ydb/library/cpp/dot_product/dot_product_vnni.cpp, branch main Mirror of YDB github repos https://code.mastervirt.ru/ydb/atom?h=main 2026-07-09T19:25:51Z Add VNNI int8 dot product fast path 2026-07-09T19:25:51Z mirali777 mirali777@yandex-team.com 2026-07-09T18:46:42Z urn:sha1:b7a0527229fb38319bd9f9a55d9e714c34a63b49 Adds AVX512 VNNI runtime dispatch for signed int8 dot products used by Link HNSW distance calculations, with safe fallback to the existing AVX2/SSE implementations. The signed int8 VNNI path corrects the u8*i8 bias per 64-byte chunk so accumulator semantics stay aligned with the existing int8 DotProduct implementation. Verification: - `ya make -tt library/cpp/dot_product/ut` - `ya make library/cpp/dot_product/bench` - `ya make -r library/cpp/dot_product/bench` - `ya make -tt library/cpp/dot_product/ut --sanitize=address` - `ya make -tt library/cpp/dot_product/ut --sanitize=undefined -F 'TDocProductTestSuite::TestDotProduct8' -F 'TDocProductTestSuite::TestDotProduct8VnniEdges' -F 'TDocProductTestSuite::TestDotProductCharStability'` - `ya make -tt util/system/ut -F TestCpuId` commit_hash:5624243c26df2a9e067e631477f6c3603ef45626