{
$Id: n386cnv.pas,v 1.71 2003/12/22 23:08:59 peter Exp $
Copyright (c) 1998-2002 by Florian Klaempfl
Generate i386 assembler for type converting 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 n386cnv;
{$i fpcdefs.inc}
interface
uses
node,ncgcnv,defutil,defcmp,nx86cnv;
type
ti386typeconvnode = class(tx86typeconvnode)
protected
{ procedure second_int_to_int;override; }
{ procedure second_string_to_string;override; }
{ procedure second_cstring_to_pchar;override; }
{ procedure second_string_to_chararray;override; }
{ procedure second_array_to_pointer;override; }
{ procedure second_pointer_to_array;override; }
{ procedure second_chararray_to_string;override; }
{ procedure second_char_to_string;override; }
function first_int_to_real: tnode; override;
procedure second_int_to_real;override;
{ procedure second_real_to_real;override; }
{ procedure second_cord_to_pointer;override; }
{ procedure second_proc_to_procvar;override; }
{ procedure second_bool_to_int;override; }
{ procedure second_int_to_bool;override; }
{ procedure second_load_smallset;override; }
{ procedure second_ansistring_to_pchar;override; }
{ procedure second_pchar_to_string;override; }
{ procedure second_class_to_intf;override; }
{ procedure second_char_to_char;override; }
end;
implementation
uses
verbose,systems,
symconst,symdef,aasmbase,aasmtai,aasmcpu,
cgbase,
ncon,ncal,ncnv,
cpubase,tgobj,
cgobj,cga,cgx86,ncgutil;
function ti386typeconvnode.first_int_to_real : tnode;
begin
first_int_to_real:=nil;
if registersfpu<1 then
registersfpu:=1;
expectloc:=LOC_FPUREGISTER;
end;
procedure ti386typeconvnode.second_int_to_real;
var
href : treference;
hregister : tregister;
l1,l2 : tasmlabel;
begin
location_reset(location,LOC_FPUREGISTER,def_cgsize(resulttype.def));
{ We need to load from a reference }
location_force_mem(exprasmlist,left.location);
{ For u32bit we need to load it as comp and need to
make it 64bits }
if (torddef(left.resulttype.def).typ=u32bit) then
begin
tg.GetTemp(exprasmlist,8,tt_normal,href);
location_release(exprasmlist,left.location);
location_freetemp(exprasmlist,left.location);
cg.a_load_ref_ref(exprasmlist,left.location.size,OS_32,left.location.reference,href);
inc(href.offset,4);
cg.a_load_const_ref(exprasmlist,OS_32,0,href);
dec(href.offset,4);
left.location.reference:=href;
end;
{ Load from reference to fpu reg }
location_release(exprasmlist,left.location);
case torddef(left.resulttype.def).typ of
u32bit,
scurrency,
s64bit:
exprasmlist.concat(taicpu.op_ref(A_FILD,S_IQ,left.location.reference));
u64bit:
begin
{ unsigned 64 bit ints are harder to handle: }
{ we load bits 0..62 and then check bit 63: }
{ if it is 1 then we add $80000000 000000000 }
{ as double }
inc(left.location.reference.offset,4);
hregister:=cg.getintregister(exprasmlist,OS_32);
cg.a_load_ref_reg(exprasmlist,OS_INT,OS_INT,left.location.reference,hregister);
emit_const_ref(A_AND,S_L,$7fffffff,left.location.reference);
emit_const_reg(A_TEST,S_L,longint($80000000),hregister);
cg.ungetregister(exprasmlist,hregister);
dec(left.location.reference.offset,4);
exprasmlist.concat(taicpu.op_ref(A_FILD,S_IQ,left.location.reference));
objectlibrary.getdatalabel(l1);
objectlibrary.getlabel(l2);
cg.a_jmp_flags(exprasmlist,F_E,l2);
Consts.concat(Tai_label.Create(l1));
{ I got this constant from a test progtram (FK) }
Consts.concat(Tai_const.Create_32bit(0));
Consts.concat(Tai_const.Create_32bit(1138753536));
reference_reset_symbol(href,l1,0);
emit_ref(A_FADD,S_FL,href);
cg.a_label(exprasmlist,l2);
end
else
begin
if left.resulttype.def.size<4 then
begin
tg.GetTemp(exprasmlist,4,tt_normal,href);
location_freetemp(exprasmlist,left.location);
cg.a_load_ref_ref(exprasmlist,left.location.size,OS_32,left.location.reference,href);
left.location.reference:=href;
end;
exprasmlist.concat(taicpu.op_ref(A_FILD,S_IL,left.location.reference));
end;
end;
location_freetemp(exprasmlist,left.location);
tcgx86(cg).inc_fpu_stack;
location.register:=NR_ST;
end;
begin
ctypeconvnode:=ti386typeconvnode;
end.
{
$Log: n386cnv.pas,v $
Revision 1.71 2003/12/22 23:08:59 peter
* removed unused checkobject method
Revision 1.70 2003/12/08 15:35:00 peter
* fix loading of word/byte to real
Revision 1.69 2003/12/03 23:13:20 peter
* delayed paraloc allocation, a_param_*() gets extra parameter
if it needs to allocate temp or real paralocation
* optimized/simplified int-real loading
Revision 1.68 2003/11/04 22:30:15 florian
+ type cast variant<->enum
* cnv. node second pass uses now as well helper wrappers
Revision 1.67 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 1.66 2003/10/09 21:31:37 daniel
* Register allocator splitted, ans abstract now
Revision 1.65 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 1.64 2003/09/28 21:48:20 peter
* fix register leaks
Revision 1.63 2003/09/03 15:55:01 peter
* NEWRA branch merged
Revision 1.62.2.2 2003/08/31 15:46:26 peter
* more updates for tregister
Revision 1.62.2.1 2003/08/31 13:58:46 daniel
* Some more work to make things compile
Revision 1.62 2003/06/03 21:11:09 peter
* cg.a_load_* get a from and to size specifier
* makeregsize only accepts newregister
* i386 uses generic tcgnotnode,tcgunaryminus
Revision 1.61 2003/04/30 20:53:32 florian
* error when address of an abstract method is taken
* fixed some x86-64 problems
* merged some more x86-64 and i386 code
Revision 1.60 2003/04/23 20:16:04 peter
+ added currency support based on int64
+ is_64bit for use in cg units instead of is_64bitint
* removed cgmessage from n386add, replace with internalerrors
Revision 1.59 2003/04/22 23:50:23 peter
* firstpass uses expectloc
* checks if there are differences between the expectloc and
location.loc from secondpass in EXTDEBUG
Revision 1.58 2003/04/22 10:09:35 daniel
+ Implemented the actual register allocator
+ Scratch registers unavailable when new register allocator used
+ maybe_save/maybe_restore unavailable when new register allocator used
Revision 1.57 2003/03/13 19:52:23 jonas
* and more new register allocator fixes (in the i386 code generator this
time). At least now the ppc cross compiler can compile the linux
system unit again, but I haven't tested it.
Revision 1.56 2003/02/19 22:00:15 daniel
* Code generator converted to new register notation
- Horribily outdated todo.txt removed
Revision 1.55 2003/01/13 18:37:44 daniel
* Work on register conversion
Revision 1.54 2003/01/08 18:43:57 daniel
* Tregister changed into a record
Revision 1.53 2002/12/05 14:27:42 florian
* some variant <-> dyn. array stuff
Revision 1.52 2002/11/25 17:43:26 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 1.51 2002/10/10 16:14:54 florian
* fixed to reflect last tconvtype change
Revision 1.50 2002/10/05 12:43:29 carl
* fixes for Delphi 6 compilation
(warning : Some features do not work under Delphi)
Revision 1.49 2002/09/17 18:54:03 jonas
* a_load_reg_reg() now has two size parameters: source and dest. This
allows some optimizations on architectures that don't encode the
register size in the register name.
Revision 1.48 2002/08/14 19:19:14 carl
* first_int_to_real moved to i386 (other one is generic)
Revision 1.47 2002/08/11 14:32:30 peter
* renamed current_library to objectlibrary
Revision 1.46 2002/08/11 13:24:16 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 1.45 2002/07/27 19:53:51 jonas
+ generic implementation of tcg.g_flags2ref()
* tcg.flags2xxx() now also needs a size parameter
Revision 1.44 2002/07/20 11:58:01 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 1.43 2002/07/01 18:46:31 peter
* internal linker
* reorganized aasm layer
Revision 1.42 2002/05/20 13:30:40 carl
* bugfix of hdisponen (base must be set, not index)
* more portability fixes
Revision 1.41 2002/05/18 13:34:24 peter
* readded missing revisions
Revision 1.40 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 1.38 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 1.37 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 1.36 2002/04/21 15:35:23 carl
* changeregsize -> rg.makeregsize
Revision 1.35 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 1.34 2002/04/15 19:44:21 peter
* fixed stackcheck that would be called recursively when a stack
error was found
* generic changeregsize(reg,size) for i386 register resizing
* removed some more routines from cga unit
* fixed returnvalue handling
* fixed default stacksize of linux and go32v2, 8kb was a bit small :-)
Revision 1.33 2002/04/04 19:06:10 peter
* removed unused units
* use tlocation.size in cg.a_*loc*() routines
Revision 1.32 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
Revision 1.31 2002/03/31 20:26:38 jonas
+ a_loadfpu_* and a_loadmm_* methods in tcg
* register allocation is now handled by a class and is mostly processor
independent (+rgobj.pas and i386/rgcpu.pas)
* temp allocation is now handled by a class (+tgobj.pas, -i386\tgcpu.pas)
* some small improvements and fixes to the optimizer
* some register allocation fixes
* some fpuvaroffset fixes in the unary minus node
* push/popusedregisters is now called rg.save/restoreusedregisters and
(for i386) uses temps instead of push/pop's when using -Op3 (that code is
also better optimizable)
* fixed and optimized register saving/restoring for new/dispose nodes
* LOC_FPU locations now also require their "register" field to be set to
R_ST, not R_ST0 (the latter is used for LOC_CFPUREGISTER locations only)
- list field removed of the tnode class because it's not used currently
and can cause hard-to-find bugs
Revision 1.30 2002/03/04 19:10:13 peter
* removed compiler warnings
}
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