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35 lines
820 B
Go
35 lines
820 B
Go
// Package cpuinfo gives runtime info about the current CPU.
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//
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// This is a very limited module meant for use internally
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// in this project. For more versatile solution check
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// https://github.com/klauspost/cpuid.
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package cpuinfo
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// HasBMI1 checks whether an x86 CPU supports the BMI1 extension.
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func HasBMI1() bool {
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return hasBMI1
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}
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// HasBMI2 checks whether an x86 CPU supports the BMI2 extension.
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func HasBMI2() bool {
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return hasBMI2
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}
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// DisableBMI2 will disable BMI2, for testing purposes.
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// Call returned function to restore previous state.
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func DisableBMI2() func() {
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old := hasBMI2
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hasBMI2 = false
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return func() {
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hasBMI2 = old
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}
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}
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// HasBMI checks whether an x86 CPU supports both BMI1 and BMI2 extensions.
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func HasBMI() bool {
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return HasBMI1() && HasBMI2()
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}
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var hasBMI1 bool
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var hasBMI2 bool
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