---
id: pr-vllm-14383
repo: vllm-project/vllm
pr: 14383
title: Add cutlass support for blackwell fp8 blockwise gemm
author: wenscarl
date: '2025-05-08'
url: https://github.com/vllm-project/vllm/pull/14383
source_category: upstream-code
architectures:
- sm100
tags:
- fp8
- gemm
- quantization
techniques: []
hardware_features:
- fp8
kernel_types:
- gemm
- quantization
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 376786fac1fc50e8d788a39a91fa28d1709ad48b
inclusion_reason: kernel file changes
changed_paths:
- CMakeLists.txt
- csrc/cutlass_extensions/common.hpp
- csrc/quantization/cutlass_w8a8/c3x/scaled_mm_blockwise_sm100_fp8.cu
- csrc/quantization/cutlass_w8a8/c3x/scaled_mm_blockwise_sm100_fp8_dispatch.cuh
- csrc/quantization/cutlass_w8a8/c3x/scaled_mm_helper.hpp
- csrc/quantization/cutlass_w8a8/c3x/scaled_mm_kernels.hpp
- csrc/quantization/cutlass_w8a8/scaled_mm_c3x_sm100.cu
- csrc/quantization/cutlass_w8a8/scaled_mm_c3x_sm90.cu
- csrc/quantization/cutlass_w8a8/scaled_mm_entry.cu
- tests/kernels/quantization/test_cutlass_scaled_mm.py
- vllm/model_executor/layers/quantization/utils/fp8_utils.py
head_ref_oid: b6783dbb1f4c321d8932848ce68d50276a134976
artifact_dir: evidence/pull-bundles/vllm/gh-14383
---
# Add cutlass support for blackwell fp8 blockwise gemm

- Repository: `vllm-project/vllm`
- PR: [14383](https://github.com/vllm-project/vllm/pull/14383)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `CMakeLists.txt`
- `csrc/cutlass_extensions/common.hpp`
- `csrc/quantization/cutlass_w8a8/c3x/scaled_mm_blockwise_sm100_fp8.cu`
- `csrc/quantization/cutlass_w8a8/c3x/scaled_mm_blockwise_sm100_fp8_dispatch.cuh`
- `csrc/quantization/cutlass_w8a8/c3x/scaled_mm_helper.hpp`
- `csrc/quantization/cutlass_w8a8/c3x/scaled_mm_kernels.hpp`
- `csrc/quantization/cutlass_w8a8/scaled_mm_c3x_sm100.cu`
- `csrc/quantization/cutlass_w8a8/scaled_mm_c3x_sm90.cu`
- `csrc/quantization/cutlass_w8a8/scaled_mm_entry.cu`
- `tests/kernels/quantization/test_cutlass_scaled_mm.py`
- `vllm/model_executor/layers/quantization/utils/fp8_utils.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-14383`
