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reduce.hpp
/*
* Software License Agreement (BSD License)
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* Copyright (c) 2011, Willow Garage, Inc.
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* Author: Anatoly Baskeheev, Itseez Ltd, (myname.mysurname@mycompany.com)
*/
#ifndef PCL_GPU_DEVICE_REDUCE_HPP_
#define PCL_GPU_DEVICE_REDUCE_HPP_
namespace pcl
{
namespace device
{
template <unsigned int CTA_SIZE, typename T, typename BinaryFunction>
__device__ __forceinline__ void reduce_block(volatile T* data, BinaryFunction op, unsigned int tid = threadIdx.x)
{
T val = data[tid];
//if (CTA_SIZE >= 1024) { if (tid < 512) { data[tid] = val = op(val, data[tdi + 512]); } __syncthreads(); }
if (CTA_SIZE >= 512) { if (tid < 256) { data[tid] = val = op(val, data[tid + 256]); } __syncthreads(); }
if (CTA_SIZE >= 256) { if (tid < 128) { data[tid] = val = op(val, data[tid + 128]); } __syncthreads(); }
if (CTA_SIZE >= 128) { if (tid < 64) { data[tid] = val = op(val, data[tid + 64]); } __syncthreads(); }
if (tid < 32)
{
if (CTA_SIZE >= 64) data[tid] = val = op(val, data[tid + 32]);
if (CTA_SIZE >= 32) data[tid] = val = op(val, data[tid + 16]);
if (CTA_SIZE >= 16) data[tid] = val = op(val, data[tid + 8]);
if (CTA_SIZE >= 8) data[tid] = val = op(val, data[tid + 4]);
if (CTA_SIZE >= 4) data[tid] = val = op(val, data[tid + 2]);
if (CTA_SIZE >= 2) data[tid] = val = op(val, data[tid + 1]);
}
};
}
}
#endif
pcl::device::reduce_block
__device__ __forceinline__ void reduce_block(volatile T *data, BinaryFunction op, unsigned int tid=threadIdx.x)
Definition reduce.hpp:45
pcl
Definition convolution.h:46