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| /****************************************************************************** | |
| * Copyright (c) 2011, Duane Merrill. All rights reserved. | |
| * Copyright (c) 2011-2018, NVIDIA CORPORATION. All rights reserved. | |
| * | |
| * Redistribution and use in source and binary forms, with or without | |
| * modification, are permitted provided that the following conditions are met: | |
| * * Redistributions of source code must retain the above copyright | |
| * notice, this list of conditions and the following disclaimer. | |
| * * Redistributions in binary form must reproduce the above copyright | |
| * notice, this list of conditions and the following disclaimer in the | |
| * documentation and/or other materials provided with the distribution. | |
| * * Neither the name of the NVIDIA CORPORATION nor the | |
| * names of its contributors may be used to endorse or promote products | |
| * derived from this software without specific prior written permission. | |
| * | |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| * DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE FOR ANY | |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| * | |
| ******************************************************************************/ | |
| /** | |
| * \file | |
| * The cub::BlockHistogramAtomic class provides atomic-based methods for constructing block-wide histograms from data samples partitioned across a CUDA thread block. | |
| */ | |
| #pragma once | |
| #include "../../config.cuh" | |
| /// Optional outer namespace(s) | |
| CUB_NS_PREFIX | |
| /// CUB namespace | |
| namespace cub { | |
| /** | |
| * \brief The BlockHistogramAtomic class provides atomic-based methods for constructing block-wide histograms from data samples partitioned across a CUDA thread block. | |
| */ | |
| template <int BINS> | |
| struct BlockHistogramAtomic | |
| { | |
| /// Shared memory storage layout type | |
| struct TempStorage {}; | |
| /// Constructor | |
| __device__ __forceinline__ BlockHistogramAtomic( | |
| TempStorage &temp_storage) | |
| {} | |
| /// Composite data onto an existing histogram | |
| template < | |
| typename T, | |
| typename CounterT, | |
| int ITEMS_PER_THREAD> | |
| __device__ __forceinline__ void Composite( | |
| T (&items)[ITEMS_PER_THREAD], ///< [in] Calling thread's input values to histogram | |
| CounterT histogram[BINS]) ///< [out] Reference to shared/device-accessible memory histogram | |
| { | |
| // Update histogram | |
| #pragma unroll | |
| for (int i = 0; i < ITEMS_PER_THREAD; ++i) | |
| { | |
| atomicAdd(histogram + items[i], 1); | |
| } | |
| } | |
| }; | |
| } // CUB namespace | |
| CUB_NS_POSTFIX // Optional outer namespace(s) | |