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 9 #ifndef _LIBCPP___MATH_GAMMA_H 10 #define _LIBCPP___MATH_GAMMA_H 11 12 #include <__config> 13 #include <__type_traits/enable_if.h> 14 #include <__type_traits/is_integral.h> 15 16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17 # pragma GCC system_header 18 #endif 19 20 _LIBCPP_BEGIN_NAMESPACE_STD 21 22 namespace __math { 23 24 // lgamma 25 26 inline _LIBCPP_HIDE_FROM_ABI float lgamma(float __x) _NOEXCEPT { return __builtin_lgammaf(__x); } 27 28 template <class = int> 29 _LIBCPP_HIDE_FROM_ABI double lgamma(double __x) _NOEXCEPT { 30 return __builtin_lgamma(__x); 31 } 32 33 inline _LIBCPP_HIDE_FROM_ABI long double lgamma(long double __x) _NOEXCEPT { return __builtin_lgammal(__x); } 34 35 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0> 36 inline _LIBCPP_HIDE_FROM_ABI double lgamma(_A1 __x) _NOEXCEPT { 37 return __builtin_lgamma((double)__x); 38 } 39 40 // nan 41 42 // tgamma 43 44 inline _LIBCPP_HIDE_FROM_ABI float tgamma(float __x) _NOEXCEPT { return __builtin_tgammaf(__x); } 45 46 template <class = int> 47 _LIBCPP_HIDE_FROM_ABI double tgamma(double __x) _NOEXCEPT { 48 return __builtin_tgamma(__x); 49 } 50 51 inline _LIBCPP_HIDE_FROM_ABI long double tgamma(long double __x) _NOEXCEPT { return __builtin_tgammal(__x); } 52 53 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0> 54 inline _LIBCPP_HIDE_FROM_ABI double tgamma(_A1 __x) _NOEXCEPT { 55 return __builtin_tgamma((double)__x); 56 } 57 58 } // namespace __math 59 60 _LIBCPP_END_NAMESPACE_STD 61 62 #endif // _LIBCPP___MATH_GAMMA_H 63