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
);
    always @* begin
    case (mode)
        3'b000: y = x;                  // → PASS
        3'b001: y = (x << sh) & 8'hFF;  // → LSL (logical left)
        3'b010: y = (x >> sh);          // → LSR (logical right)
        3'b011: y = $signed(x) >>> sh;  //  → ASR (arithmetic right, sign-extend)
        3'b100: y = ((x << sh) | (x >> (8 - sh))) & 8'hFF;   // → ROL (rotate left)
        3'b101: y = ((x >> sh) | (x << (8 - sh))) & 8'hFF;   // → ROR (rotate right)
        // 3'b110: y = x;
        // 3'b111: y = x;   // → reserved (treat as PASS in reference)
        default: y = x;  // → reserved (treat as PASS in reference)
    endcase
    end

endmodule