RE: $arandom/$rdist_ seeds

I don't think a Mantis was ever filed.

In SV-2012, there is no formal BNF for the seeds, just a textual description.

For $random and $dist_*, you have

"random_function ::= $random [ ( seed ) ]
dist_functions ::=
        $dist_uniform ( seed , start , end )
        ..."

"The seed argument shall be an integral variable."

and for $urandom, you have

"The syntax for $urandom is as follows:
        function int unsigned $urandom [ (int seed ) ] ;

... The seed can be any integral expression."

Shalom

> -----Original Message-----
> From: owner-verilog-ams@eda.org [mailto:owner-verilog-ams@eda.org] On
> Behalf Of Paul Floyd
> Sent: Saturday, June 02, 2012 23:37
> To: Dave Miller
> Cc: verilog-ams@eda-stds.org
> Subject: Re: $arandom/$rdist_ seeds
>
> Dave Miller wrote:
> > Hi Paul, Shalom,
> > yes, that was silly of me, not sure what I was thinking. Of course I
> > can have -ve numbers as it is just an expression of a unary operator
> > followed by a number.
> >
> > So the change then is just the definition of analog_random_seed to
> > include the sign
> >
> > analog_random seed ::=
> > integer_variable_identifier
> > | reg_variable_identifier
> > | time_variable_identifier
> > | integer_parameter_identifier
> > | [ sign ] decimal_number
> >
> >
> > Same sort of change for seed in the rdist functions. Also the
> > description of the data for table model references decimal_number
> > directly so it should also be updated.
> >
> > If you like, I will add a Mantis item for this.
> Yes, please.
>
> Regards
> Paul
> --
> Dr Paul Floyd
> Mentor Graphics Corporation

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Received on Sat Jul 21 23:24:08 2012