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36 lines
1.5 KiB
Go
36 lines
1.5 KiB
Go
package platform
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// CpuFeatureFlags exposes methods for querying CPU capabilities
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type CpuFeatureFlags interface {
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// Has returns true when the specified flag (represented as uint64) is supported
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Has(cpuFeature CpuFeature) bool
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// HasExtra returns true when the specified extraFlag (represented as uint64) is supported
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HasExtra(cpuFeature CpuFeature) bool
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// Raw returns the raw bitset that represents CPU features used by wazero. This can be used for cache keying.
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// For now, we only use four features, so uint64 is enough.
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Raw() uint64
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}
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type CpuFeature uint64
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const (
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// CpuFeatureAmd64SSE3 is the flag to query CpuFeatureFlags.Has for SSEv3 capabilities on amd64
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CpuFeatureAmd64SSE3 CpuFeature = 1
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// CpuFeatureAmd64SSE4_1 is the flag to query CpuFeatureFlags.Has for SSEv4.1 capabilities on amd64
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CpuFeatureAmd64SSE4_1 CpuFeature = 1 << 19
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// CpuFeatureAmd64SSE4_2 is the flag to query CpuFeatureFlags.Has for SSEv4.2 capabilities on amd64
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CpuFeatureAmd64SSE4_2 CpuFeature = 1 << 20
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// Note: when adding new features, ensure that the feature is included in CpuFeatureFlags.Raw.
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)
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const (
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// CpuExtraFeatureAmd64ABM is the flag to query CpuFeatureFlags.HasExtra for Advanced Bit Manipulation capabilities (e.g. LZCNT) on amd64
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CpuExtraFeatureAmd64ABM CpuFeature = 1 << 5
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// Note: when adding new features, ensure that the feature is included in CpuFeatureFlags.Raw.
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)
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const (
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// CpuFeatureArm64Atomic is the flag to query CpuFeatureFlags.Has for Large System Extensions capabilities on arm64
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CpuFeatureArm64Atomic CpuFeature = 1 << 21
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)
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