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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgcc/] [soft-fp/] [double.h] - Blame information for rev 744

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1 734 jeremybenn 
/* Software floating-point emulation.
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   Definitions for IEEE Double Precision
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   Copyright (C) 1997, 1998, 1999, 2006, 2007, 2008, 2009
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   Free Software Foundation, Inc.
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   This file is part of the GNU C Library.
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   Contributed by Richard Henderson (rth@cygnus.com),
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                  Jakub Jelinek (jj@ultra.linux.cz),
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                  David S. Miller (davem@redhat.com) and
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                  Peter Maydell (pmaydell@chiark.greenend.org.uk).
10 
 
11 
   The GNU C Library is free software; you can redistribute it and/or
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   modify it under the terms of the GNU Lesser General Public
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   License as published by the Free Software Foundation; either
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   version 2.1 of the License, or (at your option) any later version.
15 
 
16 
   In addition to the permissions in the GNU Lesser General Public
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   License, the Free Software Foundation gives you unlimited
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   permission to link the compiled version of this file into
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   combinations with other programs, and to distribute those
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   combinations without any restriction coming from the use of this
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   file.  (The Lesser General Public License restrictions do apply in
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   other respects; for example, they cover modification of the file,
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   and distribution when not linked into a combine executable.)
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25 
   The GNU C Library is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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   Lesser General Public License for more details.
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30 
   You should have received a copy of the GNU Lesser General Public
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   License along with the GNU C Library; if not, write to the Free
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   Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
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   MA 02110-1301, USA.  */
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#if _FP_W_TYPE_SIZE < 32
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#error "Here's a nickel kid.  Go buy yourself a real computer."
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#endif
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#if _FP_W_TYPE_SIZE < 64
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#define _FP_FRACTBITS_D         (2 * _FP_W_TYPE_SIZE)
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#else
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#define _FP_FRACTBITS_D         _FP_W_TYPE_SIZE
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#endif
44 
 
45 
#define _FP_FRACBITS_D          53
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#define _FP_FRACXBITS_D         (_FP_FRACTBITS_D - _FP_FRACBITS_D)
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#define _FP_WFRACBITS_D         (_FP_WORKBITS + _FP_FRACBITS_D)
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#define _FP_WFRACXBITS_D        (_FP_FRACTBITS_D - _FP_WFRACBITS_D)
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#define _FP_EXPBITS_D           11
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#define _FP_EXPBIAS_D           1023
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#define _FP_EXPMAX_D            2047
52 
 
53 
#define _FP_QNANBIT_D           \
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        ((_FP_W_TYPE)1 << (_FP_FRACBITS_D-2) % _FP_W_TYPE_SIZE)
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#define _FP_QNANBIT_SH_D                \
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        ((_FP_W_TYPE)1 << (_FP_FRACBITS_D-2+_FP_WORKBITS) % _FP_W_TYPE_SIZE)
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#define _FP_IMPLBIT_D           \
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        ((_FP_W_TYPE)1 << (_FP_FRACBITS_D-1) % _FP_W_TYPE_SIZE)
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#define _FP_IMPLBIT_SH_D                \
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        ((_FP_W_TYPE)1 << (_FP_FRACBITS_D-1+_FP_WORKBITS) % _FP_W_TYPE_SIZE)
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#define _FP_OVERFLOW_D          \
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        ((_FP_W_TYPE)1 << _FP_WFRACBITS_D % _FP_W_TYPE_SIZE)
63 
 
64 
typedef float DFtype __attribute__((mode(DF)));
65 
 
66 
#if _FP_W_TYPE_SIZE < 64
67 
 
68 
union _FP_UNION_D
69 
{
70 
  DFtype flt;
71 
  struct {
72 
#if __BYTE_ORDER == __BIG_ENDIAN
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    unsigned sign  : 1;
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    unsigned exp   : _FP_EXPBITS_D;
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    unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
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    unsigned frac0 : _FP_W_TYPE_SIZE;
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#else
78 
    unsigned frac0 : _FP_W_TYPE_SIZE;
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    unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
80 
    unsigned exp   : _FP_EXPBITS_D;
81 
    unsigned sign  : 1;
82 
#endif
83 
  } bits __attribute__((packed));
84 
};
85 
 
86 
#define FP_DECL_D(X)            _FP_DECL(2,X)
87 
#define FP_UNPACK_RAW_D(X,val)  _FP_UNPACK_RAW_2(D,X,val)
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#define FP_UNPACK_RAW_DP(X,val) _FP_UNPACK_RAW_2_P(D,X,val)
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#define FP_PACK_RAW_D(val,X)    _FP_PACK_RAW_2(D,val,X)
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#define FP_PACK_RAW_DP(val,X)           \
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  do {                                  \
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    if (!FP_INHIBIT_RESULTS)            \
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      _FP_PACK_RAW_2_P(D,val,X);        \
94 
  } while (0)
95 
 
96 
#define FP_UNPACK_D(X,val)              \
97 
  do {                                  \
98 
    _FP_UNPACK_RAW_2(D,X,val);          \
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    _FP_UNPACK_CANONICAL(D,2,X);        \
100 
  } while (0)
101 
 
102 
#define FP_UNPACK_DP(X,val)             \
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  do {                                  \
104 
    _FP_UNPACK_RAW_2_P(D,X,val);        \
105 
    _FP_UNPACK_CANONICAL(D,2,X);        \
106 
  } while (0)
107 
 
108 
#define FP_UNPACK_SEMIRAW_D(X,val)      \
109 
  do {                                  \
110 
    _FP_UNPACK_RAW_2(D,X,val);          \
111 
    _FP_UNPACK_SEMIRAW(D,2,X);          \
112 
  } while (0)
113 
 
114 
#define FP_UNPACK_SEMIRAW_DP(X,val)     \
115 
  do {                                  \
116 
    _FP_UNPACK_RAW_2_P(D,X,val);        \
117 
    _FP_UNPACK_SEMIRAW(D,2,X);          \
118 
  } while (0)
119 
 
120 
#define FP_PACK_D(val,X)                \
121 
  do {                                  \
122 
    _FP_PACK_CANONICAL(D,2,X);          \
123 
    _FP_PACK_RAW_2(D,val,X);            \
124 
  } while (0)
125 
 
126 
#define FP_PACK_DP(val,X)               \
127 
  do {                                  \
128 
    _FP_PACK_CANONICAL(D,2,X);          \
129 
    if (!FP_INHIBIT_RESULTS)            \
130 
      _FP_PACK_RAW_2_P(D,val,X);        \
131 
  } while (0)
132 
 
133 
#define FP_PACK_SEMIRAW_D(val,X)        \
134 
  do {                                  \
135 
    _FP_PACK_SEMIRAW(D,2,X);            \
136 
    _FP_PACK_RAW_2(D,val,X);            \
137 
  } while (0)
138 
 
139 
#define FP_PACK_SEMIRAW_DP(val,X)       \
140 
  do {                                  \
141 
    _FP_PACK_SEMIRAW(D,2,X);            \
142 
    if (!FP_INHIBIT_RESULTS)            \
143 
      _FP_PACK_RAW_2_P(D,val,X);        \
144 
  } while (0)
145 
 
146 
#define FP_ISSIGNAN_D(X)                _FP_ISSIGNAN(D,2,X)
147 
#define FP_NEG_D(R,X)                   _FP_NEG(D,2,R,X)
148 
#define FP_ADD_D(R,X,Y)                 _FP_ADD(D,2,R,X,Y)
149 
#define FP_SUB_D(R,X,Y)                 _FP_SUB(D,2,R,X,Y)
150 
#define FP_MUL_D(R,X,Y)                 _FP_MUL(D,2,R,X,Y)
151 
#define FP_DIV_D(R,X,Y)                 _FP_DIV(D,2,R,X,Y)
152 
#define FP_SQRT_D(R,X)                  _FP_SQRT(D,2,R,X)
153 
#define _FP_SQRT_MEAT_D(R,S,T,X,Q)      _FP_SQRT_MEAT_2(R,S,T,X,Q)
154 
 
155 
#define FP_CMP_D(r,X,Y,un)      _FP_CMP(D,2,r,X,Y,un)
156 
#define FP_CMP_EQ_D(r,X,Y)      _FP_CMP_EQ(D,2,r,X,Y)
157 
#define FP_CMP_UNORD_D(r,X,Y)   _FP_CMP_UNORD(D,2,r,X,Y)
158 
 
159 
#define FP_TO_INT_D(r,X,rsz,rsg)        _FP_TO_INT(D,2,r,X,rsz,rsg)
160 
#define FP_FROM_INT_D(X,r,rs,rt)        _FP_FROM_INT(D,2,X,r,rs,rt)
161 
 
162 
#define _FP_FRAC_HIGH_D(X)      _FP_FRAC_HIGH_2(X)
163 
#define _FP_FRAC_HIGH_RAW_D(X)  _FP_FRAC_HIGH_2(X)
164 
 
165 
#else
166 
 
167 
union _FP_UNION_D
168 
{
169 
  DFtype flt;
170 
  struct {
171 
#if __BYTE_ORDER == __BIG_ENDIAN
172 
    unsigned sign   : 1;
173 
    unsigned exp    : _FP_EXPBITS_D;
174 
    _FP_W_TYPE frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
175 
#else
176 
    _FP_W_TYPE frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
177 
    unsigned exp    : _FP_EXPBITS_D;
178 
    unsigned sign   : 1;
179 
#endif
180 
  } bits __attribute__((packed));
181 
};
182 
 
183 
#define FP_DECL_D(X)            _FP_DECL(1,X)
184 
#define FP_UNPACK_RAW_D(X,val)  _FP_UNPACK_RAW_1(D,X,val)
185 
#define FP_UNPACK_RAW_DP(X,val) _FP_UNPACK_RAW_1_P(D,X,val)
186 
#define FP_PACK_RAW_D(val,X)    _FP_PACK_RAW_1(D,val,X)
187 
#define FP_PACK_RAW_DP(val,X)           \
188 
  do {                                  \
189 
    if (!FP_INHIBIT_RESULTS)            \
190 
      _FP_PACK_RAW_1_P(D,val,X);        \
191 
  } while (0)
192 
 
193 
#define FP_UNPACK_D(X,val)              \
194 
  do {                                  \
195 
    _FP_UNPACK_RAW_1(D,X,val);          \
196 
    _FP_UNPACK_CANONICAL(D,1,X);        \
197 
  } while (0)
198 
 
199 
#define FP_UNPACK_DP(X,val)             \
200 
  do {                                  \
201 
    _FP_UNPACK_RAW_1_P(D,X,val);        \
202 
    _FP_UNPACK_CANONICAL(D,1,X);        \
203 
  } while (0)
204 
 
205 
#define FP_UNPACK_SEMIRAW_D(X,val)      \
206 
  do {                                  \
207 
    _FP_UNPACK_RAW_1(D,X,val);          \
208 
    _FP_UNPACK_SEMIRAW(D,1,X);          \
209 
  } while (0)
210 
 
211 
#define FP_UNPACK_SEMIRAW_DP(X,val)     \
212 
  do {                                  \
213 
    _FP_UNPACK_RAW_1_P(D,X,val);        \
214 
    _FP_UNPACK_SEMIRAW(D,1,X);          \
215 
  } while (0)
216 
 
217 
#define FP_PACK_D(val,X)                \
218 
  do {                                  \
219 
    _FP_PACK_CANONICAL(D,1,X);          \
220 
    _FP_PACK_RAW_1(D,val,X);            \
221 
  } while (0)
222 
 
223 
#define FP_PACK_DP(val,X)               \
224 
  do {                                  \
225 
    _FP_PACK_CANONICAL(D,1,X);          \
226 
    if (!FP_INHIBIT_RESULTS)            \
227 
      _FP_PACK_RAW_1_P(D,val,X);        \
228 
  } while (0)
229 
 
230 
#define FP_PACK_SEMIRAW_D(val,X)        \
231 
  do {                                  \
232 
    _FP_PACK_SEMIRAW(D,1,X);            \
233 
    _FP_PACK_RAW_1(D,val,X);            \
234 
  } while (0)
235 
 
236 
#define FP_PACK_SEMIRAW_DP(val,X)       \
237 
  do {                                  \
238 
    _FP_PACK_SEMIRAW(D,1,X);            \
239 
    if (!FP_INHIBIT_RESULTS)            \
240 
      _FP_PACK_RAW_1_P(D,val,X);        \
241 
  } while (0)
242 
 
243 
#define FP_ISSIGNAN_D(X)                _FP_ISSIGNAN(D,1,X)
244 
#define FP_NEG_D(R,X)                   _FP_NEG(D,1,R,X)
245 
#define FP_ADD_D(R,X,Y)                 _FP_ADD(D,1,R,X,Y)
246 
#define FP_SUB_D(R,X,Y)                 _FP_SUB(D,1,R,X,Y)
247 
#define FP_MUL_D(R,X,Y)                 _FP_MUL(D,1,R,X,Y)
248 
#define FP_DIV_D(R,X,Y)                 _FP_DIV(D,1,R,X,Y)
249 
#define FP_SQRT_D(R,X)                  _FP_SQRT(D,1,R,X)
250 
#define _FP_SQRT_MEAT_D(R,S,T,X,Q)      _FP_SQRT_MEAT_1(R,S,T,X,Q)
251 
 
252 
/* The implementation of _FP_MUL_D and _FP_DIV_D should be chosen by
253 
   the target machine.  */
254 
 
255 
#define FP_CMP_D(r,X,Y,un)      _FP_CMP(D,1,r,X,Y,un)
256 
#define FP_CMP_EQ_D(r,X,Y)      _FP_CMP_EQ(D,1,r,X,Y)
257 
#define FP_CMP_UNORD_D(r,X,Y)   _FP_CMP_UNORD(D,1,r,X,Y)
258 
 
259 
#define FP_TO_INT_D(r,X,rsz,rsg)        _FP_TO_INT(D,1,r,X,rsz,rsg)
260 
#define FP_FROM_INT_D(X,r,rs,rt)        _FP_FROM_INT(D,1,X,r,rs,rt)
261 
 
262 
#define _FP_FRAC_HIGH_D(X)      _FP_FRAC_HIGH_1(X)
263 
#define _FP_FRAC_HIGH_RAW_D(X)  _FP_FRAC_HIGH_1(X)
264 
 
265 
#endif /* W_TYPE_SIZE < 64 */

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