[sv-bc] Re: [sv-ec] RE: [sv-ac] Is explicit covergroup variable declaration illegal inside class?

From: Surya Pratik Saha <spsaha@cal.interrasystems.com>
Date: Thu Jan 21 2010 - 02:05:35 PST

Hi Shalom,
But does that text mean to give error of an explicit covergroup variable declaration at compilation time? I don't think so.

Regards
Surya

-------- Original Message  --------
Subject: [sv-ec] RE: [sv-ac] Is explicit covergroup variable declaration illegal inside class?
From: Bresticker, Shalom <shalom.bresticker@intel.com>
To: Surya Pratik Saha <spsaha@cal.interrasystems.com>, sv-bc@eda.org <sv-bc@eda.org>, sv-ac@server.eda.org <sv-ac@eda.org>
Cc: SV_EC List <sv-ec@eda.org>
Date: Thursday, January 21, 2010 2:56:54 PM

Surya,

Questions on covergroups should go to sv-ec.
Please make sure your questions go to the appropriate committee.

Subclause 19.4 (Using covergroup in classes) explains:

"In class xyz, defined below, members m_x and m_y are covered using an embedded covergroup:

class xyz;
bit [3:0] m_x;
int m_y;
bit m_z;

covergroup cov1 @m_z; // embedded covergroup
	coverpoint m_x;
	coverpoint m_y;
endgroup

	function new(); cov1 = new; endfunction
endclass

In this example, data members m_x and m_y of class xyz are sampled on every change of data member m_z.

A covergroup declaration within a class is an embedded covergroup declaration. An embedded covergroup declaration declares an anonymous covergroup type and an instance variable of the anonymous type. The covergroup_identifier defines the name of the instance variable. In the above example, a variable cov1 (of the anonymous coverage group) is implicitly declared."

Regards,
Shalom


  

-----Original Message-----
From: owner-sv-ac@eda.org [mailto:owner-sv-ac@eda.org] On 
Behalf Of Surya Pratik Saha
Sent: Thursday, January 21, 2010 9:33 AM
To: sv-bc@eda.org; sv-ac@server.eda.org
Subject: [sv-ac] Is explicit covergroup variable declaration 
illegal inside class?

For the following case:
class test;
  covergroup cg;
  endgroup

  cg c1;
  function new();
      c1 = new;
  endfunction
endclass

All the standard simulators fail for 'c1' declaration. But I 
could not 
find anything in the SV 2009 LRM restricting that.
    

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