---
id: pr-sglang-5281
repo: sgl-project/sglang
pr: 5281
title: '[1/2] Add FP8 Blockscale MoE CUTLASS kernel for Blackwell'
author: elfiegg
date: '2025-04-23'
url: https://github.com/sgl-project/sglang/pull/5281
source_category: upstream-code
architectures:
- sm100
tags:
- fp8
- moe
techniques: []
hardware_features:
- fp8
kernel_types:
- moe
languages:
- cuda-cpp
- python
captured_at: '2026-04-27'
status: merged
merge_sha: e62c49557dfc5731a46e1565c9cb85bd4d0c568a
inclusion_reason: kernel file changes
changed_paths:
- sgl-kernel/CMakeLists.txt
- sgl-kernel/csrc/common_extension.cc
- sgl-kernel/csrc/moe/cutlass_moe_helper.cu
- sgl-kernel/csrc/moe/fp8_blockwise_moe_kernel.cu
- sgl-kernel/include/sgl_kernel_ops.h
- sgl-kernel/python/sgl_kernel/__init__.py
- sgl-kernel/python/sgl_kernel/moe.py
- sgl-kernel/tests/test_fp8_blockwise_moe.py
head_ref_oid: eabdd52ef477790ce2164b7b8a6f57e2d3e781fb
artifact_dir: evidence/pull-bundles/sglang/gh-5281
---
# [1/2] Add FP8 Blockscale MoE CUTLASS kernel for Blackwell

- Repository: `sgl-project/sglang`
- PR: [5281](https://github.com/sgl-project/sglang/pull/5281)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `sgl-kernel/CMakeLists.txt`
- `sgl-kernel/csrc/common_extension.cc`
- `sgl-kernel/csrc/moe/cutlass_moe_helper.cu`
- `sgl-kernel/csrc/moe/fp8_blockwise_moe_kernel.cu`
- `sgl-kernel/include/sgl_kernel_ops.h`
- `sgl-kernel/python/sgl_kernel/__init__.py`
- `sgl-kernel/python/sgl_kernel/moe.py`
- `sgl-kernel/tests/test_fp8_blockwise_moe.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-5281`
