so close i can smell it, checkpoint

lib/arm/arm_machine.rb

@@ -1,8 +1,35 @@
 require "vm/machine"
+require_relative "instruction"
+require_relative "stack_instruction"
+require_relative "logic_instruction"
+require_relative "memory_instruction"
+require_relative "call_instruction"
 
 module Arm
   class ArmMachine < Vm::Machine
     
+    # defines a method in the current class, with the name inst (first erg) 
+    # the method instantiates an instruction of the given class which gets passed a single hash as arg
+    
+    # gets called for every "standard" instruction. 
+    # may be used for machine specific ones too
+    def define_instruction inst , clazz
+      super
+      return
+      # need to use create_method and move to options hash
+      define_method("#{inst}s") do |*args|
+        instruction clazz , inst , :al , 1 , *args
+      end
+      ArmMachine::COND_CODES.keys.each do |suffix|
+        define_method("#{inst}#{suffix}") do |options|
+          instruction clazz , inst , suffix , 0 , *args
+        end
+        define_method("#{inst}s#{suffix}") do |options|
+          instruction clazz , inst , suffix , 1 , *args
+        end
+      end
+    end
+  
     def word_load value
       "word"
     end
@@ -12,9 +39,17 @@ module Arm
 
     def main_entry
       e = Vm::Block.new("main_entry")
+      e.add_code( mov( :left => :fp , :right => 0 ))
     end
     def main_exit
       e = Vm::Block.new("main_exit")
+      e.join( syscall(0) )
+    end
+    def syscall num
+      e = Vm::Block.new("syscall")
+      e.add_code( MoveInstruction.new( 7 , num ) )
+      e.add_code( CallInstruction.new( :swi ) )
+      e
     end
   end
 end