BTF minutes, Nov 1 2004

From: Steven Sharp (sharp@cadence.com)
Date: Mon Nov 01 2004 - 14:33:48 PST

  • Next message: Shalom.Bresticker@freescale.com: "Re: Proposal for a 'wone' net type"

    Minutes of BTF meeting on Nov 1, 2004, 10:45 AM PDT.

    In attendance:
            Steven Sharp
            Francoise Martinolle
            Stuart Sutherland
            Mark Hartoog
            Kathy McKinley
            Brad Pierce
            Don Mills

    Group agrees to consider IEEE patent policy read.

    Meeting minutes approved. Mark abstains. Passes.

    Proposal for 547. Brad opposes. Passes.

    Proposal 354, with amendments to insert "integer code;" and add semi-colon
    to usage. Use correct bolding in text. Also add to list of File I/O
    tasks at beginning of section. Nobody opposes. No abstains. Passes.

    Discussion of wone proposal:

    There was technical discussion of what was being proposed. The question
    was raised whether the nets should be required to have exactly one
    driver, or just no more than one driver. Kathy maintained that the
    proposal should match the restrictions on SV logic variables, and the
    VHDL ulogic type. Another question was what to do with tran and tranif
    bidirectional switches. Possibilities include treating their terminals
    as a single driver, or just not allowing them to be connected to these
    single-driver nets. Unidirectional switch terminals (nmos and pmos)
    can be treated as drivers.

    Question was raised whether this should be done in 1364 versus the SV-BC.
    Kathy responded that Matt Maidment was aware of this proposal and agreed
    that it should go to 1364. Also some discussion of how the text fits
    better into the 1364 LRM.

    Straw poll of whether we should add this functionality. It passed, but
    with some reservations. Brad wanted to have the port directions enforced
    on wone, to be more like logic variable ports. Kathy felt that this was
    not orthogonal with existing net types, and was beyond the scope of the
    proposal. Mark was concerned that wone might have unforeseen interactions
    with SystemVerilog. Others felt that this should not add any new
    interactions beyond those already existing for nets.

    Another poll was conducted on the preferred keyword to be used for the
    new net type (since the proposed "wone" was not universally popular).
    Alternatives considered were "wone", "uwire", "wireu" and "ulogic".
    In the end, "uwire" was preferred.

    Meeting adjourned at 12:45. Next meeting is in two weeks, Nov 15.

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