Description

This PR fixes how we detect the 3 in 3hd/h3d layouts when generating the output tensor shape. This only impacts the _qkvpacked functions in te.pytorch.cpp_extensions and only when users directly call those middle-layer APIs.

Fixes #1182.

Type of change

• Documentation change (change only to the documentation, either a fix or a new content)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Infra/Build change
• Code refractor

Changes

Please list the changes introduced in this PR:

• Changed the way we detect 3 in qkvpacked layouts from relying on the value to relying on the location.

Checklist:

• I have read and followed the contributing guidelines
• The functionality is complete
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes