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 float64 float64_exp(float64 Fm);
27 float64 float64_ln(float64 Fm);
28 float64 float64_sin(float64 rFm);
29 float64 float64_cos(float64 rFm);
30 float64 float64_arcsin(float64 rFm);
31 float64 float64_arctan(float64 rFm);
32 float64 float64_log(float64 rFm);
33 float64 float64_tan(float64 rFm);
34 float64 float64_arccos(float64 rFm);
35 float64 float64_pow(float64 rFn,float64 rFm);
36 float64 float64_pol(float64 rFn,float64 rFm);
38 unsigned int DoubleCPDO(const unsigned int opcode)
40 FPA11 *fpa11 = GET_FPA11();
41 float64 rFm, rFn = 0; //FIXME - should be zero?
42 unsigned int Fd, Fm, Fn, nRc = 1;
44 //printk("DoubleCPDO(0x%08x)\n",opcode);
47 if (CONSTANT_FM(opcode))
49 rFm = getDoubleConstant(Fm);
53 switch (fpa11->fType[Fm])
56 rFm = float32_to_float64(fpa11->fpreg[Fm].fSingle);
60 rFm = fpa11->fpreg[Fm].fDouble;
65 //printk("not implemented! why not?\n");
67 // should never get here, if extended involved
68 // then other operand should be promoted then
69 // ExtendedCPDO called.
76 if (!MONADIC_INSTRUCTION(opcode))
79 switch (fpa11->fType[Fn])
82 rFn = float32_to_float64(fpa11->fpreg[Fn].fSingle);
86 rFn = fpa11->fpreg[Fn].fDouble;
94 /* !! this switch isn't optimized; better (opcode & MASK_ARITHMETIC_OPCODE)>>24, sort of */
95 switch (opcode & MASK_ARITHMETIC_OPCODE)
99 fpa11->fpreg[Fd].fDouble = float64_add(rFn,rFm);
104 fpa11->fpreg[Fd].fDouble = float64_mul(rFn,rFm);
108 fpa11->fpreg[Fd].fDouble = float64_sub(rFn,rFm);
112 fpa11->fpreg[Fd].fDouble = float64_sub(rFm,rFn);
117 fpa11->fpreg[Fd].fDouble = float64_div(rFn,rFm);
122 fpa11->fpreg[Fd].fDouble = float64_div(rFm,rFn);
127 fpa11->fpreg[Fd].fDouble = float64_pow(rFn,rFm);
131 fpa11->fpreg[Fd].fDouble = float64_pow(rFm,rFn);
136 fpa11->fpreg[Fd].fDouble = float64_rem(rFn,rFm);
141 fpa11->fpreg[Fd].fDouble = float64_pol(rFn,rFm);
145 /* monadic opcodes */
147 fpa11->fpreg[Fd].fDouble = rFm;
152 unsigned int *p = (unsigned int*)&rFm;
154 fpa11->fpreg[Fd].fDouble = rFm;
160 unsigned int *p = (unsigned int*)&rFm;
162 fpa11->fpreg[Fd].fDouble = rFm;
168 fpa11->fpreg[Fd].fDouble = float64_round_to_int(rFm);
172 fpa11->fpreg[Fd].fDouble = float64_sqrt(rFm);
177 fpa11->fpreg[Fd].fDouble = float64_log(rFm);
181 fpa11->fpreg[Fd].fDouble = float64_ln(rFm);
185 fpa11->fpreg[Fd].fDouble = float64_exp(rFm);
189 fpa11->fpreg[Fd].fDouble = float64_sin(rFm);
193 fpa11->fpreg[Fd].fDouble = float64_cos(rFm);
197 fpa11->fpreg[Fd].fDouble = float64_tan(rFm);
201 fpa11->fpreg[Fd].fDouble = float64_arcsin(rFm);
205 fpa11->fpreg[Fd].fDouble = float64_arccos(rFm);
209 fpa11->fpreg[Fd].fDouble = float64_arctan(rFm);
222 if (0 != nRc) fpa11->fType[Fd] = typeDouble;
227 float64 float64_exp(float64 rFm)
233 float64 float64_ln(float64 rFm)
239 float64 float64_sin(float64 rFm)
245 float64 float64_cos(float64 rFm)
252 float64 float64_arcsin(float64 rFm)
257 float64 float64_arctan(float64 rFm)
263 float64 float64_log(float64 rFm)
265 return float64_div(float64_ln(rFm),getDoubleConstant(7));
268 float64 float64_tan(float64 rFm)
270 return float64_div(float64_sin(rFm),float64_cos(rFm));
273 float64 float64_arccos(float64 rFm)
276 //return float64_sub(halfPi,float64_arcsin(rFm));
279 float64 float64_pow(float64 rFn,float64 rFm)
281 return float64_exp(float64_mul(rFm,float64_ln(rFn)));
284 float64 float64_pol(float64 rFn,float64 rFm)
286 return float64_arctan(float64_div(rFn,rFm));