state[14] = binary.LittleEndian.Uint32(nonce[4:8])
	state[15] = binary.LittleEndian.Uint32(nonce[8:12])
}

func (c *chacha20poly1305) seal(dst, nonce, plaintext, additionalData []byte) []byte {
	if !cpu.X86.HasSSSE3 {
		return c.sealGeneric(dst, nonce, plaintext, additionalData)
	}

	var state [16]uint32
	setupState(&state, &c.key, nonce)

	ret, out := sliceForAppend(dst, len(plaintext)+16)

		{Name: "rdseed", Feature: &X86.HasRDSEED},
		{Name: "sse3", Feature: &X86.HasSSE3},
		{Name: "sse41", Feature: &X86.HasSSE41},
		{Name: "sse42", Feature: &X86.HasSSE42},
		{Name: "ssse3", Feature: &X86.HasSSSE3},

		// These capabilities should always be enabled on amd64:
		{Name: "sse2", Feature: &X86.HasSSE2, Required: runtime.GOARCH == "amd64"},
	}
}

func archInit() {

	Initialized = true

			option{Name: "sse3", Feature: &X86.HasSSE3},
			option{Name: "sse41", Feature: &X86.HasSSE41},
			option{Name: "sse42", Feature: &X86.HasSSE42},
			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},

	HasBMI1      bool
	HasBMI2      bool
	HasERMS      bool
	HasFMA       bool
	HasOSXSAVE   bool
	HasPCLMULQDQ bool
	HasPOPCNT    bool
	HasRDTSCP    bool
	HasSHA       bool
	HasSSE3      bool
	HasSSSE3     bool
	HasSSE41     bool
	HasSSE42     bool
	_            CacheLinePad
}

// The booleans in ARM contain the correspondingly named cpu feature bit.
// The struct is padded to avoid false sharing.

	HasRDSEED           bool // RDSEED instruction (on-chip random number generator)
	HasSSE2             bool // Streaming SIMD extension 2 (always available on amd64)
	HasSSE3             bool // Streaming SIMD extension 3
	HasSSSE3            bool // Supplemental streaming SIMD extension 3
	HasSSE41            bool // Streaming SIMD extension 4 and 4.1
	HasSSE42            bool // Streaming SIMD extension 4 and 4.2
	_                   CacheLinePad
}

var hashkey [4]uintptr

func alginit() {
	// Install AES hash algorithms if the instructions needed are present.
	if (GOARCH == "386" || GOARCH == "amd64") &&
		cpu.X86.HasAES && // AESENC
		cpu.X86.HasSSSE3 && // PSHUFB
		cpu.X86.HasSSE41 { // PINSR{D,Q}
		initAlgAES()
		return
	}
	if GOARCH == "arm64" && cpu.ARM64.HasAES {
		initAlgAES()
		return
	}
	for i := range hashkey {