1 /*
2 * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "asm/assembler.hpp"
26 #include "asm/macroAssembler.hpp"
27 #include "classfile/javaClasses.hpp"
28 #include "classfile/vmIntrinsics.hpp"
29 #include "compiler/oopMap.hpp"
30 #include "gc/shared/barrierSet.hpp"
31 #include "gc/shared/barrierSetAssembler.hpp"
32 #include "gc/shared/barrierSetNMethod.hpp"
33 #include "gc/shared/gc_globals.hpp"
34 #include "memory/universe.hpp"
35 #include "oops/inlineKlass.hpp"
36 #include "prims/jvmtiExport.hpp"
37 #include "prims/upcallLinker.hpp"
38 #include "runtime/arguments.hpp"
39 #include "runtime/continuationEntry.hpp"
40 #include "runtime/javaThread.hpp"
41 #include "runtime/sharedRuntime.hpp"
42 #include "runtime/stubRoutines.hpp"
43 #include "utilities/macros.hpp"
44 #include "vmreg_x86.inline.hpp"
45 #include "stubGenerator_x86_64.hpp"
46 #ifdef COMPILER2
47 #include "opto/runtime.hpp"
48 #include "opto/c2_globals.hpp"
49 #endif
50 #if INCLUDE_JVMCI
51 #include "jvmci/jvmci_globals.hpp"
52 #endif
53
54 // For a more detailed description of the stub routine structure
55 // see the comment in stubRoutines.hpp
56
57 #define __ _masm->
58 #define TIMES_OOP (UseCompressedOops ? Address::times_4 : Address::times_8)
59
60 #ifdef PRODUCT
61 #define BLOCK_COMMENT(str) /* nothing */
62 #else
63 #define BLOCK_COMMENT(str) __ block_comment(str)
64 #endif // PRODUCT
65
66 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
67
68 //
69 // Linux Arguments:
70 // c_rarg0: call wrapper address address
71 // c_rarg1: result address
72 // c_rarg2: result type BasicType
73 // c_rarg3: method Method*
74 // c_rarg4: (interpreter) entry point address
75 // c_rarg5: parameters intptr_t*
76 // 16(rbp): parameter size (in words) int
77 // 24(rbp): thread Thread*
78 //
79 // [ return_from_Java ] <--- rsp
80 // [ argument word n ]
81 // ...
82 // -12 [ argument word 1 ]
83 // -11 [ saved r15 ] <--- rsp_after_call
84 // -10 [ saved r14 ]
85 // -9 [ saved r13 ]
86 // -8 [ saved r12 ]
87 // -7 [ saved rbx ]
88 // -6 [ call wrapper ]
89 // -5 [ result ]
90 // -4 [ result type ]
91 // -3 [ method ]
92 // -2 [ entry point ]
93 // -1 [ parameters ]
94 // 0 [ saved rbp ] <--- rbp
95 // 1 [ return address ]
96 // 2 [ parameter size ]
97 // 3 [ thread ]
98 //
99 // Windows Arguments:
100 // c_rarg0: call wrapper address address
101 // c_rarg1: result address
102 // c_rarg2: result type BasicType
103 // c_rarg3: method Method*
104 // 48(rbp): (interpreter) entry point address
105 // 56(rbp): parameters intptr_t*
106 // 64(rbp): parameter size (in words) int
107 // 72(rbp): thread Thread*
108 //
109 // [ return_from_Java ] <--- rsp
110 // [ argument word n ]
111 // ...
112 // -28 [ argument word 1 ]
113 // -27 [ saved xmm15 ] <--- rsp after_call
114 // [ saved xmm7-xmm14 ]
115 // -9 [ saved xmm6 ] (each xmm register takes 2 slots)
116 // -7 [ saved r15 ]
117 // -6 [ saved r14 ]
118 // -5 [ saved r13 ]
119 // -4 [ saved r12 ]
120 // -3 [ saved rdi ]
121 // -2 [ saved rsi ]
122 // -1 [ saved rbx ]
123 // 0 [ saved rbp ] <--- rbp
124 // 1 [ return address ]
125 // 2 [ call wrapper ]
126 // 3 [ result ]
127 // 4 [ result type ]
128 // 5 [ method ]
129 // 6 [ entry point ]
130 // 7 [ parameters ]
131 // 8 [ parameter size ]
132 // 9 [ thread ]
133 //
134 // Windows reserves the callers stack space for arguments 1-4.
135 // We spill c_rarg0-c_rarg3 to this space.
136
137 // Call stub stack layout word offsets from rbp
138 #ifdef _WIN64
139 enum call_stub_layout {
140 xmm_save_first = 6, // save from xmm6
141 xmm_save_last = 15, // to xmm15
142 xmm_save_base = -9,
143 rsp_after_call_off = xmm_save_base - 2 * (xmm_save_last - xmm_save_first), // -27
144 r15_off = -7,
145 r14_off = -6,
146 r13_off = -5,
147 r12_off = -4,
148 rdi_off = -3,
149 rsi_off = -2,
150 rbx_off = -1,
151 rbp_off = 0,
152 retaddr_off = 1,
153 call_wrapper_off = 2,
154 result_off = 3,
155 result_type_off = 4,
156 method_off = 5,
157 entry_point_off = 6,
158 parameters_off = 7,
159 parameter_size_off = 8,
160 thread_off = 9
161 };
162
163 static Address xmm_save(int reg) {
164 assert(reg >= xmm_save_first && reg <= xmm_save_last, "XMM register number out of range");
165 return Address(rbp, (xmm_save_base - (reg - xmm_save_first) * 2) * wordSize);
166 }
167 #else // !_WIN64
168 enum call_stub_layout {
169 rsp_after_call_off = -12,
170 mxcsr_off = rsp_after_call_off,
171 r15_off = -11,
172 r14_off = -10,
173 r13_off = -9,
174 r12_off = -8,
175 rbx_off = -7,
176 call_wrapper_off = -6,
177 result_off = -5,
178 result_type_off = -4,
179 method_off = -3,
180 entry_point_off = -2,
181 parameters_off = -1,
182 rbp_off = 0,
183 retaddr_off = 1,
184 parameter_size_off = 2,
185 thread_off = 3
186 };
187 #endif // _WIN64
188
189 address StubGenerator::generate_call_stub(address& return_address) {
190
191 assert((int)frame::entry_frame_after_call_words == -(int)rsp_after_call_off + 1 &&
192 (int)frame::entry_frame_call_wrapper_offset == (int)call_wrapper_off,
193 "adjust this code");
194 StubId stub_id = StubId::stubgen_call_stub_id;
195 GrowableArray<address> entries;
196 int entry_count = StubInfo::entry_count(stub_id);
197 assert(entry_count == 2, "sanity check");
198 address start = load_archive_data(stub_id, &entries);
199 if (start != nullptr) {
200 assert(entries.length() == 1, "expected 1 extra entry");
201 return_address = entries.at(0);
202 return start;
203 }
204
205 StubCodeMark mark(this, stub_id);
206 start = __ pc();
207
208 // same as in generate_catch_exception()!
209 const Address rsp_after_call(rbp, rsp_after_call_off * wordSize);
210
211 const Address call_wrapper (rbp, call_wrapper_off * wordSize);
212 const Address result (rbp, result_off * wordSize);
213 const Address result_type (rbp, result_type_off * wordSize);
214 const Address method (rbp, method_off * wordSize);
215 const Address entry_point (rbp, entry_point_off * wordSize);
216 const Address parameters (rbp, parameters_off * wordSize);
217 const Address parameter_size(rbp, parameter_size_off * wordSize);
218
219 // same as in generate_catch_exception()!
220 const Address thread (rbp, thread_off * wordSize);
221
222 const Address r15_save(rbp, r15_off * wordSize);
223 const Address r14_save(rbp, r14_off * wordSize);
224 const Address r13_save(rbp, r13_off * wordSize);
225 const Address r12_save(rbp, r12_off * wordSize);
226 const Address rbx_save(rbp, rbx_off * wordSize);
227
228 // stub code
229 __ enter();
230 __ subptr(rsp, -rsp_after_call_off * wordSize);
231
232 // save register parameters
233 #ifndef _WIN64
234 __ movptr(parameters, c_rarg5); // parameters
235 __ movptr(entry_point, c_rarg4); // entry_point
236 #endif
237
238 __ movptr(method, c_rarg3); // method
239 __ movl(result_type, c_rarg2); // result type
240 __ movptr(result, c_rarg1); // result
241 __ movptr(call_wrapper, c_rarg0); // call wrapper
242
243 // save regs belonging to calling function
244 __ movptr(rbx_save, rbx);
245 __ movptr(r12_save, r12);
246 __ movptr(r13_save, r13);
247 __ movptr(r14_save, r14);
248 __ movptr(r15_save, r15);
249
250 #ifdef _WIN64
251 int last_reg = 15;
252 for (int i = xmm_save_first; i <= last_reg; i++) {
253 __ movdqu(xmm_save(i), as_XMMRegister(i));
254 }
255
256 const Address rdi_save(rbp, rdi_off * wordSize);
257 const Address rsi_save(rbp, rsi_off * wordSize);
258
259 __ movptr(rsi_save, rsi);
260 __ movptr(rdi_save, rdi);
261 #else
262 const Address mxcsr_save(rbp, mxcsr_off * wordSize);
263 {
264 Label skip_ldmx;
265 __ cmp32_mxcsr_std(mxcsr_save, rax, rscratch1);
266 __ jcc(Assembler::equal, skip_ldmx);
267 ExternalAddress mxcsr_std(StubRoutines::x86::addr_mxcsr_std());
268 __ ldmxcsr(mxcsr_std, rscratch1);
269 __ bind(skip_ldmx);
270 }
271 #endif
272
273 // Load up thread register
274 __ movptr(r15_thread, thread);
275 __ reinit_heapbase();
276
277 #ifdef ASSERT
278 // make sure we have no pending exceptions
279 {
280 Label L;
281 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
282 __ jcc(Assembler::equal, L);
283 __ stop("StubRoutines::call_stub: entered with pending exception");
284 __ bind(L);
285 }
286 #endif
287
288 // pass parameters if any
289 BLOCK_COMMENT("pass parameters if any");
290 Label parameters_done;
291 __ movl(c_rarg3, parameter_size);
292 __ testl(c_rarg3, c_rarg3);
293 __ jcc(Assembler::zero, parameters_done);
294
295 Label loop;
296 __ movptr(c_rarg2, parameters); // parameter pointer
297 __ movl(c_rarg1, c_rarg3); // parameter counter is in c_rarg1
298 __ BIND(loop);
299 __ movptr(rax, Address(c_rarg2, 0));// get parameter
300 __ addptr(c_rarg2, wordSize); // advance to next parameter
301 __ decrementl(c_rarg1); // decrement counter
302 __ push(rax); // pass parameter
303 __ jcc(Assembler::notZero, loop);
304
305 // call Java function
306 __ BIND(parameters_done);
307 __ movptr(rbx, method); // get Method*
308 __ movptr(c_rarg1, entry_point); // get entry_point
309 __ mov(r13, rsp); // set sender sp
310 BLOCK_COMMENT("call Java function");
311 __ call(c_rarg1);
312
313 BLOCK_COMMENT("call_stub_return_address:");
314 return_address = __ pc();
315 entries.append(return_address);
316
317 // store result depending on type (everything that is not
318 // T_OBJECT, T_LONG, T_FLOAT or T_DOUBLE is treated as T_INT)
319 __ movptr(r13, result);
320 Label is_long, is_float, is_double, check_prim, exit;
321 __ movl(rbx, result_type);
322 __ cmpl(rbx, T_OBJECT);
323 __ jcc(Assembler::equal, check_prim);
324 __ cmpl(rbx, T_LONG);
325 __ jcc(Assembler::equal, is_long);
326 __ cmpl(rbx, T_FLOAT);
327 __ jcc(Assembler::equal, is_float);
328 __ cmpl(rbx, T_DOUBLE);
329 __ jcc(Assembler::equal, is_double);
330 #ifdef ASSERT
331 // make sure the type is INT
332 {
333 Label L;
334 __ cmpl(rbx, T_INT);
335 __ jcc(Assembler::equal, L);
336 __ stop("StubRoutines::call_stub: unexpected result type");
337 __ bind(L);
338 }
339 #endif
340
341 // handle T_INT case
342 __ movl(Address(r13, 0), rax);
343
344 __ BIND(exit);
345
346 // pop parameters
347 __ lea(rsp, rsp_after_call);
348
349 #ifdef ASSERT
350 // verify that threads correspond
351 {
352 Label L1, L2, L3;
353 __ cmpptr(r15_thread, thread);
354 __ jcc(Assembler::equal, L1);
355 __ stop("StubRoutines::call_stub: r15_thread is corrupted");
356 __ bind(L1);
357 __ get_thread_slow(rbx);
358 __ cmpptr(r15_thread, thread);
359 __ jcc(Assembler::equal, L2);
360 __ stop("StubRoutines::call_stub: r15_thread is modified by call");
361 __ bind(L2);
362 __ cmpptr(r15_thread, rbx);
363 __ jcc(Assembler::equal, L3);
364 __ stop("StubRoutines::call_stub: threads must correspond");
365 __ bind(L3);
366 }
367 #endif
368
369 __ pop_cont_fastpath();
370
371 // restore regs belonging to calling function
372 #ifdef _WIN64
373 // emit the restores for xmm regs
374 for (int i = xmm_save_first; i <= last_reg; i++) {
375 __ movdqu(as_XMMRegister(i), xmm_save(i));
376 }
377 #endif
378 __ movptr(r15, r15_save);
379 __ movptr(r14, r14_save);
380 __ movptr(r13, r13_save);
381 __ movptr(r12, r12_save);
382 __ movptr(rbx, rbx_save);
383
384 #ifdef _WIN64
385 __ movptr(rdi, rdi_save);
386 __ movptr(rsi, rsi_save);
387 #else
388 __ ldmxcsr(mxcsr_save);
389 #endif
390
391 // restore rsp
392 __ addptr(rsp, -rsp_after_call_off * wordSize);
393
394 // return
395 __ vzeroupper();
396 __ pop(rbp);
397 __ ret(0);
398
399 // handle return types different from T_INT
400 __ BIND(check_prim);
401 if (InlineTypeReturnedAsFields) {
402 // Check for scalarized return value
403 __ testptr(rax, 1);
404 __ jcc(Assembler::zero, is_long);
405 // Load pack handler address
406 __ andptr(rax, -2);
407 __ movptr(rax, Address(rax, InlineKlass::adr_members_offset()));
408 __ movptr(rbx, Address(rax, InlineKlass::pack_handler_jobject_offset()));
409 // Call pack handler to initialize the buffer
410 __ call(rbx);
411 __ jmp(exit);
412 }
413 __ BIND(is_long);
414 __ movq(Address(r13, 0), rax);
415 __ jmp(exit);
416
417 __ BIND(is_float);
418 __ movflt(Address(r13, 0), xmm0);
419 __ jmp(exit);
420
421 __ BIND(is_double);
422 __ movdbl(Address(r13, 0), xmm0);
423 __ jmp(exit);
424
425 // record the stub entry and end plus the auxiliary entry
426 store_archive_data(stub_id, start, __ pc(), &entries);
427
428 return start;
429 }
430
431 // Return point for a Java call if there's an exception thrown in
432 // Java code. The exception is caught and transformed into a
433 // pending exception stored in JavaThread that can be tested from
434 // within the VM.
435 //
436 // Note: Usually the parameters are removed by the callee. In case
437 // of an exception crossing an activation frame boundary, that is
438 // not the case if the callee is compiled code => need to setup the
439 // rsp.
440 //
441 // rax: exception oop
442
443 address StubGenerator::generate_catch_exception() {
444 StubId stub_id = StubId::stubgen_catch_exception_id;
445 int entry_count = StubInfo::entry_count(stub_id);
446 assert(entry_count == 1, "sanity check");
447 address start = load_archive_data(stub_id);
448 if (start != nullptr) {
449 return start;
450 }
451
452 StubCodeMark mark(this, stub_id);
453 start = __ pc();
454
455 // same as in generate_call_stub():
456 const Address rsp_after_call(rbp, rsp_after_call_off * wordSize);
457 const Address thread (rbp, thread_off * wordSize);
458
459 #ifdef ASSERT
460 // verify that threads correspond
461 {
462 Label L1, L2, L3;
463 __ cmpptr(r15_thread, thread);
464 __ jcc(Assembler::equal, L1);
465 __ stop("StubRoutines::catch_exception: r15_thread is corrupted");
466 __ bind(L1);
467 __ get_thread_slow(rbx);
468 __ cmpptr(r15_thread, thread);
469 __ jcc(Assembler::equal, L2);
470 __ stop("StubRoutines::catch_exception: r15_thread is modified by call");
471 __ bind(L2);
472 __ cmpptr(r15_thread, rbx);
473 __ jcc(Assembler::equal, L3);
474 __ stop("StubRoutines::catch_exception: threads must correspond");
475 __ bind(L3);
476 }
477 #endif
478
479 // set pending exception
480 __ verify_oop(rax);
481
482 __ movptr(Address(r15_thread, Thread::pending_exception_offset()), rax);
483 // special case -- add file name string to AOT address table
484 address file = (address)AOTCodeCache::add_C_string(__FILE__);
485 __ lea(rscratch1, ExternalAddress(file));
486 __ movptr(Address(r15_thread, Thread::exception_file_offset()), rscratch1);
487 __ movl(Address(r15_thread, Thread::exception_line_offset()), (int) __LINE__);
488
489 // complete return to VM
490 assert(StubRoutines::_call_stub_return_address != nullptr,
491 "_call_stub_return_address must have been generated before");
492 __ jump(RuntimeAddress(StubRoutines::_call_stub_return_address));
493
494 // record the stub entry and end
495 store_archive_data(stub_id, start, __ pc());
496
497 return start;
498 }
499
500 // Continuation point for runtime calls returning with a pending
501 // exception. The pending exception check happened in the runtime
502 // or native call stub. The pending exception in Thread is
503 // converted into a Java-level exception.
504 //
505 // Contract with Java-level exception handlers:
506 // rax: exception
507 // rdx: throwing pc
508 //
509 // NOTE: At entry of this stub, exception-pc must be on stack !!
510
511 address StubGenerator::generate_forward_exception() {
512 StubId stub_id = StubId::stubgen_forward_exception_id;
513 int entry_count = StubInfo::entry_count(stub_id);
514 assert(entry_count == 1, "sanity check");
515 address start = load_archive_data(stub_id);
516 if (start != nullptr) {
517 return start;
518 }
519 StubCodeMark mark(this, stub_id);
520 start = __ pc();
521
522 // Upon entry, the sp points to the return address returning into
523 // Java (interpreted or compiled) code; i.e., the return address
524 // becomes the throwing pc.
525 //
526 // Arguments pushed before the runtime call are still on the stack
527 // but the exception handler will reset the stack pointer ->
528 // ignore them. A potential result in registers can be ignored as
529 // well.
530
531 #ifdef ASSERT
532 // make sure this code is only executed if there is a pending exception
533 {
534 Label L;
535 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
536 __ jcc(Assembler::notEqual, L);
537 __ stop("StubRoutines::forward exception: no pending exception (1)");
538 __ bind(L);
539 }
540 #endif
541
542 // compute exception handler into rbx
543 __ movptr(c_rarg0, Address(rsp, 0));
544 BLOCK_COMMENT("call exception_handler_for_return_address");
545 __ call_VM_leaf(CAST_FROM_FN_PTR(address,
546 SharedRuntime::exception_handler_for_return_address),
547 r15_thread, c_rarg0);
548 __ mov(rbx, rax);
549
550 // setup rax & rdx, remove return address & clear pending exception
551 __ pop(rdx);
552 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset()));
553 __ movptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
554
555 #ifdef ASSERT
556 // make sure exception is set
557 {
558 Label L;
559 __ testptr(rax, rax);
560 __ jcc(Assembler::notEqual, L);
561 __ stop("StubRoutines::forward exception: no pending exception (2)");
562 __ bind(L);
563 }
564 #endif
565
566 // continue at exception handler (return address removed)
567 // rax: exception
568 // rbx: exception handler
569 // rdx: throwing pc
570 __ verify_oop(rax);
571 __ jmp(rbx);
572
573 // record the stub entry and end
574 store_archive_data(stub_id, start, __ pc());
575
576 return start;
577 }
578
579 // Support for intptr_t OrderAccess::fence()
580 //
581 // Arguments :
582 //
583 // Result:
584 address StubGenerator::generate_orderaccess_fence() {
585 StubId stub_id = StubId::stubgen_fence_id;
586 int entry_count = StubInfo::entry_count(stub_id);
587 assert(entry_count == 1, "sanity check");
588 address start = load_archive_data(stub_id);
589 if (start != nullptr) {
590 return start;
591 }
592 StubCodeMark mark(this, stub_id);
593 start = __ pc();
594
595 __ membar(Assembler::StoreLoad);
596 __ ret(0);
597
598 // record the stub entry and end
599 store_archive_data(stub_id, start, __ pc());
600
601 return start;
602 }
603
604
605 //----------------------------------------------------------------------------------------------------
606 // Support for void verify_mxcsr()
607 //
608 // This routine is used with -Xcheck:jni to verify that native
609 // JNI code does not return to Java code without restoring the
610 // MXCSR register to our expected state.
611
612 address StubGenerator::generate_verify_mxcsr() {
613 StubId stub_id = StubId::stubgen_verify_mxcsr_id;
614 int entry_count = StubInfo::entry_count(stub_id);
615 assert(entry_count == 1, "sanity check");
616 address start = load_archive_data(stub_id);
617 if (start != nullptr) {
618 return start;
619 }
620 StubCodeMark mark(this, stub_id);
621 start = __ pc();
622
623 const Address mxcsr_save(rsp, 0);
624
625 if (CheckJNICalls) {
626 Label ok_ret;
627 ExternalAddress mxcsr_std(StubRoutines::x86::addr_mxcsr_std());
628 __ push_ppx(rax);
629 __ subptr(rsp, wordSize); // allocate a temp location
630 __ cmp32_mxcsr_std(mxcsr_save, rax, rscratch1);
631 __ jcc(Assembler::equal, ok_ret);
632
633 __ warn("MXCSR changed by native JNI code, use -XX:+RestoreMXCSROnJNICall");
634
635 __ ldmxcsr(mxcsr_std, rscratch1);
636
637 __ bind(ok_ret);
638 __ addptr(rsp, wordSize);
639 __ pop_ppx(rax);
640 }
641
642 __ ret(0);
643
644 // record the stub entry and end
645 store_archive_data(stub_id, start, __ pc());
646
647 return start;
648 }
649
650 address StubGenerator::generate_f2i_fixup() {
651 StubId stub_id = StubId::stubgen_f2i_fixup_id;
652 int entry_count = StubInfo::entry_count(stub_id);
653 assert(entry_count == 1, "sanity check");
654 address start = load_archive_data(stub_id);
655 if (start != nullptr) {
656 return start;
657 }
658 StubCodeMark mark(this, stub_id);
659 Address inout(rsp, 5 * wordSize); // return address + 4 saves
660
661 start = __ pc();
662
663 Label L;
664
665 __ push_ppx(rax);
666 __ push_ppx(c_rarg3);
667 __ push_ppx(c_rarg2);
668 __ push_ppx(c_rarg1);
669
670 __ movl(rax, 0x7f800000);
671 __ xorl(c_rarg3, c_rarg3);
672 __ movl(c_rarg2, inout);
673 __ movl(c_rarg1, c_rarg2);
674 __ andl(c_rarg1, 0x7fffffff);
675 __ cmpl(rax, c_rarg1); // NaN? -> 0
676 __ jcc(Assembler::negative, L);
677 __ testl(c_rarg2, c_rarg2); // signed ? min_jint : max_jint
678 __ movl(c_rarg3, 0x80000000);
679 __ movl(rax, 0x7fffffff);
680 __ cmovl(Assembler::positive, c_rarg3, rax);
681
682 __ bind(L);
683 __ movptr(inout, c_rarg3);
684
685 __ pop_ppx(c_rarg1);
686 __ pop_ppx(c_rarg2);
687 __ pop_ppx(c_rarg3);
688 __ pop_ppx(rax);
689
690 __ ret(0);
691
692 // record the stub entry and end
693 store_archive_data(stub_id, start, __ pc());
694
695 return start;
696 }
697
698 address StubGenerator::generate_f2l_fixup() {
699 StubId stub_id = StubId::stubgen_f2l_fixup_id;
700 int entry_count = StubInfo::entry_count(stub_id);
701 assert(entry_count == 1, "sanity check");
702 address start = load_archive_data(stub_id);
703 if (start != nullptr) {
704 return start;
705 }
706 StubCodeMark mark(this, stub_id);
707 Address inout(rsp, 5 * wordSize); // return address + 4 saves
708 start = __ pc();
709
710 Label L;
711
712 __ push_ppx(rax);
713 __ push_ppx(c_rarg3);
714 __ push_ppx(c_rarg2);
715 __ push_ppx(c_rarg1);
716
717 __ movl(rax, 0x7f800000);
718 __ xorl(c_rarg3, c_rarg3);
719 __ movl(c_rarg2, inout);
720 __ movl(c_rarg1, c_rarg2);
721 __ andl(c_rarg1, 0x7fffffff);
722 __ cmpl(rax, c_rarg1); // NaN? -> 0
723 __ jcc(Assembler::negative, L);
724 __ testl(c_rarg2, c_rarg2); // signed ? min_jlong : max_jlong
725 __ mov64(c_rarg3, 0x8000000000000000);
726 __ mov64(rax, 0x7fffffffffffffff);
727 __ cmov(Assembler::positive, c_rarg3, rax);
728
729 __ bind(L);
730 __ movptr(inout, c_rarg3);
731
732 __ pop_ppx(c_rarg1);
733 __ pop_ppx(c_rarg2);
734 __ pop_ppx(c_rarg3);
735 __ pop_ppx(rax);
736
737 __ ret(0);
738
739 // record the stub entry and end
740 store_archive_data(stub_id, start, __ pc());
741
742 return start;
743 }
744
745 address StubGenerator::generate_d2i_fixup() {
746 StubId stub_id = StubId::stubgen_d2i_fixup_id;
747 int entry_count = StubInfo::entry_count(stub_id);
748 assert(entry_count == 1, "sanity check");
749 address start = load_archive_data(stub_id);
750 if (start != nullptr) {
751 return start;
752 }
753 StubCodeMark mark(this, stub_id);
754 Address inout(rsp, 6 * wordSize); // return address + 5 saves
755
756 start = __ pc();
757
758 Label L;
759
760 __ push_ppx(rax);
761 __ push_ppx(c_rarg3);
762 __ push_ppx(c_rarg2);
763 __ push_ppx(c_rarg1);
764 __ push_ppx(c_rarg0);
765
766 __ movl(rax, 0x7ff00000);
767 __ movq(c_rarg2, inout);
768 __ movl(c_rarg3, c_rarg2);
769 __ mov(c_rarg1, c_rarg2);
770 __ mov(c_rarg0, c_rarg2);
771 __ negl(c_rarg3);
772 __ shrptr(c_rarg1, 0x20);
773 __ orl(c_rarg3, c_rarg2);
774 __ andl(c_rarg1, 0x7fffffff);
775 __ xorl(c_rarg2, c_rarg2);
776 __ shrl(c_rarg3, 0x1f);
777 __ orl(c_rarg1, c_rarg3);
778 __ cmpl(rax, c_rarg1);
779 __ jcc(Assembler::negative, L); // NaN -> 0
780 __ testptr(c_rarg0, c_rarg0); // signed ? min_jint : max_jint
781 __ movl(c_rarg2, 0x80000000);
782 __ movl(rax, 0x7fffffff);
783 __ cmov(Assembler::positive, c_rarg2, rax);
784
785 __ bind(L);
786 __ movptr(inout, c_rarg2);
787
788 __ pop_ppx(c_rarg0);
789 __ pop_ppx(c_rarg1);
790 __ pop_ppx(c_rarg2);
791 __ pop_ppx(c_rarg3);
792 __ pop_ppx(rax);
793
794 __ ret(0);
795
796 // record the stub entry and end
797 store_archive_data(stub_id, start, __ pc());
798
799 return start;
800 }
801
802 address StubGenerator::generate_d2l_fixup() {
803 StubId stub_id = StubId::stubgen_d2l_fixup_id;
804 int entry_count = StubInfo::entry_count(stub_id);
805 assert(entry_count == 1, "sanity check");
806 address start = load_archive_data(stub_id);
807 if (start != nullptr) {
808 return start;
809 }
810 StubCodeMark mark(this, stub_id);
811 Address inout(rsp, 6 * wordSize); // return address + 5 saves
812
813 start = __ pc();
814
815 Label L;
816
817 __ push_ppx(rax);
818 __ push_ppx(c_rarg3);
819 __ push_ppx(c_rarg2);
820 __ push_ppx(c_rarg1);
821 __ push_ppx(c_rarg0);
822
823 __ movl(rax, 0x7ff00000);
824 __ movq(c_rarg2, inout);
825 __ movl(c_rarg3, c_rarg2);
826 __ mov(c_rarg1, c_rarg2);
827 __ mov(c_rarg0, c_rarg2);
828 __ negl(c_rarg3);
829 __ shrptr(c_rarg1, 0x20);
830 __ orl(c_rarg3, c_rarg2);
831 __ andl(c_rarg1, 0x7fffffff);
832 __ xorl(c_rarg2, c_rarg2);
833 __ shrl(c_rarg3, 0x1f);
834 __ orl(c_rarg1, c_rarg3);
835 __ cmpl(rax, c_rarg1);
836 __ jcc(Assembler::negative, L); // NaN -> 0
837 __ testq(c_rarg0, c_rarg0); // signed ? min_jlong : max_jlong
838 __ mov64(c_rarg2, 0x8000000000000000);
839 __ mov64(rax, 0x7fffffffffffffff);
840 __ cmovq(Assembler::positive, c_rarg2, rax);
841
842 __ bind(L);
843 __ movq(inout, c_rarg2);
844
845 __ pop_ppx(c_rarg0);
846 __ pop_ppx(c_rarg1);
847 __ pop_ppx(c_rarg2);
848 __ pop_ppx(c_rarg3);
849 __ pop_ppx(rax);
850
851 __ ret(0);
852
853 // record the stub entry and end
854 store_archive_data(stub_id, start, __ pc());
855
856 return start;
857 }
858
859 address StubGenerator::generate_count_leading_zeros_lut() {
860 StubId stub_id = StubId::stubgen_vector_count_leading_zeros_lut_id;
861 int entry_count = StubInfo::entry_count(stub_id);
862 assert(entry_count == 1, "sanity check");
863 address start = load_archive_data(stub_id);
864 if (start != nullptr) {
865 return start;
866 }
867 __ align64();
868 StubCodeMark mark(this, stub_id);
869 start = __ pc();
870
871 __ emit_data64(0x0101010102020304, relocInfo::none);
872 __ emit_data64(0x0000000000000000, relocInfo::none);
873 __ emit_data64(0x0101010102020304, relocInfo::none);
874 __ emit_data64(0x0000000000000000, relocInfo::none);
875 __ emit_data64(0x0101010102020304, relocInfo::none);
876 __ emit_data64(0x0000000000000000, relocInfo::none);
877 __ emit_data64(0x0101010102020304, relocInfo::none);
878 __ emit_data64(0x0000000000000000, relocInfo::none);
879
880 // record the stub entry and end
881 store_archive_data(stub_id, start, __ pc());
882
883 return start;
884 }
885
886 address StubGenerator::generate_popcount_avx_lut() {
887 StubId stub_id = StubId::stubgen_vector_popcount_lut_id;
888 int entry_count = StubInfo::entry_count(stub_id);
889 assert(entry_count == 1, "sanity check");
890 address start = load_archive_data(stub_id);
891 if (start != nullptr) {
892 return start;
893 }
894 __ align64();
895 StubCodeMark mark(this, stub_id);
896 start = __ pc();
897
898 __ emit_data64(0x0302020102010100, relocInfo::none);
899 __ emit_data64(0x0403030203020201, relocInfo::none);
900 __ emit_data64(0x0302020102010100, relocInfo::none);
901 __ emit_data64(0x0403030203020201, relocInfo::none);
902 __ emit_data64(0x0302020102010100, relocInfo::none);
903 __ emit_data64(0x0403030203020201, relocInfo::none);
904 __ emit_data64(0x0302020102010100, relocInfo::none);
905 __ emit_data64(0x0403030203020201, relocInfo::none);
906
907 // record the stub entry and end
908 store_archive_data(stub_id, start, __ pc());
909
910 return start;
911 }
912
913 void StubGenerator::generate_iota_indices() {
914 StubId stub_id = StubId::stubgen_vector_iota_indices_id;
915 GrowableArray<address> entries;
916 int entry_count = StubInfo::entry_count(stub_id);
917 assert(entry_count == VECTOR_IOTA_COUNT, "sanity check");
918 address start = load_archive_data(stub_id, &entries);
919 if (start != nullptr) {
920 assert(entries.length() == VECTOR_IOTA_COUNT - 1,
921 "unexpected extra entry count %d", entries.length());
922 StubRoutines::x86::_vector_iota_indices[0] = start;
923 for (int i = 1; i < VECTOR_IOTA_COUNT; i++) {
924 StubRoutines::x86::_vector_iota_indices[i] = entries.at(i - 1);
925 }
926 return;
927 }
928 __ align(CodeEntryAlignment);
929 StubCodeMark mark(this, stub_id);
930 start = __ pc();
931 // B
932 __ emit_data64(0x0706050403020100, relocInfo::none);
933 __ emit_data64(0x0F0E0D0C0B0A0908, relocInfo::none);
934 __ emit_data64(0x1716151413121110, relocInfo::none);
935 __ emit_data64(0x1F1E1D1C1B1A1918, relocInfo::none);
936 __ emit_data64(0x2726252423222120, relocInfo::none);
937 __ emit_data64(0x2F2E2D2C2B2A2928, relocInfo::none);
938 __ emit_data64(0x3736353433323130, relocInfo::none);
939 __ emit_data64(0x3F3E3D3C3B3A3938, relocInfo::none);
940 entries.append(__ pc());
941 // W
942 __ emit_data64(0x0003000200010000, relocInfo::none);
943 __ emit_data64(0x0007000600050004, relocInfo::none);
944 __ emit_data64(0x000B000A00090008, relocInfo::none);
945 __ emit_data64(0x000F000E000D000C, relocInfo::none);
946 __ emit_data64(0x0013001200110010, relocInfo::none);
947 __ emit_data64(0x0017001600150014, relocInfo::none);
948 __ emit_data64(0x001B001A00190018, relocInfo::none);
949 __ emit_data64(0x001F001E001D001C, relocInfo::none);
950 entries.append(__ pc());
951 // D
952 __ emit_data64(0x0000000100000000, relocInfo::none);
953 __ emit_data64(0x0000000300000002, relocInfo::none);
954 __ emit_data64(0x0000000500000004, relocInfo::none);
955 __ emit_data64(0x0000000700000006, relocInfo::none);
956 __ emit_data64(0x0000000900000008, relocInfo::none);
957 __ emit_data64(0x0000000B0000000A, relocInfo::none);
958 __ emit_data64(0x0000000D0000000C, relocInfo::none);
959 __ emit_data64(0x0000000F0000000E, relocInfo::none);
960 entries.append(__ pc());
961 // Q
962 __ emit_data64(0x0000000000000000, relocInfo::none);
963 __ emit_data64(0x0000000000000001, relocInfo::none);
964 __ emit_data64(0x0000000000000002, relocInfo::none);
965 __ emit_data64(0x0000000000000003, relocInfo::none);
966 __ emit_data64(0x0000000000000004, relocInfo::none);
967 __ emit_data64(0x0000000000000005, relocInfo::none);
968 __ emit_data64(0x0000000000000006, relocInfo::none);
969 __ emit_data64(0x0000000000000007, relocInfo::none);
970 entries.append(__ pc());
971 // D - FP
972 __ emit_data64(0x3F80000000000000, relocInfo::none); // 0.0f, 1.0f
973 __ emit_data64(0x4040000040000000, relocInfo::none); // 2.0f, 3.0f
974 __ emit_data64(0x40A0000040800000, relocInfo::none); // 4.0f, 5.0f
975 __ emit_data64(0x40E0000040C00000, relocInfo::none); // 6.0f, 7.0f
976 __ emit_data64(0x4110000041000000, relocInfo::none); // 8.0f, 9.0f
977 __ emit_data64(0x4130000041200000, relocInfo::none); // 10.0f, 11.0f
978 __ emit_data64(0x4150000041400000, relocInfo::none); // 12.0f, 13.0f
979 __ emit_data64(0x4170000041600000, relocInfo::none); // 14.0f, 15.0f
980 entries.append(__ pc());
981 // Q - FP
982 __ emit_data64(0x0000000000000000, relocInfo::none); // 0.0d
983 __ emit_data64(0x3FF0000000000000, relocInfo::none); // 1.0d
984 __ emit_data64(0x4000000000000000, relocInfo::none); // 2.0d
985 __ emit_data64(0x4008000000000000, relocInfo::none); // 3.0d
986 __ emit_data64(0x4010000000000000, relocInfo::none); // 4.0d
987 __ emit_data64(0x4014000000000000, relocInfo::none); // 5.0d
988 __ emit_data64(0x4018000000000000, relocInfo::none); // 6.0d
989 __ emit_data64(0x401c000000000000, relocInfo::none); // 7.0d
990
991 // record the stub entry and end
992 store_archive_data(stub_id, start, __ pc(), &entries);
993
994 // install the entry addresses in the entry array
995 assert(entries.length() == entry_count - 1,
996 "unexpected entries count %d", entries.length());
997 StubRoutines::x86::_vector_iota_indices[0] = start;
998 for (int i = 1; i < VECTOR_IOTA_COUNT; i++) {
999 StubRoutines::x86::_vector_iota_indices[i] = entries.at(i - 1);
1000 }
1001 }
1002
1003 address StubGenerator::generate_vector_reverse_bit_lut() {
1004 StubId stub_id = StubId::stubgen_vector_reverse_bit_lut_id;
1005 int entry_count = StubInfo::entry_count(stub_id);
1006 assert(entry_count == 1, "sanity check");
1007 address start = load_archive_data(stub_id);
1008 if (start != nullptr) {
1009 return start;
1010 }
1011 __ align(CodeEntryAlignment);
1012 StubCodeMark mark(this, stub_id);
1013 start = __ pc();
1014
1015 __ emit_data64(0x0E060A020C040800, relocInfo::none);
1016 __ emit_data64(0x0F070B030D050901, relocInfo::none);
1017 __ emit_data64(0x0E060A020C040800, relocInfo::none);
1018 __ emit_data64(0x0F070B030D050901, relocInfo::none);
1019 __ emit_data64(0x0E060A020C040800, relocInfo::none);
1020 __ emit_data64(0x0F070B030D050901, relocInfo::none);
1021 __ emit_data64(0x0E060A020C040800, relocInfo::none);
1022 __ emit_data64(0x0F070B030D050901, relocInfo::none);
1023
1024 // record the stub entry and end
1025 store_archive_data(stub_id, start, __ pc());
1026
1027 return start;
1028 }
1029
1030 address StubGenerator::generate_vector_reverse_byte_perm_mask_long() {
1031 StubId stub_id = StubId::stubgen_vector_reverse_byte_perm_mask_long_id;
1032 int entry_count = StubInfo::entry_count(stub_id);
1033 assert(entry_count == 1, "sanity check");
1034 address start = load_archive_data(stub_id);
1035 if (start != nullptr) {
1036 return start;
1037 }
1038 __ align(CodeEntryAlignment);
1039 StubCodeMark mark(this, stub_id);
1040 start = __ pc();
1041
1042 __ emit_data64(0x0001020304050607, relocInfo::none);
1043 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
1044 __ emit_data64(0x0001020304050607, relocInfo::none);
1045 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
1046 __ emit_data64(0x0001020304050607, relocInfo::none);
1047 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
1048 __ emit_data64(0x0001020304050607, relocInfo::none);
1049 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
1050
1051 // record the stub entry and end
1052 store_archive_data(stub_id, start, __ pc());
1053
1054 return start;
1055 }
1056
1057 address StubGenerator::generate_vector_reverse_byte_perm_mask_int() {
1058 StubId stub_id = StubId::stubgen_vector_reverse_byte_perm_mask_int_id;
1059 int entry_count = StubInfo::entry_count(stub_id);
1060 assert(entry_count == 1, "sanity check");
1061 address start = load_archive_data(stub_id);
1062 if (start != nullptr) {
1063 return start;
1064 }
1065 __ align(CodeEntryAlignment);
1066 StubCodeMark mark(this, stub_id);
1067 start = __ pc();
1068
1069 __ emit_data64(0x0405060700010203, relocInfo::none);
1070 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
1071 __ emit_data64(0x0405060700010203, relocInfo::none);
1072 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
1073 __ emit_data64(0x0405060700010203, relocInfo::none);
1074 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
1075 __ emit_data64(0x0405060700010203, relocInfo::none);
1076 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
1077
1078 // record the stub entry and end
1079 store_archive_data(stub_id, start, __ pc());
1080
1081 return start;
1082 }
1083
1084 address StubGenerator::generate_vector_reverse_byte_perm_mask_short() {
1085 StubId stub_id = StubId::stubgen_vector_reverse_byte_perm_mask_short_id;
1086 int entry_count = StubInfo::entry_count(stub_id);
1087 assert(entry_count == 1, "sanity check");
1088 address start = load_archive_data(stub_id);
1089 if (start != nullptr) {
1090 return start;
1091 }
1092 __ align(CodeEntryAlignment);
1093 StubCodeMark mark(this, stub_id);
1094 start = __ pc();
1095
1096 __ emit_data64(0x0607040502030001, relocInfo::none);
1097 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
1098 __ emit_data64(0x0607040502030001, relocInfo::none);
1099 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
1100 __ emit_data64(0x0607040502030001, relocInfo::none);
1101 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
1102 __ emit_data64(0x0607040502030001, relocInfo::none);
1103 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
1104
1105 // record the stub entry and end
1106 store_archive_data(stub_id, start, __ pc());
1107
1108 return start;
1109 }
1110
1111 address StubGenerator::generate_vector_byte_shuffle_mask() {
1112 StubId stub_id = StubId::stubgen_vector_byte_shuffle_mask_id;
1113 int entry_count = StubInfo::entry_count(stub_id);
1114 assert(entry_count == 1, "sanity check");
1115 address start = load_archive_data(stub_id);
1116 if (start != nullptr) {
1117 return start;
1118 }
1119 __ align(CodeEntryAlignment);
1120 StubCodeMark mark(this, stub_id);
1121 start = __ pc();
1122
1123 __ emit_data64(0x7070707070707070, relocInfo::none);
1124 __ emit_data64(0x7070707070707070, relocInfo::none);
1125 __ emit_data64(0xF0F0F0F0F0F0F0F0, relocInfo::none);
1126 __ emit_data64(0xF0F0F0F0F0F0F0F0, relocInfo::none);
1127
1128 // record the stub entry and end
1129 store_archive_data(stub_id, start, __ pc());
1130
1131 return start;
1132 }
1133
1134 address StubGenerator::generate_fp_mask(StubId stub_id, int64_t mask) {
1135 int entry_count = StubInfo::entry_count(stub_id);
1136 assert(entry_count == 1, "sanity check");
1137 address start = load_archive_data(stub_id);
1138 if (start != nullptr) {
1139 return start;
1140 }
1141 __ align(CodeEntryAlignment);
1142 StubCodeMark mark(this, stub_id);
1143 start = __ pc();
1144
1145 __ emit_data64( mask, relocInfo::none );
1146 __ emit_data64( mask, relocInfo::none );
1147
1148 // record the stub entry and end
1149 store_archive_data(stub_id, start, __ pc());
1150
1151 return start;
1152 }
1153
1154 address StubGenerator::generate_compress_perm_table(StubId stub_id) {
1155 int esize;
1156 switch (stub_id) {
1157 case StubId::stubgen_compress_perm_table32_id:
1158 esize = 32;
1159 break;
1160 case StubId::stubgen_compress_perm_table64_id:
1161 esize = 64;
1162 break;
1163 default:
1164 ShouldNotReachHere();
1165 }
1166 int entry_count = StubInfo::entry_count(stub_id);
1167 assert(entry_count == 1, "sanity check");
1168 address start = load_archive_data(stub_id);
1169 if (start != nullptr) {
1170 return start;
1171 }
1172 __ align(CodeEntryAlignment);
1173 StubCodeMark mark(this, stub_id);
1174 start = __ pc();
1175 if (esize == 32) {
1176 // Loop to generate 256 x 8 int compression permute index table. A row is
1177 // accessed using 8 bit index computed using vector mask. An entry in
1178 // a row holds either a valid permute index corresponding to set bit position
1179 // or a -1 (default) value.
1180 for (int mask = 0; mask < 256; mask++) {
1181 int ctr = 0;
1182 for (int j = 0; j < 8; j++) {
1183 if (mask & (1 << j)) {
1184 __ emit_data(j, relocInfo::none);
1185 ctr++;
1186 }
1187 }
1188 for (; ctr < 8; ctr++) {
1189 __ emit_data(-1, relocInfo::none);
1190 }
1191 }
1192 } else {
1193 assert(esize == 64, "");
1194 // Loop to generate 16 x 4 long compression permute index table. A row is
1195 // accessed using 4 bit index computed using vector mask. An entry in
1196 // a row holds either a valid permute index pair for a quadword corresponding
1197 // to set bit position or a -1 (default) value.
1198 for (int mask = 0; mask < 16; mask++) {
1199 int ctr = 0;
1200 for (int j = 0; j < 4; j++) {
1201 if (mask & (1 << j)) {
1202 __ emit_data(2 * j, relocInfo::none);
1203 __ emit_data(2 * j + 1, relocInfo::none);
1204 ctr++;
1205 }
1206 }
1207 for (; ctr < 4; ctr++) {
1208 __ emit_data64(-1L, relocInfo::none);
1209 }
1210 }
1211 }
1212 // record the stub entry and end
1213 store_archive_data(stub_id, start, __ pc());
1214
1215 return start;
1216 }
1217
1218 address StubGenerator::generate_expand_perm_table(StubId stub_id) {
1219 int esize;
1220 switch (stub_id) {
1221 case StubId::stubgen_expand_perm_table32_id:
1222 esize = 32;
1223 break;
1224 case StubId::stubgen_expand_perm_table64_id:
1225 esize = 64;
1226 break;
1227 default:
1228 ShouldNotReachHere();
1229 }
1230 int entry_count = StubInfo::entry_count(stub_id);
1231 assert(entry_count == 1, "sanity check");
1232 address start = load_archive_data(stub_id);
1233 if (start != nullptr) {
1234 return start;
1235 }
1236 __ align(CodeEntryAlignment);
1237 StubCodeMark mark(this, stub_id);
1238 start = __ pc();
1239 if (esize == 32) {
1240 // Loop to generate 256 x 8 int expand permute index table. A row is accessed
1241 // using 8 bit index computed using vector mask. An entry in a row holds either
1242 // a valid permute index (starting from least significant lane) placed at poisition
1243 // corresponding to set bit position or a -1 (default) value.
1244 for (int mask = 0; mask < 256; mask++) {
1245 int ctr = 0;
1246 for (int j = 0; j < 8; j++) {
1247 if (mask & (1 << j)) {
1248 __ emit_data(ctr++, relocInfo::none);
1249 } else {
1250 __ emit_data(-1, relocInfo::none);
1251 }
1252 }
1253 }
1254 } else {
1255 assert(esize == 64, "");
1256 // Loop to generate 16 x 4 long expand permute index table. A row is accessed
1257 // using 4 bit index computed using vector mask. An entry in a row holds either
1258 // a valid doubleword permute index pair representing a quadword index (starting
1259 // from least significant lane) placed at poisition corresponding to set bit
1260 // position or a -1 (default) value.
1261 for (int mask = 0; mask < 16; mask++) {
1262 int ctr = 0;
1263 for (int j = 0; j < 4; j++) {
1264 if (mask & (1 << j)) {
1265 __ emit_data(2 * ctr, relocInfo::none);
1266 __ emit_data(2 * ctr + 1, relocInfo::none);
1267 ctr++;
1268 } else {
1269 __ emit_data64(-1L, relocInfo::none);
1270 }
1271 }
1272 }
1273 }
1274 // record the stub entry and end
1275 store_archive_data(stub_id, start, __ pc());
1276
1277 return start;
1278 }
1279
1280 address StubGenerator::generate_vector_mask(StubId stub_id, int64_t mask) {
1281 int entry_count = StubInfo::entry_count(stub_id);
1282 assert(entry_count == 1, "sanity check");
1283 address start = load_archive_data(stub_id);
1284 if (start != nullptr) {
1285 return start;
1286 }
1287 __ align(CodeEntryAlignment);
1288 StubCodeMark mark(this, stub_id);
1289 start = __ pc();
1290
1291 __ emit_data64(mask, relocInfo::none);
1292 __ emit_data64(mask, relocInfo::none);
1293 __ emit_data64(mask, relocInfo::none);
1294 __ emit_data64(mask, relocInfo::none);
1295 __ emit_data64(mask, relocInfo::none);
1296 __ emit_data64(mask, relocInfo::none);
1297 __ emit_data64(mask, relocInfo::none);
1298 __ emit_data64(mask, relocInfo::none);
1299
1300 // record the stub entry and end
1301 store_archive_data(stub_id, start, __ pc());
1302
1303 return start;
1304 }
1305
1306 address StubGenerator::generate_vector_byte_perm_mask() {
1307 StubId stub_id = StubId::stubgen_vector_byte_perm_mask_id;
1308 int entry_count = StubInfo::entry_count(stub_id);
1309 assert(entry_count == 1, "sanity check");
1310 address start = load_archive_data(stub_id);
1311 if (start != nullptr) {
1312 return start;
1313 }
1314 __ align(CodeEntryAlignment);
1315 StubCodeMark mark(this, stub_id);
1316 start = __ pc();
1317
1318 __ emit_data64(0x0000000000000001, relocInfo::none);
1319 __ emit_data64(0x0000000000000003, relocInfo::none);
1320 __ emit_data64(0x0000000000000005, relocInfo::none);
1321 __ emit_data64(0x0000000000000007, relocInfo::none);
1322 __ emit_data64(0x0000000000000000, relocInfo::none);
1323 __ emit_data64(0x0000000000000002, relocInfo::none);
1324 __ emit_data64(0x0000000000000004, relocInfo::none);
1325 __ emit_data64(0x0000000000000006, relocInfo::none);
1326
1327 // record the stub entry and end
1328 store_archive_data(stub_id, start, __ pc());
1329
1330 return start;
1331 }
1332
1333 address StubGenerator::generate_vector_fp_mask(StubId stub_id, int64_t mask) {
1334 int entry_count = StubInfo::entry_count(stub_id);
1335 assert(entry_count == 1, "sanity check");
1336 address start = load_archive_data(stub_id);
1337 if (start != nullptr) {
1338 return start;
1339 }
1340 __ align(CodeEntryAlignment);
1341 StubCodeMark mark(this, stub_id);
1342 start = __ pc();
1343
1344 __ emit_data64(mask, relocInfo::none);
1345 __ emit_data64(mask, relocInfo::none);
1346 __ emit_data64(mask, relocInfo::none);
1347 __ emit_data64(mask, relocInfo::none);
1348 __ emit_data64(mask, relocInfo::none);
1349 __ emit_data64(mask, relocInfo::none);
1350 __ emit_data64(mask, relocInfo::none);
1351 __ emit_data64(mask, relocInfo::none);
1352
1353 // record the stub entry and end
1354 store_archive_data(stub_id, start, __ pc());
1355
1356 return start;
1357 }
1358
1359 address StubGenerator::generate_vector_custom_i32(StubId stub_id, Assembler::AvxVectorLen len,
1360 int32_t val0, int32_t val1, int32_t val2, int32_t val3,
1361 int32_t val4, int32_t val5, int32_t val6, int32_t val7,
1362 int32_t val8, int32_t val9, int32_t val10, int32_t val11,
1363 int32_t val12, int32_t val13, int32_t val14, int32_t val15) {
1364 int entry_count = StubInfo::entry_count(stub_id);
1365 assert(entry_count == 1, "sanity check");
1366 address start = load_archive_data(stub_id);
1367 if (start != nullptr) {
1368 return start;
1369 }
1370 __ align(CodeEntryAlignment);
1371 StubCodeMark mark(this, stub_id);
1372 start = __ pc();
1373
1374 assert(len != Assembler::AVX_NoVec, "vector len must be specified");
1375 __ emit_data(val0, relocInfo::none, 0);
1376 __ emit_data(val1, relocInfo::none, 0);
1377 __ emit_data(val2, relocInfo::none, 0);
1378 __ emit_data(val3, relocInfo::none, 0);
1379 if (len >= Assembler::AVX_256bit) {
1380 __ emit_data(val4, relocInfo::none, 0);
1381 __ emit_data(val5, relocInfo::none, 0);
1382 __ emit_data(val6, relocInfo::none, 0);
1383 __ emit_data(val7, relocInfo::none, 0);
1384 if (len >= Assembler::AVX_512bit) {
1385 __ emit_data(val8, relocInfo::none, 0);
1386 __ emit_data(val9, relocInfo::none, 0);
1387 __ emit_data(val10, relocInfo::none, 0);
1388 __ emit_data(val11, relocInfo::none, 0);
1389 __ emit_data(val12, relocInfo::none, 0);
1390 __ emit_data(val13, relocInfo::none, 0);
1391 __ emit_data(val14, relocInfo::none, 0);
1392 __ emit_data(val15, relocInfo::none, 0);
1393 }
1394 }
1395 // record the stub entry and end
1396 store_archive_data(stub_id, start, __ pc());
1397
1398 return start;
1399 }
1400
1401 // Non-destructive plausibility checks for oops
1402 //
1403 // Arguments:
1404 // all args on stack!
1405 //
1406 // Stack after saving c_rarg3:
1407 // [tos + 0]: saved c_rarg3
1408 // [tos + 1]: saved c_rarg2
1409 // [tos + 2]: saved r12 (several TemplateTable methods use it)
1410 // [tos + 3]: saved flags
1411 // [tos + 4]: return address
1412 // * [tos + 5]: error message (char*)
1413 // * [tos + 6]: object to verify (oop)
1414 // * [tos + 7]: saved rax - saved by caller and bashed
1415 // * [tos + 8]: saved r10 (rscratch1) - saved by caller
1416 // * = popped on exit
1417 address StubGenerator::generate_verify_oop() {
1418 StubId stub_id = StubId::stubgen_verify_oop_id;
1419 int entry_count = StubInfo::entry_count(stub_id);
1420 assert(entry_count == 1, "sanity check");
1421 address start = load_archive_data(stub_id);
1422 if (start != nullptr) {
1423 return start;
1424 }
1425 StubCodeMark mark(this, stub_id);
1426 start = __ pc();
1427
1428 Label exit, error;
1429
1430 __ pushf();
1431 __ incrementl(ExternalAddress((address) StubRoutines::verify_oop_count_addr()), rscratch1);
1432
1433 __ push_ppx(r12);
1434
1435 // save c_rarg2 and c_rarg3
1436 __ push_ppx(c_rarg2);
1437 __ push_ppx(c_rarg3);
1438
1439 enum {
1440 // After previous pushes.
1441 oop_to_verify = 6 * wordSize,
1442 saved_rax = 7 * wordSize,
1443 saved_r10 = 8 * wordSize,
1444
1445 // Before the call to MacroAssembler::debug(), see below.
1446 return_addr = 16 * wordSize,
1447 error_msg = 17 * wordSize
1448 };
1449
1450 // get object
1451 __ movptr(rax, Address(rsp, oop_to_verify));
1452
1453 // make sure object is 'reasonable'
1454 __ testptr(rax, rax);
1455 __ jcc(Assembler::zero, exit); // if obj is null it is OK
1456
1457 BarrierSetAssembler* bs_asm = BarrierSet::barrier_set()->barrier_set_assembler();
1458 bs_asm->check_oop(_masm, rax, c_rarg2, c_rarg3, error);
1459
1460 // return if everything seems ok
1461 __ bind(exit);
1462 __ movptr(rax, Address(rsp, saved_rax)); // get saved rax back
1463 __ movptr(rscratch1, Address(rsp, saved_r10)); // get saved r10 back
1464 __ pop_ppx(c_rarg3); // restore c_rarg3
1465 __ pop_ppx(c_rarg2); // restore c_rarg2
1466 __ pop_ppx(r12); // restore r12
1467 __ popf(); // restore flags
1468 __ ret(4 * wordSize); // pop caller saved stuff
1469
1470 // handle errors
1471 __ bind(error);
1472 __ movptr(rax, Address(rsp, saved_rax)); // get saved rax back
1473 __ movptr(rscratch1, Address(rsp, saved_r10)); // get saved r10 back
1474 __ pop_ppx(c_rarg3); // get saved c_rarg3 back
1475 __ pop_ppx(c_rarg2); // get saved c_rarg2 back
1476 __ pop_ppx(r12); // get saved r12 back
1477 __ popf(); // get saved flags off stack --
1478 // will be ignored
1479
1480 __ pusha(); // push registers
1481 // (rip is already
1482 // already pushed)
1483 // debug(char* msg, int64_t pc, int64_t regs[])
1484 // We've popped the registers we'd saved (c_rarg3, c_rarg2 and flags), and
1485 // pushed all the registers, so now the stack looks like:
1486 // [tos + 0] 16 saved registers
1487 // [tos + 16] return address
1488 // * [tos + 17] error message (char*)
1489 // * [tos + 18] object to verify (oop)
1490 // * [tos + 19] saved rax - saved by caller and bashed
1491 // * [tos + 20] saved r10 (rscratch1) - saved by caller
1492 // * = popped on exit
1493
1494 __ movptr(c_rarg0, Address(rsp, error_msg)); // pass address of error message
1495 __ movptr(c_rarg1, Address(rsp, return_addr)); // pass return address
1496 __ movq(c_rarg2, rsp); // pass address of regs on stack
1497 __ mov(r12, rsp); // remember rsp
1498 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1499 __ andptr(rsp, -16); // align stack as required by ABI
1500 BLOCK_COMMENT("call MacroAssembler::debug");
1501 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64)));
1502 __ hlt();
1503
1504 // record the stub entry and end
1505 store_archive_data(stub_id, start, __ pc());
1506
1507 return start;
1508 }
1509
1510
1511 // Shuffle first three arg regs on Windows into Linux/Solaris locations.
1512 //
1513 // Outputs:
1514 // rdi - rcx
1515 // rsi - rdx
1516 // rdx - r8
1517 // rcx - r9
1518 //
1519 // Registers r9 and r10 are used to save rdi and rsi on Windows, which latter
1520 // are non-volatile. r9 and r10 should not be used by the caller.
1521 //
1522 void StubGenerator::setup_arg_regs(int nargs) {
1523 const Register saved_rdi = r9;
1524 const Register saved_rsi = r10;
1525 assert(nargs == 3 || nargs == 4, "else fix");
1526 #ifdef _WIN64
1527 assert(c_rarg0 == rcx && c_rarg1 == rdx && c_rarg2 == r8 && c_rarg3 == r9,
1528 "unexpected argument registers");
1529 if (nargs == 4) {
1530 __ mov(rax, r9); // r9 is also saved_rdi
1531 }
1532 __ movptr(saved_rdi, rdi);
1533 __ movptr(saved_rsi, rsi);
1534 __ mov(rdi, rcx); // c_rarg0
1535 __ mov(rsi, rdx); // c_rarg1
1536 __ mov(rdx, r8); // c_rarg2
1537 if (nargs == 4) {
1538 __ mov(rcx, rax); // c_rarg3 (via rax)
1539 }
1540 #else
1541 assert(c_rarg0 == rdi && c_rarg1 == rsi && c_rarg2 == rdx && c_rarg3 == rcx,
1542 "unexpected argument registers");
1543 #endif
1544 DEBUG_ONLY(_regs_in_thread = false;)
1545 }
1546
1547
1548 void StubGenerator::restore_arg_regs() {
1549 assert(!_regs_in_thread, "wrong call to restore_arg_regs");
1550 const Register saved_rdi = r9;
1551 const Register saved_rsi = r10;
1552 #ifdef _WIN64
1553 __ movptr(rdi, saved_rdi);
1554 __ movptr(rsi, saved_rsi);
1555 #endif
1556 }
1557
1558
1559 // This is used in places where r10 is a scratch register, and can
1560 // be adapted if r9 is needed also.
1561 void StubGenerator::setup_arg_regs_using_thread(int nargs) {
1562 const Register saved_r15 = r9;
1563 assert(nargs == 3 || nargs == 4, "else fix");
1564 #ifdef _WIN64
1565 if (nargs == 4) {
1566 __ mov(rax, r9); // r9 is also saved_r15
1567 }
1568 __ mov(saved_r15, r15); // r15 is callee saved and needs to be restored
1569 __ get_thread_slow(r15_thread);
1570 assert(c_rarg0 == rcx && c_rarg1 == rdx && c_rarg2 == r8 && c_rarg3 == r9,
1571 "unexpected argument registers");
1572 __ movptr(Address(r15_thread, in_bytes(JavaThread::windows_saved_rdi_offset())), rdi);
1573 __ movptr(Address(r15_thread, in_bytes(JavaThread::windows_saved_rsi_offset())), rsi);
1574
1575 __ mov(rdi, rcx); // c_rarg0
1576 __ mov(rsi, rdx); // c_rarg1
1577 __ mov(rdx, r8); // c_rarg2
1578 if (nargs == 4) {
1579 __ mov(rcx, rax); // c_rarg3 (via rax)
1580 }
1581 #else
1582 assert(c_rarg0 == rdi && c_rarg1 == rsi && c_rarg2 == rdx && c_rarg3 == rcx,
1583 "unexpected argument registers");
1584 #endif
1585 DEBUG_ONLY(_regs_in_thread = true;)
1586 }
1587
1588
1589 void StubGenerator::restore_arg_regs_using_thread() {
1590 assert(_regs_in_thread, "wrong call to restore_arg_regs");
1591 const Register saved_r15 = r9;
1592 #ifdef _WIN64
1593 __ get_thread_slow(r15_thread);
1594 __ movptr(rsi, Address(r15_thread, in_bytes(JavaThread::windows_saved_rsi_offset())));
1595 __ movptr(rdi, Address(r15_thread, in_bytes(JavaThread::windows_saved_rdi_offset())));
1596 __ mov(r15, saved_r15); // r15 is callee saved and needs to be restored
1597 #endif
1598 }
1599
1600
1601 void StubGenerator::setup_argument_regs(BasicType type) {
1602 if (type == T_BYTE || type == T_SHORT) {
1603 setup_arg_regs(); // from => rdi, to => rsi, count => rdx
1604 // r9 and r10 may be used to save non-volatile registers
1605 } else {
1606 setup_arg_regs_using_thread(); // from => rdi, to => rsi, count => rdx
1607 // r9 is used to save r15_thread
1608 }
1609 }
1610
1611
1612 void StubGenerator::restore_argument_regs(BasicType type) {
1613 if (type == T_BYTE || type == T_SHORT) {
1614 restore_arg_regs();
1615 } else {
1616 restore_arg_regs_using_thread();
1617 }
1618 }
1619
1620 address StubGenerator::generate_data_cache_writeback() {
1621 const Register src = c_rarg0; // source address
1622 StubId stub_id = StubId::stubgen_data_cache_writeback_id;
1623 int entry_count = StubInfo::entry_count(stub_id);
1624 assert(entry_count == 1, "sanity check");
1625 address start = load_archive_data(stub_id);
1626 if (start != nullptr) {
1627 return start;
1628 }
1629 __ align(CodeEntryAlignment);
1630 StubCodeMark mark(this, stub_id);
1631
1632 start = __ pc();
1633
1634 __ enter();
1635 __ cache_wb(Address(src, 0));
1636 __ leave();
1637 __ ret(0);
1638
1639 // record the stub entry and end
1640 store_archive_data(stub_id, start, __ pc());
1641
1642 return start;
1643 }
1644
1645 address StubGenerator::generate_data_cache_writeback_sync() {
1646 const Register is_pre = c_rarg0; // pre or post sync
1647 StubId stub_id = StubId::stubgen_data_cache_writeback_sync_id;
1648 int entry_count = StubInfo::entry_count(stub_id);
1649 assert(entry_count == 1, "sanity check");
1650 address start = load_archive_data(stub_id);
1651 if (start != nullptr) {
1652 return start;
1653 }
1654 __ align(CodeEntryAlignment);
1655 StubCodeMark mark(this, stub_id);
1656
1657 // pre wbsync is a no-op
1658 // post wbsync translates to an sfence
1659
1660 Label skip;
1661 start = __ pc();
1662
1663 __ enter();
1664 __ cmpl(is_pre, 0);
1665 __ jcc(Assembler::notEqual, skip);
1666 __ cache_wbsync(false);
1667 __ bind(skip);
1668 __ leave();
1669 __ ret(0);
1670
1671 // record the stub entry and end
1672 store_archive_data(stub_id, start, __ pc());
1673
1674 return start;
1675 }
1676
1677 // ofs and limit are use for multi-block byte array.
1678 // int com.sun.security.provider.MD5.implCompress(byte[] b, int ofs)
1679 address StubGenerator::generate_md5_implCompress(StubId stub_id) {
1680 bool multi_block;
1681 switch (stub_id) {
1682 case StubId::stubgen_md5_implCompress_id:
1683 multi_block = false;
1684 break;
1685 case StubId::stubgen_md5_implCompressMB_id:
1686 multi_block = true;
1687 break;
1688 default:
1689 ShouldNotReachHere();
1690 }
1691 int entry_count = StubInfo::entry_count(stub_id);
1692 assert(entry_count == 1, "sanity check");
1693 address start = load_archive_data(stub_id);
1694 if (start != nullptr) {
1695 return start;
1696 }
1697 __ align(CodeEntryAlignment);
1698 StubCodeMark mark(this, stub_id);
1699 start = __ pc();
1700
1701 const Register buf_param = r15;
1702 const Address state_param(rsp, 0 * wordSize);
1703 const Address ofs_param (rsp, 1 * wordSize );
1704 const Address limit_param(rsp, 1 * wordSize + 4);
1705
1706 __ enter();
1707 __ push_ppx(rbx);
1708 __ push_ppx(rdi);
1709 __ push_ppx(rsi);
1710 __ push_ppx(r15);
1711 __ subptr(rsp, 2 * wordSize);
1712
1713 __ movptr(buf_param, c_rarg0);
1714 __ movptr(state_param, c_rarg1);
1715 if (multi_block) {
1716 __ movl(ofs_param, c_rarg2);
1717 __ movl(limit_param, c_rarg3);
1718 }
1719 __ fast_md5(buf_param, state_param, ofs_param, limit_param, multi_block);
1720
1721 __ addptr(rsp, 2 * wordSize);
1722 __ pop_ppx(r15);
1723 __ pop_ppx(rsi);
1724 __ pop_ppx(rdi);
1725 __ pop_ppx(rbx);
1726 __ leave();
1727 __ ret(0);
1728
1729 // record the stub entry and end
1730 store_archive_data(stub_id, start, __ pc());
1731
1732 return start;
1733 }
1734
1735 address StubGenerator::generate_upper_word_mask() {
1736 StubId stub_id = StubId::stubgen_upper_word_mask_id;
1737 int entry_count = StubInfo::entry_count(stub_id);
1738 assert(entry_count == 1, "sanity check");
1739 address start = load_archive_data(stub_id);
1740 if (start != nullptr) {
1741 return start;
1742 }
1743 __ align64();
1744 StubCodeMark mark(this, stub_id);
1745 start = __ pc();
1746
1747 __ emit_data64(0x0000000000000000, relocInfo::none);
1748 __ emit_data64(0xFFFFFFFF00000000, relocInfo::none);
1749
1750 // record the stub entry and end
1751 store_archive_data(stub_id, start, __ pc());
1752
1753 return start;
1754 }
1755
1756 address StubGenerator::generate_shuffle_byte_flip_mask() {
1757 StubId stub_id = StubId::stubgen_shuffle_byte_flip_mask_id;
1758 int entry_count = StubInfo::entry_count(stub_id);
1759 assert(entry_count == 1, "sanity check");
1760 address start = load_archive_data(stub_id);
1761 if (start != nullptr) {
1762 return start;
1763 }
1764 __ align64();
1765 StubCodeMark mark(this, stub_id);
1766 start = __ pc();
1767
1768 __ emit_data64(0x08090a0b0c0d0e0f, relocInfo::none);
1769 __ emit_data64(0x0001020304050607, relocInfo::none);
1770
1771 // record the stub entry and end
1772 store_archive_data(stub_id, start, __ pc());
1773
1774 return start;
1775 }
1776
1777 // ofs and limit are use for multi-block byte array.
1778 // int com.sun.security.provider.DigestBase.implCompressMultiBlock(byte[] b, int ofs, int limit)
1779 address StubGenerator::generate_sha1_implCompress(StubId stub_id) {
1780 bool multi_block;
1781 switch (stub_id) {
1782 case StubId::stubgen_sha1_implCompress_id:
1783 multi_block = false;
1784 break;
1785 case StubId::stubgen_sha1_implCompressMB_id:
1786 multi_block = true;
1787 break;
1788 default:
1789 ShouldNotReachHere();
1790 }
1791 int entry_count = StubInfo::entry_count(stub_id);
1792 assert(entry_count == 1, "sanity check");
1793 address start = load_archive_data(stub_id);
1794 if (start != nullptr) {
1795 return start;
1796 }
1797 __ align(CodeEntryAlignment);
1798 StubCodeMark mark(this, stub_id);
1799 start = __ pc();
1800
1801 Register buf = c_rarg0;
1802 Register state = c_rarg1;
1803 Register ofs = c_rarg2;
1804 Register limit = c_rarg3;
1805
1806 const XMMRegister abcd = xmm0;
1807 const XMMRegister e0 = xmm1;
1808 const XMMRegister e1 = xmm2;
1809 const XMMRegister msg0 = xmm3;
1810
1811 const XMMRegister msg1 = xmm4;
1812 const XMMRegister msg2 = xmm5;
1813 const XMMRegister msg3 = xmm6;
1814 const XMMRegister shuf_mask = xmm7;
1815
1816 __ enter();
1817
1818 __ subptr(rsp, 4 * wordSize);
1819
1820 __ fast_sha1(abcd, e0, e1, msg0, msg1, msg2, msg3, shuf_mask,
1821 buf, state, ofs, limit, rsp, multi_block);
1822
1823 __ addptr(rsp, 4 * wordSize);
1824
1825 __ leave();
1826 __ ret(0);
1827
1828 // record the stub entry and end
1829 store_archive_data(stub_id, start, __ pc());
1830
1831 return start;
1832 }
1833
1834 address StubGenerator::generate_pshuffle_byte_flip_mask(address& entry_00ba, address& entry_dc00) {
1835 StubId stub_id = StubId::stubgen_pshuffle_byte_flip_mask_id;
1836 GrowableArray<address> entries;
1837 int entry_count = StubInfo::entry_count(stub_id);
1838 assert(entry_count == 3, "sanity check");
1839 address start = load_archive_data(stub_id, &entries);
1840 if (start != nullptr) {
1841 assert(entries.length() == entry_count - 1,
1842 "unexpected extra entry count %d", entries.length());
1843 entry_00ba = entries.at(0);
1844 entry_dc00 = entries.at(1);
1845 assert(VM_Version::supports_avx2() == (entry_00ba != nullptr && entry_dc00 != nullptr),
1846 "entries cannot be null when avx2 is enabled");
1847 return start;
1848 }
1849 __ align64();
1850 StubCodeMark mark(this, stub_id);
1851 start = __ pc();
1852 address entry2 = nullptr;
1853 address entry3 = nullptr;
1854 __ emit_data64(0x0405060700010203, relocInfo::none);
1855 __ emit_data64(0x0c0d0e0f08090a0b, relocInfo::none);
1856
1857 if (VM_Version::supports_avx2()) {
1858 __ emit_data64(0x0405060700010203, relocInfo::none); // second copy
1859 __ emit_data64(0x0c0d0e0f08090a0b, relocInfo::none);
1860 // _SHUF_00BA
1861 entry2 = __ pc();
1862 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1863 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1864 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1865 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1866 // _SHUF_DC00
1867 entry3 = __ pc();
1868 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1869 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1870 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1871 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1872 }
1873 // have to track the 2nd and 3rd entries even if they are null
1874 entry_00ba = entry2;
1875 entries.push(entry_00ba);
1876 entry_dc00 = entry3;
1877 entries.push(entry_dc00);
1878
1879 // record the stub entry and end plus all the auxiliary entries
1880 store_archive_data(stub_id, start, __ pc(), &entries);
1881
1882 return start;
1883 }
1884
1885 //Mask for byte-swapping a couple of qwords in an XMM register using (v)pshufb.
1886 address StubGenerator::generate_pshuffle_byte_flip_mask_sha512(address& entry_ymm_lo) {
1887 StubId stub_id = StubId::stubgen_pshuffle_byte_flip_mask_sha512_id;
1888 GrowableArray<address> entries;
1889 int entry_count = StubInfo::entry_count(stub_id);
1890 assert(entry_count == 2, "sanity check");
1891 address start = load_archive_data(stub_id, &entries);
1892 if (start != nullptr) {
1893 assert(entries.length() == entry_count - 1,
1894 "unexpected extra entry count %d", entries.length());
1895 entry_ymm_lo = entries.at(0);
1896 assert(VM_Version::supports_avx2() == (entry_ymm_lo != nullptr),
1897 "entry cannot be null when avx2 is enabled");
1898 return start;
1899 }
1900 __ align32();
1901 StubCodeMark mark(this, stub_id);
1902 start = __ pc();
1903 address entry2 = nullptr;
1904 if (VM_Version::supports_avx2()) {
1905 __ emit_data64(0x0001020304050607, relocInfo::none); // PSHUFFLE_BYTE_FLIP_MASK
1906 __ emit_data64(0x08090a0b0c0d0e0f, relocInfo::none);
1907 __ emit_data64(0x1011121314151617, relocInfo::none);
1908 __ emit_data64(0x18191a1b1c1d1e1f, relocInfo::none);
1909 // capture 2nd entry
1910 entry2 = __ pc();
1911 __ emit_data64(0x0000000000000000, relocInfo::none); //MASK_YMM_LO
1912 __ emit_data64(0x0000000000000000, relocInfo::none);
1913 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1914 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1915 }
1916 // have to track the 2nd entry even if it is null
1917 entry_ymm_lo = entry2;
1918 entries.push(entry2);
1919 // record the stub entry and end
1920 store_archive_data(stub_id, start, __ pc(), &entries);
1921
1922 return start;
1923 }
1924
1925 // ofs and limit are use for multi-block byte array.
1926 // int com.sun.security.provider.DigestBase.implCompressMultiBlock(byte[] b, int ofs, int limit)
1927 address StubGenerator::generate_sha256_implCompress(StubId stub_id) {
1928 bool multi_block;
1929 switch (stub_id) {
1930 case StubId::stubgen_sha256_implCompress_id:
1931 multi_block = false;
1932 break;
1933 case StubId::stubgen_sha256_implCompressMB_id:
1934 multi_block = true;
1935 break;
1936 default:
1937 ShouldNotReachHere();
1938 }
1939 assert(VM_Version::supports_sha() || VM_Version::supports_avx2(), "");
1940 int entry_count = StubInfo::entry_count(stub_id);
1941 assert(entry_count == 1, "sanity check");
1942 address start = load_archive_data(stub_id);
1943 if (start != nullptr) {
1944 return start;
1945 }
1946 __ align(CodeEntryAlignment);
1947 StubCodeMark mark(this, stub_id);
1948 start = __ pc();
1949
1950 Register buf = c_rarg0;
1951 Register state = c_rarg1;
1952 Register ofs = c_rarg2;
1953 Register limit = c_rarg3;
1954
1955 const XMMRegister msg = xmm0;
1956 const XMMRegister state0 = xmm1;
1957 const XMMRegister state1 = xmm2;
1958 const XMMRegister msgtmp0 = xmm3;
1959
1960 const XMMRegister msgtmp1 = xmm4;
1961 const XMMRegister msgtmp2 = xmm5;
1962 const XMMRegister msgtmp3 = xmm6;
1963 const XMMRegister msgtmp4 = xmm7;
1964
1965 const XMMRegister shuf_mask = xmm8;
1966
1967 __ enter();
1968
1969 __ subptr(rsp, 4 * wordSize);
1970
1971 if (VM_Version::supports_sha()) {
1972 __ fast_sha256(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
1973 buf, state, ofs, limit, rsp, multi_block, shuf_mask);
1974 } else if (VM_Version::supports_avx2()) {
1975 __ sha256_AVX2(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
1976 buf, state, ofs, limit, rsp, multi_block, shuf_mask);
1977 }
1978 __ addptr(rsp, 4 * wordSize);
1979 __ vzeroupper();
1980 __ leave();
1981 __ ret(0);
1982
1983 // record the stub entry and end
1984 store_archive_data(stub_id, start, __ pc());
1985
1986 return start;
1987 }
1988
1989 address StubGenerator::generate_sha512_implCompress(StubId stub_id) {
1990 bool multi_block;
1991 switch (stub_id) {
1992 case StubId::stubgen_sha512_implCompress_id:
1993 multi_block = false;
1994 break;
1995 case StubId::stubgen_sha512_implCompressMB_id:
1996 multi_block = true;
1997 break;
1998 default:
1999 ShouldNotReachHere();
2000 }
2001 assert(VM_Version::supports_avx2(), "");
2002 assert(VM_Version::supports_bmi2() || VM_Version::supports_sha512(), "");
2003 int entry_count = StubInfo::entry_count(stub_id);
2004 assert(entry_count == 1, "sanity check");
2005 address start = load_archive_data(stub_id);
2006 if (start != nullptr) {
2007 return start;
2008 }
2009 __ align(CodeEntryAlignment);
2010 StubCodeMark mark(this, stub_id);
2011 start = __ pc();
2012
2013 Register buf = c_rarg0;
2014 Register state = c_rarg1;
2015 Register ofs = c_rarg2;
2016 Register limit = c_rarg3;
2017
2018 __ enter();
2019
2020 if (VM_Version::supports_sha512()) {
2021 __ sha512_update_ni_x1(state, buf, ofs, limit, multi_block);
2022 } else {
2023 const XMMRegister msg = xmm0;
2024 const XMMRegister state0 = xmm1;
2025 const XMMRegister state1 = xmm2;
2026 const XMMRegister msgtmp0 = xmm3;
2027 const XMMRegister msgtmp1 = xmm4;
2028 const XMMRegister msgtmp2 = xmm5;
2029 const XMMRegister msgtmp3 = xmm6;
2030 const XMMRegister msgtmp4 = xmm7;
2031
2032 const XMMRegister shuf_mask = xmm8;
2033 __ sha512_AVX2(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
2034 buf, state, ofs, limit, rsp, multi_block, shuf_mask);
2035 }
2036 __ vzeroupper();
2037 __ leave();
2038 __ ret(0);
2039
2040 // record the stub entry and end
2041 store_archive_data(stub_id, start, __ pc());
2042
2043 return start;
2044 }
2045
2046 address StubGenerator::base64_shuffle_addr() {
2047 StubId stub_id = StubId::stubgen_shuffle_base64_id;
2048 int entry_count = StubInfo::entry_count(stub_id);
2049 assert(entry_count == 1, "sanity check");
2050 address start = load_archive_data(stub_id);
2051 if (start != nullptr) {
2052 return start;
2053 }
2054 __ align64();
2055 StubCodeMark mark(this, stub_id);
2056 start = __ pc();
2057
2058 assert(((unsigned long long)start & 0x3f) == 0,
2059 "Alignment problem (0x%08llx)", (unsigned long long)start);
2060 __ emit_data64(0x0405030401020001, relocInfo::none);
2061 __ emit_data64(0x0a0b090a07080607, relocInfo::none);
2062 __ emit_data64(0x10110f100d0e0c0d, relocInfo::none);
2063 __ emit_data64(0x1617151613141213, relocInfo::none);
2064 __ emit_data64(0x1c1d1b1c191a1819, relocInfo::none);
2065 __ emit_data64(0x222321221f201e1f, relocInfo::none);
2066 __ emit_data64(0x2829272825262425, relocInfo::none);
2067 __ emit_data64(0x2e2f2d2e2b2c2a2b, relocInfo::none);
2068
2069 // record the stub entry and end
2070 store_archive_data(stub_id, start, __ pc());
2071
2072 return start;
2073 }
2074
2075 address StubGenerator::base64_avx2_shuffle_addr() {
2076 StubId stub_id = StubId::stubgen_avx2_shuffle_base64_id;
2077 int entry_count = StubInfo::entry_count(stub_id);
2078 assert(entry_count == 1, "sanity check");
2079 address start = load_archive_data(stub_id);
2080 if (start != nullptr) {
2081 return start;
2082 }
2083 __ align32();
2084 StubCodeMark mark(this, stub_id);
2085 start = __ pc();
2086
2087 __ emit_data64(0x0809070805060405, relocInfo::none);
2088 __ emit_data64(0x0e0f0d0e0b0c0a0b, relocInfo::none);
2089 __ emit_data64(0x0405030401020001, relocInfo::none);
2090 __ emit_data64(0x0a0b090a07080607, relocInfo::none);
2091
2092 // record the stub entry and end
2093 store_archive_data(stub_id, start, __ pc());
2094
2095 return start;
2096 }
2097
2098 address StubGenerator::base64_avx2_input_mask_addr() {
2099 StubId stub_id = StubId::stubgen_avx2_input_mask_base64_id;
2100 int entry_count = StubInfo::entry_count(stub_id);
2101 assert(entry_count == 1, "sanity check");
2102 address start = load_archive_data(stub_id);
2103 if (start != nullptr) {
2104 return start;
2105 }
2106 __ align32();
2107 StubCodeMark mark(this, stub_id);
2108 start = __ pc();
2109
2110 __ emit_data64(0x8000000000000000, relocInfo::none);
2111 __ emit_data64(0x8000000080000000, relocInfo::none);
2112 __ emit_data64(0x8000000080000000, relocInfo::none);
2113 __ emit_data64(0x8000000080000000, relocInfo::none);
2114
2115 // record the stub entry and end
2116 store_archive_data(stub_id, start, __ pc());
2117
2118 return start;
2119 }
2120
2121 address StubGenerator::base64_avx2_lut_addr() {
2122 StubId stub_id = StubId::stubgen_avx2_lut_base64_id;
2123 int entry_count = StubInfo::entry_count(stub_id);
2124 assert(entry_count == 1, "sanity check");
2125 address start = load_archive_data(stub_id);
2126 if (start != nullptr) {
2127 return start;
2128 }
2129 __ align32();
2130 StubCodeMark mark(this, stub_id);
2131 start = __ pc();
2132
2133 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
2134 __ emit_data64(0x0000f0edfcfcfcfc, relocInfo::none);
2135 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
2136 __ emit_data64(0x0000f0edfcfcfcfc, relocInfo::none);
2137
2138 // URL LUT
2139 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
2140 __ emit_data64(0x000020effcfcfcfc, relocInfo::none);
2141 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
2142 __ emit_data64(0x000020effcfcfcfc, relocInfo::none);
2143
2144 // record the stub entry and end
2145 store_archive_data(stub_id, start, __ pc());
2146
2147 return start;
2148 }
2149
2150 address StubGenerator::base64_encoding_table_addr() {
2151 StubId stub_id = StubId::stubgen_encoding_table_base64_id;
2152 int entry_count = StubInfo::entry_count(stub_id);
2153 assert(entry_count == 1, "sanity check");
2154 address start = load_archive_data(stub_id);
2155 if (start != nullptr) {
2156 return start;
2157 }
2158 __ align64();
2159 StubCodeMark mark(this, stub_id);
2160 start = __ pc();
2161
2162 assert(((unsigned long long)start & 0x3f) == 0, "Alignment problem (0x%08llx)", (unsigned long long)start);
2163 __ emit_data64(0x4847464544434241, relocInfo::none);
2164 __ emit_data64(0x504f4e4d4c4b4a49, relocInfo::none);
2165 __ emit_data64(0x5857565554535251, relocInfo::none);
2166 __ emit_data64(0x6665646362615a59, relocInfo::none);
2167 __ emit_data64(0x6e6d6c6b6a696867, relocInfo::none);
2168 __ emit_data64(0x767574737271706f, relocInfo::none);
2169 __ emit_data64(0x333231307a797877, relocInfo::none);
2170 __ emit_data64(0x2f2b393837363534, relocInfo::none);
2171
2172 // URL table
2173 __ emit_data64(0x4847464544434241, relocInfo::none);
2174 __ emit_data64(0x504f4e4d4c4b4a49, relocInfo::none);
2175 __ emit_data64(0x5857565554535251, relocInfo::none);
2176 __ emit_data64(0x6665646362615a59, relocInfo::none);
2177 __ emit_data64(0x6e6d6c6b6a696867, relocInfo::none);
2178 __ emit_data64(0x767574737271706f, relocInfo::none);
2179 __ emit_data64(0x333231307a797877, relocInfo::none);
2180 __ emit_data64(0x5f2d393837363534, relocInfo::none);
2181
2182 // record the stub entry and end
2183 store_archive_data(stub_id, start, __ pc());
2184
2185 return start;
2186 }
2187
2188 // Code for generating Base64 encoding.
2189 // Intrinsic function prototype in Base64.java:
2190 // private void encodeBlock(byte[] src, int sp, int sl, byte[] dst, int dp,
2191 // boolean isURL) {
2192 address StubGenerator::generate_base64_encodeBlock()
2193 {
2194 StubId stub_id = StubId::stubgen_base64_encodeBlock_id;
2195 int entry_count = StubInfo::entry_count(stub_id);
2196 assert(entry_count == 1, "sanity check");
2197 address start = load_archive_data(stub_id);
2198 if (start != nullptr) {
2199 return start;
2200 }
2201 __ align(CodeEntryAlignment);
2202 StubCodeMark mark(this, stub_id);
2203 start = __ pc();
2204
2205 __ enter();
2206
2207 // Save callee-saved registers before using them
2208 __ push_ppx(r12);
2209 __ push_ppx(r13);
2210 __ push_ppx(r14);
2211 __ push_ppx(r15);
2212
2213 // arguments
2214 const Register source = c_rarg0; // Source Array
2215 const Register start_offset = c_rarg1; // start offset
2216 const Register end_offset = c_rarg2; // end offset
2217 const Register dest = c_rarg3; // destination array
2218
2219 #ifndef _WIN64
2220 const Register dp = c_rarg4; // Position for writing to dest array
2221 const Register isURL = c_rarg5; // Base64 or URL character set
2222 #else
2223 const Address dp_mem(rbp, 6 * wordSize); // length is on stack on Win64
2224 const Address isURL_mem(rbp, 7 * wordSize);
2225 const Register isURL = r10; // pick the volatile windows register
2226 const Register dp = r12;
2227 __ movl(dp, dp_mem);
2228 __ movl(isURL, isURL_mem);
2229 #endif
2230
2231 const Register length = r14;
2232 const Register encode_table = r13;
2233 Label L_process3, L_exit, L_processdata, L_vbmiLoop, L_not512, L_32byteLoop;
2234
2235 // calculate length from offsets
2236 __ movl(length, end_offset);
2237 __ subl(length, start_offset);
2238 __ jcc(Assembler::lessEqual, L_exit);
2239
2240 // Code for 512-bit VBMI encoding. Encodes 48 input bytes into 64
2241 // output bytes. We read 64 input bytes and ignore the last 16, so be
2242 // sure not to read past the end of the input buffer.
2243 if (VM_Version::supports_avx512_vbmi()) {
2244 __ cmpl(length, 64); // Do not overrun input buffer.
2245 __ jcc(Assembler::below, L_not512);
2246
2247 __ shll(isURL, 6); // index into decode table based on isURL
2248 __ lea(encode_table, ExternalAddress(StubRoutines::x86::base64_encoding_table_addr()));
2249 __ addptr(encode_table, isURL);
2250 __ shrl(isURL, 6); // restore isURL
2251
2252 __ mov64(rax, 0x3036242a1016040aull); // Shifts
2253 __ evmovdquq(xmm3, ExternalAddress(StubRoutines::x86::base64_shuffle_addr()), Assembler::AVX_512bit, r15);
2254 __ evmovdquq(xmm2, Address(encode_table, 0), Assembler::AVX_512bit);
2255 __ evpbroadcastq(xmm1, rax, Assembler::AVX_512bit);
2256
2257 __ align32();
2258 __ BIND(L_vbmiLoop);
2259
2260 __ vpermb(xmm0, xmm3, Address(source, start_offset), Assembler::AVX_512bit);
2261 __ subl(length, 48);
2262
2263 // Put the input bytes into the proper lanes for writing, then
2264 // encode them.
2265 __ evpmultishiftqb(xmm0, xmm1, xmm0, Assembler::AVX_512bit);
2266 __ vpermb(xmm0, xmm0, xmm2, Assembler::AVX_512bit);
2267
2268 // Write to destination
2269 __ evmovdquq(Address(dest, dp), xmm0, Assembler::AVX_512bit);
2270
2271 __ addptr(dest, 64);
2272 __ addptr(source, 48);
2273 __ cmpl(length, 64);
2274 __ jcc(Assembler::aboveEqual, L_vbmiLoop);
2275
2276 __ vzeroupper();
2277 }
2278
2279 __ BIND(L_not512);
2280 if (VM_Version::supports_avx2()) {
2281 /*
2282 ** This AVX2 encoder is based off the paper at:
2283 ** https://dl.acm.org/doi/10.1145/3132709
2284 **
2285 ** We use AVX2 SIMD instructions to encode 24 bytes into 32
2286 ** output bytes.
2287 **
2288 */
2289 // Lengths under 32 bytes are done with scalar routine
2290 __ cmpl(length, 31);
2291 __ jcc(Assembler::belowEqual, L_process3);
2292
2293 // Set up supporting constant table data
2294 __ vmovdqu(xmm9, ExternalAddress(StubRoutines::x86::base64_avx2_shuffle_addr()), rax);
2295 // 6-bit mask for 2nd and 4th (and multiples) 6-bit values
2296 __ movl(rax, 0x0fc0fc00);
2297 __ movdl(xmm8, rax);
2298 __ vmovdqu(xmm1, ExternalAddress(StubRoutines::x86::base64_avx2_input_mask_addr()), rax);
2299 __ vpbroadcastd(xmm8, xmm8, Assembler::AVX_256bit);
2300
2301 // Multiplication constant for "shifting" right by 6 and 10
2302 // bits
2303 __ movl(rax, 0x04000040);
2304
2305 __ subl(length, 24);
2306 __ movdl(xmm7, rax);
2307 __ vpbroadcastd(xmm7, xmm7, Assembler::AVX_256bit);
2308
2309 // For the first load, we mask off reading of the first 4
2310 // bytes into the register. This is so we can get 4 3-byte
2311 // chunks into each lane of the register, avoiding having to
2312 // handle end conditions. We then shuffle these bytes into a
2313 // specific order so that manipulation is easier.
2314 //
2315 // The initial read loads the XMM register like this:
2316 //
2317 // Lower 128-bit lane:
2318 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
2319 // | XX | XX | XX | XX | A0 | A1 | A2 | B0 | B1 | B2 | C0 | C1
2320 // | C2 | D0 | D1 | D2 |
2321 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
2322 //
2323 // Upper 128-bit lane:
2324 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
2325 // | E0 | E1 | E2 | F0 | F1 | F2 | G0 | G1 | G2 | H0 | H1 | H2
2326 // | XX | XX | XX | XX |
2327 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
2328 //
2329 // Where A0 is the first input byte, B0 is the fourth, etc.
2330 // The alphabetical significance denotes the 3 bytes to be
2331 // consumed and encoded into 4 bytes.
2332 //
2333 // We then shuffle the register so each 32-bit word contains
2334 // the sequence:
2335 // A1 A0 A2 A1, B1, B0, B2, B1, etc.
2336 // Each of these byte sequences are then manipulated into 4
2337 // 6-bit values ready for encoding.
2338 //
2339 // If we focus on one set of 3-byte chunks, changing the
2340 // nomenclature such that A0 => a, A1 => b, and A2 => c, we
2341 // shuffle such that each 24-bit chunk contains:
2342 //
2343 // b7 b6 b5 b4 b3 b2 b1 b0 | a7 a6 a5 a4 a3 a2 a1 a0 | c7 c6
2344 // c5 c4 c3 c2 c1 c0 | b7 b6 b5 b4 b3 b2 b1 b0
2345 // Explain this step.
2346 // b3 b2 b1 b0 c5 c4 c3 c2 | c1 c0 d5 d4 d3 d2 d1 d0 | a5 a4
2347 // a3 a2 a1 a0 b5 b4 | b3 b2 b1 b0 c5 c4 c3 c2
2348 //
2349 // W first and off all but bits 4-9 and 16-21 (c5..c0 and
2350 // a5..a0) and shift them using a vector multiplication
2351 // operation (vpmulhuw) which effectively shifts c right by 6
2352 // bits and a right by 10 bits. We similarly mask bits 10-15
2353 // (d5..d0) and 22-27 (b5..b0) and shift them left by 8 and 4
2354 // bits respectively. This is done using vpmullw. We end up
2355 // with 4 6-bit values, thus splitting the 3 input bytes,
2356 // ready for encoding:
2357 // 0 0 d5..d0 0 0 c5..c0 0 0 b5..b0 0 0 a5..a0
2358 //
2359 // For translation, we recognize that there are 5 distinct
2360 // ranges of legal Base64 characters as below:
2361 //
2362 // +-------------+-------------+------------+
2363 // | 6-bit value | ASCII range | offset |
2364 // +-------------+-------------+------------+
2365 // | 0..25 | A..Z | 65 |
2366 // | 26..51 | a..z | 71 |
2367 // | 52..61 | 0..9 | -4 |
2368 // | 62 | + or - | -19 or -17 |
2369 // | 63 | / or _ | -16 or 32 |
2370 // +-------------+-------------+------------+
2371 //
2372 // We note that vpshufb does a parallel lookup in a
2373 // destination register using the lower 4 bits of bytes from a
2374 // source register. If we use a saturated subtraction and
2375 // subtract 51 from each 6-bit value, bytes from [0,51]
2376 // saturate to 0, and [52,63] map to a range of [1,12]. We
2377 // distinguish the [0,25] and [26,51] ranges by assigning a
2378 // value of 13 for all 6-bit values less than 26. We end up
2379 // with:
2380 //
2381 // +-------------+-------------+------------+
2382 // | 6-bit value | Reduced | offset |
2383 // +-------------+-------------+------------+
2384 // | 0..25 | 13 | 65 |
2385 // | 26..51 | 0 | 71 |
2386 // | 52..61 | 0..9 | -4 |
2387 // | 62 | 11 | -19 or -17 |
2388 // | 63 | 12 | -16 or 32 |
2389 // +-------------+-------------+------------+
2390 //
2391 // We then use a final vpshufb to add the appropriate offset,
2392 // translating the bytes.
2393 //
2394 // Load input bytes - only 28 bytes. Mask the first load to
2395 // not load into the full register.
2396 __ vpmaskmovd(xmm1, xmm1, Address(source, start_offset, Address::times_1, -4), Assembler::AVX_256bit);
2397
2398 // Move 3-byte chunks of input (12 bytes) into 16 bytes,
2399 // ordering by:
2400 // 1, 0, 2, 1; 4, 3, 5, 4; etc. This groups 6-bit chunks
2401 // for easy masking
2402 __ vpshufb(xmm1, xmm1, xmm9, Assembler::AVX_256bit);
2403
2404 __ addl(start_offset, 24);
2405
2406 // Load masking register for first and third (and multiples)
2407 // 6-bit values.
2408 __ movl(rax, 0x003f03f0);
2409 __ movdl(xmm6, rax);
2410 __ vpbroadcastd(xmm6, xmm6, Assembler::AVX_256bit);
2411 // Multiplication constant for "shifting" left by 4 and 8 bits
2412 __ movl(rax, 0x01000010);
2413 __ movdl(xmm5, rax);
2414 __ vpbroadcastd(xmm5, xmm5, Assembler::AVX_256bit);
2415
2416 // Isolate 6-bit chunks of interest
2417 __ vpand(xmm0, xmm8, xmm1, Assembler::AVX_256bit);
2418
2419 // Load constants for encoding
2420 __ movl(rax, 0x19191919);
2421 __ movdl(xmm3, rax);
2422 __ vpbroadcastd(xmm3, xmm3, Assembler::AVX_256bit);
2423 __ movl(rax, 0x33333333);
2424 __ movdl(xmm4, rax);
2425 __ vpbroadcastd(xmm4, xmm4, Assembler::AVX_256bit);
2426
2427 // Shift output bytes 0 and 2 into proper lanes
2428 __ vpmulhuw(xmm2, xmm0, xmm7, Assembler::AVX_256bit);
2429
2430 // Mask and shift output bytes 1 and 3 into proper lanes and
2431 // combine
2432 __ vpand(xmm0, xmm6, xmm1, Assembler::AVX_256bit);
2433 __ vpmullw(xmm0, xmm5, xmm0, Assembler::AVX_256bit);
2434 __ vpor(xmm0, xmm0, xmm2, Assembler::AVX_256bit);
2435
2436 // Find out which are 0..25. This indicates which input
2437 // values fall in the range of 'A'-'Z', which require an
2438 // additional offset (see comments above)
2439 __ vpcmpgtb(xmm2, xmm0, xmm3, Assembler::AVX_256bit);
2440 __ vpsubusb(xmm1, xmm0, xmm4, Assembler::AVX_256bit);
2441 __ vpsubb(xmm1, xmm1, xmm2, Assembler::AVX_256bit);
2442
2443 // Load the proper lookup table
2444 __ lea(r11, ExternalAddress(StubRoutines::x86::base64_avx2_lut_addr()));
2445 __ movl(r15, isURL);
2446 __ shll(r15, 5);
2447 __ vmovdqu(xmm2, Address(r11, r15));
2448
2449 // Shuffle the offsets based on the range calculation done
2450 // above. This allows us to add the correct offset to the
2451 // 6-bit value corresponding to the range documented above.
2452 __ vpshufb(xmm1, xmm2, xmm1, Assembler::AVX_256bit);
2453 __ vpaddb(xmm0, xmm1, xmm0, Assembler::AVX_256bit);
2454
2455 // Store the encoded bytes
2456 __ vmovdqu(Address(dest, dp), xmm0);
2457 __ addl(dp, 32);
2458
2459 __ cmpl(length, 31);
2460 __ jcc(Assembler::belowEqual, L_process3);
2461
2462 __ align32();
2463 __ BIND(L_32byteLoop);
2464
2465 // Get next 32 bytes
2466 __ vmovdqu(xmm1, Address(source, start_offset, Address::times_1, -4));
2467
2468 __ subl(length, 24);
2469 __ addl(start_offset, 24);
2470
2471 // This logic is identical to the above, with only constant
2472 // register loads removed. Shuffle the input, mask off 6-bit
2473 // chunks, shift them into place, then add the offset to
2474 // encode.
2475 __ vpshufb(xmm1, xmm1, xmm9, Assembler::AVX_256bit);
2476
2477 __ vpand(xmm0, xmm8, xmm1, Assembler::AVX_256bit);
2478 __ vpmulhuw(xmm10, xmm0, xmm7, Assembler::AVX_256bit);
2479 __ vpand(xmm0, xmm6, xmm1, Assembler::AVX_256bit);
2480 __ vpmullw(xmm0, xmm5, xmm0, Assembler::AVX_256bit);
2481 __ vpor(xmm0, xmm0, xmm10, Assembler::AVX_256bit);
2482 __ vpcmpgtb(xmm10, xmm0, xmm3, Assembler::AVX_256bit);
2483 __ vpsubusb(xmm1, xmm0, xmm4, Assembler::AVX_256bit);
2484 __ vpsubb(xmm1, xmm1, xmm10, Assembler::AVX_256bit);
2485 __ vpshufb(xmm1, xmm2, xmm1, Assembler::AVX_256bit);
2486 __ vpaddb(xmm0, xmm1, xmm0, Assembler::AVX_256bit);
2487
2488 // Store the encoded bytes
2489 __ vmovdqu(Address(dest, dp), xmm0);
2490 __ addl(dp, 32);
2491
2492 __ cmpl(length, 31);
2493 __ jcc(Assembler::above, L_32byteLoop);
2494
2495 __ BIND(L_process3);
2496 __ vzeroupper();
2497 } else {
2498 __ BIND(L_process3);
2499 }
2500
2501 __ cmpl(length, 3);
2502 __ jcc(Assembler::below, L_exit);
2503
2504 // Load the encoding table based on isURL
2505 __ lea(r11, ExternalAddress(StubRoutines::x86::base64_encoding_table_addr()));
2506 __ movl(r15, isURL);
2507 __ shll(r15, 6);
2508 __ addptr(r11, r15);
2509
2510 __ BIND(L_processdata);
2511
2512 // Load 3 bytes
2513 __ load_unsigned_byte(r15, Address(source, start_offset));
2514 __ load_unsigned_byte(r10, Address(source, start_offset, Address::times_1, 1));
2515 __ load_unsigned_byte(r13, Address(source, start_offset, Address::times_1, 2));
2516
2517 // Build a 32-bit word with bytes 1, 2, 0, 1
2518 __ movl(rax, r10);
2519 __ shll(r10, 24);
2520 __ orl(rax, r10);
2521
2522 __ subl(length, 3);
2523
2524 __ shll(r15, 8);
2525 __ shll(r13, 16);
2526 __ orl(rax, r15);
2527
2528 __ addl(start_offset, 3);
2529
2530 __ orl(rax, r13);
2531 // At this point, rax contains | byte1 | byte2 | byte0 | byte1
2532 // r13 has byte2 << 16 - need low-order 6 bits to translate.
2533 // This translated byte is the fourth output byte.
2534 __ shrl(r13, 16);
2535 __ andl(r13, 0x3f);
2536
2537 // The high-order 6 bits of r15 (byte0) is translated.
2538 // The translated byte is the first output byte.
2539 __ shrl(r15, 10);
2540
2541 __ load_unsigned_byte(r13, Address(r11, r13));
2542 __ load_unsigned_byte(r15, Address(r11, r15));
2543
2544 __ movb(Address(dest, dp, Address::times_1, 3), r13);
2545
2546 // Extract high-order 4 bits of byte1 and low-order 2 bits of byte0.
2547 // This translated byte is the second output byte.
2548 __ shrl(rax, 4);
2549 __ movl(r10, rax);
2550 __ andl(rax, 0x3f);
2551
2552 __ movb(Address(dest, dp, Address::times_1, 0), r15);
2553
2554 __ load_unsigned_byte(rax, Address(r11, rax));
2555
2556 // Extract low-order 2 bits of byte1 and high-order 4 bits of byte2.
2557 // This translated byte is the third output byte.
2558 __ shrl(r10, 18);
2559 __ andl(r10, 0x3f);
2560
2561 __ load_unsigned_byte(r10, Address(r11, r10));
2562
2563 __ movb(Address(dest, dp, Address::times_1, 1), rax);
2564 __ movb(Address(dest, dp, Address::times_1, 2), r10);
2565
2566 __ addl(dp, 4);
2567 __ cmpl(length, 3);
2568 __ jcc(Assembler::aboveEqual, L_processdata);
2569
2570 __ BIND(L_exit);
2571 __ pop_ppx(r15);
2572 __ pop_ppx(r14);
2573 __ pop_ppx(r13);
2574 __ pop_ppx(r12);
2575 __ leave();
2576 __ ret(0);
2577
2578 // record the stub entry and end
2579 store_archive_data(stub_id, start, __ pc());
2580
2581 return start;
2582 }
2583
2584 // base64 AVX512vbmi tables
2585 address StubGenerator::base64_vbmi_lookup_lo_addr() {
2586 StubId stub_id = StubId::stubgen_lookup_lo_base64_id;
2587 int entry_count = StubInfo::entry_count(stub_id);
2588 assert(entry_count == 1, "sanity check");
2589 address start = load_archive_data(stub_id);
2590 if (start != nullptr) {
2591 return start;
2592 }
2593 __ align64();
2594 StubCodeMark mark(this, stub_id);
2595 start = __ pc();
2596
2597 assert(((unsigned long long)start & 0x3f) == 0,
2598 "Alignment problem (0x%08llx)", (unsigned long long)start);
2599 __ emit_data64(0x8080808080808080, relocInfo::none);
2600 __ emit_data64(0x8080808080808080, relocInfo::none);
2601 __ emit_data64(0x8080808080808080, relocInfo::none);
2602 __ emit_data64(0x8080808080808080, relocInfo::none);
2603 __ emit_data64(0x8080808080808080, relocInfo::none);
2604 __ emit_data64(0x3f8080803e808080, relocInfo::none);
2605 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2606 __ emit_data64(0x8080808080803d3c, relocInfo::none);
2607
2608 // record the stub entry and end
2609 store_archive_data(stub_id, start, __ pc());
2610
2611 return start;
2612 }
2613
2614 address StubGenerator::base64_vbmi_lookup_hi_addr() {
2615 StubId stub_id = StubId::stubgen_lookup_hi_base64_id;
2616 int entry_count = StubInfo::entry_count(stub_id);
2617 assert(entry_count == 1, "sanity check");
2618 address start = load_archive_data(stub_id);
2619 if (start != nullptr) {
2620 return start;
2621 }
2622 __ align64();
2623 StubCodeMark mark(this, stub_id);
2624 start = __ pc();
2625
2626 assert(((unsigned long long)start & 0x3f) == 0,
2627 "Alignment problem (0x%08llx)", (unsigned long long)start);
2628 __ emit_data64(0x0605040302010080, relocInfo::none);
2629 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2630 __ emit_data64(0x161514131211100f, relocInfo::none);
2631 __ emit_data64(0x8080808080191817, relocInfo::none);
2632 __ emit_data64(0x201f1e1d1c1b1a80, relocInfo::none);
2633 __ emit_data64(0x2827262524232221, relocInfo::none);
2634 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2635 __ emit_data64(0x8080808080333231, relocInfo::none);
2636
2637 // record the stub entry and end
2638 store_archive_data(stub_id, start, __ pc());
2639
2640 return start;
2641 }
2642 address StubGenerator::base64_vbmi_lookup_lo_url_addr() {
2643 StubId stub_id = StubId::stubgen_lookup_lo_base64url_id;
2644 int entry_count = StubInfo::entry_count(stub_id);
2645 assert(entry_count == 1, "sanity check");
2646 address start = load_archive_data(stub_id);
2647 if (start != nullptr) {
2648 return start;
2649 }
2650 __ align64();
2651 StubCodeMark mark(this, stub_id);
2652 start = __ pc();
2653
2654 assert(((unsigned long long)start & 0x3f) == 0,
2655 "Alignment problem (0x%08llx)", (unsigned long long)start);
2656 __ emit_data64(0x8080808080808080, relocInfo::none);
2657 __ emit_data64(0x8080808080808080, relocInfo::none);
2658 __ emit_data64(0x8080808080808080, relocInfo::none);
2659 __ emit_data64(0x8080808080808080, relocInfo::none);
2660 __ emit_data64(0x8080808080808080, relocInfo::none);
2661 __ emit_data64(0x80803e8080808080, relocInfo::none);
2662 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2663 __ emit_data64(0x8080808080803d3c, relocInfo::none);
2664
2665 // record the stub entry and end
2666 store_archive_data(stub_id, start, __ pc());
2667
2668 return start;
2669 }
2670
2671 address StubGenerator::base64_vbmi_lookup_hi_url_addr() {
2672 StubId stub_id = StubId::stubgen_lookup_hi_base64url_id;
2673 int entry_count = StubInfo::entry_count(stub_id);
2674 assert(entry_count == 1, "sanity check");
2675 address start = load_archive_data(stub_id);
2676 if (start != nullptr) {
2677 return start;
2678 }
2679 __ align64();
2680 StubCodeMark mark(this, stub_id);
2681 start = __ pc();
2682
2683 assert(((unsigned long long)start & 0x3f) == 0,
2684 "Alignment problem (0x%08llx)", (unsigned long long)start);
2685 __ emit_data64(0x0605040302010080, relocInfo::none);
2686 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2687 __ emit_data64(0x161514131211100f, relocInfo::none);
2688 __ emit_data64(0x3f80808080191817, relocInfo::none);
2689 __ emit_data64(0x201f1e1d1c1b1a80, relocInfo::none);
2690 __ emit_data64(0x2827262524232221, relocInfo::none);
2691 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2692 __ emit_data64(0x8080808080333231, relocInfo::none);
2693
2694 // record the stub entry and end
2695 store_archive_data(stub_id, start, __ pc());
2696
2697 return start;
2698 }
2699
2700 address StubGenerator::base64_vbmi_pack_vec_addr() {
2701 StubId stub_id = StubId::stubgen_pack_vec_base64_id;
2702 int entry_count = StubInfo::entry_count(stub_id);
2703 assert(entry_count == 1, "sanity check");
2704 address start = load_archive_data(stub_id);
2705 if (start != nullptr) {
2706 return start;
2707 }
2708 __ align64();
2709 StubCodeMark mark(this, stub_id);
2710 start = __ pc();
2711
2712 assert(((unsigned long long)start & 0x3f) == 0,
2713 "Alignment problem (0x%08llx)", (unsigned long long)start);
2714 __ emit_data64(0x090a040506000102, relocInfo::none);
2715 __ emit_data64(0x161011120c0d0e08, relocInfo::none);
2716 __ emit_data64(0x1c1d1e18191a1415, relocInfo::none);
2717 __ emit_data64(0x292a242526202122, relocInfo::none);
2718 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2719 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2720 __ emit_data64(0x0000000000000000, relocInfo::none);
2721 __ emit_data64(0x0000000000000000, relocInfo::none);
2722
2723 // record the stub entry and end
2724 store_archive_data(stub_id, start, __ pc());
2725
2726 return start;
2727 }
2728
2729 address StubGenerator::base64_vbmi_join_0_1_addr() {
2730 StubId stub_id = StubId::stubgen_join_0_1_base64_id;
2731 int entry_count = StubInfo::entry_count(stub_id);
2732 assert(entry_count == 1, "sanity check");
2733 address start = load_archive_data(stub_id);
2734 if (start != nullptr) {
2735 return start;
2736 }
2737 __ align64();
2738 StubCodeMark mark(this, stub_id);
2739 start = __ pc();
2740
2741 assert(((unsigned long long)start & 0x3f) == 0,
2742 "Alignment problem (0x%08llx)", (unsigned long long)start);
2743 __ emit_data64(0x090a040506000102, relocInfo::none);
2744 __ emit_data64(0x161011120c0d0e08, relocInfo::none);
2745 __ emit_data64(0x1c1d1e18191a1415, relocInfo::none);
2746 __ emit_data64(0x292a242526202122, relocInfo::none);
2747 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2748 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2749 __ emit_data64(0x494a444546404142, relocInfo::none);
2750 __ emit_data64(0x565051524c4d4e48, relocInfo::none);
2751
2752 // record the stub entry and end
2753 store_archive_data(stub_id, start, __ pc());
2754
2755 return start;
2756 }
2757
2758 address StubGenerator::base64_vbmi_join_1_2_addr() {
2759 StubId stub_id = StubId::stubgen_join_1_2_base64_id;
2760 int entry_count = StubInfo::entry_count(stub_id);
2761 assert(entry_count == 1, "sanity check");
2762 address start = load_archive_data(stub_id);
2763 if (start != nullptr) {
2764 return start;
2765 }
2766 __ align64();
2767 StubCodeMark mark(this, stub_id);
2768 start = __ pc();
2769
2770 assert(((unsigned long long)start & 0x3f) == 0,
2771 "Alignment problem (0x%08llx)", (unsigned long long)start);
2772 __ emit_data64(0x1c1d1e18191a1415, relocInfo::none);
2773 __ emit_data64(0x292a242526202122, relocInfo::none);
2774 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2775 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2776 __ emit_data64(0x494a444546404142, relocInfo::none);
2777 __ emit_data64(0x565051524c4d4e48, relocInfo::none);
2778 __ emit_data64(0x5c5d5e58595a5455, relocInfo::none);
2779 __ emit_data64(0x696a646566606162, relocInfo::none);
2780
2781 // record the stub entry and end
2782 store_archive_data(stub_id, start, __ pc());
2783
2784 return start;
2785 }
2786
2787 address StubGenerator::base64_vbmi_join_2_3_addr() {
2788 StubId stub_id = StubId::stubgen_join_2_3_base64_id;
2789 int entry_count = StubInfo::entry_count(stub_id);
2790 assert(entry_count == 1, "sanity check");
2791 address start = load_archive_data(stub_id);
2792 if (start != nullptr) {
2793 return start;
2794 }
2795 __ align64();
2796 StubCodeMark mark(this, stub_id);
2797 start = __ pc();
2798
2799 assert(((unsigned long long)start & 0x3f) == 0,
2800 "Alignment problem (0x%08llx)", (unsigned long long)start);
2801 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2802 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2803 __ emit_data64(0x494a444546404142, relocInfo::none);
2804 __ emit_data64(0x565051524c4d4e48, relocInfo::none);
2805 __ emit_data64(0x5c5d5e58595a5455, relocInfo::none);
2806 __ emit_data64(0x696a646566606162, relocInfo::none);
2807 __ emit_data64(0x767071726c6d6e68, relocInfo::none);
2808 __ emit_data64(0x7c7d7e78797a7475, relocInfo::none);
2809
2810 // record the stub entry and end
2811 store_archive_data(stub_id, start, __ pc());
2812
2813 return start;
2814 }
2815
2816 address StubGenerator::base64_AVX2_decode_tables_addr() {
2817 StubId stub_id = StubId::stubgen_avx2_decode_tables_base64_id;
2818 int entry_count = StubInfo::entry_count(stub_id);
2819 assert(entry_count == 1, "sanity check");
2820 address start = load_archive_data(stub_id);
2821 if (start != nullptr) {
2822 return start;
2823 }
2824 __ align64();
2825 StubCodeMark mark(this, stub_id);
2826 start = __ pc();
2827
2828 assert(((unsigned long long)start & 0x3f) == 0,
2829 "Alignment problem (0x%08llx)", (unsigned long long)start);
2830 __ emit_data(0x2f2f2f2f, relocInfo::none, 0);
2831 __ emit_data(0x5f5f5f5f, relocInfo::none, 0); // for URL
2832
2833 __ emit_data(0xffffffff, relocInfo::none, 0);
2834 __ emit_data(0xfcfcfcfc, relocInfo::none, 0); // for URL
2835
2836 // Permute table
2837 __ emit_data64(0x0000000100000000, relocInfo::none);
2838 __ emit_data64(0x0000000400000002, relocInfo::none);
2839 __ emit_data64(0x0000000600000005, relocInfo::none);
2840 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2841
2842 // Shuffle table
2843 __ emit_data64(0x090a040506000102, relocInfo::none);
2844 __ emit_data64(0xffffffff0c0d0e08, relocInfo::none);
2845 __ emit_data64(0x090a040506000102, relocInfo::none);
2846 __ emit_data64(0xffffffff0c0d0e08, relocInfo::none);
2847
2848 // merge table
2849 __ emit_data(0x01400140, relocInfo::none, 0);
2850
2851 // merge multiplier
2852 __ emit_data(0x00011000, relocInfo::none, 0);
2853
2854 // record the stub entry and end
2855 store_archive_data(stub_id, start, __ pc());
2856
2857 return start;
2858 }
2859
2860 address StubGenerator::base64_AVX2_decode_LUT_tables_addr() {
2861 StubId stub_id = StubId::stubgen_avx2_decode_lut_tables_base64_id;
2862 int entry_count = StubInfo::entry_count(stub_id);
2863 assert(entry_count == 1, "sanity check");
2864 address start = load_archive_data(stub_id);
2865 if (start != nullptr) {
2866 return start;
2867 }
2868 __ align64();
2869 StubCodeMark mark(this, stub_id);
2870 start = __ pc();
2871
2872 assert(((unsigned long long)start & 0x3f) == 0,
2873 "Alignment problem (0x%08llx)", (unsigned long long)start);
2874 // lut_lo
2875 __ emit_data64(0x1111111111111115, relocInfo::none);
2876 __ emit_data64(0x1a1b1b1b1a131111, relocInfo::none);
2877 __ emit_data64(0x1111111111111115, relocInfo::none);
2878 __ emit_data64(0x1a1b1b1b1a131111, relocInfo::none);
2879
2880 // lut_roll
2881 __ emit_data64(0xb9b9bfbf04131000, relocInfo::none);
2882 __ emit_data64(0x0000000000000000, relocInfo::none);
2883 __ emit_data64(0xb9b9bfbf04131000, relocInfo::none);
2884 __ emit_data64(0x0000000000000000, relocInfo::none);
2885
2886 // lut_lo URL
2887 __ emit_data64(0x1111111111111115, relocInfo::none);
2888 __ emit_data64(0x1b1b1a1b1b131111, relocInfo::none);
2889 __ emit_data64(0x1111111111111115, relocInfo::none);
2890 __ emit_data64(0x1b1b1a1b1b131111, relocInfo::none);
2891
2892 // lut_roll URL
2893 __ emit_data64(0xb9b9bfbf0411e000, relocInfo::none);
2894 __ emit_data64(0x0000000000000000, relocInfo::none);
2895 __ emit_data64(0xb9b9bfbf0411e000, relocInfo::none);
2896 __ emit_data64(0x0000000000000000, relocInfo::none);
2897
2898 // lut_hi
2899 __ emit_data64(0x0804080402011010, relocInfo::none);
2900 __ emit_data64(0x1010101010101010, relocInfo::none);
2901 __ emit_data64(0x0804080402011010, relocInfo::none);
2902 __ emit_data64(0x1010101010101010, relocInfo::none);
2903
2904 // record the stub entry and end
2905 store_archive_data(stub_id, start, __ pc());
2906
2907 return start;
2908 }
2909
2910 address StubGenerator::base64_decoding_table_addr() {
2911 StubId stub_id = StubId::stubgen_decoding_table_base64_id;
2912 int entry_count = StubInfo::entry_count(stub_id);
2913 assert(entry_count == 1, "sanity check");
2914 address start = load_archive_data(stub_id);
2915 if (start != nullptr) {
2916 return start;
2917 }
2918 StubCodeMark mark(this, stub_id);
2919 start = __ pc();
2920
2921 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2922 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2923 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2924 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2925 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2926 __ emit_data64(0x3fffffff3effffff, relocInfo::none);
2927 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2928 __ emit_data64(0xffffffffffff3d3c, relocInfo::none);
2929 __ emit_data64(0x06050403020100ff, relocInfo::none);
2930 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2931 __ emit_data64(0x161514131211100f, relocInfo::none);
2932 __ emit_data64(0xffffffffff191817, relocInfo::none);
2933 __ emit_data64(0x201f1e1d1c1b1aff, relocInfo::none);
2934 __ emit_data64(0x2827262524232221, relocInfo::none);
2935 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2936 __ emit_data64(0xffffffffff333231, relocInfo::none);
2937 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2938 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2939 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2940 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2941 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2942 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2943 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2944 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2945 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2946 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2947 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2948 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2949 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2950 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2951 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2952 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2953
2954 // URL table
2955 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2956 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2957 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2958 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2959 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2960 __ emit_data64(0xffff3effffffffff, relocInfo::none);
2961 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2962 __ emit_data64(0xffffffffffff3d3c, relocInfo::none);
2963 __ emit_data64(0x06050403020100ff, relocInfo::none);
2964 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2965 __ emit_data64(0x161514131211100f, relocInfo::none);
2966 __ emit_data64(0x3fffffffff191817, relocInfo::none);
2967 __ emit_data64(0x201f1e1d1c1b1aff, relocInfo::none);
2968 __ emit_data64(0x2827262524232221, relocInfo::none);
2969 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2970 __ emit_data64(0xffffffffff333231, relocInfo::none);
2971 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2972 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2973 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2974 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2975 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2976 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2977 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2978 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2979 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2980 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2981 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2982 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2983 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2984 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2985 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2986 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2987
2988 // record the stub entry and end
2989 store_archive_data(stub_id, start, __ pc());
2990
2991 return start;
2992 }
2993
2994
2995 // Code for generating Base64 decoding.
2996 //
2997 // Based on the article (and associated code) from https://arxiv.org/abs/1910.05109.
2998 //
2999 // Intrinsic function prototype in Base64.java:
3000 // private void decodeBlock(byte[] src, int sp, int sl, byte[] dst, int dp, boolean isURL, isMIME) {
3001 address StubGenerator::generate_base64_decodeBlock() {
3002 StubId stub_id = StubId::stubgen_base64_decodeBlock_id;
3003 int entry_count = StubInfo::entry_count(stub_id);
3004 assert(entry_count == 1, "sanity check");
3005 address start = load_archive_data(stub_id);
3006 if (start != nullptr) {
3007 return start;
3008 }
3009 __ align(CodeEntryAlignment);
3010 StubCodeMark mark(this, stub_id);
3011 start = __ pc();
3012
3013 __ enter();
3014
3015 // Save callee-saved registers before using them
3016 __ push_ppx(r12);
3017 __ push_ppx(r13);
3018 __ push_ppx(r14);
3019 __ push_ppx(r15);
3020 __ push_ppx(rbx);
3021
3022 // arguments
3023 const Register source = c_rarg0; // Source Array
3024 const Register start_offset = c_rarg1; // start offset
3025 const Register end_offset = c_rarg2; // end offset
3026 const Register dest = c_rarg3; // destination array
3027 const Register isMIME = rbx;
3028
3029 #ifndef _WIN64
3030 const Register dp = c_rarg4; // Position for writing to dest array
3031 const Register isURL = c_rarg5;// Base64 or URL character set
3032 __ movl(isMIME, Address(rbp, 2 * wordSize));
3033 #else
3034 const Address dp_mem(rbp, 6 * wordSize); // length is on stack on Win64
3035 const Address isURL_mem(rbp, 7 * wordSize);
3036 const Register isURL = r10; // pick the volatile windows register
3037 const Register dp = r12;
3038 __ movl(dp, dp_mem);
3039 __ movl(isURL, isURL_mem);
3040 __ movl(isMIME, Address(rbp, 8 * wordSize));
3041 #endif
3042
3043 const XMMRegister lookup_lo = xmm5;
3044 const XMMRegister lookup_hi = xmm6;
3045 const XMMRegister errorvec = xmm7;
3046 const XMMRegister pack16_op = xmm9;
3047 const XMMRegister pack32_op = xmm8;
3048 const XMMRegister input0 = xmm3;
3049 const XMMRegister input1 = xmm20;
3050 const XMMRegister input2 = xmm21;
3051 const XMMRegister input3 = xmm19;
3052 const XMMRegister join01 = xmm12;
3053 const XMMRegister join12 = xmm11;
3054 const XMMRegister join23 = xmm10;
3055 const XMMRegister translated0 = xmm2;
3056 const XMMRegister translated1 = xmm1;
3057 const XMMRegister translated2 = xmm0;
3058 const XMMRegister translated3 = xmm4;
3059
3060 const XMMRegister merged0 = xmm2;
3061 const XMMRegister merged1 = xmm1;
3062 const XMMRegister merged2 = xmm0;
3063 const XMMRegister merged3 = xmm4;
3064 const XMMRegister merge_ab_bc0 = xmm2;
3065 const XMMRegister merge_ab_bc1 = xmm1;
3066 const XMMRegister merge_ab_bc2 = xmm0;
3067 const XMMRegister merge_ab_bc3 = xmm4;
3068
3069 const XMMRegister pack24bits = xmm4;
3070
3071 const Register length = r14;
3072 const Register output_size = r13;
3073 const Register output_mask = r15;
3074 const KRegister input_mask = k1;
3075
3076 const XMMRegister input_initial_valid_b64 = xmm0;
3077 const XMMRegister tmp = xmm10;
3078 const XMMRegister mask = xmm0;
3079 const XMMRegister invalid_b64 = xmm1;
3080
3081 Label L_process256, L_process64, L_process64Loop, L_exit, L_processdata, L_loadURL;
3082 Label L_continue, L_finalBit, L_padding, L_donePadding, L_bruteForce;
3083 Label L_forceLoop, L_bottomLoop, L_checkMIME, L_exit_no_vzero, L_lastChunk;
3084
3085 // calculate length from offsets
3086 __ movl(length, end_offset);
3087 __ subl(length, start_offset);
3088 __ push_ppx(dest); // Save for return value calc
3089
3090 // If AVX512 VBMI not supported, just compile non-AVX code
3091 if(VM_Version::supports_avx512_vbmi() &&
3092 VM_Version::supports_avx512bw()) {
3093 __ cmpl(length, 31); // 32-bytes is break-even for AVX-512
3094 __ jcc(Assembler::lessEqual, L_lastChunk);
3095
3096 __ cmpl(isMIME, 0);
3097 __ jcc(Assembler::notEqual, L_lastChunk);
3098
3099 // Load lookup tables based on isURL
3100 __ cmpl(isURL, 0);
3101 __ jcc(Assembler::notZero, L_loadURL);
3102
3103 __ evmovdquq(lookup_lo, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_lo_addr()), Assembler::AVX_512bit, r13);
3104 __ evmovdquq(lookup_hi, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_hi_addr()), Assembler::AVX_512bit, r13);
3105
3106 __ BIND(L_continue);
3107
3108 __ movl(r15, 0x01400140);
3109 __ evpbroadcastd(pack16_op, r15, Assembler::AVX_512bit);
3110
3111 __ movl(r15, 0x00011000);
3112 __ evpbroadcastd(pack32_op, r15, Assembler::AVX_512bit);
3113
3114 __ cmpl(length, 0xff);
3115 __ jcc(Assembler::lessEqual, L_process64);
3116
3117 // load masks required for decoding data
3118 __ BIND(L_processdata);
3119 __ evmovdquq(join01, ExternalAddress(StubRoutines::x86::base64_vbmi_join_0_1_addr()), Assembler::AVX_512bit,r13);
3120 __ evmovdquq(join12, ExternalAddress(StubRoutines::x86::base64_vbmi_join_1_2_addr()), Assembler::AVX_512bit, r13);
3121 __ evmovdquq(join23, ExternalAddress(StubRoutines::x86::base64_vbmi_join_2_3_addr()), Assembler::AVX_512bit, r13);
3122
3123 __ align32();
3124 __ BIND(L_process256);
3125 // Grab input data
3126 __ evmovdquq(input0, Address(source, start_offset, Address::times_1, 0x00), Assembler::AVX_512bit);
3127 __ evmovdquq(input1, Address(source, start_offset, Address::times_1, 0x40), Assembler::AVX_512bit);
3128 __ evmovdquq(input2, Address(source, start_offset, Address::times_1, 0x80), Assembler::AVX_512bit);
3129 __ evmovdquq(input3, Address(source, start_offset, Address::times_1, 0xc0), Assembler::AVX_512bit);
3130
3131 // Copy the low part of the lookup table into the destination of the permutation
3132 __ evmovdquq(translated0, lookup_lo, Assembler::AVX_512bit);
3133 __ evmovdquq(translated1, lookup_lo, Assembler::AVX_512bit);
3134 __ evmovdquq(translated2, lookup_lo, Assembler::AVX_512bit);
3135 __ evmovdquq(translated3, lookup_lo, Assembler::AVX_512bit);
3136
3137 // Translate the base64 input into "decoded" bytes
3138 __ evpermt2b(translated0, input0, lookup_hi, Assembler::AVX_512bit);
3139 __ evpermt2b(translated1, input1, lookup_hi, Assembler::AVX_512bit);
3140 __ evpermt2b(translated2, input2, lookup_hi, Assembler::AVX_512bit);
3141 __ evpermt2b(translated3, input3, lookup_hi, Assembler::AVX_512bit);
3142
3143 // OR all of the translations together to check for errors (high-order bit of byte set)
3144 __ vpternlogd(input0, 0xfe, input1, input2, Assembler::AVX_512bit);
3145
3146 __ vpternlogd(input3, 0xfe, translated0, translated1, Assembler::AVX_512bit);
3147 __ vpternlogd(input0, 0xfe, translated2, translated3, Assembler::AVX_512bit);
3148 __ vpor(errorvec, input3, input0, Assembler::AVX_512bit);
3149
3150 // Check if there was an error - if so, try 64-byte chunks
3151 __ evpmovb2m(k3, errorvec, Assembler::AVX_512bit);
3152 __ kortestql(k3, k3);
3153 __ jcc(Assembler::notZero, L_process64);
3154
3155 // The merging and shuffling happens here
3156 // We multiply each byte pair [00dddddd | 00cccccc | 00bbbbbb | 00aaaaaa]
3157 // Multiply [00cccccc] by 2^6 added to [00dddddd] to get [0000cccc | ccdddddd]
3158 // The pack16_op is a vector of 0x01400140, so multiply D by 1 and C by 0x40
3159 __ vpmaddubsw(merge_ab_bc0, translated0, pack16_op, Assembler::AVX_512bit);
3160 __ vpmaddubsw(merge_ab_bc1, translated1, pack16_op, Assembler::AVX_512bit);
3161 __ vpmaddubsw(merge_ab_bc2, translated2, pack16_op, Assembler::AVX_512bit);
3162 __ vpmaddubsw(merge_ab_bc3, translated3, pack16_op, Assembler::AVX_512bit);
3163
3164 // Now do the same with packed 16-bit values.
3165 // We start with [0000cccc | ccdddddd | 0000aaaa | aabbbbbb]
3166 // pack32_op is 0x00011000 (2^12, 1), so this multiplies [0000aaaa | aabbbbbb] by 2^12
3167 // and adds [0000cccc | ccdddddd] to yield [00000000 | aaaaaabb | bbbbcccc | ccdddddd]
3168 __ vpmaddwd(merged0, merge_ab_bc0, pack32_op, Assembler::AVX_512bit);
3169 __ vpmaddwd(merged1, merge_ab_bc1, pack32_op, Assembler::AVX_512bit);
3170 __ vpmaddwd(merged2, merge_ab_bc2, pack32_op, Assembler::AVX_512bit);
3171 __ vpmaddwd(merged3, merge_ab_bc3, pack32_op, Assembler::AVX_512bit);
3172
3173 // The join vectors specify which byte from which vector goes into the outputs
3174 // One of every 4 bytes in the extended vector is zero, so we pack them into their
3175 // final positions in the register for storing (256 bytes in, 192 bytes out)
3176 __ evpermt2b(merged0, join01, merged1, Assembler::AVX_512bit);
3177 __ evpermt2b(merged1, join12, merged2, Assembler::AVX_512bit);
3178 __ evpermt2b(merged2, join23, merged3, Assembler::AVX_512bit);
3179
3180 // Store result
3181 __ evmovdquq(Address(dest, dp, Address::times_1, 0x00), merged0, Assembler::AVX_512bit);
3182 __ evmovdquq(Address(dest, dp, Address::times_1, 0x40), merged1, Assembler::AVX_512bit);
3183 __ evmovdquq(Address(dest, dp, Address::times_1, 0x80), merged2, Assembler::AVX_512bit);
3184
3185 __ addptr(source, 0x100);
3186 __ addptr(dest, 0xc0);
3187 __ subl(length, 0x100);
3188 __ cmpl(length, 64 * 4);
3189 __ jcc(Assembler::greaterEqual, L_process256);
3190
3191 // At this point, we've decoded 64 * 4 * n bytes.
3192 // The remaining length will be <= 64 * 4 - 1.
3193 // UNLESS there was an error decoding the first 256-byte chunk. In this
3194 // case, the length will be arbitrarily long.
3195 //
3196 // Note that this will be the path for MIME-encoded strings.
3197
3198 __ BIND(L_process64);
3199
3200 __ evmovdquq(pack24bits, ExternalAddress(StubRoutines::x86::base64_vbmi_pack_vec_addr()), Assembler::AVX_512bit, r13);
3201
3202 __ cmpl(length, 63);
3203 __ jcc(Assembler::lessEqual, L_finalBit);
3204
3205 __ mov64(rax, 0x0000ffffffffffff);
3206 __ kmovql(k2, rax);
3207
3208 __ align32();
3209 __ BIND(L_process64Loop);
3210
3211 // Handle first 64-byte block
3212
3213 __ evmovdquq(input0, Address(source, start_offset), Assembler::AVX_512bit);
3214 __ evmovdquq(translated0, lookup_lo, Assembler::AVX_512bit);
3215 __ evpermt2b(translated0, input0, lookup_hi, Assembler::AVX_512bit);
3216
3217 __ vpor(errorvec, translated0, input0, Assembler::AVX_512bit);
3218
3219 // Check for error and bomb out before updating dest
3220 __ evpmovb2m(k3, errorvec, Assembler::AVX_512bit);
3221 __ kortestql(k3, k3);
3222 __ jcc(Assembler::notZero, L_exit);
3223
3224 // Pack output register, selecting correct byte ordering
3225 __ vpmaddubsw(merge_ab_bc0, translated0, pack16_op, Assembler::AVX_512bit);
3226 __ vpmaddwd(merged0, merge_ab_bc0, pack32_op, Assembler::AVX_512bit);
3227 __ vpermb(merged0, pack24bits, merged0, Assembler::AVX_512bit);
3228
3229 __ evmovdqub(Address(dest, dp), k2, merged0, true, Assembler::AVX_512bit);
3230
3231 __ subl(length, 64);
3232 __ addptr(source, 64);
3233 __ addptr(dest, 48);
3234
3235 __ cmpl(length, 64);
3236 __ jcc(Assembler::greaterEqual, L_process64Loop);
3237
3238 __ cmpl(length, 0);
3239 __ jcc(Assembler::lessEqual, L_exit);
3240
3241 __ BIND(L_finalBit);
3242 // Now have 1 to 63 bytes left to decode
3243
3244 // I was going to let Java take care of the final fragment
3245 // however it will repeatedly call this routine for every 4 bytes
3246 // of input data, so handle the rest here.
3247 __ movq(rax, -1);
3248 __ bzhiq(rax, rax, length); // Input mask in rax
3249
3250 __ movl(output_size, length);
3251 __ shrl(output_size, 2); // Find (len / 4) * 3 (output length)
3252 __ lea(output_size, Address(output_size, output_size, Address::times_2, 0));
3253 // output_size in r13
3254
3255 // Strip pad characters, if any, and adjust length and mask
3256 __ addq(length, start_offset);
3257 __ cmpb(Address(source, length, Address::times_1, -1), '=');
3258 __ jcc(Assembler::equal, L_padding);
3259
3260 __ BIND(L_donePadding);
3261 __ subq(length, start_offset);
3262
3263 // Output size is (64 - output_size), output mask is (all 1s >> output_size).
3264 __ kmovql(input_mask, rax);
3265 __ movq(output_mask, -1);
3266 __ bzhiq(output_mask, output_mask, output_size);
3267
3268 // Load initial input with all valid base64 characters. Will be used
3269 // in merging source bytes to avoid masking when determining if an error occurred.
3270 __ movl(rax, 0x61616161);
3271 __ evpbroadcastd(input_initial_valid_b64, rax, Assembler::AVX_512bit);
3272
3273 // A register containing all invalid base64 decoded values
3274 __ movl(rax, 0x80808080);
3275 __ evpbroadcastd(invalid_b64, rax, Assembler::AVX_512bit);
3276
3277 // input_mask is in k1
3278 // output_size is in r13
3279 // output_mask is in r15
3280 // zmm0 - free
3281 // zmm1 - 0x00011000
3282 // zmm2 - 0x01400140
3283 // zmm3 - errorvec
3284 // zmm4 - pack vector
3285 // zmm5 - lookup_lo
3286 // zmm6 - lookup_hi
3287 // zmm7 - errorvec
3288 // zmm8 - 0x61616161
3289 // zmm9 - 0x80808080
3290
3291 // Load only the bytes from source, merging into our "fully-valid" register
3292 __ evmovdqub(input_initial_valid_b64, input_mask, Address(source, start_offset, Address::times_1, 0x0), true, Assembler::AVX_512bit);
3293
3294 // Decode all bytes within our merged input
3295 __ evmovdquq(tmp, lookup_lo, Assembler::AVX_512bit);
3296 __ evpermt2b(tmp, input_initial_valid_b64, lookup_hi, Assembler::AVX_512bit);
3297 __ evporq(mask, tmp, input_initial_valid_b64, Assembler::AVX_512bit);
3298
3299 // Check for error. Compare (decoded | initial) to all invalid.
3300 // If any bytes have their high-order bit set, then we have an error.
3301 __ evptestmb(k2, mask, invalid_b64, Assembler::AVX_512bit);
3302 __ kortestql(k2, k2);
3303
3304 // If we have an error, use the brute force loop to decode what we can (4-byte chunks).
3305 __ jcc(Assembler::notZero, L_bruteForce);
3306
3307 // Shuffle output bytes
3308 __ vpmaddubsw(tmp, tmp, pack16_op, Assembler::AVX_512bit);
3309 __ vpmaddwd(tmp, tmp, pack32_op, Assembler::AVX_512bit);
3310
3311 __ vpermb(tmp, pack24bits, tmp, Assembler::AVX_512bit);
3312 __ kmovql(k1, output_mask);
3313 __ evmovdqub(Address(dest, dp), k1, tmp, true, Assembler::AVX_512bit);
3314
3315 __ addptr(dest, output_size);
3316
3317 __ BIND(L_exit);
3318 __ vzeroupper();
3319 __ pop_ppx(rax); // Get original dest value
3320 __ subptr(dest, rax); // Number of bytes converted
3321 __ movptr(rax, dest);
3322 __ pop_ppx(rbx);
3323 __ pop_ppx(r15);
3324 __ pop_ppx(r14);
3325 __ pop_ppx(r13);
3326 __ pop_ppx(r12);
3327 __ leave();
3328 __ ret(0);
3329
3330 __ BIND(L_loadURL);
3331 __ evmovdquq(lookup_lo, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_lo_url_addr()), Assembler::AVX_512bit, r13);
3332 __ evmovdquq(lookup_hi, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_hi_url_addr()), Assembler::AVX_512bit, r13);
3333 __ jmp(L_continue);
3334
3335 __ BIND(L_padding);
3336 __ decrementq(output_size, 1);
3337 __ shrq(rax, 1);
3338
3339 __ cmpb(Address(source, length, Address::times_1, -2), '=');
3340 __ jcc(Assembler::notEqual, L_donePadding);
3341
3342 __ decrementq(output_size, 1);
3343 __ shrq(rax, 1);
3344 __ jmp(L_donePadding);
3345
3346 __ align32();
3347 __ BIND(L_bruteForce);
3348 } // End of if(avx512_vbmi)
3349
3350 if (VM_Version::supports_avx2()) {
3351 Label L_tailProc, L_topLoop, L_enterLoop;
3352
3353 __ cmpl(isMIME, 0);
3354 __ jcc(Assembler::notEqual, L_lastChunk);
3355
3356 // Check for buffer too small (for algorithm)
3357 __ subl(length, 0x2c);
3358 __ jcc(Assembler::less, L_tailProc);
3359
3360 __ shll(isURL, 2);
3361
3362 // Algorithm adapted from https://arxiv.org/abs/1704.00605, "Faster Base64
3363 // Encoding and Decoding using AVX2 Instructions". URL modifications added.
3364
3365 // Set up constants
3366 __ lea(r13, ExternalAddress(StubRoutines::x86::base64_AVX2_decode_tables_addr()));
3367 __ vpbroadcastd(xmm4, Address(r13, isURL, Address::times_1), Assembler::AVX_256bit); // 2F or 5F
3368 __ vpbroadcastd(xmm10, Address(r13, isURL, Address::times_1, 0x08), Assembler::AVX_256bit); // -1 or -4
3369 __ vmovdqu(xmm12, Address(r13, 0x10)); // permute
3370 __ vmovdqu(xmm13, Address(r13, 0x30)); // shuffle
3371 __ vpbroadcastd(xmm7, Address(r13, 0x50), Assembler::AVX_256bit); // merge
3372 __ vpbroadcastd(xmm6, Address(r13, 0x54), Assembler::AVX_256bit); // merge mult
3373
3374 __ lea(r13, ExternalAddress(StubRoutines::x86::base64_AVX2_decode_LUT_tables_addr()));
3375 __ shll(isURL, 4);
3376 __ vmovdqu(xmm11, Address(r13, isURL, Address::times_1, 0x00)); // lut_lo
3377 __ vmovdqu(xmm8, Address(r13, isURL, Address::times_1, 0x20)); // lut_roll
3378 __ shrl(isURL, 6); // restore isURL
3379 __ vmovdqu(xmm9, Address(r13, 0x80)); // lut_hi
3380 __ jmp(L_enterLoop);
3381
3382 __ align32();
3383 __ bind(L_topLoop);
3384 // Add in the offset value (roll) to get 6-bit out values
3385 __ vpaddb(xmm0, xmm0, xmm2, Assembler::AVX_256bit);
3386 // Merge and permute the output bits into appropriate output byte lanes
3387 __ vpmaddubsw(xmm0, xmm0, xmm7, Assembler::AVX_256bit);
3388 __ vpmaddwd(xmm0, xmm0, xmm6, Assembler::AVX_256bit);
3389 __ vpshufb(xmm0, xmm0, xmm13, Assembler::AVX_256bit);
3390 __ vpermd(xmm0, xmm12, xmm0, Assembler::AVX_256bit);
3391 // Store the output bytes
3392 __ vmovdqu(Address(dest, dp, Address::times_1, 0), xmm0);
3393 __ addptr(source, 0x20);
3394 __ addptr(dest, 0x18);
3395 __ subl(length, 0x20);
3396 __ jcc(Assembler::less, L_tailProc);
3397
3398 __ bind(L_enterLoop);
3399
3400 // Load in encoded string (32 bytes)
3401 __ vmovdqu(xmm2, Address(source, start_offset, Address::times_1, 0x0));
3402 // Extract the high nibble for indexing into the lut tables. High 4 bits are don't care.
3403 __ vpsrld(xmm1, xmm2, 0x4, Assembler::AVX_256bit);
3404 __ vpand(xmm1, xmm4, xmm1, Assembler::AVX_256bit);
3405 // Extract the low nibble. 5F/2F will isolate the low-order 4 bits. High 4 bits are don't care.
3406 __ vpand(xmm3, xmm2, xmm4, Assembler::AVX_256bit);
3407 // Check for special-case (0x2F or 0x5F (URL))
3408 __ vpcmpeqb(xmm0, xmm4, xmm2, Assembler::AVX_256bit);
3409 // Get the bitset based on the low nibble. vpshufb uses low-order 4 bits only.
3410 __ vpshufb(xmm3, xmm11, xmm3, Assembler::AVX_256bit);
3411 // Get the bit value of the high nibble
3412 __ vpshufb(xmm5, xmm9, xmm1, Assembler::AVX_256bit);
3413 // Make sure 2F / 5F shows as valid
3414 __ vpandn(xmm3, xmm0, xmm3, Assembler::AVX_256bit);
3415 // Make adjustment for roll index. For non-URL, this is a no-op,
3416 // for URL, this adjusts by -4. This is to properly index the
3417 // roll value for 2F / 5F.
3418 __ vpand(xmm0, xmm0, xmm10, Assembler::AVX_256bit);
3419 // If the and of the two is non-zero, we have an invalid input character
3420 __ vptest(xmm3, xmm5);
3421 // Extract the "roll" value - value to add to the input to get 6-bit out value
3422 __ vpaddb(xmm0, xmm0, xmm1, Assembler::AVX_256bit); // Handle 2F / 5F
3423 __ vpshufb(xmm0, xmm8, xmm0, Assembler::AVX_256bit);
3424 __ jcc(Assembler::equal, L_topLoop); // Fall through on error
3425
3426 __ bind(L_tailProc);
3427
3428 __ addl(length, 0x2c);
3429
3430 __ vzeroupper();
3431 }
3432
3433 // Use non-AVX code to decode 4-byte chunks into 3 bytes of output
3434
3435 // Register state (Linux):
3436 // r12-15 - saved on stack
3437 // rdi - src
3438 // rsi - sp
3439 // rdx - sl
3440 // rcx - dst
3441 // r8 - dp
3442 // r9 - isURL
3443
3444 // Register state (Windows):
3445 // r12-15 - saved on stack
3446 // rcx - src
3447 // rdx - sp
3448 // r8 - sl
3449 // r9 - dst
3450 // r12 - dp
3451 // r10 - isURL
3452
3453 // Registers (common):
3454 // length (r14) - bytes in src
3455
3456 const Register decode_table = r11;
3457 const Register out_byte_count = rbx;
3458 const Register byte1 = r13;
3459 const Register byte2 = r15;
3460 const Register byte3 = WIN64_ONLY(r8) NOT_WIN64(rdx);
3461 const Register byte4 = WIN64_ONLY(r10) NOT_WIN64(r9);
3462
3463 __ bind(L_lastChunk);
3464
3465 __ shrl(length, 2); // Multiple of 4 bytes only - length is # 4-byte chunks
3466 __ cmpl(length, 0);
3467 __ jcc(Assembler::lessEqual, L_exit_no_vzero);
3468
3469 __ shll(isURL, 8); // index into decode table based on isURL
3470 __ lea(decode_table, ExternalAddress(StubRoutines::x86::base64_decoding_table_addr()));
3471 __ addptr(decode_table, isURL);
3472
3473 __ jmp(L_bottomLoop);
3474
3475 __ align32();
3476 __ BIND(L_forceLoop);
3477 __ shll(byte1, 18);
3478 __ shll(byte2, 12);
3479 __ shll(byte3, 6);
3480 __ orl(byte1, byte2);
3481 __ orl(byte1, byte3);
3482 __ orl(byte1, byte4);
3483
3484 __ addptr(source, 4);
3485
3486 __ movb(Address(dest, dp, Address::times_1, 2), byte1);
3487 __ shrl(byte1, 8);
3488 __ movb(Address(dest, dp, Address::times_1, 1), byte1);
3489 __ shrl(byte1, 8);
3490 __ movb(Address(dest, dp, Address::times_1, 0), byte1);
3491
3492 __ addptr(dest, 3);
3493 __ decrementl(length, 1);
3494 __ jcc(Assembler::zero, L_exit_no_vzero);
3495
3496 __ BIND(L_bottomLoop);
3497 __ load_unsigned_byte(byte1, Address(source, start_offset, Address::times_1, 0x00));
3498 __ load_unsigned_byte(byte2, Address(source, start_offset, Address::times_1, 0x01));
3499 __ load_signed_byte(byte1, Address(decode_table, byte1));
3500 __ load_signed_byte(byte2, Address(decode_table, byte2));
3501 __ load_unsigned_byte(byte3, Address(source, start_offset, Address::times_1, 0x02));
3502 __ load_unsigned_byte(byte4, Address(source, start_offset, Address::times_1, 0x03));
3503 __ load_signed_byte(byte3, Address(decode_table, byte3));
3504 __ load_signed_byte(byte4, Address(decode_table, byte4));
3505
3506 __ mov(rax, byte1);
3507 __ orl(rax, byte2);
3508 __ orl(rax, byte3);
3509 __ orl(rax, byte4);
3510 __ jcc(Assembler::positive, L_forceLoop);
3511
3512 __ BIND(L_exit_no_vzero);
3513 __ pop_ppx(rax); // Get original dest value
3514 __ subptr(dest, rax); // Number of bytes converted
3515 __ movptr(rax, dest);
3516 __ pop_ppx(rbx);
3517 __ pop_ppx(r15);
3518 __ pop_ppx(r14);
3519 __ pop_ppx(r13);
3520 __ pop_ppx(r12);
3521 __ leave();
3522 __ ret(0);
3523
3524 // record the stub entry and end
3525 store_archive_data(stub_id, start, __ pc());
3526
3527 return start;
3528 }
3529
3530
3531 /**
3532 * Arguments:
3533 *
3534 * Inputs:
3535 * c_rarg0 - int crc
3536 * c_rarg1 - byte* buf
3537 * c_rarg2 - int length
3538 *
3539 * Output:
3540 * rax - int crc result
3541 */
3542 address StubGenerator::generate_updateBytesCRC32() {
3543 assert(UseCRC32Intrinsics, "need AVX and CLMUL instructions");
3544
3545 StubId stub_id = StubId::stubgen_updateBytesCRC32_id;
3546 int entry_count = StubInfo::entry_count(stub_id);
3547 assert(entry_count == 1, "sanity check");
3548 address start = load_archive_data(stub_id);
3549 if (start != nullptr) {
3550 return start;
3551 }
3552 __ align(CodeEntryAlignment);
3553 StubCodeMark mark(this, stub_id);
3554
3555 start = __ pc();
3556
3557 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
3558 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
3559 // rscratch1: r10
3560 const Register crc = c_rarg0; // crc
3561 const Register buf = c_rarg1; // source java byte array address
3562 const Register len = c_rarg2; // length
3563 const Register table = c_rarg3; // crc_table address (reuse register)
3564 const Register tmp1 = r11;
3565 const Register tmp2 = r10;
3566 assert_different_registers(crc, buf, len, table, tmp1, tmp2, rax);
3567
3568 BLOCK_COMMENT("Entry:");
3569 __ enter(); // required for proper stackwalking of RuntimeStub frame
3570
3571 if (VM_Version::supports_sse4_1() && VM_Version::supports_avx512_vpclmulqdq() &&
3572 VM_Version::supports_avx512bw() &&
3573 VM_Version::supports_avx512vl()) {
3574 // The constants used in the CRC32 algorithm requires the 1's compliment of the initial crc value.
3575 // However, the constant table for CRC32-C assumes the original crc value. Account for this
3576 // difference before calling and after returning.
3577 __ lea(table, ExternalAddress(StubRoutines::x86::crc_table_avx512_addr()));
3578 __ notl(crc);
3579 __ kernel_crc32_avx512(crc, buf, len, table, tmp1, tmp2);
3580 __ notl(crc);
3581 } else {
3582 __ kernel_crc32(crc, buf, len, table, tmp1);
3583 }
3584
3585 __ movl(rax, crc);
3586 __ vzeroupper();
3587 __ leave(); // required for proper stackwalking of RuntimeStub frame
3588 __ ret(0);
3589
3590 // record the stub entry and end
3591 store_archive_data(stub_id, start, __ pc());
3592
3593 return start;
3594 }
3595
3596 /**
3597 * Arguments:
3598 *
3599 * Inputs:
3600 * c_rarg0 - int crc
3601 * c_rarg1 - byte* buf
3602 * c_rarg2 - long length
3603 * c_rarg3 - table_start - optional (present only when doing a library_call,
3604 * not used by x86 algorithm)
3605 *
3606 * Output:
3607 * rax - int crc result
3608 */
3609 address StubGenerator::generate_updateBytesCRC32C(bool is_pclmulqdq_supported) {
3610 assert(UseCRC32CIntrinsics, "need SSE4_2");
3611 StubId stub_id = StubId::stubgen_updateBytesCRC32C_id;
3612 int entry_count = StubInfo::entry_count(stub_id);
3613 assert(entry_count == 1, "sanity check");
3614 address start = load_archive_data(stub_id);
3615 if (start != nullptr) {
3616 return start;
3617 }
3618 __ align(CodeEntryAlignment);
3619 StubCodeMark mark(this, stub_id);
3620 start = __ pc();
3621
3622 //reg.arg int#0 int#1 int#2 int#3 int#4 int#5 float regs
3623 //Windows RCX RDX R8 R9 none none XMM0..XMM3
3624 //Lin / Sol RDI RSI RDX RCX R8 R9 XMM0..XMM7
3625 const Register crc = c_rarg0; // crc
3626 const Register buf = c_rarg1; // source java byte array address
3627 const Register len = c_rarg2; // length
3628 const Register a = rax;
3629 const Register j = r9;
3630 const Register k = r10;
3631 const Register l = r11;
3632 #ifdef _WIN64
3633 const Register y = rdi;
3634 const Register z = rsi;
3635 #else
3636 const Register y = rcx;
3637 const Register z = r8;
3638 #endif
3639 assert_different_registers(crc, buf, len, a, j, k, l, y, z);
3640
3641 BLOCK_COMMENT("Entry:");
3642 __ enter(); // required for proper stackwalking of RuntimeStub frame
3643 Label L_continue;
3644
3645 if (VM_Version::supports_sse4_1() && VM_Version::supports_avx512_vpclmulqdq() &&
3646 VM_Version::supports_avx512bw() &&
3647 VM_Version::supports_avx512vl()) {
3648 Label L_doSmall;
3649
3650 __ cmpl(len, 384);
3651 __ jcc(Assembler::lessEqual, L_doSmall);
3652
3653 __ lea(j, ExternalAddress(StubRoutines::x86::crc32c_table_avx512_addr()));
3654 __ kernel_crc32_avx512(crc, buf, len, j, l, k);
3655
3656 __ jmp(L_continue);
3657
3658 __ bind(L_doSmall);
3659 }
3660 #ifdef _WIN64
3661 __ push_ppx(y);
3662 __ push_ppx(z);
3663 #endif
3664 __ crc32c_ipl_alg2_alt2(crc, buf, len,
3665 a, j, k,
3666 l, y, z,
3667 c_farg0, c_farg1, c_farg2,
3668 is_pclmulqdq_supported);
3669 #ifdef _WIN64
3670 __ pop_ppx(z);
3671 __ pop_ppx(y);
3672 #endif
3673
3674 __ bind(L_continue);
3675 __ movl(rax, crc);
3676 __ vzeroupper();
3677 __ leave(); // required for proper stackwalking of RuntimeStub frame
3678 __ ret(0);
3679
3680 // record the stub entry and end
3681 store_archive_data(stub_id, start, __ pc());
3682
3683 return start;
3684 }
3685
3686
3687 /**
3688 * Arguments:
3689 *
3690 * Input:
3691 * c_rarg0 - x address
3692 * c_rarg1 - x length
3693 * c_rarg2 - y address
3694 * c_rarg3 - y length
3695 * not Win64
3696 * c_rarg4 - z address
3697 * Win64
3698 * rsp+40 - z address
3699 */
3700 address StubGenerator::generate_multiplyToLen() {
3701 StubId stub_id = StubId::stubgen_multiplyToLen_id;
3702 int entry_count = StubInfo::entry_count(stub_id);
3703 assert(entry_count == 1, "sanity check");
3704 address start = load_archive_data(stub_id);
3705 if (start != nullptr) {
3706 return start;
3707 }
3708 __ align(CodeEntryAlignment);
3709 StubCodeMark mark(this, stub_id);
3710 start = __ pc();
3711
3712 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
3713 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
3714 const Register x = rdi;
3715 const Register xlen = rax;
3716 const Register y = rsi;
3717 const Register ylen = rcx;
3718 const Register z = r8;
3719
3720 // Next registers will be saved on stack in multiply_to_len().
3721 const Register tmp0 = r11;
3722 const Register tmp1 = r12;
3723 const Register tmp2 = r13;
3724 const Register tmp3 = r14;
3725 const Register tmp4 = r15;
3726 const Register tmp5 = rbx;
3727
3728 BLOCK_COMMENT("Entry:");
3729 __ enter(); // required for proper stackwalking of RuntimeStub frame
3730
3731 setup_arg_regs(4); // x => rdi, xlen => rsi, y => rdx
3732 // ylen => rcx, z => r8
3733 // r9 and r10 may be used to save non-volatile registers
3734 #ifdef _WIN64
3735 // last argument (#4) is on stack on Win64
3736 __ movptr(z, Address(rsp, 6 * wordSize));
3737 #endif
3738
3739 __ movptr(xlen, rsi);
3740 __ movptr(y, rdx);
3741 __ multiply_to_len(x, xlen, y, ylen, z, tmp0, tmp1, tmp2, tmp3, tmp4, tmp5);
3742
3743 restore_arg_regs();
3744
3745 __ leave(); // required for proper stackwalking of RuntimeStub frame
3746 __ ret(0);
3747
3748 // record the stub entry and end
3749 store_archive_data(stub_id, start, __ pc());
3750
3751 return start;
3752 }
3753
3754 /**
3755 * Arguments:
3756 *
3757 * Input:
3758 * c_rarg0 - obja address
3759 * c_rarg1 - objb address
3760 * c_rarg3 - length length
3761 * c_rarg4 - scale log2_array_indxscale
3762 *
3763 * Output:
3764 * rax - int >= mismatched index, < 0 bitwise complement of tail
3765 */
3766 address StubGenerator::generate_vectorizedMismatch() {
3767 StubId stub_id = StubId::stubgen_vectorizedMismatch_id;
3768 int entry_count = StubInfo::entry_count(stub_id);
3769 assert(entry_count == 1, "sanity check");
3770 address start = load_archive_data(stub_id);
3771 if (start != nullptr) {
3772 return start;
3773 }
3774 __ align(CodeEntryAlignment);
3775 StubCodeMark mark(this, stub_id);
3776 start = __ pc();
3777
3778 BLOCK_COMMENT("Entry:");
3779 __ enter();
3780
3781 #ifdef _WIN64 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
3782 const Register scale = c_rarg0; //rcx, will exchange with r9
3783 const Register objb = c_rarg1; //rdx
3784 const Register length = c_rarg2; //r8
3785 const Register obja = c_rarg3; //r9
3786 __ xchgq(obja, scale); //now obja and scale contains the correct contents
3787
3788 const Register tmp1 = r10;
3789 const Register tmp2 = r11;
3790 #endif
3791 #ifndef _WIN64 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
3792 const Register obja = c_rarg0; //U:rdi
3793 const Register objb = c_rarg1; //U:rsi
3794 const Register length = c_rarg2; //U:rdx
3795 const Register scale = c_rarg3; //U:rcx
3796 const Register tmp1 = r8;
3797 const Register tmp2 = r9;
3798 #endif
3799 const Register result = rax; //return value
3800 const XMMRegister vec0 = xmm0;
3801 const XMMRegister vec1 = xmm1;
3802 const XMMRegister vec2 = xmm2;
3803
3804 __ vectorized_mismatch(obja, objb, length, scale, result, tmp1, tmp2, vec0, vec1, vec2);
3805
3806 __ vzeroupper();
3807 __ leave();
3808 __ ret(0);
3809
3810 // record the stub entry and end
3811 store_archive_data(stub_id, start, __ pc());
3812
3813 return start;
3814 }
3815
3816 /**
3817 * Arguments:
3818 *
3819 // Input:
3820 // c_rarg0 - x address
3821 // c_rarg1 - x length
3822 // c_rarg2 - z address
3823 // c_rarg3 - z length
3824 *
3825 */
3826 address StubGenerator::generate_squareToLen() {
3827
3828 StubId stub_id = StubId::stubgen_squareToLen_id;
3829 int entry_count = StubInfo::entry_count(stub_id);
3830 assert(entry_count == 1, "sanity check");
3831 address start = load_archive_data(stub_id);
3832 if (start != nullptr) {
3833 return start;
3834 }
3835 __ align(CodeEntryAlignment);
3836 StubCodeMark mark(this, stub_id);
3837 start = __ pc();
3838
3839 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
3840 // Unix: rdi, rsi, rdx, rcx (c_rarg0, c_rarg1, ...)
3841 const Register x = rdi;
3842 const Register len = rsi;
3843 const Register z = r8;
3844 const Register zlen = rcx;
3845
3846 const Register tmp1 = r12;
3847 const Register tmp2 = r13;
3848 const Register tmp3 = r14;
3849 const Register tmp4 = r15;
3850 const Register tmp5 = rbx;
3851
3852 BLOCK_COMMENT("Entry:");
3853 __ enter(); // required for proper stackwalking of RuntimeStub frame
3854
3855 setup_arg_regs(4); // x => rdi, len => rsi, z => rdx
3856 // zlen => rcx
3857 // r9 and r10 may be used to save non-volatile registers
3858 __ movptr(r8, rdx);
3859 __ square_to_len(x, len, z, zlen, tmp1, tmp2, tmp3, tmp4, tmp5, rdx, rax);
3860
3861 restore_arg_regs();
3862
3863 __ leave(); // required for proper stackwalking of RuntimeStub frame
3864 __ ret(0);
3865
3866 // record the stub entry and end
3867 store_archive_data(stub_id, start, __ pc());
3868
3869 return start;
3870 }
3871
3872 address StubGenerator::generate_method_entry_barrier() {
3873 StubId stub_id = StubId::stubgen_method_entry_barrier_id;
3874 int entry_count = StubInfo::entry_count(stub_id);
3875 assert(entry_count == 1, "sanity check");
3876 address start = load_archive_data(stub_id);
3877 if (start != nullptr) {
3878 return start;
3879 }
3880 __ align(CodeEntryAlignment);
3881 StubCodeMark mark(this, stub_id);
3882 start = __ pc();
3883
3884 Label deoptimize_label;
3885
3886 __ push(-1); // cookie, this is used for writing the new rsp when deoptimizing
3887
3888 BLOCK_COMMENT("Entry:");
3889 __ enter(); // save rbp
3890
3891 // save c_rarg0, because we want to use that value.
3892 // We could do without it but then we depend on the number of slots used by pusha
3893 __ push_ppx(c_rarg0);
3894
3895 __ lea(c_rarg0, Address(rsp, wordSize * 3)); // 1 for cookie, 1 for rbp, 1 for c_rarg0 - this should be the return address
3896
3897 __ pusha();
3898
3899 // The method may have floats as arguments, and we must spill them before calling
3900 // the VM runtime.
3901 assert(Argument::n_float_register_parameters_j == 8, "Assumption");
3902 const int xmm_size = wordSize * 2;
3903 const int xmm_spill_size = xmm_size * Argument::n_float_register_parameters_j;
3904 __ subptr(rsp, xmm_spill_size);
3905 __ movdqu(Address(rsp, xmm_size * 7), xmm7);
3906 __ movdqu(Address(rsp, xmm_size * 6), xmm6);
3907 __ movdqu(Address(rsp, xmm_size * 5), xmm5);
3908 __ movdqu(Address(rsp, xmm_size * 4), xmm4);
3909 __ movdqu(Address(rsp, xmm_size * 3), xmm3);
3910 __ movdqu(Address(rsp, xmm_size * 2), xmm2);
3911 __ movdqu(Address(rsp, xmm_size * 1), xmm1);
3912 __ movdqu(Address(rsp, xmm_size * 0), xmm0);
3913
3914 __ call_VM_leaf(CAST_FROM_FN_PTR(address, static_cast<int (*)(address*)>(BarrierSetNMethod::nmethod_stub_entry_barrier)), 1);
3915
3916 __ movdqu(xmm0, Address(rsp, xmm_size * 0));
3917 __ movdqu(xmm1, Address(rsp, xmm_size * 1));
3918 __ movdqu(xmm2, Address(rsp, xmm_size * 2));
3919 __ movdqu(xmm3, Address(rsp, xmm_size * 3));
3920 __ movdqu(xmm4, Address(rsp, xmm_size * 4));
3921 __ movdqu(xmm5, Address(rsp, xmm_size * 5));
3922 __ movdqu(xmm6, Address(rsp, xmm_size * 6));
3923 __ movdqu(xmm7, Address(rsp, xmm_size * 7));
3924 __ addptr(rsp, xmm_spill_size);
3925
3926 __ cmpl(rax, 1); // 1 means deoptimize
3927 __ jcc(Assembler::equal, deoptimize_label);
3928
3929 __ popa();
3930 __ pop_ppx(c_rarg0);
3931
3932 __ leave();
3933
3934 __ addptr(rsp, 1 * wordSize); // cookie
3935 __ ret(0);
3936
3937
3938 __ BIND(deoptimize_label);
3939
3940 __ popa();
3941 __ pop_ppx(c_rarg0);
3942
3943 __ leave();
3944
3945 // this can be taken out, but is good for verification purposes. getting a SIGSEGV
3946 // here while still having a correct stack is valuable
3947 __ testptr(rsp, Address(rsp, 0));
3948
3949 __ movptr(rsp, Address(rsp, 0)); // new rsp was written in the barrier
3950 __ jmp(Address(rsp, -1 * wordSize)); // jmp target should be callers verified_entry_point
3951
3952 // record the stub entry and end
3953 store_archive_data(stub_id, start, __ pc());
3954
3955 return start;
3956 }
3957
3958 /**
3959 * Arguments:
3960 *
3961 * Input:
3962 * c_rarg0 - out address
3963 * c_rarg1 - in address
3964 * c_rarg2 - offset
3965 * c_rarg3 - len
3966 * not Win64
3967 * c_rarg4 - k
3968 * Win64
3969 * rsp+40 - k
3970 */
3971 address StubGenerator::generate_mulAdd() {
3972 StubId stub_id = StubId::stubgen_mulAdd_id;
3973 int entry_count = StubInfo::entry_count(stub_id);
3974 assert(entry_count == 1, "sanity check");
3975 address start = load_archive_data(stub_id);
3976 if (start != nullptr) {
3977 return start;
3978 }
3979 __ align(CodeEntryAlignment);
3980 StubCodeMark mark(this, stub_id);
3981 start = __ pc();
3982
3983 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
3984 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
3985 const Register out = rdi;
3986 const Register in = rsi;
3987 const Register offset = r11;
3988 const Register len = rcx;
3989 const Register k = r8;
3990
3991 // Next registers will be saved on stack in mul_add().
3992 const Register tmp1 = r12;
3993 const Register tmp2 = r13;
3994 const Register tmp3 = r14;
3995 const Register tmp4 = r15;
3996 const Register tmp5 = rbx;
3997
3998 BLOCK_COMMENT("Entry:");
3999 __ enter(); // required for proper stackwalking of RuntimeStub frame
4000
4001 setup_arg_regs(4); // out => rdi, in => rsi, offset => rdx
4002 // len => rcx, k => r8
4003 // r9 and r10 may be used to save non-volatile registers
4004 #ifdef _WIN64
4005 // last argument is on stack on Win64
4006 __ movl(k, Address(rsp, 6 * wordSize));
4007 #endif
4008 __ movptr(r11, rdx); // move offset in rdx to offset(r11)
4009 __ mul_add(out, in, offset, len, k, tmp1, tmp2, tmp3, tmp4, tmp5, rdx, rax);
4010
4011 restore_arg_regs();
4012
4013 __ leave(); // required for proper stackwalking of RuntimeStub frame
4014 __ ret(0);
4015
4016 // record the stub entry and end
4017 store_archive_data(stub_id, start, __ pc());
4018
4019 return start;
4020 }
4021
4022 address StubGenerator::generate_bigIntegerRightShift() {
4023 StubId stub_id = StubId::stubgen_bigIntegerRightShiftWorker_id;
4024 int entry_count = StubInfo::entry_count(stub_id);
4025 assert(entry_count == 1, "sanity check");
4026 address start = load_archive_data(stub_id);
4027 if (start != nullptr) {
4028 return start;
4029 }
4030 __ align(CodeEntryAlignment);
4031 StubCodeMark mark(this, stub_id);
4032 start = __ pc();
4033
4034 Label Shift512Loop, ShiftTwo, ShiftTwoLoop, ShiftOne, Exit;
4035 // For Unix, the arguments are as follows: rdi, rsi, rdx, rcx, r8.
4036 const Register newArr = rdi;
4037 const Register oldArr = rsi;
4038 const Register newIdx = rdx;
4039 const Register shiftCount = rcx; // It was intentional to have shiftCount in rcx since it is used implicitly for shift.
4040 const Register totalNumIter = r8;
4041
4042 // For windows, we use r9 and r10 as temps to save rdi and rsi. Thus we cannot allocate them for our temps.
4043 // For everything else, we prefer using r9 and r10 since we do not have to save them before use.
4044 const Register tmp1 = r11; // Caller save.
4045 const Register tmp2 = rax; // Caller save.
4046 const Register tmp3 = WIN64_ONLY(r12) NOT_WIN64(r9); // Windows: Callee save. Linux: Caller save.
4047 const Register tmp4 = WIN64_ONLY(r13) NOT_WIN64(r10); // Windows: Callee save. Linux: Caller save.
4048 const Register tmp5 = r14; // Callee save.
4049 const Register tmp6 = r15;
4050
4051 const XMMRegister x0 = xmm0;
4052 const XMMRegister x1 = xmm1;
4053 const XMMRegister x2 = xmm2;
4054
4055 BLOCK_COMMENT("Entry:");
4056 __ enter(); // required for proper stackwalking of RuntimeStub frame
4057
4058 #ifdef _WIN64
4059 setup_arg_regs(4);
4060 // For windows, since last argument is on stack, we need to move it to the appropriate register.
4061 __ movl(totalNumIter, Address(rsp, 6 * wordSize));
4062 // Save callee save registers.
4063 __ push_ppx(tmp3);
4064 __ push_ppx(tmp4);
4065 #endif
4066 __ push_ppx(tmp5);
4067
4068 // Rename temps used throughout the code.
4069 const Register idx = tmp1;
4070 const Register nIdx = tmp2;
4071
4072 __ xorl(idx, idx);
4073
4074 // Start right shift from end of the array.
4075 // For example, if #iteration = 4 and newIdx = 1
4076 // then dest[4] = src[4] >> shiftCount | src[3] <<< (shiftCount - 32)
4077 // if #iteration = 4 and newIdx = 0
4078 // then dest[3] = src[4] >> shiftCount | src[3] <<< (shiftCount - 32)
4079 __ movl(idx, totalNumIter);
4080 __ movl(nIdx, idx);
4081 __ addl(nIdx, newIdx);
4082
4083 // If vectorization is enabled, check if the number of iterations is at least 64
4084 // If not, then go to ShifTwo processing 2 iterations
4085 if (VM_Version::supports_avx512_vbmi2()) {
4086 __ cmpptr(totalNumIter, (AVX3Threshold/64));
4087 __ jcc(Assembler::less, ShiftTwo);
4088
4089 if (AVX3Threshold < 16 * 64) {
4090 __ cmpl(totalNumIter, 16);
4091 __ jcc(Assembler::less, ShiftTwo);
4092 }
4093 __ evpbroadcastd(x0, shiftCount, Assembler::AVX_512bit);
4094 __ subl(idx, 16);
4095 __ subl(nIdx, 16);
4096 __ BIND(Shift512Loop);
4097 __ evmovdqul(x2, Address(oldArr, idx, Address::times_4, 4), Assembler::AVX_512bit);
4098 __ evmovdqul(x1, Address(oldArr, idx, Address::times_4), Assembler::AVX_512bit);
4099 __ vpshrdvd(x2, x1, x0, Assembler::AVX_512bit);
4100 __ evmovdqul(Address(newArr, nIdx, Address::times_4), x2, Assembler::AVX_512bit);
4101 __ subl(nIdx, 16);
4102 __ subl(idx, 16);
4103 __ jcc(Assembler::greaterEqual, Shift512Loop);
4104 __ addl(idx, 16);
4105 __ addl(nIdx, 16);
4106 }
4107 __ BIND(ShiftTwo);
4108 __ cmpl(idx, 2);
4109 __ jcc(Assembler::less, ShiftOne);
4110 __ subl(idx, 2);
4111 __ subl(nIdx, 2);
4112 __ BIND(ShiftTwoLoop);
4113 __ movl(tmp5, Address(oldArr, idx, Address::times_4, 8));
4114 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 4));
4115 __ movl(tmp3, Address(oldArr, idx, Address::times_4));
4116 __ shrdl(tmp5, tmp4);
4117 __ shrdl(tmp4, tmp3);
4118 __ movl(Address(newArr, nIdx, Address::times_4, 4), tmp5);
4119 __ movl(Address(newArr, nIdx, Address::times_4), tmp4);
4120 __ subl(nIdx, 2);
4121 __ subl(idx, 2);
4122 __ jcc(Assembler::greaterEqual, ShiftTwoLoop);
4123 __ addl(idx, 2);
4124 __ addl(nIdx, 2);
4125
4126 // Do the last iteration
4127 __ BIND(ShiftOne);
4128 __ cmpl(idx, 1);
4129 __ jcc(Assembler::less, Exit);
4130 __ subl(idx, 1);
4131 __ subl(nIdx, 1);
4132 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 4));
4133 __ movl(tmp3, Address(oldArr, idx, Address::times_4));
4134 __ shrdl(tmp4, tmp3);
4135 __ movl(Address(newArr, nIdx, Address::times_4), tmp4);
4136 __ BIND(Exit);
4137 __ vzeroupper();
4138 // Restore callee save registers.
4139 __ pop_ppx(tmp5);
4140 #ifdef _WIN64
4141 __ pop_ppx(tmp4);
4142 __ pop_ppx(tmp3);
4143 restore_arg_regs();
4144 #endif
4145 __ leave(); // required for proper stackwalking of RuntimeStub frame
4146 __ ret(0);
4147
4148 // record the stub entry and end
4149 store_archive_data(stub_id, start, __ pc());
4150
4151 return start;
4152 }
4153
4154 /**
4155 * Arguments:
4156 *
4157 * Input:
4158 * c_rarg0 - newArr address
4159 * c_rarg1 - oldArr address
4160 * c_rarg2 - newIdx
4161 * c_rarg3 - shiftCount
4162 * not Win64
4163 * c_rarg4 - numIter
4164 * Win64
4165 * rsp40 - numIter
4166 */
4167 address StubGenerator::generate_bigIntegerLeftShift() {
4168 StubId stub_id = StubId::stubgen_bigIntegerLeftShiftWorker_id;
4169 int entry_count = StubInfo::entry_count(stub_id);
4170 assert(entry_count == 1, "sanity check");
4171 address start = load_archive_data(stub_id);
4172 if (start != nullptr) {
4173 return start;
4174 }
4175 __ align(CodeEntryAlignment);
4176 StubCodeMark mark(this, stub_id);
4177 start = __ pc();
4178
4179 Label Shift512Loop, ShiftTwo, ShiftTwoLoop, ShiftOne, Exit;
4180 // For Unix, the arguments are as follows: rdi, rsi, rdx, rcx, r8.
4181 const Register newArr = rdi;
4182 const Register oldArr = rsi;
4183 const Register newIdx = rdx;
4184 const Register shiftCount = rcx; // It was intentional to have shiftCount in rcx since it is used implicitly for shift.
4185 const Register totalNumIter = r8;
4186 // For windows, we use r9 and r10 as temps to save rdi and rsi. Thus we cannot allocate them for our temps.
4187 // For everything else, we prefer using r9 and r10 since we do not have to save them before use.
4188 const Register tmp1 = r11; // Caller save.
4189 const Register tmp2 = rax; // Caller save.
4190 const Register tmp3 = WIN64_ONLY(r12) NOT_WIN64(r9); // Windows: Callee save. Linux: Caller save.
4191 const Register tmp4 = WIN64_ONLY(r13) NOT_WIN64(r10); // Windows: Callee save. Linux: Caller save.
4192 const Register tmp5 = r14; // Callee save.
4193
4194 const XMMRegister x0 = xmm0;
4195 const XMMRegister x1 = xmm1;
4196 const XMMRegister x2 = xmm2;
4197 BLOCK_COMMENT("Entry:");
4198 __ enter(); // required for proper stackwalking of RuntimeStub frame
4199
4200 #ifdef _WIN64
4201 setup_arg_regs(4);
4202 // For windows, since last argument is on stack, we need to move it to the appropriate register.
4203 __ movl(totalNumIter, Address(rsp, 6 * wordSize));
4204 // Save callee save registers.
4205 __ push_ppx(tmp3);
4206 __ push_ppx(tmp4);
4207 #endif
4208 __ push_ppx(tmp5);
4209
4210 // Rename temps used throughout the code
4211 const Register idx = tmp1;
4212 const Register numIterTmp = tmp2;
4213
4214 // Start idx from zero.
4215 __ xorl(idx, idx);
4216 // Compute interior pointer for new array. We do this so that we can use same index for both old and new arrays.
4217 __ lea(newArr, Address(newArr, newIdx, Address::times_4));
4218 __ movl(numIterTmp, totalNumIter);
4219
4220 // If vectorization is enabled, check if the number of iterations is at least 64
4221 // If not, then go to ShiftTwo shifting two numbers at a time
4222 if (VM_Version::supports_avx512_vbmi2()) {
4223 __ cmpl(totalNumIter, (AVX3Threshold/64));
4224 __ jcc(Assembler::less, ShiftTwo);
4225
4226 if (AVX3Threshold < 16 * 64) {
4227 __ cmpl(totalNumIter, 16);
4228 __ jcc(Assembler::less, ShiftTwo);
4229 }
4230 __ evpbroadcastd(x0, shiftCount, Assembler::AVX_512bit);
4231 __ subl(numIterTmp, 16);
4232 __ BIND(Shift512Loop);
4233 __ evmovdqul(x1, Address(oldArr, idx, Address::times_4), Assembler::AVX_512bit);
4234 __ evmovdqul(x2, Address(oldArr, idx, Address::times_4, 0x4), Assembler::AVX_512bit);
4235 __ vpshldvd(x1, x2, x0, Assembler::AVX_512bit);
4236 __ evmovdqul(Address(newArr, idx, Address::times_4), x1, Assembler::AVX_512bit);
4237 __ addl(idx, 16);
4238 __ subl(numIterTmp, 16);
4239 __ jcc(Assembler::greaterEqual, Shift512Loop);
4240 __ addl(numIterTmp, 16);
4241 }
4242 __ BIND(ShiftTwo);
4243 __ cmpl(totalNumIter, 1);
4244 __ jcc(Assembler::less, Exit);
4245 __ movl(tmp3, Address(oldArr, idx, Address::times_4));
4246 __ subl(numIterTmp, 2);
4247 __ jcc(Assembler::less, ShiftOne);
4248
4249 __ BIND(ShiftTwoLoop);
4250 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 0x4));
4251 __ movl(tmp5, Address(oldArr, idx, Address::times_4, 0x8));
4252 __ shldl(tmp3, tmp4);
4253 __ shldl(tmp4, tmp5);
4254 __ movl(Address(newArr, idx, Address::times_4), tmp3);
4255 __ movl(Address(newArr, idx, Address::times_4, 0x4), tmp4);
4256 __ movl(tmp3, tmp5);
4257 __ addl(idx, 2);
4258 __ subl(numIterTmp, 2);
4259 __ jcc(Assembler::greaterEqual, ShiftTwoLoop);
4260
4261 // Do the last iteration
4262 __ BIND(ShiftOne);
4263 __ addl(numIterTmp, 2);
4264 __ cmpl(numIterTmp, 1);
4265 __ jcc(Assembler::less, Exit);
4266 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 0x4));
4267 __ shldl(tmp3, tmp4);
4268 __ movl(Address(newArr, idx, Address::times_4), tmp3);
4269
4270 __ BIND(Exit);
4271 __ vzeroupper();
4272 // Restore callee save registers.
4273 __ pop_ppx(tmp5);
4274 #ifdef _WIN64
4275 __ pop_ppx(tmp4);
4276 __ pop_ppx(tmp3);
4277 restore_arg_regs();
4278 #endif
4279 __ leave(); // required for proper stackwalking of RuntimeStub frame
4280 __ ret(0);
4281
4282 // record the stub entry and end
4283 store_archive_data(stub_id, start, __ pc());
4284
4285 return start;
4286 }
4287
4288 void StubGenerator::generate_libm_stubs() {
4289 if (UseLibmIntrinsic && InlineIntrinsics) {
4290 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dsin)) {
4291 StubRoutines::_dsin = generate_libmSin(); // from stubGenerator_x86_64_sin.cpp
4292 }
4293 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dcos)) {
4294 StubRoutines::_dcos = generate_libmCos(); // from stubGenerator_x86_64_cos.cpp
4295 }
4296 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dtan)) {
4297 StubRoutines::_dtan = generate_libmTan(); // from stubGenerator_x86_64_tan.cpp
4298 }
4299 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dsinh)) {
4300 StubRoutines::_dsinh = generate_libmSinh(); // from stubGenerator_x86_64_sinh.cpp
4301 }
4302 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dtanh)) {
4303 StubRoutines::_dtanh = generate_libmTanh(); // from stubGenerator_x86_64_tanh.cpp
4304 }
4305 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dcbrt)) {
4306 StubRoutines::_dcbrt = generate_libmCbrt(); // from stubGenerator_x86_64_cbrt.cpp
4307 }
4308 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dexp)) {
4309 StubRoutines::_dexp = generate_libmExp(); // from stubGenerator_x86_64_exp.cpp
4310 }
4311 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dpow)) {
4312 StubRoutines::_dpow = generate_libmPow(); // from stubGenerator_x86_64_pow.cpp
4313 }
4314 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dlog)) {
4315 StubRoutines::_dlog = generate_libmLog(); // from stubGenerator_x86_64_log.cpp
4316 }
4317 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dlog10)) {
4318 StubRoutines::_dlog10 = generate_libmLog10(); // from stubGenerator_x86_64_log.cpp
4319 }
4320 }
4321 }
4322
4323 /**
4324 * Arguments:
4325 *
4326 * Input:
4327 * c_rarg0 - float16 jshort
4328 *
4329 * Output:
4330 * xmm0 - float
4331 */
4332 address StubGenerator::generate_float16ToFloat() {
4333 StubId stub_id = StubId::stubgen_hf2f_id;
4334 int entry_count = StubInfo::entry_count(stub_id);
4335 assert(entry_count == 1, "sanity check");
4336 address start = load_archive_data(stub_id);
4337 if (start != nullptr) {
4338 return start;
4339 }
4340 StubCodeMark mark(this, stub_id);
4341
4342 start = __ pc();
4343
4344 BLOCK_COMMENT("Entry:");
4345 // No need for RuntimeStub frame since it is called only during JIT compilation
4346
4347 // Load value into xmm0 and convert
4348 __ flt16_to_flt(xmm0, c_rarg0);
4349
4350 __ ret(0);
4351
4352 // record the stub entry and end
4353 store_archive_data(stub_id, start, __ pc());
4354
4355 return start;
4356 }
4357
4358 /**
4359 * Arguments:
4360 *
4361 * Input:
4362 * xmm0 - float
4363 *
4364 * Output:
4365 * rax - float16 jshort
4366 */
4367 address StubGenerator::generate_floatToFloat16() {
4368 StubId stub_id = StubId::stubgen_f2hf_id;
4369 int entry_count = StubInfo::entry_count(stub_id);
4370 assert(entry_count == 1, "sanity check");
4371 address start = load_archive_data(stub_id);
4372 if (start != nullptr) {
4373 return start;
4374 }
4375 StubCodeMark mark(this, stub_id);
4376
4377 start = __ pc();
4378
4379 BLOCK_COMMENT("Entry:");
4380 // No need for RuntimeStub frame since it is called only during JIT compilation
4381
4382 // Convert and put result into rax
4383 __ flt_to_flt16(rax, xmm0, xmm1);
4384
4385 __ ret(0);
4386
4387 // record the stub entry and end
4388 store_archive_data(stub_id, start, __ pc());
4389
4390 return start;
4391 }
4392
4393 static void save_return_registers(MacroAssembler* masm) {
4394 masm->push_ppx(rax);
4395 if (InlineTypeReturnedAsFields) {
4396 masm->push(rdi);
4397 masm->push(rsi);
4398 masm->push(rdx);
4399 masm->push(rcx);
4400 masm->push(r8);
4401 masm->push(r9);
4402 }
4403 masm->push_d(xmm0);
4404 if (InlineTypeReturnedAsFields) {
4405 masm->push_d(xmm1);
4406 masm->push_d(xmm2);
4407 masm->push_d(xmm3);
4408 masm->push_d(xmm4);
4409 masm->push_d(xmm5);
4410 masm->push_d(xmm6);
4411 masm->push_d(xmm7);
4412 }
4413 #ifdef ASSERT
4414 masm->movq(rax, 0xBADC0FFE);
4415 masm->movq(rdi, rax);
4416 masm->movq(rsi, rax);
4417 masm->movq(rdx, rax);
4418 masm->movq(rcx, rax);
4419 masm->movq(r8, rax);
4420 masm->movq(r9, rax);
4421 masm->movq(xmm0, rax);
4422 masm->movq(xmm1, rax);
4423 masm->movq(xmm2, rax);
4424 masm->movq(xmm3, rax);
4425 masm->movq(xmm4, rax);
4426 masm->movq(xmm5, rax);
4427 masm->movq(xmm6, rax);
4428 masm->movq(xmm7, rax);
4429 #endif
4430 }
4431
4432 static void restore_return_registers(MacroAssembler* masm) {
4433 if (InlineTypeReturnedAsFields) {
4434 masm->pop_d(xmm7);
4435 masm->pop_d(xmm6);
4436 masm->pop_d(xmm5);
4437 masm->pop_d(xmm4);
4438 masm->pop_d(xmm3);
4439 masm->pop_d(xmm2);
4440 masm->pop_d(xmm1);
4441 }
4442 masm->pop_d(xmm0);
4443 if (InlineTypeReturnedAsFields) {
4444 masm->pop(r9);
4445 masm->pop(r8);
4446 masm->pop(rcx);
4447 masm->pop(rdx);
4448 masm->pop(rsi);
4449 masm->pop(rdi);
4450 }
4451 masm->pop_ppx(rax);
4452 }
4453
4454 address StubGenerator::generate_cont_thaw(StubId stub_id) {
4455 if (!Continuations::enabled()) return nullptr;
4456
4457 bool return_barrier;
4458 bool return_barrier_exception;
4459 Continuation::thaw_kind kind;
4460
4461 switch (stub_id) {
4462 case StubId::stubgen_cont_thaw_id:
4463 return_barrier = false;
4464 return_barrier_exception = false;
4465 kind = Continuation::thaw_top;
4466 break;
4467 case StubId::stubgen_cont_returnBarrier_id:
4468 return_barrier = true;
4469 return_barrier_exception = false;
4470 kind = Continuation::thaw_return_barrier;
4471 break;
4472 case StubId::stubgen_cont_returnBarrierExc_id:
4473 return_barrier = true;
4474 return_barrier_exception = true;
4475 kind = Continuation::thaw_return_barrier_exception;
4476 break;
4477 default:
4478 ShouldNotReachHere();
4479 }
4480 int entry_count = StubInfo::entry_count(stub_id);
4481 assert(entry_count == 1, "sanity check");
4482 address start = load_archive_data(stub_id);
4483 if (start != nullptr) {
4484 return start;
4485 }
4486 StubCodeMark mark(this, stub_id);
4487 start = __ pc();
4488
4489 // TODO: Handle Valhalla return types. May require generating different return barriers.
4490
4491 if (!return_barrier) {
4492 // Pop return address. If we don't do this, we get a drift,
4493 // where the bottom-most frozen frame continuously grows.
4494 __ pop(c_rarg3);
4495 } else {
4496 __ movptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
4497 }
4498
4499 #ifdef ASSERT
4500 {
4501 Label L_good_sp;
4502 __ cmpptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
4503 __ jcc(Assembler::equal, L_good_sp);
4504 __ stop("Incorrect rsp at thaw entry");
4505 __ BIND(L_good_sp);
4506 }
4507 #endif // ASSERT
4508
4509 if (return_barrier) {
4510 // Preserve possible return value from a method returning to the return barrier.
4511 save_return_registers(_masm);
4512 }
4513
4514 __ movptr(c_rarg0, r15_thread);
4515 __ movptr(c_rarg1, (return_barrier ? 1 : 0));
4516 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Continuation::prepare_thaw), 2);
4517 __ movptr(rbx, rax);
4518
4519 if (return_barrier) {
4520 // Restore return value from a method returning to the return barrier.
4521 // No safepoint in the call to thaw, so even an oop return value should be OK.
4522 restore_return_registers(_masm);
4523 }
4524
4525 #ifdef ASSERT
4526 {
4527 Label L_good_sp;
4528 __ cmpptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
4529 __ jcc(Assembler::equal, L_good_sp);
4530 __ stop("Incorrect rsp after prepare thaw");
4531 __ BIND(L_good_sp);
4532 }
4533 #endif // ASSERT
4534
4535 // rbx contains the size of the frames to thaw, 0 if overflow or no more frames
4536 Label L_thaw_success;
4537 __ testptr(rbx, rbx);
4538 __ jccb(Assembler::notZero, L_thaw_success);
4539 __ jump(RuntimeAddress(SharedRuntime::throw_StackOverflowError_entry()));
4540 __ bind(L_thaw_success);
4541
4542 // Make room for the thawed frames and align the stack.
4543 __ subptr(rsp, rbx);
4544 __ andptr(rsp, -StackAlignmentInBytes);
4545
4546 if (return_barrier) {
4547 // Preserve possible return value from a method returning to the return barrier. (Again.)
4548 save_return_registers(_masm);
4549 }
4550
4551 // If we want, we can templatize thaw by kind, and have three different entries.
4552 __ movptr(c_rarg0, r15_thread);
4553 __ movptr(c_rarg1, kind);
4554 __ call_VM_leaf(Continuation::thaw_entry(), 2);
4555 __ movptr(rbx, rax);
4556
4557 if (return_barrier) {
4558 // Restore return value from a method returning to the return barrier. (Again.)
4559 // No safepoint in the call to thaw, so even an oop return value should be OK.
4560 restore_return_registers(_masm);
4561 } else {
4562 // Return 0 (success) from doYield.
4563 __ xorptr(rax, rax);
4564 }
4565
4566 // After thawing, rbx is the SP of the yielding frame.
4567 // Move there, and then to saved RBP slot.
4568 __ movptr(rsp, rbx);
4569 __ subptr(rsp, 2*wordSize);
4570
4571 if (return_barrier_exception) {
4572 __ movptr(c_rarg0, r15_thread);
4573 __ movptr(c_rarg1, Address(rsp, wordSize)); // return address
4574
4575 // rax still holds the original exception oop, save it before the call
4576 __ push_ppx(rax);
4577
4578 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), 2);
4579 __ movptr(rbx, rax);
4580
4581 // Continue at exception handler:
4582 // rax: exception oop
4583 // rbx: exception handler
4584 // rdx: exception pc
4585 __ pop_ppx(rax);
4586 __ verify_oop(rax);
4587 __ pop(rbp); // pop out RBP here too
4588 __ pop(rdx);
4589 __ jmp(rbx);
4590 } else {
4591 // We are "returning" into the topmost thawed frame; see Thaw::push_return_frame
4592 __ pop(rbp);
4593 __ ret(0);
4594 }
4595
4596 // record the stub entry and end
4597 store_archive_data(stub_id, start, __ pc());
4598
4599 return start;
4600 }
4601
4602 address StubGenerator::generate_cont_thaw() {
4603 return generate_cont_thaw(StubId::stubgen_cont_thaw_id);
4604 }
4605
4606 // TODO: will probably need multiple return barriers depending on return type
4607
4608 address StubGenerator::generate_cont_returnBarrier() {
4609 return generate_cont_thaw(StubId::stubgen_cont_returnBarrier_id);
4610 }
4611
4612 address StubGenerator::generate_cont_returnBarrier_exception() {
4613 return generate_cont_thaw(StubId::stubgen_cont_returnBarrierExc_id);
4614 }
4615
4616 address StubGenerator::generate_cont_preempt_stub() {
4617 if (!Continuations::enabled()) return nullptr;
4618 StubId stub_id = StubId::stubgen_cont_preempt_id;
4619 int entry_count = StubInfo::entry_count(stub_id);
4620 assert(entry_count == 1, "sanity check");
4621 address start = load_archive_data(stub_id);
4622 if (start != nullptr) {
4623 return start;
4624 }
4625 StubCodeMark mark(this, stub_id);
4626 start = __ pc();
4627
4628 __ reset_last_Java_frame(true);
4629
4630 // Set rsp to enterSpecial frame, i.e. remove all frames copied into the heap.
4631 __ movptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
4632
4633 Label preemption_cancelled;
4634 __ movbool(rscratch1, Address(r15_thread, JavaThread::preemption_cancelled_offset()));
4635 __ testbool(rscratch1);
4636 __ jcc(Assembler::notZero, preemption_cancelled);
4637
4638 // Remove enterSpecial frame from the stack and return to Continuation.run() to unmount.
4639 SharedRuntime::continuation_enter_cleanup(_masm);
4640 __ pop(rbp);
4641 __ ret(0);
4642
4643 // We acquired the monitor after freezing the frames so call thaw to continue execution.
4644 __ bind(preemption_cancelled);
4645 __ movbool(Address(r15_thread, JavaThread::preemption_cancelled_offset()), false);
4646 __ lea(rbp, Address(rsp, checked_cast<int32_t>(ContinuationEntry::size())));
4647 __ movptr(rscratch1, ExternalAddress(ContinuationEntry::thaw_call_pc_address()));
4648 __ jmp(rscratch1);
4649
4650 // record the stub entry and end
4651 store_archive_data(stub_id, start, __ pc());
4652
4653 return start;
4654 }
4655
4656 // exception handler for upcall stubs
4657 address StubGenerator::generate_upcall_stub_exception_handler() {
4658 StubId stub_id = StubId::stubgen_upcall_stub_exception_handler_id;
4659 int entry_count = StubInfo::entry_count(stub_id);
4660 assert(entry_count == 1, "sanity check");
4661 address start = load_archive_data(stub_id);
4662 if (start != nullptr) {
4663 return start;
4664 }
4665 StubCodeMark mark(this, stub_id);
4666 start = __ pc();
4667
4668 // native caller has no idea how to handle exceptions
4669 // we just crash here. Up to callee to catch exceptions.
4670 __ verify_oop(rax);
4671 __ vzeroupper();
4672 __ mov(c_rarg0, rax);
4673 __ andptr(rsp, -StackAlignmentInBytes); // align stack as required by ABI
4674 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
4675 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, UpcallLinker::handle_uncaught_exception)));
4676 __ should_not_reach_here();
4677
4678 // record the stub entry and end
4679 store_archive_data(stub_id, start, __ pc());
4680
4681 return start;
4682 }
4683
4684 // load Method* target of MethodHandle
4685 // j_rarg0 = jobject receiver
4686 // rbx = result
4687 address StubGenerator::generate_upcall_stub_load_target() {
4688 StubId stub_id = StubId::stubgen_upcall_stub_load_target_id;
4689 int entry_count = StubInfo::entry_count(stub_id);
4690 assert(entry_count == 1, "sanity check");
4691 address start = load_archive_data(stub_id);
4692 if (start != nullptr) {
4693 return start;
4694 }
4695 StubCodeMark mark(this, stub_id);
4696 start = __ pc();
4697
4698 __ resolve_global_jobject(j_rarg0, rscratch1);
4699 // Load target method from receiver
4700 __ load_heap_oop(rbx, Address(j_rarg0, java_lang_invoke_MethodHandle::form_offset()), rscratch1);
4701 __ load_heap_oop(rbx, Address(rbx, java_lang_invoke_LambdaForm::vmentry_offset()), rscratch1);
4702 __ load_heap_oop(rbx, Address(rbx, java_lang_invoke_MemberName::method_offset()), rscratch1);
4703 __ access_load_at(T_ADDRESS, IN_HEAP, rbx,
4704 Address(rbx, java_lang_invoke_ResolvedMethodName::vmtarget_offset()),
4705 noreg);
4706 __ movptr(Address(r15_thread, JavaThread::callee_target_offset()), rbx); // just in case callee is deoptimized
4707
4708 __ ret(0);
4709
4710 // record the stub entry and end
4711 store_archive_data(stub_id, start, __ pc());
4712
4713 return start;
4714 }
4715
4716 void StubGenerator::generate_lookup_secondary_supers_table_stub() {
4717 StubId stub_id = StubId::stubgen_lookup_secondary_supers_table_id;
4718 GrowableArray<address> entries;
4719 int entry_count = StubInfo::entry_count(stub_id);
4720 assert(entry_count == Klass::SECONDARY_SUPERS_TABLE_SIZE, "sanity check");
4721 address start = load_archive_data(stub_id, &entries);
4722 if (start != nullptr) {
4723 assert(entries.length() == Klass::SECONDARY_SUPERS_TABLE_SIZE - 1,
4724 "unexpected extra entry count %d", entries.length());
4725 StubRoutines::_lookup_secondary_supers_table_stubs[0] = start;
4726 for (int slot = 1; slot < Klass::SECONDARY_SUPERS_TABLE_SIZE; slot++) {
4727 StubRoutines::_lookup_secondary_supers_table_stubs[slot] = entries.at(slot - 1);
4728 }
4729 return;
4730 }
4731 StubCodeMark mark(this, stub_id);
4732
4733 const Register
4734 r_super_klass = rax,
4735 r_sub_klass = rsi,
4736 result = rdi;
4737
4738 for (int slot = 0; slot < Klass::SECONDARY_SUPERS_TABLE_SIZE; slot++) {
4739 address next_entry = __ pc();
4740 if (slot == 0) {
4741 start = next_entry;
4742 } else {
4743 entries.append(next_entry);
4744 }
4745 StubRoutines::_lookup_secondary_supers_table_stubs[slot] = next_entry;
4746 __ lookup_secondary_supers_table_const(r_sub_klass, r_super_klass,
4747 rdx, rcx, rbx, r11, // temps
4748 result,
4749 slot);
4750 __ ret(0);
4751 }
4752
4753 // record the stub entry and end plus all the auxiliary entries
4754 store_archive_data(stub_id, start, __ pc(), &entries);
4755 }
4756
4757 // Slow path implementation for UseSecondarySupersTable.
4758 address StubGenerator::generate_lookup_secondary_supers_table_slow_path_stub() {
4759 StubId stub_id = StubId::stubgen_lookup_secondary_supers_table_slow_path_id;
4760 int entry_count = StubInfo::entry_count(stub_id);
4761 assert(entry_count == 1, "sanity check");
4762 address start = load_archive_data(stub_id);
4763 if (start != nullptr) {
4764 return start;
4765 }
4766 StubCodeMark mark(this, stub_id);
4767 start = __ pc();
4768
4769 const Register
4770 r_super_klass = rax,
4771 r_array_base = rbx,
4772 r_array_index = rdx,
4773 r_sub_klass = rsi,
4774 r_bitmap = r11,
4775 result = rdi;
4776
4777 Label L_success;
4778 __ lookup_secondary_supers_table_slow_path(r_super_klass, r_array_base, r_array_index, r_bitmap,
4779 rcx, rdi, // temps
4780 &L_success);
4781 // bind(L_failure);
4782 __ movl(result, 1);
4783 __ ret(0);
4784
4785 __ bind(L_success);
4786 __ movl(result, 0);
4787 __ ret(0);
4788
4789 // record the stub entry and end
4790 store_archive_data(stub_id, start, __ pc());
4791
4792 return start;
4793 }
4794
4795 void StubGenerator::create_control_words() {
4796 // Round to nearest, 64-bit mode, exceptions masked, flags specialized
4797 StubRoutines::x86::_mxcsr_std = EnableX86ECoreOpts ? 0x1FBF : 0x1F80;
4798 // Round to zero, 64-bit mode, exceptions masked, flags specialized
4799 StubRoutines::x86::_mxcsr_rz = EnableX86ECoreOpts ? 0x7FBF : 0x7F80;
4800 }
4801
4802 // Initialization
4803 void StubGenerator::generate_preuniverse_stubs() {
4804 // atomic calls
4805 StubRoutines::_fence_entry = generate_orderaccess_fence();
4806 }
4807
4808 void StubGenerator::generate_initial_stubs() {
4809 // Generates all stubs and initializes the entry points
4810
4811 // This platform-specific settings are needed by generate_call_stub()
4812 create_control_words();
4813
4814 // Initialize table for unsafe copy memeory check.
4815 if (UnsafeMemoryAccess::_table == nullptr) {
4816 UnsafeMemoryAccess::create_table(16 + 4); // 16 for copyMemory; 4 for setMemory
4817 }
4818
4819 // entry points that exist in all platforms Note: This is code
4820 // that could be shared among different platforms - however the
4821 // benefit seems to be smaller than the disadvantage of having a
4822 // much more complicated generator structure. See also comment in
4823 // stubRoutines.hpp.
4824
4825 StubRoutines::_forward_exception_entry = generate_forward_exception();
4826
4827 // Generate these first because they are called from other stubs
4828 if (InlineTypeReturnedAsFields) {
4829 StubRoutines::_load_inline_type_fields_in_regs =
4830 generate_return_value_stub(CAST_FROM_FN_PTR(address, SharedRuntime::load_inline_type_fields_in_regs),
4831 "load_inline_type_fields_in_regs", false);
4832 StubRoutines::_store_inline_type_fields_to_buf =
4833 generate_return_value_stub(CAST_FROM_FN_PTR(address, SharedRuntime::store_inline_type_fields_to_buf),
4834 "store_inline_type_fields_to_buf", true);
4835 }
4836
4837 StubRoutines::_call_stub_entry =
4838 generate_call_stub(StubRoutines::_call_stub_return_address);
4839
4840 // is referenced by megamorphic call
4841 StubRoutines::_catch_exception_entry = generate_catch_exception();
4842
4843 // platform dependent
4844 StubRoutines::x86::_verify_mxcsr_entry = generate_verify_mxcsr();
4845
4846 StubRoutines::x86::_f2i_fixup = generate_f2i_fixup();
4847 StubRoutines::x86::_f2l_fixup = generate_f2l_fixup();
4848 StubRoutines::x86::_d2i_fixup = generate_d2i_fixup();
4849 StubRoutines::x86::_d2l_fixup = generate_d2l_fixup();
4850
4851 StubRoutines::x86::_float_sign_mask = generate_fp_mask(StubId::stubgen_float_sign_mask_id, 0x7FFFFFFF7FFFFFFF);
4852 StubRoutines::x86::_float_sign_flip = generate_fp_mask(StubId::stubgen_float_sign_flip_id, 0x8000000080000000);
4853 StubRoutines::x86::_double_sign_mask = generate_fp_mask(StubId::stubgen_double_sign_mask_id, 0x7FFFFFFFFFFFFFFF);
4854 StubRoutines::x86::_double_sign_flip = generate_fp_mask(StubId::stubgen_double_sign_flip_id, 0x8000000000000000);
4855
4856 if (UseCRC32Intrinsics) {
4857 StubRoutines::_updateBytesCRC32 = generate_updateBytesCRC32();
4858 }
4859
4860 if (UseCRC32CIntrinsics) {
4861 bool supports_clmul = VM_Version::supports_clmul();
4862 StubRoutines::_updateBytesCRC32C = generate_updateBytesCRC32C(supports_clmul);
4863 }
4864
4865 if (VM_Version::supports_float16()) {
4866 // For results consistency both intrinsics should be enabled.
4867 // vmIntrinsics checks InlineIntrinsics flag, no need to check it here.
4868 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_float16ToFloat) &&
4869 vmIntrinsics::is_intrinsic_available(vmIntrinsics::_floatToFloat16)) {
4870 StubRoutines::_hf2f = generate_float16ToFloat();
4871 StubRoutines::_f2hf = generate_floatToFloat16();
4872 }
4873 }
4874
4875 generate_libm_stubs();
4876
4877 StubRoutines::_fmod = generate_libmFmod(); // from stubGenerator_x86_64_fmod.cpp
4878 }
4879
4880 // Call here from the interpreter or compiled code to either load
4881 // multiple returned values from the inline type instance being
4882 // returned to registers or to store returned values to a newly
4883 // allocated inline type instance.
4884 // Register is a class, but it would be assigned numerical value.
4885 // "0" is assigned for xmm0. Thus we need to ignore -Wnonnull.
4886 PRAGMA_DIAG_PUSH
4887 PRAGMA_NONNULL_IGNORED
4888 address StubGenerator::generate_return_value_stub(address destination, const char* name, bool has_res) {
4889 // We need to save all registers the calling convention may use so
4890 // the runtime calls read or update those registers. This needs to
4891 // be in sync with SharedRuntime::java_return_convention().
4892 enum layout {
4893 pad_off = frame::arg_reg_save_area_bytes/BytesPerInt, pad_off_2,
4894 rax_off, rax_off_2,
4895 j_rarg5_off, j_rarg5_2,
4896 j_rarg4_off, j_rarg4_2,
4897 j_rarg3_off, j_rarg3_2,
4898 j_rarg2_off, j_rarg2_2,
4899 j_rarg1_off, j_rarg1_2,
4900 j_rarg0_off, j_rarg0_2,
4901 j_farg0_off, j_farg0_2,
4902 j_farg1_off, j_farg1_2,
4903 j_farg2_off, j_farg2_2,
4904 j_farg3_off, j_farg3_2,
4905 j_farg4_off, j_farg4_2,
4906 j_farg5_off, j_farg5_2,
4907 j_farg6_off, j_farg6_2,
4908 j_farg7_off, j_farg7_2,
4909 rbp_off, rbp_off_2,
4910 return_off, return_off_2,
4911
4912 framesize
4913 };
4914
4915 CodeBuffer buffer(name, 1000, 512);
4916 MacroAssembler* _masm = new MacroAssembler(&buffer);
4917
4918 int frame_size_in_bytes = align_up(framesize*BytesPerInt, 16);
4919 assert(frame_size_in_bytes == framesize*BytesPerInt, "misaligned");
4920 int frame_size_in_slots = frame_size_in_bytes / BytesPerInt;
4921 int frame_size_in_words = frame_size_in_bytes / wordSize;
4922
4923 OopMapSet *oop_maps = new OopMapSet();
4924 OopMap* map = new OopMap(frame_size_in_slots, 0);
4925
4926 map->set_callee_saved(VMRegImpl::stack2reg(rax_off), rax->as_VMReg());
4927 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg5_off), j_rarg5->as_VMReg());
4928 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg4_off), j_rarg4->as_VMReg());
4929 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg3_off), j_rarg3->as_VMReg());
4930 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg2_off), j_rarg2->as_VMReg());
4931 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg1_off), j_rarg1->as_VMReg());
4932 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg0_off), j_rarg0->as_VMReg());
4933 map->set_callee_saved(VMRegImpl::stack2reg(j_farg0_off), j_farg0->as_VMReg());
4934 map->set_callee_saved(VMRegImpl::stack2reg(j_farg1_off), j_farg1->as_VMReg());
4935 map->set_callee_saved(VMRegImpl::stack2reg(j_farg2_off), j_farg2->as_VMReg());
4936 map->set_callee_saved(VMRegImpl::stack2reg(j_farg3_off), j_farg3->as_VMReg());
4937 map->set_callee_saved(VMRegImpl::stack2reg(j_farg4_off), j_farg4->as_VMReg());
4938 map->set_callee_saved(VMRegImpl::stack2reg(j_farg5_off), j_farg5->as_VMReg());
4939 map->set_callee_saved(VMRegImpl::stack2reg(j_farg6_off), j_farg6->as_VMReg());
4940 map->set_callee_saved(VMRegImpl::stack2reg(j_farg7_off), j_farg7->as_VMReg());
4941
4942 int start = __ offset();
4943
4944 __ subptr(rsp, frame_size_in_bytes - 8 /* return address*/);
4945
4946 __ movptr(Address(rsp, rbp_off * BytesPerInt), rbp);
4947 __ movdbl(Address(rsp, j_farg7_off * BytesPerInt), j_farg7);
4948 __ movdbl(Address(rsp, j_farg6_off * BytesPerInt), j_farg6);
4949 __ movdbl(Address(rsp, j_farg5_off * BytesPerInt), j_farg5);
4950 __ movdbl(Address(rsp, j_farg4_off * BytesPerInt), j_farg4);
4951 __ movdbl(Address(rsp, j_farg3_off * BytesPerInt), j_farg3);
4952 __ movdbl(Address(rsp, j_farg2_off * BytesPerInt), j_farg2);
4953 __ movdbl(Address(rsp, j_farg1_off * BytesPerInt), j_farg1);
4954 __ movdbl(Address(rsp, j_farg0_off * BytesPerInt), j_farg0);
4955
4956 __ movptr(Address(rsp, j_rarg0_off * BytesPerInt), j_rarg0);
4957 __ movptr(Address(rsp, j_rarg1_off * BytesPerInt), j_rarg1);
4958 __ movptr(Address(rsp, j_rarg2_off * BytesPerInt), j_rarg2);
4959 __ movptr(Address(rsp, j_rarg3_off * BytesPerInt), j_rarg3);
4960 __ movptr(Address(rsp, j_rarg4_off * BytesPerInt), j_rarg4);
4961 __ movptr(Address(rsp, j_rarg5_off * BytesPerInt), j_rarg5);
4962 __ movptr(Address(rsp, rax_off * BytesPerInt), rax);
4963
4964 int frame_complete = __ offset();
4965
4966 __ set_last_Java_frame(noreg, noreg, nullptr, rscratch1);
4967
4968 __ mov(c_rarg0, r15_thread);
4969 __ mov(c_rarg1, rax);
4970
4971 __ call(RuntimeAddress(destination));
4972
4973 // Set an oopmap for the call site.
4974
4975 oop_maps->add_gc_map( __ offset() - start, map);
4976
4977 // clear last_Java_sp
4978 __ reset_last_Java_frame(false);
4979
4980 __ movptr(rbp, Address(rsp, rbp_off * BytesPerInt));
4981 __ movdbl(j_farg7, Address(rsp, j_farg7_off * BytesPerInt));
4982 __ movdbl(j_farg6, Address(rsp, j_farg6_off * BytesPerInt));
4983 __ movdbl(j_farg5, Address(rsp, j_farg5_off * BytesPerInt));
4984 __ movdbl(j_farg4, Address(rsp, j_farg4_off * BytesPerInt));
4985 __ movdbl(j_farg3, Address(rsp, j_farg3_off * BytesPerInt));
4986 __ movdbl(j_farg2, Address(rsp, j_farg2_off * BytesPerInt));
4987 __ movdbl(j_farg1, Address(rsp, j_farg1_off * BytesPerInt));
4988 __ movdbl(j_farg0, Address(rsp, j_farg0_off * BytesPerInt));
4989
4990 __ movptr(j_rarg0, Address(rsp, j_rarg0_off * BytesPerInt));
4991 __ movptr(j_rarg1, Address(rsp, j_rarg1_off * BytesPerInt));
4992 __ movptr(j_rarg2, Address(rsp, j_rarg2_off * BytesPerInt));
4993 __ movptr(j_rarg3, Address(rsp, j_rarg3_off * BytesPerInt));
4994 __ movptr(j_rarg4, Address(rsp, j_rarg4_off * BytesPerInt));
4995 __ movptr(j_rarg5, Address(rsp, j_rarg5_off * BytesPerInt));
4996 __ movptr(rax, Address(rsp, rax_off * BytesPerInt));
4997
4998 __ addptr(rsp, frame_size_in_bytes-8);
4999
5000 // check for pending exceptions
5001 Label pending;
5002 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
5003 __ jcc(Assembler::notEqual, pending);
5004
5005 if (has_res) {
5006 // We just called SharedRuntime::store_inline_type_fields_to_buf. Check if we still
5007 // need to initialize the buffer and if so, call the inline class specific pack handler.
5008 Label skip_pack;
5009 __ get_vm_result_oop(rax);
5010 __ get_vm_result_metadata(rscratch1);
5011 __ testptr(rscratch1, rscratch1);
5012 __ jcc(Assembler::zero, skip_pack);
5013 __ movptr(rscratch1, Address(rscratch1, InlineKlass::adr_members_offset()));
5014 __ movptr(rscratch1, Address(rscratch1, InlineKlass::pack_handler_offset()));
5015 __ call(rscratch1);
5016 __ membar(Assembler::StoreStore);
5017 __ bind(skip_pack);
5018 }
5019
5020 __ ret(0);
5021
5022 __ bind(pending);
5023
5024 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset()));
5025 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
5026
5027 // -------------
5028 // make sure all code is generated
5029 _masm->flush();
5030
5031 RuntimeStub* stub = RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_in_words, oop_maps, false);
5032 return stub->entry_point();
5033 }
5034
5035 void StubGenerator::generate_continuation_stubs() {
5036 // Continuation stubs:
5037 StubRoutines::_cont_thaw = generate_cont_thaw();
5038 StubRoutines::_cont_returnBarrier = generate_cont_returnBarrier();
5039 StubRoutines::_cont_returnBarrierExc = generate_cont_returnBarrier_exception();
5040 StubRoutines::_cont_preempt_stub = generate_cont_preempt_stub();
5041 }
5042
5043 void StubGenerator::generate_final_stubs() {
5044 // Generates the rest of stubs and initializes the entry points
5045
5046 // support for verify_oop (must happen after universe_init)
5047 if (VerifyOops) {
5048 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop();
5049 }
5050
5051 // arraycopy stubs used by compilers
5052 generate_arraycopy_stubs();
5053
5054 StubRoutines::_method_entry_barrier = generate_method_entry_barrier();
5055
5056 #ifdef COMPILER2
5057 if (UseSecondarySupersTable) {
5058 StubRoutines::_lookup_secondary_supers_table_slow_path_stub = generate_lookup_secondary_supers_table_slow_path_stub();
5059 if (! InlineSecondarySupersTest) {
5060 generate_lookup_secondary_supers_table_stub();
5061 }
5062 }
5063 #endif // COMPILER2
5064
5065 if (UseVectorizedMismatchIntrinsic) {
5066 StubRoutines::_vectorizedMismatch = generate_vectorizedMismatch();
5067 }
5068
5069 StubRoutines::_upcall_stub_exception_handler = generate_upcall_stub_exception_handler();
5070 StubRoutines::_upcall_stub_load_target = generate_upcall_stub_load_target();
5071 }
5072
5073 void StubGenerator::generate_compiler_stubs() {
5074 #if COMPILER2_OR_JVMCI
5075
5076 // Entry points that are C2 compiler specific.
5077
5078 StubRoutines::x86::_vector_float_sign_mask = generate_vector_mask(StubId::stubgen_vector_float_sign_mask_id, 0x7FFFFFFF7FFFFFFF);
5079 StubRoutines::x86::_vector_float_sign_flip = generate_vector_mask(StubId::stubgen_vector_float_sign_flip_id, 0x8000000080000000);
5080 StubRoutines::x86::_vector_double_sign_mask = generate_vector_mask(StubId::stubgen_vector_double_sign_mask_id, 0x7FFFFFFFFFFFFFFF);
5081 StubRoutines::x86::_vector_double_sign_flip = generate_vector_mask(StubId::stubgen_vector_double_sign_flip_id, 0x8000000000000000);
5082 StubRoutines::x86::_vector_all_bits_set = generate_vector_mask(StubId::stubgen_vector_all_bits_set_id, 0xFFFFFFFFFFFFFFFF);
5083 StubRoutines::x86::_vector_int_mask_cmp_bits = generate_vector_mask(StubId::stubgen_vector_int_mask_cmp_bits_id, 0x0000000100000001);
5084 StubRoutines::x86::_vector_short_to_byte_mask = generate_vector_mask(StubId::stubgen_vector_short_to_byte_mask_id, 0x00ff00ff00ff00ff);
5085 StubRoutines::x86::_vector_byte_perm_mask = generate_vector_byte_perm_mask();
5086 StubRoutines::x86::_vector_int_to_byte_mask = generate_vector_mask(StubId::stubgen_vector_int_to_byte_mask_id, 0x000000ff000000ff);
5087 StubRoutines::x86::_vector_int_to_short_mask = generate_vector_mask(StubId::stubgen_vector_int_to_short_mask_id, 0x0000ffff0000ffff);
5088 StubRoutines::x86::_vector_32_bit_mask = generate_vector_custom_i32(StubId::stubgen_vector_32_bit_mask_id, Assembler::AVX_512bit,
5089 0xFFFFFFFF, 0, 0, 0);
5090 StubRoutines::x86::_vector_64_bit_mask = generate_vector_custom_i32(StubId::stubgen_vector_64_bit_mask_id, Assembler::AVX_512bit,
5091 0xFFFFFFFF, 0xFFFFFFFF, 0, 0);
5092 StubRoutines::x86::_vector_int_shuffle_mask = generate_vector_mask(StubId::stubgen_vector_int_shuffle_mask_id, 0x0302010003020100);
5093 StubRoutines::x86::_vector_byte_shuffle_mask = generate_vector_byte_shuffle_mask();
5094 StubRoutines::x86::_vector_short_shuffle_mask = generate_vector_mask(StubId::stubgen_vector_short_shuffle_mask_id, 0x0100010001000100);
5095 StubRoutines::x86::_vector_long_shuffle_mask = generate_vector_mask(StubId::stubgen_vector_long_shuffle_mask_id, 0x0000000100000000);
5096 StubRoutines::x86::_vector_long_sign_mask = generate_vector_mask(StubId::stubgen_vector_long_sign_mask_id, 0x8000000000000000);
5097 generate_iota_indices();
5098 StubRoutines::x86::_vector_count_leading_zeros_lut = generate_count_leading_zeros_lut();
5099 StubRoutines::x86::_vector_reverse_bit_lut = generate_vector_reverse_bit_lut();
5100 StubRoutines::x86::_vector_reverse_byte_perm_mask_long = generate_vector_reverse_byte_perm_mask_long();
5101 StubRoutines::x86::_vector_reverse_byte_perm_mask_int = generate_vector_reverse_byte_perm_mask_int();
5102 StubRoutines::x86::_vector_reverse_byte_perm_mask_short = generate_vector_reverse_byte_perm_mask_short();
5103
5104 if (VM_Version::supports_avx2() && !VM_Version::supports_avx512vl()) {
5105 StubRoutines::x86::_compress_perm_table32 = generate_compress_perm_table(StubId::stubgen_compress_perm_table32_id);
5106 StubRoutines::x86::_compress_perm_table64 = generate_compress_perm_table(StubId::stubgen_compress_perm_table64_id);
5107 StubRoutines::x86::_expand_perm_table32 = generate_expand_perm_table(StubId::stubgen_expand_perm_table32_id);
5108 StubRoutines::x86::_expand_perm_table64 = generate_expand_perm_table(StubId::stubgen_expand_perm_table64_id);
5109 }
5110
5111 if (VM_Version::supports_avx2() && !VM_Version::supports_avx512_vpopcntdq()) {
5112 // lut implementation influenced by counting 1s algorithm from section 5-1 of Hackers' Delight.
5113 StubRoutines::x86::_vector_popcount_lut = generate_popcount_avx_lut();
5114 }
5115
5116 generate_aes_stubs();
5117
5118 generate_ghash_stubs();
5119
5120 generate_chacha_stubs();
5121
5122 generate_kyber_stubs();
5123
5124 generate_dilithium_stubs();
5125
5126 generate_sha3_stubs();
5127
5128 // data cache line writeback
5129 StubRoutines::_data_cache_writeback = generate_data_cache_writeback();
5130 StubRoutines::_data_cache_writeback_sync = generate_data_cache_writeback_sync();
5131
5132 #ifdef COMPILER2
5133 if ((UseAVX == 2) && EnableX86ECoreOpts && UseCountTrailingZerosInstruction) {
5134 generate_string_indexof(StubRoutines::_string_indexof_array);
5135 }
5136 #endif
5137
5138 if (UseAdler32Intrinsics) {
5139 StubRoutines::_updateBytesAdler32 = generate_updateBytesAdler32();
5140 }
5141
5142 if (UsePoly1305Intrinsics) {
5143 StubRoutines::_poly1305_processBlocks = generate_poly1305_processBlocks();
5144 }
5145
5146 if (UseIntPolyIntrinsics) {
5147 StubRoutines::_intpoly_montgomeryMult_P256 = generate_intpoly_montgomeryMult_P256();
5148 StubRoutines::_intpoly_assign = generate_intpoly_assign();
5149 }
5150
5151 if (UseMD5Intrinsics) {
5152 StubRoutines::_md5_implCompress = generate_md5_implCompress(StubId::stubgen_md5_implCompress_id);
5153 StubRoutines::_md5_implCompressMB = generate_md5_implCompress(StubId::stubgen_md5_implCompressMB_id);
5154 }
5155
5156 if (UseSHA1Intrinsics) {
5157 StubRoutines::x86::_upper_word_mask_addr = generate_upper_word_mask();
5158 StubRoutines::x86::_shuffle_byte_flip_mask_addr = generate_shuffle_byte_flip_mask();
5159 StubRoutines::_sha1_implCompress = generate_sha1_implCompress(StubId::stubgen_sha1_implCompress_id);
5160 StubRoutines::_sha1_implCompressMB = generate_sha1_implCompress(StubId::stubgen_sha1_implCompressMB_id);
5161 }
5162
5163 if (UseSHA256Intrinsics) {
5164 address entry2 = nullptr;
5165 address entry3 = nullptr;
5166 StubRoutines::x86::_k256_adr = (address)StubRoutines::x86::_k256;
5167 char* dst = (char*)StubRoutines::x86::_k256_W;
5168 char* src = (char*)StubRoutines::x86::_k256;
5169 for (int ii = 0; ii < 16; ++ii) {
5170 memcpy(dst + 32 * ii, src + 16 * ii, 16);
5171 memcpy(dst + 32 * ii + 16, src + 16 * ii, 16);
5172 }
5173 StubRoutines::x86::_k256_W_adr = (address)StubRoutines::x86::_k256_W;
5174 StubRoutines::x86::_pshuffle_byte_flip_mask_addr = generate_pshuffle_byte_flip_mask(entry2, entry3);
5175 StubRoutines::x86::_pshuffle_byte_flip_mask_00ba_addr = entry2;
5176 StubRoutines::x86::_pshuffle_byte_flip_mask_dc00_addr = entry3;
5177 StubRoutines::_sha256_implCompress = generate_sha256_implCompress(StubId::stubgen_sha256_implCompress_id);
5178 StubRoutines::_sha256_implCompressMB = generate_sha256_implCompress(StubId::stubgen_sha256_implCompressMB_id);
5179 }
5180
5181 if (UseSHA512Intrinsics) {
5182 address entry2 = nullptr;
5183 StubRoutines::x86::_k512_W_addr = (address)StubRoutines::x86::_k512_W;
5184 StubRoutines::x86::_pshuffle_byte_flip_mask_addr_sha512 = generate_pshuffle_byte_flip_mask_sha512(entry2);
5185 StubRoutines::x86::_pshuffle_byte_flip_mask_ymm_lo_addr_sha512 = entry2;
5186 StubRoutines::_sha512_implCompress = generate_sha512_implCompress(StubId::stubgen_sha512_implCompress_id);
5187 StubRoutines::_sha512_implCompressMB = generate_sha512_implCompress(StubId::stubgen_sha512_implCompressMB_id);
5188 }
5189
5190 if (UseBASE64Intrinsics) {
5191 if(VM_Version::supports_avx2()) {
5192 StubRoutines::x86::_avx2_shuffle_base64 = base64_avx2_shuffle_addr();
5193 StubRoutines::x86::_avx2_input_mask_base64 = base64_avx2_input_mask_addr();
5194 StubRoutines::x86::_avx2_lut_base64 = base64_avx2_lut_addr();
5195 StubRoutines::x86::_avx2_decode_tables_base64 = base64_AVX2_decode_tables_addr();
5196 StubRoutines::x86::_avx2_decode_lut_tables_base64 = base64_AVX2_decode_LUT_tables_addr();
5197 }
5198 StubRoutines::x86::_encoding_table_base64 = base64_encoding_table_addr();
5199 if (VM_Version::supports_avx512_vbmi()) {
5200 StubRoutines::x86::_shuffle_base64 = base64_shuffle_addr();
5201 StubRoutines::x86::_lookup_lo_base64 = base64_vbmi_lookup_lo_addr();
5202 StubRoutines::x86::_lookup_hi_base64 = base64_vbmi_lookup_hi_addr();
5203 StubRoutines::x86::_lookup_lo_base64url = base64_vbmi_lookup_lo_url_addr();
5204 StubRoutines::x86::_lookup_hi_base64url = base64_vbmi_lookup_hi_url_addr();
5205 StubRoutines::x86::_pack_vec_base64 = base64_vbmi_pack_vec_addr();
5206 StubRoutines::x86::_join_0_1_base64 = base64_vbmi_join_0_1_addr();
5207 StubRoutines::x86::_join_1_2_base64 = base64_vbmi_join_1_2_addr();
5208 StubRoutines::x86::_join_2_3_base64 = base64_vbmi_join_2_3_addr();
5209 }
5210 StubRoutines::x86::_decoding_table_base64 = base64_decoding_table_addr();
5211 StubRoutines::_base64_encodeBlock = generate_base64_encodeBlock();
5212 StubRoutines::_base64_decodeBlock = generate_base64_decodeBlock();
5213 }
5214
5215 #ifdef COMPILER2
5216 if (UseMultiplyToLenIntrinsic) {
5217 StubRoutines::_multiplyToLen = generate_multiplyToLen();
5218 }
5219 if (UseSquareToLenIntrinsic) {
5220 StubRoutines::_squareToLen = generate_squareToLen();
5221 }
5222 if (UseMulAddIntrinsic) {
5223 StubRoutines::_mulAdd = generate_mulAdd();
5224 }
5225 if (VM_Version::supports_avx512_vbmi2()) {
5226 StubRoutines::_bigIntegerRightShiftWorker = generate_bigIntegerRightShift();
5227 StubRoutines::_bigIntegerLeftShiftWorker = generate_bigIntegerLeftShift();
5228 }
5229 if (UseMontgomeryMultiplyIntrinsic) {
5230 StubRoutines::_montgomeryMultiply
5231 = CAST_FROM_FN_PTR(address, SharedRuntime::montgomery_multiply);
5232 }
5233 if (UseMontgomerySquareIntrinsic) {
5234 StubRoutines::_montgomerySquare
5235 = CAST_FROM_FN_PTR(address, SharedRuntime::montgomery_square);
5236 }
5237
5238 // Load x86_64_sort library on supported hardware to enable SIMD sort and partition intrinsics
5239
5240 if (VM_Version::supports_avx512dq() || VM_Version::supports_avx2()) {
5241 void *libsimdsort = nullptr;
5242 char ebuf_[1024];
5243 char dll_name_simd_sort[JVM_MAXPATHLEN];
5244 if (os::dll_locate_lib(dll_name_simd_sort, sizeof(dll_name_simd_sort), Arguments::get_dll_dir(), "simdsort")) {
5245 libsimdsort = os::dll_load(dll_name_simd_sort, ebuf_, sizeof ebuf_);
5246 }
5247 // Get addresses for SIMD sort and partition routines
5248 if (libsimdsort != nullptr) {
5249 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, JNI_LIB_PREFIX "simdsort" JNI_LIB_SUFFIX, p2i(libsimdsort));
5250
5251 os::snprintf_checked(ebuf_, sizeof(ebuf_), VM_Version::supports_avx512_simd_sort() ? "avx512_sort" : "avx2_sort");
5252 StubRoutines::_array_sort = (address)os::dll_lookup(libsimdsort, ebuf_);
5253
5254 os::snprintf_checked(ebuf_, sizeof(ebuf_), VM_Version::supports_avx512_simd_sort() ? "avx512_partition" : "avx2_partition");
5255 StubRoutines::_array_partition = (address)os::dll_lookup(libsimdsort, ebuf_);
5256 }
5257 }
5258
5259 #endif // COMPILER2
5260 #endif // COMPILER2_OR_JVMCI
5261 }
5262
5263 StubGenerator::StubGenerator(CodeBuffer* code, BlobId blob_id, AOTStubData* stub_data) : StubCodeGenerator(code, blob_id, stub_data) {
5264 switch(blob_id) {
5265 case BlobId::stubgen_preuniverse_id:
5266 generate_preuniverse_stubs();
5267 break;
5268 case BlobId::stubgen_initial_id:
5269 generate_initial_stubs();
5270 break;
5271 case BlobId::stubgen_continuation_id:
5272 generate_continuation_stubs();
5273 break;
5274 case BlobId::stubgen_compiler_id:
5275 generate_compiler_stubs();
5276 break;
5277 case BlobId::stubgen_final_id:
5278 generate_final_stubs();
5279 break;
5280 default:
5281 fatal("unexpected blob id: %s", StubInfo::name(blob_id));
5282 break;
5283 };
5284 }
5285
5286 #if INCLUDE_CDS
5287 // publish addresses of static data defined in this file and in other
5288 // stubgen stub generator files
5289 void StubGenerator::init_AOTAddressTable(GrowableArray<address>& external_addresses) {
5290 init_AOTAddressTable_adler(external_addresses);
5291 init_AOTAddressTable_aes(external_addresses);
5292 init_AOTAddressTable_cbrt(external_addresses);
5293 init_AOTAddressTable_chacha(external_addresses);
5294 // constants publishes for all of address use by cos and almost all of sin
5295 init_AOTAddressTable_constants(external_addresses);
5296 init_AOTAddressTable_dilithium(external_addresses);
5297 init_AOTAddressTable_exp(external_addresses);
5298 init_AOTAddressTable_fmod(external_addresses);
5299 init_AOTAddressTable_ghash(external_addresses);
5300 init_AOTAddressTable_kyber(external_addresses);
5301 init_AOTAddressTable_log(external_addresses);
5302 init_AOTAddressTable_poly1305(external_addresses);
5303 init_AOTAddressTable_poly_mont(external_addresses);
5304 init_AOTAddressTable_pow(external_addresses);
5305 init_AOTAddressTable_sha3(external_addresses);
5306 init_AOTAddressTable_sin(external_addresses);
5307 init_AOTAddressTable_sinh(external_addresses);
5308 init_AOTAddressTable_tan(external_addresses);
5309 init_AOTAddressTable_tanh(external_addresses);
5310 }
5311 #endif // INCLUDE_CDS
5312
5313 void StubGenerator_generate(CodeBuffer* code, BlobId blob_id, AOTStubData* stub_data) {
5314 StubGenerator g(code, blob_id, stub_data);
5315 }
5316
5317 #undef __