---
id: pr-cutlass-2480
repo: NVIDIA/cutlass
pr: 2480
title: Feature/add bottom causal mask
author: Aya-ZIbra
date: '2025-09-18'
url: https://github.com/NVIDIA/cutlass/pull/2480
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 64579189ecd323165974f8191c3d4200ef7281bc
inclusion_reason: include
changed_paths:
- examples/77_blackwell_fmha/CMakeLists.txt
- examples/77_blackwell_fmha/collective/fmha_fusion.hpp
artifact_dir: evidence/pull-bundles/cutlass/gh-2480
head_ref_oid: 4b80b75c538a9d7c939f4b119d3cde12e6dec492
---
# Feature/add bottom causal mask

- Repository: `NVIDIA/cutlass`
- PR: [2480](https://github.com/NVIDIA/cutlass/pull/2480)
- Decision: `include`
- Reason: include

## Changed Paths

- `examples/77_blackwell_fmha/CMakeLists.txt`
- `examples/77_blackwell_fmha/collective/fmha_fusion.hpp`

## Evidence Bundle

`evidence/pull-bundles/cutlass/gh-2480`
