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7 的代码
7.2.5反正切函数.txt
FATN:
MOV A,@R0
MOV C,ACC.7
MOV 1DH,C
CLR ACC.7
MOV @R0,A
CLR 1CH
JB ACC.6,ATN1
JZ ATN1
SETB 1CH
LCALL FRCP
ATN1:
FPLN:
POP DPH
POP DPL
7.1.6浮点符号函数.txt
FLTSGN:
INC R0
MOV A,@R0
INC R0
ORL A,@R0
DEC R0
DEC R0
JNZ SGN
RET
SGN:
MOV A,@R0
RLC A
MOV A,#1
JNC SGN1
MOV A,#0FFH
SGN1:
RET
7.1.8浮点倒数函数.txt
FRCP:
MOV A,@R0
MOV C,ACC.7
MOV 1FH,C
MOV C,ACC.6
MOV ACC.7,C
MOV R5,A
INC R0
MOV A,@R0
MOV R6,A
INC R0
MOV A,@R0
MOV R7,A
DEC R0
DEC R0
ORL A,R6
JNZ RCP