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Forums > Functional Verification > SystemVerilog

Subject: Hierarchial Access of Class Objects
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vaas_m
Posts: 2
Online: User is Offline
8/31/2007 3:19 AM  
Hi all,
I am trying to access the method in my class hierachially. But the tool is reporting that hierarchial access to dynamic objects is not supported. I am using LDV5.8. Which version of the LDV supports SV properly. Does I need to have any special licence to upgrade from one version to other.
Thanks,
Sreenivas
stephenh
Posts: 77
Online: User is Offline
8/31/2007 3:58 AM  
Hi Sreenivas

Which exact version of IUS are you using (paste the results of "ncsim -version")?
I tried the following example in IUS 5.83s9 and in IUS 6.11s3 and it works fine.
If this example isn't close enough to what you're trying, please can you paste a better description of the problem?


module tb;
 
class a_c;
  rand int a;
  task print;
    $display("%m : a_c.a == %d", a);
  endtask
endclass
 
class b_c;
  rand a_c a_i;
  task print;
    if (a_i != null) a_i.print();
    else $display("Cannot print a_i - it is null");
  endtask
endclass
 
class c_c;
  rand b_c b_i;
  task print;
    if (b_i != null) b_i.print();
    else $display("Cannot print b_i - it is null");
  endtask
endclass
 
c_c c_i = new;
 
initial begin
  c_i.b_i = new();
  c_i.b_i.a_i = new();
  c_i.print();
  c_i.b_i.a_i.print();
end
 
endmodule
Steve H.
vaas_m
Posts: 2
Online: User is Offline
9/03/2007 3:06 AM  
Hi Steve,
I am using LDV 5.83-p003. I have a verilog module in which my classes are defined. When I am trying to call the methods of my the classes I am getting an error. (Ex: tb.U_model.class_obj.task_name )
ajeetha
Posts: 97
Online: User is Offline
9/03/2007 9:52 PM  
Posted By vaas_m on 9/03/2007 3:06 AM
Hi Steve,
I am using LDV 5.83-p003. I have a verilog module in which my classes are defined. When I am trying to call the methods of my the classes I am getting an error. (Ex: tb.U_model.class_obj.task_name )

Srinivas,
   My guess is that you have not constructed the class object before calling the task. Can you take Steve's example code and modify as per your need and see if you can reproduce the problem? As far as I see it should work - provided the class objects are new'ed before calling tasks.

Cheers
Ajeetha, CVC
www.noveldv.com
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Forums > Functional Verification > SystemVerilog > Hierarchial Access of Class Objects


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