107 lines
3.0 KiB
Ruby
107 lines
3.0 KiB
Ruby
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# Copyright 2009 Max Howell and other contributors.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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class Hardware
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# These methods use info spewed out by sysctl.
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# Look in <mach/machine.h> for decoding info.
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def self.cpu_type
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@@cpu_type ||= `/usr/sbin/sysctl -n hw.cputype`.to_i
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case @@cpu_type
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when 7
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:intel
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when 18
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:ppc
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else
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:dunno
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end
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end
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def self.intel_family
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@@intel_family ||= `/usr/sbin/sysctl -n hw.cpufamily`.to_i
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case @@intel_family
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when 0x73d67300 # Yonah: Core Solo/Duo
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:core
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when 0x426f69ef # Merom: Core 2 Duo
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:core2
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when 0x78ea4fbc # Penryn
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:penryn
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when 0x6b5a4cd2 # Nehalem
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:nehalem
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else
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:dunno
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end
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end
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def self.processor_count
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@@processor_count ||= `/usr/sbin/sysctl -n hw.ncpu`.to_i
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end
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def self.gcc_march # what to pass to gcc
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@@gcc_march ||= if self.cpu_type == :intel
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case self.intel_family
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when :core
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" -march=prescott"
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when :core2, :penryn, :nehalem
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# GCC 4.3 has a -march=core2, but this isn't 4.3 and nocona is correct
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" -march=nocona"
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end
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else
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""
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end
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end
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def self.gcc_msse # what to pass to gcc
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# avoid sse4 for now in case it blows up
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@@gcc_msse ||= if sysctl_bool("hw.optional.sse3")
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" -msse3 -mfpmath=sse"
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else
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""
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end
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end
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def self.gcc_mmmx # what to pass to gcc
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@@gcc_mmmx ||= if sysctl_bool("hw.optional.mmx")
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" -mmmx"
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else
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""
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end
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end
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def self.is_64bit?
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@@is_64bit ||= sysctl_bool("hw.cpu64bit_capable")
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end
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protected
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def self.sysctl_bool(property)
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result = nil
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IO.popen("/usr/sbin/sysctl -n #{property} 2>/dev/null") do |f|
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result = f.gets.to_i # should be 0 or 1
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end
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$?.success? && result == 1 # sysctl call succeded and printed 1
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end
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end
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