95 lines
2.5 KiB
Ruby
95 lines
2.5 KiB
Ruby
require_relative "collector"
|
|
|
|
module Register
|
|
# The Register Machine is an abstraction of the register level. This is seperate from the
|
|
# actual assembler level to allow for several cpu architectures.
|
|
# The Instructions (see class Instruction) define what the machine can do (ie load/store/maths)
|
|
|
|
# The ast is transformed to virtual-machine objects, some of which represent code, some data.
|
|
#
|
|
# The next step transforms to the register machine layer, which is quite close to what actually
|
|
# executes. The step after transforms to Arm, which creates executables.
|
|
#
|
|
|
|
class Machine
|
|
include Collector
|
|
|
|
def initialize
|
|
@objects = {}
|
|
@booted = false
|
|
@constants = []
|
|
end
|
|
attr_reader :constants
|
|
attr_reader :space , :class_mappings , :init , :objects , :booted
|
|
|
|
|
|
# idea being that later method missing could catch translate_xxx and translate to target xxx
|
|
# now we just instantiate ArmTranslater and pass instructions
|
|
def translate_arm
|
|
translator = Arm::Translator.new
|
|
methods = []
|
|
@space.classes.values.each do |c|
|
|
c.instance_methods.each do |f|
|
|
methods << f
|
|
end
|
|
end
|
|
methods.each do |method|
|
|
instruction = method.instructions
|
|
while instruction.next
|
|
nekst = instruction.next
|
|
t = translator.translate(nekst) # returning nil means no replace
|
|
if t
|
|
nekst = t.last
|
|
instruction.replace_next(t)
|
|
end
|
|
instruction = nekst
|
|
end
|
|
end
|
|
label = @init.next
|
|
@init = translator.translate( @init)
|
|
@init.append label
|
|
end
|
|
|
|
|
|
# Objects are data and get assembled after functions
|
|
def add_object o
|
|
return false if @objects[o.object_id]
|
|
return true if o.is_a? Fixnum
|
|
unless o.is_a? Parfait::Object or o.is_a? Symbol or o.is_a? Register::Label
|
|
raise "adding non parfait #{o.class}"
|
|
end
|
|
@objects[o.object_id] = o
|
|
true
|
|
end
|
|
|
|
def boot
|
|
initialize
|
|
boot_parfait!
|
|
@init = Branch.new( "__initial_branch__" , self.space.get_init.instructions )
|
|
@booted = true
|
|
self
|
|
end
|
|
|
|
end
|
|
|
|
# Module function to retrieve singleton
|
|
def self.machine
|
|
unless defined?(@machine)
|
|
@machine = Machine.new
|
|
end
|
|
@machine
|
|
end
|
|
|
|
end
|
|
|
|
Parfait::Method.class_eval do
|
|
# for testing we need to reuse the main function (or do we?)
|
|
# so remove the code that is there
|
|
def clear_source
|
|
self.source.send :initialize , self
|
|
end
|
|
|
|
end
|
|
|
|
require_relative "boot"
|