## ## Copyright (c) 2017, Alliance for Open Media. All rights reserved ## ## This source code is subject to the terms of the BSD 2 Clause License and ## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License ## was not distributed with this source code in the LICENSE file, you can ## obtain it at www.aomedia.org/license/software. If the Alliance for Open ## Media Patent License 1.0 was not distributed with this source code in the ## PATENTS file, you can obtain it at www.aomedia.org/license/patent. ## if (NOT AOM_BUILD_CMAKE_AOM_OPTIMIZATION_CMAKE_) set(AOM_BUILD_CMAKE_AOM_OPTIMIZATION_CMAKE_ 1) include("${AOM_ROOT}/build/cmake/util.cmake") # Translate $flag to one which MSVC understands, and write the new flag to the # variable named by $translated_flag (or unset it, when MSVC needs no flag). function (get_msvc_intrinsic_flag flag translated_flag) if ("${flag}" STREQUAL "-mavx") set(${translated_flag} "/arch:AVX" PARENT_SCOPE) elseif ("${flag}" STREQUAL "-mavx2") set(${translated_flag} "/arch:AVX2" PARENT_SCOPE) else () # MSVC does not need flags for intrinsics flavors other than AVX/AVX2. unset(${translated_flag} PARENT_SCOPE) endif () endfunction () # Adds an object library target. Terminates generation if $flag is not supported # by the current compiler. $flag is the intrinsics flag required by the current # compiler, and is added to the compile flags for all sources in $sources. # $opt_name is used to name the target. $target_to_update is made # dependent upon the created target. # # Note: the libaom target is always updated because OBJECT libraries have rules # that disallow the direct addition of .o files to them as dependencies. Static # libraries do not have this limitation. function (add_intrinsics_object_library flag opt_name target_to_update sources dependent_target) set(target_name ${target_to_update}_${opt_name}_intrinsics) add_library(${target_name} OBJECT ${${sources}}) if (MSVC) get_msvc_intrinsic_flag(${flag} "flag") endif () if (flag) target_compile_options(${target_name} PUBLIC ${flag}) endif () target_sources(${dependent_target} PRIVATE $) # Add the new lib target to the global list of aom library targets. list(APPEND AOM_LIB_TARGETS ${target_name}) set(AOM_LIB_TARGETS ${AOM_LIB_TARGETS} PARENT_SCOPE) endfunction () # Adds sources in list named by $sources to $target and adds $flag to the # compile flags for each source file. function (add_intrinsics_source_to_target flag target sources) target_sources(${target} PRIVATE ${${sources}}) if (MSVC) get_msvc_intrinsic_flag(${flag} "flag") endif () if (flag) foreach (source ${${sources}}) set_property(SOURCE ${source} APPEND PROPERTY COMPILE_FLAGS ${flag}) endforeach () endif () endfunction () # Writes object format for the current target to the var named by $out_format, # or terminates the build when the object format for the current target is # unknown. function (get_asm_obj_format out_format) if ("${AOM_TARGET_CPU}" STREQUAL "x86_64") if ("${AOM_TARGET_SYSTEM}" STREQUAL "Darwin") set(objformat "macho64") elseif ("${AOM_TARGET_SYSTEM}" STREQUAL "Linux") set(objformat "elf64") elseif ("${AOM_TARGET_SYSTEM}" STREQUAL "MSYS" OR "${AOM_TARGET_SYSTEM}" STREQUAL "Windows") set(objformat "win64") else () message(FATAL_ERROR "Unknown obj format: ${AOM_TARGET_SYSTEM}") endif () elseif ("${AOM_TARGET_CPU}" STREQUAL "x86") if ("${AOM_TARGET_SYSTEM}" STREQUAL "Darwin") set(objformat "macho32") elseif ("${AOM_TARGET_SYSTEM}" STREQUAL "Linux") set(objformat "elf32") elseif ("${AOM_TARGET_SYSTEM}" STREQUAL "MSYS" OR "${AOM_TARGET_SYSTEM}" STREQUAL "Windows") set(objformat "win32") else () message(FATAL_ERROR "Unknown obj format: ${AOM_TARGET_SYSTEM}") endif () else () message(FATAL_ERROR "Unknown obj format: ${AOM_TARGET_CPU}-${AOM_TARGET_SYSTEM}") endif () set(${out_format} ${objformat} PARENT_SCOPE) endfunction () # Adds library target named $lib_name for ASM files in variable named by # $asm_sources. Builds an output directory path from $lib_name. Links $lib_name # into $dependent_target. Generates a dummy C file with a dummy function to # ensure that all cmake generators can determine the linker language, and that # build tools don't complain that an object exposes no symbols. function (add_asm_library lib_name asm_sources dependent_target) set(asm_lib_obj_dir "${AOM_CONFIG_DIR}/asm_objects/${lib_name}") if (NOT EXISTS "${asm_lib_obj_dir}") file(MAKE_DIRECTORY "${asm_lib_obj_dir}") endif () # TODO(tomfinegan): If cmake ever allows addition of .o files to OBJECT lib # targets, make this OBJECT instead of STATIC to hide the target from # consumers of the AOM cmake build. add_library(${lib_name} STATIC ${${asm_sources}}) foreach (asm_source ${${asm_sources}}) get_filename_component(asm_source_name "${asm_source}" NAME) set(asm_object "${asm_lib_obj_dir}/${asm_source_name}.o") add_custom_command(OUTPUT "${asm_object}" COMMAND ${AS_EXECUTABLE} ARGS ${AOM_AS_FLAGS} -I${AOM_ROOT}/ -I${AOM_CONFIG_DIR}/ -o "${asm_object}" "${asm_source}" DEPENDS "${asm_source}" COMMENT "Building ASM object ${asm_object}" WORKING_DIRECTORY "${AOM_CONFIG_DIR}" VERBATIM) target_sources(aom PRIVATE "${asm_object}") endforeach () # The above created a target containing only ASM sources. Cmake needs help # here to determine the linker language. Add a dummy C file to force the # linker language to C. We don't bother with setting the LINKER_LANGUAGE # property on the library target because not all generators obey it (looking # at you, xcode generator). add_dummy_source_file_to_target("${lib_name}" "c") # Add the new lib target to the global list of aom library targets. list(APPEND AOM_LIB_TARGETS ${lib_name}) set(AOM_LIB_TARGETS ${AOM_LIB_TARGETS} PARENT_SCOPE) endfunction () # Converts asm sources in $asm_sources using $AOM_ADS2GAS and calls # add_asm_library() to create a library from the converted sources. At # generation time the converted sources are created, and a custom rule is added # to ensure the sources are reconverted when the original asm source is updated. # See add_asm_library() for more information. function (add_gas_asm_library lib_name asm_sources dependent_target) set(asm_converted_source_dir "${AOM_CONFIG_DIR}/asm_gas/${lib_name}") if (NOT EXISTS "${asm_converted_source_dir}") file(MAKE_DIRECTORY "${asm_converted_source_dir}") endif () # Create the converted version of each assembly source at generation time. unset(gas_target_sources) foreach (neon_asm_source ${${asm_sources}}) get_filename_component(output_asm_source "${neon_asm_source}" NAME) set(output_asm_source "${asm_converted_source_dir}/${output_asm_source}") set(output_asm_source "${output_asm_source}.${AOM_GAS_EXT}") execute_process(COMMAND "${PERL_EXECUTABLE}" "${AOM_ADS2GAS}" INPUT_FILE "${neon_asm_source}" OUTPUT_FILE "${output_asm_source}") list(APPEND gas_target_sources "${output_asm_source}") endforeach () add_asm_library("${lib_name}" "gas_target_sources" "${dependent_target}") # For each of the converted sources, create a custom rule that will regenerate # the converted source when its input is touched. list(LENGTH gas_target_sources num_asm_files) math(EXPR num_asm_files "${num_asm_files} - 1") foreach(NUM RANGE ${num_asm_files}) list(GET ${asm_sources} ${NUM} neon_asm_source) list(GET gas_target_sources ${NUM} gas_asm_source) # Grab only the filename for the custom command output to keep build output # reasonably sane. get_filename_component(neon_name "${neon_asm_source}" NAME) get_filename_component(gas_name "${gas_asm_source}" NAME) add_custom_command( OUTPUT "${gas_asm_source}" COMMAND ${PERL_EXECUTABLE} ARGS "${AOM_ADS2GAS}" < "${neon_asm_source}" > "${gas_asm_source}" DEPENDS "${neon_asm_source}" COMMENT "ads2gas conversion ${neon_name} -> ${gas_name}" WORKING_DIRECTORY "${AOM_CONFIG_DIR}" VERBATIM) endforeach () # Update the sources list passed in to include the converted asm source files. list(APPEND asm_sources ${gas_target_sources}) set(${asm_sources} ${${asm_sources}} PARENT_SCOPE) endfunction () # Terminates generation if nasm found in PATH does not meet requirements. # Currently checks only for presence of required object formats and support for # the -Ox argument (multipass optimization). function (test_nasm) execute_process(COMMAND ${AS_EXECUTABLE} -hf OUTPUT_VARIABLE nasm_helptext) if (NOT "${nasm_helptext}" MATCHES "-Ox") message(FATAL_ERROR "Unsupported nasm: multipass optimization not supported.") endif () if ("${AOM_TARGET_CPU}" STREQUAL "x86") if ("${AOM_TARGET_SYSTEM}" STREQUAL "Darwin") if (NOT "${nasm_helptext}" MATCHES "macho32") message(FATAL_ERROR "Unsupported nasm: macho32 object format not supported.") endif () elseif ("${AOM_TARGET_SYSTEM}" STREQUAL "Linux") if (NOT "${nasm_helptext}" MATCHES "elf32") message(FATAL_ERROR "Unsupported nasm: elf32 object format not supported.") endif () endif () else () if ("${AOM_TARGET_SYSTEM}" STREQUAL "Darwin") if (NOT "${nasm_helptext}" MATCHES "macho64") message(FATAL_ERROR "Unsupported nasm: macho64 object format not supported.") endif () elseif ("${AOM_TARGET_SYSTEM}" STREQUAL "Linux") if (NOT "${nasm_helptext}" MATCHES "elf64") message(FATAL_ERROR "Unsupported nasm: elf64 object format not supported.") endif () endif () endif () endfunction () # Adds build command for generation of rtcd C source files using # build/make/rtcd.pl. $config is the input perl file, $output is the output C # include file, $source is the C source file, and $symbol is used for the symbol # argument passed to rtcd.pl. function (add_rtcd_build_step config output source symbol) add_custom_command( OUTPUT ${output} COMMAND ${PERL_EXECUTABLE} ARGS "${AOM_ROOT}/build/make/rtcd.pl" --arch=${AOM_TARGET_CPU} --sym=${symbol} ${AOM_RTCD_FLAGS} --config=${AOM_CONFIG_DIR}/${AOM_TARGET_CPU}_rtcd_config.rtcd ${config} > ${output} DEPENDS ${config} COMMENT "Generating ${output}" WORKING_DIRECTORY ${AOM_CONFIG_DIR} VERBATIM) set_property(SOURCE ${source} PROPERTY OBJECT_DEPENDS ${output}) set_property(SOURCE ${output} PROPERTY GENERATED) endfunction () endif () # AOM_BUILD_CMAKE_AOM_OPTIMIZATION_CMAKE_