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src/cpu/sparc/vm/methodHandles_sparc.cpp@3d42f82cd811 (annotated)

src/cpu/sparc/vm/methodHandles_sparc.cpp

Thu, 21 Jul 2011 11:25:07 -0700

author

kvn

date

Thu, 21 Jul 2011 11:25:07 -0700

changeset 3037

3d42f82cd811

parent 3005

341a57af9b0a

child 3046

a19c671188cb

permissions

-rw-r--r--

7063628: Use cbcond on T4
Summary: Add new short branch instruction to Hotspot sparc assembler.
Reviewed-by: never, twisti, jrose

jrose@1145	1	/*
twisti@2436	2	* Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
jrose@1145	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jrose@1145	4	*
jrose@1145	5	* This code is free software; you can redistribute it and/or modify it
jrose@1145	6	* under the terms of the GNU General Public License version 2 only, as
jrose@1145	7	* published by the Free Software Foundation.
jrose@1145	8	*
jrose@1145	9	* This code is distributed in the hope that it will be useful, but WITHOUT
jrose@1145	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jrose@1145	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
jrose@1145	12	* version 2 for more details (a copy is included in the LICENSE file that
jrose@1145	13	* accompanied this code).
jrose@1145	14	*
jrose@1145	15	* You should have received a copy of the GNU General Public License version
jrose@1145	16	* 2 along with this work; if not, write to the Free Software Foundation,
jrose@1145	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jrose@1145	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
jrose@1145	22	*
jrose@1145	23	*/
jrose@1145	24
stefank@2314	25	#include "precompiled.hpp"
stefank@2314	26	#include "interpreter/interpreter.hpp"
stefank@2314	27	#include "memory/allocation.inline.hpp"
stefank@2314	28	#include "prims/methodHandles.hpp"
jrose@1145	29
jrose@1145	30	#define __ _masm->
jrose@1145	31
twisti@2204	32	#ifdef PRODUCT
twisti@2204	33	#define BLOCK_COMMENT(str) /* nothing */
twisti@2204	34	#else
twisti@2204	35	#define BLOCK_COMMENT(str) __ block_comment(str)
twisti@2204	36	#endif
twisti@2204	37
twisti@2204	38	#define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
twisti@2204	39
jrose@1145	40	address MethodHandleEntry::start_compiled_entry(MacroAssembler* _masm,
jrose@1145	41	address interpreted_entry) {
twisti@1858	42	// Just before the actual machine code entry point, allocate space
twisti@1858	43	// for a MethodHandleEntry::Data record, so that we can manage everything
twisti@1858	44	// from one base pointer.
jrose@1145	45	__ align(wordSize);
jrose@1145	46	address target = __ pc() + sizeof(Data);
jrose@1145	47	while (__ pc() < target) {
jrose@1145	48	__ nop();
jrose@1145	49	__ align(wordSize);
jrose@1145	50	}
jrose@1145	51
jrose@1145	52	MethodHandleEntry* me = (MethodHandleEntry*) __ pc();
jrose@1145	53	me->set_end_address(__ pc()); // set a temporary end_address
jrose@1145	54	me->set_from_interpreted_entry(interpreted_entry);
jrose@1145	55	me->set_type_checking_entry(NULL);
jrose@1145	56
jrose@1145	57	return (address) me;
jrose@1145	58	}
jrose@1145	59
jrose@1145	60	MethodHandleEntry* MethodHandleEntry::finish_compiled_entry(MacroAssembler* _masm,
jrose@1145	61	address start_addr) {
jrose@1145	62	MethodHandleEntry* me = (MethodHandleEntry*) start_addr;
jrose@1145	63	assert(me->end_address() == start_addr, "valid ME");
jrose@1145	64
jrose@1145	65	// Fill in the real end_address:
jrose@1145	66	__ align(wordSize);
jrose@1145	67	me->set_end_address(__ pc());
jrose@1145	68
jrose@1145	69	return me;
jrose@1145	70	}
jrose@1145	71
never@2950	72	// stack walking support
never@2950	73
never@2950	74	frame MethodHandles::ricochet_frame_sender(const frame& fr, RegisterMap *map) {
never@2950	75	//RicochetFrame* f = RicochetFrame::from_frame(fr);
never@2950	76	// Cf. is_interpreted_frame path of frame::sender
never@2950	77	intptr_t* younger_sp = fr.sp();
never@2950	78	intptr_t* sp = fr.sender_sp();
never@2950	79	map->make_integer_regs_unsaved();
never@2950	80	map->shift_window(sp, younger_sp);
never@2950	81	bool this_frame_adjusted_stack = true; // I5_savedSP is live in this RF
never@2950	82	return frame(sp, younger_sp, this_frame_adjusted_stack);
never@2950	83	}
never@2950	84
never@2950	85	void MethodHandles::ricochet_frame_oops_do(const frame& fr, OopClosure* blk, const RegisterMap* reg_map) {
never@2950	86	ResourceMark rm;
never@2950	87	RicochetFrame* f = RicochetFrame::from_frame(fr);
never@2950	88
never@2950	89	// pick up the argument type descriptor:
never@2950	90	Thread* thread = Thread::current();
never@2950	91	Handle cookie(thread, f->compute_saved_args_layout(true, true));
never@2950	92
never@2950	93	// process fixed part
never@2950	94	blk->do_oop((oop*)f->saved_target_addr());
never@2950	95	blk->do_oop((oop*)f->saved_args_layout_addr());
never@2950	96
never@2950	97	// process variable arguments:
never@2950	98	if (cookie.is_null()) return; // no arguments to describe
never@2950	99
never@2950	100	// the cookie is actually the invokeExact method for my target
never@2950	101	// his argument signature is what I'm interested in
never@2950	102	assert(cookie->is_method(), "");
never@2950	103	methodHandle invoker(thread, methodOop(cookie()));
never@2950	104	assert(invoker->name() == vmSymbols::invokeExact_name(), "must be this kind of method");
never@2950	105	assert(!invoker->is_static(), "must have MH argument");
never@2950	106	int slot_count = invoker->size_of_parameters();
never@2950	107	assert(slot_count >= 1, "must include 'this'");
never@2950	108	intptr_t* base = f->saved_args_base();
never@2950	109	intptr_t* retval = NULL;
never@2950	110	if (f->has_return_value_slot())
never@2950	111	retval = f->return_value_slot_addr();
never@2950	112	int slot_num = slot_count - 1;
never@2950	113	intptr_t* loc = &base[slot_num];
never@2950	114	//blk->do_oop((oop*) loc); // original target, which is irrelevant
never@2950	115	int arg_num = 0;
never@2950	116	for (SignatureStream ss(invoker->signature()); !ss.is_done(); ss.next()) {
never@2950	117	if (ss.at_return_type()) continue;
never@2950	118	BasicType ptype = ss.type();
never@2950	119	if (ptype == T_ARRAY) ptype = T_OBJECT; // fold all refs to T_OBJECT
never@2950	120	assert(ptype >= T_BOOLEAN && ptype <= T_OBJECT, "not array or void");
never@2950	121	slot_num -= type2size[ptype];
never@2950	122	loc = &base[slot_num];
never@2950	123	bool is_oop = (ptype == T_OBJECT && loc != retval);
never@2950	124	if (is_oop) blk->do_oop((oop*)loc);
never@2950	125	arg_num += 1;
never@2950	126	}
never@2950	127	assert(slot_num == 0, "must have processed all the arguments");
never@2950	128	}
never@2950	129
never@2950	130	// Ricochet Frames
never@2950	131	const Register MethodHandles::RicochetFrame::L1_continuation = L1;
never@2950	132	const Register MethodHandles::RicochetFrame::L2_saved_target = L2;
never@2950	133	const Register MethodHandles::RicochetFrame::L3_saved_args_layout = L3;
never@2950	134	const Register MethodHandles::RicochetFrame::L4_saved_args_base = L4; // cf. Gargs = G4
never@2950	135	const Register MethodHandles::RicochetFrame::L5_conversion = L5;
never@2950	136	#ifdef ASSERT
never@2950	137	const Register MethodHandles::RicochetFrame::L0_magic_number_1 = L0;
never@2950	138	#endif //ASSERT
never@2950	139
never@2950	140	oop MethodHandles::RicochetFrame::compute_saved_args_layout(bool read_cache, bool write_cache) {
never@2950	141	if (read_cache) {
never@2950	142	oop cookie = saved_args_layout();
never@2950	143	if (cookie != NULL) return cookie;
never@2950	144	}
never@2950	145	oop target = saved_target();
never@2950	146	oop mtype = java_lang_invoke_MethodHandle::type(target);
never@2950	147	oop mtform = java_lang_invoke_MethodType::form(mtype);
never@2950	148	oop cookie = java_lang_invoke_MethodTypeForm::vmlayout(mtform);
never@2950	149	if (write_cache) {
never@2950	150	(*saved_args_layout_addr()) = cookie;
never@2950	151	}
never@2950	152	return cookie;
never@2950	153	}
never@2950	154
never@2950	155	void MethodHandles::RicochetFrame::generate_ricochet_blob(MacroAssembler* _masm,
never@2950	156	// output params:
never@2950	157	int* bounce_offset,
never@2950	158	int* exception_offset,
never@2950	159	int* frame_size_in_words) {
never@2950	160	(*frame_size_in_words) = RicochetFrame::frame_size_in_bytes() / wordSize;
never@2950	161
never@2950	162	address start = __ pc();
never@2950	163
never@2950	164	#ifdef ASSERT
never@2950	165	__ illtrap(0); __ illtrap(0); __ illtrap(0);
never@2950	166	// here's a hint of something special:
never@2950	167	__ set(MAGIC_NUMBER_1, G0);
never@2950	168	__ set(MAGIC_NUMBER_2, G0);
never@2950	169	#endif //ASSERT
never@2950	170	__ illtrap(0); // not reached
never@2950	171
never@2950	172	// Return values are in registers.
never@2950	173	// L1_continuation contains a cleanup continuation we must return
never@2950	174	// to.
never@2950	175
never@2950	176	(*bounce_offset) = __ pc() - start;
never@2950	177	BLOCK_COMMENT("ricochet_blob.bounce");
never@2950	178
never@2950	179	if (VerifyMethodHandles) RicochetFrame::verify_clean(_masm);
never@2950	180	trace_method_handle(_masm, "ricochet_blob.bounce");
never@2950	181
never@2950	182	__ JMP(L1_continuation, 0);
never@2950	183	__ delayed()->nop();
never@2950	184	__ illtrap(0);
never@2950	185
never@2950	186	DEBUG_ONLY(__ set(MAGIC_NUMBER_2, G0));
never@2950	187
never@2950	188	(*exception_offset) = __ pc() - start;
never@2950	189	BLOCK_COMMENT("ricochet_blob.exception");
never@2950	190
never@2950	191	// compare this to Interpreter::rethrow_exception_entry, which is parallel code
never@2950	192	// for example, see TemplateInterpreterGenerator::generate_throw_exception
never@2950	193	// Live registers in:
never@2950	194	// Oexception (O0): exception
never@2950	195	// Oissuing_pc (O1): return address/pc that threw exception (ignored, always equal to bounce addr)
never@2950	196	__ verify_oop(Oexception);
never@2950	197
never@2950	198	// Take down the frame.
never@2950	199
never@2950	200	// Cf. InterpreterMacroAssembler::remove_activation.
never@2950	201	leave_ricochet_frame(_masm, /*recv_reg=*/ noreg, I5_savedSP, I7);
never@2950	202
never@2950	203	// We are done with this activation frame; find out where to go next.
never@2950	204	// The continuation point will be an exception handler, which expects
never@2950	205	// the following registers set up:
never@2950	206	//
never@2950	207	// Oexception: exception
never@2950	208	// Oissuing_pc: the local call that threw exception
never@2950	209	// Other On: garbage
never@2950	210	// In/Ln: the contents of the caller's register window
never@2950	211	//
never@2950	212	// We do the required restore at the last possible moment, because we
never@2950	213	// need to preserve some state across a runtime call.
never@2950	214	// (Remember that the caller activation is unknown--it might not be
never@2950	215	// interpreted, so things like Lscratch are useless in the caller.)
never@2950	216	__ mov(Oexception, Oexception ->after_save()); // get exception in I0 so it will be on O0 after restore
never@2950	217	__ add(I7, frame::pc_return_offset, Oissuing_pc->after_save()); // likewise set I1 to a value local to the caller
never@2950	218	__ call_VM_leaf(L7_thread_cache,
never@2950	219	CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address),
never@2950	220	G2_thread, Oissuing_pc->after_save());
never@2950	221
never@2950	222	// The caller's SP was adjusted upon method entry to accomodate
never@2950	223	// the callee's non-argument locals. Undo that adjustment.
never@2950	224	__ JMP(O0, 0); // return exception handler in caller
never@2950	225	__ delayed()->restore(I5_savedSP, G0, SP);
never@2950	226
never@2950	227	// (same old exception object is already in Oexception; see above)
never@2950	228	// Note that an "issuing PC" is actually the next PC after the call
never@2950	229	}
never@2950	230
never@2950	231	void MethodHandles::RicochetFrame::enter_ricochet_frame(MacroAssembler* _masm,
never@2950	232	Register recv_reg,
never@2950	233	Register argv_reg,
never@2950	234	address return_handler) {
never@2950	235	// does not include the __ save()
never@2950	236	assert(argv_reg == Gargs, "");
never@2950	237	Address G3_mh_vmtarget( recv_reg, java_lang_invoke_MethodHandle::vmtarget_offset_in_bytes());
never@2950	238	Address G3_amh_conversion(recv_reg, java_lang_invoke_AdapterMethodHandle::conversion_offset_in_bytes());
never@2950	239
never@2950	240	// Create the RicochetFrame.
never@2950	241	// Unlike on x86 we can store all required information in local
never@2950	242	// registers.
never@2950	243	BLOCK_COMMENT("push RicochetFrame {");
never@2950	244	__ set(ExternalAddress(return_handler), L1_continuation);
never@2950	245	__ load_heap_oop(G3_mh_vmtarget, L2_saved_target);
never@2950	246	__ mov(G0, L3_saved_args_layout);
never@2950	247	__ mov(Gargs, L4_saved_args_base);
never@2950	248	__ lduw(G3_amh_conversion, L5_conversion); // 32-bit field
never@2950	249	// I5, I6, I7 are already set up
never@2950	250	DEBUG_ONLY(__ set((int32_t) MAGIC_NUMBER_1, L0_magic_number_1));
never@2950	251	BLOCK_COMMENT("} RicochetFrame");
never@2950	252	}
never@2950	253
never@2950	254	void MethodHandles::RicochetFrame::leave_ricochet_frame(MacroAssembler* _masm,
never@2950	255	Register recv_reg,
never@2950	256	Register new_sp_reg,
never@2950	257	Register sender_pc_reg) {
never@2950	258	assert(new_sp_reg == I5_savedSP, "exact_sender_sp already in place");
never@2950	259	assert(sender_pc_reg == I7, "in a fixed place");
never@2950	260	// does not include the __ ret() & __ restore()
never@2950	261	assert_different_registers(recv_reg, new_sp_reg, sender_pc_reg);
never@2950	262	// Take down the frame.
never@2950	263	// Cf. InterpreterMacroAssembler::remove_activation.
never@2950	264	BLOCK_COMMENT("end_ricochet_frame {");
never@2950	265	if (recv_reg->is_valid())
never@2950	266	__ mov(L2_saved_target, recv_reg);
never@2950	267	BLOCK_COMMENT("} end_ricochet_frame");
never@2950	268	}
never@2950	269
never@2950	270	// Emit code to verify that FP is pointing at a valid ricochet frame.
never@2950	271	#ifdef ASSERT
never@2950	272	enum {
never@2954	273	ARG_LIMIT = 255, SLOP = 45,
never@2950	274	// use this parameter for checking for garbage stack movements:
never@2950	275	UNREASONABLE_STACK_MOVE = (ARG_LIMIT + SLOP)
never@2950	276	// the slop defends against false alarms due to fencepost errors
never@2950	277	};
never@2950	278
never@2950	279	void MethodHandles::RicochetFrame::verify_clean(MacroAssembler* _masm) {
never@2950	280	// The stack should look like this:
never@2950	281	// ... keep1 | dest=42 | keep2 | magic | handler | magic | recursive args | [RF]
never@2950	282	// Check various invariants.
never@2950	283
never@2950	284	Register O7_temp = O7, O5_temp = O5;
never@2950	285
never@2950	286	Label L_ok_1, L_ok_2, L_ok_3, L_ok_4;
never@2950	287	BLOCK_COMMENT("verify_clean {");
never@2950	288	// Magic numbers must check out:
never@2950	289	__ set((int32_t) MAGIC_NUMBER_1, O7_temp);
kvn@3037	290	__ cmp_and_br_short(O7_temp, L0_magic_number_1, Assembler::equal, Assembler::pt, L_ok_1);
never@2950	291	__ stop("damaged ricochet frame: MAGIC_NUMBER_1 not found");
never@2950	292
never@2950	293	__ BIND(L_ok_1);
never@2950	294
never@2950	295	// Arguments pointer must look reasonable:
never@2950	296	#ifdef _LP64
never@2950	297	Register FP_temp = O5_temp;
never@2950	298	__ add(FP, STACK_BIAS, FP_temp);
never@2950	299	#else
never@2950	300	Register FP_temp = FP;
never@2950	301	#endif
kvn@3037	302	__ cmp_and_brx_short(L4_saved_args_base, FP_temp, Assembler::greaterEqualUnsigned, Assembler::pt, L_ok_2);
never@2950	303	__ stop("damaged ricochet frame: L4 < FP");
never@2950	304
never@2950	305	__ BIND(L_ok_2);
never@2978	306	// Disable until we decide on it's fate
never@2978	307	// __ sub(L4_saved_args_base, UNREASONABLE_STACK_MOVE * Interpreter::stackElementSize, O7_temp);
never@2978	308	// __ cmp(O7_temp, FP_temp);
never@2978	309	// __ br(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok_3);
never@2978	310	// __ delayed()->nop();
never@2978	311	// __ stop("damaged ricochet frame: (L4 - UNREASONABLE_STACK_MOVE) > FP");
never@2950	312
never@2950	313	__ BIND(L_ok_3);
never@2950	314	extract_conversion_dest_type(_masm, L5_conversion, O7_temp);
kvn@3037	315	__ cmp_and_br_short(O7_temp, T_VOID, Assembler::equal, Assembler::pt, L_ok_4);
never@2950	316	extract_conversion_vminfo(_masm, L5_conversion, O5_temp);
never@2950	317	__ ld_ptr(L4_saved_args_base, __ argument_offset(O5_temp, O5_temp), O7_temp);
never@2950	318	assert(__ is_simm13(RETURN_VALUE_PLACEHOLDER), "must be simm13");
kvn@3037	319	__ cmp_and_brx_short(O7_temp, (int32_t) RETURN_VALUE_PLACEHOLDER, Assembler::equal, Assembler::pt, L_ok_4);
never@2950	320	__ stop("damaged ricochet frame: RETURN_VALUE_PLACEHOLDER not found");
never@2950	321	__ BIND(L_ok_4);
never@2950	322	BLOCK_COMMENT("} verify_clean");
never@2950	323	}
never@2950	324	#endif //ASSERT
never@2950	325
never@2950	326	void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, Register temp_reg, Register temp2_reg) {
never@2950	327	if (VerifyMethodHandles)
never@2950	328	verify_klass(_masm, klass_reg, SystemDictionaryHandles::Class_klass(), temp_reg, temp2_reg,
never@2950	329	"AMH argument is a Class");
never@2950	330	__ load_heap_oop(Address(klass_reg, java_lang_Class::klass_offset_in_bytes()), klass_reg);
never@2950	331	}
never@2950	332
never@2950	333	void MethodHandles::load_conversion_vminfo(MacroAssembler* _masm, Address conversion_field_addr, Register reg) {
never@2950	334	assert(CONV_VMINFO_SHIFT == 0, "preshifted");
never@2950	335	assert(CONV_VMINFO_MASK == right_n_bits(BitsPerByte), "else change type of following load");
never@2950	336	__ ldub(conversion_field_addr.plus_disp(BytesPerInt - 1), reg);
never@2950	337	}
never@2950	338
never@2950	339	void MethodHandles::extract_conversion_vminfo(MacroAssembler* _masm, Register conversion_field_reg, Register reg) {
never@2950	340	assert(CONV_VMINFO_SHIFT == 0, "preshifted");
never@2950	341	__ and3(conversion_field_reg, CONV_VMINFO_MASK, reg);
never@2950	342	}
never@2950	343
never@2950	344	void MethodHandles::extract_conversion_dest_type(MacroAssembler* _masm, Register conversion_field_reg, Register reg) {
never@2950	345	__ srl(conversion_field_reg, CONV_DEST_TYPE_SHIFT, reg);
never@2950	346	__ and3(reg, 0x0F, reg);
never@2950	347	}
never@2950	348
never@2950	349	void MethodHandles::load_stack_move(MacroAssembler* _masm,
never@2950	350	Address G3_amh_conversion,
never@2950	351	Register stack_move_reg) {
never@2950	352	BLOCK_COMMENT("load_stack_move {");
never@2950	353	__ ldsw(G3_amh_conversion, stack_move_reg);
never@2950	354	__ sra(stack_move_reg, CONV_STACK_MOVE_SHIFT, stack_move_reg);
never@2950	355	if (VerifyMethodHandles) {
never@2950	356	Label L_ok, L_bad;
never@2950	357	int32_t stack_move_limit = 0x0800; // extra-large
kvn@3037	358	__ cmp_and_br_short(stack_move_reg, stack_move_limit, Assembler::greaterEqual, Assembler::pn, L_bad);
never@2950	359	__ cmp(stack_move_reg, -stack_move_limit);
never@2950	360	__ br(Assembler::greater, false, Assembler::pt, L_ok);
never@2950	361	__ delayed()->nop();
never@2950	362	__ BIND(L_bad);
never@2950	363	__ stop("load_stack_move of garbage value");
never@2950	364	__ BIND(L_ok);
never@2950	365	}
never@2950	366	BLOCK_COMMENT("} load_stack_move");
never@2950	367	}
never@2950	368
never@2950	369	#ifdef ASSERT
never@2950	370	void MethodHandles::RicochetFrame::verify() const {
never@2950	371	assert(magic_number_1() == MAGIC_NUMBER_1, "");
never@2950	372	if (!Universe::heap()->is_gc_active()) {
never@2950	373	if (saved_args_layout() != NULL) {
never@2950	374	assert(saved_args_layout()->is_method(), "must be valid oop");
never@2950	375	}
never@2950	376	if (saved_target() != NULL) {
never@2950	377	assert(java_lang_invoke_MethodHandle::is_instance(saved_target()), "checking frame value");
never@2950	378	}
never@2950	379	}
never@2950	380	int conv_op = adapter_conversion_op(conversion());
never@2950	381	assert(conv_op == java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS ||
never@2950	382	conv_op == java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS ||
never@2950	383	conv_op == java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF,
never@2950	384	"must be a sane conversion");
never@2950	385	if (has_return_value_slot()) {
never@2950	386	assert(*return_value_slot_addr() == RETURN_VALUE_PLACEHOLDER, "");
never@2950	387	}
never@2950	388	}
never@2950	389
never@2950	390	void MethodHandles::verify_argslot(MacroAssembler* _masm, Register argslot_reg, Register temp_reg, const char* error_message) {
never@2950	391	// Verify that argslot lies within (Gargs, FP].
never@2950	392	Label L_ok, L_bad;
never@2950	393	BLOCK_COMMENT("verify_argslot {");
kvn@3037	394	__ cmp_and_brx_short(Gargs, argslot_reg, Assembler::greaterUnsigned, Assembler::pn, L_bad);
never@2950	395	__ add(FP, STACK_BIAS, temp_reg); // STACK_BIAS is zero on !_LP64
kvn@3037	396	__ cmp_and_brx_short(argslot_reg, temp_reg, Assembler::lessEqualUnsigned, Assembler::pt, L_ok);
never@2950	397	__ BIND(L_bad);
never@2950	398	__ stop(error_message);
never@2950	399	__ BIND(L_ok);
never@2950	400	BLOCK_COMMENT("} verify_argslot");
never@2950	401	}
never@2950	402
never@2950	403	void MethodHandles::verify_argslots(MacroAssembler* _masm,
never@2950	404	RegisterOrConstant arg_slots,
never@2950	405	Register arg_slot_base_reg,
never@2950	406	Register temp_reg,
never@2950	407	Register temp2_reg,
never@2950	408	bool negate_argslots,
never@2950	409	const char* error_message) {
never@2950	410	// Verify that [argslot..argslot+size) lies within (Gargs, FP).
never@2950	411	Label L_ok, L_bad;
never@2950	412	BLOCK_COMMENT("verify_argslots {");
never@2950	413	if (negate_argslots) {
never@2950	414	if (arg_slots.is_constant()) {
never@2950	415	arg_slots = -1 * arg_slots.as_constant();
never@2950	416	} else {
never@2950	417	__ neg(arg_slots.as_register(), temp_reg);
never@2950	418	arg_slots = temp_reg;
never@2950	419	}
never@2950	420	}
never@2950	421	__ add(arg_slot_base_reg, __ argument_offset(arg_slots, temp_reg), temp_reg);
never@2950	422	__ add(FP, STACK_BIAS, temp2_reg); // STACK_BIAS is zero on !_LP64
kvn@3037	423	__ cmp_and_brx_short(temp_reg, temp2_reg, Assembler::greaterUnsigned, Assembler::pn, L_bad);
never@2950	424	// Gargs points to the first word so adjust by BytesPerWord
never@2950	425	__ add(arg_slot_base_reg, BytesPerWord, temp_reg);
kvn@3037	426	__ cmp_and_brx_short(Gargs, temp_reg, Assembler::lessEqualUnsigned, Assembler::pt, L_ok);
never@2950	427	__ BIND(L_bad);
never@2950	428	__ stop(error_message);
never@2950	429	__ BIND(L_ok);
never@2950	430	BLOCK_COMMENT("} verify_argslots");
never@2950	431	}
never@2950	432
never@2950	433	// Make sure that arg_slots has the same sign as the given direction.
never@2950	434	// If (and only if) arg_slots is a assembly-time constant, also allow it to be zero.
never@2950	435	void MethodHandles::verify_stack_move(MacroAssembler* _masm,
never@2950	436	RegisterOrConstant arg_slots, int direction) {
never@2950	437	enum { UNREASONABLE_STACK_MOVE = 256 * 4 }; // limit of 255 arguments
never@2950	438	bool allow_zero = arg_slots.is_constant();
never@2950	439	if (direction == 0) { direction = +1; allow_zero = true; }
never@2950	440	assert(stack_move_unit() == -1, "else add extra checks here");
never@2950	441	if (arg_slots.is_register()) {
never@2950	442	Label L_ok, L_bad;
never@2950	443	BLOCK_COMMENT("verify_stack_move {");
never@2950	444	// __ btst(-stack_move_unit() - 1, arg_slots.as_register()); // no need
never@2950	445	// __ br(Assembler::notZero, false, Assembler::pn, L_bad);
never@2950	446	// __ delayed()->nop();
never@2950	447	__ cmp(arg_slots.as_register(), (int32_t) NULL_WORD);
never@2950	448	if (direction > 0) {
never@2950	449	__ br(allow_zero ? Assembler::less : Assembler::lessEqual, false, Assembler::pn, L_bad);
never@2950	450	__ delayed()->nop();
never@2950	451	__ cmp(arg_slots.as_register(), (int32_t) UNREASONABLE_STACK_MOVE);
never@2950	452	__ br(Assembler::less, false, Assembler::pn, L_ok);
never@2950	453	__ delayed()->nop();
never@2950	454	} else {
never@2950	455	__ br(allow_zero ? Assembler::greater : Assembler::greaterEqual, false, Assembler::pn, L_bad);
never@2950	456	__ delayed()->nop();
never@2950	457	__ cmp(arg_slots.as_register(), (int32_t) -UNREASONABLE_STACK_MOVE);
never@2950	458	__ br(Assembler::greater, false, Assembler::pn, L_ok);
never@2950	459	__ delayed()->nop();
never@2950	460	}
never@2950	461	__ BIND(L_bad);
never@2950	462	if (direction > 0)
never@2950	463	__ stop("assert arg_slots > 0");
never@2950	464	else
never@2950	465	__ stop("assert arg_slots < 0");
never@2950	466	__ BIND(L_ok);
never@2950	467	BLOCK_COMMENT("} verify_stack_move");
never@2950	468	} else {
never@2950	469	intptr_t size = arg_slots.as_constant();
never@2950	470	if (direction < 0) size = -size;
never@2950	471	assert(size >= 0, "correct direction of constant move");
never@2950	472	assert(size < UNREASONABLE_STACK_MOVE, "reasonable size of constant move");
never@2950	473	}
never@2950	474	}
never@2950	475
never@2950	476	void MethodHandles::verify_klass(MacroAssembler* _masm,
never@2950	477	Register obj_reg, KlassHandle klass,
never@2950	478	Register temp_reg, Register temp2_reg,
never@2950	479	const char* error_message) {
never@2950	480	oop* klass_addr = klass.raw_value();
never@2950	481	assert(klass_addr >= SystemDictionaryHandles::Object_klass().raw_value() &&
never@2950	482	klass_addr <= SystemDictionaryHandles::Long_klass().raw_value(),
never@2950	483	"must be one of the SystemDictionaryHandles");
never@2950	484	Label L_ok, L_bad;
never@2950	485	BLOCK_COMMENT("verify_klass {");
never@2950	486	__ verify_oop(obj_reg);
kvn@3037	487	__ br_null_short(obj_reg, Assembler::pn, L_bad);
never@2950	488	__ load_klass(obj_reg, temp_reg);
never@2950	489	__ set(ExternalAddress(klass_addr), temp2_reg);
never@2950	490	__ ld_ptr(Address(temp2_reg, 0), temp2_reg);
kvn@3037	491	__ cmp_and_brx_short(temp_reg, temp2_reg, Assembler::equal, Assembler::pt, L_ok);
never@2950	492	intptr_t super_check_offset = klass->super_check_offset();
never@2950	493	__ ld_ptr(Address(temp_reg, super_check_offset), temp_reg);
never@2950	494	__ set(ExternalAddress(klass_addr), temp2_reg);
never@2950	495	__ ld_ptr(Address(temp2_reg, 0), temp2_reg);
kvn@3037	496	__ cmp_and_brx_short(temp_reg, temp2_reg, Assembler::equal, Assembler::pt, L_ok);
never@2950	497	__ BIND(L_bad);
never@2950	498	__ stop(error_message);
never@2950	499	__ BIND(L_ok);
never@2950	500	BLOCK_COMMENT("} verify_klass");
never@2950	501	}
never@2950	502	#endif // ASSERT
jrose@1145	503
never@3005	504
never@3005	505	void MethodHandles::jump_from_method_handle(MacroAssembler* _masm, Register method, Register target, Register temp) {
never@3005	506	assert(method == G5_method, "interpreter calling convention");
never@3005	507	__ verify_oop(method);
never@3005	508	__ ld_ptr(G5_method, in_bytes(methodOopDesc::from_interpreted_offset()), target);
never@3005	509	if (JvmtiExport::can_post_interpreter_events()) {
never@3005	510	// JVMTI events, such as single-stepping, are implemented partly by avoiding running
never@3005	511	// compiled code in threads for which the event is enabled. Check here for
never@3005	512	// interp_only_mode if these events CAN be enabled.
never@3005	513	__ verify_thread();
never@3005	514	Label skip_compiled_code;
never@3005	515
never@3005	516	const Address interp_only(G2_thread, JavaThread::interp_only_mode_offset());
never@3005	517	__ ld(interp_only, temp);
never@3005	518	__ tst(temp);
never@3005	519	__ br(Assembler::notZero, true, Assembler::pn, skip_compiled_code);
never@3005	520	__ delayed()->ld_ptr(G5_method, in_bytes(methodOopDesc::interpreter_entry_offset()), target);
never@3005	521	__ bind(skip_compiled_code);
never@3005	522	}
never@3005	523	__ jmp(target, 0);
never@3005	524	__ delayed()->nop();
never@3005	525	}
never@3005	526
never@3005	527
jrose@1145	528	// Code generation
jrose@1145	529	address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) {
twisti@2271	530	// I5_savedSP/O5_savedSP: sender SP (must preserve)
twisti@1858	531	// G4 (Gargs): incoming argument list (must preserve)
twisti@2271	532	// G5_method: invoke methodOop
twisti@1858	533	// G3_method_handle: receiver method handle (must load from sp[MethodTypeForm.vmslots])
twisti@2271	534	// O0, O1, O2, O3, O4: garbage temps, blown away
twisti@2271	535	Register O0_mtype = O0;
twisti@1858	536	Register O1_scratch = O1;
jrose@2266	537	Register O2_scratch = O2;
jrose@2266	538	Register O3_scratch = O3;
twisti@2271	539	Register O4_argslot = O4;
jrose@2266	540	Register O4_argbase = O4;
twisti@1858	541
twisti@1858	542	// emit WrongMethodType path first, to enable back-branch from main path
twisti@1858	543	Label wrong_method_type;
twisti@1858	544	__ bind(wrong_method_type);
jrose@2266	545	Label invoke_generic_slow_path;
jrose@2266	546	assert(methodOopDesc::intrinsic_id_size_in_bytes() == sizeof(u1), "");;
jrose@2266	547	__ ldub(Address(G5_method, methodOopDesc::intrinsic_id_offset_in_bytes()), O1_scratch);
jrose@2266	548	__ cmp(O1_scratch, (int) vmIntrinsics::_invokeExact);
jrose@2266	549	__ brx(Assembler::notEqual, false, Assembler::pt, invoke_generic_slow_path);
jrose@2266	550	__ delayed()->nop();
twisti@2271	551	__ mov(O0_mtype, G5_method_type); // required by throw_WrongMethodType
never@2978	552	__ mov(G3_method_handle, G3_method_handle); // already in this register
never@2978	553	// O0 will be filled in with JavaThread in stub
never@2978	554	__ jump_to(AddressLiteral(StubRoutines::throw_WrongMethodTypeException_entry()), O3_scratch);
twisti@1858	555	__ delayed()->nop();
twisti@1858	556
twisti@1858	557	// here's where control starts out:
twisti@1858	558	__ align(CodeEntryAlignment);
twisti@1858	559	address entry_point = __ pc();
twisti@1858	560
jrose@2266	561	// fetch the MethodType from the method handle
never@2950	562	// FIXME: Interpreter should transmit pre-popped stack pointer, to locate base of arg list.
never@2950	563	// This would simplify several touchy bits of code.
never@2950	564	// See 6984712: JSR 292 method handle calls need a clean argument base pointer
twisti@1858	565	{
twisti@1858	566	Register tem = G5_method;
twisti@1858	567	for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) {
twisti@2271	568	__ ld_ptr(Address(tem, *pchase), O0_mtype);
twisti@2271	569	tem = O0_mtype; // in case there is another indirection
twisti@1858	570	}
twisti@1858	571	}
twisti@1858	572
twisti@1858	573	// given the MethodType, find out where the MH argument is buried
jrose@2639	574	__ load_heap_oop(Address(O0_mtype, __ delayed_value(java_lang_invoke_MethodType::form_offset_in_bytes, O1_scratch)), O4_argslot);
jrose@2639	575	__ ldsw( Address(O4_argslot, __ delayed_value(java_lang_invoke_MethodTypeForm::vmslots_offset_in_bytes, O1_scratch)), O4_argslot);
never@2950	576	__ add(__ argument_address(O4_argslot, O4_argslot, 1), O4_argbase);
jrose@2266	577	// Note: argument_address uses its input as a scratch register!
never@2950	578	Address mh_receiver_slot_addr(O4_argbase, -Interpreter::stackElementSize);
never@2950	579	__ ld_ptr(mh_receiver_slot_addr, G3_method_handle);
twisti@1858	580
jrose@2266	581	trace_method_handle(_masm, "invokeExact");
jrose@2266	582
twisti@2271	583	__ check_method_handle_type(O0_mtype, G3_method_handle, O1_scratch, wrong_method_type);
never@2950	584
never@2950	585	// Nobody uses the MH receiver slot after this. Make sure.
never@2950	586	DEBUG_ONLY(__ set((int32_t) 0x999999, O1_scratch); __ st_ptr(O1_scratch, mh_receiver_slot_addr));
never@2950	587
twisti@1858	588	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	589
jrose@2266	590	// for invokeGeneric (only), apply argument and result conversions on the fly
jrose@2266	591	__ bind(invoke_generic_slow_path);
jrose@2266	592	#ifdef ASSERT
never@2950	593	if (VerifyMethodHandles) {
never@2950	594	Label L;
jrose@2266	595	__ ldub(Address(G5_method, methodOopDesc::intrinsic_id_offset_in_bytes()), O1_scratch);
jrose@2266	596	__ cmp(O1_scratch, (int) vmIntrinsics::_invokeGeneric);
jrose@2266	597	__ brx(Assembler::equal, false, Assembler::pt, L);
jrose@2266	598	__ delayed()->nop();
jrose@2266	599	__ stop("bad methodOop::intrinsic_id");
jrose@2266	600	__ bind(L);
jrose@2266	601	}
jrose@2266	602	#endif //ASSERT
jrose@2266	603
jrose@2266	604	// make room on the stack for another pointer:
never@2950	605	insert_arg_slots(_masm, 2 * stack_move_unit(), O4_argbase, O1_scratch, O2_scratch, O3_scratch);
jrose@2266	606	// load up an adapter from the calling type (Java weaves this)
jrose@2266	607	Register O2_form = O2_scratch;
jrose@2266	608	Register O3_adapter = O3_scratch;
jrose@2639	609	__ load_heap_oop(Address(O0_mtype, __ delayed_value(java_lang_invoke_MethodType::form_offset_in_bytes, O1_scratch)), O2_form);
twisti@2903	610	__ load_heap_oop(Address(O2_form, __ delayed_value(java_lang_invoke_MethodTypeForm::genericInvoker_offset_in_bytes, O1_scratch)), O3_adapter);
twisti@2903	611	__ verify_oop(O3_adapter);
jrose@2266	612	__ st_ptr(O3_adapter, Address(O4_argbase, 1 * Interpreter::stackElementSize));
jrose@2266	613	// As a trusted first argument, pass the type being called, so the adapter knows
jrose@2266	614	// the actual types of the arguments and return values.
jrose@2266	615	// (Generic invokers are shared among form-families of method-type.)
twisti@2271	616	__ st_ptr(O0_mtype, Address(O4_argbase, 0 * Interpreter::stackElementSize));
jrose@2266	617	// FIXME: assert that O3_adapter is of the right method-type.
jrose@2266	618	__ mov(O3_adapter, G3_method_handle);
jrose@2266	619	trace_method_handle(_masm, "invokeGeneric");
jrose@2266	620	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
jrose@2266	621
twisti@1858	622	return entry_point;
jrose@1145	623	}
jrose@1145	624
never@2950	625	// Workaround for C++ overloading nastiness on '0' for RegisterOrConstant.
never@2950	626	static RegisterOrConstant constant(int value) {
never@2950	627	return RegisterOrConstant(value);
never@2950	628	}
twisti@1858	629
never@2950	630	static void load_vmargslot(MacroAssembler* _masm, Address vmargslot_addr, Register result) {
never@2950	631	__ ldsw(vmargslot_addr, result);
never@2950	632	}
never@2950	633
never@2950	634	static RegisterOrConstant adjust_SP_and_Gargs_down_by_slots(MacroAssembler* _masm,
never@2950	635	RegisterOrConstant arg_slots,
never@2950	636	Register temp_reg, Register temp2_reg) {
never@2950	637	// Keep the stack pointer 2*wordSize aligned.
never@2950	638	const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
never@2950	639	if (arg_slots.is_constant()) {
never@2950	640	const int offset = arg_slots.as_constant() << LogBytesPerWord;
never@2950	641	const int masked_offset = round_to(offset, 2 * BytesPerWord);
never@2950	642	const int masked_offset2 = (offset + 1*BytesPerWord) & ~TwoWordAlignmentMask;
never@2950	643	assert(masked_offset == masked_offset2, "must agree");
never@2950	644	__ sub(Gargs, offset, Gargs);
never@2950	645	__ sub(SP, masked_offset, SP );
never@2950	646	return offset;
never@2950	647	} else {
twisti@1858	648	#ifdef ASSERT
never@2950	649	{
never@2950	650	Label L_ok;
kvn@3037	651	__ cmp_and_br_short(arg_slots.as_register(), 0, Assembler::greaterEqual, Assembler::pt, L_ok);
never@2950	652	__ stop("negative arg_slots");
never@2950	653	__ bind(L_ok);
never@2950	654	}
twisti@1858	655	#endif
never@2950	656	__ sll_ptr(arg_slots.as_register(), LogBytesPerWord, temp_reg);
never@2950	657	__ add( temp_reg, 1*BytesPerWord, temp2_reg);
never@2950	658	__ andn(temp2_reg, TwoWordAlignmentMask, temp2_reg);
never@2950	659	__ sub(Gargs, temp_reg, Gargs);
never@2950	660	__ sub(SP, temp2_reg, SP );
never@2950	661	return temp_reg;
never@2950	662	}
twisti@1858	663	}
twisti@1858	664
never@2950	665	static RegisterOrConstant adjust_SP_and_Gargs_up_by_slots(MacroAssembler* _masm,
never@2950	666	RegisterOrConstant arg_slots,
never@2950	667	Register temp_reg, Register temp2_reg) {
never@2950	668	// Keep the stack pointer 2*wordSize aligned.
never@2950	669	const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
never@2950	670	if (arg_slots.is_constant()) {
never@2950	671	const int offset = arg_slots.as_constant() << LogBytesPerWord;
never@2950	672	const int masked_offset = offset & ~TwoWordAlignmentMask;
never@2950	673	__ add(Gargs, offset, Gargs);
never@2950	674	__ add(SP, masked_offset, SP );
never@2950	675	return offset;
never@2950	676	} else {
never@2950	677	__ sll_ptr(arg_slots.as_register(), LogBytesPerWord, temp_reg);
never@2950	678	__ andn(temp_reg, TwoWordAlignmentMask, temp2_reg);
never@2950	679	__ add(Gargs, temp_reg, Gargs);
never@2950	680	__ add(SP, temp2_reg, SP );
never@2950	681	return temp_reg;
never@2950	682	}
never@2950	683	}
twisti@1858	684
twisti@1858	685	// Helper to insert argument slots into the stack.
never@2950	686	// arg_slots must be a multiple of stack_move_unit() and < 0
never@2950	687	// argslot_reg is decremented to point to the new (shifted) location of the argslot
never@2950	688	// But, temp_reg ends up holding the original value of argslot_reg.
twisti@1858	689	void MethodHandles::insert_arg_slots(MacroAssembler* _masm,
twisti@1858	690	RegisterOrConstant arg_slots,
twisti@1858	691	Register argslot_reg,
twisti@1858	692	Register temp_reg, Register temp2_reg, Register temp3_reg) {
never@2950	693	// allow constant zero
never@2950	694	if (arg_slots.is_constant() && arg_slots.as_constant() == 0)
never@2950	695	return;
never@2950	696
twisti@1858	697	assert_different_registers(argslot_reg, temp_reg, temp2_reg, temp3_reg,
twisti@1858	698	(!arg_slots.is_register() ? Gargs : arg_slots.as_register()));
twisti@1858	699
never@2950	700	BLOCK_COMMENT("insert_arg_slots {");
never@2950	701	if (VerifyMethodHandles)
never@2950	702	verify_argslot(_masm, argslot_reg, temp_reg, "insertion point must fall within current frame");
never@2950	703	if (VerifyMethodHandles)
never@2950	704	verify_stack_move(_masm, arg_slots, -1);
twisti@1858	705
twisti@1858	706	// Make space on the stack for the inserted argument(s).
twisti@1858	707	// Then pull down everything shallower than argslot_reg.
twisti@1858	708	// The stacked return address gets pulled down with everything else.
twisti@1858	709	// That is, copy [sp, argslot) downward by -size words. In pseudo-code:
twisti@1858	710	// sp -= size;
twisti@1858	711	// for (temp = sp + size; temp < argslot; temp++)
twisti@1858	712	// temp[-size] = temp[0]
twisti@1858	713	// argslot -= size;
twisti@1858	714
never@2950	715	// offset is temp3_reg in case of arg_slots being a register.
never@2950	716	RegisterOrConstant offset = adjust_SP_and_Gargs_up_by_slots(_masm, arg_slots, temp3_reg, temp_reg);
never@2950	717	__ sub(Gargs, offset, temp_reg); // source pointer for copy
twisti@1858	718
twisti@1858	719	{
twisti@1858	720	Label loop;
twisti@2204	721	__ BIND(loop);
twisti@1858	722	// pull one word down each time through the loop
never@2950	723	__ ld_ptr( Address(temp_reg, 0 ), temp2_reg);
never@2950	724	__ st_ptr(temp2_reg, Address(temp_reg, offset) );
twisti@1858	725	__ add(temp_reg, wordSize, temp_reg);
kvn@3037	726	__ cmp_and_brx_short(temp_reg, argslot_reg, Assembler::lessUnsigned, Assembler::pt, loop);
twisti@1858	727	}
twisti@1858	728
twisti@1858	729	// Now move the argslot down, to point to the opened-up space.
twisti@1858	730	__ add(argslot_reg, offset, argslot_reg);
twisti@2204	731	BLOCK_COMMENT("} insert_arg_slots");
twisti@1858	732	}
twisti@1858	733
twisti@1858	734
twisti@1858	735	// Helper to remove argument slots from the stack.
never@2950	736	// arg_slots must be a multiple of stack_move_unit() and > 0
twisti@1858	737	void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
twisti@1858	738	RegisterOrConstant arg_slots,
twisti@1858	739	Register argslot_reg,
twisti@1858	740	Register temp_reg, Register temp2_reg, Register temp3_reg) {
never@2950	741	// allow constant zero
never@2950	742	if (arg_slots.is_constant() && arg_slots.as_constant() == 0)
never@2950	743	return;
twisti@1858	744	assert_different_registers(argslot_reg, temp_reg, temp2_reg, temp3_reg,
twisti@1858	745	(!arg_slots.is_register() ? Gargs : arg_slots.as_register()));
twisti@1858	746
never@2950	747	BLOCK_COMMENT("remove_arg_slots {");
never@2950	748	if (VerifyMethodHandles)
never@2950	749	verify_argslots(_masm, arg_slots, argslot_reg, temp_reg, temp2_reg, false,
never@2950	750	"deleted argument(s) must fall within current frame");
never@2950	751	if (VerifyMethodHandles)
never@2950	752	verify_stack_move(_masm, arg_slots, +1);
twisti@1858	753
twisti@1858	754	// Pull up everything shallower than argslot.
twisti@1858	755	// Then remove the excess space on the stack.
twisti@1858	756	// The stacked return address gets pulled up with everything else.
twisti@1858	757	// That is, copy [sp, argslot) upward by size words. In pseudo-code:
twisti@1858	758	// for (temp = argslot-1; temp >= sp; --temp)
twisti@1858	759	// temp[size] = temp[0]
twisti@1858	760	// argslot += size;
twisti@1858	761	// sp += size;
never@2950	762
never@2950	763	RegisterOrConstant offset = __ regcon_sll_ptr(arg_slots, LogBytesPerWord, temp3_reg);
twisti@1858	764	__ sub(argslot_reg, wordSize, temp_reg); // source pointer for copy
never@2950	765
twisti@1858	766	{
never@2950	767	Label L_loop;
never@2950	768	__ BIND(L_loop);
twisti@1858	769	// pull one word up each time through the loop
never@2950	770	__ ld_ptr( Address(temp_reg, 0 ), temp2_reg);
never@2950	771	__ st_ptr(temp2_reg, Address(temp_reg, offset) );
twisti@1858	772	__ sub(temp_reg, wordSize, temp_reg);
kvn@3037	773	__ cmp_and_brx_short(temp_reg, Gargs, Assembler::greaterEqualUnsigned, Assembler::pt, L_loop);
twisti@1858	774	}
twisti@1858	775
twisti@1858	776	// And adjust the argslot address to point at the deletion point.
twisti@1858	777	__ add(argslot_reg, offset, argslot_reg);
twisti@1858	778
never@2950	779	// We don't need the offset at this point anymore, just adjust SP and Gargs.
never@2950	780	(void) adjust_SP_and_Gargs_up_by_slots(_masm, arg_slots, temp3_reg, temp_reg);
never@2950	781
twisti@2204	782	BLOCK_COMMENT("} remove_arg_slots");
twisti@1858	783	}
twisti@1858	784
never@2950	785	// Helper to copy argument slots to the top of the stack.
never@2950	786	// The sequence starts with argslot_reg and is counted by slot_count
never@2950	787	// slot_count must be a multiple of stack_move_unit() and >= 0
never@2950	788	// This function blows the temps but does not change argslot_reg.
never@2950	789	void MethodHandles::push_arg_slots(MacroAssembler* _masm,
never@2950	790	Register argslot_reg,
never@2950	791	RegisterOrConstant slot_count,
never@2950	792	Register temp_reg, Register temp2_reg) {
never@2950	793	// allow constant zero
never@2950	794	if (slot_count.is_constant() && slot_count.as_constant() == 0)
never@2950	795	return;
never@2950	796	assert_different_registers(argslot_reg, temp_reg, temp2_reg,
never@2950	797	(!slot_count.is_register() ? Gargs : slot_count.as_register()),
never@2950	798	SP);
never@2950	799	assert(Interpreter::stackElementSize == wordSize, "else change this code");
never@2950	800
never@2950	801	BLOCK_COMMENT("push_arg_slots {");
never@2950	802	if (VerifyMethodHandles)
never@2950	803	verify_stack_move(_masm, slot_count, 0);
never@2950	804
never@2950	805	RegisterOrConstant offset = adjust_SP_and_Gargs_down_by_slots(_masm, slot_count, temp2_reg, temp_reg);
never@2950	806
never@2950	807	if (slot_count.is_constant()) {
never@2950	808	for (int i = slot_count.as_constant() - 1; i >= 0; i--) {
never@2950	809	__ ld_ptr( Address(argslot_reg, i * wordSize), temp_reg);
never@2950	810	__ st_ptr(temp_reg, Address(Gargs, i * wordSize));
never@2950	811	}
never@2950	812	} else {
never@2950	813	Label L_plural, L_loop, L_break;
never@2950	814	// Emit code to dynamically check for the common cases, zero and one slot.
never@2950	815	__ cmp(slot_count.as_register(), (int32_t) 1);
never@2950	816	__ br(Assembler::greater, false, Assembler::pn, L_plural);
never@2950	817	__ delayed()->nop();
never@2950	818	__ br(Assembler::less, false, Assembler::pn, L_break);
never@2950	819	__ delayed()->nop();
never@2950	820	__ ld_ptr( Address(argslot_reg, 0), temp_reg);
never@2950	821	__ st_ptr(temp_reg, Address(Gargs, 0));
kvn@3037	822	__ ba_short(L_break);
never@2950	823	__ BIND(L_plural);
never@2950	824
never@2950	825	// Loop for 2 or more:
never@2950	826	// top = &argslot[slot_count]
never@2950	827	// while (top > argslot) *(--Gargs) = *(--top)
never@2950	828	Register top_reg = temp_reg;
never@2950	829	__ add(argslot_reg, offset, top_reg);
never@2950	830	__ add(Gargs, offset, Gargs ); // move back up again so we can go down
never@2950	831	__ BIND(L_loop);
never@2950	832	__ sub(top_reg, wordSize, top_reg);
never@2950	833	__ sub(Gargs, wordSize, Gargs );
never@2950	834	__ ld_ptr( Address(top_reg, 0), temp2_reg);
never@2950	835	__ st_ptr(temp2_reg, Address(Gargs, 0));
kvn@3037	836	__ cmp_and_brx_short(top_reg, argslot_reg, Assembler::greaterUnsigned, Assembler::pt, L_loop);
never@2950	837	__ BIND(L_break);
never@2950	838	}
never@2950	839	BLOCK_COMMENT("} push_arg_slots");
never@2950	840	}
never@2950	841
never@2950	842	// in-place movement; no change to Gargs
never@2950	843	// blows temp_reg, temp2_reg
never@2950	844	void MethodHandles::move_arg_slots_up(MacroAssembler* _masm,
never@2950	845	Register bottom_reg, // invariant
never@2950	846	Address top_addr, // can use temp_reg
never@2950	847	RegisterOrConstant positive_distance_in_slots, // destroyed if register
never@2950	848	Register temp_reg, Register temp2_reg) {
never@2950	849	assert_different_registers(bottom_reg,
never@2950	850	temp_reg, temp2_reg,
never@2950	851	positive_distance_in_slots.register_or_noreg());
never@2950	852	BLOCK_COMMENT("move_arg_slots_up {");
never@2950	853	Label L_loop, L_break;
never@2950	854	Register top_reg = temp_reg;
never@2950	855	if (!top_addr.is_same_address(Address(top_reg, 0))) {
never@2950	856	__ add(top_addr, top_reg);
never@2950	857	}
never@2950	858	// Detect empty (or broken) loop:
never@2950	859	#ifdef ASSERT
never@2950	860	if (VerifyMethodHandles) {
never@2950	861	// Verify that &bottom < &top (non-empty interval)
never@2950	862	Label L_ok, L_bad;
never@2950	863	if (positive_distance_in_slots.is_register()) {
never@2950	864	__ cmp(positive_distance_in_slots.as_register(), (int32_t) 0);
never@2950	865	__ br(Assembler::lessEqual, false, Assembler::pn, L_bad);
never@2950	866	__ delayed()->nop();
never@2950	867	}
kvn@3037	868	__ cmp_and_brx_short(bottom_reg, top_reg, Assembler::lessUnsigned, Assembler::pt, L_ok);
never@2950	869	__ BIND(L_bad);
never@2950	870	__ stop("valid bounds (copy up)");
never@2950	871	__ BIND(L_ok);
never@2950	872	}
never@2950	873	#endif
kvn@3037	874	__ cmp_and_brx_short(bottom_reg, top_reg, Assembler::greaterEqualUnsigned, Assembler::pn, L_break);
never@2950	875	// work top down to bottom, copying contiguous data upwards
never@2950	876	// In pseudo-code:
never@2950	877	// while (--top >= bottom) *(top + distance) = *(top + 0);
never@2950	878	RegisterOrConstant offset = __ argument_offset(positive_distance_in_slots, positive_distance_in_slots.register_or_noreg());
never@2950	879	__ BIND(L_loop);
never@2950	880	__ sub(top_reg, wordSize, top_reg);
never@2950	881	__ ld_ptr( Address(top_reg, 0 ), temp2_reg);
never@2950	882	__ st_ptr(temp2_reg, Address(top_reg, offset) );
kvn@3037	883	__ cmp_and_brx_short(top_reg, bottom_reg, Assembler::greaterUnsigned, Assembler::pt, L_loop);
never@2950	884	assert(Interpreter::stackElementSize == wordSize, "else change loop");
never@2950	885	__ BIND(L_break);
never@2950	886	BLOCK_COMMENT("} move_arg_slots_up");
never@2950	887	}
never@2950	888
never@2950	889	// in-place movement; no change to rsp
never@2950	890	// blows temp_reg, temp2_reg
never@2950	891	void MethodHandles::move_arg_slots_down(MacroAssembler* _masm,
never@2950	892	Address bottom_addr, // can use temp_reg
never@2950	893	Register top_reg, // invariant
never@2950	894	RegisterOrConstant negative_distance_in_slots, // destroyed if register
never@2950	895	Register temp_reg, Register temp2_reg) {
never@2950	896	assert_different_registers(top_reg,
never@2950	897	negative_distance_in_slots.register_or_noreg(),
never@2950	898	temp_reg, temp2_reg);
never@2950	899	BLOCK_COMMENT("move_arg_slots_down {");
never@2950	900	Label L_loop, L_break;
never@2950	901	Register bottom_reg = temp_reg;
never@2950	902	if (!bottom_addr.is_same_address(Address(bottom_reg, 0))) {
never@2950	903	__ add(bottom_addr, bottom_reg);
never@2950	904	}
never@2950	905	// Detect empty (or broken) loop:
never@2950	906	#ifdef ASSERT
never@2950	907	assert(!negative_distance_in_slots.is_constant() || negative_distance_in_slots.as_constant() < 0, "");
never@2950	908	if (VerifyMethodHandles) {
never@2950	909	// Verify that &bottom < &top (non-empty interval)
never@2950	910	Label L_ok, L_bad;
never@2950	911	if (negative_distance_in_slots.is_register()) {
never@2950	912	__ cmp(negative_distance_in_slots.as_register(), (int32_t) 0);
never@2950	913	__ br(Assembler::greaterEqual, false, Assembler::pn, L_bad);
never@2950	914	__ delayed()->nop();
never@2950	915	}
kvn@3037	916	__ cmp_and_brx_short(bottom_reg, top_reg, Assembler::lessUnsigned, Assembler::pt, L_ok);
never@2950	917	__ BIND(L_bad);
never@2950	918	__ stop("valid bounds (copy down)");
never@2950	919	__ BIND(L_ok);
never@2950	920	}
never@2950	921	#endif
kvn@3037	922	__ cmp_and_brx_short(bottom_reg, top_reg, Assembler::greaterEqualUnsigned, Assembler::pn, L_break);
never@2950	923	// work bottom up to top, copying contiguous data downwards
never@2950	924	// In pseudo-code:
never@2950	925	// while (bottom < top) *(bottom - distance) = *(bottom + 0), bottom++;
never@2950	926	RegisterOrConstant offset = __ argument_offset(negative_distance_in_slots, negative_distance_in_slots.register_or_noreg());
never@2950	927	__ BIND(L_loop);
never@2950	928	__ ld_ptr( Address(bottom_reg, 0 ), temp2_reg);
never@2950	929	__ st_ptr(temp2_reg, Address(bottom_reg, offset) );
never@2950	930	__ add(bottom_reg, wordSize, bottom_reg);
kvn@3037	931	__ cmp_and_brx_short(bottom_reg, top_reg, Assembler::lessUnsigned, Assembler::pt, L_loop);
never@2950	932	assert(Interpreter::stackElementSize == wordSize, "else change loop");
never@2950	933	__ BIND(L_break);
never@2950	934	BLOCK_COMMENT("} move_arg_slots_down");
never@2950	935	}
never@2950	936
never@2950	937	// Copy from a field or array element to a stacked argument slot.
never@2950	938	// is_element (ignored) says whether caller is loading an array element instead of an instance field.
never@2950	939	void MethodHandles::move_typed_arg(MacroAssembler* _masm,
never@2950	940	BasicType type, bool is_element,
never@2950	941	Address value_src, Address slot_dest,
never@2950	942	Register temp_reg) {
never@2950	943	assert(!slot_dest.uses(temp_reg), "must be different register");
never@2950	944	BLOCK_COMMENT(!is_element ? "move_typed_arg {" : "move_typed_arg { (array element)");
never@2950	945	if (type == T_OBJECT || type == T_ARRAY) {
never@2950	946	__ load_heap_oop(value_src, temp_reg);
never@2950	947	__ verify_oop(temp_reg);
never@2950	948	__ st_ptr(temp_reg, slot_dest);
never@2950	949	} else if (type != T_VOID) {
never@2950	950	int arg_size = type2aelembytes(type);
never@2950	951	bool arg_is_signed = is_signed_subword_type(type);
never@2950	952	int slot_size = is_subword_type(type) ? type2aelembytes(T_INT) : arg_size; // store int sub-words as int
never@2950	953	__ load_sized_value( value_src, temp_reg, arg_size, arg_is_signed);
never@2950	954	__ store_sized_value(temp_reg, slot_dest, slot_size );
never@2950	955	}
never@2950	956	BLOCK_COMMENT("} move_typed_arg");
never@2950	957	}
never@2950	958
never@2950	959	// Cf. TemplateInterpreterGenerator::generate_return_entry_for and
never@2950	960	// InterpreterMacroAssembler::save_return_value
never@2950	961	void MethodHandles::move_return_value(MacroAssembler* _masm, BasicType type,
never@2950	962	Address return_slot) {
never@2950	963	BLOCK_COMMENT("move_return_value {");
never@2950	964	// Look at the type and pull the value out of the corresponding register.
never@2950	965	if (type == T_VOID) {
never@2950	966	// nothing to do
never@2950	967	} else if (type == T_OBJECT) {
never@2950	968	__ verify_oop(O0);
never@2950	969	__ st_ptr(O0, return_slot);
never@2950	970	} else if (type == T_INT || is_subword_type(type)) {
never@2950	971	int type_size = type2aelembytes(T_INT);
never@2950	972	__ store_sized_value(O0, return_slot, type_size);
never@2950	973	} else if (type == T_LONG) {
never@2950	974	// store the value by parts
never@2950	975	// Note: We assume longs are continguous (if misaligned) on the interpreter stack.
never@2950	976	#if !defined(_LP64) && defined(COMPILER2)
never@2950	977	__ stx(G1, return_slot);
never@2950	978	#else
never@2950	979	#ifdef _LP64
never@2950	980	__ stx(O0, return_slot);
never@2950	981	#else
never@2950	982	if (return_slot.has_disp()) {
never@2950	983	// The displacement is a constant
never@2950	984	__ st(O0, return_slot);
never@2950	985	__ st(O1, return_slot.plus_disp(Interpreter::stackElementSize));
never@2950	986	} else {
never@2950	987	__ std(O0, return_slot);
never@2950	988	}
never@2950	989	#endif
never@2950	990	#endif
never@2950	991	} else if (type == T_FLOAT) {
never@2950	992	__ stf(FloatRegisterImpl::S, Ftos_f, return_slot);
never@2950	993	} else if (type == T_DOUBLE) {
never@2950	994	__ stf(FloatRegisterImpl::D, Ftos_f, return_slot);
never@2950	995	} else {
never@2950	996	ShouldNotReachHere();
never@2950	997	}
never@2950	998	BLOCK_COMMENT("} move_return_value");
never@2950	999	}
twisti@1858	1000
twisti@1858	1001	#ifndef PRODUCT
twisti@1858	1002	extern "C" void print_method_handle(oop mh);
twisti@1858	1003	void trace_method_handle_stub(const char* adaptername,
never@2868	1004	oopDesc* mh,
never@2868	1005	intptr_t* saved_sp) {
never@2950	1006	bool has_mh = (strstr(adaptername, "return/") == NULL); // return adapters don't have mh
never@2868	1007	tty->print_cr("MH %s mh="INTPTR_FORMAT " saved_sp=" INTPTR_FORMAT, adaptername, (intptr_t) mh, saved_sp);
never@2950	1008	if (has_mh)
never@2950	1009	print_method_handle(mh);
twisti@1858	1010	}
twisti@2204	1011	void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) {
twisti@2204	1012	if (!TraceMethodHandles) return;
twisti@2204	1013	BLOCK_COMMENT("trace_method_handle {");
twisti@2204	1014	// save: Gargs, O5_savedSP
twisti@2204	1015	__ save_frame(16);
twisti@2204	1016	__ set((intptr_t) adaptername, O0);
twisti@2204	1017	__ mov(G3_method_handle, O1);
never@2868	1018	__ mov(I5_savedSP, O2);
twisti@2204	1019	__ mov(G3_method_handle, L3);
twisti@2204	1020	__ mov(Gargs, L4);
twisti@2204	1021	__ mov(G5_method_type, L5);
twisti@2204	1022	__ call_VM_leaf(L7, CAST_FROM_FN_PTR(address, trace_method_handle_stub));
twisti@2204	1023
twisti@2204	1024	__ mov(L3, G3_method_handle);
twisti@2204	1025	__ mov(L4, Gargs);
twisti@2204	1026	__ mov(L5, G5_method_type);
twisti@2204	1027	__ restore();
twisti@2204	1028	BLOCK_COMMENT("} trace_method_handle");
twisti@2204	1029	}
twisti@1858	1030	#endif // PRODUCT
twisti@1858	1031
jrose@1862	1032	// which conversion op types are implemented here?
jrose@1862	1033	int MethodHandles::adapter_conversion_ops_supported_mask() {
jrose@2639	1034	return ((1<<java_lang_invoke_AdapterMethodHandle::OP_RETYPE_ONLY)
jrose@2639	1035	|(1<<java_lang_invoke_AdapterMethodHandle::OP_RETYPE_RAW)
jrose@2639	1036	|(1<<java_lang_invoke_AdapterMethodHandle::OP_CHECK_CAST)
jrose@2639	1037	|(1<<java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_PRIM)
jrose@2639	1038	|(1<<java_lang_invoke_AdapterMethodHandle::OP_REF_TO_PRIM)
never@2950	1039	// OP_PRIM_TO_REF is below...
jrose@2639	1040	|(1<<java_lang_invoke_AdapterMethodHandle::OP_SWAP_ARGS)
jrose@2639	1041	|(1<<java_lang_invoke_AdapterMethodHandle::OP_ROT_ARGS)
jrose@2639	1042	|(1<<java_lang_invoke_AdapterMethodHandle::OP_DUP_ARGS)
jrose@2639	1043	|(1<<java_lang_invoke_AdapterMethodHandle::OP_DROP_ARGS)
never@2950	1044	// OP_COLLECT_ARGS is below...
never@2950	1045	|(1<<java_lang_invoke_AdapterMethodHandle::OP_SPREAD_ARGS)
never@2950	1046	|(!UseRicochetFrames ? 0 :
never@2950	1047	java_lang_invoke_MethodTypeForm::vmlayout_offset_in_bytes() <= 0 ? 0 :
never@2950	1048	((1<<java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF)
never@2950	1049	|(1<<java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS)
never@2950	1050	|(1<<java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS)
never@2950	1051	)
never@2950	1052	)
jrose@1862	1053	);
jrose@1862	1054	}
twisti@1858	1055
twisti@1858	1056	//------------------------------------------------------------------------------
twisti@1858	1057	// MethodHandles::generate_method_handle_stub
twisti@1858	1058	//
jrose@1145	1059	// Generate an "entry" field for a method handle.
jrose@1145	1060	// This determines how the method handle will respond to calls.
twisti@2436	1061	void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
never@2950	1062	MethodHandles::EntryKind ek_orig = ek_original_kind(ek);
never@2950	1063
twisti@1858	1064	// Here is the register state during an interpreted call,
twisti@1858	1065	// as set up by generate_method_handle_interpreter_entry():
twisti@1858	1066	// - G5: garbage temp (was MethodHandle.invoke methodOop, unused)
twisti@1858	1067	// - G3: receiver method handle
twisti@1858	1068	// - O5_savedSP: sender SP (must preserve)
twisti@1858	1069
never@2950	1070	const Register O0_scratch = O0;
twisti@2411	1071	const Register O1_scratch = O1;
twisti@2411	1072	const Register O2_scratch = O2;
twisti@2411	1073	const Register O3_scratch = O3;
never@2950	1074	const Register O4_scratch = O4;
never@2950	1075	const Register G5_scratch = G5;
twisti@2411	1076
never@2950	1077	// Often used names:
never@2950	1078	const Register O0_argslot = O0;
never@2950	1079
never@2950	1080	// Argument registers for _raise_exception:
twisti@2411	1081	const Register O0_code = O0;
twisti@2411	1082	const Register O1_actual = O1;
twisti@2411	1083	const Register O2_required = O2;
twisti@1858	1084
jrose@2639	1085	guarantee(java_lang_invoke_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
twisti@1858	1086
twisti@1858	1087	// Some handy addresses:
jrose@2639	1088	Address G3_mh_vmtarget( G3_method_handle, java_lang_invoke_MethodHandle::vmtarget_offset_in_bytes());
twisti@1858	1089
jrose@2639	1090	Address G3_dmh_vmindex( G3_method_handle, java_lang_invoke_DirectMethodHandle::vmindex_offset_in_bytes());
twisti@1858	1091
jrose@2639	1092	Address G3_bmh_vmargslot( G3_method_handle, java_lang_invoke_BoundMethodHandle::vmargslot_offset_in_bytes());
jrose@2639	1093	Address G3_bmh_argument( G3_method_handle, java_lang_invoke_BoundMethodHandle::argument_offset_in_bytes());
twisti@1858	1094
jrose@2639	1095	Address G3_amh_vmargslot( G3_method_handle, java_lang_invoke_AdapterMethodHandle::vmargslot_offset_in_bytes());
jrose@2639	1096	Address G3_amh_argument ( G3_method_handle, java_lang_invoke_AdapterMethodHandle::argument_offset_in_bytes());
jrose@2639	1097	Address G3_amh_conversion(G3_method_handle, java_lang_invoke_AdapterMethodHandle::conversion_offset_in_bytes());
twisti@1858	1098
twisti@1858	1099	const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
twisti@1858	1100
twisti@1858	1101	if (have_entry(ek)) {
twisti@1858	1102	__ nop(); // empty stubs make SG sick
twisti@1858	1103	return;
twisti@1858	1104	}
twisti@1858	1105
twisti@1858	1106	address interp_entry = __ pc();
twisti@1858	1107
twisti@2204	1108	trace_method_handle(_masm, entry_name(ek));
twisti@1858	1109
never@2950	1110	BLOCK_COMMENT(err_msg("Entry %s {", entry_name(ek)));
never@2950	1111
twisti@1858	1112	switch ((int) ek) {
twisti@1858	1113	case _raise_exception:
twisti@1858	1114	{
twisti@1858	1115	// Not a real MH entry, but rather shared code for raising an
never@3005	1116	// exception. For sharing purposes the arguments are passed into registers
never@3005	1117	// and then placed in the intepreter calling convention here.
twisti@2436	1118	assert(raise_exception_method(), "must be set");
twisti@2603	1119	assert(raise_exception_method()->from_compiled_entry(), "method must be linked");
twisti@1858	1120
twisti@1858	1121	__ set(AddressLiteral((address) &_raise_exception_method), G5_method);
twisti@1858	1122	__ ld_ptr(Address(G5_method, 0), G5_method);
twisti@1858	1123
twisti@2411	1124	const int jobject_oop_offset = 0;
twisti@1858	1125	__ ld_ptr(Address(G5_method, jobject_oop_offset), G5_method);
twisti@1858	1126
never@3005	1127	adjust_SP_and_Gargs_down_by_slots(_masm, 3, noreg, noreg);
never@3005	1128
never@3005	1129	__ st_ptr(O0_code, __ argument_address(constant(2), noreg, 0));
never@3005	1130	__ st_ptr(O1_actual, __ argument_address(constant(1), noreg, 0));
never@3005	1131	__ st_ptr(O2_required, __ argument_address(constant(0), noreg, 0));
never@3005	1132	jump_from_method_handle(_masm, G5_method, O1_scratch, O2_scratch);
twisti@1858	1133	}
twisti@1858	1134	break;
twisti@1858	1135
twisti@1858	1136	case _invokestatic_mh:
twisti@1858	1137	case _invokespecial_mh:
twisti@1858	1138	{
twisti@2201	1139	__ load_heap_oop(G3_mh_vmtarget, G5_method); // target is a methodOop
twisti@1858	1140	// Same as TemplateTable::invokestatic or invokespecial,
twisti@1858	1141	// minus the CP setup and profiling:
twisti@1858	1142	if (ek == _invokespecial_mh) {
twisti@1858	1143	// Must load & check the first argument before entering the target method.
twisti@1858	1144	__ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
never@2950	1145	__ ld_ptr(__ argument_address(O0_argslot, O0_argslot, -1), G3_method_handle);
twisti@1858	1146	__ null_check(G3_method_handle);
twisti@1858	1147	__ verify_oop(G3_method_handle);
twisti@1858	1148	}
never@3005	1149	jump_from_method_handle(_masm, G5_method, O1_scratch, O2_scratch);
twisti@1858	1150	}
twisti@1858	1151	break;
twisti@1858	1152
twisti@1858	1153	case _invokevirtual_mh:
twisti@1858	1154	{
twisti@1858	1155	// Same as TemplateTable::invokevirtual,
twisti@1858	1156	// minus the CP setup and profiling:
twisti@1858	1157
twisti@1858	1158	// Pick out the vtable index and receiver offset from the MH,
twisti@1858	1159	// and then we can discard it:
never@2950	1160	Register O2_index = O2_scratch;
twisti@1858	1161	__ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
never@2950	1162	__ ldsw(G3_dmh_vmindex, O2_index);
twisti@1858	1163	// Note: The verifier allows us to ignore G3_mh_vmtarget.
never@2950	1164	__ ld_ptr(__ argument_address(O0_argslot, O0_argslot, -1), G3_method_handle);
twisti@1858	1165	__ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
twisti@1858	1166
twisti@1858	1167	// Get receiver klass:
twisti@1858	1168	Register O0_klass = O0_argslot;
twisti@1858	1169	__ load_klass(G3_method_handle, O0_klass);
twisti@1858	1170	__ verify_oop(O0_klass);
twisti@1858	1171
twisti@1858	1172	// Get target methodOop & entry point:
twisti@1858	1173	const int base = instanceKlass::vtable_start_offset() * wordSize;
twisti@1858	1174	assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
twisti@1858	1175
never@2950	1176	__ sll_ptr(O2_index, LogBytesPerWord, O2_index);
never@2950	1177	__ add(O0_klass, O2_index, O0_klass);
twisti@1858	1178	Address vtable_entry_addr(O0_klass, base + vtableEntry::method_offset_in_bytes());
twisti@1858	1179	__ ld_ptr(vtable_entry_addr, G5_method);
twisti@1858	1180
never@3005	1181	jump_from_method_handle(_masm, G5_method, O1_scratch, O2_scratch);
twisti@1858	1182	}
twisti@1858	1183	break;
twisti@1858	1184
twisti@1858	1185	case _invokeinterface_mh:
twisti@1858	1186	{
twisti@1858	1187	// Same as TemplateTable::invokeinterface,
twisti@1858	1188	// minus the CP setup and profiling:
twisti@1858	1189	__ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
twisti@1858	1190	Register O1_intf = O1_scratch;
never@2950	1191	Register G5_index = G5_scratch;
twisti@2201	1192	__ load_heap_oop(G3_mh_vmtarget, O1_intf);
twisti@1858	1193	__ ldsw(G3_dmh_vmindex, G5_index);
never@2950	1194	__ ld_ptr(__ argument_address(O0_argslot, O0_argslot, -1), G3_method_handle);
twisti@1858	1195	__ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
twisti@1858	1196
twisti@1858	1197	// Get receiver klass:
twisti@1858	1198	Register O0_klass = O0_argslot;
twisti@1858	1199	__ load_klass(G3_method_handle, O0_klass);
twisti@1858	1200	__ verify_oop(O0_klass);
twisti@1858	1201
twisti@1858	1202	// Get interface:
twisti@1858	1203	Label no_such_interface;
twisti@1858	1204	__ verify_oop(O1_intf);
twisti@1858	1205	__ lookup_interface_method(O0_klass, O1_intf,
twisti@1858	1206	// Note: next two args must be the same:
twisti@1858	1207	G5_index, G5_method,
twisti@1858	1208	O2_scratch,
twisti@1858	1209	O3_scratch,
twisti@1858	1210	no_such_interface);
twisti@1858	1211
never@3005	1212	jump_from_method_handle(_masm, G5_method, O1_scratch, O2_scratch);
twisti@1858	1213
twisti@1858	1214	__ bind(no_such_interface);
twisti@1858	1215	// Throw an exception.
twisti@1858	1216	// For historical reasons, it will be IncompatibleClassChangeError.
twisti@1858	1217	__ unimplemented("not tested yet");
twisti@2411	1218	__ ld_ptr(Address(O1_intf, java_mirror_offset), O2_required); // required interface
twisti@2411	1219	__ mov( O0_klass, O1_actual); // bad receiver
twisti@2411	1220	__ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O3_scratch);
twisti@2411	1221	__ delayed()->mov(Bytecodes::_invokeinterface, O0_code); // who is complaining?
twisti@1858	1222	}
twisti@1858	1223	break;
twisti@1858	1224
twisti@1858	1225	case _bound_ref_mh:
twisti@1858	1226	case _bound_int_mh:
twisti@1858	1227	case _bound_long_mh:
twisti@1858	1228	case _bound_ref_direct_mh:
twisti@1858	1229	case _bound_int_direct_mh:
twisti@1858	1230	case _bound_long_direct_mh:
twisti@1858	1231	{
twisti@1858	1232	const bool direct_to_method = (ek >= _bound_ref_direct_mh);
never@2950	1233	BasicType arg_type = ek_bound_mh_arg_type(ek);
never@2950	1234	int arg_slots = type2size[arg_type];
twisti@1858	1235
twisti@1858	1236	// Make room for the new argument:
never@2950	1237	load_vmargslot(_masm, G3_bmh_vmargslot, O0_argslot);
never@2950	1238	__ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
twisti@1858	1239
never@2950	1240	insert_arg_slots(_masm, arg_slots * stack_move_unit(), O0_argslot, O1_scratch, O2_scratch, O3_scratch);
twisti@1858	1241
twisti@1858	1242	// Store bound argument into the new stack slot:
twisti@2201	1243	__ load_heap_oop(G3_bmh_argument, O1_scratch);
twisti@1858	1244	if (arg_type == T_OBJECT) {
twisti@1858	1245	__ st_ptr(O1_scratch, Address(O0_argslot, 0));
twisti@1858	1246	} else {
twisti@1858	1247	Address prim_value_addr(O1_scratch, java_lang_boxing_object::value_offset_in_bytes(arg_type));
never@2950	1248	move_typed_arg(_masm, arg_type, false,
never@2950	1249	prim_value_addr,
never@2950	1250	Address(O0_argslot, 0),
never@2950	1251	O2_scratch); // must be an even register for !_LP64 long moves (uses O2/O3)
twisti@1858	1252	}
twisti@1858	1253
twisti@1858	1254	if (direct_to_method) {
twisti@2201	1255	__ load_heap_oop(G3_mh_vmtarget, G5_method); // target is a methodOop
never@3005	1256	jump_from_method_handle(_masm, G5_method, O1_scratch, O2_scratch);
twisti@1858	1257	} else {
twisti@2201	1258	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle); // target is a methodOop
twisti@1858	1259	__ verify_oop(G3_method_handle);
twisti@1858	1260	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	1261	}
twisti@1858	1262	}
twisti@1858	1263	break;
twisti@1858	1264
twisti@1858	1265	case _adapter_retype_only:
twisti@1858	1266	case _adapter_retype_raw:
twisti@1858	1267	// Immediately jump to the next MH layer:
twisti@2201	1268	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
never@2950	1269	__ verify_oop(G3_method_handle);
twisti@1858	1270	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	1271	// This is OK when all parameter types widen.
twisti@1858	1272	// It is also OK when a return type narrows.
twisti@1858	1273	break;
twisti@1858	1274
twisti@1858	1275	case _adapter_check_cast:
twisti@1858	1276	{
twisti@1858	1277	// Check a reference argument before jumping to the next layer of MH:
never@2950	1278	load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
never@2950	1279	Address vmarg = __ argument_address(O0_argslot, O0_argslot);
twisti@1858	1280
twisti@1858	1281	// What class are we casting to?
never@2950	1282	Register O1_klass = O1_scratch; // Interesting AMH data.
never@2950	1283	__ load_heap_oop(G3_amh_argument, O1_klass); // This is a Class object!
never@2950	1284	load_klass_from_Class(_masm, O1_klass, O2_scratch, O3_scratch);
twisti@1858	1285
never@2950	1286	Label L_done;
never@2950	1287	__ ld_ptr(vmarg, O2_scratch);
kvn@3037	1288	__ br_null_short(O2_scratch, Assembler::pn, L_done); // No cast if null.
never@2950	1289	__ load_klass(O2_scratch, O2_scratch);
twisti@1858	1290
twisti@1858	1291	// Live at this point:
twisti@2874	1292	// - O0_argslot : argslot index in vmarg; may be required in the failing path
never@2950	1293	// - O1_klass : klass required by the target method
never@2950	1294	// - O2_scratch : argument klass to test
twisti@1858	1295	// - G3_method_handle: adapter method handle
never@2950	1296	__ check_klass_subtype(O2_scratch, O1_klass, O3_scratch, O4_scratch, L_done);
twisti@1858	1297
twisti@1858	1298	// If we get here, the type check failed!
twisti@2411	1299	__ load_heap_oop(G3_amh_argument, O2_required); // required class
twisti@2411	1300	__ ld_ptr( vmarg, O1_actual); // bad object
twisti@2411	1301	__ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O3_scratch);
twisti@2411	1302	__ delayed()->mov(Bytecodes::_checkcast, O0_code); // who is complaining?
twisti@1858	1303
never@2950	1304	__ BIND(L_done);
twisti@1858	1305	// Get the new MH:
twisti@2201	1306	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858	1307	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	1308	}
twisti@1858	1309	break;
twisti@1858	1310
twisti@1858	1311	case _adapter_prim_to_prim:
twisti@1858	1312	case _adapter_ref_to_prim:
twisti@1858	1313	// Handled completely by optimized cases.
twisti@1858	1314	__ stop("init_AdapterMethodHandle should not issue this");
twisti@1858	1315	break;
twisti@1858	1316
twisti@1858	1317	case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
twisti@1858	1318	//case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
twisti@1858	1319	case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
twisti@1858	1320	case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
twisti@1858	1321	{
twisti@1858	1322	// Perform an in-place conversion to int or an int subword.
never@2950	1323	load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
twisti@2351	1324	Address value;
never@2950	1325	Address vmarg;
twisti@1858	1326	bool value_left_justified = false;
twisti@1858	1327
twisti@1858	1328	switch (ek) {
twisti@1858	1329	case _adapter_opt_i2i:
never@2950	1330	value = vmarg = __ argument_address(O0_argslot, O0_argslot);
twisti@2256	1331	break;
twisti@1858	1332	case _adapter_opt_l2i:
twisti@2256	1333	{
twisti@2256	1334	// just delete the extra slot
twisti@2351	1335	#ifdef _LP64
twisti@2351	1336	// In V9, longs are given 2 64-bit slots in the interpreter, but the
twisti@2351	1337	// data is passed in only 1 slot.
twisti@2351	1338	// Keep the second slot.
never@2950	1339	__ add(__ argument_address(O0_argslot, O0_argslot, -1), O0_argslot);
twisti@2351	1340	remove_arg_slots(_masm, -stack_move_unit(), O0_argslot, O1_scratch, O2_scratch, O3_scratch);
twisti@2351	1341	value = Address(O0_argslot, 4); // Get least-significant 32-bit of 64-bit value.
twisti@2351	1342	vmarg = Address(O0_argslot, Interpreter::stackElementSize);
twisti@2351	1343	#else
twisti@2351	1344	// Keep the first slot.
never@2950	1345	__ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
twisti@2256	1346	remove_arg_slots(_masm, -stack_move_unit(), O0_argslot, O1_scratch, O2_scratch, O3_scratch);
twisti@2351	1347	value = Address(O0_argslot, 0);
twisti@2351	1348	vmarg = value;
twisti@2351	1349	#endif
twisti@2256	1350	}
twisti@1858	1351	break;
twisti@1858	1352	case _adapter_opt_unboxi:
twisti@1858	1353	{
never@2950	1354	vmarg = __ argument_address(O0_argslot, O0_argslot);
twisti@1858	1355	// Load the value up from the heap.
twisti@1858	1356	__ ld_ptr(vmarg, O1_scratch);
twisti@1858	1357	int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
twisti@1858	1358	#ifdef ASSERT
twisti@1858	1359	for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
twisti@1858	1360	if (is_subword_type(BasicType(bt)))
twisti@1858	1361	assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
twisti@1858	1362	}
twisti@1858	1363	#endif
twisti@1858	1364	__ null_check(O1_scratch, value_offset);
twisti@1858	1365	value = Address(O1_scratch, value_offset);
twisti@1858	1366	#ifdef _BIG_ENDIAN
twisti@1858	1367	// Values stored in objects are packed.
twisti@1858	1368	value_left_justified = true;
twisti@1858	1369	#endif
twisti@1858	1370	}
twisti@1858	1371	break;
twisti@1858	1372	default:
twisti@1858	1373	ShouldNotReachHere();
twisti@1858	1374	}
twisti@1858	1375
twisti@1858	1376	// This check is required on _BIG_ENDIAN
never@2950	1377	Register G5_vminfo = G5_scratch;
twisti@1858	1378	__ ldsw(G3_amh_conversion, G5_vminfo);
twisti@1858	1379	assert(CONV_VMINFO_SHIFT == 0, "preshifted");
twisti@1858	1380
twisti@1858	1381	// Original 32-bit vmdata word must be of this form:
twisti@1858	1382	// | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
twisti@1858	1383	__ lduw(value, O1_scratch);
twisti@1858	1384	if (!value_left_justified)
twisti@1858	1385	__ sll(O1_scratch, G5_vminfo, O1_scratch);
twisti@1858	1386	Label zero_extend, done;
twisti@1858	1387	__ btst(CONV_VMINFO_SIGN_FLAG, G5_vminfo);
twisti@1858	1388	__ br(Assembler::zero, false, Assembler::pn, zero_extend);
twisti@1858	1389	__ delayed()->nop();
twisti@1858	1390
twisti@1858	1391	// this path is taken for int->byte, int->short
twisti@1858	1392	__ sra(O1_scratch, G5_vminfo, O1_scratch);
kvn@3037	1393	__ ba_short(done);
twisti@1858	1394
twisti@1858	1395	__ bind(zero_extend);
twisti@1858	1396	// this is taken for int->char
twisti@1858	1397	__ srl(O1_scratch, G5_vminfo, O1_scratch);
twisti@1858	1398
twisti@1858	1399	__ bind(done);
twisti@1858	1400	__ st(O1_scratch, vmarg);
twisti@1858	1401
twisti@1858	1402	// Get the new MH:
twisti@2201	1403	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858	1404	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	1405	}
twisti@1858	1406	break;
twisti@1858	1407
twisti@1858	1408	case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
twisti@1858	1409	case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
twisti@1858	1410	{
twisti@1858	1411	// Perform an in-place int-to-long or ref-to-long conversion.
never@2950	1412	load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
twisti@1858	1413
twisti@1858	1414	// On big-endian machine we duplicate the slot and store the MSW
twisti@1858	1415	// in the first slot.
never@2950	1416	__ add(__ argument_address(O0_argslot, O0_argslot, 1), O0_argslot);
twisti@1858	1417
never@2950	1418	insert_arg_slots(_masm, stack_move_unit(), O0_argslot, O1_scratch, O2_scratch, O3_scratch);
twisti@1858	1419
twisti@1858	1420	Address arg_lsw(O0_argslot, 0);
twisti@1861	1421	Address arg_msw(O0_argslot, -Interpreter::stackElementSize);
twisti@1858	1422
twisti@1858	1423	switch (ek) {
twisti@1858	1424	case _adapter_opt_i2l:
twisti@1858	1425	{
twisti@2664	1426	#ifdef _LP64
twisti@2664	1427	__ ldsw(arg_lsw, O2_scratch); // Load LSW sign-extended
twisti@2664	1428	#else
twisti@2664	1429	__ ldsw(arg_lsw, O3_scratch); // Load LSW sign-extended
twisti@2664	1430	__ srlx(O3_scratch, BitsPerInt, O2_scratch); // Move MSW value to lower 32-bits for std
twisti@2664	1431	#endif
twisti@2664	1432	__ st_long(O2_scratch, arg_msw); // Uses O2/O3 on !_LP64
twisti@1858	1433	}
twisti@1858	1434	break;
twisti@1858	1435	case _adapter_opt_unboxl:
twisti@1858	1436	{
twisti@1858	1437	// Load the value up from the heap.
twisti@1858	1438	__ ld_ptr(arg_lsw, O1_scratch);
twisti@1858	1439	int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
twisti@1858	1440	assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
twisti@1858	1441	__ null_check(O1_scratch, value_offset);
twisti@1858	1442	__ ld_long(Address(O1_scratch, value_offset), O2_scratch); // Uses O2/O3 on !_LP64
twisti@1858	1443	__ st_long(O2_scratch, arg_msw);
twisti@1858	1444	}
twisti@1858	1445	break;
twisti@1858	1446	default:
twisti@1858	1447	ShouldNotReachHere();
twisti@1858	1448	}
twisti@1858	1449
twisti@2201	1450	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858	1451	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	1452	}
twisti@1858	1453	break;
twisti@1858	1454
twisti@1858	1455	case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
twisti@1858	1456	case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
twisti@1858	1457	{
twisti@1858	1458	// perform an in-place floating primitive conversion
twisti@1858	1459	__ unimplemented(entry_name(ek));
twisti@1858	1460	}
twisti@1858	1461	break;
twisti@1858	1462
twisti@1858	1463	case _adapter_prim_to_ref:
twisti@1858	1464	__ unimplemented(entry_name(ek)); // %%% FIXME: NYI
twisti@1858	1465	break;
twisti@1858	1466
twisti@1858	1467	case _adapter_swap_args:
twisti@1858	1468	case _adapter_rot_args:
twisti@1858	1469	// handled completely by optimized cases
twisti@1858	1470	__ stop("init_AdapterMethodHandle should not issue this");
twisti@1858	1471	break;
twisti@1858	1472
twisti@1858	1473	case _adapter_opt_swap_1:
twisti@1858	1474	case _adapter_opt_swap_2:
twisti@1858	1475	case _adapter_opt_rot_1_up:
twisti@1858	1476	case _adapter_opt_rot_1_down:
twisti@1858	1477	case _adapter_opt_rot_2_up:
twisti@1858	1478	case _adapter_opt_rot_2_down:
twisti@1858	1479	{
never@2950	1480	int swap_slots = ek_adapter_opt_swap_slots(ek);
never@2950	1481	int rotate = ek_adapter_opt_swap_mode(ek);
twisti@1858	1482
twisti@1858	1483	// 'argslot' is the position of the first argument to swap.
never@2950	1484	load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
never@2950	1485	__ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
never@2950	1486	if (VerifyMethodHandles)
never@2950	1487	verify_argslot(_masm, O0_argslot, O2_scratch, "swap point must fall within current frame");
twisti@1858	1488
twisti@1858	1489	// 'vminfo' is the second.
twisti@1858	1490	Register O1_destslot = O1_scratch;
never@2950	1491	load_conversion_vminfo(_masm, G3_amh_conversion, O1_destslot);
never@2950	1492	__ add(__ argument_address(O1_destslot, O1_destslot), O1_destslot);
never@2950	1493	if (VerifyMethodHandles)
never@2950	1494	verify_argslot(_masm, O1_destslot, O2_scratch, "swap point must fall within current frame");
twisti@1858	1495
never@2950	1496	assert(Interpreter::stackElementSize == wordSize, "else rethink use of wordSize here");
twisti@1858	1497	if (!rotate) {
never@2950	1498	// simple swap
never@2950	1499	for (int i = 0; i < swap_slots; i++) {
never@2950	1500	__ ld_ptr( Address(O0_argslot, i * wordSize), O2_scratch);
never@2950	1501	__ ld_ptr( Address(O1_destslot, i * wordSize), O3_scratch);
never@2950	1502	__ st_ptr(O3_scratch, Address(O0_argslot, i * wordSize));
never@2950	1503	__ st_ptr(O2_scratch, Address(O1_destslot, i * wordSize));
twisti@1858	1504	}
twisti@1858	1505	} else {
never@2950	1506	// A rotate is actually pair of moves, with an "odd slot" (or pair)
never@2950	1507	// changing place with a series of other slots.
never@2950	1508	// First, push the "odd slot", which is going to get overwritten
never@2950	1509	switch (swap_slots) {
never@2950	1510	case 2 : __ ld_ptr(Address(O0_argslot, 1 * wordSize), O4_scratch); // fall-thru
never@2950	1511	case 1 : __ ld_ptr(Address(O0_argslot, 0 * wordSize), O3_scratch); break;
never@2950	1512	default: ShouldNotReachHere();
twisti@1858	1513	}
twisti@1858	1514	if (rotate > 0) {
never@2950	1515	// Here is rotate > 0:
never@2950	1516	// (low mem) (high mem)
never@2950	1517	// | dest: more_slots... | arg: odd_slot :arg+1 |
never@2950	1518	// =>
never@2950	1519	// | dest: odd_slot | dest+1: more_slots... :arg+1 |
never@2950	1520	// work argslot down to destslot, copying contiguous data upwards
never@2950	1521	// pseudo-code:
twisti@1858	1522	// argslot = src_addr - swap_bytes
twisti@1858	1523	// destslot = dest_addr
never@2950	1524	// while (argslot >= destslot) *(argslot + swap_bytes) = *(argslot + 0), argslot--;
never@2950	1525	move_arg_slots_up(_masm,
never@2950	1526	O1_destslot,
never@2950	1527	Address(O0_argslot, 0),
never@2950	1528	swap_slots,
never@2950	1529	O0_argslot, O2_scratch);
twisti@1858	1530	} else {
never@2950	1531	// Here is the other direction, rotate < 0:
never@2950	1532	// (low mem) (high mem)
never@2950	1533	// | arg: odd_slot | arg+1: more_slots... :dest+1 |
never@2950	1534	// =>
never@2950	1535	// | arg: more_slots... | dest: odd_slot :dest+1 |
never@2950	1536	// work argslot up to destslot, copying contiguous data downwards
never@2950	1537	// pseudo-code:
twisti@1858	1538	// argslot = src_addr + swap_bytes
twisti@1858	1539	// destslot = dest_addr
never@2950	1540	// while (argslot <= destslot) *(argslot - swap_bytes) = *(argslot + 0), argslot++;
never@2954	1541	// dest_slot denotes an exclusive upper limit
never@2954	1542	int limit_bias = OP_ROT_ARGS_DOWN_LIMIT_BIAS;
never@2954	1543	if (limit_bias != 0)
never@2954	1544	__ add(O1_destslot, - limit_bias * wordSize, O1_destslot);
never@2950	1545	move_arg_slots_down(_masm,
never@2950	1546	Address(O0_argslot, swap_slots * wordSize),
never@2950	1547	O1_destslot,
never@2950	1548	-swap_slots,
never@2950	1549	O0_argslot, O2_scratch);
never@2950	1550
never@2954	1551	__ sub(O1_destslot, swap_slots * wordSize, O1_destslot);
twisti@1858	1552	}
never@2950	1553	// pop the original first chunk into the destination slot, now free
never@2950	1554	switch (swap_slots) {
never@2950	1555	case 2 : __ st_ptr(O4_scratch, Address(O1_destslot, 1 * wordSize)); // fall-thru
never@2950	1556	case 1 : __ st_ptr(O3_scratch, Address(O1_destslot, 0 * wordSize)); break;
never@2950	1557	default: ShouldNotReachHere();
twisti@1858	1558	}
twisti@1858	1559	}
twisti@1858	1560
twisti@2201	1561	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858	1562	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	1563	}
twisti@1858	1564	break;
twisti@1858	1565
twisti@1858	1566	case _adapter_dup_args:
twisti@1858	1567	{
twisti@1858	1568	// 'argslot' is the position of the first argument to duplicate.
never@2950	1569	load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
never@2950	1570	__ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
twisti@1858	1571
twisti@1858	1572	// 'stack_move' is negative number of words to duplicate.
never@2950	1573	Register O1_stack_move = O1_scratch;
never@2950	1574	load_stack_move(_masm, G3_amh_conversion, O1_stack_move);
twisti@1858	1575
never@2950	1576	if (VerifyMethodHandles) {
never@2950	1577	verify_argslots(_masm, O1_stack_move, O0_argslot, O2_scratch, O3_scratch, true,
never@2950	1578	"copied argument(s) must fall within current frame");
never@2950	1579	}
twisti@1858	1580
never@2950	1581	// insert location is always the bottom of the argument list:
never@2950	1582	__ neg(O1_stack_move);
never@2950	1583	push_arg_slots(_masm, O0_argslot, O1_stack_move, O2_scratch, O3_scratch);
twisti@1858	1584
twisti@2201	1585	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858	1586	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	1587	}
twisti@1858	1588	break;
twisti@1858	1589
twisti@1858	1590	case _adapter_drop_args:
twisti@1858	1591	{
twisti@1858	1592	// 'argslot' is the position of the first argument to nuke.
never@2950	1593	load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
never@2950	1594	__ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
twisti@1858	1595
twisti@1858	1596	// 'stack_move' is number of words to drop.
never@2950	1597	Register O1_stack_move = O1_scratch;
never@2950	1598	load_stack_move(_masm, G3_amh_conversion, O1_stack_move);
twisti@1858	1599
never@2950	1600	remove_arg_slots(_masm, O1_stack_move, O0_argslot, O2_scratch, O3_scratch, O4_scratch);
twisti@1858	1601
twisti@2201	1602	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858	1603	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	1604	}
twisti@1858	1605	break;
twisti@1858	1606
twisti@1858	1607	case _adapter_collect_args:
never@2950	1608	case _adapter_fold_args:
twisti@1858	1609	case _adapter_spread_args:
twisti@1858	1610	// Handled completely by optimized cases.
twisti@1858	1611	__ stop("init_AdapterMethodHandle should not issue this");
twisti@1858	1612	break;
twisti@1858	1613
never@2950	1614	case _adapter_opt_collect_ref:
never@2950	1615	case _adapter_opt_collect_int:
never@2950	1616	case _adapter_opt_collect_long:
never@2950	1617	case _adapter_opt_collect_float:
never@2950	1618	case _adapter_opt_collect_double:
never@2950	1619	case _adapter_opt_collect_void:
never@2950	1620	case _adapter_opt_collect_0_ref:
never@2950	1621	case _adapter_opt_collect_1_ref:
never@2950	1622	case _adapter_opt_collect_2_ref:
never@2950	1623	case _adapter_opt_collect_3_ref:
never@2950	1624	case _adapter_opt_collect_4_ref:
never@2950	1625	case _adapter_opt_collect_5_ref:
never@2950	1626	case _adapter_opt_filter_S0_ref:
never@2950	1627	case _adapter_opt_filter_S1_ref:
never@2950	1628	case _adapter_opt_filter_S2_ref:
never@2950	1629	case _adapter_opt_filter_S3_ref:
never@2950	1630	case _adapter_opt_filter_S4_ref:
never@2950	1631	case _adapter_opt_filter_S5_ref:
never@2950	1632	case _adapter_opt_collect_2_S0_ref:
never@2950	1633	case _adapter_opt_collect_2_S1_ref:
never@2950	1634	case _adapter_opt_collect_2_S2_ref:
never@2950	1635	case _adapter_opt_collect_2_S3_ref:
never@2950	1636	case _adapter_opt_collect_2_S4_ref:
never@2950	1637	case _adapter_opt_collect_2_S5_ref:
never@2950	1638	case _adapter_opt_fold_ref:
never@2950	1639	case _adapter_opt_fold_int:
never@2950	1640	case _adapter_opt_fold_long:
never@2950	1641	case _adapter_opt_fold_float:
never@2950	1642	case _adapter_opt_fold_double:
never@2950	1643	case _adapter_opt_fold_void:
never@2950	1644	case _adapter_opt_fold_1_ref:
never@2950	1645	case _adapter_opt_fold_2_ref:
never@2950	1646	case _adapter_opt_fold_3_ref:
never@2950	1647	case _adapter_opt_fold_4_ref:
never@2950	1648	case _adapter_opt_fold_5_ref:
twisti@1858	1649	{
never@2950	1650	// Given a fresh incoming stack frame, build a new ricochet frame.
never@2950	1651	// On entry, TOS points at a return PC, and FP is the callers frame ptr.
never@2950	1652	// RSI/R13 has the caller's exact stack pointer, which we must also preserve.
never@2950	1653	// RCX contains an AdapterMethodHandle of the indicated kind.
never@2950	1654
never@2950	1655	// Relevant AMH fields:
never@2950	1656	// amh.vmargslot:
never@2950	1657	// points to the trailing edge of the arguments
never@2950	1658	// to filter, collect, or fold. For a boxing operation,
never@2950	1659	// it points just after the single primitive value.
never@2950	1660	// amh.argument:
never@2950	1661	// recursively called MH, on |collect| arguments
never@2950	1662	// amh.vmtarget:
never@2950	1663	// final destination MH, on return value, etc.
never@2950	1664	// amh.conversion.dest:
never@2950	1665	// tells what is the type of the return value
never@2950	1666	// (not needed here, since dest is also derived from ek)
never@2950	1667	// amh.conversion.vminfo:
never@2950	1668	// points to the trailing edge of the return value
never@2950	1669	// when the vmtarget is to be called; this is
never@2950	1670	// equal to vmargslot + (retained ? |collect| : 0)
never@2950	1671
never@2950	1672	// Pass 0 or more argument slots to the recursive target.
never@2950	1673	int collect_count_constant = ek_adapter_opt_collect_count(ek);
never@2950	1674
never@2950	1675	// The collected arguments are copied from the saved argument list:
never@2950	1676	int collect_slot_constant = ek_adapter_opt_collect_slot(ek);
never@2950	1677
never@2950	1678	assert(ek_orig == _adapter_collect_args ||
never@2950	1679	ek_orig == _adapter_fold_args, "");
never@2950	1680	bool retain_original_args = (ek_orig == _adapter_fold_args);
never@2950	1681
never@2950	1682	// The return value is replaced (or inserted) at the 'vminfo' argslot.
never@2950	1683	// Sometimes we can compute this statically.
never@2950	1684	int dest_slot_constant = -1;
never@2950	1685	if (!retain_original_args)
never@2950	1686	dest_slot_constant = collect_slot_constant;
never@2950	1687	else if (collect_slot_constant >= 0 && collect_count_constant >= 0)
never@2950	1688	// We are preserving all the arguments, and the return value is prepended,
never@2950	1689	// so the return slot is to the left (above) the |collect| sequence.
never@2950	1690	dest_slot_constant = collect_slot_constant + collect_count_constant;
never@2950	1691
never@2950	1692	// Replace all those slots by the result of the recursive call.
never@2950	1693	// The result type can be one of ref, int, long, float, double, void.
never@2950	1694	// In the case of void, nothing is pushed on the stack after return.
never@2950	1695	BasicType dest = ek_adapter_opt_collect_type(ek);
never@2950	1696	assert(dest == type2wfield[dest], "dest is a stack slot type");
never@2950	1697	int dest_count = type2size[dest];
never@2950	1698	assert(dest_count == 1 || dest_count == 2 || (dest_count == 0 && dest == T_VOID), "dest has a size");
never@2950	1699
never@2950	1700	// Choose a return continuation.
never@2950	1701	EntryKind ek_ret = _adapter_opt_return_any;
never@2950	1702	if (dest != T_CONFLICT && OptimizeMethodHandles) {
never@2950	1703	switch (dest) {
never@2950	1704	case T_INT : ek_ret = _adapter_opt_return_int; break;
never@2950	1705	case T_LONG : ek_ret = _adapter_opt_return_long; break;
never@2950	1706	case T_FLOAT : ek_ret = _adapter_opt_return_float; break;
never@2950	1707	case T_DOUBLE : ek_ret = _adapter_opt_return_double; break;
never@2950	1708	case T_OBJECT : ek_ret = _adapter_opt_return_ref; break;
never@2950	1709	case T_VOID : ek_ret = _adapter_opt_return_void; break;
never@2950	1710	default : ShouldNotReachHere();
never@2950	1711	}
never@2950	1712	if (dest == T_OBJECT && dest_slot_constant >= 0) {
never@2950	1713	EntryKind ek_try = EntryKind(_adapter_opt_return_S0_ref + dest_slot_constant);
never@2950	1714	if (ek_try <= _adapter_opt_return_LAST &&
never@2950	1715	ek_adapter_opt_return_slot(ek_try) == dest_slot_constant) {
never@2950	1716	ek_ret = ek_try;
never@2950	1717	}
never@2950	1718	}
never@2950	1719	assert(ek_adapter_opt_return_type(ek_ret) == dest, "");
never@2950	1720	}
never@2950	1721
never@2950	1722	// Already pushed: ... keep1 | collect | keep2 |
never@2950	1723
never@2950	1724	// Push a few extra argument words, if we need them to store the return value.
never@2950	1725	{
never@2950	1726	int extra_slots = 0;
never@2950	1727	if (retain_original_args) {
never@2950	1728	extra_slots = dest_count;
never@2950	1729	} else if (collect_count_constant == -1) {
never@2950	1730	extra_slots = dest_count; // collect_count might be zero; be generous
never@2950	1731	} else if (dest_count > collect_count_constant) {
never@2950	1732	extra_slots = (dest_count - collect_count_constant);
never@2950	1733	} else {
never@2950	1734	// else we know we have enough dead space in |collect| to repurpose for return values
never@2950	1735	}
never@2950	1736	if (extra_slots != 0) {
never@2950	1737	__ sub(SP, round_to(extra_slots, 2) * Interpreter::stackElementSize, SP);
never@2950	1738	}
never@2950	1739	}
never@2950	1740
never@2950	1741	// Set up Ricochet Frame.
never@2950	1742	__ mov(SP, O5_savedSP); // record SP for the callee
never@2950	1743
never@2950	1744	// One extra (empty) slot for outgoing target MH (see Gargs computation below).
never@2950	1745	__ save_frame(2); // Note: we need to add 2 slots since frame::memory_parameter_word_sp_offset is 23.
never@2950	1746
never@2950	1747	// Note: Gargs is live throughout the following, until we make our recursive call.
never@2950	1748	// And the RF saves a copy in L4_saved_args_base.
never@2950	1749
never@2950	1750	RicochetFrame::enter_ricochet_frame(_masm, G3_method_handle, Gargs,
never@2950	1751	entry(ek_ret)->from_interpreted_entry());
never@2950	1752
never@2950	1753	// Compute argument base:
never@2950	1754	// Set up Gargs for current frame, extra (empty) slot is for outgoing target MH (space reserved by save_frame above).
never@2950	1755	__ add(FP, STACK_BIAS - (1 * Interpreter::stackElementSize), Gargs);
never@2950	1756
never@2950	1757	// Now pushed: ... keep1 | collect | keep2 | extra | [RF]
never@2950	1758
never@2950	1759	#ifdef ASSERT
never@2950	1760	if (VerifyMethodHandles && dest != T_CONFLICT) {
never@2950	1761	BLOCK_COMMENT("verify AMH.conv.dest {");
never@2950	1762	extract_conversion_dest_type(_masm, RicochetFrame::L5_conversion, O1_scratch);
never@2950	1763	Label L_dest_ok;
never@2950	1764	__ cmp(O1_scratch, (int) dest);
never@2950	1765	__ br(Assembler::equal, false, Assembler::pt, L_dest_ok);
never@2950	1766	__ delayed()->nop();
never@2950	1767	if (dest == T_INT) {
never@2950	1768	for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
never@2950	1769	if (is_subword_type(BasicType(bt))) {
never@2950	1770	__ cmp(O1_scratch, (int) bt);
never@2950	1771	__ br(Assembler::equal, false, Assembler::pt, L_dest_ok);
never@2950	1772	__ delayed()->nop();
never@2950	1773	}
never@2950	1774	}
never@2950	1775	}
never@2950	1776	__ stop("bad dest in AMH.conv");
never@2950	1777	__ BIND(L_dest_ok);
never@2950	1778	BLOCK_COMMENT("} verify AMH.conv.dest");
never@2950	1779	}
never@2950	1780	#endif //ASSERT
never@2950	1781
never@2950	1782	// Find out where the original copy of the recursive argument sequence begins.
never@2950	1783	Register O0_coll = O0_scratch;
never@2950	1784	{
never@2950	1785	RegisterOrConstant collect_slot = collect_slot_constant;
never@2950	1786	if (collect_slot_constant == -1) {
never@2950	1787	load_vmargslot(_masm, G3_amh_vmargslot, O1_scratch);
never@2950	1788	collect_slot = O1_scratch;
never@2950	1789	}
never@2950	1790	// collect_slot might be 0, but we need the move anyway.
never@2950	1791	__ add(RicochetFrame::L4_saved_args_base, __ argument_offset(collect_slot, collect_slot.register_or_noreg()), O0_coll);
never@2950	1792	// O0_coll now points at the trailing edge of |collect| and leading edge of |keep2|
never@2950	1793	}
never@2950	1794
never@2950	1795	// Replace the old AMH with the recursive MH. (No going back now.)
never@2950	1796	// In the case of a boxing call, the recursive call is to a 'boxer' method,
never@2950	1797	// such as Integer.valueOf or Long.valueOf. In the case of a filter
never@2950	1798	// or collect call, it will take one or more arguments, transform them,
never@2950	1799	// and return some result, to store back into argument_base[vminfo].
never@2950	1800	__ load_heap_oop(G3_amh_argument, G3_method_handle);
never@2950	1801	if (VerifyMethodHandles) verify_method_handle(_masm, G3_method_handle, O1_scratch, O2_scratch);
never@2950	1802
never@2950	1803	// Calculate |collect|, the number of arguments we are collecting.
never@2950	1804	Register O1_collect_count = O1_scratch;
never@2950	1805	RegisterOrConstant collect_count;
never@2950	1806	if (collect_count_constant < 0) {
never@2950	1807	__ load_method_handle_vmslots(O1_collect_count, G3_method_handle, O2_scratch);
never@2950	1808	collect_count = O1_collect_count;
never@2950	1809	} else {
never@2950	1810	collect_count = collect_count_constant;
never@2950	1811	#ifdef ASSERT
never@2950	1812	if (VerifyMethodHandles) {
never@2950	1813	BLOCK_COMMENT("verify collect_count_constant {");
never@2950	1814	__ load_method_handle_vmslots(O3_scratch, G3_method_handle, O2_scratch);
never@2950	1815	Label L_count_ok;
kvn@3037	1816	__ cmp_and_br_short(O3_scratch, collect_count_constant, Assembler::equal, Assembler::pt, L_count_ok);
never@2950	1817	__ stop("bad vminfo in AMH.conv");
never@2950	1818	__ BIND(L_count_ok);
never@2950	1819	BLOCK_COMMENT("} verify collect_count_constant");
never@2950	1820	}
never@2950	1821	#endif //ASSERT
never@2950	1822	}
never@2950	1823
never@2950	1824	// copy |collect| slots directly to TOS:
never@2950	1825	push_arg_slots(_masm, O0_coll, collect_count, O2_scratch, O3_scratch);
never@2950	1826	// Now pushed: ... keep1 | collect | keep2 | RF... | collect |
never@2950	1827	// O0_coll still points at the trailing edge of |collect| and leading edge of |keep2|
never@2950	1828
never@2950	1829	// If necessary, adjust the saved arguments to make room for the eventual return value.
never@2950	1830	// Normal adjustment: ... keep1 | +dest+ | -collect- | keep2 | RF... | collect |
never@2950	1831	// If retaining args: ... keep1 | +dest+ | collect | keep2 | RF... | collect |
never@2950	1832	// In the non-retaining case, this might move keep2 either up or down.
never@2950	1833	// We don't have to copy the whole | RF... collect | complex,
never@2950	1834	// but we must adjust RF.saved_args_base.
never@2950	1835	// Also, from now on, we will forget about the original copy of |collect|.
never@2950	1836	// If we are retaining it, we will treat it as part of |keep2|.
never@2950	1837	// For clarity we will define |keep3| = |collect|keep2| or |keep2|.
never@2950	1838
never@2950	1839	BLOCK_COMMENT("adjust trailing arguments {");
never@2950	1840	// Compare the sizes of |+dest+| and |-collect-|, which are opposed opening and closing movements.
never@2950	1841	int open_count = dest_count;
never@2950	1842	RegisterOrConstant close_count = collect_count_constant;
never@2950	1843	Register O1_close_count = O1_collect_count;
never@2950	1844	if (retain_original_args) {
never@2950	1845	close_count = constant(0);
never@2950	1846	} else if (collect_count_constant == -1) {
never@2950	1847	close_count = O1_collect_count;
never@2950	1848	}
never@2950	1849
never@2950	1850	// How many slots need moving? This is simply dest_slot (0 => no |keep3|).
never@2950	1851	RegisterOrConstant keep3_count;
never@2950	1852	Register O2_keep3_count = O2_scratch;
never@2950	1853	if (dest_slot_constant < 0) {
never@2950	1854	extract_conversion_vminfo(_masm, RicochetFrame::L5_conversion, O2_keep3_count);
never@2950	1855	keep3_count = O2_keep3_count;
never@2950	1856	} else {
never@2950	1857	keep3_count = dest_slot_constant;
never@2950	1858	#ifdef ASSERT
never@2950	1859	if (VerifyMethodHandles && dest_slot_constant < 0) {
never@2950	1860	BLOCK_COMMENT("verify dest_slot_constant {");
never@2950	1861	extract_conversion_vminfo(_masm, RicochetFrame::L5_conversion, O3_scratch);
never@2950	1862	Label L_vminfo_ok;
kvn@3037	1863	__ cmp_and_br_short(O3_scratch, dest_slot_constant, Assembler::equal, Assembler::pt, L_vminfo_ok);
never@2950	1864	__ stop("bad vminfo in AMH.conv");
never@2950	1865	__ BIND(L_vminfo_ok);
never@2950	1866	BLOCK_COMMENT("} verify dest_slot_constant");
never@2950	1867	}
never@2950	1868	#endif //ASSERT
never@2950	1869	}
never@2950	1870
never@2950	1871	// tasks remaining:
never@2950	1872	bool move_keep3 = (!keep3_count.is_constant() || keep3_count.as_constant() != 0);
never@2950	1873	bool stomp_dest = (NOT_DEBUG(dest == T_OBJECT) DEBUG_ONLY(dest_count != 0));
never@2950	1874	bool fix_arg_base = (!close_count.is_constant() || open_count != close_count.as_constant());
never@2950	1875
never@2950	1876	// Old and new argument locations (based at slot 0).
never@2950	1877	// Net shift (&new_argv - &old_argv) is (close_count - open_count).
never@2950	1878	bool zero_open_count = (open_count == 0); // remember this bit of info
never@2950	1879	if (move_keep3 && fix_arg_base) {
never@2950	1880	// It will be easier to have everything in one register:
never@2950	1881	if (close_count.is_register()) {
never@2950	1882	// Deduct open_count from close_count register to get a clean +/- value.
never@2950	1883	__ sub(close_count.as_register(), open_count, close_count.as_register());
never@2950	1884	} else {
never@2950	1885	close_count = close_count.as_constant() - open_count;
never@2950	1886	}
never@2950	1887	open_count = 0;
never@2950	1888	}
never@2950	1889	Register L4_old_argv = RicochetFrame::L4_saved_args_base;
never@2950	1890	Register O3_new_argv = O3_scratch;
never@2950	1891	if (fix_arg_base) {
never@2950	1892	__ add(L4_old_argv, __ argument_offset(close_count, O4_scratch), O3_new_argv,
never@2950	1893	-(open_count * Interpreter::stackElementSize));
never@2950	1894	}
never@2950	1895
never@2950	1896	// First decide if any actual data are to be moved.
never@2950	1897	// We can skip if (a) |keep3| is empty, or (b) the argument list size didn't change.
never@2950	1898	// (As it happens, all movements involve an argument list size change.)
never@2950	1899
never@2950	1900	// If there are variable parameters, use dynamic checks to skip around the whole mess.
never@2950	1901	Label L_done;
never@2950	1902	if (keep3_count.is_register()) {
kvn@3037	1903	__ cmp_and_br_short(keep3_count.as_register(), 0, Assembler::equal, Assembler::pn, L_done);
never@2950	1904	}
never@2950	1905	if (close_count.is_register()) {
kvn@3037	1906	__ cmp_and_br_short(close_count.as_register(), open_count, Assembler::equal, Assembler::pn, L_done);
never@2950	1907	}
never@2950	1908
never@2950	1909	if (move_keep3 && fix_arg_base) {
never@2950	1910	bool emit_move_down = false, emit_move_up = false, emit_guard = false;
never@2950	1911	if (!close_count.is_constant()) {
never@2950	1912	emit_move_down = emit_guard = !zero_open_count;
never@2950	1913	emit_move_up = true;
never@2950	1914	} else if (open_count != close_count.as_constant()) {
never@2950	1915	emit_move_down = (open_count > close_count.as_constant());
never@2950	1916	emit_move_up = !emit_move_down;
never@2950	1917	}
never@2950	1918	Label L_move_up;
never@2950	1919	if (emit_guard) {
never@2950	1920	__ cmp(close_count.as_register(), open_count);
never@2950	1921	__ br(Assembler::greater, false, Assembler::pn, L_move_up);
never@2950	1922	__ delayed()->nop();
never@2950	1923	}
never@2950	1924
never@2950	1925	if (emit_move_down) {
never@2950	1926	// Move arguments down if |+dest+| > |-collect-|
never@2950	1927	// (This is rare, except when arguments are retained.)
never@2950	1928	// This opens space for the return value.
never@2950	1929	if (keep3_count.is_constant()) {
never@2950	1930	for (int i = 0; i < keep3_count.as_constant(); i++) {
never@2950	1931	__ ld_ptr( Address(L4_old_argv, i * Interpreter::stackElementSize), O4_scratch);
never@2950	1932	__ st_ptr(O4_scratch, Address(O3_new_argv, i * Interpreter::stackElementSize) );
never@2950	1933	}
never@2950	1934	} else {
never@2950	1935	// Live: O1_close_count, O2_keep3_count, O3_new_argv
never@2950	1936	Register argv_top = O0_scratch;
never@2950	1937	__ add(L4_old_argv, __ argument_offset(keep3_count, O4_scratch), argv_top);
never@2950	1938	move_arg_slots_down(_masm,
never@2950	1939	Address(L4_old_argv, 0), // beginning of old argv
never@2950	1940	argv_top, // end of old argv
never@2950	1941	close_count, // distance to move down (must be negative)
never@2950	1942	O4_scratch, G5_scratch);
never@2950	1943	}
never@2950	1944	}
never@2950	1945
never@2950	1946	if (emit_guard) {
kvn@3037	1947	__ ba_short(L_done); // assumes emit_move_up is true also
never@2950	1948	__ BIND(L_move_up);
never@2950	1949	}
never@2950	1950
never@2950	1951	if (emit_move_up) {
never@2950	1952	// Move arguments up if |+dest+| < |-collect-|
never@2950	1953	// (This is usual, except when |keep3| is empty.)
never@2950	1954	// This closes up the space occupied by the now-deleted collect values.
never@2950	1955	if (keep3_count.is_constant()) {
never@2950	1956	for (int i = keep3_count.as_constant() - 1; i >= 0; i--) {
never@2950	1957	__ ld_ptr( Address(L4_old_argv, i * Interpreter::stackElementSize), O4_scratch);
never@2950	1958	__ st_ptr(O4_scratch, Address(O3_new_argv, i * Interpreter::stackElementSize) );
never@2950	1959	}
never@2950	1960	} else {
never@2950	1961	Address argv_top(L4_old_argv, __ argument_offset(keep3_count, O4_scratch));
never@2950	1962	// Live: O1_close_count, O2_keep3_count, O3_new_argv
never@2950	1963	move_arg_slots_up(_masm,
never@2950	1964	L4_old_argv, // beginning of old argv
never@2950	1965	argv_top, // end of old argv
never@2950	1966	close_count, // distance to move up (must be positive)
never@2950	1967	O4_scratch, G5_scratch);
never@2950	1968	}
never@2950	1969	}
never@2950	1970	}
never@2950	1971	__ BIND(L_done);
never@2950	1972
never@2950	1973	if (fix_arg_base) {
never@2950	1974	// adjust RF.saved_args_base
never@2950	1975	__ mov(O3_new_argv, RicochetFrame::L4_saved_args_base);
never@2950	1976	}
never@2950	1977
never@2950	1978	if (stomp_dest) {
never@2950	1979	// Stomp the return slot, so it doesn't hold garbage.
never@2950	1980	// This isn't strictly necessary, but it may help detect bugs.
never@2950	1981	__ set(RicochetFrame::RETURN_VALUE_PLACEHOLDER, O4_scratch);
never@2950	1982	__ st_ptr(O4_scratch, Address(RicochetFrame::L4_saved_args_base,
never@2950	1983	__ argument_offset(keep3_count, keep3_count.register_or_noreg()))); // uses O2_keep3_count
never@2950	1984	}
never@2950	1985	BLOCK_COMMENT("} adjust trailing arguments");
never@2950	1986
never@2950	1987	BLOCK_COMMENT("do_recursive_call");
never@2950	1988	__ mov(SP, O5_savedSP); // record SP for the callee
never@2950	1989	__ set(ExternalAddress(SharedRuntime::ricochet_blob()->bounce_addr() - frame::pc_return_offset), O7);
never@2950	1990	// The globally unique bounce address has two purposes:
never@2950	1991	// 1. It helps the JVM recognize this frame (frame::is_ricochet_frame).
never@2950	1992	// 2. When returned to, it cuts back the stack and redirects control flow
never@2950	1993	// to the return handler.
never@2950	1994	// The return handler will further cut back the stack when it takes
never@2950	1995	// down the RF. Perhaps there is a way to streamline this further.
never@2950	1996
never@2950	1997	// State during recursive call:
never@2950	1998	// ... keep1 | dest | dest=42 | keep3 | RF... | collect | bounce_pc |
never@2950	1999	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	2000	}
twisti@1858	2001	break;
twisti@1858	2002
never@2950	2003	case _adapter_opt_return_ref:
never@2950	2004	case _adapter_opt_return_int:
never@2950	2005	case _adapter_opt_return_long:
never@2950	2006	case _adapter_opt_return_float:
never@2950	2007	case _adapter_opt_return_double:
never@2950	2008	case _adapter_opt_return_void:
never@2950	2009	case _adapter_opt_return_S0_ref:
never@2950	2010	case _adapter_opt_return_S1_ref:
never@2950	2011	case _adapter_opt_return_S2_ref:
never@2950	2012	case _adapter_opt_return_S3_ref:
never@2950	2013	case _adapter_opt_return_S4_ref:
never@2950	2014	case _adapter_opt_return_S5_ref:
never@2950	2015	{
never@2950	2016	BasicType dest_type_constant = ek_adapter_opt_return_type(ek);
never@2950	2017	int dest_slot_constant = ek_adapter_opt_return_slot(ek);
never@2950	2018
never@2950	2019	if (VerifyMethodHandles) RicochetFrame::verify_clean(_masm);
never@2950	2020
never@2950	2021	if (dest_slot_constant == -1) {
never@2950	2022	// The current stub is a general handler for this dest_type.
never@2950	2023	// It can be called from _adapter_opt_return_any below.
never@2950	2024	// Stash the address in a little table.
never@2950	2025	assert((dest_type_constant & CONV_TYPE_MASK) == dest_type_constant, "oob");
never@2950	2026	address return_handler = __ pc();
never@2950	2027	_adapter_return_handlers[dest_type_constant] = return_handler;
never@2950	2028	if (dest_type_constant == T_INT) {
never@2950	2029	// do the subword types too
never@2950	2030	for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
never@2950	2031	if (is_subword_type(BasicType(bt)) &&
never@2950	2032	_adapter_return_handlers[bt] == NULL) {
never@2950	2033	_adapter_return_handlers[bt] = return_handler;
never@2950	2034	}
never@2950	2035	}
never@2950	2036	}
never@2950	2037	}
never@2950	2038
never@2950	2039	// On entry to this continuation handler, make Gargs live again.
never@2950	2040	__ mov(RicochetFrame::L4_saved_args_base, Gargs);
never@2950	2041
never@2950	2042	Register O7_temp = O7;
never@2950	2043	Register O5_vminfo = O5;
never@2950	2044
never@2950	2045	RegisterOrConstant dest_slot = dest_slot_constant;
never@2950	2046	if (dest_slot_constant == -1) {
never@2950	2047	extract_conversion_vminfo(_masm, RicochetFrame::L5_conversion, O5_vminfo);
never@2950	2048	dest_slot = O5_vminfo;
never@2950	2049	}
never@2950	2050	// Store the result back into the argslot.
never@2950	2051	// This code uses the interpreter calling sequence, in which the return value
never@2950	2052	// is usually left in the TOS register, as defined by InterpreterMacroAssembler::pop.
never@2950	2053	// There are certain irregularities with floating point values, which can be seen
never@2950	2054	// in TemplateInterpreterGenerator::generate_return_entry_for.
never@2950	2055	move_return_value(_masm, dest_type_constant, __ argument_address(dest_slot, O7_temp));
never@2950	2056
never@2950	2057	RicochetFrame::leave_ricochet_frame(_masm, G3_method_handle, I5_savedSP, I7);
never@2950	2058
never@2950	2059	// Load the final target and go.
never@2950	2060	if (VerifyMethodHandles) verify_method_handle(_masm, G3_method_handle, O0_scratch, O1_scratch);
never@2950	2061	__ restore(I5_savedSP, G0, SP);
never@2950	2062	__ jump_to_method_handle_entry(G3_method_handle, O0_scratch);
never@2950	2063	__ illtrap(0);
never@2950	2064	}
never@2950	2065	break;
never@2950	2066
never@2950	2067	case _adapter_opt_return_any:
never@2950	2068	{
never@2950	2069	Register O7_temp = O7;
never@2950	2070	Register O5_dest_type = O5;
never@2950	2071
never@2950	2072	if (VerifyMethodHandles) RicochetFrame::verify_clean(_masm);
never@2950	2073	extract_conversion_dest_type(_masm, RicochetFrame::L5_conversion, O5_dest_type);
never@2950	2074	__ set(ExternalAddress((address) &_adapter_return_handlers[0]), O7_temp);
never@2950	2075	__ sll_ptr(O5_dest_type, LogBytesPerWord, O5_dest_type);
never@2950	2076	__ ld_ptr(O7_temp, O5_dest_type, O7_temp);
never@2950	2077
never@2950	2078	#ifdef ASSERT
never@2950	2079	{ Label L_ok;
kvn@3037	2080	__ br_notnull_short(O7_temp, Assembler::pt, L_ok);
never@2950	2081	__ stop("bad method handle return");
never@2950	2082	__ BIND(L_ok);
never@2950	2083	}
never@2950	2084	#endif //ASSERT
never@2950	2085	__ JMP(O7_temp, 0);
never@2950	2086	__ delayed()->nop();
never@2950	2087	}
never@2950	2088	break;
never@2950	2089
never@2950	2090	case _adapter_opt_spread_0:
never@2950	2091	case _adapter_opt_spread_1_ref:
never@2950	2092	case _adapter_opt_spread_2_ref:
never@2950	2093	case _adapter_opt_spread_3_ref:
never@2950	2094	case _adapter_opt_spread_4_ref:
never@2950	2095	case _adapter_opt_spread_5_ref:
never@2950	2096	case _adapter_opt_spread_ref:
never@2950	2097	case _adapter_opt_spread_byte:
never@2950	2098	case _adapter_opt_spread_char:
never@2950	2099	case _adapter_opt_spread_short:
never@2950	2100	case _adapter_opt_spread_int:
never@2950	2101	case _adapter_opt_spread_long:
never@2950	2102	case _adapter_opt_spread_float:
never@2950	2103	case _adapter_opt_spread_double:
never@2950	2104	{
never@2950	2105	// spread an array out into a group of arguments
never@2950	2106	int length_constant = ek_adapter_opt_spread_count(ek);
never@2950	2107	bool length_can_be_zero = (length_constant == 0);
never@2950	2108	if (length_constant < 0) {
never@2950	2109	// some adapters with variable length must handle the zero case
never@2950	2110	if (!OptimizeMethodHandles ||
never@2950	2111	ek_adapter_opt_spread_type(ek) != T_OBJECT)
never@2950	2112	length_can_be_zero = true;
never@2950	2113	}
never@2950	2114
never@2950	2115	// find the address of the array argument
never@2950	2116	load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
never@2950	2117	__ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
never@2950	2118
never@2950	2119	// O0_argslot points both to the array and to the first output arg
never@2950	2120	Address vmarg = Address(O0_argslot, 0);
never@2950	2121
never@2950	2122	// Get the array value.
never@2950	2123	Register O1_array = O1_scratch;
never@2950	2124	Register O2_array_klass = O2_scratch;
never@2950	2125	BasicType elem_type = ek_adapter_opt_spread_type(ek);
never@2950	2126	int elem_slots = type2size[elem_type]; // 1 or 2
never@2950	2127	int array_slots = 1; // array is always a T_OBJECT
never@2950	2128	int length_offset = arrayOopDesc::length_offset_in_bytes();
never@2950	2129	int elem0_offset = arrayOopDesc::base_offset_in_bytes(elem_type);
never@2950	2130	__ ld_ptr(vmarg, O1_array);
never@2950	2131
never@2950	2132	Label L_array_is_empty, L_insert_arg_space, L_copy_args, L_args_done;
never@2950	2133	if (length_can_be_zero) {
never@2950	2134	// handle the null pointer case, if zero is allowed
never@2950	2135	Label L_skip;
never@2950	2136	if (length_constant < 0) {
never@2950	2137	load_conversion_vminfo(_masm, G3_amh_conversion, O3_scratch);
kvn@3037	2138	__ cmp_zero_and_br(Assembler::notZero, O3_scratch, L_skip);
kvn@3037	2139	__ delayed()->nop(); // to avoid back-to-back cbcond instructions
never@2950	2140	}
kvn@3037	2141	__ br_null_short(O1_array, Assembler::pn, L_array_is_empty);
never@2950	2142	__ BIND(L_skip);
never@2950	2143	}
never@2950	2144	__ null_check(O1_array, oopDesc::klass_offset_in_bytes());
never@2950	2145	__ load_klass(O1_array, O2_array_klass);
never@2950	2146
never@2950	2147	// Check the array type.
never@2950	2148	Register O3_klass = O3_scratch;
never@2950	2149	__ load_heap_oop(G3_amh_argument, O3_klass); // this is a Class object!
never@2950	2150	load_klass_from_Class(_masm, O3_klass, O4_scratch, G5_scratch);
never@2950	2151
never@2950	2152	Label L_ok_array_klass, L_bad_array_klass, L_bad_array_length;
never@2950	2153	__ check_klass_subtype(O2_array_klass, O3_klass, O4_scratch, G5_scratch, L_ok_array_klass);
never@2950	2154	// If we get here, the type check failed!
kvn@3037	2155	__ ba_short(L_bad_array_klass);
never@2950	2156	__ BIND(L_ok_array_klass);
never@2950	2157
never@2950	2158	// Check length.
never@2950	2159	if (length_constant >= 0) {
never@2950	2160	__ ldsw(Address(O1_array, length_offset), O4_scratch);
never@2950	2161	__ cmp(O4_scratch, length_constant);
never@2950	2162	} else {
never@2950	2163	Register O3_vminfo = O3_scratch;
never@2950	2164	load_conversion_vminfo(_masm, G3_amh_conversion, O3_vminfo);
never@2950	2165	__ ldsw(Address(O1_array, length_offset), O4_scratch);
never@2950	2166	__ cmp(O3_vminfo, O4_scratch);
never@2950	2167	}
never@2950	2168	__ br(Assembler::notEqual, false, Assembler::pn, L_bad_array_length);
never@2950	2169	__ delayed()->nop();
never@2950	2170
never@2950	2171	Register O2_argslot_limit = O2_scratch;
never@2950	2172
never@2950	2173	// Array length checks out. Now insert any required stack slots.
never@2950	2174	if (length_constant == -1) {
never@2950	2175	// Form a pointer to the end of the affected region.
never@2950	2176	__ add(O0_argslot, Interpreter::stackElementSize, O2_argslot_limit);
never@2950	2177	// 'stack_move' is negative number of words to insert
never@2950	2178	// This number already accounts for elem_slots.
never@2950	2179	Register O3_stack_move = O3_scratch;
never@2950	2180	load_stack_move(_masm, G3_amh_conversion, O3_stack_move);
never@2950	2181	__ cmp(O3_stack_move, 0);
never@2950	2182	assert(stack_move_unit() < 0, "else change this comparison");
never@2950	2183	__ br(Assembler::less, false, Assembler::pn, L_insert_arg_space);
never@2950	2184	__ delayed()->nop();
never@2950	2185	__ br(Assembler::equal, false, Assembler::pn, L_copy_args);
never@2950	2186	__ delayed()->nop();
never@2950	2187	// single argument case, with no array movement
never@2950	2188	__ BIND(L_array_is_empty);
never@2950	2189	remove_arg_slots(_masm, -stack_move_unit() * array_slots,
never@2950	2190	O0_argslot, O1_scratch, O2_scratch, O3_scratch);
kvn@3037	2191	__ ba_short(L_args_done); // no spreading to do
never@2950	2192	__ BIND(L_insert_arg_space);
never@2950	2193	// come here in the usual case, stack_move < 0 (2 or more spread arguments)
never@2950	2194	// Live: O1_array, O2_argslot_limit, O3_stack_move
never@2950	2195	insert_arg_slots(_masm, O3_stack_move,
never@2950	2196	O0_argslot, O4_scratch, G5_scratch, O1_scratch);
never@2950	2197	// reload from rdx_argslot_limit since rax_argslot is now decremented
never@2950	2198	__ ld_ptr(Address(O2_argslot_limit, -Interpreter::stackElementSize), O1_array);
never@2950	2199	} else if (length_constant >= 1) {
never@2950	2200	int new_slots = (length_constant * elem_slots) - array_slots;
never@2950	2201	insert_arg_slots(_masm, new_slots * stack_move_unit(),
never@2950	2202	O0_argslot, O2_scratch, O3_scratch, O4_scratch);
never@2950	2203	} else if (length_constant == 0) {
never@2950	2204	__ BIND(L_array_is_empty);
never@2950	2205	remove_arg_slots(_masm, -stack_move_unit() * array_slots,
never@2950	2206	O0_argslot, O1_scratch, O2_scratch, O3_scratch);
never@2950	2207	} else {
never@2950	2208	ShouldNotReachHere();
never@2950	2209	}
never@2950	2210
never@2950	2211	// Copy from the array to the new slots.
never@2950	2212	// Note: Stack change code preserves integrity of O0_argslot pointer.
never@2950	2213	// So even after slot insertions, O0_argslot still points to first argument.
never@2950	2214	// Beware: Arguments that are shallow on the stack are deep in the array,
never@2950	2215	// and vice versa. So a downward-growing stack (the usual) has to be copied
never@2950	2216	// elementwise in reverse order from the source array.
never@2950	2217	__ BIND(L_copy_args);
never@2950	2218	if (length_constant == -1) {
never@2950	2219	// [O0_argslot, O2_argslot_limit) is the area we are inserting into.
never@2950	2220	// Array element [0] goes at O0_argslot_limit[-wordSize].
never@2950	2221	Register O1_source = O1_array;
never@2950	2222	__ add(Address(O1_array, elem0_offset), O1_source);
never@2950	2223	Register O4_fill_ptr = O4_scratch;
never@2950	2224	__ mov(O2_argslot_limit, O4_fill_ptr);
never@2950	2225	Label L_loop;
never@2950	2226	__ BIND(L_loop);
never@2950	2227	__ add(O4_fill_ptr, -Interpreter::stackElementSize * elem_slots, O4_fill_ptr);
never@2950	2228	move_typed_arg(_masm, elem_type, true,
never@2950	2229	Address(O1_source, 0), Address(O4_fill_ptr, 0),
never@2950	2230	O2_scratch); // must be an even register for !_LP64 long moves (uses O2/O3)
never@2950	2231	__ add(O1_source, type2aelembytes(elem_type), O1_source);
kvn@3037	2232	__ cmp_and_brx_short(O4_fill_ptr, O0_argslot, Assembler::greaterUnsigned, Assembler::pt, L_loop);
never@2950	2233	} else if (length_constant == 0) {
never@2950	2234	// nothing to copy
never@2950	2235	} else {
never@2950	2236	int elem_offset = elem0_offset;
never@2950	2237	int slot_offset = length_constant * Interpreter::stackElementSize;
never@2950	2238	for (int index = 0; index < length_constant; index++) {
never@2950	2239	slot_offset -= Interpreter::stackElementSize * elem_slots; // fill backward
never@2950	2240	move_typed_arg(_masm, elem_type, true,
never@2950	2241	Address(O1_array, elem_offset), Address(O0_argslot, slot_offset),
never@2950	2242	O2_scratch); // must be an even register for !_LP64 long moves (uses O2/O3)
never@2950	2243	elem_offset += type2aelembytes(elem_type);
never@2950	2244	}
never@2950	2245	}
never@2950	2246	__ BIND(L_args_done);
never@2950	2247
never@2950	2248	// Arguments are spread. Move to next method handle.
never@2950	2249	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
never@2950	2250	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
never@2950	2251
never@2950	2252	__ BIND(L_bad_array_klass);
never@2950	2253	assert(!vmarg.uses(O2_required), "must be different registers");
never@2950	2254	__ load_heap_oop(Address(O2_array_klass, java_mirror_offset), O2_required); // required class
never@2950	2255	__ ld_ptr( vmarg, O1_actual); // bad object
never@2950	2256	__ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O3_scratch);
never@2950	2257	__ delayed()->mov(Bytecodes::_aaload, O0_code); // who is complaining?
never@2950	2258
never@2950	2259	__ bind(L_bad_array_length);
never@2950	2260	assert(!vmarg.uses(O2_required), "must be different registers");
never@2950	2261	__ mov( G3_method_handle, O2_required); // required class
never@2950	2262	__ ld_ptr(vmarg, O1_actual); // bad object
never@2950	2263	__ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O3_scratch);
never@2950	2264	__ delayed()->mov(Bytecodes::_arraylength, O0_code); // who is complaining?
never@2950	2265	}
twisti@1858	2266	break;
twisti@1858	2267
twisti@1858	2268	default:
never@2950	2269	DEBUG_ONLY(tty->print_cr("bad ek=%d (%s)", (int)ek, entry_name(ek)));
twisti@1858	2270	ShouldNotReachHere();
twisti@1858	2271	}
never@2950	2272	BLOCK_COMMENT(err_msg("} Entry %s", entry_name(ek)));
twisti@1858	2273
twisti@1858	2274	address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
twisti@1858	2275	__ unimplemented(entry_name(ek)); // %%% FIXME: NYI
twisti@1858	2276
twisti@1858	2277	init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
jrose@1145	2278	}