STATUS_U_MASK
#define user_mode(regs) (regs->status32 & STATUS_U_MASK)
regs->status32 = STATUS_U_MASK | STATUS_L_MASK | ISA_INIT_STATUS_BITS;
regs->status32 |= STATUS_U_MASK;
(regs->status32 & STATUS_U_MASK) ? "U " : "K ",
(regs->status32 & STATUS_U_MASK) ? "U " : "K ",