fpu/softfloat.h

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