48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
|
//===----------------------------------------------------------------------===//
|
||
|
|
//
|
||
|
|
// Part of libcu++, the C++ Standard Library for your entire system,
|
||
|
|
// under the Apache License v2.0 with LLVM Exceptions.
|
||
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
||
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
||
|
|
// SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES.
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
|
||
|
|
#ifndef _CUDA___CMATH_NEG_H
|
||
|
|
#define _CUDA___CMATH_NEG_H
|
||
|
|
|
||
|
|
#include <cuda/std/detail/__config>
|
||
|
|
|
||
|
|
#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
|
||
|
|
# pragma GCC system_header
|
||
|
|
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
|
||
|
|
# pragma clang system_header
|
||
|
|
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
|
||
|
|
# pragma system_header
|
||
|
|
#endif // no system header
|
||
|
|
|
||
|
|
#include <cuda/std/__concepts/concept_macros.h>
|
||
|
|
#include <cuda/std/__type_traits/is_integer.h>
|
||
|
|
#include <cuda/std/__type_traits/make_unsigned.h>
|
||
|
|
|
||
|
|
#include <cuda/std/__cccl/prologue.h>
|
||
|
|
|
||
|
|
_CCCL_BEGIN_NAMESPACE_CUDA
|
||
|
|
|
||
|
|
//! @brief Returns the negative value of the input number
|
||
|
|
//! @param __v The input number
|
||
|
|
//! @return The signed negative value of \p __v
|
||
|
|
//! @note This function doesn't cause undefined behavior when negating the minimum value of a signed integer type.
|
||
|
|
_CCCL_TEMPLATE(class _Tp)
|
||
|
|
_CCCL_REQUIRES(::cuda::std::__cccl_is_integer_v<_Tp>)
|
||
|
|
[[nodiscard]] _CCCL_API constexpr _Tp neg(_Tp __v) noexcept
|
||
|
|
{
|
||
|
|
return static_cast<_Tp>(~::cuda::std::__to_unsigned_like(__v) + 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
_CCCL_END_NAMESPACE_CUDA
|
||
|
|
|
||
|
|
#include <cuda/std/__cccl/epilogue.h>
|
||
|
|
|
||
|
|
#endif // _CUDA___CMATH_NEG_H
|