55 lines
1.7 KiB
Ruby
55 lines
1.7 KiB
Ruby
module Arm
|
|
# The arm machine has following instruction classes
|
|
# - Memory
|
|
# - Stack
|
|
# - Logic
|
|
# - Math
|
|
# - Control/Compare
|
|
# - Move
|
|
# - Call class Instruction
|
|
class Instruction
|
|
def initialize options
|
|
@attributes = options
|
|
end
|
|
attr_reader :attributes
|
|
def opcode
|
|
@attributes[:opcode]
|
|
end
|
|
def position
|
|
raise "position accessed but not set at #{length} for #{self.inspect}" if @position == nil
|
|
@position
|
|
end
|
|
def set_position pos
|
|
# resetting of position used to be error, but since relink and dynamic instruction size it is ok. in measures
|
|
if @position != nil and ((@position - pos).abs > 32)
|
|
raise "position set again #{pos}!=#{@position} for #{self}"
|
|
end
|
|
@position = pos
|
|
end
|
|
|
|
# this is giving read access to the attributes hash via .attibute syntax
|
|
# so for an instruction pop you can write pop.opcode to get the :opcode attribute
|
|
|
|
# TODDO: review (don't remember what the "set_" stuff was for)
|
|
def method_missing name , *args , &block
|
|
return super unless (args.length <= 1) or block_given?
|
|
set , attribute = name.to_s.split("set_")
|
|
if set == ""
|
|
@attributes[attribute.to_sym] = args[0] || 1
|
|
return self
|
|
else
|
|
return super
|
|
end
|
|
return @attributes[name.to_sym]
|
|
end
|
|
end
|
|
end
|
|
|
|
require_relative "constants"
|
|
require_relative "instructions/call_instruction"
|
|
require_relative "instructions/compare_instruction"
|
|
require_relative "instructions/logic_instruction"
|
|
require_relative "instructions/memory_instruction"
|
|
require_relative "instructions/move_instruction"
|
|
require_relative "instructions/stack_instruction"
|