ScaNN-derived asymmetric hashing
=================================
The anisotropic asymmetric-hashing objective and 32-lane lookup-table layout
in this directory are adapted from Google ScaNN 1.4.2 at commit
634a79fb5b4b23237a81eac028d27b5d34a5dba4, in particular:
scann/hashes/internal/asymmetric_hashing_impl.cc
Copyright 2020 Google LLC
Licensed under the Apache License, Version 2.0 (the "License"); you may not use
this file except in compliance with the License. The full license text is in
the adjacent `LICENSE-APACHE-2.0` file and is also available at:
https://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed
under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
CONDITIONS OF ANY KIND, either express or implied. See the License for the
specific language governing permissions and limitations under the License.
The hierarchical artifact layout and Hermes streaming-index integration are
Hermes-specific implementations.