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37b204de JW |
1 | // -*- C++ -*- C library enhancements header. |
2 | ||
83ffe9cd | 3 | // Copyright (C) 2016-2023 Free Software Foundation, Inc. |
37b204de JW |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
8 | // Free Software Foundation; either version 3, or (at your option) | |
9 | // any later version. | |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
16 | // Under Section 7 of GPL version 3, you are granted additional | |
17 | // permissions described in the GCC Runtime Library Exception, version | |
18 | // 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | // You should have received a copy of the GNU General Public License and | |
21 | // a copy of the GCC Runtime Library Exception along with this program; | |
22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | // <http://www.gnu.org/licenses/>. | |
24 | ||
25 | /** @file include/bits/std_abs.h | |
26 | * This is an internal header file, included by other library headers. | |
27 | * Do not attempt to use it directly. @headername{cmath, cstdlib} | |
28 | */ | |
29 | ||
30 | #ifndef _GLIBCXX_BITS_STD_ABS_H | |
31 | #define _GLIBCXX_BITS_STD_ABS_H | |
32 | ||
33 | #pragma GCC system_header | |
34 | ||
35 | #include <bits/c++config.h> | |
36 | ||
37 | #define _GLIBCXX_INCLUDE_NEXT_C_HEADERS | |
38 | #include_next <stdlib.h> | |
39 | #ifdef __CORRECT_ISO_CPP_MATH_H_PROTO | |
40 | # include_next <math.h> | |
41 | #endif | |
42 | #undef _GLIBCXX_INCLUDE_NEXT_C_HEADERS | |
43 | ||
44 | #undef abs | |
45 | ||
6a0d23af JW |
46 | extern "C++" |
47 | { | |
37b204de JW |
48 | namespace std _GLIBCXX_VISIBILITY(default) |
49 | { | |
50 | _GLIBCXX_BEGIN_NAMESPACE_VERSION | |
51 | ||
52 | using ::abs; | |
53 | ||
54 | #ifndef __CORRECT_ISO_CPP_STDLIB_H_PROTO | |
55 | inline long | |
56 | abs(long __i) { return __builtin_labs(__i); } | |
57 | #endif | |
58 | ||
59 | #ifdef _GLIBCXX_USE_LONG_LONG | |
60 | inline long long | |
61 | abs(long long __x) { return __builtin_llabs (__x); } | |
62 | #endif | |
63 | ||
64 | // _GLIBCXX_RESOLVE_LIB_DEFECTS | |
65 | // 2192. Validity and return type of std::abs(0u) is unclear | |
66 | // 2294. <cstdlib> should declare abs(double) | |
8936f531 | 67 | // 2735. std::abs(short), std::abs(signed char) and others should return int |
37b204de JW |
68 | |
69 | #ifndef __CORRECT_ISO_CPP_MATH_H_PROTO | |
70 | inline _GLIBCXX_CONSTEXPR double | |
71 | abs(double __x) | |
72 | { return __builtin_fabs(__x); } | |
73 | ||
74 | inline _GLIBCXX_CONSTEXPR float | |
75 | abs(float __x) | |
76 | { return __builtin_fabsf(__x); } | |
77 | ||
78 | inline _GLIBCXX_CONSTEXPR long double | |
79 | abs(long double __x) | |
80 | { return __builtin_fabsl(__x); } | |
81 | #endif | |
82 | ||
83 | #if defined(__GLIBCXX_TYPE_INT_N_0) | |
42167831 | 84 | __extension__ inline _GLIBCXX_CONSTEXPR __GLIBCXX_TYPE_INT_N_0 |
37b204de JW |
85 | abs(__GLIBCXX_TYPE_INT_N_0 __x) { return __x >= 0 ? __x : -__x; } |
86 | #endif | |
87 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
42167831 | 88 | __extension__ inline _GLIBCXX_CONSTEXPR __GLIBCXX_TYPE_INT_N_1 |
37b204de JW |
89 | abs(__GLIBCXX_TYPE_INT_N_1 __x) { return __x >= 0 ? __x : -__x; } |
90 | #endif | |
91 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
42167831 | 92 | __extension__ inline _GLIBCXX_CONSTEXPR __GLIBCXX_TYPE_INT_N_2 |
37b204de JW |
93 | abs(__GLIBCXX_TYPE_INT_N_2 __x) { return __x >= 0 ? __x : -__x; } |
94 | #endif | |
95 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
42167831 | 96 | __extension__ inline _GLIBCXX_CONSTEXPR __GLIBCXX_TYPE_INT_N_3 |
37b204de JW |
97 | abs(__GLIBCXX_TYPE_INT_N_3 __x) { return __x >= 0 ? __x : -__x; } |
98 | #endif | |
99 | ||
a23225fb JJ |
100 | #if defined(__STDCPP_FLOAT16_T__) && defined(_GLIBCXX_FLOAT_IS_IEEE_BINARY32) |
101 | constexpr _Float16 | |
102 | abs(_Float16 __x) | |
103 | { return _Float16(__builtin_fabsf(__x)); } | |
104 | #endif | |
105 | ||
106 | #if defined(__STDCPP_FLOAT32_T__) && defined(_GLIBCXX_FLOAT_IS_IEEE_BINARY32) | |
107 | constexpr _Float32 | |
108 | abs(_Float32 __x) | |
109 | { return __builtin_fabsf(__x); } | |
110 | #endif | |
111 | ||
112 | #if defined(__STDCPP_FLOAT64_T__) && defined(_GLIBCXX_DOUBLE_IS_IEEE_BINARY64) | |
113 | constexpr _Float64 | |
114 | abs(_Float64 __x) | |
115 | { return __builtin_fabs(__x); } | |
116 | #endif | |
117 | ||
118 | #if defined(__STDCPP_FLOAT128_T__) && defined(_GLIBCXX_LDOUBLE_IS_IEEE_BINARY128) | |
119 | constexpr _Float128 | |
120 | abs(_Float128 __x) | |
121 | { return __builtin_fabsl(__x); } | |
122 | #elif defined(__STDCPP_FLOAT128_T__) && defined(_GLIBCXX_HAVE_FLOAT128_MATH) | |
123 | constexpr _Float128 | |
124 | abs(_Float128 __x) | |
125 | { return __builtin_fabsf128(__x); } | |
126 | #endif | |
127 | ||
128 | #if defined(__STDCPP_BFLOAT16_T__) && defined(_GLIBCXX_FLOAT_IS_IEEE_BINARY32) | |
129 | constexpr __gnu_cxx::__bfloat16_t | |
130 | abs(__gnu_cxx::__bfloat16_t __x) | |
131 | { return __gnu_cxx::__bfloat16_t(__builtin_fabsf(__x)); } | |
132 | #endif | |
133 | ||
37b204de | 134 | #if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128) |
42167831 | 135 | __extension__ inline _GLIBCXX_CONSTEXPR |
37b204de JW |
136 | __float128 |
137 | abs(__float128 __x) | |
138 | { return __x < 0 ? -__x : __x; } | |
139 | #endif | |
140 | ||
141 | _GLIBCXX_END_NAMESPACE_VERSION | |
142 | } // namespace | |
daf69489 | 143 | } // extern "C"++" |
37b204de JW |
144 | |
145 | #endif // _GLIBCXX_BITS_STD_ABS_H |