Functional reactive PCells

• US 10,460,069 B1
• Filed: 12/30/2015
• Issued: 10/29/2019
• Est. Priority Date: 12/30/2015
• Status: Active Grant

• Current Assignee: Cadence Design Systems Incorporated (Cadence Group), Robert Bosch GmbH
• Original Assignee: Cadence Design Systems Incorporated (Cadence Group)
• Inventors: Burdick, Thomas, Herth, Peter, Jerke, Goran, Burzele, Christel, Marolt, Daniel, Marolt, Vinko
• Primary Examiner(s): Chiang, Jack
• Assistant Examiner(s): Bowers, Brandon
• Application Number:
  US14/984,844
• Time in Patent Office: 1,399 Days
• Field of Search: 716136
• CPC Class Codes: G06F 30/39 Circuit design at the physical level physical level design for reconfigurable circuits G06F30/347
• CPC Class Codes: G06F 30/398 Design verification or optimisation, e.g. using design rule check [DRC], layout versus schematics [LVS] or finite element methods [FEM] optical proximity correction [OPC] design processes G03F1/36

Abstract

Electronic design automation systems and methods for functional reactive parameterized cells (FR-PCells) are described. In one embodiment, a PCell includes a reactive parameter that is based on context information regarding other cells or elements of an overall circuit design. Processing of the FR-PCell may then depend on processing of other PCells or other elements of a circuit design. Similarly, an FR-PCell may provide context information to other FR-PCells. In some embodiments, processing of an FR-PCell to generate an instance of the FR-PCell is managed by a reaction engine that monitors updates to context information or other PCells to automatically adjust instances of the FR-PCells.

Claims

1. An electric design automation (EDA) computing device comprising:

a memory, and

one or more hardware processors coupled to the memory and configured to;

initiate a processor evaluation of a first parameterized cell comprising data stored in the memory to generate a first instance of the first parameterized cell, the first parameterized cell comprising one or more reactive parameters and the first parameterized cell being part of a circuit design dataset;

access one or more static cell parameters for the first parameterized cell from a memory of the EDA computing device;

identify a first reactive parameter of the one or more reactive parameters and a first evaluation state associated with the first reactive parameter;

determine a first value of the first reactive parameter, wherein the first value of the first reactive parameter is determined, at least in part, in conjunction with one or more context elements of the circuit design dataset having a first set of context values, and wherein the one or more context elements are identified by the one or more hardware processors as part of the processor evaluation of the first parameterized cell; and

generate the first parameterized cell using the one or more static cell parameters and the first value of the first reactive parameter, the first instance of the first parameterized cell.

2. The device of claim 1 wherein the one or more processors are further configured to:

communicate a notification of the first value of the first reactive parameter to a second processor evaluation of a second parameterized cell using a mailbox process, wherein the mailbox process is managed by a live reaction engine executed by the one or more processors.

3. The device of claim 1, wherein the determination of the first value of the first reactive parameter as determined in conjunction with the one or more context elements of the circuit design dataset having the first set of context values comprises determining the first value of the first reactive parameter using one or more metal layers of the circuit design dataset.

4. The device of claim 1, wherein the determination of the first value of the first reactive parameter as determined in conjunction with the one or more context elements of the circuit design dataset having the first set of context values comprises determining one or more guard ring cuts for the circuit design dataset.

5. The device of claim 1, wherein the determination of the first value of the first reactive parameter as determined in conjunction with the one or more context elements of the circuit design dataset having the first set of context values comprises determining the first value of the first reactive parameter using one or more interconnects of the circuit design dataset.

6. The device of claim 1, wherein the determination of the first value of the first reactive parameter as determined in conjunction with the one or more context elements of the circuit design dataset having the first set of context values comprises determining the first value of the first reactive parameter using routing and via creation information.

7. The device of claim 1, wherein the one or more hardware processors are further configured to:

pause the evaluation of the first parameterized cell as part of a pause and look around operation following the identification of the first reactive parameter and prior to the determination of the first value of the first reactive parameter;

initiate evaluation of a second parameterized cell as part of the pause and look around operation in response to determining that the one or more context elements comprises the second parameterized cell; and

resuming the evaluation of the first parameterized cell following the evaluation of the second parameterized cell,

wherein the determination of the first value of the first reactive parameter as determined in conjunction with context elements of the one or more context elements from the evaluation of the second parameterized cell.

8. The device of claim 1, wherein the one or more hardware processors are further configured to:

store an intermediate configuration of the first parameterized cell as part of the pause and look around operation;

identify a design change associated with the one or more context elements following determination of the first reactive parameter; and

performing an update using the intermediate configuration of the parameterized cell and the design change.

9. A method performed by an electronic design automation (EDA) computing device comprising one or more processors and a memory coupled to the one or more processors, the method comprising:

receiving a user input to adjust a first portion of a layout to generate an initial functional reactive parameterized cell (FR-PCell) layout, the initial FR-PCell layout comprising a first parameterized cell;

in response to the user input, automatically initiating a processor evaluation of the first parameterized cell, the first parameterized cell comprising one or more reactive parameters and the first parameterized cell being part of a circuit design dataset;

identifying a first reactive parameter of the one or more reactive parameters at a first evaluation state as part of the processor evaluation;

determining a first value of the first reactive parameter at the first evaluation state, wherein the first value of the first reactive parameter is determined, at least in part, in conjunction with one or more context elements of the circuit design dataset having a first set of context values, and wherein the one or more context elements are identified by the one or more hardware processors as part of the processor evaluation of the first parameterized cell; and

generating a first layout state comprising a first instance of the first parameterized cell using the first value of the first reactive parameter.

10. The method of claim 9 wherein generation of the first layout state comprising the first instance of the first parameterized cell comprises:

determining the first value of the first reactive parameter of the one or more reactive parameters based on a change in the one or more context elements of the layout, wherein the change in the one or more context elements is initiated by the user input; and

modifying at least a portion of the one or more context elements of the layout based on generation of the first instance of the first parameterized cell to generate the first layout state.

11. The method of claim 10 further comprising:

updating an output display with a visual indication of changes to the layout state associated with the first value of the first reactive parameter; and

wherein the user input adjusting the first portion of a layout comprises a user input adjusting a first context element outside of the first instance of the first parameterized cell.

12. The method of claim 10 further comprising:

generating a list comprising the first value of the first reactive parameter and one or more modifications to the one or more context elements of the layout; and

updating an output display with the list,

wherein the user input comprises placement of the first parameterized cell within a graphical user interface of the EDA computing device.

13. A non-transitory computer readable medium comprising instructions that, when executed by one or more processors of a device, cause the device to perform operations comprising:

receiving a user input to adjust a first portion of a layout to generate an initial functional reactive parameterized cell (FR-PCell) layout, the initial FR-PCell layout comprising a first parameterized cell;

in response to the user input, automatically initiating a processor evaluation of the first parameterized cell, the first parameterized cell comprising one or more reactive parameters and the first parameterized cell being part of a circuit design dataset;

identifying a first reactive parameter of the one or more reactive parameters at a first evaluation state as part of the processor evaluation;

determining a first value of the first reactive parameter at the first evaluation state, wherein the first value of the first reactive parameter is determined, at least in part, in conjunction with one or more context elements of the circuit design dataset having a first set of context values, and wherein the one or more context elements are identified by the one or more hardware processors as part of the processor evaluation of the first parameterized cell; and

generating a first layout state comprising a first instance of the first parameterized cell using the first value of the first reactive parameter.

14. The non-transitory computer readable medium of claim 13, wherein the instructions further cause the device to perform operations comprising:

determining the first value of the first reactive parameter of the one or more reactive parameters based on a change in the one or more context elements of the layout, wherein the change in the one or more context elements is initiated by the user input; and

modifying at least a portion of the one or more context elements of the layout based on generation of the first instance of the first parameterized cell to generate the first layout state.

15. The non-transitory computer readable medium of claim 13, wherein the instructions further cause the device to perform operations comprising:

updating an output display with a visual indication of changes to the layout state associated with the first value of the first reactive parameter,

wherein the user input adjusting the first portion of a layout comprises a user input adjusting a first context element outside of the first instance of the first parameterized cell.

16. The non-transitory computer readable medium of claim 15, wherein the instructions further cause the device to perform operations comprising:

generating a list comprising the first value of the first reactive parameter and one or more modifications to the one or more context elements of the layout; and

updating an output display with the list,

wherein the user input comprises placement of the first parameterized cell within a graphical user interface of the EDA computing device.

17. The non-transitory computer readable medium of claim 13, wherein the determination of the first value of the first reactive parameter as determined in conjunction with the one or more context elements of the circuit design dataset having the first set of context values comprises determining the first value of the first reactive parameter using one or more metal layers of the circuit design dataset.

18. The non-transitory computer readable medium of claim 13, wherein the determination of the first value of the first reactive parameter as determined in conjunction with the one or more context elements of the circuit design dataset having the first set of context values comprises determining one or more guard ring cuts for the circuit design dataset.

19. The non-transitory computer readable medium of claim 13, wherein the determination of the first value of the first reactive parameter as determined in conjunction with the one or more context elements of the circuit design dataset having the first set of context values comprises determining the first value of the first reactive parameter using one or more interconnects of the circuit design dataset.

20. The non-transitory computer readable medium of claim 13 wherein the instructions further cause the device to perform operations comprising:

pause the evaluation of the first parameterized cell as part of a pause and look around operation following the identification of the first reactive parameter and prior to the determination of the first value of the first reactive parameter;

initiate evaluation of a second parameterized cell as part of the pause and look around operation in response to determining that the one or more context elements comprises the second parameterized cell; and

resuming the evaluation of the first parameterized cell following the evaluation of the second parameterized cell,

wherein the determination of the first value of the first reactive parameter as determined in conjunction with context elements of the one or more context elements from the evaluation of the second parameterized cell.