fizz buzz in assembler

fizzbuzz.s

        .include "io.s"
        .text
        .global _start
_start:
        mov x22, #1   // i = 1
        mov x24, #30  // loop max
        mov x23, #1   // 3 counter
        mov x25, #3   // 3
        mov x26, #1   // 5 counter
        mov x27, #5   // 5
        mov x28, #1   // 15 counter
        mov x29, #15  // 15
Loop:
        sub x2, x28, x29
        cbz x2, is15

        sub x2, x27, x26
        cbz x2, is5

        sub x2, x25, x23
        cbz x2, is3

        mov x1, x22
        bl print1d
final:
        sub x11, x22, x24
        cbz x11, Exit

        add x22, x22, #1
        add x23, x23, #1
        add x26, x26, #1
        add x28, x28, #1

        b Loop
Exit:
        exit

is15:
        mov x28, #0
        mov x26, #0
        mov x23, #0
        mov x1, #-2
        bl print1d
        b final
is5:
        mov x26, #0
        mov x1, #-1
        bl print1d
        b final
is3:
        mov x23, #0
        mov x1, #0
        bl print1d
        b final


        .data