70. Universal Barrel Shifter

solve it

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;                        
            3'b001: y = x << sh;                  
            3'b010: y = x >> sh;                 
            3'b011: y = $signed(x) >>> sh;       
            3'b100: y = (x << sh) | (x >> (8 - sh)); 
            3'b101: y = (x >> sh) | (x << (8 - sh)); 
            default: y = x;                    
        endcase
    end
endmodule