	area reset, code, readonly
	code32
	entry

	;demo5
	mov r1, #0
	mov r2, #0

loop
	add r2, r2, r1
	add r1, #1

	cmp r1, #128
	ble loop

finish
	b finish
	
	end

2.1.6.2【bl】

c 复制代码

	area reset, code, readonly
	code32
	entry

	mov r1, #0
	mov r2, #0
	bl asm_add
	nop
	nop
	nop

asm_add
	add r1, r1,r2
	mov pc, lr 
	;bx lr

finish
	b finish
		
	end

c 复制代码

//【bl】指令完成数的累加