1 /*
2 * Copyright (c) 2000, 2023, 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/ciInstance.hpp"
37 #include "code/compiledIC.hpp"
38 #include "gc/shared/collectedHeap.hpp"
39 #include "gc/shared/gc_globals.hpp"
40 #include "nativeInst_aarch64.hpp"
41 #include "oops/objArrayKlass.hpp"
42 #include "runtime/frame.inline.hpp"
43 #include "runtime/sharedRuntime.hpp"
44 #include "runtime/stubRoutines.hpp"
45 #include "utilities/powerOfTwo.hpp"
46 #include "vmreg_aarch64.inline.hpp"
47
48
49 #ifndef PRODUCT
50 #define COMMENT(x) do { __ block_comment(x); } while (0)
51 #else
52 #define COMMENT(x)
53 #endif
54
55 NEEDS_CLEANUP // remove this definitions ?
56 const Register IC_Klass = rscratch2; // where the IC klass is cached
57 const Register SYNC_header = r0; // synchronization header
58 const Register SHIFT_count = r0; // where count for shift operations must be
59
60 #define __ _masm->
61
62
63 static void select_different_registers(Register preserve,
64 Register extra,
65 Register &tmp1,
66 Register &tmp2) {
67 if (tmp1 == preserve) {
68 assert_different_registers(tmp1, tmp2, extra);
69 tmp1 = extra;
70 } else if (tmp2 == preserve) {
71 assert_different_registers(tmp1, tmp2, extra);
72 tmp2 = extra;
73 }
74 assert_different_registers(preserve, tmp1, tmp2);
75 }
76
77
78
79 static void select_different_registers(Register preserve,
80 Register extra,
81 Register &tmp1,
82 Register &tmp2,
83 Register &tmp3) {
84 if (tmp1 == preserve) {
85 assert_different_registers(tmp1, tmp2, tmp3, extra);
86 tmp1 = extra;
87 } else if (tmp2 == preserve) {
88 assert_different_registers(tmp1, tmp2, tmp3, extra);
89 tmp2 = extra;
90 } else if (tmp3 == preserve) {
91 assert_different_registers(tmp1, tmp2, tmp3, extra);
92 tmp3 = extra;
93 }
94 assert_different_registers(preserve, tmp1, tmp2, tmp3);
95 }
96
97
98 bool LIR_Assembler::is_small_constant(LIR_Opr opr) { Unimplemented(); return false; }
99
100
101 LIR_Opr LIR_Assembler::receiverOpr() {
102 return FrameMap::receiver_opr;
103 }
104
105 LIR_Opr LIR_Assembler::osrBufferPointer() {
106 return FrameMap::as_pointer_opr(receiverOpr()->as_register());
107 }
108
109 //--------------fpu register translations-----------------------
110
111
112 address LIR_Assembler::float_constant(float f) {
113 address const_addr = __ float_constant(f);
114 if (const_addr == nullptr) {
115 bailout("const section overflow");
116 return __ code()->consts()->start();
117 } else {
118 return const_addr;
119 }
120 }
121
122
123 address LIR_Assembler::double_constant(double d) {
124 address const_addr = __ double_constant(d);
125 if (const_addr == nullptr) {
126 bailout("const section overflow");
127 return __ code()->consts()->start();
128 } else {
129 return const_addr;
130 }
131 }
132
133 address LIR_Assembler::int_constant(jlong n) {
134 address const_addr = __ long_constant(n);
135 if (const_addr == nullptr) {
136 bailout("const section overflow");
137 return __ code()->consts()->start();
138 } else {
139 return const_addr;
140 }
141 }
142
143 void LIR_Assembler::breakpoint() { Unimplemented(); }
144
145 void LIR_Assembler::push(LIR_Opr opr) { Unimplemented(); }
146
147 void LIR_Assembler::pop(LIR_Opr opr) { Unimplemented(); }
148
149 bool LIR_Assembler::is_literal_address(LIR_Address* addr) { Unimplemented(); return false; }
150 //-------------------------------------------
151
152 static Register as_reg(LIR_Opr op) {
153 return op->is_double_cpu() ? op->as_register_lo() : op->as_register();
154 }
155
156 static jlong as_long(LIR_Opr data) {
157 jlong result;
158 switch (data->type()) {
159 case T_INT:
160 result = (data->as_jint());
161 break;
162 case T_LONG:
163 result = (data->as_jlong());
164 break;
165 default:
166 ShouldNotReachHere();
167 result = 0; // unreachable
168 }
169 return result;
170 }
171
172 Address LIR_Assembler::as_Address(LIR_Address* addr, Register tmp) {
173 Register base = addr->base()->as_pointer_register();
174 LIR_Opr opr = addr->index();
175 if (opr->is_cpu_register()) {
176 Register index;
177 if (opr->is_single_cpu())
178 index = opr->as_register();
179 else
180 index = opr->as_register_lo();
181 assert(addr->disp() == 0, "must be");
182 switch(opr->type()) {
183 case T_INT:
184 return Address(base, index, Address::sxtw(addr->scale()));
185 case T_LONG:
186 return Address(base, index, Address::lsl(addr->scale()));
187 default:
188 ShouldNotReachHere();
189 }
190 } else {
191 assert(addr->scale() == 0,
192 "expected for immediate operand, was: %d", addr->scale());
193 ptrdiff_t offset = ptrdiff_t(addr->disp());
194 // NOTE: Does not handle any 16 byte vector access.
195 const uint type_size = type2aelembytes(addr->type(), true);
196 return __ legitimize_address(Address(base, offset), type_size, tmp);
197 }
198 return Address();
199 }
200
201 Address LIR_Assembler::as_Address_hi(LIR_Address* addr) {
202 ShouldNotReachHere();
203 return Address();
204 }
205
206 Address LIR_Assembler::as_Address(LIR_Address* addr) {
207 return as_Address(addr, rscratch1);
208 }
209
210 Address LIR_Assembler::as_Address_lo(LIR_Address* addr) {
211 return as_Address(addr, rscratch1); // Ouch
212 // FIXME: This needs to be much more clever. See x86.
213 }
214
215 // Ensure a valid Address (base + offset) to a stack-slot. If stack access is
216 // not encodable as a base + (immediate) offset, generate an explicit address
217 // calculation to hold the address in a temporary register.
218 Address LIR_Assembler::stack_slot_address(int index, uint size, Register tmp, int adjust) {
219 precond(size == 4 || size == 8);
220 Address addr = frame_map()->address_for_slot(index, adjust);
221 precond(addr.getMode() == Address::base_plus_offset);
222 precond(addr.base() == sp);
223 precond(addr.offset() > 0);
224 uint mask = size - 1;
225 assert((addr.offset() & mask) == 0, "scaled offsets only");
226 return __ legitimize_address(addr, size, tmp);
227 }
228
229 void LIR_Assembler::osr_entry() {
230 offsets()->set_value(CodeOffsets::OSR_Entry, code_offset());
231 BlockBegin* osr_entry = compilation()->hir()->osr_entry();
232 ValueStack* entry_state = osr_entry->state();
233 int number_of_locks = entry_state->locks_size();
234
235 // we jump here if osr happens with the interpreter
236 // state set up to continue at the beginning of the
237 // loop that triggered osr - in particular, we have
238 // the following registers setup:
239 //
240 // r2: osr buffer
241 //
242
243 // build frame
244 ciMethod* m = compilation()->method();
245 __ build_frame(initial_frame_size_in_bytes(), bang_size_in_bytes());
246
247 // OSR buffer is
248 //
249 // locals[nlocals-1..0]
250 // monitors[0..number_of_locks]
251 //
252 // locals is a direct copy of the interpreter frame so in the osr buffer
253 // so first slot in the local array is the last local from the interpreter
254 // and last slot is local[0] (receiver) from the interpreter
255 //
256 // Similarly with locks. The first lock slot in the osr buffer is the nth lock
257 // from the interpreter frame, the nth lock slot in the osr buffer is 0th lock
258 // in the interpreter frame (the method lock if a sync method)
259
260 // Initialize monitors in the compiled activation.
261 // r2: pointer to osr buffer
262 //
263 // All other registers are dead at this point and the locals will be
264 // copied into place by code emitted in the IR.
265
266 Register OSR_buf = osrBufferPointer()->as_pointer_register();
267 { assert(frame::interpreter_frame_monitor_size() == BasicObjectLock::size(), "adjust code below");
268 int monitor_offset = BytesPerWord * method()->max_locals() +
269 (2 * BytesPerWord) * (number_of_locks - 1);
270 // SharedRuntime::OSR_migration_begin() packs BasicObjectLocks in
271 // the OSR buffer using 2 word entries: first the lock and then
272 // the oop.
273 for (int i = 0; i < number_of_locks; i++) {
274 int slot_offset = monitor_offset - ((i * 2) * BytesPerWord);
275 #ifdef ASSERT
276 // verify the interpreter's monitor has a non-null object
277 {
278 Label L;
279 __ ldr(rscratch1, Address(OSR_buf, slot_offset + 1*BytesPerWord));
280 __ cbnz(rscratch1, L);
281 __ stop("locked object is null");
282 __ bind(L);
283 }
284 #endif
285 __ ldp(r19, r20, Address(OSR_buf, slot_offset));
286 __ str(r19, frame_map()->address_for_monitor_lock(i));
287 __ str(r20, frame_map()->address_for_monitor_object(i));
288 }
289 }
290 }
291
292
293 // inline cache check; done before the frame is built.
294 int LIR_Assembler::check_icache() {
295 Register receiver = FrameMap::receiver_opr->as_register();
296 Register ic_klass = IC_Klass;
297 int start_offset = __ offset();
298 __ inline_cache_check(receiver, ic_klass);
299
300 // if icache check fails, then jump to runtime routine
301 // Note: RECEIVER must still contain the receiver!
302 Label dont;
303 __ br(Assembler::EQ, dont);
304 __ far_jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub()));
305
306 // We align the verified entry point unless the method body
307 // (including its inline cache check) will fit in a single 64-byte
308 // icache line.
309 if (! method()->is_accessor() || __ offset() - start_offset > 4 * 4) {
310 // force alignment after the cache check.
311 __ align(CodeEntryAlignment);
312 }
313
314 __ bind(dont);
315 return start_offset;
316 }
317
318 void LIR_Assembler::clinit_barrier(ciMethod* method) {
319 assert(VM_Version::supports_fast_class_init_checks(), "sanity");
320 assert(!method->holder()->is_not_initialized(), "initialization should have been started");
321
322 Label L_skip_barrier;
323
324 __ mov_metadata(rscratch2, method->holder()->constant_encoding());
325 __ clinit_barrier(rscratch2, rscratch1, &L_skip_barrier /*L_fast_path*/);
326 __ far_jump(RuntimeAddress(SharedRuntime::get_handle_wrong_method_stub()));
327 __ bind(L_skip_barrier);
328 }
329
330 void LIR_Assembler::jobject2reg(jobject o, Register reg) {
331 if (o == nullptr) {
332 __ mov(reg, zr);
333 } else {
334 __ movoop(reg, o);
335 }
336 }
337
338 void LIR_Assembler::deoptimize_trap(CodeEmitInfo *info) {
339 address target = nullptr;
340 relocInfo::relocType reloc_type = relocInfo::none;
341
342 switch (patching_id(info)) {
343 case PatchingStub::access_field_id:
344 target = Runtime1::entry_for(Runtime1::access_field_patching_id);
345 reloc_type = relocInfo::section_word_type;
346 break;
347 case PatchingStub::load_klass_id:
348 target = Runtime1::entry_for(Runtime1::load_klass_patching_id);
349 reloc_type = relocInfo::metadata_type;
350 break;
351 case PatchingStub::load_mirror_id:
352 target = Runtime1::entry_for(Runtime1::load_mirror_patching_id);
353 reloc_type = relocInfo::oop_type;
354 break;
355 case PatchingStub::load_appendix_id:
356 target = Runtime1::entry_for(Runtime1::load_appendix_patching_id);
357 reloc_type = relocInfo::oop_type;
358 break;
359 default: ShouldNotReachHere();
360 }
361
362 __ far_call(RuntimeAddress(target));
363 add_call_info_here(info);
364 }
365
366 void LIR_Assembler::jobject2reg_with_patching(Register reg, CodeEmitInfo *info) {
367 deoptimize_trap(info);
368 }
369
370
371 // This specifies the rsp decrement needed to build the frame
372 int LIR_Assembler::initial_frame_size_in_bytes() const {
373 // if rounding, must let FrameMap know!
374
375 return in_bytes(frame_map()->framesize_in_bytes());
376 }
377
378
379 int LIR_Assembler::emit_exception_handler() {
380 // generate code for exception handler
381 address handler_base = __ start_a_stub(exception_handler_size());
382 if (handler_base == nullptr) {
383 // not enough space left for the handler
384 bailout("exception handler overflow");
385 return -1;
386 }
387
388 int offset = code_offset();
389
390 // the exception oop and pc are in r0, and r3
391 // no other registers need to be preserved, so invalidate them
392 __ invalidate_registers(false, true, true, false, true, true);
393
394 // check that there is really an exception
395 __ verify_not_null_oop(r0);
396
397 // search an exception handler (r0: exception oop, r3: throwing pc)
398 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::handle_exception_from_callee_id)));
399 __ should_not_reach_here();
400 guarantee(code_offset() - offset <= exception_handler_size(), "overflow");
401 __ end_a_stub();
402
403 return offset;
404 }
405
406
407 // Emit the code to remove the frame from the stack in the exception
408 // unwind path.
409 int LIR_Assembler::emit_unwind_handler() {
410 #ifndef PRODUCT
411 if (CommentedAssembly) {
412 _masm->block_comment("Unwind handler");
413 }
414 #endif
415
416 int offset = code_offset();
417
418 // Fetch the exception from TLS and clear out exception related thread state
419 __ ldr(r0, Address(rthread, JavaThread::exception_oop_offset()));
420 __ str(zr, Address(rthread, JavaThread::exception_oop_offset()));
421 __ str(zr, Address(rthread, JavaThread::exception_pc_offset()));
422
423 __ bind(_unwind_handler_entry);
424 __ verify_not_null_oop(r0);
425 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
426 __ mov(r19, r0); // Preserve the exception
427 }
428
429 // Perform needed unlocking
430 MonitorExitStub* stub = nullptr;
431 if (method()->is_synchronized()) {
432 monitor_address(0, FrameMap::r0_opr);
433 stub = new MonitorExitStub(FrameMap::r0_opr, true, 0);
434 if (LockingMode == LM_MONITOR) {
435 __ b(*stub->entry());
436 } else {
437 __ unlock_object(r5, r4, r0, *stub->entry());
438 }
439 __ bind(*stub->continuation());
440 }
441
442 if (compilation()->env()->dtrace_method_probes()) {
443 __ mov(c_rarg0, rthread);
444 __ mov_metadata(c_rarg1, method()->constant_encoding());
445 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), c_rarg0, c_rarg1);
446 }
447
448 if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
449 __ mov(r0, r19); // Restore the exception
450 }
451
452 // remove the activation and dispatch to the unwind handler
453 __ block_comment("remove_frame and dispatch to the unwind handler");
454 __ remove_frame(initial_frame_size_in_bytes());
455 __ far_jump(RuntimeAddress(Runtime1::entry_for(Runtime1::unwind_exception_id)));
456
457 // Emit the slow path assembly
458 if (stub != nullptr) {
459 stub->emit_code(this);
460 }
461
462 return offset;
463 }
464
465
466 int LIR_Assembler::emit_deopt_handler() {
467 // generate code for exception handler
468 address handler_base = __ start_a_stub(deopt_handler_size());
469 if (handler_base == nullptr) {
470 // not enough space left for the handler
471 bailout("deopt handler overflow");
472 return -1;
473 }
474
475 int offset = code_offset();
476
477 __ adr(lr, pc());
478 __ far_jump(RuntimeAddress(SharedRuntime::deopt_blob()->unpack()));
479 guarantee(code_offset() - offset <= deopt_handler_size(), "overflow");
480 __ end_a_stub();
481
482 return offset;
483 }
484
485 void LIR_Assembler::add_debug_info_for_branch(address adr, CodeEmitInfo* info) {
486 _masm->code_section()->relocate(adr, relocInfo::poll_type);
487 int pc_offset = code_offset();
488 flush_debug_info(pc_offset);
489 info->record_debug_info(compilation()->debug_info_recorder(), pc_offset);
490 if (info->exception_handlers() != nullptr) {
491 compilation()->add_exception_handlers_for_pco(pc_offset, info->exception_handlers());
492 }
493 }
494
495 void LIR_Assembler::return_op(LIR_Opr result, C1SafepointPollStub* code_stub) {
496 assert(result->is_illegal() || !result->is_single_cpu() || result->as_register() == r0, "word returns are in r0,");
497
498 // Pop the stack before the safepoint code
499 __ remove_frame(initial_frame_size_in_bytes());
500
501 if (StackReservedPages > 0 && compilation()->has_reserved_stack_access()) {
502 __ reserved_stack_check();
503 }
504
505 code_stub->set_safepoint_offset(__ offset());
506 __ relocate(relocInfo::poll_return_type);
507 __ safepoint_poll(*code_stub->entry(), true /* at_return */, false /* acquire */, true /* in_nmethod */);
508 __ ret(lr);
509 }
510
511 int LIR_Assembler::safepoint_poll(LIR_Opr tmp, CodeEmitInfo* info) {
512 guarantee(info != nullptr, "Shouldn't be null");
513 __ get_polling_page(rscratch1, relocInfo::poll_type);
514 add_debug_info_for_branch(info); // This isn't just debug info:
515 // it's the oop map
516 __ read_polling_page(rscratch1, relocInfo::poll_type);
517 return __ offset();
518 }
519
520
521 void LIR_Assembler::move_regs(Register from_reg, Register to_reg) {
522 if (from_reg == r31_sp)
523 from_reg = sp;
524 if (to_reg == r31_sp)
525 to_reg = sp;
526 __ mov(to_reg, from_reg);
527 }
528
529 void LIR_Assembler::swap_reg(Register a, Register b) { Unimplemented(); }
530
531
532 void LIR_Assembler::const2reg(LIR_Opr src, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) {
533 assert(src->is_constant(), "should not call otherwise");
534 assert(dest->is_register(), "should not call otherwise");
535 LIR_Const* c = src->as_constant_ptr();
536
537 switch (c->type()) {
538 case T_INT: {
539 assert(patch_code == lir_patch_none, "no patching handled here");
540 __ movw(dest->as_register(), c->as_jint());
541 break;
542 }
543
544 case T_ADDRESS: {
545 assert(patch_code == lir_patch_none, "no patching handled here");
546 __ mov(dest->as_register(), c->as_jint());
547 break;
548 }
549
550 case T_LONG: {
551 assert(patch_code == lir_patch_none, "no patching handled here");
552 __ mov(dest->as_register_lo(), (intptr_t)c->as_jlong());
553 break;
554 }
555
556 case T_OBJECT: {
557 if (patch_code == lir_patch_none) {
558 jobject2reg(c->as_jobject(), dest->as_register());
559 } else {
560 jobject2reg_with_patching(dest->as_register(), info);
561 }
562 break;
563 }
564
565 case T_METADATA: {
566 if (patch_code != lir_patch_none) {
567 klass2reg_with_patching(dest->as_register(), info);
568 } else {
569 __ mov_metadata(dest->as_register(), c->as_metadata());
570 }
571 break;
572 }
573
574 case T_FLOAT: {
575 if (__ operand_valid_for_float_immediate(c->as_jfloat())) {
576 __ fmovs(dest->as_float_reg(), (c->as_jfloat()));
577 } else {
578 __ adr(rscratch1, InternalAddress(float_constant(c->as_jfloat())));
579 __ ldrs(dest->as_float_reg(), Address(rscratch1));
580 }
581 break;
582 }
583
584 case T_DOUBLE: {
585 if (__ operand_valid_for_float_immediate(c->as_jdouble())) {
586 __ fmovd(dest->as_double_reg(), (c->as_jdouble()));
587 } else {
588 __ adr(rscratch1, InternalAddress(double_constant(c->as_jdouble())));
589 __ ldrd(dest->as_double_reg(), Address(rscratch1));
590 }
591 break;
592 }
593
594 default:
595 ShouldNotReachHere();
596 }
597 }
598
599 void LIR_Assembler::const2stack(LIR_Opr src, LIR_Opr dest) {
600 LIR_Const* c = src->as_constant_ptr();
601 switch (c->type()) {
602 case T_OBJECT:
603 {
604 if (! c->as_jobject())
605 __ str(zr, frame_map()->address_for_slot(dest->single_stack_ix()));
606 else {
607 const2reg(src, FrameMap::rscratch1_opr, lir_patch_none, nullptr);
608 reg2stack(FrameMap::rscratch1_opr, dest, c->type(), false);
609 }
610 }
611 break;
612 case T_ADDRESS:
613 {
614 const2reg(src, FrameMap::rscratch1_opr, lir_patch_none, nullptr);
615 reg2stack(FrameMap::rscratch1_opr, dest, c->type(), false);
616 }
617 case T_INT:
618 case T_FLOAT:
619 {
620 Register reg = zr;
621 if (c->as_jint_bits() == 0)
622 __ strw(zr, frame_map()->address_for_slot(dest->single_stack_ix()));
623 else {
624 __ movw(rscratch1, c->as_jint_bits());
625 __ strw(rscratch1, frame_map()->address_for_slot(dest->single_stack_ix()));
626 }
627 }
628 break;
629 case T_LONG:
630 case T_DOUBLE:
631 {
632 Register reg = zr;
633 if (c->as_jlong_bits() == 0)
634 __ str(zr, frame_map()->address_for_slot(dest->double_stack_ix(),
635 lo_word_offset_in_bytes));
636 else {
637 __ mov(rscratch1, (intptr_t)c->as_jlong_bits());
638 __ str(rscratch1, frame_map()->address_for_slot(dest->double_stack_ix(),
639 lo_word_offset_in_bytes));
640 }
641 }
642 break;
643 default:
644 ShouldNotReachHere();
645 }
646 }
647
648 void LIR_Assembler::const2mem(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info, bool wide) {
649 assert(src->is_constant(), "should not call otherwise");
650 LIR_Const* c = src->as_constant_ptr();
651 LIR_Address* to_addr = dest->as_address_ptr();
652
653 void (Assembler::* insn)(Register Rt, const Address &adr);
654
655 switch (type) {
656 case T_ADDRESS:
657 assert(c->as_jint() == 0, "should be");
658 insn = &Assembler::str;
659 break;
660 case T_LONG:
661 assert(c->as_jlong() == 0, "should be");
662 insn = &Assembler::str;
663 break;
664 case T_INT:
665 assert(c->as_jint() == 0, "should be");
666 insn = &Assembler::strw;
667 break;
668 case T_OBJECT:
669 case T_ARRAY:
670 assert(c->as_jobject() == 0, "should be");
671 if (UseCompressedOops && !wide) {
672 insn = &Assembler::strw;
673 } else {
674 insn = &Assembler::str;
675 }
676 break;
677 case T_CHAR:
678 case T_SHORT:
679 assert(c->as_jint() == 0, "should be");
680 insn = &Assembler::strh;
681 break;
682 case T_BOOLEAN:
683 case T_BYTE:
684 assert(c->as_jint() == 0, "should be");
685 insn = &Assembler::strb;
686 break;
687 default:
688 ShouldNotReachHere();
689 insn = &Assembler::str; // unreachable
690 }
691
692 if (info) add_debug_info_for_null_check_here(info);
693 (_masm->*insn)(zr, as_Address(to_addr, rscratch1));
694 }
695
696 void LIR_Assembler::reg2reg(LIR_Opr src, LIR_Opr dest) {
697 assert(src->is_register(), "should not call otherwise");
698 assert(dest->is_register(), "should not call otherwise");
699
700 // move between cpu-registers
701 if (dest->is_single_cpu()) {
702 if (src->type() == T_LONG) {
703 // Can do LONG -> OBJECT
704 move_regs(src->as_register_lo(), dest->as_register());
705 return;
706 }
707 assert(src->is_single_cpu(), "must match");
708 if (src->type() == T_OBJECT) {
709 __ verify_oop(src->as_register());
710 }
711 move_regs(src->as_register(), dest->as_register());
712
713 } else if (dest->is_double_cpu()) {
714 if (is_reference_type(src->type())) {
715 // Surprising to me but we can see move of a long to t_object
716 __ verify_oop(src->as_register());
717 move_regs(src->as_register(), dest->as_register_lo());
718 return;
719 }
720 assert(src->is_double_cpu(), "must match");
721 Register f_lo = src->as_register_lo();
722 Register f_hi = src->as_register_hi();
723 Register t_lo = dest->as_register_lo();
724 Register t_hi = dest->as_register_hi();
725 assert(f_hi == f_lo, "must be same");
726 assert(t_hi == t_lo, "must be same");
727 move_regs(f_lo, t_lo);
728
729 } else if (dest->is_single_fpu()) {
730 __ fmovs(dest->as_float_reg(), src->as_float_reg());
731
732 } else if (dest->is_double_fpu()) {
733 __ fmovd(dest->as_double_reg(), src->as_double_reg());
734
735 } else {
736 ShouldNotReachHere();
737 }
738 }
739
740 void LIR_Assembler::reg2stack(LIR_Opr src, LIR_Opr dest, BasicType type, bool pop_fpu_stack) {
741 precond(src->is_register() && dest->is_stack());
742
743 uint const c_sz32 = sizeof(uint32_t);
744 uint const c_sz64 = sizeof(uint64_t);
745
746 if (src->is_single_cpu()) {
747 int index = dest->single_stack_ix();
748 if (is_reference_type(type)) {
749 __ str(src->as_register(), stack_slot_address(index, c_sz64, rscratch1));
750 __ verify_oop(src->as_register());
751 } else if (type == T_METADATA || type == T_DOUBLE || type == T_ADDRESS) {
752 __ str(src->as_register(), stack_slot_address(index, c_sz64, rscratch1));
753 } else {
754 __ strw(src->as_register(), stack_slot_address(index, c_sz32, rscratch1));
755 }
756
757 } else if (src->is_double_cpu()) {
758 int index = dest->double_stack_ix();
759 Address dest_addr_LO = stack_slot_address(index, c_sz64, rscratch1, lo_word_offset_in_bytes);
760 __ str(src->as_register_lo(), dest_addr_LO);
761
762 } else if (src->is_single_fpu()) {
763 int index = dest->single_stack_ix();
764 __ strs(src->as_float_reg(), stack_slot_address(index, c_sz32, rscratch1));
765
766 } else if (src->is_double_fpu()) {
767 int index = dest->double_stack_ix();
768 __ strd(src->as_double_reg(), stack_slot_address(index, c_sz64, rscratch1));
769
770 } else {
771 ShouldNotReachHere();
772 }
773 }
774
775
776 void LIR_Assembler::reg2mem(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool pop_fpu_stack, bool wide) {
777 LIR_Address* to_addr = dest->as_address_ptr();
778 PatchingStub* patch = nullptr;
779 Register compressed_src = rscratch1;
780
781 if (patch_code != lir_patch_none) {
782 deoptimize_trap(info);
783 return;
784 }
785
786 if (is_reference_type(type)) {
787 __ verify_oop(src->as_register());
788
789 if (UseCompressedOops && !wide) {
790 __ encode_heap_oop(compressed_src, src->as_register());
791 } else {
792 compressed_src = src->as_register();
793 }
794 }
795
796 int null_check_here = code_offset();
797 switch (type) {
798 case T_FLOAT: {
799 __ strs(src->as_float_reg(), as_Address(to_addr));
800 break;
801 }
802
803 case T_DOUBLE: {
804 __ strd(src->as_double_reg(), as_Address(to_addr));
805 break;
806 }
807
808 case T_ARRAY: // fall through
809 case T_OBJECT: // fall through
810 if (UseCompressedOops && !wide) {
811 __ strw(compressed_src, as_Address(to_addr, rscratch2));
812 } else {
813 __ str(compressed_src, as_Address(to_addr));
814 }
815 break;
816 case T_METADATA:
817 // We get here to store a method pointer to the stack to pass to
818 // a dtrace runtime call. This can't work on 64 bit with
819 // compressed klass ptrs: T_METADATA can be a compressed klass
820 // ptr or a 64 bit method pointer.
821 ShouldNotReachHere();
822 __ str(src->as_register(), as_Address(to_addr));
823 break;
824 case T_ADDRESS:
825 __ str(src->as_register(), as_Address(to_addr));
826 break;
827 case T_INT:
828 __ strw(src->as_register(), as_Address(to_addr));
829 break;
830
831 case T_LONG: {
832 __ str(src->as_register_lo(), as_Address_lo(to_addr));
833 break;
834 }
835
836 case T_BYTE: // fall through
837 case T_BOOLEAN: {
838 __ strb(src->as_register(), as_Address(to_addr));
839 break;
840 }
841
842 case T_CHAR: // fall through
843 case T_SHORT:
844 __ strh(src->as_register(), as_Address(to_addr));
845 break;
846
847 default:
848 ShouldNotReachHere();
849 }
850 if (info != nullptr) {
851 add_debug_info_for_null_check(null_check_here, info);
852 }
853 }
854
855
856 void LIR_Assembler::stack2reg(LIR_Opr src, LIR_Opr dest, BasicType type) {
857 precond(src->is_stack() && dest->is_register());
858
859 uint const c_sz32 = sizeof(uint32_t);
860 uint const c_sz64 = sizeof(uint64_t);
861
862 if (dest->is_single_cpu()) {
863 int index = src->single_stack_ix();
864 if (is_reference_type(type)) {
865 __ ldr(dest->as_register(), stack_slot_address(index, c_sz64, rscratch1));
866 __ verify_oop(dest->as_register());
867 } else if (type == T_METADATA || type == T_ADDRESS) {
868 __ ldr(dest->as_register(), stack_slot_address(index, c_sz64, rscratch1));
869 } else {
870 __ ldrw(dest->as_register(), stack_slot_address(index, c_sz32, rscratch1));
871 }
872
873 } else if (dest->is_double_cpu()) {
874 int index = src->double_stack_ix();
875 Address src_addr_LO = stack_slot_address(index, c_sz64, rscratch1, lo_word_offset_in_bytes);
876 __ ldr(dest->as_register_lo(), src_addr_LO);
877
878 } else if (dest->is_single_fpu()) {
879 int index = src->single_stack_ix();
880 __ ldrs(dest->as_float_reg(), stack_slot_address(index, c_sz32, rscratch1));
881
882 } else if (dest->is_double_fpu()) {
883 int index = src->double_stack_ix();
884 __ ldrd(dest->as_double_reg(), stack_slot_address(index, c_sz64, rscratch1));
885
886 } else {
887 ShouldNotReachHere();
888 }
889 }
890
891
892 void LIR_Assembler::klass2reg_with_patching(Register reg, CodeEmitInfo* info) {
893 address target = nullptr;
894 relocInfo::relocType reloc_type = relocInfo::none;
895
896 switch (patching_id(info)) {
897 case PatchingStub::access_field_id:
898 target = Runtime1::entry_for(Runtime1::access_field_patching_id);
899 reloc_type = relocInfo::section_word_type;
900 break;
901 case PatchingStub::load_klass_id:
902 target = Runtime1::entry_for(Runtime1::load_klass_patching_id);
903 reloc_type = relocInfo::metadata_type;
904 break;
905 case PatchingStub::load_mirror_id:
906 target = Runtime1::entry_for(Runtime1::load_mirror_patching_id);
907 reloc_type = relocInfo::oop_type;
908 break;
909 case PatchingStub::load_appendix_id:
910 target = Runtime1::entry_for(Runtime1::load_appendix_patching_id);
911 reloc_type = relocInfo::oop_type;
912 break;
913 default: ShouldNotReachHere();
914 }
915
916 __ far_call(RuntimeAddress(target));
917 add_call_info_here(info);
918 }
919
920 void LIR_Assembler::stack2stack(LIR_Opr src, LIR_Opr dest, BasicType type) {
921
922 LIR_Opr temp;
923 if (type == T_LONG || type == T_DOUBLE)
924 temp = FrameMap::rscratch1_long_opr;
925 else
926 temp = FrameMap::rscratch1_opr;
927
928 stack2reg(src, temp, src->type());
929 reg2stack(temp, dest, dest->type(), false);
930 }
931
932
933 void LIR_Assembler::mem2reg(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool wide) {
934 LIR_Address* addr = src->as_address_ptr();
935 LIR_Address* from_addr = src->as_address_ptr();
936
937 if (addr->base()->type() == T_OBJECT) {
938 __ verify_oop(addr->base()->as_pointer_register());
939 }
940
941 if (patch_code != lir_patch_none) {
942 deoptimize_trap(info);
943 return;
944 }
945
946 if (info != nullptr) {
947 add_debug_info_for_null_check_here(info);
948 }
949 int null_check_here = code_offset();
950 switch (type) {
951 case T_FLOAT: {
952 __ ldrs(dest->as_float_reg(), as_Address(from_addr));
953 break;
954 }
955
956 case T_DOUBLE: {
957 __ ldrd(dest->as_double_reg(), as_Address(from_addr));
958 break;
959 }
960
961 case T_ARRAY: // fall through
962 case T_OBJECT: // fall through
963 if (UseCompressedOops && !wide) {
964 __ ldrw(dest->as_register(), as_Address(from_addr));
965 } else {
966 __ ldr(dest->as_register(), as_Address(from_addr));
967 }
968 break;
969 case T_METADATA:
970 // We get here to store a method pointer to the stack to pass to
971 // a dtrace runtime call. This can't work on 64 bit with
972 // compressed klass ptrs: T_METADATA can be a compressed klass
973 // ptr or a 64 bit method pointer.
974 ShouldNotReachHere();
975 __ ldr(dest->as_register(), as_Address(from_addr));
976 break;
977 case T_ADDRESS:
978 __ ldr(dest->as_register(), as_Address(from_addr));
979 break;
980 case T_INT:
981 __ ldrw(dest->as_register(), as_Address(from_addr));
982 break;
983
984 case T_LONG: {
985 __ ldr(dest->as_register_lo(), as_Address_lo(from_addr));
986 break;
987 }
988
989 case T_BYTE:
990 __ ldrsb(dest->as_register(), as_Address(from_addr));
991 break;
992 case T_BOOLEAN: {
993 __ ldrb(dest->as_register(), as_Address(from_addr));
994 break;
995 }
996
997 case T_CHAR:
998 __ ldrh(dest->as_register(), as_Address(from_addr));
999 break;
1000 case T_SHORT:
1001 __ ldrsh(dest->as_register(), as_Address(from_addr));
1002 break;
1003
1004 default:
1005 ShouldNotReachHere();
1006 }
1007
1008 if (is_reference_type(type)) {
1009 if (UseCompressedOops && !wide) {
1010 __ decode_heap_oop(dest->as_register());
1011 }
1012
1013 if (!(UseZGC && !ZGenerational)) {
1014 // Load barrier has not yet been applied, so ZGC can't verify the oop here
1015 __ verify_oop(dest->as_register());
1016 }
1017 }
1018 }
1019
1020
1021 int LIR_Assembler::array_element_size(BasicType type) const {
1022 int elem_size = type2aelembytes(type);
1023 return exact_log2(elem_size);
1024 }
1025
1026
1027 void LIR_Assembler::emit_op3(LIR_Op3* op) {
1028 switch (op->code()) {
1029 case lir_idiv:
1030 case lir_irem:
1031 arithmetic_idiv(op->code(),
1032 op->in_opr1(),
1033 op->in_opr2(),
1034 op->in_opr3(),
1035 op->result_opr(),
1036 op->info());
1037 break;
1038 case lir_fmad:
1039 __ fmaddd(op->result_opr()->as_double_reg(),
1040 op->in_opr1()->as_double_reg(),
1041 op->in_opr2()->as_double_reg(),
1042 op->in_opr3()->as_double_reg());
1043 break;
1044 case lir_fmaf:
1045 __ fmadds(op->result_opr()->as_float_reg(),
1046 op->in_opr1()->as_float_reg(),
1047 op->in_opr2()->as_float_reg(),
1048 op->in_opr3()->as_float_reg());
1049 break;
1050 default: ShouldNotReachHere(); break;
1051 }
1052 }
1053
1054 void LIR_Assembler::emit_opBranch(LIR_OpBranch* op) {
1055 #ifdef ASSERT
1056 assert(op->block() == nullptr || op->block()->label() == op->label(), "wrong label");
1057 if (op->block() != nullptr) _branch_target_blocks.append(op->block());
1058 if (op->ublock() != nullptr) _branch_target_blocks.append(op->ublock());
1059 #endif
1060
1061 if (op->cond() == lir_cond_always) {
1062 if (op->info() != nullptr) add_debug_info_for_branch(op->info());
1063 __ b(*(op->label()));
1064 } else {
1065 Assembler::Condition acond;
1066 if (op->code() == lir_cond_float_branch) {
1067 bool is_unordered = (op->ublock() == op->block());
1068 // Assembler::EQ does not permit unordered branches, so we add
1069 // another branch here. Likewise, Assembler::NE does not permit
1070 // ordered branches.
1071 if ((is_unordered && op->cond() == lir_cond_equal)
1072 || (!is_unordered && op->cond() == lir_cond_notEqual))
1073 __ br(Assembler::VS, *(op->ublock()->label()));
1074 switch(op->cond()) {
1075 case lir_cond_equal: acond = Assembler::EQ; break;
1076 case lir_cond_notEqual: acond = Assembler::NE; break;
1077 case lir_cond_less: acond = (is_unordered ? Assembler::LT : Assembler::LO); break;
1078 case lir_cond_lessEqual: acond = (is_unordered ? Assembler::LE : Assembler::LS); break;
1079 case lir_cond_greaterEqual: acond = (is_unordered ? Assembler::HS : Assembler::GE); break;
1080 case lir_cond_greater: acond = (is_unordered ? Assembler::HI : Assembler::GT); break;
1081 default: ShouldNotReachHere();
1082 acond = Assembler::EQ; // unreachable
1083 }
1084 } else {
1085 switch (op->cond()) {
1086 case lir_cond_equal: acond = Assembler::EQ; break;
1087 case lir_cond_notEqual: acond = Assembler::NE; break;
1088 case lir_cond_less: acond = Assembler::LT; break;
1089 case lir_cond_lessEqual: acond = Assembler::LE; break;
1090 case lir_cond_greaterEqual: acond = Assembler::GE; break;
1091 case lir_cond_greater: acond = Assembler::GT; break;
1092 case lir_cond_belowEqual: acond = Assembler::LS; break;
1093 case lir_cond_aboveEqual: acond = Assembler::HS; break;
1094 default: ShouldNotReachHere();
1095 acond = Assembler::EQ; // unreachable
1096 }
1097 }
1098 __ br(acond,*(op->label()));
1099 }
1100 }
1101
1102
1103
1104 void LIR_Assembler::emit_opConvert(LIR_OpConvert* op) {
1105 LIR_Opr src = op->in_opr();
1106 LIR_Opr dest = op->result_opr();
1107
1108 switch (op->bytecode()) {
1109 case Bytecodes::_i2f:
1110 {
1111 __ scvtfws(dest->as_float_reg(), src->as_register());
1112 break;
1113 }
1114 case Bytecodes::_i2d:
1115 {
1116 __ scvtfwd(dest->as_double_reg(), src->as_register());
1117 break;
1118 }
1119 case Bytecodes::_l2d:
1120 {
1121 __ scvtfd(dest->as_double_reg(), src->as_register_lo());
1122 break;
1123 }
1124 case Bytecodes::_l2f:
1125 {
1126 __ scvtfs(dest->as_float_reg(), src->as_register_lo());
1127 break;
1128 }
1129 case Bytecodes::_f2d:
1130 {
1131 __ fcvts(dest->as_double_reg(), src->as_float_reg());
1132 break;
1133 }
1134 case Bytecodes::_d2f:
1135 {
1136 __ fcvtd(dest->as_float_reg(), src->as_double_reg());
1137 break;
1138 }
1139 case Bytecodes::_i2c:
1140 {
1141 __ ubfx(dest->as_register(), src->as_register(), 0, 16);
1142 break;
1143 }
1144 case Bytecodes::_i2l:
1145 {
1146 __ sxtw(dest->as_register_lo(), src->as_register());
1147 break;
1148 }
1149 case Bytecodes::_i2s:
1150 {
1151 __ sxth(dest->as_register(), src->as_register());
1152 break;
1153 }
1154 case Bytecodes::_i2b:
1155 {
1156 __ sxtb(dest->as_register(), src->as_register());
1157 break;
1158 }
1159 case Bytecodes::_l2i:
1160 {
1161 _masm->block_comment("FIXME: This could be a no-op");
1162 __ uxtw(dest->as_register(), src->as_register_lo());
1163 break;
1164 }
1165 case Bytecodes::_d2l:
1166 {
1167 __ fcvtzd(dest->as_register_lo(), src->as_double_reg());
1168 break;
1169 }
1170 case Bytecodes::_f2i:
1171 {
1172 __ fcvtzsw(dest->as_register(), src->as_float_reg());
1173 break;
1174 }
1175 case Bytecodes::_f2l:
1176 {
1177 __ fcvtzs(dest->as_register_lo(), src->as_float_reg());
1178 break;
1179 }
1180 case Bytecodes::_d2i:
1181 {
1182 __ fcvtzdw(dest->as_register(), src->as_double_reg());
1183 break;
1184 }
1185 default: ShouldNotReachHere();
1186 }
1187 }
1188
1189 void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) {
1190 if (op->init_check()) {
1191 __ ldrb(rscratch1, Address(op->klass()->as_register(),
1192 InstanceKlass::init_state_offset()));
1193 __ cmpw(rscratch1, InstanceKlass::fully_initialized);
1194 add_debug_info_for_null_check_here(op->stub()->info());
1195 __ br(Assembler::NE, *op->stub()->entry());
1196 }
1197 __ allocate_object(op->obj()->as_register(),
1198 op->tmp1()->as_register(),
1199 op->tmp2()->as_register(),
1200 op->header_size(),
1201 op->object_size(),
1202 op->klass()->as_register(),
1203 *op->stub()->entry());
1204 __ bind(*op->stub()->continuation());
1205 }
1206
1207 void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) {
1208 Register len = op->len()->as_register();
1209 __ uxtw(len, len);
1210
1211 if (UseSlowPath ||
1212 (!UseFastNewObjectArray && is_reference_type(op->type())) ||
1213 (!UseFastNewTypeArray && !is_reference_type(op->type()))) {
1214 __ b(*op->stub()->entry());
1215 } else {
1216 Register tmp1 = op->tmp1()->as_register();
1217 Register tmp2 = op->tmp2()->as_register();
1218 Register tmp3 = op->tmp3()->as_register();
1219 if (len == tmp1) {
1220 tmp1 = tmp3;
1221 } else if (len == tmp2) {
1222 tmp2 = tmp3;
1223 } else if (len == tmp3) {
1224 // everything is ok
1225 } else {
1226 __ mov(tmp3, len);
1227 }
1228 __ allocate_array(op->obj()->as_register(),
1229 len,
1230 tmp1,
1231 tmp2,
1232 arrayOopDesc::base_offset_in_bytes(op->type()),
1233 array_element_size(op->type()),
1234 op->klass()->as_register(),
1235 *op->stub()->entry());
1236 }
1237 __ bind(*op->stub()->continuation());
1238 }
1239
1240 void LIR_Assembler::type_profile_helper(Register mdo,
1241 ciMethodData *md, ciProfileData *data,
1242 Register recv, Label* update_done) {
1243 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
1244 Label next_test;
1245 // See if the receiver is receiver[n].
1246 __ lea(rscratch2, Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i))));
1247 __ ldr(rscratch1, Address(rscratch2));
1248 __ cmp(recv, rscratch1);
1249 __ br(Assembler::NE, next_test);
1250 Address data_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i)));
1251 __ addptr(data_addr, DataLayout::counter_increment);
1252 __ b(*update_done);
1253 __ bind(next_test);
1254 }
1255
1256 // Didn't find receiver; find next empty slot and fill it in
1257 for (uint i = 0; i < ReceiverTypeData::row_limit(); i++) {
1258 Label next_test;
1259 __ lea(rscratch2,
1260 Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i))));
1261 Address recv_addr(rscratch2);
1262 __ ldr(rscratch1, recv_addr);
1263 __ cbnz(rscratch1, next_test);
1264 __ str(recv, recv_addr);
1265 __ mov(rscratch1, DataLayout::counter_increment);
1266 __ lea(rscratch2, Address(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i))));
1267 __ str(rscratch1, Address(rscratch2));
1268 __ b(*update_done);
1269 __ bind(next_test);
1270 }
1271 }
1272
1273 void LIR_Assembler::emit_typecheck_helper(LIR_OpTypeCheck *op, Label* success, Label* failure, Label* obj_is_null) {
1274 // we always need a stub for the failure case.
1275 CodeStub* stub = op->stub();
1276 Register obj = op->object()->as_register();
1277 Register k_RInfo = op->tmp1()->as_register();
1278 Register klass_RInfo = op->tmp2()->as_register();
1279 Register dst = op->result_opr()->as_register();
1280 ciKlass* k = op->klass();
1281 Register Rtmp1 = noreg;
1282
1283 // check if it needs to be profiled
1284 ciMethodData* md;
1285 ciProfileData* data;
1286
1287 const bool should_profile = op->should_profile();
1288
1289 if (should_profile) {
1290 ciMethod* method = op->profiled_method();
1291 assert(method != nullptr, "Should have method");
1292 int bci = op->profiled_bci();
1293 md = method->method_data_or_null();
1294 assert(md != nullptr, "Sanity");
1295 data = md->bci_to_data(bci);
1296 assert(data != nullptr, "need data for type check");
1297 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
1298 }
1299 Label profile_cast_success, profile_cast_failure;
1300 Label *success_target = should_profile ? &profile_cast_success : success;
1301 Label *failure_target = should_profile ? &profile_cast_failure : failure;
1302
1303 if (obj == k_RInfo) {
1304 k_RInfo = dst;
1305 } else if (obj == klass_RInfo) {
1306 klass_RInfo = dst;
1307 }
1308 if (k->is_loaded() && !UseCompressedClassPointers) {
1309 select_different_registers(obj, dst, k_RInfo, klass_RInfo);
1310 } else {
1311 Rtmp1 = op->tmp3()->as_register();
1312 select_different_registers(obj, dst, k_RInfo, klass_RInfo, Rtmp1);
1313 }
1314
1315 assert_different_registers(obj, k_RInfo, klass_RInfo);
1316
1317 if (should_profile) {
1318 Label not_null;
1319 __ cbnz(obj, not_null);
1320 // Object is null; update MDO and exit
1321 Register mdo = klass_RInfo;
1322 __ mov_metadata(mdo, md->constant_encoding());
1323 Address data_addr
1324 = __ form_address(rscratch2, mdo,
1325 md->byte_offset_of_slot(data, DataLayout::flags_offset()),
1326 0);
1327 __ ldrb(rscratch1, data_addr);
1328 __ orr(rscratch1, rscratch1, BitData::null_seen_byte_constant());
1329 __ strb(rscratch1, data_addr);
1330 __ b(*obj_is_null);
1331 __ bind(not_null);
1332 } else {
1333 __ cbz(obj, *obj_is_null);
1334 }
1335
1336 if (!k->is_loaded()) {
1337 klass2reg_with_patching(k_RInfo, op->info_for_patch());
1338 } else {
1339 __ mov_metadata(k_RInfo, k->constant_encoding());
1340 }
1341 __ verify_oop(obj);
1342
1343 if (op->fast_check()) {
1344 // get object class
1345 // not a safepoint as obj null check happens earlier
1346 __ load_klass(rscratch1, obj);
1347 __ cmp( rscratch1, k_RInfo);
1348
1349 __ br(Assembler::NE, *failure_target);
1350 // successful cast, fall through to profile or jump
1351 } else {
1352 // get object class
1353 // not a safepoint as obj null check happens earlier
1354 __ load_klass(klass_RInfo, obj);
1355 if (k->is_loaded()) {
1356 // See if we get an immediate positive hit
1357 __ ldr(rscratch1, Address(klass_RInfo, int64_t(k->super_check_offset())));
1358 __ cmp(k_RInfo, rscratch1);
1359 if ((juint)in_bytes(Klass::secondary_super_cache_offset()) != k->super_check_offset()) {
1360 __ br(Assembler::NE, *failure_target);
1361 // successful cast, fall through to profile or jump
1362 } else {
1363 // See if we get an immediate positive hit
1364 __ br(Assembler::EQ, *success_target);
1365 // check for self
1366 __ cmp(klass_RInfo, k_RInfo);
1367 __ br(Assembler::EQ, *success_target);
1368
1369 __ stp(klass_RInfo, k_RInfo, Address(__ pre(sp, -2 * wordSize)));
1370 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1371 __ ldr(klass_RInfo, Address(__ post(sp, 2 * wordSize)));
1372 // result is a boolean
1373 __ cbzw(klass_RInfo, *failure_target);
1374 // successful cast, fall through to profile or jump
1375 }
1376 } else {
1377 // perform the fast part of the checking logic
1378 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, nullptr);
1379 // call out-of-line instance of __ check_klass_subtype_slow_path(...):
1380 __ stp(klass_RInfo, k_RInfo, Address(__ pre(sp, -2 * wordSize)));
1381 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1382 __ ldp(k_RInfo, klass_RInfo, Address(__ post(sp, 2 * wordSize)));
1383 // result is a boolean
1384 __ cbz(k_RInfo, *failure_target);
1385 // successful cast, fall through to profile or jump
1386 }
1387 }
1388 if (should_profile) {
1389 Register mdo = klass_RInfo, recv = k_RInfo;
1390 __ bind(profile_cast_success);
1391 __ mov_metadata(mdo, md->constant_encoding());
1392 __ load_klass(recv, obj);
1393 Label update_done;
1394 type_profile_helper(mdo, md, data, recv, success);
1395 __ b(*success);
1396
1397 __ bind(profile_cast_failure);
1398 __ mov_metadata(mdo, md->constant_encoding());
1399 Address counter_addr
1400 = __ form_address(rscratch2, mdo,
1401 md->byte_offset_of_slot(data, CounterData::count_offset()),
1402 0);
1403 __ ldr(rscratch1, counter_addr);
1404 __ sub(rscratch1, rscratch1, DataLayout::counter_increment);
1405 __ str(rscratch1, counter_addr);
1406 __ b(*failure);
1407 }
1408 __ b(*success);
1409 }
1410
1411
1412 void LIR_Assembler::emit_opTypeCheck(LIR_OpTypeCheck* op) {
1413 const bool should_profile = op->should_profile();
1414
1415 LIR_Code code = op->code();
1416 if (code == lir_store_check) {
1417 Register value = op->object()->as_register();
1418 Register array = op->array()->as_register();
1419 Register k_RInfo = op->tmp1()->as_register();
1420 Register klass_RInfo = op->tmp2()->as_register();
1421 Register Rtmp1 = op->tmp3()->as_register();
1422
1423 CodeStub* stub = op->stub();
1424
1425 // check if it needs to be profiled
1426 ciMethodData* md;
1427 ciProfileData* data;
1428
1429 if (should_profile) {
1430 ciMethod* method = op->profiled_method();
1431 assert(method != nullptr, "Should have method");
1432 int bci = op->profiled_bci();
1433 md = method->method_data_or_null();
1434 assert(md != nullptr, "Sanity");
1435 data = md->bci_to_data(bci);
1436 assert(data != nullptr, "need data for type check");
1437 assert(data->is_ReceiverTypeData(), "need ReceiverTypeData for type check");
1438 }
1439 Label profile_cast_success, profile_cast_failure, done;
1440 Label *success_target = should_profile ? &profile_cast_success : &done;
1441 Label *failure_target = should_profile ? &profile_cast_failure : stub->entry();
1442
1443 if (should_profile) {
1444 Label not_null;
1445 __ cbnz(value, not_null);
1446 // Object is null; update MDO and exit
1447 Register mdo = klass_RInfo;
1448 __ mov_metadata(mdo, md->constant_encoding());
1449 Address data_addr
1450 = __ form_address(rscratch2, mdo,
1451 md->byte_offset_of_slot(data, DataLayout::flags_offset()),
1452 0);
1453 __ ldrb(rscratch1, data_addr);
1454 __ orr(rscratch1, rscratch1, BitData::null_seen_byte_constant());
1455 __ strb(rscratch1, data_addr);
1456 __ b(done);
1457 __ bind(not_null);
1458 } else {
1459 __ cbz(value, done);
1460 }
1461
1462 add_debug_info_for_null_check_here(op->info_for_exception());
1463 __ load_klass(k_RInfo, array);
1464 __ load_klass(klass_RInfo, value);
1465
1466 // get instance klass (it's already uncompressed)
1467 __ ldr(k_RInfo, Address(k_RInfo, ObjArrayKlass::element_klass_offset()));
1468 // perform the fast part of the checking logic
1469 __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, nullptr);
1470 // call out-of-line instance of __ check_klass_subtype_slow_path(...):
1471 __ stp(klass_RInfo, k_RInfo, Address(__ pre(sp, -2 * wordSize)));
1472 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
1473 __ ldp(k_RInfo, klass_RInfo, Address(__ post(sp, 2 * wordSize)));
1474 // result is a boolean
1475 __ cbzw(k_RInfo, *failure_target);
1476 // fall through to the success case
1477
1478 if (should_profile) {
1479 Register mdo = klass_RInfo, recv = k_RInfo;
1480 __ bind(profile_cast_success);
1481 __ mov_metadata(mdo, md->constant_encoding());
1482 __ load_klass(recv, value);
1483 Label update_done;
1484 type_profile_helper(mdo, md, data, recv, &done);
1485 __ b(done);
1486
1487 __ bind(profile_cast_failure);
1488 __ mov_metadata(mdo, md->constant_encoding());
1489 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
1490 __ lea(rscratch2, counter_addr);
1491 __ ldr(rscratch1, Address(rscratch2));
1492 __ sub(rscratch1, rscratch1, DataLayout::counter_increment);
1493 __ str(rscratch1, Address(rscratch2));
1494 __ b(*stub->entry());
1495 }
1496
1497 __ bind(done);
1498 } else if (code == lir_checkcast) {
1499 Register obj = op->object()->as_register();
1500 Register dst = op->result_opr()->as_register();
1501 Label success;
1502 emit_typecheck_helper(op, &success, op->stub()->entry(), &success);
1503 __ bind(success);
1504 if (dst != obj) {
1505 __ mov(dst, obj);
1506 }
1507 } else if (code == lir_instanceof) {
1508 Register obj = op->object()->as_register();
1509 Register dst = op->result_opr()->as_register();
1510 Label success, failure, done;
1511 emit_typecheck_helper(op, &success, &failure, &failure);
1512 __ bind(failure);
1513 __ mov(dst, zr);
1514 __ b(done);
1515 __ bind(success);
1516 __ mov(dst, 1);
1517 __ bind(done);
1518 } else {
1519 ShouldNotReachHere();
1520 }
1521 }
1522
1523 void LIR_Assembler::casw(Register addr, Register newval, Register cmpval) {
1524 __ cmpxchg(addr, cmpval, newval, Assembler::word, /* acquire*/ true, /* release*/ true, /* weak*/ false, rscratch1);
1525 __ cset(rscratch1, Assembler::NE);
1526 __ membar(__ AnyAny);
1527 }
1528
1529 void LIR_Assembler::casl(Register addr, Register newval, Register cmpval) {
1530 __ cmpxchg(addr, cmpval, newval, Assembler::xword, /* acquire*/ true, /* release*/ true, /* weak*/ false, rscratch1);
1531 __ cset(rscratch1, Assembler::NE);
1532 __ membar(__ AnyAny);
1533 }
1534
1535
1536 void LIR_Assembler::emit_compare_and_swap(LIR_OpCompareAndSwap* op) {
1537 assert(VM_Version::supports_cx8(), "wrong machine");
1538 Register addr;
1539 if (op->addr()->is_register()) {
1540 addr = as_reg(op->addr());
1541 } else {
1542 assert(op->addr()->is_address(), "what else?");
1543 LIR_Address* addr_ptr = op->addr()->as_address_ptr();
1544 assert(addr_ptr->disp() == 0, "need 0 disp");
1545 assert(addr_ptr->index() == LIR_Opr::illegalOpr(), "need 0 index");
1546 addr = as_reg(addr_ptr->base());
1547 }
1548 Register newval = as_reg(op->new_value());
1549 Register cmpval = as_reg(op->cmp_value());
1550
1551 if (op->code() == lir_cas_obj) {
1552 if (UseCompressedOops) {
1553 Register t1 = op->tmp1()->as_register();
1554 assert(op->tmp1()->is_valid(), "must be");
1555 __ encode_heap_oop(t1, cmpval);
1556 cmpval = t1;
1557 __ encode_heap_oop(rscratch2, newval);
1558 newval = rscratch2;
1559 casw(addr, newval, cmpval);
1560 } else {
1561 casl(addr, newval, cmpval);
1562 }
1563 } else if (op->code() == lir_cas_int) {
1564 casw(addr, newval, cmpval);
1565 } else {
1566 casl(addr, newval, cmpval);
1567 }
1568 }
1569
1570
1571 void LIR_Assembler::cmove(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Opr result, BasicType type,
1572 LIR_Opr cmp_opr1, LIR_Opr cmp_opr2) {
1573 assert(cmp_opr1 == LIR_OprFact::illegalOpr && cmp_opr2 == LIR_OprFact::illegalOpr, "unnecessary cmp oprs on aarch64");
1574
1575 Assembler::Condition acond, ncond;
1576 switch (condition) {
1577 case lir_cond_equal: acond = Assembler::EQ; ncond = Assembler::NE; break;
1578 case lir_cond_notEqual: acond = Assembler::NE; ncond = Assembler::EQ; break;
1579 case lir_cond_less: acond = Assembler::LT; ncond = Assembler::GE; break;
1580 case lir_cond_lessEqual: acond = Assembler::LE; ncond = Assembler::GT; break;
1581 case lir_cond_greaterEqual: acond = Assembler::GE; ncond = Assembler::LT; break;
1582 case lir_cond_greater: acond = Assembler::GT; ncond = Assembler::LE; break;
1583 case lir_cond_belowEqual:
1584 case lir_cond_aboveEqual:
1585 default: ShouldNotReachHere();
1586 acond = Assembler::EQ; ncond = Assembler::NE; // unreachable
1587 }
1588
1589 assert(result->is_single_cpu() || result->is_double_cpu(),
1590 "expect single register for result");
1591 if (opr1->is_constant() && opr2->is_constant()
1592 && opr1->type() == T_INT && opr2->type() == T_INT) {
1593 jint val1 = opr1->as_jint();
1594 jint val2 = opr2->as_jint();
1595 if (val1 == 0 && val2 == 1) {
1596 __ cset(result->as_register(), ncond);
1597 return;
1598 } else if (val1 == 1 && val2 == 0) {
1599 __ cset(result->as_register(), acond);
1600 return;
1601 }
1602 }
1603
1604 if (opr1->is_constant() && opr2->is_constant()
1605 && opr1->type() == T_LONG && opr2->type() == T_LONG) {
1606 jlong val1 = opr1->as_jlong();
1607 jlong val2 = opr2->as_jlong();
1608 if (val1 == 0 && val2 == 1) {
1609 __ cset(result->as_register_lo(), ncond);
1610 return;
1611 } else if (val1 == 1 && val2 == 0) {
1612 __ cset(result->as_register_lo(), acond);
1613 return;
1614 }
1615 }
1616
1617 if (opr1->is_stack()) {
1618 stack2reg(opr1, FrameMap::rscratch1_opr, result->type());
1619 opr1 = FrameMap::rscratch1_opr;
1620 } else if (opr1->is_constant()) {
1621 LIR_Opr tmp
1622 = opr1->type() == T_LONG ? FrameMap::rscratch1_long_opr : FrameMap::rscratch1_opr;
1623 const2reg(opr1, tmp, lir_patch_none, nullptr);
1624 opr1 = tmp;
1625 }
1626
1627 if (opr2->is_stack()) {
1628 stack2reg(opr2, FrameMap::rscratch2_opr, result->type());
1629 opr2 = FrameMap::rscratch2_opr;
1630 } else if (opr2->is_constant()) {
1631 LIR_Opr tmp
1632 = opr2->type() == T_LONG ? FrameMap::rscratch2_long_opr : FrameMap::rscratch2_opr;
1633 const2reg(opr2, tmp, lir_patch_none, nullptr);
1634 opr2 = tmp;
1635 }
1636
1637 if (result->type() == T_LONG)
1638 __ csel(result->as_register_lo(), opr1->as_register_lo(), opr2->as_register_lo(), acond);
1639 else
1640 __ csel(result->as_register(), opr1->as_register(), opr2->as_register(), acond);
1641 }
1642
1643 void LIR_Assembler::arith_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dest, CodeEmitInfo* info, bool pop_fpu_stack) {
1644 assert(info == nullptr, "should never be used, idiv/irem and ldiv/lrem not handled by this method");
1645
1646 if (left->is_single_cpu()) {
1647 Register lreg = left->as_register();
1648 Register dreg = as_reg(dest);
1649
1650 if (right->is_single_cpu()) {
1651 // cpu register - cpu register
1652
1653 assert(left->type() == T_INT && right->type() == T_INT && dest->type() == T_INT,
1654 "should be");
1655 Register rreg = right->as_register();
1656 switch (code) {
1657 case lir_add: __ addw (dest->as_register(), lreg, rreg); break;
1658 case lir_sub: __ subw (dest->as_register(), lreg, rreg); break;
1659 case lir_mul: __ mulw (dest->as_register(), lreg, rreg); break;
1660 default: ShouldNotReachHere();
1661 }
1662
1663 } else if (right->is_double_cpu()) {
1664 Register rreg = right->as_register_lo();
1665 // single_cpu + double_cpu: can happen with obj+long
1666 assert(code == lir_add || code == lir_sub, "mismatched arithmetic op");
1667 switch (code) {
1668 case lir_add: __ add(dreg, lreg, rreg); break;
1669 case lir_sub: __ sub(dreg, lreg, rreg); break;
1670 default: ShouldNotReachHere();
1671 }
1672 } else if (right->is_constant()) {
1673 // cpu register - constant
1674 jlong c;
1675
1676 // FIXME. This is fugly: we really need to factor all this logic.
1677 switch(right->type()) {
1678 case T_LONG:
1679 c = right->as_constant_ptr()->as_jlong();
1680 break;
1681 case T_INT:
1682 case T_ADDRESS:
1683 c = right->as_constant_ptr()->as_jint();
1684 break;
1685 default:
1686 ShouldNotReachHere();
1687 c = 0; // unreachable
1688 break;
1689 }
1690
1691 assert(code == lir_add || code == lir_sub, "mismatched arithmetic op");
1692 if (c == 0 && dreg == lreg) {
1693 COMMENT("effective nop elided");
1694 return;
1695 }
1696 switch(left->type()) {
1697 case T_INT:
1698 switch (code) {
1699 case lir_add: __ addw(dreg, lreg, c); break;
1700 case lir_sub: __ subw(dreg, lreg, c); break;
1701 default: ShouldNotReachHere();
1702 }
1703 break;
1704 case T_OBJECT:
1705 case T_ADDRESS:
1706 switch (code) {
1707 case lir_add: __ add(dreg, lreg, c); break;
1708 case lir_sub: __ sub(dreg, lreg, c); break;
1709 default: ShouldNotReachHere();
1710 }
1711 break;
1712 default:
1713 ShouldNotReachHere();
1714 }
1715 } else {
1716 ShouldNotReachHere();
1717 }
1718
1719 } else if (left->is_double_cpu()) {
1720 Register lreg_lo = left->as_register_lo();
1721
1722 if (right->is_double_cpu()) {
1723 // cpu register - cpu register
1724 Register rreg_lo = right->as_register_lo();
1725 switch (code) {
1726 case lir_add: __ add (dest->as_register_lo(), lreg_lo, rreg_lo); break;
1727 case lir_sub: __ sub (dest->as_register_lo(), lreg_lo, rreg_lo); break;
1728 case lir_mul: __ mul (dest->as_register_lo(), lreg_lo, rreg_lo); break;
1729 case lir_div: __ corrected_idivq(dest->as_register_lo(), lreg_lo, rreg_lo, false, rscratch1); break;
1730 case lir_rem: __ corrected_idivq(dest->as_register_lo(), lreg_lo, rreg_lo, true, rscratch1); break;
1731 default:
1732 ShouldNotReachHere();
1733 }
1734
1735 } else if (right->is_constant()) {
1736 jlong c = right->as_constant_ptr()->as_jlong();
1737 Register dreg = as_reg(dest);
1738 switch (code) {
1739 case lir_add:
1740 case lir_sub:
1741 if (c == 0 && dreg == lreg_lo) {
1742 COMMENT("effective nop elided");
1743 return;
1744 }
1745 code == lir_add ? __ add(dreg, lreg_lo, c) : __ sub(dreg, lreg_lo, c);
1746 break;
1747 case lir_div:
1748 assert(c > 0 && is_power_of_2(c), "divisor must be power-of-2 constant");
1749 if (c == 1) {
1750 // move lreg_lo to dreg if divisor is 1
1751 __ mov(dreg, lreg_lo);
1752 } else {
1753 unsigned int shift = log2i_exact(c);
1754 // use rscratch1 as intermediate result register
1755 __ asr(rscratch1, lreg_lo, 63);
1756 __ add(rscratch1, lreg_lo, rscratch1, Assembler::LSR, 64 - shift);
1757 __ asr(dreg, rscratch1, shift);
1758 }
1759 break;
1760 case lir_rem:
1761 assert(c > 0 && is_power_of_2(c), "divisor must be power-of-2 constant");
1762 if (c == 1) {
1763 // move 0 to dreg if divisor is 1
1764 __ mov(dreg, zr);
1765 } else {
1766 // use rscratch1 as intermediate result register
1767 __ negs(rscratch1, lreg_lo);
1768 __ andr(dreg, lreg_lo, c - 1);
1769 __ andr(rscratch1, rscratch1, c - 1);
1770 __ csneg(dreg, dreg, rscratch1, Assembler::MI);
1771 }
1772 break;
1773 default:
1774 ShouldNotReachHere();
1775 }
1776 } else {
1777 ShouldNotReachHere();
1778 }
1779 } else if (left->is_single_fpu()) {
1780 assert(right->is_single_fpu(), "right hand side of float arithmetics needs to be float register");
1781 switch (code) {
1782 case lir_add: __ fadds (dest->as_float_reg(), left->as_float_reg(), right->as_float_reg()); break;
1783 case lir_sub: __ fsubs (dest->as_float_reg(), left->as_float_reg(), right->as_float_reg()); break;
1784 case lir_mul: __ fmuls (dest->as_float_reg(), left->as_float_reg(), right->as_float_reg()); break;
1785 case lir_div: __ fdivs (dest->as_float_reg(), left->as_float_reg(), right->as_float_reg()); break;
1786 default:
1787 ShouldNotReachHere();
1788 }
1789 } else if (left->is_double_fpu()) {
1790 if (right->is_double_fpu()) {
1791 // fpu register - fpu register
1792 switch (code) {
1793 case lir_add: __ faddd (dest->as_double_reg(), left->as_double_reg(), right->as_double_reg()); break;
1794 case lir_sub: __ fsubd (dest->as_double_reg(), left->as_double_reg(), right->as_double_reg()); break;
1795 case lir_mul: __ fmuld (dest->as_double_reg(), left->as_double_reg(), right->as_double_reg()); break;
1796 case lir_div: __ fdivd (dest->as_double_reg(), left->as_double_reg(), right->as_double_reg()); break;
1797 default:
1798 ShouldNotReachHere();
1799 }
1800 } else {
1801 if (right->is_constant()) {
1802 ShouldNotReachHere();
1803 }
1804 ShouldNotReachHere();
1805 }
1806 } else if (left->is_single_stack() || left->is_address()) {
1807 assert(left == dest, "left and dest must be equal");
1808 ShouldNotReachHere();
1809 } else {
1810 ShouldNotReachHere();
1811 }
1812 }
1813
1814 void LIR_Assembler::arith_fpu_implementation(LIR_Code code, int left_index, int right_index, int dest_index, bool pop_fpu_stack) { Unimplemented(); }
1815
1816
1817 void LIR_Assembler::intrinsic_op(LIR_Code code, LIR_Opr value, LIR_Opr tmp, LIR_Opr dest, LIR_Op* op) {
1818 switch(code) {
1819 case lir_abs : __ fabsd(dest->as_double_reg(), value->as_double_reg()); break;
1820 case lir_sqrt: __ fsqrtd(dest->as_double_reg(), value->as_double_reg()); break;
1821 case lir_f2hf: __ flt_to_flt16(dest->as_register(), value->as_float_reg(), tmp->as_float_reg()); break;
1822 case lir_hf2f: __ flt16_to_flt(dest->as_float_reg(), value->as_register(), tmp->as_float_reg()); break;
1823 default : ShouldNotReachHere();
1824 }
1825 }
1826
1827 void LIR_Assembler::logic_op(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst) {
1828
1829 assert(left->is_single_cpu() || left->is_double_cpu(), "expect single or double register");
1830 Register Rleft = left->is_single_cpu() ? left->as_register() :
1831 left->as_register_lo();
1832 if (dst->is_single_cpu()) {
1833 Register Rdst = dst->as_register();
1834 if (right->is_constant()) {
1835 switch (code) {
1836 case lir_logic_and: __ andw (Rdst, Rleft, right->as_jint()); break;
1837 case lir_logic_or: __ orrw (Rdst, Rleft, right->as_jint()); break;
1838 case lir_logic_xor: __ eorw (Rdst, Rleft, right->as_jint()); break;
1839 default: ShouldNotReachHere(); break;
1840 }
1841 } else {
1842 Register Rright = right->is_single_cpu() ? right->as_register() :
1843 right->as_register_lo();
1844 switch (code) {
1845 case lir_logic_and: __ andw (Rdst, Rleft, Rright); break;
1846 case lir_logic_or: __ orrw (Rdst, Rleft, Rright); break;
1847 case lir_logic_xor: __ eorw (Rdst, Rleft, Rright); break;
1848 default: ShouldNotReachHere(); break;
1849 }
1850 }
1851 } else {
1852 Register Rdst = dst->as_register_lo();
1853 if (right->is_constant()) {
1854 switch (code) {
1855 case lir_logic_and: __ andr (Rdst, Rleft, right->as_jlong()); break;
1856 case lir_logic_or: __ orr (Rdst, Rleft, right->as_jlong()); break;
1857 case lir_logic_xor: __ eor (Rdst, Rleft, right->as_jlong()); break;
1858 default: ShouldNotReachHere(); break;
1859 }
1860 } else {
1861 Register Rright = right->is_single_cpu() ? right->as_register() :
1862 right->as_register_lo();
1863 switch (code) {
1864 case lir_logic_and: __ andr (Rdst, Rleft, Rright); break;
1865 case lir_logic_or: __ orr (Rdst, Rleft, Rright); break;
1866 case lir_logic_xor: __ eor (Rdst, Rleft, Rright); break;
1867 default: ShouldNotReachHere(); break;
1868 }
1869 }
1870 }
1871 }
1872
1873
1874
1875 void LIR_Assembler::arithmetic_idiv(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr illegal, LIR_Opr result, CodeEmitInfo* info) {
1876
1877 // opcode check
1878 assert((code == lir_idiv) || (code == lir_irem), "opcode must be idiv or irem");
1879 bool is_irem = (code == lir_irem);
1880
1881 // operand check
1882 assert(left->is_single_cpu(), "left must be register");
1883 assert(right->is_single_cpu() || right->is_constant(), "right must be register or constant");
1884 assert(result->is_single_cpu(), "result must be register");
1885 Register lreg = left->as_register();
1886 Register dreg = result->as_register();
1887
1888 // power-of-2 constant check and codegen
1889 if (right->is_constant()) {
1890 int c = right->as_constant_ptr()->as_jint();
1891 assert(c > 0 && is_power_of_2(c), "divisor must be power-of-2 constant");
1892 if (is_irem) {
1893 if (c == 1) {
1894 // move 0 to dreg if divisor is 1
1895 __ movw(dreg, zr);
1896 } else {
1897 // use rscratch1 as intermediate result register
1898 __ negsw(rscratch1, lreg);
1899 __ andw(dreg, lreg, c - 1);
1900 __ andw(rscratch1, rscratch1, c - 1);
1901 __ csnegw(dreg, dreg, rscratch1, Assembler::MI);
1902 }
1903 } else {
1904 if (c == 1) {
1905 // move lreg to dreg if divisor is 1
1906 __ movw(dreg, lreg);
1907 } else {
1908 unsigned int shift = exact_log2(c);
1909 // use rscratch1 as intermediate result register
1910 __ asrw(rscratch1, lreg, 31);
1911 __ addw(rscratch1, lreg, rscratch1, Assembler::LSR, 32 - shift);
1912 __ asrw(dreg, rscratch1, shift);
1913 }
1914 }
1915 } else {
1916 Register rreg = right->as_register();
1917 __ corrected_idivl(dreg, lreg, rreg, is_irem, rscratch1);
1918 }
1919 }
1920
1921
1922 void LIR_Assembler::comp_op(LIR_Condition condition, LIR_Opr opr1, LIR_Opr opr2, LIR_Op2* op) {
1923 if (opr1->is_constant() && opr2->is_single_cpu()) {
1924 // tableswitch
1925 Register reg = as_reg(opr2);
1926 struct tableswitch &table = switches[opr1->as_constant_ptr()->as_jint()];
1927 __ tableswitch(reg, table._first_key, table._last_key, table._branches, table._after);
1928 } else if (opr1->is_single_cpu() || opr1->is_double_cpu()) {
1929 Register reg1 = as_reg(opr1);
1930 if (opr2->is_single_cpu()) {
1931 // cpu register - cpu register
1932 Register reg2 = opr2->as_register();
1933 if (is_reference_type(opr1->type())) {
1934 __ cmpoop(reg1, reg2);
1935 } else {
1936 assert(!is_reference_type(opr2->type()), "cmp int, oop?");
1937 __ cmpw(reg1, reg2);
1938 }
1939 return;
1940 }
1941 if (opr2->is_double_cpu()) {
1942 // cpu register - cpu register
1943 Register reg2 = opr2->as_register_lo();
1944 __ cmp(reg1, reg2);
1945 return;
1946 }
1947
1948 if (opr2->is_constant()) {
1949 bool is_32bit = false; // width of register operand
1950 jlong imm;
1951
1952 switch(opr2->type()) {
1953 case T_INT:
1954 imm = opr2->as_constant_ptr()->as_jint();
1955 is_32bit = true;
1956 break;
1957 case T_LONG:
1958 imm = opr2->as_constant_ptr()->as_jlong();
1959 break;
1960 case T_ADDRESS:
1961 imm = opr2->as_constant_ptr()->as_jint();
1962 break;
1963 case T_METADATA:
1964 imm = (intptr_t)(opr2->as_constant_ptr()->as_metadata());
1965 break;
1966 case T_OBJECT:
1967 case T_ARRAY:
1968 jobject2reg(opr2->as_constant_ptr()->as_jobject(), rscratch1);
1969 __ cmpoop(reg1, rscratch1);
1970 return;
1971 default:
1972 ShouldNotReachHere();
1973 imm = 0; // unreachable
1974 break;
1975 }
1976
1977 if (Assembler::operand_valid_for_add_sub_immediate(imm)) {
1978 if (is_32bit)
1979 __ cmpw(reg1, imm);
1980 else
1981 __ subs(zr, reg1, imm);
1982 return;
1983 } else {
1984 __ mov(rscratch1, imm);
1985 if (is_32bit)
1986 __ cmpw(reg1, rscratch1);
1987 else
1988 __ cmp(reg1, rscratch1);
1989 return;
1990 }
1991 } else
1992 ShouldNotReachHere();
1993 } else if (opr1->is_single_fpu()) {
1994 FloatRegister reg1 = opr1->as_float_reg();
1995 assert(opr2->is_single_fpu(), "expect single float register");
1996 FloatRegister reg2 = opr2->as_float_reg();
1997 __ fcmps(reg1, reg2);
1998 } else if (opr1->is_double_fpu()) {
1999 FloatRegister reg1 = opr1->as_double_reg();
2000 assert(opr2->is_double_fpu(), "expect double float register");
2001 FloatRegister reg2 = opr2->as_double_reg();
2002 __ fcmpd(reg1, reg2);
2003 } else {
2004 ShouldNotReachHere();
2005 }
2006 }
2007
2008 void LIR_Assembler::comp_fl2i(LIR_Code code, LIR_Opr left, LIR_Opr right, LIR_Opr dst, LIR_Op2* op){
2009 if (code == lir_cmp_fd2i || code == lir_ucmp_fd2i) {
2010 bool is_unordered_less = (code == lir_ucmp_fd2i);
2011 if (left->is_single_fpu()) {
2012 __ float_cmp(true, is_unordered_less ? -1 : 1, left->as_float_reg(), right->as_float_reg(), dst->as_register());
2013 } else if (left->is_double_fpu()) {
2014 __ float_cmp(false, is_unordered_less ? -1 : 1, left->as_double_reg(), right->as_double_reg(), dst->as_register());
2015 } else {
2016 ShouldNotReachHere();
2017 }
2018 } else if (code == lir_cmp_l2i) {
2019 Label done;
2020 __ cmp(left->as_register_lo(), right->as_register_lo());
2021 __ mov(dst->as_register(), (uint64_t)-1L);
2022 __ br(Assembler::LT, done);
2023 __ csinc(dst->as_register(), zr, zr, Assembler::EQ);
2024 __ bind(done);
2025 } else {
2026 ShouldNotReachHere();
2027 }
2028 }
2029
2030
2031 void LIR_Assembler::align_call(LIR_Code code) { }
2032
2033
2034 void LIR_Assembler::call(LIR_OpJavaCall* op, relocInfo::relocType rtype) {
2035 address call = __ trampoline_call(Address(op->addr(), rtype));
2036 if (call == nullptr) {
2037 bailout("trampoline stub overflow");
2038 return;
2039 }
2040 add_call_info(code_offset(), op->info());
2041 __ post_call_nop();
2042 }
2043
2044
2045 void LIR_Assembler::ic_call(LIR_OpJavaCall* op) {
2046 address call = __ ic_call(op->addr());
2047 if (call == nullptr) {
2048 bailout("trampoline stub overflow");
2049 return;
2050 }
2051 add_call_info(code_offset(), op->info());
2052 __ post_call_nop();
2053 }
2054
2055 void LIR_Assembler::emit_static_call_stub() {
2056 address call_pc = __ pc();
2057 address stub = __ start_a_stub(call_stub_size());
2058 if (stub == nullptr) {
2059 bailout("static call stub overflow");
2060 return;
2061 }
2062
2063 int start = __ offset();
2064
2065 __ relocate(static_stub_Relocation::spec(call_pc));
2066 __ emit_static_call_stub();
2067
2068 assert(__ offset() - start + CompiledStaticCall::to_trampoline_stub_size()
2069 <= call_stub_size(), "stub too big");
2070 __ end_a_stub();
2071 }
2072
2073
2074 void LIR_Assembler::throw_op(LIR_Opr exceptionPC, LIR_Opr exceptionOop, CodeEmitInfo* info) {
2075 assert(exceptionOop->as_register() == r0, "must match");
2076 assert(exceptionPC->as_register() == r3, "must match");
2077
2078 // exception object is not added to oop map by LinearScan
2079 // (LinearScan assumes that no oops are in fixed registers)
2080 info->add_register_oop(exceptionOop);
2081 Runtime1::StubID unwind_id;
2082
2083 // get current pc information
2084 // pc is only needed if the method has an exception handler, the unwind code does not need it.
2085 if (compilation()->debug_info_recorder()->last_pc_offset() == __ offset()) {
2086 // As no instructions have been generated yet for this LIR node it's
2087 // possible that an oop map already exists for the current offset.
2088 // In that case insert an dummy NOP here to ensure all oop map PCs
2089 // are unique. See JDK-8237483.
2090 __ nop();
2091 }
2092 int pc_for_athrow_offset = __ offset();
2093 InternalAddress pc_for_athrow(__ pc());
2094 __ adr(exceptionPC->as_register(), pc_for_athrow);
2095 add_call_info(pc_for_athrow_offset, info); // for exception handler
2096
2097 __ verify_not_null_oop(r0);
2098 // search an exception handler (r0: exception oop, r3: throwing pc)
2099 if (compilation()->has_fpu_code()) {
2100 unwind_id = Runtime1::handle_exception_id;
2101 } else {
2102 unwind_id = Runtime1::handle_exception_nofpu_id;
2103 }
2104 __ far_call(RuntimeAddress(Runtime1::entry_for(unwind_id)));
2105
2106 // FIXME: enough room for two byte trap ????
2107 __ nop();
2108 }
2109
2110
2111 void LIR_Assembler::unwind_op(LIR_Opr exceptionOop) {
2112 assert(exceptionOop->as_register() == r0, "must match");
2113
2114 __ b(_unwind_handler_entry);
2115 }
2116
2117
2118 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, LIR_Opr count, LIR_Opr dest, LIR_Opr tmp) {
2119 Register lreg = left->is_single_cpu() ? left->as_register() : left->as_register_lo();
2120 Register dreg = dest->is_single_cpu() ? dest->as_register() : dest->as_register_lo();
2121
2122 switch (left->type()) {
2123 case T_INT: {
2124 switch (code) {
2125 case lir_shl: __ lslvw (dreg, lreg, count->as_register()); break;
2126 case lir_shr: __ asrvw (dreg, lreg, count->as_register()); break;
2127 case lir_ushr: __ lsrvw (dreg, lreg, count->as_register()); break;
2128 default:
2129 ShouldNotReachHere();
2130 break;
2131 }
2132 break;
2133 case T_LONG:
2134 case T_ADDRESS:
2135 case T_OBJECT:
2136 switch (code) {
2137 case lir_shl: __ lslv (dreg, lreg, count->as_register()); break;
2138 case lir_shr: __ asrv (dreg, lreg, count->as_register()); break;
2139 case lir_ushr: __ lsrv (dreg, lreg, count->as_register()); break;
2140 default:
2141 ShouldNotReachHere();
2142 break;
2143 }
2144 break;
2145 default:
2146 ShouldNotReachHere();
2147 break;
2148 }
2149 }
2150 }
2151
2152
2153 void LIR_Assembler::shift_op(LIR_Code code, LIR_Opr left, jint count, LIR_Opr dest) {
2154 Register dreg = dest->is_single_cpu() ? dest->as_register() : dest->as_register_lo();
2155 Register lreg = left->is_single_cpu() ? left->as_register() : left->as_register_lo();
2156
2157 switch (left->type()) {
2158 case T_INT: {
2159 switch (code) {
2160 case lir_shl: __ lslw (dreg, lreg, count); break;
2161 case lir_shr: __ asrw (dreg, lreg, count); break;
2162 case lir_ushr: __ lsrw (dreg, lreg, count); break;
2163 default:
2164 ShouldNotReachHere();
2165 break;
2166 }
2167 break;
2168 case T_LONG:
2169 case T_ADDRESS:
2170 case T_OBJECT:
2171 switch (code) {
2172 case lir_shl: __ lsl (dreg, lreg, count); break;
2173 case lir_shr: __ asr (dreg, lreg, count); break;
2174 case lir_ushr: __ lsr (dreg, lreg, count); break;
2175 default:
2176 ShouldNotReachHere();
2177 break;
2178 }
2179 break;
2180 default:
2181 ShouldNotReachHere();
2182 break;
2183 }
2184 }
2185 }
2186
2187
2188 void LIR_Assembler::store_parameter(Register r, int offset_from_rsp_in_words) {
2189 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
2190 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
2191 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
2192 __ str (r, Address(sp, offset_from_rsp_in_bytes));
2193 }
2194
2195
2196 void LIR_Assembler::store_parameter(jint c, int offset_from_rsp_in_words) {
2197 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
2198 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
2199 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
2200 __ mov (rscratch1, c);
2201 __ str (rscratch1, Address(sp, offset_from_rsp_in_bytes));
2202 }
2203
2204
2205 void LIR_Assembler::store_parameter(jobject o, int offset_from_rsp_in_words) {
2206 ShouldNotReachHere();
2207 assert(offset_from_rsp_in_words >= 0, "invalid offset from rsp");
2208 int offset_from_rsp_in_bytes = offset_from_rsp_in_words * BytesPerWord;
2209 assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
2210 __ lea(rscratch1, __ constant_oop_address(o));
2211 __ str(rscratch1, Address(sp, offset_from_rsp_in_bytes));
2212 }
2213
2214
2215 // This code replaces a call to arraycopy; no exception may
2216 // be thrown in this code, they must be thrown in the System.arraycopy
2217 // activation frame; we could save some checks if this would not be the case
2218 void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) {
2219 ciArrayKlass* default_type = op->expected_type();
2220 Register src = op->src()->as_register();
2221 Register dst = op->dst()->as_register();
2222 Register src_pos = op->src_pos()->as_register();
2223 Register dst_pos = op->dst_pos()->as_register();
2224 Register length = op->length()->as_register();
2225 Register tmp = op->tmp()->as_register();
2226
2227 CodeStub* stub = op->stub();
2228 int flags = op->flags();
2229 BasicType basic_type = default_type != nullptr ? default_type->element_type()->basic_type() : T_ILLEGAL;
2230 if (is_reference_type(basic_type)) basic_type = T_OBJECT;
2231
2232 // if we don't know anything, just go through the generic arraycopy
2233 if (default_type == nullptr // || basic_type == T_OBJECT
2234 ) {
2235 Label done;
2236 assert(src == r1 && src_pos == r2, "mismatch in calling convention");
2237
2238 // Save the arguments in case the generic arraycopy fails and we
2239 // have to fall back to the JNI stub
2240 __ stp(dst, dst_pos, Address(sp, 0*BytesPerWord));
2241 __ stp(length, src_pos, Address(sp, 2*BytesPerWord));
2242 __ str(src, Address(sp, 4*BytesPerWord));
2243
2244 address copyfunc_addr = StubRoutines::generic_arraycopy();
2245 assert(copyfunc_addr != nullptr, "generic arraycopy stub required");
2246
2247 // The arguments are in java calling convention so we shift them
2248 // to C convention
2249 assert_different_registers(c_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4);
2250 __ mov(c_rarg0, j_rarg0);
2251 assert_different_registers(c_rarg1, j_rarg2, j_rarg3, j_rarg4);
2252 __ mov(c_rarg1, j_rarg1);
2253 assert_different_registers(c_rarg2, j_rarg3, j_rarg4);
2254 __ mov(c_rarg2, j_rarg2);
2255 assert_different_registers(c_rarg3, j_rarg4);
2256 __ mov(c_rarg3, j_rarg3);
2257 __ mov(c_rarg4, j_rarg4);
2258 #ifndef PRODUCT
2259 if (PrintC1Statistics) {
2260 __ incrementw(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt));
2261 }
2262 #endif
2263 __ far_call(RuntimeAddress(copyfunc_addr));
2264
2265 __ cbz(r0, *stub->continuation());
2266
2267 // Reload values from the stack so they are where the stub
2268 // expects them.
2269 __ ldp(dst, dst_pos, Address(sp, 0*BytesPerWord));
2270 __ ldp(length, src_pos, Address(sp, 2*BytesPerWord));
2271 __ ldr(src, Address(sp, 4*BytesPerWord));
2272
2273 // r0 is -1^K where K == partial copied count
2274 __ eonw(rscratch1, r0, zr);
2275 // adjust length down and src/end pos up by partial copied count
2276 __ subw(length, length, rscratch1);
2277 __ addw(src_pos, src_pos, rscratch1);
2278 __ addw(dst_pos, dst_pos, rscratch1);
2279 __ b(*stub->entry());
2280
2281 __ bind(*stub->continuation());
2282 return;
2283 }
2284
2285 assert(default_type != nullptr && default_type->is_array_klass() && default_type->is_loaded(), "must be true at this point");
2286
2287 int elem_size = type2aelembytes(basic_type);
2288 int scale = exact_log2(elem_size);
2289
2290 Address src_length_addr = Address(src, arrayOopDesc::length_offset_in_bytes());
2291 Address dst_length_addr = Address(dst, arrayOopDesc::length_offset_in_bytes());
2292 Address src_klass_addr = Address(src, oopDesc::klass_offset_in_bytes());
2293 Address dst_klass_addr = Address(dst, oopDesc::klass_offset_in_bytes());
2294
2295 // test for null
2296 if (flags & LIR_OpArrayCopy::src_null_check) {
2297 __ cbz(src, *stub->entry());
2298 }
2299 if (flags & LIR_OpArrayCopy::dst_null_check) {
2300 __ cbz(dst, *stub->entry());
2301 }
2302
2303 // If the compiler was not able to prove that exact type of the source or the destination
2304 // of the arraycopy is an array type, check at runtime if the source or the destination is
2305 // an instance type.
2306 if (flags & LIR_OpArrayCopy::type_check) {
2307 if (!(flags & LIR_OpArrayCopy::LIR_OpArrayCopy::dst_objarray)) {
2308 __ load_klass(tmp, dst);
2309 __ ldrw(rscratch1, Address(tmp, in_bytes(Klass::layout_helper_offset())));
2310 __ cmpw(rscratch1, Klass::_lh_neutral_value);
2311 __ br(Assembler::GE, *stub->entry());
2312 }
2313
2314 if (!(flags & LIR_OpArrayCopy::LIR_OpArrayCopy::src_objarray)) {
2315 __ load_klass(tmp, src);
2316 __ ldrw(rscratch1, Address(tmp, in_bytes(Klass::layout_helper_offset())));
2317 __ cmpw(rscratch1, Klass::_lh_neutral_value);
2318 __ br(Assembler::GE, *stub->entry());
2319 }
2320 }
2321
2322 // check if negative
2323 if (flags & LIR_OpArrayCopy::src_pos_positive_check) {
2324 __ cmpw(src_pos, 0);
2325 __ br(Assembler::LT, *stub->entry());
2326 }
2327 if (flags & LIR_OpArrayCopy::dst_pos_positive_check) {
2328 __ cmpw(dst_pos, 0);
2329 __ br(Assembler::LT, *stub->entry());
2330 }
2331
2332 if (flags & LIR_OpArrayCopy::length_positive_check) {
2333 __ cmpw(length, 0);
2334 __ br(Assembler::LT, *stub->entry());
2335 }
2336
2337 if (flags & LIR_OpArrayCopy::src_range_check) {
2338 __ addw(tmp, src_pos, length);
2339 __ ldrw(rscratch1, src_length_addr);
2340 __ cmpw(tmp, rscratch1);
2341 __ br(Assembler::HI, *stub->entry());
2342 }
2343 if (flags & LIR_OpArrayCopy::dst_range_check) {
2344 __ addw(tmp, dst_pos, length);
2345 __ ldrw(rscratch1, dst_length_addr);
2346 __ cmpw(tmp, rscratch1);
2347 __ br(Assembler::HI, *stub->entry());
2348 }
2349
2350 if (flags & LIR_OpArrayCopy::type_check) {
2351 // We don't know the array types are compatible
2352 if (basic_type != T_OBJECT) {
2353 // Simple test for basic type arrays
2354 if (UseCompressedClassPointers) {
2355 __ load_nklass(tmp, src);
2356 __ load_nklass(rscratch1, dst);
2357 __ cmpw(tmp, rscratch1);
2358 } else {
2359 __ ldr(tmp, Address(src, oopDesc::klass_offset_in_bytes()));
2360 __ ldr(rscratch1, Address(dst, oopDesc::klass_offset_in_bytes()));
2361 __ cmp(tmp, rscratch1);
2362 }
2363 __ br(Assembler::NE, *stub->entry());
2364 } else {
2365 // For object arrays, if src is a sub class of dst then we can
2366 // safely do the copy.
2367 Label cont, slow;
2368
2369 #define PUSH(r1, r2) \
2370 stp(r1, r2, __ pre(sp, -2 * wordSize));
2371
2372 #define POP(r1, r2) \
2373 ldp(r1, r2, __ post(sp, 2 * wordSize));
2374
2375 __ PUSH(src, dst);
2376
2377 __ load_klass(src, src);
2378 __ load_klass(dst, dst);
2379
2380 __ check_klass_subtype_fast_path(src, dst, tmp, &cont, &slow, nullptr);
2381
2382 __ PUSH(src, dst);
2383 __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::slow_subtype_check_id)));
2384 __ POP(src, dst);
2385
2386 __ cbnz(src, cont);
2387
2388 __ bind(slow);
2389 __ POP(src, dst);
2390
2391 address copyfunc_addr = StubRoutines::checkcast_arraycopy();
2392 if (copyfunc_addr != nullptr) { // use stub if available
2393 // src is not a sub class of dst so we have to do a
2394 // per-element check.
2395
2396 int mask = LIR_OpArrayCopy::src_objarray|LIR_OpArrayCopy::dst_objarray;
2397 if ((flags & mask) != mask) {
2398 // Check that at least both of them object arrays.
2399 assert(flags & mask, "one of the two should be known to be an object array");
2400
2401 if (!(flags & LIR_OpArrayCopy::src_objarray)) {
2402 __ load_klass(tmp, src);
2403 } else if (!(flags & LIR_OpArrayCopy::dst_objarray)) {
2404 __ load_klass(tmp, dst);
2405 }
2406 int lh_offset = in_bytes(Klass::layout_helper_offset());
2407 Address klass_lh_addr(tmp, lh_offset);
2408 jint objArray_lh = Klass::array_layout_helper(T_OBJECT);
2409 __ ldrw(rscratch1, klass_lh_addr);
2410 __ mov(rscratch2, objArray_lh);
2411 __ eorw(rscratch1, rscratch1, rscratch2);
2412 __ cbnzw(rscratch1, *stub->entry());
2413 }
2414
2415 // Spill because stubs can use any register they like and it's
2416 // easier to restore just those that we care about.
2417 __ stp(dst, dst_pos, Address(sp, 0*BytesPerWord));
2418 __ stp(length, src_pos, Address(sp, 2*BytesPerWord));
2419 __ str(src, Address(sp, 4*BytesPerWord));
2420
2421 __ lea(c_rarg0, Address(src, src_pos, Address::uxtw(scale)));
2422 __ add(c_rarg0, c_rarg0, arrayOopDesc::base_offset_in_bytes(basic_type));
2423 assert_different_registers(c_rarg0, dst, dst_pos, length);
2424 __ lea(c_rarg1, Address(dst, dst_pos, Address::uxtw(scale)));
2425 __ add(c_rarg1, c_rarg1, arrayOopDesc::base_offset_in_bytes(basic_type));
2426 assert_different_registers(c_rarg1, dst, length);
2427 __ uxtw(c_rarg2, length);
2428 assert_different_registers(c_rarg2, dst);
2429
2430 __ load_klass(c_rarg4, dst);
2431 __ ldr(c_rarg4, Address(c_rarg4, ObjArrayKlass::element_klass_offset()));
2432 __ ldrw(c_rarg3, Address(c_rarg4, Klass::super_check_offset_offset()));
2433 __ far_call(RuntimeAddress(copyfunc_addr));
2434
2435 #ifndef PRODUCT
2436 if (PrintC1Statistics) {
2437 Label failed;
2438 __ cbnz(r0, failed);
2439 __ incrementw(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_cnt));
2440 __ bind(failed);
2441 }
2442 #endif
2443
2444 __ cbz(r0, *stub->continuation());
2445
2446 #ifndef PRODUCT
2447 if (PrintC1Statistics) {
2448 __ incrementw(ExternalAddress((address)&Runtime1::_arraycopy_checkcast_attempt_cnt));
2449 }
2450 #endif
2451 assert_different_registers(dst, dst_pos, length, src_pos, src, r0, rscratch1);
2452
2453 // Restore previously spilled arguments
2454 __ ldp(dst, dst_pos, Address(sp, 0*BytesPerWord));
2455 __ ldp(length, src_pos, Address(sp, 2*BytesPerWord));
2456 __ ldr(src, Address(sp, 4*BytesPerWord));
2457
2458 // return value is -1^K where K is partial copied count
2459 __ eonw(rscratch1, r0, zr);
2460 // adjust length down and src/end pos up by partial copied count
2461 __ subw(length, length, rscratch1);
2462 __ addw(src_pos, src_pos, rscratch1);
2463 __ addw(dst_pos, dst_pos, rscratch1);
2464 }
2465
2466 __ b(*stub->entry());
2467
2468 __ bind(cont);
2469 __ POP(src, dst);
2470 }
2471 }
2472
2473 #ifdef ASSERT
2474 if (basic_type != T_OBJECT || !(flags & LIR_OpArrayCopy::type_check)) {
2475 // Sanity check the known type with the incoming class. For the
2476 // primitive case the types must match exactly with src.klass and
2477 // dst.klass each exactly matching the default type. For the
2478 // object array case, if no type check is needed then either the
2479 // dst type is exactly the expected type and the src type is a
2480 // subtype which we can't check or src is the same array as dst
2481 // but not necessarily exactly of type default_type.
2482 Label known_ok, halt;
2483 __ mov_metadata(tmp, default_type->constant_encoding());
2484
2485 if (basic_type != T_OBJECT) {
2486 __ cmp_klass(dst, tmp, rscratch1);
2487 __ br(Assembler::NE, halt);
2488 __ cmp_klass(src, tmp, rscratch1);
2489 __ br(Assembler::EQ, known_ok);
2490 } else {
2491 __ cmp_klass(dst, tmp, rscratch1);
2492 __ br(Assembler::EQ, known_ok);
2493 __ cmp(src, dst);
2494 __ br(Assembler::EQ, known_ok);
2495 }
2496 __ bind(halt);
2497 __ stop("incorrect type information in arraycopy");
2498 __ bind(known_ok);
2499 }
2500 #endif
2501
2502 #ifndef PRODUCT
2503 if (PrintC1Statistics) {
2504 __ incrementw(ExternalAddress(Runtime1::arraycopy_count_address(basic_type)));
2505 }
2506 #endif
2507
2508 __ lea(c_rarg0, Address(src, src_pos, Address::uxtw(scale)));
2509 __ add(c_rarg0, c_rarg0, arrayOopDesc::base_offset_in_bytes(basic_type));
2510 assert_different_registers(c_rarg0, dst, dst_pos, length);
2511 __ lea(c_rarg1, Address(dst, dst_pos, Address::uxtw(scale)));
2512 __ add(c_rarg1, c_rarg1, arrayOopDesc::base_offset_in_bytes(basic_type));
2513 assert_different_registers(c_rarg1, dst, length);
2514 __ uxtw(c_rarg2, length);
2515 assert_different_registers(c_rarg2, dst);
2516
2517 bool disjoint = (flags & LIR_OpArrayCopy::overlapping) == 0;
2518 bool aligned = (flags & LIR_OpArrayCopy::unaligned) == 0;
2519 const char *name;
2520 address entry = StubRoutines::select_arraycopy_function(basic_type, aligned, disjoint, name, false);
2521
2522 CodeBlob *cb = CodeCache::find_blob(entry);
2523 if (cb) {
2524 __ far_call(RuntimeAddress(entry));
2525 } else {
2526 __ call_VM_leaf(entry, 3);
2527 }
2528
2529 __ bind(*stub->continuation());
2530 }
2531
2532
2533
2534
2535 void LIR_Assembler::emit_lock(LIR_OpLock* op) {
2536 Register obj = op->obj_opr()->as_register(); // may not be an oop
2537 Register hdr = op->hdr_opr()->as_register();
2538 Register lock = op->lock_opr()->as_register();
2539 if (LockingMode == LM_MONITOR) {
2540 if (op->info() != nullptr) {
2541 add_debug_info_for_null_check_here(op->info());
2542 __ null_check(obj, -1);
2543 }
2544 __ b(*op->stub()->entry());
2545 } else if (op->code() == lir_lock) {
2546 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
2547 // add debug info for NullPointerException only if one is possible
2548 int null_check_offset = __ lock_object(hdr, obj, lock, *op->stub()->entry());
2549 if (op->info() != nullptr) {
2550 add_debug_info_for_null_check(null_check_offset, op->info());
2551 }
2552 // done
2553 } else if (op->code() == lir_unlock) {
2554 assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
2555 __ unlock_object(hdr, obj, lock, *op->stub()->entry());
2556 } else {
2557 Unimplemented();
2558 }
2559 __ bind(*op->stub()->continuation());
2560 }
2561
2562 void LIR_Assembler::emit_load_klass(LIR_OpLoadKlass* op) {
2563 Register obj = op->obj()->as_pointer_register();
2564 Register result = op->result_opr()->as_pointer_register();
2565
2566 CodeEmitInfo* info = op->info();
2567 if (info != nullptr) {
2568 add_debug_info_for_null_check_here(info);
2569 }
2570
2571 if (UseCompressedClassPointers) {
2572 if (UseCompactObjectHeaders) {
2573 // Check if we can take the (common) fast path, if obj is unlocked.
2574 __ ldr(result, Address(obj, oopDesc::mark_offset_in_bytes()));
2575 __ tst(result, markWord::monitor_value);
2576 __ br(Assembler::NE, *op->stub()->entry());
2577 __ bind(*op->stub()->continuation());
2578
2579 // Shift to get proper narrow Klass*.
2580 __ lsr(result, result, markWord::klass_shift);
2581 } else {
2582 __ ldrw(result, Address (obj, oopDesc::klass_offset_in_bytes()));
2583 }
2584 __ decode_klass_not_null(result);
2585 } else {
2586 __ ldr(result, Address (obj, oopDesc::klass_offset_in_bytes()));
2587 }
2588 }
2589
2590 void LIR_Assembler::emit_profile_call(LIR_OpProfileCall* op) {
2591 ciMethod* method = op->profiled_method();
2592 int bci = op->profiled_bci();
2593 ciMethod* callee = op->profiled_callee();
2594
2595 // Update counter for all call types
2596 ciMethodData* md = method->method_data_or_null();
2597 assert(md != nullptr, "Sanity");
2598 ciProfileData* data = md->bci_to_data(bci);
2599 assert(data != nullptr && data->is_CounterData(), "need CounterData for calls");
2600 assert(op->mdo()->is_single_cpu(), "mdo must be allocated");
2601 Register mdo = op->mdo()->as_register();
2602 __ mov_metadata(mdo, md->constant_encoding());
2603 Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
2604 // Perform additional virtual call profiling for invokevirtual and
2605 // invokeinterface bytecodes
2606 if (op->should_profile_receiver_type()) {
2607 assert(op->recv()->is_single_cpu(), "recv must be allocated");
2608 Register recv = op->recv()->as_register();
2609 assert_different_registers(mdo, recv);
2610 assert(data->is_VirtualCallData(), "need VirtualCallData for virtual calls");
2611 ciKlass* known_klass = op->known_holder();
2612 if (C1OptimizeVirtualCallProfiling && known_klass != nullptr) {
2613 // We know the type that will be seen at this call site; we can
2614 // statically update the MethodData* rather than needing to do
2615 // dynamic tests on the receiver type
2616
2617 // NOTE: we should probably put a lock around this search to
2618 // avoid collisions by concurrent compilations
2619 ciVirtualCallData* vc_data = (ciVirtualCallData*) data;
2620 uint i;
2621 for (i = 0; i < VirtualCallData::row_limit(); i++) {
2622 ciKlass* receiver = vc_data->receiver(i);
2623 if (known_klass->equals(receiver)) {
2624 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
2625 __ addptr(data_addr, DataLayout::counter_increment);
2626 return;
2627 }
2628 }
2629
2630 // Receiver type not found in profile data; select an empty slot
2631
2632 // Note that this is less efficient than it should be because it
2633 // always does a write to the receiver part of the
2634 // VirtualCallData rather than just the first time
2635 for (i = 0; i < VirtualCallData::row_limit(); i++) {
2636 ciKlass* receiver = vc_data->receiver(i);
2637 if (receiver == nullptr) {
2638 Address recv_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_offset(i)));
2639 __ mov_metadata(rscratch1, known_klass->constant_encoding());
2640 __ lea(rscratch2, recv_addr);
2641 __ str(rscratch1, Address(rscratch2));
2642 Address data_addr(mdo, md->byte_offset_of_slot(data, VirtualCallData::receiver_count_offset(i)));
2643 __ addptr(data_addr, DataLayout::counter_increment);
2644 return;
2645 }
2646 }
2647 } else {
2648 __ load_klass(recv, recv);
2649 Label update_done;
2650 type_profile_helper(mdo, md, data, recv, &update_done);
2651 // Receiver did not match any saved receiver and there is no empty row for it.
2652 // Increment total counter to indicate polymorphic case.
2653 __ addptr(counter_addr, DataLayout::counter_increment);
2654
2655 __ bind(update_done);
2656 }
2657 } else {
2658 // Static call
2659 __ addptr(counter_addr, DataLayout::counter_increment);
2660 }
2661 }
2662
2663
2664 void LIR_Assembler::emit_delay(LIR_OpDelay*) {
2665 Unimplemented();
2666 }
2667
2668
2669 void LIR_Assembler::monitor_address(int monitor_no, LIR_Opr dst) {
2670 __ lea(dst->as_register(), frame_map()->address_for_monitor_lock(monitor_no));
2671 }
2672
2673 void LIR_Assembler::emit_updatecrc32(LIR_OpUpdateCRC32* op) {
2674 assert(op->crc()->is_single_cpu(), "crc must be register");
2675 assert(op->val()->is_single_cpu(), "byte value must be register");
2676 assert(op->result_opr()->is_single_cpu(), "result must be register");
2677 Register crc = op->crc()->as_register();
2678 Register val = op->val()->as_register();
2679 Register res = op->result_opr()->as_register();
2680
2681 assert_different_registers(val, crc, res);
2682 uint64_t offset;
2683 __ adrp(res, ExternalAddress(StubRoutines::crc_table_addr()), offset);
2684 __ add(res, res, offset);
2685
2686 __ mvnw(crc, crc); // ~crc
2687 __ update_byte_crc32(crc, val, res);
2688 __ mvnw(res, crc); // ~crc
2689 }
2690
2691 void LIR_Assembler::emit_profile_type(LIR_OpProfileType* op) {
2692 COMMENT("emit_profile_type {");
2693 Register obj = op->obj()->as_register();
2694 Register tmp = op->tmp()->as_pointer_register();
2695 Address mdo_addr = as_Address(op->mdp()->as_address_ptr());
2696 ciKlass* exact_klass = op->exact_klass();
2697 intptr_t current_klass = op->current_klass();
2698 bool not_null = op->not_null();
2699 bool no_conflict = op->no_conflict();
2700
2701 Label update, next, none;
2702
2703 bool do_null = !not_null;
2704 bool exact_klass_set = exact_klass != nullptr && ciTypeEntries::valid_ciklass(current_klass) == exact_klass;
2705 bool do_update = !TypeEntries::is_type_unknown(current_klass) && !exact_klass_set;
2706
2707 assert(do_null || do_update, "why are we here?");
2708 assert(!TypeEntries::was_null_seen(current_klass) || do_update, "why are we here?");
2709 assert(mdo_addr.base() != rscratch1, "wrong register");
2710
2711 __ verify_oop(obj);
2712
2713 if (tmp != obj) {
2714 __ mov(tmp, obj);
2715 }
2716 if (do_null) {
2717 __ cbnz(tmp, update);
2718 if (!TypeEntries::was_null_seen(current_klass)) {
2719 __ ldr(rscratch2, mdo_addr);
2720 __ orr(rscratch2, rscratch2, TypeEntries::null_seen);
2721 __ str(rscratch2, mdo_addr);
2722 }
2723 if (do_update) {
2724 #ifndef ASSERT
2725 __ b(next);
2726 }
2727 #else
2728 __ b(next);
2729 }
2730 } else {
2731 __ cbnz(tmp, update);
2732 __ stop("unexpected null obj");
2733 #endif
2734 }
2735
2736 __ bind(update);
2737
2738 if (do_update) {
2739 #ifdef ASSERT
2740 if (exact_klass != nullptr) {
2741 Label ok;
2742 __ load_klass(tmp, tmp);
2743 __ mov_metadata(rscratch1, exact_klass->constant_encoding());
2744 __ eor(rscratch1, tmp, rscratch1);
2745 __ cbz(rscratch1, ok);
2746 __ stop("exact klass and actual klass differ");
2747 __ bind(ok);
2748 }
2749 #endif
2750 if (!no_conflict) {
2751 if (exact_klass == nullptr || TypeEntries::is_type_none(current_klass)) {
2752 if (exact_klass != nullptr) {
2753 __ mov_metadata(tmp, exact_klass->constant_encoding());
2754 } else {
2755 __ load_klass(tmp, tmp);
2756 }
2757
2758 __ ldr(rscratch2, mdo_addr);
2759 __ eor(tmp, tmp, rscratch2);
2760 __ andr(rscratch1, tmp, TypeEntries::type_klass_mask);
2761 // klass seen before, nothing to do. The unknown bit may have been
2762 // set already but no need to check.
2763 __ cbz(rscratch1, next);
2764
2765 __ tbnz(tmp, exact_log2(TypeEntries::type_unknown), next); // already unknown. Nothing to do anymore.
2766
2767 if (TypeEntries::is_type_none(current_klass)) {
2768 __ cbz(rscratch2, none);
2769 __ cmp(rscratch2, (u1)TypeEntries::null_seen);
2770 __ br(Assembler::EQ, none);
2771 // There is a chance that the checks above (re-reading profiling
2772 // data from memory) fail if another thread has just set the
2773 // profiling to this obj's klass
2774 __ dmb(Assembler::ISHLD);
2775 __ ldr(rscratch2, mdo_addr);
2776 __ eor(tmp, tmp, rscratch2);
2777 __ andr(rscratch1, tmp, TypeEntries::type_klass_mask);
2778 __ cbz(rscratch1, next);
2779 }
2780 } else {
2781 assert(ciTypeEntries::valid_ciklass(current_klass) != nullptr &&
2782 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "conflict only");
2783
2784 __ ldr(tmp, mdo_addr);
2785 __ tbnz(tmp, exact_log2(TypeEntries::type_unknown), next); // already unknown. Nothing to do anymore.
2786 }
2787
2788 // different than before. Cannot keep accurate profile.
2789 __ ldr(rscratch2, mdo_addr);
2790 __ orr(rscratch2, rscratch2, TypeEntries::type_unknown);
2791 __ str(rscratch2, mdo_addr);
2792
2793 if (TypeEntries::is_type_none(current_klass)) {
2794 __ b(next);
2795
2796 __ bind(none);
2797 // first time here. Set profile type.
2798 __ str(tmp, mdo_addr);
2799 }
2800 } else {
2801 // There's a single possible klass at this profile point
2802 assert(exact_klass != nullptr, "should be");
2803 if (TypeEntries::is_type_none(current_klass)) {
2804 __ mov_metadata(tmp, exact_klass->constant_encoding());
2805 __ ldr(rscratch2, mdo_addr);
2806 __ eor(tmp, tmp, rscratch2);
2807 __ andr(rscratch1, tmp, TypeEntries::type_klass_mask);
2808 __ cbz(rscratch1, next);
2809 #ifdef ASSERT
2810 {
2811 Label ok;
2812 __ ldr(rscratch1, mdo_addr);
2813 __ cbz(rscratch1, ok);
2814 __ cmp(rscratch1, (u1)TypeEntries::null_seen);
2815 __ br(Assembler::EQ, ok);
2816 // may have been set by another thread
2817 __ dmb(Assembler::ISHLD);
2818 __ mov_metadata(rscratch1, exact_klass->constant_encoding());
2819 __ ldr(rscratch2, mdo_addr);
2820 __ eor(rscratch2, rscratch1, rscratch2);
2821 __ andr(rscratch2, rscratch2, TypeEntries::type_mask);
2822 __ cbz(rscratch2, ok);
2823
2824 __ stop("unexpected profiling mismatch");
2825 __ bind(ok);
2826 }
2827 #endif
2828 // first time here. Set profile type.
2829 __ str(tmp, mdo_addr);
2830 } else {
2831 assert(ciTypeEntries::valid_ciklass(current_klass) != nullptr &&
2832 ciTypeEntries::valid_ciklass(current_klass) != exact_klass, "inconsistent");
2833
2834 __ ldr(tmp, mdo_addr);
2835 __ tbnz(tmp, exact_log2(TypeEntries::type_unknown), next); // already unknown. Nothing to do anymore.
2836
2837 __ orr(tmp, tmp, TypeEntries::type_unknown);
2838 __ str(tmp, mdo_addr);
2839 // FIXME: Write barrier needed here?
2840 }
2841 }
2842
2843 __ bind(next);
2844 }
2845 COMMENT("} emit_profile_type");
2846 }
2847
2848
2849 void LIR_Assembler::align_backward_branch_target() {
2850 }
2851
2852
2853 void LIR_Assembler::negate(LIR_Opr left, LIR_Opr dest, LIR_Opr tmp) {
2854 // tmp must be unused
2855 assert(tmp->is_illegal(), "wasting a register if tmp is allocated");
2856
2857 if (left->is_single_cpu()) {
2858 assert(dest->is_single_cpu(), "expect single result reg");
2859 __ negw(dest->as_register(), left->as_register());
2860 } else if (left->is_double_cpu()) {
2861 assert(dest->is_double_cpu(), "expect double result reg");
2862 __ neg(dest->as_register_lo(), left->as_register_lo());
2863 } else if (left->is_single_fpu()) {
2864 assert(dest->is_single_fpu(), "expect single float result reg");
2865 __ fnegs(dest->as_float_reg(), left->as_float_reg());
2866 } else {
2867 assert(left->is_double_fpu(), "expect double float operand reg");
2868 assert(dest->is_double_fpu(), "expect double float result reg");
2869 __ fnegd(dest->as_double_reg(), left->as_double_reg());
2870 }
2871 }
2872
2873
2874 void LIR_Assembler::leal(LIR_Opr addr, LIR_Opr dest, LIR_PatchCode patch_code, CodeEmitInfo* info) {
2875 if (patch_code != lir_patch_none) {
2876 deoptimize_trap(info);
2877 return;
2878 }
2879
2880 __ lea(dest->as_register_lo(), as_Address(addr->as_address_ptr()));
2881 }
2882
2883
2884 void LIR_Assembler::rt_call(LIR_Opr result, address dest, const LIR_OprList* args, LIR_Opr tmp, CodeEmitInfo* info) {
2885 assert(!tmp->is_valid(), "don't need temporary");
2886
2887 CodeBlob *cb = CodeCache::find_blob(dest);
2888 if (cb) {
2889 __ far_call(RuntimeAddress(dest));
2890 } else {
2891 __ mov(rscratch1, RuntimeAddress(dest));
2892 __ blr(rscratch1);
2893 }
2894
2895 if (info != nullptr) {
2896 add_call_info_here(info);
2897 }
2898 __ post_call_nop();
2899 }
2900
2901 void LIR_Assembler::volatile_move_op(LIR_Opr src, LIR_Opr dest, BasicType type, CodeEmitInfo* info) {
2902 if (dest->is_address() || src->is_address()) {
2903 move_op(src, dest, type, lir_patch_none, info,
2904 /*pop_fpu_stack*/false, /*wide*/false);
2905 } else {
2906 ShouldNotReachHere();
2907 }
2908 }
2909
2910 #ifdef ASSERT
2911 // emit run-time assertion
2912 void LIR_Assembler::emit_assert(LIR_OpAssert* op) {
2913 assert(op->code() == lir_assert, "must be");
2914
2915 if (op->in_opr1()->is_valid()) {
2916 assert(op->in_opr2()->is_valid(), "both operands must be valid");
2917 comp_op(op->condition(), op->in_opr1(), op->in_opr2(), op);
2918 } else {
2919 assert(op->in_opr2()->is_illegal(), "both operands must be illegal");
2920 assert(op->condition() == lir_cond_always, "no other conditions allowed");
2921 }
2922
2923 Label ok;
2924 if (op->condition() != lir_cond_always) {
2925 Assembler::Condition acond = Assembler::AL;
2926 switch (op->condition()) {
2927 case lir_cond_equal: acond = Assembler::EQ; break;
2928 case lir_cond_notEqual: acond = Assembler::NE; break;
2929 case lir_cond_less: acond = Assembler::LT; break;
2930 case lir_cond_lessEqual: acond = Assembler::LE; break;
2931 case lir_cond_greaterEqual: acond = Assembler::GE; break;
2932 case lir_cond_greater: acond = Assembler::GT; break;
2933 case lir_cond_belowEqual: acond = Assembler::LS; break;
2934 case lir_cond_aboveEqual: acond = Assembler::HS; break;
2935 default: ShouldNotReachHere();
2936 }
2937 __ br(acond, ok);
2938 }
2939 if (op->halt()) {
2940 const char* str = __ code_string(op->msg());
2941 __ stop(str);
2942 } else {
2943 breakpoint();
2944 }
2945 __ bind(ok);
2946 }
2947 #endif
2948
2949 #ifndef PRODUCT
2950 #define COMMENT(x) do { __ block_comment(x); } while (0)
2951 #else
2952 #define COMMENT(x)
2953 #endif
2954
2955 void LIR_Assembler::membar() {
2956 COMMENT("membar");
2957 __ membar(MacroAssembler::AnyAny);
2958 }
2959
2960 void LIR_Assembler::membar_acquire() {
2961 __ membar(Assembler::LoadLoad|Assembler::LoadStore);
2962 }
2963
2964 void LIR_Assembler::membar_release() {
2965 __ membar(Assembler::LoadStore|Assembler::StoreStore);
2966 }
2967
2968 void LIR_Assembler::membar_loadload() {
2969 __ membar(Assembler::LoadLoad);
2970 }
2971
2972 void LIR_Assembler::membar_storestore() {
2973 __ membar(MacroAssembler::StoreStore);
2974 }
2975
2976 void LIR_Assembler::membar_loadstore() { __ membar(MacroAssembler::LoadStore); }
2977
2978 void LIR_Assembler::membar_storeload() { __ membar(MacroAssembler::StoreLoad); }
2979
2980 void LIR_Assembler::on_spin_wait() {
2981 __ spin_wait();
2982 }
2983
2984 void LIR_Assembler::get_thread(LIR_Opr result_reg) {
2985 __ mov(result_reg->as_register(), rthread);
2986 }
2987
2988
2989 void LIR_Assembler::peephole(LIR_List *lir) {
2990 #if 0
2991 if (tableswitch_count >= max_tableswitches)
2992 return;
2993
2994 /*
2995 This finite-state automaton recognizes sequences of compare-and-
2996 branch instructions. We will turn them into a tableswitch. You
2997 could argue that C1 really shouldn't be doing this sort of
2998 optimization, but without it the code is really horrible.
2999 */
3000
3001 enum { start_s, cmp1_s, beq_s, cmp_s } state;
3002 int first_key, last_key = -2147483648;
3003 int next_key = 0;
3004 int start_insn = -1;
3005 int last_insn = -1;
3006 Register reg = noreg;
3007 LIR_Opr reg_opr;
3008 state = start_s;
3009
3010 LIR_OpList* inst = lir->instructions_list();
3011 for (int i = 0; i < inst->length(); i++) {
3012 LIR_Op* op = inst->at(i);
3013 switch (state) {
3014 case start_s:
3015 first_key = -1;
3016 start_insn = i;
3017 switch (op->code()) {
3018 case lir_cmp:
3019 LIR_Opr opr1 = op->as_Op2()->in_opr1();
3020 LIR_Opr opr2 = op->as_Op2()->in_opr2();
3021 if (opr1->is_cpu_register() && opr1->is_single_cpu()
3022 && opr2->is_constant()
3023 && opr2->type() == T_INT) {
3024 reg_opr = opr1;
3025 reg = opr1->as_register();
3026 first_key = opr2->as_constant_ptr()->as_jint();
3027 next_key = first_key + 1;
3028 state = cmp_s;
3029 goto next_state;
3030 }
3031 break;
3032 }
3033 break;
3034 case cmp_s:
3035 switch (op->code()) {
3036 case lir_branch:
3037 if (op->as_OpBranch()->cond() == lir_cond_equal) {
3038 state = beq_s;
3039 last_insn = i;
3040 goto next_state;
3041 }
3042 }
3043 state = start_s;
3044 break;
3045 case beq_s:
3046 switch (op->code()) {
3047 case lir_cmp: {
3048 LIR_Opr opr1 = op->as_Op2()->in_opr1();
3049 LIR_Opr opr2 = op->as_Op2()->in_opr2();
3050 if (opr1->is_cpu_register() && opr1->is_single_cpu()
3051 && opr1->as_register() == reg
3052 && opr2->is_constant()
3053 && opr2->type() == T_INT
3054 && opr2->as_constant_ptr()->as_jint() == next_key) {
3055 last_key = next_key;
3056 next_key++;
3057 state = cmp_s;
3058 goto next_state;
3059 }
3060 }
3061 }
3062 last_key = next_key;
3063 state = start_s;
3064 break;
3065 default:
3066 assert(false, "impossible state");
3067 }
3068 if (state == start_s) {
3069 if (first_key < last_key - 5L && reg != noreg) {
3070 {
3071 // printf("found run register %d starting at insn %d low value %d high value %d\n",
3072 // reg->encoding(),
3073 // start_insn, first_key, last_key);
3074 // for (int i = 0; i < inst->length(); i++) {
3075 // inst->at(i)->print();
3076 // tty->print("\n");
3077 // }
3078 // tty->print("\n");
3079 }
3080
3081 struct tableswitch *sw = &switches[tableswitch_count];
3082 sw->_insn_index = start_insn, sw->_first_key = first_key,
3083 sw->_last_key = last_key, sw->_reg = reg;
3084 inst->insert_before(last_insn + 1, new LIR_OpLabel(&sw->_after));
3085 {
3086 // Insert the new table of branches
3087 int offset = last_insn;
3088 for (int n = first_key; n < last_key; n++) {
3089 inst->insert_before
3090 (last_insn + 1,
3091 new LIR_OpBranch(lir_cond_always, T_ILLEGAL,
3092 inst->at(offset)->as_OpBranch()->label()));
3093 offset -= 2, i++;
3094 }
3095 }
3096 // Delete all the old compare-and-branch instructions
3097 for (int n = first_key; n < last_key; n++) {
3098 inst->remove_at(start_insn);
3099 inst->remove_at(start_insn);
3100 }
3101 // Insert the tableswitch instruction
3102 inst->insert_before(start_insn,
3103 new LIR_Op2(lir_cmp, lir_cond_always,
3104 LIR_OprFact::intConst(tableswitch_count),
3105 reg_opr));
3106 inst->insert_before(start_insn + 1, new LIR_OpLabel(&sw->_branches));
3107 tableswitch_count++;
3108 }
3109 reg = noreg;
3110 last_key = -2147483648;
3111 }
3112 next_state:
3113 ;
3114 }
3115 #endif
3116 }
3117
3118 void LIR_Assembler::atomic_op(LIR_Code code, LIR_Opr src, LIR_Opr data, LIR_Opr dest, LIR_Opr tmp_op) {
3119 Address addr = as_Address(src->as_address_ptr());
3120 BasicType type = src->type();
3121 bool is_oop = is_reference_type(type);
3122
3123 void (MacroAssembler::* add)(Register prev, RegisterOrConstant incr, Register addr);
3124 void (MacroAssembler::* xchg)(Register prev, Register newv, Register addr);
3125
3126 switch(type) {
3127 case T_INT:
3128 xchg = &MacroAssembler::atomic_xchgalw;
3129 add = &MacroAssembler::atomic_addalw;
3130 break;
3131 case T_LONG:
3132 xchg = &MacroAssembler::atomic_xchgal;
3133 add = &MacroAssembler::atomic_addal;
3134 break;
3135 case T_OBJECT:
3136 case T_ARRAY:
3137 if (UseCompressedOops) {
3138 xchg = &MacroAssembler::atomic_xchgalw;
3139 add = &MacroAssembler::atomic_addalw;
3140 } else {
3141 xchg = &MacroAssembler::atomic_xchgal;
3142 add = &MacroAssembler::atomic_addal;
3143 }
3144 break;
3145 default:
3146 ShouldNotReachHere();
3147 xchg = &MacroAssembler::atomic_xchgal;
3148 add = &MacroAssembler::atomic_addal; // unreachable
3149 }
3150
3151 switch (code) {
3152 case lir_xadd:
3153 {
3154 RegisterOrConstant inc;
3155 Register tmp = as_reg(tmp_op);
3156 Register dst = as_reg(dest);
3157 if (data->is_constant()) {
3158 inc = RegisterOrConstant(as_long(data));
3159 assert_different_registers(dst, addr.base(), tmp,
3160 rscratch1, rscratch2);
3161 } else {
3162 inc = RegisterOrConstant(as_reg(data));
3163 assert_different_registers(inc.as_register(), dst, addr.base(), tmp,
3164 rscratch1, rscratch2);
3165 }
3166 __ lea(tmp, addr);
3167 (_masm->*add)(dst, inc, tmp);
3168 break;
3169 }
3170 case lir_xchg:
3171 {
3172 Register tmp = tmp_op->as_register();
3173 Register obj = as_reg(data);
3174 Register dst = as_reg(dest);
3175 if (is_oop && UseCompressedOops) {
3176 __ encode_heap_oop(rscratch2, obj);
3177 obj = rscratch2;
3178 }
3179 assert_different_registers(obj, addr.base(), tmp, rscratch1);
3180 assert_different_registers(dst, addr.base(), tmp, rscratch1);
3181 __ lea(tmp, addr);
3182 (_masm->*xchg)(dst, obj, tmp);
3183 if (is_oop && UseCompressedOops) {
3184 __ decode_heap_oop(dst);
3185 }
3186 }
3187 break;
3188 default:
3189 ShouldNotReachHere();
3190 }
3191 __ membar(__ AnyAny);
3192 }
3193
3194 #undef __