SOFTWARE PROGRAMMABLE HARDWARE STATE MACHINES
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United States of America Patent
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app pub date -
Feb 24, 2012
filing date -
Sep 8, 2006
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Abandoned
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Abstract
The present invention provides software programmable hardware state machines to detect a cause of an error in a processor and prevent the error from occurring. A processor core is provided that includes an execution unit, a programmable mask register and a buffer that stores values representing instructions dispatched to the execution unit. The processor core also includes control logic to determine whether there is a match between a sequence in the mask register and a sequence in the buffer and, upon detecting a match, to generate control signals to perform a desired action. The desired action prevents an unwanted change from occurring to the architectural state of the processor. The processor core further comprises a programmable fix register. In an embodiment, the control logic generates the control signals based on control bits stored in the fix register.
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