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src/cpu/sparc/vm/methodHandles_sparc.cpp@cba7b5c2d53f (annotated)

src/cpu/sparc/vm/methodHandles_sparc.cpp

Fri, 03 Jun 2011 22:31:43 -0700

author

never

date

Fri, 03 Jun 2011 22:31:43 -0700

changeset 2950

cba7b5c2d53f

parent 2903

fabcf26ee72f

child 2954

f8c9417e3571

permissions

-rw-r--r--

7045514: SPARC assembly code for JSR 292 ricochet frames
Reviewed-by: kvn, 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@2950	273	ARG_LIMIT = 255, SLOP = 35,
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);
never@2950	290	__ cmp(O7_temp, L0_magic_number_1);
never@2950	291	__ br(Assembler::equal, false, Assembler::pt, L_ok_1);
never@2950	292	__ delayed()->nop();
never@2950	293	__ stop("damaged ricochet frame: MAGIC_NUMBER_1 not found");
never@2950	294
never@2950	295	__ BIND(L_ok_1);
never@2950	296
never@2950	297	// Arguments pointer must look reasonable:
never@2950	298	#ifdef _LP64
never@2950	299	Register FP_temp = O5_temp;
never@2950	300	__ add(FP, STACK_BIAS, FP_temp);
never@2950	301	#else
never@2950	302	Register FP_temp = FP;
never@2950	303	#endif
never@2950	304	__ cmp(L4_saved_args_base, FP_temp);
never@2950	305	__ br(Assembler::greaterEqualUnsigned, false, Assembler::pt, L_ok_2);
never@2950	306	__ delayed()->nop();
never@2950	307	__ stop("damaged ricochet frame: L4 < FP");
never@2950	308
never@2950	309	__ BIND(L_ok_2);
never@2950	310	__ sub(L4_saved_args_base, UNREASONABLE_STACK_MOVE * Interpreter::stackElementSize, O7_temp);
never@2950	311	__ cmp(O7_temp, FP_temp);
never@2950	312	__ br(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok_3);
never@2950	313	__ delayed()->nop();
never@2950	314	__ stop("damaged ricochet frame: (L4 - UNREASONABLE_STACK_MOVE) > FP");
never@2950	315
never@2950	316	__ BIND(L_ok_3);
never@2950	317	extract_conversion_dest_type(_masm, L5_conversion, O7_temp);
never@2950	318	__ cmp(O7_temp, T_VOID);
never@2950	319	__ br(Assembler::equal, false, Assembler::pt, L_ok_4);
never@2950	320	__ delayed()->nop();
never@2950	321	extract_conversion_vminfo(_masm, L5_conversion, O5_temp);
never@2950	322	__ ld_ptr(L4_saved_args_base, __ argument_offset(O5_temp, O5_temp), O7_temp);
never@2950	323	assert(__ is_simm13(RETURN_VALUE_PLACEHOLDER), "must be simm13");
never@2950	324	__ cmp(O7_temp, (int32_t) RETURN_VALUE_PLACEHOLDER);
never@2950	325	__ brx(Assembler::equal, false, Assembler::pt, L_ok_4);
never@2950	326	__ delayed()->nop();
never@2950	327	__ stop("damaged ricochet frame: RETURN_VALUE_PLACEHOLDER not found");
never@2950	328	__ BIND(L_ok_4);
never@2950	329	BLOCK_COMMENT("} verify_clean");
never@2950	330	}
never@2950	331	#endif //ASSERT
never@2950	332
never@2950	333	void MethodHandles::load_klass_from_Class(MacroAssembler* _masm, Register klass_reg, Register temp_reg, Register temp2_reg) {
never@2950	334	if (VerifyMethodHandles)
never@2950	335	verify_klass(_masm, klass_reg, SystemDictionaryHandles::Class_klass(), temp_reg, temp2_reg,
never@2950	336	"AMH argument is a Class");
never@2950	337	__ load_heap_oop(Address(klass_reg, java_lang_Class::klass_offset_in_bytes()), klass_reg);
never@2950	338	}
never@2950	339
never@2950	340	void MethodHandles::load_conversion_vminfo(MacroAssembler* _masm, Address conversion_field_addr, Register reg) {
never@2950	341	assert(CONV_VMINFO_SHIFT == 0, "preshifted");
never@2950	342	assert(CONV_VMINFO_MASK == right_n_bits(BitsPerByte), "else change type of following load");
never@2950	343	__ ldub(conversion_field_addr.plus_disp(BytesPerInt - 1), reg);
never@2950	344	}
never@2950	345
never@2950	346	void MethodHandles::extract_conversion_vminfo(MacroAssembler* _masm, Register conversion_field_reg, Register reg) {
never@2950	347	assert(CONV_VMINFO_SHIFT == 0, "preshifted");
never@2950	348	__ and3(conversion_field_reg, CONV_VMINFO_MASK, reg);
never@2950	349	}
never@2950	350
never@2950	351	void MethodHandles::extract_conversion_dest_type(MacroAssembler* _masm, Register conversion_field_reg, Register reg) {
never@2950	352	__ srl(conversion_field_reg, CONV_DEST_TYPE_SHIFT, reg);
never@2950	353	__ and3(reg, 0x0F, reg);
never@2950	354	}
never@2950	355
never@2950	356	void MethodHandles::load_stack_move(MacroAssembler* _masm,
never@2950	357	Address G3_amh_conversion,
never@2950	358	Register stack_move_reg) {
never@2950	359	BLOCK_COMMENT("load_stack_move {");
never@2950	360	__ ldsw(G3_amh_conversion, stack_move_reg);
never@2950	361	__ sra(stack_move_reg, CONV_STACK_MOVE_SHIFT, stack_move_reg);
never@2950	362	if (VerifyMethodHandles) {
never@2950	363	Label L_ok, L_bad;
never@2950	364	int32_t stack_move_limit = 0x0800; // extra-large
never@2950	365	__ cmp(stack_move_reg, stack_move_limit);
never@2950	366	__ br(Assembler::greaterEqual, false, Assembler::pn, L_bad);
never@2950	367	__ delayed()->nop();
never@2950	368	__ cmp(stack_move_reg, -stack_move_limit);
never@2950	369	__ br(Assembler::greater, false, Assembler::pt, L_ok);
never@2950	370	__ delayed()->nop();
never@2950	371	__ BIND(L_bad);
never@2950	372	__ stop("load_stack_move of garbage value");
never@2950	373	__ BIND(L_ok);
never@2950	374	}
never@2950	375	BLOCK_COMMENT("} load_stack_move");
never@2950	376	}
never@2950	377
never@2950	378	#ifdef ASSERT
never@2950	379	void MethodHandles::RicochetFrame::verify() const {
never@2950	380	assert(magic_number_1() == MAGIC_NUMBER_1, "");
never@2950	381	if (!Universe::heap()->is_gc_active()) {
never@2950	382	if (saved_args_layout() != NULL) {
never@2950	383	assert(saved_args_layout()->is_method(), "must be valid oop");
never@2950	384	}
never@2950	385	if (saved_target() != NULL) {
never@2950	386	assert(java_lang_invoke_MethodHandle::is_instance(saved_target()), "checking frame value");
never@2950	387	}
never@2950	388	}
never@2950	389	int conv_op = adapter_conversion_op(conversion());
never@2950	390	assert(conv_op == java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS ||
never@2950	391	conv_op == java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS ||
never@2950	392	conv_op == java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF,
never@2950	393	"must be a sane conversion");
never@2950	394	if (has_return_value_slot()) {
never@2950	395	assert(*return_value_slot_addr() == RETURN_VALUE_PLACEHOLDER, "");
never@2950	396	}
never@2950	397	}
never@2950	398
never@2950	399	void MethodHandles::verify_argslot(MacroAssembler* _masm, Register argslot_reg, Register temp_reg, const char* error_message) {
never@2950	400	// Verify that argslot lies within (Gargs, FP].
never@2950	401	Label L_ok, L_bad;
never@2950	402	BLOCK_COMMENT("verify_argslot {");
never@2950	403	__ add(FP, STACK_BIAS, temp_reg); // STACK_BIAS is zero on !_LP64
never@2950	404	__ cmp(argslot_reg, temp_reg);
never@2950	405	__ brx(Assembler::greaterUnsigned, false, Assembler::pn, L_bad);
never@2950	406	__ delayed()->nop();
never@2950	407	__ cmp(Gargs, argslot_reg);
never@2950	408	__ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok);
never@2950	409	__ delayed()->nop();
never@2950	410	__ BIND(L_bad);
never@2950	411	__ stop(error_message);
never@2950	412	__ BIND(L_ok);
never@2950	413	BLOCK_COMMENT("} verify_argslot");
never@2950	414	}
never@2950	415
never@2950	416	void MethodHandles::verify_argslots(MacroAssembler* _masm,
never@2950	417	RegisterOrConstant arg_slots,
never@2950	418	Register arg_slot_base_reg,
never@2950	419	Register temp_reg,
never@2950	420	Register temp2_reg,
never@2950	421	bool negate_argslots,
never@2950	422	const char* error_message) {
never@2950	423	// Verify that [argslot..argslot+size) lies within (Gargs, FP).
never@2950	424	Label L_ok, L_bad;
never@2950	425	BLOCK_COMMENT("verify_argslots {");
never@2950	426	if (negate_argslots) {
never@2950	427	if (arg_slots.is_constant()) {
never@2950	428	arg_slots = -1 * arg_slots.as_constant();
never@2950	429	} else {
never@2950	430	__ neg(arg_slots.as_register(), temp_reg);
never@2950	431	arg_slots = temp_reg;
never@2950	432	}
never@2950	433	}
never@2950	434	__ add(arg_slot_base_reg, __ argument_offset(arg_slots, temp_reg), temp_reg);
never@2950	435	__ add(FP, STACK_BIAS, temp2_reg); // STACK_BIAS is zero on !_LP64
never@2950	436	__ cmp(temp_reg, temp2_reg);
never@2950	437	__ brx(Assembler::greaterUnsigned, false, Assembler::pn, L_bad);
never@2950	438	__ delayed()->nop();
never@2950	439	// Gargs points to the first word so adjust by BytesPerWord
never@2950	440	__ add(arg_slot_base_reg, BytesPerWord, temp_reg);
never@2950	441	__ cmp(Gargs, temp_reg);
never@2950	442	__ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok);
never@2950	443	__ delayed()->nop();
never@2950	444	__ BIND(L_bad);
never@2950	445	__ stop(error_message);
never@2950	446	__ BIND(L_ok);
never@2950	447	BLOCK_COMMENT("} verify_argslots");
never@2950	448	}
never@2950	449
never@2950	450	// Make sure that arg_slots has the same sign as the given direction.
never@2950	451	// If (and only if) arg_slots is a assembly-time constant, also allow it to be zero.
never@2950	452	void MethodHandles::verify_stack_move(MacroAssembler* _masm,
never@2950	453	RegisterOrConstant arg_slots, int direction) {
never@2950	454	enum { UNREASONABLE_STACK_MOVE = 256 * 4 }; // limit of 255 arguments
never@2950	455	bool allow_zero = arg_slots.is_constant();
never@2950	456	if (direction == 0) { direction = +1; allow_zero = true; }
never@2950	457	assert(stack_move_unit() == -1, "else add extra checks here");
never@2950	458	if (arg_slots.is_register()) {
never@2950	459	Label L_ok, L_bad;
never@2950	460	BLOCK_COMMENT("verify_stack_move {");
never@2950	461	// __ btst(-stack_move_unit() - 1, arg_slots.as_register()); // no need
never@2950	462	// __ br(Assembler::notZero, false, Assembler::pn, L_bad);
never@2950	463	// __ delayed()->nop();
never@2950	464	__ cmp(arg_slots.as_register(), (int32_t) NULL_WORD);
never@2950	465	if (direction > 0) {
never@2950	466	__ br(allow_zero ? Assembler::less : Assembler::lessEqual, false, Assembler::pn, L_bad);
never@2950	467	__ delayed()->nop();
never@2950	468	__ cmp(arg_slots.as_register(), (int32_t) UNREASONABLE_STACK_MOVE);
never@2950	469	__ br(Assembler::less, false, Assembler::pn, L_ok);
never@2950	470	__ delayed()->nop();
never@2950	471	} else {
never@2950	472	__ br(allow_zero ? Assembler::greater : Assembler::greaterEqual, false, Assembler::pn, L_bad);
never@2950	473	__ delayed()->nop();
never@2950	474	__ cmp(arg_slots.as_register(), (int32_t) -UNREASONABLE_STACK_MOVE);
never@2950	475	__ br(Assembler::greater, false, Assembler::pn, L_ok);
never@2950	476	__ delayed()->nop();
never@2950	477	}
never@2950	478	__ BIND(L_bad);
never@2950	479	if (direction > 0)
never@2950	480	__ stop("assert arg_slots > 0");
never@2950	481	else
never@2950	482	__ stop("assert arg_slots < 0");
never@2950	483	__ BIND(L_ok);
never@2950	484	BLOCK_COMMENT("} verify_stack_move");
never@2950	485	} else {
never@2950	486	intptr_t size = arg_slots.as_constant();
never@2950	487	if (direction < 0) size = -size;
never@2950	488	assert(size >= 0, "correct direction of constant move");
never@2950	489	assert(size < UNREASONABLE_STACK_MOVE, "reasonable size of constant move");
never@2950	490	}
never@2950	491	}
never@2950	492
never@2950	493	void MethodHandles::verify_klass(MacroAssembler* _masm,
never@2950	494	Register obj_reg, KlassHandle klass,
never@2950	495	Register temp_reg, Register temp2_reg,
never@2950	496	const char* error_message) {
never@2950	497	oop* klass_addr = klass.raw_value();
never@2950	498	assert(klass_addr >= SystemDictionaryHandles::Object_klass().raw_value() &&
never@2950	499	klass_addr <= SystemDictionaryHandles::Long_klass().raw_value(),
never@2950	500	"must be one of the SystemDictionaryHandles");
never@2950	501	Label L_ok, L_bad;
never@2950	502	BLOCK_COMMENT("verify_klass {");
never@2950	503	__ verify_oop(obj_reg);
never@2950	504	__ br_null(obj_reg, false, Assembler::pn, L_bad);
never@2950	505	__ delayed()->nop();
never@2950	506	__ load_klass(obj_reg, temp_reg);
never@2950	507	__ set(ExternalAddress(klass_addr), temp2_reg);
never@2950	508	__ ld_ptr(Address(temp2_reg, 0), temp2_reg);
never@2950	509	__ cmp(temp_reg, temp2_reg);
never@2950	510	__ brx(Assembler::equal, false, Assembler::pt, L_ok);
never@2950	511	__ delayed()->nop();
never@2950	512	intptr_t super_check_offset = klass->super_check_offset();
never@2950	513	__ ld_ptr(Address(temp_reg, super_check_offset), temp_reg);
never@2950	514	__ set(ExternalAddress(klass_addr), temp2_reg);
never@2950	515	__ ld_ptr(Address(temp2_reg, 0), temp2_reg);
never@2950	516	__ cmp(temp_reg, temp2_reg);
never@2950	517	__ brx(Assembler::equal, false, Assembler::pt, L_ok);
never@2950	518	__ delayed()->nop();
never@2950	519	__ BIND(L_bad);
never@2950	520	__ stop(error_message);
never@2950	521	__ BIND(L_ok);
never@2950	522	BLOCK_COMMENT("} verify_klass");
never@2950	523	}
never@2950	524	#endif // ASSERT
jrose@1145	525
jrose@1145	526	// Code generation
jrose@1145	527	address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) {
twisti@2271	528	// I5_savedSP/O5_savedSP: sender SP (must preserve)
twisti@1858	529	// G4 (Gargs): incoming argument list (must preserve)
twisti@2271	530	// G5_method: invoke methodOop
twisti@1858	531	// G3_method_handle: receiver method handle (must load from sp[MethodTypeForm.vmslots])
twisti@2271	532	// O0, O1, O2, O3, O4: garbage temps, blown away
twisti@2271	533	Register O0_mtype = O0;
twisti@1858	534	Register O1_scratch = O1;
jrose@2266	535	Register O2_scratch = O2;
jrose@2266	536	Register O3_scratch = O3;
twisti@2271	537	Register O4_argslot = O4;
jrose@2266	538	Register O4_argbase = O4;
twisti@1858	539
twisti@1858	540	// emit WrongMethodType path first, to enable back-branch from main path
twisti@1858	541	Label wrong_method_type;
twisti@1858	542	__ bind(wrong_method_type);
jrose@2266	543	Label invoke_generic_slow_path;
jrose@2266	544	assert(methodOopDesc::intrinsic_id_size_in_bytes() == sizeof(u1), "");;
jrose@2266	545	__ ldub(Address(G5_method, methodOopDesc::intrinsic_id_offset_in_bytes()), O1_scratch);
jrose@2266	546	__ cmp(O1_scratch, (int) vmIntrinsics::_invokeExact);
jrose@2266	547	__ brx(Assembler::notEqual, false, Assembler::pt, invoke_generic_slow_path);
jrose@2266	548	__ delayed()->nop();
twisti@2271	549	__ mov(O0_mtype, G5_method_type); // required by throw_WrongMethodType
jrose@2266	550	// mov(G3_method_handle, G3_method_handle); // already in this register
twisti@1858	551	__ jump_to(AddressLiteral(Interpreter::throw_WrongMethodType_entry()), O1_scratch);
twisti@1858	552	__ delayed()->nop();
twisti@1858	553
twisti@1858	554	// here's where control starts out:
twisti@1858	555	__ align(CodeEntryAlignment);
twisti@1858	556	address entry_point = __ pc();
twisti@1858	557
jrose@2266	558	// fetch the MethodType from the method handle
never@2950	559	// FIXME: Interpreter should transmit pre-popped stack pointer, to locate base of arg list.
never@2950	560	// This would simplify several touchy bits of code.
never@2950	561	// See 6984712: JSR 292 method handle calls need a clean argument base pointer
twisti@1858	562	{
twisti@1858	563	Register tem = G5_method;
twisti@1858	564	for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) {
twisti@2271	565	__ ld_ptr(Address(tem, *pchase), O0_mtype);
twisti@2271	566	tem = O0_mtype; // in case there is another indirection
twisti@1858	567	}
twisti@1858	568	}
twisti@1858	569
twisti@1858	570	// given the MethodType, find out where the MH argument is buried
jrose@2639	571	__ load_heap_oop(Address(O0_mtype, __ delayed_value(java_lang_invoke_MethodType::form_offset_in_bytes, O1_scratch)), O4_argslot);
jrose@2639	572	__ ldsw( Address(O4_argslot, __ delayed_value(java_lang_invoke_MethodTypeForm::vmslots_offset_in_bytes, O1_scratch)), O4_argslot);
never@2950	573	__ add(__ argument_address(O4_argslot, O4_argslot, 1), O4_argbase);
jrose@2266	574	// Note: argument_address uses its input as a scratch register!
never@2950	575	Address mh_receiver_slot_addr(O4_argbase, -Interpreter::stackElementSize);
never@2950	576	__ ld_ptr(mh_receiver_slot_addr, G3_method_handle);
twisti@1858	577
jrose@2266	578	trace_method_handle(_masm, "invokeExact");
jrose@2266	579
twisti@2271	580	__ check_method_handle_type(O0_mtype, G3_method_handle, O1_scratch, wrong_method_type);
never@2950	581
never@2950	582	// Nobody uses the MH receiver slot after this. Make sure.
never@2950	583	DEBUG_ONLY(__ set((int32_t) 0x999999, O1_scratch); __ st_ptr(O1_scratch, mh_receiver_slot_addr));
never@2950	584
twisti@1858	585	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	586
jrose@2266	587	// for invokeGeneric (only), apply argument and result conversions on the fly
jrose@2266	588	__ bind(invoke_generic_slow_path);
jrose@2266	589	#ifdef ASSERT
never@2950	590	if (VerifyMethodHandles) {
never@2950	591	Label L;
jrose@2266	592	__ ldub(Address(G5_method, methodOopDesc::intrinsic_id_offset_in_bytes()), O1_scratch);
jrose@2266	593	__ cmp(O1_scratch, (int) vmIntrinsics::_invokeGeneric);
jrose@2266	594	__ brx(Assembler::equal, false, Assembler::pt, L);
jrose@2266	595	__ delayed()->nop();
jrose@2266	596	__ stop("bad methodOop::intrinsic_id");
jrose@2266	597	__ bind(L);
jrose@2266	598	}
jrose@2266	599	#endif //ASSERT
jrose@2266	600
jrose@2266	601	// make room on the stack for another pointer:
never@2950	602	insert_arg_slots(_masm, 2 * stack_move_unit(), O4_argbase, O1_scratch, O2_scratch, O3_scratch);
jrose@2266	603	// load up an adapter from the calling type (Java weaves this)
jrose@2266	604	Register O2_form = O2_scratch;
jrose@2266	605	Register O3_adapter = O3_scratch;
jrose@2639	606	__ load_heap_oop(Address(O0_mtype, __ delayed_value(java_lang_invoke_MethodType::form_offset_in_bytes, O1_scratch)), O2_form);
twisti@2903	607	__ load_heap_oop(Address(O2_form, __ delayed_value(java_lang_invoke_MethodTypeForm::genericInvoker_offset_in_bytes, O1_scratch)), O3_adapter);
twisti@2903	608	__ verify_oop(O3_adapter);
jrose@2266	609	__ st_ptr(O3_adapter, Address(O4_argbase, 1 * Interpreter::stackElementSize));
jrose@2266	610	// As a trusted first argument, pass the type being called, so the adapter knows
jrose@2266	611	// the actual types of the arguments and return values.
jrose@2266	612	// (Generic invokers are shared among form-families of method-type.)
twisti@2271	613	__ st_ptr(O0_mtype, Address(O4_argbase, 0 * Interpreter::stackElementSize));
jrose@2266	614	// FIXME: assert that O3_adapter is of the right method-type.
jrose@2266	615	__ mov(O3_adapter, G3_method_handle);
jrose@2266	616	trace_method_handle(_masm, "invokeGeneric");
jrose@2266	617	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
jrose@2266	618
twisti@1858	619	return entry_point;
jrose@1145	620	}
jrose@1145	621
never@2950	622	// Workaround for C++ overloading nastiness on '0' for RegisterOrConstant.
never@2950	623	static RegisterOrConstant constant(int value) {
never@2950	624	return RegisterOrConstant(value);
never@2950	625	}
twisti@1858	626
never@2950	627	static void load_vmargslot(MacroAssembler* _masm, Address vmargslot_addr, Register result) {
never@2950	628	__ ldsw(vmargslot_addr, result);
never@2950	629	}
never@2950	630
never@2950	631	static RegisterOrConstant adjust_SP_and_Gargs_down_by_slots(MacroAssembler* _masm,
never@2950	632	RegisterOrConstant arg_slots,
never@2950	633	Register temp_reg, Register temp2_reg) {
never@2950	634	// Keep the stack pointer 2*wordSize aligned.
never@2950	635	const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
never@2950	636	if (arg_slots.is_constant()) {
never@2950	637	const int offset = arg_slots.as_constant() << LogBytesPerWord;
never@2950	638	const int masked_offset = round_to(offset, 2 * BytesPerWord);
never@2950	639	const int masked_offset2 = (offset + 1*BytesPerWord) & ~TwoWordAlignmentMask;
never@2950	640	assert(masked_offset == masked_offset2, "must agree");
never@2950	641	__ sub(Gargs, offset, Gargs);
never@2950	642	__ sub(SP, masked_offset, SP );
never@2950	643	return offset;
never@2950	644	} else {
twisti@1858	645	#ifdef ASSERT
never@2950	646	{
never@2950	647	Label L_ok;
never@2950	648	__ cmp(arg_slots.as_register(), 0);
never@2950	649	__ br(Assembler::greaterEqual, false, Assembler::pt, L_ok);
never@2950	650	__ delayed()->nop();
never@2950	651	__ stop("negative arg_slots");
never@2950	652	__ bind(L_ok);
never@2950	653	}
twisti@1858	654	#endif
never@2950	655	__ sll_ptr(arg_slots.as_register(), LogBytesPerWord, temp_reg);
never@2950	656	__ add( temp_reg, 1*BytesPerWord, temp2_reg);
never@2950	657	__ andn(temp2_reg, TwoWordAlignmentMask, temp2_reg);
never@2950	658	__ sub(Gargs, temp_reg, Gargs);
never@2950	659	__ sub(SP, temp2_reg, SP );
never@2950	660	return temp_reg;
never@2950	661	}
twisti@1858	662	}
twisti@1858	663
never@2950	664	static RegisterOrConstant adjust_SP_and_Gargs_up_by_slots(MacroAssembler* _masm,
never@2950	665	RegisterOrConstant arg_slots,
never@2950	666	Register temp_reg, Register temp2_reg) {
never@2950	667	// Keep the stack pointer 2*wordSize aligned.
never@2950	668	const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
never@2950	669	if (arg_slots.is_constant()) {
never@2950	670	const int offset = arg_slots.as_constant() << LogBytesPerWord;
never@2950	671	const int masked_offset = offset & ~TwoWordAlignmentMask;
never@2950	672	__ add(Gargs, offset, Gargs);
never@2950	673	__ add(SP, masked_offset, SP );
never@2950	674	return offset;
never@2950	675	} else {
never@2950	676	__ sll_ptr(arg_slots.as_register(), LogBytesPerWord, temp_reg);
never@2950	677	__ andn(temp_reg, TwoWordAlignmentMask, temp2_reg);
never@2950	678	__ add(Gargs, temp_reg, Gargs);
never@2950	679	__ add(SP, temp2_reg, SP );
never@2950	680	return temp_reg;
never@2950	681	}
never@2950	682	}
twisti@1858	683
twisti@1858	684	// Helper to insert argument slots into the stack.
never@2950	685	// arg_slots must be a multiple of stack_move_unit() and < 0
never@2950	686	// argslot_reg is decremented to point to the new (shifted) location of the argslot
never@2950	687	// But, temp_reg ends up holding the original value of argslot_reg.
twisti@1858	688	void MethodHandles::insert_arg_slots(MacroAssembler* _masm,
twisti@1858	689	RegisterOrConstant arg_slots,
twisti@1858	690	Register argslot_reg,
twisti@1858	691	Register temp_reg, Register temp2_reg, Register temp3_reg) {
never@2950	692	// allow constant zero
never@2950	693	if (arg_slots.is_constant() && arg_slots.as_constant() == 0)
never@2950	694	return;
never@2950	695
twisti@1858	696	assert_different_registers(argslot_reg, temp_reg, temp2_reg, temp3_reg,
twisti@1858	697	(!arg_slots.is_register() ? Gargs : arg_slots.as_register()));
twisti@1858	698
never@2950	699	BLOCK_COMMENT("insert_arg_slots {");
never@2950	700	if (VerifyMethodHandles)
never@2950	701	verify_argslot(_masm, argslot_reg, temp_reg, "insertion point must fall within current frame");
never@2950	702	if (VerifyMethodHandles)
never@2950	703	verify_stack_move(_masm, arg_slots, -1);
twisti@1858	704
twisti@1858	705	// Make space on the stack for the inserted argument(s).
twisti@1858	706	// Then pull down everything shallower than argslot_reg.
twisti@1858	707	// The stacked return address gets pulled down with everything else.
twisti@1858	708	// That is, copy [sp, argslot) downward by -size words. In pseudo-code:
twisti@1858	709	// sp -= size;
twisti@1858	710	// for (temp = sp + size; temp < argslot; temp++)
twisti@1858	711	// temp[-size] = temp[0]
twisti@1858	712	// argslot -= size;
twisti@1858	713
never@2950	714	// offset is temp3_reg in case of arg_slots being a register.
never@2950	715	RegisterOrConstant offset = adjust_SP_and_Gargs_up_by_slots(_masm, arg_slots, temp3_reg, temp_reg);
never@2950	716	__ sub(Gargs, offset, temp_reg); // source pointer for copy
twisti@1858	717
twisti@1858	718	{
twisti@1858	719	Label loop;
twisti@2204	720	__ BIND(loop);
twisti@1858	721	// pull one word down each time through the loop
never@2950	722	__ ld_ptr( Address(temp_reg, 0 ), temp2_reg);
never@2950	723	__ st_ptr(temp2_reg, Address(temp_reg, offset) );
twisti@1858	724	__ add(temp_reg, wordSize, temp_reg);
twisti@1858	725	__ cmp(temp_reg, argslot_reg);
never@2950	726	__ brx(Assembler::lessUnsigned, false, Assembler::pt, loop);
twisti@1858	727	__ delayed()->nop(); // FILLME
twisti@1858	728	}
twisti@1858	729
twisti@1858	730	// Now move the argslot down, to point to the opened-up space.
twisti@1858	731	__ add(argslot_reg, offset, argslot_reg);
twisti@2204	732	BLOCK_COMMENT("} insert_arg_slots");
twisti@1858	733	}
twisti@1858	734
twisti@1858	735
twisti@1858	736	// Helper to remove argument slots from the stack.
never@2950	737	// arg_slots must be a multiple of stack_move_unit() and > 0
twisti@1858	738	void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
twisti@1858	739	RegisterOrConstant arg_slots,
twisti@1858	740	Register argslot_reg,
twisti@1858	741	Register temp_reg, Register temp2_reg, Register temp3_reg) {
never@2950	742	// allow constant zero
never@2950	743	if (arg_slots.is_constant() && arg_slots.as_constant() == 0)
never@2950	744	return;
twisti@1858	745	assert_different_registers(argslot_reg, temp_reg, temp2_reg, temp3_reg,
twisti@1858	746	(!arg_slots.is_register() ? Gargs : arg_slots.as_register()));
twisti@1858	747
never@2950	748	BLOCK_COMMENT("remove_arg_slots {");
never@2950	749	if (VerifyMethodHandles)
never@2950	750	verify_argslots(_masm, arg_slots, argslot_reg, temp_reg, temp2_reg, false,
never@2950	751	"deleted argument(s) must fall within current frame");
never@2950	752	if (VerifyMethodHandles)
never@2950	753	verify_stack_move(_masm, arg_slots, +1);
twisti@1858	754
twisti@1858	755	// Pull up everything shallower than argslot.
twisti@1858	756	// Then remove the excess space on the stack.
twisti@1858	757	// The stacked return address gets pulled up with everything else.
twisti@1858	758	// That is, copy [sp, argslot) upward by size words. In pseudo-code:
twisti@1858	759	// for (temp = argslot-1; temp >= sp; --temp)
twisti@1858	760	// temp[size] = temp[0]
twisti@1858	761	// argslot += size;
twisti@1858	762	// sp += size;
never@2950	763
never@2950	764	RegisterOrConstant offset = __ regcon_sll_ptr(arg_slots, LogBytesPerWord, temp3_reg);
twisti@1858	765	__ sub(argslot_reg, wordSize, temp_reg); // source pointer for copy
never@2950	766
twisti@1858	767	{
never@2950	768	Label L_loop;
never@2950	769	__ BIND(L_loop);
twisti@1858	770	// pull one word up each time through the loop
never@2950	771	__ ld_ptr( Address(temp_reg, 0 ), temp2_reg);
never@2950	772	__ st_ptr(temp2_reg, Address(temp_reg, offset) );
twisti@1858	773	__ sub(temp_reg, wordSize, temp_reg);
twisti@1858	774	__ cmp(temp_reg, Gargs);
never@2950	775	__ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, L_loop);
twisti@1858	776	__ delayed()->nop(); // FILLME
twisti@1858	777	}
twisti@1858	778
twisti@1858	779	// And adjust the argslot address to point at the deletion point.
twisti@1858	780	__ add(argslot_reg, offset, argslot_reg);
twisti@1858	781
never@2950	782	// We don't need the offset at this point anymore, just adjust SP and Gargs.
never@2950	783	(void) adjust_SP_and_Gargs_up_by_slots(_masm, arg_slots, temp3_reg, temp_reg);
never@2950	784
twisti@2204	785	BLOCK_COMMENT("} remove_arg_slots");
twisti@1858	786	}
twisti@1858	787
never@2950	788	// Helper to copy argument slots to the top of the stack.
never@2950	789	// The sequence starts with argslot_reg and is counted by slot_count
never@2950	790	// slot_count must be a multiple of stack_move_unit() and >= 0
never@2950	791	// This function blows the temps but does not change argslot_reg.
never@2950	792	void MethodHandles::push_arg_slots(MacroAssembler* _masm,
never@2950	793	Register argslot_reg,
never@2950	794	RegisterOrConstant slot_count,
never@2950	795	Register temp_reg, Register temp2_reg) {
never@2950	796	// allow constant zero
never@2950	797	if (slot_count.is_constant() && slot_count.as_constant() == 0)
never@2950	798	return;
never@2950	799	assert_different_registers(argslot_reg, temp_reg, temp2_reg,
never@2950	800	(!slot_count.is_register() ? Gargs : slot_count.as_register()),
never@2950	801	SP);
never@2950	802	assert(Interpreter::stackElementSize == wordSize, "else change this code");
never@2950	803
never@2950	804	BLOCK_COMMENT("push_arg_slots {");
never@2950	805	if (VerifyMethodHandles)
never@2950	806	verify_stack_move(_masm, slot_count, 0);
never@2950	807
never@2950	808	RegisterOrConstant offset = adjust_SP_and_Gargs_down_by_slots(_masm, slot_count, temp2_reg, temp_reg);
never@2950	809
never@2950	810	if (slot_count.is_constant()) {
never@2950	811	for (int i = slot_count.as_constant() - 1; i >= 0; i--) {
never@2950	812	__ ld_ptr( Address(argslot_reg, i * wordSize), temp_reg);
never@2950	813	__ st_ptr(temp_reg, Address(Gargs, i * wordSize));
never@2950	814	}
never@2950	815	} else {
never@2950	816	Label L_plural, L_loop, L_break;
never@2950	817	// Emit code to dynamically check for the common cases, zero and one slot.
never@2950	818	__ cmp(slot_count.as_register(), (int32_t) 1);
never@2950	819	__ br(Assembler::greater, false, Assembler::pn, L_plural);
never@2950	820	__ delayed()->nop();
never@2950	821	__ br(Assembler::less, false, Assembler::pn, L_break);
never@2950	822	__ delayed()->nop();
never@2950	823	__ ld_ptr( Address(argslot_reg, 0), temp_reg);
never@2950	824	__ st_ptr(temp_reg, Address(Gargs, 0));
never@2950	825	__ ba(false, L_break);
never@2950	826	__ delayed()->nop(); // FILLME
never@2950	827	__ BIND(L_plural);
never@2950	828
never@2950	829	// Loop for 2 or more:
never@2950	830	// top = &argslot[slot_count]
never@2950	831	// while (top > argslot) *(--Gargs) = *(--top)
never@2950	832	Register top_reg = temp_reg;
never@2950	833	__ add(argslot_reg, offset, top_reg);
never@2950	834	__ add(Gargs, offset, Gargs ); // move back up again so we can go down
never@2950	835	__ BIND(L_loop);
never@2950	836	__ sub(top_reg, wordSize, top_reg);
never@2950	837	__ sub(Gargs, wordSize, Gargs );
never@2950	838	__ ld_ptr( Address(top_reg, 0), temp2_reg);
never@2950	839	__ st_ptr(temp2_reg, Address(Gargs, 0));
never@2950	840	__ cmp(top_reg, argslot_reg);
never@2950	841	__ brx(Assembler::greaterUnsigned, false, Assembler::pt, L_loop);
never@2950	842	__ delayed()->nop(); // FILLME
never@2950	843	__ BIND(L_break);
never@2950	844	}
never@2950	845	BLOCK_COMMENT("} push_arg_slots");
never@2950	846	}
never@2950	847
never@2950	848	// in-place movement; no change to Gargs
never@2950	849	// blows temp_reg, temp2_reg
never@2950	850	void MethodHandles::move_arg_slots_up(MacroAssembler* _masm,
never@2950	851	Register bottom_reg, // invariant
never@2950	852	Address top_addr, // can use temp_reg
never@2950	853	RegisterOrConstant positive_distance_in_slots, // destroyed if register
never@2950	854	Register temp_reg, Register temp2_reg) {
never@2950	855	assert_different_registers(bottom_reg,
never@2950	856	temp_reg, temp2_reg,
never@2950	857	positive_distance_in_slots.register_or_noreg());
never@2950	858	BLOCK_COMMENT("move_arg_slots_up {");
never@2950	859	Label L_loop, L_break;
never@2950	860	Register top_reg = temp_reg;
never@2950	861	if (!top_addr.is_same_address(Address(top_reg, 0))) {
never@2950	862	__ add(top_addr, top_reg);
never@2950	863	}
never@2950	864	// Detect empty (or broken) loop:
never@2950	865	#ifdef ASSERT
never@2950	866	if (VerifyMethodHandles) {
never@2950	867	// Verify that &bottom < &top (non-empty interval)
never@2950	868	Label L_ok, L_bad;
never@2950	869	if (positive_distance_in_slots.is_register()) {
never@2950	870	__ cmp(positive_distance_in_slots.as_register(), (int32_t) 0);
never@2950	871	__ br(Assembler::lessEqual, false, Assembler::pn, L_bad);
never@2950	872	__ delayed()->nop();
never@2950	873	}
never@2950	874	__ cmp(bottom_reg, top_reg);
never@2950	875	__ brx(Assembler::lessUnsigned, false, Assembler::pt, L_ok);
never@2950	876	__ delayed()->nop();
never@2950	877	__ BIND(L_bad);
never@2950	878	__ stop("valid bounds (copy up)");
never@2950	879	__ BIND(L_ok);
never@2950	880	}
never@2950	881	#endif
never@2950	882	__ cmp(bottom_reg, top_reg);
never@2950	883	__ brx(Assembler::greaterEqualUnsigned, false, Assembler::pn, L_break);
never@2950	884	__ delayed()->nop();
never@2950	885	// work top down to bottom, copying contiguous data upwards
never@2950	886	// In pseudo-code:
never@2950	887	// while (--top >= bottom) *(top + distance) = *(top + 0);
never@2950	888	RegisterOrConstant offset = __ argument_offset(positive_distance_in_slots, positive_distance_in_slots.register_or_noreg());
never@2950	889	__ BIND(L_loop);
never@2950	890	__ sub(top_reg, wordSize, top_reg);
never@2950	891	__ ld_ptr( Address(top_reg, 0 ), temp2_reg);
never@2950	892	__ st_ptr(temp2_reg, Address(top_reg, offset) );
never@2950	893	__ cmp(top_reg, bottom_reg);
never@2950	894	__ brx(Assembler::greaterUnsigned, false, Assembler::pt, L_loop);
never@2950	895	__ delayed()->nop(); // FILLME
never@2950	896	assert(Interpreter::stackElementSize == wordSize, "else change loop");
never@2950	897	__ BIND(L_break);
never@2950	898	BLOCK_COMMENT("} move_arg_slots_up");
never@2950	899	}
never@2950	900
never@2950	901	// in-place movement; no change to rsp
never@2950	902	// blows temp_reg, temp2_reg
never@2950	903	void MethodHandles::move_arg_slots_down(MacroAssembler* _masm,
never@2950	904	Address bottom_addr, // can use temp_reg
never@2950	905	Register top_reg, // invariant
never@2950	906	RegisterOrConstant negative_distance_in_slots, // destroyed if register
never@2950	907	Register temp_reg, Register temp2_reg) {
never@2950	908	assert_different_registers(top_reg,
never@2950	909	negative_distance_in_slots.register_or_noreg(),
never@2950	910	temp_reg, temp2_reg);
never@2950	911	BLOCK_COMMENT("move_arg_slots_down {");
never@2950	912	Label L_loop, L_break;
never@2950	913	Register bottom_reg = temp_reg;
never@2950	914	if (!bottom_addr.is_same_address(Address(bottom_reg, 0))) {
never@2950	915	__ add(bottom_addr, bottom_reg);
never@2950	916	}
never@2950	917	// Detect empty (or broken) loop:
never@2950	918	#ifdef ASSERT
never@2950	919	assert(!negative_distance_in_slots.is_constant() || negative_distance_in_slots.as_constant() < 0, "");
never@2950	920	if (VerifyMethodHandles) {
never@2950	921	// Verify that &bottom < &top (non-empty interval)
never@2950	922	Label L_ok, L_bad;
never@2950	923	if (negative_distance_in_slots.is_register()) {
never@2950	924	__ cmp(negative_distance_in_slots.as_register(), (int32_t) 0);
never@2950	925	__ br(Assembler::greaterEqual, false, Assembler::pn, L_bad);
never@2950	926	__ delayed()->nop();
never@2950	927	}
never@2950	928	__ cmp(bottom_reg, top_reg);
never@2950	929	__ brx(Assembler::lessUnsigned, false, Assembler::pt, L_ok);
never@2950	930	__ delayed()->nop();
never@2950	931	__ BIND(L_bad);
never@2950	932	__ stop("valid bounds (copy down)");
never@2950	933	__ BIND(L_ok);
never@2950	934	}
never@2950	935	#endif
never@2950	936	__ cmp(bottom_reg, top_reg);
never@2950	937	__ brx(Assembler::greaterEqualUnsigned, false, Assembler::pn, L_break);
never@2950	938	__ delayed()->nop();
never@2950	939	// work bottom up to top, copying contiguous data downwards
never@2950	940	// In pseudo-code:
never@2950	941	// while (bottom < top) *(bottom - distance) = *(bottom + 0), bottom++;
never@2950	942	RegisterOrConstant offset = __ argument_offset(negative_distance_in_slots, negative_distance_in_slots.register_or_noreg());
never@2950	943	__ BIND(L_loop);
never@2950	944	__ ld_ptr( Address(bottom_reg, 0 ), temp2_reg);
never@2950	945	__ st_ptr(temp2_reg, Address(bottom_reg, offset) );
never@2950	946	__ add(bottom_reg, wordSize, bottom_reg);
never@2950	947	__ cmp(bottom_reg, top_reg);
never@2950	948	__ brx(Assembler::lessUnsigned, false, Assembler::pt, L_loop);
never@2950	949	__ delayed()->nop(); // FILLME
never@2950	950	assert(Interpreter::stackElementSize == wordSize, "else change loop");
never@2950	951	__ BIND(L_break);
never@2950	952	BLOCK_COMMENT("} move_arg_slots_down");
never@2950	953	}
never@2950	954
never@2950	955	// Copy from a field or array element to a stacked argument slot.
never@2950	956	// is_element (ignored) says whether caller is loading an array element instead of an instance field.
never@2950	957	void MethodHandles::move_typed_arg(MacroAssembler* _masm,
never@2950	958	BasicType type, bool is_element,
never@2950	959	Address value_src, Address slot_dest,
never@2950	960	Register temp_reg) {
never@2950	961	assert(!slot_dest.uses(temp_reg), "must be different register");
never@2950	962	BLOCK_COMMENT(!is_element ? "move_typed_arg {" : "move_typed_arg { (array element)");
never@2950	963	if (type == T_OBJECT || type == T_ARRAY) {
never@2950	964	__ load_heap_oop(value_src, temp_reg);
never@2950	965	__ verify_oop(temp_reg);
never@2950	966	__ st_ptr(temp_reg, slot_dest);
never@2950	967	} else if (type != T_VOID) {
never@2950	968	int arg_size = type2aelembytes(type);
never@2950	969	bool arg_is_signed = is_signed_subword_type(type);
never@2950	970	int slot_size = is_subword_type(type) ? type2aelembytes(T_INT) : arg_size; // store int sub-words as int
never@2950	971	__ load_sized_value( value_src, temp_reg, arg_size, arg_is_signed);
never@2950	972	__ store_sized_value(temp_reg, slot_dest, slot_size );
never@2950	973	}
never@2950	974	BLOCK_COMMENT("} move_typed_arg");
never@2950	975	}
never@2950	976
never@2950	977	// Cf. TemplateInterpreterGenerator::generate_return_entry_for and
never@2950	978	// InterpreterMacroAssembler::save_return_value
never@2950	979	void MethodHandles::move_return_value(MacroAssembler* _masm, BasicType type,
never@2950	980	Address return_slot) {
never@2950	981	BLOCK_COMMENT("move_return_value {");
never@2950	982	// Look at the type and pull the value out of the corresponding register.
never@2950	983	if (type == T_VOID) {
never@2950	984	// nothing to do
never@2950	985	} else if (type == T_OBJECT) {
never@2950	986	__ verify_oop(O0);
never@2950	987	__ st_ptr(O0, return_slot);
never@2950	988	} else if (type == T_INT || is_subword_type(type)) {
never@2950	989	int type_size = type2aelembytes(T_INT);
never@2950	990	__ store_sized_value(O0, return_slot, type_size);
never@2950	991	} else if (type == T_LONG) {
never@2950	992	// store the value by parts
never@2950	993	// Note: We assume longs are continguous (if misaligned) on the interpreter stack.
never@2950	994	#if !defined(_LP64) && defined(COMPILER2)
never@2950	995	__ stx(G1, return_slot);
never@2950	996	#else
never@2950	997	#ifdef _LP64
never@2950	998	__ stx(O0, return_slot);
never@2950	999	#else
never@2950	1000	if (return_slot.has_disp()) {
never@2950	1001	// The displacement is a constant
never@2950	1002	__ st(O0, return_slot);
never@2950	1003	__ st(O1, return_slot.plus_disp(Interpreter::stackElementSize));
never@2950	1004	} else {
never@2950	1005	__ std(O0, return_slot);
never@2950	1006	}
never@2950	1007	#endif
never@2950	1008	#endif
never@2950	1009	} else if (type == T_FLOAT) {
never@2950	1010	__ stf(FloatRegisterImpl::S, Ftos_f, return_slot);
never@2950	1011	} else if (type == T_DOUBLE) {
never@2950	1012	__ stf(FloatRegisterImpl::D, Ftos_f, return_slot);
never@2950	1013	} else {
never@2950	1014	ShouldNotReachHere();
never@2950	1015	}
never@2950	1016	BLOCK_COMMENT("} move_return_value");
never@2950	1017	}
twisti@1858	1018
twisti@1858	1019	#ifndef PRODUCT
twisti@1858	1020	extern "C" void print_method_handle(oop mh);
twisti@1858	1021	void trace_method_handle_stub(const char* adaptername,
never@2868	1022	oopDesc* mh,
never@2868	1023	intptr_t* saved_sp) {
never@2950	1024	bool has_mh = (strstr(adaptername, "return/") == NULL); // return adapters don't have mh
never@2868	1025	tty->print_cr("MH %s mh="INTPTR_FORMAT " saved_sp=" INTPTR_FORMAT, adaptername, (intptr_t) mh, saved_sp);
never@2950	1026	if (has_mh)
never@2950	1027	print_method_handle(mh);
twisti@1858	1028	}
twisti@2204	1029	void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) {
twisti@2204	1030	if (!TraceMethodHandles) return;
twisti@2204	1031	BLOCK_COMMENT("trace_method_handle {");
twisti@2204	1032	// save: Gargs, O5_savedSP
twisti@2204	1033	__ save_frame(16);
twisti@2204	1034	__ set((intptr_t) adaptername, O0);
twisti@2204	1035	__ mov(G3_method_handle, O1);
never@2868	1036	__ mov(I5_savedSP, O2);
twisti@2204	1037	__ mov(G3_method_handle, L3);
twisti@2204	1038	__ mov(Gargs, L4);
twisti@2204	1039	__ mov(G5_method_type, L5);
twisti@2204	1040	__ call_VM_leaf(L7, CAST_FROM_FN_PTR(address, trace_method_handle_stub));
twisti@2204	1041
twisti@2204	1042	__ mov(L3, G3_method_handle);
twisti@2204	1043	__ mov(L4, Gargs);
twisti@2204	1044	__ mov(L5, G5_method_type);
twisti@2204	1045	__ restore();
twisti@2204	1046	BLOCK_COMMENT("} trace_method_handle");
twisti@2204	1047	}
twisti@1858	1048	#endif // PRODUCT
twisti@1858	1049
jrose@1862	1050	// which conversion op types are implemented here?
jrose@1862	1051	int MethodHandles::adapter_conversion_ops_supported_mask() {
jrose@2639	1052	return ((1<<java_lang_invoke_AdapterMethodHandle::OP_RETYPE_ONLY)
jrose@2639	1053	|(1<<java_lang_invoke_AdapterMethodHandle::OP_RETYPE_RAW)
jrose@2639	1054	|(1<<java_lang_invoke_AdapterMethodHandle::OP_CHECK_CAST)
jrose@2639	1055	|(1<<java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_PRIM)
jrose@2639	1056	|(1<<java_lang_invoke_AdapterMethodHandle::OP_REF_TO_PRIM)
never@2950	1057	// OP_PRIM_TO_REF is below...
jrose@2639	1058	|(1<<java_lang_invoke_AdapterMethodHandle::OP_SWAP_ARGS)
jrose@2639	1059	|(1<<java_lang_invoke_AdapterMethodHandle::OP_ROT_ARGS)
jrose@2639	1060	|(1<<java_lang_invoke_AdapterMethodHandle::OP_DUP_ARGS)
jrose@2639	1061	|(1<<java_lang_invoke_AdapterMethodHandle::OP_DROP_ARGS)
never@2950	1062	// OP_COLLECT_ARGS is below...
never@2950	1063	|(1<<java_lang_invoke_AdapterMethodHandle::OP_SPREAD_ARGS)
never@2950	1064	|(!UseRicochetFrames ? 0 :
never@2950	1065	java_lang_invoke_MethodTypeForm::vmlayout_offset_in_bytes() <= 0 ? 0 :
never@2950	1066	((1<<java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF)
never@2950	1067	|(1<<java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS)
never@2950	1068	|(1<<java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS)
never@2950	1069	)
never@2950	1070	)
jrose@1862	1071	);
jrose@1862	1072	}
twisti@1858	1073
twisti@1858	1074	//------------------------------------------------------------------------------
twisti@1858	1075	// MethodHandles::generate_method_handle_stub
twisti@1858	1076	//
jrose@1145	1077	// Generate an "entry" field for a method handle.
jrose@1145	1078	// This determines how the method handle will respond to calls.
twisti@2436	1079	void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
never@2950	1080	MethodHandles::EntryKind ek_orig = ek_original_kind(ek);
never@2950	1081
twisti@1858	1082	// Here is the register state during an interpreted call,
twisti@1858	1083	// as set up by generate_method_handle_interpreter_entry():
twisti@1858	1084	// - G5: garbage temp (was MethodHandle.invoke methodOop, unused)
twisti@1858	1085	// - G3: receiver method handle
twisti@1858	1086	// - O5_savedSP: sender SP (must preserve)
twisti@1858	1087
never@2950	1088	const Register O0_scratch = O0;
twisti@2411	1089	const Register O1_scratch = O1;
twisti@2411	1090	const Register O2_scratch = O2;
twisti@2411	1091	const Register O3_scratch = O3;
never@2950	1092	const Register O4_scratch = O4;
never@2950	1093	const Register G5_scratch = G5;
twisti@2411	1094
never@2950	1095	// Often used names:
never@2950	1096	const Register O0_argslot = O0;
never@2950	1097
never@2950	1098	// Argument registers for _raise_exception:
twisti@2411	1099	const Register O0_code = O0;
twisti@2411	1100	const Register O1_actual = O1;
twisti@2411	1101	const Register O2_required = O2;
twisti@1858	1102
jrose@2639	1103	guarantee(java_lang_invoke_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
twisti@1858	1104
twisti@1858	1105	// Some handy addresses:
twisti@1858	1106	Address G5_method_fie( G5_method, in_bytes(methodOopDesc::from_interpreted_offset()));
twisti@2603	1107	Address G5_method_fce( G5_method, in_bytes(methodOopDesc::from_compiled_offset()));
twisti@1858	1108
jrose@2639	1109	Address G3_mh_vmtarget( G3_method_handle, java_lang_invoke_MethodHandle::vmtarget_offset_in_bytes());
twisti@1858	1110
jrose@2639	1111	Address G3_dmh_vmindex( G3_method_handle, java_lang_invoke_DirectMethodHandle::vmindex_offset_in_bytes());
twisti@1858	1112
jrose@2639	1113	Address G3_bmh_vmargslot( G3_method_handle, java_lang_invoke_BoundMethodHandle::vmargslot_offset_in_bytes());
jrose@2639	1114	Address G3_bmh_argument( G3_method_handle, java_lang_invoke_BoundMethodHandle::argument_offset_in_bytes());
twisti@1858	1115
jrose@2639	1116	Address G3_amh_vmargslot( G3_method_handle, java_lang_invoke_AdapterMethodHandle::vmargslot_offset_in_bytes());
jrose@2639	1117	Address G3_amh_argument ( G3_method_handle, java_lang_invoke_AdapterMethodHandle::argument_offset_in_bytes());
jrose@2639	1118	Address G3_amh_conversion(G3_method_handle, java_lang_invoke_AdapterMethodHandle::conversion_offset_in_bytes());
twisti@1858	1119
twisti@1858	1120	const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
twisti@1858	1121
twisti@1858	1122	if (have_entry(ek)) {
twisti@1858	1123	__ nop(); // empty stubs make SG sick
twisti@1858	1124	return;
twisti@1858	1125	}
twisti@1858	1126
twisti@1858	1127	address interp_entry = __ pc();
twisti@1858	1128
twisti@2204	1129	trace_method_handle(_masm, entry_name(ek));
twisti@1858	1130
never@2950	1131	BLOCK_COMMENT(err_msg("Entry %s {", entry_name(ek)));
never@2950	1132
twisti@1858	1133	switch ((int) ek) {
twisti@1858	1134	case _raise_exception:
twisti@1858	1135	{
twisti@1858	1136	// Not a real MH entry, but rather shared code for raising an
twisti@2603	1137	// exception. Since we use the compiled entry, arguments are
twisti@2603	1138	// expected in compiler argument registers.
twisti@2436	1139	assert(raise_exception_method(), "must be set");
twisti@2603	1140	assert(raise_exception_method()->from_compiled_entry(), "method must be linked");
twisti@1858	1141
twisti@1858	1142	__ mov(O5_savedSP, SP); // Cut the stack back to where the caller started.
twisti@1858	1143
twisti@2411	1144	Label L_no_method;
jrose@2639	1145	// FIXME: fill in _raise_exception_method with a suitable java.lang.invoke method
twisti@1858	1146	__ set(AddressLiteral((address) &_raise_exception_method), G5_method);
twisti@1858	1147	__ ld_ptr(Address(G5_method, 0), G5_method);
twisti@1858	1148	__ tst(G5_method);
twisti@2411	1149	__ brx(Assembler::zero, false, Assembler::pn, L_no_method);
twisti@1858	1150	__ delayed()->nop();
twisti@1858	1151
twisti@2411	1152	const int jobject_oop_offset = 0;
twisti@1858	1153	__ ld_ptr(Address(G5_method, jobject_oop_offset), G5_method);
twisti@1858	1154	__ tst(G5_method);
twisti@2411	1155	__ brx(Assembler::zero, false, Assembler::pn, L_no_method);
twisti@1858	1156	__ delayed()->nop();
twisti@1858	1157
twisti@1858	1158	__ verify_oop(G5_method);
twisti@2603	1159	__ jump_indirect_to(G5_method_fce, O3_scratch); // jump to compiled entry
twisti@1858	1160	__ delayed()->nop();
twisti@1858	1161
twisti@1858	1162	// Do something that is at least causes a valid throw from the interpreter.
twisti@2411	1163	__ bind(L_no_method);
twisti@2411	1164	__ unimplemented("call throw_WrongMethodType_entry");
twisti@1858	1165	}
twisti@1858	1166	break;
twisti@1858	1167
twisti@1858	1168	case _invokestatic_mh:
twisti@1858	1169	case _invokespecial_mh:
twisti@1858	1170	{
twisti@2201	1171	__ load_heap_oop(G3_mh_vmtarget, G5_method); // target is a methodOop
twisti@1858	1172	__ verify_oop(G5_method);
twisti@1858	1173	// Same as TemplateTable::invokestatic or invokespecial,
twisti@1858	1174	// minus the CP setup and profiling:
twisti@1858	1175	if (ek == _invokespecial_mh) {
twisti@1858	1176	// Must load & check the first argument before entering the target method.
twisti@1858	1177	__ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
never@2950	1178	__ ld_ptr(__ argument_address(O0_argslot, O0_argslot, -1), G3_method_handle);
twisti@1858	1179	__ null_check(G3_method_handle);
twisti@1858	1180	__ verify_oop(G3_method_handle);
twisti@1858	1181	}
twisti@1858	1182	__ jump_indirect_to(G5_method_fie, O1_scratch);
twisti@1858	1183	__ delayed()->nop();
twisti@1858	1184	}
twisti@1858	1185	break;
twisti@1858	1186
twisti@1858	1187	case _invokevirtual_mh:
twisti@1858	1188	{
twisti@1858	1189	// Same as TemplateTable::invokevirtual,
twisti@1858	1190	// minus the CP setup and profiling:
twisti@1858	1191
twisti@1858	1192	// Pick out the vtable index and receiver offset from the MH,
twisti@1858	1193	// and then we can discard it:
never@2950	1194	Register O2_index = O2_scratch;
twisti@1858	1195	__ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
never@2950	1196	__ ldsw(G3_dmh_vmindex, O2_index);
twisti@1858	1197	// Note: The verifier allows us to ignore G3_mh_vmtarget.
never@2950	1198	__ ld_ptr(__ argument_address(O0_argslot, O0_argslot, -1), G3_method_handle);
twisti@1858	1199	__ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
twisti@1858	1200
twisti@1858	1201	// Get receiver klass:
twisti@1858	1202	Register O0_klass = O0_argslot;
twisti@1858	1203	__ load_klass(G3_method_handle, O0_klass);
twisti@1858	1204	__ verify_oop(O0_klass);
twisti@1858	1205
twisti@1858	1206	// Get target methodOop & entry point:
twisti@1858	1207	const int base = instanceKlass::vtable_start_offset() * wordSize;
twisti@1858	1208	assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
twisti@1858	1209
never@2950	1210	__ sll_ptr(O2_index, LogBytesPerWord, O2_index);
never@2950	1211	__ add(O0_klass, O2_index, O0_klass);
twisti@1858	1212	Address vtable_entry_addr(O0_klass, base + vtableEntry::method_offset_in_bytes());
twisti@1858	1213	__ ld_ptr(vtable_entry_addr, G5_method);
twisti@1858	1214
twisti@1858	1215	__ verify_oop(G5_method);
twisti@1858	1216	__ jump_indirect_to(G5_method_fie, O1_scratch);
twisti@1858	1217	__ delayed()->nop();
twisti@1858	1218	}
twisti@1858	1219	break;
twisti@1858	1220
twisti@1858	1221	case _invokeinterface_mh:
twisti@1858	1222	{
twisti@1858	1223	// Same as TemplateTable::invokeinterface,
twisti@1858	1224	// minus the CP setup and profiling:
twisti@1858	1225	__ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
twisti@1858	1226	Register O1_intf = O1_scratch;
never@2950	1227	Register G5_index = G5_scratch;
twisti@2201	1228	__ load_heap_oop(G3_mh_vmtarget, O1_intf);
twisti@1858	1229	__ ldsw(G3_dmh_vmindex, G5_index);
never@2950	1230	__ ld_ptr(__ argument_address(O0_argslot, O0_argslot, -1), G3_method_handle);
twisti@1858	1231	__ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
twisti@1858	1232
twisti@1858	1233	// Get receiver klass:
twisti@1858	1234	Register O0_klass = O0_argslot;
twisti@1858	1235	__ load_klass(G3_method_handle, O0_klass);
twisti@1858	1236	__ verify_oop(O0_klass);
twisti@1858	1237
twisti@1858	1238	// Get interface:
twisti@1858	1239	Label no_such_interface;
twisti@1858	1240	__ verify_oop(O1_intf);
twisti@1858	1241	__ lookup_interface_method(O0_klass, O1_intf,
twisti@1858	1242	// Note: next two args must be the same:
twisti@1858	1243	G5_index, G5_method,
twisti@1858	1244	O2_scratch,
twisti@1858	1245	O3_scratch,
twisti@1858	1246	no_such_interface);
twisti@1858	1247
twisti@1858	1248	__ verify_oop(G5_method);
twisti@1858	1249	__ jump_indirect_to(G5_method_fie, O1_scratch);
twisti@1858	1250	__ delayed()->nop();
twisti@1858	1251
twisti@1858	1252	__ bind(no_such_interface);
twisti@1858	1253	// Throw an exception.
twisti@1858	1254	// For historical reasons, it will be IncompatibleClassChangeError.
twisti@1858	1255	__ unimplemented("not tested yet");
twisti@2411	1256	__ ld_ptr(Address(O1_intf, java_mirror_offset), O2_required); // required interface
twisti@2411	1257	__ mov( O0_klass, O1_actual); // bad receiver
twisti@2411	1258	__ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O3_scratch);
twisti@2411	1259	__ delayed()->mov(Bytecodes::_invokeinterface, O0_code); // who is complaining?
twisti@1858	1260	}
twisti@1858	1261	break;
twisti@1858	1262
twisti@1858	1263	case _bound_ref_mh:
twisti@1858	1264	case _bound_int_mh:
twisti@1858	1265	case _bound_long_mh:
twisti@1858	1266	case _bound_ref_direct_mh:
twisti@1858	1267	case _bound_int_direct_mh:
twisti@1858	1268	case _bound_long_direct_mh:
twisti@1858	1269	{
twisti@1858	1270	const bool direct_to_method = (ek >= _bound_ref_direct_mh);
never@2950	1271	BasicType arg_type = ek_bound_mh_arg_type(ek);
never@2950	1272	int arg_slots = type2size[arg_type];
twisti@1858	1273
twisti@1858	1274	// Make room for the new argument:
never@2950	1275	load_vmargslot(_masm, G3_bmh_vmargslot, O0_argslot);
never@2950	1276	__ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
twisti@1858	1277
never@2950	1278	insert_arg_slots(_masm, arg_slots * stack_move_unit(), O0_argslot, O1_scratch, O2_scratch, O3_scratch);
twisti@1858	1279
twisti@1858	1280	// Store bound argument into the new stack slot:
twisti@2201	1281	__ load_heap_oop(G3_bmh_argument, O1_scratch);
twisti@1858	1282	if (arg_type == T_OBJECT) {
twisti@1858	1283	__ st_ptr(O1_scratch, Address(O0_argslot, 0));
twisti@1858	1284	} else {
twisti@1858	1285	Address prim_value_addr(O1_scratch, java_lang_boxing_object::value_offset_in_bytes(arg_type));
never@2950	1286	move_typed_arg(_masm, arg_type, false,
never@2950	1287	prim_value_addr,
never@2950	1288	Address(O0_argslot, 0),
never@2950	1289	O2_scratch); // must be an even register for !_LP64 long moves (uses O2/O3)
twisti@1858	1290	}
twisti@1858	1291
twisti@1858	1292	if (direct_to_method) {
twisti@2201	1293	__ load_heap_oop(G3_mh_vmtarget, G5_method); // target is a methodOop
twisti@1858	1294	__ verify_oop(G5_method);
twisti@1858	1295	__ jump_indirect_to(G5_method_fie, O1_scratch);
twisti@1858	1296	__ delayed()->nop();
twisti@1858	1297	} else {
twisti@2201	1298	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle); // target is a methodOop
twisti@1858	1299	__ verify_oop(G3_method_handle);
twisti@1858	1300	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	1301	}
twisti@1858	1302	}
twisti@1858	1303	break;
twisti@1858	1304
twisti@1858	1305	case _adapter_retype_only:
twisti@1858	1306	case _adapter_retype_raw:
twisti@1858	1307	// Immediately jump to the next MH layer:
twisti@2201	1308	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
never@2950	1309	__ verify_oop(G3_method_handle);
twisti@1858	1310	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	1311	// This is OK when all parameter types widen.
twisti@1858	1312	// It is also OK when a return type narrows.
twisti@1858	1313	break;
twisti@1858	1314
twisti@1858	1315	case _adapter_check_cast:
twisti@1858	1316	{
twisti@1858	1317	// Check a reference argument before jumping to the next layer of MH:
never@2950	1318	load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
never@2950	1319	Address vmarg = __ argument_address(O0_argslot, O0_argslot);
twisti@1858	1320
twisti@1858	1321	// What class are we casting to?
never@2950	1322	Register O1_klass = O1_scratch; // Interesting AMH data.
never@2950	1323	__ load_heap_oop(G3_amh_argument, O1_klass); // This is a Class object!
never@2950	1324	load_klass_from_Class(_masm, O1_klass, O2_scratch, O3_scratch);
twisti@1858	1325
never@2950	1326	Label L_done;
never@2950	1327	__ ld_ptr(vmarg, O2_scratch);
never@2950	1328	__ tst(O2_scratch);
never@2950	1329	__ brx(Assembler::zero, false, Assembler::pn, L_done); // No cast if null.
twisti@1858	1330	__ delayed()->nop();
never@2950	1331	__ load_klass(O2_scratch, O2_scratch);
twisti@1858	1332
twisti@1858	1333	// Live at this point:
twisti@2874	1334	// - O0_argslot : argslot index in vmarg; may be required in the failing path
never@2950	1335	// - O1_klass : klass required by the target method
never@2950	1336	// - O2_scratch : argument klass to test
twisti@1858	1337	// - G3_method_handle: adapter method handle
never@2950	1338	__ check_klass_subtype(O2_scratch, O1_klass, O3_scratch, O4_scratch, L_done);
twisti@1858	1339
twisti@1858	1340	// If we get here, the type check failed!
twisti@2411	1341	__ load_heap_oop(G3_amh_argument, O2_required); // required class
twisti@2411	1342	__ ld_ptr( vmarg, O1_actual); // bad object
twisti@2411	1343	__ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O3_scratch);
twisti@2411	1344	__ delayed()->mov(Bytecodes::_checkcast, O0_code); // who is complaining?
twisti@1858	1345
never@2950	1346	__ BIND(L_done);
twisti@1858	1347	// Get the new MH:
twisti@2201	1348	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858	1349	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	1350	}
twisti@1858	1351	break;
twisti@1858	1352
twisti@1858	1353	case _adapter_prim_to_prim:
twisti@1858	1354	case _adapter_ref_to_prim:
twisti@1858	1355	// Handled completely by optimized cases.
twisti@1858	1356	__ stop("init_AdapterMethodHandle should not issue this");
twisti@1858	1357	break;
twisti@1858	1358
twisti@1858	1359	case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
twisti@1858	1360	//case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
twisti@1858	1361	case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
twisti@1858	1362	case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
twisti@1858	1363	{
twisti@1858	1364	// Perform an in-place conversion to int or an int subword.
never@2950	1365	load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
twisti@2351	1366	Address value;
never@2950	1367	Address vmarg;
twisti@1858	1368	bool value_left_justified = false;
twisti@1858	1369
twisti@1858	1370	switch (ek) {
twisti@1858	1371	case _adapter_opt_i2i:
never@2950	1372	value = vmarg = __ argument_address(O0_argslot, O0_argslot);
twisti@2256	1373	break;
twisti@1858	1374	case _adapter_opt_l2i:
twisti@2256	1375	{
twisti@2256	1376	// just delete the extra slot
twisti@2351	1377	#ifdef _LP64
twisti@2351	1378	// In V9, longs are given 2 64-bit slots in the interpreter, but the
twisti@2351	1379	// data is passed in only 1 slot.
twisti@2351	1380	// Keep the second slot.
never@2950	1381	__ add(__ argument_address(O0_argslot, O0_argslot, -1), O0_argslot);
twisti@2351	1382	remove_arg_slots(_masm, -stack_move_unit(), O0_argslot, O1_scratch, O2_scratch, O3_scratch);
twisti@2351	1383	value = Address(O0_argslot, 4); // Get least-significant 32-bit of 64-bit value.
twisti@2351	1384	vmarg = Address(O0_argslot, Interpreter::stackElementSize);
twisti@2351	1385	#else
twisti@2351	1386	// Keep the first slot.
never@2950	1387	__ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
twisti@2256	1388	remove_arg_slots(_masm, -stack_move_unit(), O0_argslot, O1_scratch, O2_scratch, O3_scratch);
twisti@2351	1389	value = Address(O0_argslot, 0);
twisti@2351	1390	vmarg = value;
twisti@2351	1391	#endif
twisti@2256	1392	}
twisti@1858	1393	break;
twisti@1858	1394	case _adapter_opt_unboxi:
twisti@1858	1395	{
never@2950	1396	vmarg = __ argument_address(O0_argslot, O0_argslot);
twisti@1858	1397	// Load the value up from the heap.
twisti@1858	1398	__ ld_ptr(vmarg, O1_scratch);
twisti@1858	1399	int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
twisti@1858	1400	#ifdef ASSERT
twisti@1858	1401	for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
twisti@1858	1402	if (is_subword_type(BasicType(bt)))
twisti@1858	1403	assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
twisti@1858	1404	}
twisti@1858	1405	#endif
twisti@1858	1406	__ null_check(O1_scratch, value_offset);
twisti@1858	1407	value = Address(O1_scratch, value_offset);
twisti@1858	1408	#ifdef _BIG_ENDIAN
twisti@1858	1409	// Values stored in objects are packed.
twisti@1858	1410	value_left_justified = true;
twisti@1858	1411	#endif
twisti@1858	1412	}
twisti@1858	1413	break;
twisti@1858	1414	default:
twisti@1858	1415	ShouldNotReachHere();
twisti@1858	1416	}
twisti@1858	1417
twisti@1858	1418	// This check is required on _BIG_ENDIAN
never@2950	1419	Register G5_vminfo = G5_scratch;
twisti@1858	1420	__ ldsw(G3_amh_conversion, G5_vminfo);
twisti@1858	1421	assert(CONV_VMINFO_SHIFT == 0, "preshifted");
twisti@1858	1422
twisti@1858	1423	// Original 32-bit vmdata word must be of this form:
twisti@1858	1424	// | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
twisti@1858	1425	__ lduw(value, O1_scratch);
twisti@1858	1426	if (!value_left_justified)
twisti@1858	1427	__ sll(O1_scratch, G5_vminfo, O1_scratch);
twisti@1858	1428	Label zero_extend, done;
twisti@1858	1429	__ btst(CONV_VMINFO_SIGN_FLAG, G5_vminfo);
twisti@1858	1430	__ br(Assembler::zero, false, Assembler::pn, zero_extend);
twisti@1858	1431	__ delayed()->nop();
twisti@1858	1432
twisti@1858	1433	// this path is taken for int->byte, int->short
twisti@1858	1434	__ sra(O1_scratch, G5_vminfo, O1_scratch);
twisti@1858	1435	__ ba(false, done);
twisti@1858	1436	__ delayed()->nop();
twisti@1858	1437
twisti@1858	1438	__ bind(zero_extend);
twisti@1858	1439	// this is taken for int->char
twisti@1858	1440	__ srl(O1_scratch, G5_vminfo, O1_scratch);
twisti@1858	1441
twisti@1858	1442	__ bind(done);
twisti@1858	1443	__ st(O1_scratch, vmarg);
twisti@1858	1444
twisti@1858	1445	// Get the new MH:
twisti@2201	1446	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858	1447	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	1448	}
twisti@1858	1449	break;
twisti@1858	1450
twisti@1858	1451	case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
twisti@1858	1452	case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
twisti@1858	1453	{
twisti@1858	1454	// Perform an in-place int-to-long or ref-to-long conversion.
never@2950	1455	load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
twisti@1858	1456
twisti@1858	1457	// On big-endian machine we duplicate the slot and store the MSW
twisti@1858	1458	// in the first slot.
never@2950	1459	__ add(__ argument_address(O0_argslot, O0_argslot, 1), O0_argslot);
twisti@1858	1460
never@2950	1461	insert_arg_slots(_masm, stack_move_unit(), O0_argslot, O1_scratch, O2_scratch, O3_scratch);
twisti@1858	1462
twisti@1858	1463	Address arg_lsw(O0_argslot, 0);
twisti@1861	1464	Address arg_msw(O0_argslot, -Interpreter::stackElementSize);
twisti@1858	1465
twisti@1858	1466	switch (ek) {
twisti@1858	1467	case _adapter_opt_i2l:
twisti@1858	1468	{
twisti@2664	1469	#ifdef _LP64
twisti@2664	1470	__ ldsw(arg_lsw, O2_scratch); // Load LSW sign-extended
twisti@2664	1471	#else
twisti@2664	1472	__ ldsw(arg_lsw, O3_scratch); // Load LSW sign-extended
twisti@2664	1473	__ srlx(O3_scratch, BitsPerInt, O2_scratch); // Move MSW value to lower 32-bits for std
twisti@2664	1474	#endif
twisti@2664	1475	__ st_long(O2_scratch, arg_msw); // Uses O2/O3 on !_LP64
twisti@1858	1476	}
twisti@1858	1477	break;
twisti@1858	1478	case _adapter_opt_unboxl:
twisti@1858	1479	{
twisti@1858	1480	// Load the value up from the heap.
twisti@1858	1481	__ ld_ptr(arg_lsw, O1_scratch);
twisti@1858	1482	int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
twisti@1858	1483	assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
twisti@1858	1484	__ null_check(O1_scratch, value_offset);
twisti@1858	1485	__ ld_long(Address(O1_scratch, value_offset), O2_scratch); // Uses O2/O3 on !_LP64
twisti@1858	1486	__ st_long(O2_scratch, arg_msw);
twisti@1858	1487	}
twisti@1858	1488	break;
twisti@1858	1489	default:
twisti@1858	1490	ShouldNotReachHere();
twisti@1858	1491	}
twisti@1858	1492
twisti@2201	1493	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858	1494	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	1495	}
twisti@1858	1496	break;
twisti@1858	1497
twisti@1858	1498	case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
twisti@1858	1499	case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
twisti@1858	1500	{
twisti@1858	1501	// perform an in-place floating primitive conversion
twisti@1858	1502	__ unimplemented(entry_name(ek));
twisti@1858	1503	}
twisti@1858	1504	break;
twisti@1858	1505
twisti@1858	1506	case _adapter_prim_to_ref:
twisti@1858	1507	__ unimplemented(entry_name(ek)); // %%% FIXME: NYI
twisti@1858	1508	break;
twisti@1858	1509
twisti@1858	1510	case _adapter_swap_args:
twisti@1858	1511	case _adapter_rot_args:
twisti@1858	1512	// handled completely by optimized cases
twisti@1858	1513	__ stop("init_AdapterMethodHandle should not issue this");
twisti@1858	1514	break;
twisti@1858	1515
twisti@1858	1516	case _adapter_opt_swap_1:
twisti@1858	1517	case _adapter_opt_swap_2:
twisti@1858	1518	case _adapter_opt_rot_1_up:
twisti@1858	1519	case _adapter_opt_rot_1_down:
twisti@1858	1520	case _adapter_opt_rot_2_up:
twisti@1858	1521	case _adapter_opt_rot_2_down:
twisti@1858	1522	{
never@2950	1523	int swap_slots = ek_adapter_opt_swap_slots(ek);
never@2950	1524	int rotate = ek_adapter_opt_swap_mode(ek);
twisti@1858	1525
twisti@1858	1526	// 'argslot' is the position of the first argument to swap.
never@2950	1527	load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
never@2950	1528	__ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
never@2950	1529	if (VerifyMethodHandles)
never@2950	1530	verify_argslot(_masm, O0_argslot, O2_scratch, "swap point must fall within current frame");
twisti@1858	1531
twisti@1858	1532	// 'vminfo' is the second.
twisti@1858	1533	Register O1_destslot = O1_scratch;
never@2950	1534	load_conversion_vminfo(_masm, G3_amh_conversion, O1_destslot);
never@2950	1535	__ add(__ argument_address(O1_destslot, O1_destslot), O1_destslot);
never@2950	1536	if (VerifyMethodHandles)
never@2950	1537	verify_argslot(_masm, O1_destslot, O2_scratch, "swap point must fall within current frame");
twisti@1858	1538
never@2950	1539	assert(Interpreter::stackElementSize == wordSize, "else rethink use of wordSize here");
twisti@1858	1540	if (!rotate) {
never@2950	1541	// simple swap
never@2950	1542	for (int i = 0; i < swap_slots; i++) {
never@2950	1543	__ ld_ptr( Address(O0_argslot, i * wordSize), O2_scratch);
never@2950	1544	__ ld_ptr( Address(O1_destslot, i * wordSize), O3_scratch);
never@2950	1545	__ st_ptr(O3_scratch, Address(O0_argslot, i * wordSize));
never@2950	1546	__ st_ptr(O2_scratch, Address(O1_destslot, i * wordSize));
twisti@1858	1547	}
twisti@1858	1548	} else {
never@2950	1549	// A rotate is actually pair of moves, with an "odd slot" (or pair)
never@2950	1550	// changing place with a series of other slots.
never@2950	1551	// First, push the "odd slot", which is going to get overwritten
never@2950	1552	switch (swap_slots) {
never@2950	1553	case 2 : __ ld_ptr(Address(O0_argslot, 1 * wordSize), O4_scratch); // fall-thru
never@2950	1554	case 1 : __ ld_ptr(Address(O0_argslot, 0 * wordSize), O3_scratch); break;
never@2950	1555	default: ShouldNotReachHere();
twisti@1858	1556	}
twisti@1858	1557	if (rotate > 0) {
never@2950	1558	// Here is rotate > 0:
never@2950	1559	// (low mem) (high mem)
never@2950	1560	// | dest: more_slots... | arg: odd_slot :arg+1 |
never@2950	1561	// =>
never@2950	1562	// | dest: odd_slot | dest+1: more_slots... :arg+1 |
never@2950	1563	// work argslot down to destslot, copying contiguous data upwards
never@2950	1564	// pseudo-code:
twisti@1858	1565	// argslot = src_addr - swap_bytes
twisti@1858	1566	// destslot = dest_addr
never@2950	1567	// while (argslot >= destslot) *(argslot + swap_bytes) = *(argslot + 0), argslot--;
never@2950	1568	move_arg_slots_up(_masm,
never@2950	1569	O1_destslot,
never@2950	1570	Address(O0_argslot, 0),
never@2950	1571	swap_slots,
never@2950	1572	O0_argslot, O2_scratch);
twisti@1858	1573	} else {
never@2950	1574	// Here is the other direction, rotate < 0:
never@2950	1575	// (low mem) (high mem)
never@2950	1576	// | arg: odd_slot | arg+1: more_slots... :dest+1 |
never@2950	1577	// =>
never@2950	1578	// | arg: more_slots... | dest: odd_slot :dest+1 |
never@2950	1579	// work argslot up to destslot, copying contiguous data downwards
never@2950	1580	// pseudo-code:
twisti@1858	1581	// argslot = src_addr + swap_bytes
twisti@1858	1582	// destslot = dest_addr
never@2950	1583	// while (argslot <= destslot) *(argslot - swap_bytes) = *(argslot + 0), argslot++;
never@2950	1584	__ add(O1_destslot, wordSize, O1_destslot);
never@2950	1585	move_arg_slots_down(_masm,
never@2950	1586	Address(O0_argslot, swap_slots * wordSize),
never@2950	1587	O1_destslot,
never@2950	1588	-swap_slots,
never@2950	1589	O0_argslot, O2_scratch);
never@2950	1590
never@2950	1591	__ sub(O1_destslot, wordSize, O1_destslot);
twisti@1858	1592	}
never@2950	1593	// pop the original first chunk into the destination slot, now free
never@2950	1594	switch (swap_slots) {
never@2950	1595	case 2 : __ st_ptr(O4_scratch, Address(O1_destslot, 1 * wordSize)); // fall-thru
never@2950	1596	case 1 : __ st_ptr(O3_scratch, Address(O1_destslot, 0 * wordSize)); break;
never@2950	1597	default: ShouldNotReachHere();
twisti@1858	1598	}
twisti@1858	1599	}
twisti@1858	1600
twisti@2201	1601	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858	1602	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	1603	}
twisti@1858	1604	break;
twisti@1858	1605
twisti@1858	1606	case _adapter_dup_args:
twisti@1858	1607	{
twisti@1858	1608	// 'argslot' is the position of the first argument to duplicate.
never@2950	1609	load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
never@2950	1610	__ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
twisti@1858	1611
twisti@1858	1612	// 'stack_move' is negative number of words to duplicate.
never@2950	1613	Register O1_stack_move = O1_scratch;
never@2950	1614	load_stack_move(_masm, G3_amh_conversion, O1_stack_move);
twisti@1858	1615
never@2950	1616	if (VerifyMethodHandles) {
never@2950	1617	verify_argslots(_masm, O1_stack_move, O0_argslot, O2_scratch, O3_scratch, true,
never@2950	1618	"copied argument(s) must fall within current frame");
never@2950	1619	}
twisti@1858	1620
never@2950	1621	// insert location is always the bottom of the argument list:
never@2950	1622	__ neg(O1_stack_move);
never@2950	1623	push_arg_slots(_masm, O0_argslot, O1_stack_move, O2_scratch, O3_scratch);
twisti@1858	1624
twisti@2201	1625	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858	1626	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	1627	}
twisti@1858	1628	break;
twisti@1858	1629
twisti@1858	1630	case _adapter_drop_args:
twisti@1858	1631	{
twisti@1858	1632	// 'argslot' is the position of the first argument to nuke.
never@2950	1633	load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
never@2950	1634	__ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
twisti@1858	1635
twisti@1858	1636	// 'stack_move' is number of words to drop.
never@2950	1637	Register O1_stack_move = O1_scratch;
never@2950	1638	load_stack_move(_masm, G3_amh_conversion, O1_stack_move);
twisti@1858	1639
never@2950	1640	remove_arg_slots(_masm, O1_stack_move, O0_argslot, O2_scratch, O3_scratch, O4_scratch);
twisti@1858	1641
twisti@2201	1642	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
twisti@1858	1643	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	1644	}
twisti@1858	1645	break;
twisti@1858	1646
twisti@1858	1647	case _adapter_collect_args:
never@2950	1648	case _adapter_fold_args:
twisti@1858	1649	case _adapter_spread_args:
twisti@1858	1650	// Handled completely by optimized cases.
twisti@1858	1651	__ stop("init_AdapterMethodHandle should not issue this");
twisti@1858	1652	break;
twisti@1858	1653
never@2950	1654	case _adapter_opt_collect_ref:
never@2950	1655	case _adapter_opt_collect_int:
never@2950	1656	case _adapter_opt_collect_long:
never@2950	1657	case _adapter_opt_collect_float:
never@2950	1658	case _adapter_opt_collect_double:
never@2950	1659	case _adapter_opt_collect_void:
never@2950	1660	case _adapter_opt_collect_0_ref:
never@2950	1661	case _adapter_opt_collect_1_ref:
never@2950	1662	case _adapter_opt_collect_2_ref:
never@2950	1663	case _adapter_opt_collect_3_ref:
never@2950	1664	case _adapter_opt_collect_4_ref:
never@2950	1665	case _adapter_opt_collect_5_ref:
never@2950	1666	case _adapter_opt_filter_S0_ref:
never@2950	1667	case _adapter_opt_filter_S1_ref:
never@2950	1668	case _adapter_opt_filter_S2_ref:
never@2950	1669	case _adapter_opt_filter_S3_ref:
never@2950	1670	case _adapter_opt_filter_S4_ref:
never@2950	1671	case _adapter_opt_filter_S5_ref:
never@2950	1672	case _adapter_opt_collect_2_S0_ref:
never@2950	1673	case _adapter_opt_collect_2_S1_ref:
never@2950	1674	case _adapter_opt_collect_2_S2_ref:
never@2950	1675	case _adapter_opt_collect_2_S3_ref:
never@2950	1676	case _adapter_opt_collect_2_S4_ref:
never@2950	1677	case _adapter_opt_collect_2_S5_ref:
never@2950	1678	case _adapter_opt_fold_ref:
never@2950	1679	case _adapter_opt_fold_int:
never@2950	1680	case _adapter_opt_fold_long:
never@2950	1681	case _adapter_opt_fold_float:
never@2950	1682	case _adapter_opt_fold_double:
never@2950	1683	case _adapter_opt_fold_void:
never@2950	1684	case _adapter_opt_fold_1_ref:
never@2950	1685	case _adapter_opt_fold_2_ref:
never@2950	1686	case _adapter_opt_fold_3_ref:
never@2950	1687	case _adapter_opt_fold_4_ref:
never@2950	1688	case _adapter_opt_fold_5_ref:
twisti@1858	1689	{
never@2950	1690	// Given a fresh incoming stack frame, build a new ricochet frame.
never@2950	1691	// On entry, TOS points at a return PC, and FP is the callers frame ptr.
never@2950	1692	// RSI/R13 has the caller's exact stack pointer, which we must also preserve.
never@2950	1693	// RCX contains an AdapterMethodHandle of the indicated kind.
never@2950	1694
never@2950	1695	// Relevant AMH fields:
never@2950	1696	// amh.vmargslot:
never@2950	1697	// points to the trailing edge of the arguments
never@2950	1698	// to filter, collect, or fold. For a boxing operation,
never@2950	1699	// it points just after the single primitive value.
never@2950	1700	// amh.argument:
never@2950	1701	// recursively called MH, on |collect| arguments
never@2950	1702	// amh.vmtarget:
never@2950	1703	// final destination MH, on return value, etc.
never@2950	1704	// amh.conversion.dest:
never@2950	1705	// tells what is the type of the return value
never@2950	1706	// (not needed here, since dest is also derived from ek)
never@2950	1707	// amh.conversion.vminfo:
never@2950	1708	// points to the trailing edge of the return value
never@2950	1709	// when the vmtarget is to be called; this is
never@2950	1710	// equal to vmargslot + (retained ? |collect| : 0)
never@2950	1711
never@2950	1712	// Pass 0 or more argument slots to the recursive target.
never@2950	1713	int collect_count_constant = ek_adapter_opt_collect_count(ek);
never@2950	1714
never@2950	1715	// The collected arguments are copied from the saved argument list:
never@2950	1716	int collect_slot_constant = ek_adapter_opt_collect_slot(ek);
never@2950	1717
never@2950	1718	assert(ek_orig == _adapter_collect_args ||
never@2950	1719	ek_orig == _adapter_fold_args, "");
never@2950	1720	bool retain_original_args = (ek_orig == _adapter_fold_args);
never@2950	1721
never@2950	1722	// The return value is replaced (or inserted) at the 'vminfo' argslot.
never@2950	1723	// Sometimes we can compute this statically.
never@2950	1724	int dest_slot_constant = -1;
never@2950	1725	if (!retain_original_args)
never@2950	1726	dest_slot_constant = collect_slot_constant;
never@2950	1727	else if (collect_slot_constant >= 0 && collect_count_constant >= 0)
never@2950	1728	// We are preserving all the arguments, and the return value is prepended,
never@2950	1729	// so the return slot is to the left (above) the |collect| sequence.
never@2950	1730	dest_slot_constant = collect_slot_constant + collect_count_constant;
never@2950	1731
never@2950	1732	// Replace all those slots by the result of the recursive call.
never@2950	1733	// The result type can be one of ref, int, long, float, double, void.
never@2950	1734	// In the case of void, nothing is pushed on the stack after return.
never@2950	1735	BasicType dest = ek_adapter_opt_collect_type(ek);
never@2950	1736	assert(dest == type2wfield[dest], "dest is a stack slot type");
never@2950	1737	int dest_count = type2size[dest];
never@2950	1738	assert(dest_count == 1 || dest_count == 2 || (dest_count == 0 && dest == T_VOID), "dest has a size");
never@2950	1739
never@2950	1740	// Choose a return continuation.
never@2950	1741	EntryKind ek_ret = _adapter_opt_return_any;
never@2950	1742	if (dest != T_CONFLICT && OptimizeMethodHandles) {
never@2950	1743	switch (dest) {
never@2950	1744	case T_INT : ek_ret = _adapter_opt_return_int; break;
never@2950	1745	case T_LONG : ek_ret = _adapter_opt_return_long; break;
never@2950	1746	case T_FLOAT : ek_ret = _adapter_opt_return_float; break;
never@2950	1747	case T_DOUBLE : ek_ret = _adapter_opt_return_double; break;
never@2950	1748	case T_OBJECT : ek_ret = _adapter_opt_return_ref; break;
never@2950	1749	case T_VOID : ek_ret = _adapter_opt_return_void; break;
never@2950	1750	default : ShouldNotReachHere();
never@2950	1751	}
never@2950	1752	if (dest == T_OBJECT && dest_slot_constant >= 0) {
never@2950	1753	EntryKind ek_try = EntryKind(_adapter_opt_return_S0_ref + dest_slot_constant);
never@2950	1754	if (ek_try <= _adapter_opt_return_LAST &&
never@2950	1755	ek_adapter_opt_return_slot(ek_try) == dest_slot_constant) {
never@2950	1756	ek_ret = ek_try;
never@2950	1757	}
never@2950	1758	}
never@2950	1759	assert(ek_adapter_opt_return_type(ek_ret) == dest, "");
never@2950	1760	}
never@2950	1761
never@2950	1762	// Already pushed: ... keep1 | collect | keep2 |
never@2950	1763
never@2950	1764	// Push a few extra argument words, if we need them to store the return value.
never@2950	1765	{
never@2950	1766	int extra_slots = 0;
never@2950	1767	if (retain_original_args) {
never@2950	1768	extra_slots = dest_count;
never@2950	1769	} else if (collect_count_constant == -1) {
never@2950	1770	extra_slots = dest_count; // collect_count might be zero; be generous
never@2950	1771	} else if (dest_count > collect_count_constant) {
never@2950	1772	extra_slots = (dest_count - collect_count_constant);
never@2950	1773	} else {
never@2950	1774	// else we know we have enough dead space in |collect| to repurpose for return values
never@2950	1775	}
never@2950	1776	if (extra_slots != 0) {
never@2950	1777	__ sub(SP, round_to(extra_slots, 2) * Interpreter::stackElementSize, SP);
never@2950	1778	}
never@2950	1779	}
never@2950	1780
never@2950	1781	// Set up Ricochet Frame.
never@2950	1782	__ mov(SP, O5_savedSP); // record SP for the callee
never@2950	1783
never@2950	1784	// One extra (empty) slot for outgoing target MH (see Gargs computation below).
never@2950	1785	__ save_frame(2); // Note: we need to add 2 slots since frame::memory_parameter_word_sp_offset is 23.
never@2950	1786
never@2950	1787	// Note: Gargs is live throughout the following, until we make our recursive call.
never@2950	1788	// And the RF saves a copy in L4_saved_args_base.
never@2950	1789
never@2950	1790	RicochetFrame::enter_ricochet_frame(_masm, G3_method_handle, Gargs,
never@2950	1791	entry(ek_ret)->from_interpreted_entry());
never@2950	1792
never@2950	1793	// Compute argument base:
never@2950	1794	// Set up Gargs for current frame, extra (empty) slot is for outgoing target MH (space reserved by save_frame above).
never@2950	1795	__ add(FP, STACK_BIAS - (1 * Interpreter::stackElementSize), Gargs);
never@2950	1796
never@2950	1797	// Now pushed: ... keep1 | collect | keep2 | extra | [RF]
never@2950	1798
never@2950	1799	#ifdef ASSERT
never@2950	1800	if (VerifyMethodHandles && dest != T_CONFLICT) {
never@2950	1801	BLOCK_COMMENT("verify AMH.conv.dest {");
never@2950	1802	extract_conversion_dest_type(_masm, RicochetFrame::L5_conversion, O1_scratch);
never@2950	1803	Label L_dest_ok;
never@2950	1804	__ cmp(O1_scratch, (int) dest);
never@2950	1805	__ br(Assembler::equal, false, Assembler::pt, L_dest_ok);
never@2950	1806	__ delayed()->nop();
never@2950	1807	if (dest == T_INT) {
never@2950	1808	for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
never@2950	1809	if (is_subword_type(BasicType(bt))) {
never@2950	1810	__ cmp(O1_scratch, (int) bt);
never@2950	1811	__ br(Assembler::equal, false, Assembler::pt, L_dest_ok);
never@2950	1812	__ delayed()->nop();
never@2950	1813	}
never@2950	1814	}
never@2950	1815	}
never@2950	1816	__ stop("bad dest in AMH.conv");
never@2950	1817	__ BIND(L_dest_ok);
never@2950	1818	BLOCK_COMMENT("} verify AMH.conv.dest");
never@2950	1819	}
never@2950	1820	#endif //ASSERT
never@2950	1821
never@2950	1822	// Find out where the original copy of the recursive argument sequence begins.
never@2950	1823	Register O0_coll = O0_scratch;
never@2950	1824	{
never@2950	1825	RegisterOrConstant collect_slot = collect_slot_constant;
never@2950	1826	if (collect_slot_constant == -1) {
never@2950	1827	load_vmargslot(_masm, G3_amh_vmargslot, O1_scratch);
never@2950	1828	collect_slot = O1_scratch;
never@2950	1829	}
never@2950	1830	// collect_slot might be 0, but we need the move anyway.
never@2950	1831	__ add(RicochetFrame::L4_saved_args_base, __ argument_offset(collect_slot, collect_slot.register_or_noreg()), O0_coll);
never@2950	1832	// O0_coll now points at the trailing edge of |collect| and leading edge of |keep2|
never@2950	1833	}
never@2950	1834
never@2950	1835	// Replace the old AMH with the recursive MH. (No going back now.)
never@2950	1836	// In the case of a boxing call, the recursive call is to a 'boxer' method,
never@2950	1837	// such as Integer.valueOf or Long.valueOf. In the case of a filter
never@2950	1838	// or collect call, it will take one or more arguments, transform them,
never@2950	1839	// and return some result, to store back into argument_base[vminfo].
never@2950	1840	__ load_heap_oop(G3_amh_argument, G3_method_handle);
never@2950	1841	if (VerifyMethodHandles) verify_method_handle(_masm, G3_method_handle, O1_scratch, O2_scratch);
never@2950	1842
never@2950	1843	// Calculate |collect|, the number of arguments we are collecting.
never@2950	1844	Register O1_collect_count = O1_scratch;
never@2950	1845	RegisterOrConstant collect_count;
never@2950	1846	if (collect_count_constant < 0) {
never@2950	1847	__ load_method_handle_vmslots(O1_collect_count, G3_method_handle, O2_scratch);
never@2950	1848	collect_count = O1_collect_count;
never@2950	1849	} else {
never@2950	1850	collect_count = collect_count_constant;
never@2950	1851	#ifdef ASSERT
never@2950	1852	if (VerifyMethodHandles) {
never@2950	1853	BLOCK_COMMENT("verify collect_count_constant {");
never@2950	1854	__ load_method_handle_vmslots(O3_scratch, G3_method_handle, O2_scratch);
never@2950	1855	Label L_count_ok;
never@2950	1856	__ cmp(O3_scratch, collect_count_constant);
never@2950	1857	__ br(Assembler::equal, false, Assembler::pt, L_count_ok);
never@2950	1858	__ delayed()->nop();
never@2950	1859	__ stop("bad vminfo in AMH.conv");
never@2950	1860	__ BIND(L_count_ok);
never@2950	1861	BLOCK_COMMENT("} verify collect_count_constant");
never@2950	1862	}
never@2950	1863	#endif //ASSERT
never@2950	1864	}
never@2950	1865
never@2950	1866	// copy |collect| slots directly to TOS:
never@2950	1867	push_arg_slots(_masm, O0_coll, collect_count, O2_scratch, O3_scratch);
never@2950	1868	// Now pushed: ... keep1 | collect | keep2 | RF... | collect |
never@2950	1869	// O0_coll still points at the trailing edge of |collect| and leading edge of |keep2|
never@2950	1870
never@2950	1871	// If necessary, adjust the saved arguments to make room for the eventual return value.
never@2950	1872	// Normal adjustment: ... keep1 | +dest+ | -collect- | keep2 | RF... | collect |
never@2950	1873	// If retaining args: ... keep1 | +dest+ | collect | keep2 | RF... | collect |
never@2950	1874	// In the non-retaining case, this might move keep2 either up or down.
never@2950	1875	// We don't have to copy the whole | RF... collect | complex,
never@2950	1876	// but we must adjust RF.saved_args_base.
never@2950	1877	// Also, from now on, we will forget about the original copy of |collect|.
never@2950	1878	// If we are retaining it, we will treat it as part of |keep2|.
never@2950	1879	// For clarity we will define |keep3| = |collect|keep2| or |keep2|.
never@2950	1880
never@2950	1881	BLOCK_COMMENT("adjust trailing arguments {");
never@2950	1882	// Compare the sizes of |+dest+| and |-collect-|, which are opposed opening and closing movements.
never@2950	1883	int open_count = dest_count;
never@2950	1884	RegisterOrConstant close_count = collect_count_constant;
never@2950	1885	Register O1_close_count = O1_collect_count;
never@2950	1886	if (retain_original_args) {
never@2950	1887	close_count = constant(0);
never@2950	1888	} else if (collect_count_constant == -1) {
never@2950	1889	close_count = O1_collect_count;
never@2950	1890	}
never@2950	1891
never@2950	1892	// How many slots need moving? This is simply dest_slot (0 => no |keep3|).
never@2950	1893	RegisterOrConstant keep3_count;
never@2950	1894	Register O2_keep3_count = O2_scratch;
never@2950	1895	if (dest_slot_constant < 0) {
never@2950	1896	extract_conversion_vminfo(_masm, RicochetFrame::L5_conversion, O2_keep3_count);
never@2950	1897	keep3_count = O2_keep3_count;
never@2950	1898	} else {
never@2950	1899	keep3_count = dest_slot_constant;
never@2950	1900	#ifdef ASSERT
never@2950	1901	if (VerifyMethodHandles && dest_slot_constant < 0) {
never@2950	1902	BLOCK_COMMENT("verify dest_slot_constant {");
never@2950	1903	extract_conversion_vminfo(_masm, RicochetFrame::L5_conversion, O3_scratch);
never@2950	1904	Label L_vminfo_ok;
never@2950	1905	__ cmp(O3_scratch, dest_slot_constant);
never@2950	1906	__ br(Assembler::equal, false, Assembler::pt, L_vminfo_ok);
never@2950	1907	__ delayed()->nop();
never@2950	1908	__ stop("bad vminfo in AMH.conv");
never@2950	1909	__ BIND(L_vminfo_ok);
never@2950	1910	BLOCK_COMMENT("} verify dest_slot_constant");
never@2950	1911	}
never@2950	1912	#endif //ASSERT
never@2950	1913	}
never@2950	1914
never@2950	1915	// tasks remaining:
never@2950	1916	bool move_keep3 = (!keep3_count.is_constant() || keep3_count.as_constant() != 0);
never@2950	1917	bool stomp_dest = (NOT_DEBUG(dest == T_OBJECT) DEBUG_ONLY(dest_count != 0));
never@2950	1918	bool fix_arg_base = (!close_count.is_constant() || open_count != close_count.as_constant());
never@2950	1919
never@2950	1920	// Old and new argument locations (based at slot 0).
never@2950	1921	// Net shift (&new_argv - &old_argv) is (close_count - open_count).
never@2950	1922	bool zero_open_count = (open_count == 0); // remember this bit of info
never@2950	1923	if (move_keep3 && fix_arg_base) {
never@2950	1924	// It will be easier to have everything in one register:
never@2950	1925	if (close_count.is_register()) {
never@2950	1926	// Deduct open_count from close_count register to get a clean +/- value.
never@2950	1927	__ sub(close_count.as_register(), open_count, close_count.as_register());
never@2950	1928	} else {
never@2950	1929	close_count = close_count.as_constant() - open_count;
never@2950	1930	}
never@2950	1931	open_count = 0;
never@2950	1932	}
never@2950	1933	Register L4_old_argv = RicochetFrame::L4_saved_args_base;
never@2950	1934	Register O3_new_argv = O3_scratch;
never@2950	1935	if (fix_arg_base) {
never@2950	1936	__ add(L4_old_argv, __ argument_offset(close_count, O4_scratch), O3_new_argv,
never@2950	1937	-(open_count * Interpreter::stackElementSize));
never@2950	1938	}
never@2950	1939
never@2950	1940	// First decide if any actual data are to be moved.
never@2950	1941	// We can skip if (a) |keep3| is empty, or (b) the argument list size didn't change.
never@2950	1942	// (As it happens, all movements involve an argument list size change.)
never@2950	1943
never@2950	1944	// If there are variable parameters, use dynamic checks to skip around the whole mess.
never@2950	1945	Label L_done;
never@2950	1946	if (keep3_count.is_register()) {
never@2950	1947	__ tst(keep3_count.as_register());
never@2950	1948	__ br(Assembler::zero, false, Assembler::pn, L_done);
never@2950	1949	__ delayed()->nop();
never@2950	1950	}
never@2950	1951	if (close_count.is_register()) {
never@2950	1952	__ cmp(close_count.as_register(), open_count);
never@2950	1953	__ br(Assembler::equal, false, Assembler::pn, L_done);
never@2950	1954	__ delayed()->nop();
never@2950	1955	}
never@2950	1956
never@2950	1957	if (move_keep3 && fix_arg_base) {
never@2950	1958	bool emit_move_down = false, emit_move_up = false, emit_guard = false;
never@2950	1959	if (!close_count.is_constant()) {
never@2950	1960	emit_move_down = emit_guard = !zero_open_count;
never@2950	1961	emit_move_up = true;
never@2950	1962	} else if (open_count != close_count.as_constant()) {
never@2950	1963	emit_move_down = (open_count > close_count.as_constant());
never@2950	1964	emit_move_up = !emit_move_down;
never@2950	1965	}
never@2950	1966	Label L_move_up;
never@2950	1967	if (emit_guard) {
never@2950	1968	__ cmp(close_count.as_register(), open_count);
never@2950	1969	__ br(Assembler::greater, false, Assembler::pn, L_move_up);
never@2950	1970	__ delayed()->nop();
never@2950	1971	}
never@2950	1972
never@2950	1973	if (emit_move_down) {
never@2950	1974	// Move arguments down if |+dest+| > |-collect-|
never@2950	1975	// (This is rare, except when arguments are retained.)
never@2950	1976	// This opens space for the return value.
never@2950	1977	if (keep3_count.is_constant()) {
never@2950	1978	for (int i = 0; i < keep3_count.as_constant(); i++) {
never@2950	1979	__ ld_ptr( Address(L4_old_argv, i * Interpreter::stackElementSize), O4_scratch);
never@2950	1980	__ st_ptr(O4_scratch, Address(O3_new_argv, i * Interpreter::stackElementSize) );
never@2950	1981	}
never@2950	1982	} else {
never@2950	1983	// Live: O1_close_count, O2_keep3_count, O3_new_argv
never@2950	1984	Register argv_top = O0_scratch;
never@2950	1985	__ add(L4_old_argv, __ argument_offset(keep3_count, O4_scratch), argv_top);
never@2950	1986	move_arg_slots_down(_masm,
never@2950	1987	Address(L4_old_argv, 0), // beginning of old argv
never@2950	1988	argv_top, // end of old argv
never@2950	1989	close_count, // distance to move down (must be negative)
never@2950	1990	O4_scratch, G5_scratch);
never@2950	1991	}
never@2950	1992	}
never@2950	1993
never@2950	1994	if (emit_guard) {
never@2950	1995	__ ba(false, L_done); // assumes emit_move_up is true also
never@2950	1996	__ delayed()->nop();
never@2950	1997	__ BIND(L_move_up);
never@2950	1998	}
never@2950	1999
never@2950	2000	if (emit_move_up) {
never@2950	2001	// Move arguments up if |+dest+| < |-collect-|
never@2950	2002	// (This is usual, except when |keep3| is empty.)
never@2950	2003	// This closes up the space occupied by the now-deleted collect values.
never@2950	2004	if (keep3_count.is_constant()) {
never@2950	2005	for (int i = keep3_count.as_constant() - 1; i >= 0; i--) {
never@2950	2006	__ ld_ptr( Address(L4_old_argv, i * Interpreter::stackElementSize), O4_scratch);
never@2950	2007	__ st_ptr(O4_scratch, Address(O3_new_argv, i * Interpreter::stackElementSize) );
never@2950	2008	}
never@2950	2009	} else {
never@2950	2010	Address argv_top(L4_old_argv, __ argument_offset(keep3_count, O4_scratch));
never@2950	2011	// Live: O1_close_count, O2_keep3_count, O3_new_argv
never@2950	2012	move_arg_slots_up(_masm,
never@2950	2013	L4_old_argv, // beginning of old argv
never@2950	2014	argv_top, // end of old argv
never@2950	2015	close_count, // distance to move up (must be positive)
never@2950	2016	O4_scratch, G5_scratch);
never@2950	2017	}
never@2950	2018	}
never@2950	2019	}
never@2950	2020	__ BIND(L_done);
never@2950	2021
never@2950	2022	if (fix_arg_base) {
never@2950	2023	// adjust RF.saved_args_base
never@2950	2024	__ mov(O3_new_argv, RicochetFrame::L4_saved_args_base);
never@2950	2025	}
never@2950	2026
never@2950	2027	if (stomp_dest) {
never@2950	2028	// Stomp the return slot, so it doesn't hold garbage.
never@2950	2029	// This isn't strictly necessary, but it may help detect bugs.
never@2950	2030	__ set(RicochetFrame::RETURN_VALUE_PLACEHOLDER, O4_scratch);
never@2950	2031	__ st_ptr(O4_scratch, Address(RicochetFrame::L4_saved_args_base,
never@2950	2032	__ argument_offset(keep3_count, keep3_count.register_or_noreg()))); // uses O2_keep3_count
never@2950	2033	}
never@2950	2034	BLOCK_COMMENT("} adjust trailing arguments");
never@2950	2035
never@2950	2036	BLOCK_COMMENT("do_recursive_call");
never@2950	2037	__ mov(SP, O5_savedSP); // record SP for the callee
never@2950	2038	__ set(ExternalAddress(SharedRuntime::ricochet_blob()->bounce_addr() - frame::pc_return_offset), O7);
never@2950	2039	// The globally unique bounce address has two purposes:
never@2950	2040	// 1. It helps the JVM recognize this frame (frame::is_ricochet_frame).
never@2950	2041	// 2. When returned to, it cuts back the stack and redirects control flow
never@2950	2042	// to the return handler.
never@2950	2043	// The return handler will further cut back the stack when it takes
never@2950	2044	// down the RF. Perhaps there is a way to streamline this further.
never@2950	2045
never@2950	2046	// State during recursive call:
never@2950	2047	// ... keep1 | dest | dest=42 | keep3 | RF... | collect | bounce_pc |
never@2950	2048	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
twisti@1858	2049	}
twisti@1858	2050	break;
twisti@1858	2051
never@2950	2052	case _adapter_opt_return_ref:
never@2950	2053	case _adapter_opt_return_int:
never@2950	2054	case _adapter_opt_return_long:
never@2950	2055	case _adapter_opt_return_float:
never@2950	2056	case _adapter_opt_return_double:
never@2950	2057	case _adapter_opt_return_void:
never@2950	2058	case _adapter_opt_return_S0_ref:
never@2950	2059	case _adapter_opt_return_S1_ref:
never@2950	2060	case _adapter_opt_return_S2_ref:
never@2950	2061	case _adapter_opt_return_S3_ref:
never@2950	2062	case _adapter_opt_return_S4_ref:
never@2950	2063	case _adapter_opt_return_S5_ref:
never@2950	2064	{
never@2950	2065	BasicType dest_type_constant = ek_adapter_opt_return_type(ek);
never@2950	2066	int dest_slot_constant = ek_adapter_opt_return_slot(ek);
never@2950	2067
never@2950	2068	if (VerifyMethodHandles) RicochetFrame::verify_clean(_masm);
never@2950	2069
never@2950	2070	if (dest_slot_constant == -1) {
never@2950	2071	// The current stub is a general handler for this dest_type.
never@2950	2072	// It can be called from _adapter_opt_return_any below.
never@2950	2073	// Stash the address in a little table.
never@2950	2074	assert((dest_type_constant & CONV_TYPE_MASK) == dest_type_constant, "oob");
never@2950	2075	address return_handler = __ pc();
never@2950	2076	_adapter_return_handlers[dest_type_constant] = return_handler;
never@2950	2077	if (dest_type_constant == T_INT) {
never@2950	2078	// do the subword types too
never@2950	2079	for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
never@2950	2080	if (is_subword_type(BasicType(bt)) &&
never@2950	2081	_adapter_return_handlers[bt] == NULL) {
never@2950	2082	_adapter_return_handlers[bt] = return_handler;
never@2950	2083	}
never@2950	2084	}
never@2950	2085	}
never@2950	2086	}
never@2950	2087
never@2950	2088	// On entry to this continuation handler, make Gargs live again.
never@2950	2089	__ mov(RicochetFrame::L4_saved_args_base, Gargs);
never@2950	2090
never@2950	2091	Register O7_temp = O7;
never@2950	2092	Register O5_vminfo = O5;
never@2950	2093
never@2950	2094	RegisterOrConstant dest_slot = dest_slot_constant;
never@2950	2095	if (dest_slot_constant == -1) {
never@2950	2096	extract_conversion_vminfo(_masm, RicochetFrame::L5_conversion, O5_vminfo);
never@2950	2097	dest_slot = O5_vminfo;
never@2950	2098	}
never@2950	2099	// Store the result back into the argslot.
never@2950	2100	// This code uses the interpreter calling sequence, in which the return value
never@2950	2101	// is usually left in the TOS register, as defined by InterpreterMacroAssembler::pop.
never@2950	2102	// There are certain irregularities with floating point values, which can be seen
never@2950	2103	// in TemplateInterpreterGenerator::generate_return_entry_for.
never@2950	2104	move_return_value(_masm, dest_type_constant, __ argument_address(dest_slot, O7_temp));
never@2950	2105
never@2950	2106	RicochetFrame::leave_ricochet_frame(_masm, G3_method_handle, I5_savedSP, I7);
never@2950	2107
never@2950	2108	// Load the final target and go.
never@2950	2109	if (VerifyMethodHandles) verify_method_handle(_masm, G3_method_handle, O0_scratch, O1_scratch);
never@2950	2110	__ restore(I5_savedSP, G0, SP);
never@2950	2111	__ jump_to_method_handle_entry(G3_method_handle, O0_scratch);
never@2950	2112	__ illtrap(0);
never@2950	2113	}
never@2950	2114	break;
never@2950	2115
never@2950	2116	case _adapter_opt_return_any:
never@2950	2117	{
never@2950	2118	Register O7_temp = O7;
never@2950	2119	Register O5_dest_type = O5;
never@2950	2120
never@2950	2121	if (VerifyMethodHandles) RicochetFrame::verify_clean(_masm);
never@2950	2122	extract_conversion_dest_type(_masm, RicochetFrame::L5_conversion, O5_dest_type);
never@2950	2123	__ set(ExternalAddress((address) &_adapter_return_handlers[0]), O7_temp);
never@2950	2124	__ sll_ptr(O5_dest_type, LogBytesPerWord, O5_dest_type);
never@2950	2125	__ ld_ptr(O7_temp, O5_dest_type, O7_temp);
never@2950	2126
never@2950	2127	#ifdef ASSERT
never@2950	2128	{ Label L_ok;
never@2950	2129	__ br_notnull(O7_temp, false, Assembler::pt, L_ok);
never@2950	2130	__ delayed()->nop();
never@2950	2131	__ stop("bad method handle return");
never@2950	2132	__ BIND(L_ok);
never@2950	2133	}
never@2950	2134	#endif //ASSERT
never@2950	2135	__ JMP(O7_temp, 0);
never@2950	2136	__ delayed()->nop();
never@2950	2137	}
never@2950	2138	break;
never@2950	2139
never@2950	2140	case _adapter_opt_spread_0:
never@2950	2141	case _adapter_opt_spread_1_ref:
never@2950	2142	case _adapter_opt_spread_2_ref:
never@2950	2143	case _adapter_opt_spread_3_ref:
never@2950	2144	case _adapter_opt_spread_4_ref:
never@2950	2145	case _adapter_opt_spread_5_ref:
never@2950	2146	case _adapter_opt_spread_ref:
never@2950	2147	case _adapter_opt_spread_byte:
never@2950	2148	case _adapter_opt_spread_char:
never@2950	2149	case _adapter_opt_spread_short:
never@2950	2150	case _adapter_opt_spread_int:
never@2950	2151	case _adapter_opt_spread_long:
never@2950	2152	case _adapter_opt_spread_float:
never@2950	2153	case _adapter_opt_spread_double:
never@2950	2154	{
never@2950	2155	// spread an array out into a group of arguments
never@2950	2156	int length_constant = ek_adapter_opt_spread_count(ek);
never@2950	2157	bool length_can_be_zero = (length_constant == 0);
never@2950	2158	if (length_constant < 0) {
never@2950	2159	// some adapters with variable length must handle the zero case
never@2950	2160	if (!OptimizeMethodHandles ||
never@2950	2161	ek_adapter_opt_spread_type(ek) != T_OBJECT)
never@2950	2162	length_can_be_zero = true;
never@2950	2163	}
never@2950	2164
never@2950	2165	// find the address of the array argument
never@2950	2166	load_vmargslot(_masm, G3_amh_vmargslot, O0_argslot);
never@2950	2167	__ add(__ argument_address(O0_argslot, O0_argslot), O0_argslot);
never@2950	2168
never@2950	2169	// O0_argslot points both to the array and to the first output arg
never@2950	2170	Address vmarg = Address(O0_argslot, 0);
never@2950	2171
never@2950	2172	// Get the array value.
never@2950	2173	Register O1_array = O1_scratch;
never@2950	2174	Register O2_array_klass = O2_scratch;
never@2950	2175	BasicType elem_type = ek_adapter_opt_spread_type(ek);
never@2950	2176	int elem_slots = type2size[elem_type]; // 1 or 2
never@2950	2177	int array_slots = 1; // array is always a T_OBJECT
never@2950	2178	int length_offset = arrayOopDesc::length_offset_in_bytes();
never@2950	2179	int elem0_offset = arrayOopDesc::base_offset_in_bytes(elem_type);
never@2950	2180	__ ld_ptr(vmarg, O1_array);
never@2950	2181
never@2950	2182	Label L_array_is_empty, L_insert_arg_space, L_copy_args, L_args_done;
never@2950	2183	if (length_can_be_zero) {
never@2950	2184	// handle the null pointer case, if zero is allowed
never@2950	2185	Label L_skip;
never@2950	2186	if (length_constant < 0) {
never@2950	2187	load_conversion_vminfo(_masm, G3_amh_conversion, O3_scratch);
never@2950	2188	__ br_zero(Assembler::notZero, false, Assembler::pn, O3_scratch, L_skip);
never@2950	2189	__ delayed()->nop();
never@2950	2190	}
never@2950	2191	__ br_null(O1_array, false, Assembler::pn, L_array_is_empty);
never@2950	2192	__ delayed()->nop();
never@2950	2193	__ BIND(L_skip);
never@2950	2194	}
never@2950	2195	__ null_check(O1_array, oopDesc::klass_offset_in_bytes());
never@2950	2196	__ load_klass(O1_array, O2_array_klass);
never@2950	2197
never@2950	2198	// Check the array type.
never@2950	2199	Register O3_klass = O3_scratch;
never@2950	2200	__ load_heap_oop(G3_amh_argument, O3_klass); // this is a Class object!
never@2950	2201	load_klass_from_Class(_masm, O3_klass, O4_scratch, G5_scratch);
never@2950	2202
never@2950	2203	Label L_ok_array_klass, L_bad_array_klass, L_bad_array_length;
never@2950	2204	__ check_klass_subtype(O2_array_klass, O3_klass, O4_scratch, G5_scratch, L_ok_array_klass);
never@2950	2205	// If we get here, the type check failed!
never@2950	2206	__ ba(false, L_bad_array_klass);
never@2950	2207	__ delayed()->nop();
never@2950	2208	__ BIND(L_ok_array_klass);
never@2950	2209
never@2950	2210	// Check length.
never@2950	2211	if (length_constant >= 0) {
never@2950	2212	__ ldsw(Address(O1_array, length_offset), O4_scratch);
never@2950	2213	__ cmp(O4_scratch, length_constant);
never@2950	2214	} else {
never@2950	2215	Register O3_vminfo = O3_scratch;
never@2950	2216	load_conversion_vminfo(_masm, G3_amh_conversion, O3_vminfo);
never@2950	2217	__ ldsw(Address(O1_array, length_offset), O4_scratch);
never@2950	2218	__ cmp(O3_vminfo, O4_scratch);
never@2950	2219	}
never@2950	2220	__ br(Assembler::notEqual, false, Assembler::pn, L_bad_array_length);
never@2950	2221	__ delayed()->nop();
never@2950	2222
never@2950	2223	Register O2_argslot_limit = O2_scratch;
never@2950	2224
never@2950	2225	// Array length checks out. Now insert any required stack slots.
never@2950	2226	if (length_constant == -1) {
never@2950	2227	// Form a pointer to the end of the affected region.
never@2950	2228	__ add(O0_argslot, Interpreter::stackElementSize, O2_argslot_limit);
never@2950	2229	// 'stack_move' is negative number of words to insert
never@2950	2230	// This number already accounts for elem_slots.
never@2950	2231	Register O3_stack_move = O3_scratch;
never@2950	2232	load_stack_move(_masm, G3_amh_conversion, O3_stack_move);
never@2950	2233	__ cmp(O3_stack_move, 0);
never@2950	2234	assert(stack_move_unit() < 0, "else change this comparison");
never@2950	2235	__ br(Assembler::less, false, Assembler::pn, L_insert_arg_space);
never@2950	2236	__ delayed()->nop();
never@2950	2237	__ br(Assembler::equal, false, Assembler::pn, L_copy_args);
never@2950	2238	__ delayed()->nop();
never@2950	2239	// single argument case, with no array movement
never@2950	2240	__ BIND(L_array_is_empty);
never@2950	2241	remove_arg_slots(_masm, -stack_move_unit() * array_slots,
never@2950	2242	O0_argslot, O1_scratch, O2_scratch, O3_scratch);
never@2950	2243	__ ba(false, L_args_done); // no spreading to do
never@2950	2244	__ delayed()->nop();
never@2950	2245	__ BIND(L_insert_arg_space);
never@2950	2246	// come here in the usual case, stack_move < 0 (2 or more spread arguments)
never@2950	2247	// Live: O1_array, O2_argslot_limit, O3_stack_move
never@2950	2248	insert_arg_slots(_masm, O3_stack_move,
never@2950	2249	O0_argslot, O4_scratch, G5_scratch, O1_scratch);
never@2950	2250	// reload from rdx_argslot_limit since rax_argslot is now decremented
never@2950	2251	__ ld_ptr(Address(O2_argslot_limit, -Interpreter::stackElementSize), O1_array);
never@2950	2252	} else if (length_constant >= 1) {
never@2950	2253	int new_slots = (length_constant * elem_slots) - array_slots;
never@2950	2254	insert_arg_slots(_masm, new_slots * stack_move_unit(),
never@2950	2255	O0_argslot, O2_scratch, O3_scratch, O4_scratch);
never@2950	2256	} else if (length_constant == 0) {
never@2950	2257	__ BIND(L_array_is_empty);
never@2950	2258	remove_arg_slots(_masm, -stack_move_unit() * array_slots,
never@2950	2259	O0_argslot, O1_scratch, O2_scratch, O3_scratch);
never@2950	2260	} else {
never@2950	2261	ShouldNotReachHere();
never@2950	2262	}
never@2950	2263
never@2950	2264	// Copy from the array to the new slots.
never@2950	2265	// Note: Stack change code preserves integrity of O0_argslot pointer.
never@2950	2266	// So even after slot insertions, O0_argslot still points to first argument.
never@2950	2267	// Beware: Arguments that are shallow on the stack are deep in the array,
never@2950	2268	// and vice versa. So a downward-growing stack (the usual) has to be copied
never@2950	2269	// elementwise in reverse order from the source array.
never@2950	2270	__ BIND(L_copy_args);
never@2950	2271	if (length_constant == -1) {
never@2950	2272	// [O0_argslot, O2_argslot_limit) is the area we are inserting into.
never@2950	2273	// Array element [0] goes at O0_argslot_limit[-wordSize].
never@2950	2274	Register O1_source = O1_array;
never@2950	2275	__ add(Address(O1_array, elem0_offset), O1_source);
never@2950	2276	Register O4_fill_ptr = O4_scratch;
never@2950	2277	__ mov(O2_argslot_limit, O4_fill_ptr);
never@2950	2278	Label L_loop;
never@2950	2279	__ BIND(L_loop);
never@2950	2280	__ add(O4_fill_ptr, -Interpreter::stackElementSize * elem_slots, O4_fill_ptr);
never@2950	2281	move_typed_arg(_masm, elem_type, true,
never@2950	2282	Address(O1_source, 0), Address(O4_fill_ptr, 0),
never@2950	2283	O2_scratch); // must be an even register for !_LP64 long moves (uses O2/O3)
never@2950	2284	__ add(O1_source, type2aelembytes(elem_type), O1_source);
never@2950	2285	__ cmp(O4_fill_ptr, O0_argslot);
never@2950	2286	__ brx(Assembler::greaterUnsigned, false, Assembler::pt, L_loop);
never@2950	2287	__ delayed()->nop(); // FILLME
never@2950	2288	} else if (length_constant == 0) {
never@2950	2289	// nothing to copy
never@2950	2290	} else {
never@2950	2291	int elem_offset = elem0_offset;
never@2950	2292	int slot_offset = length_constant * Interpreter::stackElementSize;
never@2950	2293	for (int index = 0; index < length_constant; index++) {
never@2950	2294	slot_offset -= Interpreter::stackElementSize * elem_slots; // fill backward
never@2950	2295	move_typed_arg(_masm, elem_type, true,
never@2950	2296	Address(O1_array, elem_offset), Address(O0_argslot, slot_offset),
never@2950	2297	O2_scratch); // must be an even register for !_LP64 long moves (uses O2/O3)
never@2950	2298	elem_offset += type2aelembytes(elem_type);
never@2950	2299	}
never@2950	2300	}
never@2950	2301	__ BIND(L_args_done);
never@2950	2302
never@2950	2303	// Arguments are spread. Move to next method handle.
never@2950	2304	__ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
never@2950	2305	__ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
never@2950	2306
never@2950	2307	__ BIND(L_bad_array_klass);
never@2950	2308	assert(!vmarg.uses(O2_required), "must be different registers");
never@2950	2309	__ load_heap_oop(Address(O2_array_klass, java_mirror_offset), O2_required); // required class
never@2950	2310	__ ld_ptr( vmarg, O1_actual); // bad object
never@2950	2311	__ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O3_scratch);
never@2950	2312	__ delayed()->mov(Bytecodes::_aaload, O0_code); // who is complaining?
never@2950	2313
never@2950	2314	__ bind(L_bad_array_length);
never@2950	2315	assert(!vmarg.uses(O2_required), "must be different registers");
never@2950	2316	__ mov( G3_method_handle, O2_required); // required class
never@2950	2317	__ ld_ptr(vmarg, O1_actual); // bad object
never@2950	2318	__ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O3_scratch);
never@2950	2319	__ delayed()->mov(Bytecodes::_arraylength, O0_code); // who is complaining?
never@2950	2320	}
twisti@1858	2321	break;
twisti@1858	2322
twisti@1858	2323	default:
never@2950	2324	DEBUG_ONLY(tty->print_cr("bad ek=%d (%s)", (int)ek, entry_name(ek)));
twisti@1858	2325	ShouldNotReachHere();
twisti@1858	2326	}
never@2950	2327	BLOCK_COMMENT(err_msg("} Entry %s", entry_name(ek)));
twisti@1858	2328
twisti@1858	2329	address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
twisti@1858	2330	__ unimplemented(entry_name(ek)); // %%% FIXME: NYI
twisti@1858	2331
twisti@1858	2332	init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
jrose@1145	2333	}