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1.1 ! root 1: /* Native implementation of soft float functions. Only a single status ! 2: context is supported */ ! 3: #include "softfloat.h" ! 4: #include <math.h> ! 5: ! 6: void set_float_rounding_mode(int val STATUS_PARAM) ! 7: { ! 8: STATUS(float_rounding_mode) = val; ! 9: #if defined(_BSD) && !defined(__APPLE__) ! 10: fpsetround(val); ! 11: #elif defined(__arm__) ! 12: /* nothing to do */ ! 13: #else ! 14: fesetround(val); ! 15: #endif ! 16: } ! 17: ! 18: #ifdef FLOATX80 ! 19: void set_floatx80_rounding_precision(int val STATUS_PARAM) ! 20: { ! 21: STATUS(floatx80_rounding_precision) = val; ! 22: } ! 23: #endif ! 24: ! 25: #if defined(_BSD) ! 26: #define lrint(d) ((int32_t)rint(d)) ! 27: #define llrint(d) ((int64_t)rint(d)) ! 28: #endif ! 29: ! 30: #if defined(__powerpc__) ! 31: ! 32: /* correct (but slow) PowerPC rint() (glibc version is incorrect) */ ! 33: double qemu_rint(double x) ! 34: { ! 35: double y = 4503599627370496.0; ! 36: if (fabs(x) >= y) ! 37: return x; ! 38: if (x < 0) ! 39: y = -y; ! 40: y = (x + y) - y; ! 41: if (y == 0.0) ! 42: y = copysign(y, x); ! 43: return y; ! 44: } ! 45: ! 46: #define rint qemu_rint ! 47: #endif ! 48: ! 49: /*---------------------------------------------------------------------------- ! 50: | Software IEC/IEEE integer-to-floating-point conversion routines. ! 51: *----------------------------------------------------------------------------*/ ! 52: float32 int32_to_float32(int v STATUS_PARAM) ! 53: { ! 54: return (float32)v; ! 55: } ! 56: ! 57: float64 int32_to_float64(int v STATUS_PARAM) ! 58: { ! 59: return (float64)v; ! 60: } ! 61: ! 62: #ifdef FLOATX80 ! 63: floatx80 int32_to_floatx80(int v STATUS_PARAM) ! 64: { ! 65: return (floatx80)v; ! 66: } ! 67: #endif ! 68: float32 int64_to_float32( int64_t v STATUS_PARAM) ! 69: { ! 70: return (float32)v; ! 71: } ! 72: float64 int64_to_float64( int64_t v STATUS_PARAM) ! 73: { ! 74: return (float64)v; ! 75: } ! 76: #ifdef FLOATX80 ! 77: floatx80 int64_to_floatx80( int64_t v STATUS_PARAM) ! 78: { ! 79: return (floatx80)v; ! 80: } ! 81: #endif ! 82: ! 83: /*---------------------------------------------------------------------------- ! 84: | Software IEC/IEEE single-precision conversion routines. ! 85: *----------------------------------------------------------------------------*/ ! 86: int float32_to_int32( float32 a STATUS_PARAM) ! 87: { ! 88: return lrintf(a); ! 89: } ! 90: int float32_to_int32_round_to_zero( float32 a STATUS_PARAM) ! 91: { ! 92: return (int)a; ! 93: } ! 94: int64_t float32_to_int64( float32 a STATUS_PARAM) ! 95: { ! 96: return llrintf(a); ! 97: } ! 98: ! 99: int64_t float32_to_int64_round_to_zero( float32 a STATUS_PARAM) ! 100: { ! 101: return (int64_t)a; ! 102: } ! 103: ! 104: float64 float32_to_float64( float32 a STATUS_PARAM) ! 105: { ! 106: return a; ! 107: } ! 108: #ifdef FLOATX80 ! 109: floatx80 float32_to_floatx80( float32 a STATUS_PARAM) ! 110: { ! 111: return a; ! 112: } ! 113: #endif ! 114: ! 115: /*---------------------------------------------------------------------------- ! 116: | Software IEC/IEEE single-precision operations. ! 117: *----------------------------------------------------------------------------*/ ! 118: float32 float32_round_to_int( float32 a STATUS_PARAM) ! 119: { ! 120: return rintf(a); ! 121: } ! 122: ! 123: float32 float32_rem( float32 a, float32 b STATUS_PARAM) ! 124: { ! 125: return remainderf(a, b); ! 126: } ! 127: ! 128: float32 float32_sqrt( float32 a STATUS_PARAM) ! 129: { ! 130: return sqrtf(a); ! 131: } ! 132: char float32_compare( float32 a, float32 b STATUS_PARAM ) ! 133: { ! 134: if (a < b) { ! 135: return -1; ! 136: } else if (a == b) { ! 137: return 0; ! 138: } else if (a > b) { ! 139: return 1; ! 140: } else { ! 141: return 2; ! 142: } ! 143: } ! 144: char float32_compare_quiet( float32 a, float32 b STATUS_PARAM ) ! 145: { ! 146: if (isless(a, b)) { ! 147: return -1; ! 148: } else if (a == b) { ! 149: return 0; ! 150: } else if (isgreater(a, b)) { ! 151: return 1; ! 152: } else { ! 153: return 2; ! 154: } ! 155: } ! 156: char float32_is_signaling_nan( float32 a1) ! 157: { ! 158: float32u u; ! 159: uint32_t a; ! 160: u.f = a1; ! 161: a = u.i; ! 162: return ( ( ( a>>22 ) & 0x1FF ) == 0x1FE ) && ( a & 0x003FFFFF ); ! 163: } ! 164: ! 165: /*---------------------------------------------------------------------------- ! 166: | Software IEC/IEEE double-precision conversion routines. ! 167: *----------------------------------------------------------------------------*/ ! 168: int float64_to_int32( float64 a STATUS_PARAM) ! 169: { ! 170: return lrint(a); ! 171: } ! 172: int float64_to_int32_round_to_zero( float64 a STATUS_PARAM) ! 173: { ! 174: return (int)a; ! 175: } ! 176: int64_t float64_to_int64( float64 a STATUS_PARAM) ! 177: { ! 178: return llrint(a); ! 179: } ! 180: int64_t float64_to_int64_round_to_zero( float64 a STATUS_PARAM) ! 181: { ! 182: return (int64_t)a; ! 183: } ! 184: float32 float64_to_float32( float64 a STATUS_PARAM) ! 185: { ! 186: return a; ! 187: } ! 188: #ifdef FLOATX80 ! 189: floatx80 float64_to_floatx80( float64 a STATUS_PARAM) ! 190: { ! 191: return a; ! 192: } ! 193: #endif ! 194: #ifdef FLOAT128 ! 195: float128 float64_to_float128( float64 a STATUS_PARAM) ! 196: { ! 197: return a; ! 198: } ! 199: #endif ! 200: ! 201: /*---------------------------------------------------------------------------- ! 202: | Software IEC/IEEE double-precision operations. ! 203: *----------------------------------------------------------------------------*/ ! 204: float64 float64_round_to_int( float64 a STATUS_PARAM ) ! 205: { ! 206: #if defined(__arm__) ! 207: switch(STATUS(float_rounding_mode)) { ! 208: default: ! 209: case float_round_nearest_even: ! 210: asm("rndd %0, %1" : "=f" (a) : "f"(a)); ! 211: break; ! 212: case float_round_down: ! 213: asm("rnddm %0, %1" : "=f" (a) : "f"(a)); ! 214: break; ! 215: case float_round_up: ! 216: asm("rnddp %0, %1" : "=f" (a) : "f"(a)); ! 217: break; ! 218: case float_round_to_zero: ! 219: asm("rnddz %0, %1" : "=f" (a) : "f"(a)); ! 220: break; ! 221: } ! 222: #else ! 223: return rint(a); ! 224: #endif ! 225: } ! 226: ! 227: float64 float64_rem( float64 a, float64 b STATUS_PARAM) ! 228: { ! 229: return remainder(a, b); ! 230: } ! 231: ! 232: float64 float64_sqrt( float64 a STATUS_PARAM) ! 233: { ! 234: return sqrt(a); ! 235: } ! 236: char float64_compare( float64 a, float64 b STATUS_PARAM ) ! 237: { ! 238: if (a < b) { ! 239: return -1; ! 240: } else if (a == b) { ! 241: return 0; ! 242: } else if (a > b) { ! 243: return 1; ! 244: } else { ! 245: return 2; ! 246: } ! 247: } ! 248: char float64_compare_quiet( float64 a, float64 b STATUS_PARAM ) ! 249: { ! 250: if (isless(a, b)) { ! 251: return -1; ! 252: } else if (a == b) { ! 253: return 0; ! 254: } else if (isgreater(a, b)) { ! 255: return 1; ! 256: } else { ! 257: return 2; ! 258: } ! 259: } ! 260: char float64_is_signaling_nan( float64 a1) ! 261: { ! 262: float64u u; ! 263: uint64_t a; ! 264: u.f = a1; ! 265: a = u.i; ! 266: return ! 267: ( ( ( a>>51 ) & 0xFFF ) == 0xFFE ) ! 268: && ( a & LIT64( 0x0007FFFFFFFFFFFF ) ); ! 269: ! 270: } ! 271: ! 272: #ifdef FLOATX80 ! 273: ! 274: /*---------------------------------------------------------------------------- ! 275: | Software IEC/IEEE extended double-precision conversion routines. ! 276: *----------------------------------------------------------------------------*/ ! 277: int floatx80_to_int32( floatx80 a STATUS_PARAM) ! 278: { ! 279: return lrintl(a); ! 280: } ! 281: int floatx80_to_int32_round_to_zero( floatx80 a STATUS_PARAM) ! 282: { ! 283: return (int)a; ! 284: } ! 285: int64_t floatx80_to_int64( floatx80 a STATUS_PARAM) ! 286: { ! 287: return llrintl(a); ! 288: } ! 289: int64_t floatx80_to_int64_round_to_zero( floatx80 a STATUS_PARAM) ! 290: { ! 291: return (int64_t)a; ! 292: } ! 293: float32 floatx80_to_float32( floatx80 a STATUS_PARAM) ! 294: { ! 295: return a; ! 296: } ! 297: float64 floatx80_to_float64( floatx80 a STATUS_PARAM) ! 298: { ! 299: return a; ! 300: } ! 301: ! 302: /*---------------------------------------------------------------------------- ! 303: | Software IEC/IEEE extended double-precision operations. ! 304: *----------------------------------------------------------------------------*/ ! 305: floatx80 floatx80_round_to_int( floatx80 a STATUS_PARAM) ! 306: { ! 307: return rintl(a); ! 308: } ! 309: floatx80 floatx80_rem( floatx80 a, floatx80 b STATUS_PARAM) ! 310: { ! 311: return remainderl(a, b); ! 312: } ! 313: floatx80 floatx80_sqrt( floatx80 a STATUS_PARAM) ! 314: { ! 315: return sqrtl(a); ! 316: } ! 317: char floatx80_compare( floatx80 a, floatx80 b STATUS_PARAM ) ! 318: { ! 319: if (a < b) { ! 320: return -1; ! 321: } else if (a == b) { ! 322: return 0; ! 323: } else if (a > b) { ! 324: return 1; ! 325: } else { ! 326: return 2; ! 327: } ! 328: } ! 329: char floatx80_compare_quiet( floatx80 a, floatx80 b STATUS_PARAM ) ! 330: { ! 331: if (isless(a, b)) { ! 332: return -1; ! 333: } else if (a == b) { ! 334: return 0; ! 335: } else if (isgreater(a, b)) { ! 336: return 1; ! 337: } else { ! 338: return 2; ! 339: } ! 340: } ! 341: char floatx80_is_signaling_nan( floatx80 a1) ! 342: { ! 343: floatx80u u; ! 344: u.f = a1; ! 345: return ( ( u.i.high & 0x7FFF ) == 0x7FFF ) && (bits64) ( u.i.low<<1 ); ! 346: } ! 347: ! 348: #endif
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