---
id: pr-cccl-cub-5178
repo: NVIDIA/cccl
pr: 5178
title: Support types with any alignment in UBLKCP transform kernel
author: bernhardmgruber
date: '2025-07-15'
url: https://github.com/NVIDIA/cccl/pull/5178
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- sm100
- sm90
techniques: []
hardware_features:
- blackwell
- hopper
kernel_types: []
languages:
- cuda-cpp
captured_at: '2026-05-16'
status: merged
merge_sha: 3edd25b052558eb11d7dbafe929b979656e15549
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- cub/cub/device/dispatch/dispatch_transform.cuh
- cub/cub/device/dispatch/kernels/transform.cuh
- cub/cub/device/dispatch/tuning/tuning_transform.cuh
artifact_dir: evidence/pull-bundles/cccl-cub/gh-5178
head_ref_oid: bfb3143374aea51a471273556971ae334155ebd3
---
# Support types with any alignment in UBLKCP transform kernel

- Repository: `NVIDIA/cccl`
- PR: [5178](https://github.com/NVIDIA/cccl/pull/5178)
- Decision: `Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.`
- Reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.

## Changed Paths

- `cub/cub/device/dispatch/dispatch_transform.cuh`
- `cub/cub/device/dispatch/kernels/transform.cuh`
- `cub/cub/device/dispatch/tuning/tuning_transform.cuh`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-5178`
