1 /*
2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_methodHandles_x86.cpp.incl"
27
28 #define __ _masm->
29
30 address MethodHandleEntry::start_compiled_entry(MacroAssembler* _masm,
31 address interpreted_entry) {
32 // Just before the actual machine code entry point, allocate space
33 // for a MethodHandleEntry::Data record, so that we can manage everything
34 // from one base pointer.
35 __ align(wordSize);
36 address target = __ pc() + sizeof(Data);
37 while (__ pc() < target) {
38 __ nop();
39 __ align(wordSize);
40 }
41
42 MethodHandleEntry* me = (MethodHandleEntry*) __ pc();
43 me->set_end_address(__ pc()); // set a temporary end_address
44 me->set_from_interpreted_entry(interpreted_entry);
45 me->set_type_checking_entry(NULL);
46
47 return (address) me;
48 }
49
50 MethodHandleEntry* MethodHandleEntry::finish_compiled_entry(MacroAssembler* _masm,
51 address start_addr) {
52 MethodHandleEntry* me = (MethodHandleEntry*) start_addr;
53 assert(me->end_address() == start_addr, "valid ME");
54
55 // Fill in the real end_address:
56 __ align(wordSize);
57 me->set_end_address(__ pc());
58
59 return me;
60 }
61
62 #ifdef ASSERT
63 static void verify_argslot(MacroAssembler* _masm, Register rax_argslot,
64 const char* error_message) {
65 // Verify that argslot lies within (rsp, rbp].
66 Label L_ok, L_bad;
67 __ cmpptr(rax_argslot, rbp);
68 __ jcc(Assembler::above, L_bad);
69 __ cmpptr(rsp, rax_argslot);
70 __ jcc(Assembler::below, L_ok);
71 __ bind(L_bad);
72 __ stop(error_message);
73 __ bind(L_ok);
74 }
75 #endif
76
77
78 // Code generation
79 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) {
80 // rbx: methodOop
81 // rcx: receiver method handle (must load from sp[MethodTypeForm.vmslots])
82 // rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
83 // rdx: garbage temp, blown away
84
85 Register rbx_method = rbx;
86 Register rcx_recv = rcx;
87 Register rax_mtype = rax;
88 Register rdx_temp = rdx;
89
90 // emit WrongMethodType path first, to enable jccb back-branch from main path
91 Label wrong_method_type;
92 __ bind(wrong_method_type);
93 __ push(rax_mtype); // required mtype
94 __ push(rcx_recv); // bad mh (1st stacked argument)
95 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
96
97 // here's where control starts out:
98 __ align(CodeEntryAlignment);
99 address entry_point = __ pc();
100
101 // fetch the MethodType from the method handle into rax (the 'check' register)
102 {
103 Register tem = rbx_method;
104 for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) {
105 __ movptr(rax_mtype, Address(tem, *pchase));
106 tem = rax_mtype; // in case there is another indirection
107 }
108 }
109 Register rbx_temp = rbx_method; // done with incoming methodOop
110
111 // given the MethodType, find out where the MH argument is buried
112 __ movptr(rdx_temp, Address(rax_mtype,
113 __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, rbx_temp)));
114 __ movl(rdx_temp, Address(rdx_temp,
115 __ delayed_value(java_dyn_MethodTypeForm::vmslots_offset_in_bytes, rbx_temp)));
116 __ movptr(rcx_recv, __ argument_address(rdx_temp));
117
118 __ check_method_handle_type(rax_mtype, rcx_recv, rdx_temp, wrong_method_type);
119 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
120
121 return entry_point;
122 }
123
124 // Helper to insert argument slots into the stack.
125 // arg_slots must be a multiple of stack_move_unit() and <= 0
126 void MethodHandles::insert_arg_slots(MacroAssembler* _masm,
127 RegisterOrConstant arg_slots,
128 int arg_mask,
129 Register rax_argslot,
130 Register rbx_temp, Register rdx_temp) {
131 assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
132 (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
133
134 #ifdef ASSERT
135 verify_argslot(_masm, rax_argslot, "insertion point must fall within current frame");
136 if (arg_slots.is_register()) {
137 Label L_ok, L_bad;
138 __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
139 __ jcc(Assembler::greater, L_bad);
140 __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
141 __ jcc(Assembler::zero, L_ok);
142 __ bind(L_bad);
143 __ stop("assert arg_slots <= 0 and clear low bits");
144 __ bind(L_ok);
145 } else {
146 assert(arg_slots.as_constant() <= 0, "");
147 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
148 }
149 #endif //ASSERT
150
151 #ifdef _LP64
152 if (arg_slots.is_register()) {
153 // clean high bits of stack motion register (was loaded as an int)
154 __ movslq(arg_slots.as_register(), arg_slots.as_register());
155 }
156 #endif
157
158 // Make space on the stack for the inserted argument(s).
159 // Then pull down everything shallower than rax_argslot.
160 // The stacked return address gets pulled down with everything else.
161 // That is, copy [rsp, argslot) downward by -size words. In pseudo-code:
162 // rsp -= size;
163 // for (rdx = rsp + size; rdx < argslot; rdx++)
164 // rdx[-size] = rdx[0]
165 // argslot -= size;
166 __ mov(rdx_temp, rsp); // source pointer for copy
167 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
168 {
169 Label loop;
170 __ bind(loop);
171 // pull one word down each time through the loop
172 __ movptr(rbx_temp, Address(rdx_temp, 0));
173 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
174 __ addptr(rdx_temp, wordSize);
175 __ cmpptr(rdx_temp, rax_argslot);
176 __ jcc(Assembler::less, loop);
177 }
178
179 // Now move the argslot down, to point to the opened-up space.
180 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
181
182 if (TaggedStackInterpreter && arg_mask != _INSERT_NO_MASK) {
183 // The caller has specified a bitmask of tags to put into the opened space.
184 // This only works when the arg_slots value is an assembly-time constant.
185 int constant_arg_slots = arg_slots.as_constant() / stack_move_unit();
186 int tag_offset = Interpreter::tag_offset_in_bytes() - Interpreter::value_offset_in_bytes();
187 for (int slot = 0; slot < constant_arg_slots; slot++) {
188 BasicType slot_type = ((arg_mask & (1 << slot)) == 0 ? T_OBJECT : T_INT);
189 int slot_offset = Interpreter::stackElementSize() * slot;
190 Address tag_addr(rax_argslot, slot_offset + tag_offset);
191 __ movptr(tag_addr, frame::tag_for_basic_type(slot_type));
192 }
193 // Note that the new argument slots are tagged properly but contain
194 // garbage at this point. The value portions must be initialized
195 // by the caller. (Especially references!)
196 }
197 }
198
199 // Helper to remove argument slots from the stack.
200 // arg_slots must be a multiple of stack_move_unit() and >= 0
201 void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
202 RegisterOrConstant arg_slots,
203 Register rax_argslot,
204 Register rbx_temp, Register rdx_temp) {
205 assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
206 (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
207
208 #ifdef ASSERT
209 {
210 // Verify that [argslot..argslot+size) lies within (rsp, rbp).
211 Label L_ok, L_bad;
212 __ lea(rbx_temp, Address(rax_argslot, arg_slots, Address::times_ptr));
213 __ cmpptr(rbx_temp, rbp);
214 __ jcc(Assembler::above, L_bad);
215 __ cmpptr(rsp, rax_argslot);
216 __ jcc(Assembler::below, L_ok);
217 __ bind(L_bad);
218 __ stop("deleted argument(s) must fall within current frame");
219 __ bind(L_ok);
220 }
221 if (arg_slots.is_register()) {
222 Label L_ok, L_bad;
223 __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
224 __ jcc(Assembler::less, L_bad);
225 __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
226 __ jcc(Assembler::zero, L_ok);
227 __ bind(L_bad);
228 __ stop("assert arg_slots >= 0 and clear low bits");
229 __ bind(L_ok);
230 } else {
231 assert(arg_slots.as_constant() >= 0, "");
232 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
233 }
234 #endif //ASSERT
235
236 #ifdef _LP64
237 if (false) { // not needed, since register is positive
238 // clean high bits of stack motion register (was loaded as an int)
239 if (arg_slots.is_register())
240 __ movslq(arg_slots.as_register(), arg_slots.as_register());
241 }
242 #endif
243
244 // Pull up everything shallower than rax_argslot.
245 // Then remove the excess space on the stack.
246 // The stacked return address gets pulled up with everything else.
247 // That is, copy [rsp, argslot) upward by size words. In pseudo-code:
248 // for (rdx = argslot-1; rdx >= rsp; --rdx)
249 // rdx[size] = rdx[0]
250 // argslot += size;
251 // rsp += size;
252 __ lea(rdx_temp, Address(rax_argslot, -wordSize)); // source pointer for copy
253 {
254 Label loop;
255 __ bind(loop);
256 // pull one word up each time through the loop
257 __ movptr(rbx_temp, Address(rdx_temp, 0));
258 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
259 __ addptr(rdx_temp, -wordSize);
260 __ cmpptr(rdx_temp, rsp);
261 __ jcc(Assembler::greaterEqual, loop);
262 }
263
264 // Now move the argslot up, to point to the just-copied block.
265 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
266 // And adjust the argslot address to point at the deletion point.
267 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
268 }
269
270 #ifndef PRODUCT
271 void trace_method_handle_stub(const char* adaptername,
272 oopDesc* mh,
273 intptr_t* entry_sp,
274 intptr_t* saved_sp,
275 intptr_t* saved_bp) {
276 // called as a leaf from native code: do not block the JVM!
277 intptr_t* last_sp = (intptr_t*) saved_bp[frame::interpreter_frame_last_sp_offset];
278 intptr_t* base_sp = (intptr_t*) saved_bp[frame::interpreter_frame_monitor_block_top_offset];
279 printf("MH %s mh="INTPTR_FORMAT" sp=("INTPTR_FORMAT"+"INTX_FORMAT") stack_size="INTX_FORMAT" bp="INTPTR_FORMAT"\n",
280 adaptername, (intptr_t)mh, (intptr_t)entry_sp, (intptr_t)(saved_sp - entry_sp), (intptr_t)(base_sp - last_sp), (intptr_t)saved_bp);
281 if (last_sp != saved_sp)
282 printf("*** last_sp="INTPTR_FORMAT"\n", (intptr_t)last_sp);
283 }
284 #endif //PRODUCT
285
286 // Generate an "entry" field for a method handle.
287 // This determines how the method handle will respond to calls.
288 void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
289 // Here is the register state during an interpreted call,
290 // as set up by generate_method_handle_interpreter_entry():
291 // - rbx: garbage temp (was MethodHandle.invoke methodOop, unused)
292 // - rcx: receiver method handle
293 // - rax: method handle type (only used by the check_mtype entry point)
294 // - rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
295 // - rdx: garbage temp, can blow away
296
297 Register rcx_recv = rcx;
298 Register rax_argslot = rax;
299 Register rbx_temp = rbx;
300 Register rdx_temp = rdx;
301
302 // This guy is set up by prepare_to_jump_from_interpreted (from interpreted calls)
303 // and gen_c2i_adapter (from compiled calls):
304 Register saved_last_sp = LP64_ONLY(r13) NOT_LP64(rsi);
305
306 guarantee(java_dyn_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
307
308 // some handy addresses
309 Address rbx_method_fie( rbx, methodOopDesc::from_interpreted_offset() );
310
311 Address rcx_mh_vmtarget( rcx_recv, java_dyn_MethodHandle::vmtarget_offset_in_bytes() );
312 Address rcx_dmh_vmindex( rcx_recv, sun_dyn_DirectMethodHandle::vmindex_offset_in_bytes() );
313
314 Address rcx_bmh_vmargslot( rcx_recv, sun_dyn_BoundMethodHandle::vmargslot_offset_in_bytes() );
315 Address rcx_bmh_argument( rcx_recv, sun_dyn_BoundMethodHandle::argument_offset_in_bytes() );
316
317 Address rcx_amh_vmargslot( rcx_recv, sun_dyn_AdapterMethodHandle::vmargslot_offset_in_bytes() );
318 Address rcx_amh_argument( rcx_recv, sun_dyn_AdapterMethodHandle::argument_offset_in_bytes() );
319 Address rcx_amh_conversion( rcx_recv, sun_dyn_AdapterMethodHandle::conversion_offset_in_bytes() );
320 Address vmarg; // __ argument_address(vmargslot)
321
322 int tag_offset = -1;
323 if (TaggedStackInterpreter) {
324 tag_offset = Interpreter::tag_offset_in_bytes() - Interpreter::value_offset_in_bytes();
325 assert(tag_offset = wordSize, "stack grows as expected");
326 }
327
328 const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
329
330 if (have_entry(ek)) {
331 __ nop(); // empty stubs make SG sick
332 return;
333 }
334
335 address interp_entry = __ pc();
336 if (UseCompressedOops) __ unimplemented("UseCompressedOops");
337
338 #ifndef PRODUCT
339 if (TraceMethodHandles) {
340 __ push(rax); __ push(rbx); __ push(rcx); __ push(rdx); __ push(rsi); __ push(rdi);
341 __ lea(rax, Address(rsp, wordSize*6)); // entry_sp
342 // arguments:
343 __ push(rbp); // interpreter frame pointer
344 __ push(rsi); // saved_sp
345 __ push(rax); // entry_sp
346 __ push(rcx); // mh
347 __ push(rcx);
348 __ movptr(Address(rsp, 0), (intptr_t)entry_name(ek));
349 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub), 5);
350 __ pop(rdi); __ pop(rsi); __ pop(rdx); __ pop(rcx); __ pop(rbx); __ pop(rax);
351 }
352 #endif //PRODUCT
353
354 switch ((int) ek) {
355 case _raise_exception:
356 {
357 // Not a real MH entry, but rather shared code for raising an exception.
358 // Extra local arguments are pushed on stack, as required type at TOS+8,
359 // failing object (or NULL) at TOS+4, failing bytecode type at TOS.
360 // Beyond those local arguments are the PC, of course.
361 Register rdx_code = rdx_temp;
362 Register rcx_fail = rcx_recv;
363 Register rax_want = rax_argslot;
364 Register rdi_pc = rdi;
365 __ pop(rdx_code); // TOS+0
366 __ pop(rcx_fail); // TOS+4
367 __ pop(rax_want); // TOS+8
368 __ pop(rdi_pc); // caller PC
369
370 __ mov(rsp, rsi); // cut the stack back to where the caller started
371
372 // Repush the arguments as if coming from the interpreter.
373 if (TaggedStackInterpreter) __ push(frame::tag_for_basic_type(T_INT));
374 __ push(rdx_code);
375 if (TaggedStackInterpreter) __ push(frame::tag_for_basic_type(T_OBJECT));
376 __ push(rcx_fail);
377 if (TaggedStackInterpreter) __ push(frame::tag_for_basic_type(T_OBJECT));
378 __ push(rax_want);
379
380 Register rbx_method = rbx_temp;
381 Label no_method;
382 // FIXME: fill in _raise_exception_method with a suitable sun.dyn method
383 __ movptr(rbx_method, ExternalAddress((address) &_raise_exception_method));
384 __ testptr(rbx_method, rbx_method);
385 __ jcc(Assembler::zero, no_method);
386 int jobject_oop_offset = 0;
387 __ movptr(rbx_method, Address(rbx_method, jobject_oop_offset)); // dereference the jobject
388 __ testptr(rbx_method, rbx_method);
389 __ jcc(Assembler::zero, no_method);
390 __ verify_oop(rbx_method);
391 __ push(rdi_pc); // and restore caller PC
392 __ jmp(rbx_method_fie);
393
394 // If we get here, the Java runtime did not do its job of creating the exception.
395 // Do something that is at least causes a valid throw from the interpreter.
396 __ bind(no_method);
397 __ pop(rax_want);
398 if (TaggedStackInterpreter) __ pop(rcx_fail);
399 __ pop(rcx_fail);
400 __ push(rax_want);
401 __ push(rcx_fail);
402 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
403 }
404 break;
405
406 case _invokestatic_mh:
407 case _invokespecial_mh:
408 {
409 Register rbx_method = rbx_temp;
410 __ movptr(rbx_method, rcx_mh_vmtarget); // target is a methodOop
411 __ verify_oop(rbx_method);
412 // same as TemplateTable::invokestatic or invokespecial,
413 // minus the CP setup and profiling:
414 if (ek == _invokespecial_mh) {
415 // Must load & check the first argument before entering the target method.
416 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
417 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
418 __ null_check(rcx_recv);
419 __ verify_oop(rcx_recv);
420 }
421 __ jmp(rbx_method_fie);
422 }
423 break;
424
425 case _invokevirtual_mh:
426 {
427 // same as TemplateTable::invokevirtual,
428 // minus the CP setup and profiling:
429
430 // pick out the vtable index and receiver offset from the MH,
431 // and then we can discard it:
432 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
433 Register rbx_index = rbx_temp;
434 __ movl(rbx_index, rcx_dmh_vmindex);
435 // Note: The verifier allows us to ignore rcx_mh_vmtarget.
436 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
437 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
438
439 // get receiver klass
440 Register rax_klass = rax_argslot;
441 __ load_klass(rax_klass, rcx_recv);
442 __ verify_oop(rax_klass);
443
444 // get target methodOop & entry point
445 const int base = instanceKlass::vtable_start_offset() * wordSize;
446 assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
447 Address vtable_entry_addr(rax_klass,
448 rbx_index, Address::times_ptr,
449 base + vtableEntry::method_offset_in_bytes());
450 Register rbx_method = rbx_temp;
451 __ movptr(rbx_method, vtable_entry_addr);
452
453 __ verify_oop(rbx_method);
454 __ jmp(rbx_method_fie);
455 }
456 break;
457
458 case _invokeinterface_mh:
459 {
460 // same as TemplateTable::invokeinterface,
461 // minus the CP setup and profiling:
462
463 // pick out the interface and itable index from the MH.
464 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
465 Register rdx_intf = rdx_temp;
466 Register rbx_index = rbx_temp;
467 __ movptr(rdx_intf, rcx_mh_vmtarget);
468 __ movl(rbx_index, rcx_dmh_vmindex);
469 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
470 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
471
472 // get receiver klass
473 Register rax_klass = rax_argslot;
474 __ load_klass(rax_klass, rcx_recv);
475 __ verify_oop(rax_klass);
476
477 Register rdi_temp = rdi;
478 Register rbx_method = rbx_index;
479
480 // get interface klass
481 Label no_such_interface;
482 __ verify_oop(rdx_intf);
483 __ lookup_interface_method(rax_klass, rdx_intf,
484 // note: next two args must be the same:
485 rbx_index, rbx_method,
486 rdi_temp,
487 no_such_interface);
488
489 __ verify_oop(rbx_method);
490 __ jmp(rbx_method_fie);
491 __ hlt();
492
493 __ bind(no_such_interface);
494 // Throw an exception.
495 // For historical reasons, it will be IncompatibleClassChangeError.
496 __ pushptr(Address(rdx_intf, java_mirror_offset)); // required interface
497 __ push(rcx_recv); // bad receiver
498 __ push((int)Bytecodes::_invokeinterface); // who is complaining?
499 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
500 }
501 break;
502
503 case _bound_ref_mh:
504 case _bound_int_mh:
505 case _bound_long_mh:
506 case _bound_ref_direct_mh:
507 case _bound_int_direct_mh:
508 case _bound_long_direct_mh:
509 {
510 bool direct_to_method = (ek >= _bound_ref_direct_mh);
511 BasicType arg_type = T_ILLEGAL;
512 if (ek == _bound_long_mh || ek == _bound_long_direct_mh) {
513 arg_type = T_LONG;
514 } else if (ek == _bound_int_mh || ek == _bound_int_direct_mh) {
515 arg_type = T_INT;
516 } else {
517 assert(ek == _bound_ref_mh || ek == _bound_ref_direct_mh, "must be ref");
518 arg_type = T_OBJECT;
519 }
520 int arg_slots = type2size[arg_type];
521 int arg_mask = (arg_type == T_OBJECT ? _INSERT_REF_MASK :
522 arg_slots == 1 ? _INSERT_INT_MASK : _INSERT_LONG_MASK);
523
524 // make room for the new argument:
525 __ movl(rax_argslot, rcx_bmh_vmargslot);
526 __ lea(rax_argslot, __ argument_address(rax_argslot));
527 insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask,
528 rax_argslot, rbx_temp, rdx_temp);
529
530 // store bound argument into the new stack slot:
531 __ movptr(rbx_temp, rcx_bmh_argument);
532 Address prim_value_addr(rbx_temp, java_lang_boxing_object::value_offset_in_bytes(arg_type));
533 if (arg_type == T_OBJECT) {
534 __ movptr(Address(rax_argslot, 0), rbx_temp);
535 } else {
536 __ load_sized_value(rbx_temp, prim_value_addr,
537 type2aelembytes(arg_type), is_signed_subword_type(arg_type));
538 __ movptr(Address(rax_argslot, 0), rbx_temp);
539 #ifndef _LP64
540 if (arg_slots == 2) {
541 __ movl(rbx_temp, prim_value_addr.plus_disp(wordSize));
542 __ movl(Address(rax_argslot, Interpreter::stackElementSize()), rbx_temp);
543 }
544 #endif //_LP64
545 break;
546 }
547
548 if (direct_to_method) {
549 Register rbx_method = rbx_temp;
550 __ movptr(rbx_method, rcx_mh_vmtarget);
551 __ verify_oop(rbx_method);
552 __ jmp(rbx_method_fie);
553 } else {
554 __ movptr(rcx_recv, rcx_mh_vmtarget);
555 __ verify_oop(rcx_recv);
556 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
557 }
558 }
559 break;
560
561 case _adapter_retype_only:
562 case _adapter_retype_raw:
563 // immediately jump to the next MH layer:
564 __ movptr(rcx_recv, rcx_mh_vmtarget);
565 __ verify_oop(rcx_recv);
566 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
567 // This is OK when all parameter types widen.
568 // It is also OK when a return type narrows.
569 break;
570
571 case _adapter_check_cast:
572 {
573 // temps:
574 Register rbx_klass = rbx_temp; // interesting AMH data
575
576 // check a reference argument before jumping to the next layer of MH:
577 __ movl(rax_argslot, rcx_amh_vmargslot);
578 vmarg = __ argument_address(rax_argslot);
579
580 // What class are we casting to?
581 __ movptr(rbx_klass, rcx_amh_argument); // this is a Class object!
582 __ movptr(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
583
584 Label done;
585 __ movptr(rdx_temp, vmarg);
586 __ testl(rdx_temp, rdx_temp);
587 __ jcc(Assembler::zero, done); // no cast if null
588 __ load_klass(rdx_temp, rdx_temp);
589
590 // live at this point:
591 // - rbx_klass: klass required by the target method
592 // - rdx_temp: argument klass to test
593 // - rcx_recv: adapter method handle
594 __ check_klass_subtype(rdx_temp, rbx_klass, rax_argslot, done);
595
596 // If we get here, the type check failed!
597 // Call the wrong_method_type stub, passing the failing argument type in rax.
598 Register rax_mtype = rax_argslot;
599 __ movl(rax_argslot, rcx_amh_vmargslot); // reload argslot field
600 __ movptr(rdx_temp, vmarg);
601
602 __ pushptr(rcx_amh_argument); // required class
603 __ push(rdx_temp); // bad object
604 __ push((int)Bytecodes::_checkcast); // who is complaining?
605 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
606
607 __ bind(done);
608 // get the new MH:
609 __ movptr(rcx_recv, rcx_mh_vmtarget);
610 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
611 }
612 break;
613
614 case _adapter_prim_to_prim:
615 case _adapter_ref_to_prim:
616 // handled completely by optimized cases
617 __ stop("init_AdapterMethodHandle should not issue this");
618 break;
619
620 case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
621 //case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
622 case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
623 case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
624 {
625 // perform an in-place conversion to int or an int subword
626 __ movl(rax_argslot, rcx_amh_vmargslot);
627 vmarg = __ argument_address(rax_argslot);
628
629 switch (ek) {
630 case _adapter_opt_i2i:
631 __ movl(rdx_temp, vmarg);
632 break;
633 case _adapter_opt_l2i:
634 {
635 // just delete the extra slot; on a little-endian machine we keep the first
636 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
637 remove_arg_slots(_masm, -stack_move_unit(),
638 rax_argslot, rbx_temp, rdx_temp);
639 vmarg = Address(rax_argslot, -Interpreter::stackElementSize());
640 __ movl(rdx_temp, vmarg);
641 }
642 break;
643 case _adapter_opt_unboxi:
644 {
645 // Load the value up from the heap.
646 __ movptr(rdx_temp, vmarg);
647 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
648 #ifdef ASSERT
649 for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
650 if (is_subword_type(BasicType(bt)))
651 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
652 }
653 #endif
654 __ null_check(rdx_temp, value_offset);
655 __ movl(rdx_temp, Address(rdx_temp, value_offset));
656 // We load this as a word. Because we are little-endian,
657 // the low bits will be correct, but the high bits may need cleaning.
658 // The vminfo will guide us to clean those bits.
659 }
660 break;
661 default:
662 assert(false, "");
663 }
664 goto finish_int_conversion;
665 }
666
667 finish_int_conversion:
668 {
669 Register rbx_vminfo = rbx_temp;
670 __ movl(rbx_vminfo, rcx_amh_conversion);
671 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
672
673 // get the new MH:
674 __ movptr(rcx_recv, rcx_mh_vmtarget);
675 // (now we are done with the old MH)
676
677 // original 32-bit vmdata word must be of this form:
678 // | MBZ:16 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
679 __ xchgl(rcx, rbx_vminfo); // free rcx for shifts
680 __ shll(rdx_temp /*, rcx*/);
681 Label zero_extend, done;
682 __ testl(rcx, CONV_VMINFO_SIGN_FLAG);
683 __ jcc(Assembler::zero, zero_extend);
684
685 // this path is taken for int->byte, int->short
686 __ sarl(rdx_temp /*, rcx*/);
687 __ jmp(done);
688
689 __ bind(zero_extend);
690 // this is taken for int->char
691 __ shrl(rdx_temp /*, rcx*/);
692
693 __ bind(done);
694 __ movptr(vmarg, rdx_temp);
695 __ xchgl(rcx, rbx_vminfo); // restore rcx_recv
696
697 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
698 }
699 break;
700
701 case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
702 case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
703 {
704 // perform an in-place int-to-long or ref-to-long conversion
705 __ movl(rax_argslot, rcx_amh_vmargslot);
706
707 // on a little-endian machine we keep the first slot and add another after
708 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
709 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
710 rax_argslot, rbx_temp, rdx_temp);
711 Address vmarg1(rax_argslot, -Interpreter::stackElementSize());
712 Address vmarg2 = vmarg1.plus_disp(Interpreter::stackElementSize());
713
714 switch (ek) {
715 case _adapter_opt_i2l:
716 {
717 __ movl(rdx_temp, vmarg1);
718 __ sarl(rdx_temp, 31); // __ extend_sign()
719 __ movl(vmarg2, rdx_temp); // store second word
720 }
721 break;
722 case _adapter_opt_unboxl:
723 {
724 // Load the value up from the heap.
725 __ movptr(rdx_temp, vmarg1);
726 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
727 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
728 __ null_check(rdx_temp, value_offset);
729 __ movl(rbx_temp, Address(rdx_temp, value_offset + 0*BytesPerInt));
730 __ movl(rdx_temp, Address(rdx_temp, value_offset + 1*BytesPerInt));
731 __ movl(vmarg1, rbx_temp);
732 __ movl(vmarg2, rdx_temp);
733 }
734 break;
735 default:
736 assert(false, "");
737 }
738
739 __ movptr(rcx_recv, rcx_mh_vmtarget);
740 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
741 }
742 break;
743
744 case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
745 case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
746 {
747 // perform an in-place floating primitive conversion
748 __ movl(rax_argslot, rcx_amh_vmargslot);
749 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
750 if (ek == _adapter_opt_f2d) {
751 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
752 rax_argslot, rbx_temp, rdx_temp);
753 }
754 Address vmarg(rax_argslot, -Interpreter::stackElementSize());
755
756 #ifdef _LP64
757 if (ek == _adapter_opt_f2d) {
758 __ movflt(xmm0, vmarg);
759 __ cvtss2sd(xmm0, xmm0);
760 __ movdbl(vmarg, xmm0);
761 } else {
762 __ movdbl(xmm0, vmarg);
763 __ cvtsd2ss(xmm0, xmm0);
764 __ movflt(vmarg, xmm0);
765 }
766 #else //_LP64
767 if (ek == _adapter_opt_f2d) {
768 __ fld_s(vmarg); // load float to ST0
769 __ fstp_s(vmarg); // store single
770 } else if (!TaggedStackInterpreter) {
771 __ fld_d(vmarg); // load double to ST0
772 __ fstp_s(vmarg); // store single
773 } else {
774 Address vmarg_tag = vmarg.plus_disp(tag_offset);
775 Address vmarg2 = vmarg.plus_disp(Interpreter::stackElementSize());
776 // vmarg2_tag does not participate in this code
777 Register rbx_tag = rbx_temp;
778 __ movl(rbx_tag, vmarg_tag); // preserve tag
779 __ movl(rdx_temp, vmarg2); // get second word of double
780 __ movl(vmarg_tag, rdx_temp); // align with first word
781 __ fld_d(vmarg); // load double to ST0
782 __ movl(vmarg_tag, rbx_tag); // restore tag
783 __ fstp_s(vmarg); // store single
784 }
785 #endif //_LP64
786
787 if (ek == _adapter_opt_d2f) {
788 remove_arg_slots(_masm, -stack_move_unit(),
789 rax_argslot, rbx_temp, rdx_temp);
790 }
791
792 __ movptr(rcx_recv, rcx_mh_vmtarget);
793 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
794 }
795 break;
796
797 case _adapter_prim_to_ref:
798 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
799 break;
800
801 case _adapter_swap_args:
802 case _adapter_rot_args:
803 // handled completely by optimized cases
804 __ stop("init_AdapterMethodHandle should not issue this");
805 break;
806
807 case _adapter_opt_swap_1:
808 case _adapter_opt_swap_2:
809 case _adapter_opt_rot_1_up:
810 case _adapter_opt_rot_1_down:
811 case _adapter_opt_rot_2_up:
812 case _adapter_opt_rot_2_down:
813 {
814 int rotate = 0, swap_slots = 0;
815 switch ((int)ek) {
816 case _adapter_opt_swap_1: swap_slots = 1; break;
817 case _adapter_opt_swap_2: swap_slots = 2; break;
818 case _adapter_opt_rot_1_up: swap_slots = 1; rotate++; break;
819 case _adapter_opt_rot_1_down: swap_slots = 1; rotate--; break;
820 case _adapter_opt_rot_2_up: swap_slots = 2; rotate++; break;
821 case _adapter_opt_rot_2_down: swap_slots = 2; rotate--; break;
822 default: assert(false, "");
823 }
824
825 // the real size of the move must be doubled if TaggedStackInterpreter:
826 int swap_bytes = (int)( swap_slots * Interpreter::stackElementWords() * wordSize );
827
828 // 'argslot' is the position of the first argument to swap
829 __ movl(rax_argslot, rcx_amh_vmargslot);
830 __ lea(rax_argslot, __ argument_address(rax_argslot));
831
832 // 'vminfo' is the second
833 Register rbx_destslot = rbx_temp;
834 __ movl(rbx_destslot, rcx_amh_conversion);
835 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
836 __ andl(rbx_destslot, CONV_VMINFO_MASK);
837 __ lea(rbx_destslot, __ argument_address(rbx_destslot));
838 DEBUG_ONLY(verify_argslot(_masm, rbx_destslot, "swap point must fall within current frame"));
839
840 if (!rotate) {
841 for (int i = 0; i < swap_bytes; i += wordSize) {
842 __ movptr(rdx_temp, Address(rax_argslot , i));
843 __ push(rdx_temp);
844 __ movptr(rdx_temp, Address(rbx_destslot, i));
845 __ movptr(Address(rax_argslot, i), rdx_temp);
846 __ pop(rdx_temp);
847 __ movptr(Address(rbx_destslot, i), rdx_temp);
848 }
849 } else {
850 // push the first chunk, which is going to get overwritten
851 for (int i = swap_bytes; (i -= wordSize) >= 0; ) {
852 __ movptr(rdx_temp, Address(rax_argslot, i));
853 __ push(rdx_temp);
854 }
855
856 if (rotate > 0) {
857 // rotate upward
858 __ subptr(rax_argslot, swap_bytes);
859 #ifdef ASSERT
860 {
861 // Verify that argslot > destslot, by at least swap_bytes.
862 Label L_ok;
863 __ cmpptr(rax_argslot, rbx_destslot);
864 __ jcc(Assembler::aboveEqual, L_ok);
865 __ stop("source must be above destination (upward rotation)");
866 __ bind(L_ok);
867 }
868 #endif
869 // work argslot down to destslot, copying contiguous data upwards
870 // pseudo-code:
871 // rax = src_addr - swap_bytes
872 // rbx = dest_addr
873 // while (rax >= rbx) *(rax + swap_bytes) = *(rax + 0), rax--;
874 Label loop;
875 __ bind(loop);
876 __ movptr(rdx_temp, Address(rax_argslot, 0));
877 __ movptr(Address(rax_argslot, swap_bytes), rdx_temp);
878 __ addptr(rax_argslot, -wordSize);
879 __ cmpptr(rax_argslot, rbx_destslot);
880 __ jcc(Assembler::aboveEqual, loop);
881 } else {
882 __ addptr(rax_argslot, swap_bytes);
883 #ifdef ASSERT
884 {
885 // Verify that argslot < destslot, by at least swap_bytes.
886 Label L_ok;
887 __ cmpptr(rax_argslot, rbx_destslot);
888 __ jcc(Assembler::belowEqual, L_ok);
889 __ stop("source must be below destination (downward rotation)");
890 __ bind(L_ok);
891 }
892 #endif
893 // work argslot up to destslot, copying contiguous data downwards
894 // pseudo-code:
895 // rax = src_addr + swap_bytes
896 // rbx = dest_addr
897 // while (rax <= rbx) *(rax - swap_bytes) = *(rax + 0), rax++;
898 Label loop;
899 __ bind(loop);
900 __ movptr(rdx_temp, Address(rax_argslot, 0));
901 __ movptr(Address(rax_argslot, -swap_bytes), rdx_temp);
902 __ addptr(rax_argslot, wordSize);
903 __ cmpptr(rax_argslot, rbx_destslot);
904 __ jcc(Assembler::belowEqual, loop);
905 }
906
907 // pop the original first chunk into the destination slot, now free
908 for (int i = 0; i < swap_bytes; i += wordSize) {
909 __ pop(rdx_temp);
910 __ movptr(Address(rbx_destslot, i), rdx_temp);
911 }
912 }
913
914 __ movptr(rcx_recv, rcx_mh_vmtarget);
915 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
916 }
917 break;
918
919 case _adapter_dup_args:
920 {
921 // 'argslot' is the position of the first argument to duplicate
922 __ movl(rax_argslot, rcx_amh_vmargslot);
923 __ lea(rax_argslot, __ argument_address(rax_argslot));
924
925 // 'stack_move' is negative number of words to duplicate
926 Register rdx_stack_move = rdx_temp;
927 __ movl(rdx_stack_move, rcx_amh_conversion);
928 __ sarl(rdx_stack_move, CONV_STACK_MOVE_SHIFT);
929
930 int argslot0_num = 0;
931 Address argslot0 = __ argument_address(RegisterOrConstant(argslot0_num));
932 assert(argslot0.base() == rsp, "");
933 int pre_arg_size = argslot0.disp();
934 assert(pre_arg_size % wordSize == 0, "");
935 assert(pre_arg_size > 0, "must include PC");
936
937 // remember the old rsp+1 (argslot[0])
938 Register rbx_oldarg = rbx_temp;
939 __ lea(rbx_oldarg, argslot0);
940
941 // move rsp down to make room for dups
942 __ lea(rsp, Address(rsp, rdx_stack_move, Address::times_ptr));
943
944 // compute the new rsp+1 (argslot[0])
945 Register rdx_newarg = rdx_temp;
946 __ lea(rdx_newarg, argslot0);
947
948 __ push(rdi); // need a temp
949 // (preceding push must be done after arg addresses are taken!)
950
951 // pull down the pre_arg_size data (PC)
952 for (int i = -pre_arg_size; i < 0; i += wordSize) {
953 __ movptr(rdi, Address(rbx_oldarg, i));
954 __ movptr(Address(rdx_newarg, i), rdi);
955 }
956
957 // copy from rax_argslot[0...] down to new_rsp[1...]
958 // pseudo-code:
959 // rbx = old_rsp+1
960 // rdx = new_rsp+1
961 // rax = argslot
962 // while (rdx < rbx) *rdx++ = *rax++
963 Label loop;
964 __ bind(loop);
965 __ movptr(rdi, Address(rax_argslot, 0));
966 __ movptr(Address(rdx_newarg, 0), rdi);
967 __ addptr(rax_argslot, wordSize);
968 __ addptr(rdx_newarg, wordSize);
969 __ cmpptr(rdx_newarg, rbx_oldarg);
970 __ jcc(Assembler::less, loop);
971
972 __ pop(rdi); // restore temp
973
974 __ movptr(rcx_recv, rcx_mh_vmtarget);
975 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
976 }
977 break;
978
979 case _adapter_drop_args:
980 {
981 // 'argslot' is the position of the first argument to nuke
982 __ movl(rax_argslot, rcx_amh_vmargslot);
983 __ lea(rax_argslot, __ argument_address(rax_argslot));
984
985 __ push(rdi); // need a temp
986 // (must do previous push after argslot address is taken)
987
988 // 'stack_move' is number of words to drop
989 Register rdi_stack_move = rdi;
990 __ movl(rdi_stack_move, rcx_amh_conversion);
991 __ sarl(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
992 remove_arg_slots(_masm, rdi_stack_move,
993 rax_argslot, rbx_temp, rdx_temp);
994
995 __ pop(rdi); // restore temp
996
997 __ movptr(rcx_recv, rcx_mh_vmtarget);
998 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
999 }
1000 break;
1001
1002 case _adapter_collect_args:
1003 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1004 break;
1005
1006 case _adapter_spread_args:
1007 // handled completely by optimized cases
1008 __ stop("init_AdapterMethodHandle should not issue this");
1009 break;
1010
1011 case _adapter_opt_spread_0:
1012 case _adapter_opt_spread_1:
1013 case _adapter_opt_spread_more:
1014 {
1015 // spread an array out into a group of arguments
1016 int length_constant = -1;
1017 switch (ek) {
1018 case _adapter_opt_spread_0: length_constant = 0; break;
1019 case _adapter_opt_spread_1: length_constant = 1; break;
1020 }
1021
1022 // find the address of the array argument
1023 __ movl(rax_argslot, rcx_amh_vmargslot);
1024 __ lea(rax_argslot, __ argument_address(rax_argslot));
1025
1026 // grab some temps
1027 { __ push(rsi); __ push(rdi); }
1028 // (preceding pushes must be done after argslot address is taken!)
1029 #define UNPUSH_RSI_RDI \
1030 { __ pop(rdi); __ pop(rsi); }
1031
1032 // arx_argslot points both to the array and to the first output arg
1033 vmarg = Address(rax_argslot, 0);
1034
1035 // Get the array value.
1036 Register rsi_array = rsi;
1037 Register rdx_array_klass = rdx_temp;
1038 BasicType elem_type = T_OBJECT;
1039 int length_offset = arrayOopDesc::length_offset_in_bytes();
1040 int elem0_offset = arrayOopDesc::base_offset_in_bytes(elem_type);
1041 __ movptr(rsi_array, vmarg);
1042 Label skip_array_check;
1043 if (length_constant == 0) {
1044 __ testptr(rsi_array, rsi_array);
1045 __ jcc(Assembler::zero, skip_array_check);
1046 }
1047 __ null_check(rsi_array, oopDesc::klass_offset_in_bytes());
1048 __ load_klass(rdx_array_klass, rsi_array);
1049
1050 // Check the array type.
1051 Register rbx_klass = rbx_temp;
1052 __ movptr(rbx_klass, rcx_amh_argument); // this is a Class object!
1053 __ movptr(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
1054
1055 Label ok_array_klass, bad_array_klass, bad_array_length;
1056 __ check_klass_subtype(rdx_array_klass, rbx_klass, rdi, ok_array_klass);
1057 // If we get here, the type check failed!
1058 __ jmp(bad_array_klass);
1059 __ bind(ok_array_klass);
1060
1061 // Check length.
1062 if (length_constant >= 0) {
1063 __ cmpl(Address(rsi_array, length_offset), length_constant);
1064 } else {
1065 Register rbx_vminfo = rbx_temp;
1066 __ movl(rbx_vminfo, rcx_amh_conversion);
1067 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
1068 __ andl(rbx_vminfo, CONV_VMINFO_MASK);
1069 __ cmpl(rbx_vminfo, Address(rsi_array, length_offset));
1070 }
1071 __ jcc(Assembler::notEqual, bad_array_length);
1072
1073 Register rdx_argslot_limit = rdx_temp;
1074
1075 // Array length checks out. Now insert any required stack slots.
1076 if (length_constant == -1) {
1077 // Form a pointer to the end of the affected region.
1078 __ lea(rdx_argslot_limit, Address(rax_argslot, Interpreter::stackElementSize()));
1079 // 'stack_move' is negative number of words to insert
1080 Register rdi_stack_move = rdi;
1081 __ movl(rdi_stack_move, rcx_amh_conversion);
1082 __ sarl(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1083 Register rsi_temp = rsi_array; // spill this
1084 insert_arg_slots(_masm, rdi_stack_move, -1,
1085 rax_argslot, rbx_temp, rsi_temp);
1086 // reload the array (since rsi was killed)
1087 __ movptr(rsi_array, vmarg);
1088 } else if (length_constant > 1) {
1089 int arg_mask = 0;
1090 int new_slots = (length_constant - 1);
1091 for (int i = 0; i < new_slots; i++) {
1092 arg_mask <<= 1;
1093 arg_mask |= _INSERT_REF_MASK;
1094 }
1095 insert_arg_slots(_masm, new_slots * stack_move_unit(), arg_mask,
1096 rax_argslot, rbx_temp, rdx_temp);
1097 } else if (length_constant == 1) {
1098 // no stack resizing required
1099 } else if (length_constant == 0) {
1100 remove_arg_slots(_masm, -stack_move_unit(),
1101 rax_argslot, rbx_temp, rdx_temp);
1102 }
1103
1104 // Copy from the array to the new slots.
1105 // Note: Stack change code preserves integrity of rax_argslot pointer.
1106 // So even after slot insertions, rax_argslot still points to first argument.
1107 if (length_constant == -1) {
1108 // [rax_argslot, rdx_argslot_limit) is the area we are inserting into.
1109 Register rsi_source = rsi_array;
1110 __ lea(rsi_source, Address(rsi_array, elem0_offset));
1111 Label loop;
1112 __ bind(loop);
1113 __ movptr(rbx_temp, Address(rsi_source, 0));
1114 __ movptr(Address(rax_argslot, 0), rbx_temp);
1115 __ addptr(rsi_source, type2aelembytes(elem_type));
1116 if (TaggedStackInterpreter) {
1117 __ movptr(Address(rax_argslot, tag_offset),
1118 frame::tag_for_basic_type(elem_type));
1119 }
1120 __ addptr(rax_argslot, Interpreter::stackElementSize());
1121 __ cmpptr(rax_argslot, rdx_argslot_limit);
1122 __ jcc(Assembler::less, loop);
1123 } else if (length_constant == 0) {
1124 __ bind(skip_array_check);
1125 // nothing to copy
1126 } else {
1127 int elem_offset = elem0_offset;
1128 int slot_offset = 0;
1129 for (int index = 0; index < length_constant; index++) {
1130 __ movptr(rbx_temp, Address(rsi_array, elem_offset));
1131 __ movptr(Address(rax_argslot, slot_offset), rbx_temp);
1132 elem_offset += type2aelembytes(elem_type);
1133 if (TaggedStackInterpreter) {
1134 __ movptr(Address(rax_argslot, slot_offset + tag_offset),
1135 frame::tag_for_basic_type(elem_type));
1136 }
1137 slot_offset += Interpreter::stackElementSize();
1138 }
1139 }
1140
1141 // Arguments are spread. Move to next method handle.
1142 UNPUSH_RSI_RDI;
1143 __ movptr(rcx_recv, rcx_mh_vmtarget);
1144 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1145
1146 __ bind(bad_array_klass);
1147 UNPUSH_RSI_RDI;
1148 __ pushptr(Address(rdx_array_klass, java_mirror_offset)); // required type
1149 __ pushptr(vmarg); // bad array
1150 __ push((int)Bytecodes::_aaload); // who is complaining?
1151 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1152
1153 __ bind(bad_array_length);
1154 UNPUSH_RSI_RDI;
1155 __ push(rcx_recv); // AMH requiring a certain length
1156 __ pushptr(vmarg); // bad array
1157 __ push((int)Bytecodes::_arraylength); // who is complaining?
1158 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1159
1160 #undef UNPUSH_RSI_RDI
1161 }
1162 break;
1163
1164 case _adapter_flyby:
1165 case _adapter_ricochet:
1166 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1167 break;
1168
1169 default: ShouldNotReachHere();
1170 }
1171 __ hlt();
1172
1173 address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
1174 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1175
1176 init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
1177 }