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1.1 ! root 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
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