mirror of
				https://gitlab.com/freepascal.org/fpc/source.git
				synced 2025-11-04 07:59:34 +01:00 
			
		
		
		
	inline assembly, and fixed check after r35959 (mantis #32318) o can also subscript parameters passed by value on the stack o can also subscript local variables, the parameters passed by reference that are subsequently copied into a local git-svn-id: trunk@37886 -
		
			
				
	
	
		
			819 lines
		
	
	
		
			28 KiB
		
	
	
	
		
			ObjectPascal
		
	
	
	
	
	
			
		
		
	
	
			819 lines
		
	
	
		
			28 KiB
		
	
	
	
		
			ObjectPascal
		
	
	
	
	
	
{
 | 
						|
    Copyright (c) 1998-2002 by Carl Eric Codere and Peter Vreman
 | 
						|
 | 
						|
    Does the parsing for the PowerPC GNU AS styled inline assembler.
 | 
						|
 | 
						|
    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 rappcgas;
 | 
						|
 | 
						|
{$i fpcdefs.inc}
 | 
						|
 | 
						|
  Interface
 | 
						|
 | 
						|
    uses
 | 
						|
      raatt,rappc;
 | 
						|
 | 
						|
    type
 | 
						|
      tppcattreader = class(tattreader)
 | 
						|
        function is_asmopcode(const s: string):boolean;override;
 | 
						|
        procedure handleopcode;override;
 | 
						|
        procedure BuildReference(oper : tppcoperand);
 | 
						|
        procedure BuildOperand(oper : tppcoperand);
 | 
						|
        procedure BuildOpCode(instr : tppcinstruction);
 | 
						|
        procedure ReadAt(oper : tppcoperand);
 | 
						|
        procedure ReadSym(oper : tppcoperand);
 | 
						|
        procedure ConvertCalljmp(instr : tppcinstruction);
 | 
						|
      end;
 | 
						|
 | 
						|
 | 
						|
  Implementation
 | 
						|
 | 
						|
    uses
 | 
						|
      { helpers }
 | 
						|
      cutils,
 | 
						|
      { global }
 | 
						|
      globtype,globals,verbose,
 | 
						|
      systems,
 | 
						|
      { aasm }
 | 
						|
      cpubase,aasmbase,aasmtai,aasmdata,aasmcpu,
 | 
						|
      { symtable }
 | 
						|
      symconst,symsym,symdef,
 | 
						|
      { parser }
 | 
						|
      procinfo,
 | 
						|
      rabase,rautils,
 | 
						|
      cgbase,cgobj,cgppc,paramgr
 | 
						|
      ;
 | 
						|
 | 
						|
    procedure tppcattreader.ReadSym(oper : tppcoperand);
 | 
						|
      var
 | 
						|
         tempstr, mangledname : string;
 | 
						|
         typesize,l,k : tcgint;
 | 
						|
      begin
 | 
						|
        tempstr:=actasmpattern;
 | 
						|
        Consume(AS_ID);
 | 
						|
        { typecasting? }
 | 
						|
        if (actasmtoken=AS_LPAREN) and
 | 
						|
           SearchType(tempstr,typesize) then
 | 
						|
         begin
 | 
						|
           oper.hastype:=true;
 | 
						|
           Consume(AS_LPAREN);
 | 
						|
           BuildOperand(oper);
 | 
						|
           Consume(AS_RPAREN);
 | 
						|
           if oper.opr.typ in [OPR_REFERENCE,OPR_LOCAL] then
 | 
						|
             oper.SetSize(typesize,true);
 | 
						|
         end
 | 
						|
        else
 | 
						|
         if not oper.SetupVar(tempstr,false) then
 | 
						|
          Message1(sym_e_unknown_id,tempstr);
 | 
						|
        { record.field ? }
 | 
						|
        if actasmtoken=AS_DOT then
 | 
						|
         begin
 | 
						|
           BuildRecordOffsetSize(tempstr,l,k,mangledname,false);
 | 
						|
           if (mangledname<>'') then
 | 
						|
             Message(asmr_e_invalid_reference_syntax);
 | 
						|
           inc(oper.opr.ref.offset,l);
 | 
						|
         end;
 | 
						|
      end;
 | 
						|
 | 
						|
 | 
						|
    procedure tppcattreader.ReadAt(oper : tppcoperand);
 | 
						|
      begin
 | 
						|
        { check for ...@ }
 | 
						|
        if actasmtoken=AS_AT then
 | 
						|
          begin
 | 
						|
            if (oper.opr.ref.symbol=nil) and
 | 
						|
               (oper.opr.ref.offset = 0) then
 | 
						|
              Message(asmr_e_invalid_reference_syntax);
 | 
						|
            Consume(AS_AT);
 | 
						|
            if actasmtoken=AS_ID then
 | 
						|
              begin
 | 
						|
                if upper(actasmpattern)='L' then
 | 
						|
                  oper.opr.ref.refaddr:=addr_low
 | 
						|
                else if upper(actasmpattern)='HI' then
 | 
						|
                  oper.opr.ref.refaddr:=addr_high
 | 
						|
                else if upper(actasmpattern)='HA' then
 | 
						|
                  oper.opr.ref.refaddr:=addr_higha
 | 
						|
                else
 | 
						|
                  Message(asmr_e_invalid_reference_syntax);
 | 
						|
                Consume(AS_ID);
 | 
						|
              end
 | 
						|
            else
 | 
						|
              Message(asmr_e_invalid_reference_syntax);
 | 
						|
          end;
 | 
						|
      end;
 | 
						|
 | 
						|
 | 
						|
    Procedure tppcattreader.BuildReference(oper : tppcoperand);
 | 
						|
 | 
						|
      procedure Consume_RParen;
 | 
						|
        begin
 | 
						|
          if actasmtoken <> AS_RPAREN then
 | 
						|
           Begin
 | 
						|
             Message(asmr_e_invalid_reference_syntax);
 | 
						|
             RecoverConsume(true);
 | 
						|
           end
 | 
						|
          else
 | 
						|
           begin
 | 
						|
             Consume(AS_RPAREN);
 | 
						|
             if not (actasmtoken in [AS_COMMA,AS_SEPARATOR,AS_END]) then
 | 
						|
              Begin
 | 
						|
                Message(asmr_e_invalid_reference_syntax);
 | 
						|
                RecoverConsume(true);
 | 
						|
              end;
 | 
						|
           end;
 | 
						|
        end;
 | 
						|
 | 
						|
      var
 | 
						|
        l : tcgint;
 | 
						|
        relsym: string;
 | 
						|
        asmsymtyp: tasmsymtype;
 | 
						|
        isflags: tindsymflags;
 | 
						|
 | 
						|
      begin
 | 
						|
        Consume(AS_LPAREN);
 | 
						|
        Case actasmtoken of
 | 
						|
          AS_INTNUM,
 | 
						|
          AS_MINUS,
 | 
						|
          AS_PLUS:
 | 
						|
            Begin
 | 
						|
              { offset(offset) is invalid }
 | 
						|
              If oper.opr.Ref.Offset <> 0 Then
 | 
						|
               Begin
 | 
						|
                 Message(asmr_e_invalid_reference_syntax);
 | 
						|
                 RecoverConsume(true);
 | 
						|
               End
 | 
						|
              Else
 | 
						|
               Begin
 | 
						|
                 oper.opr.Ref.Offset:=BuildConstExpression(false,true);
 | 
						|
                 Consume(AS_RPAREN);
 | 
						|
                 if actasmtoken=AS_AT then
 | 
						|
                   ReadAt(oper);
 | 
						|
               end;
 | 
						|
              exit;
 | 
						|
            End;
 | 
						|
          AS_REGISTER: { (reg ...  }
 | 
						|
            Begin
 | 
						|
              if ((oper.opr.typ=OPR_REFERENCE) and (oper.opr.ref.base<>NR_NO)) or
 | 
						|
                 ((oper.opr.typ=OPR_LOCAL) and (oper.opr.localsym.localloc.loc<>LOC_REGISTER)) then
 | 
						|
                message(asmr_e_cannot_index_relative_var);
 | 
						|
              oper.opr.ref.base:=actasmregister;
 | 
						|
              Consume(AS_REGISTER);
 | 
						|
              { can either be a register or a right parenthesis }
 | 
						|
              { (reg)        }
 | 
						|
              if actasmtoken=AS_RPAREN then
 | 
						|
               Begin
 | 
						|
                 { detect RTOC-based symbol accesses }
 | 
						|
                 if assigned(oper.opr.ref.symbol) and
 | 
						|
                    (oper.opr.ref.base=NR_RTOC) and
 | 
						|
                    (oper.opr.ref.offset=0) then
 | 
						|
                   begin
 | 
						|
                     { replace global symbol reference with TOC entry name
 | 
						|
                       for AIX }
 | 
						|
                     if target_info.system in systems_aix then
 | 
						|
                       tcgppcgen(cg).get_aix_toc_sym(nil,oper.opr.ref.symbol.name,asmsym2indsymflags(oper.opr.ref.symbol),oper.opr.ref,true);
 | 
						|
                     oper.opr.ref.refaddr:=addr_pic_no_got;
 | 
						|
                   end;
 | 
						|
                 Consume_RParen;
 | 
						|
                 exit;
 | 
						|
               end;
 | 
						|
              { (reg,reg ..  }
 | 
						|
              Consume(AS_COMMA);
 | 
						|
              if (actasmtoken=AS_REGISTER) and
 | 
						|
                 (oper.opr.Ref.Offset = 0) then
 | 
						|
               Begin
 | 
						|
                 oper.opr.ref.index:=actasmregister;
 | 
						|
                 Consume(AS_REGISTER);
 | 
						|
                 Consume_RParen;
 | 
						|
               end
 | 
						|
              else
 | 
						|
               Begin
 | 
						|
                 Message(asmr_e_invalid_reference_syntax);
 | 
						|
                 RecoverConsume(false);
 | 
						|
               end;
 | 
						|
            end; {end case }
 | 
						|
          AS_ID:
 | 
						|
            Begin
 | 
						|
              ReadSym(oper);
 | 
						|
              case actasmtoken of
 | 
						|
                AS_PLUS:
 | 
						|
                  begin
 | 
						|
                    { add a constant expression? }
 | 
						|
                    l:=BuildConstExpression(true,true);
 | 
						|
                    case oper.opr.typ of
 | 
						|
                      OPR_CONSTANT :
 | 
						|
                        inc(oper.opr.val,l);
 | 
						|
                      OPR_LOCAL :
 | 
						|
                        inc(oper.opr.localsymofs,l);
 | 
						|
                      OPR_REFERENCE :
 | 
						|
                        inc(oper.opr.ref.offset,l);
 | 
						|
                      else
 | 
						|
                        internalerror(200309202);
 | 
						|
                    end;
 | 
						|
                  end;
 | 
						|
                AS_MINUS:
 | 
						|
                  begin
 | 
						|
                    Consume(AS_MINUS);
 | 
						|
                    BuildConstSymbolExpression(false,true,false,l,relsym,asmsymtyp);
 | 
						|
                    if (relsym<>'') then
 | 
						|
                      begin
 | 
						|
                        if (oper.opr.typ = OPR_REFERENCE) then
 | 
						|
                          oper.opr.ref.relsymbol:=current_asmdata.RefAsmSymbol(relsym,asmsymtyp)
 | 
						|
                        else
 | 
						|
                          begin
 | 
						|
                            Message(asmr_e_invalid_reference_syntax);
 | 
						|
                            RecoverConsume(false);
 | 
						|
                          end
 | 
						|
                      end
 | 
						|
                    else
 | 
						|
                      begin
 | 
						|
                        case oper.opr.typ of
 | 
						|
                          OPR_CONSTANT :
 | 
						|
                            dec(oper.opr.val,l);
 | 
						|
                          OPR_LOCAL :
 | 
						|
                            dec(oper.opr.localsymofs,l);
 | 
						|
                          OPR_REFERENCE :
 | 
						|
                            dec(oper.opr.ref.offset,l);
 | 
						|
                          else
 | 
						|
                            internalerror(2007092601);
 | 
						|
                        end;
 | 
						|
                      end;
 | 
						|
                  end;
 | 
						|
              end;
 | 
						|
              Consume(AS_RPAREN);
 | 
						|
              if actasmtoken=AS_AT then
 | 
						|
                ReadAt(oper);
 | 
						|
            End;
 | 
						|
          AS_COMMA: { (, ...  can either be scaling, or index }
 | 
						|
            Begin
 | 
						|
              Consume(AS_COMMA);
 | 
						|
              { Index }
 | 
						|
              if (actasmtoken=AS_REGISTER) then
 | 
						|
                Begin
 | 
						|
                  oper.opr.ref.index:=actasmregister;
 | 
						|
                  Consume(AS_REGISTER);
 | 
						|
                  { check for scaling ... }
 | 
						|
                  Consume_RParen;
 | 
						|
                end
 | 
						|
              else
 | 
						|
                begin
 | 
						|
                  Message(asmr_e_invalid_reference_syntax);
 | 
						|
                  RecoverConsume(false);
 | 
						|
                end;
 | 
						|
            end;
 | 
						|
        else
 | 
						|
          Begin
 | 
						|
            Message(asmr_e_invalid_reference_syntax);
 | 
						|
            RecoverConsume(false);
 | 
						|
          end;
 | 
						|
        end;
 | 
						|
      end;
 | 
						|
 | 
						|
 | 
						|
    Procedure tppcattreader.BuildOperand(oper : tppcoperand);
 | 
						|
      var
 | 
						|
        expr : string;
 | 
						|
        typesize,l : tcgint;
 | 
						|
 | 
						|
 | 
						|
        procedure AddLabelOperand(hl:tasmlabel);
 | 
						|
          begin
 | 
						|
            if not(actasmtoken in [AS_PLUS,AS_MINUS,AS_LPAREN]) and
 | 
						|
               is_calljmp(actopcode) then
 | 
						|
             begin
 | 
						|
               oper.opr.typ:=OPR_SYMBOL;
 | 
						|
               oper.opr.symbol:=hl;
 | 
						|
             end
 | 
						|
            else
 | 
						|
             begin
 | 
						|
               oper.InitRef;
 | 
						|
               oper.opr.ref.symbol:=hl;
 | 
						|
             end;
 | 
						|
          end;
 | 
						|
 | 
						|
 | 
						|
        procedure MaybeRecordOffset;
 | 
						|
          var
 | 
						|
            mangledname: string;
 | 
						|
            hasdot  : boolean;
 | 
						|
            l,
 | 
						|
            toffset,
 | 
						|
            tsize   : tcgint;
 | 
						|
          begin
 | 
						|
            if not(actasmtoken in [AS_DOT,AS_PLUS,AS_MINUS]) then
 | 
						|
             exit;
 | 
						|
            l:=0;
 | 
						|
            mangledname:='';
 | 
						|
            hasdot:=(actasmtoken=AS_DOT);
 | 
						|
            if hasdot then
 | 
						|
              begin
 | 
						|
                if expr<>'' then
 | 
						|
                  begin
 | 
						|
                    BuildRecordOffsetSize(expr,toffset,tsize,mangledname,false);
 | 
						|
                    if (oper.opr.typ<>OPR_CONSTANT) and
 | 
						|
                       (mangledname<>'') then
 | 
						|
                      Message(asmr_e_wrong_sym_type);
 | 
						|
                    inc(l,toffset);
 | 
						|
                    oper.SetSize(tsize,true);
 | 
						|
                  end;
 | 
						|
              end;
 | 
						|
            if actasmtoken in [AS_PLUS,AS_MINUS] then
 | 
						|
              inc(l,BuildConstExpression(true,false));
 | 
						|
            case oper.opr.typ of
 | 
						|
              OPR_LOCAL :
 | 
						|
                begin
 | 
						|
                  { don't allow direct access to fields of parameters, because that
 | 
						|
                    will generate buggy code. Allow it only for explicit typecasting }
 | 
						|
                  if hasdot and
 | 
						|
                     (not oper.hastype) then
 | 
						|
                     checklocalsubscript(oper.opr.localsym);
 | 
						|
                  inc(oper.opr.localsymofs,l)
 | 
						|
                end;
 | 
						|
              OPR_CONSTANT :
 | 
						|
                if (mangledname<>'') then
 | 
						|
                  begin
 | 
						|
                    if (oper.opr.val<>0) then
 | 
						|
                      Message(asmr_e_wrong_sym_type);
 | 
						|
                    oper.opr.typ:=OPR_SYMBOL;
 | 
						|
                    oper.opr.symbol:=current_asmdata.DefineAsmSymbol(mangledname,AB_EXTERNAL,AT_FUNCTION,voidcodepointertype);
 | 
						|
                  end
 | 
						|
                else
 | 
						|
                  inc(oper.opr.val,l);
 | 
						|
              OPR_REFERENCE :
 | 
						|
                inc(oper.opr.ref.offset,l);
 | 
						|
              OPR_SYMBOL:
 | 
						|
                Message(asmr_e_invalid_symbol_ref);
 | 
						|
              else
 | 
						|
                internalerror(200309221);
 | 
						|
            end;
 | 
						|
          end;
 | 
						|
 | 
						|
 | 
						|
        function MaybeBuildReference:boolean;
 | 
						|
          { Try to create a reference, if not a reference is found then false
 | 
						|
            is returned }
 | 
						|
          begin
 | 
						|
            MaybeBuildReference:=true;
 | 
						|
            case actasmtoken of
 | 
						|
              AS_INTNUM,
 | 
						|
              AS_MINUS,
 | 
						|
              AS_PLUS:
 | 
						|
                Begin
 | 
						|
                  oper.opr.ref.offset:=BuildConstExpression(True,False);
 | 
						|
                  if actasmtoken<>AS_LPAREN then
 | 
						|
                    Message(asmr_e_invalid_reference_syntax)
 | 
						|
                  else
 | 
						|
                    BuildReference(oper);
 | 
						|
                end;
 | 
						|
              AS_LPAREN:
 | 
						|
                BuildReference(oper);
 | 
						|
              AS_ID: { only a variable is allowed ... }
 | 
						|
                Begin
 | 
						|
                  ReadSym(oper);
 | 
						|
                  case actasmtoken of
 | 
						|
                    AS_END,
 | 
						|
                    AS_SEPARATOR,
 | 
						|
                    AS_COMMA: ;
 | 
						|
                    AS_LPAREN:
 | 
						|
                      BuildReference(oper);
 | 
						|
                  else
 | 
						|
                    Begin
 | 
						|
                      Message(asmr_e_invalid_reference_syntax);
 | 
						|
                      Consume(actasmtoken);
 | 
						|
                    end;
 | 
						|
                  end; {end case }
 | 
						|
                end;
 | 
						|
              else
 | 
						|
               MaybeBuildReference:=false;
 | 
						|
            end; { end case }
 | 
						|
          end;
 | 
						|
 | 
						|
 | 
						|
      var
 | 
						|
        tempreg : tregister;
 | 
						|
        hl : tasmlabel;
 | 
						|
        ofs : tcgint;
 | 
						|
      Begin
 | 
						|
        expr:='';
 | 
						|
        case actasmtoken of
 | 
						|
          AS_LPAREN: { Memory reference or constant expression }
 | 
						|
            Begin
 | 
						|
              oper.InitRef;
 | 
						|
              BuildReference(oper);
 | 
						|
            end;
 | 
						|
 | 
						|
          AS_INTNUM,
 | 
						|
          AS_MINUS,
 | 
						|
          AS_PLUS:
 | 
						|
            Begin
 | 
						|
              { Constant memory offset }
 | 
						|
              { This must absolutely be followed by (  }
 | 
						|
              oper.InitRef;
 | 
						|
              oper.opr.ref.offset:=BuildConstExpression(True,False);
 | 
						|
              if actasmtoken<>AS_LPAREN then
 | 
						|
                begin
 | 
						|
                  ofs:=oper.opr.ref.offset;
 | 
						|
                  BuildConstantOperand(oper);
 | 
						|
                  inc(oper.opr.val,ofs);
 | 
						|
                end
 | 
						|
              else
 | 
						|
                BuildReference(oper);
 | 
						|
            end;
 | 
						|
 | 
						|
          AS_ID: { A constant expression, or a Variable ref.  }
 | 
						|
            Begin
 | 
						|
              { Local Label ? }
 | 
						|
              if is_locallabel(actasmpattern) then
 | 
						|
               begin
 | 
						|
                 CreateLocalLabel(actasmpattern,hl,false);
 | 
						|
                 Consume(AS_ID);
 | 
						|
                 AddLabelOperand(hl);
 | 
						|
               end
 | 
						|
              else
 | 
						|
               { Check for label }
 | 
						|
               if SearchLabel(actasmpattern,hl,false) then
 | 
						|
                begin
 | 
						|
                  Consume(AS_ID);
 | 
						|
                  AddLabelOperand(hl);
 | 
						|
                end
 | 
						|
              else
 | 
						|
               { probably a variable or normal expression }
 | 
						|
               { or a procedure (such as in CALL ID)      }
 | 
						|
               Begin
 | 
						|
                 { is it a constant ? }
 | 
						|
                 if SearchIConstant(actasmpattern,l) then
 | 
						|
                  Begin
 | 
						|
                    if not (oper.opr.typ in [OPR_NONE,OPR_CONSTANT]) then
 | 
						|
                     Message(asmr_e_invalid_operand_type);
 | 
						|
                    BuildConstantOperand(oper);
 | 
						|
                  end
 | 
						|
                 else
 | 
						|
                  begin
 | 
						|
                    expr:=actasmpattern;
 | 
						|
                    Consume(AS_ID);
 | 
						|
                    { typecasting? }
 | 
						|
                    if (actasmtoken=AS_LPAREN) and
 | 
						|
                       SearchType(expr,typesize) then
 | 
						|
                     begin
 | 
						|
                       oper.hastype:=true;
 | 
						|
                       Consume(AS_LPAREN);
 | 
						|
                       BuildOperand(oper);
 | 
						|
                       Consume(AS_RPAREN);
 | 
						|
                       if oper.opr.typ in [OPR_REFERENCE,OPR_LOCAL] then
 | 
						|
                         oper.SetSize(typesize,true);
 | 
						|
                     end
 | 
						|
                    else
 | 
						|
                     begin
 | 
						|
                       if oper.SetupVar(expr,false) then
 | 
						|
                         ReadAt(oper)
 | 
						|
                       else
 | 
						|
                        Begin
 | 
						|
                          { look for special symbols ... }
 | 
						|
                          if expr= '__HIGH' then
 | 
						|
                            begin
 | 
						|
                              consume(AS_LPAREN);
 | 
						|
                              if not oper.setupvar('high'+actasmpattern,false) then
 | 
						|
                                Message1(sym_e_unknown_id,'high'+actasmpattern);
 | 
						|
                              consume(AS_ID);
 | 
						|
                              consume(AS_RPAREN);
 | 
						|
                            end
 | 
						|
                          else
 | 
						|
                           if expr = '__RESULT' then
 | 
						|
                            oper.SetUpResult
 | 
						|
                          else
 | 
						|
                           if expr = '__SELF' then
 | 
						|
                            oper.SetupSelf
 | 
						|
                          else
 | 
						|
                           if expr = '__OLDEBP' then
 | 
						|
                            oper.SetupOldEBP
 | 
						|
                          else
 | 
						|
                            Message1(sym_e_unknown_id,expr);
 | 
						|
                        end;
 | 
						|
                     end;
 | 
						|
                  end;
 | 
						|
                  if actasmtoken=AS_DOT then
 | 
						|
                    MaybeRecordOffset;
 | 
						|
                  { add a constant expression? }
 | 
						|
                  if (actasmtoken=AS_PLUS) then
 | 
						|
                   begin
 | 
						|
                     l:=BuildConstExpression(true,false);
 | 
						|
                     case oper.opr.typ of
 | 
						|
                       OPR_CONSTANT :
 | 
						|
                         inc(oper.opr.val,l);
 | 
						|
                       OPR_LOCAL :
 | 
						|
                         inc(oper.opr.localsymofs,l);
 | 
						|
                       OPR_REFERENCE :
 | 
						|
                         inc(oper.opr.ref.offset,l);
 | 
						|
                       else
 | 
						|
                         internalerror(200309202);
 | 
						|
                     end;
 | 
						|
                   end
 | 
						|
               end;
 | 
						|
              { Do we have a indexing reference, then parse it also }
 | 
						|
              if actasmtoken=AS_LPAREN then
 | 
						|
                BuildReference(oper);
 | 
						|
            end;
 | 
						|
 | 
						|
          AS_REGISTER: { Register, a variable reference or a constant reference  }
 | 
						|
            Begin
 | 
						|
              { save the type of register used. }
 | 
						|
              tempreg:=actasmregister;
 | 
						|
              Consume(AS_REGISTER);
 | 
						|
              if (actasmtoken in [AS_END,AS_SEPARATOR,AS_COMMA]) then
 | 
						|
                if is_condreg(tempreg) and
 | 
						|
                   ((actopcode = A_BC) or
 | 
						|
                    (actopcode = A_BCCTR) or
 | 
						|
                    (actopcode = A_BCLR) or
 | 
						|
                    (actopcode = A_TW) or
 | 
						|
                    (actopcode = A_TWI)) then
 | 
						|
                  begin
 | 
						|
                    { it isn't a real operand, everything is stored in the condition }
 | 
						|
                    oper.opr.typ:=OPR_NONE;
 | 
						|
                    actcondition.cr := getsupreg(tempreg);
 | 
						|
                  end
 | 
						|
                else
 | 
						|
                  begin
 | 
						|
                    if not (oper.opr.typ in [OPR_NONE,OPR_REGISTER]) then
 | 
						|
                      Message(asmr_e_invalid_operand_type);
 | 
						|
                    oper.opr.typ:=OPR_REGISTER;
 | 
						|
                    oper.opr.reg:=tempreg;
 | 
						|
                  end
 | 
						|
              else if is_condreg(tempreg) then
 | 
						|
                begin
 | 
						|
                  if not(actcondition.cond in [C_T..C_DZF]) then
 | 
						|
                    Message(asmr_e_syn_operand);
 | 
						|
                  if actasmtoken=AS_STAR then
 | 
						|
                    begin
 | 
						|
                      consume(AS_STAR);
 | 
						|
                      if (actasmtoken=AS_INTNUM) then
 | 
						|
                        begin
 | 
						|
                          consume(AS_INTNUM);
 | 
						|
                          if actasmtoken=AS_PLUS then
 | 
						|
                            begin
 | 
						|
                              consume(AS_PLUS);
 | 
						|
                              if (actasmtoken=AS_ID) then
 | 
						|
                                begin
 | 
						|
                                  oper.opr.typ:=OPR_NONE;
 | 
						|
                                  if actasmpattern='LT' then
 | 
						|
                                    actcondition.crbit:=(getsupreg(tempreg)-(RS_CR0))*4
 | 
						|
                                  else if actasmpattern='GT' then
 | 
						|
                                    actcondition.crbit:=(getsupreg(tempreg)-(RS_CR0))*4+1
 | 
						|
                                  else if actasmpattern='EQ' then
 | 
						|
                                    actcondition.crbit:=(getsupreg(tempreg)-(RS_CR0))*4+2
 | 
						|
                                  else if actasmpattern='SO' then
 | 
						|
                                    actcondition.crbit:=(getsupreg(tempreg)-(RS_CR0))*4+3
 | 
						|
                                  else
 | 
						|
                                    Message(asmr_e_syn_operand);
 | 
						|
                                  consume(AS_ID);
 | 
						|
                                end
 | 
						|
                              else
 | 
						|
                                Message(asmr_e_syn_operand);
 | 
						|
                            end
 | 
						|
                          else
 | 
						|
                            Message(asmr_e_syn_operand);
 | 
						|
                        end
 | 
						|
                      else
 | 
						|
                        Message(asmr_e_syn_operand);
 | 
						|
                    end
 | 
						|
                  else
 | 
						|
                    Message(asmr_e_syn_operand);
 | 
						|
                end
 | 
						|
              else
 | 
						|
                Message(asmr_e_syn_operand);
 | 
						|
            end;
 | 
						|
          AS_END,
 | 
						|
          AS_SEPARATOR,
 | 
						|
          AS_COMMA: ;
 | 
						|
        else
 | 
						|
          Begin
 | 
						|
            Message(asmr_e_syn_operand);
 | 
						|
            Consume(actasmtoken);
 | 
						|
          end;
 | 
						|
        end; { end case }
 | 
						|
      end;
 | 
						|
 | 
						|
 | 
						|
{*****************************************************************************
 | 
						|
                                tppcattreader
 | 
						|
*****************************************************************************}
 | 
						|
 | 
						|
    procedure tppcattreader.BuildOpCode(instr : tppcinstruction);
 | 
						|
      var
 | 
						|
        operandnum : longint;
 | 
						|
      Begin
 | 
						|
        { opcode }
 | 
						|
        if (actasmtoken<>AS_OPCODE) then
 | 
						|
         Begin
 | 
						|
           Message(asmr_e_invalid_or_missing_opcode);
 | 
						|
           RecoverConsume(true);
 | 
						|
           exit;
 | 
						|
         end;
 | 
						|
        { Fill the instr object with the current state }
 | 
						|
        with instr do
 | 
						|
          begin
 | 
						|
            Opcode:=ActOpcode;
 | 
						|
            condition:=ActCondition;
 | 
						|
          end;
 | 
						|
 | 
						|
        { We are reading operands, so opcode will be an AS_ID }
 | 
						|
        operandnum:=1;
 | 
						|
        Consume(AS_OPCODE);
 | 
						|
        { Zero operand opcode ?  }
 | 
						|
        if actasmtoken in [AS_SEPARATOR,AS_END] then
 | 
						|
         begin
 | 
						|
           operandnum:=0;
 | 
						|
           exit;
 | 
						|
         end;
 | 
						|
        { Read the operands }
 | 
						|
        repeat
 | 
						|
          case actasmtoken of
 | 
						|
            AS_COMMA: { Operand delimiter }
 | 
						|
              Begin
 | 
						|
                if operandnum>Max_Operands then
 | 
						|
                  Message(asmr_e_too_many_operands)
 | 
						|
                else
 | 
						|
                  begin
 | 
						|
                    { condition operands doesn't set the operand but write to the
 | 
						|
                      condition field of the instruction
 | 
						|
                    }
 | 
						|
                    if instr.Operands[operandnum].opr.typ<>OPR_NONE then
 | 
						|
                      Inc(operandnum);
 | 
						|
                  end;
 | 
						|
                Consume(AS_COMMA);
 | 
						|
              end;
 | 
						|
            AS_SEPARATOR,
 | 
						|
            AS_END : { End of asm operands for this opcode  }
 | 
						|
              begin
 | 
						|
                break;
 | 
						|
              end;
 | 
						|
          else
 | 
						|
            BuildOperand(instr.Operands[operandnum] as tppcoperand);
 | 
						|
          end; { end case }
 | 
						|
        until false;
 | 
						|
        if (operandnum=1) and (instr.Operands[operandnum].opr.typ=OPR_NONE) then
 | 
						|
          dec(operandnum);
 | 
						|
        instr.Ops:=operandnum;
 | 
						|
      end;
 | 
						|
 | 
						|
 | 
						|
    function tppcattreader.is_asmopcode(const s: string):boolean;
 | 
						|
      var
 | 
						|
        cond  : tasmcondflag;
 | 
						|
        hs : string;
 | 
						|
 | 
						|
      Begin
 | 
						|
        { making s a value parameter would break other assembler readers }
 | 
						|
        hs:=s;
 | 
						|
        is_asmopcode:=false;
 | 
						|
 | 
						|
        { clear op code }
 | 
						|
        actopcode:=A_None;
 | 
						|
        { clear condition }
 | 
						|
        fillchar(actcondition,sizeof(actcondition),0);
 | 
						|
 | 
						|
        { check for direction hint }
 | 
						|
        if hs[length(s)]='-' then
 | 
						|
          begin
 | 
						|
            dec(ord(hs[0]));
 | 
						|
            actcondition.dirhint:=DH_Minus;
 | 
						|
          end
 | 
						|
        else if hs[length(s)]='+' then
 | 
						|
          begin
 | 
						|
            dec(ord(hs[0]));
 | 
						|
            actcondition.dirhint:=DH_Plus;
 | 
						|
          end;
 | 
						|
	actopcode := tasmop(ptruint(iasmops.find(hs)));
 | 
						|
        if actopcode <> A_NONE then
 | 
						|
          begin
 | 
						|
            if actcondition.dirhint<>DH_None then
 | 
						|
              message1(asmr_e_unknown_opcode,actasmpattern);
 | 
						|
            actasmtoken:=AS_OPCODE;
 | 
						|
            is_asmopcode:=true;
 | 
						|
            exit;
 | 
						|
          end;
 | 
						|
        { not found, check branch instructions }
 | 
						|
        if hs[1]='B' then
 | 
						|
          begin
 | 
						|
            { we can search here without an extra table which is sorted by string length
 | 
						|
              because we take the whole remaining string without the leading B }
 | 
						|
            if copy(hs,length(s)-1,2)='LR' then
 | 
						|
              begin
 | 
						|
                actopcode := A_BCLR;
 | 
						|
                setlength(hs,length(hs)-2)
 | 
						|
              end
 | 
						|
            else if copy(hs,length(s)-2,3)='CTR' then
 | 
						|
              begin
 | 
						|
                actopcode := A_BCCTR;
 | 
						|
                setlength(hs,length(hs)-3)
 | 
						|
              end
 | 
						|
            else
 | 
						|
              actopcode := A_BC;
 | 
						|
            for cond:=low(TAsmCondFlag) to high(TAsmCondFlag) do
 | 
						|
              if copy(hs,2,length(s)-1)=UpperAsmCondFlag2Str[cond] then
 | 
						|
                begin
 | 
						|
                  actcondition.simple:=true;
 | 
						|
                  actcondition.cond:=cond;
 | 
						|
                  if (cond in [C_LT,C_LE,C_EQ,C_GE,C_GT,C_NL,C_NE,C_NG,C_SO,C_NS,C_UN,C_NU]) then
 | 
						|
                    actcondition.cr := RS_CR0;
 | 
						|
                  actasmtoken:=AS_OPCODE;
 | 
						|
                  is_asmopcode:=true;
 | 
						|
                  exit;
 | 
						|
                end;
 | 
						|
          end;
 | 
						|
      end;
 | 
						|
 | 
						|
    procedure tppcattreader.ConvertCalljmp(instr : tppcinstruction);
 | 
						|
      begin
 | 
						|
        if instr.Operands[1].opr.typ = OPR_CONSTANT then
 | 
						|
          begin
 | 
						|
            if (instr.operands[1].opr.val > 31) or
 | 
						|
               (instr.operands[2].opr.typ <> OPR_CONSTANT) or
 | 
						|
               (instr.operands[2].opr.val > 31) or
 | 
						|
               not(instr.operands[3].opr.typ in [OPR_REFERENCE,OPR_SYMBOL]) then
 | 
						|
              Message(asmr_e_syn_operand);
 | 
						|
            { BO/BI notation }
 | 
						|
            instr.condition.simple := false;
 | 
						|
            instr.condition.bo := instr.operands[1].opr.val;
 | 
						|
            instr.condition.bi := instr.operands[2].opr.val;
 | 
						|
            instr.operands[1].free;
 | 
						|
            instr.operands[2].free;
 | 
						|
            instr.operands[2] := nil;
 | 
						|
            instr.operands[1] := instr.operands[3];
 | 
						|
            instr.operands[3] := nil;
 | 
						|
            instr.ops := 1;
 | 
						|
          end;
 | 
						|
        if instr.Operands[1].opr.typ = OPR_REFERENCE then
 | 
						|
          begin
 | 
						|
            instr.Operands[1].opr.ref.refaddr:=addr_full;
 | 
						|
            if (instr.Operands[1].opr.ref.base<>NR_NO) or
 | 
						|
               (instr.Operands[1].opr.ref.index<>NR_NO) then
 | 
						|
              Message(asmr_e_syn_operand);
 | 
						|
            if use_dotted_functions and
 | 
						|
               assigned(instr.Operands[1].opr.ref.symbol) then
 | 
						|
              instr.Operands[1].opr.ref.symbol:=current_asmdata.DefineAsmSymbol('.'+instr.Operands[1].opr.ref.symbol.name,instr.Operands[1].opr.ref.symbol.bind,AT_FUNCTION,voidcodepointertype);
 | 
						|
          end;
 | 
						|
        { regular name is toc entry, .-based name is actual code }
 | 
						|
        if use_dotted_functions and
 | 
						|
           (instr.Operands[1].opr.typ = OPR_SYMBOL) and
 | 
						|
           (instr.Operands[1].opr.symbol.typ=AT_FUNCTION) then
 | 
						|
          instr.Operands[1].opr.symbol:=current_asmdata.DefineAsmSymbol('.'+instr.Operands[1].opr.symbol.name,instr.Operands[1].opr.symbol.bind,AT_FUNCTION,voidcodepointertype);
 | 
						|
      end;
 | 
						|
 | 
						|
 | 
						|
    procedure tppcattreader.handleopcode;
 | 
						|
      var
 | 
						|
        instr : tppcinstruction;
 | 
						|
      begin
 | 
						|
        instr:=TPPCInstruction.Create(TPPCOperand);
 | 
						|
        BuildOpcode(instr);
 | 
						|
        instr.condition := actcondition;
 | 
						|
        if is_calljmp(instr.opcode) then
 | 
						|
          ConvertCalljmp(instr);
 | 
						|
        {
 | 
						|
        instr.AddReferenceSizes;
 | 
						|
        instr.SetInstructionOpsize;
 | 
						|
        instr.CheckOperandSizes;
 | 
						|
        }
 | 
						|
        instr.ConcatInstruction(curlist);
 | 
						|
        instr.Free;
 | 
						|
      end;
 | 
						|
 | 
						|
 | 
						|
{*****************************************************************************
 | 
						|
                                     Initialize
 | 
						|
*****************************************************************************}
 | 
						|
 | 
						|
const
 | 
						|
  asmmode_ppc_att_info : tasmmodeinfo =
 | 
						|
          (
 | 
						|
            id    : asmmode_ppc_gas;
 | 
						|
            idtxt : 'GAS';
 | 
						|
            casmreader : tppcattreader;
 | 
						|
          );
 | 
						|
 | 
						|
  asmmode_ppc_standard_info : tasmmodeinfo =
 | 
						|
          (
 | 
						|
            id    : asmmode_standard;
 | 
						|
            idtxt : 'STANDARD';
 | 
						|
            casmreader : tppcattreader;
 | 
						|
          );
 | 
						|
 | 
						|
initialization
 | 
						|
  RegisterAsmMode(asmmode_ppc_att_info);
 | 
						|
  RegisterAsmMode(asmmode_ppc_standard_info);
 | 
						|
end.
 |