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Diffstat (limited to 'compiler/arm/rgcpu.pas')
| -rw-r--r-- | compiler/arm/rgcpu.pas | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/compiler/arm/rgcpu.pas b/compiler/arm/rgcpu.pas new file mode 100644 index 0000000000..a522a4f38c --- /dev/null +++ b/compiler/arm/rgcpu.pas @@ -0,0 +1,168 @@ +{ + 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.getjumplabel(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.getjumplabel(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. |