divmod assembly implementation

[Sam Ludacis via Digitalmars-d-learn]

G'day

I'm trying to implement the Python divmod function in D w/ 
assembly. Should look something like this...

    '''
    ulong divmod64(ulong a, ulong b, ulong quot, ulong rem)
    {
        asm {
            xor RDX, RDX;
            mov RAX, a;
            div b;
            mov quot, RAX;
            mov rem, RDX;
        }
    }
    '''

Without doubt this routine will fail. But would anyone have a way?