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-{
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- $Id$
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- Copyright (c) 1998-2002 by Florian Klaempfl
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-
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- Reads inline Powerpc assembler and writes the lines direct to the output
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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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-{
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- This unit reads PowerPC inline assembler and writes the lines direct to the output file.
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-}
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-unit rappcdir;
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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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- node;
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-
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- function assemble : tnode;
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-
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- implementation
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-
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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,defbase,
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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,
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- { constants }
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- agppcgas
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- ;
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-
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- function assemble : tnode;
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-
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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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- i,l : longint;
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-
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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(aktprocdef.funcretsym) and
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- (pos(retstr,upper(s))>0) then
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- tfuncretsym(aktprocdef.funcretsym).funcretstate:=vs_assigned;
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- s:='';
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- end;
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-
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- begin
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- ende:=false;
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- s:='';
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- if assigned(aktprocdef.funcretsym) and
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- is_fpu(aktprocdef.rettype.def) then
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- tfuncretsym(aktprocdef.funcretsym).funcretstate:=vs_assigned;
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- { !!!!!
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- if (not is_void(aktprocdef.rettype.def)) then
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- retstr:=upper(tostr(procinfo^.return_offset)+'('+gas_reg2str[procinfo^.framepointer]+')')
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- else
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- }
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- retstr:='';
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-
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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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-{$ifdef dummy}
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- else
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- { access to local variables }
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- if assigned(aktprocdef) 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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-
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- { is the last written character an special }
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- { char ? }
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- if (s[length(s)]='%') and
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- ret_in_acc(aktprocdef.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(aktprocdef.funcretsym).funcretstate:=vs_assigned;
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- if (s[length(s)]<>'%') and
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- (s[length(s)]<>'$') and
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- ((s[length(s)]<>'0') or (hs[1]<>'x')) then
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- begin
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- if assigned(aktprocdef.localst) and
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- (lexlevel >= normal_function_level) then
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- sym:=tsym(aktprocdef.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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- {variables set are after a comma }
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- {like in movl %eax,I }
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- if pos(',',s) > 0 then
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- tvarsym(sym).varstate:=vs_used
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- else
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- if (pos('MOV',upper(s)) > 0) and (tvarsym(sym).varstate=vs_declared) then
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- Message1(sym_n_uninitialized_local_variable,hs);
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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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- hs:='-'+tostr(tvarsym(sym).address)+
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- '('+gas_reg2str[procinfo^.framepointer]+')';
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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('CALL',upper(s))>0) or
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- (pos('LEA',upper(s))>0)) then
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- begin
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- hs:=tprocsym(sym).defs^.def.mangledname;
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- end;
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- end
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- else
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- begin
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- if assigned(aktprocdef.parast) then
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- sym:=tsym(aktprocdef.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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- l:=tvarsym(sym).address;
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- { set offset }
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- inc(l,aktprocdef.parast.address_fixup);
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- hs:=tostr(l)+'('+gas_reg2str[procinfo^.framepointer]+')';
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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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- 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('CALL',upper(s))>0) or (pos('LEA',upper(s))>0)) then
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- begin
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- if assigned(tprocsym(sym).defs^.def) 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).defs^.def.mangledname);
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- hs:=tprocsym(sym).defs^.def.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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- 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(aktprocdef.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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- end;
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- end;
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- end;
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-{$endif dummy}
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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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- tfuncretsym(aktprocdef.funcretsym).funcretstate:=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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-{*****************************************************************************
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- Initialize
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-*****************************************************************************}
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-
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-const
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- asmmode_ppc_direct_info : tasmmodeinfo =
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- (
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- id : asmmode_ppc_direct;
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- idtxt : 'DIRECT'
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- );
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-
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-initialization
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- RegisterAsmMode(asmmode_ppc_direct_info);
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-
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-end.
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-{
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- $Log$
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- Revision 1.2 2002-07-28 20:45:23 florian
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- + added direct assembler reader for PowerPC
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-
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- Revision 1.1 2002/07/11 14:41:34 florian
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- * start of the new generic parameter handling
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-}
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carl