Archipelago » qemu

/*

    NetWinder Floating Point Emulator

    (c) Rebel.COM, 1998,1999

    Direct questions, comments to Scott Bambrough <scottb@netwinder.org>

    This program is free software; you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by

    the Free Software Foundation; either version 2 of the License, or

    (at your option) any later version.

    This program is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License

    along with this program; if not, write to the Free Software

    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include "fpa11.h"

#include "softfloat.h"

#include "fpopcode.h"

float32 float32_exp(float32 Fm);

float32 float32_ln(float32 Fm);

float32 float32_sin(float32 rFm);

float32 float32_cos(float32 rFm);

float32 float32_arcsin(float32 rFm);

float32 float32_arctan(float32 rFm);

float32 float32_log(float32 rFm);

float32 float32_tan(float32 rFm);

float32 float32_arccos(float32 rFm);

float32 float32_pow(float32 rFn,float32 rFm);

float32 float32_pol(float32 rFn,float32 rFm);

unsigned int SingleCPDO(const unsigned int opcode)

{

   FPA11 *fpa11 = GET_FPA11();

   float32 rFm, rFn = 0;

   unsigned int Fd, Fm, Fn, nRc = 1;

   Fm = getFm(opcode);

   if (CONSTANT_FM(opcode))

   {

     rFm = getSingleConstant(Fm);

   }

   else

   {  

     switch (fpa11->fType[Fm])

     {

        case typeSingle:

          rFm = fpa11->fpreg[Fm].fSingle;

        break;

        default: return 0;

     }

   }

   if (!MONADIC_INSTRUCTION(opcode))

   {

      Fn = getFn(opcode);

      switch (fpa11->fType[Fn])

      {

        case typeSingle:

          rFn = fpa11->fpreg[Fn].fSingle;

        break;

        default: return 0;

      }

   }

   Fd = getFd(opcode);

   switch (opcode & MASK_ARITHMETIC_OPCODE)

   {

      /* dyadic opcodes */

      case ADF_CODE:

         fpa11->fpreg[Fd].fSingle = float32_add(rFn,rFm);

      break;

      case MUF_CODE:

      case FML_CODE:

        fpa11->fpreg[Fd].fSingle = float32_mul(rFn,rFm);

      break;

      case SUF_CODE:

         fpa11->fpreg[Fd].fSingle = float32_sub(rFn,rFm);

      break;

      case RSF_CODE:

         fpa11->fpreg[Fd].fSingle = float32_sub(rFm,rFn);

      break;

      case DVF_CODE:

      case FDV_CODE:

         fpa11->fpreg[Fd].fSingle = float32_div(rFn,rFm);

      break;

      case RDF_CODE:

      case FRD_CODE:

         fpa11->fpreg[Fd].fSingle = float32_div(rFm,rFn);

      break;

#if 0

      case POW_CODE:

         fpa11->fpreg[Fd].fSingle = float32_pow(rFn,rFm);

      break;

      case RPW_CODE:

         fpa11->fpreg[Fd].fSingle = float32_pow(rFm,rFn);

      break;

#endif

      case RMF_CODE:

         fpa11->fpreg[Fd].fSingle = float32_rem(rFn,rFm);

      break;

#if 0

      case POL_CODE:

         fpa11->fpreg[Fd].fSingle = float32_pol(rFn,rFm);

      break;

#endif

      /* monadic opcodes */

      case MVF_CODE:

         fpa11->fpreg[Fd].fSingle = rFm;

      break;

      case MNF_CODE:

         rFm ^= 0x80000000;

         fpa11->fpreg[Fd].fSingle = rFm;

      break;

      case ABS_CODE:

         rFm &= 0x7fffffff;

         fpa11->fpreg[Fd].fSingle = rFm;

      break;

      case RND_CODE:

      case URD_CODE:

         fpa11->fpreg[Fd].fSingle = float32_round_to_int(rFm);

      break;

      case SQT_CODE:

         fpa11->fpreg[Fd].fSingle = float32_sqrt(rFm);

      break;

#if 0

      case LOG_CODE:

         fpa11->fpreg[Fd].fSingle = float32_log(rFm);

      break;

      case LGN_CODE:

         fpa11->fpreg[Fd].fSingle = float32_ln(rFm);

      break;

      case EXP_CODE:

         fpa11->fpreg[Fd].fSingle = float32_exp(rFm);

      break;

      case SIN_CODE:

         fpa11->fpreg[Fd].fSingle = float32_sin(rFm);

      break;

      case COS_CODE:

         fpa11->fpreg[Fd].fSingle = float32_cos(rFm);

      break;

      case TAN_CODE:

         fpa11->fpreg[Fd].fSingle = float32_tan(rFm);

      break;

      case ASN_CODE:

         fpa11->fpreg[Fd].fSingle = float32_arcsin(rFm);

      break;

      case ACS_CODE:

         fpa11->fpreg[Fd].fSingle = float32_arccos(rFm);

      break;

      case ATN_CODE:

         fpa11->fpreg[Fd].fSingle = float32_arctan(rFm);

      break;

#endif

      case NRM_CODE:

      break;

      default:

      {

        nRc = 0;

      }

   }

   if (0 != nRc) fpa11->fType[Fd] = typeSingle;

   return nRc;

}

#if 0

float32 float32_exp(float32 Fm)

{

//series

}

float32 float32_ln(float32 Fm)

{

//series

}

float32 float32_sin(float32 rFm)

{

//series

}

float32 float32_cos(float32 rFm)

{

//series

}

float32 float32_arcsin(float32 rFm)

{

//series

}

float32 float32_arctan(float32 rFm)

{

  //series

}

float32 float32_arccos(float32 rFm)

{

   //return float32_sub(halfPi,float32_arcsin(rFm));

}

float32 float32_log(float32 rFm)

{

  return float32_div(float32_ln(rFm),getSingleConstant(7));

}

float32 float32_tan(float32 rFm)

{

  return float32_div(float32_sin(rFm),float32_cos(rFm));

}

float32 float32_pow(float32 rFn,float32 rFm)

{

  return float32_exp(float32_mul(rFm,float32_ln(rFn))); 

}

float32 float32_pol(float32 rFn,float32 rFm)

{

  return float32_arctan(float32_div(rFn,rFm)); 

}

#endif