UVM中的utility宏

UVM中所有的對(duì)象都應(yīng)該在factory 中注冊(cè)， utility 宏就是用于將對(duì)象注冊(cè)到工廠的。

Utility Macros

utils宏主要用于將object或 component 注冊(cè)到工廠，它需要在每個(gè)從uvm_object派生的用戶定義類中使用，包括所有類型的sequenceitems 和 components 。

ObjectUtility

所有直接從uvm_object或uvm_transaction派生的類都需要使用`uvm_object_utils宏進(jìn)行注冊(cè)。對(duì)于每個(gè)類，都必須顯式定義new函數(shù)，并將類實(shí)例的名稱作為參數(shù)。

class ABC extends uvm_object; 
 
  // Register this user defined class with the factory 
  `uvm_object_utils(ABC) 
 
  function new(string name = "ABC"); 
    super.new(name); 
  endfunction 
endclass

Component Utility

所有直接或間接從uvm_component派生的類都需要使用`uvm_component_utils宏將它們注冊(cè)到工廠。對(duì)于每個(gè)直接或間接從uvm_component派生的類，都必須顯式定義new函數(shù)，并將類實(shí)例的名稱和實(shí)例化此對(duì)象的父類的句柄作為參數(shù)。

class DEF extends uvm_component; 
 
  // Class derived from uvm_component, register with factory 
  `uvm_component_utils(DEF) 
 
  function new(string name = "DEF", uvm_component parent=null); 
    super.new(name, parent); 
  endfunction 
endclass

factory注冊(cè)后的類對(duì)象創(chuàng)建

建議通過調(diào)用type_id::create()方法來創(chuàng)建所有類對(duì)象已促進(jìn)驗(yàn)證平臺(tái)的靈活性和可重用性。

class ABC extends uvm_object; 
  `uvm_object_utils(ABC) 
 
  function new(string name = "ABC"); 
    super.new(name); 
  endfunction 
endclass 
 
class base_test extends uvm_test; 
  `uvm_component_utils(base_test) 
 
  function new(string name = "base_test", uvm_component parent=null); 
    super.new(name, parent); 
  endfunction 
 
  virtual function void build_phase(uvm_phase phase); 
 
    // An object of class "ABC" is instantiated in UVM by calling 
    // its "create()" function which has been defined using a macro 
    // as shown above 
    ABC abc = ABC::create("abc_inst"); 
  endfunction 
endclass

審核編輯：湯梓紅