Speculative popcount data creation
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United States of America Patent
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Feb 26, 2013
Grant Date -
Oct 21, 2010
app pub date -
Apr 16, 2009
filing date -
Apr 16, 2009
priority date (Note) -
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Abstract
A method and a data processing system by which population count (popcount) operations are efficiently performed without incurring the latency and loss of critical processing cycles and bandwidth of real time processing. The method comprises: identifying data to be stored to memory for which a popcount may need to be determined; speculatively performing a popcount operation on the data as a background process of the processor while the data is being stored to memory; storing the data to a first memory location; and storing a value of the popcount generated by the popcount operation within a second memory location. The method further comprises: determining a size of data; determining a granular level at which the popcount operation on the data will be performed; and reserving a size of said second memory location that is sufficiently large to hold the value of the popcount.
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