---
id: pr-flashinfer-2217
repo: flashinfer-ai/flashinfer
pr: 2217
title: 'feat: Support unpadded output hidden size for trtllm_fp4_block_scale_moe'
author: elvischenv
date: '2025-12-16'
url: https://github.com/flashinfer-ai/flashinfer/pull/2217
source_category: upstream-code
architectures:
- sm100
tags:
- block-scale
- fp4
- kernel-fusion
- moe
techniques:
- kernel-fusion
hardware_features:
- block-scale
- fp4
kernel_types:
- moe
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 02b4c5a0f35dfdc17564a22d890739f9d7a04058
inclusion_reason: kernel file changes
changed_paths:
- csrc/trtllm_fused_moe_kernel_launcher.cu
- flashinfer/fused_moe/core.py
head_ref_oid: 3f1d187c7f5f5c3f6283bbafd4b5a3f4852b2293
artifact_dir: evidence/pull-bundles/flashinfer/gh-2217
---
# feat: Support unpadded output hidden size for trtllm_fp4_block_scale_moe

- Repository: `flashinfer-ai/flashinfer`
- PR: [2217](https://github.com/flashinfer-ai/flashinfer/pull/2217)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/trtllm_fused_moe_kernel_launcher.cu`
- `flashinfer/fused_moe/core.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-2217`
