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diff --git a/compiler/powerpc64/aoptcpub.pas b/compiler/powerpc64/aoptcpub.pas
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+{
+   Copyright (c) 1998-2002 by Jonas Maebe, member of the Free Pascal
+   Development Team
+
+   This unit contains several types and constants necessary for the
+   optimizer to work on the PowerPC64 architecture
+
+   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.
+
+****************************************************************************
+}
+unit aoptcpub; { Assembler OPTimizer CPU specific Base }
+
+{$I fpcdefs.inc}
+
+{ enable the following define if memory references can have both a base and }
+{ index register in 1 operand                                               }
+
+{$DEFINE RefsHaveIndexReg}
+
+{ enable the following define if memory references can have a scaled index }
+
+{ define RefsHaveScale}
+
+{ enable the following define if memory references can have a segment }
+{ override                                                            }
+
+{ define RefsHaveSegment}
+
+interface
+
+uses
+  aasmcpu, AOptBase, cpubase;
+
+type
+
+  { type of a normal instruction }
+  TInstr = Taicpu;
+  PInstr = ^TInstr;
+
+  { ************************************************************************* }
+  { **************************** TCondRegs ********************************** }
+  { ************************************************************************* }
+  { Info about the conditional registers                                      }
+  TCondRegs = object
+    constructor Init;
+    destructor Done;
+  end;
+
+  { ************************************************************************* }
+  { **************************** TAoptBaseCpu ******************************* }
+  { ************************************************************************* }
+
+  TAoptBaseCpu = class(TAoptBase)
+  end;
+
+  { ************************************************************************* }
+  { ******************************* Constants ******************************* }
+  { ************************************************************************* }
+const
+
+  { the maximum number of things (registers, memory, ...) a single instruction }
+  { changes                                                                    }
+
+  MaxCh = 3;
+
+  { the maximum number of operands an instruction has }
+
+  MaxOps = 5;
+
+  {Oper index of operand that contains the source (reference) with a load }
+  {instruction                                                            }
+
+  LoadSrc = 1;
+
+  {Oper index of operand that contains the destination (register) with a load }
+  {instruction                                                                }
+
+  LoadDst = 0;
+
+  {Oper index of operand that contains the source (register) with a store }
+  {instruction                                                            }
+
+  StoreSrc = 0;
+
+  {Oper index of operand that contains the destination (reference) with a load }
+  {instruction                                                                 }
+
+  StoreDst = 1;
+
+  aopt_uncondjmp = A_B;
+  aopt_condjmp = A_BC;
+
+implementation
+
+{ ************************************************************************* }
+{ **************************** TCondRegs ********************************** }
+{ ************************************************************************* }
+
+constructor TCondRegs.init;
+begin
+end;
+
+destructor TCondRegs.Done;
+{$IFDEF inl}inline;
+{$ENDIF inl}
+begin
+end;
+
+end.
+