1 /* Software floating-point emulation. 2 Definitions for IEEE Double Precision 3 Copyright (C) 1997-2016 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). 9 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. 14 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.) 23 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. 28 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/>. */ 32 33 #ifndef SOFT_FP_DOUBLE_H 34 #define SOFT_FP_DOUBLE_H 1 35 36 #if _FP_W_TYPE_SIZE < 32 37 # error "Here's a nickel kid. Go buy yourself a real computer." 38 #endif 39 40 #if _FP_W_TYPE_SIZE < 64 41 # define _FP_FRACTBITS_D (2 * _FP_W_TYPE_SIZE) 42 # define _FP_FRACTBITS_DW_D (4 * _FP_W_TYPE_SIZE) 43 #else 44 # define _FP_FRACTBITS_D _FP_W_TYPE_SIZE 45 # define _FP_FRACTBITS_DW_D (2 * _FP_W_TYPE_SIZE) 46 #endif 47 48 #define _FP_FRACBITS_D 53 49 #define _FP_FRACXBITS_D (_FP_FRACTBITS_D - _FP_FRACBITS_D) 50 #define _FP_WFRACBITS_D (_FP_WORKBITS + _FP_FRACBITS_D) 51 #define _FP_WFRACXBITS_D (_FP_FRACTBITS_D - _FP_WFRACBITS_D) 52 #define _FP_EXPBITS_D 11 53 #define _FP_EXPBIAS_D 1023 54 #define _FP_EXPMAX_D 2047 55 56 #define _FP_QNANBIT_D \ 57 ((_FP_W_TYPE) 1 << (_FP_FRACBITS_D-2) % _FP_W_TYPE_SIZE) 58 #define _FP_QNANBIT_SH_D \ 59 ((_FP_W_TYPE) 1 << (_FP_FRACBITS_D-2+_FP_WORKBITS) % _FP_W_TYPE_SIZE) 60 #define _FP_IMPLBIT_D \ 61 ((_FP_W_TYPE) 1 << (_FP_FRACBITS_D-1) % _FP_W_TYPE_SIZE) 62 #define _FP_IMPLBIT_SH_D \ 63 ((_FP_W_TYPE) 1 << (_FP_FRACBITS_D-1+_FP_WORKBITS) % _FP_W_TYPE_SIZE) 64 #define _FP_OVERFLOW_D \ 65 ((_FP_W_TYPE) 1 << _FP_WFRACBITS_D % _FP_W_TYPE_SIZE) 66 67 #define _FP_WFRACBITS_DW_D (2 * _FP_WFRACBITS_D) 68 #define _FP_WFRACXBITS_DW_D (_FP_FRACTBITS_DW_D - _FP_WFRACBITS_DW_D) 69 #define _FP_HIGHBIT_DW_D \ 70 ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_DW_D - 1) % _FP_W_TYPE_SIZE) 71 72 typedef float DFtype __attribute__ ((mode (DF))); 73 74 #if _FP_W_TYPE_SIZE < 64 75 76 union _FP_UNION_D 77 { 78 DFtype flt; 79 struct _FP_STRUCT_LAYOUT 80 { 81 # if __BYTE_ORDER == __BIG_ENDIAN 82 unsigned sign : 1; 83 unsigned exp : _FP_EXPBITS_D; 84 unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE; 85 unsigned frac0 : _FP_W_TYPE_SIZE; 86 # else 87 unsigned frac0 : _FP_W_TYPE_SIZE; 88 unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE; 89 unsigned exp : _FP_EXPBITS_D; 90 unsigned sign : 1; 91 # endif 92 } bits __attribute__ ((packed)); 93 }; 94 95 # define FP_DECL_D(X) _FP_DECL (2, X) 96 # define FP_UNPACK_RAW_D(X, val) _FP_UNPACK_RAW_2 (D, X, (val)) 97 # define FP_UNPACK_RAW_DP(X, val) _FP_UNPACK_RAW_2_P (D, X, (val)) 98 # define FP_PACK_RAW_D(val, X) _FP_PACK_RAW_2 (D, (val), X) 99 # define FP_PACK_RAW_DP(val, X) \ 100 do \ 101 { \ 102 if (!FP_INHIBIT_RESULTS) \ 103 _FP_PACK_RAW_2_P (D, (val), X); \ 104 } \ 105 while (0) 106 107 # define FP_UNPACK_D(X, val) \ 108 do \ 109 { \ 110 _FP_UNPACK_RAW_2 (D, X, (val)); \ 111 _FP_UNPACK_CANONICAL (D, 2, X); \ 112 } \ 113 while (0) 114 115 # define FP_UNPACK_DP(X, val) \ 116 do \ 117 { \ 118 _FP_UNPACK_RAW_2_P (D, X, (val)); \ 119 _FP_UNPACK_CANONICAL (D, 2, X); \ 120 } \ 121 while (0) 122 123 # define FP_UNPACK_SEMIRAW_D(X, val) \ 124 do \ 125 { \ 126 _FP_UNPACK_RAW_2 (D, X, (val)); \ 127 _FP_UNPACK_SEMIRAW (D, 2, X); \ 128 } \ 129 while (0) 130 131 # define FP_UNPACK_SEMIRAW_DP(X, val) \ 132 do \ 133 { \ 134 _FP_UNPACK_RAW_2_P (D, X, (val)); \ 135 _FP_UNPACK_SEMIRAW (D, 2, X); \ 136 } \ 137 while (0) 138 139 # define FP_PACK_D(val, X) \ 140 do \ 141 { \ 142 _FP_PACK_CANONICAL (D, 2, X); \ 143 _FP_PACK_RAW_2 (D, (val), X); \ 144 } \ 145 while (0) 146 147 # define FP_PACK_DP(val, X) \ 148 do \ 149 { \ 150 _FP_PACK_CANONICAL (D, 2, X); \ 151 if (!FP_INHIBIT_RESULTS) \ 152 _FP_PACK_RAW_2_P (D, (val), X); \ 153 } \ 154 while (0) 155 156 # define FP_PACK_SEMIRAW_D(val, X) \ 157 do \ 158 { \ 159 _FP_PACK_SEMIRAW (D, 2, X); \ 160 _FP_PACK_RAW_2 (D, (val), X); \ 161 } \ 162 while (0) 163 164 # define FP_PACK_SEMIRAW_DP(val, X) \ 165 do \ 166 { \ 167 _FP_PACK_SEMIRAW (D, 2, X); \ 168 if (!FP_INHIBIT_RESULTS) \ 169 _FP_PACK_RAW_2_P (D, (val), X); \ 170 } \ 171 while (0) 172 173 # define FP_ISSIGNAN_D(X) _FP_ISSIGNAN (D, 2, X) 174 # define FP_NEG_D(R, X) _FP_NEG (D, 2, R, X) 175 # define FP_ADD_D(R, X, Y) _FP_ADD (D, 2, R, X, Y) 176 # define FP_SUB_D(R, X, Y) _FP_SUB (D, 2, R, X, Y) 177 # define FP_MUL_D(R, X, Y) _FP_MUL (D, 2, R, X, Y) 178 # define FP_DIV_D(R, X, Y) _FP_DIV (D, 2, R, X, Y) 179 # define FP_SQRT_D(R, X) _FP_SQRT (D, 2, R, X) 180 # define _FP_SQRT_MEAT_D(R, S, T, X, Q) _FP_SQRT_MEAT_2 (R, S, T, X, (Q)) 181 # define FP_FMA_D(R, X, Y, Z) _FP_FMA (D, 2, 4, R, X, Y, Z) 182 183 # define FP_CMP_D(r, X, Y, un, ex) _FP_CMP (D, 2, (r), X, Y, (un), (ex)) 184 # define FP_CMP_EQ_D(r, X, Y, ex) _FP_CMP_EQ (D, 2, (r), X, Y, (ex)) 185 # define FP_CMP_UNORD_D(r, X, Y, ex) _FP_CMP_UNORD (D, 2, (r), X, Y, (ex)) 186 187 # define FP_TO_INT_D(r, X, rsz, rsg) _FP_TO_INT (D, 2, (r), X, (rsz), (rsg)) 188 # define FP_TO_INT_ROUND_D(r, X, rsz, rsg) \ 189 _FP_TO_INT_ROUND (D, 2, (r), X, (rsz), (rsg)) 190 # define FP_FROM_INT_D(X, r, rs, rt) _FP_FROM_INT (D, 2, X, (r), (rs), rt) 191 192 # define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_2 (X) 193 # define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_2 (X) 194 195 # define _FP_FRAC_HIGH_DW_D(X) _FP_FRAC_HIGH_4 (X) 196 197 #else 198 199 union _FP_UNION_D 200 { 201 DFtype flt; 202 struct _FP_STRUCT_LAYOUT 203 { 204 # if __BYTE_ORDER == __BIG_ENDIAN 205 unsigned sign : 1; 206 unsigned exp : _FP_EXPBITS_D; 207 _FP_W_TYPE frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0); 208 # else 209 _FP_W_TYPE frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0); 210 unsigned exp : _FP_EXPBITS_D; 211 unsigned sign : 1; 212 # endif 213 } bits __attribute__ ((packed)); 214 }; 215 216 # define FP_DECL_D(X) _FP_DECL (1, X) 217 # define FP_UNPACK_RAW_D(X, val) _FP_UNPACK_RAW_1 (D, X, (val)) 218 # define FP_UNPACK_RAW_DP(X, val) _FP_UNPACK_RAW_1_P (D, X, (val)) 219 # define FP_PACK_RAW_D(val, X) _FP_PACK_RAW_1 (D, (val), X) 220 # define FP_PACK_RAW_DP(val, X) \ 221 do \ 222 { \ 223 if (!FP_INHIBIT_RESULTS) \ 224 _FP_PACK_RAW_1_P (D, (val), X); \ 225 } \ 226 while (0) 227 228 # define FP_UNPACK_D(X, val) \ 229 do \ 230 { \ 231 _FP_UNPACK_RAW_1 (D, X, (val)); \ 232 _FP_UNPACK_CANONICAL (D, 1, X); \ 233 } \ 234 while (0) 235 236 # define FP_UNPACK_DP(X, val) \ 237 do \ 238 { \ 239 _FP_UNPACK_RAW_1_P (D, X, (val)); \ 240 _FP_UNPACK_CANONICAL (D, 1, X); \ 241 } \ 242 while (0) 243 244 # define FP_UNPACK_SEMIRAW_D(X, val) \ 245 do \ 246 { \ 247 _FP_UNPACK_RAW_1 (D, X, (val)); \ 248 _FP_UNPACK_SEMIRAW (D, 1, X); \ 249 } \ 250 while (0) 251 252 # define FP_UNPACK_SEMIRAW_DP(X, val) \ 253 do \ 254 { \ 255 _FP_UNPACK_RAW_1_P (D, X, (val)); \ 256 _FP_UNPACK_SEMIRAW (D, 1, X); \ 257 } \ 258 while (0) 259 260 # define FP_PACK_D(val, X) \ 261 do \ 262 { \ 263 _FP_PACK_CANONICAL (D, 1, X); \ 264 _FP_PACK_RAW_1 (D, (val), X); \ 265 } \ 266 while (0) 267 268 # define FP_PACK_DP(val, X) \ 269 do \ 270 { \ 271 _FP_PACK_CANONICAL (D, 1, X); \ 272 if (!FP_INHIBIT_RESULTS) \ 273 _FP_PACK_RAW_1_P (D, (val), X); \ 274 } \ 275 while (0) 276 277 # define FP_PACK_SEMIRAW_D(val, X) \ 278 do \ 279 { \ 280 _FP_PACK_SEMIRAW (D, 1, X); \ 281 _FP_PACK_RAW_1 (D, (val), X); \ 282 } \ 283 while (0) 284 285 # define FP_PACK_SEMIRAW_DP(val, X) \ 286 do \ 287 { \ 288 _FP_PACK_SEMIRAW (D, 1, X); \ 289 if (!FP_INHIBIT_RESULTS) \ 290 _FP_PACK_RAW_1_P (D, (val), X); \ 291 } \ 292 while (0) 293 294 # define FP_ISSIGNAN_D(X) _FP_ISSIGNAN (D, 1, X) 295 # define FP_NEG_D(R, X) _FP_NEG (D, 1, R, X) 296 # define FP_ADD_D(R, X, Y) _FP_ADD (D, 1, R, X, Y) 297 # define FP_SUB_D(R, X, Y) _FP_SUB (D, 1, R, X, Y) 298 # define FP_MUL_D(R, X, Y) _FP_MUL (D, 1, R, X, Y) 299 # define FP_DIV_D(R, X, Y) _FP_DIV (D, 1, R, X, Y) 300 # define FP_SQRT_D(R, X) _FP_SQRT (D, 1, R, X) 301 # define _FP_SQRT_MEAT_D(R, S, T, X, Q) _FP_SQRT_MEAT_1 (R, S, T, X, (Q)) 302 # define FP_FMA_D(R, X, Y, Z) _FP_FMA (D, 1, 2, R, X, Y, Z) 303 304 /* The implementation of _FP_MUL_D and _FP_DIV_D should be chosen by 305 the target machine. */ 306 307 # define FP_CMP_D(r, X, Y, un, ex) _FP_CMP (D, 1, (r), X, Y, (un), (ex)) 308 # define FP_CMP_EQ_D(r, X, Y, ex) _FP_CMP_EQ (D, 1, (r), X, Y, (ex)) 309 # define FP_CMP_UNORD_D(r, X, Y, ex) _FP_CMP_UNORD (D, 1, (r), X, Y, (ex)) 310 311 # define FP_TO_INT_D(r, X, rsz, rsg) _FP_TO_INT (D, 1, (r), X, (rsz), (rsg)) 312 # define FP_TO_INT_ROUND_D(r, X, rsz, rsg) \ 313 _FP_TO_INT_ROUND (D, 1, (r), X, (rsz), (rsg)) 314 # define FP_FROM_INT_D(X, r, rs, rt) _FP_FROM_INT (D, 1, X, (r), (rs), rt) 315 316 # define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_1 (X) 317 # define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_1 (X) 318 319 # define _FP_FRAC_HIGH_DW_D(X) _FP_FRAC_HIGH_2 (X) 320 321 #endif /* W_TYPE_SIZE < 64 */ 322 323 #endif /* !SOFT_FP_DOUBLE_H */ 324