cub::internal::ThreadScanExclusive

Defined in /home/runner/work/cccl/cccl/cub/cub/thread/thread_scan.cuh

template<int LENGTH, typename T, typename ScanOp>
T cub::internal::ThreadScanExclusive(T *input, T *output, ScanOp scan_op, T prefix, bool apply_prefix = true)

Perform a sequential exclusive prefix scan over LENGTH elements of the input array, seeded with the specified prefix.

The aggregate is returned.

Template Parameters

  • LENGTH – LengthT of input and output arrays

  • T – [inferred] The data type to be scanned.

  • ScanOp – [inferred] Binary scan operator type having member T operator()(const T &a, const T &b)

Parameters

  • input – [in] Input array

  • output – [out] Output array (may be aliased to input)

  • scan_op – [in] Binary scan operator

  • prefix – [in] Prefix to seed scan with

  • apply_prefix – [in] Whether or not the calling thread should apply its prefix. If not, the first output element is undefined. (Handy for preventing thread-0 from applying a prefix.)