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  * Copyright (c) 2010-2011, Duane Merrill.  All rights reserved.
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 #ifndef HIPCUB_ROCPRIM_WARP_WARP_SCAN_HPP_
 #define HIPCUB_ROCPRIM_WARP_WARP_SCAN_HPP_
  
 #include "../../../config.hpp"
  
 #include "../util_ptx.hpp"
 #include "../thread/thread_operators.hpp"
  
 #include <rocprim/warp/warp_scan.hpp>
  
 BEGIN_HIPCUB_NAMESPACE
  
 template<
     typename T,
     int LOGICAL_WARP_THREADS = HIPCUB_DEVICE_WARP_THREADS,
     int ARCH = HIPCUB_ARCH>
 class WarpScan : private ::rocprim::warp_scan<T, LOGICAL_WARP_THREADS>
 {
     static_assert(LOGICAL_WARP_THREADS > 0, "LOGICAL_WARP_THREADS must be greater than 0");
     using base_type = typename ::rocprim::warp_scan<T, LOGICAL_WARP_THREADS>;
  
     typename base_type::storage_type &temp_storage_;
  
 public:
     using TempStorage = typename base_type::storage_type;
  
     HIPCUB_DEVICE inline
     WarpScan(TempStorage& temp_storage) : temp_storage_(temp_storage)
     {
     }
  
     HIPCUB_DEVICE inline
     void InclusiveSum(T input, T& inclusive_output)
     {
         base_type::inclusive_scan(input, inclusive_output, temp_storage_);
     }
  
     HIPCUB_DEVICE inline
     void InclusiveSum(T input, T& inclusive_output, T& warp_aggregate)
     {
         base_type::inclusive_scan(input, inclusive_output, warp_aggregate, temp_storage_);
     }
  
     HIPCUB_DEVICE inline
     void ExclusiveSum(T input, T& exclusive_output)
     {
         base_type::exclusive_scan(input, exclusive_output, T(0), temp_storage_);
     }
  
     HIPCUB_DEVICE inline
     void ExclusiveSum(T input, T& exclusive_output, T& warp_aggregate)
     {
         base_type::exclusive_scan(input, exclusive_output, T(0), warp_aggregate, temp_storage_);
     }
  
     template<typename ScanOp>
     HIPCUB_DEVICE inline
     void InclusiveScan(T input, T& inclusive_output, ScanOp scan_op)
     {
         base_type::inclusive_scan(input, inclusive_output, temp_storage_, scan_op);
     }
  
     template<typename ScanOp>
     HIPCUB_DEVICE inline
     void InclusiveScan(T input, T& inclusive_output, ScanOp scan_op, T& warp_aggregate)
     {
         base_type::inclusive_scan(
             input, inclusive_output, warp_aggregate,
             temp_storage_, scan_op
         );
     }
  
     template<typename ScanOp>
     HIPCUB_DEVICE inline
     void ExclusiveScan(T input, T& exclusive_output, ScanOp scan_op)
     {
         base_type::inclusive_scan(input, exclusive_output, temp_storage_, scan_op);
         base_type::to_exclusive(exclusive_output, exclusive_output, temp_storage_);
     }
  
     template<typename ScanOp>
     HIPCUB_DEVICE inline
     void ExclusiveScan(T input, T& exclusive_output, T initial_value, ScanOp scan_op)
     {
         base_type::exclusive_scan(
             input, exclusive_output, initial_value,
             temp_storage_, scan_op
         );
     }
  
     template<typename ScanOp>
     HIPCUB_DEVICE inline
     void ExclusiveScan(T input, T& exclusive_output, ScanOp scan_op, T& warp_aggregate)
     {
         base_type::inclusive_scan(
             input, exclusive_output, warp_aggregate, temp_storage_, scan_op
         );
         base_type::to_exclusive(exclusive_output, exclusive_output, temp_storage_);
     }
  
     template<typename ScanOp>
     HIPCUB_DEVICE inline
     void ExclusiveScan(T input, T& exclusive_output, T initial_value, ScanOp scan_op, T& warp_aggregate)
     {
         base_type::exclusive_scan(
             input, exclusive_output, initial_value, warp_aggregate,
             temp_storage_, scan_op
         );
     }
  
     template<typename ScanOp>
     HIPCUB_DEVICE inline
     void Scan(T input, T& inclusive_output, T& exclusive_output, ScanOp scan_op)
     {
         base_type::inclusive_scan(input, inclusive_output, temp_storage_, scan_op);
         base_type::to_exclusive(inclusive_output, exclusive_output, temp_storage_);
     }
  
     template<typename ScanOp>
     HIPCUB_DEVICE inline
     void Scan(T input, T& inclusive_output, T& exclusive_output, T initial_value, ScanOp scan_op)
     {
         base_type::scan(
             input, inclusive_output, exclusive_output, initial_value,
             temp_storage_, scan_op
         );
         // In CUB documentation it's unclear if inclusive_output should include initial_value,
         // however,the implementation includes initial_value in inclusive_output in WarpScan::Scan().
         // In rocPRIM it's not included, and this is a fix to match CUB implementation.
         // After confirmation from CUB's developers we will most probably change rocPRIM too.
         inclusive_output = scan_op(initial_value, inclusive_output);
     }
  
     HIPCUB_DEVICE inline
     T Broadcast(T input, unsigned int src_lane)
     {
         return base_type::broadcast(input, src_lane, temp_storage_);
     }
 };
  
 END_HIPCUB_NAMESPACE
  
 #endif // HIPCUB_ROCPRIM_WARP_WARP_SCAN_HPP_