libcxx/include/__math/logarithms.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_LOGARITHMS_H
  10 #define _LIBCPP___MATH_LOGARITHMS_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 // log
  25
  26 inline _LIBCPP_HIDE_FROM_ABI float log(float __x) _NOEXCEPT { return __builtin_logf(__x); }
  27
  28 template <class = int>
  29 _LIBCPP_HIDE_FROM_ABI double log(double __x) _NOEXCEPT {
  30   return __builtin_log(__x);
  31 }
  32
  33 inline _LIBCPP_HIDE_FROM_ABI long double log(long double __x) _NOEXCEPT { return __builtin_logl(__x); }
  34
  35 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
  36 inline _LIBCPP_HIDE_FROM_ABI double log(_A1 __x) _NOEXCEPT {
  37   return __builtin_log((double)__x);
  38 }
  39
  40 // log10
  41
  42 inline _LIBCPP_HIDE_FROM_ABI float log10(float __x) _NOEXCEPT { return __builtin_log10f(__x); }
  43
  44 template <class = int>
  45 _LIBCPP_HIDE_FROM_ABI double log10(double __x) _NOEXCEPT {
  46   return __builtin_log10(__x);
  47 }
  48
  49 inline _LIBCPP_HIDE_FROM_ABI long double log10(long double __x) _NOEXCEPT { return __builtin_log10l(__x); }
  50
  51 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
  52 inline _LIBCPP_HIDE_FROM_ABI double log10(_A1 __x) _NOEXCEPT {
  53   return __builtin_log10((double)__x);
  54 }
  55
  56 // ilogb
  57
  58 inline _LIBCPP_HIDE_FROM_ABI int ilogb(float __x) _NOEXCEPT { return __builtin_ilogbf(__x); }
  59
  60 template <class = int>
  61 _LIBCPP_HIDE_FROM_ABI double ilogb(double __x) _NOEXCEPT {
  62   return __builtin_ilogb(__x);
  63 }
  64
  65 inline _LIBCPP_HIDE_FROM_ABI int ilogb(long double __x) _NOEXCEPT { return __builtin_ilogbl(__x); }
  66
  67 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
  68 inline _LIBCPP_HIDE_FROM_ABI int ilogb(_A1 __x) _NOEXCEPT {
  69   return __builtin_ilogb((double)__x);
  70 }
  71
  72 // log1p
  73
  74 inline _LIBCPP_HIDE_FROM_ABI float log1p(float __x) _NOEXCEPT { return __builtin_log1pf(__x); }
  75
  76 template <class = int>
  77 _LIBCPP_HIDE_FROM_ABI double log1p(double __x) _NOEXCEPT {
  78   return __builtin_log1p(__x);
  79 }
  80
  81 inline _LIBCPP_HIDE_FROM_ABI long double log1p(long double __x) _NOEXCEPT { return __builtin_log1pl(__x); }
  82
  83 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
  84 inline _LIBCPP_HIDE_FROM_ABI double log1p(_A1 __x) _NOEXCEPT {
  85   return __builtin_log1p((double)__x);
  86 }
  87
  88 // log2
  89
  90 inline _LIBCPP_HIDE_FROM_ABI float log2(float __x) _NOEXCEPT { return __builtin_log2f(__x); }
  91
  92 template <class = int>
  93 _LIBCPP_HIDE_FROM_ABI double log2(double __x) _NOEXCEPT {
  94   return __builtin_log2(__x);
  95 }
  96
  97 inline _LIBCPP_HIDE_FROM_ABI long double log2(long double __x) _NOEXCEPT { return __builtin_log2l(__x); }
  98
  99 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
 100 inline _LIBCPP_HIDE_FROM_ABI double log2(_A1 __x) _NOEXCEPT {
 101   return __builtin_log2((double)__x);
 102 }
 103
 104 // logb
 105
 106 inline _LIBCPP_HIDE_FROM_ABI float logb(float __x) _NOEXCEPT { return __builtin_logbf(__x); }
 107
 108 template <class = int>
 109 _LIBCPP_HIDE_FROM_ABI double logb(double __x) _NOEXCEPT {
 110   return __builtin_logb(__x);
 111 }
 112
 113 inline _LIBCPP_HIDE_FROM_ABI long double logb(long double __x) _NOEXCEPT { return __builtin_logbl(__x); }
 114
 115 template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
 116 inline _LIBCPP_HIDE_FROM_ABI double logb(_A1 __x) _NOEXCEPT {
 117   return __builtin_logb((double)__x);
 118 }
 119
 120 } // namespace __math
 121
 122 _LIBCPP_END_NAMESPACE_STD
 123
 124 #endif // _LIBCPP___MATH_LOGARITHMS_H