6fd8748f88
qt_internal_add_simd can now take an EXCLUDE_OSX_ARCHITECTURES list of
values which specifies for which architectures the simd compile flags
should not be added.
This is relevant for macOS universal builds.
Example
CMAKE_OSX_ARCHITECTURES is "x86_64;arm64"
EXCLUDE_OSX_ARCHITECTURES is "arm64"
SIMD is avx2
the final compiler flags that will be added are "-Xarch_x86_64 -mavx2"
Slightly, clean up the function implementation and document its
arguments.
NAME handling has been removed because it's dead code that hasn't been
removed as part of 1b7008a3d7.
Task-number: QTBUG-85447
Change-Id: I395c19bdd67219bebb6b5b8d9f418b6e6488e09b
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
102 lines
5.0 KiB
CMake
102 lines
5.0 KiB
CMake
# Handle files that need special SIMD-related flags.
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#
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# This function adds the passed source files to the given target only if the SIMD specific condition
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# evaluates to true. It also adds the SIMD architecture specific flags as compile options to those
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# source files.
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#
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# Arguments
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# NAME: is deprecated, don't use it.
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# SIMD: name of the simd architecture, e.g. sse2, avx, neon. A Qt feature named QT_FEATURE_foo
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# should exist, as well as QT_CFLAGS_foo assignment in QtCompilerOptimization.cmake.
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# COMPILE_FLAGS: extra compile flags to set for the passed source files
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# EXCLUDE_OSX_ARCHITECTURES: On apple platforms, specifies which architectures should not get the
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# SIMD compiler flags. This is mostly relevant for fat / universal builds
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#
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function(qt_internal_add_simd_part target)
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qt_parse_all_arguments(arg "qt_add_simd_part" "" "NAME;SIMD"
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"${__default_private_args};COMPILE_FLAGS;EXCLUDE_OSX_ARCHITECTURES" ${ARGN})
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if ("x${arg_SIMD}" STREQUAL x)
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message(FATAL_ERROR "qt_add_simd_part needs a SIMD type to be set.")
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endif()
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set(condition "QT_FEATURE_${arg_SIMD}")
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string(TOUPPER "QT_CFLAGS_${arg_SIMD}" simd_flags_var_name)
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set(simd_flags_expanded "")
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# As per mkspecs/features/simd.prf, the arch_haswell SIMD compiler is enabled when
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# qmake's CONFIG contains "avx2", which maps to CMake's QT_FEATURE_avx2.
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# The list of dependencies 'avx2 bmi bmi2 f16c fma lzcnt popcnt' only influences whether
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# the 'arch_haswell' SIMD flags need to be added explicitly to the compiler invocation.
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# If the compiler adds them implicitly, they must be present in qmake's QT_CPU_FEATURES as
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# detected by the architecture test, and thus they are present in TEST_subarch_result.
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if("${arg_SIMD}" STREQUAL arch_haswell)
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set(condition "QT_FEATURE_avx2")
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# Use avx2 flags as per simd.prf, if there are no specific arch_haswell flags specified in
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# QtCompilerOptimization.cmake.
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if("${simd_flags_var_name}" STREQUAL "")
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set(simd_flags_var_name "QT_CFLAGS_AVX2")
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endif()
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# The avx512 profiles dependencies DO influence if the SIMD compiler will be executed,
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# so each of the profile dependencies have to be in qmake's CONFIG for the compiler to be
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# enabled, which means the CMake features have to evaluate to true.
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# Also the profile flags to be used are a combination of arch_haswell, avx512f and each of the
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# dependencies.
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elseif("${arg_SIMD}" STREQUAL avx512common)
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set(condition "QT_FEATURE_avx512cd")
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list(APPEND simd_flags_expanded "${QT_CFLAGS_ARCH_HASWELL}")
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list(APPEND simd_flags_expanded "${QT_CFLAGS_AVX512F}")
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list(APPEND simd_flags_expanded "${QT_CFLAGS_AVX512CD}")
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list(REMOVE_DUPLICATES simd_flags_expanded)
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elseif("${arg_SIMD}" STREQUAL avx512core)
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set(condition "QT_FEATURE_avx512cd AND QT_FEATURE_avx512bw AND QT_FEATURE_avx512dq AND QT_FEATURE_avx512vl")
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list(APPEND simd_flags_expanded "${QT_CFLAGS_ARCH_HASWELL}")
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list(APPEND simd_flags_expanded "${QT_CFLAGS_AVX512F}")
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list(APPEND simd_flags_expanded "${QT_CFLAGS_AVX512CD}")
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list(APPEND simd_flags_expanded "${QT_CFLAGS_AVX512BW}")
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list(APPEND simd_flags_expanded "${QT_CFLAGS_AVX512DQ}")
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list(APPEND simd_flags_expanded "${QT_CFLAGS_AVX512VL}")
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list(REMOVE_DUPLICATES simd_flags_expanded)
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endif()
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qt_evaluate_config_expression(result ${condition})
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if(${result})
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if(QT_CMAKE_DEBUG_EXTEND_TARGET)
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message("qt_add_simd_part(${target} SIMD ${arg_SIMD} ...): Evaluated")
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endif()
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if(NOT simd_flags_expanded)
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set(simd_flags_expanded "${${simd_flags_var_name}}")
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endif()
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# If requested, don't pass the simd specific flags to excluded arches on apple platforms.
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# Mostly important for universal / fat builds.
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get_target_property(osx_architectures ${target} OSX_ARCHITECTURES)
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if(simd_flags_expanded AND osx_architectures AND arg_EXCLUDE_OSX_ARCHITECTURES)
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list(REMOVE_ITEM osx_architectures ${arg_EXCLUDE_OSX_ARCHITECTURES})
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# Assumes that simd_flags_expanded contains only one item on apple platforms.
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list(TRANSFORM osx_architectures
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REPLACE "^(.+)$" "-Xarch_\\1;${simd_flags_expanded}"
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OUTPUT_VARIABLE simd_flags_expanded)
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endif()
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# The manual loop is done on purpose. Check Gerrit comments for
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# 1b7008a3d784f3f266368f824cb43d473a301ba1.
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foreach(source IN LISTS arg_SOURCES)
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set_property(SOURCE "${source}" APPEND
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PROPERTY COMPILE_OPTIONS
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${simd_flags_expanded}
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${arg_COMPILE_FLAGS}
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)
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endforeach()
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set_source_files_properties(${arg_SOURCES} PROPERTIES SKIP_PRECOMPILE_HEADERS TRUE)
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target_sources(${target} PRIVATE ${arg_SOURCES})
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else()
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if(QT_CMAKE_DEBUG_EXTEND_TARGET)
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message("qt_add_simd_part(${target} SIMD ${arg_SIMD} ...): Skipped")
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endif()
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endif()
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endfunction()
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