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