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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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___MATH_GAMMA_H10#define _LIBCPP___MATH_GAMMA_H11 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_header18#endif19 20_LIBCPP_BEGIN_NAMESPACE_STD21 22namespace __math {23 24// lgamma25 26inline _LIBCPP_HIDE_FROM_ABI float lgamma(float __x) _NOEXCEPT { return __builtin_lgammaf(__x); }27 28template <class = int>29_LIBCPP_HIDE_FROM_ABI double lgamma(double __x) _NOEXCEPT {30 return __builtin_lgamma(__x);31}32 33inline _LIBCPP_HIDE_FROM_ABI long double lgamma(long double __x) _NOEXCEPT { return __builtin_lgammal(__x); }34 35template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>36inline _LIBCPP_HIDE_FROM_ABI double lgamma(_A1 __x) _NOEXCEPT {37 return __builtin_lgamma((double)__x);38}39 40// nan41 42// tgamma43 44inline _LIBCPP_HIDE_FROM_ABI float tgamma(float __x) _NOEXCEPT { return __builtin_tgammaf(__x); }45 46template <class = int>47_LIBCPP_HIDE_FROM_ABI double tgamma(double __x) _NOEXCEPT {48 return __builtin_tgamma(__x);49}50 51inline _LIBCPP_HIDE_FROM_ABI long double tgamma(long double __x) _NOEXCEPT { return __builtin_tgammal(__x); }52 53template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>54inline _LIBCPP_HIDE_FROM_ABI double tgamma(_A1 __x) _NOEXCEPT {55 return __builtin_tgamma((double)__x);56}57 58} // namespace __math59 60_LIBCPP_END_NAMESPACE_STD61 62#endif // _LIBCPP___MATH_GAMMA_H63