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fpc/compiler/x86/agx86att.pas
pierre 3fd3cc8099 * Avoid warning for i386 cpu 
git-svn-id: trunk@17851 -
2011-06-28 08:02:35 +00:00

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{
Copyright (c) 1998-2002 by Florian Klaempfl
This unit implements an asmoutput class for i386 AT&T syntax
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.
****************************************************************************
}
{ This unit implements an asmoutput class for i386 AT&T syntax
}
unit agx86att;
{$i fpcdefs.inc}
interface
uses
cclasses,cpubase,
globals,cgutils,
aasmbase,aasmtai,aasmdata,assemble,aggas;
type
Tx86ATTAssembler=class(TGNUassembler)
constructor create(smart: boolean); override;
end;
Tx86AppleGNUAssembler=class(TAppleGNUassembler)
constructor create(smart: boolean); override;
end;
Tx86AoutGNUAssembler=class(TAoutGNUassembler)
constructor create(smart: boolean); override;
end;
Tx86InstrWriter=class(TCPUInstrWriter)
private
procedure WriteReference(var ref : treference);
procedure WriteOper(const o:toper);
procedure WriteOper_jmp(const o:toper);
public
procedure WriteInstruction(hp: tai);override;
end;
implementation
uses
globtype,
cutils,systems,
verbose,
itcpugas,
cgbase,
aasmcpu;
{****************************************************************************
Tx86ATTAssembler
****************************************************************************}
constructor Tx86ATTAssembler.create(smart: boolean);
begin
inherited create(smart);
InstrWriter := Tx86InstrWriter.create(self);
end;
{****************************************************************************
Tx86AppleGNUAssembler
****************************************************************************}
constructor Tx86AppleGNUAssembler.create(smart: boolean);
begin
inherited create(smart);
InstrWriter := Tx86InstrWriter.create(self);
end;
{****************************************************************************
Tx86AoutGNUAssembler
****************************************************************************}
constructor Tx86AoutGNUAssembler.create(smart: boolean);
begin
inherited create(smart);
InstrWriter := Tx86InstrWriter.create(self);
end;
{****************************************************************************
Tx86InstrWriter
****************************************************************************}
procedure Tx86InstrWriter.WriteReference(var ref : treference);
begin
with ref do
begin
{ do we have a segment prefix ? }
{ These are probably not correctly handled under GAS }
{ should be replaced by coding the segment override }
{ directly! - DJGPP FAQ }
if segment<>NR_NO then
owner.AsmWrite(gas_regname(segment)+':');
if assigned(symbol) then
owner.AsmWrite(symbol.name);
if assigned(relsymbol) then
owner.AsmWrite('-'+relsymbol.name);
if ref.refaddr=addr_pic then
{$ifdef x86_64}
begin
{ local symbols don't have to (and in case of Mac OS X: cannot)
be accessed via the GOT
}
if not assigned(ref.symbol) or
(ref.symbol.bind<>AB_LOCAL) then
owner.AsmWrite('@GOTPCREL');
end;
{$else x86_64}
owner.AsmWrite('@GOT');
{$endif x86_64}
if offset<0 then
owner.AsmWrite(tostr(offset))
else
if (offset>0) then
begin
if assigned(symbol) then
owner.AsmWrite('+'+tostr(offset))
else
owner.AsmWrite(tostr(offset));
end
else if (index=NR_NO) and (base=NR_NO) and (not assigned(symbol)) then
owner.AsmWrite('0');
if (index<>NR_NO) and (base=NR_NO) then
begin
owner.AsmWrite('(,'+gas_regname(index));
if scalefactor<>0 then
owner.AsmWrite(','+tostr(scalefactor)+')')
else
owner.AsmWrite(')');
end
else
if (index=NR_NO) and (base<>NR_NO) then
owner.AsmWrite('('+gas_regname(base)+')')
else
if (index<>NR_NO) and (base<>NR_NO) then
begin
owner.AsmWrite('('+gas_regname(base)+','+gas_regname(index));
if scalefactor<>0 then
owner.AsmWrite(','+tostr(scalefactor));
owner.AsmWrite(')');
end;
end;
end;
procedure Tx86InstrWriter.WriteOper(const o:toper);
begin
case o.typ of
top_reg :
owner.AsmWrite(gas_regname(o.reg));
top_ref :
if o.ref^.refaddr in [addr_no,addr_pic,addr_pic_no_got] then
WriteReference(o.ref^)
else
begin
owner.AsmWrite('$');
if assigned(o.ref^.symbol) then
owner.AsmWrite(o.ref^.symbol.name);
if o.ref^.offset>0 then
owner.AsmWrite('+'+tostr(o.ref^.offset))
else
if o.ref^.offset<0 then
owner.AsmWrite(tostr(o.ref^.offset))
else
if not(assigned(o.ref^.symbol)) then
owner.AsmWrite('0');
end;
top_const :
owner.AsmWrite('$'+tostr(o.val));
else
internalerror(10001);
end;
end;
procedure Tx86InstrWriter.WriteOper_jmp(const o:toper);
begin
case o.typ of
top_reg :
owner.AsmWrite('*'+gas_regname(o.reg));
top_ref :
begin
if o.ref^.refaddr=addr_no then
begin
owner.AsmWrite('*');
WriteReference(o.ref^);
end
else
begin
owner.AsmWrite(o.ref^.symbol.name);
if o.ref^.refaddr=addr_pic then
owner.AsmWrite('@PLT');
if o.ref^.offset>0 then
owner.AsmWrite('+'+tostr(o.ref^.offset))
else
if o.ref^.offset<0 then
owner.AsmWrite(tostr(o.ref^.offset));
end;
end;
top_const :
owner.AsmWrite(tostr(o.val));
else
internalerror(10001);
end;
end;
procedure Tx86InstrWriter.WriteInstruction(hp: tai);
var
op : tasmop;
val : aint;
calljmp : boolean;
need_second_mov : boolean;
i : integer;
comment : tai_comment;
begin
if hp.typ <> ait_instruction then
exit;
taicpu(hp).SetOperandOrder(op_att);
op:=taicpu(hp).opcode;
calljmp:=is_calljmp(op);
{ constant values in the 32 bit range are sign-extended to
64 bits, but this is not what we want. PM 2010-09-02
the fix consists of simply setting only the 4-byte register
as the upper 4-bytes will be zeroed at the same time. }
need_second_mov:=false;
if (op=A_MOV) and (taicpu(hp).opsize=S_Q) and
(taicpu(hp).oper[0]^.typ = top_const) then
begin
val := taicpu(hp).oper[0]^.val;
{$ifdef x86_64}
if (val > int64($7fffffff)) and (val < int64($100000000)) then
begin
owner.AsmWrite(target_asm.comment);
owner.AsmWritePChar('Fix for Win64-GAS bug');
owner.AsmLn;
taicpu(hp).opsize:=S_L;
if taicpu(hp).oper[1]^.typ = top_reg then
setsubreg(taicpu(hp).oper[1]^.reg,R_SUBD)
else if taicpu(hp).oper[1]^.typ = top_ref then
need_second_mov:=true
else
internalerror(20100902);
end;
{$endif x86_64}
end;
owner.AsmWrite(#9);
{ movsd should not be translated to movsl when there
are (xmm) arguments }
if (op=A_MOVSD) and (taicpu(hp).ops>0) then
owner.AsmWrite('movsd')
else
owner.AsmWrite(gas_op2str[op]);
owner.AsmWrite(cond2str[taicpu(hp).condition]);
{ suffix needed ? fnstsw,fldcw don't support suffixes
with binutils 2.9.5 under linux }
{ if (Taicpu(hp).oper[0]^.typ=top_reg) and
(Taicpu(hp).oper[0]^.reg.enum>lastreg) then
internalerror(200301081);}
if (not calljmp) and
(gas_needsuffix[op]<>AttSufNONE) and
(op<>A_FNSTSW) and
(op<>A_FSTSW) and
(op<>A_FNSTCW) and
(op<>A_FSTCW) and
(op<>A_FLDCW) and
not(
(taicpu(hp).ops<>0) and
(taicpu(hp).oper[0]^.typ=top_reg) and
(getregtype(taicpu(hp).oper[0]^.reg)=R_FPUREGISTER)
) then
owner.AsmWrite(gas_opsize2str[taicpu(hp).opsize]);
{ process operands }
if taicpu(hp).ops<>0 then
begin
if calljmp then
begin
owner.AsmWrite(#9);
WriteOper_jmp(taicpu(hp).oper[0]^);
end
else
begin
for i:=0 to taicpu(hp).ops-1 do
begin
if i=0 then
owner.AsmWrite(#9)
else
owner.AsmWrite(',');
WriteOper(taicpu(hp).oper[i]^);
end;
end;
end;
owner.AsmLn;
if need_second_mov then
begin
taicpu(hp).oper[0]^.val:=0;
inc(taicpu(hp).oper[1]^.ref^.offset,4);
WriteInstruction(hp);
end;
end;
{*****************************************************************************
Initialize
*****************************************************************************}
const
{$ifdef x86_64}
as_x86_64_as_info : tasminfo =
(
id : as_gas;
idtxt : 'AS';
asmbin : 'as';
asmcmd : '--64 -o $OBJ $ASM';
supported_targets : [system_x86_64_linux,system_x86_64_freebsd,system_x86_64_win64,system_x86_64_embedded];
flags : [af_allowdirect,af_needar,af_smartlink_sections,af_supports_dwarf];
labelprefix : '.L';
comment : '# ';
);
as_x86_64_gas_info : tasminfo =
(
id : as_ggas;
idtxt : 'GAS';
asmbin : 'gas';
asmcmd : '--64 -o $OBJ $ASM';
supported_targets : [system_x86_64_solaris];
flags : [af_allowdirect,af_needar,af_smartlink_sections,af_supports_dwarf];
labelprefix : '.L';
comment : '# ';
);
as_x86_64_gas_darwin_info : tasminfo =
(
id : as_darwin;
idtxt : 'AS-Darwin';
asmbin : 'as';
asmcmd : '-o $OBJ $ASM -arch x86_64';
supported_targets : [system_x86_64_darwin];
flags : [af_allowdirect,af_needar,af_smartlink_sections,af_supports_dwarf];
labelprefix : 'L';
comment : '# ';
);
{$else x86_64}
as_i386_as_info : tasminfo =
(
id : as_gas;
idtxt : 'AS';
asmbin : 'as';
asmcmd : '--32 -o $OBJ $ASM';
supported_targets : [system_i386_GO32V2,system_i386_linux,system_i386_Win32,system_i386_freebsd,system_i386_solaris,system_i386_beos,
system_i386_netbsd,system_i386_Netware,system_i386_qnx,system_i386_wdosx,system_i386_openbsd,
system_i386_netwlibc,system_i386_wince,system_i386_embedded,system_i386_symbian,system_i386_haiku,system_x86_6432_linux,
system_i386_nativent];
flags : [af_allowdirect,af_needar,af_smartlink_sections,af_supports_dwarf];
labelprefix : '.L';
comment : '# ';
);
as_i386_as_aout_info : tasminfo =
(
id : as_i386_as_aout;
idtxt : 'AS_AOUT';
asmbin : 'as';
asmcmd : '-o $OBJ $ASM';
supported_targets : [system_i386_linux,system_i386_OS2,system_i386_freebsd,system_i386_netbsd,system_i386_openbsd,system_i386_EMX,system_i386_embedded];
flags : [af_allowdirect,af_needar,af_stabs_use_function_absolute_addresses];
labelprefix : 'L';
comment : '# ';
);
as_i386_gas_darwin_info : tasminfo =
(
id : as_darwin;
idtxt : 'AS-Darwin';
asmbin : 'as';
asmcmd : '-o $OBJ $ASM -arch i386';
supported_targets : [system_i386_darwin,system_i386_iphonesim];
flags : [af_allowdirect,af_needar,af_smartlink_sections,af_supports_dwarf,af_stabs_use_function_absolute_addresses];
labelprefix : 'L';
comment : '# ';
);
as_i386_gas_info : tasminfo =
(
id : as_ggas;
idtxt : 'GAS';
asmbin : 'gas';
asmcmd : '--32 -o $OBJ $ASM';
supported_targets : [system_i386_GO32V2,system_i386_linux,system_i386_Win32,system_i386_freebsd,system_i386_solaris,system_i386_beos,
system_i386_netbsd,system_i386_Netware,system_i386_qnx,system_i386_wdosx,system_i386_openbsd,
system_i386_netwlibc,system_i386_wince,system_i386_embedded,system_i386_symbian,system_i386_haiku,system_x86_6432_linux];
flags : [af_allowdirect,af_needar,af_smartlink_sections,af_supports_dwarf];
labelprefix : '.L';
comment : '# ';
);
{$endif x86_64}
initialization
{$ifdef x86_64}
RegisterAssembler(as_x86_64_as_info,Tx86ATTAssembler);
RegisterAssembler(as_x86_64_gas_info,Tx86ATTAssembler);
RegisterAssembler(as_x86_64_gas_darwin_info,Tx86AppleGNUAssembler);
{$else x86_64}
RegisterAssembler(as_i386_as_info,Tx86ATTAssembler);
RegisterAssembler(as_i386_gas_info,Tx86ATTAssembler);
RegisterAssembler(as_i386_gas_darwin_info,Tx86AppleGNUAssembler);
RegisterAssembler(as_i386_as_aout_info,Tx86AoutGNUAssembler);
{$endif x86_64}
end.
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