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350 lines
16 KiB
ObjectPascal
350 lines
16 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2002 by Florian Klaempfl
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Reads inline Powerpc assembler and writes the lines direct to the output
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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{
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This unit reads ARM inline assembler and writes the lines direct to the output file.
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}
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unit radirect;
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{$i fpcdefs.inc}
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interface
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uses
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node;
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function assemble : tnode;
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implementation
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uses
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{ common }
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cutils,
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{ global }
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globals,verbose,
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systems,
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{ aasm }
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aasmbase,aasmtai,aasmcpu,
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{ symtable }
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symconst,symbase,symtype,symsym,symtable,defutil,
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{ pass 1 }
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nbas,
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{ parser }
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scanner,
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{ codegen }
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cgbase,procinfo,
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{ constants }
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itarmgas,
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cpubase
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;
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function is_register(const s:string):boolean;
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begin
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is_register:=false;
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if gas_regnum_search(lower(s))<>NR_NO then
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is_register:=true;
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end;
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function assemble : tnode;
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var
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retstr,s,hs : string;
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c : char;
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ende : boolean;
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srsym,sym : tsym;
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srsymtable : tsymtable;
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code : TAAsmoutput;
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framereg : tregister;
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i,l : longint;
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procedure writeasmline;
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var
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i : longint;
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begin
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i:=length(s);
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while (i>0) and (s[i] in [' ',#9]) do
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dec(i);
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s[0]:=chr(i);
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if s<>'' then
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code.concat(Tai_direct.Create(strpnew(s)));
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{ consider it set function set if the offset was loaded }
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if assigned(current_procinfo.procdef.funcretsym) and
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(pos(retstr,upper(s))>0) then
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tvarsym(current_procinfo.procdef.funcretsym).varstate:=vs_assigned;
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s:='';
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end;
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begin
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ende:=false;
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framereg:=NR_FRAME_POINTER_REG;
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s:='';
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if assigned(current_procinfo.procdef.funcretsym) and
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is_fpu(current_procinfo.procdef.rettype.def) then
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tvarsym(current_procinfo.procdef.funcretsym).varstate:=vs_assigned;
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{ !!!!!
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if (not is_void(current_procinfo.procdef.rettype.def)) then
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retstr:=upper(tostr(tvarsym(current_procinfo.procdef.funcretsym).adjusted_address)+'('+gas_reg2str[procinfo^.framepointer]+')')
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else
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}
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retstr:='';
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c:=current_scanner.asmgetchar;
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code:=TAAsmoutput.Create;
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while not(ende) do
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begin
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{ wrong placement
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current_scanner.gettokenpos; }
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case c of
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'A'..'Z','a'..'z','_':
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begin
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current_scanner.gettokenpos;
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i:=0;
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hs:='';
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while ((ord(c)>=ord('A')) and (ord(c)<=ord('Z')))
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or ((ord(c)>=ord('a')) and (ord(c)<=ord('z')))
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or ((ord(c)>=ord('0')) and (ord(c)<=ord('9')))
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or (c='_') do
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begin
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inc(i);
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hs[i]:=c;
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c:=current_scanner.asmgetchar;
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end;
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hs[0]:=chr(i);
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if upper(hs)='END' then
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ende:=true
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else
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begin
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if c=':' then
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begin
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searchsym(upper(hs),srsym,srsymtable);
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if srsym<>nil then
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if (srsym.typ = labelsym) then
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Begin
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hs:=tlabelsym(srsym).lab.name;
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tlabelsym(srsym).lab.is_set:=true;
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end
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else
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Message(asmr_w_using_defined_as_local);
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end
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else
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{ access to local variables }
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if assigned(current_procinfo.procdef) then
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begin
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{ I don't know yet, what the ppc port requires }
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{ we'll see how things settle down }
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{ is the last written character an special }
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{ char ? }
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{ !!!
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if (s[length(s)]='%') and
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ret_in_acc(current_procinfo.procdef.rettype.def) and
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((pos('AX',upper(hs))>0) or
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(pos('AL',upper(hs))>0)) then
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tfuncretsym(current_procinfo.procdef.funcretsym).funcretstate:=vs_assigned;
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}
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if ((s[length(s)]<>'0') or (hs[1]<>'x')) and not(is_register(hs)) then
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begin
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if assigned(current_procinfo.procdef.localst) and
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(current_procinfo.procdef.localst.symtablelevel >= normal_function_level) then
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sym:=tsym(current_procinfo.procdef.localst.search(upper(hs)))
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else
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sym:=nil;
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if assigned(sym) then
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begin
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if (sym.typ=labelsym) then
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Begin
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hs:=tlabelsym(sym).lab.name;
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end
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else if sym.typ=varsym then
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begin
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if (vo_is_external in tvarsym(sym).varoptions) then
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hs:=tvarsym(sym).mangledname
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else
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begin
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if (tvarsym(sym).localloc.loc=LOC_REGISTER) then
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hs:=gas_regname(tvarsym(sym).localloc.register)
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else
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hs:='%%'+tvarsym(sym).name;
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end;
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end
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else
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{ call to local function }
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if (sym.typ=procsym) and (pos('BL',upper(s))>0) then
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hs:=tprocsym(sym).first_procdef.mangledname;
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end
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else
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begin
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if assigned(current_procinfo.procdef.parast) then
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sym:=tsym(current_procinfo.procdef.parast.search(upper(hs)))
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else
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sym:=nil;
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if assigned(sym) then
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begin
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if sym.typ=varsym then
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begin
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hs:='%%'+tvarsym(sym).name;
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if pos(',',s) > 0 then
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tvarsym(sym).varstate:=vs_used;
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end;
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end
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{ I added that but it creates a problem in line.ppi
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because there is a local label wbuffer and
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a static variable WBUFFER ...
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what would you decide, florian ?}
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else
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begin
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searchsym(upper(hs),sym,srsymtable);
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if assigned(sym) and (sym.owner.symtabletype in [globalsymtable,staticsymtable]) then
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begin
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case sym.typ of
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constsym :
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begin
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inc(tconstsym(sym).refs);
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case tconstsym(sym).consttyp of
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constint,constchar,constbool :
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hs:=tostr(tconstsym(sym).value.valueord);
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constpointer :
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hs:=tostr(tconstsym(sym).value.valueordptr);
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else
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Message(asmr_e_wrong_sym_type);
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end;
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end;
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varsym :
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begin
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Message2(asmr_h_direct_global_to_mangled,hs,tvarsym(sym).mangledname);
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hs:=tvarsym(sym).mangledname;
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inc(tvarsym(sym).refs);
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end;
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typedconstsym :
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begin
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Message2(asmr_h_direct_global_to_mangled,hs,ttypedconstsym(sym).mangledname);
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hs:=ttypedconstsym(sym).mangledname;
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end;
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procsym :
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begin
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{ procs can be called or the address can be loaded }
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if (pos('BL',upper(s))>0) {or (pos('LEA',upper(s))>0))} then
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begin
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if Tprocsym(sym).procdef_count>1 then
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Message1(asmr_w_direct_global_is_overloaded_func,hs);
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Message2(asmr_h_direct_global_to_mangled,hs,tprocsym(sym).first_procdef.mangledname);
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hs:=tprocsym(sym).first_procdef.mangledname;
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end;
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end;
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else
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Message(asmr_e_wrong_sym_type);
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end;
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end
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{$ifdef dummy}
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else if upper(hs)='__SELF' then
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begin
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if assigned(procinfo^._class) then
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hs:=tostr(procinfo^.selfpointer_offset)+
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'('+gas_reg2str[procinfo^.framepointer]+')'
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else
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Message(asmr_e_cannot_use_SELF_outside_a_method);
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end
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else if upper(hs)='__RESULT' then
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begin
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if (not is_void(current_procinfo.procdef.rettype.def)) then
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hs:=retstr
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else
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Message(asmr_e_void_function);
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end
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{ implement old stack/frame pointer access for nested procedures }
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{!!!!
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else if upper(hs)='__OLDSP' then
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begin
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{ complicate to check there }
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{ we do it: }
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if lexlevel>normal_function_level then
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hs:=tostr(procinfo^.framepointer_offset)+
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'('+gas_reg2str[procinfo^.framepointer]+')'
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else
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Message(asmr_e_cannot_use_OLDEBP_outside_nested_procedure);
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end;
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}
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end;
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{$endif dummy}
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end;
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end;
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end;
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end;
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s:=s+hs;
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end;
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end;
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';',#10,#13:
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begin
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if pos(retstr,s) > 0 then
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tvarsym(current_procinfo.procdef.funcretsym).varstate:=vs_assigned;
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writeasmline;
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c:=current_scanner.asmgetchar;
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end;
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#26:
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Message(scan_f_end_of_file);
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else
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begin
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current_scanner.gettokenpos;
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inc(byte(s[0]));
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s[length(s)]:=c;
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c:=current_scanner.asmgetchar;
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end;
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end;
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end;
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writeasmline;
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assemble:=casmnode.create(code);
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end;
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{*****************************************************************************
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Initialize
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*****************************************************************************}
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const
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asmmode_arm_direct_info : tasmmodeinfo =
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(
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id : asmmode_direct;
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idtxt : 'DIRECT'
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);
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initialization
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RegisterAsmMode(asmmode_arm_direct_info);
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end.
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{
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$Log$
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Revision 1.5 2003-11-02 14:30:03 florian
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* fixed ARM for new reg. allocation scheme
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Revision 1.4 2003/09/04 00:15:29 florian
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* first bunch of adaptions of arm compiler for new register type
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Revision 1.3 2003/09/01 15:11:17 florian
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* fixed reference handling
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* fixed operand postfix for floating point instructions
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* fixed wrong shifter constant handling
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Revision 1.2 2003/08/16 13:23:01 florian
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* several arm related stuff fixed
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Revision 1.1 2003/07/21 16:35:30 florian
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* very basic stuff for the arm
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}
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