bits 64

    SECTION .data
; empty

    SECTION .text
global _start
_start:
    %include "header.asm.inc"

    ; division: 17 / 4 (in 64-bit)
    mov     rcx, 4          ; divisor

    mov     rax, 17         ; dividend (LSB)
    mov     rdx, 0          ; dividend (MSB)
    div     cl              ; 8-bit divisor, dividend is in AX
                            ; ---> al = 4 (quotient), ah = 1 (remainder)
    
    mov     rax, 17         ; dividend (LSB)
    mov     rdx, 0          ; dividend (MSB)
    div     cx              ; 16-bit divisor, dividend is in DX:AX
                            ; ---> ax = 4 (quotient), dx = 1 (remainder)
    
    mov     rax, 17         ; dividend (LSB)
    mov     rdx, 0          ; dividend (MSB)
    div     ecx             ; 32-bit divisor, dividend is in EDX:EAX
                            ; ---> eax = 4 (quotient), edx = 1 (remainder)
    
    mov     rax, 17         ; dividend (LSB)
    mov     rdx, 0          ; dividend (MSB)
    div     rcx             ; 64-bit divisor, dividend is in RDX:RAX
                            ; ---> rax = 4 (quotient), rdx = 1 (remainder)
    
    ; challenge: 254 % 16
    mov     rcx, 16         ; divisor (64-bit)
    mov     rax, 0xfe       ; dividend (LSB)
    mov     rdx, 0          ; dividend (MSB)
    div     rcx             ; ---> rax = 15 (quotient), rdx = 14 (remainder)

    %include "sysexit.asm.inc"