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 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_scalbn(float32 a, int n)
 262 {
 263     return scalbnf(a, n);
 264 }
 265
 266 /*----------------------------------------------------------------------------
 267 | Software IEC/IEEE double-precision conversion routines.
 268 *----------------------------------------------------------------------------*/
 269 int float64_to_int32( float64 STATUS_PARAM );
 270 int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
 271 unsigned int float64_to_uint32( float64 STATUS_PARAM );
 272 unsigned int float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
 273 int64_t float64_to_int64( float64 STATUS_PARAM );
 274 int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
 275 uint64_t float64_to_uint64( float64 STATUS_PARAM );
 276 uint64_t float64_to_uint64_round_to_zero( float64 STATUS_PARAM );
 277 float32 float64_to_float32( float64 STATUS_PARAM );
 278 #ifdef FLOATX80
 279 floatx80 float64_to_floatx80( float64 STATUS_PARAM );
 280 #endif
 281 #ifdef FLOAT128
 282 float128 float64_to_float128( float64 STATUS_PARAM );
 283 #endif
 284
 285 /*----------------------------------------------------------------------------
 286 | Software IEC/IEEE double-precision operations.
 287 *----------------------------------------------------------------------------*/
 288 float64 float64_round_to_int( float64 STATUS_PARAM );
 289 float64 float64_trunc_to_int( float64 STATUS_PARAM );
 290 INLINE float64 float64_add( float64 a, float64 b STATUS_PARAM)
 291 {
 292     return a + b;
 293 }
 294 INLINE float64 float64_sub( float64 a, float64 b STATUS_PARAM)
 295 {
 296     return a - b;
 297 }
 298 INLINE float64 float64_mul( float64 a, float64 b STATUS_PARAM)
 299 {
 300     return a * b;
 301 }
 302 INLINE float64 float64_div( float64 a, float64 b STATUS_PARAM)
 303 {
 304     return a / b;
 305 }
 306 float64 float64_rem( float64, float64 STATUS_PARAM );
 307 float64 float64_sqrt( float64 STATUS_PARAM );
 308 INLINE int float64_eq( float64 a, float64 b STATUS_PARAM)
 309 {
 310     return a == b;
 311 }
 312 INLINE int float64_le( float64 a, float64 b STATUS_PARAM)
 313 {
 314     return a <= b;
 315 }
 316 INLINE int float64_lt( float64 a, float64 b STATUS_PARAM)
 317 {
 318     return a < b;
 319 }
 320 INLINE int float64_eq_signaling( float64 a, float64 b STATUS_PARAM)
 321 {
 322     return a <= b && a >= b;
 323 }
 324 INLINE int float64_le_quiet( float64 a, float64 b STATUS_PARAM)
 325 {
 326     return islessequal(a, b);
 327 }
 328 INLINE int float64_lt_quiet( float64 a, float64 b STATUS_PARAM)
 329 {
 330     return isless(a, b);
 331
 332 }
 333 INLINE int float64_unordered( float64 a, float64 b STATUS_PARAM)
 334 {
 335     return isunordered(a, b);
 336
 337 }
 338 int float64_compare( float64, float64 STATUS_PARAM );
 339 int float64_compare_quiet( float64, float64 STATUS_PARAM );
 340 int float64_is_signaling_nan( float64 );
 341 int float64_is_nan( float64 );
 342
 343 INLINE float64 float64_abs(float64 a)
 344 {
 345     return fabs(a);
 346 }
 347
 348 INLINE float64 float64_chs(float64 a)
 349 {
 350     return -a;
 351 }
 352
 353 INLINE float64 float64_scalbn(float64 a, int n)
 354 {
 355     return scalbn(a, n);
 356 }
 357
 358 #ifdef FLOATX80
 359
 360 /*----------------------------------------------------------------------------
 361 | Software IEC/IEEE extended double-precision conversion routines.
 362 *----------------------------------------------------------------------------*/
 363 int floatx80_to_int32( floatx80 STATUS_PARAM );
 364 int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
 365 int64_t floatx80_to_int64( floatx80 STATUS_PARAM);
 366 int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM);
 367 float32 floatx80_to_float32( floatx80 STATUS_PARAM );
 368 float64 floatx80_to_float64( floatx80 STATUS_PARAM );
 369 #ifdef FLOAT128
 370 float128 floatx80_to_float128( floatx80 STATUS_PARAM );
 371 #endif
 372
 373 /*----------------------------------------------------------------------------
 374 | Software IEC/IEEE extended double-precision operations.
 375 *----------------------------------------------------------------------------*/
 376 floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
 377 INLINE floatx80 floatx80_add( floatx80 a, floatx80 b STATUS_PARAM)
 378 {
 379     return a + b;
 380 }
 381 INLINE floatx80 floatx80_sub( floatx80 a, floatx80 b STATUS_PARAM)
 382 {
 383     return a - b;
 384 }
 385 INLINE floatx80 floatx80_mul( floatx80 a, floatx80 b STATUS_PARAM)
 386 {
 387     return a * b;
 388 }
 389 INLINE floatx80 floatx80_div( floatx80 a, floatx80 b STATUS_PARAM)
 390 {
 391     return a / b;
 392 }
 393 floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
 394 floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
 395 INLINE int floatx80_eq( floatx80 a, floatx80 b STATUS_PARAM)
 396 {
 397     return a == b;
 398 }
 399 INLINE int floatx80_le( floatx80 a, floatx80 b STATUS_PARAM)
 400 {
 401     return a <= b;
 402 }
 403 INLINE int floatx80_lt( floatx80 a, floatx80 b STATUS_PARAM)
 404 {
 405     return a < b;
 406 }
 407 INLINE int floatx80_eq_signaling( floatx80 a, floatx80 b STATUS_PARAM)
 408 {
 409     return a <= b && a >= b;
 410 }
 411 INLINE int floatx80_le_quiet( floatx80 a, floatx80 b STATUS_PARAM)
 412 {
 413     return islessequal(a, b);
 414 }
 415 INLINE int floatx80_lt_quiet( floatx80 a, floatx80 b STATUS_PARAM)
 416 {
 417     return isless(a, b);
 418
 419 }
 420 INLINE int floatx80_unordered( floatx80 a, floatx80 b STATUS_PARAM)
 421 {
 422     return isunordered(a, b);
 423
 424 }
 425 int floatx80_compare( floatx80, floatx80 STATUS_PARAM );
 426 int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
 427 int floatx80_is_signaling_nan( floatx80 );
 428 int floatx80_is_nan( floatx80 );
 429
 430 INLINE floatx80 floatx80_abs(floatx80 a)
 431 {
 432     return fabsl(a);
 433 }
 434
 435 INLINE floatx80 floatx80_chs(floatx80 a)
 436 {
 437     return -a;
 438 }
 439
 440 INLINE floatx80 floatx80_scalbn(floatx80 a, int n)
 441 {
 442     return scalbnl(a, n);
 443 }
 444
 445 #endif