mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-11-04 01:19:38 +01:00
346 lines
12 KiB
ObjectPascal
346 lines
12 KiB
ObjectPascal
{
|
|
$Id$
|
|
Copyright (c) 2002 by Florian Klaempfl
|
|
|
|
Alpha 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.
|
|
****************************************************************************
|
|
}
|
|
{ Alpha specific calling conventions are handled by this unit
|
|
}
|
|
unit cpupara;
|
|
|
|
{$i fpcdefs.inc}
|
|
|
|
interface
|
|
|
|
uses
|
|
cpubase,
|
|
symconst,symbase,symtype,symdef,paramgr;
|
|
|
|
type
|
|
talphaparamanager = 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,
|
|
defbase;
|
|
|
|
function talphaparamanager.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:=tregister(longint(R_2)+nr);
|
|
end
|
|
else
|
|
begin
|
|
result.loc:=LOC_REFERENCE;
|
|
result.reference.index:=stack_pointer_reg;
|
|
result.reference.offset:=(nr-8)*4;
|
|
end;
|
|
end;
|
|
|
|
function getparaloc(p : tdef) : tloc;
|
|
|
|
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 talphaparamanager.create_param_loc_info(p : tabstractprocdef);
|
|
|
|
var
|
|
nextintreg,nextfloatreg,nextmmreg : tregister;
|
|
stack_offset : aword;
|
|
hp : tparaitem;
|
|
loc : tloc;
|
|
is_64bit: boolean;
|
|
|
|
begin
|
|
nextintreg:=R_3;
|
|
nextfloatreg:=R_F1;
|
|
// nextmmreg:=R_M1;
|
|
stack_offset:=0;
|
|
{ pointer for structured results ? }
|
|
if not is_void(p.rettype.def) then
|
|
begin
|
|
if not(ret_in_reg(p.rettype.def)) then
|
|
inc(nextintreg);
|
|
end;
|
|
|
|
{ frame pointer for nested procedures? }
|
|
{ inc(nextintreg); }
|
|
{ constructor? }
|
|
{ destructor? }
|
|
hp:=tparaitem(p.para.last);
|
|
while assigned(hp) do
|
|
begin
|
|
loc:=getparaloc(hp.paratype.def);
|
|
hp.paraloc.sp_fixup:=0;
|
|
case loc of
|
|
LOC_REGISTER:
|
|
begin
|
|
hp.paraloc.size := def_cgsize(hp.paratype.def);
|
|
{ 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<=tregister(ord(R_10)-ord(is_64bit)) then
|
|
begin
|
|
hp.paraloc.loc:=LOC_REGISTER;
|
|
hp.paraloc.registerlow:=nextintreg;
|
|
inc(nextintreg);
|
|
if is_64bit then
|
|
begin
|
|
hp.paraloc.registerhigh:=nextintreg;
|
|
inc(nextintreg);
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
nextintreg := R_11;
|
|
hp.paraloc.loc:=LOC_REFERENCE;
|
|
hp.paraloc.reference.index:=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 hp.paratyp in [vs_var,vs_out] then
|
|
begin
|
|
if nextintreg<=R_10 then
|
|
begin
|
|
hp.paraloc.size:=OS_ADDR;
|
|
hp.paraloc.loc:=LOC_REGISTER;
|
|
hp.paraloc.register:=nextintreg;
|
|
inc(nextintreg);
|
|
end
|
|
else
|
|
begin
|
|
{!!!!!!!}
|
|
hp.paraloc.size:=def_cgsize(hp.paratype.def);
|
|
internalerror(2002071006);
|
|
end;
|
|
end
|
|
else if nextfloatreg<=R_F10 then
|
|
begin
|
|
hp.paraloc.size:=def_cgsize(hp.paratype.def);
|
|
hp.paraloc.loc:=LOC_FPUREGISTER;
|
|
hp.paraloc.register:=nextfloatreg;
|
|
inc(nextfloatreg);
|
|
end
|
|
else
|
|
begin
|
|
{!!!!!!!}
|
|
hp.paraloc.size:=def_cgsize(hp.paratype.def);
|
|
internalerror(2002071004);
|
|
end;
|
|
end;
|
|
LOC_REFERENCE:
|
|
begin
|
|
hp.paraloc.size:=OS_ADDR;
|
|
if push_addr_param(hp.paratype.def,p.proccalloption in [pocall_cdecl,pocall_cppdecl]) or (hp.paratyp in [vs_var,vs_out]) then
|
|
begin
|
|
if nextintreg<=R_10 then
|
|
begin
|
|
hp.paraloc.loc:=LOC_REGISTER;
|
|
hp.paraloc.register:=nextintreg;
|
|
inc(nextintreg);
|
|
end
|
|
else
|
|
begin
|
|
hp.paraloc.loc:=LOC_REFERENCE;
|
|
hp.paraloc.reference.index:=stack_pointer_reg;
|
|
hp.paraloc.reference.offset:=stack_offset;
|
|
inc(stack_offset,4);
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
hp.paraloc.loc:=LOC_REFERENCE;
|
|
hp.paraloc.reference.index:=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.previous);
|
|
end;
|
|
end;
|
|
|
|
function talphaparamanager.getfuncretparaloc(p : tabstractprocdef) : tparalocation;
|
|
begin
|
|
case p.rettype.def.deftype of
|
|
orddef,
|
|
enumdef:
|
|
begin
|
|
getfuncretparaloc.loc:=LOC_REGISTER;
|
|
getfuncretparaloc.register:=R_3;
|
|
getfuncretparaloc.size:=def_cgsize(p.rettype.def);
|
|
if getfuncretparaloc.size in [OS_S64,OS_64] then
|
|
getfuncretparaloc.registerhigh:=R_4;
|
|
end;
|
|
floatdef:
|
|
begin
|
|
getfuncretparaloc.loc:=LOC_FPUREGISTER;
|
|
getfuncretparaloc.register:=R_F1;
|
|
getfuncretparaloc.size:=def_cgsize(p.rettype.def);
|
|
end;
|
|
pointerdef,
|
|
formaldef,
|
|
classrefdef,
|
|
recorddef,
|
|
objectdef,
|
|
stringdef,
|
|
procvardef,
|
|
filedef,
|
|
arraydef,
|
|
errordef:
|
|
begin
|
|
getfuncretparaloc.loc:=LOC_REGISTER;
|
|
getfuncretparaloc.register:=R_3;
|
|
getfuncretparaloc.size:=OS_ADDR;
|
|
end;
|
|
else
|
|
internalerror(2002090903);
|
|
end;
|
|
end;
|
|
|
|
|
|
begin
|
|
paramanager:=talphaparamanager.create;
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.1 2002-09-29 23:54:12 florian
|
|
* alpha compiles again, changes to common code not yet commited
|
|
|
|
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
|
|
}
|