1 /* Software floating-point emulation. Common o 1 /* Software floating-point emulation. Common operations.
2 Copyright (C) 1997,1998,1999 Free Software 2 Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.
3 This file is part of the GNU C Library. 3 This file is part of the GNU C Library.
4 Contributed by Richard Henderson (rth@cygnu 4 Contributed by Richard Henderson (rth@cygnus.com),
5 Jakub Jelinek (jj@ultra.linu 5 Jakub Jelinek (jj@ultra.linux.cz),
6 David S. Miller (davem@redha 6 David S. Miller (davem@redhat.com) and
7 Peter Maydell (pmaydell@chia 7 Peter Maydell (pmaydell@chiark.greenend.org.uk).
8 8
9 The GNU C Library is free software; you can 9 The GNU C Library is free software; you can redistribute it and/or
10 modify it under the terms of the GNU Librar 10 modify it under the terms of the GNU Library General Public License as
11 published by the Free Software Foundation; 11 published by the Free Software Foundation; either version 2 of the
12 License, or (at your option) any later vers 12 License, or (at your option) any later version.
13 13
14 The GNU C Library is distributed in the hop 14 The GNU C Library is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the 15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Library General Public License for more det 17 Library General Public License for more details.
18 18
19 You should have received a copy of the GNU 19 You should have received a copy of the GNU Library General Public
20 License along with the GNU C Library; see t 20 License along with the GNU C Library; see the file COPYING.LIB. If
21 not, write to the Free Software Foundation, 21 not, write to the Free Software Foundation, Inc.,
22 59 Temple Place - Suite 330, Boston, MA 021 22 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
23 23
24 #ifndef __MATH_EMU_OP_COMMON_H__ 24 #ifndef __MATH_EMU_OP_COMMON_H__
25 #define __MATH_EMU_OP_COMMON_H__ 25 #define __MATH_EMU_OP_COMMON_H__
26 26
27 #define _FP_DECL(wc, X) \ 27 #define _FP_DECL(wc, X) \
28 _FP_I_TYPE X##_c=0, X##_s=0, X##_e=0; \ 28 _FP_I_TYPE X##_c=0, X##_s=0, X##_e=0; \
29 _FP_FRAC_DECL_##wc(X) 29 _FP_FRAC_DECL_##wc(X)
30 30
31 /* 31 /*
32 * Finish truly unpacking a native fp value by 32 * Finish truly unpacking a native fp value by classifying the kind
33 * of fp value and normalizing both the expone 33 * of fp value and normalizing both the exponent and the fraction.
34 */ 34 */
35 35
36 #define _FP_UNPACK_CANONICAL(fs, wc, X) 36 #define _FP_UNPACK_CANONICAL(fs, wc, X) \
37 do { 37 do { \
38 switch (X##_e) 38 switch (X##_e) \
39 { 39 { \
40 default: 40 default: \
41 _FP_FRAC_HIGH_RAW_##fs(X) |= _FP_IMPLBIT_# 41 _FP_FRAC_HIGH_RAW_##fs(X) |= _FP_IMPLBIT_##fs; \
42 _FP_FRAC_SLL_##wc(X, _FP_WORKBITS); 42 _FP_FRAC_SLL_##wc(X, _FP_WORKBITS); \
43 X##_e -= _FP_EXPBIAS_##fs; 43 X##_e -= _FP_EXPBIAS_##fs; \
44 X##_c = FP_CLS_NORMAL; 44 X##_c = FP_CLS_NORMAL; \
45 break; 45 break; \
46 46 \
47 case 0: 47 case 0: \
48 if (_FP_FRAC_ZEROP_##wc(X)) 48 if (_FP_FRAC_ZEROP_##wc(X)) \
49 X##_c = FP_CLS_ZERO; 49 X##_c = FP_CLS_ZERO; \
50 else 50 else \
51 { 51 { \
52 /* a denormalized number */ 52 /* a denormalized number */ \
53 _FP_I_TYPE _shift; 53 _FP_I_TYPE _shift; \
54 _FP_FRAC_CLZ_##wc(_shift, X); 54 _FP_FRAC_CLZ_##wc(_shift, X); \
55 _shift -= _FP_FRACXBITS_##fs; 55 _shift -= _FP_FRACXBITS_##fs; \
56 _FP_FRAC_SLL_##wc(X, (_shift+_FP_WORKB 56 _FP_FRAC_SLL_##wc(X, (_shift+_FP_WORKBITS)); \
57 X##_e -= _FP_EXPBIAS_##fs - 1 + _shift 57 X##_e -= _FP_EXPBIAS_##fs - 1 + _shift; \
58 X##_c = FP_CLS_NORMAL; 58 X##_c = FP_CLS_NORMAL; \
59 FP_SET_EXCEPTION(FP_EX_DENORM); 59 FP_SET_EXCEPTION(FP_EX_DENORM); \
60 if (FP_DENORM_ZERO) 60 if (FP_DENORM_ZERO) \
61 { 61 { \
62 FP_SET_EXCEPTION(FP_EX_INEXACT); 62 FP_SET_EXCEPTION(FP_EX_INEXACT); \
63 X##_c = FP_CLS_ZERO; 63 X##_c = FP_CLS_ZERO; \
64 } 64 } \
65 } 65 } \
66 break; 66 break; \
67 67 \
68 case _FP_EXPMAX_##fs: 68 case _FP_EXPMAX_##fs: \
69 if (_FP_FRAC_ZEROP_##wc(X)) 69 if (_FP_FRAC_ZEROP_##wc(X)) \
70 X##_c = FP_CLS_INF; 70 X##_c = FP_CLS_INF; \
71 else 71 else \
72 { 72 { \
73 X##_c = FP_CLS_NAN; 73 X##_c = FP_CLS_NAN; \
74 /* Check for signaling NaN */ 74 /* Check for signaling NaN */ \
75 if (!(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_ 75 if (!(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)) \
76 FP_SET_EXCEPTION(FP_EX_INVALID | FP_ 76 FP_SET_EXCEPTION(FP_EX_INVALID | FP_EX_INVALID_SNAN); \
77 } 77 } \
78 break; 78 break; \
79 } 79 } \
80 } while (0) 80 } while (0)
81 81
82 /* 82 /*
83 * Before packing the bits back into the nativ 83 * Before packing the bits back into the native fp result, take care
84 * of such mundane things as rounding and over 84 * of such mundane things as rounding and overflow. Also, for some
85 * kinds of fp values, the original parts may 85 * kinds of fp values, the original parts may not have been fully
86 * extracted -- but that is ok, we can regener 86 * extracted -- but that is ok, we can regenerate them now.
87 */ 87 */
88 88
89 #define _FP_PACK_CANONICAL(fs, wc, X) 89 #define _FP_PACK_CANONICAL(fs, wc, X) \
90 do { 90 do { \
91 switch (X##_c) 91 switch (X##_c) \
92 { 92 { \
93 case FP_CLS_NORMAL: 93 case FP_CLS_NORMAL: \
94 X##_e += _FP_EXPBIAS_##fs; 94 X##_e += _FP_EXPBIAS_##fs; \
95 if (X##_e > 0) 95 if (X##_e > 0) \
96 { 96 { \
97 _FP_ROUND(wc, X); 97 _FP_ROUND(wc, X); \
98 if (_FP_FRAC_OVERP_##wc(fs, X)) 98 if (_FP_FRAC_OVERP_##wc(fs, X)) \
99 { 99 { \
100 _FP_FRAC_CLEAR_OVERP_##wc(fs, X); 100 _FP_FRAC_CLEAR_OVERP_##wc(fs, X); \
101 X##_e++; 101 X##_e++; \
102 } 102 } \
103 _FP_FRAC_SRL_##wc(X, _FP_WORKBITS); 103 _FP_FRAC_SRL_##wc(X, _FP_WORKBITS); \
104 if (X##_e >= _FP_EXPMAX_##fs) 104 if (X##_e >= _FP_EXPMAX_##fs) \
105 { 105 { \
106 /* overflow */ 106 /* overflow */ \
107 switch (FP_ROUNDMODE) 107 switch (FP_ROUNDMODE) \
108 { 108 { \
109 case FP_RND_NEAREST: 109 case FP_RND_NEAREST: \
110 X##_c = FP_CLS_INF; 110 X##_c = FP_CLS_INF; \
111 break; 111 break; \
112 case FP_RND_PINF: 112 case FP_RND_PINF: \
113 if (!X##_s) X##_c = FP_CLS_INF 113 if (!X##_s) X##_c = FP_CLS_INF; \
114 break; 114 break; \
115 case FP_RND_MINF: 115 case FP_RND_MINF: \
116 if (X##_s) X##_c = FP_CLS_INF; 116 if (X##_s) X##_c = FP_CLS_INF; \
117 break; 117 break; \
118 } 118 } \
119 if (X##_c == FP_CLS_INF) 119 if (X##_c == FP_CLS_INF) \
120 { 120 { \
121 /* Overflow to infinity */ 121 /* Overflow to infinity */ \
122 X##_e = _FP_EXPMAX_##fs; 122 X##_e = _FP_EXPMAX_##fs; \
123 _FP_FRAC_SET_##wc(X, _FP_ZEROF 123 _FP_FRAC_SET_##wc(X, _FP_ZEROFRAC_##wc); \
124 } 124 } \
125 else 125 else \
126 { 126 { \
127 /* Overflow to maximum normal 127 /* Overflow to maximum normal */ \
128 X##_e = _FP_EXPMAX_##fs - 1; 128 X##_e = _FP_EXPMAX_##fs - 1; \
129 _FP_FRAC_SET_##wc(X, _FP_MAXFR 129 _FP_FRAC_SET_##wc(X, _FP_MAXFRAC_##wc); \
130 } 130 } \
131 FP_SET_EXCEPTION(FP_EX_OVERFLOW); 131 FP_SET_EXCEPTION(FP_EX_OVERFLOW); \
132 FP_SET_EXCEPTION(FP_EX_INEXACT); 132 FP_SET_EXCEPTION(FP_EX_INEXACT); \
133 } 133 } \
134 } 134 } \
135 else 135 else \
136 { 136 { \
137 /* we've got a denormalized number */ 137 /* we've got a denormalized number */ \
138 X##_e = -X##_e + 1; 138 X##_e = -X##_e + 1; \
139 if (X##_e <= _FP_WFRACBITS_##fs) 139 if (X##_e <= _FP_WFRACBITS_##fs) \
140 { 140 { \
141 _FP_FRAC_SRS_##wc(X, X##_e, _FP_WF 141 _FP_FRAC_SRS_##wc(X, X##_e, _FP_WFRACBITS_##fs); \
142 if (_FP_FRAC_HIGH_##fs(X) 142 if (_FP_FRAC_HIGH_##fs(X) \
143 & (_FP_OVERFLOW_##fs >> 1)) 143 & (_FP_OVERFLOW_##fs >> 1)) \
144 { 144 { \
145 X##_e = 1; 145 X##_e = 1; \
146 _FP_FRAC_SET_##wc(X, _FP_ZEROF 146 _FP_FRAC_SET_##wc(X, _FP_ZEROFRAC_##wc); \
147 } 147 } \
148 else 148 else \
149 { 149 { \
150 _FP_ROUND(wc, X); 150 _FP_ROUND(wc, X); \
151 if (_FP_FRAC_HIGH_##fs(X) 151 if (_FP_FRAC_HIGH_##fs(X) \
152 & (_FP_OVERFLOW_##fs >> 1)) 152 & (_FP_OVERFLOW_##fs >> 1)) \
153 { 153 { \
154 X##_e = 1; 154 X##_e = 1; \
155 _FP_FRAC_SET_##wc(X, _FP_Z 155 _FP_FRAC_SET_##wc(X, _FP_ZEROFRAC_##wc); \
156 FP_SET_EXCEPTION(FP_EX_INE 156 FP_SET_EXCEPTION(FP_EX_INEXACT); \
157 } 157 } \
158 else 158 else \
159 { 159 { \
160 X##_e = 0; 160 X##_e = 0; \
161 _FP_FRAC_SRL_##wc(X, _FP_W 161 _FP_FRAC_SRL_##wc(X, _FP_WORKBITS); \
162 } 162 } \
163 } 163 } \
164 if ((FP_CUR_EXCEPTIONS & FP_EX_INE 164 if ((FP_CUR_EXCEPTIONS & FP_EX_INEXACT) || \
165 (FP_TRAPPING_EXCEPTIONS & FP_E 165 (FP_TRAPPING_EXCEPTIONS & FP_EX_UNDERFLOW)) \
166 FP_SET_EXCEPTION(FP_EX_UNDERFL 166 FP_SET_EXCEPTION(FP_EX_UNDERFLOW); \
167 } 167 } \
168 else 168 else \
169 { 169 { \
170 /* underflow to zero */ 170 /* underflow to zero */ \
171 X##_e = 0; 171 X##_e = 0; \
172 if (!_FP_FRAC_ZEROP_##wc(X)) 172 if (!_FP_FRAC_ZEROP_##wc(X)) \
173 { 173 { \
174 _FP_FRAC_SET_##wc(X, _FP_MINFR 174 _FP_FRAC_SET_##wc(X, _FP_MINFRAC_##wc); \
175 _FP_ROUND(wc, X); 175 _FP_ROUND(wc, X); \
176 _FP_FRAC_LOW_##wc(X) >>= (_FP_ 176 _FP_FRAC_LOW_##wc(X) >>= (_FP_WORKBITS); \
177 } 177 } \
178 FP_SET_EXCEPTION(FP_EX_UNDERFLOW); 178 FP_SET_EXCEPTION(FP_EX_UNDERFLOW); \
179 } 179 } \
180 } 180 } \
181 break; 181 break; \
182 182 \
183 case FP_CLS_ZERO: 183 case FP_CLS_ZERO: \
184 X##_e = 0; 184 X##_e = 0; \
185 _FP_FRAC_SET_##wc(X, _FP_ZEROFRAC_##wc); 185 _FP_FRAC_SET_##wc(X, _FP_ZEROFRAC_##wc); \
186 break; 186 break; \
187 187 \
188 case FP_CLS_INF: 188 case FP_CLS_INF: \
189 X##_e = _FP_EXPMAX_##fs; 189 X##_e = _FP_EXPMAX_##fs; \
190 _FP_FRAC_SET_##wc(X, _FP_ZEROFRAC_##wc); 190 _FP_FRAC_SET_##wc(X, _FP_ZEROFRAC_##wc); \
191 break; 191 break; \
192 192 \
193 case FP_CLS_NAN: 193 case FP_CLS_NAN: \
194 X##_e = _FP_EXPMAX_##fs; 194 X##_e = _FP_EXPMAX_##fs; \
195 if (!_FP_KEEPNANFRACP) 195 if (!_FP_KEEPNANFRACP) \
196 { 196 { \
197 _FP_FRAC_SET_##wc(X, _FP_NANFRAC_##fs) 197 _FP_FRAC_SET_##wc(X, _FP_NANFRAC_##fs); \
198 X##_s = _FP_NANSIGN_##fs; 198 X##_s = _FP_NANSIGN_##fs; \
199 } 199 } \
200 else 200 else \
201 _FP_FRAC_HIGH_RAW_##fs(X) |= _FP_QNANBIT 201 _FP_FRAC_HIGH_RAW_##fs(X) |= _FP_QNANBIT_##fs; \
202 break; 202 break; \
203 } 203 } \
204 } while (0) 204 } while (0)
205 205
206 /* This one accepts raw argument and not cooke 206 /* This one accepts raw argument and not cooked, returns
207 * 1 if X is a signaling NaN. 207 * 1 if X is a signaling NaN.
208 */ 208 */
209 #define _FP_ISSIGNAN(fs, wc, X) 209 #define _FP_ISSIGNAN(fs, wc, X) \
210 ({ 210 ({ \
211 int __ret = 0; 211 int __ret = 0; \
212 if (X##_e == _FP_EXPMAX_##fs) 212 if (X##_e == _FP_EXPMAX_##fs) \
213 { 213 { \
214 if (!_FP_FRAC_ZEROP_##wc(X) 214 if (!_FP_FRAC_ZEROP_##wc(X) \
215 && !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP 215 && !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)) \
216 __ret = 1; 216 __ret = 1; \
217 } 217 } \
218 __ret; 218 __ret; \
219 }) 219 })
220 220
221 221
222 222
223 223
224 224
225 /* 225 /*
226 * Main addition routine. The input values sh 226 * Main addition routine. The input values should be cooked.
227 */ 227 */
228 228
229 #define _FP_ADD_INTERNAL(fs, wc, R, X, Y, OP) 229 #define _FP_ADD_INTERNAL(fs, wc, R, X, Y, OP) \
230 do { 230 do { \
231 switch (_FP_CLS_COMBINE(X##_c, Y##_c)) 231 switch (_FP_CLS_COMBINE(X##_c, Y##_c)) \
232 { 232 { \
233 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_NO 233 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_NORMAL): \
234 { 234 { \
235 /* shift the smaller number so that its 235 /* shift the smaller number so that its exponent matches the larger */ \
236 _FP_I_TYPE diff = X##_e - Y##_e; 236 _FP_I_TYPE diff = X##_e - Y##_e; \
237 237 \
238 if (diff < 0) 238 if (diff < 0) \
239 { 239 { \
240 diff = -diff; 240 diff = -diff; \
241 if (diff <= _FP_WFRACBITS_##fs) 241 if (diff <= _FP_WFRACBITS_##fs) \
242 _FP_FRAC_SRS_##wc(X, diff, _FP_WFR 242 _FP_FRAC_SRS_##wc(X, diff, _FP_WFRACBITS_##fs); \
243 else if (!_FP_FRAC_ZEROP_##wc(X)) 243 else if (!_FP_FRAC_ZEROP_##wc(X)) \
244 _FP_FRAC_SET_##wc(X, _FP_MINFRAC_# 244 _FP_FRAC_SET_##wc(X, _FP_MINFRAC_##wc); \
245 R##_e = Y##_e; 245 R##_e = Y##_e; \
246 } 246 } \
247 else 247 else \
248 { 248 { \
249 if (diff > 0) 249 if (diff > 0) \
250 { 250 { \
251 if (diff <= _FP_WFRACBITS_##fs) 251 if (diff <= _FP_WFRACBITS_##fs) \
252 _FP_FRAC_SRS_##wc(Y, diff, _FP 252 _FP_FRAC_SRS_##wc(Y, diff, _FP_WFRACBITS_##fs); \
253 else if (!_FP_FRAC_ZEROP_##wc(Y) 253 else if (!_FP_FRAC_ZEROP_##wc(Y)) \
254 _FP_FRAC_SET_##wc(Y, _FP_MINFR 254 _FP_FRAC_SET_##wc(Y, _FP_MINFRAC_##wc); \
255 } 255 } \
256 R##_e = X##_e; 256 R##_e = X##_e; \
257 } 257 } \
258 258 \
259 R##_c = FP_CLS_NORMAL; 259 R##_c = FP_CLS_NORMAL; \
260 260 \
261 if (X##_s == Y##_s) 261 if (X##_s == Y##_s) \
262 { 262 { \
263 R##_s = X##_s; 263 R##_s = X##_s; \
264 _FP_FRAC_ADD_##wc(R, X, Y); 264 _FP_FRAC_ADD_##wc(R, X, Y); \
265 if (_FP_FRAC_OVERP_##wc(fs, R)) 265 if (_FP_FRAC_OVERP_##wc(fs, R)) \
266 { 266 { \
267 _FP_FRAC_SRS_##wc(R, 1, _FP_WFRA 267 _FP_FRAC_SRS_##wc(R, 1, _FP_WFRACBITS_##fs); \
268 R##_e++; 268 R##_e++; \
269 } 269 } \
270 } 270 } \
271 else 271 else \
272 { 272 { \
273 R##_s = X##_s; 273 R##_s = X##_s; \
274 _FP_FRAC_SUB_##wc(R, X, Y); 274 _FP_FRAC_SUB_##wc(R, X, Y); \
275 if (_FP_FRAC_ZEROP_##wc(R)) 275 if (_FP_FRAC_ZEROP_##wc(R)) \
276 { 276 { \
277 /* return an exact zero */ 277 /* return an exact zero */ \
278 if (FP_ROUNDMODE == FP_RND_MINF) 278 if (FP_ROUNDMODE == FP_RND_MINF) \
279 R##_s |= Y##_s; 279 R##_s |= Y##_s; \
280 else 280 else \
281 R##_s &= Y##_s; 281 R##_s &= Y##_s; \
282 R##_c = FP_CLS_ZERO; 282 R##_c = FP_CLS_ZERO; \
283 } 283 } \
284 else 284 else \
285 { 285 { \
286 if (_FP_FRAC_NEGP_##wc(R)) 286 if (_FP_FRAC_NEGP_##wc(R)) \
287 { 287 { \
288 _FP_FRAC_SUB_##wc(R, Y, X); 288 _FP_FRAC_SUB_##wc(R, Y, X); \
289 R##_s = Y##_s; 289 R##_s = Y##_s; \
290 } 290 } \
291 291 \
292 /* renormalize after subtraction 292 /* renormalize after subtraction */ \
293 _FP_FRAC_CLZ_##wc(diff, R); 293 _FP_FRAC_CLZ_##wc(diff, R); \
294 diff -= _FP_WFRACXBITS_##fs; 294 diff -= _FP_WFRACXBITS_##fs; \
295 if (diff) 295 if (diff) \
296 { 296 { \
297 R##_e -= diff; 297 R##_e -= diff; \
298 _FP_FRAC_SLL_##wc(R, diff); 298 _FP_FRAC_SLL_##wc(R, diff); \
299 } 299 } \
300 } 300 } \
301 } 301 } \
302 break; 302 break; \
303 } 303 } \
304 304 \
305 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_NAN): 305 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_NAN): \
306 _FP_CHOOSENAN(fs, wc, R, X, Y, OP); 306 _FP_CHOOSENAN(fs, wc, R, X, Y, OP); \
307 break; 307 break; \
308 308 \
309 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_ZE 309 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_ZERO): \
310 R##_e = X##_e; 310 R##_e = X##_e; \
311 fallthrough; <<
312 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_NORMA 311 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_NORMAL): \
313 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_INF): 312 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_INF): \
314 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_ZERO) 313 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_ZERO): \
315 _FP_FRAC_COPY_##wc(R, X); 314 _FP_FRAC_COPY_##wc(R, X); \
316 R##_s = X##_s; 315 R##_s = X##_s; \
317 R##_c = X##_c; 316 R##_c = X##_c; \
318 break; 317 break; \
319 318 \
320 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_NORM 319 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_NORMAL): \
321 R##_e = Y##_e; 320 R##_e = Y##_e; \
322 fallthrough; <<
323 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_NA 321 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_NAN): \
324 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NAN): 322 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NAN): \
325 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_NAN) 323 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_NAN): \
326 _FP_FRAC_COPY_##wc(R, Y); 324 _FP_FRAC_COPY_##wc(R, Y); \
327 R##_s = Y##_s; 325 R##_s = Y##_s; \
328 R##_c = Y##_c; 326 R##_c = Y##_c; \
329 break; 327 break; \
330 328 \
331 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_INF): 329 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_INF): \
332 if (X##_s != Y##_s) 330 if (X##_s != Y##_s) \
333 { 331 { \
334 /* +INF + -INF => NAN */ 332 /* +INF + -INF => NAN */ \
335 _FP_FRAC_SET_##wc(R, _FP_NANFRAC_##fs) 333 _FP_FRAC_SET_##wc(R, _FP_NANFRAC_##fs); \
336 R##_s = _FP_NANSIGN_##fs; 334 R##_s = _FP_NANSIGN_##fs; \
337 R##_c = FP_CLS_NAN; 335 R##_c = FP_CLS_NAN; \
338 FP_SET_EXCEPTION(FP_EX_INVALID | FP_EX 336 FP_SET_EXCEPTION(FP_EX_INVALID | FP_EX_INVALID_ISI); \
339 break; 337 break; \
340 } 338 } \
341 fallthrough; !! 339 /* FALLTHRU */ \
342 340 \
343 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NORMA 341 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NORMAL): \
344 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_ZERO) 342 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_ZERO): \
345 R##_s = X##_s; 343 R##_s = X##_s; \
346 R##_c = FP_CLS_INF; 344 R##_c = FP_CLS_INF; \
347 break; 345 break; \
348 346 \
349 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_IN 347 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_INF): \
350 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_INF) 348 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_INF): \
351 R##_s = Y##_s; 349 R##_s = Y##_s; \
352 R##_c = FP_CLS_INF; 350 R##_c = FP_CLS_INF; \
353 break; 351 break; \
354 352 \
355 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_ZERO 353 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_ZERO): \
356 /* make sure the sign is correct */ 354 /* make sure the sign is correct */ \
357 if (FP_ROUNDMODE == FP_RND_MINF) 355 if (FP_ROUNDMODE == FP_RND_MINF) \
358 R##_s = X##_s | Y##_s; 356 R##_s = X##_s | Y##_s; \
359 else 357 else \
360 R##_s = X##_s & Y##_s; 358 R##_s = X##_s & Y##_s; \
361 R##_c = FP_CLS_ZERO; 359 R##_c = FP_CLS_ZERO; \
362 break; 360 break; \
363 361 \
364 default: 362 default: \
365 abort(); 363 abort(); \
366 } 364 } \
367 } while (0) 365 } while (0)
368 366
369 #define _FP_ADD(fs, wc, R, X, Y) _FP_ADD_INTER 367 #define _FP_ADD(fs, wc, R, X, Y) _FP_ADD_INTERNAL(fs, wc, R, X, Y, '+')
370 #define _FP_SUB(fs, wc, R, X, Y) 368 #define _FP_SUB(fs, wc, R, X, Y) \
371 do { 369 do { \
372 if (Y##_c != FP_CLS_NAN) Y##_s ^= 1; 370 if (Y##_c != FP_CLS_NAN) Y##_s ^= 1; \
373 _FP_ADD_INTERNAL(fs, wc, R, X, Y, '-'); 371 _FP_ADD_INTERNAL(fs, wc, R, X, Y, '-'); \
374 } while (0) 372 } while (0)
375 373
376 374
377 /* 375 /*
378 * Main negation routine. FIXME -- when we ca 376 * Main negation routine. FIXME -- when we care about setting exception
379 * bits reliably, this will not do. We should 377 * bits reliably, this will not do. We should examine all of the fp classes.
380 */ 378 */
381 379
382 #define _FP_NEG(fs, wc, R, X) \ 380 #define _FP_NEG(fs, wc, R, X) \
383 do { \ 381 do { \
384 _FP_FRAC_COPY_##wc(R, X); \ 382 _FP_FRAC_COPY_##wc(R, X); \
385 R##_c = X##_c; \ 383 R##_c = X##_c; \
386 R##_e = X##_e; \ 384 R##_e = X##_e; \
387 R##_s = 1 ^ X##_s; \ 385 R##_s = 1 ^ X##_s; \
388 } while (0) 386 } while (0)
389 387
390 388
391 /* 389 /*
392 * Main multiplication routine. The input val 390 * Main multiplication routine. The input values should be cooked.
393 */ 391 */
394 392
395 #define _FP_MUL(fs, wc, R, X, Y) 393 #define _FP_MUL(fs, wc, R, X, Y) \
396 do { 394 do { \
397 R##_s = X##_s ^ Y##_s; 395 R##_s = X##_s ^ Y##_s; \
398 switch (_FP_CLS_COMBINE(X##_c, Y##_c)) 396 switch (_FP_CLS_COMBINE(X##_c, Y##_c)) \
399 { 397 { \
400 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_NO 398 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_NORMAL): \
401 R##_c = FP_CLS_NORMAL; 399 R##_c = FP_CLS_NORMAL; \
402 R##_e = X##_e + Y##_e + 1; 400 R##_e = X##_e + Y##_e + 1; \
403 401 \
404 _FP_MUL_MEAT_##fs(R,X,Y); 402 _FP_MUL_MEAT_##fs(R,X,Y); \
405 403 \
406 if (_FP_FRAC_OVERP_##wc(fs, R)) 404 if (_FP_FRAC_OVERP_##wc(fs, R)) \
407 _FP_FRAC_SRS_##wc(R, 1, _FP_WFRACBITS_## 405 _FP_FRAC_SRS_##wc(R, 1, _FP_WFRACBITS_##fs); \
408 else 406 else \
409 R##_e--; 407 R##_e--; \
410 break; 408 break; \
411 409 \
412 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_NAN): 410 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_NAN): \
413 _FP_CHOOSENAN(fs, wc, R, X, Y, '*'); 411 _FP_CHOOSENAN(fs, wc, R, X, Y, '*'); \
414 break; 412 break; \
415 413 \
416 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_NORMA 414 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_NORMAL): \
417 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_INF): 415 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_INF): \
418 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_ZERO) 416 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_ZERO): \
419 R##_s = X##_s; 417 R##_s = X##_s; \
420 fallthrough; <<
421 418 \
422 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_INF): 419 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_INF): \
423 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NORMA 420 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NORMAL): \
424 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_NORM 421 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_NORMAL): \
425 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_ZERO 422 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_ZERO): \
426 _FP_FRAC_COPY_##wc(R, X); 423 _FP_FRAC_COPY_##wc(R, X); \
427 R##_c = X##_c; 424 R##_c = X##_c; \
428 break; 425 break; \
429 426 \
430 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_NA 427 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_NAN): \
431 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NAN): 428 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NAN): \
432 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_NAN) 429 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_NAN): \
433 R##_s = Y##_s; 430 R##_s = Y##_s; \
434 fallthrough; <<
435 431 \
436 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_IN 432 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_INF): \
437 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_ZE 433 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_ZERO): \
438 _FP_FRAC_COPY_##wc(R, Y); 434 _FP_FRAC_COPY_##wc(R, Y); \
439 R##_c = Y##_c; 435 R##_c = Y##_c; \
440 break; 436 break; \
441 437 \
442 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_ZERO) 438 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_ZERO): \
443 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_INF) 439 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_INF): \
444 R##_s = _FP_NANSIGN_##fs; 440 R##_s = _FP_NANSIGN_##fs; \
445 R##_c = FP_CLS_NAN; 441 R##_c = FP_CLS_NAN; \
446 _FP_FRAC_SET_##wc(R, _FP_NANFRAC_##fs); 442 _FP_FRAC_SET_##wc(R, _FP_NANFRAC_##fs); \
447 FP_SET_EXCEPTION(FP_EX_INVALID | FP_EX_INV 443 FP_SET_EXCEPTION(FP_EX_INVALID | FP_EX_INVALID_IMZ);\
448 break; 444 break; \
449 445 \
450 default: 446 default: \
451 abort(); 447 abort(); \
452 } 448 } \
453 } while (0) 449 } while (0)
454 450
455 451
456 /* 452 /*
457 * Main division routine. The input values sh 453 * Main division routine. The input values should be cooked.
458 */ 454 */
459 455
460 #define _FP_DIV(fs, wc, R, X, Y) 456 #define _FP_DIV(fs, wc, R, X, Y) \
461 do { 457 do { \
462 R##_s = X##_s ^ Y##_s; 458 R##_s = X##_s ^ Y##_s; \
463 switch (_FP_CLS_COMBINE(X##_c, Y##_c)) 459 switch (_FP_CLS_COMBINE(X##_c, Y##_c)) \
464 { 460 { \
465 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_NO 461 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_NORMAL): \
466 R##_c = FP_CLS_NORMAL; 462 R##_c = FP_CLS_NORMAL; \
467 R##_e = X##_e - Y##_e; 463 R##_e = X##_e - Y##_e; \
468 464 \
469 _FP_DIV_MEAT_##fs(R,X,Y); 465 _FP_DIV_MEAT_##fs(R,X,Y); \
470 break; 466 break; \
471 467 \
472 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_NAN): 468 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_NAN): \
473 _FP_CHOOSENAN(fs, wc, R, X, Y, '/'); 469 _FP_CHOOSENAN(fs, wc, R, X, Y, '/'); \
474 break; 470 break; \
475 471 \
476 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_NORMA 472 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_NORMAL): \
477 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_INF): 473 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_INF): \
478 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_ZERO) 474 case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_ZERO): \
479 R##_s = X##_s; 475 R##_s = X##_s; \
480 _FP_FRAC_COPY_##wc(R, X); 476 _FP_FRAC_COPY_##wc(R, X); \
481 R##_c = X##_c; 477 R##_c = X##_c; \
482 break; 478 break; \
483 479 \
484 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_NA 480 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_NAN): \
485 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NAN): 481 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NAN): \
486 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_NAN) 482 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_NAN): \
487 R##_s = Y##_s; 483 R##_s = Y##_s; \
488 _FP_FRAC_COPY_##wc(R, Y); 484 _FP_FRAC_COPY_##wc(R, Y); \
489 R##_c = Y##_c; 485 R##_c = Y##_c; \
490 break; 486 break; \
491 487 \
492 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_IN 488 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_INF): \
493 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_INF) 489 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_INF): \
494 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_NORM 490 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_NORMAL): \
495 R##_c = FP_CLS_ZERO; 491 R##_c = FP_CLS_ZERO; \
496 break; 492 break; \
497 493 \
498 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_ZE 494 case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_ZERO): \
499 FP_SET_EXCEPTION(FP_EX_DIVZERO); 495 FP_SET_EXCEPTION(FP_EX_DIVZERO); \
500 fallthrough; <<
501 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_ZERO) 496 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_ZERO): \
502 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NORMA 497 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NORMAL): \
503 R##_c = FP_CLS_INF; 498 R##_c = FP_CLS_INF; \
504 break; 499 break; \
505 500 \
506 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_INF): 501 case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_INF): \
507 R##_s = _FP_NANSIGN_##fs; 502 R##_s = _FP_NANSIGN_##fs; \
508 R##_c = FP_CLS_NAN; 503 R##_c = FP_CLS_NAN; \
509 _FP_FRAC_SET_##wc(R, _FP_NANFRAC_##fs); 504 _FP_FRAC_SET_##wc(R, _FP_NANFRAC_##fs); \
510 FP_SET_EXCEPTION(FP_EX_INVALID | FP_EX_INV 505 FP_SET_EXCEPTION(FP_EX_INVALID | FP_EX_INVALID_IDI);\
511 break; 506 break; \
512 507 \
513 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_ZERO 508 case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_ZERO): \
514 R##_s = _FP_NANSIGN_##fs; 509 R##_s = _FP_NANSIGN_##fs; \
515 R##_c = FP_CLS_NAN; 510 R##_c = FP_CLS_NAN; \
516 _FP_FRAC_SET_##wc(R, _FP_NANFRAC_##fs); 511 _FP_FRAC_SET_##wc(R, _FP_NANFRAC_##fs); \
517 FP_SET_EXCEPTION(FP_EX_INVALID | FP_EX_INV 512 FP_SET_EXCEPTION(FP_EX_INVALID | FP_EX_INVALID_ZDZ);\
518 break; 513 break; \
519 514 \
520 default: 515 default: \
521 abort(); 516 abort(); \
522 } 517 } \
523 } while (0) 518 } while (0)
524 519
525 520
526 /* 521 /*
527 * Main differential comparison routine. The 522 * Main differential comparison routine. The inputs should be raw not
528 * cooked. The return is -1,0,1 for normal va 523 * cooked. The return is -1,0,1 for normal values, 2 otherwise.
529 */ 524 */
530 525
531 #define _FP_CMP(fs, wc, ret, X, Y, un) 526 #define _FP_CMP(fs, wc, ret, X, Y, un) \
532 do { 527 do { \
533 /* NANs are unordered */ 528 /* NANs are unordered */ \
534 if ((X##_e == _FP_EXPMAX_##fs && !_FP_FRAC 529 if ((X##_e == _FP_EXPMAX_##fs && !_FP_FRAC_ZEROP_##wc(X)) \
535 || (Y##_e == _FP_EXPMAX_##fs && !_FP_F 530 || (Y##_e == _FP_EXPMAX_##fs && !_FP_FRAC_ZEROP_##wc(Y))) \
536 { 531 { \
537 ret = un; 532 ret = un; \
538 } 533 } \
539 else 534 else \
540 { 535 { \
541 int __is_zero_x; 536 int __is_zero_x; \
542 int __is_zero_y; 537 int __is_zero_y; \
543 538 \
544 __is_zero_x = (!X##_e && _FP_FRAC_ZERO 539 __is_zero_x = (!X##_e && _FP_FRAC_ZEROP_##wc(X)) ? 1 : 0; \
545 __is_zero_y = (!Y##_e && _FP_FRAC_ZERO 540 __is_zero_y = (!Y##_e && _FP_FRAC_ZEROP_##wc(Y)) ? 1 : 0; \
546 541 \
547 if (__is_zero_x && __is_zero_y) 542 if (__is_zero_x && __is_zero_y) \
548 ret = 0; 543 ret = 0; \
549 else if (__is_zero_x) 544 else if (__is_zero_x) \
550 ret = Y##_s ? 1 : -1; 545 ret = Y##_s ? 1 : -1; \
551 else if (__is_zero_y) 546 else if (__is_zero_y) \
552 ret = X##_s ? -1 : 1; 547 ret = X##_s ? -1 : 1; \
553 else if (X##_s != Y##_s) 548 else if (X##_s != Y##_s) \
554 ret = X##_s ? -1 : 1; 549 ret = X##_s ? -1 : 1; \
555 else if (X##_e > Y##_e) 550 else if (X##_e > Y##_e) \
556 ret = X##_s ? -1 : 1; 551 ret = X##_s ? -1 : 1; \
557 else if (X##_e < Y##_e) 552 else if (X##_e < Y##_e) \
558 ret = X##_s ? 1 : -1; 553 ret = X##_s ? 1 : -1; \
559 else if (_FP_FRAC_GT_##wc(X, Y)) 554 else if (_FP_FRAC_GT_##wc(X, Y)) \
560 ret = X##_s ? -1 : 1; 555 ret = X##_s ? -1 : 1; \
561 else if (_FP_FRAC_GT_##wc(Y, X)) 556 else if (_FP_FRAC_GT_##wc(Y, X)) \
562 ret = X##_s ? 1 : -1; 557 ret = X##_s ? 1 : -1; \
563 else 558 else \
564 ret = 0; 559 ret = 0; \
565 } 560 } \
566 } while (0) 561 } while (0)
567 562
568 563
569 /* Simplification for strict equality. */ 564 /* Simplification for strict equality. */
570 565
571 #define _FP_CMP_EQ(fs, wc, ret, X, Y) 566 #define _FP_CMP_EQ(fs, wc, ret, X, Y) \
572 do { 567 do { \
573 /* NANs are unordered */ 568 /* NANs are unordered */ \
574 if ((X##_e == _FP_EXPMAX_##fs && !_FP_FRAC 569 if ((X##_e == _FP_EXPMAX_##fs && !_FP_FRAC_ZEROP_##wc(X)) \
575 || (Y##_e == _FP_EXPMAX_##fs && !_FP_F 570 || (Y##_e == _FP_EXPMAX_##fs && !_FP_FRAC_ZEROP_##wc(Y))) \
576 { 571 { \
577 ret = 1; 572 ret = 1; \
578 } 573 } \
579 else 574 else \
580 { 575 { \
581 ret = !(X##_e == Y##_e 576 ret = !(X##_e == Y##_e \
582 && _FP_FRAC_EQ_##wc(X, Y) 577 && _FP_FRAC_EQ_##wc(X, Y) \
583 && (X##_s == Y##_s || !X##_e & 578 && (X##_s == Y##_s || !X##_e && _FP_FRAC_ZEROP_##wc(X))); \
584 } 579 } \
585 } while (0) 580 } while (0)
586 581
587 /* 582 /*
588 * Main square root routine. The input value 583 * Main square root routine. The input value should be cooked.
589 */ 584 */
590 585
591 #define _FP_SQRT(fs, wc, R, X) 586 #define _FP_SQRT(fs, wc, R, X) \
592 do { 587 do { \
593 _FP_FRAC_DECL_##wc(T); _FP_FRAC_DECL_##wc( 588 _FP_FRAC_DECL_##wc(T); _FP_FRAC_DECL_##wc(S); \
594 _FP_W_TYPE q; 589 _FP_W_TYPE q; \
595 switch (X##_c) 590 switch (X##_c) \
596 { 591 { \
597 case FP_CLS_NAN: 592 case FP_CLS_NAN: \
598 _FP_FRAC_COPY_##wc(R, X); 593 _FP_FRAC_COPY_##wc(R, X); \
599 R##_s = X##_s; 594 R##_s = X##_s; \
600 R##_c = FP_CLS_NAN; 595 R##_c = FP_CLS_NAN; \
601 break; 596 break; \
602 case FP_CLS_INF: 597 case FP_CLS_INF: \
603 if (X##_s) 598 if (X##_s) \
604 { 599 { \
605 R##_s = _FP_NANSIGN_##fs; 600 R##_s = _FP_NANSIGN_##fs; \
606 R##_c = FP_CLS_NAN; /* NAN */ 601 R##_c = FP_CLS_NAN; /* NAN */ \
607 _FP_FRAC_SET_##wc(R, _FP_NANFRAC_# 602 _FP_FRAC_SET_##wc(R, _FP_NANFRAC_##fs); \
608 FP_SET_EXCEPTION(FP_EX_INVALID); 603 FP_SET_EXCEPTION(FP_EX_INVALID); \
609 } 604 } \
610 else 605 else \
611 { 606 { \
612 R##_s = 0; 607 R##_s = 0; \
613 R##_c = FP_CLS_INF; /* sqrt(+inf) 608 R##_c = FP_CLS_INF; /* sqrt(+inf) = +inf */ \
614 } 609 } \
615 break; 610 break; \
616 case FP_CLS_ZERO: 611 case FP_CLS_ZERO: \
617 R##_s = X##_s; 612 R##_s = X##_s; \
618 R##_c = FP_CLS_ZERO; /* sqrt(+-0) = +- 613 R##_c = FP_CLS_ZERO; /* sqrt(+-0) = +-0 */ \
619 break; 614 break; \
620 case FP_CLS_NORMAL: 615 case FP_CLS_NORMAL: \
621 R##_s = 0; 616 R##_s = 0; \
622 if (X##_s) 617 if (X##_s) \
623 { 618 { \
624 R##_c = FP_CLS_NAN; /* sNAN */ 619 R##_c = FP_CLS_NAN; /* sNAN */ \
625 R##_s = _FP_NANSIGN_##fs; 620 R##_s = _FP_NANSIGN_##fs; \
626 _FP_FRAC_SET_##wc(R, _FP_NANFRAC_# 621 _FP_FRAC_SET_##wc(R, _FP_NANFRAC_##fs); \
627 FP_SET_EXCEPTION(FP_EX_INVALID); 622 FP_SET_EXCEPTION(FP_EX_INVALID); \
628 break; 623 break; \
629 } 624 } \
630 R##_c = FP_CLS_NORMAL; 625 R##_c = FP_CLS_NORMAL; \
631 if (X##_e & 1) 626 if (X##_e & 1) \
632 _FP_FRAC_SLL_##wc(X, 1); 627 _FP_FRAC_SLL_##wc(X, 1); \
633 R##_e = X##_e >> 1; 628 R##_e = X##_e >> 1; \
634 _FP_FRAC_SET_##wc(S, _FP_ZEROFRAC_##wc 629 _FP_FRAC_SET_##wc(S, _FP_ZEROFRAC_##wc); \
635 _FP_FRAC_SET_##wc(R, _FP_ZEROFRAC_##wc 630 _FP_FRAC_SET_##wc(R, _FP_ZEROFRAC_##wc); \
636 q = _FP_OVERFLOW_##fs >> 1; 631 q = _FP_OVERFLOW_##fs >> 1; \
637 _FP_SQRT_MEAT_##wc(R, S, T, X, q); 632 _FP_SQRT_MEAT_##wc(R, S, T, X, q); \
638 } 633 } \
639 } while (0) 634 } while (0)
640 635
641 /* 636 /*
642 * Convert from FP to integer 637 * Convert from FP to integer
643 */ 638 */
644 639
645 /* RSIGNED can have following values: 640 /* RSIGNED can have following values:
646 * 0: the number is required to be 0..(2^rsiz 641 * 0: the number is required to be 0..(2^rsize)-1, if not, NV is set plus
647 * the result is either 0 or (2^rsize)-1 d 642 * the result is either 0 or (2^rsize)-1 depending on the sign in such case.
648 * 1: the number is required to be -(2^(rsize 643 * 1: the number is required to be -(2^(rsize-1))..(2^(rsize-1))-1, if not, NV is
649 * set plus the result is either -(2^(rsiz 644 * set plus the result is either -(2^(rsize-1)) or (2^(rsize-1))-1 depending
650 * on the sign in such case. 645 * on the sign in such case.
651 * 2: the number is required to be -(2^(rsize 646 * 2: the number is required to be -(2^(rsize-1))..(2^(rsize-1))-1, if not, NV is
652 * set plus the result is truncated to fit 647 * set plus the result is truncated to fit into destination.
653 * -1: the number is required to be -(2^(rsize 648 * -1: the number is required to be -(2^(rsize-1))..(2^rsize)-1, if not, NV is
654 * set plus the result is either -(2^(rsiz 649 * set plus the result is either -(2^(rsize-1)) or (2^(rsize-1))-1 depending
655 * on the sign in such case. 650 * on the sign in such case.
656 */ 651 */
657 #define _FP_TO_INT(fs, wc, r, X, rsize, rsigne 652 #define _FP_TO_INT(fs, wc, r, X, rsize, rsigned) \
658 do { 653 do { \
659 switch (X##_c) 654 switch (X##_c) \
660 { 655 { \
661 case FP_CLS_NORMAL: 656 case FP_CLS_NORMAL: \
662 if (X##_e < 0) 657 if (X##_e < 0) \
663 { 658 { \
664 FP_SET_EXCEPTION(FP_EX_INEXACT); 659 FP_SET_EXCEPTION(FP_EX_INEXACT); \
665 fallthrough; <<
666 case FP_CLS_ZERO: 660 case FP_CLS_ZERO: \
667 r = 0; 661 r = 0; \
668 } 662 } \
669 else if (X##_e >= rsize - (rsigned > 0 663 else if (X##_e >= rsize - (rsigned > 0 || X##_s) \
670 || (!rsigned && X##_s)) 664 || (!rsigned && X##_s)) \
671 { /* overflow */ 665 { /* overflow */ \
672 fallthrough; <<
673 case FP_CLS_NAN: 666 case FP_CLS_NAN: \
674 case FP_CLS_INF: 667 case FP_CLS_INF: \
675 if (rsigned == 2) 668 if (rsigned == 2) \
676 { 669 { \
677 if (X##_c != FP_CLS_NORMAL 670 if (X##_c != FP_CLS_NORMAL \
678 || X##_e >= rsize - 1 + _F 671 || X##_e >= rsize - 1 + _FP_WFRACBITS_##fs) \
679 r = 0; 672 r = 0; \
680 else 673 else \
681 { 674 { \
682 _FP_FRAC_SLL_##wc(X, (X##_ 675 _FP_FRAC_SLL_##wc(X, (X##_e - _FP_WFRACBITS_##fs + 1)); \
683 _FP_FRAC_ASSEMBLE_##wc(r, 676 _FP_FRAC_ASSEMBLE_##wc(r, X, rsize); \
684 } 677 } \
685 } 678 } \
686 else if (rsigned) 679 else if (rsigned) \
687 { 680 { \
688 r = 1; 681 r = 1; \
689 r <<= rsize - 1; 682 r <<= rsize - 1; \
690 r -= 1 - X##_s; 683 r -= 1 - X##_s; \
691 } 684 } \
692 else 685 else \
693 { 686 { \
694 r = 0; 687 r = 0; \
695 if (!X##_s) !! 688 if (X##_s) \
696 r = ~r; 689 r = ~r; \
697 } 690 } \
698 FP_SET_EXCEPTION(FP_EX_INVALID); 691 FP_SET_EXCEPTION(FP_EX_INVALID); \
699 } 692 } \
700 else 693 else \
701 { 694 { \
702 if (_FP_W_TYPE_SIZE*wc < rsize) 695 if (_FP_W_TYPE_SIZE*wc < rsize) \
703 { 696 { \
704 _FP_FRAC_ASSEMBLE_##wc(r, X, r 697 _FP_FRAC_ASSEMBLE_##wc(r, X, rsize); \
705 r <<= X##_e - _FP_WFRACBITS_## 698 r <<= X##_e - _FP_WFRACBITS_##fs; \
706 } 699 } \
707 else 700 else \
708 { 701 { \
709 if (X##_e >= _FP_WFRACBITS_##f 702 if (X##_e >= _FP_WFRACBITS_##fs) \
710 _FP_FRAC_SLL_##wc(X, (X##_e 703 _FP_FRAC_SLL_##wc(X, (X##_e - _FP_WFRACBITS_##fs + 1)); \
711 else if (X##_e < _FP_WFRACBITS 704 else if (X##_e < _FP_WFRACBITS_##fs - 1) \
712 { 705 { \
713 _FP_FRAC_SRS_##wc(X, (_FP_ 706 _FP_FRAC_SRS_##wc(X, (_FP_WFRACBITS_##fs - X##_e - 2), \
714 _FP_WFRA 707 _FP_WFRACBITS_##fs); \
715 if (_FP_FRAC_LOW_##wc(X) & 708 if (_FP_FRAC_LOW_##wc(X) & 1) \
716 FP_SET_EXCEPTION(FP_EX_I 709 FP_SET_EXCEPTION(FP_EX_INEXACT); \
717 _FP_FRAC_SRL_##wc(X, 1); 710 _FP_FRAC_SRL_##wc(X, 1); \
718 } 711 } \
719 _FP_FRAC_ASSEMBLE_##wc(r, X, r 712 _FP_FRAC_ASSEMBLE_##wc(r, X, rsize); \
720 } 713 } \
721 if (rsigned && X##_s) 714 if (rsigned && X##_s) \
722 r = -r; 715 r = -r; \
723 } 716 } \
724 break; 717 break; \
725 } 718 } \
726 } while (0) 719 } while (0)
727 720
728 #define _FP_TO_INT_ROUND(fs, wc, r, X, rsize, 721 #define _FP_TO_INT_ROUND(fs, wc, r, X, rsize, rsigned) \
729 do { 722 do { \
730 r = 0; 723 r = 0; \
731 switch (X##_c) 724 switch (X##_c) \
732 { 725 { \
733 case FP_CLS_NORMAL: 726 case FP_CLS_NORMAL: \
734 if (X##_e >= _FP_FRACBITS_##fs - 1) 727 if (X##_e >= _FP_FRACBITS_##fs - 1) \
735 { 728 { \
736 if (X##_e < rsize - 1 + _FP_WFRACB 729 if (X##_e < rsize - 1 + _FP_WFRACBITS_##fs) \
737 { 730 { \
738 if (X##_e >= _FP_WFRACBITS_##f 731 if (X##_e >= _FP_WFRACBITS_##fs - 1) \
739 { 732 { \
740 _FP_FRAC_ASSEMBLE_##wc(r, 733 _FP_FRAC_ASSEMBLE_##wc(r, X, rsize); \
741 r <<= X##_e - _FP_WFRACBIT 734 r <<= X##_e - _FP_WFRACBITS_##fs + 1; \
742 } 735 } \
743 else 736 else \
744 { 737 { \
745 _FP_FRAC_SRL_##wc(X, _FP_W 738 _FP_FRAC_SRL_##wc(X, _FP_WORKBITS - X##_e \
746 + _FP_FR 739 + _FP_FRACBITS_##fs - 1); \
747 _FP_FRAC_ASSEMBLE_##wc(r, 740 _FP_FRAC_ASSEMBLE_##wc(r, X, rsize); \
748 } 741 } \
749 } 742 } \
750 } 743 } \
751 else 744 else \
752 { 745 { \
753 int _lz0, _lz1; <<
754 if (X##_e <= -_FP_WORKBITS - 1) 746 if (X##_e <= -_FP_WORKBITS - 1) \
755 _FP_FRAC_SET_##wc(X, _FP_MINFRAC 747 _FP_FRAC_SET_##wc(X, _FP_MINFRAC_##wc); \
756 else 748 else \
757 _FP_FRAC_SRS_##wc(X, _FP_FRACBIT 749 _FP_FRAC_SRS_##wc(X, _FP_FRACBITS_##fs - 1 - X##_e, \
758 _FP_WFRACBITS_ 750 _FP_WFRACBITS_##fs); \
759 _FP_FRAC_CLZ_##wc(_lz0, X); <<
760 _FP_ROUND(wc, X); 751 _FP_ROUND(wc, X); \
761 _FP_FRAC_CLZ_##wc(_lz1, X); <<
762 if (_lz1 < _lz0) <<
763 X##_e++; /* For overflow detecti <<
764 _FP_FRAC_SRL_##wc(X, _FP_WORKBITS) 752 _FP_FRAC_SRL_##wc(X, _FP_WORKBITS); \
765 _FP_FRAC_ASSEMBLE_##wc(r, X, rsize 753 _FP_FRAC_ASSEMBLE_##wc(r, X, rsize); \
766 } 754 } \
767 if (rsigned && X##_s) 755 if (rsigned && X##_s) \
768 r = -r; 756 r = -r; \
769 if (X##_e >= rsize - (rsigned > 0 || X 757 if (X##_e >= rsize - (rsigned > 0 || X##_s) \
770 || (!rsigned && X##_s)) 758 || (!rsigned && X##_s)) \
771 { /* overflow */ 759 { /* overflow */ \
772 fallthrough; <<
773 case FP_CLS_NAN: 760 case FP_CLS_NAN: \
774 case FP_CLS_INF: 761 case FP_CLS_INF: \
775 if (!rsigned) 762 if (!rsigned) \
776 { 763 { \
777 r = 0; 764 r = 0; \
778 if (!X##_s) !! 765 if (X##_s) \
779 r = ~r; 766 r = ~r; \
780 } 767 } \
781 else if (rsigned != 2) 768 else if (rsigned != 2) \
782 { 769 { \
783 r = 1; 770 r = 1; \
784 r <<= rsize - 1; 771 r <<= rsize - 1; \
785 r -= 1 - X##_s; 772 r -= 1 - X##_s; \
786 } 773 } \
787 FP_SET_EXCEPTION(FP_EX_INVALID); 774 FP_SET_EXCEPTION(FP_EX_INVALID); \
788 } 775 } \
789 break; 776 break; \
790 case FP_CLS_ZERO: 777 case FP_CLS_ZERO: \
791 break; 778 break; \
792 } 779 } \
793 } while (0) 780 } while (0)
794 781
795 #define _FP_FROM_INT(fs, wc, X, r, rsize, rtyp 782 #define _FP_FROM_INT(fs, wc, X, r, rsize, rtype) \
796 do { 783 do { \
797 if (r) 784 if (r) \
798 { 785 { \
799 unsigned rtype ur_; 786 unsigned rtype ur_; \
800 X##_c = FP_CLS_NORMAL; 787 X##_c = FP_CLS_NORMAL; \
801 788 \
802 if ((X##_s = (r < 0))) 789 if ((X##_s = (r < 0))) \
803 ur_ = (unsigned rtype) -r; 790 ur_ = (unsigned rtype) -r; \
804 else 791 else \
805 ur_ = (unsigned rtype) r; 792 ur_ = (unsigned rtype) r; \
806 (void) (((rsize) <= _FP_W_TYPE_SIZE) !! 793 if (rsize <= _FP_W_TYPE_SIZE) \
807 ? ({ __FP_CLZ(X##_e, ur_); }) !! 794 __FP_CLZ(X##_e, ur_); \
808 : ({ !! 795 else \
809 __FP_CLZ_2(X##_e, (_FP_W_ !! 796 __FP_CLZ_2(X##_e, (_FP_W_TYPE)(ur_ >> _FP_W_TYPE_SIZE), \
810 !! 797 (_FP_W_TYPE)ur_); \
811 })); <<
812 if (rsize < _FP_W_TYPE_SIZE) 798 if (rsize < _FP_W_TYPE_SIZE) \
813 X##_e -= (_FP_W_TYPE_SIZE - rs 799 X##_e -= (_FP_W_TYPE_SIZE - rsize); \
814 X##_e = rsize - X##_e - 1; 800 X##_e = rsize - X##_e - 1; \
815 801 \
816 if (_FP_FRACBITS_##fs < rsize && _FP_W 802 if (_FP_FRACBITS_##fs < rsize && _FP_WFRACBITS_##fs <= X##_e) \
817 __FP_FRAC_SRS_1(ur_, (X##_e - _FP_WF 803 __FP_FRAC_SRS_1(ur_, (X##_e - _FP_WFRACBITS_##fs + 1), rsize);\
818 _FP_FRAC_DISASSEMBLE_##wc(X, ur_, rsiz 804 _FP_FRAC_DISASSEMBLE_##wc(X, ur_, rsize); \
819 if ((_FP_WFRACBITS_##fs - X##_e - 1) > 805 if ((_FP_WFRACBITS_##fs - X##_e - 1) > 0) \
820 _FP_FRAC_SLL_##wc(X, (_FP_WFRACBITS_ 806 _FP_FRAC_SLL_##wc(X, (_FP_WFRACBITS_##fs - X##_e - 1)); \
821 } 807 } \
822 else 808 else \
823 { 809 { \
824 X##_c = FP_CLS_ZERO, X##_s = 0; 810 X##_c = FP_CLS_ZERO, X##_s = 0; \
825 } 811 } \
826 } while (0) 812 } while (0)
827 813
828 814
829 #define FP_CONV(dfs,sfs,dwc,swc,D,S) 815 #define FP_CONV(dfs,sfs,dwc,swc,D,S) \
830 do { 816 do { \
831 _FP_FRAC_CONV_##dwc##_##swc(dfs, sfs, D, S 817 _FP_FRAC_CONV_##dwc##_##swc(dfs, sfs, D, S); \
832 D##_e = S##_e; 818 D##_e = S##_e; \
833 D##_c = S##_c; 819 D##_c = S##_c; \
834 D##_s = S##_s; 820 D##_s = S##_s; \
835 } while (0) 821 } while (0)
836 822
837 /* 823 /*
838 * Helper primitives. 824 * Helper primitives.
839 */ 825 */
840 826
841 /* Count leading zeros in a word. */ 827 /* Count leading zeros in a word. */
842 828
843 #ifndef __FP_CLZ 829 #ifndef __FP_CLZ
844 #if _FP_W_TYPE_SIZE < 64 830 #if _FP_W_TYPE_SIZE < 64
845 /* this is just to shut the compiler up about 831 /* this is just to shut the compiler up about shifts > word length -- PMM 02/1998 */
846 #define __FP_CLZ(r, x) 832 #define __FP_CLZ(r, x) \
847 do { 833 do { \
848 _FP_W_TYPE _t = (x); 834 _FP_W_TYPE _t = (x); \
849 r = _FP_W_TYPE_SIZE - 1; 835 r = _FP_W_TYPE_SIZE - 1; \
850 if (_t > 0xffff) r -= 16; 836 if (_t > 0xffff) r -= 16; \
851 if (_t > 0xffff) _t >>= 16; 837 if (_t > 0xffff) _t >>= 16; \
852 if (_t > 0xff) r -= 8; 838 if (_t > 0xff) r -= 8; \
853 if (_t > 0xff) _t >>= 8; 839 if (_t > 0xff) _t >>= 8; \
854 if (_t & 0xf0) r -= 4; 840 if (_t & 0xf0) r -= 4; \
855 if (_t & 0xf0) _t >>= 4; 841 if (_t & 0xf0) _t >>= 4; \
856 if (_t & 0xc) r -= 2; 842 if (_t & 0xc) r -= 2; \
857 if (_t & 0xc) _t >>= 2; 843 if (_t & 0xc) _t >>= 2; \
858 if (_t & 0x2) r -= 1; 844 if (_t & 0x2) r -= 1; \
859 } while (0) 845 } while (0)
860 #else /* not _FP_W_TYPE_SIZE < 64 */ 846 #else /* not _FP_W_TYPE_SIZE < 64 */
861 #define __FP_CLZ(r, x) 847 #define __FP_CLZ(r, x) \
862 do { 848 do { \
863 _FP_W_TYPE _t = (x); 849 _FP_W_TYPE _t = (x); \
864 r = _FP_W_TYPE_SIZE - 1; 850 r = _FP_W_TYPE_SIZE - 1; \
865 if (_t > 0xffffffff) r -= 32; 851 if (_t > 0xffffffff) r -= 32; \
866 if (_t > 0xffffffff) _t >>= 32; 852 if (_t > 0xffffffff) _t >>= 32; \
867 if (_t > 0xffff) r -= 16; 853 if (_t > 0xffff) r -= 16; \
868 if (_t > 0xffff) _t >>= 16; 854 if (_t > 0xffff) _t >>= 16; \
869 if (_t > 0xff) r -= 8; 855 if (_t > 0xff) r -= 8; \
870 if (_t > 0xff) _t >>= 8; 856 if (_t > 0xff) _t >>= 8; \
871 if (_t & 0xf0) r -= 4; 857 if (_t & 0xf0) r -= 4; \
872 if (_t & 0xf0) _t >>= 4; 858 if (_t & 0xf0) _t >>= 4; \
873 if (_t & 0xc) r -= 2; 859 if (_t & 0xc) r -= 2; \
874 if (_t & 0xc) _t >>= 2; 860 if (_t & 0xc) _t >>= 2; \
875 if (_t & 0x2) r -= 1; 861 if (_t & 0x2) r -= 1; \
876 } while (0) 862 } while (0)
877 #endif /* not _FP_W_TYPE_SIZE < 64 */ 863 #endif /* not _FP_W_TYPE_SIZE < 64 */
878 #endif /* ndef __FP_CLZ */ 864 #endif /* ndef __FP_CLZ */
879 865
880 #define _FP_DIV_HELP_imm(q, r, n, d) 866 #define _FP_DIV_HELP_imm(q, r, n, d) \
881 do { 867 do { \
882 q = n / d, r = n % d; 868 q = n / d, r = n % d; \
883 } while (0) 869 } while (0)
884 870
885 #endif /* __MATH_EMU_OP_COMMON_H__ */ 871 #endif /* __MATH_EMU_OP_COMMON_H__ */
886 872
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