现代微处理器转移预测设计策略

Design Policy of Branch Prediction for Modern Microprocessors

现代微处理器普遍采用流水线、超级流水线、超标量或VLIW等技术来提高指令级并行度ILP,但也带来由于条件转移指令导致流水线断流的效率损失问题,现代微处理器一般采用转移预测部件来尽量减小这种影响。

Branch instruction(especially conditional branch instruction)is a key of effecting performance of modern microprocessors. To reduce penalty brought by branch instruction as far as possible is a hotspot for researching high-performance microprocessors. In this paper, we discuss the effect of efficiency brought by conditional branch instruction and concerned processing technology, and analysis the design policy of branch prediction for modern microprocessors.