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337 lines
11 KiB
ObjectPascal
337 lines
11 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2002 by Florian Klaempfl
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Generate m68k assembler for type converting nodes
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit n68kcnv;
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{$i fpcdefs.inc}
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interface
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uses
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node,ncnv,ncgcnv,defcmp;
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type
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tm68ktypeconvnode = class(tcgtypeconvnode)
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protected
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function first_int_to_real: tnode; override;
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procedure second_int_to_real;override;
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procedure second_int_to_bool;override;
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procedure pass_2;override;
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procedure second_call_helper(c : tconverttype); override;
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end;
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implementation
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uses
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verbose,globals,systems,
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symconst,symdef,aasmbase,aasmtai,
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defutil,
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cgbase,pass_1,pass_2,
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ncon,ncal,
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ncgutil,
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cpubase,aasmcpu,
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rgobj,tgobj,cgobj,cginfo,globtype,cgcpu;
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{*****************************************************************************
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FirstTypeConv
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*****************************************************************************}
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function tm68ktypeconvnode.first_int_to_real: tnode;
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var
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fname: string[19];
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begin
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{ In case we are in emulation mode, we must
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always call the helpers
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}
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if (cs_fp_emulation in aktmoduleswitches) then
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begin
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result := inherited first_int_to_real;
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exit;
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end
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else
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{ converting a 64bit integer to a float requires a helper }
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if is_64bitint(left.resulttype.def) then
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begin
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if is_signed(left.resulttype.def) then
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fname := 'fpc_int64_to_double'
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else
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fname := 'fpc_qword_to_double';
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result := ccallnode.createintern(fname,ccallparanode.create(
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left,nil));
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left:=nil;
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firstpass(result);
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exit;
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end
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else
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{ other integers are supposed to be 32 bit }
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begin
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if is_signed(left.resulttype.def) then
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inserttypeconv(left,s32bittype)
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else
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{ the fpu always considers 32-bit values as signed
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therefore we need to call the helper in case of
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a cardinal value.
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}
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begin
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fname := 'fpc_longword_to_double';
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result := ccallnode.createintern(fname,ccallparanode.create(
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left,nil));
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left:=nil;
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firstpass(result);
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exit;
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end;
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firstpass(left);
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end;
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result := nil;
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if registersfpu<1 then
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registersfpu:=1;
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location.loc:=LOC_FPUREGISTER;
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end;
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{*****************************************************************************
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SecondTypeConv
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*****************************************************************************}
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procedure tm68ktypeconvnode.second_int_to_real;
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var
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tempconst: trealconstnode;
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ref: treference;
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valuereg, tempreg, leftreg, tmpfpureg: tregister;
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signed : boolean;
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scratch_used : boolean;
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opsize : tcgsize;
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begin
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scratch_used := false;
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location_reset(location,LOC_FPUREGISTER,def_cgsize(resulttype.def));
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signed := is_signed(left.resulttype.def);
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opsize := def_cgsize(left.resulttype.def);
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{ has to be handled by a helper }
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if is_64bitint(left.resulttype.def) then
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internalerror(200110011);
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{ has to be handled by a helper }
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if not signed then
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internalerror(20020814);
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location.register := rg.getregisterfpu(exprasmlist);
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case left.location.loc of
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LOC_REGISTER, LOC_CREGISTER:
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begin
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leftreg := left.location.register;
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exprasmlist.concat(taicpu.op_reg_reg(A_FMOVE,TCGSize2OpSize[opsize],leftreg,
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location.register));
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end;
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LOC_REFERENCE,LOC_CREFERENCE:
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begin
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exprasmlist.concat(taicpu.op_ref_reg(A_FMOVE,TCGSize2OpSize[opsize],
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left.location.reference,location.register));
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end
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else
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internalerror(200110012);
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end;
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end;
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procedure tm68ktypeconvnode.second_int_to_bool;
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var
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hreg1,
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hreg2 : tregister;
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resflags : tresflags;
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opsize : tcgsize;
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begin
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{ byte(boolean) or word(wordbool) or longint(longbool) must }
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{ be accepted for var parameters }
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if (nf_explicit in flags) and
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(left.resulttype.def.size=resulttype.def.size) and
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(left.location.loc in [LOC_REFERENCE,LOC_CREFERENCE,LOC_CREGISTER]) then
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begin
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location_copy(location,left.location);
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exit;
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end;
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location_reset(location,LOC_REGISTER,def_cgsize(left.resulttype.def));
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opsize := def_cgsize(left.resulttype.def);
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case left.location.loc of
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LOC_CREFERENCE,LOC_REFERENCE :
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begin
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{ can we optimize it, or do we need to fix the ref. ? }
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if isvalidrefoffset(left.location.reference) then
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begin
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exprasmlist.concat(taicpu.op_ref(A_TST,TCGSize2OpSize[opsize],
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left.location.reference));
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end
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else
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begin
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hreg2:=rg.getregisterint(exprasmlist,opsize);
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cg.a_load_ref_reg(exprasmlist,opsize,
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left.location.reference,hreg2);
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exprasmlist.concat(taicpu.op_reg(A_TST,TCGSize2OpSize[opsize],hreg2));
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rg.ungetregister(exprasmlist,hreg2);
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end;
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reference_release(exprasmlist,left.location.reference);
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resflags:=F_NE;
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hreg1 := rg.getregisterint(exprasmlist,opsize);
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end;
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LOC_REGISTER,LOC_CREGISTER :
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begin
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hreg2 := left.location.register;
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exprasmlist.concat(taicpu.op_reg(A_TST,TCGSize2OpSize[opsize],hreg2));
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rg.ungetregister(exprasmlist,hreg2);
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hreg1 := rg.getregisterint(exprasmlist,opsize);
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resflags:=F_NE;
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end;
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LOC_FLAGS :
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begin
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hreg1:=rg.getregisterint(exprasmlist,opsize);
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resflags:=left.location.resflags;
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end;
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else
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internalerror(10062);
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end;
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cg.g_flags2reg(exprasmlist,location.size,resflags,hreg1);
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location.register := hreg1;
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end;
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procedure tm68ktypeconvnode.second_call_helper(c : tconverttype);
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const
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secondconvert : array[tconverttype] of pointer = (
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@second_nothing, {equal}
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@second_nothing, {not_possible}
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@second_nothing, {second_string_to_string, handled in resulttype pass }
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@second_char_to_string,
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@second_nothing, {char_to_charray}
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@second_nothing, { pchar_to_string, handled in resulttype pass }
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@second_nothing, {cchar_to_pchar}
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@second_cstring_to_pchar,
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@second_ansistring_to_pchar,
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@second_string_to_chararray,
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@second_nothing, { chararray_to_string, handled in resulttype pass }
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@second_array_to_pointer,
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@second_pointer_to_array,
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@second_int_to_int,
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@second_int_to_bool,
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@second_bool_to_int, { bool_to_bool }
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@second_bool_to_int,
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@second_real_to_real,
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@second_int_to_real,
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@second_nothing, { currency_to_real, handled in resulttype pass }
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@second_proc_to_procvar,
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@second_nothing, { arrayconstructor_to_set }
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@second_nothing, { second_load_smallset, handled in first pass }
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@second_cord_to_pointer,
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@second_nothing, { interface 2 string }
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@second_nothing, { interface 2 guid }
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@second_class_to_intf,
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@second_char_to_char,
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@second_nothing, { normal_2_smallset }
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@second_nothing, { dynarray_2_openarray }
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@second_nothing, { tc_pwchar_2_string }
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{$ifdef fpc}@{$endif}second_nothing, { variant_2_dynarray }
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{$ifdef fpc}@{$endif}second_nothing { dynarray_2_variant}
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);
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type
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tprocedureofobject = procedure of object;
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var
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r : packed record
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proc : pointer;
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obj : pointer;
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end;
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begin
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{ this is a little bit dirty but it works }
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{ and should be quite portable too }
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r.proc:=secondconvert[c];
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r.obj:=self;
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tprocedureofobject(r){$ifdef FPC}();{$endif FPC}
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end;
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procedure tm68ktypeconvnode.pass_2;
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{$ifdef TESTOBJEXT2}
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var
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r : preference;
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nillabel : plabel;
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{$endif TESTOBJEXT2}
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begin
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{ this isn't good coding, I think tc_bool_2_int, shouldn't be }
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{ type conversion (FK) }
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if not(convtype in [tc_bool_2_int,tc_bool_2_bool]) then
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begin
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secondpass(left);
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location_copy(location,left.location);
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if codegenerror then
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exit;
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end;
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second_call_helper(convtype);
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end;
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begin
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ctypeconvnode:=tm68ktypeconvnode;
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end.
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{
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$Log$
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Revision 1.10 2003-04-23 21:10:54 peter
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* fix compile for ppc,sparc,m68k
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Revision 1.9 2003/04/23 13:40:33 peter
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* fix m68k compile
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Revision 1.8 2003/02/19 22:00:16 daniel
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* Code generator converted to new register notation
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- Horribily outdated todo.txt removed
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Revision 1.7 2002/12/05 14:27:53 florian
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* some variant <-> dyn. array stuff
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Revision 1.6 2002/11/25 17:43:27 peter
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* splitted defbase in defutil,symutil,defcmp
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* merged isconvertable and is_equal into compare_defs(_ext)
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* made operator search faster by walking the list only once
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Revision 1.5 2002/11/09 16:10:35 carl
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+ update for compilation
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Revision 1.4 2002/09/07 20:53:28 carl
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* cardinal -> longword
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Revision 1.3 2002/09/07 15:25:13 peter
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* old logs removed and tabs fixed
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Revision 1.2 2002/08/14 19:31:26 carl
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* fix small compilation problem
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Revision 1.1 2002/08/14 19:16:34 carl
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+ m68k type conversion nodes
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+ started some mathematical nodes
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* out of bound references should now be handled correctly
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}
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