RE: [sv-ec] question mantis 1447

Dave,
 
I agree with you that this part of the proposal is worded in a confusing
way. But regarding 6.6, we already made that change in Mantis 2092. A
sentence could be added to 7.4.2 like, "However, net arrays shall have a
fixed-size (see 6.6)."
 
Note that even net fixed-size arrays can not have all data types. For
example, 2-state data types and reals are not allowed.
 
Shalom


________________________________

	From: owner-sv-ec@server.eda.org
[mailto:owner-sv-ec@server.eda.org] On Behalf Of Rich, Dave
	Sent: Sunday, February 03, 2008 8:05 PM
	To: sv-ec@server.eda.org
	Subject: [sv-ec] question mantis 1447
	
	

	I am reviewing the revised sentence in section 7.4.2 of the
proposal: "Unpacked fixed-size arrays can be made of any data type, and
whereas dynamic arrays, associative arrays and queues can only be made
of variable data types."

	 

	The use of the word "variable" is confusing on a few accounts:

	1.	"Variable" is the antonym of "fixed," and quickly read,
makes me think that you are trying to restrict dynamic arrays to being
made up of variable-sized elements 
	2.	The data types allowed for group of data storage called
Variables is un-restricted, whereas the data types allowed for group of
data storage called Nets is restricted, so what is being restricted
here? 
	3.	It's not possible to specify the element type of an
array as belonging to variables or nets. 

	 

	May I suggest making a friendly amendment and leaving that
sentence in its original form, an making a small modification in 6.6

	 

	Certain restrictions apply to the data type of a net. A valid
data type for a net shall be one of the following:

	a) A 4-state integral type, including a packed array or packed
structure.

	b) An fixed-size unpacked array or unpacked structure, where
each element has a valid data type for a net.

	 

	Dave

	 

	 

	David Rich
	Verification Technologist
	Design Verification & Test Division
	Mentor Graphics Corporation
	dave_rich@mentor.com
	Office:   408 487-7206
	Cell:     510 589-2625

	 


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