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Subject: Creating cross-coveraghe within vr_ad
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maurizios
Posts: 8
Online: User is Offline
7/02/2008 1:16 AM  
Hi,
does anyone knows a quick method to create a cross coverage between 2 fields belonging to different registers; i.e. I have

reg XX which contains field a

reg YY which contains field b

I would like to create a cross-coverage item (either in reg X or in YY) between fields a and b

Thanks
Maurizio
thinkverification
Posts: 28
Online: User is Offline
7/02/2008 4:41 AM  
Hi Maurizio,

Normally what I would do is grab the field value from its enclosing reference model by method or by pointing to it.
This way I can cross reg values with other reg values or with any info I need in the data path. The advantage here is that the sampling event is already taken care of.
I believe you could also extend the reg_file struct and define the cross items there, but then you'll have to take care of the sampling event, and make sure coverage is only recorded when relevant.

I hope that helps...

Yaron
Yaron Ilani
VLSI Verification Specialist
www.ThinkVerification.com
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Forums > Functional Verification > e > Creating cross-coveraghe within vr_ad


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