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