add failback for Sign operator (#21343)

Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/21343 Needed to binarise features Reviewed By: yinghai Differential Revision: D15625653 fbshipit-source-id: 52f48259a040dac35a7000bb1eea9feb5c7ef1ab

add failback for Sign operator (#21343)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/21343 Needed to binarise features Reviewed By: yinghai Differential Revision: D15625653 fbshipit-source-id: 52f48259a040dac35a7000bb1eea9feb5c7ef1ab
a5cca4d3 · Tim Khatkevich · Facebook Github Bot · 51fb42eb · a5cca4d3
--- a/caffe2/ideep/operators/operator_fallback_ideep.cc
+++ b/caffe2/ideep/operators/operator_fallback_ideep.cc
@@ -199,6 +199,12 @@ REGISTER_IDEEP_OPERATOR(
    Sqrt,
    IDEEPFallbackOp<UnaryElementwiseOp<
      TensorTypes<float>, CPUContext, SqrtFunctor<CPUContext>>>);
+REGISTER_IDEEP_OPERATOR(
+    Sign,
+    IDEEPFallbackOp<UnaryElementwiseOp<
+        TensorTypes<float>,
+        CPUContext,
+        SignFunctor<CPUContext>>>);
 REGISTER_IDEEP_OPERATOR(
    Div,
    IDEEPFallbackOp<BinaryElementwiseOp<