BTF minutes for Nov 15, 2004 (amended)

From: Steven Sharp (sharp@cadence.com)
Date: Mon Nov 15 2004 - 19:38:47 PST

  • Next message: Steven Sharp: "Re: BTF minutes, Nov 15, 2004"

    Minutes of BTF meeting on Nov 15, 2004, 10:45 AM PDT.
    (Amended to show that Stuart Sutherland was in attendance)

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

    Group agrees to consider IEEE patent policy read.

    Meeting minutes approved unanimously.

    No formal proposal has been made for the uwire net type. There was
    some discussion of Mark Hartoog's mail about combining uwire with
    SystemVerilog variable ports. A SystemVerilog variable port presumably
    can't port collapse with a net. This means that a signal crossing
    hierarchy may have sections that are variables separating sections
    that are nets. This separation may isolate a net that is multiply
    driven from one that is declared uwire. This prevents the desired
    checking on the full hierarchy of the signal (i.e. the connections
    that are meant to represent a single wire in the physical design).
    The obvious solution is to produce a warning for such uncollapsed
    port connections to variables, like those that the proposal already
    requires for uncollapsed port connections between nets. This warning
    tells the user that the uwire restrictions may not be getting fully
    checked across the hierarchy. This was deemed an adequate solution.
    Given that there is an adequate solution, the 1364 group need not
    worry about what solution P1800 might actually adopt.

    Steven brought up the enhancement for allowing certain system
    functions in constant expressions (enhancement 387). This is the
    most likely of the pending enhancements to be proposed, possibly
    along with some new system functions (enhancement 390). Nobody
    had any issues to raise with this idea.

    Meeting adjourned early. Next meeting is in two weeks, Nov 29.

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