62. Nibble Swap

How do you plan to solve it?

module nibble_swap_task (
    input  [7:0] x,
    output reg [7:0] y
);
    // ---------- Write this task ----------
    task swap_nibbles;
        input  [7:0] xin;
        output [3:0] hi;
        output [3:0] lo;
        begin
            // TODO: assign hi and lo from xin
             hi = xin[7:4];
             lo = xin[3:0];
        end
    endtask

    reg [3:0] hi_nib, lo_nib;

    always @* begin
        swap_nibbles(x,hi_nib,lo_nib);
        y={lo_nib,hi_nib};
    end

endmodule