* s390-tdep.c (op_bctr, op_bctgr, op_bct, op1_bctg, op2_bctg,

	* s390-tdep.c (op_bctr, op_bctgr, op_bct, op1_bctg, op2_bctg,
	op_bxh, op1_bxhg, op2_bxhg, op_bxle, op1_bxleg, op2_bxleg,
	op1_brct, op2_brct, op1_brctg, op2_brctg, op_brxh, op1_brxhg,
	op2_brxhg, op_brxle, op1_brxlg, op2_brxlg): New enum values.
	(is_rsi, is_rie): New insn format decoder routines.
	(s390_displaced_step_fixup): New function.
	(s390_gdbarch_init): Install displaced stepping routines.