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     uint16_t v;
 124 } float16;
 125 #define float16_val(x) (((float16)(x)).v)
 126 #define make_float16(x) __extension__ ({ float16 f16_val = {x}; f16_val; })
 127 typedef struct {
 128     uint32_t v;
 129 } float32;
 130 /* The cast ensures an error if the wrong type is passed.  */
 131 #define float32_val(x) (((float32)(x)).v)
 132 #define make_float32(x) __extension__ ({ float32 f32_val = {x}; f32_val; })
 133 typedef struct {
 134     uint64_t v;
 135 } float64;
 136 #define float64_val(x) (((float64)(x)).v)
 137 #define make_float64(x) __extension__ ({ float64 f64_val = {x}; f64_val; })
 138 #else
 139 typedef uint16_t float16;
 140 typedef uint32_t float32;
 141 typedef uint64_t float64;
 142 #define float16_val(x) (x)
 143 #define float32_val(x) (x)
 144 #define float64_val(x) (x)
 145 #define make_float16(x) (x)
 146 #define make_float32(x) (x)
 147 #define make_float64(x) (x)
 148 #endif
 149 #ifdef FLOATX80
 150 typedef struct {
 151     uint64_t low;
 152     uint16_t high;
 153 } floatx80;
 154 #endif
 155 #ifdef FLOAT128
 156 typedef struct {
 157 #ifdef HOST_WORDS_BIGENDIAN
 158     uint64_t high, low;
 159 #else
 160     uint64_t low, high;
 161 #endif
 162 } float128;
 163 #endif
 164
 165 /*----------------------------------------------------------------------------
 166 | Software IEC/IEEE floating-point underflow tininess-detection mode.
 167 *----------------------------------------------------------------------------*/
 168 enum {
 169     float_tininess_after_rounding  = 0,
 170     float_tininess_before_rounding = 1
 171 };
 172
 173 /*----------------------------------------------------------------------------
 174 | Software IEC/IEEE floating-point rounding mode.
 175 *----------------------------------------------------------------------------*/
 176 enum {
 177     float_round_nearest_even = 0,
 178     float_round_down         = 1,
 179     float_round_up           = 2,
 180     float_round_to_zero      = 3
 181 };
 182
 183 /*----------------------------------------------------------------------------
 184 | Software IEC/IEEE floating-point exception flags.
 185 *----------------------------------------------------------------------------*/
 186 enum {
 187     float_flag_invalid   =  1,
 188     float_flag_divbyzero =  4,
 189     float_flag_overflow  =  8,
 190     float_flag_underflow = 16,
 191     float_flag_inexact   = 32,
 192     float_flag_input_denormal = 64
 193 };
 194
 195 typedef struct float_status {
 196     signed char float_detect_tininess;
 197     signed char float_rounding_mode;
 198     signed char float_exception_flags;
 199 #ifdef FLOATX80
 200     signed char floatx80_rounding_precision;
 201 #endif
 202     /* should denormalised results go to zero and set the inexact flag? */
 203     flag flush_to_zero;
 204     /* should denormalised inputs go to zero and set the input_denormal flag? */
 205     flag flush_inputs_to_zero;
 206     flag default_nan_mode;
 207 } float_status;
 208
 209 void set_float_rounding_mode(int val STATUS_PARAM);
 210 void set_float_exception_flags(int val STATUS_PARAM);
 211 INLINE void set_flush_to_zero(flag val STATUS_PARAM)
 212 {
 213     STATUS(flush_to_zero) = val;
 214 }
 215 INLINE void set_flush_inputs_to_zero(flag val STATUS_PARAM)
 216 {
 217     STATUS(flush_inputs_to_zero) = val;
 218 }
 219 INLINE void set_default_nan_mode(flag val STATUS_PARAM)
 220 {
 221     STATUS(default_nan_mode) = val;
 222 }
 223 INLINE int get_float_exception_flags(float_status *status)
 224 {
 225     return STATUS(float_exception_flags);
 226 }
 227 #ifdef FLOATX80
 228 void set_floatx80_rounding_precision(int val STATUS_PARAM);
 229 #endif
 230
 231 /*----------------------------------------------------------------------------
 232 | Routine to raise any or all of the software IEC/IEEE floating-point
 233 | exception flags.
 234 *----------------------------------------------------------------------------*/
 235 void float_raise( int8 flags STATUS_PARAM);
 236
 237 /*----------------------------------------------------------------------------
 238 | Software IEC/IEEE integer-to-floating-point conversion routines.
 239 *----------------------------------------------------------------------------*/
 240 float32 int32_to_float32( int STATUS_PARAM );
 241 float64 int32_to_float64( int STATUS_PARAM );
 242 float32 uint32_to_float32( unsigned int STATUS_PARAM );
 243 float64 uint32_to_float64( unsigned int STATUS_PARAM );
 244 #ifdef FLOATX80
 245 floatx80 int32_to_floatx80( int STATUS_PARAM );
 246 #endif
 247 #ifdef FLOAT128
 248 float128 int32_to_float128( int STATUS_PARAM );
 249 #endif
 250 float32 int64_to_float32( int64_t STATUS_PARAM );
 251 float32 uint64_to_float32( uint64_t STATUS_PARAM );
 252 float64 int64_to_float64( int64_t STATUS_PARAM );
 253 float64 uint64_to_float64( uint64_t STATUS_PARAM );
 254 #ifdef FLOATX80
 255 floatx80 int64_to_floatx80( int64_t STATUS_PARAM );
 256 #endif
 257 #ifdef FLOAT128
 258 float128 int64_to_float128( int64_t STATUS_PARAM );
 259 #endif
 260
 261 /*----------------------------------------------------------------------------
 262 | Software half-precision conversion routines.
 263 *----------------------------------------------------------------------------*/
 264 float16 float32_to_float16( float32, flag STATUS_PARAM );
 265 float32 float16_to_float32( float16, flag STATUS_PARAM );
 266
 267 /*----------------------------------------------------------------------------
 268 | Software half-precision operations.
 269 *----------------------------------------------------------------------------*/
 270 int float16_is_quiet_nan( float16 );
 271 int float16_is_signaling_nan( float16 );
 272 float16 float16_maybe_silence_nan( float16 );
 273
 274 /*----------------------------------------------------------------------------
 275 | Software IEC/IEEE single-precision conversion routines.
 276 *----------------------------------------------------------------------------*/
 277 int float32_to_int16_round_to_zero( float32 STATUS_PARAM );
 278 unsigned int float32_to_uint16_round_to_zero( float32 STATUS_PARAM );
 279 int float32_to_int32( float32 STATUS_PARAM );
 280 int float32_to_int32_round_to_zero( float32 STATUS_PARAM );
 281 unsigned int float32_to_uint32( float32 STATUS_PARAM );
 282 unsigned int float32_to_uint32_round_to_zero( float32 STATUS_PARAM );
 283 int64_t float32_to_int64( float32 STATUS_PARAM );
 284 int64_t float32_to_int64_round_to_zero( float32 STATUS_PARAM );
 285 float64 float32_to_float64( float32 STATUS_PARAM );
 286 #ifdef FLOATX80
 287 floatx80 float32_to_floatx80( float32 STATUS_PARAM );
 288 #endif
 289 #ifdef FLOAT128
 290 float128 float32_to_float128( float32 STATUS_PARAM );
 291 #endif
 292
 293 /*----------------------------------------------------------------------------
 294 | Software IEC/IEEE single-precision operations.
 295 *----------------------------------------------------------------------------*/
 296 float32 float32_round_to_int( float32 STATUS_PARAM );
 297 float32 float32_add( float32, float32 STATUS_PARAM );
 298 float32 float32_sub( float32, float32 STATUS_PARAM );
 299 float32 float32_mul( float32, float32 STATUS_PARAM );
 300 float32 float32_div( float32, float32 STATUS_PARAM );
 301 float32 float32_rem( float32, float32 STATUS_PARAM );
 302 float32 float32_sqrt( float32 STATUS_PARAM );
 303 float32 float32_exp2( float32 STATUS_PARAM );
 304 float32 float32_log2( float32 STATUS_PARAM );
 305 int float32_eq( float32, float32 STATUS_PARAM );
 306 int float32_le( float32, float32 STATUS_PARAM );
 307 int float32_lt( float32, float32 STATUS_PARAM );
 308 int float32_eq_signaling( float32, float32 STATUS_PARAM );
 309 int float32_le_quiet( float32, float32 STATUS_PARAM );
 310 int float32_lt_quiet( float32, float32 STATUS_PARAM );
 311 int float32_compare( float32, float32 STATUS_PARAM );
 312 int float32_compare_quiet( float32, float32 STATUS_PARAM );
 313 int float32_is_quiet_nan( float32 );
 314 int float32_is_signaling_nan( float32 );
 315 float32 float32_maybe_silence_nan( float32 );
 316 float32 float32_scalbn( float32, int STATUS_PARAM );
 317
 318 INLINE float32 float32_abs(float32 a)
 319 {
 320     /* Note that abs does *not* handle NaN specially, nor does
 321      * it flush denormal inputs to zero.
 322      */
 323     return make_float32(float32_val(a) & 0x7fffffff);
 324 }
 325
 326 INLINE float32 float32_chs(float32 a)
 327 {
 328     /* Note that chs does *not* handle NaN specially, nor does
 329      * it flush denormal inputs to zero.
 330      */
 331     return make_float32(float32_val(a) ^ 0x80000000);
 332 }
 333
 334 INLINE int float32_is_infinity(float32 a)
 335 {
 336     return (float32_val(a) & 0x7fffffff) == 0x7f800000;
 337 }
 338
 339 INLINE int float32_is_neg(float32 a)
 340 {
 341     return float32_val(a) >> 31;
 342 }
 343
 344 INLINE int float32_is_zero(float32 a)
 345 {
 346     return (float32_val(a) & 0x7fffffff) == 0;
 347 }
 348
 349 INLINE int float32_is_any_nan(float32 a)
 350 {
 351     return ((float32_val(a) & ~(1 << 31)) > 0x7f800000UL);
 352 }
 353
 354 INLINE int float32_is_zero_or_denormal(float32 a)
 355 {
 356     return (float32_val(a) & 0x7f800000) == 0;
 357 }
 358
 359 #define float32_zero make_float32(0)
 360 #define float32_one make_float32(0x3f800000)
 361 #define float32_ln2 make_float32(0x3f317218)
 362
 363 /*----------------------------------------------------------------------------
 364 | Software IEC/IEEE double-precision conversion routines.
 365 *----------------------------------------------------------------------------*/
 366 int float64_to_int16_round_to_zero( float64 STATUS_PARAM );
 367 unsigned int float64_to_uint16_round_to_zero( float64 STATUS_PARAM );
 368 int float64_to_int32( float64 STATUS_PARAM );
 369 int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
 370 unsigned int float64_to_uint32( float64 STATUS_PARAM );
 371 unsigned int float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
 372 int64_t float64_to_int64( float64 STATUS_PARAM );
 373 int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
 374 uint64_t float64_to_uint64 (float64 a STATUS_PARAM);
 375 uint64_t float64_to_uint64_round_to_zero (float64 a STATUS_PARAM);
 376 float32 float64_to_float32( float64 STATUS_PARAM );
 377 #ifdef FLOATX80
 378 floatx80 float64_to_floatx80( float64 STATUS_PARAM );
 379 #endif
 380 #ifdef FLOAT128
 381 float128 float64_to_float128( float64 STATUS_PARAM );
 382 #endif
 383
 384 /*----------------------------------------------------------------------------
 385 | Software IEC/IEEE double-precision operations.
 386 *----------------------------------------------------------------------------*/
 387 float64 float64_round_to_int( float64 STATUS_PARAM );
 388 float64 float64_trunc_to_int( float64 STATUS_PARAM );
 389 float64 float64_add( float64, float64 STATUS_PARAM );
 390 float64 float64_sub( float64, float64 STATUS_PARAM );
 391 float64 float64_mul( float64, float64 STATUS_PARAM );
 392 float64 float64_div( float64, float64 STATUS_PARAM );
 393 float64 float64_rem( float64, float64 STATUS_PARAM );
 394 float64 float64_sqrt( float64 STATUS_PARAM );
 395 float64 float64_log2( float64 STATUS_PARAM );
 396 int float64_eq( float64, float64 STATUS_PARAM );
 397 int float64_le( float64, float64 STATUS_PARAM );
 398 int float64_lt( float64, float64 STATUS_PARAM );
 399 int float64_eq_signaling( float64, float64 STATUS_PARAM );
 400 int float64_le_quiet( float64, float64 STATUS_PARAM );
 401 int float64_lt_quiet( float64, float64 STATUS_PARAM );
 402 int float64_compare( float64, float64 STATUS_PARAM );
 403 int float64_compare_quiet( float64, float64 STATUS_PARAM );
 404 int float64_is_quiet_nan( float64 a );
 405 int float64_is_signaling_nan( float64 );
 406 float64 float64_maybe_silence_nan( float64 );
 407 float64 float64_scalbn( float64, int STATUS_PARAM );
 408
 409 INLINE float64 float64_abs(float64 a)
 410 {
 411     /* Note that abs does *not* handle NaN specially, nor does
 412      * it flush denormal inputs to zero.
 413      */
 414     return make_float64(float64_val(a) & 0x7fffffffffffffffLL);
 415 }
 416
 417 INLINE float64 float64_chs(float64 a)
 418 {
 419     /* Note that chs does *not* handle NaN specially, nor does
 420      * it flush denormal inputs to zero.
 421      */
 422     return make_float64(float64_val(a) ^ 0x8000000000000000LL);
 423 }
 424
 425 INLINE int float64_is_infinity(float64 a)
 426 {
 427     return (float64_val(a) & 0x7fffffffffffffffLL ) == 0x7ff0000000000000LL;
 428 }
 429
 430 INLINE int float64_is_neg(float64 a)
 431 {
 432     return float64_val(a) >> 63;
 433 }
 434
 435 INLINE int float64_is_zero(float64 a)
 436 {
 437     return (float64_val(a) & 0x7fffffffffffffffLL) == 0;
 438 }
 439
 440 INLINE int float64_is_any_nan(float64 a)
 441 {
 442     return ((float64_val(a) & ~(1ULL << 63)) > 0x7ff0000000000000ULL);
 443 }
 444
 445 #define float64_zero make_float64(0)
 446 #define float64_one make_float64(0x3ff0000000000000LL)
 447 #define float64_ln2 make_float64(0x3fe62e42fefa39efLL)
 448
 449 #ifdef FLOATX80
 450
 451 /*----------------------------------------------------------------------------
 452 | Software IEC/IEEE extended double-precision conversion routines.
 453 *----------------------------------------------------------------------------*/
 454 int floatx80_to_int32( floatx80 STATUS_PARAM );
 455 int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
 456 int64_t floatx80_to_int64( floatx80 STATUS_PARAM );
 457 int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM );
 458 float32 floatx80_to_float32( floatx80 STATUS_PARAM );
 459 float64 floatx80_to_float64( floatx80 STATUS_PARAM );
 460 #ifdef FLOAT128
 461 float128 floatx80_to_float128( floatx80 STATUS_PARAM );
 462 #endif
 463
 464 /*----------------------------------------------------------------------------
 465 | Software IEC/IEEE extended double-precision operations.
 466 *----------------------------------------------------------------------------*/
 467 floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
 468 floatx80 floatx80_add( floatx80, floatx80 STATUS_PARAM );
 469 floatx80 floatx80_sub( floatx80, floatx80 STATUS_PARAM );
 470 floatx80 floatx80_mul( floatx80, floatx80 STATUS_PARAM );
 471 floatx80 floatx80_div( floatx80, floatx80 STATUS_PARAM );
 472 floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
 473 floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
 474 int floatx80_eq( floatx80, floatx80 STATUS_PARAM );
 475 int floatx80_le( floatx80, floatx80 STATUS_PARAM );
 476 int floatx80_lt( floatx80, floatx80 STATUS_PARAM );
 477 int floatx80_eq_signaling( floatx80, floatx80 STATUS_PARAM );
 478 int floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM );
 479 int floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM );
 480 int floatx80_is_quiet_nan( floatx80 );
 481 int floatx80_is_signaling_nan( floatx80 );
 482 floatx80 floatx80_maybe_silence_nan( floatx80 );
 483 floatx80 floatx80_scalbn( floatx80, int STATUS_PARAM );
 484
 485 INLINE floatx80 floatx80_abs(floatx80 a)
 486 {
 487     a.high &= 0x7fff;
 488     return a;
 489 }
 490
 491 INLINE floatx80 floatx80_chs(floatx80 a)
 492 {
 493     a.high ^= 0x8000;
 494     return a;
 495 }
 496
 497 INLINE int floatx80_is_infinity(floatx80 a)
 498 {
 499     return (a.high & 0x7fff) == 0x7fff && a.low == 0;
 500 }
 501
 502 INLINE int floatx80_is_neg(floatx80 a)
 503 {
 504     return a.high >> 15;
 505 }
 506
 507 INLINE int floatx80_is_zero(floatx80 a)
 508 {
 509     return (a.high & 0x7fff) == 0 && a.low == 0;
 510 }
 511
 512 INLINE int floatx80_is_any_nan(floatx80 a)
 513 {
 514     return ((a.high & 0x7fff) == 0x7fff) && (a.low<<1);
 515 }
 516
 517 #endif
 518
 519 #ifdef FLOAT128
 520
 521 /*----------------------------------------------------------------------------
 522 | Software IEC/IEEE quadruple-precision conversion routines.
 523 *----------------------------------------------------------------------------*/
 524 int float128_to_int32( float128 STATUS_PARAM );
 525 int float128_to_int32_round_to_zero( float128 STATUS_PARAM );
 526 int64_t float128_to_int64( float128 STATUS_PARAM );
 527 int64_t float128_to_int64_round_to_zero( float128 STATUS_PARAM );
 528 float32 float128_to_float32( float128 STATUS_PARAM );
 529 float64 float128_to_float64( float128 STATUS_PARAM );
 530 #ifdef FLOATX80
 531 floatx80 float128_to_floatx80( float128 STATUS_PARAM );
 532 #endif
 533
 534 /*----------------------------------------------------------------------------
 535 | Software IEC/IEEE quadruple-precision operations.
 536 *----------------------------------------------------------------------------*/
 537 float128 float128_round_to_int( float128 STATUS_PARAM );
 538 float128 float128_add( float128, float128 STATUS_PARAM );
 539 float128 float128_sub( float128, float128 STATUS_PARAM );
 540 float128 float128_mul( float128, float128 STATUS_PARAM );
 541 float128 float128_div( float128, float128 STATUS_PARAM );
 542 float128 float128_rem( float128, float128 STATUS_PARAM );
 543 float128 float128_sqrt( float128 STATUS_PARAM );
 544 int float128_eq( float128, float128 STATUS_PARAM );
 545 int float128_le( float128, float128 STATUS_PARAM );
 546 int float128_lt( float128, float128 STATUS_PARAM );
 547 int float128_eq_signaling( float128, float128 STATUS_PARAM );
 548 int float128_le_quiet( float128, float128 STATUS_PARAM );
 549 int float128_lt_quiet( float128, float128 STATUS_PARAM );
 550 int float128_compare( float128, float128 STATUS_PARAM );
 551 int float128_compare_quiet( float128, float128 STATUS_PARAM );
 552 int float128_is_quiet_nan( float128 );
 553 int float128_is_signaling_nan( float128 );
 554 float128 float128_maybe_silence_nan( float128 );
 555 float128 float128_scalbn( float128, int STATUS_PARAM );
 556
 557 INLINE float128 float128_abs(float128 a)
 558 {
 559     a.high &= 0x7fffffffffffffffLL;
 560     return a;
 561 }
 562
 563 INLINE float128 float128_chs(float128 a)
 564 {
 565     a.high ^= 0x8000000000000000LL;
 566     return a;
 567 }
 568
 569 INLINE int float128_is_infinity(float128 a)
 570 {
 571     return (a.high & 0x7fffffffffffffffLL) == 0x7fff000000000000LL && a.low == 0;
 572 }
 573
 574 INLINE int float128_is_neg(float128 a)
 575 {
 576     return a.high >> 63;
 577 }
 578
 579 INLINE int float128_is_zero(float128 a)
 580 {
 581     return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0;
 582 }
 583
 584 INLINE int float128_is_any_nan(float128 a)
 585 {
 586     return ((a.high >> 48) & 0x7fff) == 0x7fff &&
 587         ((a.low != 0) || ((a.high & 0xffffffffffffLL) != 0));
 588 }
 589
 590 #endif
 591
 592 #else /* CONFIG_SOFTFLOAT */
 593
 594 #include "softfloat-native.h"
 595
 596 #endif /* !CONFIG_SOFTFLOAT */
 597
 598 #endif /* !SOFTFLOAT_H */