Instruction set
Y86 指令集
运算符:addl, subl, andl, and xorl
跳转符:jmp,jle,jl,je,jne,jge, andjg
条件符:cmovle, cmovl, cmove, cmovne, cmovge,cmovg
其它:call , pushl,popl, halt
Registers
%eax, %ecx, %edx, %ebx, %esi, %edi, %esp, %ebp
当中栈指针存在%esp
PC存放当前指令的地址
Condition code (状态码)
1. 指令运行正常
2. 挂起
3. 读写非法地址
4. 非法指令
Instruction encoding
指令集编码。汇编指令集被运行前。寄存器会被编码:
比如。addl %esi %eax 会被编码为 addl 6 0
Logic control (execution)
ALU
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Clocked register
时钟信号存放寄存器载入情况。
Random Access memory
1.Register file (寄存器)
寄存器的读写
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2.Virtual memory (内存)
Instruction processing
指令处理分为Fetch, Decode, Execute, Write Memory 和PC update 五个阶段.
指令处理过程:
Fetch -> decode -> execute -> write back -> PC update(point to next instruction address)
Instruction Cycling processing
CPU时钟轮训拉取。编码。处理每一个指令,回写下一个指令地址:
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