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fpc/compiler/i386/n386mem.pas

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{
$Id$
Copyright (c) 1998-2002 by Florian Klaempfl
Generate i386 assembler for in memory related 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 n386mem;
{$i fpcdefs.inc}
interface
uses
cgbase,cpuinfo,cpubase,
node,nmem,ncgmem;
type
ti386addrnode = class(tcgaddrnode)
procedure pass_2;override;
end;
ti386derefnode = class(tcgderefnode)
procedure pass_2;override;
end;
ti386vecnode = class(tcgvecnode)
procedure update_reference_reg_mul(reg:tregister;l:aword);override;
procedure pass_2;override;
end;
implementation
uses
{$ifdef delphi}
sysutils,
{$endif}
systems,
cutils,verbose,
symdef,paramgr,
aasmtai,
nld,ncon,nadd,
cgobj;
{*****************************************************************************
TI386ADDRNODE
*****************************************************************************}
procedure ti386addrnode.pass_2;
begin
inherited pass_2;
{ for use of other segments }
if left.location.reference.segment<>NR_NO then
location.segment:=left.location.reference.segment;
end;
{*****************************************************************************
TI386DEREFNODE
*****************************************************************************}
procedure ti386derefnode.pass_2;
begin
inherited pass_2;
if tpointerdef(left.resulttype.def).is_far then
location.reference.segment:=NR_FS;
end;
{*****************************************************************************
TI386VECNODE
*****************************************************************************}
procedure ti386vecnode.update_reference_reg_mul(reg:tregister;l:aword);
var
l2 : integer;
hreg : tregister;
begin
{ Optimized for x86 to use the index register and scalefactor }
if location.reference.index=NR_NO then
begin
{ no preparations needed }
end
else if location.reference.base=NR_NO then
begin
case location.reference.scalefactor of
2 : cg.a_op_const_reg(exprasmlist,OP_SHL,OS_ADDR,1,location.reference.index);
4 : cg.a_op_const_reg(exprasmlist,OP_SHL,OS_ADDR,2,location.reference.index);
8 : cg.a_op_const_reg(exprasmlist,OP_SHL,OS_ADDR,3,location.reference.index);
end;
location.reference.base:=location.reference.index;
end
else
begin
cg.ungetreference(exprasmlist,location.reference);
hreg := cg.getaddressregister(exprasmlist);
cg.a_loadaddr_ref_reg(exprasmlist,location.reference,hreg);
reference_reset_base(location.reference,hreg,0);
end;
{ insert the new index register and scalefactor or
do the multiplication manual }
case l of
1,2,4,8 : location.reference.scalefactor:=l;
else
begin
if ispowerof2(l,l2) then
cg.a_op_const_reg(exprasmlist,OP_SHL,OS_ADDR,l2,reg)
else
cg.a_op_const_reg(exprasmlist,OP_IMUL,OS_ADDR,l,reg);
end;
end;
location.reference.index:=reg;
end;
procedure ti386vecnode.pass_2;
begin
inherited pass_2;
if nf_memseg in flags then
location.reference.segment:=NR_FS;
end;
begin
caddrnode:=ti386addrnode;
cderefnode:=ti386derefnode;
cvecnode:=ti386vecnode;
end.
{
$Log$
Revision 1.59 2003-10-21 15:13:27 peter
* fix vecnode code that caused to much register conflicts
Revision 1.58 2003/10/10 17:48:14 peter
* old trgobj moved to x86/rgcpu and renamed to trgx86fpu
* tregisteralloctor renamed to trgobj
* removed rgobj from a lot of units
* moved location_* and reference_* to cgobj
* first things for mmx register allocation
Revision 1.57 2003/10/09 21:31:37 daniel
* Register allocator splitted, ans abstract now
Revision 1.56 2003/10/01 20:34:49 peter
* procinfo unit contains tprocinfo
* cginfo renamed to cgbase
* moved cgmessage to verbose
* fixed ppc and sparc compiles
Revision 1.55 2003/09/29 20:58:56 peter
* optimized releasing of registers
Revision 1.54 2003/09/03 15:55:01 peter
* NEWRA branch merged
Revision 1.53.2.2 2003/08/31 15:46:26 peter
* more updates for tregister
Revision 1.53.2.1 2003/08/29 17:29:00 peter
* next batch of updates
Revision 1.53 2003/06/01 21:38:06 peter
* getregisterfpu size parameter added
* op_const_reg size parameter added
* sparc updates
Revision 1.52 2003/04/22 14:33:38 peter
* removed some notes/hints
Revision 1.51 2003/03/28 19:16:57 peter
* generic constructor working for i386
* remove fixed self register
* esi added as address register for i386
Revision 1.50 2003/02/19 22:00:15 daniel
* Code generator converted to new register notation
- Horribily outdated todo.txt removed
Revision 1.49 2003/01/13 18:37:44 daniel
* Work on register conversion
Revision 1.48 2003/01/08 18:43:57 daniel
* Tregister changed into a record
Revision 1.47 2002/12/03 22:14:12 carl
+ use FPC_CHECKPOINTER once again
Revision 1.46 2002/11/25 17:43:27 peter
* splitted defbase in defutil,symutil,defcmp
* merged isconvertable and is_equal into compare_defs(_ext)
* made operator search faster by walking the list only once
Revision 1.45 2002/11/23 22:50:09 carl
* some small speed optimizations
+ added several new warnings/hints
Revision 1.44 2002/09/07 15:25:11 peter
* old logs removed and tabs fixed
Revision 1.43 2002/09/01 19:27:35 peter
* use index register when available for generating a reference with
only a signle register. Using the base register could possibly
destroy the framepointer
Revision 1.42 2002/09/01 18:46:01 peter
* fixed generic tcgvecnode
* move code that updates a reference with index register and multiplier
to separate method so it can be overriden for scaled indexing
* i386 uses generic tcgvecnode
Revision 1.41 2002/08/11 14:32:30 peter
* renamed current_library to objectlibrary
Revision 1.40 2002/08/11 13:24:17 peter
* saving of asmsymbols in ppu supported
* asmsymbollist global is removed and moved into a new class
tasmlibrarydata that will hold the info of a .a file which
corresponds with a single module. Added librarydata to tmodule
to keep the library info stored for the module. In the future the
objectfiles will also be stored to the tasmlibrarydata class
* all getlabel/newasmsymbol and friends are moved to the new class
Revision 1.39 2002/07/28 21:34:31 florian
* more powerpc fixes
+ dummy tcgvecnode
Revision 1.38 2002/07/20 11:58:04 florian
* types.pas renamed to defbase.pas because D6 contains a types
unit so this would conflicts if D6 programms are compiled
+ Willamette/SSE2 instructions to assembler added
Revision 1.37 2002/07/11 14:41:33 florian
* start of the new generic parameter handling
Revision 1.36 2002/07/07 09:52:34 florian
* powerpc target fixed, very simple units can be compiled
* some basic stuff for better callparanode handling, far from being finished
Revision 1.35 2002/07/01 18:46:33 peter
* internal linker
* reorganized aasm layer
Revision 1.34 2002/06/24 12:43:01 jonas
* fixed errors found with new -CR code from Peter when cycling with -O2p3r
Revision 1.33 2002/05/18 13:34:25 peter
* readded missing revisions
Revision 1.32 2002/05/16 19:46:51 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 1.30 2002/05/13 19:54:38 peter
* removed n386ld and n386util units
* maybe_save/maybe_restore added instead of the old maybe_push
Revision 1.29 2002/05/12 16:53:17 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 1.28 2002/04/21 19:02:07 peter
* removed newn and disposen nodes, the code is now directly
inlined from pexpr
* -an option that will write the secondpass nodes to the .s file, this
requires EXTDEBUG define to actually write the info
* fixed various internal errors and crashes due recent code changes
Revision 1.27 2002/04/20 21:37:07 carl
+ generic FPC_CHECKPOINTER
+ first parameter offset in stack now portable
* rename some constants
+ move some cpu stuff to other units
- remove unused constents
* fix stacksize for some targets
* fix generic size problems which depend now on EXTEND_SIZE constant
* removing frame pointer in routines is only available for : i386,m68k and vis targets
Revision 1.26 2002/04/19 15:39:35 peter
* removed some more routines from cga
* moved location_force_reg/mem to ncgutil
* moved arrayconstructnode secondpass to ncgld
Revision 1.25 2002/04/15 19:12:09 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 1.24 2002/04/04 19:06:12 peter
* removed unused units
* use tlocation.size in cg.a_*loc*() routines
Revision 1.23 2002/04/02 17:11:36 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
}
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