hw4n17.asm

%include "io.inc"

section .bss
    a resd 1
    b resd 1
    c resd 1
    ans resd 3

section .text
global CMAIN
CMAIN:
    mov ebp, esp
    GET_UDEC 4, [a]
    GET_UDEC 4, [b]
    GET_UDEC 4, [c]
    push dword [c]
    push dword [b]
    push dword [a]
    push ans
    call mul96

    xor eax, eax
    mov esp, ebp
    ret

to_string:
    push ebp
    mov ebp, esp

    leave
    ret

mul96:
    push ebp
    mov ebp, esp
    push ebx
    sub esp, 16
    mov eax, [ebp + 12]
    mov ecx, [ebp + 16]
    mul ecx
    mov [esp + 4], edx
    mov [esp], eax
    mov eax, [ebp + 20]
    mul dword [esp]
    mov [esp + 8], eax ; eax1
    mov [esp + 12], edx; edx1
    mov eax, [ebp + 20]
    mul dword [esp + 4]
    add [esp + 12], eax
    adc edx, 0
    mov ecx, [esp + 12]
    mov eax, [esp + 8]; edx:ecx:eax
    mov ebx, [ebp + 8]
    mov [ebx], eax
    mov [ebx + 4], ecx
    mov [ebx + 8], edx
    add esp, 16
    pop ebx
    pop ebp
    ret