diff --git a/compiler/i386/optbase.pas b/compiler/i386/optbase.pas
new file mode 100644
index 0000000000..7dffce7884
--- /dev/null
+++ b/compiler/i386/optbase.pas
@@ -0,0 +1,85 @@
+{
+    $Id$
+    Copyright (c) 1998-2002 by the Free Pascal development team
+    
+    This routine contains the basic tables and information
+    for the generic optimizers and cpu specific optimizations.
+
+    This program 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 of the License, or
+    (at your option) any later version.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ ****************************************************************************
+}
+{# This unit should define cpu specific information which is required
+   for the optimizers.
+}   
+unit optbase;
+
+interface
+
+uses cpuinfo, cpubase;
+
+
+{*****************************************************************************
+                   Opcode propeties (needed for optimizer)
+*****************************************************************************}
+
+{$ifndef NOOPT}
+Type
+{What an instruction can change}
+  TInsChange = (Ch_None,
+     {Read from a register}
+     Ch_REAX, Ch_RECX, Ch_REDX, Ch_REBX, Ch_RESP, Ch_REBP, Ch_RESI, Ch_REDI,
+     {write from a register}
+     Ch_WEAX, Ch_WECX, Ch_WEDX, Ch_WEBX, Ch_WESP, Ch_WEBP, Ch_WESI, Ch_WEDI,
+     {read and write from/to a register}
+     Ch_RWEAX, Ch_RWECX, Ch_RWEDX, Ch_RWEBX, Ch_RWESP, Ch_RWEBP, Ch_RWESI, Ch_RWEDI,
+     {modify the contents of a register with the purpose of using
+      this changed content afterwards (add/sub/..., but e.g. not rep
+      or movsd)}
+     Ch_MEAX, Ch_MECX, Ch_MEDX, Ch_MEBX, Ch_MESP, Ch_MEBP, Ch_MESI, Ch_MEDI,
+     Ch_CDirFlag {clear direction flag}, Ch_SDirFlag {set dir flag},
+     Ch_RFlags, Ch_WFlags, Ch_RWFlags, Ch_FPU,
+     Ch_Rop1, Ch_Wop1, Ch_RWop1,Ch_Mop1,
+     Ch_Rop2, Ch_Wop2, Ch_RWop2,Ch_Mop2,
+     Ch_Rop3, Ch_WOp3, Ch_RWOp3,Ch_Mop3,
+     Ch_WMemEDI,
+     Ch_All
+  );
+
+
+const
+  MaxCh = 3; { Max things a instruction can change }
+type
+  TInsProp = packed record
+    Ch : Array[1..MaxCh] of TInsChange;
+  end;
+
+const
+  InsProp : array[tasmop] of TInsProp =
+{$i i386prop.inc}
+
+{$endif NOOPT}
+
+implementation
+
+
+end.
+
+{
+  $Log$
+  Revision 1.1  2002-04-20 21:50:14  carl
+  + optimization cpu specific information base file
+
+}