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fpc/compiler/sparc/cpupara.pas
peter 32d076480b * framepointer fixes for sparc 
* parent framepointer code more generic
2003-07-06 17:58:22 +00:00

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{
$Id$
Copyright (c) 1998-2002 by Florian Klaempfl
Calling conventions for the SPARC
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 cpupara;
{$i fpcdefs.inc}
interface
uses
cpubase,
aasmtai,
symconst,symbase,symtype,symdef,paramgr;
type
TSparcParaManager=class(TParaManager)
{Returns a structure giving the information on the storage of the parameter
(which must be an integer parameter)
@param(nr Parameter number of routine, starting from 1)}
function getintparaloc(list: taasmoutput; nr : longint) : tparalocation;override;
procedure freeintparaloc(list: taasmoutput; nr : longint); override;
{Creates location information related to the parameter of the function}
procedure allocparaloc(list: taasmoutput; const loc: tparalocation);override;
procedure freeparaloc(list: taasmoutput; const loc: tparalocation);override;
procedure create_paraloc_info(p:TAbstractProcDef; side: tcallercallee);override;
{Returns the location where the invisible parameter for structured function
results will be passed.}
function GetFuncRetParaLoc(p:TAbstractProcDef):TParaLocation;override;
procedure splitparaloc64(const locpara:tparalocation;var loclopara,lochipara:tparalocation);override;
end;
implementation
uses
verbose,
cpuinfo,cginfo,cgbase,
defutil,rgobj;
function TSparcParaManager.GetIntParaLoc(List:TAasmOutput;nr:longint):TParaLocation;
begin
if nr<1 then
InternalError(2002100806);
FillChar(GetIntParaLoc,SizeOf(TParaLocation),0);
Dec(nr);
with GetIntParaLoc do
begin
{ The six first parameters are passed into registers }
if nr<6 then
begin
loc:=LOC_REGISTER;
register.enum:=R_INTREGISTER;
register.number:=(RS_O0+nr) shl 8;
rg.getexplicitregisterint(list,register.number);
end
else
{ The other parameters are passed on the stack }
begin
loc:=LOC_REFERENCE;
reference.index.enum:=R_INTREGISTER;
reference.index.number:=NR_STACK_POINTER_REG;
reference.offset:=92+(nr-6)*4;
end;
size:=OS_INT;
end;
end;
procedure tsparcparamanager.freeintparaloc(list: taasmoutput; nr : longint);
var
r: tregister;
begin
if nr<1 then
internalerror(2003060401);
Dec(nr);
if nr<6 then
begin
r.enum:=R_INTREGISTER;
r.number:=(RS_O0+nr) shl 8;
rg.ungetregisterint(list,r);
end;
end;
procedure tsparcparamanager.allocparaloc(list: taasmoutput; const loc: tparalocation);
begin
if (loc.loc=LOC_REFERENCE) and
(loc.low_in_reg) then
rg.getexplicitregisterint(list,loc.lowreg.number);
inherited allocparaloc(list,loc);
end;
procedure tsparcparamanager.freeparaloc(list: taasmoutput; const loc: tparalocation);
begin
if (loc.loc=LOC_REFERENCE) and
(loc.low_in_reg) then
rg.ungetregisterint(list,loc.lowreg);
inherited freeparaloc(list,loc);
end;
procedure TSparcParaManager.create_paraloc_info(p:TAbstractProcDef; side: tcallercallee);
var
nextintreg : tsuperregister;
stack_offset : longint;
hp : tparaitem;
is_64bit : boolean;
paraloc : tparalocation;
begin
nextintreg:=RS_O0;
{ Nested procedures have the parent framepoint in o0 }
if p.parast.symtablelevel>normal_function_level then
inc(NextIntReg);
stack_offset:=92;
hp:=TParaItem(p.para.First);
while assigned(hp) do
begin
fillchar(paraloc,sizeof(tparalocation),0);
if push_addr_param(hp.paratype.def,p.proccalloption) or (hp.paratyp in [vs_var,vs_out]) then
paraloc.size:=OS_ADDR
else
begin
paraloc.size:=def_cgSize(hp.paratype.def);
if paraloc.size=OS_NO then
paraloc.size:=OS_ADDR;
end;
is_64bit:=(paraloc.size in [OS_64,OS_S64,OS_F64]);
if NextIntReg<=RS_O5-ord(is_64bit) then
begin
paraloc.loc:=LOC_REGISTER;
paraloc.registerlow.enum:=R_INTREGISTER;
paraloc.registerlow.number:=NextIntReg shl 8;
inc(NextIntReg);
if is_64bit then
begin
paraloc.registerhigh.enum:=R_INTREGISTER;
paraloc.registerhigh.number:=nextintreg shl 8;
inc(nextintreg);
end;
end
else
begin
paraloc.loc:=LOC_REFERENCE;
{ Low part need to be in O5 if still available }
if NextIntReg<=RS_O5 then
begin
paraloc.low_in_reg:=true;
paraloc.lowreg.enum:=R_INTREGISTER;
paraloc.lowreg.number:=nextintreg shl 8;
end;
nextintreg:=RS_O6;
paraloc.reference.index.enum:=R_INTREGISTER;
paraloc.reference.index.number:=NR_STACK_POINTER_REG;
paraloc.reference.offset:=stack_offset;
if is_64bit and
(not paraloc.low_in_reg) then
inc(stack_offset,8)
else
inc(stack_offset,4);
end;
if side = callerside then
hp.callerparaloc:=paraloc
else
begin
{ update callee paraloc and use Ix registers instead
of Ox registers }
hp.calleeparaloc:=paraloc;
if hp.calleeparaloc.loc=LOC_REGISTER then
begin
inc(hp.calleeparaloc.registerlow.number,(RS_I0-RS_O0) shl 8);
if is_64bit then
inc(hp.calleeparaloc.registerhigh.number,(RS_I0-RS_O0) shl 8);
end
else
begin
if hp.calleeparaloc.low_in_reg then
inc(hp.calleeparaloc.lowreg.number,(RS_I0-RS_O0) shl 8);
inc(hp.calleeparaloc.reference.index.number,(RS_I0-RS_O0) shl 8);
end;
end;
hp:=TParaItem(hp.Next);
end;
end;
function tSparcParaManager.GetFuncRetParaLoc(p:TAbstractProcDef):TParaLocation;
begin
with GetFuncRetParaLoc do
begin
case p.rettype.def.deftype of
orddef,enumdef:
begin
loc:=LOC_REGISTER;
register.enum:=R_INTREGISTER;
register.number:=NR_FUNCTION_RETURN_REG;
size:=def_cgsize(p.rettype.def);
if size in [OS_S64,OS_64] then
internalerror(200305309);
end;
floatdef:
begin
loc:=LOC_FPUREGISTER;
register.enum:=R_F1;
size:=def_cgsize(p.rettype.def);
end;
setdef,
variantdef,
pointerdef,
formaldef,
classrefdef,
recorddef,
objectdef,
stringdef,
procvardef,
filedef,
arraydef,
errordef:
begin
loc:=LOC_REFERENCE;
reference.index.enum:=R_INTREGISTER;
reference.index.number:=NR_FRAME_POINTER_REG;
reference.offset:=64;
size:=OS_ADDR;
end;
else
internalerror(2002090903);
end;
end;
end;
procedure tsparcparamanager.splitparaloc64(const locpara:tparalocation;var loclopara,lochipara:tparalocation);
begin
{ Word 0 is in register, word 1 is in reference }
if (locpara.loc=LOC_REFERENCE) and locpara.low_in_reg then
begin
{ high }
lochipara:=locpara;
if locpara.size=OS_S64 then
lochipara.size:=OS_S32
else
lochipara.size:=OS_32;
lochipara.low_in_reg:=false;
{ low }
loclopara:=locpara;
loclopara.size:=OS_32;
loclopara.loc:=LOC_REGISTER;
loclopara.register:=locpara.lowreg;
end
else
inherited splitparaloc64(locpara,loclopara,lochipara);
end;
begin
ParaManager:=TSparcParaManager.create;
end.
{
$Log$
Revision 1.24 2003-07-06 17:58:22 peter
* framepointer fixes for sparc
* parent framepointer code more generic
Revision 1.23 2003/07/05 20:11:41 jonas
* create_paraloc_info() is now called separately for the caller and
callee info
* fixed ppc cycle
Revision 1.22 2003/07/02 22:18:04 peter
* paraloc splitted in callerparaloc,calleeparaloc
* sparc calling convention updates
Revision 1.21 2003/06/17 16:36:59 peter
* freeintparaloc
Revision 1.20 2003/06/09 21:44:14 mazen
* fix compile problem related to modification
of the declareation of GetIntParaLoc in the
ancestor's declaration
Revision 1.19 2003/06/01 21:38:06 peter
* getregisterfpu size parameter added
* op_const_reg size parameter added
* sparc updates
Revision 1.18 2003/05/31 01:00:51 peter
* register fixes
Revision 1.17 2003/05/30 23:57:08 peter
* more sparc cleanup
* accumulator removed, splitted in function_return_reg (called) and
function_result_reg (caller)
Revision 1.16 2003/04/23 13:35:39 peter
* fix sparc compile
Revision 1.15 2003/04/23 12:35:35 florian
* fixed several issues with powerpc
+ applied a patch from Jonas for nested function calls (PowerPC only)
* ...
Revision 1.14 2003/01/08 18:43:58 daniel
* Tregister changed into a record
Revision 1.13 2003/01/05 21:32:35 mazen
* fixing several bugs compiling the RTL
Revision 1.12 2002/11/25 19:21:49 mazen
* fixed support of nSparcInline
Revision 1.11 2002/11/25 17:43:28 peter
* splitted defbase in defutil,symutil,defcmp
* merged isconvertable and is_equal into compare_defs(_ext)
* made operator search faster by walking the list only once
Revision 1.10 2002/11/18 17:32:01 peter
* pass proccalloption to ret_in_xxx and push_xxx functions
Revision 1.9 2002/11/03 20:22:40 mazen
* parameter handling updated
Revision 1.8 2002/10/13 21:46:07 mazen
* assembler output format fixed
Revision 1.7 2002/10/10 19:57:51 mazen
* Just to update repsitory
Revision 1.6 2002/10/10 15:10:39 mazen
* Internal error fixed, but usually i386 parameter model used
Revision 1.5 2002/10/09 13:52:19 mazen
just incase some one wolud help me debugging that\!
Revision 1.4 2002/10/08 21:02:22 mazen
* debugging register allocation
Revision 1.3 2002/10/07 20:33:05 mazen
word alignement modified in g_stack_frame
Revision 1.2 2002/10/04 21:57:42 mazen
* 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
Revision 1.1 2002/08/21 13:30:07 mazen
*** empty log message ***
Revision 1.2 2002/07/11 14:41:34 florian
* start of the new generic parameter handling
Revision 1.1 2002/07/07 09:44:32 florian
* powerpc target fixed, very simple units can be compiled
}
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