1 /*
2 * Copyright (c) 2003, 2024, 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 "precompiled.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/javaThread.hpp"
39 #include "runtime/sharedRuntime.hpp"
40 #include "runtime/stubRoutines.hpp"
41 #include "stubGenerator_x86_64.hpp"
42 #ifdef COMPILER2
43 #include "opto/runtime.hpp"
44 #include "opto/c2_globals.hpp"
45 #endif
46 #if INCLUDE_JVMCI
47 #include "jvmci/jvmci_globals.hpp"
48 #endif
49
50 // For a more detailed description of the stub routine structure
51 // see the comment in stubRoutines.hpp
52
53 #define __ _masm->
54 #define TIMES_OOP (UseCompressedOops ? Address::times_4 : Address::times_8)
55
56 #ifdef PRODUCT
57 #define BLOCK_COMMENT(str) /* nothing */
58 #else
59 #define BLOCK_COMMENT(str) __ block_comment(str)
60 #endif // PRODUCT
61
62 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
63
64 //
65 // Linux Arguments:
66 // c_rarg0: call wrapper address address
67 // c_rarg1: result address
68 // c_rarg2: result type BasicType
69 // c_rarg3: method Method*
70 // c_rarg4: (interpreter) entry point address
71 // c_rarg5: parameters intptr_t*
72 // 16(rbp): parameter size (in words) int
73 // 24(rbp): thread Thread*
74 //
75 // [ return_from_Java ] <--- rsp
76 // [ argument word n ]
77 // ...
78 // -12 [ argument word 1 ]
79 // -11 [ saved r15 ] <--- rsp_after_call
80 // -10 [ saved r14 ]
81 // -9 [ saved r13 ]
82 // -8 [ saved r12 ]
83 // -7 [ saved rbx ]
84 // -6 [ call wrapper ]
85 // -5 [ result ]
86 // -4 [ result type ]
87 // -3 [ method ]
88 // -2 [ entry point ]
89 // -1 [ parameters ]
90 // 0 [ saved rbp ] <--- rbp
91 // 1 [ return address ]
92 // 2 [ parameter size ]
93 // 3 [ thread ]
94 //
95 // Windows Arguments:
96 // c_rarg0: call wrapper address address
97 // c_rarg1: result address
98 // c_rarg2: result type BasicType
99 // c_rarg3: method Method*
100 // 48(rbp): (interpreter) entry point address
101 // 56(rbp): parameters intptr_t*
102 // 64(rbp): parameter size (in words) int
103 // 72(rbp): thread Thread*
104 //
105 // [ return_from_Java ] <--- rsp
106 // [ argument word n ]
107 // ...
108 // -28 [ argument word 1 ]
109 // -27 [ saved xmm15 ] <--- rsp after_call
110 // [ saved xmm7-xmm14 ]
111 // -9 [ saved xmm6 ] (each xmm register takes 2 slots)
112 // -7 [ saved r15 ]
113 // -6 [ saved r14 ]
114 // -5 [ saved r13 ]
115 // -4 [ saved r12 ]
116 // -3 [ saved rdi ]
117 // -2 [ saved rsi ]
118 // -1 [ saved rbx ]
119 // 0 [ saved rbp ] <--- rbp
120 // 1 [ return address ]
121 // 2 [ call wrapper ]
122 // 3 [ result ]
123 // 4 [ result type ]
124 // 5 [ method ]
125 // 6 [ entry point ]
126 // 7 [ parameters ]
127 // 8 [ parameter size ]
128 // 9 [ thread ]
129 //
130 // Windows reserves the callers stack space for arguments 1-4.
131 // We spill c_rarg0-c_rarg3 to this space.
132
133 // Call stub stack layout word offsets from rbp
134 #ifdef _WIN64
135 enum call_stub_layout {
136 xmm_save_first = 6, // save from xmm6
137 xmm_save_last = 15, // to xmm15
138 xmm_save_base = -9,
139 rsp_after_call_off = xmm_save_base - 2 * (xmm_save_last - xmm_save_first), // -27
140 r15_off = -7,
141 r14_off = -6,
142 r13_off = -5,
143 r12_off = -4,
144 rdi_off = -3,
145 rsi_off = -2,
146 rbx_off = -1,
147 rbp_off = 0,
148 retaddr_off = 1,
149 call_wrapper_off = 2,
150 result_off = 3,
151 result_type_off = 4,
152 method_off = 5,
153 entry_point_off = 6,
154 parameters_off = 7,
155 parameter_size_off = 8,
156 thread_off = 9
157 };
158
159 static Address xmm_save(int reg) {
160 assert(reg >= xmm_save_first && reg <= xmm_save_last, "XMM register number out of range");
161 return Address(rbp, (xmm_save_base - (reg - xmm_save_first) * 2) * wordSize);
162 }
163 #else // !_WIN64
164 enum call_stub_layout {
165 rsp_after_call_off = -12,
166 mxcsr_off = rsp_after_call_off,
167 r15_off = -11,
168 r14_off = -10,
169 r13_off = -9,
170 r12_off = -8,
171 rbx_off = -7,
172 call_wrapper_off = -6,
173 result_off = -5,
174 result_type_off = -4,
175 method_off = -3,
176 entry_point_off = -2,
177 parameters_off = -1,
178 rbp_off = 0,
179 retaddr_off = 1,
180 parameter_size_off = 2,
181 thread_off = 3
182 };
183 #endif // _WIN64
184
185 address StubGenerator::generate_call_stub(address& return_address) {
186
187 assert((int)frame::entry_frame_after_call_words == -(int)rsp_after_call_off + 1 &&
188 (int)frame::entry_frame_call_wrapper_offset == (int)call_wrapper_off,
189 "adjust this code");
190 StubCodeMark mark(this, "StubRoutines", "call_stub");
191 address start = __ pc();
192
193 // same as in generate_catch_exception()!
194 const Address rsp_after_call(rbp, rsp_after_call_off * wordSize);
195
196 const Address call_wrapper (rbp, call_wrapper_off * wordSize);
197 const Address result (rbp, result_off * wordSize);
198 const Address result_type (rbp, result_type_off * wordSize);
199 const Address method (rbp, method_off * wordSize);
200 const Address entry_point (rbp, entry_point_off * wordSize);
201 const Address parameters (rbp, parameters_off * wordSize);
202 const Address parameter_size(rbp, parameter_size_off * wordSize);
203
204 // same as in generate_catch_exception()!
205 const Address thread (rbp, thread_off * wordSize);
206
207 const Address r15_save(rbp, r15_off * wordSize);
208 const Address r14_save(rbp, r14_off * wordSize);
209 const Address r13_save(rbp, r13_off * wordSize);
210 const Address r12_save(rbp, r12_off * wordSize);
211 const Address rbx_save(rbp, rbx_off * wordSize);
212
213 // stub code
214 __ enter();
215 __ subptr(rsp, -rsp_after_call_off * wordSize);
216
217 // save register parameters
218 #ifndef _WIN64
219 __ movptr(parameters, c_rarg5); // parameters
220 __ movptr(entry_point, c_rarg4); // entry_point
221 #endif
222
223 __ movptr(method, c_rarg3); // method
224 __ movl(result_type, c_rarg2); // result type
225 __ movptr(result, c_rarg1); // result
226 __ movptr(call_wrapper, c_rarg0); // call wrapper
227
228 // save regs belonging to calling function
229 __ movptr(rbx_save, rbx);
230 __ movptr(r12_save, r12);
231 __ movptr(r13_save, r13);
232 __ movptr(r14_save, r14);
233 __ movptr(r15_save, r15);
234
235 #ifdef _WIN64
236 int last_reg = 15;
237 for (int i = xmm_save_first; i <= last_reg; i++) {
238 __ movdqu(xmm_save(i), as_XMMRegister(i));
239 }
240
241 const Address rdi_save(rbp, rdi_off * wordSize);
242 const Address rsi_save(rbp, rsi_off * wordSize);
243
244 __ movptr(rsi_save, rsi);
245 __ movptr(rdi_save, rdi);
246 #else
247 const Address mxcsr_save(rbp, mxcsr_off * wordSize);
248 {
249 Label skip_ldmx;
250 __ stmxcsr(mxcsr_save);
251 __ movl(rax, mxcsr_save);
252 __ andl(rax, 0xFFC0); // Mask out any pending exceptions (only check control and mask bits)
253 ExternalAddress mxcsr_std(StubRoutines::x86::addr_mxcsr_std());
254 __ cmp32(rax, mxcsr_std, rscratch1);
255 __ jcc(Assembler::equal, skip_ldmx);
256 __ ldmxcsr(mxcsr_std, rscratch1);
257 __ bind(skip_ldmx);
258 }
259 #endif
260
261 // Load up thread register
262 __ movptr(r15_thread, thread);
263 __ reinit_heapbase();
264
265 #ifdef ASSERT
266 // make sure we have no pending exceptions
267 {
268 Label L;
269 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
270 __ jcc(Assembler::equal, L);
271 __ stop("StubRoutines::call_stub: entered with pending exception");
272 __ bind(L);
273 }
274 #endif
275
276 // pass parameters if any
277 BLOCK_COMMENT("pass parameters if any");
278 Label parameters_done;
279 __ movl(c_rarg3, parameter_size);
280 __ testl(c_rarg3, c_rarg3);
281 __ jcc(Assembler::zero, parameters_done);
282
283 Label loop;
284 __ movptr(c_rarg2, parameters); // parameter pointer
285 __ movl(c_rarg1, c_rarg3); // parameter counter is in c_rarg1
286 __ BIND(loop);
287 __ movptr(rax, Address(c_rarg2, 0));// get parameter
288 __ addptr(c_rarg2, wordSize); // advance to next parameter
289 __ decrementl(c_rarg1); // decrement counter
290 __ push(rax); // pass parameter
291 __ jcc(Assembler::notZero, loop);
292
293 // call Java function
294 __ BIND(parameters_done);
295 __ movptr(rbx, method); // get Method*
296 __ movptr(c_rarg1, entry_point); // get entry_point
297 __ mov(r13, rsp); // set sender sp
298 BLOCK_COMMENT("call Java function");
299 __ call(c_rarg1);
300
301 BLOCK_COMMENT("call_stub_return_address:");
302 return_address = __ pc();
303
304 // store result depending on type (everything that is not
305 // T_OBJECT, T_LONG, T_FLOAT or T_DOUBLE is treated as T_INT)
306 __ movptr(c_rarg0, result);
307 Label is_long, is_float, is_double, exit;
308 __ movl(c_rarg1, result_type);
309 __ cmpl(c_rarg1, T_OBJECT);
310 __ jcc(Assembler::equal, is_long);
311 __ cmpl(c_rarg1, T_LONG);
312 __ jcc(Assembler::equal, is_long);
313 __ cmpl(c_rarg1, T_FLOAT);
314 __ jcc(Assembler::equal, is_float);
315 __ cmpl(c_rarg1, T_DOUBLE);
316 __ jcc(Assembler::equal, is_double);
317 #ifdef ASSERT
318 // make sure the type is INT
319 {
320 Label L;
321 __ cmpl(c_rarg1, T_INT);
322 __ jcc(Assembler::equal, L);
323 __ stop("StubRoutines::call_stub: unexpected result type");
324 __ bind(L);
325 }
326 #endif
327
328 // handle T_INT case
329 __ movl(Address(c_rarg0, 0), rax);
330
331 __ BIND(exit);
332
333 // pop parameters
334 __ lea(rsp, rsp_after_call);
335
336 #ifdef ASSERT
337 // verify that threads correspond
338 {
339 Label L1, L2, L3;
340 __ cmpptr(r15_thread, thread);
341 __ jcc(Assembler::equal, L1);
342 __ stop("StubRoutines::call_stub: r15_thread is corrupted");
343 __ bind(L1);
344 __ get_thread(rbx);
345 __ cmpptr(r15_thread, thread);
346 __ jcc(Assembler::equal, L2);
347 __ stop("StubRoutines::call_stub: r15_thread is modified by call");
348 __ bind(L2);
349 __ cmpptr(r15_thread, rbx);
350 __ jcc(Assembler::equal, L3);
351 __ stop("StubRoutines::call_stub: threads must correspond");
352 __ bind(L3);
353 }
354 #endif
355
356 __ pop_cont_fastpath();
357
358 // restore regs belonging to calling function
359 #ifdef _WIN64
360 // emit the restores for xmm regs
361 for (int i = xmm_save_first; i <= last_reg; i++) {
362 __ movdqu(as_XMMRegister(i), xmm_save(i));
363 }
364 #endif
365 __ movptr(r15, r15_save);
366 __ movptr(r14, r14_save);
367 __ movptr(r13, r13_save);
368 __ movptr(r12, r12_save);
369 __ movptr(rbx, rbx_save);
370
371 #ifdef _WIN64
372 __ movptr(rdi, rdi_save);
373 __ movptr(rsi, rsi_save);
374 #else
375 __ ldmxcsr(mxcsr_save);
376 #endif
377
378 // restore rsp
379 __ addptr(rsp, -rsp_after_call_off * wordSize);
380
381 // return
382 __ vzeroupper();
383 __ pop(rbp);
384 __ ret(0);
385
386 // handle return types different from T_INT
387 __ BIND(is_long);
388 __ movq(Address(c_rarg0, 0), rax);
389 __ jmp(exit);
390
391 __ BIND(is_float);
392 __ movflt(Address(c_rarg0, 0), xmm0);
393 __ jmp(exit);
394
395 __ BIND(is_double);
396 __ movdbl(Address(c_rarg0, 0), xmm0);
397 __ jmp(exit);
398
399 return start;
400 }
401
402 // Return point for a Java call if there's an exception thrown in
403 // Java code. The exception is caught and transformed into a
404 // pending exception stored in JavaThread that can be tested from
405 // within the VM.
406 //
407 // Note: Usually the parameters are removed by the callee. In case
408 // of an exception crossing an activation frame boundary, that is
409 // not the case if the callee is compiled code => need to setup the
410 // rsp.
411 //
412 // rax: exception oop
413
414 address StubGenerator::generate_catch_exception() {
415 StubCodeMark mark(this, "StubRoutines", "catch_exception");
416 address start = __ pc();
417
418 // same as in generate_call_stub():
419 const Address rsp_after_call(rbp, rsp_after_call_off * wordSize);
420 const Address thread (rbp, thread_off * wordSize);
421
422 #ifdef ASSERT
423 // verify that threads correspond
424 {
425 Label L1, L2, L3;
426 __ cmpptr(r15_thread, thread);
427 __ jcc(Assembler::equal, L1);
428 __ stop("StubRoutines::catch_exception: r15_thread is corrupted");
429 __ bind(L1);
430 __ get_thread(rbx);
431 __ cmpptr(r15_thread, thread);
432 __ jcc(Assembler::equal, L2);
433 __ stop("StubRoutines::catch_exception: r15_thread is modified by call");
434 __ bind(L2);
435 __ cmpptr(r15_thread, rbx);
436 __ jcc(Assembler::equal, L3);
437 __ stop("StubRoutines::catch_exception: threads must correspond");
438 __ bind(L3);
439 }
440 #endif
441
442 // set pending exception
443 __ verify_oop(rax);
444
445 __ movptr(Address(r15_thread, Thread::pending_exception_offset()), rax);
446 __ lea(rscratch1, ExternalAddress((address)__FILE__));
447 __ movptr(Address(r15_thread, Thread::exception_file_offset()), rscratch1);
448 __ movl(Address(r15_thread, Thread::exception_line_offset()), (int) __LINE__);
449
450 // complete return to VM
451 assert(StubRoutines::_call_stub_return_address != nullptr,
452 "_call_stub_return_address must have been generated before");
453 __ jump(RuntimeAddress(StubRoutines::_call_stub_return_address));
454
455 return start;
456 }
457
458 // Continuation point for runtime calls returning with a pending
459 // exception. The pending exception check happened in the runtime
460 // or native call stub. The pending exception in Thread is
461 // converted into a Java-level exception.
462 //
463 // Contract with Java-level exception handlers:
464 // rax: exception
465 // rdx: throwing pc
466 //
467 // NOTE: At entry of this stub, exception-pc must be on stack !!
468
469 address StubGenerator::generate_forward_exception() {
470 StubCodeMark mark(this, "StubRoutines", "forward exception");
471 address start = __ pc();
472
473 // Upon entry, the sp points to the return address returning into
474 // Java (interpreted or compiled) code; i.e., the return address
475 // becomes the throwing pc.
476 //
477 // Arguments pushed before the runtime call are still on the stack
478 // but the exception handler will reset the stack pointer ->
479 // ignore them. A potential result in registers can be ignored as
480 // well.
481
482 #ifdef ASSERT
483 // make sure this code is only executed if there is a pending exception
484 {
485 Label L;
486 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
487 __ jcc(Assembler::notEqual, L);
488 __ stop("StubRoutines::forward exception: no pending exception (1)");
489 __ bind(L);
490 }
491 #endif
492
493 // compute exception handler into rbx
494 __ movptr(c_rarg0, Address(rsp, 0));
495 BLOCK_COMMENT("call exception_handler_for_return_address");
496 __ call_VM_leaf(CAST_FROM_FN_PTR(address,
497 SharedRuntime::exception_handler_for_return_address),
498 r15_thread, c_rarg0);
499 __ mov(rbx, rax);
500
501 // setup rax & rdx, remove return address & clear pending exception
502 __ pop(rdx);
503 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset()));
504 __ movptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
505
506 #ifdef ASSERT
507 // make sure exception is set
508 {
509 Label L;
510 __ testptr(rax, rax);
511 __ jcc(Assembler::notEqual, L);
512 __ stop("StubRoutines::forward exception: no pending exception (2)");
513 __ bind(L);
514 }
515 #endif
516
517 // continue at exception handler (return address removed)
518 // rax: exception
519 // rbx: exception handler
520 // rdx: throwing pc
521 __ verify_oop(rax);
522 __ jmp(rbx);
523
524 return start;
525 }
526
527 // Support for intptr_t OrderAccess::fence()
528 //
529 // Arguments :
530 //
531 // Result:
532 address StubGenerator::generate_orderaccess_fence() {
533 StubCodeMark mark(this, "StubRoutines", "orderaccess_fence");
534 address start = __ pc();
535
536 __ membar(Assembler::StoreLoad);
537 __ ret(0);
538
539 return start;
540 }
541
542
543 // Support for intptr_t get_previous_sp()
544 //
545 // This routine is used to find the previous stack pointer for the
546 // caller.
547 address StubGenerator::generate_get_previous_sp() {
548 StubCodeMark mark(this, "StubRoutines", "get_previous_sp");
549 address start = __ pc();
550
551 __ movptr(rax, rsp);
552 __ addptr(rax, 8); // return address is at the top of the stack.
553 __ ret(0);
554
555 return start;
556 }
557
558 //----------------------------------------------------------------------------------------------------
559 // Support for void verify_mxcsr()
560 //
561 // This routine is used with -Xcheck:jni to verify that native
562 // JNI code does not return to Java code without restoring the
563 // MXCSR register to our expected state.
564
565 address StubGenerator::generate_verify_mxcsr() {
566 StubCodeMark mark(this, "StubRoutines", "verify_mxcsr");
567 address start = __ pc();
568
569 const Address mxcsr_save(rsp, 0);
570
571 if (CheckJNICalls) {
572 Label ok_ret;
573 ExternalAddress mxcsr_std(StubRoutines::x86::addr_mxcsr_std());
574 __ push(rax);
575 __ subptr(rsp, wordSize); // allocate a temp location
576 __ stmxcsr(mxcsr_save);
577 __ movl(rax, mxcsr_save);
578 __ andl(rax, 0xFFC0); // Mask out any pending exceptions (only check control and mask bits)
579 __ cmp32(rax, mxcsr_std, rscratch1);
580 __ jcc(Assembler::equal, ok_ret);
581
582 __ warn("MXCSR changed by native JNI code, use -XX:+RestoreMXCSROnJNICall");
583
584 __ ldmxcsr(mxcsr_std, rscratch1);
585
586 __ bind(ok_ret);
587 __ addptr(rsp, wordSize);
588 __ pop(rax);
589 }
590
591 __ ret(0);
592
593 return start;
594 }
595
596 address StubGenerator::generate_f2i_fixup() {
597 StubCodeMark mark(this, "StubRoutines", "f2i_fixup");
598 Address inout(rsp, 5 * wordSize); // return address + 4 saves
599
600 address start = __ pc();
601
602 Label L;
603
604 __ push(rax);
605 __ push(c_rarg3);
606 __ push(c_rarg2);
607 __ push(c_rarg1);
608
609 __ movl(rax, 0x7f800000);
610 __ xorl(c_rarg3, c_rarg3);
611 __ movl(c_rarg2, inout);
612 __ movl(c_rarg1, c_rarg2);
613 __ andl(c_rarg1, 0x7fffffff);
614 __ cmpl(rax, c_rarg1); // NaN? -> 0
615 __ jcc(Assembler::negative, L);
616 __ testl(c_rarg2, c_rarg2); // signed ? min_jint : max_jint
617 __ movl(c_rarg3, 0x80000000);
618 __ movl(rax, 0x7fffffff);
619 __ cmovl(Assembler::positive, c_rarg3, rax);
620
621 __ bind(L);
622 __ movptr(inout, c_rarg3);
623
624 __ pop(c_rarg1);
625 __ pop(c_rarg2);
626 __ pop(c_rarg3);
627 __ pop(rax);
628
629 __ ret(0);
630
631 return start;
632 }
633
634 address StubGenerator::generate_f2l_fixup() {
635 StubCodeMark mark(this, "StubRoutines", "f2l_fixup");
636 Address inout(rsp, 5 * wordSize); // return address + 4 saves
637 address start = __ pc();
638
639 Label L;
640
641 __ push(rax);
642 __ push(c_rarg3);
643 __ push(c_rarg2);
644 __ push(c_rarg1);
645
646 __ movl(rax, 0x7f800000);
647 __ xorl(c_rarg3, c_rarg3);
648 __ movl(c_rarg2, inout);
649 __ movl(c_rarg1, c_rarg2);
650 __ andl(c_rarg1, 0x7fffffff);
651 __ cmpl(rax, c_rarg1); // NaN? -> 0
652 __ jcc(Assembler::negative, L);
653 __ testl(c_rarg2, c_rarg2); // signed ? min_jlong : max_jlong
654 __ mov64(c_rarg3, 0x8000000000000000);
655 __ mov64(rax, 0x7fffffffffffffff);
656 __ cmov(Assembler::positive, c_rarg3, rax);
657
658 __ bind(L);
659 __ movptr(inout, c_rarg3);
660
661 __ pop(c_rarg1);
662 __ pop(c_rarg2);
663 __ pop(c_rarg3);
664 __ pop(rax);
665
666 __ ret(0);
667
668 return start;
669 }
670
671 address StubGenerator::generate_d2i_fixup() {
672 StubCodeMark mark(this, "StubRoutines", "d2i_fixup");
673 Address inout(rsp, 6 * wordSize); // return address + 5 saves
674
675 address start = __ pc();
676
677 Label L;
678
679 __ push(rax);
680 __ push(c_rarg3);
681 __ push(c_rarg2);
682 __ push(c_rarg1);
683 __ push(c_rarg0);
684
685 __ movl(rax, 0x7ff00000);
686 __ movq(c_rarg2, inout);
687 __ movl(c_rarg3, c_rarg2);
688 __ mov(c_rarg1, c_rarg2);
689 __ mov(c_rarg0, c_rarg2);
690 __ negl(c_rarg3);
691 __ shrptr(c_rarg1, 0x20);
692 __ orl(c_rarg3, c_rarg2);
693 __ andl(c_rarg1, 0x7fffffff);
694 __ xorl(c_rarg2, c_rarg2);
695 __ shrl(c_rarg3, 0x1f);
696 __ orl(c_rarg1, c_rarg3);
697 __ cmpl(rax, c_rarg1);
698 __ jcc(Assembler::negative, L); // NaN -> 0
699 __ testptr(c_rarg0, c_rarg0); // signed ? min_jint : max_jint
700 __ movl(c_rarg2, 0x80000000);
701 __ movl(rax, 0x7fffffff);
702 __ cmov(Assembler::positive, c_rarg2, rax);
703
704 __ bind(L);
705 __ movptr(inout, c_rarg2);
706
707 __ pop(c_rarg0);
708 __ pop(c_rarg1);
709 __ pop(c_rarg2);
710 __ pop(c_rarg3);
711 __ pop(rax);
712
713 __ ret(0);
714
715 return start;
716 }
717
718 address StubGenerator::generate_d2l_fixup() {
719 StubCodeMark mark(this, "StubRoutines", "d2l_fixup");
720 Address inout(rsp, 6 * wordSize); // return address + 5 saves
721
722 address start = __ pc();
723
724 Label L;
725
726 __ push(rax);
727 __ push(c_rarg3);
728 __ push(c_rarg2);
729 __ push(c_rarg1);
730 __ push(c_rarg0);
731
732 __ movl(rax, 0x7ff00000);
733 __ movq(c_rarg2, inout);
734 __ movl(c_rarg3, c_rarg2);
735 __ mov(c_rarg1, c_rarg2);
736 __ mov(c_rarg0, c_rarg2);
737 __ negl(c_rarg3);
738 __ shrptr(c_rarg1, 0x20);
739 __ orl(c_rarg3, c_rarg2);
740 __ andl(c_rarg1, 0x7fffffff);
741 __ xorl(c_rarg2, c_rarg2);
742 __ shrl(c_rarg3, 0x1f);
743 __ orl(c_rarg1, c_rarg3);
744 __ cmpl(rax, c_rarg1);
745 __ jcc(Assembler::negative, L); // NaN -> 0
746 __ testq(c_rarg0, c_rarg0); // signed ? min_jlong : max_jlong
747 __ mov64(c_rarg2, 0x8000000000000000);
748 __ mov64(rax, 0x7fffffffffffffff);
749 __ cmovq(Assembler::positive, c_rarg2, rax);
750
751 __ bind(L);
752 __ movq(inout, c_rarg2);
753
754 __ pop(c_rarg0);
755 __ pop(c_rarg1);
756 __ pop(c_rarg2);
757 __ pop(c_rarg3);
758 __ pop(rax);
759
760 __ ret(0);
761
762 return start;
763 }
764
765 address StubGenerator::generate_count_leading_zeros_lut(const char *stub_name) {
766 __ align64();
767 StubCodeMark mark(this, "StubRoutines", stub_name);
768 address start = __ pc();
769
770 __ emit_data64(0x0101010102020304, relocInfo::none);
771 __ emit_data64(0x0000000000000000, relocInfo::none);
772 __ emit_data64(0x0101010102020304, relocInfo::none);
773 __ emit_data64(0x0000000000000000, relocInfo::none);
774 __ emit_data64(0x0101010102020304, relocInfo::none);
775 __ emit_data64(0x0000000000000000, relocInfo::none);
776 __ emit_data64(0x0101010102020304, relocInfo::none);
777 __ emit_data64(0x0000000000000000, relocInfo::none);
778
779 return start;
780 }
781
782 address StubGenerator::generate_popcount_avx_lut(const char *stub_name) {
783 __ align64();
784 StubCodeMark mark(this, "StubRoutines", stub_name);
785 address start = __ pc();
786
787 __ emit_data64(0x0302020102010100, relocInfo::none);
788 __ emit_data64(0x0403030203020201, relocInfo::none);
789 __ emit_data64(0x0302020102010100, relocInfo::none);
790 __ emit_data64(0x0403030203020201, relocInfo::none);
791 __ emit_data64(0x0302020102010100, relocInfo::none);
792 __ emit_data64(0x0403030203020201, relocInfo::none);
793 __ emit_data64(0x0302020102010100, relocInfo::none);
794 __ emit_data64(0x0403030203020201, relocInfo::none);
795
796 return start;
797 }
798
799 address StubGenerator::generate_iota_indices(const char *stub_name) {
800 __ align(CodeEntryAlignment);
801 StubCodeMark mark(this, "StubRoutines", stub_name);
802 address start = __ pc();
803 // B
804 __ emit_data64(0x0706050403020100, relocInfo::none);
805 __ emit_data64(0x0F0E0D0C0B0A0908, relocInfo::none);
806 __ emit_data64(0x1716151413121110, relocInfo::none);
807 __ emit_data64(0x1F1E1D1C1B1A1918, relocInfo::none);
808 __ emit_data64(0x2726252423222120, relocInfo::none);
809 __ emit_data64(0x2F2E2D2C2B2A2928, relocInfo::none);
810 __ emit_data64(0x3736353433323130, relocInfo::none);
811 __ emit_data64(0x3F3E3D3C3B3A3938, relocInfo::none);
812 // W
813 __ emit_data64(0x0003000200010000, relocInfo::none);
814 __ emit_data64(0x0007000600050004, relocInfo::none);
815 __ emit_data64(0x000B000A00090008, relocInfo::none);
816 __ emit_data64(0x000F000E000D000C, relocInfo::none);
817 __ emit_data64(0x0013001200110010, relocInfo::none);
818 __ emit_data64(0x0017001600150014, relocInfo::none);
819 __ emit_data64(0x001B001A00190018, relocInfo::none);
820 __ emit_data64(0x001F001E001D001C, relocInfo::none);
821 // D
822 __ emit_data64(0x0000000100000000, relocInfo::none);
823 __ emit_data64(0x0000000300000002, relocInfo::none);
824 __ emit_data64(0x0000000500000004, relocInfo::none);
825 __ emit_data64(0x0000000700000006, relocInfo::none);
826 __ emit_data64(0x0000000900000008, relocInfo::none);
827 __ emit_data64(0x0000000B0000000A, relocInfo::none);
828 __ emit_data64(0x0000000D0000000C, relocInfo::none);
829 __ emit_data64(0x0000000F0000000E, relocInfo::none);
830 // Q
831 __ emit_data64(0x0000000000000000, relocInfo::none);
832 __ emit_data64(0x0000000000000001, relocInfo::none);
833 __ emit_data64(0x0000000000000002, relocInfo::none);
834 __ emit_data64(0x0000000000000003, relocInfo::none);
835 __ emit_data64(0x0000000000000004, relocInfo::none);
836 __ emit_data64(0x0000000000000005, relocInfo::none);
837 __ emit_data64(0x0000000000000006, relocInfo::none);
838 __ emit_data64(0x0000000000000007, relocInfo::none);
839 // D - FP
840 __ emit_data64(0x3F80000000000000, relocInfo::none); // 0.0f, 1.0f
841 __ emit_data64(0x4040000040000000, relocInfo::none); // 2.0f, 3.0f
842 __ emit_data64(0x40A0000040800000, relocInfo::none); // 4.0f, 5.0f
843 __ emit_data64(0x40E0000040C00000, relocInfo::none); // 6.0f, 7.0f
844 __ emit_data64(0x4110000041000000, relocInfo::none); // 8.0f, 9.0f
845 __ emit_data64(0x4130000041200000, relocInfo::none); // 10.0f, 11.0f
846 __ emit_data64(0x4150000041400000, relocInfo::none); // 12.0f, 13.0f
847 __ emit_data64(0x4170000041600000, relocInfo::none); // 14.0f, 15.0f
848 // Q - FP
849 __ emit_data64(0x0000000000000000, relocInfo::none); // 0.0d
850 __ emit_data64(0x3FF0000000000000, relocInfo::none); // 1.0d
851 __ emit_data64(0x4000000000000000, relocInfo::none); // 2.0d
852 __ emit_data64(0x4008000000000000, relocInfo::none); // 3.0d
853 __ emit_data64(0x4010000000000000, relocInfo::none); // 4.0d
854 __ emit_data64(0x4014000000000000, relocInfo::none); // 5.0d
855 __ emit_data64(0x4018000000000000, relocInfo::none); // 6.0d
856 __ emit_data64(0x401c000000000000, relocInfo::none); // 7.0d
857 return start;
858 }
859
860 address StubGenerator::generate_vector_reverse_bit_lut(const char *stub_name) {
861 __ align(CodeEntryAlignment);
862 StubCodeMark mark(this, "StubRoutines", stub_name);
863 address start = __ pc();
864
865 __ emit_data64(0x0E060A020C040800, relocInfo::none);
866 __ emit_data64(0x0F070B030D050901, relocInfo::none);
867 __ emit_data64(0x0E060A020C040800, relocInfo::none);
868 __ emit_data64(0x0F070B030D050901, relocInfo::none);
869 __ emit_data64(0x0E060A020C040800, relocInfo::none);
870 __ emit_data64(0x0F070B030D050901, relocInfo::none);
871 __ emit_data64(0x0E060A020C040800, relocInfo::none);
872 __ emit_data64(0x0F070B030D050901, relocInfo::none);
873
874 return start;
875 }
876
877 address StubGenerator::generate_vector_reverse_byte_perm_mask_long(const char *stub_name) {
878 __ align(CodeEntryAlignment);
879 StubCodeMark mark(this, "StubRoutines", stub_name);
880 address start = __ pc();
881
882 __ emit_data64(0x0001020304050607, relocInfo::none);
883 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
884 __ emit_data64(0x0001020304050607, relocInfo::none);
885 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
886 __ emit_data64(0x0001020304050607, relocInfo::none);
887 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
888 __ emit_data64(0x0001020304050607, relocInfo::none);
889 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
890
891 return start;
892 }
893
894 address StubGenerator::generate_vector_reverse_byte_perm_mask_int(const char *stub_name) {
895 __ align(CodeEntryAlignment);
896 StubCodeMark mark(this, "StubRoutines", stub_name);
897 address start = __ pc();
898
899 __ emit_data64(0x0405060700010203, relocInfo::none);
900 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
901 __ emit_data64(0x0405060700010203, relocInfo::none);
902 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
903 __ emit_data64(0x0405060700010203, relocInfo::none);
904 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
905 __ emit_data64(0x0405060700010203, relocInfo::none);
906 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
907
908 return start;
909 }
910
911 address StubGenerator::generate_vector_reverse_byte_perm_mask_short(const char *stub_name) {
912 __ align(CodeEntryAlignment);
913 StubCodeMark mark(this, "StubRoutines", stub_name);
914 address start = __ pc();
915
916 __ emit_data64(0x0607040502030001, relocInfo::none);
917 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
918 __ emit_data64(0x0607040502030001, relocInfo::none);
919 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
920 __ emit_data64(0x0607040502030001, relocInfo::none);
921 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
922 __ emit_data64(0x0607040502030001, relocInfo::none);
923 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
924
925 return start;
926 }
927
928 address StubGenerator::generate_vector_byte_shuffle_mask(const char *stub_name) {
929 __ align(CodeEntryAlignment);
930 StubCodeMark mark(this, "StubRoutines", stub_name);
931 address start = __ pc();
932
933 __ emit_data64(0x7070707070707070, relocInfo::none);
934 __ emit_data64(0x7070707070707070, relocInfo::none);
935 __ emit_data64(0xF0F0F0F0F0F0F0F0, relocInfo::none);
936 __ emit_data64(0xF0F0F0F0F0F0F0F0, relocInfo::none);
937
938 return start;
939 }
940
941 address StubGenerator::generate_fp_mask(const char *stub_name, int64_t mask) {
942 __ align(CodeEntryAlignment);
943 StubCodeMark mark(this, "StubRoutines", stub_name);
944 address start = __ pc();
945
946 __ emit_data64( mask, relocInfo::none );
947 __ emit_data64( mask, relocInfo::none );
948
949 return start;
950 }
951
952 address StubGenerator::generate_compress_perm_table(const char *stub_name, int32_t esize) {
953 __ align(CodeEntryAlignment);
954 StubCodeMark mark(this, "StubRoutines", stub_name);
955 address start = __ pc();
956 if (esize == 32) {
957 // Loop to generate 256 x 8 int compression permute index table. A row is
958 // accessed using 8 bit index computed using vector mask. An entry in
959 // a row holds either a valid permute index corresponding to set bit position
960 // or a -1 (default) value.
961 for (int mask = 0; mask < 256; mask++) {
962 int ctr = 0;
963 for (int j = 0; j < 8; j++) {
964 if (mask & (1 << j)) {
965 __ emit_data(j, relocInfo::none);
966 ctr++;
967 }
968 }
969 for (; ctr < 8; ctr++) {
970 __ emit_data(-1, relocInfo::none);
971 }
972 }
973 } else {
974 assert(esize == 64, "");
975 // Loop to generate 16 x 4 long compression permute index table. A row is
976 // accessed using 4 bit index computed using vector mask. An entry in
977 // a row holds either a valid permute index pair for a quadword corresponding
978 // to set bit position or a -1 (default) value.
979 for (int mask = 0; mask < 16; mask++) {
980 int ctr = 0;
981 for (int j = 0; j < 4; j++) {
982 if (mask & (1 << j)) {
983 __ emit_data(2 * j, relocInfo::none);
984 __ emit_data(2 * j + 1, relocInfo::none);
985 ctr++;
986 }
987 }
988 for (; ctr < 4; ctr++) {
989 __ emit_data64(-1L, relocInfo::none);
990 }
991 }
992 }
993 return start;
994 }
995
996 address StubGenerator::generate_expand_perm_table(const char *stub_name, int32_t esize) {
997 __ align(CodeEntryAlignment);
998 StubCodeMark mark(this, "StubRoutines", stub_name);
999 address start = __ pc();
1000 if (esize == 32) {
1001 // Loop to generate 256 x 8 int expand permute index table. A row is accessed
1002 // using 8 bit index computed using vector mask. An entry in a row holds either
1003 // a valid permute index (starting from least significant lane) placed at poisition
1004 // corresponding to set bit position or a -1 (default) value.
1005 for (int mask = 0; mask < 256; mask++) {
1006 int ctr = 0;
1007 for (int j = 0; j < 8; j++) {
1008 if (mask & (1 << j)) {
1009 __ emit_data(ctr++, relocInfo::none);
1010 } else {
1011 __ emit_data(-1, relocInfo::none);
1012 }
1013 }
1014 }
1015 } else {
1016 assert(esize == 64, "");
1017 // Loop to generate 16 x 4 long expand permute index table. A row is accessed
1018 // using 4 bit index computed using vector mask. An entry in a row holds either
1019 // a valid doubleword permute index pair representing a quadword index (starting
1020 // from least significant lane) placed at poisition corresponding to set bit
1021 // position or a -1 (default) value.
1022 for (int mask = 0; mask < 16; mask++) {
1023 int ctr = 0;
1024 for (int j = 0; j < 4; j++) {
1025 if (mask & (1 << j)) {
1026 __ emit_data(2 * ctr, relocInfo::none);
1027 __ emit_data(2 * ctr + 1, relocInfo::none);
1028 ctr++;
1029 } else {
1030 __ emit_data64(-1L, relocInfo::none);
1031 }
1032 }
1033 }
1034 }
1035 return start;
1036 }
1037
1038 address StubGenerator::generate_vector_mask(const char *stub_name, int64_t mask) {
1039 __ align(CodeEntryAlignment);
1040 StubCodeMark mark(this, "StubRoutines", stub_name);
1041 address start = __ pc();
1042
1043 __ emit_data64(mask, relocInfo::none);
1044 __ emit_data64(mask, relocInfo::none);
1045 __ emit_data64(mask, relocInfo::none);
1046 __ emit_data64(mask, relocInfo::none);
1047 __ emit_data64(mask, relocInfo::none);
1048 __ emit_data64(mask, relocInfo::none);
1049 __ emit_data64(mask, relocInfo::none);
1050 __ emit_data64(mask, relocInfo::none);
1051
1052 return start;
1053 }
1054
1055 address StubGenerator::generate_vector_byte_perm_mask(const char *stub_name) {
1056 __ align(CodeEntryAlignment);
1057 StubCodeMark mark(this, "StubRoutines", stub_name);
1058 address start = __ pc();
1059
1060 __ emit_data64(0x0000000000000001, relocInfo::none);
1061 __ emit_data64(0x0000000000000003, relocInfo::none);
1062 __ emit_data64(0x0000000000000005, relocInfo::none);
1063 __ emit_data64(0x0000000000000007, relocInfo::none);
1064 __ emit_data64(0x0000000000000000, relocInfo::none);
1065 __ emit_data64(0x0000000000000002, relocInfo::none);
1066 __ emit_data64(0x0000000000000004, relocInfo::none);
1067 __ emit_data64(0x0000000000000006, relocInfo::none);
1068
1069 return start;
1070 }
1071
1072 address StubGenerator::generate_vector_fp_mask(const char *stub_name, int64_t mask) {
1073 __ align(CodeEntryAlignment);
1074 StubCodeMark mark(this, "StubRoutines", stub_name);
1075 address start = __ pc();
1076
1077 __ emit_data64(mask, relocInfo::none);
1078 __ emit_data64(mask, relocInfo::none);
1079 __ emit_data64(mask, relocInfo::none);
1080 __ emit_data64(mask, relocInfo::none);
1081 __ emit_data64(mask, relocInfo::none);
1082 __ emit_data64(mask, relocInfo::none);
1083 __ emit_data64(mask, relocInfo::none);
1084 __ emit_data64(mask, relocInfo::none);
1085
1086 return start;
1087 }
1088
1089 address StubGenerator::generate_vector_custom_i32(const char *stub_name, Assembler::AvxVectorLen len,
1090 int32_t val0, int32_t val1, int32_t val2, int32_t val3,
1091 int32_t val4, int32_t val5, int32_t val6, int32_t val7,
1092 int32_t val8, int32_t val9, int32_t val10, int32_t val11,
1093 int32_t val12, int32_t val13, int32_t val14, int32_t val15) {
1094 __ align(CodeEntryAlignment);
1095 StubCodeMark mark(this, "StubRoutines", stub_name);
1096 address start = __ pc();
1097
1098 assert(len != Assembler::AVX_NoVec, "vector len must be specified");
1099 __ emit_data(val0, relocInfo::none, 0);
1100 __ emit_data(val1, relocInfo::none, 0);
1101 __ emit_data(val2, relocInfo::none, 0);
1102 __ emit_data(val3, relocInfo::none, 0);
1103 if (len >= Assembler::AVX_256bit) {
1104 __ emit_data(val4, relocInfo::none, 0);
1105 __ emit_data(val5, relocInfo::none, 0);
1106 __ emit_data(val6, relocInfo::none, 0);
1107 __ emit_data(val7, relocInfo::none, 0);
1108 if (len >= Assembler::AVX_512bit) {
1109 __ emit_data(val8, relocInfo::none, 0);
1110 __ emit_data(val9, relocInfo::none, 0);
1111 __ emit_data(val10, relocInfo::none, 0);
1112 __ emit_data(val11, relocInfo::none, 0);
1113 __ emit_data(val12, relocInfo::none, 0);
1114 __ emit_data(val13, relocInfo::none, 0);
1115 __ emit_data(val14, relocInfo::none, 0);
1116 __ emit_data(val15, relocInfo::none, 0);
1117 }
1118 }
1119 return start;
1120 }
1121
1122 // Non-destructive plausibility checks for oops
1123 //
1124 // Arguments:
1125 // all args on stack!
1126 //
1127 // Stack after saving c_rarg3:
1128 // [tos + 0]: saved c_rarg3
1129 // [tos + 1]: saved c_rarg2
1130 // [tos + 2]: saved r12 (several TemplateTable methods use it)
1131 // [tos + 3]: saved flags
1132 // [tos + 4]: return address
1133 // * [tos + 5]: error message (char*)
1134 // * [tos + 6]: object to verify (oop)
1135 // * [tos + 7]: saved rax - saved by caller and bashed
1136 // * [tos + 8]: saved r10 (rscratch1) - saved by caller
1137 // * = popped on exit
1138 address StubGenerator::generate_verify_oop() {
1139 StubCodeMark mark(this, "StubRoutines", "verify_oop");
1140 address start = __ pc();
1141
1142 Label exit, error;
1143
1144 __ pushf();
1145 __ incrementl(ExternalAddress((address) StubRoutines::verify_oop_count_addr()), rscratch1);
1146
1147 __ push(r12);
1148
1149 // save c_rarg2 and c_rarg3
1150 __ push(c_rarg2);
1151 __ push(c_rarg3);
1152
1153 enum {
1154 // After previous pushes.
1155 oop_to_verify = 6 * wordSize,
1156 saved_rax = 7 * wordSize,
1157 saved_r10 = 8 * wordSize,
1158
1159 // Before the call to MacroAssembler::debug(), see below.
1160 return_addr = 16 * wordSize,
1161 error_msg = 17 * wordSize
1162 };
1163
1164 // get object
1165 __ movptr(rax, Address(rsp, oop_to_verify));
1166
1167 // make sure object is 'reasonable'
1168 __ testptr(rax, rax);
1169 __ jcc(Assembler::zero, exit); // if obj is null it is OK
1170
1171 BarrierSetAssembler* bs_asm = BarrierSet::barrier_set()->barrier_set_assembler();
1172 bs_asm->check_oop(_masm, rax, c_rarg2, c_rarg3, error);
1173
1174 // return if everything seems ok
1175 __ bind(exit);
1176 __ movptr(rax, Address(rsp, saved_rax)); // get saved rax back
1177 __ movptr(rscratch1, Address(rsp, saved_r10)); // get saved r10 back
1178 __ pop(c_rarg3); // restore c_rarg3
1179 __ pop(c_rarg2); // restore c_rarg2
1180 __ pop(r12); // restore r12
1181 __ popf(); // restore flags
1182 __ ret(4 * wordSize); // pop caller saved stuff
1183
1184 // handle errors
1185 __ bind(error);
1186 __ movptr(rax, Address(rsp, saved_rax)); // get saved rax back
1187 __ movptr(rscratch1, Address(rsp, saved_r10)); // get saved r10 back
1188 __ pop(c_rarg3); // get saved c_rarg3 back
1189 __ pop(c_rarg2); // get saved c_rarg2 back
1190 __ pop(r12); // get saved r12 back
1191 __ popf(); // get saved flags off stack --
1192 // will be ignored
1193
1194 __ pusha(); // push registers
1195 // (rip is already
1196 // already pushed)
1197 // debug(char* msg, int64_t pc, int64_t regs[])
1198 // We've popped the registers we'd saved (c_rarg3, c_rarg2 and flags), and
1199 // pushed all the registers, so now the stack looks like:
1200 // [tos + 0] 16 saved registers
1201 // [tos + 16] return address
1202 // * [tos + 17] error message (char*)
1203 // * [tos + 18] object to verify (oop)
1204 // * [tos + 19] saved rax - saved by caller and bashed
1205 // * [tos + 20] saved r10 (rscratch1) - saved by caller
1206 // * = popped on exit
1207
1208 __ movptr(c_rarg0, Address(rsp, error_msg)); // pass address of error message
1209 __ movptr(c_rarg1, Address(rsp, return_addr)); // pass return address
1210 __ movq(c_rarg2, rsp); // pass address of regs on stack
1211 __ mov(r12, rsp); // remember rsp
1212 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1213 __ andptr(rsp, -16); // align stack as required by ABI
1214 BLOCK_COMMENT("call MacroAssembler::debug");
1215 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64)));
1216 __ hlt();
1217
1218 return start;
1219 }
1220
1221
1222 // Shuffle first three arg regs on Windows into Linux/Solaris locations.
1223 //
1224 // Outputs:
1225 // rdi - rcx
1226 // rsi - rdx
1227 // rdx - r8
1228 // rcx - r9
1229 //
1230 // Registers r9 and r10 are used to save rdi and rsi on Windows, which latter
1231 // are non-volatile. r9 and r10 should not be used by the caller.
1232 //
1233 void StubGenerator::setup_arg_regs(int nargs) {
1234 const Register saved_rdi = r9;
1235 const Register saved_rsi = r10;
1236 assert(nargs == 3 || nargs == 4, "else fix");
1237 #ifdef _WIN64
1238 assert(c_rarg0 == rcx && c_rarg1 == rdx && c_rarg2 == r8 && c_rarg3 == r9,
1239 "unexpected argument registers");
1240 if (nargs == 4) {
1241 __ mov(rax, r9); // r9 is also saved_rdi
1242 }
1243 __ movptr(saved_rdi, rdi);
1244 __ movptr(saved_rsi, rsi);
1245 __ mov(rdi, rcx); // c_rarg0
1246 __ mov(rsi, rdx); // c_rarg1
1247 __ mov(rdx, r8); // c_rarg2
1248 if (nargs == 4) {
1249 __ mov(rcx, rax); // c_rarg3 (via rax)
1250 }
1251 #else
1252 assert(c_rarg0 == rdi && c_rarg1 == rsi && c_rarg2 == rdx && c_rarg3 == rcx,
1253 "unexpected argument registers");
1254 #endif
1255 DEBUG_ONLY(_regs_in_thread = false;)
1256 }
1257
1258
1259 void StubGenerator::restore_arg_regs() {
1260 assert(!_regs_in_thread, "wrong call to restore_arg_regs");
1261 const Register saved_rdi = r9;
1262 const Register saved_rsi = r10;
1263 #ifdef _WIN64
1264 __ movptr(rdi, saved_rdi);
1265 __ movptr(rsi, saved_rsi);
1266 #endif
1267 }
1268
1269
1270 // This is used in places where r10 is a scratch register, and can
1271 // be adapted if r9 is needed also.
1272 void StubGenerator::setup_arg_regs_using_thread(int nargs) {
1273 const Register saved_r15 = r9;
1274 assert(nargs == 3 || nargs == 4, "else fix");
1275 #ifdef _WIN64
1276 if (nargs == 4) {
1277 __ mov(rax, r9); // r9 is also saved_r15
1278 }
1279 __ mov(saved_r15, r15); // r15 is callee saved and needs to be restored
1280 __ get_thread(r15_thread);
1281 assert(c_rarg0 == rcx && c_rarg1 == rdx && c_rarg2 == r8 && c_rarg3 == r9,
1282 "unexpected argument registers");
1283 __ movptr(Address(r15_thread, in_bytes(JavaThread::windows_saved_rdi_offset())), rdi);
1284 __ movptr(Address(r15_thread, in_bytes(JavaThread::windows_saved_rsi_offset())), rsi);
1285
1286 __ mov(rdi, rcx); // c_rarg0
1287 __ mov(rsi, rdx); // c_rarg1
1288 __ mov(rdx, r8); // c_rarg2
1289 if (nargs == 4) {
1290 __ mov(rcx, rax); // c_rarg3 (via rax)
1291 }
1292 #else
1293 assert(c_rarg0 == rdi && c_rarg1 == rsi && c_rarg2 == rdx && c_rarg3 == rcx,
1294 "unexpected argument registers");
1295 #endif
1296 DEBUG_ONLY(_regs_in_thread = true;)
1297 }
1298
1299
1300 void StubGenerator::restore_arg_regs_using_thread() {
1301 assert(_regs_in_thread, "wrong call to restore_arg_regs");
1302 const Register saved_r15 = r9;
1303 #ifdef _WIN64
1304 __ get_thread(r15_thread);
1305 __ movptr(rsi, Address(r15_thread, in_bytes(JavaThread::windows_saved_rsi_offset())));
1306 __ movptr(rdi, Address(r15_thread, in_bytes(JavaThread::windows_saved_rdi_offset())));
1307 __ mov(r15, saved_r15); // r15 is callee saved and needs to be restored
1308 #endif
1309 }
1310
1311
1312 void StubGenerator::setup_argument_regs(BasicType type) {
1313 if (type == T_BYTE || type == T_SHORT) {
1314 setup_arg_regs(); // from => rdi, to => rsi, count => rdx
1315 // r9 and r10 may be used to save non-volatile registers
1316 } else {
1317 setup_arg_regs_using_thread(); // from => rdi, to => rsi, count => rdx
1318 // r9 is used to save r15_thread
1319 }
1320 }
1321
1322
1323 void StubGenerator::restore_argument_regs(BasicType type) {
1324 if (type == T_BYTE || type == T_SHORT) {
1325 restore_arg_regs();
1326 } else {
1327 restore_arg_regs_using_thread();
1328 }
1329 }
1330
1331 address StubGenerator::generate_data_cache_writeback() {
1332 const Register src = c_rarg0; // source address
1333
1334 __ align(CodeEntryAlignment);
1335
1336 StubCodeMark mark(this, "StubRoutines", "_data_cache_writeback");
1337
1338 address start = __ pc();
1339
1340 __ enter();
1341 __ cache_wb(Address(src, 0));
1342 __ leave();
1343 __ ret(0);
1344
1345 return start;
1346 }
1347
1348 address StubGenerator::generate_data_cache_writeback_sync() {
1349 const Register is_pre = c_rarg0; // pre or post sync
1350
1351 __ align(CodeEntryAlignment);
1352
1353 StubCodeMark mark(this, "StubRoutines", "_data_cache_writeback_sync");
1354
1355 // pre wbsync is a no-op
1356 // post wbsync translates to an sfence
1357
1358 Label skip;
1359 address start = __ pc();
1360
1361 __ enter();
1362 __ cmpl(is_pre, 0);
1363 __ jcc(Assembler::notEqual, skip);
1364 __ cache_wbsync(false);
1365 __ bind(skip);
1366 __ leave();
1367 __ ret(0);
1368
1369 return start;
1370 }
1371
1372 // ofs and limit are use for multi-block byte array.
1373 // int com.sun.security.provider.MD5.implCompress(byte[] b, int ofs)
1374 address StubGenerator::generate_md5_implCompress(bool multi_block, const char *name) {
1375 __ align(CodeEntryAlignment);
1376 StubCodeMark mark(this, "StubRoutines", name);
1377 address start = __ pc();
1378
1379 const Register buf_param = r15;
1380 const Address state_param(rsp, 0 * wordSize);
1381 const Address ofs_param (rsp, 1 * wordSize );
1382 const Address limit_param(rsp, 1 * wordSize + 4);
1383
1384 __ enter();
1385 __ push(rbx);
1386 __ push(rdi);
1387 __ push(rsi);
1388 __ push(r15);
1389 __ subptr(rsp, 2 * wordSize);
1390
1391 __ movptr(buf_param, c_rarg0);
1392 __ movptr(state_param, c_rarg1);
1393 if (multi_block) {
1394 __ movl(ofs_param, c_rarg2);
1395 __ movl(limit_param, c_rarg3);
1396 }
1397 __ fast_md5(buf_param, state_param, ofs_param, limit_param, multi_block);
1398
1399 __ addptr(rsp, 2 * wordSize);
1400 __ pop(r15);
1401 __ pop(rsi);
1402 __ pop(rdi);
1403 __ pop(rbx);
1404 __ leave();
1405 __ ret(0);
1406
1407 return start;
1408 }
1409
1410 address StubGenerator::generate_upper_word_mask() {
1411 __ align64();
1412 StubCodeMark mark(this, "StubRoutines", "upper_word_mask");
1413 address start = __ pc();
1414
1415 __ emit_data64(0x0000000000000000, relocInfo::none);
1416 __ emit_data64(0xFFFFFFFF00000000, relocInfo::none);
1417
1418 return start;
1419 }
1420
1421 address StubGenerator::generate_shuffle_byte_flip_mask() {
1422 __ align64();
1423 StubCodeMark mark(this, "StubRoutines", "shuffle_byte_flip_mask");
1424 address start = __ pc();
1425
1426 __ emit_data64(0x08090a0b0c0d0e0f, relocInfo::none);
1427 __ emit_data64(0x0001020304050607, relocInfo::none);
1428
1429 return start;
1430 }
1431
1432 // ofs and limit are use for multi-block byte array.
1433 // int com.sun.security.provider.DigestBase.implCompressMultiBlock(byte[] b, int ofs, int limit)
1434 address StubGenerator::generate_sha1_implCompress(bool multi_block, const char *name) {
1435 __ align(CodeEntryAlignment);
1436 StubCodeMark mark(this, "StubRoutines", name);
1437 address start = __ pc();
1438
1439 Register buf = c_rarg0;
1440 Register state = c_rarg1;
1441 Register ofs = c_rarg2;
1442 Register limit = c_rarg3;
1443
1444 const XMMRegister abcd = xmm0;
1445 const XMMRegister e0 = xmm1;
1446 const XMMRegister e1 = xmm2;
1447 const XMMRegister msg0 = xmm3;
1448
1449 const XMMRegister msg1 = xmm4;
1450 const XMMRegister msg2 = xmm5;
1451 const XMMRegister msg3 = xmm6;
1452 const XMMRegister shuf_mask = xmm7;
1453
1454 __ enter();
1455
1456 __ subptr(rsp, 4 * wordSize);
1457
1458 __ fast_sha1(abcd, e0, e1, msg0, msg1, msg2, msg3, shuf_mask,
1459 buf, state, ofs, limit, rsp, multi_block);
1460
1461 __ addptr(rsp, 4 * wordSize);
1462
1463 __ leave();
1464 __ ret(0);
1465
1466 return start;
1467 }
1468
1469 address StubGenerator::generate_pshuffle_byte_flip_mask() {
1470 __ align64();
1471 StubCodeMark mark(this, "StubRoutines", "pshuffle_byte_flip_mask");
1472 address start = __ pc();
1473
1474 __ emit_data64(0x0405060700010203, relocInfo::none);
1475 __ emit_data64(0x0c0d0e0f08090a0b, relocInfo::none);
1476
1477 if (VM_Version::supports_avx2()) {
1478 __ emit_data64(0x0405060700010203, relocInfo::none); // second copy
1479 __ emit_data64(0x0c0d0e0f08090a0b, relocInfo::none);
1480 // _SHUF_00BA
1481 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1482 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1483 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1484 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1485 // _SHUF_DC00
1486 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1487 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1488 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1489 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1490 }
1491
1492 return start;
1493 }
1494
1495 //Mask for byte-swapping a couple of qwords in an XMM register using (v)pshufb.
1496 address StubGenerator::generate_pshuffle_byte_flip_mask_sha512() {
1497 __ align32();
1498 StubCodeMark mark(this, "StubRoutines", "pshuffle_byte_flip_mask_sha512");
1499 address start = __ pc();
1500
1501 if (VM_Version::supports_avx2()) {
1502 __ emit_data64(0x0001020304050607, relocInfo::none); // PSHUFFLE_BYTE_FLIP_MASK
1503 __ emit_data64(0x08090a0b0c0d0e0f, relocInfo::none);
1504 __ emit_data64(0x1011121314151617, relocInfo::none);
1505 __ emit_data64(0x18191a1b1c1d1e1f, relocInfo::none);
1506 __ emit_data64(0x0000000000000000, relocInfo::none); //MASK_YMM_LO
1507 __ emit_data64(0x0000000000000000, relocInfo::none);
1508 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1509 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1510 }
1511
1512 return start;
1513 }
1514
1515 // ofs and limit are use for multi-block byte array.
1516 // int com.sun.security.provider.DigestBase.implCompressMultiBlock(byte[] b, int ofs, int limit)
1517 address StubGenerator::generate_sha256_implCompress(bool multi_block, const char *name) {
1518 assert(VM_Version::supports_sha() || VM_Version::supports_avx2(), "");
1519 __ align(CodeEntryAlignment);
1520 StubCodeMark mark(this, "StubRoutines", name);
1521 address start = __ pc();
1522
1523 Register buf = c_rarg0;
1524 Register state = c_rarg1;
1525 Register ofs = c_rarg2;
1526 Register limit = c_rarg3;
1527
1528 const XMMRegister msg = xmm0;
1529 const XMMRegister state0 = xmm1;
1530 const XMMRegister state1 = xmm2;
1531 const XMMRegister msgtmp0 = xmm3;
1532
1533 const XMMRegister msgtmp1 = xmm4;
1534 const XMMRegister msgtmp2 = xmm5;
1535 const XMMRegister msgtmp3 = xmm6;
1536 const XMMRegister msgtmp4 = xmm7;
1537
1538 const XMMRegister shuf_mask = xmm8;
1539
1540 __ enter();
1541
1542 __ subptr(rsp, 4 * wordSize);
1543
1544 if (VM_Version::supports_sha()) {
1545 __ fast_sha256(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
1546 buf, state, ofs, limit, rsp, multi_block, shuf_mask);
1547 } else if (VM_Version::supports_avx2()) {
1548 __ sha256_AVX2(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
1549 buf, state, ofs, limit, rsp, multi_block, shuf_mask);
1550 }
1551 __ addptr(rsp, 4 * wordSize);
1552 __ vzeroupper();
1553 __ leave();
1554 __ ret(0);
1555
1556 return start;
1557 }
1558
1559 address StubGenerator::generate_sha512_implCompress(bool multi_block, const char *name) {
1560 assert(VM_Version::supports_avx2(), "");
1561 assert(VM_Version::supports_bmi2() || VM_Version::supports_sha512(), "");
1562 __ align(CodeEntryAlignment);
1563 StubCodeMark mark(this, "StubRoutines", name);
1564 address start = __ pc();
1565
1566 Register buf = c_rarg0;
1567 Register state = c_rarg1;
1568 Register ofs = c_rarg2;
1569 Register limit = c_rarg3;
1570
1571 __ enter();
1572
1573 if (VM_Version::supports_sha512()) {
1574 __ sha512_update_ni_x1(state, buf, ofs, limit, multi_block);
1575 } else {
1576 const XMMRegister msg = xmm0;
1577 const XMMRegister state0 = xmm1;
1578 const XMMRegister state1 = xmm2;
1579 const XMMRegister msgtmp0 = xmm3;
1580 const XMMRegister msgtmp1 = xmm4;
1581 const XMMRegister msgtmp2 = xmm5;
1582 const XMMRegister msgtmp3 = xmm6;
1583 const XMMRegister msgtmp4 = xmm7;
1584
1585 const XMMRegister shuf_mask = xmm8;
1586 __ sha512_AVX2(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
1587 buf, state, ofs, limit, rsp, multi_block, shuf_mask);
1588 }
1589 __ vzeroupper();
1590 __ leave();
1591 __ ret(0);
1592
1593 return start;
1594 }
1595
1596 address StubGenerator::base64_shuffle_addr() {
1597 __ align64();
1598 StubCodeMark mark(this, "StubRoutines", "shuffle_base64");
1599 address start = __ pc();
1600
1601 assert(((unsigned long long)start & 0x3f) == 0,
1602 "Alignment problem (0x%08llx)", (unsigned long long)start);
1603 __ emit_data64(0x0405030401020001, relocInfo::none);
1604 __ emit_data64(0x0a0b090a07080607, relocInfo::none);
1605 __ emit_data64(0x10110f100d0e0c0d, relocInfo::none);
1606 __ emit_data64(0x1617151613141213, relocInfo::none);
1607 __ emit_data64(0x1c1d1b1c191a1819, relocInfo::none);
1608 __ emit_data64(0x222321221f201e1f, relocInfo::none);
1609 __ emit_data64(0x2829272825262425, relocInfo::none);
1610 __ emit_data64(0x2e2f2d2e2b2c2a2b, relocInfo::none);
1611
1612 return start;
1613 }
1614
1615 address StubGenerator::base64_avx2_shuffle_addr() {
1616 __ align32();
1617 StubCodeMark mark(this, "StubRoutines", "avx2_shuffle_base64");
1618 address start = __ pc();
1619
1620 __ emit_data64(0x0809070805060405, relocInfo::none);
1621 __ emit_data64(0x0e0f0d0e0b0c0a0b, relocInfo::none);
1622 __ emit_data64(0x0405030401020001, relocInfo::none);
1623 __ emit_data64(0x0a0b090a07080607, relocInfo::none);
1624
1625 return start;
1626 }
1627
1628 address StubGenerator::base64_avx2_input_mask_addr() {
1629 __ align32();
1630 StubCodeMark mark(this, "StubRoutines", "avx2_input_mask_base64");
1631 address start = __ pc();
1632
1633 __ emit_data64(0x8000000000000000, relocInfo::none);
1634 __ emit_data64(0x8000000080000000, relocInfo::none);
1635 __ emit_data64(0x8000000080000000, relocInfo::none);
1636 __ emit_data64(0x8000000080000000, relocInfo::none);
1637
1638 return start;
1639 }
1640
1641 address StubGenerator::base64_avx2_lut_addr() {
1642 __ align32();
1643 StubCodeMark mark(this, "StubRoutines", "avx2_lut_base64");
1644 address start = __ pc();
1645
1646 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
1647 __ emit_data64(0x0000f0edfcfcfcfc, relocInfo::none);
1648 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
1649 __ emit_data64(0x0000f0edfcfcfcfc, relocInfo::none);
1650
1651 // URL LUT
1652 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
1653 __ emit_data64(0x000020effcfcfcfc, relocInfo::none);
1654 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
1655 __ emit_data64(0x000020effcfcfcfc, relocInfo::none);
1656
1657 return start;
1658 }
1659
1660 address StubGenerator::base64_encoding_table_addr() {
1661 __ align64();
1662 StubCodeMark mark(this, "StubRoutines", "encoding_table_base64");
1663 address start = __ pc();
1664
1665 assert(((unsigned long long)start & 0x3f) == 0, "Alignment problem (0x%08llx)", (unsigned long long)start);
1666 __ emit_data64(0x4847464544434241, relocInfo::none);
1667 __ emit_data64(0x504f4e4d4c4b4a49, relocInfo::none);
1668 __ emit_data64(0x5857565554535251, relocInfo::none);
1669 __ emit_data64(0x6665646362615a59, relocInfo::none);
1670 __ emit_data64(0x6e6d6c6b6a696867, relocInfo::none);
1671 __ emit_data64(0x767574737271706f, relocInfo::none);
1672 __ emit_data64(0x333231307a797877, relocInfo::none);
1673 __ emit_data64(0x2f2b393837363534, relocInfo::none);
1674
1675 // URL table
1676 __ emit_data64(0x4847464544434241, relocInfo::none);
1677 __ emit_data64(0x504f4e4d4c4b4a49, relocInfo::none);
1678 __ emit_data64(0x5857565554535251, relocInfo::none);
1679 __ emit_data64(0x6665646362615a59, relocInfo::none);
1680 __ emit_data64(0x6e6d6c6b6a696867, relocInfo::none);
1681 __ emit_data64(0x767574737271706f, relocInfo::none);
1682 __ emit_data64(0x333231307a797877, relocInfo::none);
1683 __ emit_data64(0x5f2d393837363534, relocInfo::none);
1684
1685 return start;
1686 }
1687
1688 // Code for generating Base64 encoding.
1689 // Intrinsic function prototype in Base64.java:
1690 // private void encodeBlock(byte[] src, int sp, int sl, byte[] dst, int dp,
1691 // boolean isURL) {
1692 address StubGenerator::generate_base64_encodeBlock()
1693 {
1694 __ align(CodeEntryAlignment);
1695 StubCodeMark mark(this, "StubRoutines", "implEncode");
1696 address start = __ pc();
1697
1698 __ enter();
1699
1700 // Save callee-saved registers before using them
1701 __ push(r12);
1702 __ push(r13);
1703 __ push(r14);
1704 __ push(r15);
1705
1706 // arguments
1707 const Register source = c_rarg0; // Source Array
1708 const Register start_offset = c_rarg1; // start offset
1709 const Register end_offset = c_rarg2; // end offset
1710 const Register dest = c_rarg3; // destination array
1711
1712 #ifndef _WIN64
1713 const Register dp = c_rarg4; // Position for writing to dest array
1714 const Register isURL = c_rarg5; // Base64 or URL character set
1715 #else
1716 const Address dp_mem(rbp, 6 * wordSize); // length is on stack on Win64
1717 const Address isURL_mem(rbp, 7 * wordSize);
1718 const Register isURL = r10; // pick the volatile windows register
1719 const Register dp = r12;
1720 __ movl(dp, dp_mem);
1721 __ movl(isURL, isURL_mem);
1722 #endif
1723
1724 const Register length = r14;
1725 const Register encode_table = r13;
1726 Label L_process3, L_exit, L_processdata, L_vbmiLoop, L_not512, L_32byteLoop;
1727
1728 // calculate length from offsets
1729 __ movl(length, end_offset);
1730 __ subl(length, start_offset);
1731 __ jcc(Assembler::lessEqual, L_exit);
1732
1733 // Code for 512-bit VBMI encoding. Encodes 48 input bytes into 64
1734 // output bytes. We read 64 input bytes and ignore the last 16, so be
1735 // sure not to read past the end of the input buffer.
1736 if (VM_Version::supports_avx512_vbmi()) {
1737 __ cmpl(length, 64); // Do not overrun input buffer.
1738 __ jcc(Assembler::below, L_not512);
1739
1740 __ shll(isURL, 6); // index into decode table based on isURL
1741 __ lea(encode_table, ExternalAddress(StubRoutines::x86::base64_encoding_table_addr()));
1742 __ addptr(encode_table, isURL);
1743 __ shrl(isURL, 6); // restore isURL
1744
1745 __ mov64(rax, 0x3036242a1016040aull); // Shifts
1746 __ evmovdquq(xmm3, ExternalAddress(StubRoutines::x86::base64_shuffle_addr()), Assembler::AVX_512bit, r15);
1747 __ evmovdquq(xmm2, Address(encode_table, 0), Assembler::AVX_512bit);
1748 __ evpbroadcastq(xmm1, rax, Assembler::AVX_512bit);
1749
1750 __ align32();
1751 __ BIND(L_vbmiLoop);
1752
1753 __ vpermb(xmm0, xmm3, Address(source, start_offset), Assembler::AVX_512bit);
1754 __ subl(length, 48);
1755
1756 // Put the input bytes into the proper lanes for writing, then
1757 // encode them.
1758 __ evpmultishiftqb(xmm0, xmm1, xmm0, Assembler::AVX_512bit);
1759 __ vpermb(xmm0, xmm0, xmm2, Assembler::AVX_512bit);
1760
1761 // Write to destination
1762 __ evmovdquq(Address(dest, dp), xmm0, Assembler::AVX_512bit);
1763
1764 __ addptr(dest, 64);
1765 __ addptr(source, 48);
1766 __ cmpl(length, 64);
1767 __ jcc(Assembler::aboveEqual, L_vbmiLoop);
1768
1769 __ vzeroupper();
1770 }
1771
1772 __ BIND(L_not512);
1773 if (VM_Version::supports_avx2()) {
1774 /*
1775 ** This AVX2 encoder is based off the paper at:
1776 ** https://dl.acm.org/doi/10.1145/3132709
1777 **
1778 ** We use AVX2 SIMD instructions to encode 24 bytes into 32
1779 ** output bytes.
1780 **
1781 */
1782 // Lengths under 32 bytes are done with scalar routine
1783 __ cmpl(length, 31);
1784 __ jcc(Assembler::belowEqual, L_process3);
1785
1786 // Set up supporting constant table data
1787 __ vmovdqu(xmm9, ExternalAddress(StubRoutines::x86::base64_avx2_shuffle_addr()), rax);
1788 // 6-bit mask for 2nd and 4th (and multiples) 6-bit values
1789 __ movl(rax, 0x0fc0fc00);
1790 __ movdl(xmm8, rax);
1791 __ vmovdqu(xmm1, ExternalAddress(StubRoutines::x86::base64_avx2_input_mask_addr()), rax);
1792 __ vpbroadcastd(xmm8, xmm8, Assembler::AVX_256bit);
1793
1794 // Multiplication constant for "shifting" right by 6 and 10
1795 // bits
1796 __ movl(rax, 0x04000040);
1797
1798 __ subl(length, 24);
1799 __ movdl(xmm7, rax);
1800 __ vpbroadcastd(xmm7, xmm7, Assembler::AVX_256bit);
1801
1802 // For the first load, we mask off reading of the first 4
1803 // bytes into the register. This is so we can get 4 3-byte
1804 // chunks into each lane of the register, avoiding having to
1805 // handle end conditions. We then shuffle these bytes into a
1806 // specific order so that manipulation is easier.
1807 //
1808 // The initial read loads the XMM register like this:
1809 //
1810 // Lower 128-bit lane:
1811 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
1812 // | XX | XX | XX | XX | A0 | A1 | A2 | B0 | B1 | B2 | C0 | C1
1813 // | C2 | D0 | D1 | D2 |
1814 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
1815 //
1816 // Upper 128-bit lane:
1817 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
1818 // | E0 | E1 | E2 | F0 | F1 | F2 | G0 | G1 | G2 | H0 | H1 | H2
1819 // | XX | XX | XX | XX |
1820 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
1821 //
1822 // Where A0 is the first input byte, B0 is the fourth, etc.
1823 // The alphabetical significance denotes the 3 bytes to be
1824 // consumed and encoded into 4 bytes.
1825 //
1826 // We then shuffle the register so each 32-bit word contains
1827 // the sequence:
1828 // A1 A0 A2 A1, B1, B0, B2, B1, etc.
1829 // Each of these byte sequences are then manipulated into 4
1830 // 6-bit values ready for encoding.
1831 //
1832 // If we focus on one set of 3-byte chunks, changing the
1833 // nomenclature such that A0 => a, A1 => b, and A2 => c, we
1834 // shuffle such that each 24-bit chunk contains:
1835 //
1836 // b7 b6 b5 b4 b3 b2 b1 b0 | a7 a6 a5 a4 a3 a2 a1 a0 | c7 c6
1837 // c5 c4 c3 c2 c1 c0 | b7 b6 b5 b4 b3 b2 b1 b0
1838 // Explain this step.
1839 // b3 b2 b1 b0 c5 c4 c3 c2 | c1 c0 d5 d4 d3 d2 d1 d0 | a5 a4
1840 // a3 a2 a1 a0 b5 b4 | b3 b2 b1 b0 c5 c4 c3 c2
1841 //
1842 // W first and off all but bits 4-9 and 16-21 (c5..c0 and
1843 // a5..a0) and shift them using a vector multiplication
1844 // operation (vpmulhuw) which effectively shifts c right by 6
1845 // bits and a right by 10 bits. We similarly mask bits 10-15
1846 // (d5..d0) and 22-27 (b5..b0) and shift them left by 8 and 4
1847 // bits respectively. This is done using vpmullw. We end up
1848 // with 4 6-bit values, thus splitting the 3 input bytes,
1849 // ready for encoding:
1850 // 0 0 d5..d0 0 0 c5..c0 0 0 b5..b0 0 0 a5..a0
1851 //
1852 // For translation, we recognize that there are 5 distinct
1853 // ranges of legal Base64 characters as below:
1854 //
1855 // +-------------+-------------+------------+
1856 // | 6-bit value | ASCII range | offset |
1857 // +-------------+-------------+------------+
1858 // | 0..25 | A..Z | 65 |
1859 // | 26..51 | a..z | 71 |
1860 // | 52..61 | 0..9 | -4 |
1861 // | 62 | + or - | -19 or -17 |
1862 // | 63 | / or _ | -16 or 32 |
1863 // +-------------+-------------+------------+
1864 //
1865 // We note that vpshufb does a parallel lookup in a
1866 // destination register using the lower 4 bits of bytes from a
1867 // source register. If we use a saturated subtraction and
1868 // subtract 51 from each 6-bit value, bytes from [0,51]
1869 // saturate to 0, and [52,63] map to a range of [1,12]. We
1870 // distinguish the [0,25] and [26,51] ranges by assigning a
1871 // value of 13 for all 6-bit values less than 26. We end up
1872 // with:
1873 //
1874 // +-------------+-------------+------------+
1875 // | 6-bit value | Reduced | offset |
1876 // +-------------+-------------+------------+
1877 // | 0..25 | 13 | 65 |
1878 // | 26..51 | 0 | 71 |
1879 // | 52..61 | 0..9 | -4 |
1880 // | 62 | 11 | -19 or -17 |
1881 // | 63 | 12 | -16 or 32 |
1882 // +-------------+-------------+------------+
1883 //
1884 // We then use a final vpshufb to add the appropriate offset,
1885 // translating the bytes.
1886 //
1887 // Load input bytes - only 28 bytes. Mask the first load to
1888 // not load into the full register.
1889 __ vpmaskmovd(xmm1, xmm1, Address(source, start_offset, Address::times_1, -4), Assembler::AVX_256bit);
1890
1891 // Move 3-byte chunks of input (12 bytes) into 16 bytes,
1892 // ordering by:
1893 // 1, 0, 2, 1; 4, 3, 5, 4; etc. This groups 6-bit chunks
1894 // for easy masking
1895 __ vpshufb(xmm1, xmm1, xmm9, Assembler::AVX_256bit);
1896
1897 __ addl(start_offset, 24);
1898
1899 // Load masking register for first and third (and multiples)
1900 // 6-bit values.
1901 __ movl(rax, 0x003f03f0);
1902 __ movdl(xmm6, rax);
1903 __ vpbroadcastd(xmm6, xmm6, Assembler::AVX_256bit);
1904 // Multiplication constant for "shifting" left by 4 and 8 bits
1905 __ movl(rax, 0x01000010);
1906 __ movdl(xmm5, rax);
1907 __ vpbroadcastd(xmm5, xmm5, Assembler::AVX_256bit);
1908
1909 // Isolate 6-bit chunks of interest
1910 __ vpand(xmm0, xmm8, xmm1, Assembler::AVX_256bit);
1911
1912 // Load constants for encoding
1913 __ movl(rax, 0x19191919);
1914 __ movdl(xmm3, rax);
1915 __ vpbroadcastd(xmm3, xmm3, Assembler::AVX_256bit);
1916 __ movl(rax, 0x33333333);
1917 __ movdl(xmm4, rax);
1918 __ vpbroadcastd(xmm4, xmm4, Assembler::AVX_256bit);
1919
1920 // Shift output bytes 0 and 2 into proper lanes
1921 __ vpmulhuw(xmm2, xmm0, xmm7, Assembler::AVX_256bit);
1922
1923 // Mask and shift output bytes 1 and 3 into proper lanes and
1924 // combine
1925 __ vpand(xmm0, xmm6, xmm1, Assembler::AVX_256bit);
1926 __ vpmullw(xmm0, xmm5, xmm0, Assembler::AVX_256bit);
1927 __ vpor(xmm0, xmm0, xmm2, Assembler::AVX_256bit);
1928
1929 // Find out which are 0..25. This indicates which input
1930 // values fall in the range of 'A'-'Z', which require an
1931 // additional offset (see comments above)
1932 __ vpcmpgtb(xmm2, xmm0, xmm3, Assembler::AVX_256bit);
1933 __ vpsubusb(xmm1, xmm0, xmm4, Assembler::AVX_256bit);
1934 __ vpsubb(xmm1, xmm1, xmm2, Assembler::AVX_256bit);
1935
1936 // Load the proper lookup table
1937 __ lea(r11, ExternalAddress(StubRoutines::x86::base64_avx2_lut_addr()));
1938 __ movl(r15, isURL);
1939 __ shll(r15, 5);
1940 __ vmovdqu(xmm2, Address(r11, r15));
1941
1942 // Shuffle the offsets based on the range calculation done
1943 // above. This allows us to add the correct offset to the
1944 // 6-bit value corresponding to the range documented above.
1945 __ vpshufb(xmm1, xmm2, xmm1, Assembler::AVX_256bit);
1946 __ vpaddb(xmm0, xmm1, xmm0, Assembler::AVX_256bit);
1947
1948 // Store the encoded bytes
1949 __ vmovdqu(Address(dest, dp), xmm0);
1950 __ addl(dp, 32);
1951
1952 __ cmpl(length, 31);
1953 __ jcc(Assembler::belowEqual, L_process3);
1954
1955 __ align32();
1956 __ BIND(L_32byteLoop);
1957
1958 // Get next 32 bytes
1959 __ vmovdqu(xmm1, Address(source, start_offset, Address::times_1, -4));
1960
1961 __ subl(length, 24);
1962 __ addl(start_offset, 24);
1963
1964 // This logic is identical to the above, with only constant
1965 // register loads removed. Shuffle the input, mask off 6-bit
1966 // chunks, shift them into place, then add the offset to
1967 // encode.
1968 __ vpshufb(xmm1, xmm1, xmm9, Assembler::AVX_256bit);
1969
1970 __ vpand(xmm0, xmm8, xmm1, Assembler::AVX_256bit);
1971 __ vpmulhuw(xmm10, xmm0, xmm7, Assembler::AVX_256bit);
1972 __ vpand(xmm0, xmm6, xmm1, Assembler::AVX_256bit);
1973 __ vpmullw(xmm0, xmm5, xmm0, Assembler::AVX_256bit);
1974 __ vpor(xmm0, xmm0, xmm10, Assembler::AVX_256bit);
1975 __ vpcmpgtb(xmm10, xmm0, xmm3, Assembler::AVX_256bit);
1976 __ vpsubusb(xmm1, xmm0, xmm4, Assembler::AVX_256bit);
1977 __ vpsubb(xmm1, xmm1, xmm10, Assembler::AVX_256bit);
1978 __ vpshufb(xmm1, xmm2, xmm1, Assembler::AVX_256bit);
1979 __ vpaddb(xmm0, xmm1, xmm0, Assembler::AVX_256bit);
1980
1981 // Store the encoded bytes
1982 __ vmovdqu(Address(dest, dp), xmm0);
1983 __ addl(dp, 32);
1984
1985 __ cmpl(length, 31);
1986 __ jcc(Assembler::above, L_32byteLoop);
1987
1988 __ BIND(L_process3);
1989 __ vzeroupper();
1990 } else {
1991 __ BIND(L_process3);
1992 }
1993
1994 __ cmpl(length, 3);
1995 __ jcc(Assembler::below, L_exit);
1996
1997 // Load the encoding table based on isURL
1998 __ lea(r11, ExternalAddress(StubRoutines::x86::base64_encoding_table_addr()));
1999 __ movl(r15, isURL);
2000 __ shll(r15, 6);
2001 __ addptr(r11, r15);
2002
2003 __ BIND(L_processdata);
2004
2005 // Load 3 bytes
2006 __ load_unsigned_byte(r15, Address(source, start_offset));
2007 __ load_unsigned_byte(r10, Address(source, start_offset, Address::times_1, 1));
2008 __ load_unsigned_byte(r13, Address(source, start_offset, Address::times_1, 2));
2009
2010 // Build a 32-bit word with bytes 1, 2, 0, 1
2011 __ movl(rax, r10);
2012 __ shll(r10, 24);
2013 __ orl(rax, r10);
2014
2015 __ subl(length, 3);
2016
2017 __ shll(r15, 8);
2018 __ shll(r13, 16);
2019 __ orl(rax, r15);
2020
2021 __ addl(start_offset, 3);
2022
2023 __ orl(rax, r13);
2024 // At this point, rax contains | byte1 | byte2 | byte0 | byte1
2025 // r13 has byte2 << 16 - need low-order 6 bits to translate.
2026 // This translated byte is the fourth output byte.
2027 __ shrl(r13, 16);
2028 __ andl(r13, 0x3f);
2029
2030 // The high-order 6 bits of r15 (byte0) is translated.
2031 // The translated byte is the first output byte.
2032 __ shrl(r15, 10);
2033
2034 __ load_unsigned_byte(r13, Address(r11, r13));
2035 __ load_unsigned_byte(r15, Address(r11, r15));
2036
2037 __ movb(Address(dest, dp, Address::times_1, 3), r13);
2038
2039 // Extract high-order 4 bits of byte1 and low-order 2 bits of byte0.
2040 // This translated byte is the second output byte.
2041 __ shrl(rax, 4);
2042 __ movl(r10, rax);
2043 __ andl(rax, 0x3f);
2044
2045 __ movb(Address(dest, dp, Address::times_1, 0), r15);
2046
2047 __ load_unsigned_byte(rax, Address(r11, rax));
2048
2049 // Extract low-order 2 bits of byte1 and high-order 4 bits of byte2.
2050 // This translated byte is the third output byte.
2051 __ shrl(r10, 18);
2052 __ andl(r10, 0x3f);
2053
2054 __ load_unsigned_byte(r10, Address(r11, r10));
2055
2056 __ movb(Address(dest, dp, Address::times_1, 1), rax);
2057 __ movb(Address(dest, dp, Address::times_1, 2), r10);
2058
2059 __ addl(dp, 4);
2060 __ cmpl(length, 3);
2061 __ jcc(Assembler::aboveEqual, L_processdata);
2062
2063 __ BIND(L_exit);
2064 __ pop(r15);
2065 __ pop(r14);
2066 __ pop(r13);
2067 __ pop(r12);
2068 __ leave();
2069 __ ret(0);
2070
2071 return start;
2072 }
2073
2074 // base64 AVX512vbmi tables
2075 address StubGenerator::base64_vbmi_lookup_lo_addr() {
2076 __ align64();
2077 StubCodeMark mark(this, "StubRoutines", "lookup_lo_base64");
2078 address start = __ pc();
2079
2080 assert(((unsigned long long)start & 0x3f) == 0,
2081 "Alignment problem (0x%08llx)", (unsigned long long)start);
2082 __ emit_data64(0x8080808080808080, relocInfo::none);
2083 __ emit_data64(0x8080808080808080, relocInfo::none);
2084 __ emit_data64(0x8080808080808080, relocInfo::none);
2085 __ emit_data64(0x8080808080808080, relocInfo::none);
2086 __ emit_data64(0x8080808080808080, relocInfo::none);
2087 __ emit_data64(0x3f8080803e808080, relocInfo::none);
2088 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2089 __ emit_data64(0x8080808080803d3c, relocInfo::none);
2090
2091 return start;
2092 }
2093
2094 address StubGenerator::base64_vbmi_lookup_hi_addr() {
2095 __ align64();
2096 StubCodeMark mark(this, "StubRoutines", "lookup_hi_base64");
2097 address start = __ pc();
2098
2099 assert(((unsigned long long)start & 0x3f) == 0,
2100 "Alignment problem (0x%08llx)", (unsigned long long)start);
2101 __ emit_data64(0x0605040302010080, relocInfo::none);
2102 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2103 __ emit_data64(0x161514131211100f, relocInfo::none);
2104 __ emit_data64(0x8080808080191817, relocInfo::none);
2105 __ emit_data64(0x201f1e1d1c1b1a80, relocInfo::none);
2106 __ emit_data64(0x2827262524232221, relocInfo::none);
2107 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2108 __ emit_data64(0x8080808080333231, relocInfo::none);
2109
2110 return start;
2111 }
2112 address StubGenerator::base64_vbmi_lookup_lo_url_addr() {
2113 __ align64();
2114 StubCodeMark mark(this, "StubRoutines", "lookup_lo_base64url");
2115 address start = __ pc();
2116
2117 assert(((unsigned long long)start & 0x3f) == 0,
2118 "Alignment problem (0x%08llx)", (unsigned long long)start);
2119 __ emit_data64(0x8080808080808080, relocInfo::none);
2120 __ emit_data64(0x8080808080808080, relocInfo::none);
2121 __ emit_data64(0x8080808080808080, relocInfo::none);
2122 __ emit_data64(0x8080808080808080, relocInfo::none);
2123 __ emit_data64(0x8080808080808080, relocInfo::none);
2124 __ emit_data64(0x80803e8080808080, relocInfo::none);
2125 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2126 __ emit_data64(0x8080808080803d3c, relocInfo::none);
2127
2128 return start;
2129 }
2130
2131 address StubGenerator::base64_vbmi_lookup_hi_url_addr() {
2132 __ align64();
2133 StubCodeMark mark(this, "StubRoutines", "lookup_hi_base64url");
2134 address start = __ pc();
2135
2136 assert(((unsigned long long)start & 0x3f) == 0,
2137 "Alignment problem (0x%08llx)", (unsigned long long)start);
2138 __ emit_data64(0x0605040302010080, relocInfo::none);
2139 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2140 __ emit_data64(0x161514131211100f, relocInfo::none);
2141 __ emit_data64(0x3f80808080191817, relocInfo::none);
2142 __ emit_data64(0x201f1e1d1c1b1a80, relocInfo::none);
2143 __ emit_data64(0x2827262524232221, relocInfo::none);
2144 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2145 __ emit_data64(0x8080808080333231, relocInfo::none);
2146
2147 return start;
2148 }
2149
2150 address StubGenerator::base64_vbmi_pack_vec_addr() {
2151 __ align64();
2152 StubCodeMark mark(this, "StubRoutines", "pack_vec_base64");
2153 address start = __ pc();
2154
2155 assert(((unsigned long long)start & 0x3f) == 0,
2156 "Alignment problem (0x%08llx)", (unsigned long long)start);
2157 __ emit_data64(0x090a040506000102, relocInfo::none);
2158 __ emit_data64(0x161011120c0d0e08, relocInfo::none);
2159 __ emit_data64(0x1c1d1e18191a1415, relocInfo::none);
2160 __ emit_data64(0x292a242526202122, relocInfo::none);
2161 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2162 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2163 __ emit_data64(0x0000000000000000, relocInfo::none);
2164 __ emit_data64(0x0000000000000000, relocInfo::none);
2165
2166 return start;
2167 }
2168
2169 address StubGenerator::base64_vbmi_join_0_1_addr() {
2170 __ align64();
2171 StubCodeMark mark(this, "StubRoutines", "join_0_1_base64");
2172 address start = __ pc();
2173
2174 assert(((unsigned long long)start & 0x3f) == 0,
2175 "Alignment problem (0x%08llx)", (unsigned long long)start);
2176 __ emit_data64(0x090a040506000102, relocInfo::none);
2177 __ emit_data64(0x161011120c0d0e08, relocInfo::none);
2178 __ emit_data64(0x1c1d1e18191a1415, relocInfo::none);
2179 __ emit_data64(0x292a242526202122, relocInfo::none);
2180 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2181 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2182 __ emit_data64(0x494a444546404142, relocInfo::none);
2183 __ emit_data64(0x565051524c4d4e48, relocInfo::none);
2184
2185 return start;
2186 }
2187
2188 address StubGenerator::base64_vbmi_join_1_2_addr() {
2189 __ align64();
2190 StubCodeMark mark(this, "StubRoutines", "join_1_2_base64");
2191 address start = __ pc();
2192
2193 assert(((unsigned long long)start & 0x3f) == 0,
2194 "Alignment problem (0x%08llx)", (unsigned long long)start);
2195 __ emit_data64(0x1c1d1e18191a1415, relocInfo::none);
2196 __ emit_data64(0x292a242526202122, relocInfo::none);
2197 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2198 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2199 __ emit_data64(0x494a444546404142, relocInfo::none);
2200 __ emit_data64(0x565051524c4d4e48, relocInfo::none);
2201 __ emit_data64(0x5c5d5e58595a5455, relocInfo::none);
2202 __ emit_data64(0x696a646566606162, relocInfo::none);
2203
2204 return start;
2205 }
2206
2207 address StubGenerator::base64_vbmi_join_2_3_addr() {
2208 __ align64();
2209 StubCodeMark mark(this, "StubRoutines", "join_2_3_base64");
2210 address start = __ pc();
2211
2212 assert(((unsigned long long)start & 0x3f) == 0,
2213 "Alignment problem (0x%08llx)", (unsigned long long)start);
2214 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2215 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2216 __ emit_data64(0x494a444546404142, relocInfo::none);
2217 __ emit_data64(0x565051524c4d4e48, relocInfo::none);
2218 __ emit_data64(0x5c5d5e58595a5455, relocInfo::none);
2219 __ emit_data64(0x696a646566606162, relocInfo::none);
2220 __ emit_data64(0x767071726c6d6e68, relocInfo::none);
2221 __ emit_data64(0x7c7d7e78797a7475, relocInfo::none);
2222
2223 return start;
2224 }
2225
2226 address StubGenerator::base64_AVX2_decode_tables_addr() {
2227 __ align64();
2228 StubCodeMark mark(this, "StubRoutines", "AVX2_tables_base64");
2229 address start = __ pc();
2230
2231 assert(((unsigned long long)start & 0x3f) == 0,
2232 "Alignment problem (0x%08llx)", (unsigned long long)start);
2233 __ emit_data(0x2f2f2f2f, relocInfo::none, 0);
2234 __ emit_data(0x5f5f5f5f, relocInfo::none, 0); // for URL
2235
2236 __ emit_data(0xffffffff, relocInfo::none, 0);
2237 __ emit_data(0xfcfcfcfc, relocInfo::none, 0); // for URL
2238
2239 // Permute table
2240 __ emit_data64(0x0000000100000000, relocInfo::none);
2241 __ emit_data64(0x0000000400000002, relocInfo::none);
2242 __ emit_data64(0x0000000600000005, relocInfo::none);
2243 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2244
2245 // Shuffle table
2246 __ emit_data64(0x090a040506000102, relocInfo::none);
2247 __ emit_data64(0xffffffff0c0d0e08, relocInfo::none);
2248 __ emit_data64(0x090a040506000102, relocInfo::none);
2249 __ emit_data64(0xffffffff0c0d0e08, relocInfo::none);
2250
2251 // merge table
2252 __ emit_data(0x01400140, relocInfo::none, 0);
2253
2254 // merge multiplier
2255 __ emit_data(0x00011000, relocInfo::none, 0);
2256
2257 return start;
2258 }
2259
2260 address StubGenerator::base64_AVX2_decode_LUT_tables_addr() {
2261 __ align64();
2262 StubCodeMark mark(this, "StubRoutines", "AVX2_tables_URL_base64");
2263 address start = __ pc();
2264
2265 assert(((unsigned long long)start & 0x3f) == 0,
2266 "Alignment problem (0x%08llx)", (unsigned long long)start);
2267 // lut_lo
2268 __ emit_data64(0x1111111111111115, relocInfo::none);
2269 __ emit_data64(0x1a1b1b1b1a131111, relocInfo::none);
2270 __ emit_data64(0x1111111111111115, relocInfo::none);
2271 __ emit_data64(0x1a1b1b1b1a131111, relocInfo::none);
2272
2273 // lut_roll
2274 __ emit_data64(0xb9b9bfbf04131000, relocInfo::none);
2275 __ emit_data64(0x0000000000000000, relocInfo::none);
2276 __ emit_data64(0xb9b9bfbf04131000, relocInfo::none);
2277 __ emit_data64(0x0000000000000000, relocInfo::none);
2278
2279 // lut_lo URL
2280 __ emit_data64(0x1111111111111115, relocInfo::none);
2281 __ emit_data64(0x1b1b1a1b1b131111, relocInfo::none);
2282 __ emit_data64(0x1111111111111115, relocInfo::none);
2283 __ emit_data64(0x1b1b1a1b1b131111, relocInfo::none);
2284
2285 // lut_roll URL
2286 __ emit_data64(0xb9b9bfbf0411e000, relocInfo::none);
2287 __ emit_data64(0x0000000000000000, relocInfo::none);
2288 __ emit_data64(0xb9b9bfbf0411e000, relocInfo::none);
2289 __ emit_data64(0x0000000000000000, relocInfo::none);
2290
2291 // lut_hi
2292 __ emit_data64(0x0804080402011010, relocInfo::none);
2293 __ emit_data64(0x1010101010101010, relocInfo::none);
2294 __ emit_data64(0x0804080402011010, relocInfo::none);
2295 __ emit_data64(0x1010101010101010, relocInfo::none);
2296
2297 return start;
2298 }
2299
2300 address StubGenerator::base64_decoding_table_addr() {
2301 StubCodeMark mark(this, "StubRoutines", "decoding_table_base64");
2302 address start = __ pc();
2303
2304 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2305 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2306 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2307 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2308 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2309 __ emit_data64(0x3fffffff3effffff, relocInfo::none);
2310 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2311 __ emit_data64(0xffffffffffff3d3c, relocInfo::none);
2312 __ emit_data64(0x06050403020100ff, relocInfo::none);
2313 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2314 __ emit_data64(0x161514131211100f, relocInfo::none);
2315 __ emit_data64(0xffffffffff191817, relocInfo::none);
2316 __ emit_data64(0x201f1e1d1c1b1aff, relocInfo::none);
2317 __ emit_data64(0x2827262524232221, relocInfo::none);
2318 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2319 __ emit_data64(0xffffffffff333231, relocInfo::none);
2320 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2321 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2322 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2323 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2324 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2325 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2326 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2327 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2328 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2329 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2330 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2331 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2332 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2333 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2334 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2335 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2336
2337 // URL table
2338 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2339 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2340 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2341 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2342 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2343 __ emit_data64(0xffff3effffffffff, relocInfo::none);
2344 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2345 __ emit_data64(0xffffffffffff3d3c, relocInfo::none);
2346 __ emit_data64(0x06050403020100ff, relocInfo::none);
2347 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2348 __ emit_data64(0x161514131211100f, relocInfo::none);
2349 __ emit_data64(0x3fffffffff191817, relocInfo::none);
2350 __ emit_data64(0x201f1e1d1c1b1aff, relocInfo::none);
2351 __ emit_data64(0x2827262524232221, relocInfo::none);
2352 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2353 __ emit_data64(0xffffffffff333231, relocInfo::none);
2354 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2355 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2356 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2357 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2358 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2359 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2360 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2361 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2362 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2363 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2364 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2365 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2366 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2367 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2368 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2369 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2370
2371 return start;
2372 }
2373
2374
2375 // Code for generating Base64 decoding.
2376 //
2377 // Based on the article (and associated code) from https://arxiv.org/abs/1910.05109.
2378 //
2379 // Intrinsic function prototype in Base64.java:
2380 // private void decodeBlock(byte[] src, int sp, int sl, byte[] dst, int dp, boolean isURL, isMIME) {
2381 address StubGenerator::generate_base64_decodeBlock() {
2382 __ align(CodeEntryAlignment);
2383 StubCodeMark mark(this, "StubRoutines", "implDecode");
2384 address start = __ pc();
2385
2386 __ enter();
2387
2388 // Save callee-saved registers before using them
2389 __ push(r12);
2390 __ push(r13);
2391 __ push(r14);
2392 __ push(r15);
2393 __ push(rbx);
2394
2395 // arguments
2396 const Register source = c_rarg0; // Source Array
2397 const Register start_offset = c_rarg1; // start offset
2398 const Register end_offset = c_rarg2; // end offset
2399 const Register dest = c_rarg3; // destination array
2400 const Register isMIME = rbx;
2401
2402 #ifndef _WIN64
2403 const Register dp = c_rarg4; // Position for writing to dest array
2404 const Register isURL = c_rarg5;// Base64 or URL character set
2405 __ movl(isMIME, Address(rbp, 2 * wordSize));
2406 #else
2407 const Address dp_mem(rbp, 6 * wordSize); // length is on stack on Win64
2408 const Address isURL_mem(rbp, 7 * wordSize);
2409 const Register isURL = r10; // pick the volatile windows register
2410 const Register dp = r12;
2411 __ movl(dp, dp_mem);
2412 __ movl(isURL, isURL_mem);
2413 __ movl(isMIME, Address(rbp, 8 * wordSize));
2414 #endif
2415
2416 const XMMRegister lookup_lo = xmm5;
2417 const XMMRegister lookup_hi = xmm6;
2418 const XMMRegister errorvec = xmm7;
2419 const XMMRegister pack16_op = xmm9;
2420 const XMMRegister pack32_op = xmm8;
2421 const XMMRegister input0 = xmm3;
2422 const XMMRegister input1 = xmm20;
2423 const XMMRegister input2 = xmm21;
2424 const XMMRegister input3 = xmm19;
2425 const XMMRegister join01 = xmm12;
2426 const XMMRegister join12 = xmm11;
2427 const XMMRegister join23 = xmm10;
2428 const XMMRegister translated0 = xmm2;
2429 const XMMRegister translated1 = xmm1;
2430 const XMMRegister translated2 = xmm0;
2431 const XMMRegister translated3 = xmm4;
2432
2433 const XMMRegister merged0 = xmm2;
2434 const XMMRegister merged1 = xmm1;
2435 const XMMRegister merged2 = xmm0;
2436 const XMMRegister merged3 = xmm4;
2437 const XMMRegister merge_ab_bc0 = xmm2;
2438 const XMMRegister merge_ab_bc1 = xmm1;
2439 const XMMRegister merge_ab_bc2 = xmm0;
2440 const XMMRegister merge_ab_bc3 = xmm4;
2441
2442 const XMMRegister pack24bits = xmm4;
2443
2444 const Register length = r14;
2445 const Register output_size = r13;
2446 const Register output_mask = r15;
2447 const KRegister input_mask = k1;
2448
2449 const XMMRegister input_initial_valid_b64 = xmm0;
2450 const XMMRegister tmp = xmm10;
2451 const XMMRegister mask = xmm0;
2452 const XMMRegister invalid_b64 = xmm1;
2453
2454 Label L_process256, L_process64, L_process64Loop, L_exit, L_processdata, L_loadURL;
2455 Label L_continue, L_finalBit, L_padding, L_donePadding, L_bruteForce;
2456 Label L_forceLoop, L_bottomLoop, L_checkMIME, L_exit_no_vzero, L_lastChunk;
2457
2458 // calculate length from offsets
2459 __ movl(length, end_offset);
2460 __ subl(length, start_offset);
2461 __ push(dest); // Save for return value calc
2462
2463 // If AVX512 VBMI not supported, just compile non-AVX code
2464 if(VM_Version::supports_avx512_vbmi() &&
2465 VM_Version::supports_avx512bw()) {
2466 __ cmpl(length, 31); // 32-bytes is break-even for AVX-512
2467 __ jcc(Assembler::lessEqual, L_lastChunk);
2468
2469 __ cmpl(isMIME, 0);
2470 __ jcc(Assembler::notEqual, L_lastChunk);
2471
2472 // Load lookup tables based on isURL
2473 __ cmpl(isURL, 0);
2474 __ jcc(Assembler::notZero, L_loadURL);
2475
2476 __ evmovdquq(lookup_lo, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_lo_addr()), Assembler::AVX_512bit, r13);
2477 __ evmovdquq(lookup_hi, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_hi_addr()), Assembler::AVX_512bit, r13);
2478
2479 __ BIND(L_continue);
2480
2481 __ movl(r15, 0x01400140);
2482 __ evpbroadcastd(pack16_op, r15, Assembler::AVX_512bit);
2483
2484 __ movl(r15, 0x00011000);
2485 __ evpbroadcastd(pack32_op, r15, Assembler::AVX_512bit);
2486
2487 __ cmpl(length, 0xff);
2488 __ jcc(Assembler::lessEqual, L_process64);
2489
2490 // load masks required for decoding data
2491 __ BIND(L_processdata);
2492 __ evmovdquq(join01, ExternalAddress(StubRoutines::x86::base64_vbmi_join_0_1_addr()), Assembler::AVX_512bit,r13);
2493 __ evmovdquq(join12, ExternalAddress(StubRoutines::x86::base64_vbmi_join_1_2_addr()), Assembler::AVX_512bit, r13);
2494 __ evmovdquq(join23, ExternalAddress(StubRoutines::x86::base64_vbmi_join_2_3_addr()), Assembler::AVX_512bit, r13);
2495
2496 __ align32();
2497 __ BIND(L_process256);
2498 // Grab input data
2499 __ evmovdquq(input0, Address(source, start_offset, Address::times_1, 0x00), Assembler::AVX_512bit);
2500 __ evmovdquq(input1, Address(source, start_offset, Address::times_1, 0x40), Assembler::AVX_512bit);
2501 __ evmovdquq(input2, Address(source, start_offset, Address::times_1, 0x80), Assembler::AVX_512bit);
2502 __ evmovdquq(input3, Address(source, start_offset, Address::times_1, 0xc0), Assembler::AVX_512bit);
2503
2504 // Copy the low part of the lookup table into the destination of the permutation
2505 __ evmovdquq(translated0, lookup_lo, Assembler::AVX_512bit);
2506 __ evmovdquq(translated1, lookup_lo, Assembler::AVX_512bit);
2507 __ evmovdquq(translated2, lookup_lo, Assembler::AVX_512bit);
2508 __ evmovdquq(translated3, lookup_lo, Assembler::AVX_512bit);
2509
2510 // Translate the base64 input into "decoded" bytes
2511 __ evpermt2b(translated0, input0, lookup_hi, Assembler::AVX_512bit);
2512 __ evpermt2b(translated1, input1, lookup_hi, Assembler::AVX_512bit);
2513 __ evpermt2b(translated2, input2, lookup_hi, Assembler::AVX_512bit);
2514 __ evpermt2b(translated3, input3, lookup_hi, Assembler::AVX_512bit);
2515
2516 // OR all of the translations together to check for errors (high-order bit of byte set)
2517 __ vpternlogd(input0, 0xfe, input1, input2, Assembler::AVX_512bit);
2518
2519 __ vpternlogd(input3, 0xfe, translated0, translated1, Assembler::AVX_512bit);
2520 __ vpternlogd(input0, 0xfe, translated2, translated3, Assembler::AVX_512bit);
2521 __ vpor(errorvec, input3, input0, Assembler::AVX_512bit);
2522
2523 // Check if there was an error - if so, try 64-byte chunks
2524 __ evpmovb2m(k3, errorvec, Assembler::AVX_512bit);
2525 __ kortestql(k3, k3);
2526 __ jcc(Assembler::notZero, L_process64);
2527
2528 // The merging and shuffling happens here
2529 // We multiply each byte pair [00dddddd | 00cccccc | 00bbbbbb | 00aaaaaa]
2530 // Multiply [00cccccc] by 2^6 added to [00dddddd] to get [0000cccc | ccdddddd]
2531 // The pack16_op is a vector of 0x01400140, so multiply D by 1 and C by 0x40
2532 __ vpmaddubsw(merge_ab_bc0, translated0, pack16_op, Assembler::AVX_512bit);
2533 __ vpmaddubsw(merge_ab_bc1, translated1, pack16_op, Assembler::AVX_512bit);
2534 __ vpmaddubsw(merge_ab_bc2, translated2, pack16_op, Assembler::AVX_512bit);
2535 __ vpmaddubsw(merge_ab_bc3, translated3, pack16_op, Assembler::AVX_512bit);
2536
2537 // Now do the same with packed 16-bit values.
2538 // We start with [0000cccc | ccdddddd | 0000aaaa | aabbbbbb]
2539 // pack32_op is 0x00011000 (2^12, 1), so this multiplies [0000aaaa | aabbbbbb] by 2^12
2540 // and adds [0000cccc | ccdddddd] to yield [00000000 | aaaaaabb | bbbbcccc | ccdddddd]
2541 __ vpmaddwd(merged0, merge_ab_bc0, pack32_op, Assembler::AVX_512bit);
2542 __ vpmaddwd(merged1, merge_ab_bc1, pack32_op, Assembler::AVX_512bit);
2543 __ vpmaddwd(merged2, merge_ab_bc2, pack32_op, Assembler::AVX_512bit);
2544 __ vpmaddwd(merged3, merge_ab_bc3, pack32_op, Assembler::AVX_512bit);
2545
2546 // The join vectors specify which byte from which vector goes into the outputs
2547 // One of every 4 bytes in the extended vector is zero, so we pack them into their
2548 // final positions in the register for storing (256 bytes in, 192 bytes out)
2549 __ evpermt2b(merged0, join01, merged1, Assembler::AVX_512bit);
2550 __ evpermt2b(merged1, join12, merged2, Assembler::AVX_512bit);
2551 __ evpermt2b(merged2, join23, merged3, Assembler::AVX_512bit);
2552
2553 // Store result
2554 __ evmovdquq(Address(dest, dp, Address::times_1, 0x00), merged0, Assembler::AVX_512bit);
2555 __ evmovdquq(Address(dest, dp, Address::times_1, 0x40), merged1, Assembler::AVX_512bit);
2556 __ evmovdquq(Address(dest, dp, Address::times_1, 0x80), merged2, Assembler::AVX_512bit);
2557
2558 __ addptr(source, 0x100);
2559 __ addptr(dest, 0xc0);
2560 __ subl(length, 0x100);
2561 __ cmpl(length, 64 * 4);
2562 __ jcc(Assembler::greaterEqual, L_process256);
2563
2564 // At this point, we've decoded 64 * 4 * n bytes.
2565 // The remaining length will be <= 64 * 4 - 1.
2566 // UNLESS there was an error decoding the first 256-byte chunk. In this
2567 // case, the length will be arbitrarily long.
2568 //
2569 // Note that this will be the path for MIME-encoded strings.
2570
2571 __ BIND(L_process64);
2572
2573 __ evmovdquq(pack24bits, ExternalAddress(StubRoutines::x86::base64_vbmi_pack_vec_addr()), Assembler::AVX_512bit, r13);
2574
2575 __ cmpl(length, 63);
2576 __ jcc(Assembler::lessEqual, L_finalBit);
2577
2578 __ mov64(rax, 0x0000ffffffffffff);
2579 __ kmovql(k2, rax);
2580
2581 __ align32();
2582 __ BIND(L_process64Loop);
2583
2584 // Handle first 64-byte block
2585
2586 __ evmovdquq(input0, Address(source, start_offset), Assembler::AVX_512bit);
2587 __ evmovdquq(translated0, lookup_lo, Assembler::AVX_512bit);
2588 __ evpermt2b(translated0, input0, lookup_hi, Assembler::AVX_512bit);
2589
2590 __ vpor(errorvec, translated0, input0, Assembler::AVX_512bit);
2591
2592 // Check for error and bomb out before updating dest
2593 __ evpmovb2m(k3, errorvec, Assembler::AVX_512bit);
2594 __ kortestql(k3, k3);
2595 __ jcc(Assembler::notZero, L_exit);
2596
2597 // Pack output register, selecting correct byte ordering
2598 __ vpmaddubsw(merge_ab_bc0, translated0, pack16_op, Assembler::AVX_512bit);
2599 __ vpmaddwd(merged0, merge_ab_bc0, pack32_op, Assembler::AVX_512bit);
2600 __ vpermb(merged0, pack24bits, merged0, Assembler::AVX_512bit);
2601
2602 __ evmovdqub(Address(dest, dp), k2, merged0, true, Assembler::AVX_512bit);
2603
2604 __ subl(length, 64);
2605 __ addptr(source, 64);
2606 __ addptr(dest, 48);
2607
2608 __ cmpl(length, 64);
2609 __ jcc(Assembler::greaterEqual, L_process64Loop);
2610
2611 __ cmpl(length, 0);
2612 __ jcc(Assembler::lessEqual, L_exit);
2613
2614 __ BIND(L_finalBit);
2615 // Now have 1 to 63 bytes left to decode
2616
2617 // I was going to let Java take care of the final fragment
2618 // however it will repeatedly call this routine for every 4 bytes
2619 // of input data, so handle the rest here.
2620 __ movq(rax, -1);
2621 __ bzhiq(rax, rax, length); // Input mask in rax
2622
2623 __ movl(output_size, length);
2624 __ shrl(output_size, 2); // Find (len / 4) * 3 (output length)
2625 __ lea(output_size, Address(output_size, output_size, Address::times_2, 0));
2626 // output_size in r13
2627
2628 // Strip pad characters, if any, and adjust length and mask
2629 __ addq(length, start_offset);
2630 __ cmpb(Address(source, length, Address::times_1, -1), '=');
2631 __ jcc(Assembler::equal, L_padding);
2632
2633 __ BIND(L_donePadding);
2634 __ subq(length, start_offset);
2635
2636 // Output size is (64 - output_size), output mask is (all 1s >> output_size).
2637 __ kmovql(input_mask, rax);
2638 __ movq(output_mask, -1);
2639 __ bzhiq(output_mask, output_mask, output_size);
2640
2641 // Load initial input with all valid base64 characters. Will be used
2642 // in merging source bytes to avoid masking when determining if an error occurred.
2643 __ movl(rax, 0x61616161);
2644 __ evpbroadcastd(input_initial_valid_b64, rax, Assembler::AVX_512bit);
2645
2646 // A register containing all invalid base64 decoded values
2647 __ movl(rax, 0x80808080);
2648 __ evpbroadcastd(invalid_b64, rax, Assembler::AVX_512bit);
2649
2650 // input_mask is in k1
2651 // output_size is in r13
2652 // output_mask is in r15
2653 // zmm0 - free
2654 // zmm1 - 0x00011000
2655 // zmm2 - 0x01400140
2656 // zmm3 - errorvec
2657 // zmm4 - pack vector
2658 // zmm5 - lookup_lo
2659 // zmm6 - lookup_hi
2660 // zmm7 - errorvec
2661 // zmm8 - 0x61616161
2662 // zmm9 - 0x80808080
2663
2664 // Load only the bytes from source, merging into our "fully-valid" register
2665 __ evmovdqub(input_initial_valid_b64, input_mask, Address(source, start_offset, Address::times_1, 0x0), true, Assembler::AVX_512bit);
2666
2667 // Decode all bytes within our merged input
2668 __ evmovdquq(tmp, lookup_lo, Assembler::AVX_512bit);
2669 __ evpermt2b(tmp, input_initial_valid_b64, lookup_hi, Assembler::AVX_512bit);
2670 __ evporq(mask, tmp, input_initial_valid_b64, Assembler::AVX_512bit);
2671
2672 // Check for error. Compare (decoded | initial) to all invalid.
2673 // If any bytes have their high-order bit set, then we have an error.
2674 __ evptestmb(k2, mask, invalid_b64, Assembler::AVX_512bit);
2675 __ kortestql(k2, k2);
2676
2677 // If we have an error, use the brute force loop to decode what we can (4-byte chunks).
2678 __ jcc(Assembler::notZero, L_bruteForce);
2679
2680 // Shuffle output bytes
2681 __ vpmaddubsw(tmp, tmp, pack16_op, Assembler::AVX_512bit);
2682 __ vpmaddwd(tmp, tmp, pack32_op, Assembler::AVX_512bit);
2683
2684 __ vpermb(tmp, pack24bits, tmp, Assembler::AVX_512bit);
2685 __ kmovql(k1, output_mask);
2686 __ evmovdqub(Address(dest, dp), k1, tmp, true, Assembler::AVX_512bit);
2687
2688 __ addptr(dest, output_size);
2689
2690 __ BIND(L_exit);
2691 __ vzeroupper();
2692 __ pop(rax); // Get original dest value
2693 __ subptr(dest, rax); // Number of bytes converted
2694 __ movptr(rax, dest);
2695 __ pop(rbx);
2696 __ pop(r15);
2697 __ pop(r14);
2698 __ pop(r13);
2699 __ pop(r12);
2700 __ leave();
2701 __ ret(0);
2702
2703 __ BIND(L_loadURL);
2704 __ evmovdquq(lookup_lo, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_lo_url_addr()), Assembler::AVX_512bit, r13);
2705 __ evmovdquq(lookup_hi, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_hi_url_addr()), Assembler::AVX_512bit, r13);
2706 __ jmp(L_continue);
2707
2708 __ BIND(L_padding);
2709 __ decrementq(output_size, 1);
2710 __ shrq(rax, 1);
2711
2712 __ cmpb(Address(source, length, Address::times_1, -2), '=');
2713 __ jcc(Assembler::notEqual, L_donePadding);
2714
2715 __ decrementq(output_size, 1);
2716 __ shrq(rax, 1);
2717 __ jmp(L_donePadding);
2718
2719 __ align32();
2720 __ BIND(L_bruteForce);
2721 } // End of if(avx512_vbmi)
2722
2723 if (VM_Version::supports_avx2()) {
2724 Label L_tailProc, L_topLoop, L_enterLoop;
2725
2726 __ cmpl(isMIME, 0);
2727 __ jcc(Assembler::notEqual, L_lastChunk);
2728
2729 // Check for buffer too small (for algorithm)
2730 __ subl(length, 0x2c);
2731 __ jcc(Assembler::less, L_tailProc);
2732
2733 __ shll(isURL, 2);
2734
2735 // Algorithm adapted from https://arxiv.org/abs/1704.00605, "Faster Base64
2736 // Encoding and Decoding using AVX2 Instructions". URL modifications added.
2737
2738 // Set up constants
2739 __ lea(r13, ExternalAddress(StubRoutines::x86::base64_AVX2_decode_tables_addr()));
2740 __ vpbroadcastd(xmm4, Address(r13, isURL, Address::times_1), Assembler::AVX_256bit); // 2F or 5F
2741 __ vpbroadcastd(xmm10, Address(r13, isURL, Address::times_1, 0x08), Assembler::AVX_256bit); // -1 or -4
2742 __ vmovdqu(xmm12, Address(r13, 0x10)); // permute
2743 __ vmovdqu(xmm13, Address(r13, 0x30)); // shuffle
2744 __ vpbroadcastd(xmm7, Address(r13, 0x50), Assembler::AVX_256bit); // merge
2745 __ vpbroadcastd(xmm6, Address(r13, 0x54), Assembler::AVX_256bit); // merge mult
2746
2747 __ lea(r13, ExternalAddress(StubRoutines::x86::base64_AVX2_decode_LUT_tables_addr()));
2748 __ shll(isURL, 4);
2749 __ vmovdqu(xmm11, Address(r13, isURL, Address::times_1, 0x00)); // lut_lo
2750 __ vmovdqu(xmm8, Address(r13, isURL, Address::times_1, 0x20)); // lut_roll
2751 __ shrl(isURL, 6); // restore isURL
2752 __ vmovdqu(xmm9, Address(r13, 0x80)); // lut_hi
2753 __ jmp(L_enterLoop);
2754
2755 __ align32();
2756 __ bind(L_topLoop);
2757 // Add in the offset value (roll) to get 6-bit out values
2758 __ vpaddb(xmm0, xmm0, xmm2, Assembler::AVX_256bit);
2759 // Merge and permute the output bits into appropriate output byte lanes
2760 __ vpmaddubsw(xmm0, xmm0, xmm7, Assembler::AVX_256bit);
2761 __ vpmaddwd(xmm0, xmm0, xmm6, Assembler::AVX_256bit);
2762 __ vpshufb(xmm0, xmm0, xmm13, Assembler::AVX_256bit);
2763 __ vpermd(xmm0, xmm12, xmm0, Assembler::AVX_256bit);
2764 // Store the output bytes
2765 __ vmovdqu(Address(dest, dp, Address::times_1, 0), xmm0);
2766 __ addptr(source, 0x20);
2767 __ addptr(dest, 0x18);
2768 __ subl(length, 0x20);
2769 __ jcc(Assembler::less, L_tailProc);
2770
2771 __ bind(L_enterLoop);
2772
2773 // Load in encoded string (32 bytes)
2774 __ vmovdqu(xmm2, Address(source, start_offset, Address::times_1, 0x0));
2775 // Extract the high nibble for indexing into the lut tables. High 4 bits are don't care.
2776 __ vpsrld(xmm1, xmm2, 0x4, Assembler::AVX_256bit);
2777 __ vpand(xmm1, xmm4, xmm1, Assembler::AVX_256bit);
2778 // Extract the low nibble. 5F/2F will isolate the low-order 4 bits. High 4 bits are don't care.
2779 __ vpand(xmm3, xmm2, xmm4, Assembler::AVX_256bit);
2780 // Check for special-case (0x2F or 0x5F (URL))
2781 __ vpcmpeqb(xmm0, xmm4, xmm2, Assembler::AVX_256bit);
2782 // Get the bitset based on the low nibble. vpshufb uses low-order 4 bits only.
2783 __ vpshufb(xmm3, xmm11, xmm3, Assembler::AVX_256bit);
2784 // Get the bit value of the high nibble
2785 __ vpshufb(xmm5, xmm9, xmm1, Assembler::AVX_256bit);
2786 // Make sure 2F / 5F shows as valid
2787 __ vpandn(xmm3, xmm0, xmm3, Assembler::AVX_256bit);
2788 // Make adjustment for roll index. For non-URL, this is a no-op,
2789 // for URL, this adjusts by -4. This is to properly index the
2790 // roll value for 2F / 5F.
2791 __ vpand(xmm0, xmm0, xmm10, Assembler::AVX_256bit);
2792 // If the and of the two is non-zero, we have an invalid input character
2793 __ vptest(xmm3, xmm5);
2794 // Extract the "roll" value - value to add to the input to get 6-bit out value
2795 __ vpaddb(xmm0, xmm0, xmm1, Assembler::AVX_256bit); // Handle 2F / 5F
2796 __ vpshufb(xmm0, xmm8, xmm0, Assembler::AVX_256bit);
2797 __ jcc(Assembler::equal, L_topLoop); // Fall through on error
2798
2799 __ bind(L_tailProc);
2800
2801 __ addl(length, 0x2c);
2802
2803 __ vzeroupper();
2804 }
2805
2806 // Use non-AVX code to decode 4-byte chunks into 3 bytes of output
2807
2808 // Register state (Linux):
2809 // r12-15 - saved on stack
2810 // rdi - src
2811 // rsi - sp
2812 // rdx - sl
2813 // rcx - dst
2814 // r8 - dp
2815 // r9 - isURL
2816
2817 // Register state (Windows):
2818 // r12-15 - saved on stack
2819 // rcx - src
2820 // rdx - sp
2821 // r8 - sl
2822 // r9 - dst
2823 // r12 - dp
2824 // r10 - isURL
2825
2826 // Registers (common):
2827 // length (r14) - bytes in src
2828
2829 const Register decode_table = r11;
2830 const Register out_byte_count = rbx;
2831 const Register byte1 = r13;
2832 const Register byte2 = r15;
2833 const Register byte3 = WIN64_ONLY(r8) NOT_WIN64(rdx);
2834 const Register byte4 = WIN64_ONLY(r10) NOT_WIN64(r9);
2835
2836 __ bind(L_lastChunk);
2837
2838 __ shrl(length, 2); // Multiple of 4 bytes only - length is # 4-byte chunks
2839 __ cmpl(length, 0);
2840 __ jcc(Assembler::lessEqual, L_exit_no_vzero);
2841
2842 __ shll(isURL, 8); // index into decode table based on isURL
2843 __ lea(decode_table, ExternalAddress(StubRoutines::x86::base64_decoding_table_addr()));
2844 __ addptr(decode_table, isURL);
2845
2846 __ jmp(L_bottomLoop);
2847
2848 __ align32();
2849 __ BIND(L_forceLoop);
2850 __ shll(byte1, 18);
2851 __ shll(byte2, 12);
2852 __ shll(byte3, 6);
2853 __ orl(byte1, byte2);
2854 __ orl(byte1, byte3);
2855 __ orl(byte1, byte4);
2856
2857 __ addptr(source, 4);
2858
2859 __ movb(Address(dest, dp, Address::times_1, 2), byte1);
2860 __ shrl(byte1, 8);
2861 __ movb(Address(dest, dp, Address::times_1, 1), byte1);
2862 __ shrl(byte1, 8);
2863 __ movb(Address(dest, dp, Address::times_1, 0), byte1);
2864
2865 __ addptr(dest, 3);
2866 __ decrementl(length, 1);
2867 __ jcc(Assembler::zero, L_exit_no_vzero);
2868
2869 __ BIND(L_bottomLoop);
2870 __ load_unsigned_byte(byte1, Address(source, start_offset, Address::times_1, 0x00));
2871 __ load_unsigned_byte(byte2, Address(source, start_offset, Address::times_1, 0x01));
2872 __ load_signed_byte(byte1, Address(decode_table, byte1));
2873 __ load_signed_byte(byte2, Address(decode_table, byte2));
2874 __ load_unsigned_byte(byte3, Address(source, start_offset, Address::times_1, 0x02));
2875 __ load_unsigned_byte(byte4, Address(source, start_offset, Address::times_1, 0x03));
2876 __ load_signed_byte(byte3, Address(decode_table, byte3));
2877 __ load_signed_byte(byte4, Address(decode_table, byte4));
2878
2879 __ mov(rax, byte1);
2880 __ orl(rax, byte2);
2881 __ orl(rax, byte3);
2882 __ orl(rax, byte4);
2883 __ jcc(Assembler::positive, L_forceLoop);
2884
2885 __ BIND(L_exit_no_vzero);
2886 __ pop(rax); // Get original dest value
2887 __ subptr(dest, rax); // Number of bytes converted
2888 __ movptr(rax, dest);
2889 __ pop(rbx);
2890 __ pop(r15);
2891 __ pop(r14);
2892 __ pop(r13);
2893 __ pop(r12);
2894 __ leave();
2895 __ ret(0);
2896
2897 return start;
2898 }
2899
2900
2901 /**
2902 * Arguments:
2903 *
2904 * Inputs:
2905 * c_rarg0 - int crc
2906 * c_rarg1 - byte* buf
2907 * c_rarg2 - int length
2908 *
2909 * Output:
2910 * rax - int crc result
2911 */
2912 address StubGenerator::generate_updateBytesCRC32() {
2913 assert(UseCRC32Intrinsics, "need AVX and CLMUL instructions");
2914
2915 __ align(CodeEntryAlignment);
2916 StubCodeMark mark(this, "StubRoutines", "updateBytesCRC32");
2917
2918 address start = __ pc();
2919
2920 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
2921 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
2922 // rscratch1: r10
2923 const Register crc = c_rarg0; // crc
2924 const Register buf = c_rarg1; // source java byte array address
2925 const Register len = c_rarg2; // length
2926 const Register table = c_rarg3; // crc_table address (reuse register)
2927 const Register tmp1 = r11;
2928 const Register tmp2 = r10;
2929 assert_different_registers(crc, buf, len, table, tmp1, tmp2, rax);
2930
2931 BLOCK_COMMENT("Entry:");
2932 __ enter(); // required for proper stackwalking of RuntimeStub frame
2933
2934 if (VM_Version::supports_sse4_1() && VM_Version::supports_avx512_vpclmulqdq() &&
2935 VM_Version::supports_avx512bw() &&
2936 VM_Version::supports_avx512vl()) {
2937 // The constants used in the CRC32 algorithm requires the 1's compliment of the initial crc value.
2938 // However, the constant table for CRC32-C assumes the original crc value. Account for this
2939 // difference before calling and after returning.
2940 __ lea(table, ExternalAddress(StubRoutines::x86::crc_table_avx512_addr()));
2941 __ notl(crc);
2942 __ kernel_crc32_avx512(crc, buf, len, table, tmp1, tmp2);
2943 __ notl(crc);
2944 } else {
2945 __ kernel_crc32(crc, buf, len, table, tmp1);
2946 }
2947
2948 __ movl(rax, crc);
2949 __ vzeroupper();
2950 __ leave(); // required for proper stackwalking of RuntimeStub frame
2951 __ ret(0);
2952
2953 return start;
2954 }
2955
2956 /**
2957 * Arguments:
2958 *
2959 * Inputs:
2960 * c_rarg0 - int crc
2961 * c_rarg1 - byte* buf
2962 * c_rarg2 - long length
2963 * c_rarg3 - table_start - optional (present only when doing a library_call,
2964 * not used by x86 algorithm)
2965 *
2966 * Output:
2967 * rax - int crc result
2968 */
2969 address StubGenerator::generate_updateBytesCRC32C(bool is_pclmulqdq_supported) {
2970 assert(UseCRC32CIntrinsics, "need SSE4_2");
2971 __ align(CodeEntryAlignment);
2972 StubCodeMark mark(this, "StubRoutines", "updateBytesCRC32C");
2973 address start = __ pc();
2974
2975 //reg.arg int#0 int#1 int#2 int#3 int#4 int#5 float regs
2976 //Windows RCX RDX R8 R9 none none XMM0..XMM3
2977 //Lin / Sol RDI RSI RDX RCX R8 R9 XMM0..XMM7
2978 const Register crc = c_rarg0; // crc
2979 const Register buf = c_rarg1; // source java byte array address
2980 const Register len = c_rarg2; // length
2981 const Register a = rax;
2982 const Register j = r9;
2983 const Register k = r10;
2984 const Register l = r11;
2985 #ifdef _WIN64
2986 const Register y = rdi;
2987 const Register z = rsi;
2988 #else
2989 const Register y = rcx;
2990 const Register z = r8;
2991 #endif
2992 assert_different_registers(crc, buf, len, a, j, k, l, y, z);
2993
2994 BLOCK_COMMENT("Entry:");
2995 __ enter(); // required for proper stackwalking of RuntimeStub frame
2996 Label L_continue;
2997
2998 if (VM_Version::supports_sse4_1() && VM_Version::supports_avx512_vpclmulqdq() &&
2999 VM_Version::supports_avx512bw() &&
3000 VM_Version::supports_avx512vl()) {
3001 Label L_doSmall;
3002
3003 __ cmpl(len, 384);
3004 __ jcc(Assembler::lessEqual, L_doSmall);
3005
3006 __ lea(j, ExternalAddress(StubRoutines::x86::crc32c_table_avx512_addr()));
3007 __ kernel_crc32_avx512(crc, buf, len, j, l, k);
3008
3009 __ jmp(L_continue);
3010
3011 __ bind(L_doSmall);
3012 }
3013 #ifdef _WIN64
3014 __ push(y);
3015 __ push(z);
3016 #endif
3017 __ crc32c_ipl_alg2_alt2(crc, buf, len,
3018 a, j, k,
3019 l, y, z,
3020 c_farg0, c_farg1, c_farg2,
3021 is_pclmulqdq_supported);
3022 #ifdef _WIN64
3023 __ pop(z);
3024 __ pop(y);
3025 #endif
3026
3027 __ bind(L_continue);
3028 __ movl(rax, crc);
3029 __ vzeroupper();
3030 __ leave(); // required for proper stackwalking of RuntimeStub frame
3031 __ ret(0);
3032
3033 return start;
3034 }
3035
3036
3037 /**
3038 * Arguments:
3039 *
3040 * Input:
3041 * c_rarg0 - x address
3042 * c_rarg1 - x length
3043 * c_rarg2 - y address
3044 * c_rarg3 - y length
3045 * not Win64
3046 * c_rarg4 - z address
3047 * Win64
3048 * rsp+40 - z address
3049 */
3050 address StubGenerator::generate_multiplyToLen() {
3051 __ align(CodeEntryAlignment);
3052 StubCodeMark mark(this, "StubRoutines", "multiplyToLen");
3053 address start = __ pc();
3054
3055 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
3056 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
3057 const Register x = rdi;
3058 const Register xlen = rax;
3059 const Register y = rsi;
3060 const Register ylen = rcx;
3061 const Register z = r8;
3062
3063 // Next registers will be saved on stack in multiply_to_len().
3064 const Register tmp0 = r11;
3065 const Register tmp1 = r12;
3066 const Register tmp2 = r13;
3067 const Register tmp3 = r14;
3068 const Register tmp4 = r15;
3069 const Register tmp5 = rbx;
3070
3071 BLOCK_COMMENT("Entry:");
3072 __ enter(); // required for proper stackwalking of RuntimeStub frame
3073
3074 setup_arg_regs(4); // x => rdi, xlen => rsi, y => rdx
3075 // ylen => rcx, z => r8
3076 // r9 and r10 may be used to save non-volatile registers
3077 #ifdef _WIN64
3078 // last argument (#4) is on stack on Win64
3079 __ movptr(z, Address(rsp, 6 * wordSize));
3080 #endif
3081
3082 __ movptr(xlen, rsi);
3083 __ movptr(y, rdx);
3084 __ multiply_to_len(x, xlen, y, ylen, z, tmp0, tmp1, tmp2, tmp3, tmp4, tmp5);
3085
3086 restore_arg_regs();
3087
3088 __ leave(); // required for proper stackwalking of RuntimeStub frame
3089 __ ret(0);
3090
3091 return start;
3092 }
3093
3094 /**
3095 * Arguments:
3096 *
3097 * Input:
3098 * c_rarg0 - obja address
3099 * c_rarg1 - objb address
3100 * c_rarg3 - length length
3101 * c_rarg4 - scale log2_array_indxscale
3102 *
3103 * Output:
3104 * rax - int >= mismatched index, < 0 bitwise complement of tail
3105 */
3106 address StubGenerator::generate_vectorizedMismatch() {
3107 __ align(CodeEntryAlignment);
3108 StubCodeMark mark(this, "StubRoutines", "vectorizedMismatch");
3109 address start = __ pc();
3110
3111 BLOCK_COMMENT("Entry:");
3112 __ enter();
3113
3114 #ifdef _WIN64 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
3115 const Register scale = c_rarg0; //rcx, will exchange with r9
3116 const Register objb = c_rarg1; //rdx
3117 const Register length = c_rarg2; //r8
3118 const Register obja = c_rarg3; //r9
3119 __ xchgq(obja, scale); //now obja and scale contains the correct contents
3120
3121 const Register tmp1 = r10;
3122 const Register tmp2 = r11;
3123 #endif
3124 #ifndef _WIN64 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
3125 const Register obja = c_rarg0; //U:rdi
3126 const Register objb = c_rarg1; //U:rsi
3127 const Register length = c_rarg2; //U:rdx
3128 const Register scale = c_rarg3; //U:rcx
3129 const Register tmp1 = r8;
3130 const Register tmp2 = r9;
3131 #endif
3132 const Register result = rax; //return value
3133 const XMMRegister vec0 = xmm0;
3134 const XMMRegister vec1 = xmm1;
3135 const XMMRegister vec2 = xmm2;
3136
3137 __ vectorized_mismatch(obja, objb, length, scale, result, tmp1, tmp2, vec0, vec1, vec2);
3138
3139 __ vzeroupper();
3140 __ leave();
3141 __ ret(0);
3142
3143 return start;
3144 }
3145
3146 /**
3147 * Arguments:
3148 *
3149 // Input:
3150 // c_rarg0 - x address
3151 // c_rarg1 - x length
3152 // c_rarg2 - z address
3153 // c_rarg3 - z length
3154 *
3155 */
3156 address StubGenerator::generate_squareToLen() {
3157
3158 __ align(CodeEntryAlignment);
3159 StubCodeMark mark(this, "StubRoutines", "squareToLen");
3160 address start = __ pc();
3161
3162 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
3163 // Unix: rdi, rsi, rdx, rcx (c_rarg0, c_rarg1, ...)
3164 const Register x = rdi;
3165 const Register len = rsi;
3166 const Register z = r8;
3167 const Register zlen = rcx;
3168
3169 const Register tmp1 = r12;
3170 const Register tmp2 = r13;
3171 const Register tmp3 = r14;
3172 const Register tmp4 = r15;
3173 const Register tmp5 = rbx;
3174
3175 BLOCK_COMMENT("Entry:");
3176 __ enter(); // required for proper stackwalking of RuntimeStub frame
3177
3178 setup_arg_regs(4); // x => rdi, len => rsi, z => rdx
3179 // zlen => rcx
3180 // r9 and r10 may be used to save non-volatile registers
3181 __ movptr(r8, rdx);
3182 __ square_to_len(x, len, z, zlen, tmp1, tmp2, tmp3, tmp4, tmp5, rdx, rax);
3183
3184 restore_arg_regs();
3185
3186 __ leave(); // required for proper stackwalking of RuntimeStub frame
3187 __ ret(0);
3188
3189 return start;
3190 }
3191
3192 address StubGenerator::generate_method_entry_barrier() {
3193 __ align(CodeEntryAlignment);
3194 StubCodeMark mark(this, "StubRoutines", "nmethod_entry_barrier");
3195 address start = __ pc();
3196
3197 Label deoptimize_label;
3198
3199 __ push(-1); // cookie, this is used for writing the new rsp when deoptimizing
3200
3201 BLOCK_COMMENT("Entry:");
3202 __ enter(); // save rbp
3203
3204 // save c_rarg0, because we want to use that value.
3205 // We could do without it but then we depend on the number of slots used by pusha
3206 __ push(c_rarg0);
3207
3208 __ lea(c_rarg0, Address(rsp, wordSize * 3)); // 1 for cookie, 1 for rbp, 1 for c_rarg0 - this should be the return address
3209
3210 __ pusha();
3211
3212 // The method may have floats as arguments, and we must spill them before calling
3213 // the VM runtime.
3214 assert(Argument::n_float_register_parameters_j == 8, "Assumption");
3215 const int xmm_size = wordSize * 2;
3216 const int xmm_spill_size = xmm_size * Argument::n_float_register_parameters_j;
3217 __ subptr(rsp, xmm_spill_size);
3218 __ movdqu(Address(rsp, xmm_size * 7), xmm7);
3219 __ movdqu(Address(rsp, xmm_size * 6), xmm6);
3220 __ movdqu(Address(rsp, xmm_size * 5), xmm5);
3221 __ movdqu(Address(rsp, xmm_size * 4), xmm4);
3222 __ movdqu(Address(rsp, xmm_size * 3), xmm3);
3223 __ movdqu(Address(rsp, xmm_size * 2), xmm2);
3224 __ movdqu(Address(rsp, xmm_size * 1), xmm1);
3225 __ movdqu(Address(rsp, xmm_size * 0), xmm0);
3226
3227 __ call_VM_leaf(CAST_FROM_FN_PTR(address, static_cast<int (*)(address*)>(BarrierSetNMethod::nmethod_stub_entry_barrier)), 1);
3228
3229 __ movdqu(xmm0, Address(rsp, xmm_size * 0));
3230 __ movdqu(xmm1, Address(rsp, xmm_size * 1));
3231 __ movdqu(xmm2, Address(rsp, xmm_size * 2));
3232 __ movdqu(xmm3, Address(rsp, xmm_size * 3));
3233 __ movdqu(xmm4, Address(rsp, xmm_size * 4));
3234 __ movdqu(xmm5, Address(rsp, xmm_size * 5));
3235 __ movdqu(xmm6, Address(rsp, xmm_size * 6));
3236 __ movdqu(xmm7, Address(rsp, xmm_size * 7));
3237 __ addptr(rsp, xmm_spill_size);
3238
3239 __ cmpl(rax, 1); // 1 means deoptimize
3240 __ jcc(Assembler::equal, deoptimize_label);
3241
3242 __ popa();
3243 __ pop(c_rarg0);
3244
3245 __ leave();
3246
3247 __ addptr(rsp, 1 * wordSize); // cookie
3248 __ ret(0);
3249
3250
3251 __ BIND(deoptimize_label);
3252
3253 __ popa();
3254 __ pop(c_rarg0);
3255
3256 __ leave();
3257
3258 // this can be taken out, but is good for verification purposes. getting a SIGSEGV
3259 // here while still having a correct stack is valuable
3260 __ testptr(rsp, Address(rsp, 0));
3261
3262 __ movptr(rsp, Address(rsp, 0)); // new rsp was written in the barrier
3263 __ jmp(Address(rsp, -1 * wordSize)); // jmp target should be callers verified_entry_point
3264
3265 return start;
3266 }
3267
3268 /**
3269 * Arguments:
3270 *
3271 * Input:
3272 * c_rarg0 - out address
3273 * c_rarg1 - in address
3274 * c_rarg2 - offset
3275 * c_rarg3 - len
3276 * not Win64
3277 * c_rarg4 - k
3278 * Win64
3279 * rsp+40 - k
3280 */
3281 address StubGenerator::generate_mulAdd() {
3282 __ align(CodeEntryAlignment);
3283 StubCodeMark mark(this, "StubRoutines", "mulAdd");
3284 address start = __ pc();
3285
3286 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
3287 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
3288 const Register out = rdi;
3289 const Register in = rsi;
3290 const Register offset = r11;
3291 const Register len = rcx;
3292 const Register k = r8;
3293
3294 // Next registers will be saved on stack in mul_add().
3295 const Register tmp1 = r12;
3296 const Register tmp2 = r13;
3297 const Register tmp3 = r14;
3298 const Register tmp4 = r15;
3299 const Register tmp5 = rbx;
3300
3301 BLOCK_COMMENT("Entry:");
3302 __ enter(); // required for proper stackwalking of RuntimeStub frame
3303
3304 setup_arg_regs(4); // out => rdi, in => rsi, offset => rdx
3305 // len => rcx, k => r8
3306 // r9 and r10 may be used to save non-volatile registers
3307 #ifdef _WIN64
3308 // last argument is on stack on Win64
3309 __ movl(k, Address(rsp, 6 * wordSize));
3310 #endif
3311 __ movptr(r11, rdx); // move offset in rdx to offset(r11)
3312 __ mul_add(out, in, offset, len, k, tmp1, tmp2, tmp3, tmp4, tmp5, rdx, rax);
3313
3314 restore_arg_regs();
3315
3316 __ leave(); // required for proper stackwalking of RuntimeStub frame
3317 __ ret(0);
3318
3319 return start;
3320 }
3321
3322 address StubGenerator::generate_bigIntegerRightShift() {
3323 __ align(CodeEntryAlignment);
3324 StubCodeMark mark(this, "StubRoutines", "bigIntegerRightShiftWorker");
3325 address start = __ pc();
3326
3327 Label Shift512Loop, ShiftTwo, ShiftTwoLoop, ShiftOne, Exit;
3328 // For Unix, the arguments are as follows: rdi, rsi, rdx, rcx, r8.
3329 const Register newArr = rdi;
3330 const Register oldArr = rsi;
3331 const Register newIdx = rdx;
3332 const Register shiftCount = rcx; // It was intentional to have shiftCount in rcx since it is used implicitly for shift.
3333 const Register totalNumIter = r8;
3334
3335 // For windows, we use r9 and r10 as temps to save rdi and rsi. Thus we cannot allocate them for our temps.
3336 // For everything else, we prefer using r9 and r10 since we do not have to save them before use.
3337 const Register tmp1 = r11; // Caller save.
3338 const Register tmp2 = rax; // Caller save.
3339 const Register tmp3 = WIN64_ONLY(r12) NOT_WIN64(r9); // Windows: Callee save. Linux: Caller save.
3340 const Register tmp4 = WIN64_ONLY(r13) NOT_WIN64(r10); // Windows: Callee save. Linux: Caller save.
3341 const Register tmp5 = r14; // Callee save.
3342 const Register tmp6 = r15;
3343
3344 const XMMRegister x0 = xmm0;
3345 const XMMRegister x1 = xmm1;
3346 const XMMRegister x2 = xmm2;
3347
3348 BLOCK_COMMENT("Entry:");
3349 __ enter(); // required for proper stackwalking of RuntimeStub frame
3350
3351 #ifdef _WIN64
3352 setup_arg_regs(4);
3353 // For windows, since last argument is on stack, we need to move it to the appropriate register.
3354 __ movl(totalNumIter, Address(rsp, 6 * wordSize));
3355 // Save callee save registers.
3356 __ push(tmp3);
3357 __ push(tmp4);
3358 #endif
3359 __ push(tmp5);
3360
3361 // Rename temps used throughout the code.
3362 const Register idx = tmp1;
3363 const Register nIdx = tmp2;
3364
3365 __ xorl(idx, idx);
3366
3367 // Start right shift from end of the array.
3368 // For example, if #iteration = 4 and newIdx = 1
3369 // then dest[4] = src[4] >> shiftCount | src[3] <<< (shiftCount - 32)
3370 // if #iteration = 4 and newIdx = 0
3371 // then dest[3] = src[4] >> shiftCount | src[3] <<< (shiftCount - 32)
3372 __ movl(idx, totalNumIter);
3373 __ movl(nIdx, idx);
3374 __ addl(nIdx, newIdx);
3375
3376 // If vectorization is enabled, check if the number of iterations is at least 64
3377 // If not, then go to ShifTwo processing 2 iterations
3378 if (VM_Version::supports_avx512_vbmi2()) {
3379 __ cmpptr(totalNumIter, (AVX3Threshold/64));
3380 __ jcc(Assembler::less, ShiftTwo);
3381
3382 if (AVX3Threshold < 16 * 64) {
3383 __ cmpl(totalNumIter, 16);
3384 __ jcc(Assembler::less, ShiftTwo);
3385 }
3386 __ evpbroadcastd(x0, shiftCount, Assembler::AVX_512bit);
3387 __ subl(idx, 16);
3388 __ subl(nIdx, 16);
3389 __ BIND(Shift512Loop);
3390 __ evmovdqul(x2, Address(oldArr, idx, Address::times_4, 4), Assembler::AVX_512bit);
3391 __ evmovdqul(x1, Address(oldArr, idx, Address::times_4), Assembler::AVX_512bit);
3392 __ vpshrdvd(x2, x1, x0, Assembler::AVX_512bit);
3393 __ evmovdqul(Address(newArr, nIdx, Address::times_4), x2, Assembler::AVX_512bit);
3394 __ subl(nIdx, 16);
3395 __ subl(idx, 16);
3396 __ jcc(Assembler::greaterEqual, Shift512Loop);
3397 __ addl(idx, 16);
3398 __ addl(nIdx, 16);
3399 }
3400 __ BIND(ShiftTwo);
3401 __ cmpl(idx, 2);
3402 __ jcc(Assembler::less, ShiftOne);
3403 __ subl(idx, 2);
3404 __ subl(nIdx, 2);
3405 __ BIND(ShiftTwoLoop);
3406 __ movl(tmp5, Address(oldArr, idx, Address::times_4, 8));
3407 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 4));
3408 __ movl(tmp3, Address(oldArr, idx, Address::times_4));
3409 __ shrdl(tmp5, tmp4);
3410 __ shrdl(tmp4, tmp3);
3411 __ movl(Address(newArr, nIdx, Address::times_4, 4), tmp5);
3412 __ movl(Address(newArr, nIdx, Address::times_4), tmp4);
3413 __ subl(nIdx, 2);
3414 __ subl(idx, 2);
3415 __ jcc(Assembler::greaterEqual, ShiftTwoLoop);
3416 __ addl(idx, 2);
3417 __ addl(nIdx, 2);
3418
3419 // Do the last iteration
3420 __ BIND(ShiftOne);
3421 __ cmpl(idx, 1);
3422 __ jcc(Assembler::less, Exit);
3423 __ subl(idx, 1);
3424 __ subl(nIdx, 1);
3425 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 4));
3426 __ movl(tmp3, Address(oldArr, idx, Address::times_4));
3427 __ shrdl(tmp4, tmp3);
3428 __ movl(Address(newArr, nIdx, Address::times_4), tmp4);
3429 __ BIND(Exit);
3430 __ vzeroupper();
3431 // Restore callee save registers.
3432 __ pop(tmp5);
3433 #ifdef _WIN64
3434 __ pop(tmp4);
3435 __ pop(tmp3);
3436 restore_arg_regs();
3437 #endif
3438 __ leave(); // required for proper stackwalking of RuntimeStub frame
3439 __ ret(0);
3440
3441 return start;
3442 }
3443
3444 /**
3445 * Arguments:
3446 *
3447 * Input:
3448 * c_rarg0 - newArr address
3449 * c_rarg1 - oldArr address
3450 * c_rarg2 - newIdx
3451 * c_rarg3 - shiftCount
3452 * not Win64
3453 * c_rarg4 - numIter
3454 * Win64
3455 * rsp40 - numIter
3456 */
3457 address StubGenerator::generate_bigIntegerLeftShift() {
3458 __ align(CodeEntryAlignment);
3459 StubCodeMark mark(this, "StubRoutines", "bigIntegerLeftShiftWorker");
3460 address start = __ pc();
3461
3462 Label Shift512Loop, ShiftTwo, ShiftTwoLoop, ShiftOne, Exit;
3463 // For Unix, the arguments are as follows: rdi, rsi, rdx, rcx, r8.
3464 const Register newArr = rdi;
3465 const Register oldArr = rsi;
3466 const Register newIdx = rdx;
3467 const Register shiftCount = rcx; // It was intentional to have shiftCount in rcx since it is used implicitly for shift.
3468 const Register totalNumIter = r8;
3469 // For windows, we use r9 and r10 as temps to save rdi and rsi. Thus we cannot allocate them for our temps.
3470 // For everything else, we prefer using r9 and r10 since we do not have to save them before use.
3471 const Register tmp1 = r11; // Caller save.
3472 const Register tmp2 = rax; // Caller save.
3473 const Register tmp3 = WIN64_ONLY(r12) NOT_WIN64(r9); // Windows: Callee save. Linux: Caller save.
3474 const Register tmp4 = WIN64_ONLY(r13) NOT_WIN64(r10); // Windows: Callee save. Linux: Caller save.
3475 const Register tmp5 = r14; // Callee save.
3476
3477 const XMMRegister x0 = xmm0;
3478 const XMMRegister x1 = xmm1;
3479 const XMMRegister x2 = xmm2;
3480 BLOCK_COMMENT("Entry:");
3481 __ enter(); // required for proper stackwalking of RuntimeStub frame
3482
3483 #ifdef _WIN64
3484 setup_arg_regs(4);
3485 // For windows, since last argument is on stack, we need to move it to the appropriate register.
3486 __ movl(totalNumIter, Address(rsp, 6 * wordSize));
3487 // Save callee save registers.
3488 __ push(tmp3);
3489 __ push(tmp4);
3490 #endif
3491 __ push(tmp5);
3492
3493 // Rename temps used throughout the code
3494 const Register idx = tmp1;
3495 const Register numIterTmp = tmp2;
3496
3497 // Start idx from zero.
3498 __ xorl(idx, idx);
3499 // Compute interior pointer for new array. We do this so that we can use same index for both old and new arrays.
3500 __ lea(newArr, Address(newArr, newIdx, Address::times_4));
3501 __ movl(numIterTmp, totalNumIter);
3502
3503 // If vectorization is enabled, check if the number of iterations is at least 64
3504 // If not, then go to ShiftTwo shifting two numbers at a time
3505 if (VM_Version::supports_avx512_vbmi2()) {
3506 __ cmpl(totalNumIter, (AVX3Threshold/64));
3507 __ jcc(Assembler::less, ShiftTwo);
3508
3509 if (AVX3Threshold < 16 * 64) {
3510 __ cmpl(totalNumIter, 16);
3511 __ jcc(Assembler::less, ShiftTwo);
3512 }
3513 __ evpbroadcastd(x0, shiftCount, Assembler::AVX_512bit);
3514 __ subl(numIterTmp, 16);
3515 __ BIND(Shift512Loop);
3516 __ evmovdqul(x1, Address(oldArr, idx, Address::times_4), Assembler::AVX_512bit);
3517 __ evmovdqul(x2, Address(oldArr, idx, Address::times_4, 0x4), Assembler::AVX_512bit);
3518 __ vpshldvd(x1, x2, x0, Assembler::AVX_512bit);
3519 __ evmovdqul(Address(newArr, idx, Address::times_4), x1, Assembler::AVX_512bit);
3520 __ addl(idx, 16);
3521 __ subl(numIterTmp, 16);
3522 __ jcc(Assembler::greaterEqual, Shift512Loop);
3523 __ addl(numIterTmp, 16);
3524 }
3525 __ BIND(ShiftTwo);
3526 __ cmpl(totalNumIter, 1);
3527 __ jcc(Assembler::less, Exit);
3528 __ movl(tmp3, Address(oldArr, idx, Address::times_4));
3529 __ subl(numIterTmp, 2);
3530 __ jcc(Assembler::less, ShiftOne);
3531
3532 __ BIND(ShiftTwoLoop);
3533 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 0x4));
3534 __ movl(tmp5, Address(oldArr, idx, Address::times_4, 0x8));
3535 __ shldl(tmp3, tmp4);
3536 __ shldl(tmp4, tmp5);
3537 __ movl(Address(newArr, idx, Address::times_4), tmp3);
3538 __ movl(Address(newArr, idx, Address::times_4, 0x4), tmp4);
3539 __ movl(tmp3, tmp5);
3540 __ addl(idx, 2);
3541 __ subl(numIterTmp, 2);
3542 __ jcc(Assembler::greaterEqual, ShiftTwoLoop);
3543
3544 // Do the last iteration
3545 __ BIND(ShiftOne);
3546 __ addl(numIterTmp, 2);
3547 __ cmpl(numIterTmp, 1);
3548 __ jcc(Assembler::less, Exit);
3549 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 0x4));
3550 __ shldl(tmp3, tmp4);
3551 __ movl(Address(newArr, idx, Address::times_4), tmp3);
3552
3553 __ BIND(Exit);
3554 __ vzeroupper();
3555 // Restore callee save registers.
3556 __ pop(tmp5);
3557 #ifdef _WIN64
3558 __ pop(tmp4);
3559 __ pop(tmp3);
3560 restore_arg_regs();
3561 #endif
3562 __ leave(); // required for proper stackwalking of RuntimeStub frame
3563 __ ret(0);
3564
3565 return start;
3566 }
3567
3568 void StubGenerator::generate_libm_stubs() {
3569 if (UseLibmIntrinsic && InlineIntrinsics) {
3570 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dsin)) {
3571 StubRoutines::_dsin = generate_libmSin(); // from stubGenerator_x86_64_sin.cpp
3572 }
3573 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dcos)) {
3574 StubRoutines::_dcos = generate_libmCos(); // from stubGenerator_x86_64_cos.cpp
3575 }
3576 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dtan)) {
3577 StubRoutines::_dtan = generate_libmTan(); // from stubGenerator_x86_64_tan.cpp
3578 }
3579 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dtanh)) {
3580 StubRoutines::_dtanh = generate_libmTanh(); // from stubGenerator_x86_64_tanh.cpp
3581 }
3582 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dexp)) {
3583 StubRoutines::_dexp = generate_libmExp(); // from stubGenerator_x86_64_exp.cpp
3584 }
3585 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dpow)) {
3586 StubRoutines::_dpow = generate_libmPow(); // from stubGenerator_x86_64_pow.cpp
3587 }
3588 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dlog)) {
3589 StubRoutines::_dlog = generate_libmLog(); // from stubGenerator_x86_64_log.cpp
3590 }
3591 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dlog10)) {
3592 StubRoutines::_dlog10 = generate_libmLog10(); // from stubGenerator_x86_64_log.cpp
3593 }
3594 }
3595 }
3596
3597 /**
3598 * Arguments:
3599 *
3600 * Input:
3601 * c_rarg0 - float16 jshort
3602 *
3603 * Output:
3604 * xmm0 - float
3605 */
3606 address StubGenerator::generate_float16ToFloat() {
3607 StubCodeMark mark(this, "StubRoutines", "float16ToFloat");
3608
3609 address start = __ pc();
3610
3611 BLOCK_COMMENT("Entry:");
3612 // No need for RuntimeStub frame since it is called only during JIT compilation
3613
3614 // Load value into xmm0 and convert
3615 __ flt16_to_flt(xmm0, c_rarg0);
3616
3617 __ ret(0);
3618
3619 return start;
3620 }
3621
3622 /**
3623 * Arguments:
3624 *
3625 * Input:
3626 * xmm0 - float
3627 *
3628 * Output:
3629 * rax - float16 jshort
3630 */
3631 address StubGenerator::generate_floatToFloat16() {
3632 StubCodeMark mark(this, "StubRoutines", "floatToFloat16");
3633
3634 address start = __ pc();
3635
3636 BLOCK_COMMENT("Entry:");
3637 // No need for RuntimeStub frame since it is called only during JIT compilation
3638
3639 // Convert and put result into rax
3640 __ flt_to_flt16(rax, xmm0, xmm1);
3641
3642 __ ret(0);
3643
3644 return start;
3645 }
3646
3647 address StubGenerator::generate_cont_thaw(const char* label, Continuation::thaw_kind kind) {
3648 if (!Continuations::enabled()) return nullptr;
3649
3650 bool return_barrier = Continuation::is_thaw_return_barrier(kind);
3651 bool return_barrier_exception = Continuation::is_thaw_return_barrier_exception(kind);
3652
3653 StubCodeMark mark(this, "StubRoutines", label);
3654 address start = __ pc();
3655
3656 // TODO: Handle Valhalla return types. May require generating different return barriers.
3657
3658 if (!return_barrier) {
3659 // Pop return address. If we don't do this, we get a drift,
3660 // where the bottom-most frozen frame continuously grows.
3661 __ pop(c_rarg3);
3662 } else {
3663 __ movptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
3664 }
3665
3666 #ifdef ASSERT
3667 {
3668 Label L_good_sp;
3669 __ cmpptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
3670 __ jcc(Assembler::equal, L_good_sp);
3671 __ stop("Incorrect rsp at thaw entry");
3672 __ BIND(L_good_sp);
3673 }
3674 #endif // ASSERT
3675
3676 if (return_barrier) {
3677 // Preserve possible return value from a method returning to the return barrier.
3678 __ push(rax);
3679 __ push_d(xmm0);
3680 }
3681
3682 __ movptr(c_rarg0, r15_thread);
3683 __ movptr(c_rarg1, (return_barrier ? 1 : 0));
3684 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Continuation::prepare_thaw), 2);
3685 __ movptr(rbx, rax);
3686
3687 if (return_barrier) {
3688 // Restore return value from a method returning to the return barrier.
3689 // No safepoint in the call to thaw, so even an oop return value should be OK.
3690 __ pop_d(xmm0);
3691 __ pop(rax);
3692 }
3693
3694 #ifdef ASSERT
3695 {
3696 Label L_good_sp;
3697 __ cmpptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
3698 __ jcc(Assembler::equal, L_good_sp);
3699 __ stop("Incorrect rsp after prepare thaw");
3700 __ BIND(L_good_sp);
3701 }
3702 #endif // ASSERT
3703
3704 // rbx contains the size of the frames to thaw, 0 if overflow or no more frames
3705 Label L_thaw_success;
3706 __ testptr(rbx, rbx);
3707 __ jccb(Assembler::notZero, L_thaw_success);
3708 __ jump(RuntimeAddress(SharedRuntime::throw_StackOverflowError_entry()));
3709 __ bind(L_thaw_success);
3710
3711 // Make room for the thawed frames and align the stack.
3712 __ subptr(rsp, rbx);
3713 __ andptr(rsp, -StackAlignmentInBytes);
3714
3715 if (return_barrier) {
3716 // Preserve possible return value from a method returning to the return barrier. (Again.)
3717 __ push(rax);
3718 __ push_d(xmm0);
3719 }
3720
3721 // If we want, we can templatize thaw by kind, and have three different entries.
3722 __ movptr(c_rarg0, r15_thread);
3723 __ movptr(c_rarg1, kind);
3724 __ call_VM_leaf(Continuation::thaw_entry(), 2);
3725 __ movptr(rbx, rax);
3726
3727 if (return_barrier) {
3728 // Restore return value from a method returning to the return barrier. (Again.)
3729 // No safepoint in the call to thaw, so even an oop return value should be OK.
3730 __ pop_d(xmm0);
3731 __ pop(rax);
3732 } else {
3733 // Return 0 (success) from doYield.
3734 __ xorptr(rax, rax);
3735 }
3736
3737 // After thawing, rbx is the SP of the yielding frame.
3738 // Move there, and then to saved RBP slot.
3739 __ movptr(rsp, rbx);
3740 __ subptr(rsp, 2*wordSize);
3741
3742 if (return_barrier_exception) {
3743 __ movptr(c_rarg0, r15_thread);
3744 __ movptr(c_rarg1, Address(rsp, wordSize)); // return address
3745
3746 // rax still holds the original exception oop, save it before the call
3747 __ push(rax);
3748
3749 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), 2);
3750 __ movptr(rbx, rax);
3751
3752 // Continue at exception handler:
3753 // rax: exception oop
3754 // rbx: exception handler
3755 // rdx: exception pc
3756 __ pop(rax);
3757 __ verify_oop(rax);
3758 __ pop(rbp); // pop out RBP here too
3759 __ pop(rdx);
3760 __ jmp(rbx);
3761 } else {
3762 // We are "returning" into the topmost thawed frame; see Thaw::push_return_frame
3763 __ pop(rbp);
3764 __ ret(0);
3765 }
3766
3767 return start;
3768 }
3769
3770 address StubGenerator::generate_cont_thaw() {
3771 return generate_cont_thaw("Cont thaw", Continuation::thaw_top);
3772 }
3773
3774 // TODO: will probably need multiple return barriers depending on return type
3775
3776 address StubGenerator::generate_cont_returnBarrier() {
3777 return generate_cont_thaw("Cont thaw return barrier", Continuation::thaw_return_barrier);
3778 }
3779
3780 address StubGenerator::generate_cont_returnBarrier_exception() {
3781 return generate_cont_thaw("Cont thaw return barrier exception", Continuation::thaw_return_barrier_exception);
3782 }
3783
3784 // exception handler for upcall stubs
3785 address StubGenerator::generate_upcall_stub_exception_handler() {
3786 StubCodeMark mark(this, "StubRoutines", "upcall stub exception handler");
3787 address start = __ pc();
3788
3789 // native caller has no idea how to handle exceptions
3790 // we just crash here. Up to callee to catch exceptions.
3791 __ verify_oop(rax);
3792 __ vzeroupper();
3793 __ mov(c_rarg0, rax);
3794 __ andptr(rsp, -StackAlignmentInBytes); // align stack as required by ABI
3795 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
3796 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, UpcallLinker::handle_uncaught_exception)));
3797 __ should_not_reach_here();
3798
3799 return start;
3800 }
3801
3802 // load Method* target of MethodHandle
3803 // j_rarg0 = jobject receiver
3804 // rbx = result
3805 address StubGenerator::generate_upcall_stub_load_target() {
3806 StubCodeMark mark(this, "StubRoutines", "upcall_stub_load_target");
3807 address start = __ pc();
3808
3809 __ resolve_global_jobject(j_rarg0, r15_thread, rscratch1);
3810 // Load target method from receiver
3811 __ load_heap_oop(rbx, Address(j_rarg0, java_lang_invoke_MethodHandle::form_offset()), rscratch1);
3812 __ load_heap_oop(rbx, Address(rbx, java_lang_invoke_LambdaForm::vmentry_offset()), rscratch1);
3813 __ load_heap_oop(rbx, Address(rbx, java_lang_invoke_MemberName::method_offset()), rscratch1);
3814 __ access_load_at(T_ADDRESS, IN_HEAP, rbx,
3815 Address(rbx, java_lang_invoke_ResolvedMethodName::vmtarget_offset()),
3816 noreg, noreg);
3817 __ movptr(Address(r15_thread, JavaThread::callee_target_offset()), rbx); // just in case callee is deoptimized
3818
3819 __ ret(0);
3820
3821 return start;
3822 }
3823
3824 address StubGenerator::generate_lookup_secondary_supers_table_stub(u1 super_klass_index) {
3825 StubCodeMark mark(this, "StubRoutines", "lookup_secondary_supers_table");
3826
3827 address start = __ pc();
3828
3829 const Register
3830 r_super_klass = rax,
3831 r_sub_klass = rsi,
3832 result = rdi;
3833
3834 __ lookup_secondary_supers_table_const(r_sub_klass, r_super_klass,
3835 rdx, rcx, rbx, r11, // temps
3836 result,
3837 super_klass_index);
3838 __ ret(0);
3839
3840 return start;
3841 }
3842
3843 // Slow path implementation for UseSecondarySupersTable.
3844 address StubGenerator::generate_lookup_secondary_supers_table_slow_path_stub() {
3845 StubCodeMark mark(this, "StubRoutines", "lookup_secondary_supers_table");
3846
3847 address start = __ pc();
3848
3849 const Register
3850 r_super_klass = rax,
3851 r_array_base = rbx,
3852 r_array_index = rdx,
3853 r_sub_klass = rsi,
3854 r_bitmap = r11,
3855 result = rdi;
3856
3857 Label L_success;
3858 __ lookup_secondary_supers_table_slow_path(r_super_klass, r_array_base, r_array_index, r_bitmap,
3859 rcx, rdi, // temps
3860 &L_success);
3861 // bind(L_failure);
3862 __ movl(result, 1);
3863 __ ret(0);
3864
3865 __ bind(L_success);
3866 __ movl(result, 0);
3867 __ ret(0);
3868
3869 return start;
3870 }
3871
3872 void StubGenerator::create_control_words() {
3873 // Round to nearest, 64-bit mode, exceptions masked, flags specialized
3874 StubRoutines::x86::_mxcsr_std = EnableX86ECoreOpts ? 0x1FBF : 0x1F80;
3875 // Round to zero, 64-bit mode, exceptions masked, flags specialized
3876 StubRoutines::x86::_mxcsr_rz = EnableX86ECoreOpts ? 0x7FBF : 0x7F80;
3877 }
3878
3879 // Initialization
3880 void StubGenerator::generate_initial_stubs() {
3881 // Generates all stubs and initializes the entry points
3882
3883 // This platform-specific settings are needed by generate_call_stub()
3884 create_control_words();
3885
3886 // Initialize table for unsafe copy memeory check.
3887 if (UnsafeMemoryAccess::_table == nullptr) {
3888 UnsafeMemoryAccess::create_table(16 + 4); // 16 for copyMemory; 4 for setMemory
3889 }
3890
3891 // entry points that exist in all platforms Note: This is code
3892 // that could be shared among different platforms - however the
3893 // benefit seems to be smaller than the disadvantage of having a
3894 // much more complicated generator structure. See also comment in
3895 // stubRoutines.hpp.
3896
3897 StubRoutines::_forward_exception_entry = generate_forward_exception();
3898
3899 StubRoutines::_call_stub_entry =
3900 generate_call_stub(StubRoutines::_call_stub_return_address);
3901
3902 // is referenced by megamorphic call
3903 StubRoutines::_catch_exception_entry = generate_catch_exception();
3904
3905 // atomic calls
3906 StubRoutines::_fence_entry = generate_orderaccess_fence();
3907
3908 // platform dependent
3909 StubRoutines::x86::_get_previous_sp_entry = generate_get_previous_sp();
3910
3911 StubRoutines::x86::_verify_mxcsr_entry = generate_verify_mxcsr();
3912
3913 StubRoutines::x86::_f2i_fixup = generate_f2i_fixup();
3914 StubRoutines::x86::_f2l_fixup = generate_f2l_fixup();
3915 StubRoutines::x86::_d2i_fixup = generate_d2i_fixup();
3916 StubRoutines::x86::_d2l_fixup = generate_d2l_fixup();
3917
3918 StubRoutines::x86::_float_sign_mask = generate_fp_mask("float_sign_mask", 0x7FFFFFFF7FFFFFFF);
3919 StubRoutines::x86::_float_sign_flip = generate_fp_mask("float_sign_flip", 0x8000000080000000);
3920 StubRoutines::x86::_double_sign_mask = generate_fp_mask("double_sign_mask", 0x7FFFFFFFFFFFFFFF);
3921 StubRoutines::x86::_double_sign_flip = generate_fp_mask("double_sign_flip", 0x8000000000000000);
3922
3923 if (UseCRC32Intrinsics) {
3924 // set table address before stub generation which use it
3925 StubRoutines::_crc_table_adr = (address)StubRoutines::x86::_crc_table;
3926 StubRoutines::_updateBytesCRC32 = generate_updateBytesCRC32();
3927 }
3928
3929 if (UseCRC32CIntrinsics) {
3930 bool supports_clmul = VM_Version::supports_clmul();
3931 StubRoutines::x86::generate_CRC32C_table(supports_clmul);
3932 StubRoutines::_crc32c_table_addr = (address)StubRoutines::x86::_crc32c_table;
3933 StubRoutines::_updateBytesCRC32C = generate_updateBytesCRC32C(supports_clmul);
3934 }
3935
3936 if (VM_Version::supports_float16()) {
3937 // For results consistency both intrinsics should be enabled.
3938 // vmIntrinsics checks InlineIntrinsics flag, no need to check it here.
3939 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_float16ToFloat) &&
3940 vmIntrinsics::is_intrinsic_available(vmIntrinsics::_floatToFloat16)) {
3941 StubRoutines::_hf2f = generate_float16ToFloat();
3942 StubRoutines::_f2hf = generate_floatToFloat16();
3943 }
3944 }
3945
3946 generate_libm_stubs();
3947
3948 StubRoutines::_fmod = generate_libmFmod(); // from stubGenerator_x86_64_fmod.cpp
3949 }
3950
3951 void StubGenerator::generate_continuation_stubs() {
3952 // Continuation stubs:
3953 StubRoutines::_cont_thaw = generate_cont_thaw();
3954 StubRoutines::_cont_returnBarrier = generate_cont_returnBarrier();
3955 StubRoutines::_cont_returnBarrierExc = generate_cont_returnBarrier_exception();
3956 }
3957
3958 void StubGenerator::generate_final_stubs() {
3959 // Generates the rest of stubs and initializes the entry points
3960
3961 // support for verify_oop (must happen after universe_init)
3962 if (VerifyOops) {
3963 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop();
3964 }
3965
3966 // data cache line writeback
3967 StubRoutines::_data_cache_writeback = generate_data_cache_writeback();
3968 StubRoutines::_data_cache_writeback_sync = generate_data_cache_writeback_sync();
3969
3970 // arraycopy stubs used by compilers
3971 generate_arraycopy_stubs();
3972
3973 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
3974 if (bs_nm != nullptr) {
3975 StubRoutines::_method_entry_barrier = generate_method_entry_barrier();
3976 }
3977
3978 if (UseVectorizedMismatchIntrinsic) {
3979 StubRoutines::_vectorizedMismatch = generate_vectorizedMismatch();
3980 }
3981
3982 StubRoutines::_upcall_stub_exception_handler = generate_upcall_stub_exception_handler();
3983 StubRoutines::_upcall_stub_load_target = generate_upcall_stub_load_target();
3984 }
3985
3986 void StubGenerator::generate_compiler_stubs() {
3987 #if COMPILER2_OR_JVMCI
3988
3989 // Entry points that are C2 compiler specific.
3990
3991 StubRoutines::x86::_vector_float_sign_mask = generate_vector_mask("vector_float_sign_mask", 0x7FFFFFFF7FFFFFFF);
3992 StubRoutines::x86::_vector_float_sign_flip = generate_vector_mask("vector_float_sign_flip", 0x8000000080000000);
3993 StubRoutines::x86::_vector_double_sign_mask = generate_vector_mask("vector_double_sign_mask", 0x7FFFFFFFFFFFFFFF);
3994 StubRoutines::x86::_vector_double_sign_flip = generate_vector_mask("vector_double_sign_flip", 0x8000000000000000);
3995 StubRoutines::x86::_vector_all_bits_set = generate_vector_mask("vector_all_bits_set", 0xFFFFFFFFFFFFFFFF);
3996 StubRoutines::x86::_vector_int_mask_cmp_bits = generate_vector_mask("vector_int_mask_cmp_bits", 0x0000000100000001);
3997 StubRoutines::x86::_vector_short_to_byte_mask = generate_vector_mask("vector_short_to_byte_mask", 0x00ff00ff00ff00ff);
3998 StubRoutines::x86::_vector_byte_perm_mask = generate_vector_byte_perm_mask("vector_byte_perm_mask");
3999 StubRoutines::x86::_vector_int_to_byte_mask = generate_vector_mask("vector_int_to_byte_mask", 0x000000ff000000ff);
4000 StubRoutines::x86::_vector_int_to_short_mask = generate_vector_mask("vector_int_to_short_mask", 0x0000ffff0000ffff);
4001 StubRoutines::x86::_vector_32_bit_mask = generate_vector_custom_i32("vector_32_bit_mask", Assembler::AVX_512bit,
4002 0xFFFFFFFF, 0, 0, 0);
4003 StubRoutines::x86::_vector_64_bit_mask = generate_vector_custom_i32("vector_64_bit_mask", Assembler::AVX_512bit,
4004 0xFFFFFFFF, 0xFFFFFFFF, 0, 0);
4005 StubRoutines::x86::_vector_int_shuffle_mask = generate_vector_mask("vector_int_shuffle_mask", 0x0302010003020100);
4006 StubRoutines::x86::_vector_byte_shuffle_mask = generate_vector_byte_shuffle_mask("vector_byte_shuffle_mask");
4007 StubRoutines::x86::_vector_short_shuffle_mask = generate_vector_mask("vector_short_shuffle_mask", 0x0100010001000100);
4008 StubRoutines::x86::_vector_long_shuffle_mask = generate_vector_mask("vector_long_shuffle_mask", 0x0000000100000000);
4009 StubRoutines::x86::_vector_long_sign_mask = generate_vector_mask("vector_long_sign_mask", 0x8000000000000000);
4010 StubRoutines::x86::_vector_iota_indices = generate_iota_indices("iota_indices");
4011 StubRoutines::x86::_vector_count_leading_zeros_lut = generate_count_leading_zeros_lut("count_leading_zeros_lut");
4012 StubRoutines::x86::_vector_reverse_bit_lut = generate_vector_reverse_bit_lut("reverse_bit_lut");
4013 StubRoutines::x86::_vector_reverse_byte_perm_mask_long = generate_vector_reverse_byte_perm_mask_long("perm_mask_long");
4014 StubRoutines::x86::_vector_reverse_byte_perm_mask_int = generate_vector_reverse_byte_perm_mask_int("perm_mask_int");
4015 StubRoutines::x86::_vector_reverse_byte_perm_mask_short = generate_vector_reverse_byte_perm_mask_short("perm_mask_short");
4016
4017 if (VM_Version::supports_avx2() && !VM_Version::supports_avx512vl()) {
4018 StubRoutines::x86::_compress_perm_table32 = generate_compress_perm_table("compress_perm_table32", 32);
4019 StubRoutines::x86::_compress_perm_table64 = generate_compress_perm_table("compress_perm_table64", 64);
4020 StubRoutines::x86::_expand_perm_table32 = generate_expand_perm_table("expand_perm_table32", 32);
4021 StubRoutines::x86::_expand_perm_table64 = generate_expand_perm_table("expand_perm_table64", 64);
4022 }
4023
4024 if (VM_Version::supports_avx2() && !VM_Version::supports_avx512_vpopcntdq()) {
4025 // lut implementation influenced by counting 1s algorithm from section 5-1 of Hackers' Delight.
4026 StubRoutines::x86::_vector_popcount_lut = generate_popcount_avx_lut("popcount_lut");
4027 }
4028
4029 generate_aes_stubs();
4030
4031 generate_ghash_stubs();
4032
4033 generate_chacha_stubs();
4034
4035 generate_sha3_stubs();
4036
4037 #ifdef COMPILER2
4038 if ((UseAVX == 2) && EnableX86ECoreOpts) {
4039 generate_string_indexof(StubRoutines::_string_indexof_array);
4040 }
4041 #endif
4042
4043 if (UseAdler32Intrinsics) {
4044 StubRoutines::_updateBytesAdler32 = generate_updateBytesAdler32();
4045 }
4046
4047 if (UsePoly1305Intrinsics) {
4048 StubRoutines::_poly1305_processBlocks = generate_poly1305_processBlocks();
4049 }
4050
4051 if (UseIntPolyIntrinsics) {
4052 StubRoutines::_intpoly_montgomeryMult_P256 = generate_intpoly_montgomeryMult_P256();
4053 StubRoutines::_intpoly_assign = generate_intpoly_assign();
4054 }
4055
4056 if (UseMD5Intrinsics) {
4057 StubRoutines::_md5_implCompress = generate_md5_implCompress(false, "md5_implCompress");
4058 StubRoutines::_md5_implCompressMB = generate_md5_implCompress(true, "md5_implCompressMB");
4059 }
4060
4061 if (UseSHA1Intrinsics) {
4062 StubRoutines::x86::_upper_word_mask_addr = generate_upper_word_mask();
4063 StubRoutines::x86::_shuffle_byte_flip_mask_addr = generate_shuffle_byte_flip_mask();
4064 StubRoutines::_sha1_implCompress = generate_sha1_implCompress(false, "sha1_implCompress");
4065 StubRoutines::_sha1_implCompressMB = generate_sha1_implCompress(true, "sha1_implCompressMB");
4066 }
4067
4068 if (UseSHA256Intrinsics) {
4069 StubRoutines::x86::_k256_adr = (address)StubRoutines::x86::_k256;
4070 char* dst = (char*)StubRoutines::x86::_k256_W;
4071 char* src = (char*)StubRoutines::x86::_k256;
4072 for (int ii = 0; ii < 16; ++ii) {
4073 memcpy(dst + 32 * ii, src + 16 * ii, 16);
4074 memcpy(dst + 32 * ii + 16, src + 16 * ii, 16);
4075 }
4076 StubRoutines::x86::_k256_W_adr = (address)StubRoutines::x86::_k256_W;
4077 StubRoutines::x86::_pshuffle_byte_flip_mask_addr = generate_pshuffle_byte_flip_mask();
4078 StubRoutines::_sha256_implCompress = generate_sha256_implCompress(false, "sha256_implCompress");
4079 StubRoutines::_sha256_implCompressMB = generate_sha256_implCompress(true, "sha256_implCompressMB");
4080 }
4081
4082 if (UseSHA512Intrinsics) {
4083 StubRoutines::x86::_k512_W_addr = (address)StubRoutines::x86::_k512_W;
4084 StubRoutines::x86::_pshuffle_byte_flip_mask_addr_sha512 = generate_pshuffle_byte_flip_mask_sha512();
4085 StubRoutines::_sha512_implCompress = generate_sha512_implCompress(false, "sha512_implCompress");
4086 StubRoutines::_sha512_implCompressMB = generate_sha512_implCompress(true, "sha512_implCompressMB");
4087 }
4088
4089 if (UseBASE64Intrinsics) {
4090 if(VM_Version::supports_avx2()) {
4091 StubRoutines::x86::_avx2_shuffle_base64 = base64_avx2_shuffle_addr();
4092 StubRoutines::x86::_avx2_input_mask_base64 = base64_avx2_input_mask_addr();
4093 StubRoutines::x86::_avx2_lut_base64 = base64_avx2_lut_addr();
4094 StubRoutines::x86::_avx2_decode_tables_base64 = base64_AVX2_decode_tables_addr();
4095 StubRoutines::x86::_avx2_decode_lut_tables_base64 = base64_AVX2_decode_LUT_tables_addr();
4096 }
4097 StubRoutines::x86::_encoding_table_base64 = base64_encoding_table_addr();
4098 if (VM_Version::supports_avx512_vbmi()) {
4099 StubRoutines::x86::_shuffle_base64 = base64_shuffle_addr();
4100 StubRoutines::x86::_lookup_lo_base64 = base64_vbmi_lookup_lo_addr();
4101 StubRoutines::x86::_lookup_hi_base64 = base64_vbmi_lookup_hi_addr();
4102 StubRoutines::x86::_lookup_lo_base64url = base64_vbmi_lookup_lo_url_addr();
4103 StubRoutines::x86::_lookup_hi_base64url = base64_vbmi_lookup_hi_url_addr();
4104 StubRoutines::x86::_pack_vec_base64 = base64_vbmi_pack_vec_addr();
4105 StubRoutines::x86::_join_0_1_base64 = base64_vbmi_join_0_1_addr();
4106 StubRoutines::x86::_join_1_2_base64 = base64_vbmi_join_1_2_addr();
4107 StubRoutines::x86::_join_2_3_base64 = base64_vbmi_join_2_3_addr();
4108 }
4109 StubRoutines::x86::_decoding_table_base64 = base64_decoding_table_addr();
4110 StubRoutines::_base64_encodeBlock = generate_base64_encodeBlock();
4111 StubRoutines::_base64_decodeBlock = generate_base64_decodeBlock();
4112 }
4113
4114 #ifdef COMPILER2
4115 if (UseMultiplyToLenIntrinsic) {
4116 StubRoutines::_multiplyToLen = generate_multiplyToLen();
4117 }
4118 if (UseSquareToLenIntrinsic) {
4119 StubRoutines::_squareToLen = generate_squareToLen();
4120 }
4121 if (UseMulAddIntrinsic) {
4122 StubRoutines::_mulAdd = generate_mulAdd();
4123 }
4124 if (VM_Version::supports_avx512_vbmi2()) {
4125 StubRoutines::_bigIntegerRightShiftWorker = generate_bigIntegerRightShift();
4126 StubRoutines::_bigIntegerLeftShiftWorker = generate_bigIntegerLeftShift();
4127 }
4128 if (UseSecondarySupersTable) {
4129 StubRoutines::_lookup_secondary_supers_table_slow_path_stub = generate_lookup_secondary_supers_table_slow_path_stub();
4130 if (! InlineSecondarySupersTest) {
4131 for (int slot = 0; slot < Klass::SECONDARY_SUPERS_TABLE_SIZE; slot++) {
4132 StubRoutines::_lookup_secondary_supers_table_stubs[slot] = generate_lookup_secondary_supers_table_stub(slot);
4133 }
4134 }
4135 }
4136 if (UseMontgomeryMultiplyIntrinsic) {
4137 StubRoutines::_montgomeryMultiply
4138 = CAST_FROM_FN_PTR(address, SharedRuntime::montgomery_multiply);
4139 }
4140 if (UseMontgomerySquareIntrinsic) {
4141 StubRoutines::_montgomerySquare
4142 = CAST_FROM_FN_PTR(address, SharedRuntime::montgomery_square);
4143 }
4144
4145 // Load x86_64_sort library on supported hardware to enable SIMD sort and partition intrinsics
4146
4147 if (VM_Version::is_intel() && (VM_Version::supports_avx512dq() || VM_Version::supports_avx2())) {
4148 void *libsimdsort = nullptr;
4149 char ebuf_[1024];
4150 char dll_name_simd_sort[JVM_MAXPATHLEN];
4151 if (os::dll_locate_lib(dll_name_simd_sort, sizeof(dll_name_simd_sort), Arguments::get_dll_dir(), "simdsort")) {
4152 libsimdsort = os::dll_load(dll_name_simd_sort, ebuf_, sizeof ebuf_);
4153 }
4154 // Get addresses for SIMD sort and partition routines
4155 if (libsimdsort != nullptr) {
4156 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, JNI_LIB_PREFIX "simdsort" JNI_LIB_SUFFIX, p2i(libsimdsort));
4157
4158 snprintf(ebuf_, sizeof(ebuf_), VM_Version::supports_avx512dq() ? "avx512_sort" : "avx2_sort");
4159 StubRoutines::_array_sort = (address)os::dll_lookup(libsimdsort, ebuf_);
4160
4161 snprintf(ebuf_, sizeof(ebuf_), VM_Version::supports_avx512dq() ? "avx512_partition" : "avx2_partition");
4162 StubRoutines::_array_partition = (address)os::dll_lookup(libsimdsort, ebuf_);
4163 }
4164 }
4165
4166 // Get svml stub routine addresses
4167 void *libjsvml = nullptr;
4168 char ebuf[1024];
4169 char dll_name[JVM_MAXPATHLEN];
4170 if (os::dll_locate_lib(dll_name, sizeof(dll_name), Arguments::get_dll_dir(), "jsvml")) {
4171 libjsvml = os::dll_load(dll_name, ebuf, sizeof ebuf);
4172 }
4173 if (libjsvml != nullptr) {
4174 // SVML method naming convention
4175 // All the methods are named as __jsvml_op<T><N>_ha_<VV>
4176 // Where:
4177 // ha stands for high accuracy
4178 // <T> is optional to indicate float/double
4179 // Set to f for vector float operation
4180 // Omitted for vector double operation
4181 // <N> is the number of elements in the vector
4182 // 1, 2, 4, 8, 16
4183 // e.g. 128 bit float vector has 4 float elements
4184 // <VV> indicates the avx/sse level:
4185 // z0 is AVX512, l9 is AVX2, e9 is AVX1 and ex is for SSE2
4186 // e.g. __jsvml_expf16_ha_z0 is the method for computing 16 element vector float exp using AVX 512 insns
4187 // __jsvml_exp8_ha_z0 is the method for computing 8 element vector double exp using AVX 512 insns
4188
4189 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, JNI_LIB_PREFIX "jsvml" JNI_LIB_SUFFIX, p2i(libjsvml));
4190 if (UseAVX > 2) {
4191 for (int op = 0; op < VectorSupport::NUM_VECTOR_OP_MATH; op++) {
4192 int vop = VectorSupport::VECTOR_OP_MATH_START + op;
4193 if ((!VM_Version::supports_avx512dq()) &&
4194 (vop == VectorSupport::VECTOR_OP_LOG || vop == VectorSupport::VECTOR_OP_LOG10 || vop == VectorSupport::VECTOR_OP_POW)) {
4195 continue;
4196 }
4197 snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf16_ha_z0", VectorSupport::mathname[op]);
4198 StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_512][op] = (address)os::dll_lookup(libjsvml, ebuf);
4199
4200 snprintf(ebuf, sizeof(ebuf), "__jsvml_%s8_ha_z0", VectorSupport::mathname[op]);
4201 StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_512][op] = (address)os::dll_lookup(libjsvml, ebuf);
4202 }
4203 }
4204 const char* avx_sse_str = (UseAVX >= 2) ? "l9" : ((UseAVX == 1) ? "e9" : "ex");
4205 for (int op = 0; op < VectorSupport::NUM_VECTOR_OP_MATH; op++) {
4206 int vop = VectorSupport::VECTOR_OP_MATH_START + op;
4207 if (vop == VectorSupport::VECTOR_OP_POW) {
4208 continue;
4209 }
4210 snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf4_ha_%s", VectorSupport::mathname[op], avx_sse_str);
4211 StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_64][op] = (address)os::dll_lookup(libjsvml, ebuf);
4212
4213 snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf4_ha_%s", VectorSupport::mathname[op], avx_sse_str);
4214 StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_128][op] = (address)os::dll_lookup(libjsvml, ebuf);
4215
4216 snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf8_ha_%s", VectorSupport::mathname[op], avx_sse_str);
4217 StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_256][op] = (address)os::dll_lookup(libjsvml, ebuf);
4218
4219 snprintf(ebuf, sizeof(ebuf), "__jsvml_%s1_ha_%s", VectorSupport::mathname[op], avx_sse_str);
4220 StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_64][op] = (address)os::dll_lookup(libjsvml, ebuf);
4221
4222 snprintf(ebuf, sizeof(ebuf), "__jsvml_%s2_ha_%s", VectorSupport::mathname[op], avx_sse_str);
4223 StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_128][op] = (address)os::dll_lookup(libjsvml, ebuf);
4224
4225 snprintf(ebuf, sizeof(ebuf), "__jsvml_%s4_ha_%s", VectorSupport::mathname[op], avx_sse_str);
4226 StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_256][op] = (address)os::dll_lookup(libjsvml, ebuf);
4227 }
4228 }
4229
4230 #endif // COMPILER2
4231 #endif // COMPILER2_OR_JVMCI
4232 }
4233
4234 StubGenerator::StubGenerator(CodeBuffer* code, StubsKind kind) : StubCodeGenerator(code) {
4235 DEBUG_ONLY( _regs_in_thread = false; )
4236 switch(kind) {
4237 case Initial_stubs:
4238 generate_initial_stubs();
4239 break;
4240 case Continuation_stubs:
4241 generate_continuation_stubs();
4242 break;
4243 case Compiler_stubs:
4244 generate_compiler_stubs();
4245 break;
4246 case Final_stubs:
4247 generate_final_stubs();
4248 break;
4249 default:
4250 fatal("unexpected stubs kind: %d", kind);
4251 break;
4252 };
4253 }
4254
4255 void StubGenerator_generate(CodeBuffer* code, StubCodeGenerator::StubsKind kind) {
4256 StubGenerator g(code, kind);
4257 }
4258
4259 #undef __