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