Open Source Computer Vision Library
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99 lines
3.2 KiB
99 lines
3.2 KiB
/*M/////////////////////////////////////////////////////////////////////////////////////// |
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// |
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING. |
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// |
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// By downloading, copying, installing or using the software you agree to this license. |
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// If you do not agree to this license, do not download, install, |
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// copy or use the software. |
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// |
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// |
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// License Agreement |
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// For Open Source Computer Vision Library |
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// |
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// Copyright (C) 2000-2008, Intel Corporation, all rights reserved. |
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// Copyright (C) 2009, Willow Garage Inc., all rights reserved. |
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// Copyright (C) 2013, OpenCV Foundation, all rights reserved. |
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// Third party copyrights are property of their respective owners. |
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// |
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// Redistribution and use in source and binary forms, with or without modification, |
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// are permitted provided that the following conditions are met: |
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// |
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// * Redistribution's of source code must retain the above copyright notice, |
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// this list of conditions and the following disclaimer. |
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// |
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// * Redistribution's in binary form must reproduce the above copyright notice, |
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// this list of conditions and the following disclaimer in the documentation |
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// and/or other materials provided with the distribution. |
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// |
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// * The name of the copyright holders may not be used to endorse or promote products |
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// derived from this software without specific prior written permission. |
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// |
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// This software is provided by the copyright holders and contributors "as is" and |
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// any express or implied warranties, including, but not limited to, the implied |
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// warranties of merchantability and fitness for a particular purpose are disclaimed. |
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// In no event shall the Intel Corporation or contributors be liable for any direct, |
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// indirect, incidental, special, exemplary, or consequential damages |
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// (including, but not limited to, procurement of substitute goods or services; |
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// loss of use, data, or profits; or business interruption) however caused |
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// and on any theory of liability, whether in contract, strict liability, |
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// or tort (including negligence or otherwise) arising in any way out of |
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// the use of this software, even if advised of the possibility of such damage. |
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// |
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//M*/ |
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#pragma once |
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#ifndef __OPENCV_CUDEV_WARP_SCAN_HPP__ |
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#define __OPENCV_CUDEV_WARP_SCAN_HPP__ |
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#include "../common.hpp" |
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#include "warp.hpp" |
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#include "shuffle.hpp" |
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namespace cv { namespace cudev { |
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template <typename T> |
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__device__ T warpScanInclusive(T data, volatile T* smem, uint tid) |
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{ |
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#if CV_CUDEV_ARCH >= 300 |
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(void) smem; |
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(void) tid; |
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const uint laneId = Warp::laneId(); |
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// scan on shufl functions |
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#pragma unroll |
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for (int i = 1; i <= (WARP_SIZE / 2); i *= 2) |
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{ |
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const T val = shfl_up(data, i); |
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if (laneId >= i) |
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data += val; |
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} |
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return data; |
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#else |
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uint pos = 2 * tid - (tid & (WARP_SIZE - 1)); |
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smem[pos] = 0; |
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pos += WARP_SIZE; |
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smem[pos] = data; |
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smem[pos] += smem[pos - 1]; |
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smem[pos] += smem[pos - 2]; |
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smem[pos] += smem[pos - 4]; |
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smem[pos] += smem[pos - 8]; |
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smem[pos] += smem[pos - 16]; |
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return smem[pos]; |
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#endif |
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} |
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template <typename T> |
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__device__ __forceinline__ T warpScanExclusive(T data, volatile T* smem, uint tid) |
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{ |
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return warpScanInclusive(data, smem, tid) - data; |
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} |
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}} |
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#endif
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