Is this eco design flow right?

 Hi Dota,

Please look into the command ecoDesign. This may be what you're looking for.

- Kari 

Hi Kari

    thanks for your answer, But I think ecoDesign can't do the thing I want. ecoDesign refer two netlist, but what's I want refer three netlist (old1.v old2.v new1.v). Can you show a simple flow to help me resolve this problem.

Dota

 Hi Dota,

I guess I don't really understand what you're trying to do. Tell me if this is correct:

• you start with a netlist/floorplan (start.v, start.def)
• you do CTS and timing optimization on this netlist/floorplan (opt.v, opt.def)
• changes have been made to the original netlist/floorplan (start_eco.v, start_eco.def)
• you want to integrate those changes into the work you've already done in opt.v/opt.def

If that is the case, then you would generally need to start over with start_eco.v and rerun CTS, optDesign, etc.

- Kari 

yes, you are right. I want to intergrate new netlist change into old netlist(after cts & opt) without run cts & opt again. any way can do it?

Hi Dota,

     You can use Encounter Conformal ECO Flow.

ECOs can also be classified as pre-mask or post-mask. For a pre-mask ECO, the software
assumes any cell in the library is available for implementing the ECO. For a post-mask ECO,
the software will restrict the implementation to only use spare cells.

You can get more info from Encounter Conformal Equivalence Checking User Guide, but this feature

requires a Conformal ECO license.

Hi

 I want to learn ECOplace capability of Encounter. Specifically, I have a design, (and a netlist, a def etc)

(a). I save the entire (original) design "SaveDesign... "

(b). I now have a modified .v nelist.

(c). From here on, I want to place the additional logic in the modified.v netlist into the original design (so I know the -fixPlaceInsts) option.

The real queation is, how do I tell the tool to pick up a new .v file and process it? I am sure I am missing something major here.

Can someone help?

Thanks

Devendra Rai

You should use the ecoDesign command that Kari mentioned earlier in the thread. Below is the usage. Note that you specify the new netlist as one of the command arguments.

  ecoDesign [-postMask] [-modifyOnlyLayers MLb:MLt] {-spareCell spare} [-newSpareCellName suffix] [-useGACell GA_site] [-noEcoRoute] [-ecoSDC new.sdc] [-def fileName] [-fillerPrefix prefix] design.enc.dat top_cell new_netlist