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 #if defined(TARGET_MIPS) || defined(TARGET_SH4)
  81 #define SNAN_BIT_IS_ONE         1
  82 #else
  83 #define SNAN_BIT_IS_ONE         0
  84 #endif
  85
  86 /*----------------------------------------------------------------------------
  87 | The macro `FLOATX80' must be defined to enable the extended double-precision
  88 | floating-point format `floatx80'.  If this macro is not defined, the
  89 | `floatx80' type will not be defined, and none of the functions that either
  90 | input or output the `floatx80' type will be defined.  The same applies to
  91 | the `FLOAT128' macro and the quadruple-precision format `float128'.
  92 *----------------------------------------------------------------------------*/
  93 #ifdef CONFIG_SOFTFLOAT
  94 /* bit exact soft float support */
  95 #define FLOATX80
  96 #define FLOAT128
  97 #else
  98 /* native float support */
  99 #if (defined(__i386__) || defined(__x86_64__)) && !defined(CONFIG_BSD)
 100 #define FLOATX80
 101 #endif
 102 #endif /* !CONFIG_SOFTFLOAT */
 103
 104 #define STATUS_PARAM , float_status *status
 105 #define STATUS(field) status->field
 106 #define STATUS_VAR , status
 107
 108 /*----------------------------------------------------------------------------
 109 | Software IEC/IEEE floating-point ordering relations
 110 *----------------------------------------------------------------------------*/
 111 enum {
 112     float_relation_less      = -1,
 113     float_relation_equal     =  0,
 114     float_relation_greater   =  1,
 115     float_relation_unordered =  2
 116 };
 117
 118 #ifdef CONFIG_SOFTFLOAT
 119 /*----------------------------------------------------------------------------
 120 | Software IEC/IEEE floating-point types.
 121 *----------------------------------------------------------------------------*/
 122 /* Use structures for soft-float types.  This prevents accidentally mixing
 123    them with native int/float types.  A sufficiently clever compiler and
 124    sane ABI should be able to see though these structs.  However
 125    x86/gcc 3.x seems to struggle a bit, so leave them disabled by default.  */
 126 //#define USE_SOFTFLOAT_STRUCT_TYPES
 127 #ifdef USE_SOFTFLOAT_STRUCT_TYPES
 128 typedef struct {
 129     uint16_t v;
 130 } float16;
 131 #define float16_val(x) (((float16)(x)).v)
 132 #define make_float16(x) __extension__ ({ float16 f16_val = {x}; f16_val; })
 133 #define const_float16(x) { x }
 134 typedef struct {
 135     uint32_t v;
 136 } float32;
 137 /* The cast ensures an error if the wrong type is passed.  */
 138 #define float32_val(x) (((float32)(x)).v)
 139 #define make_float32(x) __extension__ ({ float32 f32_val = {x}; f32_val; })
 140 #define const_float32(x) { x }
 141 typedef struct {
 142     uint64_t v;
 143 } float64;
 144 #define float64_val(x) (((float64)(x)).v)
 145 #define make_float64(x) __extension__ ({ float64 f64_val = {x}; f64_val; })
 146 #define const_float64(x) { x }
 147 #else
 148 typedef uint16_t float16;
 149 typedef uint32_t float32;
 150 typedef uint64_t float64;
 151 #define float16_val(x) (x)
 152 #define float32_val(x) (x)
 153 #define float64_val(x) (x)
 154 #define make_float16(x) (x)
 155 #define make_float32(x) (x)
 156 #define make_float64(x) (x)
 157 #define const_float16(x) (x)
 158 #define const_float32(x) (x)
 159 #define const_float64(x) (x)
 160 #endif
 161 #ifdef FLOATX80
 162 typedef struct {
 163     uint64_t low;
 164     uint16_t high;
 165 } floatx80;
 166 #endif
 167 #ifdef FLOAT128
 168 typedef struct {
 169 #ifdef HOST_WORDS_BIGENDIAN
 170     uint64_t high, low;
 171 #else
 172     uint64_t low, high;
 173 #endif
 174 } float128;
 175 #endif
 176
 177 /*----------------------------------------------------------------------------
 178 | Software IEC/IEEE floating-point underflow tininess-detection mode.
 179 *----------------------------------------------------------------------------*/
 180 enum {
 181     float_tininess_after_rounding  = 0,
 182     float_tininess_before_rounding = 1
 183 };
 184
 185 /*----------------------------------------------------------------------------
 186 | Software IEC/IEEE floating-point rounding mode.
 187 *----------------------------------------------------------------------------*/
 188 enum {
 189     float_round_nearest_even = 0,
 190     float_round_down         = 1,
 191     float_round_up           = 2,
 192     float_round_to_zero      = 3
 193 };
 194
 195 /*----------------------------------------------------------------------------
 196 | Software IEC/IEEE floating-point exception flags.
 197 *----------------------------------------------------------------------------*/
 198 enum {
 199     float_flag_invalid   =  1,
 200     float_flag_divbyzero =  4,
 201     float_flag_overflow  =  8,
 202     float_flag_underflow = 16,
 203     float_flag_inexact   = 32,
 204     float_flag_input_denormal = 64
 205 };
 206
 207 typedef struct float_status {
 208     signed char float_detect_tininess;
 209     signed char float_rounding_mode;
 210     signed char float_exception_flags;
 211 #ifdef FLOATX80
 212     signed char floatx80_rounding_precision;
 213 #endif
 214     /* should denormalised results go to zero and set the inexact flag? */
 215     flag flush_to_zero;
 216     /* should denormalised inputs go to zero and set the input_denormal flag? */
 217     flag flush_inputs_to_zero;
 218     flag default_nan_mode;
 219 } float_status;
 220
 221 void set_float_rounding_mode(int val STATUS_PARAM);
 222 void set_float_exception_flags(int val STATUS_PARAM);
 223 INLINE void set_flush_to_zero(flag val STATUS_PARAM)
 224 {
 225     STATUS(flush_to_zero) = val;
 226 }
 227 INLINE void set_flush_inputs_to_zero(flag val STATUS_PARAM)
 228 {
 229     STATUS(flush_inputs_to_zero) = val;
 230 }
 231 INLINE void set_default_nan_mode(flag val STATUS_PARAM)
 232 {
 233     STATUS(default_nan_mode) = val;
 234 }
 235 INLINE int get_float_exception_flags(float_status *status)
 236 {
 237     return STATUS(float_exception_flags);
 238 }
 239 #ifdef FLOATX80
 240 void set_floatx80_rounding_precision(int val STATUS_PARAM);
 241 #endif
 242
 243 /*----------------------------------------------------------------------------
 244 | Routine to raise any or all of the software IEC/IEEE floating-point
 245 | exception flags.
 246 *----------------------------------------------------------------------------*/
 247 void float_raise( int8 flags STATUS_PARAM);
 248
 249 /*----------------------------------------------------------------------------
 250 | Software IEC/IEEE integer-to-floating-point conversion routines.
 251 *----------------------------------------------------------------------------*/
 252 float32 int32_to_float32( int STATUS_PARAM );
 253 float64 int32_to_float64( int STATUS_PARAM );
 254 float32 uint32_to_float32( unsigned int STATUS_PARAM );
 255 float64 uint32_to_float64( unsigned int STATUS_PARAM );
 256 #ifdef FLOATX80
 257 floatx80 int32_to_floatx80( int STATUS_PARAM );
 258 #endif
 259 #ifdef FLOAT128
 260 float128 int32_to_float128( int STATUS_PARAM );
 261 #endif
 262 float32 int64_to_float32( int64_t STATUS_PARAM );
 263 float32 uint64_to_float32( uint64_t STATUS_PARAM );
 264 float64 int64_to_float64( int64_t STATUS_PARAM );
 265 float64 uint64_to_float64( uint64_t STATUS_PARAM );
 266 #ifdef FLOATX80
 267 floatx80 int64_to_floatx80( int64_t STATUS_PARAM );
 268 #endif
 269 #ifdef FLOAT128
 270 float128 int64_to_float128( int64_t STATUS_PARAM );
 271 #endif
 272
 273 /*----------------------------------------------------------------------------
 274 | Software half-precision conversion routines.
 275 *----------------------------------------------------------------------------*/
 276 float16 float32_to_float16( float32, flag STATUS_PARAM );
 277 float32 float16_to_float32( float16, flag STATUS_PARAM );
 278
 279 /*----------------------------------------------------------------------------
 280 | Software half-precision operations.
 281 *----------------------------------------------------------------------------*/
 282 int float16_is_quiet_nan( float16 );
 283 int float16_is_signaling_nan( float16 );
 284 float16 float16_maybe_silence_nan( float16 );
 285
 286 /*----------------------------------------------------------------------------
 287 | The pattern for a default generated half-precision NaN.
 288 *----------------------------------------------------------------------------*/
 289 #if defined(TARGET_ARM)
 290 #define float16_default_nan make_float16(0x7E00)
 291 #elif SNAN_BIT_IS_ONE
 292 #define float16_default_nan make_float16(0x7DFF)
 293 #else
 294 #define float16_default_nan make_float16(0xFE00)
 295 #endif
 296
 297 /*----------------------------------------------------------------------------
 298 | Software IEC/IEEE single-precision conversion routines.
 299 *----------------------------------------------------------------------------*/
 300 int float32_to_int16_round_to_zero( float32 STATUS_PARAM );
 301 unsigned int float32_to_uint16_round_to_zero( float32 STATUS_PARAM );
 302 int float32_to_int32( float32 STATUS_PARAM );
 303 int float32_to_int32_round_to_zero( float32 STATUS_PARAM );
 304 unsigned int float32_to_uint32( float32 STATUS_PARAM );
 305 unsigned int float32_to_uint32_round_to_zero( float32 STATUS_PARAM );
 306 int64_t float32_to_int64( float32 STATUS_PARAM );
 307 int64_t float32_to_int64_round_to_zero( float32 STATUS_PARAM );
 308 float64 float32_to_float64( float32 STATUS_PARAM );
 309 #ifdef FLOATX80
 310 floatx80 float32_to_floatx80( float32 STATUS_PARAM );
 311 #endif
 312 #ifdef FLOAT128
 313 float128 float32_to_float128( float32 STATUS_PARAM );
 314 #endif
 315
 316 /*----------------------------------------------------------------------------
 317 | Software IEC/IEEE single-precision operations.
 318 *----------------------------------------------------------------------------*/
 319 float32 float32_round_to_int( float32 STATUS_PARAM );
 320 float32 float32_add( float32, float32 STATUS_PARAM );
 321 float32 float32_sub( float32, float32 STATUS_PARAM );
 322 float32 float32_mul( float32, float32 STATUS_PARAM );
 323 float32 float32_div( float32, float32 STATUS_PARAM );
 324 float32 float32_rem( float32, float32 STATUS_PARAM );
 325 float32 float32_sqrt( float32 STATUS_PARAM );
 326 float32 float32_exp2( float32 STATUS_PARAM );
 327 float32 float32_log2( float32 STATUS_PARAM );
 328 int float32_eq( float32, float32 STATUS_PARAM );
 329 int float32_le( float32, float32 STATUS_PARAM );
 330 int float32_lt( float32, float32 STATUS_PARAM );
 331 int float32_eq_signaling( float32, float32 STATUS_PARAM );
 332 int float32_le_quiet( float32, float32 STATUS_PARAM );
 333 int float32_lt_quiet( float32, float32 STATUS_PARAM );
 334 int float32_compare( float32, float32 STATUS_PARAM );
 335 int float32_compare_quiet( float32, float32 STATUS_PARAM );
 336 int float32_is_quiet_nan( float32 );
 337 int float32_is_signaling_nan( float32 );
 338 float32 float32_maybe_silence_nan( float32 );
 339 float32 float32_scalbn( float32, int STATUS_PARAM );
 340
 341 INLINE float32 float32_abs(float32 a)
 342 {
 343     /* Note that abs does *not* handle NaN specially, nor does
 344      * it flush denormal inputs to zero.
 345      */
 346     return make_float32(float32_val(a) & 0x7fffffff);
 347 }
 348
 349 INLINE float32 float32_chs(float32 a)
 350 {
 351     /* Note that chs does *not* handle NaN specially, nor does
 352      * it flush denormal inputs to zero.
 353      */
 354     return make_float32(float32_val(a) ^ 0x80000000);
 355 }
 356
 357 INLINE int float32_is_infinity(float32 a)
 358 {
 359     return (float32_val(a) & 0x7fffffff) == 0x7f800000;
 360 }
 361
 362 INLINE int float32_is_neg(float32 a)
 363 {
 364     return float32_val(a) >> 31;
 365 }
 366
 367 INLINE int float32_is_zero(float32 a)
 368 {
 369     return (float32_val(a) & 0x7fffffff) == 0;
 370 }
 371
 372 INLINE int float32_is_any_nan(float32 a)
 373 {
 374     return ((float32_val(a) & ~(1 << 31)) > 0x7f800000UL);
 375 }
 376
 377 INLINE int float32_is_zero_or_denormal(float32 a)
 378 {
 379     return (float32_val(a) & 0x7f800000) == 0;
 380 }
 381
 382 INLINE float32 float32_set_sign(float32 a, int sign)
 383 {
 384     return make_float32((float32_val(a) & 0x7fffffff) | (sign << 31));
 385 }
 386
 387 #define float32_zero make_float32(0)
 388 #define float32_one make_float32(0x3f800000)
 389 #define float32_ln2 make_float32(0x3f317218)
 390 #define float32_half make_float32(0x3f000000)
 391 #define float32_infinity make_float32(0x7f800000)
 392
 393
 394 /*----------------------------------------------------------------------------
 395 | The pattern for a default generated single-precision NaN.
 396 *----------------------------------------------------------------------------*/
 397 #if defined(TARGET_SPARC)
 398 #define float32_default_nan make_float32(0x7FFFFFFF)
 399 #elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
 400 #define float32_default_nan make_float32(0x7FC00000)
 401 #elif SNAN_BIT_IS_ONE
 402 #define float32_default_nan make_float32(0x7FBFFFFF)
 403 #else
 404 #define float32_default_nan make_float32(0xFFC00000)
 405 #endif
 406
 407 /*----------------------------------------------------------------------------
 408 | Software IEC/IEEE double-precision conversion routines.
 409 *----------------------------------------------------------------------------*/
 410 int float64_to_int16_round_to_zero( float64 STATUS_PARAM );
 411 unsigned int float64_to_uint16_round_to_zero( float64 STATUS_PARAM );
 412 int float64_to_int32( float64 STATUS_PARAM );
 413 int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
 414 unsigned int float64_to_uint32( float64 STATUS_PARAM );
 415 unsigned int float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
 416 int64_t float64_to_int64( float64 STATUS_PARAM );
 417 int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
 418 uint64_t float64_to_uint64 (float64 a STATUS_PARAM);
 419 uint64_t float64_to_uint64_round_to_zero (float64 a STATUS_PARAM);
 420 float32 float64_to_float32( float64 STATUS_PARAM );
 421 #ifdef FLOATX80
 422 floatx80 float64_to_floatx80( float64 STATUS_PARAM );
 423 #endif
 424 #ifdef FLOAT128
 425 float128 float64_to_float128( float64 STATUS_PARAM );
 426 #endif
 427
 428 /*----------------------------------------------------------------------------
 429 | Software IEC/IEEE double-precision operations.
 430 *----------------------------------------------------------------------------*/
 431 float64 float64_round_to_int( float64 STATUS_PARAM );
 432 float64 float64_trunc_to_int( float64 STATUS_PARAM );
 433 float64 float64_add( float64, float64 STATUS_PARAM );
 434 float64 float64_sub( float64, float64 STATUS_PARAM );
 435 float64 float64_mul( float64, float64 STATUS_PARAM );
 436 float64 float64_div( float64, float64 STATUS_PARAM );
 437 float64 float64_rem( float64, float64 STATUS_PARAM );
 438 float64 float64_sqrt( float64 STATUS_PARAM );
 439 float64 float64_log2( float64 STATUS_PARAM );
 440 int float64_eq( float64, float64 STATUS_PARAM );
 441 int float64_le( float64, float64 STATUS_PARAM );
 442 int float64_lt( float64, float64 STATUS_PARAM );
 443 int float64_eq_signaling( float64, float64 STATUS_PARAM );
 444 int float64_le_quiet( float64, float64 STATUS_PARAM );
 445 int float64_lt_quiet( float64, float64 STATUS_PARAM );
 446 int float64_compare( float64, float64 STATUS_PARAM );
 447 int float64_compare_quiet( float64, float64 STATUS_PARAM );
 448 int float64_is_quiet_nan( float64 a );
 449 int float64_is_signaling_nan( float64 );
 450 float64 float64_maybe_silence_nan( float64 );
 451 float64 float64_scalbn( float64, int STATUS_PARAM );
 452
 453 INLINE float64 float64_abs(float64 a)
 454 {
 455     /* Note that abs does *not* handle NaN specially, nor does
 456      * it flush denormal inputs to zero.
 457      */
 458     return make_float64(float64_val(a) & 0x7fffffffffffffffLL);
 459 }
 460
 461 INLINE float64 float64_chs(float64 a)
 462 {
 463     /* Note that chs does *not* handle NaN specially, nor does
 464      * it flush denormal inputs to zero.
 465      */
 466     return make_float64(float64_val(a) ^ 0x8000000000000000LL);
 467 }
 468
 469 INLINE int float64_is_infinity(float64 a)
 470 {
 471     return (float64_val(a) & 0x7fffffffffffffffLL ) == 0x7ff0000000000000LL;
 472 }
 473
 474 INLINE int float64_is_neg(float64 a)
 475 {
 476     return float64_val(a) >> 63;
 477 }
 478
 479 INLINE int float64_is_zero(float64 a)
 480 {
 481     return (float64_val(a) & 0x7fffffffffffffffLL) == 0;
 482 }
 483
 484 INLINE int float64_is_any_nan(float64 a)
 485 {
 486     return ((float64_val(a) & ~(1ULL << 63)) > 0x7ff0000000000000ULL);
 487 }
 488
 489 INLINE float64 float64_set_sign(float64 a, int sign)
 490 {
 491     return make_float64((float64_val(a) & 0x7fffffffffffffffULL)
 492                         | ((int64_t)sign << 63));
 493 }
 494
 495 #define float64_zero make_float64(0)
 496 #define float64_one make_float64(0x3ff0000000000000LL)
 497 #define float64_ln2 make_float64(0x3fe62e42fefa39efLL)
 498 #define float64_half make_float64(0x3fe0000000000000LL)
 499 #define float64_infinity make_float64(0x7ff0000000000000LL)
 500
 501 /*----------------------------------------------------------------------------
 502 | The pattern for a default generated double-precision NaN.
 503 *----------------------------------------------------------------------------*/
 504 #if defined(TARGET_SPARC)
 505 #define float64_default_nan make_float64(LIT64( 0x7FFFFFFFFFFFFFFF ))
 506 #elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
 507 #define float64_default_nan make_float64(LIT64( 0x7FF8000000000000 ))
 508 #elif SNAN_BIT_IS_ONE
 509 #define float64_default_nan make_float64(LIT64( 0x7FF7FFFFFFFFFFFF ))
 510 #else
 511 #define float64_default_nan make_float64(LIT64( 0xFFF8000000000000 ))
 512 #endif
 513
 514 #ifdef FLOATX80
 515
 516 /*----------------------------------------------------------------------------
 517 | Software IEC/IEEE extended double-precision conversion routines.
 518 *----------------------------------------------------------------------------*/
 519 int floatx80_to_int32( floatx80 STATUS_PARAM );
 520 int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
 521 int64_t floatx80_to_int64( floatx80 STATUS_PARAM );
 522 int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM );
 523 float32 floatx80_to_float32( floatx80 STATUS_PARAM );
 524 float64 floatx80_to_float64( floatx80 STATUS_PARAM );
 525 #ifdef FLOAT128
 526 float128 floatx80_to_float128( floatx80 STATUS_PARAM );
 527 #endif
 528
 529 /*----------------------------------------------------------------------------
 530 | Software IEC/IEEE extended double-precision operations.
 531 *----------------------------------------------------------------------------*/
 532 floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
 533 floatx80 floatx80_add( floatx80, floatx80 STATUS_PARAM );
 534 floatx80 floatx80_sub( floatx80, floatx80 STATUS_PARAM );
 535 floatx80 floatx80_mul( floatx80, floatx80 STATUS_PARAM );
 536 floatx80 floatx80_div( floatx80, floatx80 STATUS_PARAM );
 537 floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
 538 floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
 539 int floatx80_eq( floatx80, floatx80 STATUS_PARAM );
 540 int floatx80_le( floatx80, floatx80 STATUS_PARAM );
 541 int floatx80_lt( floatx80, floatx80 STATUS_PARAM );
 542 int floatx80_eq_signaling( floatx80, floatx80 STATUS_PARAM );
 543 int floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM );
 544 int floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM );
 545 int floatx80_is_quiet_nan( floatx80 );
 546 int floatx80_is_signaling_nan( floatx80 );
 547 floatx80 floatx80_maybe_silence_nan( floatx80 );
 548 floatx80 floatx80_scalbn( floatx80, int STATUS_PARAM );
 549
 550 INLINE floatx80 floatx80_abs(floatx80 a)
 551 {
 552     a.high &= 0x7fff;
 553     return a;
 554 }
 555
 556 INLINE floatx80 floatx80_chs(floatx80 a)
 557 {
 558     a.high ^= 0x8000;
 559     return a;
 560 }
 561
 562 INLINE int floatx80_is_infinity(floatx80 a)
 563 {
 564     return (a.high & 0x7fff) == 0x7fff && a.low == 0;
 565 }
 566
 567 INLINE int floatx80_is_neg(floatx80 a)
 568 {
 569     return a.high >> 15;
 570 }
 571
 572 INLINE int floatx80_is_zero(floatx80 a)
 573 {
 574     return (a.high & 0x7fff) == 0 && a.low == 0;
 575 }
 576
 577 INLINE int floatx80_is_any_nan(floatx80 a)
 578 {
 579     return ((a.high & 0x7fff) == 0x7fff) && (a.low<<1);
 580 }
 581
 582 /*----------------------------------------------------------------------------
 583 | The pattern for a default generated extended double-precision NaN.  The
 584 | `high' and `low' values hold the most- and least-significant bits,
 585 | respectively.
 586 *----------------------------------------------------------------------------*/
 587 #if SNAN_BIT_IS_ONE
 588 #define floatx80_default_nan_high 0x7FFF
 589 #define floatx80_default_nan_low  LIT64( 0xBFFFFFFFFFFFFFFF )
 590 #else
 591 #define floatx80_default_nan_high 0xFFFF
 592 #define floatx80_default_nan_low  LIT64( 0xC000000000000000 )
 593 #endif
 594
 595 #endif
 596
 597 #ifdef FLOAT128
 598
 599 /*----------------------------------------------------------------------------
 600 | Software IEC/IEEE quadruple-precision conversion routines.
 601 *----------------------------------------------------------------------------*/
 602 int float128_to_int32( float128 STATUS_PARAM );
 603 int float128_to_int32_round_to_zero( float128 STATUS_PARAM );
 604 int64_t float128_to_int64( float128 STATUS_PARAM );
 605 int64_t float128_to_int64_round_to_zero( float128 STATUS_PARAM );
 606 float32 float128_to_float32( float128 STATUS_PARAM );
 607 float64 float128_to_float64( float128 STATUS_PARAM );
 608 #ifdef FLOATX80
 609 floatx80 float128_to_floatx80( float128 STATUS_PARAM );
 610 #endif
 611
 612 /*----------------------------------------------------------------------------
 613 | Software IEC/IEEE quadruple-precision operations.
 614 *----------------------------------------------------------------------------*/
 615 float128 float128_round_to_int( float128 STATUS_PARAM );
 616 float128 float128_add( float128, float128 STATUS_PARAM );
 617 float128 float128_sub( float128, float128 STATUS_PARAM );
 618 float128 float128_mul( float128, float128 STATUS_PARAM );
 619 float128 float128_div( float128, float128 STATUS_PARAM );
 620 float128 float128_rem( float128, float128 STATUS_PARAM );
 621 float128 float128_sqrt( float128 STATUS_PARAM );
 622 int float128_eq( float128, float128 STATUS_PARAM );
 623 int float128_le( float128, float128 STATUS_PARAM );
 624 int float128_lt( float128, float128 STATUS_PARAM );
 625 int float128_eq_signaling( float128, float128 STATUS_PARAM );
 626 int float128_le_quiet( float128, float128 STATUS_PARAM );
 627 int float128_lt_quiet( float128, float128 STATUS_PARAM );
 628 int float128_compare( float128, float128 STATUS_PARAM );
 629 int float128_compare_quiet( float128, float128 STATUS_PARAM );
 630 int float128_is_quiet_nan( float128 );
 631 int float128_is_signaling_nan( float128 );
 632 float128 float128_maybe_silence_nan( float128 );
 633 float128 float128_scalbn( float128, int STATUS_PARAM );
 634
 635 INLINE float128 float128_abs(float128 a)
 636 {
 637     a.high &= 0x7fffffffffffffffLL;
 638     return a;
 639 }
 640
 641 INLINE float128 float128_chs(float128 a)
 642 {
 643     a.high ^= 0x8000000000000000LL;
 644     return a;
 645 }
 646
 647 INLINE int float128_is_infinity(float128 a)
 648 {
 649     return (a.high & 0x7fffffffffffffffLL) == 0x7fff000000000000LL && a.low == 0;
 650 }
 651
 652 INLINE int float128_is_neg(float128 a)
 653 {
 654     return a.high >> 63;
 655 }
 656
 657 INLINE int float128_is_zero(float128 a)
 658 {
 659     return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0;
 660 }
 661
 662 INLINE int float128_is_any_nan(float128 a)
 663 {
 664     return ((a.high >> 48) & 0x7fff) == 0x7fff &&
 665         ((a.low != 0) || ((a.high & 0xffffffffffffLL) != 0));
 666 }
 667
 668 /*----------------------------------------------------------------------------
 669 | The pattern for a default generated quadruple-precision NaN.  The `high' and
 670 | `low' values hold the most- and least-significant bits, respectively.
 671 *----------------------------------------------------------------------------*/
 672 #if SNAN_BIT_IS_ONE
 673 #define float128_default_nan_high LIT64( 0x7FFF7FFFFFFFFFFF )
 674 #define float128_default_nan_low  LIT64( 0xFFFFFFFFFFFFFFFF )
 675 #else
 676 #define float128_default_nan_high LIT64( 0xFFFF800000000000 )
 677 #define float128_default_nan_low  LIT64( 0x0000000000000000 )
 678 #endif
 679
 680 #endif
 681
 682 #else /* CONFIG_SOFTFLOAT */
 683
 684 #include "softfloat-native.h"
 685
 686 #endif /* !CONFIG_SOFTFLOAT */
 687
 688 #endif /* !SOFTFLOAT_H */