---
id: pr-cccl-cub-5314
repo: NVIDIA/cccl
pr: 5314
title: CUB - Add internal integer utils and tests (Split `WarpReduce` PR)
author: fbusato
date: '2025-07-19'
url: https://github.com/NVIDIA/cccl/pull/5314
source_category: upstream-code
architectures:
- sm100
tags:
- arch_pipeline
- benchmark_test
- memory_primitives
- scheduler_autotune
- warp reduce
techniques:
- autotuning
- pipeline-stages
- tile-scheduling
- warp-specialization
hardware_features: []
kernel_types:
- memory
- runtime
- scheduler
languages:
- cuda-cpp
captured_at: '2026-05-16'
status: merged
merge_sha: 17760a39ec462ea53dc93ad6ba9da286d195fdd1
inclusion_reason: 'Transfer primitive policy carefully: coalescing, shared-memory staging, partial tiles, and determinism are part of the contract.'
changed_paths:
- cub/cub/detail/integer_utils.cuh
- cub/test/internal/catch2_test_integer_utils.cu
artifact_dir: evidence/pull-bundles/cccl-cub/gh-5314
head_ref_oid: ec86d54a03786a4f2f6ce2b19b33a819523a10c5
---
# CUB - Add internal integer utils and tests (Split `WarpReduce` PR)

- Repository: `NVIDIA/cccl`
- PR: [5314](https://github.com/NVIDIA/cccl/pull/5314)
- Decision: `Transfer primitive policy carefully: coalescing, shared-memory staging, partial tiles, and determinism are part of the contract.`
- Reason: Transfer primitive policy carefully: coalescing, shared-memory staging, partial tiles, and determinism are part of the contract.

## Changed Paths

- `cub/cub/detail/integer_utils.cuh`
- `cub/test/internal/catch2_test_integer_utils.cu`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-5314`
