.intel_syntax noprefix
.global main
.text
    main:
        mov eax, [esp+8]
        mov eax, [eax+4]
        push eax
        call atoi
        add esp, 4

        push eax
        call f

        add esp, 4
        push eax
        push offset msg
        call printf
        add esp, 8
        xor eax, eax
        ret

    f:
        cmp eax, 2
        je return1
        cmp eax, 1
        je return1

        dec eax
        push eax    #; n-1
        call f
        add esp, 4
        push eax    #; f(n-1)

        mov eax, [esp+8]    #; get n
        sub eax, 2
        push eax    #; n-2
        call f
        add esp, 4

        add eax, [esp]
        add esp, 4

        ret

    return1:
        mov eax, 1
        ret

.data
    msg: .asciz "%d\n"


#; if (n == 1 || n == 2) return 1;
#; return f(n-2) + f(n-1)