mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-06-22 08:58:52 +02:00
394 lines
14 KiB
ObjectPascal
394 lines
14 KiB
ObjectPascal
{
|
|
$Id$
|
|
Copyright (c) 1998-2000 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 n386cnv;
|
|
|
|
{$i defines.inc}
|
|
|
|
interface
|
|
|
|
uses
|
|
node,ncnv,ncgcnv,types;
|
|
|
|
type
|
|
tppctypeconvnode = class(tcgtypeconvnode)
|
|
protected
|
|
function first_int_to_int: tnode; override;
|
|
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; }
|
|
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; }
|
|
procedure pass_2;override;
|
|
procedure second_call_helper(c : tconverttype);
|
|
end;
|
|
|
|
implementation
|
|
|
|
uses
|
|
verbose,globals,systems,
|
|
symconst,symdef,aasm,
|
|
cgbase,temp_gen,pass_2,
|
|
ncon,ncal,
|
|
cpubase,cpuasm,
|
|
cga,tgcpu;
|
|
|
|
|
|
{*****************************************************************************
|
|
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) then
|
|
begin
|
|
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));
|
|
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 := inherited first_int_to_real;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondTypeConv
|
|
*****************************************************************************}
|
|
|
|
|
|
procedure tppctypeconvnode.second_int_to_int;
|
|
var
|
|
fromsize,
|
|
tosize : longint;
|
|
opsize,
|
|
tempsize : tcgsize;
|
|
|
|
begin
|
|
{ insert range check if not explicit conversion }
|
|
if not(nf_explizit in flags) then
|
|
emitrangecheck(left,resulttype.def);
|
|
|
|
fromsize := left.resulttype.def.size;
|
|
tosize := resulttype.def.size
|
|
{ is the result size smaller ? }
|
|
if tosize < fromsize then
|
|
begin
|
|
opsize := def_cgsize(resulttype.def);
|
|
case left.location.loc of
|
|
LOC_REGISTER,LOC_CREGISTER:
|
|
begin
|
|
if location = LOC_REGISTER then
|
|
location.register:= left.location.register
|
|
else
|
|
location.register := getregister32;
|
|
case opsize of
|
|
OS_8:
|
|
exprasmlist.concat(taicpu.op_reg_reg_const_const_const(
|
|
A_RLWINM,location.register,left.location.register,
|
|
0,24,31));
|
|
OS_S8:
|
|
exprasmlist.concat(taicpu.op_reg_reg(A_EXTSB,
|
|
location.register,left.location.register));
|
|
OS_16:
|
|
exprasmlist.concat(taicpu.op_reg_reg_const_const_const(
|
|
A_RLWINM,location.register,left.location.register,
|
|
0,16,31));
|
|
OS_S16:
|
|
exprasmlist.concat(taicpu.op_reg_reg(A_EXTSH,
|
|
location.register,left.location.register));
|
|
else
|
|
begin
|
|
if location.register <> left.location.register then
|
|
exprasmlist.concat(taicpu.op_reg_reg(A_MR,
|
|
location.register,left.location.register));
|
|
{ we can release the upper register }
|
|
if opsize in [OS_64,OS_S64] then
|
|
ungetregister(left.location.registerhigh);
|
|
end;
|
|
end;
|
|
end;
|
|
LOC_REFERENCE,LOC_MEM:
|
|
begin
|
|
set_location(location,left.location);
|
|
increfofs(location.reference,fromsize-tosize);
|
|
end;
|
|
end;
|
|
end
|
|
{ is the result size bigger ? }
|
|
else if resulttype.def.size>left.resulttype.def.size then
|
|
begin
|
|
opsize := def_cgsize(fromsize);
|
|
location.loc := LOC_REGISTER;
|
|
case left.location.loc of
|
|
LOC_REFERENCE,LOC_MEM:
|
|
begin
|
|
del_reference(left.location.reference);
|
|
location.register := getregister32;
|
|
if not (opsize in [OS_64,OS_S64]) then
|
|
tempsize := pred(opsize)
|
|
else
|
|
tempsize := opsize;
|
|
{ this one takes care of the necessary sign extensions }
|
|
cg.a_load_ref_reg(exprasmlist,tempsize,
|
|
left.location.reference,location.register);
|
|
ungetiftemp(left.location.reference);
|
|
end;
|
|
LOC_CREGISTER:
|
|
{ since we only have 32bit registers and everything is }
|
|
{ always loaded with sign-extending or zeroeing }
|
|
{ instructions as appropriate, the source will contain }
|
|
{ the correct value already, so simply copy it }
|
|
begin
|
|
location.register := getregister32;
|
|
exprasmlist.concat(taicpu.op_reg_reg(A_MR,location.register,
|
|
left.location.register));
|
|
end;
|
|
{ see LOC_CREGISTER }
|
|
LOC_REGISTER:;
|
|
end;
|
|
{ sign extend even further if necessary }
|
|
if opsize in [OS_64,OS_S64] then
|
|
begin
|
|
location.registerhigh := getregister32;
|
|
if (opsize = OS_64) or
|
|
not (is_signed(left.resulttype.def)) then
|
|
cg.a_load_const_reg(exprasmlist,OS_32,0,
|
|
location.registerhigh)
|
|
else
|
|
{ duplicate the sign bit 32 times in the high reg }
|
|
exprasmlist.concat(taicpu.op_reg_reg_const(A_SRAWI,
|
|
location.registerhigh,location.register,31));
|
|
end;
|
|
end
|
|
else
|
|
setlocation(location,left.location);
|
|
end;
|
|
|
|
|
|
procedure tppctypeconvnode.second_int_to_real;
|
|
|
|
type
|
|
dummyrec = record
|
|
i: int64;
|
|
end;
|
|
var
|
|
tempconst: trealconstnode;
|
|
ref: treference;
|
|
valuereg, tempreg, leftreg, tmpfpureg: tregister;
|
|
signed: boolean;
|
|
begin
|
|
{ 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 }
|
|
gettempofsizereference(8,ref);
|
|
|
|
signed := is_signed(left.resulttype.def);
|
|
|
|
{ we need a certain constant for the conversion, so create it here }
|
|
if signed then
|
|
tempconst :=
|
|
{ we need this strange typecast because we want the }
|
|
{ double represented by $4330000080000000, not the }
|
|
{ double converted from the integer with that value }
|
|
crealconstnode.create(double(dummyrec($4330000080000000)),
|
|
pbestrealtype^)
|
|
else
|
|
tempconst :=
|
|
crealconstnode.create(double(dummyrec($4330000000000000)),
|
|
pbestrealtype^)
|
|
|
|
resulttypepass(tempconst);
|
|
firstpass(tempconst);
|
|
secondpass(tempconst);
|
|
if (tempconst.location.loc <> LOC_MEM) 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
|
|
valuereg := cg.get_scratch_reg(exprasmlist)
|
|
else
|
|
valuereg := leftreg;
|
|
end;
|
|
LOC_REFERENCE,LOC_MEM:
|
|
begin
|
|
leftreg := cg.get_scratch_reg(exprasmlist);
|
|
valuereg := leftreg;
|
|
cg.a_load_ref_reg(exprasmlist,def_cgsize(left.resulttype.def),
|
|
left.location.reference,leftreg);
|
|
end
|
|
else
|
|
internalerror(200110012);
|
|
end;
|
|
tempreg := cg.get_scratch_reg(exprasmlist);
|
|
exprasmlist.concat(taicpu.op_reg_const(A_LIS,tempreg,$4330));
|
|
cg.a_load_reg_ref(exprasmlist,OS_32,tempreg,ref);
|
|
if signed then
|
|
exprasmlist.concat(taicpu.op_reg_reg_const(A_XORIS,valuereg,
|
|
leftreg,$8000));
|
|
inc(ref.offset,4);
|
|
cg.a_load_reg_ref(exprasmlist,OS_32,valuereg,ref);
|
|
|
|
if (left.location.loc = LOC_REGISTER) or
|
|
((left.location.loc = LOC_CREGISTER) and
|
|
not signed) then
|
|
ungetregister(leftreg)
|
|
else
|
|
cg.free_scratch_reg(exprasmlist,valuereg);
|
|
|
|
tmpfpureg := get_scratch_reg_fpu(exprasmlist);
|
|
exprasmlist.concat(taicpu.op_reg_ref(A_LFD,tmpfpureg,tempconst.location.reference));
|
|
tempconst.free;
|
|
|
|
location.register := getregisterfpu;
|
|
exprasmlist.concat(taicpu.op_reg_ref(A_LFD,location.register,ref));
|
|
|
|
{ restore original offset before ungeting the tempref }
|
|
dec(ref.offset,4);
|
|
ungetiftemp(ref);
|
|
|
|
exprasmlist.concat(taicpu.op_reg_reg_reg(A_FSUB,location.register,
|
|
location.register,tmpfpureg));
|
|
ungetregister(tmpfpureg);
|
|
end;
|
|
|
|
|
|
procedure tppctypeconvnode.second_int_to_bool;
|
|
var
|
|
hreg1,
|
|
hreg2 : tregister;
|
|
resflags : tresflags;
|
|
opsize : tcgsize;
|
|
begin
|
|
clear_location(location);
|
|
{ byte(boolean) or word(wordbool) or longint(longbool) must
|
|
be accepted for var parameters }
|
|
if (nf_explizit in flags) and
|
|
(left.resulttype.def.size=resulttype.def.size) and
|
|
(left.location.loc in [LOC_REFERENCE,LOC_MEM,LOC_CREGISTER]) then
|
|
begin
|
|
set_location(location,left.location);
|
|
exit;
|
|
end;
|
|
location.loc:=LOC_REGISTER;
|
|
opsize := def_cgsize(left.resulttype.def);
|
|
case left.location.loc of
|
|
LOC_MEM,LOC_REFERENCE,LOC_REGISTER,LOC_CREGISTER :
|
|
begin
|
|
if left.location.loc in [LOC_MEM,LOC_REFERENCE] then
|
|
begin
|
|
del_reference(left.location);
|
|
hreg2:=getregister32;
|
|
cg.a_load_ref_reg(exprasmlist,opsize,
|
|
left.location.reference,hreg2);
|
|
end
|
|
else
|
|
hreg2 := left.location.register;
|
|
hreg1 := getregister32;
|
|
exprasmlist.concat(taicpu.op_reg_reg_const(A_SUBIC,hreg1,
|
|
hreg2,1);
|
|
exprasmlist.concat(taicpu.op_reg_reg_reg(A_SUBFE,hreg1,hreg1,
|
|
hreg2);
|
|
ungetregister(hreg2);
|
|
end;
|
|
LOC_FLAGS :
|
|
begin
|
|
hreg1:=getregister32;
|
|
resflags:=left.location.resflags;
|
|
emit_flag2reg(resflags,hreg1);
|
|
end;
|
|
else
|
|
internalerror(10062);
|
|
end;
|
|
location.register := hreg1;
|
|
end;
|
|
|
|
begin
|
|
ctypeconvnode:=tppctypeconvnode;
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.3 2001-10-28 14:17:10 jonas
|
|
+ second_int_to_real for cardinal, int64 and qword
|
|
|
|
Revision 1.2 2001/10/01 12:17:26 jonas
|
|
+ implemented second_int_to_real
|
|
* fixed small bug in second_int_to_int
|
|
|
|
Revision 1.1 2001/09/29 21:33:12 jonas
|
|
+ implemented in_to_bool and int_to_int (+ helper in nppcutil)
|
|
|
|
|
|
}
|