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package platform
// CpuFeatureFlags exposes methods for querying CPU capabilities
type CpuFeatureFlags interface {
// Has returns true when the specified flag (represented as uint64) is supported
Has(cpuFeature CpuFeature) bool
// HasExtra returns true when the specified extraFlag (represented as uint64) is supported
HasExtra(cpuFeature CpuFeature) bool
// Raw returns the raw bitset that represents CPU features used by wazero. This can be used for cache keying.
// For now, we only use four features, so uint64 is enough.
Raw() uint64
}
type CpuFeature uint64
const (
// CpuFeatureAmd64SSE3 is the flag to query CpuFeatureFlags.Has for SSEv3 capabilities on amd64
CpuFeatureAmd64SSE3 CpuFeature = 1
// CpuFeatureAmd64SSE4_1 is the flag to query CpuFeatureFlags.Has for SSEv4.1 capabilities on amd64
CpuFeatureAmd64SSE4_1 CpuFeature = 1 << 19
// CpuFeatureAmd64SSE4_2 is the flag to query CpuFeatureFlags.Has for SSEv4.2 capabilities on amd64
CpuFeatureAmd64SSE4_2 CpuFeature = 1 << 20
// Note: when adding new features, ensure that the feature is included in CpuFeatureFlags.Raw.
)
const (
// CpuExtraFeatureAmd64ABM is the flag to query CpuFeatureFlags.HasExtra for Advanced Bit Manipulation capabilities (e.g. LZCNT) on amd64
CpuExtraFeatureAmd64ABM CpuFeature = 1 << 5
// Note: when adding new features, ensure that the feature is included in CpuFeatureFlags.Raw.
)
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