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New 1-nn primitive using cutile - #2552
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Unfortunately, when NVIDIA#2547 was merged, the docs had already managed to drift from the code. This commit catches them up.
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Thanks Divye for the PR! Looks good overall, I have only minor comments.
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Looks good, just one small request. I don't need to approve again.
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One last comment and one question:
The cutile zero norm handling looks good. One possible follow-up: the existing Cutlass/SIMT cosine operators still produce non-finite values for zero norms, no? While cuTile and Unfused now return distance 1. Since that behavior predates this PR, I don’t think it needs to block this change, but would it be worth tracking backend consistency separately?
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GTEST_SKIP() inside compute_1nn() only returns from that helper, so the TEST_P body went on to compare() against outputs that were never written and reported spurious failures. On GB10 with driver 580.173.02 cuTile kernel launch is unavailable, so all 12 cuTile-backend NNTest cases (fp32_fused 16-24, fp16_fused 0-1, fp32_fused_i64 0) failed; with the guard they are reported as skipped (42 passed, 12 skipped, 0 failed). Guard in compare() via Test::IsSkipped(). Upstream test from NVIDIA#2552. Assisted-by: Claude
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Relies on #2548. This PR also adds the three ways to do a 1-nn behind a new primitive called
top_1_nn.