Linux-2.6.12-rc2
[linux-3.10.git] / arch / arm26 / nwfpe / double_cpdo.c
1 /*
2     NetWinder Floating Point Emulator
3     (c) Rebel.COM, 1998,1999
4
5     Direct questions, comments to Scott Bambrough <scottb@netwinder.org>
6
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.
11
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.
16
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.
20 */
21
22 #include "fpa11.h"
23 #include "softfloat.h"
24 #include "fpopcode.h"
25
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);
37
38 unsigned int DoubleCPDO(const unsigned int opcode)
39 {
40    FPA11 *fpa11 = GET_FPA11();
41    float64 rFm, rFn = 0; //FIXME - should be zero?
42    unsigned int Fd, Fm, Fn, nRc = 1;
43
44    //printk("DoubleCPDO(0x%08x)\n",opcode);
45    
46    Fm = getFm(opcode);
47    if (CONSTANT_FM(opcode))
48    {
49      rFm = getDoubleConstant(Fm);
50    }
51    else
52    {  
53      switch (fpa11->fType[Fm])
54      {
55         case typeSingle:
56           rFm = float32_to_float64(fpa11->fpreg[Fm].fSingle);
57         break;
58
59         case typeDouble:
60           rFm = fpa11->fpreg[Fm].fDouble;
61           break;
62
63         case typeExtended:
64             // !! patb
65             //printk("not implemented! why not?\n");
66             //!! ScottB
67             // should never get here, if extended involved
68             // then other operand should be promoted then
69             // ExtendedCPDO called.
70             break;
71
72         default: return 0;
73      }
74    }
75
76    if (!MONADIC_INSTRUCTION(opcode))
77    {
78       Fn = getFn(opcode);
79       switch (fpa11->fType[Fn])
80       {
81         case typeSingle:
82           rFn = float32_to_float64(fpa11->fpreg[Fn].fSingle);
83         break;
84
85         case typeDouble:
86           rFn = fpa11->fpreg[Fn].fDouble;
87         break;
88         
89         default: return 0;
90       }
91    }
92
93    Fd = getFd(opcode);
94    /* !! this switch isn't optimized; better (opcode & MASK_ARITHMETIC_OPCODE)>>24, sort of */
95    switch (opcode & MASK_ARITHMETIC_OPCODE)
96    {
97       /* dyadic opcodes */
98       case ADF_CODE:
99          fpa11->fpreg[Fd].fDouble = float64_add(rFn,rFm);
100       break;
101
102       case MUF_CODE:
103       case FML_CODE:
104          fpa11->fpreg[Fd].fDouble = float64_mul(rFn,rFm);
105       break;
106
107       case SUF_CODE:
108          fpa11->fpreg[Fd].fDouble = float64_sub(rFn,rFm);
109       break;
110
111       case RSF_CODE:
112          fpa11->fpreg[Fd].fDouble = float64_sub(rFm,rFn);
113       break;
114
115       case DVF_CODE:
116       case FDV_CODE:
117          fpa11->fpreg[Fd].fDouble = float64_div(rFn,rFm);
118       break;
119
120       case RDF_CODE:
121       case FRD_CODE:
122          fpa11->fpreg[Fd].fDouble = float64_div(rFm,rFn);
123       break;
124
125 #if 0
126       case POW_CODE:
127          fpa11->fpreg[Fd].fDouble = float64_pow(rFn,rFm);
128       break;
129
130       case RPW_CODE:
131          fpa11->fpreg[Fd].fDouble = float64_pow(rFm,rFn);
132       break;
133 #endif
134
135       case RMF_CODE:
136          fpa11->fpreg[Fd].fDouble = float64_rem(rFn,rFm);
137       break;
138
139 #if 0
140       case POL_CODE:
141          fpa11->fpreg[Fd].fDouble = float64_pol(rFn,rFm);
142       break;
143 #endif
144
145       /* monadic opcodes */
146       case MVF_CODE:
147          fpa11->fpreg[Fd].fDouble = rFm;
148       break;
149
150       case MNF_CODE:
151       {
152          unsigned int *p = (unsigned int*)&rFm;
153          p[1] ^= 0x80000000;
154          fpa11->fpreg[Fd].fDouble = rFm;
155       }
156       break;
157
158       case ABS_CODE:
159       {
160          unsigned int *p = (unsigned int*)&rFm;
161          p[1] &= 0x7fffffff;
162          fpa11->fpreg[Fd].fDouble = rFm;
163       }
164       break;
165
166       case RND_CODE:
167       case URD_CODE:
168          fpa11->fpreg[Fd].fDouble = float64_round_to_int(rFm);
169       break;
170
171       case SQT_CODE:
172          fpa11->fpreg[Fd].fDouble = float64_sqrt(rFm);
173       break;
174
175 #if 0
176       case LOG_CODE:
177          fpa11->fpreg[Fd].fDouble = float64_log(rFm);
178       break;
179
180       case LGN_CODE:
181          fpa11->fpreg[Fd].fDouble = float64_ln(rFm);
182       break;
183
184       case EXP_CODE:
185          fpa11->fpreg[Fd].fDouble = float64_exp(rFm);
186       break;
187
188       case SIN_CODE:
189          fpa11->fpreg[Fd].fDouble = float64_sin(rFm);
190       break;
191
192       case COS_CODE:
193          fpa11->fpreg[Fd].fDouble = float64_cos(rFm);
194       break;
195
196       case TAN_CODE:
197          fpa11->fpreg[Fd].fDouble = float64_tan(rFm);
198       break;
199
200       case ASN_CODE:
201          fpa11->fpreg[Fd].fDouble = float64_arcsin(rFm);
202       break;
203
204       case ACS_CODE:
205          fpa11->fpreg[Fd].fDouble = float64_arccos(rFm);
206       break;
207
208       case ATN_CODE:
209          fpa11->fpreg[Fd].fDouble = float64_arctan(rFm);
210       break;
211 #endif
212
213       case NRM_CODE:
214       break;
215       
216       default:
217       {
218         nRc = 0;
219       }
220    }
221
222    if (0 != nRc) fpa11->fType[Fd] = typeDouble;
223    return nRc;
224 }
225
226 #if 0
227 float64 float64_exp(float64 rFm)
228 {
229   return rFm;
230 //series
231 }
232
233 float64 float64_ln(float64 rFm)
234 {
235   return rFm;
236 //series
237 }
238
239 float64 float64_sin(float64 rFm)
240 {
241   return rFm;
242 //series
243 }
244
245 float64 float64_cos(float64 rFm)
246 {
247    return rFm;
248    //series
249 }
250
251 #if 0
252 float64 float64_arcsin(float64 rFm)
253 {
254 //series
255 }
256
257 float64 float64_arctan(float64 rFm)
258 {
259   //series
260 }
261 #endif
262
263 float64 float64_log(float64 rFm)
264 {
265   return float64_div(float64_ln(rFm),getDoubleConstant(7));
266 }
267
268 float64 float64_tan(float64 rFm)
269 {
270   return float64_div(float64_sin(rFm),float64_cos(rFm));
271 }
272
273 float64 float64_arccos(float64 rFm)
274 {
275 return rFm;
276    //return float64_sub(halfPi,float64_arcsin(rFm));
277 }
278
279 float64 float64_pow(float64 rFn,float64 rFm)
280 {
281   return float64_exp(float64_mul(rFm,float64_ln(rFn))); 
282 }
283
284 float64 float64_pol(float64 rFn,float64 rFm)
285 {
286   return float64_arctan(float64_div(rFn,rFm)); 
287 }
288 #endif