vec_distance_detail.hpp

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#ifndef OPENCV_CUDA_VEC_DISTANCE_DETAIL_HPP




#define OPENCV_CUDA_VEC_DISTANCE_DETAIL_HPP








#include "../datamov_utils.hpp"












namespace

cv
{
namespace
cuda {
namespace
device


{



namespace
vec_distance_detail



{



template
<int
THREAD_DIM,
int
N>
struct
UnrollVecDiffCached



{



template
<typename
Dist,
typename
T1,
typename
T2>



static
__device__
void
calcCheck(const
T1* vecCached,
const
T2* vecGlob,
int
len, Dist& dist,
int
ind)



{



if
(ind < len)



{



T1 val1 = *vecCached++;







T2 val2;



ForceGlob<T2>::Load(vecGlob, ind, val2);







dist.reduceIter(val1, val2);







UnrollVecDiffCached<THREAD_DIM, N - 1>::calcCheck(vecCached, vecGlob, len, dist, ind + THREAD_DIM);



}



}







template
<typename
Dist,
typename
T1,
typename
T2>



static
__device__
void
calcWithoutCheck(const
T1* vecCached,
const
T2* vecGlob, Dist& dist)



{



T1 val1 = *vecCached++;







T2 val2;



ForceGlob<T2>::Load(vecGlob, 0, val2);



vecGlob += THREAD_DIM;







dist.reduceIter(val1, val2);







UnrollVecDiffCached<THREAD_DIM, N - 1>::calcWithoutCheck(vecCached, vecGlob, dist);



}



};



template
<int
THREAD_DIM>
struct
UnrollVecDiffCached<THREAD_DIM, 0>



{



template
<typename
Dist,
typename
T1,
typename
T2>



static
__device__ __forceinline__
void
calcCheck(const
T1*,
const
T2*,
int, Dist&,
int)



{



}







template
<typename
Dist,
typename
T1,
typename
T2>



static
__device__ __forceinline__
void
calcWithoutCheck(const
T1*,
const
T2*, Dist&)



{



}



};







template
<int
THREAD_DIM,
int
MAX_LEN,
bool
LEN_EQ_MAX_LEN>
struct
VecDiffCachedCalculator;



template
<int
THREAD_DIM,
int
MAX_LEN>
struct
VecDiffCachedCalculator<THREAD_DIM, MAX_LEN, false>



{



template
<typename
Dist,
typename
T1,
typename
T2>



static
__device__ __forceinline__
void
calc(const
T1* vecCached,
const
T2* vecGlob,
int
len, Dist& dist,
int
tid)



{



UnrollVecDiffCached<THREAD_DIM, MAX_LEN / THREAD_DIM>::calcCheck(vecCached, vecGlob, len, dist, tid);



}



};



template
<int
THREAD_DIM,
int
MAX_LEN>
struct
VecDiffCachedCalculator<THREAD_DIM, MAX_LEN, true>



{



template
<typename
Dist,
typename
T1,
typename
T2>



static
__device__ __forceinline__
void
calc(const
T1* vecCached,
const
T2* vecGlob,
int
len, Dist& dist,
int
tid)



{



UnrollVecDiffCached<THREAD_DIM, MAX_LEN / THREAD_DIM>::calcWithoutCheck(vecCached, vecGlob + tid, dist);



}



};



}
// namespace vec_distance_detail



}}}
// namespace cv { namespace cuda { namespace cudev












#endif

// OPENCV_CUDA_VEC_DISTANCE_DETAIL_HPP