fpu/softfloat-native.h

   1 /* Native implementation of soft float functions */
   2 #include <math.h>
   3
   4 #if (defined(CONFIG_BSD) && !defined(__APPLE__) && !defined(__GLIBC__)) \
   5     || defined(CONFIG_SOLARIS)
   6 #include <ieeefp.h>
   7 #define fabsf(f) ((float)fabs(f))
   8 #else
   9 #include <fenv.h>
  10 #endif
  11
  12 #if defined(__OpenBSD__) || defined(__NetBSD__)
  13 #include <sys/param.h>
  14 #endif
  15
  16 /*
  17  * Define some C99-7.12.3 classification macros and
  18  *        some C99-.12.4 for Solaris systems OS less than 10,
  19  *        or Solaris 10 systems running GCC 3.x or less.
  20  *   Solaris 10 with GCC4 does not need these macros as they
  21  *   are defined in <iso/math_c99.h> with a compiler directive
  22  */
  23 #if defined(CONFIG_SOLARIS) && \
  24            ((CONFIG_SOLARIS_VERSION <= 9 ) || \
  25            ((CONFIG_SOLARIS_VERSION >= 10) && (__GNUC__ < 4))) \
  26     || (defined(__OpenBSD__) && (OpenBSD < 200811))
  27 /*
  28  * C99 7.12.3 classification macros
  29  * and
  30  * C99 7.12.14 comparison macros
  31  *
  32  * ... do not work on Solaris 10 using GNU CC 3.4.x.
  33  * Try to workaround the missing / broken C99 math macros.
  34  */
  35 #if defined(__OpenBSD__)
  36 #define unordered(x, y) (isnan(x) || isnan(y))
  37 #endif
  38
  39 #ifdef __NetBSD__
  40 #ifndef isgreater
  41 #define isgreater(x, y)         __builtin_isgreater(x, y)
  42 #endif
  43 #ifndef isgreaterequal
  44 #define isgreaterequal(x, y)    __builtin_isgreaterequal(x, y)
  45 #endif
  46 #ifndef isless
  47 #define isless(x, y)            __builtin_isless(x, y)
  48 #endif
  49 #ifndef islessequal
  50 #define islessequal(x, y)       __builtin_islessequal(x, y)
  51 #endif
  52 #ifndef isunordered
  53 #define isunordered(x, y)       __builtin_isunordered(x, y)
  54 #endif
  55 #endif
  56
  57
  58 #define isnormal(x)             (fpclass(x) >= FP_NZERO)
  59 #define isgreater(x, y)         ((!unordered(x, y)) && ((x) > (y)))
  60 #define isgreaterequal(x, y)    ((!unordered(x, y)) && ((x) >= (y)))
  61 #define isless(x, y)            ((!unordered(x, y)) && ((x) < (y)))
  62 #define islessequal(x, y)       ((!unordered(x, y)) && ((x) <= (y)))
  63 #define isunordered(x,y)        unordered(x, y)
  64 #endif
  65
  66 #if defined(__sun__) && !defined(CONFIG_NEEDS_LIBSUNMATH)
  67
  68 #ifndef isnan
  69 # define isnan(x) \
  70     (sizeof (x) == sizeof (long double) ? isnan_ld (x) \
  71      : sizeof (x) == sizeof (double) ? isnan_d (x) \
  72      : isnan_f (x))
  73 static inline int isnan_f  (float       x) { return x != x; }
  74 static inline int isnan_d  (double      x) { return x != x; }
  75 static inline int isnan_ld (long double x) { return x != x; }
  76 #endif
  77
  78 #ifndef isinf
  79 # define isinf(x) \
  80     (sizeof (x) == sizeof (long double) ? isinf_ld (x) \
  81      : sizeof (x) == sizeof (double) ? isinf_d (x) \
  82      : isinf_f (x))
  83 static inline int isinf_f  (float       x) { return isnan (x - x); }
  84 static inline int isinf_d  (double      x) { return isnan (x - x); }
  85 static inline int isinf_ld (long double x) { return isnan (x - x); }
  86 #endif
  87 #endif
  88
  89 typedef float float32;
  90 typedef double float64;
  91 #ifdef FLOATX80
  92 typedef long double floatx80;
  93 #endif
  94
  95 typedef union {
  96     float32 f;
  97     uint32_t i;
  98 } float32u;
  99 typedef union {
 100     float64 f;
 101     uint64_t i;
 102 } float64u;
 103 #ifdef FLOATX80
 104 typedef union {
 105     floatx80 f;
 106     struct {
 107         uint64_t low;
 108         uint16_t high;
 109     } i;
 110 } floatx80u;
 111 #endif
 112
 113 /*----------------------------------------------------------------------------
 114 | Software IEC/IEEE floating-point rounding mode.
 115 *----------------------------------------------------------------------------*/
 116 #if (defined(CONFIG_BSD) && !defined(__APPLE__) && !defined(__GLIBC__)) \
 117     || defined(CONFIG_SOLARIS)
 118 #if defined(__OpenBSD__)
 119 #define FE_RM FP_RM
 120 #define FE_RP FP_RP
 121 #define FE_RZ FP_RZ
 122 #endif
 123 enum {
 124     float_round_nearest_even = FP_RN,
 125     float_round_down         = FP_RM,
 126     float_round_up           = FP_RP,
 127     float_round_to_zero      = FP_RZ
 128 };
 129 #elif defined(__arm__)
 130 enum {
 131     float_round_nearest_even = 0,
 132     float_round_down         = 1,
 133     float_round_up           = 2,
 134     float_round_to_zero      = 3
 135 };
 136 #else
 137 enum {
 138     float_round_nearest_even = FE_TONEAREST,
 139     float_round_down         = FE_DOWNWARD,
 140     float_round_up           = FE_UPWARD,
 141     float_round_to_zero      = FE_TOWARDZERO
 142 };
 143 #endif
 144
 145 typedef struct float_status {
 146     int float_rounding_mode;
 147 #ifdef FLOATX80
 148     int floatx80_rounding_precision;
 149 #endif
 150 } float_status;
 151
 152 void set_float_rounding_mode(int val STATUS_PARAM);
 153 #ifdef FLOATX80
 154 void set_floatx80_rounding_precision(int val STATUS_PARAM);
 155 #endif
 156
 157 /*----------------------------------------------------------------------------
 158 | Software IEC/IEEE integer-to-floating-point conversion routines.
 159 *----------------------------------------------------------------------------*/
 160 float32 int32_to_float32( int STATUS_PARAM);
 161 float32 uint32_to_float32( unsigned int STATUS_PARAM);
 162 float64 int32_to_float64( int STATUS_PARAM);
 163 float64 uint32_to_float64( unsigned int STATUS_PARAM);
 164 #ifdef FLOATX80
 165 floatx80 int32_to_floatx80( int STATUS_PARAM);
 166 #endif
 167 #ifdef FLOAT128
 168 float128 int32_to_float128( int STATUS_PARAM);
 169 #endif
 170 float32 int64_to_float32( int64_t STATUS_PARAM);
 171 float32 uint64_to_float32( uint64_t STATUS_PARAM);
 172 float64 int64_to_float64( int64_t STATUS_PARAM);
 173 float64 uint64_to_float64( uint64_t v STATUS_PARAM);
 174 #ifdef FLOATX80
 175 floatx80 int64_to_floatx80( int64_t STATUS_PARAM);
 176 #endif
 177 #ifdef FLOAT128
 178 float128 int64_to_float128( int64_t STATUS_PARAM);
 179 #endif
 180
 181 /*----------------------------------------------------------------------------
 182 | Software IEC/IEEE single-precision conversion routines.
 183 *----------------------------------------------------------------------------*/
 184 int float32_to_int32( float32  STATUS_PARAM);
 185 int float32_to_int32_round_to_zero( float32  STATUS_PARAM);
 186 unsigned int float32_to_uint32( float32 a STATUS_PARAM);
 187 unsigned int float32_to_uint32_round_to_zero( float32 a STATUS_PARAM);
 188 int64_t float32_to_int64( float32  STATUS_PARAM);
 189 int64_t float32_to_int64_round_to_zero( float32  STATUS_PARAM);
 190 float64 float32_to_float64( float32  STATUS_PARAM);
 191 #ifdef FLOATX80
 192 floatx80 float32_to_floatx80( float32  STATUS_PARAM);
 193 #endif
 194 #ifdef FLOAT128
 195 float128 float32_to_float128( float32  STATUS_PARAM);
 196 #endif
 197
 198 /*----------------------------------------------------------------------------
 199 | Software IEC/IEEE single-precision operations.
 200 *----------------------------------------------------------------------------*/
 201 float32 float32_round_to_int( float32  STATUS_PARAM);
 202 INLINE float32 float32_add( float32 a, float32 b STATUS_PARAM)
 203 {
 204     return a + b;
 205 }
 206 INLINE float32 float32_sub( float32 a, float32 b STATUS_PARAM)
 207 {
 208     return a - b;
 209 }
 210 INLINE float32 float32_mul( float32 a, float32 b STATUS_PARAM)
 211 {
 212     return a * b;
 213 }
 214 INLINE float32 float32_div( float32 a, float32 b STATUS_PARAM)
 215 {
 216     return a / b;
 217 }
 218 float32 float32_rem( float32, float32  STATUS_PARAM);
 219 float32 float32_sqrt( float32  STATUS_PARAM);
 220 INLINE int float32_eq( float32 a, float32 b STATUS_PARAM)
 221 {
 222     return a == b;
 223 }
 224 INLINE int float32_le( float32 a, float32 b STATUS_PARAM)
 225 {
 226     return a <= b;
 227 }
 228 INLINE int float32_lt( float32 a, float32 b STATUS_PARAM)
 229 {
 230     return a < b;
 231 }
 232 INLINE int float32_eq_signaling( float32 a, float32 b STATUS_PARAM)
 233 {
 234     return a <= b && a >= b;
 235 }
 236 INLINE int float32_le_quiet( float32 a, float32 b STATUS_PARAM)
 237 {
 238     return islessequal(a, b);
 239 }
 240 INLINE int float32_lt_quiet( float32 a, float32 b STATUS_PARAM)
 241 {
 242     return isless(a, b);
 243 }
 244 INLINE int float32_unordered( float32 a, float32 b STATUS_PARAM)
 245 {
 246     return isunordered(a, b);
 247
 248 }
 249 int float32_compare( float32, float32 STATUS_PARAM );
 250 int float32_compare_quiet( float32, float32 STATUS_PARAM );
 251 int float32_is_signaling_nan( float32 );
 252 int float32_is_nan( float32 );
 253
 254 INLINE float32 float32_abs(float32 a)
 255 {
 256     return fabsf(a);
 257 }
 258
 259 INLINE float32 float32_chs(float32 a)
 260 {
 261     return -a;
 262 }
 263
 264 INLINE float32 float32_is_infinity(float32 a)
 265 {
 266     return fpclassify(a) == FP_INFINITE;
 267 }
 268
 269 INLINE float32 float32_is_neg(float32 a)
 270 {
 271     float32u u;
 272     u.f = a;
 273     return u.i >> 31;
 274 }
 275
 276 INLINE float32 float32_is_zero(float32 a)
 277 {
 278     return fpclassify(a) == FP_ZERO;
 279 }
 280
 281 INLINE float32 float32_scalbn(float32 a, int n)
 282 {
 283     return scalbnf(a, n);
 284 }
 285
 286 /*----------------------------------------------------------------------------
 287 | Software IEC/IEEE double-precision conversion routines.
 288 *----------------------------------------------------------------------------*/
 289 int float64_to_int32( float64 STATUS_PARAM );
 290 int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
 291 unsigned int float64_to_uint32( float64 STATUS_PARAM );
 292 unsigned int float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
 293 int64_t float64_to_int64( float64 STATUS_PARAM );
 294 int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
 295 uint64_t float64_to_uint64( float64 STATUS_PARAM );
 296 uint64_t float64_to_uint64_round_to_zero( float64 STATUS_PARAM );
 297 float32 float64_to_float32( float64 STATUS_PARAM );
 298 #ifdef FLOATX80
 299 floatx80 float64_to_floatx80( float64 STATUS_PARAM );
 300 #endif
 301 #ifdef FLOAT128
 302 float128 float64_to_float128( float64 STATUS_PARAM );
 303 #endif
 304
 305 /*----------------------------------------------------------------------------
 306 | Software IEC/IEEE double-precision operations.
 307 *----------------------------------------------------------------------------*/
 308 float64 float64_round_to_int( float64 STATUS_PARAM );
 309 float64 float64_trunc_to_int( float64 STATUS_PARAM );
 310 INLINE float64 float64_add( float64 a, float64 b STATUS_PARAM)
 311 {
 312     return a + b;
 313 }
 314 INLINE float64 float64_sub( float64 a, float64 b STATUS_PARAM)
 315 {
 316     return a - b;
 317 }
 318 INLINE float64 float64_mul( float64 a, float64 b STATUS_PARAM)
 319 {
 320     return a * b;
 321 }
 322 INLINE float64 float64_div( float64 a, float64 b STATUS_PARAM)
 323 {
 324     return a / b;
 325 }
 326 float64 float64_rem( float64, float64 STATUS_PARAM );
 327 float64 float64_sqrt( float64 STATUS_PARAM );
 328 INLINE int float64_eq( float64 a, float64 b STATUS_PARAM)
 329 {
 330     return a == b;
 331 }
 332 INLINE int float64_le( float64 a, float64 b STATUS_PARAM)
 333 {
 334     return a <= b;
 335 }
 336 INLINE int float64_lt( float64 a, float64 b STATUS_PARAM)
 337 {
 338     return a < b;
 339 }
 340 INLINE int float64_eq_signaling( float64 a, float64 b STATUS_PARAM)
 341 {
 342     return a <= b && a >= b;
 343 }
 344 INLINE int float64_le_quiet( float64 a, float64 b STATUS_PARAM)
 345 {
 346     return islessequal(a, b);
 347 }
 348 INLINE int float64_lt_quiet( float64 a, float64 b STATUS_PARAM)
 349 {
 350     return isless(a, b);
 351
 352 }
 353 INLINE int float64_unordered( float64 a, float64 b STATUS_PARAM)
 354 {
 355     return isunordered(a, b);
 356
 357 }
 358 int float64_compare( float64, float64 STATUS_PARAM );
 359 int float64_compare_quiet( float64, float64 STATUS_PARAM );
 360 int float64_is_signaling_nan( float64 );
 361 int float64_is_nan( float64 );
 362
 363 INLINE float64 float64_abs(float64 a)
 364 {
 365     return fabs(a);
 366 }
 367
 368 INLINE float64 float64_chs(float64 a)
 369 {
 370     return -a;
 371 }
 372
 373 INLINE float64 float64_is_infinity(float64 a)
 374 {
 375     return fpclassify(a) == FP_INFINITE;
 376 }
 377
 378 INLINE float64 float64_is_neg(float64 a)
 379 {
 380     float64u u;
 381     u.f = a;
 382     return u.i >> 63;
 383 }
 384
 385 INLINE float64 float64_is_zero(float64 a)
 386 {
 387     return fpclassify(a) == FP_ZERO;
 388 }
 389
 390 INLINE float64 float64_scalbn(float64 a, int n)
 391 {
 392     return scalbn(a, n);
 393 }
 394
 395 #ifdef FLOATX80
 396
 397 /*----------------------------------------------------------------------------
 398 | Software IEC/IEEE extended double-precision conversion routines.
 399 *----------------------------------------------------------------------------*/
 400 int floatx80_to_int32( floatx80 STATUS_PARAM );
 401 int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
 402 int64_t floatx80_to_int64( floatx80 STATUS_PARAM);
 403 int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM);
 404 float32 floatx80_to_float32( floatx80 STATUS_PARAM );
 405 float64 floatx80_to_float64( floatx80 STATUS_PARAM );
 406 #ifdef FLOAT128
 407 float128 floatx80_to_float128( floatx80 STATUS_PARAM );
 408 #endif
 409
 410 /*----------------------------------------------------------------------------
 411 | Software IEC/IEEE extended double-precision operations.
 412 *----------------------------------------------------------------------------*/
 413 floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
 414 INLINE floatx80 floatx80_add( floatx80 a, floatx80 b STATUS_PARAM)
 415 {
 416     return a + b;
 417 }
 418 INLINE floatx80 floatx80_sub( floatx80 a, floatx80 b STATUS_PARAM)
 419 {
 420     return a - b;
 421 }
 422 INLINE floatx80 floatx80_mul( floatx80 a, floatx80 b STATUS_PARAM)
 423 {
 424     return a * b;
 425 }
 426 INLINE floatx80 floatx80_div( floatx80 a, floatx80 b STATUS_PARAM)
 427 {
 428     return a / b;
 429 }
 430 floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
 431 floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
 432 INLINE int floatx80_eq( floatx80 a, floatx80 b STATUS_PARAM)
 433 {
 434     return a == b;
 435 }
 436 INLINE int floatx80_le( floatx80 a, floatx80 b STATUS_PARAM)
 437 {
 438     return a <= b;
 439 }
 440 INLINE int floatx80_lt( floatx80 a, floatx80 b STATUS_PARAM)
 441 {
 442     return a < b;
 443 }
 444 INLINE int floatx80_eq_signaling( floatx80 a, floatx80 b STATUS_PARAM)
 445 {
 446     return a <= b && a >= b;
 447 }
 448 INLINE int floatx80_le_quiet( floatx80 a, floatx80 b STATUS_PARAM)
 449 {
 450     return islessequal(a, b);
 451 }
 452 INLINE int floatx80_lt_quiet( floatx80 a, floatx80 b STATUS_PARAM)
 453 {
 454     return isless(a, b);
 455
 456 }
 457 INLINE int floatx80_unordered( floatx80 a, floatx80 b STATUS_PARAM)
 458 {
 459     return isunordered(a, b);
 460
 461 }
 462 int floatx80_compare( floatx80, floatx80 STATUS_PARAM );
 463 int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
 464 int floatx80_is_signaling_nan( floatx80 );
 465 int floatx80_is_nan( floatx80 );
 466
 467 INLINE floatx80 floatx80_abs(floatx80 a)
 468 {
 469     return fabsl(a);
 470 }
 471
 472 INLINE floatx80 floatx80_chs(floatx80 a)
 473 {
 474     return -a;
 475 }
 476
 477 INLINE floatx80 floatx80_is_infinity(floatx80 a)
 478 {
 479     return fpclassify(a) == FP_INFINITE;
 480 }
 481
 482 INLINE floatx80 floatx80_is_neg(floatx80 a)
 483 {
 484     floatx80u u;
 485     u.f = a;
 486     return u.i.high >> 15;
 487 }
 488
 489 INLINE floatx80 floatx80_is_zero(floatx80 a)
 490 {
 491     return fpclassify(a) == FP_ZERO;
 492 }
 493
 494 INLINE floatx80 floatx80_scalbn(floatx80 a, int n)
 495 {
 496     return scalbnl(a, n);
 497 }
 498
 499 #endif