Method and system for optimizing prefetching of cache memory lines
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United States of America Patent
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Jun 23, 2015
Grant Date -
Oct 4, 2012
app pub date -
Apr 1, 2011
filing date -
Apr 1, 2011
priority date (Note) -
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Abstract
A method and system to optimize prefetching of cache memory lines in a processing unit. The processing unit has logic to determine whether a vector memory operand is cached in two or more adjacent cache memory lines. In one embodiment of the invention, the determination of whether the vector memory operand is cached in two or more adjacent cache memory lines is based on the size and the starting address of the vector memory operand. In one embodiment of the invention, the pre-fetching of the two or more adjacent cache memory lines that cache the vector memory operand is performed using a single instruction that uses one issue slot and one data cache memory execution slot. By doing so, it avoids additional software prefetching instructions or operations to read a single vector memory operand when the vector memory operand is cached in more than one cache memory line.
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