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			803 lines
		
	
	
		
			29 KiB
		
	
	
	
		
			ObjectPascal
		
	
	
	
	
	
			
		
		
	
	
			803 lines
		
	
	
		
			29 KiB
		
	
	
	
		
			ObjectPascal
		
	
	
	
	
	
{
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    Copyright (c) 2000-2002 by the FPC development team
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    Code generation for add nodes (generic version)
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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 ncgadd;
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{$i fpcdefs.inc}
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interface
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    uses
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       node,nadd,cpubase;
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    type
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       tcgaddnode = class(taddnode)
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{          function pass_1: tnode; override;}
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          procedure pass_generate_code;override;
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         protected
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          { call secondpass for both left and right }
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          procedure pass_left_right;
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          { set the register of the result location }
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          procedure set_result_location_reg;
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          { load left and right nodes into registers }
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          procedure force_reg_left_right(allow_swap,allow_constant:boolean);
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          procedure second_opfloat;
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          procedure second_opboolean;
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          procedure second_opsmallset;
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          procedure second_op64bit;
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          procedure second_opordinal;
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          procedure second_addstring;virtual;
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          procedure second_addfloat;virtual;abstract;
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          procedure second_addboolean;virtual;
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          procedure second_addsmallset;virtual;
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{$ifdef x86}
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{$ifdef SUPPORT_MMX}
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          procedure second_opmmxset;virtual;abstract;
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          procedure second_opmmx;virtual;abstract;
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{$endif SUPPORT_MMX}
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{$endif x86}
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          procedure second_opvector;virtual;abstract;
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          procedure second_add64bit;virtual;
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          procedure second_addordinal;virtual;
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          procedure second_cmpfloat;virtual;abstract;
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          procedure second_cmpboolean;virtual;
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          procedure second_cmpsmallset;virtual;abstract;
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          procedure second_cmp64bit;virtual;abstract;
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          procedure second_cmpordinal;virtual;abstract;
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       end;
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  implementation
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    uses
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      globtype,systems,
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      cutils,verbose,globals,
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      symconst,symdef,paramgr,
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      aasmbase,aasmtai,aasmdata,defutil,
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      cgbase,procinfo,pass_2,
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      ncon,nset,ncgutil,cgobj,cgutils
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      ;
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{*****************************************************************************
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                                  Helpers
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*****************************************************************************}
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    procedure tcgaddnode.pass_left_right;
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      var
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        tmpreg     : tregister;
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        isjump,
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        pushedfpu  : boolean;
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        otl,ofl    : tasmlabel;
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      begin
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        { calculate the operator which is more difficult }
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        firstcomplex(self);
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        { in case of constant put it to the left }
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        if (left.nodetype=ordconstn) then
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          swapleftright;
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        isjump:=(left.expectloc=LOC_JUMP);
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        if isjump then
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          begin
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             otl:=current_procinfo.CurrTrueLabel;
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             current_asmdata.getjumplabel(current_procinfo.CurrTrueLabel);
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             ofl:=current_procinfo.CurrFalseLabel;
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             current_asmdata.getjumplabel(current_procinfo.CurrFalseLabel);
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          end;
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        secondpass(left);
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        if left.location.loc in [LOC_FLAGS,LOC_JUMP] then
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          location_force_reg(current_asmdata.CurrAsmList,left.location,def_cgsize(resultdef),false);
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        if isjump then
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          begin
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            current_procinfo.CurrTrueLabel:=otl;
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            current_procinfo.CurrFalseLabel:=ofl;
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          end;
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        { are too few registers free? }
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        if left.location.loc=LOC_FPUREGISTER then
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          pushedfpu:=maybe_pushfpu(current_asmdata.CurrAsmList,right.registersfpu,left.location)
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        else
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          pushedfpu:=false;
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        isjump:=(right.expectloc=LOC_JUMP);
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        if isjump then
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          begin
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             otl:=current_procinfo.CurrTrueLabel;
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             current_asmdata.getjumplabel(current_procinfo.CurrTrueLabel);
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             ofl:=current_procinfo.CurrFalseLabel;
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             current_asmdata.getjumplabel(current_procinfo.CurrFalseLabel);
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          end;
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        secondpass(right);
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        if right.location.loc in [LOC_FLAGS,LOC_JUMP] then
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          location_force_reg(current_asmdata.CurrAsmList,right.location,def_cgsize(resultdef),false);
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        if isjump then
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          begin
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            current_procinfo.CurrTrueLabel:=otl;
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            current_procinfo.CurrFalseLabel:=ofl;
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          end;
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        if pushedfpu then
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          begin
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            tmpreg := cg.getfpuregister(current_asmdata.CurrAsmList,left.location.size);
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            cg.a_loadfpu_loc_reg(current_asmdata.CurrAsmList,left.location,tmpreg);
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            location_reset(left.location,LOC_FPUREGISTER,left.location.size);
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            left.location.register := tmpreg;
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{$ifdef x86}
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            { left operand is now on top of the stack, instead of the right one! }
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            toggleflag(nf_swaped);
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{$endif x86}
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          end;
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      end;
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    procedure tcgaddnode.set_result_location_reg;
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      begin
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        location_reset(location,LOC_REGISTER,def_cgsize(resultdef));
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{$ifdef x86}
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        if left.location.loc=LOC_REGISTER then
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          begin
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            if TCGSize2Size[left.location.size]<>TCGSize2Size[location.size] then
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              internalerror(200307041);
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{$ifndef cpu64bit}
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            if location.size in [OS_64,OS_S64] then
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              begin
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                location.register64.reglo := left.location.register64.reglo;
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                location.register64.reghi := left.location.register64.reghi;
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              end
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            else
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{$endif}
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              location.register := left.location.register;
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          end
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        else
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         if right.location.loc=LOC_REGISTER then
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          begin
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            if TCGSize2Size[right.location.size]<>TCGSize2Size[location.size] then
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              internalerror(200307042);
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{$ifndef cpu64bit}
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            if location.size in [OS_64,OS_S64] then
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              begin
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                location.register64.reglo := right.location.register64.reglo;
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                location.register64.reghi := right.location.register64.reghi;
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              end
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            else
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{$endif}
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              location.register := right.location.register;
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          end
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        else
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{$endif}
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          begin
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{$ifndef cpu64bit}
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            if location.size in [OS_64,OS_S64] then
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              begin
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                location.register64.reglo := cg.getintregister(current_asmdata.CurrAsmList,OS_INT);
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                location.register64.reghi := cg.getintregister(current_asmdata.CurrAsmList,OS_INT);
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              end
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            else
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{$endif}
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            location.register := cg.getintregister(current_asmdata.CurrAsmList,location.size);
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          end;
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      end;
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    procedure tcgaddnode.force_reg_left_right(allow_swap,allow_constant:boolean);
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      begin
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        if (left.location.loc<>LOC_REGISTER) and
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           not(
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               allow_constant and
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               (left.location.loc in [LOC_CONSTANT,LOC_CREGISTER])
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              ) then
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          location_force_reg(current_asmdata.CurrAsmList,left.location,left.location.size,false);
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        if (right.location.loc<>LOC_REGISTER) and
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           not(
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               allow_constant and
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               (right.location.loc in [LOC_CONSTANT,LOC_CREGISTER]) and
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               (left.location.loc<>LOC_CONSTANT)
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              ) then
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          location_force_reg(current_asmdata.CurrAsmList,right.location,right.location.size,false);
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        { Left is always a register, right can be register or constant }
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        if left.location.loc=LOC_CONSTANT then
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          begin
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            { when it is not allowed to swap we have a constant on
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              left, that will give problems }
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            if not allow_swap then
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              internalerror(200307043);
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            swapleftright;
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          end;
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      end;
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{*****************************************************************************
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                                Smallsets
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*****************************************************************************}
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    procedure tcgaddnode.second_opsmallset;
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      begin
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        { when a setdef is passed, it has to be a smallset }
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        if ((left.resultdef.typ=setdef) and
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            (tsetdef(left.resultdef).settype<>smallset)) or
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           ((right.resultdef.typ=setdef) and
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            (tsetdef(right.resultdef).settype<>smallset)) then
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          internalerror(200203301);
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        if nodetype in [equaln,unequaln,gtn,gten,lten,ltn] then
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          second_cmpsmallset
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        else
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          second_addsmallset;
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      end;
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    procedure tcgaddnode.second_addsmallset;
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      var
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        cgop   : TOpCg;
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        tmpreg : tregister;
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        opdone : boolean;
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      begin
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        opdone := false;
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        pass_left_right;
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        force_reg_left_right(true,true);
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        { setelementn is a special case, it must be on right.
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          We need an extra check if left is a register because the
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          default case can skip the register loading when the
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          setelementn is in a register (PFV) }
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        if (nf_swaped in flags) and
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           (left.nodetype=setelementn) then
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          swapleftright;
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        if (right.nodetype=setelementn) and
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           (left.location.loc<>LOC_REGISTER) then
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          location_force_reg(current_asmdata.CurrAsmList,left.location,left.location.size,false);
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        set_result_location_reg;
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        case nodetype of
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          addn :
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            begin
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              { are we adding set elements ? }
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              if right.nodetype=setelementn then
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                begin
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                  { no range support for smallsets! }
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                  if assigned(tsetelementnode(right).right) then
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                   internalerror(43244);
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                  if (right.location.loc = LOC_CONSTANT) then
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                    cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,OP_OR,location.size,
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                      aint(1 shl right.location.value),
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                      left.location.register,location.register)
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                  else
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                    begin
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                      tmpreg := cg.getintregister(current_asmdata.CurrAsmList,location.size);
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                      cg.a_load_const_reg(current_asmdata.CurrAsmList,location.size,1,tmpreg);
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                      cg.a_op_reg_reg(current_asmdata.CurrAsmList,OP_SHL,location.size,
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                        right.location.register,tmpreg);
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                      if left.location.loc <> LOC_CONSTANT then
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                        cg.a_op_reg_reg_reg(current_asmdata.CurrAsmList,OP_OR,location.size,tmpreg,
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                            left.location.register,location.register)
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                      else
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                        cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,OP_OR,location.size,
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                            left.location.value,tmpreg,location.register);
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                    end;
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                  opdone := true;
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                end
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              else
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                cgop := OP_OR;
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            end;
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          symdifn :
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            cgop:=OP_XOR;
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          muln :
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            cgop:=OP_AND;
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          subn :
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            begin
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              cgop:=OP_AND;
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              if (not(nf_swaped in flags)) then
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                if (right.location.loc=LOC_CONSTANT) then
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                  right.location.value := not(right.location.value)
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                else
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                  opdone := true
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              else if (left.location.loc=LOC_CONSTANT) then
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                left.location.value := not(left.location.value)
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              else
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                 begin
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                   swapleftright;
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                   opdone := true;
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                 end;
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              if opdone then
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                begin
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                  if left.location.loc = LOC_CONSTANT then
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                    begin
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                      tmpreg := cg.getintregister(current_asmdata.CurrAsmList,location.size);
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                      cg.a_load_const_reg(current_asmdata.CurrAsmList,location.size,
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                        left.location.value,tmpreg);
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                      cg.a_op_reg_reg(current_asmdata.CurrAsmList,OP_NOT,location.size,right.location.register,right.location.register);
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                      cg.a_op_reg_reg(current_asmdata.CurrAsmList,OP_AND,location.size,right.location.register,tmpreg);
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                      cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_INT,location.size,tmpreg,location.register);
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                    end
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                  else
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                    begin
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                      cg.a_op_reg_reg(current_asmdata.CurrAsmList,OP_NOT,right.location.size,right.location.register,right.location.register);
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                      cg.a_op_reg_reg(current_asmdata.CurrAsmList,OP_AND,left.location.size,right.location.register,left.location.register);
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                      cg.a_load_reg_reg(current_asmdata.CurrAsmList,left.location.size,location.size,left.location.register,location.register);
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                    end;
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                end;
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            end;
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          else
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            internalerror(2002072701);
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        end;
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        if not opdone then
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          begin
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            // these are all commutative operations
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            if (left.location.loc = LOC_CONSTANT) then
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              swapleftright;
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            if (right.location.loc = LOC_CONSTANT) then
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              cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,cgop,location.size,
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                right.location.value,left.location.register,
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                location.register)
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            else
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              cg.a_op_reg_reg_reg(current_asmdata.CurrAsmList,cgop,location.size,
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                right.location.register,left.location.register,
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                location.register);
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          end;
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      end;
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{*****************************************************************************
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                                Boolean
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*****************************************************************************}
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    procedure tcgaddnode.second_opboolean;
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      begin
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        if nodetype in [ltn,lten,gtn,gten,equaln,unequaln] then
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          second_cmpboolean
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        else
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          second_addboolean;
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      end;
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    procedure tcgaddnode.second_addboolean;
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      var
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        cgop    : TOpCg;
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        otl,ofl : tasmlabel;
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        oldflowcontrol : tflowcontrol;
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      begin
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        { And,Or will only evaluate from left to right only the
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          needed nodes unless full boolean evaluation is enabled }
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        if (nodetype in [orn,andn]) and
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           (not(cs_full_boolean_eval in current_settings.localswitches) or
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            (nf_short_bool in flags)) then
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          begin
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            location_reset(location,LOC_JUMP,OS_NO);
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            case nodetype of
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              andn :
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                begin
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                   otl:=current_procinfo.CurrTrueLabel;
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                   current_asmdata.getjumplabel(current_procinfo.CurrTrueLabel);
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                   secondpass(left);
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                   maketojumpbool(current_asmdata.CurrAsmList,left,lr_load_regvars);
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                   cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrTrueLabel);
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                   current_procinfo.CurrTrueLabel:=otl;
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                end;
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              orn :
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                begin
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                   ofl:=current_procinfo.CurrFalseLabel;
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                   current_asmdata.getjumplabel(current_procinfo.CurrFalseLabel);
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                   secondpass(left);
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                   maketojumpbool(current_asmdata.CurrAsmList,left,lr_load_regvars);
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                   cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrFalseLabel);
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                   current_procinfo.CurrFalseLabel:=ofl;
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                end;
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              else
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                internalerror(200307044);
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            end;
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            { these jumps mean we're now in a flow control construct }
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            oldflowcontrol:=flowcontrol;
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            include(flowcontrol,fc_inflowcontrol);
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            secondpass(right);
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            maketojumpbool(current_asmdata.CurrAsmList,right,lr_load_regvars);
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            flowcontrol:=oldflowcontrol+(flowcontrol-[fc_inflowcontrol]);
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          end
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						|
        else
 | 
						|
          begin
 | 
						|
            pass_left_right;
 | 
						|
            force_reg_left_right(false,true);
 | 
						|
            set_result_location_reg;
 | 
						|
 | 
						|
            case nodetype of
 | 
						|
              xorn :
 | 
						|
                cgop:=OP_XOR;
 | 
						|
              orn :
 | 
						|
                cgop:=OP_OR;
 | 
						|
              andn :
 | 
						|
                cgop:=OP_AND;
 | 
						|
              else
 | 
						|
                 internalerror(200203247);
 | 
						|
            end;
 | 
						|
 | 
						|
            if right.location.loc <> LOC_CONSTANT then
 | 
						|
              cg.a_op_reg_reg_reg(current_asmdata.CurrAsmList,cgop,location.size,
 | 
						|
                 left.location.register,right.location.register,
 | 
						|
                 location.register)
 | 
						|
            else
 | 
						|
              cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,cgop,location.size,
 | 
						|
                 right.location.value,left.location.register,
 | 
						|
                 location.register);
 | 
						|
         end;
 | 
						|
      end;
 | 
						|
 | 
						|
 | 
						|
{*****************************************************************************
 | 
						|
                                64-bit
 | 
						|
*****************************************************************************}
 | 
						|
 | 
						|
    procedure tcgaddnode.second_op64bit;
 | 
						|
      begin
 | 
						|
        if nodetype in [ltn,lten,gtn,gten,equaln,unequaln] then
 | 
						|
          second_cmp64bit
 | 
						|
        else
 | 
						|
          second_add64bit;
 | 
						|
      end;
 | 
						|
 | 
						|
 | 
						|
    procedure tcgaddnode.second_add64bit;
 | 
						|
      var
 | 
						|
        op         : TOpCG;
 | 
						|
        checkoverflow : boolean;
 | 
						|
        ovloc : tlocation;
 | 
						|
      begin
 | 
						|
        ovloc.loc:=LOC_VOID;
 | 
						|
 | 
						|
        pass_left_right;
 | 
						|
        force_reg_left_right(false,true);
 | 
						|
        set_result_location_reg;
 | 
						|
 | 
						|
        { assume no overflow checking is required }
 | 
						|
        checkoverflow := false;
 | 
						|
        case nodetype of
 | 
						|
          addn :
 | 
						|
             begin
 | 
						|
                op:=OP_ADD;
 | 
						|
                checkoverflow:=true;
 | 
						|
             end;
 | 
						|
          subn :
 | 
						|
             begin
 | 
						|
                op:=OP_SUB;
 | 
						|
                checkoverflow:=true;
 | 
						|
             end;
 | 
						|
          xorn:
 | 
						|
            op:=OP_XOR;
 | 
						|
          orn:
 | 
						|
            op:=OP_OR;
 | 
						|
          andn:
 | 
						|
            op:=OP_AND;
 | 
						|
          muln:
 | 
						|
            begin
 | 
						|
              { should be handled in pass_1 (JM) }
 | 
						|
              internalerror(200109051);
 | 
						|
            end;
 | 
						|
          else
 | 
						|
            internalerror(2002072705);
 | 
						|
        end;
 | 
						|
 | 
						|
{$ifdef cpu64bit}
 | 
						|
        case nodetype of
 | 
						|
          xorn,orn,andn,addn:
 | 
						|
            begin
 | 
						|
              if (right.location.loc = LOC_CONSTANT) then
 | 
						|
                cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,op,location.size,right.location.value,
 | 
						|
                  left.location.register,location.register)
 | 
						|
              else
 | 
						|
                cg.a_op_reg_reg_reg(current_asmdata.CurrAsmList,op,location.size,right.location.register,
 | 
						|
                  left.location.register,location.register);
 | 
						|
            end;
 | 
						|
          subn:
 | 
						|
            begin
 | 
						|
              if (nf_swaped in flags) then
 | 
						|
                swapleftright;
 | 
						|
 | 
						|
              if left.location.loc <> LOC_CONSTANT then
 | 
						|
                begin
 | 
						|
                  if right.location.loc <> LOC_CONSTANT then
 | 
						|
                    // reg64 - reg64
 | 
						|
                    cg.a_op_reg_reg_reg_checkoverflow(current_asmdata.CurrAsmList,OP_SUB,location.size,
 | 
						|
                      right.location.register,left.location.register,location.register,
 | 
						|
                      checkoverflow and (cs_check_overflow in current_settings.localswitches),ovloc)
 | 
						|
                  else
 | 
						|
                    // reg64 - const64
 | 
						|
                    cg.a_op_const_reg_reg_checkoverflow(current_asmdata.CurrAsmList,OP_SUB,location.size,
 | 
						|
                      right.location.value,left.location.register,location.register,
 | 
						|
                      checkoverflow and (cs_check_overflow in current_settings.localswitches),ovloc);
 | 
						|
                end
 | 
						|
              else
 | 
						|
                begin
 | 
						|
                  // const64 - reg64
 | 
						|
                  location_force_reg(current_asmdata.CurrAsmList,left.location,left.location.size,true);
 | 
						|
                  cg.a_op_reg_reg_reg_checkoverflow(current_asmdata.CurrAsmList,OP_SUB,location.size,
 | 
						|
                    right.location.register,left.location.register,location.register,
 | 
						|
                    checkoverflow and (cs_check_overflow in current_settings.localswitches),ovloc);
 | 
						|
                end;
 | 
						|
            end;
 | 
						|
          else
 | 
						|
            internalerror(2002072803);
 | 
						|
        end;
 | 
						|
{$else cpu64bit}
 | 
						|
        case nodetype of
 | 
						|
          xorn,orn,andn,addn:
 | 
						|
            begin
 | 
						|
              if (right.location.loc = LOC_CONSTANT) then
 | 
						|
                cg64.a_op64_const_reg_reg_checkoverflow(current_asmdata.CurrAsmList,op,location.size,right.location.value64,
 | 
						|
                  left.location.register64,location.register64,
 | 
						|
                  checkoverflow and (cs_check_overflow in current_settings.localswitches),ovloc)
 | 
						|
              else
 | 
						|
                cg64.a_op64_reg_reg_reg_checkoverflow(current_asmdata.CurrAsmList,op,location.size,right.location.register64,
 | 
						|
                  left.location.register64,location.register64,
 | 
						|
                  checkoverflow and (cs_check_overflow in current_settings.localswitches),ovloc);
 | 
						|
            end;
 | 
						|
          subn:
 | 
						|
            begin
 | 
						|
              if (nf_swaped in flags) then
 | 
						|
                swapleftright;
 | 
						|
 | 
						|
              if left.location.loc <> LOC_CONSTANT then
 | 
						|
                begin
 | 
						|
                  if right.location.loc <> LOC_CONSTANT then
 | 
						|
                    // reg64 - reg64
 | 
						|
                    cg64.a_op64_reg_reg_reg_checkoverflow(current_asmdata.CurrAsmList,OP_SUB,location.size,
 | 
						|
                      right.location.register64,left.location.register64,
 | 
						|
                      location.register64,
 | 
						|
                      checkoverflow and (cs_check_overflow in current_settings.localswitches),ovloc)
 | 
						|
                  else
 | 
						|
                    // reg64 - const64
 | 
						|
                    cg64.a_op64_const_reg_reg_checkoverflow(current_asmdata.CurrAsmList,OP_SUB,location.size,
 | 
						|
                      right.location.value64,left.location.register64,
 | 
						|
                      location.register64,
 | 
						|
                      checkoverflow and (cs_check_overflow in current_settings.localswitches),ovloc)
 | 
						|
                end
 | 
						|
              else
 | 
						|
                begin
 | 
						|
                  // const64 - reg64
 | 
						|
                  location_force_reg(current_asmdata.CurrAsmList,left.location,left.location.size,true);
 | 
						|
                  cg64.a_op64_reg_reg_reg_checkoverflow(current_asmdata.CurrAsmList,OP_SUB,location.size,
 | 
						|
                    right.location.register64,left.location.register64,
 | 
						|
                    location.register64,
 | 
						|
                    checkoverflow and (cs_check_overflow in current_settings.localswitches),ovloc);
 | 
						|
                end;
 | 
						|
            end;
 | 
						|
          else
 | 
						|
            internalerror(2002072803);
 | 
						|
        end;
 | 
						|
{$endif cpu64bit}
 | 
						|
 | 
						|
        { emit overflow check if enabled }
 | 
						|
        if checkoverflow then
 | 
						|
           cg.g_overflowcheck_loc(current_asmdata.CurrAsmList,Location,resultdef,ovloc);
 | 
						|
      end;
 | 
						|
 | 
						|
 | 
						|
{*****************************************************************************
 | 
						|
                                Strings
 | 
						|
*****************************************************************************}
 | 
						|
 | 
						|
    procedure tcgaddnode.second_addstring;
 | 
						|
      begin
 | 
						|
        { this should already be handled in pass1 }
 | 
						|
        internalerror(2002072402);
 | 
						|
      end;
 | 
						|
 | 
						|
 | 
						|
{*****************************************************************************
 | 
						|
                                Floats
 | 
						|
*****************************************************************************}
 | 
						|
 | 
						|
    procedure tcgaddnode.second_opfloat;
 | 
						|
      begin
 | 
						|
        if nodetype in [ltn,lten,gtn,gten,equaln,unequaln] then
 | 
						|
          second_cmpfloat
 | 
						|
        else
 | 
						|
          second_addfloat;
 | 
						|
      end;
 | 
						|
 | 
						|
 | 
						|
{*****************************************************************************
 | 
						|
                                Ordinals
 | 
						|
*****************************************************************************}
 | 
						|
 | 
						|
    procedure tcgaddnode.second_opordinal;
 | 
						|
      begin
 | 
						|
         if (nodetype in [ltn,lten,gtn,gten,equaln,unequaln]) then
 | 
						|
           second_cmpordinal
 | 
						|
         else
 | 
						|
           second_addordinal;
 | 
						|
      end;
 | 
						|
 | 
						|
 | 
						|
    procedure tcgaddnode.second_addordinal;
 | 
						|
      var
 | 
						|
        unsigned,
 | 
						|
        checkoverflow : boolean;
 | 
						|
        cgop   : topcg;
 | 
						|
        tmpreg : tregister;
 | 
						|
        ovloc : tlocation;
 | 
						|
      begin
 | 
						|
        ovloc.loc:=LOC_VOID;
 | 
						|
 | 
						|
        pass_left_right;
 | 
						|
        force_reg_left_right(false,true);
 | 
						|
        set_result_location_reg;
 | 
						|
 | 
						|
        { determine if the comparison will be unsigned }
 | 
						|
        unsigned:=not(is_signed(left.resultdef)) or
 | 
						|
                    not(is_signed(right.resultdef));
 | 
						|
 | 
						|
        { assume no overflow checking is require }
 | 
						|
        checkoverflow := false;
 | 
						|
 | 
						|
        case nodetype of
 | 
						|
          addn:
 | 
						|
            begin
 | 
						|
              cgop:=OP_ADD;
 | 
						|
              checkoverflow:=true;
 | 
						|
            end;
 | 
						|
          xorn :
 | 
						|
            begin
 | 
						|
              cgop:=OP_XOR;
 | 
						|
            end;
 | 
						|
          orn :
 | 
						|
            begin
 | 
						|
              cgop:=OP_OR;
 | 
						|
            end;
 | 
						|
          andn:
 | 
						|
            begin
 | 
						|
              cgop:=OP_AND;
 | 
						|
            end;
 | 
						|
          muln:
 | 
						|
            begin
 | 
						|
              checkoverflow:=true;
 | 
						|
              if unsigned then
 | 
						|
                cgop:=OP_MUL
 | 
						|
              else
 | 
						|
                cgop:=OP_IMUL;
 | 
						|
            end;
 | 
						|
          subn :
 | 
						|
            begin
 | 
						|
              checkoverflow:=true;
 | 
						|
              cgop:=OP_SUB;
 | 
						|
            end;
 | 
						|
        end;
 | 
						|
 | 
						|
       if nodetype<>subn then
 | 
						|
        begin
 | 
						|
          if (right.location.loc<>LOC_CONSTANT) then
 | 
						|
            cg.a_op_reg_reg_reg_checkoverflow(current_asmdata.CurrAsmList,cgop,location.size,
 | 
						|
               left.location.register,right.location.register,
 | 
						|
               location.register,checkoverflow and (cs_check_overflow in current_settings.localswitches),ovloc)
 | 
						|
          else
 | 
						|
            cg.a_op_const_reg_reg_checkoverflow(current_asmdata.CurrAsmList,cgop,location.size,
 | 
						|
               right.location.value,left.location.register,
 | 
						|
               location.register,checkoverflow and (cs_check_overflow in current_settings.localswitches),ovloc);
 | 
						|
        end
 | 
						|
      else  { subtract is a special case since its not commutative }
 | 
						|
        begin
 | 
						|
          if (nf_swaped in flags) then
 | 
						|
            swapleftright;
 | 
						|
          if left.location.loc<>LOC_CONSTANT then
 | 
						|
            begin
 | 
						|
              if right.location.loc<>LOC_CONSTANT then
 | 
						|
                cg.a_op_reg_reg_reg_checkoverflow(current_asmdata.CurrAsmList,OP_SUB,location.size,
 | 
						|
                    right.location.register,left.location.register,
 | 
						|
                    location.register,checkoverflow and (cs_check_overflow in current_settings.localswitches),ovloc)
 | 
						|
              else
 | 
						|
                cg.a_op_const_reg_reg_checkoverflow(current_asmdata.CurrAsmList,OP_SUB,location.size,
 | 
						|
                  aword(right.location.value),left.location.register,
 | 
						|
                  location.register,checkoverflow and (cs_check_overflow in current_settings.localswitches),ovloc);
 | 
						|
            end
 | 
						|
          else
 | 
						|
            begin
 | 
						|
              tmpreg:=cg.getintregister(current_asmdata.CurrAsmList,location.size);
 | 
						|
              cg.a_load_const_reg(current_asmdata.CurrAsmList,location.size,
 | 
						|
                left.location.value,tmpreg);
 | 
						|
              cg.a_op_reg_reg_reg_checkoverflow(current_asmdata.CurrAsmList,OP_SUB,location.size,
 | 
						|
                right.location.register,tmpreg,location.register,checkoverflow and (cs_check_overflow in current_settings.localswitches),ovloc);
 | 
						|
            end;
 | 
						|
        end;
 | 
						|
 | 
						|
        { emit overflow check if required }
 | 
						|
        if checkoverflow then
 | 
						|
          cg.g_overflowcheck_loc(current_asmdata.CurrAsmList,Location,resultdef,ovloc);
 | 
						|
      end;
 | 
						|
 | 
						|
 | 
						|
    procedure tcgaddnode.second_cmpboolean;
 | 
						|
      begin
 | 
						|
        second_cmpordinal;
 | 
						|
      end;
 | 
						|
 | 
						|
 | 
						|
{*****************************************************************************
 | 
						|
                                pass_generate_code;
 | 
						|
*****************************************************************************}
 | 
						|
 | 
						|
    procedure tcgaddnode.pass_generate_code;
 | 
						|
      begin
 | 
						|
        case left.resultdef.typ of
 | 
						|
          orddef :
 | 
						|
            begin
 | 
						|
              { handling boolean expressions }
 | 
						|
              if is_boolean(left.resultdef) and
 | 
						|
                 is_boolean(right.resultdef) then
 | 
						|
                second_opboolean
 | 
						|
              { 64bit operations }
 | 
						|
              else if is_64bit(left.resultdef) then
 | 
						|
                second_op64bit
 | 
						|
              else
 | 
						|
                second_opordinal;
 | 
						|
            end;
 | 
						|
          stringdef :
 | 
						|
            begin
 | 
						|
              second_addstring;
 | 
						|
            end;
 | 
						|
          setdef :
 | 
						|
            begin
 | 
						|
              {Normalsets are already handled in pass1 if mmx
 | 
						|
               should not be used.}
 | 
						|
              if (tsetdef(left.resultdef).settype<>smallset) then
 | 
						|
                begin
 | 
						|
{$ifdef SUPPORT_MMX}
 | 
						|
                {$ifdef i386}
 | 
						|
                  if cs_mmx in current_settings.localswitches then
 | 
						|
                    second_opmmxset
 | 
						|
                  else
 | 
						|
                {$endif}
 | 
						|
{$endif SUPPORT_MMX}
 | 
						|
                    internalerror(200109041);
 | 
						|
                end
 | 
						|
              else
 | 
						|
                second_opsmallset;
 | 
						|
            end;
 | 
						|
          arraydef :
 | 
						|
            begin
 | 
						|
              { support dynarr=nil }
 | 
						|
              if is_dynamic_array(left.resultdef) then
 | 
						|
                second_opordinal
 | 
						|
              else
 | 
						|
                if (cs_support_vectors in current_settings.globalswitches) and
 | 
						|
                   is_vector(left.resultdef) then
 | 
						|
                  second_opvector
 | 
						|
{$ifdef SUPPORT_MMX}
 | 
						|
              else
 | 
						|
                if is_mmx_able_array(left.resultdef) then
 | 
						|
                  second_opmmx
 | 
						|
{$endif SUPPORT_MMX}
 | 
						|
              else
 | 
						|
                internalerror(200306016);
 | 
						|
            end;
 | 
						|
          floatdef :
 | 
						|
            second_opfloat;
 | 
						|
          else
 | 
						|
            second_opordinal;
 | 
						|
        end;
 | 
						|
      end;
 | 
						|
 | 
						|
begin
 | 
						|
   caddnode:=tcgaddnode;
 | 
						|
end.
 |