working on registers, awip (a work in progress)

lib/arm/arm_machine.rb

@@ -10,6 +10,10 @@ require_relative "constants"
 module Arm
   class ArmMachine < Vm::RegisterMachine
 
+    def integer_equals block ,  left , right
+      block <<  cmp( left ,  right )
+      Vm::BranchCondition.new :eq
+    end
     def integer_less_or_equal block ,  left , right
       block <<  cmp( left ,  right )
       Vm::BranchCondition.new :le

lib/arm/move_instruction.rb

@@ -12,6 +12,10 @@ module Arm
 
       @immediate = 0      
       @rn = :r0 # register zero = zero bit pattern
+      raise inspect if  to.is_a?(Vm::Value) and 
+                        from.is_a?(Vm::Value) and 
+                        !@attributes[:shift_lsr] and
+                        to.register == from.register
     end
     
     # arm intrucions are pretty sensible, and always 4 bytes (thumb not supported)