Add some ideas.

contrib/gfx/CMakeLists.txt

@@ -0,0 +1,310 @@
+# ******************************************************************************
+# Copyright 2017-2020 Intel Corporation
+#
+# 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
+#
+#     http://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 3.18)
+
+message(STATUS "CMAKE_VERSION: ${CMAKE_VERSION}")
+
+# set directory where the custom finders live
+set(NGRAPH_BASE_DIR ${CMAKE_CURRENT_LIST_DIR}/../..)
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${NGRAPH_BASE_DIR}/cmake/Modules/")
+get_property(GFX_GENERATOR_IS_MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(NOT GFX_GENERATOR_IS_MULTI_CONFIG)
+    if (CMAKE_BUILD_TYPE)
+        set(RELEASE_TYPES Debug Release RelWithDebInfo MinSizeRel)
+        list(FIND RELEASE_TYPES ${CMAKE_BUILD_TYPE} INDEX_FOUND)
+        if (${INDEX_FOUND} EQUAL -1)
+            message(FATAL_ERROR "CMAKE_BUILD_TYPE must be one of Debug, Release, RelWithDebInfo, or MinSizeRel")
+        endif()
+    endif()
+endif()
+
+if (UNIX AND NOT APPLE)
+    set(LINUX TRUE)
+endif()
+
+# Enable <PackageName>_ROOT for CMake 3.12+
+cmake_policy(SET CMP0074 NEW)
+
+if (APPLE)
+    # Enable MACOS_RPATH by default.
+    cmake_policy(SET CMP0042 NEW)
+    # Enable CMAKE_<LANG>_COMPILER_ID AppleClang
+    cmake_policy(SET CMP0025 NEW)
+    # APPLE: Set CMAKE_OSX_SYSROOT if not set already.
+    cmake_policy(SET CMP0074 NEW)
+    execute_process(COMMAND sw_vers -productVersion
+        OUTPUT_VARIABLE OSX_FULL_VERSION
+        OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+    string(REGEX REPLACE "^([0-9]+\\.[0-9]+).*$" "\\1"
+        OSX_SHORT_VERSION "${OSX_FULL_VERSION}")
+
+    message(STATUS "Detected: OSX ${OSX_SHORT_VERSION}")
+
+    if (CMAKE_OSX_SYSROOT)
+        message(STATUS "Using CMAKE_OSX_SYSROOT: ${CMAKE_OSX_SYSROOT}")
+    else()
+        execute_process(COMMAND xcode-select -p
+            OUTPUT_VARIABLE APPLE_DEV_DIR
+            OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+        if("${APPLE_DEV_DIR}" STREQUAL "/Library/Developer/CommandLineTools")
+            # Command line tools only
+            set(XCODE_ISYSROOT ${APPLE_DEV_DIR}/SDKs/MacOSX.sdk)
+            message(STATUS "Trying command line tool sdk at ${XCODE_ISYSROOT}.")
+            if(NOT EXISTS ${XCODE_ISYSROOT})
+                message(FATAL_ERROR "Cannot find macos sdk.")
+            endif()
+        else()
+            # Xcode is installed
+            set(XCODE_ISYSROOT ${APPLE_DEV_DIR}/Platforms/MacOSX.platform/Developer/SDKs/MacOSX${OSX_SHORT_VERSION}.sdk)
+            message(STATUS "Trying Xcode sdk at ${XCODE_ISYSROOT}.")
+            if(NOT EXISTS ${XCODE_ISYSROOT})
+                set(XCODE_ISYSROOT ${APPLE_DEV_DIR}/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk)
+                if(NOT EXISTS ${XCODE_ISYSROOT})
+                    message(FATAL_ERROR "Cannot find macos sdk.")
+                endif()
+            endif()
+        endif()
+        message(STATUS "Setting CMAKE_OSX_SYSROOT for macos ${OSX_SHORT_VERSION} to ${XCODE_ISYSROOT}")
+        set(CMAKE_OSX_SYSROOT ${XCODE_ISYSROOT})
+    endif()
+endif()
+
+project (gfx LANGUAGES CXX VERSION 10.0.0)
+
+# Tells if ngraph source tree is embedded in some other project
+# TRUE if embedded in source tree
+# FALSE if used standalone or as an external project
+if(NOT ("${CMAKE_SOURCE_DIR}" STREQUAL "${PROJECT_SOURCE_DIR}"))
+    set(GFX_IS_EMBEDDED TRUE)
+else()
+    set(GFX_IS_EMBEDDED FALSE)
+endif()
+
+if(PROJECT_SOURCE_DIR STREQUAL PROJECT_BINARY_DIR)
+    message(FATAL_ERROR "In-source builds are not allowed.")
+endif()
+
+if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+  set(CMAKE_INSTALL_PREFIX "${PROJECT_BINARY_DIR}/local" CACHE PATH "..." FORCE)
+endif()
+
+set(GFX_CXX_STANDARD 17)
+if(CMAKE_CXX_STANDARD)
+    if(CMAKE_CXX_STANDARD VERSIONLESS GFX_CXX_STANDARD)
+        message(FATAL_ERROR "CMAKE_CXX_STANDARD ${CMAKE_CXX_STANDARD} is lower than ${GFX_CXX_STANDARD}.")
+    endif()
+endif()
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+# Create compilation database compile_commands.json
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+
+# Setup CMAKE_ARGS to be forwarded to External Projects
+set(GFX_FORWARD_CMAKE_ARGS
+    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+    -DCMAKE_CXX_STANDARD:STRING=${CMAKE_CXX_STANDARD}
+    -DCMAKE_CXX_STANDARD_REQUIRED:BOOL=${CMAKE_CXX_STANDARD_REQUIRED}
+    -DCMAKE_CXX_EXTENSIONS:BOOL=${CMAKE_CXX_EXTENSIONS}
+    -DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=${CMAKE_EXPORT_COMPILE_COMMANDS}
+    -DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=${CMAKE_POSITION_INDEPENDENT_CODE}
+    )
+
+if (CMAKE_OSX_SYSROOT)
+    set(GFX_FORWARD_CMAKE_ARGS
+            ${NGRAPH_FORWARD_CMAKE_ARGS}
+            -DCMAKE_OSX_SYSROOT=${CMAKE_OSX_SYSROOT}
+            )
+endif()
+
+if (NOT GFX_GENERATOR_IS_MULTI_CONFIG)
+    if(NOT CMAKE_BUILD_TYPE)
+        set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING "Build type" FORCE)
+    endif()
+
+    set(GFX_FORWARD_CMAKE_ARGS
+            ${GFX_FORWARD_CMAKE_ARGS}
+            -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
+            )
+endif()
+message(STATUS "GFX_FORWARD_CMAKE_ARGS ${GFX_FORWARD_CMAKE_ARGS}")
+
+#-----------------------------------------------------------------------------------------------
+# Installation logic...
+#-----------------------------------------------------------------------------------------------
+
+if (LINUX)
+    include(GNUInstallDirs)
+else()
+    set(CMAKE_INSTALL_BINDIR "bin")
+    set(CMAKE_INSTALL_INCLUDEDIR "include")
+    set(CMAKE_INSTALL_DOCDIR "doc")
+    set(CMAKE_INSTALL_LIBDIR "lib")
+endif()
+
+message(STATUS "Installation directory: ${CMAKE_INSTALL_PREFIX}")
+
+# Destinations
+if (LINUX)
+    if (DEFINED GFX_RPATH)
+        set(CMAKE_BUILD_RPATH "$ORIGIN:${NGRAPH_RPATH}")
+        set(CMAKE_INSTALL_RPATH "$ORIGIN:${NGRAPH_RPATH}")
+    else()
+        set(CMAKE_BUILD_RPATH "$ORIGIN")
+        set(CMAKE_INSTALL_RPATH "$ORIGIN")
+    endif()
+endif()
+
+#-----------------------------------------------------------------------------------------------
+# External projects install directory
+#-----------------------------------------------------------------------------------------------
+
+if (NOT GFX_BUILD_BASE_DIR)
+    set(GFX_BUILD_BASE_DIR ${PROJECT_BINARY_DIR})
+    set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${GFX_BUILD_BASE_DIR})
+    set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${NGRAPH_BUILD_DIR})
+    set(CMAKE_PDB_OUTPUT_DIRECTORY ${NGRAPH_BUILD_DIR})
+    set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${NGRAPH_BUILD_DIR})
+endif()
+
+#-----------------------------------------------------------------------------------------------
+# Compile Flags for xGraph...
+#-----------------------------------------------------------------------------------------------
+
+# Since UNIX support Bash we can use a Bash script to do the clang-format functions
+# This is much faster than the cmake method
+set(FORMAT_DIRS
+    ${PROJECT_SOURCE_DIR}/src
+    ${PROJECT_SOURCE_DIR}/test
+)
+if (UNIX)
+    add_custom_target(style-check
+        COMMAND
+        ${NGRAPH_BASE_DIR}/maint/check-code-format.sh ${FORMAT_DIRS}
+    )
+    add_custom_target(style-apply
+        COMMAND
+        ${NGRAPH_BASE_DIR}/maint/apply-code-format.sh ${FORMAT_DIRS}
+    )
+    add_custom_target(style
+        COMMAND
+        ${NGRAPH_BASE_DIR}/maint/apply-code-format.sh ${FORMAT_DIRS}
+    )
+else()
+    add_custom_target(style-check
+        COMMAND ${CMAKE_COMMAND}
+        -DNGRAPH_SOURCE_DIR="${PROJECT_SOURCE_DIR}"
+        -P ${NGRAPH_BASE_DIR}/cmake/Modules/style_check.cmake
+    )
+
+    add_custom_target(style-apply
+        COMMAND ${CMAKE_COMMAND}
+        -DNGRAPH_SOURCE_DIR="${PROJECT_SOURCE_DIR}"
+        -P ${NGRAPH_BASE_DIR}/cmake/Modules/style_apply.cmake
+    )
+
+    add_custom_target(style
+        COMMAND ${CMAKE_COMMAND}
+        -DNGRAPH_SOURCE_DIR="${PROJECT_SOURCE_DIR}"
+        -P ${NGRAPH_BASE_DIR}/cmake/Modules/style_apply.cmake
+    )
+endif()
+
+add_custom_target(fix-mode
+    COMMAND ${CMAKE_COMMAND}
+    -DNGRAPH_SOURCE_DIR="${PROJECT_SOURCE_DIR}"
+    -P ${NGRAPH_BBSE_DIR}/cmake/Modules/fix_mode.cmake
+)
+
+#-----------------------------------------------------------------------------------------------
+# enable or disable output from GFX_DEBUG statements
+#-----------------------------------------------------------------------------------------------
+if(GFX_DEBUG_ENABLE)
+    add_definitions(-DGFX_DEBUG_ENABLE)
+endif()
+
+#-----------------------------------------------------------------------------------------------
+# enable or disable deprecation warnings for old APIs
+#-----------------------------------------------------------------------------------------------
+if(GFX_DEPRECATED_ENABLE)
+    add_definitions(-DGFX_DEPRECATED_ENABLE)
+endif()
+
+add_definitions(-DPROJECT_ROOT_DIR="${PROJECT_SOURCE_DIR}")
+
+#-----------------------------------------------------------------------------------------------
+# Print Global Options
+#-----------------------------------------------------------------------------------------------
+get_directory_property(GFX_COMPILE_OPTIONS COMPILE_OPTIONS)
+message(STATUS "Compile Flags: ${NGRAPH_COMPILE_OPTIONS}")
+message(STATUS "Shared Link Flags: ${CMAKE_SHARED_LINKER_FLAGS}")
+message(STATUS "CMAKE_CXX_FLAGS_RELEASE ${CMAKE_CXX_FLAGS_RELEASE}")
+message(STATUS "CMAKE_CXX_FLAGS_DEBUG ${CMAKE_CXX_FLAGS_DEBUG}")
+message(STATUS "CMAKE_CXX_FLAGS_RELWITHDEBINFO ${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
+message(STATUS "CMAKE_CXX_FLAGS_MINSIZEREL ${CMAKE_CXX_FLAGS_MINSIZEREL}")
+
+#-----------------------------------------------------------------------------------------------
+# xGraph source tree
+#-----------------------------------------------------------------------------------------------
+
+add_subdirectory(src)
+
+add_subdirectory(test)
+
+#-----------------------------------------------------------------------------------------------
+# Export Config and Install
+#-----------------------------------------------------------------------------------------------
+
+# Not supported for now.
+return()
+
+include(CMakePackageConfigHelpers)
+
+export(TARGETS gfx NAMESPACE gfx:: FILE "${PROJECT_BINARY_DIR}/gfxTargets.cmake")
+
+install(EXPORT gfxTargets
+        FILE gfxTargets.cmake
+        NAMESPACE gfx::
+        DESTINATION ${NGRAPH_COMPONENT_PREFIX}cmake
+        COMPONENT gfx)
+
+configure_package_config_file(${PROJECT_SOURCE_DIR}/cmake/share/gfxConfig.cmake.in
+        ${PROJECT_BINARY_DIR}/ngraphConfig.cmake
+        INSTALL_DESTINATION cmake)
+
+write_basic_package_version_file(${PROJECT_BINARY_DIR}/gfxConfigVersion.cmake
+        VERSION ${GFX_VERSION}
+        COMPATIBILITY SameMajorVersion)
+
+install(FILES ${PROJECT_BINARY_DIR}/ngraphConfig.cmake
+        ${PROJECT_BINARY_DIR}/ngraphConfigVersion.cmake
+        DESTINATION ${NGRAPH_COMPONENT_PREFIX}cmake
+        COMPONENT gfx)
+
+install(DIRECTORY
+    ${PROJECT_SOURCE_DIR}/licenses
+    DESTINATION "${NGRAPH_COMPONENT_PREFIX}."
+    COMPONENT gfx
+)
+
+install(FILES ${PROJECT_SOURCE_DIR}/LICENSE DESTINATION "${GFX_COMPONENT_PREFIX}." COMPONENT gfx)
+install(FILES ${PROJECT_BINARY_DIR}/VERSION DESTINATION "${GFX_COMPONENT_PREFIX}." COMPONENT gfx)

contrib/gfx/design_doc/cpu_backend.txt

@@ -0,0 +1,6 @@
+Execution model:
+Multi-Thread + Vectorization
+Don't use OpenMP
+Parallel For
+Process affinity support
+Data parallelism across NUMA