soft-fp/quad.h

   1 /* Software floating-point emulation.
   2    Definitions for IEEE Quad Precision.
   3    Copyright (C) 1997,1998,1999,2006,2007 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 Lesser General Public
  12    License as published by the Free Software Foundation; either
  13    version 2.1 of the License, or (at your option) any later version.
  14
  15    In addition to the permissions in the GNU Lesser General Public
  16    License, the Free Software Foundation gives you unlimited
  17    permission to link the compiled version of this file into
  18    combinations with other programs, and to distribute those
  19    combinations without any restriction coming from the use of this
  20    file.  (The Lesser General Public License restrictions do apply in
  21    other respects; for example, they cover modification of the file,
  22    and distribution when not linked into a combine executable.)
  23
  24    The GNU C Library is distributed in the hope that it will be useful,
  25    but WITHOUT ANY WARRANTY; without even the implied warranty of
  26    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  27    Lesser General Public License for more details.
  28
  29    You should have received a copy of the GNU Lesser General Public
  30    License along with the GNU C Library; if not, see
  31    <http://www.gnu.org/licenses/>.  */
  32
  33 #if _FP_W_TYPE_SIZE < 32
  34 #error "Here's a nickel, kid. Go buy yourself a real computer."
  35 #endif
  36
  37 #if _FP_W_TYPE_SIZE < 64
  38 #define _FP_FRACTBITS_Q         (4*_FP_W_TYPE_SIZE)
  39 #else
  40 #define _FP_FRACTBITS_Q         (2*_FP_W_TYPE_SIZE)
  41 #endif
  42
  43 #define _FP_FRACBITS_Q          113
  44 #define _FP_FRACXBITS_Q         (_FP_FRACTBITS_Q - _FP_FRACBITS_Q)
  45 #define _FP_WFRACBITS_Q         (_FP_WORKBITS + _FP_FRACBITS_Q)
  46 #define _FP_WFRACXBITS_Q        (_FP_FRACTBITS_Q - _FP_WFRACBITS_Q)
  47 #define _FP_EXPBITS_Q           15
  48 #define _FP_EXPBIAS_Q           16383
  49 #define _FP_EXPMAX_Q            32767
  50
  51 #define _FP_QNANBIT_Q           \
  52         ((_FP_W_TYPE)1 << (_FP_FRACBITS_Q-2) % _FP_W_TYPE_SIZE)
  53 #define _FP_QNANBIT_SH_Q                \
  54         ((_FP_W_TYPE)1 << (_FP_FRACBITS_Q-2+_FP_WORKBITS) % _FP_W_TYPE_SIZE)
  55 #define _FP_IMPLBIT_Q           \
  56         ((_FP_W_TYPE)1 << (_FP_FRACBITS_Q-1) % _FP_W_TYPE_SIZE)
  57 #define _FP_IMPLBIT_SH_Q                \
  58         ((_FP_W_TYPE)1 << (_FP_FRACBITS_Q-1+_FP_WORKBITS) % _FP_W_TYPE_SIZE)
  59 #define _FP_OVERFLOW_Q          \
  60         ((_FP_W_TYPE)1 << (_FP_WFRACBITS_Q % _FP_W_TYPE_SIZE))
  61
  62 typedef float TFtype __attribute__((mode(TF)));
  63
  64 #if _FP_W_TYPE_SIZE < 64
  65
  66 union _FP_UNION_Q
  67 {
  68    TFtype flt;
  69    struct
  70    {
  71 #if __BYTE_ORDER == __BIG_ENDIAN
  72       unsigned sign : 1;
  73       unsigned exp : _FP_EXPBITS_Q;
  74       unsigned long frac3 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0)-(_FP_W_TYPE_SIZE * 3);
  75       unsigned long frac2 : _FP_W_TYPE_SIZE;
  76       unsigned long frac1 : _FP_W_TYPE_SIZE;
  77       unsigned long frac0 : _FP_W_TYPE_SIZE;
  78 #else
  79       unsigned long frac0 : _FP_W_TYPE_SIZE;
  80       unsigned long frac1 : _FP_W_TYPE_SIZE;
  81       unsigned long frac2 : _FP_W_TYPE_SIZE;
  82       unsigned long frac3 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0)-(_FP_W_TYPE_SIZE * 3);
  83       unsigned exp : _FP_EXPBITS_Q;
  84       unsigned sign : 1;
  85 #endif /* not bigendian */
  86    } bits __attribute__((packed));
  87 };
  88
  89
  90 #define FP_DECL_Q(X)            _FP_DECL(4,X)
  91 #define FP_UNPACK_RAW_Q(X,val)  _FP_UNPACK_RAW_4(Q,X,val)
  92 #define FP_UNPACK_RAW_QP(X,val) _FP_UNPACK_RAW_4_P(Q,X,val)
  93 #define FP_PACK_RAW_Q(val,X)    _FP_PACK_RAW_4(Q,val,X)
  94 #define FP_PACK_RAW_QP(val,X)           \
  95   do {                                  \
  96     if (!FP_INHIBIT_RESULTS)            \
  97       _FP_PACK_RAW_4_P(Q,val,X);        \
  98   } while (0)
  99
 100 #define FP_UNPACK_Q(X,val)              \
 101   do {                                  \
 102     _FP_UNPACK_RAW_4(Q,X,val);          \
 103     _FP_UNPACK_CANONICAL(Q,4,X);        \
 104   } while (0)
 105
 106 #define FP_UNPACK_QP(X,val)             \
 107   do {                                  \
 108     _FP_UNPACK_RAW_4_P(Q,X,val);        \
 109     _FP_UNPACK_CANONICAL(Q,4,X);        \
 110   } while (0)
 111
 112 #define FP_UNPACK_SEMIRAW_Q(X,val)      \
 113   do {                                  \
 114     _FP_UNPACK_RAW_4(Q,X,val);          \
 115     _FP_UNPACK_SEMIRAW(Q,4,X);          \
 116   } while (0)
 117
 118 #define FP_UNPACK_SEMIRAW_QP(X,val)     \
 119   do {                                  \
 120     _FP_UNPACK_RAW_4_P(Q,X,val);        \
 121     _FP_UNPACK_SEMIRAW(Q,4,X);          \
 122   } while (0)
 123
 124 #define FP_PACK_Q(val,X)                \
 125   do {                                  \
 126     _FP_PACK_CANONICAL(Q,4,X);          \
 127     _FP_PACK_RAW_4(Q,val,X);            \
 128   } while (0)
 129
 130 #define FP_PACK_QP(val,X)               \
 131   do {                                  \
 132     _FP_PACK_CANONICAL(Q,4,X);          \
 133     if (!FP_INHIBIT_RESULTS)            \
 134       _FP_PACK_RAW_4_P(Q,val,X);        \
 135   } while (0)
 136
 137 #define FP_PACK_SEMIRAW_Q(val,X)        \
 138   do {                                  \
 139     _FP_PACK_SEMIRAW(Q,4,X);            \
 140     _FP_PACK_RAW_4(Q,val,X);            \
 141   } while (0)
 142
 143 #define FP_PACK_SEMIRAW_QP(val,X)       \
 144   do {                                  \
 145     _FP_PACK_SEMIRAW(Q,4,X);            \
 146     if (!FP_INHIBIT_RESULTS)            \
 147       _FP_PACK_RAW_4_P(Q,val,X);        \
 148   } while (0)
 149
 150 #define FP_ISSIGNAN_Q(X)                _FP_ISSIGNAN(Q,4,X)
 151 #define FP_NEG_Q(R,X)                   _FP_NEG(Q,4,R,X)
 152 #define FP_ADD_Q(R,X,Y)                 _FP_ADD(Q,4,R,X,Y)
 153 #define FP_SUB_Q(R,X,Y)                 _FP_SUB(Q,4,R,X,Y)
 154 #define FP_MUL_Q(R,X,Y)                 _FP_MUL(Q,4,R,X,Y)
 155 #define FP_DIV_Q(R,X,Y)                 _FP_DIV(Q,4,R,X,Y)
 156 #define FP_SQRT_Q(R,X)                  _FP_SQRT(Q,4,R,X)
 157 #define _FP_SQRT_MEAT_Q(R,S,T,X,Q)      _FP_SQRT_MEAT_4(R,S,T,X,Q)
 158
 159 #define FP_CMP_Q(r,X,Y,un)      _FP_CMP(Q,4,r,X,Y,un)
 160 #define FP_CMP_EQ_Q(r,X,Y)      _FP_CMP_EQ(Q,4,r,X,Y)
 161 #define FP_CMP_UNORD_Q(r,X,Y)   _FP_CMP_UNORD(Q,4,r,X,Y)
 162
 163 #define FP_TO_INT_Q(r,X,rsz,rsg)        _FP_TO_INT(Q,4,r,X,rsz,rsg)
 164 #define FP_FROM_INT_Q(X,r,rs,rt)        _FP_FROM_INT(Q,4,X,r,rs,rt)
 165
 166 #define _FP_FRAC_HIGH_Q(X)      _FP_FRAC_HIGH_4(X)
 167 #define _FP_FRAC_HIGH_RAW_Q(X)  _FP_FRAC_HIGH_4(X)
 168
 169 #else   /* not _FP_W_TYPE_SIZE < 64 */
 170 union _FP_UNION_Q
 171 {
 172   TFtype flt /* __attribute__((mode(TF))) */ ;
 173   struct {
 174     _FP_W_TYPE a, b;
 175   } longs;
 176   struct {
 177 #if __BYTE_ORDER == __BIG_ENDIAN
 178     unsigned sign    : 1;
 179     unsigned exp     : _FP_EXPBITS_Q;
 180     _FP_W_TYPE frac1 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0) - _FP_W_TYPE_SIZE;
 181     _FP_W_TYPE frac0 : _FP_W_TYPE_SIZE;
 182 #else
 183     _FP_W_TYPE frac0 : _FP_W_TYPE_SIZE;
 184     _FP_W_TYPE frac1 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0) - _FP_W_TYPE_SIZE;
 185     unsigned exp     : _FP_EXPBITS_Q;
 186     unsigned sign    : 1;
 187 #endif
 188   } bits;
 189 };
 190
 191 #define FP_DECL_Q(X)            _FP_DECL(2,X)
 192 #define FP_UNPACK_RAW_Q(X,val)  _FP_UNPACK_RAW_2(Q,X,val)
 193 #define FP_UNPACK_RAW_QP(X,val) _FP_UNPACK_RAW_2_P(Q,X,val)
 194 #define FP_PACK_RAW_Q(val,X)    _FP_PACK_RAW_2(Q,val,X)
 195 #define FP_PACK_RAW_QP(val,X)           \
 196   do {                                  \
 197     if (!FP_INHIBIT_RESULTS)            \
 198       _FP_PACK_RAW_2_P(Q,val,X);        \
 199   } while (0)
 200
 201 #define FP_UNPACK_Q(X,val)              \
 202   do {                                  \
 203     _FP_UNPACK_RAW_2(Q,X,val);          \
 204     _FP_UNPACK_CANONICAL(Q,2,X);        \
 205   } while (0)
 206
 207 #define FP_UNPACK_QP(X,val)             \
 208   do {                                  \
 209     _FP_UNPACK_RAW_2_P(Q,X,val);        \
 210     _FP_UNPACK_CANONICAL(Q,2,X);        \
 211   } while (0)
 212
 213 #define FP_UNPACK_SEMIRAW_Q(X,val)      \
 214   do {                                  \
 215     _FP_UNPACK_RAW_2(Q,X,val);          \
 216     _FP_UNPACK_SEMIRAW(Q,2,X);          \
 217   } while (0)
 218
 219 #define FP_UNPACK_SEMIRAW_QP(X,val)     \
 220   do {                                  \
 221     _FP_UNPACK_RAW_2_P(Q,X,val);        \
 222     _FP_UNPACK_SEMIRAW(Q,2,X);          \
 223   } while (0)
 224
 225 #define FP_PACK_Q(val,X)                \
 226   do {                                  \
 227     _FP_PACK_CANONICAL(Q,2,X);          \
 228     _FP_PACK_RAW_2(Q,val,X);            \
 229   } while (0)
 230
 231 #define FP_PACK_QP(val,X)               \
 232   do {                                  \
 233     _FP_PACK_CANONICAL(Q,2,X);          \
 234     if (!FP_INHIBIT_RESULTS)            \
 235       _FP_PACK_RAW_2_P(Q,val,X);        \
 236   } while (0)
 237
 238 #define FP_PACK_SEMIRAW_Q(val,X)        \
 239   do {                                  \
 240     _FP_PACK_SEMIRAW(Q,2,X);            \
 241     _FP_PACK_RAW_2(Q,val,X);            \
 242   } while (0)
 243
 244 #define FP_PACK_SEMIRAW_QP(val,X)       \
 245   do {                                  \
 246     _FP_PACK_SEMIRAW(Q,2,X);            \
 247     if (!FP_INHIBIT_RESULTS)            \
 248       _FP_PACK_RAW_2_P(Q,val,X);        \
 249   } while (0)
 250
 251 #define FP_ISSIGNAN_Q(X)                _FP_ISSIGNAN(Q,2,X)
 252 #define FP_NEG_Q(R,X)                   _FP_NEG(Q,2,R,X)
 253 #define FP_ADD_Q(R,X,Y)                 _FP_ADD(Q,2,R,X,Y)
 254 #define FP_SUB_Q(R,X,Y)                 _FP_SUB(Q,2,R,X,Y)
 255 #define FP_MUL_Q(R,X,Y)                 _FP_MUL(Q,2,R,X,Y)
 256 #define FP_DIV_Q(R,X,Y)                 _FP_DIV(Q,2,R,X,Y)
 257 #define FP_SQRT_Q(R,X)                  _FP_SQRT(Q,2,R,X)
 258 #define _FP_SQRT_MEAT_Q(R,S,T,X,Q)      _FP_SQRT_MEAT_2(R,S,T,X,Q)
 259
 260 #define FP_CMP_Q(r,X,Y,un)      _FP_CMP(Q,2,r,X,Y,un)
 261 #define FP_CMP_EQ_Q(r,X,Y)      _FP_CMP_EQ(Q,2,r,X,Y)
 262 #define FP_CMP_UNORD_Q(r,X,Y)   _FP_CMP_UNORD(Q,2,r,X,Y)
 263
 264 #define FP_TO_INT_Q(r,X,rsz,rsg)        _FP_TO_INT(Q,2,r,X,rsz,rsg)
 265 #define FP_FROM_INT_Q(X,r,rs,rt)        _FP_FROM_INT(Q,2,X,r,rs,rt)
 266
 267 #define _FP_FRAC_HIGH_Q(X)      _FP_FRAC_HIGH_2(X)
 268 #define _FP_FRAC_HIGH_RAW_Q(X)  _FP_FRAC_HIGH_2(X)
 269
 270 #endif /* not _FP_W_TYPE_SIZE < 64 */