---
id: pr-flashinfer-1578
repo: flashinfer-ai/flashinfer
pr: 1578
title: 'feat: Support for inferring out_dtype from out.dtype for TRTLLM attention kernel'
author: elvischenv
date: '2025-08-26'
url: https://github.com/flashinfer-ai/flashinfer/pull/1578
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- decode
- prefill
techniques: []
hardware_features: []
kernel_types:
- attention
- decode
- prefill
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: e4bbe7c6683467acc873cc53154d194d4a58eb53
inclusion_reason: semantic match with file changes
changed_paths:
- flashinfer/decode.py
- flashinfer/prefill.py
head_ref_oid: c3d8fde28bcf8cea740f4bcd3830e8651819b1e2
artifact_dir: evidence/pull-bundles/flashinfer/gh-1578
---
# feat: Support for inferring out_dtype from out.dtype for TRTLLM attention kernel

- Repository: `flashinfer-ai/flashinfer`
- PR: [1578](https://github.com/flashinfer-ai/flashinfer/pull/1578)
- Decision: `semantic match with file changes`
- Reason: semantic match with file changes

## Changed Paths

- `flashinfer/decode.py`
- `flashinfer/prefill.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-1578`
