Re: Using CTL formula involving non constant or latch signals

From: Roderick Bloem (roderick.bloem@colorado.edu)
Date: Mon May 21 2001 - 10:28:40 MDT

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    Laurent,

    The restriction allows vis to effectively delete the input in some
    cases, which leads to improved efficiency. The workaround consists of
    latching the input. See question 8 of the FAQ at
    http://vlsi.colorado.edu/~vis/doc/html/vis-faq.html.

    Let us know if you have any more problems.

    Roderick Bloem

    Laurent Arditi wrote:
    >
    > I doing some experiments with VIS version 1.4 and getting stopped
    > by the following problem:
    >
    > CTL formula containing signals driven by primary inputs
    > are not accepted. The error message says only constants
    > and latchs can drive those signals.
    > This is also clearly written in the documentation of model_check:
    > "Note that the support of any wire referred to in a formula should
    > consist only of latches."
    >
    > I don't understand this restriction. What would be the workaround, if
    > any ?
    >
    > --
    > ============================================================ |\/\/\/|
    > Laurent Arditi Texas Instruments. MS. 21, BP 5 | |
    > Email: larditi@ti.com 06271 Villeneuve-Loubet Cedex ( O O )
    > Tel: +33 (0)4 9322 2856 FRANCE | o |



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