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// License Agreement
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// For Open Source Computer Vision Library
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// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
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//M*/
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#ifndef OPENCV_CUDA_VEC_DISTANCE_DETAIL_HPP
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#define OPENCV_CUDA_VEC_DISTANCE_DETAIL_HPP
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#include "../datamov_utils.hpp"
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//! @cond IGNORED
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namespace cv { namespace cuda { namespace device
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{
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namespace vec_distance_detail
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{
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template <int THREAD_DIM, int N> struct UnrollVecDiffCached
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{
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template <typename Dist, typename T1, typename T2>
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static __device__ void calcCheck(const T1* vecCached, const T2* vecGlob, int len, Dist& dist, int ind)
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{
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if (ind < len)
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{
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T1 val1 = *vecCached++;
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T2 val2;
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ForceGlob<T2>::Load(vecGlob, ind, val2);
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dist.reduceIter(val1, val2);
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UnrollVecDiffCached<THREAD_DIM, N - 1>::calcCheck(vecCached, vecGlob, len, dist, ind + THREAD_DIM);
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}
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}
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template <typename Dist, typename T1, typename T2>
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static __device__ void calcWithoutCheck(const T1* vecCached, const T2* vecGlob, Dist& dist)
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{
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T1 val1 = *vecCached++;
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T2 val2;
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ForceGlob<T2>::Load(vecGlob, 0, val2);
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vecGlob += THREAD_DIM;
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dist.reduceIter(val1, val2);
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UnrollVecDiffCached<THREAD_DIM, N - 1>::calcWithoutCheck(vecCached, vecGlob, dist);
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}
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};
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template <int THREAD_DIM> struct UnrollVecDiffCached<THREAD_DIM, 0>
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{
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template <typename Dist, typename T1, typename T2>
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static __device__ __forceinline__ void calcCheck(const T1*, const T2*, int, Dist&, int)
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{
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}
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template <typename Dist, typename T1, typename T2>
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static __device__ __forceinline__ void calcWithoutCheck(const T1*, const T2*, Dist&)
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{
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}
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};
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template <int THREAD_DIM, int MAX_LEN, bool LEN_EQ_MAX_LEN> struct VecDiffCachedCalculator;
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template <int THREAD_DIM, int MAX_LEN> struct VecDiffCachedCalculator<THREAD_DIM, MAX_LEN, false>
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{
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template <typename Dist, typename T1, typename T2>
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static __device__ __forceinline__ void calc(const T1* vecCached, const T2* vecGlob, int len, Dist& dist, int tid)
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{
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UnrollVecDiffCached<THREAD_DIM, MAX_LEN / THREAD_DIM>::calcCheck(vecCached, vecGlob, len, dist, tid);
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}
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};
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template <int THREAD_DIM, int MAX_LEN> struct VecDiffCachedCalculator<THREAD_DIM, MAX_LEN, true>
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{
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template <typename Dist, typename T1, typename T2>
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static __device__ __forceinline__ void calc(const T1* vecCached, const T2* vecGlob, int len, Dist& dist, int tid)
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{
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UnrollVecDiffCached<THREAD_DIM, MAX_LEN / THREAD_DIM>::calcWithoutCheck(vecCached, vecGlob + tid, dist);
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}
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};
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} // namespace vec_distance_detail
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}}} // namespace cv { namespace cuda { namespace cudev
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//! @endcond
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#endif // OPENCV_CUDA_VEC_DISTANCE_DETAIL_HPP
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