fpu/softfloat-native.h

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