nearbyint.c\math\src - musl - musl - an implementation of the standard library for Linux-based systems

#include <fenv.h>
#include <math.h>
/* nearbyint is the same as rint, but it must not raise the inexact exception */
double nearbyint(double x)
{
#ifdef FE_INEXACT
	#pragma STDC FENV_ACCESS ON
	int e;
	e = fetestexcept(FE_INEXACT);
#endif
	x = rint(x);
#ifdef FE_INEXACT
	if (!e)
		feclearexcept(FE_INEXACT);
#endif
	return x;
}