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-/*M///////////////////////////////////////////////////////////////////////////////////////
-//
-// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
-//
-// By downloading, copying, installing or using the software you agree to this license.
-// If you do not agree to this license, do not download, install,
-// copy or use the software.
-//
-//
-// License Agreement
-// For Open Source Computer Vision Library
-//
-// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
-// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
-// Third party copyrights are property of their respective owners.
-//
-// Redistribution and use in source and binary forms, with or without modification,
-// are permitted provided that the following conditions are met:
-//
-// * Redistribution's of source code must retain the above copyright notice,
-// this list of conditions and the following disclaimer.
-//
-// * Redistribution's 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.
-//
-// * The name of the copyright holders may not 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 the Intel Corporation or contributors 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.
-//
-//M*/
-
-#ifndef OPENCV_GPU_WARP_REDUCE_HPP__
-#define OPENCV_GPU_WARP_REDUCE_HPP__
-
-namespace cv { namespace gpu { namespace device
-{
- template <class T>
- __device__ __forceinline__ T warp_reduce(volatile T *ptr , const unsigned int tid = threadIdx.x)
- {
- const unsigned int lane = tid & 31; // index of thread in warp (0..31)
-
- if (lane < 16)
- {
- T partial = ptr[tid];
-
- ptr[tid] = partial = partial + ptr[tid + 16];
- ptr[tid] = partial = partial + ptr[tid + 8];
- ptr[tid] = partial = partial + ptr[tid + 4];
- ptr[tid] = partial = partial + ptr[tid + 2];
- ptr[tid] = partial = partial + ptr[tid + 1];
- }
-
- return ptr[tid - lane];
- }
-}}} // namespace cv { namespace gpu { namespace device {
-
-#endif /* OPENCV_GPU_WARP_REDUCE_HPP__ */