题解 | #含有无关项的序列检测#

  reg [8:0] list;

 always@(posedge clk ,negedge rst_n)
    if(!rst_n)
        begin
           list <= 9'd0;
        end
    else
          list <= {list[7:0],a};

always@(posedge clk ,negedge rst_n)
    if(!rst_n)
        begin
             match <= 0;
        end
    else
        casex(list)
             9'b011xxx110:match <= 1;
             default:match <= 0;
        endcase