experimental kernels for cuda

modules/gpu/src/opencv2/gpu/device/kernels.hpp

+/*M///////////////////////////////////////////////////////////////////////////////////////
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+//M*/
+
+#ifndef __OPENCV_GPU_KENELRS_HPP__
+#define __OPENCV_GPU_KENELRS_HPP__
+
+namespace cv
+{
+	namespace gpu
+	{
+		namespace device
+		{
+			struct Grid1D
+			{
+				static __forceinline__ __device__ int STRIDE() { return  gridDim.x * blockDim.x; }
+				static __forceinline__ __device__ int SHIFT()  { return blockIdx.x * blockDim.x + threadIdx.x; }
+			};
+
+			struct Block1D
+			{
+				static __forceinline__ __device__ int STRIDE() { return blockDim.x; }
+				static __forceinline__ __device__ int SHIFT()  { return threadIdx.x; }			
+			};
+
+			struct Warp
+			{
+				static __forceinline__ __device__ int STRIDE() { return warpSize;            
+				static __forceinline__ __device__ int SHIFT()  { return threadIdx.x & (warpSize - 1); }			
+			};
+
+			template <class Worker, typename T>
+			__forceinline__ __device__ void Copy(const T* in, T *out, int length)
+			{
+				int STRIDE = Worker::STRIDE();
+				int idx    = Worker::SHIFT();				
+				
+				for (; idx < length; idx += STRIDE) 
+	                out[idx] = in[idx];
+			}
+
+			template <class Worker, typename ForwardIterator, typename ForwardIterator>
+			__forceinline__ __device__ void Copy(ForwardIterator beg, ForwardIterator end, OutIter out)
+			{
+				int STRIDE = Worker::STRIDE();
+				int SHIFT  = Worker::SHIFT();
+				
+				beg += SHIFT;
+				out += SHIFT;
+
+				for (; beg < end; beg += STRIDE, out += STRIDE) 
+					*out = *beg;				
+			}		
+
+			 template <class Worker, typename T>
+			__forceinline__ __device__ void Yota(T* out, int beg, int end)
+			{	            				
+				int STRIDE = Worker::STRIDE();
+				int SHIFT  = Worker::SHIFT();
+
+				int idx    = SHIFT;
+				int cur    = beg + SHIFT;
+				int length = end - beg;
+				
+				for (; idx < length; idx += STRIDE, cur += STRIDE)
+					out[idx] = cur;				
+			}
+		}
+	}
+}
+
+#endif /* __OPENCV_GPU_KENELRS_HPP__ */
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