基本スコアボードのサンプル

`timescale 1ps/1ps

module tb_top;

  `include "data_item.sv"

  `include "c_scrbd.sv"

  c_scrbd #(data_item) _scrbd;

  initial begin

    int i;

    data_item item;

    logic [7:0] data_q[$];

    _scrbd = new();

    fork _scrbd.run(); join_none

    // データ生成

    for(i=0; i<8; i=i+1)begin

      data_q.push_back($urandom_range(255,0));

    end

    for(i=0; i<8; i=i+1)begin

      item = new("EXP");

      item.set_data(i, data_q[i]);

      _scrbd.write_exp(item);

    end

    for(i=0; i<8; i=i+1)begin

      item = new("OBS");

      item.set_data(i, data_q[i]);

      _scrbd.write_obs(item);

    end

    #100 $finish;

  end

endmodule

class c_scrbd #(type T = int);

  string name = "m_scrbd";

  T exp_q[$];

  T obs_q[$];

  function void set_name(string _name);

    name = _name;

  endfunction

  function void write_exp(T item);

    exp_q.push_back(item);

  endfunction

  function void write_obs(T item);

    obs_q.push_back(item);

  endfunction

  virtual task run;

    forever begin

      wait(obs_q.size()!=0);

      if(exp_q[0].compare(obs_q[0]))begin

        $display("%0t [SCRBD] %s compare OK ===================================", $time, name);

        exp_q[0].print;

      end else begin

        $display("%0t [SCRBD] %s compare NG ===================================", $time, name);

        exp_q[0].print;

        obs_q[0].print;

      end

      exp_q.delete(0);

      obs_q.delete(0);

    end

  endtask

endclass

class data_item;

  string name;

  logic [7:0] data0;

  logic [7:0] data1;

  function new (string name="data_item");

    this.name = name;

  endfunction

  function bit compare(data_item item);

    if(data0===item.data0 && data1===item.data1)begin

      return 1;

    end else begin

      return 0;

    end

  endfunction

  function void set_data(logic [7:0] data0, data1);

    this.data0 = data0;

    this.data1 = data1;

  endfunction

  function void print;

    $display("----------------------------------------------------------");

    $display("%0t [%s] data0 : %02xh", $time, name, data0);

    $display("%0t [%s] data1 : %02xh", $time, name, data1);

    $display("----------------------------------------------------------");

  endfunction

endclass