libm/w_coshf.c

   1 /* w_coshf.c -- float version of w_cosh.c.
   2  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
   3  * Optimizations by Ulrich Drepper <drepper@gmail.com>, 2011.
   4  */
   5
   6 /*
   7  * ====================================================
   8  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   9  *
  10  * Developed at SunPro, a Sun Microsystems, Inc. business.
  11  * Permission to use, copy, modify, and distribute this
  12  * software is freely granted, provided that this notice
  13  * is preserved.
  14  * ====================================================
  15  */
  16
  17 /*
  18  * wrapper coshf(x)
  19  */
  20
  21 #include <math.h>
  22 #include "math_private.h"
  23
  24 float
  25 coshf (float x)
  26 {
  27 #if defined(__UCLIBC_HAS_FENV__)
  28         float z = (float) __ieee754_cosh ((double) x);
  29         if (__builtin_expect (!isfinite (z), 0) && isfinite (x)
  30             && _LIB_VERSION != _IEEE_)
  31                 return __kernel_standard_f (x, x, 105); /* cosh overflow */
  32
  33         return z;
  34 #else
  35         return (float) __ieee754_cosh ((double) x);
  36 #endif
  37 }