support Pytorch model in the weight compression algorithm

nncf/common/graph/layer_attributes.py

@@ -271,9 +271,11 @@ class ConvertDtypeLayerAttributes(BaseLayerAttributes):
 
 
 @dataclass
-class ParameterLayerAttributes(BaseLayerAttributes):
+class ConstantLayerAttributes(BaseLayerAttributes):
     """
-    :param name: Parameter name.
+    :param name: Constant name.
+    :param shape: Constant shape.
     """
 
     name: str
+    shape: List[int]

nncf/common/graph/transformations/commands.py

@@ -214,16 +214,3 @@ def __init__(self, command_type: TransformationType, target_point: TargetPoint):
     @property
     def target_point(self) -> TargetPoint:
         return self._target_point
-
-    def check_command_compatibility(self, command: "TransformationCommand") -> bool:
-        return (
-            isinstance(command, TransformationCommand)
-            and self.type == command.type
-            and self.target_point == command.target_point
-        )
-
-    def union(self, other: "TransformationCommand") -> "TransformationCommand":
-        raise NotImplementedError()
-
-    def __add__(self, other: "TransformationCommand") -> "TransformationCommand":
-        return self.union(other)

nncf/experimental/tensor/__init__.py

@@ -9,8 +9,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from nncf.experimental.tensor.enums import TensorBackendType as TensorBackendType
-from nncf.experimental.tensor.enums import TensorDataType as TensorDataType
-from nncf.experimental.tensor.enums import TensorDeviceType as TensorDeviceType
+from nncf.experimental.tensor.definitions import TensorBackendType as TensorBackendType
+from nncf.experimental.tensor.definitions import TensorDataType as TensorDataType
+from nncf.experimental.tensor.definitions import TensorDeviceType as TensorDeviceType
 from nncf.experimental.tensor.tensor import Tensor as Tensor
 from nncf.experimental.tensor.tensor import unwrap_tensor_data as unwrap_tensor_data

nncf/experimental/tensor/enums.py → nncf/experimental/tensor/definitions.py

@@ -9,6 +9,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from dataclasses import dataclass
 from enum import Enum
 from enum import auto
 
@@ -32,6 +33,7 @@ class TensorDataType(Enum):
     float64 = auto()
     int8 = auto()
     uint8 = auto()
+    int32 = auto()
 
 
 class TensorDeviceType(Enum):
@@ -41,3 +43,18 @@ class TensorDeviceType(Enum):
 
     CPU = auto()
     GPU = auto()
+
+
+@dataclass
+class TypeInfo:
+    """
+    The class represents the numerical properties of a floating point types.
+
+    :param eps: The smallest representable number such that 1.0 + eps != 1.0.
+    :param max: The largest representable number.
+    :param min: The smallest representable number (typically -max).
+    """
+
+    eps: float
+    max: float
+    min: float

nncf/experimental/tensor/functions.py

@@ -10,15 +10,14 @@
 # limitations under the License.
 
 import functools
-from typing import Callable, List, Optional, Tuple, TypeVar, Union
+from typing import Any, Callable, List, Optional, Tuple, Union
 
-from nncf.experimental.tensor.enums import TensorDataType
-from nncf.experimental.tensor.enums import TensorDeviceType
+from nncf.experimental.tensor.definitions import TensorDataType
+from nncf.experimental.tensor.definitions import TensorDeviceType
+from nncf.experimental.tensor.definitions import TypeInfo
 from nncf.experimental.tensor.tensor import Tensor
 from nncf.experimental.tensor.tensor import unwrap_tensor_data
 
-TypeInfo = TypeVar("TypeInfo")
-
 
 def _tensor_guard(func: callable):
     """
@@ -442,6 +441,50 @@ def finfo(a: Tensor) -> TypeInfo:
     return finfo(a.data)
 
 
+@functools.singledispatch
+@_tensor_guard
+def clip(a: Tensor, a_min: Union[Tensor, float], a_max: Union[Tensor, float]) -> Tensor:
+    """
+    Clips all elements in input into the range [ a_min, a_max ]
+
+    :param a: Tensor.
+    :param a_min: A lower-bound of the range to be clamped to.
+    :param a_max: An upper-bound of the range to be clamped to.
+    :return: A clipped tensor with the elements of a, but where values < a_min are replaced with a_min,
+        and those > a_max with a_max.
+    """
+    return Tensor(clip(a.data, unwrap_tensor_data(a_min), unwrap_tensor_data(a_max)))
+
+
+@functools.singledispatch
+@_tensor_guard
+def as_tensor_like(a: Tensor, data: Any) -> Tensor:
+    """
+    Converts the data into a tensor with the same data representation and hosted on the same device
+    as the given tensor.
+
+    :param a: A tensor for defining the data representation and the host device of the output tensor.
+    :param data: Initial data for the tensor. Can be a list, tuple, NumPy ndarray, scalar, and other types.
+    :return: A tensor with the same data representation and hosted on the same device as a,
+        and which has been initialized with data.
+    """
+    return Tensor(as_tensor_like(a.data, data))
+
+
+@functools.singledispatch
+@_tensor_guard
+def item(a: Tensor) -> Union[int, float, bool]:
+    """
+    Returns the value of this tensor as a standard Python number. This only works for tensors with one element.
+
+    :param a: Tensor.
+    :return: The value of this tensor as a standard Python number
+    """
+    if isinstance(a.data, (int, float, bool)):
+        return a.data
+    return item(a.data)
+
+
 def _dispatch_list(fn: "functools._SingleDispatchCallable", tensor_list: List[Tensor], *args, **kwargs):
     """
     Dispatches the function to the type of the wrapped data of the first element in tensor_list.

nncf/experimental/tensor/numpy_functions.py

@@ -9,20 +9,22 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from typing import Callable, List, Optional, Tuple, Union
+from typing import Any, Callable, List, Optional, Tuple, Union
 
 import numpy as np
 
 from nncf.experimental.tensor import functions as fns
-from nncf.experimental.tensor.enums import TensorDataType
-from nncf.experimental.tensor.enums import TensorDeviceType
+from nncf.experimental.tensor.definitions import TensorDataType
+from nncf.experimental.tensor.definitions import TensorDeviceType
+from nncf.experimental.tensor.definitions import TypeInfo
 
 DTYPE_MAP = {
     TensorDataType.float16: np.dtype(np.float16),
     TensorDataType.float32: np.dtype(np.float32),
     TensorDataType.float64: np.dtype(np.float64),
     TensorDataType.int8: np.dtype(np.int8),
     TensorDataType.uint8: np.dtype(np.uint8),
+    TensorDataType.int32: np.dtype(np.int32),
 }
 
 DTYPE_MAP_REV = {v: k for k, v in DTYPE_MAP.items()}
@@ -209,5 +211,25 @@ def _(
 
 
 @_register_numpy_types(fns.finfo)
-def _(a: np.ndarray) -> np.finfo:
-    return np.finfo(a.dtype)
+def _(a: np.ndarray) -> TypeInfo:
+    ti = np.finfo(a.dtype)
+    return TypeInfo(ti.eps, ti.max, ti.min)
+
+
+@_register_numpy_types(fns.clip)
+def _(
+    a: Union[np.ndarray, np.generic],
+    a_min: Union[np.ndarray, np.generic, float],
+    a_max: Union[np.ndarray, np.generic, float],
+) -> Union[np.ndarray, np.generic]:
+    return np.clip(a, a_min, a_max)
+
+
+@_register_numpy_types(fns.as_tensor_like)
+def _(a: Union[np.ndarray, np.generic], data: Any) -> Union[np.ndarray, np.generic]:
+    return np.array(data)
+
+
+@_register_numpy_types(fns.item)
+def _(a: Union[np.ndarray, np.generic]) -> Union[int, float, bool]:
+    return a.item()

nncf/experimental/tensor/tensor.py

@@ -13,8 +13,8 @@
 import operator
 from typing import Any, Optional, Tuple, TypeVar, Union
 
-from nncf.experimental.tensor.enums import TensorDataType
-from nncf.experimental.tensor.enums import TensorDeviceType
+from nncf.experimental.tensor.definitions import TensorDataType
+from nncf.experimental.tensor.definitions import TensorDeviceType
 
 TTensor = TypeVar("TTensor")
 
@@ -44,7 +44,7 @@ def device(self) -> TensorDeviceType:
         return _call_function("device", self)
 
     @property
-    def dtype(self) -> TensorDeviceType:
+    def dtype(self) -> TensorDataType:
         return _call_function("dtype", self)
 
     def __bool__(self) -> bool:
@@ -146,6 +146,9 @@ def astype(self, dtype: TensorDataType) -> Tensor:
     def reshape(self, shape: Tuple[int, ...]) -> Tensor:
         return _call_function("reshape", self, shape)
 
+    def item(self) -> float:
+        return _call_function("item", self)
+
 
 def _call_function(func_name: str, *args):
     """

nncf/experimental/tensor/torch_functions.py

@@ -9,20 +9,22 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from typing import Callable, List, Optional, Tuple, Union
+from typing import Any, Callable, List, Optional, Tuple, Union
 
 import torch
 
 from nncf.experimental.tensor import TensorDataType
 from nncf.experimental.tensor import TensorDeviceType
 from nncf.experimental.tensor import functions as fns
+from nncf.experimental.tensor.definitions import TypeInfo
 
 DTYPE_MAP = {
     TensorDataType.float16: torch.float16,
     TensorDataType.float32: torch.float32,
     TensorDataType.float64: torch.float64,
     TensorDataType.int8: torch.int8,
     TensorDataType.uint8: torch.uint8,
+    TensorDataType.int32: torch.int32,
 }
 
 DTYPE_MAP_REV = {v: k for k, v in DTYPE_MAP.items()}
@@ -200,3 +202,24 @@ def _(a: torch.Tensor, b: Union[torch.Tensor, float], operator_fn: Callable) ->
 @fns._binary_reverse_op_nowarn.register(torch.Tensor)
 def _(a: torch.Tensor, b: Union[torch.Tensor, float], operator_fn: Callable) -> torch.Tensor:
     return operator_fn(b, a)
+
+
+@fns.clip.register(torch.Tensor)
+def _(a: torch.Tensor, a_min: Union[torch.Tensor, float], a_max: Union[torch.Tensor, float]) -> torch.Tensor:
+    return torch.clip(a, a_min, a_max)
+
+
+@fns.finfo.register(torch.Tensor)
+def _(a: torch.Tensor) -> TypeInfo:
+    ti = torch.finfo(a.dtype)
+    return TypeInfo(ti.eps, ti.max, ti.min)
+
+
+@fns.as_tensor_like.register(torch.Tensor)
+def _(a: torch.Tensor, data: Any) -> torch.Tensor:
+    return torch.as_tensor(data, device=a.device)
+
+
+@fns.item.register(torch.Tensor)
+def _(a: torch.Tensor) -> Union[int, float, bool]:
+    return a.item()

nncf/onnx/graph/transformations/commands.py

@@ -56,10 +56,6 @@ def __init__(self, target_point: ONNXTargetPoint, input_edges_mapping: Dict[str,
         # need to keep the mapping NNCF input nodes to the following ONNX nodes.
         self.input_edges_mapping = input_edges_mapping
 
-    def union(self, other: "TransformationCommand") -> "TransformationCommand":
-        # Have a look at nncf/torch/graph/transformations/commands/PTInsertionCommand
-        raise NotImplementedError()
-
 
 class ONNXQuantizerInsertionCommand(ONNXInsertionCommand):
     def __init__(
@@ -71,15 +67,10 @@ def __init__(
         super().__init__(target_point, nncf_input_node_next_onnx_nodes)
         self.quantizer_parameters = quantizer_parameters
 
-    def union(self, other: "TransformationCommand") -> "TransformationCommand":
-        # Have a look at nncf/torch/graph/transformations/commands/PTInsertionCommand
-        raise NotImplementedError()
-
 
 class ONNXOutputInsertionCommand(ONNXInsertionCommand):
-    def union(self, other: "TransformationCommand") -> "TransformationCommand":
-        # Have a look at nncf/torch/graph/transformations/commands/PTInsertionCommand
-        raise NotImplementedError()
+    def __init__(self, target_point: ONNXTargetPoint, input_edges_mapping: Dict[str, Tuple[str, int]]):
+        super().__init__(TransformationType.INSERT, target_point, input_edges_mapping)
 
 
 class ONNXBiasCorrectionCommand(TransformationCommand):
@@ -95,10 +86,6 @@ def __init__(self, target_point: ONNXTargetPoint, bias_value: np.ndarray):
         super().__init__(TransformationType.CHANGE, target_point)
         self.bias_value = bias_value
 
-    def union(self, other: "TransformationCommand") -> "TransformationCommand":
-        # Have a look at nncf/torch/graph/transformations/commands/PTInsertionCommand
-        raise NotImplementedError()
-
 
 class ONNXModelExtractionCommand(Command):
     """
@@ -114,10 +101,6 @@ def __init__(self, inputs: List[str], outputs: List[str]):
         self.inputs = inputs
         self.outputs = outputs
 
-    def union(self, other: "Command") -> "Command":
-        # Have a look at nncf/torch/graph/transformations/commands/PTInsertionCommand
-        raise NotImplementedError()
-
 
 class ONNXQDQNodeRemovingCommand(TransformationCommand):
     """
@@ -130,10 +113,6 @@ def __init__(self, target_point: ONNXTargetPoint):
         """
         super().__init__(TransformationType.REMOVE, target_point)
 
-    def union(self, other: "TransformationCommand") -> "TransformationCommand":
-        # Have a look at nncf/torch/graph/transformations/commands/PTInsertionCommand
-        raise NotImplementedError()
-
 
 class ONNXNullBiasInsertionCommand(TransformationCommand):
     """
@@ -145,7 +124,3 @@ def __init__(self, target_point: ONNXTargetPoint):
         :param target_point: The TargetPoint instance for the insertion that contains layer's information.
         """
         super().__init__(TransformationType.INSERT, target_point)
-
-    def union(self, other: "TransformationCommand") -> "TransformationCommand":
-        # Have a look at nncf/torch/graph/transformations/commands/PTInsertionCommand
-        raise NotImplementedError()

nncf/onnx/quantization/quantizer_parameters.py

@@ -14,6 +14,7 @@
 
 import numpy as np
 
+from nncf.experimental.tensor import functions as fns
 from nncf.quantization.fake_quantize import FakeQuantizeParameters
 from nncf.quantization.fake_quantize import calculate_scale_zero_point
 
@@ -54,17 +55,17 @@ def convert_fq_params_to_onnx_params(
     if levels not in [255, 256]:
         raise ValueError("Can only export to INT8/UIN8 256-level ONNX Quantize/Dequantize pairs.")
 
-    input_low, input_high = parameters.input_low.data, parameters.input_high.data
-    output_low, output_high = parameters.output_low.data, parameters.output_high.data
-    if not np.allclose(input_high, output_high) or not np.allclose(input_low, output_low):
+    input_low, input_high = parameters.input_low, parameters.input_high
+    output_low, output_high = parameters.output_low, parameters.output_high
+    if not fns.allclose(input_high, output_high) or not fns.allclose(input_low, output_low):
         raise ValueError(
             "ONNX Quantize/Dequantize pairs only support input_high == output_high and input_low == output_low."
         )
 
     level_low, level_high = get_level_low_level_high(tensor_type)
     narrow_range = levels == 2**num_bits - 1
     scale, zero_point = calculate_scale_zero_point(input_low, input_high, level_low, level_high, narrow_range)
-    return ONNXQuantizerLayerParameters(scale, zero_point, tensor_type, axis)
+    return ONNXQuantizerLayerParameters(scale.data, zero_point.data, tensor_type, axis)
 
 
 def get_level_low_level_high(tensor_type: np.dtype) -> Tuple[int, int]: