asssss

        .global mul2, main, value
mul2:
        push    %ebp
        mov     %esp, %ebp

        xor     %eax, %eax
        xor     %edx, %edx
        mov     8(%ebp), %ecx   // address
        mov     (%ecx), %eax    // value

        mov     %eax, %edx
        add     %eax, %eax
        jo      infty

fin:
        mov     %eax, (%ecx)

        mov     %ebp, %esp
        pop     %ebp
        ret

infty:
        mov     %edx, %eax
        jmp     fin

/* main:
        call    readi32
        mov     %eax, value
        mov     $value, %ecx
        push    %ecx
        call    mul2
        mov     value, %eax
        call    writei32
        pop     %ecx
        call    finish

        .data
value:
        .int 0 */