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diff --git a/src/ortho/mcode/ortho_code-x86.adb b/src/ortho/mcode/ortho_code-x86.adb
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+++ b/src/ortho/mcode/ortho_code-x86.adb
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+--  Mcode back-end for ortho - X86 common definitions.
+--  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.
+package body Ortho_Code.X86 is
+   function Inverse_Cc (R : O_Reg) return O_Reg is
+   begin
+      case R is
+         when R_Ult =>
+            return R_Uge;
+         when R_Uge =>
+            return R_Ult;
+         when R_Eq =>
+            return R_Ne;
+         when R_Ne =>
+            return R_Eq;
+         when R_Ule =>
+            return R_Ugt;
+         when R_Ugt =>
+            return R_Ule;
+         when R_Slt =>
+            return R_Sge;
+         when R_Sge =>
+            return R_Slt;
+         when R_Sle =>
+            return R_Sgt;
+         when R_Sgt =>
+            return R_Sle;
+         when others =>
+            raise Program_Error;
+      end case;
+   end Inverse_Cc;
+
+   function Get_R64_High (Reg : Regs_R64) return Regs_R32 is
+   begin
+      case Reg is
+         when R_Edx_Eax =>
+            return R_Dx;
+         when R_Ebx_Ecx =>
+            return R_Bx;
+         when R_Esi_Edi =>
+            return R_Si;
+      end case;
+   end Get_R64_High;
+
+   function Get_R64_Low (Reg : Regs_R64) return Regs_R32 is
+   begin
+      case Reg is
+         when R_Edx_Eax =>
+            return R_Ax;
+         when R_Ebx_Ecx =>
+            return R_Cx;
+         when R_Esi_Edi =>
+            return R_Di;
+      end case;
+   end Get_R64_Low;
+
+   function Ekind_Unsigned_To_Cc (Kind : OE_Kind_Cmp) return O_Reg is
+   begin
+      case Kind is
+         when OE_Eq =>
+            return R_Eq;
+         when OE_Neq =>
+            return R_Ne;
+         when OE_Lt =>
+            return R_Ult;
+         when OE_Le =>
+            return R_Ule;
+         when OE_Gt =>
+            return R_Ugt;
+         when OE_Ge =>
+            return R_Uge;
+      end case;
+   end Ekind_Unsigned_To_Cc;
+
+   function Ekind_Signed_To_Cc (Kind : OE_Kind_Cmp) return O_Reg is
+   begin
+      case Kind is
+         when OE_Eq =>
+            return R_Eq;
+         when OE_Neq =>
+            return R_Ne;
+         when OE_Lt =>
+            return R_Slt;
+         when OE_Le =>
+            return R_Sle;
+         when OE_Gt =>
+            return R_Sgt;
+         when OE_Ge =>
+            return R_Sge;
+      end case;
+   end Ekind_Signed_To_Cc;
+
+end Ortho_Code.X86;
+
+