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