trying to get function calls to work (but will have to rework regeister handling)

lib/arm/arm_machine.rb

@@ -31,6 +31,7 @@ module Arm
     end
     
     def word_load value , reg
+      raise "nnn " unless reg.class == Symbol
       mov( :left => reg , :right => value )
     end
     def string_load str_lit , reg

lib/arm/logic_instruction.rb

@@ -21,6 +21,9 @@ module Arm
       if( arg.is_a? Fixnum ) #HACK to not have to change the code just now
         arg = Arm::NumLiteral.new( arg )
       end
+      if( arg.is_a? Vm::Signed ) #HACK to not have to change the code just now
+        arg = Arm::NumLiteral.new( arg.value )
+      end
       if (arg.is_a?(Arm::NumLiteral))
         if (arg.value.fits_u8?)
           # no shifting needed
@@ -57,7 +60,6 @@ module Arm
         elsif (arg.type == 'rrx')
           shift_imm = 0
         end
-    
         @operand = rm_ref | (shift_op << 4) | (shift_imm << 4+3)
       else
         raise "invalid operand argument #{arg.inspect} , #{inspect}"
@@ -68,6 +70,7 @@ module Arm
       build
       instuction_class = 0b00 # OPC_DATA_PROCESSING
       val = @operand.is_a?(Symbol) ? reg_code(@operand) : @operand 
+      raise inspect unless reg_code(@rd)
       val |= (reg_code(@rd) <<            12)     
       val |= (reg_code(@rn) <<            12+4)   
       val |= (@update_status_flag << 12+4+4)#20 

lib/ast/function_expression.rb

@@ -2,7 +2,7 @@ module Ast
   class FunctionExpression < Expression
     attr_reader  :name, :params, :block
     def initialize name, params, block
-      @name, @params, @block = name, params, block
+      @name, @params, @block = name.to_sym, params, block
     end
     def attributes
       [:name, :params, :block]
@@ -16,6 +16,7 @@ module Ast
     def compile context
       args = params.collect{|p| Vm::Value.type p.name }
       function = Vm::Function.new(name ,args )
+      context.program.add_function function
       parent_locals = context.locals
       context.locals = {}
       block.each do |b|

lib/vm/function.rb

@@ -56,6 +56,7 @@ module Vm
     
     def assemble io
       @entry.assemble(io)
+      raise @body.inspect
       @body.assemble(io)
       @exit.assemble(io)
     end

lib/vm/function_call.rb

@@ -14,14 +14,14 @@ module Vm
     def assign_function context
       @function = context.program.get_function @name
       if @function
-        raise "error #{self}" unless @function.arity != args.length
+        raise "error #{self} , #{@function.args.length} != #{args.length}" if @function.arity != args.length
       else
         @function = context.program.get_or_create_function @name
       end
     end
     def load_args
       args.each_with_index do |arg , index|
-        add_code arg.load(index)
+        add_code arg.load("r#{index}".to_sym)
       end
     end
 

lib/vm/program.rb

@@ -43,14 +43,21 @@ module Vm
       @objects << o # TODO check type , no basic values allowed (must be wrapped)
     end
     
+    def add_function function
+      raise "not a function #{function}" unless function.is_a? Function
+      @functions << function
+    end
+
     def get_function name
-      @functions.detect{ |f| (f.name == name) && (f.class == Function) }
+      name = name.to_sym
+      @functions.detect{ |f| (f.name == name) }
     end
 
     # preferred way of creating new functions (also forward declarations, will flag unresolved later)
     def get_or_create_function name 
       fun = get_function name
       unless fun
+        puts @functions.inspect
         fun = Function.new(name)
         block = Core::Kernel.send(name)
         fun.set_body block

lib/vm/values.rb

@@ -24,6 +24,8 @@ module Vm
     def initialize value
       @value = value
     end
+    attr_reader :value
+    
     #naming convention to infer types in kernel functions. Kernel types are basic types, ie see below
     # 
     def self.type name
@@ -41,6 +43,9 @@ module Vm
     def load reg
       Machine.instance.word_load self , reg
     end
+    def length
+      4
+    end
   end
   
   class Unsigned < Word

test/runners/foo.rb

@@ -2,4 +2,4 @@ def foo(x)
   a = 5
 end
 
-foo( 3 )
+foo( 3 )

test/test_runner.rb

@@ -26,7 +26,7 @@ class TestRunner < MiniTest::Test
     # file is a list of expressions, al but the last must be a function
     # and the last is wrapped as a main
     parts.each_with_index do |part,index|
-      puts "parsing #{index}=#{part}"
+      puts "parsing #{index}=#{part.inspect}"
       expr    = part.compile( program.context )
       if index = parts.length
         program.main = expr