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 #define make_floatx80(exp, mant) ((floatx80) { mant, exp })
 158 #endif
 159 #ifdef FLOAT128
 160 typedef struct {
 161 #ifdef HOST_WORDS_BIGENDIAN
 162     uint64_t high, low;
 163 #else
 164     uint64_t low, high;
 165 #endif
 166 } float128;
 167 #endif
 168
 169 /*----------------------------------------------------------------------------
 170 | Software IEC/IEEE floating-point underflow tininess-detection mode.
 171 *----------------------------------------------------------------------------*/
 172 enum {
 173     float_tininess_after_rounding  = 0,
 174     float_tininess_before_rounding = 1
 175 };
 176
 177 /*----------------------------------------------------------------------------
 178 | Software IEC/IEEE floating-point rounding mode.
 179 *----------------------------------------------------------------------------*/
 180 enum {
 181     float_round_nearest_even = 0,
 182     float_round_down         = 1,
 183     float_round_up           = 2,
 184     float_round_to_zero      = 3
 185 };
 186
 187 /*----------------------------------------------------------------------------
 188 | Software IEC/IEEE floating-point exception flags.
 189 *----------------------------------------------------------------------------*/
 190 enum {
 191     float_flag_invalid   =  1,
 192     float_flag_divbyzero =  4,
 193     float_flag_overflow  =  8,
 194     float_flag_underflow = 16,
 195     float_flag_inexact   = 32,
 196     float_flag_input_denormal = 64
 197 };
 198
 199 typedef struct float_status {
 200     signed char float_detect_tininess;
 201     signed char float_rounding_mode;
 202     signed char float_exception_flags;
 203 #ifdef FLOATX80
 204     signed char floatx80_rounding_precision;
 205 #endif
 206     /* should denormalised results go to zero and set the inexact flag? */
 207     flag flush_to_zero;
 208     /* should denormalised inputs go to zero and set the input_denormal flag? */
 209     flag flush_inputs_to_zero;
 210     flag default_nan_mode;
 211 } float_status;
 212
 213 void set_float_rounding_mode(int val STATUS_PARAM);
 214 void set_float_exception_flags(int val STATUS_PARAM);
 215 INLINE void set_float_detect_tininess(int val STATUS_PARAM)
 216 {
 217     STATUS(float_detect_tininess) = val;
 218 }
 219 INLINE void set_flush_to_zero(flag val STATUS_PARAM)
 220 {
 221     STATUS(flush_to_zero) = val;
 222 }
 223 INLINE void set_flush_inputs_to_zero(flag val STATUS_PARAM)
 224 {
 225     STATUS(flush_inputs_to_zero) = val;
 226 }
 227 INLINE void set_default_nan_mode(flag val STATUS_PARAM)
 228 {
 229     STATUS(default_nan_mode) = val;
 230 }
 231 INLINE int get_float_exception_flags(float_status *status)
 232 {
 233     return STATUS(float_exception_flags);
 234 }
 235 #ifdef FLOATX80
 236 void set_floatx80_rounding_precision(int val STATUS_PARAM);
 237 #endif
 238
 239 /*----------------------------------------------------------------------------
 240 | Routine to raise any or all of the software IEC/IEEE floating-point
 241 | exception flags.
 242 *----------------------------------------------------------------------------*/
 243 void float_raise( int8 flags STATUS_PARAM);
 244
 245 /*----------------------------------------------------------------------------
 246 | Software IEC/IEEE integer-to-floating-point conversion routines.
 247 *----------------------------------------------------------------------------*/
 248 float32 int32_to_float32( int32 STATUS_PARAM );
 249 float64 int32_to_float64( int32 STATUS_PARAM );
 250 float32 uint32_to_float32( unsigned int STATUS_PARAM );
 251 float64 uint32_to_float64( unsigned int STATUS_PARAM );
 252 #ifdef FLOATX80
 253 floatx80 int32_to_floatx80( int32 STATUS_PARAM );
 254 #endif
 255 #ifdef FLOAT128
 256 float128 int32_to_float128( int32 STATUS_PARAM );
 257 #endif
 258 float32 int64_to_float32( int64 STATUS_PARAM );
 259 float32 uint64_to_float32( uint64 STATUS_PARAM );
 260 float64 int64_to_float64( int64 STATUS_PARAM );
 261 float64 uint64_to_float64( uint64 STATUS_PARAM );
 262 #ifdef FLOATX80
 263 floatx80 int64_to_floatx80( int64 STATUS_PARAM );
 264 #endif
 265 #ifdef FLOAT128
 266 float128 int64_to_float128( int64 STATUS_PARAM );
 267 #endif
 268
 269 /*----------------------------------------------------------------------------
 270 | Software half-precision conversion routines.
 271 *----------------------------------------------------------------------------*/
 272 float16 float32_to_float16( float32, flag STATUS_PARAM );
 273 float32 float16_to_float32( float16, flag STATUS_PARAM );
 274
 275 /*----------------------------------------------------------------------------
 276 | Software half-precision operations.
 277 *----------------------------------------------------------------------------*/
 278 int float16_is_quiet_nan( float16 );
 279 int float16_is_signaling_nan( float16 );
 280 float16 float16_maybe_silence_nan( float16 );
 281
 282 /*----------------------------------------------------------------------------
 283 | The pattern for a default generated half-precision NaN.
 284 *----------------------------------------------------------------------------*/
 285 #if defined(TARGET_ARM)
 286 #define float16_default_nan make_float16(0x7E00)
 287 #elif SNAN_BIT_IS_ONE
 288 #define float16_default_nan make_float16(0x7DFF)
 289 #else
 290 #define float16_default_nan make_float16(0xFE00)
 291 #endif
 292
 293 /*----------------------------------------------------------------------------
 294 | Software IEC/IEEE single-precision conversion routines.
 295 *----------------------------------------------------------------------------*/
 296 int16 float32_to_int16_round_to_zero( float32 STATUS_PARAM );
 297 unsigned int float32_to_uint16_round_to_zero( float32 STATUS_PARAM );
 298 int32 float32_to_int32( float32 STATUS_PARAM );
 299 int32 float32_to_int32_round_to_zero( float32 STATUS_PARAM );
 300 uint32 float32_to_uint32( float32 STATUS_PARAM );
 301 uint32 float32_to_uint32_round_to_zero( float32 STATUS_PARAM );
 302 int64 float32_to_int64( float32 STATUS_PARAM );
 303 int64 float32_to_int64_round_to_zero( float32 STATUS_PARAM );
 304 float64 float32_to_float64( float32 STATUS_PARAM );
 305 #ifdef FLOATX80
 306 floatx80 float32_to_floatx80( float32 STATUS_PARAM );
 307 #endif
 308 #ifdef FLOAT128
 309 float128 float32_to_float128( float32 STATUS_PARAM );
 310 #endif
 311
 312 /*----------------------------------------------------------------------------
 313 | Software IEC/IEEE single-precision operations.
 314 *----------------------------------------------------------------------------*/
 315 float32 float32_round_to_int( float32 STATUS_PARAM );
 316 float32 float32_add( float32, float32 STATUS_PARAM );
 317 float32 float32_sub( float32, float32 STATUS_PARAM );
 318 float32 float32_mul( float32, float32 STATUS_PARAM );
 319 float32 float32_div( float32, float32 STATUS_PARAM );
 320 float32 float32_rem( float32, float32 STATUS_PARAM );
 321 float32 float32_sqrt( float32 STATUS_PARAM );
 322 float32 float32_exp2( float32 STATUS_PARAM );
 323 float32 float32_log2( float32 STATUS_PARAM );
 324 int float32_eq( float32, float32 STATUS_PARAM );
 325 int float32_le( float32, float32 STATUS_PARAM );
 326 int float32_lt( float32, float32 STATUS_PARAM );
 327 int float32_unordered( float32, float32 STATUS_PARAM );
 328 int float32_eq_quiet( float32, float32 STATUS_PARAM );
 329 int float32_le_quiet( float32, float32 STATUS_PARAM );
 330 int float32_lt_quiet( float32, float32 STATUS_PARAM );
 331 int float32_unordered_quiet( float32, float32 STATUS_PARAM );
 332 int float32_compare( float32, float32 STATUS_PARAM );
 333 int float32_compare_quiet( float32, float32 STATUS_PARAM );
 334 float32 float32_min(float32, float32 STATUS_PARAM);
 335 float32 float32_max(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_pi make_float32(0x40490fdb)
 391 #define float32_half make_float32(0x3f000000)
 392 #define float32_infinity make_float32(0x7f800000)
 393
 394
 395 /*----------------------------------------------------------------------------
 396 | The pattern for a default generated single-precision NaN.
 397 *----------------------------------------------------------------------------*/
 398 #if defined(TARGET_SPARC)
 399 #define float32_default_nan make_float32(0x7FFFFFFF)
 400 #elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
 401 #define float32_default_nan make_float32(0x7FC00000)
 402 #elif SNAN_BIT_IS_ONE
 403 #define float32_default_nan make_float32(0x7FBFFFFF)
 404 #else
 405 #define float32_default_nan make_float32(0xFFC00000)
 406 #endif
 407
 408 /*----------------------------------------------------------------------------
 409 | Software IEC/IEEE double-precision conversion routines.
 410 *----------------------------------------------------------------------------*/
 411 int16 float64_to_int16_round_to_zero( float64 STATUS_PARAM );
 412 unsigned int float64_to_uint16_round_to_zero( float64 STATUS_PARAM );
 413 int32 float64_to_int32( float64 STATUS_PARAM );
 414 int32 float64_to_int32_round_to_zero( float64 STATUS_PARAM );
 415 uint32 float64_to_uint32( float64 STATUS_PARAM );
 416 uint32 float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
 417 int64 float64_to_int64( float64 STATUS_PARAM );
 418 int64 float64_to_int64_round_to_zero( float64 STATUS_PARAM );
 419 uint64 float64_to_uint64 (float64 a STATUS_PARAM);
 420 uint64 float64_to_uint64_round_to_zero (float64 a STATUS_PARAM);
 421 float32 float64_to_float32( float64 STATUS_PARAM );
 422 #ifdef FLOATX80
 423 floatx80 float64_to_floatx80( float64 STATUS_PARAM );
 424 #endif
 425 #ifdef FLOAT128
 426 float128 float64_to_float128( float64 STATUS_PARAM );
 427 #endif
 428
 429 /*----------------------------------------------------------------------------
 430 | Software IEC/IEEE double-precision operations.
 431 *----------------------------------------------------------------------------*/
 432 float64 float64_round_to_int( float64 STATUS_PARAM );
 433 float64 float64_trunc_to_int( float64 STATUS_PARAM );
 434 float64 float64_add( float64, float64 STATUS_PARAM );
 435 float64 float64_sub( float64, float64 STATUS_PARAM );
 436 float64 float64_mul( float64, float64 STATUS_PARAM );
 437 float64 float64_div( float64, float64 STATUS_PARAM );
 438 float64 float64_rem( float64, float64 STATUS_PARAM );
 439 float64 float64_sqrt( float64 STATUS_PARAM );
 440 float64 float64_log2( float64 STATUS_PARAM );
 441 int float64_eq( float64, float64 STATUS_PARAM );
 442 int float64_le( float64, float64 STATUS_PARAM );
 443 int float64_lt( float64, float64 STATUS_PARAM );
 444 int float64_unordered( float64, float64 STATUS_PARAM );
 445 int float64_eq_quiet( float64, float64 STATUS_PARAM );
 446 int float64_le_quiet( float64, float64 STATUS_PARAM );
 447 int float64_lt_quiet( float64, float64 STATUS_PARAM );
 448 int float64_unordered_quiet( float64, float64 STATUS_PARAM );
 449 int float64_compare( float64, float64 STATUS_PARAM );
 450 int float64_compare_quiet( float64, float64 STATUS_PARAM );
 451 float64 float64_min(float64, float64 STATUS_PARAM);
 452 float64 float64_max(float64, float64 STATUS_PARAM);
 453 int float64_is_quiet_nan( float64 a );
 454 int float64_is_signaling_nan( float64 );
 455 float64 float64_maybe_silence_nan( float64 );
 456 float64 float64_scalbn( float64, int STATUS_PARAM );
 457
 458 INLINE float64 float64_abs(float64 a)
 459 {
 460     /* Note that abs does *not* handle NaN specially, nor does
 461      * it flush denormal inputs to zero.
 462      */
 463     return make_float64(float64_val(a) & 0x7fffffffffffffffLL);
 464 }
 465
 466 INLINE float64 float64_chs(float64 a)
 467 {
 468     /* Note that chs does *not* handle NaN specially, nor does
 469      * it flush denormal inputs to zero.
 470      */
 471     return make_float64(float64_val(a) ^ 0x8000000000000000LL);
 472 }
 473
 474 INLINE int float64_is_infinity(float64 a)
 475 {
 476     return (float64_val(a) & 0x7fffffffffffffffLL ) == 0x7ff0000000000000LL;
 477 }
 478
 479 INLINE int float64_is_neg(float64 a)
 480 {
 481     return float64_val(a) >> 63;
 482 }
 483
 484 INLINE int float64_is_zero(float64 a)
 485 {
 486     return (float64_val(a) & 0x7fffffffffffffffLL) == 0;
 487 }
 488
 489 INLINE int float64_is_any_nan(float64 a)
 490 {
 491     return ((float64_val(a) & ~(1ULL << 63)) > 0x7ff0000000000000ULL);
 492 }
 493
 494 INLINE float64 float64_set_sign(float64 a, int sign)
 495 {
 496     return make_float64((float64_val(a) & 0x7fffffffffffffffULL)
 497                         | ((int64_t)sign << 63));
 498 }
 499
 500 #define float64_zero make_float64(0)
 501 #define float64_one make_float64(0x3ff0000000000000LL)
 502 #define float64_ln2 make_float64(0x3fe62e42fefa39efLL)
 503 #define float64_pi make_float64(0x400921fb54442d18LL)
 504 #define float64_half make_float64(0x3fe0000000000000LL)
 505 #define float64_infinity make_float64(0x7ff0000000000000LL)
 506
 507 /*----------------------------------------------------------------------------
 508 | The pattern for a default generated double-precision NaN.
 509 *----------------------------------------------------------------------------*/
 510 #if defined(TARGET_SPARC)
 511 #define float64_default_nan make_float64(LIT64( 0x7FFFFFFFFFFFFFFF ))
 512 #elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
 513 #define float64_default_nan make_float64(LIT64( 0x7FF8000000000000 ))
 514 #elif SNAN_BIT_IS_ONE
 515 #define float64_default_nan make_float64(LIT64( 0x7FF7FFFFFFFFFFFF ))
 516 #else
 517 #define float64_default_nan make_float64(LIT64( 0xFFF8000000000000 ))
 518 #endif
 519
 520 #ifdef FLOATX80
 521
 522 /*----------------------------------------------------------------------------
 523 | Software IEC/IEEE extended double-precision conversion routines.
 524 *----------------------------------------------------------------------------*/
 525 int32 floatx80_to_int32( floatx80 STATUS_PARAM );
 526 int32 floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
 527 int64 floatx80_to_int64( floatx80 STATUS_PARAM );
 528 int64 floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM );
 529 float32 floatx80_to_float32( floatx80 STATUS_PARAM );
 530 float64 floatx80_to_float64( floatx80 STATUS_PARAM );
 531 #ifdef FLOAT128
 532 float128 floatx80_to_float128( floatx80 STATUS_PARAM );
 533 #endif
 534
 535 /*----------------------------------------------------------------------------
 536 | Software IEC/IEEE extended double-precision operations.
 537 *----------------------------------------------------------------------------*/
 538 floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
 539 floatx80 floatx80_add( floatx80, floatx80 STATUS_PARAM );
 540 floatx80 floatx80_sub( floatx80, floatx80 STATUS_PARAM );
 541 floatx80 floatx80_mul( floatx80, floatx80 STATUS_PARAM );
 542 floatx80 floatx80_div( floatx80, floatx80 STATUS_PARAM );
 543 floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
 544 floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
 545 int floatx80_eq( floatx80, floatx80 STATUS_PARAM );
 546 int floatx80_le( floatx80, floatx80 STATUS_PARAM );
 547 int floatx80_lt( floatx80, floatx80 STATUS_PARAM );
 548 int floatx80_unordered( floatx80, floatx80 STATUS_PARAM );
 549 int floatx80_eq_quiet( floatx80, floatx80 STATUS_PARAM );
 550 int floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM );
 551 int floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM );
 552 int floatx80_unordered_quiet( floatx80, floatx80 STATUS_PARAM );
 553 int floatx80_compare( floatx80, floatx80 STATUS_PARAM );
 554 int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
 555 int floatx80_is_quiet_nan( floatx80 );
 556 int floatx80_is_signaling_nan( floatx80 );
 557 floatx80 floatx80_maybe_silence_nan( floatx80 );
 558 floatx80 floatx80_scalbn( floatx80, int STATUS_PARAM );
 559
 560 INLINE floatx80 floatx80_abs(floatx80 a)
 561 {
 562     a.high &= 0x7fff;
 563     return a;
 564 }
 565
 566 INLINE floatx80 floatx80_chs(floatx80 a)
 567 {
 568     a.high ^= 0x8000;
 569     return a;
 570 }
 571
 572 INLINE int floatx80_is_infinity(floatx80 a)
 573 {
 574     return (a.high & 0x7fff) == 0x7fff && a.low == 0x8000000000000000LL;
 575 }
 576
 577 INLINE int floatx80_is_neg(floatx80 a)
 578 {
 579     return a.high >> 15;
 580 }
 581
 582 INLINE int floatx80_is_zero(floatx80 a)
 583 {
 584     return (a.high & 0x7fff) == 0 && a.low == 0;
 585 }
 586
 587 INLINE int floatx80_is_any_nan(floatx80 a)
 588 {
 589     return ((a.high & 0x7fff) == 0x7fff) && (a.low<<1);
 590 }
 591
 592 #define floatx80_zero make_floatx80(0x0000, 0x0000000000000000LL)
 593 #define floatx80_one make_floatx80(0x3fff, 0x8000000000000000LL)
 594 #define floatx80_ln2 make_floatx80(0x3ffe, 0xb17217f7d1cf79acLL)
 595 #define floatx80_pi make_floatx80(0x4000, 0xc90fdaa22168c235LL)
 596 #define floatx80_half make_floatx80(0x3ffe, 0x8000000000000000LL)
 597 #define floatx80_infinity make_floatx80(0x7fff, 0x8000000000000000LL)
 598
 599 /*----------------------------------------------------------------------------
 600 | The pattern for a default generated extended double-precision NaN.  The
 601 | `high' and `low' values hold the most- and least-significant bits,
 602 | respectively.
 603 *----------------------------------------------------------------------------*/
 604 #if SNAN_BIT_IS_ONE
 605 #define floatx80_default_nan_high 0x7FFF
 606 #define floatx80_default_nan_low  LIT64( 0xBFFFFFFFFFFFFFFF )
 607 #else
 608 #define floatx80_default_nan_high 0xFFFF
 609 #define floatx80_default_nan_low  LIT64( 0xC000000000000000 )
 610 #endif
 611
 612 #endif
 613
 614 #ifdef FLOAT128
 615
 616 /*----------------------------------------------------------------------------
 617 | Software IEC/IEEE quadruple-precision conversion routines.
 618 *----------------------------------------------------------------------------*/
 619 int32 float128_to_int32( float128 STATUS_PARAM );
 620 int32 float128_to_int32_round_to_zero( float128 STATUS_PARAM );
 621 int64 float128_to_int64( float128 STATUS_PARAM );
 622 int64 float128_to_int64_round_to_zero( float128 STATUS_PARAM );
 623 float32 float128_to_float32( float128 STATUS_PARAM );
 624 float64 float128_to_float64( float128 STATUS_PARAM );
 625 #ifdef FLOATX80
 626 floatx80 float128_to_floatx80( float128 STATUS_PARAM );
 627 #endif
 628
 629 /*----------------------------------------------------------------------------
 630 | Software IEC/IEEE quadruple-precision operations.
 631 *----------------------------------------------------------------------------*/
 632 float128 float128_round_to_int( float128 STATUS_PARAM );
 633 float128 float128_add( float128, float128 STATUS_PARAM );
 634 float128 float128_sub( float128, float128 STATUS_PARAM );
 635 float128 float128_mul( float128, float128 STATUS_PARAM );
 636 float128 float128_div( float128, float128 STATUS_PARAM );
 637 float128 float128_rem( float128, float128 STATUS_PARAM );
 638 float128 float128_sqrt( float128 STATUS_PARAM );
 639 int float128_eq( float128, float128 STATUS_PARAM );
 640 int float128_le( float128, float128 STATUS_PARAM );
 641 int float128_lt( float128, float128 STATUS_PARAM );
 642 int float128_unordered( float128, float128 STATUS_PARAM );
 643 int float128_eq_quiet( float128, float128 STATUS_PARAM );
 644 int float128_le_quiet( float128, float128 STATUS_PARAM );
 645 int float128_lt_quiet( float128, float128 STATUS_PARAM );
 646 int float128_unordered_quiet( float128, float128 STATUS_PARAM );
 647 int float128_compare( float128, float128 STATUS_PARAM );
 648 int float128_compare_quiet( float128, float128 STATUS_PARAM );
 649 int float128_is_quiet_nan( float128 );
 650 int float128_is_signaling_nan( float128 );
 651 float128 float128_maybe_silence_nan( float128 );
 652 float128 float128_scalbn( float128, int STATUS_PARAM );
 653
 654 INLINE float128 float128_abs(float128 a)
 655 {
 656     a.high &= 0x7fffffffffffffffLL;
 657     return a;
 658 }
 659
 660 INLINE float128 float128_chs(float128 a)
 661 {
 662     a.high ^= 0x8000000000000000LL;
 663     return a;
 664 }
 665
 666 INLINE int float128_is_infinity(float128 a)
 667 {
 668     return (a.high & 0x7fffffffffffffffLL) == 0x7fff000000000000LL && a.low == 0;
 669 }
 670
 671 INLINE int float128_is_neg(float128 a)
 672 {
 673     return a.high >> 63;
 674 }
 675
 676 INLINE int float128_is_zero(float128 a)
 677 {
 678     return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0;
 679 }
 680
 681 INLINE int float128_is_any_nan(float128 a)
 682 {
 683     return ((a.high >> 48) & 0x7fff) == 0x7fff &&
 684         ((a.low != 0) || ((a.high & 0xffffffffffffLL) != 0));
 685 }
 686
 687 /*----------------------------------------------------------------------------
 688 | The pattern for a default generated quadruple-precision NaN.  The `high' and
 689 | `low' values hold the most- and least-significant bits, respectively.
 690 *----------------------------------------------------------------------------*/
 691 #if SNAN_BIT_IS_ONE
 692 #define float128_default_nan_high LIT64( 0x7FFF7FFFFFFFFFFF )
 693 #define float128_default_nan_low  LIT64( 0xFFFFFFFFFFFFFFFF )
 694 #else
 695 #define float128_default_nan_high LIT64( 0xFFFF800000000000 )
 696 #define float128_default_nan_low  LIT64( 0x0000000000000000 )
 697 #endif
 698
 699 #endif
 700
 701 #else /* CONFIG_SOFTFLOAT */
 702
 703 #include "softfloat-native.h"
 704
 705 #endif /* !CONFIG_SOFTFLOAT */
 706
 707 #endif /* !SOFTFLOAT_H */