1 /*
2 * Copyright 2008-2010 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_sparc.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
63 // Code generation
64 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) {
65 // I5_savedSP: sender SP (must preserve)
66 // G4 (Gargs): incoming argument list (must preserve)
67 // G5_method: invoke methodOop; becomes method type.
68 // G3_method_handle: receiver method handle (must load from sp[MethodTypeForm.vmslots])
69 // O0, O1: garbage temps, blown away
70 Register O0_argslot = O0;
71 Register O1_scratch = O1;
72
73 // emit WrongMethodType path first, to enable back-branch from main path
74 Label wrong_method_type;
75 __ bind(wrong_method_type);
76 __ jump_to(AddressLiteral(Interpreter::throw_WrongMethodType_entry()), O1_scratch);
77 __ delayed()->nop();
78
79 // here's where control starts out:
80 __ align(CodeEntryAlignment);
81 address entry_point = __ pc();
82
83 // fetch the MethodType from the method handle into G5_method_type
84 {
85 Register tem = G5_method;
86 assert(tem == G5_method_type, "yes, it's the same register");
87 for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) {
88 __ ld_ptr(Address(tem, *pchase), G5_method_type);
89 }
90 }
91
92 // given the MethodType, find out where the MH argument is buried
93 __ ld_ptr(Address(G5_method_type, __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, O1_scratch)), O0_argslot);
94 __ ldsw( Address(O0_argslot, __ delayed_value(java_dyn_MethodTypeForm::vmslots_offset_in_bytes, O1_scratch)), O0_argslot);
95 __ ld_ptr(__ argument_address(O0_argslot), G3_method_handle);
96
97 __ check_method_handle_type(G5_method_type, G3_method_handle, O1_scratch, wrong_method_type);
98 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
99
100 return entry_point;
101 }
102
103
104 #ifdef ASSERT
105 static void verify_argslot(MacroAssembler* _masm, Register argslot_reg, Register temp_reg, const char* error_message) {
106 // Verify that argslot lies within (Gargs, FP].
107 Label L_ok, L_bad;
108 #ifdef _LP64
109 __ add(FP, STACK_BIAS, temp_reg);
110 __ cmp(argslot_reg, temp_reg);
111 #else
112 __ cmp(argslot_reg, FP);
113 #endif
114 __ brx(Assembler::greaterUnsigned, false, Assembler::pn, L_bad);
115 __ delayed()->nop();
116 __ cmp(Gargs, argslot_reg);
117 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok);
118 __ delayed()->nop();
119 __ bind(L_bad);
120 __ stop(error_message);
121 __ bind(L_ok);
122 }
123 #endif
124
125
126 // Helper to insert argument slots into the stack.
127 // arg_slots must be a multiple of stack_move_unit() and <= 0
128 void MethodHandles::insert_arg_slots(MacroAssembler* _masm,
129 RegisterOrConstant arg_slots,
130 int arg_mask,
131 Register argslot_reg,
132 Register temp_reg, Register temp2_reg, Register temp3_reg) {
133 assert(temp3_reg != noreg, "temp3 required");
134 assert_different_registers(argslot_reg, temp_reg, temp2_reg, temp3_reg,
135 (!arg_slots.is_register() ? Gargs : arg_slots.as_register()));
136
137 #ifdef ASSERT
138 verify_argslot(_masm, argslot_reg, temp_reg, "insertion point must fall within current frame");
139 if (arg_slots.is_register()) {
140 Label L_ok, L_bad;
141 __ cmp(arg_slots.as_register(), (int32_t) NULL_WORD);
142 __ br(Assembler::greater, false, Assembler::pn, L_bad);
143 __ delayed()->nop();
144 __ btst(-stack_move_unit() - 1, arg_slots.as_register());
145 __ br(Assembler::zero, false, Assembler::pt, L_ok);
146 __ delayed()->nop();
147 __ bind(L_bad);
148 __ stop("assert arg_slots <= 0 and clear low bits");
149 __ bind(L_ok);
150 } else {
151 assert(arg_slots.as_constant() <= 0, "");
152 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
153 }
154 #endif // ASSERT
155
156 #ifdef _LP64
157 if (arg_slots.is_register()) {
158 // Was arg_slots register loaded as signed int?
159 Label L_ok;
160 __ sll(arg_slots.as_register(), BitsPerInt, temp_reg);
161 __ sra(temp_reg, BitsPerInt, temp_reg);
162 __ cmp(arg_slots.as_register(), temp_reg);
163 __ br(Assembler::equal, false, Assembler::pt, L_ok);
164 __ delayed()->nop();
165 __ stop("arg_slots register not loaded as signed int");
166 __ bind(L_ok);
167 }
168 #endif
169
170 // Make space on the stack for the inserted argument(s).
171 // Then pull down everything shallower than argslot_reg.
172 // The stacked return address gets pulled down with everything else.
173 // That is, copy [sp, argslot) downward by -size words. In pseudo-code:
174 // sp -= size;
175 // for (temp = sp + size; temp < argslot; temp++)
176 // temp[-size] = temp[0]
177 // argslot -= size;
178 RegisterOrConstant offset = __ regcon_sll_ptr(arg_slots, LogBytesPerWord, temp3_reg);
179
180 // Keep the stack pointer 2*wordSize aligned.
181 const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
182 RegisterOrConstant masked_offset = __ regcon_andn_ptr(offset, TwoWordAlignmentMask, temp_reg);
183 __ add(SP, masked_offset, SP);
184
185 __ mov(Gargs, temp_reg); // source pointer for copy
186 __ add(Gargs, offset, Gargs);
187
188 {
189 Label loop;
190 __ bind(loop);
191 // pull one word down each time through the loop
192 __ ld_ptr(Address(temp_reg, 0), temp2_reg);
193 __ st_ptr(temp2_reg, Address(temp_reg, offset));
194 __ add(temp_reg, wordSize, temp_reg);
195 __ cmp(temp_reg, argslot_reg);
196 __ brx(Assembler::less, false, Assembler::pt, loop);
197 __ delayed()->nop(); // FILLME
198 }
199
200 // Now move the argslot down, to point to the opened-up space.
201 __ add(argslot_reg, offset, argslot_reg);
202 }
203
204
205 // Helper to remove argument slots from the stack.
206 // arg_slots must be a multiple of stack_move_unit() and >= 0
207 void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
208 RegisterOrConstant arg_slots,
209 Register argslot_reg,
210 Register temp_reg, Register temp2_reg, Register temp3_reg) {
211 assert(temp3_reg != noreg, "temp3 required");
212 assert_different_registers(argslot_reg, temp_reg, temp2_reg, temp3_reg,
213 (!arg_slots.is_register() ? Gargs : arg_slots.as_register()));
214
215 RegisterOrConstant offset = __ regcon_sll_ptr(arg_slots, LogBytesPerWord, temp3_reg);
216
217 #ifdef ASSERT
218 // Verify that [argslot..argslot+size) lies within (Gargs, FP).
219 __ add(argslot_reg, offset, temp2_reg);
220 verify_argslot(_masm, temp2_reg, temp_reg, "deleted argument(s) must fall within current frame");
221 if (arg_slots.is_register()) {
222 Label L_ok, L_bad;
223 __ cmp(arg_slots.as_register(), (int32_t) NULL_WORD);
224 __ br(Assembler::less, false, Assembler::pn, L_bad);
225 __ delayed()->nop();
226 __ btst(-stack_move_unit() - 1, arg_slots.as_register());
227 __ br(Assembler::zero, false, Assembler::pt, L_ok);
228 __ delayed()->nop();
229 __ bind(L_bad);
230 __ stop("assert arg_slots >= 0 and clear low bits");
231 __ bind(L_ok);
232 } else {
233 assert(arg_slots.as_constant() >= 0, "");
234 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
235 }
236 #endif // ASSERT
237
238 // Pull up everything shallower than argslot.
239 // Then remove the excess space on the stack.
240 // The stacked return address gets pulled up with everything else.
241 // That is, copy [sp, argslot) upward by size words. In pseudo-code:
242 // for (temp = argslot-1; temp >= sp; --temp)
243 // temp[size] = temp[0]
244 // argslot += size;
245 // sp += size;
246 __ sub(argslot_reg, wordSize, temp_reg); // source pointer for copy
247 {
248 Label loop;
249 __ bind(loop);
250 // pull one word up each time through the loop
251 __ ld_ptr(Address(temp_reg, 0), temp2_reg);
252 __ st_ptr(temp2_reg, Address(temp_reg, offset));
253 __ sub(temp_reg, wordSize, temp_reg);
254 __ cmp(temp_reg, Gargs);
255 __ brx(Assembler::greaterEqual, false, Assembler::pt, loop);
256 __ delayed()->nop(); // FILLME
257 }
258
259 // Now move the argslot up, to point to the just-copied block.
260 __ add(Gargs, offset, Gargs);
261 // And adjust the argslot address to point at the deletion point.
262 __ add(argslot_reg, offset, argslot_reg);
263
264 // Keep the stack pointer 2*wordSize aligned.
265 const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
266 RegisterOrConstant masked_offset = __ regcon_andn_ptr(offset, TwoWordAlignmentMask, temp_reg);
267 __ add(SP, masked_offset, SP);
268 }
269
270
271 #ifndef PRODUCT
272 extern "C" void print_method_handle(oop mh);
273 void trace_method_handle_stub(const char* adaptername,
274 oop mh) {
275 #if 0
276 intptr_t* entry_sp,
277 intptr_t* saved_sp,
278 intptr_t* saved_bp) {
279 // called as a leaf from native code: do not block the JVM!
280 intptr_t* last_sp = (intptr_t*) saved_bp[frame::interpreter_frame_last_sp_offset];
281 intptr_t* base_sp = (intptr_t*) saved_bp[frame::interpreter_frame_monitor_block_top_offset];
282 printf("MH %s mh="INTPTR_FORMAT" sp=("INTPTR_FORMAT"+"INTX_FORMAT") stack_size="INTX_FORMAT" bp="INTPTR_FORMAT"\n",
283 adaptername, (intptr_t)mh, (intptr_t)entry_sp, (intptr_t)(saved_sp - entry_sp), (intptr_t)(base_sp - last_sp), (intptr_t)saved_bp);
284 if (last_sp != saved_sp)
285 printf("*** last_sp="INTPTR_FORMAT"\n", (intptr_t)last_sp);
286 #endif
287
288 printf("MH %s mh="INTPTR_FORMAT"\n", adaptername, (intptr_t) mh);
289 print_method_handle(mh);
290 }
291 #endif // PRODUCT
292
293
294 //------------------------------------------------------------------------------
295 // MethodHandles::generate_method_handle_stub
296 //
297 // Generate an "entry" field for a method handle.
298 // This determines how the method handle will respond to calls.
299 void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
300 // Here is the register state during an interpreted call,
301 // as set up by generate_method_handle_interpreter_entry():
302 // - G5: garbage temp (was MethodHandle.invoke methodOop, unused)
303 // - G3: receiver method handle
304 // - O5_savedSP: sender SP (must preserve)
305
306 Register O0_argslot = O0;
307 Register O1_scratch = O1;
308 Register O2_scratch = O2;
309 Register O3_scratch = O3;
310 Register G5_index = G5;
311
312 guarantee(java_dyn_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
313
314 // Some handy addresses:
315 Address G5_method_fie( G5_method, in_bytes(methodOopDesc::from_interpreted_offset()));
316
317 Address G3_mh_vmtarget( G3_method_handle, java_dyn_MethodHandle::vmtarget_offset_in_bytes());
318
319 Address G3_dmh_vmindex( G3_method_handle, sun_dyn_DirectMethodHandle::vmindex_offset_in_bytes());
320
321 Address G3_bmh_vmargslot( G3_method_handle, sun_dyn_BoundMethodHandle::vmargslot_offset_in_bytes());
322 Address G3_bmh_argument( G3_method_handle, sun_dyn_BoundMethodHandle::argument_offset_in_bytes());
323
324 Address G3_amh_vmargslot( G3_method_handle, sun_dyn_AdapterMethodHandle::vmargslot_offset_in_bytes());
325 Address G3_amh_argument ( G3_method_handle, sun_dyn_AdapterMethodHandle::argument_offset_in_bytes());
326 Address G3_amh_conversion(G3_method_handle, sun_dyn_AdapterMethodHandle::conversion_offset_in_bytes());
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 // save: Gargs, O5_savedSP
341 __ save(SP, -16*wordSize, SP);
342 __ set((intptr_t) entry_name(ek), O0);
343 __ mov(G3_method_handle, O1);
344 __ call_VM_leaf(Lscratch, CAST_FROM_FN_PTR(address, trace_method_handle_stub));
345 __ restore(SP, 16*wordSize, SP);
346 }
347 #endif // PRODUCT
348
349 switch ((int) ek) {
350 case _raise_exception:
351 {
352 // Not a real MH entry, but rather shared code for raising an
353 // exception. Extra local arguments are passed in scratch
354 // registers, as required type in O3, failing object (or NULL)
355 // in O2, failing bytecode type in O1.
356
357 __ mov(O5_savedSP, SP); // Cut the stack back to where the caller started.
358
359 // Push arguments as if coming from the interpreter.
360 Register O0_scratch = O0_argslot;
361 int stackElementSize = Interpreter::stackElementSize();
362
363 // Make space on the stack for the arguments.
364 __ sub(SP, 4*stackElementSize, SP);
365 __ sub(Gargs, 3*stackElementSize, Gargs);
366 //__ sub(Lesp, 3*stackElementSize, Lesp);
367
368 // void raiseException(int code, Object actual, Object required)
369 __ st( O1_scratch, Address(Gargs, 2*stackElementSize)); // code
370 __ st_ptr(O2_scratch, Address(Gargs, 1*stackElementSize)); // actual
371 __ st_ptr(O3_scratch, Address(Gargs, 0*stackElementSize)); // required
372
373 Label no_method;
374 // FIXME: fill in _raise_exception_method with a suitable sun.dyn method
375 __ set(AddressLiteral((address) &_raise_exception_method), G5_method);
376 __ ld_ptr(Address(G5_method, 0), G5_method);
377 __ tst(G5_method);
378 __ brx(Assembler::zero, false, Assembler::pn, no_method);
379 __ delayed()->nop();
380
381 int jobject_oop_offset = 0;
382 __ ld_ptr(Address(G5_method, jobject_oop_offset), G5_method);
383 __ tst(G5_method);
384 __ brx(Assembler::zero, false, Assembler::pn, no_method);
385 __ delayed()->nop();
386
387 __ verify_oop(G5_method);
388 __ jump_indirect_to(G5_method_fie, O1_scratch);
389 __ delayed()->nop();
390
391 // If we get here, the Java runtime did not do its job of creating the exception.
392 // Do something that is at least causes a valid throw from the interpreter.
393 __ bind(no_method);
394 __ unimplemented("_raise_exception no method");
395 }
396 break;
397
398 case _invokestatic_mh:
399 case _invokespecial_mh:
400 {
401 __ ld_ptr(G3_mh_vmtarget, G5_method); // target is a methodOop
402 __ verify_oop(G5_method);
403 // Same as TemplateTable::invokestatic or invokespecial,
404 // minus the CP setup and profiling:
405 if (ek == _invokespecial_mh) {
406 // Must load & check the first argument before entering the target method.
407 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
408 __ ld_ptr(__ argument_address(O0_argslot), G3_method_handle);
409 __ null_check(G3_method_handle);
410 __ verify_oop(G3_method_handle);
411 }
412 __ jump_indirect_to(G5_method_fie, O1_scratch);
413 __ delayed()->nop();
414 }
415 break;
416
417 case _invokevirtual_mh:
418 {
419 // Same as TemplateTable::invokevirtual,
420 // minus the CP setup and profiling:
421
422 // Pick out the vtable index and receiver offset from the MH,
423 // and then we can discard it:
424 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
425 __ ldsw(G3_dmh_vmindex, G5_index);
426 // Note: The verifier allows us to ignore G3_mh_vmtarget.
427 __ ld_ptr(__ argument_address(O0_argslot, -1), G3_method_handle);
428 __ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
429
430 // Get receiver klass:
431 Register O0_klass = O0_argslot;
432 __ load_klass(G3_method_handle, O0_klass);
433 __ verify_oop(O0_klass);
434
435 // Get target methodOop & entry point:
436 const int base = instanceKlass::vtable_start_offset() * wordSize;
437 assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
438
439 __ sll_ptr(G5_index, LogBytesPerWord, G5_index);
440 __ add(O0_klass, G5_index, O0_klass);
441 Address vtable_entry_addr(O0_klass, base + vtableEntry::method_offset_in_bytes());
442 __ ld_ptr(vtable_entry_addr, G5_method);
443
444 __ verify_oop(G5_method);
445 __ jump_indirect_to(G5_method_fie, O1_scratch);
446 __ delayed()->nop();
447 }
448 break;
449
450 case _invokeinterface_mh:
451 {
452 // Same as TemplateTable::invokeinterface,
453 // minus the CP setup and profiling:
454 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
455 Register O1_intf = O1_scratch;
456 __ ld_ptr(G3_mh_vmtarget, O1_intf);
457 __ ldsw(G3_dmh_vmindex, G5_index);
458 __ ld_ptr(__ argument_address(O0_argslot, -1), G3_method_handle);
459 __ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
460
461 // Get receiver klass:
462 Register O0_klass = O0_argslot;
463 __ load_klass(G3_method_handle, O0_klass);
464 __ verify_oop(O0_klass);
465
466 // Get interface:
467 Label no_such_interface;
468 __ verify_oop(O1_intf);
469 __ lookup_interface_method(O0_klass, O1_intf,
470 // Note: next two args must be the same:
471 G5_index, G5_method,
472 O2_scratch,
473 O3_scratch,
474 no_such_interface);
475
476 __ verify_oop(G5_method);
477 __ jump_indirect_to(G5_method_fie, O1_scratch);
478 __ delayed()->nop();
479
480 __ bind(no_such_interface);
481 // Throw an exception.
482 // For historical reasons, it will be IncompatibleClassChangeError.
483 __ unimplemented("not tested yet");
484 __ ld_ptr(Address(O1_intf, java_mirror_offset), O3_scratch); // required interface
485 __ mov(O0_klass, O2_scratch); // bad receiver
486 __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O0_argslot);
487 __ delayed()->mov(Bytecodes::_invokeinterface, O1_scratch); // who is complaining?
488 }
489 break;
490
491 case _bound_ref_mh:
492 case _bound_int_mh:
493 case _bound_long_mh:
494 case _bound_ref_direct_mh:
495 case _bound_int_direct_mh:
496 case _bound_long_direct_mh:
497 {
498 const bool direct_to_method = (ek >= _bound_ref_direct_mh);
499 BasicType arg_type = T_ILLEGAL;
500 int arg_mask = _INSERT_NO_MASK;
501 int arg_slots = -1;
502 get_ek_bound_mh_info(ek, arg_type, arg_mask, arg_slots);
503
504 // Make room for the new argument:
505 __ ldsw(G3_bmh_vmargslot, O0_argslot);
506 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
507
508 insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask, O0_argslot, O1_scratch, O2_scratch, G5_index);
509
510 // Store bound argument into the new stack slot:
511 __ ld_ptr(G3_bmh_argument, O1_scratch);
512 if (arg_type == T_OBJECT) {
513 __ st_ptr(O1_scratch, Address(O0_argslot, 0));
514 } else {
515 Address prim_value_addr(O1_scratch, java_lang_boxing_object::value_offset_in_bytes(arg_type));
516 __ load_sized_value(prim_value_addr, O2_scratch, type2aelembytes(arg_type), is_signed_subword_type(arg_type));
517 if (arg_slots == 2) {
518 __ unimplemented("not yet tested");
519 #ifndef _LP64
520 __ signx(O2_scratch, O3_scratch); // Sign extend
521 #endif
522 __ st_long(O2_scratch, Address(O0_argslot, 0)); // Uses O2/O3 on !_LP64
523 } else {
524 __ st_ptr( O2_scratch, Address(O0_argslot, 0));
525 }
526 }
527
528 if (direct_to_method) {
529 __ ld_ptr(G3_mh_vmtarget, G5_method); // target is a methodOop
530 __ verify_oop(G5_method);
531 __ jump_indirect_to(G5_method_fie, O1_scratch);
532 __ delayed()->nop();
533 } else {
534 __ ld_ptr(G3_mh_vmtarget, G3_method_handle); // target is a methodOop
535 __ verify_oop(G3_method_handle);
536 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
537 }
538 }
539 break;
540
541 case _adapter_retype_only:
542 case _adapter_retype_raw:
543 // Immediately jump to the next MH layer:
544 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
545 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
546 // This is OK when all parameter types widen.
547 // It is also OK when a return type narrows.
548 break;
549
550 case _adapter_check_cast:
551 {
552 // Temps:
553 Register G5_klass = G5_index; // Interesting AMH data.
554
555 // Check a reference argument before jumping to the next layer of MH:
556 __ ldsw(G3_amh_vmargslot, O0_argslot);
557 Address vmarg = __ argument_address(O0_argslot);
558
559 // What class are we casting to?
560 __ ld_ptr(G3_amh_argument, G5_klass); // This is a Class object!
561 __ ld_ptr(Address(G5_klass, java_lang_Class::klass_offset_in_bytes()), G5_klass);
562
563 Label done;
564 __ ld_ptr(vmarg, O1_scratch);
565 __ tst(O1_scratch);
566 __ brx(Assembler::zero, false, Assembler::pn, done); // No cast if null.
567 __ delayed()->nop();
568 __ load_klass(O1_scratch, O1_scratch);
569
570 // Live at this point:
571 // - G5_klass : klass required by the target method
572 // - O1_scratch : argument klass to test
573 // - G3_method_handle: adapter method handle
574 __ check_klass_subtype(O1_scratch, G5_klass, O0_argslot, O2_scratch, done);
575
576 // If we get here, the type check failed!
577 __ ldsw(G3_amh_vmargslot, O0_argslot); // reload argslot field
578 __ ld_ptr(G3_amh_argument, O3_scratch); // required class
579 __ ld_ptr(vmarg, O2_scratch); // bad object
580 __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O0_argslot);
581 __ delayed()->mov(Bytecodes::_checkcast, O1_scratch); // who is complaining?
582
583 __ bind(done);
584 // Get the new MH:
585 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
586 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
587 }
588 break;
589
590 case _adapter_prim_to_prim:
591 case _adapter_ref_to_prim:
592 // Handled completely by optimized cases.
593 __ stop("init_AdapterMethodHandle should not issue this");
594 break;
595
596 case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
597 //case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
598 case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
599 case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
600 {
601 // Perform an in-place conversion to int or an int subword.
602 __ ldsw(G3_amh_vmargslot, O0_argslot);
603 Address vmarg = __ argument_address(O0_argslot);
604 Address value;
605 bool value_left_justified = false;
606
607 switch (ek) {
608 case _adapter_opt_i2i:
609 case _adapter_opt_l2i:
610 __ unimplemented(entry_name(ek));
611 value = vmarg;
612 break;
613 case _adapter_opt_unboxi:
614 {
615 // Load the value up from the heap.
616 __ ld_ptr(vmarg, O1_scratch);
617 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
618 #ifdef ASSERT
619 for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
620 if (is_subword_type(BasicType(bt)))
621 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
622 }
623 #endif
624 __ null_check(O1_scratch, value_offset);
625 value = Address(O1_scratch, value_offset);
626 #ifdef _BIG_ENDIAN
627 // Values stored in objects are packed.
628 value_left_justified = true;
629 #endif
630 }
631 break;
632 default:
633 ShouldNotReachHere();
634 }
635
636 // This check is required on _BIG_ENDIAN
637 Register G5_vminfo = G5_index;
638 __ ldsw(G3_amh_conversion, G5_vminfo);
639 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
640
641 // Original 32-bit vmdata word must be of this form:
642 // | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
643 __ lduw(value, O1_scratch);
644 if (!value_left_justified)
645 __ sll(O1_scratch, G5_vminfo, O1_scratch);
646 Label zero_extend, done;
647 __ btst(CONV_VMINFO_SIGN_FLAG, G5_vminfo);
648 __ br(Assembler::zero, false, Assembler::pn, zero_extend);
649 __ delayed()->nop();
650
651 // this path is taken for int->byte, int->short
652 __ sra(O1_scratch, G5_vminfo, O1_scratch);
653 __ ba(false, done);
654 __ delayed()->nop();
655
656 __ bind(zero_extend);
657 // this is taken for int->char
658 __ srl(O1_scratch, G5_vminfo, O1_scratch);
659
660 __ bind(done);
661 __ st(O1_scratch, vmarg);
662
663 // Get the new MH:
664 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
665 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
666 }
667 break;
668
669 case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
670 case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
671 {
672 // Perform an in-place int-to-long or ref-to-long conversion.
673 __ ldsw(G3_amh_vmargslot, O0_argslot);
674
675 // On big-endian machine we duplicate the slot and store the MSW
676 // in the first slot.
677 __ add(Gargs, __ argument_offset(O0_argslot, 1), O0_argslot);
678
679 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK, O0_argslot, O1_scratch, O2_scratch, G5_index);
680
681 Address arg_lsw(O0_argslot, 0);
682 Address arg_msw(O0_argslot, -Interpreter::stackElementSize());
683
684 switch (ek) {
685 case _adapter_opt_i2l:
686 {
687 __ ldsw(arg_lsw, O2_scratch); // Load LSW
688 #ifndef _LP64
689 __ signx(O2_scratch, O3_scratch); // Sign extend
690 #endif
691 __ st_long(O2_scratch, arg_msw); // Uses O2/O3 on !_LP64
692 }
693 break;
694 case _adapter_opt_unboxl:
695 {
696 // Load the value up from the heap.
697 __ ld_ptr(arg_lsw, O1_scratch);
698 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
699 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
700 __ null_check(O1_scratch, value_offset);
701 __ ld_long(Address(O1_scratch, value_offset), O2_scratch); // Uses O2/O3 on !_LP64
702 __ st_long(O2_scratch, arg_msw);
703 }
704 break;
705 default:
706 ShouldNotReachHere();
707 }
708
709 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
710 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
711 }
712 break;
713
714 case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
715 case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
716 {
717 // perform an in-place floating primitive conversion
718 __ unimplemented(entry_name(ek));
719 }
720 break;
721
722 case _adapter_prim_to_ref:
723 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
724 break;
725
726 case _adapter_swap_args:
727 case _adapter_rot_args:
728 // handled completely by optimized cases
729 __ stop("init_AdapterMethodHandle should not issue this");
730 break;
731
732 case _adapter_opt_swap_1:
733 case _adapter_opt_swap_2:
734 case _adapter_opt_rot_1_up:
735 case _adapter_opt_rot_1_down:
736 case _adapter_opt_rot_2_up:
737 case _adapter_opt_rot_2_down:
738 {
739 int swap_bytes = 0, rotate = 0;
740 get_ek_adapter_opt_swap_rot_info(ek, swap_bytes, rotate);
741
742 // 'argslot' is the position of the first argument to swap.
743 __ ldsw(G3_amh_vmargslot, O0_argslot);
744 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
745
746 // 'vminfo' is the second.
747 Register O1_destslot = O1_scratch;
748 __ ldsw(G3_amh_conversion, O1_destslot);
749 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
750 __ and3(O1_destslot, CONV_VMINFO_MASK, O1_destslot);
751 __ add(Gargs, __ argument_offset(O1_destslot), O1_destslot);
752
753 if (!rotate) {
754 for (int i = 0; i < swap_bytes; i += wordSize) {
755 __ ld_ptr(Address(O0_argslot, i), O2_scratch);
756 __ ld_ptr(Address(O1_destslot, i), O3_scratch);
757 __ st_ptr(O3_scratch, Address(O0_argslot, i));
758 __ st_ptr(O2_scratch, Address(O1_destslot, i));
759 }
760 } else {
761 // Save the first chunk, which is going to get overwritten.
762 switch (swap_bytes) {
763 case 4 : __ lduw(Address(O0_argslot, 0), O2_scratch); break;
764 case 16: __ ldx( Address(O0_argslot, 8), O3_scratch); //fall-thru
765 case 8 : __ ldx( Address(O0_argslot, 0), O2_scratch); break;
766 default: ShouldNotReachHere();
767 }
768
769 if (rotate > 0) {
770 // Rorate upward.
771 __ sub(O0_argslot, swap_bytes, O0_argslot);
772 #if ASSERT
773 {
774 // Verify that argslot > destslot, by at least swap_bytes.
775 Label L_ok;
776 __ cmp(O0_argslot, O1_destslot);
777 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, L_ok);
778 __ delayed()->nop();
779 __ stop("source must be above destination (upward rotation)");
780 __ bind(L_ok);
781 }
782 #endif
783 // Work argslot down to destslot, copying contiguous data upwards.
784 // Pseudo-code:
785 // argslot = src_addr - swap_bytes
786 // destslot = dest_addr
787 // while (argslot >= destslot) {
788 // *(argslot + swap_bytes) = *(argslot + 0);
789 // argslot--;
790 // }
791 Label loop;
792 __ bind(loop);
793 __ ld_ptr(Address(O0_argslot, 0), G5_index);
794 __ st_ptr(G5_index, Address(O0_argslot, swap_bytes));
795 __ sub(O0_argslot, wordSize, O0_argslot);
796 __ cmp(O0_argslot, O1_destslot);
797 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, loop);
798 __ delayed()->nop(); // FILLME
799 } else {
800 __ add(O0_argslot, swap_bytes, O0_argslot);
801 #if ASSERT
802 {
803 // Verify that argslot < destslot, by at least swap_bytes.
804 Label L_ok;
805 __ cmp(O0_argslot, O1_destslot);
806 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok);
807 __ delayed()->nop();
808 __ stop("source must be above destination (upward rotation)");
809 __ bind(L_ok);
810 }
811 #endif
812 // Work argslot up to destslot, copying contiguous data downwards.
813 // Pseudo-code:
814 // argslot = src_addr + swap_bytes
815 // destslot = dest_addr
816 // while (argslot >= destslot) {
817 // *(argslot - swap_bytes) = *(argslot + 0);
818 // argslot++;
819 // }
820 Label loop;
821 __ bind(loop);
822 __ ld_ptr(Address(O0_argslot, 0), G5_index);
823 __ st_ptr(G5_index, Address(O0_argslot, -swap_bytes));
824 __ add(O0_argslot, wordSize, O0_argslot);
825 __ cmp(O0_argslot, O1_destslot);
826 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, loop);
827 __ delayed()->nop(); // FILLME
828 }
829
830 // Store the original first chunk into the destination slot, now free.
831 switch (swap_bytes) {
832 case 4 : __ stw(O2_scratch, Address(O1_destslot, 0)); break;
833 case 16: __ stx(O3_scratch, Address(O1_destslot, 8)); // fall-thru
834 case 8 : __ stx(O2_scratch, Address(O1_destslot, 0)); break;
835 default: ShouldNotReachHere();
836 }
837 }
838
839 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
840 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
841 }
842 break;
843
844 case _adapter_dup_args:
845 {
846 // 'argslot' is the position of the first argument to duplicate.
847 __ ldsw(G3_amh_vmargslot, O0_argslot);
848 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
849
850 // 'stack_move' is negative number of words to duplicate.
851 Register G5_stack_move = G5_index;
852 __ ldsw(G3_amh_conversion, G5_stack_move);
853 __ sra(G5_stack_move, CONV_STACK_MOVE_SHIFT, G5_stack_move);
854
855 // Remember the old Gargs (argslot[0]).
856 Register O1_oldarg = O1_scratch;
857 __ mov(Gargs, O1_oldarg);
858
859 // Move Gargs down to make room for dups.
860 __ sll_ptr(G5_stack_move, LogBytesPerWord, G5_stack_move);
861 __ add(Gargs, G5_stack_move, Gargs);
862
863 // Compute the new Gargs (argslot[0]).
864 Register O2_newarg = O2_scratch;
865 __ mov(Gargs, O2_newarg);
866
867 // Copy from oldarg[0...] down to newarg[0...]
868 // Pseude-code:
869 // O1_oldarg = old-Gargs
870 // O2_newarg = new-Gargs
871 // O0_argslot = argslot
872 // while (O2_newarg < O1_oldarg) *O2_newarg = *O0_argslot++
873 Label loop;
874 __ bind(loop);
875 __ ld_ptr(Address(O0_argslot, 0), O3_scratch);
876 __ st_ptr(O3_scratch, Address(O2_newarg, 0));
877 __ add(O0_argslot, wordSize, O0_argslot);
878 __ add(O2_newarg, wordSize, O2_newarg);
879 __ cmp(O2_newarg, O1_oldarg);
880 __ brx(Assembler::less, false, Assembler::pt, loop);
881 __ delayed()->nop(); // FILLME
882
883 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
884 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
885 }
886 break;
887
888 case _adapter_drop_args:
889 {
890 // 'argslot' is the position of the first argument to nuke.
891 __ ldsw(G3_amh_vmargslot, O0_argslot);
892 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
893
894 // 'stack_move' is number of words to drop.
895 Register G5_stack_move = G5_index;
896 __ ldsw(G3_amh_conversion, G5_stack_move);
897 __ sra(G5_stack_move, CONV_STACK_MOVE_SHIFT, G5_stack_move);
898
899 remove_arg_slots(_masm, G5_stack_move, O0_argslot, O1_scratch, O2_scratch, O3_scratch);
900
901 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
902 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
903 }
904 break;
905
906 case _adapter_collect_args:
907 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
908 break;
909
910 case _adapter_spread_args:
911 // Handled completely by optimized cases.
912 __ stop("init_AdapterMethodHandle should not issue this");
913 break;
914
915 case _adapter_opt_spread_0:
916 case _adapter_opt_spread_1:
917 case _adapter_opt_spread_more:
918 {
919 // spread an array out into a group of arguments
920 __ unimplemented(entry_name(ek));
921 }
922 break;
923
924 case _adapter_flyby:
925 case _adapter_ricochet:
926 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
927 break;
928
929 default:
930 ShouldNotReachHere();
931 }
932
933 address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
934 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
935
936 init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
937 }