( ESNUG 385 Item 7 ) --------------------------------------------- [12/19/01]
Subject: ( ESNUG 382 #7 ) Maybe Arcadia Can't, But Hercules/Star-RCXT Can !
> The fundamental problem Eyal has is that once his database has been
> converted to GDSII, all the LEF/DEF information has been lost. There
> is no way for any extractor to know what the gate level primitives are
> such that they could be reformed at the gate level and fed back to a
> gate level timing engine like PrimeTime.
>
> - Ken Maples
> Synopsys, Inc. Mountain View, CA
From: Krishna Sundaresan <krishna_kumar@avanticorp.com>
Hi, John,
The reason why Arcadia cannot do hierarchical extraction with GDSII, is
because the database is flattened by LVS tool possibly Dracula/Calibre.
It is WRONG to say no EXTRACTOR can do this.
Hercules and Star-RCXT supports both cell-level (hierarchical) and
transistor level extraction from GDSII. This flow is setup at multiple
customer sites and works.
The cell level netlist with cross referencing can be back-annotated to
PrimeTime or any STA tool.
- Krishnkumar Sundaresan
Avanti Corp.
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