1 /* $NetBSD: systfloat.c,v 1.6 2002/02/21 07:38:16 itojun Exp $ */ 2 3 /* This is a derivative work. */ 4 5 /*- 6 * Copyright (c) 2001 The NetBSD Foundation, Inc. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to The NetBSD Foundation 10 * by Ross Harvey. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the NetBSD 23 * Foundation, Inc. and its contributors. 24 * 4. Neither the name of The NetBSD Foundation nor the names of its 25 * contributors may be used to endorse or promote products derived 26 * from this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGE. 39 */ 40 41 /* 42 =============================================================================== 43 44 This C source file is part of TestFloat, Release 2a, a package of programs 45 for testing the correctness of floating-point arithmetic complying to the 46 IEC/IEEE Standard for Floating-Point. 47 48 Written by John R. Hauser. More information is available through the Web 49 page `http://HTTP.CS.Berkeley.EDU/~jhauser/arithmetic/TestFloat.html'. 50 51 THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort 52 has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT 53 TIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO 54 PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY 55 AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE. 56 57 Derivative works are acceptable, even for commercial purposes, so long as 58 (1) they include prominent notice that the work is derivative, and (2) they 59 include prominent notice akin to these four paragraphs for those parts of 60 this code that are retained. 61 62 =============================================================================== 63 */ 64 65 #include <sys/cdefs.h> 66 #ifndef __lint 67 __RCSID("$NetBSD: systfloat.c,v 1.6 2002/02/21 07:38:16 itojun Exp $"); 68 #endif 69 70 #include <math.h> 71 #include <ieeefp.h> 72 #include "milieu.h" 73 #include "softfloat.h" 74 #include "systfloat.h" 75 #include "systflags.h" 76 #include "systmodes.h" 77 78 fp_except 79 syst_float_flags_clear(void) 80 { 81 return fpsetsticky(0) 82 & (FP_X_IMP | FP_X_UFL | FP_X_OFL | FP_X_DZ | FP_X_INV); 83 } 84 85 void 86 syst_float_set_rounding_mode(fp_rnd direction) 87 { 88 fpsetround(direction); 89 fpsetmask(0); 90 } 91 92 float32 syst_int32_to_float32( int32 a ) 93 { 94 float32 z; 95 96 *( (float *) &z ) = a; 97 return z; 98 99 } 100 101 float64 syst_int32_to_float64( int32 a ) 102 { 103 float64 z; 104 105 *( (double *) &z ) = a; 106 return z; 107 108 } 109 110 #if defined( FLOATX80 ) && defined( LONG_DOUBLE_IS_FLOATX80 ) 111 112 floatx80 syst_int32_to_floatx80( int32 a ) 113 { 114 floatx80 z; 115 116 *( (long double *) &z ) = a; 117 return z; 118 119 } 120 121 #endif 122 123 #if defined( FLOAT128 ) && defined( LONG_DOUBLE_IS_FLOAT128 ) 124 125 float128 syst_int32_to_float128( int32 a ) 126 { 127 float128 z; 128 129 *( (long double *) &z ) = a; 130 return z; 131 132 } 133 134 #endif 135 136 #ifdef BITS64 137 138 float32 syst_int64_to_float32( int64 a ) 139 { 140 float32 z; 141 142 *( (float *) &z ) = a; 143 return z; 144 145 } 146 147 float64 syst_int64_to_float64( int64 a ) 148 { 149 float64 z; 150 151 *( (double *) &z ) = a; 152 return z; 153 154 } 155 156 #if defined( FLOATX80 ) && defined( LONG_DOUBLE_IS_FLOATX80 ) 157 158 floatx80 syst_int64_to_floatx80( int64 a ) 159 { 160 floatx80 z; 161 162 *( (long double *) &z ) = a; 163 return z; 164 165 } 166 167 #endif 168 169 #if defined( FLOAT128 ) && defined( LONG_DOUBLE_IS_FLOAT128 ) 170 171 float128 syst_int64_to_float128( int64 a ) 172 { 173 float128 z; 174 175 *( (long double *) &z ) = a; 176 return z; 177 178 } 179 180 #endif 181 182 #endif 183 184 int32 syst_float32_to_int32_round_to_zero( float32 a ) 185 { 186 187 return *( (float *) &a ); 188 189 } 190 191 #ifdef BITS64 192 193 int64 syst_float32_to_int64_round_to_zero( float32 a ) 194 { 195 196 return *( (float *) &a ); 197 198 } 199 200 #endif 201 202 float64 syst_float32_to_float64( float32 a ) 203 { 204 float64 z; 205 206 *( (double *) &z ) = *( (float *) &a ); 207 return z; 208 209 } 210 211 #if defined( FLOATX80 ) && defined( LONG_DOUBLE_IS_FLOATX80 ) 212 213 floatx80 syst_float32_to_floatx80( float32 a ) 214 { 215 floatx80 z; 216 217 *( (long double *) &z ) = *( (float *) &a ); 218 return z; 219 220 } 221 222 #endif 223 224 #if defined( FLOAT128 ) && defined( LONG_DOUBLE_IS_FLOAT128 ) 225 226 float128 syst_float32_to_float128( float32 a ) 227 { 228 float128 z; 229 230 *( (long double *) &z ) = *( (float *) &a ); 231 return z; 232 233 } 234 235 #endif 236 237 float32 syst_float32_add( float32 a, float32 b ) 238 { 239 float32 z; 240 241 *( (float *) &z ) = *( (float *) &a ) + *( (float *) &b ); 242 return z; 243 244 } 245 246 float32 syst_float32_sub( float32 a, float32 b ) 247 { 248 float32 z; 249 250 *( (float *) &z ) = *( (float *) &a ) - *( (float *) &b ); 251 return z; 252 253 } 254 255 float32 syst_float32_mul( float32 a, float32 b ) 256 { 257 float32 z; 258 259 *( (float *) &z ) = *( (float *) &a ) * *( (float *) &b ); 260 return z; 261 262 } 263 264 float32 syst_float32_div( float32 a, float32 b ) 265 { 266 float32 z; 267 268 *( (float *) &z ) = *( (float *) &a ) / *( (float *) &b ); 269 return z; 270 271 } 272 273 flag syst_float32_eq( float32 a, float32 b ) 274 { 275 276 return ( *( (float *) &a ) == *( (float *) &b ) ); 277 278 } 279 280 flag syst_float32_le( float32 a, float32 b ) 281 { 282 283 return ( *( (float *) &a ) <= *( (float *) &b ) ); 284 285 } 286 287 flag syst_float32_lt( float32 a, float32 b ) 288 { 289 290 return ( *( (float *) &a ) < *( (float *) &b ) ); 291 292 } 293 294 int32 syst_float64_to_int32_round_to_zero( float64 a ) 295 { 296 297 return *( (double *) &a ); 298 299 } 300 301 #ifdef BITS64 302 303 int64 syst_float64_to_int64_round_to_zero( float64 a ) 304 { 305 306 return *( (double *) &a ); 307 308 } 309 310 #endif 311 312 float32 syst_float64_to_float32( float64 a ) 313 { 314 float32 z; 315 316 *( (float *) &z ) = *( (double *) &a ); 317 return z; 318 319 } 320 321 #if defined( FLOATX80 ) && defined( LONG_DOUBLE_IS_FLOATX80 ) 322 323 floatx80 syst_float64_to_floatx80( float64 a ) 324 { 325 floatx80 z; 326 327 *( (long double *) &z ) = *( (double *) &a ); 328 return z; 329 330 } 331 332 #endif 333 334 #if defined( FLOAT128 ) && defined( LONG_DOUBLE_IS_FLOAT128 ) 335 336 float128 syst_float64_to_float128( float64 a ) 337 { 338 float128 z; 339 340 *( (long double *) &z ) = *( (double *) &a ); 341 return z; 342 343 } 344 345 #endif 346 347 float64 syst_float64_add( float64 a, float64 b ) 348 { 349 float64 z; 350 351 *( (double *) &z ) = *( (double *) &a ) + *( (double *) &b ); 352 return z; 353 354 } 355 356 float64 syst_float64_sub( float64 a, float64 b ) 357 { 358 float64 z; 359 360 *( (double *) &z ) = *( (double *) &a ) - *( (double *) &b ); 361 return z; 362 363 } 364 365 float64 syst_float64_mul( float64 a, float64 b ) 366 { 367 float64 z; 368 369 *( (double *) &z ) = *( (double *) &a ) * *( (double *) &b ); 370 return z; 371 372 } 373 374 float64 syst_float64_div( float64 a, float64 b ) 375 { 376 float64 z; 377 378 *( (double *) &z ) = *( (double *) &a ) / *( (double *) &b ); 379 return z; 380 381 } 382 383 float64 syst_float64_sqrt( float64 a ) 384 { 385 float64 z; 386 387 *( (double *) &z ) = sqrt( *( (double *) &a ) ); 388 return z; 389 390 } 391 392 flag syst_float64_eq( float64 a, float64 b ) 393 { 394 395 return ( *( (double *) &a ) == *( (double *) &b ) ); 396 397 } 398 399 flag syst_float64_le( float64 a, float64 b ) 400 { 401 402 return ( *( (double *) &a ) <= *( (double *) &b ) ); 403 404 } 405 406 flag syst_float64_lt( float64 a, float64 b ) 407 { 408 409 return ( *( (double *) &a ) < *( (double *) &b ) ); 410 411 } 412 413 #if defined( FLOATX80 ) && defined( LONG_DOUBLE_IS_FLOATX80 ) 414 415 int32 syst_floatx80_to_int32_round_to_zero( floatx80 a ) 416 { 417 418 return *( (long double *) &a ); 419 420 } 421 422 #ifdef BITS64 423 424 int64 syst_floatx80_to_int64_round_to_zero( floatx80 a ) 425 { 426 427 return *( (long double *) &a ); 428 429 } 430 431 #endif 432 433 float32 syst_floatx80_to_float32( floatx80 a ) 434 { 435 float32 z; 436 437 *( (float *) &z ) = *( (long double *) &a ); 438 return z; 439 440 } 441 442 float64 syst_floatx80_to_float64( floatx80 a ) 443 { 444 float64 z; 445 446 *( (double *) &z ) = *( (long double *) &a ); 447 return z; 448 449 } 450 451 floatx80 syst_floatx80_add( floatx80 a, floatx80 b ) 452 { 453 floatx80 z; 454 455 *( (long double *) &z ) = 456 *( (long double *) &a ) + *( (long double *) &b ); 457 return z; 458 459 } 460 461 floatx80 syst_floatx80_sub( floatx80 a, floatx80 b ) 462 { 463 floatx80 z; 464 465 *( (long double *) &z ) = 466 *( (long double *) &a ) - *( (long double *) &b ); 467 return z; 468 469 } 470 471 floatx80 syst_floatx80_mul( floatx80 a, floatx80 b ) 472 { 473 floatx80 z; 474 475 *( (long double *) &z ) = 476 *( (long double *) &a ) * *( (long double *) &b ); 477 return z; 478 479 } 480 481 floatx80 syst_floatx80_div( floatx80 a, floatx80 b ) 482 { 483 floatx80 z; 484 485 *( (long double *) &z ) = 486 *( (long double *) &a ) / *( (long double *) &b ); 487 return z; 488 489 } 490 491 flag syst_floatx80_eq( floatx80 a, floatx80 b ) 492 { 493 494 return ( *( (long double *) &a ) == *( (long double *) &b ) ); 495 496 } 497 498 flag syst_floatx80_le( floatx80 a, floatx80 b ) 499 { 500 501 return ( *( (long double *) &a ) <= *( (long double *) &b ) ); 502 503 } 504 505 flag syst_floatx80_lt( floatx80 a, floatx80 b ) 506 { 507 508 return ( *( (long double *) &a ) < *( (long double *) &b ) ); 509 510 } 511 512 #endif 513 514 #if defined( FLOAT128 ) && defined( LONG_DOUBLE_IS_FLOAT128 ) 515 516 int32 syst_float128_to_int32_round_to_zero( float128 a ) 517 { 518 519 return *( (long double *) &a ); 520 521 } 522 523 #ifdef BITS64 524 525 int64 syst_float128_to_int64_round_to_zero( float128 a ) 526 { 527 528 return *( (long double *) &a ); 529 530 } 531 532 #endif 533 534 float32 syst_float128_to_float32( float128 a ) 535 { 536 float32 z; 537 538 *( (float *) &z ) = *( (long double *) &a ); 539 return z; 540 541 } 542 543 float64 syst_float128_to_float64( float128 a ) 544 { 545 float64 z; 546 547 *( (double *) &z ) = *( (long double *) &a ); 548 return z; 549 550 } 551 552 float128 syst_float128_add( float128 a, float128 b ) 553 { 554 float128 z; 555 556 *( (long double *) &z ) = 557 *( (long double *) &a ) + *( (long double *) &b ); 558 return z; 559 560 } 561 562 float128 syst_float128_sub( float128 a, float128 b ) 563 { 564 float128 z; 565 566 *( (long double *) &z ) = 567 *( (long double *) &a ) - *( (long double *) &b ); 568 return z; 569 570 } 571 572 float128 syst_float128_mul( float128 a, float128 b ) 573 { 574 float128 z; 575 576 *( (long double *) &z ) = 577 *( (long double *) &a ) * *( (long double *) &b ); 578 return z; 579 580 } 581 582 float128 syst_float128_div( float128 a, float128 b ) 583 { 584 float128 z; 585 586 *( (long double *) &z ) = 587 *( (long double *) &a ) / *( (long double *) &b ); 588 return z; 589 590 } 591 592 flag syst_float128_eq( float128 a, float128 b ) 593 { 594 595 return ( *( (long double *) &a ) == *( (long double *) &b ) ); 596 597 } 598 599 flag syst_float128_le( float128 a, float128 b ) 600 { 601 602 return ( *( (long double *) &a ) <= *( (long double *) &b ) ); 603 604 } 605 606 flag syst_float128_lt( float128 a, float128 b ) 607 { 608 609 return ( *( (long double *) &a ) < *( (long double *) &b ) ); 610 611 } 612 613 #endif 614 615