text: //
  //  @author raver119@gmail.com
  //
  
  #include <ops/declarable/CustomOperations.h>
  
  namespace nd4j {
      namespace ops {
          CONFIGURABLE_OP_IMPL(hardsigmoid, 1, 1, true, 0, 0) {
              auto input = INPUT_VARIABLE(0);
              auto output = OUTPUT_VARIABLE(0);
  
              input->template applyTransform<simdOps::HardSigmoid<T>>(output, nullptr);
              STORE_RESULT(output);
              
              return ND4J_STATUS_OK;
          }
  
          CONFIGURABLE_OP_IMPL(hardsigmoid_bp, 2, 1, true, 0, 0) {
              NDArray<T>* input = INPUT_VARIABLE(0);
              NDArray<T>* epsilon = INPUT_VARIABLE(1);
  
              auto z = OUTPUT_VARIABLE(0);
  
              auto lambda = LAMBDA_TT(_x, _e) {
                  return _e * simdOps::HardSigmoidDerivative<T>::op(_x, nullptr);
              };
  
              input->applyPairwiseLambda(epsilon, lambda, z);  
  
              return ND4J_STATUS_OK;
          }
      }
  }