Comment 3 for bug 579337

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well, actually under the hood each processor could be emulated using a finite state machine, this is in fact the most common approach.
Things like "...->addRegister, ->addPort" etc would already be relatively high level, i.e. you would need to implement a state machine that is specific to processor-emulation.

FWIW, you may want to check out: http://www.freepatentsonline.com/6041176.html