[ibis-macro] Re: (Backus-Naur Form (BNF) of .ami file vs BNF of string in Parameters_In and Parameters_Out
- From: "Walter Katz" <wkatz@xxxxxxxxxx>
- To: <bob@xxxxxxxxxxxxx>, <twesterh@xxxxxxxxxx>
- Date: Wed, 24 Feb 2010 12:07:22 -0500
Bob,
"Is Default AND Value a violation?" I do not care. If someone says Default
and Value then they are just being silly because they need to have same
value anyway.
Walter
Walter Katz
303.449-2308
Mobile 720.333-1107
wkatz@xxxxxxxxxx
www.sisoft.com
-----Original Message-----
From: ibis-macro-bounce@xxxxxxxxxxxxx
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx]On Behalf Of Bob Ross
Sent: Wednesday, February 24, 2010 11:55 AM
To: twesterh@xxxxxxxxxx
Cc: ibis-macro@xxxxxxxxxxxxx
Subject: [ibis-macro] Re: (Backus-Naur Form (BNF) of .ami file vs BNF of
string in Parameters_In and Parameters_Out
Todd and Walter:
Thanks, these formal descriptions are helpful starts and also provide
a cross-check and basis for detailed questions.
I am not aware of any BNF standard since I have seen many different
styles.
I assume that "|" is exclusive OR since 'True False' is a violation.
GetWave_Exists (Value True|False)|(Default True|False)
Is Default AND Value a violation?
Bob
Todd Westerhoff wrote:
> Walter,
>
> I think you're on to something here.
>
> The main issue I keep hearing is that we have trouble spec'ing the .AMI
> file syntax for parser development, whether it be the IBIS parser or EDA
> vendor tools. Having a formal definition of the .AMI syntax in BNF is a
> great idea and, as far as I'm concerned, directly addresses many of the
> problems we've had.
>
> I took a shot at cleaning up the syntax you'd defined - fixed a few of
> the typos and added whitespace for readability. I know the computers
> don't care, but I think whitespace can make it easier for us humans to
> review and discuss.
>
> I think the reserved parameter stuff is reasonably clean, but I suspect
> the model-specific parameter definitions still need work I'm familiar
> with BNF in concept but am most certainly not an expert. If others
> agree this is the way to go, let's enlist the help of someone with more
> BNF experience and get this sorted out.
>
> Todd.
>
> Todd Westerhoff
> VP, Software Products
> SiSoft
> 6 Clock Tower Place, Suite 250
> Maynard, MA 01754
> (978) 461-0449 x24
> twesterh@xxxxxxxxxx
> www.sisoft.com
>
>
> On 2/24/2010 8:35 AM, Walter Katz wrote:
>
>> All,
>>
>>
>>
>> The parameter tree was initially used for the content of the strings
>> in Parameters_In and Parameters_Out. The modified BNF in the IBIS 5.0
>> AMI specification is an accurate representation and therefore an
>> accurate method to parse the strings in Parameters_In and Parameters_Out.
>>
>>
>>
>> The .ami file is also in a parameter tree format, but has additional
>> rules. I do not know how to capture these additional rules in a formal
>> BNF that can be used to programmatically parse a .ami file. I did put
>> the following document together than may very well be misnames a BNF,
>> but I do think graphically documents the parser rules for the update
>> .ami syntax.
>>
>>
>>
>> This follows up on the ideas that Bob suggested in his e-mail to the
>> group on AMI Quick Reference.
>>
>>
>>
>> I think it is useful as is, any suggestions on how to make it more
>> readable, or BNF like would be much appreciated.
>>
>>
>>
>> Walter
>>
>>
>>
>> Walter Katz
>>
>> 303.449-2308
>>
>> Mobile 720.333-1107
>>
>> wkatz@xxxxxxxxxx
>>
>> www.sisoft.com
>>
>>
>>
--
Bob Ross
Teraspeed Consulting Group LLC Teraspeed Labs
121 North River Drive 13610 SW Harness Lane
Narragansett, RI 02882 Beaverton, OR 97008
401-284-1827 503-430-1065
http://www.teraspeed.com 503-246-8048 Direct
bob@xxxxxxxxxxxxx
Teraspeed is a registered service mark of Teraspeed Consulting Group LLC
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