* s390-dis.c (s390_extract_operand): Add support for long displacements.

    * s390-dis.c (s390_extract_operand): Add support for long displacements.
        * s390-mkopc.c (s390_opcode_cpu_val): Add support for cpu type z990.
        * s390-opc.c (D20_20): Add define for 20 bit displacements.
        (INSTR_RRF_R0RR, INSTR_RSL_R0RD, INSTR_RSY_RRRD, INSTR_RSY_RURD,
        INSTR_RSY_AARD, INSTR_RXY_RRRD, INSTR_RXY_FRRD, INSTR_SIY_URD): Add
        new instruction formats.
        (MASK_RRF_R0RR, MASK_RSL_R0RD, MASK_RSY_RRRD, MASK_RSY_RURD,
        MASK_RSY_AARD, MASK_RXY_RRRD, MASK_RXY_FRRD, MASK_SIY_URD): Likewise.
        (s390_opformats): Likewise.
        * s390-opc.txt: Add new instructions for cpu type z990. Add missing
        hfp instructions. Add missing instructions pgin, pgout and xsch.