module Risc

  # RegToSlot moves data into memory from a register.
  # SlotToReg moves data into a register from memory.
  # Both use a base memory (a register)

  # This is because that is what cpu's can do. In programming terms this would be accessing
  #  an element in an array, in the case of RegToSlot setting the register in the array.

  # btw: to move data between registers, use Transfer

  class RegToSlot < Setter

  end

  # Produce a RegToSlot instruction.
  # From and to are registers or symbols that can be transformed to a register by resolve_to_register
  #     (which are precisely the symbols :message or :new_message. or a register)
  # index resolves with resolve_to_index.
  def self.reg_to_slot( source , from_reg , to , index )
    from = resolve_to_register from_reg
    index = resolve_to_index( to , index)
    to = resolve_to_register to
    RegToSlot.new( source, from , to , index)
  end

end