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// -*- C++ -*- C library enhancements header.
// Copyright (C) 2016-2021 Free Software Foundation, Inc.
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <>.
/** @file include/bits/std_abs.h
* This is an internal header file, included by other library headers.
* Do not attempt to use it directly. @headername{cmath, cstdlib}
#pragma GCC system_header
#include <bits/c++config.h>
#include_next <stdlib.h>
# include_next <math.h>
#undef abs
extern "C++"
namespace std _GLIBCXX_VISIBILITY(default)
using ::abs;
inline long
abs(long __i) { return __builtin_labs(__i); }
inline long long
abs(long long __x) { return __builtin_llabs (__x); }
// 2192. Validity and return type of std::abs(0u) is unclear
// 2294. <cstdlib> should declare abs(double)
// 2735. std::abs(short), std::abs(signed char) and others should return int
inline _GLIBCXX_CONSTEXPR double
abs(double __x)
{ return __builtin_fabs(__x); }
abs(float __x)
{ return __builtin_fabsf(__x); }
inline _GLIBCXX_CONSTEXPR long double
abs(long double __x)
{ return __builtin_fabsl(__x); }
#if defined(__GLIBCXX_TYPE_INT_N_0)
__extension__ inline _GLIBCXX_CONSTEXPR __GLIBCXX_TYPE_INT_N_0
abs(__GLIBCXX_TYPE_INT_N_0 __x) { return __x >= 0 ? __x : -__x; }
#if defined(__GLIBCXX_TYPE_INT_N_1)
__extension__ inline _GLIBCXX_CONSTEXPR __GLIBCXX_TYPE_INT_N_1
abs(__GLIBCXX_TYPE_INT_N_1 __x) { return __x >= 0 ? __x : -__x; }
#if defined(__GLIBCXX_TYPE_INT_N_2)
__extension__ inline _GLIBCXX_CONSTEXPR __GLIBCXX_TYPE_INT_N_2
abs(__GLIBCXX_TYPE_INT_N_2 __x) { return __x >= 0 ? __x : -__x; }
#if defined(__GLIBCXX_TYPE_INT_N_3)
__extension__ inline _GLIBCXX_CONSTEXPR __GLIBCXX_TYPE_INT_N_3
abs(__GLIBCXX_TYPE_INT_N_3 __x) { return __x >= 0 ? __x : -__x; }
#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128)
__extension__ inline _GLIBCXX_CONSTEXPR
abs(__float128 __x)
{ return __x < 0 ? -__x : __x; }
} // namespace
} // extern "C"++"