70. Universal Barrel Shifter

How do you plan to solve it?

/*Write your code here*/
module univ_barrel8 (
    input [7:0] x,
    input [2:0] sh,
    input [2:0] mode,
    output reg [7:0] y
);
    localparam [2:0]
        M_PASS = 3'b000,
        M_LSL = 3'b001,
        M_LSR = 3'b010,
        M_ASR = 3'b011,
        M_ROL = 3'b100,
        M_ROR = 3'b101;
    always @* begin
        case (mode)
            M_PASS: y = x;
            M_LSL : y = (x << sh) & 8'hFF;
            M_LSR : y = (x >> sh);
            M_ASR : y = $signed(x) >>> sh;
            M_ROL : y = ((x << sh) | (x >> (8 - sh))) & 8'hFF;
            M_ROR : y = ((x >> sh) | (x << (8 - sh))) & 8'hFF;
            default: y = x;
        endcase
    end
endmodule