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 extern "C" void print_method_handle(oopDesc* mh);
272 void trace_method_handle_stub(const char* adaptername,
273 oopDesc* mh,
274 intptr_t* entry_sp,
275 intptr_t* saved_sp,
276 intptr_t* saved_bp) {
277 // called as a leaf from native code: do not block the JVM!
278 intptr_t* last_sp = (intptr_t*) saved_bp[frame::interpreter_frame_last_sp_offset];
279 intptr_t* base_sp = (intptr_t*) saved_bp[frame::interpreter_frame_monitor_block_top_offset];
280 printf("MH %s mh="INTPTR_FORMAT" sp=("INTPTR_FORMAT"+"INTX_FORMAT") stack_size="INTX_FORMAT" bp="INTPTR_FORMAT"\n",
281 adaptername, (intptr_t)mh, (intptr_t)entry_sp, (intptr_t)(saved_sp - entry_sp), (intptr_t)(base_sp - last_sp), (intptr_t)saved_bp);
282 if (last_sp != saved_sp)
283 printf("*** last_sp="INTPTR_FORMAT"\n", (intptr_t)last_sp);
284 if (Verbose) print_method_handle(mh);
285 }
286 #endif //PRODUCT
287
288 // Generate an "entry" field for a method handle.
289 // This determines how the method handle will respond to calls.
290 void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
291 // Here is the register state during an interpreted call,
292 // as set up by generate_method_handle_interpreter_entry():
293 // - rbx: garbage temp (was MethodHandle.invoke methodOop, unused)
294 // - rcx: receiver method handle
295 // - rax: method handle type (only used by the check_mtype entry point)
296 // - rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
297 // - rdx: garbage temp, can blow away
298
299 Register rcx_recv = rcx;
300 Register rax_argslot = rax;
301 Register rbx_temp = rbx;
302 Register rdx_temp = rdx;
303
304 // This guy is set up by prepare_to_jump_from_interpreted (from interpreted calls)
305 // and gen_c2i_adapter (from compiled calls):
306 Register saved_last_sp = LP64_ONLY(r13) NOT_LP64(rsi);
307
308 guarantee(java_dyn_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
309
310 // some handy addresses
311 Address rbx_method_fie( rbx, methodOopDesc::from_interpreted_offset() );
312
313 Address rcx_mh_vmtarget( rcx_recv, java_dyn_MethodHandle::vmtarget_offset_in_bytes() );
314 Address rcx_dmh_vmindex( rcx_recv, sun_dyn_DirectMethodHandle::vmindex_offset_in_bytes() );
315
316 Address rcx_bmh_vmargslot( rcx_recv, sun_dyn_BoundMethodHandle::vmargslot_offset_in_bytes() );
317 Address rcx_bmh_argument( rcx_recv, sun_dyn_BoundMethodHandle::argument_offset_in_bytes() );
318
319 Address rcx_amh_vmargslot( rcx_recv, sun_dyn_AdapterMethodHandle::vmargslot_offset_in_bytes() );
320 Address rcx_amh_argument( rcx_recv, sun_dyn_AdapterMethodHandle::argument_offset_in_bytes() );
321 Address rcx_amh_conversion( rcx_recv, sun_dyn_AdapterMethodHandle::conversion_offset_in_bytes() );
322 Address vmarg; // __ argument_address(vmargslot)
323
324 int tag_offset = -1;
325 if (TaggedStackInterpreter) {
326 tag_offset = Interpreter::tag_offset_in_bytes() - Interpreter::value_offset_in_bytes();
327 assert(tag_offset = wordSize, "stack grows as expected");
328 }
329
330 const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
331
332 if (have_entry(ek)) {
333 __ nop(); // empty stubs make SG sick
334 return;
335 }
336
337 address interp_entry = __ pc();
338 if (UseCompressedOops) __ unimplemented("UseCompressedOops");
339
340 #ifndef PRODUCT
341 if (TraceMethodHandles) {
342 __ push(rax); __ push(rbx); __ push(rcx); __ push(rdx); __ push(rsi); __ push(rdi);
343 __ lea(rax, Address(rsp, wordSize*6)); // entry_sp
344 // arguments:
345 __ push(rbp); // interpreter frame pointer
346 __ push(rsi); // saved_sp
347 __ push(rax); // entry_sp
348 __ push(rcx); // mh
349 __ push(rcx);
350 __ movptr(Address(rsp, 0), (intptr_t)entry_name(ek));
351 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub), 5);
352 __ pop(rdi); __ pop(rsi); __ pop(rdx); __ pop(rcx); __ pop(rbx); __ pop(rax);
353 }
354 #endif //PRODUCT
355
356 switch ((int) ek) {
357 case _raise_exception:
358 {
359 // Not a real MH entry, but rather shared code for raising an exception.
360 // Extra local arguments are pushed on stack, as required type at TOS+8,
361 // failing object (or NULL) at TOS+4, failing bytecode type at TOS.
362 // Beyond those local arguments are the PC, of course.
363 Register rdx_code = rdx_temp;
364 Register rcx_fail = rcx_recv;
365 Register rax_want = rax_argslot;
366 Register rdi_pc = rdi;
367 __ pop(rdx_code); // TOS+0
368 __ pop(rcx_fail); // TOS+4
369 __ pop(rax_want); // TOS+8
370 __ pop(rdi_pc); // caller PC
371
372 __ mov(rsp, rsi); // cut the stack back to where the caller started
373
374 // Repush the arguments as if coming from the interpreter.
375 if (TaggedStackInterpreter) __ push(frame::tag_for_basic_type(T_INT));
376 __ push(rdx_code);
377 if (TaggedStackInterpreter) __ push(frame::tag_for_basic_type(T_OBJECT));
378 __ push(rcx_fail);
379 if (TaggedStackInterpreter) __ push(frame::tag_for_basic_type(T_OBJECT));
380 __ push(rax_want);
381
382 Register rbx_method = rbx_temp;
383 Label no_method;
384 // FIXME: fill in _raise_exception_method with a suitable sun.dyn method
385 __ movptr(rbx_method, ExternalAddress((address) &_raise_exception_method));
386 __ testptr(rbx_method, rbx_method);
387 __ jcc(Assembler::zero, no_method);
388 int jobject_oop_offset = 0;
389 __ movptr(rbx_method, Address(rbx_method, jobject_oop_offset)); // dereference the jobject
390 __ testptr(rbx_method, rbx_method);
391 __ jcc(Assembler::zero, no_method);
392 __ verify_oop(rbx_method);
393 __ push(rdi_pc); // and restore caller PC
394 __ jmp(rbx_method_fie);
395
396 // If we get here, the Java runtime did not do its job of creating the exception.
397 // Do something that is at least causes a valid throw from the interpreter.
398 __ bind(no_method);
399 __ pop(rax_want);
400 if (TaggedStackInterpreter) __ pop(rcx_fail);
401 __ pop(rcx_fail);
402 __ push(rax_want);
403 __ push(rcx_fail);
404 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
405 }
406 break;
407
408 case _invokestatic_mh:
409 case _invokespecial_mh:
410 {
411 Register rbx_method = rbx_temp;
412 __ movptr(rbx_method, rcx_mh_vmtarget); // target is a methodOop
413 __ verify_oop(rbx_method);
414 // same as TemplateTable::invokestatic or invokespecial,
415 // minus the CP setup and profiling:
416 if (ek == _invokespecial_mh) {
417 // Must load & check the first argument before entering the target method.
418 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
419 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
420 __ null_check(rcx_recv);
421 __ verify_oop(rcx_recv);
422 }
423 __ jmp(rbx_method_fie);
424 }
425 break;
426
427 case _invokevirtual_mh:
428 {
429 // same as TemplateTable::invokevirtual,
430 // minus the CP setup and profiling:
431
432 // pick out the vtable index and receiver offset from the MH,
433 // and then we can discard it:
434 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
435 Register rbx_index = rbx_temp;
436 __ movl(rbx_index, rcx_dmh_vmindex);
437 // Note: The verifier allows us to ignore rcx_mh_vmtarget.
438 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
439 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
440
441 // get receiver klass
442 Register rax_klass = rax_argslot;
443 __ load_klass(rax_klass, rcx_recv);
444 __ verify_oop(rax_klass);
445
446 // get target methodOop & entry point
447 const int base = instanceKlass::vtable_start_offset() * wordSize;
448 assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
449 Address vtable_entry_addr(rax_klass,
450 rbx_index, Address::times_ptr,
451 base + vtableEntry::method_offset_in_bytes());
452 Register rbx_method = rbx_temp;
453 __ movptr(rbx_method, vtable_entry_addr);
454
455 __ verify_oop(rbx_method);
456 __ jmp(rbx_method_fie);
457 }
458 break;
459
460 case _invokeinterface_mh:
461 {
462 // same as TemplateTable::invokeinterface,
463 // minus the CP setup and profiling:
464
465 // pick out the interface and itable index from the MH.
466 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
467 Register rdx_intf = rdx_temp;
468 Register rbx_index = rbx_temp;
469 __ movptr(rdx_intf, rcx_mh_vmtarget);
470 __ movl(rbx_index, rcx_dmh_vmindex);
471 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
472 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
473
474 // get receiver klass
475 Register rax_klass = rax_argslot;
476 __ load_klass(rax_klass, rcx_recv);
477 __ verify_oop(rax_klass);
478
479 Register rdi_temp = rdi;
480 Register rbx_method = rbx_index;
481
482 // get interface klass
483 Label no_such_interface;
484 __ verify_oop(rdx_intf);
485 __ lookup_interface_method(rax_klass, rdx_intf,
486 // note: next two args must be the same:
487 rbx_index, rbx_method,
488 rdi_temp,
489 no_such_interface);
490
491 __ verify_oop(rbx_method);
492 __ jmp(rbx_method_fie);
493 __ hlt();
494
495 __ bind(no_such_interface);
496 // Throw an exception.
497 // For historical reasons, it will be IncompatibleClassChangeError.
498 __ pushptr(Address(rdx_intf, java_mirror_offset)); // required interface
499 __ push(rcx_recv); // bad receiver
500 __ push((int)Bytecodes::_invokeinterface); // who is complaining?
501 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
502 }
503 break;
504
505 case _bound_ref_mh:
506 case _bound_int_mh:
507 case _bound_long_mh:
508 case _bound_ref_direct_mh:
509 case _bound_int_direct_mh:
510 case _bound_long_direct_mh:
511 {
512 bool direct_to_method = (ek >= _bound_ref_direct_mh);
513 BasicType arg_type = T_ILLEGAL;
514 if (ek == _bound_long_mh || ek == _bound_long_direct_mh) {
515 arg_type = T_LONG;
516 } else if (ek == _bound_int_mh || ek == _bound_int_direct_mh) {
517 arg_type = T_INT;
518 } else {
519 assert(ek == _bound_ref_mh || ek == _bound_ref_direct_mh, "must be ref");
520 arg_type = T_OBJECT;
521 }
522 int arg_slots = type2size[arg_type];
523 int arg_mask = (arg_type == T_OBJECT ? _INSERT_REF_MASK :
524 arg_slots == 1 ? _INSERT_INT_MASK : _INSERT_LONG_MASK);
525
526 // make room for the new argument:
527 __ movl(rax_argslot, rcx_bmh_vmargslot);
528 __ lea(rax_argslot, __ argument_address(rax_argslot));
529 insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask,
530 rax_argslot, rbx_temp, rdx_temp);
531
532 // store bound argument into the new stack slot:
533 __ movptr(rbx_temp, rcx_bmh_argument);
534 Address prim_value_addr(rbx_temp, java_lang_boxing_object::value_offset_in_bytes(arg_type));
535 if (arg_type == T_OBJECT) {
536 __ movptr(Address(rax_argslot, 0), rbx_temp);
537 } else {
538 __ load_sized_value(rbx_temp, prim_value_addr,
539 type2aelembytes(arg_type), is_signed_subword_type(arg_type));
540 __ movptr(Address(rax_argslot, 0), rbx_temp);
541 #ifndef _LP64
542 if (arg_slots == 2) {
543 __ movl(rbx_temp, prim_value_addr.plus_disp(wordSize));
544 __ movl(Address(rax_argslot, Interpreter::stackElementSize()), rbx_temp);
545 }
546 #endif //_LP64
547 break;
548 }
549
550 if (direct_to_method) {
551 Register rbx_method = rbx_temp;
552 __ movptr(rbx_method, rcx_mh_vmtarget);
553 __ verify_oop(rbx_method);
554 __ jmp(rbx_method_fie);
555 } else {
556 __ movptr(rcx_recv, rcx_mh_vmtarget);
557 __ verify_oop(rcx_recv);
558 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
559 }
560 }
561 break;
562
563 case _adapter_retype_only:
564 case _adapter_retype_raw:
565 // immediately jump to the next MH layer:
566 __ movptr(rcx_recv, rcx_mh_vmtarget);
567 __ verify_oop(rcx_recv);
568 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
569 // This is OK when all parameter types widen.
570 // It is also OK when a return type narrows.
571 break;
572
573 case _adapter_check_cast:
574 {
575 // temps:
576 Register rbx_klass = rbx_temp; // interesting AMH data
577
578 // check a reference argument before jumping to the next layer of MH:
579 __ movl(rax_argslot, rcx_amh_vmargslot);
580 vmarg = __ argument_address(rax_argslot);
581
582 // What class are we casting to?
583 __ movptr(rbx_klass, rcx_amh_argument); // this is a Class object!
584 __ movptr(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
585
586 Label done;
587 __ movptr(rdx_temp, vmarg);
588 __ testl(rdx_temp, rdx_temp);
589 __ jcc(Assembler::zero, done); // no cast if null
590 __ load_klass(rdx_temp, rdx_temp);
591
592 // live at this point:
593 // - rbx_klass: klass required by the target method
594 // - rdx_temp: argument klass to test
595 // - rcx_recv: adapter method handle
596 __ check_klass_subtype(rdx_temp, rbx_klass, rax_argslot, done);
597
598 // If we get here, the type check failed!
599 // Call the wrong_method_type stub, passing the failing argument type in rax.
600 Register rax_mtype = rax_argslot;
601 __ movl(rax_argslot, rcx_amh_vmargslot); // reload argslot field
602 __ movptr(rdx_temp, vmarg);
603
604 __ pushptr(rcx_amh_argument); // required class
605 __ push(rdx_temp); // bad object
606 __ push((int)Bytecodes::_checkcast); // who is complaining?
607 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
608
609 __ bind(done);
610 // get the new MH:
611 __ movptr(rcx_recv, rcx_mh_vmtarget);
612 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
613 }
614 break;
615
616 case _adapter_prim_to_prim:
617 case _adapter_ref_to_prim:
618 // handled completely by optimized cases
619 __ stop("init_AdapterMethodHandle should not issue this");
620 break;
621
622 case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
623 //case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
624 case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
625 case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
626 {
627 // perform an in-place conversion to int or an int subword
628 __ movl(rax_argslot, rcx_amh_vmargslot);
629 vmarg = __ argument_address(rax_argslot);
630
631 switch (ek) {
632 case _adapter_opt_i2i:
633 __ movl(rdx_temp, vmarg);
634 break;
635 case _adapter_opt_l2i:
636 {
637 // just delete the extra slot; on a little-endian machine we keep the first
638 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
639 remove_arg_slots(_masm, -stack_move_unit(),
640 rax_argslot, rbx_temp, rdx_temp);
641 vmarg = Address(rax_argslot, -Interpreter::stackElementSize());
642 __ movl(rdx_temp, vmarg);
643 }
644 break;
645 case _adapter_opt_unboxi:
646 {
647 // Load the value up from the heap.
648 __ movptr(rdx_temp, vmarg);
649 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
650 #ifdef ASSERT
651 for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
652 if (is_subword_type(BasicType(bt)))
653 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
654 }
655 #endif
656 __ null_check(rdx_temp, value_offset);
657 __ movl(rdx_temp, Address(rdx_temp, value_offset));
658 // We load this as a word. Because we are little-endian,
659 // the low bits will be correct, but the high bits may need cleaning.
660 // The vminfo will guide us to clean those bits.
661 }
662 break;
663 default:
664 assert(false, "");
665 }
666 goto finish_int_conversion;
667 }
668
669 finish_int_conversion:
670 {
671 Register rbx_vminfo = rbx_temp;
672 __ movl(rbx_vminfo, rcx_amh_conversion);
673 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
674
675 // get the new MH:
676 __ movptr(rcx_recv, rcx_mh_vmtarget);
677 // (now we are done with the old MH)
678
679 // original 32-bit vmdata word must be of this form:
680 // | MBZ:16 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
681 __ xchgl(rcx, rbx_vminfo); // free rcx for shifts
682 __ shll(rdx_temp /*, rcx*/);
683 Label zero_extend, done;
684 __ testl(rcx, CONV_VMINFO_SIGN_FLAG);
685 __ jcc(Assembler::zero, zero_extend);
686
687 // this path is taken for int->byte, int->short
688 __ sarl(rdx_temp /*, rcx*/);
689 __ jmp(done);
690
691 __ bind(zero_extend);
692 // this is taken for int->char
693 __ shrl(rdx_temp /*, rcx*/);
694
695 __ bind(done);
696 __ movptr(vmarg, rdx_temp);
697 __ xchgl(rcx, rbx_vminfo); // restore rcx_recv
698
699 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
700 }
701 break;
702
703 case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
704 case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
705 {
706 // perform an in-place int-to-long or ref-to-long conversion
707 __ movl(rax_argslot, rcx_amh_vmargslot);
708
709 // on a little-endian machine we keep the first slot and add another after
710 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
711 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
712 rax_argslot, rbx_temp, rdx_temp);
713 Address vmarg1(rax_argslot, -Interpreter::stackElementSize());
714 Address vmarg2 = vmarg1.plus_disp(Interpreter::stackElementSize());
715
716 switch (ek) {
717 case _adapter_opt_i2l:
718 {
719 __ movl(rdx_temp, vmarg1);
720 __ sarl(rdx_temp, 31); // __ extend_sign()
721 __ movl(vmarg2, rdx_temp); // store second word
722 }
723 break;
724 case _adapter_opt_unboxl:
725 {
726 // Load the value up from the heap.
727 __ movptr(rdx_temp, vmarg1);
728 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
729 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
730 __ null_check(rdx_temp, value_offset);
731 __ movl(rbx_temp, Address(rdx_temp, value_offset + 0*BytesPerInt));
732 __ movl(rdx_temp, Address(rdx_temp, value_offset + 1*BytesPerInt));
733 __ movl(vmarg1, rbx_temp);
734 __ movl(vmarg2, rdx_temp);
735 }
736 break;
737 default:
738 assert(false, "");
739 }
740
741 __ movptr(rcx_recv, rcx_mh_vmtarget);
742 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
743 }
744 break;
745
746 case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
747 case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
748 {
749 // perform an in-place floating primitive conversion
750 __ movl(rax_argslot, rcx_amh_vmargslot);
751 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
752 if (ek == _adapter_opt_f2d) {
753 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
754 rax_argslot, rbx_temp, rdx_temp);
755 }
756 Address vmarg(rax_argslot, -Interpreter::stackElementSize());
757
758 #ifdef _LP64
759 if (ek == _adapter_opt_f2d) {
760 __ movflt(xmm0, vmarg);
761 __ cvtss2sd(xmm0, xmm0);
762 __ movdbl(vmarg, xmm0);
763 } else {
764 __ movdbl(xmm0, vmarg);
765 __ cvtsd2ss(xmm0, xmm0);
766 __ movflt(vmarg, xmm0);
767 }
768 #else //_LP64
769 if (ek == _adapter_opt_f2d) {
770 __ fld_s(vmarg); // load float to ST0
771 __ fstp_s(vmarg); // store single
772 } else if (!TaggedStackInterpreter) {
773 __ fld_d(vmarg); // load double to ST0
774 __ fstp_s(vmarg); // store single
775 } else {
776 Address vmarg_tag = vmarg.plus_disp(tag_offset);
777 Address vmarg2 = vmarg.plus_disp(Interpreter::stackElementSize());
778 // vmarg2_tag does not participate in this code
779 Register rbx_tag = rbx_temp;
780 __ movl(rbx_tag, vmarg_tag); // preserve tag
781 __ movl(rdx_temp, vmarg2); // get second word of double
782 __ movl(vmarg_tag, rdx_temp); // align with first word
783 __ fld_d(vmarg); // load double to ST0
784 __ movl(vmarg_tag, rbx_tag); // restore tag
785 __ fstp_s(vmarg); // store single
786 }
787 #endif //_LP64
788
789 if (ek == _adapter_opt_d2f) {
790 remove_arg_slots(_masm, -stack_move_unit(),
791 rax_argslot, rbx_temp, rdx_temp);
792 }
793
794 __ movptr(rcx_recv, rcx_mh_vmtarget);
795 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
796 }
797 break;
798
799 case _adapter_prim_to_ref:
800 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
801 break;
802
803 case _adapter_swap_args:
804 case _adapter_rot_args:
805 // handled completely by optimized cases
806 __ stop("init_AdapterMethodHandle should not issue this");
807 break;
808
809 case _adapter_opt_swap_1:
810 case _adapter_opt_swap_2:
811 case _adapter_opt_rot_1_up:
812 case _adapter_opt_rot_1_down:
813 case _adapter_opt_rot_2_up:
814 case _adapter_opt_rot_2_down:
815 {
816 int rotate = 0, swap_slots = 0;
817 switch ((int)ek) {
818 case _adapter_opt_swap_1: swap_slots = 1; break;
819 case _adapter_opt_swap_2: swap_slots = 2; break;
820 case _adapter_opt_rot_1_up: swap_slots = 1; rotate++; break;
821 case _adapter_opt_rot_1_down: swap_slots = 1; rotate--; break;
822 case _adapter_opt_rot_2_up: swap_slots = 2; rotate++; break;
823 case _adapter_opt_rot_2_down: swap_slots = 2; rotate--; break;
824 default: assert(false, "");
825 }
826
827 // the real size of the move must be doubled if TaggedStackInterpreter:
828 int swap_bytes = (int)( swap_slots * Interpreter::stackElementWords() * wordSize );
829
830 // 'argslot' is the position of the first argument to swap
831 __ movl(rax_argslot, rcx_amh_vmargslot);
832 __ lea(rax_argslot, __ argument_address(rax_argslot));
833
834 // 'vminfo' is the second
835 Register rbx_destslot = rbx_temp;
836 __ movl(rbx_destslot, rcx_amh_conversion);
837 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
838 __ andl(rbx_destslot, CONV_VMINFO_MASK);
839 __ lea(rbx_destslot, __ argument_address(rbx_destslot));
840 DEBUG_ONLY(verify_argslot(_masm, rbx_destslot, "swap point must fall within current frame"));
841
842 if (!rotate) {
843 for (int i = 0; i < swap_bytes; i += wordSize) {
844 __ movptr(rdx_temp, Address(rax_argslot , i));
845 __ push(rdx_temp);
846 __ movptr(rdx_temp, Address(rbx_destslot, i));
847 __ movptr(Address(rax_argslot, i), rdx_temp);
848 __ pop(rdx_temp);
849 __ movptr(Address(rbx_destslot, i), rdx_temp);
850 }
851 } else {
852 // push the first chunk, which is going to get overwritten
853 for (int i = swap_bytes; (i -= wordSize) >= 0; ) {
854 __ movptr(rdx_temp, Address(rax_argslot, i));
855 __ push(rdx_temp);
856 }
857
858 if (rotate > 0) {
859 // rotate upward
860 __ subptr(rax_argslot, swap_bytes);
861 #ifdef ASSERT
862 {
863 // Verify that argslot > destslot, by at least swap_bytes.
864 Label L_ok;
865 __ cmpptr(rax_argslot, rbx_destslot);
866 __ jcc(Assembler::aboveEqual, L_ok);
867 __ stop("source must be above destination (upward rotation)");
868 __ bind(L_ok);
869 }
870 #endif
871 // work argslot down to destslot, copying contiguous data upwards
872 // pseudo-code:
873 // rax = src_addr - swap_bytes
874 // rbx = dest_addr
875 // while (rax >= rbx) *(rax + swap_bytes) = *(rax + 0), rax--;
876 Label loop;
877 __ bind(loop);
878 __ movptr(rdx_temp, Address(rax_argslot, 0));
879 __ movptr(Address(rax_argslot, swap_bytes), rdx_temp);
880 __ addptr(rax_argslot, -wordSize);
881 __ cmpptr(rax_argslot, rbx_destslot);
882 __ jcc(Assembler::aboveEqual, loop);
883 } else {
884 __ addptr(rax_argslot, swap_bytes);
885 #ifdef ASSERT
886 {
887 // Verify that argslot < destslot, by at least swap_bytes.
888 Label L_ok;
889 __ cmpptr(rax_argslot, rbx_destslot);
890 __ jcc(Assembler::belowEqual, L_ok);
891 __ stop("source must be below destination (downward rotation)");
892 __ bind(L_ok);
893 }
894 #endif
895 // work argslot up to destslot, copying contiguous data downwards
896 // pseudo-code:
897 // rax = src_addr + swap_bytes
898 // rbx = dest_addr
899 // while (rax <= rbx) *(rax - swap_bytes) = *(rax + 0), rax++;
900 Label loop;
901 __ bind(loop);
902 __ movptr(rdx_temp, Address(rax_argslot, 0));
903 __ movptr(Address(rax_argslot, -swap_bytes), rdx_temp);
904 __ addptr(rax_argslot, wordSize);
905 __ cmpptr(rax_argslot, rbx_destslot);
906 __ jcc(Assembler::belowEqual, loop);
907 }
908
909 // pop the original first chunk into the destination slot, now free
910 for (int i = 0; i < swap_bytes; i += wordSize) {
911 __ pop(rdx_temp);
912 __ movptr(Address(rbx_destslot, i), rdx_temp);
913 }
914 }
915
916 __ movptr(rcx_recv, rcx_mh_vmtarget);
917 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
918 }
919 break;
920
921 case _adapter_dup_args:
922 {
923 // 'argslot' is the position of the first argument to duplicate
924 __ movl(rax_argslot, rcx_amh_vmargslot);
925 __ lea(rax_argslot, __ argument_address(rax_argslot));
926
927 // 'stack_move' is negative number of words to duplicate
928 Register rdx_stack_move = rdx_temp;
929 __ movl(rdx_stack_move, rcx_amh_conversion);
930 __ sarl(rdx_stack_move, CONV_STACK_MOVE_SHIFT);
931
932 int argslot0_num = 0;
933 Address argslot0 = __ argument_address(RegisterOrConstant(argslot0_num));
934 assert(argslot0.base() == rsp, "");
935 int pre_arg_size = argslot0.disp();
936 assert(pre_arg_size % wordSize == 0, "");
937 assert(pre_arg_size > 0, "must include PC");
938
939 // remember the old rsp+1 (argslot[0])
940 Register rbx_oldarg = rbx_temp;
941 __ lea(rbx_oldarg, argslot0);
942
943 // move rsp down to make room for dups
944 __ lea(rsp, Address(rsp, rdx_stack_move, Address::times_ptr));
945
946 // compute the new rsp+1 (argslot[0])
947 Register rdx_newarg = rdx_temp;
948 __ lea(rdx_newarg, argslot0);
949
950 __ push(rdi); // need a temp
951 // (preceding push must be done after arg addresses are taken!)
952
953 // pull down the pre_arg_size data (PC)
954 for (int i = -pre_arg_size; i < 0; i += wordSize) {
955 __ movptr(rdi, Address(rbx_oldarg, i));
956 __ movptr(Address(rdx_newarg, i), rdi);
957 }
958
959 // copy from rax_argslot[0...] down to new_rsp[1...]
960 // pseudo-code:
961 // rbx = old_rsp+1
962 // rdx = new_rsp+1
963 // rax = argslot
964 // while (rdx < rbx) *rdx++ = *rax++
965 Label loop;
966 __ bind(loop);
967 __ movptr(rdi, Address(rax_argslot, 0));
968 __ movptr(Address(rdx_newarg, 0), rdi);
969 __ addptr(rax_argslot, wordSize);
970 __ addptr(rdx_newarg, wordSize);
971 __ cmpptr(rdx_newarg, rbx_oldarg);
972 __ jcc(Assembler::less, loop);
973
974 __ pop(rdi); // restore temp
975
976 __ movptr(rcx_recv, rcx_mh_vmtarget);
977 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
978 }
979 break;
980
981 case _adapter_drop_args:
982 {
983 // 'argslot' is the position of the first argument to nuke
984 __ movl(rax_argslot, rcx_amh_vmargslot);
985 __ lea(rax_argslot, __ argument_address(rax_argslot));
986
987 __ push(rdi); // need a temp
988 // (must do previous push after argslot address is taken)
989
990 // 'stack_move' is number of words to drop
991 Register rdi_stack_move = rdi;
992 __ movl(rdi_stack_move, rcx_amh_conversion);
993 __ sarl(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
994 remove_arg_slots(_masm, rdi_stack_move,
995 rax_argslot, rbx_temp, rdx_temp);
996
997 __ pop(rdi); // restore temp
998
999 __ movptr(rcx_recv, rcx_mh_vmtarget);
1000 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1001 }
1002 break;
1003
1004 case _adapter_collect_args:
1005 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1006 break;
1007
1008 case _adapter_spread_args:
1009 // handled completely by optimized cases
1010 __ stop("init_AdapterMethodHandle should not issue this");
1011 break;
1012
1013 case _adapter_opt_spread_0:
1014 case _adapter_opt_spread_1:
1015 case _adapter_opt_spread_more:
1016 {
1017 // spread an array out into a group of arguments
1018 int length_constant = -1;
1019 switch (ek) {
1020 case _adapter_opt_spread_0: length_constant = 0; break;
1021 case _adapter_opt_spread_1: length_constant = 1; break;
1022 }
1023
1024 // find the address of the array argument
1025 __ movl(rax_argslot, rcx_amh_vmargslot);
1026 __ lea(rax_argslot, __ argument_address(rax_argslot));
1027
1028 // grab some temps
1029 { __ push(rsi); __ push(rdi); }
1030 // (preceding pushes must be done after argslot address is taken!)
1031 #define UNPUSH_RSI_RDI \
1032 { __ pop(rdi); __ pop(rsi); }
1033
1034 // arx_argslot points both to the array and to the first output arg
1035 vmarg = Address(rax_argslot, 0);
1036
1037 // Get the array value.
1038 Register rsi_array = rsi;
1039 Register rdx_array_klass = rdx_temp;
1040 BasicType elem_type = T_OBJECT;
1041 int length_offset = arrayOopDesc::length_offset_in_bytes();
1042 int elem0_offset = arrayOopDesc::base_offset_in_bytes(elem_type);
1043 __ movptr(rsi_array, vmarg);
1044 Label skip_array_check;
1045 if (length_constant == 0) {
1046 __ testptr(rsi_array, rsi_array);
1047 __ jcc(Assembler::zero, skip_array_check);
1048 }
1049 __ null_check(rsi_array, oopDesc::klass_offset_in_bytes());
1050 __ load_klass(rdx_array_klass, rsi_array);
1051
1052 // Check the array type.
1053 Register rbx_klass = rbx_temp;
1054 __ movptr(rbx_klass, rcx_amh_argument); // this is a Class object!
1055 __ movptr(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
1056
1057 Label ok_array_klass, bad_array_klass, bad_array_length;
1058 __ check_klass_subtype(rdx_array_klass, rbx_klass, rdi, ok_array_klass);
1059 // If we get here, the type check failed!
1060 __ jmp(bad_array_klass);
1061 __ bind(ok_array_klass);
1062
1063 // Check length.
1064 if (length_constant >= 0) {
1065 __ cmpl(Address(rsi_array, length_offset), length_constant);
1066 } else {
1067 Register rbx_vminfo = rbx_temp;
1068 __ movl(rbx_vminfo, rcx_amh_conversion);
1069 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
1070 __ andl(rbx_vminfo, CONV_VMINFO_MASK);
1071 __ cmpl(rbx_vminfo, Address(rsi_array, length_offset));
1072 }
1073 __ jcc(Assembler::notEqual, bad_array_length);
1074
1075 Register rdx_argslot_limit = rdx_temp;
1076
1077 // Array length checks out. Now insert any required stack slots.
1078 if (length_constant == -1) {
1079 // Form a pointer to the end of the affected region.
1080 __ lea(rdx_argslot_limit, Address(rax_argslot, Interpreter::stackElementSize()));
1081 // 'stack_move' is negative number of words to insert
1082 Register rdi_stack_move = rdi;
1083 __ movl(rdi_stack_move, rcx_amh_conversion);
1084 __ sarl(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1085 Register rsi_temp = rsi_array; // spill this
1086 insert_arg_slots(_masm, rdi_stack_move, -1,
1087 rax_argslot, rbx_temp, rsi_temp);
1088 // reload the array (since rsi was killed)
1089 __ movptr(rsi_array, vmarg);
1090 } else if (length_constant > 1) {
1091 int arg_mask = 0;
1092 int new_slots = (length_constant - 1);
1093 for (int i = 0; i < new_slots; i++) {
1094 arg_mask <<= 1;
1095 arg_mask |= _INSERT_REF_MASK;
1096 }
1097 insert_arg_slots(_masm, new_slots * stack_move_unit(), arg_mask,
1098 rax_argslot, rbx_temp, rdx_temp);
1099 } else if (length_constant == 1) {
1100 // no stack resizing required
1101 } else if (length_constant == 0) {
1102 remove_arg_slots(_masm, -stack_move_unit(),
1103 rax_argslot, rbx_temp, rdx_temp);
1104 }
1105
1106 // Copy from the array to the new slots.
1107 // Note: Stack change code preserves integrity of rax_argslot pointer.
1108 // So even after slot insertions, rax_argslot still points to first argument.
1109 if (length_constant == -1) {
1110 // [rax_argslot, rdx_argslot_limit) is the area we are inserting into.
1111 Register rsi_source = rsi_array;
1112 __ lea(rsi_source, Address(rsi_array, elem0_offset));
1113 Label loop;
1114 __ bind(loop);
1115 __ movptr(rbx_temp, Address(rsi_source, 0));
1116 __ movptr(Address(rax_argslot, 0), rbx_temp);
1117 __ addptr(rsi_source, type2aelembytes(elem_type));
1118 if (TaggedStackInterpreter) {
1119 __ movptr(Address(rax_argslot, tag_offset),
1120 frame::tag_for_basic_type(elem_type));
1121 }
1122 __ addptr(rax_argslot, Interpreter::stackElementSize());
1123 __ cmpptr(rax_argslot, rdx_argslot_limit);
1124 __ jcc(Assembler::less, loop);
1125 } else if (length_constant == 0) {
1126 __ bind(skip_array_check);
1127 // nothing to copy
1128 } else {
1129 int elem_offset = elem0_offset;
1130 int slot_offset = 0;
1131 for (int index = 0; index < length_constant; index++) {
1132 __ movptr(rbx_temp, Address(rsi_array, elem_offset));
1133 __ movptr(Address(rax_argslot, slot_offset), rbx_temp);
1134 elem_offset += type2aelembytes(elem_type);
1135 if (TaggedStackInterpreter) {
1136 __ movptr(Address(rax_argslot, slot_offset + tag_offset),
1137 frame::tag_for_basic_type(elem_type));
1138 }
1139 slot_offset += Interpreter::stackElementSize();
1140 }
1141 }
1142
1143 // Arguments are spread. Move to next method handle.
1144 UNPUSH_RSI_RDI;
1145 __ movptr(rcx_recv, rcx_mh_vmtarget);
1146 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1147
1148 __ bind(bad_array_klass);
1149 UNPUSH_RSI_RDI;
1150 __ pushptr(Address(rdx_array_klass, java_mirror_offset)); // required type
1151 __ pushptr(vmarg); // bad array
1152 __ push((int)Bytecodes::_aaload); // who is complaining?
1153 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1154
1155 __ bind(bad_array_length);
1156 UNPUSH_RSI_RDI;
1157 __ push(rcx_recv); // AMH requiring a certain length
1158 __ pushptr(vmarg); // bad array
1159 __ push((int)Bytecodes::_arraylength); // who is complaining?
1160 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1161
1162 #undef UNPUSH_RSI_RDI
1163 }
1164 break;
1165
1166 case _adapter_flyby:
1167 case _adapter_ricochet:
1168 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1169 break;
1170
1171 default: ShouldNotReachHere();
1172 }
1173 __ hlt();
1174
1175 address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
1176 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1177
1178 init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
1179 }