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 | cae5506 | 2014-04-16 00:47:59 +0200 | [diff] [blame] | 27 | #include <linux/compiler.h> |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 28 | #include <asm/byteorder.h> |
Ralf Baechle | e812a73 | 2014-04-19 14:20:54 +0200 | [diff] [blame] | 29 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/types.h> |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 31 | #include <linux/sched.h> |
Ralf Baechle | f80cc08 | 2014-04-16 00:40:02 +0200 | [diff] [blame] | 32 | #include <asm/bitfield.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Ralf Baechle | 2370881 | 2014-04-16 01:16:02 +0200 | [diff] [blame] | 34 | struct ieee754dp_const { |
Ralf Baechle | f80cc08 | 2014-04-16 00:40:02 +0200 | [diff] [blame] | 35 | __BITFIELD_FIELD(unsigned sign:1, |
| 36 | __BITFIELD_FIELD(unsigned bexp:11, |
| 37 | __BITFIELD_FIELD(unsigned manthi:20, |
| 38 | __BITFIELD_FIELD(unsigned mantlo:32, |
| 39 | ;)))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | }; |
| 41 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 42 | union ieee754dp { |
Ralf Baechle | 2370881 | 2014-04-16 01:16:02 +0200 | [diff] [blame] | 43 | struct ieee754dp_const oparts; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | struct { |
Ralf Baechle | f80cc08 | 2014-04-16 00:40:02 +0200 | [diff] [blame] | 45 | __BITFIELD_FIELD(unsigned int sign:1, |
| 46 | __BITFIELD_FIELD(unsigned int bexp:11, |
| 47 | __BITFIELD_FIELD(u64 mant:52, |
| 48 | ;))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | } parts; |
| 50 | double d; |
| 51 | u64 bits; |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 52 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Ralf Baechle | 2370881 | 2014-04-16 01:16:02 +0200 | [diff] [blame] | 54 | struct ieee754sp_const { |
Ralf Baechle | f80cc08 | 2014-04-16 00:40:02 +0200 | [diff] [blame] | 55 | __BITFIELD_FIELD(unsigned sign:1, |
| 56 | __BITFIELD_FIELD(unsigned bexp:8, |
| 57 | __BITFIELD_FIELD(unsigned mant:23, |
| 58 | ;))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | }; |
| 60 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 61 | union ieee754sp { |
Ralf Baechle | 2370881 | 2014-04-16 01:16:02 +0200 | [diff] [blame] | 62 | struct ieee754sp_const parts; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | float f; |
| 64 | u32 bits; |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 65 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
| 67 | /* |
| 68 | * single precision (often aka float) |
| 69 | */ |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 70 | int ieee754sp_class(union ieee754sp x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 72 | union ieee754sp ieee754sp_abs(union ieee754sp x); |
| 73 | union ieee754sp ieee754sp_neg(union ieee754sp x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 75 | union ieee754sp ieee754sp_add(union ieee754sp x, union ieee754sp y); |
| 76 | union ieee754sp ieee754sp_sub(union ieee754sp x, union ieee754sp y); |
| 77 | union ieee754sp ieee754sp_mul(union ieee754sp x, union ieee754sp y); |
| 78 | union ieee754sp ieee754sp_div(union ieee754sp x, union ieee754sp y); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 80 | union ieee754sp ieee754sp_fint(int x); |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 81 | union ieee754sp ieee754sp_flong(s64 x); |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 82 | union ieee754sp ieee754sp_fdp(union ieee754dp x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 84 | int ieee754sp_tint(union ieee754sp x); |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 85 | s64 ieee754sp_tlong(union ieee754sp x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 87 | int ieee754sp_cmp(union ieee754sp x, union ieee754sp y, int cop, int sig); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 89 | union ieee754sp ieee754sp_sqrt(union ieee754sp x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
| 91 | /* |
| 92 | * double precision (often aka double) |
| 93 | */ |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 94 | int ieee754dp_class(union ieee754dp x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 96 | union ieee754dp ieee754dp_add(union ieee754dp x, union ieee754dp y); |
| 97 | union ieee754dp ieee754dp_sub(union ieee754dp x, union ieee754dp y); |
| 98 | union ieee754dp ieee754dp_mul(union ieee754dp x, union ieee754dp y); |
| 99 | union ieee754dp ieee754dp_div(union ieee754dp x, union ieee754dp y); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 101 | union ieee754dp ieee754dp_abs(union ieee754dp x); |
| 102 | union ieee754dp ieee754dp_neg(union ieee754dp x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 104 | union ieee754dp ieee754dp_fint(int x); |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 105 | union ieee754dp ieee754dp_flong(s64 x); |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 106 | union ieee754dp ieee754dp_fsp(union ieee754sp x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 108 | int ieee754dp_tint(union ieee754dp x); |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 109 | s64 ieee754dp_tlong(union ieee754dp x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 111 | int ieee754dp_cmp(union ieee754dp x, union ieee754dp y, int cop, int sig); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 113 | union ieee754dp ieee754dp_sqrt(union ieee754dp x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
| 115 | |
| 116 | |
| 117 | /* 5 types of floating point number |
| 118 | */ |
Ralf Baechle | 9e8bad1 | 2014-04-19 00:36:32 +0200 | [diff] [blame] | 119 | enum { |
| 120 | IEEE754_CLASS_NORM = 0x00, |
| 121 | IEEE754_CLASS_ZERO = 0x01, |
| 122 | IEEE754_CLASS_DNORM = 0x02, |
| 123 | IEEE754_CLASS_INF = 0x03, |
| 124 | IEEE754_CLASS_SNAN = 0x04, |
| 125 | IEEE754_CLASS_QNAN = 0x05, |
| 126 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
| 128 | /* exception numbers */ |
| 129 | #define IEEE754_INEXACT 0x01 |
| 130 | #define IEEE754_UNDERFLOW 0x02 |
| 131 | #define IEEE754_OVERFLOW 0x04 |
| 132 | #define IEEE754_ZERO_DIVIDE 0x08 |
| 133 | #define IEEE754_INVALID_OPERATION 0x10 |
| 134 | |
| 135 | /* cmp operators |
| 136 | */ |
| 137 | #define IEEE754_CLT 0x01 |
| 138 | #define IEEE754_CEQ 0x02 |
| 139 | #define IEEE754_CGT 0x04 |
| 140 | #define IEEE754_CUN 0x08 |
| 141 | |
| 142 | /* rounding mode |
| 143 | */ |
| 144 | #define IEEE754_RN 0 /* round to nearest */ |
| 145 | #define IEEE754_RZ 1 /* round toward zero */ |
| 146 | #define IEEE754_RD 2 /* round toward -Infinity */ |
| 147 | #define IEEE754_RU 3 /* round toward +Infinity */ |
| 148 | |
| 149 | /* other naming */ |
| 150 | #define IEEE754_RM IEEE754_RD |
| 151 | #define IEEE754_RP IEEE754_RU |
| 152 | |
| 153 | /* "normal" comparisons |
| 154 | */ |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 155 | static inline int ieee754sp_eq(union ieee754sp x, union ieee754sp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | { |
| 157 | return ieee754sp_cmp(x, y, IEEE754_CEQ, 0); |
| 158 | } |
| 159 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 160 | static inline int ieee754sp_ne(union ieee754sp x, union ieee754sp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | { |
| 162 | return ieee754sp_cmp(x, y, |
| 163 | IEEE754_CLT | IEEE754_CGT | IEEE754_CUN, 0); |
| 164 | } |
| 165 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 166 | static inline int ieee754sp_lt(union ieee754sp x, union ieee754sp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | { |
| 168 | return ieee754sp_cmp(x, y, IEEE754_CLT, 0); |
| 169 | } |
| 170 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 171 | static inline int ieee754sp_le(union ieee754sp x, union ieee754sp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | { |
| 173 | return ieee754sp_cmp(x, y, IEEE754_CLT | IEEE754_CEQ, 0); |
| 174 | } |
| 175 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 176 | static inline int ieee754sp_gt(union ieee754sp x, union ieee754sp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | { |
| 178 | return ieee754sp_cmp(x, y, IEEE754_CGT, 0); |
| 179 | } |
| 180 | |
| 181 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 182 | static inline int ieee754sp_ge(union ieee754sp x, union ieee754sp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | { |
| 184 | return ieee754sp_cmp(x, y, IEEE754_CGT | IEEE754_CEQ, 0); |
| 185 | } |
| 186 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 187 | static inline int ieee754dp_eq(union ieee754dp x, union ieee754dp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | { |
| 189 | return ieee754dp_cmp(x, y, IEEE754_CEQ, 0); |
| 190 | } |
| 191 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 192 | static inline int ieee754dp_ne(union ieee754dp x, union ieee754dp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | { |
| 194 | return ieee754dp_cmp(x, y, |
| 195 | IEEE754_CLT | IEEE754_CGT | IEEE754_CUN, 0); |
| 196 | } |
| 197 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 198 | static inline int ieee754dp_lt(union ieee754dp x, union ieee754dp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | { |
| 200 | return ieee754dp_cmp(x, y, IEEE754_CLT, 0); |
| 201 | } |
| 202 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 203 | static inline int ieee754dp_le(union ieee754dp x, union ieee754dp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | { |
| 205 | return ieee754dp_cmp(x, y, IEEE754_CLT | IEEE754_CEQ, 0); |
| 206 | } |
| 207 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 208 | static inline int ieee754dp_gt(union ieee754dp x, union ieee754dp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | { |
| 210 | return ieee754dp_cmp(x, y, IEEE754_CGT, 0); |
| 211 | } |
| 212 | |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 213 | static inline int ieee754dp_ge(union ieee754dp x, union ieee754dp y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | { |
| 215 | return ieee754dp_cmp(x, y, IEEE754_CGT | IEEE754_CEQ, 0); |
| 216 | } |
| 217 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 218 | /* |
| 219 | * The control status register |
| 220 | */ |
| 221 | struct _ieee754_csr { |
Ralf Baechle | f80cc08 | 2014-04-16 00:40:02 +0200 | [diff] [blame] | 222 | __BITFIELD_FIELD(unsigned pad0:7, |
| 223 | __BITFIELD_FIELD(unsigned nod:1, /* set 1 for no denormalised numbers */ |
| 224 | __BITFIELD_FIELD(unsigned c:1, /* condition */ |
| 225 | __BITFIELD_FIELD(unsigned pad1:5, |
| 226 | __BITFIELD_FIELD(unsigned cx:6, /* exceptions this operation */ |
| 227 | __BITFIELD_FIELD(unsigned mx:5, /* exception enable mask */ |
| 228 | __BITFIELD_FIELD(unsigned sx:5, /* exceptions total */ |
| 229 | __BITFIELD_FIELD(unsigned rm:2, /* current rounding mode */ |
| 230 | ;)))))))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | }; |
Atsushi Nemoto | eae8907 | 2006-05-16 01:26:03 +0900 | [diff] [blame] | 232 | #define ieee754_csr (*(struct _ieee754_csr *)(¤t->thread.fpu.fcr31)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 234 | static inline unsigned ieee754_getrm(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | { |
| 236 | return (ieee754_csr.rm); |
| 237 | } |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 238 | static inline unsigned ieee754_setrm(unsigned rm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | { |
| 240 | return (ieee754_csr.rm = rm); |
| 241 | } |
| 242 | |
| 243 | /* |
| 244 | * get current exceptions |
| 245 | */ |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 246 | static inline unsigned ieee754_getcx(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | { |
| 248 | return (ieee754_csr.cx); |
| 249 | } |
| 250 | |
| 251 | /* test for current exception condition |
| 252 | */ |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 253 | static inline int ieee754_cxtest(unsigned n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | { |
| 255 | return (ieee754_csr.cx & n); |
| 256 | } |
| 257 | |
| 258 | /* |
| 259 | * get sticky exceptions |
| 260 | */ |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 261 | static inline unsigned ieee754_getsx(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | { |
| 263 | return (ieee754_csr.sx); |
| 264 | } |
| 265 | |
| 266 | /* clear sticky conditions |
| 267 | */ |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 268 | static inline unsigned ieee754_clrsx(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | { |
| 270 | return (ieee754_csr.sx = 0); |
| 271 | } |
| 272 | |
| 273 | /* test for sticky exception condition |
| 274 | */ |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 275 | static inline int ieee754_sxtest(unsigned n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | { |
| 277 | return (ieee754_csr.sx & n); |
| 278 | } |
| 279 | |
| 280 | /* debugging */ |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 281 | union ieee754sp ieee754sp_dump(char *s, union ieee754sp x); |
| 282 | union ieee754dp ieee754dp_dump(char *s, union ieee754dp x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | |
| 284 | #define IEEE754_SPCVAL_PZERO 0 |
| 285 | #define IEEE754_SPCVAL_NZERO 1 |
| 286 | #define IEEE754_SPCVAL_PONE 2 |
| 287 | #define IEEE754_SPCVAL_NONE 3 |
| 288 | #define IEEE754_SPCVAL_PTEN 4 |
| 289 | #define IEEE754_SPCVAL_NTEN 5 |
| 290 | #define IEEE754_SPCVAL_PINFINITY 6 |
| 291 | #define IEEE754_SPCVAL_NINFINITY 7 |
| 292 | #define IEEE754_SPCVAL_INDEF 8 |
| 293 | #define IEEE754_SPCVAL_PMAX 9 /* +max norm */ |
| 294 | #define IEEE754_SPCVAL_NMAX 10 /* -max norm */ |
| 295 | #define IEEE754_SPCVAL_PMIN 11 /* +min norm */ |
| 296 | #define IEEE754_SPCVAL_NMIN 12 /* +min norm */ |
| 297 | #define IEEE754_SPCVAL_PMIND 13 /* +min denorm */ |
| 298 | #define IEEE754_SPCVAL_NMIND 14 /* +min denorm */ |
| 299 | #define IEEE754_SPCVAL_P1E31 15 /* + 1.0e31 */ |
| 300 | #define IEEE754_SPCVAL_P1E63 16 /* + 1.0e63 */ |
| 301 | |
Ralf Baechle | 2370881 | 2014-04-16 01:16:02 +0200 | [diff] [blame] | 302 | extern const struct ieee754dp_const __ieee754dp_spcvals[]; |
| 303 | extern const struct ieee754sp_const __ieee754sp_spcvals[]; |
Ralf Baechle | 2209bcb | 2014-04-16 01:31:11 +0200 | [diff] [blame] | 304 | #define ieee754dp_spcvals ((const union ieee754dp *)__ieee754dp_spcvals) |
| 305 | #define ieee754sp_spcvals ((const union ieee754sp *)__ieee754sp_spcvals) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 307 | /* |
| 308 | * Return infinity with given sign |
| 309 | */ |
| 310 | #define ieee754dp_inf(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)]) |
| 311 | #define ieee754dp_zero(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PZERO+(sn)]) |
| 312 | #define ieee754dp_one(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PONE+(sn)]) |
| 313 | #define ieee754dp_ten(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PTEN+(sn)]) |
| 314 | #define ieee754dp_indef() (ieee754dp_spcvals[IEEE754_SPCVAL_INDEF]) |
| 315 | #define ieee754dp_max(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMAX+(sn)]) |
| 316 | #define ieee754dp_min(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMIN+(sn)]) |
| 317 | #define ieee754dp_mind(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMIND+(sn)]) |
| 318 | #define ieee754dp_1e31() (ieee754dp_spcvals[IEEE754_SPCVAL_P1E31]) |
| 319 | #define ieee754dp_1e63() (ieee754dp_spcvals[IEEE754_SPCVAL_P1E63]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 321 | #define ieee754sp_inf(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)]) |
| 322 | #define ieee754sp_zero(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PZERO+(sn)]) |
| 323 | #define ieee754sp_one(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PONE+(sn)]) |
| 324 | #define ieee754sp_ten(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PTEN+(sn)]) |
| 325 | #define ieee754sp_indef() (ieee754sp_spcvals[IEEE754_SPCVAL_INDEF]) |
| 326 | #define ieee754sp_max(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMAX+(sn)]) |
| 327 | #define ieee754sp_min(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMIN+(sn)]) |
| 328 | #define ieee754sp_mind(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMIND+(sn)]) |
| 329 | #define ieee754sp_1e31() (ieee754sp_spcvals[IEEE754_SPCVAL_P1E31]) |
| 330 | #define ieee754sp_1e63() (ieee754sp_spcvals[IEEE754_SPCVAL_P1E63]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | |
Ralf Baechle | cd21dfc | 2005-04-28 13:39:10 +0000 | [diff] [blame] | 332 | /* |
| 333 | * Indefinite integer value |
| 334 | */ |
Ralf Baechle | e812a73 | 2014-04-19 14:20:54 +0200 | [diff] [blame] | 335 | static inline int ieee754si_indef(void) |
| 336 | { |
| 337 | return INT_MAX; |
| 338 | } |
| 339 | |
| 340 | static inline s64 ieee754di_indef(void) |
| 341 | { |
| 342 | return S64_MAX; |
| 343 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | /* result types for xctx.rt */ |
| 346 | #define IEEE754_RT_SP 0 |
| 347 | #define IEEE754_RT_DP 1 |
| 348 | #define IEEE754_RT_XP 2 |
| 349 | #define IEEE754_RT_SI 3 |
| 350 | #define IEEE754_RT_DI 4 |
| 351 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | /* compat */ |
| 353 | #define ieee754dp_fix(x) ieee754dp_tint(x) |
| 354 | #define ieee754sp_fix(x) ieee754sp_tint(x) |
Ralf Baechle | a663bf9 | 2005-10-23 13:44:31 +0100 | [diff] [blame] | 355 | |
| 356 | #endif /* __ARCH_MIPS_MATH_EMU_IEEE754_H */ |