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  1. // -*- C++ -*- C math library.
  2.  
  3. // Copyright (C) 2000 Free Software Foundation, Inc.
  4. //
  5. // This file is part of the GNU ISO C++ Library.  This library is free
  6. // software; you can redistribute it and/or modify it under the
  7. // terms of the GNU General Public License as published by the
  8. // Free Software Foundation; either version 2, or (at your option)
  9. // any later version.
  10.  
  11. // This library is distributed in the hope that it will be useful,
  12. // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14. // GNU General Public License for more details.
  15.  
  16. // You should have received a copy of the GNU General Public License along
  17. // with this library; see the file COPYING.  If not, write to the Free
  18. // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19. // USA.
  20.  
  21. // As a special exception, you may use this file as part of a free software
  22. // library without restriction.  Specifically, if other files instantiate
  23. // templates or use macros or inline functions from this file, or you compile
  24. // this file and link it with other files to produce an executable, this
  25. // file does not by itself cause the resulting executable to be covered by
  26. // the GNU General Public License.  This exception does not however
  27. // invalidate any other reasons why the executable file might be covered by
  28. // the GNU General Public License.
  29.  
  30. // This file was written by Gabriel Dos Reis <gdr@codesourcery.com>
  31.  
  32. #ifndef _CPP_BITS_CMATH_TCC
  33. #define _CPP_BITS_CMATH_TCC 1
  34.  
  35. namespace std
  36. {
  37.   export template<typename _Tp>
  38.     _Tp
  39.     __cmath_power(_Tp __x, unsigned int __n)
  40.     {
  41.       _Tp __y = __n % 2 ? __x : 1;
  42.  
  43.       while (__n >>= 1)
  44.         {
  45.           __x = __x * __x;
  46.           if (__n % 2)
  47.             __y = __y * __x;
  48.         }
  49.  
  50.       return __y;
  51.     }
  52. }
  53.  
  54. #endif
  55.