1# 2# Copyright (c) 2017, Alliance for Open Media. All rights reserved 3# 4# This source code is subject to the terms of the BSD 2 Clause License and the 5# Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License was 6# not distributed with this source code in the LICENSE file, you can obtain it 7# at www.aomedia.org/license/software. If the Alliance for Open Media Patent 8# License 1.0 was not distributed with this source code in the PATENTS file, you 9# can obtain it at www.aomedia.org/license/patent. 10# 11if(AOM_BUILD_CMAKE_AOM_OPTIMIZATION_CMAKE_) 12 return() 13endif() # AOM_BUILD_CMAKE_AOM_OPTIMIZATION_CMAKE_ 14set(AOM_BUILD_CMAKE_AOM_OPTIMIZATION_CMAKE_ 1) 15 16include("${AOM_ROOT}/build/cmake/util.cmake") 17 18# Translate $flag to one which MSVC understands, and write the new flag to the 19# variable named by $translated_flag (or unset it, when MSVC needs no flag). 20function(get_msvc_intrinsic_flag flag translated_flag) 21 if("${flag}" STREQUAL "-mavx") 22 set(${translated_flag} "/arch:AVX" PARENT_SCOPE) 23 elseif("${flag}" STREQUAL "-mavx2") 24 set(${translated_flag} "/arch:AVX2" PARENT_SCOPE) 25 else() 26 27 # MSVC does not need flags for intrinsics flavors other than AVX/AVX2. 28 unset(${translated_flag} PARENT_SCOPE) 29 endif() 30endfunction() 31 32# Adds an object library target. Terminates generation if $flag is not supported 33# by the current compiler. $flag is the intrinsics flag required by the current 34# compiler, and is added to the compile flags for all sources in $sources. 35# $opt_name is used to name the target. $target_to_update is made dependent upon 36# the created target. 37# 38# Note: this function always updates the aom, and aom_static targets because 39# OBJECT libraries have rules that disallow the direct addition of .o files to 40# them as dependencies. Static and shared libraries do not have this limitation. 41function(add_intrinsics_object_library flag opt_name target_to_update sources) 42 if("${${sources}}" STREQUAL "") 43 return() 44 endif() 45 set(target_name ${target_to_update}_${opt_name}_intrinsics) 46 add_library(${target_name} OBJECT ${${sources}}) 47 48 if(MSVC) 49 get_msvc_intrinsic_flag(${flag} "flag") 50 endif() 51 52 if("${flag}" STREQUAL "-mavx2") 53 unset(FLAG_SUPPORTED) 54 check_c_compiler_flag("-mno-avx256-split-unaligned-load" FLAG_SUPPORTED) 55 if(${FLAG_SUPPORTED}) 56 set(flag "${flag} -mno-avx256-split-unaligned-load") 57 endif() 58 59 unset(FLAG_SUPPORTED) 60 check_c_compiler_flag("-mno-avx256-split-unaligned-store" FLAG_SUPPORTED) 61 if(${FLAG_SUPPORTED}) 62 set(flag "${flag} -mno-avx256-split-unaligned-store") 63 endif() 64 endif() 65 66 if(flag) 67 separate_arguments(flag) 68 target_compile_options(${target_name} PUBLIC ${flag}) 69 endif() 70 71 target_sources(aom PRIVATE $<TARGET_OBJECTS:${target_name}>) 72 if(BUILD_SHARED_LIBS) 73 target_sources(aom_static PRIVATE $<TARGET_OBJECTS:${target_name}>) 74 endif() 75 76 # Add the new lib target to the global list of aom library targets. 77 list(APPEND AOM_LIB_TARGETS ${target_name}) 78 set(AOM_LIB_TARGETS ${AOM_LIB_TARGETS} PARENT_SCOPE) 79endfunction() 80 81# Adds sources in list named by $sources to $target and adds $flag to the 82# compile flags for each source file. 83function(add_intrinsics_source_to_target flag target sources) 84 target_sources(${target} PRIVATE ${${sources}}) 85 if(MSVC) 86 get_msvc_intrinsic_flag(${flag} "flag") 87 endif() 88 if(flag) 89 foreach(source ${${sources}}) 90 set_property(SOURCE ${source} APPEND PROPERTY COMPILE_FLAGS ${flag}) 91 endforeach() 92 endif() 93endfunction() 94 95# Writes object format for the current target to the var named by $out_format, 96# or terminates the build when the object format for the current target is 97# unknown. 98function(get_asm_obj_format out_format) 99 if("${AOM_TARGET_CPU}" STREQUAL "x86_64") 100 if("${AOM_TARGET_SYSTEM}" STREQUAL "Darwin") 101 set(objformat "macho64") 102 elseif("${AOM_TARGET_SYSTEM}" STREQUAL "MSYS" 103 OR "${AOM_TARGET_SYSTEM}" STREQUAL "Windows") 104 set(objformat "win64") 105 else() 106 set(objformat "elf64") 107 endif() 108 elseif("${AOM_TARGET_CPU}" STREQUAL "x86") 109 if("${AOM_TARGET_SYSTEM}" STREQUAL "Darwin") 110 set(objformat "macho32") 111 elseif("${AOM_TARGET_SYSTEM}" STREQUAL "MSYS" 112 OR "${AOM_TARGET_SYSTEM}" STREQUAL "Windows") 113 set(objformat "win32") 114 else() 115 set(objformat "elf32") 116 endif() 117 else() 118 message( 119 FATAL_ERROR "Unknown obj format: ${AOM_TARGET_CPU}-${AOM_TARGET_SYSTEM}") 120 endif() 121 122 set(${out_format} ${objformat} PARENT_SCOPE) 123endfunction() 124 125# Adds library target named $lib_name for ASM files in variable named by 126# $asm_sources. Builds an output directory path from $lib_name. Links $lib_name 127# into the aom library target(s). Generates a dummy C file with a dummy function 128# to ensure that all cmake generators can determine the linker language, and 129# that build tools don't complain that an object exposes no symbols. 130function(add_asm_library lib_name asm_sources) 131 if("${${asm_sources}}" STREQUAL "") 132 return() 133 endif() 134 set(asm_lib_obj_dir "${AOM_CONFIG_DIR}/asm_objects/${lib_name}") 135 if(NOT EXISTS "${asm_lib_obj_dir}") 136 file(MAKE_DIRECTORY "${asm_lib_obj_dir}") 137 endif() 138 139 # TODO(tomfinegan): If cmake ever allows addition of .o files to OBJECT lib 140 # targets, make this OBJECT instead of STATIC to hide the target from 141 # consumers of the AOM cmake build. 142 add_library(${lib_name} STATIC ${${asm_sources}}) 143 144 foreach(asm_source ${${asm_sources}}) 145 get_filename_component(asm_source_name "${asm_source}" NAME) 146 set(asm_object "${asm_lib_obj_dir}/${asm_source_name}.o") 147 add_custom_command(OUTPUT "${asm_object}" 148 COMMAND ${AS_EXECUTABLE} ARGS ${AOM_AS_FLAGS} 149 -I${AOM_ROOT}/ -I${AOM_CONFIG_DIR}/ -o 150 "${asm_object}" "${asm_source}" 151 DEPENDS "${asm_source}" 152 COMMENT "Building ASM object ${asm_object}" 153 WORKING_DIRECTORY "${AOM_CONFIG_DIR}" 154 VERBATIM) 155 target_sources(aom PRIVATE "${asm_object}") 156 if(BUILD_SHARED_LIBS) 157 target_sources(aom_static PRIVATE "${asm_object}") 158 endif() 159 endforeach() 160 161 # The above created a target containing only ASM sources. Cmake needs help 162 # here to determine the linker language. Add a dummy C file to force the 163 # linker language to C. We don't bother with setting the LINKER_LANGUAGE 164 # property on the library target because not all generators obey it (looking 165 # at you, xcode generator). 166 add_dummy_source_file_to_target("${lib_name}" "c") 167 168 # Add the new lib target to the global list of aom library targets. 169 list(APPEND AOM_LIB_TARGETS ${lib_name}) 170 set(AOM_LIB_TARGETS ${AOM_LIB_TARGETS} PARENT_SCOPE) 171endfunction() 172 173# Terminates generation if nasm found in PATH does not meet requirements. 174# Currently checks only for presence of required object formats and support for 175# the -Ox argument (multipass optimization). 176function(test_nasm) 177 execute_process(COMMAND ${AS_EXECUTABLE} -hf OUTPUT_VARIABLE nasm_helptext) 178 179 if(NOT "${nasm_helptext}" MATCHES "-Ox") 180 message( 181 FATAL_ERROR "Unsupported nasm: multipass optimization not supported.") 182 endif() 183 184 if("${AOM_TARGET_CPU}" STREQUAL "x86") 185 if("${AOM_TARGET_SYSTEM}" STREQUAL "Darwin") 186 if(NOT "${nasm_helptext}" MATCHES "macho32") 187 message( 188 FATAL_ERROR "Unsupported nasm: macho32 object format not supported.") 189 endif() 190 elseif("${AOM_TARGET_SYSTEM}" STREQUAL "MSYS" 191 OR "${AOM_TARGET_SYSTEM}" STREQUAL "Windows") 192 if(NOT "${nasm_helptext}" MATCHES "win32") 193 message( 194 FATAL_ERROR "Unsupported nasm: win32 object format not supported.") 195 endif() 196 else() 197 if(NOT "${nasm_helptext}" MATCHES "elf32") 198 message( 199 FATAL_ERROR "Unsupported nasm: elf32 object format not supported.") 200 endif() 201 endif() 202 else() 203 if("${AOM_TARGET_SYSTEM}" STREQUAL "Darwin") 204 if(NOT "${nasm_helptext}" MATCHES "macho64") 205 message( 206 FATAL_ERROR "Unsupported nasm: macho64 object format not supported.") 207 endif() 208 elseif("${AOM_TARGET_SYSTEM}" STREQUAL "MSYS" 209 OR "${AOM_TARGET_SYSTEM}" STREQUAL "Windows") 210 if(NOT "${nasm_helptext}" MATCHES "win64") 211 message( 212 FATAL_ERROR "Unsupported nasm: win64 object format not supported.") 213 endif() 214 else() 215 if(NOT "${nasm_helptext}" MATCHES "elf64") 216 message( 217 FATAL_ERROR "Unsupported nasm: elf64 object format not supported.") 218 endif() 219 endif() 220 endif() 221endfunction() 222 223# Adds build command for generation of rtcd C source files using 224# build/cmake/rtcd.pl. $config is the input perl file, $output is the output C 225# include file, $source is the C source file, and $symbol is used for the symbol 226# argument passed to rtcd.pl. 227function(add_rtcd_build_step config output source symbol) 228 add_custom_command( 229 OUTPUT ${output} 230 COMMAND ${PERL_EXECUTABLE} ARGS "${AOM_ROOT}/build/cmake/rtcd.pl" 231 --arch=${AOM_TARGET_CPU} 232 --sym=${symbol} ${AOM_RTCD_FLAGS} 233 --config=${AOM_CONFIG_DIR}/config/aom_config.h ${config} > ${output} 234 DEPENDS ${config} 235 COMMENT "Generating ${output}" 236 WORKING_DIRECTORY ${AOM_CONFIG_DIR} 237 VERBATIM) 238 set_property(SOURCE ${source} PROPERTY OBJECT_DEPENDS ${output}) 239 set_property(SOURCE ${output} PROPERTY GENERATED) 240endfunction() 241