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651 lines
25 KiB
ObjectPascal
651 lines
25 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998 by the FPC development team
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This unit implements an asmoutput class for MIT syntax with
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Motorola 68000 (for MIT syntax TEST WITH GAS v1.34)
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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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What's to do:
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o Verify if this actually work as indirect mode with name of variables
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o write lines numbers and file names to output file
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o generate debugging informations
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}
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unit ag68kmit;
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interface
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uses aasm,assemble;
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type
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pm68kmitasmlist=^tm68kmitasmlist;
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tm68kmitasmlist = 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,m68k,
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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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{$ifdef GDB}
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var
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infile : pextfile;
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includecount,
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lastline : longint;
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{$endif GDB}
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function double2str(d : double) : string;
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var
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hs : string;
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begin
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str(d,hs);
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{ replace space with + }
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if hs[1]=' ' then
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hs[1]:='+';
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double2str:=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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begin
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s:='';
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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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{ symbol and offset }
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if (assigned(symbol)) and (offset<>0) then
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Begin
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s:=s+'('+tostr(offset)+symbol^;
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end
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else
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{ symbol only }
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if (assigned(symbol)) and (offset=0) then
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Begin
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s:=s+'('+symbol^;
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end
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else
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{ offset only }
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if (symbol=nil) and (offset<>0) then
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Begin
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s:=s+'('+tostr(offset);
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end
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else
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{ NOTHING - put zero as offset }
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if (symbol=nil) and (offset=0) then
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Begin
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s:=s+'('+'0';
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end
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else
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InternalError(10004);
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if (index<>R_NO) and (base=R_NO) and (direction=dir_none) then
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InternalError(10004)
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else if (index=R_NO) and (base<>R_NO) and (direction=dir_inc) then
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begin
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if (scalefactor = 1) or (scalefactor = 0) then
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Begin
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if offset<>0 then
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s:=mit_reg2str[base]+'@+'+s+')'
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else
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s:=mit_reg2str[base]+'@+';
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end
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else
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InternalError(10002);
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end
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else if (index=R_NO) and (base<>R_NO) and (direction=dir_dec) then
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begin
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if (scalefactor = 1) or (scalefactor = 0) then
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Begin
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if offset<>0 then
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s:=mit_reg2str[base]+'@-'+s+')'
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else
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s:=mit_reg2str[base]+'@-';
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end
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else
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InternalError(10003);
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end
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else if (index=R_NO) and (base<>R_NO) and (direction=dir_none) then
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begin
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if (offset=0) and (symbol=nil) then
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s:=mit_reg2str[base]+'@'
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else
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s:=mit_reg2str[base]+'@'+s+')';
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end
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else if (index<>R_NO) and (base<>R_NO) and (direction=dir_none) then
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begin
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s:=mit_reg2str[base]+'@'+s+','+mit_reg2str[index]+':L';
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if (scalefactor = 1) or (scalefactor = 0) then
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s:=s+')'
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else
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s:=s+':'+tostr(scalefactor)+')';
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end
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else
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if assigned(symbol) then
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Begin
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s:=symbol^;
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if offset<>0 then
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s:=s+'+'+tostr(offset);
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end
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{ this must be a physical address }
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else
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s:=s+')';
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{ else if NOT assigned(symbol) then
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InternalError(10004);}
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end; { end with }
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getreferencestring:=s;
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end;
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function getopstr(t : byte;o : pointer) : string;
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var
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hs : string;
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i: tregister;
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begin
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case t of
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top_reg : getopstr:=mit_reg2str[tregister(o)];
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top_ref : getopstr:=getreferencestring(preference(o)^);
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top_reglist: begin
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hs:='';
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for i:=R_NO to R_FPSR do
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begin
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if i in tregisterlist(o^) then
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hs:=hs+mit_reg2str[i]+'/';
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end;
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delete(hs,length(hs),1);
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getopstr := hs;
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end;
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top_const : getopstr:='#'+tostr(longint(o));
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top_symbol :
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{ compare with i386, where a symbol is considered }
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{ a constant. }
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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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{ inc(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 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 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:=mit_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 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 internalerror(10001);
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end;
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end;
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{****************************************************************************
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T68kGASASMOUTPUT
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****************************************************************************}
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var
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{$ifdef GDB}
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n_line : byte; { different types of source lines }
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{$endif}
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lastsec : tsection; { last section type written }
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const
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ait_const2str:array[ait_const_32bit..ait_const_8bit] of string[8]=
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(#9'.long'#9,'',#9'.short'#9,#9'.byte'#9);
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ait_section2str : array[tsection] of string[6]=
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('','.text','.data','.bss','.idata');
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procedure tm68kmitasmlist.WriteTree(p:paasmoutput);
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var
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hp : pai;
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ch : char;
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consttyp : tait;
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s : string;
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pos,l,i : longint;
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found : boolean;
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{$ifdef GDB}
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funcname : pchar;
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linecount : longint;
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{$endif GDB}
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begin
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if not assigned(p) then
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exit;
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{$ifdef GDB}
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funcname:=nil;
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linecount:=1;
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{$endif GDB}
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hp:=pai(p^.first);
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while assigned(hp) do
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begin
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{ write debugger informations }
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{$ifdef GDB}
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if cs_debuginfo in aktswitches then
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begin
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if not (hp^.typ in [ait_external,ait_stabn,ait_stabs,ait_stab_function_name]) then
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begin
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if assigned(hp^.infile) and (pextfile(hp^.infile)<>infile) then
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begin
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infile:=hp^.infile;
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inc(includecount);
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if (hp^.infile^.path^<>'') then
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begin
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AsmWriteLn(#9'.stabs "'+FixPath(hp^.infile^.path^)+'",'+tostr(n_includefile)+
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',0,0,Ltext'+ToStr(IncludeCount));
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end;
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AsmWriteLn(#9'.stabs "'+FixFileName(hp^.infile^.name^+hp^.infile^.ext^)+'",'+tostr(n_includefile)+
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',0,0,Ltext'+ToStr(IncludeCount));
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AsmWriteLn('Ltext'+ToStr(IncludeCount)+':');
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end;
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{ file name must be there before line number ! }
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if (hp^.line<>lastline) and (hp^.line<>0) then
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begin
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if (n_line = n_textline) and assigned(funcname) and
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(target_os.use_function_relative_addresses) then
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begin
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AsmWriteLn(target_asm.labelprefix+'l'+tostr(linecount)+':');
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AsmWriteLn(#9'.stabn '+tostr(n_line)+',0,'+tostr(hp^.line)+','+
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target_asm.labelprefix+'l'+tostr(linecount)+' - '+StrPas(FuncName));
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inc(linecount);
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end
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else
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AsmWriteLn(#9'.stabd'#9+tostr(n_line)+',0,'+tostr(hp^.line));
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lastline:=hp^.line;
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end;
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end;
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end;
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{$endif GDB}
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case hp^.typ of
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ait_external : ; { external is ignored }
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ait_comment : Begin
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AsmWrite(target_asm.comment);
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AsmWritePChar(pai_asm_comment(hp)^.str);
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AsmLn;
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End;
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{$ifdef DREGALLOC}
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ait_regalloc : AsmWriteLn(target_asm.comment+'Register '+att_reg2str[pairegalloc(hp)^.reg]+' allocated');
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ait_regdealloc : AsmWriteLn(target_asm.comment+'Register '+att_reg2str[pairegalloc(hp)^.reg]+' released');
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{$endif DREGALLOC}
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ait_align : AsmWriteLn(#9'.align '+tostr(pai_align(hp)^.aligntype));
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ait_section : begin
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if pai_section(hp)^.sec<>sec_none then
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begin
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AsmLn;
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AsmWrite(ait_section2str[pai_section(hp)^.sec]);
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if pai_section(hp)^.idataidx>0 then
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AsmWrite('$'+tostr(pai_section(hp)^.idataidx));
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AsmLn;
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{$ifdef GDB}
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case pai_section(hp)^.sec of
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sec_code : n_line:=n_textline;
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sec_data : n_line:=n_dataline;
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sec_bss : n_line:=n_bssline;
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end;
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{$endif GDB}
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end;
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LastSec:=pai_section(hp)^.sec;
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end;
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ait_datablock : begin
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{ ------------------------------------------------------- }
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{ ----------- ALIGNMENT FOR ANY NON-BYTE VALUE ---------- }
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{ ------------- REQUIREMENT FOR 680x0 ------------------- }
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{ ------------------------------------------------------- }
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if pai_datablock(hp)^.size <> 1 then
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begin
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if not(cs_littlesize in aktswitches) then
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AsmWriteLn(#9#9'.align 4')
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else
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AsmWriteLn(#9#9'.align 2');
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end;
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if pai_datablock(hp)^.is_global then
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AsmWrite(#9'.comm'#9)
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else
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AsmWrite(#9'.lcomm'#9);
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AsmWriteLn(StrPas(pai_datablock(hp)^.name)+','+tostr(pai_datablock(hp)^.size));
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end;
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ait_const_32bit, { alignment is required for 16/32 bit data! }
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ait_const_16bit: begin
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if not(cs_littlesize in aktswitches) then
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AsmWriteLn(#9#9'.align 4')
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else
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AsmWriteLn(#9#9'.align 2');
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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_8bit : 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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if not(cs_littlesize in aktswitches) then
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AsmWriteLn(#9#9'.align 4')
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else
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AsmWriteLn(#9#9'.align 2');
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AsmWrite(#9'.long'#9);
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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_64bit : Begin
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if not(cs_littlesize in aktswitches) then
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AsmWriteLn(#9#9'.align 4')
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else
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AsmWriteLn(#9#9'.align 2');
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AsmWriteLn(#9'.double'#9+double2str(pai_double(hp)^.value));
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end;
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ait_real_32bit : Begin
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if not(cs_littlesize in aktswitches) then
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AsmWriteLn(#9#9'.align 4')
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else
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AsmWriteLn(#9#9'.align 2');
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AsmWriteLn(#9'.single'#9+double2str(pai_single(hp)^.value));
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end;
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ait_real_extended : Begin
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if not(cs_littlesize in aktswitches) then
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AsmWriteLn(#9#9'.align 4')
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else
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AsmWriteLn(#9#9'.align 2');
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AsmWriteLn(#9'.extend'#9+double2str(pai_extended(hp)^.value));
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{ comp type is difficult to write so use double }
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end;
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ait_comp : Begin
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if not(cs_littlesize in aktswitches) then
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AsmWriteLn(#9#9'.align 4')
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else
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AsmWriteLn(#9#9'.align 2');
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AsmWriteLn(#9'.double'#9+comp2str(pai_extended(hp)^.value));
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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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{$IfDef GDB}
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if strpos(pai_direct(hp)^.str,'.data')<>nil then
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n_line:=n_dataline
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else if strpos(pai_direct(hp)^.str,'.text')<>nil then
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n_line:=n_textline
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else if strpos(pai_direct(hp)^.str,'.bss')<>nil then
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n_line:=n_bssline;
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{$endif GDB}
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end;
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ait_string : begin
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pos:=0;
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for i:=1 to pai_string(hp)^.len do
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begin
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if pos=0 then
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begin
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AsmWrite(#9'.ascii'#9'"');
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pos:=20;
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end;
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ch:=pai_string(hp)^.str[i-1];
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case ch of
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#0, {This can't be done by range, because a bug in FPC}
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#1..#31,
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#128..#255 : s:='\'+tostr(ord(ch) shr 6)+tostr((ord(ch) and 63) shr 3)+tostr(ord(ch) and 7);
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'"' : s:='\"';
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'\' : s:='\\';
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else
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s:=ch;
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end;
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AsmWrite(s);
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inc(pos,length(s));
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if (pos>line_length) or (i=pai_string(hp)^.len) then
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begin
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AsmWriteLn('"');
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pos:=0;
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end;
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end;
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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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AsmWriteLn(lab2str(pai_label(hp)^.l)+':');
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end;
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ait_labeled_instruction : begin
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{ labeled operand }
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if pai_labeled(hp)^._op1 = R_NO then
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AsmWriteLn(#9+mot_op2str[pai_labeled(hp)^._operator]+#9+lab2str(pai_labeled(hp)^.lab))
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else
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{ labeled operand with register }
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AsmWriteLn(#9+mot_op2str[pai_labeled(hp)^._operator]+#9+
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reg2str(pai_labeled(hp)^._op1)+','+lab2str(pai_labeled(hp)^.lab))
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end;
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ait_symbol : begin
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{ ------------------------------------------------------- }
|
|
{ ----------- ALIGNMENT FOR ANY NON-BYTE VALUE ---------- }
|
|
{ ------------- REQUIREMENT FOR 680x0 ------------------- }
|
|
{ ------------------------------------------------------- }
|
|
if assigned(hp^.next) and (pai(hp^.next)^.typ in
|
|
[ait_const_32bit,ait_const_16bit,ait_const_symbol,
|
|
ait_real_64bit,ait_real_32bit,ait_string]) then
|
|
begin
|
|
if not(cs_littlesize in aktswitches) then
|
|
AsmWriteLn(#9#9'.align 4')
|
|
else
|
|
AsmWriteLn(#9#9'.align 2');
|
|
end;
|
|
if pai_symbol(hp)^.is_global then
|
|
AsmWriteLn('.globl '+StrPas(pai_symbol(hp)^.name));
|
|
AsmWriteLn(StrPas(pai_symbol(hp)^.name)+':');
|
|
end;
|
|
ait_instruction : begin
|
|
{ old versions of GAS don't like PEA.L and LEA.L }
|
|
if (pai68k(hp)^._operator in [
|
|
A_LEA,A_PEA,A_ABCD,A_BCHG,A_BCLR,A_BSET,A_BTST,
|
|
A_EXG,A_NBCD,A_SBCD,A_SWAP,A_TAS,A_SCC,A_SCS,
|
|
A_SEQ,A_SGE,A_SGT,A_SHI,A_SLE,A_SLS,A_SLT,A_SMI,
|
|
A_SNE,A_SPL,A_ST,A_SVC,A_SVS,A_SF]) then
|
|
s:=#9+mot_op2str[pai68k(hp)^._operator]
|
|
else
|
|
s:=#9+mot_op2str[pai68k(hp)^._operator]+mit_opsize2str[pai68k(hp)^.size];
|
|
if pai68k(hp)^.op1t<>top_none then
|
|
begin
|
|
{ call and jmp need an extra handling }
|
|
{ this code is only callded if jmp isn't a labeled instruction }
|
|
if pai68k(hp)^._operator in [A_JSR,A_JMP] then
|
|
s:=s+#9+getopstr_jmp(pai68k(hp)^.op1t,pai68k(hp)^.op1)
|
|
else
|
|
if pai68k(hp)^.op1t = top_reglist then
|
|
s:=s+#9+getopstr(pai68k(hp)^.op1t,@(pai68k(hp)^.reglist))
|
|
else
|
|
s:=s+#9+getopstr(pai68k(hp)^.op1t,pai68k(hp)^.op1);
|
|
if pai68k(hp)^.op2t<>top_none then
|
|
begin
|
|
if pai68k(hp)^.op2t = top_reglist then
|
|
s:=s+','+getopstr(pai68k(hp)^.op2t,@pai68k(hp)^.reglist)
|
|
else
|
|
s:=s+','+getopstr(pai68k(hp)^.op2t,pai68k(hp)^.op2);
|
|
{ three operands }
|
|
if pai68k(hp)^.op3t<>top_none then
|
|
begin
|
|
if (pai68k(hp)^._operator = A_DIVSL) or
|
|
(pai68k(hp)^._operator = A_DIVUL) or
|
|
(pai68k(hp)^._operator = A_MULU) or
|
|
(pai68k(hp)^._operator = A_MULS) or
|
|
(pai68k(hp)^._operator = A_DIVS) or
|
|
(pai68k(hp)^._operator = A_DIVU) then
|
|
s:=s+':'+getopstr(pai68k(hp)^.op3t,pai68k(hp)^.op3)
|
|
else
|
|
s:=s+','+getopstr(pai68k(hp)^.op3t,pai68k(hp)^.op3);
|
|
end;
|
|
end;
|
|
end;
|
|
AsmWriteLn(s);
|
|
end;
|
|
{$ifdef GDB}
|
|
ait_stabs : begin
|
|
AsmWrite(#9'.stabs ');
|
|
AsmWritePChar(pai_stabs(hp)^.str);
|
|
AsmLn;
|
|
end;
|
|
ait_stabn : begin
|
|
AsmWrite(#9'.stabn ');
|
|
AsmWritePChar(pai_stabn(hp)^.str);
|
|
AsmLn;
|
|
end;
|
|
ait_stab_function_name : funcname:=pai_stab_function_name(hp)^.str;
|
|
{$endif GDB}
|
|
else
|
|
internalerror(10000);
|
|
end;
|
|
hp:=pai(hp^.next);
|
|
end;
|
|
end;
|
|
|
|
procedure tm68kmitasmlist.WriteAsmList;
|
|
{$ifdef GDB}
|
|
var
|
|
p:dirstr;
|
|
n:namestr;
|
|
e:extstr;
|
|
{$endif}
|
|
begin
|
|
{$ifdef EXTDEBUG}
|
|
if assigned(current_module^.mainsource) then
|
|
comment(v_info,'Start writing gas-styled assembler output for '+current_module^.mainsource^);
|
|
{$endif}
|
|
{$ifdef GDB}
|
|
infile:=nil;
|
|
includecount:=0;
|
|
if assigned(current_module^.mainsource) then
|
|
fsplit(current_module^.mainsource^,p,n,e)
|
|
else
|
|
begin
|
|
p:=inputdir;
|
|
n:=inputfile;
|
|
e:=inputextension;
|
|
end;
|
|
{ to get symify to work }
|
|
AsmWriteLn(#9'.file "'+FixFileName(n+e)+'"');
|
|
{ stabs }
|
|
n_line:=n_bssline;
|
|
if (cs_debuginfo in aktswitches) then
|
|
begin
|
|
if (p<>'') then
|
|
AsmWriteLn(#9'.stabs "'+FixPath(p)+'",'+tostr(n_sourcefile)+',0,0,Ltext0');
|
|
AsmWriteLn(#9'.stabs "'+FixFileName(n+e)+'",'+tostr(n_sourcefile)+',0,0,Ltext0');
|
|
AsmWriteLn('Ltext0:');
|
|
end;
|
|
infile:=current_module^.sourcefiles.files;
|
|
{ main source file is last in list }
|
|
while assigned(infile^._next) do
|
|
infile:=infile^._next;
|
|
lastline:=0;
|
|
{$endif GDB}
|
|
|
|
{ there should be nothing but externals so we don't need to process
|
|
WriteTree(externals); }
|
|
|
|
WriteTree(debuglist);
|
|
WriteTree(codesegment);
|
|
WriteTree(datasegment);
|
|
WriteTree(consts);
|
|
WriteTree(rttilist);
|
|
WriteTree(bsssegment);
|
|
Writetree(importssection);
|
|
Writetree(exportssection);
|
|
Writetree(resourcesection);
|
|
|
|
AsmLn;
|
|
{$ifdef EXTDEBUG}
|
|
if assigned(current_module^.mainsource) then
|
|
comment(v_info,'Done writing gas-styled assembler output for '+current_module^.mainsource^);
|
|
{$endif EXTDEBUG}
|
|
end;
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.5 1998-06-05 17:46:05 peter
|
|
* tp doesn't like comp() typecast
|
|
|
|
Revision 1.4 1998/06/04 23:51:29 peter
|
|
* m68k compiles
|
|
+ .def file creation moved to gendef.pas so it could also be used
|
|
for win32
|
|
|
|
}
|