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134723edd5
This is a fairly mechanical change, it just moves each algorithm into its own header. This is intended to be a NFC. This commit re-applies 7ed7d4ccb899, which was reverted in 692d7166f771 because the Modules build got broken. The modules build has now been fixed, so we're re-committing this. Differential Revision: https://reviews.llvm.org/D103583 Attribution note ---------------- I'm only committing this. This commit is a mix of D103583, D103330 and D104171 authored by: Co-authored-by: Christopher Di Bella <cjdb@google.com> Co-authored-by: zoecarver <z.zoelec2@gmail.com>
55 lines
1.3 KiB
C++
55 lines
1.3 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___ALGORITHM_HALF_POSITIVE_H
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#define _LIBCPP___ALGORITHM_HALF_POSITIVE_H
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#include <__config>
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#include <type_traits>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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#pragma GCC system_header
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#endif
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_LIBCPP_PUSH_MACROS
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#include <__undef_macros>
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_LIBCPP_BEGIN_NAMESPACE_STD
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// Perform division by two quickly for positive integers (llvm.org/PR39129)
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template <typename _Integral>
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
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typename enable_if
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<
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is_integral<_Integral>::value,
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_Integral
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>::type
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__half_positive(_Integral __value)
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{
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return static_cast<_Integral>(static_cast<typename make_unsigned<_Integral>::type>(__value) / 2);
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}
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template <typename _Tp>
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
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typename enable_if
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<
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!is_integral<_Tp>::value,
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_Tp
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>::type
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__half_positive(_Tp __value)
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{
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return __value / 2;
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}
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_LIBCPP_END_NAMESPACE_STD
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_LIBCPP_POP_MACROS
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#endif // _LIBCPP___ALGORITHM_HALF_POSITIVE_H
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