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{
$Id: rgcpu.pas,v 1.17 2005/02/14 17:13:09 peter Exp $
Copyright (c) 1998-2003 by Florian Klaempfl
This unit implements the arm specific class for the register
allocator
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;
{$i fpcdefs.inc}
interface
uses
aasmbase,aasmtai,aasmcpu,
cgbase,cgutils,
cpubase,
rgobj;
type
trgcpu = class(trgobj)
procedure do_spill_read(list:Taasmoutput;pos:tai;const spilltemp:treference;tempreg:tregister);override;
procedure do_spill_written(list:Taasmoutput;pos:tai;const spilltemp:treference;tempreg:tregister);override;
end;
trgintcpu = class(trgcpu)
procedure add_cpu_interferences(p : tai);override;
end;
implementation
uses
verbose, cutils,
cgobj,
procinfo;
procedure trgcpu.do_spill_read(list:Taasmoutput;pos:tai;const spilltemp:treference;tempreg:tregister);
var
helpins: tai;
tmpref : treference;
helplist : taasmoutput;
l : tasmlabel;
hreg : tregister;
begin
if abs(spilltemp.offset)>4095 then
begin
helplist:=taasmoutput.create;
reference_reset(tmpref);
{ create consts entry }
objectlibrary.getlabel(l);
cg.a_label(current_procinfo.aktlocaldata,l);
tmpref.symboldata:=current_procinfo.aktlocaldata.last;
current_procinfo.aktlocaldata.concat(tai_const.Create_32bit(spilltemp.offset));
{ load consts entry }
if getregtype(tempreg)=R_INTREGISTER then
hreg:=getregisterinline(helplist,R_SUBWHOLE)
else
hreg:=cg.getintregister(helplist,OS_ADDR);
tmpref.symbol:=l;
tmpref.base:=NR_R15;
helplist.concat(taicpu.op_reg_ref(A_LDR,hreg,tmpref));
reference_reset_base(tmpref,hreg,0);
if spilltemp.index<>NR_NO then
internalerror(200401263);
helpins:=spilling_create_load(tmpref,tempreg);
helplist.concat(helpins);
if pos=nil then
list.insertlistafter(list.first,helplist)
else
list.insertlistafter(pos.next,helplist);
helplist.free;
end
else
inherited do_spill_read(list,pos,spilltemp,tempreg);
end;
procedure trgcpu.do_spill_written(list:Taasmoutput;pos:tai;const spilltemp:treference;tempreg:tregister);
var
helpins: tai;
tmpref : treference;
helplist : taasmoutput;
l : tasmlabel;
hreg : tregister;
begin
if abs(spilltemp.offset)>4095 then
begin
helplist:=taasmoutput.create;
reference_reset(tmpref);
{ create consts entry }
objectlibrary.getlabel(l);
cg.a_label(current_procinfo.aktlocaldata,l);
tmpref.symboldata:=current_procinfo.aktlocaldata.last;
current_procinfo.aktlocaldata.concat(tai_const.Create_32bit(spilltemp.offset));
{ load consts entry }
if getregtype(tempreg)=R_INTREGISTER then
hreg:=getregisterinline(helplist,R_SUBWHOLE)
else
hreg:=cg.getintregister(helplist,OS_ADDR);
tmpref.symbol:=l;
tmpref.base:=NR_R15;
helplist.concat(taicpu.op_reg_ref(A_LDR,hreg,tmpref));
if spilltemp.index<>NR_NO then
internalerror(200401263);
reference_reset_base(tmpref,hreg,0);
helplist.concat(spilling_create_store(tempreg,tmpref));
if getregtype(tempreg)=R_INTREGISTER then
ungetregisterinline(helplist,hreg);
list.insertlistafter(pos,helplist)
end
else
inherited do_spill_written(list,pos,spilltemp,tempreg);
end;
procedure trgintcpu.add_cpu_interferences(p : tai);
begin
if p.typ=ait_instruction then
begin
case taicpu(p).opcode of
A_MUL:
add_edge(getsupreg(taicpu(p).oper[0]^.reg),getsupreg(taicpu(p).oper[1]^.reg));
A_UMULL,
A_UMLAL,
A_SMULL,
A_SMLAL:
begin
add_edge(getsupreg(taicpu(p).oper[0]^.reg),getsupreg(taicpu(p).oper[1]^.reg));
add_edge(getsupreg(taicpu(p).oper[1]^.reg),getsupreg(taicpu(p).oper[2]^.reg));
add_edge(getsupreg(taicpu(p).oper[0]^.reg),getsupreg(taicpu(p).oper[2]^.reg));
end;
end;
end;
end;
end.
{
$Log: rgcpu.pas,v $
Revision 1.17 2005/02/14 17:13:09 peter
* truncate log
Revision 1.16 2005/02/13 18:55:19 florian
+ overflow checking for the arm
}
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