linux-user/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, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "fpa11.h"
  22 #include "softfloat.h"
  23 #include "fpopcode.h"
  24
  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);
  36
  37 unsigned int DoubleCPDO(const unsigned int opcode)
  38 {
  39    FPA11 *fpa11 = GET_FPA11();
  40    float64 rFm, rFn = float64_zero;
  41    unsigned int Fd, Fm, Fn, nRc = 1;
  42
  43    //printk("DoubleCPDO(0x%08x)\n",opcode);
  44
  45    Fm = getFm(opcode);
  46    if (CONSTANT_FM(opcode))
  47    {
  48      rFm = getDoubleConstant(Fm);
  49    }
  50    else
  51    {
  52      switch (fpa11->fType[Fm])
  53      {
  54         case typeSingle:
  55           rFm = float32_to_float64(fpa11->fpreg[Fm].fSingle, &fpa11->fp_status);
  56         break;
  57
  58         case typeDouble:
  59           rFm = fpa11->fpreg[Fm].fDouble;
  60           break;
  61
  62         case typeExtended:
  63             // !! patb
  64             //printk("not implemented! why not?\n");
  65             //!! ScottB
  66             // should never get here, if extended involved
  67             // then other operand should be promoted then
  68             // ExtendedCPDO called.
  69             break;
  70
  71         default: return 0;
  72      }
  73    }
  74
  75    if (!MONADIC_INSTRUCTION(opcode))
  76    {
  77       Fn = getFn(opcode);
  78       switch (fpa11->fType[Fn])
  79       {
  80         case typeSingle:
  81           rFn = float32_to_float64(fpa11->fpreg[Fn].fSingle, &fpa11->fp_status);
  82         break;
  83
  84         case typeDouble:
  85           rFn = fpa11->fpreg[Fn].fDouble;
  86         break;
  87
  88         default: return 0;
  89       }
  90    }
  91
  92    Fd = getFd(opcode);
  93    /* !! this switch isn't optimized; better (opcode & MASK_ARITHMETIC_OPCODE)>>24, sort of */
  94    switch (opcode & MASK_ARITHMETIC_OPCODE)
  95    {
  96       /* dyadic opcodes */
  97       case ADF_CODE:
  98          fpa11->fpreg[Fd].fDouble = float64_add(rFn,rFm, &fpa11->fp_status);
  99       break;
 100
 101       case MUF_CODE:
 102       case FML_CODE:
 103          fpa11->fpreg[Fd].fDouble = float64_mul(rFn,rFm, &fpa11->fp_status);
 104       break;
 105
 106       case SUF_CODE:
 107          fpa11->fpreg[Fd].fDouble = float64_sub(rFn,rFm, &fpa11->fp_status);
 108       break;
 109
 110       case RSF_CODE:
 111          fpa11->fpreg[Fd].fDouble = float64_sub(rFm,rFn, &fpa11->fp_status);
 112       break;
 113
 114       case DVF_CODE:
 115       case FDV_CODE:
 116          fpa11->fpreg[Fd].fDouble = float64_div(rFn,rFm, &fpa11->fp_status);
 117       break;
 118
 119       case RDF_CODE:
 120       case FRD_CODE:
 121          fpa11->fpreg[Fd].fDouble = float64_div(rFm,rFn, &fpa11->fp_status);
 122       break;
 123
 124 #if 0
 125       case POW_CODE:
 126          fpa11->fpreg[Fd].fDouble = float64_pow(rFn,rFm);
 127       break;
 128
 129       case RPW_CODE:
 130          fpa11->fpreg[Fd].fDouble = float64_pow(rFm,rFn);
 131       break;
 132 #endif
 133
 134       case RMF_CODE:
 135          fpa11->fpreg[Fd].fDouble = float64_rem(rFn,rFm, &fpa11->fp_status);
 136       break;
 137
 138 #if 0
 139       case POL_CODE:
 140          fpa11->fpreg[Fd].fDouble = float64_pol(rFn,rFm);
 141       break;
 142 #endif
 143
 144       /* monadic opcodes */
 145       case MVF_CODE:
 146          fpa11->fpreg[Fd].fDouble = rFm;
 147       break;
 148
 149       case MNF_CODE:
 150       {
 151          unsigned int *p = (unsigned int*)&rFm;
 152 #ifdef HOST_WORDS_BIGENDIAN
 153          p[0] ^= 0x80000000;
 154 #else
 155          p[1] ^= 0x80000000;
 156 #endif
 157          fpa11->fpreg[Fd].fDouble = rFm;
 158       }
 159       break;
 160
 161       case ABS_CODE:
 162       {
 163          unsigned int *p = (unsigned int*)&rFm;
 164 #ifdef HOST_WORDS_BIGENDIAN
 165          p[0] &= 0x7fffffff;
 166 #else
 167          p[1] &= 0x7fffffff;
 168 #endif
 169          fpa11->fpreg[Fd].fDouble = rFm;
 170       }
 171       break;
 172
 173       case RND_CODE:
 174       case URD_CODE:
 175          fpa11->fpreg[Fd].fDouble = float64_round_to_int(rFm, &fpa11->fp_status);
 176       break;
 177
 178       case SQT_CODE:
 179          fpa11->fpreg[Fd].fDouble = float64_sqrt(rFm, &fpa11->fp_status);
 180       break;
 181
 182 #if 0
 183       case LOG_CODE:
 184          fpa11->fpreg[Fd].fDouble = float64_log(rFm);
 185       break;
 186
 187       case LGN_CODE:
 188          fpa11->fpreg[Fd].fDouble = float64_ln(rFm);
 189       break;
 190
 191       case EXP_CODE:
 192          fpa11->fpreg[Fd].fDouble = float64_exp(rFm);
 193       break;
 194
 195       case SIN_CODE:
 196          fpa11->fpreg[Fd].fDouble = float64_sin(rFm);
 197       break;
 198
 199       case COS_CODE:
 200          fpa11->fpreg[Fd].fDouble = float64_cos(rFm);
 201       break;
 202
 203       case TAN_CODE:
 204          fpa11->fpreg[Fd].fDouble = float64_tan(rFm);
 205       break;
 206
 207       case ASN_CODE:
 208          fpa11->fpreg[Fd].fDouble = float64_arcsin(rFm);
 209       break;
 210
 211       case ACS_CODE:
 212          fpa11->fpreg[Fd].fDouble = float64_arccos(rFm);
 213       break;
 214
 215       case ATN_CODE:
 216          fpa11->fpreg[Fd].fDouble = float64_arctan(rFm);
 217       break;
 218 #endif
 219
 220       case NRM_CODE:
 221       break;
 222
 223       default:
 224       {
 225         nRc = 0;
 226       }
 227    }
 228
 229    if (0 != nRc) fpa11->fType[Fd] = typeDouble;
 230    return nRc;
 231 }
 232
 233 #if 0
 234 float64 float64_exp(float64 rFm)
 235 {
 236   return rFm;
 237 //series
 238 }
 239
 240 float64 float64_ln(float64 rFm)
 241 {
 242   return rFm;
 243 //series
 244 }
 245
 246 float64 float64_sin(float64 rFm)
 247 {
 248   return rFm;
 249 //series
 250 }
 251
 252 float64 float64_cos(float64 rFm)
 253 {
 254    return rFm;
 255    //series
 256 }
 257
 258 #if 0
 259 float64 float64_arcsin(float64 rFm)
 260 {
 261 //series
 262 }
 263
 264 float64 float64_arctan(float64 rFm)
 265 {
 266   //series
 267 }
 268 #endif
 269
 270 float64 float64_log(float64 rFm)
 271 {
 272   return float64_div(float64_ln(rFm),getDoubleConstant(7));
 273 }
 274
 275 float64 float64_tan(float64 rFm)
 276 {
 277   return float64_div(float64_sin(rFm),float64_cos(rFm));
 278 }
 279
 280 float64 float64_arccos(float64 rFm)
 281 {
 282 return rFm;
 283    //return float64_sub(halfPi,float64_arcsin(rFm));
 284 }
 285
 286 float64 float64_pow(float64 rFn,float64 rFm)
 287 {
 288   return float64_exp(float64_mul(rFm,float64_ln(rFn)));
 289 }
 290
 291 float64 float64_pol(float64 rFn,float64 rFm)
 292 {
 293   return float64_arctan(float64_div(rFn,rFm));
 294 }
 295 #endif