mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-04-30 23:13:40 +02:00
792 lines
25 KiB
ObjectPascal
792 lines
25 KiB
ObjectPascal
{
|
|
$Id$
|
|
Copyright (c) 1998-2000 by Florian Klaempfl
|
|
|
|
Generate assembler for nodes that influence the flow
|
|
|
|
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.
|
|
|
|
****************************************************************************
|
|
}
|
|
|
|
|
|
{ in sync with cg386flw rev 1.55 of the main branch }
|
|
|
|
unit cg386flw;
|
|
interface
|
|
|
|
uses
|
|
tree;
|
|
|
|
procedure second_while_repeatn(list: paasmoutput; var p : ptree);
|
|
procedure secondifn(list: paasmoutput; var p : ptree);
|
|
procedure secondfor(list: paasmoutput; var p : ptree);
|
|
procedure secondexitn(list: paasmoutput; var p : ptree);
|
|
procedure secondbreakn(list: paasmoutput; var p : ptree);
|
|
procedure secondcontinuen( list: paasmoutput; var p : ptree);
|
|
procedure secondgoto(list: paasmoutput; var p : ptree);
|
|
procedure secondlabel(list: paasmoutput; var p : ptree);
|
|
procedure secondraise(list: paasmoutput; var p : ptree);
|
|
procedure secondtryexcept(list: paasmoutput; var p : ptree);
|
|
procedure secondtryfinally(list: paasmoutput; var p : ptree);
|
|
procedure secondon(list: paasmoutput; var p : ptree);
|
|
procedure secondfail(list: paasmoutput; var p : ptree);
|
|
|
|
|
|
implementation
|
|
|
|
uses
|
|
cobjects,verbose,globtype,globals,systems,
|
|
symconst,symtable,aasm,types,
|
|
hcodegen,temp_gen,pass_2,
|
|
cpubase,cpuasm{,
|
|
cgai386,tgeni386}, cgcpu;
|
|
|
|
{*****************************************************************************
|
|
Second_While_RepeatN
|
|
*****************************************************************************}
|
|
|
|
procedure second_while_repeatn(list: paasmoutput; var p : ptree);
|
|
{ converted, problems left: }
|
|
{ * maketojumpbool }
|
|
var
|
|
lcont,lbreak,lloop,
|
|
oldclabel,oldblabel : pasmlabel;
|
|
otlabel,oflabel : pasmlabel;
|
|
|
|
begin
|
|
getlabel(lloop);
|
|
getlabel(lcont);
|
|
getlabel(lbreak);
|
|
{ arrange continue and breaklabels: }
|
|
oldclabel:=aktcontinuelabel;
|
|
oldblabel:=aktbreaklabel;
|
|
|
|
{ handling code at the end as it is much more efficient, and makes
|
|
while equal to repeat loop, only the end true/false is swapped (PFV) }
|
|
if p^.treetype=whilen then
|
|
a_jmp_cond(list,C_None,lcont);
|
|
|
|
a_label(list,lloop);
|
|
|
|
aktcontinuelabel:=lcont;
|
|
aktbreaklabel:=lbreak;
|
|
cleartempgen;
|
|
if assigned(p^.right) then
|
|
secondpass(list,p^.right);
|
|
a_label(list,lcont);
|
|
otlabel:=truelabel;
|
|
oflabel:=falselabel;
|
|
if p^.treetype=whilen then
|
|
begin
|
|
truelabel:=lloop;
|
|
falselabel:=lbreak;
|
|
end
|
|
{ repeatn }
|
|
else
|
|
begin
|
|
truelabel:=lbreak;
|
|
falselabel:=lloop;
|
|
end;
|
|
cleartempgen;
|
|
secondpass(list,p^.left);
|
|
{ has to be implemented processor dependently !!!! }
|
|
maketojumpbool(list, p^.left);
|
|
a_label(ist,lbreak);
|
|
freelabel(lloop);
|
|
freelabel(lcont);
|
|
freelabel(lbreak);
|
|
truelabel:=otlabel;
|
|
falselabel:=oflabel;
|
|
|
|
aktcontinuelabel:=oldclabel;
|
|
aktbreaklabel:=oldblabel;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondIfN
|
|
*****************************************************************************}
|
|
|
|
procedure secondifn(list: paasmoutput; var p : ptree);
|
|
{ converted, problems left: }
|
|
{ * maketojumpbool }
|
|
var
|
|
hl,otlabel,oflabel : pasmlabel;
|
|
|
|
begin
|
|
otlabel:=truelabel;
|
|
oflabel:=falselabel;
|
|
getlabel(truelabel);
|
|
getlabel(falselabel);
|
|
cleartempgen;
|
|
secondpass(list,p^.left);
|
|
maketojumpbool(list,p^.left);
|
|
if assigned(p^.right) then
|
|
begin
|
|
a_label(list, truelabel);
|
|
cleartempgen;
|
|
secondpass(list,p^.right);
|
|
end;
|
|
if assigned(p^.t1) then
|
|
begin
|
|
if assigned(p^.right) then
|
|
begin
|
|
getlabel(hl);
|
|
{ do go back to if line !! }
|
|
aktfilepos:=list^.getlasttaifilepos^;
|
|
a_jmp_cond(list,C_None,hl);
|
|
end;
|
|
a_label(list,falselabel);
|
|
cleartempgen;
|
|
secondpass(list,p^.t1);
|
|
if assigned(p^.right) then
|
|
a_label(list,hl);
|
|
end
|
|
else
|
|
begin
|
|
a_label(list,falselabel);
|
|
end;
|
|
if not(assigned(p^.right)) then
|
|
begin
|
|
a_label(list,truelabel);
|
|
end;
|
|
freelabel(truelabel);
|
|
freelabel(falselabel);
|
|
truelabel:=otlabel;
|
|
falselabel:=oflabel;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondFor
|
|
*****************************************************************************}
|
|
|
|
procedure secondfor(list: paasmoutput; var p : ptree);
|
|
{ still being converted, problems left: }
|
|
{ * getregister32 }
|
|
{ * size issues (" p^.t2^.resulttype^.size") }
|
|
|
|
var
|
|
l3,oldclabel,oldblabel : pasmlabel;
|
|
omitfirstcomp,temptovalue : boolean;
|
|
hs : byte;
|
|
temp1 : treference;
|
|
hop : tasmop;
|
|
hcond : tasmcond;
|
|
cmpreg,cmp32 : tregister;
|
|
opsize : topsize;
|
|
count_var_is_signed : boolean;
|
|
|
|
begin
|
|
oldclabel:=aktcontinuelabel;
|
|
oldblabel:=aktbreaklabel;
|
|
getlabel(aktcontinuelabel);
|
|
getlabel(aktbreaklabel);
|
|
getlabel(l3);
|
|
|
|
{ could we spare the first comparison ? }
|
|
omitfirstcomp:=false;
|
|
if p^.right^.treetype=ordconstn then
|
|
if p^.left^.right^.treetype=ordconstn then
|
|
omitfirstcomp:=(p^.backward and (p^.left^.right^.value>=p^.right^.value))
|
|
or (not(p^.backward) and (p^.left^.right^.value<=p^.right^.value));
|
|
|
|
{ only calculate reference }
|
|
cleartempgen;
|
|
secondpass(list,p^.t2);
|
|
hs:=p^.t2^.resulttype^.size;
|
|
cmp32:=getregister32;
|
|
case hs of
|
|
1 : begin
|
|
opsize:=S_B;
|
|
cmpreg:=reg32toreg8(cmp32);
|
|
end;
|
|
2 : begin
|
|
opsize:=S_W;
|
|
cmpreg:=reg32toreg16(cmp32);
|
|
end;
|
|
4 : begin
|
|
opsize:=S_L;
|
|
cmpreg:=cmp32;
|
|
end;
|
|
end;
|
|
|
|
{ first set the to value
|
|
because the count var can be in the expression !! }
|
|
cleartempgen;
|
|
secondpass(list,p^.right);
|
|
{ calculate pointer value and check if changeable and if so }
|
|
{ load into temporary variable }
|
|
if p^.right^.treetype<>ordconstn then
|
|
begin
|
|
temp1.symbol:=nil;
|
|
gettempofsizereference(hs,temp1);
|
|
temptovalue:=true;
|
|
if (p^.right^.location.loc=LOC_REGISTER) or
|
|
(p^.right^.location.loc=LOC_CREGISTER) then
|
|
begin
|
|
emit_reg_ref(A_MOV,opsize,p^.right^.location.register,
|
|
newreference(temp1));
|
|
end
|
|
else
|
|
concatcopy(p^.right^.location.reference,temp1,hs,false,false);
|
|
end
|
|
else
|
|
temptovalue:=false;
|
|
|
|
{ produce start assignment }
|
|
cleartempgen;
|
|
secondpass(p^.left);
|
|
count_var_is_signed:=is_signed(porddef(p^.t2^.resulttype));
|
|
if temptovalue then
|
|
begin
|
|
if p^.t2^.location.loc=LOC_CREGISTER then
|
|
begin
|
|
emit_ref_reg(A_CMP,opsize,newreference(temp1),
|
|
p^.t2^.location.register);
|
|
end
|
|
else
|
|
begin
|
|
emit_ref_reg(A_MOV,opsize,newreference(p^.t2^.location.reference),
|
|
cmpreg);
|
|
emit_ref_reg(A_CMP,opsize,newreference(temp1),
|
|
cmpreg);
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
if not(omitfirstcomp) then
|
|
begin
|
|
if p^.t2^.location.loc=LOC_CREGISTER then
|
|
emit_const_reg(A_CMP,opsize,p^.right^.value,
|
|
p^.t2^.location.register)
|
|
else
|
|
emit_const_ref(A_CMP,opsize,p^.right^.value,
|
|
newreference(p^.t2^.location.reference));
|
|
end;
|
|
end;
|
|
if p^.backward then
|
|
if count_var_is_signed then
|
|
hcond:=C_L
|
|
else
|
|
hcond:=C_B
|
|
else
|
|
if count_var_is_signed then
|
|
hcond:=C_G
|
|
else
|
|
hcond:=C_A;
|
|
|
|
if not(omitfirstcomp) or temptovalue then
|
|
emitjmp(hcond,aktbreaklabel);
|
|
|
|
{ align loop target }
|
|
if not(cs_littlesize in aktglobalswitches) then
|
|
exprasmlist^.concat(new(pai_align,init_op(4,$90)));
|
|
|
|
emitlab(l3);
|
|
|
|
{ help register must not be in instruction block }
|
|
cleartempgen;
|
|
if assigned(p^.t1) then
|
|
secondpass(p^.t1);
|
|
|
|
emitlab(aktcontinuelabel);
|
|
|
|
{ makes no problems there }
|
|
cleartempgen;
|
|
|
|
{ demand help register again }
|
|
cmp32:=getregister32;
|
|
case hs of
|
|
1 : begin
|
|
opsize:=S_B;
|
|
cmpreg:=reg32toreg8(cmp32);
|
|
end;
|
|
2 : begin
|
|
opsize:=S_W;
|
|
cmpreg:=reg32toreg16(cmp32);
|
|
end;
|
|
4 : opsize:=S_L;
|
|
end;
|
|
|
|
{ produce comparison and the corresponding }
|
|
{ jump }
|
|
if temptovalue then
|
|
begin
|
|
if p^.t2^.location.loc=LOC_CREGISTER then
|
|
begin
|
|
emit_ref_reg(A_CMP,opsize,newreference(temp1),
|
|
p^.t2^.location.register);
|
|
end
|
|
else
|
|
begin
|
|
emit_ref_reg(A_MOV,opsize,newreference(p^.t2^.location.reference),
|
|
cmpreg);
|
|
emit_ref_reg(A_CMP,opsize,newreference(temp1),
|
|
cmpreg);
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
if p^.t2^.location.loc=LOC_CREGISTER then
|
|
emit_const_reg(A_CMP,opsize,p^.right^.value,
|
|
p^.t2^.location.register)
|
|
else
|
|
emit_const_ref(A_CMP,opsize,p^.right^.value,
|
|
newreference(p^.t2^.location.reference));
|
|
end;
|
|
if p^.backward then
|
|
if count_var_is_signed then
|
|
hcond:=C_LE
|
|
else
|
|
hcond:=C_BE
|
|
else
|
|
if count_var_is_signed then
|
|
hcond:=C_GE
|
|
else
|
|
hcond:=C_AE;
|
|
emitjmp(hcond,aktbreaklabel);
|
|
{ according to count direction DEC or INC... }
|
|
{ must be after the test because of 0to 255 for bytes !! }
|
|
if p^.backward then
|
|
hop:=A_DEC
|
|
else
|
|
hop:=A_INC;
|
|
|
|
if p^.t2^.location.loc=LOC_CREGISTER then
|
|
emit_reg(hop,opsize,p^.t2^.location.register)
|
|
else
|
|
emit_ref(hop,opsize,newreference(p^.t2^.location.reference));
|
|
emitjmp(C_None,l3);
|
|
|
|
{ this is the break label: }
|
|
emitlab(aktbreaklabel);
|
|
ungetregister32(cmp32);
|
|
|
|
if temptovalue then
|
|
ungetiftemp(temp1);
|
|
|
|
freelabel(aktcontinuelabel);
|
|
freelabel(aktbreaklabel);
|
|
freelabel(l3);
|
|
aktcontinuelabel:=oldclabel;
|
|
aktbreaklabel:=oldblabel;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondExitN
|
|
*****************************************************************************}
|
|
|
|
procedure secondexitn(list: paasmoutput; var p : ptree);
|
|
var
|
|
is_mem : boolean;
|
|
{op : tasmop;
|
|
s : topsize;}
|
|
otlabel,oflabel : pasmlabel;
|
|
label
|
|
do_jmp;
|
|
begin
|
|
if assigned(p^.left) then
|
|
if p^.left^.treetype=assignn then
|
|
begin
|
|
{ just do a normal assignment followed by exit }
|
|
secondpass(p^.left);
|
|
emitjmp(C_None,aktexitlabel);
|
|
end
|
|
else
|
|
begin
|
|
otlabel:=truelabel;
|
|
oflabel:=falselabel;
|
|
getlabel(truelabel);
|
|
getlabel(falselabel);
|
|
secondpass(p^.left);
|
|
case p^.left^.location.loc of
|
|
LOC_FPU : goto do_jmp;
|
|
LOC_MEM,
|
|
LOC_REFERENCE : is_mem:=true;
|
|
LOC_CREGISTER,
|
|
LOC_REGISTER : is_mem:=false;
|
|
LOC_FLAGS : begin
|
|
emit_flag2reg(p^.left^.location.resflags,R_AL);
|
|
goto do_jmp;
|
|
end;
|
|
LOC_JUMP : begin
|
|
emitlab(truelabel);
|
|
emit_const_reg(A_MOV,S_B,1,R_AL);
|
|
emitjmp(C_None,aktexit2label);
|
|
emitlab(falselabel);
|
|
emit_reg_reg(A_XOR,S_B,R_AL,R_AL);
|
|
goto do_jmp;
|
|
end;
|
|
else
|
|
internalerror(2001);
|
|
end;
|
|
case procinfo^.retdef^.deftype of
|
|
orddef,
|
|
enumdef : begin
|
|
case procinfo^.retdef^.size of
|
|
4 : if is_mem then
|
|
emit_ref_reg(A_MOV,S_L,
|
|
newreference(p^.left^.location.reference),R_EAX)
|
|
else
|
|
emit_reg_reg(A_MOV,S_L,p^.left^.location.register,R_EAX);
|
|
2 : if is_mem then
|
|
emit_ref_reg(A_MOV,S_W,
|
|
newreference(p^.left^.location.reference),R_AX)
|
|
else
|
|
emit_reg_reg(A_MOV,S_W,makereg16(p^.left^.location.register),R_AX);
|
|
1 : if is_mem then
|
|
emit_ref_reg(A_MOV,S_B,
|
|
newreference(p^.left^.location.reference),R_AL)
|
|
else
|
|
emit_reg_reg(A_MOV,S_B,makereg8(p^.left^.location.register),R_AL);
|
|
end;
|
|
end;
|
|
pointerdef,
|
|
procvardef : begin
|
|
if is_mem then
|
|
emit_ref_reg(A_MOV,S_L,
|
|
newreference(p^.left^.location.reference),R_EAX)
|
|
else
|
|
emit_reg_reg(A_MOV,S_L,
|
|
p^.left^.location.register,R_EAX);
|
|
end;
|
|
floatdef : begin
|
|
if pfloatdef(procinfo^.retdef)^.typ=f32bit then
|
|
begin
|
|
if is_mem then
|
|
emit_ref_reg(A_MOV,S_L,
|
|
newreference(p^.left^.location.reference),R_EAX)
|
|
else
|
|
emit_reg_reg(A_MOV,S_L,p^.left^.location.register,R_EAX);
|
|
end
|
|
else
|
|
if is_mem then
|
|
floatload(pfloatdef(procinfo^.retdef)^.typ,p^.left^.location.reference);
|
|
end;
|
|
end;
|
|
do_jmp:
|
|
freelabel(truelabel);
|
|
freelabel(falselabel);
|
|
truelabel:=otlabel;
|
|
falselabel:=oflabel;
|
|
emitjmp(C_None,aktexit2label);
|
|
end
|
|
else
|
|
begin
|
|
emitjmp(C_None,aktexitlabel);
|
|
end;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondBreakN
|
|
*****************************************************************************}
|
|
|
|
procedure secondbreakn(list: paasmoutput; var p : ptree);
|
|
begin
|
|
if aktbreaklabel<>nil then
|
|
emitjmp(C_None,aktbreaklabel)
|
|
else
|
|
CGMessage(cg_e_break_not_allowed);
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondContinueN
|
|
*****************************************************************************}
|
|
|
|
procedure secondcontinuen(list: paasmoutput; var p : ptree);
|
|
begin
|
|
if aktcontinuelabel<>nil then
|
|
emitjmp(C_None,aktcontinuelabel)
|
|
else
|
|
CGMessage(cg_e_continue_not_allowed);
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondGoto
|
|
*****************************************************************************}
|
|
|
|
procedure secondgoto(list: paasmoutput; var p : ptree);
|
|
|
|
begin
|
|
emitjmp(C_None,p^.labelnr);
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondLabel
|
|
*****************************************************************************}
|
|
|
|
procedure secondlabel(list: paasmoutput; var p : ptree);
|
|
begin
|
|
emitlab(p^.labelnr);
|
|
cleartempgen;
|
|
secondpass(p^.left);
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondRaise
|
|
*****************************************************************************}
|
|
|
|
procedure secondraise(list: paasmoutput; var p : ptree);
|
|
|
|
var
|
|
a : pasmlabel;
|
|
|
|
begin
|
|
if assigned(p^.left) then
|
|
begin
|
|
{ generate the address }
|
|
if assigned(p^.right) then
|
|
begin
|
|
secondpass(p^.right);
|
|
if codegenerror then
|
|
exit;
|
|
end
|
|
else
|
|
begin
|
|
getlabel(a);
|
|
emitlab(a);
|
|
emit_sym(A_PUSH,S_L,a);
|
|
end;
|
|
secondpass(p^.left);
|
|
if codegenerror then
|
|
exit;
|
|
|
|
case p^.left^.location.loc of
|
|
LOC_MEM,LOC_REFERENCE:
|
|
emit_ref(A_PUSH,S_L,
|
|
newreference(p^.left^.location.reference));
|
|
LOC_CREGISTER,LOC_REGISTER : emit_reg(A_PUSH,S_L,
|
|
p^.left^.location.register);
|
|
else CGMessage(type_e_mismatch);
|
|
end;
|
|
emitcall('FPC_RAISEEXCEPTION');
|
|
end
|
|
else
|
|
begin
|
|
emitcall('FPC_POPADDRSTACK');
|
|
emitcall('FPC_RERAISE');
|
|
end;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondTryExcept
|
|
*****************************************************************************}
|
|
|
|
var
|
|
endexceptlabel : pasmlabel;
|
|
|
|
procedure secondtryexcept(list: paasmoutput; var p : ptree);
|
|
|
|
var
|
|
exceptlabel,doexceptlabel,oldendexceptlabel,
|
|
lastonlabel : pasmlabel;
|
|
|
|
begin
|
|
{ this can be called recursivly }
|
|
oldendexceptlabel:=endexceptlabel;
|
|
{ we modify EAX }
|
|
usedinproc:=usedinproc or ($80 shr byte(R_EAX));
|
|
|
|
getlabel(exceptlabel);
|
|
getlabel(doexceptlabel);
|
|
getlabel(endexceptlabel);
|
|
getlabel(lastonlabel);
|
|
push_int (1); { push type of exceptionframe }
|
|
emitcall('FPC_PUSHEXCEPTADDR');
|
|
emit_reg(A_PUSH,S_L,R_EAX);
|
|
emitcall('FPC_SETJMP');
|
|
emit_reg(A_PUSH,S_L,R_EAX);
|
|
emit_reg_reg(A_TEST,S_L,R_EAX,R_EAX);
|
|
emitjmp(C_NE,exceptlabel);
|
|
|
|
{ try code }
|
|
secondpass(p^.left);
|
|
if codegenerror then
|
|
exit;
|
|
|
|
emitlab(exceptlabel);
|
|
emitcall('FPC_POPADDRSTACK');
|
|
emit_reg(A_POP,S_L,R_EAX);
|
|
emit_reg_reg(A_TEST,S_L,R_EAX,R_EAX);
|
|
emitjmp(C_E,endexceptlabel);
|
|
emitlab(doexceptlabel);
|
|
|
|
if assigned(p^.right) then
|
|
secondpass(p^.right);
|
|
|
|
emitlab(lastonlabel);
|
|
{ default handling }
|
|
if assigned(p^.t1) then
|
|
begin
|
|
{ FPC_CATCHES must be called with
|
|
'default handler' flag (=-1)
|
|
}
|
|
push_int (-1);
|
|
emitcall('FPC_CATCHES');
|
|
maybe_loadesi;
|
|
secondpass(p^.t1);
|
|
emitcall('FPC_POPOBJECTSTACK');
|
|
maybe_loadesi;
|
|
end
|
|
else
|
|
emitcall('FPC_RERAISE');
|
|
{ reraise doesn't need a maybe_loadesi because it never }
|
|
{ returns (FK) }
|
|
emitlab(endexceptlabel);
|
|
freelabel(exceptlabel);
|
|
freelabel(doexceptlabel);
|
|
freelabel(endexceptlabel);
|
|
freelabel(lastonlabel);
|
|
endexceptlabel:=oldendexceptlabel;
|
|
end;
|
|
|
|
procedure secondon(list: paasmoutput; var p : ptree);
|
|
|
|
var
|
|
nextonlabel : pasmlabel;
|
|
ref : treference;
|
|
|
|
begin
|
|
getlabel(nextonlabel);
|
|
|
|
{ push the vmt }
|
|
emit_sym(A_PUSH,S_L,
|
|
newasmsymbol(p^.excepttype^.vmt_mangledname));
|
|
emitcall('FPC_CATCHES');
|
|
emit_reg_reg(A_TEST,S_L,R_EAX,R_EAX);
|
|
emitjmp(C_E,nextonlabel);
|
|
ref.symbol:=nil;
|
|
gettempofsizereference(4,ref);
|
|
|
|
{ what a hack ! }
|
|
if assigned(p^.exceptsymtable) then
|
|
pvarsym(p^.exceptsymtable^.symindex^.first)^.address:=ref.offset;
|
|
|
|
emit_reg_ref(A_MOV,S_L,
|
|
R_EAX,newreference(ref));
|
|
|
|
if assigned(p^.right) then
|
|
begin
|
|
{ esi is destroyed by FPC_CATCHES }
|
|
maybe_loadesi;
|
|
secondpass(p^.right);
|
|
end;
|
|
|
|
|
|
emit_ref(A_PUSH,S_L,
|
|
newreference(ref));
|
|
emitcall('FPC_DESTROYEXCEPTION');
|
|
emitcall('FPC_POPOBJECTSTACK');
|
|
|
|
{ clear some stuff }
|
|
ungetiftemp(ref);
|
|
emitjmp(C_None,endexceptlabel);
|
|
emitlab(nextonlabel);
|
|
{ next on node }
|
|
if assigned(p^.left) then
|
|
secondpass(p^.left);
|
|
end;
|
|
|
|
{*****************************************************************************
|
|
SecondTryFinally
|
|
*****************************************************************************}
|
|
|
|
procedure secondtryfinally(list: paasmoutput; var p : ptree);
|
|
|
|
var
|
|
finallylabel,noreraiselabel : pasmlabel;
|
|
oldaktexitlabel,exitfinallylabel : pasmlabel;
|
|
oldaktexit2label : pasmlabel;
|
|
|
|
begin
|
|
{ we modify EAX }
|
|
usedinproc:=usedinproc or ($80 shr byte(R_EAX));
|
|
getlabel(finallylabel);
|
|
getlabel(noreraiselabel);
|
|
oldaktexitlabel:=aktexitlabel;
|
|
oldaktexit2label:=aktexit2label;
|
|
getlabel(exitfinallylabel);
|
|
aktexitlabel:=exitfinallylabel;
|
|
aktexit2label:=exitfinallylabel;
|
|
|
|
push_int(1); { Type of stack-frame must be pushed}
|
|
emitcall('FPC_PUSHEXCEPTADDR');
|
|
emit_reg(A_PUSH,S_L,R_EAX);
|
|
emitcall('FPC_SETJMP');
|
|
emit_reg(A_PUSH,S_L,R_EAX);
|
|
emit_reg_reg(A_TEST,S_L,R_EAX,R_EAX);
|
|
emitjmp(C_NE,finallylabel);
|
|
|
|
{ try code }
|
|
secondpass(p^.left);
|
|
if codegenerror then
|
|
exit;
|
|
|
|
emitlab(finallylabel);
|
|
emitcall('FPC_POPADDRSTACK');
|
|
{ finally code }
|
|
secondpass(p^.right);
|
|
if codegenerror then
|
|
exit;
|
|
emit_reg(A_POP,S_L,R_EAX);
|
|
emit_reg_reg(A_TEST,S_L,R_EAX,R_EAX);
|
|
emitjmp(C_E,noreraiselabel);
|
|
emit_reg(A_DEC,S_L,R_EAX);
|
|
emitjmp(C_NE,oldaktexitlabel);
|
|
emitcall('FPC_RERAISE');
|
|
{ reraise never returns ! }
|
|
emitlab(exitfinallylabel);
|
|
|
|
{ do some magic for exit in the try block }
|
|
emit_reg(A_POP,S_L,R_EAX);
|
|
emit_const(A_PUSH,S_L,2);
|
|
emitjmp(C_NONE,finallylabel);
|
|
emitlab(noreraiselabel);
|
|
aktexitlabel:=oldaktexitlabel;
|
|
aktexit2label:=oldaktexit2label;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
SecondFail
|
|
*****************************************************************************}
|
|
|
|
procedure secondfail(list: paasmoutput; var p : ptree);
|
|
begin
|
|
emitjmp(C_None,faillabel);
|
|
end;
|
|
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.2 2000-01-07 01:14:52 peter
|
|
* updated copyright to 2000
|
|
|
|
Revision 1.1 1999/11/03 14:13:59 jonas
|
|
+ initial implementation
|
|
|
|
|
|
}
|