aarch_9_loop

aarch_9_loop.s

.text
.globl    _start
start = 0 	/* starting value for the loop index; note that this is a symbol (constant), not a variable */
max = 10		/* loop exits when the index hits this number (loop condition is i<max) */
ten = 10

_start:
        mov     x19, start
        mov     x22, ten
		
loop:
        adr     x1, msg
        mov     x2, len
        mov     x0, 1
        mov     x8, 64
        svc     0
        adr     x23, msg
        add     x19, x19, 1
        udiv    x20, x19, x22
        msub    x21, x22, x20, x19
        cmp     x20, 0
        beq     skip
        add     x20, x20, '0'
        strb    w20, [x23,6]
skip:
        add     x21, x21, '0'
        strb    w21, [x23,7]
        cmp     x19, max
        bne     loop
        mov     x0, 0
        mov     x8, 93
        svc     0
.data
        msg: .ascii  "Loop:  0\n"
        len = . - msg

aarch_9_loop_objdump.txt

aarch_9_loop:     file format elf64-littleaarch64


Disassembly of section .text:

00000000004000b0 <_start>:
  4000b0:	d2800013 	mov	x19, #0x0                   	// #0
  4000b4:	d2800156 	mov	x22, #0xa                   	// #10

00000000004000b8 <loop>:
  4000b8:	10080281 	adr	x1, 410108 <msg>
  4000bc:	d2800122 	mov	x2, #0x9                   	// #9
  4000c0:	d2800020 	mov	x0, #0x1                   	// #1
  4000c4:	d2800808 	mov	x8, #0x40                  	// #64
  4000c8:	d4000001 	svc	#0x0
  4000cc:	100801f7 	adr	x23, 410108 <msg>
  4000d0:	91000673 	add	x19, x19, #0x1
  4000d4:	9ad60a74 	udiv	x20, x19, x22
  4000d8:	9b14ced5 	msub	x21, x22, x20, x19
  4000dc:	f100029f 	cmp	x20, #0x0
  4000e0:	54000060 	b.eq	4000ec <skip>
  4000e4:	9100c294 	add	x20, x20, #0x30
  4000e8:	39001af4 	strb	w20, [x23,#6]

00000000004000ec <skip>:
  4000ec:	9100c2b5 	add	x21, x21, #0x30
  4000f0:	39001ef5 	strb	w21, [x23,#7]
  4000f4:	f1002a7f 	cmp	x19, #0xa
  4000f8:	54fffe01 	b.ne	4000b8 <loop>
  4000fc:	d2800000 	mov	x0, #0x0                   	// #0
  400100:	d2800ba8 	mov	x8, #0x5d                  	// #93
400104: d4000001 svc #0x0