Subject: Re: Proposals for change to 1164
From: John Michael Williams (jwill@AstraGate.net)
Date: Fri Jun 01 2001 - 20:16:40 PDT
Hi Peter.
Peter J. Ashenden wrote:
>
> Dear colleagues,
>
> I have updated the P1164 web pages at www.eda.org/vhdl-std-logic to
> include a list of proposals for changes to the standard. At the meeting
> in February, those present suggested prioritizing proposals into three
> categories:
>
> - easy (address in the 2001 revision)
> - hard (defer to after the 2001 round)
> - defer pending coordination with other standards
>
> A first cut allocation of proposals to categories is included in the
> minutes of that meeting. Based on that, here is a more complete
> prioritization. (Note that this is a priority for considering the
> proposals, and does not imply that the proposals will be implemented.)
>
> Easy:
>
> CP-001 Uncomment xnor operators
> CP-002 Add shift operators for vector types
> CP-003 Add array/scalar logical operators
> CP-005 Make vector result subtypes same as 1076 operators
> CP-006 Add logical reduction operations (but not operators)
> CP-007 Provide text I/O package for standard logic
> (Note: Steve Bailey investigating donation of
> packages by Synopsys)
This would be a good idea, if there were no strings attached.
We would want Synopsys to donate as well a nonexclusive license
to any of their patents possibly infringed by a standards user
of the donated material. If there are no relevant patents,
then this would be a nonissue.
In my opinion, IEEE never should require anything
in a standard implying any licensing obligation to
a third party (such as would be Synopsys). The temptation
into corruption would be too strong, and corruption
would be there in appearance even if not in reality.
>
> Hard:
>
> CP-004 Add capacitive drive strength
>
> Defer pending coordination:
>
> CP-006 Add logical reduction operators
> (coordinate with 1076 and 1076.3)
> CP-008 Provide formatted I/O with selection of radix
> (coordinate with 1076 to provide for bit_vector also)
> CP-009 Provide 'image attribute
> (coordinate with 1076 to provide for
> all composite types)
>
> If you would like to add proposals to the list, please feel free to post
> them to vhdl-std-logic@eda.org for discussion. I would invite you to
> nominate which of the above categories any new proposals should go in.
> In order to keep to an achievable schedule, I would like to place a
> cut-off date of Friday 15 June for any proposals to be considered for
> the 2001 revision. We can then nail down the "easy" list at the DAC
> meeting (to be ratified by email).
>
> I would also welcome discussion of the proposals already on the list.
> Are they prioritized into the right categories? Are the proposed
> solutions ok?
>
> Cheers,
>
> PA
>
> --
> Dr. Peter J. Ashenden peter@ashenden.com.au
> Ashenden Designs Pty. Ltd. www.ashenden.com.au
> PO Box 640 Ph/Fax: +61 8 8370 9106
> Stirling, SA 5152 Mobile: +61 414 70 9106
> Australia
--
John
jwill@AstraGate.net
John Michael Williams
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