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33 lines
911 B
33 lines
911 B
3 years ago
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// 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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