def instruction_BGE(self, opcode, ea):
        """
        Causes a branch if the N (negative) bit and the V (overflow) bit are
        either both set or both clear. That is, branch if the sign of a valid
        twos complement result is, or would be, positive. When used after a
        subtract or compare operation on twos complement values, this
        instruction will branch if the register was greater than or equal to the
        memory register.

        source code forms: BGE dd; LBGE DDDD

        CC bits "HNZVC": -----
        """
        # Note these variantes are the same:
        #    self.N == self.V
        #    (self.N ^ self.V) == 0
        #    not operator.xor(self.N, self.V)
        if self.N == self.V:
#            log.info("$%x BGE branch to $%x, because N XOR V == 0 \t| %s" % (
#                self.program_counter, ea, self.cfg.mem_info.get_shortest(ea)
#            ))
            self.program_counter.set(ea)