fpu/softfloat-native.h

   1 /* Native implementation of soft float functions */
   2 #include <math.h>
   3
   4 #if (defined(HOST_BSD) && !defined(__APPLE__)) || defined(HOST_SOLARIS)
   5 #include <ieeefp.h>
   6 #define fabsf(f) ((float)fabs(f))
   7 #else
   8 #include <fenv.h>
   9 #endif
  10
  11 #if defined(__OpenBSD__) || defined(__NetBSD__)
  12 #include <sys/param.h>
  13 #endif
  14
  15 /*
  16  * Define some C99-7.12.3 classification macros and
  17  *        some C99-.12.4 for Solaris systems OS less than 10,
  18  *        or Solaris 10 systems running GCC 3.x or less.
  19  *   Solaris 10 with GCC4 does not need these macros as they
  20  *   are defined in <iso/math_c99.h> with a compiler directive
  21  */
  22 #if defined(HOST_SOLARIS) && (( HOST_SOLARIS <= 9 ) || ((HOST_SOLARIS >= 10) \
  23                                                         && (__GNUC__ < 4))) \
  24     || (defined(__OpenBSD__) && (OpenBSD < 200811))
  25 /*
  26  * C99 7.12.3 classification macros
  27  * and
  28  * C99 7.12.14 comparison macros
  29  *
  30  * ... do not work on Solaris 10 using GNU CC 3.4.x.
  31  * Try to workaround the missing / broken C99 math macros.
  32  */
  33 #if defined(__OpenBSD__)
  34 #define unordered(x, y) (isnan(x) || isnan(y))
  35 #endif
  36
  37 #ifdef __NetBSD__
  38 #ifndef isgreater
  39 #define isgreater(x, y)         __builtin_isgreater(x, y)
  40 #endif
  41 #ifndef isgreaterequal
  42 #define isgreaterequal(x, y)    __builtin_isgreaterequal(x, y)
  43 #endif
  44 #ifndef isless
  45 #define isless(x, y)            __builtin_isless(x, y)
  46 #endif
  47 #ifndef islessequal
  48 #define islessequal(x, y)       __builtin_islessequal(x, y)
  49 #endif
  50 #ifndef isunordered
  51 #define isunordered(x, y)       __builtin_isunordered(x, y)
  52 #endif
  53 #endif
  54
  55
  56 #define isnormal(x)             (fpclass(x) >= FP_NZERO)
  57 #define isgreater(x, y)         ((!unordered(x, y)) && ((x) > (y)))
  58 #define isgreaterequal(x, y)    ((!unordered(x, y)) && ((x) >= (y)))
  59 #define isless(x, y)            ((!unordered(x, y)) && ((x) < (y)))
  60 #define islessequal(x, y)       ((!unordered(x, y)) && ((x) <= (y)))
  61 #define isunordered(x,y)        unordered(x, y)
  62 #endif
  63
  64 #if defined(__sun__) && !defined(NEED_LIBSUNMATH)
  65
  66 #ifndef isnan
  67 # define isnan(x) \
  68     (sizeof (x) == sizeof (long double) ? isnan_ld (x) \
  69      : sizeof (x) == sizeof (double) ? isnan_d (x) \
  70      : isnan_f (x))
  71 static inline int isnan_f  (float       x) { return x != x; }
  72 static inline int isnan_d  (double      x) { return x != x; }
  73 static inline int isnan_ld (long double x) { return x != x; }
  74 #endif
  75
  76 #ifndef isinf
  77 # define isinf(x) \
  78     (sizeof (x) == sizeof (long double) ? isinf_ld (x) \
  79      : sizeof (x) == sizeof (double) ? isinf_d (x) \
  80      : isinf_f (x))
  81 static inline int isinf_f  (float       x) { return isnan (x - x); }
  82 static inline int isinf_d  (double      x) { return isnan (x - x); }
  83 static inline int isinf_ld (long double x) { return isnan (x - x); }
  84 #endif
  85 #endif
  86
  87 typedef float float32;
  88 typedef double float64;
  89 #ifdef FLOATX80
  90 typedef long double floatx80;
  91 #endif
  92
  93 typedef union {
  94     float32 f;
  95     uint32_t i;
  96 } float32u;
  97 typedef union {
  98     float64 f;
  99     uint64_t i;
 100 } float64u;
 101 #ifdef FLOATX80
 102 typedef union {
 103     floatx80 f;
 104     struct {
 105         uint64_t low;
 106         uint16_t high;
 107     } i;
 108 } floatx80u;
 109 #endif
 110
 111 /*----------------------------------------------------------------------------
 112 | Software IEC/IEEE floating-point rounding mode.
 113 *----------------------------------------------------------------------------*/
 114 #if (defined(HOST_BSD) && !defined(__APPLE__)) || defined(HOST_SOLARIS)
 115 #if defined(__OpenBSD__)
 116 #define FE_RM FP_RM
 117 #define FE_RP FP_RP
 118 #define FE_RZ FP_RZ
 119 #endif
 120 enum {
 121     float_round_nearest_even = FP_RN,
 122     float_round_down         = FP_RM,
 123     float_round_up           = FP_RP,
 124     float_round_to_zero      = FP_RZ
 125 };
 126 #elif defined(__arm__)
 127 enum {
 128     float_round_nearest_even = 0,
 129     float_round_down         = 1,
 130     float_round_up           = 2,
 131     float_round_to_zero      = 3
 132 };
 133 #else
 134 enum {
 135     float_round_nearest_even = FE_TONEAREST,
 136     float_round_down         = FE_DOWNWARD,
 137     float_round_up           = FE_UPWARD,
 138     float_round_to_zero      = FE_TOWARDZERO
 139 };
 140 #endif
 141
 142 typedef struct float_status {
 143     int float_rounding_mode;
 144 #ifdef FLOATX80
 145     int floatx80_rounding_precision;
 146 #endif
 147 } float_status;
 148
 149 void set_float_rounding_mode(int val STATUS_PARAM);
 150 #ifdef FLOATX80
 151 void set_floatx80_rounding_precision(int val STATUS_PARAM);
 152 #endif
 153
 154 /*----------------------------------------------------------------------------
 155 | Software IEC/IEEE integer-to-floating-point conversion routines.
 156 *----------------------------------------------------------------------------*/
 157 float32 int32_to_float32( int STATUS_PARAM);
 158 float32 uint32_to_float32( unsigned int STATUS_PARAM);
 159 float64 int32_to_float64( int STATUS_PARAM);
 160 float64 uint32_to_float64( unsigned int STATUS_PARAM);
 161 #ifdef FLOATX80
 162 floatx80 int32_to_floatx80( int STATUS_PARAM);
 163 #endif
 164 #ifdef FLOAT128
 165 float128 int32_to_float128( int STATUS_PARAM);
 166 #endif
 167 float32 int64_to_float32( int64_t STATUS_PARAM);
 168 float32 uint64_to_float32( uint64_t STATUS_PARAM);
 169 float64 int64_to_float64( int64_t STATUS_PARAM);
 170 float64 uint64_to_float64( uint64_t v STATUS_PARAM);
 171 #ifdef FLOATX80
 172 floatx80 int64_to_floatx80( int64_t STATUS_PARAM);
 173 #endif
 174 #ifdef FLOAT128
 175 float128 int64_to_float128( int64_t STATUS_PARAM);
 176 #endif
 177
 178 /*----------------------------------------------------------------------------
 179 | Software IEC/IEEE single-precision conversion routines.
 180 *----------------------------------------------------------------------------*/
 181 int float32_to_int32( float32  STATUS_PARAM);
 182 int float32_to_int32_round_to_zero( float32  STATUS_PARAM);
 183 unsigned int float32_to_uint32( float32 a STATUS_PARAM);
 184 unsigned int float32_to_uint32_round_to_zero( float32 a STATUS_PARAM);
 185 int64_t float32_to_int64( float32  STATUS_PARAM);
 186 int64_t float32_to_int64_round_to_zero( float32  STATUS_PARAM);
 187 float64 float32_to_float64( float32  STATUS_PARAM);
 188 #ifdef FLOATX80
 189 floatx80 float32_to_floatx80( float32  STATUS_PARAM);
 190 #endif
 191 #ifdef FLOAT128
 192 float128 float32_to_float128( float32  STATUS_PARAM);
 193 #endif
 194
 195 /*----------------------------------------------------------------------------
 196 | Software IEC/IEEE single-precision operations.
 197 *----------------------------------------------------------------------------*/
 198 float32 float32_round_to_int( float32  STATUS_PARAM);
 199 INLINE float32 float32_add( float32 a, float32 b STATUS_PARAM)
 200 {
 201     return a + b;
 202 }
 203 INLINE float32 float32_sub( float32 a, float32 b STATUS_PARAM)
 204 {
 205     return a - b;
 206 }
 207 INLINE float32 float32_mul( float32 a, float32 b STATUS_PARAM)
 208 {
 209     return a * b;
 210 }
 211 INLINE float32 float32_div( float32 a, float32 b STATUS_PARAM)
 212 {
 213     return a / b;
 214 }
 215 float32 float32_rem( float32, float32  STATUS_PARAM);
 216 float32 float32_sqrt( float32  STATUS_PARAM);
 217 INLINE int float32_eq( float32 a, float32 b STATUS_PARAM)
 218 {
 219     return a == b;
 220 }
 221 INLINE int float32_le( float32 a, float32 b STATUS_PARAM)
 222 {
 223     return a <= b;
 224 }
 225 INLINE int float32_lt( float32 a, float32 b STATUS_PARAM)
 226 {
 227     return a < b;
 228 }
 229 INLINE int float32_eq_signaling( float32 a, float32 b STATUS_PARAM)
 230 {
 231     return a <= b && a >= b;
 232 }
 233 INLINE int float32_le_quiet( float32 a, float32 b STATUS_PARAM)
 234 {
 235     return islessequal(a, b);
 236 }
 237 INLINE int float32_lt_quiet( float32 a, float32 b STATUS_PARAM)
 238 {
 239     return isless(a, b);
 240 }
 241 INLINE int float32_unordered( float32 a, float32 b STATUS_PARAM)
 242 {
 243     return isunordered(a, b);
 244
 245 }
 246 int float32_compare( float32, float32 STATUS_PARAM );
 247 int float32_compare_quiet( float32, float32 STATUS_PARAM );
 248 int float32_is_signaling_nan( float32 );
 249 int float32_is_nan( float32 );
 250
 251 INLINE float32 float32_abs(float32 a)
 252 {
 253     return fabsf(a);
 254 }
 255
 256 INLINE float32 float32_chs(float32 a)
 257 {
 258     return -a;
 259 }
 260
 261 INLINE float32 float32_is_infinity(float32 a)
 262 {
 263     return fpclassify(a) == FP_INFINITE;
 264 }
 265
 266 INLINE float32 float32_is_neg(float32 a)
 267 {
 268     float32u u;
 269     u.f = a;
 270     return u.i >> 31;
 271 }
 272
 273 INLINE float32 float32_is_zero(float32 a)
 274 {
 275     return fpclassify(a) == FP_ZERO;
 276 }
 277
 278 INLINE float32 float32_scalbn(float32 a, int n)
 279 {
 280     return scalbnf(a, n);
 281 }
 282
 283 /*----------------------------------------------------------------------------
 284 | Software IEC/IEEE double-precision conversion routines.
 285 *----------------------------------------------------------------------------*/
 286 int float64_to_int32( float64 STATUS_PARAM );
 287 int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
 288 unsigned int float64_to_uint32( float64 STATUS_PARAM );
 289 unsigned int float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
 290 int64_t float64_to_int64( float64 STATUS_PARAM );
 291 int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
 292 uint64_t float64_to_uint64( float64 STATUS_PARAM );
 293 uint64_t float64_to_uint64_round_to_zero( float64 STATUS_PARAM );
 294 float32 float64_to_float32( float64 STATUS_PARAM );
 295 #ifdef FLOATX80
 296 floatx80 float64_to_floatx80( float64 STATUS_PARAM );
 297 #endif
 298 #ifdef FLOAT128
 299 float128 float64_to_float128( float64 STATUS_PARAM );
 300 #endif
 301
 302 /*----------------------------------------------------------------------------
 303 | Software IEC/IEEE double-precision operations.
 304 *----------------------------------------------------------------------------*/
 305 float64 float64_round_to_int( float64 STATUS_PARAM );
 306 float64 float64_trunc_to_int( float64 STATUS_PARAM );
 307 INLINE float64 float64_add( float64 a, float64 b STATUS_PARAM)
 308 {
 309     return a + b;
 310 }
 311 INLINE float64 float64_sub( float64 a, float64 b STATUS_PARAM)
 312 {
 313     return a - b;
 314 }
 315 INLINE float64 float64_mul( float64 a, float64 b STATUS_PARAM)
 316 {
 317     return a * b;
 318 }
 319 INLINE float64 float64_div( float64 a, float64 b STATUS_PARAM)
 320 {
 321     return a / b;
 322 }
 323 float64 float64_rem( float64, float64 STATUS_PARAM );
 324 float64 float64_sqrt( float64 STATUS_PARAM );
 325 INLINE int float64_eq( float64 a, float64 b STATUS_PARAM)
 326 {
 327     return a == b;
 328 }
 329 INLINE int float64_le( float64 a, float64 b STATUS_PARAM)
 330 {
 331     return a <= b;
 332 }
 333 INLINE int float64_lt( float64 a, float64 b STATUS_PARAM)
 334 {
 335     return a < b;
 336 }
 337 INLINE int float64_eq_signaling( float64 a, float64 b STATUS_PARAM)
 338 {
 339     return a <= b && a >= b;
 340 }
 341 INLINE int float64_le_quiet( float64 a, float64 b STATUS_PARAM)
 342 {
 343     return islessequal(a, b);
 344 }
 345 INLINE int float64_lt_quiet( float64 a, float64 b STATUS_PARAM)
 346 {
 347     return isless(a, b);
 348
 349 }
 350 INLINE int float64_unordered( float64 a, float64 b STATUS_PARAM)
 351 {
 352     return isunordered(a, b);
 353
 354 }
 355 int float64_compare( float64, float64 STATUS_PARAM );
 356 int float64_compare_quiet( float64, float64 STATUS_PARAM );
 357 int float64_is_signaling_nan( float64 );
 358 int float64_is_nan( float64 );
 359
 360 INLINE float64 float64_abs(float64 a)
 361 {
 362     return fabs(a);
 363 }
 364
 365 INLINE float64 float64_chs(float64 a)
 366 {
 367     return -a;
 368 }
 369
 370 INLINE float64 float64_is_infinity(float64 a)
 371 {
 372     return fpclassify(a) == FP_INFINITE;
 373 }
 374
 375 INLINE float64 float64_is_neg(float64 a)
 376 {
 377     float64u u;
 378     u.f = a;
 379     return u.i >> 63;
 380 }
 381
 382 INLINE float64 float64_is_zero(float64 a)
 383 {
 384     return fpclassify(a) == FP_ZERO;
 385 }
 386
 387 INLINE float64 float64_scalbn(float64 a, int n)
 388 {
 389     return scalbn(a, n);
 390 }
 391
 392 #ifdef FLOATX80
 393
 394 /*----------------------------------------------------------------------------
 395 | Software IEC/IEEE extended double-precision conversion routines.
 396 *----------------------------------------------------------------------------*/
 397 int floatx80_to_int32( floatx80 STATUS_PARAM );
 398 int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
 399 int64_t floatx80_to_int64( floatx80 STATUS_PARAM);
 400 int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM);
 401 float32 floatx80_to_float32( floatx80 STATUS_PARAM );
 402 float64 floatx80_to_float64( floatx80 STATUS_PARAM );
 403 #ifdef FLOAT128
 404 float128 floatx80_to_float128( floatx80 STATUS_PARAM );
 405 #endif
 406
 407 /*----------------------------------------------------------------------------
 408 | Software IEC/IEEE extended double-precision operations.
 409 *----------------------------------------------------------------------------*/
 410 floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
 411 INLINE floatx80 floatx80_add( floatx80 a, floatx80 b STATUS_PARAM)
 412 {
 413     return a + b;
 414 }
 415 INLINE floatx80 floatx80_sub( floatx80 a, floatx80 b STATUS_PARAM)
 416 {
 417     return a - b;
 418 }
 419 INLINE floatx80 floatx80_mul( floatx80 a, floatx80 b STATUS_PARAM)
 420 {
 421     return a * b;
 422 }
 423 INLINE floatx80 floatx80_div( floatx80 a, floatx80 b STATUS_PARAM)
 424 {
 425     return a / b;
 426 }
 427 floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
 428 floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
 429 INLINE int floatx80_eq( floatx80 a, floatx80 b STATUS_PARAM)
 430 {
 431     return a == b;
 432 }
 433 INLINE int floatx80_le( floatx80 a, floatx80 b STATUS_PARAM)
 434 {
 435     return a <= b;
 436 }
 437 INLINE int floatx80_lt( floatx80 a, floatx80 b STATUS_PARAM)
 438 {
 439     return a < b;
 440 }
 441 INLINE int floatx80_eq_signaling( floatx80 a, floatx80 b STATUS_PARAM)
 442 {
 443     return a <= b && a >= b;
 444 }
 445 INLINE int floatx80_le_quiet( floatx80 a, floatx80 b STATUS_PARAM)
 446 {
 447     return islessequal(a, b);
 448 }
 449 INLINE int floatx80_lt_quiet( floatx80 a, floatx80 b STATUS_PARAM)
 450 {
 451     return isless(a, b);
 452
 453 }
 454 INLINE int floatx80_unordered( floatx80 a, floatx80 b STATUS_PARAM)
 455 {
 456     return isunordered(a, b);
 457
 458 }
 459 int floatx80_compare( floatx80, floatx80 STATUS_PARAM );
 460 int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
 461 int floatx80_is_signaling_nan( floatx80 );
 462 int floatx80_is_nan( floatx80 );
 463
 464 INLINE floatx80 floatx80_abs(floatx80 a)
 465 {
 466     return fabsl(a);
 467 }
 468
 469 INLINE floatx80 floatx80_chs(floatx80 a)
 470 {
 471     return -a;
 472 }
 473
 474 INLINE floatx80 floatx80_is_infinity(floatx80 a)
 475 {
 476     return fpclassify(a) == FP_INFINITE;
 477 }
 478
 479 INLINE floatx80 floatx80_is_neg(floatx80 a)
 480 {
 481     floatx80u u;
 482     u.f = a;
 483     return u.i.high >> 15;
 484 }
 485
 486 INLINE floatx80 floatx80_is_zero(floatx80 a)
 487 {
 488     return fpclassify(a) == FP_ZERO;
 489 }
 490
 491 INLINE floatx80 floatx80_scalbn(floatx80 a, int n)
 492 {
 493     return scalbnl(a, n);
 494 }
 495
 496 #endif