100 lines · c
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_INVERSE_TRIGONOMETRIC_FUNCTIONS_H10#define _LIBCPP___MATH_INVERSE_TRIGONOMETRIC_FUNCTIONS_H11 12#include <__config>13#include <__type_traits/enable_if.h>14#include <__type_traits/is_arithmetic.h>15#include <__type_traits/is_integral.h>16#include <__type_traits/is_same.h>17#include <__type_traits/promote.h>18 19#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)20# pragma GCC system_header21#endif22 23_LIBCPP_BEGIN_NAMESPACE_STD24 25namespace __math {26 27// acos28 29inline _LIBCPP_HIDE_FROM_ABI float acos(float __x) _NOEXCEPT { return __builtin_acosf(__x); }30 31template <class = int>32_LIBCPP_HIDE_FROM_ABI double acos(double __x) _NOEXCEPT {33 return __builtin_acos(__x);34}35 36inline _LIBCPP_HIDE_FROM_ABI long double acos(long double __x) _NOEXCEPT { return __builtin_acosl(__x); }37 38template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>39inline _LIBCPP_HIDE_FROM_ABI double acos(_A1 __x) _NOEXCEPT {40 return __builtin_acos((double)__x);41}42 43// asin44 45inline _LIBCPP_HIDE_FROM_ABI float asin(float __x) _NOEXCEPT { return __builtin_asinf(__x); }46 47template <class = int>48_LIBCPP_HIDE_FROM_ABI double asin(double __x) _NOEXCEPT {49 return __builtin_asin(__x);50}51 52inline _LIBCPP_HIDE_FROM_ABI long double asin(long double __x) _NOEXCEPT { return __builtin_asinl(__x); }53 54template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>55inline _LIBCPP_HIDE_FROM_ABI double asin(_A1 __x) _NOEXCEPT {56 return __builtin_asin((double)__x);57}58 59// atan60 61inline _LIBCPP_HIDE_FROM_ABI float atan(float __x) _NOEXCEPT { return __builtin_atanf(__x); }62 63template <class = int>64_LIBCPP_HIDE_FROM_ABI double atan(double __x) _NOEXCEPT {65 return __builtin_atan(__x);66}67 68inline _LIBCPP_HIDE_FROM_ABI long double atan(long double __x) _NOEXCEPT { return __builtin_atanl(__x); }69 70template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>71inline _LIBCPP_HIDE_FROM_ABI double atan(_A1 __x) _NOEXCEPT {72 return __builtin_atan((double)__x);73}74 75// atan276 77inline _LIBCPP_HIDE_FROM_ABI float atan2(float __y, float __x) _NOEXCEPT { return __builtin_atan2f(__y, __x); }78 79template <class = int>80_LIBCPP_HIDE_FROM_ABI double atan2(double __x, double __y) _NOEXCEPT {81 return __builtin_atan2(__x, __y);82}83 84inline _LIBCPP_HIDE_FROM_ABI long double atan2(long double __y, long double __x) _NOEXCEPT {85 return __builtin_atan2l(__y, __x);86}87 88template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0>89inline _LIBCPP_HIDE_FROM_ABI __promote_t<_A1, _A2> atan2(_A1 __y, _A2 __x) _NOEXCEPT {90 using __result_type = __promote_t<_A1, _A2>;91 static_assert(!(_IsSame<_A1, __result_type>::value && _IsSame<_A2, __result_type>::value), "");92 return __math::atan2((__result_type)__y, (__result_type)__x);93}94 95} // namespace __math96 97_LIBCPP_END_NAMESPACE_STD98 99#endif // _LIBCPP___MATH_INVERSE_TRIGONOMETRIC_FUNCTIONS_H100