mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-11-04 11:39:40 +01:00
105 lines
3.2 KiB
ObjectPascal
105 lines
3.2 KiB
ObjectPascal
{
|
|
Copyright (c) 1998-2002 by Florian Klaempfl
|
|
|
|
Common x86 support for call nodes
|
|
|
|
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 nx86cal;
|
|
|
|
{$i fpcdefs.inc}
|
|
|
|
interface
|
|
|
|
{ $define AnsiStrRef}
|
|
|
|
uses
|
|
symdef,
|
|
cgutils,
|
|
ncgcal,parabase;
|
|
|
|
type
|
|
|
|
{ tx86callnode }
|
|
|
|
tx86callnode = class(tcgcallnode)
|
|
protected
|
|
procedure do_release_unused_return_value;override;
|
|
procedure set_result_location(realresdef: tstoreddef);override;
|
|
function can_call_ref(var ref: treference):boolean;override;
|
|
function do_call_ref(ref: treference): tcgpara;override;
|
|
end;
|
|
|
|
|
|
implementation
|
|
|
|
uses
|
|
globtype,cgobj,
|
|
cgbase,cpubase,cgx86,cga,aasmdata,aasmcpu,
|
|
hlcgobj;
|
|
|
|
|
|
{*****************************************************************************
|
|
TX86CALLNODE
|
|
*****************************************************************************}
|
|
|
|
procedure tx86callnode.do_release_unused_return_value;
|
|
begin
|
|
case location.loc of
|
|
LOC_FPUREGISTER :
|
|
begin
|
|
{ release FPU stack }
|
|
emit_reg(A_FSTP,S_NO,NR_FPU_RESULT_REG);
|
|
tcgx86(cg).dec_fpu_stack;
|
|
end
|
|
else
|
|
inherited do_release_unused_return_value;
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tx86callnode.set_result_location(realresdef: tstoreddef);
|
|
begin
|
|
if (retloc.location^.loc=LOC_FPUREGISTER) then
|
|
begin
|
|
tcgx86(cg).inc_fpu_stack;
|
|
location_reset(location,LOC_FPUREGISTER,retloc.location^.size);
|
|
location.register:=retloc.location^.register;
|
|
end
|
|
else
|
|
inherited set_result_location(realresdef);
|
|
end;
|
|
|
|
|
|
function tx86callnode.can_call_ref(var ref: treference): boolean;
|
|
begin
|
|
tcgx86(cg).make_simple_ref(current_asmdata.CurrAsmList,ref);
|
|
{ do not use a ref. for calling conventions which allocate all registers, the reg. allocator cannot handle this, see
|
|
also issue #28639, I were not able to create a simple example though to cause the resulting endless spilling }
|
|
result:=((getsupreg(ref.base)<first_int_imreg) and (getsupreg(ref.index)<first_int_imreg)) or
|
|
not(procdefinition.proccalloption in [pocall_far16,pocall_pascal,pocall_oldfpccall]);
|
|
end;
|
|
|
|
|
|
function tx86callnode.do_call_ref(ref: treference): tcgpara;
|
|
begin
|
|
current_asmdata.CurrAsmList.concat(taicpu.op_ref(A_CALL,S_NO,ref));
|
|
result:=hlcg.get_call_result_cgpara(procdefinition,typedef)
|
|
end;
|
|
|
|
end.
|