1 /*
2 * Copyright (c) 2003, 2023, 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/assembler.hpp"
27 #include "asm/macroAssembler.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 "runtime/arguments.hpp"
37 #include "runtime/javaThread.hpp"
38 #include "runtime/sharedRuntime.hpp"
39 #include "runtime/stubRoutines.hpp"
40 #include "utilities/macros.hpp"
41 #include "vmreg_x86.inline.hpp"
42 #include "stubGenerator_x86_64.hpp"
43 #ifdef COMPILER2
44 #include "opto/runtime.hpp"
45 #include "opto/c2_globals.hpp"
46 #endif
47 #if INCLUDE_JVMCI
48 #include "jvmci/jvmci_globals.hpp"
49 #endif
50 #if INCLUDE_JFR
51 #include "jfr/support/jfrIntrinsics.hpp"
52 #endif
53
54 // For a more detailed description of the stub routine structure
55 // see the comment in stubRoutines.hpp
56
57 #define __ _masm->
58 #define TIMES_OOP (UseCompressedOops ? Address::times_4 : Address::times_8)
59
60 #ifdef PRODUCT
61 #define BLOCK_COMMENT(str) /* nothing */
62 #else
63 #define BLOCK_COMMENT(str) __ block_comment(str)
64 #endif // PRODUCT
65
66 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
67
68 //
69 // Linux Arguments:
70 // c_rarg0: call wrapper address address
71 // c_rarg1: result address
72 // c_rarg2: result type BasicType
73 // c_rarg3: method Method*
74 // c_rarg4: (interpreter) entry point address
75 // c_rarg5: parameters intptr_t*
76 // 16(rbp): parameter size (in words) int
77 // 24(rbp): thread Thread*
78 //
79 // [ return_from_Java ] <--- rsp
80 // [ argument word n ]
81 // ...
82 // -12 [ argument word 1 ]
83 // -11 [ saved r15 ] <--- rsp_after_call
84 // -10 [ saved r14 ]
85 // -9 [ saved r13 ]
86 // -8 [ saved r12 ]
87 // -7 [ saved rbx ]
88 // -6 [ call wrapper ]
89 // -5 [ result ]
90 // -4 [ result type ]
91 // -3 [ method ]
92 // -2 [ entry point ]
93 // -1 [ parameters ]
94 // 0 [ saved rbp ] <--- rbp
95 // 1 [ return address ]
96 // 2 [ parameter size ]
97 // 3 [ thread ]
98 //
99 // Windows Arguments:
100 // c_rarg0: call wrapper address address
101 // c_rarg1: result address
102 // c_rarg2: result type BasicType
103 // c_rarg3: method Method*
104 // 48(rbp): (interpreter) entry point address
105 // 56(rbp): parameters intptr_t*
106 // 64(rbp): parameter size (in words) int
107 // 72(rbp): thread Thread*
108 //
109 // [ return_from_Java ] <--- rsp
110 // [ argument word n ]
111 // ...
112 // -60 [ argument word 1 ]
113 // -59 [ saved xmm31 ] <--- rsp after_call
114 // [ saved xmm16-xmm30 ] (EVEX enabled, else the space is blank)
115 // -27 [ saved xmm15 ]
116 // [ saved xmm7-xmm14 ]
117 // -9 [ saved xmm6 ] (each xmm register takes 2 slots)
118 // -7 [ saved r15 ]
119 // -6 [ saved r14 ]
120 // -5 [ saved r13 ]
121 // -4 [ saved r12 ]
122 // -3 [ saved rdi ]
123 // -2 [ saved rsi ]
124 // -1 [ saved rbx ]
125 // 0 [ saved rbp ] <--- rbp
126 // 1 [ return address ]
127 // 2 [ call wrapper ]
128 // 3 [ result ]
129 // 4 [ result type ]
130 // 5 [ method ]
131 // 6 [ entry point ]
132 // 7 [ parameters ]
133 // 8 [ parameter size ]
134 // 9 [ thread ]
135 //
136 // Windows reserves the callers stack space for arguments 1-4.
137 // We spill c_rarg0-c_rarg3 to this space.
138
139 // Call stub stack layout word offsets from rbp
140 #ifdef _WIN64
141 enum call_stub_layout {
142 xmm_save_first = 6, // save from xmm6
143 xmm_save_last = 31, // to xmm31
144 xmm_save_base = -9,
145 rsp_after_call_off = xmm_save_base - 2 * (xmm_save_last - xmm_save_first), // -27
146 r15_off = -7,
147 r14_off = -6,
148 r13_off = -5,
149 r12_off = -4,
150 rdi_off = -3,
151 rsi_off = -2,
152 rbx_off = -1,
153 rbp_off = 0,
154 retaddr_off = 1,
155 call_wrapper_off = 2,
156 result_off = 3,
157 result_type_off = 4,
158 method_off = 5,
159 entry_point_off = 6,
160 parameters_off = 7,
161 parameter_size_off = 8,
162 thread_off = 9
163 };
164
165 static Address xmm_save(int reg) {
166 assert(reg >= xmm_save_first && reg <= xmm_save_last, "XMM register number out of range");
167 return Address(rbp, (xmm_save_base - (reg - xmm_save_first) * 2) * wordSize);
168 }
169 #else // !_WIN64
170 enum call_stub_layout {
171 rsp_after_call_off = -12,
172 mxcsr_off = rsp_after_call_off,
173 r15_off = -11,
174 r14_off = -10,
175 r13_off = -9,
176 r12_off = -8,
177 rbx_off = -7,
178 call_wrapper_off = -6,
179 result_off = -5,
180 result_type_off = -4,
181 method_off = -3,
182 entry_point_off = -2,
183 parameters_off = -1,
184 rbp_off = 0,
185 retaddr_off = 1,
186 parameter_size_off = 2,
187 thread_off = 3
188 };
189 #endif // _WIN64
190
191 address StubGenerator::generate_call_stub(address& return_address) {
192
193 assert((int)frame::entry_frame_after_call_words == -(int)rsp_after_call_off + 1 &&
194 (int)frame::entry_frame_call_wrapper_offset == (int)call_wrapper_off,
195 "adjust this code");
196 StubCodeMark mark(this, "StubRoutines", "call_stub");
197 address start = __ pc();
198
199 // same as in generate_catch_exception()!
200 const Address rsp_after_call(rbp, rsp_after_call_off * wordSize);
201
202 const Address call_wrapper (rbp, call_wrapper_off * wordSize);
203 const Address result (rbp, result_off * wordSize);
204 const Address result_type (rbp, result_type_off * wordSize);
205 const Address method (rbp, method_off * wordSize);
206 const Address entry_point (rbp, entry_point_off * wordSize);
207 const Address parameters (rbp, parameters_off * wordSize);
208 const Address parameter_size(rbp, parameter_size_off * wordSize);
209
210 // same as in generate_catch_exception()!
211 const Address thread (rbp, thread_off * wordSize);
212
213 const Address r15_save(rbp, r15_off * wordSize);
214 const Address r14_save(rbp, r14_off * wordSize);
215 const Address r13_save(rbp, r13_off * wordSize);
216 const Address r12_save(rbp, r12_off * wordSize);
217 const Address rbx_save(rbp, rbx_off * wordSize);
218
219 // stub code
220 __ enter();
221 __ subptr(rsp, -rsp_after_call_off * wordSize);
222
223 // save register parameters
224 #ifndef _WIN64
225 __ movptr(parameters, c_rarg5); // parameters
226 __ movptr(entry_point, c_rarg4); // entry_point
227 #endif
228
229 __ movptr(method, c_rarg3); // method
230 __ movl(result_type, c_rarg2); // result type
231 __ movptr(result, c_rarg1); // result
232 __ movptr(call_wrapper, c_rarg0); // call wrapper
233
234 // save regs belonging to calling function
235 __ movptr(rbx_save, rbx);
236 __ movptr(r12_save, r12);
237 __ movptr(r13_save, r13);
238 __ movptr(r14_save, r14);
239 __ movptr(r15_save, r15);
240
241 #ifdef _WIN64
242 int last_reg = 15;
243 if (UseAVX > 2) {
244 last_reg = 31;
245 }
246 if (VM_Version::supports_evex()) {
247 for (int i = xmm_save_first; i <= last_reg; i++) {
248 __ vextractf32x4(xmm_save(i), as_XMMRegister(i), 0);
249 }
250 } else {
251 for (int i = xmm_save_first; i <= last_reg; i++) {
252 __ movdqu(xmm_save(i), as_XMMRegister(i));
253 }
254 }
255
256 const Address rdi_save(rbp, rdi_off * wordSize);
257 const Address rsi_save(rbp, rsi_off * wordSize);
258
259 __ movptr(rsi_save, rsi);
260 __ movptr(rdi_save, rdi);
261 #else
262 const Address mxcsr_save(rbp, mxcsr_off * wordSize);
263 {
264 Label skip_ldmx;
265 __ stmxcsr(mxcsr_save);
266 __ movl(rax, mxcsr_save);
267 __ andl(rax, 0xFFC0); // Mask out any pending exceptions (only check control and mask bits)
268 ExternalAddress mxcsr_std(StubRoutines::x86::addr_mxcsr_std());
269 __ cmp32(rax, mxcsr_std, rscratch1);
270 __ jcc(Assembler::equal, skip_ldmx);
271 __ ldmxcsr(mxcsr_std, rscratch1);
272 __ bind(skip_ldmx);
273 }
274 #endif
275
276 // Load up thread register
277 __ movptr(r15_thread, thread);
278 __ reinit_heapbase();
279
280 #ifdef ASSERT
281 // make sure we have no pending exceptions
282 {
283 Label L;
284 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
285 __ jcc(Assembler::equal, L);
286 __ stop("StubRoutines::call_stub: entered with pending exception");
287 __ bind(L);
288 }
289 #endif
290
291 // pass parameters if any
292 BLOCK_COMMENT("pass parameters if any");
293 Label parameters_done;
294 __ movl(c_rarg3, parameter_size);
295 __ testl(c_rarg3, c_rarg3);
296 __ jcc(Assembler::zero, parameters_done);
297
298 Label loop;
299 __ movptr(c_rarg2, parameters); // parameter pointer
300 __ movl(c_rarg1, c_rarg3); // parameter counter is in c_rarg1
301 __ BIND(loop);
302 __ movptr(rax, Address(c_rarg2, 0));// get parameter
303 __ addptr(c_rarg2, wordSize); // advance to next parameter
304 __ decrementl(c_rarg1); // decrement counter
305 __ push(rax); // pass parameter
306 __ jcc(Assembler::notZero, loop);
307
308 // call Java function
309 __ BIND(parameters_done);
310 __ movptr(rbx, method); // get Method*
311 __ movptr(c_rarg1, entry_point); // get entry_point
312 __ mov(r13, rsp); // set sender sp
313 BLOCK_COMMENT("call Java function");
314 __ call(c_rarg1);
315
316 BLOCK_COMMENT("call_stub_return_address:");
317 return_address = __ pc();
318
319 // store result depending on type (everything that is not
320 // T_OBJECT, T_PRIMITIVE_OBJECT, T_LONG, T_FLOAT or T_DOUBLE is treated as T_INT)
321 __ movptr(r13, result);
322 Label is_long, is_float, is_double, check_prim, exit;
323 __ movl(rbx, result_type);
324 __ cmpl(rbx, T_OBJECT);
325 __ jcc(Assembler::equal, check_prim);
326 __ cmpl(rbx, T_PRIMITIVE_OBJECT);
327 __ jcc(Assembler::equal, check_prim);
328 __ cmpl(rbx, T_LONG);
329 __ jcc(Assembler::equal, is_long);
330 __ cmpl(rbx, T_FLOAT);
331 __ jcc(Assembler::equal, is_float);
332 __ cmpl(rbx, T_DOUBLE);
333 __ jcc(Assembler::equal, is_double);
334 #ifdef ASSERT
335 // make sure the type is INT
336 {
337 Label L;
338 __ cmpl(rbx, T_INT);
339 __ jcc(Assembler::equal, L);
340 __ stop("StubRoutines::call_stub: unexpected result type");
341 __ bind(L);
342 }
343 #endif
344
345 // handle T_INT case
346 __ movl(Address(r13, 0), rax);
347
348 __ BIND(exit);
349
350 // pop parameters
351 __ lea(rsp, rsp_after_call);
352
353 #ifdef ASSERT
354 // verify that threads correspond
355 {
356 Label L1, L2, L3;
357 __ cmpptr(r15_thread, thread);
358 __ jcc(Assembler::equal, L1);
359 __ stop("StubRoutines::call_stub: r15_thread is corrupted");
360 __ bind(L1);
361 __ get_thread(rbx);
362 __ cmpptr(r15_thread, thread);
363 __ jcc(Assembler::equal, L2);
364 __ stop("StubRoutines::call_stub: r15_thread is modified by call");
365 __ bind(L2);
366 __ cmpptr(r15_thread, rbx);
367 __ jcc(Assembler::equal, L3);
368 __ stop("StubRoutines::call_stub: threads must correspond");
369 __ bind(L3);
370 }
371 #endif
372
373 __ pop_cont_fastpath();
374
375 // restore regs belonging to calling function
376 #ifdef _WIN64
377 // emit the restores for xmm regs
378 if (VM_Version::supports_evex()) {
379 for (int i = xmm_save_first; i <= last_reg; i++) {
380 __ vinsertf32x4(as_XMMRegister(i), as_XMMRegister(i), xmm_save(i), 0);
381 }
382 } else {
383 for (int i = xmm_save_first; i <= last_reg; i++) {
384 __ movdqu(as_XMMRegister(i), xmm_save(i));
385 }
386 }
387 #endif
388 __ movptr(r15, r15_save);
389 __ movptr(r14, r14_save);
390 __ movptr(r13, r13_save);
391 __ movptr(r12, r12_save);
392 __ movptr(rbx, rbx_save);
393
394 #ifdef _WIN64
395 __ movptr(rdi, rdi_save);
396 __ movptr(rsi, rsi_save);
397 #else
398 __ ldmxcsr(mxcsr_save);
399 #endif
400
401 // restore rsp
402 __ addptr(rsp, -rsp_after_call_off * wordSize);
403
404 // return
405 __ vzeroupper();
406 __ pop(rbp);
407 __ ret(0);
408
409 // handle return types different from T_INT
410 __ BIND(check_prim);
411 if (InlineTypeReturnedAsFields) {
412 // Check for scalarized return value
413 __ testptr(rax, 1);
414 __ jcc(Assembler::zero, is_long);
415 // Load pack handler address
416 __ andptr(rax, -2);
417 __ movptr(rax, Address(rax, InstanceKlass::adr_inlineklass_fixed_block_offset()));
418 __ movptr(rbx, Address(rax, InlineKlass::pack_handler_jobject_offset()));
419 // Call pack handler to initialize the buffer
420 __ call(rbx);
421 __ jmp(exit);
422 }
423 __ BIND(is_long);
424 __ movq(Address(r13, 0), rax);
425 __ jmp(exit);
426
427 __ BIND(is_float);
428 __ movflt(Address(r13, 0), xmm0);
429 __ jmp(exit);
430
431 __ BIND(is_double);
432 __ movdbl(Address(r13, 0), xmm0);
433 __ jmp(exit);
434
435 return start;
436 }
437
438 // Return point for a Java call if there's an exception thrown in
439 // Java code. The exception is caught and transformed into a
440 // pending exception stored in JavaThread that can be tested from
441 // within the VM.
442 //
443 // Note: Usually the parameters are removed by the callee. In case
444 // of an exception crossing an activation frame boundary, that is
445 // not the case if the callee is compiled code => need to setup the
446 // rsp.
447 //
448 // rax: exception oop
449
450 address StubGenerator::generate_catch_exception() {
451 StubCodeMark mark(this, "StubRoutines", "catch_exception");
452 address start = __ pc();
453
454 // same as in generate_call_stub():
455 const Address rsp_after_call(rbp, rsp_after_call_off * wordSize);
456 const Address thread (rbp, thread_off * wordSize);
457
458 #ifdef ASSERT
459 // verify that threads correspond
460 {
461 Label L1, L2, L3;
462 __ cmpptr(r15_thread, thread);
463 __ jcc(Assembler::equal, L1);
464 __ stop("StubRoutines::catch_exception: r15_thread is corrupted");
465 __ bind(L1);
466 __ get_thread(rbx);
467 __ cmpptr(r15_thread, thread);
468 __ jcc(Assembler::equal, L2);
469 __ stop("StubRoutines::catch_exception: r15_thread is modified by call");
470 __ bind(L2);
471 __ cmpptr(r15_thread, rbx);
472 __ jcc(Assembler::equal, L3);
473 __ stop("StubRoutines::catch_exception: threads must correspond");
474 __ bind(L3);
475 }
476 #endif
477
478 // set pending exception
479 __ verify_oop(rax);
480
481 __ movptr(Address(r15_thread, Thread::pending_exception_offset()), rax);
482 __ lea(rscratch1, ExternalAddress((address)__FILE__));
483 __ movptr(Address(r15_thread, Thread::exception_file_offset()), rscratch1);
484 __ movl(Address(r15_thread, Thread::exception_line_offset()), (int) __LINE__);
485
486 // complete return to VM
487 assert(StubRoutines::_call_stub_return_address != nullptr,
488 "_call_stub_return_address must have been generated before");
489 __ jump(RuntimeAddress(StubRoutines::_call_stub_return_address));
490
491 return start;
492 }
493
494 // Continuation point for runtime calls returning with a pending
495 // exception. The pending exception check happened in the runtime
496 // or native call stub. The pending exception in Thread is
497 // converted into a Java-level exception.
498 //
499 // Contract with Java-level exception handlers:
500 // rax: exception
501 // rdx: throwing pc
502 //
503 // NOTE: At entry of this stub, exception-pc must be on stack !!
504
505 address StubGenerator::generate_forward_exception() {
506 StubCodeMark mark(this, "StubRoutines", "forward exception");
507 address start = __ pc();
508
509 // Upon entry, the sp points to the return address returning into
510 // Java (interpreted or compiled) code; i.e., the return address
511 // becomes the throwing pc.
512 //
513 // Arguments pushed before the runtime call are still on the stack
514 // but the exception handler will reset the stack pointer ->
515 // ignore them. A potential result in registers can be ignored as
516 // well.
517
518 #ifdef ASSERT
519 // make sure this code is only executed if there is a pending exception
520 {
521 Label L;
522 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
523 __ jcc(Assembler::notEqual, L);
524 __ stop("StubRoutines::forward exception: no pending exception (1)");
525 __ bind(L);
526 }
527 #endif
528
529 // compute exception handler into rbx
530 __ movptr(c_rarg0, Address(rsp, 0));
531 BLOCK_COMMENT("call exception_handler_for_return_address");
532 __ call_VM_leaf(CAST_FROM_FN_PTR(address,
533 SharedRuntime::exception_handler_for_return_address),
534 r15_thread, c_rarg0);
535 __ mov(rbx, rax);
536
537 // setup rax & rdx, remove return address & clear pending exception
538 __ pop(rdx);
539 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset()));
540 __ movptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
541
542 #ifdef ASSERT
543 // make sure exception is set
544 {
545 Label L;
546 __ testptr(rax, rax);
547 __ jcc(Assembler::notEqual, L);
548 __ stop("StubRoutines::forward exception: no pending exception (2)");
549 __ bind(L);
550 }
551 #endif
552
553 // continue at exception handler (return address removed)
554 // rax: exception
555 // rbx: exception handler
556 // rdx: throwing pc
557 __ verify_oop(rax);
558 __ jmp(rbx);
559
560 return start;
561 }
562
563 // Support for intptr_t OrderAccess::fence()
564 //
565 // Arguments :
566 //
567 // Result:
568 address StubGenerator::generate_orderaccess_fence() {
569 StubCodeMark mark(this, "StubRoutines", "orderaccess_fence");
570 address start = __ pc();
571
572 __ membar(Assembler::StoreLoad);
573 __ ret(0);
574
575 return start;
576 }
577
578
579 // Support for intptr_t get_previous_sp()
580 //
581 // This routine is used to find the previous stack pointer for the
582 // caller.
583 address StubGenerator::generate_get_previous_sp() {
584 StubCodeMark mark(this, "StubRoutines", "get_previous_sp");
585 address start = __ pc();
586
587 __ movptr(rax, rsp);
588 __ addptr(rax, 8); // return address is at the top of the stack.
589 __ ret(0);
590
591 return start;
592 }
593
594 //----------------------------------------------------------------------------------------------------
595 // Support for void verify_mxcsr()
596 //
597 // This routine is used with -Xcheck:jni to verify that native
598 // JNI code does not return to Java code without restoring the
599 // MXCSR register to our expected state.
600
601 address StubGenerator::generate_verify_mxcsr() {
602 StubCodeMark mark(this, "StubRoutines", "verify_mxcsr");
603 address start = __ pc();
604
605 const Address mxcsr_save(rsp, 0);
606
607 if (CheckJNICalls) {
608 Label ok_ret;
609 ExternalAddress mxcsr_std(StubRoutines::x86::addr_mxcsr_std());
610 __ push(rax);
611 __ subptr(rsp, wordSize); // allocate a temp location
612 __ stmxcsr(mxcsr_save);
613 __ movl(rax, mxcsr_save);
614 __ andl(rax, 0xFFC0); // Mask out any pending exceptions (only check control and mask bits)
615 __ cmp32(rax, mxcsr_std, rscratch1);
616 __ jcc(Assembler::equal, ok_ret);
617
618 __ warn("MXCSR changed by native JNI code, use -XX:+RestoreMXCSROnJNICall");
619
620 __ ldmxcsr(mxcsr_std, rscratch1);
621
622 __ bind(ok_ret);
623 __ addptr(rsp, wordSize);
624 __ pop(rax);
625 }
626
627 __ ret(0);
628
629 return start;
630 }
631
632 address StubGenerator::generate_f2i_fixup() {
633 StubCodeMark mark(this, "StubRoutines", "f2i_fixup");
634 Address inout(rsp, 5 * wordSize); // return address + 4 saves
635
636 address start = __ pc();
637
638 Label L;
639
640 __ push(rax);
641 __ push(c_rarg3);
642 __ push(c_rarg2);
643 __ push(c_rarg1);
644
645 __ movl(rax, 0x7f800000);
646 __ xorl(c_rarg3, c_rarg3);
647 __ movl(c_rarg2, inout);
648 __ movl(c_rarg1, c_rarg2);
649 __ andl(c_rarg1, 0x7fffffff);
650 __ cmpl(rax, c_rarg1); // NaN? -> 0
651 __ jcc(Assembler::negative, L);
652 __ testl(c_rarg2, c_rarg2); // signed ? min_jint : max_jint
653 __ movl(c_rarg3, 0x80000000);
654 __ movl(rax, 0x7fffffff);
655 __ cmovl(Assembler::positive, c_rarg3, rax);
656
657 __ bind(L);
658 __ movptr(inout, c_rarg3);
659
660 __ pop(c_rarg1);
661 __ pop(c_rarg2);
662 __ pop(c_rarg3);
663 __ pop(rax);
664
665 __ ret(0);
666
667 return start;
668 }
669
670 address StubGenerator::generate_f2l_fixup() {
671 StubCodeMark mark(this, "StubRoutines", "f2l_fixup");
672 Address inout(rsp, 5 * wordSize); // return address + 4 saves
673 address start = __ pc();
674
675 Label L;
676
677 __ push(rax);
678 __ push(c_rarg3);
679 __ push(c_rarg2);
680 __ push(c_rarg1);
681
682 __ movl(rax, 0x7f800000);
683 __ xorl(c_rarg3, c_rarg3);
684 __ movl(c_rarg2, inout);
685 __ movl(c_rarg1, c_rarg2);
686 __ andl(c_rarg1, 0x7fffffff);
687 __ cmpl(rax, c_rarg1); // NaN? -> 0
688 __ jcc(Assembler::negative, L);
689 __ testl(c_rarg2, c_rarg2); // signed ? min_jlong : max_jlong
690 __ mov64(c_rarg3, 0x8000000000000000);
691 __ mov64(rax, 0x7fffffffffffffff);
692 __ cmov(Assembler::positive, c_rarg3, rax);
693
694 __ bind(L);
695 __ movptr(inout, c_rarg3);
696
697 __ pop(c_rarg1);
698 __ pop(c_rarg2);
699 __ pop(c_rarg3);
700 __ pop(rax);
701
702 __ ret(0);
703
704 return start;
705 }
706
707 address StubGenerator::generate_d2i_fixup() {
708 StubCodeMark mark(this, "StubRoutines", "d2i_fixup");
709 Address inout(rsp, 6 * wordSize); // return address + 5 saves
710
711 address start = __ pc();
712
713 Label L;
714
715 __ push(rax);
716 __ push(c_rarg3);
717 __ push(c_rarg2);
718 __ push(c_rarg1);
719 __ push(c_rarg0);
720
721 __ movl(rax, 0x7ff00000);
722 __ movq(c_rarg2, inout);
723 __ movl(c_rarg3, c_rarg2);
724 __ mov(c_rarg1, c_rarg2);
725 __ mov(c_rarg0, c_rarg2);
726 __ negl(c_rarg3);
727 __ shrptr(c_rarg1, 0x20);
728 __ orl(c_rarg3, c_rarg2);
729 __ andl(c_rarg1, 0x7fffffff);
730 __ xorl(c_rarg2, c_rarg2);
731 __ shrl(c_rarg3, 0x1f);
732 __ orl(c_rarg1, c_rarg3);
733 __ cmpl(rax, c_rarg1);
734 __ jcc(Assembler::negative, L); // NaN -> 0
735 __ testptr(c_rarg0, c_rarg0); // signed ? min_jint : max_jint
736 __ movl(c_rarg2, 0x80000000);
737 __ movl(rax, 0x7fffffff);
738 __ cmov(Assembler::positive, c_rarg2, rax);
739
740 __ bind(L);
741 __ movptr(inout, c_rarg2);
742
743 __ pop(c_rarg0);
744 __ pop(c_rarg1);
745 __ pop(c_rarg2);
746 __ pop(c_rarg3);
747 __ pop(rax);
748
749 __ ret(0);
750
751 return start;
752 }
753
754 address StubGenerator::generate_d2l_fixup() {
755 StubCodeMark mark(this, "StubRoutines", "d2l_fixup");
756 Address inout(rsp, 6 * wordSize); // return address + 5 saves
757
758 address start = __ pc();
759
760 Label L;
761
762 __ push(rax);
763 __ push(c_rarg3);
764 __ push(c_rarg2);
765 __ push(c_rarg1);
766 __ push(c_rarg0);
767
768 __ movl(rax, 0x7ff00000);
769 __ movq(c_rarg2, inout);
770 __ movl(c_rarg3, c_rarg2);
771 __ mov(c_rarg1, c_rarg2);
772 __ mov(c_rarg0, c_rarg2);
773 __ negl(c_rarg3);
774 __ shrptr(c_rarg1, 0x20);
775 __ orl(c_rarg3, c_rarg2);
776 __ andl(c_rarg1, 0x7fffffff);
777 __ xorl(c_rarg2, c_rarg2);
778 __ shrl(c_rarg3, 0x1f);
779 __ orl(c_rarg1, c_rarg3);
780 __ cmpl(rax, c_rarg1);
781 __ jcc(Assembler::negative, L); // NaN -> 0
782 __ testq(c_rarg0, c_rarg0); // signed ? min_jlong : max_jlong
783 __ mov64(c_rarg2, 0x8000000000000000);
784 __ mov64(rax, 0x7fffffffffffffff);
785 __ cmovq(Assembler::positive, c_rarg2, rax);
786
787 __ bind(L);
788 __ movq(inout, c_rarg2);
789
790 __ pop(c_rarg0);
791 __ pop(c_rarg1);
792 __ pop(c_rarg2);
793 __ pop(c_rarg3);
794 __ pop(rax);
795
796 __ ret(0);
797
798 return start;
799 }
800
801 address StubGenerator::generate_count_leading_zeros_lut(const char *stub_name) {
802 __ align64();
803 StubCodeMark mark(this, "StubRoutines", stub_name);
804 address start = __ pc();
805
806 __ emit_data64(0x0101010102020304, relocInfo::none);
807 __ emit_data64(0x0000000000000000, relocInfo::none);
808 __ emit_data64(0x0101010102020304, relocInfo::none);
809 __ emit_data64(0x0000000000000000, relocInfo::none);
810 __ emit_data64(0x0101010102020304, relocInfo::none);
811 __ emit_data64(0x0000000000000000, relocInfo::none);
812 __ emit_data64(0x0101010102020304, relocInfo::none);
813 __ emit_data64(0x0000000000000000, relocInfo::none);
814
815 return start;
816 }
817
818 address StubGenerator::generate_popcount_avx_lut(const char *stub_name) {
819 __ align64();
820 StubCodeMark mark(this, "StubRoutines", stub_name);
821 address start = __ pc();
822
823 __ emit_data64(0x0302020102010100, relocInfo::none);
824 __ emit_data64(0x0403030203020201, relocInfo::none);
825 __ emit_data64(0x0302020102010100, relocInfo::none);
826 __ emit_data64(0x0403030203020201, relocInfo::none);
827 __ emit_data64(0x0302020102010100, relocInfo::none);
828 __ emit_data64(0x0403030203020201, relocInfo::none);
829 __ emit_data64(0x0302020102010100, relocInfo::none);
830 __ emit_data64(0x0403030203020201, relocInfo::none);
831
832 return start;
833 }
834
835 address StubGenerator::generate_iota_indices(const char *stub_name) {
836 __ align(CodeEntryAlignment);
837 StubCodeMark mark(this, "StubRoutines", stub_name);
838 address start = __ pc();
839 // B
840 __ emit_data64(0x0706050403020100, relocInfo::none);
841 __ emit_data64(0x0F0E0D0C0B0A0908, relocInfo::none);
842 __ emit_data64(0x1716151413121110, relocInfo::none);
843 __ emit_data64(0x1F1E1D1C1B1A1918, relocInfo::none);
844 __ emit_data64(0x2726252423222120, relocInfo::none);
845 __ emit_data64(0x2F2E2D2C2B2A2928, relocInfo::none);
846 __ emit_data64(0x3736353433323130, relocInfo::none);
847 __ emit_data64(0x3F3E3D3C3B3A3938, relocInfo::none);
848 // W
849 __ emit_data64(0x0003000200010000, relocInfo::none);
850 __ emit_data64(0x0007000600050004, relocInfo::none);
851 __ emit_data64(0x000B000A00090008, relocInfo::none);
852 __ emit_data64(0x000F000E000D000C, relocInfo::none);
853 __ emit_data64(0x0013001200110010, relocInfo::none);
854 __ emit_data64(0x0017001600150014, relocInfo::none);
855 __ emit_data64(0x001B001A00190018, relocInfo::none);
856 __ emit_data64(0x001F001E001D001C, relocInfo::none);
857 // D
858 __ emit_data64(0x0000000100000000, relocInfo::none);
859 __ emit_data64(0x0000000300000002, relocInfo::none);
860 __ emit_data64(0x0000000500000004, relocInfo::none);
861 __ emit_data64(0x0000000700000006, relocInfo::none);
862 __ emit_data64(0x0000000900000008, relocInfo::none);
863 __ emit_data64(0x0000000B0000000A, relocInfo::none);
864 __ emit_data64(0x0000000D0000000C, relocInfo::none);
865 __ emit_data64(0x0000000F0000000E, relocInfo::none);
866 // Q
867 __ emit_data64(0x0000000000000000, relocInfo::none);
868 __ emit_data64(0x0000000000000001, relocInfo::none);
869 __ emit_data64(0x0000000000000002, relocInfo::none);
870 __ emit_data64(0x0000000000000003, relocInfo::none);
871 __ emit_data64(0x0000000000000004, relocInfo::none);
872 __ emit_data64(0x0000000000000005, relocInfo::none);
873 __ emit_data64(0x0000000000000006, relocInfo::none);
874 __ emit_data64(0x0000000000000007, relocInfo::none);
875 // D - FP
876 __ emit_data64(0x3F80000000000000, relocInfo::none); // 0.0f, 1.0f
877 __ emit_data64(0x4040000040000000, relocInfo::none); // 2.0f, 3.0f
878 __ emit_data64(0x40A0000040800000, relocInfo::none); // 4.0f, 5.0f
879 __ emit_data64(0x40E0000040C00000, relocInfo::none); // 6.0f, 7.0f
880 __ emit_data64(0x4110000041000000, relocInfo::none); // 8.0f, 9.0f
881 __ emit_data64(0x4130000041200000, relocInfo::none); // 10.0f, 11.0f
882 __ emit_data64(0x4150000041400000, relocInfo::none); // 12.0f, 13.0f
883 __ emit_data64(0x4170000041600000, relocInfo::none); // 14.0f, 15.0f
884 // Q - FP
885 __ emit_data64(0x0000000000000000, relocInfo::none); // 0.0d
886 __ emit_data64(0x3FF0000000000000, relocInfo::none); // 1.0d
887 __ emit_data64(0x4000000000000000, relocInfo::none); // 2.0d
888 __ emit_data64(0x4008000000000000, relocInfo::none); // 3.0d
889 __ emit_data64(0x4010000000000000, relocInfo::none); // 4.0d
890 __ emit_data64(0x4014000000000000, relocInfo::none); // 5.0d
891 __ emit_data64(0x4018000000000000, relocInfo::none); // 6.0d
892 __ emit_data64(0x401c000000000000, relocInfo::none); // 7.0d
893 return start;
894 }
895
896 address StubGenerator::generate_vector_reverse_bit_lut(const char *stub_name) {
897 __ align(CodeEntryAlignment);
898 StubCodeMark mark(this, "StubRoutines", stub_name);
899 address start = __ pc();
900
901 __ emit_data64(0x0E060A020C040800, relocInfo::none);
902 __ emit_data64(0x0F070B030D050901, relocInfo::none);
903 __ emit_data64(0x0E060A020C040800, relocInfo::none);
904 __ emit_data64(0x0F070B030D050901, relocInfo::none);
905 __ emit_data64(0x0E060A020C040800, relocInfo::none);
906 __ emit_data64(0x0F070B030D050901, relocInfo::none);
907 __ emit_data64(0x0E060A020C040800, relocInfo::none);
908 __ emit_data64(0x0F070B030D050901, relocInfo::none);
909
910 return start;
911 }
912
913 address StubGenerator::generate_vector_reverse_byte_perm_mask_long(const char *stub_name) {
914 __ align(CodeEntryAlignment);
915 StubCodeMark mark(this, "StubRoutines", stub_name);
916 address start = __ pc();
917
918 __ emit_data64(0x0001020304050607, relocInfo::none);
919 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
920 __ emit_data64(0x0001020304050607, relocInfo::none);
921 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
922 __ emit_data64(0x0001020304050607, relocInfo::none);
923 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
924 __ emit_data64(0x0001020304050607, relocInfo::none);
925 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
926
927 return start;
928 }
929
930 address StubGenerator::generate_vector_reverse_byte_perm_mask_int(const char *stub_name) {
931 __ align(CodeEntryAlignment);
932 StubCodeMark mark(this, "StubRoutines", stub_name);
933 address start = __ pc();
934
935 __ emit_data64(0x0405060700010203, relocInfo::none);
936 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
937 __ emit_data64(0x0405060700010203, relocInfo::none);
938 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
939 __ emit_data64(0x0405060700010203, relocInfo::none);
940 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
941 __ emit_data64(0x0405060700010203, relocInfo::none);
942 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
943
944 return start;
945 }
946
947 address StubGenerator::generate_vector_reverse_byte_perm_mask_short(const char *stub_name) {
948 __ align(CodeEntryAlignment);
949 StubCodeMark mark(this, "StubRoutines", stub_name);
950 address start = __ pc();
951
952 __ emit_data64(0x0607040502030001, relocInfo::none);
953 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
954 __ emit_data64(0x0607040502030001, relocInfo::none);
955 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
956 __ emit_data64(0x0607040502030001, relocInfo::none);
957 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
958 __ emit_data64(0x0607040502030001, relocInfo::none);
959 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
960
961 return start;
962 }
963
964 address StubGenerator::generate_vector_byte_shuffle_mask(const char *stub_name) {
965 __ align(CodeEntryAlignment);
966 StubCodeMark mark(this, "StubRoutines", stub_name);
967 address start = __ pc();
968
969 __ emit_data64(0x7070707070707070, relocInfo::none);
970 __ emit_data64(0x7070707070707070, relocInfo::none);
971 __ emit_data64(0xF0F0F0F0F0F0F0F0, relocInfo::none);
972 __ emit_data64(0xF0F0F0F0F0F0F0F0, relocInfo::none);
973
974 return start;
975 }
976
977 address StubGenerator::generate_fp_mask(const char *stub_name, int64_t mask) {
978 __ align(CodeEntryAlignment);
979 StubCodeMark mark(this, "StubRoutines", stub_name);
980 address start = __ pc();
981
982 __ emit_data64( mask, relocInfo::none );
983 __ emit_data64( mask, relocInfo::none );
984
985 return start;
986 }
987
988 address StubGenerator::generate_vector_mask(const char *stub_name, int64_t mask) {
989 __ align(CodeEntryAlignment);
990 StubCodeMark mark(this, "StubRoutines", stub_name);
991 address start = __ pc();
992
993 __ emit_data64(mask, relocInfo::none);
994 __ emit_data64(mask, relocInfo::none);
995 __ emit_data64(mask, relocInfo::none);
996 __ emit_data64(mask, relocInfo::none);
997 __ emit_data64(mask, relocInfo::none);
998 __ emit_data64(mask, relocInfo::none);
999 __ emit_data64(mask, relocInfo::none);
1000 __ emit_data64(mask, relocInfo::none);
1001
1002 return start;
1003 }
1004
1005 address StubGenerator::generate_vector_byte_perm_mask(const char *stub_name) {
1006 __ align(CodeEntryAlignment);
1007 StubCodeMark mark(this, "StubRoutines", stub_name);
1008 address start = __ pc();
1009
1010 __ emit_data64(0x0000000000000001, relocInfo::none);
1011 __ emit_data64(0x0000000000000003, relocInfo::none);
1012 __ emit_data64(0x0000000000000005, relocInfo::none);
1013 __ emit_data64(0x0000000000000007, relocInfo::none);
1014 __ emit_data64(0x0000000000000000, relocInfo::none);
1015 __ emit_data64(0x0000000000000002, relocInfo::none);
1016 __ emit_data64(0x0000000000000004, relocInfo::none);
1017 __ emit_data64(0x0000000000000006, relocInfo::none);
1018
1019 return start;
1020 }
1021
1022 address StubGenerator::generate_vector_fp_mask(const char *stub_name, int64_t mask) {
1023 __ align(CodeEntryAlignment);
1024 StubCodeMark mark(this, "StubRoutines", stub_name);
1025 address start = __ pc();
1026
1027 __ emit_data64(mask, relocInfo::none);
1028 __ emit_data64(mask, relocInfo::none);
1029 __ emit_data64(mask, relocInfo::none);
1030 __ emit_data64(mask, relocInfo::none);
1031 __ emit_data64(mask, relocInfo::none);
1032 __ emit_data64(mask, relocInfo::none);
1033 __ emit_data64(mask, relocInfo::none);
1034 __ emit_data64(mask, relocInfo::none);
1035
1036 return start;
1037 }
1038
1039 address StubGenerator::generate_vector_custom_i32(const char *stub_name, Assembler::AvxVectorLen len,
1040 int32_t val0, int32_t val1, int32_t val2, int32_t val3,
1041 int32_t val4, int32_t val5, int32_t val6, int32_t val7,
1042 int32_t val8, int32_t val9, int32_t val10, int32_t val11,
1043 int32_t val12, int32_t val13, int32_t val14, int32_t val15) {
1044 __ align(CodeEntryAlignment);
1045 StubCodeMark mark(this, "StubRoutines", stub_name);
1046 address start = __ pc();
1047
1048 assert(len != Assembler::AVX_NoVec, "vector len must be specified");
1049 __ emit_data(val0, relocInfo::none, 0);
1050 __ emit_data(val1, relocInfo::none, 0);
1051 __ emit_data(val2, relocInfo::none, 0);
1052 __ emit_data(val3, relocInfo::none, 0);
1053 if (len >= Assembler::AVX_256bit) {
1054 __ emit_data(val4, relocInfo::none, 0);
1055 __ emit_data(val5, relocInfo::none, 0);
1056 __ emit_data(val6, relocInfo::none, 0);
1057 __ emit_data(val7, relocInfo::none, 0);
1058 if (len >= Assembler::AVX_512bit) {
1059 __ emit_data(val8, relocInfo::none, 0);
1060 __ emit_data(val9, relocInfo::none, 0);
1061 __ emit_data(val10, relocInfo::none, 0);
1062 __ emit_data(val11, relocInfo::none, 0);
1063 __ emit_data(val12, relocInfo::none, 0);
1064 __ emit_data(val13, relocInfo::none, 0);
1065 __ emit_data(val14, relocInfo::none, 0);
1066 __ emit_data(val15, relocInfo::none, 0);
1067 }
1068 }
1069 return start;
1070 }
1071
1072 // Non-destructive plausibility checks for oops
1073 //
1074 // Arguments:
1075 // all args on stack!
1076 //
1077 // Stack after saving c_rarg3:
1078 // [tos + 0]: saved c_rarg3
1079 // [tos + 1]: saved c_rarg2
1080 // [tos + 2]: saved r12 (several TemplateTable methods use it)
1081 // [tos + 3]: saved flags
1082 // [tos + 4]: return address
1083 // * [tos + 5]: error message (char*)
1084 // * [tos + 6]: object to verify (oop)
1085 // * [tos + 7]: saved rax - saved by caller and bashed
1086 // * [tos + 8]: saved r10 (rscratch1) - saved by caller
1087 // * = popped on exit
1088 address StubGenerator::generate_verify_oop() {
1089 StubCodeMark mark(this, "StubRoutines", "verify_oop");
1090 address start = __ pc();
1091
1092 Label exit, error;
1093
1094 __ pushf();
1095 __ incrementl(ExternalAddress((address) StubRoutines::verify_oop_count_addr()), rscratch1);
1096
1097 __ push(r12);
1098
1099 // save c_rarg2 and c_rarg3
1100 __ push(c_rarg2);
1101 __ push(c_rarg3);
1102
1103 enum {
1104 // After previous pushes.
1105 oop_to_verify = 6 * wordSize,
1106 saved_rax = 7 * wordSize,
1107 saved_r10 = 8 * wordSize,
1108
1109 // Before the call to MacroAssembler::debug(), see below.
1110 return_addr = 16 * wordSize,
1111 error_msg = 17 * wordSize
1112 };
1113
1114 // get object
1115 __ movptr(rax, Address(rsp, oop_to_verify));
1116
1117 // make sure object is 'reasonable'
1118 __ testptr(rax, rax);
1119 __ jcc(Assembler::zero, exit); // if obj is null it is OK
1120
1121 BarrierSetAssembler* bs_asm = BarrierSet::barrier_set()->barrier_set_assembler();
1122 bs_asm->check_oop(_masm, rax, c_rarg2, c_rarg3, error);
1123
1124 // return if everything seems ok
1125 __ bind(exit);
1126 __ movptr(rax, Address(rsp, saved_rax)); // get saved rax back
1127 __ movptr(rscratch1, Address(rsp, saved_r10)); // get saved r10 back
1128 __ pop(c_rarg3); // restore c_rarg3
1129 __ pop(c_rarg2); // restore c_rarg2
1130 __ pop(r12); // restore r12
1131 __ popf(); // restore flags
1132 __ ret(4 * wordSize); // pop caller saved stuff
1133
1134 // handle errors
1135 __ bind(error);
1136 __ movptr(rax, Address(rsp, saved_rax)); // get saved rax back
1137 __ movptr(rscratch1, Address(rsp, saved_r10)); // get saved r10 back
1138 __ pop(c_rarg3); // get saved c_rarg3 back
1139 __ pop(c_rarg2); // get saved c_rarg2 back
1140 __ pop(r12); // get saved r12 back
1141 __ popf(); // get saved flags off stack --
1142 // will be ignored
1143
1144 __ pusha(); // push registers
1145 // (rip is already
1146 // already pushed)
1147 // debug(char* msg, int64_t pc, int64_t regs[])
1148 // We've popped the registers we'd saved (c_rarg3, c_rarg2 and flags), and
1149 // pushed all the registers, so now the stack looks like:
1150 // [tos + 0] 16 saved registers
1151 // [tos + 16] return address
1152 // * [tos + 17] error message (char*)
1153 // * [tos + 18] object to verify (oop)
1154 // * [tos + 19] saved rax - saved by caller and bashed
1155 // * [tos + 20] saved r10 (rscratch1) - saved by caller
1156 // * = popped on exit
1157
1158 __ movptr(c_rarg0, Address(rsp, error_msg)); // pass address of error message
1159 __ movptr(c_rarg1, Address(rsp, return_addr)); // pass return address
1160 __ movq(c_rarg2, rsp); // pass address of regs on stack
1161 __ mov(r12, rsp); // remember rsp
1162 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1163 __ andptr(rsp, -16); // align stack as required by ABI
1164 BLOCK_COMMENT("call MacroAssembler::debug");
1165 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64)));
1166 __ hlt();
1167
1168 return start;
1169 }
1170
1171
1172 // Shuffle first three arg regs on Windows into Linux/Solaris locations.
1173 //
1174 // Outputs:
1175 // rdi - rcx
1176 // rsi - rdx
1177 // rdx - r8
1178 // rcx - r9
1179 //
1180 // Registers r9 and r10 are used to save rdi and rsi on Windows, which latter
1181 // are non-volatile. r9 and r10 should not be used by the caller.
1182 //
1183 void StubGenerator::setup_arg_regs(int nargs) {
1184 const Register saved_rdi = r9;
1185 const Register saved_rsi = r10;
1186 assert(nargs == 3 || nargs == 4, "else fix");
1187 #ifdef _WIN64
1188 assert(c_rarg0 == rcx && c_rarg1 == rdx && c_rarg2 == r8 && c_rarg3 == r9,
1189 "unexpected argument registers");
1190 if (nargs == 4) {
1191 __ mov(rax, r9); // r9 is also saved_rdi
1192 }
1193 __ movptr(saved_rdi, rdi);
1194 __ movptr(saved_rsi, rsi);
1195 __ mov(rdi, rcx); // c_rarg0
1196 __ mov(rsi, rdx); // c_rarg1
1197 __ mov(rdx, r8); // c_rarg2
1198 if (nargs == 4) {
1199 __ mov(rcx, rax); // c_rarg3 (via rax)
1200 }
1201 #else
1202 assert(c_rarg0 == rdi && c_rarg1 == rsi && c_rarg2 == rdx && c_rarg3 == rcx,
1203 "unexpected argument registers");
1204 #endif
1205 DEBUG_ONLY(_regs_in_thread = false;)
1206 }
1207
1208
1209 void StubGenerator::restore_arg_regs() {
1210 assert(!_regs_in_thread, "wrong call to restore_arg_regs");
1211 const Register saved_rdi = r9;
1212 const Register saved_rsi = r10;
1213 #ifdef _WIN64
1214 __ movptr(rdi, saved_rdi);
1215 __ movptr(rsi, saved_rsi);
1216 #endif
1217 }
1218
1219
1220 // This is used in places where r10 is a scratch register, and can
1221 // be adapted if r9 is needed also.
1222 void StubGenerator::setup_arg_regs_using_thread(int nargs) {
1223 const Register saved_r15 = r9;
1224 assert(nargs == 3 || nargs == 4, "else fix");
1225 #ifdef _WIN64
1226 if (nargs == 4) {
1227 __ mov(rax, r9); // r9 is also saved_r15
1228 }
1229 __ mov(saved_r15, r15); // r15 is callee saved and needs to be restored
1230 __ get_thread(r15_thread);
1231 assert(c_rarg0 == rcx && c_rarg1 == rdx && c_rarg2 == r8 && c_rarg3 == r9,
1232 "unexpected argument registers");
1233 __ movptr(Address(r15_thread, in_bytes(JavaThread::windows_saved_rdi_offset())), rdi);
1234 __ movptr(Address(r15_thread, in_bytes(JavaThread::windows_saved_rsi_offset())), rsi);
1235
1236 __ mov(rdi, rcx); // c_rarg0
1237 __ mov(rsi, rdx); // c_rarg1
1238 __ mov(rdx, r8); // c_rarg2
1239 if (nargs == 4) {
1240 __ mov(rcx, rax); // c_rarg3 (via rax)
1241 }
1242 #else
1243 assert(c_rarg0 == rdi && c_rarg1 == rsi && c_rarg2 == rdx && c_rarg3 == rcx,
1244 "unexpected argument registers");
1245 #endif
1246 DEBUG_ONLY(_regs_in_thread = true;)
1247 }
1248
1249
1250 void StubGenerator::restore_arg_regs_using_thread() {
1251 assert(_regs_in_thread, "wrong call to restore_arg_regs");
1252 const Register saved_r15 = r9;
1253 #ifdef _WIN64
1254 __ get_thread(r15_thread);
1255 __ movptr(rsi, Address(r15_thread, in_bytes(JavaThread::windows_saved_rsi_offset())));
1256 __ movptr(rdi, Address(r15_thread, in_bytes(JavaThread::windows_saved_rdi_offset())));
1257 __ mov(r15, saved_r15); // r15 is callee saved and needs to be restored
1258 #endif
1259 }
1260
1261
1262 void StubGenerator::setup_argument_regs(BasicType type) {
1263 if (type == T_BYTE || type == T_SHORT) {
1264 setup_arg_regs(); // from => rdi, to => rsi, count => rdx
1265 // r9 and r10 may be used to save non-volatile registers
1266 } else {
1267 setup_arg_regs_using_thread(); // from => rdi, to => rsi, count => rdx
1268 // r9 is used to save r15_thread
1269 }
1270 }
1271
1272
1273 void StubGenerator::restore_argument_regs(BasicType type) {
1274 if (type == T_BYTE || type == T_SHORT) {
1275 restore_arg_regs();
1276 } else {
1277 restore_arg_regs_using_thread();
1278 }
1279 }
1280
1281 address StubGenerator::generate_data_cache_writeback() {
1282 const Register src = c_rarg0; // source address
1283
1284 __ align(CodeEntryAlignment);
1285
1286 StubCodeMark mark(this, "StubRoutines", "_data_cache_writeback");
1287
1288 address start = __ pc();
1289
1290 __ enter();
1291 __ cache_wb(Address(src, 0));
1292 __ leave();
1293 __ ret(0);
1294
1295 return start;
1296 }
1297
1298 address StubGenerator::generate_data_cache_writeback_sync() {
1299 const Register is_pre = c_rarg0; // pre or post sync
1300
1301 __ align(CodeEntryAlignment);
1302
1303 StubCodeMark mark(this, "StubRoutines", "_data_cache_writeback_sync");
1304
1305 // pre wbsync is a no-op
1306 // post wbsync translates to an sfence
1307
1308 Label skip;
1309 address start = __ pc();
1310
1311 __ enter();
1312 __ cmpl(is_pre, 0);
1313 __ jcc(Assembler::notEqual, skip);
1314 __ cache_wbsync(false);
1315 __ bind(skip);
1316 __ leave();
1317 __ ret(0);
1318
1319 return start;
1320 }
1321
1322 // ofs and limit are use for multi-block byte array.
1323 // int com.sun.security.provider.MD5.implCompress(byte[] b, int ofs)
1324 address StubGenerator::generate_md5_implCompress(bool multi_block, const char *name) {
1325 __ align(CodeEntryAlignment);
1326 StubCodeMark mark(this, "StubRoutines", name);
1327 address start = __ pc();
1328
1329 const Register buf_param = r15;
1330 const Address state_param(rsp, 0 * wordSize);
1331 const Address ofs_param (rsp, 1 * wordSize );
1332 const Address limit_param(rsp, 1 * wordSize + 4);
1333
1334 __ enter();
1335 __ push(rbx);
1336 __ push(rdi);
1337 __ push(rsi);
1338 __ push(r15);
1339 __ subptr(rsp, 2 * wordSize);
1340
1341 __ movptr(buf_param, c_rarg0);
1342 __ movptr(state_param, c_rarg1);
1343 if (multi_block) {
1344 __ movl(ofs_param, c_rarg2);
1345 __ movl(limit_param, c_rarg3);
1346 }
1347 __ fast_md5(buf_param, state_param, ofs_param, limit_param, multi_block);
1348
1349 __ addptr(rsp, 2 * wordSize);
1350 __ pop(r15);
1351 __ pop(rsi);
1352 __ pop(rdi);
1353 __ pop(rbx);
1354 __ leave();
1355 __ ret(0);
1356
1357 return start;
1358 }
1359
1360 address StubGenerator::generate_upper_word_mask() {
1361 __ align64();
1362 StubCodeMark mark(this, "StubRoutines", "upper_word_mask");
1363 address start = __ pc();
1364
1365 __ emit_data64(0x0000000000000000, relocInfo::none);
1366 __ emit_data64(0xFFFFFFFF00000000, relocInfo::none);
1367
1368 return start;
1369 }
1370
1371 address StubGenerator::generate_shuffle_byte_flip_mask() {
1372 __ align64();
1373 StubCodeMark mark(this, "StubRoutines", "shuffle_byte_flip_mask");
1374 address start = __ pc();
1375
1376 __ emit_data64(0x08090a0b0c0d0e0f, relocInfo::none);
1377 __ emit_data64(0x0001020304050607, relocInfo::none);
1378
1379 return start;
1380 }
1381
1382 // ofs and limit are use for multi-block byte array.
1383 // int com.sun.security.provider.DigestBase.implCompressMultiBlock(byte[] b, int ofs, int limit)
1384 address StubGenerator::generate_sha1_implCompress(bool multi_block, const char *name) {
1385 __ align(CodeEntryAlignment);
1386 StubCodeMark mark(this, "StubRoutines", name);
1387 address start = __ pc();
1388
1389 Register buf = c_rarg0;
1390 Register state = c_rarg1;
1391 Register ofs = c_rarg2;
1392 Register limit = c_rarg3;
1393
1394 const XMMRegister abcd = xmm0;
1395 const XMMRegister e0 = xmm1;
1396 const XMMRegister e1 = xmm2;
1397 const XMMRegister msg0 = xmm3;
1398
1399 const XMMRegister msg1 = xmm4;
1400 const XMMRegister msg2 = xmm5;
1401 const XMMRegister msg3 = xmm6;
1402 const XMMRegister shuf_mask = xmm7;
1403
1404 __ enter();
1405
1406 __ subptr(rsp, 4 * wordSize);
1407
1408 __ fast_sha1(abcd, e0, e1, msg0, msg1, msg2, msg3, shuf_mask,
1409 buf, state, ofs, limit, rsp, multi_block);
1410
1411 __ addptr(rsp, 4 * wordSize);
1412
1413 __ leave();
1414 __ ret(0);
1415
1416 return start;
1417 }
1418
1419 address StubGenerator::generate_pshuffle_byte_flip_mask() {
1420 __ align64();
1421 StubCodeMark mark(this, "StubRoutines", "pshuffle_byte_flip_mask");
1422 address start = __ pc();
1423
1424 __ emit_data64(0x0405060700010203, relocInfo::none);
1425 __ emit_data64(0x0c0d0e0f08090a0b, relocInfo::none);
1426
1427 if (VM_Version::supports_avx2()) {
1428 __ emit_data64(0x0405060700010203, relocInfo::none); // second copy
1429 __ emit_data64(0x0c0d0e0f08090a0b, relocInfo::none);
1430 // _SHUF_00BA
1431 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1432 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1433 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1434 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1435 // _SHUF_DC00
1436 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1437 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1438 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1439 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1440 }
1441
1442 return start;
1443 }
1444
1445 //Mask for byte-swapping a couple of qwords in an XMM register using (v)pshufb.
1446 address StubGenerator::generate_pshuffle_byte_flip_mask_sha512() {
1447 __ align32();
1448 StubCodeMark mark(this, "StubRoutines", "pshuffle_byte_flip_mask_sha512");
1449 address start = __ pc();
1450
1451 if (VM_Version::supports_avx2()) {
1452 __ emit_data64(0x0001020304050607, relocInfo::none); // PSHUFFLE_BYTE_FLIP_MASK
1453 __ emit_data64(0x08090a0b0c0d0e0f, relocInfo::none);
1454 __ emit_data64(0x1011121314151617, relocInfo::none);
1455 __ emit_data64(0x18191a1b1c1d1e1f, relocInfo::none);
1456 __ emit_data64(0x0000000000000000, relocInfo::none); //MASK_YMM_LO
1457 __ emit_data64(0x0000000000000000, relocInfo::none);
1458 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1459 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1460 }
1461
1462 return start;
1463 }
1464
1465 // ofs and limit are use for multi-block byte array.
1466 // int com.sun.security.provider.DigestBase.implCompressMultiBlock(byte[] b, int ofs, int limit)
1467 address StubGenerator::generate_sha256_implCompress(bool multi_block, const char *name) {
1468 assert(VM_Version::supports_sha() || VM_Version::supports_avx2(), "");
1469 __ align(CodeEntryAlignment);
1470 StubCodeMark mark(this, "StubRoutines", name);
1471 address start = __ pc();
1472
1473 Register buf = c_rarg0;
1474 Register state = c_rarg1;
1475 Register ofs = c_rarg2;
1476 Register limit = c_rarg3;
1477
1478 const XMMRegister msg = xmm0;
1479 const XMMRegister state0 = xmm1;
1480 const XMMRegister state1 = xmm2;
1481 const XMMRegister msgtmp0 = xmm3;
1482
1483 const XMMRegister msgtmp1 = xmm4;
1484 const XMMRegister msgtmp2 = xmm5;
1485 const XMMRegister msgtmp3 = xmm6;
1486 const XMMRegister msgtmp4 = xmm7;
1487
1488 const XMMRegister shuf_mask = xmm8;
1489
1490 __ enter();
1491
1492 __ subptr(rsp, 4 * wordSize);
1493
1494 if (VM_Version::supports_sha()) {
1495 __ fast_sha256(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
1496 buf, state, ofs, limit, rsp, multi_block, shuf_mask);
1497 } else if (VM_Version::supports_avx2()) {
1498 __ sha256_AVX2(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
1499 buf, state, ofs, limit, rsp, multi_block, shuf_mask);
1500 }
1501 __ addptr(rsp, 4 * wordSize);
1502 __ vzeroupper();
1503 __ leave();
1504 __ ret(0);
1505
1506 return start;
1507 }
1508
1509 address StubGenerator::generate_sha512_implCompress(bool multi_block, const char *name) {
1510 assert(VM_Version::supports_avx2(), "");
1511 assert(VM_Version::supports_bmi2(), "");
1512 __ align(CodeEntryAlignment);
1513 StubCodeMark mark(this, "StubRoutines", name);
1514 address start = __ pc();
1515
1516 Register buf = c_rarg0;
1517 Register state = c_rarg1;
1518 Register ofs = c_rarg2;
1519 Register limit = c_rarg3;
1520
1521 const XMMRegister msg = xmm0;
1522 const XMMRegister state0 = xmm1;
1523 const XMMRegister state1 = xmm2;
1524 const XMMRegister msgtmp0 = xmm3;
1525 const XMMRegister msgtmp1 = xmm4;
1526 const XMMRegister msgtmp2 = xmm5;
1527 const XMMRegister msgtmp3 = xmm6;
1528 const XMMRegister msgtmp4 = xmm7;
1529
1530 const XMMRegister shuf_mask = xmm8;
1531
1532 __ enter();
1533
1534 __ sha512_AVX2(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
1535 buf, state, ofs, limit, rsp, multi_block, shuf_mask);
1536
1537 __ vzeroupper();
1538 __ leave();
1539 __ ret(0);
1540
1541 return start;
1542 }
1543
1544 address StubGenerator::base64_shuffle_addr() {
1545 __ align64();
1546 StubCodeMark mark(this, "StubRoutines", "shuffle_base64");
1547 address start = __ pc();
1548
1549 assert(((unsigned long long)start & 0x3f) == 0,
1550 "Alignment problem (0x%08llx)", (unsigned long long)start);
1551 __ emit_data64(0x0405030401020001, relocInfo::none);
1552 __ emit_data64(0x0a0b090a07080607, relocInfo::none);
1553 __ emit_data64(0x10110f100d0e0c0d, relocInfo::none);
1554 __ emit_data64(0x1617151613141213, relocInfo::none);
1555 __ emit_data64(0x1c1d1b1c191a1819, relocInfo::none);
1556 __ emit_data64(0x222321221f201e1f, relocInfo::none);
1557 __ emit_data64(0x2829272825262425, relocInfo::none);
1558 __ emit_data64(0x2e2f2d2e2b2c2a2b, relocInfo::none);
1559
1560 return start;
1561 }
1562
1563 address StubGenerator::base64_avx2_shuffle_addr() {
1564 __ align32();
1565 StubCodeMark mark(this, "StubRoutines", "avx2_shuffle_base64");
1566 address start = __ pc();
1567
1568 __ emit_data64(0x0809070805060405, relocInfo::none);
1569 __ emit_data64(0x0e0f0d0e0b0c0a0b, relocInfo::none);
1570 __ emit_data64(0x0405030401020001, relocInfo::none);
1571 __ emit_data64(0x0a0b090a07080607, relocInfo::none);
1572
1573 return start;
1574 }
1575
1576 address StubGenerator::base64_avx2_input_mask_addr() {
1577 __ align32();
1578 StubCodeMark mark(this, "StubRoutines", "avx2_input_mask_base64");
1579 address start = __ pc();
1580
1581 __ emit_data64(0x8000000000000000, relocInfo::none);
1582 __ emit_data64(0x8000000080000000, relocInfo::none);
1583 __ emit_data64(0x8000000080000000, relocInfo::none);
1584 __ emit_data64(0x8000000080000000, relocInfo::none);
1585
1586 return start;
1587 }
1588
1589 address StubGenerator::base64_avx2_lut_addr() {
1590 __ align32();
1591 StubCodeMark mark(this, "StubRoutines", "avx2_lut_base64");
1592 address start = __ pc();
1593
1594 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
1595 __ emit_data64(0x0000f0edfcfcfcfc, relocInfo::none);
1596 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
1597 __ emit_data64(0x0000f0edfcfcfcfc, relocInfo::none);
1598
1599 // URL LUT
1600 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
1601 __ emit_data64(0x000020effcfcfcfc, relocInfo::none);
1602 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
1603 __ emit_data64(0x000020effcfcfcfc, relocInfo::none);
1604
1605 return start;
1606 }
1607
1608 address StubGenerator::base64_encoding_table_addr() {
1609 __ align64();
1610 StubCodeMark mark(this, "StubRoutines", "encoding_table_base64");
1611 address start = __ pc();
1612
1613 assert(((unsigned long long)start & 0x3f) == 0, "Alignment problem (0x%08llx)", (unsigned long long)start);
1614 __ emit_data64(0x4847464544434241, relocInfo::none);
1615 __ emit_data64(0x504f4e4d4c4b4a49, relocInfo::none);
1616 __ emit_data64(0x5857565554535251, relocInfo::none);
1617 __ emit_data64(0x6665646362615a59, relocInfo::none);
1618 __ emit_data64(0x6e6d6c6b6a696867, relocInfo::none);
1619 __ emit_data64(0x767574737271706f, relocInfo::none);
1620 __ emit_data64(0x333231307a797877, relocInfo::none);
1621 __ emit_data64(0x2f2b393837363534, relocInfo::none);
1622
1623 // URL table
1624 __ emit_data64(0x4847464544434241, relocInfo::none);
1625 __ emit_data64(0x504f4e4d4c4b4a49, relocInfo::none);
1626 __ emit_data64(0x5857565554535251, relocInfo::none);
1627 __ emit_data64(0x6665646362615a59, relocInfo::none);
1628 __ emit_data64(0x6e6d6c6b6a696867, relocInfo::none);
1629 __ emit_data64(0x767574737271706f, relocInfo::none);
1630 __ emit_data64(0x333231307a797877, relocInfo::none);
1631 __ emit_data64(0x5f2d393837363534, relocInfo::none);
1632
1633 return start;
1634 }
1635
1636 // Code for generating Base64 encoding.
1637 // Intrinsic function prototype in Base64.java:
1638 // private void encodeBlock(byte[] src, int sp, int sl, byte[] dst, int dp,
1639 // boolean isURL) {
1640 address StubGenerator::generate_base64_encodeBlock()
1641 {
1642 __ align(CodeEntryAlignment);
1643 StubCodeMark mark(this, "StubRoutines", "implEncode");
1644 address start = __ pc();
1645
1646 __ enter();
1647
1648 // Save callee-saved registers before using them
1649 __ push(r12);
1650 __ push(r13);
1651 __ push(r14);
1652 __ push(r15);
1653
1654 // arguments
1655 const Register source = c_rarg0; // Source Array
1656 const Register start_offset = c_rarg1; // start offset
1657 const Register end_offset = c_rarg2; // end offset
1658 const Register dest = c_rarg3; // destination array
1659
1660 #ifndef _WIN64
1661 const Register dp = c_rarg4; // Position for writing to dest array
1662 const Register isURL = c_rarg5; // Base64 or URL character set
1663 #else
1664 const Address dp_mem(rbp, 6 * wordSize); // length is on stack on Win64
1665 const Address isURL_mem(rbp, 7 * wordSize);
1666 const Register isURL = r10; // pick the volatile windows register
1667 const Register dp = r12;
1668 __ movl(dp, dp_mem);
1669 __ movl(isURL, isURL_mem);
1670 #endif
1671
1672 const Register length = r14;
1673 const Register encode_table = r13;
1674 Label L_process3, L_exit, L_processdata, L_vbmiLoop, L_not512, L_32byteLoop;
1675
1676 // calculate length from offsets
1677 __ movl(length, end_offset);
1678 __ subl(length, start_offset);
1679 __ jcc(Assembler::lessEqual, L_exit);
1680
1681 // Code for 512-bit VBMI encoding. Encodes 48 input bytes into 64
1682 // output bytes. We read 64 input bytes and ignore the last 16, so be
1683 // sure not to read past the end of the input buffer.
1684 if (VM_Version::supports_avx512_vbmi()) {
1685 __ cmpl(length, 64); // Do not overrun input buffer.
1686 __ jcc(Assembler::below, L_not512);
1687
1688 __ shll(isURL, 6); // index into decode table based on isURL
1689 __ lea(encode_table, ExternalAddress(StubRoutines::x86::base64_encoding_table_addr()));
1690 __ addptr(encode_table, isURL);
1691 __ shrl(isURL, 6); // restore isURL
1692
1693 __ mov64(rax, 0x3036242a1016040aull); // Shifts
1694 __ evmovdquq(xmm3, ExternalAddress(StubRoutines::x86::base64_shuffle_addr()), Assembler::AVX_512bit, r15);
1695 __ evmovdquq(xmm2, Address(encode_table, 0), Assembler::AVX_512bit);
1696 __ evpbroadcastq(xmm1, rax, Assembler::AVX_512bit);
1697
1698 __ align32();
1699 __ BIND(L_vbmiLoop);
1700
1701 __ vpermb(xmm0, xmm3, Address(source, start_offset), Assembler::AVX_512bit);
1702 __ subl(length, 48);
1703
1704 // Put the input bytes into the proper lanes for writing, then
1705 // encode them.
1706 __ evpmultishiftqb(xmm0, xmm1, xmm0, Assembler::AVX_512bit);
1707 __ vpermb(xmm0, xmm0, xmm2, Assembler::AVX_512bit);
1708
1709 // Write to destination
1710 __ evmovdquq(Address(dest, dp), xmm0, Assembler::AVX_512bit);
1711
1712 __ addptr(dest, 64);
1713 __ addptr(source, 48);
1714 __ cmpl(length, 64);
1715 __ jcc(Assembler::aboveEqual, L_vbmiLoop);
1716
1717 __ vzeroupper();
1718 }
1719
1720 __ BIND(L_not512);
1721 if (VM_Version::supports_avx2()) {
1722 /*
1723 ** This AVX2 encoder is based off the paper at:
1724 ** https://dl.acm.org/doi/10.1145/3132709
1725 **
1726 ** We use AVX2 SIMD instructions to encode 24 bytes into 32
1727 ** output bytes.
1728 **
1729 */
1730 // Lengths under 32 bytes are done with scalar routine
1731 __ cmpl(length, 31);
1732 __ jcc(Assembler::belowEqual, L_process3);
1733
1734 // Set up supporting constant table data
1735 __ vmovdqu(xmm9, ExternalAddress(StubRoutines::x86::base64_avx2_shuffle_addr()), rax);
1736 // 6-bit mask for 2nd and 4th (and multiples) 6-bit values
1737 __ movl(rax, 0x0fc0fc00);
1738 __ movdl(xmm8, rax);
1739 __ vmovdqu(xmm1, ExternalAddress(StubRoutines::x86::base64_avx2_input_mask_addr()), rax);
1740 __ vpbroadcastd(xmm8, xmm8, Assembler::AVX_256bit);
1741
1742 // Multiplication constant for "shifting" right by 6 and 10
1743 // bits
1744 __ movl(rax, 0x04000040);
1745
1746 __ subl(length, 24);
1747 __ movdl(xmm7, rax);
1748 __ vpbroadcastd(xmm7, xmm7, Assembler::AVX_256bit);
1749
1750 // For the first load, we mask off reading of the first 4
1751 // bytes into the register. This is so we can get 4 3-byte
1752 // chunks into each lane of the register, avoiding having to
1753 // handle end conditions. We then shuffle these bytes into a
1754 // specific order so that manipulation is easier.
1755 //
1756 // The initial read loads the XMM register like this:
1757 //
1758 // Lower 128-bit lane:
1759 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
1760 // | XX | XX | XX | XX | A0 | A1 | A2 | B0 | B1 | B2 | C0 | C1
1761 // | C2 | D0 | D1 | D2 |
1762 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
1763 //
1764 // Upper 128-bit lane:
1765 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
1766 // | E0 | E1 | E2 | F0 | F1 | F2 | G0 | G1 | G2 | H0 | H1 | H2
1767 // | XX | XX | XX | XX |
1768 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
1769 //
1770 // Where A0 is the first input byte, B0 is the fourth, etc.
1771 // The alphabetical significance denotes the 3 bytes to be
1772 // consumed and encoded into 4 bytes.
1773 //
1774 // We then shuffle the register so each 32-bit word contains
1775 // the sequence:
1776 // A1 A0 A2 A1, B1, B0, B2, B1, etc.
1777 // Each of these byte sequences are then manipulated into 4
1778 // 6-bit values ready for encoding.
1779 //
1780 // If we focus on one set of 3-byte chunks, changing the
1781 // nomenclature such that A0 => a, A1 => b, and A2 => c, we
1782 // shuffle such that each 24-bit chunk contains:
1783 //
1784 // b7 b6 b5 b4 b3 b2 b1 b0 | a7 a6 a5 a4 a3 a2 a1 a0 | c7 c6
1785 // c5 c4 c3 c2 c1 c0 | b7 b6 b5 b4 b3 b2 b1 b0
1786 // Explain this step.
1787 // b3 b2 b1 b0 c5 c4 c3 c2 | c1 c0 d5 d4 d3 d2 d1 d0 | a5 a4
1788 // a3 a2 a1 a0 b5 b4 | b3 b2 b1 b0 c5 c4 c3 c2
1789 //
1790 // W first and off all but bits 4-9 and 16-21 (c5..c0 and
1791 // a5..a0) and shift them using a vector multiplication
1792 // operation (vpmulhuw) which effectively shifts c right by 6
1793 // bits and a right by 10 bits. We similarly mask bits 10-15
1794 // (d5..d0) and 22-27 (b5..b0) and shift them left by 8 and 4
1795 // bits respectively. This is done using vpmullw. We end up
1796 // with 4 6-bit values, thus splitting the 3 input bytes,
1797 // ready for encoding:
1798 // 0 0 d5..d0 0 0 c5..c0 0 0 b5..b0 0 0 a5..a0
1799 //
1800 // For translation, we recognize that there are 5 distinct
1801 // ranges of legal Base64 characters as below:
1802 //
1803 // +-------------+-------------+------------+
1804 // | 6-bit value | ASCII range | offset |
1805 // +-------------+-------------+------------+
1806 // | 0..25 | A..Z | 65 |
1807 // | 26..51 | a..z | 71 |
1808 // | 52..61 | 0..9 | -4 |
1809 // | 62 | + or - | -19 or -17 |
1810 // | 63 | / or _ | -16 or 32 |
1811 // +-------------+-------------+------------+
1812 //
1813 // We note that vpshufb does a parallel lookup in a
1814 // destination register using the lower 4 bits of bytes from a
1815 // source register. If we use a saturated subtraction and
1816 // subtract 51 from each 6-bit value, bytes from [0,51]
1817 // saturate to 0, and [52,63] map to a range of [1,12]. We
1818 // distinguish the [0,25] and [26,51] ranges by assigning a
1819 // value of 13 for all 6-bit values less than 26. We end up
1820 // with:
1821 //
1822 // +-------------+-------------+------------+
1823 // | 6-bit value | Reduced | offset |
1824 // +-------------+-------------+------------+
1825 // | 0..25 | 13 | 65 |
1826 // | 26..51 | 0 | 71 |
1827 // | 52..61 | 0..9 | -4 |
1828 // | 62 | 11 | -19 or -17 |
1829 // | 63 | 12 | -16 or 32 |
1830 // +-------------+-------------+------------+
1831 //
1832 // We then use a final vpshufb to add the appropriate offset,
1833 // translating the bytes.
1834 //
1835 // Load input bytes - only 28 bytes. Mask the first load to
1836 // not load into the full register.
1837 __ vpmaskmovd(xmm1, xmm1, Address(source, start_offset, Address::times_1, -4), Assembler::AVX_256bit);
1838
1839 // Move 3-byte chunks of input (12 bytes) into 16 bytes,
1840 // ordering by:
1841 // 1, 0, 2, 1; 4, 3, 5, 4; etc. This groups 6-bit chunks
1842 // for easy masking
1843 __ vpshufb(xmm1, xmm1, xmm9, Assembler::AVX_256bit);
1844
1845 __ addl(start_offset, 24);
1846
1847 // Load masking register for first and third (and multiples)
1848 // 6-bit values.
1849 __ movl(rax, 0x003f03f0);
1850 __ movdl(xmm6, rax);
1851 __ vpbroadcastd(xmm6, xmm6, Assembler::AVX_256bit);
1852 // Multiplication constant for "shifting" left by 4 and 8 bits
1853 __ movl(rax, 0x01000010);
1854 __ movdl(xmm5, rax);
1855 __ vpbroadcastd(xmm5, xmm5, Assembler::AVX_256bit);
1856
1857 // Isolate 6-bit chunks of interest
1858 __ vpand(xmm0, xmm8, xmm1, Assembler::AVX_256bit);
1859
1860 // Load constants for encoding
1861 __ movl(rax, 0x19191919);
1862 __ movdl(xmm3, rax);
1863 __ vpbroadcastd(xmm3, xmm3, Assembler::AVX_256bit);
1864 __ movl(rax, 0x33333333);
1865 __ movdl(xmm4, rax);
1866 __ vpbroadcastd(xmm4, xmm4, Assembler::AVX_256bit);
1867
1868 // Shift output bytes 0 and 2 into proper lanes
1869 __ vpmulhuw(xmm2, xmm0, xmm7, Assembler::AVX_256bit);
1870
1871 // Mask and shift output bytes 1 and 3 into proper lanes and
1872 // combine
1873 __ vpand(xmm0, xmm6, xmm1, Assembler::AVX_256bit);
1874 __ vpmullw(xmm0, xmm5, xmm0, Assembler::AVX_256bit);
1875 __ vpor(xmm0, xmm0, xmm2, Assembler::AVX_256bit);
1876
1877 // Find out which are 0..25. This indicates which input
1878 // values fall in the range of 'A'-'Z', which require an
1879 // additional offset (see comments above)
1880 __ vpcmpgtb(xmm2, xmm0, xmm3, Assembler::AVX_256bit);
1881 __ vpsubusb(xmm1, xmm0, xmm4, Assembler::AVX_256bit);
1882 __ vpsubb(xmm1, xmm1, xmm2, Assembler::AVX_256bit);
1883
1884 // Load the proper lookup table
1885 __ lea(r11, ExternalAddress(StubRoutines::x86::base64_avx2_lut_addr()));
1886 __ movl(r15, isURL);
1887 __ shll(r15, 5);
1888 __ vmovdqu(xmm2, Address(r11, r15));
1889
1890 // Shuffle the offsets based on the range calculation done
1891 // above. This allows us to add the correct offset to the
1892 // 6-bit value corresponding to the range documented above.
1893 __ vpshufb(xmm1, xmm2, xmm1, Assembler::AVX_256bit);
1894 __ vpaddb(xmm0, xmm1, xmm0, Assembler::AVX_256bit);
1895
1896 // Store the encoded bytes
1897 __ vmovdqu(Address(dest, dp), xmm0);
1898 __ addl(dp, 32);
1899
1900 __ cmpl(length, 31);
1901 __ jcc(Assembler::belowEqual, L_process3);
1902
1903 __ align32();
1904 __ BIND(L_32byteLoop);
1905
1906 // Get next 32 bytes
1907 __ vmovdqu(xmm1, Address(source, start_offset, Address::times_1, -4));
1908
1909 __ subl(length, 24);
1910 __ addl(start_offset, 24);
1911
1912 // This logic is identical to the above, with only constant
1913 // register loads removed. Shuffle the input, mask off 6-bit
1914 // chunks, shift them into place, then add the offset to
1915 // encode.
1916 __ vpshufb(xmm1, xmm1, xmm9, Assembler::AVX_256bit);
1917
1918 __ vpand(xmm0, xmm8, xmm1, Assembler::AVX_256bit);
1919 __ vpmulhuw(xmm10, xmm0, xmm7, Assembler::AVX_256bit);
1920 __ vpand(xmm0, xmm6, xmm1, Assembler::AVX_256bit);
1921 __ vpmullw(xmm0, xmm5, xmm0, Assembler::AVX_256bit);
1922 __ vpor(xmm0, xmm0, xmm10, Assembler::AVX_256bit);
1923 __ vpcmpgtb(xmm10, xmm0, xmm3, Assembler::AVX_256bit);
1924 __ vpsubusb(xmm1, xmm0, xmm4, Assembler::AVX_256bit);
1925 __ vpsubb(xmm1, xmm1, xmm10, Assembler::AVX_256bit);
1926 __ vpshufb(xmm1, xmm2, xmm1, Assembler::AVX_256bit);
1927 __ vpaddb(xmm0, xmm1, xmm0, Assembler::AVX_256bit);
1928
1929 // Store the encoded bytes
1930 __ vmovdqu(Address(dest, dp), xmm0);
1931 __ addl(dp, 32);
1932
1933 __ cmpl(length, 31);
1934 __ jcc(Assembler::above, L_32byteLoop);
1935
1936 __ BIND(L_process3);
1937 __ vzeroupper();
1938 } else {
1939 __ BIND(L_process3);
1940 }
1941
1942 __ cmpl(length, 3);
1943 __ jcc(Assembler::below, L_exit);
1944
1945 // Load the encoding table based on isURL
1946 __ lea(r11, ExternalAddress(StubRoutines::x86::base64_encoding_table_addr()));
1947 __ movl(r15, isURL);
1948 __ shll(r15, 6);
1949 __ addptr(r11, r15);
1950
1951 __ BIND(L_processdata);
1952
1953 // Load 3 bytes
1954 __ load_unsigned_byte(r15, Address(source, start_offset));
1955 __ load_unsigned_byte(r10, Address(source, start_offset, Address::times_1, 1));
1956 __ load_unsigned_byte(r13, Address(source, start_offset, Address::times_1, 2));
1957
1958 // Build a 32-bit word with bytes 1, 2, 0, 1
1959 __ movl(rax, r10);
1960 __ shll(r10, 24);
1961 __ orl(rax, r10);
1962
1963 __ subl(length, 3);
1964
1965 __ shll(r15, 8);
1966 __ shll(r13, 16);
1967 __ orl(rax, r15);
1968
1969 __ addl(start_offset, 3);
1970
1971 __ orl(rax, r13);
1972 // At this point, rax contains | byte1 | byte2 | byte0 | byte1
1973 // r13 has byte2 << 16 - need low-order 6 bits to translate.
1974 // This translated byte is the fourth output byte.
1975 __ shrl(r13, 16);
1976 __ andl(r13, 0x3f);
1977
1978 // The high-order 6 bits of r15 (byte0) is translated.
1979 // The translated byte is the first output byte.
1980 __ shrl(r15, 10);
1981
1982 __ load_unsigned_byte(r13, Address(r11, r13));
1983 __ load_unsigned_byte(r15, Address(r11, r15));
1984
1985 __ movb(Address(dest, dp, Address::times_1, 3), r13);
1986
1987 // Extract high-order 4 bits of byte1 and low-order 2 bits of byte0.
1988 // This translated byte is the second output byte.
1989 __ shrl(rax, 4);
1990 __ movl(r10, rax);
1991 __ andl(rax, 0x3f);
1992
1993 __ movb(Address(dest, dp, Address::times_1, 0), r15);
1994
1995 __ load_unsigned_byte(rax, Address(r11, rax));
1996
1997 // Extract low-order 2 bits of byte1 and high-order 4 bits of byte2.
1998 // This translated byte is the third output byte.
1999 __ shrl(r10, 18);
2000 __ andl(r10, 0x3f);
2001
2002 __ load_unsigned_byte(r10, Address(r11, r10));
2003
2004 __ movb(Address(dest, dp, Address::times_1, 1), rax);
2005 __ movb(Address(dest, dp, Address::times_1, 2), r10);
2006
2007 __ addl(dp, 4);
2008 __ cmpl(length, 3);
2009 __ jcc(Assembler::aboveEqual, L_processdata);
2010
2011 __ BIND(L_exit);
2012 __ pop(r15);
2013 __ pop(r14);
2014 __ pop(r13);
2015 __ pop(r12);
2016 __ leave();
2017 __ ret(0);
2018
2019 return start;
2020 }
2021
2022 // base64 AVX512vbmi tables
2023 address StubGenerator::base64_vbmi_lookup_lo_addr() {
2024 __ align64();
2025 StubCodeMark mark(this, "StubRoutines", "lookup_lo_base64");
2026 address start = __ pc();
2027
2028 assert(((unsigned long long)start & 0x3f) == 0,
2029 "Alignment problem (0x%08llx)", (unsigned long long)start);
2030 __ emit_data64(0x8080808080808080, relocInfo::none);
2031 __ emit_data64(0x8080808080808080, relocInfo::none);
2032 __ emit_data64(0x8080808080808080, relocInfo::none);
2033 __ emit_data64(0x8080808080808080, relocInfo::none);
2034 __ emit_data64(0x8080808080808080, relocInfo::none);
2035 __ emit_data64(0x3f8080803e808080, relocInfo::none);
2036 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2037 __ emit_data64(0x8080808080803d3c, relocInfo::none);
2038
2039 return start;
2040 }
2041
2042 address StubGenerator::base64_vbmi_lookup_hi_addr() {
2043 __ align64();
2044 StubCodeMark mark(this, "StubRoutines", "lookup_hi_base64");
2045 address start = __ pc();
2046
2047 assert(((unsigned long long)start & 0x3f) == 0,
2048 "Alignment problem (0x%08llx)", (unsigned long long)start);
2049 __ emit_data64(0x0605040302010080, relocInfo::none);
2050 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2051 __ emit_data64(0x161514131211100f, relocInfo::none);
2052 __ emit_data64(0x8080808080191817, relocInfo::none);
2053 __ emit_data64(0x201f1e1d1c1b1a80, relocInfo::none);
2054 __ emit_data64(0x2827262524232221, relocInfo::none);
2055 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2056 __ emit_data64(0x8080808080333231, relocInfo::none);
2057
2058 return start;
2059 }
2060 address StubGenerator::base64_vbmi_lookup_lo_url_addr() {
2061 __ align64();
2062 StubCodeMark mark(this, "StubRoutines", "lookup_lo_base64url");
2063 address start = __ pc();
2064
2065 assert(((unsigned long long)start & 0x3f) == 0,
2066 "Alignment problem (0x%08llx)", (unsigned long long)start);
2067 __ emit_data64(0x8080808080808080, relocInfo::none);
2068 __ emit_data64(0x8080808080808080, relocInfo::none);
2069 __ emit_data64(0x8080808080808080, relocInfo::none);
2070 __ emit_data64(0x8080808080808080, relocInfo::none);
2071 __ emit_data64(0x8080808080808080, relocInfo::none);
2072 __ emit_data64(0x80803e8080808080, relocInfo::none);
2073 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2074 __ emit_data64(0x8080808080803d3c, relocInfo::none);
2075
2076 return start;
2077 }
2078
2079 address StubGenerator::base64_vbmi_lookup_hi_url_addr() {
2080 __ align64();
2081 StubCodeMark mark(this, "StubRoutines", "lookup_hi_base64url");
2082 address start = __ pc();
2083
2084 assert(((unsigned long long)start & 0x3f) == 0,
2085 "Alignment problem (0x%08llx)", (unsigned long long)start);
2086 __ emit_data64(0x0605040302010080, relocInfo::none);
2087 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2088 __ emit_data64(0x161514131211100f, relocInfo::none);
2089 __ emit_data64(0x3f80808080191817, relocInfo::none);
2090 __ emit_data64(0x201f1e1d1c1b1a80, relocInfo::none);
2091 __ emit_data64(0x2827262524232221, relocInfo::none);
2092 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2093 __ emit_data64(0x8080808080333231, relocInfo::none);
2094
2095 return start;
2096 }
2097
2098 address StubGenerator::base64_vbmi_pack_vec_addr() {
2099 __ align64();
2100 StubCodeMark mark(this, "StubRoutines", "pack_vec_base64");
2101 address start = __ pc();
2102
2103 assert(((unsigned long long)start & 0x3f) == 0,
2104 "Alignment problem (0x%08llx)", (unsigned long long)start);
2105 __ emit_data64(0x090a040506000102, relocInfo::none);
2106 __ emit_data64(0x161011120c0d0e08, relocInfo::none);
2107 __ emit_data64(0x1c1d1e18191a1415, relocInfo::none);
2108 __ emit_data64(0x292a242526202122, relocInfo::none);
2109 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2110 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2111 __ emit_data64(0x0000000000000000, relocInfo::none);
2112 __ emit_data64(0x0000000000000000, relocInfo::none);
2113
2114 return start;
2115 }
2116
2117 address StubGenerator::base64_vbmi_join_0_1_addr() {
2118 __ align64();
2119 StubCodeMark mark(this, "StubRoutines", "join_0_1_base64");
2120 address start = __ pc();
2121
2122 assert(((unsigned long long)start & 0x3f) == 0,
2123 "Alignment problem (0x%08llx)", (unsigned long long)start);
2124 __ emit_data64(0x090a040506000102, relocInfo::none);
2125 __ emit_data64(0x161011120c0d0e08, relocInfo::none);
2126 __ emit_data64(0x1c1d1e18191a1415, relocInfo::none);
2127 __ emit_data64(0x292a242526202122, relocInfo::none);
2128 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2129 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2130 __ emit_data64(0x494a444546404142, relocInfo::none);
2131 __ emit_data64(0x565051524c4d4e48, relocInfo::none);
2132
2133 return start;
2134 }
2135
2136 address StubGenerator::base64_vbmi_join_1_2_addr() {
2137 __ align64();
2138 StubCodeMark mark(this, "StubRoutines", "join_1_2_base64");
2139 address start = __ pc();
2140
2141 assert(((unsigned long long)start & 0x3f) == 0,
2142 "Alignment problem (0x%08llx)", (unsigned long long)start);
2143 __ emit_data64(0x1c1d1e18191a1415, relocInfo::none);
2144 __ emit_data64(0x292a242526202122, relocInfo::none);
2145 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2146 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2147 __ emit_data64(0x494a444546404142, relocInfo::none);
2148 __ emit_data64(0x565051524c4d4e48, relocInfo::none);
2149 __ emit_data64(0x5c5d5e58595a5455, relocInfo::none);
2150 __ emit_data64(0x696a646566606162, relocInfo::none);
2151
2152 return start;
2153 }
2154
2155 address StubGenerator::base64_vbmi_join_2_3_addr() {
2156 __ align64();
2157 StubCodeMark mark(this, "StubRoutines", "join_2_3_base64");
2158 address start = __ pc();
2159
2160 assert(((unsigned long long)start & 0x3f) == 0,
2161 "Alignment problem (0x%08llx)", (unsigned long long)start);
2162 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2163 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2164 __ emit_data64(0x494a444546404142, relocInfo::none);
2165 __ emit_data64(0x565051524c4d4e48, relocInfo::none);
2166 __ emit_data64(0x5c5d5e58595a5455, relocInfo::none);
2167 __ emit_data64(0x696a646566606162, relocInfo::none);
2168 __ emit_data64(0x767071726c6d6e68, relocInfo::none);
2169 __ emit_data64(0x7c7d7e78797a7475, relocInfo::none);
2170
2171 return start;
2172 }
2173
2174 address StubGenerator::base64_AVX2_decode_tables_addr() {
2175 __ align64();
2176 StubCodeMark mark(this, "StubRoutines", "AVX2_tables_base64");
2177 address start = __ pc();
2178
2179 assert(((unsigned long long)start & 0x3f) == 0,
2180 "Alignment problem (0x%08llx)", (unsigned long long)start);
2181 __ emit_data(0x2f2f2f2f, relocInfo::none, 0);
2182 __ emit_data(0x5f5f5f5f, relocInfo::none, 0); // for URL
2183
2184 __ emit_data(0xffffffff, relocInfo::none, 0);
2185 __ emit_data(0xfcfcfcfc, relocInfo::none, 0); // for URL
2186
2187 // Permute table
2188 __ emit_data64(0x0000000100000000, relocInfo::none);
2189 __ emit_data64(0x0000000400000002, relocInfo::none);
2190 __ emit_data64(0x0000000600000005, relocInfo::none);
2191 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2192
2193 // Shuffle table
2194 __ emit_data64(0x090a040506000102, relocInfo::none);
2195 __ emit_data64(0xffffffff0c0d0e08, relocInfo::none);
2196 __ emit_data64(0x090a040506000102, relocInfo::none);
2197 __ emit_data64(0xffffffff0c0d0e08, relocInfo::none);
2198
2199 // merge table
2200 __ emit_data(0x01400140, relocInfo::none, 0);
2201
2202 // merge multiplier
2203 __ emit_data(0x00011000, relocInfo::none, 0);
2204
2205 return start;
2206 }
2207
2208 address StubGenerator::base64_AVX2_decode_LUT_tables_addr() {
2209 __ align64();
2210 StubCodeMark mark(this, "StubRoutines", "AVX2_tables_URL_base64");
2211 address start = __ pc();
2212
2213 assert(((unsigned long long)start & 0x3f) == 0,
2214 "Alignment problem (0x%08llx)", (unsigned long long)start);
2215 // lut_lo
2216 __ emit_data64(0x1111111111111115, relocInfo::none);
2217 __ emit_data64(0x1a1b1b1b1a131111, relocInfo::none);
2218 __ emit_data64(0x1111111111111115, relocInfo::none);
2219 __ emit_data64(0x1a1b1b1b1a131111, relocInfo::none);
2220
2221 // lut_roll
2222 __ emit_data64(0xb9b9bfbf04131000, relocInfo::none);
2223 __ emit_data64(0x0000000000000000, relocInfo::none);
2224 __ emit_data64(0xb9b9bfbf04131000, relocInfo::none);
2225 __ emit_data64(0x0000000000000000, relocInfo::none);
2226
2227 // lut_lo URL
2228 __ emit_data64(0x1111111111111115, relocInfo::none);
2229 __ emit_data64(0x1b1b1a1b1b131111, relocInfo::none);
2230 __ emit_data64(0x1111111111111115, relocInfo::none);
2231 __ emit_data64(0x1b1b1a1b1b131111, relocInfo::none);
2232
2233 // lut_roll URL
2234 __ emit_data64(0xb9b9bfbf0411e000, relocInfo::none);
2235 __ emit_data64(0x0000000000000000, relocInfo::none);
2236 __ emit_data64(0xb9b9bfbf0411e000, relocInfo::none);
2237 __ emit_data64(0x0000000000000000, relocInfo::none);
2238
2239 // lut_hi
2240 __ emit_data64(0x0804080402011010, relocInfo::none);
2241 __ emit_data64(0x1010101010101010, relocInfo::none);
2242 __ emit_data64(0x0804080402011010, relocInfo::none);
2243 __ emit_data64(0x1010101010101010, relocInfo::none);
2244
2245 return start;
2246 }
2247
2248 address StubGenerator::base64_decoding_table_addr() {
2249 StubCodeMark mark(this, "StubRoutines", "decoding_table_base64");
2250 address start = __ pc();
2251
2252 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2253 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2254 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2255 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2256 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2257 __ emit_data64(0x3fffffff3effffff, relocInfo::none);
2258 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2259 __ emit_data64(0xffffffffffff3d3c, relocInfo::none);
2260 __ emit_data64(0x06050403020100ff, relocInfo::none);
2261 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2262 __ emit_data64(0x161514131211100f, relocInfo::none);
2263 __ emit_data64(0xffffffffff191817, relocInfo::none);
2264 __ emit_data64(0x201f1e1d1c1b1aff, relocInfo::none);
2265 __ emit_data64(0x2827262524232221, relocInfo::none);
2266 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2267 __ emit_data64(0xffffffffff333231, relocInfo::none);
2268 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2269 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2270 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2271 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2272 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2273 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2274 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2275 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2276 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2277 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2278 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2279 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2280 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2281 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2282 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2283 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2284
2285 // URL table
2286 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2287 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2288 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2289 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2290 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2291 __ emit_data64(0xffff3effffffffff, relocInfo::none);
2292 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2293 __ emit_data64(0xffffffffffff3d3c, relocInfo::none);
2294 __ emit_data64(0x06050403020100ff, relocInfo::none);
2295 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2296 __ emit_data64(0x161514131211100f, relocInfo::none);
2297 __ emit_data64(0x3fffffffff191817, relocInfo::none);
2298 __ emit_data64(0x201f1e1d1c1b1aff, relocInfo::none);
2299 __ emit_data64(0x2827262524232221, relocInfo::none);
2300 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2301 __ emit_data64(0xffffffffff333231, relocInfo::none);
2302 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2303 __ emit_data64(0xffffffffffffffff, relocInfo::none);
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(0xffffffffffffffff, relocInfo::none);
2310 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2311 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2312 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2313 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2314 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2315 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2316 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2317 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2318
2319 return start;
2320 }
2321
2322
2323 // Code for generating Base64 decoding.
2324 //
2325 // Based on the article (and associated code) from https://arxiv.org/abs/1910.05109.
2326 //
2327 // Intrinsic function prototype in Base64.java:
2328 // private void decodeBlock(byte[] src, int sp, int sl, byte[] dst, int dp, boolean isURL, isMIME) {
2329 address StubGenerator::generate_base64_decodeBlock() {
2330 __ align(CodeEntryAlignment);
2331 StubCodeMark mark(this, "StubRoutines", "implDecode");
2332 address start = __ pc();
2333
2334 __ enter();
2335
2336 // Save callee-saved registers before using them
2337 __ push(r12);
2338 __ push(r13);
2339 __ push(r14);
2340 __ push(r15);
2341 __ push(rbx);
2342
2343 // arguments
2344 const Register source = c_rarg0; // Source Array
2345 const Register start_offset = c_rarg1; // start offset
2346 const Register end_offset = c_rarg2; // end offset
2347 const Register dest = c_rarg3; // destination array
2348 const Register isMIME = rbx;
2349
2350 #ifndef _WIN64
2351 const Register dp = c_rarg4; // Position for writing to dest array
2352 const Register isURL = c_rarg5;// Base64 or URL character set
2353 __ movl(isMIME, Address(rbp, 2 * wordSize));
2354 #else
2355 const Address dp_mem(rbp, 6 * wordSize); // length is on stack on Win64
2356 const Address isURL_mem(rbp, 7 * wordSize);
2357 const Register isURL = r10; // pick the volatile windows register
2358 const Register dp = r12;
2359 __ movl(dp, dp_mem);
2360 __ movl(isURL, isURL_mem);
2361 __ movl(isMIME, Address(rbp, 8 * wordSize));
2362 #endif
2363
2364 const XMMRegister lookup_lo = xmm5;
2365 const XMMRegister lookup_hi = xmm6;
2366 const XMMRegister errorvec = xmm7;
2367 const XMMRegister pack16_op = xmm9;
2368 const XMMRegister pack32_op = xmm8;
2369 const XMMRegister input0 = xmm3;
2370 const XMMRegister input1 = xmm20;
2371 const XMMRegister input2 = xmm21;
2372 const XMMRegister input3 = xmm19;
2373 const XMMRegister join01 = xmm12;
2374 const XMMRegister join12 = xmm11;
2375 const XMMRegister join23 = xmm10;
2376 const XMMRegister translated0 = xmm2;
2377 const XMMRegister translated1 = xmm1;
2378 const XMMRegister translated2 = xmm0;
2379 const XMMRegister translated3 = xmm4;
2380
2381 const XMMRegister merged0 = xmm2;
2382 const XMMRegister merged1 = xmm1;
2383 const XMMRegister merged2 = xmm0;
2384 const XMMRegister merged3 = xmm4;
2385 const XMMRegister merge_ab_bc0 = xmm2;
2386 const XMMRegister merge_ab_bc1 = xmm1;
2387 const XMMRegister merge_ab_bc2 = xmm0;
2388 const XMMRegister merge_ab_bc3 = xmm4;
2389
2390 const XMMRegister pack24bits = xmm4;
2391
2392 const Register length = r14;
2393 const Register output_size = r13;
2394 const Register output_mask = r15;
2395 const KRegister input_mask = k1;
2396
2397 const XMMRegister input_initial_valid_b64 = xmm0;
2398 const XMMRegister tmp = xmm10;
2399 const XMMRegister mask = xmm0;
2400 const XMMRegister invalid_b64 = xmm1;
2401
2402 Label L_process256, L_process64, L_process64Loop, L_exit, L_processdata, L_loadURL;
2403 Label L_continue, L_finalBit, L_padding, L_donePadding, L_bruteForce;
2404 Label L_forceLoop, L_bottomLoop, L_checkMIME, L_exit_no_vzero, L_lastChunk;
2405
2406 // calculate length from offsets
2407 __ movl(length, end_offset);
2408 __ subl(length, start_offset);
2409 __ push(dest); // Save for return value calc
2410
2411 // If AVX512 VBMI not supported, just compile non-AVX code
2412 if(VM_Version::supports_avx512_vbmi() &&
2413 VM_Version::supports_avx512bw()) {
2414 __ cmpl(length, 31); // 32-bytes is break-even for AVX-512
2415 __ jcc(Assembler::lessEqual, L_lastChunk);
2416
2417 __ cmpl(isMIME, 0);
2418 __ jcc(Assembler::notEqual, L_lastChunk);
2419
2420 // Load lookup tables based on isURL
2421 __ cmpl(isURL, 0);
2422 __ jcc(Assembler::notZero, L_loadURL);
2423
2424 __ evmovdquq(lookup_lo, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_lo_addr()), Assembler::AVX_512bit, r13);
2425 __ evmovdquq(lookup_hi, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_hi_addr()), Assembler::AVX_512bit, r13);
2426
2427 __ BIND(L_continue);
2428
2429 __ movl(r15, 0x01400140);
2430 __ evpbroadcastd(pack16_op, r15, Assembler::AVX_512bit);
2431
2432 __ movl(r15, 0x00011000);
2433 __ evpbroadcastd(pack32_op, r15, Assembler::AVX_512bit);
2434
2435 __ cmpl(length, 0xff);
2436 __ jcc(Assembler::lessEqual, L_process64);
2437
2438 // load masks required for decoding data
2439 __ BIND(L_processdata);
2440 __ evmovdquq(join01, ExternalAddress(StubRoutines::x86::base64_vbmi_join_0_1_addr()), Assembler::AVX_512bit,r13);
2441 __ evmovdquq(join12, ExternalAddress(StubRoutines::x86::base64_vbmi_join_1_2_addr()), Assembler::AVX_512bit, r13);
2442 __ evmovdquq(join23, ExternalAddress(StubRoutines::x86::base64_vbmi_join_2_3_addr()), Assembler::AVX_512bit, r13);
2443
2444 __ align32();
2445 __ BIND(L_process256);
2446 // Grab input data
2447 __ evmovdquq(input0, Address(source, start_offset, Address::times_1, 0x00), Assembler::AVX_512bit);
2448 __ evmovdquq(input1, Address(source, start_offset, Address::times_1, 0x40), Assembler::AVX_512bit);
2449 __ evmovdquq(input2, Address(source, start_offset, Address::times_1, 0x80), Assembler::AVX_512bit);
2450 __ evmovdquq(input3, Address(source, start_offset, Address::times_1, 0xc0), Assembler::AVX_512bit);
2451
2452 // Copy the low part of the lookup table into the destination of the permutation
2453 __ evmovdquq(translated0, lookup_lo, Assembler::AVX_512bit);
2454 __ evmovdquq(translated1, lookup_lo, Assembler::AVX_512bit);
2455 __ evmovdquq(translated2, lookup_lo, Assembler::AVX_512bit);
2456 __ evmovdquq(translated3, lookup_lo, Assembler::AVX_512bit);
2457
2458 // Translate the base64 input into "decoded" bytes
2459 __ evpermt2b(translated0, input0, lookup_hi, Assembler::AVX_512bit);
2460 __ evpermt2b(translated1, input1, lookup_hi, Assembler::AVX_512bit);
2461 __ evpermt2b(translated2, input2, lookup_hi, Assembler::AVX_512bit);
2462 __ evpermt2b(translated3, input3, lookup_hi, Assembler::AVX_512bit);
2463
2464 // OR all of the translations together to check for errors (high-order bit of byte set)
2465 __ vpternlogd(input0, 0xfe, input1, input2, Assembler::AVX_512bit);
2466
2467 __ vpternlogd(input3, 0xfe, translated0, translated1, Assembler::AVX_512bit);
2468 __ vpternlogd(input0, 0xfe, translated2, translated3, Assembler::AVX_512bit);
2469 __ vpor(errorvec, input3, input0, Assembler::AVX_512bit);
2470
2471 // Check if there was an error - if so, try 64-byte chunks
2472 __ evpmovb2m(k3, errorvec, Assembler::AVX_512bit);
2473 __ kortestql(k3, k3);
2474 __ jcc(Assembler::notZero, L_process64);
2475
2476 // The merging and shuffling happens here
2477 // We multiply each byte pair [00dddddd | 00cccccc | 00bbbbbb | 00aaaaaa]
2478 // Multiply [00cccccc] by 2^6 added to [00dddddd] to get [0000cccc | ccdddddd]
2479 // The pack16_op is a vector of 0x01400140, so multiply D by 1 and C by 0x40
2480 __ vpmaddubsw(merge_ab_bc0, translated0, pack16_op, Assembler::AVX_512bit);
2481 __ vpmaddubsw(merge_ab_bc1, translated1, pack16_op, Assembler::AVX_512bit);
2482 __ vpmaddubsw(merge_ab_bc2, translated2, pack16_op, Assembler::AVX_512bit);
2483 __ vpmaddubsw(merge_ab_bc3, translated3, pack16_op, Assembler::AVX_512bit);
2484
2485 // Now do the same with packed 16-bit values.
2486 // We start with [0000cccc | ccdddddd | 0000aaaa | aabbbbbb]
2487 // pack32_op is 0x00011000 (2^12, 1), so this multiplies [0000aaaa | aabbbbbb] by 2^12
2488 // and adds [0000cccc | ccdddddd] to yield [00000000 | aaaaaabb | bbbbcccc | ccdddddd]
2489 __ vpmaddwd(merged0, merge_ab_bc0, pack32_op, Assembler::AVX_512bit);
2490 __ vpmaddwd(merged1, merge_ab_bc1, pack32_op, Assembler::AVX_512bit);
2491 __ vpmaddwd(merged2, merge_ab_bc2, pack32_op, Assembler::AVX_512bit);
2492 __ vpmaddwd(merged3, merge_ab_bc3, pack32_op, Assembler::AVX_512bit);
2493
2494 // The join vectors specify which byte from which vector goes into the outputs
2495 // One of every 4 bytes in the extended vector is zero, so we pack them into their
2496 // final positions in the register for storing (256 bytes in, 192 bytes out)
2497 __ evpermt2b(merged0, join01, merged1, Assembler::AVX_512bit);
2498 __ evpermt2b(merged1, join12, merged2, Assembler::AVX_512bit);
2499 __ evpermt2b(merged2, join23, merged3, Assembler::AVX_512bit);
2500
2501 // Store result
2502 __ evmovdquq(Address(dest, dp, Address::times_1, 0x00), merged0, Assembler::AVX_512bit);
2503 __ evmovdquq(Address(dest, dp, Address::times_1, 0x40), merged1, Assembler::AVX_512bit);
2504 __ evmovdquq(Address(dest, dp, Address::times_1, 0x80), merged2, Assembler::AVX_512bit);
2505
2506 __ addptr(source, 0x100);
2507 __ addptr(dest, 0xc0);
2508 __ subl(length, 0x100);
2509 __ cmpl(length, 64 * 4);
2510 __ jcc(Assembler::greaterEqual, L_process256);
2511
2512 // At this point, we've decoded 64 * 4 * n bytes.
2513 // The remaining length will be <= 64 * 4 - 1.
2514 // UNLESS there was an error decoding the first 256-byte chunk. In this
2515 // case, the length will be arbitrarily long.
2516 //
2517 // Note that this will be the path for MIME-encoded strings.
2518
2519 __ BIND(L_process64);
2520
2521 __ evmovdquq(pack24bits, ExternalAddress(StubRoutines::x86::base64_vbmi_pack_vec_addr()), Assembler::AVX_512bit, r13);
2522
2523 __ cmpl(length, 63);
2524 __ jcc(Assembler::lessEqual, L_finalBit);
2525
2526 __ mov64(rax, 0x0000ffffffffffff);
2527 __ kmovql(k2, rax);
2528
2529 __ align32();
2530 __ BIND(L_process64Loop);
2531
2532 // Handle first 64-byte block
2533
2534 __ evmovdquq(input0, Address(source, start_offset), Assembler::AVX_512bit);
2535 __ evmovdquq(translated0, lookup_lo, Assembler::AVX_512bit);
2536 __ evpermt2b(translated0, input0, lookup_hi, Assembler::AVX_512bit);
2537
2538 __ vpor(errorvec, translated0, input0, Assembler::AVX_512bit);
2539
2540 // Check for error and bomb out before updating dest
2541 __ evpmovb2m(k3, errorvec, Assembler::AVX_512bit);
2542 __ kortestql(k3, k3);
2543 __ jcc(Assembler::notZero, L_exit);
2544
2545 // Pack output register, selecting correct byte ordering
2546 __ vpmaddubsw(merge_ab_bc0, translated0, pack16_op, Assembler::AVX_512bit);
2547 __ vpmaddwd(merged0, merge_ab_bc0, pack32_op, Assembler::AVX_512bit);
2548 __ vpermb(merged0, pack24bits, merged0, Assembler::AVX_512bit);
2549
2550 __ evmovdqub(Address(dest, dp), k2, merged0, true, Assembler::AVX_512bit);
2551
2552 __ subl(length, 64);
2553 __ addptr(source, 64);
2554 __ addptr(dest, 48);
2555
2556 __ cmpl(length, 64);
2557 __ jcc(Assembler::greaterEqual, L_process64Loop);
2558
2559 __ cmpl(length, 0);
2560 __ jcc(Assembler::lessEqual, L_exit);
2561
2562 __ BIND(L_finalBit);
2563 // Now have 1 to 63 bytes left to decode
2564
2565 // I was going to let Java take care of the final fragment
2566 // however it will repeatedly call this routine for every 4 bytes
2567 // of input data, so handle the rest here.
2568 __ movq(rax, -1);
2569 __ bzhiq(rax, rax, length); // Input mask in rax
2570
2571 __ movl(output_size, length);
2572 __ shrl(output_size, 2); // Find (len / 4) * 3 (output length)
2573 __ lea(output_size, Address(output_size, output_size, Address::times_2, 0));
2574 // output_size in r13
2575
2576 // Strip pad characters, if any, and adjust length and mask
2577 __ cmpb(Address(source, length, Address::times_1, -1), '=');
2578 __ jcc(Assembler::equal, L_padding);
2579
2580 __ BIND(L_donePadding);
2581
2582 // Output size is (64 - output_size), output mask is (all 1s >> output_size).
2583 __ kmovql(input_mask, rax);
2584 __ movq(output_mask, -1);
2585 __ bzhiq(output_mask, output_mask, output_size);
2586
2587 // Load initial input with all valid base64 characters. Will be used
2588 // in merging source bytes to avoid masking when determining if an error occurred.
2589 __ movl(rax, 0x61616161);
2590 __ evpbroadcastd(input_initial_valid_b64, rax, Assembler::AVX_512bit);
2591
2592 // A register containing all invalid base64 decoded values
2593 __ movl(rax, 0x80808080);
2594 __ evpbroadcastd(invalid_b64, rax, Assembler::AVX_512bit);
2595
2596 // input_mask is in k1
2597 // output_size is in r13
2598 // output_mask is in r15
2599 // zmm0 - free
2600 // zmm1 - 0x00011000
2601 // zmm2 - 0x01400140
2602 // zmm3 - errorvec
2603 // zmm4 - pack vector
2604 // zmm5 - lookup_lo
2605 // zmm6 - lookup_hi
2606 // zmm7 - errorvec
2607 // zmm8 - 0x61616161
2608 // zmm9 - 0x80808080
2609
2610 // Load only the bytes from source, merging into our "fully-valid" register
2611 __ evmovdqub(input_initial_valid_b64, input_mask, Address(source, start_offset, Address::times_1, 0x0), true, Assembler::AVX_512bit);
2612
2613 // Decode all bytes within our merged input
2614 __ evmovdquq(tmp, lookup_lo, Assembler::AVX_512bit);
2615 __ evpermt2b(tmp, input_initial_valid_b64, lookup_hi, Assembler::AVX_512bit);
2616 __ evporq(mask, tmp, input_initial_valid_b64, Assembler::AVX_512bit);
2617
2618 // Check for error. Compare (decoded | initial) to all invalid.
2619 // If any bytes have their high-order bit set, then we have an error.
2620 __ evptestmb(k2, mask, invalid_b64, Assembler::AVX_512bit);
2621 __ kortestql(k2, k2);
2622
2623 // If we have an error, use the brute force loop to decode what we can (4-byte chunks).
2624 __ jcc(Assembler::notZero, L_bruteForce);
2625
2626 // Shuffle output bytes
2627 __ vpmaddubsw(tmp, tmp, pack16_op, Assembler::AVX_512bit);
2628 __ vpmaddwd(tmp, tmp, pack32_op, Assembler::AVX_512bit);
2629
2630 __ vpermb(tmp, pack24bits, tmp, Assembler::AVX_512bit);
2631 __ kmovql(k1, output_mask);
2632 __ evmovdqub(Address(dest, dp), k1, tmp, true, Assembler::AVX_512bit);
2633
2634 __ addptr(dest, output_size);
2635
2636 __ BIND(L_exit);
2637 __ vzeroupper();
2638 __ pop(rax); // Get original dest value
2639 __ subptr(dest, rax); // Number of bytes converted
2640 __ movptr(rax, dest);
2641 __ pop(rbx);
2642 __ pop(r15);
2643 __ pop(r14);
2644 __ pop(r13);
2645 __ pop(r12);
2646 __ leave();
2647 __ ret(0);
2648
2649 __ BIND(L_loadURL);
2650 __ evmovdquq(lookup_lo, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_lo_url_addr()), Assembler::AVX_512bit, r13);
2651 __ evmovdquq(lookup_hi, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_hi_url_addr()), Assembler::AVX_512bit, r13);
2652 __ jmp(L_continue);
2653
2654 __ BIND(L_padding);
2655 __ decrementq(output_size, 1);
2656 __ shrq(rax, 1);
2657
2658 __ cmpb(Address(source, length, Address::times_1, -2), '=');
2659 __ jcc(Assembler::notEqual, L_donePadding);
2660
2661 __ decrementq(output_size, 1);
2662 __ shrq(rax, 1);
2663 __ jmp(L_donePadding);
2664
2665 __ align32();
2666 __ BIND(L_bruteForce);
2667 } // End of if(avx512_vbmi)
2668
2669 if (VM_Version::supports_avx2()) {
2670 Label L_tailProc, L_topLoop, L_enterLoop;
2671
2672 __ cmpl(isMIME, 0);
2673 __ jcc(Assembler::notEqual, L_lastChunk);
2674
2675 // Check for buffer too small (for algorithm)
2676 __ subl(length, 0x2c);
2677 __ jcc(Assembler::less, L_tailProc);
2678
2679 __ shll(isURL, 2);
2680
2681 // Algorithm adapted from https://arxiv.org/abs/1704.00605, "Faster Base64
2682 // Encoding and Decoding using AVX2 Instructions". URL modifications added.
2683
2684 // Set up constants
2685 __ lea(r13, ExternalAddress(StubRoutines::x86::base64_AVX2_decode_tables_addr()));
2686 __ vpbroadcastd(xmm4, Address(r13, isURL, Address::times_1), Assembler::AVX_256bit); // 2F or 5F
2687 __ vpbroadcastd(xmm10, Address(r13, isURL, Address::times_1, 0x08), Assembler::AVX_256bit); // -1 or -4
2688 __ vmovdqu(xmm12, Address(r13, 0x10)); // permute
2689 __ vmovdqu(xmm13, Address(r13, 0x30)); // shuffle
2690 __ vpbroadcastd(xmm7, Address(r13, 0x50), Assembler::AVX_256bit); // merge
2691 __ vpbroadcastd(xmm6, Address(r13, 0x54), Assembler::AVX_256bit); // merge mult
2692
2693 __ lea(r13, ExternalAddress(StubRoutines::x86::base64_AVX2_decode_LUT_tables_addr()));
2694 __ shll(isURL, 4);
2695 __ vmovdqu(xmm11, Address(r13, isURL, Address::times_1, 0x00)); // lut_lo
2696 __ vmovdqu(xmm8, Address(r13, isURL, Address::times_1, 0x20)); // lut_roll
2697 __ shrl(isURL, 6); // restore isURL
2698 __ vmovdqu(xmm9, Address(r13, 0x80)); // lut_hi
2699 __ jmp(L_enterLoop);
2700
2701 __ align32();
2702 __ bind(L_topLoop);
2703 // Add in the offset value (roll) to get 6-bit out values
2704 __ vpaddb(xmm0, xmm0, xmm2, Assembler::AVX_256bit);
2705 // Merge and permute the output bits into appropriate output byte lanes
2706 __ vpmaddubsw(xmm0, xmm0, xmm7, Assembler::AVX_256bit);
2707 __ vpmaddwd(xmm0, xmm0, xmm6, Assembler::AVX_256bit);
2708 __ vpshufb(xmm0, xmm0, xmm13, Assembler::AVX_256bit);
2709 __ vpermd(xmm0, xmm12, xmm0, Assembler::AVX_256bit);
2710 // Store the output bytes
2711 __ vmovdqu(Address(dest, dp, Address::times_1, 0), xmm0);
2712 __ addptr(source, 0x20);
2713 __ addptr(dest, 0x18);
2714 __ subl(length, 0x20);
2715 __ jcc(Assembler::less, L_tailProc);
2716
2717 __ bind(L_enterLoop);
2718
2719 // Load in encoded string (32 bytes)
2720 __ vmovdqu(xmm2, Address(source, start_offset, Address::times_1, 0x0));
2721 // Extract the high nibble for indexing into the lut tables. High 4 bits are don't care.
2722 __ vpsrld(xmm1, xmm2, 0x4, Assembler::AVX_256bit);
2723 __ vpand(xmm1, xmm4, xmm1, Assembler::AVX_256bit);
2724 // Extract the low nibble. 5F/2F will isolate the low-order 4 bits. High 4 bits are don't care.
2725 __ vpand(xmm3, xmm2, xmm4, Assembler::AVX_256bit);
2726 // Check for special-case (0x2F or 0x5F (URL))
2727 __ vpcmpeqb(xmm0, xmm4, xmm2, Assembler::AVX_256bit);
2728 // Get the bitset based on the low nibble. vpshufb uses low-order 4 bits only.
2729 __ vpshufb(xmm3, xmm11, xmm3, Assembler::AVX_256bit);
2730 // Get the bit value of the high nibble
2731 __ vpshufb(xmm5, xmm9, xmm1, Assembler::AVX_256bit);
2732 // Make sure 2F / 5F shows as valid
2733 __ vpandn(xmm3, xmm0, xmm3, Assembler::AVX_256bit);
2734 // Make adjustment for roll index. For non-URL, this is a no-op,
2735 // for URL, this adjusts by -4. This is to properly index the
2736 // roll value for 2F / 5F.
2737 __ vpand(xmm0, xmm0, xmm10, Assembler::AVX_256bit);
2738 // If the and of the two is non-zero, we have an invalid input character
2739 __ vptest(xmm3, xmm5);
2740 // Extract the "roll" value - value to add to the input to get 6-bit out value
2741 __ vpaddb(xmm0, xmm0, xmm1, Assembler::AVX_256bit); // Handle 2F / 5F
2742 __ vpshufb(xmm0, xmm8, xmm0, Assembler::AVX_256bit);
2743 __ jcc(Assembler::equal, L_topLoop); // Fall through on error
2744
2745 __ bind(L_tailProc);
2746
2747 __ addl(length, 0x2c);
2748
2749 __ vzeroupper();
2750 }
2751
2752 // Use non-AVX code to decode 4-byte chunks into 3 bytes of output
2753
2754 // Register state (Linux):
2755 // r12-15 - saved on stack
2756 // rdi - src
2757 // rsi - sp
2758 // rdx - sl
2759 // rcx - dst
2760 // r8 - dp
2761 // r9 - isURL
2762
2763 // Register state (Windows):
2764 // r12-15 - saved on stack
2765 // rcx - src
2766 // rdx - sp
2767 // r8 - sl
2768 // r9 - dst
2769 // r12 - dp
2770 // r10 - isURL
2771
2772 // Registers (common):
2773 // length (r14) - bytes in src
2774
2775 const Register decode_table = r11;
2776 const Register out_byte_count = rbx;
2777 const Register byte1 = r13;
2778 const Register byte2 = r15;
2779 const Register byte3 = WIN64_ONLY(r8) NOT_WIN64(rdx);
2780 const Register byte4 = WIN64_ONLY(r10) NOT_WIN64(r9);
2781
2782 __ bind(L_lastChunk);
2783
2784 __ shrl(length, 2); // Multiple of 4 bytes only - length is # 4-byte chunks
2785 __ cmpl(length, 0);
2786 __ jcc(Assembler::lessEqual, L_exit_no_vzero);
2787
2788 __ shll(isURL, 8); // index into decode table based on isURL
2789 __ lea(decode_table, ExternalAddress(StubRoutines::x86::base64_decoding_table_addr()));
2790 __ addptr(decode_table, isURL);
2791
2792 __ jmp(L_bottomLoop);
2793
2794 __ align32();
2795 __ BIND(L_forceLoop);
2796 __ shll(byte1, 18);
2797 __ shll(byte2, 12);
2798 __ shll(byte3, 6);
2799 __ orl(byte1, byte2);
2800 __ orl(byte1, byte3);
2801 __ orl(byte1, byte4);
2802
2803 __ addptr(source, 4);
2804
2805 __ movb(Address(dest, dp, Address::times_1, 2), byte1);
2806 __ shrl(byte1, 8);
2807 __ movb(Address(dest, dp, Address::times_1, 1), byte1);
2808 __ shrl(byte1, 8);
2809 __ movb(Address(dest, dp, Address::times_1, 0), byte1);
2810
2811 __ addptr(dest, 3);
2812 __ decrementl(length, 1);
2813 __ jcc(Assembler::zero, L_exit_no_vzero);
2814
2815 __ BIND(L_bottomLoop);
2816 __ load_unsigned_byte(byte1, Address(source, start_offset, Address::times_1, 0x00));
2817 __ load_unsigned_byte(byte2, Address(source, start_offset, Address::times_1, 0x01));
2818 __ load_signed_byte(byte1, Address(decode_table, byte1));
2819 __ load_signed_byte(byte2, Address(decode_table, byte2));
2820 __ load_unsigned_byte(byte3, Address(source, start_offset, Address::times_1, 0x02));
2821 __ load_unsigned_byte(byte4, Address(source, start_offset, Address::times_1, 0x03));
2822 __ load_signed_byte(byte3, Address(decode_table, byte3));
2823 __ load_signed_byte(byte4, Address(decode_table, byte4));
2824
2825 __ mov(rax, byte1);
2826 __ orl(rax, byte2);
2827 __ orl(rax, byte3);
2828 __ orl(rax, byte4);
2829 __ jcc(Assembler::positive, L_forceLoop);
2830
2831 __ BIND(L_exit_no_vzero);
2832 __ pop(rax); // Get original dest value
2833 __ subptr(dest, rax); // Number of bytes converted
2834 __ movptr(rax, dest);
2835 __ pop(rbx);
2836 __ pop(r15);
2837 __ pop(r14);
2838 __ pop(r13);
2839 __ pop(r12);
2840 __ leave();
2841 __ ret(0);
2842
2843 return start;
2844 }
2845
2846
2847 /**
2848 * Arguments:
2849 *
2850 * Inputs:
2851 * c_rarg0 - int crc
2852 * c_rarg1 - byte* buf
2853 * c_rarg2 - int length
2854 *
2855 * Output:
2856 * rax - int crc result
2857 */
2858 address StubGenerator::generate_updateBytesCRC32() {
2859 assert(UseCRC32Intrinsics, "need AVX and CLMUL instructions");
2860
2861 __ align(CodeEntryAlignment);
2862 StubCodeMark mark(this, "StubRoutines", "updateBytesCRC32");
2863
2864 address start = __ pc();
2865
2866 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
2867 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
2868 // rscratch1: r10
2869 const Register crc = c_rarg0; // crc
2870 const Register buf = c_rarg1; // source java byte array address
2871 const Register len = c_rarg2; // length
2872 const Register table = c_rarg3; // crc_table address (reuse register)
2873 const Register tmp1 = r11;
2874 const Register tmp2 = r10;
2875 assert_different_registers(crc, buf, len, table, tmp1, tmp2, rax);
2876
2877 BLOCK_COMMENT("Entry:");
2878 __ enter(); // required for proper stackwalking of RuntimeStub frame
2879
2880 if (VM_Version::supports_sse4_1() && VM_Version::supports_avx512_vpclmulqdq() &&
2881 VM_Version::supports_avx512bw() &&
2882 VM_Version::supports_avx512vl()) {
2883 // The constants used in the CRC32 algorithm requires the 1's compliment of the initial crc value.
2884 // However, the constant table for CRC32-C assumes the original crc value. Account for this
2885 // difference before calling and after returning.
2886 __ lea(table, ExternalAddress(StubRoutines::x86::crc_table_avx512_addr()));
2887 __ notl(crc);
2888 __ kernel_crc32_avx512(crc, buf, len, table, tmp1, tmp2);
2889 __ notl(crc);
2890 } else {
2891 __ kernel_crc32(crc, buf, len, table, tmp1);
2892 }
2893
2894 __ movl(rax, crc);
2895 __ vzeroupper();
2896 __ leave(); // required for proper stackwalking of RuntimeStub frame
2897 __ ret(0);
2898
2899 return start;
2900 }
2901
2902 /**
2903 * Arguments:
2904 *
2905 * Inputs:
2906 * c_rarg0 - int crc
2907 * c_rarg1 - byte* buf
2908 * c_rarg2 - long length
2909 * c_rarg3 - table_start - optional (present only when doing a library_call,
2910 * not used by x86 algorithm)
2911 *
2912 * Output:
2913 * rax - int crc result
2914 */
2915 address StubGenerator::generate_updateBytesCRC32C(bool is_pclmulqdq_supported) {
2916 assert(UseCRC32CIntrinsics, "need SSE4_2");
2917 __ align(CodeEntryAlignment);
2918 StubCodeMark mark(this, "StubRoutines", "updateBytesCRC32C");
2919 address start = __ pc();
2920
2921 //reg.arg int#0 int#1 int#2 int#3 int#4 int#5 float regs
2922 //Windows RCX RDX R8 R9 none none XMM0..XMM3
2923 //Lin / Sol RDI RSI RDX RCX R8 R9 XMM0..XMM7
2924 const Register crc = c_rarg0; // crc
2925 const Register buf = c_rarg1; // source java byte array address
2926 const Register len = c_rarg2; // length
2927 const Register a = rax;
2928 const Register j = r9;
2929 const Register k = r10;
2930 const Register l = r11;
2931 #ifdef _WIN64
2932 const Register y = rdi;
2933 const Register z = rsi;
2934 #else
2935 const Register y = rcx;
2936 const Register z = r8;
2937 #endif
2938 assert_different_registers(crc, buf, len, a, j, k, l, y, z);
2939
2940 BLOCK_COMMENT("Entry:");
2941 __ enter(); // required for proper stackwalking of RuntimeStub frame
2942 Label L_continue;
2943
2944 if (VM_Version::supports_sse4_1() && VM_Version::supports_avx512_vpclmulqdq() &&
2945 VM_Version::supports_avx512bw() &&
2946 VM_Version::supports_avx512vl()) {
2947 Label L_doSmall;
2948
2949 __ cmpl(len, 384);
2950 __ jcc(Assembler::lessEqual, L_doSmall);
2951
2952 __ lea(j, ExternalAddress(StubRoutines::x86::crc32c_table_avx512_addr()));
2953 __ kernel_crc32_avx512(crc, buf, len, j, l, k);
2954
2955 __ jmp(L_continue);
2956
2957 __ bind(L_doSmall);
2958 }
2959 #ifdef _WIN64
2960 __ push(y);
2961 __ push(z);
2962 #endif
2963 __ crc32c_ipl_alg2_alt2(crc, buf, len,
2964 a, j, k,
2965 l, y, z,
2966 c_farg0, c_farg1, c_farg2,
2967 is_pclmulqdq_supported);
2968 #ifdef _WIN64
2969 __ pop(z);
2970 __ pop(y);
2971 #endif
2972
2973 __ bind(L_continue);
2974 __ movl(rax, crc);
2975 __ vzeroupper();
2976 __ leave(); // required for proper stackwalking of RuntimeStub frame
2977 __ ret(0);
2978
2979 return start;
2980 }
2981
2982
2983 /**
2984 * Arguments:
2985 *
2986 * Input:
2987 * c_rarg0 - x address
2988 * c_rarg1 - x length
2989 * c_rarg2 - y address
2990 * c_rarg3 - y length
2991 * not Win64
2992 * c_rarg4 - z address
2993 * c_rarg5 - z length
2994 * Win64
2995 * rsp+40 - z address
2996 * rsp+48 - z length
2997 */
2998 address StubGenerator::generate_multiplyToLen() {
2999 __ align(CodeEntryAlignment);
3000 StubCodeMark mark(this, "StubRoutines", "multiplyToLen");
3001 address start = __ pc();
3002
3003 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
3004 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
3005 const Register x = rdi;
3006 const Register xlen = rax;
3007 const Register y = rsi;
3008 const Register ylen = rcx;
3009 const Register z = r8;
3010 const Register zlen = r11;
3011
3012 // Next registers will be saved on stack in multiply_to_len().
3013 const Register tmp1 = r12;
3014 const Register tmp2 = r13;
3015 const Register tmp3 = r14;
3016 const Register tmp4 = r15;
3017 const Register tmp5 = rbx;
3018
3019 BLOCK_COMMENT("Entry:");
3020 __ enter(); // required for proper stackwalking of RuntimeStub frame
3021
3022 #ifndef _WIN64
3023 __ movptr(zlen, r9); // Save r9 in r11 - zlen
3024 #endif
3025 setup_arg_regs(4); // x => rdi, xlen => rsi, y => rdx
3026 // ylen => rcx, z => r8, zlen => r11
3027 // r9 and r10 may be used to save non-volatile registers
3028 #ifdef _WIN64
3029 // last 2 arguments (#4, #5) are on stack on Win64
3030 __ movptr(z, Address(rsp, 6 * wordSize));
3031 __ movptr(zlen, Address(rsp, 7 * wordSize));
3032 #endif
3033
3034 __ movptr(xlen, rsi);
3035 __ movptr(y, rdx);
3036 __ multiply_to_len(x, xlen, y, ylen, z, zlen, tmp1, tmp2, tmp3, tmp4, tmp5);
3037
3038 restore_arg_regs();
3039
3040 __ leave(); // required for proper stackwalking of RuntimeStub frame
3041 __ ret(0);
3042
3043 return start;
3044 }
3045
3046 /**
3047 * Arguments:
3048 *
3049 * Input:
3050 * c_rarg0 - obja address
3051 * c_rarg1 - objb address
3052 * c_rarg3 - length length
3053 * c_rarg4 - scale log2_array_indxscale
3054 *
3055 * Output:
3056 * rax - int >= mismatched index, < 0 bitwise complement of tail
3057 */
3058 address StubGenerator::generate_vectorizedMismatch() {
3059 __ align(CodeEntryAlignment);
3060 StubCodeMark mark(this, "StubRoutines", "vectorizedMismatch");
3061 address start = __ pc();
3062
3063 BLOCK_COMMENT("Entry:");
3064 __ enter();
3065
3066 #ifdef _WIN64 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
3067 const Register scale = c_rarg0; //rcx, will exchange with r9
3068 const Register objb = c_rarg1; //rdx
3069 const Register length = c_rarg2; //r8
3070 const Register obja = c_rarg3; //r9
3071 __ xchgq(obja, scale); //now obja and scale contains the correct contents
3072
3073 const Register tmp1 = r10;
3074 const Register tmp2 = r11;
3075 #endif
3076 #ifndef _WIN64 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
3077 const Register obja = c_rarg0; //U:rdi
3078 const Register objb = c_rarg1; //U:rsi
3079 const Register length = c_rarg2; //U:rdx
3080 const Register scale = c_rarg3; //U:rcx
3081 const Register tmp1 = r8;
3082 const Register tmp2 = r9;
3083 #endif
3084 const Register result = rax; //return value
3085 const XMMRegister vec0 = xmm0;
3086 const XMMRegister vec1 = xmm1;
3087 const XMMRegister vec2 = xmm2;
3088
3089 __ vectorized_mismatch(obja, objb, length, scale, result, tmp1, tmp2, vec0, vec1, vec2);
3090
3091 __ vzeroupper();
3092 __ leave();
3093 __ ret(0);
3094
3095 return start;
3096 }
3097
3098 /**
3099 * Arguments:
3100 *
3101 // Input:
3102 // c_rarg0 - x address
3103 // c_rarg1 - x length
3104 // c_rarg2 - z address
3105 // c_rarg3 - z length
3106 *
3107 */
3108 address StubGenerator::generate_squareToLen() {
3109
3110 __ align(CodeEntryAlignment);
3111 StubCodeMark mark(this, "StubRoutines", "squareToLen");
3112 address start = __ pc();
3113
3114 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
3115 // Unix: rdi, rsi, rdx, rcx (c_rarg0, c_rarg1, ...)
3116 const Register x = rdi;
3117 const Register len = rsi;
3118 const Register z = r8;
3119 const Register zlen = rcx;
3120
3121 const Register tmp1 = r12;
3122 const Register tmp2 = r13;
3123 const Register tmp3 = r14;
3124 const Register tmp4 = r15;
3125 const Register tmp5 = rbx;
3126
3127 BLOCK_COMMENT("Entry:");
3128 __ enter(); // required for proper stackwalking of RuntimeStub frame
3129
3130 setup_arg_regs(4); // x => rdi, len => rsi, z => rdx
3131 // zlen => rcx
3132 // r9 and r10 may be used to save non-volatile registers
3133 __ movptr(r8, rdx);
3134 __ square_to_len(x, len, z, zlen, tmp1, tmp2, tmp3, tmp4, tmp5, rdx, rax);
3135
3136 restore_arg_regs();
3137
3138 __ leave(); // required for proper stackwalking of RuntimeStub frame
3139 __ ret(0);
3140
3141 return start;
3142 }
3143
3144 address StubGenerator::generate_method_entry_barrier() {
3145 __ align(CodeEntryAlignment);
3146 StubCodeMark mark(this, "StubRoutines", "nmethod_entry_barrier");
3147 address start = __ pc();
3148
3149 Label deoptimize_label;
3150
3151 __ push(-1); // cookie, this is used for writing the new rsp when deoptimizing
3152
3153 BLOCK_COMMENT("Entry:");
3154 __ enter(); // save rbp
3155
3156 // save c_rarg0, because we want to use that value.
3157 // We could do without it but then we depend on the number of slots used by pusha
3158 __ push(c_rarg0);
3159
3160 __ lea(c_rarg0, Address(rsp, wordSize * 3)); // 1 for cookie, 1 for rbp, 1 for c_rarg0 - this should be the return address
3161
3162 __ pusha();
3163
3164 // The method may have floats as arguments, and we must spill them before calling
3165 // the VM runtime.
3166 assert(Argument::n_float_register_parameters_j == 8, "Assumption");
3167 const int xmm_size = wordSize * 2;
3168 const int xmm_spill_size = xmm_size * Argument::n_float_register_parameters_j;
3169 __ subptr(rsp, xmm_spill_size);
3170 __ movdqu(Address(rsp, xmm_size * 7), xmm7);
3171 __ movdqu(Address(rsp, xmm_size * 6), xmm6);
3172 __ movdqu(Address(rsp, xmm_size * 5), xmm5);
3173 __ movdqu(Address(rsp, xmm_size * 4), xmm4);
3174 __ movdqu(Address(rsp, xmm_size * 3), xmm3);
3175 __ movdqu(Address(rsp, xmm_size * 2), xmm2);
3176 __ movdqu(Address(rsp, xmm_size * 1), xmm1);
3177 __ movdqu(Address(rsp, xmm_size * 0), xmm0);
3178
3179 __ call_VM_leaf(CAST_FROM_FN_PTR(address, static_cast<int (*)(address*)>(BarrierSetNMethod::nmethod_stub_entry_barrier)), 1);
3180
3181 __ movdqu(xmm0, Address(rsp, xmm_size * 0));
3182 __ movdqu(xmm1, Address(rsp, xmm_size * 1));
3183 __ movdqu(xmm2, Address(rsp, xmm_size * 2));
3184 __ movdqu(xmm3, Address(rsp, xmm_size * 3));
3185 __ movdqu(xmm4, Address(rsp, xmm_size * 4));
3186 __ movdqu(xmm5, Address(rsp, xmm_size * 5));
3187 __ movdqu(xmm6, Address(rsp, xmm_size * 6));
3188 __ movdqu(xmm7, Address(rsp, xmm_size * 7));
3189 __ addptr(rsp, xmm_spill_size);
3190
3191 __ cmpl(rax, 1); // 1 means deoptimize
3192 __ jcc(Assembler::equal, deoptimize_label);
3193
3194 __ popa();
3195 __ pop(c_rarg0);
3196
3197 __ leave();
3198
3199 __ addptr(rsp, 1 * wordSize); // cookie
3200 __ ret(0);
3201
3202
3203 __ BIND(deoptimize_label);
3204
3205 __ popa();
3206 __ pop(c_rarg0);
3207
3208 __ leave();
3209
3210 // this can be taken out, but is good for verification purposes. getting a SIGSEGV
3211 // here while still having a correct stack is valuable
3212 __ testptr(rsp, Address(rsp, 0));
3213
3214 __ movptr(rsp, Address(rsp, 0)); // new rsp was written in the barrier
3215 __ jmp(Address(rsp, -1 * wordSize)); // jmp target should be callers verified_entry_point
3216
3217 return start;
3218 }
3219
3220 /**
3221 * Arguments:
3222 *
3223 * Input:
3224 * c_rarg0 - out address
3225 * c_rarg1 - in address
3226 * c_rarg2 - offset
3227 * c_rarg3 - len
3228 * not Win64
3229 * c_rarg4 - k
3230 * Win64
3231 * rsp+40 - k
3232 */
3233 address StubGenerator::generate_mulAdd() {
3234 __ align(CodeEntryAlignment);
3235 StubCodeMark mark(this, "StubRoutines", "mulAdd");
3236 address start = __ pc();
3237
3238 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
3239 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
3240 const Register out = rdi;
3241 const Register in = rsi;
3242 const Register offset = r11;
3243 const Register len = rcx;
3244 const Register k = r8;
3245
3246 // Next registers will be saved on stack in mul_add().
3247 const Register tmp1 = r12;
3248 const Register tmp2 = r13;
3249 const Register tmp3 = r14;
3250 const Register tmp4 = r15;
3251 const Register tmp5 = rbx;
3252
3253 BLOCK_COMMENT("Entry:");
3254 __ enter(); // required for proper stackwalking of RuntimeStub frame
3255
3256 setup_arg_regs(4); // out => rdi, in => rsi, offset => rdx
3257 // len => rcx, k => r8
3258 // r9 and r10 may be used to save non-volatile registers
3259 #ifdef _WIN64
3260 // last argument is on stack on Win64
3261 __ movl(k, Address(rsp, 6 * wordSize));
3262 #endif
3263 __ movptr(r11, rdx); // move offset in rdx to offset(r11)
3264 __ mul_add(out, in, offset, len, k, tmp1, tmp2, tmp3, tmp4, tmp5, rdx, rax);
3265
3266 restore_arg_regs();
3267
3268 __ leave(); // required for proper stackwalking of RuntimeStub frame
3269 __ ret(0);
3270
3271 return start;
3272 }
3273
3274 address StubGenerator::generate_bigIntegerRightShift() {
3275 __ align(CodeEntryAlignment);
3276 StubCodeMark mark(this, "StubRoutines", "bigIntegerRightShiftWorker");
3277 address start = __ pc();
3278
3279 Label Shift512Loop, ShiftTwo, ShiftTwoLoop, ShiftOne, Exit;
3280 // For Unix, the arguments are as follows: rdi, rsi, rdx, rcx, r8.
3281 const Register newArr = rdi;
3282 const Register oldArr = rsi;
3283 const Register newIdx = rdx;
3284 const Register shiftCount = rcx; // It was intentional to have shiftCount in rcx since it is used implicitly for shift.
3285 const Register totalNumIter = r8;
3286
3287 // For windows, we use r9 and r10 as temps to save rdi and rsi. Thus we cannot allocate them for our temps.
3288 // For everything else, we prefer using r9 and r10 since we do not have to save them before use.
3289 const Register tmp1 = r11; // Caller save.
3290 const Register tmp2 = rax; // Caller save.
3291 const Register tmp3 = WIN64_ONLY(r12) NOT_WIN64(r9); // Windows: Callee save. Linux: Caller save.
3292 const Register tmp4 = WIN64_ONLY(r13) NOT_WIN64(r10); // Windows: Callee save. Linux: Caller save.
3293 const Register tmp5 = r14; // Callee save.
3294 const Register tmp6 = r15;
3295
3296 const XMMRegister x0 = xmm0;
3297 const XMMRegister x1 = xmm1;
3298 const XMMRegister x2 = xmm2;
3299
3300 BLOCK_COMMENT("Entry:");
3301 __ enter(); // required for proper stackwalking of RuntimeStub frame
3302
3303 #ifdef _WIN64
3304 setup_arg_regs(4);
3305 // For windows, since last argument is on stack, we need to move it to the appropriate register.
3306 __ movl(totalNumIter, Address(rsp, 6 * wordSize));
3307 // Save callee save registers.
3308 __ push(tmp3);
3309 __ push(tmp4);
3310 #endif
3311 __ push(tmp5);
3312
3313 // Rename temps used throughout the code.
3314 const Register idx = tmp1;
3315 const Register nIdx = tmp2;
3316
3317 __ xorl(idx, idx);
3318
3319 // Start right shift from end of the array.
3320 // For example, if #iteration = 4 and newIdx = 1
3321 // then dest[4] = src[4] >> shiftCount | src[3] <<< (shiftCount - 32)
3322 // if #iteration = 4 and newIdx = 0
3323 // then dest[3] = src[4] >> shiftCount | src[3] <<< (shiftCount - 32)
3324 __ movl(idx, totalNumIter);
3325 __ movl(nIdx, idx);
3326 __ addl(nIdx, newIdx);
3327
3328 // If vectorization is enabled, check if the number of iterations is at least 64
3329 // If not, then go to ShifTwo processing 2 iterations
3330 if (VM_Version::supports_avx512_vbmi2()) {
3331 __ cmpptr(totalNumIter, (AVX3Threshold/64));
3332 __ jcc(Assembler::less, ShiftTwo);
3333
3334 if (AVX3Threshold < 16 * 64) {
3335 __ cmpl(totalNumIter, 16);
3336 __ jcc(Assembler::less, ShiftTwo);
3337 }
3338 __ evpbroadcastd(x0, shiftCount, Assembler::AVX_512bit);
3339 __ subl(idx, 16);
3340 __ subl(nIdx, 16);
3341 __ BIND(Shift512Loop);
3342 __ evmovdqul(x2, Address(oldArr, idx, Address::times_4, 4), Assembler::AVX_512bit);
3343 __ evmovdqul(x1, Address(oldArr, idx, Address::times_4), Assembler::AVX_512bit);
3344 __ vpshrdvd(x2, x1, x0, Assembler::AVX_512bit);
3345 __ evmovdqul(Address(newArr, nIdx, Address::times_4), x2, Assembler::AVX_512bit);
3346 __ subl(nIdx, 16);
3347 __ subl(idx, 16);
3348 __ jcc(Assembler::greaterEqual, Shift512Loop);
3349 __ addl(idx, 16);
3350 __ addl(nIdx, 16);
3351 }
3352 __ BIND(ShiftTwo);
3353 __ cmpl(idx, 2);
3354 __ jcc(Assembler::less, ShiftOne);
3355 __ subl(idx, 2);
3356 __ subl(nIdx, 2);
3357 __ BIND(ShiftTwoLoop);
3358 __ movl(tmp5, Address(oldArr, idx, Address::times_4, 8));
3359 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 4));
3360 __ movl(tmp3, Address(oldArr, idx, Address::times_4));
3361 __ shrdl(tmp5, tmp4);
3362 __ shrdl(tmp4, tmp3);
3363 __ movl(Address(newArr, nIdx, Address::times_4, 4), tmp5);
3364 __ movl(Address(newArr, nIdx, Address::times_4), tmp4);
3365 __ subl(nIdx, 2);
3366 __ subl(idx, 2);
3367 __ jcc(Assembler::greaterEqual, ShiftTwoLoop);
3368 __ addl(idx, 2);
3369 __ addl(nIdx, 2);
3370
3371 // Do the last iteration
3372 __ BIND(ShiftOne);
3373 __ cmpl(idx, 1);
3374 __ jcc(Assembler::less, Exit);
3375 __ subl(idx, 1);
3376 __ subl(nIdx, 1);
3377 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 4));
3378 __ movl(tmp3, Address(oldArr, idx, Address::times_4));
3379 __ shrdl(tmp4, tmp3);
3380 __ movl(Address(newArr, nIdx, Address::times_4), tmp4);
3381 __ BIND(Exit);
3382 __ vzeroupper();
3383 // Restore callee save registers.
3384 __ pop(tmp5);
3385 #ifdef _WIN64
3386 __ pop(tmp4);
3387 __ pop(tmp3);
3388 restore_arg_regs();
3389 #endif
3390 __ leave(); // required for proper stackwalking of RuntimeStub frame
3391 __ ret(0);
3392
3393 return start;
3394 }
3395
3396 /**
3397 * Arguments:
3398 *
3399 * Input:
3400 * c_rarg0 - newArr address
3401 * c_rarg1 - oldArr address
3402 * c_rarg2 - newIdx
3403 * c_rarg3 - shiftCount
3404 * not Win64
3405 * c_rarg4 - numIter
3406 * Win64
3407 * rsp40 - numIter
3408 */
3409 address StubGenerator::generate_bigIntegerLeftShift() {
3410 __ align(CodeEntryAlignment);
3411 StubCodeMark mark(this, "StubRoutines", "bigIntegerLeftShiftWorker");
3412 address start = __ pc();
3413
3414 Label Shift512Loop, ShiftTwo, ShiftTwoLoop, ShiftOne, Exit;
3415 // For Unix, the arguments are as follows: rdi, rsi, rdx, rcx, r8.
3416 const Register newArr = rdi;
3417 const Register oldArr = rsi;
3418 const Register newIdx = rdx;
3419 const Register shiftCount = rcx; // It was intentional to have shiftCount in rcx since it is used implicitly for shift.
3420 const Register totalNumIter = r8;
3421 // For windows, we use r9 and r10 as temps to save rdi and rsi. Thus we cannot allocate them for our temps.
3422 // For everything else, we prefer using r9 and r10 since we do not have to save them before use.
3423 const Register tmp1 = r11; // Caller save.
3424 const Register tmp2 = rax; // Caller save.
3425 const Register tmp3 = WIN64_ONLY(r12) NOT_WIN64(r9); // Windows: Callee save. Linux: Caller save.
3426 const Register tmp4 = WIN64_ONLY(r13) NOT_WIN64(r10); // Windows: Callee save. Linux: Caller save.
3427 const Register tmp5 = r14; // Callee save.
3428
3429 const XMMRegister x0 = xmm0;
3430 const XMMRegister x1 = xmm1;
3431 const XMMRegister x2 = xmm2;
3432 BLOCK_COMMENT("Entry:");
3433 __ enter(); // required for proper stackwalking of RuntimeStub frame
3434
3435 #ifdef _WIN64
3436 setup_arg_regs(4);
3437 // For windows, since last argument is on stack, we need to move it to the appropriate register.
3438 __ movl(totalNumIter, Address(rsp, 6 * wordSize));
3439 // Save callee save registers.
3440 __ push(tmp3);
3441 __ push(tmp4);
3442 #endif
3443 __ push(tmp5);
3444
3445 // Rename temps used throughout the code
3446 const Register idx = tmp1;
3447 const Register numIterTmp = tmp2;
3448
3449 // Start idx from zero.
3450 __ xorl(idx, idx);
3451 // Compute interior pointer for new array. We do this so that we can use same index for both old and new arrays.
3452 __ lea(newArr, Address(newArr, newIdx, Address::times_4));
3453 __ movl(numIterTmp, totalNumIter);
3454
3455 // If vectorization is enabled, check if the number of iterations is at least 64
3456 // If not, then go to ShiftTwo shifting two numbers at a time
3457 if (VM_Version::supports_avx512_vbmi2()) {
3458 __ cmpl(totalNumIter, (AVX3Threshold/64));
3459 __ jcc(Assembler::less, ShiftTwo);
3460
3461 if (AVX3Threshold < 16 * 64) {
3462 __ cmpl(totalNumIter, 16);
3463 __ jcc(Assembler::less, ShiftTwo);
3464 }
3465 __ evpbroadcastd(x0, shiftCount, Assembler::AVX_512bit);
3466 __ subl(numIterTmp, 16);
3467 __ BIND(Shift512Loop);
3468 __ evmovdqul(x1, Address(oldArr, idx, Address::times_4), Assembler::AVX_512bit);
3469 __ evmovdqul(x2, Address(oldArr, idx, Address::times_4, 0x4), Assembler::AVX_512bit);
3470 __ vpshldvd(x1, x2, x0, Assembler::AVX_512bit);
3471 __ evmovdqul(Address(newArr, idx, Address::times_4), x1, Assembler::AVX_512bit);
3472 __ addl(idx, 16);
3473 __ subl(numIterTmp, 16);
3474 __ jcc(Assembler::greaterEqual, Shift512Loop);
3475 __ addl(numIterTmp, 16);
3476 }
3477 __ BIND(ShiftTwo);
3478 __ cmpl(totalNumIter, 1);
3479 __ jcc(Assembler::less, Exit);
3480 __ movl(tmp3, Address(oldArr, idx, Address::times_4));
3481 __ subl(numIterTmp, 2);
3482 __ jcc(Assembler::less, ShiftOne);
3483
3484 __ BIND(ShiftTwoLoop);
3485 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 0x4));
3486 __ movl(tmp5, Address(oldArr, idx, Address::times_4, 0x8));
3487 __ shldl(tmp3, tmp4);
3488 __ shldl(tmp4, tmp5);
3489 __ movl(Address(newArr, idx, Address::times_4), tmp3);
3490 __ movl(Address(newArr, idx, Address::times_4, 0x4), tmp4);
3491 __ movl(tmp3, tmp5);
3492 __ addl(idx, 2);
3493 __ subl(numIterTmp, 2);
3494 __ jcc(Assembler::greaterEqual, ShiftTwoLoop);
3495
3496 // Do the last iteration
3497 __ BIND(ShiftOne);
3498 __ addl(numIterTmp, 2);
3499 __ cmpl(numIterTmp, 1);
3500 __ jcc(Assembler::less, Exit);
3501 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 0x4));
3502 __ shldl(tmp3, tmp4);
3503 __ movl(Address(newArr, idx, Address::times_4), tmp3);
3504
3505 __ BIND(Exit);
3506 __ vzeroupper();
3507 // Restore callee save registers.
3508 __ pop(tmp5);
3509 #ifdef _WIN64
3510 __ pop(tmp4);
3511 __ pop(tmp3);
3512 restore_arg_regs();
3513 #endif
3514 __ leave(); // required for proper stackwalking of RuntimeStub frame
3515 __ ret(0);
3516
3517 return start;
3518 }
3519
3520 void StubGenerator::generate_libm_stubs() {
3521 if (UseLibmIntrinsic && InlineIntrinsics) {
3522 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dsin)) {
3523 StubRoutines::_dsin = generate_libmSin(); // from stubGenerator_x86_64_sin.cpp
3524 }
3525 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dcos)) {
3526 StubRoutines::_dcos = generate_libmCos(); // from stubGenerator_x86_64_cos.cpp
3527 }
3528 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dtan)) {
3529 StubRoutines::_dtan = generate_libmTan(); // from stubGenerator_x86_64_tan.cpp
3530 }
3531 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dexp)) {
3532 StubRoutines::_dexp = generate_libmExp(); // from stubGenerator_x86_64_exp.cpp
3533 }
3534 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dpow)) {
3535 StubRoutines::_dpow = generate_libmPow(); // from stubGenerator_x86_64_pow.cpp
3536 }
3537 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dlog)) {
3538 StubRoutines::_dlog = generate_libmLog(); // from stubGenerator_x86_64_log.cpp
3539 }
3540 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dlog10)) {
3541 StubRoutines::_dlog10 = generate_libmLog10(); // from stubGenerator_x86_64_log.cpp
3542 }
3543 }
3544 }
3545
3546 /**
3547 * Arguments:
3548 *
3549 * Input:
3550 * c_rarg0 - float16 jshort
3551 *
3552 * Output:
3553 * xmm0 - float
3554 */
3555 address StubGenerator::generate_float16ToFloat() {
3556 StubCodeMark mark(this, "StubRoutines", "float16ToFloat");
3557
3558 address start = __ pc();
3559
3560 BLOCK_COMMENT("Entry:");
3561 // No need for RuntimeStub frame since it is called only during JIT compilation
3562
3563 // Load value into xmm0 and convert
3564 __ flt16_to_flt(xmm0, c_rarg0);
3565
3566 __ ret(0);
3567
3568 return start;
3569 }
3570
3571 /**
3572 * Arguments:
3573 *
3574 * Input:
3575 * xmm0 - float
3576 *
3577 * Output:
3578 * rax - float16 jshort
3579 */
3580 address StubGenerator::generate_floatToFloat16() {
3581 StubCodeMark mark(this, "StubRoutines", "floatToFloat16");
3582
3583 address start = __ pc();
3584
3585 BLOCK_COMMENT("Entry:");
3586 // No need for RuntimeStub frame since it is called only during JIT compilation
3587
3588 // Convert and put result into rax
3589 __ flt_to_flt16(rax, xmm0, xmm1);
3590
3591 __ ret(0);
3592
3593 return start;
3594 }
3595
3596 address StubGenerator::generate_cont_thaw(const char* label, Continuation::thaw_kind kind) {
3597 if (!Continuations::enabled()) return nullptr;
3598
3599 bool return_barrier = Continuation::is_thaw_return_barrier(kind);
3600 bool return_barrier_exception = Continuation::is_thaw_return_barrier_exception(kind);
3601
3602 StubCodeMark mark(this, "StubRoutines", label);
3603 address start = __ pc();
3604
3605 // TODO: Handle Valhalla return types. May require generating different return barriers.
3606
3607 if (!return_barrier) {
3608 // Pop return address. If we don't do this, we get a drift,
3609 // where the bottom-most frozen frame continuously grows.
3610 __ pop(c_rarg3);
3611 } else {
3612 __ movptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
3613 }
3614
3615 #ifdef ASSERT
3616 {
3617 Label L_good_sp;
3618 __ cmpptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
3619 __ jcc(Assembler::equal, L_good_sp);
3620 __ stop("Incorrect rsp at thaw entry");
3621 __ BIND(L_good_sp);
3622 }
3623 #endif // ASSERT
3624
3625 if (return_barrier) {
3626 // Preserve possible return value from a method returning to the return barrier.
3627 __ push(rax);
3628 __ push_d(xmm0);
3629 }
3630
3631 __ movptr(c_rarg0, r15_thread);
3632 __ movptr(c_rarg1, (return_barrier ? 1 : 0));
3633 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Continuation::prepare_thaw), 2);
3634 __ movptr(rbx, rax);
3635
3636 if (return_barrier) {
3637 // Restore return value from a method returning to the return barrier.
3638 // No safepoint in the call to thaw, so even an oop return value should be OK.
3639 __ pop_d(xmm0);
3640 __ pop(rax);
3641 }
3642
3643 #ifdef ASSERT
3644 {
3645 Label L_good_sp;
3646 __ cmpptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
3647 __ jcc(Assembler::equal, L_good_sp);
3648 __ stop("Incorrect rsp after prepare thaw");
3649 __ BIND(L_good_sp);
3650 }
3651 #endif // ASSERT
3652
3653 // rbx contains the size of the frames to thaw, 0 if overflow or no more frames
3654 Label L_thaw_success;
3655 __ testptr(rbx, rbx);
3656 __ jccb(Assembler::notZero, L_thaw_success);
3657 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
3658 __ bind(L_thaw_success);
3659
3660 // Make room for the thawed frames and align the stack.
3661 __ subptr(rsp, rbx);
3662 __ andptr(rsp, -StackAlignmentInBytes);
3663
3664 if (return_barrier) {
3665 // Preserve possible return value from a method returning to the return barrier. (Again.)
3666 __ push(rax);
3667 __ push_d(xmm0);
3668 }
3669
3670 // If we want, we can templatize thaw by kind, and have three different entries.
3671 __ movptr(c_rarg0, r15_thread);
3672 __ movptr(c_rarg1, kind);
3673 __ call_VM_leaf(Continuation::thaw_entry(), 2);
3674 __ movptr(rbx, rax);
3675
3676 if (return_barrier) {
3677 // Restore return value from a method returning to the return barrier. (Again.)
3678 // No safepoint in the call to thaw, so even an oop return value should be OK.
3679 __ pop_d(xmm0);
3680 __ pop(rax);
3681 } else {
3682 // Return 0 (success) from doYield.
3683 __ xorptr(rax, rax);
3684 }
3685
3686 // After thawing, rbx is the SP of the yielding frame.
3687 // Move there, and then to saved RBP slot.
3688 __ movptr(rsp, rbx);
3689 __ subptr(rsp, 2*wordSize);
3690
3691 if (return_barrier_exception) {
3692 __ movptr(c_rarg0, r15_thread);
3693 __ movptr(c_rarg1, Address(rsp, wordSize)); // return address
3694
3695 // rax still holds the original exception oop, save it before the call
3696 __ push(rax);
3697
3698 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), 2);
3699 __ movptr(rbx, rax);
3700
3701 // Continue at exception handler:
3702 // rax: exception oop
3703 // rbx: exception handler
3704 // rdx: exception pc
3705 __ pop(rax);
3706 __ verify_oop(rax);
3707 __ pop(rbp); // pop out RBP here too
3708 __ pop(rdx);
3709 __ jmp(rbx);
3710 } else {
3711 // We are "returning" into the topmost thawed frame; see Thaw::push_return_frame
3712 __ pop(rbp);
3713 __ ret(0);
3714 }
3715
3716 return start;
3717 }
3718
3719 address StubGenerator::generate_cont_thaw() {
3720 return generate_cont_thaw("Cont thaw", Continuation::thaw_top);
3721 }
3722
3723 // TODO: will probably need multiple return barriers depending on return type
3724
3725 address StubGenerator::generate_cont_returnBarrier() {
3726 return generate_cont_thaw("Cont thaw return barrier", Continuation::thaw_return_barrier);
3727 }
3728
3729 address StubGenerator::generate_cont_returnBarrier_exception() {
3730 return generate_cont_thaw("Cont thaw return barrier exception", Continuation::thaw_return_barrier_exception);
3731 }
3732
3733 #if INCLUDE_JFR
3734
3735 // For c2: c_rarg0 is junk, call to runtime to write a checkpoint.
3736 // It returns a jobject handle to the event writer.
3737 // The handle is dereferenced and the return value is the event writer oop.
3738 RuntimeStub* StubGenerator::generate_jfr_write_checkpoint() {
3739 enum layout {
3740 rbp_off,
3741 rbpH_off,
3742 return_off,
3743 return_off2,
3744 framesize // inclusive of return address
3745 };
3746
3747 CodeBuffer code("jfr_write_checkpoint", 1024, 64);
3748 MacroAssembler* _masm = new MacroAssembler(&code);
3749 address start = __ pc();
3750
3751 __ enter();
3752 address the_pc = __ pc();
3753
3754 int frame_complete = the_pc - start;
3755
3756 __ set_last_Java_frame(rsp, rbp, the_pc, rscratch1);
3757 __ movptr(c_rarg0, r15_thread);
3758 __ call_VM_leaf(CAST_FROM_FN_PTR(address, JfrIntrinsicSupport::write_checkpoint), 1);
3759 __ reset_last_Java_frame(true);
3760
3761 // rax is jobject handle result, unpack and process it through a barrier.
3762 __ resolve_global_jobject(rax, r15_thread, c_rarg0);
3763
3764 __ leave();
3765 __ ret(0);
3766
3767 OopMapSet* oop_maps = new OopMapSet();
3768 OopMap* map = new OopMap(framesize, 1);
3769 oop_maps->add_gc_map(frame_complete, map);
3770
3771 RuntimeStub* stub =
3772 RuntimeStub::new_runtime_stub(code.name(),
3773 &code,
3774 frame_complete,
3775 (framesize >> (LogBytesPerWord - LogBytesPerInt)),
3776 oop_maps,
3777 false);
3778 return stub;
3779 }
3780
3781 // For c2: call to return a leased buffer.
3782 RuntimeStub* StubGenerator::generate_jfr_return_lease() {
3783 enum layout {
3784 rbp_off,
3785 rbpH_off,
3786 return_off,
3787 return_off2,
3788 framesize // inclusive of return address
3789 };
3790
3791 CodeBuffer code("jfr_return_lease", 1024, 64);
3792 MacroAssembler* _masm = new MacroAssembler(&code);
3793 address start = __ pc();
3794
3795 __ enter();
3796 address the_pc = __ pc();
3797
3798 int frame_complete = the_pc - start;
3799
3800 __ set_last_Java_frame(rsp, rbp, the_pc, rscratch2);
3801 __ movptr(c_rarg0, r15_thread);
3802 __ call_VM_leaf(CAST_FROM_FN_PTR(address, JfrIntrinsicSupport::return_lease), 1);
3803 __ reset_last_Java_frame(true);
3804
3805 __ leave();
3806 __ ret(0);
3807
3808 OopMapSet* oop_maps = new OopMapSet();
3809 OopMap* map = new OopMap(framesize, 1);
3810 oop_maps->add_gc_map(frame_complete, map);
3811
3812 RuntimeStub* stub =
3813 RuntimeStub::new_runtime_stub(code.name(),
3814 &code,
3815 frame_complete,
3816 (framesize >> (LogBytesPerWord - LogBytesPerInt)),
3817 oop_maps,
3818 false);
3819 return stub;
3820 }
3821
3822 #endif // INCLUDE_JFR
3823
3824 // Continuation point for throwing of implicit exceptions that are
3825 // not handled in the current activation. Fabricates an exception
3826 // oop and initiates normal exception dispatching in this
3827 // frame. Since we need to preserve callee-saved values (currently
3828 // only for C2, but done for C1 as well) we need a callee-saved oop
3829 // map and therefore have to make these stubs into RuntimeStubs
3830 // rather than BufferBlobs. If the compiler needs all registers to
3831 // be preserved between the fault point and the exception handler
3832 // then it must assume responsibility for that in
3833 // AbstractCompiler::continuation_for_implicit_null_exception or
3834 // continuation_for_implicit_division_by_zero_exception. All other
3835 // implicit exceptions (e.g., NullPointerException or
3836 // AbstractMethodError on entry) are either at call sites or
3837 // otherwise assume that stack unwinding will be initiated, so
3838 // caller saved registers were assumed volatile in the compiler.
3839 address StubGenerator::generate_throw_exception(const char* name,
3840 address runtime_entry,
3841 Register arg1,
3842 Register arg2) {
3843 // Information about frame layout at time of blocking runtime call.
3844 // Note that we only have to preserve callee-saved registers since
3845 // the compilers are responsible for supplying a continuation point
3846 // if they expect all registers to be preserved.
3847 enum layout {
3848 rbp_off = frame::arg_reg_save_area_bytes/BytesPerInt,
3849 rbp_off2,
3850 return_off,
3851 return_off2,
3852 framesize // inclusive of return address
3853 };
3854
3855 int insts_size = 512;
3856 int locs_size = 64;
3857
3858 CodeBuffer code(name, insts_size, locs_size);
3859 OopMapSet* oop_maps = new OopMapSet();
3860 MacroAssembler* _masm = new MacroAssembler(&code);
3861
3862 address start = __ pc();
3863
3864 // This is an inlined and slightly modified version of call_VM
3865 // which has the ability to fetch the return PC out of
3866 // thread-local storage and also sets up last_Java_sp slightly
3867 // differently than the real call_VM
3868
3869 __ enter(); // required for proper stackwalking of RuntimeStub frame
3870
3871 assert(is_even(framesize/2), "sp not 16-byte aligned");
3872
3873 // return address and rbp are already in place
3874 __ subptr(rsp, (framesize-4) << LogBytesPerInt); // prolog
3875
3876 int frame_complete = __ pc() - start;
3877
3878 // Set up last_Java_sp and last_Java_fp
3879 address the_pc = __ pc();
3880 __ set_last_Java_frame(rsp, rbp, the_pc, rscratch1);
3881 __ andptr(rsp, -(StackAlignmentInBytes)); // Align stack
3882
3883 // Call runtime
3884 if (arg1 != noreg) {
3885 assert(arg2 != c_rarg1, "clobbered");
3886 __ movptr(c_rarg1, arg1);
3887 }
3888 if (arg2 != noreg) {
3889 __ movptr(c_rarg2, arg2);
3890 }
3891 __ movptr(c_rarg0, r15_thread);
3892 BLOCK_COMMENT("call runtime_entry");
3893 __ call(RuntimeAddress(runtime_entry));
3894
3895 // Generate oop map
3896 OopMap* map = new OopMap(framesize, 0);
3897
3898 oop_maps->add_gc_map(the_pc - start, map);
3899
3900 __ reset_last_Java_frame(true);
3901
3902 __ leave(); // required for proper stackwalking of RuntimeStub frame
3903
3904 // check for pending exceptions
3905 #ifdef ASSERT
3906 Label L;
3907 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
3908 __ jcc(Assembler::notEqual, L);
3909 __ should_not_reach_here();
3910 __ bind(L);
3911 #endif // ASSERT
3912 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
3913
3914
3915 // codeBlob framesize is in words (not VMRegImpl::slot_size)
3916 RuntimeStub* stub =
3917 RuntimeStub::new_runtime_stub(name,
3918 &code,
3919 frame_complete,
3920 (framesize >> (LogBytesPerWord - LogBytesPerInt)),
3921 oop_maps, false);
3922 return stub->entry_point();
3923 }
3924
3925 void StubGenerator::create_control_words() {
3926 // Round to nearest, 64-bit mode, exceptions masked
3927 StubRoutines::x86::_mxcsr_std = 0x1F80;
3928 // Round to zero, 64-bit mode, exceptions masked
3929 StubRoutines::x86::_mxcsr_rz = 0x7F80;
3930 }
3931
3932 // Initialization
3933 void StubGenerator::generate_initial_stubs() {
3934 // Generates all stubs and initializes the entry points
3935
3936 // This platform-specific settings are needed by generate_call_stub()
3937 create_control_words();
3938
3939 // Initialize table for unsafe copy memeory check.
3940 if (UnsafeCopyMemory::_table == nullptr) {
3941 UnsafeCopyMemory::create_table(16);
3942 }
3943
3944 // entry points that exist in all platforms Note: This is code
3945 // that could be shared among different platforms - however the
3946 // benefit seems to be smaller than the disadvantage of having a
3947 // much more complicated generator structure. See also comment in
3948 // stubRoutines.hpp.
3949
3950 StubRoutines::_forward_exception_entry = generate_forward_exception();
3951
3952 // Generate these first because they are called from other stubs
3953 if (InlineTypeReturnedAsFields) {
3954 StubRoutines::_load_inline_type_fields_in_regs =
3955 generate_return_value_stub(CAST_FROM_FN_PTR(address, SharedRuntime::load_inline_type_fields_in_regs),
3956 "load_inline_type_fields_in_regs", false);
3957 StubRoutines::_store_inline_type_fields_to_buf =
3958 generate_return_value_stub(CAST_FROM_FN_PTR(address, SharedRuntime::store_inline_type_fields_to_buf),
3959 "store_inline_type_fields_to_buf", true);
3960 }
3961
3962 StubRoutines::_call_stub_entry =
3963 generate_call_stub(StubRoutines::_call_stub_return_address);
3964
3965 // is referenced by megamorphic call
3966 StubRoutines::_catch_exception_entry = generate_catch_exception();
3967
3968 // atomic calls
3969 StubRoutines::_fence_entry = generate_orderaccess_fence();
3970
3971 // platform dependent
3972 StubRoutines::x86::_get_previous_sp_entry = generate_get_previous_sp();
3973
3974 StubRoutines::x86::_verify_mxcsr_entry = generate_verify_mxcsr();
3975
3976 StubRoutines::x86::_f2i_fixup = generate_f2i_fixup();
3977 StubRoutines::x86::_f2l_fixup = generate_f2l_fixup();
3978 StubRoutines::x86::_d2i_fixup = generate_d2i_fixup();
3979 StubRoutines::x86::_d2l_fixup = generate_d2l_fixup();
3980
3981 StubRoutines::x86::_float_sign_mask = generate_fp_mask("float_sign_mask", 0x7FFFFFFF7FFFFFFF);
3982 StubRoutines::x86::_float_sign_flip = generate_fp_mask("float_sign_flip", 0x8000000080000000);
3983 StubRoutines::x86::_double_sign_mask = generate_fp_mask("double_sign_mask", 0x7FFFFFFFFFFFFFFF);
3984 StubRoutines::x86::_double_sign_flip = generate_fp_mask("double_sign_flip", 0x8000000000000000);
3985
3986 // Build this early so it's available for the interpreter.
3987 StubRoutines::_throw_StackOverflowError_entry =
3988 generate_throw_exception("StackOverflowError throw_exception",
3989 CAST_FROM_FN_PTR(address,
3990 SharedRuntime::
3991 throw_StackOverflowError));
3992 StubRoutines::_throw_delayed_StackOverflowError_entry =
3993 generate_throw_exception("delayed StackOverflowError throw_exception",
3994 CAST_FROM_FN_PTR(address,
3995 SharedRuntime::
3996 throw_delayed_StackOverflowError));
3997 if (UseCRC32Intrinsics) {
3998 // set table address before stub generation which use it
3999 StubRoutines::_crc_table_adr = (address)StubRoutines::x86::_crc_table;
4000 StubRoutines::_updateBytesCRC32 = generate_updateBytesCRC32();
4001 }
4002
4003 if (UseCRC32CIntrinsics) {
4004 bool supports_clmul = VM_Version::supports_clmul();
4005 StubRoutines::x86::generate_CRC32C_table(supports_clmul);
4006 StubRoutines::_crc32c_table_addr = (address)StubRoutines::x86::_crc32c_table;
4007 StubRoutines::_updateBytesCRC32C = generate_updateBytesCRC32C(supports_clmul);
4008 }
4009
4010 if (VM_Version::supports_float16()) {
4011 // For results consistency both intrinsics should be enabled.
4012 // vmIntrinsics checks InlineIntrinsics flag, no need to check it here.
4013 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_float16ToFloat) &&
4014 vmIntrinsics::is_intrinsic_available(vmIntrinsics::_floatToFloat16)) {
4015 StubRoutines::_hf2f = generate_float16ToFloat();
4016 StubRoutines::_f2hf = generate_floatToFloat16();
4017 }
4018 }
4019
4020 generate_libm_stubs();
4021
4022 StubRoutines::_fmod = generate_libmFmod(); // from stubGenerator_x86_64_fmod.cpp
4023 }
4024
4025 // Call here from the interpreter or compiled code to either load
4026 // multiple returned values from the inline type instance being
4027 // returned to registers or to store returned values to a newly
4028 // allocated inline type instance.
4029 // Register is a class, but it would be assigned numerical value.
4030 // "0" is assigned for xmm0. Thus we need to ignore -Wnonnull.
4031 PRAGMA_DIAG_PUSH
4032 PRAGMA_NONNULL_IGNORED
4033 address StubGenerator::generate_return_value_stub(address destination, const char* name, bool has_res) {
4034 // We need to save all registers the calling convention may use so
4035 // the runtime calls read or update those registers. This needs to
4036 // be in sync with SharedRuntime::java_return_convention().
4037 enum layout {
4038 pad_off = frame::arg_reg_save_area_bytes/BytesPerInt, pad_off_2,
4039 rax_off, rax_off_2,
4040 j_rarg5_off, j_rarg5_2,
4041 j_rarg4_off, j_rarg4_2,
4042 j_rarg3_off, j_rarg3_2,
4043 j_rarg2_off, j_rarg2_2,
4044 j_rarg1_off, j_rarg1_2,
4045 j_rarg0_off, j_rarg0_2,
4046 j_farg0_off, j_farg0_2,
4047 j_farg1_off, j_farg1_2,
4048 j_farg2_off, j_farg2_2,
4049 j_farg3_off, j_farg3_2,
4050 j_farg4_off, j_farg4_2,
4051 j_farg5_off, j_farg5_2,
4052 j_farg6_off, j_farg6_2,
4053 j_farg7_off, j_farg7_2,
4054 rbp_off, rbp_off_2,
4055 return_off, return_off_2,
4056
4057 framesize
4058 };
4059
4060 CodeBuffer buffer(name, 1000, 512);
4061 MacroAssembler* _masm = new MacroAssembler(&buffer);
4062
4063 int frame_size_in_bytes = align_up(framesize*BytesPerInt, 16);
4064 assert(frame_size_in_bytes == framesize*BytesPerInt, "misaligned");
4065 int frame_size_in_slots = frame_size_in_bytes / BytesPerInt;
4066 int frame_size_in_words = frame_size_in_bytes / wordSize;
4067
4068 OopMapSet *oop_maps = new OopMapSet();
4069 OopMap* map = new OopMap(frame_size_in_slots, 0);
4070
4071 map->set_callee_saved(VMRegImpl::stack2reg(rax_off), rax->as_VMReg());
4072 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg5_off), j_rarg5->as_VMReg());
4073 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg4_off), j_rarg4->as_VMReg());
4074 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg3_off), j_rarg3->as_VMReg());
4075 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg2_off), j_rarg2->as_VMReg());
4076 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg1_off), j_rarg1->as_VMReg());
4077 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg0_off), j_rarg0->as_VMReg());
4078 map->set_callee_saved(VMRegImpl::stack2reg(j_farg0_off), j_farg0->as_VMReg());
4079 map->set_callee_saved(VMRegImpl::stack2reg(j_farg1_off), j_farg1->as_VMReg());
4080 map->set_callee_saved(VMRegImpl::stack2reg(j_farg2_off), j_farg2->as_VMReg());
4081 map->set_callee_saved(VMRegImpl::stack2reg(j_farg3_off), j_farg3->as_VMReg());
4082 map->set_callee_saved(VMRegImpl::stack2reg(j_farg4_off), j_farg4->as_VMReg());
4083 map->set_callee_saved(VMRegImpl::stack2reg(j_farg5_off), j_farg5->as_VMReg());
4084 map->set_callee_saved(VMRegImpl::stack2reg(j_farg6_off), j_farg6->as_VMReg());
4085 map->set_callee_saved(VMRegImpl::stack2reg(j_farg7_off), j_farg7->as_VMReg());
4086
4087 int start = __ offset();
4088
4089 __ subptr(rsp, frame_size_in_bytes - 8 /* return address*/);
4090
4091 __ movptr(Address(rsp, rbp_off * BytesPerInt), rbp);
4092 __ movdbl(Address(rsp, j_farg7_off * BytesPerInt), j_farg7);
4093 __ movdbl(Address(rsp, j_farg6_off * BytesPerInt), j_farg6);
4094 __ movdbl(Address(rsp, j_farg5_off * BytesPerInt), j_farg5);
4095 __ movdbl(Address(rsp, j_farg4_off * BytesPerInt), j_farg4);
4096 __ movdbl(Address(rsp, j_farg3_off * BytesPerInt), j_farg3);
4097 __ movdbl(Address(rsp, j_farg2_off * BytesPerInt), j_farg2);
4098 __ movdbl(Address(rsp, j_farg1_off * BytesPerInt), j_farg1);
4099 __ movdbl(Address(rsp, j_farg0_off * BytesPerInt), j_farg0);
4100
4101 __ movptr(Address(rsp, j_rarg0_off * BytesPerInt), j_rarg0);
4102 __ movptr(Address(rsp, j_rarg1_off * BytesPerInt), j_rarg1);
4103 __ movptr(Address(rsp, j_rarg2_off * BytesPerInt), j_rarg2);
4104 __ movptr(Address(rsp, j_rarg3_off * BytesPerInt), j_rarg3);
4105 __ movptr(Address(rsp, j_rarg4_off * BytesPerInt), j_rarg4);
4106 __ movptr(Address(rsp, j_rarg5_off * BytesPerInt), j_rarg5);
4107 __ movptr(Address(rsp, rax_off * BytesPerInt), rax);
4108
4109 int frame_complete = __ offset();
4110
4111 __ set_last_Java_frame(noreg, noreg, nullptr, rscratch1);
4112
4113 __ mov(c_rarg0, r15_thread);
4114 __ mov(c_rarg1, rax);
4115
4116 __ call(RuntimeAddress(destination));
4117
4118 // Set an oopmap for the call site.
4119
4120 oop_maps->add_gc_map( __ offset() - start, map);
4121
4122 // clear last_Java_sp
4123 __ reset_last_Java_frame(false);
4124
4125 __ movptr(rbp, Address(rsp, rbp_off * BytesPerInt));
4126 __ movdbl(j_farg7, Address(rsp, j_farg7_off * BytesPerInt));
4127 __ movdbl(j_farg6, Address(rsp, j_farg6_off * BytesPerInt));
4128 __ movdbl(j_farg5, Address(rsp, j_farg5_off * BytesPerInt));
4129 __ movdbl(j_farg4, Address(rsp, j_farg4_off * BytesPerInt));
4130 __ movdbl(j_farg3, Address(rsp, j_farg3_off * BytesPerInt));
4131 __ movdbl(j_farg2, Address(rsp, j_farg2_off * BytesPerInt));
4132 __ movdbl(j_farg1, Address(rsp, j_farg1_off * BytesPerInt));
4133 __ movdbl(j_farg0, Address(rsp, j_farg0_off * BytesPerInt));
4134
4135 __ movptr(j_rarg0, Address(rsp, j_rarg0_off * BytesPerInt));
4136 __ movptr(j_rarg1, Address(rsp, j_rarg1_off * BytesPerInt));
4137 __ movptr(j_rarg2, Address(rsp, j_rarg2_off * BytesPerInt));
4138 __ movptr(j_rarg3, Address(rsp, j_rarg3_off * BytesPerInt));
4139 __ movptr(j_rarg4, Address(rsp, j_rarg4_off * BytesPerInt));
4140 __ movptr(j_rarg5, Address(rsp, j_rarg5_off * BytesPerInt));
4141 __ movptr(rax, Address(rsp, rax_off * BytesPerInt));
4142
4143 __ addptr(rsp, frame_size_in_bytes-8);
4144
4145 // check for pending exceptions
4146 Label pending;
4147 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
4148 __ jcc(Assembler::notEqual, pending);
4149
4150 if (has_res) {
4151 __ get_vm_result(rax, r15_thread);
4152 }
4153
4154 __ ret(0);
4155
4156 __ bind(pending);
4157
4158 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset()));
4159 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
4160
4161 // -------------
4162 // make sure all code is generated
4163 _masm->flush();
4164
4165 RuntimeStub* stub = RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_in_words, oop_maps, false);
4166 return stub->entry_point();
4167 }
4168
4169 void StubGenerator::generate_continuation_stubs() {
4170 // Continuation stubs:
4171 StubRoutines::_cont_thaw = generate_cont_thaw();
4172 StubRoutines::_cont_returnBarrier = generate_cont_returnBarrier();
4173 StubRoutines::_cont_returnBarrierExc = generate_cont_returnBarrier_exception();
4174
4175 JFR_ONLY(generate_jfr_stubs();)
4176 }
4177
4178 #if INCLUDE_JFR
4179 void StubGenerator::generate_jfr_stubs() {
4180 StubRoutines::_jfr_write_checkpoint_stub = generate_jfr_write_checkpoint();
4181 StubRoutines::_jfr_write_checkpoint = StubRoutines::_jfr_write_checkpoint_stub->entry_point();
4182 StubRoutines::_jfr_return_lease_stub = generate_jfr_return_lease();
4183 StubRoutines::_jfr_return_lease = StubRoutines::_jfr_return_lease_stub->entry_point();
4184 }
4185 #endif
4186
4187 void StubGenerator::generate_final_stubs() {
4188 // Generates the rest of stubs and initializes the entry points
4189
4190 // These entry points require SharedInfo::stack0 to be set up in
4191 // non-core builds and need to be relocatable, so they each
4192 // fabricate a RuntimeStub internally.
4193 StubRoutines::_throw_AbstractMethodError_entry =
4194 generate_throw_exception("AbstractMethodError throw_exception",
4195 CAST_FROM_FN_PTR(address,
4196 SharedRuntime::
4197 throw_AbstractMethodError));
4198
4199 StubRoutines::_throw_IncompatibleClassChangeError_entry =
4200 generate_throw_exception("IncompatibleClassChangeError throw_exception",
4201 CAST_FROM_FN_PTR(address,
4202 SharedRuntime::
4203 throw_IncompatibleClassChangeError));
4204
4205 StubRoutines::_throw_NullPointerException_at_call_entry =
4206 generate_throw_exception("NullPointerException at call throw_exception",
4207 CAST_FROM_FN_PTR(address,
4208 SharedRuntime::
4209 throw_NullPointerException_at_call));
4210
4211 // support for verify_oop (must happen after universe_init)
4212 if (VerifyOops) {
4213 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop();
4214 }
4215
4216 // data cache line writeback
4217 StubRoutines::_data_cache_writeback = generate_data_cache_writeback();
4218 StubRoutines::_data_cache_writeback_sync = generate_data_cache_writeback_sync();
4219
4220 // arraycopy stubs used by compilers
4221 generate_arraycopy_stubs();
4222
4223 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
4224 if (bs_nm != nullptr) {
4225 StubRoutines::x86::_method_entry_barrier = generate_method_entry_barrier();
4226 }
4227
4228 if (UseVectorizedMismatchIntrinsic) {
4229 StubRoutines::_vectorizedMismatch = generate_vectorizedMismatch();
4230 }
4231 }
4232
4233 void StubGenerator::generate_compiler_stubs() {
4234 #if COMPILER2_OR_JVMCI
4235
4236 // Entry points that are C2 compiler specific.
4237
4238 StubRoutines::x86::_vector_float_sign_mask = generate_vector_mask("vector_float_sign_mask", 0x7FFFFFFF7FFFFFFF);
4239 StubRoutines::x86::_vector_float_sign_flip = generate_vector_mask("vector_float_sign_flip", 0x8000000080000000);
4240 StubRoutines::x86::_vector_double_sign_mask = generate_vector_mask("vector_double_sign_mask", 0x7FFFFFFFFFFFFFFF);
4241 StubRoutines::x86::_vector_double_sign_flip = generate_vector_mask("vector_double_sign_flip", 0x8000000000000000);
4242 StubRoutines::x86::_vector_all_bits_set = generate_vector_mask("vector_all_bits_set", 0xFFFFFFFFFFFFFFFF);
4243 StubRoutines::x86::_vector_int_mask_cmp_bits = generate_vector_mask("vector_int_mask_cmp_bits", 0x0000000100000001);
4244 StubRoutines::x86::_vector_short_to_byte_mask = generate_vector_mask("vector_short_to_byte_mask", 0x00ff00ff00ff00ff);
4245 StubRoutines::x86::_vector_byte_perm_mask = generate_vector_byte_perm_mask("vector_byte_perm_mask");
4246 StubRoutines::x86::_vector_int_to_byte_mask = generate_vector_mask("vector_int_to_byte_mask", 0x000000ff000000ff);
4247 StubRoutines::x86::_vector_int_to_short_mask = generate_vector_mask("vector_int_to_short_mask", 0x0000ffff0000ffff);
4248 StubRoutines::x86::_vector_32_bit_mask = generate_vector_custom_i32("vector_32_bit_mask", Assembler::AVX_512bit,
4249 0xFFFFFFFF, 0, 0, 0);
4250 StubRoutines::x86::_vector_64_bit_mask = generate_vector_custom_i32("vector_64_bit_mask", Assembler::AVX_512bit,
4251 0xFFFFFFFF, 0xFFFFFFFF, 0, 0);
4252 StubRoutines::x86::_vector_int_shuffle_mask = generate_vector_mask("vector_int_shuffle_mask", 0x0302010003020100);
4253 StubRoutines::x86::_vector_byte_shuffle_mask = generate_vector_byte_shuffle_mask("vector_byte_shuffle_mask");
4254 StubRoutines::x86::_vector_short_shuffle_mask = generate_vector_mask("vector_short_shuffle_mask", 0x0100010001000100);
4255 StubRoutines::x86::_vector_long_shuffle_mask = generate_vector_mask("vector_long_shuffle_mask", 0x0000000100000000);
4256 StubRoutines::x86::_vector_long_sign_mask = generate_vector_mask("vector_long_sign_mask", 0x8000000000000000);
4257 StubRoutines::x86::_vector_iota_indices = generate_iota_indices("iota_indices");
4258 StubRoutines::x86::_vector_count_leading_zeros_lut = generate_count_leading_zeros_lut("count_leading_zeros_lut");
4259 StubRoutines::x86::_vector_reverse_bit_lut = generate_vector_reverse_bit_lut("reverse_bit_lut");
4260 StubRoutines::x86::_vector_reverse_byte_perm_mask_long = generate_vector_reverse_byte_perm_mask_long("perm_mask_long");
4261 StubRoutines::x86::_vector_reverse_byte_perm_mask_int = generate_vector_reverse_byte_perm_mask_int("perm_mask_int");
4262 StubRoutines::x86::_vector_reverse_byte_perm_mask_short = generate_vector_reverse_byte_perm_mask_short("perm_mask_short");
4263
4264 if (VM_Version::supports_avx2() && !VM_Version::supports_avx512_vpopcntdq()) {
4265 // lut implementation influenced by counting 1s algorithm from section 5-1 of Hackers' Delight.
4266 StubRoutines::x86::_vector_popcount_lut = generate_popcount_avx_lut("popcount_lut");
4267 }
4268
4269 generate_aes_stubs();
4270
4271 generate_ghash_stubs();
4272
4273 generate_chacha_stubs();
4274
4275 if (UseAdler32Intrinsics) {
4276 StubRoutines::_updateBytesAdler32 = generate_updateBytesAdler32();
4277 }
4278
4279 if (UsePoly1305Intrinsics) {
4280 StubRoutines::_poly1305_processBlocks = generate_poly1305_processBlocks();
4281 }
4282
4283 if (UseMD5Intrinsics) {
4284 StubRoutines::_md5_implCompress = generate_md5_implCompress(false, "md5_implCompress");
4285 StubRoutines::_md5_implCompressMB = generate_md5_implCompress(true, "md5_implCompressMB");
4286 }
4287
4288 if (UseSHA1Intrinsics) {
4289 StubRoutines::x86::_upper_word_mask_addr = generate_upper_word_mask();
4290 StubRoutines::x86::_shuffle_byte_flip_mask_addr = generate_shuffle_byte_flip_mask();
4291 StubRoutines::_sha1_implCompress = generate_sha1_implCompress(false, "sha1_implCompress");
4292 StubRoutines::_sha1_implCompressMB = generate_sha1_implCompress(true, "sha1_implCompressMB");
4293 }
4294
4295 if (UseSHA256Intrinsics) {
4296 StubRoutines::x86::_k256_adr = (address)StubRoutines::x86::_k256;
4297 char* dst = (char*)StubRoutines::x86::_k256_W;
4298 char* src = (char*)StubRoutines::x86::_k256;
4299 for (int ii = 0; ii < 16; ++ii) {
4300 memcpy(dst + 32 * ii, src + 16 * ii, 16);
4301 memcpy(dst + 32 * ii + 16, src + 16 * ii, 16);
4302 }
4303 StubRoutines::x86::_k256_W_adr = (address)StubRoutines::x86::_k256_W;
4304 StubRoutines::x86::_pshuffle_byte_flip_mask_addr = generate_pshuffle_byte_flip_mask();
4305 StubRoutines::_sha256_implCompress = generate_sha256_implCompress(false, "sha256_implCompress");
4306 StubRoutines::_sha256_implCompressMB = generate_sha256_implCompress(true, "sha256_implCompressMB");
4307 }
4308
4309 if (UseSHA512Intrinsics) {
4310 StubRoutines::x86::_k512_W_addr = (address)StubRoutines::x86::_k512_W;
4311 StubRoutines::x86::_pshuffle_byte_flip_mask_addr_sha512 = generate_pshuffle_byte_flip_mask_sha512();
4312 StubRoutines::_sha512_implCompress = generate_sha512_implCompress(false, "sha512_implCompress");
4313 StubRoutines::_sha512_implCompressMB = generate_sha512_implCompress(true, "sha512_implCompressMB");
4314 }
4315
4316 if (UseBASE64Intrinsics) {
4317 if(VM_Version::supports_avx2()) {
4318 StubRoutines::x86::_avx2_shuffle_base64 = base64_avx2_shuffle_addr();
4319 StubRoutines::x86::_avx2_input_mask_base64 = base64_avx2_input_mask_addr();
4320 StubRoutines::x86::_avx2_lut_base64 = base64_avx2_lut_addr();
4321 StubRoutines::x86::_avx2_decode_tables_base64 = base64_AVX2_decode_tables_addr();
4322 StubRoutines::x86::_avx2_decode_lut_tables_base64 = base64_AVX2_decode_LUT_tables_addr();
4323 }
4324 StubRoutines::x86::_encoding_table_base64 = base64_encoding_table_addr();
4325 if (VM_Version::supports_avx512_vbmi()) {
4326 StubRoutines::x86::_shuffle_base64 = base64_shuffle_addr();
4327 StubRoutines::x86::_lookup_lo_base64 = base64_vbmi_lookup_lo_addr();
4328 StubRoutines::x86::_lookup_hi_base64 = base64_vbmi_lookup_hi_addr();
4329 StubRoutines::x86::_lookup_lo_base64url = base64_vbmi_lookup_lo_url_addr();
4330 StubRoutines::x86::_lookup_hi_base64url = base64_vbmi_lookup_hi_url_addr();
4331 StubRoutines::x86::_pack_vec_base64 = base64_vbmi_pack_vec_addr();
4332 StubRoutines::x86::_join_0_1_base64 = base64_vbmi_join_0_1_addr();
4333 StubRoutines::x86::_join_1_2_base64 = base64_vbmi_join_1_2_addr();
4334 StubRoutines::x86::_join_2_3_base64 = base64_vbmi_join_2_3_addr();
4335 }
4336 StubRoutines::x86::_decoding_table_base64 = base64_decoding_table_addr();
4337 StubRoutines::_base64_encodeBlock = generate_base64_encodeBlock();
4338 StubRoutines::_base64_decodeBlock = generate_base64_decodeBlock();
4339 }
4340
4341 #ifdef COMPILER2
4342 if (UseMultiplyToLenIntrinsic) {
4343 StubRoutines::_multiplyToLen = generate_multiplyToLen();
4344 }
4345 if (UseSquareToLenIntrinsic) {
4346 StubRoutines::_squareToLen = generate_squareToLen();
4347 }
4348 if (UseMulAddIntrinsic) {
4349 StubRoutines::_mulAdd = generate_mulAdd();
4350 }
4351 if (VM_Version::supports_avx512_vbmi2()) {
4352 StubRoutines::_bigIntegerRightShiftWorker = generate_bigIntegerRightShift();
4353 StubRoutines::_bigIntegerLeftShiftWorker = generate_bigIntegerLeftShift();
4354 }
4355 if (UseMontgomeryMultiplyIntrinsic) {
4356 StubRoutines::_montgomeryMultiply
4357 = CAST_FROM_FN_PTR(address, SharedRuntime::montgomery_multiply);
4358 }
4359 if (UseMontgomerySquareIntrinsic) {
4360 StubRoutines::_montgomerySquare
4361 = CAST_FROM_FN_PTR(address, SharedRuntime::montgomery_square);
4362 }
4363
4364 // Get svml stub routine addresses
4365 void *libjsvml = nullptr;
4366 char ebuf[1024];
4367 char dll_name[JVM_MAXPATHLEN];
4368 if (os::dll_locate_lib(dll_name, sizeof(dll_name), Arguments::get_dll_dir(), "jsvml")) {
4369 libjsvml = os::dll_load(dll_name, ebuf, sizeof ebuf);
4370 }
4371 if (libjsvml != nullptr) {
4372 // SVML method naming convention
4373 // All the methods are named as __jsvml_op<T><N>_ha_<VV>
4374 // Where:
4375 // ha stands for high accuracy
4376 // <T> is optional to indicate float/double
4377 // Set to f for vector float operation
4378 // Omitted for vector double operation
4379 // <N> is the number of elements in the vector
4380 // 1, 2, 4, 8, 16
4381 // e.g. 128 bit float vector has 4 float elements
4382 // <VV> indicates the avx/sse level:
4383 // z0 is AVX512, l9 is AVX2, e9 is AVX1 and ex is for SSE2
4384 // e.g. __jsvml_expf16_ha_z0 is the method for computing 16 element vector float exp using AVX 512 insns
4385 // __jsvml_exp8_ha_z0 is the method for computing 8 element vector double exp using AVX 512 insns
4386
4387 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, JNI_LIB_PREFIX "jsvml" JNI_LIB_SUFFIX, p2i(libjsvml));
4388 if (UseAVX > 2) {
4389 for (int op = 0; op < VectorSupport::NUM_SVML_OP; op++) {
4390 int vop = VectorSupport::VECTOR_OP_SVML_START + op;
4391 if ((!VM_Version::supports_avx512dq()) &&
4392 (vop == VectorSupport::VECTOR_OP_LOG || vop == VectorSupport::VECTOR_OP_LOG10 || vop == VectorSupport::VECTOR_OP_POW)) {
4393 continue;
4394 }
4395 snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf16_ha_z0", VectorSupport::svmlname[op]);
4396 StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_512][op] = (address)os::dll_lookup(libjsvml, ebuf);
4397
4398 snprintf(ebuf, sizeof(ebuf), "__jsvml_%s8_ha_z0", VectorSupport::svmlname[op]);
4399 StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_512][op] = (address)os::dll_lookup(libjsvml, ebuf);
4400 }
4401 }
4402 const char* avx_sse_str = (UseAVX >= 2) ? "l9" : ((UseAVX == 1) ? "e9" : "ex");
4403 for (int op = 0; op < VectorSupport::NUM_SVML_OP; op++) {
4404 int vop = VectorSupport::VECTOR_OP_SVML_START + op;
4405 if (vop == VectorSupport::VECTOR_OP_POW) {
4406 continue;
4407 }
4408 snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf4_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4409 StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_64][op] = (address)os::dll_lookup(libjsvml, ebuf);
4410
4411 snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf4_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4412 StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_128][op] = (address)os::dll_lookup(libjsvml, ebuf);
4413
4414 snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf8_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4415 StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_256][op] = (address)os::dll_lookup(libjsvml, ebuf);
4416
4417 snprintf(ebuf, sizeof(ebuf), "__jsvml_%s1_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4418 StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_64][op] = (address)os::dll_lookup(libjsvml, ebuf);
4419
4420 snprintf(ebuf, sizeof(ebuf), "__jsvml_%s2_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4421 StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_128][op] = (address)os::dll_lookup(libjsvml, ebuf);
4422
4423 snprintf(ebuf, sizeof(ebuf), "__jsvml_%s4_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4424 StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_256][op] = (address)os::dll_lookup(libjsvml, ebuf);
4425 }
4426 }
4427 #endif // COMPILER2
4428 #endif // COMPILER2_OR_JVMCI
4429 }
4430
4431 StubGenerator::StubGenerator(CodeBuffer* code, StubsKind kind) : StubCodeGenerator(code) {
4432 DEBUG_ONLY( _regs_in_thread = false; )
4433 switch(kind) {
4434 case Initial_stubs:
4435 generate_initial_stubs();
4436 break;
4437 case Continuation_stubs:
4438 generate_continuation_stubs();
4439 break;
4440 case Compiler_stubs:
4441 generate_compiler_stubs();
4442 break;
4443 case Final_stubs:
4444 generate_final_stubs();
4445 break;
4446 default:
4447 fatal("unexpected stubs kind: %d", kind);
4448 break;
4449 };
4450 }
4451
4452 void StubGenerator_generate(CodeBuffer* code, StubCodeGenerator::StubsKind kind) {
4453 StubGenerator g(code, kind);
4454 }
4455
4456 #undef __