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fpc/compiler/powerpc/cpupara.pas

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{
$Id$
Copyright (c) 2002 by Florian Klaempfl
PowerPC specific calling conventions
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.
****************************************************************************
}
{ PowerPC specific calling conventions are handled by this unit
}
unit cpupara;
{$i fpcdefs.inc}
interface
uses
cpubase,
symconst,symbase,symtype,symdef,paramgr;
type
tppcparamanager = class(tparamanager)
function getintparaloc(nr : longint) : tparalocation;override;
procedure create_param_loc_info(p : tabstractprocdef);override;
function getfuncretparaloc(p : tabstractprocdef) : tparalocation;override;
end;
implementation
uses
verbose,
globtype,
cpuinfo,cginfo,cgbase,
defutil;
function tppcparamanager.getintparaloc(nr : longint) : tparalocation;
begin
fillchar(result,sizeof(tparalocation),0);
if nr<1 then
internalerror(2002070801)
else if nr<=8 then
begin
result.loc:=LOC_REGISTER;
result.register.enum:=R_INTREGISTER;
result.register.number:=NR_R2+nr*(NR_R1-NR_R0);
end
else
begin
result.loc:=LOC_REFERENCE;
result.reference.index.enum:=R_INTREGISTER;
result.reference.index.number:=NR_STACK_POINTER_REG;
result.reference.offset:=(nr-8)*4;
end;
end;
function getparaloc(p : tdef) : tcgloc;
begin
{ Later, the LOC_REFERENCE is in most cases changed into LOC_REGISTER
if push_addr_param for the def is true
}
case p.deftype of
orddef:
getparaloc:=LOC_REGISTER;
floatdef:
getparaloc:=LOC_FPUREGISTER;
enumdef:
getparaloc:=LOC_REGISTER;
pointerdef:
getparaloc:=LOC_REGISTER;
formaldef:
getparaloc:=LOC_REGISTER;
classrefdef:
getparaloc:=LOC_REGISTER;
recorddef:
getparaloc:=LOC_REFERENCE;
objectdef:
if is_object(p) then
getparaloc:=LOC_REFERENCE
else
getparaloc:=LOC_REGISTER;
stringdef:
if is_shortstring(p) or is_longstring(p) then
getparaloc:=LOC_REFERENCE
else
getparaloc:=LOC_REGISTER;
procvardef:
if (po_methodpointer in tprocvardef(p).procoptions) then
getparaloc:=LOC_REFERENCE
else
getparaloc:=LOC_REGISTER;
filedef:
getparaloc:=LOC_REGISTER;
arraydef:
getparaloc:=LOC_REFERENCE;
setdef:
if is_smallset(p) then
getparaloc:=LOC_REGISTER
else
getparaloc:=LOC_REFERENCE;
variantdef:
getparaloc:=LOC_REFERENCE;
{ avoid problems with errornous definitions }
errordef:
getparaloc:=LOC_REGISTER;
else
internalerror(2002071001);
end;
end;
procedure tppcparamanager.create_param_loc_info(p : tabstractprocdef);
var
nextintreg,nextfloatreg,nextmmreg : tregister;
paradef : tdef;
stack_offset : aword;
hp : tparaitem;
loc : tcgloc;
is_64bit: boolean;
procedure assignintreg;
begin
if nextintreg.number<=NR_R10 then
begin
hp.paraloc.loc:=LOC_REGISTER;
hp.paraloc.register:=nextintreg;
inc(nextintreg.number,NR_R1-NR_R0);
end
else
begin
hp.paraloc.loc:=LOC_REFERENCE;
hp.paraloc.reference.index.enum:=R_INTREGISTER;
hp.paraloc.reference.index.number:=NR_STACK_POINTER_REG;
hp.paraloc.reference.offset:=stack_offset;
inc(stack_offset,4);
end;
end;
begin
nextintreg.enum:=R_INTREGISTER;
nextintreg.number:=NR_R3;
nextfloatreg.enum:=R_F1;
nextmmreg.enum:=R_M1;
stack_offset:=0;
{ frame pointer for nested procedures? }
{ inc(nextintreg); }
{ constructor? }
{ destructor? }
hp:=tparaitem(p.para.first);
while assigned(hp) do
begin
if (hp.paratyp in [vs_var,vs_out]) then
paradef := voidpointertype.def
else
paradef := hp.paratype.def;
loc:=getparaloc(paradef);
hp.paraloc.sp_fixup:=0;
case loc of
LOC_REGISTER:
begin
hp.paraloc.size := def_cgsize(paradef);
{ for things like formaldef }
if hp.paraloc.size = OS_NO then
hp.paraloc.size := OS_ADDR;
is_64bit := hp.paraloc.size in [OS_64,OS_S64];
if nextintreg.number<=(NR_R10-ord(is_64bit)*(NR_R1-NR_R0)) then
begin
hp.paraloc.loc:=LOC_REGISTER;
hp.paraloc.registerlow:=nextintreg;
inc(nextintreg.number,NR_R1-NR_R0);
if is_64bit then
begin
hp.paraloc.registerhigh:=nextintreg;
inc(nextintreg.number,NR_R1-NR_R0);
end;
end
else
begin
nextintreg.number := NR_R11;
hp.paraloc.loc:=LOC_REFERENCE;
hp.paraloc.reference.index.enum:=R_INTREGISTER;
hp.paraloc.reference.index.number:=NR_STACK_POINTER_REG;
hp.paraloc.reference.offset:=stack_offset;
if not is_64bit then
inc(stack_offset,4)
else
inc(stack_offset,8);
end;
end;
LOC_FPUREGISTER:
begin
if nextfloatreg.enum<=R_F10 then
begin
hp.paraloc.size:=def_cgsize(paradef);
hp.paraloc.loc:=LOC_FPUREGISTER;
hp.paraloc.register:=nextfloatreg;
inc(nextfloatreg.enum);
end
else
begin
{!!!!!!!}
hp.paraloc.size:=def_cgsize(paradef);
internalerror(2002071004);
end;
end;
LOC_REFERENCE:
begin
hp.paraloc.size:=OS_ADDR;
if push_addr_param(paradef,p.proccalloption) or
is_open_array(paradef) or
is_array_of_const(paradef) then
assignintreg
else
begin
hp.paraloc.loc:=LOC_REFERENCE;
hp.paraloc.reference.index.enum:=R_INTREGISTER;
hp.paraloc.reference.index.number:=NR_STACK_POINTER_REG;
hp.paraloc.reference.offset:=stack_offset;
inc(stack_offset,hp.paratype.def.size);
end;
end;
else
internalerror(2002071002);
end;
hp:=tparaitem(hp.next);
end;
end;
function tppcparamanager.getfuncretparaloc(p : tabstractprocdef) : tparalocation;
begin
case p.rettype.def.deftype of
orddef,
enumdef:
begin
getfuncretparaloc.loc:=LOC_REGISTER;
getfuncretparaloc.register.enum:=R_INTREGISTER;
getfuncretparaloc.register.number:=NR_R3;
getfuncretparaloc.size:=def_cgsize(p.rettype.def);
if getfuncretparaloc.size in [OS_S64,OS_64] then
begin
getfuncretparaloc.registerhigh.enum:=R_INTREGISTER;
getfuncretparaloc.registerhigh.number:=NR_R4;
end;
end;
floatdef:
begin
getfuncretparaloc.loc:=LOC_FPUREGISTER;
getfuncretparaloc.register.enum:=R_F1;
getfuncretparaloc.size:=def_cgsize(p.rettype.def);
end;
{ smallsets are OS_INT in R3, others are OS_ADDR in R3 -> the same }
{ ugly, I know :) (JM) }
setdef,
variantdef,
pointerdef,
formaldef,
classrefdef,
recorddef,
objectdef,
stringdef,
procvardef,
filedef,
arraydef,
errordef:
begin
getfuncretparaloc.loc:=LOC_REGISTER;
getfuncretparaloc.register.enum:=R_INTREGISTER;
getfuncretparaloc.register.number:=NR_R3;
getfuncretparaloc.size:=OS_ADDR;
end;
else
internalerror(2002090903);
end;
end;
begin
paramanager:=tppcparamanager.create;
end.
{
$Log$
Revision 1.27 2003-04-26 11:30:59 florian
* fixed the powerpc to work with the new function result handling
Revision 1.26 2003/04/23 12:35:35 florian
* fixed several issues with powerpc
+ applied a patch from Jonas for nested function calls (PowerPC only)
* ...
Revision 1.25 2003/04/17 18:52:35 jonas
* process para's from first to last instead of the other way round
Revision 1.24 2003/04/16 07:55:07 jonas
* fixed paralocation for integer var/out parameters
Revision 1.23 2003/03/11 21:46:24 jonas
* lots of new regallocator fixes, both in generic and ppc-specific code
(ppc compiler still can't compile the linux system unit though)
Revision 1.22 2003/01/09 22:00:53 florian
* fixed some PowerPC issues
Revision 1.21 2003/01/09 20:41:10 florian
* fixed broken PowerPC compiler
Revision 1.20 2003/01/09 11:22:14 olle
* made powerpc compiler compile after Daniels Tregister modification
Revision 1.19 2003/01/08 18:43:58 daniel
* Tregister changed into a record
Revision 1.18 2002/12/15 19:22:01 florian
* fixed some crashes and a rte 201
Revision 1.17 2002/11/25 17:43:27 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 1.16 2002/11/18 17:32:01 peter
* pass proccalloption to ret_in_xxx and push_xxx functions
Revision 1.15 2002/10/02 13:33:36 jonas
+ set, variant support in getfuncretparaloc
Revision 1.14 2002/09/28 21:27:16 florian
+ getparaloc supports now sets and variants
Revision 1.13 2002/09/10 21:28:05 jonas
* int64 paras are now handled correctly (until the registers are used up
anyway :)
* the return location is now initialized correctly
* fixed bug where ret_in_reg() was called for the procdefinition instead
of for the result of the procedure
Revision 1.12 2002/09/09 09:11:37 florian
- removed passes_parameters_in_reg
Revision 1.11 2002/09/07 17:54:59 florian
* first part of PowerPC fixes
Revision 1.10 2002/09/01 21:04:49 florian
* several powerpc related stuff fixed
Revision 1.9 2002/08/31 12:43:31 florian
* ppc compilation fixed
Revision 1.8 2002/08/18 10:42:38 florian
* remaining assembler writer bugs fixed, the errors in the
system unit are inline assembler problems
Revision 1.7 2002/08/17 22:09:47 florian
* result type handling in tcgcal.pass_2 overhauled
* better tnode.dowrite
* some ppc stuff fixed
Revision 1.6 2002/08/13 21:40:58 florian
* more fixes for ppc calling conventions
Revision 1.5 2002/07/30 20:50:44 florian
* the code generator knows now if parameters are in registers
Revision 1.4 2002/07/28 20:45:22 florian
+ added direct assembler reader for PowerPC
Revision 1.3 2002/07/26 22:22:10 florian
* several PowerPC related fixes to get forward with system unit compilation
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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