summaryrefslogblamecommitdiff
path: root/src/math/nearbyint.c
blob: f4e8aac4f0118d7d48d1d6a8e4af0fec048ee62a (plain) (tree)
1
2
3
4
5
6
7
8
9
                 
                 
 
                                                                                
 


                          
                                   
              
 

                                     
                    



                                          

                 
#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;
}