---
id: pr-flashinfer-1221
repo: flashinfer-ai/flashinfer
pr: 1221
title: Enable cudnn decode and add tests for the cudnn decode kernel
author: Anerudhan
date: '2025-07-08'
url: https://github.com/flashinfer-ai/flashinfer/pull/1221
source_category: upstream-code
architectures:
- sm100
tags:
- decode
techniques: []
hardware_features: []
kernel_types:
- decode
languages:
- cuda-cpp
captured_at: '2026-04-17'
status: merged
merge_sha: 9157d0514fc251178e98877b4595c701ee8fb482
inclusion_reason: kernel file changes
changed_paths:
- csrc/cudnn_sdpa_kernel_launcher.cu
- flashinfer/cudnn/decode.py
- tests/test_cudnn_decode.py
head_ref_oid: 1d07efded135a1f3b87b246d6badf379f8614942
artifact_dir: evidence/pull-bundles/flashinfer/gh-1221
---
# Enable cudnn decode and add tests for the cudnn decode kernel

- Repository: `flashinfer-ai/flashinfer`
- PR: [1221](https://github.com/flashinfer-ai/flashinfer/pull/1221)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/cudnn_sdpa_kernel_launcher.cu`
- `flashinfer/cudnn/decode.py`
- `tests/test_cudnn_decode.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-1221`
