54. Population Count

How do you plan to solve it?

module popcount8 (
    input  [7:0] in,
    output reg [3:0] count
);
    integer i;
    always @* begin
        count = 4'd0;
        for (i = 0; i < 8; i = i + 1) begin
            count = count + in[i];
        end
    end
endmodule