tf_xer
tf->tf_lr, tf->tf_ctr, tf->tf_cr, tf->tf_xer);
tf->tf_xer = sc.sc_frame.xer;
utf->xer = tf->tf_xer;
tf->tf_xer = utf->xer;
DDB_REGS->xer = tf->tf_xer;
tf->tf_xer = DDB_REGS->xer;
tf->tf_lr, tf->tf_cr, tf->tf_xer, tf->tf_ctr);
R(&tf->tf_xer),
regs->xer = tf->tf_xer;
tf->tf_xer = regs->xer;
gr[_REG_XER] = tf->tf_xer;
tf->tf_xer = gr[_REG_XER];
linux_regs.lxer = tf->tf_xer;
tf->tf_xer = lregs->lxer;
tf->tf_xer = lregs->lxer;