正在读ProgrammingGroundUp,有一句话不知什么意思

waterloo2005

Note that on x86 processors, even the general-purpose registers have some special pur-
poses, or used to before it went 32-bit.
这事第25页注脚中的一句话
谢谢

lzlz

Although the main registers are "general-purpose" and can be used for anything, it was envisaged that they be used for the following purposes:
   * AX/EAX/RAX: accumulator
    * BX/EBX/RBX: base
    * CX/ECX/RCX: counter
    * DX/EDX/RDX: data/general
    * SI/ESI/RSI: "source index" for string operations.
    * DI/EDI/RDI: "destination index" for string operations.
    * SP/ESP/RSP: stack pointer for top address of the stack.
    * BP/EBP/RBP: stack base pointer for holding the address of the current stack frame.
    * IP/EIP/RIP: instruction pointer. Holds the current instruction address.

from: http://en.wikipedia.org/wiki/X86#Purpose

zhllg

used to
曾经

waterloo2005

Post by zhllg;1932272
used to
曾经

在进入32位以前也是这样

谢谢

waterloo2005

Other instructions may have an operand hardcoded in.
又碰到一句不懂的，请问这是什么意思？谢谢

kpld

translate.google.com

waterloo2005

Post by kpld;1932305
translate.google.com

这个不靠普吧

zhllg

you know what is operand?
what is hardcode?

waterloo2005

谢谢，你很善于启发新手哦

laonainai

Note that on x86 processors, even the general-purpose registers have some special purposes, or used to before it went 32-bit.

需要注意的是在x86处理器中，所谓的通用寄存器也会有特殊的用途，至少在x86系列的CPU变成32位以前是这样。