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 #define STATUS_PARAM , float_status *status
  78 #define STATUS(field) status->field
  79 #define STATUS_VAR , status
  80
  81 /*----------------------------------------------------------------------------
  82 | Software IEC/IEEE floating-point ordering relations
  83 *----------------------------------------------------------------------------*/
  84 enum {
  85     float_relation_less      = -1,
  86     float_relation_equal     =  0,
  87     float_relation_greater   =  1,
  88     float_relation_unordered =  2
  89 };
  90
  91 /*----------------------------------------------------------------------------
  92 | Software IEC/IEEE floating-point types.
  93 *----------------------------------------------------------------------------*/
  94 /* Use structures for soft-float types.  This prevents accidentally mixing
  95    them with native int/float types.  A sufficiently clever compiler and
  96    sane ABI should be able to see though these structs.  However
  97    x86/gcc 3.x seems to struggle a bit, so leave them disabled by default.  */
  98 //#define USE_SOFTFLOAT_STRUCT_TYPES
  99 #ifdef USE_SOFTFLOAT_STRUCT_TYPES
 100 typedef struct {
 101     uint16_t v;
 102 } float16;
 103 #define float16_val(x) (((float16)(x)).v)
 104 #define make_float16(x) __extension__ ({ float16 f16_val = {x}; f16_val; })
 105 #define const_float16(x) { x }
 106 typedef struct {
 107     uint32_t v;
 108 } float32;
 109 /* The cast ensures an error if the wrong type is passed.  */
 110 #define float32_val(x) (((float32)(x)).v)
 111 #define make_float32(x) __extension__ ({ float32 f32_val = {x}; f32_val; })
 112 #define const_float32(x) { x }
 113 typedef struct {
 114     uint64_t v;
 115 } float64;
 116 #define float64_val(x) (((float64)(x)).v)
 117 #define make_float64(x) __extension__ ({ float64 f64_val = {x}; f64_val; })
 118 #define const_float64(x) { x }
 119 #else
 120 typedef uint16_t float16;
 121 typedef uint32_t float32;
 122 typedef uint64_t float64;
 123 #define float16_val(x) (x)
 124 #define float32_val(x) (x)
 125 #define float64_val(x) (x)
 126 #define make_float16(x) (x)
 127 #define make_float32(x) (x)
 128 #define make_float64(x) (x)
 129 #define const_float16(x) (x)
 130 #define const_float32(x) (x)
 131 #define const_float64(x) (x)
 132 #endif
 133 typedef struct {
 134     uint64_t low;
 135     uint16_t high;
 136 } floatx80;
 137 #define make_floatx80(exp, mant) ((floatx80) { mant, exp })
 138 typedef struct {
 139 #ifdef HOST_WORDS_BIGENDIAN
 140     uint64_t high, low;
 141 #else
 142     uint64_t low, high;
 143 #endif
 144 } float128;
 145
 146 /*----------------------------------------------------------------------------
 147 | Software IEC/IEEE floating-point underflow tininess-detection mode.
 148 *----------------------------------------------------------------------------*/
 149 enum {
 150     float_tininess_after_rounding  = 0,
 151     float_tininess_before_rounding = 1
 152 };
 153
 154 /*----------------------------------------------------------------------------
 155 | Software IEC/IEEE floating-point rounding mode.
 156 *----------------------------------------------------------------------------*/
 157 enum {
 158     float_round_nearest_even = 0,
 159     float_round_down         = 1,
 160     float_round_up           = 2,
 161     float_round_to_zero      = 3
 162 };
 163
 164 /*----------------------------------------------------------------------------
 165 | Software IEC/IEEE floating-point exception flags.
 166 *----------------------------------------------------------------------------*/
 167 enum {
 168     float_flag_invalid   =  1,
 169     float_flag_divbyzero =  4,
 170     float_flag_overflow  =  8,
 171     float_flag_underflow = 16,
 172     float_flag_inexact   = 32,
 173     float_flag_input_denormal = 64,
 174     float_flag_output_denormal = 128
 175 };
 176
 177 typedef struct float_status {
 178     signed char float_detect_tininess;
 179     signed char float_rounding_mode;
 180     signed char float_exception_flags;
 181     signed char floatx80_rounding_precision;
 182     /* should denormalised results go to zero and set the inexact flag? */
 183     flag flush_to_zero;
 184     /* should denormalised inputs go to zero and set the input_denormal flag? */
 185     flag flush_inputs_to_zero;
 186     flag default_nan_mode;
 187 } float_status;
 188
 189 void set_float_rounding_mode(int val STATUS_PARAM);
 190 void set_float_exception_flags(int val STATUS_PARAM);
 191 INLINE void set_float_detect_tininess(int val STATUS_PARAM)
 192 {
 193     STATUS(float_detect_tininess) = val;
 194 }
 195 INLINE void set_flush_to_zero(flag val STATUS_PARAM)
 196 {
 197     STATUS(flush_to_zero) = val;
 198 }
 199 INLINE void set_flush_inputs_to_zero(flag val STATUS_PARAM)
 200 {
 201     STATUS(flush_inputs_to_zero) = val;
 202 }
 203 INLINE void set_default_nan_mode(flag val STATUS_PARAM)
 204 {
 205     STATUS(default_nan_mode) = val;
 206 }
 207 INLINE int get_float_exception_flags(float_status *status)
 208 {
 209     return STATUS(float_exception_flags);
 210 }
 211 void set_floatx80_rounding_precision(int val STATUS_PARAM);
 212
 213 /*----------------------------------------------------------------------------
 214 | Routine to raise any or all of the software IEC/IEEE floating-point
 215 | exception flags.
 216 *----------------------------------------------------------------------------*/
 217 void float_raise( int8 flags STATUS_PARAM);
 218
 219 /*----------------------------------------------------------------------------
 220 | Software IEC/IEEE integer-to-floating-point conversion routines.
 221 *----------------------------------------------------------------------------*/
 222 float32 int32_to_float32( int32 STATUS_PARAM );
 223 float64 int32_to_float64( int32 STATUS_PARAM );
 224 float32 uint32_to_float32( unsigned int STATUS_PARAM );
 225 float64 uint32_to_float64( unsigned int STATUS_PARAM );
 226 floatx80 int32_to_floatx80( int32 STATUS_PARAM );
 227 float128 int32_to_float128( int32 STATUS_PARAM );
 228 float32 int64_to_float32( int64 STATUS_PARAM );
 229 float32 uint64_to_float32( uint64 STATUS_PARAM );
 230 float64 int64_to_float64( int64 STATUS_PARAM );
 231 float64 uint64_to_float64( uint64 STATUS_PARAM );
 232 floatx80 int64_to_floatx80( int64 STATUS_PARAM );
 233 float128 int64_to_float128( int64 STATUS_PARAM );
 234
 235 /*----------------------------------------------------------------------------
 236 | Software half-precision conversion routines.
 237 *----------------------------------------------------------------------------*/
 238 float16 float32_to_float16( float32, flag STATUS_PARAM );
 239 float32 float16_to_float32( float16, flag STATUS_PARAM );
 240
 241 /*----------------------------------------------------------------------------
 242 | Software half-precision operations.
 243 *----------------------------------------------------------------------------*/
 244 int float16_is_quiet_nan( float16 );
 245 int float16_is_signaling_nan( float16 );
 246 float16 float16_maybe_silence_nan( float16 );
 247
 248 /*----------------------------------------------------------------------------
 249 | The pattern for a default generated half-precision NaN.
 250 *----------------------------------------------------------------------------*/
 251 #if defined(TARGET_ARM)
 252 #define float16_default_nan make_float16(0x7E00)
 253 #elif SNAN_BIT_IS_ONE
 254 #define float16_default_nan make_float16(0x7DFF)
 255 #else
 256 #define float16_default_nan make_float16(0xFE00)
 257 #endif
 258
 259 /*----------------------------------------------------------------------------
 260 | Software IEC/IEEE single-precision conversion routines.
 261 *----------------------------------------------------------------------------*/
 262 int16 float32_to_int16_round_to_zero( float32 STATUS_PARAM );
 263 unsigned int float32_to_uint16_round_to_zero( float32 STATUS_PARAM );
 264 int32 float32_to_int32( float32 STATUS_PARAM );
 265 int32 float32_to_int32_round_to_zero( float32 STATUS_PARAM );
 266 uint32 float32_to_uint32( float32 STATUS_PARAM );
 267 uint32 float32_to_uint32_round_to_zero( float32 STATUS_PARAM );
 268 int64 float32_to_int64( float32 STATUS_PARAM );
 269 int64 float32_to_int64_round_to_zero( float32 STATUS_PARAM );
 270 float64 float32_to_float64( float32 STATUS_PARAM );
 271 floatx80 float32_to_floatx80( float32 STATUS_PARAM );
 272 float128 float32_to_float128( float32 STATUS_PARAM );
 273
 274 /*----------------------------------------------------------------------------
 275 | Software IEC/IEEE single-precision operations.
 276 *----------------------------------------------------------------------------*/
 277 float32 float32_round_to_int( float32 STATUS_PARAM );
 278 float32 float32_add( float32, float32 STATUS_PARAM );
 279 float32 float32_sub( float32, float32 STATUS_PARAM );
 280 float32 float32_mul( float32, float32 STATUS_PARAM );
 281 float32 float32_div( float32, float32 STATUS_PARAM );
 282 float32 float32_rem( float32, float32 STATUS_PARAM );
 283 float32 float32_sqrt( float32 STATUS_PARAM );
 284 float32 float32_exp2( float32 STATUS_PARAM );
 285 float32 float32_log2( float32 STATUS_PARAM );
 286 int float32_eq( float32, float32 STATUS_PARAM );
 287 int float32_le( float32, float32 STATUS_PARAM );
 288 int float32_lt( float32, float32 STATUS_PARAM );
 289 int float32_unordered( float32, float32 STATUS_PARAM );
 290 int float32_eq_quiet( float32, float32 STATUS_PARAM );
 291 int float32_le_quiet( float32, float32 STATUS_PARAM );
 292 int float32_lt_quiet( float32, float32 STATUS_PARAM );
 293 int float32_unordered_quiet( float32, float32 STATUS_PARAM );
 294 int float32_compare( float32, float32 STATUS_PARAM );
 295 int float32_compare_quiet( float32, float32 STATUS_PARAM );
 296 float32 float32_min(float32, float32 STATUS_PARAM);
 297 float32 float32_max(float32, float32 STATUS_PARAM);
 298 int float32_is_quiet_nan( float32 );
 299 int float32_is_signaling_nan( float32 );
 300 float32 float32_maybe_silence_nan( float32 );
 301 float32 float32_scalbn( float32, int STATUS_PARAM );
 302
 303 INLINE float32 float32_abs(float32 a)
 304 {
 305     /* Note that abs does *not* handle NaN specially, nor does
 306      * it flush denormal inputs to zero.
 307      */
 308     return make_float32(float32_val(a) & 0x7fffffff);
 309 }
 310
 311 INLINE float32 float32_chs(float32 a)
 312 {
 313     /* Note that chs does *not* handle NaN specially, nor does
 314      * it flush denormal inputs to zero.
 315      */
 316     return make_float32(float32_val(a) ^ 0x80000000);
 317 }
 318
 319 INLINE int float32_is_infinity(float32 a)
 320 {
 321     return (float32_val(a) & 0x7fffffff) == 0x7f800000;
 322 }
 323
 324 INLINE int float32_is_neg(float32 a)
 325 {
 326     return float32_val(a) >> 31;
 327 }
 328
 329 INLINE int float32_is_zero(float32 a)
 330 {
 331     return (float32_val(a) & 0x7fffffff) == 0;
 332 }
 333
 334 INLINE int float32_is_any_nan(float32 a)
 335 {
 336     return ((float32_val(a) & ~(1 << 31)) > 0x7f800000UL);
 337 }
 338
 339 INLINE int float32_is_zero_or_denormal(float32 a)
 340 {
 341     return (float32_val(a) & 0x7f800000) == 0;
 342 }
 343
 344 INLINE float32 float32_set_sign(float32 a, int sign)
 345 {
 346     return make_float32((float32_val(a) & 0x7fffffff) | (sign << 31));
 347 }
 348
 349 #define float32_zero make_float32(0)
 350 #define float32_one make_float32(0x3f800000)
 351 #define float32_ln2 make_float32(0x3f317218)
 352 #define float32_pi make_float32(0x40490fdb)
 353 #define float32_half make_float32(0x3f000000)
 354 #define float32_infinity make_float32(0x7f800000)
 355
 356
 357 /*----------------------------------------------------------------------------
 358 | The pattern for a default generated single-precision NaN.
 359 *----------------------------------------------------------------------------*/
 360 #if defined(TARGET_SPARC)
 361 #define float32_default_nan make_float32(0x7FFFFFFF)
 362 #elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
 363 #define float32_default_nan make_float32(0x7FC00000)
 364 #elif SNAN_BIT_IS_ONE
 365 #define float32_default_nan make_float32(0x7FBFFFFF)
 366 #else
 367 #define float32_default_nan make_float32(0xFFC00000)
 368 #endif
 369
 370 /*----------------------------------------------------------------------------
 371 | Software IEC/IEEE double-precision conversion routines.
 372 *----------------------------------------------------------------------------*/
 373 int16 float64_to_int16_round_to_zero( float64 STATUS_PARAM );
 374 unsigned int float64_to_uint16_round_to_zero( float64 STATUS_PARAM );
 375 int32 float64_to_int32( float64 STATUS_PARAM );
 376 int32 float64_to_int32_round_to_zero( float64 STATUS_PARAM );
 377 uint32 float64_to_uint32( float64 STATUS_PARAM );
 378 uint32 float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
 379 int64 float64_to_int64( float64 STATUS_PARAM );
 380 int64 float64_to_int64_round_to_zero( float64 STATUS_PARAM );
 381 uint64 float64_to_uint64 (float64 a STATUS_PARAM);
 382 uint64 float64_to_uint64_round_to_zero (float64 a STATUS_PARAM);
 383 float32 float64_to_float32( float64 STATUS_PARAM );
 384 floatx80 float64_to_floatx80( float64 STATUS_PARAM );
 385 float128 float64_to_float128( float64 STATUS_PARAM );
 386
 387 /*----------------------------------------------------------------------------
 388 | Software IEC/IEEE double-precision operations.
 389 *----------------------------------------------------------------------------*/
 390 float64 float64_round_to_int( float64 STATUS_PARAM );
 391 float64 float64_trunc_to_int( float64 STATUS_PARAM );
 392 float64 float64_add( float64, float64 STATUS_PARAM );
 393 float64 float64_sub( float64, float64 STATUS_PARAM );
 394 float64 float64_mul( float64, float64 STATUS_PARAM );
 395 float64 float64_div( float64, float64 STATUS_PARAM );
 396 float64 float64_rem( float64, float64 STATUS_PARAM );
 397 float64 float64_sqrt( float64 STATUS_PARAM );
 398 float64 float64_log2( float64 STATUS_PARAM );
 399 int float64_eq( float64, float64 STATUS_PARAM );
 400 int float64_le( float64, float64 STATUS_PARAM );
 401 int float64_lt( float64, float64 STATUS_PARAM );
 402 int float64_unordered( float64, float64 STATUS_PARAM );
 403 int float64_eq_quiet( float64, float64 STATUS_PARAM );
 404 int float64_le_quiet( float64, float64 STATUS_PARAM );
 405 int float64_lt_quiet( float64, float64 STATUS_PARAM );
 406 int float64_unordered_quiet( float64, float64 STATUS_PARAM );
 407 int float64_compare( float64, float64 STATUS_PARAM );
 408 int float64_compare_quiet( float64, float64 STATUS_PARAM );
 409 float64 float64_min(float64, float64 STATUS_PARAM);
 410 float64 float64_max(float64, float64 STATUS_PARAM);
 411 int float64_is_quiet_nan( float64 a );
 412 int float64_is_signaling_nan( float64 );
 413 float64 float64_maybe_silence_nan( float64 );
 414 float64 float64_scalbn( float64, int STATUS_PARAM );
 415
 416 INLINE float64 float64_abs(float64 a)
 417 {
 418     /* Note that abs does *not* handle NaN specially, nor does
 419      * it flush denormal inputs to zero.
 420      */
 421     return make_float64(float64_val(a) & 0x7fffffffffffffffLL);
 422 }
 423
 424 INLINE float64 float64_chs(float64 a)
 425 {
 426     /* Note that chs does *not* handle NaN specially, nor does
 427      * it flush denormal inputs to zero.
 428      */
 429     return make_float64(float64_val(a) ^ 0x8000000000000000LL);
 430 }
 431
 432 INLINE int float64_is_infinity(float64 a)
 433 {
 434     return (float64_val(a) & 0x7fffffffffffffffLL ) == 0x7ff0000000000000LL;
 435 }
 436
 437 INLINE int float64_is_neg(float64 a)
 438 {
 439     return float64_val(a) >> 63;
 440 }
 441
 442 INLINE int float64_is_zero(float64 a)
 443 {
 444     return (float64_val(a) & 0x7fffffffffffffffLL) == 0;
 445 }
 446
 447 INLINE int float64_is_any_nan(float64 a)
 448 {
 449     return ((float64_val(a) & ~(1ULL << 63)) > 0x7ff0000000000000ULL);
 450 }
 451
 452 INLINE int float64_is_zero_or_denormal(float64 a)
 453 {
 454     return (float64_val(a) & 0x7ff0000000000000LL) == 0;
 455 }
 456
 457 INLINE float64 float64_set_sign(float64 a, int sign)
 458 {
 459     return make_float64((float64_val(a) & 0x7fffffffffffffffULL)
 460                         | ((int64_t)sign << 63));
 461 }
 462
 463 #define float64_zero make_float64(0)
 464 #define float64_one make_float64(0x3ff0000000000000LL)
 465 #define float64_ln2 make_float64(0x3fe62e42fefa39efLL)
 466 #define float64_pi make_float64(0x400921fb54442d18LL)
 467 #define float64_half make_float64(0x3fe0000000000000LL)
 468 #define float64_infinity make_float64(0x7ff0000000000000LL)
 469
 470 /*----------------------------------------------------------------------------
 471 | The pattern for a default generated double-precision NaN.
 472 *----------------------------------------------------------------------------*/
 473 #if defined(TARGET_SPARC)
 474 #define float64_default_nan make_float64(LIT64( 0x7FFFFFFFFFFFFFFF ))
 475 #elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
 476 #define float64_default_nan make_float64(LIT64( 0x7FF8000000000000 ))
 477 #elif SNAN_BIT_IS_ONE
 478 #define float64_default_nan make_float64(LIT64( 0x7FF7FFFFFFFFFFFF ))
 479 #else
 480 #define float64_default_nan make_float64(LIT64( 0xFFF8000000000000 ))
 481 #endif
 482
 483 /*----------------------------------------------------------------------------
 484 | Software IEC/IEEE extended double-precision conversion routines.
 485 *----------------------------------------------------------------------------*/
 486 int32 floatx80_to_int32( floatx80 STATUS_PARAM );
 487 int32 floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
 488 int64 floatx80_to_int64( floatx80 STATUS_PARAM );
 489 int64 floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM );
 490 float32 floatx80_to_float32( floatx80 STATUS_PARAM );
 491 float64 floatx80_to_float64( floatx80 STATUS_PARAM );
 492 float128 floatx80_to_float128( floatx80 STATUS_PARAM );
 493
 494 /*----------------------------------------------------------------------------
 495 | Software IEC/IEEE extended double-precision operations.
 496 *----------------------------------------------------------------------------*/
 497 floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
 498 floatx80 floatx80_add( floatx80, floatx80 STATUS_PARAM );
 499 floatx80 floatx80_sub( floatx80, floatx80 STATUS_PARAM );
 500 floatx80 floatx80_mul( floatx80, floatx80 STATUS_PARAM );
 501 floatx80 floatx80_div( floatx80, floatx80 STATUS_PARAM );
 502 floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
 503 floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
 504 int floatx80_eq( floatx80, floatx80 STATUS_PARAM );
 505 int floatx80_le( floatx80, floatx80 STATUS_PARAM );
 506 int floatx80_lt( floatx80, floatx80 STATUS_PARAM );
 507 int floatx80_unordered( floatx80, floatx80 STATUS_PARAM );
 508 int floatx80_eq_quiet( floatx80, floatx80 STATUS_PARAM );
 509 int floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM );
 510 int floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM );
 511 int floatx80_unordered_quiet( floatx80, floatx80 STATUS_PARAM );
 512 int floatx80_compare( floatx80, floatx80 STATUS_PARAM );
 513 int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
 514 int floatx80_is_quiet_nan( floatx80 );
 515 int floatx80_is_signaling_nan( floatx80 );
 516 floatx80 floatx80_maybe_silence_nan( floatx80 );
 517 floatx80 floatx80_scalbn( floatx80, int STATUS_PARAM );
 518
 519 INLINE floatx80 floatx80_abs(floatx80 a)
 520 {
 521     a.high &= 0x7fff;
 522     return a;
 523 }
 524
 525 INLINE floatx80 floatx80_chs(floatx80 a)
 526 {
 527     a.high ^= 0x8000;
 528     return a;
 529 }
 530
 531 INLINE int floatx80_is_infinity(floatx80 a)
 532 {
 533     return (a.high & 0x7fff) == 0x7fff && a.low == 0x8000000000000000LL;
 534 }
 535
 536 INLINE int floatx80_is_neg(floatx80 a)
 537 {
 538     return a.high >> 15;
 539 }
 540
 541 INLINE int floatx80_is_zero(floatx80 a)
 542 {
 543     return (a.high & 0x7fff) == 0 && a.low == 0;
 544 }
 545
 546 INLINE int floatx80_is_zero_or_denormal(floatx80 a)
 547 {
 548     return (a.high & 0x7fff) == 0;
 549 }
 550
 551 INLINE int floatx80_is_any_nan(floatx80 a)
 552 {
 553     return ((a.high & 0x7fff) == 0x7fff) && (a.low<<1);
 554 }
 555
 556 #define floatx80_zero make_floatx80(0x0000, 0x0000000000000000LL)
 557 #define floatx80_one make_floatx80(0x3fff, 0x8000000000000000LL)
 558 #define floatx80_ln2 make_floatx80(0x3ffe, 0xb17217f7d1cf79acLL)
 559 #define floatx80_pi make_floatx80(0x4000, 0xc90fdaa22168c235LL)
 560 #define floatx80_half make_floatx80(0x3ffe, 0x8000000000000000LL)
 561 #define floatx80_infinity make_floatx80(0x7fff, 0x8000000000000000LL)
 562
 563 /*----------------------------------------------------------------------------
 564 | The pattern for a default generated extended double-precision NaN.  The
 565 | `high' and `low' values hold the most- and least-significant bits,
 566 | respectively.
 567 *----------------------------------------------------------------------------*/
 568 #if SNAN_BIT_IS_ONE
 569 #define floatx80_default_nan_high 0x7FFF
 570 #define floatx80_default_nan_low  LIT64( 0xBFFFFFFFFFFFFFFF )
 571 #else
 572 #define floatx80_default_nan_high 0xFFFF
 573 #define floatx80_default_nan_low  LIT64( 0xC000000000000000 )
 574 #endif
 575
 576 /*----------------------------------------------------------------------------
 577 | Software IEC/IEEE quadruple-precision conversion routines.
 578 *----------------------------------------------------------------------------*/
 579 int32 float128_to_int32( float128 STATUS_PARAM );
 580 int32 float128_to_int32_round_to_zero( float128 STATUS_PARAM );
 581 int64 float128_to_int64( float128 STATUS_PARAM );
 582 int64 float128_to_int64_round_to_zero( float128 STATUS_PARAM );
 583 float32 float128_to_float32( float128 STATUS_PARAM );
 584 float64 float128_to_float64( float128 STATUS_PARAM );
 585 floatx80 float128_to_floatx80( float128 STATUS_PARAM );
 586
 587 /*----------------------------------------------------------------------------
 588 | Software IEC/IEEE quadruple-precision operations.
 589 *----------------------------------------------------------------------------*/
 590 float128 float128_round_to_int( float128 STATUS_PARAM );
 591 float128 float128_add( float128, float128 STATUS_PARAM );
 592 float128 float128_sub( float128, float128 STATUS_PARAM );
 593 float128 float128_mul( float128, float128 STATUS_PARAM );
 594 float128 float128_div( float128, float128 STATUS_PARAM );
 595 float128 float128_rem( float128, float128 STATUS_PARAM );
 596 float128 float128_sqrt( float128 STATUS_PARAM );
 597 int float128_eq( float128, float128 STATUS_PARAM );
 598 int float128_le( float128, float128 STATUS_PARAM );
 599 int float128_lt( float128, float128 STATUS_PARAM );
 600 int float128_unordered( float128, float128 STATUS_PARAM );
 601 int float128_eq_quiet( float128, float128 STATUS_PARAM );
 602 int float128_le_quiet( float128, float128 STATUS_PARAM );
 603 int float128_lt_quiet( float128, float128 STATUS_PARAM );
 604 int float128_unordered_quiet( float128, float128 STATUS_PARAM );
 605 int float128_compare( float128, float128 STATUS_PARAM );
 606 int float128_compare_quiet( float128, float128 STATUS_PARAM );
 607 int float128_is_quiet_nan( float128 );
 608 int float128_is_signaling_nan( float128 );
 609 float128 float128_maybe_silence_nan( float128 );
 610 float128 float128_scalbn( float128, int STATUS_PARAM );
 611
 612 INLINE float128 float128_abs(float128 a)
 613 {
 614     a.high &= 0x7fffffffffffffffLL;
 615     return a;
 616 }
 617
 618 INLINE float128 float128_chs(float128 a)
 619 {
 620     a.high ^= 0x8000000000000000LL;
 621     return a;
 622 }
 623
 624 INLINE int float128_is_infinity(float128 a)
 625 {
 626     return (a.high & 0x7fffffffffffffffLL) == 0x7fff000000000000LL && a.low == 0;
 627 }
 628
 629 INLINE int float128_is_neg(float128 a)
 630 {
 631     return a.high >> 63;
 632 }
 633
 634 INLINE int float128_is_zero(float128 a)
 635 {
 636     return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0;
 637 }
 638
 639 INLINE int float128_is_zero_or_denormal(float128 a)
 640 {
 641     return (a.high & 0x7fff000000000000LL) == 0;
 642 }
 643
 644 INLINE int float128_is_any_nan(float128 a)
 645 {
 646     return ((a.high >> 48) & 0x7fff) == 0x7fff &&
 647         ((a.low != 0) || ((a.high & 0xffffffffffffLL) != 0));
 648 }
 649
 650 /*----------------------------------------------------------------------------
 651 | The pattern for a default generated quadruple-precision NaN.  The `high' and
 652 | `low' values hold the most- and least-significant bits, respectively.
 653 *----------------------------------------------------------------------------*/
 654 #if SNAN_BIT_IS_ONE
 655 #define float128_default_nan_high LIT64( 0x7FFF7FFFFFFFFFFF )
 656 #define float128_default_nan_low  LIT64( 0xFFFFFFFFFFFFFFFF )
 657 #else
 658 #define float128_default_nan_high LIT64( 0xFFFF800000000000 )
 659 #define float128_default_nan_low  LIT64( 0x0000000000000000 )
 660 #endif
 661
 662 #endif /* !SOFTFLOAT_H */