---
id: pr-triton-10214
repo: triton-lang/triton
pr: 10214
title: Allow MXFP8 LHS with Hopper-swizzled MXFP4 RHS
author: roman-openai
date: '2026-05-07'
url: https://github.com/triton-lang/triton/pull/10214
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- hopper
- matmul
- mxfp4
- triton
- triton kernel
techniques:
- swizzling
hardware_features:
- fp4
- fp8
- hopper
- mxfp4
kernel_types:
- gemm
languages:
- cuda-cpp
- triton
captured_at: '2026-05-16'
status: merged
merge_sha: da6372fde46b77a1e12b9beb1b0321181c913a44
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- python/triton_kernels/tests/test_matmul.py
- python/triton_kernels/triton_kernels/matmul.py
- python/triton_kernels/triton_kernels/matmul_details/_matmul.py
- python/triton_kernels/triton_kernels/matmul_details/_p_matmul.py
- python/triton_kernels/triton_kernels/matmul_details/opt_flags.py
- python/triton_kernels/triton_kernels/matmul_details/opt_flags_details/opt_flags_nvidia.py
artifact_dir: evidence/pull-bundles/triton/gh-10214
head_ref_oid: a33d55e8c991d94b8c1bab3e2adb1ee7dca88f47
---
# Allow MXFP8 LHS with Hopper-swizzled MXFP4 RHS

- Repository: `triton-lang/triton`
- PR: [10214](https://github.com/triton-lang/triton/pull/10214)
- Decision: `Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.`
- Reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.

## Changed Paths

- `python/triton_kernels/tests/test_matmul.py`
- `python/triton_kernels/triton_kernels/matmul.py`
- `python/triton_kernels/triton_kernels/matmul_details/_matmul.py`
- `python/triton_kernels/triton_kernels/matmul_details/_p_matmul.py`
- `python/triton_kernels/triton_kernels/matmul_details/opt_flags.py`
- `python/triton_kernels/triton_kernels/matmul_details/opt_flags_details/opt_flags_nvidia.py`

## Evidence Bundle

`evidence/pull-bundles/triton/gh-10214`
