mov al, var[2] 例:64位数据移位 mov var[3, al mov a var mov var[21, al mov al, var[o] 图示 mov var moⅴ byte ptr var[0],0 mov ah. 4ch int 21h code ends end start 1234567887654321h 移位后345678876432100hmov al, var[2] mov var[3],al mov al, var[1] mov var[2],al mov al, var[0] mov var[1],al mov byte ptr var[0],0 mov ah,4ch int 21h code ends end start 12 34 56 78 87 65 43 21h 移位后 34 56 78 87 65 43 21 00h 图示 例:64位数据移位