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32 lines
911 B
32 lines
911 B
// Package cpuid provides generic types used to represent CPU features supported |
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// by the architecture. |
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package cpuid |
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// CPU is a bitset of feature flags representing the capabilities of various CPU |
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// architeectures that this package provides optimized assembly routines for. |
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// |
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// The intent is to provide a stable ABI between the Go code that generate the |
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// assembly, and the program that uses the library functions. |
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type CPU uint64 |
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// Feature represents a single CPU feature. |
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type Feature uint64 |
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const ( |
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// None is a Feature value that has no CPU features enabled. |
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None Feature = 0 |
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// All is a Feature value that has all CPU features enabled. |
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All Feature = 0xFFFFFFFFFFFFFFFF |
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) |
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func (cpu CPU) Has(feature Feature) bool { |
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return (Feature(cpu) & feature) == feature |
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} |
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func (cpu *CPU) Set(feature Feature, enabled bool) { |
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if enabled { |
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*cpu |= CPU(feature) |
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} else { |
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*cpu &= ^CPU(feature) |
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} |
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}
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