/*
    Decoder / Encoder
*/

module decoder_3bit (
    input [2:0] in,
    output [7:0] out
);
    assign out = 1 << in;
endmodule

module encoder_3bit(
    input [7:0] in,
    output reg [2:0] out
);
    always @(*) begin
        out = 0;

        casez(in) 
            8'b1???????: out = 3'd7;
            8'b01??????: out = 3'd6;
            8'b001?????: out = 3'd5;
            8'b0001????: out = 3'd4;
            8'b00001???: out = 3'd3;
            8'b000001??: out = 3'd2;
            8'b0000001?: out = 3'd1;
            8'b00000001: out = 3'd0;
        endcase
    end
endmodule