libcxx/include/__math/inverse_trigonometric_functions.h

   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_INVERSE_TRIGONOMETRIC_FUNCTIONS_H
  10 #define _LIBCPP___MATH_INVERSE_TRIGONOMETRIC_FUNCTIONS_H
  11
  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_header
  21 #endif
  22
  23 _LIBCPP_BEGIN_NAMESPACE_STD
  24
  25 namespace __math {
  26
  27 // acos
  28
  29 inline _LIBCPP_HIDE_FROM_ABI float acos(float __x) _NOEXCEPT { return __builtin_acosf(__x); }
  30
  31 template <class = int>
  32 _LIBCPP_HIDE_FROM_ABI double acos(double __x) _NOEXCEPT {
  33   return __builtin_acos(__x);
  34 }
  35
  36 inline _LIBCPP_HIDE_FROM_ABI long double acos(long double __x) _NOEXCEPT { return __builtin_acosl(__x); }
  37
  38 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
  39 inline _LIBCPP_HIDE_FROM_ABI double acos(_A1 __x) _NOEXCEPT {
  40   return __builtin_acos((double)__x);
  41 }
  42
  43 // asin
  44
  45 inline _LIBCPP_HIDE_FROM_ABI float asin(float __x) _NOEXCEPT { return __builtin_asinf(__x); }
  46
  47 template <class = int>
  48 _LIBCPP_HIDE_FROM_ABI double asin(double __x) _NOEXCEPT {
  49   return __builtin_asin(__x);
  50 }
  51
  52 inline _LIBCPP_HIDE_FROM_ABI long double asin(long double __x) _NOEXCEPT { return __builtin_asinl(__x); }
  53
  54 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
  55 inline _LIBCPP_HIDE_FROM_ABI double asin(_A1 __x) _NOEXCEPT {
  56   return __builtin_asin((double)__x);
  57 }
  58
  59 // atan
  60
  61 inline _LIBCPP_HIDE_FROM_ABI float atan(float __x) _NOEXCEPT { return __builtin_atanf(__x); }
  62
  63 template <class = int>
  64 _LIBCPP_HIDE_FROM_ABI double atan(double __x) _NOEXCEPT {
  65   return __builtin_atan(__x);
  66 }
  67
  68 inline _LIBCPP_HIDE_FROM_ABI long double atan(long double __x) _NOEXCEPT { return __builtin_atanl(__x); }
  69
  70 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
  71 inline _LIBCPP_HIDE_FROM_ABI double atan(_A1 __x) _NOEXCEPT {
  72   return __builtin_atan((double)__x);
  73 }
  74
  75 // atan2
  76
  77 inline _LIBCPP_HIDE_FROM_ABI float atan2(float __y, float __x) _NOEXCEPT { return __builtin_atan2f(__y, __x); }
  78
  79 template <class = int>
  80 _LIBCPP_HIDE_FROM_ABI double atan2(double __x, double __y) _NOEXCEPT {
  81   return __builtin_atan2(__x, __y);
  82 }
  83
  84 inline _LIBCPP_HIDE_FROM_ABI long double atan2(long double __y, long double __x) _NOEXCEPT {
  85   return __builtin_atan2l(__y, __x);
  86 }
  87
  88 template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0>
  89 inline _LIBCPP_HIDE_FROM_ABI typename __promote<_A1, _A2>::type atan2(_A1 __y, _A2 __x) _NOEXCEPT {
  90   using __result_type = typename __promote<_A1, _A2>::type;
  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 __math
  96
  97 _LIBCPP_END_NAMESPACE_STD
  98
  99 #endif // _LIBCPP___MATH_INVERSE_TRIGONOMETRIC_FUNCTIONS_H