Rev 4872 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* lroundf adapted to be llroundf for Newlib, 2009 by Craig Howland. */ |
| 2 | /* |
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| 3 | * ==================================================== |
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| 4 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
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| 5 | * |
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| 6 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
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| 7 | * Permission to use, copy, modify, and distribute this |
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| 8 | * software is freely granted, provided that this notice |
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| 9 | * is preserved. |
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| 10 | * ==================================================== |
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| 11 | */ |
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| 12 | |||
| 13 | #include "fdlibm.h" |
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| 14 | |||
| 15 | long long int |
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| 16 | llroundf(float x) |
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| 17 | { |
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| 18 | __int32_t exponent_less_127; |
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| 19 | __uint32_t w; |
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| 20 | long long int result; |
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| 21 | __int32_t sign; |
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| 22 | |||
| 23 | GET_FLOAT_WORD (w, x); |
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| 24 | exponent_less_127 = ((w & 0x7f800000) >> 23) - 127; |
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| 25 | sign = (w & 0x80000000) != 0 ? -1 : 1; |
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| 26 | w &= 0x7fffff; |
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| 27 | w |= 0x800000; |
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| 28 | |||
| 29 | if (exponent_less_127 < (int)((8 * sizeof (long long int)) - 1)) |
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| 30 | { |
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| 31 | if (exponent_less_127 < 0) |
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| 32 | return exponent_less_127 < -1 ? 0 : sign; |
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| 33 | else if (exponent_less_127 >= 23) |
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| 34 | result = (long long int) w << (exponent_less_127 - 23); |
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| 35 | else |
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| 36 | { |
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| 37 | w += 0x400000 >> exponent_less_127; |
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| 38 | result = w >> (23 - exponent_less_127); |
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| 39 | } |
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| 40 | } |
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| 41 | else |
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| 42 | return (long long int) x; |
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| 43 | |||
| 44 | return sign * result; |
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| 45 | } |
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| 46 | |||
| 47 | #ifdef _DOUBLE_IS_32BITS |
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| 48 | |||
| 49 | long long int |
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| 50 | llround(double x) |
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| 51 | { |
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| 52 | return llroundf((float) x); |
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| 53 | } |
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| 54 | |||
| 55 | #endif /* defined(_DOUBLE_IS_32BITS) */ |