System and method for proxied evaluation of PCells

• US 7,698,662 B1
• Filed: 07/21/2006
• Issued: 04/13/2010
• Est. Priority Date: 07/21/2006
• Status: Active Grant

• Current Assignee: Synopsys Incorporated
• Original Assignee: Ciranova LLC (Synopsys Incorporated)
• Inventors: Lim, Lyndon Charles, Petrus, Edwin Simon, Wu, Felix Sun-Tsyr
• Primary Examiner(s): Chiang; Jack
• Assistant Examiner(s): Parihar; Suchin
• Application Number:
  US11/490,678
• Time in Patent Office: 1,362 Days
• Field of Search: 716/18, 716/1
• US Class Current: 716/104
• CPC Class Codes: G06F 30/39 Circuit design at the physical level physical level design for reconfigurable circuits G06F30/347

Abstract

Systems and methods of laying out integrated circuits are disclosed. During the layout stage of an integrated circuit device, a fixed, physical geometry is created of the parameterized cells (PCells) included in the integrated circuit schematic. The systems include a proxy engine configured to save to cache the geometries created during the layout stage such that the geometries need not be recomputed when the design is opened after a save to disk operation, during which geometries may otherwise be destroyed. The proxy engine may further be configured to delegate requests for the creation of geometries to other components of the integrated circuit design system. In addition, the proxy engine may be configured to perform customized evaluations of PCells, other than or in addition to caching and delegation.

Claims

1. A system for designing an integrated circuit, the system comprising:

a wrapping module configured to add data to an original vendor specific PCell to transform the original PCell to a wrapped PCell in an open standard compatible format, wherein the wrapped PCell is not vendor specific; and

an evaluator configured to evaluate the wrapped PCell to generate an evaluation result based on a request from a user application, the evaluation result comprising layout data in the open standard compatible format.

2. The system of claim 1, wherein the evaluator is an original PCell evaluator.

3. The system of claim 1, wherein the evaluator is a proxy PCell evaluator.

4. The system of claim 3, further comprising a proxy control settings component configured to determine system settings at runtime.

5. The system of claim 3, wherein the added data comprises data specific to the proxy PCell evaluator, and the proxy PCell evaluator is configured to respond to the proxy specific data.

6. The system of claim 1, further comprising a cache configured to store the evaluation result.

7. The system of claim 6, further comprising a server configured to house the cache.

8. The system of claim 1, wherein the open standard compatible format is the OpenAccess standard.

9. The system of claim 1, further comprising a server configured to house the evaluator.

10. The system of claim 1, further comprising a file library configured to store the PCells with the added data.

11. The system of claim 10, further comprising a server configured to house the file library.

12. A method for designing an integrated circuit, comprising:

executing a wrapping module stored in memory to add data to an original vendor specific PCell to transform the original PCell to a wrapped PCell in an open standard compatible format, wherein the wrapped PCell is not vendor specific;

receiving, at a proxy engine, a request from a user application to evaluate the wrapped PCell; and

evaluating the wrapped PCell based on the request to generate an evaluation result comprising layout data in the open standard compatible format.

13. The method of claim 12, wherein the open standard compatible format is the OpenAccess standard.

14. The method of claim 12, further comprising storing the generated evaluation results to a cache.

15. The method of claim 14, wherein the storing is performed for the purpose of avoiding recomputation of the evaluation results.

16. The method of claim 12, wherein the receiving of the request comprises delegating the request to an evaluator configured to reside on a server.

17. The method of claim 12, wherein the evaluating of the request comprises determining whether a valid cache exists.

18. The method of claim 17, wherein the evaluating of the request further comprises accessing the valid cache to retrieve open standard compatible data from the valid cache if the valid cache exists.

19. The method of claim 17, wherein the evaluating of the request further comprises storing the evaluation result to the cache.

20. A machine readable storage medium having embodied thereon a program, the program being executable by a machine to perform a method for designing an integrated circuit, the method comprising:

adding data to an original vendor specific PCell to transform the original PCell to a wrapped PCell in an open standard compatible format, wherein the wrapped PCell is not vendor specific;

receiving, at a proxy engine, a request from a user application to evaluate the wrapped PCell; and

evaluating the wrapped PCell based on the request to generate an evaluation result comprising layout data in the open standard compatible format.