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| 2 | /* @(#)s_rint.c 5.1 93/09/24 */
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| 3 | /*
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| 4 | * ====================================================
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| 5 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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| 6 | *
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| 7 | * Developed at SunPro, a Sun Microsystems, Inc. business.
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| 8 | * Permission to use, copy, modify, and distribute this
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| 9 | * software is freely granted, provided that this notice
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| 10 | * is preserved.
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| 11 | * ====================================================
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| 12 | */
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| 13 |
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| 14 | /*
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| 15 | * rint(x)
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| 16 | * Return x rounded to integral value according to the prevailing
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| 17 | * rounding mode.
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| 18 | * Method:
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| 19 | * Using floating addition.
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| 20 | * Exception:
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| 21 | * Inexact flag raised if x not equal to rint(x).
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| 22 | */
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| 23 |
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| 24 | #include "fdlibm.h"
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| 25 |
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| 26 | #ifndef _DOUBLE_IS_32BITS
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| 27 |
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| 28 | #ifdef __STDC__
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| 29 | static const double
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| 30 | #else
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| 31 | static double
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| 32 | #endif
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| 33 | TWO52[2]={
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| 34 | 4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */
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| 35 | -4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
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| 36 | };
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| 37 |
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| 38 | #ifdef __STDC__
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| 39 | double rint(double x)
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