{
$Id: n68kmat.pas,v 1.7 2003/06/07 18:57:04 jonas Exp $
Copyright (c) 1998-2002 by Florian Klaempfl
Generate 680x0 assembler for math nodes
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 n68kmat;
{$i fpcdefs.inc}
interface
uses
node,nmat,ncgmat,cpubase,cginfo;
type
tm68knotnode = class(tnotnode)
procedure pass_2;override;
end;
tm68kmoddivnode = class(tcgmoddivnode)
procedure emit_div_reg_reg(signed: boolean;denum,num : tregister);override;
procedure emit_mod_reg_reg(signed: boolean;denum,num : tregister);override;
end;
implementation
uses
globtype,systems,
cutils,verbose,globals,
symconst,symdef,aasmbase,aasmtai,aasmcpu,
cgbase,pass_1,pass_2,
ncon,
cpuinfo,paramgr,defutil,
tgobj,ncgutil,cgobj,rgobj,rgcpu,cgcpu,cg64f32;
{*****************************************************************************
TM68KNOTNODE
*****************************************************************************}
procedure tm68knotnode.pass_2;
var
hl : tasmlabel;
opsize : tcgsize;
begin
opsize:=def_cgsize(resulttype.def);
if is_boolean(resulttype.def) then
begin
{ the second pass could change the location of left }
{ if it is a register variable, so we've to do }
{ this before the case statement }
if left.location.loc<>LOC_JUMP then
secondpass(left);
case left.location.loc of
LOC_JUMP :
begin
location_reset(location,LOC_JUMP,OS_NO);
hl:=truelabel;
truelabel:=falselabel;
falselabel:=hl;
secondpass(left);
maketojumpbool(exprasmlist,left,lr_load_regvars);
hl:=truelabel;
truelabel:=falselabel;
falselabel:=hl;
end;
LOC_FLAGS :
begin
location_copy(location,left.location);
location_release(exprasmlist,left.location);
inverse_flags(location.resflags);
end;
LOC_CONSTANT,
LOC_REGISTER,
LOC_CREGISTER,
LOC_REFERENCE,
LOC_CREFERENCE :
begin
location_force_reg(exprasmlist,left.location,def_cgsize(resulttype.def),true);
exprasmlist.concat(taicpu.op_reg(A_TST,tcgsize2opsize[opsize],left.location.register));
location_release(exprasmlist,left.location);
location_reset(location,LOC_FLAGS,OS_NO);
location.resflags:=F_E;
end;
else
internalerror(200203224);
end;
end
else if is_64bitint(left.resulttype.def) then
begin
secondpass(left);
location_copy(location,left.location);
location_force_reg(exprasmlist,location,OS_64,false);
cg64.a_op64_loc_reg(exprasmlist,OP_NOT,location,
joinreg64(location.registerlow,location.registerhigh));
end
else
begin
secondpass(left);
location_force_reg(exprasmlist,left.location,def_cgsize(left.resulttype.def),false);
location_copy(location,left.location);
if location.loc=LOC_CREGISTER then
location.register := rg.getregisterint(exprasmlist,opsize);
{ perform the NOT operation }
cg.a_op_reg_reg(exprasmlist,OP_NOT,opsize,location.register,left.location.register);
end;
end;
{*****************************************************************************
TM68KMODDIVNODE
*****************************************************************************}
procedure tm68kmoddivnode.emit_div_reg_reg(signed: boolean;denum,num : tregister);
var
continuelabel : tasmlabel;
reg_d0,reg_d1 : tregister;
begin
{ no RTL call, so inline a zero denominator verification }
if aktoptprocessor <> MC68000 then
begin
{ verify if denominator is zero }
objectlibrary.getlabel(continuelabel);
{ compare against zero, if not zero continue }
cg.a_cmp_const_reg_label(exprasmlist,OS_S32,OC_NE,0,denum,continuelabel);
cg.a_param_const(exprasmlist, OS_S32,200,paramanager.getintparaloc(exprasmlist,1));
cg.a_call_name(exprasmlist,'FPC_HANDLEERROR');
paramanager.freeintparaloc(exprasmlist,1);
cg.a_label(exprasmlist, continuelabel);
if signed then
exprasmlist.concat(taicpu.op_reg_reg(A_DIVS,S_L,denum,num))
else
exprasmlist.concat(taicpu.op_reg_reg(A_DIVU,S_L,denum,num));
{ result should be in denuminator }
cg.a_load_reg_reg(exprasmlist,OS_INT,OS_INT,num,denum);
end
else
begin
{ On MC68000/68010 mw must pass through RTL routines }
reg_d0:=rg.getexplicitregisterint(exprasmlist,NR_D0);
reg_d1:=rg.getexplicitregisterint(exprasmlist,NR_D1);
{ put numerator in d0 }
cg.a_load_reg_reg(exprasmlist,OS_INT,OS_INT,num,reg_d0);
{ put denum in D1 }
cg.a_load_reg_reg(exprasmlist,OS_INT,OS_INT,denum,reg_d1);
if signed then
cg.a_call_name(exprasmlist,'FPC_DIV_LONGINT')
else
cg.a_call_name(exprasmlist,'FPC_DIV_CARDINAL');
cg.a_load_reg_reg(exprasmlist,OS_INT,OS_INT,reg_d0,denum);
rg.ungetregisterint(exprasmlist,reg_d0);
rg.ungetregisterint(exprasmlist,reg_d1);
end;
end;
procedure tm68kmoddivnode.emit_mod_reg_reg(signed: boolean;denum,num : tregister);
var tmpreg : tregister;
continuelabel : tasmlabel;
signlabel : tasmlabel;
reg_d0,reg_d1 : tregister;
begin
{ no RTL call, so inline a zero denominator verification }
if aktoptprocessor <> MC68000 then
begin
{ verify if denominator is zero }
objectlibrary.getlabel(continuelabel);
{ compare against zero, if not zero continue }
cg.a_cmp_const_reg_label(exprasmlist,OS_S32,OC_NE,0,denum,continuelabel);
cg.a_param_const(exprasmlist, OS_S32,200,paramanager.getintparaloc(exprasmlist,1));
cg.a_call_name(exprasmlist,'FPC_HANDLEERROR');
paramanager.freeintparaloc(exprasmlist,1);
cg.a_label(exprasmlist, continuelabel);
tmpreg := cg.get_scratch_reg_int(exprasmlist,OS_INT);
{ we have to prepare the high register with the }
{ correct sign. i.e we clear it, check if the low dword reg }
{ which will participate in the division is signed, if so we}
{ we extend the sign to the high doword register by inverting }
{ all the bits. }
exprasmlist.concat(taicpu.op_reg(A_CLR,S_L,tmpreg));
objectlibrary.getlabel(signlabel);
exprasmlist.concat(taicpu.op_reg(A_TST,S_L,tmpreg));
cg.a_cmp_const_reg_label(exprasmlist,OS_S32,OC_A,0,tmpreg,signlabel);
{ its a negative value, therefore change sign }
cg.a_label(exprasmlist,signlabel);
{ tmpreg:num / denum }
if signed then
exprasmlist.concat(taicpu.op_reg_reg_reg(A_DIVSL,S_L,denum,tmpreg,num))
else
exprasmlist.concat(taicpu.op_reg_reg_reg(A_DIVUL,S_L,denum,tmpreg,num));
{ remainder in tmpreg }
cg.a_load_reg_reg(exprasmlist,OS_INT,OS_INT,tmpreg,denum);
cg.free_scratch_reg(exprasmlist,tmpreg);
end
else
begin
{ On MC68000/68010 mw must pass through RTL routines }
Reg_d0:=rg.getexplicitregisterint(exprasmlist,NR_D0);
Reg_d1:=rg.getexplicitregisterint(exprasmlist,NR_D1);
{ put numerator in d0 }
cg.a_load_reg_reg(exprasmlist,OS_INT,OS_INT,num,Reg_D0);
{ put denum in D1 }
cg.a_load_reg_reg(exprasmlist,OS_INT,OS_INT,denum,Reg_D1);
if signed then
cg.a_call_name(exprasmlist,'FPC_MOD_LONGINT')
else
cg.a_call_name(exprasmlist,'FPC_MOD_CARDINAL');
cg.a_load_reg_reg(exprasmlist,OS_INT,OS_INT,Reg_D0,denum);
rg.ungetregisterint(exprasmlist,Reg_D0);
rg.ungetregisterint(exprasmlist,Reg_D1);
end;
end;
begin
cnotnode:=tm68knotnode;
cmoddivnode:=tm68kmoddivnode;
end.
{
$Log: n68kmat.pas,v $
Revision 1.7 2003/06/07 18:57:04 jonas
+ added freeintparaloc
* ppc get/freeintparaloc now check whether the parameter regs are
properly allocated/deallocated (and get an extra list para)
* ppc a_call_* now internalerrors if pi_do_call is not yet set
* fixed lot of missing pi_do_call's
Revision 1.6 2003/02/19 22:00:16 daniel
* Code generator converted to new register notation
- Horribily outdated todo.txt removed
Revision 1.5 2003/02/02 19:25:54 carl
* Several bugfixes for m68k target (register alloc., opcode emission)
+ VIS target
+ Generic add more complete (still not verified)
Revision 1.4 2002/09/07 15:25:13 peter
* old logs removed and tabs fixed
Revision 1.3 2002/08/15 15:15:55 carl
* jmpbuf size allocation for exceptions is now cpu specific (as it should)
* more generic nodes for maths
* several fixes for better m68k support
Revision 1.2 2002/08/15 08:13:54 carl
- a_load_sym_ofs_reg removed
* loadvmt now calls loadaddr_ref_reg instead
Revision 1.1 2002/08/14 19:16:34 carl
+ m68k type conversion nodes
+ started some mathematical nodes
* out of bound references should now be handled correctly
}
syntax highlighted by Code2HTML, v. 0.9.1