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