libcxx/include/__math/exponential_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_EXPONENTIAL_FUNCTIONS_H
  10 #define _LIBCPP___MATH_EXPONENTIAL_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 // exp
  28
  29 inline _LIBCPP_HIDE_FROM_ABI float exp(float __x) _NOEXCEPT { return __builtin_expf(__x); }
  30
  31 template <class = int>
  32 _LIBCPP_HIDE_FROM_ABI double exp(double __x) _NOEXCEPT {
  33   return __builtin_exp(__x);
  34 }
  35
  36 inline _LIBCPP_HIDE_FROM_ABI long double exp(long double __x) _NOEXCEPT { return __builtin_expl(__x); }
  37
  38 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
  39 inline _LIBCPP_HIDE_FROM_ABI double exp(_A1 __x) _NOEXCEPT {
  40   return __builtin_exp((double)__x);
  41 }
  42
  43 // frexp
  44
  45 inline _LIBCPP_HIDE_FROM_ABI float frexp(float __x, int* __e) _NOEXCEPT { return __builtin_frexpf(__x, __e); }
  46
  47 template <class = int>
  48 _LIBCPP_HIDE_FROM_ABI double frexp(double __x, int* __e) _NOEXCEPT {
  49   return __builtin_frexp(__x, __e);
  50 }
  51
  52 inline _LIBCPP_HIDE_FROM_ABI long double frexp(long double __x, int* __e) _NOEXCEPT {
  53   return __builtin_frexpl(__x, __e);
  54 }
  55
  56 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
  57 inline _LIBCPP_HIDE_FROM_ABI double frexp(_A1 __x, int* __e) _NOEXCEPT {
  58   return __builtin_frexp((double)__x, __e);
  59 }
  60
  61 // ldexp
  62
  63 inline _LIBCPP_HIDE_FROM_ABI float ldexp(float __x, int __e) _NOEXCEPT { return __builtin_ldexpf(__x, __e); }
  64
  65 template <class = int>
  66 _LIBCPP_HIDE_FROM_ABI double ldexp(double __x, int __e) _NOEXCEPT {
  67   return __builtin_ldexp(__x, __e);
  68 }
  69
  70 inline _LIBCPP_HIDE_FROM_ABI long double ldexp(long double __x, int __e) _NOEXCEPT {
  71   return __builtin_ldexpl(__x, __e);
  72 }
  73
  74 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
  75 inline _LIBCPP_HIDE_FROM_ABI double ldexp(_A1 __x, int __e) _NOEXCEPT {
  76   return __builtin_ldexp((double)__x, __e);
  77 }
  78
  79 // exp2
  80
  81 inline _LIBCPP_HIDE_FROM_ABI float exp2(float __x) _NOEXCEPT { return __builtin_exp2f(__x); }
  82
  83 template <class = int>
  84 _LIBCPP_HIDE_FROM_ABI double exp2(double __x) _NOEXCEPT {
  85   return __builtin_exp2(__x);
  86 }
  87
  88 inline _LIBCPP_HIDE_FROM_ABI long double exp2(long double __x) _NOEXCEPT { return __builtin_exp2l(__x); }
  89
  90 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
  91 inline _LIBCPP_HIDE_FROM_ABI double exp2(_A1 __x) _NOEXCEPT {
  92   return __builtin_exp2((double)__x);
  93 }
  94
  95 // expm1
  96
  97 inline _LIBCPP_HIDE_FROM_ABI float expm1(float __x) _NOEXCEPT { return __builtin_expm1f(__x); }
  98
  99 template <class = int>
 100 _LIBCPP_HIDE_FROM_ABI double expm1(double __x) _NOEXCEPT {
 101   return __builtin_expm1(__x);
 102 }
 103
 104 inline _LIBCPP_HIDE_FROM_ABI long double expm1(long double __x) _NOEXCEPT { return __builtin_expm1l(__x); }
 105
 106 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
 107 inline _LIBCPP_HIDE_FROM_ABI double expm1(_A1 __x) _NOEXCEPT {
 108   return __builtin_expm1((double)__x);
 109 }
 110
 111 // scalbln
 112
 113 inline _LIBCPP_HIDE_FROM_ABI float scalbln(float __x, long __y) _NOEXCEPT { return __builtin_scalblnf(__x, __y); }
 114
 115 template <class = int>
 116 _LIBCPP_HIDE_FROM_ABI double scalbln(double __x, long __y) _NOEXCEPT {
 117   return __builtin_scalbln(__x, __y);
 118 }
 119
 120 inline _LIBCPP_HIDE_FROM_ABI long double scalbln(long double __x, long __y) _NOEXCEPT {
 121   return __builtin_scalblnl(__x, __y);
 122 }
 123
 124 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
 125 inline _LIBCPP_HIDE_FROM_ABI double scalbln(_A1 __x, long __y) _NOEXCEPT {
 126   return __builtin_scalbln((double)__x, __y);
 127 }
 128
 129 // scalbn
 130
 131 inline _LIBCPP_HIDE_FROM_ABI float scalbn(float __x, int __y) _NOEXCEPT { return __builtin_scalbnf(__x, __y); }
 132
 133 template <class = int>
 134 _LIBCPP_HIDE_FROM_ABI double scalbn(double __x, int __y) _NOEXCEPT {
 135   return __builtin_scalbn(__x, __y);
 136 }
 137
 138 inline _LIBCPP_HIDE_FROM_ABI long double scalbn(long double __x, int __y) _NOEXCEPT {
 139   return __builtin_scalbnl(__x, __y);
 140 }
 141
 142 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
 143 inline _LIBCPP_HIDE_FROM_ABI double scalbn(_A1 __x, int __y) _NOEXCEPT {
 144   return __builtin_scalbn((double)__x, __y);
 145 }
 146
 147 // pow
 148
 149 inline _LIBCPP_HIDE_FROM_ABI float pow(float __x, float __y) _NOEXCEPT { return __builtin_powf(__x, __y); }
 150
 151 template <class = int>
 152 _LIBCPP_HIDE_FROM_ABI double pow(double __x, double __y) _NOEXCEPT {
 153   return __builtin_pow(__x, __y);
 154 }
 155
 156 inline _LIBCPP_HIDE_FROM_ABI long double pow(long double __x, long double __y) _NOEXCEPT {
 157   return __builtin_powl(__x, __y);
 158 }
 159
 160 template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0>
 161 inline _LIBCPP_HIDE_FROM_ABI typename __promote<_A1, _A2>::type pow(_A1 __x, _A2 __y) _NOEXCEPT {
 162   using __result_type = typename __promote<_A1, _A2>::type;
 163   static_assert(!(_IsSame<_A1, __result_type>::value && _IsSame<_A2, __result_type>::value), "");
 164   return __math::pow((__result_type)__x, (__result_type)__y);
 165 }
 166
 167 } // namespace __math
 168
 169 _LIBCPP_END_NAMESPACE_STD
 170
 171 #endif // _LIBCPP___MATH_EXPONENTIAL_FUNCTIONS_H