pytorch

fa6b34b5 - 2 Bit Embedding Conversion Operator support. (#43077)

2 Bit Embedding Conversion Operator support. (#43077) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/43077 2 Bit Embedding weight conversion operation is quite similar to 4 bit embedding weight conversion. The diff contains both the 1. 2bit packing op `embedding_bag_2bit_prepack`. 2. 2bit unpacking op `embedding_bag_2bit_unpack`. Comments about the op are inline with the op definition. Test Plan: buck test caffe2/test:quantization -- test_embedding_bag_2bit_unpack Reviewed By: supriyar Differential Revision: D23143262 fbshipit-source-id: fd8877f049ac1f7eb4bc580e588dc95f8b1edef0