---
id: pr-tensorrt-llm-13117
repo: NVIDIA/TensorRT-LLM
pr: 13117
title: '[None][feat] Add FP4 residual quantization kernel without channel reo…'
author: Tracin
date: '2026-04-24'
url: https://github.com/NVIDIA/TensorRT-LLM/pull/13117
source_category: upstream-code
architectures:
- sm100
tags:
- benchmark kernel
- benchmark_test
- cuda kernel
- fp4
- gemm_quant
techniques:
- fine-grained-quantization
hardware_features:
- fp4
- nvfp4
kernel_types:
- gemm
languages:
- cuda-cpp
captured_at: '2026-05-16'
status: merged
merge_sha: c4b8e8e97f4ebf98451adb158e339628ca501757
inclusion_reason: Inspect scale layout, accumulator type, tile/schedule choice, epilogue fusion, and partial-tile guards before deriving a candidate.
changed_paths:
- cpp/tensorrt_llm/kernels/arcquantFP4.cu
- cpp/tensorrt_llm/kernels/arcquantFP4.h
- cpp/tensorrt_llm/thop/fp4Quantize.cpp
- cpp/tensorrt_llm/thop/fp4Quantize.h
- tensorrt_llm/_torch/custom_ops/cpp_custom_ops.py
- tests/unittest/_torch/thop/parallel/test_arcquant_fp4.py
artifact_dir: evidence/pull-bundles/tensorrt-llm/gh-13117
head_ref_oid: f65767db27e4c75ba7d087e59a19fa9bf8204719
---
# [None][feat] Add FP4 residual quantization kernel without channel reo…

- Repository: `NVIDIA/TensorRT-LLM`
- PR: [13117](https://github.com/NVIDIA/TensorRT-LLM/pull/13117)
- Decision: `Inspect scale layout, accumulator type, tile/schedule choice, epilogue fusion, and partial-tile guards before deriving a candidate.`
- Reason: Inspect scale layout, accumulator type, tile/schedule choice, epilogue fusion, and partial-tile guards before deriving a candidate.

## Changed Paths

- `cpp/tensorrt_llm/kernels/arcquantFP4.cu`
- `cpp/tensorrt_llm/kernels/arcquantFP4.h`
- `cpp/tensorrt_llm/thop/fp4Quantize.cpp`
- `cpp/tensorrt_llm/thop/fp4Quantize.h`
- `tensorrt_llm/_torch/custom_ops/cpp_custom_ops.py`
- `tests/unittest/_torch/thop/parallel/test_arcquant_fp4.py`

## Evidence Bundle

`evidence/pull-bundles/tensorrt-llm/gh-13117`
