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Remove unused mask operand from Cadence quantized softmax - #21606

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Remove unused mask operand from Cadence quantized softmax#21606
DrJessop wants to merge 2 commits into
pytorch:mainfrom
DrJessop:export-D114967226

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@DrJessop

@DrJessop DrJessop commented Aug 5, 2026

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Summary: Remove the unused mask operand from the quantized softmax schemas, fake and reference implementations, generic and DLA kernel APIs, and tests. Stop materializing a placeholder packed mask in the softmax quantizer pattern. Preserve position-based causal masking through mask_type and pos, and remove the dead DLA mask buffer.

Differential Revision: D114967226

Summary:

The kernel supports masking, need to support it in the reference as well.

Reviewed By: aliafzal

Differential Revision: D114671838
Summary: Remove the unused `mask` operand from the quantized softmax schemas, fake and reference implementations, generic and DLA kernel APIs, and tests. Stop materializing a placeholder packed mask in the softmax quantizer pattern. Preserve position-based causal masking through `mask_type` and `pos`, and remove the dead DLA mask buffer.

Differential Revision: D114967226
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pytorch-bot Bot commented Aug 5, 2026

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🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/21606

Note: Links to docs will display an error until the docs builds have been completed.

❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

❌ 2 New Failures, 3 Cancelled Jobs

As of commit d841c77 with merge base bb6b99a (image):

NEW FAILURES - The following jobs have failed:

  • Cadence Build & Test / hifi-build / hifi4 (gh)
    ##[error]Refusing to check out fork pull request code from a 'pull_request_target' workflow. This workflow runs with the base repository's GITHUB_TOKEN, secrets, default-branch cache scope, and runner access. Fetching and executing a fork's code in that trusted context commonly leads to "pwn request" vulnerabilities. To opt in, review the risks at https://gh.io/securely-using-pull_request_target and set 'allow-unsafe-pr-checkout: true' on the actions/checkout step.
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    ##[error]Refusing to check out fork pull request code from a 'pull_request_target' workflow. This workflow runs with the base repository's GITHUB_TOKEN, secrets, default-branch cache scope, and runner access. Fetching and executing a fork's code in that trusted context commonly leads to "pwn request" vulnerabilities. To opt in, review the risks at https://gh.io/securely-using-pull_request_target and set 'allow-unsafe-pr-checkout: true' on the actions/checkout step.

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@meta-cla meta-cla Bot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Aug 5, 2026
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meta-codesync Bot commented Aug 5, 2026

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@DrJessop has exported this pull request. If you are a Meta employee, you can view the originating Diff in D114967226.

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github-actions Bot commented Aug 5, 2026

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This PR needs a release notes: label

If your change should be included in the release notes (i.e. would users of this library care about this change?), please use a label starting with release notes:. This helps us keep track and include your important work in the next release notes.

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