w_hypotl.c 1.1 KB

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  1. /* w_hypotl.c -- long double version of w_hypot.c.
  2. * Conversion to long double by Ulrich Drepper,
  3. * Cygnus Support, drepper@cygnus.com.
  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. * wrapper hypotl(x,y)
  17. */
  18. #include <math.h>
  19. #include "math_private.h"
  20. #if !defined __NO_LONG_DOUBLE_MATH
  21. long double
  22. hypotl(long double x, long double y)
  23. {
  24. # if __UCLIBC_HAS_FENV__
  25. long double z;
  26. z = (long double) __ieee754_hypot((double) x, (double) y);
  27. if(__builtin_expect(!isfinite(z), 0)
  28. && isfinite(x) && isfinite(y) && _LIB_VERSION != _IEEE_)
  29. return __kernel_standard_l(x, y, 204); /* hypot overflow */
  30. return z;
  31. # else
  32. return (long double) __ieee754_hypot((double) x, (double) y);
  33. # endif /* __UCLIBC_HAS_FENV__ */
  34. }
  35. #endif /* __NO_LONG_DOUBLE_MATH */