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 #define const_float16(x) { x }
 128 typedef struct {
 129     uint32_t v;
 130 } float32;
 131 /* The cast ensures an error if the wrong type is passed.  */
 132 #define float32_val(x) (((float32)(x)).v)
 133 #define make_float32(x) __extension__ ({ float32 f32_val = {x}; f32_val; })
 134 #define const_float32(x) { x }
 135 typedef struct {
 136     uint64_t v;
 137 } float64;
 138 #define float64_val(x) (((float64)(x)).v)
 139 #define make_float64(x) __extension__ ({ float64 f64_val = {x}; f64_val; })
 140 #define const_float64(x) { x }
 141 #else
 142 typedef uint16_t float16;
 143 typedef uint32_t float32;
 144 typedef uint64_t float64;
 145 #define float16_val(x) (x)
 146 #define float32_val(x) (x)
 147 #define float64_val(x) (x)
 148 #define make_float16(x) (x)
 149 #define make_float32(x) (x)
 150 #define make_float64(x) (x)
 151 #define const_float16(x) (x)
 152 #define const_float32(x) (x)
 153 #define const_float64(x) (x)
 154 #endif
 155 #ifdef FLOATX80
 156 typedef struct {
 157     uint64_t low;
 158     uint16_t high;
 159 } floatx80;
 160 #endif
 161 #ifdef FLOAT128
 162 typedef struct {
 163 #ifdef HOST_WORDS_BIGENDIAN
 164     uint64_t high, low;
 165 #else
 166     uint64_t low, high;
 167 #endif
 168 } float128;
 169 #endif
 170
 171 /*----------------------------------------------------------------------------
 172 | Software IEC/IEEE floating-point underflow tininess-detection mode.
 173 *----------------------------------------------------------------------------*/
 174 enum {
 175     float_tininess_after_rounding  = 0,
 176     float_tininess_before_rounding = 1
 177 };
 178
 179 /*----------------------------------------------------------------------------
 180 | Software IEC/IEEE floating-point rounding mode.
 181 *----------------------------------------------------------------------------*/
 182 enum {
 183     float_round_nearest_even = 0,
 184     float_round_down         = 1,
 185     float_round_up           = 2,
 186     float_round_to_zero      = 3
 187 };
 188
 189 /*----------------------------------------------------------------------------
 190 | Software IEC/IEEE floating-point exception flags.
 191 *----------------------------------------------------------------------------*/
 192 enum {
 193     float_flag_invalid   =  1,
 194     float_flag_divbyzero =  4,
 195     float_flag_overflow  =  8,
 196     float_flag_underflow = 16,
 197     float_flag_inexact   = 32,
 198     float_flag_input_denormal = 64
 199 };
 200
 201 typedef struct float_status {
 202     signed char float_detect_tininess;
 203     signed char float_rounding_mode;
 204     signed char float_exception_flags;
 205 #ifdef FLOATX80
 206     signed char floatx80_rounding_precision;
 207 #endif
 208     /* should denormalised results go to zero and set the inexact flag? */
 209     flag flush_to_zero;
 210     /* should denormalised inputs go to zero and set the input_denormal flag? */
 211     flag flush_inputs_to_zero;
 212     flag default_nan_mode;
 213 } float_status;
 214
 215 void set_float_rounding_mode(int val STATUS_PARAM);
 216 void set_float_exception_flags(int val STATUS_PARAM);
 217 INLINE void set_flush_to_zero(flag val STATUS_PARAM)
 218 {
 219     STATUS(flush_to_zero) = val;
 220 }
 221 INLINE void set_flush_inputs_to_zero(flag val STATUS_PARAM)
 222 {
 223     STATUS(flush_inputs_to_zero) = val;
 224 }
 225 INLINE void set_default_nan_mode(flag val STATUS_PARAM)
 226 {
 227     STATUS(default_nan_mode) = val;
 228 }
 229 INLINE int get_float_exception_flags(float_status *status)
 230 {
 231     return STATUS(float_exception_flags);
 232 }
 233 #ifdef FLOATX80
 234 void set_floatx80_rounding_precision(int val STATUS_PARAM);
 235 #endif
 236
 237 /*----------------------------------------------------------------------------
 238 | Routine to raise any or all of the software IEC/IEEE floating-point
 239 | exception flags.
 240 *----------------------------------------------------------------------------*/
 241 void float_raise( int8 flags STATUS_PARAM);
 242
 243 /*----------------------------------------------------------------------------
 244 | Software IEC/IEEE integer-to-floating-point conversion routines.
 245 *----------------------------------------------------------------------------*/
 246 float32 int32_to_float32( int STATUS_PARAM );
 247 float64 int32_to_float64( int STATUS_PARAM );
 248 float32 uint32_to_float32( unsigned int STATUS_PARAM );
 249 float64 uint32_to_float64( unsigned int STATUS_PARAM );
 250 #ifdef FLOATX80
 251 floatx80 int32_to_floatx80( int STATUS_PARAM );
 252 #endif
 253 #ifdef FLOAT128
 254 float128 int32_to_float128( int STATUS_PARAM );
 255 #endif
 256 float32 int64_to_float32( int64_t STATUS_PARAM );
 257 float32 uint64_to_float32( uint64_t STATUS_PARAM );
 258 float64 int64_to_float64( int64_t STATUS_PARAM );
 259 float64 uint64_to_float64( uint64_t STATUS_PARAM );
 260 #ifdef FLOATX80
 261 floatx80 int64_to_floatx80( int64_t STATUS_PARAM );
 262 #endif
 263 #ifdef FLOAT128
 264 float128 int64_to_float128( int64_t STATUS_PARAM );
 265 #endif
 266
 267 /*----------------------------------------------------------------------------
 268 | Software half-precision conversion routines.
 269 *----------------------------------------------------------------------------*/
 270 float16 float32_to_float16( float32, flag STATUS_PARAM );
 271 float32 float16_to_float32( float16, flag STATUS_PARAM );
 272
 273 /*----------------------------------------------------------------------------
 274 | Software half-precision operations.
 275 *----------------------------------------------------------------------------*/
 276 int float16_is_quiet_nan( float16 );
 277 int float16_is_signaling_nan( float16 );
 278 float16 float16_maybe_silence_nan( float16 );
 279
 280 /*----------------------------------------------------------------------------
 281 | Software IEC/IEEE single-precision conversion routines.
 282 *----------------------------------------------------------------------------*/
 283 int float32_to_int16_round_to_zero( float32 STATUS_PARAM );
 284 unsigned int float32_to_uint16_round_to_zero( float32 STATUS_PARAM );
 285 int float32_to_int32( float32 STATUS_PARAM );
 286 int float32_to_int32_round_to_zero( float32 STATUS_PARAM );
 287 unsigned int float32_to_uint32( float32 STATUS_PARAM );
 288 unsigned int float32_to_uint32_round_to_zero( float32 STATUS_PARAM );
 289 int64_t float32_to_int64( float32 STATUS_PARAM );
 290 int64_t float32_to_int64_round_to_zero( float32 STATUS_PARAM );
 291 float64 float32_to_float64( float32 STATUS_PARAM );
 292 #ifdef FLOATX80
 293 floatx80 float32_to_floatx80( float32 STATUS_PARAM );
 294 #endif
 295 #ifdef FLOAT128
 296 float128 float32_to_float128( float32 STATUS_PARAM );
 297 #endif
 298
 299 /*----------------------------------------------------------------------------
 300 | Software IEC/IEEE single-precision operations.
 301 *----------------------------------------------------------------------------*/
 302 float32 float32_round_to_int( float32 STATUS_PARAM );
 303 float32 float32_add( float32, float32 STATUS_PARAM );
 304 float32 float32_sub( float32, float32 STATUS_PARAM );
 305 float32 float32_mul( float32, float32 STATUS_PARAM );
 306 float32 float32_div( float32, float32 STATUS_PARAM );
 307 float32 float32_rem( float32, float32 STATUS_PARAM );
 308 float32 float32_sqrt( float32 STATUS_PARAM );
 309 float32 float32_exp2( float32 STATUS_PARAM );
 310 float32 float32_log2( float32 STATUS_PARAM );
 311 int float32_eq( float32, float32 STATUS_PARAM );
 312 int float32_le( float32, float32 STATUS_PARAM );
 313 int float32_lt( float32, float32 STATUS_PARAM );
 314 int float32_eq_signaling( float32, float32 STATUS_PARAM );
 315 int float32_le_quiet( float32, float32 STATUS_PARAM );
 316 int float32_lt_quiet( float32, float32 STATUS_PARAM );
 317 int float32_compare( float32, float32 STATUS_PARAM );
 318 int float32_compare_quiet( float32, float32 STATUS_PARAM );
 319 int float32_is_quiet_nan( float32 );
 320 int float32_is_signaling_nan( float32 );
 321 float32 float32_maybe_silence_nan( float32 );
 322 float32 float32_scalbn( float32, int STATUS_PARAM );
 323
 324 INLINE float32 float32_abs(float32 a)
 325 {
 326     /* Note that abs does *not* handle NaN specially, nor does
 327      * it flush denormal inputs to zero.
 328      */
 329     return make_float32(float32_val(a) & 0x7fffffff);
 330 }
 331
 332 INLINE float32 float32_chs(float32 a)
 333 {
 334     /* Note that chs does *not* handle NaN specially, nor does
 335      * it flush denormal inputs to zero.
 336      */
 337     return make_float32(float32_val(a) ^ 0x80000000);
 338 }
 339
 340 INLINE int float32_is_infinity(float32 a)
 341 {
 342     return (float32_val(a) & 0x7fffffff) == 0x7f800000;
 343 }
 344
 345 INLINE int float32_is_neg(float32 a)
 346 {
 347     return float32_val(a) >> 31;
 348 }
 349
 350 INLINE int float32_is_zero(float32 a)
 351 {
 352     return (float32_val(a) & 0x7fffffff) == 0;
 353 }
 354
 355 INLINE int float32_is_any_nan(float32 a)
 356 {
 357     return ((float32_val(a) & ~(1 << 31)) > 0x7f800000UL);
 358 }
 359
 360 INLINE int float32_is_zero_or_denormal(float32 a)
 361 {
 362     return (float32_val(a) & 0x7f800000) == 0;
 363 }
 364
 365 #define float32_zero make_float32(0)
 366 #define float32_one make_float32(0x3f800000)
 367 #define float32_ln2 make_float32(0x3f317218)
 368
 369 /*----------------------------------------------------------------------------
 370 | Software IEC/IEEE double-precision conversion routines.
 371 *----------------------------------------------------------------------------*/
 372 int float64_to_int16_round_to_zero( float64 STATUS_PARAM );
 373 unsigned int float64_to_uint16_round_to_zero( float64 STATUS_PARAM );
 374 int float64_to_int32( float64 STATUS_PARAM );
 375 int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
 376 unsigned int float64_to_uint32( float64 STATUS_PARAM );
 377 unsigned int float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
 378 int64_t float64_to_int64( float64 STATUS_PARAM );
 379 int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
 380 uint64_t float64_to_uint64 (float64 a STATUS_PARAM);
 381 uint64_t float64_to_uint64_round_to_zero (float64 a STATUS_PARAM);
 382 float32 float64_to_float32( float64 STATUS_PARAM );
 383 #ifdef FLOATX80
 384 floatx80 float64_to_floatx80( float64 STATUS_PARAM );
 385 #endif
 386 #ifdef FLOAT128
 387 float128 float64_to_float128( float64 STATUS_PARAM );
 388 #endif
 389
 390 /*----------------------------------------------------------------------------
 391 | Software IEC/IEEE double-precision operations.
 392 *----------------------------------------------------------------------------*/
 393 float64 float64_round_to_int( float64 STATUS_PARAM );
 394 float64 float64_trunc_to_int( float64 STATUS_PARAM );
 395 float64 float64_add( float64, float64 STATUS_PARAM );
 396 float64 float64_sub( float64, float64 STATUS_PARAM );
 397 float64 float64_mul( float64, float64 STATUS_PARAM );
 398 float64 float64_div( float64, float64 STATUS_PARAM );
 399 float64 float64_rem( float64, float64 STATUS_PARAM );
 400 float64 float64_sqrt( float64 STATUS_PARAM );
 401 float64 float64_log2( float64 STATUS_PARAM );
 402 int float64_eq( float64, float64 STATUS_PARAM );
 403 int float64_le( float64, float64 STATUS_PARAM );
 404 int float64_lt( float64, float64 STATUS_PARAM );
 405 int float64_eq_signaling( float64, float64 STATUS_PARAM );
 406 int float64_le_quiet( float64, float64 STATUS_PARAM );
 407 int float64_lt_quiet( float64, float64 STATUS_PARAM );
 408 int float64_compare( float64, float64 STATUS_PARAM );
 409 int float64_compare_quiet( float64, float64 STATUS_PARAM );
 410 int float64_is_quiet_nan( float64 a );
 411 int float64_is_signaling_nan( float64 );
 412 float64 float64_maybe_silence_nan( float64 );
 413 float64 float64_scalbn( float64, int STATUS_PARAM );
 414
 415 INLINE float64 float64_abs(float64 a)
 416 {
 417     /* Note that abs does *not* handle NaN specially, nor does
 418      * it flush denormal inputs to zero.
 419      */
 420     return make_float64(float64_val(a) & 0x7fffffffffffffffLL);
 421 }
 422
 423 INLINE float64 float64_chs(float64 a)
 424 {
 425     /* Note that chs does *not* handle NaN specially, nor does
 426      * it flush denormal inputs to zero.
 427      */
 428     return make_float64(float64_val(a) ^ 0x8000000000000000LL);
 429 }
 430
 431 INLINE int float64_is_infinity(float64 a)
 432 {
 433     return (float64_val(a) & 0x7fffffffffffffffLL ) == 0x7ff0000000000000LL;
 434 }
 435
 436 INLINE int float64_is_neg(float64 a)
 437 {
 438     return float64_val(a) >> 63;
 439 }
 440
 441 INLINE int float64_is_zero(float64 a)
 442 {
 443     return (float64_val(a) & 0x7fffffffffffffffLL) == 0;
 444 }
 445
 446 INLINE int float64_is_any_nan(float64 a)
 447 {
 448     return ((float64_val(a) & ~(1ULL << 63)) > 0x7ff0000000000000ULL);
 449 }
 450
 451 #define float64_zero make_float64(0)
 452 #define float64_one make_float64(0x3ff0000000000000LL)
 453 #define float64_ln2 make_float64(0x3fe62e42fefa39efLL)
 454
 455 #ifdef FLOATX80
 456
 457 /*----------------------------------------------------------------------------
 458 | Software IEC/IEEE extended double-precision conversion routines.
 459 *----------------------------------------------------------------------------*/
 460 int floatx80_to_int32( floatx80 STATUS_PARAM );
 461 int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
 462 int64_t floatx80_to_int64( floatx80 STATUS_PARAM );
 463 int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM );
 464 float32 floatx80_to_float32( floatx80 STATUS_PARAM );
 465 float64 floatx80_to_float64( floatx80 STATUS_PARAM );
 466 #ifdef FLOAT128
 467 float128 floatx80_to_float128( floatx80 STATUS_PARAM );
 468 #endif
 469
 470 /*----------------------------------------------------------------------------
 471 | Software IEC/IEEE extended double-precision operations.
 472 *----------------------------------------------------------------------------*/
 473 floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
 474 floatx80 floatx80_add( floatx80, floatx80 STATUS_PARAM );
 475 floatx80 floatx80_sub( floatx80, floatx80 STATUS_PARAM );
 476 floatx80 floatx80_mul( floatx80, floatx80 STATUS_PARAM );
 477 floatx80 floatx80_div( floatx80, floatx80 STATUS_PARAM );
 478 floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
 479 floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
 480 int floatx80_eq( floatx80, floatx80 STATUS_PARAM );
 481 int floatx80_le( floatx80, floatx80 STATUS_PARAM );
 482 int floatx80_lt( floatx80, floatx80 STATUS_PARAM );
 483 int floatx80_eq_signaling( floatx80, floatx80 STATUS_PARAM );
 484 int floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM );
 485 int floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM );
 486 int floatx80_is_quiet_nan( floatx80 );
 487 int floatx80_is_signaling_nan( floatx80 );
 488 floatx80 floatx80_maybe_silence_nan( floatx80 );
 489 floatx80 floatx80_scalbn( floatx80, int STATUS_PARAM );
 490
 491 INLINE floatx80 floatx80_abs(floatx80 a)
 492 {
 493     a.high &= 0x7fff;
 494     return a;
 495 }
 496
 497 INLINE floatx80 floatx80_chs(floatx80 a)
 498 {
 499     a.high ^= 0x8000;
 500     return a;
 501 }
 502
 503 INLINE int floatx80_is_infinity(floatx80 a)
 504 {
 505     return (a.high & 0x7fff) == 0x7fff && a.low == 0;
 506 }
 507
 508 INLINE int floatx80_is_neg(floatx80 a)
 509 {
 510     return a.high >> 15;
 511 }
 512
 513 INLINE int floatx80_is_zero(floatx80 a)
 514 {
 515     return (a.high & 0x7fff) == 0 && a.low == 0;
 516 }
 517
 518 INLINE int floatx80_is_any_nan(floatx80 a)
 519 {
 520     return ((a.high & 0x7fff) == 0x7fff) && (a.low<<1);
 521 }
 522
 523 #endif
 524
 525 #ifdef FLOAT128
 526
 527 /*----------------------------------------------------------------------------
 528 | Software IEC/IEEE quadruple-precision conversion routines.
 529 *----------------------------------------------------------------------------*/
 530 int float128_to_int32( float128 STATUS_PARAM );
 531 int float128_to_int32_round_to_zero( float128 STATUS_PARAM );
 532 int64_t float128_to_int64( float128 STATUS_PARAM );
 533 int64_t float128_to_int64_round_to_zero( float128 STATUS_PARAM );
 534 float32 float128_to_float32( float128 STATUS_PARAM );
 535 float64 float128_to_float64( float128 STATUS_PARAM );
 536 #ifdef FLOATX80
 537 floatx80 float128_to_floatx80( float128 STATUS_PARAM );
 538 #endif
 539
 540 /*----------------------------------------------------------------------------
 541 | Software IEC/IEEE quadruple-precision operations.
 542 *----------------------------------------------------------------------------*/
 543 float128 float128_round_to_int( float128 STATUS_PARAM );
 544 float128 float128_add( float128, float128 STATUS_PARAM );
 545 float128 float128_sub( float128, float128 STATUS_PARAM );
 546 float128 float128_mul( float128, float128 STATUS_PARAM );
 547 float128 float128_div( float128, float128 STATUS_PARAM );
 548 float128 float128_rem( float128, float128 STATUS_PARAM );
 549 float128 float128_sqrt( float128 STATUS_PARAM );
 550 int float128_eq( float128, float128 STATUS_PARAM );
 551 int float128_le( float128, float128 STATUS_PARAM );
 552 int float128_lt( float128, float128 STATUS_PARAM );
 553 int float128_eq_signaling( float128, float128 STATUS_PARAM );
 554 int float128_le_quiet( float128, float128 STATUS_PARAM );
 555 int float128_lt_quiet( float128, float128 STATUS_PARAM );
 556 int float128_compare( float128, float128 STATUS_PARAM );
 557 int float128_compare_quiet( float128, float128 STATUS_PARAM );
 558 int float128_is_quiet_nan( float128 );
 559 int float128_is_signaling_nan( float128 );
 560 float128 float128_maybe_silence_nan( float128 );
 561 float128 float128_scalbn( float128, int STATUS_PARAM );
 562
 563 INLINE float128 float128_abs(float128 a)
 564 {
 565     a.high &= 0x7fffffffffffffffLL;
 566     return a;
 567 }
 568
 569 INLINE float128 float128_chs(float128 a)
 570 {
 571     a.high ^= 0x8000000000000000LL;
 572     return a;
 573 }
 574
 575 INLINE int float128_is_infinity(float128 a)
 576 {
 577     return (a.high & 0x7fffffffffffffffLL) == 0x7fff000000000000LL && a.low == 0;
 578 }
 579
 580 INLINE int float128_is_neg(float128 a)
 581 {
 582     return a.high >> 63;
 583 }
 584
 585 INLINE int float128_is_zero(float128 a)
 586 {
 587     return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0;
 588 }
 589
 590 INLINE int float128_is_any_nan(float128 a)
 591 {
 592     return ((a.high >> 48) & 0x7fff) == 0x7fff &&
 593         ((a.low != 0) || ((a.high & 0xffffffffffffLL) != 0));
 594 }
 595
 596 #endif
 597
 598 #else /* CONFIG_SOFTFLOAT */
 599
 600 #include "softfloat-native.h"
 601
 602 #endif /* !CONFIG_SOFTFLOAT */
 603
 604 #endif /* !SOFTFLOAT_H */