Hierarchically Layer generation

Hi Guiseppe

You can use the skillscript in COS solution 11237840 by Lawrence. : )


Best regards
Quek

Hi Giuseppe,

Darn, Quek beat me to it!  Yes,  I wrote Solution 11237840 for exactly this reason, it looks like the built in Layer Generation but it works across hierarchy levels.

Good luck, I hope that it does what you need!

Regards,

Lawrence.

Haha...I like to give out this solution because it is really good. : )

There's also the rteGeom* (e.g rteGeomOr) functions which are available in IC61 releases (after IC612, I think). These require Virtuoso Layout Suite GXL, but are a useful (and fast) way of doing full-hierarchy logical operations.

Regards,

Andrew.

I have around 2000 shapes throughout 50 cells that I'm trying to do logic on.  It's been going for 30 minutes now.  How long should be expected for this to run?  Should I go make a sandwich?  I'm on an UltraSparc IIIi at 1.6GHz.  Thanks.

It might help if you:

1. Stated the version of the software you're using
2. Explained what functions you are using? There are several approaches you might be using
3. More details of what "logic" you're doing.
4. Actually used some recent hardware (UltraSparc IIIi is probably a good 7 years old, and not exactly state of the art in terms of speed)

Andrew.

1. It seems obvious from the context of this thread that I am using IC5.1.41.  That is the only version that CCShierLayerOps.il will run on. 

2. What functions I am using?  I downloaded and installed CCShierLayerOps.il from the link provided above.  I am trying to use  CCShierLayerOps.il.

3. Does it really matter what kind of logic is being used?  It shouldn't, but just in case, I am doing: Active AND NOT Pplus == Nplus.

4. I wasn't bragging about my UltraSparc IIIi.  I know there are faster processors.  I only mentioned it because I figured that whomever answered would have said 'it might help if you said what processor you are using'.

5. The one thing that I forgot to say and that I thought for certain you would ask is the depth of hierarchy.  My DOH is 8.

6. By the way, after 6 hours this got no where and I had to kill it.   I was hoping someone could have said 'yeah, that's going to take 20+ hours'.  Then I can plan accordingly.

Regards, Zach

My previous question can be neglected.  I gave it 6 hours, turns out it needed 7.

 Hi Zach,

Just to address some of the points:

1) This code can be used with IC61x (I just tried it, it worked as I expected), even though it was written and tested with the IC5141 release.

2) CCShierLayerOps.il is not a function, it is the file that contains functions such as CCShiHierLayerOps(), CCShierLayerOps() and others.

3) It might do, because, as Andrew pointed out, there might be an alternative approach that turns out to be more efficient.

4) I've not seen much discussion about hardware used on this forum, but it is a relevant question - if the processor is a recent multi-core, versus, say, an older processor architecture.

5) Design complexity might be more of a factor than hierarchy depth, but it is difficult to say, although I wrote the code, I did not test it under a large array of possible scenarios and designs.  Unlike Cadence R&D I do not have any regression tests or data at my disposal.

6) Since the code is generic, but the operation of it is very design dependent, it is highly unlikely that anyone reading the forum would have an idea as to how long it might take to run this code on your design, on your hardware etc.

I am glad that you were able to get the code to work as you needed.  As noted above, I am the author of that particular piece of SKILL code, so I have a vested interest in it; I wrote it to perform a task that was not available from the virtuoso menus. I hope that you and others continue to find it helpful.

Regards,

Lawrence.

Hi Zach

It is great to hear that you have obtained the results. : )  Just a minor correction to make, the script also works in IC61x. I have just confirmed that it is working great on the latest version of IC614-510.

Best regards
Quek