option{Name: "ssse3", Feature: &X86.HasSSSE3})
	}
	if level < 3 {
		// These options are required at level 3. At lower levels
		// they can be turned off.
		options = append(options,
			option{Name: "avx", Feature: &X86.HasAVX},
			option{Name: "avx2", Feature: &X86.HasAVX2},
			option{Name: "bmi1", Feature: &X86.HasBMI1},
			option{Name: "bmi2", Feature: &X86.HasBMI2},
			option{Name: "fma", Feature: &X86.HasFMA})
	}
	if level < 4 {

// The booleans in X86 contain the correspondingly named cpuid feature bit.
// HasAVX and HasAVX2 are only set if the OS does support XMM and YMM registers
// in addition to the cpuid feature bit being set.
// The struct is padded to avoid false sharing.
var X86 struct {
	_            CacheLinePad
	HasAES       bool
	HasADX       bool
	HasAVX       bool
	HasAVX2      bool
	HasAVX512F   bool
	HasAVX512BW  bool
	HasAVX512VL  bool

//
// X86 is padded to avoid false sharing. Further the HasAVX
// and HasAVX2 are only set if the OS supports XMM and YMM
// registers in addition to the CPUID feature bit being set.
var X86 struct {
	_                   CacheLinePad
	HasAES              bool // AES hardware implementation (AES NI)
	HasADX              bool // Multi-precision add-carry instruction extensions
	HasAVX              bool // Advanced vector extension