?? 2.4.3雙字節(jié)有符號(hào)數(shù)除法.txt
字號(hào):
FPDI:
MOV A,R4
JZ OV3
CPL A
INC A
MOV R4,A
MOV A,R0
JNZ D1
AJMP G0
D1:
ACALL DP
JZ OV3
JC OV3
ORL 09H,#80H
ORL 0DH,#80H
FPD3:
ACALL EXT
MOV R0,#19H
ACALL SUB0
XCH A,R5
SUBB A,R1
JC D2
INC R4
CJNE R4,#0,D3
OV3:
LJMP 0FFFFH
D2:
ACALL ADD0
ADDC A,R1
LOOP2:
ACALL ADD2
RLC A
JC D4
ACALL SUB0
SUBB A,R1
JNC D3
ACALL ADD0
ADDC A,R1
SJMP D3
D4:
ACALL SUB0
SUBB A,R1
CLR C
D3:
DJNZ R0,D5
MOV R5,1DH
MOV R6,1EH
MOV R7,1FH
JC COM3
ACALL
INC 3
COM3:
JBC 7EH,DON3
ANL 0DH,#7FH
DON3:
RET
D5:
CPL C
CPL RS1
ACALL H0
CPL RS1
SJMP LOOP2
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