IXGBE_ATR_SIGNATURE_HASH_KEY
IXGBE_WRITE_REG(hw, IXGBE_FDIRSKEY, IXGBE_ATR_SIGNATURE_HASH_KEY);
(IXGBE_ATR_BUCKET_HASH_KEY & IXGBE_ATR_SIGNATURE_HASH_KEY)
else if (IXGBE_ATR_SIGNATURE_HASH_KEY & (0x01 << n)) \
else if (IXGBE_ATR_SIGNATURE_HASH_KEY & (0x01 << (n + 16))) \