---
id: pr-cccl-cub-4340
repo: NVIDIA/cccl
pr: 4340
title: Disable extended floating-point types for nvc++
author: fbusato
date: '2025-04-04'
url: https://github.com/NVIDIA/cccl/pull/4340
source_category: upstream-code
architectures:
- sm100
tags:
- fp4
- nvfp4
techniques: []
hardware_features:
- fp4
- nvfp4
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 5452611d48a82f6c72a1fc224c87117badc03dfc
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- libcudacxx/include/cuda/std/__cccl/extended_data_types.h
artifact_dir: evidence/pull-bundles/cccl-cub/gh-4340
head_ref_oid: f2df0e1d516dcd53b1016f497ee89002662a6039
---
# Disable extended floating-point types for nvc++

- Repository: `NVIDIA/cccl`
- PR: [4340](https://github.com/NVIDIA/cccl/pull/4340)
- 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

- `libcudacxx/include/cuda/std/__cccl/extended_data_types.h`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-4340`
