1 /* Software floating-point emulation.
2 Definitions for IEEE Double 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).
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 {
77 #if __BYTE_ORDER == __BIG_ENDIAN
79 unsigned exp : _FP_EXPBITS_D;
80 unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
81 unsigned frac0 : _FP_W_TYPE_SIZE;
83 unsigned frac0 : _FP_W_TYPE_SIZE;
84 unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
85 unsigned exp : _FP_EXPBITS_D;
88 } bits __attribute__((packed));
91 #define FP_DECL_D(X) _FP_DECL(2,X)
92 #define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_2(D,X,val)
93 #define FP_UNPACK_RAW_DP(X,val) _FP_UNPACK_RAW_2_P(D,X,val)
94 #define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_2(D,val,X)
95 #define FP_PACK_RAW_DP(val,X) \
97 if (!FP_INHIBIT_RESULTS) \
98 _FP_PACK_RAW_2_P(D,val,X); \
101 #define FP_UNPACK_D(X,val) \
103 _FP_UNPACK_RAW_2(D,X,val); \
104 _FP_UNPACK_CANONICAL(D,2,X); \
107 #define FP_UNPACK_DP(X,val) \
109 _FP_UNPACK_RAW_2_P(D,X,val); \
110 _FP_UNPACK_CANONICAL(D,2,X); \
113 #define FP_UNPACK_SEMIRAW_D(X,val) \
115 _FP_UNPACK_RAW_2(D,X,val); \
116 _FP_UNPACK_SEMIRAW(D,2,X); \
119 #define FP_UNPACK_SEMIRAW_DP(X,val) \
121 _FP_UNPACK_RAW_2_P(D,X,val); \
122 _FP_UNPACK_SEMIRAW(D,2,X); \
125 #define FP_PACK_D(val,X) \
127 _FP_PACK_CANONICAL(D,2,X); \
128 _FP_PACK_RAW_2(D,val,X); \
131 #define FP_PACK_DP(val,X) \
133 _FP_PACK_CANONICAL(D,2,X); \
134 if (!FP_INHIBIT_RESULTS) \
135 _FP_PACK_RAW_2_P(D,val,X); \
138 #define FP_PACK_SEMIRAW_D(val,X) \
140 _FP_PACK_SEMIRAW(D,2,X); \
141 _FP_PACK_RAW_2(D,val,X); \
144 #define FP_PACK_SEMIRAW_DP(val,X) \
146 _FP_PACK_SEMIRAW(D,2,X); \
147 if (!FP_INHIBIT_RESULTS) \
148 _FP_PACK_RAW_2_P(D,val,X); \
151 #define FP_ISSIGNAN_D(X) _FP_ISSIGNAN(D,2,X)
152 #define FP_NEG_D(R,X) _FP_NEG(D,2,R,X)
153 #define FP_ADD_D(R,X,Y) _FP_ADD(D,2,R,X,Y)
154 #define FP_SUB_D(R,X,Y) _FP_SUB(D,2,R,X,Y)
155 #define FP_MUL_D(R,X,Y) _FP_MUL(D,2,R,X,Y)
156 #define FP_DIV_D(R,X,Y) _FP_DIV(D,2,R,X,Y)
157 #define FP_SQRT_D(R,X) _FP_SQRT(D,2,R,X)
158 #define _FP_SQRT_MEAT_D(R,S,T,X,Q) _FP_SQRT_MEAT_2(R,S,T,X,Q)
159 #define FP_FMA_D(R,X,Y,Z) _FP_FMA(D,2,4,R,X,Y,Z)
161 #define FP_CMP_D(r,X,Y,un) _FP_CMP(D,2,r,X,Y,un)
162 #define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,2,r,X,Y)
163 #define FP_CMP_UNORD_D(r,X,Y) _FP_CMP_UNORD(D,2,r,X,Y)
165 #define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,2,r,X,rsz,rsg)
166 #define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,2,X,r,rs,rt)
168 #define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_2(X)
169 #define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_2(X)
171 #define _FP_FRAC_HIGH_DW_D(X) _FP_FRAC_HIGH_4(X)
178 struct _FP_STRUCT_LAYOUT {
179 #if __BYTE_ORDER == __BIG_ENDIAN
181 unsigned exp : _FP_EXPBITS_D;
182 _FP_W_TYPE frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
184 _FP_W_TYPE frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
185 unsigned exp : _FP_EXPBITS_D;
188 } bits __attribute__((packed));
191 #define FP_DECL_D(X) _FP_DECL(1,X)
192 #define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_1(D,X,val)
193 #define FP_UNPACK_RAW_DP(X,val) _FP_UNPACK_RAW_1_P(D,X,val)
194 #define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_1(D,val,X)
195 #define FP_PACK_RAW_DP(val,X) \
197 if (!FP_INHIBIT_RESULTS) \
198 _FP_PACK_RAW_1_P(D,val,X); \
201 #define FP_UNPACK_D(X,val) \
203 _FP_UNPACK_RAW_1(D,X,val); \
204 _FP_UNPACK_CANONICAL(D,1,X); \
207 #define FP_UNPACK_DP(X,val) \
209 _FP_UNPACK_RAW_1_P(D,X,val); \
210 _FP_UNPACK_CANONICAL(D,1,X); \
213 #define FP_UNPACK_SEMIRAW_D(X,val) \
215 _FP_UNPACK_RAW_1(D,X,val); \
216 _FP_UNPACK_SEMIRAW(D,1,X); \
219 #define FP_UNPACK_SEMIRAW_DP(X,val) \
221 _FP_UNPACK_RAW_1_P(D,X,val); \
222 _FP_UNPACK_SEMIRAW(D,1,X); \
225 #define FP_PACK_D(val,X) \
227 _FP_PACK_CANONICAL(D,1,X); \
228 _FP_PACK_RAW_1(D,val,X); \
231 #define FP_PACK_DP(val,X) \
233 _FP_PACK_CANONICAL(D,1,X); \
234 if (!FP_INHIBIT_RESULTS) \
235 _FP_PACK_RAW_1_P(D,val,X); \
238 #define FP_PACK_SEMIRAW_D(val,X) \
240 _FP_PACK_SEMIRAW(D,1,X); \
241 _FP_PACK_RAW_1(D,val,X); \
244 #define FP_PACK_SEMIRAW_DP(val,X) \
246 _FP_PACK_SEMIRAW(D,1,X); \
247 if (!FP_INHIBIT_RESULTS) \
248 _FP_PACK_RAW_1_P(D,val,X); \
251 #define FP_ISSIGNAN_D(X) _FP_ISSIGNAN(D,1,X)
252 #define FP_NEG_D(R,X) _FP_NEG(D,1,R,X)
253 #define FP_ADD_D(R,X,Y) _FP_ADD(D,1,R,X,Y)
254 #define FP_SUB_D(R,X,Y) _FP_SUB(D,1,R,X,Y)
255 #define FP_MUL_D(R,X,Y) _FP_MUL(D,1,R,X,Y)
256 #define FP_DIV_D(R,X,Y) _FP_DIV(D,1,R,X,Y)
257 #define FP_SQRT_D(R,X) _FP_SQRT(D,1,R,X)
258 #define _FP_SQRT_MEAT_D(R,S,T,X,Q) _FP_SQRT_MEAT_1(R,S,T,X,Q)
259 #define FP_FMA_D(R,X,Y,Z) _FP_FMA(D,1,2,R,X,Y,Z)
261 /* The implementation of _FP_MUL_D and _FP_DIV_D should be chosen by
262 the target machine. */
264 #define FP_CMP_D(r,X,Y,un) _FP_CMP(D,1,r,X,Y,un)
265 #define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,1,r,X,Y)
266 #define FP_CMP_UNORD_D(r,X,Y) _FP_CMP_UNORD(D,1,r,X,Y)
268 #define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,1,r,X,rsz,rsg)
269 #define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,1,X,r,rs,rt)
271 #define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_1(X)
272 #define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_1(X)
274 #define _FP_FRAC_HIGH_DW_D(X) _FP_FRAC_HIGH_2(X)
276 #endif /* W_TYPE_SIZE < 64 */