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 #else
 130 enum {
 131     float_round_nearest_even = FE_TONEAREST,
 132     float_round_down         = FE_DOWNWARD,
 133     float_round_up           = FE_UPWARD,
 134     float_round_to_zero      = FE_TOWARDZERO
 135 };
 136 #endif
 137
 138 typedef struct float_status {
 139     int float_rounding_mode;
 140 #ifdef FLOATX80
 141     int floatx80_rounding_precision;
 142 #endif
 143 } float_status;
 144
 145 void set_float_rounding_mode(int val STATUS_PARAM);
 146 #ifdef FLOATX80
 147 void set_floatx80_rounding_precision(int val STATUS_PARAM);
 148 #endif
 149
 150 /*----------------------------------------------------------------------------
 151 | Software IEC/IEEE integer-to-floating-point conversion routines.
 152 *----------------------------------------------------------------------------*/
 153 float32 int32_to_float32( int STATUS_PARAM);
 154 float32 uint32_to_float32( unsigned int STATUS_PARAM);
 155 float64 int32_to_float64( int STATUS_PARAM);
 156 float64 uint32_to_float64( unsigned int STATUS_PARAM);
 157 #ifdef FLOATX80
 158 floatx80 int32_to_floatx80( int STATUS_PARAM);
 159 #endif
 160 #ifdef FLOAT128
 161 float128 int32_to_float128( int STATUS_PARAM);
 162 #endif
 163 float32 int64_to_float32( int64_t STATUS_PARAM);
 164 float32 uint64_to_float32( uint64_t STATUS_PARAM);
 165 float64 int64_to_float64( int64_t STATUS_PARAM);
 166 float64 uint64_to_float64( uint64_t v STATUS_PARAM);
 167 #ifdef FLOATX80
 168 floatx80 int64_to_floatx80( int64_t STATUS_PARAM);
 169 #endif
 170 #ifdef FLOAT128
 171 float128 int64_to_float128( int64_t STATUS_PARAM);
 172 #endif
 173
 174 /*----------------------------------------------------------------------------
 175 | Software IEC/IEEE single-precision conversion routines.
 176 *----------------------------------------------------------------------------*/
 177 int float32_to_int32( float32  STATUS_PARAM);
 178 int float32_to_int32_round_to_zero( float32  STATUS_PARAM);
 179 unsigned int float32_to_uint32( float32 a STATUS_PARAM);
 180 unsigned int float32_to_uint32_round_to_zero( float32 a STATUS_PARAM);
 181 int64_t float32_to_int64( float32  STATUS_PARAM);
 182 int64_t float32_to_int64_round_to_zero( float32  STATUS_PARAM);
 183 float64 float32_to_float64( float32  STATUS_PARAM);
 184 #ifdef FLOATX80
 185 floatx80 float32_to_floatx80( float32  STATUS_PARAM);
 186 #endif
 187 #ifdef FLOAT128
 188 float128 float32_to_float128( float32  STATUS_PARAM);
 189 #endif
 190
 191 /*----------------------------------------------------------------------------
 192 | Software IEC/IEEE single-precision operations.
 193 *----------------------------------------------------------------------------*/
 194 float32 float32_round_to_int( float32  STATUS_PARAM);
 195 INLINE float32 float32_add( float32 a, float32 b STATUS_PARAM)
 196 {
 197     return a + b;
 198 }
 199 INLINE float32 float32_sub( float32 a, float32 b STATUS_PARAM)
 200 {
 201     return a - b;
 202 }
 203 INLINE float32 float32_mul( float32 a, float32 b STATUS_PARAM)
 204 {
 205     return a * b;
 206 }
 207 INLINE float32 float32_div( float32 a, float32 b STATUS_PARAM)
 208 {
 209     return a / b;
 210 }
 211 float32 float32_rem( float32, float32  STATUS_PARAM);
 212 float32 float32_sqrt( float32  STATUS_PARAM);
 213 INLINE int float32_eq( float32 a, float32 b STATUS_PARAM)
 214 {
 215     return a == b;
 216 }
 217 INLINE int float32_le( float32 a, float32 b STATUS_PARAM)
 218 {
 219     return a <= b;
 220 }
 221 INLINE int float32_lt( float32 a, float32 b STATUS_PARAM)
 222 {
 223     return a < b;
 224 }
 225 INLINE int float32_eq_signaling( float32 a, float32 b STATUS_PARAM)
 226 {
 227     return a <= b && a >= b;
 228 }
 229 INLINE int float32_le_quiet( float32 a, float32 b STATUS_PARAM)
 230 {
 231     return islessequal(a, b);
 232 }
 233 INLINE int float32_lt_quiet( float32 a, float32 b STATUS_PARAM)
 234 {
 235     return isless(a, b);
 236 }
 237 INLINE int float32_unordered( float32 a, float32 b STATUS_PARAM)
 238 {
 239     return isunordered(a, b);
 240
 241 }
 242 int float32_compare( float32, float32 STATUS_PARAM );
 243 int float32_compare_quiet( float32, float32 STATUS_PARAM );
 244 int float32_is_signaling_nan( float32 );
 245 int float32_is_nan( float32 );
 246
 247 INLINE float32 float32_abs(float32 a)
 248 {
 249     return fabsf(a);
 250 }
 251
 252 INLINE float32 float32_chs(float32 a)
 253 {
 254     return -a;
 255 }
 256
 257 INLINE float32 float32_is_infinity(float32 a)
 258 {
 259     return fpclassify(a) == FP_INFINITE;
 260 }
 261
 262 INLINE float32 float32_is_neg(float32 a)
 263 {
 264     float32u u;
 265     u.f = a;
 266     return u.i >> 31;
 267 }
 268
 269 INLINE float32 float32_is_zero(float32 a)
 270 {
 271     return fpclassify(a) == FP_ZERO;
 272 }
 273
 274 INLINE float32 float32_scalbn(float32 a, int n)
 275 {
 276     return scalbnf(a, n);
 277 }
 278
 279 /*----------------------------------------------------------------------------
 280 | Software IEC/IEEE double-precision conversion routines.
 281 *----------------------------------------------------------------------------*/
 282 int float64_to_int32( float64 STATUS_PARAM );
 283 int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
 284 unsigned int float64_to_uint32( float64 STATUS_PARAM );
 285 unsigned int float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
 286 int64_t float64_to_int64( float64 STATUS_PARAM );
 287 int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
 288 uint64_t float64_to_uint64( float64 STATUS_PARAM );
 289 uint64_t float64_to_uint64_round_to_zero( float64 STATUS_PARAM );
 290 float32 float64_to_float32( float64 STATUS_PARAM );
 291 #ifdef FLOATX80
 292 floatx80 float64_to_floatx80( float64 STATUS_PARAM );
 293 #endif
 294 #ifdef FLOAT128
 295 float128 float64_to_float128( float64 STATUS_PARAM );
 296 #endif
 297
 298 /*----------------------------------------------------------------------------
 299 | Software IEC/IEEE double-precision operations.
 300 *----------------------------------------------------------------------------*/
 301 float64 float64_round_to_int( float64 STATUS_PARAM );
 302 float64 float64_trunc_to_int( float64 STATUS_PARAM );
 303 INLINE float64 float64_add( float64 a, float64 b STATUS_PARAM)
 304 {
 305     return a + b;
 306 }
 307 INLINE float64 float64_sub( float64 a, float64 b STATUS_PARAM)
 308 {
 309     return a - b;
 310 }
 311 INLINE float64 float64_mul( float64 a, float64 b STATUS_PARAM)
 312 {
 313     return a * b;
 314 }
 315 INLINE float64 float64_div( float64 a, float64 b STATUS_PARAM)
 316 {
 317     return a / b;
 318 }
 319 float64 float64_rem( float64, float64 STATUS_PARAM );
 320 float64 float64_sqrt( float64 STATUS_PARAM );
 321 INLINE int float64_eq( float64 a, float64 b STATUS_PARAM)
 322 {
 323     return a == b;
 324 }
 325 INLINE int float64_le( float64 a, float64 b STATUS_PARAM)
 326 {
 327     return a <= b;
 328 }
 329 INLINE int float64_lt( float64 a, float64 b STATUS_PARAM)
 330 {
 331     return a < b;
 332 }
 333 INLINE int float64_eq_signaling( float64 a, float64 b STATUS_PARAM)
 334 {
 335     return a <= b && a >= b;
 336 }
 337 INLINE int float64_le_quiet( float64 a, float64 b STATUS_PARAM)
 338 {
 339     return islessequal(a, b);
 340 }
 341 INLINE int float64_lt_quiet( float64 a, float64 b STATUS_PARAM)
 342 {
 343     return isless(a, b);
 344
 345 }
 346 INLINE int float64_unordered( float64 a, float64 b STATUS_PARAM)
 347 {
 348     return isunordered(a, b);
 349
 350 }
 351 int float64_compare( float64, float64 STATUS_PARAM );
 352 int float64_compare_quiet( float64, float64 STATUS_PARAM );
 353 int float64_is_signaling_nan( float64 );
 354 int float64_is_nan( float64 );
 355
 356 INLINE float64 float64_abs(float64 a)
 357 {
 358     return fabs(a);
 359 }
 360
 361 INLINE float64 float64_chs(float64 a)
 362 {
 363     return -a;
 364 }
 365
 366 INLINE float64 float64_is_infinity(float64 a)
 367 {
 368     return fpclassify(a) == FP_INFINITE;
 369 }
 370
 371 INLINE float64 float64_is_neg(float64 a)
 372 {
 373     float64u u;
 374     u.f = a;
 375     return u.i >> 63;
 376 }
 377
 378 INLINE float64 float64_is_zero(float64 a)
 379 {
 380     return fpclassify(a) == FP_ZERO;
 381 }
 382
 383 INLINE float64 float64_scalbn(float64 a, int n)
 384 {
 385     return scalbn(a, n);
 386 }
 387
 388 #ifdef FLOATX80
 389
 390 /*----------------------------------------------------------------------------
 391 | Software IEC/IEEE extended double-precision conversion routines.
 392 *----------------------------------------------------------------------------*/
 393 int floatx80_to_int32( floatx80 STATUS_PARAM );
 394 int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
 395 int64_t floatx80_to_int64( floatx80 STATUS_PARAM);
 396 int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM);
 397 float32 floatx80_to_float32( floatx80 STATUS_PARAM );
 398 float64 floatx80_to_float64( floatx80 STATUS_PARAM );
 399 #ifdef FLOAT128
 400 float128 floatx80_to_float128( floatx80 STATUS_PARAM );
 401 #endif
 402
 403 /*----------------------------------------------------------------------------
 404 | Software IEC/IEEE extended double-precision operations.
 405 *----------------------------------------------------------------------------*/
 406 floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
 407 INLINE floatx80 floatx80_add( floatx80 a, floatx80 b STATUS_PARAM)
 408 {
 409     return a + b;
 410 }
 411 INLINE floatx80 floatx80_sub( floatx80 a, floatx80 b STATUS_PARAM)
 412 {
 413     return a - b;
 414 }
 415 INLINE floatx80 floatx80_mul( floatx80 a, floatx80 b STATUS_PARAM)
 416 {
 417     return a * b;
 418 }
 419 INLINE floatx80 floatx80_div( floatx80 a, floatx80 b STATUS_PARAM)
 420 {
 421     return a / b;
 422 }
 423 floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
 424 floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
 425 INLINE int floatx80_eq( floatx80 a, floatx80 b STATUS_PARAM)
 426 {
 427     return a == b;
 428 }
 429 INLINE int floatx80_le( floatx80 a, floatx80 b STATUS_PARAM)
 430 {
 431     return a <= b;
 432 }
 433 INLINE int floatx80_lt( floatx80 a, floatx80 b STATUS_PARAM)
 434 {
 435     return a < b;
 436 }
 437 INLINE int floatx80_eq_signaling( floatx80 a, floatx80 b STATUS_PARAM)
 438 {
 439     return a <= b && a >= b;
 440 }
 441 INLINE int floatx80_le_quiet( floatx80 a, floatx80 b STATUS_PARAM)
 442 {
 443     return islessequal(a, b);
 444 }
 445 INLINE int floatx80_lt_quiet( floatx80 a, floatx80 b STATUS_PARAM)
 446 {
 447     return isless(a, b);
 448
 449 }
 450 INLINE int floatx80_unordered( floatx80 a, floatx80 b STATUS_PARAM)
 451 {
 452     return isunordered(a, b);
 453
 454 }
 455 int floatx80_compare( floatx80, floatx80 STATUS_PARAM );
 456 int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
 457 int floatx80_is_signaling_nan( floatx80 );
 458 int floatx80_is_nan( floatx80 );
 459
 460 INLINE floatx80 floatx80_abs(floatx80 a)
 461 {
 462     return fabsl(a);
 463 }
 464
 465 INLINE floatx80 floatx80_chs(floatx80 a)
 466 {
 467     return -a;
 468 }
 469
 470 INLINE floatx80 floatx80_is_infinity(floatx80 a)
 471 {
 472     return fpclassify(a) == FP_INFINITE;
 473 }
 474
 475 INLINE floatx80 floatx80_is_neg(floatx80 a)
 476 {
 477     floatx80u u;
 478     u.f = a;
 479     return u.i.high >> 15;
 480 }
 481
 482 INLINE floatx80 floatx80_is_zero(floatx80 a)
 483 {
 484     return fpclassify(a) == FP_ZERO;
 485 }
 486
 487 INLINE floatx80 floatx80_scalbn(floatx80 a, int n)
 488 {
 489     return scalbnl(a, n);
 490 }
 491
 492 #endif