e_exp10.c 1.2 KB

123456789101112131415161718192021222324252627282930313233
  1. /* Copyright (C) 1998-2015 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, see
  14. <http://www.gnu.org/licenses/>. */
  15. #include "math.h"
  16. #include "math_private.h"
  17. #include <float.h>
  18. double __ieee754_exp10 (double arg)
  19. {
  20. if (isfinite (arg) && arg < DBL_MIN_10_EXP - DBL_DIG - 10)
  21. return DBL_MIN * DBL_MIN;
  22. else
  23. /* This is a very stupid and inprecise implementation. It'll get
  24. replaced sometime (soon?). */
  25. return __ieee754_exp (M_LN10 * arg);
  26. }
  27. strong_alias(__ieee754_exp10, exp10)
  28. libm_hidden_def(exp10)