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

7.4 says,

"Unpacked arrays are formed from any data type"

Shalom


________________________________
From: Surya Pratik Saha [mailto:spsaha@cal.interrasystems.com]
Sent: Thursday, August 13, 2009 12:57 PM
To: Bresticker, Shalom
Cc: sv-bc@eda.org; Sourasis Das
Subject: Re: [sv-bc] Array query functions on interface port and instance array

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><mailto:shalom.bresticker@intel.com>
To: Surya Pratik Saha <spsaha@cal.interrasystems.com><mailto:spsaha@cal.interrasystems.com>, sv-bc@eda.org<mailto:sv-bc@eda.org> <sv-bc@eda.org><mailto:sv-bc@eda.org>
Cc: Sourasis Das <sourasis@cal.interrasystems.com><mailto: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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