54. Population Count

How do you plan to solve it?

module popcount8(
    input  wire [7:0] in,
    output reg  [3:0] count
);

    integer i;

    always @(*) begin
        count = 4'd0;          // required default initialization

        for (i = 0; i < 8; i = i + 1) begin
            count = count + in[i];
        end
    end

endmodule