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router.v (500B)

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module model #(
    parameter DATA_WIDTH = 32
) (
    input [DATA_WIDTH-1:0] din,
    input din_en,
    input [1:0] addr,
    output logic [DATA_WIDTH-1:0] dout0,
    output logic [DATA_WIDTH-1:0] dout1,
    output logic [DATA_WIDTH-1:0] dout2,
    output logic [DATA_WIDTH-1:0] dout3
);

  assign dout0 = (din_en && addr == 0) ? din : 0;
  assign dout1 = (din_en && addr == 1) ? din : 0;
  assign dout2 = (din_en && addr == 2) ? din : 0;
  assign dout3 = (din_en && addr == 3) ? din : 0;

endmodule