---
id: pr-cccl-cub-7681
repo: NVIDIA/cccl
pr: 7681
title: Fix max atomic size for NVHPC
author: miscco
date: '2026-02-16'
url: https://github.com/NVIDIA/cccl/pull/7681
source_category: upstream-code
architectures:
- sm90
tags:
- sm90
techniques: []
hardware_features:
- hopper
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: eef7ced03677d4a7160b30b6d28d6e9d3c596b83
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- cub/cub/detail/warpspeed/look_ahead.cuh
artifact_dir: evidence/pull-bundles/cccl-cub/gh-7681
head_ref_oid: 5800ef429459090e166ca56d5b17ba69344857a9
---
# Fix max atomic size for NVHPC

- Repository: `NVIDIA/cccl`
- PR: [7681](https://github.com/NVIDIA/cccl/pull/7681)
- 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/detail/warpspeed/look_ahead.cuh`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-7681`
