Intelligent cell swapping based on ceiling determination, floor determination, and cell attribute weighting criteria
US10089428B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2015 |
| Grant date | Oct 2, 2018 |
| Priority date | — |
| Expiry date | Sep 4, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F30/39
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Embodiments of the inventive concept include a computer-implemented method for intelligently swapping circuit cells and an associated intelligent cell swapper logic section. The technique can include receiving, by an intelligent cell swapper logic section, a synthesized gate level netlist including cells each having an initial cell class. A cell class sorter can sort cell classes in order of leakage. A ceiling finder can swap the initial cell class for each of the cells to a highest cell leakage class, and determine a ceiling frequency. A floor finder can swap the highest cell leakage class for each of the cells to a lowest cell leakage class, and determine a floor frequency. An effective swap weight calculator section can determine an effective swap weight for a subset of cells based on cell attribute weighting criteria. The timing paths can be optimized to meet the ceiling frequency without unnecessarily using high leakage cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.