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127 lines
4.2 KiB
ObjectPascal
127 lines
4.2 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Florian Klaempfl
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This unit implements the Risc-V 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,aasmdata,aasmcpu,
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cgbase,cgutils,
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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 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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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,globtype,
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cgobj,
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procinfo;
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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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tmpref : treference;
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helplist : TAsmList;
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hreg : tregister;
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helpins: Taicpu;
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begin
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if not is_imm12(spilltemp.offset) 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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hreg:=tempreg
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else
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hreg:=cg.getintregister(helplist,OS_ADDR);
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if (spilltemp.offset and $800)<>0 then
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helplist.concat(taicpu.op_reg_const(A_LUI,hreg,((spilltemp.offset shr 12)+1) and $FFFFF))
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else
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helplist.concat(taicpu.op_reg_const(A_LUI,hreg,(spilltemp.offset shr 12) and $FFFFF));
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helplist.concat(taicpu.op_reg_reg_const(A_ADDI,hreg,hreg,SarSmallint(smallint(spilltemp.offset shl 4),4)));
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helplist.concat(taicpu.op_reg_reg_reg(A_ADD,hreg,hreg,spilltemp.base));
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reference_reset_base(tmpref,hreg,0,ctempposinvalid,sizeof(aint),[]);
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helpins:=spilling_create_load(tmpref,tempreg);
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helplist.concat(helpins);
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list.insertlistafter(pos,helplist);
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helplist.free;
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end
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else
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inherited;
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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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tmpref : treference;
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helplist : tasmlist;
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hreg : tregister;
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begin
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if not is_imm12(spilltemp.offset) 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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hreg:=getregisterinline(helplist,[R_SUBWHOLE])
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else
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hreg:=cg.getintregister(helplist,OS_ADDR);
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if (spilltemp.offset and $800)<>0 then
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helplist.concat(taicpu.op_reg_const(A_LUI,hreg,((spilltemp.offset shr 12)+1) and $FFFFF))
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else
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helplist.concat(taicpu.op_reg_const(A_LUI,hreg,(spilltemp.offset shr 12) and $FFFFF));
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helplist.concat(taicpu.op_reg_reg_const(A_ADDI,hreg,hreg,SarSmallint(smallint(spilltemp.offset shl 4),4)));
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helplist.concat(taicpu.op_reg_reg_reg(A_ADD,hreg,hreg,spilltemp.base));
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reference_reset_base(tmpref,hreg,0,ctempposinvalid,sizeof(aint),[]);
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helplist.concat(spilling_create_store(tempreg,tmpref));
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if getregtype(tempreg)=R_INTREGISTER 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
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inherited;
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end;
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end.
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