Mentor Graphics Corporation

Ikos Systems, Inc.

Charley Selvidge

Peer Schmitt

William K Stewart

Joshua Marantz

Muralidhar R Kudlugi

Mark E Seneski

Robert W Davis

Ken Crouch

Joshua D Marantz

David C Scott

Frederic Reblewski

A system and method for compressing trace data from an emulation system. Scan chains may receive trace data from configurable logic blocks inside one or more emulation chips, and the data received from the scan chains may be compressed. Where delta compression is used, the scan chains may also perform a delta detection function. Alternatively, delta detection may be performed using the outputs of the scan chains. In addition, event detectors may be implemented within or outside of the scan chains. Compression of the trace data may include receiving a plurality of data sets and performing compression along cross-sections of the combined data sets.

Compression of emulation trace data

A system and a method provide full visibility to each net of a design under modeling by saving states of the design during modeling and reconstructing waveforms at each net by logic evaluation using the saved states. In one embodiment, primary data input signals and memory output signals ('sample signals') are saved by a logic analyzer, and used in an emulator to generate state vectors from a state snapshot previously recorded. Data compression techniques can be applied to minimize storage requirements, and parallel evaluation of segments of waveforms can be achieved, since saved states for the entire period of interest are available for waveform reconstruction at the time of the logic evaluation.

Reconstruction engine for a hardware circuit emulator

Growing community of inventors

Wellesley, MA, United States of America

Charley Selvidge