fpu/softfloat.h

   1 /*
   2  * QEMU float support
   3  *
   4  * Derived from SoftFloat.
   5  */
   6
   7 /*============================================================================
   8
   9 This C header file is part of the SoftFloat IEC/IEEE Floating-point Arithmetic
  10 Package, Release 2b.
  11
  12 Written by John R. Hauser.  This work was made possible in part by the
  13 International Computer Science Institute, located at Suite 600, 1947 Center
  14 Street, Berkeley, California 94704.  Funding was partially provided by the
  15 National Science Foundation under grant MIP-9311980.  The original version
  16 of this code was written as part of a project to build a fixed-point vector
  17 processor in collaboration with the University of California at Berkeley,
  18 overseen by Profs. Nelson Morgan and John Wawrzynek.  More information
  19 is available through the Web page `http://www.cs.berkeley.edu/~jhauser/
  20 arithmetic/SoftFloat.html'.
  21
  22 THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE.  Although reasonable effort has
  23 been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT TIMES
  24 RESULT IN INCORRECT BEHAVIOR.  USE OF THIS SOFTWARE IS RESTRICTED TO PERSONS
  25 AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ALL LOSSES,
  26 COSTS, OR OTHER PROBLEMS THEY INCUR DUE TO THE SOFTWARE, AND WHO FURTHERMORE
  27 EFFECTIVELY INDEMNIFY JOHN HAUSER AND THE INTERNATIONAL COMPUTER SCIENCE
  28 INSTITUTE (possibly via similar legal warning) AGAINST ALL LOSSES, COSTS, OR
  29 OTHER PROBLEMS INCURRED BY THEIR CUSTOMERS AND CLIENTS DUE TO THE SOFTWARE.
  30
  31 Derivative works are acceptable, even for commercial purposes, so long as
  32 (1) the source code for the derivative work includes prominent notice that
  33 the work is derivative, and (2) the source code includes prominent notice with
  34 these four paragraphs for those parts of this code that are retained.
  35
  36 =============================================================================*/
  37
  38 #ifndef SOFTFLOAT_H
  39 #define SOFTFLOAT_H
  40
  41 #if defined(CONFIG_SOLARIS) && defined(CONFIG_NEEDS_LIBSUNMATH)
  42 #include <sunmath.h>
  43 #endif
  44
  45 #include <inttypes.h>
  46 #include "config.h"
  47
  48 /*----------------------------------------------------------------------------
  49 | Each of the following `typedef's defines the most convenient type that holds
  50 | integers of at least as many bits as specified.  For example, `uint8' should
  51 | be the most convenient type that can hold unsigned integers of as many as
  52 | 8 bits.  The `flag' type must be able to hold either a 0 or 1.  For most
  53 | implementations of C, `flag', `uint8', and `int8' should all be `typedef'ed
  54 | to the same as `int'.
  55 *----------------------------------------------------------------------------*/
  56 typedef uint8_t flag;
  57 typedef uint8_t uint8;
  58 typedef int8_t int8;
  59 #ifndef _AIX
  60 typedef int uint16;
  61 typedef int int16;
  62 #endif
  63 typedef unsigned int uint32;
  64 typedef signed int int32;
  65 typedef uint64_t uint64;
  66 typedef int64_t int64;
  67
  68 #define LIT64( a ) a##LL
  69 #define INLINE static inline
  70
  71 #if defined(TARGET_MIPS) || defined(TARGET_SH4) || defined(TARGET_UNICORE32)
  72 #define SNAN_BIT_IS_ONE         1
  73 #else
  74 #define SNAN_BIT_IS_ONE         0
  75 #endif
  76
  77 /*----------------------------------------------------------------------------
  78 | The macro `FLOATX80' must be defined to enable the extended double-precision
  79 | floating-point format `floatx80'.  If this macro is not defined, the
  80 | `floatx80' type will not be defined, and none of the functions that either
  81 | input or output the `floatx80' type will be defined.  The same applies to
  82 | the `FLOAT128' macro and the quadruple-precision format `float128'.
  83 *----------------------------------------------------------------------------*/
  84 #ifdef CONFIG_SOFTFLOAT
  85 /* bit exact soft float support */
  86 #define FLOATX80
  87 #define FLOAT128
  88 #else
  89 /* native float support */
  90 #if (defined(__i386__) || defined(__x86_64__)) && !defined(CONFIG_BSD)
  91 #define FLOATX80
  92 #endif
  93 #endif /* !CONFIG_SOFTFLOAT */
  94
  95 #define STATUS_PARAM , float_status *status
  96 #define STATUS(field) status->field
  97 #define STATUS_VAR , status
  98
  99 /*----------------------------------------------------------------------------
 100 | Software IEC/IEEE floating-point ordering relations
 101 *----------------------------------------------------------------------------*/
 102 enum {
 103     float_relation_less      = -1,
 104     float_relation_equal     =  0,
 105     float_relation_greater   =  1,
 106     float_relation_unordered =  2
 107 };
 108
 109 #ifdef CONFIG_SOFTFLOAT
 110 /*----------------------------------------------------------------------------
 111 | Software IEC/IEEE floating-point types.
 112 *----------------------------------------------------------------------------*/
 113 /* Use structures for soft-float types.  This prevents accidentally mixing
 114    them with native int/float types.  A sufficiently clever compiler and
 115    sane ABI should be able to see though these structs.  However
 116    x86/gcc 3.x seems to struggle a bit, so leave them disabled by default.  */
 117 //#define USE_SOFTFLOAT_STRUCT_TYPES
 118 #ifdef USE_SOFTFLOAT_STRUCT_TYPES
 119 typedef struct {
 120     uint16_t v;
 121 } float16;
 122 #define float16_val(x) (((float16)(x)).v)
 123 #define make_float16(x) __extension__ ({ float16 f16_val = {x}; f16_val; })
 124 #define const_float16(x) { x }
 125 typedef struct {
 126     uint32_t v;
 127 } float32;
 128 /* The cast ensures an error if the wrong type is passed.  */
 129 #define float32_val(x) (((float32)(x)).v)
 130 #define make_float32(x) __extension__ ({ float32 f32_val = {x}; f32_val; })
 131 #define const_float32(x) { x }
 132 typedef struct {
 133     uint64_t v;
 134 } float64;
 135 #define float64_val(x) (((float64)(x)).v)
 136 #define make_float64(x) __extension__ ({ float64 f64_val = {x}; f64_val; })
 137 #define const_float64(x) { x }
 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 #define const_float16(x) (x)
 149 #define const_float32(x) (x)
 150 #define const_float64(x) (x)
 151 #endif
 152 #ifdef FLOATX80
 153 typedef struct {
 154     uint64_t low;
 155     uint16_t high;
 156 } floatx80;
 157 #endif
 158 #ifdef FLOAT128
 159 typedef struct {
 160 #ifdef HOST_WORDS_BIGENDIAN
 161     uint64_t high, low;
 162 #else
 163     uint64_t low, high;
 164 #endif
 165 } float128;
 166 #endif
 167
 168 /*----------------------------------------------------------------------------
 169 | Software IEC/IEEE floating-point underflow tininess-detection mode.
 170 *----------------------------------------------------------------------------*/
 171 enum {
 172     float_tininess_after_rounding  = 0,
 173     float_tininess_before_rounding = 1
 174 };
 175
 176 /*----------------------------------------------------------------------------
 177 | Software IEC/IEEE floating-point rounding mode.
 178 *----------------------------------------------------------------------------*/
 179 enum {
 180     float_round_nearest_even = 0,
 181     float_round_down         = 1,
 182     float_round_up           = 2,
 183     float_round_to_zero      = 3
 184 };
 185
 186 /*----------------------------------------------------------------------------
 187 | Software IEC/IEEE floating-point exception flags.
 188 *----------------------------------------------------------------------------*/
 189 enum {
 190     float_flag_invalid   =  1,
 191     float_flag_divbyzero =  4,
 192     float_flag_overflow  =  8,
 193     float_flag_underflow = 16,
 194     float_flag_inexact   = 32,
 195     float_flag_input_denormal = 64
 196 };
 197
 198 typedef struct float_status {
 199     signed char float_detect_tininess;
 200     signed char float_rounding_mode;
 201     signed char float_exception_flags;
 202 #ifdef FLOATX80
 203     signed char floatx80_rounding_precision;
 204 #endif
 205     /* should denormalised results go to zero and set the inexact flag? */
 206     flag flush_to_zero;
 207     /* should denormalised inputs go to zero and set the input_denormal flag? */
 208     flag flush_inputs_to_zero;
 209     flag default_nan_mode;
 210 } float_status;
 211
 212 void set_float_rounding_mode(int val STATUS_PARAM);
 213 void set_float_exception_flags(int val STATUS_PARAM);
 214 INLINE void set_float_detect_tininess(int val STATUS_PARAM)
 215 {
 216     STATUS(float_detect_tininess) = val;
 217 }
 218 INLINE void set_flush_to_zero(flag val STATUS_PARAM)
 219 {
 220     STATUS(flush_to_zero) = val;
 221 }
 222 INLINE void set_flush_inputs_to_zero(flag val STATUS_PARAM)
 223 {
 224     STATUS(flush_inputs_to_zero) = val;
 225 }
 226 INLINE void set_default_nan_mode(flag val STATUS_PARAM)
 227 {
 228     STATUS(default_nan_mode) = val;
 229 }
 230 INLINE int get_float_exception_flags(float_status *status)
 231 {
 232     return STATUS(float_exception_flags);
 233 }
 234 #ifdef FLOATX80
 235 void set_floatx80_rounding_precision(int val STATUS_PARAM);
 236 #endif
 237
 238 /*----------------------------------------------------------------------------
 239 | Routine to raise any or all of the software IEC/IEEE floating-point
 240 | exception flags.
 241 *----------------------------------------------------------------------------*/
 242 void float_raise( int8 flags STATUS_PARAM);
 243
 244 /*----------------------------------------------------------------------------
 245 | Software IEC/IEEE integer-to-floating-point conversion routines.
 246 *----------------------------------------------------------------------------*/
 247 float32 int32_to_float32( int32 STATUS_PARAM );
 248 float64 int32_to_float64( int32 STATUS_PARAM );
 249 float32 uint32_to_float32( unsigned int STATUS_PARAM );
 250 float64 uint32_to_float64( unsigned int STATUS_PARAM );
 251 #ifdef FLOATX80
 252 floatx80 int32_to_floatx80( int32 STATUS_PARAM );
 253 #endif
 254 #ifdef FLOAT128
 255 float128 int32_to_float128( int32 STATUS_PARAM );
 256 #endif
 257 float32 int64_to_float32( int64 STATUS_PARAM );
 258 float32 uint64_to_float32( uint64 STATUS_PARAM );
 259 float64 int64_to_float64( int64 STATUS_PARAM );
 260 float64 uint64_to_float64( uint64 STATUS_PARAM );
 261 #ifdef FLOATX80
 262 floatx80 int64_to_floatx80( int64 STATUS_PARAM );
 263 #endif
 264 #ifdef FLOAT128
 265 float128 int64_to_float128( int64 STATUS_PARAM );
 266 #endif
 267
 268 /*----------------------------------------------------------------------------
 269 | Software half-precision conversion routines.
 270 *----------------------------------------------------------------------------*/
 271 float16 float32_to_float16( float32, flag STATUS_PARAM );
 272 float32 float16_to_float32( float16, flag STATUS_PARAM );
 273
 274 /*----------------------------------------------------------------------------
 275 | Software half-precision operations.
 276 *----------------------------------------------------------------------------*/
 277 int float16_is_quiet_nan( float16 );
 278 int float16_is_signaling_nan( float16 );
 279 float16 float16_maybe_silence_nan( float16 );
 280
 281 /*----------------------------------------------------------------------------
 282 | The pattern for a default generated half-precision NaN.
 283 *----------------------------------------------------------------------------*/
 284 #if defined(TARGET_ARM)
 285 #define float16_default_nan make_float16(0x7E00)
 286 #elif SNAN_BIT_IS_ONE
 287 #define float16_default_nan make_float16(0x7DFF)
 288 #else
 289 #define float16_default_nan make_float16(0xFE00)
 290 #endif
 291
 292 /*----------------------------------------------------------------------------
 293 | Software IEC/IEEE single-precision conversion routines.
 294 *----------------------------------------------------------------------------*/
 295 int16 float32_to_int16_round_to_zero( float32 STATUS_PARAM );
 296 unsigned int float32_to_uint16_round_to_zero( float32 STATUS_PARAM );
 297 int32 float32_to_int32( float32 STATUS_PARAM );
 298 int32 float32_to_int32_round_to_zero( float32 STATUS_PARAM );
 299 uint32 float32_to_uint32( float32 STATUS_PARAM );
 300 uint32 float32_to_uint32_round_to_zero( float32 STATUS_PARAM );
 301 int64 float32_to_int64( float32 STATUS_PARAM );
 302 int64 float32_to_int64_round_to_zero( float32 STATUS_PARAM );
 303 float64 float32_to_float64( float32 STATUS_PARAM );
 304 #ifdef FLOATX80
 305 floatx80 float32_to_floatx80( float32 STATUS_PARAM );
 306 #endif
 307 #ifdef FLOAT128
 308 float128 float32_to_float128( float32 STATUS_PARAM );
 309 #endif
 310
 311 /*----------------------------------------------------------------------------
 312 | Software IEC/IEEE single-precision operations.
 313 *----------------------------------------------------------------------------*/
 314 float32 float32_round_to_int( float32 STATUS_PARAM );
 315 float32 float32_add( float32, float32 STATUS_PARAM );
 316 float32 float32_sub( float32, float32 STATUS_PARAM );
 317 float32 float32_mul( float32, float32 STATUS_PARAM );
 318 float32 float32_div( float32, float32 STATUS_PARAM );
 319 float32 float32_rem( float32, float32 STATUS_PARAM );
 320 float32 float32_sqrt( float32 STATUS_PARAM );
 321 float32 float32_exp2( float32 STATUS_PARAM );
 322 float32 float32_log2( float32 STATUS_PARAM );
 323 int float32_eq( float32, float32 STATUS_PARAM );
 324 int float32_le( float32, float32 STATUS_PARAM );
 325 int float32_lt( float32, float32 STATUS_PARAM );
 326 int float32_eq_signaling( float32, float32 STATUS_PARAM );
 327 int float32_le_quiet( float32, float32 STATUS_PARAM );
 328 int float32_lt_quiet( float32, float32 STATUS_PARAM );
 329 int float32_compare( float32, float32 STATUS_PARAM );
 330 int float32_compare_quiet( float32, float32 STATUS_PARAM );
 331 float32 float32_min(float32, float32 STATUS_PARAM);
 332 float32 float32_max(float32, float32 STATUS_PARAM);
 333 int float32_is_quiet_nan( float32 );
 334 int float32_is_signaling_nan( float32 );
 335 float32 float32_maybe_silence_nan( float32 );
 336 float32 float32_scalbn( float32, int STATUS_PARAM );
 337
 338 INLINE float32 float32_abs(float32 a)
 339 {
 340     /* Note that abs does *not* handle NaN specially, nor does
 341      * it flush denormal inputs to zero.
 342      */
 343     return make_float32(float32_val(a) & 0x7fffffff);
 344 }
 345
 346 INLINE float32 float32_chs(float32 a)
 347 {
 348     /* Note that chs does *not* handle NaN specially, nor does
 349      * it flush denormal inputs to zero.
 350      */
 351     return make_float32(float32_val(a) ^ 0x80000000);
 352 }
 353
 354 INLINE int float32_is_infinity(float32 a)
 355 {
 356     return (float32_val(a) & 0x7fffffff) == 0x7f800000;
 357 }
 358
 359 INLINE int float32_is_neg(float32 a)
 360 {
 361     return float32_val(a) >> 31;
 362 }
 363
 364 INLINE int float32_is_zero(float32 a)
 365 {
 366     return (float32_val(a) & 0x7fffffff) == 0;
 367 }
 368
 369 INLINE int float32_is_any_nan(float32 a)
 370 {
 371     return ((float32_val(a) & ~(1 << 31)) > 0x7f800000UL);
 372 }
 373
 374 INLINE int float32_is_zero_or_denormal(float32 a)
 375 {
 376     return (float32_val(a) & 0x7f800000) == 0;
 377 }
 378
 379 INLINE float32 float32_set_sign(float32 a, int sign)
 380 {
 381     return make_float32((float32_val(a) & 0x7fffffff) | (sign << 31));
 382 }
 383
 384 #define float32_zero make_float32(0)
 385 #define float32_one make_float32(0x3f800000)
 386 #define float32_ln2 make_float32(0x3f317218)
 387 #define float32_half make_float32(0x3f000000)
 388 #define float32_infinity make_float32(0x7f800000)
 389
 390
 391 /*----------------------------------------------------------------------------
 392 | The pattern for a default generated single-precision NaN.
 393 *----------------------------------------------------------------------------*/
 394 #if defined(TARGET_SPARC)
 395 #define float32_default_nan make_float32(0x7FFFFFFF)
 396 #elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
 397 #define float32_default_nan make_float32(0x7FC00000)
 398 #elif SNAN_BIT_IS_ONE
 399 #define float32_default_nan make_float32(0x7FBFFFFF)
 400 #else
 401 #define float32_default_nan make_float32(0xFFC00000)
 402 #endif
 403
 404 /*----------------------------------------------------------------------------
 405 | Software IEC/IEEE double-precision conversion routines.
 406 *----------------------------------------------------------------------------*/
 407 int16 float64_to_int16_round_to_zero( float64 STATUS_PARAM );
 408 unsigned int float64_to_uint16_round_to_zero( float64 STATUS_PARAM );
 409 int32 float64_to_int32( float64 STATUS_PARAM );
 410 int32 float64_to_int32_round_to_zero( float64 STATUS_PARAM );
 411 uint32 float64_to_uint32( float64 STATUS_PARAM );
 412 uint32 float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
 413 int64 float64_to_int64( float64 STATUS_PARAM );
 414 int64 float64_to_int64_round_to_zero( float64 STATUS_PARAM );
 415 uint64 float64_to_uint64 (float64 a STATUS_PARAM);
 416 uint64 float64_to_uint64_round_to_zero (float64 a STATUS_PARAM);
 417 float32 float64_to_float32( float64 STATUS_PARAM );
 418 #ifdef FLOATX80
 419 floatx80 float64_to_floatx80( float64 STATUS_PARAM );
 420 #endif
 421 #ifdef FLOAT128
 422 float128 float64_to_float128( float64 STATUS_PARAM );
 423 #endif
 424
 425 /*----------------------------------------------------------------------------
 426 | Software IEC/IEEE double-precision operations.
 427 *----------------------------------------------------------------------------*/
 428 float64 float64_round_to_int( float64 STATUS_PARAM );
 429 float64 float64_trunc_to_int( float64 STATUS_PARAM );
 430 float64 float64_add( float64, float64 STATUS_PARAM );
 431 float64 float64_sub( float64, float64 STATUS_PARAM );
 432 float64 float64_mul( float64, float64 STATUS_PARAM );
 433 float64 float64_div( float64, float64 STATUS_PARAM );
 434 float64 float64_rem( float64, float64 STATUS_PARAM );
 435 float64 float64_sqrt( float64 STATUS_PARAM );
 436 float64 float64_log2( float64 STATUS_PARAM );
 437 int float64_eq( float64, float64 STATUS_PARAM );
 438 int float64_le( float64, float64 STATUS_PARAM );
 439 int float64_lt( float64, float64 STATUS_PARAM );
 440 int float64_eq_signaling( float64, float64 STATUS_PARAM );
 441 int float64_le_quiet( float64, float64 STATUS_PARAM );
 442 int float64_lt_quiet( float64, float64 STATUS_PARAM );
 443 int float64_compare( float64, float64 STATUS_PARAM );
 444 int float64_compare_quiet( float64, float64 STATUS_PARAM );
 445 float64 float64_min(float64, float64 STATUS_PARAM);
 446 float64 float64_max(float64, float64 STATUS_PARAM);
 447 int float64_is_quiet_nan( float64 a );
 448 int float64_is_signaling_nan( float64 );
 449 float64 float64_maybe_silence_nan( float64 );
 450 float64 float64_scalbn( float64, int STATUS_PARAM );
 451
 452 INLINE float64 float64_abs(float64 a)
 453 {
 454     /* Note that abs does *not* handle NaN specially, nor does
 455      * it flush denormal inputs to zero.
 456      */
 457     return make_float64(float64_val(a) & 0x7fffffffffffffffLL);
 458 }
 459
 460 INLINE float64 float64_chs(float64 a)
 461 {
 462     /* Note that chs does *not* handle NaN specially, nor does
 463      * it flush denormal inputs to zero.
 464      */
 465     return make_float64(float64_val(a) ^ 0x8000000000000000LL);
 466 }
 467
 468 INLINE int float64_is_infinity(float64 a)
 469 {
 470     return (float64_val(a) & 0x7fffffffffffffffLL ) == 0x7ff0000000000000LL;
 471 }
 472
 473 INLINE int float64_is_neg(float64 a)
 474 {
 475     return float64_val(a) >> 63;
 476 }
 477
 478 INLINE int float64_is_zero(float64 a)
 479 {
 480     return (float64_val(a) & 0x7fffffffffffffffLL) == 0;
 481 }
 482
 483 INLINE int float64_is_any_nan(float64 a)
 484 {
 485     return ((float64_val(a) & ~(1ULL << 63)) > 0x7ff0000000000000ULL);
 486 }
 487
 488 INLINE float64 float64_set_sign(float64 a, int sign)
 489 {
 490     return make_float64((float64_val(a) & 0x7fffffffffffffffULL)
 491                         | ((int64_t)sign << 63));
 492 }
 493
 494 #define float64_zero make_float64(0)
 495 #define float64_one make_float64(0x3ff0000000000000LL)
 496 #define float64_ln2 make_float64(0x3fe62e42fefa39efLL)
 497 #define float64_half make_float64(0x3fe0000000000000LL)
 498 #define float64_infinity make_float64(0x7ff0000000000000LL)
 499
 500 /*----------------------------------------------------------------------------
 501 | The pattern for a default generated double-precision NaN.
 502 *----------------------------------------------------------------------------*/
 503 #if defined(TARGET_SPARC)
 504 #define float64_default_nan make_float64(LIT64( 0x7FFFFFFFFFFFFFFF ))
 505 #elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
 506 #define float64_default_nan make_float64(LIT64( 0x7FF8000000000000 ))
 507 #elif SNAN_BIT_IS_ONE
 508 #define float64_default_nan make_float64(LIT64( 0x7FF7FFFFFFFFFFFF ))
 509 #else
 510 #define float64_default_nan make_float64(LIT64( 0xFFF8000000000000 ))
 511 #endif
 512
 513 #ifdef FLOATX80
 514
 515 /*----------------------------------------------------------------------------
 516 | Software IEC/IEEE extended double-precision conversion routines.
 517 *----------------------------------------------------------------------------*/
 518 int32 floatx80_to_int32( floatx80 STATUS_PARAM );
 519 int32 floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
 520 int64 floatx80_to_int64( floatx80 STATUS_PARAM );
 521 int64 floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM );
 522 float32 floatx80_to_float32( floatx80 STATUS_PARAM );
 523 float64 floatx80_to_float64( floatx80 STATUS_PARAM );
 524 #ifdef FLOAT128
 525 float128 floatx80_to_float128( floatx80 STATUS_PARAM );
 526 #endif
 527
 528 /*----------------------------------------------------------------------------
 529 | Software IEC/IEEE extended double-precision operations.
 530 *----------------------------------------------------------------------------*/
 531 floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
 532 floatx80 floatx80_add( floatx80, floatx80 STATUS_PARAM );
 533 floatx80 floatx80_sub( floatx80, floatx80 STATUS_PARAM );
 534 floatx80 floatx80_mul( floatx80, floatx80 STATUS_PARAM );
 535 floatx80 floatx80_div( floatx80, floatx80 STATUS_PARAM );
 536 floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
 537 floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
 538 int floatx80_eq( floatx80, floatx80 STATUS_PARAM );
 539 int floatx80_le( floatx80, floatx80 STATUS_PARAM );
 540 int floatx80_lt( floatx80, floatx80 STATUS_PARAM );
 541 int floatx80_eq_signaling( floatx80, floatx80 STATUS_PARAM );
 542 int floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM );
 543 int floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM );
 544 int floatx80_is_quiet_nan( floatx80 );
 545 int floatx80_is_signaling_nan( floatx80 );
 546 floatx80 floatx80_maybe_silence_nan( floatx80 );
 547 floatx80 floatx80_scalbn( floatx80, int STATUS_PARAM );
 548
 549 INLINE floatx80 floatx80_abs(floatx80 a)
 550 {
 551     a.high &= 0x7fff;
 552     return a;
 553 }
 554
 555 INLINE floatx80 floatx80_chs(floatx80 a)
 556 {
 557     a.high ^= 0x8000;
 558     return a;
 559 }
 560
 561 INLINE int floatx80_is_infinity(floatx80 a)
 562 {
 563     return (a.high & 0x7fff) == 0x7fff && a.low == 0;
 564 }
 565
 566 INLINE int floatx80_is_neg(floatx80 a)
 567 {
 568     return a.high >> 15;
 569 }
 570
 571 INLINE int floatx80_is_zero(floatx80 a)
 572 {
 573     return (a.high & 0x7fff) == 0 && a.low == 0;
 574 }
 575
 576 INLINE int floatx80_is_any_nan(floatx80 a)
 577 {
 578     return ((a.high & 0x7fff) == 0x7fff) && (a.low<<1);
 579 }
 580
 581 /*----------------------------------------------------------------------------
 582 | The pattern for a default generated extended double-precision NaN.  The
 583 | `high' and `low' values hold the most- and least-significant bits,
 584 | respectively.
 585 *----------------------------------------------------------------------------*/
 586 #if SNAN_BIT_IS_ONE
 587 #define floatx80_default_nan_high 0x7FFF
 588 #define floatx80_default_nan_low  LIT64( 0xBFFFFFFFFFFFFFFF )
 589 #else
 590 #define floatx80_default_nan_high 0xFFFF
 591 #define floatx80_default_nan_low  LIT64( 0xC000000000000000 )
 592 #endif
 593
 594 #endif
 595
 596 #ifdef FLOAT128
 597
 598 /*----------------------------------------------------------------------------
 599 | Software IEC/IEEE quadruple-precision conversion routines.
 600 *----------------------------------------------------------------------------*/
 601 int32 float128_to_int32( float128 STATUS_PARAM );
 602 int32 float128_to_int32_round_to_zero( float128 STATUS_PARAM );
 603 int64 float128_to_int64( float128 STATUS_PARAM );
 604 int64 float128_to_int64_round_to_zero( float128 STATUS_PARAM );
 605 float32 float128_to_float32( float128 STATUS_PARAM );
 606 float64 float128_to_float64( float128 STATUS_PARAM );
 607 #ifdef FLOATX80
 608 floatx80 float128_to_floatx80( float128 STATUS_PARAM );
 609 #endif
 610
 611 /*----------------------------------------------------------------------------
 612 | Software IEC/IEEE quadruple-precision operations.
 613 *----------------------------------------------------------------------------*/
 614 float128 float128_round_to_int( float128 STATUS_PARAM );
 615 float128 float128_add( float128, float128 STATUS_PARAM );
 616 float128 float128_sub( float128, float128 STATUS_PARAM );
 617 float128 float128_mul( float128, float128 STATUS_PARAM );
 618 float128 float128_div( float128, float128 STATUS_PARAM );
 619 float128 float128_rem( float128, float128 STATUS_PARAM );
 620 float128 float128_sqrt( float128 STATUS_PARAM );
 621 int float128_eq( float128, float128 STATUS_PARAM );
 622 int float128_le( float128, float128 STATUS_PARAM );
 623 int float128_lt( float128, float128 STATUS_PARAM );
 624 int float128_eq_signaling( float128, float128 STATUS_PARAM );
 625 int float128_le_quiet( float128, float128 STATUS_PARAM );
 626 int float128_lt_quiet( float128, float128 STATUS_PARAM );
 627 int float128_compare( float128, float128 STATUS_PARAM );
 628 int float128_compare_quiet( float128, float128 STATUS_PARAM );
 629 int float128_is_quiet_nan( float128 );
 630 int float128_is_signaling_nan( float128 );
 631 float128 float128_maybe_silence_nan( float128 );
 632 float128 float128_scalbn( float128, int STATUS_PARAM );
 633
 634 INLINE float128 float128_abs(float128 a)
 635 {
 636     a.high &= 0x7fffffffffffffffLL;
 637     return a;
 638 }
 639
 640 INLINE float128 float128_chs(float128 a)
 641 {
 642     a.high ^= 0x8000000000000000LL;
 643     return a;
 644 }
 645
 646 INLINE int float128_is_infinity(float128 a)
 647 {
 648     return (a.high & 0x7fffffffffffffffLL) == 0x7fff000000000000LL && a.low == 0;
 649 }
 650
 651 INLINE int float128_is_neg(float128 a)
 652 {
 653     return a.high >> 63;
 654 }
 655
 656 INLINE int float128_is_zero(float128 a)
 657 {
 658     return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0;
 659 }
 660
 661 INLINE int float128_is_any_nan(float128 a)
 662 {
 663     return ((a.high >> 48) & 0x7fff) == 0x7fff &&
 664         ((a.low != 0) || ((a.high & 0xffffffffffffLL) != 0));
 665 }
 666
 667 /*----------------------------------------------------------------------------
 668 | The pattern for a default generated quadruple-precision NaN.  The `high' and
 669 | `low' values hold the most- and least-significant bits, respectively.
 670 *----------------------------------------------------------------------------*/
 671 #if SNAN_BIT_IS_ONE
 672 #define float128_default_nan_high LIT64( 0x7FFF7FFFFFFFFFFF )
 673 #define float128_default_nan_low  LIT64( 0xFFFFFFFFFFFFFFFF )
 674 #else
 675 #define float128_default_nan_high LIT64( 0xFFFF800000000000 )
 676 #define float128_default_nan_low  LIT64( 0x0000000000000000 )
 677 #endif
 678
 679 #endif
 680
 681 #else /* CONFIG_SOFTFLOAT */
 682
 683 #include "softfloat-native.h"
 684
 685 #endif /* !CONFIG_SOFTFLOAT */
 686
 687 #endif /* !SOFTFLOAT_H */