i386/linux/linux-2.3.21/arch/arm/nwfpe/single_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 "config.h"
  23 #include "milieu.h"
  24 #include "softfloat.h"
  25 #include "fpopcode.h"
  26 #include "fpa11.h"
  27
  28 float32 getSingleConstant(unsigned int);
  29
  30 float32 float32_exp(float32 Fm);
  31 float32 float32_ln(float32 Fm);
  32 float32 float32_sin(float32 rFm);
  33 float32 float32_cos(float32 rFm);
  34 float32 float32_arcsin(float32 rFm);
  35 float32 float32_arctan(float32 rFm);
  36 float32 float32_log(float32 rFm);
  37 float32 float32_tan(float32 rFm);
  38 float32 float32_arccos(float32 rFm);
  39 float32 float32_pow(float32 rFn,float32 rFm);
  40 float32 float32_pol(float32 rFn,float32 rFm);
  41
  42 unsigned int SingleCPDO(const unsigned int opcode)
  43 {
  44    float32 rFm, rFn;
  45    unsigned int Fd, Fm, Fn, nRc = 1;
  46
  47    Fm = getFm(opcode);
  48    if (CONSTANT_FM(opcode))
  49    {
  50      rFm = getSingleConstant(Fm);
  51    }
  52    else
  53    {
  54      switch (fpa11->fpreg[Fm].fType)
  55      {
  56         case typeSingle:
  57           rFm = fpa11->fpreg[Fm].fValue.fSingle;
  58         break;
  59
  60         default: return 0;
  61      }
  62    }
  63
  64    if (!MONADIC_INSTRUCTION(opcode))
  65    {
  66       Fn = getFn(opcode);
  67       switch (fpa11->fpreg[Fn].fType)
  68       {
  69         case typeSingle:
  70           rFn = fpa11->fpreg[Fn].fValue.fSingle;
  71         break;
  72
  73         default: return 0;
  74       }
  75    }
  76
  77    Fd = getFd(opcode);
  78    switch (opcode & MASK_ARITHMETIC_OPCODE)
  79    {
  80       /* dyadic opcodes */
  81       case ADF_CODE:
  82          fpa11->fpreg[Fd].fValue.fSingle = float32_add(rFn,rFm);
  83       break;
  84
  85       case MUF_CODE:
  86       case FML_CODE:
  87         fpa11->fpreg[Fd].fValue.fSingle = float32_mul(rFn,rFm);
  88       break;
  89
  90       case SUF_CODE:
  91          fpa11->fpreg[Fd].fValue.fSingle = float32_sub(rFn,rFm);
  92       break;
  93
  94       case RSF_CODE:
  95          fpa11->fpreg[Fd].fValue.fSingle = float32_sub(rFm,rFn);
  96       break;
  97
  98       case DVF_CODE:
  99       case FDV_CODE:
 100          fpa11->fpreg[Fd].fValue.fSingle = float32_div(rFn,rFm);
 101       break;
 102
 103       case RDF_CODE:
 104       case FRD_CODE:
 105          fpa11->fpreg[Fd].fValue.fSingle = float32_div(rFm,rFn);
 106       break;
 107
 108 #if 0
 109       case POW_CODE:
 110          fpa11->fpreg[Fd].fValue.fSingle = float32_pow(rFn,rFm);
 111       break;
 112
 113       case RPW_CODE:
 114          fpa11->fpreg[Fd].fValue.fSingle = float32_pow(rFm,rFn);
 115       break;
 116 #endif
 117
 118       case RMF_CODE:
 119          fpa11->fpreg[Fd].fValue.fSingle = float32_rem(rFn,rFm);
 120       break;
 121
 122 #if 0
 123       case POL_CODE:
 124          fpa11->fpreg[Fd].fValue.fSingle = float32_pol(rFn,rFm);
 125       break;
 126 #endif
 127
 128       /* monadic opcodes */
 129       case MVF_CODE:
 130          fpa11->fpreg[Fd].fValue.fSingle = rFm;
 131       break;
 132
 133       case MNF_CODE:
 134          rFm ^= 0x80000000;
 135          fpa11->fpreg[Fd].fValue.fSingle = rFm;
 136       break;
 137
 138       case ABS_CODE:
 139          rFm &= 0x7fffffff;
 140          fpa11->fpreg[Fd].fValue.fSingle = rFm;
 141       break;
 142
 143       case RND_CODE:
 144       case URD_CODE:
 145          fpa11->fpreg[Fd].fValue.fSingle =
 146              int32_to_float32(float32_to_int32(rFm));
 147       break;
 148
 149       case SQT_CODE:
 150          fpa11->fpreg[Fd].fValue.fSingle = float32_sqrt(rFm);
 151       break;
 152
 153 #if 0
 154       case LOG_CODE:
 155          fpa11->fpreg[Fd].fValue.fSingle = float32_log(rFm);
 156       break;
 157
 158       case LGN_CODE:
 159          fpa11->fpreg[Fd].fValue.fSingle = float32_ln(rFm);
 160       break;
 161
 162       case EXP_CODE:
 163          fpa11->fpreg[Fd].fValue.fSingle = float32_exp(rFm);
 164       break;
 165
 166       case SIN_CODE:
 167          fpa11->fpreg[Fd].fValue.fSingle = float32_sin(rFm);
 168       break;
 169
 170       case COS_CODE:
 171          fpa11->fpreg[Fd].fValue.fSingle = float32_cos(rFm);
 172       break;
 173
 174       case TAN_CODE:
 175          fpa11->fpreg[Fd].fValue.fSingle = float32_tan(rFm);
 176       break;
 177
 178       case ASN_CODE:
 179          fpa11->fpreg[Fd].fValue.fSingle = float32_arcsin(rFm);
 180       break;
 181
 182       case ACS_CODE:
 183          fpa11->fpreg[Fd].fValue.fSingle = float32_arccos(rFm);
 184       break;
 185
 186       case ATN_CODE:
 187          fpa11->fpreg[Fd].fValue.fSingle = float32_arctan(rFm);
 188       break;
 189 #endif
 190
 191       case NRM_CODE:
 192       break;
 193
 194       default:
 195       {
 196         nRc = 0;
 197       }
 198    }
 199
 200    if (0 != nRc) fpa11->fpreg[Fd].fType = typeSingle;
 201    return nRc;
 202 }
 203
 204 #if 0
 205 float32 float32_exp(float32 Fm)
 206 {
 207 //series
 208 }
 209
 210 float32 float32_ln(float32 Fm)
 211 {
 212 //series
 213 }
 214
 215 float32 float32_sin(float32 rFm)
 216 {
 217 //series
 218 }
 219
 220 float32 float32_cos(float32 rFm)
 221 {
 222 //series
 223 }
 224
 225 float32 float32_arcsin(float32 rFm)
 226 {
 227 //series
 228 }
 229
 230 float32 float32_arctan(float32 rFm)
 231 {
 232   //series
 233 }
 234
 235 float32 float32_arccos(float32 rFm)
 236 {
 237    //return float32_sub(halfPi,float32_arcsin(rFm));
 238 }
 239
 240 float32 float32_log(float32 rFm)
 241 {
 242   return float32_div(float32_ln(rFm),getSingleConstant(7));
 243 }
 244
 245 float32 float32_tan(float32 rFm)
 246 {
 247   return float32_div(float32_sin(rFm),float32_cos(rFm));
 248 }
 249
 250 float32 float32_pow(float32 rFn,float32 rFm)
 251 {
 252   return float32_exp(float32_mul(rFm,float32_ln(rFn)));
 253 }
 254
 255 float32 float32_pol(float32 rFn,float32 rFm)
 256 {
 257   return float32_arctan(float32_div(rFn,rFm));
 258 }
 259 #endif