RE: [sv-cc] VPI interface of unsized literals

Jason,
 
To the best of my knowledge, the standard has not yet determined
how VPI should represent unbased, unsized literals.  I have used
your e-mail to file an Enhancement request in the committee's
data base.
 
At the present time, I would guess that most implementations
will represent it as a vpiConstant, but how they distinguish
that from other constants -- or even if they distinguish it
-- will be implementation-dependent.
 
I cannot speak on behalf of the whole committee, so the above is
just my opinion.
 
Regards,
Jim Vellenga
 

---------------------------------------------------------
James H. Vellenga                            978-262-6381
Software Architect                              (FAX) 978-262-6636
Cadence Design Systems, Inc.         vellenga@cadence.com
270 Billerica Rd
Chelmsford, MA 01824-4179
"We all work with partial information."
---------------------------------------------------------- 

 


________________________________

	From: owner-sv-cc@eda.org [mailto:owner-sv-cc@eda.org] On Behalf
Of Jason Campbell
	Sent: Friday, October 24, 2008 11:16 AM
	To: 'SV-CC'
	Subject: [sv-cc] VPI interface of unsized literals
	
	

	Hi,

	 

	If I use '1 in an expression, what is the type of this constant
returned by VPI?

	 

	When I get the value is it 1 or does it expand to the
appropriate size and return 15

	for example?

	 

	My opinion is that the type should be something like
vpiUnsizedConstant and the

	return value should return only the single bit, 0, 1, z, x.

	 

	Thanks,

	 

	Jason Campbell


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