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+# 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:
+# Unit tests for support_operators
+from ethosu.vela.data_type import DataType
+from ethosu.vela.supported_operators import SupportedOperators
+from ethosu.vela.tensor import create_const_tensor
+from ethosu.vela.tensor import Tensor
+from ethosu.vela.test import testutil
+
+support = SupportedOperators()
+
+
+def create_strided_slice_op(in_shape, out_shape, start_offsets, end_offsets):
+ in0 = Tensor(in_shape, DataType.uint8, "in")
+ in1 = create_const_tensor("begin", [len(start_offsets)], DataType.uint8, start_offsets)
+ in2 = create_const_tensor("end", [len(end_offsets)], DataType.uint8, end_offsets)
+ in3 = create_const_tensor("strides", [len(end_offsets)], DataType.uint8, len(end_offsets) * [1])
+ out = Tensor(out_shape, DataType.uint8, "out")
+ attrs = {"ellipsis_mask": 0, "new_axis_mask": 0, "shrink_axis_mask": 0, "begin_mask": 0, "end_mask": 0}
+ return testutil.create_op("StridedSlice", [in0, in1, in2, in3], out, attrs=attrs)
+
+
+def create_strided_slice():
+ # Creates a valid strided slice operator with some valid inputs/outputs
+ op = create_strided_slice_op([1, 10, 10, 10], [1, 5, 5, 10], [127, 2, 2, 0], [0, 7, -3, 0])
+ op.attrs["begin_mask"] = 1
+ op.attrs["end_mask"] = 9
+ assert support.is_operator_supported(op)
+ return op
+
+
+def test_strided_slice():
+ # Tests support for StridedSlice operator
+ op = create_strided_slice()
+ # Setting one of new_axis_mask/shrink_axis_mask to non-zero is ok
+ op.attrs["new_axis_mask"] = 2
+ assert support.is_operator_supported(op)
+ op = create_strided_slice()
+ op.attrs["shrink_axis_mask"] = 3
+ assert support.is_operator_supported(op)
+ # But setting both to non-zero is not supported
+ op.attrs["new_axis_mask"] = 2
+ assert not support.is_operator_supported(op)
+ # begin values must not be None
+ op.inputs[1].values = None
+ assert not support.is_operator_supported(op)
+ # Unsupported strides
+ op = create_strided_slice()
+ op.inputs[3].values = [1, 1, 2, 1]
+ assert not support.is_operator_supported(op)
+ # Wrong number of input tensors
+ op = create_strided_slice()
+ op.add_input_tensor(op.inputs[0].clone())
+ assert not support.is_operator_supported(op)
+ # Unsupported ellipsis mask
+ op = create_strided_slice()
+ op.attrs["ellipsis_mask"] = 1
+ assert not support.is_operator_supported(op)
+ # Examples where end offset <= begin offset
+ op = create_strided_slice()
+ op.inputs[1].values = [0, 7, 2, 0]
+ assert not support.is_operator_supported(op)
+ op = create_strided_slice()
+ op.inputs[2].values = [0, 7, 2, 0]
+ assert not support.is_operator_supported(op)
+ op = create_strided_slice()
+ op.attrs["begin_mask"] = 0
+ assert not support.is_operator_supported(op)
+ op = create_strided_slice()
+ op.attrs["end_mask"] = 0
+ assert not support.is_operator_supported(op)