我一直以为,CPU的CISC架构既然叫做“复杂指令集”,就当然比RISC架构(精简指令集)复杂。现在才知道错了,CISC的代码更简单。CISC是把各种复杂操作都封装成CPU指令,而RISC只提供基本指令(可在一个时钟周期完成),所以前者的汇编程序更短。这也是CISC性能高于RISC的原因,因为内存消耗少。
https://twitter.com/ruanyf/status/1317797659483070465
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