Re: [sv-ac] updated cover sequence proposal

From: John Havlicek <john.havlicek_at_.....>
Date: Wed Jul 11 2007 - 12:30:22 PDT
Hi Bassam:

> 2) The wording of "cover property" being a "one match" is too strong.
> There are cases (implication) when more than one match results, in fact
> we rely on this (per previous discussion) to define the semantics of
> "cover sequence".

If there is confusion between using "cover property" with a match item
to define the coverage count for "cover sequence", then we can go back
to "assert property".

In other words, we can say that, for a given attempt of

   cover sequence (S);

the number by which the coverage count is incremented is the same as
the number of times "increment_coverage" is executed in the
corresponding attempt of 

   assert property (S |-> (1, increment_coverage));

J.H.

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> Thread-Topic: [sv-ac] updated cover sequence proposal
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> From: "Bassam Tabbara" <Bassam.Tabbara@synopsys.com>
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> 
> Hi Lisa,
> =20
> 3 comments -- independent issues:
> =20
> 1) Do we really need to create a backward incompatibility ? We can leave
> cover property (sequence_expr) in and recommend not using or at least
> *deprecate* instead of striking out. It's not an erratum we are fixing,
> rather can be thought of as better/clearer syntax + enhancement to add
> disable iff -- intended to help users not make things harder short term.
> =20
> 2) The wording of "cover property" being a "one match" is too strong.
> There are cases (implication) when more than one match results, in fact
> we rely on this (per previous discussion) to define the semantics of
> "cover sequence".
> =20
> 3) Do we need to file a separate proposal for semantics update (the
> annex) ? Or are we adding to same ?
> =20
> Thx.
> -Bassam.
> =20
> 
> ________________________________
> 
> From: owner-sv-ac@eda.org [mailto:owner-sv-ac@eda.org] On Behalf Of Lisa
> Piper
> Sent: Wednesday, July 11, 2007 6:18 AM
> To: sv-ac@eda-stds.org
> Subject: [sv-ac] updated cover sequence proposal
> 
> 
> 
> I have uploaded a new version of 1768 - cover sequence.  It is attached
> for convenience.=20
> 
> Lisa <<1768_cover_sequence_3.pdf>>=20
> 
> 
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> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
> <HTML><HEAD><TITLE>updated cover sequence proposal</TITLE>
> <META http-equiv=3DContent-Type content=3D"text/html; charset=3Dus-ascii">
> <META content=3D"MSHTML 6.00.6000.16481" name=3DGENERATOR></HEAD>
> <BODY>
> <DIV><SPAN class=3D740513415-11072007><FONT face=3DArial color=3D#0000ff si=
> ze=3D2>Hi=20
> Lisa,</FONT></SPAN></DIV>
> <DIV><SPAN class=3D740513415-11072007><FONT face=3DArial color=3D#0000ff=20
> size=3D2></FONT></SPAN>&nbsp;</DIV>
> <DIV><SPAN class=3D740513415-11072007><FONT face=3DArial color=3D#0000ff=20
> size=3D2>3&nbsp;comments -- independent issues:</FONT></SPAN></DIV>
> <DIV><SPAN class=3D740513415-11072007><FONT face=3DArial color=3D#0000ff=20
> size=3D2></FONT></SPAN>&nbsp;</DIV>
> <DIV><SPAN class=3D740513415-11072007><FONT face=3DArial color=3D#0000ff si=
> ze=3D2>1) Do=20
> we really need to create a backward incompatibility ? We can leave <EM>cove=
> r=20
> property (sequence_expr)</EM> in and recommend not using or at least *depre=
> cate*=20
> instead of striking out. It's not an erratum we are fixing,&nbsp;rather can=
>  be=20
> thought of as better/clearer syntax + enhancement to add disable iff -- int=
> ended=20
> to help users not make things harder short term.</FONT></SPAN></DIV>
> <DIV><SPAN class=3D740513415-11072007><FONT face=3DArial color=3D#0000ff=20
> size=3D2></FONT></SPAN>&nbsp;</DIV>
> <DIV><SPAN class=3D740513415-11072007><FONT face=3DArial color=3D#0000ff si=
> ze=3D2>2) The=20
> wording of "cover property" being a "one match" is too strong. There are ca=
> ses=20
> (implication) when more than one match results, in fact we rely on this (pe=
> r=20
> previous discussion) to define the semantics of "cover=20
> sequence".</FONT></SPAN></DIV>
> <DIV><SPAN class=3D740513415-11072007><FONT face=3DArial color=3D#0000ff=20
> size=3D2></FONT></SPAN>&nbsp;</DIV>
> <DIV><SPAN class=3D740513415-11072007><FONT face=3DArial color=3D#0000ff si=
> ze=3D2>3) Do=20
> we need to file a separate proposal for semantics update (the annex) ? Or a=
> re we=20
> adding to same ?</FONT></SPAN></DIV>
> <DIV><FONT face=3DArial color=3D#0000ff size=3D2></FONT>&nbsp;</DIV>
> <DIV align=3Dleft><FONT face=3DArial size=3D2>Thx.</FONT></DIV>
> <DIV align=3Dleft><FONT face=3DArial size=3D2>-Bassam.</FONT></DIV>
> <DIV>&nbsp;</DIV><BR>
> <DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr align=3Dleft>
> <HR tabIndex=3D-1>
> <FONT face=3DTahoma size=3D2><B>From:</B> owner-sv-ac@eda.org=20
> [mailto:owner-sv-ac@eda.org] <B>On Behalf Of </B>Lisa Piper<BR><B>Sent:</B>=
> =20
> Wednesday, July 11, 2007 6:18 AM<BR><B>To:</B>=20
> sv-ac@eda-stds.org<BR><B>Subject:</B> [sv-ac] updated cover sequence=20
> proposal<BR></FONT><BR></DIV>
> <DIV></DIV><!-- Converted from text/rtf format -->
> <P dir=3Dltr><SPAN lang=3Den-us><FONT face=3DArial>I have uploaded a new ve=
> rsion of=20
> 1768</FONT></SPAN><SPAN lang=3Den-us> <FONT face=3DArial>&#8211;</FONT></SP=
> AN><SPAN=20
> lang=3Den-us><FONT face=3DArial> cover</FONT></SPAN><SPAN lang=3Den-us> <FO=
> NT=20
> face=3DArial>sequence.&nbsp; It is attached for convenience.</FONT></SPAN><=
> SPAN=20
> lang=3Den-us> </SPAN></P>
> <P dir=3Dltr><SPAN lang=3Den-us></SPAN></P>
> <P dir=3Dltr><SPAN lang=3Den-us><FONT face=3DArial>Lisa</FONT></SPAN><SPAN=
> =20
> lang=3Den-us></SPAN><SPAN lang=3Den-us></SPAN><SPAN lang=3Den-us><FONT face=
> =3DArial=20
> color=3D#000000 size=3D2> &lt;&lt;1768_cover_sequence_3.pdf&gt;&gt;=20
> </FONT></SPAN><SPAN lang=3Den-us></SPAN><SPAN lang=3Den-us></SPAN><SPAN=20
> lang=3Den-us></SPAN></P>
> <P dir=3Dltr><SPAN lang=3Den-us></SPAN></P><BR>-- <BR>This message has been=
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Received on Wed Jul 11 12:30:48 2007

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