[ibis-macro] Re: AMI BIRD Default Amendment
- From: "Walter Katz" <wkatz@xxxxxxxxxx>
- To: "Bob Ross" <bob@xxxxxxxxxxxxx>
- Date: Fri, 26 Feb 2010 06:50:14 -0500
Bob,
In the modified definition of Default, it was my intention to declare that
Default can always be used instead of Value. We should review the document
to eliminate any inconsistencies with this new rule. I think words like
"Allowed-Value must be Value or Default."
Walter
Walter Katz
303.449-2308
Mobile 720.333-1107
wkatz@xxxxxxxxxx
www.sisoft.com
-----Original Message-----
From: Bob Ross [mailto:bob@xxxxxxxxxxxxx]
Sent: Friday, February 26, 2010 3:01 AM
To: Walter Katz
Cc: IBIS-ATM
Subject: Re: [ibis-macro] AMI BIRD Default Amendment
Walter:
Without getting into other detailed concerns, the proposed Default amendment
as stated is works as applied to the Boolean parameters. I was not clear
that my specific concern is where the amendment does not apply:
Ignore_Bits:
|
| Ignore_Bits is of usage Info and type Integer. Allowed-Value
| must be Value. It tells the
| EDA platform how long the time variant model takes to
complete
| initialization. This parameter is meant for AMI_GetWave
| functions that model how equalization adapts to the input
| stream. The value in this field tells the EDA platform how
| many bits of the AMI_Getwave output should be ignored.
| Examples of Ignore_Bits declaration are:
| (Ignore_Bits (Usage Info)(Type Integer) (Value 100))
It states that Allowed Value MUST be Value. That means any model with
or without Default is syntactically invalid. So the parser developer
will create an Error condition if Value is missing even if Default exists.
We could state that either Value OR Default is required as one option
for Ignore_Bits to resolve this.
Bob
Walter Katz wrote:
> Bob,
>
> My intent was to make it simple and allow Default as an alternative to
Value
> for all parameters, thus eliminating and special code for specific
> parameters. Note that all 5.0 AMI models will work, it just relaxes a rule
a
> little. The recommended way for future models is to use Value instead of
> Default for all parameters, but one will be able to use either Default or
> Value. Note that if there is both Default and Value specified, and since
> Default must be a legal Allowed Value then either the value of Default
must
> equal the value of Value or the Value must me NA.
>
> The following
> Currently Value is required and therefore not identified as a
> parameter which will allow only Default per V5.0. This is also
> rigidly enforced in V5.0 IBIS-AMI. A rule for this case needs to be
> added.
> I disagree that a rule needs to be added for this. True the existing parse
> will need to be modified for the new AMI format, but the existing 5.0 AMI
> files which obey the above rule will still pass the new parser.
>
> Walter
>
> Walter Katz
> 303.449-2308
> Mobile 720.333-1107
> wkatz@xxxxxxxxxx
> www.sisoft.com
>
> -----Original Message-----
> From: Bob Ross [mailto:bob@xxxxxxxxxxxxx]
> Sent: Tuesday, February 23, 2010 8:54 PM
> To: wkatz@xxxxxxxxxx
> Cc: IBIS-ATM
> Subject: Re: [ibis-macro] AMI BIRD Default Amendment
>
> Walter:
>
> Ok, this is a combined amendment where we are also assuming
> that we now can make optional certain parameters in five "boolean"
> keywords. The simple sentence
>
> | If there is no Allowed-Value method, and (Default <value>) is
> specified,
>
> then the
> | only Allowed Value will be <value>.
>
> We need to identify explicitly which parameters support "no
allowed-value".
>
> Specifically we are now creating special case rules for a group of
> "boolean_reserved_parameters" where we can optionally omit either or both
> Value and Type.
>
> Init_Returns_Impulse | || Required || first 5 are boolean
> parameters
> GetWave_Exists | || Required
> Use_Init_Output |
>
> Init_Returns_Filter | || New
>
> Max_Init_Aggressors |
>
> Page 144 of the spec also applies to Ignore_Bits, of Type Integer.
>
> Ignore_Bits | || Type Integer, different rules
>
> Currently Value is required and therefore not identified as a
> parameter which will allow only Default per V5.0. This is also
> rigidly enforced in V5.0 IBIS-AMI. A rule for this case needs to be
> added.
>
> Bob
>
> I still object to making some of the syntax optional, but that
> will be on my issues to be resolved/discussed list.
>
>
> Walter Katz wrote:
>
>>All,
>>
>>
>>
>>I am enclosing a ?Default Amendment?, that should allow IBIS 5.0 ami
>>files to be legal in the revised standard by allowing Default to be
>>specified without having an Allowed Value field. In effect, Default
>>becomes an alternative way of saying Value.
>>
>>
>>
>>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
>
>
--
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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