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/*
* ====================================================
* 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
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"
#ifdef _NEED_FLOAT64
__float64
nearbyint64(__float64 x)
{
if (isnan(x)) return x + x;
#if defined(FE_INEXACT) && !defined(PICOLIBC_DOUBLE_NOEXECPT)
fenv_t env;
fegetenv(&env);
#endif
x = rint64(x);
#if defined(FE_INEXACT) && !defined(PICOLIBC_DOUBLE_NOEXECPT)
fesetenv(&env);
#endif
return x;
}
_MATH_ALIAS_d_d(nearbyint)
#endif /* _NEED_FLOAT64 */
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