1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
module ifdef_2_top(o1, o2, o3); output wire o1; `define COND_1 `define COND_2 `define COND_3 `ifdef COND_1 output wire o2; `elsif COND_2 input wire dne1; `elsif COND_3 input wire dne2; `else input wire dne3; `endif output wire o3; endmodule