* Copyright (c) 2016, 2019 SAP SE. All rights reserved.

    return 2;

    return "s390";

  static bool valid_opcodes[256];

  static bool is_valid_opcode_at(address here);

  // Find preceding instruction.

  //

  // Starting at the passed location, the n-th preceding (towards lower addresses)

  // location is searched, the contents of which - if interpreted as

  // instructions - has the passed location as n-th successor.

  //  - If multiple such locations exist between (here-n*instr_maxlen()) and here,

  //    the most distant location is selected.

  //  - If no such location exists, NULL is returned. The caller should then

  //    terminate its search and react properly.

  static address find_prev_instr(address here, int n_instr);

  static int     count_instr(address begin, address end);

  // special-case instruction decoding.

  // There may be cases where the binutils disassembler doesn't do

  // the perfect job. In those cases, decode_instruction0 may kick in

  // and do it right.

  // If nothing had to be done, just return "here", otherwise return "here + instr_len(here)"

  static address decode_instruction0(address here, outputStream* st, address virtual_begin = NULL);

  // platform-specific instruction annotations (like value of loaded constants)

  static void annotate(address pc, outputStream* st);