bugfix:p_norm test=develop

Author: LCStayingdullCircuit

paddle/phi/kernels/gpu/p_norm_grad_kernel.cu

@@ -66,50 +66,6 @@ struct PNormGradFunctor {
   MT eps;
 };
 
-//   template <typename Context,
-//             typename X,
-//             typename Y,
-//             typename DX,
-//             typename DY,
-//             typename Dim>
-//   void operator()(const Context& place,
-//                   X* x,
-//                   Y* y,
-//                   DX* dx,
-//                   DY* dy,
-//                   const Dim& dim,
-//                   int size) {
-//     auto x_mt = x->template cast<MT>();
-//     auto y_mt = y->template cast<MT>();
-//     auto dy_mt = dy->template cast<MT>();
-
-//     auto norm_pow = y_mt.pow(-this->porder);
-//     auto mask_norm_nonzero = (y_mt != static_cast<MT>(0)).template
-//     cast<MT>();
-
-//     // Set to 0 where porder < 0 and x == 0
-//     MT zero = static_cast<MT>(0);
-//     auto mask_x_zero = (x_mt == zero).template cast<MT>();
-
-//     MT is_porder_negative =
-//         this->porder < zero ? static_cast<MT>(1) : static_cast<MT>(0);
-//     auto invalid_mask = (mask_x_zero * is_porder_negative);
-//     auto safe_pow =
-//         x_mt.abs().pow(this->porder) * (static_cast<MT>(1) - invalid_mask);
-
-//     dx->device(place) =
-//         (safe_pow * x_mt.sign() * dy_mt.broadcast(dim) *
-//          norm_pow.broadcast(dim) *
-//          mask_norm_nonzero.broadcast(dim)  // Mask out positions where norm
-//          == 0
-//          )
-//             .template cast<T>();
-//   }
-
-//   MT porder;
-//   MT eps;
-// };
-
 template <typename T, typename Context>
 void PNormGradKernel(const Context& dev_ctx,
                      const DenseTensor& x,