Indirect branch prediction
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United States of America Patent
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Oct 17, 2017
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N/A
app pub date -
Jan 31, 2014
filing date -
Mar 13, 2013
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Abstract
Methods and indirect branch predictor logic units to predict the target addresses of indirect branch instructions. The method comprises storing in a table predicted target addresses for indirect branch instructions indexed by a combination of the indirect path history for previous indirect branch instructions and the taken/not-taken history for previous conditional branch instructions. When a new indirect branch instruction is received for prediction, the indirect path history and the taken/not-taken history are combined to generate an index for the indirect branch instruction. The generated index is then used to identify a predicted target address in the table. If the identified predicted target address is valid, then the target address of the indirect branch instruction is predicted to be the predicted target address.
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