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620 lines
24 KiB
ObjectPascal
620 lines
24 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1996,97 by Florian Klaempfl
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This unit implements an asmoutput class for Intel syntax with Intel i386+
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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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unit ag386int;
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interface
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uses aasm,assemble;
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type
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pi386intasmlist=^ti386intasmlist;
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ti386intasmlist = object(tasmlist)
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procedure WriteTree(p:paasmoutput);virtual;
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procedure WriteAsmList;virtual;
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end;
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implementation
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uses
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dos,globals,systems,cobjects,i386,
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strings,files,verbose
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{$ifdef GDB}
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,gdb
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{$endif GDB}
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;
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const
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line_length = 70;
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extstr : array[EXT_NEAR..EXT_ABS] of String[8] =
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('NEAR','FAR','PROC','BYTE','WORD','DWORD',
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'CODEPTR','DATAPTR','FWORD','PWORD','QWORD','TBYTE','ABS');
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function double2str(d : double) : string;
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var
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hs : string;
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p : byte;
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begin
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str(d,hs);
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{ nasm expects a lowercase e }
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p:=pos('E',hs);
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if p>0 then
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hs[p]:='e';
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p:=pos('+',hs);
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if p>0 then
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delete(hs,p,1);
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double2str:=lower(hs);
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end;
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function comp2str(d : bestreal) : string;
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type
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pdouble = ^double;
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var
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c : comp;
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dd : pdouble;
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begin
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{$ifdef TP}
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c:=d;
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{$else}
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c:=comp(d);
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{$endif}
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dd:=pdouble(@c); { this makes a bitwise copy of c into a double }
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comp2str:=double2str(dd^);
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end;
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function getreferencestring(const ref : treference) : string;
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var
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s : string;
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first : boolean;
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begin
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if ref.isintvalue then
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s:= tostr(ref.offset)
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else
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with ref do
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begin
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first:=true;
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if ref.segment<>R_DEFAULT_SEG then
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s:=int_reg2str[segment]+':['
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else
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s:='[';
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if assigned(symbol) then
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begin
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s:=s+symbol^;
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first:=false;
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end;
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if (base<>R_NO) then
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begin
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if not(first) then
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s:=s+'+'
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else
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first:=false;
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s:=s+int_reg2str[base];
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end;
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if (index<>R_NO) then
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begin
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if not(first) then
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s:=s+'+'
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else
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first:=false;
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s:=s+int_reg2str[index];
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if scalefactor<>0 then
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s:=s+'*'+tostr(scalefactor);
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end;
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if offset<0 then
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s:=s+tostr(offset)
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else if (offset>0) then
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s:=s+'+'+tostr(offset);
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s:=s+']';
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end;
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getreferencestring:=s;
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end;
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function getopstr(t : byte;o : pointer;s : topsize; _operator: tasmop;dest : boolean) : string;
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var
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hs : string;
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begin
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case t of
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top_reg : getopstr:=int_reg2str[tregister(o)];
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top_const,
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top_ref : begin
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if t=top_const then
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hs := tostr(longint(o))
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else
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hs:=getreferencestring(preference(o)^);
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{ can possibly give a range check error under tp }
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{ if using in... }
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if ((_operator <> A_LGS) and (_operator <> A_LSS) and
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(_operator <> A_LFS) and (_operator <> A_LDS) and
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(_operator <> A_LES)) then
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Begin
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case s of
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S_B : hs:='byte ptr '+hs;
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S_W : hs:='word ptr '+hs;
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S_L : hs:='dword ptr '+hs;
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S_IS : hs:='word ptr '+hs;
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S_IL : hs:='dword ptr '+hs;
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S_IQ : hs:='qword ptr '+hs;
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S_FS : hs:='dword ptr '+hs;
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S_FL : hs:='qword ptr '+hs;
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S_FX : hs:='tbyte ptr '+hs;
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S_BW : if dest then
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hs:='word ptr '+hs
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else
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hs:='byte ptr '+hs;
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S_BL : if dest then
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hs:='dword ptr '+hs
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else
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hs:='byte ptr '+hs;
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S_WL : if dest then
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hs:='dword ptr '+hs
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else
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hs:='word ptr '+hs;
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end;
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end;
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getopstr:=hs;
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end;
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top_symbol : begin
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hs[0]:=chr(strlen(pchar(pcsymbol(o)^.symbol)));
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move(pchar(pcsymbol(o)^.symbol)^,hs[1],byte(hs[0]));
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hs:='offset '+hs;
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if pcsymbol(o)^.offset>0 then
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hs:=hs+'+'+tostr(pcsymbol(o)^.offset)
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else
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if pcsymbol(o)^.offset<0 then
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hs:=hs+tostr(pcsymbol(o)^.offset);
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getopstr:=hs;
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end;
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else
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internalerror(10001);
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end;
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end;
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function getopstr_jmp(t : byte;o : pointer) : string;
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var
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hs : string;
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begin
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case t of
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top_reg : getopstr_jmp:=int_reg2str[tregister(o)];
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top_ref : getopstr_jmp:=getreferencestring(preference(o)^);
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top_const : getopstr_jmp:=tostr(longint(o));
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top_symbol : begin
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hs[0]:=chr(strlen(pchar(pcsymbol(o)^.symbol)));
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move(pchar(pcsymbol(o)^.symbol)^,hs[1],byte(hs[0]));
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if pcsymbol(o)^.offset>0 then
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hs:=hs+'+'+tostr(pcsymbol(o)^.offset)
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else
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if pcsymbol(o)^.offset<0 then
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hs:=hs+tostr(pcsymbol(o)^.offset);
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getopstr_jmp:=hs;
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end;
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else
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internalerror(10001);
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end;
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end;
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{****************************************************************************
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TI386INTASMLIST
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****************************************************************************}
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var
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LastSec : tsection;
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const
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ait_const2str:array[ait_const_32bit..ait_const_8bit] of string[8]=
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(#9'DD'#9,'',#9'DW'#9,#9'DB'#9);
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ait_section2masmstr : array[tsection] of string[6]=
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('','CODE','DATA','BSS','');
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Function PadTabs(p:pchar;addch:char):string;
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var
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s : string;
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i : longint;
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begin
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i:=strlen(p);
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if addch<>#0 then
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begin
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inc(i);
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s:=StrPas(p)+addch;
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end
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else
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s:=StrPas(p);
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if i<8 then
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PadTabs:=s+#9#9
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else
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PadTabs:=s+#9;
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end;
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procedure ti386intasmlist.WriteTree(p:paasmoutput);
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type
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twowords=record
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word1,word2:word;
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end;
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var
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s,
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prefix,
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suffix : string;
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hp : pai;
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counter,
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lines,
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i,j,l : longint;
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consttyp : tait;
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found,
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quoted : boolean;
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begin
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if not assigned(p) then
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exit;
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hp:=pai(p^.first);
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while assigned(hp) do
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begin
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case hp^.typ of
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ait_comment : Begin
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AsmWrite(target_asm.comment);
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AsmWritePChar(pai_asm_comment(hp)^.str);
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AsmLn;
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End;
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ait_section : begin
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if LastSec<>sec_none then
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AsmWriteLn('_'+ait_section2masmstr[LastSec]+#9#9'ENDS');
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if pai_section(hp)^.sec<>sec_none then
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begin
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AsmLn;
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AsmWriteLn('_'+ait_section2masmstr[pai_section(hp)^.sec]+#9#9+
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'SEGMENT'#9'PARA PUBLIC USE32 '''+
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ait_section2masmstr[pai_section(hp)^.sec]+'''');
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end;
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LastSec:=pai_section(hp)^.sec;
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end;
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ait_align : begin
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{ CAUSES PROBLEMS WITH THE SEGMENT DEFINITION }
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{ SEGMENT DEFINITION SHOULD MATCH TYPE OF ALIGN }
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{ HERE UNDER TASM! }
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AsmWriteLn(#9'ALIGN '+tostr(pai_align(hp)^.aligntype));
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end;
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ait_external : AsmWriteLn(#9'EXTRN'#9+StrPas(pai_external(hp)^.name)+
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' :'+extstr[pai_external(hp)^.exttyp]);
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ait_datablock : begin
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if pai_datablock(hp)^.is_global then
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AsmWriteLn(#9'PUBLIC'#9+StrPas(pai_datablock(hp)^.name));
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AsmWriteLn(PadTabs(pai_datablock(hp)^.name,#0)+'DB'#9+tostr(pai_datablock(hp)^.size)+' DUP(?)');
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end;
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ait_const_32bit,
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ait_const_8bit,
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ait_const_16bit : begin
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AsmWrite(ait_const2str[hp^.typ]+tostr(pai_const(hp)^.value));
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consttyp:=hp^.typ;
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l:=0;
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repeat
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found:=(not (Pai(hp^.next)=nil)) and (Pai(hp^.next)^.typ=consttyp);
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if found then
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begin
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hp:=Pai(hp^.next);
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s:=','+tostr(pai_const(hp)^.value);
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AsmWrite(s);
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inc(l,length(s));
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end;
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until (not found) or (l>line_length);
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AsmLn;
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end;
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ait_const_symbol : begin
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AsmWrite(#9#9+'DD '#9'offset ');
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AsmWritePChar(pchar(pai_const(hp)^.value));
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AsmLn;
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end;
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ait_real_32bit : AsmWriteLn(#9#9'DD'#9+double2str(pai_single(hp)^.value));
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ait_real_64bit : AsmWriteLn(#9#9'DQ'#9+double2str(pai_double(hp)^.value));
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ait_real_extended : AsmWriteLn(#9#9'DT'#9+double2str(pai_extended(hp)^.value));
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ait_comp : AsmWriteLn(#9#9'DQ'#9+comp2str(pai_extended(hp)^.value));
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ait_string : begin
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counter := 0;
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lines := pai_string(hp)^.len div line_length;
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{ separate lines in different parts }
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if pai_string(hp)^.len > 0 then
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Begin
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for j := 0 to lines-1 do
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begin
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AsmWrite(#9#9'DB'#9);
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quoted:=false;
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for i:=counter to counter+line_length do
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begin
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{ it is an ascii character. }
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if (ord(pai_string(hp)^.str[i])>31) and
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(ord(pai_string(hp)^.str[i])<128) and
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(pai_string(hp)^.str[i]<>'"') then
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begin
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if not(quoted) then
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begin
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if i>counter then
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AsmWrite(',');
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AsmWrite('"');
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end;
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AsmWrite(pai_string(hp)^.str[i]);
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quoted:=true;
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end { if > 31 and < 128 and ord('"') }
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else
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begin
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if quoted then
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AsmWrite('"');
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if i>counter then
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AsmWrite(',');
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quoted:=false;
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AsmWrite(tostr(ord(pai_string(hp)^.str[i])));
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end;
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end; { end for i:=0 to... }
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if quoted then AsmWrite('"');
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AsmWrite(target_os.newline);
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counter := counter+line_length;
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end; { end for j:=0 ... }
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{ do last line of lines }
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AsmWrite(#9#9'DB'#9);
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quoted:=false;
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for i:=counter to pai_string(hp)^.len-1 do
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begin
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{ it is an ascii character. }
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if (ord(pai_string(hp)^.str[i])>31) and
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(ord(pai_string(hp)^.str[i])<128) and
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(pai_string(hp)^.str[i]<>'"') then
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begin
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if not(quoted) then
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begin
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if i>counter then
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AsmWrite(',');
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AsmWrite('"');
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end;
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AsmWrite(pai_string(hp)^.str[i]);
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quoted:=true;
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end { if > 31 and < 128 and " }
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else
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begin
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if quoted then
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AsmWrite('"');
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if i>counter then
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AsmWrite(',');
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quoted:=false;
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AsmWrite(tostr(ord(pai_string(hp)^.str[i])));
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end;
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end; { end for i:=0 to... }
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if quoted then
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AsmWrite('"');
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end;
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AsmLn;
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end;
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ait_label : begin
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if pai_label(hp)^.l^.is_used then
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begin
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AsmWrite(lab2str(pai_label(hp)^.l));
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if (assigned(hp^.next) and not(pai(hp^.next)^.typ in
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[ait_const_32bit,ait_const_16bit,ait_const_8bit,ait_const_symbol,
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ait_real_32bit,ait_real_64bit,ait_real_extended,ait_string])) then
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AsmWriteLn(':');
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end;
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end;
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ait_direct : begin
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AsmWritePChar(pai_direct(hp)^.str);
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AsmLn;
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end;
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ait_labeled_instruction : AsmWriteLn(#9#9+int_op2str[pai_labeled(hp)^._operator]+#9+lab2str(pai_labeled(hp)^.lab));
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ait_symbol : begin
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if pai_symbol(hp)^.is_global then
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AsmWriteLn(#9'PUBLIC'#9+StrPas(pai_symbol(hp)^.name));
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AsmWritePChar(pai_symbol(hp)^.name);
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if assigned(hp^.next) and not(pai(hp^.next)^.typ in
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[ait_const_32bit,ait_const_16bit,ait_const_8bit,ait_const_symbol,
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ait_real_64bit,ait_real_extended,ait_string]) then
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AsmWriteLn(':')
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end;
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ait_instruction : begin
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suffix:='';
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prefix:= '';
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{ added prefix instructions, must be on same line as opcode }
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if (pai386(hp)^.op1t = top_none) and
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((pai386(hp)^._operator = A_REP) or
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(pai386(hp)^._operator = A_LOCK) or
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(pai386(hp)^._operator = A_REPE) or
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(pai386(hp)^._operator = A_REPNE)) then
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Begin
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prefix:=int_op2str[pai386(hp)^._operator]+#9;
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hp:=Pai(hp^.next);
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{ this is theorically impossible... }
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if hp=nil then
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begin
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s:=#9#9+prefix;
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AsmWriteLn(s);
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break;
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end;
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end
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else
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prefix:= '';
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if pai386(hp)^.op1t<>top_none then
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begin
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if pai386(hp)^._operator in [A_CALL] then
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begin
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{ with tasm call near ptr [edi+12] does not
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work but call near [edi+12] works ?? (PM)
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It works with call dword ptr [], but you
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need /m2 (2 passes) with tasm (PFV)
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}
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{ if pai386(hp)^.op1t=top_ref then
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s:='near '+getopstr_jmp(pai386(hp)^.op1t,pai386(hp)^.op1)
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else
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s:='near ptr '+getopstr_jmp(pai386(hp)^.op1t,pai386(hp)^.op1);}
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s:='dword ptr '+getopstr_jmp(pai386(hp)^.op1t,pai386(hp)^.op1);
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end
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else
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begin
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s:=getopstr(pai386(hp)^.op1t,pai386(hp)^.op1,pai386(hp)^.size,pai386(hp)^._operator,false);
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if pai386(hp)^.op3t<>top_none then
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begin
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if pai386(hp)^.op2t<>top_none then
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s:=getopstr(pai386(hp)^.op2t,pointer(longint(twowords(pai386(hp)^.op2).word1)),
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pai386(hp)^.size,pai386(hp)^._operator,true)+','+s;
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s:=getopstr(pai386(hp)^.op3t,pointer(longint(twowords(pai386(hp)^.op2).word2)),
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pai386(hp)^.size,pai386(hp)^._operator,false)+','+s;
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end
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else
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if pai386(hp)^.op2t<>top_none then
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s:=getopstr(pai386(hp)^.op2t,pai386(hp)^.op2,pai386(hp)^.size,
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pai386(hp)^._operator,true)+','+s;
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end;
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s:=#9+s;
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end
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else
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begin
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{ check if string instruction }
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{ long form, otherwise may give range check errors }
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{ in turbo pascal... }
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if ((pai386(hp)^._operator = A_CMPS) or
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(pai386(hp)^._operator = A_INS) or
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(pai386(hp)^._operator = A_OUTS) or
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(pai386(hp)^._operator = A_SCAS) or
|
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(pai386(hp)^._operator = A_STOS) or
|
|
(pai386(hp)^._operator = A_MOVS) or
|
|
(pai386(hp)^._operator = A_LODS) or
|
|
(pai386(hp)^._operator = A_XLAT)) then
|
|
Begin
|
|
case pai386(hp)^.size of
|
|
S_B: suffix:='b';
|
|
S_W: suffix:='w';
|
|
S_L: suffix:='d';
|
|
else
|
|
Message(assem_f_invalid_suffix_intel);
|
|
end;
|
|
end;
|
|
s:='';
|
|
end;
|
|
AsmWriteLn(#9#9+prefix+int_op2str[pai386(hp)^._operator]+suffix+s);
|
|
end;
|
|
{$ifdef GDB}
|
|
ait_stabn,
|
|
ait_stabs,
|
|
ait_stab_function_name : ;
|
|
{$endif GDB}
|
|
else
|
|
internalerror(10000);
|
|
end;
|
|
hp:=pai(hp^.next);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure ti386intasmlist.WriteAsmList;
|
|
|
|
begin
|
|
{$ifdef EXTDEBUG}
|
|
if assigned(current_module^.mainsource) then
|
|
comment(v_info,'Start writing intel-styled assembler output for '+current_module^.mainsource^);
|
|
{$endif}
|
|
LastSec:=sec_none;
|
|
AsmWriteLn(#9'.386p');
|
|
AsmWriteLn(#9'LOCALS '+target_asm.labelprefix);
|
|
AsmWriteLn('DGROUP'#9'GROUP'#9'_BSS,_DATA');
|
|
AsmWriteLn(#9'ASSUME'#9'CS:_CODE,ES:DGROUP,DS:DGROUP,SS:DGROUP');
|
|
AsmLn;
|
|
|
|
WriteTree(externals);
|
|
{ INTEL ASM doesn't support stabs
|
|
WriteTree(debuglist);}
|
|
|
|
WriteTree(codesegment);
|
|
WriteTree(datasegment);
|
|
WriteTree(consts);
|
|
WriteTree(rttilist);
|
|
WriteTree(bsssegment);
|
|
|
|
AsmWriteLn(#9'END');
|
|
AsmLn;
|
|
|
|
{$ifdef EXTDEBUG}
|
|
if assigned(current_module^.mainsource) then
|
|
comment(v_info,'Done writing intel-styled assembler output for '+current_module^.mainsource^);
|
|
{$endif EXTDEBUG}
|
|
end;
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.11 1998-06-05 17:46:02 peter
|
|
* tp doesn't like comp() typecast
|
|
|
|
Revision 1.10 1998/05/25 17:11:36 pierre
|
|
* firstpasscount bug fixed
|
|
now all is already set correctly the first time
|
|
under EXTDEBUG try -gp to skip all other firstpasses
|
|
it works !!
|
|
* small bug fixes
|
|
- for smallsets with -dTESTSMALLSET
|
|
- some warnings removed (by correcting code !)
|
|
|
|
Revision 1.9 1998/05/23 01:20:55 peter
|
|
+ aktasmmode, aktoptprocessor, aktoutputformat
|
|
+ smartlink per module $SMARTLINK-/+ (like MMX) and moved to aktswitches
|
|
+ $LIBNAME to set the library name where the unit will be put in
|
|
* splitted cgi386 a bit (codeseg to large for bp7)
|
|
* nasm, tasm works again. nasm moved to ag386nsm.pas
|
|
|
|
Revision 1.8 1998/05/06 18:36:53 peter
|
|
* tai_section extended with code,data,bss sections and enumerated type
|
|
* ident 'compiled by FPC' moved to pmodules
|
|
* small fix for smartlink
|
|
|
|
Revision 1.7 1998/05/06 08:38:32 pierre
|
|
* better position info with UseTokenInfo
|
|
UseTokenInfo greatly simplified
|
|
+ added check for changed tree after first time firstpass
|
|
(if we could remove all the cases were it happen
|
|
we could skip all firstpass if firstpasscount > 1)
|
|
Only with ExtDebug
|
|
|
|
Revision 1.6 1998/05/04 17:54:24 peter
|
|
+ smartlinking works (only case jumptable left todo)
|
|
* redesign of systems.pas to support assemblers and linkers
|
|
+ Unitname is now also in the PPU-file, increased version to 14
|
|
|
|
Revision 1.5 1998/05/01 07:43:52 florian
|
|
+ basics for rtti implemented
|
|
+ switch $m (generate rtti for published sections)
|
|
|
|
Revision 1.4 1998/04/29 10:33:41 pierre
|
|
+ added some code for ansistring (not complete nor working yet)
|
|
* corrected operator overloading
|
|
* corrected nasm output
|
|
+ started inline procedures
|
|
+ added starstarn : use ** for exponentiation (^ gave problems)
|
|
+ started UseTokenInfo cond to get accurate positions
|
|
|
|
Revision 1.3 1998/04/08 16:58:01 pierre
|
|
* several bugfixes
|
|
ADD ADC and AND are also sign extended
|
|
nasm output OK (program still crashes at end
|
|
and creates wrong assembler files !!)
|
|
procsym types sym in tdef removed !!
|
|
|
|
Revision 1.2 1998/04/08 11:34:17 peter
|
|
* nasm works (linux only tested)
|
|
}
|