fpu/softfloat-native.h

   1 /* Native implementation of soft float functions */
   2 #include <math.h>
   3 #if defined(_BSD) && !defined(__APPLE__)
   4 #include <ieeefp.h>
   5 #else
   6 #include <fenv.h>
   7 #endif
   8
   9 typedef float float32;
  10 typedef double float64;
  11 #ifdef FLOATX80
  12 typedef long double floatx80;
  13 #endif
  14
  15 typedef union {
  16     float32 f;
  17     uint32_t i;
  18 } float32u;
  19 typedef union {
  20     float64 f;
  21     uint64_t i;
  22 } float64u;
  23 #ifdef FLOATX80
  24 typedef union {
  25     floatx80 f;
  26     struct {
  27         uint64_t low;
  28         uint16_t high;
  29     } i;
  30 } floatx80u;
  31 #endif
  32
  33 /*----------------------------------------------------------------------------
  34 | Software IEC/IEEE floating-point rounding mode.
  35 *----------------------------------------------------------------------------*/
  36 #if defined(_BSD) && !defined(__APPLE__)
  37 enum {
  38     float_round_nearest_even = FP_RN,
  39     float_round_down         = FE_RM,
  40     float_round_up           = FE_RP,
  41     float_round_to_zero      = FE_RZ
  42 };
  43 #elif defined(__arm__)
  44 enum {
  45     float_round_nearest_even = 0,
  46     float_round_down         = 1,
  47     float_round_up           = 2,
  48     float_round_to_zero      = 3
  49 };
  50 #else
  51 enum {
  52     float_round_nearest_even = FE_TONEAREST,
  53     float_round_down         = FE_DOWNWARD,
  54     float_round_up           = FE_UPWARD,
  55     float_round_to_zero      = FE_TOWARDZERO
  56 };
  57 #endif
  58
  59 typedef struct float_status {
  60     signed char float_rounding_mode;
  61 #ifdef FLOATX80
  62     signed char floatx80_rounding_precision;
  63 #endif
  64 } float_status;
  65
  66 void set_float_rounding_mode(int val STATUS_PARAM);
  67 #ifdef FLOATX80
  68 void set_floatx80_rounding_precision(int val STATUS_PARAM);
  69 #endif
  70
  71 /*----------------------------------------------------------------------------
  72 | Software IEC/IEEE integer-to-floating-point conversion routines.
  73 *----------------------------------------------------------------------------*/
  74 float32 int32_to_float32( int STATUS_PARAM);
  75 float64 int32_to_float64( int STATUS_PARAM);
  76 #ifdef FLOATX80
  77 floatx80 int32_to_floatx80( int STATUS_PARAM);
  78 #endif
  79 #ifdef FLOAT128
  80 float128 int32_to_float128( int STATUS_PARAM);
  81 #endif
  82 float32 int64_to_float32( int64_t STATUS_PARAM);
  83 float64 int64_to_float64( int64_t STATUS_PARAM);
  84 #ifdef FLOATX80
  85 floatx80 int64_to_floatx80( int64_t STATUS_PARAM);
  86 #endif
  87 #ifdef FLOAT128
  88 float128 int64_to_float128( int64_t STATUS_PARAM);
  89 #endif
  90
  91 /*----------------------------------------------------------------------------
  92 | Software IEC/IEEE single-precision conversion routines.
  93 *----------------------------------------------------------------------------*/
  94 int float32_to_int32( float32  STATUS_PARAM);
  95 int float32_to_int32_round_to_zero( float32  STATUS_PARAM);
  96 int64_t float32_to_int64( float32  STATUS_PARAM);
  97 int64_t float32_to_int64_round_to_zero( float32  STATUS_PARAM);
  98 float64 float32_to_float64( float32  STATUS_PARAM);
  99 #ifdef FLOATX80
 100 floatx80 float32_to_floatx80( float32  STATUS_PARAM);
 101 #endif
 102 #ifdef FLOAT128
 103 float128 float32_to_float128( float32  STATUS_PARAM);
 104 #endif
 105
 106 /*----------------------------------------------------------------------------
 107 | Software IEC/IEEE single-precision operations.
 108 *----------------------------------------------------------------------------*/
 109 float32 float32_round_to_int( float32  STATUS_PARAM);
 110 INLINE float32 float32_add( float32 a, float32 b STATUS_PARAM)
 111 {
 112     return a + b;
 113 }
 114 INLINE float32 float32_sub( float32 a, float32 b STATUS_PARAM)
 115 {
 116     return a - b;
 117 }
 118 INLINE float32 float32_mul( float32 a, float32 b STATUS_PARAM)
 119 {
 120     return a * b;
 121 }
 122 INLINE float32 float32_div( float32 a, float32 b STATUS_PARAM)
 123 {
 124     return a / b;
 125 }
 126 float32 float32_rem( float32, float32  STATUS_PARAM);
 127 float32 float32_sqrt( float32  STATUS_PARAM);
 128 INLINE char float32_eq( float32 a, float32 b STATUS_PARAM)
 129 {
 130     return a == b;
 131 }
 132 INLINE char float32_le( float32 a, float32 b STATUS_PARAM)
 133 {
 134     return a <= b;
 135 }
 136 INLINE char float32_lt( float32 a, float32 b STATUS_PARAM)
 137 {
 138     return a < b;
 139 }
 140 INLINE char float32_eq_signaling( float32 a, float32 b STATUS_PARAM)
 141 {
 142     return a <= b && a >= b;
 143 }
 144 INLINE char float32_le_quiet( float32 a, float32 b STATUS_PARAM)
 145 {
 146     return islessequal(a, b);
 147 }
 148 INLINE char float32_lt_quiet( float32 a, float32 b STATUS_PARAM)
 149 {
 150     return isless(a, b);
 151 }
 152 INLINE char float32_unordered( float32 a, float32 b STATUS_PARAM)
 153 {
 154     return isunordered(a, b);
 155
 156 }
 157 char float32_compare( float32, float32 STATUS_PARAM );
 158 char float32_compare_quiet( float32, float32 STATUS_PARAM );
 159 char float32_is_signaling_nan( float32 );
 160
 161 INLINE float32 float32_abs(float32 a)
 162 {
 163     return fabsf(a);
 164 }
 165
 166 INLINE float32 float32_chs(float32 a)
 167 {
 168     return -a;
 169 }
 170
 171 /*----------------------------------------------------------------------------
 172 | Software IEC/IEEE double-precision conversion routines.
 173 *----------------------------------------------------------------------------*/
 174 int float64_to_int32( float64 STATUS_PARAM );
 175 int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
 176 int64_t float64_to_int64( float64 STATUS_PARAM );
 177 int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
 178 float32 float64_to_float32( float64 STATUS_PARAM );
 179 #ifdef FLOATX80
 180 floatx80 float64_to_floatx80( float64 STATUS_PARAM );
 181 #endif
 182 #ifdef FLOAT128
 183 float128 float64_to_float128( float64 STATUS_PARAM );
 184 #endif
 185
 186 /*----------------------------------------------------------------------------
 187 | Software IEC/IEEE double-precision operations.
 188 *----------------------------------------------------------------------------*/
 189 float64 float64_round_to_int( float64 STATUS_PARAM );
 190 INLINE float64 float64_add( float64 a, float64 b STATUS_PARAM)
 191 {
 192     return a + b;
 193 }
 194 INLINE float64 float64_sub( float64 a, float64 b STATUS_PARAM)
 195 {
 196     return a - b;
 197 }
 198 INLINE float64 float64_mul( float64 a, float64 b STATUS_PARAM)
 199 {
 200     return a * b;
 201 }
 202 INLINE float64 float64_div( float64 a, float64 b STATUS_PARAM)
 203 {
 204     return a / b;
 205 }
 206 float64 float64_rem( float64, float64 STATUS_PARAM );
 207 float64 float64_sqrt( float64 STATUS_PARAM );
 208 INLINE char float64_eq( float64 a, float64 b STATUS_PARAM)
 209 {
 210     return a == b;
 211 }
 212 INLINE char float64_le( float64 a, float64 b STATUS_PARAM)
 213 {
 214     return a <= b;
 215 }
 216 INLINE char float64_lt( float64 a, float64 b STATUS_PARAM)
 217 {
 218     return a < b;
 219 }
 220 INLINE char float64_eq_signaling( float64 a, float64 b STATUS_PARAM)
 221 {
 222     return a <= b && a >= b;
 223 }
 224 INLINE char float64_le_quiet( float64 a, float64 b STATUS_PARAM)
 225 {
 226     return islessequal(a, b);
 227 }
 228 INLINE char float64_lt_quiet( float64 a, float64 b STATUS_PARAM)
 229 {
 230     return isless(a, b);
 231
 232 }
 233 INLINE char float64_unordered( float64 a, float64 b STATUS_PARAM)
 234 {
 235     return isunordered(a, b);
 236
 237 }
 238 char float64_compare( float64, float64 STATUS_PARAM );
 239 char float64_compare_quiet( float64, float64 STATUS_PARAM );
 240 char float64_is_signaling_nan( float64 );
 241
 242 INLINE float64 float64_abs(float64 a)
 243 {
 244     return fabs(a);
 245 }
 246
 247 INLINE float64 float64_chs(float64 a)
 248 {
 249     return -a;
 250 }
 251
 252 #ifdef FLOATX80
 253
 254 /*----------------------------------------------------------------------------
 255 | Software IEC/IEEE extended double-precision conversion routines.
 256 *----------------------------------------------------------------------------*/
 257 int floatx80_to_int32( floatx80 STATUS_PARAM );
 258 int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
 259 int64_t floatx80_to_int64( floatx80 STATUS_PARAM);
 260 int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM);
 261 float32 floatx80_to_float32( floatx80 STATUS_PARAM );
 262 float64 floatx80_to_float64( floatx80 STATUS_PARAM );
 263 #ifdef FLOAT128
 264 float128 floatx80_to_float128( floatx80 STATUS_PARAM );
 265 #endif
 266
 267 /*----------------------------------------------------------------------------
 268 | Software IEC/IEEE extended double-precision operations.
 269 *----------------------------------------------------------------------------*/
 270 floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
 271 INLINE floatx80 floatx80_add( floatx80 a, floatx80 b STATUS_PARAM)
 272 {
 273     return a + b;
 274 }
 275 INLINE floatx80 floatx80_sub( floatx80 a, floatx80 b STATUS_PARAM)
 276 {
 277     return a - b;
 278 }
 279 INLINE floatx80 floatx80_mul( floatx80 a, floatx80 b STATUS_PARAM)
 280 {
 281     return a * b;
 282 }
 283 INLINE floatx80 floatx80_div( floatx80 a, floatx80 b STATUS_PARAM)
 284 {
 285     return a / b;
 286 }
 287 floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
 288 floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
 289 INLINE char floatx80_eq( floatx80 a, floatx80 b STATUS_PARAM)
 290 {
 291     return a == b;
 292 }
 293 INLINE char floatx80_le( floatx80 a, floatx80 b STATUS_PARAM)
 294 {
 295     return a <= b;
 296 }
 297 INLINE char floatx80_lt( floatx80 a, floatx80 b STATUS_PARAM)
 298 {
 299     return a < b;
 300 }
 301 INLINE char floatx80_eq_signaling( floatx80 a, floatx80 b STATUS_PARAM)
 302 {
 303     return a <= b && a >= b;
 304 }
 305 INLINE char floatx80_le_quiet( floatx80 a, floatx80 b STATUS_PARAM)
 306 {
 307     return islessequal(a, b);
 308 }
 309 INLINE char floatx80_lt_quiet( floatx80 a, floatx80 b STATUS_PARAM)
 310 {
 311     return isless(a, b);
 312
 313 }
 314 INLINE char floatx80_unordered( floatx80 a, floatx80 b STATUS_PARAM)
 315 {
 316     return isunordered(a, b);
 317
 318 }
 319 char floatx80_compare( floatx80, floatx80 STATUS_PARAM );
 320 char floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
 321 char floatx80_is_signaling_nan( floatx80 );
 322
 323 INLINE floatx80 floatx80_abs(floatx80 a)
 324 {
 325     return fabsl(a);
 326 }
 327
 328 INLINE floatx80 floatx80_chs(floatx80 a)
 329 {
 330     return -a;
 331 }
 332 #endif