backward.h

/* Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License. */

#pragma once

#include <tuple>
#include "paddle/phi/core/meta_tensor.h"
#include "paddle/phi/infermeta/binary.h"
#include "paddle/phi/infermeta/multiary.h"
#include "paddle/phi/infermeta/ternary.h"
#include "paddle/phi/infermeta/unary.h"

namespace phi {

// Common InferMeta Functions for backward operators.
//
// NOTE: The InferMeta Functions in this file are arranged in alphabetic order.

void AffineGridGradInferMeta(const MetaTensor& output_grad,
                             const IntArray& outputShape,
                             bool align_corners,
                             MetaTensor* input_grad);

void AngleGradInferMeta(const MetaTensor& x,
                        const MetaTensor& out_grad,
                        MetaTensor* x_grad);

void BilinearTensorProductGradInferMeta(const MetaTensor& x,
                                        const MetaTensor& y,
                                        const MetaTensor& weight,
                                        const MetaTensor& dout,
                                        MetaTensor* dx,
                                        MetaTensor* dy,
                                        MetaTensor* dweight,
                                        MetaTensor* dbias);

void BmmGradInferMeta(const MetaTensor& x,
                      const MetaTensor& y,
                      const MetaTensor& out_grad,
                      MetaTensor* x_grad,
                      MetaTensor* y_grad);

void ChannelShuffleGradInferMeta(const MetaTensor& out_grad,
                                 int groups,
                                 const std::string& data_format,
                                 MetaTensor* x_grad);

void ComplexGradInferMeta(const MetaTensor& x,
                          const MetaTensor& y,
                          const MetaTensor& dout,
                          MetaTensor* dx,
                          MetaTensor* dy);

void ConvTransposeGradInferMeta(const MetaTensor& x,
                                const MetaTensor& filter,
                                const MetaTensor& dout,
                                const std::vector<int>& strides,
                                const std::vector<int>& paddings,
                                const std::vector<int>& output_padding,
                                const std::vector<int>& output_size,
                                const std::string& padding_algorithm,
                                int groups,
                                const std::vector<int>& dilations,
                                const std::string& data_format,
                                MetaTensor* dx,
                                MetaTensor* dfilter);

void Conv2dTransposeGradInferMeta(const MetaTensor& x,
                                  const MetaTensor& filter,
                                  const MetaTensor& dout,
                                  const std::vector<int>& strides,
                                  const std::vector<int>& paddings,
                                  const std::vector<int>& output_padding,
                                  const IntArray& output_size,
                                  const std::string& padding_algorithm,
                                  int groups,
                                  const std::vector<int>& dilations,
                                  const std::string& data_format,
                                  MetaTensor* dx,
                                  MetaTensor* dfilter);

void Conv2dTransposeDoubleGradInferMeta(const MetaTensor& x,
                                        const MetaTensor& filter,
                                        const MetaTensor& dout,
                                        const MetaTensor& ddx,
                                        const MetaTensor& ddfilter,
                                        const std::vector<int>& strides,
                                        const std::vector<int>& paddings,
                                        const std::vector<int>& output_padding,
                                        const IntArray& output_size,
                                        const std::string& padding_algorithm,
                                        int groups,
                                        const std::vector<int>& dilations,
                                        const std::string& data_format,
                                        MetaTensor* dx,
                                        MetaTensor* dfilter,
                                        MetaTensor* ddout);

void CropGradInferMeta(const MetaTensor& out_grad,
                       const MetaTensor& x,
                       const IntArray& offsets,
                       MetaTensor* x_grad);

void CrossEntropyWithSoftmaxGradInferMeta(const MetaTensor& label,
                                          const MetaTensor& softmax,
                                          const MetaTensor& loss_grad,
                                          bool soft_label,
                                          bool use_softmax,
                                          bool numeric_stable_mode,
                                          int ignore_index,
                                          int axis,
                                          MetaTensor* logits_grad,
                                          MetaConfig config = MetaConfig());

void DeformableConvGradInferMeta(const MetaTensor& x,
                                 const MetaTensor& offset,
                                 const MetaTensor& filter,
                                 const MetaTensor& mask,
                                 const MetaTensor& out_grad,
                                 const std::vector<int>& strides,
                                 const std::vector<int>& paddings,
                                 const std::vector<int>& dilations,
                                 int deformable_groups,
                                 int groups,
                                 int im2col_step,
                                 MetaTensor* dx,
                                 MetaTensor* offset_grad,
                                 MetaTensor* filter_grad,
                                 MetaTensor* mask_grad);

void EigGradInferMeta(const MetaTensor& out_w,
                      const MetaTensor& out_v,
                      const MetaTensor& dout_w,
                      const MetaTensor& dout_v,
                      MetaTensor* dx);

void EigvalshGradInferMeta(const MetaTensor& out_v,
                           const MetaTensor& out_w_grad,
                           const std::string& uplo,
                           bool is_test,
                           MetaTensor* x_grad);

void FFTC2RGradInferMeta(const MetaTensor& x,
                         const std::vector<int64_t>& axes,
                         const std::string& normalization,
                         bool forward,
                         int64_t last_dim_size,
                         MetaTensor* out,
                         MetaConfig = MetaConfig());

void FillDiagonalGradInferMeta(
    const MetaTensor& dout, float value, int offset, bool wrap, MetaTensor* dx);

void FillDiagonalTensorGradInferMeta(const MetaTensor& out_grad,
                                     int64_t offset,
                                     int dim1,
                                     int dim2,
                                     MetaTensor* x_grad);

void GatherNdGradInferMeta(const MetaTensor& x,
                           const MetaTensor& index,
                           const MetaTensor& out_grad,
                           MetaTensor* x_grad);

void GeneralUnaryGradInferMeta(const MetaTensor& x, MetaTensor* dx);

void GeneralBinaryGradInferMeta(const MetaTensor& x,
                                const MetaTensor& y,
                                MetaTensor* dx,
                                MetaTensor* dy);

void GeneralTernaryGradInferMeta(const MetaTensor& x,
                                 const MetaTensor& y,
                                 const MetaTensor& z,
                                 MetaTensor* dx,
                                 MetaTensor* dy,
                                 MetaTensor* dz);

void GeneralQuaternaryGradInferMeta(const MetaTensor& x,
                                    const MetaTensor& y,
                                    const MetaTensor& z,
                                    const MetaTensor& k,
                                    MetaTensor* dx,
                                    MetaTensor* dy,
                                    MetaTensor* dz,
                                    MetaTensor* dk);

void GeneralQuinaryGradInferMeta(const MetaTensor& x,
                                 const MetaTensor& y,
                                 const MetaTensor& z,
                                 const MetaTensor& k,
                                 const MetaTensor& l,
                                 MetaTensor* dx,
                                 MetaTensor* dy,
                                 MetaTensor* dz,
                                 MetaTensor* dk,
                                 MetaTensor* dl);

void GumbelSoftmaxGradInferMeta(const MetaTensor& out,
                                const MetaTensor& dout,
                                int axis,
                                MetaTensor* dx);

void InstanceNormGradInferMeta(const MetaTensor& x,
                               const MetaTensor& scale,
                               const MetaTensor& saved_mean,
                               const MetaTensor& saved_variance,
                               const MetaTensor& y_grad,
                               float epsilon,
                               MetaTensor* x_grad,
                               MetaTensor* scale_grad,
                               MetaTensor* bias_grad);

void InstanceNormDoubleGradInferMeta(const MetaTensor& x,
                                     const MetaTensor& scale,
                                     const MetaTensor& saved_mean,
                                     const MetaTensor& saved_variance,
                                     const MetaTensor& dy,
                                     const MetaTensor& ddx,
                                     const MetaTensor& ddscale,
                                     const MetaTensor& ddbias,
                                     float epsilon,
                                     MetaTensor* dx,
                                     MetaTensor* dscale,
                                     MetaTensor* ddy);

void InverseGradInferMeta(const MetaTensor& out,
                          const MetaTensor& dout,
                          MetaTensor* dx);

void KernelWithXShapeInferMeta(const MetaTensor& xshape, MetaTensor* dx);

void LUGradInferMeta(const MetaTensor& x,
                     const MetaTensor& out,
                     const MetaTensor& pivots,
                     const MetaTensor& out_grad,
                     bool pivot,
                     MetaTensor* x_grad);

void LUUnpackGradInferMeta(const MetaTensor& x,
                           const MetaTensor& pivots,
                           const MetaTensor& l,
                           const MetaTensor& u,
                           const MetaTensor& pmat,
                           const MetaTensor& l_grad,
                           const MetaTensor& u_grad,
                           bool unpack_ludata,
                           bool unpack_pivots,
                           MetaTensor* x_grad);

void MarginCrossEntropyGradInferMeta(const MetaTensor& logits,
                                     const MetaTensor& label,
                                     const MetaTensor& softmax,
                                     const MetaTensor& loss_grad,
                                     bool return_softmax,
                                     int ring_id,
                                     int rank,
                                     int nranks,
                                     float margin1,
                                     float margin2,
                                     float margin3,
                                     float scale,
                                     MetaTensor* logits_grad);

void MaxPoolWithIndexGradInferMeta(const MetaTensor& x,
                                   const MetaTensor& mask,
                                   const MetaTensor& dout,
                                   const std::vector<int>& kernel_size,
                                   const std::vector<int>& strides,
                                   const std::vector<int>& paddings,
                                   bool global_pooling,
                                   bool adaptive,
                                   MetaTensor* dx);

void MeshgridGradInferMeta(const std::vector<const MetaTensor*>& inputs,
                           const std::vector<const MetaTensor*>& outputs_grad,
                           std::vector<MetaTensor*> inputs_grad);

void MultiDotGradInferMeta(const std::vector<const MetaTensor*>& x,
                           const MetaTensor& out_grad,
                           std::vector<MetaTensor*> x_grad);

void MultiplexGradInferMeta(const MetaTensor& ids,
                            const MetaTensor& out_grad,
                            std::vector<MetaTensor*> ins_grad);

void NanmedianGradInferMeta(const MetaTensor& x,
                            const MetaTensor& median_index,
                            const MetaTensor& out_grad,
                            const IntArray& axes,
                            bool keep_dim,
                            MetaTensor* x_grad);

void NllLossGradInferMeta(const MetaTensor& input,
                          const MetaTensor& label,
                          const MetaTensor& weight,
                          const MetaTensor& total_weight,
                          const MetaTensor& out_grad,
                          int64_t ignore_index,
                          const std::string& reduction,
                          MetaTensor* intput_grad,
                          MetaConfig config = MetaConfig());

void PixelUnshuffleGradInferMeta(const MetaTensor& out_grad,
                                 int downscale_factor,
                                 const std::string& data_format,
                                 MetaTensor* x_grad);

void OverlapAddGradInferMeta(const MetaTensor& x,
                             const MetaTensor& out_grad,
                             int hop_length,
                             int axis,
                             MetaTensor* x_grad);

void PsroiPoolGradInferMeta(const MetaTensor& x,
                            const MetaTensor& rois,
                            const MetaTensor& rois_num,
                            const MetaTensor& dout,
                            int pooled_height,
                            int pooled_width,
                            int output_channels,
                            float spatial_scale,
                            MetaTensor* dx);

void RealAndImagGradInferMeta(const MetaTensor& out_grad, MetaTensor* dx);

void ReshapeDoubleGradInferMeta(const MetaTensor& out_grad,
                                const MetaTensor& x_grad_grad,
                                MetaTensor* out_grad_grad);

void RnnGradInferMeta(const MetaTensor& x,
                      const std::vector<const MetaTensor*>& pre_state,
                      const std::vector<const MetaTensor*>& weight_list,
                      MetaTensor* x_grad,
                      std::vector<MetaTensor*> pre_state_grad,
                      std::vector<MetaTensor*> weight_grad_list);

void ScatterGradInferMeta(const MetaTensor& index,
                          const MetaTensor& updates,
                          const MetaTensor& out_grad,
                          bool overwrite,
                          MetaTensor* x_grad,
                          MetaTensor* updates_grad);

void ScatterNdAddGradInferMeta(const MetaTensor& index,
                               const MetaTensor& updates,
                               const MetaTensor& out_grad,
                               MetaTensor* x_grad,
                               MetaTensor* updates_grad);

void SpectralNormGradInferMeta(const MetaTensor& weight,
                               const MetaTensor& u,
                               const MetaTensor& v,
                               const MetaTensor& out_grad,
                               int dim,
                               int power_iters,
                               float eps,
                               MetaTensor* weight_grad);

void StackGradInferMeta(const MetaTensor& out_grad,
                        int axis,
                        std::vector<MetaTensor*> x_grad);

void UniformRandomInplaceGradInferMeta(const MetaTensor& out_grad,
                                       float min,
                                       float max,
                                       int seed,
                                       int diag_num,
                                       int diag_step,
                                       float diag_val,
                                       MetaTensor* x_grad);

void UnStackGradInferMeta(const std::vector<const MetaTensor*>& out_grad,
                          int axis,
                          MetaTensor* x_grad);

void YoloLossGradInferMeta(const MetaTensor& x,
                           const MetaTensor& gt_box,
                           const MetaTensor& gt_label,
                           const MetaTensor& gt_score,
                           const MetaTensor& objectness_mask,
                           const MetaTensor& gt_match_mask,
                           const MetaTensor& loss_grad,
                           const std::vector<int>& anchors,
                           const std::vector<int>& anchor_mask,
                           int class_num,
                           float ignore_thresh,
                           int downsample_ratio,
                           bool use_label_smooth,
                           float scale_x_y,
                           MetaTensor* x_grad,
                           MetaTensor* gt_box_grad,
                           MetaTensor* gt_label_grad,
                           MetaTensor* gt_score_grad);

void IndexAddGradInferMeta(const MetaTensor& index,
                           const MetaTensor& add_value,
                           const MetaTensor& out_grad,
                           int axis,
                           MetaTensor* x_grad,
                           MetaTensor* add_tensor_grad);

}  // namespace phi