chore: import upstream snapshot with attribution

tensorflow/lite/cmake/DownloadFP16.cmake

@@ -0,0 +1,35 @@
+#
+# Copyright 2024 The TensorFlow Authors. All Rights Reserved.
+#
+# 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
+#
+#      https://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.
+
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5 FATAL_ERROR)
+
+PROJECT(fp16-download NONE)
+
+# Set file timestamps to the time of extraction.
+IF(POLICY CMP0135)
+  CMAKE_POLICY(SET CMP0135 NEW)
+ENDIF()
+
+INCLUDE(ExternalProject)
+ExternalProject_Add(fp16
+  URL https://github.com/Maratyszcza/FP16/archive/0a92994d729ff76a58f692d3028ca1b64b145d91.zip
+  URL_HASH SHA256=e66e65515fa09927b348d3d584c68be4215cfe664100d01c9dbc7655a5716d70
+  SOURCE_DIR "${CMAKE_BINARY_DIR}/FP16-source"
+  BINARY_DIR "${CMAKE_BINARY_DIR}/FP16"
+  CONFIGURE_COMMAND ""
+  BUILD_COMMAND ""
+  INSTALL_COMMAND ""
+  TEST_COMMAND ""
+)

tensorflow/lite/cmake/DownloadPThreadPool.cmake

@@ -0,0 +1,30 @@
+#
+# Copyright 2022 The TensorFlow Authors. All Rights Reserved.
+#
+# 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
+#
+#      https://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.
+
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5 FATAL_ERROR)
+
+PROJECT(pthreadpool-download NONE)
+
+INCLUDE(ExternalProject)
+ExternalProject_Add(pthreadpool
+  URL https://github.com/google/pthreadpool/archive/9003ee6c137cea3b94161bd5c614fb43be523ee1.zip
+  URL_HASH SHA256=00a9a1c633f62290a22ea1db42c4401dffe9f05645fb66d6609ae46a05333a2a
+  SOURCE_DIR "${CMAKE_BINARY_DIR}/pthreadpool-source"
+  BINARY_DIR "${CMAKE_BINARY_DIR}/pthreadpool"
+  CONFIGURE_COMMAND ""
+  BUILD_COMMAND ""
+  INSTALL_COMMAND ""
+  TEST_COMMAND ""
+)