1 /*
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_methodHandles_x86.cpp.incl"
27
28 #define __ _masm->
29
30 #ifdef PRODUCT
31 #define BLOCK_COMMENT(str) /* nothing */
32 #else
33 #define BLOCK_COMMENT(str) __ block_comment(str)
34 #endif
35
36 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
37
38 address MethodHandleEntry::start_compiled_entry(MacroAssembler* _masm,
39 address interpreted_entry) {
40 // Just before the actual machine code entry point, allocate space
41 // for a MethodHandleEntry::Data record, so that we can manage everything
42 // from one base pointer.
43 __ align(wordSize);
44 address target = __ pc() + sizeof(Data);
45 while (__ pc() < target) {
46 __ nop();
47 __ align(wordSize);
48 }
49
50 MethodHandleEntry* me = (MethodHandleEntry*) __ pc();
51 me->set_end_address(__ pc()); // set a temporary end_address
52 me->set_from_interpreted_entry(interpreted_entry);
53 me->set_type_checking_entry(NULL);
54
55 return (address) me;
56 }
57
58 MethodHandleEntry* MethodHandleEntry::finish_compiled_entry(MacroAssembler* _masm,
59 address start_addr) {
60 MethodHandleEntry* me = (MethodHandleEntry*) start_addr;
61 assert(me->end_address() == start_addr, "valid ME");
62
63 // Fill in the real end_address:
64 __ align(wordSize);
65 me->set_end_address(__ pc());
66
67 return me;
68 }
69
70 #ifdef ASSERT
71 static void verify_argslot(MacroAssembler* _masm, Register argslot_reg,
72 const char* error_message) {
73 // Verify that argslot lies within (rsp, rbp].
74 Label L_ok, L_bad;
75 BLOCK_COMMENT("{ verify_argslot");
76 __ cmpptr(argslot_reg, rbp);
77 __ jccb(Assembler::above, L_bad);
78 __ cmpptr(rsp, argslot_reg);
79 __ jccb(Assembler::below, L_ok);
80 __ bind(L_bad);
81 __ stop(error_message);
82 __ bind(L_ok);
83 BLOCK_COMMENT("} verify_argslot");
84 }
85 #endif
86
87
88 // Code generation
89 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) {
90 // rbx: methodOop
91 // rcx: receiver method handle (must load from sp[MethodTypeForm.vmslots])
92 // rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
93 // rdx, rdi: garbage temp, blown away
94
95 Register rbx_method = rbx;
96 Register rcx_recv = rcx;
97 Register rax_mtype = rax;
98 Register rdx_temp = rdx;
99 Register rdi_temp = rdi;
100
101 // emit WrongMethodType path first, to enable jccb back-branch from main path
102 Label wrong_method_type;
103 __ bind(wrong_method_type);
104 Label invoke_generic_slow_path;
105 assert(methodOopDesc::intrinsic_id_size_in_bytes() == sizeof(u1), "");;
106 __ cmpb(Address(rbx_method, methodOopDesc::intrinsic_id_offset_in_bytes()), (int) vmIntrinsics::_invokeExact);
107 __ jcc(Assembler::notEqual, invoke_generic_slow_path);
108 __ push(rax_mtype); // required mtype
109 __ push(rcx_recv); // bad mh (1st stacked argument)
110 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
111
112 // here's where control starts out:
113 __ align(CodeEntryAlignment);
114 address entry_point = __ pc();
115
116 // fetch the MethodType from the method handle into rax (the 'check' register)
117 {
118 Register tem = rbx_method;
119 for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) {
120 __ movptr(rax_mtype, Address(tem, *pchase));
121 tem = rax_mtype; // in case there is another indirection
122 }
123 }
124
125 // given the MethodType, find out where the MH argument is buried
126 __ movptr(rdx_temp, Address(rax_mtype,
127 __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, rdi_temp)));
128 Register rdx_vmslots = rdx_temp;
129 __ movl(rdx_vmslots, Address(rdx_temp,
130 __ delayed_value(java_dyn_MethodTypeForm::vmslots_offset_in_bytes, rdi_temp)));
131 __ movptr(rcx_recv, __ argument_address(rdx_vmslots));
132
133 trace_method_handle(_masm, "invokeExact");
134
135 __ check_method_handle_type(rax_mtype, rcx_recv, rdi_temp, wrong_method_type);
136 __ jump_to_method_handle_entry(rcx_recv, rdi_temp);
137
138 // for invokeGeneric (only), apply argument and result conversions on the fly
139 __ bind(invoke_generic_slow_path);
140 #ifdef ASSERT
141 { Label L;
142 __ cmpb(Address(rbx_method, methodOopDesc::intrinsic_id_offset_in_bytes()), (int) vmIntrinsics::_invokeGeneric);
143 __ jcc(Assembler::equal, L);
144 __ stop("bad methodOop::intrinsic_id");
145 __ bind(L);
146 }
147 #endif //ASSERT
148 Register rbx_temp = rbx_method; // don't need it now
149
150 // make room on the stack for another pointer:
151 Register rcx_argslot = rcx_recv;
152 __ lea(rcx_argslot, __ argument_address(rdx_vmslots, 1));
153 insert_arg_slots(_masm, 2 * stack_move_unit(), _INSERT_REF_MASK,
154 rcx_argslot, rbx_temp, rdx_temp);
155
156 // load up an adapter from the calling type (Java weaves this)
157 __ movptr(rdx_temp, Address(rax_mtype,
158 __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, rdi_temp)));
159 Register rdx_adapter = rdx_temp;
160 // movptr(rdx_adapter, Address(rdx_temp, java_dyn_MethodTypeForm::genericInvoker_offset_in_bytes()));
161 // deal with old JDK versions:
162 __ lea(rdi_temp, Address(rdx_temp,
163 __ delayed_value(java_dyn_MethodTypeForm::genericInvoker_offset_in_bytes, rdi_temp)));
164 __ cmpptr(rdi_temp, rdx_temp);
165 Label sorry_no_invoke_generic;
166 __ jccb(Assembler::below, sorry_no_invoke_generic);
167
168 __ movptr(rdx_adapter, Address(rdi_temp, 0));
169 __ testptr(rdx_adapter, rdx_adapter);
170 __ jccb(Assembler::zero, sorry_no_invoke_generic);
171 __ movptr(Address(rcx_argslot, 1 * Interpreter::stackElementSize), rdx_adapter);
172 // As a trusted first argument, pass the type being called, so the adapter knows
173 // the actual types of the arguments and return values.
174 // (Generic invokers are shared among form-families of method-type.)
175 __ movptr(Address(rcx_argslot, 0 * Interpreter::stackElementSize), rax_mtype);
176 // FIXME: assert that rdx_adapter is of the right method-type.
177 __ mov(rcx, rdx_adapter);
178 trace_method_handle(_masm, "invokeGeneric");
179 __ jump_to_method_handle_entry(rcx, rdi_temp);
180
181 __ bind(sorry_no_invoke_generic); // no invokeGeneric implementation available!
182 __ movptr(rcx_recv, Address(rcx_argslot, -1 * Interpreter::stackElementSize)); // recover original MH
183 __ push(rax_mtype); // required mtype
184 __ push(rcx_recv); // bad mh (1st stacked argument)
185 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
186
187 return entry_point;
188 }
189
190 // Helper to insert argument slots into the stack.
191 // arg_slots must be a multiple of stack_move_unit() and <= 0
192 void MethodHandles::insert_arg_slots(MacroAssembler* _masm,
193 RegisterOrConstant arg_slots,
194 int arg_mask,
195 Register rax_argslot,
196 Register rbx_temp, Register rdx_temp, Register temp3_reg) {
197 assert(temp3_reg == noreg, "temp3 not required");
198 assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
199 (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
200
201 #ifdef ASSERT
202 verify_argslot(_masm, rax_argslot, "insertion point must fall within current frame");
203 if (arg_slots.is_register()) {
204 Label L_ok, L_bad;
205 __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
206 __ jccb(Assembler::greater, L_bad);
207 __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
208 __ jccb(Assembler::zero, L_ok);
209 __ bind(L_bad);
210 __ stop("assert arg_slots <= 0 and clear low bits");
211 __ bind(L_ok);
212 } else {
213 assert(arg_slots.as_constant() <= 0, "");
214 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
215 }
216 #endif //ASSERT
217
218 #ifdef _LP64
219 if (arg_slots.is_register()) {
220 // clean high bits of stack motion register (was loaded as an int)
221 __ movslq(arg_slots.as_register(), arg_slots.as_register());
222 }
223 #endif
224
225 // Make space on the stack for the inserted argument(s).
226 // Then pull down everything shallower than rax_argslot.
227 // The stacked return address gets pulled down with everything else.
228 // That is, copy [rsp, argslot) downward by -size words. In pseudo-code:
229 // rsp -= size;
230 // for (rdx = rsp + size; rdx < argslot; rdx++)
231 // rdx[-size] = rdx[0]
232 // argslot -= size;
233 BLOCK_COMMENT("insert_arg_slots {");
234 __ mov(rdx_temp, rsp); // source pointer for copy
235 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
236 {
237 Label loop;
238 __ BIND(loop);
239 // pull one word down each time through the loop
240 __ movptr(rbx_temp, Address(rdx_temp, 0));
241 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
242 __ addptr(rdx_temp, wordSize);
243 __ cmpptr(rdx_temp, rax_argslot);
244 __ jccb(Assembler::less, loop);
245 }
246
247 // Now move the argslot down, to point to the opened-up space.
248 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
249 BLOCK_COMMENT("} insert_arg_slots");
250 }
251
252 // Helper to remove argument slots from the stack.
253 // arg_slots must be a multiple of stack_move_unit() and >= 0
254 void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
255 RegisterOrConstant arg_slots,
256 Register rax_argslot,
257 Register rbx_temp, Register rdx_temp, Register temp3_reg) {
258 assert(temp3_reg == noreg, "temp3 not required");
259 assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
260 (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
261
262 #ifdef ASSERT
263 // Verify that [argslot..argslot+size) lies within (rsp, rbp).
264 __ lea(rbx_temp, Address(rax_argslot, arg_slots, Address::times_ptr));
265 verify_argslot(_masm, rbx_temp, "deleted argument(s) must fall within current frame");
266 if (arg_slots.is_register()) {
267 Label L_ok, L_bad;
268 __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
269 __ jccb(Assembler::less, L_bad);
270 __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
271 __ jccb(Assembler::zero, L_ok);
272 __ bind(L_bad);
273 __ stop("assert arg_slots >= 0 and clear low bits");
274 __ bind(L_ok);
275 } else {
276 assert(arg_slots.as_constant() >= 0, "");
277 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
278 }
279 #endif //ASSERT
280
281 #ifdef _LP64
282 if (false) { // not needed, since register is positive
283 // clean high bits of stack motion register (was loaded as an int)
284 if (arg_slots.is_register())
285 __ movslq(arg_slots.as_register(), arg_slots.as_register());
286 }
287 #endif
288
289 BLOCK_COMMENT("remove_arg_slots {");
290 // Pull up everything shallower than rax_argslot.
291 // Then remove the excess space on the stack.
292 // The stacked return address gets pulled up with everything else.
293 // That is, copy [rsp, argslot) upward by size words. In pseudo-code:
294 // for (rdx = argslot-1; rdx >= rsp; --rdx)
295 // rdx[size] = rdx[0]
296 // argslot += size;
297 // rsp += size;
298 __ lea(rdx_temp, Address(rax_argslot, -wordSize)); // source pointer for copy
299 {
300 Label loop;
301 __ BIND(loop);
302 // pull one word up each time through the loop
303 __ movptr(rbx_temp, Address(rdx_temp, 0));
304 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
305 __ addptr(rdx_temp, -wordSize);
306 __ cmpptr(rdx_temp, rsp);
307 __ jccb(Assembler::greaterEqual, loop);
308 }
309
310 // Now move the argslot up, to point to the just-copied block.
311 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
312 // And adjust the argslot address to point at the deletion point.
313 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
314 BLOCK_COMMENT("} remove_arg_slots");
315 }
316
317 #ifndef PRODUCT
318 extern "C" void print_method_handle(oop mh);
319 void trace_method_handle_stub(const char* adaptername,
320 oop mh,
321 intptr_t* saved_regs,
322 intptr_t* entry_sp,
323 intptr_t* saved_sp,
324 intptr_t* saved_bp) {
325 // called as a leaf from native code: do not block the JVM!
326 intptr_t* last_sp = (intptr_t*) saved_bp[frame::interpreter_frame_last_sp_offset];
327 intptr_t* base_sp = (intptr_t*) saved_bp[frame::interpreter_frame_monitor_block_top_offset];
328 printf("MH %s mh="INTPTR_FORMAT" sp=("INTPTR_FORMAT"+"INTX_FORMAT") stack_size="INTX_FORMAT" bp="INTPTR_FORMAT"\n",
329 adaptername, (intptr_t)mh, (intptr_t)entry_sp, (intptr_t)(saved_sp - entry_sp), (intptr_t)(base_sp - last_sp), (intptr_t)saved_bp);
330 if (last_sp != saved_sp && last_sp != NULL)
331 printf("*** last_sp="INTPTR_FORMAT"\n", (intptr_t)last_sp);
332 if (Verbose) {
333 printf(" reg dump: ");
334 int saved_regs_count = (entry_sp-1) - saved_regs;
335 // 32 bit: rdi rsi rbp rsp; rbx rdx rcx (*) rax
336 int i;
337 for (i = 0; i <= saved_regs_count; i++) {
338 if (i > 0 && i % 4 == 0 && i != saved_regs_count)
339 printf("\n + dump: ");
340 printf(" %d: "INTPTR_FORMAT, i, saved_regs[i]);
341 }
342 printf("\n");
343 int stack_dump_count = 16;
344 if (stack_dump_count < (int)(saved_bp + 2 - saved_sp))
345 stack_dump_count = (int)(saved_bp + 2 - saved_sp);
346 if (stack_dump_count > 64) stack_dump_count = 48;
347 for (i = 0; i < stack_dump_count; i += 4) {
348 printf(" dump at SP[%d] "INTPTR_FORMAT": "INTPTR_FORMAT" "INTPTR_FORMAT" "INTPTR_FORMAT" "INTPTR_FORMAT"\n",
349 i, (intptr_t)&entry_sp[i+0], entry_sp[i+0], entry_sp[i+1], entry_sp[i+2], entry_sp[i+3]);
350 }
351 print_method_handle(mh);
352 }
353 }
354 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) {
355 if (!TraceMethodHandles) return;
356 BLOCK_COMMENT("trace_method_handle {");
357 __ push(rax);
358 __ lea(rax, Address(rsp, wordSize*6)); // entry_sp
359 __ pusha();
360 // arguments:
361 __ push(rbp); // interpreter frame pointer
362 __ push(rsi); // saved_sp
363 __ push(rax); // entry_sp
364 __ push(rcx); // mh
365 __ push(rcx);
366 __ movptr(Address(rsp, 0), (intptr_t) adaptername);
367 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub), 5);
368 __ popa();
369 __ pop(rax);
370 BLOCK_COMMENT("} trace_method_handle");
371 }
372 #endif //PRODUCT
373
374 // which conversion op types are implemented here?
375 int MethodHandles::adapter_conversion_ops_supported_mask() {
376 return ((1<<sun_dyn_AdapterMethodHandle::OP_RETYPE_ONLY)
377 |(1<<sun_dyn_AdapterMethodHandle::OP_RETYPE_RAW)
378 |(1<<sun_dyn_AdapterMethodHandle::OP_CHECK_CAST)
379 |(1<<sun_dyn_AdapterMethodHandle::OP_PRIM_TO_PRIM)
380 |(1<<sun_dyn_AdapterMethodHandle::OP_REF_TO_PRIM)
381 |(1<<sun_dyn_AdapterMethodHandle::OP_SWAP_ARGS)
382 |(1<<sun_dyn_AdapterMethodHandle::OP_ROT_ARGS)
383 |(1<<sun_dyn_AdapterMethodHandle::OP_DUP_ARGS)
384 |(1<<sun_dyn_AdapterMethodHandle::OP_DROP_ARGS)
385 //|(1<<sun_dyn_AdapterMethodHandle::OP_SPREAD_ARGS) //BUG!
386 );
387 // FIXME: MethodHandlesTest gets a crash if we enable OP_SPREAD_ARGS.
388 }
389
390 // Generate an "entry" field for a method handle.
391 // This determines how the method handle will respond to calls.
392 void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
393 // Here is the register state during an interpreted call,
394 // as set up by generate_method_handle_interpreter_entry():
395 // - rbx: garbage temp (was MethodHandle.invoke methodOop, unused)
396 // - rcx: receiver method handle
397 // - rax: method handle type (only used by the check_mtype entry point)
398 // - rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
399 // - rdx: garbage temp, can blow away
400
401 Register rcx_recv = rcx;
402 Register rax_argslot = rax;
403 Register rbx_temp = rbx;
404 Register rdx_temp = rdx;
405
406 // This guy is set up by prepare_to_jump_from_interpreted (from interpreted calls)
407 // and gen_c2i_adapter (from compiled calls):
408 Register saved_last_sp = LP64_ONLY(r13) NOT_LP64(rsi);
409
410 guarantee(java_dyn_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
411
412 // some handy addresses
413 Address rbx_method_fie( rbx, methodOopDesc::from_interpreted_offset() );
414
415 Address rcx_mh_vmtarget( rcx_recv, java_dyn_MethodHandle::vmtarget_offset_in_bytes() );
416 Address rcx_dmh_vmindex( rcx_recv, sun_dyn_DirectMethodHandle::vmindex_offset_in_bytes() );
417
418 Address rcx_bmh_vmargslot( rcx_recv, sun_dyn_BoundMethodHandle::vmargslot_offset_in_bytes() );
419 Address rcx_bmh_argument( rcx_recv, sun_dyn_BoundMethodHandle::argument_offset_in_bytes() );
420
421 Address rcx_amh_vmargslot( rcx_recv, sun_dyn_AdapterMethodHandle::vmargslot_offset_in_bytes() );
422 Address rcx_amh_argument( rcx_recv, sun_dyn_AdapterMethodHandle::argument_offset_in_bytes() );
423 Address rcx_amh_conversion( rcx_recv, sun_dyn_AdapterMethodHandle::conversion_offset_in_bytes() );
424 Address vmarg; // __ argument_address(vmargslot)
425
426 const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
427
428 if (have_entry(ek)) {
429 __ nop(); // empty stubs make SG sick
430 return;
431 }
432
433 address interp_entry = __ pc();
434 if (UseCompressedOops) __ unimplemented("UseCompressedOops");
435
436 trace_method_handle(_masm, entry_name(ek));
437
438 BLOCK_COMMENT(entry_name(ek));
439
440 switch ((int) ek) {
441 case _raise_exception:
442 {
443 // Not a real MH entry, but rather shared code for raising an exception.
444 // Extra local arguments are pushed on stack, as required type at TOS+8,
445 // failing object (or NULL) at TOS+4, failing bytecode type at TOS.
446 // Beyond those local arguments are the PC, of course.
447 Register rdx_code = rdx_temp;
448 Register rcx_fail = rcx_recv;
449 Register rax_want = rax_argslot;
450 Register rdi_pc = rdi;
451 __ pop(rdx_code); // TOS+0
452 __ pop(rcx_fail); // TOS+4
453 __ pop(rax_want); // TOS+8
454 __ pop(rdi_pc); // caller PC
455
456 __ mov(rsp, rsi); // cut the stack back to where the caller started
457
458 // Repush the arguments as if coming from the interpreter.
459 __ push(rdx_code);
460 __ push(rcx_fail);
461 __ push(rax_want);
462
463 Register rbx_method = rbx_temp;
464 Label no_method;
465 // FIXME: fill in _raise_exception_method with a suitable sun.dyn method
466 __ movptr(rbx_method, ExternalAddress((address) &_raise_exception_method));
467 __ testptr(rbx_method, rbx_method);
468 __ jccb(Assembler::zero, no_method);
469 int jobject_oop_offset = 0;
470 __ movptr(rbx_method, Address(rbx_method, jobject_oop_offset)); // dereference the jobject
471 __ testptr(rbx_method, rbx_method);
472 __ jccb(Assembler::zero, no_method);
473 __ verify_oop(rbx_method);
474 __ push(rdi_pc); // and restore caller PC
475 __ jmp(rbx_method_fie);
476
477 // If we get here, the Java runtime did not do its job of creating the exception.
478 // Do something that is at least causes a valid throw from the interpreter.
479 __ bind(no_method);
480 __ pop(rax_want);
481 __ pop(rcx_fail);
482 __ push(rax_want);
483 __ push(rcx_fail);
484 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
485 }
486 break;
487
488 case _invokestatic_mh:
489 case _invokespecial_mh:
490 {
491 Register rbx_method = rbx_temp;
492 __ movptr(rbx_method, rcx_mh_vmtarget); // target is a methodOop
493 __ verify_oop(rbx_method);
494 // same as TemplateTable::invokestatic or invokespecial,
495 // minus the CP setup and profiling:
496 if (ek == _invokespecial_mh) {
497 // Must load & check the first argument before entering the target method.
498 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
499 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
500 __ null_check(rcx_recv);
501 __ verify_oop(rcx_recv);
502 }
503 __ jmp(rbx_method_fie);
504 }
505 break;
506
507 case _invokevirtual_mh:
508 {
509 // same as TemplateTable::invokevirtual,
510 // minus the CP setup and profiling:
511
512 // pick out the vtable index and receiver offset from the MH,
513 // and then we can discard it:
514 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
515 Register rbx_index = rbx_temp;
516 __ movl(rbx_index, rcx_dmh_vmindex);
517 // Note: The verifier allows us to ignore rcx_mh_vmtarget.
518 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
519 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
520
521 // get receiver klass
522 Register rax_klass = rax_argslot;
523 __ load_klass(rax_klass, rcx_recv);
524 __ verify_oop(rax_klass);
525
526 // get target methodOop & entry point
527 const int base = instanceKlass::vtable_start_offset() * wordSize;
528 assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
529 Address vtable_entry_addr(rax_klass,
530 rbx_index, Address::times_ptr,
531 base + vtableEntry::method_offset_in_bytes());
532 Register rbx_method = rbx_temp;
533 __ movptr(rbx_method, vtable_entry_addr);
534
535 __ verify_oop(rbx_method);
536 __ jmp(rbx_method_fie);
537 }
538 break;
539
540 case _invokeinterface_mh:
541 {
542 // same as TemplateTable::invokeinterface,
543 // minus the CP setup and profiling:
544
545 // pick out the interface and itable index from the MH.
546 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
547 Register rdx_intf = rdx_temp;
548 Register rbx_index = rbx_temp;
549 __ movptr(rdx_intf, rcx_mh_vmtarget);
550 __ movl(rbx_index, rcx_dmh_vmindex);
551 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
552 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
553
554 // get receiver klass
555 Register rax_klass = rax_argslot;
556 __ load_klass(rax_klass, rcx_recv);
557 __ verify_oop(rax_klass);
558
559 Register rdi_temp = rdi;
560 Register rbx_method = rbx_index;
561
562 // get interface klass
563 Label no_such_interface;
564 __ verify_oop(rdx_intf);
565 __ lookup_interface_method(rax_klass, rdx_intf,
566 // note: next two args must be the same:
567 rbx_index, rbx_method,
568 rdi_temp,
569 no_such_interface);
570
571 __ verify_oop(rbx_method);
572 __ jmp(rbx_method_fie);
573 __ hlt();
574
575 __ bind(no_such_interface);
576 // Throw an exception.
577 // For historical reasons, it will be IncompatibleClassChangeError.
578 __ pushptr(Address(rdx_intf, java_mirror_offset)); // required interface
579 __ push(rcx_recv); // bad receiver
580 __ push((int)Bytecodes::_invokeinterface); // who is complaining?
581 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
582 }
583 break;
584
585 case _bound_ref_mh:
586 case _bound_int_mh:
587 case _bound_long_mh:
588 case _bound_ref_direct_mh:
589 case _bound_int_direct_mh:
590 case _bound_long_direct_mh:
591 {
592 bool direct_to_method = (ek >= _bound_ref_direct_mh);
593 BasicType arg_type = T_ILLEGAL;
594 int arg_mask = _INSERT_NO_MASK;
595 int arg_slots = -1;
596 get_ek_bound_mh_info(ek, arg_type, arg_mask, arg_slots);
597
598 // make room for the new argument:
599 __ movl(rax_argslot, rcx_bmh_vmargslot);
600 __ lea(rax_argslot, __ argument_address(rax_argslot));
601 insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask,
602 rax_argslot, rbx_temp, rdx_temp);
603
604 // store bound argument into the new stack slot:
605 __ movptr(rbx_temp, rcx_bmh_argument);
606 Address prim_value_addr(rbx_temp, java_lang_boxing_object::value_offset_in_bytes(arg_type));
607 if (arg_type == T_OBJECT) {
608 __ movptr(Address(rax_argslot, 0), rbx_temp);
609 } else {
610 __ load_sized_value(rdx_temp, prim_value_addr,
611 type2aelembytes(arg_type), is_signed_subword_type(arg_type));
612 __ movptr(Address(rax_argslot, 0), rdx_temp);
613 #ifndef _LP64
614 if (arg_slots == 2) {
615 __ movl(rdx_temp, prim_value_addr.plus_disp(wordSize));
616 __ movl(Address(rax_argslot, Interpreter::stackElementSize), rdx_temp);
617 }
618 #endif //_LP64
619 }
620
621 if (direct_to_method) {
622 Register rbx_method = rbx_temp;
623 __ movptr(rbx_method, rcx_mh_vmtarget);
624 __ verify_oop(rbx_method);
625 __ jmp(rbx_method_fie);
626 } else {
627 __ movptr(rcx_recv, rcx_mh_vmtarget);
628 __ verify_oop(rcx_recv);
629 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
630 }
631 }
632 break;
633
634 case _adapter_retype_only:
635 case _adapter_retype_raw:
636 // immediately jump to the next MH layer:
637 __ movptr(rcx_recv, rcx_mh_vmtarget);
638 __ verify_oop(rcx_recv);
639 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
640 // This is OK when all parameter types widen.
641 // It is also OK when a return type narrows.
642 break;
643
644 case _adapter_check_cast:
645 {
646 // temps:
647 Register rbx_klass = rbx_temp; // interesting AMH data
648
649 // check a reference argument before jumping to the next layer of MH:
650 __ movl(rax_argslot, rcx_amh_vmargslot);
651 vmarg = __ argument_address(rax_argslot);
652
653 // What class are we casting to?
654 __ movptr(rbx_klass, rcx_amh_argument); // this is a Class object!
655 __ movptr(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
656
657 Label done;
658 __ movptr(rdx_temp, vmarg);
659 __ testptr(rdx_temp, rdx_temp);
660 __ jccb(Assembler::zero, done); // no cast if null
661 __ load_klass(rdx_temp, rdx_temp);
662
663 // live at this point:
664 // - rbx_klass: klass required by the target method
665 // - rdx_temp: argument klass to test
666 // - rcx_recv: adapter method handle
667 __ check_klass_subtype(rdx_temp, rbx_klass, rax_argslot, done);
668
669 // If we get here, the type check failed!
670 // Call the wrong_method_type stub, passing the failing argument type in rax.
671 Register rax_mtype = rax_argslot;
672 __ movl(rax_argslot, rcx_amh_vmargslot); // reload argslot field
673 __ movptr(rdx_temp, vmarg);
674
675 __ pushptr(rcx_amh_argument); // required class
676 __ push(rdx_temp); // bad object
677 __ push((int)Bytecodes::_checkcast); // who is complaining?
678 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
679
680 __ bind(done);
681 // get the new MH:
682 __ movptr(rcx_recv, rcx_mh_vmtarget);
683 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
684 }
685 break;
686
687 case _adapter_prim_to_prim:
688 case _adapter_ref_to_prim:
689 // handled completely by optimized cases
690 __ stop("init_AdapterMethodHandle should not issue this");
691 break;
692
693 case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
694 //case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
695 case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
696 case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
697 {
698 // perform an in-place conversion to int or an int subword
699 __ movl(rax_argslot, rcx_amh_vmargslot);
700 vmarg = __ argument_address(rax_argslot);
701
702 switch (ek) {
703 case _adapter_opt_i2i:
704 __ movl(rdx_temp, vmarg);
705 break;
706 case _adapter_opt_l2i:
707 {
708 // just delete the extra slot; on a little-endian machine we keep the first
709 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
710 remove_arg_slots(_masm, -stack_move_unit(),
711 rax_argslot, rbx_temp, rdx_temp);
712 vmarg = Address(rax_argslot, -Interpreter::stackElementSize);
713 __ movl(rdx_temp, vmarg);
714 }
715 break;
716 case _adapter_opt_unboxi:
717 {
718 // Load the value up from the heap.
719 __ movptr(rdx_temp, vmarg);
720 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
721 #ifdef ASSERT
722 for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
723 if (is_subword_type(BasicType(bt)))
724 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
725 }
726 #endif
727 __ null_check(rdx_temp, value_offset);
728 __ movl(rdx_temp, Address(rdx_temp, value_offset));
729 // We load this as a word. Because we are little-endian,
730 // the low bits will be correct, but the high bits may need cleaning.
731 // The vminfo will guide us to clean those bits.
732 }
733 break;
734 default:
735 ShouldNotReachHere();
736 }
737
738 // Do the requested conversion and store the value.
739 Register rbx_vminfo = rbx_temp;
740 __ movl(rbx_vminfo, rcx_amh_conversion);
741 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
742
743 // get the new MH:
744 __ movptr(rcx_recv, rcx_mh_vmtarget);
745 // (now we are done with the old MH)
746
747 // original 32-bit vmdata word must be of this form:
748 // | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
749 __ xchgptr(rcx, rbx_vminfo); // free rcx for shifts
750 __ shll(rdx_temp /*, rcx*/);
751 Label zero_extend, done;
752 __ testl(rcx, CONV_VMINFO_SIGN_FLAG);
753 __ jccb(Assembler::zero, zero_extend);
754
755 // this path is taken for int->byte, int->short
756 __ sarl(rdx_temp /*, rcx*/);
757 __ jmpb(done);
758
759 __ bind(zero_extend);
760 // this is taken for int->char
761 __ shrl(rdx_temp /*, rcx*/);
762
763 __ bind(done);
764 __ movl(vmarg, rdx_temp); // Store the value.
765 __ xchgptr(rcx, rbx_vminfo); // restore rcx_recv
766
767 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
768 }
769 break;
770
771 case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
772 case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
773 {
774 // perform an in-place int-to-long or ref-to-long conversion
775 __ movl(rax_argslot, rcx_amh_vmargslot);
776
777 // on a little-endian machine we keep the first slot and add another after
778 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
779 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
780 rax_argslot, rbx_temp, rdx_temp);
781 Address vmarg1(rax_argslot, -Interpreter::stackElementSize);
782 Address vmarg2 = vmarg1.plus_disp(Interpreter::stackElementSize);
783
784 switch (ek) {
785 case _adapter_opt_i2l:
786 {
787 #ifdef _LP64
788 __ movslq(rdx_temp, vmarg1); // Load sign-extended
789 __ movq(vmarg1, rdx_temp); // Store into first slot
790 #else
791 __ movl(rdx_temp, vmarg1);
792 __ sarl(rdx_temp, BitsPerInt - 1); // __ extend_sign()
793 __ movl(vmarg2, rdx_temp); // store second word
794 #endif
795 }
796 break;
797 case _adapter_opt_unboxl:
798 {
799 // Load the value up from the heap.
800 __ movptr(rdx_temp, vmarg1);
801 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
802 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
803 __ null_check(rdx_temp, value_offset);
804 #ifdef _LP64
805 __ movq(rbx_temp, Address(rdx_temp, value_offset));
806 __ movq(vmarg1, rbx_temp);
807 #else
808 __ movl(rbx_temp, Address(rdx_temp, value_offset + 0*BytesPerInt));
809 __ movl(rdx_temp, Address(rdx_temp, value_offset + 1*BytesPerInt));
810 __ movl(vmarg1, rbx_temp);
811 __ movl(vmarg2, rdx_temp);
812 #endif
813 }
814 break;
815 default:
816 ShouldNotReachHere();
817 }
818
819 __ movptr(rcx_recv, rcx_mh_vmtarget);
820 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
821 }
822 break;
823
824 case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
825 case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
826 {
827 // perform an in-place floating primitive conversion
828 __ movl(rax_argslot, rcx_amh_vmargslot);
829 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
830 if (ek == _adapter_opt_f2d) {
831 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
832 rax_argslot, rbx_temp, rdx_temp);
833 }
834 Address vmarg(rax_argslot, -Interpreter::stackElementSize);
835
836 #ifdef _LP64
837 if (ek == _adapter_opt_f2d) {
838 __ movflt(xmm0, vmarg);
839 __ cvtss2sd(xmm0, xmm0);
840 __ movdbl(vmarg, xmm0);
841 } else {
842 __ movdbl(xmm0, vmarg);
843 __ cvtsd2ss(xmm0, xmm0);
844 __ movflt(vmarg, xmm0);
845 }
846 #else //_LP64
847 if (ek == _adapter_opt_f2d) {
848 __ fld_s(vmarg); // load float to ST0
849 __ fstp_s(vmarg); // store single
850 } else {
851 __ fld_d(vmarg); // load double to ST0
852 __ fstp_s(vmarg); // store single
853 }
854 #endif //_LP64
855
856 if (ek == _adapter_opt_d2f) {
857 remove_arg_slots(_masm, -stack_move_unit(),
858 rax_argslot, rbx_temp, rdx_temp);
859 }
860
861 __ movptr(rcx_recv, rcx_mh_vmtarget);
862 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
863 }
864 break;
865
866 case _adapter_prim_to_ref:
867 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
868 break;
869
870 case _adapter_swap_args:
871 case _adapter_rot_args:
872 // handled completely by optimized cases
873 __ stop("init_AdapterMethodHandle should not issue this");
874 break;
875
876 case _adapter_opt_swap_1:
877 case _adapter_opt_swap_2:
878 case _adapter_opt_rot_1_up:
879 case _adapter_opt_rot_1_down:
880 case _adapter_opt_rot_2_up:
881 case _adapter_opt_rot_2_down:
882 {
883 int swap_bytes = 0, rotate = 0;
884 get_ek_adapter_opt_swap_rot_info(ek, swap_bytes, rotate);
885
886 // 'argslot' is the position of the first argument to swap
887 __ movl(rax_argslot, rcx_amh_vmargslot);
888 __ lea(rax_argslot, __ argument_address(rax_argslot));
889
890 // 'vminfo' is the second
891 Register rbx_destslot = rbx_temp;
892 __ movl(rbx_destslot, rcx_amh_conversion);
893 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
894 __ andl(rbx_destslot, CONV_VMINFO_MASK);
895 __ lea(rbx_destslot, __ argument_address(rbx_destslot));
896 DEBUG_ONLY(verify_argslot(_masm, rbx_destslot, "swap point must fall within current frame"));
897
898 if (!rotate) {
899 for (int i = 0; i < swap_bytes; i += wordSize) {
900 __ movptr(rdx_temp, Address(rax_argslot , i));
901 __ push(rdx_temp);
902 __ movptr(rdx_temp, Address(rbx_destslot, i));
903 __ movptr(Address(rax_argslot, i), rdx_temp);
904 __ pop(rdx_temp);
905 __ movptr(Address(rbx_destslot, i), rdx_temp);
906 }
907 } else {
908 // push the first chunk, which is going to get overwritten
909 for (int i = swap_bytes; (i -= wordSize) >= 0; ) {
910 __ movptr(rdx_temp, Address(rax_argslot, i));
911 __ push(rdx_temp);
912 }
913
914 if (rotate > 0) {
915 // rotate upward
916 __ subptr(rax_argslot, swap_bytes);
917 #ifdef ASSERT
918 {
919 // Verify that argslot > destslot, by at least swap_bytes.
920 Label L_ok;
921 __ cmpptr(rax_argslot, rbx_destslot);
922 __ jccb(Assembler::aboveEqual, L_ok);
923 __ stop("source must be above destination (upward rotation)");
924 __ bind(L_ok);
925 }
926 #endif
927 // work argslot down to destslot, copying contiguous data upwards
928 // pseudo-code:
929 // rax = src_addr - swap_bytes
930 // rbx = dest_addr
931 // while (rax >= rbx) *(rax + swap_bytes) = *(rax + 0), rax--;
932 Label loop;
933 __ bind(loop);
934 __ movptr(rdx_temp, Address(rax_argslot, 0));
935 __ movptr(Address(rax_argslot, swap_bytes), rdx_temp);
936 __ addptr(rax_argslot, -wordSize);
937 __ cmpptr(rax_argslot, rbx_destslot);
938 __ jccb(Assembler::aboveEqual, loop);
939 } else {
940 __ addptr(rax_argslot, swap_bytes);
941 #ifdef ASSERT
942 {
943 // Verify that argslot < destslot, by at least swap_bytes.
944 Label L_ok;
945 __ cmpptr(rax_argslot, rbx_destslot);
946 __ jccb(Assembler::belowEqual, L_ok);
947 __ stop("source must be below destination (downward rotation)");
948 __ bind(L_ok);
949 }
950 #endif
951 // work argslot up to destslot, copying contiguous data downwards
952 // pseudo-code:
953 // rax = src_addr + swap_bytes
954 // rbx = dest_addr
955 // while (rax <= rbx) *(rax - swap_bytes) = *(rax + 0), rax++;
956 Label loop;
957 __ bind(loop);
958 __ movptr(rdx_temp, Address(rax_argslot, 0));
959 __ movptr(Address(rax_argslot, -swap_bytes), rdx_temp);
960 __ addptr(rax_argslot, wordSize);
961 __ cmpptr(rax_argslot, rbx_destslot);
962 __ jccb(Assembler::belowEqual, loop);
963 }
964
965 // pop the original first chunk into the destination slot, now free
966 for (int i = 0; i < swap_bytes; i += wordSize) {
967 __ pop(rdx_temp);
968 __ movptr(Address(rbx_destslot, i), rdx_temp);
969 }
970 }
971
972 __ movptr(rcx_recv, rcx_mh_vmtarget);
973 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
974 }
975 break;
976
977 case _adapter_dup_args:
978 {
979 // 'argslot' is the position of the first argument to duplicate
980 __ movl(rax_argslot, rcx_amh_vmargslot);
981 __ lea(rax_argslot, __ argument_address(rax_argslot));
982
983 // 'stack_move' is negative number of words to duplicate
984 Register rdx_stack_move = rdx_temp;
985 __ movl2ptr(rdx_stack_move, rcx_amh_conversion);
986 __ sarptr(rdx_stack_move, CONV_STACK_MOVE_SHIFT);
987
988 int argslot0_num = 0;
989 Address argslot0 = __ argument_address(RegisterOrConstant(argslot0_num));
990 assert(argslot0.base() == rsp, "");
991 int pre_arg_size = argslot0.disp();
992 assert(pre_arg_size % wordSize == 0, "");
993 assert(pre_arg_size > 0, "must include PC");
994
995 // remember the old rsp+1 (argslot[0])
996 Register rbx_oldarg = rbx_temp;
997 __ lea(rbx_oldarg, argslot0);
998
999 // move rsp down to make room for dups
1000 __ lea(rsp, Address(rsp, rdx_stack_move, Address::times_ptr));
1001
1002 // compute the new rsp+1 (argslot[0])
1003 Register rdx_newarg = rdx_temp;
1004 __ lea(rdx_newarg, argslot0);
1005
1006 __ push(rdi); // need a temp
1007 // (preceding push must be done after arg addresses are taken!)
1008
1009 // pull down the pre_arg_size data (PC)
1010 for (int i = -pre_arg_size; i < 0; i += wordSize) {
1011 __ movptr(rdi, Address(rbx_oldarg, i));
1012 __ movptr(Address(rdx_newarg, i), rdi);
1013 }
1014
1015 // copy from rax_argslot[0...] down to new_rsp[1...]
1016 // pseudo-code:
1017 // rbx = old_rsp+1
1018 // rdx = new_rsp+1
1019 // rax = argslot
1020 // while (rdx < rbx) *rdx++ = *rax++
1021 Label loop;
1022 __ bind(loop);
1023 __ movptr(rdi, Address(rax_argslot, 0));
1024 __ movptr(Address(rdx_newarg, 0), rdi);
1025 __ addptr(rax_argslot, wordSize);
1026 __ addptr(rdx_newarg, wordSize);
1027 __ cmpptr(rdx_newarg, rbx_oldarg);
1028 __ jccb(Assembler::less, loop);
1029
1030 __ pop(rdi); // restore temp
1031
1032 __ movptr(rcx_recv, rcx_mh_vmtarget);
1033 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1034 }
1035 break;
1036
1037 case _adapter_drop_args:
1038 {
1039 // 'argslot' is the position of the first argument to nuke
1040 __ movl(rax_argslot, rcx_amh_vmargslot);
1041 __ lea(rax_argslot, __ argument_address(rax_argslot));
1042
1043 __ push(rdi); // need a temp
1044 // (must do previous push after argslot address is taken)
1045
1046 // 'stack_move' is number of words to drop
1047 Register rdi_stack_move = rdi;
1048 __ movl2ptr(rdi_stack_move, rcx_amh_conversion);
1049 __ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1050 remove_arg_slots(_masm, rdi_stack_move,
1051 rax_argslot, rbx_temp, rdx_temp);
1052
1053 __ pop(rdi); // restore temp
1054
1055 __ movptr(rcx_recv, rcx_mh_vmtarget);
1056 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1057 }
1058 break;
1059
1060 case _adapter_collect_args:
1061 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1062 break;
1063
1064 case _adapter_spread_args:
1065 // handled completely by optimized cases
1066 __ stop("init_AdapterMethodHandle should not issue this");
1067 break;
1068
1069 case _adapter_opt_spread_0:
1070 case _adapter_opt_spread_1:
1071 case _adapter_opt_spread_more:
1072 {
1073 // spread an array out into a group of arguments
1074 int length_constant = get_ek_adapter_opt_spread_info(ek);
1075
1076 // find the address of the array argument
1077 __ movl(rax_argslot, rcx_amh_vmargslot);
1078 __ lea(rax_argslot, __ argument_address(rax_argslot));
1079
1080 // grab some temps
1081 { __ push(rsi); __ push(rdi); }
1082 // (preceding pushes must be done after argslot address is taken!)
1083 #define UNPUSH_RSI_RDI \
1084 { __ pop(rdi); __ pop(rsi); }
1085
1086 // arx_argslot points both to the array and to the first output arg
1087 vmarg = Address(rax_argslot, 0);
1088
1089 // Get the array value.
1090 Register rsi_array = rsi;
1091 Register rdx_array_klass = rdx_temp;
1092 BasicType elem_type = T_OBJECT;
1093 int length_offset = arrayOopDesc::length_offset_in_bytes();
1094 int elem0_offset = arrayOopDesc::base_offset_in_bytes(elem_type);
1095 __ movptr(rsi_array, vmarg);
1096 Label skip_array_check;
1097 if (length_constant == 0) {
1098 __ testptr(rsi_array, rsi_array);
1099 __ jcc(Assembler::zero, skip_array_check);
1100 }
1101 __ null_check(rsi_array, oopDesc::klass_offset_in_bytes());
1102 __ load_klass(rdx_array_klass, rsi_array);
1103
1104 // Check the array type.
1105 Register rbx_klass = rbx_temp;
1106 __ movptr(rbx_klass, rcx_amh_argument); // this is a Class object!
1107 __ movptr(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
1108
1109 Label ok_array_klass, bad_array_klass, bad_array_length;
1110 __ check_klass_subtype(rdx_array_klass, rbx_klass, rdi, ok_array_klass);
1111 // If we get here, the type check failed!
1112 __ jmp(bad_array_klass);
1113 __ bind(ok_array_klass);
1114
1115 // Check length.
1116 if (length_constant >= 0) {
1117 __ cmpl(Address(rsi_array, length_offset), length_constant);
1118 } else {
1119 Register rbx_vminfo = rbx_temp;
1120 __ movl(rbx_vminfo, rcx_amh_conversion);
1121 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
1122 __ andl(rbx_vminfo, CONV_VMINFO_MASK);
1123 __ cmpl(rbx_vminfo, Address(rsi_array, length_offset));
1124 }
1125 __ jcc(Assembler::notEqual, bad_array_length);
1126
1127 Register rdx_argslot_limit = rdx_temp;
1128
1129 // Array length checks out. Now insert any required stack slots.
1130 if (length_constant == -1) {
1131 // Form a pointer to the end of the affected region.
1132 __ lea(rdx_argslot_limit, Address(rax_argslot, Interpreter::stackElementSize));
1133 // 'stack_move' is negative number of words to insert
1134 Register rdi_stack_move = rdi;
1135 __ movl2ptr(rdi_stack_move, rcx_amh_conversion);
1136 __ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1137 Register rsi_temp = rsi_array; // spill this
1138 insert_arg_slots(_masm, rdi_stack_move, -1,
1139 rax_argslot, rbx_temp, rsi_temp);
1140 // reload the array (since rsi was killed)
1141 __ movptr(rsi_array, vmarg);
1142 } else if (length_constant > 1) {
1143 int arg_mask = 0;
1144 int new_slots = (length_constant - 1);
1145 for (int i = 0; i < new_slots; i++) {
1146 arg_mask <<= 1;
1147 arg_mask |= _INSERT_REF_MASK;
1148 }
1149 insert_arg_slots(_masm, new_slots * stack_move_unit(), arg_mask,
1150 rax_argslot, rbx_temp, rdx_temp);
1151 } else if (length_constant == 1) {
1152 // no stack resizing required
1153 } else if (length_constant == 0) {
1154 remove_arg_slots(_masm, -stack_move_unit(),
1155 rax_argslot, rbx_temp, rdx_temp);
1156 }
1157
1158 // Copy from the array to the new slots.
1159 // Note: Stack change code preserves integrity of rax_argslot pointer.
1160 // So even after slot insertions, rax_argslot still points to first argument.
1161 if (length_constant == -1) {
1162 // [rax_argslot, rdx_argslot_limit) is the area we are inserting into.
1163 Register rsi_source = rsi_array;
1164 __ lea(rsi_source, Address(rsi_array, elem0_offset));
1165 Label loop;
1166 __ bind(loop);
1167 __ movptr(rbx_temp, Address(rsi_source, 0));
1168 __ movptr(Address(rax_argslot, 0), rbx_temp);
1169 __ addptr(rsi_source, type2aelembytes(elem_type));
1170 __ addptr(rax_argslot, Interpreter::stackElementSize);
1171 __ cmpptr(rax_argslot, rdx_argslot_limit);
1172 __ jccb(Assembler::less, loop);
1173 } else if (length_constant == 0) {
1174 __ bind(skip_array_check);
1175 // nothing to copy
1176 } else {
1177 int elem_offset = elem0_offset;
1178 int slot_offset = 0;
1179 for (int index = 0; index < length_constant; index++) {
1180 __ movptr(rbx_temp, Address(rsi_array, elem_offset));
1181 __ movptr(Address(rax_argslot, slot_offset), rbx_temp);
1182 elem_offset += type2aelembytes(elem_type);
1183 slot_offset += Interpreter::stackElementSize;
1184 }
1185 }
1186
1187 // Arguments are spread. Move to next method handle.
1188 UNPUSH_RSI_RDI;
1189 __ movptr(rcx_recv, rcx_mh_vmtarget);
1190 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1191
1192 __ bind(bad_array_klass);
1193 UNPUSH_RSI_RDI;
1194 __ pushptr(Address(rdx_array_klass, java_mirror_offset)); // required type
1195 __ pushptr(vmarg); // bad array
1196 __ push((int)Bytecodes::_aaload); // who is complaining?
1197 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1198
1199 __ bind(bad_array_length);
1200 UNPUSH_RSI_RDI;
1201 __ push(rcx_recv); // AMH requiring a certain length
1202 __ pushptr(vmarg); // bad array
1203 __ push((int)Bytecodes::_arraylength); // who is complaining?
1204 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1205
1206 #undef UNPUSH_RSI_RDI
1207 }
1208 break;
1209
1210 case _adapter_flyby:
1211 case _adapter_ricochet:
1212 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1213 break;
1214
1215 default: ShouldNotReachHere();
1216 }
1217 __ hlt();
1218
1219 address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
1220 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1221
1222 init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
1223 }