Doubts in BP working

[aaku...@ncsu.edu]

Hi,

I am having a doubt in the Branch Predictor. What is addrShift used for? Can you please help me understand the piece of code attached below? The code is from BPred.h file.

Thank you,
Aishwarya

[Jose Renau]

To restrict the fetch prediction per boundary. In hardware there tends to be no time to compute the time for each PC. It is common to use the "fetch PC" as the index for tables. The shift is related to fetch width.

Jose Renau Professor, Computer Science & Engineering W // http://masc.soe.ucsc.edu

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