Waveform manipulation in time warp simulation

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United States of America Patent

PATENT NO 6195628
SERIAL NO

08816579

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Abstract

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A system and method for manipulating waveforms, including transaction cancellation, in parallel time-warp simulation of circuits, such as those modeled in VHDL. Events waveforms for each output of a processor are organized by the simulation time (ST) of the events which created them and by the simulation time (RT) at which they are to be effective. A phantom buffer provides a linked list of events and associated transactions cancelled as a result of insertion of a new event in said chain of events. Rollback of a cancelled event waveform is done by restoring to the linked lists selected events and transactions from the phantom buffer.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Blaauw, David T Austin, TX 41 561
Radia, Nimish S Austin, TX 4 88
Skovira, Joseph F Owego, NY 18 417

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