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@@ -0,0 +1,704 @@
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+{
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+ Copyright (c) 1998-2002 by Mazen NEIFER
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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 racpugas;
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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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+ rautils,
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+ raatt;
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+
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+ type
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+ tMipsReader = class(tattreader)
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+ function is_asmopcode(const s: string):boolean;override;
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+ procedure BuildReference(oper : TOperand);
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+ procedure BuildOperand(oper : TOperand);
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+ procedure BuildOpCode(instr : TInstruction);
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+ procedure ReadPercent(oper : TOperand);
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+ procedure ReadSym(oper : TOperand);
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+ procedure ConvertCalljmp(instr : TInstruction);
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+ procedure handlepercent;override;
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+ procedure handledollar;override;
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+ procedure handleopcode;override;
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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,verbose,
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+ systems,
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+ { aasm }
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+ cpubase,aasmbase,aasmtai,aasmdata,aasmcpu,
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+ { symtable }
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+ symconst,symsym,
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+ { parser }
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+ scanner,
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+ procinfo,
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+ rabase,
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+ itcpugas,
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+ cgbase,cgobj
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+ ;
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+
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+ procedure TMipsReader.ReadSym(oper : TOperand);
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+ var
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+ tempstr, mangledname : string;
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+ typesize,l,k : aint;
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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,mangledname,false);
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+ if (mangledname<>'') then
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+ Message(asmr_e_invalid_reference_syntax);
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+ inc(oper.opr.ref.offset,l);
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+ end;
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+ end;
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+
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+
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+ procedure TMipsReader.handledollar;
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+ begin
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+ Inherited handledollar;
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+ if (c in ['0'..'9','a'..'z']) then
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+ begin
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+ Consume(AS_DOLLAR);
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+ if (actasmtoken=AS_INTNUM) or (actasmtoken=AS_ID) then
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+ begin
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+ { Try to convert to std register }
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+ if actasmtoken=AS_INTNUM then
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+ actasmregister:=gas_regnum_search('r'+actasmpattern)
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+ else
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+ begin
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+ { AS_ID is uppercased by default but register names
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+ are lowercase }
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+ actasmpattern:=lower(actasmpattern);
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+ actasmregister:=gas_regnum_search(actasmpattern);
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+ if actasmregister=NR_NO then
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+ actasmregister:=std_regnum_search(actasmpattern);
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+ end;
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+ if actasmregister<>NR_NO then
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+ begin
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+ // Consume(actasmtoken);
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+ actasmtoken:=AS_REGISTER;
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+ end;
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+ end;
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+ end;
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+ end;
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+
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+ procedure TMipsReader.ReadPercent(oper : TOperand);
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+ begin
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+ { check for ...@ }
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+ if actasmtoken=AS_AT then
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+ begin
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+ if (oper.opr.ref.symbol=nil) and
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+ (oper.opr.ref.offset = 0) then
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+ Message(asmr_e_invalid_reference_syntax);
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+ Consume(AS_AT);
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+ if actasmtoken=AS_ID then
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+ begin
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+ if upper(actasmpattern)='LO' then
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+ oper.opr.ref.refaddr:=addr_low
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+ else if upper(actasmpattern)='HI' then
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+ oper.opr.ref.refaddr:=addr_high
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+ else
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+ Message(asmr_e_invalid_reference_syntax);
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+ Consume(AS_ID);
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+ end
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+ else
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+ Message(asmr_e_invalid_reference_syntax);
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+ end;
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+ end;
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+
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+
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+ Procedure TMipsReader.BuildReference(oper : TOperand);
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+ var
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+ l : aint;
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+ regs : byte;
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+ opening : TAsmToken;
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+ hasimm : boolean;
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+ begin
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+ oper.initref;
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+ regs:=0;
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+ hasimm:=false;
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+ opening:=ActAsmToken;
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+ Consume(ActAsmToken);
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+ repeat
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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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+ if hasimm or (regs>1) 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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+ break;
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+ End;
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+ oper.opr.Ref.Offset:=BuildConstExpression(false,true);
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+ hasimm:=true;
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+ End;
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+
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+ AS_REGISTER:
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+ Begin
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+ if regs<2 then
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+ begin
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+ if regs=0 then
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+ oper.opr.ref.base:=actasmregister
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+ else
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+ oper.opr.ref.index:=actasmregister;
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+ inc(regs);
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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(true);
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+ break;
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+ end;
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+ Consume(AS_REGISTER);
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+ end;
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+
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+ AS_ID:
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+ Begin
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+ l:=BuildConstExpression(true,true);
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+ inc(oper.opr.ref.offset,l);
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+ End;
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+
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+ AS_RPAREN,
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+ AS_RBRACKET:
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+ begin
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+ if (regs=0) and (not hasimm) then
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+ Message(asmr_e_invalid_reference_syntax);
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+ if opening=AS_LPAREN then
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+ Consume(AS_RPAREN)
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+ else
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+ Consume(AS_RBRACKET);
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+ break;
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+ end;
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+
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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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+ break;
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+ end;
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+ end;
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+ until false;
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+ end;
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+
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+
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+ procedure TMipsReader.handlepercent;
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+ var
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+ len : longint;
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+ begin
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+ len:=1;
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+ actasmpattern[len]:='%';
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+ c:=current_scanner.asmgetchar;
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+ { to be a register there must be a letter and not a number }
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+ while c in ['a'..'z','A'..'Z','0'..'9'] do
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+ Begin
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+ inc(len);
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+ actasmpattern[len]:=c;
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+ c:=current_scanner.asmgetchar;
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+ end;
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+ actasmpattern[0]:=chr(len);
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+ uppervar(actasmpattern);
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+ if is_register(actasmpattern) then
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+ exit;
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+ if (actasmpattern='%HI') then
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+ actasmtoken:=AS_HI
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+ else if (actasmpattern='%LO')then
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+ actasmtoken:=AS_LO
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+ else
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+ Message(asmr_e_invalid_register);
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+ end;
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+
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+
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+ Procedure TMipsReader.BuildOperand(oper : TOperand);
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+ var
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+ expr : string;
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+ typesize,l : aint;
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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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+ mangledname: string;
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+ hasdot : boolean;
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+ l,
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+ toffset,
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+ tsize : aint;
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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,mangledname,false);
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+ if (oper.opr.typ<>OPR_CONSTANT) and
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+ (mangledname<>'') then
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+ Message(asmr_e_wrong_sym_type);
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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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+ (tabstractnormalvarsym(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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+ if (mangledname<>'') then
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+ begin
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+ if (oper.opr.val<>0) then
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+ Message(asmr_e_wrong_sym_type);
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+ oper.opr.typ:=OPR_SYMBOL;
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+ oper.opr.symbol:=current_asmdata.RefAsmSymbol(mangledname);
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+ end
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+ else
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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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+ OPR_SYMBOL:
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+ Message(asmr_e_invalid_symbol_ref);
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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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+ var
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+ tempreg : tregister;
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+ tempstr : string;
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+ tempsymtyp : TAsmSymType;
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+ hl : tasmlabel;
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+ gotplus,
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+ negative : boolean;
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+ Begin
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+ expr:='';
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+ gotplus:=true;
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+ negative:=false;
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+ repeat
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+ case actasmtoken of
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+ AS_MINUS :
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+ begin
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+ consume(AS_MINUS);
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+ negative:=true;
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+ gotplus:=true;
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+ end;
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+
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+ AS_PLUS :
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+ begin
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+ consume(AS_PLUS);
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+ negative:=false;
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+ gotplus:=true;
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+ end;
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+
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+ AS_INTNUM,
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+ AS_MOD:
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+ Begin
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+ if not gotplus then
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+ Message(asmr_e_invalid_reference_syntax);
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+ l:=BuildConstExpression(True,False);
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+ if negative then
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+ l:=-l;
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+ { Constant memory offset }
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+ oper.InitRef;
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+ oper.opr.ref.refaddr:=addr_full;
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+ oper.opr.ref.offset:=l;
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+ GotPlus:=(prevasmtoken=AS_PLUS) or
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+ (prevasmtoken=AS_MINUS);
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+ if GotPlus then
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+ negative:=(prevasmtoken=AS_MINUS);
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+ end;
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+
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+ AS_LBRACKET,
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+ AS_LPAREN :
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+ begin
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+ { memory reference }
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+ BuildReference(oper);
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+ gotplus:=false;
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+ end;
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+
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+ AS_HI,
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+ AS_LO:
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+ begin
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+ { Low or High part of a constant (or constant
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+ memory location) }
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+ oper.InitRef;
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+ if actasmtoken=AS_LO then
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+ oper.opr.ref.refaddr:=addr_low
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+ else
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+ oper.opr.ref.refaddr:=addr_high;
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+ Consume(actasmtoken);
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+ Consume(AS_LPAREN);
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+ BuildConstSymbolExpression(false, true,false,l,tempstr,tempsymtyp);
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+ if not assigned(oper.opr.ref.symbol) then
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+ oper.opr.ref.symbol:=current_asmdata.RefAsmSymbol(tempstr)
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+ else
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+ Message(asmr_e_cant_have_multiple_relocatable_symbols);
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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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+ Consume(AS_RPAREN);
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+ gotplus:=false;
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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);
|
|
|
+ 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
|
|
|
+ ReadPercent(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;
|
|
|
+ gotplus:=false;
|
|
|
+ end;
|
|
|
+
|
|
|
+
|
|
|
+ AS_REGISTER: { Register, a variable reference or a constant reference }
|
|
|
+ Begin
|
|
|
+ { save the type of register used. }
|
|
|
+ tempreg:=actasmregister;
|
|
|
+ Consume(AS_REGISTER);
|
|
|
+ if (oper.opr.typ in [OPR_REGISTER,OPR_REFERENCE]) and gotplus then
|
|
|
+ begin
|
|
|
+ oper.initref;
|
|
|
+ oper.opr.ref.refaddr:=addr_full;
|
|
|
+ if oper.opr.ref.base<>NR_NO then
|
|
|
+ oper.opr.ref.base:=tempreg
|
|
|
+ else
|
|
|
+ if oper.opr.ref.index<>NR_NO then
|
|
|
+ oper.opr.ref.index:=tempreg
|
|
|
+ else
|
|
|
+ Message(asmr_e_multiple_index);
|
|
|
+ end
|
|
|
+ else
|
|
|
+ begin
|
|
|
+ if (oper.opr.typ<>OPR_NONE) then
|
|
|
+ Message(asmr_e_invalid_operand_type);
|
|
|
+ oper.opr.typ:=OPR_REGISTER;
|
|
|
+ oper.opr.reg:=tempreg;
|
|
|
+ end;
|
|
|
+ gotplus:=false;
|
|
|
+ end;
|
|
|
+
|
|
|
+ AS_END,
|
|
|
+ AS_SEPARATOR,
|
|
|
+ AS_COMMA:
|
|
|
+ break;
|
|
|
+ else
|
|
|
+ Begin
|
|
|
+ Message(asmr_e_syn_operand);
|
|
|
+ Consume(actasmtoken);
|
|
|
+ end;
|
|
|
+ end; { end case }
|
|
|
+ until false;
|
|
|
+ end;
|
|
|
+
|
|
|
+
|
|
|
+{*****************************************************************************
|
|
|
+ TMipsReader
|
|
|
+*****************************************************************************}
|
|
|
+
|
|
|
+ procedure TMipsReader.BuildOpCode(instr : TInstruction);
|
|
|
+ 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 TOperand);
|
|
|
+ end; { end case }
|
|
|
+ until false;
|
|
|
+ if (operandnum=1) and (instr.Operands[operandnum].opr.typ=OPR_NONE) then
|
|
|
+ dec(operandnum);
|
|
|
+ instr.Ops:=operandnum;
|
|
|
+ end;
|
|
|
+
|
|
|
+
|
|
|
+ function TMipsReader.is_asmopcode(const s: string):boolean;
|
|
|
+ var
|
|
|
+ cond:TAsmCond;
|
|
|
+ Begin
|
|
|
+ { making s a value parameter would break other assembler readers }
|
|
|
+ is_asmopcode:=false;
|
|
|
+
|
|
|
+ { clear op code }
|
|
|
+ actopcode:=A_None;
|
|
|
+ { clear condition }
|
|
|
+ fillchar(actcondition,sizeof(actcondition),0);
|
|
|
+
|
|
|
+ { Search opcodes }
|
|
|
+ actopcode:=tasmop(PtrUInt(iasmops.Find(s)));
|
|
|
+ if actopcode<>A_NONE then
|
|
|
+ begin
|
|
|
+ actasmtoken:=AS_OPCODE;
|
|
|
+ result:=TRUE;
|
|
|
+ exit;
|
|
|
+ end;
|
|
|
+
|
|
|
+ { not found, check branch instructions }
|
|
|
+ if (Upcase(s[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 }
|
|
|
+ actopcode := A_B;
|
|
|
+ for cond:=low(TAsmCond) to high(TAsmCond) do
|
|
|
+ if (Upper(copy(s,2,length(s)-1))=Upper(Cond2Str[cond])) then
|
|
|
+ begin
|
|
|
+ actasmtoken:=AS_OPCODE;
|
|
|
+ actcondition:=cond;
|
|
|
+ is_asmopcode:=true;
|
|
|
+ end;
|
|
|
+ end;
|
|
|
+ end;
|
|
|
+
|
|
|
+
|
|
|
+ procedure TMipsReader.ConvertCalljmp(instr : TInstruction);
|
|
|
+ var
|
|
|
+ newopr : toprrec;
|
|
|
+ begin
|
|
|
+ if instr.Operands[1].opr.typ=OPR_REFERENCE then
|
|
|
+ with newopr do
|
|
|
+ begin
|
|
|
+ typ:=OPR_SYMBOL;
|
|
|
+ symbol:=instr.Operands[1].opr.ref.symbol;
|
|
|
+ symofs:=instr.Operands[1].opr.ref.offset;
|
|
|
+ if (instr.Operands[1].opr.ref.base<>NR_NO) or
|
|
|
+ (instr.Operands[1].opr.ref.index<>NR_NO) or
|
|
|
+ (instr.Operands[1].opr.ref.refaddr<>addr_full) then
|
|
|
+ Message(asmr_e_syn_operand);
|
|
|
+ instr.Operands[1].opr:=newopr;
|
|
|
+ end;
|
|
|
+ end;
|
|
|
+
|
|
|
+
|
|
|
+ procedure TMipsReader.handleopcode;
|
|
|
+ var
|
|
|
+ instr : TInstruction;
|
|
|
+ begin
|
|
|
+ instr:=TInstruction.Create(TOperand);
|
|
|
+ BuildOpcode(instr);
|
|
|
+ with instr do
|
|
|
+ begin
|
|
|
+ condition := actcondition;
|
|
|
+ if is_calljmp(opcode) then
|
|
|
+ ConvertCalljmp(instr);
|
|
|
+ ConcatInstruction(curlist);
|
|
|
+ Free;
|
|
|
+ end;
|
|
|
+ end;
|
|
|
+
|
|
|
+
|
|
|
+{*****************************************************************************
|
|
|
+ Initialize
|
|
|
+*****************************************************************************}
|
|
|
+
|
|
|
+const
|
|
|
+ asmmode_mips_att_info : tasmmodeinfo =
|
|
|
+ (
|
|
|
+ id : asmmode_standard;
|
|
|
+ idtxt : 'GAS';
|
|
|
+ casmreader : TMipsReader;
|
|
|
+ );
|
|
|
+
|
|
|
+initialization
|
|
|
+ RegisterAsmMode(asmmode_mips_att_info);
|
|
|
+end.
|
pierre