chengfa.asm

汇编设计 乘法指令 用十六位成一十六位 结果三十而位

data       segment
           n1 dw 1541h
           n2 dw 6D92h
           n3 dw 317Ah
           n4 dw 1531h
data       ends
code      segment
           assume cs:code,ds:data
start:      mov ax,data
              mov ds,ax
              mov ax,n1
              mul n3
              push dx
              push ax
              mov ax,n1
              mul n4
              push dx
              push ax
              mov ax,n2
              mul n3
              mov cx,ax
              mov bx,dx
              mov ax,n2
              mul n4
              add dx,cx
              adc bx,0
              pop cx
              add dx,cx
              pop cx
              adc cx,bx
              pop bx
              add cx,bx
              pop bx
              adc bx,0  
              mov ah,4ch
              int 21h
code      ends
              end start