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- {******************************************************************************
- $Id$
- Copyright (c) 1998-2002 by Florian Klaempfl
- 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 rgcpu;
- { This unit implements the processor specific class for the register allocator}
- {$INCLUDE fpcdefs.inc}
- interface
- uses
- cpubase,
- cpuinfo,
- aasmcpu,
- aasmtai,
- cclasses,globtype,cgbase,aasmbase,rgobj;
- type
- {This class implements the cpu spaecific register allocator. It is used by the
- code generator to allocate and free registers which might be valid across
- nodes. It also contains utility routines related to registers. Some of the
- methods in this class overrides generic implementations in rgobj.pas.}
- trgcpu=class(trgobj)
- function GetExplicitRegisterInt(list:taasmoutput;Reg:Tnewregister):tregister;override;
- procedure UngetregisterInt(list:taasmoutput;Reg:tregister);override;
- end;
- implementation
- uses
- cgobj,verbose;
- function trgcpu.GetExplicitRegisterInt(list:taasmoutput;reg:Tnewregister):tregister;
- var r:Tregister;
- begin
- if (reg=RS_O7) or (reg=NR_I7)
- then
- begin
- r.enum:=R_INTREGISTER;
- r.number:=reg;
- cg.a_reg_alloc(list,r);
- result := r;
- end
- else result := inherited GetExplicitRegisterInt(list,reg);
- end;
- procedure trgcpu.UngetregisterInt(list: taasmoutput; reg: tregister);
- begin
- if reg.enum<>R_INTREGISTER then
- internalerror(200302191);
- if (reg.number=RS_O7) or (reg.number=NR_I7)
- then
- cg.a_reg_dealloc(list,reg)
- else
- inherited ungetregisterint(list,reg);
- end;
- begin
- rg := trgcpu.create;
- end.
- {
- $Log$
- Revision 1.6 2003-02-19 22:00:17 daniel
- * Code generator converted to new register notation
- - Horribily outdated todo.txt removed
- Revision 1.5 2003/01/08 18:43:58 daniel
- * Tregister changed into a record
- Revision 1.4 2002/10/13 21:46:07 mazen
- * assembler output format fixed
- Revision 1.3 2002/10/12 19:03:23 mazen
- * Get/Unget expilit registers to be re-examined
- }
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