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