v2.4.8 -> v2.4.8.1
[opensuse:kernel.git] / arch / arm / 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 "softfloat.h"
23 #include "fpopcode.h"
24 #include "fpa11.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;
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 = 
169              int32_to_float64(float64_to_int32(rFm));
170       break;
171
172       case SQT_CODE:
173          fpa11->fpreg[Fd].fDouble = float64_sqrt(rFm);
174       break;
175
176 #if 0
177       case LOG_CODE:
178          fpa11->fpreg[Fd].fDouble = float64_log(rFm);
179       break;
180
181       case LGN_CODE:
182          fpa11->fpreg[Fd].fDouble = float64_ln(rFm);
183       break;
184
185       case EXP_CODE:
186          fpa11->fpreg[Fd].fDouble = float64_exp(rFm);
187       break;
188
189       case SIN_CODE:
190          fpa11->fpreg[Fd].fDouble = float64_sin(rFm);
191       break;
192
193       case COS_CODE:
194          fpa11->fpreg[Fd].fDouble = float64_cos(rFm);
195       break;
196
197       case TAN_CODE:
198          fpa11->fpreg[Fd].fDouble = float64_tan(rFm);
199       break;
200
201       case ASN_CODE:
202          fpa11->fpreg[Fd].fDouble = float64_arcsin(rFm);
203       break;
204
205       case ACS_CODE:
206          fpa11->fpreg[Fd].fDouble = float64_arccos(rFm);
207       break;
208
209       case ATN_CODE:
210          fpa11->fpreg[Fd].fDouble = float64_arctan(rFm);
211       break;
212 #endif
213
214       case NRM_CODE:
215       break;
216       
217       default:
218       {
219         nRc = 0;
220       }
221    }
222
223    if (0 != nRc) fpa11->fType[Fd] = typeDouble;
224    return nRc;
225 }
226
227 #if 0
228 float64 float64_exp(float64 rFm)
229 {
230   return rFm;
231 //series
232 }
233
234 float64 float64_ln(float64 rFm)
235 {
236   return rFm;
237 //series
238 }
239
240 float64 float64_sin(float64 rFm)
241 {
242   return rFm;
243 //series
244 }
245
246 float64 float64_cos(float64 rFm)
247 {
248    return rFm;
249    //series
250 }
251
252 #if 0
253 float64 float64_arcsin(float64 rFm)
254 {
255 //series
256 }
257
258 float64 float64_arctan(float64 rFm)
259 {
260   //series
261 }
262 #endif
263
264 float64 float64_log(float64 rFm)
265 {
266   return float64_div(float64_ln(rFm),getDoubleConstant(7));
267 }
268
269 float64 float64_tan(float64 rFm)
270 {
271   return float64_div(float64_sin(rFm),float64_cos(rFm));
272 }
273
274 float64 float64_arccos(float64 rFm)
275 {
276 return rFm;
277    //return float64_sub(halfPi,float64_arcsin(rFm));
278 }
279
280 float64 float64_pow(float64 rFn,float64 rFm)
281 {
282   return float64_exp(float64_mul(rFm,float64_ln(rFn))); 
283 }
284
285 float64 float64_pol(float64 rFn,float64 rFm)
286 {
287   return float64_arctan(float64_div(rFn,rFm)); 
288 }
289 #endif