Patent · US Active

Port assignment in hierarchical designs by abstracting macro logic

US7962877B2 · kind B2 · utility

2Cited by

4References

20Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Joachim Keinert · Altdorf, DE
Juergen Koehl · Holzgerlingen, DE
Thomas Ludwig · Sindelfingen, DE

Key dates

Filing date	Aug 5, 2008
Grant date	Jun 14, 2011
Priority date	—
Expiry date	Aug 4, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG06F2119/12
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A method to reduce the problem complexity maintains a relatively high quality port assignment by abstracting local connections in the macro when performing the port assignment. This is done for netlength, congestion as well as timing. The internal netlist of the macro is abstracted in such a way that the optimization of the external interconnect can be done in an efficient manner. Three levels of abstractions are described. A first level optimizes the top level interconnect, a second level optimizes the top level and macro interconnects, while a third level optimizes the top level timing.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.