2 NetWinder Floating Point Emulator
3 (c) Rebel.COM, 1998,1999
5 Direct questions, comments to Scott Bambrough <scottb@netwinder.org>
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include "softfloat.h"
26 floatx80 floatx80_exp(floatx80 Fm);
27 floatx80 floatx80_ln(floatx80 Fm);
28 floatx80 floatx80_sin(floatx80 rFm);
29 floatx80 floatx80_cos(floatx80 rFm);
30 floatx80 floatx80_arcsin(floatx80 rFm);
31 floatx80 floatx80_arctan(floatx80 rFm);
32 floatx80 floatx80_log(floatx80 rFm);
33 floatx80 floatx80_tan(floatx80 rFm);
34 floatx80 floatx80_arccos(floatx80 rFm);
35 floatx80 floatx80_pow(floatx80 rFn,floatx80 rFm);
36 floatx80 floatx80_pol(floatx80 rFn,floatx80 rFm);
38 unsigned int ExtendedCPDO(const unsigned int opcode)
40 FPA11 *fpa11 = GET_FPA11();
42 unsigned int Fd, Fm, Fn, nRc = 1;
44 //printk("ExtendedCPDO(0x%08x)\n",opcode);
47 if (CONSTANT_FM(opcode))
49 rFm = getExtendedConstant(Fm);
53 switch (fpa11->fType[Fm])
56 rFm = float32_to_floatx80(fpa11->fpreg[Fm].fSingle);
60 rFm = float64_to_floatx80(fpa11->fpreg[Fm].fDouble);
64 rFm = fpa11->fpreg[Fm].fExtended;
71 if (!MONADIC_INSTRUCTION(opcode))
74 switch (fpa11->fType[Fn])
77 rFn = float32_to_floatx80(fpa11->fpreg[Fn].fSingle);
81 rFn = float64_to_floatx80(fpa11->fpreg[Fn].fDouble);
85 rFn = fpa11->fpreg[Fn].fExtended;
93 switch (opcode & MASK_ARITHMETIC_OPCODE)
97 fpa11->fpreg[Fd].fExtended = floatx80_add(rFn,rFm);
102 fpa11->fpreg[Fd].fExtended = floatx80_mul(rFn,rFm);
106 fpa11->fpreg[Fd].fExtended = floatx80_sub(rFn,rFm);
110 fpa11->fpreg[Fd].fExtended = floatx80_sub(rFm,rFn);
115 fpa11->fpreg[Fd].fExtended = floatx80_div(rFn,rFm);
120 fpa11->fpreg[Fd].fExtended = floatx80_div(rFm,rFn);
125 fpa11->fpreg[Fd].fExtended = floatx80_pow(rFn,rFm);
129 fpa11->fpreg[Fd].fExtended = floatx80_pow(rFm,rFn);
134 fpa11->fpreg[Fd].fExtended = floatx80_rem(rFn,rFm);
139 fpa11->fpreg[Fd].fExtended = floatx80_pol(rFn,rFm);
143 /* monadic opcodes */
145 fpa11->fpreg[Fd].fExtended = rFm;
150 fpa11->fpreg[Fd].fExtended = rFm;
155 fpa11->fpreg[Fd].fExtended = rFm;
160 fpa11->fpreg[Fd].fExtended = floatx80_round_to_int(rFm);
164 fpa11->fpreg[Fd].fExtended = floatx80_sqrt(rFm);
169 fpa11->fpreg[Fd].fExtended = floatx80_log(rFm);
173 fpa11->fpreg[Fd].fExtended = floatx80_ln(rFm);
177 fpa11->fpreg[Fd].fExtended = floatx80_exp(rFm);
181 fpa11->fpreg[Fd].fExtended = floatx80_sin(rFm);
185 fpa11->fpreg[Fd].fExtended = floatx80_cos(rFm);
189 fpa11->fpreg[Fd].fExtended = floatx80_tan(rFm);
193 fpa11->fpreg[Fd].fExtended = floatx80_arcsin(rFm);
197 fpa11->fpreg[Fd].fExtended = floatx80_arccos(rFm);
201 fpa11->fpreg[Fd].fExtended = floatx80_arctan(rFm);
214 if (0 != nRc) fpa11->fType[Fd] = typeExtended;
219 floatx80 floatx80_exp(floatx80 Fm)
224 floatx80 floatx80_ln(floatx80 Fm)
229 floatx80 floatx80_sin(floatx80 rFm)
234 floatx80 floatx80_cos(floatx80 rFm)
239 floatx80 floatx80_arcsin(floatx80 rFm)
244 floatx80 floatx80_arctan(floatx80 rFm)
249 floatx80 floatx80_log(floatx80 rFm)
251 return floatx80_div(floatx80_ln(rFm),getExtendedConstant(7));
254 floatx80 floatx80_tan(floatx80 rFm)
256 return floatx80_div(floatx80_sin(rFm),floatx80_cos(rFm));
259 floatx80 floatx80_arccos(floatx80 rFm)
261 //return floatx80_sub(halfPi,floatx80_arcsin(rFm));
264 floatx80 floatx80_pow(floatx80 rFn,floatx80 rFm)
266 return floatx80_exp(floatx80_mul(rFm,floatx80_ln(rFn)));
269 floatx80 floatx80_pol(floatx80 rFn,floatx80 rFm)
271 return floatx80_arctan(floatx80_div(rFn,rFm));