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, see <http://www.gnu.org/licenses/>.
22 #include "fpu/softfloat.h"
25 float64 float64_exp(float64 Fm);
26 float64 float64_ln(float64 Fm);
27 float64 float64_sin(float64 rFm);
28 float64 float64_cos(float64 rFm);
29 float64 float64_arcsin(float64 rFm);
30 float64 float64_arctan(float64 rFm);
31 float64 float64_log(float64 rFm);
32 float64 float64_tan(float64 rFm);
33 float64 float64_arccos(float64 rFm);
34 float64 float64_pow(float64 rFn,float64 rFm);
35 float64 float64_pol(float64 rFn,float64 rFm);
37 unsigned int DoubleCPDO(const unsigned int opcode)
39 FPA11 *fpa11 = GET_FPA11();
40 float64 rFm, rFn = float64_zero;
41 unsigned int Fd, Fm, Fn, nRc = 1;
43 //printk("DoubleCPDO(0x%08x)\n",opcode);
46 if (CONSTANT_FM(opcode))
48 rFm = getDoubleConstant(Fm);
52 switch (fpa11->fType[Fm])
55 rFm = float32_to_float64(fpa11->fpreg[Fm].fSingle, &fpa11->fp_status);
59 rFm = fpa11->fpreg[Fm].fDouble;
64 //printk("not implemented! why not?\n");
66 // should never get here, if extended involved
67 // then other operand should be promoted then
68 // ExtendedCPDO called.
75 if (!MONADIC_INSTRUCTION(opcode))
78 switch (fpa11->fType[Fn])
81 rFn = float32_to_float64(fpa11->fpreg[Fn].fSingle, &fpa11->fp_status);
85 rFn = fpa11->fpreg[Fn].fDouble;
93 /* !! this switch isn't optimized; better (opcode & MASK_ARITHMETIC_OPCODE)>>24, sort of */
94 switch (opcode & MASK_ARITHMETIC_OPCODE)
98 fpa11->fpreg[Fd].fDouble = float64_add(rFn,rFm, &fpa11->fp_status);
103 fpa11->fpreg[Fd].fDouble = float64_mul(rFn,rFm, &fpa11->fp_status);
107 fpa11->fpreg[Fd].fDouble = float64_sub(rFn,rFm, &fpa11->fp_status);
111 fpa11->fpreg[Fd].fDouble = float64_sub(rFm,rFn, &fpa11->fp_status);
116 fpa11->fpreg[Fd].fDouble = float64_div(rFn,rFm, &fpa11->fp_status);
121 fpa11->fpreg[Fd].fDouble = float64_div(rFm,rFn, &fpa11->fp_status);
126 fpa11->fpreg[Fd].fDouble = float64_pow(rFn,rFm);
130 fpa11->fpreg[Fd].fDouble = float64_pow(rFm,rFn);
135 fpa11->fpreg[Fd].fDouble = float64_rem(rFn,rFm, &fpa11->fp_status);
140 fpa11->fpreg[Fd].fDouble = float64_pol(rFn,rFm);
144 /* monadic opcodes */
146 fpa11->fpreg[Fd].fDouble = rFm;
151 unsigned int *p = (unsigned int*)&rFm;
152 #ifdef HOST_WORDS_BIGENDIAN
157 fpa11->fpreg[Fd].fDouble = rFm;
163 unsigned int *p = (unsigned int*)&rFm;
164 #ifdef HOST_WORDS_BIGENDIAN
169 fpa11->fpreg[Fd].fDouble = rFm;
175 fpa11->fpreg[Fd].fDouble = float64_round_to_int(rFm, &fpa11->fp_status);
179 fpa11->fpreg[Fd].fDouble = float64_sqrt(rFm, &fpa11->fp_status);
184 fpa11->fpreg[Fd].fDouble = float64_log(rFm);
188 fpa11->fpreg[Fd].fDouble = float64_ln(rFm);
192 fpa11->fpreg[Fd].fDouble = float64_exp(rFm);
196 fpa11->fpreg[Fd].fDouble = float64_sin(rFm);
200 fpa11->fpreg[Fd].fDouble = float64_cos(rFm);
204 fpa11->fpreg[Fd].fDouble = float64_tan(rFm);
208 fpa11->fpreg[Fd].fDouble = float64_arcsin(rFm);
212 fpa11->fpreg[Fd].fDouble = float64_arccos(rFm);
216 fpa11->fpreg[Fd].fDouble = float64_arctan(rFm);
229 if (0 != nRc) fpa11->fType[Fd] = typeDouble;
234 float64 float64_exp(float64 rFm)
240 float64 float64_ln(float64 rFm)
246 float64 float64_sin(float64 rFm)
252 float64 float64_cos(float64 rFm)
259 float64 float64_arcsin(float64 rFm)
264 float64 float64_arctan(float64 rFm)
270 float64 float64_log(float64 rFm)
272 return float64_div(float64_ln(rFm),getDoubleConstant(7));
275 float64 float64_tan(float64 rFm)
277 return float64_div(float64_sin(rFm),float64_cos(rFm));
280 float64 float64_arccos(float64 rFm)
283 //return float64_sub(halfPi,float64_arcsin(rFm));
286 float64 float64_pow(float64 rFn,float64 rFm)
288 return float64_exp(float64_mul(rFm,float64_ln(rFn)));
291 float64 float64_pol(float64 rFn,float64 rFm)
293 return float64_arctan(float64_div(rFn,rFm));