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@@ -0,0 +1,607 @@
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+{
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+ $Id$
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+ Copyright (c) 1998-2002 by Carl Eric Codere and Peter Vreman
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+
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+ Does the parsing for the i386 GNU AS styled inline assembler.
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+
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+ This program is free software; you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
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+ the Free Software Foundation; either version 2 of the License, or
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+ (at your option) any later version.
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+
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+ This program is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with this program; if not, write to the Free Software
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+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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+
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+ ****************************************************************************
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+}
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+Unit rappcatt;
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+
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+{$i fpcdefs.inc}
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+
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+ Interface
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+
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+ uses
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+ raatt,rappc;
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+
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+ type
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+ tppcattreader = class(tattreader)
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+ function is_asmopcode(const s: string):boolean;override;
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+ procedure handleopcode;override;
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+ procedure BuildReference(oper : tppcoperand);
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+ procedure BuildOperand(oper : tppcoperand);
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+ procedure BuildOpCode(instr : tppcinstruction);
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+ end;
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+
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+
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+ Implementation
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+
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+ uses
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+ { helpers }
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+ cutils,
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+ { global }
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+ globtype,globals,verbose,
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+ systems,
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+ { aasm }
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+ cpubase,cpuinfo,aasmbase,aasmtai,aasmcpu,
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+ { symtable }
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+ symconst,symbase,symtype,symsym,symtable,
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+ { parser }
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+ scanner,
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+ procinfo,
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+ itcpugas,
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+ rabase,rautils,
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+ cgbase,cgobj
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+ ;
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+
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+ Procedure tppcattreader.BuildReference(oper : tppcoperand);
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+
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+ procedure Consume_RParen;
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+ begin
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+ if actasmtoken <> AS_RPAREN then
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+ Begin
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+ Message(asmr_e_invalid_reference_syntax);
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+ RecoverConsume(true);
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+ end
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+ else
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+ begin
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+ Consume(AS_RPAREN);
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+ if not (actasmtoken in [AS_COMMA,AS_SEPARATOR,AS_END]) then
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+ Begin
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+ Message(asmr_e_invalid_reference_syntax);
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+ RecoverConsume(true);
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+ end;
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+ end;
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+ end;
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+
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+
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+ begin
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+ oper.InitRef;
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+ Consume(AS_LPAREN);
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+ Case actasmtoken of
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+ AS_INTNUM,
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+ AS_MINUS,
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+ AS_PLUS: { absolute offset, such as fs:(0x046c) }
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+ Begin
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+ { offset(offset) is invalid }
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+ If oper.opr.Ref.Offset <> 0 Then
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+ Begin
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+ Message(asmr_e_invalid_reference_syntax);
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+ RecoverConsume(true);
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+ End
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+ Else
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+ Begin
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+ oper.opr.Ref.Offset:=BuildConstExpression(false,true);
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+ Consume_RParen;
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+ end;
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+ exit;
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+ End;
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+ AS_REGISTER: { (reg ... }
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+ Begin
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+ { Check if there is already a base (mostly ebp,esp) than this is
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+ not allowed, because it will give crashing code }
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+ if ((oper.opr.typ=OPR_REFERENCE) and (oper.opr.ref.base<>NR_NO)) or
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+ ((oper.opr.typ=OPR_LOCAL) and (oper.opr.localsym.localloc.loc<>LOC_REGISTER)) then
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+ message(asmr_e_cannot_index_relative_var);
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+ oper.opr.ref.base:=actasmregister;
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+ Consume(AS_REGISTER);
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+ { can either be a register or a right parenthesis }
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+ { (reg) }
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+ if actasmtoken=AS_RPAREN then
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+ Begin
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+ Consume_RParen;
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+ exit;
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+ end;
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+ { (reg,reg .. }
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+ Consume(AS_COMMA);
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+ if actasmtoken=AS_REGISTER then
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+ Begin
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+ oper.opr.ref.index:=actasmregister;
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+ Consume(AS_REGISTER);
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+ Consume_RParen;
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+ end
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+ else
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+ Begin
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+ Message(asmr_e_invalid_reference_syntax);
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+ RecoverConsume(false);
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+ end;
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+ end; {end case }
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+ AS_COMMA: { (, ... can either be scaling, or index }
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+ Begin
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+ Consume(AS_COMMA);
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+ { Index }
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+ if (actasmtoken=AS_REGISTER) then
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+ Begin
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+ oper.opr.ref.index:=actasmregister;
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+ Consume(AS_REGISTER);
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+ { check for scaling ... }
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+ Consume_RParen;
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+ end
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+ else
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+ begin
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+ Message(asmr_e_invalid_reference_syntax);
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+ RecoverConsume(false);
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+ end;
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+ end;
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+ else
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+ Begin
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+ Message(asmr_e_invalid_reference_syntax);
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+ RecoverConsume(false);
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+ end;
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+ end;
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+ end;
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+
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+
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+ Procedure tppcattreader.BuildOperand(oper : tppcoperand);
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+ var
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+ tempstr,
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+ expr : string;
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+ typesize,
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+ l,k : longint;
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+
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+
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+ procedure AddLabelOperand(hl:tasmlabel);
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+ begin
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+ if not(actasmtoken in [AS_PLUS,AS_MINUS,AS_LPAREN]) and
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+ is_calljmp(actopcode) then
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+ begin
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+ oper.opr.typ:=OPR_SYMBOL;
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+ oper.opr.symbol:=hl;
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+ end
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+ else
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+ begin
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+ oper.InitRef;
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+ oper.opr.ref.symbol:=hl;
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+ end;
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+ end;
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+
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+
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+ procedure MaybeRecordOffset;
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+ var
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+ hasdot : boolean;
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+ l,
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+ toffset,
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+ tsize : longint;
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+ begin
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+ if not(actasmtoken in [AS_DOT,AS_PLUS,AS_MINUS]) then
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+ exit;
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+ l:=0;
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+ hasdot:=(actasmtoken=AS_DOT);
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+ if hasdot then
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+ begin
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+ if expr<>'' then
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+ begin
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+ BuildRecordOffsetSize(expr,toffset,tsize);
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+ inc(l,toffset);
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+ oper.SetSize(tsize,true);
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+ end;
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+ end;
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+ if actasmtoken in [AS_PLUS,AS_MINUS] then
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+ inc(l,BuildConstExpression(true,false));
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+ case oper.opr.typ of
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+ OPR_LOCAL :
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+ begin
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+ { don't allow direct access to fields of parameters, because that
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+ will generate buggy code. Allow it only for explicit typecasting }
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+ if hasdot and
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+ (not oper.hastype) and
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+ (tvarsym(oper.opr.localsym).owner.symtabletype=parasymtable) and
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+ (current_procinfo.procdef.proccalloption<>pocall_register) then
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+ Message(asmr_e_cannot_access_field_directly_for_parameters);
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+ inc(oper.opr.localsymofs,l)
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+ end;
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+ OPR_CONSTANT :
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+ inc(oper.opr.val,l);
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+ OPR_REFERENCE :
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+ inc(oper.opr.ref.offset,l);
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+ else
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+ internalerror(200309221);
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+ end;
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+ end;
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+
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+
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+ function MaybeBuildReference:boolean;
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+ { Try to create a reference, if not a reference is found then false
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+ is returned }
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+ begin
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+ MaybeBuildReference:=true;
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+ case actasmtoken of
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+ AS_INTNUM,
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+ AS_MINUS,
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+ AS_PLUS:
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+ Begin
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+ oper.opr.ref.offset:=BuildConstExpression(True,False);
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+ if actasmtoken<>AS_LPAREN then
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+ Message(asmr_e_invalid_reference_syntax)
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+ else
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+ BuildReference(oper);
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+ end;
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+ AS_LPAREN:
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+ BuildReference(oper);
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+ AS_ID: { only a variable is allowed ... }
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+ Begin
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+ tempstr:=actasmpattern;
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+ Consume(AS_ID);
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+ { typecasting? }
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+ if (actasmtoken=AS_LPAREN) and
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+ SearchType(tempstr,typesize) then
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+ begin
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+ oper.hastype:=true;
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+ Consume(AS_LPAREN);
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+ BuildOperand(oper);
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+ Consume(AS_RPAREN);
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+ if oper.opr.typ in [OPR_REFERENCE,OPR_LOCAL] then
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+ oper.SetSize(typesize,true);
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+ end
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+ else
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+ if not oper.SetupVar(tempstr,false) then
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+ Message1(sym_e_unknown_id,tempstr);
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+ { record.field ? }
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+ if actasmtoken=AS_DOT then
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+ begin
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+ BuildRecordOffsetSize(tempstr,l,k);
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+ inc(oper.opr.ref.offset,l);
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+ end;
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+ case actasmtoken of
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+ AS_END,
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+ AS_SEPARATOR,
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+ AS_COMMA: ;
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+ AS_LPAREN:
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+ BuildReference(oper);
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+ else
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+ Begin
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+ Message(asmr_e_invalid_reference_syntax);
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+ Consume(actasmtoken);
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+ end;
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+ end; {end case }
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+ end;
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+ else
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+ MaybeBuildReference:=false;
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+ end; { end case }
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+ end;
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+
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+
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+ var
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+ tempreg : tregister;
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+ hl : tasmlabel;
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+ Begin
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+ expr:='';
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+ case actasmtoken of
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+ AS_LPAREN: { Memory reference or constant expression }
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+ Begin
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+ oper.InitRef;
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+ BuildReference(oper);
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+ end;
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+
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+ AS_DOLLAR: { Constant expression }
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+ Begin
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+ Consume(AS_DOLLAR);
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+ BuildConstantOperand(oper);
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+ end;
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+
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+ AS_INTNUM,
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+ AS_MINUS,
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+ AS_PLUS:
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+ Begin
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+ { Constant memory offset }
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+ { This must absolutely be followed by ( }
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+ oper.InitRef;
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+ oper.opr.ref.offset:=BuildConstExpression(True,False);
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+ if actasmtoken<>AS_LPAREN then
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+ BuildConstantOperand(oper)
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+ else
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+ BuildReference(oper);
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+ end;
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+
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+ AS_ID: { A constant expression, or a Variable ref. }
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+ Begin
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+ { Local Label ? }
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+ if is_locallabel(actasmpattern) then
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+ begin
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+ CreateLocalLabel(actasmpattern,hl,false);
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+ Consume(AS_ID);
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+ AddLabelOperand(hl);
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+ end
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+ else
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+ { Check for label }
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+ if SearchLabel(actasmpattern,hl,false) then
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+ begin
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+ Consume(AS_ID);
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+ AddLabelOperand(hl);
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+ end
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+ else
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+ { probably a variable or normal expression }
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+ { or a procedure (such as in CALL ID) }
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+ Begin
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+ { is it a constant ? }
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+ if SearchIConstant(actasmpattern,l) then
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+ Begin
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+ if not (oper.opr.typ in [OPR_NONE,OPR_CONSTANT]) then
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+ Message(asmr_e_invalid_operand_type);
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+ BuildConstantOperand(oper);
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+ end
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+ else
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+ begin
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+ expr:=actasmpattern;
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+ Consume(AS_ID);
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+ { typecasting? }
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+ if (actasmtoken=AS_LPAREN) and
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+ SearchType(expr,typesize) then
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+ begin
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+ oper.hastype:=true;
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+ Consume(AS_LPAREN);
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+ BuildOperand(oper);
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+ Consume(AS_RPAREN);
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+ if oper.opr.typ in [OPR_REFERENCE,OPR_LOCAL] then
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+ oper.SetSize(typesize,true);
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+ end
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+ else
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+ begin
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+ if oper.SetupVar(expr,false) then
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+ begin
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+ end
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+ else
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+ Begin
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+ { look for special symbols ... }
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+ if expr= '__HIGH' then
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+ begin
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+ consume(AS_LPAREN);
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+ if not oper.setupvar('high'+actasmpattern,false) then
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+ Message1(sym_e_unknown_id,'high'+actasmpattern);
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+ consume(AS_ID);
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+ consume(AS_RPAREN);
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+ end
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+ else
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+ if expr = '__RESULT' then
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+ oper.SetUpResult
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+ else
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+ if expr = '__SELF' then
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+ oper.SetupSelf
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+ else
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+ if expr = '__OLDEBP' then
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+ oper.SetupOldEBP
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+ else
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+ { check for direct symbolic names }
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+ { only if compiling the system unit }
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+ if (cs_compilesystem in aktmoduleswitches) then
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+ begin
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+ if not oper.SetupDirectVar(expr) then
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+ Begin
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+ { not found, finally ... add it anyways ... }
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+ Message1(asmr_w_id_supposed_external,expr);
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+ oper.InitRef;
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+ oper.opr.ref.symbol:=objectlibrary.newasmsymbol(expr);
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+ end;
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+ end
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+ else
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+ Message1(sym_e_unknown_id,expr);
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+ end;
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+ end;
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+ end;
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+ if actasmtoken=AS_DOT then
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+ MaybeRecordOffset;
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+ { add a constant expression? }
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+ if (actasmtoken=AS_PLUS) then
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+ begin
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+ l:=BuildConstExpression(true,false);
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+ case oper.opr.typ of
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+ OPR_CONSTANT :
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+ inc(oper.opr.val,l);
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+ OPR_LOCAL :
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+ inc(oper.opr.localsymofs,l);
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+ OPR_REFERENCE :
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+ inc(oper.opr.ref.offset,l);
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+ else
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+ internalerror(200309202);
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+ end;
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+ end
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+ end;
|
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+ { Do we have a indexing reference, then parse it also }
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+ if actasmtoken=AS_LPAREN then
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+ BuildReference(oper);
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+ end;
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+
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+ AS_REGISTER: { Register, a variable reference or a constant reference }
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+ Begin
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+ { save the type of register used. }
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+ tempreg:=actasmregister;
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+ Consume(AS_REGISTER);
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+ if (actasmtoken in [AS_END,AS_SEPARATOR,AS_COMMA]) then
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+ Begin
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+ if not (oper.opr.typ in [OPR_NONE,OPR_REGISTER]) then
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+ Message(asmr_e_invalid_operand_type);
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+ oper.opr.typ:=OPR_REGISTER;
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+ oper.opr.reg:=tempreg;
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+ end
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+ else
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+ Message(asmr_e_syn_operand);
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+ 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
|
|
|
+ Inc(operandnum);
|
|
|
+ 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;
|
|
|
+ instr.Ops:=operandnum;
|
|
|
+ end;
|
|
|
+
|
|
|
+
|
|
|
+ function tppcattreader.is_asmopcode(const s: string):boolean;
|
|
|
+ var
|
|
|
+ str2opentry: tstr2opentry;
|
|
|
+ cond : tasmcondflag;
|
|
|
+ len,
|
|
|
+ j,
|
|
|
+ sufidx : longint;
|
|
|
+ hs : string;
|
|
|
+
|
|
|
+ Begin
|
|
|
+ { making s a value parameter would break other assembler readers }
|
|
|
+ hs:=s;
|
|
|
+ is_asmopcode:=false;
|
|
|
+
|
|
|
+ actopcode:=A_None;
|
|
|
+ actcondition.cond:=C_None;
|
|
|
+
|
|
|
+ { check for direction hint }
|
|
|
+ if hs[length(s)]='-' then
|
|
|
+ begin
|
|
|
+ dec(ord(hs[0]));
|
|
|
+ actcondition.dirhint:=DH_Minus;
|
|
|
+ end;
|
|
|
+ str2opentry:=tstr2opentry(iasmops.search(copy(hs,1,len)));
|
|
|
+ if assigned(str2opentry) then
|
|
|
+ begin
|
|
|
+ if actcondition.dirhint<>DH_None then
|
|
|
+ message1(asmr_e_unknown_opcode,actasmpattern);
|
|
|
+ actopcode:=str2opentry.op;
|
|
|
+ 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 }
|
|
|
+ for cond:=low(TAsmCondFlag) to high(TAsmCondFlag) do
|
|
|
+ if copy(hs,2,length(s)-1)=UpperAsmCondFlag2Str[cond] then
|
|
|
+ begin
|
|
|
+ actopcode:=A_B;
|
|
|
+ actcondition.simple:=true;
|
|
|
+ actcondition.cond:=cond;
|
|
|
+ actasmtoken:=AS_OPCODE;
|
|
|
+ is_asmopcode:=true;
|
|
|
+ exit;
|
|
|
+ end;
|
|
|
+ end;
|
|
|
+
|
|
|
+ end;
|
|
|
+
|
|
|
+
|
|
|
+ procedure tppcattreader.handleopcode;
|
|
|
+ var
|
|
|
+ instr : tppcinstruction;
|
|
|
+ begin
|
|
|
+ instr:=TPPCInstruction.Create(TPPCOperand);
|
|
|
+ BuildOpcode(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.
|
|
|
+{
|
|
|
+ $Log$
|
|
|
+ Revision 1.1 2003-11-06 20:48:02 florian
|
|
|
+ * initial revision
|
|
|
+}
|
florian