LXR qemu/linux-user/arm/nwfpe/fpopcode.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 "qemu/osdep.h"
  22#include "fpa11.h"
  23#include "fpu/softfloat.h"
  24#include "fpopcode.h"
  25#include "fpsr.h"
  26//#include "fpmodule.h"
  27//#include "fpmodule.inl"
  28
  29const floatx80 floatx80Constant[] = {
  30  { 0x0000000000000000ULL, 0x0000},     /* extended 0.0 */
  31  { 0x8000000000000000ULL, 0x3fff},     /* extended 1.0 */
  32  { 0x8000000000000000ULL, 0x4000},     /* extended 2.0 */
  33  { 0xc000000000000000ULL, 0x4000},     /* extended 3.0 */
  34  { 0x8000000000000000ULL, 0x4001},     /* extended 4.0 */
  35  { 0xa000000000000000ULL, 0x4001},     /* extended 5.0 */
  36  { 0x8000000000000000ULL, 0x3ffe},     /* extended 0.5 */
  37  { 0xa000000000000000ULL, 0x4002}      /* extended 10.0 */
  38};
  39
  40const float64 float64Constant[] = {
  41  const_float64(0x0000000000000000ULL),         /* double 0.0 */
  42  const_float64(0x3ff0000000000000ULL),         /* double 1.0 */
  43  const_float64(0x4000000000000000ULL),         /* double 2.0 */
  44  const_float64(0x4008000000000000ULL),         /* double 3.0 */
  45  const_float64(0x4010000000000000ULL),         /* double 4.0 */
  46  const_float64(0x4014000000000000ULL),         /* double 5.0 */
  47  const_float64(0x3fe0000000000000ULL),         /* double 0.5 */
  48  const_float64(0x4024000000000000ULL)                  /* double 10.0 */
  49};
  50
  51const float32 float32Constant[] = {
  52  const_float32(0x00000000),                            /* single 0.0 */
  53  const_float32(0x3f800000),                            /* single 1.0 */
  54  const_float32(0x40000000),                            /* single 2.0 */
  55  const_float32(0x40400000),                            /* single 3.0 */
  56  const_float32(0x40800000),                            /* single 4.0 */
  57  const_float32(0x40a00000),                            /* single 5.0 */
  58  const_float32(0x3f000000),                            /* single 0.5 */
  59  const_float32(0x41200000)                             /* single 10.0 */
  60};
  61
  62unsigned int getRegisterCount(const unsigned int opcode)
  63{
  64  unsigned int nRc;
  65
  66  switch (opcode & MASK_REGISTER_COUNT)
  67  {
  68    case 0x00000000: nRc = 4; break;
  69    case 0x00008000: nRc = 1; break;
  70    case 0x00400000: nRc = 2; break;
  71    case 0x00408000: nRc = 3; break;
  72    default: nRc = 0;
  73  }
  74
  75  return(nRc);
  76}
  77
  78unsigned int getDestinationSize(const unsigned int opcode)
  79{
  80  unsigned int nRc;
  81
  82  switch (opcode & MASK_DESTINATION_SIZE)
  83  {
  84    case 0x00000000: nRc = typeSingle; break;
  85    case 0x00000080: nRc = typeDouble; break;
  86    case 0x00080000: nRc = typeExtended; break;
  87    default: nRc = typeNone;
  88  }
  89
  90  return(nRc);
  91}
  92