1、前言精减指令集计算机(RISC)的概念是70年代后期提出的,美国柏克利大学的 Patterson 教授和斯坦福大学的 John Hennessy 教授当时提出:程序员真正需要的是那些只花相当少机器周期的简单指令。当达到任何一条指令不超过一个机器周 1. INTRODUCTION The concept of Reduced Instruction Set Computer (RISC) was proposed in the late 1970s. Professor Patterson of the University of Berkeley and Professor John Hennessy of Stanford University proposed at the time that programmers really need those who only spend a relatively small number of machine cycles Simple instructions. When reaching any one instruction no more than one machine week