anirudh2290 commented on a change in pull request #12284: [MXNET-853] Fix for
smooth_l1 operator scalar default value
URL: https://github.com/apache/incubator-mxnet/pull/12284#discussion_r215372851
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File path: src/operator/tensor/elemwise_binary_scalar_op_extended.cc
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@@ -98,17 +98,38 @@ where :math:`x` is an element of the tensor *lhs* and
:math:`\sigma` is the scal
Example::
+ smooth_l1([1, 2, 3, 4]) = [0.5, 1.5, 2.5, 3.5]
smooth_l1([1, 2, 3, 4], scalar=1) = [0.5, 1.5, 2.5, 3.5]
)code" ADD_FILELINE)
-.set_attr<FCompute>("FCompute<cpu>", BinaryScalarOp::Compute<
- cpu, mshadow_op::smooth_l1_loss>)
+.set_num_inputs(1)
+.set_num_outputs(1)
+.set_attr_parser([](NodeAttrs* attrs) {
+ if (attrs->dict.find("scalar") != attrs->dict.end())
+ attrs->parsed = std::stod(attrs->dict["scalar"]);
+ else
+ attrs->parsed = 1.0;
+ })
+.set_attr<nnvm::FInferShape>("FInferShape", ElemwiseShape<1, 1>)
+.set_attr<nnvm::FInferType>("FInferType", ElemwiseType<1, 1>)
+.set_attr<nnvm::FInplaceOption>("FInplaceOption",
+ [](const NodeAttrs& attrs){
+ return std::vector<std::pair<int, int> >{{0,
0}};
+ })
+.add_argument("data", "NDArray-or-Symbol", "source input")
+.add_argument("scalar", "float", "scalar input")
+.set_attr<FCompute>("FCompute<cpu>", BinaryScalarOp::Compute<cpu,
mshadow_op::smooth_l1_loss>)
.set_attr<nnvm::FGradient>("FGradient", ElemwiseGradUseIn{
"_backward_smooth_l1" });
MXNET_OPERATOR_REGISTER_BINARY(_backward_smooth_l1)
-.set_attr_parser([](NodeAttrs *attrs) { attrs->parsed =
std::stod(attrs->dict["scalar"]); })
-.set_attr<FCompute>("FCompute<cpu>", BinaryScalarOp::Backward<
- cpu, mshadow_op::smooth_l1_gradient>);
+ .set_attr_parser([](NodeAttrs *attrs) {
+ if (attrs->dict.find("scalar") != attrs->dict.end())
Review comment:
nit: even one line ifs in MXNet codebase are put inside curly braces.
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