Add Code Generation for operators, op makers and argument mapping functions (#41772)

Add Code Generation for operators,  op makers and argument mapping functions (#41772)

paddle/fluid/eager/auto_code_generator/final_state_generator/CMakeLists.txt

-set(api_yaml_path "${PADDLE_SOURCE_DIR}/python/paddle/utils/code_gen/api.yaml,${PADDLE_SOURCE_DIR}/python/paddle/utils/code_gen/sparse_api.yaml")
-set(backward_yaml_path "${PADDLE_SOURCE_DIR}/python/paddle/utils/code_gen/backward.yaml,${PADDLE_SOURCE_DIR}/python/paddle/utils/code_gen/sparse_bw_api.yaml")
+set(api_yaml_path "${PADDLE_SOURCE_DIR}/python/paddle/utils/code_gen/api.yaml,${PADDLE_SOURCE_DIR}/python/paddle/utils/code_gen/new_api.yaml,${PADDLE_SOURCE_DIR}/python/paddle/utils/code_gen/sparse_api.yaml")
+set(backward_yaml_path "${PADDLE_SOURCE_DIR}/python/paddle/utils/code_gen/backward.yaml,${PADDLE_SOURCE_DIR}/python/paddle/utils/code_gen/new_backward.yaml,${PADDLE_SOURCE_DIR}/python/paddle/utils/code_gen/sparse_bw_api.yaml")
 set(tmp_forwards_cc_path "${PADDLE_SOURCE_DIR}/paddle/fluid/eager/api/generated/eager_generated/forwards/tmp_dygraph_functions.cc")
 set(tmp_forwards_h_path "${PADDLE_SOURCE_DIR}/paddle/fluid/eager/api/generated/eager_generated/forwards/tmp_dygraph_functions.h")
 set(tmp_nodes_cc_path "${PADDLE_SOURCE_DIR}/paddle/fluid/eager/api/generated/eager_generated/backwards/tmp_nodes.cc")

paddle/fluid/eager/auto_code_generator/final_state_generator/codegen_utils.py

@@ -63,22 +63,24 @@ def AssertMessage(lhs_str, rhs_str):
 
 def ReadFwdFile(filepath):
     f = open(filepath, 'r')
+    # empty file loaded by yaml is None
     contents = yaml.load(f, Loader=yaml.FullLoader)
     f.close()
-    return contents
+    return contents if contents is not None else []
 
 
 def ReadBwdFile(filepath):
     f = open(filepath, 'r')
     contents = yaml.load(f, Loader=yaml.FullLoader)
     ret = {}
-    for content in contents:
-        assert 'backward_api' in content.keys(), AssertMessage('backward_api',
-                                                               content.keys())
-        if 'backward_api' in content.keys():
-            api_name = content['backward_api']
-
-        ret[api_name] = content
+    if contents is not None:
+        for content in contents:
+            assert 'backward_api' in content.keys(), AssertMessage(
+                'backward_api', content.keys())
+            if 'backward_api' in content.keys():
+                api_name = content['backward_api']
+
+            ret[api_name] = content
     f.close()
     return ret
 
@@ -207,6 +209,8 @@ def ParseYamlArgs(string):
 
         assert arg_type in yaml_types_mapping.keys(
         ), f"The argument type {arg_type} in yaml config is not supported in yaml_types_mapping."
+        if arg_type in ["DataType", "DataLayout"] and default_value is not None:
+            default_value = f"paddle::experimental::{default_value}"
         arg_type = yaml_types_mapping[arg_type]
 
         arg_name = RemoveSpecialSymbolsInName(arg_name)

paddle/phi/api/lib/CMakeLists.txt

@@ -13,6 +13,7 @@ set(api_gen_base ${CMAKE_SOURCE_DIR}/python/paddle/utils/code_gen/api_base.py)
 # forward api file
 set(api_gen_file ${CMAKE_SOURCE_DIR}/python/paddle/utils/code_gen/api_gen.py)
 set(api_yaml_file ${CMAKE_SOURCE_DIR}/python/paddle/utils/code_gen/api.yaml)
+set(new_api_yaml_file ${CMAKE_SOURCE_DIR}/python/paddle/utils/code_gen/new_api.yaml)
 set(api_header_file ${CMAKE_SOURCE_DIR}/paddle/phi/api/include/api.h)
 set(api_source_file ${CMAKE_SOURCE_DIR}/paddle/phi/api/lib/api.cc)
 set(api_header_file_tmp ${api_header_file}.tmp)
@@ -21,6 +22,7 @@ set(api_source_file_tmp ${api_source_file}.tmp)
 # backward api file
 set(bw_api_gen_file ${CMAKE_SOURCE_DIR}/python/paddle/utils/code_gen/backward_api_gen.py)
 set(bw_api_yaml_file ${CMAKE_SOURCE_DIR}/python/paddle/utils/code_gen/backward.yaml)
+set(new_bw_api_yaml_file ${CMAKE_SOURCE_DIR}/python/paddle/utils/code_gen/new_backward.yaml)
 set(bw_api_header_file ${CMAKE_SOURCE_DIR}/paddle/phi/api/backward/backward_api.h)
 set(bw_api_source_file ${CMAKE_SOURCE_DIR}/paddle/phi/api/lib/backward_api.cc)
 set(bw_api_header_file_tmp ${bw_api_header_file}.tmp)
@@ -59,7 +61,6 @@ set(strings_api_source_file_tmp ${strings_api_source_file}.tmp)
 
 # wrapped infermeta file
 set(wrapped_infermeta_gen_file ${CMAKE_SOURCE_DIR}/python/paddle/utils/code_gen/wrapped_infermeta_gen.py)
-set(api_yaml_file ${CMAKE_SOURCE_DIR}/python/paddle/utils/code_gen/api.yaml)
 set(wrapped_infermeta_header_file ${CMAKE_SOURCE_DIR}/paddle/phi/infermeta/generated.h)
 set(wrapped_infermeta_source_file ${CMAKE_SOURCE_DIR}/paddle/phi/infermeta/generated.cc)
 
@@ -67,12 +68,106 @@ if (NOT PYTHON_EXECUTABLE)
   find_package(PythonInterp REQUIRED)
 endif()
 
+# install extra dependencies
+execute_process(
+  COMMAND ${PYTHON_EXECUTABLE} -m pip install -U pyyaml jinja2
+)
+
+# parse apis
+set(parsed_api_dir ${CMAKE_SOURCE_DIR}/python/paddle/utils/code_gen/parsed_apis)
+set(generated_op_path ${CMAKE_SOURCE_DIR}/paddle/fluid/operators/generated_op.cc)
+set(generated_argument_mapping_path ${CMAKE_SOURCE_DIR}/paddle/phi/ops/compat/generated_sig.cc)
+message("parse api yamls: 
+- ${api_yaml_file}
+- ${new_api_yaml_file}
+- ${bw_api_yaml_file}
+- ${new_bw_api_yaml_file}")
+execute_process(
+  WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/python/paddle/utils/code_gen
+  COMMAND ${CMAKE_COMMAND} -E make_directory ${parsed_api_dir}
+  COMMAND ${PYTHON_EXECUTABLE} parse_api.py 
+      --api_yaml_path ./api.yaml 
+      --output_path ./parsed_apis/api.parsed.yaml
+  COMMAND ${PYTHON_EXECUTABLE} parse_api.py 
+      --api_yaml_path ./new_api.yaml 
+      --output_path ./parsed_apis/new_api.parsed.yaml
+  COMMAND ${PYTHON_EXECUTABLE} parse_api.py
+      --api_yaml_path ./backward.yaml
+      --output_path ./parsed_apis/backward_api.parsed.yaml
+      --backward
+  COMMAND ${PYTHON_EXECUTABLE} parse_api.py
+      --api_yaml_path ./new_backward.yaml
+      --output_path ./parsed_apis/new_backward_api.parsed.yaml
+      --backward
+  RESULTS_VARIABLE _results
+)
+foreach(_result in ${_results})
+  if (${_result})
+    message(FATAL_ERROR "api yaml parsing failed, exiting.")
+  endif()
+endforeach()
+
+# validation of api yamls
+message("validate api yaml:
+- ${parsed_api_dir}/new_api.parsed.yaml
+- ${parsed_api_dir}/new_backward_api.parsed.yaml")
+execute_process(
+  WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/python/paddle/utils/code_gen
+  COMMAND ${PYTHON_EXECUTABLE} cross_validate.py
+      --forward_yaml_paths ./parsed_apis/api.parsed.yaml ./parsed_apis/new_api.parsed.yaml 
+      --backward_yaml_paths ./parsed_apis/backward_api.parsed.yaml ./parsed_apis/new_backward_api.parsed.yaml
+  RESULT_VARIABLE _result
+)
+if (${_result}) 
+    message(FATAL_ERROR "api validation failed, exiting." )
+endif()
+
+# code generation for op, op makers, and argument mapping functions
+message("create or remove auto-geneated operators: ${generated_op_path}.tmp
+create or remove auto-geneated argument mappings: ${generated_argument_mapping_path}.tmp")
+execute_process(
+  WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/python/paddle/utils/code_gen
+  COMMAND ${PYTHON_EXECUTABLE} generate_op.py
+      --api_yaml_path ./parsed_apis/new_api.parsed.yaml
+      --backward_api_yaml_path ./parsed_apis/new_backward_api.parsed.yaml
+      --output_op_path "${generated_op_path}.tmp"
+      --output_arg_map_path "${generated_argument_mapping_path}.tmp"
+  RESULT_VARIABLE _result
+)
+if (${_result})
+    message(FATAL_ERROR "operator codegen failed, exiting." )
+endif()
+
+
+if(EXISTS "${generated_op_path}.tmp" AND EXISTS "${generated_op_path}")
+  execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different "${generated_op_path}.tmp" "${generated_op_path}")
+  message("copy if different ${generated_op_path}.tmp ${generated_op_path}")
+elseif(EXISTS "${generated_op_path}.tmp")
+  execute_process(COMMAND ${CMAKE_COMMAND} -E copy "${generated_op_path}.tmp" "${generated_op_path}")
+  message("copy ${generated_op_path}.tmp ${generated_op_path}")
+else()
+  execute_process(COMMAND ${CMAKE_COMMAND} -E rm -f "${generated_op_path}")
+  message("remove ${generated_op_path}")
+endif()
+
+
+if(EXISTS "${generated_argument_mapping_path}.tmp" AND EXISTS "${generated_argument_mapping_path}")
+  execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different "${generated_argument_mapping_path}.tmp" "${generated_argument_mapping_path}")
+  message("copy if different ${generated_argument_mapping_path}.tmp ${generated_argument_mapping_path}")
+elseif(EXISTS "${generated_argument_mapping_path}.tmp")
+  execute_process(COMMAND ${CMAKE_COMMAND} -E copy "${generated_argument_mapping_path}.tmp" "${generated_argument_mapping_path}")
+  message("copy ${generated_argument_mapping_path}.tmp ${generated_argument_mapping_path}")
+else()
+  execute_process(COMMAND ${CMAKE_COMMAND} -E rm -f "${generated_argument_mapping_path}")
+  message("remove ${generated_argument_mapping_path}")
+endif()
+
 # generate forward api
 add_custom_command(
   OUTPUT ${api_header_file} ${api_source_file}
   COMMAND ${PYTHON_EXECUTABLE} -m pip install pyyaml
   COMMAND ${PYTHON_EXECUTABLE} ${api_gen_file}
-                 --api_yaml_path ${api_yaml_file}
+                 --api_yaml_path ${api_yaml_file} ${new_api_yaml_file}
                  --api_header_path ${api_header_file_tmp}
                  --api_header_path ${api_header_file_tmp}
                  --api_source_path ${api_source_file_tmp}
@@ -86,7 +181,7 @@ add_custom_command(
 add_custom_command(
   OUTPUT ${bw_api_header_file} ${bw_api_source_file} ${bw_api_header_file_tmp} ${bw_api_source_file_tmp}
   COMMAND ${PYTHON_EXECUTABLE} ${bw_api_gen_file}
-                 --backward_yaml_path ${bw_api_yaml_file}
+                 --backward_yaml_path ${bw_api_yaml_file} ${new_bw_api_yaml_file}
                  --backward_header_path ${bw_api_header_file_tmp}
                  --backward_source_path ${bw_api_source_file_tmp}
   COMMAND ${CMAKE_COMMAND} -E copy_if_different ${bw_api_header_file_tmp} ${bw_api_header_file}
@@ -138,7 +233,7 @@ add_custom_command(
 add_custom_command(
   OUTPUT ${dygraph_api_header_file} ${dygraph_api_source_file}
   COMMAND ${PYTHON_EXECUTABLE} ${im_api_gen_file}
-                 --api_yaml_path ${api_yaml_file}
+                 --api_yaml_path ${api_yaml_file} ${new_api_yaml_file}
                  --sparse_api_yaml_path ${sparse_api_yaml_file}
                  --dygraph_api_header_path ${dygraph_api_header_file_tmp}
                  --dygraph_api_source_path ${dygraph_api_source_file_tmp}
@@ -151,7 +246,7 @@ add_custom_command(
 add_custom_command(
   OUTPUT ${wrapped_infermeta_header_file} ${wrapped_infermeta_source_file}
   COMMAND ${PYTHON_EXECUTABLE} ${wrapped_infermeta_gen_file}
-                 --api_yaml_path ${api_yaml_file}
+                 --api_yaml_path ${api_yaml_file} ${new_api_yaml_file}
                  --wrapped_infermeta_header_path ${wrapped_infermeta_header_file}
                  --wrapped_infermeta_source_path ${wrapped_infermeta_source_file}
   DEPENDS ${api_yaml_file} ${wrapped_infermeta_gen_file} ${api_gen_base}

paddle/phi/common/scalar.h

@@ -27,6 +27,7 @@ template <typename T>
 class ScalarBase {
  public:
   // Constructor support implicit
+  ScalarBase() : ScalarBase(0) {}
   ScalarBase(double val) : dtype_(DataType::FLOAT64) {  // NOLINT
     data_.f64 = val;
   }

python/paddle/utils/code_gen/api.yaml

@@ -812,7 +812,7 @@
     skip_transform : x
 
 - api : gather
-  args : (Tensor x, Tensor index, Scalar axis=0)
+  args : (Tensor x, Tensor index, Scalar(int) axis=0)
   output : Tensor(out)
   infer_meta :
     func : GatherInferMeta
@@ -2021,7 +2021,7 @@
   backward : subtract_grad
 
 - api : sum
-  args : (Tensor x, int64_t[] dims={}, DataType out_dtype=paddle::experimental::DataType::UNDEFINED, bool keep_dim=false)
+  args : (Tensor x, int64_t[] dims={}, DataType out_dtype=DataType::UNDEFINED, bool keep_dim=false)
   output : Tensor(out)
   infer_meta :
     func : SumInferMeta

python/paddle/utils/code_gen/api_gen.py

@@ -222,9 +222,14 @@ namespace experimental {
 
 
 def generate_api(api_yaml_path, header_file_path, source_file_path):
+    apis = []
+
+    for each_api_yaml in api_yaml_path:
+        with open(each_api_yaml, 'r') as f:
+            api_list = yaml.load(f, Loader=yaml.FullLoader)
+            if api_list:
+                apis.extend(api_list)
 
-    with open(api_yaml_path, 'r') as f:
-        apis = yaml.load(f, Loader=yaml.FullLoader)
     header_file = open(header_file_path, 'w')
     source_file = open(source_file_path, 'w')
 
@@ -259,6 +264,7 @@ def main():
     parser.add_argument(
         '--api_yaml_path',
         help='path to api yaml file',
+        nargs='+',
         default='python/paddle/utils/code_gen/api.yaml')
 
     parser.add_argument(

python/paddle/utils/code_gen/backward.yaml

@@ -281,7 +281,6 @@
     param : [grad_x_grad, axis]
   kernel :
     func : concat
-  no_need_buffer : x
 
 - backward_api : concat_grad
   forward : concat (Tensor[] x, Scalar axis) -> Tensor(out)
@@ -507,7 +506,6 @@
     param : [out_grad]
   kernel :
     func : dropout_grad
-  optional : seed_tensor
 
 - backward_api : eigh_grad
   forward : eigh (Tensor x, str uplo) -> Tensor(out_w), Tensor(out_v)
@@ -648,7 +646,6 @@
     data_type: out_grad
     backend: out_grad
     layout: out_grad
-  no_need_buffer : x
 
 - backward_api : flip_grad
   forward : flip (Tensor x, int[] axis) -> Tensor(out)
@@ -866,7 +863,6 @@
     param : [out_grad]
   kernel :
     func : label_smooth_grad
-  optional : prior_dist
 
 - backward_api : layer_norm_grad
   forward : layer_norm (Tensor x, Tensor scale, Tensor bias, float epsilon, int begin_norm_axis, bool is_test) -> Tensor(out), Tensor(mean), Tensor(variance)
@@ -1483,7 +1479,7 @@
   no_need_buffer : grad_out
 
 - backward_api : reshape_grad
-  forward : reshape_with_xshape (Tensor x, IntArray shape) -> Tensor(out), Tensor(xshape)
+  forward : reshape (Tensor x, IntArray shape) -> Tensor(out), Tensor(xshape)
   args : (Tensor xshape, Tensor out_grad)
   output : Tensor(x_grad)
   infer_meta :
@@ -1814,7 +1810,7 @@
   backward : sum_triple_grad
 
 - backward_api : sum_grad
-  forward : sum (Tensor x, int64_t[] dims={}, DataType out_dtype=paddle::experimental::DataType::UNDEFINED, bool keep_dim=false) -> Tensor(out)
+  forward : sum (Tensor x, int64_t[] dims={}, DataType out_dtype=DataType::UNDEFINED, bool keep_dim=false) -> Tensor(out)
   args : (Tensor x, Tensor out_grad, int64_t[] dims, bool keep_dim, bool reduce_all=false)
   output : Tensor(x_grad)
   infer_meta :
@@ -1830,7 +1826,6 @@
   args : (Tensor grad_grad_x, Tensor grad_grad_out_grad, int64_t[] dims={}, bool keep_dim=false, bool reduce_all=false)
   output : Tensor(grad_grad_x_grad)
   invoke : sum_grad(grad_grad_x, grad_grad_out_grad, dims, keep_dim, reduce_all, grad_grad_x_grad)
-  no_need_buffer : x
 
 - backward_api : swish_grad
   forward : swish (Tensor x, float beta=1.0) -> Tensor(out)

python/paddle/utils/code_gen/backward_api_gen.py

@@ -237,8 +237,13 @@ namespace experimental {
 def generate_backward_api(backward_yaml_path, header_file_path,
                           source_file_path):
 
-    with open(backward_yaml_path, 'r') as f:
-        bw_apis = yaml.load(f, Loader=yaml.FullLoader)
+    bw_apis = []
+    for each_api_yaml in backward_yaml_path:
+        with open(each_api_yaml, 'r') as f:
+            api_list = yaml.load(f, Loader=yaml.FullLoader)
+            if api_list:
+                bw_apis.extend(api_list)
+
     header_file = open(header_file_path, 'w')
     source_file = open(source_file_path, 'w')
 
@@ -270,6 +275,7 @@ def main():
     parser.add_argument(
         '--backward_yaml_path',
         help='path to backward yaml file',
+        nargs='+',
         default='python/paddle/utils/code_gen/backward.yaml')
     parser.add_argument(
         '--backward_header_path',

python/paddle/utils/code_gen/cross_validate.py

+# 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.
+
+import argparse
+from itertools import chain
+from pathlib import Path
+
+import yaml
+from parse_utils import cross_validate, to_named_dict
+
+
+def main(forward_api_yaml_paths, backward_api_yaml_paths):
+    apis = {}
+    for api_yaml_path in chain(forward_api_yaml_paths, backward_api_yaml_paths):
+        with open(api_yaml_path, "rt", encoding="utf-8") as f:
+            api_list = yaml.safe_load(f)
+            if api_list is not None:
+                apis.update(to_named_dict((api_list)))
+
+    cross_validate(apis)
+
+
+if __name__ == "__main__":
+    current_dir = Path(__file__).parent / "temp"
+    parser = argparse.ArgumentParser(
+        description="Parse api yaml into canonical format.")
+    parser.add_argument(
+        '--forward_yaml_paths',
+        type=str,
+        nargs='+',
+        default=str(current_dir / "api.parsed.yaml"),
+        help="forward api yaml file.")
+    parser.add_argument(
+        '--backward_yaml_paths',
+        type=str,
+        nargs='+',
+        default=str(current_dir / "backward.yaml.yaml"),
+        help="backward api yaml file.")
+
+    args = parser.parse_args()
+    main(args.forward_yaml_paths, args.backward_yaml_paths)

python/paddle/utils/code_gen/filters.py

+# 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.
+
+from typing import List, Dict
+import re
+
+from jinja2.filters import do_xmlattr
+from type_mapping import (input_types_map, optional_input_types_map,
+                          attr_types_map, opmaker_attr_types_map,
+                          output_type_map)
+from type_mapping import (dense_input_types_map, dense_optional_input_types_map,
+                          dense_output_types_map, sr_input_types_map,
+                          sr_optional_input_types_map, sr_output_types_map,
+                          phi_attr_types_map)
+
+
+# ------------------------------ attr -------------------------------------
+def to_phi_attr_type(s):
+    return phi_attr_types_map[s]
+
+
+def to_op_attr_type(s):
+    return opmaker_attr_types_map[s]
+
+
+def to_paddle_attr_type(s):
+    "Convert type tag for attributes in yaml to c++ types"
+    return attr_types_map[s]
+
+
+# ------------------------------ input ----------------------------------
+def to_paddle_input_type(s, optional=False):
+    "Convert type tag for inputs in yaml to c++ types"
+    if optional:
+        return optional_input_types_map[s]
+    else:
+        return input_types_map[s]
+
+
+def to_dense_input_type(s, optional=False):
+    "Convert types in yaml to dense tensor type in phi"
+    if optional:
+        return dense_input_types_map[s]
+    else:
+        return dense_optional_input_types_map[s]
+
+
+# ------------------------------ output  ----------------------------------
+def to_paddle_output_type(s):
+    return output_type_map[s]
+
+
+def to_dense_output_type(s):
+    "Convert types in yaml to dense tensor type in phi"
+    return dense_output_types_map[s]
+
+
+def to_sr_output_type(s):
+    "Convert types in yaml to selected rows type in phi"
+    return sr_output_types_map[s]
+
+
+# -------------- transform argument names from yaml to opmaker ------------
+def to_opmaker_name(s):
+    if s.endswith("_grad"):
+        return 'GradVarName("{}")'.format(
+            to_pascal_case(s.removesuffix("_grad")))
+    else:
+        return '"{}"'.format(to_pascal_case(s))
+
+
+def to_opmaker_name_cstr(s):
+    if s.endswith("_grad"):
+        return '"{}@GRAD"'.format(to_pascal_case(s.removesuffix("_grad")))
+    else:
+        return '"{}"'.format(to_pascal_case(s))
+
+
+def to_pascal_case(s):
+    words = s.split("_")
+    return "".join([word.capitalize() for word in words])
+
+
+def to_input_name(s):
+    """find input variable name in api yaml for higher order backward api.
+    x -> dx
+    x -> d2x
+    x -> d3x
+    
+    NOTE: for first order backward api
+    x -> x_grad 
+    is more common.
+    """
+    match = re.match(r"(d\d*)(\w+)", s)
+    assert (match.group(1) != ""), "it should be a grad style name."
+    return match.group(2)

python/paddle/utils/code_gen/generate_op.py

+# 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.
+
+import argparse
+import os
+from itertools import chain
+from pathlib import Path
+
+import yaml
+from jinja2 import Environment, FileSystemLoader, StrictUndefined
+
+from filters import to_op_attr_type, to_opmaker_name, to_opmaker_name_cstr, to_pascal_case
+from tests import is_base_api, is_vec, is_scalar, is_initializer_list, supports_inplace, supports_no_need_buffer
+from filters import to_input_name
+from parse_utils import to_named_dict
+
+file_loader = FileSystemLoader(Path(__file__).parent / "templates")
+env = Environment(
+    loader=file_loader,
+    keep_trailing_newline=True,
+    trim_blocks=True,
+    lstrip_blocks=True,
+    undefined=StrictUndefined,
+    extensions=['jinja2.ext.do'])
+env.filters["to_op_attr_type"] = to_op_attr_type
+env.filters["to_opmaker_name"] = to_opmaker_name
+env.filters["to_pascal_case"] = to_pascal_case
+env.filters["to_input_name"] = to_input_name
+env.filters["to_opmaker_name_cstr"] = to_opmaker_name_cstr
+env.tests["base_api"] = is_base_api
+env.tests["vec"] = is_vec
+env.tests["scalar"] = is_scalar
+env.tests["initializer_list"] = is_initializer_list
+env.tests["supports_inplace"] = supports_inplace
+env.tests["supports_no_need_buffer"] = supports_no_need_buffer
+
+
+def main(api_yaml_path, backward_yaml_path, output_op_path,
+         output_arg_map_path):
+    with open(api_yaml_path, "rt") as f:
+        apis = yaml.safe_load(f)
+    forward_api_dict = to_named_dict(apis)
+
+    with open(backward_yaml_path, "rt") as f:
+        backward_apis = yaml.safe_load(f)
+    backward_api_dict = to_named_dict(backward_apis)
+
+    # fill backward field for an api if another api claims it as forward
+    for name, backward_api in backward_api_dict.items():
+        forward_name = backward_api["forward"]["name"]
+        if forward_name in backward_api_dict:
+            forward_api = backward_api_dict[forward_name]
+            if forward_api["backward"] is None:
+                forward_api["backward"] = name
+
+        if forward_name in backward_api_dict:
+            forward_api = backward_api_dict[forward_name]
+            if forward_api["backward"] is None:
+                forward_api["backward"] = name
+
+    api_dict = {}
+    api_dict.update(forward_api_dict)
+    api_dict.update(backward_api_dict)
+
+    if len(apis) == 0 and len(backward_apis) == 0:
+        if os.path.isfile(output_op_path):
+            os.remove(output_op_path)
+        if os.path.isfile(output_arg_map_path):
+            os.remove(output_arg_map_path)
+        return
+
+    op_template = env.get_template('op.c.j2')
+    with open(output_op_path, "wt") as f:
+        msg = op_template.render(
+            apis=apis, backward_apis=backward_apis, api_dict=api_dict)
+        f.write(msg)
+
+    ks_template = env.get_template('ks.c.j2')
+    with open(output_arg_map_path, 'wt') as f:
+        msg = ks_template.render(apis=apis, backward_apis=backward_apis)
+        f.write(msg)
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(
+        description="Generate operator file from api yaml.")
+    parser.add_argument(
+        '--api_yaml_path', type=str, help="parsed api yaml file.")
+    parser.add_argument(
+        '--backward_api_yaml_path',
+        type=str,
+        help="parsed backward api yaml file.")
+    parser.add_argument(
+        "--output_op_path", type=str, help="path to save generated operators.")
+    parser.add_argument(
+        "--output_arg_map_path",
+        type=str,
+        help="path to save generated argument mapping functions.")
+
+    args = parser.parse_args()
+    main(args.api_yaml_path, args.backward_api_yaml_path, args.output_op_path,
+         args.output_arg_map_path)

python/paddle/utils/code_gen/intermediate_api_gen.py

@@ -94,8 +94,12 @@ def generate_intermediate_api(api_yaml_path, sparse_api_yaml_path,
     dygraph_source_file.write(source_include(dygraph_include_header_file))
     dygraph_source_file.write(namespace[0])
 
-    with open(api_yaml_path, 'r') as f:
-        apis = yaml.load(f, Loader=yaml.FullLoader)
+    apis = []
+    for each_api_yaml in api_yaml_path:
+        with open(each_api_yaml, 'r') as f:
+            api_list = yaml.load(f, Loader=yaml.FullLoader)
+            if api_list:
+                apis.extend(api_list)
 
     for api in apis:
         foward_api = ForwardAPI(api)
@@ -131,6 +135,7 @@ def main():
         description='Generate PaddlePaddle C++ Sparse API files')
     parser.add_argument(
         '--api_yaml_path',
+        nargs='+',
         help='path to api yaml file',
         default='python/paddle/utils/code_gen/api.yaml')
 

python/paddle/utils/code_gen/parse_api.py

+# 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.
+
+import argparse
+from pathlib import Path
+
+import yaml
+
+from parse_utils import parse_api_entry
+
+
+def main(api_yaml_path, output_path, backward):
+    with open(api_yaml_path, "rt") as f:
+        apis = yaml.safe_load(f)
+        if apis is None:
+            apis = []
+        else:
+            apis = [
+                parse_api_entry(api, "backward_api" if backward else "api")
+                for api in apis
+            ]
+
+    with open(output_path, "wt") as f:
+        yaml.safe_dump(apis, f, default_flow_style=None, sort_keys=False)
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(
+        description="Parse api yaml into canonical format.")
+    parser.add_argument('--api_yaml_path', type=str, help="api yaml file.")
+    parser.add_argument(
+        "--output_path", type=str, help="path to save parsed yaml file.")
+    parser.add_argument("--backward", action="store_true", default=False)
+
+    args = parser.parse_args()
+    main(args.api_yaml_path, args.output_path, args.backward)

python/paddle/utils/code_gen/parse_utils.py

+# 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.
+
+import re
+import yaml
+from copy import copy
+from typing import Dict, Any, List, Tuple
+from tests import is_attr, is_input, is_output, is_vec
+
+
+def to_named_dict(items: List[Dict]) -> Dict[str, Dict]:
+    named_dict = {}
+    for item in items:
+        if "name" not in item:
+            raise KeyError(f"name not in {item}")
+        name = item["name"]
+        named_dict[name] = item
+    return named_dict
+
+
+def parse_arg(api_name: str, s: str) -> Dict[str, str]:
+    """parse an argument in following formats:
+    1. typename name
+    2. typename name = default_value
+    """
+    typename, rest = [item.strip() for item in s.split(" ", 1)]
+    assert len(
+        typename
+    ) > 0, f"The arg typename should not be empty. Please check the args of {api_name} in yaml."
+
+    assert rest.count(
+        "=") <= 1, f"There is more than 1 = in an arg in {api_name}"
+    if rest.count("=") == 1:
+        name, default_value = [item.strip() for item in rest.split("=", 1)]
+        assert len(
+            name
+        ) > 0, f"The arg name should not be empty. Please check the args of {api_name} in yaml."
+        assert len(
+            default_value
+        ) > 0, f"The default value should not be empty. Please check the args of {api_name} in yaml."
+        return {
+            "typename": typename,
+            "name": name,
+            "default_value": default_value
+        }
+    else:
+        name = rest.strip()
+        assert len(
+            name
+        ) > 0, f"The arg name should not be empty. Please check the args of {api_name} in yaml."
+        return {"typename": typename, "name": name}
+
+
+def parse_input_and_attr(api_name: str,
+                         arguments: str) -> Tuple[List, List, Dict, Dict]:
+    args_str = arguments.strip()
+    assert args_str.startswith('(') and args_str.endswith(')'), \
+        (f"Args declaration should start with '(' and end with ')', "
+         f"please check the args of {api_name} in yaml.")
+    args_str = args_str[1:-1]
+    args = parse_plain_list(args_str)
+
+    inputs = []
+    attrs = []
+
+    met_attr_with_default_value = False
+
+    for arg in args:
+        item = parse_arg(api_name, arg)
+        typename = item["typename"]
+        name = item["name"]
+        if is_input(typename):
+            assert len(attrs) == 0, \
+                (f"The input Tensor should appear before attributes. "
+                f"please check the position of {api_name}:input({name}) "
+                f"in yaml.")
+            inputs.append(item)
+        elif is_attr(typename):
+            if met_attr_with_default_value:
+                assert "default_value" in item, f"{api_name}: Arguments with default value should not precede those without default value"
+            elif "default_value" in item:
+                met_attr_with_default_value = True
+            attrs.append(item)
+        else:
+            raise KeyError(f"{api_name}: Invalid argument type {typename}.")
+    return inputs, attrs
+
+
+def parse_output(api_name: str, s: str) -> Dict[str, str]:
+    """parse an output, typename or typename(name)."""
+    match = re.search(
+        r"(?P<out_type>[a-zA-Z0-9_[\]]+)\s*(?P<name>\([a-zA-Z0-9_@]+\))?\s*(?P<expr>\{[^\}]+\})?",
+        s)
+    typename = match.group("out_type")
+    name = match.group("name")
+    size_expr = match.group("expr")
+
+    name = name[1:-1] if name is not None else 'out'
+    size_expr = size_expr[1:-1] if size_expr is not None else None
+
+    assert is_output(typename), \
+        (f"Invalid output type: {typename} in api: {api_name}."
+            f"Supported types are Tensor and Tensor[]")
+    if size_expr is not None:
+        assert is_vec(typename), \
+            (f"Invalid output size: output {name} in api: {api_name} is "
+             f"not a vector but has size expr")
+        return {"typename": typename, "name": name, "size": size_expr}
+    else:
+        return {"typename": typename, "name": name}
+
+
+def parse_outputs(api_name: str, outputs: str) -> List[Dict]:
+    outputs = parse_plain_list(outputs, sep=",")
+    output_items = []
+    for output in outputs:
+        output_items.append(parse_output(api_name, output))
+    return output_items
+
+
+def parse_infer_meta(infer_meta: Dict[str, Any]) -> Dict[str, Any]:
+    infer_meta = copy(infer_meta)  # to prevent mutating the input
+    if "param" not in infer_meta:
+        infer_meta["param"] = None
+    return infer_meta
+
+
+def parse_candidates(s: str) -> Dict[str, Any]:
+    "parse candidates joined by either '>'(ordered) or ','(unordered)"
+    delimiter = ">" if ">" in s else ","
+    ordered = delimiter == ">"
+    candidates = parse_plain_list(s, delimiter)
+    return {"ordered": ordered, "candidates": candidates}
+
+
+def parse_plain_list(s: str, sep=",") -> List[str]:
+    items = [item.strip() for item in s.strip().split(sep)]
+    return items
+
+
+def parse_kernel(api_name: str,
+                 kernel_config: Dict[str, Any]) -> Dict[str, Any]:
+    # kernel :
+    #    func : [], Kernel functions (example: scale, scale_sr)
+    #    param : [], Input params of kernel
+    #    backend : str, the names of param to choose the kernel backend, default is None
+    #    layout : str, the names of param to choose the kernel layout, default is None
+    #    data_type : str, the names of param to choose the kernel data_type, default is None
+    kernel = {
+        'func': None,  # up to 2 function names
+        'param': None,
+        'backend': None,
+        'layout': None,
+        'data_type': None
+    }
+    kernel['func'] = parse_plain_list(kernel_config['func'])
+    if 'param' in kernel_config:
+        kernel['param'] = kernel_config['param']
+
+    if 'backend' in kernel_config:
+        kernel['backend'] = parse_candidates(kernel_config["backend"])
+
+    if 'layout' in kernel_config:
+        kernel['layout'] = parse_candidates(kernel_config["layout"])
+
+    if 'data_type' in kernel_config:
+        kernel['data_type'] = parse_candidates(kernel_config["data_type"])
+    return kernel
+
+
+def parse_inplace(api_name: str, inplace_cfg: str) -> Dict[str, str]:
+    inplace_map = {}
+    inplace_cfg = inplace_cfg.lstrip("(").rstrip(")")
+    pairs = parse_plain_list(inplace_cfg)
+    for pair in pairs:
+        in_name, out_name = parse_plain_list(pair, sep="->")
+        inplace_map[out_name] = in_name
+    return inplace_map
+
+
+def parse_invoke(api_name: str, invoke_config: str) -> Dict[str, Any]:
+    invoke_config = invoke_config.strip()
+    func, rest = invoke_config.split("(", 1)
+    func = func.strip()
+    args = rest.rstrip(")").strip()
+    invocation = {"func": func, "args": args}
+    return invocation
+
+
+def extract_type_and_name(records: List[Dict]) -> List[Dict]:
+    """extract type and name from forward call, it is simpler than forward api."""
+    extracted = [{
+        "name": item["name"],
+        "typename": item["typename"]
+    } for item in records]
+    return extracted
+
+
+def parse_forward(api_name: str, forward_config: str) -> Dict[str, Any]:
+    # api_name (const Tensor& input, ... , int attr, ...) -> Tensor(out)
+    result = re.search(
+        r"(?P<api>[a-z][a-z0-9_]+)\s*(?P<args>\([^\)]+\))\s*->\s*(?P<outputs>.+)",
+        forward_config)
+    api = result.group("api")
+    outputs = parse_outputs(api_name, result.group("outputs"))
+    outputs = extract_type_and_name(outputs)
+
+    inputs, attrs = parse_input_and_attr(api_name, result.group("args"))
+    inputs = extract_type_and_name(inputs)
+    attrs = extract_type_and_name(attrs)
+    forward_cfg = {
+        "name": api,
+        "inputs": inputs,
+        "attrs": attrs,
+        "outputs": outputs
+    }
+    return forward_cfg
+
+
+def parse_api_entry(api_entry: Dict[str, Any], name_field="api"):
+    api_name = api_entry[name_field]
+    inputs, attrs = parse_input_and_attr(api_name, api_entry["args"])
+    outputs = parse_outputs(api_name, api_entry["output"])
+
+    # validate default value of DataType and DataLayout
+    for attr in attrs:
+        if "default_value" in attr:
+            typename = attr["typename"]
+            default_value = attr["default_value"]
+            if typename == "DataType":
+                assert "DataType" in default_value, f"invalid DataType default value in {api_name}"
+                # remove namespace
+                default_value = default_value[default_value.find("DataType"):]
+                attr["default_value"] = default_value
+            elif typename == "DataLayout":
+                assert "DataLayout" in default_value, f"invalid DataLayout default value in {api_name}"
+                default_value = default_value[default_value.find("DataLayout"):]
+                attr["default_value"] = default_value
+
+    input_names = [item["name"] for item in inputs]
+    attr_names = [item["name"] for item in attrs]
+    output_names = [item["name"] for item in outputs]
+
+    # add optional tag for every input
+    for input in inputs:
+        input["optional"] = False
+    if "optional" in api_entry:
+        optional_args = parse_plain_list(api_entry["optional"])
+        for name in optional_args:
+            assert name in input_names, f"{api_name} has an optional input: '{name}' which is not an input."
+        for input in inputs:
+            if input["name"] in optional_args:
+                input["optional"] = True
+
+    # add intermediate tag for every output
+    for output in outputs:
+        output["intermediate"] = False
+    if "intermediate" in api_entry:
+        intermediate_outs = parse_plain_list(api_entry["intermediate"])
+        for name in intermediate_outs:
+            assert name in output_names, f"{api_name} has an intermediate output: '{name}' which is not an output."
+        for output in outputs:
+            if output["name"] in intermediate_outs:
+                output["intermediate"] = True
+
+    # add no_need_buffer for every input
+    for input in inputs:
+        input["no_need_buffer"] = False
+    if "no_need_buffer" in api_entry:
+        no_buffer_args = parse_plain_list(api_entry["no_need_buffer"])
+        for name in no_buffer_args:
+            assert name in input_names, f"{api_name} has an no buffer input: '{name}' which is not an input."
+        for input in inputs:
+            if input["name"] in no_buffer_args:
+                input["no_need_buffer"] = True
+    else:
+        no_buffer_args = None
+
+    # TODO(chenfeiyu): data_transform
+
+    api = {
+        "name": api_name,
+        "inputs": inputs,
+        "attrs": attrs,
+        "outputs": outputs,
+        "no_need_buffer": no_buffer_args
+    }
+
+    # invokes another api?
+    is_base_api = "invoke" not in api_entry
+
+    if is_base_api:
+        # kernel
+        kernel = parse_kernel(api_name, api_entry["kernel"])
+        if kernel["param"] is None:
+            kernel["param"] = input_names + attr_names
+
+        # infer meta
+        infer_meta = parse_infer_meta(api_entry["infer_meta"])
+        if infer_meta["param"] is None:
+            infer_meta["param"] = copy(kernel["param"])
+
+        # inplace
+        if "inplace" in api_entry:
+            inplace_pairs = parse_inplace(api_name, api_entry["inplace"])
+        else:
+            inplace_pairs = None
+        api.update({
+            "infer_meta": infer_meta,
+            "kernel": kernel,
+            "inplace": inplace_pairs
+        })
+    else:
+        # invoke
+        invoke = parse_invoke(api_name, api_entry["invoke"])
+        api["invoke"] = invoke
+
+    # backward
+    if "backward" in api_entry:
+        backward = api_entry["backward"]
+    else:
+        backward = None
+    api["backward"] = backward
+
+    # forward for backward_apis
+    is_backward_api = name_field == "backward_api"
+    if is_backward_api:
+        if "forward" in api_entry:
+            forward = parse_forward(api_name, api_entry["forward"])
+            # validate_fb
+            validate_backward_inputs(api_name, forward["inputs"],
+                                     forward["outputs"], inputs)
+            validate_backward_attrs(api_name, forward["attrs"], attrs)
+            validate_backward_outputs(api_name, forward["inputs"], outputs)
+        else:
+            forward = None
+        api["forward"] = forward
+    return api
+
+
+def validate_backward_attrs(api, forward_attrs, backward_attrs):
+    if len(forward_attrs) >= len(backward_attrs):
+        return
+    num_exceptional_attrs = len(backward_attrs) - len(forward_attrs)
+    # this is a not-that-clean trick to allow backward api to has more attrs
+    # than the forward api, as long as they all have default value
+    for i in range(-num_exceptional_attrs, 0):
+        assert "default_value" in backward_attrs[
+            i], f"{api} has exceptional attr without default value"
+
+
+def validate_backward_inputs(api, forward_inputs, forward_outputs,
+                             backward_inputs):
+    foward_input_names = [item["name"] for item in forward_inputs]
+    forward_output_names = [item["name"] for item in forward_outputs]
+    backward_input_names = [item["name"] for item in backward_inputs]
+
+    assert len(backward_input_names) <= len(foward_input_names) + 2 * len(
+        forward_output_names), f"{api} has too many inputs."
+
+
+def validate_backward_outputs(api, forward_inputs, backward_outputs):
+    assert len(backward_outputs) <= len(
+        forward_inputs), f"{api} has too many outputs"
+
+
+def cross_validate(apis):
+    for name, api in apis.items():
+        if "forward" in api:
+            fw_call = api["forward"]
+            fw_name = fw_call["name"]
+            if fw_name not in apis:
+                print(
+                    f"Something Wrong here, this backward api({name})'s forward api({fw_name}) does not exist."
+                )
+            else:
+                fw_api = apis[fw_name]
+                if "backward" not in fw_api or fw_api["backward"] is None:
+                    print(
+                        f"Something Wrong here, {name}'s forward api({fw_name}) does not claim {name} as its backward."
+                    )
+                else:
+                    assert fw_api[
+                        "backward"] == name, f"{name}: backward and forward name mismatch"
+
+                assert len(fw_call["inputs"]) <= len(
+                    fw_api["inputs"]
+                ), f"{name}: forward call has more inputs than the api"
+                for (input, input_) in zip(fw_call["inputs"], fw_api["inputs"]):
+                    assert input["typename"] == input_[
+                        "typename"], f"type mismatch in {name} and {fw_name}"
+
+                assert len(fw_call["attrs"]) <= len(
+                    fw_api["attrs"]
+                ), f"{name}: forward call has more attrs than the api"
+                for (attr, attr_) in zip(fw_call["attrs"], fw_api["attrs"]):
+                    if attr["typename"] == "Scalar":
+                        # special case for Scalar, fw_call can omit the type
+                        assert re.match(
+                            r"Scalar(\(\w+\))*", attr_["typename"]
+                        ), f"type mismatch in {name} and {fw_name}"
+                    else:
+                        assert attr["typename"] == attr_[
+                            "typename"], f"type mismatch in {name} and {fw_name}"
+
+                assert len(fw_call["outputs"]) == len(
+                    fw_api["outputs"]
+                ), f"{name}: forward call has more outputs than the api"
+                for (output, output_) in zip(fw_call["outputs"],
+                                             fw_api["outputs"]):
+                    assert output["typename"] == output_[
+                        "typename"], f"type mismatch in {name} and {fw_name}"

python/paddle/utils/code_gen/templates/ks.c.j2

+{% from "operator_utils.c.j2" import name_map, register_name_map %}
+// this file is generated by python/paddle/utils/code_gen/generate_op.py, do not edit.
+#include "paddle/phi/core/compat/op_utils.h"
+#include "paddle/fluid/framework/operator.h"
+#include "paddle/utils/small_vector.h"
+
+namespace phi {
+
+using paddle::framework::GradVarName;
+
+{% for api in apis %}
+  {% if api is base_api %}
+{{name_map(api)}}
+  {% endif %}
+{% endfor %}
+{% for api in backward_apis %}
+  {% if api is base_api %}
+{{name_map(api)}}
+  {% endif %}
+{% endfor %}
+}  // namespace phi
+
+{% for api in apis + backward_apis %}
+  {% if api is base_api %}
+{{register_name_map(api)}}
+  {% endif %}
+{% endfor %}

python/paddle/utils/code_gen/templates/op.c.j2

+{% from "operator_utils.c.j2" import op_maker, backward_op_maker, operator, register_op_with_components %}
+// this file is generated by python/paddle/utils/code_gen/generate_op.py, do not edit.
+#include <string>
+#include "paddle/fluid/framework/infershape_utils.h"
+#include "paddle/fluid/framework/op_registry.h"
+#include "paddle/fluid/framework/convert_utils.h"
+#include "paddle/phi/core/infermeta_utils.h"
+#include "paddle/phi/infermeta/nullary.h"
+#include "paddle/phi/infermeta/unary.h"
+#include "paddle/phi/infermeta/binary.h"
+#include "paddle/phi/infermeta/ternary.h"
+#include "paddle/phi/infermeta/multiary.h"
+#include "paddle/phi/infermeta/backward.cc"
+
+namespace paddle {
+namespace operators {
+
+using paddle::framework::GradVarName;
+
+{% for api in apis %}
+  {% if api is base_api %}
+
+{{op_maker(api)}}
+
+{{operator(api)}}
+  {% endif %}
+{% endfor %}
+
+{% for api in backward_apis %}
+  {% if api is base_api %}
+
+{{backward_op_maker(api, api_dict[api["forward"]["name"]])}}
+
+{{operator(api)}}
+  {% endif %}
+{% endfor %}
+}  // namespace operators
+}  // namespace paddle
+
+namespace ops = paddle::operators;
+{% for api in apis + backward_apis %}
+{% if api is base_api %}
+{{register_op_with_components(api)}}
+{% endif %}
+{% endfor %}

python/paddle/utils/code_gen/templates/operator_utils.c.j2

+{# ----------------------------- op maker ----------------------------------- #}
+{% macro op_maker(api) %}
+  {% set api_name = api["name"] %}
+class {{api_name | to_pascal_case}}OpMaker : public framework::OpProtoAndCheckerMaker {
+ public:
+  void Make() override {
+  {% filter indent(4, True) %}
+    {% for input in api["inputs"] %}
+      {% if input["name"] in api["kernel"]["param"] %}
+{{add_input(loop.index0, input, api_name)}};
+      {% endif %}
+    {% endfor %}
+    {% for output in api["outputs"] %}
+{{add_output(loop.index0, output, api_name)}};
+    {% endfor %}
+    {% for attr in api["attrs"] %}
+      {% if attr["name"] in api["kernel"]["param"] %}
+{{add_attr(loop.index0, attr, api_name)}};
+      {% endif %}
+    {% endfor %}
+  {% endfilter %}
+    AddComment(R"DOC(
+TODO: Documentation of {{api_name}} op.
+)DOC");
+  }
+};
+{% endmacro %}
+
+
+{# add input, it could be duplicable or dispensable #}
+{% macro add_input(i, input, op_name) %}{# inline #}
+  {% set name = input["name"] %}
+  {% set typename = input["typename"] %}
+AddInput({{name| to_opmaker_name}}, "({{typename}}), input {{i}} of {{op_name}} op.")
+  {%- if typename is vec +%}
+    .AsDuplicable()
+  {%- endif %}
+  {%- if input["optional"] +%}
+    .AsDispensable()
+  {%- endif %}
+{%- endmacro %}
+
+{# add output, it could be duplicable or intermediate, however, optional output is not supported #}
+{% macro add_output(i, output, op_name) %}{# inline #}
+  {% set name = output["name"] %}
+  {% set typename = output["typename"] %}
+  {% set is_intermediate = output["intermediate"] %}
+AddOutput({{name | to_opmaker_name}}, "({{typename}}), output {{i}} of {{op_name}} op.")
+  {%- if typename is vec +%}
+    .AsDuplicable()
+  {%- endif %}
+  {%- if is_intermediate +%}
+    .AsIntermediate()
+  {%- endif %}
+{%- endmacro %}
+
+{# add attribute, and process default value if needed #}
+{% macro add_attr(i, attr, op_name) %}{# inline #}
+  {% set name = attr["name"] %}
+  {% set typename = attr["typename"] %}
+  {% if typename is scalar %}
+AddInput("{{name | to_pascal_case}}Tensor", "attribute {{i}} for {{op_name}} op from 0D Tensor.")
+    .AsDispensable();
+  {% elif typename == "IntArray" %}{# the type has been renamed #}
+AddInput("{{name | to_pascal_case}}Tensor", "attribute {{i}} for {{op_name}} op from 1D integer Tensor.")
+    .AsDispensable();
+AddInput("{{name | to_pascal_case}}TensorList", "attribute {{i}} for {{op_name}} op from list fo 0D integer Tensors.")
+    .AsDuplicable()
+    .AsDispensable();
+  {% endif %}
+AddAttr<{{typename | to_op_attr_type}}>("{{name}}", "({{typename | to_op_attr_type}}), attribute {{i}} for {{op_name}} op.")
+  {%- if "default_value" in attr +%}
+    .SetDefault({{process_default_value(attr)}})
+  {%- endif %}
+{%- endmacro %}
+
+{# process default value for attributes, some attribute has different types and different default values in api & opmaker #}
+{% macro process_default_value(attr) %}{# inline #}
+  {% set default_value = attr["default_value"] %}
+  {% set typename = attr["typename"] %}
+  {% if typename == "DataType" %}{# convert back to VarType #}
+static_cast<int>(framework::TransToProtoVarType(experimental::{{default_value}}))
+  {%- elif typename == "DataLayout" %} {# does DataLayout need any processing?#}
+static_cast<int>(experimental::{{default_value}})
+  {%- elif typename == "Place" %}{# construct a Place to get the type #}
+static_cast<int>(phi::Place({{"phi::" if not default_value is initializer_list}}{{default_value}}).GetType())
+  {%- else %}{# pass through as-is #}
+{{default_value}}
+  {%- endif %}
+{%- endmacro %}
+
+
+{# --------------------------------------- name mapping ---------------------------------------------- #}
+{% macro name_map(api) %}
+KernelSignature {{api["name"] | to_pascal_case }}OpArgumentMapping(const ArgumentMappingContext& ctx) {
+  {% set kernel_args = api["kernel"]["param"] %}
+  {{get_input_list(api["inputs"], kernel_args)}};
+  paddle::small_vector<const char*> attrs;
+  {% for attr in api["attrs"]%}
+  {% filter indent(2)%}
+  {{get_an_attr(attr)}};
+  {% endfilter %}
+  {% endfor %}
+  {{get_output_list(api["outputs"], kernel_args)}};
+  return KernelSignature("{{api["name"]}}", std::move(inputs), std::move(attrs), std::move(outputs));
+}
+{% endmacro %}
+
+
+{% macro register_name_map(api) %}
+PD_REGISTER_ARG_MAPPING_FN({{api["name"]}}, phi::{{api["name"] | to_pascal_case}}OpArgumentMapping);
+{%- endmacro %}
+
+{% macro get_input_list(inputs, kernel_args) %}{# inline #}
+paddle::small_vector<const char*> inputs {
+{%- for input in inputs %}
+{%- if input["name"] in kernel_args %}
+{{input["name"] | to_opmaker_name_cstr}}{{", " if not loop.last}}
+{%- endif %}
+{%- endfor %}
+}
+{%- endmacro %}
+
+{% macro get_an_attr(attr) %}{# inline #}
+{% set typename = attr["typename"] %}
+{% set name = attr["name"] %}
+{% if typename is scalar %}{# scalar correspond to a dispensable input and an attr in opmaker #}
+attrs.emplace_back(
+  ctx.HasInput("{{name | to_pascal_case}}")
+  ? "{{name | to_pascal_case}}Tensor"
+  : "{{name}}"
+)
+{%- elif typename == "IntArray" %}
+attrs.emplace_back(
+  ctx.HasInput("{{name | to_pascal_case}}Tensor")
+  ? "{{name | to_pascal_case}}Tensor"
+  : ctx.InputSize("{{name | to_pascal_case}}TensorList") > 0
+    ? "{{name | to_pascal_case}}TensorList"
+    : "{{name}}"
+)
+{%- else %}
+attrs.emplace_back("{{name}}")
+{%- endif %}
+{%- endmacro %}
+
+{% macro get_output_list(outputs, kernel_args) %}{# inline #}
+paddle::small_vector<const char*> outputs {
+{%- for output in outputs %}
+{{output["name"] | to_opmaker_name_cstr}}{{", " if not loop.last}}
+{%- endfor %}
+}
+{%- endmacro %}
+
+{# --------------------------------------- operator  ---------------------------------------------- #}
+{% macro operator(api) %}
+class {{api["name"] | to_pascal_case}}Op : public framework::OperatorWithKernel {
+ public:
+  using framework::OperatorWithKernel::OperatorWithKernel;
+};
+
+{# infershape functor #}
+DECLARE_INFER_SHAPE_FUNCTOR({{api["name"]}}, {{api["name"] | to_pascal_case}}InferShapeFunctor,
+                            PD_INFER_META(phi::{{api["infer_meta"]["func"]}}));
+{# inplace inferer #}
+{% if api["inplace"] is not none %}
+  {% set inplace_map %}
+  {% for source, target in api["inplace"].items() %}
+{{"{"}}{{source | to_opmaker_name}}, {{target | to_opmaker_name}}{{"}"}}{{", " if not loop.last}}
+  {%- endfor %}
+  {%- endset %}
+DECLARE_INPLACE_OP_INFERER({{api["name"] | to_pascal_case}}InplaceInferer,
+                           {{inplace_map}});
+{% endif %}
+
+{# no_need_buffer inferer #}
+{% if api["no_need_buffer"] is not none %}
+DECLARE_NO_NEED_BUFFER_VARS_INFERER({{api["name"] | to_pascal_case}}NoNeedBufferVarInferer,
+                                    {{api["no_need_buffer"] | map("to_opmaker_name") | join(", ")}});
+{% endif %}
+{% endmacro%}
+
+{% macro register_op_with_components(api) %}
+{% set name = api["name"] %}
+REGISTER_OPERATOR({{name}}, ops::{{name | to_pascal_case}}Op,
+{% if not "forward" in api %}{# it is a forward api #}
+                  ops::{{name | to_pascal_case}}OpMaker,
+{% endif %}
+{% if "backward" in api and api["backward"] is not none %}{# backward #}
+  {% set backward_name = api["backward"] %}
+                  ops::{{backward_name | to_pascal_case}}OpMaker<paddle::framework::OpDesc>,
+                  ops::{{backward_name | to_pascal_case}}OpMaker<paddle::imperative::OpBase>,
+{% endif %}
+{% if api is supports_inplace %}{# inplace#}
+                  ops::{{name | to_pascal_case}}InplaceInferer,
+{% endif %}
+{% if api is supports_no_need_buffer %}{# no_need_buffer #}
+                  ops::{{name | to_pascal_case}}NoNeedBufferVarInferer,
+{% endif %}
+                  ops::{{name | to_pascal_case}}InferShapeFunctor);
+{% endmacro %}
+
+
+{# --------------------------------------- backward op maker ---------------------------------------------- #}
+{% macro backward_op_maker(api, forward_api) %}
+  {% set name = api["name"] %}
+  {% set forward_input_names = api["forward"]["inputs"] | map(attribute="name") | list %}
+  {% set forward_output_names = api["forward"]["outputs"] | map(attribute="name") | list %}
+  {% set forward_attr_names = api["forward"]["attrs"] | map(attribute="name") | list %}
+  {% set forward_input_orig_names = forward_api["inputs"] | map(attribute="name") | list %}
+  {% set forward_output_orig_names = forward_api["outputs"] | map(attribute="name") | list %}
+  {% set forward_attr_orig_names = forward_api["attrs"] | map(attribute="name") | list %}
+template <typename T>
+class {{name | to_pascal_case}}OpMaker : public framework::SingleGradOpMaker<T> {
+ public:
+  using framework::SingleGradOpMaker<T>::SingleGradOpMaker;
+
+ protected:
+  void Apply(GradOpPtr<T> grad_op) const override {
+    grad_op->SetType("{{name}}");
+
+  {% for input in api["inputs"] %}
+    grad_op->SetInput("{{input["name"] | to_pascal_case}}", this->{{extract_input_from_forward(
+      input["name"], 
+      forward_input_names, 
+      forward_output_names,
+      forward_input_orig_names,
+      forward_output_orig_names)}});
+  {% endfor %}
+
+  {% for output in api["outputs"] %}
+    grad_op->SetOutput("{{output["name"] | to_pascal_case}}", this->{{extract_output_from_forward(
+      output["name"], 
+      forward_input_names, 
+      forward_output_names,
+      forward_input_orig_names,
+      forward_output_orig_names)}});
+  {% endfor %}
+
+  {% for attr in api["attrs"] %}
+    {% set attr_name = attr["name"] %}
+    {% if attr_name in forward_attr_names %}
+      {% if attr["typename"] == "IntArray" %}
+    grad_op->SetInput("{{attr_name | to_pascal_case}}Tensor", this->Input("{{attr_name | to_pascal_case}}Tensor"));
+    grad_op->SetInput("{{attr_name | to_pascal_case}}TensorList", this->Input("{{attr_name | to_pascal_case}}TensorList"));
+      {% elif attr["typename"] == "Scalar" %}
+    grad_op->SetInput("{{attr_name | to_pascal_case}}Tensor", this->Input("{{attr_name | to_pascal_case}}Tensor"));
+      {% endif %}
+    grad_op->SetAttr("{{attr_name}}", this->GetAttr("{{forward_attr_orig_names[forward_attr_names.index(attr_name)]}}"));
+    {% else %}{# maybe something wrong: backward op has more attrs than the forward one#}
+    grad_op->AddAttr<{{attr["typename"] | to_op_attr_type}}>({{attr_name}}, "({{attr["typename"] | to_op_attr_type}}), exceptional attr {{attr_name}}");
+    grad_op->SetAttr("{{attr_name}}", {{process_default_value(attr)}});
+    {% endif %}
+  {% endfor %}
+  }
+};
+{% endmacro %}
+
+
+{% macro extract_input_from_forward(name, 
+  input_names, output_names, 
+  input_orig_names, output_orig_names) %}{# inline #}
+  {% if name in input_names %}
+    {% set name_in_forward_orig = input_orig_names[input_names.index(name)]%}
+Input("{{name_in_forward_orig | to_pascal_case}}")
+  {%- elif name in output_names %}
+    {% set name_in_forward_orig = output_orig_names[output_names.index(name)]%}
+Output("{{name | to_pascal_case}}")
+  {%- elif name.endswith("_grad") %}{# output grad#}
+    {% set name_in_forward = name.removesuffix("_grad") %}
+    {% if name_in_forward in output_names %}
+      {% set name_in_forward_orig = output_orig_names[output_names.index(name_in_forward)] %}
+OutputGrad("{{name_in_forward_orig | to_pascal_case}}")
+    {%- endif %}
+  {%- endif %}
+{%- endmacro %}
+
+{% macro extract_output_from_forward(name, input_names, output_names,
+  input_orig_names, output_orig_names) %}{# inline #}
+  {% if name.removesuffix("_grad") in input_names %}
+    {% set name_in_forward = name.removesuffix("_grad") %}
+    {% set name_in_forward_orig = input_orig_names[input_names.index(name_in_forward)]%}
+InputGrad("{{name.removesuffix("_grad") | to_pascal_case}}")
+  {%- elif (name | to_input_name) in input_names %}
+    {% set name_in_forward = name | to_input_name %}
+    {% set name_in_forward_orig = input_orig_names[input_names.index(name_in_forward)]%}
+InputGrad("{{name | to_input_name | to_pascal_case}}")
+  {%- endif %}
+{%- endmacro %}
+
+{% macro extract_attr_from_forward(name, attr_names, attr_origin_names) %}
+this->GetAttr("{{name}}")
+{%- endmacro %}

python/paddle/utils/code_gen/tests.py

+# 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.
+
+import re
+from type_mapping import input_types_map, attr_types_map, output_type_map
+
+
+# tests for typename
+def is_input(s):
+    return s in input_types_map
+
+
+def is_attr(s):
+    return s in attr_types_map
+
+
+def is_output(s):
+    return s in output_type_map
+
+
+def is_vec(s):
+    return s.endswith("[]")
+
+
+def is_scalar(s):
+    return re.match(r"Scalar(\(\w+\))*", s) is not None
+
+
+def is_initializer_list(s):
+    return s == "{}"
+
+
+def is_base_api(api):
+    return "kernel" in api and "infer_meta" in api
+
+
+def supports_selected_rows_kernel(api):
+    return is_base_api(api) and len(api["kernel"]["func"]) == 2
+
+
+def supports_inplace(api):
+    return "inplace_map" in api
+
+
+def supports_no_need_buffer(api):
+    for input in api["inputs"]:
+        if input["no_need_buffer"]:
+            return True
+    return False

python/paddle/utils/code_gen/type_mapping.py

+# 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.
+
+# type mapping: types in yaml -> types in c++ API
+input_types_map = {
+    'Tensor': 'const Tensor&',
+    'Tensor[]': 'const std::vector<Tensor>&'
+}
+
+optional_input_types_map = {
+    'Tensor': 'const paddle::optional<Tensor>&',
+    'Tensor[]': 'const paddle::optional<std::vector<Tensor>>&',
+}
+
+attr_types_map = {
+    # special types
+    'IntArray': 'const IntArray&',
+    'Scalar': 'const Scalar&',
+    'Scalar(bool)': 'const Scalar&',
+    'Scalar(int)': 'const Scalar&',
+    'Scalar(int64_t)': 'const Scalar&',
+    'Scalar(float)': 'const Scalar&',
+    'Place': 'Place',
+    'DataLayout': 'DataLayout',
+    'DataType': 'DataType',
+    # scalar types
+    'bool': 'bool',
+    'int': 'int',
+    'int64_t': 'int64_t',
+    'float': 'float',
+    'double': 'double',
+    'str': 'const std::string&',
+    # vector types
+    'bool[]': 'const std::vector<bool>&',
+    'int[]': 'const std::vector<int>&',
+    'int64_t[]': 'const std::vector<int64_t>&',
+    'float[]': 'const std::vector<float>&',
+    'double[]': 'const std::vector<double>&',
+    'str[]': 'const std::vector<<std::string>&',
+}
+
+opmaker_attr_types_map = {
+    # special types
+    'IntArray': 'std::vector<int64_t>',
+    'Scalar': 'float',
+    'Scalar(bool)': 'bool',
+    'Scalar(int)': 'int',
+    'Scalar(int64_t)': 'int64_t',
+    'Scalar(float)': 'float',
+    'Place': 'int',
+    'DataLayout': 'int',
+    'DataType': 'int',
+    # scalar types
+    'bool': 'bool',
+    'int': 'int',
+    'int64_t': 'int64_t',
+    'float': 'float',
+    'double': 'double',
+    'str': 'std::string',
+    # vector types
+    'bool[]': 'std::vector<bool>',
+    'int[]': 'std::vector<int>',
+    'int64_t[]': 'std::vector<int64_t>',
+    'float[]': 'std::vector<float>',
+    'double[]': 'std::vector<double>',
+    'str[]': 'std::vector<<std::string>',
+}
+
+output_type_map = {'Tensor': 'Tensor', 'Tensor[]': 'std::vector<Tensor>'}
+
+#------------------------------ phi attr ------------------------------
+phi_attr_types_map = attr_types_map.copy()
+phi_attr_types_map.update({
+    'IntArray': 'const phi::IntArray&',
+    'Scalar': 'const phi::Scalar&'
+})
+
+#--------------------------- phi dense tensor ---------------------------
+# type mapping to phi, used in implementation
+dense_input_types_map = {
+    'Tensor': 'const phi::DenseTensor&',
+    'Tensor[]': 'const std::vector<const phi::DenseTensor*>&',
+}
+
+dense_optional_input_types_map = {
+    'Tensor': 'paddle::optional<const phi::DenseTensor&>',
+    'Tensor[]': 'paddle::optional<const std::vector<phi::DenseTensor>&>'
+}
+
+dense_output_types_map = {
+    'Tensor': 'phi::DenseTensor*',
+    'Tensor[]': 'std::vector<phi::DenseTensor*>'
+}
+
+#---------------------- phi selected rows------------------------------
+# type mapping to phi, used in implementation
+sr_input_types_map = {'Tensor': 'const phi::SelectedRows&', }
+
+sr_optional_input_types_map = {
+    'Tensor': 'paddle::optional<const phi::SelectedRows&>',
+}
+
+sr_output_types_map = {'Tensor': 'phi::SelectedRows*', }

python/paddle/utils/code_gen/wrapped_infermeta_gen.py

@@ -117,9 +117,13 @@ namespace phi {
 
 def generate_wrapped_infermeta_and_register(api_yaml_path, header_file_path,
                                             source_file_path):
+    apis = []
+    for each_api_yaml in api_yaml_path:
+        with open(each_api_yaml, 'r') as f:
+            api_list = yaml.load(f, Loader=yaml.FullLoader)
+            if api_list:
+                apis.extend(api_list)
 
-    with open(api_yaml_path, 'r') as f:
-        apis = yaml.load(f, Loader=yaml.FullLoader)
     header_file = open(header_file_path, 'w')
     source_file = open(source_file_path, 'w')
 
@@ -159,6 +163,7 @@ def main():
     parser.add_argument(
         '--api_yaml_path',
         help='path to api yaml file',
+        nargs='+',
         default='python/paddle/utils/code_gen/api.yaml')
     parser.add_argument(
         '--wrapped_infermeta_header_path',