---
id: pr-flashinfer-2644
repo: flashinfer-ai/flashinfer
pr: 2644
title: 'feat: FP32 dtype output for BF16 matmuls (CUTLASS & cuDNN)'
author: raayandhar
date: '2026-03-18'
url: https://github.com/flashinfer-ai/flashinfer/pull/2644
source_category: upstream-code
architectures:
- sm100
tags:
- gemm
techniques: []
hardware_features: []
kernel_types:
- gemm
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: b92da57f6c7fa7f342c1f2e5b6e636bdcc2c61e5
inclusion_reason: kernel file changes
changed_paths:
- benchmarks/routines/gemm.py
- csrc/bf16_gemm_cutlass.cu
- flashinfer/gemm/gemm_base.py
- flashinfer/jit/gemm/core.py
- tests/gemm/test_bmm_bf16.py
- tests/gemm/test_mm_bf16.py
head_ref_oid: 78061e4c37d07f1b797d5502d4ad52aeefd7b71f
artifact_dir: evidence/pull-bundles/flashinfer/gh-2644
---
# feat: FP32 dtype output for BF16 matmuls (CUTLASS & cuDNN)

- Repository: `flashinfer-ai/flashinfer`
- PR: [2644](https://github.com/flashinfer-ai/flashinfer/pull/2644)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `benchmarks/routines/gemm.py`
- `csrc/bf16_gemm_cutlass.cu`
- `flashinfer/gemm/gemm_base.py`
- `flashinfer/jit/gemm/core.py`
- `tests/gemm/test_bmm_bf16.py`
- `tests/gemm/test_mm_bf16.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-2644`
