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{
Copyright (c) 1998-2010 by Florian Klaempfl and Jonas Maebe
Member of the Free Pascal development team
This unit contains routines to create a pass-through high-level code
generator. This is used by most regular code generators.
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 hlcgx86;
interface
{$i fpcdefs.inc}
uses
globtype,
aasmdata,
symtype,symdef,
parabase,
hlcgobj, hlcg2ll;
type
{ thlcgx86 }
thlcgx86 = class(thlcg2ll)
protected
procedure gen_load_uninitialized_function_result(list: TAsmList; pd: tprocdef; resdef: tdef; const resloc: tcgpara); override;
procedure a_jmp_external_name(list: TAsmList; const externalname: TSymStr); override;
public
procedure a_load_undefined_cgpara(list: TAsmList; size: tdef; const cgpara: TCGPara); override;
end;
implementation
uses
globals,systems,
aasmbase,
cgbase,cgutils,
cpubase,aasmcpu;
{ thlcgx86 }
procedure thlcgx86.gen_load_uninitialized_function_result(list: TAsmList; pd: tprocdef; resdef: tdef; const resloc: tcgpara);
begin
{ the caller will pop a value from the fpu stack }
if assigned(resloc.location) and
(resloc.location^.loc=LOC_FPUREGISTER) then
list.concat(taicpu.op_none(A_FLDZ));
end;
procedure thlcgx86.a_jmp_external_name(list: TAsmList; const externalname: TSymStr);
var
ref : treference;
sym : tasmsymbol;
begin
if (target_info.system = system_i386_darwin) then
begin
{ a_jmp_name jumps to a stub which is always pic-safe on darwin }
inherited;
exit;
end;
sym:=current_asmdata.RefAsmSymbol(externalname,AT_FUNCTION);
reference_reset_symbol(ref,sym,0,sizeof(pint),[]);
{ create pic'ed? }
if (cs_create_pic in current_settings.moduleswitches) and
{ darwin/x86_64's assembler doesn't want @PLT after call symbols }
not(target_info.system in [system_x86_64_darwin,system_i386_iphonesim,system_x86_64_iphonesim]) then
ref.refaddr:=addr_pic
else
ref.refaddr:=addr_full;
list.concat(taicpu.op_ref(A_JMP,S_NO,ref));
end;
procedure thlcgx86.a_load_undefined_cgpara(list: TAsmList; size: tdef; const cgpara: TCGPara);
begin
if not (cgpara.Location^.Loc in [LOC_REGISTER,LOC_CREGISTER]) and
(cgpara.size=OS_ADDR) then
a_load_reg_cgpara(list,size,NR_FRAME_POINTER_REG,cgpara)
else
inherited;
end;
end.
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