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87925db8fb
fpc/compiler/jvm/hlcgcpu.pas
Jonas Maebe 87925db8fb * fixed 64 bit shl/shr/sar operations: the second argument of the 
operation is 32 bit, not 64 bit (both in the compiler and in the
    JVM)
  * request a 64 rather than a 32 bit shift operation from tjvmshlshrnode
    if the result is 64 bit (rather than in case shift value is 64 bit,
    since as described above that never happens)

git-svn-id: branches/jvmbackend@18337 -
2011-08-20 07:48:23 +00:00

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{
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,
symtype,symdef,
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);
procedure a_call_name(list : TAsmList;pd : tprocdef;const s : string; weak: boolean);override;
procedure a_call_name_inherited(list : TAsmList;pd : tprocdef;const s : string);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 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;
{ 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_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);
{ 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;
protected
procedure gen_load_uninitialized_function_result(list: TAsmList; pd: tprocdef; resdef: tdef; const resloc: tcgpara); 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 : string; inheritedcall: boolean);
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,
defutil,
aasmtai,aasmcpu,
symconst,
procinfo,cgcpu;
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) 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;
procedure thlcgjvm.a_call_name(list: TAsmList; pd: tprocdef; const s: string; weak: boolean);
begin
a_call_name_intern(list,pd,s,false);
end;
procedure thlcgjvm.a_call_name_inherited(list: TAsmList; pd: tprocdef; const s: string);
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_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:
;
{ 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);
if not(op in [OP_NEG,OP_NOT]) then
a_load_ref_stack(list,size,ref,prepare_stack_for_ref(list,ref,false));
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.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
if (cmp_op in [OC_EQ,OC_NE]) 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:
a_op_const_stack(list,OP_XOR,size,cardinal($80000000));
OS_64:
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;
if (cmp_op in [OC_EQ,OC_NE]) or
(def2regtyp(size)<>R_INTREGISTER) then
exit;
case def_cgsize(size) of
OS_32:
result:=a xor cardinal($80000000);
OS_64:
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:
list.concat(taicpu.op_none(a_fconst_0));
s64real:
list.concat(taicpu.op_none(a_dconst_0));
else
internalerror(2011010302);
end
else
internalerror(2011010301);
end;
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) }
if ref.arrayreftype=art_indexreg then
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
else
begin
reference_reset_base(href,ref.indexbase,ref.indexoffset,4);
href.symbol:=href.indexsymbol;
a_load_ref_stack(list,s32inttype,href,prepare_stack_for_ref(list,href,false));
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);
decstack(list,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);
decstack(list,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
internalerror(2010120534);
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
a_load_const_stack(list,size,maybe_adjust_cmp_constval(size,cmp_op,a),R_INTREGISTER);
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_const_reg_label(list: TAsmList; size: tdef; cmp_op: topcmp; a: aint; reg: tregister; l: tasmlabel);
begin
a_load_const_stack(list,size,maybe_adjust_cmp_constval(size,cmp_op,a),R_INTREGISTER);
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_ref_reg_label(list: TAsmList; size: tdef; cmp_op: topcmp; const ref: treference; reg: tregister; 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_ref_label(list: TAsmList; size: tdef; cmp_op: topcmp; reg: tregister; const ref: treference; 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_reg_label(list: TAsmList; size: tdef; cmp_op: topcmp; reg1, reg2: tregister; l: tasmlabel);
begin
a_load_reg_stack(list,size,reg1);
maybe_adjust_cmp_stackval(list,size,cmp_op);
a_load_reg_stack(list,size,reg2);
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.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)));
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=potype_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;
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=potype_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.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));
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));
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));
if finishandval<>-1 then
a_op_const_stack(list,OP_AND,size,finishandval);
incstack(list,1+ord(size.size>4));
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));
if finishandval<>-1 then
a_op_const_stack(list,OP_AND,size,finishandval);
incstack(list,1+ord(size.size>4)-extra_slots);
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));
var
size: aint;
begin
if assigned(ref.symbol) then
begin
finishandval:=-1;
{ -> 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];
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;
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.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: string; inheritedcall: boolean);
var
opc: tasmop;
begin
{
invoke types:
* invokeinterface: call method from an interface
* 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_staticmethod in pd.procoptions) then
opc:=a_invokestatic
else if (pd.visibility=vis_private) 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;
else
internalerror(2010122602);
end;
list.concat(taicpu.op_sym(opc,current_asmdata.RefAsmSymbol(s)));
end;
procedure create_hlcodegen;
begin
hlcg:=thlcgjvm.create;
create_codegen;
end;
end.
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