Assemblyben miert kap rossz erteket a valtozom?

a [b] ertek nem az amit beolvasok, az elso esetre nem jo eredmenyt kapok(-3,-6,0,12) es bemenettel 24-et kene irjon de 24154-et ad

%include 'io.inc'

global main

section .text

main:

mov eax, str_a

call io_writestr

call io_readint

mov [a], eax

mov eax, str_b

call io_writestr

call io_readint

mov [b], eax

mov eax, str_c

call io_writestr

call io_readint

mov [c], eax

mov eax, str_d

call io_writestr

call io_readint

mov [d], eax

mov eax, [d]

mov ebx, 3

cdq

idiv ebx

mov eax, [b]

call io_writeint

cmp edx, 0

je eset1

cmp edx, 1

je eset2

cmp edx, 2

je eset3

eset1:

;ha d mod 3 = 0 : 9 - (a + (2 * b)) + c

mov eax, [b]

imul eax, 2

add eax, [a]

mov ebx, 9

sub ebx, eax

add ebx, [c]

mov eax, ebx

call io_writeint

eset2:

;ha d mod 3 = 1 : 13 + (b div a) * (c + 1)

mov eax, [b]

mov ebx, [a]

cdq

idiv ebx

mov ebx, [c]

inc ebx

imul eax, ebx

add eax, 13

call io_writeint

eset3:

;ha d mod 3 = 2 : (c div 2) - (c mod 2) + 4

mov eax, [c]

mov ebx, 2

cdq

idiv ebx

mov edi, eax

;a hanyados az edi-ban

mov eax, [c]

mov ebx, 2

cdq

idiv ebx

mov eax, edx

sub edi, eax

add edi, 4

mov eax, edi

call io_writeint

section .data

a dd 0

b dd 0

c dd 0

d dd 0

str_a db 'A = ', 0

str_b db 'B = ', 0

str_c db 'C = ', 0

str_d db 'D = ', 0