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	+ is_64bit for use in cg units instead of is_64bitint * removed cgmessage from n386add, replace with internalerrors
		
			
				
	
	
		
			854 lines
		
	
	
		
			28 KiB
		
	
	
	
		
			ObjectPascal
		
	
	
	
	
	
			
		
		
	
	
			854 lines
		
	
	
		
			28 KiB
		
	
	
	
		
			ObjectPascal
		
	
	
	
	
	
{
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    $Id$
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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,cginfo;
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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_2;override;
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         protected
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          procedure pass_left_and_right;
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          { load left and right nodes into registers }
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          procedure load_left_right(cmpop, load_constants: boolean);
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          { free used registers, except result location }
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          procedure clear_left_right(cmpop: 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_addfloat;virtual;}
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          procedure second_addboolean;virtual;
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          procedure second_addsmallset;virtual;
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          procedure second_add64bit;virtual;
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          procedure second_addordinal;virtual;
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{          procedure second_cmpfloat;virtual;}
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          procedure second_cmpboolean;virtual;abstract;
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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,aasmcpu,defutil,htypechk,
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      cgbase,cpuinfo,pass_1,pass_2,regvars,
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      cpupara,
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      ncon,nset,ncgutil,tgobj,rgobj,rgcpu,cgobj,cg64f32;
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{*****************************************************************************
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                                  Helpers
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*****************************************************************************}
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    procedure tcgaddnode.pass_left_and_right;
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      var
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        pushedregs : tmaybesave;
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        tmpreg     : tregister;
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        pushedfpu  : boolean;
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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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        secondpass(left);
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        { are too few registers free? }
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        maybe_save(exprasmlist,right.registers32,left.location,pushedregs);
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        if location.loc=LOC_FPUREGISTER then
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          pushedfpu:=maybe_pushfpu(exprasmlist,right.registersfpu,left.location)
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        else
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          pushedfpu:=false;
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        secondpass(right);
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        maybe_restore(exprasmlist,left.location,pushedregs);
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        if pushedfpu then
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          begin
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            tmpreg := rg.getregisterfpu(exprasmlist);
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            cg.a_loadfpu_loc_reg(exprasmlist,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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          end;
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      end;
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    procedure tcgaddnode.load_left_right(cmpop, load_constants: boolean);
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      procedure load_node(var n: tnode);
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        begin
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          case n.location.loc of
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            LOC_REGISTER:
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              if not cmpop then
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                begin
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                  location.register := n.location.register;
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                  if is_64bit(n.resulttype.def) then
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                    location.registerhigh := n.location.registerhigh;
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                end;
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            LOC_REFERENCE,LOC_CREFERENCE:
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              begin
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                location_force_reg(exprasmlist,n.location,def_cgsize(n.resulttype.def),false);
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                if not cmpop then
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                  begin
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                    location.register := n.location.register;
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                    if is_64bit(n.resulttype.def) then
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                      location.registerhigh := n.location.registerhigh;
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                  end;
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              end;
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            LOC_CONSTANT:
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              begin
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                if load_constants then
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                  begin
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                    location_force_reg(exprasmlist,n.location,def_cgsize(n.resulttype.def),false);
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                    if not cmpop then
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                      location.register := n.location.register;
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                      if is_64bit(n.resulttype.def) then
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                        location.registerhigh := n.location.registerhigh;
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                  end;
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              end;
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          end;
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        end;
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      begin
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        load_node(left);
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        load_node(right);
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      end;
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    procedure tcgaddnode.clear_left_right(cmpop: boolean);
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      begin
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        if (right.location.loc in [LOC_REGISTER,LOC_FPUREGISTER]) and
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           (cmpop or
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            (location.register.enum <> right.location.register.enum)) then
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          begin
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            rg.ungetregister(exprasmlist,right.location.register);
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            if is_64bit(right.resulttype.def) then
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              rg.ungetregister(exprasmlist,right.location.registerhigh);
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          end;
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        if (left.location.loc in [LOC_REGISTER,LOC_FPUREGISTER]) and
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           (cmpop or
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            (location.register.enum <> left.location.register.enum)) then
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          begin
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            rg.ungetregister(exprasmlist,left.location.register);
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            if is_64bit(left.resulttype.def) then
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              rg.ungetregister(exprasmlist,left.location.registerhigh);
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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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      var
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       cmpop : boolean;
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      begin
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        cmpop := false;
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        pass_left_and_right;
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        { when a setdef is passed, it has to be a smallset }
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        if ((left.resulttype.def.deftype=setdef) and
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            (tsetdef(left.resulttype.def).settype<>smallset)) or
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           ((right.resulttype.def.deftype=setdef) and
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            (tsetdef(right.resulttype.def).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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          cmpop := true;
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        { load non-constant values (left and right) into registers }
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        load_left_right(cmpop,false);
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        if cmpop then
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            second_cmpsmallset
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        else
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            second_addsmallset;
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        clear_left_right(cmpop);
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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,
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        cmpop  : boolean;
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        size:Tcgsize;
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      begin
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        opdone := false;
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        size:=def_cgsize(resulttype.def);
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        location_reset(location,LOC_REGISTER,size);
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        if  (location.register.enum = R_NO) then
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          location.register := rg.getregisterint(exprasmlist,size);
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        case nodetype of
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          addn :
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            begin
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              if (nf_swaped in flags) and (left.nodetype=setelementn) then
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                swapleftright;
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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(exprasmlist,OP_OR,OS_INT,
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                      aword(1 shl aword(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.get_scratch_reg_int(exprasmlist,size);
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                      cg.a_load_const_reg(exprasmlist,OS_INT,1,tmpreg);
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                      cg.a_op_reg_reg(exprasmlist,OP_SHL,OS_INT,
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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(exprasmlist,OP_OR,OS_INT,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(exprasmlist,OP_OR,OS_INT,
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                          aword(left.location.value),tmpreg,location.register);
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                      cg.free_scratch_reg(exprasmlist,tmpreg);
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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.get_scratch_reg_int(exprasmlist,OS_INT);
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                      cg.a_load_const_reg(exprasmlist,OS_INT,
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                        aword(left.location.value),tmpreg);
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                      cg.a_op_reg_reg(exprasmlist,OP_NOT,OS_INT,right.location.register,right.location.register);
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                      cg.a_op_reg_reg(exprasmlist,OP_AND,OS_INT,right.location.register,tmpreg);
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                      cg.a_load_reg_reg(exprasmlist,OS_INT,OS_INT,tmpreg,location.register);
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                      cg.free_scratch_reg(exprasmlist,tmpreg);
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                    end
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                  else
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                    begin
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                      cg.a_op_reg_reg(exprasmlist,OP_NOT,OS_INT,right.location.register,right.location.register);
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                      cg.a_op_reg_reg(exprasmlist,OP_AND,OS_INT,right.location.register,left.location.register);
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                      cg.a_load_reg_reg(exprasmlist,OS_INT,OS_INT,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(exprasmlist,cgop,OS_INT,
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                aword(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(exprasmlist,cgop,OS_INT,
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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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      var
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       cmpop : boolean;
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      begin
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        cmpop := false;
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        { calculate the operator which is more difficult }
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        firstcomplex(self);
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        cmpop := nodetype in [ltn,lten,gtn,gten,equaln,unequaln];
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        if cmpop 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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        cgsize  : TCgSize;
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        isjump  : boolean;
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        otl,ofl : tasmlabel;
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        pushedregs : tmaybesave;
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      begin
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        if (torddef(left.resulttype.def).typ=bool8bit) or
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           (torddef(right.resulttype.def).typ=bool8bit) then
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         cgsize:=OS_8
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        else
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          if (torddef(left.resulttype.def).typ=bool16bit) or
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             (torddef(right.resulttype.def).typ=bool16bit) then
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           cgsize:=OS_16
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        else
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           cgsize:=OS_32;
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        if (cs_full_boolean_eval in aktlocalswitches) or
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           (nodetype in [unequaln,ltn,lten,gtn,gten,equaln,xorn]) then
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          begin
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            if left.nodetype in [ordconstn,realconstn] then
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             swapleftright;
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            isjump:=(left.location.loc=LOC_JUMP);
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            if isjump then
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              begin
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                 otl:=truelabel;
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                 objectlibrary.getlabel(truelabel);
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                 ofl:=falselabel;
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                 objectlibrary.getlabel(falselabel);
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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(exprasmlist,left.location,cgsize,false);
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            if isjump then
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             begin
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               truelabel:=otl;
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               falselabel:=ofl;
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             end;
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            maybe_save(exprasmlist,right.registers32,left.location,pushedregs);
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            isjump:=(right.location.loc=LOC_JUMP);
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            if isjump then
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              begin
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                 otl:=truelabel;
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                 objectlibrary.getlabel(truelabel);
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                 ofl:=falselabel;
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                 objectlibrary.getlabel(falselabel);
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              end;
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            secondpass(right);
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            maybe_restore(exprasmlist,left.location,pushedregs);
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            if right.location.loc in [LOC_FLAGS,LOC_JUMP] then
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             location_force_reg(exprasmlist,right.location,cgsize,false);
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            if isjump then
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             begin
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               truelabel:=otl;
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               falselabel:=ofl;
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             end;
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            { set result location }
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            location_reset(location,LOC_REGISTER,def_cgsize(resulttype.def));
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            load_left_right(false,false);
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						|
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            if (left.location.loc = LOC_CONSTANT) then
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              swapleftright;
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            case nodetype of
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              xorn :
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                cgop:=OP_XOR;
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              orn :
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                cgop:=OP_OR;
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              andn :
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                cgop:=OP_AND;
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              else
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                 internalerror(200203247);
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              end;
 | 
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              if right.location.loc <> LOC_CONSTANT then
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                cg.a_op_reg_reg_reg(exprasmlist,cgop,OS_INT,
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                   left.location.register,right.location.register,
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                   location.register)
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              else
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                 cg.a_op_const_reg_reg(exprasmlist,cgop,OS_INT,
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                    aword(right.location.value),left.location.register,
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                    location.register);
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         end
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        else
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         begin
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           case nodetype of
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             andn,
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             orn :
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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:=truelabel;
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                        objectlibrary.getlabel(truelabel);
 | 
						|
                        secondpass(left);
 | 
						|
                        maketojumpbool(exprasmlist,left,lr_load_regvars);
 | 
						|
                        cg.a_label(exprasmlist,truelabel);
 | 
						|
                        truelabel:=otl;
 | 
						|
                     end;
 | 
						|
                   orn :
 | 
						|
                     begin
 | 
						|
                        ofl:=falselabel;
 | 
						|
                        objectlibrary.getlabel(falselabel);
 | 
						|
                        secondpass(left);
 | 
						|
                        maketojumpbool(exprasmlist,left,lr_load_regvars);
 | 
						|
                        cg.a_label(exprasmlist,falselabel);
 | 
						|
                        falselabel:=ofl;
 | 
						|
                     end;
 | 
						|
                 end;
 | 
						|
                 secondpass(right);
 | 
						|
                 maketojumpbool(exprasmlist,right,lr_load_regvars);
 | 
						|
               end;
 | 
						|
           end;
 | 
						|
         end;
 | 
						|
        { free used register (except the result register) }
 | 
						|
        clear_left_right(true);
 | 
						|
      end;
 | 
						|
 | 
						|
 | 
						|
{*****************************************************************************
 | 
						|
                                64-bit
 | 
						|
*****************************************************************************}
 | 
						|
 | 
						|
    procedure tcgaddnode.second_op64bit;
 | 
						|
     var
 | 
						|
       cmpop : boolean;
 | 
						|
     begin
 | 
						|
        cmpop := false;
 | 
						|
        firstcomplex(self);
 | 
						|
 | 
						|
        pass_left_and_right;
 | 
						|
 | 
						|
        if nodetype in [equaln,unequaln,gtn,gten,ltn,lten] then
 | 
						|
          cmpop := true;
 | 
						|
 | 
						|
        if cmpop then
 | 
						|
            second_cmp64bit
 | 
						|
        else
 | 
						|
            second_add64bit;
 | 
						|
 | 
						|
        { free used register (except the result register) }
 | 
						|
        clear_left_right(cmpop);
 | 
						|
     end;
 | 
						|
 | 
						|
 | 
						|
 | 
						|
    procedure tcgaddnode.second_add64bit;
 | 
						|
      var
 | 
						|
        op         : TOpCG;
 | 
						|
        unsigned   : boolean;
 | 
						|
        checkoverflow : boolean;
 | 
						|
 | 
						|
      begin
 | 
						|
 | 
						|
        unsigned:=((left.resulttype.def.deftype=orddef) and
 | 
						|
                   (torddef(left.resulttype.def).typ=u64bit)) or
 | 
						|
                  ((right.resulttype.def.deftype=orddef) and
 | 
						|
                   (torddef(right.resulttype.def).typ=u64bit));
 | 
						|
        { 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;
 | 
						|
 | 
						|
        location_reset(location,LOC_REGISTER,def_cgsize(resulttype.def));
 | 
						|
 | 
						|
        load_left_right(false,(cs_check_overflow in aktlocalswitches) and
 | 
						|
            (nodetype in [addn,subn]));
 | 
						|
 | 
						|
        case nodetype of
 | 
						|
              xorn,orn,andn,addn:
 | 
						|
                begin
 | 
						|
                  if (location.registerlow.enum = R_NO) then
 | 
						|
                    begin
 | 
						|
                      location.registerlow := rg.getregisterint(exprasmlist,OS_INT);
 | 
						|
                      location.registerhigh := rg.getregisterint(exprasmlist,OS_INT);
 | 
						|
                    end;
 | 
						|
 | 
						|
                  if (left.location.loc = LOC_CONSTANT) then
 | 
						|
                    swapleftright;
 | 
						|
                  if (right.location.loc = LOC_CONSTANT) then
 | 
						|
                    cg64.a_op64_const_reg_reg(exprasmlist,op,right.location.valueqword,
 | 
						|
                      left.location.register64,location.register64)
 | 
						|
                  else
 | 
						|
                    cg64.a_op64_reg_reg_reg(exprasmlist,op,right.location.register64,
 | 
						|
                      left.location.register64,location.register64);
 | 
						|
                end;
 | 
						|
              subn:
 | 
						|
                begin
 | 
						|
                  if (nf_swaped in flags) then
 | 
						|
                    swapleftright;
 | 
						|
 | 
						|
                  if left.location.loc <> LOC_CONSTANT then
 | 
						|
                    begin
 | 
						|
                      if (location.registerlow.enum = R_NO) then
 | 
						|
                        begin
 | 
						|
                         location.registerlow := rg.getregisterint(exprasmlist,OS_INT);
 | 
						|
                         location.registerhigh := rg.getregisterint(exprasmlist,OS_INT);
 | 
						|
                      end;
 | 
						|
                      if right.location.loc <> LOC_CONSTANT then
 | 
						|
                        // reg64 - reg64
 | 
						|
                        cg64.a_op64_reg_reg_reg(exprasmlist,OP_SUB,
 | 
						|
                          right.location.register64,left.location.register64,
 | 
						|
                          location.register64)
 | 
						|
                      else
 | 
						|
                        // reg64 - const64
 | 
						|
                        cg64.a_op64_const_reg_reg(exprasmlist,OP_SUB,
 | 
						|
                          right.location.valueqword,left.location.register64,
 | 
						|
                          location.register64)
 | 
						|
                    end
 | 
						|
                  else
 | 
						|
                    begin
 | 
						|
                      // const64 - reg64
 | 
						|
                      location_force_reg(exprasmlist,left.location,
 | 
						|
                        def_cgsize(left.resulttype.def),true);
 | 
						|
                      if (left.location.loc = LOC_REGISTER) then
 | 
						|
                        location.register64 := left.location.register64
 | 
						|
                      else if (location.registerlow.enum = R_NO) then
 | 
						|
                        begin
 | 
						|
                         location.registerlow := rg.getregisterint(exprasmlist,OS_INT);
 | 
						|
                         location.registerhigh := rg.getregisterint(exprasmlist,OS_INT);
 | 
						|
                        end;
 | 
						|
                      cg64.a_op64_reg_reg_reg(exprasmlist,OP_SUB,
 | 
						|
                        right.location.register64,left.location.register64,
 | 
						|
                        location.register64);
 | 
						|
                     end;
 | 
						|
                end;
 | 
						|
              else
 | 
						|
                internalerror(2002072803);
 | 
						|
            end;
 | 
						|
 | 
						|
        { emit overflow check if enabled }
 | 
						|
        if checkoverflow then
 | 
						|
           cg.g_overflowcheck(exprasmlist,self);
 | 
						|
 | 
						|
      end;
 | 
						|
 | 
						|
{*****************************************************************************
 | 
						|
                                Floats
 | 
						|
*****************************************************************************}
 | 
						|
 | 
						|
    procedure tcgaddnode.second_opfloat;
 | 
						|
     begin
 | 
						|
     end;
 | 
						|
 | 
						|
{*****************************************************************************
 | 
						|
                                Ordinals
 | 
						|
*****************************************************************************}
 | 
						|
 | 
						|
    procedure tcgaddnode.second_addordinal;
 | 
						|
     var
 | 
						|
      unsigned : boolean;
 | 
						|
      checkoverflow : boolean;
 | 
						|
      cgop : topcg;
 | 
						|
      tmpreg : tregister;
 | 
						|
      size:Tcgsize;
 | 
						|
     begin
 | 
						|
       size:=def_cgsize(resulttype.def);
 | 
						|
       { set result location }
 | 
						|
       location_reset(location,LOC_REGISTER,size);
 | 
						|
 | 
						|
       { determine if the comparison will be unsigned }
 | 
						|
       unsigned:=not(is_signed(left.resulttype.def)) or
 | 
						|
                   not(is_signed(right.resulttype.def));
 | 
						|
 | 
						|
       { load values into registers  }
 | 
						|
       load_left_right(false, (cs_check_overflow in aktlocalswitches) and
 | 
						|
          (nodetype in [addn,subn,muln]));
 | 
						|
 | 
						|
       if (location.register.enum = R_NO) then
 | 
						|
         location.register := rg.getregisterint(exprasmlist,OS_INT);
 | 
						|
 | 
						|
       { 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 (left.location.loc = LOC_CONSTANT) then
 | 
						|
           swapleftright;
 | 
						|
         if (right.location.loc <> LOC_CONSTANT) then
 | 
						|
           cg.a_op_reg_reg_reg(exprasmlist,cgop,OS_INT,
 | 
						|
            left.location.register,right.location.register,
 | 
						|
            location.register)
 | 
						|
         else
 | 
						|
           cg.a_op_const_reg_reg(exprasmlist,cgop,OS_INT,
 | 
						|
            aword(right.location.value),left.location.register,
 | 
						|
            location.register);
 | 
						|
       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(exprasmlist,OP_SUB,OS_INT,
 | 
						|
                 right.location.register,left.location.register,
 | 
						|
                 location.register)
 | 
						|
             else
 | 
						|
                cg.a_op_const_reg_reg(exprasmlist,OP_SUB,OS_INT,
 | 
						|
                aword(right.location.value),left.location.register,
 | 
						|
                 location.register);
 | 
						|
           end
 | 
						|
         else
 | 
						|
           begin
 | 
						|
             tmpreg := cg.get_scratch_reg_int(exprasmlist,OS_INT);
 | 
						|
             cg.a_load_const_reg(exprasmlist,OS_INT,
 | 
						|
               aword(left.location.value),tmpreg);
 | 
						|
             cg.a_op_reg_reg_reg(exprasmlist,OP_SUB,OS_INT,
 | 
						|
               right.location.register,tmpreg,location.register);
 | 
						|
             cg.free_scratch_reg(exprasmlist,tmpreg);
 | 
						|
           end;
 | 
						|
       end;
 | 
						|
 | 
						|
       { emit overflow check if required }
 | 
						|
       if checkoverflow then
 | 
						|
        cg.g_overflowcheck(exprasmlist,self);
 | 
						|
     end;
 | 
						|
 | 
						|
{*****************************************************************************
 | 
						|
                                pass_2
 | 
						|
*****************************************************************************}
 | 
						|
 | 
						|
    procedure tcgaddnode.pass_2;
 | 
						|
    { is also being used for xor, and "mul", "sub, or and comparative }
 | 
						|
    { operators                                                }
 | 
						|
      var
 | 
						|
         cmpop      : boolean;
 | 
						|
         cgop       : topcg;
 | 
						|
         op         : tasmop;
 | 
						|
         tmpreg     : tregister;
 | 
						|
 | 
						|
         { true, if unsigned types are compared }
 | 
						|
         unsigned : boolean;
 | 
						|
 | 
						|
         regstopush: tregisterset;
 | 
						|
 | 
						|
      begin
 | 
						|
         { to make it more readable, string and set (not smallset!) have their
 | 
						|
           own procedures }
 | 
						|
         case left.resulttype.def.deftype of
 | 
						|
           orddef :
 | 
						|
             begin
 | 
						|
               { handling boolean expressions }
 | 
						|
               if is_boolean(left.resulttype.def) and
 | 
						|
                  is_boolean(right.resulttype.def) then
 | 
						|
                 begin
 | 
						|
                   second_opboolean;
 | 
						|
                   exit;
 | 
						|
                 end
 | 
						|
               { 64bit operations }
 | 
						|
               else if is_64bit(left.resulttype.def) then
 | 
						|
                 begin
 | 
						|
                   second_op64bit;
 | 
						|
                   exit;
 | 
						|
                 end;
 | 
						|
             end;
 | 
						|
           stringdef :
 | 
						|
             begin
 | 
						|
               { this should already be handled in pass1 }
 | 
						|
               internalerror(2002072402);
 | 
						|
               exit;
 | 
						|
             end;
 | 
						|
           setdef :
 | 
						|
             begin
 | 
						|
               { normalsets are already handled in pass1 }
 | 
						|
               if (tsetdef(left.resulttype.def).settype<>smallset) then
 | 
						|
                internalerror(200109041);
 | 
						|
               second_opsmallset;
 | 
						|
               exit;
 | 
						|
             end;
 | 
						|
           arraydef :
 | 
						|
             begin
 | 
						|
{$ifdef SUPPORT_MMX}
 | 
						|
               if is_mmx_able_array(left.resulttype.def) then
 | 
						|
                begin
 | 
						|
                  second_opmmx;
 | 
						|
                  exit;
 | 
						|
                end;
 | 
						|
{$endif SUPPORT_MMX}
 | 
						|
             end;
 | 
						|
           floatdef :
 | 
						|
             begin
 | 
						|
               second_opfloat;
 | 
						|
               exit;
 | 
						|
             end;
 | 
						|
         end;
 | 
						|
 | 
						|
         {*********************** ordinals / integrals *******************}
 | 
						|
 | 
						|
         cmpop:=nodetype in [ltn,lten,gtn,gten,equaln,unequaln];
 | 
						|
 | 
						|
         { normally nothing should be in flags   }
 | 
						|
         if (left.location.loc = LOC_FLAGS) or
 | 
						|
            (right.location.loc = LOC_FLAGS) then
 | 
						|
           internalerror(2002072602);
 | 
						|
 | 
						|
 | 
						|
         pass_left_and_right;
 | 
						|
 | 
						|
         if cmpop then
 | 
						|
             second_cmpordinal
 | 
						|
         else
 | 
						|
             second_addordinal;
 | 
						|
 | 
						|
        { free used register (except the result register) }
 | 
						|
        clear_left_right(cmpop);
 | 
						|
      end;
 | 
						|
 | 
						|
begin
 | 
						|
   caddnode:=tcgaddnode;
 | 
						|
end.
 | 
						|
{
 | 
						|
  $Log$
 | 
						|
  Revision 1.8  2003-04-23 20:16:04  peter
 | 
						|
    + added currency support based on int64
 | 
						|
    + is_64bit for use in cg units instead of is_64bitint
 | 
						|
    * removed cgmessage from n386add, replace with internalerrors
 | 
						|
 | 
						|
  Revision 1.7  2003/04/22 23:50:22  peter
 | 
						|
    * firstpass uses expectloc
 | 
						|
    * checks if there are differences between the expectloc and
 | 
						|
      location.loc from secondpass in EXTDEBUG
 | 
						|
 | 
						|
  Revision 1.6  2003/02/19 22:00:14  daniel
 | 
						|
    * Code generator converted to new register notation
 | 
						|
    - Horribily outdated todo.txt removed
 | 
						|
 | 
						|
  Revision 1.5  2003/02/02 19:25:54  carl
 | 
						|
    * Several bugfixes for m68k target (register alloc., opcode emission)
 | 
						|
    + VIS target
 | 
						|
    + Generic add more complete (still not verified)
 | 
						|
 | 
						|
  Revision 1.4  2003/01/08 18:43:56  daniel
 | 
						|
   * Tregister changed into a record
 | 
						|
 | 
						|
  Revision 1.3  2002/12/14 15:02:03  carl
 | 
						|
    * maxoperands -> max_operands (for portability in rautils.pas)
 | 
						|
    * fix some range-check errors with loadconst
 | 
						|
    + add ncgadd unit to m68k
 | 
						|
    * some bugfix of a_param_reg with LOC_CREFERENCE
 | 
						|
 | 
						|
  Revision 1.2  2002/12/08 15:02:17  carl
 | 
						|
    + more fixes
 | 
						|
 | 
						|
  Revision 1.1  2002/12/07 19:51:35  carl
 | 
						|
    + first version (uncompilable!)
 | 
						|
 | 
						|
}
 |