libm/s_fdim.c

   1 /* Copyright (C) 2002 by  Red Hat, Incorporated. All rights reserved.
   2  *
   3  * Permission to use, copy, modify, and distribute this software
   4  * is freely granted, provided that this notice is preserved.
   5  */
   6
   7 #include "math.h"
   8 #include "math_private.h"
   9
  10 double fdim(double x, double y)
  11 {
  12   int c = __fpclassify(x);
  13   if (c == FP_NAN || c == FP_INFINITE)
  14     return HUGE_VAL;
  15
  16   return x > y ? x - y : 0.0;
  17 }
  18 libm_hidden_def(fdim)