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hrx: reuse Q4 row64 tile coordinates in tiled prefill - #190
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This was referenced Nov 9, 2026
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Overview
Pass known tile and local-row coordinates into Q4 row64 header and payload readers for the tiled F32 caller. Register the exact nonzero 46-token fixture using the existing reference helper and tolerances.
This is fix 4/5 in the row64 stack following #181. Stacks on #189; base branch:
users/astgeorg/row64-q6-tile-coordinates. Commit:ea2c36bc1198f754d3686abe1bf6f096fc938e0c. Keep each fix as a separate stacked PR.Validation
Clean committed build and focused Q4/Q6 controls passed. The exact single-Q4 fixture passes its scalar reference and matches the parent byte for byte. Paired-Q4 constant/varied fixtures retain their inherited reference failures with identical outputs.
The complete stack at
bd85479285423b239213519d0892c56d071864dfwas measured against frozen integrationbe335351871563a09520b0db4a63c21db2040807with standalone llama-bench. The final fifteen-model table and separate Qwen3-0.6B stability result are in #181; those combined-stack results are not isolated gains from this commit.Requirements