paweld/fpc
1
0
Fork 0
mirror of https://gitlab.com/freepascal.org/fpc/source.git synced 2025-05-02 08:13:47 +02:00
Code Issues Packages Projects Releases Wiki Activity
992cc352c6
fpc/compiler/jvm/hlcgcpu.pas
Jonas Maebe 992cc352c6 * generalized handling of pointers to non-implicit pointer types: 
as far as Java is concerned, they're now all arrays of JLObject.
    When loading a value from them, we typecast the loaded value
    to the appropriate type. This allows typecasting one pointer
    type to another without getting verification errors (since an
    "array of JLObject" is not compatible with "array of JLString")
  - no longer allow dereferencing untyped pointers on the JVM
    target, since that always results in invalid bytecode

git-svn-id: branches/jvmbackend@18819 -
2011-08-23 17:44:55 +00:00

2231 lines
85 KiB
ObjectPascal
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

{
Copyright (c) 1998-2010 by Florian Klaempfl and Jonas Maebe
Member of the Free Pascal development team
This unit implements the jvm high level code generator
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 hlcgcpu;
{$i fpcdefs.inc}
interface
uses
globtype,
aasmbase,aasmdata,
symbase,symconst,symtype,symdef,symsym,
cpubase, hlcgobj, cgbase, cgutils, parabase;
type
{ thlcgjvm }
thlcgjvm = class(thlcgobj)
private
fevalstackheight,
fmaxevalstackheight: longint;
public
constructor create;
procedure incstack(list : TAsmList;slots: longint);
procedure decstack(list : TAsmList;slots: longint);
function def2regtyp(def: tdef): tregistertype; override;
procedure a_call_name(list : TAsmList;pd : tprocdef;const s : TSymStr; weak: boolean);override;
procedure a_call_name_inherited(list : TAsmList;pd : tprocdef;const s : TSymStr);override;
procedure a_load_const_reg(list : TAsmList;tosize : tdef;a : aint;register : tregister);override;
procedure a_load_const_ref(list : TAsmList;tosize : tdef;a : aint;const ref : treference);override;
procedure a_load_reg_ref(list : TAsmList;fromsize, tosize : tdef;register : tregister;const ref : treference);override;
procedure a_load_reg_reg(list : TAsmList;fromsize, tosize : tdef;reg1,reg2 : tregister);override;
procedure a_load_ref_reg(list : TAsmList;fromsize, tosize : tdef;const ref : treference;register : tregister);override;
procedure a_load_ref_ref(list : TAsmList;fromsize, tosize : tdef;const sref : treference;const dref : treference);override;
procedure a_loadaddr_ref_reg(list : TAsmList;fromsize, tosize : tdef;const ref : treference;r : tregister);override;
procedure a_op_const_reg(list: TAsmList; Op: TOpCG; size: tdef; a: Aint; reg: TRegister); override;
procedure a_op_const_reg_reg(list: TAsmList; op: TOpCg; size: tdef; a: aint; src, dst: tregister); override;
procedure a_op_const_ref(list: TAsmList; Op: TOpCG; size: tdef; a: Aint; const ref: TReference); override;
procedure a_op_ref_reg(list: TAsmList; Op: TOpCG; size: tdef; const ref: TReference; reg: TRegister); override;
procedure a_op_reg_reg_reg(list: TAsmList; op: TOpCg; size: tdef; src1, src2, dst: tregister); override;
procedure a_op_reg_reg(list: TAsmList; Op: TOpCG; size: tdef; reg1, reg2: TRegister); override;
procedure a_cmp_const_ref_label(list: TAsmList; size: tdef; cmp_op: topcmp; a: aint; const ref: treference; l: tasmlabel); override;
procedure a_cmp_const_reg_label(list: TAsmList; size: tdef; cmp_op: topcmp; a: aint; reg: tregister; l: tasmlabel); override;
procedure a_cmp_ref_reg_label(list: TAsmList; size: tdef; cmp_op: topcmp; const ref: treference; reg: tregister; l: tasmlabel); override;
procedure a_cmp_reg_ref_label(list: TAsmList; size: tdef; cmp_op: topcmp; reg: tregister; const ref: treference; l: tasmlabel); override;
procedure a_cmp_reg_reg_label(list: TAsmList; size: tdef; cmp_op: topcmp; reg1, reg2: tregister; l: tasmlabel); override;
procedure a_jmp_always(list : TAsmList;l: tasmlabel); override;
procedure g_concatcopy(list : TAsmList;size: tdef; const source,dest : treference);override;
procedure g_copyshortstring(list : TAsmList;const source,dest : treference;strdef:tstringdef);override;
procedure a_loadfpu_ref_ref(list: TAsmList; fromsize, tosize: tdef; const ref1, ref2: treference); override;
procedure a_loadfpu_ref_reg(list: TAsmList; fromsize, tosize: tdef; const ref: treference; reg: tregister); override;
procedure a_loadfpu_reg_ref(list: TAsmList; fromsize, tosize: tdef; reg: tregister; const ref: treference); override;
procedure a_loadfpu_reg_reg(list: TAsmList; fromsize, tosize: tdef; reg1, reg2: tregister); override;
procedure g_proc_entry(list : TAsmList;localsize : longint;nostackframe:boolean); override;
procedure g_proc_exit(list : TAsmList;parasize:longint;nostackframe:boolean); override;
procedure gen_load_return_value(list:TAsmList);override;
procedure record_generated_code_for_procdef(pd: tprocdef; code, data: TAsmList); override;
procedure g_incrrefcount(list : TAsmList;t: tdef; const ref: treference);override;
procedure g_decrrefcount(list : TAsmList;t: tdef; const ref: treference);override;
procedure g_array_rtti_helper(list: TAsmList; t: tdef; const ref: treference; const highloc: tlocation; const name: string); override;
procedure g_initialize(list : TAsmList;t : tdef;const ref : treference);override;
procedure g_finalize(list : TAsmList;t : tdef;const ref : treference);override;
procedure location_get_data_ref(list:TAsmList;def: tdef; const l:tlocation;var ref:treference;loadref:boolean; alignment: longint);override;
procedure g_copyvaluepara_openarray(list: TAsmList; const ref: treference; const lenloc: tlocation; arrdef: tarraydef; destreg: tregister); override;
procedure g_releasevaluepara_openarray(list: TAsmList; arrdef: tarraydef; const l: tlocation); override;
procedure gen_initialize_code(list: TAsmList); override;
procedure gen_entry_code(list: TAsmList); override;
procedure gen_exit_code(list: TAsmList); override;
{ JVM-specific routines }
procedure a_load_stack_reg(list : TAsmList;size: tdef;reg: tregister);
{ extra_slots are the slots that are used by the reference, and that
will be removed by the store operation }
procedure a_load_stack_ref(list : TAsmList;size: tdef;const ref: treference;extra_slots: longint);
procedure a_load_reg_stack(list : TAsmList;size: tdef;reg: tregister);
{ extra_slots are the slots that are used by the reference, and that
will be removed by the load operation }
procedure a_load_ref_stack(list : TAsmList;size: tdef;const ref: treference;extra_slots: longint);
procedure a_load_const_stack(list : TAsmList;size: tdef;a :aint; typ: TRegisterType);
procedure a_load_stack_loc(list : TAsmList;size: tdef;const loc: tlocation);
procedure a_load_loc_stack(list : TAsmList;size: tdef;const loc: tlocation);
procedure a_loadfpu_const_stack(list : TAsmList;size: tdef;a :double);
procedure a_op_stack(list : TAsmList;op: topcg; size: tdef; trunc32: boolean);
procedure a_op_const_stack(list : TAsmList;op: topcg; size: tdef;a : aint);
procedure a_op_reg_stack(list : TAsmList;op: topcg; size: tdef;reg: tregister);
procedure a_op_ref_stack(list : TAsmList;op: topcg; size: tdef;const ref: treference);
procedure a_op_loc_stack(list : TAsmList;op: topcg; size: tdef;const loc: tlocation);
procedure g_reference_loc(list: TAsmList; def: tdef; const fromloc: tlocation; out toloc: tlocation); override;
{ assumes that initdim dimensions have already been pushed on the
evaluation stack, and creates a new array of type arrdef with these
dimensions }
procedure g_newarray(list : TAsmList; arrdef: tdef; initdim: longint);
{ gets the length of the array whose reference is stored in arrloc,
and puts it on the evaluation stack }
procedure g_getarraylen(list : TAsmList; const arrloc: tlocation);
{ this routine expects that all values are already massaged into the
required form (sign bits xor'ed for gt/lt comparisons for OS_32/OS_64,
see http://stackoverflow.com/questions/4068973/c-performing-signed-comparison-in-unsigned-variables-without-casting ) }
procedure a_cmp_stack_label(list : TAsmlist; size: tdef; cmp_op: topcmp; lab: tasmlabel);
{ these 2 routines perform the massaging expected by the previous one }
procedure maybe_adjust_cmp_stackval(list : TAsmlist; size: tdef; cmp_op: topcmp);
function maybe_adjust_cmp_constval(size: tdef; cmp_op: topcmp; a: aint): aint;
{ truncate/sign extend after performing operations on values < 32 bit
that may have overflowed outside the range }
procedure maybe_adjust_op_result(list: TAsmList; op: TOpCg; size: tdef);
{ performs sign/zero extension as required }
procedure resize_stack_int_val(list: TAsmList;fromsize,tosize: tcgsize; forarraystore: boolean);
property maxevalstackheight: longint read fmaxevalstackheight;
procedure gen_initialize_fields_code(list:TAsmList);
procedure gen_typecheck(list: TAsmList; checkop: tasmop; checkdef: tdef);
protected
function get_enum_init_val_ref(def: tdef; out ref: treference): boolean;
procedure allocate_implicit_structs_for_st_with_base_ref(list: TAsmList; st: tsymtable; const ref: treference; allocvartyp: tsymtyp);
procedure allocate_enum_with_base_ref(list: TAsmList; vs: tabstractvarsym; const initref: treference; destbaseref: treference);
procedure allocate_implicit_struct_with_base_ref(list: TAsmList; vs: tabstractvarsym; ref: treference);
procedure gen_load_uninitialized_function_result(list: TAsmList; pd: tprocdef; resdef: tdef; const resloc: tcgpara); override;
procedure g_copyvalueparas(p: TObject; arg: pointer); override;
procedure inittempvariables(list:TAsmList);override;
{ in case of an array, the array base address and index have to be
put on the evaluation stack before the stored value; similarly, for
fields the self pointer has to be loaded first. Also checks whether
the reference is valid. If dup is true, the necessary values are stored
twice. Returns how many stack slots have been consumed, disregarding
the "dup". }
function prepare_stack_for_ref(list: TAsmList; const ref: treference; dup: boolean): longint;
{ return the load/store opcode to load/store from/to ref; if the result
has to be and'ed after a load to get the final value, that constant
is returned in finishandval (otherwise that value is set to -1) }
function loadstoreopcref(def: tdef; isload: boolean; const ref: treference; out finishandval: aint): tasmop;
{ return the load/store opcode to load/store from/to reg; if the result
has to be and'ed after a load to get the final value, that constant
is returned in finishandval (otherwise that value is set to -1) }
function loadstoreopc(def: tdef; isload, isarray: boolean; out finishandval: aint): tasmop;
procedure resizestackfpuval(list: TAsmList; fromsize, tosize: tcgsize);
{ in case of an OS_32 OP_DIV, we have to use an OS_S64 OP_IDIV because the
JVM does not support unsigned divisions }
procedure maybepreparedivu32(list: TAsmList; var op: topcg; size: tdef; out isdivu32: boolean);
{ common implementation of a_call_* }
procedure a_call_name_intern(list : TAsmList;pd : tprocdef;const s : TSymStr; inheritedcall: boolean);
{ concatcopy helpers }
procedure concatcopy_normal_array(list: TAsmList; size: tdef; const source, dest: treference);
procedure concatcopy_record(list: TAsmList; size: tdef; const source, dest: treference);
procedure concatcopy_set(list: TAsmList; size: tdef; const source, dest: treference);
procedure concatcopy_shortstring(list: TAsmList; size: tdef; const source, dest: treference);
end;
procedure create_hlcodegen;
const
opcmp2if: array[topcmp] of tasmop = (A_None,
a_ifeq,a_ifgt,a_iflt,a_ifge,a_ifle,
a_ifne,a_ifle,a_iflt,a_ifge,a_ifgt);
implementation
uses
verbose,cutils,globals,fmodule,constexp,
defutil,
aasmtai,aasmcpu,
symtable,jvmdef,
procinfo,cgcpu,tgobj;
const
TOpCG2IAsmOp : array[topcg] of TAsmOp=( { not = xor -1 }
A_None,A_None,a_iadd,a_iand,A_none,a_idiv,a_imul,a_imul,a_ineg,A_None,a_ior,a_ishr,a_ishl,a_iushr,a_isub,a_ixor,A_None,A_None
);
TOpCG2LAsmOp : array[topcg] of TAsmOp=( { not = xor -1 }
A_None,A_None,a_ladd,a_land,A_none,a_ldiv,a_lmul,a_lmul,a_lneg,A_None,a_lor,a_lshr,a_lshl,a_lushr,a_lsub,a_lxor,A_None,A_None
);
constructor thlcgjvm.create;
begin
fevalstackheight:=0;
fmaxevalstackheight:=0;
end;
procedure thlcgjvm.incstack(list: TasmList;slots: longint);
begin
if slots=0 then
exit;
inc(fevalstackheight,slots);
if (fevalstackheight>fmaxevalstackheight) then
fmaxevalstackheight:=fevalstackheight;
if cs_asm_regalloc in current_settings.globalswitches then
list.concat(tai_comment.Create(strpnew('allocated '+tostr(slots)+', stack height = '+tostr(fevalstackheight))));
end;
procedure thlcgjvm.decstack(list: TAsmList;slots: longint);
begin
if slots=0 then
exit;
dec(fevalstackheight,slots);
if (fevalstackheight<0) and
not(cs_no_regalloc in current_settings.globalswitches) then
internalerror(2010120501);
if cs_asm_regalloc in current_settings.globalswitches then
list.concat(tai_comment.Create(strpnew(' freed '+tostr(slots)+', stack height = '+tostr(fevalstackheight))));
end;
function thlcgjvm.def2regtyp(def: tdef): tregistertype;
begin
case def.typ of
{ records and enums are implemented via classes }
recorddef,
enumdef,
setdef:
result:=R_ADDRESSREGISTER;
{ shortstrings are implemented via classes }
else if is_shortstring(def) or
{ voiddef can only be typecasted into (implicit) pointers }
is_void(def) then
result:=R_ADDRESSREGISTER
else
result:=inherited;
end;
end;
procedure thlcgjvm.a_call_name(list: TAsmList; pd: tprocdef; const s: TSymStr; weak: boolean);
begin
a_call_name_intern(list,pd,s,false);
end;
procedure thlcgjvm.a_call_name_inherited(list: TAsmList; pd: tprocdef; const s: TSymStr);
begin
a_call_name_intern(list,pd,s,true);
end;
procedure thlcgjvm.a_load_const_stack(list : TAsmList;size : tdef;a : aint; typ: TRegisterType);
const
int2opc: array[-1..5] of tasmop = (a_iconst_m1,a_iconst_0,a_iconst_1,
a_iconst_2,a_iconst_3,a_iconst_4,a_iconst_5);
begin
case typ of
R_INTREGISTER:
begin
case def_cgsize(size) of
OS_8,OS_16,OS_32,
OS_S8,OS_S16,OS_S32:
begin
{ convert cardinals to longints }
a:=longint(a);
if (a>=-1) and
(a<=5) then
list.concat(taicpu.op_none(int2opc[a]))
else if (a>=low(shortint)) and
(a<=high(shortint)) then
list.concat(taicpu.op_const(a_bipush,a))
else if (a>=low(smallint)) and
(a<=high(smallint)) then
list.concat(taicpu.op_const(a_sipush,a))
else
list.concat(taicpu.op_const(a_ldc,a));
end;
OS_64,OS_S64:
begin
case a of
0:
list.concat(taicpu.op_none(a_lconst_0));
1:
list.concat(taicpu.op_none(a_lconst_1));
else
list.concat(taicpu.op_const(a_ldc2_w,a));
end;
incstack(list,1);
end;
else
internalerror(2010110702);
end;
end;
R_ADDRESSREGISTER:
begin
if a<>0 then
internalerror(2010110701);
list.concat(taicpu.op_none(a_aconst_null));
end;
else
internalerror(2010110703);
end;
incstack(list,1);
end;
procedure thlcgjvm.a_load_stack_loc(list: TAsmList; size: tdef; const loc: tlocation);
begin
case loc.loc of
LOC_REGISTER,LOC_CREGISTER,
LOC_FPUREGISTER,LOC_CFPUREGISTER:
a_load_stack_reg(list,size,loc.register);
LOC_REFERENCE:
a_load_stack_ref(list,size,loc.reference,prepare_stack_for_ref(list,loc.reference,false));
else
internalerror(2011020501);
end;
end;
procedure thlcgjvm.a_load_loc_stack(list: TAsmList;size: tdef;const loc: tlocation);
begin
case loc.loc of
LOC_REGISTER,LOC_CREGISTER,
LOC_FPUREGISTER,LOC_CFPUREGISTER:
a_load_reg_stack(list,size,loc.register);
LOC_REFERENCE,LOC_CREFERENCE:
a_load_ref_stack(list,size,loc.reference,prepare_stack_for_ref(list,loc.reference,false));
LOC_CONSTANT:
a_load_const_stack(list,size,loc.value,def2regtyp(size));
else
internalerror(2011010401);
end;
end;
procedure thlcgjvm.a_loadfpu_const_stack(list: TAsmList; size: tdef; a: double);
begin
case tfloatdef(size).floattype of
s32real:
begin
if a=0.0 then
list.concat(taicpu.op_none(a_fconst_0))
else if a=1.0 then
list.concat(taicpu.op_none(a_fconst_1))
else if a=2.0 then
list.concat(taicpu.op_none(a_fconst_2))
else
list.concat(taicpu.op_single(a_ldc,a));
incstack(list,1);
end;
s64real:
begin
if a=0.0 then
list.concat(taicpu.op_none(a_dconst_0))
else if a=1.0 then
list.concat(taicpu.op_none(a_dconst_1))
else
list.concat(taicpu.op_double(a_ldc2_w,a));
incstack(list,2);
end
else
internalerror(2011010501);
end;
end;
procedure thlcgjvm.a_op_stack(list: TAsmList; op: topcg; size: tdef; trunc32: boolean);
var
cgsize: tcgsize;
begin
if not trunc32 then
cgsize:=def_cgsize(size)
else
begin
resize_stack_int_val(list,OS_32,OS_S64,false);
cgsize:=OS_S64;
end;
case cgsize of
OS_8,OS_S8,
OS_16,OS_S16,
OS_32,OS_S32:
begin
{ not = xor 1 for boolean, xor -1 for the rest}
if op=OP_NOT then
begin
if not is_pasbool(size) then
a_load_const_stack(list,s32inttype,high(cardinal),R_INTREGISTER)
else
a_load_const_stack(list,size,1,R_INTREGISTER);
op:=OP_XOR;
end;
if TOpCG2IAsmOp[op]=A_None then
internalerror(2010120532);
list.concat(taicpu.op_none(TOpCG2IAsmOp[op]));
maybe_adjust_op_result(list,op,size);
if op<>OP_NEG then
decstack(list,1);
end;
OS_64,OS_S64:
begin
{ unsigned 64 bit division must be done via a helper }
if op=OP_DIV then
internalerror(2010120530);
{ not = xor -1 }
if op=OP_NOT then
begin
a_load_const_stack(list,s64inttype,-1,R_INTREGISTER);
op:=OP_XOR;
end;
if TOpCG2LAsmOp[op]=A_None then
internalerror(2010120533);
list.concat(taicpu.op_none(TOpCG2LAsmOp[op]));
case op of
OP_NOT,
OP_NEG:
;
{ the second argument here is an int rather than a long }
OP_SHL,OP_SHR,OP_SAR:
decstack(list,1);
else
decstack(list,2);
end;
end;
else
internalerror(2010120531);
end;
if trunc32 then
begin
list.concat(taicpu.op_none(a_l2i));
decstack(list,1);
end;
end;
procedure thlcgjvm.a_op_const_stack(list: TAsmList;op: topcg;size: tdef;a: aint);
var
trunc32: boolean;
begin
{ use "integer to (wide)char" narrowing opcode for "and 65535" }
if (op=OP_AND) and
(def_cgsize(size) in [OS_16,OS_S16,OS_32,OS_S32]) and
(a=65535) then
list.concat(taicpu.op_none(a_i2c))
else
begin
maybepreparedivu32(list,op,size,trunc32);
case op of
OP_NEG,OP_NOT:
internalerror(2011010801);
OP_SHL,OP_SHR,OP_SAR:
{ the second argument here is an int rather than a long }
a_load_const_stack(list,s32inttype,a,R_INTREGISTER);
else
a_load_const_stack(list,size,a,R_INTREGISTER);
end;
a_op_stack(list,op,size,trunc32);
end;
end;
procedure thlcgjvm.a_op_reg_stack(list: TAsmList; op: topcg; size: tdef; reg: tregister);
var
trunc32: boolean;
begin
maybepreparedivu32(list,op,size,trunc32);
case op of
OP_NEG,OP_NOT:
;
OP_SHL,OP_SHR,OP_SAR:
if not is_64bitint(size) then
a_load_reg_stack(list,size,reg)
else
begin
{ the second argument here is an int rather than a long }
if getsubreg(reg)=R_SUBQ then
internalerror(2011010802);
a_load_reg_stack(list,s32inttype,reg)
end
else
a_load_reg_stack(list,size,reg);
end;
a_op_stack(list,op,size,trunc32);
end;
procedure thlcgjvm.a_op_ref_stack(list: TAsmList; op: topcg; size: tdef; const ref: treference);
var
trunc32: boolean;
begin
{ ref must not be the stack top, because that may indicate an error
(it means that we will perform an operation of the stack top onto
itself, so that means the two values have been loaded manually prior
to calling this routine, instead of letting this routine load one of
them; if something like that is needed, call a_op_stack() directly) }
if ref.base=NR_EVAL_STACK_BASE then
internalerror(2010121102);
maybepreparedivu32(list,op,size,trunc32);
case op of
OP_NEG,OP_NOT:
;
OP_SHL,OP_SHR,OP_SAR:
begin
if not is_64bitint(size) then
a_load_ref_stack(list,size,ref,prepare_stack_for_ref(list,ref,false))
else
a_load_ref_stack(list,s32inttype,ref,prepare_stack_for_ref(list,ref,false));
end;
else
a_load_ref_stack(list,size,ref,prepare_stack_for_ref(list,ref,false));
end;
a_op_stack(list,op,size,trunc32);
end;
procedure thlcgjvm.a_op_loc_stack(list: TAsmList; op: topcg; size: tdef; const loc: tlocation);
begin
case loc.loc of
LOC_REGISTER,LOC_CREGISTER:
a_op_reg_stack(list,op,size,loc.register);
LOC_REFERENCE,LOC_CREFERENCE:
a_op_ref_stack(list,op,size,loc.reference);
LOC_CONSTANT:
a_op_const_stack(list,op,size,loc.value);
else
internalerror(2011011415)
end;
end;
procedure thlcgjvm.g_reference_loc(list: TAsmList; def: tdef; const fromloc: tlocation; out toloc: tlocation);
procedure handle_reg_move(regsize: tdef; const fromreg: tregister; out toreg: tregister; regtyp: tregistertype);
begin
case regtyp of
R_INTREGISTER:
toreg:=getintregister(list,regsize);
R_ADDRESSREGISTER:
toreg:=getaddressregister(list,regsize);
R_FPUREGISTER:
toreg:=getfpuregister(list,regsize);
end;
a_load_reg_reg(list,regsize,regsize,fromreg,toreg);
end;
begin
toloc:=fromloc;
case fromloc.loc of
{ volatile location, can't get a permanent reference }
LOC_REGISTER,
LOC_FPUREGISTER:
internalerror(2011031406);
LOC_CONSTANT:
{ finished }
;
LOC_CREGISTER:
handle_reg_move(def,fromloc.reference.index,toloc.reference.index,R_INTREGISTER);
LOC_CFPUREGISTER:
handle_reg_move(def,fromloc.reference.index,toloc.reference.index,R_FPUREGISTER);
{ although LOC_CREFERENCE cannot be an lvalue, we may want to take a
reference to such a location for multiple reading }
LOC_CREFERENCE,
LOC_REFERENCE:
begin
if (fromloc.reference.base<>NR_NO) and
(fromloc.reference.base<>current_procinfo.framepointer) and
(fromloc.reference.base<>NR_STACK_POINTER_REG) then
handle_reg_move(java_jlobject,fromloc.reference.base,toloc.reference.base,R_ADDRESSREGISTER);
case fromloc.reference.arrayreftype of
art_indexreg:
begin
{ all array indices in Java are 32 bit ints }
handle_reg_move(s32inttype,fromloc.reference.index,toloc.reference.index,R_INTREGISTER);
end;
art_indexref:
begin
if (fromloc.reference.indexbase<>NR_NO) and
(fromloc.reference.indexbase<>NR_STACK_POINTER_REG) then
handle_reg_move(s32inttype,fromloc.reference.indexbase,toloc.reference.indexbase,R_ADDRESSREGISTER);
end;
end;
end;
else
internalerror(2011031407);
end;
end;
procedure thlcgjvm.g_newarray(list: TAsmList; arrdef: tdef; initdim: longint);
var
recref,
enuminitref: treference;
elemdef: tdef;
i: longint;
mangledname: string;
opc: tasmop;
parasize: longint;
primitivetype: boolean;
begin
elemdef:=arrdef;
if initdim>1 then
begin
{ multianewarray typedesc ndim }
list.concat(taicpu.op_sym_const(a_multianewarray,
current_asmdata.RefAsmSymbol(jvmarrtype(elemdef,primitivetype)),initdim));
{ has to be a multi-dimensional array type }
if primitivetype then
internalerror(2011012207);
end
else
begin
{ for primitive types:
newarray typedesc
for reference types:
anewarray typedesc
}
{ get the type of the elements of the array we are creating }
elemdef:=tarraydef(arrdef).elementdef;
mangledname:=jvmarrtype(elemdef,primitivetype);
if primitivetype then
opc:=a_newarray
else
opc:=a_anewarray;
list.concat(taicpu.op_sym(opc,current_asmdata.RefAsmSymbol(mangledname)));
end;
{ all dimensions are removed from the stack, an array reference is
added }
decstack(list,initdim-1);
{ in case of an array of records, sets or shortstrings, initialise }
elemdef:=tarraydef(arrdef).elementdef;
for i:=1 to pred(initdim) do
elemdef:=tarraydef(elemdef).elementdef;
if (elemdef.typ in [recorddef,setdef]) or
((elemdef.typ=enumdef) and
get_enum_init_val_ref(elemdef,enuminitref)) or
is_shortstring(elemdef) or
((elemdef.typ=procvardef) and
not tprocvardef(elemdef).is_addressonly) or
is_ansistring(elemdef) or
is_wide_or_unicode_string(elemdef) or
is_dynamic_array(elemdef) then
begin
{ duplicate array instance }
list.concat(taicpu.op_none(a_dup));
incstack(list,1);
a_load_const_stack(list,s32inttype,initdim-1,R_INTREGISTER);
parasize:=2;
case elemdef.typ of
arraydef:
g_call_system_proc(list,'fpc_initialize_array_dynarr');
recorddef,setdef,procvardef:
begin
tg.gethltemp(list,elemdef,elemdef.size,tt_persistent,recref);
a_load_ref_stack(list,elemdef,recref,prepare_stack_for_ref(list,recref,false));
inc(parasize);
case elemdef.typ of
recorddef:
g_call_system_proc(list,'fpc_initialize_array_record');
setdef:
begin
if tsetdef(elemdef).elementdef.typ=enumdef then
g_call_system_proc(list,'fpc_initialize_array_enumset')
else
g_call_system_proc(list,'fpc_initialize_array_bitset')
end;
procvardef:
g_call_system_proc(list,'fpc_initialize_array_procvar');
end;
tg.ungettemp(list,recref);
end;
enumdef:
begin
inc(parasize);
a_load_ref_stack(list,java_jlobject,enuminitref,prepare_stack_for_ref(list,enuminitref,false));
g_call_system_proc(list,'fpc_initialize_array_object');
end;
stringdef:
begin
case tstringdef(elemdef).stringtype of
st_shortstring:
begin
inc(parasize);
a_load_const_stack(list,u8inttype,tstringdef(elemdef).len,R_INTREGISTER);
g_call_system_proc(list,'fpc_initialize_array_shortstring');
end;
st_ansistring:
g_call_system_proc(list,'fpc_initialize_array_ansistring');
st_unicodestring,
st_widestring:
g_call_system_proc(list,'fpc_initialize_array_unicodestring');
else
internalerror(2011081801);
end;
end;
else
internalerror(2011081801);
end;
decstack(list,parasize);
end;
end;
procedure thlcgjvm.g_getarraylen(list: TAsmList; const arrloc: tlocation);
var
nillab,endlab: tasmlabel;
begin
{ inline because we have to use the arraylength opcode, which
cannot be represented directly in Pascal. Even though the JVM
supports allocated arrays with length=0, we still also have to
check for nil pointers because even if FPC always generates
allocated empty arrays under all circumstances, external Java
code could pass in nil pointers.
Note that this means that assigned(arr) can be different from
length(arr)<>0 for dynamic arrays when targeting the JVM.
}
current_asmdata.getjumplabel(nillab);
current_asmdata.getjumplabel(endlab);
{ if assigned(arr) ... }
a_load_loc_stack(list,java_jlobject,arrloc);
list.concat(taicpu.op_none(a_dup));
incstack(list,1);
list.concat(taicpu.op_sym(a_ifnull,nillab));
decstack(list,1);
{ ... then result:=arraylength(arr) ... }
list.concat(taicpu.op_none(a_arraylength));
a_jmp_always(list,endlab);
{ ... else result:=0 }
a_label(list,nillab);
list.concat(taicpu.op_none(a_pop));
decstack(list,1);
list.concat(taicpu.op_none(a_iconst_0));
incstack(list,1);
a_label(list,endlab);
end;
procedure thlcgjvm.a_cmp_stack_label(list: TAsmlist; size: tdef; cmp_op: topcmp; lab: tasmlabel);
const
opcmp2icmp: array[topcmp] of tasmop = (A_None,
a_if_icmpeq,a_if_icmpgt,a_if_icmplt,a_if_icmpge,a_if_icmple,
a_if_icmpne,a_if_icmple,a_if_icmplt,a_if_icmpge,a_if_icmpgt);
var
cgsize: tcgsize;
begin
case def2regtyp(size) of
R_INTREGISTER:
begin
cgsize:=def_cgsize(size);
case cgsize of
OS_S8,OS_8,
OS_16,OS_S16,
OS_S32,OS_32:
begin
list.concat(taicpu.op_sym(opcmp2icmp[cmp_op],lab));
decstack(list,2);
end;
OS_64,OS_S64:
begin
list.concat(taicpu.op_none(a_lcmp));
decstack(list,3);
list.concat(taicpu.op_sym(opcmp2if[cmp_op],lab));
decstack(list,1);
end;
else
internalerror(2010120538);
end;
end;
R_ADDRESSREGISTER:
begin
case cmp_op of
OC_EQ:
list.concat(taicpu.op_sym(a_if_acmpeq,lab));
OC_NE:
list.concat(taicpu.op_sym(a_if_acmpne,lab));
else
internalerror(2010120537);
end;
decstack(list,2);
end;
else
internalerror(2010120538);
end;
end;
procedure thlcgjvm.maybe_adjust_cmp_stackval(list: TAsmlist; size: tdef; cmp_op: topcmp);
begin
{ use cmp_op because eventually that's what indicates the
signed/unsigned character of the operation, not the size... }
if (cmp_op in [OC_EQ,OC_NE,OC_LT,OC_LTE,OC_GT,OC_GTE]) or
(def2regtyp(size)<>R_INTREGISTER) then
exit;
{ http://stackoverflow.com/questions/4068973/c-performing-signed-comparison-in-unsigned-variables-without-casting }
case def_cgsize(size) of
OS_32,OS_S32:
a_op_const_stack(list,OP_XOR,size,cardinal($80000000));
OS_64,OS_S64:
a_op_const_stack(list,OP_XOR,size,aint($8000000000000000));
end;
end;
function thlcgjvm.maybe_adjust_cmp_constval(size: tdef; cmp_op: topcmp; a: aint): aint;
begin
result:=a;
{ use cmp_op because eventually that's what indicates the
signed/unsigned character of the operation, not the size... }
if (cmp_op in [OC_EQ,OC_NE,OC_LT,OC_LTE,OC_GT,OC_GTE]) or
(def2regtyp(size)<>R_INTREGISTER) then
exit;
case def_cgsize(size) of
OS_32,OS_S32:
result:=a xor cardinal($80000000);
OS_64,OS_S64:
result:=a xor aint($8000000000000000);
end;
end;
procedure thlcgjvm.maybe_adjust_op_result(list: TAsmList; op: TOpCg; size: tdef);
const
overflowops = [OP_MUL,OP_SHL,OP_ADD,OP_SUB,OP_NOT,OP_NEG];
begin
if (op in overflowops) and
(def_cgsize(size) in [OS_8,OS_S8,OS_16,OS_S16]) then
resize_stack_int_val(list,OS_S32,def_cgsize(size),false);
end;
procedure thlcgjvm.gen_load_uninitialized_function_result(list: TAsmList; pd: tprocdef; resdef: tdef; const resloc: tcgpara);
begin
{ constructors don't return anything in Java }
if pd.proctypeoption=potype_constructor then
exit;
{ must return a value of the correct type on the evaluation stack }
case def2regtyp(resdef) of
R_INTREGISTER,
R_ADDRESSREGISTER:
a_load_const_cgpara(list,resdef,0,resloc);
R_FPUREGISTER:
case tfloatdef(resdef).floattype of
s32real:
begin
list.concat(taicpu.op_none(a_fconst_0));
incstack(list,1);
end;
s64real:
begin
list.concat(taicpu.op_none(a_dconst_0));
incstack(list,2);
end;
else
internalerror(2011010302);
end
else
internalerror(2011010301);
end;
end;
procedure thlcgjvm.g_copyvalueparas(p: TObject; arg: pointer);
var
list: tasmlist;
begin
{ zero-extend < 32 bit primitive types (FPC can zero-extend when calling,
but that doesn't help when we're called from Java code or indirectly
as a procvar -- exceptions: widechar (Java-specific type) and ordinal
types whose upper bound does not set the sign bit }
if (tsym(p).typ=paravarsym) and
(tparavarsym(p).varspez=vs_value) and
(tparavarsym(p).vardef.typ=orddef) and
not is_pasbool(tparavarsym(p).vardef) and
not is_widechar(tparavarsym(p).vardef) and
(tparavarsym(p).vardef.size<4) and
not is_signed(tparavarsym(p).vardef) and
(torddef(tparavarsym(p).vardef).high>=(1 shl ((tparavarsym(p).vardef.size-1)*8))) then
begin
list:=TAsmList(arg);
a_op_const_loc(list,OP_AND,tparavarsym(p).vardef,(1 shl (tparavarsym(p).vardef.size*8))-1,tparavarsym(p).initialloc);
end;
inherited g_copyvalueparas(p, arg);
end;
procedure thlcgjvm.inittempvariables(list: TAsmList);
begin
{ these are automatically initialised when allocated if necessary }
end;
function thlcgjvm.prepare_stack_for_ref(list: TAsmList; const ref: treference; dup: boolean): longint;
var
href: treference;
begin
result:=0;
{ fake location that indicates the value is already on the stack? }
if (ref.base=NR_EVAL_STACK_BASE) then
exit;
if ref.arrayreftype=art_none then
begin
{ non-array accesses cannot have an index reg }
if ref.index<>NR_NO then
internalerror(2010120509);
if (ref.base<>NR_NO) then
begin
if (ref.base<>NR_STACK_POINTER_REG) then
begin
{ regular field -> load self on the stack }
a_load_reg_stack(list,voidpointertype,ref.base);
if dup then
begin
list.concat(taicpu.op_none(a_dup));
incstack(list,1);
end;
{ field name/type encoded in symbol, no index/offset }
if not assigned(ref.symbol) or
(ref.offset<>0) then
internalerror(2010120524);
result:=1;
end
else
begin
{ local variable -> offset encoded in opcode and nothing to
do here, except for checking that it's a valid reference }
if assigned(ref.symbol) then
internalerror(2010120523);
end;
end
else
begin
{ static field -> nothing to do here, except for validity check }
if not assigned(ref.symbol) or
(ref.offset<>0) then
internalerror(2010120525);
end;
end
else
begin
{ arrays have implicit dereference -> pointer to array must have been
loaded into base reg }
if (ref.base=NR_NO) or
(ref.base=NR_STACK_POINTER_REG) then
internalerror(2010120511);
if assigned(ref.symbol) then
internalerror(2010120512);
{ stack: ... -> ..., arrayref, index }
{ load array base address }
a_load_reg_stack(list,voidpointertype,ref.base);
{ index can either be in a register, or located in a simple memory
location (since we have to load it anyway) }
case ref.arrayreftype of
art_indexreg:
begin
if ref.index=NR_NO then
internalerror(2010120513);
{ all array indices in Java are 32 bit ints }
a_load_reg_stack(list,s32inttype,ref.index);
end;
art_indexref:
begin
reference_reset_base(href,ref.indexbase,ref.indexoffset,4);
href.symbol:=ref.indexsymbol;
a_load_ref_stack(list,s32inttype,href,prepare_stack_for_ref(list,href,false));
end;
art_indexconst:
begin
a_load_const_stack(list,s32inttype,ref.indexoffset,R_INTREGISTER);
end;
else
internalerror(2011012001);
end;
{ adjustment of the index }
if ref.offset<>0 then
a_op_const_stack(list,OP_ADD,s32inttype,ref.offset);
if dup then
begin
list.concat(taicpu.op_none(a_dup2));
incstack(list,2);
end;
result:=2;
end;
end;
procedure thlcgjvm.a_load_const_reg(list: TAsmList; tosize: tdef; a: aint; register: tregister);
begin
a_load_const_stack(list,tosize,a,def2regtyp(tosize));
a_load_stack_reg(list,tosize,register);
end;
procedure thlcgjvm.a_load_const_ref(list: TAsmList; tosize: tdef; a: aint; const ref: treference);
var
extra_slots: longint;
begin
extra_slots:=prepare_stack_for_ref(list,ref,false);
a_load_const_stack(list,tosize,a,def2regtyp(tosize));
a_load_stack_ref(list,tosize,ref,extra_slots);
end;
procedure thlcgjvm.a_load_reg_ref(list: TAsmList; fromsize, tosize: tdef; register: tregister; const ref: treference);
var
extra_slots: longint;
begin
extra_slots:=prepare_stack_for_ref(list,ref,false);
a_load_reg_stack(list,fromsize,register);
a_load_stack_ref(list,tosize,ref,extra_slots);
end;
procedure thlcgjvm.a_load_reg_reg(list: TAsmList; fromsize, tosize: tdef; reg1, reg2: tregister);
begin
a_load_reg_stack(list,fromsize,reg1);
if def2regtyp(fromsize)=R_INTREGISTER then
resize_stack_int_val(list,def_cgsize(fromsize),def_cgsize(tosize),false);
a_load_stack_reg(list,tosize,reg2);
end;
procedure thlcgjvm.a_load_ref_reg(list: TAsmList; fromsize, tosize: tdef; const ref: treference; register: tregister);
var
extra_slots: longint;
begin
extra_slots:=prepare_stack_for_ref(list,ref,false);
a_load_ref_stack(list,fromsize,ref,extra_slots);
if def2regtyp(fromsize)=R_INTREGISTER then
resize_stack_int_val(list,def_cgsize(fromsize),def_cgsize(tosize),false);
a_load_stack_reg(list,tosize,register);
end;
procedure thlcgjvm.a_load_ref_ref(list: TAsmList; fromsize, tosize: tdef; const sref: treference; const dref: treference);
var
extra_sslots,
extra_dslots: longint;
begin
{ make sure the destination reference is on top, since in the end the
order has to be "destref, value" -> first create "destref, sourceref" }
extra_dslots:=prepare_stack_for_ref(list,dref,false);
extra_sslots:=prepare_stack_for_ref(list,sref,false);
a_load_ref_stack(list,fromsize,sref,extra_sslots);
if def2regtyp(fromsize)=R_INTREGISTER then
resize_stack_int_val(list,def_cgsize(fromsize),def_cgsize(tosize),dref.arrayreftype<>art_none);
a_load_stack_ref(list,tosize,dref,extra_dslots);
end;
procedure thlcgjvm.a_loadaddr_ref_reg(list: TAsmList; fromsize, tosize: tdef; const ref: treference; r: tregister);
begin
{ only allowed for types that are not implicit pointers in Pascal (in
that case, ref contains a pointer to the actual data and we simply
return that pointer) }
if not jvmimplicitpointertype(fromsize) then
internalerror(2010120534);
a_load_ref_reg(list,java_jlobject,java_jlobject,ref,r);
end;
procedure thlcgjvm.a_op_const_reg(list: TAsmList; Op: TOpCG; size: tdef; a: Aint; reg: TRegister);
begin
a_op_const_reg_reg(list,op,size,a,reg,reg);
end;
procedure thlcgjvm.a_op_const_reg_reg(list: TAsmList; op: TOpCg; size: tdef; a: aint; src, dst: tregister);
begin
a_load_reg_stack(list,size,src);
a_op_const_stack(list,op,size,a);
a_load_stack_reg(list,size,dst);
end;
procedure thlcgjvm.a_op_const_ref(list: TAsmList; Op: TOpCG; size: tdef; a: Aint; const ref: TReference);
var
extra_slots: longint;
begin
extra_slots:=prepare_stack_for_ref(list,ref,true);
{ TODO, here or in peepholeopt: use iinc when possible }
a_load_ref_stack(list,size,ref,extra_slots);
a_op_const_stack(list,op,size,a);
a_load_stack_ref(list,size,ref,extra_slots);
end;
procedure thlcgjvm.a_op_ref_reg(list: TAsmList; Op: TOpCG; size: tdef; const ref: TReference; reg: TRegister);
begin
a_load_reg_stack(list,size,reg);
a_op_ref_stack(list,op,size,ref);
a_load_stack_reg(list,size,reg);
end;
procedure thlcgjvm.a_op_reg_reg_reg(list: TAsmList; op: TOpCg; size: tdef; src1, src2, dst: tregister);
begin
a_load_reg_stack(list,size,src2);
a_op_reg_stack(list,op,size,src1);
a_load_stack_reg(list,size,dst);
end;
procedure thlcgjvm.a_op_reg_reg(list: TAsmList; Op: TOpCG; size: tdef; reg1, reg2: TRegister);
begin
a_op_reg_reg_reg(list,op,size,reg1,reg2,reg2);
end;
procedure thlcgjvm.a_cmp_const_ref_label(list: TAsmList; size: tdef; cmp_op: topcmp; a: aint; const ref: treference; l: tasmlabel);
begin
if ref.base<>NR_EVAL_STACK_BASE then
a_load_ref_stack(list,size,ref,prepare_stack_for_ref(list,ref,false));
maybe_adjust_cmp_stackval(list,size,cmp_op);
a_load_const_stack(list,size,maybe_adjust_cmp_constval(size,cmp_op,a),def2regtyp(size));
a_cmp_stack_label(list,size,cmp_op,l);
end;
procedure thlcgjvm.a_cmp_const_reg_label(list: TAsmList; size: tdef; cmp_op: topcmp; a: aint; reg: tregister; l: tasmlabel);
begin
a_load_reg_stack(list,size,reg);
maybe_adjust_cmp_stackval(list,size,cmp_op);
a_load_const_stack(list,size,maybe_adjust_cmp_constval(size,cmp_op,a),def2regtyp(size));
a_cmp_stack_label(list,size,cmp_op,l);
end;
procedure thlcgjvm.a_cmp_ref_reg_label(list: TAsmList; size: tdef; cmp_op: topcmp; const ref: treference; reg: tregister; l: tasmlabel);
begin
a_load_reg_stack(list,size,reg);
maybe_adjust_cmp_stackval(list,size,cmp_op);
if ref.base<>NR_EVAL_STACK_BASE then
a_load_ref_stack(list,size,ref,prepare_stack_for_ref(list,ref,false))
else
list.concat(taicpu.op_none(a_swap));
maybe_adjust_cmp_stackval(list,size,cmp_op);
a_cmp_stack_label(list,size,cmp_op,l);
end;
procedure thlcgjvm.a_cmp_reg_ref_label(list: TAsmList; size: tdef; cmp_op: topcmp; reg: tregister; const ref: treference; l: tasmlabel);
begin
if ref.base<>NR_EVAL_STACK_BASE then
a_load_ref_stack(list,size,ref,prepare_stack_for_ref(list,ref,false));
maybe_adjust_cmp_stackval(list,size,cmp_op);
a_load_reg_stack(list,size,reg);
maybe_adjust_cmp_stackval(list,size,cmp_op);
a_cmp_stack_label(list,size,cmp_op,l);
end;
procedure thlcgjvm.a_cmp_reg_reg_label(list: TAsmList; size: tdef; cmp_op: topcmp; reg1, reg2: tregister; l: tasmlabel);
begin
a_load_reg_stack(list,size,reg2);
maybe_adjust_cmp_stackval(list,size,cmp_op);
a_load_reg_stack(list,size,reg1);
maybe_adjust_cmp_stackval(list,size,cmp_op);
a_cmp_stack_label(list,size,cmp_op,l);
end;
procedure thlcgjvm.a_jmp_always(list: TAsmList; l: tasmlabel);
begin
list.concat(taicpu.op_sym(a_goto,current_asmdata.RefAsmSymbol(l.name)));
end;
procedure thlcgjvm.concatcopy_normal_array(list: TAsmList; size: tdef; const source, dest: treference);
var
procname: string;
eledef: tdef;
ndim: longint;
adddefaultlenparas: boolean;
begin
{ load copy helper parameters on the stack }
a_load_ref_stack(list,java_jlobject,source,prepare_stack_for_ref(list,source,false));
a_load_ref_stack(list,java_jlobject,dest,prepare_stack_for_ref(list,dest,false));
{ call copy helper }
eledef:=tarraydef(size).elementdef;
ndim:=1;
adddefaultlenparas:=true;
case eledef.typ of
orddef:
begin
case torddef(eledef).ordtype of
pasbool8,s8bit,u8bit,bool8bit,uchar,
s16bit,u16bit,bool16bit,pasbool16,
uwidechar,
s32bit,u32bit,bool32bit,pasbool32,
s64bit,u64bit,bool64bit,pasbool64,scurrency:
procname:='FPC_COPY_SHALLOW_ARRAY'
else
internalerror(2011020504);
end;
end;
arraydef:
begin
{ call fpc_setlength_dynarr_multidim with deepcopy=true, and extra
parameters }
while (eledef.typ=arraydef) and
not is_dynamic_array(eledef) do
begin
eledef:=tarraydef(eledef).elementdef;
inc(ndim)
end;
if (ndim=1) then
procname:='FPC_COPY_SHALLOW_ARRAY'
else
begin
{ deepcopy=true }
a_load_const_stack(list,pasbool8type,1,R_INTREGISTER);
{ ndim }
a_load_const_stack(list,s32inttype,ndim,R_INTREGISTER);
{ eletype }
a_load_const_stack(list,cwidechartype,ord(jvmarrtype_setlength(eledef)),R_INTREGISTER);
adddefaultlenparas:=false;
procname:='FPC_SETLENGTH_DYNARR_MULTIDIM';
end;
end;
recorddef:
procname:='FPC_COPY_JRECORD_ARRAY';
procvardef:
if tprocvardef(eledef).is_addressonly then
procname:='FPC_COPY_SHALLOW_ARRAY'
else
procname:='FPC_COPY_JPROCVAR_ARRAY';
setdef:
if tsetdef(eledef).elementdef.typ=enumdef then
procname:='FPC_COPY_JENUMSET_ARRAY'
else
procname:='FPC_COPY_JBITSET_ARRAY';
floatdef:
procname:='FPC_COPY_SHALLOW_ARRAY';
stringdef:
if is_shortstring(eledef) then
procname:='FPC_COPY_JSHORTSTRING_ARRAY'
else
procname:='FPC_COPY_SHALLOW_ARRAY';
variantdef:
begin
{$ifndef nounsupported}
procname:='FPC_COPY_SHALLOW_ARRAY';
{$else}
{ todo: make a deep copy via clone... }
internalerror(2011020505);
{$endif}
end;
else
procname:='FPC_COPY_SHALLOW_ARRAY';
end;
if adddefaultlenparas then
begin
{ -1, -1 means "copy entire array" }
a_load_const_stack(list,s32inttype,-1,R_INTREGISTER);
a_load_const_stack(list,s32inttype,-1,R_INTREGISTER);
end;
g_call_system_proc(list,procname);
if ndim=1 then
begin
decstack(list,2);
if adddefaultlenparas then
decstack(list,2);
end
else
begin
decstack(list,4);
{ pop return value, must be the same as dest }
list.concat(taicpu.op_none(a_pop));
decstack(list,1);
end;
end;
procedure thlcgjvm.concatcopy_record(list: TAsmList; size: tdef; const source, dest: treference);
var
srsym: tsym;
pd: tprocdef;
begin
{ self }
a_load_ref_stack(list,size,source,prepare_stack_for_ref(list,source,false));
{ result }
a_load_ref_stack(list,size,dest,prepare_stack_for_ref(list,dest,false));
{ call fpcDeepCopy helper }
srsym:=search_struct_member(tabstractrecorddef(size),'FPCDEEPCOPY');
if not assigned(srsym) or
(srsym.typ<>procsym) then
Message1(cg_f_unknown_compilerproc,size.typename+'.fpcDeepCopy');
pd:=tprocdef(tprocsym(srsym).procdeflist[0]);
a_call_name(list,pd,pd.mangledname,false);
{ both parameters are removed, no function result }
decstack(list,2);
end;
procedure thlcgjvm.concatcopy_set(list: TAsmList; size: tdef; const source, dest: treference);
begin
a_load_ref_stack(list,size,source,prepare_stack_for_ref(list,source,false));
a_load_ref_stack(list,size,dest,prepare_stack_for_ref(list,dest,false));
{ call set copy helper }
if tsetdef(size).elementdef.typ=enumdef then
g_call_system_proc(list,'fpc_enumset_copy')
else
g_call_system_proc(list,'fpc_bitset_copy');
{ both parameters are removed, no function result }
decstack(list,2);
end;
procedure thlcgjvm.concatcopy_shortstring(list: TAsmList; size: tdef; const source, dest: treference);
var
srsym: tsym;
pd: tprocdef;
begin
{ self }
a_load_ref_stack(list,size,source,prepare_stack_for_ref(list,source,false));
{ result }
a_load_ref_stack(list,size,dest,prepare_stack_for_ref(list,dest,false));
{ call fpcDeepCopy helper }
srsym:=search_struct_member(java_shortstring,'FPCDEEPCOPY');
if not assigned(srsym) or
(srsym.typ<>procsym) then
Message1(cg_f_unknown_compilerproc,'ShortstringClass.FpcDeepCopy');
pd:=tprocdef(tprocsym(srsym).procdeflist[0]);
a_call_name(list,pd,pd.mangledname,false);
{ both parameters are removed, no function result }
decstack(list,2);
end;
procedure thlcgjvm.g_concatcopy(list: TAsmList; size: tdef; const source, dest: treference);
var
handled: boolean;
begin
handled:=false;
case size.typ of
arraydef:
begin
if not is_dynamic_array(size) then
begin
concatcopy_normal_array(list,size,source,dest);
handled:=true;
end;
end;
recorddef:
begin
concatcopy_record(list,size,source,dest);
handled:=true;
end;
setdef:
begin
concatcopy_set(list,size,source,dest);
handled:=true;
end;
stringdef:
begin
if is_shortstring(size) then
begin
concatcopy_shortstring(list,size,source,dest);
handled:=true;
end;
end;
procvardef:
begin
if not tprocvardef(size).is_addressonly then
begin
concatcopy_record(list,tprocvardef(size).classdef,source,dest);
handled:=true;
end;
end;
end;
if not handled then
inherited;
end;
procedure thlcgjvm.g_copyshortstring(list: TAsmList; const source, dest: treference; strdef: tstringdef);
begin
concatcopy_shortstring(list,strdef,source,dest);
end;
procedure thlcgjvm.a_loadfpu_ref_ref(list: TAsmList; fromsize, tosize: tdef; const ref1, ref2: treference);
var
dstack_slots: longint;
begin
dstack_slots:=prepare_stack_for_ref(list,ref2,false);
a_load_ref_stack(list,fromsize,ref1,prepare_stack_for_ref(list,ref1,false));
resizestackfpuval(list,def_cgsize(fromsize),def_cgsize(tosize));
a_load_stack_ref(list,tosize,ref2,dstack_slots);
end;
procedure thlcgjvm.a_loadfpu_ref_reg(list: TAsmList; fromsize, tosize: tdef; const ref: treference; reg: tregister);
begin
a_load_ref_stack(list,fromsize,ref,prepare_stack_for_ref(list,ref,false));
resizestackfpuval(list,def_cgsize(fromsize),def_cgsize(tosize));
a_load_stack_reg(list,tosize,reg);
end;
procedure thlcgjvm.a_loadfpu_reg_ref(list: TAsmList; fromsize, tosize: tdef; reg: tregister; const ref: treference);
var
dstack_slots: longint;
begin
dstack_slots:=prepare_stack_for_ref(list,ref,false);
a_load_reg_stack(list,fromsize,reg);
resizestackfpuval(list,def_cgsize(fromsize),def_cgsize(tosize));
a_load_stack_ref(list,tosize,ref,dstack_slots);
end;
procedure thlcgjvm.a_loadfpu_reg_reg(list: TAsmList; fromsize, tosize: tdef; reg1, reg2: tregister);
begin
a_load_reg_stack(list,fromsize,reg1);
resizestackfpuval(list,def_cgsize(fromsize),def_cgsize(tosize));
a_load_stack_reg(list,tosize,reg2);
end;
procedure thlcgjvm.g_proc_entry(list: TAsmList; localsize: longint; nostackframe: boolean);
begin
{ the localsize is based on tg.lasttemp -> already in terms of stack
slots rather than bytes }
list.concat(tai_directive.Create(asd_jlimit,'locals '+tostr(localsize)));
{ we insert the unit initialisation code afterwards in the proginit code,
and it uses one stack slot }
if (current_procinfo.procdef.proctypeoption=potype_proginit) then
fmaxevalstackheight:=max(1,fmaxevalstackheight);
list.concat(tai_directive.Create(asd_jlimit,'stack '+tostr(fmaxevalstackheight)));
end;
procedure thlcgjvm.g_proc_exit(list: TAsmList; parasize: longint; nostackframe: boolean);
var
retdef: tdef;
opc: tasmop;
begin
if current_procinfo.procdef.proctypeoption in [potype_constructor,potype_class_constructor] then
retdef:=voidtype
else
retdef:=current_procinfo.procdef.returndef;
case retdef.typ of
orddef:
case torddef(retdef).ordtype of
uvoid:
opc:=a_return;
s64bit,
u64bit,
scurrency:
opc:=a_lreturn;
else
opc:=a_ireturn;
end;
setdef:
opc:=a_areturn;
floatdef:
case tfloatdef(retdef).floattype of
s32real:
opc:=a_freturn;
s64real:
opc:=a_dreturn;
else
internalerror(2011010213);
end;
else
opc:=a_areturn;
end;
list.concat(taicpu.op_none(opc));
end;
procedure thlcgjvm.gen_load_return_value(list: TAsmList);
begin
{ constructors don't return anything in the jvm }
if current_procinfo.procdef.proctypeoption in [potype_constructor,potype_class_constructor] then
exit;
inherited gen_load_return_value(list);
end;
procedure thlcgjvm.record_generated_code_for_procdef(pd: tprocdef; code, data: TAsmList);
begin
{ add something to the al_procedures list as well, because if all al_*
lists are empty, the assembler writer isn't called }
if not code.empty and
current_asmdata.asmlists[al_procedures].empty then
current_asmdata.asmlists[al_procedures].concat(tai_align.Create(4));
pd.exprasmlist:=TAsmList.create;
pd.exprasmlist.concatlist(code);
if assigned(data) and
not data.empty then
internalerror(2010122801);
end;
procedure thlcgjvm.g_incrrefcount(list: TAsmList; t: tdef; const ref: treference);
begin
// do nothing
end;
procedure thlcgjvm.g_decrrefcount(list: TAsmList; t: tdef; const ref: treference);
begin
// do nothing
end;
procedure thlcgjvm.g_array_rtti_helper(list: TAsmList; t: tdef; const ref: treference; const highloc: tlocation; const name: string);
var
normaldim: longint;
eleref: treference;
begin
{ only in case of initialisation, we have to set all elements to "empty" }
if name<>'FPC_INITIALIZE_ARRAY' then
exit;
{ put array on the stack }
a_load_ref_stack(list,java_jlobject,ref,prepare_stack_for_ref(list,ref,false));
{ in case it's an open array whose elements are regular arrays, put the
dimension of the regular arrays on the stack (otherwise pass 0) }
normaldim:=0;
while (t.typ=arraydef) and
not is_dynamic_array(t) do
begin
inc(normaldim);
t:=tarraydef(t).elementdef;
end;
a_load_const_stack(list,s32inttype,normaldim,R_INTREGISTER);
{ highloc is invalid, the length is part of the array in Java }
if is_wide_or_unicode_string(t) then
g_call_system_proc(list,'fpc_initialize_array_unicodestring')
else if is_ansistring(t) then
g_call_system_proc(list,'fpc_initialize_array_ansistring')
else if is_dynamic_array(t) then
g_call_system_proc(list,'fpc_initialize_array_dynarr')
else if is_record(t) or
(t.typ=setdef) then
begin
tg.gethltemp(list,t,t.size,tt_persistent,eleref);
a_load_ref_stack(list,t,eleref,prepare_stack_for_ref(list,eleref,false));
if is_record(t) then
g_call_system_proc(list,'fpc_initialize_array_record')
else if tsetdef(t).elementdef.typ=enumdef then
g_call_system_proc(list,'fpc_initialize_array_enumset')
else
g_call_system_proc(list,'fpc_initialize_array_bitset');
tg.ungettemp(list,eleref);
end
else if (t.typ=enumdef) then
begin
if get_enum_init_val_ref(t,eleref) then
begin
a_load_ref_stack(list,java_jlobject,eleref,prepare_stack_for_ref(list,eleref,false));
g_call_system_proc(list,'fpc_initialize_array_object');
end;
end
else
internalerror(2011031901);
end;
procedure thlcgjvm.g_initialize(list: TAsmList; t: tdef; const ref: treference);
var
dummyloc: tlocation;
sym: tsym;
pd: tprocdef;
begin
if (t.typ=arraydef) and
not is_dynamic_array(t) then
begin
dummyloc.loc:=LOC_INVALID;
g_array_rtti_helper(list,tarraydef(t).elementdef,ref,dummyloc,'FPC_INITIALIZE_ARRAY')
end
else if is_record(t) then
begin
{ call the fpcInitializeRec method }
sym:=tsym(trecorddef(t).symtable.find('FPCINITIALIZEREC'));
if assigned(sym) and
(sym.typ=procsym) then
begin
if tprocsym(sym).procdeflist.Count<>1 then
internalerror(2011071713);
pd:=tprocdef(tprocsym(sym).procdeflist[0]);
end;
a_load_ref_stack(list,java_jlobject,ref,prepare_stack_for_ref(list,ref,false));
a_call_name(list,pd,pd.mangledname,false);
{ parameter removed, no result }
decstack(list,1);
end
else
a_load_const_ref(list,t,0,ref);
end;
procedure thlcgjvm.g_finalize(list: TAsmList; t: tdef; const ref: treference);
begin
// do nothing
end;
procedure thlcgjvm.location_get_data_ref(list: TAsmList; def: tdef; const l: tlocation; var ref: treference; loadref: boolean; alignment: longint);
var
tmploc: tlocation;
begin
{ This routine is a combination of a generalised a_loadaddr_ref_reg()
that also works for addresses in registers (in case loadref is false)
and of a_load_ref_reg (in case loadref is true). It is used for
a) getting the address of managed var/out parameters
b) getting to the actual data of value types that are passed by
reference by the compiler (and then get a local copy at the caller
side). Normally, depending on whether this reference is passed in a
register or reference, we either need a reference with that register
as base or load the address in that reference and use that as a new
base.
Since the JVM cannot take the address of anything, all
"pass-by-reference" value parameters (which are always aggregate types)
are already simply the implicit pointer to the data (since arrays,
records, etc are already internally implicit pointers). This means
that if "loadref" is true, we must simply return this implicit pointer.
If it is false, we are supposed the take the address of this implicit
pointer, which is not possible.
However, managed types are also implicit pointers in Pascal, so in that
case "taking the address" again consists of simply returning the
implicit pointer/current value (in case of a var/out parameter, this
value is stored inside an array).
}
if not loadref then
begin
if not is_managed_type(def) then
internalerror(2011020601);
tmploc:=l;
end
else
begin
if not jvmimplicitpointertype(def) then
begin
{ passed by reference in array of single element; l contains the
base address of the array }
location_reset_ref(tmploc,LOC_REFERENCE,OS_ADDR,4);
reference_reset_base(tmploc.reference,getaddressregister(list,java_jlobject),0,4);
tmploc.reference.arrayreftype:=art_indexconst;
tmploc.reference.indexoffset:=0;
a_load_loc_reg(list,java_jlobject,java_jlobject,l,tmploc.reference.base);
end
else
tmploc:=l;
end;
case tmploc.loc of
LOC_REGISTER,
LOC_CREGISTER :
begin
{ the implicit pointer is in a register and has to be in a
reference -> create a reference and put it there }
location_force_mem(list,tmploc,java_jlobject);
ref:=tmploc.reference;
end;
LOC_REFERENCE,
LOC_CREFERENCE :
begin
ref:=tmploc.reference;
end;
else
internalerror(2011020603);
end;
end;
procedure thlcgjvm.g_copyvaluepara_openarray(list: TAsmList; const ref: treference; const lenloc: tlocation; arrdef: tarraydef; destreg: tregister);
var
localref: treference;
arrloc: tlocation;
stackslots: longint;
begin
{ temporary reference for passing to concatcopy }
tg.gethltemp(list,java_jlobject,java_jlobject.size,tt_persistent,localref);
stackslots:=prepare_stack_for_ref(list,localref,false);
{ create the local copy of the array (lenloc is invalid, get length
directly from the array) }
location_reset_ref(arrloc,LOC_REFERENCE,OS_ADDR,sizeof(pint));
arrloc.reference:=ref;
g_getarraylen(list,arrloc);
g_newarray(list,arrdef,1);
a_load_stack_ref(list,java_jlobject,localref,stackslots);
{ copy the source array to the destination }
g_concatcopy(list,arrdef,ref,localref);
{ and put the array pointer in the register as expected by the caller }
a_load_ref_reg(list,java_jlobject,java_jlobject,localref,destreg);
end;
procedure thlcgjvm.g_releasevaluepara_openarray(list: TAsmList; arrdef: tarraydef; const l: tlocation);
begin
// do nothing, long live garbage collection!
end;
procedure thlcgjvm.gen_initialize_code(list: TAsmList);
var
ref: treference;
begin
{ create globals with wrapped types such as arrays/records }
case current_procinfo.procdef.proctypeoption of
potype_unitinit:
begin
reference_reset_base(ref,NR_NO,0,1);
if assigned(current_module.globalsymtable) then
allocate_implicit_structs_for_st_with_base_ref(list,current_module.globalsymtable,ref,staticvarsym);
allocate_implicit_structs_for_st_with_base_ref(list,current_module.localsymtable,ref,staticvarsym);
end;
potype_class_constructor:
begin
{ also initialise local variables, if any }
inherited;
{ initialise class fields }
reference_reset_base(ref,NR_NO,0,1);
allocate_implicit_structs_for_st_with_base_ref(list,tabstractrecorddef(current_procinfo.procdef.owner.defowner).symtable,ref,staticvarsym);
end
else
inherited
end;
end;
procedure thlcgjvm.gen_entry_code(list: TAsmList);
begin
list.concat(Tai_force_line.Create);
end;
procedure thlcgjvm.gen_exit_code(list: TAsmList);
begin
{ nothing }
end;
procedure thlcgjvm.a_load_stack_reg(list: TAsmList; size: tdef; reg: tregister);
var
opc: tasmop;
finishandval: aint;
begin
opc:=loadstoreopc(size,false,false,finishandval);
list.concat(taicpu.op_reg(opc,reg));
{ avoid problems with getting the size of an open array etc }
if jvmimplicitpointertype(size) then
size:=java_jlobject;
decstack(list,1+ord(size.size>4));
end;
procedure thlcgjvm.a_load_stack_ref(list: TAsmList; size: tdef; const ref: treference; extra_slots: longint);
var
opc: tasmop;
finishandval: aint;
begin
{ fake location that indicates the value has to remain on the stack }
if ref.base=NR_EVAL_STACK_BASE then
exit;
opc:=loadstoreopcref(size,false,ref,finishandval);
if ref.arrayreftype=art_none then
list.concat(taicpu.op_ref(opc,ref))
else
list.concat(taicpu.op_none(opc));
{ avoid problems with getting the size of an open array etc }
if jvmimplicitpointertype(size) then
size:=java_jlobject;
decstack(list,1+ord(size.size>4)+extra_slots);
end;
procedure thlcgjvm.a_load_reg_stack(list: TAsmList; size: tdef; reg: tregister);
var
opc: tasmop;
finishandval: aint;
begin
opc:=loadstoreopc(size,true,false,finishandval);
list.concat(taicpu.op_reg(opc,reg));
{ avoid problems with getting the size of an open array etc }
if jvmimplicitpointertype(size) then
size:=java_jlobject;
incstack(list,1+ord(size.size>4));
if finishandval<>-1 then
a_op_const_stack(list,OP_AND,size,finishandval);
end;
procedure thlcgjvm.a_load_ref_stack(list: TAsmList; size: tdef; const ref: treference; extra_slots: longint);
var
opc: tasmop;
finishandval: aint;
begin
{ fake location that indicates the value is already on the stack? }
if (ref.base=NR_EVAL_STACK_BASE) then
exit;
opc:=loadstoreopcref(size,true,ref,finishandval);
if ref.arrayreftype=art_none then
list.concat(taicpu.op_ref(opc,ref))
else
list.concat(taicpu.op_none(opc));
{ avoid problems with getting the size of an open array etc }
if jvmimplicitpointertype(size) then
size:=java_jlobject;
incstack(list,1+ord(size.size>4)-extra_slots);
if finishandval<>-1 then
a_op_const_stack(list,OP_AND,size,finishandval);
if ref.checkcast then
gen_typecheck(list,a_checkcast,size);
end;
function thlcgjvm.loadstoreopcref(def: tdef; isload: boolean; const ref: treference; out finishandval: aint): tasmop;
const
{ isload static }
getputopc: array[boolean,boolean] of tasmop =
((a_putfield,a_putstatic),
(a_getfield,a_getstatic));
begin
if assigned(ref.symbol) then
begin
{ -> either a global (static) field, or a regular field. If a regular
field, then ref.base contains the self pointer, otherwise
ref.base=NR_NO. In both cases, the symbol contains all other
information (combined field name and type descriptor) }
result:=getputopc[isload,ref.base=NR_NO];
finishandval:=-1;
{ erase sign extension for byte/smallint loads }
if (def2regtyp(def)=R_INTREGISTER) and
not is_signed(def) and
not is_widechar(def) then
case def.size of
1: finishandval:=255;
2: finishandval:=65535;
end;
end
else
result:=loadstoreopc(def,isload,ref.arrayreftype<>art_none,finishandval);
end;
function thlcgjvm.loadstoreopc(def: tdef; isload, isarray: boolean; out finishandval: aint): tasmop;
var
size: longint;
begin
finishandval:=-1;
case def2regtyp(def) of
R_INTREGISTER:
begin
size:=def.size;
if not isarray then
begin
case size of
1,2,3,4:
if isload then
result:=a_iload
else
result:=a_istore;
8:
if isload then
result:=a_lload
else
result:=a_lstore;
else
internalerror(2011032814);
end;
end
{ array }
else if isload then
begin
case size of
1:
begin
result:=a_baload;
if not is_signed(def) then
finishandval:=255;
end;
2:
begin
if is_widechar(def) then
result:=a_caload
else
begin
result:=a_saload;
{ if we'd treat arrays of word as "array of widechar" we
could use a_caload, but that would make for even more
awkward interfacing with external Java code }
if not is_signed(def) then
finishandval:=65535;
end;
end;
4: result:=a_iaload;
8: result:=a_laload;
else
internalerror(2010120503);
end
end
else
begin
case size of
1: result:=a_bastore;
2: if not is_widechar(def) then
result:=a_sastore
else
result:=a_castore;
4: result:=a_iastore;
8: result:=a_lastore;
else
internalerror(2010120508);
end
end
end;
R_ADDRESSREGISTER:
if not isarray then
if isload then
result:=a_aload
else
result:=a_astore
else if isload then
result:=a_aaload
else
result:=a_aastore;
R_FPUREGISTER:
begin
case tfloatdef(def).floattype of
s32real:
if not isarray then
if isload then
result:=a_fload
else
result:=a_fstore
else if isload then
result:=a_faload
else
result:=a_fastore;
s64real:
if not isarray then
if isload then
result:=a_dload
else
result:=a_dstore
else if isload then
result:=a_daload
else
result:=a_dastore;
else
internalerror(2010120504);
end
end
else
internalerror(2010120502);
end;
end;
procedure thlcgjvm.resize_stack_int_val(list: TAsmList; fromsize, tosize: tcgsize; forarraystore: boolean);
begin
if fromsize in [OS_S64,OS_64] then
begin
if not(tosize in [OS_S64,OS_64]) then
begin
{ truncate }
list.concat(taicpu.op_none(a_l2i));
decstack(list,1);
end;
end
else if tosize in [OS_S64,OS_64] then
begin
{ extend }
list.concat(taicpu.op_none(a_i2l));
incstack(list,1);
{ if it was an unsigned 32 bit value, remove sign extension }
if fromsize=OS_32 then
a_op_const_stack(list,OP_AND,s64inttype,cardinal($ffffffff));
end;
{ if the value is immediately stored to an array afterwards, the store
instruction will properly truncate the value; otherwise we may need
additional truncation, except for 64/32 bit conversions, which are
already handled above }
if not forarraystore and
(not(fromsize in [OS_S64,OS_64,OS_32,OS_S32]) or
not(tosize in [OS_S64,OS_64,OS_32,OS_S32])) and
(tcgsize2size[fromsize]>tcgsize2size[tosize]) or
((tcgsize2size[fromsize]=tcgsize2size[tosize]) and
(fromsize<>tosize)) or
{ needs to mask out the sign in the top 16 bits }
((fromsize=OS_S8) and
(tosize=OS_16)) then
case tosize of
OS_8:
a_op_const_stack(list,OP_AND,s32inttype,255);
OS_S8:
list.concat(taicpu.op_none(a_i2b));
OS_16:
list.concat(taicpu.op_none(a_i2c));
OS_S16:
list.concat(taicpu.op_none(a_i2s));
end;
end;
procedure thlcgjvm.allocate_implicit_struct_with_base_ref(list: TAsmList; vs: tabstractvarsym; ref: treference);
var
tmpref: treference;
begin
ref.symbol:=current_asmdata.RefAsmSymbol(vs.mangledname);
tg.gethltemp(list,vs.vardef,vs.vardef.size,tt_persistent,tmpref);
{ only copy the reference, not the actual data }
a_load_ref_ref(list,java_jlobject,java_jlobject,tmpref,ref);
{ remains live since there's still a reference to the created
entity }
tg.ungettemp(list,tmpref);
end;
procedure thlcgjvm.allocate_enum_with_base_ref(list: TAsmList; vs: tabstractvarsym; const initref: treference; destbaseref: treference);
begin
destbaseref.symbol:=current_asmdata.RefAsmSymbol(vs.mangledname);
{ only copy the reference, not the actual data }
a_load_ref_ref(list,java_jlobject,java_jlobject,initref,destbaseref);
end;
function thlcgjvm.get_enum_init_val_ref(def: tdef; out ref: treference): boolean;
var
sym: tstaticvarsym;
begin
result:=false;
sym:=tstaticvarsym(tenumdef(def).getbasedef.classdef.symtable.Find('__FPC_ZERO_INITIALIZER'));
{ no enum with ordinal value 0 -> exit }
if not assigned(sym) then
exit;
reference_reset_symbol(ref,current_asmdata.RefAsmSymbol(sym.mangledname),0,4);
result:=true;
end;
procedure thlcgjvm.allocate_implicit_structs_for_st_with_base_ref(list: TAsmList; st: tsymtable; const ref: treference; allocvartyp: tsymtyp);
var
vs: tabstractvarsym;
def: tdef;
i: longint;
initref: treference;
begin
for i:=0 to st.symlist.count-1 do
begin
if (tsym(st.symlist[i]).typ<>allocvartyp) then
continue;
vs:=tabstractvarsym(st.symlist[i]);
if sp_static in vs.symoptions then
continue;
{ vo_is_external and vo_has_local_copy means a staticvarsym that is
alias for a constsym, whose sole purpose is for allocating and
intialising the constant }
if [vo_is_external,vo_has_local_copy]*vs.varoptions=[vo_is_external] then
continue;
if jvmimplicitpointertype(vs.vardef) then
allocate_implicit_struct_with_base_ref(list,vs,ref)
{ enums are class instances in Java, while they are ordinals in
Pascal. When they are initialized with enum(0), such as in
constructors or global variables, initialize them with the
enum instance for 0 if it exists (if not, it remains nil since
there is no valid enum value in it) }
else if (vs.vardef.typ=enumdef) and
get_enum_init_val_ref(vs.vardef,initref) then
allocate_enum_with_base_ref(list,vs,initref,ref);
end;
{ process symtables of routines part of this symtable (for local typed
constants) }
if allocvartyp=staticvarsym then
begin
for i:=0 to st.deflist.count-1 do
begin
def:=tdef(st.deflist[i]);
{ the unit symtable also contains the methods of classes defined
in that unit -> skip them when processing the unit itself.
Localst is not assigned for the main program code.
Localst can be the same as st in case of unit init code. }
if (def.typ<>procdef) or
(def.owner<>st) or
not assigned(tprocdef(def).localst) or
(tprocdef(def).localst=st) then
continue;
allocate_implicit_structs_for_st_with_base_ref(list,tprocdef(def).localst,ref,allocvartyp);
end;
end;
end;
procedure thlcgjvm.gen_initialize_fields_code(list: TAsmList);
var
sym: tsym;
selfpara: tparavarsym;
selfreg: tregister;
ref: treference;
obj: tabstractrecorddef;
i: longint;
needinit: boolean;
begin
obj:=tabstractrecorddef(current_procinfo.procdef.owner.defowner);
{ check whether there are any fields that need initialisation }
needinit:=false;
for i:=0 to obj.symtable.symlist.count-1 do
begin
sym:=tsym(obj.symtable.symlist[i]);
if (sym.typ=fieldvarsym) and
(jvmimplicitpointertype(tfieldvarsym(sym).vardef) or
((tfieldvarsym(sym).vardef.typ=enumdef) and
get_enum_init_val_ref(tfieldvarsym(sym).vardef,ref))) then
begin
needinit:=true;
break;
end;
end;
if not needinit then
exit;
selfpara:=tparavarsym(current_procinfo.procdef.parast.find('self'));
if not assigned(selfpara) then
internalerror(2011033001);
selfreg:=getaddressregister(list,selfpara.vardef);
a_load_loc_reg(list,obj,obj,selfpara.localloc,selfreg);
reference_reset_base(ref,selfreg,0,1);
allocate_implicit_structs_for_st_with_base_ref(list,obj.symtable,ref,fieldvarsym);
end;
procedure thlcgjvm.gen_typecheck(list: TAsmList; checkop: tasmop; checkdef: tdef);
begin
{ replace special types with their equivalent class type }
if (checkdef.typ=pointerdef) and
jvmimplicitpointertype(tpointerdef(checkdef).pointeddef) then
checkdef:=tpointerdef(checkdef).pointeddef;
if (checkdef=voidpointertype) or
(checkdef.typ=formaldef) then
checkdef:=java_jlobject
else if checkdef.typ=enumdef then
checkdef:=tenumdef(checkdef).classdef
else if checkdef.typ=setdef then
begin
if tsetdef(checkdef).elementdef.typ=enumdef then
checkdef:=java_juenumset
else
checkdef:=java_jubitset;
end
else if checkdef.typ=procvardef then
checkdef:=tprocvardef(checkdef).classdef
else if is_wide_or_unicode_string(checkdef) then
checkdef:=java_jlstring
else if is_ansistring(checkdef) then
checkdef:=java_ansistring
else if is_shortstring(checkdef) then
checkdef:=java_shortstring;
if checkdef.typ in [objectdef,recorddef] then
list.concat(taicpu.op_sym(checkop,current_asmdata.RefAsmSymbol(tabstractrecorddef(checkdef).jvm_full_typename(true))))
else if checkdef.typ=classrefdef then
list.concat(taicpu.op_sym(checkop,current_asmdata.RefAsmSymbol('java/lang/Class')))
else
list.concat(taicpu.op_sym(checkop,current_asmdata.RefAsmSymbol(jvmencodetype(checkdef,false))));
end;
procedure thlcgjvm.resizestackfpuval(list: TAsmList; fromsize, tosize: tcgsize);
begin
if (fromsize=OS_F32) and
(tosize=OS_F64) then
begin
list.concat(taicpu.op_none(a_f2d));
incstack(list,1);
end
else if (fromsize=OS_F64) and
(tosize=OS_F32) then
begin
list.concat(taicpu.op_none(a_d2f));
decstack(list,1);
end;
end;
procedure thlcgjvm.maybepreparedivu32(list: TAsmList; var op: topcg; size: tdef; out isdivu32: boolean);
begin
if (op=OP_DIV) and
(def_cgsize(size)=OS_32) then
begin
{ needs zero-extension to 64 bit, because the JVM only supports
signed divisions }
resize_stack_int_val(list,OS_32,OS_S64,false);
op:=OP_IDIV;
isdivu32:=true;
end
else
isdivu32:=false;
end;
procedure thlcgjvm.a_call_name_intern(list: TAsmList; pd: tprocdef; const s: TSymStr; inheritedcall: boolean);
var
opc: tasmop;
begin
{
invoke types:
* invokeinterface: call method from an interface (must also specify
number of parameters in terms of stack slot count!)
* invokespecial: invoke a constructor, method in a superclass,
or private instance method
* invokestatic: invoke a class method (private or not)
* invokevirtual: invoke a regular method
}
case pd.owner.symtabletype of
globalsymtable,
staticsymtable,
localsymtable:
{ regular and nested procedures are turned into static methods }
opc:=a_invokestatic;
objectsymtable:
begin
case tobjectdef(pd.owner.defowner).objecttype of
odt_javaclass:
begin
if (po_classmethod in pd.procoptions) then
opc:=a_invokestatic
else if (pd.visibility=vis_strictprivate) or
(pd.proctypeoption=potype_constructor) or
inheritedcall then
opc:=a_invokespecial
else
opc:=a_invokevirtual;
end;
odt_interfacejava:
{ static interface methods are not allowed }
opc:=a_invokeinterface;
else
internalerror(2010122601);
end;
end;
recordsymtable:
begin
if (po_staticmethod in pd.procoptions) then
opc:=a_invokestatic
else if (pd.visibility=vis_strictprivate) or
(pd.proctypeoption=potype_constructor) or
inheritedcall then
opc:=a_invokespecial
else
opc:=a_invokevirtual;
end
else
internalerror(2010122602);
end;
if (opc<>a_invokeinterface) then
list.concat(taicpu.op_sym(opc,current_asmdata.RefAsmSymbol(s)))
else
begin
pd.init_paraloc_info(calleeside);
list.concat(taicpu.op_sym_const(opc,current_asmdata.RefAsmSymbol(s),pd.calleeargareasize));
end;
end;
procedure create_hlcodegen;
begin
hlcg:=thlcgjvm.create;
create_codegen;
end;
end.
Reference in New Issue View Git Blame Copy Permalink