RE: [sv-bc] Query related with signedness of variable.

This seems to be the same question that was discussed in the thread, "Sign of a signed packed array of struct," starting in http://www.eda.org/sv-bc/hm/10532.html. I don't think that thread was ever conclusively resolved.

Regards,
Shalom

> -----Original Message-----
> From: owner-sv-bc@eda.org [mailto:owner-sv-bc@eda.org] On Behalf Of
> Dhiraj Kumar Prasad
> Sent: Tuesday, March 22, 2011 3:59 PM
> To: sv-bc@server.eda.org
> Cc: Dhiraj Kumar Prasad
> Subject: [sv-bc] Query related with signedness of variable.
>
> Hello,
>
> I have a query related with signedness of a variable.
>
> In following example
>
> module test();
>
> typedef struct packed signed {
> bit [1:0] bit1;
> }[1:0]S1;
> S1 var1;
> int i;
> initial
> begin
> var1[0] = 2'b10;
> i = var1[0];
> end
> endmodule
>
> Value of i should be 32'b11111111111111111111111111111110 or
> 32'b00000000000000000000000000000010.
>
> Different standard simulator are behaving differently.
>
> Should the equivalent of struct be like
>
> typedef bit signed [1:0] b1;
> typedef b1[1:0] b2;
>
> or
> typedef bit signed [1:0][1:0] b2;
>
> Regards,
> dhiRAj

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