---
id: pr-triton-10190
repo: triton-lang/triton
pr: 10190
title: '[mxfp4] Fix Hopper scale padding mask'
author: hthu
date: '2026-05-04'
url: https://github.com/triton-lang/triton/pull/10190
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- hopper
- matmul
- mxfp4
- tma
techniques:
- async-copy
hardware_features:
- fp4
- hopper
- mxfp4
- tma
kernel_types:
- gemm
languages:
- triton
captured_at: '2026-05-16'
status: merged
merge_sha: 885569ff9e4d0ee5fe41be6ceda6ae99b998ce06
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- python/triton_kernels/tests/test_matmul_details/test_opt_flags_nvidia.py
- python/triton_kernels/triton_kernels/matmul_details/_matmul.py
- python/triton_kernels/triton_kernels/matmul_details/_p_matmul.py
artifact_dir: evidence/pull-bundles/triton/gh-10190
head_ref_oid: 0b72aba11a958b9d2e85cb105c5b3e502ff2d367
---
# [mxfp4] Fix Hopper scale padding mask

- Repository: `triton-lang/triton`
- PR: [10190](https://github.com/triton-lang/triton/pull/10190)
- 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_details/test_opt_flags_nvidia.py`
- `python/triton_kernels/triton_kernels/matmul_details/_matmul.py`
- `python/triton_kernels/triton_kernels/matmul_details/_p_matmul.py`

## Evidence Bundle

`evidence/pull-bundles/triton/gh-10190`
