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133 lines
4.1 KiB
ObjectPascal
133 lines
4.1 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Florian Klaempfl
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This unit implements the Xtensa 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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unit rgcpu;
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{$i fpcdefs.inc}
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interface
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uses
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aasmbase,aasmcpu,aasmtai,aasmdata,
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cgbase,cgutils,
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cpubase,
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globtype,
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rgobj;
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type
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trgcpu=class(trgobj)
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procedure do_spill_read(list: TAsmList; pos: tai; const spilltemp: treference; tempreg: tregister; orgsupreg: tsuperregister); override;
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procedure do_spill_written(list: TAsmList; pos: tai; const spilltemp: treference; tempreg: tregister; orgsupreg: tsuperregister); override;
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protected
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procedure do_spill_op(list: tasmlist; op: tasmop; pos: tai; const spilltemp: treference; tempreg: tregister; orgsupreg: tsuperregister);
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end;
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trgintcpu=class(trgcpu)
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end;
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implementation
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uses
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verbose,cutils,
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cgobj;
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procedure trgcpu.do_spill_read(list: TAsmList; pos: tai; const spilltemp: treference; tempreg: tregister; orgsupreg: tsuperregister);
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var
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op: TAsmOp;
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begin
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case getregtype(tempreg) of
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R_FPUREGISTER:
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op:=A_LSI;
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R_INTREGISTER:
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op:=A_L32I;
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else
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Internalerror(2020041001);
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end;
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do_spill_op(list,op,pos,spilltemp,tempreg,orgsupreg);
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end;
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procedure trgcpu.do_spill_written(list: TAsmList; pos: tai; const spilltemp: treference; tempreg: tregister; orgsupreg: tsuperregister);
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var
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op: TAsmOp;
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begin
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case getregtype(tempreg) of
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R_FPUREGISTER:
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op:=A_SSI;
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R_INTREGISTER:
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op:=A_S32I;
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else
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Internalerror(2020041002);
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end;
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do_spill_op(list,op,pos,spilltemp,tempreg,orgsupreg);
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end;
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procedure trgcpu.do_spill_op(list: tasmlist; op: tasmop; pos: tai; const spilltemp: treference; tempreg: tregister; orgsupreg: tsuperregister);
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var
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helpins : tai;
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tmpref : treference;
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helplist : TAsmList;
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hreg : tregister;
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isload : boolean;
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begin
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isload:=op in [A_L32I,A_LSI];
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if abs(spilltemp.offset)>1020 then
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begin
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helplist:=TAsmList.create;
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if getregtype(tempreg)=R_INTREGISTER then
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begin
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if isload then
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hreg:=tempreg
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else
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hreg:=getregisterinline(helplist,[R_SUBWHOLE]);
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end
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else
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hreg:=cg.getintregister(helplist,OS_ADDR);
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if spilltemp.index<>NR_NO then
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Internalerror(2020032401);
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helplist.concat(taicpu.op_reg_reg_const(A_ADDMI,hreg,spilltemp.base,(spilltemp.offset div 256)*256));
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reference_reset(tmpref,sizeof(pint),[]);
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tmpref.base:=hreg;
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tmpref.offset:=spilltemp.offset mod 256;
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helpins:=taicpu.op_reg_ref(op,tempreg,tmpref);
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helplist.concat(helpins);
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if (getregtype(tempreg)=R_INTREGISTER) and not(isload) then
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ungetregisterinline(helplist,hreg);
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list.insertlistafter(pos,helplist);
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helplist.free;
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end
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else if isload then
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inherited do_spill_read(list,pos,spilltemp,tempreg,orgsupreg)
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else
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inherited do_spill_written(list,pos,spilltemp,tempreg,orgsupreg);
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end;
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end.
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