📄 21ic 电子工程师俱乐部 二进制除法.mht
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<TD style=3D"FONT-SIZE: 12px; LINE-HEIGHT: 18px">/* =
=B9=A6=C4=DC: 16=CE=BB=CE=DE=B7=FB=BA=C5=CA=FD =B3=CB=20
8=CE=BB=CE=DE=B7=FB=BA=C5=CA=FD. =CB=B5=C3=F7: =
=B8=C3=BC=C6=CB=E3=B7=BD=B7=A8=CE=AA=CA=D6=B9=A4=B3=CB=B7=A8=BC=C6=CB=E3=B5=
=C4=B3=CC=D0=F2=B0=E6. =D7=A2=D2=E2: =
=B2=BB=B6=D4=D2=E7=B3=F6=D7=F6=B3=F6=B4=A6=C0=ED. =CA=E4=C8=EB: =
16=CE=BB=B1=BB=B3=CB=CA=FD X. 8=CE=BB=B3=CB=CA=FD Y.=20
=CA=E4=B3=F6: 16=CE=BB=CE=DE=B7=FB=BA=C5=BD=E1=B9=FB Z. */ =
unsigned int Mul_16Bit(unsigned int X,unsigned=20
char Y) {unsigned int Z; unsigned char i; Z =3D 0x0000; i =
=3D 0x00; do {=20
Y >>=3D 1; if (CY) { Z +=3D X; } Z >>=3D 1; if =
(CY) { Z |=3D=20
0x8000; /* =CF=E0=B5=B1=D3=DA=D1=AD=BB=B7=D3=D2=D2=C6 */ } =
}while(++i < 16); return(Z); } /* =B9=A6=C4=DC:=20
16=CE=BB=CE=DE=B7=FB=BA=C5=CA=FDX =B3=FD=D2=D4 =
16=CE=BB=CE=DE=B7=FB=BA=C5=CA=FDY. =CB=B5=C3=F7: =
=B8=C3=BC=C6=CB=E3=B7=BD=B7=A8=CE=AA=CA=D6=B9=A4=B3=FD=B7=A8=BC=C6=CB=E3=B5=
=C4=B3=CC=D0=F2=B0=E6,=B5=AB=D3=A6=D7=A2=D2=E2=C6=E4=D6=B4=D0=D0=CA=B1=BC=
=E4=B5=C4=CF=DE=D6=C6. =D7=A2=D2=E2: =B3=FD=CA=FD Y=20
=B2=BB=C4=DC=CE=AA0. =CA=E4=C8=EB: =B1=BB=B3=FD=CA=FD X. =
=B3=FD=CA=FD Y. =CA=E4=B3=F6: 16=CE=BB=CE=DE=B7=FB=BA=C5=BD=E1=B9=FB Z =
(=D3=E0=CA=FD=D4=DA X =D6=D0). */ unsigned int=20
Div_16Bit(unsigned int X,unsigned int Y) {unsigned char i; =
unsigned=20
int Z,Tmp,k; k =3D 0x0001; for (i=3D1; i<=3D16; ++i) /* =
=CF=C8=BD=AB=B3=FD=CA=FD=D7=F3=D2=C6=D3=EB"=B1=BB=B3=FD=CA=FD=B6=D4=C6=E4=
"=20
*/ { Tmp =3D Y << 1; if (CY) { break; } Y =3D Tmp; k =
<<=3D 1;=20
} Z =3D 0x0000; for ( ; i>0; --i) {if (X >=3D Y) { X =
-=3D Y; Z |=3D k;=20
} Y >>=3D 1; k >>=3D 1; } return(Z); } /* =
=C8=FD=BD=C7=BA=AF=CA=FD=CF=B5=C1=D0. */ #define=20
PI_DIV_BY_TWO 1.570796326794896 // Pi / 2. /* =B9=A6=C4=DC: =
=D3=E0=CF=D2=BC=C6=CB=E3=BA=AF=CA=FD. =CA=E4=C8=EB: =BB=A1=B6=C8=D6=B5.=20
=CA=E4=B3=F6: =BC=C6=CB=E3=BD=E1=B9=FB. */ float cos(float =
x) { float y, t, t2 =3D 1.0; int quad, i;=20
float frac; float p[4] =3D { -0.499999993585, =
0.041666636258,=20
-0.0013888361399, 0.00002476016134 }; if (x < 0) x =3D =
-x; //=20
absolute value of input quad =3D (int)(x / PI_DIV_BY_TWO); =
// quadrant=20
frac =3D (x / PI_DIV_BY_TWO) - quad; // fractional part of =
input quad=20
=3D quad % 4; // quadrant (0 to 3) if (quad =3D=3D 0 || quad =
=3D=3D 2) t =3D=20
frac * PI_DIV_BY_TWO; else if (quad =3D=3D 1) t =3D (1-frac) =
*=20
PI_DIV_BY_TWO; else // should be 3 t =3D (frac-1) * =
PI_DIV_BY_TWO; y =3D=20
0.999999999781; t =3D t * t; for (i =3D 0; i <=3D 3; i++) =
{ t2 =3D t2 *=20
t; y =3D y + p[i] * t2; } if (quad =3D=3D 2 || quad =3D=3D =
1) y =3D -y; //=20
correct sign return (y); } /* =B9=A6=C4=DC: =
=D5=FD=CF=D2=BC=C6=CB=E3=BA=AF=CA=FD. =CA=E4=C8=EB: =BB=A1=B6=C8=D6=B5. =
=CA=E4=B3=F6: =BC=C6=CB=E3=BD=E1=B9=FB. */=20
float sin(float x) { return cos(x - PI_DIV_BY_TWO); } /* =
=B9=A6=C4=DC: =D5=FD=C7=D0=BC=C6=CB=E3=BA=AF=CA=FD.=20
=CA=E4=C8=EB: =BB=A1=B6=C8=D6=B5. =CA=E4=B3=F6: =
=BC=C6=CB=E3=BD=E1=B9=FB. */ float tan(float x) { float c, s; c =3D =
cos(x);=20
if (c =3D=3D 0.0) return (1.0e+36); s =3D sin(x); =
return(s/c); } <BR><BR>
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<TD bgColor=3Dwhite><B><IMG=20
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align=3DabsMiddle> crm_here </B>=B7=A2=B1=ED=D3=DA <FONT=20
color=3D#336699><STRONG>=D9=A9=B5=A5=C6=AC=BB=FA</STRONG></FONT> =
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here"=20
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alt=3D=B0=B4=B4=CB=B2=EC=BF=B4=B8=C3=CD=F8=D3=D1=B5=C4=D7=CA=C1=CF=20
src=3D"http://file.21ic.com/club/bbs/images/profile.gif" =
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<TD bgColor=3D#eeeeee><FONT color=3Dblack><BR><U>Thanks very=20
much</U></FONT></TD></TR>
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<TD bgColor=3Dwhite><B><IMG=20
src=3D"http://file.21ic.com/club/bbs/images/emote/mood25.gif"=20
align=3DabsMiddle> guiyang </B>=B7=A2=B1=ED=D3=DA <FONT=20
color=3D#336699><STRONG>=D9=A9=B5=A5=C6=AC=BB=FA</STRONG></FONT> =
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href=3D"http://file.21ic.com/offline/2003/11/list1.htm"><FONT=20
color=3Dblack>=A1=FB=B7=B5=BB=D8=B0=E6=C3=E6</FONT></A> <A=20
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href=3D"http://file.21ic.com/offline/2003/11/queryInfo.asp?txtname=3Dguiy=
ang"=20
target=3D_blank><IMG =
alt=3D=B0=B4=B4=CB=B2=EC=BF=B4=B8=C3=CD=F8=D3=D1=B5=C4=D7=CA=C1=CF=20
src=3D"http://file.21ic.com/club/bbs/images/profile.gif" =
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color=3Dblack><BR><U>=CE=D2=D3=D0=D2=BB=B8=F6=D7=D3=B3=CC=D0=F2=BF=C9=D2=D4=
=BF=B4=BF=B4</U></FONT></TD></TR>
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<TD style=3D"FONT-SIZE: 12px; LINE-HEIGHT: =
18px">=A3=C4=A3=C9=A3=D6=A3=C4 =
=B9=A6=C4=DC=A3=BA=CB=AB=D7=D6=BD=DA=B6=FE=BD=F8=D6=C6=CE=DE=B7=FB=BA=C5=CA=
=FD=B3=FD=B7=A8=20
=
=C8=EB=BF=DA=CC=F5=BC=FE=A3=BA=B1=BB=B3=FD=CA=FD=D4=DAR2=A1=A2R3=A1=A2R4=A1=
=A2R5=D6=D0=A3=AC=B3=FD=CA=FD=D4=DAR6=A1=A2R7=D6=D0=A1=A3 =
=B3=F6=BF=DA=D0=C5=CF=A2=A3=BAOV=3D0 =
=CA=B1=A3=AC=CB=AB=D7=D6=BD=DA=C9=CC=D4=DAR2=A1=A2R3=D6=D0=A3=ACOV=3D1 =
=CA=B1=D2=E7=B3=F6=A1=A3=20
=
=D3=B0=CF=EC=D7=CA=D4=B4=A3=BAPSW=A1=A2A=A1=A2B=A1=A2R1=A1=ABR7 =
=B6=D1=D5=BB=D0=E8=C7=F3=A3=BA =A3=B2=D7=D6=BD=DA DIVD: CLR C =
=A3=BB=B1=C8=BD=CF=B1=BB=B3=FD=CA=FD=BA=CD=B3=FD=CA=FD MOV A,R3 SUBB=20
A,R7 MOV A,R2 SUBB A,R6 JC DVD1 SETB OV =A3=BB=D2=E7=B3=F6 =
RET DVD1: MOV B,#10H=20
=A3=BB=BC=C6=CB=E3=CB=AB=D7=D6=BD=DA=C9=CC DVD2: CLR C =
=A3=BB=B2=BF=B7=D6=C9=CC=BA=CD=D3=E0=CA=FD=CD=AC=CA=B1=D7=F3=D2=C6=D2=BB=CE=
=BB MOV A,R5 RLC A MOV R5,A MOV A,R4=20
RLC A MOV R4,A MOV A,R3 RLC A MOV R3,A XCH A,R2 RLC A XCH =
A,R2 MOV=20
F0,C =A3=BB=B1=A3=B4=E6=D2=E7=B3=F6=CE=BB CLR C SUBB A,R7 =
=A3=BB=BC=C6=CB=E3=A3=A8R2R3=A3=ADR6R7=A3=A9 MOV R1,A MOV A,R2 SUBB=20
A,R6 ANL C,/F0 =A3=BB=BD=E1=B9=FB=C5=D0=B6=CF JC DVD3 MOV =
R2,A =A3=BB=B9=BB=BC=F5=A3=AC=B4=E6=B7=C5=D0=C2=B5=C4=D3=E0=CA=FD MOV =
A,R1 MOV R3,A=20
INC R5 =A3=BB=C9=CC=B5=C4=B5=CD=CE=BB=D6=C3=D2=BB DVD3: DJNZ =
B,DVD2 =A3=BB=BC=C6=CB=E3=CD=EA=CA=AE=C1=F9=CE=BB=C9=CC=A3=A8R4R5=A3=A9 =
MOV A,R4 =A3=BB=BD=AB=C9=CC=D2=C6=B5=BDR2R3=D6=D0=20
MOV R2,A MOV A,R5 MOV R3,A CLR OV =
=A3=BB=C9=E8=C1=A2=B3=C9=B9=A6=B1=EA=D6=BE RET <BR><BR>
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src=3D"http://file.21ic.com/club/bbs/images/emote/mood25.gif"=20
align=3DabsMiddle> =D0=A1=C2=ED </B>=B7=A2=B1=ED=D3=DA <FONT=20
color=3D#336699><STRONG>=D9=A9=B5=A5=C6=AC=BB=FA</STRONG></FONT> =
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href=3D"http://file.21ic.com/offline/2003/11/list1.htm"><FONT=20
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<TD bgColor=3D#eeeeee><FONT =
color=3Dblack><BR><U>=D2=C6=CE=BB=BC=F5=B7=A8=A3=AC=BE=CD=CF=F1=CA=AE=BD=F8=
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