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module MacCPUs
OPTIMIZATION_FLAGS = {
:penryn => '-march=core2 -msse4.1',
:core2 => '-march=core2',
:core => '-march=prescott',
:g3 => '-mcpu=750',
:g4 => '-mcpu=7400',
:g4e => '-mcpu=7450',
:g5 => '-mcpu=970'
}
def optimization_flags; OPTIMIZATION_FLAGS.dup; end
# These methods use info spewed out by sysctl.
# Look in <mach/machine.h> for decoding info.
def type
@type ||= `/usr/sbin/sysctl -n hw.cputype`.to_i
case @type
when 7
:intel
when 18
:ppc
else
:dunno
end
end
def family
if type == :intel
@intel_family ||= `/usr/sbin/sysctl -n hw.cpufamily`.to_i
case @intel_family
when 0x73d67300 # Yonah: Core Solo/Duo
:core
when 0x426f69ef # Merom: Core 2 Duo
:core2
when 0x78ea4fbc # Penryn
:penryn
when 0x6b5a4cd2 # Nehalem
:nehalem
when 0x573B5EEC # Arrandale
:arrandale
when 0x5490B78C # Sandy Bridge
:sandybridge
when 0x1F65E835 # Ivy Bridge
:ivybridge
else
:dunno
end
elsif type == :ppc
@ppc_family ||= `/usr/sbin/sysctl -n hw.cpusubtype`.to_i
case @ppc_family
when 9
:g3 # PowerPC 750
when 10
:g4 # PowerPC 7400
when 11
:g4e # PowerPC 7450
when 100
:g5 # PowerPC 970
else
:dunno
end
end
end
def cores
@cores ||= `/usr/sbin/sysctl -n hw.ncpu`.to_i
end
def bits
return @bits if defined? @bits
is_64_bit = sysctl_bool("hw.cpu64bit_capable")
@bits ||= is_64_bit ? 64 : 32
end
def altivec?
type == :ppc && family != :g3
end
def avx?
pre_sandy = [:core, :core2, :penryn, :nehalem, :arrandale].include? family
type == :intel && !pre_sandy
end
def sse3?
type == :intel
end
def sse4?
type == :intel && (family != :core && family != :core2)
end
protected
def sysctl_bool(property)
result = nil
IO.popen("/usr/sbin/sysctl -n #{property} 2>/dev/null") do |f|
result = f.gets.to_i # should be 0 or 1
end
$?.success? && result == 1 # sysctl call succeded and printed 1
end
end
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