section .data
    num1 dd 1250
    num2 dd 250

    msgAdd db "Addition = "
    lenAdd equ $-msgAdd

    msgSub db "Subtraction = "
    lenSub equ $-msgSub

    msgMul db "Multiplication = "
    lenMul equ $-msgMul

    msgDiv db "Division = "
    lenDiv equ $-msgDiv

section .bss
    buffer resb 20

section .text
    global _start

_start:

; =================================
; ADDITION
; 12.50 + 2.50 = 15.00
; =================================

    mov eax, [num1]
    \



    
    add eax, [num2]

    push rax

    mov eax, 1
    mov edi, 1
    mov rsi, msgAdd
    mov edx, lenAdd
    syscall

    pop rax
    call print_float


; =================================
; SUBTRACTION
; 12.50 - 2.50 = 10.00
; =================================

    mov eax, [num1]
    sub eax, [num2]

    push rax

    mov eax, 1
    mov edi, 1
    mov rsi, msgSub
    mov edx, lenSub
    syscall

    pop rax
    call print_float


; =================================
; MULTIPLICATION
; 12.50 × 2.50 = 31.25
; =================================

    mov eax, [num1]
    mov ebx, [num2]
    imul eax, ebx

    ; Divide by 100 to maintain decimal scale
    mov ebx, 100
    xor edx, edx
    div ebx

    push rax

    mov eax, 1
    mov edi, 1
    mov rsi, msgMul
    mov edx, lenMul
    syscall

    pop rax
    call print_float


; =================================
; DIVISION
; 12.50 ÷ 2.50 = 5.00
; =================================

    mov eax, [num1]

    ; Multiply by 100 before division
    ; to maintain two decimal places
    imul eax, 100

    xor edx, edx
    mov ebx, [num2]
    div ebx

    push rax

    mov eax, 1
    mov edi, 1
    mov rsi, msgDiv
    mov edx, lenDiv
    syscall

    pop rax
    call print_float


; =================================
; EXIT
; =================================

    mov eax, 60
    xor edi, edi
    syscall


; =================================
; PRINT FLOAT
; =================================

print_float:

    ; Divide by 100
    xor edx, edx
    mov ebx, 100
    div ebx

    ; Save fractional part
    push rdx

    ; Print integer part
    mov edi, eax
    call print_number

    ; Print decimal point
    mov byte [buffer], '.'

    mov eax, 1
    mov edi, 1
    mov rsi, buffer
    mov edx, 1
    syscall

    ; Get fractional part
    pop rax

    ; If fraction is less than 10,
    ; print leading zero
    cmp eax, 10
    jae print_fraction

    push rax

    mov byte [buffer], '0'

    mov eax, 1
    mov edi, 1
    mov rsi, buffer
    mov edx, 1
    syscall

    pop rax

print_fraction:

    mov edi, eax
    call print_number

    ; New line
    mov byte [buffer], 10

    mov eax, 1
    mov edi, 1
    mov rsi, buffer
    mov edx, 1
    syscall

    ret


; =================================
; PRINT INTEGER
; =================================

print_number:

    mov eax, edi
    mov ecx, 10
    mov rsi, buffer + 19

convert:

    xor edx, edx
    div ecx

    add dl, '0'
    dec rsi
    mov [rsi], dl

    test eax, eax
    jnz convert

    mov rdx, buffer + 19
    sub rdx, rsi

    mov eax, 1
    mov edi, 1
    syscall

    ret