linux/include/math-emu/quad.h
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   1/* Software floating-point emulation.
   2   Definitions for IEEE Quad Precision.
   3   Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.
   4   This file is part of the GNU C Library.
   5   Contributed by Richard Henderson (rth@cygnus.com),
   6                  Jakub Jelinek (jj@ultra.linux.cz),
   7                  David S. Miller (davem@redhat.com) and
   8                  Peter Maydell (pmaydell@chiark.greenend.org.uk).
   9
  10   The GNU C Library is free software; you can redistribute it and/or
  11   modify it under the terms of the GNU Library General Public License as
  12   published by the Free Software Foundation; either version 2 of the
  13   License, or (at your option) any later version.
  14
  15   The GNU C Library is distributed in the hope that it will be useful,
  16   but WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18   Library General Public License for more details.
  19
  20   You should have received a copy of the GNU Library General Public
  21   License along with the GNU C Library; see the file COPYING.LIB.  If
  22   not, write to the Free Software Foundation, Inc.,
  23   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  24
  25#ifndef  __MATH_EMU_QUAD_H__
  26#define  __MATH_EMU_QUAD_H__
  27
  28#if _FP_W_TYPE_SIZE < 32
  29#error "Here's a nickel, kid. Go buy yourself a real computer."
  30#endif
  31
  32#if _FP_W_TYPE_SIZE < 64
  33#define _FP_FRACTBITS_Q         (4*_FP_W_TYPE_SIZE)
  34#else
  35#define _FP_FRACTBITS_Q         (2*_FP_W_TYPE_SIZE)
  36#endif
  37
  38#define _FP_FRACBITS_Q          113
  39#define _FP_FRACXBITS_Q         (_FP_FRACTBITS_Q - _FP_FRACBITS_Q)
  40#define _FP_WFRACBITS_Q         (_FP_WORKBITS + _FP_FRACBITS_Q)
  41#define _FP_WFRACXBITS_Q        (_FP_FRACTBITS_Q - _FP_WFRACBITS_Q)
  42#define _FP_EXPBITS_Q           15
  43#define _FP_EXPBIAS_Q           16383
  44#define _FP_EXPMAX_Q            32767
  45
  46#define _FP_QNANBIT_Q           \
  47        ((_FP_W_TYPE)1 << (_FP_FRACBITS_Q-2) % _FP_W_TYPE_SIZE)
  48#define _FP_IMPLBIT_Q           \
  49        ((_FP_W_TYPE)1 << (_FP_FRACBITS_Q-1) % _FP_W_TYPE_SIZE)
  50#define _FP_OVERFLOW_Q          \
  51        ((_FP_W_TYPE)1 << (_FP_WFRACBITS_Q % _FP_W_TYPE_SIZE))
  52
  53#if _FP_W_TYPE_SIZE < 64
  54
  55union _FP_UNION_Q
  56{
  57   long double flt;
  58   struct 
  59   {
  60#if __BYTE_ORDER == __BIG_ENDIAN
  61      unsigned sign : 1;
  62      unsigned exp : _FP_EXPBITS_Q;
  63      unsigned long frac3 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0)-(_FP_W_TYPE_SIZE * 3);
  64      unsigned long frac2 : _FP_W_TYPE_SIZE;
  65      unsigned long frac1 : _FP_W_TYPE_SIZE;
  66      unsigned long frac0 : _FP_W_TYPE_SIZE;
  67#else
  68      unsigned long frac0 : _FP_W_TYPE_SIZE;
  69      unsigned long frac1 : _FP_W_TYPE_SIZE;
  70      unsigned long frac2 : _FP_W_TYPE_SIZE;
  71      unsigned long frac3 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0)-(_FP_W_TYPE_SIZE * 3);
  72      unsigned exp : _FP_EXPBITS_Q;
  73      unsigned sign : 1;
  74#endif /* not bigendian */
  75   } bits __attribute__((packed));
  76};
  77
  78
  79#define FP_DECL_Q(X)            _FP_DECL(4,X)
  80#define FP_UNPACK_RAW_Q(X,val)  _FP_UNPACK_RAW_4(Q,X,val)
  81#define FP_UNPACK_RAW_QP(X,val) _FP_UNPACK_RAW_4_P(Q,X,val)
  82#define FP_PACK_RAW_Q(val,X)    _FP_PACK_RAW_4(Q,val,X)
  83#define FP_PACK_RAW_QP(val,X)           \
  84  do {                                  \
  85    if (!FP_INHIBIT_RESULTS)            \
  86      _FP_PACK_RAW_4_P(Q,val,X);        \
  87  } while (0)
  88
  89#define FP_UNPACK_Q(X,val)              \
  90  do {                                  \
  91    _FP_UNPACK_RAW_4(Q,X,val);          \
  92    _FP_UNPACK_CANONICAL(Q,4,X);        \
  93  } while (0)
  94
  95#define FP_UNPACK_QP(X,val)             \
  96  do {                                  \
  97    _FP_UNPACK_RAW_4_P(Q,X,val);        \
  98    _FP_UNPACK_CANONICAL(Q,4,X);        \
  99  } while (0)
 100
 101#define FP_PACK_Q(val,X)                \
 102  do {                                  \
 103    _FP_PACK_CANONICAL(Q,4,X);          \
 104    _FP_PACK_RAW_4(Q,val,X);            \
 105  } while (0)
 106
 107#define FP_PACK_QP(val,X)               \
 108  do {                                  \
 109    _FP_PACK_CANONICAL(Q,4,X);          \
 110    if (!FP_INHIBIT_RESULTS)            \
 111      _FP_PACK_RAW_4_P(Q,val,X);        \
 112  } while (0)
 113
 114#define FP_ISSIGNAN_Q(X)                _FP_ISSIGNAN(Q,4,X)
 115#define FP_NEG_Q(R,X)                   _FP_NEG(Q,4,R,X)
 116#define FP_ADD_Q(R,X,Y)                 _FP_ADD(Q,4,R,X,Y)
 117#define FP_SUB_Q(R,X,Y)                 _FP_SUB(Q,4,R,X,Y)
 118#define FP_MUL_Q(R,X,Y)                 _FP_MUL(Q,4,R,X,Y)
 119#define FP_DIV_Q(R,X,Y)                 _FP_DIV(Q,4,R,X,Y)
 120#define FP_SQRT_Q(R,X)                  _FP_SQRT(Q,4,R,X)
 121#define _FP_SQRT_MEAT_Q(R,S,T,X,Q)      _FP_SQRT_MEAT_4(R,S,T,X,Q)
 122
 123#define FP_CMP_Q(r,X,Y,un)      _FP_CMP(Q,4,r,X,Y,un)
 124#define FP_CMP_EQ_Q(r,X,Y)      _FP_CMP_EQ(Q,4,r,X,Y)
 125
 126#define FP_TO_INT_Q(r,X,rsz,rsg)        _FP_TO_INT(Q,4,r,X,rsz,rsg)
 127#define FP_TO_INT_ROUND_Q(r,X,rsz,rsg)  _FP_TO_INT_ROUND(Q,4,r,X,rsz,rsg)
 128#define FP_FROM_INT_Q(X,r,rs,rt)        _FP_FROM_INT(Q,4,X,r,rs,rt)
 129
 130#define _FP_FRAC_HIGH_Q(X)      _FP_FRAC_HIGH_4(X)
 131#define _FP_FRAC_HIGH_RAW_Q(X)  _FP_FRAC_HIGH_4(X)
 132
 133#else   /* not _FP_W_TYPE_SIZE < 64 */
 134union _FP_UNION_Q
 135{
 136  long double flt /* __attribute__((mode(TF))) */ ;
 137  struct {
 138#if __BYTE_ORDER == __BIG_ENDIAN
 139    unsigned sign  : 1;
 140    unsigned exp   : _FP_EXPBITS_Q;
 141    unsigned long frac1 : _FP_FRACBITS_Q-(_FP_IMPLBIT_Q != 0)-_FP_W_TYPE_SIZE;
 142    unsigned long frac0 : _FP_W_TYPE_SIZE;
 143#else
 144    unsigned long frac0 : _FP_W_TYPE_SIZE;
 145    unsigned long frac1 : _FP_FRACBITS_Q-(_FP_IMPLBIT_Q != 0)-_FP_W_TYPE_SIZE;
 146    unsigned exp   : _FP_EXPBITS_Q;
 147    unsigned sign  : 1;
 148#endif
 149  } bits;
 150};
 151
 152#define FP_DECL_Q(X)            _FP_DECL(2,X)
 153#define FP_UNPACK_RAW_Q(X,val)  _FP_UNPACK_RAW_2(Q,X,val)
 154#define FP_UNPACK_RAW_QP(X,val) _FP_UNPACK_RAW_2_P(Q,X,val)
 155#define FP_PACK_RAW_Q(val,X)    _FP_PACK_RAW_2(Q,val,X)
 156#define FP_PACK_RAW_QP(val,X)           \
 157  do {                                  \
 158    if (!FP_INHIBIT_RESULTS)            \
 159      _FP_PACK_RAW_2_P(Q,val,X);        \
 160  } while (0)
 161
 162#define FP_UNPACK_Q(X,val)              \
 163  do {                                  \
 164    _FP_UNPACK_RAW_2(Q,X,val);          \
 165    _FP_UNPACK_CANONICAL(Q,2,X);        \
 166  } while (0)
 167
 168#define FP_UNPACK_QP(X,val)             \
 169  do {                                  \
 170    _FP_UNPACK_RAW_2_P(Q,X,val);        \
 171    _FP_UNPACK_CANONICAL(Q,2,X);        \
 172  } while (0)
 173
 174#define FP_PACK_Q(val,X)                \
 175  do {                                  \
 176    _FP_PACK_CANONICAL(Q,2,X);          \
 177    _FP_PACK_RAW_2(Q,val,X);            \
 178  } while (0)
 179
 180#define FP_PACK_QP(val,X)               \
 181  do {                                  \
 182    _FP_PACK_CANONICAL(Q,2,X);          \
 183    if (!FP_INHIBIT_RESULTS)            \
 184      _FP_PACK_RAW_2_P(Q,val,X);        \
 185  } while (0)
 186
 187#define FP_ISSIGNAN_Q(X)                _FP_ISSIGNAN(Q,2,X)
 188#define FP_NEG_Q(R,X)                   _FP_NEG(Q,2,R,X)
 189#define FP_ADD_Q(R,X,Y)                 _FP_ADD(Q,2,R,X,Y)
 190#define FP_SUB_Q(R,X,Y)                 _FP_SUB(Q,2,R,X,Y)
 191#define FP_MUL_Q(R,X,Y)                 _FP_MUL(Q,2,R,X,Y)
 192#define FP_DIV_Q(R,X,Y)                 _FP_DIV(Q,2,R,X,Y)
 193#define FP_SQRT_Q(R,X)                  _FP_SQRT(Q,2,R,X)
 194#define _FP_SQRT_MEAT_Q(R,S,T,X,Q)      _FP_SQRT_MEAT_2(R,S,T,X,Q)
 195
 196#define FP_CMP_Q(r,X,Y,un)      _FP_CMP(Q,2,r,X,Y,un)
 197#define FP_CMP_EQ_Q(r,X,Y)      _FP_CMP_EQ(Q,2,r,X,Y)
 198
 199#define FP_TO_INT_Q(r,X,rsz,rsg)        _FP_TO_INT(Q,2,r,X,rsz,rsg)
 200#define FP_TO_INT_ROUND_Q(r,X,rsz,rsg)  _FP_TO_INT_ROUND(Q,2,r,X,rsz,rsg)
 201#define FP_FROM_INT_Q(X,r,rs,rt)        _FP_FROM_INT(Q,2,X,r,rs,rt)
 202
 203#define _FP_FRAC_HIGH_Q(X)      _FP_FRAC_HIGH_2(X)
 204#define _FP_FRAC_HIGH_RAW_Q(X)  _FP_FRAC_HIGH_2(X)
 205
 206#endif /* not _FP_W_TYPE_SIZE < 64 */
 207
 208#endif /* __MATH_EMU_QUAD_H__ */
 209
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