| # Copyright (C) 2020 Arm Limited or its affiliates. All rights reserved. |
| # |
| # SPDX-License-Identifier: Apache-2.0 |
| # |
| # 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 |
| # |
| # 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. |
| # Description: |
| # The SupportedOperators class which is a collection of all supported operators and parameter checks. |
| from .data_type import BaseType |
| from .data_type import DataType |
| |
| |
| class SupportedOperators: |
| def __init__(self): |
| # Categorised lists of supported operators |
| self.npu_pre_ops = set(("QuantizedResizeBilinear", "SplitSliceRead")) |
| self.convolution_ops = set(("Conv2DBiasAct", "Conv2D", "QuantizedConv2D")) |
| self.depthwise_convolution_ops = set( |
| ("DepthwiseConv2dBiasAct", "DepthwiseConv2dNative", "QuantizedDepthwiseConv2D") |
| ) |
| self.transpose_convolution_ops = set(("Conv2DBackpropInput",)) |
| self.max_pooling_ops = set(("QuantizedMaxPool", "MaxPool", "MaxPoolAct")) |
| self.avg_pooling_ops = set(("QuantizedAvgPool", "AvgPool", "AvgPoolAct")) |
| self.pooling_ops = self.max_pooling_ops | self.avg_pooling_ops |
| self.resizing_ops = set(("ResizeBilinear",)) |
| self.fc_vector_products = set(("QuantizedMatMul", "MatMul", "FullyConnectedAct")) |
| self.mac_main_ops = ( |
| # convolutions |
| self.convolution_ops |
| # depth-wise convolutions |
| | self.depthwise_convolution_ops |
| # transpose convolutions |
| | self.transpose_convolution_ops |
| # pooling |
| | self.pooling_ops |
| # resizing/upscaling |
| | self.resizing_ops |
| # FC layers |
| | self.fc_vector_products |
| # RNN/LSTM/GRU |
| | set(("BlockLSTM")) |
| ) |
| self.unary_elem_wise_main_ops = set(("LeakyRelu", "Abs")) |
| self.binary_elem_wise_min_max_ops = set(("Minimum", "Maximum")) |
| self.binary_elem_wise_add_mul_sub = set( |
| ("AddAct", "MulAct", "SubAct", "QuantizedAdd", "QuantizedSub", "QuantizedMul", "Mul", "Add", "Sub",) |
| ) |
| self.binary_elem_wise_main_ops = self.binary_elem_wise_min_max_ops | self.binary_elem_wise_add_mul_sub |
| self.elem_wise_main_ops = self.binary_elem_wise_main_ops | self.unary_elem_wise_main_ops |
| self.activation_ops = set( |
| ("QuantizedRelu", "QuantizedRelu1", "QuantizedRelu6", "Relu", "Relu6", "ReluN1To1", "Sigmoid", "Tanh") |
| ) |
| self.npu_post_ops = ( |
| # activation functions |
| self.activation_ops |
| # concatenation write direction |
| | set(("ConcatSliceWrite")) |
| # bias add and batch norm |
| | set(("QuantizedBiasAdd", "Requantize", "QuantizedBatchNorm", "BiasAdd", "FusedBatchNorm")) |
| # Quantization |
| | set(("Quantize",)) |
| ) |
| self.split_ops = set(("Split", "SplitV", "StridedSlice", "Slice", "UnpackReshaped", "Unpack")) |
| self.concat_ops = set(("Concat", "ConcatV2", "QuantizedConcat", "ConcatTFLite", "PackReshaped", "Pack")) |
| self.memory_only_ops = ( |
| set(("Squeeze", "Reshape", "QuantizedReshape", "ExpandDims")) | self.concat_ops | self.split_ops |
| ) |
| self.supported_fused_activations = set(("Relu", "Relu6", "ReluN1To1", "Tanh", "Sigmoid")) |
| self.supported_operators = ( |
| self.npu_pre_ops | self.mac_main_ops | self.elem_wise_main_ops | self.npu_post_ops | self.memory_only_ops |
| ) |
| # Setup supported operator restriction checkers |
| self.supported_operator_restrictions = {} |
| self.supported_operator_restrictions.update( |
| {op: self.check_convolution_restrictions for op in self.convolution_ops} |
| ) |
| self.supported_operator_restrictions.update( |
| {op: self.check_depthwise_convolution_restrictions for op in self.depthwise_convolution_ops} |
| ) |
| self.supported_operator_restrictions.update( |
| {op: self.check_transpose_convolution_restrictions for op in self.transpose_convolution_ops} |
| ) |
| self.supported_operator_restrictions.update({op: self.check_pooling_restrictions for op in self.pooling_ops}) |
| self.supported_operator_restrictions.update({op: self.check_resize_restrictions for op in self.resizing_ops}) |
| self.supported_operator_restrictions.update( |
| {op: self.check_vector_product_restrictions for op in self.fc_vector_products} |
| ) |
| self.supported_operator_restrictions.update( |
| {op: self.check_element_wise_restrictions for op in self.elem_wise_main_ops} |
| ) |
| self.supported_operator_restrictions.update( |
| {op: self.check_memory_only_restrictions for op in self.memory_only_ops} |
| ) |
| self.supported_operator_restrictions.update( |
| {op: self.check_quantization_restrictions for op in self.binary_elem_wise_min_max_ops} |
| ) |
| |
| def is_operator_supported(self, op): |
| if op.type not in self.supported_operators: |
| return False |
| if not self.check_generic_restrictions(op): |
| return False |
| if op.type in self.supported_operator_restrictions: |
| return self.supported_operator_restrictions[op.type](op) |
| return True |
| |
| def check_generic_restrictions(self, op): |
| # check fully defined shapes |
| for t in op.inputs + op.outputs: |
| if not t.has_fully_defined_shape(): |
| print("Warning:", op, "has inputs/outputs of undefined shape, placing on CPU") |
| return False |
| |
| # check data type |
| tensors = [t for t in op.get_ifm_ifm2_weights_ofm() if t is not None] |
| if not tensors: |
| tensors = op.inputs |
| for t in tensors: |
| if not (t.dtype.type & BaseType.Int): |
| return False |
| if t.element_size() > 2 and op.type not in ("Requantize") | self.binary_elem_wise_add_mul_sub: |
| return False |
| # check size |
| if any(dim > 65536 for dim in t.shape): |
| return False |
| |
| # check fused activations |
| if ( |
| "fused_activation_function" in op.attrs |
| and op.attrs["fused_activation_function"] is not None |
| and op.attrs["fused_activation_function"] not in self.supported_fused_activations |
| ): |
| return False |
| return True |
| |
| def check_convolution_restrictions(self, op): |
| # check stride |
| if op.attrs["stride_w"] > 3 or op.attrs["stride_h"] > 3: |
| return False |
| |
| # check dilation |
| dilation_w_factor = op.attrs.get("dilation_w_factor", 1) |
| dilation_h_factor = op.attrs.get("dilation_h_factor", 1) |
| if dilation_w_factor > 2 or dilation_h_factor > 2: |
| return False |
| |
| # check data type |
| ifm_tensor, _, weight_tensor, _ = op.get_ifm_ifm2_weights_ofm() |
| if weight_tensor.element_size() > 1: |
| return False |
| |
| # check kernel size |
| dilated_weight_w = weight_tensor.shape[0] + (weight_tensor.shape[0] - 1) * (dilation_w_factor - 1) |
| dilated_weight_h = weight_tensor.shape[1] + (weight_tensor.shape[1] - 1) * (dilation_h_factor - 1) |
| if ( |
| dilated_weight_w > 64 |
| or dilated_weight_h > 64 |
| or dilated_weight_w * dilated_weight_h * weight_tensor.shape[2] > 127 * 65536 |
| ): |
| return False |
| |
| # check batch size |
| if ifm_tensor.shape[0] != 1: |
| return False |
| return True |
| |
| def check_depthwise_convolution_restrictions(self, op): |
| # check depth |
| ifm_tensor, _, _, ofm_tensor = op.get_ifm_ifm2_weights_ofm() |
| if op.attrs["depth_multiplier"] > 1 and not ( |
| (ifm_tensor.shape[3] == 1) and (ofm_tensor.shape[3] == op.attrs["depth_multiplier"]) |
| ): |
| return False |
| return self.check_convolution_restrictions(op) |
| |
| def check_transpose_convolution_restrictions(self, op): |
| # check stride |
| stride_h, stride_w = op.attrs["stride_h"], op.attrs["stride_w"] |
| if stride_h != stride_w != 2: |
| return False |
| |
| # check output dimensions |
| ifm_tensor, weight_tensor, _, ofm_tensor = op.get_ifm_weights_biases_ofm() |
| ifm_h, ifm_w = ifm_tensor.shape[1], ifm_tensor.shape[2] |
| ofm_h, ofm_w = ofm_tensor.shape[1], ofm_tensor.shape[2] |
| if op.attrs["padding"] == b"SAME": |
| if (ofm_h != ifm_h * stride_h) or (ofm_w != ifm_w * stride_w): |
| return False |
| elif op.attrs["padding"] == b"VALID": |
| kernel_h, kernel_w = weight_tensor.shape[0], weight_tensor.shape[1] |
| if (ofm_h != (ifm_h) * stride_h + max(kernel_h - stride_h, 0)) or ( |
| ofm_w != (ifm_w) * stride_w + max(kernel_w - stride_w, 0) |
| ): |
| return False |
| |
| return self.check_convolution_restrictions(op) |
| |
| def check_pooling_restrictions(self, op): |
| # check stride |
| if op.attrs["stride_w"] > 3 or op.attrs["stride_h"] > 3: |
| return False |
| |
| # check data type |
| ifm_tensor, _, _, ofm_tensor = op.get_ifm_ifm2_weights_ofm() |
| if ifm_tensor.dtype != ofm_tensor.dtype: |
| return False |
| |
| # check batch size |
| if ifm_tensor.shape[0] != 1: |
| return False |
| |
| if op.type in self.avg_pooling_ops: |
| # check kernel size |
| if op.attrs["padding"] == b"SAME" and (op.attrs["filter_width"] > 8 or op.attrs["filter_height"] > 8): |
| return False |
| if op.attrs["padding"] == b"VALID" and ( |
| op.attrs["filter_width"] * op.attrs["filter_height"] > 256 * 256 or op.attrs["filter_height"] > 256 |
| ): |
| return False |
| |
| if op.type in self.max_pooling_ops: |
| # check kernel size (any padding) |
| if op.attrs["filter_width"] * op.attrs["filter_height"] > 256 * 256 or op.attrs["filter_height"] > 256: |
| return False |
| return True |
| |
| def check_resize_restrictions(self, op): |
| # check unsupported upscaling factor |
| if op.type == "ResizeBilinear": |
| upscaled_shape = [op.inputs[0].shape[1] * 2, op.inputs[0].shape[2] * 2] |
| out_shape = op.outputs[0].shape[1:3] |
| if not op.attrs["align_corners"] and out_shape != upscaled_shape: |
| return False |
| elif op.attrs["align_corners"] and out_shape != [upscaled_shape[0] - 1, upscaled_shape[1] - 1]: |
| return False |
| return True |
| |
| def check_vector_product_restrictions(self, op): |
| # check data type |
| ifm_tensor, _, weight_tensor, _ = op.get_ifm_ifm2_weights_ofm() |
| if weight_tensor.element_size() > 1: |
| return False |
| |
| return True |
| |
| def check_element_wise_restrictions(self, op): |
| # check data type |
| ifm_tensor, ifm2_tensor, _, ofm_tensor = op.get_ifm_ifm2_weights_ofm() |
| # input and output datatype must match for these operators |
| if ( |
| op.type in self.binary_elem_wise_min_max_ops | self.unary_elem_wise_main_ops |
| and ifm_tensor.dtype != ofm_tensor.dtype |
| ): |
| return False |
| if op.type in self.binary_elem_wise_add_mul_sub: |
| # both inputs must have same type |
| if ifm_tensor.dtype != ifm2_tensor.dtype: |
| return False |
| # signed input check |
| if ifm_tensor.dtype.type & BaseType.Signed: |
| # output must be signed |
| if ofm_tensor.dtype.type & BaseType.Unsigned: |
| return False |
| # and 8, 16 or 32-bit |
| if ofm_tensor.element_size() not in (1, 2, 4): |
| return False |
| # unsigned input check, output must be same type or int32 |
| if ifm_tensor.dtype.type & BaseType.Unsigned and not ( |
| ifm_tensor.dtype == ofm_tensor.dtype or ofm_tensor.dtype == DataType.int32 |
| ): |
| return False |
| |
| # check batch size |
| if len(ifm_tensor.shape) > 2 and ifm_tensor.shape[0] != 1: |
| return False |
| if op.type in self.binary_elem_wise_main_ops: # if op type is unary, ifm2_tensor is None |
| if len(ifm2_tensor.shape) > 2 and ifm2_tensor.shape[0] != 1: |
| return False |
| |
| # negative alpha values are not supported |
| if op.type == "LeakyRelu" and op.attrs["alpha"] < 0: |
| return False |
| |
| return True |
| |
| def check_memory_only_restrictions(self, op): |
| if op.type == "StridedSlice": |
| # check stride size |
| if len(op.inputs) > 3 and any(stride != 1 for stride in op.inputs[3].values): |
| return False |
| # check ellipsis_mask |
| if op.attrs["ellipsis_mask"] != 0: |
| return False |
| # check if both new_axis_mask and shrink_axis_mask have bit set |
| if op.attrs["new_axis_mask"] != 0 and op.attrs["shrink_axis_mask"] != 0: |
| return False |
| return True |
| |
| def check_quantization_restrictions(self, op): |
| # makes sure IFM1, IFM2 and OFM quantization are equal for binary ops |
| if (len(op.inputs) == 2 |
| and not op.inputs[0].quantization == op.inputs[1].quantization == op.outputs[0].quantization): |
| print("Warning: Input/output tensors with different quantization is unsupported for the", op.type, |
| "operator") |
| return False |
| return True |