putstring unfolds length

which means sys call doesn’t need to
and also interpreter sometimes gets a symbol length

lib/arm/translator.rb

@@ -128,14 +128,13 @@ module Arm
     end
 
     def putstring int_code
-      codes = ArmMachine.ldr( :r2 ,  :r1 , 8 ) # String length
-      codes.append ArmMachine.add( :r1 ,  :r1 , 12 ) # adjust for object header
+      codes = ArmMachine.add( :r1 ,  :r1 , 12 ) # adjust for object header
       codes.append ArmMachine.mov( :r0 ,  1 )  # write to stdout == 1
       syscall(int_code , codes )
     end
 
     def exit int_code
-      codes = Register::Label.new(nil , "exit")
+      codes =  ArmMachine.ldr( :r0 ,  :r0 , arm_index(Register.resolve_index(:Message , :return_value)) )
       syscall int_code , codes
     end
 

lib/interpreter/interpreter.rb

@@ -121,7 +121,15 @@ module Interpreter
       else
         index = get_register(@instruction.index)
       end
-      value = object.get_internal( index )
+      if object.is_a?(Symbol)
+        if( index == 2 )
+          value = object.to_s.length
+        else
+          raise "Unsupported action, must convert symbol to word:#{object}"
+        end
+      else
+        value = object.get_internal( index )
+      end
       #value = value.object_id unless value.is_a? Fixnum
       set_register( @instruction.register , value )
       true

lib/register/builtin/word.rb

@@ -5,6 +5,9 @@ module Register
         def putstring context
           compiler = Soml::Compiler.new.create_method(:Word , :putstring ).init_method
           compiler.add_code Register.get_slot( "putstring" , :message , :receiver , :new_message )
+          index = Parfait::Word.get_length_index
+          reg = RegisterValue.new(:r2 , :Integer)
+          compiler.add_code Register.get_slot( "putstring" , :new_message , index , reg )
           Kernel.emit_syscall( compiler , :putstring )
           compiler.method
         end