/*    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"float64 float64_exp(float64 Fm);float64 float64_ln(float64 Fm);float64 float64_sin(float64 rFm);float64 float64_cos(float64 rFm);float64 float64_arcsin(float64 rFm);float64 float64_arctan(float64 rFm);float64 float64_log(float64 rFm);float64 float64_tan(float64 rFm);float64 float64_arccos(float64 rFm);float64 float64_pow(float64 rFn,float64 rFm);float64 float64_pol(float64 rFn,float64 rFm);unsigned int DoubleCPDO(const unsigned int opcode){   FPA11 *fpa11 = GET_FPA11();   float64 rFm, rFn = 0;   unsigned int Fd, Fm, Fn, nRc = 1;   //printk("DoubleCPDO(0x%08x)\n",opcode);      Fm = getFm(opcode);   if (CONSTANT_FM(opcode))   {     rFm = getDoubleConstant(Fm);   }   else   {       switch (fpa11->fType[Fm])     {        case typeSingle:          rFm = float32_to_float64(fpa11->fpreg[Fm].fSingle, &fpa11->fp_status);        break;        case typeDouble:          rFm = fpa11->fpreg[Fm].fDouble;          break;        case typeExtended:            // !! patb	    //printk("not implemented! why not?\n");            //!! ScottB            // should never get here, if extended involved            // then other operand should be promoted then            // ExtendedCPDO called.            break;        default: return 0;     }   }   if (!MONADIC_INSTRUCTION(opcode))   {      Fn = getFn(opcode);      switch (fpa11->fType[Fn])      {        case typeSingle:          rFn = float32_to_float64(fpa11->fpreg[Fn].fSingle, &fpa11->fp_status);        break;        case typeDouble:          rFn = fpa11->fpreg[Fn].fDouble;        break;                default: return 0;      }   }   Fd = getFd(opcode);   /* !! this switch isn't optimized; better (opcode & MASK_ARITHMETIC_OPCODE)>>24, sort of */   switch (opcode & MASK_ARITHMETIC_OPCODE)   {      /* dyadic opcodes */      case ADF_CODE:         fpa11->fpreg[Fd].fDouble = float64_add(rFn,rFm, &fpa11->fp_status);      break;      case MUF_CODE:      case FML_CODE:         fpa11->fpreg[Fd].fDouble = float64_mul(rFn,rFm, &fpa11->fp_status);      break;      case SUF_CODE:         fpa11->fpreg[Fd].fDouble = float64_sub(rFn,rFm, &fpa11->fp_status);      break;      case RSF_CODE:         fpa11->fpreg[Fd].fDouble = float64_sub(rFm,rFn, &fpa11->fp_status);      break;      case DVF_CODE:      case FDV_CODE:         fpa11->fpreg[Fd].fDouble = float64_div(rFn,rFm, &fpa11->fp_status);      break;      case RDF_CODE:      case FRD_CODE:         fpa11->fpreg[Fd].fDouble = float64_div(rFm,rFn, &fpa11->fp_status);      break;#if 0      case POW_CODE:         fpa11->fpreg[Fd].fDouble = float64_pow(rFn,rFm);      break;      case RPW_CODE:         fpa11->fpreg[Fd].fDouble = float64_pow(rFm,rFn);      break;#endif      case RMF_CODE:         fpa11->fpreg[Fd].fDouble = float64_rem(rFn,rFm, &fpa11->fp_status);      break;#if 0      case POL_CODE:         fpa11->fpreg[Fd].fDouble = float64_pol(rFn,rFm);      break;#endif      /* monadic opcodes */      case MVF_CODE:         fpa11->fpreg[Fd].fDouble = rFm;      break;      case MNF_CODE:      {         unsigned int *p = (unsigned int*)&rFm;#ifdef WORDS_BIGENDIAN         p[0] ^= 0x80000000;#else         p[1] ^= 0x80000000;#endif         fpa11->fpreg[Fd].fDouble = rFm;      }      break;      case ABS_CODE:      {         unsigned int *p = (unsigned int*)&rFm;#ifdef WORDS_BIGENDIAN         p[0] &= 0x7fffffff;#else         p[1] &= 0x7fffffff;#endif         fpa11->fpreg[Fd].fDouble = rFm;      }      break;      case RND_CODE:      case URD_CODE:         fpa11->fpreg[Fd].fDouble = float64_round_to_int(rFm, &fpa11->fp_status);      break;      case SQT_CODE:         fpa11->fpreg[Fd].fDouble = float64_sqrt(rFm, &fpa11->fp_status);      break;#if 0      case LOG_CODE:         fpa11->fpreg[Fd].fDouble = float64_log(rFm);      break;      case LGN_CODE:         fpa11->fpreg[Fd].fDouble = float64_ln(rFm);      break;      case EXP_CODE:         fpa11->fpreg[Fd].fDouble = float64_exp(rFm);      break;      case SIN_CODE:         fpa11->fpreg[Fd].fDouble = float64_sin(rFm);      break;      case COS_CODE:         fpa11->fpreg[Fd].fDouble = float64_cos(rFm);      break;      case TAN_CODE:         fpa11->fpreg[Fd].fDouble = float64_tan(rFm);      break;      case ASN_CODE:         fpa11->fpreg[Fd].fDouble = float64_arcsin(rFm);      break;      case ACS_CODE:         fpa11->fpreg[Fd].fDouble = float64_arccos(rFm);      break;      case ATN_CODE:         fpa11->fpreg[Fd].fDouble = float64_arctan(rFm);      break;#endif      case NRM_CODE:      break;            default:      {        nRc = 0;      }   }   if (0 != nRc) fpa11->fType[Fd] = typeDouble;   return nRc;}#if 0float64 float64_exp(float64 rFm){  return rFm;//series}float64 float64_ln(float64 rFm){  return rFm;//series}float64 float64_sin(float64 rFm){  return rFm;//series}float64 float64_cos(float64 rFm){   return rFm;   //series}#if 0float64 float64_arcsin(float64 rFm){//series}float64 float64_arctan(float64 rFm){  //series}#endiffloat64 float64_log(float64 rFm){  return float64_div(float64_ln(rFm),getDoubleConstant(7));}float64 float64_tan(float64 rFm){  return float64_div(float64_sin(rFm),float64_cos(rFm));}float64 float64_arccos(float64 rFm){return rFm;   //return float64_sub(halfPi,float64_arcsin(rFm));}float64 float64_pow(float64 rFn,float64 rFm){  return float64_exp(float64_mul(rFm,float64_ln(rFn))); }float64 float64_pol(float64 rFn,float64 rFm){  return float64_arctan(float64_div(rFn,rFm)); }#endif