---
id: pr-flashinfer-1573
repo: flashinfer-ai/flashinfer
pr: 1573
title: update trtllm-gen fp4 autotuner and routing
author: IwakuraRein
date: '2025-08-27'
url: https://github.com/flashinfer-ai/flashinfer/pull/1573
source_category: upstream-code
architectures:
- sm100
tags:
- fp4
- kernel-fusion
- moe
techniques:
- kernel-fusion
hardware_features:
- fp4
kernel_types:
- moe
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 8ce1b089088e89f89fae7778d689ebc313477717
inclusion_reason: kernel file changes
changed_paths:
- csrc/trtllm_fused_moe_routing_llama4.cu
- csrc/trtllm_fused_moe_routing_renormalize.cu
- flashinfer/fused_moe/core.py
head_ref_oid: 1816eb839e774330aa3428487c64aad45b54e904
artifact_dir: evidence/pull-bundles/flashinfer/gh-1573
---
# update trtllm-gen fp4 autotuner and routing

- Repository: `flashinfer-ai/flashinfer`
- PR: [1573](https://github.com/flashinfer-ai/flashinfer/pull/1573)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/trtllm_fused_moe_routing_llama4.cu`
- `csrc/trtllm_fused_moe_routing_renormalize.cu`
- `flashinfer/fused_moe/core.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-1573`
