CPU

约 62 个字

Introduction

CPU performance factors: * Instruction Count:Determined by ISA and compiler * CPI and cycle time:Determined by CPU hardware

Instruction Excution: 1. fectch instructions from memory(according to PC) 2. read registers according to register numbers 3. depending on instruction class * Use ALU to calculate * Arithmetic result * Memory address for load/store * Branch target address * Access data memory for load/store * PC $\leftarrow $ target address on PC + 4