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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 */ 203typedef 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 */ 306typedef int sgl_integer; 307 308/* 309 * Double number. 310 * +-------+-------+-------+-------+-------+-------+-------+-------+ 311 * |s| high integer | 312 * +-------+-------+-------+-------+-------+-------+-------+-------+ 313 * 314 * +-------+-------+-------+-------+-------+-------+-------+-------+ 315 * | low integer | 316 * +-------+-------+-------+-------+-------+-------+-------+-------+ 317 */ 318struct dint { 319 int wd0; 320 unsigned int wd1; 321}; 322 323struct 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 347struct quadwd { 348 int wd0; 349 unsigned int wd1; 350 unsigned int wd2; 351 unsigned int wd3; 352}; 353 354typedef struct quadwd quad_integer; 355 356 357/* useful typedefs */ 358typedef unsigned int sgl_floating_point; 359typedef struct dblwd dbl_floating_point; 360typedef struct dint dbl_integer; 361typedef 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 */ 411typedef int boolean; 412typedef int FORMAT; 413typedef 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 556typedef 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