Trial placement system with cloning
US7155694B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2004 |
| Grant date | Dec 26, 2006 |
| Priority date | — |
| Expiry date | Feb 25, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F30/392
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In accordance with a method for generating a trial placement plan for an IC having two or more identical modules, a floor plan reserves a separate area of identical size and shape for each of the identical modules, one of which is designated a “master module” and the others designated “clone modules”. A placement and routing (P&R) tool initially places all of the cell instances of the clone modules at the center of their reserved areas. The P&R tool then employs a conventional placement algorithm to iteratively adjust positions of cell instances of all other modules, including the master module within their reserved areas in a manner that tries to minimize net lengths. The P&R tool copies the placement within the master module area into the clone module areas either after every N>0 iterations of the placement algorithm and/or after the placement algorithm has completed placement for the master module area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.