[EXTAPI] exposing encode of biases to be consumed by an external API
*Renamed pack_bias_and_scale to encode_bias to be consumed externally
*added unit test for the API
Change-Id: I71829f3fcb390c475795848f0be3d132d3e158ee
Signed-off-by: Manupa Karunaratne <manupa.karunaratne@arm.com>
diff --git a/ethosu/vela/test/extapi/test_extapi_encode_bias.py b/ethosu/vela/test/extapi/test_extapi_encode_bias.py
new file mode 100644
index 0000000..59b8587
--- /dev/null
+++ b/ethosu/vela/test/extapi/test_extapi_encode_bias.py
@@ -0,0 +1,43 @@
+# 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:
+# Contains unit tests for encode_biases API for an external consumer
+import random
+
+import numpy as np
+
+from ethosu.vela.weight_compressor import encode_bias
+
+
+def test_encode_bias():
+ bias_lower_limit = -(1 << (40 - 1))
+ bias_upper_limit = (1 << (40 - 1)) - 1
+ scale_lower_limit = 0
+ scale_upper_limit = (1 << 32) - 1
+ shift_lower_limit = 0
+ shift_upper_limit = (1 << 6) - 1
+
+ for _ in range(30):
+ bias = np.int64(random.randint(bias_lower_limit, bias_upper_limit))
+ scale = int(random.randint(scale_lower_limit, scale_upper_limit))
+ shift = int(random.randint(shift_lower_limit, shift_upper_limit))
+ biases_enc = encode_bias(bias, scale, shift)
+ assert isinstance(biases_enc, bytearray)
+ assert len(biases_enc) == 10
+
+
+if __name__ == "__main__":
+ test_encode_bias()