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305 lines
10 KiB
ObjectPascal
305 lines
10 KiB
ObjectPascal
{******************************************************************************
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$Id$
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Copyright (c) 2002 by Florian Klaempfl
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PowerPC specific calling conventions
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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 cpupara;
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{SPARC specific calling conventions are handled by this unit}
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{$INCLUDE fpcdefs.inc}
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interface
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uses
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cpubase,
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symconst,symbase,symtype,symdef,paramgr;
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type
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TSparcParaManager=class(TParaManager)
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function GetIntParaLoc(nr:longint):TParaLocation;override;
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procedure create_param_loc_info(p:TAbstractProcDef);override;
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function GetFuncRetParaLoc(p:TAbstractProcDef):TParaLocation;override;
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end;
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implementation
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uses
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verbose,
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globtype,
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cpuinfo,cginfo,cgbase,
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defbase;
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function TSparcParaManager.GetIntParaLoc(nr:longint):TParaLocation;
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begin
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if nr<1
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then
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InternalError(2002100806);
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FillChar(GetIntParaLoc,SizeOf(TParaLocation),0);
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Dec(nr);
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with GetIntParaLoc do
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if nr<6
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then{The six first parameters are passed into registers}
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begin
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loc:=LOC_REGISTER;
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register:=TRegister(LongInt(R_i0)+nr);
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end
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else{The other parameters are passed into the frame}
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begin
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loc:=LOC_REFERENCE;
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reference.index:=frame_pointer_reg;
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reference.offset:=-68-nr*4;
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end;
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end;
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function GetParaLoc(p:TDef):TLoc;
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begin
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{Later, the LOC_REFERENCE is in most cases changed into LOC_REGISTER if
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push_addr_param for the def is true}
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case p.DefType of
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OrdDef:
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GetParaLoc:=LOC_REGISTER;
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FloatDef:
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GetParaLoc:=LOC_FPUREGISTER;
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enumdef:
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getparaloc:=LOC_REGISTER;
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pointerdef:
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getparaloc:=LOC_REGISTER;
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formaldef:
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getparaloc:=LOC_REGISTER;
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classrefdef:
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getparaloc:=LOC_REGISTER;
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recorddef:
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getparaloc:=LOC_REFERENCE;
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objectdef:
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if is_object(p)
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then
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getparaloc:=LOC_REFERENCE
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else
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getparaloc:=LOC_REGISTER;
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stringdef:
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if is_shortstring(p) or is_longstring(p)
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then
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getparaloc:=LOC_REFERENCE
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else
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getparaloc:=LOC_REGISTER;
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procvardef:
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if (po_methodpointer in tprocvardef(p).procoptions)
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then
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getparaloc:=LOC_REFERENCE
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else
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getparaloc:=LOC_REGISTER;
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filedef:
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getparaloc:=LOC_REGISTER;
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arraydef:
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getparaloc:=LOC_REFERENCE;
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setdef:
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if is_smallset(p)
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then
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getparaloc:=LOC_REGISTER
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else
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getparaloc:=LOC_REFERENCE;
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variantdef:
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getparaloc:=LOC_REFERENCE;
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{ avoid problems with errornous definitions }
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errordef:
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getparaloc:=LOC_REGISTER;
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else
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internalerror(2002071001);
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end;
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end;
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procedure TSparcParaManager.create_param_loc_info(p:tabstractprocdef);
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var
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nextintreg,nextfloatreg:tregister;
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stack_offset : aword;
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hp : tparaitem;
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loc : tloc;
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is_64bit: boolean;
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begin
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nextintreg:=R_i0;
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nextfloatreg:=R_F0;
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stack_offset:=92;
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WriteLn('***********************************************');
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hp:=TParaItem(p.para.First);
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while assigned(hp) do
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begin
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loc:=GetParaLoc(hp.paratype.def);
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case loc of
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LOC_REGISTER:
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begin
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hp.paraloc.size:=def_cgSize(hp.paratype.def);
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if hp.paraloc.size=OS_NO
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then
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hp.paraloc.size:=OS_ADDR;
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is_64bit:=hp.paraloc.size in [OS_64,OS_S64];
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if NextIntReg<=TRegister(ord(R_i5)-ord(is_64bit))
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then
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begin
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WriteLn('Allocating ',std_reg2str[NextIntReg]);
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hp.paraloc.loc:=LOC_REGISTER;
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hp.paraloc.registerlow:=NextIntReg;
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inc(NextIntReg);
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if is_64bit
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then
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begin
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hp.paraloc.registerhigh:=nextintreg;
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inc(nextintreg);
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end;
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end
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else
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begin
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nextintreg:=R_i6;
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hp.paraloc.loc:=LOC_REFERENCE;
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hp.paraloc.reference.index:=stack_pointer_reg;
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hp.paraloc.reference.offset:=stack_offset;
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if not is_64bit
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then
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inc(stack_offset,4)
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else
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inc(stack_offset,8);
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end;
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end;
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LOC_FPUREGISTER:
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begin
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if hp.paratyp in [vs_var,vs_out] then
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begin
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if nextintreg<=R_O5 then
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begin
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hp.paraloc.size:=OS_ADDR;
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hp.paraloc.loc:=LOC_REGISTER;
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hp.paraloc.register:=nextintreg;
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inc(nextintreg);
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end
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else
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begin
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{!!!!!!!}
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hp.paraloc.size:=def_cgsize(hp.paratype.def);
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internalerror(2002071006);
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end;
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end
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else if nextfloatreg<=R_F10 then
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begin
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hp.paraloc.size:=def_cgsize(hp.paratype.def);
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hp.paraloc.loc:=LOC_FPUREGISTER;
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hp.paraloc.register:=nextfloatreg;
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inc(nextfloatreg);
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end
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else
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begin
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{!!!!!!!}
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hp.paraloc.size:=def_cgsize(hp.paratype.def);
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internalerror(2002071004);
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end;
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end;
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LOC_REFERENCE:
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begin
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hp.paraloc.size:=OS_ADDR;
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if push_addr_param(hp.paratype.def,p.proccalloption in [pocall_cdecl,pocall_cppdecl]) or (hp.paratyp in [vs_var,vs_out]) then
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begin
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if nextintreg<=R_O5 then
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begin
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hp.paraloc.loc:=LOC_REGISTER;
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hp.paraloc.register:=nextintreg;
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inc(nextintreg);
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end
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else
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begin
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hp.paraloc.loc:=LOC_REFERENCE;
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hp.paraloc.reference.index:=stack_pointer_reg;
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hp.paraloc.reference.offset:=stack_offset;
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inc(stack_offset,4);
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end;
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end
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else
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begin
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hp.paraloc.loc:=LOC_REFERENCE;
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hp.paraloc.reference.index:=stack_pointer_reg;
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hp.paraloc.reference.offset:=stack_offset;
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inc(stack_offset,hp.paratype.def.size);
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end;
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end;
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else
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internalerror(2002071002);
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end;
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hp:=TParaItem(hp.Next);
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end;
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end;
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function tSparcParaManager.GetFuncRetParaLoc(p:TAbstractProcDef):TParaLocation;
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begin
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case p.rettype.def.deftype of
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orddef,enumdef:
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begin
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WriteLn('Allocating i0 as return register');
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GetFuncRetParaLoc.loc:=LOC_REGISTER;
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GetFuncRetParaLoc.register:=R_I0;
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GetFuncRetParaLoc.size:=def_cgsize(p.rettype.def);
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if GetFuncRetParaLoc.size in [OS_S64,OS_64]
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then
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GetFuncRetParaLoc.RegisterHigh:=R_I1;
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end;
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floatdef:
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begin
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GetFuncRetParaLoc.loc:=LOC_FPUREGISTER;
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GetFuncRetParaLoc.register:=R_F1;
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GetFuncRetParaLoc.size:=def_cgsize(p.rettype.def);
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end;
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setdef,
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variantdef,
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pointerdef,
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formaldef,
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classrefdef,
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recorddef,
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objectdef,
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stringdef,
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procvardef,
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filedef,
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arraydef,
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errordef:
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begin
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GetFuncRetParaLoc.loc:=LOC_REGISTER;
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GetFuncRetParaLoc.register:=R_I0;
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GetFuncRetParaLoc.size:=OS_ADDR;
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end;
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else
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internalerror(2002090903);
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end;
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end;
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begin
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ParaManager:=TSparcParaManager.create;
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end.
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{
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$Log$
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Revision 1.7 2002-10-10 19:57:51 mazen
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* Just to update repsitory
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Revision 1.6 2002/10/10 15:10:39 mazen
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* Internal error fixed, but usually i386 parameter model used
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Revision 1.5 2002/10/09 13:52:19 mazen
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just incase some one wolud help me debugging that\!
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Revision 1.4 2002/10/08 21:02:22 mazen
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* debugging register allocation
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Revision 1.3 2002/10/07 20:33:05 mazen
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word alignement modified in g_stack_frame
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Revision 1.2 2002/10/04 21:57:42 mazen
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* register allocation for parameters now done in cpupara, but InternalError(200109223) in cgcpu.pas:1053 is still not fixed du to location_force problem in ncgutils.pas:419
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Revision 1.1 2002/08/21 13:30:07 mazen
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*** empty log message ***
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Revision 1.2 2002/07/11 14:41:34 florian
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* start of the new generic parameter handling
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Revision 1.1 2002/07/07 09:44:32 florian
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* powerpc target fixed, very simple units can be compiled
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}
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