systemverilog functional coverage with argument

    covergroup cg_multi_layer (ref int layer0_index, int layer1_index, input int size);

      cp_layer0: coverpoint layer0_index {

        bins id[]={[0:size]};

      }

      cp_layer1: coverpoint layer1_index {

        bins id[]={[0:size]};

      }

      cx_layers : cross cp_layer0, cp_layer1;

    endgroup

在new function中，準備所需要的sequence queue， 然後random

seq_q.push_back("xxx0"); ...

layer[0] = $urandom_range(seq_q.size()-1, 0);

layer[1] = $urandom_range(seq_q.size()-1, 0);

cg_multi_layer = new(layer[0], layer[1], seq_q.size()-1);  // 也可以使用string表示