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src/share/vm/c1/c1_CodeStubs.hpp@a738a625039a (annotated)

src/share/vm/c1/c1_CodeStubs.hpp

Fri, 12 Dec 2008 19:54:46 -0800

author

never

date

Fri, 12 Dec 2008 19:54:46 -0800

changeset 921

a738a625039a

parent 777

37f87013dfd8

child 1730

3cf667df43ef

permissions

-rw-r--r--

6757316: load_constant() produces a wrong long constant, with high a low words swapped
Reviewed-by: rasbold, jrose, kvn

duke@435	1	/*
duke@435	2	* Copyright 1999-2006 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	class CodeEmitInfo;
duke@435	26	class LIR_Assembler;
duke@435	27	class LIR_OpVisitState;
duke@435	28
duke@435	29	// CodeStubs are little 'out-of-line' pieces of code that
duke@435	30	// usually handle slow cases of operations. All code stubs
duke@435	31	// are collected and code is emitted at the end of the
duke@435	32	// nmethod.
duke@435	33
duke@435	34	class CodeStub: public CompilationResourceObj {
duke@435	35	protected:
duke@435	36	Label _entry; // label at the stub entry point
duke@435	37	Label _continuation; // label where stub continues, if any
duke@435	38
duke@435	39	public:
duke@435	40	CodeStub() {}
duke@435	41
duke@435	42	// code generation
duke@435	43	void assert_no_unbound_labels() { assert(!_entry.is_unbound() && !_continuation.is_unbound(), "unbound label"); }
duke@435	44	virtual void emit_code(LIR_Assembler* e) = 0;
duke@435	45	virtual CodeEmitInfo* info() const { return NULL; }
duke@435	46	virtual bool is_exception_throw_stub() const { return false; }
duke@435	47	virtual bool is_range_check_stub() const { return false; }
duke@435	48	virtual bool is_divbyzero_stub() const { return false; }
duke@435	49	#ifndef PRODUCT
duke@435	50	virtual void print_name(outputStream* out) const = 0;
duke@435	51	#endif
duke@435	52
duke@435	53	// label access
duke@435	54	Label* entry() { return &_entry; }
duke@435	55	Label* continuation() { return &_continuation; }
duke@435	56	// for LIR
duke@435	57	virtual void visit(LIR_OpVisitState* visit) {
duke@435	58	#ifndef PRODUCT
duke@435	59	if (LIRTracePeephole && Verbose) {
duke@435	60	tty->print("no visitor for ");
duke@435	61	print_name(tty);
duke@435	62	tty->cr();
duke@435	63	}
duke@435	64	#endif
duke@435	65	}
duke@435	66	};
duke@435	67
duke@435	68
duke@435	69	define_array(CodeStubArray, CodeStub*)
duke@435	70	define_stack(_CodeStubList, CodeStubArray)
duke@435	71
duke@435	72	class CodeStubList: public _CodeStubList {
duke@435	73	public:
duke@435	74	CodeStubList(): _CodeStubList() {}
duke@435	75
duke@435	76	void append(CodeStub* stub) {
duke@435	77	if (!contains(stub)) {
duke@435	78	_CodeStubList::append(stub);
duke@435	79	}
duke@435	80	}
duke@435	81	};
duke@435	82
duke@435	83	#ifdef TIERED
duke@435	84	class CounterOverflowStub: public CodeStub {
duke@435	85	private:
duke@435	86	CodeEmitInfo* _info;
duke@435	87	int _bci;
duke@435	88
duke@435	89	public:
duke@435	90	CounterOverflowStub(CodeEmitInfo* info, int bci) : _info(info), _bci(bci) {
duke@435	91	}
duke@435	92
duke@435	93	virtual void emit_code(LIR_Assembler* e);
duke@435	94
duke@435	95	virtual void visit(LIR_OpVisitState* visitor) {
duke@435	96	visitor->do_slow_case(_info);
duke@435	97	}
duke@435	98
duke@435	99	#ifndef PRODUCT
duke@435	100	virtual void print_name(outputStream* out) const { out->print("CounterOverflowStub"); }
duke@435	101	#endif // PRODUCT
duke@435	102
duke@435	103	};
duke@435	104	#endif // TIERED
duke@435	105
duke@435	106	class ConversionStub: public CodeStub {
duke@435	107	private:
duke@435	108	Bytecodes::Code _bytecode;
duke@435	109	LIR_Opr _input;
duke@435	110	LIR_Opr _result;
duke@435	111
duke@435	112	static float float_zero;
duke@435	113	static double double_zero;
duke@435	114	public:
duke@435	115	ConversionStub(Bytecodes::Code bytecode, LIR_Opr input, LIR_Opr result)
duke@435	116	: _bytecode(bytecode), _input(input), _result(result) {
duke@435	117	}
duke@435	118
duke@435	119	Bytecodes::Code bytecode() { return _bytecode; }
duke@435	120	LIR_Opr input() { return _input; }
duke@435	121	LIR_Opr result() { return _result; }
duke@435	122
duke@435	123	virtual void emit_code(LIR_Assembler* e);
duke@435	124	virtual void visit(LIR_OpVisitState* visitor) {
duke@435	125	visitor->do_slow_case();
duke@435	126	visitor->do_input(_input);
duke@435	127	visitor->do_output(_result);
duke@435	128	}
duke@435	129	#ifndef PRODUCT
duke@435	130	virtual void print_name(outputStream* out) const { out->print("ConversionStub"); }
duke@435	131	#endif // PRODUCT
duke@435	132	};
duke@435	133
duke@435	134
duke@435	135	// Throws ArrayIndexOutOfBoundsException by default but can be
duke@435	136	// configured to throw IndexOutOfBoundsException in constructor
duke@435	137	class RangeCheckStub: public CodeStub {
duke@435	138	private:
duke@435	139	CodeEmitInfo* _info;
duke@435	140	LIR_Opr _index;
duke@435	141	bool _throw_index_out_of_bounds_exception;
duke@435	142
duke@435	143	public:
duke@435	144	RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, bool throw_index_out_of_bounds_exception = false);
duke@435	145	virtual void emit_code(LIR_Assembler* e);
duke@435	146	virtual CodeEmitInfo* info() const { return _info; }
duke@435	147	virtual bool is_exception_throw_stub() const { return true; }
duke@435	148	virtual bool is_range_check_stub() const { return true; }
duke@435	149	virtual void visit(LIR_OpVisitState* visitor) {
duke@435	150	visitor->do_slow_case(_info);
duke@435	151	visitor->do_input(_index);
duke@435	152	}
duke@435	153	#ifndef PRODUCT
duke@435	154	virtual void print_name(outputStream* out) const { out->print("RangeCheckStub"); }
duke@435	155	#endif // PRODUCT
duke@435	156	};
duke@435	157
duke@435	158
duke@435	159	class DivByZeroStub: public CodeStub {
duke@435	160	private:
duke@435	161	CodeEmitInfo* _info;
duke@435	162	int _offset;
duke@435	163
duke@435	164	public:
duke@435	165	DivByZeroStub(CodeEmitInfo* info)
duke@435	166	: _info(info), _offset(-1) {
duke@435	167	}
duke@435	168	DivByZeroStub(int offset, CodeEmitInfo* info)
duke@435	169	: _info(info), _offset(offset) {
duke@435	170	}
duke@435	171	virtual void emit_code(LIR_Assembler* e);
duke@435	172	virtual CodeEmitInfo* info() const { return _info; }
duke@435	173	virtual bool is_exception_throw_stub() const { return true; }
duke@435	174	virtual bool is_divbyzero_stub() const { return true; }
duke@435	175	virtual void visit(LIR_OpVisitState* visitor) {
duke@435	176	visitor->do_slow_case(_info);
duke@435	177	}
duke@435	178	#ifndef PRODUCT
duke@435	179	virtual void print_name(outputStream* out) const { out->print("DivByZeroStub"); }
duke@435	180	#endif // PRODUCT
duke@435	181	};
duke@435	182
duke@435	183
duke@435	184	class ImplicitNullCheckStub: public CodeStub {
duke@435	185	private:
duke@435	186	CodeEmitInfo* _info;
duke@435	187	int _offset;
duke@435	188
duke@435	189	public:
duke@435	190	ImplicitNullCheckStub(int offset, CodeEmitInfo* info)
duke@435	191	: _offset(offset), _info(info) {
duke@435	192	}
duke@435	193	virtual void emit_code(LIR_Assembler* e);
duke@435	194	virtual CodeEmitInfo* info() const { return _info; }
duke@435	195	virtual bool is_exception_throw_stub() const { return true; }
duke@435	196	virtual void visit(LIR_OpVisitState* visitor) {
duke@435	197	visitor->do_slow_case(_info);
duke@435	198	}
duke@435	199	#ifndef PRODUCT
duke@435	200	virtual void print_name(outputStream* out) const { out->print("ImplicitNullCheckStub"); }
duke@435	201	#endif // PRODUCT
duke@435	202	};
duke@435	203
duke@435	204
duke@435	205	class NewInstanceStub: public CodeStub {
duke@435	206	private:
duke@435	207	ciInstanceKlass* _klass;
duke@435	208	LIR_Opr _klass_reg;
duke@435	209	LIR_Opr _result;
duke@435	210	CodeEmitInfo* _info;
duke@435	211	Runtime1::StubID _stub_id;
duke@435	212
duke@435	213	public:
duke@435	214	NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id);
duke@435	215	virtual void emit_code(LIR_Assembler* e);
duke@435	216	virtual CodeEmitInfo* info() const { return _info; }
duke@435	217	virtual void visit(LIR_OpVisitState* visitor) {
duke@435	218	visitor->do_slow_case(_info);
duke@435	219	visitor->do_input(_klass_reg);
duke@435	220	visitor->do_output(_result);
duke@435	221	}
duke@435	222	#ifndef PRODUCT
duke@435	223	virtual void print_name(outputStream* out) const { out->print("NewInstanceStub"); }
duke@435	224	#endif // PRODUCT
duke@435	225	};
duke@435	226
duke@435	227
duke@435	228	class NewTypeArrayStub: public CodeStub {
duke@435	229	private:
duke@435	230	LIR_Opr _klass_reg;
duke@435	231	LIR_Opr _length;
duke@435	232	LIR_Opr _result;
duke@435	233	CodeEmitInfo* _info;
duke@435	234
duke@435	235	public:
duke@435	236	NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info);
duke@435	237	virtual void emit_code(LIR_Assembler* e);
duke@435	238	virtual CodeEmitInfo* info() const { return _info; }
duke@435	239	virtual void visit(LIR_OpVisitState* visitor) {
duke@435	240	visitor->do_slow_case(_info);
duke@435	241	visitor->do_input(_klass_reg);
duke@435	242	visitor->do_input(_length);
duke@435	243	assert(_result->is_valid(), "must be valid"); visitor->do_output(_result);
duke@435	244	}
duke@435	245	#ifndef PRODUCT
duke@435	246	virtual void print_name(outputStream* out) const { out->print("NewTypeArrayStub"); }
duke@435	247	#endif // PRODUCT
duke@435	248	};
duke@435	249
duke@435	250
duke@435	251	class NewObjectArrayStub: public CodeStub {
duke@435	252	private:
duke@435	253	LIR_Opr _klass_reg;
duke@435	254	LIR_Opr _length;
duke@435	255	LIR_Opr _result;
duke@435	256	CodeEmitInfo* _info;
duke@435	257
duke@435	258	public:
duke@435	259	NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info);
duke@435	260	virtual void emit_code(LIR_Assembler* e);
duke@435	261	virtual CodeEmitInfo* info() const { return _info; }
duke@435	262	virtual void visit(LIR_OpVisitState* visitor) {
duke@435	263	visitor->do_slow_case(_info);
duke@435	264	visitor->do_input(_klass_reg);
duke@435	265	visitor->do_input(_length);
duke@435	266	assert(_result->is_valid(), "must be valid"); visitor->do_output(_result);
duke@435	267	}
duke@435	268	#ifndef PRODUCT
duke@435	269	virtual void print_name(outputStream* out) const { out->print("NewObjectArrayStub"); }
duke@435	270	#endif // PRODUCT
duke@435	271	};
duke@435	272
duke@435	273
duke@435	274	class MonitorAccessStub: public CodeStub {
duke@435	275	protected:
duke@435	276	LIR_Opr _obj_reg;
duke@435	277	LIR_Opr _lock_reg;
duke@435	278
duke@435	279	public:
duke@435	280	MonitorAccessStub(LIR_Opr obj_reg, LIR_Opr lock_reg) {
duke@435	281	_obj_reg = obj_reg;
duke@435	282	_lock_reg = lock_reg;
duke@435	283	}
duke@435	284
duke@435	285	#ifndef PRODUCT
duke@435	286	virtual void print_name(outputStream* out) const { out->print("MonitorAccessStub"); }
duke@435	287	#endif // PRODUCT
duke@435	288	};
duke@435	289
duke@435	290
duke@435	291	class MonitorEnterStub: public MonitorAccessStub {
duke@435	292	private:
duke@435	293	CodeEmitInfo* _info;
duke@435	294
duke@435	295	public:
duke@435	296	MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info);
duke@435	297
duke@435	298	virtual void emit_code(LIR_Assembler* e);
duke@435	299	virtual CodeEmitInfo* info() const { return _info; }
duke@435	300	virtual void visit(LIR_OpVisitState* visitor) {
duke@435	301	visitor->do_input(_obj_reg);
duke@435	302	visitor->do_input(_lock_reg);
duke@435	303	visitor->do_slow_case(_info);
duke@435	304	}
duke@435	305	#ifndef PRODUCT
duke@435	306	virtual void print_name(outputStream* out) const { out->print("MonitorEnterStub"); }
duke@435	307	#endif // PRODUCT
duke@435	308	};
duke@435	309
duke@435	310
duke@435	311	class MonitorExitStub: public MonitorAccessStub {
duke@435	312	private:
duke@435	313	bool _compute_lock;
duke@435	314	int _monitor_ix;
duke@435	315
duke@435	316	public:
duke@435	317	MonitorExitStub(LIR_Opr lock_reg, bool compute_lock, int monitor_ix)
duke@435	318	: MonitorAccessStub(LIR_OprFact::illegalOpr, lock_reg),
duke@435	319	_compute_lock(compute_lock), _monitor_ix(monitor_ix) { }
duke@435	320	virtual void emit_code(LIR_Assembler* e);
duke@435	321	virtual void visit(LIR_OpVisitState* visitor) {
duke@435	322	assert(_obj_reg->is_illegal(), "unused");
duke@435	323	if (_compute_lock) {
duke@435	324	visitor->do_temp(_lock_reg);
duke@435	325	} else {
duke@435	326	visitor->do_input(_lock_reg);
duke@435	327	}
duke@435	328	}
duke@435	329	#ifndef PRODUCT
duke@435	330	virtual void print_name(outputStream* out) const { out->print("MonitorExitStub"); }
duke@435	331	#endif // PRODUCT
duke@435	332	};
duke@435	333
duke@435	334
duke@435	335	class PatchingStub: public CodeStub {
duke@435	336	public:
duke@435	337	enum PatchID {
duke@435	338	access_field_id,
duke@435	339	load_klass_id
duke@435	340	};
duke@435	341	enum constants {
duke@435	342	patch_info_size = 3
duke@435	343	};
duke@435	344	private:
duke@435	345	PatchID _id;
duke@435	346	address _pc_start;
duke@435	347	int _bytes_to_copy;
duke@435	348	Label _patched_code_entry;
duke@435	349	Label _patch_site_entry;
duke@435	350	Label _patch_site_continuation;
duke@435	351	Register _obj;
duke@435	352	CodeEmitInfo* _info;
duke@435	353	int _oop_index; // index of the patchable oop in nmethod oop table if needed
duke@435	354	static int _patch_info_offset;
duke@435	355
duke@435	356	void align_patch_site(MacroAssembler* masm);
duke@435	357
duke@435	358	public:
duke@435	359	static int patch_info_offset() { return _patch_info_offset; }
duke@435	360
duke@435	361	PatchingStub(MacroAssembler* masm, PatchID id, int oop_index = -1):
duke@435	362	_id(id)
duke@435	363	, _info(NULL)
duke@435	364	, _oop_index(oop_index) {
duke@435	365	if (os::is_MP()) {
duke@435	366	// force alignment of patch sites on MP hardware so we
duke@435	367	// can guarantee atomic writes to the patch site.
duke@435	368	align_patch_site(masm);
duke@435	369	}
duke@435	370	_pc_start = masm->pc();
duke@435	371	masm->bind(_patch_site_entry);
duke@435	372	}
duke@435	373
duke@435	374	void install(MacroAssembler* masm, LIR_PatchCode patch_code, Register obj, CodeEmitInfo* info) {
duke@435	375	_info = info;
duke@435	376	_obj = obj;
duke@435	377	masm->bind(_patch_site_continuation);
duke@435	378	_bytes_to_copy = masm->pc() - pc_start();
duke@435	379	if (_id == PatchingStub::access_field_id) {
duke@435	380	// embed a fixed offset to handle long patches which need to be offset by a word.
duke@435	381	// the patching code will just add the field offset field to this offset so
duke@435	382	// that we can refernce either the high or low word of a double word field.
duke@435	383	int field_offset = 0;
duke@435	384	switch (patch_code) {
duke@435	385	case lir_patch_low: field_offset = lo_word_offset_in_bytes; break;
duke@435	386	case lir_patch_high: field_offset = hi_word_offset_in_bytes; break;
duke@435	387	case lir_patch_normal: field_offset = 0; break;
duke@435	388	default: ShouldNotReachHere();
duke@435	389	}
duke@435	390	NativeMovRegMem* n_move = nativeMovRegMem_at(pc_start());
duke@435	391	n_move->set_offset(field_offset);
duke@435	392	} else if (_id == load_klass_id) {
duke@435	393	assert(_obj != noreg, "must have register object for load_klass");
duke@435	394	#ifdef ASSERT
duke@435	395	// verify that we're pointing at a NativeMovConstReg
duke@435	396	nativeMovConstReg_at(pc_start());
duke@435	397	#endif
duke@435	398	} else {
duke@435	399	ShouldNotReachHere();
duke@435	400	}
duke@435	401	assert(_bytes_to_copy <= (masm->pc() - pc_start()), "not enough bytes");
duke@435	402	}
duke@435	403
duke@435	404	address pc_start() const { return _pc_start; }
duke@435	405	PatchID id() const { return _id; }
duke@435	406
duke@435	407	virtual void emit_code(LIR_Assembler* e);
duke@435	408	virtual CodeEmitInfo* info() const { return _info; }
duke@435	409	virtual void visit(LIR_OpVisitState* visitor) {
duke@435	410	visitor->do_slow_case(_info);
duke@435	411	}
duke@435	412	#ifndef PRODUCT
duke@435	413	virtual void print_name(outputStream* out) const { out->print("PatchingStub"); }
duke@435	414	#endif // PRODUCT
duke@435	415	};
duke@435	416
duke@435	417
duke@435	418	class SimpleExceptionStub: public CodeStub {
duke@435	419	private:
duke@435	420	LIR_Opr _obj;
duke@435	421	Runtime1::StubID _stub;
duke@435	422	CodeEmitInfo* _info;
duke@435	423
duke@435	424	public:
duke@435	425	SimpleExceptionStub(Runtime1::StubID stub, LIR_Opr obj, CodeEmitInfo* info):
duke@435	426	_obj(obj), _info(info), _stub(stub) {
duke@435	427	}
duke@435	428
duke@435	429	virtual void emit_code(LIR_Assembler* e);
duke@435	430	virtual CodeEmitInfo* info() const { return _info; }
duke@435	431	virtual bool is_exception_throw_stub() const { return true; }
duke@435	432	virtual void visit(LIR_OpVisitState* visitor) {
duke@435	433	if (_obj->is_valid()) visitor->do_input(_obj);
duke@435	434	visitor->do_slow_case(_info);
duke@435	435	}
duke@435	436	#ifndef PRODUCT
duke@435	437	virtual void print_name(outputStream* out) const { out->print("SimpleExceptionStub"); }
duke@435	438	#endif // PRODUCT
duke@435	439	};
duke@435	440
duke@435	441
duke@435	442
duke@435	443	class ArrayStoreExceptionStub: public CodeStub {
duke@435	444	private:
duke@435	445	CodeEmitInfo* _info;
duke@435	446
duke@435	447	public:
duke@435	448	ArrayStoreExceptionStub(CodeEmitInfo* info);
duke@435	449	virtual void emit_code(LIR_Assembler* emit);
duke@435	450	virtual CodeEmitInfo* info() const { return _info; }
duke@435	451	virtual bool is_exception_throw_stub() const { return true; }
duke@435	452	virtual void visit(LIR_OpVisitState* visitor) {
duke@435	453	visitor->do_slow_case(_info);
duke@435	454	}
duke@435	455	#ifndef PRODUCT
duke@435	456	virtual void print_name(outputStream* out) const { out->print("ArrayStoreExceptionStub"); }
duke@435	457	#endif // PRODUCT
duke@435	458	};
duke@435	459
duke@435	460
duke@435	461	class ArrayCopyStub: public CodeStub {
duke@435	462	private:
duke@435	463	LIR_OpArrayCopy* _op;
duke@435	464
duke@435	465	public:
duke@435	466	ArrayCopyStub(LIR_OpArrayCopy* op): _op(op) { }
duke@435	467
duke@435	468	LIR_Opr src() const { return _op->src(); }
duke@435	469	LIR_Opr src_pos() const { return _op->src_pos(); }
duke@435	470	LIR_Opr dst() const { return _op->dst(); }
duke@435	471	LIR_Opr dst_pos() const { return _op->dst_pos(); }
duke@435	472	LIR_Opr length() const { return _op->length(); }
duke@435	473	LIR_Opr tmp() const { return _op->tmp(); }
duke@435	474
duke@435	475	virtual void emit_code(LIR_Assembler* e);
duke@435	476	virtual CodeEmitInfo* info() const { return _op->info(); }
duke@435	477	virtual void visit(LIR_OpVisitState* visitor) {
duke@435	478	// don't pass in the code emit info since it's processed in the fast path
duke@435	479	visitor->do_slow_case();
duke@435	480	}
duke@435	481	#ifndef PRODUCT
duke@435	482	virtual void print_name(outputStream* out) const { out->print("ArrayCopyStub"); }
duke@435	483	#endif // PRODUCT
duke@435	484	};
ysr@777	485
ysr@777	486	//////////////////////////////////////////////////////////////////////////////////////////
ysr@777	487	#ifndef SERIALGC
ysr@777	488
ysr@777	489	// Code stubs for Garbage-First barriers.
ysr@777	490	class G1PreBarrierStub: public CodeStub {
ysr@777	491	private:
ysr@777	492	LIR_Opr _addr;
ysr@777	493	LIR_Opr _pre_val;
ysr@777	494	LIR_PatchCode _patch_code;
ysr@777	495	CodeEmitInfo* _info;
ysr@777	496
ysr@777	497	public:
ysr@777	498	// pre_val (a temporary register) must be a register;
ysr@777	499	// addr (the address of the field to be read) must be a LIR_Address
ysr@777	500	G1PreBarrierStub(LIR_Opr addr, LIR_Opr pre_val, LIR_PatchCode patch_code, CodeEmitInfo* info) :
ysr@777	501	_addr(addr), _pre_val(pre_val), _patch_code(patch_code), _info(info)
ysr@777	502	{
ysr@777	503	assert(_pre_val->is_register(), "should be temporary register");
ysr@777	504	assert(_addr->is_address(), "should be the address of the field");
ysr@777	505	}
ysr@777	506
ysr@777	507	LIR_Opr addr() const { return _addr; }
ysr@777	508	LIR_Opr pre_val() const { return _pre_val; }
ysr@777	509	LIR_PatchCode patch_code() const { return _patch_code; }
ysr@777	510	CodeEmitInfo* info() const { return _info; }
ysr@777	511
ysr@777	512	virtual void emit_code(LIR_Assembler* e);
ysr@777	513	virtual void visit(LIR_OpVisitState* visitor) {
ysr@777	514	// don't pass in the code emit info since it's processed in the fast
ysr@777	515	// path
ysr@777	516	if (_info != NULL)
ysr@777	517	visitor->do_slow_case(_info);
ysr@777	518	else
ysr@777	519	visitor->do_slow_case();
ysr@777	520	visitor->do_input(_addr);
ysr@777	521	visitor->do_temp(_pre_val);
ysr@777	522	}
ysr@777	523	#ifndef PRODUCT
ysr@777	524	virtual void print_name(outputStream* out) const { out->print("G1PreBarrierStub"); }
ysr@777	525	#endif // PRODUCT
ysr@777	526	};
ysr@777	527
ysr@777	528	class G1PostBarrierStub: public CodeStub {
ysr@777	529	private:
ysr@777	530	LIR_Opr _addr;
ysr@777	531	LIR_Opr _new_val;
ysr@777	532
ysr@777	533	static jbyte* _byte_map_base;
ysr@777	534	static jbyte* byte_map_base_slow();
ysr@777	535	static jbyte* byte_map_base() {
ysr@777	536	if (_byte_map_base == NULL) {
ysr@777	537	_byte_map_base = byte_map_base_slow();
ysr@777	538	}
ysr@777	539	return _byte_map_base;
ysr@777	540	}
ysr@777	541
ysr@777	542	public:
ysr@777	543	// addr (the address of the object head) and new_val must be registers.
ysr@777	544	G1PostBarrierStub(LIR_Opr addr, LIR_Opr new_val): _addr(addr), _new_val(new_val) { }
ysr@777	545
ysr@777	546	LIR_Opr addr() const { return _addr; }
ysr@777	547	LIR_Opr new_val() const { return _new_val; }
ysr@777	548
ysr@777	549	virtual void emit_code(LIR_Assembler* e);
ysr@777	550	virtual void visit(LIR_OpVisitState* visitor) {
ysr@777	551	// don't pass in the code emit info since it's processed in the fast path
ysr@777	552	visitor->do_slow_case();
ysr@777	553	visitor->do_input(_addr);
ysr@777	554	visitor->do_input(_new_val);
ysr@777	555	}
ysr@777	556	#ifndef PRODUCT
ysr@777	557	virtual void print_name(outputStream* out) const { out->print("G1PostBarrierStub"); }
ysr@777	558	#endif // PRODUCT
ysr@777	559	};
ysr@777	560
ysr@777	561	#endif // SERIALGC
ysr@777	562	//////////////////////////////////////////////////////////////////////////////////////////