ID_AA64PFR1_BT_SHIFT
#define ID_AA64PFR1_BT_MASK (UL(0xf) << ID_AA64PFR1_BT_SHIFT)
#define ID_AA64PFR1_BT_NONE (UL(0x0) << ID_AA64PFR1_BT_SHIFT)
#define ID_AA64PFR1_BT_IMPL (UL(0x1) << ID_AA64PFR1_BT_SHIFT)