src/math/nearbyint.c

   1 #include <fenv.h>
   2 #include <math.h>
   3
   4 /* nearbyint is the same as rint, but it must not raise the inexact exception */
   5
   6 double nearbyint(double x)
   7 {
   8 #ifdef FE_INEXACT
   9         #pragma STDC FENV_ACCESS ON
  10         int e;
  11
  12         e = fetestexcept(FE_INEXACT);
  13 #endif
  14         x = rint(x);
  15 #ifdef FE_INEXACT
  16         if (!e)
  17                 feclearexcept(FE_INEXACT);
  18 #endif
  19         return x;
  20 }