RE: [sv-bc] Array of instance passed with modport

Surya,

Is a modport a subtype operation that acts on the interface type? -- for example, if I wanted to pass only one modport "slave" of an array of interfaces "servers", would the syntax be

     bottom bot ( servers.slave[4] ) ;

not

     bottom bot ( servers[4].slave ) ;

? I don't see an example of this in the 2005 LRM, although there is something similar at the end of 20.4.4  using the generate construct. (On the other hand, see

     http://www.eda-stds.org/sv-bc/hm/4256.html
     http://www.eda-stds.org/sv-bc/hm/4303.html )

But would this subtype viewpoint still work with arrays of  virtual interfaces? I don't see any examples of arrays of virtual  interfaces in the LRM -- is there any reason to think that if one element had a modport "slave", then they all would?

-- Brad




________________________________________
From: owner-sv-bc@eda.org [owner-sv-bc@eda.org] On Behalf Of Surya Pratik Saha [spsaha@cal.interrasystems.com]
Sent: Tuesday, December 02, 2008 3:10 AM
To: sv-bc@eda.org
Subject: [sv-bc] Array of instance passed with modport

Hi,
I want to connect an array of instance with a module having array of
interface port. But along with that, actually I want to connect modport
there. How do I do that. If I write following case:

interface I(in1,in2,out);
    input  in1,in2;
    output reg out;
    modport m1(input in1,input in2,output out);
endinterface

module middle(I A[7:0]  ,output out1);
endmodule

module top(input [7:0]in1,in2,output [7:0]out,out1);
    I I1 [7:0] (in1,in2,out);
    middle m1(I1.m1,out1); // Is I1.m1 is valid hierarchical reference?
Should it not require selection of array index
endmodule

Different simulators behave differently here, some pass, some fail due
to not using selection of array index. If it needs a modport array, how
do I declare that? I did not see anything in the LRM?

--
Regards
Surya




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