Cadence Design Systems, Inc.

Tuay-Ling Kathy Lang

Neeti Khullar Bhatnagar

Andrew Robert Wilmot

George Franklin Frazier

Qizhang Chao

Robert D Shur

Stuart C Rae

Edwin A Harcourt

Jai Bharat Patel Gulabeela

Bishnupriya Bhattacharya

Koushik Roy

Doug Dunlop

An apparatus and method for determining an optimal global quantum value for use in event-driven simulations of a device are disclosed herein. The device is simulated using information representative of a device design corresponding to the device, the simulation of the device comprising an event-driven simulation using a provisional global quantum value. Events included in a sequence chart corresponding to the simulation using the provisional global quantum value are compared against expected events. Based on the comparison detecting at least one of the expected events being absent in the sequence chart, providing the optimal global quantum value as being smaller than the provisional global quantum value. Based on the comparison detecting no difference between the events in the sequence chart and the expected events, providing the optimal global quantum value as being larger than the provisional global quantum value.

Determining an optimal global quantum for an event-driven simulation

An apparatus and method for detecting memory access violations in simulations is disclosed herein. A detection tool is designed to automatically perform a violation check for each memory read or write operation simulated in a modeled system. The detection tool is capable of handling a modeled system including one or more memories and/or one or more processors.

Detection of memory access violation in simulations

A system for controlling reset in discrete event simulation is disclosed. The system includes a simulator configured to effect the discrete event simulation, the simulator having a plurality of shared executable files, a memory configured to store the simulator for execution, an operating system having a loading/unloading facility, and a control program configured to effect a reset operation by directing the operating system to unload the simulator from the memory and then reload the simulator into the memory using the loading/unloading facility.

Method and system for realizing reset in discrete event simulation

A method for simulation of mixed-language circuit designs is disclosed. In one embodiment, an object-oriented language module is natively instantiated within a hardware description language based design. In another embodiment, a hardware description language module is natively instantiated within an object-oriented language based design. A system for simulation of mixed-language circuit designs is also disclosed. In one embodiment, a simulator is configured to natively manipulate an object-oriented language module within a hardware description language based design. In another embodiment, a simulator is configured to natively manipulate a hardware description language module within an object-oriented language based design.

Method and system for simulation of mixed-language circuit designs

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Boxborough, MA, United States of America

Tuay-Ling Kathy Lang