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 = temp3_reg;
179 __ regcon_sll_ptr(arg_slots, LogBytesPerWord, offset);
180
181 // Keep the stack pointer 2*wordSize aligned.
182 const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
183 RegisterOrConstant masked_offset = temp_reg;
184 __ regcon_andn_ptr(offset, TwoWordAlignmentMask, masked_offset);
185 __ add(SP, masked_offset, SP);
186
187 __ mov(Gargs, temp_reg); // source pointer for copy
188 __ add(Gargs, offset, Gargs);
189
190 {
191 Label loop;
192 __ bind(loop);
193 // pull one word down each time through the loop
194 __ ld_ptr(Address(temp_reg, 0), temp2_reg);
195 __ st_ptr(temp2_reg, Address(temp_reg, offset));
196 __ add(temp_reg, wordSize, temp_reg);
197 __ cmp(temp_reg, argslot_reg);
198 __ brx(Assembler::less, false, Assembler::pt, loop);
199 __ delayed()->nop(); // FILLME
200 }
201
202 // Now move the argslot down, to point to the opened-up space.
203 __ add(argslot_reg, offset, argslot_reg);
204 }
205
206
207 // Helper to remove argument slots from the stack.
208 // arg_slots must be a multiple of stack_move_unit() and >= 0
209 void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
210 RegisterOrConstant arg_slots,
211 Register argslot_reg,
212 Register temp_reg, Register temp2_reg, Register temp3_reg) {
213 assert(temp3_reg != noreg, "temp3 required");
214 assert_different_registers(argslot_reg, temp_reg, temp2_reg, temp3_reg,
215 (!arg_slots.is_register() ? Gargs : arg_slots.as_register()));
216
217 RegisterOrConstant offset = temp3_reg;
218 __ regcon_sll_ptr(arg_slots, LogBytesPerWord, offset);
219
220 #ifdef ASSERT
221 // Verify that [argslot..argslot+size) lies within (Gargs, FP).
222 __ add(argslot_reg, offset, temp2_reg);
223 verify_argslot(_masm, temp2_reg, temp_reg, "deleted argument(s) must fall within current frame");
224 if (arg_slots.is_register()) {
225 Label L_ok, L_bad;
226 __ cmp(arg_slots.as_register(), (int32_t) NULL_WORD);
227 __ br(Assembler::less, false, Assembler::pn, L_bad);
228 __ delayed()->nop();
229 __ btst(-stack_move_unit() - 1, arg_slots.as_register());
230 __ br(Assembler::zero, false, Assembler::pt, L_ok);
231 __ delayed()->nop();
232 __ bind(L_bad);
233 __ stop("assert arg_slots >= 0 and clear low bits");
234 __ bind(L_ok);
235 } else {
236 assert(arg_slots.as_constant() >= 0, "");
237 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
238 }
239 #endif // ASSERT
240
241 // Pull up everything shallower than argslot.
242 // Then remove the excess space on the stack.
243 // The stacked return address gets pulled up with everything else.
244 // That is, copy [sp, argslot) upward by size words. In pseudo-code:
245 // for (temp = argslot-1; temp >= sp; --temp)
246 // temp[size] = temp[0]
247 // argslot += size;
248 // sp += size;
249 __ sub(argslot_reg, wordSize, temp_reg); // source pointer for copy
250 {
251 Label loop;
252 __ bind(loop);
253 // pull one word up each time through the loop
254 __ ld_ptr(Address(temp_reg, 0), temp2_reg);
255 __ st_ptr(temp2_reg, Address(temp_reg, offset));
256 __ sub(temp_reg, wordSize, temp_reg);
257 __ cmp(temp_reg, Gargs);
258 __ brx(Assembler::greaterEqual, false, Assembler::pt, loop);
259 __ delayed()->nop(); // FILLME
260 }
261
262 // Now move the argslot up, to point to the just-copied block.
263 __ add(Gargs, offset, Gargs);
264 // And adjust the argslot address to point at the deletion point.
265 __ add(argslot_reg, offset, argslot_reg);
266
267 // Keep the stack pointer 2*wordSize aligned.
268 const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
269 RegisterOrConstant masked_offset = temp_reg;
270 __ regcon_andn_ptr(offset, TwoWordAlignmentMask, masked_offset);
271 __ add(SP, masked_offset, SP);
272 }
273
274
275 #ifndef PRODUCT
276 extern "C" void print_method_handle(oop mh);
277 void trace_method_handle_stub(const char* adaptername,
278 oop mh) {
279 #if 0
280 intptr_t* entry_sp,
281 intptr_t* saved_sp,
282 intptr_t* saved_bp) {
283 // called as a leaf from native code: do not block the JVM!
284 intptr_t* last_sp = (intptr_t*) saved_bp[frame::interpreter_frame_last_sp_offset];
285 intptr_t* base_sp = (intptr_t*) saved_bp[frame::interpreter_frame_monitor_block_top_offset];
286 printf("MH %s mh="INTPTR_FORMAT" sp=("INTPTR_FORMAT"+"INTX_FORMAT") stack_size="INTX_FORMAT" bp="INTPTR_FORMAT"\n",
287 adaptername, (intptr_t)mh, (intptr_t)entry_sp, (intptr_t)(saved_sp - entry_sp), (intptr_t)(base_sp - last_sp), (intptr_t)saved_bp);
288 if (last_sp != saved_sp)
289 printf("*** last_sp="INTPTR_FORMAT"\n", (intptr_t)last_sp);
290 #endif
291
292 printf("MH %s mh="INTPTR_FORMAT"\n", adaptername, (intptr_t) mh);
293 print_method_handle(mh);
294 }
295 #endif // PRODUCT
296
297
298 //------------------------------------------------------------------------------
299 // MethodHandles::generate_method_handle_stub
300 //
301 // Generate an "entry" field for a method handle.
302 // This determines how the method handle will respond to calls.
303 void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
304 // Here is the register state during an interpreted call,
305 // as set up by generate_method_handle_interpreter_entry():
306 // - G5: garbage temp (was MethodHandle.invoke methodOop, unused)
307 // - G3: receiver method handle
308 // - O5_savedSP: sender SP (must preserve)
309
310 Register O0_argslot = O0;
311 Register O1_scratch = O1;
312 Register O2_scratch = O2;
313 Register O3_scratch = O3;
314 Register G5_index = G5;
315
316 guarantee(java_dyn_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
317
318 // Some handy addresses:
319 Address G5_method_fie( G5_method, in_bytes(methodOopDesc::from_interpreted_offset()));
320
321 Address G3_mh_vmtarget( G3_method_handle, java_dyn_MethodHandle::vmtarget_offset_in_bytes());
322
323 Address G3_dmh_vmindex( G3_method_handle, sun_dyn_DirectMethodHandle::vmindex_offset_in_bytes());
324
325 Address G3_bmh_vmargslot( G3_method_handle, sun_dyn_BoundMethodHandle::vmargslot_offset_in_bytes());
326 Address G3_bmh_argument( G3_method_handle, sun_dyn_BoundMethodHandle::argument_offset_in_bytes());
327
328 Address G3_amh_vmargslot( G3_method_handle, sun_dyn_AdapterMethodHandle::vmargslot_offset_in_bytes());
329 Address G3_amh_argument ( G3_method_handle, sun_dyn_AdapterMethodHandle::argument_offset_in_bytes());
330 Address G3_amh_conversion(G3_method_handle, sun_dyn_AdapterMethodHandle::conversion_offset_in_bytes());
331
332 const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
333
334 if (have_entry(ek)) {
335 __ nop(); // empty stubs make SG sick
336 return;
337 }
338
339 address interp_entry = __ pc();
340 if (UseCompressedOops) __ unimplemented("UseCompressedOops");
341
342 #ifndef PRODUCT
343 if (TraceMethodHandles) {
344 // save: Gargs, O5_savedSP
345 __ save(SP, -16*wordSize, SP);
346 __ set((intptr_t) entry_name(ek), O0);
347 __ mov(G3_method_handle, O1);
348 __ call_VM_leaf(Lscratch, CAST_FROM_FN_PTR(address, trace_method_handle_stub));
349 __ restore(SP, 16*wordSize, SP);
350 }
351 #endif // PRODUCT
352
353 switch ((int) ek) {
354 case _raise_exception:
355 {
356 // Not a real MH entry, but rather shared code for raising an
357 // exception. Extra local arguments are passed in scratch
358 // registers, as required type in O3, failing object (or NULL)
359 // in O2, failing bytecode type in O1.
360
361 __ mov(O5_savedSP, SP); // Cut the stack back to where the caller started.
362
363 // Push arguments as if coming from the interpreter.
364 Register O0_scratch = O0_argslot;
365 int stackElementSize = Interpreter::stackElementSize();
366
367 // Make space on the stack for the arguments.
368 __ sub(SP, 4*stackElementSize, SP);
369 __ sub(Gargs, 3*stackElementSize, Gargs);
370 //__ sub(Lesp, 3*stackElementSize, Lesp);
371
372 // void raiseException(int code, Object actual, Object required)
373 __ st( O1_scratch, Address(Gargs, 2*stackElementSize)); // code
374 __ st_ptr(O2_scratch, Address(Gargs, 1*stackElementSize)); // actual
375 __ st_ptr(O3_scratch, Address(Gargs, 0*stackElementSize)); // required
376
377 Label no_method;
378 // FIXME: fill in _raise_exception_method with a suitable sun.dyn method
379 __ set(AddressLiteral((address) &_raise_exception_method), G5_method);
380 __ ld_ptr(Address(G5_method, 0), G5_method);
381 __ tst(G5_method);
382 __ brx(Assembler::zero, false, Assembler::pn, no_method);
383 __ delayed()->nop();
384
385 int jobject_oop_offset = 0;
386 __ ld_ptr(Address(G5_method, jobject_oop_offset), G5_method);
387 __ tst(G5_method);
388 __ brx(Assembler::zero, false, Assembler::pn, no_method);
389 __ delayed()->nop();
390
391 __ verify_oop(G5_method);
392 __ jump_indirect_to(G5_method_fie, O1_scratch);
393 __ delayed()->nop();
394
395 // If we get here, the Java runtime did not do its job of creating the exception.
396 // Do something that is at least causes a valid throw from the interpreter.
397 __ bind(no_method);
398 __ unimplemented("_raise_exception no method");
399 }
400 break;
401
402 case _invokestatic_mh:
403 case _invokespecial_mh:
404 {
405 __ ld_ptr(G3_mh_vmtarget, G5_method); // target is a methodOop
406 __ verify_oop(G5_method);
407 // Same as TemplateTable::invokestatic or invokespecial,
408 // minus the CP setup and profiling:
409 if (ek == _invokespecial_mh) {
410 // Must load & check the first argument before entering the target method.
411 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
412 __ ld_ptr(__ argument_address(O0_argslot), G3_method_handle);
413 __ null_check(G3_method_handle);
414 __ verify_oop(G3_method_handle);
415 }
416 __ jump_indirect_to(G5_method_fie, O1_scratch);
417 __ delayed()->nop();
418 }
419 break;
420
421 case _invokevirtual_mh:
422 {
423 // Same as TemplateTable::invokevirtual,
424 // minus the CP setup and profiling:
425
426 // Pick out the vtable index and receiver offset from the MH,
427 // and then we can discard it:
428 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
429 __ ldsw(G3_dmh_vmindex, G5_index);
430 // Note: The verifier allows us to ignore G3_mh_vmtarget.
431 __ ld_ptr(__ argument_address(O0_argslot, -1), G3_method_handle);
432 __ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
433
434 // Get receiver klass:
435 Register O0_klass = O0_argslot;
436 __ load_klass(G3_method_handle, O0_klass);
437 __ verify_oop(O0_klass);
438
439 // Get target methodOop & entry point:
440 const int base = instanceKlass::vtable_start_offset() * wordSize;
441 assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
442
443 __ sll_ptr(G5_index, LogBytesPerWord, G5_index);
444 __ add(O0_klass, G5_index, O0_klass);
445 Address vtable_entry_addr(O0_klass, base + vtableEntry::method_offset_in_bytes());
446 __ ld_ptr(vtable_entry_addr, G5_method);
447
448 __ verify_oop(G5_method);
449 __ jump_indirect_to(G5_method_fie, O1_scratch);
450 __ delayed()->nop();
451 }
452 break;
453
454 case _invokeinterface_mh:
455 {
456 // Same as TemplateTable::invokeinterface,
457 // minus the CP setup and profiling:
458 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
459 Register O1_intf = O1_scratch;
460 __ ld_ptr(G3_mh_vmtarget, O1_intf);
461 __ ldsw(G3_dmh_vmindex, G5_index);
462 __ ld_ptr(__ argument_address(O0_argslot, -1), G3_method_handle);
463 __ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
464
465 // Get receiver klass:
466 Register O0_klass = O0_argslot;
467 __ load_klass(G3_method_handle, O0_klass);
468 __ verify_oop(O0_klass);
469
470 // Get interface:
471 Label no_such_interface;
472 __ verify_oop(O1_intf);
473 __ lookup_interface_method(O0_klass, O1_intf,
474 // Note: next two args must be the same:
475 G5_index, G5_method,
476 O2_scratch,
477 O3_scratch,
478 no_such_interface);
479
480 __ verify_oop(G5_method);
481 __ jump_indirect_to(G5_method_fie, O1_scratch);
482 __ delayed()->nop();
483
484 __ bind(no_such_interface);
485 // Throw an exception.
486 // For historical reasons, it will be IncompatibleClassChangeError.
487 __ unimplemented("not tested yet");
488 __ ld_ptr(Address(O1_intf, java_mirror_offset), O3_scratch); // required interface
489 __ mov(O0_klass, O2_scratch); // bad receiver
490 __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O0_argslot);
491 __ delayed()->mov(Bytecodes::_invokeinterface, O1_scratch); // who is complaining?
492 }
493 break;
494
495 case _bound_ref_mh:
496 case _bound_int_mh:
497 case _bound_long_mh:
498 case _bound_ref_direct_mh:
499 case _bound_int_direct_mh:
500 case _bound_long_direct_mh:
501 {
502 const bool direct_to_method = (ek >= _bound_ref_direct_mh);
503 BasicType arg_type = T_ILLEGAL;
504 int arg_mask = _INSERT_NO_MASK;
505 int arg_slots = -1;
506 get_ek_bound_mh_info(ek, arg_type, arg_mask, arg_slots);
507
508 // Make room for the new argument:
509 __ ldsw(G3_bmh_vmargslot, O0_argslot);
510 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
511
512 insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask, O0_argslot, O1_scratch, O2_scratch, G5_index);
513
514 // Store bound argument into the new stack slot:
515 __ ld_ptr(G3_bmh_argument, O1_scratch);
516 if (arg_type == T_OBJECT) {
517 __ st_ptr(O1_scratch, Address(O0_argslot, 0));
518 } else {
519 Address prim_value_addr(O1_scratch, java_lang_boxing_object::value_offset_in_bytes(arg_type));
520 __ load_sized_value(prim_value_addr, O2_scratch, type2aelembytes(arg_type), is_signed_subword_type(arg_type));
521 if (arg_slots == 2) {
522 __ unimplemented("not yet tested");
523 #ifndef _LP64
524 __ signx(O2_scratch, O3_scratch); // Sign extend
525 #endif
526 __ st_long(O2_scratch, Address(O0_argslot, 0)); // Uses O2/O3 on !_LP64
527 } else {
528 __ st_ptr( O2_scratch, Address(O0_argslot, 0));
529 }
530 }
531
532 if (direct_to_method) {
533 __ ld_ptr(G3_mh_vmtarget, G5_method); // target is a methodOop
534 __ verify_oop(G5_method);
535 __ jump_indirect_to(G5_method_fie, O1_scratch);
536 __ delayed()->nop();
537 } else {
538 __ ld_ptr(G3_mh_vmtarget, G3_method_handle); // target is a methodOop
539 __ verify_oop(G3_method_handle);
540 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
541 }
542 }
543 break;
544
545 case _adapter_retype_only:
546 case _adapter_retype_raw:
547 // Immediately jump to the next MH layer:
548 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
549 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
550 // This is OK when all parameter types widen.
551 // It is also OK when a return type narrows.
552 break;
553
554 case _adapter_check_cast:
555 {
556 // Temps:
557 Register G5_klass = G5_index; // Interesting AMH data.
558
559 // Check a reference argument before jumping to the next layer of MH:
560 __ ldsw(G3_amh_vmargslot, O0_argslot);
561 Address vmarg = __ argument_address(O0_argslot);
562
563 // What class are we casting to?
564 __ ld_ptr(G3_amh_argument, G5_klass); // This is a Class object!
565 __ ld_ptr(Address(G5_klass, java_lang_Class::klass_offset_in_bytes()), G5_klass);
566
567 Label done;
568 __ ld_ptr(vmarg, O1_scratch);
569 __ tst(O1_scratch);
570 __ brx(Assembler::zero, false, Assembler::pn, done); // No cast if null.
571 __ delayed()->nop();
572 __ load_klass(O1_scratch, O1_scratch);
573
574 // Live at this point:
575 // - G5_klass : klass required by the target method
576 // - O1_scratch : argument klass to test
577 // - G3_method_handle: adapter method handle
578 __ check_klass_subtype(O1_scratch, G5_klass, O0_argslot, O2_scratch, done);
579
580 // If we get here, the type check failed!
581 __ ldsw(G3_amh_vmargslot, O0_argslot); // reload argslot field
582 __ ld_ptr(G3_amh_argument, O3_scratch); // required class
583 __ ld_ptr(vmarg, O2_scratch); // bad object
584 __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O0_argslot);
585 __ delayed()->mov(Bytecodes::_checkcast, O1_scratch); // who is complaining?
586
587 __ bind(done);
588 // Get the new MH:
589 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
590 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
591 }
592 break;
593
594 case _adapter_prim_to_prim:
595 case _adapter_ref_to_prim:
596 // Handled completely by optimized cases.
597 __ stop("init_AdapterMethodHandle should not issue this");
598 break;
599
600 case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
601 //case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
602 case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
603 case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
604 {
605 // Perform an in-place conversion to int or an int subword.
606 __ ldsw(G3_amh_vmargslot, O0_argslot);
607 Address vmarg = __ argument_address(O0_argslot);
608 Address value;
609 bool value_left_justified = false;
610
611 switch (ek) {
612 case _adapter_opt_i2i:
613 case _adapter_opt_l2i:
614 __ unimplemented(entry_name(ek));
615 value = vmarg;
616 break;
617 case _adapter_opt_unboxi:
618 {
619 // Load the value up from the heap.
620 __ ld_ptr(vmarg, O1_scratch);
621 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
622 #ifdef ASSERT
623 for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
624 if (is_subword_type(BasicType(bt)))
625 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
626 }
627 #endif
628 __ null_check(O1_scratch, value_offset);
629 value = Address(O1_scratch, value_offset);
630 #ifdef _BIG_ENDIAN
631 // Values stored in objects are packed.
632 value_left_justified = true;
633 #endif
634 }
635 break;
636 default:
637 ShouldNotReachHere();
638 }
639
640 // This check is required on _BIG_ENDIAN
641 Register G5_vminfo = G5_index;
642 __ ldsw(G3_amh_conversion, G5_vminfo);
643 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
644
645 // Original 32-bit vmdata word must be of this form:
646 // | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
647 __ lduw(value, O1_scratch);
648 if (!value_left_justified)
649 __ sll(O1_scratch, G5_vminfo, O1_scratch);
650 Label zero_extend, done;
651 __ btst(CONV_VMINFO_SIGN_FLAG, G5_vminfo);
652 __ br(Assembler::zero, false, Assembler::pn, zero_extend);
653 __ delayed()->nop();
654
655 // this path is taken for int->byte, int->short
656 __ sra(O1_scratch, G5_vminfo, O1_scratch);
657 __ ba(false, done);
658 __ delayed()->nop();
659
660 __ bind(zero_extend);
661 // this is taken for int->char
662 __ srl(O1_scratch, G5_vminfo, O1_scratch);
663
664 __ bind(done);
665 __ st(O1_scratch, vmarg);
666
667 // Get the new MH:
668 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
669 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
670 }
671 break;
672
673 case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
674 case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
675 {
676 // Perform an in-place int-to-long or ref-to-long conversion.
677 __ ldsw(G3_amh_vmargslot, O0_argslot);
678
679 // On big-endian machine we duplicate the slot and store the MSW
680 // in the first slot.
681 __ add(Gargs, __ argument_offset(O0_argslot, 1), O0_argslot);
682
683 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK, O0_argslot, O1_scratch, O2_scratch, G5_index);
684
685 Address arg_lsw(O0_argslot, 0);
686 Address arg_msw(O0_argslot, -Interpreter::stackElementSize());
687
688 switch (ek) {
689 case _adapter_opt_i2l:
690 {
691 __ ldsw(arg_lsw, O2_scratch); // Load LSW
692 #ifndef _LP64
693 __ signx(O2_scratch, O3_scratch); // Sign extend
694 #endif
695 __ st_long(O2_scratch, arg_msw); // Uses O2/O3 on !_LP64
696 }
697 break;
698 case _adapter_opt_unboxl:
699 {
700 // Load the value up from the heap.
701 __ ld_ptr(arg_lsw, O1_scratch);
702 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
703 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
704 __ null_check(O1_scratch, value_offset);
705 __ ld_long(Address(O1_scratch, value_offset), O2_scratch); // Uses O2/O3 on !_LP64
706 __ st_long(O2_scratch, arg_msw);
707 }
708 break;
709 default:
710 ShouldNotReachHere();
711 }
712
713 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
714 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
715 }
716 break;
717
718 case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
719 case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
720 {
721 // perform an in-place floating primitive conversion
722 __ unimplemented(entry_name(ek));
723 }
724 break;
725
726 case _adapter_prim_to_ref:
727 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
728 break;
729
730 case _adapter_swap_args:
731 case _adapter_rot_args:
732 // handled completely by optimized cases
733 __ stop("init_AdapterMethodHandle should not issue this");
734 break;
735
736 case _adapter_opt_swap_1:
737 case _adapter_opt_swap_2:
738 case _adapter_opt_rot_1_up:
739 case _adapter_opt_rot_1_down:
740 case _adapter_opt_rot_2_up:
741 case _adapter_opt_rot_2_down:
742 {
743 int swap_bytes = 0, rotate = 0;
744 get_ek_adapter_opt_swap_rot_info(ek, swap_bytes, rotate);
745
746 // 'argslot' is the position of the first argument to swap.
747 __ ldsw(G3_amh_vmargslot, O0_argslot);
748 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
749
750 // 'vminfo' is the second.
751 Register O1_destslot = O1_scratch;
752 __ ldsw(G3_amh_conversion, O1_destslot);
753 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
754 __ and3(O1_destslot, CONV_VMINFO_MASK, O1_destslot);
755 __ add(Gargs, __ argument_offset(O1_destslot), O1_destslot);
756
757 if (!rotate) {
758 for (int i = 0; i < swap_bytes; i += wordSize) {
759 __ ld_ptr(Address(O0_argslot, i), O2_scratch);
760 __ ld_ptr(Address(O1_destslot, i), O3_scratch);
761 __ st_ptr(O3_scratch, Address(O0_argslot, i));
762 __ st_ptr(O2_scratch, Address(O1_destslot, i));
763 }
764 } else {
765 // Save the first chunk, which is going to get overwritten.
766 switch (swap_bytes) {
767 case 4 : __ lduw(Address(O0_argslot, 0), O2_scratch); break;
768 case 16: __ ldx( Address(O0_argslot, 8), O3_scratch); //fall-thru
769 case 8 : __ ldx( Address(O0_argslot, 0), O2_scratch); break;
770 default: ShouldNotReachHere();
771 }
772
773 if (rotate > 0) {
774 // Rorate upward.
775 __ sub(O0_argslot, swap_bytes, O0_argslot);
776 #if ASSERT
777 {
778 // Verify that argslot > destslot, by at least swap_bytes.
779 Label L_ok;
780 __ cmp(O0_argslot, O1_destslot);
781 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, L_ok);
782 __ delayed()->nop();
783 __ stop("source must be above destination (upward rotation)");
784 __ bind(L_ok);
785 }
786 #endif
787 // Work argslot down to destslot, copying contiguous data upwards.
788 // Pseudo-code:
789 // argslot = src_addr - swap_bytes
790 // destslot = dest_addr
791 // while (argslot >= destslot) {
792 // *(argslot + swap_bytes) = *(argslot + 0);
793 // argslot--;
794 // }
795 Label loop;
796 __ bind(loop);
797 __ ld_ptr(Address(O0_argslot, 0), G5_index);
798 __ st_ptr(G5_index, Address(O0_argslot, swap_bytes));
799 __ sub(O0_argslot, wordSize, O0_argslot);
800 __ cmp(O0_argslot, O1_destslot);
801 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, loop);
802 __ delayed()->nop(); // FILLME
803 } else {
804 __ add(O0_argslot, swap_bytes, O0_argslot);
805 #if ASSERT
806 {
807 // Verify that argslot < destslot, by at least swap_bytes.
808 Label L_ok;
809 __ cmp(O0_argslot, O1_destslot);
810 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok);
811 __ delayed()->nop();
812 __ stop("source must be above destination (upward rotation)");
813 __ bind(L_ok);
814 }
815 #endif
816 // Work argslot up to destslot, copying contiguous data downwards.
817 // Pseudo-code:
818 // argslot = src_addr + swap_bytes
819 // destslot = dest_addr
820 // while (argslot >= destslot) {
821 // *(argslot - swap_bytes) = *(argslot + 0);
822 // argslot++;
823 // }
824 Label loop;
825 __ bind(loop);
826 __ ld_ptr(Address(O0_argslot, 0), G5_index);
827 __ st_ptr(G5_index, Address(O0_argslot, -swap_bytes));
828 __ add(O0_argslot, wordSize, O0_argslot);
829 __ cmp(O0_argslot, O1_destslot);
830 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, loop);
831 __ delayed()->nop(); // FILLME
832 }
833
834 // Store the original first chunk into the destination slot, now free.
835 switch (swap_bytes) {
836 case 4 : __ stw(O2_scratch, Address(O1_destslot, 0)); break;
837 case 16: __ stx(O3_scratch, Address(O1_destslot, 8)); // fall-thru
838 case 8 : __ stx(O2_scratch, Address(O1_destslot, 0)); break;
839 default: ShouldNotReachHere();
840 }
841 }
842
843 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
844 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
845 }
846 break;
847
848 case _adapter_dup_args:
849 {
850 // 'argslot' is the position of the first argument to duplicate.
851 __ ldsw(G3_amh_vmargslot, O0_argslot);
852 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
853
854 // 'stack_move' is negative number of words to duplicate.
855 Register G5_stack_move = G5_index;
856 __ ldsw(G3_amh_conversion, G5_stack_move);
857 __ sra(G5_stack_move, CONV_STACK_MOVE_SHIFT, G5_stack_move);
858
859 // Remember the old Gargs (argslot[0]).
860 Register O1_oldarg = O1_scratch;
861 __ mov(Gargs, O1_oldarg);
862
863 // Move Gargs down to make room for dups.
864 __ sll_ptr(G5_stack_move, LogBytesPerWord, G5_stack_move);
865 __ add(Gargs, G5_stack_move, Gargs);
866
867 // Compute the new Gargs (argslot[0]).
868 Register O2_newarg = O2_scratch;
869 __ mov(Gargs, O2_newarg);
870
871 // Copy from oldarg[0...] down to newarg[0...]
872 // Pseude-code:
873 // O1_oldarg = old-Gargs
874 // O2_newarg = new-Gargs
875 // O0_argslot = argslot
876 // while (O2_newarg < O1_oldarg) *O2_newarg = *O0_argslot++
877 Label loop;
878 __ bind(loop);
879 __ ld_ptr(Address(O0_argslot, 0), O3_scratch);
880 __ st_ptr(O3_scratch, Address(O2_newarg, 0));
881 __ add(O0_argslot, wordSize, O0_argslot);
882 __ add(O2_newarg, wordSize, O2_newarg);
883 __ cmp(O2_newarg, O1_oldarg);
884 __ brx(Assembler::less, false, Assembler::pt, loop);
885 __ delayed()->nop(); // FILLME
886
887 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
888 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
889 }
890 break;
891
892 case _adapter_drop_args:
893 {
894 // 'argslot' is the position of the first argument to nuke.
895 __ ldsw(G3_amh_vmargslot, O0_argslot);
896 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
897
898 // 'stack_move' is number of words to drop.
899 Register G5_stack_move = G5_index;
900 __ ldsw(G3_amh_conversion, G5_stack_move);
901 __ sra(G5_stack_move, CONV_STACK_MOVE_SHIFT, G5_stack_move);
902
903 remove_arg_slots(_masm, G5_stack_move, O0_argslot, O1_scratch, O2_scratch, O3_scratch);
904
905 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
906 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
907 }
908 break;
909
910 case _adapter_collect_args:
911 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
912 break;
913
914 case _adapter_spread_args:
915 // Handled completely by optimized cases.
916 __ stop("init_AdapterMethodHandle should not issue this");
917 break;
918
919 case _adapter_opt_spread_0:
920 case _adapter_opt_spread_1:
921 case _adapter_opt_spread_more:
922 {
923 // spread an array out into a group of arguments
924 __ unimplemented(entry_name(ek));
925 }
926 break;
927
928 case _adapter_flyby:
929 case _adapter_ricochet:
930 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
931 break;
932
933 default:
934 ShouldNotReachHere();
935 }
936
937 address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
938 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
939
940 init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
941 }