Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * MIPS floating point support |
| 3 | * Copyright (C) 1994-2000 Algorithmics Ltd. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * This program is free software; you can distribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License (Version 2) as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along |
| 15 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 16 | * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| 17 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | * Nov 7, 2000 |
| 19 | * Modification to allow integration with Linux kernel |
| 20 | * |
| 21 | * Kevin D. Kissell, kevink@mips.com and Carsten Langgard, carstenl@mips.com |
| 22 | * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved. |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 23 | */ |
Ralf Baechle | a663bf9 | 2005-10-23 13:44:31 +0100 | [diff] [blame] | 24 | #ifndef __ARCH_MIPS_MATH_EMU_IEEE754_H |
| 25 | #define __ARCH_MIPS_MATH_EMU_IEEE754_H |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 27 | #include <asm/byteorder.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/types.h> |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 29 | #include <linux/sched.h> |
Ralf Baechle | f80cc08 | 2014-04-16 00:40:02 +0200 | [diff] [blame^] | 30 | #include <asm/bitfield.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
| 32 | /* |
| 33 | * Not very pretty, but the Linux kernel's normal va_list definition |
| 34 | * does not allow it to be used as a structure element, as it is here. |
| 35 | */ |
| 36 | #ifndef _STDARG_H |
| 37 | #include <stdarg.h> |
| 38 | #endif |
| 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | struct ieee754dp_konst { |
Ralf Baechle | f80cc08 | 2014-04-16 00:40:02 +0200 | [diff] [blame^] | 41 | __BITFIELD_FIELD(unsigned sign:1, |
| 42 | __BITFIELD_FIELD(unsigned bexp:11, |
| 43 | __BITFIELD_FIELD(unsigned manthi:20, |
| 44 | __BITFIELD_FIELD(unsigned mantlo:32, |
| 45 | ;)))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | }; |
| 47 | |
| 48 | typedef union _ieee754dp { |
| 49 | struct ieee754dp_konst oparts; |
| 50 | struct { |
Ralf Baechle | f80cc08 | 2014-04-16 00:40:02 +0200 | [diff] [blame^] | 51 | __BITFIELD_FIELD(unsigned int sign:1, |
| 52 | __BITFIELD_FIELD(unsigned int bexp:11, |
| 53 | __BITFIELD_FIELD(u64 mant:52, |
| 54 | ;))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | } parts; |
| 56 | double d; |
| 57 | u64 bits; |
| 58 | } ieee754dp; |
| 59 | |
| 60 | struct ieee754sp_konst { |
Ralf Baechle | f80cc08 | 2014-04-16 00:40:02 +0200 | [diff] [blame^] | 61 | __BITFIELD_FIELD(unsigned sign:1, |
| 62 | __BITFIELD_FIELD(unsigned bexp:8, |
| 63 | __BITFIELD_FIELD(unsigned mant:23, |
| 64 | ;))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | }; |
| 66 | |
| 67 | typedef union _ieee754sp { |
| 68 | struct ieee754sp_konst parts; |
| 69 | float f; |
| 70 | u32 bits; |
| 71 | } ieee754sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
| 73 | /* |
| 74 | * single precision (often aka float) |
| 75 | */ |
| 76 | int ieee754sp_finite(ieee754sp x); |
| 77 | int ieee754sp_class(ieee754sp x); |
| 78 | |
| 79 | ieee754sp ieee754sp_abs(ieee754sp x); |
| 80 | ieee754sp ieee754sp_neg(ieee754sp x); |
| 81 | ieee754sp ieee754sp_scalb(ieee754sp x, int); |
| 82 | ieee754sp ieee754sp_logb(ieee754sp x); |
| 83 | |
| 84 | /* x with sign of y */ |
| 85 | ieee754sp ieee754sp_copysign(ieee754sp x, ieee754sp y); |
| 86 | |
| 87 | ieee754sp ieee754sp_add(ieee754sp x, ieee754sp y); |
| 88 | ieee754sp ieee754sp_sub(ieee754sp x, ieee754sp y); |
| 89 | ieee754sp ieee754sp_mul(ieee754sp x, ieee754sp y); |
| 90 | ieee754sp ieee754sp_div(ieee754sp x, ieee754sp y); |
| 91 | |
| 92 | ieee754sp ieee754sp_fint(int x); |
| 93 | ieee754sp ieee754sp_funs(unsigned x); |
| 94 | ieee754sp ieee754sp_flong(s64 x); |
| 95 | ieee754sp ieee754sp_fulong(u64 x); |
| 96 | ieee754sp ieee754sp_fdp(ieee754dp x); |
| 97 | |
| 98 | int ieee754sp_tint(ieee754sp x); |
| 99 | unsigned int ieee754sp_tuns(ieee754sp x); |
| 100 | s64 ieee754sp_tlong(ieee754sp x); |
| 101 | u64 ieee754sp_tulong(ieee754sp x); |
| 102 | |
| 103 | int ieee754sp_cmp(ieee754sp x, ieee754sp y, int cop, int sig); |
| 104 | /* |
| 105 | * basic sp math |
| 106 | */ |
| 107 | ieee754sp ieee754sp_modf(ieee754sp x, ieee754sp * ip); |
| 108 | ieee754sp ieee754sp_frexp(ieee754sp x, int *exp); |
| 109 | ieee754sp ieee754sp_ldexp(ieee754sp x, int exp); |
| 110 | |
| 111 | ieee754sp ieee754sp_ceil(ieee754sp x); |
| 112 | ieee754sp ieee754sp_floor(ieee754sp x); |
| 113 | ieee754sp ieee754sp_trunc(ieee754sp x); |
| 114 | |
| 115 | ieee754sp ieee754sp_sqrt(ieee754sp x); |
| 116 | |
| 117 | /* |
| 118 | * double precision (often aka double) |
| 119 | */ |
| 120 | int ieee754dp_finite(ieee754dp x); |
| 121 | int ieee754dp_class(ieee754dp x); |
| 122 | |
| 123 | /* x with sign of y */ |
| 124 | ieee754dp ieee754dp_copysign(ieee754dp x, ieee754dp y); |
| 125 | |
| 126 | ieee754dp ieee754dp_add(ieee754dp x, ieee754dp y); |
| 127 | ieee754dp ieee754dp_sub(ieee754dp x, ieee754dp y); |
| 128 | ieee754dp ieee754dp_mul(ieee754dp x, ieee754dp y); |
| 129 | ieee754dp ieee754dp_div(ieee754dp x, ieee754dp y); |
| 130 | |
| 131 | ieee754dp ieee754dp_abs(ieee754dp x); |
| 132 | ieee754dp ieee754dp_neg(ieee754dp x); |
| 133 | ieee754dp ieee754dp_scalb(ieee754dp x, int); |
| 134 | |
| 135 | /* return exponent as integer in floating point format |
| 136 | */ |
| 137 | ieee754dp ieee754dp_logb(ieee754dp x); |
| 138 | |
| 139 | ieee754dp ieee754dp_fint(int x); |
| 140 | ieee754dp ieee754dp_funs(unsigned x); |
| 141 | ieee754dp ieee754dp_flong(s64 x); |
| 142 | ieee754dp ieee754dp_fulong(u64 x); |
| 143 | ieee754dp ieee754dp_fsp(ieee754sp x); |
| 144 | |
| 145 | ieee754dp ieee754dp_ceil(ieee754dp x); |
| 146 | ieee754dp ieee754dp_floor(ieee754dp x); |
| 147 | ieee754dp ieee754dp_trunc(ieee754dp x); |
| 148 | |
| 149 | int ieee754dp_tint(ieee754dp x); |
| 150 | unsigned int ieee754dp_tuns(ieee754dp x); |
| 151 | s64 ieee754dp_tlong(ieee754dp x); |
| 152 | u64 ieee754dp_tulong(ieee754dp x); |
| 153 | |
| 154 | int ieee754dp_cmp(ieee754dp x, ieee754dp y, int cop, int sig); |
| 155 | /* |
| 156 | * basic sp math |
| 157 | */ |
| 158 | ieee754dp ieee754dp_modf(ieee754dp x, ieee754dp * ip); |
| 159 | ieee754dp ieee754dp_frexp(ieee754dp x, int *exp); |
| 160 | ieee754dp ieee754dp_ldexp(ieee754dp x, int exp); |
| 161 | |
| 162 | ieee754dp ieee754dp_ceil(ieee754dp x); |
| 163 | ieee754dp ieee754dp_floor(ieee754dp x); |
| 164 | ieee754dp ieee754dp_trunc(ieee754dp x); |
| 165 | |
| 166 | ieee754dp ieee754dp_sqrt(ieee754dp x); |
| 167 | |
| 168 | |
| 169 | |
| 170 | /* 5 types of floating point number |
| 171 | */ |
| 172 | #define IEEE754_CLASS_NORM 0x00 |
| 173 | #define IEEE754_CLASS_ZERO 0x01 |
| 174 | #define IEEE754_CLASS_DNORM 0x02 |
| 175 | #define IEEE754_CLASS_INF 0x03 |
| 176 | #define IEEE754_CLASS_SNAN 0x04 |
| 177 | #define IEEE754_CLASS_QNAN 0x05 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
| 179 | /* exception numbers */ |
| 180 | #define IEEE754_INEXACT 0x01 |
| 181 | #define IEEE754_UNDERFLOW 0x02 |
| 182 | #define IEEE754_OVERFLOW 0x04 |
| 183 | #define IEEE754_ZERO_DIVIDE 0x08 |
| 184 | #define IEEE754_INVALID_OPERATION 0x10 |
| 185 | |
| 186 | /* cmp operators |
| 187 | */ |
| 188 | #define IEEE754_CLT 0x01 |
| 189 | #define IEEE754_CEQ 0x02 |
| 190 | #define IEEE754_CGT 0x04 |
| 191 | #define IEEE754_CUN 0x08 |
| 192 | |
| 193 | /* rounding mode |
| 194 | */ |
| 195 | #define IEEE754_RN 0 /* round to nearest */ |
| 196 | #define IEEE754_RZ 1 /* round toward zero */ |
| 197 | #define IEEE754_RD 2 /* round toward -Infinity */ |
| 198 | #define IEEE754_RU 3 /* round toward +Infinity */ |
| 199 | |
| 200 | /* other naming */ |
| 201 | #define IEEE754_RM IEEE754_RD |
| 202 | #define IEEE754_RP IEEE754_RU |
| 203 | |
| 204 | /* "normal" comparisons |
| 205 | */ |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 206 | static inline int ieee754sp_eq(ieee754sp x, ieee754sp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | { |
| 208 | return ieee754sp_cmp(x, y, IEEE754_CEQ, 0); |
| 209 | } |
| 210 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 211 | static inline int ieee754sp_ne(ieee754sp x, ieee754sp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | { |
| 213 | return ieee754sp_cmp(x, y, |
| 214 | IEEE754_CLT | IEEE754_CGT | IEEE754_CUN, 0); |
| 215 | } |
| 216 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 217 | static inline int ieee754sp_lt(ieee754sp x, ieee754sp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | { |
| 219 | return ieee754sp_cmp(x, y, IEEE754_CLT, 0); |
| 220 | } |
| 221 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 222 | static inline int ieee754sp_le(ieee754sp x, ieee754sp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | { |
| 224 | return ieee754sp_cmp(x, y, IEEE754_CLT | IEEE754_CEQ, 0); |
| 225 | } |
| 226 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 227 | static inline int ieee754sp_gt(ieee754sp x, ieee754sp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | { |
| 229 | return ieee754sp_cmp(x, y, IEEE754_CGT, 0); |
| 230 | } |
| 231 | |
| 232 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 233 | static inline int ieee754sp_ge(ieee754sp x, ieee754sp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | { |
| 235 | return ieee754sp_cmp(x, y, IEEE754_CGT | IEEE754_CEQ, 0); |
| 236 | } |
| 237 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 238 | static inline int ieee754dp_eq(ieee754dp x, ieee754dp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | { |
| 240 | return ieee754dp_cmp(x, y, IEEE754_CEQ, 0); |
| 241 | } |
| 242 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 243 | static inline int ieee754dp_ne(ieee754dp x, ieee754dp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | { |
| 245 | return ieee754dp_cmp(x, y, |
| 246 | IEEE754_CLT | IEEE754_CGT | IEEE754_CUN, 0); |
| 247 | } |
| 248 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 249 | static inline int ieee754dp_lt(ieee754dp x, ieee754dp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | { |
| 251 | return ieee754dp_cmp(x, y, IEEE754_CLT, 0); |
| 252 | } |
| 253 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 254 | static inline int ieee754dp_le(ieee754dp x, ieee754dp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | { |
| 256 | return ieee754dp_cmp(x, y, IEEE754_CLT | IEEE754_CEQ, 0); |
| 257 | } |
| 258 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 259 | static inline int ieee754dp_gt(ieee754dp x, ieee754dp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | { |
| 261 | return ieee754dp_cmp(x, y, IEEE754_CGT, 0); |
| 262 | } |
| 263 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 264 | static inline int ieee754dp_ge(ieee754dp x, ieee754dp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | { |
| 266 | return ieee754dp_cmp(x, y, IEEE754_CGT | IEEE754_CEQ, 0); |
| 267 | } |
| 268 | |
| 269 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 270 | /* |
| 271 | * Like strtod |
| 272 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | ieee754dp ieee754dp_fstr(const char *s, char **endp); |
| 274 | char *ieee754dp_tstr(ieee754dp x, int prec, int fmt, int af); |
| 275 | |
| 276 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 277 | /* |
| 278 | * The control status register |
| 279 | */ |
| 280 | struct _ieee754_csr { |
Ralf Baechle | f80cc08 | 2014-04-16 00:40:02 +0200 | [diff] [blame^] | 281 | __BITFIELD_FIELD(unsigned pad0:7, |
| 282 | __BITFIELD_FIELD(unsigned nod:1, /* set 1 for no denormalised numbers */ |
| 283 | __BITFIELD_FIELD(unsigned c:1, /* condition */ |
| 284 | __BITFIELD_FIELD(unsigned pad1:5, |
| 285 | __BITFIELD_FIELD(unsigned cx:6, /* exceptions this operation */ |
| 286 | __BITFIELD_FIELD(unsigned mx:5, /* exception enable mask */ |
| 287 | __BITFIELD_FIELD(unsigned sx:5, /* exceptions total */ |
| 288 | __BITFIELD_FIELD(unsigned rm:2, /* current rounding mode */ |
| 289 | ;)))))))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | }; |
Atsushi Nemoto | eae8907 | 2006-05-16 01:26:03 +0900 | [diff] [blame] | 291 | #define ieee754_csr (*(struct _ieee754_csr *)(¤t->thread.fpu.fcr31)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 293 | static inline unsigned ieee754_getrm(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | { |
| 295 | return (ieee754_csr.rm); |
| 296 | } |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 297 | static inline unsigned ieee754_setrm(unsigned rm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | { |
| 299 | return (ieee754_csr.rm = rm); |
| 300 | } |
| 301 | |
| 302 | /* |
| 303 | * get current exceptions |
| 304 | */ |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 305 | static inline unsigned ieee754_getcx(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | { |
| 307 | return (ieee754_csr.cx); |
| 308 | } |
| 309 | |
| 310 | /* test for current exception condition |
| 311 | */ |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 312 | static inline int ieee754_cxtest(unsigned n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | { |
| 314 | return (ieee754_csr.cx & n); |
| 315 | } |
| 316 | |
| 317 | /* |
| 318 | * get sticky exceptions |
| 319 | */ |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 320 | static inline unsigned ieee754_getsx(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | { |
| 322 | return (ieee754_csr.sx); |
| 323 | } |
| 324 | |
| 325 | /* clear sticky conditions |
| 326 | */ |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 327 | static inline unsigned ieee754_clrsx(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | { |
| 329 | return (ieee754_csr.sx = 0); |
| 330 | } |
| 331 | |
| 332 | /* test for sticky exception condition |
| 333 | */ |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 334 | static inline int ieee754_sxtest(unsigned n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | { |
| 336 | return (ieee754_csr.sx & n); |
| 337 | } |
| 338 | |
| 339 | /* debugging */ |
| 340 | ieee754sp ieee754sp_dump(char *s, ieee754sp x); |
| 341 | ieee754dp ieee754dp_dump(char *s, ieee754dp x); |
| 342 | |
| 343 | #define IEEE754_SPCVAL_PZERO 0 |
| 344 | #define IEEE754_SPCVAL_NZERO 1 |
| 345 | #define IEEE754_SPCVAL_PONE 2 |
| 346 | #define IEEE754_SPCVAL_NONE 3 |
| 347 | #define IEEE754_SPCVAL_PTEN 4 |
| 348 | #define IEEE754_SPCVAL_NTEN 5 |
| 349 | #define IEEE754_SPCVAL_PINFINITY 6 |
| 350 | #define IEEE754_SPCVAL_NINFINITY 7 |
| 351 | #define IEEE754_SPCVAL_INDEF 8 |
| 352 | #define IEEE754_SPCVAL_PMAX 9 /* +max norm */ |
| 353 | #define IEEE754_SPCVAL_NMAX 10 /* -max norm */ |
| 354 | #define IEEE754_SPCVAL_PMIN 11 /* +min norm */ |
| 355 | #define IEEE754_SPCVAL_NMIN 12 /* +min norm */ |
| 356 | #define IEEE754_SPCVAL_PMIND 13 /* +min denorm */ |
| 357 | #define IEEE754_SPCVAL_NMIND 14 /* +min denorm */ |
| 358 | #define IEEE754_SPCVAL_P1E31 15 /* + 1.0e31 */ |
| 359 | #define IEEE754_SPCVAL_P1E63 16 /* + 1.0e63 */ |
| 360 | |
| 361 | extern const struct ieee754dp_konst __ieee754dp_spcvals[]; |
| 362 | extern const struct ieee754sp_konst __ieee754sp_spcvals[]; |
| 363 | #define ieee754dp_spcvals ((const ieee754dp *)__ieee754dp_spcvals) |
| 364 | #define ieee754sp_spcvals ((const ieee754sp *)__ieee754sp_spcvals) |
| 365 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 366 | /* |
| 367 | * Return infinity with given sign |
| 368 | */ |
| 369 | #define ieee754dp_inf(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)]) |
| 370 | #define ieee754dp_zero(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PZERO+(sn)]) |
| 371 | #define ieee754dp_one(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PONE+(sn)]) |
| 372 | #define ieee754dp_ten(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PTEN+(sn)]) |
| 373 | #define ieee754dp_indef() (ieee754dp_spcvals[IEEE754_SPCVAL_INDEF]) |
| 374 | #define ieee754dp_max(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMAX+(sn)]) |
| 375 | #define ieee754dp_min(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMIN+(sn)]) |
| 376 | #define ieee754dp_mind(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMIND+(sn)]) |
| 377 | #define ieee754dp_1e31() (ieee754dp_spcvals[IEEE754_SPCVAL_P1E31]) |
| 378 | #define ieee754dp_1e63() (ieee754dp_spcvals[IEEE754_SPCVAL_P1E63]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 380 | #define ieee754sp_inf(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)]) |
| 381 | #define ieee754sp_zero(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PZERO+(sn)]) |
| 382 | #define ieee754sp_one(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PONE+(sn)]) |
| 383 | #define ieee754sp_ten(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PTEN+(sn)]) |
| 384 | #define ieee754sp_indef() (ieee754sp_spcvals[IEEE754_SPCVAL_INDEF]) |
| 385 | #define ieee754sp_max(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMAX+(sn)]) |
| 386 | #define ieee754sp_min(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMIN+(sn)]) |
| 387 | #define ieee754sp_mind(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMIND+(sn)]) |
| 388 | #define ieee754sp_1e31() (ieee754sp_spcvals[IEEE754_SPCVAL_P1E31]) |
| 389 | #define ieee754sp_1e63() (ieee754sp_spcvals[IEEE754_SPCVAL_P1E63]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 391 | /* |
| 392 | * Indefinite integer value |
| 393 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | #define ieee754si_indef() INT_MAX |
| 395 | #ifdef LONG_LONG_MAX |
| 396 | #define ieee754di_indef() LONG_LONG_MAX |
| 397 | #else |
| 398 | #define ieee754di_indef() ((s64)(~0ULL>>1)) |
| 399 | #endif |
| 400 | |
| 401 | /* IEEE exception context, passed to handler */ |
| 402 | struct ieee754xctx { |
| 403 | const char *op; /* operation name */ |
| 404 | int rt; /* result type */ |
| 405 | union { |
| 406 | ieee754sp sp; /* single precision */ |
| 407 | ieee754dp dp; /* double precision */ |
| 408 | #ifdef IEEE854_XP |
| 409 | ieee754xp xp; /* extended precision */ |
| 410 | #endif |
| 411 | int si; /* standard signed integer (32bits) */ |
| 412 | s64 di; /* extended signed integer (64bits) */ |
| 413 | } rv; /* default result format implied by op */ |
| 414 | va_list ap; |
| 415 | }; |
| 416 | |
| 417 | /* result types for xctx.rt */ |
| 418 | #define IEEE754_RT_SP 0 |
| 419 | #define IEEE754_RT_DP 1 |
| 420 | #define IEEE754_RT_XP 2 |
| 421 | #define IEEE754_RT_SI 3 |
| 422 | #define IEEE754_RT_DI 4 |
| 423 | |
| 424 | extern void ieee754_xcpt(struct ieee754xctx *xcp); |
| 425 | |
| 426 | /* compat */ |
| 427 | #define ieee754dp_fix(x) ieee754dp_tint(x) |
| 428 | #define ieee754sp_fix(x) ieee754sp_tint(x) |
Ralf Baechle | a663bf9 | 2005-10-23 13:44:31 +0100 | [diff] [blame] | 429 | |
| 430 | #endif /* __ARCH_MIPS_MATH_EMU_IEEE754_H */ |