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55a161bbbf
fpc/compiler/ncgutil.pas
daniel 55a161bbbf * Tregister changed into a record
2003-01-08 18:43:56 +00:00

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{
$Id$
Copyright (c) 1998-2002 by Florian Klaempfl
Helper routines for all code generators
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 ncgutil;
{$i fpcdefs.inc}
interface
uses
node,cpuinfo,
globtype,
cpubase,cpupara,
aasmbase,aasmtai,aasmcpu,
cginfo,symbase,symdef,symtype,
{$ifndef cpu64bit}
cg64f32,
{$endif cpu64bit}
rgobj;
type
tloadregvars = (lr_dont_load_regvars, lr_load_regvars);
tmaybesave = record
saved : boolean;
ref : treference;
end;
procedure firstcomplex(p : tbinarynode);
procedure maketojumpbool(list:TAAsmoutput; p : tnode; loadregvars: tloadregvars);
procedure remove_non_regvars_from_loc(const t: tlocation; var regs: tregisterset);
procedure location_force_reg(list: TAAsmoutput;var l:tlocation;dst_size:TCGSize;maybeconst:boolean);
procedure location_force_mem(list: TAAsmoutput;var l:tlocation);
procedure maybe_save(list:taasmoutput;needed:integer;var l:tlocation;var s:tmaybesave);
procedure maybe_restore(list:taasmoutput;var l:tlocation;const s:tmaybesave);
function maybe_pushfpu(list:taasmoutput;needed : byte;var l:tlocation) : boolean;
procedure push_value_para(p:tnode;calloption:tproccalloption;
para_offset:longint;alignment : longint;
const locpara : tparalocation);
procedure genentrycode(list : TAAsmoutput;
make_global:boolean;
stackframe:longint;
var parasize:longint;var nostackframe:boolean;
inlined : boolean);
procedure genexitcode(list : TAAsmoutput;parasize:longint;nostackframe,inlined:boolean);
procedure genimplicitunitinit(list : TAAsmoutput);
procedure genimplicitunitfinal(list : TAAsmoutput);
{#
Allocate the buffers for exception management and setjmp environment.
Return a pointer to these buffers, send them to the utility routine
so they are registered, and then call setjmp.
Then compare the result of setjmp with 0, and if not equal
to zero, then jump to exceptlabel.
Also store the result of setjmp to a temporary space by calling g_save_exception_reason
It is to note that this routine may be called *after* the stackframe of a
routine has been called, therefore on machines where the stack cannot
be modified, all temps should be allocated on the heap instead of the
stack.
}
procedure new_exception(list : taasmoutput;const jmpbuf,envbuf, href : treference;
a : aword; exceptlabel : tasmlabel);
procedure free_exception(list : taasmoutput;const jmpbuf, envbuf, href : treference;
a : aword ; endexceptlabel : tasmlabel; onlyfree : boolean);
implementation
uses
{$ifdef Delphi}
Sysutils,
{$else}
strings,
{$endif}
cutils,cclasses,
globals,systems,verbose,
symconst,symsym,symtable,defutil,
paramgr,fmodule,
cgbase,regvars,
{$ifdef GDB}
gdb,
{$endif GDB}
ncon,
tgobj,cgobj,cgcpu;
{*****************************************************************************
Misc Helpers
*****************************************************************************}
{ DO NOT RELY on the fact that the tnode is not yet swaped
because of inlining code PM }
procedure firstcomplex(p : tbinarynode);
var
hp : tnode;
begin
{ always calculate boolean AND and OR from left to right }
if (p.nodetype in [orn,andn]) and
is_boolean(p.left.resulttype.def) then
begin
if nf_swaped in p.flags then
internalerror(234234);
end
else
if (
(p.location.loc=LOC_FPUREGISTER) and
(p.right.registersfpu > p.left.registersfpu)
) or
(
(
(
((p.left.registersfpu = 0) and (p.right.registersfpu = 0)) or
(p.location.loc<>LOC_FPUREGISTER)
) and
(p.left.registers32<p.right.registers32)
) and
{ the following check is appropriate, because all }
{ 4 registers are rarely used and it is thereby }
{ achieved that the extra code is being dropped }
{ by exchanging not commutative operators }
(p.right.registers32<=c_countusableregsint)
) then
begin
hp:=p.left;
p.left:=p.right;
p.right:=hp;
if nf_swaped in p.flags then
exclude(p.flags,nf_swaped)
else
include(p.flags,nf_swaped);
end;
end;
procedure maketojumpbool(list:TAAsmoutput; p : tnode; loadregvars: tloadregvars);
{
produces jumps to true respectively false labels using boolean expressions
depending on whether the loading of regvars is currently being
synchronized manually (such as in an if-node) or automatically (most of
the other cases where this procedure is called), loadregvars can be
"lr_load_regvars" or "lr_dont_load_regvars"
}
var
opsize : tcgsize;
storepos : tfileposinfo;
begin
if nf_error in p.flags then
exit;
storepos:=aktfilepos;
aktfilepos:=p.fileinfo;
if is_boolean(p.resulttype.def) then
begin
if loadregvars = lr_load_regvars then
load_all_regvars(list);
if is_constboolnode(p) then
begin
if tordconstnode(p).value<>0 then
cg.a_jmp_always(list,truelabel)
else
cg.a_jmp_always(list,falselabel)
end
else
begin
opsize:=def_cgsize(p.resulttype.def);
case p.location.loc of
LOC_CREGISTER,LOC_REGISTER,LOC_CREFERENCE,LOC_REFERENCE :
begin
if (p.location.loc = LOC_CREGISTER) then
load_regvar_reg(list,p.location.register);
cg.a_cmp_const_loc_label(list,opsize,OC_NE,
0,p.location,truelabel);
{ !!! should happen right after cmp (JM) }
location_release(list,p.location);
cg.a_jmp_always(list,falselabel);
end;
{$ifdef cpuflags}
LOC_FLAGS :
begin
cg.a_jmp_flags(list,p.location.resflags,
truelabel);
cg.a_jmp_always(list,falselabel);
end;
{$endif cpuflags}
end;
end;
end
else
internalerror(200112305);
aktfilepos:=storepos;
end;
procedure remove_non_regvars_from_loc(const t: tlocation; var regs: tregisterset);
begin
case t.loc of
LOC_REGISTER:
begin
{ can't be a regvar, since it would be LOC_CREGISTER then }
if t.register.enum>lastreg then
internalerror(200201081);
if t.registerhigh.enum>lastreg then
internalerror(200201081);
exclude(regs,t.register.enum);
if t.registerhigh.enum <> R_NO then
exclude(regs,t.registerhigh.enum);
end;
LOC_CREFERENCE,LOC_REFERENCE:
begin
if t.reference.base.enum>lastreg then
internalerror(200201081);
if t.reference.index.enum>lastreg then
internalerror(200201081);
if not(cs_regalloc in aktglobalswitches) or
(t.reference.base.enum in rg.usableregsint) then
exclude(regs,t.reference.base.enum);
if not(cs_regalloc in aktglobalswitches) or
(t.reference.index.enum in rg.usableregsint) then
exclude(regs,t.reference.index.enum);
end;
end;
end;
{*****************************************************************************
EXCEPTION MANAGEMENT
*****************************************************************************}
procedure new_exception(list : taasmoutput;const jmpbuf,envbuf, href : treference;
a : aword; exceptlabel : tasmlabel);
var r:Tregister;
begin
cg.a_paramaddr_ref(list,envbuf,paramanager.getintparaloc(3));
cg.a_paramaddr_ref(list,jmpbuf,paramanager.getintparaloc(2));
{ push type of exceptionframe }
cg.a_param_const(list,OS_S32,1,paramanager.getintparaloc(1));
cg.a_call_name(list,'FPC_PUSHEXCEPTADDR');
r.enum:=accumulator;
cg.a_param_reg(list,OS_ADDR,r,paramanager.getintparaloc(1));
cg.a_call_name(list,'FPC_SETJMP');
cg.g_exception_reason_save(list, href);
cg.a_cmp_const_reg_label(list,OS_S32,OC_NE,0,r,exceptlabel);
end;
procedure free_exception(list : taasmoutput;const jmpbuf, envbuf, href : treference;
a : aword ; endexceptlabel : tasmlabel; onlyfree : boolean);
var r:Tregister;
begin
cg.a_call_name(list,'FPC_POPADDRSTACK');
if not onlyfree then
begin
cg.g_exception_reason_load(list, href);
r.enum:=accumulator;
cg.a_cmp_const_reg_label(list,OS_S32,OC_EQ,a,r,endexceptlabel);
end;
end;
{*****************************************************************************
TLocation
*****************************************************************************}
{$ifndef cpu64bit}
{ 32-bit version }
procedure location_force(list: TAAsmoutput;var l:tlocation;dst_size:TCGSize;maybeconst:boolean);
var
hregister,
hregisterhi : tregister;
hreg64 : tregister64;
hl : tasmlabel;
begin
{ handle transformations to 64bit separate }
if dst_size in [OS_64,OS_S64] then
begin
if not (l.size in [OS_64,OS_S64]) then
begin
{ load a smaller size to OS_64 }
if l.loc=LOC_REGISTER then
begin
hregister:=rg.makeregsize(l.registerlow,OS_INT);
cg.a_load_reg_reg(list,l.size,OS_32,l.registerlow,hregister);
end
else
hregister:=rg.getregisterint(list);
{ load value in low register }
case l.loc of
LOC_FLAGS :
cg.g_flags2reg(list,OS_INT,l.resflags,hregister);
LOC_JUMP :
begin
cg.a_label(list,truelabel);
cg.a_load_const_reg(list,OS_INT,1,hregister);
objectlibrary.getlabel(hl);
cg.a_jmp_always(list,hl);
cg.a_label(list,falselabel);
cg.a_load_const_reg(list,OS_INT,0,hregister);
cg.a_label(list,hl);
end;
else
cg.a_load_loc_reg(list,l,hregister);
end;
{ reset hi part, take care of the signed bit of the current value }
hregisterhi:=rg.getregisterint(list);
if (dst_size=OS_S64) and
(l.size in [OS_S8,OS_S16,OS_S32]) then
begin
if l.loc=LOC_CONSTANT then
begin
if (longint(l.value)<0) then
cg.a_load_const_reg(list,OS_32,$ffffffff,hregisterhi)
else
cg.a_load_const_reg(list,OS_32,0,hregisterhi);
end
else
begin
cg.a_op_const_reg_reg(list,OP_SAR,OS_32,31,hregister,
hregisterhi);
end;
end
else
cg.a_load_const_reg(list,OS_32,0,hregisterhi);
location_reset(l,LOC_REGISTER,dst_size);
l.registerlow:=hregister;
l.registerhigh:=hregisterhi;
end
else
begin
{ 64bit to 64bit }
if (l.loc=LOC_REGISTER) or
((l.loc=LOC_CREGISTER) and maybeconst) then
begin
hregister:=l.registerlow;
hregisterhi:=l.registerhigh;
end
else
begin
hregister:=rg.getregisterint(list);
hregisterhi:=rg.getregisterint(list);
end;
hreg64.reglo:=hregister;
hreg64.reghi:=hregisterhi;
{ load value in new register }
cg64.a_load64_loc_reg(list,l,hreg64);
location_reset(l,LOC_REGISTER,dst_size);
l.registerlow:=hregister;
l.registerhigh:=hregisterhi;
end;
end
else
begin
{ transformations to 32bit or smaller }
if l.loc=LOC_REGISTER then
begin
{ if the previous was 64bit release the high register }
if l.size in [OS_64,OS_S64] then
begin
rg.ungetregisterint(list,l.registerhigh);
l.registerhigh.enum:=R_NO;
end;
hregister:=l.register;
end
else
begin
{ get new register }
if (l.loc=LOC_CREGISTER) and
maybeconst and
(TCGSize2Size[dst_size]=TCGSize2Size[l.size]) then
hregister:=l.register
else
hregister:=rg.getregisterint(list);
end;
hregister:=rg.makeregsize(hregister,dst_size);
{ load value in new register }
case l.loc of
LOC_FLAGS :
cg.g_flags2reg(list,dst_size,l.resflags,hregister);
LOC_JUMP :
begin
cg.a_label(list,truelabel);
cg.a_load_const_reg(list,dst_size,1,hregister);
objectlibrary.getlabel(hl);
cg.a_jmp_always(list,hl);
cg.a_label(list,falselabel);
cg.a_load_const_reg(list,dst_size,0,hregister);
cg.a_label(list,hl);
end;
else
begin
{ load_loc_reg can only handle size >= l.size, when the
new size is smaller then we need to adjust the size
of the orignal and maybe recalculate l.register for i386 }
if (TCGSize2Size[dst_size]<TCGSize2Size[l.size]) then
begin
if (l.loc in [LOC_REGISTER,LOC_CREGISTER]) then
l.register:=rg.makeregsize(l.register,dst_size);
{ for big endian systems, the reference's offset must }
{ be increased in this case, since they have the }
{ MSB first in memory and e.g. byte(word_var) should }
{ return the second byte in this case (JM) }
if (target_info.endian = ENDIAN_BIG) and
(l.loc in [LOC_REFERENCE,LOC_CREFERENCE]) then
inc(l.reference.offset,TCGSize2Size[l.size]-TCGSize2Size[dst_size]);
l.size:=dst_size;
end;
cg.a_load_loc_reg(list,l,hregister);
end;
end;
location_reset(l,LOC_REGISTER,dst_size);
l.register:=hregister;
end;
end;
{$else cpu64bit}
{ 64-bit version }
procedure location_force(list: TAAsmoutput;var l:tlocation;dst_size:TCGSize;maybeconst:boolean);
var
hregister : tregister;
hl : tasmlabel;
begin
{ handle transformations to 64bit separate }
if dst_size in [OS_64,OS_S64] then
begin
{ load a smaller size to OS_64 }
if l.loc=LOC_REGISTER then
hregister:=rg.makeregsize(l.register,OS_INT)
else
hregister:=rg.getregisterint(list);
{ load value in low register }
case l.loc of
{$ifdef cpuflags}
LOC_FLAGS :
cg.g_flags2reg(list,OS_INT,l.resflags,hregister);
{$endif cpuflags}
LOC_JUMP :
begin
cg.a_label(list,truelabel);
cg.a_load_const_reg(list,OS_INT,1,hregister);
objectlibrary.getlabel(hl);
cg.a_jmp_always(list,hl);
cg.a_label(list,falselabel);
cg.a_load_const_reg(list,OS_INT,0,hregister);
cg.a_label(list,hl);
end;
else
cg.a_load_loc_reg(list,l,hregister);
end;
location_reset(l,LOC_REGISTER,dst_size);
l.register:=hregister;
end
else
begin
{ transformations to 32bit or smaller }
if l.loc=LOC_REGISTER then
begin
hregister:=l.register;
end
else
begin
{ get new register }
if (l.loc=LOC_CREGISTER) and
maybeconst and
(TCGSize2Size[dst_size]=TCGSize2Size[l.size]) then
hregister:=l.register
else
hregister:=rg.getregisterint(list);
end;
hregister:=rg.makeregsize(hregister,dst_size);
{ load value in new register }
case l.loc of
{$ifdef cpuflags}
LOC_FLAGS :
cg.g_flags2reg(list,dst_size,l.resflags,hregister);
{$endif cpuflags}
LOC_JUMP :
begin
cg.a_label(list,truelabel);
cg.a_load_const_reg(list,dst_size,1,hregister);
objectlibrary.getlabel(hl);
cg.a_jmp_always(list,hl);
cg.a_label(list,falselabel);
cg.a_load_const_reg(list,dst_size,0,hregister);
cg.a_label(list,hl);
end;
else
begin
{ load_loc_reg can only handle size >= l.size, when the
new size is smaller then we need to adjust the size
of the orignal and maybe recalculate l.register for i386 }
if (TCGSize2Size[dst_size]<TCGSize2Size[l.size]) then
begin
if (l.loc in [LOC_REGISTER,LOC_CREGISTER]) then
l.register:=rg.makeregsize(l.register,dst_size);
{ for big endian systems, the reference's offset must }
{ be increased in this case, since they have the }
{ MSB first in memory and e.g. byte(word_var) should }
{ return the second byte in this case (JM) }
if (target_info.endian = ENDIAN_BIG) and
(l.loc in [LOC_REFERENCE,LOC_CREFERENCE]) then
inc(l.reference.offset,TCGSize2Size[l.size]-TCGSize2Size[dst_size]);
l.size:=dst_size;
end;
cg.a_load_loc_reg(list,l,hregister);
end;
end;
location_reset(l,LOC_REGISTER,dst_size);
l.register:=hregister;
end;
end;
{$endif cpu64bit}
procedure location_force_reg(list: TAAsmoutput;var l:tlocation;dst_size:TCGSize;maybeconst:boolean);
begin
{ release previous location before demanding a new register }
if (l.loc in [LOC_REFERENCE,LOC_CREFERENCE]) then
begin
location_freetemp(list,l);
location_release(list,l);
end;
location_force(list, l, dst_size, maybeconst)
end;
procedure location_force_mem(list: TAAsmoutput;var l:tlocation);
var
r : treference;
begin
case l.loc of
LOC_FPUREGISTER,
LOC_CFPUREGISTER :
begin
tg.GetTemp(list,TCGSize2Size[l.size],tt_normal,r);
cg.a_loadfpu_reg_ref(list,l.size,l.register,r);
location_release(exprasmlist,l);
location_reset(l,LOC_REFERENCE,l.size);
l.reference:=r;
end;
LOC_CONSTANT,
LOC_REGISTER,
LOC_CREGISTER :
begin
tg.GetTemp(list,TCGSize2Size[l.size],tt_normal,r);
if l.size in [OS_64,OS_S64] then
cg64.a_load64_loc_ref(list,l,r)
else
cg.a_load_loc_ref(list,l,r);
location_release(exprasmlist,l);
location_reset(l,LOC_REFERENCE,l.size);
l.reference:=r;
end;
LOC_CREFERENCE,
LOC_REFERENCE : ;
else
internalerror(200203219);
end;
end;
{*****************************************************************************
Maybe_Save
*****************************************************************************}
procedure maybe_save(list:taasmoutput;needed:integer;var l:tlocation;var s:tmaybesave);
begin
s.saved:=false;
if l.loc=LOC_CREGISTER then
begin
s.saved:=true;
exit;
end;
if needed>rg.countunusedregsint then
begin
case l.loc of
LOC_REGISTER :
begin
{$ifndef cpu64bit}
if l.size in [OS_64,OS_S64] then
begin
tg.GetTemp(exprasmlist,8,tt_normal,s.ref);
cg64.a_load64_reg_ref(exprasmlist,joinreg64(l.registerlow,l.registerhigh),s.ref);
end
else
{$endif cpu64bit}
begin
tg.GetTemp(exprasmlist,TCGSize2Size[l.size],tt_normal,s.ref);
cg.a_load_reg_ref(exprasmlist,l.size,l.register,s.ref);
end;
location_release(exprasmlist,l);
s.saved:=true;
end;
LOC_REFERENCE,
LOC_CREFERENCE :
begin
if l.reference.base.enum>lastreg then
internalerror(200101081);
if ((l.reference.base.enum<>R_NO) or
(l.reference.index.enum<>R_NO)) then
begin
{ load address into a single base register }
if l.reference.index.enum<>R_NO then
begin
cg.a_loadaddr_ref_reg(list,l.reference,l.reference.index);
rg.ungetregister(list,l.reference.base);
reference_reset_base(l.reference,l.reference.index,0);
end
else
begin
cg.a_loadaddr_ref_reg(list,l.reference,l.reference.base);
rg.ungetregister(list,l.reference.index);
reference_reset_base(l.reference,l.reference.base,0);
end;
{ save base register }
tg.GetTemp(exprasmlist,TCGSize2Size[OS_ADDR],tt_normal,s.ref);
cg.a_load_reg_ref(exprasmlist,OS_ADDR,l.reference.base,s.ref);
{ release }
location_release(exprasmlist,l);
s.saved:=true;
end;
end;
end;
end;
end;
procedure maybe_restore(list:taasmoutput;var l:tlocation;const s:tmaybesave);
begin
if not s.saved then
exit;
if l.loc=LOC_CREGISTER then
begin
load_regvar_reg(list,l.register);
exit;
end;
case l.loc of
LOC_REGISTER :
begin
{$ifndef cpu64bit}
if l.size in [OS_64,OS_S64] then
begin
l.registerlow:=rg.getregisterint(exprasmlist);
l.registerhigh:=rg.getregisterint(exprasmlist);
cg64.a_load64_ref_reg(exprasmlist,s.ref,joinreg64(l.registerlow,l.registerhigh));
end
else
{$endif cpu64bit}
begin
l.register:=rg.getregisterint(exprasmlist);
cg.a_load_ref_reg(exprasmlist,OS_INT,s.ref,l.register);
end;
end;
LOC_CREFERENCE,
LOC_REFERENCE :
begin
reference_reset(l.reference);
l.reference.base:=rg.getaddressregister(exprasmlist);
cg.a_load_ref_reg(exprasmlist,OS_ADDR,s.ref,l.reference.base);
end;
end;
tg.ungetiftemp(exprasmlist,s.ref);
end;
function maybe_pushfpu(list:taasmoutput;needed : byte;var l:tlocation) : boolean;
begin
if (needed>=maxfpuregs) and
(l.loc = LOC_FPUREGISTER) then
begin
location_force_mem(list,l);
maybe_pushfpu:=true;
end
else
maybe_pushfpu:=false;
end;
{*****************************************************************************
Push Value Para
*****************************************************************************}
procedure push_value_para(p:tnode;calloption:tproccalloption;
para_offset:longint;alignment : longint;
const locpara : tparalocation);
var
tempreference : treference;
href : treference;
hreg : tregister;
sizetopush,
size : longint;
cgsize : tcgsize;
r:Tregister;
begin
{ we've nothing to push when the size of the parameter is 0 }
if p.resulttype.def.size=0 then
exit;
{ Move flags and jump in register to make it less complex }
if p.location.loc in [LOC_FLAGS,LOC_JUMP] then
location_force_reg(exprasmlist,p.location,def_cgsize(p.resulttype.def),false);
{ Handle Floating point types differently }
if p.resulttype.def.deftype=floatdef then
begin
case p.location.loc of
LOC_FPUREGISTER,
LOC_CFPUREGISTER:
begin
size:=align(tfloatdef(p.resulttype.def).size,alignment);
inc(pushedparasize,size);
if calloption<>pocall_inline then
cg.g_stackpointer_alloc(exprasmlist,size);
{$ifdef GDB}
if (cs_debuginfo in aktmoduleswitches) and
(exprasmList.first=exprasmList.last) then
exprasmList.concat(Tai_force_line.Create);
{$endif GDB}
{ this is the easiest case for inlined !! }
r.enum:=stack_pointer_reg;
if calloption=pocall_inline then
reference_reset_base(href,procinfo.framepointer,para_offset-pushedparasize)
else
reference_reset_base(href,r,0);
cg.a_loadfpu_reg_ref(exprasmlist,
def_cgsize(p.resulttype.def),p.location.register,href);
end;
LOC_REFERENCE,
LOC_CREFERENCE :
begin
sizetopush:=align(p.resulttype.def.size,alignment);
tempreference:=p.location.reference;
inc(tempreference.offset,sizetopush);
while (sizetopush>0) do
begin
if sizetopush>=4 then
begin
cgsize:=OS_32;
inc(pushedparasize,4);
dec(tempreference.offset,4);
dec(sizetopush,4);
end
else
begin
cgsize:=OS_16;
inc(pushedparasize,2);
dec(tempreference.offset,2);
dec(sizetopush,2);
end;
if calloption=pocall_inline then
begin
reference_reset_base(href,procinfo.framepointer,para_offset-pushedparasize);
cg.a_load_ref_ref(exprasmlist,cgsize,tempreference,href);
end
else
cg.a_param_ref(exprasmlist,cgsize,tempreference,locpara);
end;
end;
else
internalerror(200204243);
end;
location_release(exprasmlist,p.location);
end
else
begin
{ copy the value on the stack or use normal parameter push? }
if paramanager.copy_value_on_stack(p.resulttype.def,calloption) then
begin
if not (p.location.loc in [LOC_REFERENCE,LOC_CREFERENCE]) then
internalerror(200204241);
{ push on stack }
size:=align(p.resulttype.def.size,alignment);
inc(pushedparasize,size);
cg.g_stackpointer_alloc(exprasmlist,size);
r.enum:=stack_pointer_reg;
reference_reset_base(href,r,0);
cg.g_concatcopy(exprasmlist,p.location.reference,href,size,false,false);
end
else
begin
case p.location.loc of
LOC_CONSTANT,
LOC_REGISTER,
LOC_CREGISTER,
LOC_REFERENCE,
LOC_CREFERENCE :
begin
cgsize:=def_cgsize(p.resulttype.def);
if cgsize in [OS_64,OS_S64] then
begin
inc(pushedparasize,8);
if calloption=pocall_inline then
begin
reference_reset_base(href,procinfo.framepointer,para_offset-pushedparasize);
if p.location.loc in [LOC_REFERENCE,LOC_CREFERENCE] then
begin
size:=align(p.resulttype.def.size,alignment);
cg.g_concatcopy(exprasmlist,p.location.reference,href,size,false,false)
end
else
cg64.a_load64_loc_ref(exprasmlist,p.location,href);
end
else
cg64.a_param64_loc(exprasmlist,p.location,locpara);
end
else
begin
case cgsize of
OS_8,OS_S8 :
begin
if alignment=4 then
cgsize:=OS_32
else
cgsize:=OS_16;
end;
OS_16,OS_S16 :
begin
if alignment=4 then
cgsize:=OS_32;
end;
end;
{ update register to use to match alignment }
if p.location.loc in [LOC_REGISTER,LOC_CREGISTER] then
begin
hreg:=p.location.register;
p.location.register:=rg.makeregsize(p.location.register,cgsize);
end;
inc(pushedparasize,alignment);
if calloption=pocall_inline then
begin
reference_reset_base(href,procinfo.framepointer,para_offset-pushedparasize);
if p.location.loc in [LOC_REFERENCE,LOC_CREFERENCE] then
begin
size:=align(p.resulttype.def.size,alignment);
cg.g_concatcopy(exprasmlist,p.location.reference,href,size,false,false)
end
else
cg.a_load_loc_ref(exprasmlist,p.location,href);
end
else
cg.a_param_loc(exprasmlist,p.location,locpara);
{ restore old register }
if p.location.loc in [LOC_REGISTER,LOC_CREGISTER] then
p.location.register:=hreg;
end;
location_release(exprasmlist,p.location);
end;
{$ifdef SUPPORT_MMX}
LOC_MMXREGISTER,
LOC_CMMXREGISTER:
begin
inc(pushedparasize,8);
if calloption=pocall_inline then
begin
reference_reset_base(href,procinfo.framepointer,para_offset-pushedparasize);
cg.a_loadmm_reg_ref(exprasmlist,p.location.register,href);
end
else
cg.a_parammm_reg(exprasmlist,p.location.register);
end;
{$endif SUPPORT_MMX}
else
internalerror(200204241);
end;
end;
end;
end;
{****************************************************************************
Entry/Exit Code
****************************************************************************}
procedure copyvalueparas(p : tnamedindexitem;arg:pointer);
var
href1,href2 : treference;
list : taasmoutput;
begin
list:=taasmoutput(arg);
if (tsym(p).typ=varsym) and
(tvarsym(p).varspez=vs_value) and
(paramanager.push_addr_param(tvarsym(p).vartype.def,procinfo.procdef.proccalloption)) then
begin
reference_reset_base(href1,procinfo.framepointer,tvarsym(p).address+procinfo.para_offset);
if is_open_array(tvarsym(p).vartype.def) or
is_array_of_const(tvarsym(p).vartype.def) then
cg.g_copyvaluepara_openarray(list,href1,tarraydef(tvarsym(p).vartype.def).elesize)
else
begin
reference_reset_base(href2,procinfo.framepointer,-tvarsym(p).localvarsym.address+tvarsym(p).localvarsym.owner.address_fixup);
if is_shortstring(tvarsym(p).vartype.def) then
cg.g_copyshortstring(list,href1,href2,tstringdef(tvarsym(p).vartype.def).len,false,true)
else
cg.g_concatcopy(list,href1,href2,tvarsym(p).vartype.def.size,true,true);
end;
end;
end;
procedure removevalueparas(p : tnamedindexitem;arg:pointer);
var
href1 : treference;
list : taasmoutput;
begin
list:=taasmoutput(arg);
if (tsym(p).typ=varsym) and
(tvarsym(p).varspez=vs_value) and
(is_open_array(tvarsym(p).vartype.def) or
is_array_of_const(tvarsym(p).vartype.def)) and
(paramanager.push_addr_param(tvarsym(p).vartype.def,procinfo.procdef.proccalloption)) then
begin
reference_reset_base(href1,procinfo.framepointer,tvarsym(p).address+procinfo.para_offset);
cg.g_removevaluepara_openarray(list,href1,tarraydef(tvarsym(p).vartype.def).elesize);
end;
end;
{ generates the code for initialisation of local data }
procedure initialize_data(p : tnamedindexitem;arg:pointer);
var
href : treference;
list : taasmoutput;
begin
list:=taasmoutput(arg);
if (tsym(p).typ=varsym) and
not(vo_is_local_copy in tvarsym(p).varoptions) and
assigned(tvarsym(p).vartype.def) and
not(is_class(tvarsym(p).vartype.def)) and
tvarsym(p).vartype.def.needs_inittable then
begin
if assigned(procinfo) and
(cs_implicit_exceptions in aktmoduleswitches) then
procinfo.flags:=procinfo.flags or pi_needs_implicit_finally;
if tsym(p).owner.symtabletype in [localsymtable,inlinelocalsymtable] then
reference_reset_base(href,procinfo.framepointer,-tvarsym(p).address+tvarsym(p).owner.address_fixup)
else
reference_reset_symbol(href,objectlibrary.newasmsymbol(tvarsym(p).mangledname),0);
cg.g_initialize(list,tvarsym(p).vartype.def,href,false);
end;
end;
{ generates the code for finalisation of local data }
procedure finalize_data(p : tnamedindexitem;arg:pointer);
var
href : treference;
list : taasmoutput;
begin
list:=taasmoutput(arg);
case tsym(p).typ of
varsym :
begin
if not(vo_is_local_copy in tvarsym(p).varoptions) and
assigned(tvarsym(p).vartype.def) and
not(is_class(tvarsym(p).vartype.def)) and
tvarsym(p).vartype.def.needs_inittable then
begin
if tsym(p).owner.symtabletype in [localsymtable,inlinelocalsymtable] then
reference_reset_base(href,procinfo.framepointer,-tvarsym(p).address+tvarsym(p).owner.address_fixup)
else
reference_reset_symbol(href,objectlibrary.newasmsymbol(tvarsym(p).mangledname),0);
cg.g_finalize(list,tvarsym(p).vartype.def,href,false);
end;
end;
typedconstsym :
begin
if ttypedconstsym(p).is_writable and
ttypedconstsym(p).typedconsttype.def.needs_inittable then
begin
reference_reset_symbol(href,objectlibrary.newasmsymbol(ttypedconstsym(p).mangledname),0);
cg.g_finalize(list,ttypedconstsym(p).typedconsttype.def,href,false);
end;
end;
end;
end;
{ generates the code for incrementing the reference count of parameters and
initialize out parameters }
procedure init_paras(p : tnamedindexitem;arg:pointer);
var
href : treference;
tmpreg : tregister;
list : taasmoutput;
begin
list:=taasmoutput(arg);
if (tsym(p).typ=varsym) and
not is_class(tvarsym(p).vartype.def) and
tvarsym(p).vartype.def.needs_inittable then
begin
case tvarsym(p).varspez of
vs_value :
begin
if (cs_implicit_exceptions in aktmoduleswitches) then
procinfo.flags:=procinfo.flags or pi_needs_implicit_finally;
if assigned(tvarsym(p).localvarsym) then
reference_reset_base(href,procinfo.framepointer,
-tvarsym(p).localvarsym.address+tvarsym(p).localvarsym.owner.address_fixup)
else
reference_reset_base(href,procinfo.framepointer,tvarsym(p).address+procinfo.para_offset);
cg.g_incrrefcount(list,tvarsym(p).vartype.def,href);
end;
vs_out :
begin
reference_reset_base(href,procinfo.framepointer,tvarsym(p).address+procinfo.para_offset);
tmpreg:=cg.get_scratch_reg_address(list);
cg.a_load_ref_reg(list,OS_ADDR,href,tmpreg);
reference_reset_base(href,tmpreg,0);
cg.g_initialize(list,tvarsym(p).vartype.def,href,false);
cg.free_scratch_reg(list,tmpreg);
end;
end;
end;
end;
{ generates the code for decrementing the reference count of parameters }
procedure final_paras(p : tnamedindexitem;arg:pointer);
var
href : treference;
list : taasmoutput;
begin
list:=taasmoutput(arg);
if (tsym(p).typ=varsym) and
not is_class(tvarsym(p).vartype.def) and
tvarsym(p).vartype.def.needs_inittable then
begin
if (tvarsym(p).varspez=vs_value) then
begin
if assigned(tvarsym(p).localvarsym) then
reference_reset_base(href,procinfo.framepointer,
-tvarsym(p).localvarsym.address+tvarsym(p).localvarsym.owner.address_fixup)
else
reference_reset_base(href,procinfo.framepointer,tvarsym(p).address+procinfo.para_offset);
cg.g_decrrefcount(list,tvarsym(p).vartype.def,href);
end;
end;
end;
{ Initialize temp ansi/widestrings,interfaces }
procedure inittempvariables(list:taasmoutput);
var
hp : ptemprecord;
href : treference;
begin
hp:=tg.templist;
while assigned(hp) do
begin
if hp^.temptype in [tt_ansistring,tt_freeansistring,
tt_widestring,tt_freewidestring,
tt_interfacecom,tt_freeinterfacecom] then
begin
if (cs_implicit_exceptions in aktmoduleswitches) then
procinfo.flags:=procinfo.flags or pi_needs_implicit_finally;
reference_reset_base(href,procinfo.framepointer,hp^.pos);
cg.a_load_const_ref(list,OS_ADDR,0,href);
end;
hp:=hp^.next;
end;
end;
procedure finalizetempvariables(list:taasmoutput);
var
hp : ptemprecord;
href : treference;
begin
hp:=tg.templist;
while assigned(hp) do
begin
case hp^.temptype of
tt_ansistring,
tt_freeansistring :
begin
reference_reset_base(href,procinfo.framepointer,hp^.pos);
cg.a_paramaddr_ref(list,href,paramanager.getintparaloc(1));
cg.a_call_name(list,'FPC_ANSISTR_DECR_REF');
end;
tt_widestring,
tt_freewidestring :
begin
reference_reset_base(href,procinfo.framepointer,hp^.pos);
cg.a_paramaddr_ref(list,href,paramanager.getintparaloc(2));
cg.a_call_name(list,'FPC_WIDESTR_DECR_REF');
end;
tt_interfacecom :
begin
reference_reset_base(href,procinfo.framepointer,hp^.pos);
cg.a_paramaddr_ref(list,href,paramanager.getintparaloc(2));
cg.a_call_name(list,'FPC_INTF_DECR_REF');
end;
end;
hp:=hp^.next;
end;
end;
procedure handle_return_value(list:TAAsmoutput; inlined : boolean;var uses_acc,uses_acchi,uses_fpu : boolean);
var
href : treference;
hreg,r,r2 : tregister;
cgsize : TCGSize;
begin
if not is_void(aktprocdef.rettype.def) then
begin
if (tfuncretsym(aktprocdef.funcretsym).funcretstate<>vs_assigned) and
(not inlined) then
CGMessage(sym_w_function_result_not_set);
reference_reset_base(href,procinfo.framepointer,procinfo.return_offset);
cgsize:=def_cgsize(aktprocdef.rettype.def);
case aktprocdef.rettype.def.deftype of
orddef,
enumdef :
begin
uses_acc:=true;
{$WARNING accumulator was replaced by return_result_reg}
{Here, we return the function result. In most architectures, the value is
passed into the accumulator, but in a windowed architecure like sparc a
function returns in a register and the caller receives it in an other one}
r.enum:=return_result_reg;
cg.a_reg_alloc(list,r);
{$ifndef cpu64bit}
if cgsize in [OS_64,OS_S64] then
begin
uses_acchi:=true;
r.enum:=accumulatorhigh;
cg.a_reg_alloc(list,r);
r.enum:=accumulator;
r2.enum:=accumulatorhigh;
cg64.a_load64_ref_reg(list,href,joinreg64(r,r2));
end
else
{$endif cpu64bit}
begin
{$WARNING accumulator was replaced by return_result_reg}
{Here, we return the function result. In most architectures, the value is
passed into the accumulator, but in a windowed architecure like sparc a
function returns in a register and the caller receives it in an other one}
r.enum:=return_result_reg;
hreg:=rg.makeregsize(r,cgsize);
cg.a_load_ref_reg(list,cgsize,href,hreg);
end;
end;
floatdef :
begin
uses_fpu := true;
r.enum:=fpu_result_reg;
cg.a_loadfpu_ref_reg(list,cgsize,href,r);
end;
else
begin
if paramanager.ret_in_acc(aktprocdef.rettype.def,aktprocdef.proccalloption) then
begin
uses_acc:=true;
r.enum:=accumulator;
cg.a_reg_alloc(list,r);
{$ifndef cpu64bit}
{ Win32 can return records in EAX:EDX }
if cgsize in [OS_64,OS_S64] then
begin
uses_acchi:=true;
r.enum:=accumulatorhigh;
cg.a_reg_alloc(list,r);
r.enum:=accumulator;
r2.enum:=accumulatorhigh;
cg64.a_load64_ref_reg(list,href,joinreg64(r,r2));
end
else
{$endif cpu64bit}
r.enum:=accumulator;
cg.a_load_ref_reg(list,cgsize,href,r);
end
end;
end;
end;
end;
procedure handle_fast_exit_return_value(list:TAAsmoutput);
var
href : treference;
hreg : tregister;
cgsize : TCGSize;
r,r2 : Tregister;
begin
if not is_void(aktprocdef.rettype.def) then
begin
reference_reset_base(href,procinfo.framepointer,procinfo.return_offset);
cgsize:=def_cgsize(aktprocdef.rettype.def);
case aktprocdef.rettype.def.deftype of
orddef,
enumdef :
begin
{$ifndef cpu64bit}
r.enum:=accumulator;
r2.enum:=accumulatorhigh;
if cgsize in [OS_64,OS_S64] then
cg64.a_load64_reg_ref(list,joinreg64(r,r2),href)
else
{$endif cpu64bit}
begin
hreg:=rg.makeregsize(r,cgsize);
cg.a_load_reg_ref(list,cgsize,hreg,href);
end;
end;
floatdef :
begin
r.enum:=fpu_result_reg;
cg.a_loadfpu_reg_ref(list,cgsize,r,href);
end;
else
begin
r.enum:=accumulator;
if paramanager.ret_in_acc(aktprocdef.rettype.def,aktprocdef.proccalloption) then
cg.a_load_reg_ref(list,cgsize,r,href);
end;
end;
end;
end;
procedure genentrycode(list : TAAsmoutput;
make_global:boolean;
stackframe:longint;
var parasize:longint;var nostackframe:boolean;
inlined : boolean);
var
hs : string;
href : treference;
stackalloclist : taasmoutput;
hp : tparaitem;
paraloc : tparalocation;
r:Tregister;
begin
if not inlined then
stackalloclist:=taasmoutput.Create;
{ the actual stack allocation code, symbol entry point and
gdb stabs information is generated AFTER the rest of this
code, since temp. allocation might occur before - carl
}
{ for the save all registers we can simply use a pusha,popa which
push edi,esi,ebp,esp(ignored),ebx,edx,ecx,eax }
if (po_saveregisters in aktprocdef.procoptions) then
cg.g_save_all_registers(list)
else
{ should we save edi,esi,ebx like C ? }
if (po_savestdregs in aktprocdef.procoptions) then
cg.g_save_standard_registers(list,aktprocdef.usedregisters);
{ the actual profile code can clobber some registers,
therefore if the context must be saved, do it before
the actual call to the profile code
}
if (cs_profile in aktmoduleswitches)
and not(po_assembler in aktprocdef.procoptions)
and not(inlined) then
begin
{ non-win32 can call mcout even in main }
if not (target_info.system in [system_i386_win32,system_i386_wdosx]) then
cg.g_profilecode(list)
else
{ wdosx, and win32 should not call mcount before monstartup has been called }
if not (aktprocdef.proctypeoption=potype_proginit) then
cg.g_profilecode(list);
end;
{ a constructor needs a help procedure }
if (aktprocdef.proctypeoption=potype_constructor) then
cg.g_call_constructor_helper(list);
{ don't load ESI, does the caller }
{ we must do it for local function }
{ that can be called from a foreach_static }
{ of another object than self !! PM }
if assigned(procinfo._class) and { !!!!! shouldn't we load ESI always? }
(lexlevel>normal_function_level) then
cg.g_maybe_loadself(list);
{ When message method contains self as a parameter,
we must load it into ESI }
If (po_containsself in aktprocdef.procoptions) then
begin
r.enum:=self_pointer_reg;
list.concat(tai_regalloc.Alloc(r));
reference_reset_base(href,procinfo.framepointer,procinfo.selfpointer_offset);
cg.a_load_ref_reg(list,OS_ADDR,href,r);
end;
if not is_void(aktprocdef.rettype.def) then
begin
{ for now the pointer to the result can't be a register }
if not(paramanager.ret_in_reg(aktprocdef.rettype.def,aktprocdef.proccalloption)) then
begin
paraloc:=paramanager.getfuncretparaloc(aktprocdef);
reference_reset_base(href,procinfo.framepointer,procinfo.return_offset);
case paraloc.loc of
LOC_CREGISTER,
LOC_REGISTER:
if not(paraloc.size in [OS_64,OS_S64]) then
cg.a_load_reg_ref(list,paraloc.size,paraloc.register,href)
else
cg64.a_load64_reg_ref(list,paraloc.register64,href);
LOC_CFPUREGISTER,
LOC_FPUREGISTER:
cg.a_load_reg_ref(list,paraloc.size,paraloc.register,href);
LOC_CMMREGISTER,
LOC_MMREGISTER:
cg.a_loadmm_reg_ref(list,paraloc.register,href);
end;
end;
{ initialize return value }
if (aktprocdef.rettype.def.needs_inittable) then
begin
if (cs_implicit_exceptions in aktmoduleswitches) then
procinfo.flags:=procinfo.flags or pi_needs_implicit_finally;
reference_reset_base(href,procinfo.framepointer,procinfo.return_offset);
cg.g_initialize(list,aktprocdef.rettype.def,href,paramanager.ret_in_param(aktprocdef.rettype.def,aktprocdef.proccalloption));
end;
end;
{ initialisize local data like ansistrings }
case aktprocdef.proctypeoption of
potype_unitinit:
begin
{ using current_module.globalsymtable is hopefully }
{ more robust than symtablestack and symtablestack.next }
tsymtable(current_module.globalsymtable).foreach_static({$ifndef TP}@{$endif}initialize_data,list);
tsymtable(current_module.localsymtable).foreach_static({$ifndef TP}@{$endif}initialize_data,list);
end;
{ units have seperate code for initilization and finalization }
potype_unitfinalize: ;
{ program init/final is generated in separate procedure }
potype_proginit: ;
else
aktprocdef.localst.foreach_static({$ifndef TP}@{$endif}initialize_data,list);
end;
{ initialisizes temp. ansi/wide string data }
inittempvariables(list);
{ generate copies of call by value parameters }
if not(po_assembler in aktprocdef.procoptions) then
aktprocdef.parast.foreach_static({$ifndef TP}@{$endif}copyvalueparas,list);
if assigned(aktprocdef.parast) then
begin
aktprocdef.parast.foreach_static({$ifndef TP}@{$endif}init_paras,list);
{ move register parameters which aren't regable into memory }
{ we do this after init_paras because it saves some code in init_paras if parameters are in register }
{ instead in memory }
hp:=tparaitem(procinfo.procdef.para.first);
while assigned(hp) do
begin
if Tvarsym(hp.parasym).reg.enum>lastreg then
internalerror(200301081);
if (tvarsym(hp.parasym).reg.enum<>R_NO) then
case hp.paraloc.loc of
LOC_CREGISTER,
LOC_REGISTER:
// if not(hp.paraloc.size in [OS_S64,OS_64]) then
cg.a_load_reg_reg(list,hp.paraloc.size,OS_32,hp.paraloc.register,tvarsym(hp.parasym).reg);
// else
// cg64.a_load64_reg_reg(list,hp.paraloc.register64,tvarsym(hp.parasym).reg);
LOC_CFPUREGISTER,
LOC_FPUREGISTER:
cg.a_loadfpu_reg_reg(list,hp.paraloc.register,tvarsym(hp.parasym).reg);
end
else if (hp.paraloc.loc in [LOC_REGISTER,LOC_FPUREGISTER,LOC_MMREGISTER,
LOC_CREGISTER,LOC_CFPUREGISTER,LOC_CMMREGISTER]) and
(tvarsym(hp.parasym).reg.enum=R_NO) then
begin
reference_reset_base(href,procinfo.framepointer,tvarsym(hp.parasym).address+
tvarsym(hp.parasym).owner.address_fixup);
case hp.paraloc.loc of
LOC_CREGISTER,
LOC_REGISTER:
if not(hp.paraloc.size in [OS_S64,OS_64]) then
cg.a_load_reg_ref(list,hp.paraloc.size,hp.paraloc.register,href)
else
cg64.a_load64_reg_ref(list,hp.paraloc.register64,href);
LOC_FPUREGISTER,
LOC_CFPUREGISTER:
cg.a_loadfpu_reg_ref(list,hp.paraloc.size,hp.paraloc.register,href);
else
internalerror(2002081302);
end;
end;
hp:=tparaitem(hp.next);
end;
end;
if (not inlined) then
begin
{ call startup helpers from main program }
if (aktprocdef.proctypeoption=potype_proginit) then
begin
{ initialize profiling for win32 }
if (target_info.system in [system_i386_win32,system_i386_wdosx]) and
(cs_profile in aktmoduleswitches) then
begin
reference_reset_symbol(href,objectlibrary.newasmsymbol('etext'),0);
cg.a_paramaddr_ref(list,href,paraloc);
reference_reset_symbol(href,objectlibrary.newasmsymbol('__image_base__'),0);
cg.a_paramaddr_ref(list,href,paraloc);
cg.a_call_name(list,'_monstartup');
end;
{ initialize units }
cg.a_call_name(list,'FPC_INITIALIZEUNITS');
end;
{ do we need an exception frame because of ansi/widestrings/interfaces ? }
if ((procinfo.flags and pi_needs_implicit_finally)<>0) and
{ but it's useless in init/final code of units }
not(aktprocdef.proctypeoption in [potype_unitfinalize,potype_unitinit]) then
begin
include(rg.usedinproc,accumulator);
tg.GetTemp(list,JMP_BUF_SIZE,tt_noreuse,procinfo.exception_jmp_ref);
tg.GetTemp(list,12,tt_noreuse,procinfo.exception_env_ref);
tg.GetTemp(list,sizeof(aword),tt_noreuse,procinfo.exception_result_ref);
new_exception(list,procinfo.exception_jmp_ref,
procinfo.exception_env_ref,
procinfo.exception_result_ref,1,aktexitlabel);
{ probably we've to reload self here }
cg.g_maybe_loadself(list);
end;
{$ifdef GDB}
if (cs_debuginfo in aktmoduleswitches) then
list.concat(Tai_force_line.Create);
{$endif GDB}
end;
if inlined then
load_regvars(list,nil);
{************************* Stack allocation **************************}
{ and symbol entry point as well as debug information }
{ will be inserted in front of the rest of this list. }
{ Insert alignment and assembler names }
if not inlined then
begin
{ Align, gprof uses 16 byte granularity }
if (cs_profile in aktmoduleswitches) then
stackalloclist.concat(Tai_align.Create(16))
else
stackalloclist.concat(Tai_align.Create(aktalignment.procalign));
if (cs_profile in aktmoduleswitches) or
(aktprocdef.owner.symtabletype=globalsymtable) or
(assigned(procinfo._class) and (procinfo._class.owner.symtabletype=globalsymtable)) then
make_global:=true;
if make_global or ((procinfo.flags and pi_is_global) <> 0) then
aktprocsym.is_global := True;
{$ifdef GDB}
if (cs_debuginfo in aktmoduleswitches) then
begin
aktprocdef.concatstabto(stackalloclist);
aktprocsym.isstabwritten:=true;
end;
{$endif GDB}
repeat
hs:=aktprocdef.aliasnames.getfirst;
if hs='' then
break;
{$ifdef GDB}
if (cs_debuginfo in aktmoduleswitches) and
target_info.use_function_relative_addresses then
stackalloclist.concat(Tai_stab_function_name.Create(strpnew(hs)));
{$endif GDB}
if make_global then
stackalloclist.concat(Tai_symbol.Createname_global(hs,0))
else
stackalloclist.concat(Tai_symbol.Createname(hs,0));
until false;
stackframe:=stackframe+tg.gettempsize;
{$ifndef m68k}
{ give a warning if the limit of local variables is reached }
if stackframe > maxlocalsize then
Message(cg_w_localsize_too_big);
{$endif}
{$ifndef powerpc}
{ at least for the ppc this applies always, so this code isn't usable (FK) }
{ omit stack frame ? }
if procinfo.framepointer.enum>lastreg then
internalerror(2003010801);
if (procinfo.framepointer.enum=STACK_POINTER_REG) then
begin
CGMessage(cg_d_stackframe_omited);
nostackframe:=true;
if (aktprocdef.proctypeoption in [potype_unitinit,potype_proginit,potype_unitfinalize]) then
parasize:=0
else
parasize:=aktprocdef.parast.datasize+procinfo.para_offset-4;
if stackframe<>0 then
cg.g_stackpointer_alloc(stackalloclist,stackframe);
end
else
{$endif powerpc}
begin
nostackframe:=false;
if (aktprocdef.proctypeoption in [potype_unitinit,potype_proginit,potype_unitfinalize]) then
parasize:=0
else
parasize:=aktprocdef.parast.datasize+procinfo.para_offset-target_info.first_parm_offset;
if (po_interrupt in aktprocdef.procoptions) then
cg.g_interrupt_stackframe_entry(stackalloclist);
cg.g_stackframe_entry(stackalloclist,stackframe);
{ never call stack checking before the standard system unit
has not been initialized
}
if (cs_check_stack in aktlocalswitches) and (aktprocdef.proctypeoption<>potype_proginit) then
cg.g_stackcheck(stackalloclist,stackframe);
end;
list.insertlist(stackalloclist);
stackalloclist.free;
end;
{************************* End Stack allocation **************************}
end;
procedure genexitcode(list : TAAsmoutput;parasize:longint;nostackframe,inlined:boolean);
var
{$ifdef GDB}
stabsendlabel : tasmlabel;
mangled_length : longint;
p : pchar;
st : string[2];
{$endif GDB}
okexitlabel,
noreraiselabel,nodestroycall : tasmlabel;
tmpreg : tregister;
href : treference;
usesacc,
usesacchi,
usesself,usesfpu : boolean;
pd : tprocdef;
r,r2:Tregister;
begin
if aktexit2label.is_used and
((procinfo.flags and (pi_needs_implicit_finally or pi_uses_exceptions)) <> 0) then
begin
cg.a_jmp_always(list,aktexitlabel);
cg.a_label(list,aktexit2label);
handle_fast_exit_return_value(list);
end;
if aktexitlabel.is_used then
list.concat(Tai_label.Create(aktexitlabel));
cleanup_regvars(list);
{ call the destructor help procedure }
if (aktprocdef.proctypeoption=potype_destructor) and
assigned(procinfo._class) then
cg.g_call_destructor_helper(list);
{ finalize temporary data }
finalizetempvariables(list);
{ finalize local data like ansistrings}
case aktprocdef.proctypeoption of
potype_unitfinalize:
begin
{ using current_module.globalsymtable is hopefully }
{ more robust than symtablestack and symtablestack.next }
tsymtable(current_module.globalsymtable).foreach_static({$ifndef TP}@{$endif}finalize_data,list);
tsymtable(current_module.localsymtable).foreach_static({$ifndef TP}@{$endif}finalize_data,list);
end;
{ units/progs have separate code for initialization and finalization }
potype_unitinit: ;
{ program init/final is generated in separate procedure }
potype_proginit: ;
else
aktprocdef.localst.foreach_static({$ifndef TP}@{$endif}finalize_data,list);
end;
{ finalize paras data }
if assigned(aktprocdef.parast) then
aktprocdef.parast.foreach_static({$ifndef TP}@{$endif}final_paras,list);
{ do we need to handle exceptions because of ansi/widestrings ? }
if not inlined and
((procinfo.flags and pi_needs_implicit_finally)<>0) and
{ but it's useless in init/final code of units }
not(aktprocdef.proctypeoption in [potype_unitfinalize,potype_unitinit]) then
begin
{ the exception helper routines modify all registers }
aktprocdef.usedregisters:=all_registers;
objectlibrary.getlabel(noreraiselabel);
free_exception(list,
procinfo.exception_jmp_ref,
procinfo.exception_env_ref,
procinfo.exception_result_ref,0,
noreraiselabel,false);
tg.Ungettemp(list,procinfo.exception_jmp_ref);
tg.Ungettemp(list,procinfo.exception_env_ref);
tg.Ungettemp(list,procinfo.exception_result_ref);
if (aktprocdef.proctypeoption=potype_constructor) then
begin
if assigned(procinfo._class) then
begin
pd:=procinfo._class.searchdestructor;
if assigned(pd) then
begin
objectlibrary.getlabel(nodestroycall);
reference_reset_base(href,procinfo.framepointer,procinfo.selfpointer_offset);
cg.a_cmp_const_ref_label(list,OS_ADDR,OC_EQ,0,href,nodestroycall);
r.enum:=self_pointer_reg;
if is_class(procinfo._class) then
begin
cg.a_param_const(list,OS_INT,1,paramanager.getintparaloc(2));
cg.a_param_reg(list,OS_ADDR,r,paramanager.getintparaloc(1));
end
else if is_object(procinfo._class) then
begin
cg.a_param_reg(list,OS_ADDR,r,paramanager.getintparaloc(2));
reference_reset_symbol(href,objectlibrary.newasmsymbol(procinfo._class.vmt_mangledname),0);
cg.a_paramaddr_ref(list,href,paramanager.getintparaloc(1));
end
else
Internalerror(200006164);
if (po_virtualmethod in pd.procoptions) then
begin
reference_reset_base(href,r,0);
tmpreg:=cg.get_scratch_reg_address(list);
cg.a_load_ref_reg(list,OS_ADDR,href,tmpreg);
reference_reset_base(href,tmpreg,procinfo._class.vmtmethodoffset(pd.extnumber));
cg.free_scratch_reg(list,tmpreg);
cg.a_call_ref(list,href);
end
else
cg.a_call_name(list,pd.mangledname);
{ not necessary because the result is never assigned in the
case of an exception (FK) }
cg.a_label(list,nodestroycall);
end;
end
end
else
begin
{ no constructor }
{ must be the return value finalized before reraising the exception? }
if (not is_void(aktprocdef.rettype.def)) and
(aktprocdef.rettype.def.needs_inittable) and
((aktprocdef.rettype.def.deftype<>objectdef) or
not is_class(aktprocdef.rettype.def)) then
begin
reference_reset_base(href,procinfo.framepointer,procinfo.return_offset);
cg.g_finalize(list,aktprocdef.rettype.def,href,paramanager.ret_in_param(aktprocdef.rettype.def,aktprocdef.proccalloption));
end;
end;
cg.a_call_name(list,'FPC_RERAISE');
cg.a_label(list,noreraiselabel);
end;
{ call __EXIT for main program }
if (not DLLsource) and
(not inlined) and
(aktprocdef.proctypeoption=potype_proginit) then
begin
cg.a_call_name(list,'FPC_DO_EXIT');
end;
{ handle return value, this is not done for assembler routines when
they didn't reference the result variable }
usesacc:=false;
usesacchi:=false;
usesself:=false;
if not(po_assembler in aktprocdef.procoptions) or
(assigned(aktprocdef.funcretsym) and
(tfuncretsym(aktprocdef.funcretsym).refcount>1)) then
begin
if (aktprocdef.proctypeoption<>potype_constructor) then
handle_return_value(list,inlined,usesacc,usesacchi,usesfpu)
else
begin
{ successful constructor deletes the zero flag }
{ and returns self in eax }
{ eax must be set to zero if the allocation failed !!! }
objectlibrary.getlabel(okexitlabel);
cg.a_jmp_always(list,okexitlabel);
cg.a_label(list,faillabel);
cg.g_call_fail_helper(list);
cg.a_label(list,okexitlabel);
{ for classes this is done after the call to }
{ AfterConstruction }
if is_object(procinfo._class) then
begin
r.enum:=self_pointer_reg;
r2.enum:=accumulator;
cg.a_reg_alloc(list,r2);
cg.a_load_reg_reg(list,OS_ADDR,OS_ADDR,r,r2);
usesacc:=true;
end;
{$ifdef i386}
r.enum:=R_ESI;
list.concat(taicpu.op_reg_reg(A_TEST,S_L,r,r));
{$else}
{$warning constructor returns in flags for i386}
{$endif i386}
usesself:=true;
end;
end;
if aktexit2label.is_used and not aktexit2label.is_set then
cg.a_label(list,aktexit2label);
{$ifdef GDB}
if ((cs_debuginfo in aktmoduleswitches) and not inlined) then
begin
objectlibrary.getlabel(stabsendlabel);
cg.a_label(list,stabsendlabel);
end;
{$endif GDB}
{ remove copies of call by value parameters when there are also
registers saved on the stack }
if ((po_saveregisters in aktprocdef.procoptions) or
(po_savestdregs in aktprocdef.procoptions)) and
not(po_assembler in aktprocdef.procoptions) then
aktprocdef.parast.foreach_static({$ifndef TP}@{$endif}removevalueparas,list);
{ for the save all registers we can simply use a pusha,popa which
push edi,esi,ebp,esp(ignored),ebx,edx,ecx,eax }
if (po_saveregisters in aktprocdef.procoptions) then
cg.g_restore_all_registers(list,usesself,usesacc,usesacchi)
else
{ should we restore edi ? }
if (po_savestdregs in aktprocdef.procoptions) then
cg.g_restore_standard_registers(list,aktprocdef.usedregisters);
{ remove stackframe }
if not inlined then
begin
if (not nostackframe) then
cg.g_restore_frame_pointer(list)
else
if (tg.gettempsize<>0) then
begin
r.enum:=stack_pointer_reg;
cg.a_op_const_reg(list,OP_ADD,tg.gettempsize,r);
end;
end;
{ at last, the return is generated }
if not inlined then
begin
if (po_interrupt in aktprocdef.procoptions) then
cg.g_interrupt_stackframe_exit(list,usesself,usesacc,usesacchi)
else
begin
{$ifndef i386}
{ give a warning if the limit of parameters allowed for
certain processors is reached.
}
if (parasize > maxparasize) then
Message(cg_w_parasize_too_big);
{$endif}
cg.g_return_from_proc(list,parasize);
end;
end;
if not inlined then
list.concat(Tai_symbol_end.Createname(aktprocdef.mangledname));
{$ifdef GDB}
if (cs_debuginfo in aktmoduleswitches) and not inlined then
begin
if assigned(procinfo._class) then
if (not assigned(procinfo.parent) or
not assigned(procinfo.parent._class)) then
begin
if (po_classmethod in aktprocdef.procoptions) or
((po_virtualmethod in aktprocdef.procoptions) and
(potype_constructor=aktprocdef.proctypeoption)) or
(po_staticmethod in aktprocdef.procoptions) then
begin
list.concat(Tai_stabs.Create(strpnew(
'"pvmt:p'+tstoreddef(pvmttype.def).numberstring+'",'+
tostr(N_tsym)+',0,0,'+tostr(procinfo.selfpointer_offset))));
end
else
begin
if not(is_class(procinfo._class)) then
st:='v'
else
st:='p';
list.concat(Tai_stabs.Create(strpnew(
'"$t:'+st+procinfo._class.numberstring+'",'+
tostr(N_tsym)+',0,0,'+tostr(procinfo.selfpointer_offset))));
end;
end
else
begin
if not is_class(procinfo._class) then
st:='*'
else
st:='';
list.concat(Tai_stabs.Create(strpnew(
'"$t:r'+st+procinfo._class.numberstring+'",'+
tostr(N_RSYM)+',0,0,'+tostr(stab_regindex[SELF_POINTER_REG]))));
end;
{ define calling EBP as pseudo local var PM }
{ this enables test if the function is a local one !! }
if assigned(procinfo.parent) and (lexlevel>normal_function_level) then
list.concat(Tai_stabs.Create(strpnew(
'"parent_ebp:'+tstoreddef(voidpointertype.def).numberstring+'",'+
tostr(N_LSYM)+',0,0,'+tostr(procinfo.framepointer_offset))));
if (not is_void(aktprocdef.rettype.def)) then
begin
if paramanager.ret_in_param(aktprocdef.rettype.def,aktprocdef.proccalloption) then
list.concat(Tai_stabs.Create(strpnew(
'"'+aktprocsym.name+':X*'+tstoreddef(aktprocdef.rettype.def).numberstring+'",'+
tostr(N_tsym)+',0,0,'+tostr(procinfo.return_offset))))
else
list.concat(Tai_stabs.Create(strpnew(
'"'+aktprocsym.name+':X'+tstoreddef(aktprocdef.rettype.def).numberstring+'",'+
tostr(N_tsym)+',0,0,'+tostr(procinfo.return_offset))));
if (m_result in aktmodeswitches) then
if paramanager.ret_in_param(aktprocdef.rettype.def,aktprocdef.proccalloption) then
list.concat(Tai_stabs.Create(strpnew(
'"RESULT:X*'+tstoreddef(aktprocdef.rettype.def).numberstring+'",'+
tostr(N_tsym)+',0,0,'+tostr(procinfo.return_offset))))
else
list.concat(Tai_stabs.Create(strpnew(
'"RESULT:X'+tstoreddef(aktprocdef.rettype.def).numberstring+'",'+
tostr(N_tsym)+',0,0,'+tostr(procinfo.return_offset))));
end;
mangled_length:=length(aktprocdef.mangledname);
getmem(p,2*mangled_length+50);
strpcopy(p,'192,0,0,');
strpcopy(strend(p),aktprocdef.mangledname);
if (target_info.use_function_relative_addresses) then
begin
strpcopy(strend(p),'-');
strpcopy(strend(p),aktprocdef.mangledname);
end;
list.concat(Tai_stabn.Create(strnew(p)));
{List.concat(Tai_stabn.Create(strpnew('192,0,0,'
+aktprocdef.mangledname))));
p[0]:='2';p[1]:='2';p[2]:='4';
strpcopy(strend(p),'_end');}
strpcopy(p,'224,0,0,'+stabsendlabel.name);
if (target_info.use_function_relative_addresses) then
begin
strpcopy(strend(p),'-');
strpcopy(strend(p),aktprocdef.mangledname);
end;
list.concatlist(withdebuglist);
list.concat(Tai_stabn.Create(strnew(p)));
{ strpnew('224,0,0,'
+aktprocdef.mangledname+'_end'))));}
freemem(p,2*mangled_length+50);
end;
{$endif GDB}
if inlined then
cleanup_regvars(list);
end;
procedure genimplicitunitinit(list : TAAsmoutput);
begin
{$ifdef GDB}
if (cs_debuginfo in aktmoduleswitches) and
target_info.use_function_relative_addresses then
list.concat(Tai_stab_function_name.Create(strpnew('INIT$$'+current_module.modulename^)));
{$endif GDB}
list.concat(Tai_symbol.Createname_global('INIT$$'+current_module.modulename^,0));
list.concat(Tai_symbol.Createname_global(target_info.cprefix+current_module.modulename^+'_init',0));
{ using current_module.globalsymtable is hopefully }
{ more robust than symtablestack and symtablestack.next }
if assigned(current_module.globalsymtable) then
tsymtable(current_module.globalsymtable).foreach_static({$ifdef FPCPROCVAR}@{$endif}finalize_data,list);
tsymtable(current_module.localsymtable).foreach_static({$ifdef FPCPROCVAR}@{$endif}finalize_data,list);
cg.g_return_from_proc(list,0);
end;
procedure genimplicitunitfinal(list : TAAsmoutput);
begin
{$ifdef GDB}
if (cs_debuginfo in aktmoduleswitches) and
target_info.use_function_relative_addresses then
list.concat(Tai_stab_function_name.Create(strpnew('FINALIZE$$'+current_module.modulename^)));
{$endif GDB}
list.concat(Tai_symbol.Createname_global('FINALIZE$$'+current_module.modulename^,0));
list.concat(Tai_symbol.Createname_global(target_info.cprefix+current_module.modulename^+'_finalize',0));
{ using current_module.globalsymtable is hopefully }
{ more robust than symtablestack and symtablestack.next }
if assigned(current_module.globalsymtable) then
tsymtable(current_module.globalsymtable).foreach_static({$ifdef FPCPROCVAR}@{$endif}finalize_data,list);
tsymtable(current_module.localsymtable).foreach_static({$ifdef FPCPROCVAR}@{$endif}finalize_data,list);
cg.g_return_from_proc(list,0);
end;
end.
{
$Log$
Revision 1.73 2003-01-08 18:43:56 daniel
* Tregister changed into a record
Revision 1.72 2002/12/29 23:51:43 florian
* web bug 2214 fixed: ie 10 in const array constructors
Revision 1.71 2002/12/24 15:56:50 peter
* stackpointer_alloc added for adjusting ESP. Win32 needs
this for the pageprotection
Revision 1.70 2002/12/05 14:39:21 florian
* added missing then, Carl did you really a make fullcycle :) ?
Revision 1.69 2002/12/03 22:13:39 carl
* bugfix of problems with profile code which clobbers some registers
Revision 1.68 2002/12/01 22:06:59 carl
* warning of portabilitiy problems with parasize / localsize
Revision 1.67 2002/11/30 18:44:57 carl
+ profiling support for Win32
Revision 1.66 2002/11/30 14:39:15 carl
* try to fix profiling for win32
Revision 1.65 2002/11/28 23:28:14 florian
* push_value_para didn't release floatdef locations, fixes tw2045
Revision 1.64 2002/11/27 02:33:19 peter
* copy_value_on_stack method added for cdecl record passing
Revision 1.63 2002/11/25 17:43:18 peter
* splitted defbase in defutil,symutil,defcmp
* merged isconvertable and is_equal into compare_defs(_ext)
* made operator search faster by walking the list only once
Revision 1.62 2002/11/18 17:31:55 peter
* pass proccalloption to ret_in_xxx and push_xxx functions
Revision 1.61 2002/11/17 17:49:08 mazen
+ return_result_reg and function_result_reg are now used, in all plateforms, to pass functions result between called function and its caller. See the explanation of each one
Revision 1.60 2002/11/17 16:31:56 carl
* memory optimization (3-4%) : cleanup of tai fields,
cleanup of tdef and tsym fields.
* make it work for m68k
Revision 1.59 2002/11/15 01:58:51 peter
* merged changes from 1.0.7 up to 04-11
- -V option for generating bug report tracing
- more tracing for option parsing
- errors for cdecl and high()
- win32 import stabs
- win32 records<=8 are returned in eax:edx (turned off by default)
- heaptrc update
- more info for temp management in .s file with EXTDEBUG
Revision 1.58 2002/11/10 19:07:45 mazen
* SPARC calling mechanism almost OK (as in GCC./mppcsparc )
Revision 1.57 2002/11/03 20:22:40 mazen
* parameter handling updated
Revision 1.56 2002/10/16 19:01:43 peter
+ $IMPLICITEXCEPTIONS switch to turn on/off generation of the
implicit exception frames for procedures with initialized variables
and for constructors. The default is on for compatibility
Revision 1.55 2002/10/14 19:42:33 peter
* only use init tables for threadvars
Revision 1.54 2002/10/06 19:41:30 peter
* Add finalization of typed consts
* Finalization of globals in the main program
Revision 1.53 2002/10/05 15:18:42 carl
* fix heap leaks
Revision 1.52 2002/09/30 07:00:46 florian
* fixes to common code to get the alpha compiler compiled applied
Revision 1.51 2002/09/22 14:02:35 carl
* stack checking cannot be called before system unit is initialized
* MC68020 define
Revision 1.50 2002/09/17 18:54:03 jonas
* a_load_reg_reg() now has two size parameters: source and dest. This
allows some optimizations on architectures that don't encode the
register size in the register name.
Revision 1.49 2002/09/10 21:48:30 florian
* improved handling of procedures with register calling conventions
Revision 1.48 2002/09/07 15:25:03 peter
* old logs removed and tabs fixed
Revision 1.47 2002/09/02 18:44:48 peter
* fixed (not) pushing of empty parameters
* fixed implicit initialization/finalization generation
* fixed/optimized local copy of value arguments init/final
Revision 1.46 2002/09/01 19:27:34 peter
* use index register when available for generating a reference with
only a signle register. Using the base register could possibly
destroy the framepointer
Revision 1.45 2002/09/01 18:50:20 peter
* fixed maybe_save that did not support a reference with only
a index register. It now also updates the location with the new
base register only
Revision 1.44 2002/09/01 14:42:41 peter
* removevaluepara added to fix the stackpointer so restoring of
saved registers works
Revision 1.43 2002/08/25 19:25:18 peter
* sym.insert_in_data removed
* symtable.insertvardata/insertconstdata added
* removed insert_in_data call from symtable.insert, it needs to be
called separatly. This allows to deref the address calculation
* procedures now calculate the parast addresses after the procedure
directives are parsed. This fixes the cdecl parast problem
* push_addr_param has an extra argument that specifies if cdecl is used
or not
Revision 1.42 2002/08/24 18:38:26 peter
* really use tt_noreuse for exception frame buffers
Revision 1.41 2002/08/23 16:14:49 peter
* tempgen cleanup
* tt_noreuse temp type added that will be used in genentrycode
Revision 1.40 2002/08/18 10:42:37 florian
* remaining assembler writer bugs fixed, the errors in the
system unit are inline assembler problems
Revision 1.39 2002/08/17 09:23:36 florian
* first part of procinfo rewrite
Revision 1.38 2002/08/16 14:24:57 carl
* issameref() to test if two references are the same (then emit no opcodes)
+ ret_in_reg to replace ret_in_acc
(fix some register allocation bugs at the same time)
+ save_std_register now has an extra parameter which is the
usedinproc registers
Revision 1.37 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 1.36 2002/08/14 19:25:09 carl
* fix Florian's last commit for m68k compilation
Revision 1.35 2002/08/13 21:40:56 florian
* more fixes for ppc calling conventions
Revision 1.34 2002/08/12 15:08:39 carl
+ stab register indexes for powerpc (moved from gdb to cpubase)
+ tprocessor enumeration moved to cpuinfo
+ linker in target_info is now a class
* many many updates for m68k (will soon start to compile)
- removed some ifdef or correct them for correct cpu
Revision 1.33 2002/08/11 14:32:27 peter
* renamed current_library to objectlibrary
Revision 1.32 2002/08/11 13:24:12 peter
* saving of asmsymbols in ppu supported
* asmsymbollist global is removed and moved into a new class
tasmlibrarydata that will hold the info of a .a file which
corresponds with a single module. Added librarydata to tmodule
to keep the library info stored for the module. In the future the
objectfiles will also be stored to the tasmlibrarydata class
* all getlabel/newasmsymbol and friends are moved to the new class
Revision 1.31 2002/08/09 19:16:57 carl
* stack allocation is now done separately (at the end) of genentrycode
so temps. can be allocated before.
* fix generic exception handling
Revision 1.30 2002/08/06 20:55:21 florian
* first part of ppc calling conventions fix
Revision 1.29 2002/08/04 19:09:22 carl
+ added generic exception support (still does not work!)
+ more documentation
Revision 1.28 2002/07/29 21:23:42 florian
* more fixes for the ppc
+ wrappers for the tcnvnode.first_* stuff introduced
}
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