Implementation of nn.quantized.linear module (#21921)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/21921
Call FBGEMM kernels to implement quantized linear operator. This operator is used only for inference.
Differential Revision: D15375695
fbshipit-source-id: b9ca6c156fd60481fea83e55603b2897f7bfc3eb
