;1定点数规格化 FXDN: LD 2CH,#40A0H LOOP: JBS 2BH,7,LOOP1 SHLL 24H,#1 ADDC 28H,28H ADDC 2AH,2AH DECB 2CH DJNZ 2DH,LOOP CLR 2CH;0 LOOP1: RET 2定点数规格化实例 FLTRLN: MOV A,R3 ORL A,R4 JNZ RLN1 MOV R2,#0C1H RET RLN1: MOV A,R3 JB ACC.7,RLN2 CLR C LCALL RL1 SJMP RLN RLN2: CLR OV RET