2.How many types can the 80x86 instructions be divided into?

80x86的指令可分为多少类型?8 类!
80x86 instructions can be (roughly) divided into EIGHT different types:
1) Data movement instructions
mov,lea,les ,push,pop,pushf,popf
2) Conversions
cbw,cwd,xlat
3) Arithmetic instructions
add,inc sub,dec,cmp,neg,mul,imul,div,idiv
4) Logical,shift,rotate,and bit instructions
and,or,xor,not,shl,shr,rcl,rcr
5) I/O instructions
in,out
6) String instructions
movs,stos,lods
7) Program flow control instructions
jmp,call,ret,conditional jumps
8) Miscellaneous instructions.
clc,stc,cmc