Re: [sv-bc] Query related with associative array assignment.

From: Surya Pratik Saha <spsaha_at_.....>
Date: Fri Nov 27 2009 - 01:18:59 PST

Hi Shalom,
I think then it is a mantis-able item and LRM needs correction as different standard tools understand it differently. Please confirm.

Regards
Surya

-------- Original Message  --------
Subject: Re:[sv-bc] Query related with associative array assignment.
From: Bresticker, Shalom <shalom.bresticker@intel.com>
To: Dhiraj Kumar Prasad <dhiraj@cal.interrasystems.com>, sv-bc@server.eda.org <sv-bc@eda.org>
Date: Thursday, November 26, 2009 9:33:43 PM

I think "same type" here should mean "matching type", as 6.22 in 1800-2009 says,

"Some constructs and operations require a certain level of type compatibility for their operands to be legal.
There are five levels of type compatibility, formally defined here: matching, equivalent, assignment compatible, cast compatible, and nonequivalent.

SystemVerilog does not require a category for identical types to be defined here because there is no construct in the SystemVerilog language that requires it. For example, as defined below, int can be interchanged with bit signed [31:0] wherever it is syntactically legal to do so."

So "matching" is the highest level of type compatibility.

Shalom


  

-----Original Message-----
From: owner-sv-bc@server.eda.org 
[mailto:owner-sv-bc@server.eda.org] On Behalf Of Dhiraj Kumar Prasad
Sent: Thursday, November 26, 2009 5:22 AM
To: sv-bc@server.eda.org
Cc: Dhiraj Kumar Prasad
Subject: [sv-bc] Query related with associative array assignment.

Hello,

I have a query related with associative array assignment.

According to LRM P1800-2005,section 5.11

"Associative arrays can be assigned only to another 
associative array of 
a compatible type and with the
 same index type."

So same type don't include equivalent type??

Does the following testcase should pass ??

Testcase
-------

module top();

typedef bit signed [31:0] bit32;
bit var1[][bit32];
bit var2[][int];

initial
    var1 = var2;
endmodule

As different standard simulator's are behaving in different way.

Regards,
dhiRAj




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