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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-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef _LIBCPP___CXX03___MATH_TRAITS_H
10#define _LIBCPP___CXX03___MATH_TRAITS_H
11
12#include <__cxx03/__config>
13#include <__cxx03/__type_traits/enable_if.h>
14#include <__cxx03/__type_traits/is_arithmetic.h>
15#include <__cxx03/__type_traits/is_floating_point.h>
16#include <__cxx03/__type_traits/is_integral.h>
17#include <__cxx03/__type_traits/is_signed.h>
18#include <__cxx03/__type_traits/promote.h>
19#include <__cxx03/limits>
20
21#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
22# pragma GCC system_header
23#endif
24
25_LIBCPP_BEGIN_NAMESPACE_STD
26
27namespace __math {
28
29// signbit
30
31template <class _A1, __enable_if_t<is_floating_point<_A1>::value, int> = 0>
32_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool signbit(_A1 __x) _NOEXCEPT {
33 return __builtin_signbit(__x);
34}
35
36template <class _A1, __enable_if_t<is_integral<_A1>::value && is_signed<_A1>::value, int> = 0>
37_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool signbit(_A1 __x) _NOEXCEPT {
38 return __x < 0;
39}
40
41template <class _A1, __enable_if_t<is_integral<_A1>::value && !is_signed<_A1>::value, int> = 0>
42_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool signbit(_A1) _NOEXCEPT {
43 return false;
44}
45
46// isfinite
47
48template <class _A1, __enable_if_t<is_arithmetic<_A1>::value && numeric_limits<_A1>::has_infinity, int> = 0>
49_LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI bool isfinite(_A1 __x) _NOEXCEPT {
50 return __builtin_isfinite((typename __promote<_A1>::type)__x);
51}
52
53template <class _A1, __enable_if_t<is_arithmetic<_A1>::value && !numeric_limits<_A1>::has_infinity, int> = 0>
54_LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI bool isfinite(_A1) _NOEXCEPT {
55 return true;
56}
57
58_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool isfinite(float __x) _NOEXCEPT { return __builtin_isfinite(__x); }
59
60_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool isfinite(double __x) _NOEXCEPT { return __builtin_isfinite(__x); }
61
62_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool isfinite(long double __x) _NOEXCEPT {
63 return __builtin_isfinite(__x);
64}
65
66// isinf
67
68template <class _A1, __enable_if_t<is_arithmetic<_A1>::value && numeric_limits<_A1>::has_infinity, int> = 0>
69_LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI bool isinf(_A1 __x) _NOEXCEPT {
70 return __builtin_isinf((typename __promote<_A1>::type)__x);
71}
72
73template <class _A1, __enable_if_t<is_arithmetic<_A1>::value && !numeric_limits<_A1>::has_infinity, int> = 0>
74_LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI bool isinf(_A1) _NOEXCEPT {
75 return false;
76}
77
78#ifdef _LIBCPP_PREFERRED_OVERLOAD
79_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool isinf(float __x) _NOEXCEPT { return __builtin_isinf(__x); }
80
81_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD bool isinf(double __x) _NOEXCEPT {
82 return __builtin_isinf(__x);
83}
84
85_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool isinf(long double __x) _NOEXCEPT { return __builtin_isinf(__x); }
86#endif
87
88// isnan
89
90template <class _A1, __enable_if_t<is_floating_point<_A1>::value, int> = 0>
91_LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI bool isnan(_A1 __x) _NOEXCEPT {
92 return __builtin_isnan(__x);
93}
94
95template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
96_LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI bool isnan(_A1) _NOEXCEPT {
97 return false;
98}
99
100#ifdef _LIBCPP_PREFERRED_OVERLOAD
101_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool isnan(float __x) _NOEXCEPT { return __builtin_isnan(__x); }
102
103_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD bool isnan(double __x) _NOEXCEPT {
104 return __builtin_isnan(__x);
105}
106
107_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool isnan(long double __x) _NOEXCEPT { return __builtin_isnan(__x); }
108#endif
109
110// isnormal
111
112template <class _A1, __enable_if_t<is_floating_point<_A1>::value, int> = 0>
113_LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI bool isnormal(_A1 __x) _NOEXCEPT {
114 return __builtin_isnormal(__x);
115}
116
117template <class _A1, __enable_if_t<is_integral<_A1>::value, int> = 0>
118_LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI bool isnormal(_A1 __x) _NOEXCEPT {
119 return __x != 0;
120}
121
122// isgreater
123
124template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0>
125_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool isgreater(_A1 __x, _A2 __y) _NOEXCEPT {
126 using type = typename __promote<_A1, _A2>::type;
127 return __builtin_isgreater((type)__x, (type)__y);
128}
129
130// isgreaterequal
131
132template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0>
133_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool isgreaterequal(_A1 __x, _A2 __y) _NOEXCEPT {
134 using type = typename __promote<_A1, _A2>::type;
135 return __builtin_isgreaterequal((type)__x, (type)__y);
136}
137
138// isless
139
140template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0>
141_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool isless(_A1 __x, _A2 __y) _NOEXCEPT {
142 using type = typename __promote<_A1, _A2>::type;
143 return __builtin_isless((type)__x, (type)__y);
144}
145
146// islessequal
147
148template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0>
149_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool islessequal(_A1 __x, _A2 __y) _NOEXCEPT {
150 using type = typename __promote<_A1, _A2>::type;
151 return __builtin_islessequal((type)__x, (type)__y);
152}
153
154// islessgreater
155
156template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0>
157_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool islessgreater(_A1 __x, _A2 __y) _NOEXCEPT {
158 using type = typename __promote<_A1, _A2>::type;
159 return __builtin_islessgreater((type)__x, (type)__y);
160}
161
162// isunordered
163
164template <class _A1, class _A2, __enable_if_t<is_arithmetic<_A1>::value && is_arithmetic<_A2>::value, int> = 0>
165_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool isunordered(_A1 __x, _A2 __y) _NOEXCEPT {
166 using type = typename __promote<_A1, _A2>::type;
167 return __builtin_isunordered((type)__x, (type)__y);
168}
169
170} // namespace __math
171
172_LIBCPP_END_NAMESPACE_STD
173
174#endif // _LIBCPP___CXX03___MATH_TRAITS_H
175

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source code of libcxx/include/__cxx03/__math/traits.h