Methods and systems for branch predictor

Abstract

A method and system for a branch predictor shared by different processor logic cores of the same processor physical core is provided, the method comprising: in a case of enabling a flag function, adding a piece of branch prediction record information in response to one processor logic core, adding a flag indicating which processor logic core the branch prediction record information is added to theadded branch prediction record information; and when the branch predictor carries out branch prediction on a program executed on the first processor logic core, branch prediction record information added to the first processor logic core being determined according to the mark. Branch prediction is performed using only branch prediction record information added to the first processor logic core indicated by the flag.

Description

technical field [0001] This application relates to the field of processors, and more particularly, to methods and systems for branch predictors. Background technique [0002] Modern processors generally adopt a multi-stage pipeline structure. A problem arises when a pipelined processor handles a branch instruction. Depending on the true / false condition, a jump may occur, which interrupts the processing of the instruction in the pipeline because the processor cannot The instruction next to this instruction is determined until the branch is executed. The longer the pipeline, the longer the processor waits, because it must wait for the branch instruction to be processed before it can determine the next instruction to enter the pipeline. [0003] Use branch predictors to improve execution efficiency. In the process of predictive execution, the processor will predict the result of a certain condition judgment based on the historical information of code execution, and then sele...

AI Technical Summary

Problems solved by technology

Static branch prediction is to directly select one of the branches, with an average hit rate of...

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