Techniques for selecting a predicted indirect branch address from global and local caches
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United States of America Patent
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Sep 13, 2016
Grant Date -
Feb 12, 2015
app pub date -
Aug 8, 2013
filing date -
Aug 8, 2013
priority date (Note) -
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Abstract
A technique for branch target prediction includes storing, based on an instruction fetch address for a group of fetched instructions, first predicted targets for first indirect branch instructions in respective entries of a local count cache. Second predicted targets for second indirect branch instructions are stored in respective entries of a global count cache, based on the instruction fetch address and a global history vector for the instruction fetch address. One of the local count cache and the global count cache is selected to provide a selected predicted target for an indirect branch instruction in the group of fetched instructions.
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