154 lines
4.6 KiB
C++
154 lines
4.6 KiB
C++
// -*- C++ -*- C library enhancements header.
|
|
|
|
// Copyright (C) 2016-2024 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
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// 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
|
|
// <http://www.gnu.org/licenses/>.
|
|
|
|
/** @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}
|
|
*/
|
|
|
|
#ifndef _GLIBCXX_BITS_STD_ABS_H
|
|
#define _GLIBCXX_BITS_STD_ABS_H
|
|
|
|
#pragma GCC system_header
|
|
|
|
#include <bits/c++config.h>
|
|
|
|
#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
|
|
#include_next <stdlib.h>
|
|
#ifdef __CORRECT_ISO_CPP_MATH_H_PROTO
|
|
# include_next <math.h>
|
|
#endif
|
|
#undef _GLIBCXX_INCLUDE_NEXT_C_HEADERS
|
|
|
|
#undef abs
|
|
|
|
extern "C++"
|
|
{
|
|
namespace std _GLIBCXX_VISIBILITY(default)
|
|
{
|
|
_GLIBCXX_BEGIN_NAMESPACE_VERSION
|
|
|
|
using ::abs;
|
|
|
|
#ifndef __CORRECT_ISO_CPP_STDLIB_H_PROTO
|
|
inline long
|
|
abs(long __i) { return __builtin_labs(__i); }
|
|
#endif
|
|
|
|
#ifdef _GLIBCXX_USE_LONG_LONG
|
|
inline long long
|
|
abs(long long __x) { return __builtin_llabs (__x); }
|
|
#endif
|
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 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
|
|
|
|
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
|
|
inline _GLIBCXX_CONSTEXPR double
|
|
abs(double __x)
|
|
{ return __builtin_fabs(__x); }
|
|
|
|
inline _GLIBCXX_CONSTEXPR float
|
|
abs(float __x)
|
|
{ return __builtin_fabsf(__x); }
|
|
|
|
inline _GLIBCXX_CONSTEXPR long double
|
|
abs(long double __x)
|
|
{ return __builtin_fabsl(__x); }
|
|
#endif
|
|
|
|
#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; }
|
|
#endif
|
|
#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; }
|
|
#endif
|
|
#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; }
|
|
#endif
|
|
#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; }
|
|
#endif
|
|
|
|
#if defined(__STDCPP_FLOAT16_T__) && defined(_GLIBCXX_FLOAT_IS_IEEE_BINARY32)
|
|
constexpr _Float16
|
|
abs(_Float16 __x)
|
|
{ return _Float16(__builtin_fabsf(__x)); }
|
|
#endif
|
|
|
|
#if defined(__STDCPP_FLOAT32_T__) && defined(_GLIBCXX_FLOAT_IS_IEEE_BINARY32)
|
|
constexpr _Float32
|
|
abs(_Float32 __x)
|
|
{ return __builtin_fabsf(__x); }
|
|
#endif
|
|
|
|
#if defined(__STDCPP_FLOAT64_T__) && defined(_GLIBCXX_DOUBLE_IS_IEEE_BINARY64)
|
|
constexpr _Float64
|
|
abs(_Float64 __x)
|
|
{ return __builtin_fabs(__x); }
|
|
#endif
|
|
|
|
#if defined(__STDCPP_FLOAT128_T__) && defined(_GLIBCXX_LDOUBLE_IS_IEEE_BINARY128)
|
|
constexpr _Float128
|
|
abs(_Float128 __x)
|
|
{ return __builtin_fabsl(__x); }
|
|
#elif defined(__STDCPP_FLOAT128_T__) && defined(_GLIBCXX_HAVE_FLOAT128_MATH)
|
|
constexpr _Float128
|
|
abs(_Float128 __x)
|
|
{ return __builtin_fabsf128(__x); }
|
|
#endif
|
|
|
|
#if defined(__STDCPP_BFLOAT16_T__) && defined(_GLIBCXX_FLOAT_IS_IEEE_BINARY32)
|
|
constexpr __gnu_cxx::__bfloat16_t
|
|
abs(__gnu_cxx::__bfloat16_t __x)
|
|
{ return __gnu_cxx::__bfloat16_t(__builtin_fabsf(__x)); }
|
|
#endif
|
|
|
|
#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128)
|
|
__extension__ inline _GLIBCXX_CONSTEXPR
|
|
__float128
|
|
abs(__float128 __x)
|
|
{
|
|
#if defined(_GLIBCXX_LDOUBLE_IS_IEEE_BINARY128)
|
|
return __builtin_fabsl(__x);
|
|
#elif defined(_GLIBCXX_HAVE_FLOAT128_MATH)
|
|
return __builtin_fabsf128(__x);
|
|
#else
|
|
// Assume that __builtin_signbit works for __float128.
|
|
return __builtin_signbit(__x) ? -__x : __x;
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
} // namespace
|
|
} // extern "C++"
|
|
|
|
#endif // _GLIBCXX_BITS_STD_ABS_H
|