mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-05-04 00:43:42 +02:00
72 lines
2.3 KiB
ObjectPascal
72 lines
2.3 KiB
ObjectPascal
{******************************************************************************
|
|
$Id$
|
|
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:tregister):tregister;override;
|
|
procedure UngetregisterInt(list:taasmoutput;Reg:tregister);override;
|
|
end;
|
|
implementation
|
|
uses
|
|
cgobj;
|
|
function trgcpu.GetExplicitRegisterInt(list:taasmoutput;reg:tregister):tregister;
|
|
begin
|
|
if reg in [R_O7,R_I7]
|
|
then
|
|
begin
|
|
cg.a_reg_alloc(list,Reg);
|
|
result := Reg;
|
|
end
|
|
else result := inherited GetExplicitRegisterInt(list,reg);
|
|
end;
|
|
procedure trgcpu.UngetregisterInt(list: taasmoutput; reg: tregister);
|
|
begin
|
|
if reg in [R_O7,R_I7]
|
|
then
|
|
cg.a_reg_dealloc(list,reg)
|
|
else
|
|
inherited ungetregisterint(list,reg);
|
|
end;
|
|
initialization
|
|
rg := trgcpu.create;
|
|
end.
|
|
{
|
|
$Log$
|
|
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
|
|
|
|
}
|