"tls_maximum_protocol_version": "TLSv1_3",
             "cipher_suites": [
              "ECDHE-ECDSA-AES256-GCM-SHA384",
              "ECDHE-RSA-AES256-GCM-SHA384",
              "ECDHE-ECDSA-AES128-GCM-SHA256",
              "ECDHE-RSA-AES128-GCM-SHA256",
              "AES256-GCM-SHA384",
              "AES128-GCM-SHA256"
             ]
            },
            "alpn_protocols": [

					CipherSuites: []string{"ECDHE-ECDSA-AES128-SHA", "ECDHE-RSA-AES256-GCM-SHA384"},
				},
			},
			result: &auth.DownstreamTlsContext{
				CommonTlsContext: &auth.CommonTlsContext{
					TlsParams: &auth.TlsParameters{
						EcdhCurves:   []string{"P-256", "P-384"},
						CipherSuites: []string{"ECDHE-ECDSA-AES128-SHA", "ECDHE-RSA-AES256-GCM-SHA384"},
					},
					AlpnProtocols: util.ALPNHttp,

	avxEscape = 1 << 6

	// P field - 2 bits
	vex66 = 1 << 0
	vexF3 = 2 << 0
	vexF2 = 3 << 0
	// L field - 1 bit
	vexLZ  = 0 << 2
	vexLIG = 0 << 2
	vex128 = 0 << 2
	vex256 = 1 << 2
	// W field - 1 bit
	vexWIG = 0 << 7
	vexW0  = 0 << 7
	vexW1  = 1 << 7
	// M field - 5 bits, but mostly reserved; we can store up to 3
	vex0F   = 1 << 3
	vex0F38 = 2 << 3
	vex0F3A = 3 << 3
)