102 lines
2.6 KiB
Ruby
102 lines
2.6 KiB
Ruby
# frozen_string_literal: true
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module Hardware
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class CPU
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class << self
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native_arch = (ENV["HOMEBREW_ARCH"] || "native").freeze
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OPTIMIZATION_FLAGS_LINUX = {
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native: "-march=#{native_arch}",
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nehalem: "-march=nehalem",
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core2: "-march=core2",
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core: "-march=prescott",
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armv6: "-march=armv6",
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armv8: "-march=armv8-a",
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}.freeze
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def optimization_flags
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OPTIMIZATION_FLAGS_LINUX
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end
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def cpuinfo
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@cpuinfo ||= File.read("/proc/cpuinfo")
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end
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def family
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return :arm if arm?
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return :ppc if ppc?
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return :dunno unless intel?
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# See https://software.intel.com/en-us/articles/intel-architecture-and-processor-identification-with-cpuid-model-and-family-numbers
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# and https://github.com/llvm-mirror/llvm/blob/master/lib/Support/Host.cpp
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# and https://en.wikipedia.org/wiki/List_of_Intel_CPU_microarchitectures#Roadmap
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cpu_family = cpuinfo[/^cpu family\s*: ([0-9]+)/, 1].to_i
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cpu_model = cpuinfo[/^model\s*: ([0-9]+)/, 1].to_i
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unknown = :"unknown_0x#{cpu_family.to_s(16)}_0x#{cpu_model.to_s(16)}"
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case cpu_family
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when 0x06
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case cpu_model
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when 0x3a, 0x3e
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:ivybridge
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when 0x2a, 0x2d
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:sandybridge
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when 0x25, 0x2c, 0x2f
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:westmere
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when 0x1e, 0x1a, 0x2e
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:nehalem
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when 0x17, 0x1d
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:penryn
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when 0x0f, 0x16
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:merom
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when 0x0d
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:dothan
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when 0x36, 0x26, 0x1c
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:atom
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when 0x3c, 0x3f, 0x46
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:haswell
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when 0x3d, 0x47, 0x4f, 0x56
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:broadwell
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when 0x4e, 0x55, 0x5e, 0x8e, 0x9e
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:skylake
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else
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unknown
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end
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when 0x0f
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case cpu_model
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when 0x06
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:presler
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when 0x03, 0x04
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:prescott
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else
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unknown
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end
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else
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unknown
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end
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end
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def flags
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@flags ||= cpuinfo[/^(flags|Features).*/, 0]&.split
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@flags ||= []
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end
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# Compatibility with Mac method, which returns lowercase symbols
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# instead of strings
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def features
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@features ||= flags[1..-1].map(&:intern)
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end
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%w[aes altivec avx avx2 lm ssse3 sse4_2].each do |flag|
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define_method(flag + "?") { flags.include? flag }
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end
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def sse3?
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flags.include?("pni") || flags.include?("sse3")
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end
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def sse4?
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flags.include? "sse4_1"
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end
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end
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end
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end
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