mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-10-31 11:31:39 +01:00
471 lines
21 KiB
ObjectPascal
471 lines
21 KiB
ObjectPascal
{
|
|
$Id$
|
|
Copyright (c) 1993-98 by Florian Klaempfl
|
|
|
|
Generate m68k 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 cg68kmat;
|
|
interface
|
|
|
|
uses
|
|
tree;
|
|
|
|
procedure secondmoddiv(var p : ptree);
|
|
procedure secondshlshr(var p : ptree);
|
|
procedure secondumminus(var p : ptree);
|
|
procedure secondnot(var p : ptree);
|
|
|
|
|
|
implementation
|
|
|
|
uses
|
|
globtype,systems,
|
|
cobjects,verbose,globals,
|
|
symtable,aasm,types,
|
|
hcodegen,temp_gen,pass_2,
|
|
m68k,cga68k,tgen68k;
|
|
|
|
{*****************************************************************************
|
|
SecondModDiv
|
|
*****************************************************************************}
|
|
|
|
{ D0 and D1 used as temp (ok) }
|
|
procedure secondmoddiv(var p : ptree);
|
|
|
|
var
|
|
hreg1 : tregister;
|
|
power : longint;
|
|
hl : plabel;
|
|
reg: tregister;
|
|
pushed: boolean;
|
|
hl1: plabel;
|
|
begin
|
|
secondpass(p^.left);
|
|
set_location(p^.location,p^.left^.location);
|
|
pushed:=maybe_push(p^.right^.registers32,p);
|
|
secondpass(p^.right);
|
|
if pushed then restore(p);
|
|
|
|
{ put numerator in register }
|
|
if p^.left^.location.loc<>LOC_REGISTER then
|
|
begin
|
|
if p^.left^.location.loc=LOC_CREGISTER then
|
|
begin
|
|
hreg1:=getregister32;
|
|
emit_reg_reg(A_MOVE,S_L,p^.left^.location.register,hreg1);
|
|
end
|
|
else
|
|
begin
|
|
del_reference(p^.left^.location.reference);
|
|
hreg1:=getregister32;
|
|
exprasmlist^.concat(new(pai68k,op_ref_reg(A_MOVE,S_L,newreference(p^.left^.location.reference),
|
|
hreg1)));
|
|
end;
|
|
clear_location(p^.left^.location);
|
|
p^.left^.location.loc:=LOC_REGISTER;
|
|
p^.left^.location.register:=hreg1;
|
|
end
|
|
else hreg1:=p^.left^.location.register;
|
|
|
|
if (p^.treetype=divn) and (p^.right^.treetype=ordconstn) and
|
|
ispowerof2(p^.right^.value,power) then
|
|
begin
|
|
exprasmlist^.concat(new(pai68k, op_reg(A_TST, S_L, hreg1)));
|
|
getlabel(hl);
|
|
emitl(A_BPL,hl);
|
|
if (power = 1) then
|
|
exprasmlist^.concat(new(pai68k, op_const_reg(A_ADDQ, S_L,1, hreg1)))
|
|
else
|
|
Begin
|
|
{ optimize using ADDQ if possible! }
|
|
if (p^.right^.value-1) < 9 then
|
|
exprasmlist^.concat(new(pai68k, op_const_reg(A_ADDQ, S_L,p^.right^.value-1, hreg1)))
|
|
else
|
|
exprasmlist^.concat(new(pai68k, op_const_reg(A_ADD, S_L,p^.right^.value-1, hreg1)));
|
|
end;
|
|
emitl(A_LABEL, hl);
|
|
if (power > 0) and (power < 9) then
|
|
exprasmlist^.concat(new(pai68k, op_const_reg(A_ASR, S_L,power, hreg1)))
|
|
else
|
|
begin
|
|
exprasmlist^.concat(new(pai68k, op_const_reg(A_MOVE,S_L,power, R_D0)));
|
|
exprasmlist^.concat(new(pai68k, op_reg_reg(A_ASR,S_L,R_D0, hreg1)));
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
{ bring denominator to D1 }
|
|
{ D1 is always free, it's }
|
|
{ only used for temporary }
|
|
{ purposes }
|
|
if (p^.right^.location.loc<>LOC_REGISTER) and
|
|
(p^.right^.location.loc<>LOC_CREGISTER) then
|
|
begin
|
|
del_reference(p^.right^.location.reference);
|
|
p^.left^.location.loc:=LOC_REGISTER;
|
|
exprasmlist^.concat(new(pai68k,op_ref_reg(A_MOVE,S_L,newreference(p^.right^.location.reference),R_D1)));
|
|
end
|
|
else
|
|
begin
|
|
ungetregister32(p^.right^.location.register);
|
|
emit_reg_reg(A_MOVE,S_L,p^.right^.location.register,R_D1);
|
|
end;
|
|
|
|
{ on entering this section D1 should contain the divisor }
|
|
|
|
if (aktoptprocessor = MC68020) then
|
|
begin
|
|
{ Check if divisor is ZERO - if so call HALT_ERROR }
|
|
{ with d0 = 200 (Division by zero!) }
|
|
getlabel(hl1);
|
|
exprasmlist^.concat(new(pai68k,op_reg(A_TST,S_L,R_D1)));
|
|
{ if not zero then simply continue on }
|
|
emitl(A_BNE,hl1);
|
|
exprasmlist^.concat(new(pai68k,op_const_reg(A_MOVE,S_L,200,R_D0)));
|
|
emitcall('FPC_HALT_ERROR',true);
|
|
emitl(A_LABEL,hl1);
|
|
if (p^.treetype = modn) then
|
|
Begin
|
|
reg := getregister32;
|
|
exprasmlist^.concat(new(pai68k,op_reg(A_CLR,S_L,reg)));
|
|
getlabel(hl);
|
|
{ here what we do is 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(new(pai68k,op_reg(A_TST,S_L,hreg1)));
|
|
emitl(A_BPL,hl);
|
|
exprasmlist^.concat(new(pai68k,op_reg(A_NOT,S_L,reg)));
|
|
emitl(A_LABEL,hl);
|
|
{ reg:hreg1 / d1 }
|
|
exprasmlist^.concat(new(pai68k,op_reg_reg_reg(A_DIVSL,S_L,R_D1,reg,hreg1)));
|
|
{ hreg1 already contains quotient }
|
|
{ looking for remainder }
|
|
exprasmlist^.concat(new(pai68k,op_reg_reg(A_MOVE,S_L,reg,hreg1)));
|
|
ungetregister32(reg);
|
|
end
|
|
else
|
|
{ simple division... }
|
|
Begin
|
|
{ reg:hreg1 / d1 }
|
|
exprasmlist^.concat(new(pai68k,op_reg_reg(A_DIVS,S_L,R_D1,hreg1)));
|
|
end;
|
|
end
|
|
else { MC68000 operations }
|
|
begin
|
|
{ put numerator in d0 }
|
|
emit_reg_reg(A_MOVE,S_L,hreg1,R_D0);
|
|
{ operation to perform on entry to both }
|
|
{ routines... d0/d1 }
|
|
{ return result in d0 }
|
|
if p^.treetype = divn then
|
|
emitcall('FPC_LONGDIV',true)
|
|
else
|
|
emitcall('FPC_LONGMOD',true);
|
|
emit_reg_reg(A_MOVE,S_L,R_D0,hreg1);
|
|
end; { endif }
|
|
end;
|
|
{ this registers are always used when div/mod are present }
|
|
usedinproc:=usedinproc or ($800 shr word(R_D1));
|
|
usedinproc:=usedinproc or ($800 shr word(R_D0));
|
|
clear_location(p^.location);
|
|
p^.location.loc:=LOC_REGISTER;
|
|
p^.location.register:=hreg1;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondShlShr
|
|
*****************************************************************************}
|
|
|
|
{ D6 used as scratch (ok) }
|
|
procedure secondshlshr(var p : ptree);
|
|
|
|
var
|
|
hregister1,hregister2,hregister3 : tregister;
|
|
op : tasmop;
|
|
pushed : boolean;
|
|
begin
|
|
|
|
secondpass(p^.left);
|
|
pushed:=maybe_push(p^.right^.registers32,p);
|
|
secondpass(p^.right);
|
|
if pushed then restore(p);
|
|
|
|
{ load left operators in a register }
|
|
if p^.left^.location.loc<>LOC_REGISTER then
|
|
begin
|
|
if p^.left^.location.loc=LOC_CREGISTER then
|
|
begin
|
|
hregister1:=getregister32;
|
|
emit_reg_reg(A_MOVE,S_L,p^.left^.location.register,
|
|
hregister1);
|
|
end
|
|
else
|
|
begin
|
|
del_reference(p^.left^.location.reference);
|
|
hregister1:=getregister32;
|
|
exprasmlist^.concat(new(pai68k,op_ref_reg(A_MOVE,S_L,newreference(p^.left^.location.reference),
|
|
hregister1)));
|
|
end;
|
|
end
|
|
else hregister1:=p^.left^.location.register;
|
|
|
|
{ determine operator }
|
|
if p^.treetype=shln then
|
|
op:=A_LSL
|
|
else
|
|
op:=A_LSR;
|
|
|
|
{ shifting by a constant directly decode: }
|
|
if (p^.right^.treetype=ordconstn) then
|
|
begin
|
|
if (p^.right^.location.reference.offset and 31 > 0) and (p^.right^.location.reference.offset and 31 < 9) then
|
|
exprasmlist^.concat(new(pai68k,op_const_reg(op,S_L,p^.right^.location.reference.offset and 31,
|
|
hregister1)))
|
|
else
|
|
begin
|
|
exprasmlist^.concat(new(pai68k,op_const_reg(A_MOVE,S_L,p^.right^.location.reference.offset and 31,
|
|
R_D6)));
|
|
exprasmlist^.concat(new(pai68k,op_reg_reg(op,S_L,R_D6,hregister1)));
|
|
end;
|
|
p^.location.loc:=LOC_REGISTER;
|
|
p^.location.register:=hregister1;
|
|
end
|
|
else
|
|
begin
|
|
{ load right operators in a register }
|
|
if p^.right^.location.loc<>LOC_REGISTER then
|
|
begin
|
|
if p^.right^.location.loc=LOC_CREGISTER then
|
|
begin
|
|
hregister2:=getregister32;
|
|
emit_reg_reg(A_MOVE,S_L,p^.right^.location.register,
|
|
hregister2);
|
|
end
|
|
else
|
|
begin
|
|
del_reference(p^.right^.location.reference);
|
|
hregister2:=getregister32;
|
|
exprasmlist^.concat(new(pai68k,op_ref_reg(A_MOVE,S_L,newreference(p^.right^.location.reference),
|
|
hregister2)));
|
|
end;
|
|
end
|
|
else hregister2:=p^.right^.location.register;
|
|
|
|
|
|
emit_reg_reg(op,S_L,hregister2,hregister1);
|
|
p^.location.register:=hregister1;
|
|
end;
|
|
{ this register is always used when shl/shr are present }
|
|
usedinproc:=usedinproc or ($800 shr byte(R_D6));
|
|
end;
|
|
|
|
{*****************************************************************************
|
|
SecondUmMinus
|
|
*****************************************************************************}
|
|
|
|
procedure secondumminus(var p : ptree);
|
|
|
|
begin
|
|
secondpass(p^.left);
|
|
p^.location.loc:=LOC_REGISTER;
|
|
case p^.left^.location.loc of
|
|
LOC_REGISTER : begin
|
|
p^.location.register:=p^.left^.location.register;
|
|
exprasmlist^.concat(new(pai68k,op_reg(A_NEG,S_L,p^.location.register)));
|
|
end;
|
|
LOC_CREGISTER : begin
|
|
p^.location.register:=getregister32;
|
|
emit_reg_reg(A_MOVE,S_L,p^.location.register,
|
|
p^.location.register);
|
|
exprasmlist^.concat(new(pai68k,op_reg(A_NEG,S_L,p^.location.register)));
|
|
end;
|
|
LOC_REFERENCE,LOC_MEM :
|
|
begin
|
|
del_reference(p^.left^.location.reference);
|
|
{ change sign of a floating point }
|
|
{ in the case of emulation, get }
|
|
{ a free register, and change sign }
|
|
{ manually. }
|
|
{ otherwise simply load into an FPU}
|
|
{ register. }
|
|
if (p^.left^.resulttype^.deftype=floatdef) and
|
|
(pfloatdef(p^.left^.resulttype)^.typ<>f32bit) then
|
|
begin
|
|
{ move to FPU }
|
|
floatload(pfloatdef(p^.left^.resulttype)^.typ,
|
|
p^.left^.location.reference,p^.location);
|
|
if (cs_fp_emulation) in aktmoduleswitches then
|
|
{ if in emulation mode change sign manually }
|
|
exprasmlist^.concat(new(pai68k,op_const_reg(A_BCHG,S_L,31,
|
|
p^.location.fpureg)))
|
|
else
|
|
exprasmlist^.concat(new(pai68k,op_reg(A_FNEG,S_FX,
|
|
p^.location.fpureg)));
|
|
end
|
|
else
|
|
begin
|
|
p^.location.register:=getregister32;
|
|
exprasmlist^.concat(new(pai68k,op_ref_reg(A_MOVE,S_L,
|
|
newreference(p^.left^.location.reference),
|
|
p^.location.register)));
|
|
exprasmlist^.concat(new(pai68k,op_reg(A_NEG,S_L,p^.location.register)));
|
|
end;
|
|
end;
|
|
LOC_FPU : begin
|
|
p^.location.loc:=LOC_FPU;
|
|
p^.location.fpureg := p^.left^.location.fpureg;
|
|
if (cs_fp_emulation) in aktmoduleswitches then
|
|
exprasmlist^.concat(new(pai68k,op_const_reg(A_BCHG,S_L,31,p^.location.fpureg)))
|
|
else
|
|
exprasmlist^.concat(new(pai68k,op_reg(A_FNEG,S_FX,p^.location.fpureg)));
|
|
end;
|
|
end;
|
|
{ emitoverflowcheck;}
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondNot
|
|
*****************************************************************************}
|
|
|
|
procedure secondnot(var p : ptree);
|
|
|
|
const
|
|
flagsinvers : array[F_E..F_BE] of tresflags =
|
|
(F_NE,F_E,F_LE,F_GE,F_L,F_G,F_NC,F_C,
|
|
F_A,F_AE,F_B,F_BE);
|
|
|
|
var
|
|
hl : plabel;
|
|
|
|
begin
|
|
if (p^.resulttype^.deftype=orddef) and
|
|
(porddef(p^.resulttype)^.typ=bool8bit) then
|
|
begin
|
|
case p^.location.loc of
|
|
LOC_JUMP : begin
|
|
hl:=truelabel;
|
|
truelabel:=falselabel;
|
|
falselabel:=hl;
|
|
secondpass(p^.left);
|
|
maketojumpbool(p^.left);
|
|
hl:=truelabel;
|
|
truelabel:=falselabel;
|
|
falselabel:=hl;
|
|
end;
|
|
LOC_FLAGS : begin
|
|
secondpass(p^.left);
|
|
p^.location.resflags:=flagsinvers[p^.left^.location.resflags];
|
|
end;
|
|
LOC_REGISTER : begin
|
|
secondpass(p^.left);
|
|
p^.location.register:=p^.left^.location.register;
|
|
exprasmlist^.concat(new(pai68k,op_const_reg(A_EOR,S_B,1,p^.location.register)));
|
|
end;
|
|
LOC_CREGISTER : begin
|
|
secondpass(p^.left);
|
|
p^.location.loc:=LOC_REGISTER;
|
|
p^.location.register:=getregister32;
|
|
emit_reg_reg(A_MOVE,S_B,p^.left^.location.register,
|
|
p^.location.register);
|
|
exprasmlist^.concat(new(pai68k,op_const_reg(A_EOR,S_B,1,p^.location.register)));
|
|
end;
|
|
LOC_REFERENCE,LOC_MEM : begin
|
|
secondpass(p^.left);
|
|
del_reference(p^.left^.location.reference);
|
|
p^.location.loc:=LOC_REGISTER;
|
|
p^.location.register:=getregister32;
|
|
if p^.left^.location.loc=LOC_CREGISTER then
|
|
emit_reg_reg(A_MOVE,S_B,p^.left^.location.register,
|
|
p^.location.register)
|
|
else
|
|
exprasmlist^.concat(new(pai68k,op_ref_reg(A_MOVE,S_B,
|
|
newreference(p^.left^.location.reference),
|
|
p^.location.register)));
|
|
exprasmlist^.concat(new(pai68k,op_const_reg(A_EOR,S_B,1,p^.location.register)));
|
|
end;
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
secondpass(p^.left);
|
|
p^.location.loc:=LOC_REGISTER;
|
|
|
|
case p^.left^.location.loc of
|
|
LOC_REGISTER : begin
|
|
p^.location.register:=p^.left^.location.register;
|
|
exprasmlist^.concat(new(pai68k,op_reg(A_NOT,S_L,p^.location.register)));
|
|
end;
|
|
LOC_CREGISTER : begin
|
|
p^.location.register:=getregister32;
|
|
emit_reg_reg(A_MOVE,S_L,p^.left^.location.register,
|
|
p^.location.register);
|
|
exprasmlist^.concat(new(pai68k,op_reg(A_NOT,S_L,p^.location.register)));
|
|
end;
|
|
LOC_REFERENCE,LOC_MEM :
|
|
begin
|
|
del_reference(p^.left^.location.reference);
|
|
p^.location.register:=getregister32;
|
|
exprasmlist^.concat(new(pai68k,op_ref_reg(A_MOVE,S_L,
|
|
newreference(p^.left^.location.reference),
|
|
p^.location.register)));
|
|
exprasmlist^.concat(new(pai68k,op_reg(A_NOT,S_L,p^.location.register)));
|
|
end;
|
|
end;
|
|
{if p^.left^.location.loc=loc_register then
|
|
p^.location.register:=p^.left^.location.register
|
|
else
|
|
begin
|
|
del_locref(p^.left^.location);
|
|
p^.location.register:=getregister32;
|
|
exprasmlist^.concat(new(pai68k,op_loc_reg(A_MOV,S_L,
|
|
p^.left^.location,
|
|
p^.location.register)));
|
|
end;
|
|
exprasmlist^.concat(new(pai68k,op_reg(A_NOT,S_L,p^.location.register)));}
|
|
|
|
end;
|
|
end;
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.4 1998-12-11 00:03:05 peter
|
|
+ globtype,tokens,version unit splitted from globals
|
|
|
|
Revision 1.3 1998/10/13 16:50:10 pierre
|
|
* undid some changes of Peter that made the compiler wrong
|
|
for m68k (I had to reinsert some ifdefs)
|
|
* removed several memory leaks under m68k
|
|
* removed the meory leaks for assembler readers
|
|
* cross compiling shoud work again better
|
|
( crosscompiling sysamiga works
|
|
but as68k still complain about some code !)
|
|
|
|
Revision 1.2 1998/09/14 10:44:01 peter
|
|
* all internal RTL functions start with FPC_
|
|
|
|
Revision 1.1 1998/09/01 09:07:09 peter
|
|
* m68k fixes, splitted cg68k like cgi386
|
|
|
|
}
|