derek.holloway
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63 lines
2.0 KiB
C++
63 lines
2.0 KiB
C++
// -*- 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) 2024 NVIDIA CORPORATION & AFFILIATES.
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCUDACXX___NUMERIC_EXCLUSIVE_SCAN_H
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#define _LIBCUDACXX___NUMERIC_EXCLUSIVE_SCAN_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/std/__functional/operations.h>
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#include <cuda/std/__utility/move.h>
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_LIBCUDACXX_BEGIN_NAMESPACE_STD
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template <class _InputIterator, class _OutputIterator, class _Tp, class _BinaryOp>
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_LIBCUDACXX_HIDE_FROM_ABI constexpr _OutputIterator
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exclusive_scan(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _Tp __init, _BinaryOp __b)
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{
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if (__first != __last)
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{
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_Tp __tmp(__b(__init, *__first));
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while (true)
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{
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*__result = _CUDA_VSTD::move(__init);
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++__result;
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++__first;
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if (__first == __last)
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{
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break;
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}
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__init = _CUDA_VSTD::move(__tmp);
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__tmp = __b(__init, *__first);
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}
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}
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return __result;
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}
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template <class _InputIterator, class _OutputIterator, class _Tp>
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_LIBCUDACXX_HIDE_FROM_ABI constexpr _OutputIterator
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exclusive_scan(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _Tp __init)
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{
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return _CUDA_VSTD::exclusive_scan(__first, __last, __result, __init, _CUDA_VSTD::plus<>());
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}
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_LIBCUDACXX_END_NAMESPACE_STD
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#endif // _LIBCUDACXX___NUMERIC_EXCLUSIVE_SCAN_H
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