Hi Jonathan: The usage you describe aligns with the intuition that I mentioned in an earlier mail to Dave Rich. I also suggested in an earlier mail to Ed Cerny that we might need to ask for SV-BC help on this. I've copied SV-EC and SV-BC. Thanks, John H. > X-Authentication-Warning: server.eda-stds.org: majordom set sender to owner-sv-ac@eda.org using -f > X-VirusChecked: Checked > X-Env-Sender: jonathan.bromley@doulos.com > X-Msg-Ref: server-2.tower-139.messagelabs.com!1162579238!1572853!1 > X-StarScan-Version: 5.5.10.7; banners=-,-,- > X-Originating-IP: [80.229.89.154] > Content-class: urn:content-classes:message > Date: Fri, 3 Nov 2006 18:40:37 -0000 > X-MimeOLE: Produced By Microsoft Exchange V6.0.6603.0 > X-MS-Has-Attach: > X-MS-TNEF-Correlator: > Thread-Topic: [sv-ac] mantis 1550 > Thread-Index: Acb/cJu+3seVPPqhQdumoeAw4YQrIgABjexw > From: "Jonathan Bromley" <jonathan.bromley@doulos.com> > X-Virus-Status: Clean > X-MIME-Autoconverted: from quoted-printable to 8bit by server.eda-stds.org id kA3Iegb2022358 > Sender: owner-sv-ac@eda.org > X-OriginalArrivalTime: 03 Nov 2006 18:44:46.0396 (UTC) FILETIME=[22578FC0:01C6FF78] > > Note that users of clocking blocks already expect to > be able to detect change events on an input clockvar. > This is very, very similar to the detection of events > on $past() or $sampled(). > > I have not been following this discussion as closely > as I should, and I don't have much expertise to > contribute to sv-ac, but I would urge you all to > share this issue with sv-ec and sv-bc. I accept that > it raises some tricky problems, but I think users will > be mightily confused to find they can't detect > changes on the result of $sampled() or $past(), where > the user was expecting to get a deglitched and possibly > delayed version of a signal and wanted to use changes > on that conditioned signal to trigger downstream > activity. > -- > Jonathan Bromley, Consultant > > DOULOS - Developing Design Know-how > VHDL * Verilog * SystemC * e * Perl * Tcl/Tk * Project Services > > Doulos Ltd. Church Hatch, 22 Market Place, Ringwood, Hampshire, BH24 1AW, UK > Tel: +44 (0)1425 471223 Email: jonathan.bromley@doulos.com > Fax: +44 (0)1425 471573 Web: http://www.doulos.com > > The contents of this message may contain personal views which > are not the views of Doulos Ltd., unless specifically stated. >Received on Fri Nov 3 11:35:39 2006
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