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