{
$Id: nppccnv.pas,v 1.49 2003/12/31 22:30:39 jonas Exp $
Copyright (c) 1998-2002 by Florian Klaempfl
Generate PowerPC 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 nppccnv;
{$i fpcdefs.inc}
interface
uses
node,ncnv,ncgcnv,defcmp;
type
tppctypeconvnode = class(tcgtypeconvnode)
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; }
function first_int_to_real: tnode; override;
{ procedure second_pointer_to_array;override; }
{ procedure second_chararray_to_string;override; }
{ procedure second_char_to_string;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,globals,systems,
symconst,symdef,aasmbase,aasmtai,
defutil,
cgbase,pass_1,pass_2,
ncon,ncal,
ncgutil,
cpubase,aasmcpu,
rgobj,tgobj,cgobj;
{*****************************************************************************
FirstTypeConv
*****************************************************************************}
function tppctypeconvnode.first_int_to_real: tnode;
var
fname: string[19];
begin
{ converting a 64bit integer to a float requires a helper }
if is_64bitint(left.resulttype.def) or
is_currency(left.resulttype.def) then
begin
{ hack to avoid double division by 10000, as it's }
{ already done by resulttypepass.resulttype_int_to_real }
if is_currency(left.resulttype.def) then
left.resulttype := cs64bittype;
if is_signed(left.resulttype.def) then
fname := 'fpc_int64_to_double'
else
fname := 'fpc_qword_to_double';
result := ccallnode.createintern(fname,ccallparanode.create(
left,nil));
left:=nil;
firstpass(result);
exit;
end
else
{ other integers are supposed to be 32 bit }
begin
if is_signed(left.resulttype.def) then
inserttypeconv(left,s32bittype)
else
inserttypeconv(left,u32bittype);
firstpass(left);
end;
result := nil;
if registersfpu<1 then
registersfpu:=1;
expectloc:=LOC_FPUREGISTER;
end;
{*****************************************************************************
SecondTypeConv
*****************************************************************************}
procedure tppctypeconvnode.second_int_to_real;
type
tdummyarray = packed array[0..7] of byte;
{$ifdef VER1_0}
var
dummy1, dummy2: int64;
{$else VER1_0}
const
dummy1: int64 = $4330000080000000;
dummy2: int64 = $4330000000000000;
{$endif VER1_0}
var
tempconst: trealconstnode;
ref: treference;
valuereg, tempreg, leftreg, tmpfpureg: tregister;
size: tcgsize;
signed, valuereg_is_scratch: boolean;
begin
{$ifdef VER1_0}
dummy1 := (int64(1) shl 31) or (int64($43300000) shl 32);
dummy2 := int64($43300000) shl 32;
{$endif VER1_0}
valuereg_is_scratch := false;
location_reset(location,LOC_FPUREGISTER,def_cgsize(resulttype.def));
{ the code here comes from the PowerPC Compiler Writer's Guide }
{ * longint to double }
{ addis R0,R0,0x4330 # R0 = 0x43300000 }
{ stw R0,disp(R1) # store upper half }
{ xoris R3,R3,0x8000 # flip sign bit }
{ stw R3,disp+4(R1) # store lower half }
{ lfd FR1,disp(R1) # float load double of value }
{ fsub FR1,FR1,FR2 # subtract 0x4330000080000000 }
{ * cardinal to double }
{ addis R0,R0,0x4330 # R0 = 0x43300000 }
{ stw R0,disp(R1) # store upper half }
{ stw R3,disp+4(R1) # store lower half }
{ lfd FR1,disp(R1) # float load double of value }
{ fsub FR1,FR1,FR2 # subtract 0x4330000000000000 }
tg.Gettemp(exprasmlist,8,tt_normal,ref);
signed := is_signed(left.resulttype.def);
{ we need a certain constant for the conversion, so create it here }
if signed then
tempconst :=
crealconstnode.create(double(tdummyarray(dummy1)),
pbestrealtype^)
else
tempconst :=
crealconstnode.create(double(tdummyarray(dummy2)),
pbestrealtype^);
resulttypepass(tempconst);
firstpass(tempconst);
secondpass(tempconst);
if (tempconst.location.loc <> LOC_CREFERENCE) or
{ has to be handled by a helper }
is_64bitint(left.resulttype.def) then
internalerror(200110011);
case left.location.loc of
LOC_REGISTER:
begin
leftreg := left.location.register;
valuereg := leftreg;
end;
LOC_CREGISTER:
begin
leftreg := left.location.register;
if signed then
begin
valuereg := cg.getintregister(exprasmlist,OS_INT);
valuereg_is_scratch := true;
end
else
valuereg := leftreg;
end;
LOC_REFERENCE,LOC_CREFERENCE:
begin
leftreg := cg.getintregister(exprasmlist,OS_INT);
valuereg := leftreg;
valuereg_is_scratch := true;
if signed then
size := OS_S32
else
size := OS_32;
cg.a_load_ref_reg(exprasmlist,def_cgsize(left.resulttype.def),
size,left.location.reference,leftreg);
end
else
internalerror(200110012);
end;
tempreg := cg.getintregister(exprasmlist,OS_INT);
exprasmlist.concat(taicpu.op_reg_const(A_LIS,tempreg,$4330));
cg.a_load_reg_ref(exprasmlist,OS_32,OS_32,tempreg,ref);
cg.ungetregister(exprasmlist,tempreg);
if signed then
exprasmlist.concat(taicpu.op_reg_reg_const(A_XORIS,valuereg,
{ xoris expects a unsigned 16 bit int (FK) }
leftreg,$8000));
inc(ref.offset,4);
cg.a_load_reg_ref(exprasmlist,OS_32,OS_32,valuereg,ref);
dec(ref.offset,4);
if (valuereg_is_scratch) then
cg.ungetregister(exprasmlist,valuereg);
if (left.location.loc = LOC_REGISTER) or
((left.location.loc = LOC_CREGISTER) and
not signed) then
cg.ungetregister(exprasmlist,leftreg)
else
cg.ungetregister(exprasmlist,valuereg);
tmpfpureg := cg.getfpuregister(exprasmlist,OS_F64);
cg.a_loadfpu_ref_reg(exprasmlist,OS_F64,tempconst.location.reference,
tmpfpureg);
tempconst.free;
location.register := cg.getfpuregister(exprasmlist,OS_F64);
exprasmlist.concat(taicpu.op_reg_ref(A_LFD,location.register,
ref));
tg.ungetiftemp(exprasmlist,ref);
exprasmlist.concat(taicpu.op_reg_reg_reg(A_FSUB,location.register,
location.register,tmpfpureg));
cg.ungetregister(exprasmlist,tmpfpureg);
{ work around bug in some PowerPC processors }
if (tfloatdef(resulttype.def).typ = s32real) then
exprasmlist.concat(taicpu.op_reg_reg(A_FRSP,location.register,
location.register));
end;
procedure tppctypeconvnode.second_real_to_real;
begin
inherited second_real_to_real;
{ work around bug in some powerpc processors where doubles aren't }
{ properly converted to singles }
if (tfloatdef(left.resulttype.def).typ = s64real) and
(tfloatdef(resulttype.def).typ = s32real) then
exprasmlist.concat(taicpu.op_reg_reg(A_FRSP,location.register,
location.register));
end;
procedure tppctypeconvnode.second_int_to_bool;
var
hreg1,
hreg2 : tregister;
href : treference;
resflags : tresflags;
opsize : tcgsize;
hlabel, oldtruelabel, oldfalselabel : tasmlabel;
begin
oldtruelabel:=truelabel;
oldfalselabel:=falselabel;
objectlibrary.getlabel(truelabel);
objectlibrary.getlabel(falselabel);
secondpass(left);
if codegenerror then
exit;
{ byte(boolean) or word(wordbool) or longint(longbool) must }
{ be accepted for var parameters }
if (nf_explicit in flags) and
(left.resulttype.def.size=resulttype.def.size) and
(left.location.loc in [LOC_REFERENCE,LOC_CREFERENCE,LOC_CREGISTER]) then
begin
location_copy(location,left.location);
exit;
end;
location_reset(location,LOC_REGISTER,def_cgsize(resulttype.def));
opsize := def_cgsize(left.resulttype.def);
case left.location.loc of
LOC_CREFERENCE,LOC_REFERENCE,LOC_REGISTER,LOC_CREGISTER :
begin
if left.location.loc in [LOC_CREFERENCE,LOC_REFERENCE] then
begin
reference_release(exprasmlist,left.location.reference);
hreg1:=cg.getintregister(exprasmlist,OS_INT);
if left.location.size in [OS_64,OS_S64] then
begin
cg.a_load_ref_reg(exprasmlist,OS_INT,OS_INT,
left.location.reference,hreg1);
hreg2:=cg.getintregister(exprasmlist,OS_INT);
href:=left.location.reference;
inc(href.offset,4);
cg.a_load_ref_reg(exprasmlist,OS_INT,OS_INT,
href,hreg2);
cg.ungetregister(exprasmlist,hreg2);
cg.a_op_reg_reg_reg(exprasmlist,OP_OR,OS_32,hreg1,hreg2,hreg1);
end
else
cg.a_load_ref_reg(exprasmlist,opsize,opsize,
left.location.reference,hreg1);
end
else
begin
if left.location.size in [OS_64,OS_S64] then
begin
location_release(exprasmlist,left.location);
hreg1:=cg.getintregister(exprasmlist,OS_32);
cg.a_op_reg_reg_reg(exprasmlist,OP_OR,OS_32,left.location.registerhigh,left.location.registerlow,hreg1);
end
else
hreg1 := left.location.register;
end;
hreg2 := cg.getintregister(exprasmlist,OS_INT);
exprasmlist.concat(taicpu.op_reg_reg_const(A_SUBIC,hreg2,
hreg1,1));
cg.ungetregister(exprasmlist,hreg2);
exprasmlist.concat(taicpu.op_reg_reg_reg(A_SUBFE,hreg1,hreg2,
hreg1));
end;
LOC_FLAGS :
begin
hreg1:=cg.getintregister(exprasmlist,OS_INT);
resflags:=left.location.resflags;
cg.g_flags2reg(exprasmlist,location.size,resflags,hreg1);
end;
LOC_JUMP :
begin
hreg1:=cg.getintregister(exprasmlist,OS_INT);
objectlibrary.getlabel(hlabel);
cg.a_label(exprasmlist,truelabel);
cg.a_load_const_reg(exprasmlist,OS_INT,1,hreg1);
cg.a_jmp_always(exprasmlist,hlabel);
cg.a_label(exprasmlist,falselabel);
cg.a_load_const_reg(exprasmlist,OS_INT,0,hreg1);
cg.a_label(exprasmlist,hlabel);
cg.ungetregister(exprasmlist,hreg1);
end;
else
internalerror(10062);
end;
location.register := hreg1;
truelabel:=oldtruelabel;
falselabel:=oldfalselabel;
end;
begin
ctypeconvnode:=tppctypeconvnode;
end.
{
$Log: nppccnv.pas,v $
Revision 1.49 2003/12/31 22:30:39 jonas
* fixed currency bugs. Int64 currency handling still needs to be
rewritten so that it doesn't include conversions to real anymore
though
Revision 1.48 2003/12/07 11:21:05 jonas
* finally fixed int->bool conversion properly
Revision 1.47 2003/12/04 20:37:02 jonas
* fixed some int<->boolean type conversion issues
Revision 1.46 2003/11/29 16:27:19 jonas
* fixed several ppc assembler reader related problems
* local vars in assembler procedures now start at offset 4
* fixed second_int_to_bool (apparently an integer can be in LOC_JUMP??)
Revision 1.45 2003/11/04 22:30:15 florian
+ type cast variant<->enum
* cnv. node second pass uses now as well helper wrappers
Revision 1.44 2003/10/17 01:22:08 florian
* compilation of the powerpc compiler fixed
Revision 1.43 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 1.42 2003/09/03 19:35:24 peter
* powerpc compiles again
Revision 1.41 2003/08/09 15:28:29 jonas
* fixed conversion from signed value to floats if the compiler is
compiled with a 1.0.x compiler
Revision 1.40 2003/06/14 22:32:43 jonas
* ppc compiles with -dnewra, haven't tried to compile anything with it
yet though
Revision 1.39 2003/06/12 22:09:54 jonas
* tcginnode.pass_2 doesn't call a helper anymore in any case
* fixed ungetregisterfpu compilation problems
Revision 1.38 2003/06/04 11:58:58 jonas
* calculate localsize also in g_return_from_proc since it's now called
before g_stackframe_entry (still have to fix macos)
* compilation fixes (cycle doesn't work yet though)
Revision 1.37 2003/06/01 21:38:06 peter
* getregisterfpu size parameter added
* op_const_reg size parameter added
* sparc updates
Revision 1.36 2003/05/11 20:42:08 jonas
* fixed bug in second_int_to_bool I introduced previous time
(secondpass was being called twice!)
Revision 1.35 2003/05/11 13:06:44 jonas
* fixed second_int_to_bool() (but still problem with typecasts used for
var parameters, not sure about solution)
Revision 1.34 2003/05/02 15:13:38 jonas
* yet another final fix for second_int_to_real() :) (tested this time)
Revision 1.33 2003/04/24 22:29:58 florian
* fixed a lot of PowerPC related stuff
Revision 1.32 2003/04/23 21:10:54 peter
* fix compile for ppc,sparc,m68k
Revision 1.31 2003/04/23 12:35:35 florian
* fixed several issues with powerpc
+ applied a patch from Jonas for nested function calls (PowerPC only)
* ...
Revision 1.30 2003/03/11 21:46:24 jonas
* lots of new regallocator fixes, both in generic and ppc-specific code
(ppc compiler still can't compile the linux system unit though)
Revision 1.29 2003/02/19 22:00:16 daniel
* Code generator converted to new register notation
- Horribily outdated todo.txt removed
Revision 1.28 2002/12/05 14:28:13 florian
* some variant <-> dyn. array stuff
Revision 1.27 2002/11/25 17:43:28 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 1.26 2002/10/18 16:38:42 jonas
+ added entry for pwchar_to_string conversion addition
Revision 1.25 2002/09/17 18:54:06 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 1.24 2002/08/23 16:14:50 peter
* tempgen cleanup
* tt_noreuse temp type added that will be used in genentrycode
Revision 1.23 2002/08/18 10:34:30 florian
* more ppc assembling fixes
Revision 1.22 2002/08/14 19:30:42 carl
+ added fixing because first_in_to_real is now completely generic
Revision 1.21 2002/08/11 06:14:41 florian
* fixed powerpc compilation problems
Revision 1.20 2002/08/10 17:15:31 jonas
* various fixes and optimizations
Revision 1.19 2002/07/29 21:23:44 florian
* more fixes for the ppc
+ wrappers for the tcnvnode.first_* stuff introduced
Revision 1.18 2002/07/29 09:20:20 jonas
+ second_int_to_int implementation which is almost the same as the
generic implementation, but it avoids some unnecessary type conversions
Revision 1.17 2002/07/27 19:55:15 jonas
+ generic implementation of tcg.g_flags2ref()
* tcg.flags2xxx() now also needs a size parameter
Revision 1.16 2002/07/24 14:38:00 florian
* small typo fixed, compiles with 1.0.x again
Revision 1.15 2002/07/21 16:57:22 jonas
* hopefully final fix for second_int_to_real()
Revision 1.14 2002/07/20 11:58:05 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 1.13 2002/07/13 06:49:39 jonas
* fixed fpu constants in second_int_to_real (fpu values are also stored
in big endian)
Revision 1.12 2002/07/12 22:02:22 florian
* fixed to compile with 1.1
Revision 1.11 2002/07/11 14:41:34 florian
* start of the new generic parameter handling
Revision 1.10 2002/07/11 07:42:31 jonas
* fixed nppccnv and enabled it
- removed PPC specific second_int_to_int and use the generic one instead
Revision 1.9 2002/05/20 13:30:42 carl
* bugfix of hdisponen (base must be set, not index)
* more portability fixes
Revision 1.8 2002/05/18 13:34:26 peter
* readded missing revisions
Revision 1.7 2002/05/16 19:46:53 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 1.5 2002/04/06 18:13:02 jonas
* several powerpc-related additions and fixes
}
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