1 /* 2 * Linux/PA-RISC Project (http://www.parisc-linux.org/) 3 * 4 * Floating-point emulation code 5 * Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 */ 21 /* 22 * BEGIN_DESC 23 * 24 * File: 25 * @(#) pa/spmath/float.h $Revision: 1.1 $ 26 * 27 * Purpose: 28 * <<please update with a synopis of the functionality provided by this file>> 29 * 30 * BE header: no 31 * 32 * Shipped: yes 33 * /usr/conf/pa/spmath/float.h 34 * 35 * END_DESC 36 */ 37 38 #ifdef __NO_PA_HDRS 39 PA header file -- do not include this header file for non-PA builds. 40 #endif 41 42 #include "fpbits.h" 43 #include "hppa.h" 44 /* 45 * Want to pick up the FPU capability flags, not the PDC structures. 46 * 'LOCORE' isn't really true in this case, but we don't want the C structures 47 * so it suits our purposes 48 */ 49 #define LOCORE 50 #include "fpu.h" 51 52 /* 53 * Declare the basic structures for the 3 different 54 * floating-point precisions. 55 * 56 * Single number 57 * +-------+-------+-------+-------+-------+-------+-------+-------+ 58 * |s| exp | mantissa | 59 * +-------+-------+-------+-------+-------+-------+-------+-------+ 60 */ 61 #define Sall(object) (object) 62 #define Ssign(object) Bitfield_extract( 0, 1,object) 63 #define Ssignedsign(object) Bitfield_signed_extract( 0, 1,object) 64 #define Sexponent(object) Bitfield_extract( 1, 8,object) 65 #define Smantissa(object) Bitfield_mask( 9, 23,object) 66 #define Ssignaling(object) Bitfield_extract( 9, 1,object) 67 #define Ssignalingnan(object) Bitfield_extract( 1, 9,object) 68 #define Shigh2mantissa(object) Bitfield_extract( 9, 2,object) 69 #define Sexponentmantissa(object) Bitfield_mask( 1, 31,object) 70 #define Ssignexponent(object) Bitfield_extract( 0, 9,object) 71 #define Shidden(object) Bitfield_extract( 8, 1,object) 72 #define Shiddenoverflow(object) Bitfield_extract( 7, 1,object) 73 #define Shiddenhigh7mantissa(object) Bitfield_extract( 8, 8,object) 74 #define Shiddenhigh3mantissa(object) Bitfield_extract( 8, 4,object) 75 #define Slow(object) Bitfield_mask( 31, 1,object) 76 #define Slow4(object) Bitfield_mask( 28, 4,object) 77 #define Slow31(object) Bitfield_mask( 1, 31,object) 78 #define Shigh31(object) Bitfield_extract( 0, 31,object) 79 #define Ssignedhigh31(object) Bitfield_signed_extract( 0, 31,object) 80 #define Shigh4(object) Bitfield_extract( 0, 4,object) 81 #define Sbit24(object) Bitfield_extract( 24, 1,object) 82 #define Sbit28(object) Bitfield_extract( 28, 1,object) 83 #define Sbit29(object) Bitfield_extract( 29, 1,object) 84 #define Sbit30(object) Bitfield_extract( 30, 1,object) 85 #define Sbit31(object) Bitfield_mask( 31, 1,object) 86 87 #define Deposit_ssign(object,value) Bitfield_deposit(value,0,1,object) 88 #define Deposit_sexponent(object,value) Bitfield_deposit(value,1,8,object) 89 #define Deposit_smantissa(object,value) Bitfield_deposit(value,9,23,object) 90 #define Deposit_shigh2mantissa(object,value) Bitfield_deposit(value,9,2,object) 91 #define Deposit_sexponentmantissa(object,value) \ 92 Bitfield_deposit(value,1,31,object) 93 #define Deposit_ssignexponent(object,value) Bitfield_deposit(value,0,9,object) 94 #define Deposit_slow(object,value) Bitfield_deposit(value,31,1,object) 95 #define Deposit_shigh4(object,value) Bitfield_deposit(value,0,4,object) 96 97 #define Is_ssign(object) Bitfield_mask( 0, 1,object) 98 #define Is_ssignaling(object) Bitfield_mask( 9, 1,object) 99 #define Is_shidden(object) Bitfield_mask( 8, 1,object) 100 #define Is_shiddenoverflow(object) Bitfield_mask( 7, 1,object) 101 #define Is_slow(object) Bitfield_mask( 31, 1,object) 102 #define Is_sbit24(object) Bitfield_mask( 24, 1,object) 103 #define Is_sbit28(object) Bitfield_mask( 28, 1,object) 104 #define Is_sbit29(object) Bitfield_mask( 29, 1,object) 105 #define Is_sbit30(object) Bitfield_mask( 30, 1,object) 106 #define Is_sbit31(object) Bitfield_mask( 31, 1,object) 107 108 /* 109 * Double number. 110 * +-------+-------+-------+-------+-------+-------+-------+-------+ 111 * |s| exponent | mantissa part 1 | 112 * +-------+-------+-------+-------+-------+-------+-------+-------+ 113 * 114 * +-------+-------+-------+-------+-------+-------+-------+-------+ 115 * | mantissa part 2 | 116 * +-------+-------+-------+-------+-------+-------+-------+-------+ 117 */ 118 #define Dallp1(object) (object) 119 #define Dsign(object) Bitfield_extract( 0, 1,object) 120 #define Dsignedsign(object) Bitfield_signed_extract( 0, 1,object) 121 #define Dexponent(object) Bitfield_extract( 1, 11,object) 122 #define Dmantissap1(object) Bitfield_mask( 12, 20,object) 123 #define Dsignaling(object) Bitfield_extract( 12, 1,object) 124 #define Dsignalingnan(object) Bitfield_extract( 1, 12,object) 125 #define Dhigh2mantissa(object) Bitfield_extract( 12, 2,object) 126 #define Dexponentmantissap1(object) Bitfield_mask( 1, 31,object) 127 #define Dsignexponent(object) Bitfield_extract( 0, 12,object) 128 #define Dhidden(object) Bitfield_extract( 11, 1,object) 129 #define Dhiddenoverflow(object) Bitfield_extract( 10, 1,object) 130 #define Dhiddenhigh7mantissa(object) Bitfield_extract( 11, 8,object) 131 #define Dhiddenhigh3mantissa(object) Bitfield_extract( 11, 4,object) 132 #define Dlowp1(object) Bitfield_mask( 31, 1,object) 133 #define Dlow31p1(object) Bitfield_mask( 1, 31,object) 134 #define Dhighp1(object) Bitfield_extract( 0, 1,object) 135 #define Dhigh4p1(object) Bitfield_extract( 0, 4,object) 136 #define Dhigh31p1(object) Bitfield_extract( 0, 31,object) 137 #define Dsignedhigh31p1(object) Bitfield_signed_extract( 0, 31,object) 138 #define Dbit3p1(object) Bitfield_extract( 3, 1,object) 139 140 #define Deposit_dsign(object,value) Bitfield_deposit(value,0,1,object) 141 #define Deposit_dexponent(object,value) Bitfield_deposit(value,1,11,object) 142 #define Deposit_dmantissap1(object,value) Bitfield_deposit(value,12,20,object) 143 #define Deposit_dhigh2mantissa(object,value) Bitfield_deposit(value,12,2,object) 144 #define Deposit_dexponentmantissap1(object,value) \ 145 Bitfield_deposit(value,1,31,object) 146 #define Deposit_dsignexponent(object,value) Bitfield_deposit(value,0,12,object) 147 #define Deposit_dlowp1(object,value) Bitfield_deposit(value,31,1,object) 148 #define Deposit_dhigh4p1(object,value) Bitfield_deposit(value,0,4,object) 149 150 #define Is_dsign(object) Bitfield_mask( 0, 1,object) 151 #define Is_dsignaling(object) Bitfield_mask( 12, 1,object) 152 #define Is_dhidden(object) Bitfield_mask( 11, 1,object) 153 #define Is_dhiddenoverflow(object) Bitfield_mask( 10, 1,object) 154 #define Is_dlowp1(object) Bitfield_mask( 31, 1,object) 155 #define Is_dhighp1(object) Bitfield_mask( 0, 1,object) 156 #define Is_dbit3p1(object) Bitfield_mask( 3, 1,object) 157 158 #define Dallp2(object) (object) 159 #define Dmantissap2(object) (object) 160 #define Dlowp2(object) Bitfield_mask( 31, 1,object) 161 #define Dlow4p2(object) Bitfield_mask( 28, 4,object) 162 #define Dlow31p2(object) Bitfield_mask( 1, 31,object) 163 #define Dhighp2(object) Bitfield_extract( 0, 1,object) 164 #define Dhigh31p2(object) Bitfield_extract( 0, 31,object) 165 #define Dbit2p2(object) Bitfield_extract( 2, 1,object) 166 #define Dbit3p2(object) Bitfield_extract( 3, 1,object) 167 #define Dbit21p2(object) Bitfield_extract( 21, 1,object) 168 #define Dbit28p2(object) Bitfield_extract( 28, 1,object) 169 #define Dbit29p2(object) Bitfield_extract( 29, 1,object) 170 #define Dbit30p2(object) Bitfield_extract( 30, 1,object) 171 #define Dbit31p2(object) Bitfield_mask( 31, 1,object) 172 173 #define Deposit_dlowp2(object,value) Bitfield_deposit(value,31,1,object) 174 175 #define Is_dlowp2(object) Bitfield_mask( 31, 1,object) 176 #define Is_dhighp2(object) Bitfield_mask( 0, 1,object) 177 #define Is_dbit2p2(object) Bitfield_mask( 2, 1,object) 178 #define Is_dbit3p2(object) Bitfield_mask( 3, 1,object) 179 #define Is_dbit21p2(object) Bitfield_mask( 21, 1,object) 180 #define Is_dbit28p2(object) Bitfield_mask( 28, 1,object) 181 #define Is_dbit29p2(object) Bitfield_mask( 29, 1,object) 182 #define Is_dbit30p2(object) Bitfield_mask( 30, 1,object) 183 #define Is_dbit31p2(object) Bitfield_mask( 31, 1,object) 184 185 /* 186 * Quad number. 187 * +-------+-------+-------+-------+-------+-------+-------+-------+ 188 * |s| exponent | mantissa part 1 | 189 * +-------+-------+-------+-------+-------+-------+-------+-------+ 190 * 191 * +-------+-------+-------+-------+-------+-------+-------+-------+ 192 * | mantissa part 2 | 193 * +-------+-------+-------+-------+-------+-------+-------+-------+ 194 * 195 * +-------+-------+-------+-------+-------+-------+-------+-------+ 196 * | mantissa part 3 | 197 * +-------+-------+-------+-------+-------+-------+-------+-------+ 198 * 199 * +-------+-------+-------+-------+-------+-------+-------+-------+ 200 * | mantissa part 4 | 201 * +-------+-------+-------+-------+-------+-------+-------+-------+ 202 */ 203 typedef struct 204 { 205 union 206 { 207 struct { unsigned qallp1; } u_qallp1; 208 /* Not needed for now... 209 Bitfield_extract( 0, 1,u_qsign,qsign) 210 Bitfield_signed_extract( 0, 1,u_qsignedsign,qsignedsign) 211 Bitfield_extract( 1, 15,u_qexponent,qexponent) 212 Bitfield_extract(16, 16,u_qmantissap1,qmantissap1) 213 Bitfield_extract(16, 1,u_qsignaling,qsignaling) 214 Bitfield_extract(1, 16,u_qsignalingnan,qsignalingnan) 215 Bitfield_extract(16, 2,u_qhigh2mantissa,qhigh2mantissa) 216 Bitfield_extract( 1, 31,u_qexponentmantissap1,qexponentmantissap1) 217 Bitfield_extract( 0, 16,u_qsignexponent,qsignexponent) 218 Bitfield_extract(15, 1,u_qhidden,qhidden) 219 Bitfield_extract(14, 1,u_qhiddenoverflow,qhiddenoverflow) 220 Bitfield_extract(15, 8,u_qhiddenhigh7mantissa,qhiddenhigh7mantissa) 221 Bitfield_extract(15, 4,u_qhiddenhigh3mantissa,qhiddenhigh3mantissa) 222 Bitfield_extract(31, 1,u_qlowp1,qlowp1) 223 Bitfield_extract( 1, 31,u_qlow31p1,qlow31p1) 224 Bitfield_extract( 0, 1,u_qhighp1,qhighp1) 225 Bitfield_extract( 0, 4,u_qhigh4p1,qhigh4p1) 226 Bitfield_extract( 0, 31,u_qhigh31p1,qhigh31p1) 227 */ 228 } quad_u1; 229 union 230 { 231 struct { unsigned qallp2; } u_qallp2; 232 /* Not needed for now... 233 Bitfield_extract(31, 1,u_qlowp2,qlowp2) 234 Bitfield_extract( 1, 31,u_qlow31p2,qlow31p2) 235 Bitfield_extract( 0, 1,u_qhighp2,qhighp2) 236 Bitfield_extract( 0, 31,u_qhigh31p2,qhigh31p2) 237 */ 238 } quad_u2; 239 union 240 { 241 struct { unsigned qallp3; } u_qallp3; 242 /* Not needed for now... 243 Bitfield_extract(31, 1,u_qlowp3,qlowp3) 244 Bitfield_extract( 1, 31,u_qlow31p3,qlow31p3) 245 Bitfield_extract( 0, 1,u_qhighp3,qhighp3) 246 Bitfield_extract( 0, 31,u_qhigh31p3,qhigh31p3) 247 */ 248 } quad_u3; 249 union 250 { 251 struct { unsigned qallp4; } u_qallp4; 252 /* Not need for now... 253 Bitfield_extract(31, 1,u_qlowp4,qlowp4) 254 Bitfield_extract( 1, 31,u_qlow31p4,qlow31p4) 255 Bitfield_extract( 0, 1,u_qhighp4,qhighp4) 256 Bitfield_extract( 0, 31,u_qhigh31p4,qhigh31p4) 257 */ 258 } quad_u4; 259 } quad_floating_point; 260 261 /* Extension - An additional structure to hold the guard, round and 262 * sticky bits during computations. 263 */ 264 #define Extall(object) (object) 265 #define Extsign(object) Bitfield_extract( 0, 1,object) 266 #define Exthigh31(object) Bitfield_extract( 0, 31,object) 267 #define Extlow31(object) Bitfield_extract( 1, 31,object) 268 #define Extlow(object) Bitfield_extract( 31, 1,object) 269 270 /* 271 * Single extended - The upper word is just like single precision, 272 * but one additional word of mantissa is needed. 273 */ 274 #define Sextallp1(object) (object) 275 #define Sextallp2(object) (object) 276 #define Sextlowp1(object) Bitfield_extract( 31, 1,object) 277 #define Sexthighp2(object) Bitfield_extract( 0, 1,object) 278 #define Sextlow31p2(object) Bitfield_extract( 1, 31,object) 279 #define Sexthiddenoverflow(object) Bitfield_extract( 4, 1,object) 280 #define Is_sexthiddenoverflow(object) Bitfield_mask( 4, 1,object) 281 282 /* 283 * Double extended - The upper two words are just like double precision, 284 * but two additional words of mantissa are needed. 285 */ 286 #define Dextallp1(object) (object) 287 #define Dextallp2(object) (object) 288 #define Dextallp3(object) (object) 289 #define Dextallp4(object) (object) 290 #define Dextlowp2(object) Bitfield_extract( 31, 1,object) 291 #define Dexthighp3(object) Bitfield_extract( 0, 1,object) 292 #define Dextlow31p3(object) Bitfield_extract( 1, 31,object) 293 #define Dexthiddenoverflow(object) Bitfield_extract( 10, 1,object) 294 #define Is_dexthiddenoverflow(object) Bitfield_mask( 10, 1,object) 295 #define Deposit_dextlowp4(object,value) Bitfield_deposit(value,31,1,object) 296 297 /* 298 * Declare the basic structures for the 3 different 299 * fixed-point precisions. 300 * 301 * Single number 302 * +-------+-------+-------+-------+-------+-------+-------+-------+ 303 * |s| integer | 304 * +-------+-------+-------+-------+-------+-------+-------+-------+ 305 */ 306 typedef int sgl_integer; 307 308 /* 309 * Double number. 310 * +-------+-------+-------+-------+-------+-------+-------+-------+ 311 * |s| high integer | 312 * +-------+-------+-------+-------+-------+-------+-------+-------+ 313 * 314 * +-------+-------+-------+-------+-------+-------+-------+-------+ 315 * | low integer | 316 * +-------+-------+-------+-------+-------+-------+-------+-------+ 317 */ 318 struct dint { 319 int wd0; 320 unsigned int wd1; 321 }; 322 323 struct dblwd { 324 unsigned int wd0; 325 unsigned int wd1; 326 }; 327 328 /* 329 * Quad number. 330 * +-------+-------+-------+-------+-------+-------+-------+-------+ 331 * |s| integer part1 | 332 * +-------+-------+-------+-------+-------+-------+-------+-------+ 333 * 334 * +-------+-------+-------+-------+-------+-------+-------+-------+ 335 * | integer part 2 | 336 * +-------+-------+-------+-------+-------+-------+-------+-------+ 337 * 338 * +-------+-------+-------+-------+-------+-------+-------+-------+ 339 * | integer part 3 | 340 * +-------+-------+-------+-------+-------+-------+-------+-------+ 341 * 342 * +-------+-------+-------+-------+-------+-------+-------+-------+ 343 * | integer part 4 | 344 * +-------+-------+-------+-------+-------+-------+-------+-------+ 345 */ 346 347 struct quadwd { 348 int wd0; 349 unsigned int wd1; 350 unsigned int wd2; 351 unsigned int wd3; 352 }; 353 354 typedef struct quadwd quad_integer; 355 356 357 /* useful typedefs */ 358 typedef unsigned int sgl_floating_point; 359 typedef struct dblwd dbl_floating_point; 360 typedef struct dint dbl_integer; 361 typedef struct dblwd dbl_unsigned; 362 363 /* 364 * Define the different precisions' parameters. 365 */ 366 #define SGL_BITLENGTH 32 367 #define SGL_EMAX 127 368 #define SGL_EMIN (-126) 369 #define SGL_BIAS 127 370 #define SGL_WRAP 192 371 #define SGL_INFINITY_EXPONENT (SGL_EMAX+SGL_BIAS+1) 372 #define SGL_THRESHOLD 32 373 #define SGL_EXP_LENGTH 8 374 #define SGL_P 24 375 376 #define DBL_BITLENGTH 64 377 #define DBL_EMAX 1023 378 #define DBL_EMIN (-1022) 379 #define DBL_BIAS 1023 380 #define DBL_WRAP 1536 381 #define DBL_INFINITY_EXPONENT (DBL_EMAX+DBL_BIAS+1) 382 #define DBL_THRESHOLD 64 383 #define DBL_EXP_LENGTH 11 384 #define DBL_P 53 385 386 #define QUAD_BITLENGTH 128 387 #define QUAD_EMAX 16383 388 #define QUAD_EMIN (-16382) 389 #define QUAD_BIAS 16383 390 #define QUAD_WRAP 24576 391 #define QUAD_INFINITY_EXPONENT (QUAD_EMAX+QUAD_BIAS+1) 392 #define QUAD_P 113 393 394 /* Boolean Values etc. */ 395 #define FALSE 0 396 #define TRUE (!FALSE) 397 #define NOT ! 398 #define XOR ^ 399 400 /* other constants */ 401 #undef NULL 402 #define NULL 0 403 #define NIL 0 404 #define SGL 0 405 #define DBL 1 406 #define BADFMT 2 407 #define QUAD 3 408 409 410 /* Types */ 411 typedef int boolean; 412 typedef int FORMAT; 413 typedef int VOID; 414 415 416 /* Declare status register equivalent to FPUs architecture. 417 * 418 * 0 1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 920 1 2 3 4 5 6 7 8 930 1 419 * +-------+-------+-------+-------+-------+-------+-------+-------+ 420 * |V|Z|O|U|I|C| rsv | model | version |RM |rsv|T|r|V|Z|O|U|I| 421 * +-------+-------+-------+-------+-------+-------+-------+-------+ 422 */ 423 #define Cbit(object) Bitfield_extract( 5, 1,object) 424 #define Tbit(object) Bitfield_extract( 25, 1,object) 425 #define Roundingmode(object) Bitfield_extract( 21, 2,object) 426 #define Invalidtrap(object) Bitfield_extract( 27, 1,object) 427 #define Divisionbyzerotrap(object) Bitfield_extract( 28, 1,object) 428 #define Overflowtrap(object) Bitfield_extract( 29, 1,object) 429 #define Underflowtrap(object) Bitfield_extract( 30, 1,object) 430 #define Inexacttrap(object) Bitfield_extract( 31, 1,object) 431 #define Invalidflag(object) Bitfield_extract( 0, 1,object) 432 #define Divisionbyzeroflag(object) Bitfield_extract( 1, 1,object) 433 #define Overflowflag(object) Bitfield_extract( 2, 1,object) 434 #define Underflowflag(object) Bitfield_extract( 3, 1,object) 435 #define Inexactflag(object) Bitfield_extract( 4, 1,object) 436 #define Allflags(object) Bitfield_extract( 0, 5,object) 437 438 /* Definitions relevant to the status register */ 439 440 /* Rounding Modes */ 441 #define ROUNDNEAREST 0 442 #define ROUNDZERO 1 443 #define ROUNDPLUS 2 444 #define ROUNDMINUS 3 445 446 /* Exceptions */ 447 #define NOEXCEPTION 0x0 448 #define INVALIDEXCEPTION 0x20 449 #define DIVISIONBYZEROEXCEPTION 0x10 450 #define OVERFLOWEXCEPTION 0x08 451 #define UNDERFLOWEXCEPTION 0x04 452 #define INEXACTEXCEPTION 0x02 453 #define UNIMPLEMENTEDEXCEPTION 0x01 454 455 /* New exceptions for the 2E Opcode */ 456 #define OPC_2E_INVALIDEXCEPTION 0x30 457 #define OPC_2E_OVERFLOWEXCEPTION 0x18 458 #define OPC_2E_UNDERFLOWEXCEPTION 0x0c 459 #define OPC_2E_INEXACTEXCEPTION 0x12 460 461 /* Declare exception registers equivalent to FPUs architecture 462 * 463 * 0 1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 920 1 2 3 4 5 6 7 8 930 1 464 * +-------+-------+-------+-------+-------+-------+-------+-------+ 465 * |excepttype | r1 | r2/ext | operation |parm |n| t/cond | 466 * +-------+-------+-------+-------+-------+-------+-------+-------+ 467 */ 468 #define Allexception(object) (object) 469 #define Exceptiontype(object) Bitfield_extract( 0, 6,object) 470 #define Instructionfield(object) Bitfield_mask( 6,26,object) 471 #define Parmfield(object) Bitfield_extract( 23, 3,object) 472 #define Rabit(object) Bitfield_extract( 24, 1,object) 473 #define Ibit(object) Bitfield_extract( 25, 1,object) 474 475 #define Set_exceptiontype(object,value) Bitfield_deposit(value, 0, 6,object) 476 #define Set_parmfield(object,value) Bitfield_deposit(value, 23, 3,object) 477 #define Set_exceptiontype_and_instr_field(exception,instruction,object) \ 478 object = exception << 26 | instruction 479 480 /* Declare the condition field 481 * 482 * 0 1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 920 1 2 3 4 5 6 7 8 930 1 483 * +-------+-------+-------+-------+-------+-------+-------+-------+ 484 * | |G|L|E|U|X| 485 * +-------+-------+-------+-------+-------+-------+-------+-------+ 486 */ 487 #define Allexception(object) (object) 488 #define Greaterthanbit(object) Bitfield_extract( 27, 1,object) 489 #define Lessthanbit(object) Bitfield_extract( 28, 1,object) 490 #define Equalbit(object) Bitfield_extract( 29, 1,object) 491 #define Unorderedbit(object) Bitfield_extract( 30, 1,object) 492 #define Exceptionbit(object) Bitfield_extract( 31, 1,object) 493 494 /* An alias name for the status register */ 495 #define Fpustatus_register (*status) 496 497 /************************************************** 498 * Status register referencing and manipulation. * 499 **************************************************/ 500 501 /* Rounding mode */ 502 #define Rounding_mode() Roundingmode(Fpustatus_register) 503 #define Is_rounding_mode(rmode) \ 504 (Roundingmode(Fpustatus_register) == rmode) 505 #define Set_rounding_mode(value) \ 506 Bitfield_deposit(value,21,2,Fpustatus_register) 507 508 /* Boolean testing of the trap enable bits */ 509 #define Is_invalidtrap_enabled() Invalidtrap(Fpustatus_register) 510 #define Is_divisionbyzerotrap_enabled() Divisionbyzerotrap(Fpustatus_register) 511 #define Is_overflowtrap_enabled() Overflowtrap(Fpustatus_register) 512 #define Is_underflowtrap_enabled() Underflowtrap(Fpustatus_register) 513 #define Is_inexacttrap_enabled() Inexacttrap(Fpustatus_register) 514 515 /* Set the indicated flags in the status register */ 516 #define Set_invalidflag() Bitfield_deposit(1,0,1,Fpustatus_register) 517 #define Set_divisionbyzeroflag() Bitfield_deposit(1,1,1,Fpustatus_register) 518 #define Set_overflowflag() Bitfield_deposit(1,2,1,Fpustatus_register) 519 #define Set_underflowflag() Bitfield_deposit(1,3,1,Fpustatus_register) 520 #define Set_inexactflag() Bitfield_deposit(1,4,1,Fpustatus_register) 521 522 #define Clear_all_flags() Bitfield_deposit(0,0,5,Fpustatus_register) 523 524 /* Manipulate the trap and condition code bits (tbit and cbit) */ 525 #define Set_tbit() Bitfield_deposit(1,25,1,Fpustatus_register) 526 #define Clear_tbit() Bitfield_deposit(0,25,1,Fpustatus_register) 527 #define Is_tbit_set() Tbit(Fpustatus_register) 528 #define Is_cbit_set() Cbit(Fpustatus_register) 529 530 #define Set_status_cbit(value) \ 531 Bitfield_deposit(value,5,1,Fpustatus_register) 532 533 /******************************* 534 * Condition field referencing * 535 *******************************/ 536 #define Unordered(cond) Unorderedbit(cond) 537 #define Equal(cond) Equalbit(cond) 538 #define Lessthan(cond) Lessthanbit(cond) 539 #define Greaterthan(cond) Greaterthanbit(cond) 540 #define Exception(cond) Exceptionbit(cond) 541 542 543 /* Defines for the extension */ 544 #define Ext_isone_sign(extent) (Extsign(extent)) 545 #define Ext_isnotzero(extent) \ 546 (Extall(extent)) 547 #define Ext_isnotzero_lower(extent) \ 548 (Extlow31(extent)) 549 #define Ext_leftshiftby1(extent) \ 550 Extall(extent) <<= 1 551 #define Ext_negate(extent) \ 552 (int )Extall(extent) = 0 - (int )Extall(extent) 553 #define Ext_setone_low(extent) Bitfield_deposit(1,31,1,extent) 554 #define Ext_setzero(extent) Extall(extent) = 0 555 556 typedef int operation; 557 558 /* error messages */ 559 560 #define NONE 0 561 #define UNDEFFPINST 1 562 563 /* Function definitions: opcode, opclass */ 564 #define FTEST (1<<2) | 0 565 #define FCPY (2<<2) | 0 566 #define FABS (3<<2) | 0 567 #define FSQRT (4<<2) | 0 568 #define FRND (5<<2) | 0 569 570 #define FCNVFF (0<<2) | 1 571 #define FCNVXF (1<<2) | 1 572 #define FCNVFX (2<<2) | 1 573 #define FCNVFXT (3<<2) | 1 574 575 #define FCMP (0<<2) | 2 576 577 #define FADD (0<<2) | 3 578 #define FSUB (1<<2) | 3 579 #define FMPY (2<<2) | 3 580 #define FDIV (3<<2) | 3 581 #define FREM (4<<2) | 3 582 583