mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-04-05 20:48:06 +02:00
536 lines
21 KiB
ObjectPascal
536 lines
21 KiB
ObjectPascal
{
|
|
Copyright (c) 1998-2002 by Florian Klaempfl
|
|
|
|
Generate assembler for constant nodes which are the same for
|
|
all (most) processors
|
|
|
|
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 ncgcon;
|
|
|
|
{$i fpcdefs.inc}
|
|
|
|
interface
|
|
|
|
uses
|
|
aasmbase,
|
|
symtype,
|
|
ncon;
|
|
|
|
type
|
|
tcgrealconstnode = class(trealconstnode)
|
|
procedure pass_generate_code;override;
|
|
end;
|
|
|
|
tcgordconstnode = class(tordconstnode)
|
|
procedure pass_generate_code;override;
|
|
end;
|
|
|
|
tcgpointerconstnode = class(tpointerconstnode)
|
|
procedure pass_generate_code;override;
|
|
end;
|
|
|
|
tcgstringconstnode = class(tstringconstnode)
|
|
procedure pass_generate_code;override;
|
|
protected
|
|
procedure load_dynstring(const strpointerdef: tdef; const elementdef: tdef; const winlikewidestring: boolean); virtual;
|
|
end;
|
|
|
|
tcgsetconstnode = class(tsetconstnode)
|
|
protected
|
|
function emitvarsetconst: tasmsymbol; virtual;
|
|
procedure handlevarsetconst;
|
|
public
|
|
procedure pass_generate_code;override;
|
|
end;
|
|
|
|
tcgnilnode = class(tnilnode)
|
|
procedure pass_generate_code;override;
|
|
end;
|
|
|
|
tcgguidconstnode = class(tguidconstnode)
|
|
procedure pass_generate_code;override;
|
|
end;
|
|
|
|
|
|
implementation
|
|
|
|
uses
|
|
globtype,widestr,systems,
|
|
verbose,globals,cutils,
|
|
aasmcnst,
|
|
symconst,symdef,aasmtai,aasmdata,defutil,
|
|
cpuinfo,cpubase,
|
|
cgbase,cgutils,
|
|
hlcgobj,cclasses
|
|
;
|
|
|
|
|
|
{*****************************************************************************
|
|
TCGREALCONSTNODE
|
|
*****************************************************************************}
|
|
|
|
procedure tcgrealconstnode.pass_generate_code;
|
|
{ I suppose the parser/pass_1 must make sure the generated real }
|
|
{ constants are actually supported by the target processor? (JM) }
|
|
const
|
|
floattype2ait:array[tfloattype] of tairealconsttype=
|
|
(aitrealconst_s32bit,aitrealconst_s64bit,aitrealconst_s80bit,aitrealconst_s80bit,aitrealconst_s64comp,aitrealconst_s64comp,aitrealconst_s128bit);
|
|
|
|
{ Since the value is stored always as bestreal, we share a single pool
|
|
between all float types. This requires type and hiloswapped flag to
|
|
be matched along with the value }
|
|
type
|
|
tfloatkey = record
|
|
value: bestreal;
|
|
typ: tfloattype;
|
|
swapped: boolean;
|
|
end;
|
|
|
|
var
|
|
lastlabel : tasmlabel;
|
|
realait : tairealconsttype;
|
|
entry : PHashSetItem;
|
|
key: tfloatkey;
|
|
{$ifdef ARM}
|
|
hiloswapped : boolean;
|
|
{$endif ARM}
|
|
|
|
begin
|
|
location_reset_ref(location,LOC_CREFERENCE,def_cgsize(resultdef),const_align(resultdef.alignment),[]);
|
|
lastlabel:=nil;
|
|
realait:=floattype2ait[tfloatdef(resultdef).floattype];
|
|
{$ifdef ARM}
|
|
hiloswapped:=is_double_hilo_swapped;
|
|
{$endif ARM}
|
|
{ const already used ? }
|
|
if not assigned(lab_real) then
|
|
begin
|
|
{ there may be gap between record fields, zero it out }
|
|
fillchar(key,sizeof(key),0);
|
|
key.value:=value_real;
|
|
key.typ:=tfloatdef(resultdef).floattype;
|
|
{$ifdef ARM}
|
|
key.swapped:=hiloswapped;
|
|
{$endif ARM}
|
|
entry := current_asmdata.ConstPools[sp_floats].FindOrAdd(@key, sizeof(key));
|
|
|
|
lab_real := TAsmLabel(entry^.Data); // is it needed anymore?
|
|
|
|
{ :-(, we must generate a new entry }
|
|
if not(assigned(lab_real)) then
|
|
begin
|
|
current_asmdata.getglobaldatalabel(lastlabel);
|
|
entry^.Data:=lastlabel;
|
|
lab_real:=lastlabel;
|
|
maybe_new_object_file(current_asmdata.asmlists[al_typedconsts]);
|
|
new_section(current_asmdata.asmlists[al_typedconsts],sec_rodata_norel,lastlabel.name,const_align(resultdef.alignment));
|
|
current_asmdata.asmlists[al_typedconsts].concat(Tai_label.Create(lastlabel));
|
|
case realait of
|
|
aitrealconst_s32bit :
|
|
begin
|
|
current_asmdata.asmlists[al_typedconsts].concat(tai_realconst.create_s32real(ts32real(value_real)));
|
|
end;
|
|
|
|
aitrealconst_s64bit :
|
|
begin
|
|
{$ifdef ARM}
|
|
if hiloswapped then
|
|
current_asmdata.asmlists[al_typedconsts].concat(tai_realconst.create_s64real_hiloswapped(ts64real(value_real)))
|
|
else
|
|
{$endif ARM}
|
|
current_asmdata.asmlists[al_typedconsts].concat(tai_realconst.create_s64real(ts64real(value_real)));
|
|
end;
|
|
|
|
aitrealconst_s80bit :
|
|
begin
|
|
current_asmdata.asmlists[al_typedconsts].concat(tai_realconst.create_s80real(value_real,tfloatdef(resultdef).size));
|
|
end;
|
|
{$ifdef cpufloat128}
|
|
aitrealconst_s128bit :
|
|
begin
|
|
current_asmdata.asmlists[al_typedconsts].concat(tai_realconst.create_s128real(value_real));
|
|
end;
|
|
{$endif cpufloat128}
|
|
|
|
{ the round is necessary for native compilers where comp isn't a float }
|
|
aitrealconst_s64comp :
|
|
if (value_real>9223372036854775807.0) or (value_real<-9223372036854775808.0) then
|
|
message(parser_e_range_check_error)
|
|
else
|
|
current_asmdata.asmlists[al_typedconsts].concat(tai_realconst.create_s64compreal(round(value_real)));
|
|
{$ifndef cpufloat128}
|
|
else
|
|
internalerror(10120);
|
|
{$endif not cpufloat128}
|
|
end;
|
|
end;
|
|
end;
|
|
location.reference.symbol:=lab_real;
|
|
end;
|
|
|
|
{*****************************************************************************
|
|
TCGORDCONSTNODE
|
|
*****************************************************************************}
|
|
|
|
procedure tcgordconstnode.pass_generate_code;
|
|
begin
|
|
location_reset(location,LOC_CONSTANT,def_cgsize(resultdef));
|
|
{$if defined(cpu64bitalu) or defined(cpuhighleveltarget)}
|
|
location.value:=value.svalue;
|
|
{$else cpu64bitalu or cpuhighleveltarget}
|
|
location.value64:=value.svalue;
|
|
{$endif cpu64bitalu or cpuhighleveltarget}
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TCGPOINTERCONSTNODE
|
|
*****************************************************************************}
|
|
|
|
procedure tcgpointerconstnode.pass_generate_code;
|
|
begin
|
|
{ an integer const. behaves as a memory reference }
|
|
location_reset(location,LOC_CONSTANT,OS_ADDR);
|
|
location.value:=PInt(value);
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TCGSTRINGCONSTNODE
|
|
*****************************************************************************}
|
|
|
|
procedure tcgstringconstnode.pass_generate_code;
|
|
var
|
|
lastlabel: tasmlabofs;
|
|
pc: pchar;
|
|
l: longint;
|
|
pool: THashSet;
|
|
entry: PHashSetItem;
|
|
winlikewidestring: boolean;
|
|
elementdef: tdef;
|
|
strpointerdef: tdef;
|
|
datatcb: ttai_typedconstbuilder;
|
|
datadef: tdef;
|
|
|
|
const
|
|
PoolMap: array[tconststringtype] of TConstPoolType = (
|
|
sp_conststr,
|
|
sp_shortstr,
|
|
sp_longstr,
|
|
sp_ansistr,
|
|
sp_widestr,
|
|
sp_unicodestr
|
|
);
|
|
begin
|
|
case cst_type of
|
|
cst_shortstring,
|
|
cst_conststring,
|
|
cst_ansistring:
|
|
begin
|
|
elementdef:=cansichartype;
|
|
strpointerdef:=charpointertype;
|
|
end;
|
|
cst_widestring,
|
|
cst_unicodestring:
|
|
begin
|
|
elementdef:=cwidechartype;
|
|
strpointerdef:=widecharpointertype;
|
|
end;
|
|
else
|
|
internalerror(2014032803);
|
|
end;
|
|
{ for empty ansistrings we could return a constant 0 }
|
|
if (cst_type in [cst_ansistring,cst_widestring,cst_unicodestring]) and (len=0) then
|
|
begin
|
|
location_reset(location,LOC_CONSTANT,def_cgsize(strpointerdef));
|
|
location.value:=0;
|
|
exit;
|
|
end;
|
|
winlikewidestring:=(cst_type=cst_widestring) and (tf_winlikewidestring in target_info.flags);
|
|
{ const already used ? }
|
|
if not assigned(lab_str) then
|
|
begin
|
|
pool := current_asmdata.ConstPools[PoolMap[cst_type]];
|
|
|
|
if cst_type in [cst_widestring, cst_unicodestring] then
|
|
entry := pool.FindOrAdd(pcompilerwidestring(value_str)^.data,len*cwidechartype.size)
|
|
else
|
|
if cst_type = cst_ansistring then
|
|
entry := PHashSetItem(TTagHashSet(pool).FindOrAdd(value_str,len,tstringdef(resultdef).encoding))
|
|
else
|
|
entry := pool.FindOrAdd(value_str,len);
|
|
|
|
lab_str := TAsmLabel(entry^.Data); // is it needed anymore?
|
|
|
|
{ :-(, we must generate a new entry }
|
|
if not assigned(entry^.Data) then
|
|
begin
|
|
datatcb:=ctai_typedconstbuilder.create([tcalo_is_lab,tcalo_make_dead_strippable,tcalo_apply_constalign]);
|
|
case cst_type of
|
|
cst_ansistring:
|
|
begin
|
|
if len=0 then
|
|
InternalError(2008032301) { empty string should be handled above }
|
|
else
|
|
begin
|
|
lastlabel:=datatcb.emit_ansistring_const(current_asmdata.AsmLists[al_typedconsts],value_str,len,tstringdef(resultdef).encoding);
|
|
{ because we hardcode the offset below due to it
|
|
not being stored in the hashset, check here }
|
|
if lastlabel.ofs<>datatcb.get_string_symofs(st_ansistring,false) then
|
|
internalerror(2012051703);
|
|
end;
|
|
{ no contents of the datatcb itself to concatenate,
|
|
as we will just return the address of the emitted
|
|
ansistring constant record }
|
|
end;
|
|
cst_unicodestring,
|
|
cst_widestring:
|
|
begin
|
|
if len=0 then
|
|
InternalError(2008032302) { empty string should be handled above }
|
|
else
|
|
begin
|
|
lastlabel:=datatcb.emit_unicodestring_const(current_asmdata.AsmLists[al_typedconsts],
|
|
value_str,
|
|
tstringdef(resultdef).encoding,
|
|
winlikewidestring);
|
|
{ because we hardcode the offset below due to it
|
|
not being stored in the hashset, check here }
|
|
if lastlabel.ofs<>datatcb.get_string_symofs(tstringdef(resultdef).stringtype,winlikewidestring) then
|
|
internalerror(2012051702);
|
|
end;
|
|
{ no contents of the datatcb itself to concatenate,
|
|
as we will just return the address of the emitted
|
|
unicode/widestring constant record }
|
|
end;
|
|
cst_shortstring:
|
|
begin
|
|
current_asmdata.getglobaldatalabel(lastlabel.lab);
|
|
|
|
{ truncate strings larger than 255 chars }
|
|
if len>255 then
|
|
l:=255
|
|
else
|
|
l:=len;
|
|
{ include length and terminating zero for quick conversion to pchar }
|
|
getmem(pc,l+2);
|
|
move(value_str^,pc[1],l);
|
|
pc[0]:=chr(l);
|
|
pc[l+1]:=#0;
|
|
datadef:=carraydef.getreusable(cansichartype,l+2);
|
|
datatcb.maybe_begin_aggregate(datadef);
|
|
datatcb.emit_tai(Tai_string.Create_pchar(pc,l+2),datadef);
|
|
datatcb.maybe_end_aggregate(datadef);
|
|
current_asmdata.asmlists[al_typedconsts].concatList(
|
|
datatcb.get_final_asmlist(lastlabel.lab,datadef,sec_rodata_norel,lastlabel.lab.name,const_align(sizeof(pint)))
|
|
);
|
|
end;
|
|
cst_conststring:
|
|
begin
|
|
current_asmdata.getglobaldatalabel(lastlabel.lab);
|
|
|
|
{ include terminating zero }
|
|
getmem(pc,len+1);
|
|
move(value_str^,pc[0],len);
|
|
pc[len]:=#0;
|
|
{ the data includes the terminating #0 because this
|
|
string can be used for pchar assignments (but it's
|
|
also used for array-of-char assignments, in which
|
|
case the terminating #0 is not part of the data) }
|
|
datadef:=carraydef.getreusable(cansichartype,len+1);
|
|
datatcb.maybe_begin_aggregate(datadef);
|
|
datatcb.emit_tai(Tai_string.Create_pchar(pc,len+1),datadef);
|
|
datatcb.maybe_end_aggregate(datadef);
|
|
current_asmdata.asmlists[al_typedconsts].concatList(
|
|
datatcb.get_final_asmlist(lastlabel.lab,datadef,sec_rodata_norel,lastlabel.lab.name,const_align(sizeof(pint)))
|
|
);
|
|
end;
|
|
else
|
|
internalerror(2013120103);
|
|
end;
|
|
datatcb.free;
|
|
lab_str:=lastlabel.lab;
|
|
entry^.Data:=lastlabel.lab;
|
|
end;
|
|
end;
|
|
if cst_type in [cst_ansistring, cst_widestring, cst_unicodestring] then
|
|
begin
|
|
location_reset(location, LOC_REGISTER, def_cgsize(strpointerdef));
|
|
location.register:=hlcg.getaddressregister(current_asmdata.CurrAsmList,strpointerdef);
|
|
load_dynstring(strpointerdef, elementdef, winlikewidestring);
|
|
end
|
|
else
|
|
begin
|
|
location_reset_ref(location, LOC_CREFERENCE, def_cgsize(resultdef), const_align(strpointerdef.size), []);
|
|
location.reference.symbol:=lab_str;
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tcgstringconstnode.load_dynstring(const strpointerdef: tdef; const elementdef: tdef; const winlikewidestring: boolean);
|
|
var
|
|
href: treference;
|
|
begin
|
|
reference_reset_symbol(href, lab_str,
|
|
ctai_typedconstbuilder.get_string_symofs(tstringdef(resultdef).stringtype, winlikewidestring),
|
|
const_align(strpointerdef.size),[]);
|
|
hlcg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList, elementdef, strpointerdef, href, location.register)
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TCGSETCONSTNODE
|
|
*****************************************************************************}
|
|
|
|
function tcgsetconstnode.emitvarsetconst: tasmsymbol;
|
|
type
|
|
setbytes=array[0..31] of byte;
|
|
Psetbytes=^setbytes;
|
|
var
|
|
lab: tasmlabel;
|
|
i: longint;
|
|
tcb: ttai_typedconstbuilder;
|
|
begin
|
|
current_asmdata.getglobaldatalabel(lab);
|
|
result:=lab;
|
|
lab_set:=lab;
|
|
tcb:=ctai_typedconstbuilder.create([tcalo_is_lab,tcalo_make_dead_strippable,tcalo_apply_constalign]);
|
|
tcb.maybe_begin_aggregate(resultdef);
|
|
if (source_info.endian=target_info.endian) then
|
|
for i:=0 to resultdef.size-1 do
|
|
tcb.emit_tai(tai_const.create_8bit(Psetbytes(value_set)^[i]),u8inttype)
|
|
else
|
|
for i:=0 to resultdef.size-1 do
|
|
tcb.emit_tai(tai_const.create_8bit(reverse_byte(Psetbytes(value_set)^[i])),u8inttype);
|
|
tcb.maybe_end_aggregate(resultdef);
|
|
current_asmdata.asmlists[al_typedconsts].concatlist(tcb.get_final_asmlist(
|
|
result,resultdef,sec_rodata_norel,result.name,const_align(8)));
|
|
tcb.free;
|
|
end;
|
|
|
|
|
|
procedure tcgsetconstnode.handlevarsetconst;
|
|
var
|
|
entry : PHashSetItem;
|
|
begin
|
|
location_reset_ref(location,LOC_CREFERENCE,OS_NO,const_align(8),[]);
|
|
{ const already used ? }
|
|
if not assigned(lab_set) then
|
|
begin
|
|
entry := current_asmdata.ConstPools[sp_varsets].FindOrAdd(value_set, resultdef.size);
|
|
|
|
{ :-(, we must generate a new entry }
|
|
if not assigned(entry^.Data) then
|
|
entry^.Data:=emitvarsetconst;
|
|
lab_set := TAsmSymbol(entry^.Data);
|
|
end;
|
|
location.reference.symbol:=lab_set;
|
|
end;
|
|
|
|
|
|
procedure tcgsetconstnode.pass_generate_code;
|
|
type
|
|
setbytes=array[0..31] of byte;
|
|
Psetbytes=^setbytes;
|
|
|
|
procedure smallsetconst;
|
|
begin
|
|
location_reset(location,LOC_CONSTANT,int_cgsize(resultdef.size));
|
|
if (source_info.endian=target_info.endian) then
|
|
begin
|
|
{ not plongint, because that will "sign extend" the set on 64 bit platforms }
|
|
{ if changed to "paword", please also modify "32-resultdef.size*8" and }
|
|
{ cross-endian code below }
|
|
{ Extra aint type cast to avoid range errors }
|
|
location.value:=aint(pCardinal(value_set)^)
|
|
end
|
|
else
|
|
begin
|
|
location.value:=aint(reverse_longword(Pcardinal(value_set)^));
|
|
end;
|
|
if (target_info.endian=endian_big) then
|
|
location.value:=location.value shr (32-resultdef.size*8);
|
|
end;
|
|
|
|
begin
|
|
adjustforsetbase;
|
|
|
|
{ small sets are loaded as constants }
|
|
if is_smallset(resultdef) then
|
|
smallsetconst
|
|
else
|
|
handlevarsetconst;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TCGNILNODE
|
|
*****************************************************************************}
|
|
|
|
procedure tcgnilnode.pass_generate_code;
|
|
begin
|
|
location_reset(location,LOC_CONSTANT,OS_ADDR);
|
|
location.value:=0;
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
TCGGUIDCONSTNODE
|
|
*****************************************************************************}
|
|
|
|
procedure tcgguidconstnode.pass_generate_code;
|
|
var
|
|
lastlabel : tasmlabel;
|
|
entry : PHashSetItem;
|
|
datatcb : ttai_typedconstbuilder;
|
|
begin
|
|
location_reset_ref(location,LOC_CREFERENCE,OS_NO,const_align(16),[]);
|
|
lastlabel:=nil;
|
|
{ const already used ? }
|
|
if not assigned(lab_set) then
|
|
begin
|
|
entry:=current_asmdata.ConstPools[sp_guids].FindOrAdd(@value,sizeof(value));
|
|
lab_set:=TAsmLabel(entry^.Data); // is it needed anymore?
|
|
|
|
{ :-(, we must generate a new entry }
|
|
if not assigned(entry^.Data) then
|
|
begin
|
|
current_asmdata.getglobaldatalabel(lastlabel);
|
|
datatcb:=ctai_typedconstbuilder.create([tcalo_is_lab,tcalo_make_dead_strippable,tcalo_apply_constalign]);
|
|
datatcb.emit_guid_const(value);
|
|
current_asmdata.asmlists[al_typedconsts].concatList(
|
|
datatcb.get_final_asmlist(lastlabel,rec_tguid,sec_rodata_norel,lastlabel.name,const_align(16)));
|
|
datatcb.free;
|
|
lab_set:=lastlabel;
|
|
entry^.Data:=lastlabel;
|
|
end;
|
|
end;
|
|
location.reference.symbol:=lab_set;
|
|
end;
|
|
|
|
|
|
begin
|
|
crealconstnode:=tcgrealconstnode;
|
|
cordconstnode:=tcgordconstnode;
|
|
cpointerconstnode:=tcgpointerconstnode;
|
|
cstringconstnode:=tcgstringconstnode;
|
|
csetconstnode:=tcgsetconstnode;
|
|
cnilnode:=tcgnilnode;
|
|
cguidconstnode:=tcgguidconstnode;
|
|
end.
|