src/math/fmaxl.c

   1 #include <math.h>
   2 #include <float.h>
   3
   4 #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
   5 long double fmaxl(long double x, long double y)
   6 {
   7         return fmax(x, y);
   8 }
   9 #else
  10 long double fmaxl(long double x, long double y)
  11 {
  12         if (isnan(x))
  13                 return y;
  14         if (isnan(y))
  15                 return x;
  16         /* handle signed zeros, see C99 Annex F.9.9.2 */
  17         if (signbit(x) != signbit(y))
  18                 return signbit(x) ? y : x;
  19         return x < y ? y : x;
  20 }
  21 #endif