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515 lines
22 KiB
ObjectPascal
515 lines
22 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 MOTOROLA syntax with
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Motorola 68000 (recognized by the Amiga Assembler and Charlie Gibbs's
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A68k)
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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 ag68kmot;
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interface
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uses aasm,assemble;
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type
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pm68kmotasmlist=^tm68kmotasmlist;
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tm68kmotasmlist = 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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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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if (index=R_NO) and (base=R_NO) and (direction=dir_none) then
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begin
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if assigned(symbol) then
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begin
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s:=s+symbol^;
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if offset<0 then
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s:=s+tostr(offset)
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else
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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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else
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begin
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{ direct memory addressing }
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s:=s+'('+tostr(offset)+').l';
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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(symbol) then
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s:=s+symbol^;
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if offset<0 then
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s:=s+tostr(offset)
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else
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if (offset>0) then
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begin
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if (symbol=nil) then s:=tostr(offset)
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else s:=s+'+'+tostr(offset);
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end;
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if (index<>R_NO) and (base=R_NO) and (direction=dir_none) 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:=s+'0(,'+mot_reg2str[index]+'.l)'
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else
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s:=s+'(,'+mot_reg2str[index]+'.l)';
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end
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else
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begin
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if offset = 0 then
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s:=s+'0(,'+mot_reg2str[index]+'.l*'+tostr(scalefactor)+')'
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else
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s:=s+'(,'+mot_reg2str[index]+'.l*'+tostr(scalefactor)+')';
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end
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end
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else
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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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s:=s+'('+mot_reg2str[base]+')+'
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else
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InternalError(10002);
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end
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else
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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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s:=s+'-('+mot_reg2str[base]+')'
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else
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InternalError(10003);
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end
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else
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if (index=R_NO) and (base<>R_NO) and (direction=dir_none) then
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begin
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s:=s+'('+mot_reg2str[base]+')';
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end
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else
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if (index<>R_NO) and (base<>R_NO) and (direction=dir_none) 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:=s+'0('+mot_reg2str[base]+','+mot_reg2str[index]+'.l)'
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else
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s:=s+'('+mot_reg2str[base]+','+mot_reg2str[index]+'.l)';
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end
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else
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begin
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if offset = 0 then
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s:=s+'0('+mot_reg2str[base]+','+mot_reg2str[index]+'.l*'+tostr(scalefactor)+')'
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else
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s:=s+'('+mot_reg2str[base]+','+mot_reg2str[index]+'.l*'+tostr(scalefactor)+')';
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end
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end
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{ if this is not a symbol, and is not in the above, then there is an error }
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else
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if NOT assigned(symbol) then
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InternalError(10004);
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end; { endif }
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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:=mot_reg2str[tregister(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+mot_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_ref : getopstr:=getreferencestring(preference(o)^);
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top_const : getopstr:='#'+tostr(longint(o));
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top_symbol : begin
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{ compare with i386 version, where this is a constant. }
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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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{ hs[1]:='#';}
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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:=mot_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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TM68KMOTASMLIST
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****************************************************************************}
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procedure tm68kmotasmlist.WriteTree(p:paasmoutput);
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var
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hp : pai;
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s : string;
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counter,
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i,j,lines : longint;
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quoted : boolean;
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begin
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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 : ;
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ait_align : AsmWriteLn(#9'CNOP 0,'+tostr(pai_align(hp)^.aligntype));
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ait_external : AsmWriteLn(#9'XREF'#9+StrPas(pai_external(hp)^.name));
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ait_real_extended : Message(assem_e_extended_not_supported);
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ait_comp : Message(assem_e_comp_not_supported);
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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'CNOP 0,4')
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else
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AsmWriteLn(#9'CNOP 0,2');
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end;
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if pai_datablock(hp)^.is_global then
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AsmWriteLn(#9'XDEF'#9+StrPas(pai_datablock(hp)^.name));
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AsmWriteLn(StrPas(pai_datablock(hp)^.name)+#9#9'DS.B '+tostr(pai_datablock(hp)^.size));
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end;
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ait_const_32bit : Begin
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if not(cs_littlesize in aktswitches) then
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AsmWriteLn(#9'CNOP 0,4')
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else
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AsmWriteLn(#9'CNOP 0,2');
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AsmWriteLn(#9#9'DC.L'#9+tostr(pai_const(hp)^.value));
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end;
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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'CNOP 0,4')
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else
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AsmWriteLn(#9'CNOP 0,2');
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AsmWriteLn(#9#9'DC.W'#9+tostr(pai_const(hp)^.value));
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end;
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ait_const_8bit : AsmWriteLn(#9#9'DC.B'#9+tostr(pai_const(hp)^.value));
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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'CNOP 0,4')
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else
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AsmWriteLn(#9'CNOP 0,2');
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AsmWriteLn(#9#9+'DC.L '#9+StrPas(pchar(pai_const(hp)^.value)));
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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'CNOP 0,4')
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else
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AsmWriteLn(#9'CNOP 0,2');
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AsmWriteLn(#9#9'DC.D'#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'CNOP 0,4')
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else
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AsmWriteLn(#9'CNOP 0,2');
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AsmWriteLn(#9#9'DC.S'#9+double2str(pai_single(hp)^.value));
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end;
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{ TO SUPPORT SOONER OR LATER!!!
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ait_comp : AsmWriteLn(#9#9'DC.D'#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'DC.B'#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_info.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'DC.B'#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 AsmWrite('"');
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end; { endif }
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AsmLn;
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end;
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ait_label : 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_64bit,ait_string]) then
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AsmWriteLn(':');
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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 :
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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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{ ------------------------------------------------------- }
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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 assigned(hp^.next) and (pai(hp^.next)^.typ in
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[ait_const_32bit,ait_const_16bit,ait_const_symbol,
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ait_real_64bit,ait_real_32bit,ait_string]) then
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begin
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if not(cs_littlesize in aktswitches) then
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AsmWriteLn(#9'CNOP 0,4')
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else
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AsmWriteLn(#9'CNOP 0,2');
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end;
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if pai_symbol(hp)^.is_global then
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AsmWriteLn(#9'XDEF '+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_string,ait_real_32bit]) then
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AsmWriteLn(':');
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end;
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ait_instruction : begin
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s:=#9+mot_op2str[pai68k(hp)^._operator]+mot_opsize2str[pai68k(hp)^.size];
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if pai68k(hp)^.op1t<>top_none then
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begin
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{ call and jmp need an extra handling }
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{ this code is only called if jmp isn't a labeled instruction }
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if pai68k(hp)^._operator in [A_JSR,A_JMP] then
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s:=s+#9+getopstr_jmp(pai68k(hp)^.op1t,pai68k(hp)^.op1)
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else
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begin
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if pai68k(hp)^.op1t = top_reglist then
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s:=s+#9+getopstr(pai68k(hp)^.op1t,@(pai68k(hp)^.reglist))
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else
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s:=s+#9+getopstr(pai68k(hp)^.op1t,pai68k(hp)^.op1);
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if pai68k(hp)^.op2t<>top_none then
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begin
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if pai68k(hp)^.op2t = top_reglist then
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s:=s+','+getopstr(pai68k(hp)^.op2t,@pai68k(hp)^.reglist)
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else
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s:=s+','+getopstr(pai68k(hp)^.op2t,pai68k(hp)^.op2);
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{ three operands }
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if pai68k(hp)^.op3t<>top_none then
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begin
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if (pai68k(hp)^._operator = A_DIVSL) or
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(pai68k(hp)^._operator = A_DIVUL) or
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(pai68k(hp)^._operator = A_MULU) or
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(pai68k(hp)^._operator = A_MULS) or
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(pai68k(hp)^._operator = A_DIVS) or
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(pai68k(hp)^._operator = A_DIVU) then
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s:=s+':'+getopstr(pai68k(hp)^.op3t,pai68k(hp)^.op3)
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else
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s:=s+','+getopstr(pai68k(hp)^.op3t,pai68k(hp)^.op3);
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end;
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end;
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end;
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end;
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AsmWriteLn(s);
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end;
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{$ifdef GDB}
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ait_stabn,
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ait_stabs,
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ait_stab_function_name : ;
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{$endif GDB}
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else
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internalerror(10000);
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end;
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{ if ((hp^.typ<>ait_label) and (hp^.typ<>ait_symbol)) or (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_string])) then
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AsmLn}
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hp:=pai(hp^.next);
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end;
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end;
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procedure tm68kmotasmlist.WriteAsmList;
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begin
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{$ifdef EXTDEBUG}
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if assigned(current_module^.mainsource) then
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comment(v_info,'Start writing motorola-styled assembler output for '+current_module^.mainsource^);
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{$endif}
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WriteTree(externals);
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AsmLn;
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AsmWriteLn(#9'SECTION _CODE,CODE');
|
|
WriteTree(codesegment);
|
|
|
|
AsmLn;
|
|
AsmWriteLn(#9'SECTION _DATA,DATA');
|
|
{ write a signature to the file }
|
|
AsmWriteLn(#9'CNOP 0,4');
|
|
{$ifdef EXTDEBUG}
|
|
AsmWriteLn(#9'DC.B'#9'"compiled by FPC '+version_string+'\0"');
|
|
AsmWriteLn(#9'DC.B'#9'"target: '+target_info.target_name+'\0"');
|
|
{$endif EXTDEBUG}
|
|
WriteTree(datasegment);
|
|
WriteTree(consts);
|
|
|
|
AsmLn;
|
|
AsmWriteLn(#9'SECTION _BSS,BSS');
|
|
WriteTree(bsssegment);
|
|
|
|
AsmLn;
|
|
AsmWriteLn(#9'END');
|
|
{$ifdef EXTDEBUG}
|
|
if assigned(current_module^.mainsource) then
|
|
comment(v_info,'Done writing motorola-styled assembler output for '+current_module^.mainsource^);
|
|
{$endif}
|
|
end;
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.1 1998-03-25 11:18:16 root
|
|
Initial revision
|
|
|
|
Revision 1.3 1998/03/22 12:45:37 florian
|
|
* changes of Carl-Eric to m68k target commit:
|
|
- wrong nodes because of the new string cg in intel, I had to create
|
|
this under m68k also ... had to work it out to fix potential alignment
|
|
problems --> this removes the crash of the m68k compiler.
|
|
- added absolute addressing in m68k assembler (required for Amiga startup)
|
|
- fixed alignment problems (because of byte return values, alignment
|
|
would not be always valid) -- is this ok if i change the offset if odd in
|
|
setfirsttemp ?? -- it seems ok...
|
|
|
|
Revision 1.2 1998/03/10 04:23:33 carl
|
|
- removed in because can cause range check errors under BP
|
|
|
|
Revision 1.1 1998/03/10 01:26:10 peter
|
|
+ new uniform names
|
|
|
|
} |