70. Universal Barrel Shifter

How do you plan to solve it?

module univ_barrel8(
    input [7:0] x,
    input [2:0] sh,
    input [2:0] mode,
    output reg [7:0] y
);

    localparam PASS = 3'b000;
    localparam LSL = 3'b001;
    localparam LSR = 3'b010;
    localparam ASR = 3'b011;
    localparam ROL = 3'b100;
    localparam ROR = 3'b101;

    always @(*) begin
        case (mode)
            PASS:      y = x;
            LSL:       y = x << sh;
            LSR:       y = x >> sh;
            ASR:       y = $signed(x) >>> sh;
            ROL:       y = (x << sh) | (x >> (8 - sh));
            ROR:       y = (x >> sh) | (x << (8 - sh));
            default:   y = x;
        endcase
    end

endmodule