diff options
Diffstat (limited to 'cmake/QtSimdHelpers.cmake')
| -rw-r--r-- | cmake/QtSimdHelpers.cmake | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/cmake/QtSimdHelpers.cmake b/cmake/QtSimdHelpers.cmake new file mode 100644 index 0000000000..26a275dc1f --- /dev/null +++ b/cmake/QtSimdHelpers.cmake @@ -0,0 +1,81 @@ +# Handle files that need special SIMD-related flags. +# This creates an object library and makes target link +# to it (privately). +function(qt_add_simd_part target) + qt_parse_all_arguments(arg "qt_add_simd_part" "" "" + "NAME;SIMD;${__default_private_args};COMPILE_FLAGS" ${ARGN}) + if ("x${arg_SIMD}" STREQUAL x) + message(FATAL_ERROR "qt_add_simd_part needs a SIMD type to be set.") + endif() + + set(condition "QT_FEATURE_${arg_SIMD}") + string(TOUPPER "QT_CFLAGS_${arg_SIMD}" simd_flags_var_name) + set(simd_flags_expanded "") + + # As per mkspecs/features/simd.prf, the arch_haswell SIMD compiler is enabled when + # qmake's CONFIG contains "avx2", which maps to CMake's QT_FEATURE_avx2. + # The list of dependencies 'avx2 bmi bmi2 f16c fma lzcnt popcnt' only influences whether + # the 'arch_haswell' SIMD flags need to be added explicitly to the compiler invocation. + # If the compiler adds them implicitly, they must be present in qmake's QT_CPU_FEATURES as + # detected by the architecture test, and thus they are present in TEST_subarch_result. + if("${arg_SIMD}" STREQUAL arch_haswell) + set(condition "QT_FEATURE_avx2") + + # Use avx2 flags as per simd.prf, if there are no specific arch_haswell flags specified in + # QtCompilerOptimization.cmake. + if("${simd_flags_var_name}" STREQUAL "") + set(simd_flags_var_name "QT_CFLAGS_AVX2") + endif() + + # The avx512 profiles dependencies DO influence if the SIMD compiler will be executed, + # so each of the profile dependencies have to be in qmake's CONFIG for the compiler to be + # enabled, which means the CMake features have to evaluate to true. + # Also the profile flags to be used are a combination of arch_haswell, avx512f and each of the + # dependencies. + elseif("${arg_SIMD}" STREQUAL avx512common) + set(condition "QT_FEATURE_avx512cd") + list(APPEND simd_flags_expanded "${QT_CFLAGS_ARCH_HASWELL}") + list(APPEND simd_flags_expanded "${QT_CFLAGS_AVX512F}") + list(APPEND simd_flags_expanded "${QT_CFLAGS_AVX512CD}") + list(REMOVE_DUPLICATES simd_flags_expanded) + elseif("${arg_SIMD}" STREQUAL avx512core) + set(condition "QT_FEATURE_avx512cd AND QT_FEATURE_avx512bw AND QT_FEATURE_avx512dq AND QT_FEATURE_avx512vl") + list(APPEND simd_flags_expanded "${QT_CFLAGS_ARCH_HASWELL}") + list(APPEND simd_flags_expanded "${QT_CFLAGS_AVX512F}") + list(APPEND simd_flags_expanded "${QT_CFLAGS_AVX512CD}") + list(APPEND simd_flags_expanded "${QT_CFLAGS_AVX512BW}") + list(APPEND simd_flags_expanded "${QT_CFLAGS_AVX512DQ}") + list(APPEND simd_flags_expanded "${QT_CFLAGS_AVX512VL}") + list(REMOVE_DUPLICATES simd_flags_expanded) + endif() + + set(name "${arg_NAME}") + if("x${name}" STREQUAL x) + set(name "${target}_simd_${arg_SIMD}") + endif() + + qt_evaluate_config_expression(result ${condition}) + if(${result}) + if(QT_CMAKE_DEBUG_EXTEND_TARGET) + message("qt_add_simd_part(${target} SIMD ${arg_SIMD} ...): Evaluated") + endif() + + if(NOT simd_flags_expanded) + set(simd_flags_expanded "${${simd_flags_var_name}}") + endif() + + foreach(source IN LISTS arg_SOURCES) + set_property(SOURCE "${source}" APPEND + PROPERTY COMPILE_OPTIONS + ${simd_flags_expanded} + ${arg_COMPILE_FLAGS} + ) + endforeach() + set_source_files_properties(${arg_SOURCES} PROPERTIES SKIP_PRECOMPILE_HEADERS TRUE) + target_sources(${target} PRIVATE ${arg_SOURCES}) + else() + if(QT_CMAKE_DEBUG_EXTEND_TARGET) + message("qt_add_simd_part(${target} SIMD ${arg_SIMD} ...): Skipped") + endif() + endif() +endfunction() |