paweld/fpc
1
0
Fork 0
mirror of https://gitlab.com/freepascal.org/fpc/source.git synced 2025-05-01 15:53:50 +02:00
Code Issues Packages Projects Releases Wiki Activity
d91c880148
fpc/compiler/x86/agx86att.pas

454 lines
14 KiB
ObjectPascal
Raw Blame History

{
$Id$
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,
aasmbase,aasmtai,assemble,aggas;
type
Tx86ATTAssembler=class(TGNUassembler)
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
cutils,systems,
verbose,
itx86att,
aasmcpu;
{****************************************************************************
TX86ATTASMOUTPUT
****************************************************************************}
procedure Tx86AttAssembler.WriteReference(var ref : treference);
begin
with ref do
begin
inc(offset,offsetfixup);
offsetfixup:=0;
if segment.enum>lastreg then
internalerror(200301081);
if base.enum>lastreg then
internalerror(200301081);
if index.enum>lastreg then
internalerror(200301081);
{ have we a segment prefix ? }
{ These are probably not correctly handled under GAS }
{ should be replaced by coding the segment override }
{ directly! - DJGPP FAQ }
if segment.enum<>R_NO then
AsmWrite(gas_reg2str[segment.enum]+':');
if assigned(symbol) then
AsmWrite(symbol.name);
if offset<0 then
AsmWrite(tostr(offset))
else
if (offset>0) then
begin
if assigned(symbol) then
AsmWrite('+'+tostr(offset))
else
AsmWrite(tostr(offset));
end
else if (index.enum=R_NO) and (base.enum=R_NO) and not assigned(symbol) then
AsmWrite('0');
if (index.enum<>R_NO) and (base.enum=R_NO) then
begin
AsmWrite('(,'+gas_reg2str[index.enum]);
if scalefactor<>0 then
AsmWrite(','+tostr(scalefactor)+')')
else
AsmWrite(')');
end
else
if (index.enum=R_NO) and (base.enum<>R_NO) then
AsmWrite('('+gas_reg2str[base.enum]+')')
else
if (index.enum<>R_NO) and (base.enum<>R_NO) then
begin
AsmWrite('('+gas_reg2str[base.enum]+','+gas_reg2str[index.enum]);
if scalefactor<>0 then
AsmWrite(','+tostr(scalefactor));
AsmWrite(')');
end;
end;
end;
procedure Tx86AttAssembler.WriteOper(const o:toper);
begin
case o.typ of
top_reg :
begin
if o.reg.enum>lastreg then
internalerror(200301081);
AsmWrite(gas_reg2str[o.reg.enum]);
end;
top_ref :
WriteReference(o.ref^);
top_const :
AsmWrite('$'+tostr(longint(o.val)));
top_symbol :
begin
AsmWrite('$');
if assigned(o.sym) then
AsmWrite(o.sym.name);
if o.symofs>0 then
AsmWrite('+'+tostr(o.symofs))
else
if o.symofs<0 then
AsmWrite(tostr(o.symofs))
else
if not(assigned(o.sym)) then
AsmWrite('0');
end;
else
internalerror(10001);
end;
end;
procedure Tx86AttAssembler.WriteOper_jmp(const o:toper);
begin
case o.typ of
top_reg :
begin
if o.reg.enum>lastreg then
internalerror(200301081);
AsmWrite('*'+gas_reg2str[o.reg.enum]);
end;
top_ref :
begin
AsmWrite('*');
WriteReference(o.ref^);
end;
top_const :
AsmWrite(tostr(longint(o.val)));
top_symbol :
begin
AsmWrite(o.sym.name);
if o.symofs>0 then
AsmWrite('+'+tostr(o.symofs))
else
if o.symofs<0 then
AsmWrite(tostr(o.symofs));
end;
else
internalerror(10001);
end;
end;
procedure Tx86AttAssembler.WriteInstruction(hp: tai);
var
op : tasmop;
calljmp : boolean;
i : integer;
begin
if hp.typ <> ait_instruction then
exit;
taicpu(hp).SetOperandOrder(op_att);
op:=taicpu(hp).opcode;
calljmp:=is_calljmp(op);
{ call maybe not translated to call }
AsmWrite(#9+gas_op2str[op]+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).oper[0].typ=top_reg) and
(taicpu(hp).oper[0].reg.enum in [R_ST..R_ST7])
) then
AsmWrite(gas_opsize2str[taicpu(hp).opsize]);
{ process operands }
if taicpu(hp).ops<>0 then
begin
if calljmp then
begin
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
AsmWrite(#9)
else
AsmWrite(',');
WriteOper(taicpu(hp).oper[i]);
end;
end;
end;
AsmLn;
end;
function gas_regnum_search(const s:string):Tnewregister;
{Searches the register number that belongs to the register in s.
s must be in uppercase!.}
var i,p:byte;
begin
{Binary search.}
p:=0;
i:=regname_count_bsstart;
while i<>0 do
begin
if (p+i<regname_count) and (upper(gas_regname2regnum[p+i].name)<=s) then
p:=p+i;
i:=i shr 1;
end;
if upper(gas_regname2regnum[p].name)=s then
gas_regnum_search:=gas_regname2regnum[p].number
else
gas_regnum_search:=NR_NO;
end;
{*****************************************************************************
Initialize
*****************************************************************************}
const
{$ifdef x86_64}
as_x86_64_as_info : tasminfo =
(
id : as_x86_64_as;
idtxt : 'AS';
asmbin : 'as';
asmcmd : '-o $OBJ $ASM';
supported_target : system_any;
outputbinary: false;
allowdirect : true;
needar : true;
labelprefix_only_inside_procedure : false;
labelprefix : '.L';
comment : '# ';
secnames : ('',
'.text','.data','.bss',
'','','','','','',
'.stab','.stabstr','COMMON')
);
{$else x86_64}
as_i386_as_info : tasminfo =
(
id : as_gas;
idtxt : 'AS';
asmbin : 'as';
asmcmd : '-o $OBJ $ASM';
supported_target : system_any;
outputbinary: false;
allowdirect : true;
needar : true;
labelprefix_only_inside_procedure : false;
labelprefix : '.L';
comment : '# ';
secnames : ('',
'.text','.data','.bss',
'','','','','','',
'.stab','.stabstr','COMMON')
);
as_i386_as_aout_info : tasminfo =
(
id : as_i386_as_aout;
idtxt : 'AS_AOUT';
asmbin : 'as';
asmcmd : '-o $OBJ $ASM';
supported_target : system_any;
{ supported_target : system_i386_emx;}
outputbinary: false;
allowdirect : true;
needar : true;
labelprefix_only_inside_procedure : false;
labelprefix : 'L';
comment : '# ';
secnames : ('',
'.text','.data','.bss',
'','','','','','',
'.stab','.stabstr','COMMON')
);
as_i386_asw_info : tasminfo =
(
id : as_i386_asw;
idtxt : 'ASW';
asmbin : 'asw';
asmcmd : '-o $OBJ $ASM';
supported_target : system_i386_win32;
outputbinary: false;
allowdirect : true;
needar : true;
labelprefix_only_inside_procedure : false;
labelprefix : '.L';
comment : '# ';
secnames : ('',
'.text','.data','.section .bss',
'.section .idata$2','.section .idata$4','.section .idata$5',
'.section .idata$6','.section .idata$7','.section .edata',
'.stab','.stabstr','COMMON')
);
{$endif x86_64}
initialization
{$ifdef x86_64}
RegisterAssembler(as_x86_64_as_info,Tx86ATTAssembler);
{$else x86_64}
RegisterAssembler(as_i386_as_info,Tx86ATTAssembler);
RegisterAssembler(as_i386_as_aout_info,Tx86ATTAssembler);
RegisterAssembler(as_i386_asw_info,Tx86ATTAssembler);
{$endif x86_64}
end.
{
$Log$
Revision 1.3 2003-05-28 23:18:31 florian
* started to fix and clean up the sparc port
Revision 1.2 2003/05/22 21:33:31 peter
* removed some unit dependencies
Revision 1.1 2003/04/25 12:04:31 florian
* merged agx64att and ag386att to x86/agx86att
Revision 1.31 2003/03/23 23:33:10 hajny
+ emx target added
Revision 1.30 2003/02/19 22:00:15 daniel
* Code generator converted to new register notation
- Horribily outdated todo.txt removed
Revision 1.29 2003/01/08 18:43:57 daniel
* Tregister changed into a record
Revision 1.28 2003/01/05 13:36:53 florian
* x86-64 compiles
+ very basic support for float128 type (x86-64 only)
Revision 1.27 2002/12/24 18:10:34 peter
* Long symbol names support
Revision 1.26 2002/08/12 15:08:40 carl
+ stab register indexes for powerpc (moved from gdb to cpubase)
+ tprocessor enumeration moved to cpuinfo
+ linker in target_info is now a class
* many many updates for m68k (will soon start to compile)
- removed some ifdef or correct them for correct cpu
Revision 1.25 2002/07/26 21:15:42 florian
* rewrote the system handling
Revision 1.24 2002/07/07 09:52:33 florian
* powerpc target fixed, very simple units can be compiled
* some basic stuff for better callparanode handling, far from being finished
Revision 1.23 2002/07/01 18:46:29 peter
* internal linker
* reorganized aasm layer
Revision 1.22 2002/05/18 13:34:21 peter
* readded missing revisions
Revision 1.21 2002/05/16 19:46:49 carl
+ defines.inc -> fpcdefs.inc to avoid conflicts if compiling by hand
+ try to fix temp allocation (still in ifdef)
+ generic constructor calls
+ start of tassembler / tmodulebase class cleanup
Revision 1.19 2002/05/12 16:53:16 peter
* moved entry and exitcode to ncgutil and cgobj
* foreach gets extra argument for passing local data to the
iterator function
* -CR checks also class typecasts at runtime by changing them
into as
* fixed compiler to cycle with the -CR option
* fixed stabs with elf writer, finally the global variables can
be watched
* removed a lot of routines from cga unit and replaced them by
calls to cgobj
* u32bit-s32bit updates for and,or,xor nodes. When one element is
u32bit then the other is typecasted also to u32bit without giving
a rangecheck warning/error.
* fixed pascal calling method with reversing also the high tree in
the parast, detected by tcalcst3 test
Revision 1.18 2002/04/15 19:12:10 carl
+ target_info.size_of_pointer -> pointer_size
+ some cleanup of unused types/variables
* move several constants from cpubase to their specific units
(where they are used)
+ att_Reg2str -> gas_reg2str
+ int_reg2str -> std_reg2str
Revision 1.17 2002/04/14 16:58:04 carl
+ move into aggas most of the stuff non-processor specific
Revision 1.16 2002/04/10 08:07:55 jonas
* fix for the ie9999 under Linux (patch from Peter)
Revision 1.15 2002/04/04 19:06:06 peter
* removed unused units
* use tlocation.size in cg.a_*loc*() routines
Revision 1.14 2002/04/04 18:26:55 carl
+ added wdosx patch from Pavel
Revision 1.13 2002/04/02 17:11:33 peter
* tlocation,treference update
* LOC_CONSTANT added for better constant handling
* secondadd splitted in multiple routines
* location_force_reg added for loading a location to a register
of a specified size
* secondassignment parses now first the right and then the left node
(this is compatible with Kylix). This saves a lot of push/pop especially
with string operations
* adapted some routines to use the new cg methods
}
Reference in New Issue View Git Blame Copy Permalink