Rewrite grad_op registry macro of mul, sigmoid and softmax

paddle/operators/mul_op.cc

@@ -67,7 +67,7 @@ protected:
 }  // namespace paddle
 
 REGISTER_OP(mul, paddle::operators::MulOp, paddle::operators::MulOpMaker);
-REGISTER_GRADIENT_OP(mul, paddle::operators::MulOpGrad);
+REGISTER_GRADIENT_OP(mul, mul_grad, paddle::operators::MulOpGrad);
 
 REGISTER_OP_CPU_KERNEL(
     mul, paddle::operators::MulKernel<paddle::platform::CPUPlace, float>);

paddle/operators/sigmoid_op.cc

@@ -56,7 +56,7 @@ protected:
 REGISTER_OP(sigmoid,
             paddle::operators::SigmoidOp,
             paddle::operators::SigmoidOpMaker);
-REGISTER_GRADIENT_OP(sigmoid, paddle::operators::SigmoidOpGrad);
+REGISTER_GRADIENT_OP(sigmoid, sigmoid_grad, paddle::operators::SigmoidOpGrad);
 
 REGISTER_OP_CPU_KERNEL(
     sigmoid,

paddle/operators/softmax_op.cc

@@ -59,6 +59,6 @@ protected:
 namespace ops = paddle::operators;
 
 REGISTER_OP(softmax, ops::SoftmaxOp, ops::SoftmaxOpMaker);
-REGISTER_GRADIENT_OP(softmax, paddle::operators::SoftmaxOpGrad);
+REGISTER_GRADIENT_OP(softmax, softmax_grad, paddle::operators::SoftmaxOpGrad);
 REGISTER_OP_CPU_KERNEL(softmax,
                        ops::SoftmaxKernel<paddle::platform::CPUPlace, float>);