202 lines
4.4 KiB
CMake
202 lines
4.4 KiB
CMake
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# - Set a number of variables to indicate things about the current CPU and OS
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#
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# CPU_COUNT
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# CPU_INTEL
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# CPU_EXE_64BIT
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# CPU_EXE_32BIT
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# CPU_HAS_SSE
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# CPU_HAS_SSE2
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# CPU_HAS_SSE3
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# CPU_HAS_SSSE3
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# CPU_HAS_SSE4_1
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# CPU_HAS_SSE4_2
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#
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# Requires these CMake modules:
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# no additional modules required
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#
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# Original Author:
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# 2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
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# http://academic.cleardefinition.com
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# Iowa State University HCI Graduate Program/VRAC
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#
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# Copyright Iowa State University 2009-2010.
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# Distributed under the Boost Software License, Version 1.0.
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# (See accompanying file LICENSE_1_0.txt or copy at
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# http://www.boost.org/LICENSE_1_0.txt)
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#
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if(__get_cpu_details)
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return()
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endif()
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set(__get_cpu_details YES)
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function(get_cpu_details)
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option(CPUDETAILS_VERBOSE
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"Should we display results of the CPU info check?"
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NO)
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mark_as_advanced(CPUDETAILS_VERBOSE)
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### See http://www.kitware.com/blog/home/post/63
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if(NOT DEFINED CPU_COUNT)
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# Unknown:
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set(CPU_COUNT 1)
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# Linux:
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set(cpuinfo_file "/proc/cpuinfo")
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if(EXISTS "${cpuinfo_file}")
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file(STRINGS "${cpuinfo_file}" procs REGEX "^processor.: [0-9]+$")
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list(LENGTH procs CPU_COUNT)
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endif()
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# Mac:
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if(APPLE)
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find_program(cmd_sys_pro "system_profiler")
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if(cmd_sys_pro)
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execute_process(COMMAND ${cmd_sys_pro} OUTPUT_VARIABLE info)
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string(REGEX REPLACE "^.*Total Number Of Cores: ([0-9]+).*$" "\\1"
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CPU_COUNT "${info}")
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endif()
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endif()
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# Windows:
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if(WIN32)
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set(CPU_COUNT "$ENV{NUMBER_OF_PROCESSORS}")
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endif()
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endif()
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###
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# CPU_INTEL
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if("${CMAKE_SYSTEM_PROCESSOR}" MATCHES "x86_64" OR "${CMAKE_SYSTEM_PROCESSOR}" MATCHES "i[3456]86")
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set(CPU_INTEL YES)
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elseif(APPLE)
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# Mac Intel boxes return i386 in 10.5 - so assume this is a PPC
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set(CPU_INTEL NO)
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else()
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# TODO: Assuming yes in case of doubt - probably not a great idea
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set(CPU_INTEL YES)
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endif()
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set(CPU_INTEL
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${CPU_INTEL}
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CACHE
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INTERNAL
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"Intel x86 or x86_64 architecture machine?")
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###
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# CPU_EXE_64BIT/32BIT
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if(CMAKE_SIZEOF_VOID_P EQUAL 8)
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set(CPU_EXE_64BIT ON)
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set(CPU_EXE_32BIT OFF)
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else()
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set(CPU_EXE_64BIT OFF)
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set(CPU_EXE_32BIT ON)
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endif()
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###
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# CPU_HAS_SSE/SSE2/SSE3/SSSE3/SSE4.1/SSE4.2
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if(CPU_INTEL)
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if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
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# Use /proc/cpuinfo to find this out.
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file(STRINGS "/proc/cpuinfo" _cpuinfo)
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if(_cpuinfo MATCHES "(sse)|(xmm)")
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set(CPU_HAS_SSE YES)
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else()
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set(CPU_HAS_SSE NO)
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endif()
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if(_cpuinfo MATCHES "(sse2)|(xmm2)")
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set(CPU_HAS_SSE2 YES)
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else()
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set(CPU_HAS_SSE2 NO)
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endif()
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if(_cpuinfo MATCHES "(sse3)|(xmm3)")
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set(CPU_HAS_SSE3 YES)
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else()
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set(CPU_HAS_SSE3 NO)
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endif()
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if(_cpuinfo MATCHES "ssse3")
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set(CPU_HAS_SSSE3 YES)
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else()
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set(CPU_HAS_SSSE3 NO)
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endif()
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if(_cpuinfo MATCHES "(sse4_1)|(xmm4_1)")
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set(CPU_HAS_SSE4_1 YES)
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else()
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set(CPU_HAS_SSE4_1 NO)
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endif()
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if(_cpuinfo MATCHES "(sse4_2)|(xmm4_2)")
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set(CPU_HAS_SSE4_2 YES)
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else()
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set(CPU_HAS_SSE4_2 NO)
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endif()
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elseif(APPLE)
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# Mac OS X Intel requires SSE3
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set(CPU_HAS_SSE YES)
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set(CPU_HAS_SSE2 YES)
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set(CPU_HAS_SSE3 YES)
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set(CPU_HAS_SSSE3 NO)
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set(CPU_HAS_SSE4_1 NO)
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set(CPU_HAS_SSE4_2 NO)
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elseif(WIN32)
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if(CPU_EXE_64BIT)
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#TODO: Assume only common-denominator for 64-bit machines,
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# since I don't know how to check.
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set(CPU_HAS_SSE YES)
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set(CPU_HAS_SSE2 YES)
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set(CPU_HAS_SSE3 NO)
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set(CPU_HAS_SSSE3 NO)
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set(CPU_HAS_SSE4_1 NO)
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set(CPU_HAS_SSE4_2 NO)
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else()
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#TODO: Assume no SSE, since I don't know how to check.
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set(CPU_HAS_SSE NO)
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set(CPU_HAS_SSE2 NO)
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set(CPU_HAS_SSE3 NO)
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set(CPU_HAS_SSSE3 NO)
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set(CPU_HAS_SSE4_1 NO)
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set(CPU_HAS_SSE4_2 NO)
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endif()
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endif()
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endif()
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set(CPU_INTEL
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${CPU_INTEL}
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CACHE
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INTERNAL
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"Intel x86 or x86_64 architecture machine?")
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foreach(_var
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CPU_COUNT
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CPU_EXE_64BIT
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CPU_EXE_32BIT
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CPU_HAS_SSE
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CPU_HAS_SSE2
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CPU_HAS_SSE3
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CPU_HAS_SSSE3
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CPU_HAS_SSE4_1
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CPU_HAS_SSE4_2)
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set(${_var} ${${_var}} CACHE INTERNAL "")
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endforeach()
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if(CPUDETAILS_VERBOSE)
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foreach(_var
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CPU_COUNT
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CPU_INTEL
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CPU_EXE_64BIT
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CPU_EXE_32BIT
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CPU_HAS_SSE
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CPU_HAS_SSE2
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CPU_HAS_SSE3
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CPU_HAS_SSSE3
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CPU_HAS_SSE4_1
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CPU_HAS_SSE4_2)
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get_property(_help CACHE ${_var} PROPERTY HELPSTRING)
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message(STATUS "[get_cpu_details] ${_var} (${_help}): ${${_var}}")
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endforeach()
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endif()
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endfunction()
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