testsuite/synth/module01/tb_fulladder2b.v

   1 module tb_fulladder2b;
   2    reg cin;
   3    reg [1:0] a;
   4    wire [1:0] res;
   5    wire       cout;
   6
   7    fulladder2b dut (.sum(res), .cout(cout), .a(a), .cin(cin));
   8
   9    initial begin
  10       a <= 2'h1;
  11       cin <= 0;
  12       # 1;
  13       $display("res=%b", res);
  14       if (res !== 4'h1 || cout != 0)
  15         $fatal(1, "FAILURE");
  16
  17       cin <= 1;
  18       #1;
  19       $display("res=%b", res);
  20       if (res !== 4'h2 || cout != 0)
  21         $fatal(1, "FAILURE");
  22
  23       $finish;
  24    end
  25 endmodule