CHECK POINTING A SHIFT REGISTER
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United States of America Patent
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Jul 8, 2016
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Jul 8, 2015
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Abstract
A hardware structure provides a way for check pointing a main shift register one or more times. The hardware structure includes an extended shift register used to store the data elements most recently shifted onto the main shift register which has an extra data position for each check point. An update history shift register has a data position for each check point which is used to store information indicating whether the extended shift register was updated. Check point generation logic derives each check point by selecting a subset of the data elements stored in the extended shift register based on the information stored in the update history shift register.
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