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226 lines
8.4 KiB
ObjectPascal
226 lines
8.4 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Florian Klaempfl
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Generate ARM 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 narmcnv;
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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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tarmtypeconvnode = 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_int;override; }
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{ procedure second_string_to_string;override; }
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{ procedure second_cstring_to_pchar;override; }
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{ procedure second_string_to_chararray;override; }
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{ procedure second_array_to_pointer;override; }
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// function first_int_to_real: tnode; override;
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{ procedure second_pointer_to_array;override; }
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{ procedure second_chararray_to_string;override; }
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{ procedure second_char_to_string;override; }
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procedure second_int_to_real;override;
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// procedure second_real_to_real;override;
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{ procedure second_cord_to_pointer;override; }
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{ procedure second_proc_to_procvar;override; }
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{ procedure second_bool_to_int;override; }
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procedure second_int_to_bool;override;
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{ procedure second_load_smallset;override; }
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{ procedure second_ansistring_to_pchar;override; }
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{ procedure second_pchar_to_string;override; }
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{ procedure second_class_to_intf;override; }
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{ procedure second_char_to_char;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,cgutils,
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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,cgcpu;
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{*****************************************************************************
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FirstTypeConv
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*****************************************************************************}
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function tarmtypeconvnode.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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{ converting a 64bit integer to a float requires a helper }
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if is_64bitint(left.resulttype.def) or
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is_currency(left.resulttype.def) then
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begin
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{ hack to avoid double division by 10000, as it's
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already done by resulttypepass.resulttype_int_to_real }
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if is_currency(left.resulttype.def) then
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left.resulttype := s64inttype;
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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,s32inttype)
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else
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inserttypeconv(left,u32inttype);
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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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expectloc:=LOC_FPUREGISTER;
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end;
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procedure tarmtypeconvnode.second_int_to_real;
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var
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instr : taicpu;
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begin
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location_reset(location,LOC_FPUREGISTER,def_cgsize(resulttype.def));
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location_force_reg(exprasmlist,left.location,OS_32,true);
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location.register:=cg.getfpuregister(exprasmlist,location.size);
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instr:=taicpu.op_reg_reg(A_FLT,location.register,left.location.register);
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instr.oppostfix:=cgsize2fpuoppostfix[def_cgsize(resulttype.def)];
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exprasmlist.concat(instr);
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end;
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procedure tarmtypeconvnode.second_int_to_bool;
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var
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hregister : tregister;
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href : treference;
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resflags : tresflags;
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hlabel,oldtruelabel,oldfalselabel : tasmlabel;
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begin
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oldtruelabel:=truelabel;
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oldfalselabel:=falselabel;
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objectlibrary.getlabel(truelabel);
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objectlibrary.getlabel(falselabel);
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secondpass(left);
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if codegenerror then
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exit;
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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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truelabel:=oldtruelabel;
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falselabel:=oldfalselabel;
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exit;
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end;
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{ Load left node into flag F_NE/F_E }
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resflags:=F_NE;
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case left.location.loc of
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LOC_CREFERENCE,
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LOC_REFERENCE :
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begin
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if left.location.size in [OS_64,OS_S64] then
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begin
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hregister:=cg.getintregister(exprasmlist,OS_INT);
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cg.a_load_ref_reg(exprasmlist,OS_32,OS_32,left.location.reference,hregister);
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href:=left.location.reference;
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inc(href.offset,4);
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tcgarm(cg).cgsetflags:=true;
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cg.a_op_ref_reg(exprasmlist,OP_OR,OS_32,href,hregister);
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tcgarm(cg).cgsetflags:=false;
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end
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else
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begin
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location_force_reg(exprasmlist,left.location,left.location.size,true);
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tcgarm(cg).cgsetflags:=true;
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cg.a_op_reg_reg(exprasmlist,OP_OR,left.location.size,left.location.register,left.location.register);
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tcgarm(cg).cgsetflags:=false;
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end;
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end;
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LOC_FLAGS :
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begin
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resflags:=left.location.resflags;
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end;
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LOC_REGISTER,LOC_CREGISTER :
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begin
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if left.location.size in [OS_64,OS_S64] then
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begin
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hregister:=cg.getintregister(exprasmlist,OS_32);
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cg.a_load_reg_reg(exprasmlist,OS_32,OS_32,left.location.register64.reglo,hregister);
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tcgarm(cg).cgsetflags:=true;
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cg.a_op_reg_reg(exprasmlist,OP_OR,OS_32,left.location.register64.reghi,hregister);
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tcgarm(cg).cgsetflags:=false;
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end
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else
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begin
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tcgarm(cg).cgsetflags:=true;
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cg.a_op_reg_reg(exprasmlist,OP_OR,left.location.size,left.location.register,left.location.register);
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tcgarm(cg).cgsetflags:=false;
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end;
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end;
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LOC_JUMP :
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begin
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hregister:=cg.getintregister(exprasmlist,OS_INT);
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objectlibrary.getlabel(hlabel);
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cg.a_label(exprasmlist,truelabel);
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cg.a_load_const_reg(exprasmlist,OS_INT,1,hregister);
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cg.a_jmp_always(exprasmlist,hlabel);
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cg.a_label(exprasmlist,falselabel);
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cg.a_load_const_reg(exprasmlist,OS_INT,0,hregister);
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cg.a_label(exprasmlist,hlabel);
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tcgarm(cg).cgsetflags:=true;
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cg.a_op_reg_reg(exprasmlist,OP_OR,OS_INT,hregister,hregister);
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tcgarm(cg).cgsetflags:=false;
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end;
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else
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internalerror(200311301);
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end;
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{ load flags to register }
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location_reset(location,LOC_REGISTER,def_cgsize(resulttype.def));
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location.register:=cg.getintregister(exprasmlist,location.size);
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cg.g_flags2reg(exprasmlist,location.size,resflags,location.register);
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truelabel:=oldtruelabel;
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falselabel:=oldfalselabel;
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end;
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begin
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ctypeconvnode:=tarmtypeconvnode;
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end.
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