libm/w_hypotf.c

   1 /* w_hypotf.c -- float version of w_hypot.c.
   2  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
   3  */
   4
   5 /*
   6  * ====================================================
   7  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   8  *
   9  * Developed at SunPro, a Sun Microsystems, Inc. business.
  10  * Permission to use, copy, modify, and distribute this
  11  * software is freely granted, provided that this notice
  12  * is preserved.
  13  * ====================================================
  14  */
  15
  16 /*
  17  * wrapper hypotf(x,y)
  18  */
  19
  20 #include <math.h>
  21 #include "math_private.h"
  22
  23 float
  24 hypotf(float x, float y)
  25 {
  26 #if defined(__UCLIBC_HAS_FENV__)
  27         float z = (float) __ieee754_hypot((double) x, (double) y);
  28         if(__builtin_expect(!isfinite(z), 0)
  29            && isfinite(x) && isfinite(y) && _LIB_VERSION != _IEEE_)
  30             /* hypot overflow */
  31             return __kernel_standard_f(x, y, 104);
  32
  33         return z;
  34 #else
  35         return (float) __ieee754_hypot((double) x, (double) y);
  36 #endif
  37 }