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 = ...
            // lo = ...
            hi = xin[7:4];
            lo = xin[3:0];

        end
    endtask
    // -------------------------------------

    reg [3:0] hi_n, lo_n;

    always @* begin
        // TODO: call the task and build y
        swap_nibbles(x, hi_n, lo_n);
        y = {lo_n, hi_n};
    end

endmodule