1 /*
2 * Copyright (c) 2000, 2024, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, 2020, Red Hat Inc. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "asm/macroAssembler.inline.hpp"
28 #include "asm/assembler.hpp"
29 #include "c1/c1_CodeStubs.hpp"
30 #include "c1/c1_Compilation.hpp"
31 #include "c1/c1_LIRAssembler.hpp"
32 #include "c1/c1_MacroAssembler.hpp"
33 #include "c1/c1_Runtime1.hpp"
34 #include "c1/c1_ValueStack.hpp"
35 #include "ci/ciArrayKlass.hpp"
36 #include "ci/ciInlineKlass.hpp"
37 #include "ci/ciInstance.hpp"
38 #include "code/compiledIC.hpp"
39 #include "gc/shared/collectedHeap.hpp"
40 #include "gc/shared/gc_globals.hpp"
41 #include "nativeInst_aarch64.hpp"
42 #include "oops/objArrayKlass.hpp"
43 #include "oops/oop.inline.hpp"
44 #include "runtime/frame.inline.hpp"
45 #include "runtime/sharedRuntime.hpp"
46 #include "runtime/stubRoutines.hpp"
47 #include "utilities/powerOfTwo.hpp"
48 #include "vmreg_aarch64.inline.hpp"
49
50
51 #ifndef PRODUCT
52 #define COMMENT(x) do { __ block_comment(x); } while (0)
53 #else
54 #define COMMENT(x)
55 #endif
56
57 NEEDS_CLEANUP // remove this definitions ?
58 const Register SYNC_header = r0; // synchronization header
59 const Register SHIFT_count = r0; // where count for shift operations must be
60
61 #define __ _masm->
62
63
64 static void select_different_registers(Register preserve,
65 Register extra,
66 Register &tmp1,
67 Register &tmp2) {
68 if (tmp1 == preserve) {
69 assert_different_registers(tmp1, tmp2, extra);
70 tmp1 = extra;
71 } else if (tmp2 == preserve) {
72 assert_different_registers(tmp1, tmp2, extra);
73 tmp2 = extra;
74 }
75 assert_different_registers(preserve, tmp1, tmp2);
76 }
77
78
79
80 static void select_different_registers(Register preserve,
81 Register extra,
82 Register &tmp1,
83 Register &tmp2,
84 Register &tmp3) {
85 if (tmp1 == preserve) {
86 assert_different_registers(tmp1, tmp2, tmp3, extra);
87 tmp1 = extra;
88 } else if (tmp2 == preserve) {
89 assert_different_registers(tmp1, tmp2, tmp3, extra);
90 tmp2 = extra;
91 } else if (tmp3 == preserve) {
92 assert_different_registers(tmp1, tmp2, tmp3, extra);
93 tmp3 = extra;
94 }
95 assert_different_registers(preserve, tmp1, tmp2, tmp3);
96 }
97
98
99 bool LIR_Assembler::is_small_constant(LIR_Opr opr) { Unimplemented(); return false; }
100
101
102 LIR_Opr LIR_Assembler::receiverOpr() {
103 return FrameMap::receiver_opr;
104 }
105
106 LIR_Opr LIR_Assembler::osrBufferPointer() {
107 return FrameMap::as_pointer_opr(receiverOpr()->as_register());
108 }
109
110 //--------------fpu register translations-----------------------
111
112
113 address LIR_Assembler::float_constant(float f) {
114 address const_addr = __ float_constant(f);
115 if (const_addr == nullptr) {
116 bailout("const section overflow");
117 return __ code()->consts()->start();
118 } else {
119 return const_addr;
120 }
121 }
122
123
124 address LIR_Assembler::double_constant(double d) {
125 address const_addr = __ double_constant(d);
126 if (const_addr == nullptr) {
127 bailout("const section overflow");
128 return __ code()->consts()->start();
129 } else {
130 return const_addr;
131 }
132 }
133
134 address LIR_Assembler::int_constant(jlong n) {
135 address const_addr = __ long_constant(n);
136 if (const_addr == nullptr) {
137 bailout("const section overflow");
138 return __ code()->consts()->start();
139 } else {
140 return const_addr;
141 }
142 }
143
144 void LIR_Assembler::breakpoint() { Unimplemented(); }
145
146 void LIR_Assembler::push(LIR_Opr opr) { Unimplemented(); }
147
148 void LIR_Assembler::pop(LIR_Opr opr) { Unimplemented(); }
149
150 bool LIR_Assembler::is_literal_address(LIR_Address* addr) { Unimplemented(); return false; }
151 //-------------------------------------------
152
153 static Register as_reg(LIR_Opr op) {
154 return op->is_double_cpu() ? op->as_register_lo() : op->as_register();
155 }
156
157 static jlong as_long(LIR_Opr data) {
158 jlong result;
159 switch (data->type()) {
160 case T_INT:
161 result = (data->as_jint());
162 break;
163 case T_LONG:
164 result = (data->as_jlong());
165 break;
166 default:
167 ShouldNotReachHere();
168 result = 0; // unreachable
169 }
170 return result;
171 }
172
173 Address LIR_Assembler::as_Address(LIR_Address* addr, Register tmp) {
174 Register base = addr->base()->as_pointer_register();
175 LIR_Opr opr = addr->index();
176 if (opr->is_cpu_register()) {
177 Register index;
178 if (opr->is_single_cpu())
179 index = opr->as_register();
180 else
181 index = opr->as_register_lo();
182 assert(addr->disp() == 0, "must be");
183 switch(opr->type()) {
184 case T_INT:
185 return Address(base, index, Address::sxtw(addr->scale()));
186 case T_LONG:
187 return Address(base, index, Address::lsl(addr->scale()));
188 default:
189 ShouldNotReachHere();
190 }
191 } else {
192 assert(addr->scale() == 0,
193 "expected for immediate operand, was: %d", addr->scale());
194 ptrdiff_t offset = ptrdiff_t(addr->disp());
195 // NOTE: Does not handle any 16 byte vector access.
196 const uint type_size = type2aelembytes(addr->type(), true);
197 return __ legitimize_address(Address(base, offset), type_size, tmp);
198 }
199 return Address();
200 }
201
202 Address LIR_Assembler::as_Address_hi(LIR_Address* addr) {
203 ShouldNotReachHere();
204 return Address();
205 }
206
207 Address LIR_Assembler::as_Address(LIR_Address* addr) {
208 return as_Address(addr, rscratch1);
209 }
210
211 Address LIR_Assembler::as_Address_lo(LIR_Address* addr) {
212 return as_Address(addr, rscratch1); // Ouch
213 // FIXME: This needs to be much more clever. See x86.
214 }
215
216 // Ensure a valid Address (base + offset) to a stack-slot. If stack access is
217 // not encodable as a base + (immediate) offset, generate an explicit address
218 // calculation to hold the address in a temporary register.
219 Address LIR_Assembler::stack_slot_address(int index, uint size, Register tmp, int adjust) {
220 precond(size == 4 || size == 8);
221 Address addr = frame_map()->address_for_slot(index, adjust);
222 precond(addr.getMode() == Address::base_plus_offset);
223 precond(addr.base() == sp);
224 precond(addr.offset() > 0);
225 uint mask = size - 1;
226 assert((addr.offset() & mask) == 0, "scaled offsets only");
227 return __ legitimize_address(addr, size, tmp);
228 }
229
230 void LIR_Assembler::osr_entry() {
231 offsets()->set_value(CodeOffsets::OSR_Entry, code_offset());
232 BlockBegin* osr_entry = compilation()->hir()->osr_entry();
233 ValueStack* entry_state = osr_entry->state();
234 int number_of_locks = entry_state->locks_size();
235
236 // we jump here if osr happens with the interpreter
237 // state set up to continue at the beginning of the
238 // loop that triggered osr - in particular, we have
239 // the following registers setup:
240 //
241 // r2: osr buffer
242 //
243
244 // build frame
245 ciMethod* m = compilation()->method();
246 __ build_frame(initial_frame_size_in_bytes(), bang_size_in_bytes());
247
248 // OSR buffer is
249 //
250 // locals[nlocals-1..0]
251 // monitors[0..number_of_locks]
252 //
253 // locals is a direct copy of the interpreter frame so in the osr buffer
254 // so first slot in the local array is the last local from the interpreter
255 // and last slot is local[0] (receiver) from the interpreter
256 //
257 // Similarly with locks. The first lock slot in the osr buffer is the nth lock
258 // from the interpreter frame, the nth lock slot in the osr buffer is 0th lock
259 // in the interpreter frame (the method lock if a sync method)
260
261 // Initialize monitors in the compiled activation.
262 // r2: pointer to osr buffer
263 //
264 // All other registers are dead at this point and the locals will be
265 // copied into place by code emitted in the IR.
266
267 Register OSR_buf = osrBufferPointer()->as_pointer_register();
268 { assert(frame::interpreter_frame_monitor_size() == BasicObjectLock::size(), "adjust code below");
269 int monitor_offset = BytesPerWord * method()->max_locals() +
270 (2 * BytesPerWord) * (number_of_locks - 1);
271 // SharedRuntime::OSR_migration_begin() packs BasicObjectLocks in
272 // the OSR buffer using 2 word entries: first the lock and then
273 // the oop.
274 for (int i = 0; i < number_of_locks; i++) {
275 int slot_offset = monitor_offset - ((i * 2) * BytesPerWord);
276 #ifdef ASSERT
277 // verify the interpreter's monitor has a non-null object
278 {
279 Label L;
280 __ ldr(rscratch1, Address(OSR_buf, slot_offset + 1*BytesPerWord));
281 __ cbnz(rscratch1, L);
282 __ stop("locked object is null");
283 __ bind(L);
284 }
285 #endif
286 __ ldr(r19, Address(OSR_buf, slot_offset));
287 __ ldr(r20, Address(OSR_buf, slot_offset + BytesPerWord));
288 __ str(r19, frame_map()->address_for_monitor_lock(i));
289 __ str(r20, frame_map()->address_for_monitor_object(i));
290 }
291 }
292 }
293
294
295 // inline cache check; done before the frame is built.
296 int LIR_Assembler::check_icache() {
297 return __ ic_check(CodeEntryAlignment);
298 }
299
300 void LIR_Assembler::clinit_barrier(ciMethod* method) {
301 assert(VM_Version::supports_fast_class_init_checks(), "sanity");
302 assert(!method->holder()->is_not_initialized(), "initialization should have been started");
303
304 Label L_skip_barrier;
305
306 __ mov_metadata(rscratch2, method->holder()->constant_encoding());
307 __ clinit_barrier(rscratch2, rscratch1, &L_skip_barrier /*L_fast_path*/);
308 __ far_jump(RuntimeAddress(SharedRuntime::get_handle_wrong_method_stub()));
309 __ bind(L_skip_barrier);
310 }
311
312 void LIR_Assembler::jobject2reg(jobject o, Register reg) {
313 if (o == nullptr) {
314 __ mov(reg, zr);
315 } else {
316 __ movoop(reg, o);
317 }
318 }
319
320 void LIR_Assembler::deoptimize_trap(CodeEmitInfo *info) {
321 address target = nullptr;
322 relocInfo::relocType reloc_type = relocInfo::none;
323
324 switch (patching_id(info)) {
325 case PatchingStub::access_field_id:
326 target = Runtime1::entry_for(Runtime1::access_field_patching_id);
327 reloc_type = relocInfo::section_word_type;
328 break;
329 case PatchingStub::load_klass_id:
330 target = Runtime1::entry_for(Runtime1::load_klass_patching_id);
331 reloc_type = relocInfo::metadata_type;
332 break;
333 case PatchingStub::load_mirror_id:
334 target = Runtime1::entry_for(Runtime1::load_mirror_patching_id);
335 reloc_type = relocInfo::oop_type;
336 break;
337 case PatchingStub::load_appendix_id:
338 target = Runtime1::entry_for(Runtime1::load_appendix_patching_id);
339 reloc_type = relocInfo::oop_type;
340 break;
341 default: ShouldNotReachHere();
342 }
343
344 __ far_call(RuntimeAddress(target));
345 add_call_info_here(info);
346 }
347
348 void LIR_Assembler::jobject2reg_with_patching(Register reg, CodeEmitInfo *info) {
349 deoptimize_trap(info);
350 }
351
352
353 // This specifies the rsp decrement needed to build the frame
354 int LIR_Assembler::initial_frame_size_in_bytes() const {
355 // if rounding, must let FrameMap know!
356
357 return in_bytes(frame_map()->framesize_in_bytes());
358 }
359
360
361 int LIR_Assembler::emit_exception_handler() {
362 // generate code for exception handler
363 address handler_base = __ start_a_stub(exception_handler_size());
364 if (handler_base == nullptr) {
365 // not enough space left for the handler
366 bailout("exception handler overflow");
367 return -1;
368 }
369
370 int offset = code_offset();
371
372 // the exception oop and pc are in r0, and r3
373 // no other registers need to be preserved, so invalidate them
374 __ invalidate_registers(false, true, true, false, true, true);
375
376 // check that there is really an exception
377 __ verify_not_null_oop(r0);
378
379 // search an exception handler (r0: exception oop, r3: throwing pc)
380 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::handle_exception_from_callee_id)));
381 __ should_not_reach_here();
382 guarantee(code_offset() - offset <= exception_handler_size(), "overflow");
383 __ end_a_stub();
384
385 return offset;
386 }
387
388
389 // Emit the code to remove the frame from the stack in the exception
390 // unwind path.
391 int LIR_Assembler::emit_unwind_handler() {
392 #ifndef PRODUCT
393 if (CommentedAssembly) {
394 _masm->block_comment("Unwind handler");
395 }
396 #endif
397
398 int offset = code_offset();
399
400 // Fetch the exception from TLS and clear out exception related thread state
401 __ ldr(r0, Address(rthread, JavaThread::exception_oop_offset()));
402 __ str(zr, Address(rthread, JavaThread::exception_oop_offset()));
403 __ str(zr, Address(rthread, JavaThread::exception_pc_offset()));
404
405 __ bind(_unwind_handler_entry);
406 __ verify_not_null_oop(r0);
407 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
408 __ mov(r19, r0); // Preserve the exception
409 }
410
411 // Perform needed unlocking
412 MonitorExitStub* stub = nullptr;
413 if (method()->is_synchronized()) {
414 monitor_address(0, FrameMap::r0_opr);
415 stub = new MonitorExitStub(FrameMap::r0_opr, true, 0);
416 if (LockingMode == LM_MONITOR) {
417 __ b(*stub->entry());
418 } else {
419 __ unlock_object(r5, r4, r0, r6, *stub->entry());
420 }
421 __ bind(*stub->continuation());
422 }
423
424 if (compilation()->env()->dtrace_method_probes()) {
425 __ mov(c_rarg0, rthread);
426 __ mov_metadata(c_rarg1, method()->constant_encoding());
427 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), c_rarg0, c_rarg1);
428 }
429
430 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
431 __ mov(r0, r19); // Restore the exception
432 }
433
434 // remove the activation and dispatch to the unwind handler
435 __ block_comment("remove_frame and dispatch to the unwind handler");
436 __ remove_frame(initial_frame_size_in_bytes(), needs_stack_repair());
437 __ far_jump(RuntimeAddress(Runtime1::entry_for(Runtime1::unwind_exception_id)));
438
439 // Emit the slow path assembly
440 if (stub != nullptr) {
441 stub->emit_code(this);
442 }
443
444 return offset;
445 }
446
447
448 int LIR_Assembler::emit_deopt_handler() {
449 // generate code for exception handler
450 address handler_base = __ start_a_stub(deopt_handler_size());
451 if (handler_base == nullptr) {
452 // not enough space left for the handler
453 bailout("deopt handler overflow");
454 return -1;
455 }
456
457 int offset = code_offset();
458
459 __ adr(lr, pc());
460 __ far_jump(RuntimeAddress(SharedRuntime::deopt_blob()->unpack()));
461 guarantee(code_offset() - offset <= deopt_handler_size(), "overflow");
462 __ end_a_stub();
463
464 return offset;
465 }
466
467 void LIR_Assembler::add_debug_info_for_branch(address adr, CodeEmitInfo* info) {
468 _masm->code_section()->relocate(adr, relocInfo::poll_type);
469 int pc_offset = code_offset();
470 flush_debug_info(pc_offset);
471 info->record_debug_info(compilation()->debug_info_recorder(), pc_offset);
472 if (info->exception_handlers() != nullptr) {
473 compilation()->add_exception_handlers_for_pco(pc_offset, info->exception_handlers());
474 }
475 }
476
477 void LIR_Assembler::return_op(LIR_Opr result, C1SafepointPollStub* code_stub) {
478 assert(result->is_illegal() || !result->is_single_cpu() || result->as_register() == r0, "word returns are in r0,");
479
480 if (InlineTypeReturnedAsFields) {
481 // Check if we are returning an non-null inline type and load its fields into registers
482 ciType* return_type = compilation()->method()->return_type();
483 if (return_type->is_inlinetype()) {
484 ciInlineKlass* vk = return_type->as_inline_klass();
485 if (vk->can_be_returned_as_fields()) {
486 address unpack_handler = vk->unpack_handler();
487 assert(unpack_handler != nullptr, "must be");
488 __ far_call(RuntimeAddress(unpack_handler));
489 }
490 } else if (return_type->is_instance_klass() && (!return_type->is_loaded() || StressCallingConvention)) {
491 Label skip;
492 __ test_oop_is_not_inline_type(r0, rscratch2, skip);
493
494 // Load fields from a buffered value with an inline class specific handler
495 __ load_klass(rscratch1 /*dst*/, r0 /*src*/);
496 __ ldr(rscratch1, Address(rscratch1, InstanceKlass::adr_inlineklass_fixed_block_offset()));
497 __ ldr(rscratch1, Address(rscratch1, InlineKlass::unpack_handler_offset()));
498 // Unpack handler can be null if inline type is not scalarizable in returns
499 __ cbz(rscratch1, skip);
500 __ blr(rscratch1);
501
502 __ bind(skip);
503 }
504 // At this point, r0 points to the value object (for interpreter or C1 caller).
505 // The fields of the object are copied into registers (for C2 caller).
506 }
507
508 // Pop the stack before the safepoint code
509 __ remove_frame(initial_frame_size_in_bytes(), needs_stack_repair());
510
511 if (StackReservedPages > 0 && compilation()->has_reserved_stack_access()) {
512 __ reserved_stack_check();
513 }
514
515 code_stub->set_safepoint_offset(__ offset());
516 __ relocate(relocInfo::poll_return_type);
517 __ safepoint_poll(*code_stub->entry(), true /* at_return */, false /* acquire */, true /* in_nmethod */);
518 __ ret(lr);
519 }
520
521 int LIR_Assembler::store_inline_type_fields_to_buf(ciInlineKlass* vk) {
522 return (__ store_inline_type_fields_to_buf(vk, false));
523 }
524
525 int LIR_Assembler::safepoint_poll(LIR_Opr tmp, CodeEmitInfo* info) {
526 guarantee(info != nullptr, "Shouldn't be null");
527 __ get_polling_page(rscratch1, relocInfo::poll_type);
528 add_debug_info_for_branch(info); // This isn't just debug info:
529 // it's the oop map
530 __ read_polling_page(rscratch1, relocInfo::poll_type);
531 return __ offset();
532 }
533
534
535 void LIR_Assembler::move_regs(Register from_reg, Register to_reg) {
536 if (from_reg == r31_sp)
537 from_reg = sp;
538 if (to_reg == r31_sp)
539 to_reg = sp;
540 __ mov(to_reg, from_reg);
541 }
542
543 void LIR_Assembler::swap_reg(Register a, Register b) { Unimplemented(); }
544
545
546 void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) {
547 assert(src->is_constant(), "should not call otherwise");
548 assert(dest->is_register(), "should not call otherwise");
549 LIR_Const* c = src->as_constant_ptr();
550
551 switch (c->type()) {
552 case T_INT: {
553 assert(patch_code == lir_patch_none, "no patching handled here");
554 __ movw(dest->as_register(), c->as_jint());
555 break;
556 }
557
558 case T_ADDRESS: {
559 assert(patch_code == lir_patch_none, "no patching handled here");
560 __ mov(dest->as_register(), c->as_jint());
561 break;
562 }
563
564 case T_LONG: {
565 assert(patch_code == lir_patch_none, "no patching handled here");
566 __ mov(dest->as_register_lo(), (intptr_t)c->as_jlong());
567 break;
568 }
569
570 case T_OBJECT: {
571 if (patch_code != lir_patch_none) {
572 jobject2reg_with_patching(dest->as_register(), info);
573 } else {
574 jobject2reg(c->as_jobject(), dest->as_register());
575 }
576 break;
577 }
578
579 case T_METADATA: {
580 if (patch_code != lir_patch_none) {
581 klass2reg_with_patching(dest->as_register(), info);
582 } else {
583 __ mov_metadata(dest->as_register(), c->as_metadata());
584 }
585 break;
586 }
587
588 case T_FLOAT: {
589 if (__ operand_valid_for_float_immediate(c->as_jfloat())) {
590 __ fmovs(dest->as_float_reg(), (c->as_jfloat()));
591 } else {
592 __ adr(rscratch1, InternalAddress(float_constant(c->as_jfloat())));
593 __ ldrs(dest->as_float_reg(), Address(rscratch1));
594 }
595 break;
596 }
597
598 case T_DOUBLE: {
599 if (__ operand_valid_for_float_immediate(c->as_jdouble())) {
600 __ fmovd(dest->as_double_reg(), (c->as_jdouble()));
601 } else {
602 __ adr(rscratch1, InternalAddress(double_constant(c->as_jdouble())));
603 __ ldrd(dest->as_double_reg(), Address(rscratch1));
604 }
605 break;
606 }
607
608 default:
609 ShouldNotReachHere();
610 }
611 }
612
613 void LIR_Assembler::const2stack(LIR_Opr src, LIR_Opr dest) {
614 LIR_Const* c = src->as_constant_ptr();
615 switch (c->type()) {
616 case T_OBJECT:
617 {
618 if (! c->as_jobject())
619 __ str(zr, frame_map()->address_for_slot(dest->single_stack_ix()));
620 else {
621 const2reg(src, FrameMap::rscratch1_opr, lir_patch_none, nullptr);
622 reg2stack(FrameMap::rscratch1_opr, dest, c->type(), false);
623 }
624 }
625 break;
626 case T_ADDRESS:
627 {
628 const2reg(src, FrameMap::rscratch1_opr, lir_patch_none, nullptr);
629 reg2stack(FrameMap::rscratch1_opr, dest, c->type(), false);
630 }
631 case T_INT:
632 case T_FLOAT:
633 {
634 Register reg = zr;
635 if (c->as_jint_bits() == 0)
636 __ strw(zr, frame_map()->address_for_slot(dest->single_stack_ix()));
637 else {
638 __ movw(rscratch1, c->as_jint_bits());
639 __ strw(rscratch1, frame_map()->address_for_slot(dest->single_stack_ix()));
640 }
641 }
642 break;
643 case T_LONG:
644 case T_DOUBLE:
645 {
646 Register reg = zr;
647 if (c->as_jlong_bits() == 0)
648 __ str(zr, frame_map()->address_for_slot(dest->double_stack_ix(),
649 lo_word_offset_in_bytes));
650 else {
651 __ mov(rscratch1, (intptr_t)c->as_jlong_bits());
652 __ str(rscratch1, frame_map()->address_for_slot(dest->double_stack_ix(),
653 lo_word_offset_in_bytes));
654 }
655 }
656 break;
657 default:
658 ShouldNotReachHere();
659 }
660 }
661
662 void LIR_Assembler::const2mem(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info, bool wide) {
663 assert(src->is_constant(), "should not call otherwise");
664 LIR_Const* c = src->as_constant_ptr();
665 LIR_Address* to_addr = dest->as_address_ptr();
666
667 void (Assembler::* insn)(Register Rt, const Address &adr);
668
669 switch (type) {
670 case T_ADDRESS:
671 assert(c->as_jint() == 0, "should be");
672 insn = &Assembler::str;
673 break;
674 case T_LONG:
675 assert(c->as_jlong() == 0, "should be");
676 insn = &Assembler::str;
677 break;
678 case T_INT:
679 assert(c->as_jint() == 0, "should be");
680 insn = &Assembler::strw;
681 break;
682 case T_OBJECT:
683 case T_ARRAY:
684 // Non-null case is not handled on aarch64 but handled on x86
685 // FIXME: do we need to add it here?
686 assert(c->as_jobject() == 0, "should be");
687 if (UseCompressedOops && !wide) {
688 insn = &Assembler::strw;
689 } else {
690 insn = &Assembler::str;
691 }
692 break;
693 case T_CHAR:
694 case T_SHORT:
695 assert(c->as_jint() == 0, "should be");
696 insn = &Assembler::strh;
697 break;
698 case T_BOOLEAN:
699 case T_BYTE:
700 assert(c->as_jint() == 0, "should be");
701 insn = &Assembler::strb;
702 break;
703 default:
704 ShouldNotReachHere();
705 insn = &Assembler::str; // unreachable
706 }
707
708 if (info) add_debug_info_for_null_check_here(info);
709 (_masm->*insn)(zr, as_Address(to_addr, rscratch1));
710 }
711
712 void LIR_Assembler::reg2reg(LIR_Opr src, LIR_Opr dest) {
713 assert(src->is_register(), "should not call otherwise");
714 assert(dest->is_register(), "should not call otherwise");
715
716 // move between cpu-registers
717 if (dest->is_single_cpu()) {
718 if (src->type() == T_LONG) {
719 // Can do LONG -> OBJECT
720 move_regs(src->as_register_lo(), dest->as_register());
721 return;
722 }
723 assert(src->is_single_cpu(), "must match");
724 if (src->type() == T_OBJECT) {
725 __ verify_oop(src->as_register());
726 }
727 move_regs(src->as_register(), dest->as_register());
728
729 } else if (dest->is_double_cpu()) {
730 if (is_reference_type(src->type())) {
731 // Surprising to me but we can see move of a long to t_object
732 __ verify_oop(src->as_register());
733 move_regs(src->as_register(), dest->as_register_lo());
734 return;
735 }
736 assert(src->is_double_cpu(), "must match");
737 Register f_lo = src->as_register_lo();
738 Register f_hi = src->as_register_hi();
739 Register t_lo = dest->as_register_lo();
740 Register t_hi = dest->as_register_hi();
741 assert(f_hi == f_lo, "must be same");
742 assert(t_hi == t_lo, "must be same");
743 move_regs(f_lo, t_lo);
744
745 } else if (dest->is_single_fpu()) {
746 __ fmovs(dest->as_float_reg(), src->as_float_reg());
747
748 } else if (dest->is_double_fpu()) {
749 __ fmovd(dest->as_double_reg(), src->as_double_reg());
750
751 } else {
752 ShouldNotReachHere();
753 }
754 }
755
756 void LIR_Assembler::reg2stack(LIR_Opr src, LIR_Opr dest, BasicType type, bool pop_fpu_stack) {
757 precond(src->is_register() && dest->is_stack());
758
759 uint const c_sz32 = sizeof(uint32_t);
760 uint const c_sz64 = sizeof(uint64_t);
761
762 if (src->is_single_cpu()) {
763 int index = dest->single_stack_ix();
764 if (is_reference_type(type)) {
765 __ str(src->as_register(), stack_slot_address(index, c_sz64, rscratch1));
766 __ verify_oop(src->as_register());
767 } else if (type == T_METADATA || type == T_DOUBLE || type == T_ADDRESS) {
768 __ str(src->as_register(), stack_slot_address(index, c_sz64, rscratch1));
769 } else {
770 __ strw(src->as_register(), stack_slot_address(index, c_sz32, rscratch1));
771 }
772
773 } else if (src->is_double_cpu()) {
774 int index = dest->double_stack_ix();
775 Address dest_addr_LO = stack_slot_address(index, c_sz64, rscratch1, lo_word_offset_in_bytes);
776 __ str(src->as_register_lo(), dest_addr_LO);
777
778 } else if (src->is_single_fpu()) {
779 int index = dest->single_stack_ix();
780 __ strs(src->as_float_reg(), stack_slot_address(index, c_sz32, rscratch1));
781
782 } else if (src->is_double_fpu()) {
783 int index = dest->double_stack_ix();
784 __ strd(src->as_double_reg(), stack_slot_address(index, c_sz64, rscratch1));
785
786 } else {
787 ShouldNotReachHere();
788 }
789 }
790
791
792 void LIR_Assembler::reg2mem(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool pop_fpu_stack, bool wide) {
793 LIR_Address* to_addr = dest->as_address_ptr();
794 PatchingStub* patch = nullptr;
795 Register compressed_src = rscratch1;
796
797 if (patch_code != lir_patch_none) {
798 deoptimize_trap(info);
799 return;
800 }
801
802 if (is_reference_type(type)) {
803 __ verify_oop(src->as_register());
804
805 if (UseCompressedOops && !wide) {
806 __ encode_heap_oop(compressed_src, src->as_register());
807 } else {
808 compressed_src = src->as_register();
809 }
810 }
811
812 int null_check_here = code_offset();
813 switch (type) {
814 case T_FLOAT: {
815 __ strs(src->as_float_reg(), as_Address(to_addr));
816 break;
817 }
818
819 case T_DOUBLE: {
820 __ strd(src->as_double_reg(), as_Address(to_addr));
821 break;
822 }
823
824 case T_ARRAY: // fall through
825 case T_OBJECT: // fall through
826 if (UseCompressedOops && !wide) {
827 __ strw(compressed_src, as_Address(to_addr, rscratch2));
828 } else {
829 __ str(compressed_src, as_Address(to_addr));
830 }
831 break;
832 case T_METADATA:
833 // We get here to store a method pointer to the stack to pass to
834 // a dtrace runtime call. This can't work on 64 bit with
835 // compressed klass ptrs: T_METADATA can be a compressed klass
836 // ptr or a 64 bit method pointer.
837 ShouldNotReachHere();
838 __ str(src->as_register(), as_Address(to_addr));
839 break;
840 case T_ADDRESS:
841 __ str(src->as_register(), as_Address(to_addr));
842 break;
843 case T_INT:
844 __ strw(src->as_register(), as_Address(to_addr));
845 break;
846
847 case T_LONG: {
848 __ str(src->as_register_lo(), as_Address_lo(to_addr));
849 break;
850 }
851
852 case T_BYTE: // fall through
853 case T_BOOLEAN: {
854 __ strb(src->as_register(), as_Address(to_addr));
855 break;
856 }
857
858 case T_CHAR: // fall through
859 case T_SHORT:
860 __ strh(src->as_register(), as_Address(to_addr));
861 break;
862
863 default:
864 ShouldNotReachHere();
865 }
866 if (info != nullptr) {
867 add_debug_info_for_null_check(null_check_here, info);
868 }
869 }
870
871
872 void LIR_Assembler::stack2reg(LIR_Opr src, LIR_Opr dest, BasicType type) {
873 precond(src->is_stack() && dest->is_register());
874
875 uint const c_sz32 = sizeof(uint32_t);
876 uint const c_sz64 = sizeof(uint64_t);
877
878 if (dest->is_single_cpu()) {
879 int index = src->single_stack_ix();
880 if (is_reference_type(type)) {
881 __ ldr(dest->as_register(), stack_slot_address(index, c_sz64, rscratch1));
882 __ verify_oop(dest->as_register());
883 } else if (type == T_METADATA || type == T_ADDRESS) {
884 __ ldr(dest->as_register(), stack_slot_address(index, c_sz64, rscratch1));
885 } else {
886 __ ldrw(dest->as_register(), stack_slot_address(index, c_sz32, rscratch1));
887 }
888
889 } else if (dest->is_double_cpu()) {
890 int index = src->double_stack_ix();
891 Address src_addr_LO = stack_slot_address(index, c_sz64, rscratch1, lo_word_offset_in_bytes);
892 __ ldr(dest->as_register_lo(), src_addr_LO);
893
894 } else if (dest->is_single_fpu()) {
895 int index = src->single_stack_ix();
896 __ ldrs(dest->as_float_reg(), stack_slot_address(index, c_sz32, rscratch1));
897
898 } else if (dest->is_double_fpu()) {
899 int index = src->double_stack_ix();
900 __ ldrd(dest->as_double_reg(), stack_slot_address(index, c_sz64, rscratch1));
901
902 } else {
903 ShouldNotReachHere();
904 }
905 }
906
907
908 void LIR_Assembler::klass2reg_with_patching(Register reg, CodeEmitInfo* info) {
909 address target = nullptr;
910 relocInfo::relocType reloc_type = relocInfo::none;
911
912 switch (patching_id(info)) {
913 case PatchingStub::access_field_id:
914 target = Runtime1::entry_for(Runtime1::access_field_patching_id);
915 reloc_type = relocInfo::section_word_type;
916 break;
917 case PatchingStub::load_klass_id:
918 target = Runtime1::entry_for(Runtime1::load_klass_patching_id);
919 reloc_type = relocInfo::metadata_type;
920 break;
921 case PatchingStub::load_mirror_id:
922 target = Runtime1::entry_for(Runtime1::load_mirror_patching_id);
923 reloc_type = relocInfo::oop_type;
924 break;
925 case PatchingStub::load_appendix_id:
926 target = Runtime1::entry_for(Runtime1::load_appendix_patching_id);
927 reloc_type = relocInfo::oop_type;
928 break;
929 default: ShouldNotReachHere();
930 }
931
932 __ far_call(RuntimeAddress(target));
933 add_call_info_here(info);
934 }
935
936 void LIR_Assembler::stack2stack(LIR_Opr src, LIR_Opr dest, BasicType type) {
937
938 LIR_Opr temp;
939 if (type == T_LONG || type == T_DOUBLE)
940 temp = FrameMap::rscratch1_long_opr;
941 else
942 temp = FrameMap::rscratch1_opr;
943
944 stack2reg(src, temp, src->type());
945 reg2stack(temp, dest, dest->type(), false);
946 }
947
948
949 void LIR_Assembler::mem2reg(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool wide) {
950 LIR_Address* addr = src->as_address_ptr();
951 LIR_Address* from_addr = src->as_address_ptr();
952
953 if (addr->base()->type() == T_OBJECT) {
954 __ verify_oop(addr->base()->as_pointer_register());
955 }
956
957 if (patch_code != lir_patch_none) {
958 deoptimize_trap(info);
959 return;
960 }
961
962 if (info != nullptr) {
963 add_debug_info_for_null_check_here(info);
964 }
965 int null_check_here = code_offset();
966 switch (type) {
967 case T_FLOAT: {
968 __ ldrs(dest->as_float_reg(), as_Address(from_addr));
969 break;
970 }
971
972 case T_DOUBLE: {
973 __ ldrd(dest->as_double_reg(), as_Address(from_addr));
974 break;
975 }
976
977 case T_ARRAY: // fall through
978 case T_OBJECT: // fall through
979 if (UseCompressedOops && !wide) {
980 __ ldrw(dest->as_register(), as_Address(from_addr));
981 } else {
982 __ ldr(dest->as_register(), as_Address(from_addr));
983 }
984 break;
985 case T_METADATA:
986 // We get here to store a method pointer to the stack to pass to
987 // a dtrace runtime call. This can't work on 64 bit with
988 // compressed klass ptrs: T_METADATA can be a compressed klass
989 // ptr or a 64 bit method pointer.
990 ShouldNotReachHere();
991 __ ldr(dest->as_register(), as_Address(from_addr));
992 break;
993 case T_ADDRESS:
994 __ ldr(dest->as_register(), as_Address(from_addr));
995 break;
996 case T_INT:
997 __ ldrw(dest->as_register(), as_Address(from_addr));
998 break;
999
1000 case T_LONG: {
1001 __ ldr(dest->as_register_lo(), as_Address_lo(from_addr));
1002 break;
1003 }
1004
1005 case T_BYTE:
1006 __ ldrsb(dest->as_register(), as_Address(from_addr));
1007 break;
1008 case T_BOOLEAN: {
1009 __ ldrb(dest->as_register(), as_Address(from_addr));
1010 break;
1011 }
1012
1013 case T_CHAR:
1014 __ ldrh(dest->as_register(), as_Address(from_addr));
1015 break;
1016 case T_SHORT:
1017 __ ldrsh(dest->as_register(), as_Address(from_addr));
1018 break;
1019
1020 default:
1021 ShouldNotReachHere();
1022 }
1023
1024 if (is_reference_type(type)) {
1025 if (UseCompressedOops && !wide) {
1026 __ decode_heap_oop(dest->as_register());
1027 }
1028
1029 if (!(UseZGC && !ZGenerational)) {
1030 // Load barrier has not yet been applied, so ZGC can't verify the oop here
1031 __ verify_oop(dest->as_register());
1032 }
1033 }
1034 }
1035
1036 void LIR_Assembler::move(LIR_Opr src, LIR_Opr dst) {
1037 assert(dst->is_cpu_register(), "must be");
1038 assert(dst->type() == src->type(), "must be");
1039
1040 if (src->is_cpu_register()) {
1041 reg2reg(src, dst);
1042 } else if (src->is_stack()) {
1043 stack2reg(src, dst, dst->type());
1044 } else if (src->is_constant()) {
1045 const2reg(src, dst, lir_patch_none, nullptr);
1046 } else {
1047 ShouldNotReachHere();
1048 }
1049 }
1050
1051 int LIR_Assembler::array_element_size(BasicType type) const {
1052 int elem_size = type2aelembytes(type);
1053 return exact_log2(elem_size);
1054 }
1055
1056
1057 void LIR_Assembler::emit_op3(LIR_Op3* op) {
1058 switch (op->code()) {
1059 case lir_idiv:
1060 case lir_irem:
1061 arithmetic_idiv(op->code(),
1062 op->in_opr1(),
1063 op->in_opr2(),
1064 op->in_opr3(),
1065 op->result_opr(),
1066 op->info());
1067 break;
1068 case lir_fmad:
1069 __ fmaddd(op->result_opr()->as_double_reg(),
1070 op->in_opr1()->as_double_reg(),
1071 op->in_opr2()->as_double_reg(),
1072 op->in_opr3()->as_double_reg());
1073 break;
1074 case lir_fmaf:
1075 __ fmadds(op->result_opr()->as_float_reg(),
1076 op->in_opr1()->as_float_reg(),
1077 op->in_opr2()->as_float_reg(),
1078 op->in_opr3()->as_float_reg());
1079 break;
1080 default: ShouldNotReachHere(); break;
1081 }
1082 }
1083
1084 void LIR_Assembler::emit_opBranch(LIR_OpBranch* op) {
1085 #ifdef ASSERT
1086 assert(op->block() == nullptr || op->block()->label() == op->label(), "wrong label");
1087 if (op->block() != nullptr) _branch_target_blocks.append(op->block());
1088 if (op->ublock() != nullptr) _branch_target_blocks.append(op->ublock());
1089 #endif
1090
1091 if (op->cond() == lir_cond_always) {
1092 if (op->info() != nullptr) add_debug_info_for_branch(op->info());
1093 __ b(*(op->label()));
1094 } else {
1095 Assembler::Condition acond;
1096 if (op->code() == lir_cond_float_branch) {
1097 bool is_unordered = (op->ublock() == op->block());
1098 // Assembler::EQ does not permit unordered branches, so we add
1099 // another branch here. Likewise, Assembler::NE does not permit
1100 // ordered branches.
1101 if ((is_unordered && op->cond() == lir_cond_equal)
1102 || (!is_unordered && op->cond() == lir_cond_notEqual))
1103 __ br(Assembler::VS, *(op->ublock()->label()));
1104 switch(op->cond()) {
1105 case lir_cond_equal: acond = Assembler::EQ; break;
1106 case lir_cond_notEqual: acond = Assembler::NE; break;
1107 case lir_cond_less: acond = (is_unordered ? Assembler::LT : Assembler::LO); break;
1108 case lir_cond_lessEqual: acond = (is_unordered ? Assembler::LE : Assembler::LS); break;
1109 case lir_cond_greaterEqual: acond = (is_unordered ? Assembler::HS : Assembler::GE); break;
1110 case lir_cond_greater: acond = (is_unordered ? Assembler::HI : Assembler::GT); break;
1111 default: ShouldNotReachHere();
1112 acond = Assembler::EQ; // unreachable
1113 }
1114 } else {
1115 switch (op->cond()) {
1116 case lir_cond_equal: acond = Assembler::EQ; break;
1117 case lir_cond_notEqual: acond = Assembler::NE; break;
1118 case lir_cond_less: acond = Assembler::LT; break;
1119 case lir_cond_lessEqual: acond = Assembler::LE; break;
1120 case lir_cond_greaterEqual: acond = Assembler::GE; break;
1121 case lir_cond_greater: acond = Assembler::GT; break;
1122 case lir_cond_belowEqual: acond = Assembler::LS; break;
1123 case lir_cond_aboveEqual: acond = Assembler::HS; break;
1124 default: ShouldNotReachHere();
1125 acond = Assembler::EQ; // unreachable
1126 }
1127 }
1128 __ br(acond,*(op->label()));
1129 }
1130 }
1131
1132
1133
1134 void LIR_Assembler::emit_opConvert(LIR_OpConvert* op) {
1135 LIR_Opr src = op->in_opr();
1136 LIR_Opr dest = op->result_opr();
1137
1138 switch (op->bytecode()) {
1139 case Bytecodes::_i2f:
1140 {
1141 __ scvtfws(dest->as_float_reg(), src->as_register());
1142 break;
1143 }
1144 case Bytecodes::_i2d:
1145 {
1146 __ scvtfwd(dest->as_double_reg(), src->as_register());
1147 break;
1148 }
1149 case Bytecodes::_l2d:
1150 {
1151 __ scvtfd(dest->as_double_reg(), src->as_register_lo());
1152 break;
1153 }
1154 case Bytecodes::_l2f:
1155 {
1156 __ scvtfs(dest->as_float_reg(), src->as_register_lo());
1157 break;
1158 }
1159 case Bytecodes::_f2d:
1160 {
1161 __ fcvts(dest->as_double_reg(), src->as_float_reg());
1162 break;
1163 }
1164 case Bytecodes::_d2f:
1165 {
1166 __ fcvtd(dest->as_float_reg(), src->as_double_reg());
1167 break;
1168 }
1169 case Bytecodes::_i2c:
1170 {
1171 __ ubfx(dest->as_register(), src->as_register(), 0, 16);
1172 break;
1173 }
1174 case Bytecodes::_i2l:
1175 {
1176 __ sxtw(dest->as_register_lo(), src->as_register());
1177 break;
1178 }
1179 case Bytecodes::_i2s:
1180 {
1181 __ sxth(dest->as_register(), src->as_register());
1182 break;
1183 }
1184 case Bytecodes::_i2b:
1185 {
1186 __ sxtb(dest->as_register(), src->as_register());
1187 break;
1188 }
1189 case Bytecodes::_l2i:
1190 {
1191 _masm->block_comment("FIXME: This could be a no-op");
1192 __ uxtw(dest->as_register(), src->as_register_lo());
1193 break;
1194 }
1195 case Bytecodes::_d2l:
1196 {
1197 __ fcvtzd(dest->as_register_lo(), src->as_double_reg());
1198 break;
1199 }
1200 case Bytecodes::_f2i:
1201 {
1202 __ fcvtzsw(dest->as_register(), src->as_float_reg());
1203 break;
1204 }
1205 case Bytecodes::_f2l:
1206 {
1207 __ fcvtzs(dest->as_register_lo(), src->as_float_reg());
1208 break;
1209 }
1210 case Bytecodes::_d2i:
1211 {
1212 __ fcvtzdw(dest->as_register(), src->as_double_reg());
1213 break;
1214 }
1215 default: ShouldNotReachHere();
1216 }
1217 }
1218
1219 void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) {
1220 if (op->init_check()) {
1221 __ ldrb(rscratch1, Address(op->klass()->as_register(),
1222 InstanceKlass::init_state_offset()));
1223 __ cmpw(rscratch1, InstanceKlass::fully_initialized);
1224 add_debug_info_for_null_check_here(op->stub()->info());
1225 __ br(Assembler::NE, *op->stub()->entry());
1226 }
1227 __ allocate_object(op->obj()->as_register(),
1228 op->tmp1()->as_register(),
1229 op->tmp2()->as_register(),
1230 op->header_size(),
1231 op->object_size(),
1232 op->klass()->as_register(),
1233 *op->stub()->entry());
1234 __ bind(*op->stub()->continuation());
1235 }
1236
1237 void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) {
1238 Register len = op->len()->as_register();
1239 __ uxtw(len, len);
1240
1241 if (UseSlowPath || op->is_null_free() ||
1242 (!UseFastNewObjectArray && is_reference_type(op->type())) ||
1243 (!UseFastNewTypeArray && !is_reference_type(op->type()))) {
1244 __ b(*op->stub()->entry());
1245 } else {
1246 Register tmp1 = op->tmp1()->as_register();
1247 Register tmp2 = op->tmp2()->as_register();
1248 Register tmp3 = op->tmp3()->as_register();
1249 if (len == tmp1) {
1250 tmp1 = tmp3;
1251 } else if (len == tmp2) {
1252 tmp2 = tmp3;
1253 } else if (len == tmp3) {
1254 // everything is ok
1255 } else {
1256 __ mov(tmp3, len);
1257 }
1258 __ allocate_array(op->obj()->as_register(),
1259 len,
1260 tmp1,
1261 tmp2,
1262 arrayOopDesc::base_offset_in_bytes(op->type()),
1263 array_element_size(op->type()),
1264 op->klass()->as_register(),
1265 *op->stub()->entry());
1266 }
1267 __ bind(*op->stub()->continuation());
1268 }
1269
1270 void LIR_Assembler::type_profile_helper(Register mdo,
1271 ciMethodData *md, ciProfileData *data,
1272 Register recv, Label* update_done) {
1273 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
1274 Label next_test;
1275 // See if the receiver is receiver[n].
1276 __ lea(rscratch2, Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i))));
1277 __ ldr(rscratch1, Address(rscratch2));
1278 __ cmp(recv, rscratch1);
1279 __ br(Assembler::NE, next_test);
1280 Address data_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i)));
1281 __ addptr(data_addr, DataLayout::counter_increment);
1282 __ b(*update_done);
1283 __ bind(next_test);
1284 }
1285
1286 // Didn't find receiver; find next empty slot and fill it in
1287 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
1288 Label next_test;
1289 __ lea(rscratch2,
1290 Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i))));
1291 Address recv_addr(rscratch2);
1292 __ ldr(rscratch1, recv_addr);
1293 __ cbnz(rscratch1, next_test);
1294 __ str(recv, recv_addr);
1295 __ mov(rscratch1, DataLayout::counter_increment);
1296 __ lea(rscratch2, Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))));
1297 __ str(rscratch1, Address(rscratch2));
1298 __ b(*update_done);
1299 __ bind(next_test);
1300 }
1301 }
1302
1303 void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, Label* failure, Label* obj_is_null) {
1304 // we always need a stub for the failure case.
1305 CodeStub* stub = op->stub();
1306 Register obj = op->object()->as_register();
1307 Register k_RInfo = op->tmp1()->as_register();
1308 Register klass_RInfo = op->tmp2()->as_register();
1309 Register dst = op->result_opr()->as_register();
1310 ciKlass* k = op->klass();
1311 Register Rtmp1 = noreg;
1312
1313 // check if it needs to be profiled
1314 ciMethodData* md;
1315 ciProfileData* data;
1316
1317 const bool should_profile = op->should_profile();
1318
1319 if (should_profile) {
1320 ciMethod* method = op->profiled_method();
1321 assert(method != nullptr, "Should have method");
1322 int bci = op->profiled_bci();
1323 md = method->method_data_or_null();
1324 assert(md != nullptr, "Sanity");
1325 data = md->bci_to_data(bci);
1326 assert(data != nullptr, "need data for type check");
1327 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
1328 }
1329 Label* success_target = success;
1330 Label* failure_target = failure;
1331
1332 if (obj == k_RInfo) {
1333 k_RInfo = dst;
1334 } else if (obj == klass_RInfo) {
1335 klass_RInfo = dst;
1336 }
1337 if (k->is_loaded() && !UseCompressedClassPointers) {
1338 select_different_registers(obj, dst, k_RInfo, klass_RInfo);
1339 } else {
1340 Rtmp1 = op->tmp3()->as_register();
1341 select_different_registers(obj, dst, k_RInfo, klass_RInfo, Rtmp1);
1342 }
1343
1344 assert_different_registers(obj, k_RInfo, klass_RInfo);
1345
1346 if (op->need_null_check()) {
1347 if (should_profile) {
1348 Register mdo = klass_RInfo;
1349 __ mov_metadata(mdo, md->constant_encoding());
1350 Label not_null;
1351 __ cbnz(obj, not_null);
1352 // Object is null; update MDO and exit
1353 Address data_addr
1354 = __ form_address(rscratch2, mdo,
1355 md->byte_offset_of_slot(data, DataLayout::flags_offset()),
1356 0);
1357 __ ldrb(rscratch1, data_addr);
1358 __ orr(rscratch1, rscratch1, BitData::null_seen_byte_constant());
1359 __ strb(rscratch1, data_addr);
1360 __ b(*obj_is_null);
1361 __ bind(not_null);
1362
1363 Label update_done;
1364 Register recv = k_RInfo;
1365 __ load_klass(recv, obj);
1366 type_profile_helper(mdo, md, data, recv, &update_done);
1367 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
1368 __ addptr(counter_addr, DataLayout::counter_increment);
1369
1370 __ bind(update_done);
1371 } else {
1372 __ cbz(obj, *obj_is_null);
1373 }
1374 }
1375
1376 if (!k->is_loaded()) {
1377 klass2reg_with_patching(k_RInfo, op->info_for_patch());
1378 } else {
1379 __ mov_metadata(k_RInfo, k->constant_encoding());
1380 }
1381 __ verify_oop(obj);
1382
1383 if (op->fast_check()) {
1384 // get object class
1385 // not a safepoint as obj null check happens earlier
1386 __ load_klass(rscratch1, obj);
1387 __ cmp( rscratch1, k_RInfo);
1388
1389 __ br(Assembler::NE, *failure_target);
1390 // successful cast, fall through to profile or jump
1391 } else {
1392 // get object class
1393 // not a safepoint as obj null check happens earlier
1394 __ load_klass(klass_RInfo, obj);
1395 if (k->is_loaded()) {
1396 // See if we get an immediate positive hit
1397 __ ldr(rscratch1, Address(klass_RInfo, int64_t(k->super_check_offset())));
1398 __ cmp(k_RInfo, rscratch1);
1399 if ((juint)in_bytes(Klass::secondary_super_cache_offset()) != k->super_check_offset()) {
1400 __ br(Assembler::NE, *failure_target);
1401 // successful cast, fall through to profile or jump
1402 } else {
1403 // See if we get an immediate positive hit
1404 __ br(Assembler::EQ, *success_target);
1405 // check for self
1406 __ cmp(klass_RInfo, k_RInfo);
1407 __ br(Assembler::EQ, *success_target);
1408
1409 __ stp(klass_RInfo, k_RInfo, Address(__ pre(sp, -2 * wordSize)));
1410 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1411 __ ldr(klass_RInfo, Address(__ post(sp, 2 * wordSize)));
1412 // result is a boolean
1413 __ cbzw(klass_RInfo, *failure_target);
1414 // successful cast, fall through to profile or jump
1415 }
1416 } else {
1417 // perform the fast part of the checking logic
1418 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, nullptr);
1419 // call out-of-line instance of __ check_klass_subtype_slow_path(...):
1420 __ stp(klass_RInfo, k_RInfo, Address(__ pre(sp, -2 * wordSize)));
1421 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1422 __ ldp(k_RInfo, klass_RInfo, Address(__ post(sp, 2 * wordSize)));
1423 // result is a boolean
1424 __ cbz(k_RInfo, *failure_target);
1425 // successful cast, fall through to profile or jump
1426 }
1427 }
1428 __ b(*success);
1429 }
1430
1431
1432 void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) {
1433 const bool should_profile = op->should_profile();
1434
1435 LIR_Code code = op->code();
1436 if (code == lir_store_check) {
1437 Register value = op->object()->as_register();
1438 Register array = op->array()->as_register();
1439 Register k_RInfo = op->tmp1()->as_register();
1440 Register klass_RInfo = op->tmp2()->as_register();
1441 Register Rtmp1 = op->tmp3()->as_register();
1442
1443 CodeStub* stub = op->stub();
1444
1445 // check if it needs to be profiled
1446 ciMethodData* md;
1447 ciProfileData* data;
1448
1449 if (should_profile) {
1450 ciMethod* method = op->profiled_method();
1451 assert(method != nullptr, "Should have method");
1452 int bci = op->profiled_bci();
1453 md = method->method_data_or_null();
1454 assert(md != nullptr, "Sanity");
1455 data = md->bci_to_data(bci);
1456 assert(data != nullptr, "need data for type check");
1457 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
1458 }
1459 Label done;
1460 Label* success_target = &done;
1461 Label* failure_target = stub->entry();
1462
1463 if (should_profile) {
1464 Label not_null;
1465 Register mdo = klass_RInfo;
1466 __ mov_metadata(mdo, md->constant_encoding());
1467 __ cbnz(value, not_null);
1468 // Object is null; update MDO and exit
1469 Address data_addr
1470 = __ form_address(rscratch2, mdo,
1471 md->byte_offset_of_slot(data, DataLayout::flags_offset()),
1472 0);
1473 __ ldrb(rscratch1, data_addr);
1474 __ orr(rscratch1, rscratch1, BitData::null_seen_byte_constant());
1475 __ strb(rscratch1, data_addr);
1476 __ b(done);
1477 __ bind(not_null);
1478
1479 Label update_done;
1480 Register recv = k_RInfo;
1481 __ load_klass(recv, value);
1482 type_profile_helper(mdo, md, data, recv, &update_done);
1483 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
1484 __ addptr(counter_addr, DataLayout::counter_increment);
1485 __ bind(update_done);
1486 } else {
1487 __ cbz(value, done);
1488 }
1489
1490 add_debug_info_for_null_check_here(op->info_for_exception());
1491 __ load_klass(k_RInfo, array);
1492 __ load_klass(klass_RInfo, value);
1493
1494 // get instance klass (it's already uncompressed)
1495 __ ldr(k_RInfo, Address(k_RInfo, ObjArrayKlass::element_klass_offset()));
1496 // perform the fast part of the checking logic
1497 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, nullptr);
1498 // call out-of-line instance of __ check_klass_subtype_slow_path(...):
1499 __ stp(klass_RInfo, k_RInfo, Address(__ pre(sp, -2 * wordSize)));
1500 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1501 __ ldp(k_RInfo, klass_RInfo, Address(__ post(sp, 2 * wordSize)));
1502 // result is a boolean
1503 __ cbzw(k_RInfo, *failure_target);
1504 // fall through to the success case
1505
1506 __ bind(done);
1507 } else if (code == lir_checkcast) {
1508 Register obj = op->object()->as_register();
1509 Register dst = op->result_opr()->as_register();
1510 Label success;
1511 emit_typecheck_helper(op, &success, op->stub()->entry(), &success);
1512 __ bind(success);
1513 if (dst != obj) {
1514 __ mov(dst, obj);
1515 }
1516 } else if (code == lir_instanceof) {
1517 Register obj = op->object()->as_register();
1518 Register dst = op->result_opr()->as_register();
1519 Label success, failure, done;
1520 emit_typecheck_helper(op, &success, &failure, &failure);
1521 __ bind(failure);
1522 __ mov(dst, zr);
1523 __ b(done);
1524 __ bind(success);
1525 __ mov(dst, 1);
1526 __ bind(done);
1527 } else {
1528 ShouldNotReachHere();
1529 }
1530 }
1531
1532 void LIR_Assembler::emit_opFlattenedArrayCheck(LIR_OpFlattenedArrayCheck* op) {
1533 // We are loading/storing from/to an array that *may* be a flat array (the
1534 // declared type is Object[], abstract[], interface[] or VT.ref[]).
1535 // If this array is a flat array, take the slow path.
1536 __ test_flat_array_oop(op->array()->as_register(), op->tmp()->as_register(), *op->stub()->entry());
1537 if (!op->value()->is_illegal()) {
1538 // The array is not a flat array, but it might be null-free. If we are storing
1539 // a null into a null-free array, take the slow path (which will throw NPE).
1540 Label skip;
1541 __ cbnz(op->value()->as_register(), skip);
1542 __ test_null_free_array_oop(op->array()->as_register(), op->tmp()->as_register(), *op->stub()->entry());
1543 __ bind(skip);
1544 }
1545 }
1546
1547 void LIR_Assembler::emit_opNullFreeArrayCheck(LIR_OpNullFreeArrayCheck* op) {
1548 // We are storing into an array that *may* be null-free (the declared type is
1549 // Object[], abstract[], interface[] or VT.ref[]).
1550 Label test_mark_word;
1551 Register tmp = op->tmp()->as_register();
1552 __ ldr(tmp, Address(op->array()->as_register(), oopDesc::mark_offset_in_bytes()));
1553 __ tst(tmp, markWord::unlocked_value);
1554 __ br(Assembler::NE, test_mark_word);
1555 __ load_prototype_header(tmp, op->array()->as_register());
1556 __ bind(test_mark_word);
1557 __ tst(tmp, markWord::null_free_array_bit_in_place);
1558 }
1559
1560 void LIR_Assembler::emit_opSubstitutabilityCheck(LIR_OpSubstitutabilityCheck* op) {
1561 Label L_oops_equal;
1562 Label L_oops_not_equal;
1563 Label L_end;
1564
1565 Register left = op->left()->as_register();
1566 Register right = op->right()->as_register();
1567
1568 __ cmp(left, right);
1569 __ br(Assembler::EQ, L_oops_equal);
1570
1571 // (1) Null check -- if one of the operands is null, the other must not be null (because
1572 // the two references are not equal), so they are not substitutable,
1573 // FIXME: do null check only if the operand is nullable
1574 {
1575 __ cbz(left, L_oops_not_equal);
1576 __ cbz(right, L_oops_not_equal);
1577 }
1578
1579 ciKlass* left_klass = op->left_klass();
1580 ciKlass* right_klass = op->right_klass();
1581
1582 // (2) Inline type check -- if either of the operands is not a inline type,
1583 // they are not substitutable. We do this only if we are not sure that the
1584 // operands are inline type
1585 if ((left_klass == nullptr || right_klass == nullptr) ||// The klass is still unloaded, or came from a Phi node.
1586 !left_klass->is_inlinetype() || !right_klass->is_inlinetype()) {
1587 Register tmp1 = op->tmp1()->as_register();
1588 __ mov(tmp1, markWord::inline_type_pattern);
1589 __ ldr(rscratch1, Address(left, oopDesc::mark_offset_in_bytes()));
1590 __ andr(tmp1, tmp1, rscratch1);
1591 __ ldr(rscratch1, Address(right, oopDesc::mark_offset_in_bytes()));
1592 __ andr(tmp1, tmp1, rscratch1);
1593 __ cmp(tmp1, (u1)markWord::inline_type_pattern);
1594 __ br(Assembler::NE, L_oops_not_equal);
1595 }
1596
1597 // (3) Same klass check: if the operands are of different klasses, they are not substitutable.
1598 if (left_klass != nullptr && left_klass->is_inlinetype() && left_klass == right_klass) {
1599 // No need to load klass -- the operands are statically known to be the same inline klass.
1600 __ b(*op->stub()->entry());
1601 } else {
1602 Register left_klass_op = op->left_klass_op()->as_register();
1603 Register right_klass_op = op->right_klass_op()->as_register();
1604
1605 if (UseCompressedClassPointers) {
1606 __ ldrw(left_klass_op, Address(left, oopDesc::klass_offset_in_bytes()));
1607 __ ldrw(right_klass_op, Address(right, oopDesc::klass_offset_in_bytes()));
1608 __ cmpw(left_klass_op, right_klass_op);
1609 } else {
1610 __ ldr(left_klass_op, Address(left, oopDesc::klass_offset_in_bytes()));
1611 __ ldr(right_klass_op, Address(right, oopDesc::klass_offset_in_bytes()));
1612 __ cmp(left_klass_op, right_klass_op);
1613 }
1614
1615 __ br(Assembler::EQ, *op->stub()->entry()); // same klass -> do slow check
1616 // fall through to L_oops_not_equal
1617 }
1618
1619 __ bind(L_oops_not_equal);
1620 move(op->not_equal_result(), op->result_opr());
1621 __ b(L_end);
1622
1623 __ bind(L_oops_equal);
1624 move(op->equal_result(), op->result_opr());
1625 __ b(L_end);
1626
1627 // We've returned from the stub. R0 contains 0x0 IFF the two
1628 // operands are not substitutable. (Don't compare against 0x1 in case the
1629 // C compiler is naughty)
1630 __ bind(*op->stub()->continuation());
1631 __ cbz(r0, L_oops_not_equal); // (call_stub() == 0x0) -> not_equal
1632 move(op->equal_result(), op->result_opr()); // (call_stub() != 0x0) -> equal
1633 // fall-through
1634 __ bind(L_end);
1635 }
1636
1637
1638 void LIR_Assembler::casw(Register addr, Register newval, Register cmpval) {
1639 __ cmpxchg(addr, cmpval, newval, Assembler::word, /* acquire*/ true, /* release*/ true, /* weak*/ false, rscratch1);
1640 __ cset(rscratch1, Assembler::NE);
1641 __ membar(__ AnyAny);
1642 }
1643
1644 void LIR_Assembler::casl(Register addr, Register newval, Register cmpval) {
1645 __ cmpxchg(addr, cmpval, newval, Assembler::xword, /* acquire*/ true, /* release*/ true, /* weak*/ false, rscratch1);
1646 __ cset(rscratch1, Assembler::NE);
1647 __ membar(__ AnyAny);
1648 }
1649
1650
1651 void LIR_Assembler::emit_compare_and_swap(LIR_OpCompareAndSwap* op) {
1652 Register addr;
1653 if (op->addr()->is_register()) {
1654 addr = as_reg(op->addr());
1655 } else {
1656 assert(op->addr()->is_address(), "what else?");
1657 LIR_Address* addr_ptr = op->addr()->as_address_ptr();
1658 assert(addr_ptr->disp() == 0, "need 0 disp");
1659 assert(addr_ptr->index() == LIR_Opr::illegalOpr(), "need 0 index");
1660 addr = as_reg(addr_ptr->base());
1661 }
1662 Register newval = as_reg(op->new_value());
1663 Register cmpval = as_reg(op->cmp_value());
1664
1665 if (op->code() == lir_cas_obj) {
1666 if (UseCompressedOops) {
1667 Register t1 = op->tmp1()->as_register();
1668 assert(op->tmp1()->is_valid(), "must be");
1669 __ encode_heap_oop(t1, cmpval);
1670 cmpval = t1;
1671 __ encode_heap_oop(rscratch2, newval);
1672 newval = rscratch2;
1673 casw(addr, newval, cmpval);
1674 } else {
1675 casl(addr, newval, cmpval);
1676 }
1677 } else if (op->code() == lir_cas_int) {
1678 casw(addr, newval, cmpval);
1679 } else {
1680 casl(addr, newval, cmpval);
1681 }
1682 }
1683
1684
1685 void LIR_Assembler::cmove(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, BasicType type,
1686 LIR_Opr cmp_opr1, LIR_Opr cmp_opr2) {
1687 assert(cmp_opr1 == LIR_OprFact::illegalOpr && cmp_opr2 == LIR_OprFact::illegalOpr, "unnecessary cmp oprs on aarch64");
1688
1689 Assembler::Condition acond, ncond;
1690 switch (condition) {
1691 case lir_cond_equal: acond = Assembler::EQ; ncond = Assembler::NE; break;
1692 case lir_cond_notEqual: acond = Assembler::NE; ncond = Assembler::EQ; break;
1693 case lir_cond_less: acond = Assembler::LT; ncond = Assembler::GE; break;
1694 case lir_cond_lessEqual: acond = Assembler::LE; ncond = Assembler::GT; break;
1695 case lir_cond_greaterEqual: acond = Assembler::GE; ncond = Assembler::LT; break;
1696 case lir_cond_greater: acond = Assembler::GT; ncond = Assembler::LE; break;
1697 case lir_cond_belowEqual:
1698 case lir_cond_aboveEqual:
1699 default: ShouldNotReachHere();
1700 acond = Assembler::EQ; ncond = Assembler::NE; // unreachable
1701 }
1702
1703 assert(result->is_single_cpu() || result->is_double_cpu(),
1704 "expect single register for result");
1705 if (opr1->is_constant() && opr2->is_constant()
1706 && opr1->type() == T_INT && opr2->type() == T_INT) {
1707 jint val1 = opr1->as_jint();
1708 jint val2 = opr2->as_jint();
1709 if (val1 == 0 && val2 == 1) {
1710 __ cset(result->as_register(), ncond);
1711 return;
1712 } else if (val1 == 1 && val2 == 0) {
1713 __ cset(result->as_register(), acond);
1714 return;
1715 }
1716 }
1717
1718 if (opr1->is_constant() && opr2->is_constant()
1719 && opr1->type() == T_LONG && opr2->type() == T_LONG) {
1720 jlong val1 = opr1->as_jlong();
1721 jlong val2 = opr2->as_jlong();
1722 if (val1 == 0 && val2 == 1) {
1723 __ cset(result->as_register_lo(), ncond);
1724 return;
1725 } else if (val1 == 1 && val2 == 0) {
1726 __ cset(result->as_register_lo(), acond);
1727 return;
1728 }
1729 }
1730
1731 if (opr1->is_stack()) {
1732 stack2reg(opr1, FrameMap::rscratch1_opr, result->type());
1733 opr1 = FrameMap::rscratch1_opr;
1734 } else if (opr1->is_constant()) {
1735 LIR_Opr tmp
1736 = opr1->type() == T_LONG ? FrameMap::rscratch1_long_opr : FrameMap::rscratch1_opr;
1737 const2reg(opr1, tmp, lir_patch_none, nullptr);
1738 opr1 = tmp;
1739 }
1740
1741 if (opr2->is_stack()) {
1742 stack2reg(opr2, FrameMap::rscratch2_opr, result->type());
1743 opr2 = FrameMap::rscratch2_opr;
1744 } else if (opr2->is_constant()) {
1745 LIR_Opr tmp
1746 = opr2->type() == T_LONG ? FrameMap::rscratch2_long_opr : FrameMap::rscratch2_opr;
1747 const2reg(opr2, tmp, lir_patch_none, nullptr);
1748 opr2 = tmp;
1749 }
1750
1751 if (result->type() == T_LONG)
1752 __ csel(result->as_register_lo(), opr1->as_register_lo(), opr2->as_register_lo(), acond);
1753 else
1754 __ csel(result->as_register(), opr1->as_register(), opr2->as_register(), acond);
1755 }
1756
1757 void LIR_Assembler::arith_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dest, CodeEmitInfo* info, bool pop_fpu_stack) {
1758 assert(info == nullptr, "should never be used, idiv/irem and ldiv/lrem not handled by this method");
1759
1760 if (left->is_single_cpu()) {
1761 Register lreg = left->as_register();
1762 Register dreg = as_reg(dest);
1763
1764 if (right->is_single_cpu()) {
1765 // cpu register - cpu register
1766
1767 assert(left->type() == T_INT && right->type() == T_INT && dest->type() == T_INT,
1768 "should be");
1769 Register rreg = right->as_register();
1770 switch (code) {
1771 case lir_add: __ addw (dest->as_register(), lreg, rreg); break;
1772 case lir_sub: __ subw (dest->as_register(), lreg, rreg); break;
1773 case lir_mul: __ mulw (dest->as_register(), lreg, rreg); break;
1774 default: ShouldNotReachHere();
1775 }
1776
1777 } else if (right->is_double_cpu()) {
1778 Register rreg = right->as_register_lo();
1779 // single_cpu + double_cpu: can happen with obj+long
1780 assert(code == lir_add || code == lir_sub, "mismatched arithmetic op");
1781 switch (code) {
1782 case lir_add: __ add(dreg, lreg, rreg); break;
1783 case lir_sub: __ sub(dreg, lreg, rreg); break;
1784 default: ShouldNotReachHere();
1785 }
1786 } else if (right->is_constant()) {
1787 // cpu register - constant
1788 jlong c;
1789
1790 // FIXME. This is fugly: we really need to factor all this logic.
1791 switch(right->type()) {
1792 case T_LONG:
1793 c = right->as_constant_ptr()->as_jlong();
1794 break;
1795 case T_INT:
1796 case T_ADDRESS:
1797 c = right->as_constant_ptr()->as_jint();
1798 break;
1799 default:
1800 ShouldNotReachHere();
1801 c = 0; // unreachable
1802 break;
1803 }
1804
1805 assert(code == lir_add || code == lir_sub, "mismatched arithmetic op");
1806 if (c == 0 && dreg == lreg) {
1807 COMMENT("effective nop elided");
1808 return;
1809 }
1810 switch(left->type()) {
1811 case T_INT:
1812 switch (code) {
1813 case lir_add: __ addw(dreg, lreg, c); break;
1814 case lir_sub: __ subw(dreg, lreg, c); break;
1815 default: ShouldNotReachHere();
1816 }
1817 break;
1818 case T_OBJECT:
1819 case T_ADDRESS:
1820 switch (code) {
1821 case lir_add: __ add(dreg, lreg, c); break;
1822 case lir_sub: __ sub(dreg, lreg, c); break;
1823 default: ShouldNotReachHere();
1824 }
1825 break;
1826 default:
1827 ShouldNotReachHere();
1828 }
1829 } else {
1830 ShouldNotReachHere();
1831 }
1832
1833 } else if (left->is_double_cpu()) {
1834 Register lreg_lo = left->as_register_lo();
1835
1836 if (right->is_double_cpu()) {
1837 // cpu register - cpu register
1838 Register rreg_lo = right->as_register_lo();
1839 switch (code) {
1840 case lir_add: __ add (dest->as_register_lo(), lreg_lo, rreg_lo); break;
1841 case lir_sub: __ sub (dest->as_register_lo(), lreg_lo, rreg_lo); break;
1842 case lir_mul: __ mul (dest->as_register_lo(), lreg_lo, rreg_lo); break;
1843 case lir_div: __ corrected_idivq(dest->as_register_lo(), lreg_lo, rreg_lo, false, rscratch1); break;
1844 case lir_rem: __ corrected_idivq(dest->as_register_lo(), lreg_lo, rreg_lo, true, rscratch1); break;
1845 default:
1846 ShouldNotReachHere();
1847 }
1848
1849 } else if (right->is_constant()) {
1850 jlong c = right->as_constant_ptr()->as_jlong();
1851 Register dreg = as_reg(dest);
1852 switch (code) {
1853 case lir_add:
1854 case lir_sub:
1855 if (c == 0 && dreg == lreg_lo) {
1856 COMMENT("effective nop elided");
1857 return;
1858 }
1859 code == lir_add ? __ add(dreg, lreg_lo, c) : __ sub(dreg, lreg_lo, c);
1860 break;
1861 case lir_div:
1862 assert(c > 0 && is_power_of_2(c), "divisor must be power-of-2 constant");
1863 if (c == 1) {
1864 // move lreg_lo to dreg if divisor is 1
1865 __ mov(dreg, lreg_lo);
1866 } else {
1867 unsigned int shift = log2i_exact(c);
1868 // use rscratch1 as intermediate result register
1869 __ asr(rscratch1, lreg_lo, 63);
1870 __ add(rscratch1, lreg_lo, rscratch1, Assembler::LSR, 64 - shift);
1871 __ asr(dreg, rscratch1, shift);
1872 }
1873 break;
1874 case lir_rem:
1875 assert(c > 0 && is_power_of_2(c), "divisor must be power-of-2 constant");
1876 if (c == 1) {
1877 // move 0 to dreg if divisor is 1
1878 __ mov(dreg, zr);
1879 } else {
1880 // use rscratch1 as intermediate result register
1881 __ negs(rscratch1, lreg_lo);
1882 __ andr(dreg, lreg_lo, c - 1);
1883 __ andr(rscratch1, rscratch1, c - 1);
1884 __ csneg(dreg, dreg, rscratch1, Assembler::MI);
1885 }
1886 break;
1887 default:
1888 ShouldNotReachHere();
1889 }
1890 } else {
1891 ShouldNotReachHere();
1892 }
1893 } else if (left->is_single_fpu()) {
1894 assert(right->is_single_fpu(), "right hand side of float arithmetics needs to be float register");
1895 switch (code) {
1896 case lir_add: __ fadds (dest->as_float_reg(), left->as_float_reg(), right->as_float_reg()); break;
1897 case lir_sub: __ fsubs (dest->as_float_reg(), left->as_float_reg(), right->as_float_reg()); break;
1898 case lir_mul: __ fmuls (dest->as_float_reg(), left->as_float_reg(), right->as_float_reg()); break;
1899 case lir_div: __ fdivs (dest->as_float_reg(), left->as_float_reg(), right->as_float_reg()); break;
1900 default:
1901 ShouldNotReachHere();
1902 }
1903 } else if (left->is_double_fpu()) {
1904 if (right->is_double_fpu()) {
1905 // fpu register - fpu register
1906 switch (code) {
1907 case lir_add: __ faddd (dest->as_double_reg(), left->as_double_reg(), right->as_double_reg()); break;
1908 case lir_sub: __ fsubd (dest->as_double_reg(), left->as_double_reg(), right->as_double_reg()); break;
1909 case lir_mul: __ fmuld (dest->as_double_reg(), left->as_double_reg(), right->as_double_reg()); break;
1910 case lir_div: __ fdivd (dest->as_double_reg(), left->as_double_reg(), right->as_double_reg()); break;
1911 default:
1912 ShouldNotReachHere();
1913 }
1914 } else {
1915 if (right->is_constant()) {
1916 ShouldNotReachHere();
1917 }
1918 ShouldNotReachHere();
1919 }
1920 } else if (left->is_single_stack() || left->is_address()) {
1921 assert(left == dest, "left and dest must be equal");
1922 ShouldNotReachHere();
1923 } else {
1924 ShouldNotReachHere();
1925 }
1926 }
1927
1928 void LIR_Assembler::arith_fpu_implementation(LIR_Code code, int left_index, int right_index, int dest_index, bool pop_fpu_stack) { Unimplemented(); }
1929
1930
1931 void LIR_Assembler::intrinsic_op(LIR_Code code, LIR_Opr value, LIR_Opr tmp, LIR_Opr dest, LIR_Op* op) {
1932 switch(code) {
1933 case lir_abs : __ fabsd(dest->as_double_reg(), value->as_double_reg()); break;
1934 case lir_sqrt: __ fsqrtd(dest->as_double_reg(), value->as_double_reg()); break;
1935 case lir_f2hf: __ flt_to_flt16(dest->as_register(), value->as_float_reg(), tmp->as_float_reg()); break;
1936 case lir_hf2f: __ flt16_to_flt(dest->as_float_reg(), value->as_register(), tmp->as_float_reg()); break;
1937 default : ShouldNotReachHere();
1938 }
1939 }
1940
1941 void LIR_Assembler::logic_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst) {
1942
1943 assert(left->is_single_cpu() || left->is_double_cpu(), "expect single or double register");
1944 Register Rleft = left->is_single_cpu() ? left->as_register() :
1945 left->as_register_lo();
1946 if (dst->is_single_cpu()) {
1947 Register Rdst = dst->as_register();
1948 if (right->is_constant()) {
1949 switch (code) {
1950 case lir_logic_and: __ andw (Rdst, Rleft, right->as_jint()); break;
1951 case lir_logic_or: __ orrw (Rdst, Rleft, right->as_jint()); break;
1952 case lir_logic_xor: __ eorw (Rdst, Rleft, right->as_jint()); break;
1953 default: ShouldNotReachHere(); break;
1954 }
1955 } else {
1956 Register Rright = right->is_single_cpu() ? right->as_register() :
1957 right->as_register_lo();
1958 switch (code) {
1959 case lir_logic_and: __ andw (Rdst, Rleft, Rright); break;
1960 case lir_logic_or: __ orrw (Rdst, Rleft, Rright); break;
1961 case lir_logic_xor: __ eorw (Rdst, Rleft, Rright); break;
1962 default: ShouldNotReachHere(); break;
1963 }
1964 }
1965 } else {
1966 Register Rdst = dst->as_register_lo();
1967 if (right->is_constant()) {
1968 switch (code) {
1969 case lir_logic_and: __ andr (Rdst, Rleft, right->as_jlong()); break;
1970 case lir_logic_or: __ orr (Rdst, Rleft, right->as_jlong()); break;
1971 case lir_logic_xor: __ eor (Rdst, Rleft, right->as_jlong()); break;
1972 default: ShouldNotReachHere(); break;
1973 }
1974 } else {
1975 Register Rright = right->is_single_cpu() ? right->as_register() :
1976 right->as_register_lo();
1977 switch (code) {
1978 case lir_logic_and: __ andr (Rdst, Rleft, Rright); break;
1979 case lir_logic_or: __ orr (Rdst, Rleft, Rright); break;
1980 case lir_logic_xor: __ eor (Rdst, Rleft, Rright); break;
1981 default: ShouldNotReachHere(); break;
1982 }
1983 }
1984 }
1985 }
1986
1987
1988
1989 void LIR_Assembler::arithmetic_idiv(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr illegal, LIR_Opr result, CodeEmitInfo* info) {
1990
1991 // opcode check
1992 assert((code == lir_idiv) || (code == lir_irem), "opcode must be idiv or irem");
1993 bool is_irem = (code == lir_irem);
1994
1995 // operand check
1996 assert(left->is_single_cpu(), "left must be register");
1997 assert(right->is_single_cpu() || right->is_constant(), "right must be register or constant");
1998 assert(result->is_single_cpu(), "result must be register");
1999 Register lreg = left->as_register();
2000 Register dreg = result->as_register();
2001
2002 // power-of-2 constant check and codegen
2003 if (right->is_constant()) {
2004 int c = right->as_constant_ptr()->as_jint();
2005 assert(c > 0 && is_power_of_2(c), "divisor must be power-of-2 constant");
2006 if (is_irem) {
2007 if (c == 1) {
2008 // move 0 to dreg if divisor is 1
2009 __ movw(dreg, zr);
2010 } else {
2011 // use rscratch1 as intermediate result register
2012 __ negsw(rscratch1, lreg);
2013 __ andw(dreg, lreg, c - 1);
2014 __ andw(rscratch1, rscratch1, c - 1);
2015 __ csnegw(dreg, dreg, rscratch1, Assembler::MI);
2016 }
2017 } else {
2018 if (c == 1) {
2019 // move lreg to dreg if divisor is 1
2020 __ movw(dreg, lreg);
2021 } else {
2022 unsigned int shift = exact_log2(c);
2023 // use rscratch1 as intermediate result register
2024 __ asrw(rscratch1, lreg, 31);
2025 __ addw(rscratch1, lreg, rscratch1, Assembler::LSR, 32 - shift);
2026 __ asrw(dreg, rscratch1, shift);
2027 }
2028 }
2029 } else {
2030 Register rreg = right->as_register();
2031 __ corrected_idivl(dreg, lreg, rreg, is_irem, rscratch1);
2032 }
2033 }
2034
2035
2036 void LIR_Assembler::comp_op(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Op2* op) {
2037 if (opr1->is_constant() && opr2->is_single_cpu()) {
2038 // tableswitch
2039 Register reg = as_reg(opr2);
2040 struct tableswitch &table = switches[opr1->as_constant_ptr()->as_jint()];
2041 __ tableswitch(reg, table._first_key, table._last_key, table._branches, table._after);
2042 } else if (opr1->is_single_cpu() || opr1->is_double_cpu()) {
2043 Register reg1 = as_reg(opr1);
2044 if (opr2->is_single_cpu()) {
2045 // cpu register - cpu register
2046 Register reg2 = opr2->as_register();
2047 if (is_reference_type(opr1->type())) {
2048 __ cmpoop(reg1, reg2);
2049 } else {
2050 assert(!is_reference_type(opr2->type()), "cmp int, oop?");
2051 __ cmpw(reg1, reg2);
2052 }
2053 return;
2054 }
2055 if (opr2->is_double_cpu()) {
2056 // cpu register - cpu register
2057 Register reg2 = opr2->as_register_lo();
2058 __ cmp(reg1, reg2);
2059 return;
2060 }
2061
2062 if (opr2->is_constant()) {
2063 bool is_32bit = false; // width of register operand
2064 jlong imm;
2065
2066 switch(opr2->type()) {
2067 case T_INT:
2068 imm = opr2->as_constant_ptr()->as_jint();
2069 is_32bit = true;
2070 break;
2071 case T_LONG:
2072 imm = opr2->as_constant_ptr()->as_jlong();
2073 break;
2074 case T_ADDRESS:
2075 imm = opr2->as_constant_ptr()->as_jint();
2076 break;
2077 case T_METADATA:
2078 imm = (intptr_t)(opr2->as_constant_ptr()->as_metadata());
2079 break;
2080 case T_OBJECT:
2081 case T_ARRAY:
2082 jobject2reg(opr2->as_constant_ptr()->as_jobject(), rscratch1);
2083 __ cmpoop(reg1, rscratch1);
2084 return;
2085 default:
2086 ShouldNotReachHere();
2087 imm = 0; // unreachable
2088 break;
2089 }
2090
2091 if (Assembler::operand_valid_for_add_sub_immediate(imm)) {
2092 if (is_32bit)
2093 __ cmpw(reg1, imm);
2094 else
2095 __ subs(zr, reg1, imm);
2096 return;
2097 } else {
2098 __ mov(rscratch1, imm);
2099 if (is_32bit)
2100 __ cmpw(reg1, rscratch1);
2101 else
2102 __ cmp(reg1, rscratch1);
2103 return;
2104 }
2105 } else
2106 ShouldNotReachHere();
2107 } else if (opr1->is_single_fpu()) {
2108 FloatRegister reg1 = opr1->as_float_reg();
2109 assert(opr2->is_single_fpu(), "expect single float register");
2110 FloatRegister reg2 = opr2->as_float_reg();
2111 __ fcmps(reg1, reg2);
2112 } else if (opr1->is_double_fpu()) {
2113 FloatRegister reg1 = opr1->as_double_reg();
2114 assert(opr2->is_double_fpu(), "expect double float register");
2115 FloatRegister reg2 = opr2->as_double_reg();
2116 __ fcmpd(reg1, reg2);
2117 } else {
2118 ShouldNotReachHere();
2119 }
2120 }
2121
2122 void LIR_Assembler::comp_fl2i(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst, LIR_Op2* op){
2123 if (code == lir_cmp_fd2i || code == lir_ucmp_fd2i) {
2124 bool is_unordered_less = (code == lir_ucmp_fd2i);
2125 if (left->is_single_fpu()) {
2126 __ float_cmp(true, is_unordered_less ? -1 : 1, left->as_float_reg(), right->as_float_reg(), dst->as_register());
2127 } else if (left->is_double_fpu()) {
2128 __ float_cmp(false, is_unordered_less ? -1 : 1, left->as_double_reg(), right->as_double_reg(), dst->as_register());
2129 } else {
2130 ShouldNotReachHere();
2131 }
2132 } else if (code == lir_cmp_l2i) {
2133 Label done;
2134 __ cmp(left->as_register_lo(), right->as_register_lo());
2135 __ mov(dst->as_register(), (uint64_t)-1L);
2136 __ br(Assembler::LT, done);
2137 __ csinc(dst->as_register(), zr, zr, Assembler::EQ);
2138 __ bind(done);
2139 } else {
2140 ShouldNotReachHere();
2141 }
2142 }
2143
2144
2145 void LIR_Assembler::align_call(LIR_Code code) { }
2146
2147
2148 void LIR_Assembler::call(LIR_OpJavaCall* op, relocInfo::relocType rtype) {
2149 address call = __ trampoline_call(Address(op->addr(), rtype));
2150 if (call == nullptr) {
2151 bailout("trampoline stub overflow");
2152 return;
2153 }
2154 add_call_info(code_offset(), op->info(), op->maybe_return_as_fields());
2155 __ post_call_nop();
2156 }
2157
2158
2159 void LIR_Assembler::ic_call(LIR_OpJavaCall* op) {
2160 address call = __ ic_call(op->addr());
2161 if (call == nullptr) {
2162 bailout("trampoline stub overflow");
2163 return;
2164 }
2165 add_call_info(code_offset(), op->info(), op->maybe_return_as_fields());
2166 __ post_call_nop();
2167 }
2168
2169 void LIR_Assembler::emit_static_call_stub() {
2170 address call_pc = __ pc();
2171 address stub = __ start_a_stub(call_stub_size());
2172 if (stub == nullptr) {
2173 bailout("static call stub overflow");
2174 return;
2175 }
2176
2177 int start = __ offset();
2178
2179 __ relocate(static_stub_Relocation::spec(call_pc));
2180 __ emit_static_call_stub();
2181
2182 assert(__ offset() - start + CompiledDirectCall::to_trampoline_stub_size()
2183 <= call_stub_size(), "stub too big");
2184 __ end_a_stub();
2185 }
2186
2187
2188 void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) {
2189 assert(exceptionOop->as_register() == r0, "must match");
2190 assert(exceptionPC->as_register() == r3, "must match");
2191
2192 // exception object is not added to oop map by LinearScan
2193 // (LinearScan assumes that no oops are in fixed registers)
2194 info->add_register_oop(exceptionOop);
2195 Runtime1::StubID unwind_id;
2196
2197 // get current pc information
2198 // pc is only needed if the method has an exception handler, the unwind code does not need it.
2199 if (compilation()->debug_info_recorder()->last_pc_offset() == __ offset()) {
2200 // As no instructions have been generated yet for this LIR node it's
2201 // possible that an oop map already exists for the current offset.
2202 // In that case insert an dummy NOP here to ensure all oop map PCs
2203 // are unique. See JDK-8237483.
2204 __ nop();
2205 }
2206 int pc_for_athrow_offset = __ offset();
2207 InternalAddress pc_for_athrow(__ pc());
2208 __ adr(exceptionPC->as_register(), pc_for_athrow);
2209 add_call_info(pc_for_athrow_offset, info); // for exception handler
2210
2211 __ verify_not_null_oop(r0);
2212 // search an exception handler (r0: exception oop, r3: throwing pc)
2213 if (compilation()->has_fpu_code()) {
2214 unwind_id = Runtime1::handle_exception_id;
2215 } else {
2216 unwind_id = Runtime1::handle_exception_nofpu_id;
2217 }
2218 __ far_call(RuntimeAddress(Runtime1::entry_for(unwind_id)));
2219
2220 // FIXME: enough room for two byte trap ????
2221 __ nop();
2222 }
2223
2224
2225 void LIR_Assembler::unwind_op(LIR_Opr exceptionOop) {
2226 assert(exceptionOop->as_register() == r0, "must match");
2227
2228 __ b(_unwind_handler_entry);
2229 }
2230
2231
2232 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, LIR_Opr count, LIR_Opr dest, LIR_Opr tmp) {
2233 Register lreg = left->is_single_cpu() ? left->as_register() : left->as_register_lo();
2234 Register dreg = dest->is_single_cpu() ? dest->as_register() : dest->as_register_lo();
2235
2236 switch (left->type()) {
2237 case T_INT: {
2238 switch (code) {
2239 case lir_shl: __ lslvw (dreg, lreg, count->as_register()); break;
2240 case lir_shr: __ asrvw (dreg, lreg, count->as_register()); break;
2241 case lir_ushr: __ lsrvw (dreg, lreg, count->as_register()); break;
2242 default:
2243 ShouldNotReachHere();
2244 break;
2245 }
2246 break;
2247 case T_LONG:
2248 case T_ADDRESS:
2249 case T_OBJECT:
2250 switch (code) {
2251 case lir_shl: __ lslv (dreg, lreg, count->as_register()); break;
2252 case lir_shr: __ asrv (dreg, lreg, count->as_register()); break;
2253 case lir_ushr: __ lsrv (dreg, lreg, count->as_register()); break;
2254 default:
2255 ShouldNotReachHere();
2256 break;
2257 }
2258 break;
2259 default:
2260 ShouldNotReachHere();
2261 break;
2262 }
2263 }
2264 }
2265
2266
2267 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, jint count, LIR_Opr dest) {
2268 Register dreg = dest->is_single_cpu() ? dest->as_register() : dest->as_register_lo();
2269 Register lreg = left->is_single_cpu() ? left->as_register() : left->as_register_lo();
2270
2271 switch (left->type()) {
2272 case T_INT: {
2273 switch (code) {
2274 case lir_shl: __ lslw (dreg, lreg, count); break;
2275 case lir_shr: __ asrw (dreg, lreg, count); break;
2276 case lir_ushr: __ lsrw (dreg, lreg, count); break;
2277 default:
2278 ShouldNotReachHere();
2279 break;
2280 }
2281 break;
2282 case T_LONG:
2283 case T_ADDRESS:
2284 case T_OBJECT:
2285 switch (code) {
2286 case lir_shl: __ lsl (dreg, lreg, count); break;
2287 case lir_shr: __ asr (dreg, lreg, count); break;
2288 case lir_ushr: __ lsr (dreg, lreg, count); break;
2289 default:
2290 ShouldNotReachHere();
2291 break;
2292 }
2293 break;
2294 default:
2295 ShouldNotReachHere();
2296 break;
2297 }
2298 }
2299 }
2300
2301
2302 void LIR_Assembler::store_parameter(Register r, int offset_from_rsp_in_words) {
2303 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
2304 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
2305 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
2306 __ str (r, Address(sp, offset_from_rsp_in_bytes));
2307 }
2308
2309
2310 void LIR_Assembler::store_parameter(jint c, int offset_from_rsp_in_words) {
2311 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
2312 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
2313 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
2314 __ mov (rscratch1, c);
2315 __ str (rscratch1, Address(sp, offset_from_rsp_in_bytes));
2316 }
2317
2318
2319 void LIR_Assembler::store_parameter(jobject o, int offset_from_rsp_in_words) {
2320 ShouldNotReachHere();
2321 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
2322 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
2323 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
2324 __ lea(rscratch1, __ constant_oop_address(o));
2325 __ str(rscratch1, Address(sp, offset_from_rsp_in_bytes));
2326 }
2327
2328 void LIR_Assembler::arraycopy_inlinetype_check(Register obj, Register tmp, CodeStub* slow_path, bool is_dest, bool null_check) {
2329 if (null_check) {
2330 __ cbz(obj, *slow_path->entry());
2331 }
2332 if (is_dest) {
2333 __ test_null_free_array_oop(obj, tmp, *slow_path->entry());
2334 } else {
2335 __ test_flat_array_oop(obj, tmp, *slow_path->entry());
2336 }
2337 }
2338
2339 // This code replaces a call to arraycopy; no exception may
2340 // be thrown in this code, they must be thrown in the System.arraycopy
2341 // activation frame; we could save some checks if this would not be the case
2342 void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) {
2343 ciArrayKlass* default_type = op->expected_type();
2344 Register src = op->src()->as_register();
2345 Register dst = op->dst()->as_register();
2346 Register src_pos = op->src_pos()->as_register();
2347 Register dst_pos = op->dst_pos()->as_register();
2348 Register length = op->length()->as_register();
2349 Register tmp = op->tmp()->as_register();
2350
2351 CodeStub* stub = op->stub();
2352 int flags = op->flags();
2353 BasicType basic_type = default_type != nullptr ? default_type->element_type()->basic_type() : T_ILLEGAL;
2354 if (is_reference_type(basic_type)) basic_type = T_OBJECT;
2355
2356 if (flags & LIR_OpArrayCopy::always_slow_path) {
2357 __ b(*stub->entry());
2358 __ bind(*stub->continuation());
2359 return;
2360 }
2361
2362 // if we don't know anything, just go through the generic arraycopy
2363 if (default_type == nullptr // || basic_type == T_OBJECT
2364 ) {
2365 Label done;
2366 assert(src == r1 && src_pos == r2, "mismatch in calling convention");
2367
2368 // Save the arguments in case the generic arraycopy fails and we
2369 // have to fall back to the JNI stub
2370 __ stp(dst, dst_pos, Address(sp, 0*BytesPerWord));
2371 __ stp(length, src_pos, Address(sp, 2*BytesPerWord));
2372 __ str(src, Address(sp, 4*BytesPerWord));
2373
2374 address copyfunc_addr = StubRoutines::generic_arraycopy();
2375 assert(copyfunc_addr != nullptr, "generic arraycopy stub required");
2376
2377 // The arguments are in java calling convention so we shift them
2378 // to C convention
2379 assert_different_registers(c_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4);
2380 __ mov(c_rarg0, j_rarg0);
2381 assert_different_registers(c_rarg1, j_rarg2, j_rarg3, j_rarg4);
2382 __ mov(c_rarg1, j_rarg1);
2383 assert_different_registers(c_rarg2, j_rarg3, j_rarg4);
2384 __ mov(c_rarg2, j_rarg2);
2385 assert_different_registers(c_rarg3, j_rarg4);
2386 __ mov(c_rarg3, j_rarg3);
2387 __ mov(c_rarg4, j_rarg4);
2388 #ifndef PRODUCT
2389 if (PrintC1Statistics) {
2390 __ incrementw(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt));
2391 }
2392 #endif
2393 __ far_call(RuntimeAddress(copyfunc_addr));
2394
2395 __ cbz(r0, *stub->continuation());
2396
2397 // Reload values from the stack so they are where the stub
2398 // expects them.
2399 __ ldp(dst, dst_pos, Address(sp, 0*BytesPerWord));
2400 __ ldp(length, src_pos, Address(sp, 2*BytesPerWord));
2401 __ ldr(src, Address(sp, 4*BytesPerWord));
2402
2403 // r0 is -1^K where K == partial copied count
2404 __ eonw(rscratch1, r0, zr);
2405 // adjust length down and src/end pos up by partial copied count
2406 __ subw(length, length, rscratch1);
2407 __ addw(src_pos, src_pos, rscratch1);
2408 __ addw(dst_pos, dst_pos, rscratch1);
2409 __ b(*stub->entry());
2410
2411 __ bind(*stub->continuation());
2412 return;
2413 }
2414
2415 // Handle inline type arrays
2416 if (flags & LIR_OpArrayCopy::src_inlinetype_check) {
2417 arraycopy_inlinetype_check(src, tmp, stub, false, (flags & LIR_OpArrayCopy::src_null_check));
2418 }
2419
2420 if (flags & LIR_OpArrayCopy::dst_inlinetype_check) {
2421 arraycopy_inlinetype_check(dst, tmp, stub, true, (flags & LIR_OpArrayCopy::dst_null_check));
2422 }
2423
2424 assert(default_type != nullptr && default_type->is_array_klass() && default_type->is_loaded(), "must be true at this point");
2425
2426 int elem_size = type2aelembytes(basic_type);
2427 int scale = exact_log2(elem_size);
2428
2429 Address src_length_addr = Address(src, arrayOopDesc::length_offset_in_bytes());
2430 Address dst_length_addr = Address(dst, arrayOopDesc::length_offset_in_bytes());
2431 Address src_klass_addr = Address(src, oopDesc::klass_offset_in_bytes());
2432 Address dst_klass_addr = Address(dst, oopDesc::klass_offset_in_bytes());
2433
2434 // test for null
2435 if (flags & LIR_OpArrayCopy::src_null_check) {
2436 __ cbz(src, *stub->entry());
2437 }
2438 if (flags & LIR_OpArrayCopy::dst_null_check) {
2439 __ cbz(dst, *stub->entry());
2440 }
2441
2442 // If the compiler was not able to prove that exact type of the source or the destination
2443 // of the arraycopy is an array type, check at runtime if the source or the destination is
2444 // an instance type.
2445 if (flags & LIR_OpArrayCopy::type_check) {
2446 if (!(flags & LIR_OpArrayCopy::LIR_OpArrayCopy::dst_objarray)) {
2447 __ load_klass(tmp, dst);
2448 __ ldrw(rscratch1, Address(tmp, in_bytes(Klass::layout_helper_offset())));
2449 __ cmpw(rscratch1, Klass::_lh_neutral_value);
2450 __ br(Assembler::GE, *stub->entry());
2451 }
2452
2453 if (!(flags & LIR_OpArrayCopy::LIR_OpArrayCopy::src_objarray)) {
2454 __ load_klass(tmp, src);
2455 __ ldrw(rscratch1, Address(tmp, in_bytes(Klass::layout_helper_offset())));
2456 __ cmpw(rscratch1, Klass::_lh_neutral_value);
2457 __ br(Assembler::GE, *stub->entry());
2458 }
2459 }
2460
2461 // check if negative
2462 if (flags & LIR_OpArrayCopy::src_pos_positive_check) {
2463 __ cmpw(src_pos, 0);
2464 __ br(Assembler::LT, *stub->entry());
2465 }
2466 if (flags & LIR_OpArrayCopy::dst_pos_positive_check) {
2467 __ cmpw(dst_pos, 0);
2468 __ br(Assembler::LT, *stub->entry());
2469 }
2470
2471 if (flags & LIR_OpArrayCopy::length_positive_check) {
2472 __ cmpw(length, 0);
2473 __ br(Assembler::LT, *stub->entry());
2474 }
2475
2476 if (flags & LIR_OpArrayCopy::src_range_check) {
2477 __ addw(tmp, src_pos, length);
2478 __ ldrw(rscratch1, src_length_addr);
2479 __ cmpw(tmp, rscratch1);
2480 __ br(Assembler::HI, *stub->entry());
2481 }
2482 if (flags & LIR_OpArrayCopy::dst_range_check) {
2483 __ addw(tmp, dst_pos, length);
2484 __ ldrw(rscratch1, dst_length_addr);
2485 __ cmpw(tmp, rscratch1);
2486 __ br(Assembler::HI, *stub->entry());
2487 }
2488
2489 if (flags & LIR_OpArrayCopy::type_check) {
2490 // We don't know the array types are compatible
2491 if (basic_type != T_OBJECT) {
2492 // Simple test for basic type arrays
2493 if (UseCompressedClassPointers) {
2494 __ ldrw(tmp, src_klass_addr);
2495 __ ldrw(rscratch1, dst_klass_addr);
2496 __ cmpw(tmp, rscratch1);
2497 } else {
2498 __ ldr(tmp, src_klass_addr);
2499 __ ldr(rscratch1, dst_klass_addr);
2500 __ cmp(tmp, rscratch1);
2501 }
2502 __ br(Assembler::NE, *stub->entry());
2503 } else {
2504 // For object arrays, if src is a sub class of dst then we can
2505 // safely do the copy.
2506 Label cont, slow;
2507
2508 #define PUSH(r1, r2) \
2509 stp(r1, r2, __ pre(sp, -2 * wordSize));
2510
2511 #define POP(r1, r2) \
2512 ldp(r1, r2, __ post(sp, 2 * wordSize));
2513
2514 __ PUSH(src, dst);
2515
2516 __ load_klass(src, src);
2517 __ load_klass(dst, dst);
2518
2519 __ check_klass_subtype_fast_path(src, dst, tmp, &cont, &slow, nullptr);
2520
2521 __ PUSH(src, dst);
2522 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
2523 __ POP(src, dst);
2524
2525 __ cbnz(src, cont);
2526
2527 __ bind(slow);
2528 __ POP(src, dst);
2529
2530 address copyfunc_addr = StubRoutines::checkcast_arraycopy();
2531 if (copyfunc_addr != nullptr) { // use stub if available
2532 // src is not a sub class of dst so we have to do a
2533 // per-element check.
2534
2535 int mask = LIR_OpArrayCopy::src_objarray|LIR_OpArrayCopy::dst_objarray;
2536 if ((flags & mask) != mask) {
2537 // Check that at least both of them object arrays.
2538 assert(flags & mask, "one of the two should be known to be an object array");
2539
2540 if (!(flags & LIR_OpArrayCopy::src_objarray)) {
2541 __ load_klass(tmp, src);
2542 } else if (!(flags & LIR_OpArrayCopy::dst_objarray)) {
2543 __ load_klass(tmp, dst);
2544 }
2545 int lh_offset = in_bytes(Klass::layout_helper_offset());
2546 Address klass_lh_addr(tmp, lh_offset);
2547 jint objArray_lh = Klass::array_layout_helper(T_OBJECT);
2548 __ ldrw(rscratch1, klass_lh_addr);
2549 __ mov(rscratch2, objArray_lh);
2550 __ eorw(rscratch1, rscratch1, rscratch2);
2551 __ cbnzw(rscratch1, *stub->entry());
2552 }
2553
2554 // Spill because stubs can use any register they like and it's
2555 // easier to restore just those that we care about.
2556 __ stp(dst, dst_pos, Address(sp, 0*BytesPerWord));
2557 __ stp(length, src_pos, Address(sp, 2*BytesPerWord));
2558 __ str(src, Address(sp, 4*BytesPerWord));
2559
2560 __ lea(c_rarg0, Address(src, src_pos, Address::uxtw(scale)));
2561 __ add(c_rarg0, c_rarg0, arrayOopDesc::base_offset_in_bytes(basic_type));
2562 assert_different_registers(c_rarg0, dst, dst_pos, length);
2563 __ lea(c_rarg1, Address(dst, dst_pos, Address::uxtw(scale)));
2564 __ add(c_rarg1, c_rarg1, arrayOopDesc::base_offset_in_bytes(basic_type));
2565 assert_different_registers(c_rarg1, dst, length);
2566 __ uxtw(c_rarg2, length);
2567 assert_different_registers(c_rarg2, dst);
2568
2569 __ load_klass(c_rarg4, dst);
2570 __ ldr(c_rarg4, Address(c_rarg4, ObjArrayKlass::element_klass_offset()));
2571 __ ldrw(c_rarg3, Address(c_rarg4, Klass::super_check_offset_offset()));
2572 __ far_call(RuntimeAddress(copyfunc_addr));
2573
2574 #ifndef PRODUCT
2575 if (PrintC1Statistics) {
2576 Label failed;
2577 __ cbnz(r0, failed);
2578 __ incrementw(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_cnt));
2579 __ bind(failed);
2580 }
2581 #endif
2582
2583 __ cbz(r0, *stub->continuation());
2584
2585 #ifndef PRODUCT
2586 if (PrintC1Statistics) {
2587 __ incrementw(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_attempt_cnt));
2588 }
2589 #endif
2590 assert_different_registers(dst, dst_pos, length, src_pos, src, r0, rscratch1);
2591
2592 // Restore previously spilled arguments
2593 __ ldp(dst, dst_pos, Address(sp, 0*BytesPerWord));
2594 __ ldp(length, src_pos, Address(sp, 2*BytesPerWord));
2595 __ ldr(src, Address(sp, 4*BytesPerWord));
2596
2597 // return value is -1^K where K is partial copied count
2598 __ eonw(rscratch1, r0, zr);
2599 // adjust length down and src/end pos up by partial copied count
2600 __ subw(length, length, rscratch1);
2601 __ addw(src_pos, src_pos, rscratch1);
2602 __ addw(dst_pos, dst_pos, rscratch1);
2603 }
2604
2605 __ b(*stub->entry());
2606
2607 __ bind(cont);
2608 __ POP(src, dst);
2609 }
2610 }
2611
2612 #ifdef ASSERT
2613 if (basic_type != T_OBJECT || !(flags & LIR_OpArrayCopy::type_check)) {
2614 // Sanity check the known type with the incoming class. For the
2615 // primitive case the types must match exactly with src.klass and
2616 // dst.klass each exactly matching the default type. For the
2617 // object array case, if no type check is needed then either the
2618 // dst type is exactly the expected type and the src type is a
2619 // subtype which we can't check or src is the same array as dst
2620 // but not necessarily exactly of type default_type.
2621 Label known_ok, halt;
2622 __ mov_metadata(tmp, default_type->constant_encoding());
2623 if (UseCompressedClassPointers) {
2624 __ encode_klass_not_null(tmp);
2625 }
2626
2627 if (basic_type != T_OBJECT) {
2628
2629 if (UseCompressedClassPointers) {
2630 __ ldrw(rscratch1, dst_klass_addr);
2631 __ cmpw(tmp, rscratch1);
2632 } else {
2633 __ ldr(rscratch1, dst_klass_addr);
2634 __ cmp(tmp, rscratch1);
2635 }
2636 __ br(Assembler::NE, halt);
2637 if (UseCompressedClassPointers) {
2638 __ ldrw(rscratch1, src_klass_addr);
2639 __ cmpw(tmp, rscratch1);
2640 } else {
2641 __ ldr(rscratch1, src_klass_addr);
2642 __ cmp(tmp, rscratch1);
2643 }
2644 __ br(Assembler::EQ, known_ok);
2645 } else {
2646 if (UseCompressedClassPointers) {
2647 __ ldrw(rscratch1, dst_klass_addr);
2648 __ cmpw(tmp, rscratch1);
2649 } else {
2650 __ ldr(rscratch1, dst_klass_addr);
2651 __ cmp(tmp, rscratch1);
2652 }
2653 __ br(Assembler::EQ, known_ok);
2654 __ cmp(src, dst);
2655 __ br(Assembler::EQ, known_ok);
2656 }
2657 __ bind(halt);
2658 __ stop("incorrect type information in arraycopy");
2659 __ bind(known_ok);
2660 }
2661 #endif
2662
2663 #ifndef PRODUCT
2664 if (PrintC1Statistics) {
2665 __ incrementw(ExternalAddress(Runtime1::arraycopy_count_address(basic_type)));
2666 }
2667 #endif
2668
2669 __ lea(c_rarg0, Address(src, src_pos, Address::uxtw(scale)));
2670 __ add(c_rarg0, c_rarg0, arrayOopDesc::base_offset_in_bytes(basic_type));
2671 assert_different_registers(c_rarg0, dst, dst_pos, length);
2672 __ lea(c_rarg1, Address(dst, dst_pos, Address::uxtw(scale)));
2673 __ add(c_rarg1, c_rarg1, arrayOopDesc::base_offset_in_bytes(basic_type));
2674 assert_different_registers(c_rarg1, dst, length);
2675 __ uxtw(c_rarg2, length);
2676 assert_different_registers(c_rarg2, dst);
2677
2678 bool disjoint = (flags & LIR_OpArrayCopy::overlapping) == 0;
2679 bool aligned = (flags & LIR_OpArrayCopy::unaligned) == 0;
2680 const char *name;
2681 address entry = StubRoutines::select_arraycopy_function(basic_type, aligned, disjoint, name, false);
2682
2683 CodeBlob *cb = CodeCache::find_blob(entry);
2684 if (cb) {
2685 __ far_call(RuntimeAddress(entry));
2686 } else {
2687 __ call_VM_leaf(entry, 3);
2688 }
2689
2690 __ bind(*stub->continuation());
2691 }
2692
2693
2694
2695
2696 void LIR_Assembler::emit_lock(LIR_OpLock* op) {
2697 Register obj = op->obj_opr()->as_register(); // may not be an oop
2698 Register hdr = op->hdr_opr()->as_register();
2699 Register lock = op->lock_opr()->as_register();
2700 Register temp = op->scratch_opr()->as_register();
2701 if (LockingMode == LM_MONITOR) {
2702 if (op->info() != nullptr) {
2703 add_debug_info_for_null_check_here(op->info());
2704 __ null_check(obj, -1);
2705 }
2706 __ b(*op->stub()->entry());
2707 } else if (op->code() == lir_lock) {
2708 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
2709 // add debug info for NullPointerException only if one is possible
2710 int null_check_offset = __ lock_object(hdr, obj, lock, temp, *op->stub()->entry());
2711 if (op->info() != nullptr) {
2712 add_debug_info_for_null_check(null_check_offset, op->info());
2713 }
2714 // done
2715 } else if (op->code() == lir_unlock) {
2716 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
2717 __ unlock_object(hdr, obj, lock, temp, *op->stub()->entry());
2718 } else {
2719 Unimplemented();
2720 }
2721 __ bind(*op->stub()->continuation());
2722 }
2723
2724 void LIR_Assembler::emit_load_klass(LIR_OpLoadKlass* op) {
2725 Register obj = op->obj()->as_pointer_register();
2726 Register result = op->result_opr()->as_pointer_register();
2727
2728 CodeEmitInfo* info = op->info();
2729 if (info != nullptr) {
2730 add_debug_info_for_null_check_here(info);
2731 }
2732
2733 if (UseCompressedClassPointers) {
2734 __ ldrw(result, Address (obj, oopDesc::klass_offset_in_bytes()));
2735 __ decode_klass_not_null(result);
2736 } else {
2737 __ ldr(result, Address (obj, oopDesc::klass_offset_in_bytes()));
2738 }
2739 }
2740
2741 void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) {
2742 ciMethod* method = op->profiled_method();
2743 int bci = op->profiled_bci();
2744 ciMethod* callee = op->profiled_callee();
2745
2746 // Update counter for all call types
2747 ciMethodData* md = method->method_data_or_null();
2748 assert(md != nullptr, "Sanity");
2749 ciProfileData* data = md->bci_to_data(bci);
2750 assert(data != nullptr && data->is_CounterData(), "need CounterData for calls");
2751 assert(op->mdo()->is_single_cpu(), "mdo must be allocated");
2752 Register mdo = op->mdo()->as_register();
2753 __ mov_metadata(mdo, md->constant_encoding());
2754 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
2755 // Perform additional virtual call profiling for invokevirtual and
2756 // invokeinterface bytecodes
2757 if (op->should_profile_receiver_type()) {
2758 assert(op->recv()->is_single_cpu(), "recv must be allocated");
2759 Register recv = op->recv()->as_register();
2760 assert_different_registers(mdo, recv);
2761 assert(data->is_VirtualCallData(), "need VirtualCallData for virtual calls");
2762 ciKlass* known_klass = op->known_holder();
2763 if (C1OptimizeVirtualCallProfiling && known_klass != nullptr) {
2764 // We know the type that will be seen at this call site; we can
2765 // statically update the MethodData* rather than needing to do
2766 // dynamic tests on the receiver type
2767
2768 // NOTE: we should probably put a lock around this search to
2769 // avoid collisions by concurrent compilations
2770 ciVirtualCallData* vc_data = (ciVirtualCallData*) data;
2771 uint i;
2772 for (i = 0; i < VirtualCallData::row_limit(); i++) {
2773 ciKlass* receiver = vc_data->receiver(i);
2774 if (known_klass->equals(receiver)) {
2775 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
2776 __ addptr(data_addr, DataLayout::counter_increment);
2777 return;
2778 }
2779 }
2780
2781 // Receiver type not found in profile data; select an empty slot
2782
2783 // Note that this is less efficient than it should be because it
2784 // always does a write to the receiver part of the
2785 // VirtualCallData rather than just the first time
2786 for (i = 0; i < VirtualCallData::row_limit(); i++) {
2787 ciKlass* receiver = vc_data->receiver(i);
2788 if (receiver == nullptr) {
2789 Address recv_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_offset(i)));
2790 __ mov_metadata(rscratch1, known_klass->constant_encoding());
2791 __ lea(rscratch2, recv_addr);
2792 __ str(rscratch1, Address(rscratch2));
2793 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
2794 __ addptr(data_addr, DataLayout::counter_increment);
2795 return;
2796 }
2797 }
2798 } else {
2799 __ load_klass(recv, recv);
2800 Label update_done;
2801 type_profile_helper(mdo, md, data, recv, &update_done);
2802 // Receiver did not match any saved receiver and there is no empty row for it.
2803 // Increment total counter to indicate polymorphic case.
2804 __ addptr(counter_addr, DataLayout::counter_increment);
2805
2806 __ bind(update_done);
2807 }
2808 } else {
2809 // Static call
2810 __ addptr(counter_addr, DataLayout::counter_increment);
2811 }
2812 }
2813
2814
2815 void LIR_Assembler::emit_delay(LIR_OpDelay*) {
2816 Unimplemented();
2817 }
2818
2819
2820 void LIR_Assembler::monitor_address(int monitor_no, LIR_Opr dst) {
2821 __ lea(dst->as_register(), frame_map()->address_for_monitor_lock(monitor_no));
2822 }
2823
2824 void LIR_Assembler::emit_updatecrc32(LIR_OpUpdateCRC32* op) {
2825 assert(op->crc()->is_single_cpu(), "crc must be register");
2826 assert(op->val()->is_single_cpu(), "byte value must be register");
2827 assert(op->result_opr()->is_single_cpu(), "result must be register");
2828 Register crc = op->crc()->as_register();
2829 Register val = op->val()->as_register();
2830 Register res = op->result_opr()->as_register();
2831
2832 assert_different_registers(val, crc, res);
2833 uint64_t offset;
2834 __ adrp(res, ExternalAddress(StubRoutines::crc_table_addr()), offset);
2835 __ add(res, res, offset);
2836
2837 __ mvnw(crc, crc); // ~crc
2838 __ update_byte_crc32(crc, val, res);
2839 __ mvnw(res, crc); // ~crc
2840 }
2841
2842 void LIR_Assembler::emit_profile_type(LIR_OpProfileType* op) {
2843 COMMENT("emit_profile_type {");
2844 Register obj = op->obj()->as_register();
2845 Register tmp = op->tmp()->as_pointer_register();
2846 Address mdo_addr = as_Address(op->mdp()->as_address_ptr());
2847 ciKlass* exact_klass = op->exact_klass();
2848 intptr_t current_klass = op->current_klass();
2849 bool not_null = op->not_null();
2850 bool no_conflict = op->no_conflict();
2851
2852 Label update, next, none;
2853
2854 bool do_null = !not_null;
2855 bool exact_klass_set = exact_klass != nullptr && ciTypeEntries::valid_ciklass(current_klass) == exact_klass;
2856 bool do_update = !TypeEntries::is_type_unknown(current_klass) && !exact_klass_set;
2857
2858 assert(do_null || do_update, "why are we here?");
2859 assert(!TypeEntries::was_null_seen(current_klass) || do_update, "why are we here?");
2860 assert(mdo_addr.base() != rscratch1, "wrong register");
2861
2862 __ verify_oop(obj);
2863
2864 if (tmp != obj) {
2865 assert_different_registers(obj, tmp, rscratch1, rscratch2, mdo_addr.base(), mdo_addr.index());
2866 __ mov(tmp, obj);
2867 } else {
2868 assert_different_registers(obj, rscratch1, rscratch2, mdo_addr.base(), mdo_addr.index());
2869 }
2870 if (do_null) {
2871 __ cbnz(tmp, update);
2872 if (!TypeEntries::was_null_seen(current_klass)) {
2873 __ ldr(rscratch2, mdo_addr);
2874 __ orr(rscratch2, rscratch2, TypeEntries::null_seen);
2875 __ str(rscratch2, mdo_addr);
2876 }
2877 if (do_update) {
2878 #ifndef ASSERT
2879 __ b(next);
2880 }
2881 #else
2882 __ b(next);
2883 }
2884 } else {
2885 __ cbnz(tmp, update);
2886 __ stop("unexpected null obj");
2887 #endif
2888 }
2889
2890 __ bind(update);
2891
2892 if (do_update) {
2893 #ifdef ASSERT
2894 if (exact_klass != nullptr) {
2895 Label ok;
2896 __ load_klass(tmp, tmp);
2897 __ mov_metadata(rscratch1, exact_klass->constant_encoding());
2898 __ eor(rscratch1, tmp, rscratch1);
2899 __ cbz(rscratch1, ok);
2900 __ stop("exact klass and actual klass differ");
2901 __ bind(ok);
2902 }
2903 #endif
2904 if (!no_conflict) {
2905 if (exact_klass == nullptr || TypeEntries::is_type_none(current_klass)) {
2906 if (exact_klass != nullptr) {
2907 __ mov_metadata(tmp, exact_klass->constant_encoding());
2908 } else {
2909 __ load_klass(tmp, tmp);
2910 }
2911
2912 __ ldr(rscratch2, mdo_addr);
2913 __ eor(tmp, tmp, rscratch2);
2914 __ andr(rscratch1, tmp, TypeEntries::type_klass_mask);
2915 // klass seen before, nothing to do. The unknown bit may have been
2916 // set already but no need to check.
2917 __ cbz(rscratch1, next);
2918
2919 __ tbnz(tmp, exact_log2(TypeEntries::type_unknown), next); // already unknown. Nothing to do anymore.
2920
2921 if (TypeEntries::is_type_none(current_klass)) {
2922 __ cbz(rscratch2, none);
2923 __ cmp(rscratch2, (u1)TypeEntries::null_seen);
2924 __ br(Assembler::EQ, none);
2925 // There is a chance that the checks above
2926 // fail if another thread has just set the
2927 // profiling to this obj's klass
2928 __ dmb(Assembler::ISHLD);
2929 __ eor(tmp, tmp, rscratch2); // get back original value before XOR
2930 __ ldr(rscratch2, mdo_addr);
2931 __ eor(tmp, tmp, rscratch2);
2932 __ andr(rscratch1, tmp, TypeEntries::type_klass_mask);
2933 __ cbz(rscratch1, next);
2934 }
2935 } else {
2936 assert(ciTypeEntries::valid_ciklass(current_klass) != nullptr &&
2937 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "conflict only");
2938
2939 __ ldr(tmp, mdo_addr);
2940 __ tbnz(tmp, exact_log2(TypeEntries::type_unknown), next); // already unknown. Nothing to do anymore.
2941 }
2942
2943 // different than before. Cannot keep accurate profile.
2944 __ ldr(rscratch2, mdo_addr);
2945 __ orr(rscratch2, rscratch2, TypeEntries::type_unknown);
2946 __ str(rscratch2, mdo_addr);
2947
2948 if (TypeEntries::is_type_none(current_klass)) {
2949 __ b(next);
2950
2951 __ bind(none);
2952 // first time here. Set profile type.
2953 __ str(tmp, mdo_addr);
2954 #ifdef ASSERT
2955 __ andr(tmp, tmp, TypeEntries::type_mask);
2956 __ verify_klass_ptr(tmp);
2957 #endif
2958 }
2959 } else {
2960 // There's a single possible klass at this profile point
2961 assert(exact_klass != nullptr, "should be");
2962 if (TypeEntries::is_type_none(current_klass)) {
2963 __ mov_metadata(tmp, exact_klass->constant_encoding());
2964 __ ldr(rscratch2, mdo_addr);
2965 __ eor(tmp, tmp, rscratch2);
2966 __ andr(rscratch1, tmp, TypeEntries::type_klass_mask);
2967 __ cbz(rscratch1, next);
2968 #ifdef ASSERT
2969 {
2970 Label ok;
2971 __ ldr(rscratch1, mdo_addr);
2972 __ cbz(rscratch1, ok);
2973 __ cmp(rscratch1, (u1)TypeEntries::null_seen);
2974 __ br(Assembler::EQ, ok);
2975 // may have been set by another thread
2976 __ dmb(Assembler::ISHLD);
2977 __ mov_metadata(rscratch1, exact_klass->constant_encoding());
2978 __ ldr(rscratch2, mdo_addr);
2979 __ eor(rscratch2, rscratch1, rscratch2);
2980 __ andr(rscratch2, rscratch2, TypeEntries::type_mask);
2981 __ cbz(rscratch2, ok);
2982
2983 __ stop("unexpected profiling mismatch");
2984 __ bind(ok);
2985 }
2986 #endif
2987 // first time here. Set profile type.
2988 __ str(tmp, mdo_addr);
2989 #ifdef ASSERT
2990 __ andr(tmp, tmp, TypeEntries::type_mask);
2991 __ verify_klass_ptr(tmp);
2992 #endif
2993 } else {
2994 assert(ciTypeEntries::valid_ciklass(current_klass) != nullptr &&
2995 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "inconsistent");
2996
2997 __ ldr(tmp, mdo_addr);
2998 __ tbnz(tmp, exact_log2(TypeEntries::type_unknown), next); // already unknown. Nothing to do anymore.
2999
3000 __ orr(tmp, tmp, TypeEntries::type_unknown);
3001 __ str(tmp, mdo_addr);
3002 // FIXME: Write barrier needed here?
3003 }
3004 }
3005
3006 __ bind(next);
3007 }
3008 COMMENT("} emit_profile_type");
3009 }
3010
3011 void LIR_Assembler::emit_profile_inline_type(LIR_OpProfileInlineType* op) {
3012 Register obj = op->obj()->as_register();
3013 Register tmp = op->tmp()->as_pointer_register();
3014 bool not_null = op->not_null();
3015 int flag = op->flag();
3016
3017 Label not_inline_type;
3018 if (!not_null) {
3019 __ cbz(obj, not_inline_type);
3020 }
3021
3022 __ test_oop_is_not_inline_type(obj, tmp, not_inline_type);
3023
3024 Address mdo_addr = as_Address(op->mdp()->as_address_ptr(), rscratch2);
3025 __ ldrb(rscratch1, mdo_addr);
3026 __ orr(rscratch1, rscratch1, flag);
3027 __ strb(rscratch1, mdo_addr);
3028
3029 __ bind(not_inline_type);
3030 }
3031
3032 void LIR_Assembler::align_backward_branch_target() {
3033 }
3034
3035
3036 void LIR_Assembler::negate(LIR_Opr left, LIR_Opr dest, LIR_Opr tmp) {
3037 // tmp must be unused
3038 assert(tmp->is_illegal(), "wasting a register if tmp is allocated");
3039
3040 if (left->is_single_cpu()) {
3041 assert(dest->is_single_cpu(), "expect single result reg");
3042 __ negw(dest->as_register(), left->as_register());
3043 } else if (left->is_double_cpu()) {
3044 assert(dest->is_double_cpu(), "expect double result reg");
3045 __ neg(dest->as_register_lo(), left->as_register_lo());
3046 } else if (left->is_single_fpu()) {
3047 assert(dest->is_single_fpu(), "expect single float result reg");
3048 __ fnegs(dest->as_float_reg(), left->as_float_reg());
3049 } else {
3050 assert(left->is_double_fpu(), "expect double float operand reg");
3051 assert(dest->is_double_fpu(), "expect double float result reg");
3052 __ fnegd(dest->as_double_reg(), left->as_double_reg());
3053 }
3054 }
3055
3056
3057 void LIR_Assembler::leal(LIR_Opr addr, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) {
3058 if (patch_code != lir_patch_none) {
3059 deoptimize_trap(info);
3060 return;
3061 }
3062
3063 __ lea(dest->as_register_lo(), as_Address(addr->as_address_ptr()));
3064 }
3065
3066
3067 void LIR_Assembler::rt_call(LIR_Opr result, address dest, const LIR_OprList* args, LIR_Opr tmp, CodeEmitInfo* info) {
3068 assert(!tmp->is_valid(), "don't need temporary");
3069
3070 CodeBlob *cb = CodeCache::find_blob(dest);
3071 if (cb) {
3072 __ far_call(RuntimeAddress(dest));
3073 } else {
3074 __ mov(rscratch1, RuntimeAddress(dest));
3075 __ blr(rscratch1);
3076 }
3077
3078 if (info != nullptr) {
3079 add_call_info_here(info);
3080 }
3081 __ post_call_nop();
3082 }
3083
3084 void LIR_Assembler::volatile_move_op(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info) {
3085 if (dest->is_address() || src->is_address()) {
3086 move_op(src, dest, type, lir_patch_none, info,
3087 /*pop_fpu_stack*/false, /*wide*/false);
3088 } else {
3089 ShouldNotReachHere();
3090 }
3091 }
3092
3093 #ifdef ASSERT
3094 // emit run-time assertion
3095 void LIR_Assembler::emit_assert(LIR_OpAssert* op) {
3096 assert(op->code() == lir_assert, "must be");
3097
3098 if (op->in_opr1()->is_valid()) {
3099 assert(op->in_opr2()->is_valid(), "both operands must be valid");
3100 comp_op(op->condition(), op->in_opr1(), op->in_opr2(), op);
3101 } else {
3102 assert(op->in_opr2()->is_illegal(), "both operands must be illegal");
3103 assert(op->condition() == lir_cond_always, "no other conditions allowed");
3104 }
3105
3106 Label ok;
3107 if (op->condition() != lir_cond_always) {
3108 Assembler::Condition acond = Assembler::AL;
3109 switch (op->condition()) {
3110 case lir_cond_equal: acond = Assembler::EQ; break;
3111 case lir_cond_notEqual: acond = Assembler::NE; break;
3112 case lir_cond_less: acond = Assembler::LT; break;
3113 case lir_cond_lessEqual: acond = Assembler::LE; break;
3114 case lir_cond_greaterEqual: acond = Assembler::GE; break;
3115 case lir_cond_greater: acond = Assembler::GT; break;
3116 case lir_cond_belowEqual: acond = Assembler::LS; break;
3117 case lir_cond_aboveEqual: acond = Assembler::HS; break;
3118 default: ShouldNotReachHere();
3119 }
3120 __ br(acond, ok);
3121 }
3122 if (op->halt()) {
3123 const char* str = __ code_string(op->msg());
3124 __ stop(str);
3125 } else {
3126 breakpoint();
3127 }
3128 __ bind(ok);
3129 }
3130 #endif
3131
3132 #ifndef PRODUCT
3133 #define COMMENT(x) do { __ block_comment(x); } while (0)
3134 #else
3135 #define COMMENT(x)
3136 #endif
3137
3138 void LIR_Assembler::membar() {
3139 COMMENT("membar");
3140 __ membar(MacroAssembler::AnyAny);
3141 }
3142
3143 void LIR_Assembler::membar_acquire() {
3144 __ membar(Assembler::LoadLoad|Assembler::LoadStore);
3145 }
3146
3147 void LIR_Assembler::membar_release() {
3148 __ membar(Assembler::LoadStore|Assembler::StoreStore);
3149 }
3150
3151 void LIR_Assembler::membar_loadload() {
3152 __ membar(Assembler::LoadLoad);
3153 }
3154
3155 void LIR_Assembler::membar_storestore() {
3156 __ membar(MacroAssembler::StoreStore);
3157 }
3158
3159 void LIR_Assembler::membar_loadstore() { __ membar(MacroAssembler::LoadStore); }
3160
3161 void LIR_Assembler::membar_storeload() { __ membar(MacroAssembler::StoreLoad); }
3162
3163 void LIR_Assembler::on_spin_wait() {
3164 __ spin_wait();
3165 }
3166
3167 void LIR_Assembler::get_thread(LIR_Opr result_reg) {
3168 __ mov(result_reg->as_register(), rthread);
3169 }
3170
3171 void LIR_Assembler::check_orig_pc() {
3172 __ ldr(rscratch2, frame_map()->address_for_orig_pc_addr());
3173 __ cmp(rscratch2, (u1)NULL_WORD);
3174 }
3175
3176 void LIR_Assembler::peephole(LIR_List *lir) {
3177 #if 0
3178 if (tableswitch_count >= max_tableswitches)
3179 return;
3180
3181 /*
3182 This finite-state automaton recognizes sequences of compare-and-
3183 branch instructions. We will turn them into a tableswitch. You
3184 could argue that C1 really shouldn't be doing this sort of
3185 optimization, but without it the code is really horrible.
3186 */
3187
3188 enum { start_s, cmp1_s, beq_s, cmp_s } state;
3189 int first_key, last_key = -2147483648;
3190 int next_key = 0;
3191 int start_insn = -1;
3192 int last_insn = -1;
3193 Register reg = noreg;
3194 LIR_Opr reg_opr;
3195 state = start_s;
3196
3197 LIR_OpList* inst = lir->instructions_list();
3198 for (int i = 0; i < inst->length(); i++) {
3199 LIR_Op* op = inst->at(i);
3200 switch (state) {
3201 case start_s:
3202 first_key = -1;
3203 start_insn = i;
3204 switch (op->code()) {
3205 case lir_cmp:
3206 LIR_Opr opr1 = op->as_Op2()->in_opr1();
3207 LIR_Opr opr2 = op->as_Op2()->in_opr2();
3208 if (opr1->is_cpu_register() && opr1->is_single_cpu()
3209 && opr2->is_constant()
3210 && opr2->type() == T_INT) {
3211 reg_opr = opr1;
3212 reg = opr1->as_register();
3213 first_key = opr2->as_constant_ptr()->as_jint();
3214 next_key = first_key + 1;
3215 state = cmp_s;
3216 goto next_state;
3217 }
3218 break;
3219 }
3220 break;
3221 case cmp_s:
3222 switch (op->code()) {
3223 case lir_branch:
3224 if (op->as_OpBranch()->cond() == lir_cond_equal) {
3225 state = beq_s;
3226 last_insn = i;
3227 goto next_state;
3228 }
3229 }
3230 state = start_s;
3231 break;
3232 case beq_s:
3233 switch (op->code()) {
3234 case lir_cmp: {
3235 LIR_Opr opr1 = op->as_Op2()->in_opr1();
3236 LIR_Opr opr2 = op->as_Op2()->in_opr2();
3237 if (opr1->is_cpu_register() && opr1->is_single_cpu()
3238 && opr1->as_register() == reg
3239 && opr2->is_constant()
3240 && opr2->type() == T_INT
3241 && opr2->as_constant_ptr()->as_jint() == next_key) {
3242 last_key = next_key;
3243 next_key++;
3244 state = cmp_s;
3245 goto next_state;
3246 }
3247 }
3248 }
3249 last_key = next_key;
3250 state = start_s;
3251 break;
3252 default:
3253 assert(false, "impossible state");
3254 }
3255 if (state == start_s) {
3256 if (first_key < last_key - 5L && reg != noreg) {
3257 {
3258 // printf("found run register %d starting at insn %d low value %d high value %d\n",
3259 // reg->encoding(),
3260 // start_insn, first_key, last_key);
3261 // for (int i = 0; i < inst->length(); i++) {
3262 // inst->at(i)->print();
3263 // tty->print("\n");
3264 // }
3265 // tty->print("\n");
3266 }
3267
3268 struct tableswitch *sw = &switches[tableswitch_count];
3269 sw->_insn_index = start_insn, sw->_first_key = first_key,
3270 sw->_last_key = last_key, sw->_reg = reg;
3271 inst->insert_before(last_insn + 1, new LIR_OpLabel(&sw->_after));
3272 {
3273 // Insert the new table of branches
3274 int offset = last_insn;
3275 for (int n = first_key; n < last_key; n++) {
3276 inst->insert_before
3277 (last_insn + 1,
3278 new LIR_OpBranch(lir_cond_always, T_ILLEGAL,
3279 inst->at(offset)->as_OpBranch()->label()));
3280 offset -= 2, i++;
3281 }
3282 }
3283 // Delete all the old compare-and-branch instructions
3284 for (int n = first_key; n < last_key; n++) {
3285 inst->remove_at(start_insn);
3286 inst->remove_at(start_insn);
3287 }
3288 // Insert the tableswitch instruction
3289 inst->insert_before(start_insn,
3290 new LIR_Op2(lir_cmp, lir_cond_always,
3291 LIR_OprFact::intConst(tableswitch_count),
3292 reg_opr));
3293 inst->insert_before(start_insn + 1, new LIR_OpLabel(&sw->_branches));
3294 tableswitch_count++;
3295 }
3296 reg = noreg;
3297 last_key = -2147483648;
3298 }
3299 next_state:
3300 ;
3301 }
3302 #endif
3303 }
3304
3305 void LIR_Assembler::atomic_op(LIR_Code code, LIR_Opr src, LIR_Opr data, LIR_Opr dest, LIR_Opr tmp_op) {
3306 Address addr = as_Address(src->as_address_ptr());
3307 BasicType type = src->type();
3308 bool is_oop = is_reference_type(type);
3309
3310 void (MacroAssembler::* add)(Register prev, RegisterOrConstant incr, Register addr);
3311 void (MacroAssembler::* xchg)(Register prev, Register newv, Register addr);
3312
3313 switch(type) {
3314 case T_INT:
3315 xchg = &MacroAssembler::atomic_xchgalw;
3316 add = &MacroAssembler::atomic_addalw;
3317 break;
3318 case T_LONG:
3319 xchg = &MacroAssembler::atomic_xchgal;
3320 add = &MacroAssembler::atomic_addal;
3321 break;
3322 case T_OBJECT:
3323 case T_ARRAY:
3324 if (UseCompressedOops) {
3325 xchg = &MacroAssembler::atomic_xchgalw;
3326 add = &MacroAssembler::atomic_addalw;
3327 } else {
3328 xchg = &MacroAssembler::atomic_xchgal;
3329 add = &MacroAssembler::atomic_addal;
3330 }
3331 break;
3332 default:
3333 ShouldNotReachHere();
3334 xchg = &MacroAssembler::atomic_xchgal;
3335 add = &MacroAssembler::atomic_addal; // unreachable
3336 }
3337
3338 switch (code) {
3339 case lir_xadd:
3340 {
3341 RegisterOrConstant inc;
3342 Register tmp = as_reg(tmp_op);
3343 Register dst = as_reg(dest);
3344 if (data->is_constant()) {
3345 inc = RegisterOrConstant(as_long(data));
3346 assert_different_registers(dst, addr.base(), tmp,
3347 rscratch1, rscratch2);
3348 } else {
3349 inc = RegisterOrConstant(as_reg(data));
3350 assert_different_registers(inc.as_register(), dst, addr.base(), tmp,
3351 rscratch1, rscratch2);
3352 }
3353 __ lea(tmp, addr);
3354 (_masm->*add)(dst, inc, tmp);
3355 break;
3356 }
3357 case lir_xchg:
3358 {
3359 Register tmp = tmp_op->as_register();
3360 Register obj = as_reg(data);
3361 Register dst = as_reg(dest);
3362 if (is_oop && UseCompressedOops) {
3363 __ encode_heap_oop(rscratch2, obj);
3364 obj = rscratch2;
3365 }
3366 assert_different_registers(obj, addr.base(), tmp, rscratch1);
3367 assert_different_registers(dst, addr.base(), tmp, rscratch1);
3368 __ lea(tmp, addr);
3369 (_masm->*xchg)(dst, obj, tmp);
3370 if (is_oop && UseCompressedOops) {
3371 __ decode_heap_oop(dst);
3372 }
3373 }
3374 break;
3375 default:
3376 ShouldNotReachHere();
3377 }
3378 __ membar(__ AnyAny);
3379 }
3380
3381 #undef __