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单词 Jump prediction
释义

Jump prediction

中文百科

分支预测器 Branch predictor

(重定向自Jump prediction)
2位饱和计数器
两级自适应预测器。pattern history table中的每个条目是上文的2位饱和计数器。
Figure 1: Example of 4-stage pipeline. The colored boxes represent instructions independent of each other

在电脑架构中,分支预测器英语:Branch predictor)是一种数字电路,在分支指令执行结束之前猜测哪一路分支将会被运行,以提高处理器的指令流水线的性能。使用分支预测器的目的,在于改善指令管线化的流程。现代使用指令管线化处理器的性能能够提高,分支预测器对于现今的指令流水线微处理器获得高性能是非常关键的技术。

英语百科

Branch predictor 分支预测器

(重定向自Jump prediction)
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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更新时间:2025/6/17 19:48:12