linux-imx

/* Software floating-point emulation.

   Definitions for IEEE Double Precision

   Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Richard Henderson (rth@cygnus.com),

          Jakub Jelinek (jj@ultra.linux.cz),

          David S. Miller (davem@redhat.com) and

          Peter Maydell (pmaydell@chiark.greenend.org.uk).

​

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Library General Public License as

   published by the Free Software Foundation; either version 2 of the

   License, or (at your option) any later version.

​

   The GNU C Library 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

   Library General Public License for more details.

​

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

   License along with the GNU C Library; see the file COPYING.LIB.  If

   not, write to the Free Software Foundation, Inc.,

   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

​

#ifndef    __MATH_EMU_DOUBLE_H__

#define    __MATH_EMU_DOUBLE_H__

​

#if _FP_W_TYPE_SIZE < 32

#error "Here's a nickel kid.  Go buy yourself a real computer."

#endif

​

#if _FP_W_TYPE_SIZE < 64

#define _FP_FRACTBITS_D     (2 * _FP_W_TYPE_SIZE)

#else

#define _FP_FRACTBITS_D     _FP_W_TYPE_SIZE

#endif

​

#define _FP_FRACBITS_D      53

#define _FP_FRACXBITS_D     (_FP_FRACTBITS_D - _FP_FRACBITS_D)

#define _FP_WFRACBITS_D     (_FP_WORKBITS + _FP_FRACBITS_D)

#define _FP_WFRACXBITS_D    (_FP_FRACTBITS_D - _FP_WFRACBITS_D)

#define _FP_EXPBITS_D       11

#define _FP_EXPBIAS_D       1023

#define _FP_EXPMAX_D        2047

​

#define _FP_QNANBIT_D       \

    ((_FP_W_TYPE)1 << (_FP_FRACBITS_D-2) % _FP_W_TYPE_SIZE)

#define _FP_IMPLBIT_D       \

    ((_FP_W_TYPE)1 << (_FP_FRACBITS_D-1) % _FP_W_TYPE_SIZE)

#define _FP_OVERFLOW_D      \

    ((_FP_W_TYPE)1 << _FP_WFRACBITS_D % _FP_W_TYPE_SIZE)

​

#if _FP_W_TYPE_SIZE < 64

​

union _FP_UNION_D

{

  double flt;

  struct {

#if __BYTE_ORDER == __BIG_ENDIAN

    unsigned sign  : 1;

    unsigned exp   : _FP_EXPBITS_D;

    unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;

    unsigned frac0 : _FP_W_TYPE_SIZE;

#else

    unsigned frac0 : _FP_W_TYPE_SIZE;

    unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;

    unsigned exp   : _FP_EXPBITS_D;

    unsigned sign  : 1;

#endif

  } bits __attribute__((packed));

};

​

#define FP_DECL_D(X)        _FP_DECL(2,X)

#define FP_UNPACK_RAW_D(X,val)  _FP_UNPACK_RAW_2(D,X,val)

#define FP_UNPACK_RAW_DP(X,val) _FP_UNPACK_RAW_2_P(D,X,val)

#define FP_PACK_RAW_D(val,X)    _FP_PACK_RAW_2(D,val,X)

#define FP_PACK_RAW_DP(val,X)       \

  do {                  \

    if (!FP_INHIBIT_RESULTS)        \

      _FP_PACK_RAW_2_P(D,val,X);    \

  } while (0)

​

#define FP_UNPACK_D(X,val)      \

  do {                  \

    _FP_UNPACK_RAW_2(D,X,val);      \

    _FP_UNPACK_CANONICAL(D,2,X);    \

  } while (0)

​

#define FP_UNPACK_DP(X,val)     \

  do {                  \

    _FP_UNPACK_RAW_2_P(D,X,val);    \

    _FP_UNPACK_CANONICAL(D,2,X);    \