| # 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. |
| import numpy as np |
| |
| from .data_type import BaseType |
| from .data_type import DataType |
| from .numeric_util import is_integer |
| from .operation import get_slice_offsets |
| from .operation import Op |
| |
| |
| # Custom decorator function to allow formatting docstrings containing "{}" |
| def docstring_format_args(args): |
| def docstring(func): |
| func.__doc__ = func.__doc__.format(*args) |
| return func |
| |
| return docstring |
| |
| |
| def warn_cpu(op, msg): |
| print("Warning: {} {}, placing on CPU".format(op.type, msg)) |
| |
| |
| class SupportedOperators: |
| # Categorised lists of supported operators |
| npu_pre_ops = set((Op.SplitSliceRead,)) |
| convolution_ops = set((Op.Conv2DBias, Op.Conv2D, Op.QuantizedConv2D,)) |
| depthwise_convolution_ops = set((Op.DepthwiseConv2DBias,)) |
| transpose_convolution_ops = set((Op.Conv2DBackpropInput,)) |
| max_pooling_ops = Op.op_set(Op.is_maxpool_op) |
| avg_pooling_ops = Op.op_set(Op.is_avgpool_op) |
| pooling_ops = set((Op.ReduceSum,)) | max_pooling_ops | avg_pooling_ops |
| resizing_ops = set((Op.ResizeBilinear,)) |
| fc_vector_products = set((Op.QuantizedMatMul, Op.MatMul, Op.FullyConnected,)) |
| mac_main_ops = ( |
| # RNN/LSTM/GRU |
| set((Op.BlockLSTM,)) |
| # convolutions |
| | convolution_ops |
| # depth-wise convolutions |
| | depthwise_convolution_ops |
| # transpose convolutions |
| | transpose_convolution_ops |
| # pooling |
| | pooling_ops |
| # resizing/upscaling |
| | resizing_ops |
| # FC layers |
| | fc_vector_products |
| ) |
| unary_elem_wise_main_ops = Op.op_set(Op.is_unary_elementwise_op) |
| binary_elem_wise_min_max_ops = set((Op.Minimum, Op.Maximum,)) |
| binary_elem_wise_shift_ops = set((Op.SHL, Op.SHR,)) |
| binary_elem_wise_add_mul_sub = set((Op.Add, Op.Mul, Op.Sub,)) |
| binary_elem_wise_main_ops = binary_elem_wise_min_max_ops | binary_elem_wise_add_mul_sub | binary_elem_wise_shift_ops |
| elem_wise_main_ops = binary_elem_wise_main_ops | unary_elem_wise_main_ops |
| supported_int32_tensor_ops = ( |
| set((Op.ReduceSum, Op.CLZ,)) | binary_elem_wise_add_mul_sub | binary_elem_wise_shift_ops |
| ) |
| activation_ops = set((Op.Relu, Op.Relu6, Op.ReluN1To1, Op.Sigmoid, Op.Tanh, Op.Softmax,)) |
| npu_post_ops = ( |
| # activation functions |
| activation_ops |
| # concatenation write direction |
| | set((Op.ConcatSliceWrite,)) |
| # Quantization |
| | set((Op.Quantize,)) |
| ) |
| split_ops = set((Op.Split, Op.SplitV, Op.StridedSlice, Op.Slice, Op.UnpackReshaped, Op.Unpack,)) |
| concat_ops = set((Op.Concat, Op.ConcatTFLite, Op.PackReshaped, Op.Pack,)) |
| memory_only_ops = set((Op.Squeeze, Op.Reshape, Op.QuantizedReshape, Op.ExpandDims,)) | concat_ops | split_ops |
| shapeless_input_ops = binary_elem_wise_main_ops | set((Op.Split, Op.SplitV,)) |
| supported_fused_activations = set((Op.Relu, Op.Relu6, Op.ReluN1To1, Op.Tanh, Op.Sigmoid, Op.LUT,)) |
| supported_operators = npu_pre_ops | mac_main_ops | elem_wise_main_ops | npu_post_ops | memory_only_ops |
| supported_dtypes = set((DataType.uint8, DataType.int8, DataType.int16, DataType.int32)) |
| # Defined ranges for allowed values: |
| tens_dim_range = (1, 65535) |
| |
| def __init__(self): |
| # Setup supported operator restriction checkers |
| self.supported_operator_restrictions = {} |
| self.supported_operator_restrictions.update( |
| {op: self.check_convolution_restrictions for op in SupportedOperators.convolution_ops} |
| ) |
| self.supported_operator_restrictions.update( |
| {op: self.check_depthwise_convolution_restrictions for op in SupportedOperators.depthwise_convolution_ops} |
| ) |
| self.supported_operator_restrictions.update( |
| {op: self.check_transpose_convolution_restrictions for op in SupportedOperators.transpose_convolution_ops} |
| ) |
| self.supported_operator_restrictions.update( |
| {op: self.check_pooling_restrictions for op in SupportedOperators.pooling_ops} |
| ) |
| self.supported_operator_restrictions.update( |
| {op: self.check_resize_restrictions for op in SupportedOperators.resizing_ops} |
| ) |
| self.supported_operator_restrictions.update( |
| {op: self.check_vector_product_restrictions for op in SupportedOperators.fc_vector_products} |
| ) |
| self.supported_operator_restrictions.update( |
| {op: self.check_element_wise_restrictions for op in SupportedOperators.elem_wise_main_ops} |
| ) |
| self.supported_operator_restrictions.update( |
| {op: self.check_memory_only_restrictions for op in SupportedOperators.memory_only_ops} |
| ) |
| self.supported_operator_restrictions.update( |
| {op: self.check_activation_ops for op in SupportedOperators.activation_ops} |
| ) |
| # Setup the generic constraints. Note: the order matters |
| self.generic_constraints = [] |
| self.generic_constraints.append(SupportedOperators.constraint_tens_defined_shape) |
| self.generic_constraints.append(SupportedOperators.constraint_tens_output_shapeless) |
| self.generic_constraints.append(SupportedOperators.constraint_tens_input_shapeless) |
| self.generic_constraints.append(SupportedOperators.constraint_tens_shape_size) |
| self.generic_constraints.append(SupportedOperators.constraint_tens_dtype) |
| self.generic_constraints.append(SupportedOperators.constraint_tens_int32_ops) |
| self.generic_constraints.append(SupportedOperators.constraint_tens_dimension) |
| self.generic_constraints.append(SupportedOperators.constraint_tens_quant_none_check) |
| self.generic_constraints.append(SupportedOperators.constraint_tens_quant_scale) |
| self.generic_constraints.append(SupportedOperators.constraint_faf) |
| |
| def is_operator_supported(self, op): |
| if op.type not in SupportedOperators.supported_operators: |
| if op.type not in (Op.Placeholder, Op.SubgraphInput, Op.Const): |
| print("Info: {} '{}' is not supported on the NPU. Placing on CPU instead".format(op.type, op.name)) |
| return False |
| for constraint in self.generic_constraints: |
| valid, extra = constraint(op) |
| if not valid: |
| print("Warning: {} '{}' is not supported on the NPU. Placing on CPU instead".format(op.type, op.name)) |
| print(" - {}".format(constraint.__doc__)) |
| if extra: |
| print(" {}".format(extra)) |
| return False |
| if op.type in self.supported_operator_restrictions: |
| return self.supported_operator_restrictions[op.type](op) |
| return True |
| |
| @staticmethod |
| def constraint_tens_defined_shape(op): |
| "Input(s) and Output Tensors must have a defined shape" |
| valid = True |
| extra = [] |
| tensors = [tens for tens in op.inputs + op.outputs if tens] |
| for tens in tensors: |
| if not tens.has_fully_defined_shape(): |
| valid = False |
| extra.append("Tensor '{}' has shape: {}".format(tens.name, tens.shape)) |
| return valid, ", ".join(extra) |
| |
| @staticmethod |
| def constraint_tens_output_shapeless(op): |
| "Scalar or Broadcasting Tensors are only valid for Input Tensors" |
| valid = True |
| extra = [] |
| for tens in op.outputs: |
| if tens.shape == []: |
| valid = False |
| extra.append("Output Tensor '{}' is shapeless".format(tens.name)) |
| return valid, ", ".join(extra) |
| |
| @classmethod |
| @docstring_format_args([shapeless_input_ops]) |
| def constraint_tens_input_shapeless(cls, op): |
| "Scalar or Broadcasting Input Tensors are only valid for op type: {}" |
| valid = True |
| extra = [] |
| tensors = [tens for tens in op.inputs if tens] |
| for tens in tensors: |
| if (tens.shape == []) and (op.type not in cls.shapeless_input_ops): |
| valid = False |
| extra.append(tens.name) |
| extra = "Op '{}' has shapeless input tensor(s): {}".format(op.name, ", ".join(extra)) |
| return valid, extra |
| |
| @staticmethod |
| def constraint_tens_shape_size(op): |
| "Input(s) and Output Tensors must not be greater than 4D" |
| valid = True |
| extra = [] |
| tensors = [tens for tens in op.inputs + op.outputs if tens] |
| for tens in tensors: |
| if len(tens.shape) > 4: |
| valid = False |
| extra.append("Tensor '{}' has shape: {}".format(tens.name, tens.shape)) |
| return valid, ", ".join(extra) |
| |
| @classmethod |
| @docstring_format_args([supported_dtypes]) |
| def constraint_tens_dtype(cls, op): |
| "Tensors must be of type: {}" |
| valid = True |
| extra = [] |
| tensors = [tens for tens in op.get_ifm_ifm2_weights_ofm() if tens] |
| tensors = tensors if tensors else op.inputs |
| for tens in tensors: |
| if tens.dtype not in cls.supported_dtypes: |
| valid = False |
| extra.append("Tensor '{}' has data type: {}".format(tens.name, tens.dtype)) |
| return valid, ", ".join(extra) |
| |
| @classmethod |
| @docstring_format_args([supported_int32_tensor_ops]) |
| def constraint_tens_int32_ops(cls, op): |
| "Tensors which are int32 are only valid when op type is: {}" |
| valid = True |
| extra = [] |
| tensors = [tens for tens in op.get_ifm_ifm2_weights_ofm() if tens] |
| tensors = tensors if tensors else op.inputs |
| for tens in tensors: |
| if (tens.dtype == DataType.int32) and (op.type not in cls.supported_int32_tensor_ops): |
| valid = False |
| extra.append(tens.name) |
| extra = "Op '{}' has int32 tensor(s): {}".format(op.name, ", ".join(extra)) |
| return valid, extra |
| |
| @classmethod |
| @docstring_format_args(tens_dim_range) |
| def constraint_tens_dimension(cls, op): |
| "Tensor dimensions must be in the range {}-{} (inclusive)" |
| tens_min, tens_max = cls.tens_dim_range |
| valid = True |
| extra = [] |
| tensors = [tens for tens in op.get_ifm_ifm2_weights_ofm() if tens] |
| tensors = tensors if tensors else op.inputs |
| for tens in tensors: |
| if not all(tens_min <= dim <= tens_max for dim in tens.shape): |
| valid = False |
| extra.append("Tensor '{}' has shape: {}".format(tens.name, tens.shape)) |
| return valid, ", ".join(extra) |
| |
| @staticmethod |
| def constraint_tens_quant_none_check(op): |
| "Tensors must have quantization parameters" |
| valid = True |
| extra = [] |
| tensors = [tens for tens in op.get_ifm_ifm2_weights_ofm() if tens] |
| for tens in tensors: |
| if tens.quantization is None: |
| valid = False |
| extra.append("Tensor '{}' has no quantization parameters".format(tens.name)) |
| return valid, ", ".join(extra) |
| |
| @staticmethod |
| def constraint_tens_quant_scale(op): |
| "Tensors with quantization scales must be finite" |
| valid = True |
| extra = [] |
| tensors = [tens for tens in op.get_ifm_ifm2_weights_ofm() if tens] |
| for tens in tensors: |
| if (tens.quantization.scale_f32 is not None) and np.isinf(tens.quantization.scale_f32).any(): |
| valid = False |
| extra.append("Tensor '{}' has quantization scale: {}".format(tens.name, tens.quantization.scale_f32)) |
| return valid, ", ".join(extra) |
| |
| @classmethod |
| @docstring_format_args([supported_fused_activations]) |
| def constraint_faf(cls, op): |
| "The fused activation function (if present) must be one of type: {}" |
| faf = op.activation |
| valid = (faf is None) or (faf in cls.supported_fused_activations) |
| extra = "Op '{}' has its fused activation function as: {}".format(op.name, faf) |
| return valid, extra |
| |
| @classmethod |
| def check_convolution_restrictions(cls, op): |
| # check stride |
| stride_w, stride_h = op.attrs["stride_w"], op.attrs["stride_h"] |
| if not is_integer(stride_w) or not is_integer(stride_h): |
| print("Warning:", op.type, "has non-integer stride, placing on CPU") |
| return False |
| if not 1 <= stride_w <= 3 or not 1 <= stride_h <= 3: |
| print( |
| "Warning: {} has stride ({}, {}), only strides in range [1, 3] are allowed. Placing on CPU".format( |
| op.type, stride_w, stride_h |
| ) |
| ) |
| 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 not is_integer(dilation_w_factor) or not is_integer(dilation_h_factor): |
| print("Warning:", op.type, "has non-integer dilation factor, placing on CPU") |
| return False |
| if not 1 <= dilation_w_factor <= 2 or not 1 <= dilation_h_factor <= 2: |
| print( |
| "Warning:", |
| op.type, |
| "has dilation factors ({}, {}), only factors in range [1, 2] are allowed. Placing on CPU".format( |
| dilation_w_factor, dilation_h_factor |
| ), |
| ) |
| return False |
| |
| # check data type |
| ifm_tensor, _, weight_tensor, bias_tensor, _ = op.get_ifm_ifm2_weights_biases_ofm() |
| if weight_tensor.element_size() > 1: |
| print("Warning: only 8-bit weights are supported, placing on CPU") |
| return False |
| |
| if not cls.check_bias_restrictions(bias_tensor): |
| return False |
| |
| # check kernel size [HWIO] |
| dilated_weight_w = (weight_tensor.shape[1] - 1) * dilation_w_factor + 1 |
| dilated_weight_h = (weight_tensor.shape[0] - 1) * dilation_h_factor + 1 |
| |
| # kernel limits |
| if not 1 <= dilated_weight_h <= 64: |
| print("Warning:", op.type, "has kernel height outside of range [1, 64], placing on CPU") |
| return False |
| if not 1 <= dilated_weight_w * dilated_weight_h <= 64 * 64: |
| print( |
| "Warning: product of kernel width and height must be >= 1 and not exceed 64 * 64 ({}),".format(64 * 64), |
| "placing on CPU", |
| ) |
| return False |
| |
| # check non const weights |
| if weight_tensor.values is None: |
| print("Warning:", op.type, "has non-constant weights, placing on CPU") |
| return False |
| |
| # check weight sums over [HWI] |
| zero_point = weight_tensor.quantization.zero_point |
| quant_weights = weight_tensor.quant_values.astype(np.int64) |
| weights = quant_weights - zero_point |
| totals = np.sum(np.absolute(weights), axis=(0, 1, 2)) |
| |
| if np.amax(totals) > 127 * 65536: |
| print("Warning: sum of weights exceeds 127 * 65536 ({}), placing on CPU".format(127 * 65536)) |
| return False |
| |
| # check batch size |
| if ifm_tensor.shape[0] != 1: |
| print("Warning: only batch sizes of 1 are supported, placing on CPU") |
| return False |
| |
| return True |
| |
| @classmethod |
| def check_depthwise_convolution_restrictions(cls, op): |
| # check depth |
| ifm_tensor, ofm_tensor = op.get_ifm_ofm() |
| if op.attrs["depth_multiplier"] > 1 and not ( |
| (ifm_tensor.shape[3] == 1) and (ofm_tensor.shape[3] == op.attrs["depth_multiplier"]) |
| ): |
| print( |
| "Warning: for depth multipliers > 1,", |
| "number of input channels must be 1 and number of output channels must be equal to depth multiplier.", |
| "Placing on CPU", |
| ) |
| return False |
| return cls.check_convolution_restrictions(op) |
| |
| @classmethod |
| def check_transpose_convolution_restrictions(cls, op): |
| # check stride |
| stride_h, stride_w = op.attrs["stride_h"], op.attrs["stride_w"] |
| if stride_h != 2 or stride_w != 2: |
| print("Warning: stride must be equal to 2, placing on CPU") |
| 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): |
| print( |
| "Warning: for", |
| op.type, |
| "using SAME padding, output dimensions must equal input dimensions multiplied by stride.", |
| "Placing on CPU", |
| ) |
| 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) |
| ): |
| print( |
| "Warning: for", |
| op.type, |
| "using VALID padding, output dimensions must equal input dimensions multiplied by stride,", |
| "minus difference between kernel size and stride. Placing on CPU", |
| ) |
| return False |
| |
| return cls.check_convolution_restrictions(op) |
| |
| @classmethod |
| def check_pooling_restrictions(cls, op): |
| # check stride |
| stride_w, stride_h = op.attrs["stride_w"], op.attrs["stride_h"] |
| if not is_integer(stride_w) or not is_integer(stride_h): |
| print("Warning:", op.type, "has non-integer stride, placing on CPU") |
| return False |
| if not 1 <= stride_w <= 3 or not 1 <= stride_h <= 3: |
| print( |
| "Warning: {} has stride ({}, {}), only strides in range [1, 3] are allowed. Placing on CPU".format( |
| op.type, stride_w, stride_h |
| ) |
| ) |
| return False |
| |
| # check data type |
| ifm_tensor, ofm_tensor = op.get_ifm_ofm() |
| if ifm_tensor.dtype != ofm_tensor.dtype: |
| if op.type != Op.ReduceSum: |
| print("Warning: input data type doesn't match output data type, placing on CPU") |
| return False |
| # TODO: else check ReduceSum restrictions. |
| |
| # check batch size |
| if ifm_tensor.shape[0] != 1: |
| print("Warning: input batch size must be 1, placing on CPU") |
| return False |
| |
| # check kernel size |
| kernel_w, kernel_h = op.attrs["filter_width"], op.attrs["filter_height"] |
| if op.type in cls.avg_pooling_ops and op.attrs["padding"] == b"SAME": |
| if not 1 <= kernel_w <= 8 or not 1 <= kernel_h <= 8: |
| print( |
| "Warning:", |
| op.type, |
| "has kernel size ({}, {}), only kernel sizes in range [1, 8] are allowed. Placing on CPU".format( |
| kernel_w, kernel_h |
| ), |
| ) |
| return False |
| if op.type in cls.avg_pooling_ops and op.attrs["padding"] == b"VALID" or op.type in cls.max_pooling_ops: |
| if not 1 <= kernel_w * kernel_h <= 256 * 256: |
| print( |
| "Warning: product of kernel width and height must be >= 1 and not exceed 256 * 256 ({}),".format( |
| 256 * 256 |
| ), |
| "placing on CPU", |
| ) |
| return False |
| if not 1 <= kernel_h <= 256: |
| print("Warning:", op.type, "has kernel height outside of range [1, 256], placing on CPU") |
| return False |
| |
| return True |
| |
| @classmethod |
| def check_resize_restrictions(cls, op): |
| # check unsupported upscaling factor |
| if op.type == Op.ResizeBilinear: |
| if op.inputs[0].shape[1] == 1 and op.inputs[0].shape[2] == 1: |
| return True |
| if op.inputs[0].shape == op.outputs[0].shape: |
| return True |
| upscaled_shape = np.array(op.inputs[0].shape[1:3]) |
| out_shape = np.array(op.outputs[0].shape[1:3]) |
| while (upscaled_shape < out_shape).all(): |
| upscaled_shape *= 2 |
| if op.attrs["align_corners"]: |
| upscaled_shape -= 1 |
| if np.array_equal(out_shape, upscaled_shape): |
| return True |
| return False |
| |
| @classmethod |
| def check_vector_product_restrictions(cls, op): |
| # check data type |
| ifm_tensor, _, weight_tensor, bias_tensor, _ = op.get_ifm_ifm2_weights_biases_ofm() |
| if weight_tensor.element_size() > 1: |
| print("Warning: only 8-bit datatypes supported for {}, placing on CPU".format(op.type)) |
| return False |
| |
| if not cls.check_bias_restrictions(bias_tensor): |
| return False |
| |
| # check non const weights |
| if weight_tensor.values is None: |
| print("Warning:", op.type, "has non-const weights, placing on CPU") |
| return False |
| |
| return True |
| |
| @classmethod |
| def check_element_wise_restrictions(cls, 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 cls.binary_elem_wise_min_max_ops | cls.unary_elem_wise_main_ops |
| and ifm_tensor.dtype != ofm_tensor.dtype |
| ): |
| print("Warning:", op.type, "must have same input and output datatype, placing on CPU") |
| return False |
| if op.type in cls.binary_elem_wise_add_mul_sub: |
| # both inputs must have same type |
| if ifm_tensor.dtype != ifm2_tensor.dtype: |
| print("Warning:", op.type, "must have same datatype on both inputs, placing on CPU") |
| return False |
| # signed input check |
| if ifm_tensor.dtype.type & BaseType.Signed: |
| # output must be signed |
| if ofm_tensor.dtype.type & BaseType.Unsigned: |
| print("Warning: only signed output types supported for {}, placing on CPU".format(op.type)) |
| return False |
| # and 8, 16 or 32-bit |
| bit_lengths = {8, 16, 32} |
| if ofm_tensor.element_size() * 8 not in bit_lengths: |
| print( |
| "Warning:", op.type, "is only supported for bit lengths {}, placing on CPU".format(bit_lengths) |
| ) |
| 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 |
| ): |
| print("Warning:", op.type, "has unsigned input but output is not unsigned or int32, placing on CPU") |
| return False |
| elif op.type in cls.binary_elem_wise_shift_ops: |
| if ifm_tensor.dtype != DataType.int32 or ifm2_tensor.dtype != DataType.int32: |
| print("Warning:", op.type, "input datatypes are not int32, placing on CPU") |
| return False |
| if op.type in (Op.CLZ, Op.SHL) and ofm_tensor.dtype != DataType.int32: |
| print("Warning:", op.type, "output datatype is not int32, placing on CPU") |
| return False |
| |
| # check batch size |
| if len(ifm_tensor.shape) > 2 and ifm_tensor.shape[0] != 1: |
| print( |
| "Warning:", |
| op.type, |
| "only supports batch size 1 for tensors with more than 2 dimensions, placing on CPU", |
| ) |
| return False |
| if op.type in cls.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: |
| print( |
| "Warning:", |
| op.type, |
| "only supports batch size 1 for tensors with more than 2 dimensions, placing on CPU", |
| ) |
| return False |
| |
| # negative alpha values are not supported |
| if op.type == Op.LeakyRelu and op.attrs["alpha"] < 0: |
| print("Warning:", op.type, "has negative alpha, placing on CPU") |
| return False |
| |
| # check if ifm or ifm2 has ofm shape |
| if ifm_tensor.shape != ofm_tensor.shape and ifm2_tensor.shape != ofm_tensor.shape: |
| print("Warning:", op.type, "input shape(s) differ from output shape, placing on CPU") |
| return False |
| |
| if op.type in cls.binary_elem_wise_min_max_ops and not cls.check_quantization_restrictions_binary_elem_wise(op): |
| return False |
| |
| return True |
| |
| @classmethod |
| def check_memory_only_restrictions(cls, op): |
| if op.type == Op.StridedSlice: |
| if len(op.inputs) != 4: |
| warn_cpu(op, "has {} input tensors, only 4 inputs are supported".format(len(op.inputs))) |
| return False |
| input_tens, begin_tens, end_tens, strides_tens = op.inputs |
| if begin_tens.values is None or end_tens.values is None or strides_tens.values is None: |
| warn_cpu(op, "has a non-constant begin, end, or stride input tensor, which is not supported") |
| return False |
| if not ( |
| len(input_tens.shape) |
| == len(op.outputs[0].shape) |
| == len(begin_tens.values) |
| == len(end_tens.values) |
| == len(strides_tens.values) |
| ): |
| warn_cpu(op, "has input tensors with shapes that are not supported") |
| return False |
| # check stride size |
| if any(stride != 1 for stride in strides_tens.values): |
| warn_cpu(op, "has stride values {}, only stride 1 values are supported".format(strides_tens.values)) |
| return False |
| # check ellipsis_mask |
| if op.attrs["ellipsis_mask"] != 0: |
| warn_cpu(op, "ellipsis_mask is {}, only 0 is supported".format(op.attrs["ellipsis_mask"])) |
| 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: |
| warn_cpu(op, "new_axis_mask and shrink_axis_mask are both non-zero, which is not supported") |
| return False |
| # Calculate offset start/end |
| offset_start = get_slice_offsets(input_tens.shape, begin_tens, op.attrs["begin_mask"], is_begin=True) |
| offset_end = get_slice_offsets(input_tens.shape, end_tens, op.attrs["end_mask"], is_begin=False) |
| # check "end - begin" doesn't result in any zero or negative elements |
| if any((end - begin) <= 0 for begin, end in zip(offset_start, offset_end)): |
| warn_cpu( |
| op, |
| "has slice begin values {}, some of which are >= end values {}, which is illegal".format( |
| begin_tens.values, end_tens.values |
| ), |
| ) |
| return False |
| if op.type == Op.SplitV: |
| # check that maximum one size is set to -1, indicating that size should be inferred |
| sizes = op.inputs[1].values |
| num_to_be_inferred = 0 |
| for size in sizes: |
| if size == -1: |
| num_to_be_inferred += 1 |
| |
| if num_to_be_inferred > 1: |
| print("Warning:", op.type, "has more than one size to be inferred, which is illegal, placing on CPU") |
| return False |
| if op.type in set((Op.Concat, Op.ConcatTFLite,)): |
| axis = op.attrs.get("axis", None) |
| if axis is None: |
| print("Warning:", op.type, "invalid or missing axis, placing on CPU") |
| return False |
| if axis < 0: |
| axis += len(op.inputs[0].shape) |
| if not 0 <= axis < len(op.inputs[0].shape): |
| print("Warning:", op.type, "invalid axis", axis, ", placing on CPU") |
| return False |
| ofm = op.outputs[0] |
| ofm_dims = len(ofm.shape) |
| for ifm in op.inputs: |
| if len(ifm.shape) != ofm_dims: |
| return False |
| for i in range(ofm_dims): |
| if i != axis and ifm.shape[i] != ofm.shape[i]: |
| print( |
| "Warning:", |
| op.type, |
| "invalid ifm:", |
| ifm.name, |
| ifm.shape, |
| "mismatch in dimension", |
| i, |
| ", placing on CPU", |
| ) |
| return False |
| |
| return True |
| |
| @classmethod |
| def check_quantization_restrictions_binary_elem_wise(cls, op): |
| # makes sure IFM1, IFM2 and OFM quantization are equal for binary ops |
| assert len(op.inputs) >= 2 and len(op.outputs) == 1 |
| |
| if ( |
| op.inputs[0].quantization is None |
| or not op.inputs[0].is_scaling_equal(op.inputs[1]) |
| or not op.inputs[0].is_scaling_equal(op.outputs[0]) |
| ): |
| print( |
| "Warning: Input/output tensors with different quantization is unsupported for the", op.type, "operator" |
| ) |
| return False |
| |
| return True |
| |
| @classmethod |
| def check_activation_ops(cls, op): |
| if op.type == Op.Softmax: |
| ifm_tensor = op.inputs[0] |
| ofm_tensor = op.outputs[0] |
| |
| # check data type |
| if ifm_tensor.dtype != ofm_tensor.dtype: |
| print("Warning:", op.type, "input type differs from output type, placing on CPU") |
| return False |
| |
| if ifm_tensor.dtype not in (DataType.uint8, DataType.int8, DataType.int16): |
| print( |
| "Warning: only datatypes supported for {} are uint8, int8 and int16; placing on CPU".format(op.type) |
| ) |
| return False |
| |
| # check shape |
| if ifm_tensor.shape != ofm_tensor.shape: |
| print("Warning:", op.type, "input shape differs from output shape, placing on CPU") |
| return False |
| |
| return True |
| |
| @classmethod |
| def check_bias_restrictions(cls, bias_tensor): |
| # check data type |
| if bias_tensor is not None and bias_tensor.dtype not in (DataType.int32, DataType.int64): |
| print("Warning: bias tensor datatype must be int32 or int64, placing on CPU") |
| return False |
| |
| # check if values fits in 40-bit |
| if bias_tensor is not None and bias_tensor.dtype == DataType.int64: |
| for quant_value in bias_tensor.quant_values: |
| if not (-(1 << 39) <= quant_value < (1 << 39)): |
| print("Warning: bias tensor values are larger than 40 bits, placing on CPU") |
| return False |
| |
| return True |