Re: [sv-bc] Array query functions on interface port and instance array

From: Surya Pratik Saha <spsaha_at_.....>
Date: Thu Aug 13 2009 - 02:57:23 PDT

Hi Shalom,
But I don't see any reference in the LRM that allows array query functions on interface port or instance array. Unapacked array section does not include interface port or instance array. Please help me if I miss any part in the LRM.

Regards
Surya

-------- Original Message  --------
Subject: Re:[sv-bc] Array query functions on interface port and instance array
From: Bresticker, Shalom <shalom.bresticker@intel.com>
To: Surya Pratik Saha <spsaha@cal.interrasystems.com>, sv-bc@eda.org <sv-bc@eda.org>
Cc: Sourasis Das <sourasis@cal.interrasystems.com>
Date: Thursday, August 13, 2009 3:20:44 PM

Your failures seem to be tool limitations, not language restrictions.

Shalom 


  

SV 2009 draft 7a LRM has described array query functions in 
"20.7 Array 
querying functions" which uses reference of clause 7 where 
the unpacked 
array is defined. The clause 7 defines unpacked arrays of 
different data 
types. But it is not clear what will be the expected behavior 
of array 
query functions if they are applied on instance array of 
interface port 
array. For the following case what will be the expected behavior?

interface a;
endinterface
module test(in1,in2,out);
input [7:0] in1,in2;
output reg [7:0]out;

a a[3:0]();
assign out = $size(a);
bottom inst(a);
endmodule

module bottom(a a[4]);
byte out;
assign out = $size(a);
endmodule

Some simulators fail and some pass for the above case.
    

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