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#include "caffe2/operators/negate_gradient_op.h"
namespace caffe2 {
REGISTER_CPU_OPERATOR(NegateGradient, NegateGradientOp<CPUContext>);
OPERATOR_SCHEMA(NegateGradient)
.NumInputs(1)
.NumOutputs(1)
.AllowInplace({{0, 0}})
.SetDoc(R"DOC(
NegagteGradient operator in forward pass simply copies input to the
output, and in backward pass, flips the sign of the output gradient
)DOC");
struct GetNegateGradientGradient : public GradientMakerBase {
using GradientMakerBase::GradientMakerBase;
std::vector<OperatorDef> GetGradientDefs() override {
CAFFE_ENFORCE_EQ(def_.input_size(), 1);
return SingleGradientDef(
"Negative", "", vector<string>{GO(0)}, vector<string>{GI(0)});
}
};
REGISTER_GRADIENT(NegateGradient, GetNegateGradientGradient);
} // namespace caffe2
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