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65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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/*
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FUNCTION
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<<nearbyint>>, <<nearbyintf>>--round to integer
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INDEX
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nearbyint
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INDEX
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nearbyintf
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ANSI_SYNOPSIS
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#include <math.h>
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double nearbyint(double <[x]>);
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float nearbyintf(float <[x]>);
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DESCRIPTION
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The <<nearbyint>> functions round their argument to an integer value in
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floating-point format, using the current rounding direction and
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(supposedly) without raising the "inexact" floating-point exception.
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See the <<rint>> functions for the same function with the "inexact"
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floating-point exception being raised when appropriate.
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BUGS
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Newlib does not support the floating-point exception model, so that
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the floating-point exception control is not present and thereby what may
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be seen will be compiler and hardware dependent in this regard.
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The Newlib <<nearbyint>> functions are identical to the <<rint>>
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functions with respect to the floating-point exception behavior, and
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will cause the "inexact" exception to be raised for most targets.
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RETURNS
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<[x]> rounded to an integral value, using the current rounding direction.
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PORTABILITY
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ANSI C, POSIX
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SEEALSO
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<<rint>>, <<round>>
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*/
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#include <math.h>
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#include "fdlibm.h"
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#ifndef _DOUBLE_IS_32BITS
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#ifdef __STDC__
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double nearbyint(double x)
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#else
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double nearbyint(x)
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double x;
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#endif
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{
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return rint(x);
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}
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#endif /* _DOUBLE_IS_32BITS */
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