Synopsys, Inc.

Leonid Alexander Broukhis

Dhiraj Goswami

Ngai Ngai William Hung

Boris Gommershtadt

Dmitry Korchemny

Florent Duru

Gabriel Gouvine

Sitanshu Seth

Lingyi Liu

Coverage event counters for hardware verification emulations are implemented as linear feedback shift register-based counters generating encoded counter values indicative of a detected number of coverage events. To decode those counter values, a counter algorithm utilized to generate the encoded counter value may continue to be iterated after counting is complete until reaching a defined pattern, while counting the number of iterations (K) necessary to reach the defined pattern. The resulting counter value having the defined pattern is correlated with a mapping table to identify a numerical value, and an ordinal counter value indicative of the number of coverage events is determined based on the identified numerical value, less K.

Efficient realization of coverage collection in emulation

Configuring a hardware verification system includes receiving first data representing a first integrated circuit design configured to operate via a first clock signal derived from a second clock signal and a third signal generated by the second clock signal. The computer transforms the first data into second data representing a second design that includes functionality of the first design. The transformation replaces the first clock signal with the second clock signal. A first Boolean function is defined by first and second values of the third signal corresponding to a first transition of the second clock signal being in a same direction as a transition of the first clock signal. A second Boolean function is defined by the first and second values of the third signal corresponding to a second transition of the second clock signal being in a direction opposite to the associated transition of the first clock signal.

Formal method for clock tree analysis and optimization

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Mountain View, CA, United States of America

Leonid Alexander Broukhis