Point Cloud Library (PCL)  1.14.1-dev
reduce.hpp
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34 * Author: Anatoly Baskeheev, Itseez Ltd, (myname.mysurname@mycompany.com)
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36 
37 #ifndef PCL_GPU_DEVICE_REDUCE_HPP_
38 #define PCL_GPU_DEVICE_REDUCE_HPP_
39 
40 namespace pcl
41 {
42  namespace device
43  {
44  template <unsigned int CTA_SIZE, typename T, typename BinaryFunction>
45  __device__ __forceinline__ void reduce_block(volatile T* data, BinaryFunction op, unsigned int tid = threadIdx.x)
46  {
47  T val = data[tid];
48 
49  //if (CTA_SIZE >= 1024) { if (tid < 512) { data[tid] = val = op(val, data[tdi + 512]); } __syncthreads(); }
50  if (CTA_SIZE >= 512) { if (tid < 256) { data[tid] = val = op(val, data[tid + 256]); } __syncthreads(); }
51  if (CTA_SIZE >= 256) { if (tid < 128) { data[tid] = val = op(val, data[tid + 128]); } __syncthreads(); }
52  if (CTA_SIZE >= 128) { if (tid < 64) { data[tid] = val = op(val, data[tid + 64]); } __syncthreads(); }
53 
54  if (tid < 32)
55  {
56  if (CTA_SIZE >= 64) data[tid] = val = op(val, data[tid + 32]);
57  if (CTA_SIZE >= 32) data[tid] = val = op(val, data[tid + 16]);
58  if (CTA_SIZE >= 16) data[tid] = val = op(val, data[tid + 8]);
59  if (CTA_SIZE >= 8) data[tid] = val = op(val, data[tid + 4]);
60  if (CTA_SIZE >= 4) data[tid] = val = op(val, data[tid + 2]);
61  if (CTA_SIZE >= 2) data[tid] = val = op(val, data[tid + 1]);
62  }
63  };
64  }
65 }
66 
67 
68 #endif
__device__ __forceinline__ void reduce_block(volatile T *data, BinaryFunction op, unsigned int tid=threadIdx.x)
Definition: reduce.hpp:45