---
id: pr-flashinfer-1333
repo: flashinfer-ai/flashinfer
pr: 1333
title: add torch float4_e2m1fn_x2 check for cudnn fp4 backend
author: ttyio
date: '2025-07-25'
url: https://github.com/flashinfer-ai/flashinfer/pull/1333
source_category: upstream-code
architectures:
- sm100
tags:
- fp4
- gemm
techniques: []
hardware_features:
- fp4
kernel_types:
- gemm
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: e38f93c14dc04af49fb66f505967d5bf5d8a1686
inclusion_reason: kernel file changes
changed_paths:
- flashinfer/gemm.py
head_ref_oid: 0dc4b5f952d0de4685b1ec56659aa7917abe5a91
artifact_dir: evidence/pull-bundles/flashinfer/gh-1333
---
# add torch float4_e2m1fn_x2 check for cudnn fp4 backend

- Repository: `flashinfer-ai/flashinfer`
- PR: [1333](https://github.com/flashinfer-ai/flashinfer/pull/1333)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `flashinfer/gemm.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-1333`
