说明：  指令集依照机器操作码、汇编助记符和汇编操作数来描述指令，方便汇编指令查看，怀旧。现在是64位了，只能用于参考。64位有了兼容性扩展
(Instruction set describes instructions according to machine operation code, assembly mnemonics and assembly operands, which is convenient for assembly instructions to view and recall. Now it's 64 bit and can only be used for reference. 64 bit with compatibility extension)