fpc/compiler/cg386add.pas
1998-10-20 15:09:21 +00:00

1406 lines
64 KiB
ObjectPascal

{
$Id$
Copyright (c) 1993-98 by Florian Klaempfl
Generate i386 assembler for in add node
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 cg386add;
interface
uses
tree;
procedure secondadd(var p : ptree);
implementation
uses
cobjects,verbose,globals,systems,
symtable,aasm,types,
hcodegen,temp_gen,pass_2,
i386,cgai386,tgeni386;
{*****************************************************************************
Helpers
*****************************************************************************}
procedure SetResultLocation(cmpop,unsigned:boolean;var p :ptree);
var
flags : tresflags;
begin
{ remove temporary location if not a set or string }
{ that's a bad hack (FK) who did this ? }
if (p^.left^.resulttype^.deftype<>stringdef) and
((p^.left^.resulttype^.deftype<>setdef) or (psetdef(p^.left^.resulttype)^.settype=smallset)) and
(p^.left^.location.loc in [LOC_MEM,LOC_REFERENCE]) then
ungetiftemp(p^.left^.location.reference);
if (p^.right^.resulttype^.deftype<>stringdef) and
((p^.right^.resulttype^.deftype<>setdef) or (psetdef(p^.right^.resulttype)^.settype=smallset)) and
(p^.right^.location.loc in [LOC_MEM,LOC_REFERENCE]) then
ungetiftemp(p^.right^.location.reference);
{ in case of comparison operation the put result in the flags }
if cmpop then
begin
if not(unsigned) then
begin
if p^.swaped then
case p^.treetype of
equaln : flags:=F_E;
unequaln : flags:=F_NE;
ltn : flags:=F_G;
lten : flags:=F_GE;
gtn : flags:=F_L;
gten : flags:=F_LE;
end
else
case p^.treetype of
equaln : flags:=F_E;
unequaln : flags:=F_NE;
ltn : flags:=F_L;
lten : flags:=F_LE;
gtn : flags:=F_G;
gten : flags:=F_GE;
end;
end
else
begin
if p^.swaped then
case p^.treetype of
equaln : flags:=F_E;
unequaln : flags:=F_NE;
ltn : flags:=F_A;
lten : flags:=F_AE;
gtn : flags:=F_B;
gten : flags:=F_BE;
end
else
case p^.treetype of
equaln : flags:=F_E;
unequaln : flags:=F_NE;
ltn : flags:=F_B;
lten : flags:=F_BE;
gtn : flags:=F_A;
gten : flags:=F_AE;
end;
end;
clear_location(p^.location);
p^.location.loc:=LOC_FLAGS;
p^.location.resflags:=flags;
end;
end;
{*****************************************************************************
Addstring
*****************************************************************************}
procedure addstring(var p : ptree);
var
pushedregs : tpushed;
href : treference;
pushed,
cmpop : boolean;
begin
{ string operations are not commutative }
if p^.swaped then
swaptree(p);
case pstringdef(p^.left^.resulttype)^.string_typ of
st_ansistring:
begin
case p^.treetype of
addn:
begin
{ we do not need destination anymore }
del_reference(p^.left^.location.reference);
del_reference(p^.right^.location.reference);
{ concatansistring(p); }
end;
ltn,lten,gtn,gten,
equaln,unequaln:
begin
secondpass(p^.left);
pushed:=maybe_push(p^.right^.registers32,p);
secondpass(p^.right);
if pushed then restore(p);
{ release used registers }
case p^.right^.location.loc of
LOC_REFERENCE,LOC_MEM:
del_reference(p^.right^.location.reference);
LOC_REGISTER,LOC_CREGISTER:
ungetregister32(p^.right^.location.register);
end;
case p^.left^.location.loc of
LOC_REFERENCE,LOC_MEM:
del_reference(p^.left^.location.reference);
LOC_REGISTER,LOC_CREGISTER:
ungetregister32(p^.left^.location.register);
end;
{ push the still used registers }
pushusedregisters(pushedregs,$ff);
{ push data }
case p^.right^.location.loc of
LOC_REFERENCE,LOC_MEM:
emit_push_mem(p^.right^.location.reference);
LOC_REGISTER,LOC_CREGISTER:
exprasmlist^.concat(new(pai386,op_reg(A_PUSH,S_L,p^.right^.location.register)));
end;
case p^.left^.location.loc of
LOC_REFERENCE,LOC_MEM:
emit_push_mem(p^.left^.location.reference);
LOC_REGISTER,LOC_CREGISTER:
exprasmlist^.concat(new(pai386,op_reg(A_PUSH,S_L,p^.left^.location.register)));
end;
emitcall('FPC_ANSICOMPARE',true);
emit_reg_reg(A_OR,S_L,R_EAX,R_EAX);
popusedregisters(pushedregs);
maybe_loadesi;
ungetiftemp(p^.left^.location.reference);
ungetiftemp(p^.right^.location.reference);
end;
end;
end;
st_shortstring:
begin
case p^.treetype of
addn:
begin
cmpop:=false;
secondpass(p^.left);
{ if str_concat is set in expr
s:=s+ ... no need to create a temp string (PM) }
if (p^.left^.treetype<>addn) and not (p^.use_strconcat) then
begin
{ can only reference be }
{ string in register would be funny }
{ therefore produce a temporary string }
{ release the registers }
del_reference(p^.left^.location.reference);
gettempofsizereference(256,href);
copystring(href,p^.left^.location.reference,255);
ungetiftemp(p^.left^.location.reference);
{ does not hurt: }
clear_location(p^.left^.location);
p^.left^.location.loc:=LOC_MEM;
p^.left^.location.reference:=href;
end;
secondpass(p^.right);
{ on the right we do not need the register anymore too }
del_reference(p^.right^.location.reference);
{
if p^.right^.resulttype^.deftype=orddef then
begin
pushusedregisters(pushedregs,$ff);
exprasmlist^.concat(new(pai386,op_ref_reg(
A_LEA,S_L,newreference(p^.left^.location.reference),R_EDI)));
exprasmlist^.concat(new(pai386,op_reg_reg(
A_XOR,S_L,R_EBX,R_EBX)));
reset_reference(href);
href.base:=R_EDI;
exprasmlist^.concat(new(pai386,op_ref_reg(
A_MOV,S_B,newreference(href),R_BL)));
exprasmlist^.concat(new(pai386,op_reg(
A_INC,S_L,R_EBX)));
exprasmlist^.concat(new(pai386,op_reg_ref(
A_MOV,S_B,R_BL,newreference(href))));
href.index:=R_EBX;
if p^.right^.treetype=ordconstn then
exprasmlist^.concat(new(pai386,op_const_ref(
A_MOV,S_L,p^.right^.value,newreference(href))))
else
begin
if p^.right^.location.loc in [LOC_CREGISTER,LOC_REGISTER] then
exprasmlist^.concat(new(pai386,op_reg_ref(
A_MOV,S_B,p^.right^.location.register,newreference(href))))
else
begin
exprasmlist^.concat(new(pai386,op_ref_reg(
A_MOV,S_L,newreference(p^.right^.location.reference),R_EAX)));
exprasmlist^.concat(new(pai386,op_reg_ref(
A_MOV,S_B,R_AL,newreference(href))));
end;
end;
popusedregisters(pushedregs);
end
else }
begin
pushusedregisters(pushedregs,$ff);
emitpushreferenceaddr(exprasmlist,p^.left^.location.reference);
emitpushreferenceaddr(exprasmlist,p^.right^.location.reference);
emitcall('FPC_STRCONCAT',true);
maybe_loadesi;
popusedregisters(pushedregs);
end;
set_location(p^.location,p^.left^.location);
ungetiftemp(p^.right^.location.reference);
end;
ltn,lten,gtn,gten,
equaln,unequaln :
begin
cmpop:=true;
{ generate better code for s='' and s<>'' }
if (p^.treetype in [equaln,unequaln]) and
(((p^.left^.treetype=stringconstn) and (str_length(p^.left)=0)) or
((p^.right^.treetype=stringconstn) and (str_length(p^.right)=0))) then
begin
secondpass(p^.left);
{ are too few registers free? }
pushed:=maybe_push(p^.right^.registers32,p);
secondpass(p^.right);
if pushed then restore(p);
del_reference(p^.right^.location.reference);
del_reference(p^.left^.location.reference);
{ only one node can be stringconstn }
{ else pass 1 would have evaluted }
{ this node }
if p^.left^.treetype=stringconstn then
exprasmlist^.concat(new(pai386,op_const_ref(
A_CMP,S_B,0,newreference(p^.right^.location.reference))))
else
exprasmlist^.concat(new(pai386,op_const_ref(
A_CMP,S_B,0,newreference(p^.left^.location.reference))));
end
else
begin
pushusedregisters(pushedregs,$ff);
secondpass(p^.left);
del_reference(p^.left^.location.reference);
emitpushreferenceaddr(exprasmlist,p^.left^.location.reference);
secondpass(p^.right);
del_reference(p^.right^.location.reference);
emitpushreferenceaddr(exprasmlist,p^.right^.location.reference);
emitcall('FPC_STRCMP',true);
maybe_loadesi;
popusedregisters(pushedregs);
end;
ungetiftemp(p^.left^.location.reference);
ungetiftemp(p^.right^.location.reference);
end;
else CGMessage(type_e_mismatch);
end;
end;
end;
SetResultLocation(cmpop,true,p);
end;
{*****************************************************************************
Addset
*****************************************************************************}
procedure addset(var p : ptree);
var
cmpop,
pushed : boolean;
href : treference;
pushedregs : tpushed;
begin
cmpop:=false;
{ not commutative }
if p^.swaped then
swaptree(p);
secondpass(p^.left);
{ are too few registers free? }
pushed:=maybe_push(p^.right^.registers32,p);
secondpass(p^.right);
if codegenerror then
exit;
if pushed then
restore(p);
set_location(p^.location,p^.left^.location);
{ handle operations }
case p^.treetype of
equaln,
unequaln : begin
cmpop:=true;
del_reference(p^.left^.location.reference);
del_reference(p^.right^.location.reference);
pushusedregisters(pushedregs,$ff);
emitpushreferenceaddr(exprasmlist,p^.right^.location.reference);
emitpushreferenceaddr(exprasmlist,p^.left^.location.reference);
emitcall('FPC_SET_COMP_SETS',true);
maybe_loadesi;
popusedregisters(pushedregs);
ungetiftemp(p^.left^.location.reference);
ungetiftemp(p^.right^.location.reference);
end;
addn : begin
{ add can be an other SET or Range or Element ! }
del_reference(p^.left^.location.reference);
del_reference(p^.right^.location.reference);
pushusedregisters(pushedregs,$ff);
href.symbol:=nil;
gettempofsizereference(32,href);
{ add a range or a single element? }
if p^.right^.treetype=setelementn then
begin
concatcopy(p^.left^.location.reference,href,32,false);
if assigned(p^.right^.right) then
begin
pushsetelement(p^.right^.right);
pushsetelement(p^.right^.left);
emitpushreferenceaddr(exprasmlist,href);
emitcall('FPC_SET_SET_RANGE',true);
end
else
begin
pushsetelement(p^.right^.left);
emitpushreferenceaddr(exprasmlist,href);
emitcall('FPC_SET_SET_BYTE',true);
end;
end
else
begin
{ must be an other set }
emitpushreferenceaddr(exprasmlist,href);
emitpushreferenceaddr(exprasmlist,p^.right^.location.reference);
emitpushreferenceaddr(exprasmlist,p^.left^.location.reference);
emitcall('FPC_SET_ADD_SETS',true);
end;
maybe_loadesi;
popusedregisters(pushedregs);
ungetiftemp(p^.left^.location.reference);
ungetiftemp(p^.right^.location.reference);
p^.location.loc:=LOC_MEM;
stringdispose(p^.location.reference.symbol);
p^.location.reference:=href;
end;
subn,
symdifn,
muln : begin
del_reference(p^.left^.location.reference);
del_reference(p^.right^.location.reference);
href.symbol:=nil;
pushusedregisters(pushedregs,$ff);
gettempofsizereference(32,href);
emitpushreferenceaddr(exprasmlist,href);
emitpushreferenceaddr(exprasmlist,p^.right^.location.reference);
emitpushreferenceaddr(exprasmlist,p^.left^.location.reference);
case p^.treetype of
subn : emitcall('FPC_SET_SUB_SETS',true);
symdifn : emitcall('FPC_SET_SYMDIF_SETS',true);
muln : emitcall('FPC_SET_MUL_SETS',true);
end;
maybe_loadesi;
popusedregisters(pushedregs);
ungetiftemp(p^.left^.location.reference);
ungetiftemp(p^.right^.location.reference);
p^.location.loc:=LOC_MEM;
stringdispose(p^.location.reference.symbol);
p^.location.reference:=href;
end;
else
CGMessage(type_e_mismatch);
end;
SetResultLocation(cmpop,true,p);
end;
{*****************************************************************************
SecondAdd
*****************************************************************************}
procedure secondadd(var p : ptree);
{ is also being used for xor, and "mul", "sub, or and comparative }
{ operators }
label do_normal;
var
hregister : tregister;
noswap,
pushed,mboverflow,cmpop : boolean;
op : tasmop;
flags : tresflags;
otl,ofl : plabel;
power : longint;
opsize : topsize;
hl4: plabel;
{ true, if unsigned types are compared }
unsigned : boolean;
{ true, if a small set is handled with the longint code }
is_set : boolean;
{ is_in_dest if the result is put directly into }
{ the resulting refernce or varregister }
is_in_dest : boolean;
{ true, if for sets subtractions the extra not should generated }
extra_not : boolean;
{$ifdef SUPPORT_MMX}
mmxbase : tmmxtype;
{$endif SUPPORT_MMX}
begin
{ to make it more readable, string and set (not smallset!) have their
own procedures }
case p^.left^.resulttype^.deftype of
stringdef : begin
addstring(p);
exit;
end;
setdef : begin
{ normalsets are handled separate }
if not(psetdef(p^.left^.resulttype)^.settype=smallset) then
begin
addset(p);
exit;
end;
end;
end;
{ defaults }
unsigned:=false;
is_in_dest:=false;
extra_not:=false;
noswap:=false;
opsize:=S_L;
{ are we a (small)set, must be set here because the side can be
swapped ! (PFV) }
is_set:=(p^.left^.resulttype^.deftype=setdef);
{ calculate the operator which is more difficult }
firstcomplex(p);
{ handling boolean expressions extra: }
if ((p^.left^.resulttype^.deftype=orddef) and
(porddef(p^.left^.resulttype)^.typ in [bool8bit,bool16bit,bool32bit])) or
((p^.right^.resulttype^.deftype=orddef) and
(porddef(p^.right^.resulttype)^.typ in [bool8bit,bool16bit,bool32bit])) then
begin
if (porddef(p^.left^.resulttype)^.typ=bool8bit) or
(porddef(p^.right^.resulttype)^.typ=bool8bit) then
opsize:=S_B
else
if (porddef(p^.left^.resulttype)^.typ=bool16bit) or
(porddef(p^.right^.resulttype)^.typ=bool16bit) then
opsize:=S_W
else
opsize:=S_L;
case p^.treetype of
andn,
orn : begin
clear_location(p^.location);
p^.location.loc:=LOC_JUMP;
cmpop:=false;
case p^.treetype of
andn : begin
otl:=truelabel;
getlabel(truelabel);
secondpass(p^.left);
maketojumpbool(p^.left);
emitl(A_LABEL,truelabel);
truelabel:=otl;
end;
orn : begin
ofl:=falselabel;
getlabel(falselabel);
secondpass(p^.left);
maketojumpbool(p^.left);
emitl(A_LABEL,falselabel);
falselabel:=ofl;
end;
else
CGMessage(type_e_mismatch);
end;
secondpass(p^.right);
maketojumpbool(p^.right);
end;
unequaln,
equaln,xorn : begin
if p^.left^.treetype=ordconstn then
swaptree(p);
secondpass(p^.left);
set_location(p^.location,p^.left^.location);
{p^.location:=p^.left^.location;
created a bug !!! PM
because symbol was used twice }
{ are enough registers free ? }
pushed:=maybe_push(p^.right^.registers32,p);
secondpass(p^.right);
if pushed then restore(p);
goto do_normal;
end
else
CGMessage(type_e_mismatch);
end
end
else
begin
{ in case of constant put it to the left }
if (p^.left^.treetype=ordconstn) then
swaptree(p);
secondpass(p^.left);
{ this will be complicated as
a lot of code below assumes that
p^.location and p^.left^.location are the same }
{$ifdef test_dest_loc}
if dest_loc_known and (dest_loc_tree=p) and
((dest_loc.loc=LOC_REGISTER) or (dest_loc.loc=LOC_CREGISTER)) then
begin
set_location(p^.location,dest_loc);
in_dest_loc:=true;
is_in_dest:=true;
end
else
{$endif test_dest_loc}
set_location(p^.location,p^.left^.location);
{ are too few registers free? }
pushed:=maybe_push(p^.right^.registers32,p);
secondpass(p^.right);
if pushed then
restore(p);
if (p^.left^.resulttype^.deftype=pointerdef) or
(p^.right^.resulttype^.deftype=pointerdef) or
((p^.right^.resulttype^.deftype=objectdef) and
pobjectdef(p^.right^.resulttype)^.isclass and
(p^.left^.resulttype^.deftype=objectdef) and
pobjectdef(p^.left^.resulttype)^.isclass
) or
(p^.left^.resulttype^.deftype=classrefdef) or
(p^.left^.resulttype^.deftype=procvardef) or
(p^.left^.resulttype^.deftype=enumdef) or
((p^.left^.resulttype^.deftype=orddef) and
(porddef(p^.left^.resulttype)^.typ=s32bit)) or
((p^.right^.resulttype^.deftype=orddef) and
(porddef(p^.right^.resulttype)^.typ=s32bit)) or
((p^.left^.resulttype^.deftype=orddef) and
(porddef(p^.left^.resulttype)^.typ=u32bit)) or
((p^.right^.resulttype^.deftype=orddef) and
(porddef(p^.right^.resulttype)^.typ=u32bit)) or
{ as well as small sets }
is_set then
begin
do_normal:
mboverflow:=false;
cmpop:=false;
if (p^.left^.resulttype^.deftype=pointerdef) or
(p^.right^.resulttype^.deftype=pointerdef) or
((p^.left^.resulttype^.deftype=orddef) and
(porddef(p^.left^.resulttype)^.typ=u32bit)) or
((p^.right^.resulttype^.deftype=orddef) and
(porddef(p^.right^.resulttype)^.typ=u32bit)) then
unsigned:=true;
case p^.treetype of
addn : begin
if is_set then
begin
{ adding elements is not commutative }
if p^.swaped and (p^.left^.treetype=setelementn) then
swaptree(p);
{ are we adding set elements ? }
if p^.right^.treetype=setelementn then
begin
{ no range support for smallsets! }
if assigned(p^.right^.right) then
internalerror(43244);
{ bts requires both elements to be registers }
if p^.left^.location.loc in [LOC_MEM,LOC_REFERENCE] then
begin
del_reference(p^.left^.location.reference);
hregister:=getregister32;
exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,opsize,
newreference(p^.left^.location.reference),hregister)));
clear_location(p^.left^.location);
p^.left^.location.loc:=LOC_REGISTER;
p^.left^.location.register:=hregister;
set_location(p^.location,p^.left^.location);
end;
if p^.right^.location.loc in [LOC_MEM,LOC_REFERENCE] then
begin
del_reference(p^.right^.location.reference);
hregister:=getregister32;
exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,opsize,
newreference(p^.right^.location.reference),hregister)));
clear_location(p^.right^.location);
p^.right^.location.loc:=LOC_REGISTER;
p^.right^.location.register:=hregister;
end;
op:=A_BTS;
noswap:=true;
end
else
op:=A_OR;
mboverflow:=false;
unsigned:=false;
end
else
begin
op:=A_ADD;
mboverflow:=true;
end;
end;
symdifn : begin
{ the symetric diff is only for sets }
if is_set then
begin
op:=A_XOR;
mboverflow:=false;
unsigned:=false;
end
else
CGMessage(type_e_mismatch);
end;
muln : begin
if is_set then
begin
op:=A_AND;
mboverflow:=false;
unsigned:=false;
end
else
begin
if unsigned then
op:=A_MUL
else
op:=A_IMUL;
mboverflow:=true;
end;
end;
subn : begin
if is_set then
begin
op:=A_AND;
mboverflow:=false;
unsigned:=false;
extra_not:=true;
end
else
begin
op:=A_SUB;
mboverflow:=true;
end;
end;
ltn,lten,
gtn,gten,
equaln,unequaln : begin
op:=A_CMP;
cmpop:=true;
end;
xorn : op:=A_XOR;
orn : op:=A_OR;
andn : op:=A_AND;
else
CGMessage(type_e_mismatch);
end;
{ left and right no register? }
{ then one must be demanded }
if (p^.left^.location.loc<>LOC_REGISTER) and
(p^.right^.location.loc<>LOC_REGISTER) then
begin
{ register variable ? }
if (p^.left^.location.loc=LOC_CREGISTER) then
begin
{ it is OK if this is the destination }
if is_in_dest then
begin
hregister:=p^.location.register;
emit_reg_reg(A_MOV,opsize,p^.left^.location.register,
hregister);
end
else
if cmpop then
begin
{ do not disturb the register }
hregister:=p^.location.register;
end
else
begin
case opsize of
S_L : hregister:=getregister32;
S_B : hregister:=reg32toreg8(getregister32);
end;
emit_reg_reg(A_MOV,opsize,p^.left^.location.register,
hregister);
end
end
else
begin
del_reference(p^.left^.location.reference);
if is_in_dest then
begin
hregister:=p^.location.register;
exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,opsize,
newreference(p^.left^.location.reference),hregister)));
end
else
begin
{ first give free, then demand new register }
case opsize of
S_L : hregister:=getregister32;
S_W : hregister:=reg32toreg16(getregister32);
S_B : hregister:=reg32toreg8(getregister32);
end;
exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,opsize,
newreference(p^.left^.location.reference),hregister)));
end;
end;
clear_location(p^.location);
p^.location.loc:=LOC_REGISTER;
p^.location.register:=hregister;
end
else
{ if on the right the register then swap }
if not(noswap) and (p^.right^.location.loc=LOC_REGISTER) then
begin
swap_location(p^.location,p^.right^.location);
{ newly swapped also set swapped flag }
p^.swaped:=not(p^.swaped);
end;
{ at this point, p^.location.loc should be LOC_REGISTER }
{ and p^.location.register should be a valid register }
{ containing the left result }
if p^.right^.location.loc<>LOC_REGISTER then
begin
if (p^.treetype=subn) and p^.swaped then
begin
if p^.right^.location.loc=LOC_CREGISTER then
begin
if extra_not then
exprasmlist^.concat(new(pai386,op_reg(A_NOT,opsize,p^.location.register)));
emit_reg_reg(A_MOV,opsize,p^.right^.location.register,R_EDI);
emit_reg_reg(op,opsize,p^.location.register,R_EDI);
emit_reg_reg(A_MOV,opsize,R_EDI,p^.location.register);
end
else
begin
if extra_not then
exprasmlist^.concat(new(pai386,op_reg(A_NOT,opsize,p^.location.register)));
exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,opsize,
newreference(p^.right^.location.reference),R_EDI)));
exprasmlist^.concat(new(pai386,op_reg_reg(op,opsize,p^.location.register,R_EDI)));
exprasmlist^.concat(new(pai386,op_reg_reg(A_MOV,opsize,R_EDI,p^.location.register)));
del_reference(p^.right^.location.reference);
end;
end
else
begin
if (p^.right^.treetype=ordconstn) and
(op=A_CMP) and
(p^.right^.value=0) then
begin
exprasmlist^.concat(new(pai386,op_reg_reg(A_TEST,opsize,p^.location.register,
p^.location.register)));
end
else if (p^.right^.treetype=ordconstn) and
(op=A_ADD) and
(p^.right^.value=1) then
begin
exprasmlist^.concat(new(pai386,op_reg(A_INC,opsize,
p^.location.register)));
end
else if (p^.right^.treetype=ordconstn) and
(op=A_SUB) and
(p^.right^.value=1) then
begin
exprasmlist^.concat(new(pai386,op_reg(A_DEC,opsize,
p^.location.register)));
end
else if (p^.right^.treetype=ordconstn) and
(op=A_IMUL) and
(ispowerof2(p^.right^.value,power)) then
begin
exprasmlist^.concat(new(pai386,op_const_reg(A_SHL,opsize,power,
p^.location.register)));
end
else
begin
if (p^.right^.location.loc=LOC_CREGISTER) then
begin
if extra_not then
begin
emit_reg_reg(A_MOV,S_L,p^.right^.location.register,R_EDI);
exprasmlist^.concat(new(pai386,op_reg(A_NOT,S_L,R_EDI)));
emit_reg_reg(A_AND,S_L,R_EDI,
p^.location.register);
end
else
begin
emit_reg_reg(op,opsize,p^.right^.location.register,
p^.location.register);
end;
end
else
begin
if extra_not then
begin
exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,S_L,newreference(
p^.right^.location.reference),R_EDI)));
exprasmlist^.concat(new(pai386,op_reg(A_NOT,S_L,R_EDI)));
emit_reg_reg(A_AND,S_L,R_EDI,
p^.location.register);
end
else
begin
exprasmlist^.concat(new(pai386,op_ref_reg(op,opsize,newreference(
p^.right^.location.reference),p^.location.register)));
end;
del_reference(p^.right^.location.reference);
end;
end;
end;
end
else
begin
{ when swapped another result register }
if (p^.treetype=subn) and p^.swaped then
begin
if extra_not then
exprasmlist^.concat(new(pai386,op_reg(A_NOT,S_L,p^.location.register)));
exprasmlist^.concat(new(pai386,op_reg_reg(op,opsize,
p^.location.register,p^.right^.location.register)));
swap_location(p^.location,p^.right^.location);
{ newly swapped also set swapped flag }
{ just to maintain ordering }
p^.swaped:=not(p^.swaped);
end
else
begin
if extra_not then
exprasmlist^.concat(new(pai386,op_reg(A_NOT,S_L,p^.right^.location.register)));
exprasmlist^.concat(new(pai386,op_reg_reg(op,opsize,
p^.right^.location.register,
p^.location.register)));
end;
case opsize of
S_L : ungetregister32(p^.right^.location.register);
S_B : ungetregister32(reg8toreg32(p^.right^.location.register));
end;
end;
if cmpop then
case opsize of
S_L : ungetregister32(p^.location.register);
S_B : ungetregister32(reg8toreg32(p^.location.register));
end;
{ only in case of overflow operations }
{ produce overflow code }
{ we must put it here directly, because sign of operation }
{ is in unsigned VAR!! }
if mboverflow then
begin
if cs_check_overflow in aktlocalswitches then
begin
getlabel(hl4);
if unsigned then
emitl(A_JNB,hl4)
else
emitl(A_JNO,hl4);
emitcall('FPC_OVERFLOW',true);
emitl(A_LABEL,hl4);
end;
end;
end
else
{ Char type }
if ((p^.left^.resulttype^.deftype=orddef) and
(porddef(p^.left^.resulttype)^.typ=uchar)) then
begin
case p^.treetype of
ltn,lten,gtn,gten,
equaln,unequaln :
cmpop:=true;
else CGMessage(type_e_mismatch);
end;
unsigned:=true;
{ left and right no register? }
{ the one must be demanded }
if (p^.location.loc<>LOC_REGISTER) and
(p^.right^.location.loc<>LOC_REGISTER) then
begin
if p^.location.loc=LOC_CREGISTER then
begin
if cmpop then
{ do not disturb register }
hregister:=p^.location.register
else
begin
hregister:=reg32toreg8(getregister32);
emit_reg_reg(A_MOV,S_B,p^.location.register,
hregister);
end;
end
else
begin
del_reference(p^.location.reference);
{ first give free then demand new register }
hregister:=reg32toreg8(getregister32);
exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,S_B,newreference(p^.location.reference),
hregister)));
end;
clear_location(p^.location);
p^.location.loc:=LOC_REGISTER;
p^.location.register:=hregister;
end;
{ now p always a register }
if (p^.right^.location.loc=LOC_REGISTER) and
(p^.location.loc<>LOC_REGISTER) then
begin
swap_location(p^.location,p^.right^.location);
{ newly swapped also set swapped flag }
p^.swaped:=not(p^.swaped);
end;
if p^.right^.location.loc<>LOC_REGISTER then
begin
if p^.right^.location.loc=LOC_CREGISTER then
begin
emit_reg_reg(A_CMP,S_B,
p^.right^.location.register,p^.location.register);
end
else
begin
exprasmlist^.concat(new(pai386,op_ref_reg(A_CMP,S_B,newreference(
p^.right^.location.reference),p^.location.register)));
del_reference(p^.right^.location.reference);
end;
end
else
begin
emit_reg_reg(A_CMP,S_B,p^.right^.location.register,
p^.location.register);
ungetregister32(reg8toreg32(p^.right^.location.register));
end;
ungetregister32(reg8toreg32(p^.location.register));
end
else
{ Floating point }
if (p^.left^.resulttype^.deftype=floatdef) and
(pfloatdef(p^.left^.resulttype)^.typ<>f32bit) then
begin
{ real constants to the left }
if p^.left^.treetype=realconstn then
swaptree(p);
cmpop:=false;
case p^.treetype of
addn : op:=A_FADDP;
muln : op:=A_FMULP;
subn : op:=A_FSUBP;
slashn : op:=A_FDIVP;
ltn,lten,gtn,gten,
equaln,unequaln : begin
op:=A_FCOMPP;
cmpop:=true;
end;
else CGMessage(type_e_mismatch);
end;
if (p^.right^.location.loc<>LOC_FPU) then
begin
floatload(pfloatdef(p^.right^.resulttype)^.typ,p^.right^.location.reference);
if (p^.left^.location.loc<>LOC_FPU) then
floatload(pfloatdef(p^.left^.resulttype)^.typ,p^.left^.location.reference)
{ left was on the stack => swap }
else
p^.swaped:=not(p^.swaped);
{ releases the right reference }
del_reference(p^.right^.location.reference);
end
{ the nominator in st0 }
else if (p^.left^.location.loc<>LOC_FPU) then
floatload(pfloatdef(p^.left^.resulttype)^.typ,p^.left^.location.reference)
{ fpu operands are always in the wrong order on the stack }
else
p^.swaped:=not(p^.swaped);
{ releases the left reference }
if (p^.left^.location.loc<>LOC_FPU) then
del_reference(p^.left^.location.reference);
{ if we swaped the tree nodes, then use the reverse operator }
if p^.swaped then
begin
if (p^.treetype=slashn) then
op:=A_FDIVRP
else if (p^.treetype=subn) then
op:=A_FSUBRP;
end;
{ to avoid the pentium bug
if (op=FDIVP) and (opt_processors=pentium) then
exprasmlist^.concat(new(pai386,op_CALL,S_NO,'EMUL_FDIVP')
else
}
{ the Intel assemblers want operands }
if op<>A_FCOMPP then
exprasmlist^.concat(new(pai386,op_reg_reg(op,S_NO,R_ST,R_ST1)))
else
exprasmlist^.concat(new(pai386,op_none(op,S_NO)));
{ on comparison load flags }
if cmpop then
begin
if not(R_EAX in unused) then
emit_reg_reg(A_MOV,S_L,R_EAX,R_EDI);
exprasmlist^.concat(new(pai386,op_reg(A_FNSTSW,S_NO,R_AX)));
exprasmlist^.concat(new(pai386,op_none(A_SAHF,S_NO)));
if not(R_EAX in unused) then
emit_reg_reg(A_MOV,S_L,R_EDI,R_EAX);
if p^.swaped then
begin
case p^.treetype of
equaln : flags:=F_E;
unequaln : flags:=F_NE;
ltn : flags:=F_A;
lten : flags:=F_AE;
gtn : flags:=F_B;
gten : flags:=F_BE;
end;
end
else
begin
case p^.treetype of
equaln : flags:=F_E;
unequaln : flags:=F_NE;
ltn : flags:=F_B;
lten : flags:=F_BE;
gtn : flags:=F_A;
gten : flags:=F_AE;
end;
end;
clear_location(p^.location);
p^.location.loc:=LOC_FLAGS;
p^.location.resflags:=flags;
cmpop:=false;
end
else
begin
clear_location(p^.location);
p^.location.loc:=LOC_FPU;
end;
end
{$ifdef SUPPORT_MMX}
else
{ MMX Arrays }
if is_mmx_able_array(p^.left^.resulttype) then
begin
cmpop:=false;
mmxbase:=mmx_type(p^.left^.resulttype);
case p^.treetype of
addn : begin
if (cs_mmx_saturation in aktlocalswitches) then
begin
case mmxbase of
mmxs8bit:
op:=A_PADDSB;
mmxu8bit:
op:=A_PADDUSB;
mmxs16bit,mmxfixed16:
op:=A_PADDSB;
mmxu16bit:
op:=A_PADDUSW;
end;
end
else
begin
case mmxbase of
mmxs8bit,mmxu8bit:
op:=A_PADDB;
mmxs16bit,mmxu16bit,mmxfixed16:
op:=A_PADDW;
mmxs32bit,mmxu32bit:
op:=A_PADDD;
end;
end;
end;
muln : begin
case mmxbase of
mmxs16bit,mmxu16bit:
op:=A_PMULLW;
mmxfixed16:
op:=A_PMULHW;
end;
end;
subn : begin
if (cs_mmx_saturation in aktlocalswitches) then
begin
case mmxbase of
mmxs8bit:
op:=A_PSUBSB;
mmxu8bit:
op:=A_PSUBUSB;
mmxs16bit,mmxfixed16:
op:=A_PSUBSB;
mmxu16bit:
op:=A_PSUBUSW;
end;
end
else
begin
case mmxbase of
mmxs8bit,mmxu8bit:
op:=A_PSUBB;
mmxs16bit,mmxu16bit,mmxfixed16:
op:=A_PSUBW;
mmxs32bit,mmxu32bit:
op:=A_PSUBD;
end;
end;
end;
{
ltn,lten,gtn,gten,
equaln,unequaln :
begin
op:=A_CMP;
cmpop:=true;
end;
}
xorn:
op:=A_PXOR;
orn:
op:=A_POR;
andn:
op:=A_PAND;
else CGMessage(type_e_mismatch);
end;
{ left and right no register? }
{ then one must be demanded }
if (p^.left^.location.loc<>LOC_MMXREGISTER) and
(p^.right^.location.loc<>LOC_MMXREGISTER) then
begin
{ register variable ? }
if (p^.left^.location.loc=LOC_CMMXREGISTER) then
begin
{ it is OK if this is the destination }
if is_in_dest then
begin
hregister:=p^.location.register;
emit_reg_reg(A_MOVQ,S_NO,p^.left^.location.register,
hregister);
end
else
begin
hregister:=getregistermmx;
emit_reg_reg(A_MOVQ,S_NO,p^.left^.location.register,
hregister);
end
end
else
begin
del_reference(p^.left^.location.reference);
if is_in_dest then
begin
hregister:=p^.location.register;
exprasmlist^.concat(new(pai386,op_ref_reg(A_MOVQ,S_NO,
newreference(p^.left^.location.reference),hregister)));
end
else
begin
hregister:=getregistermmx;
exprasmlist^.concat(new(pai386,op_ref_reg(A_MOVQ,S_NO,
newreference(p^.left^.location.reference),hregister)));
end;
end;
clear_location(p^.location);
p^.location.loc:=LOC_MMXREGISTER;
p^.location.register:=hregister;
end
else
{ if on the right the register then swap }
if (p^.right^.location.loc=LOC_MMXREGISTER) then
begin
swap_location(p^.location,p^.right^.location);
{ newly swapped also set swapped flag }
p^.swaped:=not(p^.swaped);
end;
{ at this point, p^.location.loc should be LOC_MMXREGISTER }
{ and p^.location.register should be a valid register }
{ containing the left result }
if p^.right^.location.loc<>LOC_MMXREGISTER then
begin
if (p^.treetype=subn) and p^.swaped then
begin
if p^.right^.location.loc=LOC_CMMXREGISTER then
begin
emit_reg_reg(A_MOVQ,S_NO,p^.right^.location.register,R_MM7);
emit_reg_reg(op,S_NO,p^.location.register,R_EDI);
emit_reg_reg(A_MOVQ,S_NO,R_MM7,p^.location.register);
end
else
begin
exprasmlist^.concat(new(pai386,op_ref_reg(A_MOVQ,S_NO,
newreference(p^.right^.location.reference),R_MM7)));
exprasmlist^.concat(new(pai386,op_reg_reg(op,S_NO,p^.location.register,
R_MM7)));
exprasmlist^.concat(new(pai386,op_reg_reg(A_MOVQ,S_NO,
R_MM7,p^.location.register)));
del_reference(p^.right^.location.reference);
end;
end
else
begin
if (p^.right^.location.loc=LOC_CREGISTER) then
begin
emit_reg_reg(op,S_NO,p^.right^.location.register,
p^.location.register);
end
else
begin
exprasmlist^.concat(new(pai386,op_ref_reg(op,S_NO,newreference(
p^.right^.location.reference),p^.location.register)));
del_reference(p^.right^.location.reference);
end;
end;
end
else
begin
{ when swapped another result register }
if (p^.treetype=subn) and p^.swaped then
begin
exprasmlist^.concat(new(pai386,op_reg_reg(op,S_NO,
p^.location.register,p^.right^.location.register)));
swap_location(p^.location,p^.right^.location);
{ newly swapped also set swapped flag }
{ just to maintain ordering }
p^.swaped:=not(p^.swaped);
end
else
begin
exprasmlist^.concat(new(pai386,op_reg_reg(op,S_NO,
p^.right^.location.register,
p^.location.register)));
end;
ungetregistermmx(p^.right^.location.register);
end;
end
{$endif SUPPORT_MMX}
else CGMessage(type_e_mismatch);
end;
SetResultLocation(cmpop,unsigned,p);
end;
end.
{
$Log$
Revision 1.19 1998-10-20 15:09:21 florian
+ binary operators for ansi strings
Revision 1.18 1998/10/20 08:06:38 pierre
* several memory corruptions due to double freemem solved
=> never use p^.loc.location:=p^.left^.loc.location;
+ finally I added now by default
that ra386dir translates global and unit symbols
+ added a first field in tsymtable and
a nextsym field in tsym
(this allows to obtain ordered type info for
records and objects in gdb !)
Revision 1.17 1998/10/09 11:47:45 pierre
* still more memory leaks fixes !!
Revision 1.16 1998/10/09 08:56:21 pierre
* several memory leaks fixed
Revision 1.15 1998/10/08 17:17:10 pierre
* current_module old scanner tagged as invalid if unit is recompiled
+ added ppheap for better info on tracegetmem of heaptrc
(adds line column and file index)
* several memory leaks removed ith help of heaptrc !!
Revision 1.14 1998/09/28 16:57:13 pierre
* changed all length(p^.value_str^) into str_length(p)
to get it work with and without ansistrings
* changed sourcefiles field of tmodule to a pointer
Revision 1.13 1998/09/17 09:42:09 peter
+ pass_2 for cg386
* Message() -> CGMessage() for pass_1/pass_2
Revision 1.12 1998/09/14 10:43:44 peter
* all internal RTL functions start with FPC_
Revision 1.11 1998/09/07 18:45:52 peter
* update smartlinking, uses getdatalabel
* renamed ptree.value vars to value_str,value_real,value_set
Revision 1.10 1998/09/04 10:05:04 florian
* ugly fix for STRCAT, nevertheless it needs more fixing !!!!!!!
we need an new version of STRCAT which takes a length parameter
Revision 1.9 1998/09/04 08:41:36 peter
* updated some error CGMessages
Revision 1.8 1998/08/28 10:54:18 peter
* fixed smallset generation from elements, it has never worked before!
Revision 1.7 1998/08/19 14:56:59 peter
* forgot to removed some unused code in addset for set<>set
Revision 1.6 1998/08/18 09:24:35 pierre
* small warning position bug fixed
* support_mmx switches splitting was missing
* rhide error and warning output corrected
Revision 1.5 1998/08/14 18:18:37 peter
+ dynamic set contruction
* smallsets are now working (always longint size)
Revision 1.4 1998/08/10 14:49:42 peter
+ localswitches, moduleswitches, globalswitches splitting
Revision 1.3 1998/06/25 08:48:04 florian
* first version of rtti support
Revision 1.2 1998/06/08 13:13:28 pierre
+ temporary variables now in temp_gen.pas unit
because it is processor independent
* mppc68k.bat modified to undefine i386 and support_mmx
(which are defaults for i386)
Revision 1.1 1998/06/05 17:44:10 peter
* splitted cgi386
}