micropython/lib/libm_dbl/nearbyint.c

21 wiersze
334 B
C

//#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;
}