Show inverted filter result

Hi list. Is there an easy way to list routes that do NOT match filter? I can do "show route filter f_myfilter" to list routes that would match filter. I'm hoping for something like "show route filter !f_myfilter" to list routes that would be rejected. I'd like to display routes rejected in a pipe protocol between two routing tables so I still have all routes that are rejected by filter in BIRD. Kind regards Matej Vadnjal Arnes