1 /* Software floating-point emulation.
2 Definitions for IEEE Double Precision
3 Copyright (C) 1997-2015 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).
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.
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.)
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.
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/>. */
33 #if _FP_W_TYPE_SIZE < 32
34 # error "Here's a nickel kid. Go buy yourself a real computer."
37 #if _FP_W_TYPE_SIZE < 64
38 # define _FP_FRACTBITS_D (2 * _FP_W_TYPE_SIZE)
39 # define _FP_FRACTBITS_DW_D (4 * _FP_W_TYPE_SIZE)
41 # define _FP_FRACTBITS_D _FP_W_TYPE_SIZE
42 # define _FP_FRACTBITS_DW_D (2 * _FP_W_TYPE_SIZE)
45 #define _FP_FRACBITS_D 53
46 #define _FP_FRACXBITS_D (_FP_FRACTBITS_D - _FP_FRACBITS_D)
47 #define _FP_WFRACBITS_D (_FP_WORKBITS + _FP_FRACBITS_D)
48 #define _FP_WFRACXBITS_D (_FP_FRACTBITS_D - _FP_WFRACBITS_D)
49 #define _FP_EXPBITS_D 11
50 #define _FP_EXPBIAS_D 1023
51 #define _FP_EXPMAX_D 2047
53 #define _FP_QNANBIT_D \
54 ((_FP_W_TYPE) 1 << (_FP_FRACBITS_D-2) % _FP_W_TYPE_SIZE)
55 #define _FP_QNANBIT_SH_D \
56 ((_FP_W_TYPE) 1 << (_FP_FRACBITS_D-2+_FP_WORKBITS) % _FP_W_TYPE_SIZE)
57 #define _FP_IMPLBIT_D \
58 ((_FP_W_TYPE) 1 << (_FP_FRACBITS_D-1) % _FP_W_TYPE_SIZE)
59 #define _FP_IMPLBIT_SH_D \
60 ((_FP_W_TYPE) 1 << (_FP_FRACBITS_D-1+_FP_WORKBITS) % _FP_W_TYPE_SIZE)
61 #define _FP_OVERFLOW_D \
62 ((_FP_W_TYPE) 1 << _FP_WFRACBITS_D % _FP_W_TYPE_SIZE)
64 #define _FP_WFRACBITS_DW_D (2 * _FP_WFRACBITS_D)
65 #define _FP_WFRACXBITS_DW_D (_FP_FRACTBITS_DW_D - _FP_WFRACBITS_DW_D)
66 #define _FP_HIGHBIT_DW_D \
67 ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_DW_D - 1) % _FP_W_TYPE_SIZE)
69 typedef float DFtype __attribute__ ((mode (DF)));
71 #if _FP_W_TYPE_SIZE < 64
76 struct _FP_STRUCT_LAYOUT
78 # if __BYTE_ORDER == __BIG_ENDIAN
80 unsigned exp : _FP_EXPBITS_D;
81 unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
82 unsigned frac0 : _FP_W_TYPE_SIZE;
84 unsigned frac0 : _FP_W_TYPE_SIZE;
85 unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
86 unsigned exp : _FP_EXPBITS_D;
89 } bits __attribute__ ((packed));
92 # define FP_DECL_D(X) _FP_DECL (2, X)
93 # define FP_UNPACK_RAW_D(X, val) _FP_UNPACK_RAW_2 (D, X, (val))
94 # define FP_UNPACK_RAW_DP(X, val) _FP_UNPACK_RAW_2_P (D, X, (val))
95 # define FP_PACK_RAW_D(val, X) _FP_PACK_RAW_2 (D, (val), X)
96 # define FP_PACK_RAW_DP(val, X) \
99 if (!FP_INHIBIT_RESULTS) \
100 _FP_PACK_RAW_2_P (D, (val), X); \
104 # define FP_UNPACK_D(X, val) \
107 _FP_UNPACK_RAW_2 (D, X, (val)); \
108 _FP_UNPACK_CANONICAL (D, 2, X); \
112 # define FP_UNPACK_DP(X, val) \
115 _FP_UNPACK_RAW_2_P (D, X, (val)); \
116 _FP_UNPACK_CANONICAL (D, 2, X); \
120 # define FP_UNPACK_SEMIRAW_D(X, val) \
123 _FP_UNPACK_RAW_2 (D, X, (val)); \
124 _FP_UNPACK_SEMIRAW (D, 2, X); \
128 # define FP_UNPACK_SEMIRAW_DP(X, val) \
131 _FP_UNPACK_RAW_2_P (D, X, (val)); \
132 _FP_UNPACK_SEMIRAW (D, 2, X); \
136 # define FP_PACK_D(val, X) \
139 _FP_PACK_CANONICAL (D, 2, X); \
140 _FP_PACK_RAW_2 (D, (val), X); \
144 # define FP_PACK_DP(val, X) \
147 _FP_PACK_CANONICAL (D, 2, X); \
148 if (!FP_INHIBIT_RESULTS) \
149 _FP_PACK_RAW_2_P (D, (val), X); \
153 # define FP_PACK_SEMIRAW_D(val, X) \
156 _FP_PACK_SEMIRAW (D, 2, X); \
157 _FP_PACK_RAW_2 (D, (val), X); \
161 # define FP_PACK_SEMIRAW_DP(val, X) \
164 _FP_PACK_SEMIRAW (D, 2, X); \
165 if (!FP_INHIBIT_RESULTS) \
166 _FP_PACK_RAW_2_P (D, (val), X); \
170 # define FP_ISSIGNAN_D(X) _FP_ISSIGNAN (D, 2, X)
171 # define FP_NEG_D(R, X) _FP_NEG (D, 2, R, X)
172 # define FP_ADD_D(R, X, Y) _FP_ADD (D, 2, R, X, Y)
173 # define FP_SUB_D(R, X, Y) _FP_SUB (D, 2, R, X, Y)
174 # define FP_MUL_D(R, X, Y) _FP_MUL (D, 2, R, X, Y)
175 # define FP_DIV_D(R, X, Y) _FP_DIV (D, 2, R, X, Y)
176 # define FP_SQRT_D(R, X) _FP_SQRT (D, 2, R, X)
177 # define _FP_SQRT_MEAT_D(R, S, T, X, Q) _FP_SQRT_MEAT_2 (R, S, T, X, (Q))
178 # define FP_FMA_D(R, X, Y, Z) _FP_FMA (D, 2, 4, R, X, Y, Z)
180 # define FP_CMP_D(r, X, Y, un, ex) _FP_CMP (D, 2, (r), X, Y, (un), (ex))
181 # define FP_CMP_EQ_D(r, X, Y, ex) _FP_CMP_EQ (D, 2, (r), X, Y, (ex))
182 # define FP_CMP_UNORD_D(r, X, Y, ex) _FP_CMP_UNORD (D, 2, (r), X, Y, (ex))
184 # define FP_TO_INT_D(r, X, rsz, rsg) _FP_TO_INT (D, 2, (r), X, (rsz), (rsg))
185 # define FP_TO_INT_ROUND_D(r, X, rsz, rsg) \
186 _FP_TO_INT_ROUND (D, 2, (r), X, (rsz), (rsg))
187 # define FP_FROM_INT_D(X, r, rs, rt) _FP_FROM_INT (D, 2, X, (r), (rs), rt)
189 # define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_2 (X)
190 # define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_2 (X)
192 # define _FP_FRAC_HIGH_DW_D(X) _FP_FRAC_HIGH_4 (X)
199 struct _FP_STRUCT_LAYOUT
201 # if __BYTE_ORDER == __BIG_ENDIAN
203 unsigned exp : _FP_EXPBITS_D;
204 _FP_W_TYPE frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
206 _FP_W_TYPE frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
207 unsigned exp : _FP_EXPBITS_D;
210 } bits __attribute__ ((packed));
213 # define FP_DECL_D(X) _FP_DECL (1, X)
214 # define FP_UNPACK_RAW_D(X, val) _FP_UNPACK_RAW_1 (D, X, (val))
215 # define FP_UNPACK_RAW_DP(X, val) _FP_UNPACK_RAW_1_P (D, X, (val))
216 # define FP_PACK_RAW_D(val, X) _FP_PACK_RAW_1 (D, (val), X)
217 # define FP_PACK_RAW_DP(val, X) \
220 if (!FP_INHIBIT_RESULTS) \
221 _FP_PACK_RAW_1_P (D, (val), X); \
225 # define FP_UNPACK_D(X, val) \
228 _FP_UNPACK_RAW_1 (D, X, (val)); \
229 _FP_UNPACK_CANONICAL (D, 1, X); \
233 # define FP_UNPACK_DP(X, val) \
236 _FP_UNPACK_RAW_1_P (D, X, (val)); \
237 _FP_UNPACK_CANONICAL (D, 1, X); \
241 # define FP_UNPACK_SEMIRAW_D(X, val) \
244 _FP_UNPACK_RAW_1 (D, X, (val)); \
245 _FP_UNPACK_SEMIRAW (D, 1, X); \
249 # define FP_UNPACK_SEMIRAW_DP(X, val) \
252 _FP_UNPACK_RAW_1_P (D, X, (val)); \
253 _FP_UNPACK_SEMIRAW (D, 1, X); \
257 # define FP_PACK_D(val, X) \
260 _FP_PACK_CANONICAL (D, 1, X); \
261 _FP_PACK_RAW_1 (D, (val), X); \
265 # define FP_PACK_DP(val, X) \
268 _FP_PACK_CANONICAL (D, 1, X); \
269 if (!FP_INHIBIT_RESULTS) \
270 _FP_PACK_RAW_1_P (D, (val), X); \
274 # define FP_PACK_SEMIRAW_D(val, X) \
277 _FP_PACK_SEMIRAW (D, 1, X); \
278 _FP_PACK_RAW_1 (D, (val), X); \
282 # define FP_PACK_SEMIRAW_DP(val, X) \
285 _FP_PACK_SEMIRAW (D, 1, X); \
286 if (!FP_INHIBIT_RESULTS) \
287 _FP_PACK_RAW_1_P (D, (val), X); \
291 # define FP_ISSIGNAN_D(X) _FP_ISSIGNAN (D, 1, X)
292 # define FP_NEG_D(R, X) _FP_NEG (D, 1, R, X)
293 # define FP_ADD_D(R, X, Y) _FP_ADD (D, 1, R, X, Y)
294 # define FP_SUB_D(R, X, Y) _FP_SUB (D, 1, R, X, Y)
295 # define FP_MUL_D(R, X, Y) _FP_MUL (D, 1, R, X, Y)
296 # define FP_DIV_D(R, X, Y) _FP_DIV (D, 1, R, X, Y)
297 # define FP_SQRT_D(R, X) _FP_SQRT (D, 1, R, X)
298 # define _FP_SQRT_MEAT_D(R, S, T, X, Q) _FP_SQRT_MEAT_1 (R, S, T, X, (Q))
299 # define FP_FMA_D(R, X, Y, Z) _FP_FMA (D, 1, 2, R, X, Y, Z)
301 /* The implementation of _FP_MUL_D and _FP_DIV_D should be chosen by
302 the target machine. */
304 # define FP_CMP_D(r, X, Y, un, ex) _FP_CMP (D, 1, (r), X, Y, (un), (ex))
305 # define FP_CMP_EQ_D(r, X, Y, ex) _FP_CMP_EQ (D, 1, (r), X, Y, (ex))
306 # define FP_CMP_UNORD_D(r, X, Y, ex) _FP_CMP_UNORD (D, 1, (r), X, Y, (ex))
308 # define FP_TO_INT_D(r, X, rsz, rsg) _FP_TO_INT (D, 1, (r), X, (rsz), (rsg))
309 # define FP_TO_INT_ROUND_D(r, X, rsz, rsg) \
310 _FP_TO_INT_ROUND (D, 1, (r), X, (rsz), (rsg))
311 # define FP_FROM_INT_D(X, r, rs, rt) _FP_FROM_INT (D, 1, X, (r), (rs), rt)
313 # define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_1 (X)
314 # define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_1 (X)
316 # define _FP_FRAC_HIGH_DW_D(X) _FP_FRAC_HIGH_2 (X)
318 #endif /* W_TYPE_SIZE < 64 */