---
id: pr-vllm-23671
repo: vllm-project/vllm
pr: 23671
title: '[NVIDIA] Support SiluMul + NVFP4 quant fusion'
author: elvischenv
date: '2025-08-28'
url: https://github.com/vllm-project/vllm/pull/23671
source_category: upstream-code
architectures:
- sm100
tags:
- fp4
- kernel-fusion
- nvfp4
- pipeline-stages
- quantization
techniques:
- kernel-fusion
- pipeline-stages
hardware_features:
- fp4
- nvfp4
kernel_types:
- quantization
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 16a45b3a281805ea4d4ff3908cef512fdf6d9f84
inclusion_reason: kernel file changes
changed_paths:
- .buildkite/test-pipeline.yaml
- CMakeLists.txt
- csrc/dispatch_utils.h
- csrc/ops.h
- csrc/quantization/fp4/activation_nvfp4_quant_fusion_kernels.cu
- csrc/torch_bindings.cpp
- tests/compile/test_silu_mul_quant_fusion.py
- tests/kernels/quantization/test_silu_nvfp4_quant_fusion.py
- vllm/compilation/activation_quant_fusion.py
- vllm/compilation/fix_functionalization.py
- vllm/model_executor/layers/quantization/modelopt.py
head_ref_oid: 3061eab209123795ab5ef87c3edc74337cef519b
artifact_dir: evidence/pull-bundles/vllm/gh-23671
---
# [NVIDIA] Support SiluMul + NVFP4 quant fusion

- Repository: `vllm-project/vllm`
- PR: [23671](https://github.com/vllm-project/vllm/pull/23671)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `.buildkite/test-pipeline.yaml`
- `CMakeLists.txt`
- `csrc/dispatch_utils.h`
- `csrc/ops.h`
- `csrc/quantization/fp4/activation_nvfp4_quant_fusion_kernels.cu`
- `csrc/torch_bindings.cpp`
- `tests/compile/test_silu_mul_quant_fusion.py`
- `tests/kernels/quantization/test_silu_nvfp4_quant_fusion.py`
- `vllm/compilation/activation_quant_fusion.py`
- `vllm/compilation/fix_functionalization.py`
- `vllm/model_executor/layers/quantization/modelopt.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-23671`
