i386/linux/linux-2.3.21/arch/arm/nwfpe/fpa11.h

   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 #ifndef __FPA11_H__
  23 #define __FPA11_H__
  24
  25 /* includes */
  26 #include "fpsr.h"               /* FP control and status register definitions */
  27 #include "softfloat.h"
  28
  29 #define         typeNone                0x00
  30 #define         typeSingle              0x01
  31 #define         typeDouble              0x02
  32 #define         typeExtended            0x03
  33
  34 typedef struct tagFPREG {
  35    unsigned int fType;
  36    union {
  37       float32  fSingle;
  38       float64  fDouble;
  39       floatx80 fExtended;
  40    } fValue;
  41 } FPREG;
  42
  43 /* FPA11 device model */
  44 typedef struct tagFPA11 {
  45   int initflag;                 /* this is special.  The kernel guarantees
  46                                    to set it to 0 when a thread is launched,
  47                                    so we can use it to detect whether this
  48                                    instance of the emulator needs to be
  49                                    initialised. */
  50   FPREG fpreg[8];               /* 8 floating point registers */
  51   FPSR fpsr;                    /* floating point status register */
  52   FPCR fpcr;                    /* floating point control register */
  53 } FPA11;
  54
  55 extern void resetFPA11(void);
  56 extern void SetRoundingMode(const unsigned int);
  57 extern void SetRoundingPrecision(const unsigned int);
  58
  59 extern FPA11 *fpa11;
  60
  61 #endif