iverilog/ivtest/gold/udp_bx.gold

                   0 CL = 0, D = 1, Q = 0
                  10 CL = x, D = 1, Q = x
                  20 CL = 0, D = 1, Q = 0
                  30 CL = x, D = 1, Q = x
                  40 CL = 1, D = 1, Q = x
                  50 CL = 1, D = 1, Q = 1