LOOP指令(0502)

例：编程计算2^12

assume cs:code
code segment
     mov ax,2
     mov cx,11
  s: add ax,ax
     loop s

     mov ax,4c00h
     int 21h
code ends
end

问题：计算123x236，结果存储在ax中

方法：用加法实现乘法，将123连加236次

assume cs:code
code segment
    mov ax,0
    mov cx,236
 s: add ax,123
    loop s

    mov ax,4c00h
    int 21h
code ends
end