mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-04-13 05:51:02 +02:00
393 lines
15 KiB
ObjectPascal
393 lines
15 KiB
ObjectPascal
{
|
|
$Id$
|
|
Copyright (c) 1998-2000 by Florian Klaempfl
|
|
|
|
Generate m68k assembler for constants
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
****************************************************************************
|
|
}
|
|
unit cg68kcon;
|
|
interface
|
|
|
|
uses
|
|
tree;
|
|
|
|
{.$define SMALLSETORD}
|
|
|
|
|
|
procedure secondrealconst(var p : ptree);
|
|
procedure secondfixconst(var p : ptree);
|
|
procedure secondordconst(var p : ptree);
|
|
procedure secondstringconst(var p : ptree);
|
|
procedure secondsetconst(var p : ptree);
|
|
procedure secondniln(var p : ptree);
|
|
|
|
|
|
implementation
|
|
|
|
uses
|
|
globtype,systems,
|
|
cobjects,verbose,globals,
|
|
symtable,aasm,types,
|
|
hcodegen,temp_gen,pass_2,
|
|
cpubase,cga68k,tgen68k,symconst;
|
|
|
|
{*****************************************************************************
|
|
SecondRealConst
|
|
*****************************************************************************}
|
|
|
|
procedure secondrealconst(var p : ptree);
|
|
const
|
|
floattype2ait:array[tfloattype] of tait=
|
|
(ait_real_32bit,ait_real_64bit,ait_real_80bit,ait_comp_64bit,ait_none,ait_none);
|
|
var
|
|
hp1 : pai;
|
|
lastlabel : pasmlabel;
|
|
realait : tait;
|
|
begin
|
|
lastlabel:=nil;
|
|
realait:=floattype2ait[pfloatdef(p^.resulttype)^.typ];
|
|
{ const already used ? }
|
|
if not assigned(p^.lab_real) then
|
|
begin
|
|
{ tries to found an old entry }
|
|
hp1:=pai(consts^.first);
|
|
while assigned(hp1) do
|
|
begin
|
|
if hp1^.typ=ait_label then
|
|
lastlabel:=pai_label(hp1)^.l
|
|
else
|
|
begin
|
|
if (hp1^.typ=realait) and (lastlabel<>nil) then
|
|
begin
|
|
if(
|
|
((realait=ait_real_32bit) and (pai_real_32bit(hp1)^.value=p^.value_real)) or
|
|
((realait=ait_real_64bit) and (pai_real_64bit(hp1)^.value=p^.value_real)) or
|
|
((realait=ait_real_80bit) and (pai_real_80bit(hp1)^.value=p^.value_real)) or
|
|
((realait=ait_comp_64bit) and (pai_comp_64bit(hp1)^.value=p^.value_real))
|
|
) then
|
|
begin
|
|
{ found! }
|
|
p^.lab_real:=lastlabel;
|
|
break;
|
|
end;
|
|
end;
|
|
lastlabel:=nil;
|
|
end;
|
|
hp1:=pai(hp1^.next);
|
|
end;
|
|
{ :-(, we must generate a new entry }
|
|
if not assigned(p^.lab_real) then
|
|
begin
|
|
getdatalabel(lastlabel);
|
|
p^.lab_real:=lastlabel;
|
|
if (cs_create_smart in aktmoduleswitches) then
|
|
consts^.concat(new(pai_cut,init));
|
|
consts^.concat(new(pai_label,init(lastlabel)));
|
|
case realait of
|
|
ait_real_64bit : consts^.concat(new(pai_real_32bit,init(p^.value_real)));
|
|
ait_real_32bit : consts^.concat(new(pai_real_32bit,init(p^.value_real)));
|
|
ait_real_80bit : consts^.concat(new(pai_real_32bit,init(p^.value_real)));
|
|
else
|
|
internalerror(10120);
|
|
end;
|
|
end;
|
|
end;
|
|
clear_reference(p^.location.reference);
|
|
p^.location.reference.symbol:=stringdup(p^.lab_real^.name);
|
|
p^.location.loc:=LOC_MEM;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondFixConst
|
|
*****************************************************************************}
|
|
|
|
procedure secondfixconst(var p : ptree);
|
|
begin
|
|
{ an fix comma const. behaves as a memory reference }
|
|
p^.location.loc:=LOC_MEM;
|
|
p^.location.reference.isintvalue:=true;
|
|
p^.location.reference.offset:=p^.value_fix;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondOrdConst
|
|
*****************************************************************************}
|
|
|
|
procedure secondordconst(var p : ptree);
|
|
begin
|
|
{ an integer const. behaves as a memory reference }
|
|
p^.location.loc:=LOC_MEM;
|
|
p^.location.reference.isintvalue:=true;
|
|
p^.location.reference.offset:=p^.value;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondStringConst
|
|
*****************************************************************************}
|
|
|
|
procedure secondstringconst(var p : ptree);
|
|
var
|
|
hp1 : pai;
|
|
l1,l2,
|
|
lastlabel : pasmlabel;
|
|
pc : pchar;
|
|
same_string : boolean;
|
|
i,mylength : longint;
|
|
begin
|
|
lastlabel:=nil;
|
|
{ const already used ? }
|
|
if not assigned(p^.lab_str) then
|
|
begin
|
|
if is_shortstring(p^.resulttype) then
|
|
mylength:=p^.length+2
|
|
else
|
|
mylength:=p^.length+1;
|
|
{ tries to found an old entry }
|
|
hp1:=pai(consts^.first);
|
|
while assigned(hp1) do
|
|
begin
|
|
if hp1^.typ=ait_label then
|
|
lastlabel:=pai_label(hp1)^.l
|
|
else
|
|
begin
|
|
{ when changing that code, be careful that }
|
|
{ you don't use typed consts, which are }
|
|
{ are also written to consts }
|
|
{ currently, this is no problem, because }
|
|
{ typed consts have no leading length or }
|
|
{ they have no trailing zero }
|
|
if (hp1^.typ=ait_string) and (lastlabel<>nil) and
|
|
(pai_string(hp1)^.len=mylength) then
|
|
begin
|
|
same_string:=true;
|
|
for i:=0 to p^.length do
|
|
if pai_string(hp1)^.str[i]<>p^.value_str[i] then
|
|
begin
|
|
same_string:=false;
|
|
break;
|
|
end;
|
|
if same_string then
|
|
begin
|
|
{ found! }
|
|
p^.lab_str:=lastlabel;
|
|
break;
|
|
end;
|
|
end;
|
|
lastlabel:=nil;
|
|
end;
|
|
hp1:=pai(hp1^.next);
|
|
end;
|
|
{ :-(, we must generate a new entry }
|
|
if not assigned(p^.lab_str) then
|
|
begin
|
|
getdatalabel(lastlabel);
|
|
p^.lab_str:=lastlabel;
|
|
if (cs_create_smart in aktmoduleswitches) then
|
|
consts^.concat(new(pai_cut,init));
|
|
consts^.concat(new(pai_label,init(lastlabel)));
|
|
{ generate an ansi string ? }
|
|
case p^.stringtype of
|
|
st_ansistring:
|
|
begin
|
|
{ an empty ansi string is nil! }
|
|
if p^.length=0 then
|
|
consts^.concat(new(pai_const,init_32bit(0)))
|
|
else
|
|
begin
|
|
getdatalabel(l1);
|
|
getdatalabel(l2);
|
|
consts^.concat(new(pai_label,init(l2)));
|
|
consts^.concat(new(pai_const_symbol,init(l1)));
|
|
consts^.concat(new(pai_const,init_32bit(p^.length)));
|
|
consts^.concat(new(pai_const,init_32bit(p^.length)));
|
|
consts^.concat(new(pai_const,init_32bit(-1)));
|
|
consts^.concat(new(pai_label,init(l1)));
|
|
getmem(pc,p^.length+2);
|
|
move(p^.value_str^,pc^,p^.length);
|
|
pc[p^.length]:=#0;
|
|
{ to overcome this problem we set the length explicitly }
|
|
{ with the ending null char }
|
|
consts^.concat(new(pai_string,init_length_pchar(pc,p^.length+1)));
|
|
{ return the offset of the real string }
|
|
p^.lab_str:=l2;
|
|
end;
|
|
end;
|
|
st_shortstring:
|
|
begin
|
|
{ empty strings }
|
|
if p^.length=0 then
|
|
consts^.concat(new(pai_const,init_16bit(0)))
|
|
else
|
|
begin
|
|
{ also length and terminating zero }
|
|
getmem(pc,p^.length+3);
|
|
move(p^.value_str^,pc[1],p^.length+1);
|
|
pc[0]:=chr(p^.length);
|
|
{ to overcome this problem we set the length explicitly }
|
|
{ with the ending null char }
|
|
pc[p^.length+1]:=#0;
|
|
consts^.concat(new(pai_string,init_length_pchar(pc,p^.length+2)));
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
clear_reference(p^.location.reference);
|
|
p^.location.reference.symbol:=stringdup(p^.lab_str^.name);
|
|
p^.location.loc:=LOC_MEM;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondSetCons
|
|
*****************************************************************************}
|
|
|
|
procedure secondsetconst(var p : ptree);
|
|
var
|
|
hp1 : pai;
|
|
lastlabel : pasmlabel;
|
|
i : longint;
|
|
neededtyp : tait;
|
|
begin
|
|
{$ifdef SMALLSETORD}
|
|
{ small sets are loaded as constants }
|
|
if psetdef(p^.resulttype)^.settype=smallset then
|
|
begin
|
|
p^.location.loc:=LOC_MEM;
|
|
p^.location.reference.isintvalue:=true;
|
|
p^.location.reference.offset:=plongint(p^.value_set)^;
|
|
exit;
|
|
end;
|
|
{$endif}
|
|
if psetdef(p^.resulttype)^.settype=smallset then
|
|
neededtyp:=ait_const_32bit
|
|
else
|
|
neededtyp:=ait_const_8bit;
|
|
lastlabel:=nil;
|
|
{ const already used ? }
|
|
if not assigned(p^.lab_set) then
|
|
begin
|
|
{ tries to found an old entry }
|
|
hp1:=pai(consts^.first);
|
|
while assigned(hp1) do
|
|
begin
|
|
if hp1^.typ=ait_label then
|
|
lastlabel:=pai_label(hp1)^.l
|
|
else
|
|
begin
|
|
if (lastlabel<>nil) and (hp1^.typ=neededtyp) then
|
|
begin
|
|
if (hp1^.typ=ait_const_8bit) then
|
|
begin
|
|
{ compare normal set }
|
|
i:=0;
|
|
while assigned(hp1) and (i<32) do
|
|
begin
|
|
if pai_const(hp1)^.value<>p^.value_set^[i] then
|
|
break;
|
|
inc(i);
|
|
hp1:=pai(hp1^.next);
|
|
end;
|
|
if i=32 then
|
|
begin
|
|
{ found! }
|
|
p^.lab_set:=lastlabel;
|
|
break;
|
|
end;
|
|
{ leave when the end of consts is reached, so no
|
|
hp1^.next is done }
|
|
if not assigned(hp1) then
|
|
break;
|
|
end
|
|
else
|
|
begin
|
|
{ compare small set }
|
|
if plongint(p^.value_set)^=pai_const(hp1)^.value then
|
|
begin
|
|
{ found! }
|
|
p^.lab_set:=lastlabel;
|
|
break;
|
|
end;
|
|
end;
|
|
end;
|
|
lastlabel:=nil;
|
|
end;
|
|
hp1:=pai(hp1^.next);
|
|
end;
|
|
{ :-(, we must generate a new entry }
|
|
if not assigned(p^.lab_set) then
|
|
begin
|
|
getdatalabel(lastlabel);
|
|
p^.lab_set:=lastlabel;
|
|
if (cs_create_smart in aktmoduleswitches) then
|
|
consts^.concat(new(pai_cut,init));
|
|
consts^.concat(new(pai_label,init(lastlabel)));
|
|
if psetdef(p^.resulttype)^.settype=smallset then
|
|
begin
|
|
move(p^.value_set^,i,sizeof(longint));
|
|
consts^.concat(new(pai_const,init_32bit(i)));
|
|
end
|
|
else
|
|
begin
|
|
for i:=0 to 31 do
|
|
consts^.concat(new(pai_const,init_8bit(p^.value_set^[i])));
|
|
end;
|
|
end;
|
|
end;
|
|
clear_reference(p^.location.reference);
|
|
p^.location.reference.symbol:=stringdup(p^.lab_set^.name);
|
|
p^.location.loc:=LOC_MEM;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondNilN
|
|
*****************************************************************************}
|
|
|
|
procedure secondniln(var p : ptree);
|
|
begin
|
|
p^.location.loc:=LOC_MEM;
|
|
p^.location.reference.isintvalue:=true;
|
|
p^.location.reference.offset:=0;
|
|
end;
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.1 2000-07-13 06:29:46 michael
|
|
+ Initial import
|
|
|
|
Revision 1.9 2000/02/09 13:22:49 peter
|
|
* log truncated
|
|
|
|
Revision 1.8 2000/01/07 01:14:22 peter
|
|
* updated copyright to 2000
|
|
|
|
Revision 1.7 1999/09/20 16:38:52 peter
|
|
* cs_create_smart instead of cs_smartlink
|
|
* -CX is create smartlink
|
|
* -CD is create dynamic, but does nothing atm.
|
|
|
|
Revision 1.6 1999/09/16 23:05:51 florian
|
|
* m68k compiler is again compilable (only gas writer, no assembler reader)
|
|
|
|
}
|