soft-fp/quad.h

   1 /* Software floating-point emulation.
   2    Definitions for IEEE Quad Precision.
   3    Copyright (C) 1997-2013 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 #define _FP_FRACTBITS_DW_Q      (8*_FP_W_TYPE_SIZE)
  40 #else
  41 #define _FP_FRACTBITS_Q         (2*_FP_W_TYPE_SIZE)
  42 #define _FP_FRACTBITS_DW_Q      (4*_FP_W_TYPE_SIZE)
  43 #endif
  44
  45 #define _FP_FRACBITS_Q          113
  46 #define _FP_FRACXBITS_Q         (_FP_FRACTBITS_Q - _FP_FRACBITS_Q)
  47 #define _FP_WFRACBITS_Q         (_FP_WORKBITS + _FP_FRACBITS_Q)
  48 #define _FP_WFRACXBITS_Q        (_FP_FRACTBITS_Q - _FP_WFRACBITS_Q)
  49 #define _FP_EXPBITS_Q           15
  50 #define _FP_EXPBIAS_Q           16383
  51 #define _FP_EXPMAX_Q            32767
  52
  53 #define _FP_QNANBIT_Q           \
  54         ((_FP_W_TYPE)1 << (_FP_FRACBITS_Q-2) % _FP_W_TYPE_SIZE)
  55 #define _FP_QNANBIT_SH_Q                \
  56         ((_FP_W_TYPE)1 << (_FP_FRACBITS_Q-2+_FP_WORKBITS) % _FP_W_TYPE_SIZE)
  57 #define _FP_IMPLBIT_Q           \
  58         ((_FP_W_TYPE)1 << (_FP_FRACBITS_Q-1) % _FP_W_TYPE_SIZE)
  59 #define _FP_IMPLBIT_SH_Q                \
  60         ((_FP_W_TYPE)1 << (_FP_FRACBITS_Q-1+_FP_WORKBITS) % _FP_W_TYPE_SIZE)
  61 #define _FP_OVERFLOW_Q          \
  62         ((_FP_W_TYPE)1 << (_FP_WFRACBITS_Q % _FP_W_TYPE_SIZE))
  63
  64 #define _FP_WFRACBITS_DW_Q      (2 * _FP_WFRACBITS_Q)
  65 #define _FP_WFRACXBITS_DW_Q     (_FP_FRACTBITS_DW_Q - _FP_WFRACBITS_DW_Q)
  66 #define _FP_HIGHBIT_DW_Q        \
  67   ((_FP_W_TYPE)1 << (_FP_WFRACBITS_DW_Q - 1) % _FP_W_TYPE_SIZE)
  68
  69 typedef float TFtype __attribute__((mode(TF)));
  70
  71 #if _FP_W_TYPE_SIZE < 64
  72
  73 union _FP_UNION_Q
  74 {
  75    TFtype flt;
  76    struct _FP_STRUCT_LAYOUT
  77    {
  78 #if __BYTE_ORDER == __BIG_ENDIAN
  79       unsigned sign : 1;
  80       unsigned exp : _FP_EXPBITS_Q;
  81       unsigned long frac3 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0)-(_FP_W_TYPE_SIZE * 3);
  82       unsigned long frac2 : _FP_W_TYPE_SIZE;
  83       unsigned long frac1 : _FP_W_TYPE_SIZE;
  84       unsigned long frac0 : _FP_W_TYPE_SIZE;
  85 #else
  86       unsigned long frac0 : _FP_W_TYPE_SIZE;
  87       unsigned long frac1 : _FP_W_TYPE_SIZE;
  88       unsigned long frac2 : _FP_W_TYPE_SIZE;
  89       unsigned long frac3 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0)-(_FP_W_TYPE_SIZE * 3);
  90       unsigned exp : _FP_EXPBITS_Q;
  91       unsigned sign : 1;
  92 #endif /* not bigendian */
  93    } bits __attribute__((packed));
  94 };
  95
  96
  97 #define FP_DECL_Q(X)            _FP_DECL(4,X)
  98 #define FP_UNPACK_RAW_Q(X,val)  _FP_UNPACK_RAW_4(Q,X,val)
  99 #define FP_UNPACK_RAW_QP(X,val) _FP_UNPACK_RAW_4_P(Q,X,val)
 100 #define FP_PACK_RAW_Q(val,X)    _FP_PACK_RAW_4(Q,val,X)
 101 #define FP_PACK_RAW_QP(val,X)           \
 102   do {                                  \
 103     if (!FP_INHIBIT_RESULTS)            \
 104       _FP_PACK_RAW_4_P(Q,val,X);        \
 105   } while (0)
 106
 107 #define FP_UNPACK_Q(X,val)              \
 108   do {                                  \
 109     _FP_UNPACK_RAW_4(Q,X,val);          \
 110     _FP_UNPACK_CANONICAL(Q,4,X);        \
 111   } while (0)
 112
 113 #define FP_UNPACK_QP(X,val)             \
 114   do {                                  \
 115     _FP_UNPACK_RAW_4_P(Q,X,val);        \
 116     _FP_UNPACK_CANONICAL(Q,4,X);        \
 117   } while (0)
 118
 119 #define FP_UNPACK_SEMIRAW_Q(X,val)      \
 120   do {                                  \
 121     _FP_UNPACK_RAW_4(Q,X,val);          \
 122     _FP_UNPACK_SEMIRAW(Q,4,X);          \
 123   } while (0)
 124
 125 #define FP_UNPACK_SEMIRAW_QP(X,val)     \
 126   do {                                  \
 127     _FP_UNPACK_RAW_4_P(Q,X,val);        \
 128     _FP_UNPACK_SEMIRAW(Q,4,X);          \
 129   } while (0)
 130
 131 #define FP_PACK_Q(val,X)                \
 132   do {                                  \
 133     _FP_PACK_CANONICAL(Q,4,X);          \
 134     _FP_PACK_RAW_4(Q,val,X);            \
 135   } while (0)
 136
 137 #define FP_PACK_QP(val,X)               \
 138   do {                                  \
 139     _FP_PACK_CANONICAL(Q,4,X);          \
 140     if (!FP_INHIBIT_RESULTS)            \
 141       _FP_PACK_RAW_4_P(Q,val,X);        \
 142   } while (0)
 143
 144 #define FP_PACK_SEMIRAW_Q(val,X)        \
 145   do {                                  \
 146     _FP_PACK_SEMIRAW(Q,4,X);            \
 147     _FP_PACK_RAW_4(Q,val,X);            \
 148   } while (0)
 149
 150 #define FP_PACK_SEMIRAW_QP(val,X)       \
 151   do {                                  \
 152     _FP_PACK_SEMIRAW(Q,4,X);            \
 153     if (!FP_INHIBIT_RESULTS)            \
 154       _FP_PACK_RAW_4_P(Q,val,X);        \
 155   } while (0)
 156
 157 #define FP_ISSIGNAN_Q(X)                _FP_ISSIGNAN(Q,4,X)
 158 #define FP_NEG_Q(R,X)                   _FP_NEG(Q,4,R,X)
 159 #define FP_ADD_Q(R,X,Y)                 _FP_ADD(Q,4,R,X,Y)
 160 #define FP_SUB_Q(R,X,Y)                 _FP_SUB(Q,4,R,X,Y)
 161 #define FP_MUL_Q(R,X,Y)                 _FP_MUL(Q,4,R,X,Y)
 162 #define FP_DIV_Q(R,X,Y)                 _FP_DIV(Q,4,R,X,Y)
 163 #define FP_SQRT_Q(R,X)                  _FP_SQRT(Q,4,R,X)
 164 #define _FP_SQRT_MEAT_Q(R,S,T,X,Q)      _FP_SQRT_MEAT_4(R,S,T,X,Q)
 165 #define FP_FMA_Q(R,X,Y,Z)               _FP_FMA(Q,4,8,R,X,Y,Z)
 166
 167 #define FP_CMP_Q(r,X,Y,un)      _FP_CMP(Q,4,r,X,Y,un)
 168 #define FP_CMP_EQ_Q(r,X,Y)      _FP_CMP_EQ(Q,4,r,X,Y)
 169 #define FP_CMP_UNORD_Q(r,X,Y)   _FP_CMP_UNORD(Q,4,r,X,Y)
 170
 171 #define FP_TO_INT_Q(r,X,rsz,rsg)        _FP_TO_INT(Q,4,r,X,rsz,rsg)
 172 #define FP_FROM_INT_Q(X,r,rs,rt)        _FP_FROM_INT(Q,4,X,r,rs,rt)
 173
 174 #define _FP_FRAC_HIGH_Q(X)      _FP_FRAC_HIGH_4(X)
 175 #define _FP_FRAC_HIGH_RAW_Q(X)  _FP_FRAC_HIGH_4(X)
 176
 177 #define _FP_FRAC_HIGH_DW_Q(X)   _FP_FRAC_HIGH_8(X)
 178
 179 #else   /* not _FP_W_TYPE_SIZE < 64 */
 180 union _FP_UNION_Q
 181 {
 182   TFtype flt /* __attribute__((mode(TF))) */ ;
 183   struct _FP_STRUCT_LAYOUT {
 184     _FP_W_TYPE a, b;
 185   } longs;
 186   struct _FP_STRUCT_LAYOUT {
 187 #if __BYTE_ORDER == __BIG_ENDIAN
 188     unsigned sign    : 1;
 189     unsigned exp     : _FP_EXPBITS_Q;
 190     _FP_W_TYPE frac1 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0) - _FP_W_TYPE_SIZE;
 191     _FP_W_TYPE frac0 : _FP_W_TYPE_SIZE;
 192 #else
 193     _FP_W_TYPE frac0 : _FP_W_TYPE_SIZE;
 194     _FP_W_TYPE frac1 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0) - _FP_W_TYPE_SIZE;
 195     unsigned exp     : _FP_EXPBITS_Q;
 196     unsigned sign    : 1;
 197 #endif
 198   } bits;
 199 };
 200
 201 #define FP_DECL_Q(X)            _FP_DECL(2,X)
 202 #define FP_UNPACK_RAW_Q(X,val)  _FP_UNPACK_RAW_2(Q,X,val)
 203 #define FP_UNPACK_RAW_QP(X,val) _FP_UNPACK_RAW_2_P(Q,X,val)
 204 #define FP_PACK_RAW_Q(val,X)    _FP_PACK_RAW_2(Q,val,X)
 205 #define FP_PACK_RAW_QP(val,X)           \
 206   do {                                  \
 207     if (!FP_INHIBIT_RESULTS)            \
 208       _FP_PACK_RAW_2_P(Q,val,X);        \
 209   } while (0)
 210
 211 #define FP_UNPACK_Q(X,val)              \
 212   do {                                  \
 213     _FP_UNPACK_RAW_2(Q,X,val);          \
 214     _FP_UNPACK_CANONICAL(Q,2,X);        \
 215   } while (0)
 216
 217 #define FP_UNPACK_QP(X,val)             \
 218   do {                                  \
 219     _FP_UNPACK_RAW_2_P(Q,X,val);        \
 220     _FP_UNPACK_CANONICAL(Q,2,X);        \
 221   } while (0)
 222
 223 #define FP_UNPACK_SEMIRAW_Q(X,val)      \
 224   do {                                  \
 225     _FP_UNPACK_RAW_2(Q,X,val);          \
 226     _FP_UNPACK_SEMIRAW(Q,2,X);          \
 227   } while (0)
 228
 229 #define FP_UNPACK_SEMIRAW_QP(X,val)     \
 230   do {                                  \
 231     _FP_UNPACK_RAW_2_P(Q,X,val);        \
 232     _FP_UNPACK_SEMIRAW(Q,2,X);          \
 233   } while (0)
 234
 235 #define FP_PACK_Q(val,X)                \
 236   do {                                  \
 237     _FP_PACK_CANONICAL(Q,2,X);          \
 238     _FP_PACK_RAW_2(Q,val,X);            \
 239   } while (0)
 240
 241 #define FP_PACK_QP(val,X)               \
 242   do {                                  \
 243     _FP_PACK_CANONICAL(Q,2,X);          \
 244     if (!FP_INHIBIT_RESULTS)            \
 245       _FP_PACK_RAW_2_P(Q,val,X);        \
 246   } while (0)
 247
 248 #define FP_PACK_SEMIRAW_Q(val,X)        \
 249   do {                                  \
 250     _FP_PACK_SEMIRAW(Q,2,X);            \
 251     _FP_PACK_RAW_2(Q,val,X);            \
 252   } while (0)
 253
 254 #define FP_PACK_SEMIRAW_QP(val,X)       \
 255   do {                                  \
 256     _FP_PACK_SEMIRAW(Q,2,X);            \
 257     if (!FP_INHIBIT_RESULTS)            \
 258       _FP_PACK_RAW_2_P(Q,val,X);        \
 259   } while (0)
 260
 261 #define FP_ISSIGNAN_Q(X)                _FP_ISSIGNAN(Q,2,X)
 262 #define FP_NEG_Q(R,X)                   _FP_NEG(Q,2,R,X)
 263 #define FP_ADD_Q(R,X,Y)                 _FP_ADD(Q,2,R,X,Y)
 264 #define FP_SUB_Q(R,X,Y)                 _FP_SUB(Q,2,R,X,Y)
 265 #define FP_MUL_Q(R,X,Y)                 _FP_MUL(Q,2,R,X,Y)
 266 #define FP_DIV_Q(R,X,Y)                 _FP_DIV(Q,2,R,X,Y)
 267 #define FP_SQRT_Q(R,X)                  _FP_SQRT(Q,2,R,X)
 268 #define _FP_SQRT_MEAT_Q(R,S,T,X,Q)      _FP_SQRT_MEAT_2(R,S,T,X,Q)
 269 #define FP_FMA_Q(R,X,Y,Z)               _FP_FMA(Q,2,4,R,X,Y,Z)
 270
 271 #define FP_CMP_Q(r,X,Y,un)      _FP_CMP(Q,2,r,X,Y,un)
 272 #define FP_CMP_EQ_Q(r,X,Y)      _FP_CMP_EQ(Q,2,r,X,Y)
 273 #define FP_CMP_UNORD_Q(r,X,Y)   _FP_CMP_UNORD(Q,2,r,X,Y)
 274
 275 #define FP_TO_INT_Q(r,X,rsz,rsg)        _FP_TO_INT(Q,2,r,X,rsz,rsg)
 276 #define FP_FROM_INT_Q(X,r,rs,rt)        _FP_FROM_INT(Q,2,X,r,rs,rt)
 277
 278 #define _FP_FRAC_HIGH_Q(X)      _FP_FRAC_HIGH_2(X)
 279 #define _FP_FRAC_HIGH_RAW_Q(X)  _FP_FRAC_HIGH_2(X)
 280
 281 #define _FP_FRAC_HIGH_DW_Q(X)   _FP_FRAC_HIGH_4(X)
 282
 283 #endif /* not _FP_W_TYPE_SIZE < 64 */