---
id: pr-vllm-23809
repo: vllm-project/vllm
pr: 23809
title: '[fix]: add Arm 4bit fused moe support'
author: nikhil-arm
date: '2025-09-24'
url: https://github.com/vllm-project/vllm/pull/23809
source_category: upstream-code
architectures:
- sm100
tags:
- kernel-fusion
- moe
- quantization
techniques:
- kernel-fusion
hardware_features: []
kernel_types:
- moe
- quantization
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 359d2930063038c78b9a54a1b0176fbabb1c204b
inclusion_reason: kernel file changes
changed_paths:
- cmake/cpu_extension.cmake
- csrc/cpu/torch_bindings.cpp
- csrc/moe/dynamic_4bit_int_moe_cpu.cpp
- csrc/ops.h
- vllm/model_executor/layers/fused_moe/cpu_fused_moe.py
- vllm/model_executor/layers/fused_moe/layer.py
- vllm/model_executor/layers/quantization/compressed_tensors/compressed_tensors_moe.py
head_ref_oid: 2b78f5df0a8b6f703dd9ed8c4fb92e7251c52891
artifact_dir: evidence/pull-bundles/vllm/gh-23809
---
# [fix]: add Arm 4bit fused moe support

- Repository: `vllm-project/vllm`
- PR: [23809](https://github.com/vllm-project/vllm/pull/23809)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `cmake/cpu_extension.cmake`
- `csrc/cpu/torch_bindings.cpp`
- `csrc/moe/dynamic_4bit_int_moe_cpu.cpp`
- `csrc/ops.h`
- `vllm/model_executor/layers/fused_moe/cpu_fused_moe.py`
- `vllm/model_executor/layers/fused_moe/layer.py`
- `vllm/model_executor/layers/quantization/compressed_tensors/compressed_tensors_moe.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-23809`
