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25059e21b6
+ Scratch registers unavailable when new register allocator used + maybe_save/maybe_restore unavailable when new register allocator used
103 lines
2.9 KiB
ObjectPascal
103 lines
2.9 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2002 by Florian Klaempfl
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This unit implements the powerpc specific class for the register
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allocator
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit rgcpu;
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{$i fpcdefs.inc}
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interface
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uses
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aasmbase,aasmtai,
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cpubase,
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rgobj;
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type
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trgcpu = class(trgobj)
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function getexplicitregisterint(list: taasmoutput; reg: Tnewregister): tregister; override;
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procedure ungetregisterint(list: taasmoutput; reg: tregister); override;
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end;
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implementation
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uses
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cgobj;
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function trgcpu.getexplicitregisterint(list: taasmoutput; reg: Tnewregister): tregister;
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var r:Tregister;
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begin
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if reg = NR_R0 then
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begin
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r.enum:=R_INTREGISTER;
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r.number:=NR_R0;
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cg.a_reg_alloc(list,r);
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result := r;
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end
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else result := inherited getexplicitregisterint(list,reg);
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end;
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procedure trgcpu.ungetregisterint(list: taasmoutput; reg: tregister);
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begin
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if reg.enum = R_0 then
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cg.a_reg_dealloc(list,reg)
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else
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inherited ungetregisterint(list,reg);
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end;
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initialization
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rg := trgcpu.create(32); {PPC has 32 registers.}
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end.
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{
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$Log$
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Revision 1.6 2003-04-22 10:09:35 daniel
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+ Implemented the actual register allocator
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+ Scratch registers unavailable when new register allocator used
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+ maybe_save/maybe_restore unavailable when new register allocator used
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Revision 1.5 2003/02/19 22:00:16 daniel
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* Code generator converted to new register notation
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- Horribily outdated todo.txt removed
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Revision 1.4 2003/01/08 18:43:58 daniel
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* Tregister changed into a record
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Revision 1.3 2002/07/07 09:44:32 florian
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* powerpc target fixed, very simple units can be compiled
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Revision 1.2 2002/05/16 19:46:53 carl
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+ defines.inc -> fpcdefs.inc to avoid conflicts if compiling by hand
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+ try to fix temp allocation (still in ifdef)
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+ generic constructor calls
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+ start of tassembler / tmodulebase class cleanup
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Revision 1.1 2002/04/06 18:13:02 jonas
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* several powerpc-related additions and fixes
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}
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