fpc/compiler/i386/cgai386.pas

{
    $Id$
    Copyright (c) 1998-2000 by Florian Klaempfl

    Helper routines for the i386 code generator

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 ****************************************************************************
}

unit cgai386;

{$i defines.inc}

interface

    uses
       cobjects,
       cpubase,cpuasm,
       symconst,symtype,symdef,aasm;

{$define TESTGETTEMP to store const that
 are written into temps for later release PM }

    function def_opsize(p1:pdef):topsize;
    function def2def_opsize(p1,p2:pdef):topsize;
    function def_getreg(p1:pdef):tregister;
    function makereg8(r:tregister):tregister;
    function makereg16(r:tregister):tregister;
    function makereg32(r:tregister):tregister;


    procedure locflags2reg(var l:tlocation;opsize:topsize);
    procedure locjump2reg(var l:tlocation;opsize:topsize; otl, ofl: pasmlabel);


    procedure emitlab(var l : pasmlabel);
    procedure emitjmp(c : tasmcond;var l : pasmlabel);
    procedure emit_flag2reg(flag:tresflags;hregister:tregister);

    procedure emit_none(i : tasmop;s : topsize);

    procedure emit_const(i : tasmop;s : topsize;c : longint);
    procedure emit_reg(i : tasmop;s : topsize;reg : tregister);
    procedure emit_ref(i : tasmop;s : topsize;ref : preference);

    procedure emit_const_reg(i : tasmop;s : topsize;c : longint;reg : tregister);
    procedure emit_const_ref(i : tasmop;s : topsize;c : longint;ref : preference);
    procedure emit_ref_reg(i : tasmop;s : topsize;ref : preference;reg : tregister);
    procedure emit_reg_ref(i : tasmop;s : topsize;reg : tregister;ref : preference);
    procedure emit_reg_reg(i : tasmop;s : topsize;reg1,reg2 : tregister);

    procedure emit_const_reg_reg(i : tasmop;s : topsize;c : longint;reg1,reg2 : tregister);
    procedure emit_reg_reg_reg(i : tasmop;s : topsize;reg1,reg2,reg3 : tregister);


    procedure emit_sym(i : tasmop;s : topsize;op : pasmsymbol);
    procedure emit_sym_ofs(i : tasmop;s : topsize;op : pasmsymbol;ofs : longint);
    procedure emit_sym_ofs_reg(i : tasmop;s : topsize;op : pasmsymbol;ofs:longint;reg : tregister);
    procedure emit_sym_ofs_ref(i : tasmop;s : topsize;op : pasmsymbol;ofs:longint;ref : preference);

    procedure emitcall(const routine:string);

    procedure emit_mov_loc_ref(const t:tlocation;const ref:treference;siz:topsize;freetemp:boolean);
    procedure emit_mov_loc_reg(const t:tlocation;reg:tregister);
    procedure emit_mov_ref_reg64(r : treference;rl,rh : tregister);
    procedure emit_lea_loc_ref(const t:tlocation;const ref:treference;freetemp:boolean);
    procedure emit_lea_loc_reg(const t:tlocation;reg:tregister;freetemp:boolean);
    procedure emit_push_loc(const t:tlocation);
    procedure emit_push_mem_size(const t: treference; size: longint);

    { pushes qword location to the stack }
    procedure emit_pushq_loc(const t : tlocation);
    procedure release_qword_loc(const t : tlocation);

    { remove non regvar registers in loc from regs (in the format }
    { pushusedregisters uses)                                     }
    procedure remove_non_regvars_from_loc(const t: tlocation; var regs: byte);
    { releases the registers of a location }
    procedure release_loc(const t : tlocation);

    procedure emit_pushw_loc(const t:tlocation);
    procedure emit_push_lea_loc(const t:tlocation;freetemp:boolean);
    procedure emit_to_mem(var t:tlocation;def:pdef);
    procedure emit_to_reg16(var hr:tregister);
    procedure emit_to_reg32(var hr:tregister);
    procedure emit_mov_reg_loc(reg: TRegister; const t:tlocation);
    procedure emit_movq_reg_loc(reghigh,reglow: TRegister;t:tlocation);

    procedure copyshortstring(const dref,sref : treference;len : byte;
                        loadref, del_sref: boolean);

    procedure finalize(t : pdef;const ref : treference;is_already_ref : boolean);
    procedure incrstringref(t : pdef;const ref : treference);
    procedure decrstringref(t : pdef;const ref : treference);

    procedure push_int(l : longint);
    procedure emit_push_mem(const ref : treference);
    procedure emitpushreferenceaddr(const ref : treference);

    procedure incrcomintfref(t: pdef; const ref: treference);
    procedure decrcomintfref(t: pdef; const ref: treference);

    procedure floatload(t : tfloattype;const ref : treference);
    procedure floatstore(t : tfloattype;const ref : treference);
    procedure floatloadops(t : tfloattype;var op : tasmop;var s : topsize);
    procedure floatstoreops(t : tfloattype;var op : tasmop;var s : topsize);

    procedure maybe_loadesi;
    procedure emitloadord2reg(const location:Tlocation;orddef:Porddef;destreg:Tregister;delloc:boolean);
    procedure concatcopy(source,dest : treference;size : longint;delsource : boolean;loadref:boolean);

    procedure genentrycode(alist : TAAsmoutput;make_global:boolean;
                           stackframe:longint;
                           var parasize:longint;var nostackframe:boolean;
                           inlined : boolean);
    procedure genexitcode(alist : TAAsmoutput;parasize:longint;
                          nostackframe,inlined:boolean);

    { if a unit doesn't have a explicit init/final code,  }
    { we've to generate one, if the units has ansistrings }
    { in the interface or implementation                  }
    procedure genimplicitunitfinal(alist : TAAsmoutput);
    procedure genimplicitunitinit(alist : TAAsmoutput);
{$ifdef test_dest_loc}

const
  { used to avoid temporary assignments }
  dest_loc_known : boolean = false;
  in_dest_loc    : boolean = false;
  dest_loc_tree  : ptree = nil;

var
  dest_loc : tlocation;

procedure mov_reg_to_dest(p : ptree; s : topsize; reg : tregister);

{$endif test_dest_loc}


implementation

    uses
{$ifdef delphi}
       sysutils,
{$else}
       strings,
{$endif}
       cutils,
       globtype,systems,globals,verbose,
       fmodule,
       symbase,symsym,symtable,types,
       tgcpu,temp_gen,hcodegen,regvars
{$ifdef GDB}
       ,gdb
{$endif}
{$ifndef NOTARGETWIN32}
       ,t_win32
{$endif}
       ;


{*****************************************************************************
                                Helpers
*****************************************************************************}

    function def_opsize(p1:pdef):topsize;
      begin
        case p1^.size of
         1 : def_opsize:=S_B;
         2 : def_opsize:=S_W;
         4 : def_opsize:=S_L;
        else
         internalerror(130820001);
        end;
      end;


    function def2def_opsize(p1,p2:pdef):topsize;
      var
        o1 : topsize;
      begin
        case p1^.size of
         1 : o1:=S_B;
         2 : o1:=S_W;
         4 : o1:=S_L;
         { I don't know if we need it (FK) }
         8 : o1:=S_L;
        else
         internalerror(130820002);
        end;
        if assigned(p2) then
         begin
           case p2^.size of
            1 : o1:=S_B;
            2 : begin
                  if o1=S_B then
                   o1:=S_BW
                  else
                   o1:=S_W;
                end;
            4,8:
              begin
                 case o1 of
                    S_B : o1:=S_BL;
                    S_W : o1:=S_WL;
                 end;
              end;
           end;
         end;
        def2def_opsize:=o1;
      end;


    function def_getreg(p1:pdef):tregister;
      begin
        case p1^.size of
         1 : def_getreg:=reg32toreg8(getregister32);
         2 : def_getreg:=reg32toreg16(getregister32);
         4 : def_getreg:=getregister32;
        else
         internalerror(130820003);
        end;
      end;


    function makereg8(r:tregister):tregister;
      begin
        case r of
          R_EAX,R_EBX,R_ECX,R_EDX,R_EDI,R_ESI,R_ESP :
            makereg8:=reg32toreg8(r);
          R_AX,R_BX,R_CX,R_DX,R_DI,R_SI,R_SP :
            makereg8:=reg16toreg8(r);
          R_AL,R_BL,R_CL,R_DL :
            makereg8:=r;
        end;
      end;


    function makereg16(r:tregister):tregister;
      begin
        case r of
          R_EAX,R_EBX,R_ECX,R_EDX,R_EDI,R_ESI,R_ESP :
            makereg16:=reg32toreg16(r);
          R_AX,R_BX,R_CX,R_DX,R_DI,R_SI,R_SP :
            makereg16:=r;
          R_AL,R_BL,R_CL,R_DL :
            makereg16:=reg8toreg16(r);
        end;
      end;


    function makereg32(r:tregister):tregister;
      begin
        case r of
          R_EAX,R_EBX,R_ECX,R_EDX,R_EDI,R_ESI,R_ESP :
            makereg32:=r;
          R_AX,R_BX,R_CX,R_DX,R_DI,R_SI,R_SP :
            makereg32:=reg16toreg32(r);
          R_AL,R_BL,R_CL,R_DL :
            makereg32:=reg8toreg32(r);
        end;
      end;


    procedure locflags2reg(var l:tlocation;opsize:topsize);
      var
        hregister : tregister;
      begin
        if (l.loc=LOC_FLAGS) then
         begin
           hregister:=getregister32;
           case opsize of
            S_W : hregister:=reg32toreg16(hregister);
            S_B : hregister:=reg32toreg8(hregister);
           end;
           emit_flag2reg(l.resflags,hregister);
           l.loc:=LOC_REGISTER;
           l.register:=hregister;
         end
        else internalerror(270720001);
      end;


    procedure locjump2reg(var l:tlocation;opsize:topsize; otl, ofl: pasmlabel);
      var
        hregister : tregister;
        hl : pasmlabel;
      begin
         if l.loc = LOC_JUMP then
           begin
             hregister:=getregister32;
             case opsize of
               S_W : hregister:=reg32toreg16(hregister);
               S_B : hregister:=reg32toreg8(hregister);
             end;
             l.loc:=LOC_REGISTER;
             l.register:=hregister;
             emitlab(truelabel);
             truelabel:=otl;
             emit_const_reg(A_MOV,opsize,1,hregister);
             getlabel(hl);
             emitjmp(C_None,hl);
             emitlab(falselabel);
             falselabel:=ofl;
             emit_reg_reg(A_XOR,S_L,makereg32(hregister),
             makereg32(hregister));
             emitlab(hl);
           end
        else internalerror(270720002);
      end;


{*****************************************************************************
                              Emit Assembler
*****************************************************************************}

    procedure emitlab(var l : pasmlabel);
      begin
         if not l^.is_set then
          exprasmList.concat(Tai_label.Create(l))
         else
          internalerror(7453984);
      end;

    procedure emitjmp(c : tasmcond;var l : pasmlabel);
      var
        ai : taicpu;
      begin
        if c=C_None then
          ai := Taicpu.Op_sym(A_JMP,S_NO,l)
        else
          begin
            ai:=Taicpu.Op_sym(A_Jcc,S_NO,l);
            ai.SetCondition(c);
          end;
        ai.is_jmp:=true;
        exprasmList.concat(ai);
      end;


    procedure emit_flag2reg(flag:tresflags;hregister:tregister);
      var
        ai : taicpu;
        hreg : tregister;
      begin
         hreg:=makereg8(hregister);
         ai:=Taicpu.Op_reg(A_Setcc,S_B,hreg);
         ai.SetCondition(flag_2_cond[flag]);
         exprasmList.concat(ai);
         if hreg<>hregister then
          begin
            if hregister in regset16bit then
             emit_to_reg16(hreg)
            else
             emit_to_reg32(hreg);
          end;
      end;


    procedure emit_none(i : tasmop;s : topsize);
      begin
         exprasmList.concat(Taicpu.Op_none(i,s));
      end;

    procedure emit_reg(i : tasmop;s : topsize;reg : tregister);
      begin
         exprasmList.concat(Taicpu.Op_reg(i,s,reg));
      end;

    procedure emit_ref(i : tasmop;s : topsize;ref : preference);
      begin
         exprasmList.concat(Taicpu.Op_ref(i,s,ref));
      end;

    procedure emit_const(i : tasmop;s : topsize;c : longint);
      begin
         exprasmList.concat(Taicpu.Op_const(i,s,c));
      end;

    procedure emit_const_reg(i : tasmop;s : topsize;c : longint;reg : tregister);
      begin
         exprasmList.concat(Taicpu.Op_const_reg(i,s,c,reg));
      end;

    procedure emit_const_ref(i : tasmop;s : topsize;c : longint;ref : preference);
      begin
         exprasmList.concat(Taicpu.Op_const_ref(i,s,c,ref));
      end;

    procedure emit_ref_reg(i : tasmop;s : topsize;ref : preference;reg : tregister);
      begin
         exprasmList.concat(Taicpu.Op_ref_reg(i,s,ref,reg));
      end;

    procedure emit_reg_ref(i : tasmop;s : topsize;reg : tregister;ref : preference);
      begin
         exprasmList.concat(Taicpu.Op_reg_ref(i,s,reg,ref));
      end;

    procedure emit_reg_reg(i : tasmop;s : topsize;reg1,reg2 : tregister);
      begin
         if (reg1<>reg2) or (i<>A_MOV) then
           exprasmList.concat(Taicpu.Op_reg_reg(i,s,reg1,reg2));
      end;

    procedure emit_const_reg_reg(i : tasmop;s : topsize;c : longint;reg1,reg2 : tregister);
      begin
         exprasmList.concat(Taicpu.Op_const_reg_reg(i,s,c,reg1,reg2));
      end;

    procedure emit_reg_reg_reg(i : tasmop;s : topsize;reg1,reg2,reg3 : tregister);
      begin
         exprasmList.concat(Taicpu.Op_reg_reg_reg(i,s,reg1,reg2,reg3));
      end;

    procedure emit_sym(i : tasmop;s : topsize;op : pasmsymbol);
      begin
        exprasmList.concat(Taicpu.Op_sym(i,s,op));
      end;

    procedure emit_sym_ofs(i : tasmop;s : topsize;op : pasmsymbol;ofs : longint);
      begin
        exprasmList.concat(Taicpu.Op_sym_ofs(i,s,op,ofs));
      end;

    procedure emit_sym_ofs_reg(i : tasmop;s : topsize;op : pasmsymbol;ofs:longint;reg : tregister);
      begin
        exprasmList.concat(Taicpu.Op_sym_ofs_reg(i,s,op,ofs,reg));
      end;

    procedure emit_sym_ofs_ref(i : tasmop;s : topsize;op : pasmsymbol;ofs:longint;ref : preference);
      begin
        exprasmList.concat(Taicpu.Op_sym_ofs_ref(i,s,op,ofs,ref));
      end;

    procedure emitcall(const routine:string);
      begin
        exprasmList.concat(Taicpu.Op_sym(A_CALL,S_NO,newasmsymbol(routine)));
      end;

    { only usefull in startup code }
    procedure emitinsertcall(const routine:string);
      begin
        exprasmList.insert(Taicpu.Op_sym(A_CALL,S_NO,newasmsymbol(routine)));
      end;


    procedure emit_mov_loc_ref(const t:tlocation;const ref:treference;siz:topsize;freetemp:boolean);
      var
        hreg : tregister;
        pushedeax : boolean;

      begin
        pushedeax:=false;
        case t.loc of
          LOC_REGISTER,
         LOC_CREGISTER : begin
                           exprasmList.concat(Taicpu.Op_reg_ref(A_MOV,siz,
                             t.register,newreference(ref)));
                           ungetregister32(t.register); { the register is not needed anymore }
                         end;
               LOC_MEM,
         LOC_REFERENCE : begin
                           if t.reference.is_immediate then
                             emit_const_ref(A_MOV,siz,
                               t.reference.offset,newreference(ref))
                           else
                             begin
                               case siz of
                                 S_B : begin
                                          { we can't do a getregister in the code generator }
                                          { without problems!!!                             }
                                          if usablereg32>0 then
                                            hreg:=reg32toreg8(getregister32)
                                          else
                                            begin
                                               emit_reg(A_PUSH,S_L,R_EAX);
                                               pushedeax:=true;
                                               hreg:=R_AL;
                                            end;
                                       end;
                                 S_W : hreg:=R_DI;
                                 S_L : hreg:=R_EDI;
                               end;
                               if hreg in [R_DI,R_EDI] then
                                 getexplicitregister32(R_EDI);
                               emit_ref_reg(A_MOV,siz,
                                 newreference(t.reference),hreg);
                               del_reference(t.reference);
                               exprasmList.concat(Taicpu.Op_reg_ref(A_MOV,siz,
                                 hreg,newreference(ref)));
                               if siz=S_B then
                                 begin
                                    if pushedeax then
                                      emit_reg(A_POP,S_L,R_EAX)
                                    else
                                      ungetregister(hreg);
                                 end;
                               if hreg in [R_DI,R_EDI] then
                                 ungetregister32(R_EDI);
                               { we can release the registers }
                               { but only AFTER the MOV! Important for the optimizer!
                                 (JM)}
                               del_reference(ref);
                             end;
                           if freetemp then
                            ungetiftemp(t.reference);
                         end;
        else
         internalerror(330);
        end;
      end;


    procedure emit_mov_loc_reg(const t:tlocation;reg:tregister);
      begin
        case t.loc of
          LOC_REGISTER,
         LOC_CREGISTER : begin
                           emit_reg_reg(A_MOV,S_L,t.register,reg);
                           ungetregister32(t.register); { the register is not needed anymore }
                         end;
               LOC_MEM,
         LOC_REFERENCE : begin
                           if t.reference.is_immediate then
                             emit_const_reg(A_MOV,S_L,
                               t.reference.offset,reg)
                           else
                             begin
                               emit_ref_reg(A_MOV,S_L,
                                 newreference(t.reference),reg);
                             end;
                         end;
        else
         internalerror(330);
        end;
      end;

    procedure emit_mov_reg_loc(reg: TRegister; const t:tlocation);
      begin
        case t.loc of
          LOC_REGISTER,
         LOC_CREGISTER : begin
                           emit_reg_reg(A_MOV,RegSize(Reg),
                             reg,t.register);
                         end;
               LOC_MEM,
         LOC_REFERENCE : begin
                           if t.reference.is_immediate then
                             internalerror(334)
                           else
                             begin
                               exprasmList.concat(Taicpu.Op_reg_ref(A_MOV,RegSize(Reg),
                                 Reg,newreference(t.reference)));
                             end;
                         end;
        else
         internalerror(330);
        end;
      end;


    procedure emit_lea_loc_reg(const t:tlocation;reg:tregister;freetemp:boolean);
      begin
        case t.loc of
               LOC_MEM,
         LOC_REFERENCE : begin
                           if t.reference.is_immediate then
                             internalerror(331)
                           else
                             begin
                               emit_ref_reg(A_LEA,S_L,
                                 newreference(t.reference),reg);
                             end;
                           if freetemp then
                            ungetiftemp(t.reference);
                         end;
        else
         internalerror(332);
        end;
      end;


    procedure emit_movq_reg_loc(reghigh,reglow: TRegister;t:tlocation);
      begin
        case t.loc of
          LOC_REGISTER,
         LOC_CREGISTER : begin
                           emit_reg_reg(A_MOV,S_L,
                             reglow,t.registerlow);
                           emit_reg_reg(A_MOV,S_L,
                             reghigh,t.registerhigh);
                         end;
               LOC_MEM,
         LOC_REFERENCE : begin
                           if t.reference.is_immediate then
                             internalerror(334)
                           else
                             begin
                               exprasmList.concat(Taicpu.Op_reg_ref(A_MOV,S_L,
                                 Reglow,newreference(t.reference)));
                               inc(t.reference.offset,4);
                               exprasmList.concat(Taicpu.Op_reg_ref(A_MOV,S_L,
                                 Reghigh,newreference(t.reference)));
                             end;
                         end;
        else
         internalerror(330);
        end;
      end;


   procedure emit_pushq_loc(const t : tlocation);

      var
         hr : preference;

      begin
         case t.loc of
            LOC_REGISTER,
            LOC_CREGISTER:
              begin
                 exprasmList.concat(Taicpu.Op_reg(A_PUSH,S_L,
                   t.registerhigh));
                 exprasmList.concat(Taicpu.Op_reg(A_PUSH,S_L,
                   t.registerlow));
              end;
            LOC_MEM,
            LOC_REFERENCE:
              begin
                 hr:=newreference(t.reference);
                 inc(hr^.offset,4);
                 exprasmList.concat(Taicpu.Op_ref(A_PUSH,S_L,
                   hr));
                 exprasmList.concat(Taicpu.Op_ref(A_PUSH,S_L,
                   newreference(t.reference)));
                 ungetiftemp(t.reference);
              end;
            else internalerror(331);
         end;
      end;

    procedure remove_non_regvars_from_loc(const t: tlocation; var regs: byte);
    begin
      case t.loc of
        LOC_REGISTER:
          { can't be a regvar, since it would be LOC_CREGISTER then }
          regs := regs and not($80 shr byte(t.register));
        LOC_MEM,LOC_REFERENCE:
          begin
            if not(cs_regalloc in aktglobalswitches) or
               (t.reference.base in usableregs) then
              regs := regs and
                not($80 shr byte(t.reference.base));
            if not(cs_regalloc in aktglobalswitches) or
               (t.reference.index in usableregs) then
              regs := regs and
                not($80 shr byte(t.reference.index));
          end;
      end;
    end;


    procedure release_loc(const t : tlocation);

      begin
         case t.loc of
            LOC_REGISTER,
            LOC_CREGISTER:
              begin
                 ungetregister32(t.register);
              end;
            LOC_MEM,
            LOC_REFERENCE:
              del_reference(t.reference);
            else internalerror(332);
         end;
      end;

    procedure release_qword_loc(const t : tlocation);
      begin
         case t.loc of
            LOC_REGISTER,
            LOC_CREGISTER:
              begin
                 ungetregister32(t.registerhigh);
                 ungetregister32(t.registerlow);
              end;
            LOC_MEM,
            LOC_REFERENCE:
              del_reference(t.reference);
            else internalerror(331);
         end;
      end;


    procedure emit_push_loc(const t:tlocation);
      begin
        case t.loc of
          LOC_REGISTER,
         LOC_CREGISTER : begin
                           exprasmList.concat(Taicpu.Op_reg(A_PUSH,S_L,makereg32(t.register)));
                           ungetregister(t.register); { the register is not needed anymore }
                         end;
               LOC_MEM,
         LOC_REFERENCE : begin
                           if t.reference.is_immediate then
                             exprasmList.concat(Taicpu.Op_const(A_PUSH,S_L,t.reference.offset))
                           else
                             exprasmList.concat(Taicpu.Op_ref(A_PUSH,S_L,newreference(t.reference)));
                           del_reference(t.reference);
                           ungetiftemp(t.reference);
                         end;
        else
         internalerror(330);
        end;
      end;


    procedure emit_pushw_loc(const t:tlocation);
      var
        opsize : topsize;
      begin
        case t.loc of
          LOC_REGISTER,
         LOC_CREGISTER : begin
                           if target_os.stackalignment=4 then
                             exprasmList.concat(Taicpu.Op_reg(A_PUSH,S_L,makereg32(t.register)))
                           else
                             exprasmList.concat(Taicpu.Op_reg(A_PUSH,S_W,makereg16(t.register)));
                           ungetregister(t.register); { the register is not needed anymore }
                         end;
               LOC_MEM,
         LOC_REFERENCE : begin
                           if target_os.stackalignment=4 then
                            opsize:=S_L
                           else
                            opsize:=S_W;
                           if t.reference.is_immediate then
                             exprasmList.concat(Taicpu.Op_const(A_PUSH,opsize,t.reference.offset))
                           else
                             exprasmList.concat(Taicpu.Op_ref(A_PUSH,opsize,newreference(t.reference)));
                           del_reference(t.reference);
                           ungetiftemp(t.reference);
                         end;
        else
         internalerror(330);
        end;
      end;


    procedure emit_lea_loc_ref(const t:tlocation;const ref:treference;freetemp:boolean);
      begin
        case t.loc of
               LOC_MEM,
         LOC_REFERENCE : begin
                           if t.reference.is_immediate then
                             internalerror(331)
                           else
                             begin
                               getexplicitregister32(R_EDI);
                               emit_ref_reg(A_LEA,S_L,
                                 newreference(t.reference),R_EDI);
                               exprasmList.concat(Taicpu.Op_reg_ref(A_MOV,S_L,
                                 R_EDI,newreference(ref)));
                               ungetregister32(R_EDI);
                             end;
                            { release the registers }
                            del_reference(t.reference);
                           if freetemp then
                            ungetiftemp(t.reference);
                         end;
        else
         internalerror(332);
        end;
      end;


    procedure emit_push_lea_loc(const t:tlocation;freetemp:boolean);
      begin
        case t.loc of
               LOC_MEM,
         LOC_REFERENCE : begin
                           if t.reference.is_immediate then
                             internalerror(331)
                           else
                             begin
                               getexplicitregister32(R_EDI);
                               emit_ref_reg(A_LEA,S_L,
                                 newreference(t.reference),R_EDI);
                               exprasmList.concat(Taicpu.Op_reg(A_PUSH,S_L,R_EDI));
                               ungetregister32(R_EDI);
                             end;
                           if freetemp then
                            ungetiftemp(t.reference);
                         end;
        else
         internalerror(332);
        end;
      end;

    procedure emit_push_mem_size(const t: treference; size: longint);

      var
        s: topsize;

      begin
        if t.is_immediate then
          begin
            if (size=4) or
               (target_os.stackalignment=4) then
              exprasmList.concat(Taicpu.Op_const(A_PUSH,S_L,t.offset))
            else
              exprasmList.concat(Taicpu.Op_const(A_PUSH,S_W,t.offset));
          end
        else
          if size < 4 then
            begin
              getexplicitregister32(R_EDI);
              case size of
                1: s := S_BL;
                2: s := S_WL;
                else internalerror(200008071);
              end;
              exprasmList.concat(Taicpu.Op_ref_reg(A_MOVZX,s,
                newreference(t),R_EDI));
              if target_os.stackalignment=4 then
                exprasmList.concat(Taicpu.Op_reg(A_PUSH,S_L,R_EDI))
              else
                exprasmList.concat(Taicpu.Op_reg(A_PUSH,S_W,R_DI));
              ungetregister32(R_EDI);
            end
          else
            if size = 4 then
              emit_push_mem(t)
            else
              internalerror(200008072);
      end;


    procedure emit_to_mem(var t:tlocation;def:pdef);

      var
         r : treference;

      begin
        case t.loc of
               LOC_FPU : begin
                           reset_reference(t.reference);
                           gettempofsizereference(10,t.reference);
                           floatstore(pfloatdef(def)^.typ,t.reference);
                         end;
               LOC_REGISTER:
                 begin
                    if is_64bitint(def) then
                      begin
                         gettempofsizereference(8,r);
                         emit_reg_ref(A_MOV,S_L,t.registerlow,newreference(r));
                         inc(r.offset,4);
                         emit_reg_ref(A_MOV,S_L,t.registerhigh,newreference(r));
                         dec(r.offset,4);
                         t.reference:=r;
                      end
                    else
                      internalerror(1405001);
                 end;
               LOC_MEM,
         LOC_REFERENCE : ;
         LOC_CFPUREGISTER : begin
                           emit_reg(A_FLD,S_NO,correct_fpuregister(t.register,fpuvaroffset));
                           inc(fpuvaroffset);
                           reset_reference(t.reference);
                           gettempofsizereference(10,t.reference);
                           floatstore(pfloatdef(def)^.typ,t.reference);
                         end;
         else
         internalerror(333);
        end;
        t.loc:=LOC_MEM;
      end;


    procedure emit_to_reg16(var hr:tregister);
      begin
        { ranges are a little bit bug sensitive ! }
        case hr of
           R_EAX,R_EBX,R_ECX,R_EDX,R_EDI,R_ESI,R_ESP,R_EBP:
             begin
               hr:=reg32toreg16(hr);
             end;
           R_AL,R_BL,R_CL,R_DL:
             begin
               hr:=reg8toreg16(hr);
               emit_const_reg(A_AND,S_W,$ff,hr);
             end;
           R_AH,R_BH,R_CH,R_DH:
             begin
               hr:=reg8toreg16(hr);
               emit_const_reg(A_AND,S_W,$ff00,hr);
             end;
        end;
      end;


    procedure emit_to_reg32(var hr:tregister);
      begin
        { ranges are a little bit bug sensitive ! }
        case hr of
           R_AX,R_BX,R_CX,R_DX,R_DI,R_SI,R_SP,R_BP:
             begin
                hr:=reg16toreg32(hr);
                emit_const_reg(A_AND,S_L,$ffff,hr);
             end;
           R_AL,R_BL,R_CL,R_DL:
             begin
                hr:=reg8toreg32(hr);
                emit_const_reg(A_AND,S_L,$ff,hr);
             end;
           R_AH,R_BH,R_CH,R_DH:
             begin
                hr:=reg8toreg32(hr);
                emit_const_reg(A_AND,S_L,$ff00,hr);
             end;
        end;
      end;

    procedure emit_mov_ref_reg64(r : treference;rl,rh : tregister);

      var
         hr : preference;

      begin
         { if we load a 64 bit reference, we must be careful because }
         { we could overwrite the registers of the reference by      }
         { accident                                                  }
         getexplicitregister32(R_EDI);
         if r.base=rl then
           begin
              emit_reg_reg(A_MOV,S_L,r.base,
                R_EDI);
              r.base:=R_EDI;
           end
         else if r.index=rl then
           begin
              emit_reg_reg(A_MOV,S_L,r.index,
                R_EDI);
              r.index:=R_EDI;
           end;
         emit_ref_reg(A_MOV,S_L,
           newreference(r),rl);
         hr:=newreference(r);
         inc(hr^.offset,4);
         emit_ref_reg(A_MOV,S_L,
           hr,rh);
         ungetregister32(R_EDI);
      end;

{*****************************************************************************
                           Emit String Functions
*****************************************************************************}

    procedure incrcomintfref(t: pdef; const ref: treference);

      var
         pushedregs : tpushed;

      begin
         pushusedregisters(pushedregs,$ff);
         emit_ref(A_PUSH,S_L,newreference(ref));
         saveregvars($ff);
         if is_interfacecom(t) then
           emitcall('FPC_INTF_INCR_REF')
         else
           internalerror(1859);
         popusedregisters(pushedregs);
      end;


    procedure decrcomintfref(t: pdef; const ref: treference);

      var
         pushedregs : tpushed;

      begin
         pushusedregisters(pushedregs,$ff);
         emitpushreferenceaddr(ref);
         saveregvars($ff);
         if is_interfacecom(t) then
           begin
              emitcall('FPC_INTF_DECR_REF');
           end
         else internalerror(1859);
         popusedregisters(pushedregs);
      end;



    procedure copyshortstring(const dref,sref : treference;len : byte;
                loadref, del_sref: boolean);
      begin
         emitpushreferenceaddr(dref);
          { if it's deleted right before it's used, the optimizer can move }
          { the reg deallocations to the right places (JM)                 }
         if del_sref then
           del_reference(sref);
         if loadref then
          emit_push_mem(sref)
         else
          emitpushreferenceaddr(sref);
         push_int(len);
         emitcall('FPC_SHORTSTR_COPY');
         maybe_loadesi;
      end;

    procedure copylongstring(const dref,sref : treference;len : longint;loadref:boolean);
      begin
         emitpushreferenceaddr(dref);
         if loadref then
          emit_push_mem(sref)
         else
          emitpushreferenceaddr(sref);
         push_int(len);
         saveregvars($ff);
         emitcall('FPC_LONGSTR_COPY');
         maybe_loadesi;
      end;


    procedure incrstringref(t : pdef;const ref : treference);

      var
         pushedregs : tpushed;

      begin
         pushusedregisters(pushedregs,$ff);
         emitpushreferenceaddr(ref);
         saveregvars($ff);
         if is_ansistring(t) then
           begin
              emitcall('FPC_ANSISTR_INCR_REF');
           end
         else if is_widestring(t) then
           begin
              emitcall('FPC_WIDESTR_INCR_REF');
           end
         else internalerror(1859);
         popusedregisters(pushedregs);
      end;


    procedure decrstringref(t : pdef;const ref : treference);

      var
         pushedregs : tpushed;

      begin
         pushusedregisters(pushedregs,$ff);
         emitpushreferenceaddr(ref);
         saveregvars($ff);
         if is_ansistring(t) then
           begin
              emitcall('FPC_ANSISTR_DECR_REF');
           end
         else if is_widestring(t) then
           begin
              emitcall('FPC_WIDESTR_DECR_REF');
           end
         else internalerror(1859);
         popusedregisters(pushedregs);
      end;

{*****************************************************************************
                           Emit Push Functions
*****************************************************************************}

    procedure push_int(l : longint);
      begin
         if (l = 0) and
            not(aktoptprocessor in [Class386, ClassP6]) and
            not(cs_littlesize in aktglobalswitches)
           Then
             begin
               getexplicitregister32(R_EDI);
               emit_reg_reg(A_XOR,S_L,R_EDI,R_EDI);
               exprasmList.concat(Taicpu.Op_reg(A_PUSH,S_L,R_EDI));
               ungetregister32(R_EDI);
             end
           else
             exprasmList.concat(Taicpu.Op_const(A_PUSH,S_L,l));
      end;

    procedure emit_push_mem(const ref : treference);

      begin
         if ref.is_immediate then
           push_int(ref.offset)
         else
           begin
             if not(aktoptprocessor in [Class386, ClassP6]) and
                not(cs_littlesize in aktglobalswitches)
               then
                 begin
                   getexplicitregister32(R_EDI);
                   emit_ref_reg(A_MOV,S_L,newreference(ref),R_EDI);
                   exprasmList.concat(Taicpu.Op_reg(A_PUSH,S_L,R_EDI));
                   ungetregister32(R_EDI);
                 end
               else exprasmList.concat(Taicpu.Op_ref(A_PUSH,S_L,newreference(ref)));
           end;
      end;


    procedure emitpushreferenceaddr(const ref : treference);
      var
        href : treference;
      begin
         { this will fail for references to other segments !!! }
         if ref.is_immediate then
         { is this right ? }
           begin
              { push_int(ref.offset)}
              gettempofsizereference(4,href);
              emit_const_ref(A_MOV,S_L,ref.offset,newreference(href));
              emitpushreferenceaddr(href);
              del_reference(href);
           end
         else
           begin
              if ref.segment<>R_NO then
                CGMessage(cg_e_cant_use_far_pointer_there);
              if (ref.base=R_NO) and (ref.index=R_NO) then
                exprasmList.concat(Taicpu.Op_sym_ofs(A_PUSH,S_L,ref.symbol,ref.offset))
              else if (ref.base=R_NO) and (ref.index<>R_NO) and
                 (ref.offset=0) and (ref.scalefactor=0) and (ref.symbol=nil) then
                exprasmList.concat(Taicpu.Op_reg(A_PUSH,S_L,ref.index))
              else if (ref.base<>R_NO) and (ref.index=R_NO) and
                 (ref.offset=0) and (ref.symbol=nil) then
                exprasmList.concat(Taicpu.Op_reg(A_PUSH,S_L,ref.base))
              else
                begin
                   getexplicitregister32(R_EDI);
                   emit_ref_reg(A_LEA,S_L,newreference(ref),R_EDI);
                   exprasmList.concat(Taicpu.Op_reg(A_PUSH,S_L,R_EDI));
                   ungetregister32(R_EDI);
                end;
           end;
        end;


{*****************************************************************************
                           Emit Float Functions
*****************************************************************************}

    procedure floatloadops(t : tfloattype;var op : tasmop;var s : topsize);
      begin
         case t of
            s32real : begin
                         op:=A_FLD;
                         s:=S_FS;
                      end;
            s64real : begin
                         op:=A_FLD;
                         { ???? }
                         s:=S_FL;
                      end;
            s80real : begin
                         op:=A_FLD;
                         s:=S_FX;
                      end;
            s64comp : begin
                         op:=A_FILD;
                         s:=S_IQ;
                      end;
            else internalerror(17);
         end;
      end;


    procedure floatload(t : tfloattype;const ref : treference);
      var
         op : tasmop;
         s : topsize;
      begin
         floatloadops(t,op,s);
         exprasmList.concat(Taicpu.Op_ref(op,s,
           newreference(ref)));
         inc(fpuvaroffset);
      end;


    procedure floatstoreops(t : tfloattype;var op : tasmop;var s : topsize);
      begin
         case t of
            s32real : begin
                         op:=A_FSTP;
                         s:=S_FS;
                      end;
            s64real : begin
                         op:=A_FSTP;
                         s:=S_FL;
                      end;
            s80real : begin
                         op:=A_FSTP;
                          s:=S_FX;
                      end;
            s64comp : begin
                         op:=A_FISTP;
                         s:=S_IQ;
                      end;
         else
           internalerror(17);
         end;
      end;


    procedure floatstore(t : tfloattype;const ref : treference);
      var
         op : tasmop;
         s : topsize;
      begin
         floatstoreops(t,op,s);
         exprasmList.concat(Taicpu.Op_ref(op,s,
           newreference(ref)));
         dec(fpuvaroffset);
      end;


{*****************************************************************************
                           Emit Functions
*****************************************************************************}

    procedure concatcopy(source,dest : treference;size : longint;delsource,loadref : boolean);

      const
         isizes : array[0..3] of topsize=(S_L,S_B,S_W,S_B);
         ishr : array[0..3] of byte=(2,0,1,0);

      var
         ecxpushed : boolean;
         helpsize : longint;
         i : byte;
         reg8,reg32 : tregister;
         swap : boolean;

         procedure maybepushecx;
         begin
           if not(R_ECX in unused) then
             begin
               exprasmList.concat(Taicpu.Op_reg(A_PUSH,S_L,R_ECX));
               ecxpushed:=true;
             end
           else getexplicitregister32(R_ECX);
         end;

      begin
{$IfNDef regallocfix}
        If delsource then
           del_reference(source);
{$EndIf regallocfix}
         if (not loadref) and
            ((size<=8) or
             (not(cs_littlesize in aktglobalswitches ) and (size<=12))) then
           begin
              helpsize:=size shr 2;
              getexplicitregister32(R_EDI);
              for i:=1 to helpsize do
                begin
                   emit_ref_reg(A_MOV,S_L,newreference(source),R_EDI);
{$ifdef regallocfix}
                   If (size = 4) and delsource then
                     del_reference(source);
{$endif regallocfix}
                   exprasmList.concat(Taicpu.Op_reg_ref(A_MOV,S_L,R_EDI,newreference(dest)));
                   inc(source.offset,4);
                   inc(dest.offset,4);
                   dec(size,4);
                end;
              if size>1 then
                begin
                   emit_ref_reg(A_MOV,S_W,newreference(source),R_DI);
{$ifdef regallocfix}
                   If (size = 2) and delsource then
                     del_reference(source);
{$endif regallocfix}
                   exprasmList.concat(Taicpu.Op_reg_ref(A_MOV,S_W,R_DI,newreference(dest)));
                   inc(source.offset,2);
                   inc(dest.offset,2);
                   dec(size,2);
                end;
              ungetregister32(R_EDI);
              if size>0 then
                begin
                   { and now look for an 8 bit register }
                   swap:=false;
                   if R_EAX in unused then reg8:=reg32toreg8(getexplicitregister32(R_EAX))
                   else if R_EDX in unused then reg8:=reg32toreg8(getexplicitregister32(R_EDX))
                   else if R_EBX in unused then reg8:=reg32toreg8(getexplicitregister32(R_EBX))
                   else if R_ECX in unused then reg8:=reg32toreg8(getexplicitregister32(R_ECX))
                   else
                      begin
                         swap:=true;
                         { we need only to check 3 registers, because }
                         { one is always not index or base          }
                         if (dest.base<>R_EAX) and (dest.index<>R_EAX) then
                           begin
                              reg8:=R_AL;
                              reg32:=R_EAX;
                           end
                         else if (dest.base<>R_EBX) and (dest.index<>R_EBX) then
                           begin
                              reg8:=R_BL;
                              reg32:=R_EBX;
                           end
                         else if (dest.base<>R_ECX) and (dest.index<>R_ECX) then
                           begin
                              reg8:=R_CL;
                              reg32:=R_ECX;
                           end;
                      end;
                   if swap then
                     { was earlier XCHG, of course nonsense }
                     begin
                       getexplicitregister32(R_EDI);
                       emit_reg_reg(A_MOV,S_L,reg32,R_EDI);
                     end;
                   emit_ref_reg(A_MOV,S_B,newreference(source),reg8);
{$ifdef regallocfix}
                   If delsource then
                     del_reference(source);
{$endif regallocfix}
                   exprasmList.concat(Taicpu.Op_reg_ref(A_MOV,S_B,reg8,newreference(dest)));
                   if swap then
                     begin
                       emit_reg_reg(A_MOV,S_L,R_EDI,reg32);
                       ungetregister32(R_EDI);
                     end
                   else
                     ungetregister(reg8);
                end;
           end
         else
           begin
              getexplicitregister32(R_EDI);
              emit_ref_reg(A_LEA,S_L,newreference(dest),R_EDI);
{$ifdef regallocfix}
             {is this ok?? (JM)}
              del_reference(dest);
{$endif regallocfix}
              exprasmList.concat(Tairegalloc.Alloc(R_ESI));
              if loadref then
                emit_ref_reg(A_MOV,S_L,newreference(source),R_ESI)
              else
                begin
                  emit_ref_reg(A_LEA,S_L,newreference(source),R_ESI);
{$ifdef regallocfix}
                  if delsource then
                    del_reference(source);
{$endif regallocfix}
                end;

              exprasmList.concat(Taicpu.Op_none(A_CLD,S_NO));
              ecxpushed:=false;
              if cs_littlesize in aktglobalswitches  then
                begin
                   maybepushecx;
                   emit_const_reg(A_MOV,S_L,size,R_ECX);
                   exprasmList.concat(Taicpu.Op_none(A_REP,S_NO));
                   exprasmList.concat(Taicpu.Op_none(A_MOVSB,S_NO));
                end
              else
                begin
                   helpsize:=size shr 2;
                   size:=size and 3;
                   if helpsize>1 then
                    begin
                      maybepushecx;
                      emit_const_reg(A_MOV,S_L,helpsize,R_ECX);
                      exprasmList.concat(Taicpu.Op_none(A_REP,S_NO));
                    end;
                   if helpsize>0 then
                    exprasmList.concat(Taicpu.Op_none(A_MOVSD,S_NO));
                   if size>1 then
                     begin
                        dec(size,2);
                        exprasmList.concat(Taicpu.Op_none(A_MOVSW,S_NO));
                     end;
                   if size=1 then
                     exprasmList.concat(Taicpu.Op_none(A_MOVSB,S_NO));
                end;
              ungetregister32(R_EDI);
              exprasmList.concat(Tairegalloc.DeAlloc(R_ESI));
              if ecxpushed then
                exprasmList.concat(Taicpu.Op_reg(A_POP,S_L,R_ECX))
              else
                ungetregister32(R_ECX);

              { loading SELF-reference again }
              maybe_loadesi;
           end;
         if delsource then
           ungetiftemp(source);
      end;


    procedure emitloadord2reg(const location:Tlocation;orddef:Porddef;
                              destreg:Tregister;delloc:boolean);

    {A lot smaller and less bug sensitive than the original unfolded loads.}

    var tai:Taicpu;
        r:Preference;

    begin
        tai := nil;
        case location.loc of
            LOC_REGISTER,LOC_CREGISTER:
                begin
                    case orddef^.typ of
                        u8bit:
                            tai:=Taicpu.Op_reg_reg(A_MOVZX,S_BL,location.register,destreg);
                        s8bit:
                            tai:=Taicpu.Op_reg_reg(A_MOVSX,S_BL,location.register,destreg);
                        u16bit:
                            tai:=Taicpu.Op_reg_reg(A_MOVZX,S_WL,location.register,destreg);
                        s16bit:
                            tai:=Taicpu.Op_reg_reg(A_MOVSX,S_WL,location.register,destreg);
                        u32bit,s32bit:
                            if location.register <> destreg then
                              tai:=Taicpu.Op_reg_reg(A_MOV,S_L,location.register,destreg);
                    end;
                    if delloc then
                        ungetregister(location.register);
                end;
            LOC_MEM,
            LOC_REFERENCE:
                begin
                    if location.reference.is_immediate then
                     tai:=Taicpu.Op_const_reg(A_MOV,S_L,location.reference.offset,destreg)
                    else
                     begin
                       r:=newreference(location.reference);
                       case orddef^.typ of
                         u8bit:
                            tai:=Taicpu.Op_ref_reg(A_MOVZX,S_BL,r,destreg);
                         s8bit:
                            tai:=Taicpu.Op_ref_reg(A_MOVSX,S_BL,r,destreg);
                         u16bit:
                            tai:=Taicpu.Op_ref_reg(A_MOVZX,S_WL,r,destreg);
                         s16bit:
                            tai:=Taicpu.Op_ref_reg(A_MOVSX,S_WL,r,destreg);
                         u32bit:
                            tai:=Taicpu.Op_ref_reg(A_MOV,S_L,r,destreg);
                         s32bit:
                            tai:=Taicpu.Op_ref_reg(A_MOV,S_L,r,destreg);
                       end;
                     end;
                    if delloc then
                        del_reference(location.reference);
                end
            else
                internalerror(6);
        end;
        if assigned(tai) then
          exprasmList.concat(tai);
    end;

    { if necessary ESI is reloaded after a call}
    procedure maybe_loadesi;

      var
         hp : preference;
         p : pprocinfo;
         i : longint;

      begin
         if assigned(procinfo^._class) then
           begin
              exprasmList.concat(Tairegalloc.Alloc(R_ESI));
              if lexlevel>normal_function_level then
                begin
                   new(hp);
                   reset_reference(hp^);
                   hp^.offset:=procinfo^.framepointer_offset;
                   hp^.base:=procinfo^.framepointer;
                   emit_ref_reg(A_MOV,S_L,hp,R_ESI);
                   p:=procinfo^.parent;
                   for i:=3 to lexlevel-1 do
                     begin
                        new(hp);
                        reset_reference(hp^);
                        hp^.offset:=p^.framepointer_offset;
                        hp^.base:=R_ESI;
                        emit_ref_reg(A_MOV,S_L,hp,R_ESI);
                        p:=p^.parent;
                     end;
                   new(hp);
                   reset_reference(hp^);
                   hp^.offset:=p^.selfpointer_offset;
                   hp^.base:=R_ESI;
                   emit_ref_reg(A_MOV,S_L,hp,R_ESI);
                end
              else
                begin
                   new(hp);
                   reset_reference(hp^);
                   hp^.offset:=procinfo^.selfpointer_offset;
                   hp^.base:=procinfo^.framepointer;
                   emit_ref_reg(A_MOV,S_L,hp,R_ESI);
                end;
           end;
      end;


{*****************************************************************************
                            Entry/Exit Code Functions
*****************************************************************************}

  procedure genprofilecode;
    var
      pl : pasmlabel;
    begin
      if (po_assembler in aktprocsym^.definition^.procoptions) then
       exit;
      case target_info.target of
         target_i386_freebsd,
         target_i386_linux:
           begin
              getaddrlabel(pl);
              emitinsertcall('mcount');
              usedinproc:=usedinproc or ($80 shr byte(R_EDX));
              exprasmList.insert(Taicpu.Op_sym_ofs_reg(A_MOV,S_L,pl,0,R_EDX));
              exprasmList.insert(Tai_section.Create(sec_code));
              exprasmList.insert(Tai_const.Create_32bit(0));
              exprasmList.insert(Tai_label.Create(pl));
              exprasmList.insert(Tai_align.Create(4));
              exprasmList.insert(Tai_section.Create(sec_data));
           end;

         target_i386_go32v2:
           begin
              emitinsertcall('MCOUNT');
           end;
      end;
    end;


    procedure generate_interrupt_stackframe_entry;
      begin
         { save the registers of an interrupt procedure }
         exprasmList.insert(Taicpu.Op_reg(A_PUSH,S_L,R_EAX));
         exprasmList.insert(Taicpu.Op_reg(A_PUSH,S_L,R_EBX));
         exprasmList.insert(Taicpu.Op_reg(A_PUSH,S_L,R_ECX));
         exprasmList.insert(Taicpu.Op_reg(A_PUSH,S_L,R_EDX));
         exprasmList.insert(Taicpu.Op_reg(A_PUSH,S_L,R_ESI));
         exprasmList.insert(Taicpu.Op_reg(A_PUSH,S_L,R_EDI));

         { .... also the segment registers }
         exprasmList.insert(Taicpu.Op_reg(A_PUSH,S_W,R_DS));
         exprasmList.insert(Taicpu.Op_reg(A_PUSH,S_W,R_ES));
         exprasmList.insert(Taicpu.Op_reg(A_PUSH,S_W,R_FS));
         exprasmList.insert(Taicpu.Op_reg(A_PUSH,S_W,R_GS));
      end;


    procedure generate_interrupt_stackframe_exit;
      begin
         { restore the registers of an interrupt procedure }
         { this was all with entrycode instead of exitcode !!}
         procinfo^.aktexitcode.concat(Taicpu.Op_reg(A_POP,S_L,R_EAX));
         procinfo^.aktexitcode.concat(Taicpu.Op_reg(A_POP,S_L,R_EBX));
         procinfo^.aktexitcode.concat(Taicpu.Op_reg(A_POP,S_L,R_ECX));
         procinfo^.aktexitcode.concat(Taicpu.Op_reg(A_POP,S_L,R_EDX));
         procinfo^.aktexitcode.concat(Taicpu.Op_reg(A_POP,S_L,R_ESI));
         procinfo^.aktexitcode.concat(Taicpu.Op_reg(A_POP,S_L,R_EDI));

         { .... also the segment registers }
         procinfo^.aktexitcode.concat(Taicpu.Op_reg(A_POP,S_W,R_DS));
         procinfo^.aktexitcode.concat(Taicpu.Op_reg(A_POP,S_W,R_ES));
         procinfo^.aktexitcode.concat(Taicpu.Op_reg(A_POP,S_W,R_FS));
         procinfo^.aktexitcode.concat(Taicpu.Op_reg(A_POP,S_W,R_GS));

        { this restores the flags }
         procinfo^.aktexitcode.concat(Taicpu.Op_none(A_IRET,S_NO));
      end;


  { generates the code for threadvar initialisation }
  procedure initialize_threadvar(p : pnamedindexobject);{$ifndef FPC}far;{$endif}

    var
       hr : treference;

    begin
       if (psym(p)^.typ=varsym) and
          (vo_is_thread_var in pvarsym(p)^.varoptions) then
         begin
            exprasmList.concat(Taicpu.Op_const(A_PUSH,S_L,pvarsym(p)^.getsize));
            reset_reference(hr);
            hr.symbol:=newasmsymbol(pvarsym(p)^.mangledname);
            emitpushreferenceaddr(hr);
            saveregvars($ff);
            emitcall('FPC_INIT_THREADVAR');
         end;
    end;

    { initilizes data of type t                           }
    { if is_already_ref is true then the routines assumes }
    { that r points to the data to initialize             }
    procedure initialize(t : pdef;const ref : treference;is_already_ref : boolean);

      var
         hr : treference;

      begin
         if is_ansistring(t) or
           is_widestring(t) or
           is_interfacecom(t) then
           begin
              emit_const_ref(A_MOV,S_L,0,
                newreference(ref));
           end
         else
           begin
              reset_reference(hr);
              hr.symbol:=pstoreddef(t)^.get_inittable_label;
              emitpushreferenceaddr(hr);
              if is_already_ref then
                exprasmList.concat(Taicpu.Op_ref(A_PUSH,S_L,
                  newreference(ref)))
              else
                emitpushreferenceaddr(ref);
              emitcall('FPC_INITIALIZE');
           end;
      end;

    { finalizes data of type t                            }
    { if is_already_ref is true then the routines assumes }
    { that r points to the data to finalizes              }
    procedure finalize(t : pdef;const ref : treference;is_already_ref : boolean);

      var
         r : treference;

      begin
         if is_ansistring(t) or
           is_widestring(t) then
           begin
              decrstringref(t,ref);
           end
         else if is_interfacecom(t) then
           begin
              decrcomintfref(t,ref);
           end
         else
           begin
              reset_reference(r);
              r.symbol:=pstoreddef(t)^.get_inittable_label;
              emitpushreferenceaddr(r);
              if is_already_ref then
                exprasmList.concat(Taicpu.Op_ref(A_PUSH,S_L,
                  newreference(ref)))
              else
                emitpushreferenceaddr(ref);
              emitcall('FPC_FINALIZE');
           end;
      end;


  { generates the code for initialisation of local data }
  procedure initialize_data(p : pnamedindexobject);{$ifndef FPC}far;{$endif}

    var
       hr : treference;

    begin
       if (psym(p)^.typ=varsym) and
          assigned(pvarsym(p)^.vartype.def) and
          not(is_class(pvarsym(p)^.vartype.def)) and
          pvarsym(p)^.vartype.def^.needs_inittable then
         begin
            if assigned(procinfo) then
              procinfo^.flags:=procinfo^.flags or pi_needs_implicit_finally;
            reset_reference(hr);
            if psym(p)^.owner^.symtabletype in [localsymtable,inlinelocalsymtable] then
              begin
                 hr.base:=procinfo^.framepointer;
                 hr.offset:=-pvarsym(p)^.address+pvarsym(p)^.owner^.address_fixup;
              end
            else
              begin
                 hr.symbol:=newasmsymbol(pvarsym(p)^.mangledname);
              end;
            initialize(pvarsym(p)^.vartype.def,hr,false);
         end;
    end;

  { generates the code for incrementing the reference count of parameters and
    initialize out parameters }
  procedure init_paras(p : pnamedindexobject);{$ifndef FPC}far;{$endif}

    var
       hrv : treference;
       hr: treference;

    begin
       if (psym(p)^.typ=varsym) and
          not is_class(pvarsym(p)^.vartype.def) and
          pvarsym(p)^.vartype.def^.needs_inittable then
         begin
           if (pvarsym(p)^.varspez=vs_value) then
             begin
               procinfo^.flags:=procinfo^.flags or pi_needs_implicit_finally;

               reset_reference(hrv);
               hrv.base:=procinfo^.framepointer;
               hrv.offset:=pvarsym(p)^.address+procinfo^.para_offset;

               if is_ansistring(pvarsym(p)^.vartype.def) or
                  is_widestring(pvarsym(p)^.vartype.def) then
                 begin
                   incrstringref(pvarsym(p)^.vartype.def,hrv)
                 end
               else if is_interfacecom(pvarsym(p)^.vartype.def) then
                 begin
                   incrcomintfref(pvarsym(p)^.vartype.def,hrv)
                 end
               else
                 begin
                   reset_reference(hr);
                   hr.symbol:=pstoreddef(pvarsym(p)^.vartype.def)^.get_inittable_label;
                   emitpushreferenceaddr(hr);
                   emitpushreferenceaddr(hrv);
                   emitcall('FPC_ADDREF');
                 end;
             end
           else if (pvarsym(p)^.varspez=vs_out) then
             begin
               reset_reference(hrv);
               hrv.base:=procinfo^.framepointer;
               hrv.offset:=pvarsym(p)^.address+procinfo^.para_offset;
               {$ifndef noAllocEdi}
               getexplicitregister32(R_EDI);
               {$endif noAllocEdi}
               exprasmList.concat(Taicpu.Op_ref_reg(A_MOV,S_L,newreference(hrv),R_EDI));
               reset_reference(hr);
               hr.base:=R_EDI;
               initialize(pvarsym(p)^.vartype.def,hr,false);
             end;
         end;
    end;

  { generates the code for decrementing the reference count of parameters }
  procedure final_paras(p : pnamedindexobject);{$ifndef FPC}far;{$endif}

    var
       hrv : treference;
       hr: treference;

    begin
       if (psym(p)^.typ=varsym) and
          not is_class(pvarsym(p)^.vartype.def) and
          pvarsym(p)^.vartype.def^.needs_inittable then
         begin
           if (pvarsym(p)^.varspez=vs_value) then
             begin
               procinfo^.flags:=procinfo^.flags or pi_needs_implicit_finally;

               reset_reference(hrv);
               hrv.base:=procinfo^.framepointer;
               hrv.offset:=pvarsym(p)^.address+procinfo^.para_offset;

               if is_ansistring(pvarsym(p)^.vartype.def) or
                  is_widestring(pvarsym(p)^.vartype.def) then
                 begin
                   decrstringref(pvarsym(p)^.vartype.def,hrv)
                 end
               else if is_interfacecom(pvarsym(p)^.vartype.def) then
                 begin
                   decrcomintfref(pvarsym(p)^.vartype.def,hrv)
                 end
               else
                 begin
                   reset_reference(hr);
                   hr.symbol:=pstoreddef(pvarsym(p)^.vartype.def)^.get_inittable_label;
                   emitpushreferenceaddr(hr);
                   emitpushreferenceaddr(hrv);
                   emitcall('FPC_DECREF');
                 end;
             end;
         end;
    end;


  { generates the code for finalisation of local data }
  procedure finalize_data(p : pnamedindexobject);{$ifndef FPC}far;{$endif}

    var
       hr : treference;

    begin
       if (psym(p)^.typ=varsym) and
          assigned(pvarsym(p)^.vartype.def) and
          not(is_class(pvarsym(p)^.vartype.def)) and
          pvarsym(p)^.vartype.def^.needs_inittable then
         begin
            if assigned(procinfo) then
              procinfo^.flags:=procinfo^.flags or pi_needs_implicit_finally;
            reset_reference(hr);
            case psym(p)^.owner^.symtabletype of
               localsymtable,inlinelocalsymtable:
                 begin
                    hr.base:=procinfo^.framepointer;
                    hr.offset:=-pvarsym(p)^.address+pvarsym(p)^.owner^.address_fixup;
                 end;
               else
                 hr.symbol:=newasmsymbol(pvarsym(p)^.mangledname);
            end;
            finalize(pvarsym(p)^.vartype.def,hr,false);
         end;
    end;


  { generates the code to make local copies of the value parameters }
  procedure copyvalueparas(p : pnamedindexobject);{$ifndef fpc}far;{$endif}
    var
      href1,href2 : treference;
      r    : preference;
      power,len  : longint;
      opsize : topsize;
      again,ok : pasmlabel;
    begin
       if (psym(p)^.typ=varsym) and
          (pvarsym(p)^.varspez=vs_value) and
          (push_addr_param(pvarsym(p)^.vartype.def)) then
        begin
          if is_open_array(pvarsym(p)^.vartype.def) or
             is_array_of_const(pvarsym(p)^.vartype.def) then
           begin
              { get stack space }
              new(r);
              reset_reference(r^);
              r^.base:=procinfo^.framepointer;
              r^.offset:=pvarsym(p)^.address+4+procinfo^.para_offset;
              getexplicitregister32(R_EDI);
              exprasmList.concat(Taicpu.op_ref_reg(A_MOV,S_L,r,R_EDI));
              exprasmList.concat(Taicpu.op_reg(A_INC,S_L,R_EDI));
              if (parraydef(pvarsym(p)^.vartype.def)^.elesize<>1) then
               begin
                 if ispowerof2(parraydef(pvarsym(p)^.vartype.def)^.elesize, power) then
                   exprasmList.concat(Taicpu.op_const_reg(A_SHL,S_L,power,R_EDI))
                 else
                   exprasmList.concat(Taicpu.op_const_reg(A_IMUL,S_L,
                     parraydef(pvarsym(p)^.vartype.def)^.elesize,R_EDI));
               end;
{$ifndef NOTARGETWIN32}
              { windows guards only a few pages for stack growing, }
              { so we have to access every page first              }
              if target_os.id=os_i386_win32 then
                begin
                   getlabel(again);
                   getlabel(ok);
                   emitlab(again);
                   exprasmList.concat(Taicpu.op_const_reg(A_CMP,S_L,winstackpagesize,R_EDI));
                   emitjmp(C_C,ok);
                   exprasmList.concat(Taicpu.op_const_reg(A_SUB,S_L,winstackpagesize-4,R_ESP));
                   exprasmList.concat(Taicpu.op_reg(A_PUSH,S_L,R_EAX));
                   exprasmList.concat(Taicpu.op_const_reg(A_SUB,S_L,winstackpagesize,R_EDI));
                   emitjmp(C_None,again);

                   emitlab(ok);
                   exprasmList.concat(Taicpu.op_reg_reg(A_SUB,S_L,R_EDI,R_ESP));
                   ungetregister32(R_EDI);
                   { now reload EDI }
                   new(r);
                   reset_reference(r^);
                   r^.base:=procinfo^.framepointer;
                   r^.offset:=pvarsym(p)^.address+4+procinfo^.para_offset;
                   getexplicitregister32(R_EDI);
                   exprasmList.concat(Taicpu.op_ref_reg(A_MOV,S_L,r,R_EDI));

                   exprasmList.concat(Taicpu.op_reg(A_INC,S_L,R_EDI));

                   if (parraydef(pvarsym(p)^.vartype.def)^.elesize<>1) then
                    begin
                      if ispowerof2(parraydef(pvarsym(p)^.vartype.def)^.elesize, power) then
                        exprasmList.concat(Taicpu.op_const_reg(A_SHL,S_L,power,R_EDI))
                      else
                        exprasmList.concat(Taicpu.op_const_reg(A_IMUL,S_L,
                          parraydef(pvarsym(p)^.vartype.def)^.elesize,R_EDI));
                    end;
                end
              else
{$endif NOTARGETWIN32}
                exprasmList.concat(Taicpu.op_reg_reg(A_SUB,S_L,R_EDI,R_ESP));
              { load destination }
              exprasmList.concat(Taicpu.op_reg_reg(A_MOV,S_L,R_ESP,R_EDI));

              { don't destroy the registers! }
              exprasmList.concat(Taicpu.op_reg(A_PUSH,S_L,R_ECX));
              exprasmList.concat(Taicpu.op_reg(A_PUSH,S_L,R_ESI));

              { load count }
              new(r);
              reset_reference(r^);
              r^.base:=procinfo^.framepointer;
              r^.offset:=pvarsym(p)^.address+4+procinfo^.para_offset;
              exprasmList.concat(Taicpu.op_ref_reg(A_MOV,S_L,r,R_ECX));

              { load source }
              new(r);
              reset_reference(r^);
              r^.base:=procinfo^.framepointer;
              r^.offset:=pvarsym(p)^.address+procinfo^.para_offset;
              exprasmList.concat(Taicpu.op_ref_reg(A_MOV,S_L,r,R_ESI));

              { scheduled .... }
              exprasmList.concat(Taicpu.op_reg(A_INC,S_L,R_ECX));

              { calculate size }
              len:=parraydef(pvarsym(p)^.vartype.def)^.elesize;
              opsize:=S_B;
              if (len and 3)=0 then
               begin
                 opsize:=S_L;
                 len:=len shr 2;
               end
              else
               if (len and 1)=0 then
                begin
                  opsize:=S_W;
                  len:=len shr 1;
                end;

              if ispowerof2(len, power) then
                exprasmList.concat(Taicpu.op_const_reg(A_SHL,S_L,power,R_ECX))
              else
                exprasmList.concat(Taicpu.op_const_reg(A_IMUL,S_L,len,R_ECX));
              exprasmList.concat(Taicpu.op_none(A_REP,S_NO));
              case opsize of
                S_B : exprasmList.concat(Taicpu.Op_none(A_MOVSB,S_NO));
                S_W : exprasmList.concat(Taicpu.Op_none(A_MOVSW,S_NO));
                S_L : exprasmList.concat(Taicpu.Op_none(A_MOVSD,S_NO));
              end;
              ungetregister32(R_EDI);
              exprasmList.concat(Taicpu.op_reg(A_POP,S_L,R_ESI));
              exprasmList.concat(Taicpu.op_reg(A_POP,S_L,R_ECX));

              { patch the new address }
              new(r);
              reset_reference(r^);
              r^.base:=procinfo^.framepointer;
              r^.offset:=pvarsym(p)^.address+procinfo^.para_offset;
              exprasmList.concat(Taicpu.op_reg_ref(A_MOV,S_L,R_ESP,r));
           end
          else
           if is_shortstring(pvarsym(p)^.vartype.def) then
            begin
              reset_reference(href1);
              href1.base:=procinfo^.framepointer;
              href1.offset:=pvarsym(p)^.address+procinfo^.para_offset;
              reset_reference(href2);
              href2.base:=procinfo^.framepointer;
              href2.offset:=-pvarsym(p)^.localvarsym^.address+pvarsym(p)^.localvarsym^.owner^.address_fixup;
              copyshortstring(href2,href1,pstringdef(pvarsym(p)^.vartype.def)^.len,true,false);
            end
           else
            begin
              reset_reference(href1);
              href1.base:=procinfo^.framepointer;
              href1.offset:=pvarsym(p)^.address+procinfo^.para_offset;
              reset_reference(href2);
              href2.base:=procinfo^.framepointer;
              href2.offset:=-pvarsym(p)^.localvarsym^.address+pvarsym(p)^.localvarsym^.owner^.address_fixup;
              concatcopy(href1,href2,pvarsym(p)^.vartype.def^.size,true,true);
            end;
        end;
    end;

  procedure inittempvariables;

    var
       hp : ptemprecord;
       r : preference;

    begin
       hp:=templist;
       while assigned(hp) do
         begin
           if hp^.temptype in [tt_ansistring,tt_freeansistring,tt_interfacecom] then
             begin
               procinfo^.flags:=procinfo^.flags or pi_needs_implicit_finally;
               new(r);
               reset_reference(r^);
               r^.base:=procinfo^.framepointer;
               r^.offset:=hp^.pos;
               emit_const_ref(A_MOV,S_L,0,r);
             end;
           hp:=hp^.next;
         end;
   end;

  procedure finalizetempvariables;

    var
       hp : ptemprecord;
       hr : treference;
    begin
       hp:=templist;
       while assigned(hp) do
         begin
            if hp^.temptype in [tt_ansistring,tt_freeansistring] then
              begin
                procinfo^.flags:=procinfo^.flags or pi_needs_implicit_finally;
                reset_reference(hr);
                hr.base:=procinfo^.framepointer;
                hr.offset:=hp^.pos;
                emitpushreferenceaddr(hr);
                emitcall('FPC_ANSISTR_DECR_REF');
              end
            else if hp^.temptype=tt_interfacecom then
              begin
                procinfo^.flags:=procinfo^.flags or pi_needs_implicit_finally;
                reset_reference(hr);
                hr.base:=procinfo^.framepointer;
                hr.offset:=hp^.pos;
                emitpushreferenceaddr(hr);
                emitcall('FPC_INTF_DECR_REF');
              end;
            hp:=hp^.next;
         end;
   end;

  var
     ls : longint;

  procedure largest_size(p : pnamedindexobject);{$ifndef FPC}far;{$endif}

    begin
       if (psym(p)^.typ=varsym) and
         (pvarsym(p)^.getvaluesize>ls) then
         ls:=pvarsym(p)^.getvaluesize;
    end;

  procedure alignstack(alist : TAAsmoutput);

    begin
{$ifdef dummy}
       if (cs_optimize in aktglobalswitches) and
         (aktoptprocessor in [classp5,classp6]) then
         begin
            ls:=0;
            aktprocsym^.definition^.localst^.foreach({$ifndef TP}@{$endif}largest_size);
            if ls>=8 then
              aList.insert(Taicpu.Op_const_reg(A_AND,S_L,-8,R_ESP));
         end;
{$endif dummy}
    end;

  procedure genentrycode(alist : TAAsmoutput;make_global:boolean;
                         stackframe:longint;
                         var parasize:longint;var nostackframe:boolean;
                         inlined : boolean);
  {
    Generates the entry code for a procedure
  }
    var
      hs : string;
{$ifdef GDB}
      stab_function_name : tai_stab_function_name;
{$endif GDB}
      hr : preference;
      p : psymtable;
      r : treference;
      oldlist,
      oldexprasmlist : TAAsmoutput;
      again : pasmlabel;
      i : longint;
      tempbuf,tempaddr : treference;

    begin
       oldexprasmlist:=exprasmlist;
       exprasmlist:=alist;
       if (not inlined) and (aktprocsym^.definition^.proctypeoption=potype_proginit) then
           begin
              emitinsertcall('FPC_INITIALIZEUNITS');
              oldlist:=exprasmlist;
              exprasmlist:=TAAsmoutput.Create;
              p:=symtablestack;
              while assigned(p) do
                begin
                   p^.foreach({$ifndef TP}@{$endif}initialize_threadvar);
                   p:=p^.next;
                end;
              oldList.insertlist(exprasmlist);
              exprasmlist.free;
              exprasmlist:=oldlist;
           end;

{$ifdef GDB}
      if (not inlined) and (cs_debuginfo in aktmoduleswitches) then
        exprasmList.insert(Tai_force_line.Create);
{$endif GDB}

      { a constructor needs a help procedure }
      if (aktprocsym^.definition^.proctypeoption=potype_constructor) then
        begin
          if is_class(procinfo^._class) then
            begin
              procinfo^.flags:=procinfo^.flags or pi_needs_implicit_finally;
              exprasmList.insert(Taicpu.Op_cond_sym(A_Jcc,C_Z,S_NO,faillabel));
              emitinsertcall('FPC_NEW_CLASS');
            end
          else if is_object(procinfo^._class) then
            begin
              exprasmList.insert(Taicpu.Op_cond_sym(A_Jcc,C_Z,S_NO,faillabel));
              emitinsertcall('FPC_HELP_CONSTRUCTOR');
              getexplicitregister32(R_EDI);
              exprasmList.insert(Taicpu.Op_const_reg(A_MOV,S_L,procinfo^._class^.vmt_offset,R_EDI));
            end
          else
            Internalerror(200006161);
        end;

      { don't load ESI, does the caller }
      { we must do it for local function }
      { that can be called from a foreach }
      { of another object than self !! PM }

         if assigned(procinfo^._class) and  { !!!!! shouldn't we load ESI always? }
            (lexlevel>normal_function_level) then
           maybe_loadesi;

      { When message method contains self as a parameter,
        we must load it into ESI }
      If (po_containsself in aktprocsym^.definition^.procoptions) then
        begin
           new(hr);
           reset_reference(hr^);
           hr^.offset:=procinfo^.selfpointer_offset;
           hr^.base:=procinfo^.framepointer;
           exprasmList.insert(Taicpu.Op_ref_reg(A_MOV,S_L,hr,R_ESI));
           exprasmList.insert(Tairegalloc.Alloc(R_ESI));
        end;
      { should we save edi,esi,ebx like C ? }
      if (po_savestdregs in aktprocsym^.definition^.procoptions) then
       begin
         if (aktprocsym^.definition^.usedregisters and ($80 shr byte(R_EBX)))<>0 then
           exprasmList.insert(Taicpu.Op_reg(A_PUSH,S_L,R_EBX));
         exprasmList.insert(Taicpu.Op_reg(A_PUSH,S_L,R_ESI));
         exprasmList.insert(Taicpu.Op_reg(A_PUSH,S_L,R_EDI));
       end;

      { for the save all registers we can simply use a pusha,popa which
        push edi,esi,ebp,esp(ignored),ebx,edx,ecx,eax }
      if (po_saveregisters in aktprocsym^.definition^.procoptions) then
        begin
          exprasmList.insert(Taicpu.Op_none(A_PUSHA,S_L));
        end;

      { omit stack frame ? }
      if (not inlined) then
        if (procinfo^.framepointer=stack_pointer) then
          begin
              CGMessage(cg_d_stackframe_omited);
              nostackframe:=true;
              if (aktprocsym^.definition^.proctypeoption in [potype_unitinit,potype_proginit,potype_unitfinalize]) then
                parasize:=0
              else
                parasize:=aktprocsym^.definition^.parast^.datasize+procinfo^.para_offset-4;
              if stackframe<>0 then
                exprasmList.insert(Taicpu.op_const_reg(A_SUB,S_L,stackframe,R_ESP));
          end
        else
          begin
              alignstack(alist);
              if (aktprocsym^.definition^.proctypeoption in [potype_unitinit,potype_proginit,potype_unitfinalize]) then
                parasize:=0
              else
                parasize:=aktprocsym^.definition^.parast^.datasize+procinfo^.para_offset-8;
              nostackframe:=false;
              if stackframe<>0 then
                  begin
{$ifdef unused}
                      if (cs_littlesize in aktglobalswitches) and (stackframe<=65535) then
                          begin
                              if (cs_check_stack in aktlocalswitches) and
                                 not(target_info.target in [target_386_freebsd,
                                                target_i386_linux,target_i386_win32]) then
                                begin
                                  emitinsertcall('FPC_STACKCHECK');
                                  exprasmList.insert(Taicpu.Op_const(A_PUSH,S_L,stackframe));
                                end;
                              if cs_profile in aktmoduleswitches then
                                genprofilecode;

                            { %edi is already saved when pocdecl is used
                              if ((target_info.target=target_linux) or (target_info.target=target_freebsd)) and
                               ((aktprocsym^.definition^.options and poexports)<>0) then
                                  exprasmList.insert(Taicpu.Op_reg(A_PUSH,S_L,R_EDI)); }
                              { ATTENTION:
                                never use ENTER in linux !!! (or freebsd MvdV)
                                the stack page fault does not support it PM }
                              exprasmList.insert(Taicpu.Op_const_const(A_ENTER,S_NO,stackframe,0)))
                          end
                      else
{$endif unused}
                          begin
                            { windows guards only a few pages for stack growing, }
                            { so we have to access every page first              }
                            if (target_os.id=os_i386_win32) and
                              (stackframe>=winstackpagesize) then
                              begin
                                  if stackframe div winstackpagesize<=5 then
                                    begin
                                       exprasmList.insert(Taicpu.Op_const_reg(A_SUB,S_L,stackframe-4,R_ESP));
                                       for i:=1 to stackframe div winstackpagesize do
                                         begin
                                            hr:=new_reference(R_ESP,stackframe-i*winstackpagesize);
                                            exprasmList.concat(Taicpu.op_const_ref(A_MOV,S_L,0,hr));
                                         end;
                                       exprasmList.concat(Taicpu.op_reg(A_PUSH,S_L,R_EAX));
                                    end
                                  else
                                    begin
                                       getlabel(again);
                                       getexplicitregister32(R_EDI);
                                       exprasmList.concat(Taicpu.op_const_reg(A_MOV,S_L,stackframe div winstackpagesize,R_EDI));
                                       emitlab(again);
                                       exprasmList.concat(Taicpu.op_const_reg(A_SUB,S_L,winstackpagesize-4,R_ESP));
                                       exprasmList.concat(Taicpu.op_reg(A_PUSH,S_L,R_EAX));
                                       exprasmList.concat(Taicpu.op_reg(A_DEC,S_L,R_EDI));
                                       emitjmp(C_NZ,again);
                                       ungetregister32(R_EDI);
                                       exprasmList.concat(Taicpu.op_const_reg(A_SUB,S_L,stackframe mod winstackpagesize,R_ESP));
                                    end
                              end
                            else
                              exprasmList.insert(Taicpu.Op_const_reg(A_SUB,S_L,stackframe,R_ESP));
                            if (cs_check_stack in aktlocalswitches) and
                              not(target_info.target in [target_i386_freebsd,
                                         target_i386_linux,target_i386_win32]) then
                              begin
                                 emitinsertcall('FPC_STACKCHECK');
                                 exprasmList.insert(Taicpu.Op_const(A_PUSH,S_L,stackframe));
                              end;
                            if cs_profile in aktmoduleswitches then
                              genprofilecode;
                            exprasmList.insert(Taicpu.Op_reg_reg(A_MOV,S_L,R_ESP,R_EBP));
                            exprasmList.insert(Taicpu.Op_reg(A_PUSH,S_L,R_EBP));
                          end;
                  end { endif stackframe <> 0 }
              else
                 begin
                   if cs_profile in aktmoduleswitches then
                     genprofilecode;
                   exprasmList.insert(Taicpu.Op_reg_reg(A_MOV,S_L,R_ESP,R_EBP));
                   exprasmList.insert(Taicpu.Op_reg(A_PUSH,S_L,R_EBP));
                 end;
          end;

      if (po_interrupt in aktprocsym^.definition^.procoptions) then
          generate_interrupt_stackframe_entry;

      { initialize return value }
      if (procinfo^.returntype.def<>pdef(voiddef)) and
         (procinfo^.returntype.def^.needs_inittable) then
        begin
           procinfo^.flags:=procinfo^.flags or pi_needs_implicit_finally;
           reset_reference(r);
           r.offset:=procinfo^.return_offset;
           r.base:=procinfo^.framepointer;
           initialize(procinfo^.returntype.def,r,ret_in_param(procinfo^.returntype.def));
        end;

      { initialisize local data like ansistrings }
      case aktprocsym^.definition^.proctypeoption of
         potype_unitinit:
           begin
              { using current_module.globalsymtable is hopefully      }
              { more robust than symtablestack and symtablestack^.next }
              psymtable(current_module.globalsymtable)^.foreach({$ifndef TP}@{$endif}initialize_data);
              psymtable(current_module.localsymtable)^.foreach({$ifndef TP}@{$endif}initialize_data);
           end;
         { units have seperate code for initilization and finalization }
         potype_unitfinalize: ;
         else
           aktprocsym^.definition^.localst^.foreach({$ifndef TP}@{$endif}initialize_data);
      end;

      { initialisizes temp. ansi/wide string data }
      inittempvariables;

      { generate copies of call by value parameters }
      if not(po_assembler in aktprocsym^.definition^.procoptions) and
         (([pocall_cdecl,pocall_cppdecl]*aktprocsym^.definition^.proccalloptions)=[]) then
        aktprocsym^.definition^.parast^.foreach({$ifndef TP}@{$endif}copyvalueparas);

      if assigned( aktprocsym^.definition^.parast) then
        aktprocsym^.definition^.parast^.foreach({$ifndef TP}@{$endif}init_paras);

      { do we need an exception frame because of ansi/widestrings/interfaces ? }
      if not inlined and
         ((procinfo^.flags and pi_needs_implicit_finally)<>0) and
      { but it's useless in init/final code of units }
        not(aktprocsym^.definition^.proctypeoption in [potype_unitfinalize,potype_unitinit]) then
        begin
            usedinproc:=usedinproc or ($80 shr byte(R_EAX));

            exprasmList.concat(Taicpu.op_const_reg(A_SUB,S_L,36,R_ESP));
            exprasmList.concat(Taicpu.op_reg_reg(A_MOV,S_L,R_ESP,R_EDI));

            reset_reference(tempaddr);
            tempaddr.base:=R_EDI;
            emitpushreferenceaddr(tempaddr);

            reset_reference(tempbuf);
            tempbuf.base:=R_EDI;
            tempbuf.offset:=12;
            emitpushreferenceaddr(tempbuf);

            { Type of stack-frame must be pushed}
            exprasmList.concat(Taicpu.op_const(A_PUSH,S_L,1));
            emitcall('FPC_PUSHEXCEPTADDR');

            exprasmList.concat(Taicpu.op_reg(A_PUSH,S_L,R_EAX));
            emitcall('FPC_SETJMP');
            exprasmList.concat(Taicpu.op_reg(A_PUSH,S_L,R_EAX));
            exprasmList.concat(Taicpu.op_reg_reg(A_TEST,S_L,R_EAX,R_EAX));
            emitjmp(C_NE,aktexitlabel);
            { probably we've to reload self here }
            maybe_loadesi;
        end;

      if not inlined then
       begin
         if (cs_profile in aktmoduleswitches) or
            (aktprocsym^.definition^.owner^.symtabletype=globalsymtable) or
            (assigned(procinfo^._class) and (procinfo^._class^.owner^.symtabletype=globalsymtable)) then
              make_global:=true;

         hs:=aktprocsym^.definition^.aliasnames.getfirst;

{$ifdef GDB}
         if (cs_debuginfo in aktmoduleswitches) and target_os.use_function_relative_addresses then
           stab_function_name := Tai_stab_function_name.Create(strpnew(hs));
{$EndIf GDB}

         while hs<>'' do
          begin
            if make_global then
              exprasmList.insert(Tai_symbol.Createname_global(hs,0))
            else
              exprasmList.insert(Tai_symbol.Createname(hs,0));

{$ifdef GDB}
            if (cs_debuginfo in aktmoduleswitches) and
               target_os.use_function_relative_addresses then
              exprasmList.insert(Tai_stab_function_name.Create(strpnew(hs)));
{$endif GDB}

            hs:=aktprocsym^.definition^.aliasnames.getfirst;
          end;

         if make_global or ((procinfo^.flags and pi_is_global) <> 0) then
          aktprocsym^.is_global := True;

{$ifdef GDB}
         if (cs_debuginfo in aktmoduleswitches) then
          begin
            if target_os.use_function_relative_addresses then
             exprasmList.insert(stab_function_name);
            exprasmList.insert(Tai_stabs.Create(aktprocsym^.stabstring));
            aktprocsym^.isstabwritten:=true;
          end;
{$endif GDB}

       { Align, gprof uses 16 byte granularity }
         if (cs_profile in aktmoduleswitches) then
          exprasmList.insert(Tai_align.Create_op(16,$90))
         else
          if not(cs_littlesize in aktglobalswitches) then
           exprasmList.insert(Tai_align.Create(16));
       end;
       if inlined then
         load_regvars(exprasmlist,nil);
      exprasmlist:=oldexprasmlist;
  end;


  procedure handle_return_value(inlined : boolean;var uses_eax,uses_edx : boolean);
    var
       hr : preference;
       op : Tasmop;
       s : Topsize;
  begin
      uses_eax:=false;
      uses_edx:=false;
      if procinfo^.returntype.def<>pdef(voiddef) then
          begin
              {if ((procinfo^.flags and pi_operator)<>0) and
                 assigned(opsym) then
                procinfo^.funcret_is_valid:=
                  procinfo^.funcret_is_valid or (opsym^.refs>0);}
              if (procinfo^.funcret_state<>vs_assigned) and not inlined { and
                ((procinfo^.flags and pi_uses_asm)=0)} then
               CGMessage(sym_w_function_result_not_set);
              hr:=new_reference(procinfo^.framepointer,procinfo^.return_offset);
              if (procinfo^.returntype.def^.deftype in [orddef,enumdef]) then
                begin
                  uses_eax:=true;
                  exprasmList.concat(Tairegalloc.Alloc(R_EAX));
                  case procinfo^.returntype.def^.size of
                   8:
                     begin
                        emit_ref_reg(A_MOV,S_L,hr,R_EAX);
                        hr:=new_reference(procinfo^.framepointer,procinfo^.return_offset+4);
                        exprasmList.concat(Tairegalloc.Alloc(R_EDX));
                        emit_ref_reg(A_MOV,S_L,hr,R_EDX);
                        uses_edx:=true;
                     end;

                   4:
                     emit_ref_reg(A_MOV,S_L,hr,R_EAX);

                   2:
                     emit_ref_reg(A_MOV,S_W,hr,R_AX);

                   1:
                     emit_ref_reg(A_MOV,S_B,hr,R_AL);
                  end;
                end
              else
                if ret_in_acc(procinfo^.returntype.def) then
                  begin
                    uses_eax:=true;
                    exprasmList.concat(Tairegalloc.Alloc(R_EAX));
                    emit_ref_reg(A_MOV,S_L,hr,R_EAX);
                  end
              else
                 if (procinfo^.returntype.def^.deftype=floatdef) then
                   begin
                      floatloadops(pfloatdef(procinfo^.returntype.def)^.typ,op,s);
                      exprasmList.concat(Taicpu.Op_ref(op,s,hr));
                   end
              else
                dispose(hr);
          end
  end;


  procedure genexitcode(alist : TAAsmoutput;parasize:longint;nostackframe,inlined:boolean);

    var
{$ifdef GDB}
       mangled_length : longint;
       p : pchar;
       st : string[2];
{$endif GDB}
       nofinal,okexitlabel,noreraiselabel,nodestroycall : pasmlabel;
       hr : treference;
       uses_eax,uses_edx,uses_esi : boolean;
       oldexprasmlist : TAAsmoutput;
       ai : taicpu;
       pd : pprocdef;

  begin
      oldexprasmlist:=exprasmlist;
      exprasmlist:=alist;

      if aktexitlabel^.is_used then
        exprasmList.insert(Tai_label.Create(aktexitlabel));

      { call the destructor help procedure }
      if (aktprocsym^.definition^.proctypeoption=potype_destructor) and
         assigned(procinfo^._class) then
        begin
          if is_class(procinfo^._class) then
            begin
              emitinsertcall('FPC_DISPOSE_CLASS');
            end
          else if is_object(procinfo^._class) then
            begin
              emitinsertcall('FPC_HELP_DESTRUCTOR');
              getexplicitregister32(R_EDI);
              exprasmList.insert(Taicpu.Op_const_reg(A_MOV,S_L,procinfo^._class^.vmt_offset,R_EDI));
              { must the object be finalized ? }
              if procinfo^._class^.needs_inittable then
                begin
                   getlabel(nofinal);
                   exprasmList.insert(Tai_label.Create(nofinal));
                   emitinsertcall('FPC_FINALIZE');
                   ungetregister32(R_EDI);
                   exprasmList.insert(Taicpu.Op_reg(A_PUSH,S_L,R_ESI));
                   exprasmList.insert(Taicpu.Op_sym(A_PUSH,S_L,procinfo^._class^.get_inittable_label));
                   ai:=Taicpu.Op_sym(A_Jcc,S_NO,nofinal);
                   ai.SetCondition(C_Z);
                   exprasmList.insert(ai);
                   reset_reference(hr);
                   hr.base:=R_EBP;
                   hr.offset:=8;
                   exprasmList.insert(Taicpu.Op_const_ref(A_CMP,S_L,0,newreference(hr)));
                end;
            end
          else
            begin
              Internalerror(200006161);
            end;
        end;

      { finalize temporary data }
      finalizetempvariables;

      { finalize local data like ansistrings}
      case aktprocsym^.definition^.proctypeoption of
         potype_unitfinalize:
           begin
              { using current_module.globalsymtable is hopefully      }
              { more robust than symtablestack and symtablestack^.next }
              psymtable(current_module.globalsymtable)^.foreach({$ifndef TP}@{$endif}finalize_data);
              psymtable(current_module.localsymtable)^.foreach({$ifndef TP}@{$endif}finalize_data);
           end;
         { units have seperate code for initialization and finalization }
         potype_unitinit: ;
         else
           aktprocsym^.definition^.localst^.foreach({$ifndef TP}@{$endif}finalize_data);
      end;

      { finalize paras data }
      if assigned(aktprocsym^.definition^.parast) then
        aktprocsym^.definition^.parast^.foreach({$ifndef TP}@{$endif}final_paras);

      { do we need to handle exceptions because of ansi/widestrings ? }
      if not inlined and
         ((procinfo^.flags and pi_needs_implicit_finally)<>0) and
      { but it's useless in init/final code of units }
        not(aktprocsym^.definition^.proctypeoption in [potype_unitfinalize,potype_unitinit]) then
        begin
           { the exception helper routines modify all registers }
           aktprocsym^.definition^.usedregisters:=$ff;

           getlabel(noreraiselabel);
           emitcall('FPC_POPADDRSTACK');
           exprasmList.concat(Tairegalloc.Alloc(R_EAX));
           exprasmList.concat(Taicpu.op_reg(A_POP,S_L,R_EAX));
           exprasmList.concat(Taicpu.op_reg_reg(A_TEST,S_L,R_EAX,R_EAX));
           ungetregister32(R_EAX);
           emitjmp(C_E,noreraiselabel);
           if (aktprocsym^.definition^.proctypeoption=potype_constructor) then
             begin
                if assigned(procinfo^._class) then
                  begin
                     pd:=procinfo^._class^.searchdestructor;
                     if assigned(pd) then
                       begin
                          getlabel(nodestroycall);
                          emit_const_ref(A_CMP,S_L,0,new_reference(procinfo^.framepointer,
                            procinfo^.selfpointer_offset));
                          emitjmp(C_E,nodestroycall);
                          if is_class(procinfo^._class) then
                            begin
                               emit_const(A_PUSH,S_L,1);
                               emit_reg(A_PUSH,S_L,R_ESI);
                            end
                          else if is_object(procinfo^._class) then
                            begin
                               emit_reg(A_PUSH,S_L,R_ESI);
                               emit_sym(A_PUSH,S_L,newasmsymbol(procinfo^._class^.vmt_mangledname));
                            end
                          else
                            begin
                              Internalerror(200006161);
                            end;
                          if (po_virtualmethod in pd^.procoptions) then
                            begin
                               emit_ref_reg(A_MOV,S_L,new_reference(R_ESI,0),R_EDI);
                               emit_ref(A_CALL,S_NO,new_reference(R_EDI,procinfo^._class^.vmtmethodoffset(pd^.extnumber)));
                            end
                          else
                            emitcall(pd^.mangledname);
                          { not necessary because the result is never assigned in the
                            case of an exception (FK)
                          emit_const_reg(A_MOV,S_L,0,R_ESI);
                          emit_const_ref(A_MOV,S_L,0,new_reference(procinfo^.framepointer,8));
                          }
                          emitlab(nodestroycall);
                       end;
                  end
             end
           else
           { must be the return value finalized before reraising the exception? }
           if (procinfo^.returntype.def<>pdef(voiddef)) and
             (procinfo^.returntype.def^.needs_inittable) and
             ((procinfo^.returntype.def^.deftype<>objectdef) or
              not is_class(procinfo^.returntype.def)) then
             begin
                reset_reference(hr);
                hr.offset:=procinfo^.return_offset;
                hr.base:=procinfo^.framepointer;
                finalize(procinfo^.returntype.def,hr,ret_in_param(procinfo^.returntype.def));
             end;

           emitcall('FPC_RERAISE');
           emitlab(noreraiselabel);
        end;

      { call __EXIT for main program }
      if (not DLLsource) and (not inlined) and (aktprocsym^.definition^.proctypeoption=potype_proginit) then
       begin
         emitcall('FPC_DO_EXIT');
       end;

      { handle return value }
      uses_eax:=false;
      uses_edx:=false;
      uses_esi:=false;
      if not(po_assembler in aktprocsym^.definition^.procoptions) then
          if (aktprocsym^.definition^.proctypeoption<>potype_constructor) then
            handle_return_value(inlined,uses_eax,uses_edx)
          else
              begin
                  { successful constructor deletes the zero flag }
                  { and returns self in eax                   }
                  { eax must be set to zero if the allocation failed !!! }
                  getlabel(okexitlabel);
                  emitjmp(C_NONE,okexitlabel);
                  emitlab(faillabel);
                  if is_class(procinfo^._class) then
                    begin
                      emit_ref_reg(A_MOV,S_L,new_reference(procinfo^.framepointer,8),R_ESI);
                      emitcall('FPC_HELP_FAIL_CLASS');
                    end
                  else if is_object(procinfo^._class) then
                    begin
                      emit_ref_reg(A_MOV,S_L,new_reference(procinfo^.framepointer,12),R_ESI);
                       getexplicitregister32(R_EDI);
                      emit_const_reg(A_MOV,S_L,procinfo^._class^.vmt_offset,R_EDI);
                      emitcall('FPC_HELP_FAIL');
                      ungetregister32(R_EDI);
                    end
                  else
                    Internalerror(200006161);

                  emitlab(okexitlabel);

                  { for classes this is done after the call to }
                  { AfterConstruction                          }
                  if is_object(procinfo^._class) then
                    begin
                       exprasmList.concat(Tairegalloc.Alloc(R_EAX));
                       emit_reg_reg(A_MOV,S_L,R_ESI,R_EAX);
                       uses_eax:=true;
                    end;
                  emit_reg_reg(A_TEST,S_L,R_ESI,R_ESI);
                  uses_esi:=true;
              end;

      { stabs uses the label also ! }
      if aktexit2label^.is_used or
         ((cs_debuginfo in aktmoduleswitches) and not inlined) then
        emitlab(aktexit2label);
      { gives problems for long mangled names }
      {List.concat(Tai_symbol.Create(aktprocsym^.definition^.mangledname+'_end'));}

      { should we restore edi ? }
      { for all i386 gcc implementations }
      if (po_savestdregs in aktprocsym^.definition^.procoptions) then
        begin
          if (aktprocsym^.definition^.usedregisters and ($80 shr byte(R_EBX)))<>0 then
           exprasmList.concat(Taicpu.Op_reg(A_POP,S_L,R_EBX));
          exprasmList.concat(Taicpu.Op_reg(A_POP,S_L,R_ESI));
          exprasmList.concat(Taicpu.Op_reg(A_POP,S_L,R_EDI));
          { here we could reset R_EBX
            but that is risky because it only works
            if genexitcode is called after genentrycode
            so lets skip this for the moment PM
          aktprocsym^.definition^.usedregisters:=
            aktprocsym^.definition^.usedregisters or not ($80 shr byte(R_EBX));
          }
        end;

      { for the save all registers we can simply use a pusha,popa which
        push edi,esi,ebp,esp(ignored),ebx,edx,ecx,eax }
      if (po_saveregisters in aktprocsym^.definition^.procoptions) then
        begin
          if uses_esi then
            exprasmList.concat(Taicpu.Op_reg_ref(A_MOV,S_L,R_ESI,new_reference(R_ESP,4)));
          if uses_edx then
            exprasmList.concat(Taicpu.Op_reg_ref(A_MOV,S_L,R_EDX,new_reference(R_ESP,20)));
          if uses_eax then
            exprasmList.concat(Taicpu.Op_reg_ref(A_MOV,S_L,R_EAX,new_reference(R_ESP,28)));
          exprasmList.concat(Taicpu.Op_none(A_POPA,S_L));
        end;
      if not(nostackframe) then
        begin
          if not inlined then
            exprasmList.concat(Taicpu.Op_none(A_LEAVE,S_NO));
        end
      else
        begin
          if (gettempsize<>0) and not inlined then
            exprasmList.insert(Taicpu.op_const_reg(A_ADD,S_L,gettempsize,R_ESP));
        end;

      { parameters are limited to 65535 bytes because }
      { ret allows only imm16                    }
      if (parasize>65535) and not(pocall_clearstack in aktprocsym^.definition^.proccalloptions) then
       CGMessage(cg_e_parasize_too_big);

      { at last, the return is generated }

      if not inlined then
      if (po_interrupt in aktprocsym^.definition^.procoptions) then
          begin
             if uses_esi then
               exprasmList.concat(Taicpu.Op_reg_ref(A_MOV,S_L,R_ESI,new_reference(R_ESP,16)));
             if uses_edx then
               begin
                 exprasmList.concat(Tairegalloc.Alloc(R_EAX));
                 exprasmList.concat(Taicpu.Op_reg_ref(A_MOV,S_L,R_EDX,new_reference(R_ESP,12)));
               end;
             if uses_eax then
               begin
                 exprasmList.concat(Tairegalloc.Alloc(R_EAX));
                 exprasmList.concat(Taicpu.Op_reg_ref(A_MOV,S_L,R_EAX,new_reference(R_ESP,0)));
               end;
             generate_interrupt_stackframe_exit;
          end
      else
       begin
       {Routines with the poclearstack flag set use only a ret.}
       { also routines with parasize=0     }
         if (pocall_clearstack in aktprocsym^.definition^.proccalloptions) then
           begin
{$ifndef OLD_C_STACK}
             { complex return values are removed from stack in C code PM }
             if ret_in_param(aktprocsym^.definition^.rettype.def) then
               exprasmList.concat(Taicpu.Op_const(A_RET,S_NO,4))
             else
{$endif not OLD_C_STACK}
               exprasmList.concat(Taicpu.Op_none(A_RET,S_NO));
           end
         else if (parasize=0) then
          exprasmList.concat(Taicpu.Op_none(A_RET,S_NO))
         else
          exprasmList.concat(Taicpu.Op_const(A_RET,S_NO,parasize));
       end;

      if not inlined then
        exprasmList.concat(Tai_symbol_end.Createname(aktprocsym^.definition^.mangledname));

{$ifdef GDB}
      if (cs_debuginfo in aktmoduleswitches) and not inlined  then
          begin
              aktprocsym^.concatstabto(exprasmlist);
              if assigned(procinfo^._class) then
                if (not assigned(procinfo^.parent) or
                   not assigned(procinfo^.parent^._class)) then
                  begin
                    if (po_classmethod in aktprocsym^.definition^.procoptions) or
                       ((po_virtualmethod in aktprocsym^.definition^.procoptions) and
                        (potype_constructor=aktprocsym^.definition^.proctypeoption)) or
                       (po_staticmethod in aktprocsym^.definition^.procoptions) then
                      begin
                        exprasmList.concat(Tai_stabs.Create(strpnew(
                         '"pvmt:p'+pvmtdef^.numberstring+'",'+
                         tostr(N_PSYM)+',0,0,'+tostr(procinfo^.selfpointer_offset))));
                      end
                    else
                      begin
                        if not(is_class(procinfo^._class)) then
                          st:='v'
                        else
                          st:='p';
                        exprasmList.concat(Tai_stabs.Create(strpnew(
                         '"$t:'+st+procinfo^._class^.numberstring+'",'+
                         tostr(N_PSYM)+',0,0,'+tostr(procinfo^.selfpointer_offset))));
                      end;
                  end
                else
                  begin
                    if not is_class(procinfo^._class) then
                      st:='*'
                    else
                      st:='';
                    exprasmList.concat(Tai_stabs.Create(strpnew(
                     '"$t:r'+st+procinfo^._class^.numberstring+'",'+
                     tostr(N_RSYM)+',0,0,'+tostr(GDB_i386index[R_ESI]))));
                  end;

              { define calling EBP as pseudo local var PM }
              { this enables test if the function is a local one !! }
              if  assigned(procinfo^.parent) and (lexlevel>normal_function_level) then
                exprasmList.concat(Tai_stabs.Create(strpnew(
                 '"parent_ebp:'+voidpointerdef^.numberstring+'",'+
                 tostr(N_LSYM)+',0,0,'+tostr(procinfo^.framepointer_offset))));

              if (pdef(aktprocsym^.definition^.rettype.def) <> pdef(voiddef)) then
                begin
                  if ret_in_param(aktprocsym^.definition^.rettype.def) then
                    exprasmList.concat(Tai_stabs.Create(strpnew(
                     '"'+aktprocsym^.name+':X*'+pstoreddef(aktprocsym^.definition^.rettype.def)^.numberstring+'",'+
                     tostr(N_PSYM)+',0,0,'+tostr(procinfo^.return_offset))))
                  else
                    exprasmList.concat(Tai_stabs.Create(strpnew(
                     '"'+aktprocsym^.name+':X'+pstoreddef(aktprocsym^.definition^.rettype.def)^.numberstring+'",'+
                     tostr(N_PSYM)+',0,0,'+tostr(procinfo^.return_offset))));
                  if (m_result in aktmodeswitches) then
                    if ret_in_param(aktprocsym^.definition^.rettype.def) then
                      exprasmList.concat(Tai_stabs.Create(strpnew(
                       '"RESULT:X*'+pstoreddef(aktprocsym^.definition^.rettype.def)^.numberstring+'",'+
                       tostr(N_PSYM)+',0,0,'+tostr(procinfo^.return_offset))))
                    else
                      exprasmList.concat(Tai_stabs.Create(strpnew(
                       '"RESULT:X'+pstoreddef(aktprocsym^.definition^.rettype.def)^.numberstring+'",'+
                       tostr(N_PSYM)+',0,0,'+tostr(procinfo^.return_offset))));
                end;
              mangled_length:=length(aktprocsym^.definition^.mangledname);
              getmem(p,2*mangled_length+50);
              strpcopy(p,'192,0,0,');
              strpcopy(strend(p),aktprocsym^.definition^.mangledname);
              if (target_os.use_function_relative_addresses) then
                begin
                  strpcopy(strend(p),'-');
                  strpcopy(strend(p),aktprocsym^.definition^.mangledname);
                end;
              exprasmList.concat(Tai_stabn.Create(strnew(p)));
              {List.concat(Tai_stabn.Create(strpnew('192,0,0,'
               +aktprocsym^.definition^.mangledname))));
              p[0]:='2';p[1]:='2';p[2]:='4';
              strpcopy(strend(p),'_end');}
              strpcopy(p,'224,0,0,'+aktexit2label^.name);
              if (target_os.use_function_relative_addresses) then
                begin
                  strpcopy(strend(p),'-');
                  strpcopy(strend(p),aktprocsym^.definition^.mangledname);
                end;
              exprasmList.concatlist(withdebuglist);
              exprasmList.concat(Tai_stabn.Create(strnew(p)));
               { strpnew('224,0,0,'
               +aktprocsym^.definition^.mangledname+'_end'))));}
              freemem(p,2*mangled_length+50);
          end;
{$endif GDB}
       if inlined then
         cleanup_regvars(exprasmlist);
      exprasmlist:=oldexprasmlist;
  end;

    procedure genimplicitunitfinal(alist : TAAsmoutput);

      begin
         { using current_module.globalsymtable is hopefully      }
         { more robust than symtablestack and symtablestack^.next }
         psymtable(current_module.globalsymtable)^.foreach({$ifndef TP}@{$endif}finalize_data);
         psymtable(current_module.localsymtable)^.foreach({$ifndef TP}@{$endif}finalize_data);
         exprasmList.insert(Tai_symbol.Createname_global('FINALIZE$$'+current_module.modulename^,0));
         exprasmList.insert(Tai_symbol.Createname_global(target_os.cprefix+current_module.modulename^+'_finalize',0));
{$ifdef GDB}
         if (cs_debuginfo in aktmoduleswitches) and
           target_os.use_function_relative_addresses then
           exprasmList.insert(Tai_stab_function_name.Create(strpnew('FINALIZE$$'+current_module.modulename^)));
{$endif GDB}
         exprasmList.concat(Taicpu.Op_none(A_RET,S_NO));
         aList.concatlist(exprasmlist);
      end;

    procedure genimplicitunitinit(alist : TAAsmoutput);

      begin
         { using current_module.globalsymtable is hopefully      }
         { more robust than symtablestack and symtablestack^.next }
         psymtable(current_module.globalsymtable)^.foreach({$ifndef TP}@{$endif}finalize_data);
         psymtable(current_module.localsymtable)^.foreach({$ifndef TP}@{$endif}finalize_data);
         exprasmList.insert(Tai_symbol.Createname_global('INIT$$'+current_module.modulename^,0));
         exprasmList.insert(Tai_symbol.Createname_global(target_os.cprefix+current_module.modulename^+'_init',0));
{$ifdef GDB}
         if (cs_debuginfo in aktmoduleswitches) and
           target_os.use_function_relative_addresses then
           exprasmList.insert(Tai_stab_function_name.Create(strpnew('INIT$$'+current_module.modulename^)));
{$endif GDB}
         exprasmList.concat(Taicpu.Op_none(A_RET,S_NO));
         aList.concatlist(exprasmlist);
      end;

{$ifdef test_dest_loc}
       procedure mov_reg_to_dest(p : ptree; s : topsize; reg : tregister);

         begin
            if (dest_loc.loc=LOC_CREGISTER) or (dest_loc.loc=LOC_REGISTER) then
              begin
                emit_reg_reg(A_MOV,s,reg,dest_loc.register);
                set_location(p^.location,dest_loc);
                in_dest_loc:=true;
              end
            else
            if (dest_loc.loc=LOC_REFERENCE) or (dest_loc.loc=LOC_MEM) then
              begin
                exprasmList.concat(Taicpu.Op_reg_ref(A_MOV,s,reg,newreference(dest_loc.reference)));
                set_location(p^.location,dest_loc);
                in_dest_loc:=true;
              end
            else
              internalerror(20080);
         end;

{$endif test_dest_loc}

end.
{
  $Log$
  Revision 1.17  2001-01-05 17:36:58  florian
  * the info about exception frames is stored now on the stack
  instead on the heap

  Revision 1.16  2000/12/25 00:07:31  peter
    + new tlinkedlist class (merge of old tstringqueue,tcontainer and
      tlinkedlist objects)

  Revision 1.15  2000/12/05 11:44:32  jonas
    + new integer regvar handling, should be much more efficient

  Revision 1.14  2000/11/29 00:30:43  florian
    * unused units removed from uses clause
    * some changes for widestrings

  Revision 1.13  2000/11/28 00:28:07  pierre
   * stabs fixing

  Revision 1.12  2000/11/22 15:12:06  jonas
    * fixed inline-related problems (partially "merges")

  Revision 1.11  2000/11/17 10:30:24  florian
    * passing interfaces as parameters fixed

  Revision 1.10  2000/11/07 23:40:48  florian
    + AfterConstruction and BeforeDestruction impemented

  Revision 1.9  2000/11/06 23:49:20  florian
    * fixed init_paras call

  Revision 1.8  2000/11/06 23:15:01  peter
    * added copyvaluepara call again

  Revision 1.7  2000/11/04 14:25:23  florian
    + merged Attila's changes for interfaces, not tested yet

  Revision 1.6  2000/10/31 22:02:55  peter
    * symtable splitted, no real code changes

  Revision 1.5  2000/10/24 22:23:04  peter
    * emitcall -> emitinsertcall for profiling (merged)

  Revision 1.4  2000/10/24 12:47:45  jonas
    * allocate registers which hold function result

  Revision 1.3  2000/10/24 08:54:25  michael
  + Extra patch from peter

  Revision 1.2  2000/10/24 07:20:03  pierre
   * fix for bug 1193 (merged)

  Revision 1.1  2000/10/15 09:47:42  peter
    * moved to i386/

  Revision 1.19  2000/10/14 10:14:46  peter
    * moehrendorf oct 2000 rewrite

  Revision 1.18  2000/10/10 14:55:28  jonas
    * added missing regallocs for edi in emit_mov_ref_reg64 (merged)

  Revision 1.17  2000/10/01 19:48:23  peter
    * lot of compile updates for cg11

  Revision 1.16  2000/09/30 16:08:45  peter
    * more cg11 updates

  Revision 1.15  2000/09/24 15:06:12  peter
    * use defines.inc

  Revision 1.14  2000/09/16 12:22:52  peter
    * freebsd support merged

  Revision 1.13  2000/08/27 16:11:49  peter
    * moved some util functions from globals,cobjects to cutils
    * splitted files into finput,fmodule

  Revision 1.12  2000/08/24 19:07:54  peter
    * don't initialize if localvarsym is set because that varsym will
      already be initialized
    * first initialize local data before copy of value para's (merged)

  Revision 1.11  2000/08/19 20:09:33  peter
    * check size after checking openarray in push_value_para (merged)

  Revision 1.10  2000/08/16 13:06:06  florian
    + support of 64 bit integer constants

  Revision 1.9  2000/08/10 18:42:03  peter
    * fixed for constants in emit_push_mem_size for go32v2 (merged)

  Revision 1.8  2000/08/07 11:29:40  jonas
    + emit_push_mem_size() which pushes a value in memory of a certain size
    * pushsetelement() and pushvaluepara() use this new procedure, because
      otherwise they could sometimes try to push data past the end of the
      heap, causing a crash
     (merged from fixes branch)

  Revision 1.7  2000/08/03 13:17:25  jonas
    + allow regvars to be used inside inlined procs, which required  the
      following changes:
        + load regvars in genentrycode/free them in genexitcode (cgai386)
        * moved all regvar related code to new regvars unit
        + added pregvarinfo type to hcodegen
        + added regvarinfo field to tprocinfo (symdef/symdefh)
        * deallocate the regvars of the caller in secondprocinline before
          inlining the called procedure and reallocate them afterwards

  Revision 1.6  2000/08/02 08:05:04  jonas
    * fixed web bug1087
    * allocate R_ECX explicitely if it's used
    (merged from fixes branch)

  Revision 1.5  2000/07/27 09:25:05  jonas
    * moved locflags2reg() procedure from cg386add to cgai386
    + added locjump2reg() procedure to cgai386
    * fixed internalerror(2002) when the result of a case expression has
      LOC_JUMP
    (all merged from fixes branch)

  Revision 1.4  2000/07/21 15:14:02  jonas
    + added is_addr field for labels, if they are only used for getting the address
       (e.g. for io checks) and corresponding getaddrlabel() procedure

  Revision 1.3  2000/07/13 12:08:25  michael
  + patched to 1.1.0 with former 1.09patch from peter

  Revision 1.2  2000/07/13 11:32:37  michael
  + removed logs

}