fpu/softfloat.h

   1 /*
   2  * QEMU float support
   3  *
   4  * Derived from SoftFloat.
   5  */
   6
   7 /*============================================================================
   8
   9 This C header file is part of the SoftFloat IEC/IEEE Floating-point Arithmetic
  10 Package, Release 2b.
  11
  12 Written by John R. Hauser.  This work was made possible in part by the
  13 International Computer Science Institute, located at Suite 600, 1947 Center
  14 Street, Berkeley, California 94704.  Funding was partially provided by the
  15 National Science Foundation under grant MIP-9311980.  The original version
  16 of this code was written as part of a project to build a fixed-point vector
  17 processor in collaboration with the University of California at Berkeley,
  18 overseen by Profs. Nelson Morgan and John Wawrzynek.  More information
  19 is available through the Web page `http://www.cs.berkeley.edu/~jhauser/
  20 arithmetic/SoftFloat.html'.
  21
  22 THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE.  Although reasonable effort has
  23 been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT TIMES
  24 RESULT IN INCORRECT BEHAVIOR.  USE OF THIS SOFTWARE IS RESTRICTED TO PERSONS
  25 AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ALL LOSSES,
  26 COSTS, OR OTHER PROBLEMS THEY INCUR DUE TO THE SOFTWARE, AND WHO FURTHERMORE
  27 EFFECTIVELY INDEMNIFY JOHN HAUSER AND THE INTERNATIONAL COMPUTER SCIENCE
  28 INSTITUTE (possibly via similar legal warning) AGAINST ALL LOSSES, COSTS, OR
  29 OTHER PROBLEMS INCURRED BY THEIR CUSTOMERS AND CLIENTS DUE TO THE SOFTWARE.
  30
  31 Derivative works are acceptable, even for commercial purposes, so long as
  32 (1) the source code for the derivative work includes prominent notice that
  33 the work is derivative, and (2) the source code includes prominent notice with
  34 these four paragraphs for those parts of this code that are retained.
  35
  36 =============================================================================*/
  37
  38 #ifndef SOFTFLOAT_H
  39 #define SOFTFLOAT_H
  40
  41 #if defined(CONFIG_SOLARIS) && defined(CONFIG_NEEDS_LIBSUNMATH)
  42 #include <sunmath.h>
  43 #endif
  44
  45 #include <inttypes.h>
  46 #include "config.h"
  47
  48 /*----------------------------------------------------------------------------
  49 | Each of the following `typedef's defines the most convenient type that holds
  50 | integers of at least as many bits as specified.  For example, `uint8' should
  51 | be the most convenient type that can hold unsigned integers of as many as
  52 | 8 bits.  The `flag' type must be able to hold either a 0 or 1.  For most
  53 | implementations of C, `flag', `uint8', and `int8' should all be `typedef'ed
  54 | to the same as `int'.
  55 *----------------------------------------------------------------------------*/
  56 typedef uint8_t flag;
  57 typedef uint8_t uint8;
  58 typedef int8_t int8;
  59 #ifndef _AIX
  60 typedef int uint16;
  61 typedef int int16;
  62 #endif
  63 typedef unsigned int uint32;
  64 typedef signed int int32;
  65 typedef uint64_t uint64;
  66 typedef int64_t int64;
  67
  68 /*----------------------------------------------------------------------------
  69 | Each of the following `typedef's defines a type that holds integers
  70 | of _exactly_ the number of bits specified.  For instance, for most
  71 | implementation of C, `bits16' and `sbits16' should be `typedef'ed to
  72 | `unsigned short int' and `signed short int' (or `short int'), respectively.
  73 *----------------------------------------------------------------------------*/
  74 typedef uint8_t bits8;
  75 typedef int8_t sbits8;
  76 typedef uint16_t bits16;
  77 typedef int16_t sbits16;
  78 typedef uint32_t bits32;
  79 typedef int32_t sbits32;
  80 typedef uint64_t bits64;
  81 typedef int64_t sbits64;
  82
  83 #define LIT64( a ) a##LL
  84 #define INLINE static inline
  85
  86 #if defined(TARGET_MIPS) || defined(TARGET_SH4)
  87 #define SNAN_BIT_IS_ONE         1
  88 #else
  89 #define SNAN_BIT_IS_ONE         0
  90 #endif
  91
  92 /*----------------------------------------------------------------------------
  93 | The macro `FLOATX80' must be defined to enable the extended double-precision
  94 | floating-point format `floatx80'.  If this macro is not defined, the
  95 | `floatx80' type will not be defined, and none of the functions that either
  96 | input or output the `floatx80' type will be defined.  The same applies to
  97 | the `FLOAT128' macro and the quadruple-precision format `float128'.
  98 *----------------------------------------------------------------------------*/
  99 #ifdef CONFIG_SOFTFLOAT
 100 /* bit exact soft float support */
 101 #define FLOATX80
 102 #define FLOAT128
 103 #else
 104 /* native float support */
 105 #if (defined(__i386__) || defined(__x86_64__)) && !defined(CONFIG_BSD)
 106 #define FLOATX80
 107 #endif
 108 #endif /* !CONFIG_SOFTFLOAT */
 109
 110 #define STATUS_PARAM , float_status *status
 111 #define STATUS(field) status->field
 112 #define STATUS_VAR , status
 113
 114 /*----------------------------------------------------------------------------
 115 | Software IEC/IEEE floating-point ordering relations
 116 *----------------------------------------------------------------------------*/
 117 enum {
 118     float_relation_less      = -1,
 119     float_relation_equal     =  0,
 120     float_relation_greater   =  1,
 121     float_relation_unordered =  2
 122 };
 123
 124 #ifdef CONFIG_SOFTFLOAT
 125 /*----------------------------------------------------------------------------
 126 | Software IEC/IEEE floating-point types.
 127 *----------------------------------------------------------------------------*/
 128 /* Use structures for soft-float types.  This prevents accidentally mixing
 129    them with native int/float types.  A sufficiently clever compiler and
 130    sane ABI should be able to see though these structs.  However
 131    x86/gcc 3.x seems to struggle a bit, so leave them disabled by default.  */
 132 //#define USE_SOFTFLOAT_STRUCT_TYPES
 133 #ifdef USE_SOFTFLOAT_STRUCT_TYPES
 134 typedef struct {
 135     uint16_t v;
 136 } float16;
 137 #define float16_val(x) (((float16)(x)).v)
 138 #define make_float16(x) __extension__ ({ float16 f16_val = {x}; f16_val; })
 139 #define const_float16(x) { x }
 140 typedef struct {
 141     uint32_t v;
 142 } float32;
 143 /* The cast ensures an error if the wrong type is passed.  */
 144 #define float32_val(x) (((float32)(x)).v)
 145 #define make_float32(x) __extension__ ({ float32 f32_val = {x}; f32_val; })
 146 #define const_float32(x) { x }
 147 typedef struct {
 148     uint64_t v;
 149 } float64;
 150 #define float64_val(x) (((float64)(x)).v)
 151 #define make_float64(x) __extension__ ({ float64 f64_val = {x}; f64_val; })
 152 #define const_float64(x) { x }
 153 #else
 154 typedef uint16_t float16;
 155 typedef uint32_t float32;
 156 typedef uint64_t float64;
 157 #define float16_val(x) (x)
 158 #define float32_val(x) (x)
 159 #define float64_val(x) (x)
 160 #define make_float16(x) (x)
 161 #define make_float32(x) (x)
 162 #define make_float64(x) (x)
 163 #define const_float16(x) (x)
 164 #define const_float32(x) (x)
 165 #define const_float64(x) (x)
 166 #endif
 167 #ifdef FLOATX80
 168 typedef struct {
 169     uint64_t low;
 170     uint16_t high;
 171 } floatx80;
 172 #endif
 173 #ifdef FLOAT128
 174 typedef struct {
 175 #ifdef HOST_WORDS_BIGENDIAN
 176     uint64_t high, low;
 177 #else
 178     uint64_t low, high;
 179 #endif
 180 } float128;
 181 #endif
 182
 183 /*----------------------------------------------------------------------------
 184 | Software IEC/IEEE floating-point underflow tininess-detection mode.
 185 *----------------------------------------------------------------------------*/
 186 enum {
 187     float_tininess_after_rounding  = 0,
 188     float_tininess_before_rounding = 1
 189 };
 190
 191 /*----------------------------------------------------------------------------
 192 | Software IEC/IEEE floating-point rounding mode.
 193 *----------------------------------------------------------------------------*/
 194 enum {
 195     float_round_nearest_even = 0,
 196     float_round_down         = 1,
 197     float_round_up           = 2,
 198     float_round_to_zero      = 3
 199 };
 200
 201 /*----------------------------------------------------------------------------
 202 | Software IEC/IEEE floating-point exception flags.
 203 *----------------------------------------------------------------------------*/
 204 enum {
 205     float_flag_invalid   =  1,
 206     float_flag_divbyzero =  4,
 207     float_flag_overflow  =  8,
 208     float_flag_underflow = 16,
 209     float_flag_inexact   = 32,
 210     float_flag_input_denormal = 64
 211 };
 212
 213 typedef struct float_status {
 214     signed char float_detect_tininess;
 215     signed char float_rounding_mode;
 216     signed char float_exception_flags;
 217 #ifdef FLOATX80
 218     signed char floatx80_rounding_precision;
 219 #endif
 220     /* should denormalised results go to zero and set the inexact flag? */
 221     flag flush_to_zero;
 222     /* should denormalised inputs go to zero and set the input_denormal flag? */
 223     flag flush_inputs_to_zero;
 224     flag default_nan_mode;
 225 } float_status;
 226
 227 void set_float_rounding_mode(int val STATUS_PARAM);
 228 void set_float_exception_flags(int val STATUS_PARAM);
 229 INLINE void set_flush_to_zero(flag val STATUS_PARAM)
 230 {
 231     STATUS(flush_to_zero) = val;
 232 }
 233 INLINE void set_flush_inputs_to_zero(flag val STATUS_PARAM)
 234 {
 235     STATUS(flush_inputs_to_zero) = val;
 236 }
 237 INLINE void set_default_nan_mode(flag val STATUS_PARAM)
 238 {
 239     STATUS(default_nan_mode) = val;
 240 }
 241 INLINE int get_float_exception_flags(float_status *status)
 242 {
 243     return STATUS(float_exception_flags);
 244 }
 245 #ifdef FLOATX80
 246 void set_floatx80_rounding_precision(int val STATUS_PARAM);
 247 #endif
 248
 249 /*----------------------------------------------------------------------------
 250 | Routine to raise any or all of the software IEC/IEEE floating-point
 251 | exception flags.
 252 *----------------------------------------------------------------------------*/
 253 void float_raise( int8 flags STATUS_PARAM);
 254
 255 /*----------------------------------------------------------------------------
 256 | Software IEC/IEEE integer-to-floating-point conversion routines.
 257 *----------------------------------------------------------------------------*/
 258 float32 int32_to_float32( int32 STATUS_PARAM );
 259 float64 int32_to_float64( int32 STATUS_PARAM );
 260 float32 uint32_to_float32( unsigned int STATUS_PARAM );
 261 float64 uint32_to_float64( unsigned int STATUS_PARAM );
 262 #ifdef FLOATX80
 263 floatx80 int32_to_floatx80( int32 STATUS_PARAM );
 264 #endif
 265 #ifdef FLOAT128
 266 float128 int32_to_float128( int32 STATUS_PARAM );
 267 #endif
 268 float32 int64_to_float32( int64 STATUS_PARAM );
 269 float32 uint64_to_float32( uint64 STATUS_PARAM );
 270 float64 int64_to_float64( int64 STATUS_PARAM );
 271 float64 uint64_to_float64( uint64 STATUS_PARAM );
 272 #ifdef FLOATX80
 273 floatx80 int64_to_floatx80( int64 STATUS_PARAM );
 274 #endif
 275 #ifdef FLOAT128
 276 float128 int64_to_float128( int64 STATUS_PARAM );
 277 #endif
 278
 279 /*----------------------------------------------------------------------------
 280 | Software half-precision conversion routines.
 281 *----------------------------------------------------------------------------*/
 282 float16 float32_to_float16( float32, flag STATUS_PARAM );
 283 float32 float16_to_float32( float16, flag STATUS_PARAM );
 284
 285 /*----------------------------------------------------------------------------
 286 | Software half-precision operations.
 287 *----------------------------------------------------------------------------*/
 288 int float16_is_quiet_nan( float16 );
 289 int float16_is_signaling_nan( float16 );
 290 float16 float16_maybe_silence_nan( float16 );
 291
 292 /*----------------------------------------------------------------------------
 293 | The pattern for a default generated half-precision NaN.
 294 *----------------------------------------------------------------------------*/
 295 #if defined(TARGET_ARM)
 296 #define float16_default_nan make_float16(0x7E00)
 297 #elif SNAN_BIT_IS_ONE
 298 #define float16_default_nan make_float16(0x7DFF)
 299 #else
 300 #define float16_default_nan make_float16(0xFE00)
 301 #endif
 302
 303 /*----------------------------------------------------------------------------
 304 | Software IEC/IEEE single-precision conversion routines.
 305 *----------------------------------------------------------------------------*/
 306 int16 float32_to_int16_round_to_zero( float32 STATUS_PARAM );
 307 unsigned int float32_to_uint16_round_to_zero( float32 STATUS_PARAM );
 308 int32 float32_to_int32( float32 STATUS_PARAM );
 309 int32 float32_to_int32_round_to_zero( float32 STATUS_PARAM );
 310 uint32 float32_to_uint32( float32 STATUS_PARAM );
 311 uint32 float32_to_uint32_round_to_zero( float32 STATUS_PARAM );
 312 int64 float32_to_int64( float32 STATUS_PARAM );
 313 int64 float32_to_int64_round_to_zero( float32 STATUS_PARAM );
 314 float64 float32_to_float64( float32 STATUS_PARAM );
 315 #ifdef FLOATX80
 316 floatx80 float32_to_floatx80( float32 STATUS_PARAM );
 317 #endif
 318 #ifdef FLOAT128
 319 float128 float32_to_float128( float32 STATUS_PARAM );
 320 #endif
 321
 322 /*----------------------------------------------------------------------------
 323 | Software IEC/IEEE single-precision operations.
 324 *----------------------------------------------------------------------------*/
 325 float32 float32_round_to_int( float32 STATUS_PARAM );
 326 float32 float32_add( float32, float32 STATUS_PARAM );
 327 float32 float32_sub( float32, float32 STATUS_PARAM );
 328 float32 float32_mul( float32, float32 STATUS_PARAM );
 329 float32 float32_div( float32, float32 STATUS_PARAM );
 330 float32 float32_rem( float32, float32 STATUS_PARAM );
 331 float32 float32_sqrt( float32 STATUS_PARAM );
 332 float32 float32_exp2( float32 STATUS_PARAM );
 333 float32 float32_log2( float32 STATUS_PARAM );
 334 int float32_eq( float32, float32 STATUS_PARAM );
 335 int float32_le( float32, float32 STATUS_PARAM );
 336 int float32_lt( float32, float32 STATUS_PARAM );
 337 int float32_eq_signaling( float32, float32 STATUS_PARAM );
 338 int float32_le_quiet( float32, float32 STATUS_PARAM );
 339 int float32_lt_quiet( float32, float32 STATUS_PARAM );
 340 int float32_compare( float32, float32 STATUS_PARAM );
 341 int float32_compare_quiet( float32, float32 STATUS_PARAM );
 342 int float32_is_quiet_nan( float32 );
 343 int float32_is_signaling_nan( float32 );
 344 float32 float32_maybe_silence_nan( float32 );
 345 float32 float32_scalbn( float32, int STATUS_PARAM );
 346
 347 INLINE float32 float32_abs(float32 a)
 348 {
 349     /* Note that abs does *not* handle NaN specially, nor does
 350      * it flush denormal inputs to zero.
 351      */
 352     return make_float32(float32_val(a) & 0x7fffffff);
 353 }
 354
 355 INLINE float32 float32_chs(float32 a)
 356 {
 357     /* Note that chs does *not* handle NaN specially, nor does
 358      * it flush denormal inputs to zero.
 359      */
 360     return make_float32(float32_val(a) ^ 0x80000000);
 361 }
 362
 363 INLINE int float32_is_infinity(float32 a)
 364 {
 365     return (float32_val(a) & 0x7fffffff) == 0x7f800000;
 366 }
 367
 368 INLINE int float32_is_neg(float32 a)
 369 {
 370     return float32_val(a) >> 31;
 371 }
 372
 373 INLINE int float32_is_zero(float32 a)
 374 {
 375     return (float32_val(a) & 0x7fffffff) == 0;
 376 }
 377
 378 INLINE int float32_is_any_nan(float32 a)
 379 {
 380     return ((float32_val(a) & ~(1 << 31)) > 0x7f800000UL);
 381 }
 382
 383 INLINE int float32_is_zero_or_denormal(float32 a)
 384 {
 385     return (float32_val(a) & 0x7f800000) == 0;
 386 }
 387
 388 INLINE float32 float32_set_sign(float32 a, int sign)
 389 {
 390     return make_float32((float32_val(a) & 0x7fffffff) | (sign << 31));
 391 }
 392
 393 #define float32_zero make_float32(0)
 394 #define float32_one make_float32(0x3f800000)
 395 #define float32_ln2 make_float32(0x3f317218)
 396 #define float32_half make_float32(0x3f000000)
 397 #define float32_infinity make_float32(0x7f800000)
 398
 399
 400 /*----------------------------------------------------------------------------
 401 | The pattern for a default generated single-precision NaN.
 402 *----------------------------------------------------------------------------*/
 403 #if defined(TARGET_SPARC)
 404 #define float32_default_nan make_float32(0x7FFFFFFF)
 405 #elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
 406 #define float32_default_nan make_float32(0x7FC00000)
 407 #elif SNAN_BIT_IS_ONE
 408 #define float32_default_nan make_float32(0x7FBFFFFF)
 409 #else
 410 #define float32_default_nan make_float32(0xFFC00000)
 411 #endif
 412
 413 /*----------------------------------------------------------------------------
 414 | Software IEC/IEEE double-precision conversion routines.
 415 *----------------------------------------------------------------------------*/
 416 int16 float64_to_int16_round_to_zero( float64 STATUS_PARAM );
 417 unsigned int float64_to_uint16_round_to_zero( float64 STATUS_PARAM );
 418 int32 float64_to_int32( float64 STATUS_PARAM );
 419 int32 float64_to_int32_round_to_zero( float64 STATUS_PARAM );
 420 uint32 float64_to_uint32( float64 STATUS_PARAM );
 421 uint32 float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
 422 int64 float64_to_int64( float64 STATUS_PARAM );
 423 int64 float64_to_int64_round_to_zero( float64 STATUS_PARAM );
 424 uint64 float64_to_uint64 (float64 a STATUS_PARAM);
 425 uint64 float64_to_uint64_round_to_zero (float64 a STATUS_PARAM);
 426 float32 float64_to_float32( float64 STATUS_PARAM );
 427 #ifdef FLOATX80
 428 floatx80 float64_to_floatx80( float64 STATUS_PARAM );
 429 #endif
 430 #ifdef FLOAT128
 431 float128 float64_to_float128( float64 STATUS_PARAM );
 432 #endif
 433
 434 /*----------------------------------------------------------------------------
 435 | Software IEC/IEEE double-precision operations.
 436 *----------------------------------------------------------------------------*/
 437 float64 float64_round_to_int( float64 STATUS_PARAM );
 438 float64 float64_trunc_to_int( float64 STATUS_PARAM );
 439 float64 float64_add( float64, float64 STATUS_PARAM );
 440 float64 float64_sub( float64, float64 STATUS_PARAM );
 441 float64 float64_mul( float64, float64 STATUS_PARAM );
 442 float64 float64_div( float64, float64 STATUS_PARAM );
 443 float64 float64_rem( float64, float64 STATUS_PARAM );
 444 float64 float64_sqrt( float64 STATUS_PARAM );
 445 float64 float64_log2( float64 STATUS_PARAM );
 446 int float64_eq( float64, float64 STATUS_PARAM );
 447 int float64_le( float64, float64 STATUS_PARAM );
 448 int float64_lt( float64, float64 STATUS_PARAM );
 449 int float64_eq_signaling( float64, float64 STATUS_PARAM );
 450 int float64_le_quiet( float64, float64 STATUS_PARAM );
 451 int float64_lt_quiet( float64, float64 STATUS_PARAM );
 452 int float64_compare( float64, float64 STATUS_PARAM );
 453 int float64_compare_quiet( float64, float64 STATUS_PARAM );
 454 int float64_is_quiet_nan( float64 a );
 455 int float64_is_signaling_nan( float64 );
 456 float64 float64_maybe_silence_nan( float64 );
 457 float64 float64_scalbn( float64, int STATUS_PARAM );
 458
 459 INLINE float64 float64_abs(float64 a)
 460 {
 461     /* Note that abs does *not* handle NaN specially, nor does
 462      * it flush denormal inputs to zero.
 463      */
 464     return make_float64(float64_val(a) & 0x7fffffffffffffffLL);
 465 }
 466
 467 INLINE float64 float64_chs(float64 a)
 468 {
 469     /* Note that chs does *not* handle NaN specially, nor does
 470      * it flush denormal inputs to zero.
 471      */
 472     return make_float64(float64_val(a) ^ 0x8000000000000000LL);
 473 }
 474
 475 INLINE int float64_is_infinity(float64 a)
 476 {
 477     return (float64_val(a) & 0x7fffffffffffffffLL ) == 0x7ff0000000000000LL;
 478 }
 479
 480 INLINE int float64_is_neg(float64 a)
 481 {
 482     return float64_val(a) >> 63;
 483 }
 484
 485 INLINE int float64_is_zero(float64 a)
 486 {
 487     return (float64_val(a) & 0x7fffffffffffffffLL) == 0;
 488 }
 489
 490 INLINE int float64_is_any_nan(float64 a)
 491 {
 492     return ((float64_val(a) & ~(1ULL << 63)) > 0x7ff0000000000000ULL);
 493 }
 494
 495 INLINE float64 float64_set_sign(float64 a, int sign)
 496 {
 497     return make_float64((float64_val(a) & 0x7fffffffffffffffULL)
 498                         | ((int64_t)sign << 63));
 499 }
 500
 501 #define float64_zero make_float64(0)
 502 #define float64_one make_float64(0x3ff0000000000000LL)
 503 #define float64_ln2 make_float64(0x3fe62e42fefa39efLL)
 504 #define float64_half make_float64(0x3fe0000000000000LL)
 505 #define float64_infinity make_float64(0x7ff0000000000000LL)
 506
 507 /*----------------------------------------------------------------------------
 508 | The pattern for a default generated double-precision NaN.
 509 *----------------------------------------------------------------------------*/
 510 #if defined(TARGET_SPARC)
 511 #define float64_default_nan make_float64(LIT64( 0x7FFFFFFFFFFFFFFF ))
 512 #elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
 513 #define float64_default_nan make_float64(LIT64( 0x7FF8000000000000 ))
 514 #elif SNAN_BIT_IS_ONE
 515 #define float64_default_nan make_float64(LIT64( 0x7FF7FFFFFFFFFFFF ))
 516 #else
 517 #define float64_default_nan make_float64(LIT64( 0xFFF8000000000000 ))
 518 #endif
 519
 520 #ifdef FLOATX80
 521
 522 /*----------------------------------------------------------------------------
 523 | Software IEC/IEEE extended double-precision conversion routines.
 524 *----------------------------------------------------------------------------*/
 525 int32 floatx80_to_int32( floatx80 STATUS_PARAM );
 526 int32 floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
 527 int64 floatx80_to_int64( floatx80 STATUS_PARAM );
 528 int64 floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM );
 529 float32 floatx80_to_float32( floatx80 STATUS_PARAM );
 530 float64 floatx80_to_float64( floatx80 STATUS_PARAM );
 531 #ifdef FLOAT128
 532 float128 floatx80_to_float128( floatx80 STATUS_PARAM );
 533 #endif
 534
 535 /*----------------------------------------------------------------------------
 536 | Software IEC/IEEE extended double-precision operations.
 537 *----------------------------------------------------------------------------*/
 538 floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
 539 floatx80 floatx80_add( floatx80, floatx80 STATUS_PARAM );
 540 floatx80 floatx80_sub( floatx80, floatx80 STATUS_PARAM );
 541 floatx80 floatx80_mul( floatx80, floatx80 STATUS_PARAM );
 542 floatx80 floatx80_div( floatx80, floatx80 STATUS_PARAM );
 543 floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
 544 floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
 545 int floatx80_eq( floatx80, floatx80 STATUS_PARAM );
 546 int floatx80_le( floatx80, floatx80 STATUS_PARAM );
 547 int floatx80_lt( floatx80, floatx80 STATUS_PARAM );
 548 int floatx80_eq_signaling( floatx80, floatx80 STATUS_PARAM );
 549 int floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM );
 550 int floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM );
 551 int floatx80_is_quiet_nan( floatx80 );
 552 int floatx80_is_signaling_nan( floatx80 );
 553 floatx80 floatx80_maybe_silence_nan( floatx80 );
 554 floatx80 floatx80_scalbn( floatx80, int STATUS_PARAM );
 555
 556 INLINE floatx80 floatx80_abs(floatx80 a)
 557 {
 558     a.high &= 0x7fff;
 559     return a;
 560 }
 561
 562 INLINE floatx80 floatx80_chs(floatx80 a)
 563 {
 564     a.high ^= 0x8000;
 565     return a;
 566 }
 567
 568 INLINE int floatx80_is_infinity(floatx80 a)
 569 {
 570     return (a.high & 0x7fff) == 0x7fff && a.low == 0;
 571 }
 572
 573 INLINE int floatx80_is_neg(floatx80 a)
 574 {
 575     return a.high >> 15;
 576 }
 577
 578 INLINE int floatx80_is_zero(floatx80 a)
 579 {
 580     return (a.high & 0x7fff) == 0 && a.low == 0;
 581 }
 582
 583 INLINE int floatx80_is_any_nan(floatx80 a)
 584 {
 585     return ((a.high & 0x7fff) == 0x7fff) && (a.low<<1);
 586 }
 587
 588 /*----------------------------------------------------------------------------
 589 | The pattern for a default generated extended double-precision NaN.  The
 590 | `high' and `low' values hold the most- and least-significant bits,
 591 | respectively.
 592 *----------------------------------------------------------------------------*/
 593 #if SNAN_BIT_IS_ONE
 594 #define floatx80_default_nan_high 0x7FFF
 595 #define floatx80_default_nan_low  LIT64( 0xBFFFFFFFFFFFFFFF )
 596 #else
 597 #define floatx80_default_nan_high 0xFFFF
 598 #define floatx80_default_nan_low  LIT64( 0xC000000000000000 )
 599 #endif
 600
 601 #endif
 602
 603 #ifdef FLOAT128
 604
 605 /*----------------------------------------------------------------------------
 606 | Software IEC/IEEE quadruple-precision conversion routines.
 607 *----------------------------------------------------------------------------*/
 608 int32 float128_to_int32( float128 STATUS_PARAM );
 609 int32 float128_to_int32_round_to_zero( float128 STATUS_PARAM );
 610 int64 float128_to_int64( float128 STATUS_PARAM );
 611 int64 float128_to_int64_round_to_zero( float128 STATUS_PARAM );
 612 float32 float128_to_float32( float128 STATUS_PARAM );
 613 float64 float128_to_float64( float128 STATUS_PARAM );
 614 #ifdef FLOATX80
 615 floatx80 float128_to_floatx80( float128 STATUS_PARAM );
 616 #endif
 617
 618 /*----------------------------------------------------------------------------
 619 | Software IEC/IEEE quadruple-precision operations.
 620 *----------------------------------------------------------------------------*/
 621 float128 float128_round_to_int( float128 STATUS_PARAM );
 622 float128 float128_add( float128, float128 STATUS_PARAM );
 623 float128 float128_sub( float128, float128 STATUS_PARAM );
 624 float128 float128_mul( float128, float128 STATUS_PARAM );
 625 float128 float128_div( float128, float128 STATUS_PARAM );
 626 float128 float128_rem( float128, float128 STATUS_PARAM );
 627 float128 float128_sqrt( float128 STATUS_PARAM );
 628 int float128_eq( float128, float128 STATUS_PARAM );
 629 int float128_le( float128, float128 STATUS_PARAM );
 630 int float128_lt( float128, float128 STATUS_PARAM );
 631 int float128_eq_signaling( float128, float128 STATUS_PARAM );
 632 int float128_le_quiet( float128, float128 STATUS_PARAM );
 633 int float128_lt_quiet( float128, float128 STATUS_PARAM );
 634 int float128_compare( float128, float128 STATUS_PARAM );
 635 int float128_compare_quiet( float128, float128 STATUS_PARAM );
 636 int float128_is_quiet_nan( float128 );
 637 int float128_is_signaling_nan( float128 );
 638 float128 float128_maybe_silence_nan( float128 );
 639 float128 float128_scalbn( float128, int STATUS_PARAM );
 640
 641 INLINE float128 float128_abs(float128 a)
 642 {
 643     a.high &= 0x7fffffffffffffffLL;
 644     return a;
 645 }
 646
 647 INLINE float128 float128_chs(float128 a)
 648 {
 649     a.high ^= 0x8000000000000000LL;
 650     return a;
 651 }
 652
 653 INLINE int float128_is_infinity(float128 a)
 654 {
 655     return (a.high & 0x7fffffffffffffffLL) == 0x7fff000000000000LL && a.low == 0;
 656 }
 657
 658 INLINE int float128_is_neg(float128 a)
 659 {
 660     return a.high >> 63;
 661 }
 662
 663 INLINE int float128_is_zero(float128 a)
 664 {
 665     return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0;
 666 }
 667
 668 INLINE int float128_is_any_nan(float128 a)
 669 {
 670     return ((a.high >> 48) & 0x7fff) == 0x7fff &&
 671         ((a.low != 0) || ((a.high & 0xffffffffffffLL) != 0));
 672 }
 673
 674 /*----------------------------------------------------------------------------
 675 | The pattern for a default generated quadruple-precision NaN.  The `high' and
 676 | `low' values hold the most- and least-significant bits, respectively.
 677 *----------------------------------------------------------------------------*/
 678 #if SNAN_BIT_IS_ONE
 679 #define float128_default_nan_high LIT64( 0x7FFF7FFFFFFFFFFF )
 680 #define float128_default_nan_low  LIT64( 0xFFFFFFFFFFFFFFFF )
 681 #else
 682 #define float128_default_nan_high LIT64( 0xFFFF800000000000 )
 683 #define float128_default_nan_low  LIT64( 0x0000000000000000 )
 684 #endif
 685
 686 #endif
 687
 688 #else /* CONFIG_SOFTFLOAT */
 689
 690 #include "softfloat-native.h"
 691
 692 #endif /* !CONFIG_SOFTFLOAT */
 693
 694 #endif /* !SOFTFLOAT_H */