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#
# SPDX-FileCopyrightText: Copyright 2021-2024 Arm Limited and/or its affiliates <open-source-office@arm.com>
#
# 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.
#
add_library(tflu STATIC)
# Tensorflow Lite Micro (TFLM) build variables.
set(TFLM_PATH "${TENSORFLOW_PATH}/tensorflow/lite/micro")
set(TFLM_BUILD_TYPE "release" CACHE STRING "TFLM build type, can be release, release_with_logs or debug")
set(TFLM_OPTIMIZATION_LEVEL "-O2" CACHE STRING "TFLM kernel optimization level")
set(TFLM_OPTIMIZE_KERNELS_FOR "speed" CACHE STRING "TFLM kernel implementation optimization type, can be speed or size")
#############################################################################
# Helpers
#############################################################################
include(FetchContent)
# Download third party
macro(download_third_party target)
cmake_policy(PUSH)
if(POLICY CMP0135)
cmake_policy(SET CMP0135 NEW)
endif()
cmake_parse_arguments(DOWNLOAD "" "URL;URL_MD5;SOURCE_DIR" "" ${ARGN})
message("Downloading ${DOWNLOAD_URL}")
FetchContent_Declare(${target}
URL ${DOWNLOAD_URL}
URL_MD5 ${DOWNLOAD_MD5}
SOURCE_DIR ${DOWNLOAD_SOURCE_DIR}
${PATCH_COMMAND})
FetchContent_GetProperties(${target})
if (NOT ${target}_POPULATED)
FetchContent_Populate(${target})
endif()
cmake_policy(POP)
endmacro()
function(tensorflow_source_exists RESULT TARGET SOURCE)
get_target_property(SOURCES ${TARGET} SOURCES)
# Loop over source files already added to this target
foreach(TMP ${SOURCES})
get_filename_component(SOURCE_NAME ${SOURCE} NAME)
get_filename_component(TMP_NAME ${TMP} NAME)
# Check if file already exists
if (${SOURCE_NAME} STREQUAL ${TMP_NAME})
set(${RESULT} TRUE PARENT_SCOPE)
return()
endif()
endforeach()
set(${RESULT} FALSE PARENT_SCOPE)
endfunction()
function(tensorflow_target_sources_glob TARGET GLOB UNIQUE)
foreach (EXPR ${ARGN})
# Find files matching globbing expression
file(${GLOB} SOURCES ${EXPR})
# Remove tests
list(FILTER SOURCES EXCLUDE REGEX ".*_test\.cc")
# Add files to target
foreach(SOURCE ${SOURCES})
tensorflow_source_exists(SOURCE_EXISTS ${TARGET} ${SOURCE})
if (NOT ${UNIQUE} OR NOT ${SOURCE_EXISTS})
target_sources(${TARGET} PRIVATE ${SOURCE})
endif()
endforeach()
endforeach()
endfunction()
#############################################################################
# Download thirdparty
#############################################################################
# Flatbuffers
# Synch revision with 'tensorflow/lite/micro/tools/make/flatbuffers_download.sh'
download_third_party(tensorflow-flatbuffers
URL "https://github.com/google/flatbuffers/archive/v23.5.26.zip"
URL_MD5 e87e8acd8e2d53653387ad78720316e2)
target_include_directories(tflu PUBLIC
${tensorflow-flatbuffers_SOURCE_DIR}/include)
target_compile_definitions(tflu PUBLIC
FLATBUFFERS_LOCALE_INDEPENDENT=0)
# Gemlowp
# Synch revision with 'tensorflow/lite/micro/tools/make/third_party_downloads.inc'
download_third_party(tensorflow-gemlowp
URL "https://github.com/google/gemmlowp/archive/719139ce755a0f31cbf1c37f7f98adcc7fc9f425.zip"
URL_MD5 7e8191b24853d75de2af87622ad293ba)
target_include_directories(tflu PUBLIC
${tensorflow-gemlowp_SOURCE_DIR})
# Ruy
# Synch revision with 'tensorflow/lite/micro/tools/make/third_party_downloads.inc'
download_third_party(tensorflow-ruy
URL "https://github.com/google/ruy/archive/d37128311b445e758136b8602d1bbd2a755e115d.zip"
URL_MD5 abf7a91eb90d195f016ebe0be885bb6e)
target_include_directories(tflu PUBLIC
${tensorflow-ruy_SOURCE_DIR})
#############################################################################
# CMSIS-NN
#############################################################################
if (NOT ${CORE_SOFTWARE_ACCELERATOR} STREQUAL "CPU")
add_subdirectory(${CMSIS_NN_PATH} cmsis_nn)
target_compile_options(cmsis-nn PRIVATE
${TFLM_OPTIMIZATION_LEVEL})
tensorflow_target_sources_glob(tflu GLOB TRUE
${TFLM_PATH}/kernels/cmsis_nn/*.cc)
target_include_directories(tflu PUBLIC
${CMSIS_NN_PATH})
target_compile_definitions(tflu PUBLIC
CMSIS_NN)
target_link_libraries(tflu PUBLIC
cmsis-nn)
endif()
#############################################################################
# Ethos-U
#############################################################################
if(TARGET ethosu_core_driver)
tensorflow_target_sources_glob(tflu GLOB TRUE
${TFLM_PATH}/kernels/ethos_u/*.cc)
target_link_libraries(tflu PUBLIC
ethosu_core_driver)
endif()
#############################################################################
# Cortex-M generic
#############################################################################
tensorflow_target_sources_glob(tflu GLOB TRUE
${TFLM_PATH}/cortex_m_generic/*.cc)
target_include_directories(tflu PRIVATE
${TFLM_PATH}/cortex_m_generic)
# For DWT/PMU counters
target_link_libraries(tflu PRIVATE cmsis_device)
target_compile_definitions(tflu PRIVATE ${ARM_CPU})
if(("${ARM_CPU}" STREQUAL "ARMCM55") OR ("${ARM_CPU}" STREQUAL "ARMCM85"))
target_compile_definitions(tflu PRIVATE
ARM_MODEL_USE_PMU_COUNTERS)
endif()
#############################################################################
# Tensorflow micro lite
#############################################################################
tensorflow_target_sources_glob(tflu GLOB TRUE
${TFLM_PATH}/*.cc
${TFLM_PATH}/arena_allocator/*.cc
${TFLM_PATH}/memory_planner/*.cc
${TFLM_PATH}/kernels/*.cc
${TFLM_PATH}/tflite_bridge/*.cc)
tensorflow_target_sources_glob(tflu GLOB_RECURSE FALSE
${TFLM_PATH}/../c/*.cc
${TFLM_PATH}/../core/*.cc
${TFLM_PATH}/../core/api/*.cc
${TFLM_PATH}/../kernels/*.cc
${TFLM_PATH}/../schema/*.cc)
target_include_directories(tflu PUBLIC
${TENSORFLOW_PATH})
target_compile_definitions(tflu PUBLIC
TF_LITE_STATIC_MEMORY
$<$<STREQUAL:${TFLM_BUILD_TYPE},release>:NDEBUG;TF_LITE_STRIP_ERROR_STRINGS>
$<$<STREQUAL:${TFLM_BUILD_TYPE},release_with_logs>:NDEBUG>
$<$<STREQUAL:${TFLM_OPTIMIZE_KERNELS_FOR},speed>:KERNELS_OPTIMIZED_FOR_SPEED>
$<$<STREQUAL:${TFLM_OPTIMIZE_KERNELS_FOR},size>:KERNELS_OPTIMIZED_FOR_SIZE>)
target_compile_options(tflu
PRIVATE
${TFLM_OPTIMIZATION_LEVEL}
-fno-unwind-tables
-ffunction-sections
-fdata-sections
-fmessage-length=0
-funsigned-char
"$<$<COMPILE_LANGUAGE:CXX>:-fno-rtti;-fno-exceptions;-fno-threadsafe-statics>"
-Wall
-Wextra
-Wdouble-promotion
-Wmissing-field-initializers
-Wshadow
-Wstrict-aliasing
-Wswitch
-Wunused-variable
-Wunused-function
-Wvla
PUBLIC
-Wno-cast-align
-Wno-null-dereference
-Wno-unused-parameter
-Wno-switch-default
)
# Install libraries and header files
install(TARGETS tflu DESTINATION "lib")
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