soft-fp/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 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    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    Lesser General Public License for more details.
  19
  20    You should have received a copy of the GNU Lesser General Public
  21    License along with the GNU C Library; if not, write to the Free
  22    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  23    02111-1307 USA.  */
  24
  25 #if _FP_W_TYPE_SIZE < 32
  26 #error "Here's a nickel, kid. Go buy yourself a real computer."
  27 #endif
  28
  29 #if _FP_W_TYPE_SIZE < 64
  30 #define _FP_FRACTBITS_Q         (4*_FP_W_TYPE_SIZE)
  31 #else
  32 #define _FP_FRACTBITS_Q         (2*_FP_W_TYPE_SIZE)
  33 #endif
  34
  35 #define _FP_FRACBITS_Q          113
  36 #define _FP_FRACXBITS_Q         (_FP_FRACTBITS_Q - _FP_FRACBITS_Q)
  37 #define _FP_WFRACBITS_Q         (_FP_WORKBITS + _FP_FRACBITS_Q)
  38 #define _FP_WFRACXBITS_Q        (_FP_FRACTBITS_Q - _FP_WFRACBITS_Q)
  39 #define _FP_EXPBITS_Q           15
  40 #define _FP_EXPBIAS_Q           16383
  41 #define _FP_EXPMAX_Q            32767
  42
  43 #define _FP_QNANBIT_Q           \
  44         ((_FP_W_TYPE)1 << (_FP_FRACBITS_Q-2) % _FP_W_TYPE_SIZE)
  45 #define _FP_IMPLBIT_Q           \
  46         ((_FP_W_TYPE)1 << (_FP_FRACBITS_Q-1) % _FP_W_TYPE_SIZE)
  47 #define _FP_OVERFLOW_Q          \
  48         ((_FP_W_TYPE)1 << (_FP_WFRACBITS_Q % _FP_W_TYPE_SIZE))
  49
  50 #if _FP_W_TYPE_SIZE < 64
  51
  52 union _FP_UNION_Q
  53 {
  54    long double flt;
  55    struct
  56    {
  57 #if __BYTE_ORDER == __BIG_ENDIAN
  58       unsigned sign : 1;
  59       unsigned exp : _FP_EXPBITS_Q;
  60       unsigned long frac3 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0)-(_FP_W_TYPE_SIZE * 3);
  61       unsigned long frac2 : _FP_W_TYPE_SIZE;
  62       unsigned long frac1 : _FP_W_TYPE_SIZE;
  63       unsigned long frac0 : _FP_W_TYPE_SIZE;
  64 #else
  65       unsigned long frac0 : _FP_W_TYPE_SIZE;
  66       unsigned long frac1 : _FP_W_TYPE_SIZE;
  67       unsigned long frac2 : _FP_W_TYPE_SIZE;
  68       unsigned long frac3 : _FP_FRACBITS_Q - (_FP_IMPLBIT_Q != 0)-(_FP_W_TYPE_SIZE * 3);
  69       unsigned exp : _FP_EXPBITS_Q;
  70       unsigned sign : 1;
  71 #endif /* not bigendian */
  72    } bits __attribute__((packed));
  73 };
  74
  75
  76 #define FP_DECL_Q(X)            _FP_DECL(4,X)
  77 #define FP_UNPACK_RAW_Q(X,val)  _FP_UNPACK_RAW_4(Q,X,val)
  78 #define FP_UNPACK_RAW_QP(X,val) _FP_UNPACK_RAW_4_P(Q,X,val)
  79 #define FP_PACK_RAW_Q(val,X)    _FP_PACK_RAW_4(Q,val,X)
  80 #define FP_PACK_RAW_QP(val,X)           \
  81   do {                                  \
  82     if (!FP_INHIBIT_RESULTS)            \
  83       _FP_PACK_RAW_4_P(Q,val,X);        \
  84   } while (0)
  85
  86 #define FP_UNPACK_Q(X,val)              \
  87   do {                                  \
  88     _FP_UNPACK_RAW_4(Q,X,val);          \
  89     _FP_UNPACK_CANONICAL(Q,4,X);        \
  90   } while (0)
  91
  92 #define FP_UNPACK_QP(X,val)             \
  93   do {                                  \
  94     _FP_UNPACK_RAW_4_P(Q,X,val);        \
  95     _FP_UNPACK_CANONICAL(Q,4,X);        \
  96   } while (0)
  97
  98 #define FP_PACK_Q(val,X)                \
  99   do {                                  \
 100     _FP_PACK_CANONICAL(Q,4,X);          \
 101     _FP_PACK_RAW_4(Q,val,X);            \
 102   } while (0)
 103
 104 #define FP_PACK_QP(val,X)               \
 105   do {                                  \
 106     _FP_PACK_CANONICAL(Q,4,X);          \
 107     if (!FP_INHIBIT_RESULTS)            \
 108       _FP_PACK_RAW_4_P(Q,val,X);        \
 109   } while (0)
 110
 111 #define FP_ISSIGNAN_Q(X)                _FP_ISSIGNAN(Q,4,X)
 112 #define FP_NEG_Q(R,X)                   _FP_NEG(Q,4,R,X)
 113 #define FP_ADD_Q(R,X,Y)                 _FP_ADD(Q,4,R,X,Y)
 114 #define FP_SUB_Q(R,X,Y)                 _FP_SUB(Q,4,R,X,Y)
 115 #define FP_MUL_Q(R,X,Y)                 _FP_MUL(Q,4,R,X,Y)
 116 #define FP_DIV_Q(R,X,Y)                 _FP_DIV(Q,4,R,X,Y)
 117 #define FP_SQRT_Q(R,X)                  _FP_SQRT(Q,4,R,X)
 118 #define _FP_SQRT_MEAT_Q(R,S,T,X,Q)      _FP_SQRT_MEAT_4(R,S,T,X,Q)
 119
 120 #define FP_CMP_Q(r,X,Y,un)      _FP_CMP(Q,4,r,X,Y,un)
 121 #define FP_CMP_EQ_Q(r,X,Y)      _FP_CMP_EQ(Q,4,r,X,Y)
 122
 123 #define FP_TO_INT_Q(r,X,rsz,rsg)        _FP_TO_INT(Q,4,r,X,rsz,rsg)
 124 #define FP_FROM_INT_Q(X,r,rs,rt)        _FP_FROM_INT(Q,4,X,r,rs,rt)
 125
 126 #define _FP_FRAC_HIGH_Q(X)      _FP_FRAC_HIGH_4(X)
 127 #define _FP_FRAC_HIGH_RAW_Q(X)  _FP_FRAC_HIGH_4(X)
 128
 129 #else   /* not _FP_W_TYPE_SIZE < 64 */
 130 union _FP_UNION_Q
 131 {
 132   long double flt /* __attribute__((mode(TF))) */ ;
 133   struct {
 134     _FP_W_TYPE a, b;
 135   } longs;
 136   struct {
 137 #if __BYTE_ORDER == __BIG_ENDIAN
 138     unsigned sign  : 1;
 139     unsigned exp   : _FP_EXPBITS_Q;
 140     unsigned long frac1 : _FP_FRACBITS_Q-(_FP_IMPLBIT_Q != 0)-_FP_W_TYPE_SIZE;
 141     unsigned long frac0 : _FP_W_TYPE_SIZE;
 142 #else
 143     unsigned long frac0 : _FP_W_TYPE_SIZE;
 144     unsigned long frac1 : _FP_FRACBITS_Q-(_FP_IMPLBIT_Q != 0)-_FP_W_TYPE_SIZE;
 145     unsigned exp   : _FP_EXPBITS_Q;
 146     unsigned sign  : 1;
 147 #endif
 148   } bits;
 149 };
 150
 151 #define FP_DECL_Q(X)            _FP_DECL(2,X)
 152 #define FP_UNPACK_RAW_Q(X,val)  _FP_UNPACK_RAW_2(Q,X,val)
 153 #define FP_UNPACK_RAW_QP(X,val) _FP_UNPACK_RAW_2_P(Q,X,val)
 154 #define FP_PACK_RAW_Q(val,X)    _FP_PACK_RAW_2(Q,val,X)
 155 #define FP_PACK_RAW_QP(val,X)           \
 156   do {                                  \
 157     if (!FP_INHIBIT_RESULTS)            \
 158       _FP_PACK_RAW_2_P(Q,val,X);        \
 159   } while (0)
 160
 161 #define FP_UNPACK_Q(X,val)              \
 162   do {                                  \
 163     _FP_UNPACK_RAW_2(Q,X,val);          \
 164     _FP_UNPACK_CANONICAL(Q,2,X);        \
 165   } while (0)
 166
 167 #define FP_UNPACK_QP(X,val)             \
 168   do {                                  \
 169     _FP_UNPACK_RAW_2_P(Q,X,val);        \
 170     _FP_UNPACK_CANONICAL(Q,2,X);        \
 171   } while (0)
 172
 173 #define FP_PACK_Q(val,X)                \
 174   do {                                  \
 175     _FP_PACK_CANONICAL(Q,2,X);          \
 176     _FP_PACK_RAW_2(Q,val,X);            \
 177   } while (0)
 178
 179 #define FP_PACK_QP(val,X)               \
 180   do {                                  \
 181     _FP_PACK_CANONICAL(Q,2,X);          \
 182     if (!FP_INHIBIT_RESULTS)            \
 183       _FP_PACK_RAW_2_P(Q,val,X);        \
 184   } while (0)
 185
 186 #define FP_ISSIGNAN_Q(X)                _FP_ISSIGNAN(Q,2,X)
 187 #define FP_NEG_Q(R,X)                   _FP_NEG(Q,2,R,X)
 188 #define FP_ADD_Q(R,X,Y)                 _FP_ADD(Q,2,R,X,Y)
 189 #define FP_SUB_Q(R,X,Y)                 _FP_SUB(Q,2,R,X,Y)
 190 #define FP_MUL_Q(R,X,Y)                 _FP_MUL(Q,2,R,X,Y)
 191 #define FP_DIV_Q(R,X,Y)                 _FP_DIV(Q,2,R,X,Y)
 192 #define FP_SQRT_Q(R,X)                  _FP_SQRT(Q,2,R,X)
 193 #define _FP_SQRT_MEAT_Q(R,S,T,X,Q)      _FP_SQRT_MEAT_2(R,S,T,X,Q)
 194
 195 #define FP_CMP_Q(r,X,Y,un)      _FP_CMP(Q,2,r,X,Y,un)
 196 #define FP_CMP_EQ_Q(r,X,Y)      _FP_CMP_EQ(Q,2,r,X,Y)
 197
 198 #define FP_TO_INT_Q(r,X,rsz,rsg)        _FP_TO_INT(Q,2,r,X,rsz,rsg)
 199 #define FP_FROM_INT_Q(X,r,rs,rt)        _FP_FROM_INT(Q,2,X,r,rs,rt)
 200
 201 #define _FP_FRAC_HIGH_Q(X)      _FP_FRAC_HIGH_2(X)
 202 #define _FP_FRAC_HIGH_RAW_Q(X)  _FP_FRAC_HIGH_2(X)
 203
 204 #endif /* not _FP_W_TYPE_SIZE < 64 */