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https://github.com/capstone-engine/llvm-capstone.git
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368faacac7
This commit reverts 5aaefa51 (and also partly 7f285f48e77 and b6d75682f9, which were related to the original commit). As landed, 5aaefa51 had unintended consequences on some downstream bots and didn't have proper coverage upstream due to a few subtle things. Implementing this is something we should do in libc++, however we'll first need to address a few issues listed in https://reviews.llvm.org/D106124#3349710. Differential Revision: https://reviews.llvm.org/D120683
50 lines
1.2 KiB
C++
50 lines
1.2 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_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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#endif // _LIBCPP___ALGORITHM_HALF_POSITIVE_H
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