[ibis-macro] Re: TreeRootName at the end of IBIS file in BIRD117
- From: "Todd Westerhoff" <twesterh@xxxxxxxxxx>
- To: <ibis-macro@xxxxxxxxxxxxx>
- Date: Tue, 3 Apr 2012 08:38:30 -0400 (EDT)
Arpad,
Are you suggesting that an .ami file could have multiple roots?
Todd.
Description: cid:EAFF2D52-4B63-4A05-9D24-B96BE375B7E0@eau.wi.charter.com
Todd Westerhoff
VP, Software Products
Signal Integrity Software Inc. . <http://www.sisoft.com/> www.sisoft.com
6 Clock Tower Place . Suite 250 . Maynard, MA 01754
(978) 461-0449 x24 . <mailto:twesterh@xxxxxxxxxx> twesterh@xxxxxxxxxx
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From: ibis-macro-bounce@xxxxxxxxxxxxx
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Muranyi, Arpad
Sent: Monday, April 02, 2012 7:42 PM
To: ibis-macro@xxxxxxxxxxxxx
Subject: [ibis-macro] Re: TreeRootName at the end of IBIS file in BIRD117
Fangyi,
Thanks for your comments. I can kind of see your point, but
I don't think your suggestion would have as many capabilities
as the proposed syntax in this BIRD draft.
The TreeRootName syntax allows the usage of multiple trees in
the same file (.ibs or .par, or even .ami). Also, the proposed
Dependency Table would allow more than just a list of values
for the parameter assignments. In addition, if we used the
TreeRootName syntax for the .ami and .par files, but another
syntax for the .ibs files, we would have to invent more new
syntax that is not there yet in .ibs files. Is that worth it?
I think the simplicity of using the same syntax for the parameter
assignment whether the value comes from within the .ibs file or
any external files is good. Is there a specific reason you
DON'T want that?
Thanks,
Arpad
=================================================================
From: ibis-macro-bounce@xxxxxxxxxxxxx
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of
fangyi_rao@xxxxxxxxxxx
Sent: Monday, April 02, 2012 6:03 PM
To: ibis-macro@xxxxxxxxxxxxx
Subject: [ibis-macro] TreeRootName at the end of IBIS fiel in BIRD117
Hi, Arpad;
I don't think the parameter definition section pointed to by TreeNodeName
at the end of the .ibs file is necessary in BIRD117 (page 6).
http://www.vhdl.org/pub/ibis/macromodel_wip/archive/20120327/arpadmuranyi/
BIRD%20117.4%20update%20draft%201/BIRD117_4_draft1.pdf
By defining the parameter at the end of the ibis file you are not
importing it from an external file. Then why do we still need to
indirectly specify the value by using TreeRootName instead of directly
assigning the value to the parameter? The only argument I heard is that
the TreeRootName way allows multiple values to be specified for a
parameter. But I think it's a hack for TreeRootName. I'd rather introduce
a formal List syntax to address this issue.
Regards,
Fangyi
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