# SPDX-FileCopyrightText: Copyright 2022 Arm Limited and/or its affiliates # # 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 scaling from ethosu.vela.scaling import quantise_scale from ethosu.vela.scaling import reduced_quantise_scale def test_scaling(): multiplier, shift = quantise_scale(1) assert multiplier == 1073741824 and shift == 30 multiplier, shift = quantise_scale(0.5) assert multiplier == 1073741824 and shift == 31 multiplier, shift = quantise_scale(0.001) assert multiplier == 1099511628 and shift == 40 multiplier, shift = quantise_scale(0.008) assert multiplier == 1099511628 and shift == 37 multiplier, shift = quantise_scale(0.00097652) assert multiplier == 2147390190 and shift == 41 multiplier, shift = quantise_scale(0.0009765615959827986) assert multiplier == 2147481660 and shift == 41 def test_reduced_scaling(): multiplier, shift = reduced_quantise_scale(1) assert multiplier == 16384 and shift == 14 multiplier, shift = reduced_quantise_scale(0.5) assert multiplier == 16384 and shift == 15 multiplier, shift = reduced_quantise_scale(0.001) assert multiplier == 16777 and shift == 24 multiplier, shift = reduced_quantise_scale(0.008) assert multiplier == 16777 and shift == 21 multiplier, shift = reduced_quantise_scale(0.00097652) assert multiplier == 32767 and shift == 25 # multiplier saturated multiplier, shift = reduced_quantise_scale(0.0009765615959827986) assert multiplier == 32767 and shift == 25