RE: [sv-ec] Semantics of anonymous_program

Dave,
Thanks for your reply.
So it seems anonymous program block is actually not required in a design.
But even if someone writes this and declare a class (C) within it, then what
will be way of access?
Is it
P::C
where P is the name of the package.
If that is true then can we assume we can't do declarations with same name
in two different anonymous program blocks within a package.
 
Thanks
Kausik
 

 
  _____  

From: owner-sv-ec@eda.org [mailto:owner-sv-ec@eda.org] On Behalf Of Rich,
Dave
Sent: Friday, February 18, 2005 1:18 PM
To: kausikd@cal.interrasystems.com; Sv-Ec
Subject: RE: [sv-ec] Semantics of anonymous_program



Kausik,

 

The intent was that an anonymous program was used in a package to declare
classes with program semantics. But it's not clear to me that this construct
is actually needed. My interpretation is that is only matters where the
class handle is instantiated. Given that we have parameterized classes, you
can't generate the code for a class until the parameters have been
elaborated; therefore that's where you decide if event controls get
scheduled in the reactive region or active region. Given the example below,
there are two counters, M.C1.counter, and P.C2.counter, being scheduled to
increment in the active and reactive regions respectively.

 

Dave

 

 

package P;

  class C;

  int counter;

  task start_counter(const ref bit clock);

    forever @(posedge clock) counter = counter + 1;

  endtask

  endclass

endpackage

module M;

  import P::C;

  bit clk;

  always #10 clk++;

  C C1 = new;

  initial C1.start_counter(clk);

  //C1.counter increments scheduled in the active region

endmodule

 

program P;

  import P::C;

  C C2;

  initial C2.start_counter(M.clk);

  //C2.counter increments scheduled in the reactive region

endprogram

 

 

 

  _____  

From: owner-sv-ec@eda.org [mailto:owner-sv-ec@eda.org] On Behalf Of Kausik
Datta
Sent: Thursday, February 17, 2005 10:15 PM
To: Sv-Ec
Subject: [sv-ec] Semantics of anonymous_program

 

 

Hi, 
In SV3.1a LRM at BNF section A.1.10 there is a reference of
anonymous_program 

A.1.10 Package items 
package_item ::= 
package_or_generate_item_declaration 
| specparam_declaration 
| anonymous_program 
| timeunits_declaration 

But in the LRM there is not a single sentence for the purpose and the usage
of this construct. 
Can anyone help me in understanding the usage and semantics of this. 

Thanks 
Kausik Datta 

 

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