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