copysign.h 1.4 KB

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  1. //===----------------------------------------------------------------------===//
  2. //
  3. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  4. // See https://llvm.org/LICENSE.txt for license information.
  5. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  6. //
  7. //===----------------------------------------------------------------------===//
  8. #ifndef _LIBCPP___MATH_COPYSIGN_H
  9. #define _LIBCPP___MATH_COPYSIGN_H
  10. #include <__config>
  11. #include <__type_traits/enable_if.h>
  12. #include <__type_traits/is_arithmetic.h>
  13. #include <__type_traits/promote.h>
  14. #include <limits>
  15. #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  16. # pragma GCC system_header
  17. #endif
  18. _LIBCPP_BEGIN_NAMESPACE_STD
  19. namespace __math {
  20. // copysign
  21. _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI float copysign(float __x, float __y) _NOEXCEPT {
  22. return ::__builtin_copysignf(__x, __y);
  23. }
  24. _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI long double copysign(long double __x, long double __y) _NOEXCEPT {
  25. return ::__builtin_copysignl(__x, __y);
  26. }
  27. template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0>
  28. _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI typename __promote<_A1, _A2>::type
  29. copysign(_A1 __x, _A2 __y) _NOEXCEPT {
  30. return ::__builtin_copysign(__x, __y);
  31. }
  32. } // namespace __math
  33. _LIBCPP_END_NAMESPACE_STD
  34. #endif // _LIBCPP___MATH_COPYSIGN_H