用一段程序段完成REP MOVSW的指令功能

DATA1 SEGMENT
DA1 DW 5 DUP(?)
DATA1 ENDS
DATA2 SEGMENT
DA2 DW 5 DUP(?)
DATA2 ENDS
CODE SEGMENT 'CODE'
ASSUME CS:CODE,DS:DATA1,ES:DATA2
START: MOV AX,DATA1
MOV DS,AX
MOV AX,DATA2
MOV ES,AX
LEA SI,DA1
LEA DI,DA2
MOV CX,5
LP1: MOV AX,[SI]
MOV ES:[DI],AX
INC SI
INC SI
INC DI
INC DI
LOOP LP1
MOV AH,4CH
INT 21H
CODE ENDS
END START