include/math-emu/quad.h

   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
  55 union _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 */
 134 union _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__ */