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