58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
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//===----------------------------------------------------------------------===//
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//
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// Part of libcu++, the C++ Standard Library for your entire system,
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// 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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// SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES.
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//
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//===----------------------------------------------------------------------===//
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#ifndef _CUDA___CMATH_UABS_H
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#define _CUDA___CMATH_UABS_H
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#include <cuda/std/detail/__config>
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#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
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# pragma GCC system_header
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#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
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# pragma clang system_header
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#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
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# pragma system_header
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#endif // no system header
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#include <cuda/__cmath/neg.h>
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#include <cuda/std/__concepts/concept_macros.h>
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#include <cuda/std/__type_traits/is_integer.h>
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#include <cuda/std/__type_traits/is_signed.h>
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#include <cuda/std/__type_traits/make_unsigned.h>
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#include <cuda/std/__cccl/prologue.h>
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_CCCL_BEGIN_NAMESPACE_CUDA
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//! @brief Returns the *unsigned* absolute value of the given number.
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//! @param __v The input number
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//! @pre \p __v must be an integer type
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//! @return The unsigned absolute value of \p __v
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_CCCL_TEMPLATE(class _Tp)
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_CCCL_REQUIRES(::cuda::std::__cccl_is_cv_integer_v<_Tp>)
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[[nodiscard]] _CCCL_API constexpr ::cuda::std::make_unsigned_t<_Tp> uabs(_Tp __v) noexcept
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{
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if constexpr (::cuda::std::is_signed_v<_Tp>)
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{
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using _Up = ::cuda::std::make_unsigned_t<_Tp>;
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return (__v < _Tp(0)) ? static_cast<_Up>(::cuda::neg(__v)) : static_cast<_Up>(__v);
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}
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else
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{
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return __v;
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}
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}
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_CCCL_END_NAMESPACE_CUDA
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#include <cuda/std/__cccl/epilogue.h>
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#endif // _CUDA___CMATH_UABS_H
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