DUDIV       MOVLW       .16         ;循环16次
            MOVWF       CNT
            CLRF        TEMP2
            CLRF        TEMP1       ;TEMP2:TEMP1得到余数
            BCF         STATUS,C
            RLF         SOU,F
            RLF         SOUH,F
            RLF         TEMP1,F
            RLF         TEMP2,F
LOOP79      MOVF        RLTH,W
            SUBWF       TEMP2,W     ;检测是否余数大于除数
            BTFSS       STATUS,Z
            GOTO        NOCHK
            MOVF        RLT,W
            SUBWF       TEMP1,W     ;如果高位相等则检测低位
NOCHK       BTFSS       STATUS,C   
            GOTO        NOGO
            MOVF        RLT,W       ;余数减除数
            SUBWF       TEMP1,F
            BTFSS       STATUS,C
            DECF        TEMP2,F
            MOVF        RLTH,W
            SUBWF       TEMP2,F
            BSF         STATUS,C    ;结果中移入1
NOGO        RLF         SOU,F
            RLF         SOUH,F
            RLF         TEMP1,F
            RLF         TEMP2,F
            DECFSZ      CNT,F       
            GOTO        LOOP79