fpu/softfloat-native.h

   1 /* Native implementation of soft float functions */
   2 #include <math.h>
   3
   4 #if (defined(_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(_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     signed char float_rounding_mode;
 144 #ifdef FLOATX80
 145     signed char 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
 250 INLINE float32 float32_abs(float32 a)
 251 {
 252     return fabsf(a);
 253 }
 254
 255 INLINE float32 float32_chs(float32 a)
 256 {
 257     return -a;
 258 }
 259
 260 INLINE float32 float32_scalbn(float32 a, int n)
 261 {
 262     return scalbnf(a, n);
 263 }
 264
 265 /*----------------------------------------------------------------------------
 266 | Software IEC/IEEE double-precision conversion routines.
 267 *----------------------------------------------------------------------------*/
 268 int float64_to_int32( float64 STATUS_PARAM );
 269 int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
 270 unsigned int float64_to_uint32( float64 STATUS_PARAM );
 271 unsigned int float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
 272 int64_t float64_to_int64( float64 STATUS_PARAM );
 273 int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
 274 uint64_t float64_to_uint64( float64 STATUS_PARAM );
 275 uint64_t float64_to_uint64_round_to_zero( float64 STATUS_PARAM );
 276 float32 float64_to_float32( float64 STATUS_PARAM );
 277 #ifdef FLOATX80
 278 floatx80 float64_to_floatx80( float64 STATUS_PARAM );
 279 #endif
 280 #ifdef FLOAT128
 281 float128 float64_to_float128( float64 STATUS_PARAM );
 282 #endif
 283
 284 /*----------------------------------------------------------------------------
 285 | Software IEC/IEEE double-precision operations.
 286 *----------------------------------------------------------------------------*/
 287 float64 float64_round_to_int( float64 STATUS_PARAM );
 288 float64 float64_trunc_to_int( float64 STATUS_PARAM );
 289 INLINE float64 float64_add( float64 a, float64 b STATUS_PARAM)
 290 {
 291     return a + b;
 292 }
 293 INLINE float64 float64_sub( float64 a, float64 b STATUS_PARAM)
 294 {
 295     return a - b;
 296 }
 297 INLINE float64 float64_mul( float64 a, float64 b STATUS_PARAM)
 298 {
 299     return a * b;
 300 }
 301 INLINE float64 float64_div( float64 a, float64 b STATUS_PARAM)
 302 {
 303     return a / b;
 304 }
 305 float64 float64_rem( float64, float64 STATUS_PARAM );
 306 float64 float64_sqrt( float64 STATUS_PARAM );
 307 INLINE int float64_eq( float64 a, float64 b STATUS_PARAM)
 308 {
 309     return a == b;
 310 }
 311 INLINE int float64_le( float64 a, float64 b STATUS_PARAM)
 312 {
 313     return a <= b;
 314 }
 315 INLINE int float64_lt( float64 a, float64 b STATUS_PARAM)
 316 {
 317     return a < b;
 318 }
 319 INLINE int float64_eq_signaling( float64 a, float64 b STATUS_PARAM)
 320 {
 321     return a <= b && a >= b;
 322 }
 323 INLINE int float64_le_quiet( float64 a, float64 b STATUS_PARAM)
 324 {
 325     return islessequal(a, b);
 326 }
 327 INLINE int float64_lt_quiet( float64 a, float64 b STATUS_PARAM)
 328 {
 329     return isless(a, b);
 330
 331 }
 332 INLINE int float64_unordered( float64 a, float64 b STATUS_PARAM)
 333 {
 334     return isunordered(a, b);
 335
 336 }
 337 int float64_compare( float64, float64 STATUS_PARAM );
 338 int float64_compare_quiet( float64, float64 STATUS_PARAM );
 339 int float64_is_signaling_nan( float64 );
 340 int float64_is_nan( float64 );
 341
 342 INLINE float64 float64_abs(float64 a)
 343 {
 344     return fabs(a);
 345 }
 346
 347 INLINE float64 float64_chs(float64 a)
 348 {
 349     return -a;
 350 }
 351
 352 INLINE float64 float64_scalbn(float64 a, int n)
 353 {
 354     return scalbn(a, n);
 355 }
 356
 357 #ifdef FLOATX80
 358
 359 /*----------------------------------------------------------------------------
 360 | Software IEC/IEEE extended double-precision conversion routines.
 361 *----------------------------------------------------------------------------*/
 362 int floatx80_to_int32( floatx80 STATUS_PARAM );
 363 int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
 364 int64_t floatx80_to_int64( floatx80 STATUS_PARAM);
 365 int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM);
 366 float32 floatx80_to_float32( floatx80 STATUS_PARAM );
 367 float64 floatx80_to_float64( floatx80 STATUS_PARAM );
 368 #ifdef FLOAT128
 369 float128 floatx80_to_float128( floatx80 STATUS_PARAM );
 370 #endif
 371
 372 /*----------------------------------------------------------------------------
 373 | Software IEC/IEEE extended double-precision operations.
 374 *----------------------------------------------------------------------------*/
 375 floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
 376 INLINE floatx80 floatx80_add( floatx80 a, floatx80 b STATUS_PARAM)
 377 {
 378     return a + b;
 379 }
 380 INLINE floatx80 floatx80_sub( floatx80 a, floatx80 b STATUS_PARAM)
 381 {
 382     return a - b;
 383 }
 384 INLINE floatx80 floatx80_mul( floatx80 a, floatx80 b STATUS_PARAM)
 385 {
 386     return a * b;
 387 }
 388 INLINE floatx80 floatx80_div( floatx80 a, floatx80 b STATUS_PARAM)
 389 {
 390     return a / b;
 391 }
 392 floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
 393 floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
 394 INLINE int floatx80_eq( floatx80 a, floatx80 b STATUS_PARAM)
 395 {
 396     return a == b;
 397 }
 398 INLINE int floatx80_le( floatx80 a, floatx80 b STATUS_PARAM)
 399 {
 400     return a <= b;
 401 }
 402 INLINE int floatx80_lt( floatx80 a, floatx80 b STATUS_PARAM)
 403 {
 404     return a < b;
 405 }
 406 INLINE int floatx80_eq_signaling( floatx80 a, floatx80 b STATUS_PARAM)
 407 {
 408     return a <= b && a >= b;
 409 }
 410 INLINE int floatx80_le_quiet( floatx80 a, floatx80 b STATUS_PARAM)
 411 {
 412     return islessequal(a, b);
 413 }
 414 INLINE int floatx80_lt_quiet( floatx80 a, floatx80 b STATUS_PARAM)
 415 {
 416     return isless(a, b);
 417
 418 }
 419 INLINE int floatx80_unordered( floatx80 a, floatx80 b STATUS_PARAM)
 420 {
 421     return isunordered(a, b);
 422
 423 }
 424 int floatx80_compare( floatx80, floatx80 STATUS_PARAM );
 425 int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
 426 int floatx80_is_signaling_nan( floatx80 );
 427
 428 INLINE floatx80 floatx80_abs(floatx80 a)
 429 {
 430     return fabsl(a);
 431 }
 432
 433 INLINE floatx80 floatx80_chs(floatx80 a)
 434 {
 435     return -a;
 436 }
 437
 438 INLINE floatx80 floatx80_scalbn(floatx80 a, int n)
 439 {
 440     return scalbnl(a, n);
 441 }
 442
 443 #endif