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https://gitlab.com/freepascal.org/fpc/source.git
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262 lines
8.7 KiB
ObjectPascal
262 lines
8.7 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2003 by Florian Klaempfl
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This unit implements the arm 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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cgbase,
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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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procedure add_cpu_interferences(p : tai);override;
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procedure do_spill_read(list : taasmoutput;instr : taicpu_abstract;pos: tai; regidx: word;
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const spilltemplist:Tspill_temp_list;const regs : tspillregsinfo);override;
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procedure do_spill_written(list : taasmoutput;instr : taicpu_abstract;pos: tai; regidx: word;
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const spilltemplist:Tspill_temp_list;const regs : tspillregsinfo);override;
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procedure do_spill_readwritten(list : taasmoutput;instr : taicpu_abstract;pos: tai; regidx: word;
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const spilltemplist:Tspill_temp_list;const regs : tspillregsinfo);override;
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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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cgutils,cgobj,
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procinfo,
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aasmcpu;
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procedure trgcpu.add_cpu_interferences(p : tai);
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begin
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if p.typ=ait_instruction then
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begin
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if (taicpu(p).opcode=A_MUL) then
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add_edge(getsupreg(taicpu(p).oper[0]^.reg),getsupreg(taicpu(p).oper[1]^.reg));
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end;
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end;
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procedure trgcpu.do_spill_read(list : taasmoutput;instr : taicpu_abstract;pos: tai; regidx: word;
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const spilltemplist:Tspill_temp_list;const regs : tspillregsinfo);
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var
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helpins: tai;
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tmpref,ref : treference;
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helplist : taasmoutput;
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l : tasmlabel;
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tmpreg : tregister;
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begin
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ref:=spilltemplist[regs[regidx].orgreg];
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if abs(ref.offset)>4095 then
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begin
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helplist:=taasmoutput.create;
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reference_reset(tmpref);
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{ create consts entry }
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objectlibrary.getlabel(l);
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cg.a_label(current_procinfo.aktlocaldata,l);
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tmpref.symboldata:=current_procinfo.aktlocaldata.last;
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current_procinfo.aktlocaldata.concat(tai_const.Create_32bit(ref.offset));
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{ load consts entry }
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getregisterinline(helplist,nil,defaultsub,tmpreg);
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tmpref.symbol:=l;
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tmpref.base:=NR_R15;
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helplist.concat(taicpu.op_reg_ref(A_LDR,tmpreg,tmpref));
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if ref.index<>NR_NO then
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internalerror(200401263);
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ref.index:=tmpreg;
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ref.offset:=0;
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helpins:=taicpu.op_reg_ref(A_LDR,regs[regidx].tempreg,ref);
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helplist.concat(helpins);
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if pos=nil then
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list.insertlistafter(list.first,helplist)
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else
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list.insertlistafter(pos.next,helplist);
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ungetregisterinline(helplist,tai(helplist.last),regs[regidx].tempreg);
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ungetregisterinline(list,instr,regs[regidx].tempreg);
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forward_allocation(tai(helpins.next),instr);
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helplist.free;
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end
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else
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begin
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helpins:=taicpu.op_reg_ref(A_LDR,regs[regidx].tempreg,ref);
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if pos=nil then
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list.insertafter(helpins,list.first)
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else
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list.insertafter(helpins,pos.next);
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ungetregisterinline(list,instr,regs[regidx].tempreg);
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forward_allocation(tai(helpins.next),instr);
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end;
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end;
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procedure trgcpu.do_spill_written(list : taasmoutput;instr : taicpu_abstract;pos: tai; regidx: word;
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const spilltemplist:Tspill_temp_list;const regs : tspillregsinfo);
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var
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helpins: tai;
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ref,tmpref : treference;
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helplist : taasmoutput;
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l : tasmlabel;
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tmpreg : tregister;
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begin
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ref:=spilltemplist[regs[regidx].orgreg];
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if abs(ref.offset)>4095 then
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begin
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helplist:=taasmoutput.create;
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reference_reset(tmpref);
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{ create consts entry }
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objectlibrary.getlabel(l);
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cg.a_label(current_procinfo.aktlocaldata,l);
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tmpref.symboldata:=current_procinfo.aktlocaldata.last;
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current_procinfo.aktlocaldata.concat(tai_const.Create_32bit(ref.offset));
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{ load consts entry }
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getregisterinline(helplist,nil,defaultsub,tmpreg);
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tmpref.symbol:=l;
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tmpref.base:=NR_R15;
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helplist.concat(taicpu.op_reg_ref(A_LDR,tmpreg,tmpref));
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if ref.index<>NR_NO then
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internalerror(200401263);
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ref.index:=tmpreg;
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ref.offset:=0;
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helplist.concat(taicpu.op_reg_ref(A_STR,regs[regidx].tempreg,ref));
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ungetregisterinline(helplist,tai(helplist.last),regs[regidx].tempreg);
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ungetregisterinline(helplist,tai(helplist.last),tmpreg);
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list.insertlistafter(instr,helplist);
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helplist.free;
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end
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else
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begin
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helpins:=taicpu.op_reg_ref(A_STR,regs[regidx].tempreg,ref);
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list.insertafter(helpins,instr);
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ungetregisterinline(list,helpins,regs[regidx].tempreg);
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end;
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end;
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procedure trgcpu.do_spill_readwritten(list : taasmoutput;instr : taicpu_abstract;pos: tai; regidx: word;
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const spilltemplist:Tspill_temp_list;const regs : tspillregsinfo);
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var
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helpins1, helpins2: tai;
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tmpref,ref : treference;
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tmpreg : tregister;
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begin
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ref:=spilltemplist[regs[regidx].orgreg];
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internalerror(200403141);
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{
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if abs(ref.offset)>4095 then
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begin
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reference_reset(tmpref);
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{ create consts entry }
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objectlibrary.getlabel(l);
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cg.a_label(current_procinfo.aktlocaldata,l);
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tmpref.symboldata:=current_procinfo.aktlocaldata.last;
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current_procinfo.aktlocaldata.concat(tai_const.Create_32bit(ref.offset));
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{ load consts entry }
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getregisterinline(list,pos,defaultsub,tmpreg);
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tmpref.symbol:=l;
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tmpref.base:=NR_R15;
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list.concat(taicpu.op_reg_ref(A_LDR,tmpreg,tmpref));
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if ref.index<>NR_NO then
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internalerror(200401263);
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ref.index:=tmpreg;
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ref.offset:=0;
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end;
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}
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helpins1:=taicpu.op_reg_ref(A_LDR,regs[regidx].tempreg,ref);
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if pos=nil then
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list.insertafter(helpins1,list.first)
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else
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list.insertafter(helpins1,pos.next);
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ref:=spilltemplist[regs[regidx].orgreg];
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ref.symboldata:=nil;
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helpins2:=taicpu.op_reg_ref(A_STR,regs[regidx].tempreg,ref);
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list.insertafter(helpins2,instr);
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ungetregisterinline(list,helpins2,regs[regidx].tempreg);
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forward_allocation(tai(helpins1.next),instr);
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end;
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end.
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{
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$Log$
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Revision 1.10 2004-03-14 16:15:40 florian
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* spilling problem fixed
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* handling of floating point memory references fixed
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Revision 1.9 2004/03/06 20:35:20 florian
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* fixed arm compilation
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* cleaned up code generation for exported linux procedures
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Revision 1.8 2004/02/08 23:06:59 florian
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* fixed compilation problem
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Revision 1.7 2004/01/28 15:36:47 florian
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* fixed another couple of arm bugs
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Revision 1.6 2004/01/26 19:05:56 florian
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* fixed several arm issues
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Revision 1.5 2003/11/02 14:30:03 florian
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* fixed ARM for new reg. allocation scheme
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Revision 1.4 2003/09/11 11:55:00 florian
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* improved arm code generation
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* move some protected and private field around
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* the temp. register for register parameters/arguments are now released
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before the move to the parameter register is done. This improves
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the code in a lot of cases.
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Revision 1.3 2003/09/04 00:15:29 florian
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* first bunch of adaptions of arm compiler for new register type
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Revision 1.2 2003/08/25 23:20:38 florian
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+ started to implement FPU support for the ARM
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* fixed a lot of other things
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Revision 1.1 2003/08/16 13:23:01 florian
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* several arm related stuff fixed
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}
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