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