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diff --git a/ortho/mcode/ortho_code-consts.adb b/ortho/mcode/ortho_code-consts.adb
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+++ b/ortho/mcode/ortho_code-consts.adb
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+--  Mcode back-end for ortho - Constants handling.
+--  Copyright (C) 2006 Tristan Gingold
+--
+--  GHDL is free software; you can redistribute it and/or modify it under
+--  the terms of the GNU General Public License as published by the Free
+--  Software Foundation; either version 2, or (at your option) any later
+--  version.
+--
+--  GHDL is distributed in the hope that it will be useful, but WITHOUT ANY
+--  WARRANTY; without even the implied warranty of MERCHANTABILITY or
+--  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+--  for more details.
+--
+--  You should have received a copy of the GNU General Public License
+--  along with GCC; see the file COPYING.  If not, write to the Free
+--  Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+--  02111-1307, USA.
+with Ada.Unchecked_Conversion;
+with GNAT.Table;
+with Ada.Text_IO;
+with Ortho_Code.Types; use Ortho_Code.Types;
+with Ortho_Code.Debug;
+
+package body Ortho_Code.Consts is
+   type Cnode_Common is record
+      Kind : OC_Kind;
+      Lit_Type : O_Tnode;
+   end record;
+
+   type Cnode_Signed is record
+      Val : Integer_64;
+   end record;
+
+   type Cnode_Unsigned is record
+      Val : Unsigned_64;
+   end record;
+
+   type Cnode_Float is record
+      Val : IEEE_Float_64;
+   end record;
+
+   type Cnode_Enum is record
+      Id : O_Ident;
+      Val : Uns32;
+   end record;
+
+   type Cnode_Addr is record
+      Decl : O_Dnode;
+      Pad : Int32;
+   end record;
+
+   type Cnode_Aggr is record
+      Els : Int32;
+      Nbr : Int32;
+   end record;
+
+   type Cnode_Sizeof is record
+      Atype : O_Tnode;
+      Pad : Int32;
+   end record;
+
+   package Cnodes is new GNAT.Table
+     (Table_Component_Type => Cnode_Common,
+      Table_Index_Type => O_Cnode,
+      Table_Low_Bound => 2,
+      Table_Initial => 128,
+      Table_Increment => 100);
+
+   function Get_Const_Kind (Cst : O_Cnode) return OC_Kind is
+   begin
+      return Cnodes.Table (Cst).Kind;
+   end Get_Const_Kind;
+
+   function Get_Const_Type (Cst : O_Cnode) return O_Tnode is
+   begin
+      return Cnodes.Table (Cst).Lit_Type;
+   end Get_Const_Type;
+
+   function Get_Const_U64 (Cst : O_Cnode) return Unsigned_64
+   is
+      function To_Cnode_Unsigned is new Ada.Unchecked_Conversion
+        (Cnode_Common, Cnode_Unsigned);
+   begin
+      return To_Cnode_Unsigned (Cnodes.Table (Cst  + 1)).Val;
+   end Get_Const_U64;
+
+   function Get_Const_I64 (Cst : O_Cnode) return Integer_64
+   is
+      function To_Cnode_Signed is new Ada.Unchecked_Conversion
+        (Cnode_Common, Cnode_Signed);
+   begin
+      return To_Cnode_Signed (Cnodes.Table (Cst  + 1)).Val;
+   end Get_Const_I64;
+
+   function To_Cnode_Common is new Ada.Unchecked_Conversion
+     (Source => Cnode_Signed, Target => Cnode_Common);
+
+   function New_Signed_Literal (Ltype : O_Tnode; Value : Integer_64)
+                               return O_Cnode
+   is
+      Res : O_Cnode;
+   begin
+      Cnodes.Append (Cnode_Common'(Kind => OC_Signed,
+                                   Lit_Type => Ltype));
+      Res := Cnodes.Last;
+      Cnodes.Append (To_Cnode_Common (Cnode_Signed'(Val => Value)));
+      return Res;
+   end New_Signed_Literal;
+
+   function To_Cnode_Common is new Ada.Unchecked_Conversion
+     (Source => Cnode_Unsigned, Target => Cnode_Common);
+
+   function New_Unsigned_Literal (Ltype : O_Tnode; Value : Unsigned_64)
+                                 return O_Cnode
+   is
+      Res : O_Cnode;
+   begin
+      Cnodes.Append (Cnode_Common'(Kind => OC_Unsigned,
+                                   Lit_Type => Ltype));
+      Res := Cnodes.Last;
+      Cnodes.Append (To_Cnode_Common (Cnode_Unsigned'(Val => Value)));
+      return Res;
+   end New_Unsigned_Literal;
+
+--    function Get_Const_Literal (Cst : O_Cnode) return Uns32 is
+--    begin
+--       return Cnodes.Table (Cst).Val;
+--    end Get_Const_Literal;
+
+   function To_Uns64 is new Ada.Unchecked_Conversion
+     (Source => Cnode_Common, Target => Uns64);
+
+   function Get_Const_U32 (Cst : O_Cnode) return Uns32 is
+   begin
+      return Uns32 (To_Uns64 (Cnodes.Table (Cst + 1)));
+   end Get_Const_U32;
+
+   function Get_Const_R64 (Cst : O_Cnode) return Uns64 is
+   begin
+      return To_Uns64 (Cnodes.Table (Cst + 1));
+   end Get_Const_R64;
+
+   function Get_Const_Low (Cst : O_Cnode) return Uns32
+   is
+      V : Uns64;
+   begin
+      V := Get_Const_R64 (Cst);
+      return Uns32 (V and 16#Ffff_Ffff#);
+   end Get_Const_Low;
+
+   function Get_Const_High (Cst : O_Cnode) return Uns32
+   is
+      V : Uns64;
+   begin
+      V := Get_Const_R64 (Cst);
+      return Uns32 (Shift_Right (V, 32) and 16#Ffff_Ffff#);
+   end Get_Const_High;
+
+   function Get_Const_Low (Cst : O_Cnode) return Int32
+   is
+      V : Uns64;
+   begin
+      V := Get_Const_R64 (Cst);
+      return To_Int32 (Uns32 (V and 16#Ffff_Ffff#));
+   end Get_Const_Low;
+
+   function Get_Const_High (Cst : O_Cnode) return Int32
+   is
+      V : Uns64;
+   begin
+      V := Get_Const_R64 (Cst);
+      return To_Int32 (Uns32 (Shift_Right (V, 32) and 16#Ffff_Ffff#));
+   end Get_Const_High;
+
+   function To_Cnode_Common is new Ada.Unchecked_Conversion
+      (Source => Cnode_Float, Target => Cnode_Common);
+
+   function New_Float_Literal (Ltype : O_Tnode; Value : IEEE_Float_64)
+                              return O_Cnode
+   is
+      Res : O_Cnode;
+   begin
+      Cnodes.Append (Cnode_Common'(Kind => OC_Float,
+                                   Lit_Type => Ltype));
+      Res := Cnodes.Last;
+      Cnodes.Append (To_Cnode_Common (Cnode_Float'(Val => Value)));
+      return Res;
+   end New_Float_Literal;
+
+   function New_Null_Access (Ltype : O_Tnode) return O_Cnode is
+   begin
+      Cnodes.Append (Cnode_Common'(Kind => OC_Null,
+                                   Lit_Type => Ltype));
+      return Cnodes.Last;
+   end New_Null_Access;
+
+   function To_Cnode_Common is new Ada.Unchecked_Conversion
+     (Source => Cnode_Addr, Target => Cnode_Common);
+
+   function To_Cnode_Addr is new Ada.Unchecked_Conversion
+     (Source => Cnode_Common, Target => Cnode_Addr);
+
+   function New_Global_Unchecked_Address (Decl : O_Dnode; Atype : O_Tnode)
+                                         return O_Cnode
+   is
+      Res : O_Cnode;
+   begin
+      Cnodes.Append (Cnode_Common'(Kind => OC_Address,
+                                   Lit_Type => Atype));
+      Res := Cnodes.Last;
+      Cnodes.Append (To_Cnode_Common (Cnode_Addr'(Decl => Decl,
+                                                  Pad => 0)));
+      return Res;
+   end New_Global_Unchecked_Address;
+
+   function New_Global_Address (Decl : O_Dnode; Atype : O_Tnode)
+                               return O_Cnode
+   is
+      Res : O_Cnode;
+   begin
+      Cnodes.Append (Cnode_Common'(Kind => OC_Address,
+                                   Lit_Type => Atype));
+      Res := Cnodes.Last;
+      Cnodes.Append (To_Cnode_Common (Cnode_Addr'(Decl => Decl,
+                                                  Pad => 0)));
+      return Res;
+   end New_Global_Address;
+
+   function New_Subprogram_Address (Subprg : O_Dnode; Atype : O_Tnode)
+                                   return O_Cnode
+   is
+      Res : O_Cnode;
+   begin
+      Cnodes.Append (Cnode_Common'(Kind => OC_Subprg_Address,
+                                   Lit_Type => Atype));
+      Res := Cnodes.Last;
+      Cnodes.Append (To_Cnode_Common (Cnode_Addr'(Decl => Subprg,
+                                                  Pad => 0)));
+      return Res;
+   end New_Subprogram_Address;
+
+   function Get_Const_Decl (Cst : O_Cnode) return O_Dnode is
+   begin
+      return To_Cnode_Addr (Cnodes.Table (Cst + 1)).Decl;
+   end Get_Const_Decl;
+
+   function To_Cnode_Common is new Ada.Unchecked_Conversion
+     (Source => Cnode_Enum, Target => Cnode_Common);
+
+   function To_Cnode_Enum is new Ada.Unchecked_Conversion
+     (Source => Cnode_Common, Target => Cnode_Enum);
+
+   --function Get_Named_Literal_Id (Lit : O_Cnode) return O_Ident is
+   --begin
+   --   return To_Cnode_Enum (Cnodes.Table (Lit + 1)).Id;
+   --end Get_Named_Literal_Id;
+
+   function New_Named_Literal
+     (Atype : O_Tnode; Id : O_Ident; Val : Uns32; Prev : O_Cnode)
+     return O_Cnode
+   is
+      Res : O_Cnode;
+   begin
+      Cnodes.Append (Cnode_Common'(Kind => OC_Lit,
+                                   Lit_Type => Atype));
+      Res := Cnodes.Last;
+      Cnodes.Append (To_Cnode_Common (Cnode_Enum'(Id => Id,
+                                                  Val => Val)));
+      if Prev /= O_Cnode_Null then
+         if Prev + 2 /= Res then
+            raise Syntax_Error;
+         end if;
+      end if;
+      return Res;
+   end New_Named_Literal;
+
+   function Get_Lit_Ident (L : O_Cnode) return O_Ident is
+   begin
+      return To_Cnode_Enum (Cnodes.Table (L + 1)).Id;
+   end Get_Lit_Ident;
+
+   function Get_Lit_Value (L : O_Cnode) return Uns32 is
+   begin
+      return To_Cnode_Enum (Cnodes.Table (L + 1)).Val;
+   end Get_Lit_Value;
+
+   function Get_Lit_Chain (L : O_Cnode) return O_Cnode is
+   begin
+      return L + 2;
+   end Get_Lit_Chain;
+
+   package Els is new GNAT.Table
+     (Table_Component_Type => O_Cnode,
+      Table_Index_Type => Int32,
+      Table_Low_Bound => 2,
+      Table_Initial => 128,
+      Table_Increment => 100);
+
+   function To_Cnode_Common is new Ada.Unchecked_Conversion
+     (Source => Cnode_Aggr, Target => Cnode_Common);
+
+   function To_Cnode_Aggr is new Ada.Unchecked_Conversion
+     (Source => Cnode_Common, Target => Cnode_Aggr);
+
+
+   procedure Start_Record_Aggr (List : out O_Record_Aggr_List;
+                                Atype : O_Tnode)
+   is
+      Val : Int32;
+      Num : Uns32;
+   begin
+      Num := Get_Type_Record_Nbr_Fields (Atype);
+      Val := Els.Allocate (Integer (Num));
+
+      Cnodes.Append (Cnode_Common'(Kind => OC_Record,
+                                   Lit_Type => Atype));
+      List := (Res => Cnodes.Last,
+               Rec_Field => Get_Type_Record_Fields (Atype),
+               El => Val);
+      Cnodes.Append (To_Cnode_Common (Cnode_Aggr'(Els => Val,
+                                                  Nbr => Int32 (Num))));
+   end Start_Record_Aggr;
+
+
+   procedure New_Record_Aggr_El (List : in out O_Record_Aggr_List;
+                                 Value : O_Cnode)
+   is
+   begin
+      Els.Table (List.El) := Value;
+      List.El := List.El + 1;
+   end New_Record_Aggr_El;
+
+   procedure Finish_Record_Aggr (List : in out O_Record_Aggr_List;
+                                 Res : out O_Cnode) is
+   begin
+      Res := List.Res;
+   end Finish_Record_Aggr;
+
+
+   procedure Start_Array_Aggr (List : out O_Array_Aggr_List; Atype : O_Tnode)
+   is
+      Val : Int32;
+      Num : Uns32;
+   begin
+      Num := Get_Type_Subarray_Length (Atype);
+      Val := Els.Allocate (Integer (Num));
+
+      Cnodes.Append (Cnode_Common'(Kind => OC_Array,
+                                   Lit_Type => Atype));
+      List := (Res => Cnodes.Last,
+               El => Val);
+      Cnodes.Append (To_Cnode_Common (Cnode_Aggr'(Els => Val,
+                                                  Nbr => Int32 (Num))));
+   end Start_Array_Aggr;
+
+   procedure New_Array_Aggr_El (List : in out O_Array_Aggr_List;
+                                Value : O_Cnode)
+   is
+   begin
+      Els.Table (List.El) := Value;
+      List.El := List.El + 1;
+   end New_Array_Aggr_El;
+
+   procedure Finish_Array_Aggr (List : in out O_Array_Aggr_List;
+                                Res : out O_Cnode)
+   is
+   begin
+      Res := List.Res;
+   end Finish_Array_Aggr;
+
+   function Get_Const_Aggr_Length (Cst : O_Cnode) return Int32 is
+   begin
+      return To_Cnode_Aggr (Cnodes.Table (Cst + 1)).Nbr;
+   end Get_Const_Aggr_Length;
+
+   function Get_Const_Aggr_Element (Cst : O_Cnode; N : Int32) return O_Cnode
+   is
+      El : Int32;
+   begin
+      El := To_Cnode_Aggr (Cnodes.Table (Cst + 1)).Els;
+      return Els.Table (El + N);
+   end Get_Const_Aggr_Element;
+
+   function New_Union_Aggr (Atype : O_Tnode; Field : O_Fnode; Value : O_Cnode)
+                           return O_Cnode
+   is
+      pragma Unreferenced (Atype);
+      pragma Unreferenced (Field);
+   begin
+      return Value;
+   end New_Union_Aggr;
+
+   function New_Sizeof (Atype : O_Tnode; Rtype : O_Tnode) return O_Cnode
+   is
+      function To_Cnode_Common is new Ada.Unchecked_Conversion
+        (Source => Cnode_Sizeof, Target => Cnode_Common);
+
+      Res : O_Cnode;
+   begin
+      if Debug.Flag_Debug_Hli then
+         Cnodes.Append (Cnode_Common'(Kind => OC_Sizeof,
+                                      Lit_Type => Rtype));
+         Res := Cnodes.Last;
+         Cnodes.Append (To_Cnode_Common (Cnode_Sizeof'(Atype => Atype,
+                                                       Pad => 0)));
+         return Res;
+      else
+         return New_Unsigned_Literal
+           (Rtype, Unsigned_64 (Get_Type_Size (Atype)));
+      end if;
+   end New_Sizeof;
+
+   function Get_Sizeof_Type (Cst : O_Cnode) return O_Tnode
+   is
+      function To_Cnode_Sizeof is new Ada.Unchecked_Conversion
+        (Cnode_Common, Cnode_Sizeof);
+   begin
+      return To_Cnode_Sizeof (Cnodes.Table (Cst + 1)).Atype;
+   end Get_Sizeof_Type;
+
+   function New_Offsetof (Field : O_Fnode; Rtype : O_Tnode) return O_Cnode is
+   begin
+      return New_Unsigned_Literal
+        (Rtype, Unsigned_64 (Get_Field_Offset (Field)));
+   end New_Offsetof;
+
+   procedure Get_Const_Bytes (Cst : O_Cnode; H, L : out Uns32) is
+   begin
+      case Get_Const_Kind (Cst) is
+         when OC_Signed
+           | OC_Unsigned
+           | OC_Float =>
+            H := Get_Const_High (Cst);
+            L := Get_Const_Low (Cst);
+         when OC_Null =>
+            H := 0;
+            L := 0;
+         when OC_Lit =>
+            H := 0;
+            L := To_Cnode_Enum (Cnodes.Table (Cst + 1)).Val;
+         when OC_Array
+           | OC_Record
+           | OC_Sizeof
+           | OC_Address
+           | OC_Subprg_Address =>
+            raise Syntax_Error;
+      end case;
+   end Get_Const_Bytes;
+
+   procedure Mark (M : out Mark_Type) is
+   begin
+      M.Cnode := Cnodes.Last;
+      M.Els := Els.Last;
+   end Mark;
+
+   procedure Release (M : Mark_Type) is
+   begin
+      Cnodes.Set_Last (M.Cnode);
+      Els.Set_Last (M.Els);
+   end Release;
+
+   procedure Disp_Stats
+   is
+      use Ada.Text_IO;
+   begin
+      Put_Line ("Number of Cnodes: " & O_Cnode'Image (Cnodes.Last));
+      Put_Line ("Number of Cnodes-Els: " & Int32'Image (Els.Last));
+   end Disp_Stats;
+
+   procedure Finish is
+   begin
+      Cnodes.Free;
+      Els.Free;
+   end Finish;
+end Ortho_Code.Consts;