Branch predictor

Figure 1: Example of 4-stage pipeline. The colored boxes represent instructions independent of each other

Figure 2: State diagram of 2-bit saturating counter

Figure 3: Two-level adaptive branch predictor. Every entry in the pattern history table represents a 2-bit saturating counter of the type shown in figure 2.[5]

In computer architecture, a branch predictor is a digital circuit that tries to guess which way a branch (e.g. an if-then-else structure) will go before this is known for sure. The purpose of the branch predictor is to improve the flow in the instruction pipeline. Branch predictors play a critical role in achieving high effective performance in many modern pipelined microprocessor architectures such as x86.

单词	Branch Prediction
释义	Branch Prediction 原声例句科技 Crash Course To minimize the effects of these flushes, CPU manufacturers have developed sophisticated ways to guess which way branches will go, called branch prediction. 为了尽量减少这些刷新的影响，CPU 制造商开发了复杂的方法来猜测分支将走哪条路，称为分支预测。英语百科 Branch predictor In computer architecture, a branch predictor is a digital circuit that tries to guess which way a branch (e.g. an if-then-else structure) will go before this is known for sure. The purpose of the branch predictor is to improve the flow in the instruction pipeline. Branch predictors play a critical role in achieving high effective performance in many modern pipelined microprocessor architectures such as x86.
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Branch Prediction

Branch predictor