Branch prediction preloading
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United States of America Patent
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Sep 29, 2015
Grant Date -
Dec 19, 2013
app pub date -
Mar 5, 2013
filing date -
Jun 14, 2012
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Embodiments relate to branch prediction preloading. A method for branch prediction preloading includes fetching a plurality of instructions in an instruction stream, and decoding a branch prediction preload instruction in the instruction stream. The method also includes determining, by a processing circuit, an address of a predicted branch instruction based on the branch prediction preload instruction, and determining, by the processing circuit, a predicted target address of the predicted branch instruction based on the branch prediction preload instruction. The method further includes identifying a mask field in the branch prediction preload instruction, and determining, by the processing circuit, a branch instruction length of the predicted branch instruction based on the mask field. Based on executing the branch prediction preload instruction, a branch target buffer is preloaded with the address of the predicted branch instruction, the branch instruction length, and the predicted target address associated with the predicted branch instruction.
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