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# Macros for use with the Vc library. Vc can be found at http://code.compeng.uni-frankfurt.de/projects/vc
#
# The following macros are provided:
# vc_determine_compiler
# vc_set_preferred_compiler_flags
#
#=============================================================================
# Copyright 2009-2015 Matthias Kretz <kretz@kde.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# * Neither the names of contributing organizations nor the
# names of its contributors may be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS ``AS IS''
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#=============================================================================
cmake_minimum_required(VERSION 2.8.3...3.13)
get_filename_component(_currentDir "${CMAKE_CURRENT_LIST_FILE}" PATH)
include ("${_currentDir}/UserWarning.cmake")
include ("${_currentDir}/AddCompilerFlag.cmake")
include ("${_currentDir}/OptimizeForArchitecture.cmake")
macro(vc_determine_compiler)
if(NOT DEFINED Vc_COMPILER_IS_INTEL)
execute_process(COMMAND "${CMAKE_CXX_COMPILER}" "--version" OUTPUT_VARIABLE _cxx_compiler_version ERROR_VARIABLE _cxx_compiler_version)
set(Vc_COMPILER_IS_INTEL false)
set(Vc_COMPILER_IS_OPEN64 false)
set(Vc_COMPILER_IS_CLANG false)
set(Vc_COMPILER_IS_MSVC false)
set(Vc_COMPILER_IS_GCC false)
if(CMAKE_CXX_COMPILER MATCHES "/(icpc|icc)$")
set(Vc_COMPILER_IS_INTEL true)
exec_program(${CMAKE_CXX_COMPILER} ARGS -dumpversion OUTPUT_VARIABLE Vc_ICC_VERSION)
message(STATUS "Detected Compiler: Intel ${Vc_ICC_VERSION}")
# break build with too old clang as early as possible.
if(Vc_ICC_VERSION VERSION_LESS 18.0.0)
message(FATAL_ERROR "Vc 1.4 requires least ICC 18")
endif()
elseif(CMAKE_CXX_COMPILER MATCHES "(opencc|openCC)$")
set(Vc_COMPILER_IS_OPEN64 true)
message(STATUS "Detected Compiler: Open64")
elseif(CMAKE_CXX_COMPILER MATCHES "clang\\+\\+$" OR "${_cxx_compiler_version}" MATCHES "clang")
set(Vc_COMPILER_IS_CLANG true)
exec_program(${CMAKE_CXX_COMPILER} ARGS --version OUTPUT_VARIABLE Vc_CLANG_VERSION)
string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" Vc_CLANG_VERSION "${Vc_CLANG_VERSION}")
message(STATUS "Detected Compiler: Clang ${Vc_CLANG_VERSION}")
# break build with too old clang as early as possible.
if(Vc_CLANG_VERSION VERSION_LESS 3.4)
message(FATAL_ERROR "Vc 1.x requires C++11 support. This requires at least clang 3.4")
endif()
elseif(MSVC)
set(Vc_COMPILER_IS_MSVC true)
message(STATUS "Detected Compiler: MSVC ${MSVC_VERSION}")
elseif(CMAKE_COMPILER_IS_GNUCXX)
set(Vc_COMPILER_IS_GCC true)
exec_program(${CMAKE_CXX_COMPILER} ARGS -dumpversion OUTPUT_VARIABLE Vc_GCC_VERSION)
message(STATUS "Detected Compiler: GCC ${Vc_GCC_VERSION}")
# some distributions patch their GCC to return nothing or only major and minor version on -dumpversion.
# In that case we must extract the version number from --version.
if(NOT Vc_GCC_VERSION OR Vc_GCC_VERSION MATCHES "^[0-9]\\.[0-9]+$")
exec_program(${CMAKE_CXX_COMPILER} ARGS --version OUTPUT_VARIABLE Vc_GCC_VERSION)
string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" Vc_GCC_VERSION "${Vc_GCC_VERSION}")
message(STATUS "GCC Version from --version: ${Vc_GCC_VERSION}")
endif()
# some distributions patch their GCC to be API incompatible to what the FSF released. In
# those cases we require a macro to identify the distribution version
find_program(Vc_lsb_release lsb_release)
mark_as_advanced(Vc_lsb_release)
if(Vc_lsb_release)
if(NOT Vc_distributor_id)
execute_process(COMMAND ${Vc_lsb_release} -is OUTPUT_VARIABLE Vc_distributor_id OUTPUT_STRIP_TRAILING_WHITESPACE)
string(TOUPPER "${Vc_distributor_id}" Vc_distributor_id)
set(Vc_distributor_id "${Vc_distributor_id}" CACHE STRING "lsb distribution id")
execute_process(COMMAND ${Vc_lsb_release} -rs OUTPUT_VARIABLE Vc_distributor_release OUTPUT_STRIP_TRAILING_WHITESPACE)
set(Vc_distributor_release "${Vc_distributor_release}" CACHE STRING "lsb release id")
endif()
if(Vc_distributor_id STREQUAL "UBUNTU")
execute_process(COMMAND ${CMAKE_CXX_COMPILER} --version OUTPUT_STRIP_TRAILING_WHITESPACE OUTPUT_VARIABLE _gcc_version)
string(REGEX MATCH "\\(.* ${Vc_GCC_VERSION}-([0-9]+).*\\)" _tmp "${_gcc_version}")
if(_tmp)
set(_patch ${CMAKE_MATCH_1})
string(REGEX MATCH "^([0-9]+)\\.([0-9]+)$" _tmp "${Vc_distributor_release}")
execute_process(COMMAND printf 0x%x%02x%02x ${CMAKE_MATCH_1} ${CMAKE_MATCH_2} ${_patch} OUTPUT_STRIP_TRAILING_WHITESPACE OUTPUT_VARIABLE _tmp)
set(Vc_DEFINITIONS "${Vc_DEFINITIONS} -D__GNUC_UBUNTU_VERSION__=${_tmp}")
endif()
endif()
endif()
# break build with too old GCC as early as possible.
if(Vc_GCC_VERSION VERSION_LESS 4.8.1)
message(FATAL_ERROR "Vc 1.x requires C++11 support. This requires at least GCC 4.8.1")
endif()
else()
message(WARNING "Untested/-supported Compiler (${CMAKE_CXX_COMPILER}) for use with Vc.\nPlease fill out the missing parts in the CMake scripts and submit a patch to http://code.compeng.uni-frankfurt.de/projects/vc")
endif()
endif()
endmacro()
macro(vc_set_gnu_buildtype_flags)
set(CMAKE_CXX_FLAGS_DEBUG "-g3" CACHE STRING "Flags used by the compiler during debug builds." FORCE)
set(CMAKE_CXX_FLAGS_MINSIZEREL "-Os -DNDEBUG" CACHE STRING "Flags used by the compiler during release minsize builds." FORCE)
set(CMAKE_CXX_FLAGS_RELEASE "-O3 -DNDEBUG" CACHE STRING "Flags used by the compiler during release builds (/MD /Ob1 /Oi /Ot /Oy /Gs will produce slightly less optimized but smaller files)." FORCE)
set(CMAKE_CXX_FLAGS_RELWITHDEBUG "-O3" CACHE STRING "Flags used by the compiler during release builds containing runtime checks." FORCE)
set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBUG} -g" CACHE STRING "Flags used by the compiler during Release with Debug Info builds." FORCE)
set(CMAKE_C_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}" CACHE STRING "Flags used by the compiler during debug builds." FORCE)
set(CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL}" CACHE STRING "Flags used by the compiler during release minsize builds." FORCE)
set(CMAKE_C_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}" CACHE STRING "Flags used by the compiler during release builds (/MD /Ob1 /Oi /Ot /Oy /Gs will produce slightly less optimized but smaller files)." FORCE)
set(CMAKE_C_FLAGS_RELWITHDEBUG "${CMAKE_CXX_FLAGS_RELWITHDEBUG}" CACHE STRING "Flags used by the compiler during release builds containing runtime checks." FORCE)
set(CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}" CACHE STRING "Flags used by the compiler during Release with Debug Info builds." FORCE)
if(CMAKE_BUILD_TYPE STREQUAL "Release" OR CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo" OR CMAKE_BUILD_TYPE STREQUAL "RelWithDebug")
set(ENABLE_STRICT_ALIASING true CACHE BOOL "Enables strict aliasing rules for more aggressive optimizations")
if(NOT ENABLE_STRICT_ALIASING)
AddCompilerFlag(-fno-strict-aliasing)
endif(NOT ENABLE_STRICT_ALIASING)
endif()
mark_as_advanced(CMAKE_CXX_FLAGS_RELWITHDEBUG CMAKE_C_FLAGS_RELWITHDEBUG)
endmacro()
macro(vc_add_compiler_flag VAR _flag)
AddCompilerFlag("${_flag}" CXX_FLAGS ${VAR})
endmacro()
macro(vc_check_assembler)
exec_program(${CMAKE_CXX_COMPILER} ARGS -print-prog-name=as OUTPUT_VARIABLE _as)
mark_as_advanced(_as)
if(NOT _as)
message(WARNING "Could not find 'as', the assembler used by GCC. Hoping everything will work out...")
else()
exec_program(${_as} ARGS --version OUTPUT_VARIABLE _as_version)
string(REGEX REPLACE "\\([^\\)]*\\)" "" _as_version "${_as_version}")
string(REGEX MATCH "[1-9]\\.[0-9]+(\\.[0-9]+)?" _as_version "${_as_version}")
if(_as_version VERSION_LESS "2.18.93")
UserWarning("Your binutils is too old (${_as_version}). Some optimizations of Vc will be disabled.")
set(Vc_DEFINITIONS "${Vc_DEFINITIONS} -DVc_NO_XGETBV") # old assembler doesn't know the xgetbv instruction
set(Vc_AVX_INTRINSICS_BROKEN true)
set(Vc_XOP_INTRINSICS_BROKEN true)
set(Vc_FMA4_INTRINSICS_BROKEN true)
elseif(_as_version VERSION_LESS "2.21.0")
UserWarning("Your binutils is too old (${_as_version}) for XOP and AVX2 instructions. They will therefore not be provided in libVc.")
set(Vc_XOP_INTRINSICS_BROKEN true)
set(Vc_AVX2_INTRINSICS_BROKEN true)
endif()
endif()
endmacro()
macro(vc_set_preferred_compiler_flags)
vc_determine_compiler()
# Look for libmvec, which provides vectorized implementations of libm
find_library(Vc_LIB_MVEC mvec)
if(Vc_LIB_MVEC)
set(SAFE_CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES}")
set(CMAKE_REQUIRED_LIBRARIES ${Vc_LIB_MVEC})
CHECK_CXX_SOURCE_COMPILES("
#include <x86intrin.h>
extern \"C\" {
__m128 _ZGVbN4v_sinf(__m128);
__m128d _ZGVbN2v_sin(__m128d);
__m128 _ZGVbN4v_cosf(__m128);
__m128d _ZGVbN2v_cos(__m128d);
}
__m128 f0(__m128 x) { return _ZGVbN4v_cosf(_ZGVbN4v_sinf(x)); }
__m128d f1(__m128d x) { return _ZGVbN2v_cos(_ZGVbN2v_sin(x)); }
int main() { return 0; }
" Vc_HAVE_SSE_SINCOS)
CHECK_CXX_SOURCE_COMPILES("
#include <x86intrin.h>
extern \"C\" {
__m256 _ZGVdN8v_sinf(__m256);
__m256d _ZGVdN4v_sin(__m256d);
__m256 _ZGVdN8v_cosf(__m256);
__m256d _ZGVdN4v_cos(__m256d);
}
__m256 f0(__m256 x) { return _ZGVdN8v_cosf(_ZGVdN8v_sinf(x)); }
__m256d f1(__m256d x) { return _ZGVdN4v_cos(_ZGVdN4v_sin(x)); }
int main() { return 0; }
" Vc_HAVE_AVX_SINCOS)
set(CMAKE_REQUIRED_LIBRARIES "${SAFE_CMAKE_REQUIRED_LIBRARIES}")
if(Vc_HAVE_SSE_SINCOS AND Vc_HAVE_AVX_SINCOS)
option(USE_LIBMVEC "Use GNU's libmvec for vectorized sine and cosine" OFF)
if(USE_LIBMVEC)
set(Vc_DEFINITIONS "${Vc_DEFINITIONS} -DVc_HAVE_LIBMVEC=1")
endif()
endif()
endif(Vc_LIB_MVEC)
set(_add_warning_flags false)
set(_add_buildtype_flags false)
foreach(_arg ${ARGN})
if(_arg STREQUAL "WARNING_FLAGS")
set(_add_warning_flags true)
elseif(_arg STREQUAL "BUILDTYPE_FLAGS")
set(_add_buildtype_flags true)
endif()
endforeach()
set(Vc_SSE_INTRINSICS_BROKEN false)
set(Vc_AVX_INTRINSICS_BROKEN false)
set(Vc_AVX2_INTRINSICS_BROKEN false)
set(Vc_XOP_INTRINSICS_BROKEN false)
set(Vc_FMA4_INTRINSICS_BROKEN false)
if(Vc_COMPILER_IS_OPEN64)
##################################################################################################
# Open64 #
##################################################################################################
if(_add_warning_flags)
AddCompilerFlag("-W")
AddCompilerFlag("-Wall")
AddCompilerFlag("-Wimplicit")
AddCompilerFlag("-Wswitch")
AddCompilerFlag("-Wformat")
AddCompilerFlag("-Wchar-subscripts")
AddCompilerFlag("-Wparentheses")
AddCompilerFlag("-Wmultichar")
AddCompilerFlag("-Wtrigraphs")
AddCompilerFlag("-Wpointer-arith")
AddCompilerFlag("-Wcast-align")
AddCompilerFlag("-Wreturn-type")
AddCompilerFlag("-pedantic")
AddCompilerFlag("-Wno-long-long")
AddCompilerFlag("-Wshadow")
AddCompilerFlag("-Wold-style-cast")
AddCompilerFlag("-Wno-variadic-macros")
endif()
if(_add_buildtype_flags)
vc_set_gnu_buildtype_flags()
endif()
vc_check_assembler()
# Open64 4.5.1 still doesn't ship immintrin.h
set(Vc_AVX_INTRINSICS_BROKEN true)
set(Vc_AVX2_INTRINSICS_BROKEN true)
elseif(Vc_COMPILER_IS_GCC)
##################################################################################################
# GCC #
##################################################################################################
if(_add_warning_flags)
foreach(_f -W -Wall -Wswitch -Wformat -Wchar-subscripts -Wparentheses -Wmultichar -Wtrigraphs -Wpointer-arith -Wcast-align -Wreturn-type -pedantic -Wshadow -Wundef)
AddCompilerFlag("${_f}")
endforeach()
foreach(_f -Wold-style-cast)
AddCompilerFlag("${_f}" CXX_FLAGS CMAKE_CXX_FLAGS)
endforeach()
endif()
vc_add_compiler_flag(Vc_COMPILE_FLAGS "-Wabi")
vc_add_compiler_flag(Vc_COMPILE_FLAGS "-fabi-version=0") # ABI version 4 is required to make __m128 and __m256 appear as different types. 0 should give us the latest version.
vc_add_compiler_flag(Vc_COMPILE_FLAGS "-fabi-compat-version=0") # GCC 5 introduced this switch
# and defaults it to 2 if -fabi-version is 0. But in that case the bug -fabi-version=0 is
# supposed to fix resurfaces. For now just make sure that it compiles and links.
# Bug report pending.
if(_add_buildtype_flags)
vc_set_gnu_buildtype_flags()
endif()
if(APPLE)
# The GNU assembler (as) on Mac OS X is hopelessly outdated. The -q flag
# to as tells it to use the clang assembler, though, which is fine.
# -Wa,-q tells GCC to pass -q to as.
vc_add_compiler_flag(Vc_COMPILE_FLAGS "-Wa,-q")
# Apparently the MacOS clang assember doesn't understand XOP instructions.
set(Vc_XOP_INTRINSICS_BROKEN true)
else()
vc_check_assembler()
endif()
elseif(Vc_COMPILER_IS_INTEL)
##################################################################################################
# Intel Compiler #
##################################################################################################
if(_add_buildtype_flags)
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3")
set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -DNDEBUG -O3")
set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -O3")
set(CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO} -DNDEBUG -O3")
endif()
if(CMAKE_BUILD_TYPE STREQUAL "Release" OR CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo")
set(ENABLE_STRICT_ALIASING true CACHE BOOL "Enables strict aliasing rules for more aggressive optimizations")
if(ENABLE_STRICT_ALIASING)
AddCompilerFlag(-ansi-alias CXX_FLAGS Vc_COMPILE_FLAGS)
else()
AddCompilerFlag(-no-ansi-alias CXX_FLAGS Vc_COMPILE_FLAGS)
endif()
endif()
if(NOT "$ENV{DASHBOARD_TEST_FROM_CTEST}" STREQUAL "")
# disable warning #2928: the __GXX_EXPERIMENTAL_CXX0X__ macro is disabled when using GNU version 4.6 with the c++0x option
# this warning just adds noise about problems in the compiler - but I'm only interested in seeing problems in Vc
vc_add_compiler_flag(Vc_COMPILE_FLAGS "-diag-disable 2928")
endif()
# Intel doesn't implement the XOP or FMA4 intrinsics
set(Vc_XOP_INTRINSICS_BROKEN true)
set(Vc_FMA4_INTRINSICS_BROKEN true)
elseif(Vc_COMPILER_IS_MSVC)
##################################################################################################
# Microsoft Visual Studio #
##################################################################################################
if(_add_warning_flags)
AddCompilerFlag("/wd4800") # Disable warning "forcing value to bool"
AddCompilerFlag("/wd4996") # Disable warning about strdup vs. _strdup
AddCompilerFlag("/wd4244") # Disable warning "conversion from 'unsigned int' to 'float', possible loss of data"
AddCompilerFlag("/wd4146") # Disable warning "unary minus operator applied to unsigned type, result still unsigned"
AddCompilerFlag("/wd4227") # Disable warning "anachronism used : qualifiers on reference are ignored" (this is about 'restrict' usage on references, stupid MSVC)
AddCompilerFlag("/wd4722") # Disable warning "destructor never returns, potential memory leak" (warns about ~_UnitTest_Global_Object which we don't care about)
AddCompilerFlag("/wd4748") # Disable warning "/GS can not protect parameters and local variables from local buffer overrun because optimizations are disabled in function" (I don't get it)
add_definitions(-D_CRT_SECURE_NO_WARNINGS)
endif()
vc_add_compiler_flag(Vc_COMPILE_FLAGS "/Gv") # default to __vectorcall
vc_add_compiler_flag(Vc_COMPILE_FLAGS "/bigobj") # required for building tests with AVX
if(MSVC_VERSION LESS 1900)
UserWarning("MSVC before 2015 does not support enough of C++11")
endif()
elseif(Vc_COMPILER_IS_CLANG)
##################################################################################################
# Clang #
##################################################################################################
if(Vc_CLANG_VERSION VERSION_GREATER "3.5.99" AND Vc_CLANG_VERSION VERSION_LESS 3.7.0)
UserWarning("Clang 3.6 has serious issues with AVX code generation, frequently losing 50% of the data. AVX is therefore disabled.\nPlease update to a more recent clang version.\n")
set(Vc_AVX_INTRINSICS_BROKEN true)
set(Vc_AVX2_INTRINSICS_BROKEN true)
endif()
# disable these warnings because clang shows them for function overloads that were discarded via SFINAE
vc_add_compiler_flag(Vc_COMPILE_FLAGS "-Wno-local-type-template-args")
vc_add_compiler_flag(Vc_COMPILE_FLAGS "-Wno-unnamed-type-template-args")
endif()
if(NOT Vc_COMPILER_IS_MSVC)
vc_add_compiler_flag(Vc_COMPILE_FLAGS "-ffp-contract=fast")
endif()
OptimizeForArchitecture()
set(Vc_IMPL "auto" CACHE STRING "Force the Vc implementation globally to the selected instruction set. \"auto\" lets Vc use the best available instructions.")
if(NOT Vc_IMPL STREQUAL "auto")
set(Vc_DEFINITIONS "${Vc_DEFINITIONS} -DVc_IMPL=${Vc_IMPL}")
if(NOT Vc_IMPL STREQUAL "Scalar")
set(_use_var "USE_${Vc_IMPL}")
if(Vc_IMPL STREQUAL "SSE")
set(_use_var "USE_SSE2")
endif()
if(NOT ${_use_var})
message(WARNING "The selected value for Vc_IMPL (${Vc_IMPL}) will not work because the relevant instructions are not enabled via compiler flags.")
endif()
endif()
endif()
endmacro()
# helper macro for vc_compile_for_all_implementations
macro(_vc_compile_one_implementation _srcs _impl)
list(FIND _disabled_targets "${_impl}" _disabled_index)
list(FIND _only_targets "${_impl}" _only_index)
if(${_disabled_index} GREATER -1)
if(${_only_index} GREATER -1)
# disabled and enabled -> error
message(FATAL_ERROR "vc_compile_for_all_implementations lists ${_impl} in both the ONLY and EXCLUDE lists. Please remove one.")
endif()
list(REMOVE_AT _disabled_targets ${_disabled_index})
# skip the rest and return
elseif(NOT _only_targets OR ${_only_index} GREATER -1)
if(${_only_index} GREATER -1)
list(REMOVE_AT _only_targets ${_only_index})
endif()
set(_extra_flags)
set(_ok FALSE)
foreach(_flags_it ${ARGN})
if(_flags_it STREQUAL "NO_FLAG")
set(_ok TRUE)
break()
endif()
string(REPLACE " " ";" _flag_list "${_flags_it}")
foreach(_f ${_flag_list})
AddCompilerFlag(${_f} CXX_RESULT _ok)
if(NOT _ok)
break()
endif()
endforeach()
if(_ok)
set(_extra_flags ${_flags_it})
break()
endif()
endforeach()
if(_ok)
get_filename_component(_out "${_vc_compile_src}" NAME_WE)
get_filename_component(_ext "${_vc_compile_src}" EXT)
set(_out "${CMAKE_CURRENT_BINARY_DIR}/${_out}_${_impl}${_ext}")
add_custom_command(OUTPUT "${_out}"
COMMAND ${CMAKE_COMMAND} -E copy "${_vc_compile_src}" "${_out}"
DEPENDS "${_vc_compile_src}"
COMMENT "Copy to ${_out}"
WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
VERBATIM)
set_source_files_properties( "${_out}" PROPERTIES
COMPILE_DEFINITIONS "Vc_IMPL=${_impl}"
COMPILE_FLAGS "${_flags} ${_extra_flags}"
)
list(APPEND ${_srcs} "${_out}")
endif()
endif()
endmacro()
# Generate compile rules for the given C++ source file for all available implementations and return
# the resulting list of object files in _obj
# all remaining arguments are additional flags
# Example:
# vc_compile_for_all_implementations(_objs src/trigonometric.cpp FLAGS -DCOMPILE_BLAH EXCLUDE Scalar)
# add_executable(executable main.cpp ${_objs})
macro(vc_compile_for_all_implementations _srcs _src)
set(_flags)
unset(_disabled_targets)
unset(_only_targets)
set(_state 0)
foreach(_arg ${ARGN})
if(_arg STREQUAL "FLAGS")
set(_state 1)
elseif(_arg STREQUAL "EXCLUDE")
set(_state 2)
elseif(_arg STREQUAL "ONLY")
set(_state 3)
elseif(_state EQUAL 1)
set(_flags "${_flags} ${_arg}")
elseif(_state EQUAL 2)
list(APPEND _disabled_targets "${_arg}")
elseif(_state EQUAL 3)
list(APPEND _only_targets "${_arg}")
else()
message(FATAL_ERROR "incorrect argument to vc_compile_for_all_implementations")
endif()
endforeach()
set(_vc_compile_src "${_src}")
_vc_compile_one_implementation(${_srcs} Scalar NO_FLAG)
if(NOT Vc_SSE_INTRINSICS_BROKEN)
if (Vc_COMPILER_IS_MSVC)
_vc_compile_one_implementation(${_srcs} SSE2 NO_FLAG)
_vc_compile_one_implementation(${_srcs} SSE3 NO_FLAG)
_vc_compile_one_implementation(${_srcs} SSSE3 NO_FLAG)
_vc_compile_one_implementation(${_srcs} SSE4_1 NO_FLAG)
_vc_compile_one_implementation(${_srcs} SSE4_2 NO_FLAG)
_vc_compile_one_implementation(${_srcs} SSE3+SSE4a NO_FLAG)
else()
_vc_compile_one_implementation(${_srcs} SSE2 "-msse2" )
_vc_compile_one_implementation(${_srcs} SSE3 "-msse3" )
_vc_compile_one_implementation(${_srcs} SSSE3 "-mssse3" )
_vc_compile_one_implementation(${_srcs} SSE4_1 "-msse4.1")
_vc_compile_one_implementation(${_srcs} SSE4_2 "-msse4.2")
_vc_compile_one_implementation(${_srcs} SSE3+SSE4a "-msse4a" )
endif()
endif()
if(NOT Vc_AVX_INTRINSICS_BROKEN)
_vc_compile_one_implementation(${_srcs} AVX "-mavx" "/arch:AVX")
if(NOT Vc_XOP_INTRINSICS_BROKEN)
if(NOT Vc_FMA4_INTRINSICS_BROKEN)
_vc_compile_one_implementation(${_srcs} SSE+XOP+FMA4 "-mxop -mfma4" "" "")
_vc_compile_one_implementation(${_srcs} AVX+XOP+FMA4 "-mavx -mxop -mfma4" "" "")
endif()
_vc_compile_one_implementation(${_srcs} SSE+XOP+FMA "-mxop -mfma" "" "")
_vc_compile_one_implementation(${_srcs} AVX+XOP+FMA "-mavx -mxop -mfma" "" "")
endif()
_vc_compile_one_implementation(${_srcs} AVX+FMA "-mavx -mfma" "" "")
endif()
if(NOT Vc_AVX2_INTRINSICS_BROKEN)
# The necessary list is not clear to me yet. At this point I'll only consider Intel CPUs, in
# which case AVX2 implies the availability of FMA and BMI2
#_vc_compile_one_implementation(${_srcs} AVX2 "-mavx2")
#_vc_compile_one_implementation(${_srcs} AVX2+BMI2 "-mavx2 -mbmi2")
_vc_compile_one_implementation(${_srcs} AVX2+FMA+BMI2 "-march=core-avx2" "-mavx2 -mfma -mbmi2" "/arch:AVX2")
#_vc_compile_one_implementation(${_srcs} AVX2+FMA "-mavx2 -mfma")
endif()
list(LENGTH _only_targets _len)
if(_len GREATER 0)
message(WARNING "The following unknown targets where listed in the ONLY list of vc_compile_for_all_implementations: '${_only_targets}'")
endif()
list(LENGTH _disabled_targets _len)
if(_len GREATER 0)
message(WARNING "The following unknown targets where listed in the EXCLUDE list of vc_compile_for_all_implementations: '${_disabled_targets}'")
endif()
endmacro()
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