tests/opt/opt_share_mux_tree.v

   1 module opt_share_test(
   2   input [15:0]      a,
   3   input [15:0]      b,
   4   input [15:0]      c,
   5   input [1:0]       sel,
   6   output reg [15:0] res
   7   );
   8
   9   always @* begin
  10     case(sel)
  11       0: res = a + b;
  12       1: res = a - b;
  13       2: res = a + c;
  14       default: res = 16'bx;
  15     endcase
  16   end
  17
  18 endmodule