;32為浮點數向24位圓整
           IFNDEF       RND32241
            #DEFINE     RND32241
RND3224     BTFSS       AARGB2,MSB  ;保留字 NSB < 0x80?
            RETLW       0x00
            BSF         STATUS,C    ;進位位置1以便圓整
            MOVLW       0x7F
            ANDWF       AARGB2,W
            BTFSC       STATUS,Z
            RRF         AARGB1,W    ;select even if NSB = 0x80
            MOVF        AARGB0,W
            MOVWF       SIGN        ;保存符號位
            BSF         AARGB0,MSB  ;顯露最高位的1
            BCF         STATUS,Z
            BTFSC       STATUS,C    ;圓整
            INCF        AARGB1,F
            BTFSC       STATUS,Z
            INCF        AARGB0,F		
            BTFSS       STATUS,Z    ;圓整導致進位溢出?
            GOTO        RND3224OK
            RRF         AARGB0,F    ;如果是這樣則右移
            RRF         AARGB1,F
            INCF        EXP,F       ;檢測有無上溢
            BTFSC       STATUS,Z
            GOTO        SETFOV
RND3224OK   BTFSS       SIGN,MSB
            BCF         AARGB0,MSB  ;如果是正數則隱藏最高位
            RETLW       0x00
           ENDIF