diff options
Diffstat (limited to 'third_party/aom/build/cmake/aom_optimization.cmake')
| -rw-r--r-- | third_party/aom/build/cmake/aom_optimization.cmake | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/third_party/aom/build/cmake/aom_optimization.cmake b/third_party/aom/build/cmake/aom_optimization.cmake new file mode 100644 index 000000000..e2b0ba07e --- /dev/null +++ b/third_party/aom/build/cmake/aom_optimization.cmake @@ -0,0 +1,204 @@ +## +## 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) + +# 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) + 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(aom PUBLIC $<TARGET_OBJECTS:${target_name}>) + + # 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} PUBLIC ${${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 "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 "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(${lib_name} PRIVATE "${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). + set(dummy_c_file "${AOM_CONFIG_DIR}/${lib_name}_dummy.c") + file(WRITE "${dummy_c_file}" + "// Generated file. DO NOT EDIT!\n" + "// ${lib_name} needs C file to force link language, ignore me.\n" + "void ${lib_name}_dummy_function(void) {}\n") + target_sources(${lib_name} PUBLIC ${dummy_c_file}) + + target_link_libraries(${dependent_target} PRIVATE ${lib_name}) + + # 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 () + +endif () # AOM_BUILD_CMAKE_AOM_OPTIMIZATION_CMAKE_ |