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单词 Branch Prediction
释义

Branch Prediction

原声例句
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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

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.
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