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
335 // handle T_INT case
336 __ movl(Address(r13, 0), rax);
337
338 __ BIND(exit);
339
340 // pop parameters
341 __ lea(rsp, rsp_after_call);
342
343 #ifdef ASSERT
344 // verify that threads correspond
345 {
346 Label L1, L2, L3;
347 __ cmpptr(r15_thread, thread);
348 __ jcc(Assembler::equal, L1);
349 __ stop("StubRoutines::call_stub: r15_thread is corrupted");
350 __ bind(L1);
351 __ get_thread(rbx);
352 __ cmpptr(r15_thread, thread);
353 __ jcc(Assembler::equal, L2);
354 __ stop("StubRoutines::call_stub: r15_thread is modified by call");
355 __ bind(L2);
356 __ cmpptr(r15_thread, rbx);
357 __ jcc(Assembler::equal, L3);
358 __ stop("StubRoutines::call_stub: threads must correspond");
359 __ bind(L3);
360 }
361 #endif
362
363 __ pop_cont_fastpath();
364
365 // restore regs belonging to calling function
366 #ifdef _WIN64
367 // emit the restores for xmm regs
368 if (VM_Version::supports_evex()) {
369 for (int i = xmm_save_first; i <= last_reg; i++) {
370 __ vinsertf32x4(as_XMMRegister(i), as_XMMRegister(i), xmm_save(i), 0);
371 }
372 } else {
373 for (int i = xmm_save_first; i <= last_reg; i++) {
374 __ movdqu(as_XMMRegister(i), xmm_save(i));
375 }
376 }
377 #endif
378 __ movptr(r15, r15_save);
379 __ movptr(r14, r14_save);
380 __ movptr(r13, r13_save);
381 __ movptr(r12, r12_save);
382 __ movptr(rbx, rbx_save);
383
384 #ifdef _WIN64
385 __ movptr(rdi, rdi_save);
386 __ movptr(rsi, rsi_save);
387 #else
388 __ ldmxcsr(mxcsr_save);
389 #endif
390
391 // restore rsp
392 __ addptr(rsp, -rsp_after_call_off * wordSize);
393
394 // return
395 __ vzeroupper();
396 __ pop(rbp);
397 __ ret(0);
398
399 // handle return types different from T_INT
400 __ BIND(check_prim);
401 if (InlineTypeReturnedAsFields) {
402 // Check for scalarized return value
403 __ testptr(rax, 1);
404 __ jcc(Assembler::zero, is_long);
405 // Load pack handler address
406 __ andptr(rax, -2);
407 __ movptr(rax, Address(rax, InstanceKlass::adr_inlineklass_fixed_block_offset()));
408 __ movptr(rbx, Address(rax, InlineKlass::pack_handler_jobject_offset()));
409 // Call pack handler to initialize the buffer
410 __ call(rbx);
411 __ jmp(exit);
412 }
413 __ BIND(is_long);
414 __ movq(Address(r13, 0), rax);
415 __ jmp(exit);
416
417 __ BIND(is_float);
418 __ movflt(Address(r13, 0), xmm0);
419 __ jmp(exit);
420
421 __ BIND(is_double);
422 __ movdbl(Address(r13, 0), xmm0);
423 __ jmp(exit);
424
425 return start;
426 }
427
428 // Return point for a Java call if there's an exception thrown in
429 // Java code. The exception is caught and transformed into a
430 // pending exception stored in JavaThread that can be tested from
431 // within the VM.
432 //
433 // Note: Usually the parameters are removed by the callee. In case
434 // of an exception crossing an activation frame boundary, that is
435 // not the case if the callee is compiled code => need to setup the
436 // rsp.
437 //
438 // rax: exception oop
439
440 address StubGenerator::generate_catch_exception() {
441 StubCodeMark mark(this, "StubRoutines", "catch_exception");
442 address start = __ pc();
443
444 // same as in generate_call_stub():
445 const Address rsp_after_call(rbp, rsp_after_call_off * wordSize);
446 const Address thread (rbp, thread_off * wordSize);
447
448 #ifdef ASSERT
449 // verify that threads correspond
450 {
451 Label L1, L2, L3;
452 __ cmpptr(r15_thread, thread);
453 __ jcc(Assembler::equal, L1);
454 __ stop("StubRoutines::catch_exception: r15_thread is corrupted");
455 __ bind(L1);
456 __ get_thread(rbx);
457 __ cmpptr(r15_thread, thread);
458 __ jcc(Assembler::equal, L2);
459 __ stop("StubRoutines::catch_exception: r15_thread is modified by call");
460 __ bind(L2);
461 __ cmpptr(r15_thread, rbx);
462 __ jcc(Assembler::equal, L3);
463 __ stop("StubRoutines::catch_exception: threads must correspond");
464 __ bind(L3);
465 }
466 #endif
467
468 // set pending exception
469 __ verify_oop(rax);
470
471 __ movptr(Address(r15_thread, Thread::pending_exception_offset()), rax);
472 __ lea(rscratch1, ExternalAddress((address)__FILE__));
473 __ movptr(Address(r15_thread, Thread::exception_file_offset()), rscratch1);
474 __ movl(Address(r15_thread, Thread::exception_line_offset()), (int) __LINE__);
475
476 // complete return to VM
477 assert(StubRoutines::_call_stub_return_address != nullptr,
478 "_call_stub_return_address must have been generated before");
479 __ jump(RuntimeAddress(StubRoutines::_call_stub_return_address));
480
481 return start;
482 }
483
484 // Continuation point for runtime calls returning with a pending
485 // exception. The pending exception check happened in the runtime
486 // or native call stub. The pending exception in Thread is
487 // converted into a Java-level exception.
488 //
489 // Contract with Java-level exception handlers:
490 // rax: exception
491 // rdx: throwing pc
492 //
493 // NOTE: At entry of this stub, exception-pc must be on stack !!
494
495 address StubGenerator::generate_forward_exception() {
496 StubCodeMark mark(this, "StubRoutines", "forward exception");
497 address start = __ pc();
498
499 // Upon entry, the sp points to the return address returning into
500 // Java (interpreted or compiled) code; i.e., the return address
501 // becomes the throwing pc.
502 //
503 // Arguments pushed before the runtime call are still on the stack
504 // but the exception handler will reset the stack pointer ->
505 // ignore them. A potential result in registers can be ignored as
506 // well.
507
508 #ifdef ASSERT
509 // make sure this code is only executed if there is a pending exception
510 {
511 Label L;
512 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
513 __ jcc(Assembler::notEqual, L);
514 __ stop("StubRoutines::forward exception: no pending exception (1)");
515 __ bind(L);
516 }
517 #endif
518
519 // compute exception handler into rbx
520 __ movptr(c_rarg0, Address(rsp, 0));
521 BLOCK_COMMENT("call exception_handler_for_return_address");
522 __ call_VM_leaf(CAST_FROM_FN_PTR(address,
523 SharedRuntime::exception_handler_for_return_address),
524 r15_thread, c_rarg0);
525 __ mov(rbx, rax);
526
527 // setup rax & rdx, remove return address & clear pending exception
528 __ pop(rdx);
529 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset()));
530 __ movptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
531
532 #ifdef ASSERT
533 // make sure exception is set
534 {
535 Label L;
536 __ testptr(rax, rax);
537 __ jcc(Assembler::notEqual, L);
538 __ stop("StubRoutines::forward exception: no pending exception (2)");
539 __ bind(L);
540 }
541 #endif
542
543 // continue at exception handler (return address removed)
544 // rax: exception
545 // rbx: exception handler
546 // rdx: throwing pc
547 __ verify_oop(rax);
548 __ jmp(rbx);
549
550 return start;
551 }
552
553 // Support for intptr_t OrderAccess::fence()
554 //
555 // Arguments :
556 //
557 // Result:
558 address StubGenerator::generate_orderaccess_fence() {
559 StubCodeMark mark(this, "StubRoutines", "orderaccess_fence");
560 address start = __ pc();
561
562 __ membar(Assembler::StoreLoad);
563 __ ret(0);
564
565 return start;
566 }
567
568
569 // Support for intptr_t get_previous_sp()
570 //
571 // This routine is used to find the previous stack pointer for the
572 // caller.
573 address StubGenerator::generate_get_previous_sp() {
574 StubCodeMark mark(this, "StubRoutines", "get_previous_sp");
575 address start = __ pc();
576
577 __ movptr(rax, rsp);
578 __ addptr(rax, 8); // return address is at the top of the stack.
579 __ ret(0);
580
581 return start;
582 }
583
584 //----------------------------------------------------------------------------------------------------
585 // Support for void verify_mxcsr()
586 //
587 // This routine is used with -Xcheck:jni to verify that native
588 // JNI code does not return to Java code without restoring the
589 // MXCSR register to our expected state.
590
591 address StubGenerator::generate_verify_mxcsr() {
592 StubCodeMark mark(this, "StubRoutines", "verify_mxcsr");
593 address start = __ pc();
594
595 const Address mxcsr_save(rsp, 0);
596
597 if (CheckJNICalls) {
598 Label ok_ret;
599 ExternalAddress mxcsr_std(StubRoutines::x86::addr_mxcsr_std());
600 __ push(rax);
601 __ subptr(rsp, wordSize); // allocate a temp location
602 __ stmxcsr(mxcsr_save);
603 __ movl(rax, mxcsr_save);
604 __ andl(rax, 0xFFC0); // Mask out any pending exceptions (only check control and mask bits)
605 __ cmp32(rax, mxcsr_std, rscratch1);
606 __ jcc(Assembler::equal, ok_ret);
607
608 __ warn("MXCSR changed by native JNI code, use -XX:+RestoreMXCSROnJNICall");
609
610 __ ldmxcsr(mxcsr_std, rscratch1);
611
612 __ bind(ok_ret);
613 __ addptr(rsp, wordSize);
614 __ pop(rax);
615 }
616
617 __ ret(0);
618
619 return start;
620 }
621
622 address StubGenerator::generate_f2i_fixup() {
623 StubCodeMark mark(this, "StubRoutines", "f2i_fixup");
624 Address inout(rsp, 5 * wordSize); // return address + 4 saves
625
626 address start = __ pc();
627
628 Label L;
629
630 __ push(rax);
631 __ push(c_rarg3);
632 __ push(c_rarg2);
633 __ push(c_rarg1);
634
635 __ movl(rax, 0x7f800000);
636 __ xorl(c_rarg3, c_rarg3);
637 __ movl(c_rarg2, inout);
638 __ movl(c_rarg1, c_rarg2);
639 __ andl(c_rarg1, 0x7fffffff);
640 __ cmpl(rax, c_rarg1); // NaN? -> 0
641 __ jcc(Assembler::negative, L);
642 __ testl(c_rarg2, c_rarg2); // signed ? min_jint : max_jint
643 __ movl(c_rarg3, 0x80000000);
644 __ movl(rax, 0x7fffffff);
645 __ cmovl(Assembler::positive, c_rarg3, rax);
646
647 __ bind(L);
648 __ movptr(inout, c_rarg3);
649
650 __ pop(c_rarg1);
651 __ pop(c_rarg2);
652 __ pop(c_rarg3);
653 __ pop(rax);
654
655 __ ret(0);
656
657 return start;
658 }
659
660 address StubGenerator::generate_f2l_fixup() {
661 StubCodeMark mark(this, "StubRoutines", "f2l_fixup");
662 Address inout(rsp, 5 * wordSize); // return address + 4 saves
663 address start = __ pc();
664
665 Label L;
666
667 __ push(rax);
668 __ push(c_rarg3);
669 __ push(c_rarg2);
670 __ push(c_rarg1);
671
672 __ movl(rax, 0x7f800000);
673 __ xorl(c_rarg3, c_rarg3);
674 __ movl(c_rarg2, inout);
675 __ movl(c_rarg1, c_rarg2);
676 __ andl(c_rarg1, 0x7fffffff);
677 __ cmpl(rax, c_rarg1); // NaN? -> 0
678 __ jcc(Assembler::negative, L);
679 __ testl(c_rarg2, c_rarg2); // signed ? min_jlong : max_jlong
680 __ mov64(c_rarg3, 0x8000000000000000);
681 __ mov64(rax, 0x7fffffffffffffff);
682 __ cmov(Assembler::positive, c_rarg3, rax);
683
684 __ bind(L);
685 __ movptr(inout, c_rarg3);
686
687 __ pop(c_rarg1);
688 __ pop(c_rarg2);
689 __ pop(c_rarg3);
690 __ pop(rax);
691
692 __ ret(0);
693
694 return start;
695 }
696
697 address StubGenerator::generate_d2i_fixup() {
698 StubCodeMark mark(this, "StubRoutines", "d2i_fixup");
699 Address inout(rsp, 6 * wordSize); // return address + 5 saves
700
701 address start = __ pc();
702
703 Label L;
704
705 __ push(rax);
706 __ push(c_rarg3);
707 __ push(c_rarg2);
708 __ push(c_rarg1);
709 __ push(c_rarg0);
710
711 __ movl(rax, 0x7ff00000);
712 __ movq(c_rarg2, inout);
713 __ movl(c_rarg3, c_rarg2);
714 __ mov(c_rarg1, c_rarg2);
715 __ mov(c_rarg0, c_rarg2);
716 __ negl(c_rarg3);
717 __ shrptr(c_rarg1, 0x20);
718 __ orl(c_rarg3, c_rarg2);
719 __ andl(c_rarg1, 0x7fffffff);
720 __ xorl(c_rarg2, c_rarg2);
721 __ shrl(c_rarg3, 0x1f);
722 __ orl(c_rarg1, c_rarg3);
723 __ cmpl(rax, c_rarg1);
724 __ jcc(Assembler::negative, L); // NaN -> 0
725 __ testptr(c_rarg0, c_rarg0); // signed ? min_jint : max_jint
726 __ movl(c_rarg2, 0x80000000);
727 __ movl(rax, 0x7fffffff);
728 __ cmov(Assembler::positive, c_rarg2, rax);
729
730 __ bind(L);
731 __ movptr(inout, c_rarg2);
732
733 __ pop(c_rarg0);
734 __ pop(c_rarg1);
735 __ pop(c_rarg2);
736 __ pop(c_rarg3);
737 __ pop(rax);
738
739 __ ret(0);
740
741 return start;
742 }
743
744 address StubGenerator::generate_d2l_fixup() {
745 StubCodeMark mark(this, "StubRoutines", "d2l_fixup");
746 Address inout(rsp, 6 * wordSize); // return address + 5 saves
747
748 address start = __ pc();
749
750 Label L;
751
752 __ push(rax);
753 __ push(c_rarg3);
754 __ push(c_rarg2);
755 __ push(c_rarg1);
756 __ push(c_rarg0);
757
758 __ movl(rax, 0x7ff00000);
759 __ movq(c_rarg2, inout);
760 __ movl(c_rarg3, c_rarg2);
761 __ mov(c_rarg1, c_rarg2);
762 __ mov(c_rarg0, c_rarg2);
763 __ negl(c_rarg3);
764 __ shrptr(c_rarg1, 0x20);
765 __ orl(c_rarg3, c_rarg2);
766 __ andl(c_rarg1, 0x7fffffff);
767 __ xorl(c_rarg2, c_rarg2);
768 __ shrl(c_rarg3, 0x1f);
769 __ orl(c_rarg1, c_rarg3);
770 __ cmpl(rax, c_rarg1);
771 __ jcc(Assembler::negative, L); // NaN -> 0
772 __ testq(c_rarg0, c_rarg0); // signed ? min_jlong : max_jlong
773 __ mov64(c_rarg2, 0x8000000000000000);
774 __ mov64(rax, 0x7fffffffffffffff);
775 __ cmovq(Assembler::positive, c_rarg2, rax);
776
777 __ bind(L);
778 __ movq(inout, c_rarg2);
779
780 __ pop(c_rarg0);
781 __ pop(c_rarg1);
782 __ pop(c_rarg2);
783 __ pop(c_rarg3);
784 __ pop(rax);
785
786 __ ret(0);
787
788 return start;
789 }
790
791 address StubGenerator::generate_count_leading_zeros_lut(const char *stub_name) {
792 __ align64();
793 StubCodeMark mark(this, "StubRoutines", stub_name);
794 address start = __ pc();
795
796 __ emit_data64(0x0101010102020304, relocInfo::none);
797 __ emit_data64(0x0000000000000000, relocInfo::none);
798 __ emit_data64(0x0101010102020304, relocInfo::none);
799 __ emit_data64(0x0000000000000000, relocInfo::none);
800 __ emit_data64(0x0101010102020304, relocInfo::none);
801 __ emit_data64(0x0000000000000000, relocInfo::none);
802 __ emit_data64(0x0101010102020304, relocInfo::none);
803 __ emit_data64(0x0000000000000000, relocInfo::none);
804
805 return start;
806 }
807
808 address StubGenerator::generate_popcount_avx_lut(const char *stub_name) {
809 __ align64();
810 StubCodeMark mark(this, "StubRoutines", stub_name);
811 address start = __ pc();
812
813 __ emit_data64(0x0302020102010100, relocInfo::none);
814 __ emit_data64(0x0403030203020201, relocInfo::none);
815 __ emit_data64(0x0302020102010100, relocInfo::none);
816 __ emit_data64(0x0403030203020201, relocInfo::none);
817 __ emit_data64(0x0302020102010100, relocInfo::none);
818 __ emit_data64(0x0403030203020201, relocInfo::none);
819 __ emit_data64(0x0302020102010100, relocInfo::none);
820 __ emit_data64(0x0403030203020201, relocInfo::none);
821
822 return start;
823 }
824
825 address StubGenerator::generate_iota_indices(const char *stub_name) {
826 __ align(CodeEntryAlignment);
827 StubCodeMark mark(this, "StubRoutines", stub_name);
828 address start = __ pc();
829 // B
830 __ emit_data64(0x0706050403020100, relocInfo::none);
831 __ emit_data64(0x0F0E0D0C0B0A0908, relocInfo::none);
832 __ emit_data64(0x1716151413121110, relocInfo::none);
833 __ emit_data64(0x1F1E1D1C1B1A1918, relocInfo::none);
834 __ emit_data64(0x2726252423222120, relocInfo::none);
835 __ emit_data64(0x2F2E2D2C2B2A2928, relocInfo::none);
836 __ emit_data64(0x3736353433323130, relocInfo::none);
837 __ emit_data64(0x3F3E3D3C3B3A3938, relocInfo::none);
838 // W
839 __ emit_data64(0x0003000200010000, relocInfo::none);
840 __ emit_data64(0x0007000600050004, relocInfo::none);
841 __ emit_data64(0x000B000A00090008, relocInfo::none);
842 __ emit_data64(0x000F000E000D000C, relocInfo::none);
843 __ emit_data64(0x0013001200110010, relocInfo::none);
844 __ emit_data64(0x0017001600150014, relocInfo::none);
845 __ emit_data64(0x001B001A00190018, relocInfo::none);
846 __ emit_data64(0x001F001E001D001C, relocInfo::none);
847 // D
848 __ emit_data64(0x0000000100000000, relocInfo::none);
849 __ emit_data64(0x0000000300000002, relocInfo::none);
850 __ emit_data64(0x0000000500000004, relocInfo::none);
851 __ emit_data64(0x0000000700000006, relocInfo::none);
852 __ emit_data64(0x0000000900000008, relocInfo::none);
853 __ emit_data64(0x0000000B0000000A, relocInfo::none);
854 __ emit_data64(0x0000000D0000000C, relocInfo::none);
855 __ emit_data64(0x0000000F0000000E, relocInfo::none);
856 // Q
857 __ emit_data64(0x0000000000000000, relocInfo::none);
858 __ emit_data64(0x0000000000000001, relocInfo::none);
859 __ emit_data64(0x0000000000000002, relocInfo::none);
860 __ emit_data64(0x0000000000000003, relocInfo::none);
861 __ emit_data64(0x0000000000000004, relocInfo::none);
862 __ emit_data64(0x0000000000000005, relocInfo::none);
863 __ emit_data64(0x0000000000000006, relocInfo::none);
864 __ emit_data64(0x0000000000000007, relocInfo::none);
865 // D - FP
866 __ emit_data64(0x3F80000000000000, relocInfo::none); // 0.0f, 1.0f
867 __ emit_data64(0x4040000040000000, relocInfo::none); // 2.0f, 3.0f
868 __ emit_data64(0x40A0000040800000, relocInfo::none); // 4.0f, 5.0f
869 __ emit_data64(0x40E0000040C00000, relocInfo::none); // 6.0f, 7.0f
870 __ emit_data64(0x4110000041000000, relocInfo::none); // 8.0f, 9.0f
871 __ emit_data64(0x4130000041200000, relocInfo::none); // 10.0f, 11.0f
872 __ emit_data64(0x4150000041400000, relocInfo::none); // 12.0f, 13.0f
873 __ emit_data64(0x4170000041600000, relocInfo::none); // 14.0f, 15.0f
874 // Q - FP
875 __ emit_data64(0x0000000000000000, relocInfo::none); // 0.0d
876 __ emit_data64(0x3FF0000000000000, relocInfo::none); // 1.0d
877 __ emit_data64(0x4000000000000000, relocInfo::none); // 2.0d
878 __ emit_data64(0x4008000000000000, relocInfo::none); // 3.0d
879 __ emit_data64(0x4010000000000000, relocInfo::none); // 4.0d
880 __ emit_data64(0x4014000000000000, relocInfo::none); // 5.0d
881 __ emit_data64(0x4018000000000000, relocInfo::none); // 6.0d
882 __ emit_data64(0x401c000000000000, relocInfo::none); // 7.0d
883 return start;
884 }
885
886 address StubGenerator::generate_vector_reverse_bit_lut(const char *stub_name) {
887 __ align(CodeEntryAlignment);
888 StubCodeMark mark(this, "StubRoutines", stub_name);
889 address start = __ pc();
890
891 __ emit_data64(0x0E060A020C040800, relocInfo::none);
892 __ emit_data64(0x0F070B030D050901, relocInfo::none);
893 __ emit_data64(0x0E060A020C040800, relocInfo::none);
894 __ emit_data64(0x0F070B030D050901, relocInfo::none);
895 __ emit_data64(0x0E060A020C040800, relocInfo::none);
896 __ emit_data64(0x0F070B030D050901, relocInfo::none);
897 __ emit_data64(0x0E060A020C040800, relocInfo::none);
898 __ emit_data64(0x0F070B030D050901, relocInfo::none);
899
900 return start;
901 }
902
903 address StubGenerator::generate_vector_reverse_byte_perm_mask_long(const char *stub_name) {
904 __ align(CodeEntryAlignment);
905 StubCodeMark mark(this, "StubRoutines", stub_name);
906 address start = __ pc();
907
908 __ emit_data64(0x0001020304050607, relocInfo::none);
909 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
910 __ emit_data64(0x0001020304050607, relocInfo::none);
911 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
912 __ emit_data64(0x0001020304050607, relocInfo::none);
913 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
914 __ emit_data64(0x0001020304050607, relocInfo::none);
915 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
916
917 return start;
918 }
919
920 address StubGenerator::generate_vector_reverse_byte_perm_mask_int(const char *stub_name) {
921 __ align(CodeEntryAlignment);
922 StubCodeMark mark(this, "StubRoutines", stub_name);
923 address start = __ pc();
924
925 __ emit_data64(0x0405060700010203, relocInfo::none);
926 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
927 __ emit_data64(0x0405060700010203, relocInfo::none);
928 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
929 __ emit_data64(0x0405060700010203, relocInfo::none);
930 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
931 __ emit_data64(0x0405060700010203, relocInfo::none);
932 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
933
934 return start;
935 }
936
937 address StubGenerator::generate_vector_reverse_byte_perm_mask_short(const char *stub_name) {
938 __ align(CodeEntryAlignment);
939 StubCodeMark mark(this, "StubRoutines", stub_name);
940 address start = __ pc();
941
942 __ emit_data64(0x0607040502030001, relocInfo::none);
943 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
944 __ emit_data64(0x0607040502030001, relocInfo::none);
945 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
946 __ emit_data64(0x0607040502030001, relocInfo::none);
947 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
948 __ emit_data64(0x0607040502030001, relocInfo::none);
949 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
950
951 return start;
952 }
953
954 address StubGenerator::generate_vector_byte_shuffle_mask(const char *stub_name) {
955 __ align(CodeEntryAlignment);
956 StubCodeMark mark(this, "StubRoutines", stub_name);
957 address start = __ pc();
958
959 __ emit_data64(0x7070707070707070, relocInfo::none);
960 __ emit_data64(0x7070707070707070, relocInfo::none);
961 __ emit_data64(0xF0F0F0F0F0F0F0F0, relocInfo::none);
962 __ emit_data64(0xF0F0F0F0F0F0F0F0, relocInfo::none);
963
964 return start;
965 }
966
967 address StubGenerator::generate_fp_mask(const char *stub_name, int64_t mask) {
968 __ align(CodeEntryAlignment);
969 StubCodeMark mark(this, "StubRoutines", stub_name);
970 address start = __ pc();
971
972 __ emit_data64( mask, relocInfo::none );
973 __ emit_data64( mask, relocInfo::none );
974
975 return start;
976 }
977
978 address StubGenerator::generate_vector_mask(const char *stub_name, int64_t mask) {
979 __ align(CodeEntryAlignment);
980 StubCodeMark mark(this, "StubRoutines", stub_name);
981 address start = __ pc();
982
983 __ emit_data64(mask, relocInfo::none);
984 __ emit_data64(mask, relocInfo::none);
985 __ emit_data64(mask, relocInfo::none);
986 __ emit_data64(mask, relocInfo::none);
987 __ emit_data64(mask, relocInfo::none);
988 __ emit_data64(mask, relocInfo::none);
989 __ emit_data64(mask, relocInfo::none);
990 __ emit_data64(mask, relocInfo::none);
991
992 return start;
993 }
994
995 address StubGenerator::generate_vector_byte_perm_mask(const char *stub_name) {
996 __ align(CodeEntryAlignment);
997 StubCodeMark mark(this, "StubRoutines", stub_name);
998 address start = __ pc();
999
1000 __ emit_data64(0x0000000000000001, relocInfo::none);
1001 __ emit_data64(0x0000000000000003, relocInfo::none);
1002 __ emit_data64(0x0000000000000005, relocInfo::none);
1003 __ emit_data64(0x0000000000000007, relocInfo::none);
1004 __ emit_data64(0x0000000000000000, relocInfo::none);
1005 __ emit_data64(0x0000000000000002, relocInfo::none);
1006 __ emit_data64(0x0000000000000004, relocInfo::none);
1007 __ emit_data64(0x0000000000000006, relocInfo::none);
1008
1009 return start;
1010 }
1011
1012 address StubGenerator::generate_vector_fp_mask(const char *stub_name, int64_t mask) {
1013 __ align(CodeEntryAlignment);
1014 StubCodeMark mark(this, "StubRoutines", stub_name);
1015 address start = __ pc();
1016
1017 __ emit_data64(mask, relocInfo::none);
1018 __ emit_data64(mask, relocInfo::none);
1019 __ emit_data64(mask, relocInfo::none);
1020 __ emit_data64(mask, relocInfo::none);
1021 __ emit_data64(mask, relocInfo::none);
1022 __ emit_data64(mask, relocInfo::none);
1023 __ emit_data64(mask, relocInfo::none);
1024 __ emit_data64(mask, relocInfo::none);
1025
1026 return start;
1027 }
1028
1029 address StubGenerator::generate_vector_custom_i32(const char *stub_name, Assembler::AvxVectorLen len,
1030 int32_t val0, int32_t val1, int32_t val2, int32_t val3,
1031 int32_t val4, int32_t val5, int32_t val6, int32_t val7,
1032 int32_t val8, int32_t val9, int32_t val10, int32_t val11,
1033 int32_t val12, int32_t val13, int32_t val14, int32_t val15) {
1034 __ align(CodeEntryAlignment);
1035 StubCodeMark mark(this, "StubRoutines", stub_name);
1036 address start = __ pc();
1037
1038 assert(len != Assembler::AVX_NoVec, "vector len must be specified");
1039 __ emit_data(val0, relocInfo::none, 0);
1040 __ emit_data(val1, relocInfo::none, 0);
1041 __ emit_data(val2, relocInfo::none, 0);
1042 __ emit_data(val3, relocInfo::none, 0);
1043 if (len >= Assembler::AVX_256bit) {
1044 __ emit_data(val4, relocInfo::none, 0);
1045 __ emit_data(val5, relocInfo::none, 0);
1046 __ emit_data(val6, relocInfo::none, 0);
1047 __ emit_data(val7, relocInfo::none, 0);
1048 if (len >= Assembler::AVX_512bit) {
1049 __ emit_data(val8, relocInfo::none, 0);
1050 __ emit_data(val9, relocInfo::none, 0);
1051 __ emit_data(val10, relocInfo::none, 0);
1052 __ emit_data(val11, relocInfo::none, 0);
1053 __ emit_data(val12, relocInfo::none, 0);
1054 __ emit_data(val13, relocInfo::none, 0);
1055 __ emit_data(val14, relocInfo::none, 0);
1056 __ emit_data(val15, relocInfo::none, 0);
1057 }
1058 }
1059 return start;
1060 }
1061
1062 // Non-destructive plausibility checks for oops
1063 //
1064 // Arguments:
1065 // all args on stack!
1066 //
1067 // Stack after saving c_rarg3:
1068 // [tos + 0]: saved c_rarg3
1069 // [tos + 1]: saved c_rarg2
1070 // [tos + 2]: saved r12 (several TemplateTable methods use it)
1071 // [tos + 3]: saved flags
1072 // [tos + 4]: return address
1073 // * [tos + 5]: error message (char*)
1074 // * [tos + 6]: object to verify (oop)
1075 // * [tos + 7]: saved rax - saved by caller and bashed
1076 // * [tos + 8]: saved r10 (rscratch1) - saved by caller
1077 // * = popped on exit
1078 address StubGenerator::generate_verify_oop() {
1079 StubCodeMark mark(this, "StubRoutines", "verify_oop");
1080 address start = __ pc();
1081
1082 Label exit, error;
1083
1084 __ pushf();
1085 __ incrementl(ExternalAddress((address) StubRoutines::verify_oop_count_addr()), rscratch1);
1086
1087 __ push(r12);
1088
1089 // save c_rarg2 and c_rarg3
1090 __ push(c_rarg2);
1091 __ push(c_rarg3);
1092
1093 enum {
1094 // After previous pushes.
1095 oop_to_verify = 6 * wordSize,
1096 saved_rax = 7 * wordSize,
1097 saved_r10 = 8 * wordSize,
1098
1099 // Before the call to MacroAssembler::debug(), see below.
1100 return_addr = 16 * wordSize,
1101 error_msg = 17 * wordSize
1102 };
1103
1104 // get object
1105 __ movptr(rax, Address(rsp, oop_to_verify));
1106
1107 // make sure object is 'reasonable'
1108 __ testptr(rax, rax);
1109 __ jcc(Assembler::zero, exit); // if obj is null it is OK
1110
1111 BarrierSetAssembler* bs_asm = BarrierSet::barrier_set()->barrier_set_assembler();
1112 bs_asm->check_oop(_masm, rax, c_rarg2, c_rarg3, error);
1113
1114 // return if everything seems ok
1115 __ bind(exit);
1116 __ movptr(rax, Address(rsp, saved_rax)); // get saved rax back
1117 __ movptr(rscratch1, Address(rsp, saved_r10)); // get saved r10 back
1118 __ pop(c_rarg3); // restore c_rarg3
1119 __ pop(c_rarg2); // restore c_rarg2
1120 __ pop(r12); // restore r12
1121 __ popf(); // restore flags
1122 __ ret(4 * wordSize); // pop caller saved stuff
1123
1124 // handle errors
1125 __ bind(error);
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); // get saved c_rarg3 back
1129 __ pop(c_rarg2); // get saved c_rarg2 back
1130 __ pop(r12); // get saved r12 back
1131 __ popf(); // get saved flags off stack --
1132 // will be ignored
1133
1134 __ pusha(); // push registers
1135 // (rip is already
1136 // already pushed)
1137 // debug(char* msg, int64_t pc, int64_t regs[])
1138 // We've popped the registers we'd saved (c_rarg3, c_rarg2 and flags), and
1139 // pushed all the registers, so now the stack looks like:
1140 // [tos + 0] 16 saved registers
1141 // [tos + 16] return address
1142 // * [tos + 17] error message (char*)
1143 // * [tos + 18] object to verify (oop)
1144 // * [tos + 19] saved rax - saved by caller and bashed
1145 // * [tos + 20] saved r10 (rscratch1) - saved by caller
1146 // * = popped on exit
1147
1148 __ movptr(c_rarg0, Address(rsp, error_msg)); // pass address of error message
1149 __ movptr(c_rarg1, Address(rsp, return_addr)); // pass return address
1150 __ movq(c_rarg2, rsp); // pass address of regs on stack
1151 __ mov(r12, rsp); // remember rsp
1152 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1153 __ andptr(rsp, -16); // align stack as required by ABI
1154 BLOCK_COMMENT("call MacroAssembler::debug");
1155 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64)));
1156 __ hlt();
1157
1158 return start;
1159 }
1160
1161
1162 // Shuffle first three arg regs on Windows into Linux/Solaris locations.
1163 //
1164 // Outputs:
1165 // rdi - rcx
1166 // rsi - rdx
1167 // rdx - r8
1168 // rcx - r9
1169 //
1170 // Registers r9 and r10 are used to save rdi and rsi on Windows, which latter
1171 // are non-volatile. r9 and r10 should not be used by the caller.
1172 //
1173 void StubGenerator::setup_arg_regs(int nargs) {
1174 const Register saved_rdi = r9;
1175 const Register saved_rsi = r10;
1176 assert(nargs == 3 || nargs == 4, "else fix");
1177 #ifdef _WIN64
1178 assert(c_rarg0 == rcx && c_rarg1 == rdx && c_rarg2 == r8 && c_rarg3 == r9,
1179 "unexpected argument registers");
1180 if (nargs == 4) {
1181 __ mov(rax, r9); // r9 is also saved_rdi
1182 }
1183 __ movptr(saved_rdi, rdi);
1184 __ movptr(saved_rsi, rsi);
1185 __ mov(rdi, rcx); // c_rarg0
1186 __ mov(rsi, rdx); // c_rarg1
1187 __ mov(rdx, r8); // c_rarg2
1188 if (nargs == 4) {
1189 __ mov(rcx, rax); // c_rarg3 (via rax)
1190 }
1191 #else
1192 assert(c_rarg0 == rdi && c_rarg1 == rsi && c_rarg2 == rdx && c_rarg3 == rcx,
1193 "unexpected argument registers");
1194 #endif
1195 DEBUG_ONLY(_regs_in_thread = false;)
1196 }
1197
1198
1199 void StubGenerator::restore_arg_regs() {
1200 assert(!_regs_in_thread, "wrong call to restore_arg_regs");
1201 const Register saved_rdi = r9;
1202 const Register saved_rsi = r10;
1203 #ifdef _WIN64
1204 __ movptr(rdi, saved_rdi);
1205 __ movptr(rsi, saved_rsi);
1206 #endif
1207 }
1208
1209
1210 // This is used in places where r10 is a scratch register, and can
1211 // be adapted if r9 is needed also.
1212 void StubGenerator::setup_arg_regs_using_thread(int nargs) {
1213 const Register saved_r15 = r9;
1214 assert(nargs == 3 || nargs == 4, "else fix");
1215 #ifdef _WIN64
1216 if (nargs == 4) {
1217 __ mov(rax, r9); // r9 is also saved_r15
1218 }
1219 __ mov(saved_r15, r15); // r15 is callee saved and needs to be restored
1220 __ get_thread(r15_thread);
1221 assert(c_rarg0 == rcx && c_rarg1 == rdx && c_rarg2 == r8 && c_rarg3 == r9,
1222 "unexpected argument registers");
1223 __ movptr(Address(r15_thread, in_bytes(JavaThread::windows_saved_rdi_offset())), rdi);
1224 __ movptr(Address(r15_thread, in_bytes(JavaThread::windows_saved_rsi_offset())), rsi);
1225
1226 __ mov(rdi, rcx); // c_rarg0
1227 __ mov(rsi, rdx); // c_rarg1
1228 __ mov(rdx, r8); // c_rarg2
1229 if (nargs == 4) {
1230 __ mov(rcx, rax); // c_rarg3 (via rax)
1231 }
1232 #else
1233 assert(c_rarg0 == rdi && c_rarg1 == rsi && c_rarg2 == rdx && c_rarg3 == rcx,
1234 "unexpected argument registers");
1235 #endif
1236 DEBUG_ONLY(_regs_in_thread = true;)
1237 }
1238
1239
1240 void StubGenerator::restore_arg_regs_using_thread() {
1241 assert(_regs_in_thread, "wrong call to restore_arg_regs");
1242 const Register saved_r15 = r9;
1243 #ifdef _WIN64
1244 __ get_thread(r15_thread);
1245 __ movptr(rsi, Address(r15_thread, in_bytes(JavaThread::windows_saved_rsi_offset())));
1246 __ movptr(rdi, Address(r15_thread, in_bytes(JavaThread::windows_saved_rdi_offset())));
1247 __ mov(r15, saved_r15); // r15 is callee saved and needs to be restored
1248 #endif
1249 }
1250
1251
1252 void StubGenerator::setup_argument_regs(BasicType type) {
1253 if (type == T_BYTE || type == T_SHORT) {
1254 setup_arg_regs(); // from => rdi, to => rsi, count => rdx
1255 // r9 and r10 may be used to save non-volatile registers
1256 } else {
1257 setup_arg_regs_using_thread(); // from => rdi, to => rsi, count => rdx
1258 // r9 is used to save r15_thread
1259 }
1260 }
1261
1262
1263 void StubGenerator::restore_argument_regs(BasicType type) {
1264 if (type == T_BYTE || type == T_SHORT) {
1265 restore_arg_regs();
1266 } else {
1267 restore_arg_regs_using_thread();
1268 }
1269 }
1270
1271 address StubGenerator::generate_data_cache_writeback() {
1272 const Register src = c_rarg0; // source address
1273
1274 __ align(CodeEntryAlignment);
1275
1276 StubCodeMark mark(this, "StubRoutines", "_data_cache_writeback");
1277
1278 address start = __ pc();
1279
1280 __ enter();
1281 __ cache_wb(Address(src, 0));
1282 __ leave();
1283 __ ret(0);
1284
1285 return start;
1286 }
1287
1288 address StubGenerator::generate_data_cache_writeback_sync() {
1289 const Register is_pre = c_rarg0; // pre or post sync
1290
1291 __ align(CodeEntryAlignment);
1292
1293 StubCodeMark mark(this, "StubRoutines", "_data_cache_writeback_sync");
1294
1295 // pre wbsync is a no-op
1296 // post wbsync translates to an sfence
1297
1298 Label skip;
1299 address start = __ pc();
1300
1301 __ enter();
1302 __ cmpl(is_pre, 0);
1303 __ jcc(Assembler::notEqual, skip);
1304 __ cache_wbsync(false);
1305 __ bind(skip);
1306 __ leave();
1307 __ ret(0);
1308
1309 return start;
1310 }
1311
1312 // ofs and limit are use for multi-block byte array.
1313 // int com.sun.security.provider.MD5.implCompress(byte[] b, int ofs)
1314 address StubGenerator::generate_md5_implCompress(bool multi_block, const char *name) {
1315 __ align(CodeEntryAlignment);
1316 StubCodeMark mark(this, "StubRoutines", name);
1317 address start = __ pc();
1318
1319 const Register buf_param = r15;
1320 const Address state_param(rsp, 0 * wordSize);
1321 const Address ofs_param (rsp, 1 * wordSize );
1322 const Address limit_param(rsp, 1 * wordSize + 4);
1323
1324 __ enter();
1325 __ push(rbx);
1326 __ push(rdi);
1327 __ push(rsi);
1328 __ push(r15);
1329 __ subptr(rsp, 2 * wordSize);
1330
1331 __ movptr(buf_param, c_rarg0);
1332 __ movptr(state_param, c_rarg1);
1333 if (multi_block) {
1334 __ movl(ofs_param, c_rarg2);
1335 __ movl(limit_param, c_rarg3);
1336 }
1337 __ fast_md5(buf_param, state_param, ofs_param, limit_param, multi_block);
1338
1339 __ addptr(rsp, 2 * wordSize);
1340 __ pop(r15);
1341 __ pop(rsi);
1342 __ pop(rdi);
1343 __ pop(rbx);
1344 __ leave();
1345 __ ret(0);
1346
1347 return start;
1348 }
1349
1350 address StubGenerator::generate_upper_word_mask() {
1351 __ align64();
1352 StubCodeMark mark(this, "StubRoutines", "upper_word_mask");
1353 address start = __ pc();
1354
1355 __ emit_data64(0x0000000000000000, relocInfo::none);
1356 __ emit_data64(0xFFFFFFFF00000000, relocInfo::none);
1357
1358 return start;
1359 }
1360
1361 address StubGenerator::generate_shuffle_byte_flip_mask() {
1362 __ align64();
1363 StubCodeMark mark(this, "StubRoutines", "shuffle_byte_flip_mask");
1364 address start = __ pc();
1365
1366 __ emit_data64(0x08090a0b0c0d0e0f, relocInfo::none);
1367 __ emit_data64(0x0001020304050607, relocInfo::none);
1368
1369 return start;
1370 }
1371
1372 // ofs and limit are use for multi-block byte array.
1373 // int com.sun.security.provider.DigestBase.implCompressMultiBlock(byte[] b, int ofs, int limit)
1374 address StubGenerator::generate_sha1_implCompress(bool multi_block, const char *name) {
1375 __ align(CodeEntryAlignment);
1376 StubCodeMark mark(this, "StubRoutines", name);
1377 address start = __ pc();
1378
1379 Register buf = c_rarg0;
1380 Register state = c_rarg1;
1381 Register ofs = c_rarg2;
1382 Register limit = c_rarg3;
1383
1384 const XMMRegister abcd = xmm0;
1385 const XMMRegister e0 = xmm1;
1386 const XMMRegister e1 = xmm2;
1387 const XMMRegister msg0 = xmm3;
1388
1389 const XMMRegister msg1 = xmm4;
1390 const XMMRegister msg2 = xmm5;
1391 const XMMRegister msg3 = xmm6;
1392 const XMMRegister shuf_mask = xmm7;
1393
1394 __ enter();
1395
1396 __ subptr(rsp, 4 * wordSize);
1397
1398 __ fast_sha1(abcd, e0, e1, msg0, msg1, msg2, msg3, shuf_mask,
1399 buf, state, ofs, limit, rsp, multi_block);
1400
1401 __ addptr(rsp, 4 * wordSize);
1402
1403 __ leave();
1404 __ ret(0);
1405
1406 return start;
1407 }
1408
1409 address StubGenerator::generate_pshuffle_byte_flip_mask() {
1410 __ align64();
1411 StubCodeMark mark(this, "StubRoutines", "pshuffle_byte_flip_mask");
1412 address start = __ pc();
1413
1414 __ emit_data64(0x0405060700010203, relocInfo::none);
1415 __ emit_data64(0x0c0d0e0f08090a0b, relocInfo::none);
1416
1417 if (VM_Version::supports_avx2()) {
1418 __ emit_data64(0x0405060700010203, relocInfo::none); // second copy
1419 __ emit_data64(0x0c0d0e0f08090a0b, relocInfo::none);
1420 // _SHUF_00BA
1421 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1422 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1423 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1424 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1425 // _SHUF_DC00
1426 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1427 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1428 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1429 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1430 }
1431
1432 return start;
1433 }
1434
1435 //Mask for byte-swapping a couple of qwords in an XMM register using (v)pshufb.
1436 address StubGenerator::generate_pshuffle_byte_flip_mask_sha512() {
1437 __ align32();
1438 StubCodeMark mark(this, "StubRoutines", "pshuffle_byte_flip_mask_sha512");
1439 address start = __ pc();
1440
1441 if (VM_Version::supports_avx2()) {
1442 __ emit_data64(0x0001020304050607, relocInfo::none); // PSHUFFLE_BYTE_FLIP_MASK
1443 __ emit_data64(0x08090a0b0c0d0e0f, relocInfo::none);
1444 __ emit_data64(0x1011121314151617, relocInfo::none);
1445 __ emit_data64(0x18191a1b1c1d1e1f, relocInfo::none);
1446 __ emit_data64(0x0000000000000000, relocInfo::none); //MASK_YMM_LO
1447 __ emit_data64(0x0000000000000000, relocInfo::none);
1448 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1449 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1450 }
1451
1452 return start;
1453 }
1454
1455 // ofs and limit are use for multi-block byte array.
1456 // int com.sun.security.provider.DigestBase.implCompressMultiBlock(byte[] b, int ofs, int limit)
1457 address StubGenerator::generate_sha256_implCompress(bool multi_block, const char *name) {
1458 assert(VM_Version::supports_sha() || VM_Version::supports_avx2(), "");
1459 __ align(CodeEntryAlignment);
1460 StubCodeMark mark(this, "StubRoutines", name);
1461 address start = __ pc();
1462
1463 Register buf = c_rarg0;
1464 Register state = c_rarg1;
1465 Register ofs = c_rarg2;
1466 Register limit = c_rarg3;
1467
1468 const XMMRegister msg = xmm0;
1469 const XMMRegister state0 = xmm1;
1470 const XMMRegister state1 = xmm2;
1471 const XMMRegister msgtmp0 = xmm3;
1472
1473 const XMMRegister msgtmp1 = xmm4;
1474 const XMMRegister msgtmp2 = xmm5;
1475 const XMMRegister msgtmp3 = xmm6;
1476 const XMMRegister msgtmp4 = xmm7;
1477
1478 const XMMRegister shuf_mask = xmm8;
1479
1480 __ enter();
1481
1482 __ subptr(rsp, 4 * wordSize);
1483
1484 if (VM_Version::supports_sha()) {
1485 __ fast_sha256(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
1486 buf, state, ofs, limit, rsp, multi_block, shuf_mask);
1487 } else if (VM_Version::supports_avx2()) {
1488 __ sha256_AVX2(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
1489 buf, state, ofs, limit, rsp, multi_block, shuf_mask);
1490 }
1491 __ addptr(rsp, 4 * wordSize);
1492 __ vzeroupper();
1493 __ leave();
1494 __ ret(0);
1495
1496 return start;
1497 }
1498
1499 address StubGenerator::generate_sha512_implCompress(bool multi_block, const char *name) {
1500 assert(VM_Version::supports_avx2(), "");
1501 assert(VM_Version::supports_bmi2(), "");
1502 __ align(CodeEntryAlignment);
1503 StubCodeMark mark(this, "StubRoutines", name);
1504 address start = __ pc();
1505
1506 Register buf = c_rarg0;
1507 Register state = c_rarg1;
1508 Register ofs = c_rarg2;
1509 Register limit = c_rarg3;
1510
1511 const XMMRegister msg = xmm0;
1512 const XMMRegister state0 = xmm1;
1513 const XMMRegister state1 = xmm2;
1514 const XMMRegister msgtmp0 = xmm3;
1515 const XMMRegister msgtmp1 = xmm4;
1516 const XMMRegister msgtmp2 = xmm5;
1517 const XMMRegister msgtmp3 = xmm6;
1518 const XMMRegister msgtmp4 = xmm7;
1519
1520 const XMMRegister shuf_mask = xmm8;
1521
1522 __ enter();
1523
1524 __ sha512_AVX2(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
1525 buf, state, ofs, limit, rsp, multi_block, shuf_mask);
1526
1527 __ vzeroupper();
1528 __ leave();
1529 __ ret(0);
1530
1531 return start;
1532 }
1533
1534 address StubGenerator::base64_shuffle_addr() {
1535 __ align64();
1536 StubCodeMark mark(this, "StubRoutines", "shuffle_base64");
1537 address start = __ pc();
1538
1539 assert(((unsigned long long)start & 0x3f) == 0,
1540 "Alignment problem (0x%08llx)", (unsigned long long)start);
1541 __ emit_data64(0x0405030401020001, relocInfo::none);
1542 __ emit_data64(0x0a0b090a07080607, relocInfo::none);
1543 __ emit_data64(0x10110f100d0e0c0d, relocInfo::none);
1544 __ emit_data64(0x1617151613141213, relocInfo::none);
1545 __ emit_data64(0x1c1d1b1c191a1819, relocInfo::none);
1546 __ emit_data64(0x222321221f201e1f, relocInfo::none);
1547 __ emit_data64(0x2829272825262425, relocInfo::none);
1548 __ emit_data64(0x2e2f2d2e2b2c2a2b, relocInfo::none);
1549
1550 return start;
1551 }
1552
1553 address StubGenerator::base64_avx2_shuffle_addr() {
1554 __ align32();
1555 StubCodeMark mark(this, "StubRoutines", "avx2_shuffle_base64");
1556 address start = __ pc();
1557
1558 __ emit_data64(0x0809070805060405, relocInfo::none);
1559 __ emit_data64(0x0e0f0d0e0b0c0a0b, relocInfo::none);
1560 __ emit_data64(0x0405030401020001, relocInfo::none);
1561 __ emit_data64(0x0a0b090a07080607, relocInfo::none);
1562
1563 return start;
1564 }
1565
1566 address StubGenerator::base64_avx2_input_mask_addr() {
1567 __ align32();
1568 StubCodeMark mark(this, "StubRoutines", "avx2_input_mask_base64");
1569 address start = __ pc();
1570
1571 __ emit_data64(0x8000000000000000, relocInfo::none);
1572 __ emit_data64(0x8000000080000000, relocInfo::none);
1573 __ emit_data64(0x8000000080000000, relocInfo::none);
1574 __ emit_data64(0x8000000080000000, relocInfo::none);
1575
1576 return start;
1577 }
1578
1579 address StubGenerator::base64_avx2_lut_addr() {
1580 __ align32();
1581 StubCodeMark mark(this, "StubRoutines", "avx2_lut_base64");
1582 address start = __ pc();
1583
1584 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
1585 __ emit_data64(0x0000f0edfcfcfcfc, relocInfo::none);
1586 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
1587 __ emit_data64(0x0000f0edfcfcfcfc, relocInfo::none);
1588
1589 // URL LUT
1590 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
1591 __ emit_data64(0x000020effcfcfcfc, relocInfo::none);
1592 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
1593 __ emit_data64(0x000020effcfcfcfc, relocInfo::none);
1594
1595 return start;
1596 }
1597
1598 address StubGenerator::base64_encoding_table_addr() {
1599 __ align64();
1600 StubCodeMark mark(this, "StubRoutines", "encoding_table_base64");
1601 address start = __ pc();
1602
1603 assert(((unsigned long long)start & 0x3f) == 0, "Alignment problem (0x%08llx)", (unsigned long long)start);
1604 __ emit_data64(0x4847464544434241, relocInfo::none);
1605 __ emit_data64(0x504f4e4d4c4b4a49, relocInfo::none);
1606 __ emit_data64(0x5857565554535251, relocInfo::none);
1607 __ emit_data64(0x6665646362615a59, relocInfo::none);
1608 __ emit_data64(0x6e6d6c6b6a696867, relocInfo::none);
1609 __ emit_data64(0x767574737271706f, relocInfo::none);
1610 __ emit_data64(0x333231307a797877, relocInfo::none);
1611 __ emit_data64(0x2f2b393837363534, relocInfo::none);
1612
1613 // URL table
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(0x5f2d393837363534, relocInfo::none);
1622
1623 return start;
1624 }
1625
1626 // Code for generating Base64 encoding.
1627 // Intrinsic function prototype in Base64.java:
1628 // private void encodeBlock(byte[] src, int sp, int sl, byte[] dst, int dp,
1629 // boolean isURL) {
1630 address StubGenerator::generate_base64_encodeBlock()
1631 {
1632 __ align(CodeEntryAlignment);
1633 StubCodeMark mark(this, "StubRoutines", "implEncode");
1634 address start = __ pc();
1635
1636 __ enter();
1637
1638 // Save callee-saved registers before using them
1639 __ push(r12);
1640 __ push(r13);
1641 __ push(r14);
1642 __ push(r15);
1643
1644 // arguments
1645 const Register source = c_rarg0; // Source Array
1646 const Register start_offset = c_rarg1; // start offset
1647 const Register end_offset = c_rarg2; // end offset
1648 const Register dest = c_rarg3; // destination array
1649
1650 #ifndef _WIN64
1651 const Register dp = c_rarg4; // Position for writing to dest array
1652 const Register isURL = c_rarg5; // Base64 or URL character set
1653 #else
1654 const Address dp_mem(rbp, 6 * wordSize); // length is on stack on Win64
1655 const Address isURL_mem(rbp, 7 * wordSize);
1656 const Register isURL = r10; // pick the volatile windows register
1657 const Register dp = r12;
1658 __ movl(dp, dp_mem);
1659 __ movl(isURL, isURL_mem);
1660 #endif
1661
1662 const Register length = r14;
1663 const Register encode_table = r13;
1664 Label L_process3, L_exit, L_processdata, L_vbmiLoop, L_not512, L_32byteLoop;
1665
1666 // calculate length from offsets
1667 __ movl(length, end_offset);
1668 __ subl(length, start_offset);
1669 __ jcc(Assembler::lessEqual, L_exit);
1670
1671 // Code for 512-bit VBMI encoding. Encodes 48 input bytes into 64
1672 // output bytes. We read 64 input bytes and ignore the last 16, so be
1673 // sure not to read past the end of the input buffer.
1674 if (VM_Version::supports_avx512_vbmi()) {
1675 __ cmpl(length, 64); // Do not overrun input buffer.
1676 __ jcc(Assembler::below, L_not512);
1677
1678 __ shll(isURL, 6); // index into decode table based on isURL
1679 __ lea(encode_table, ExternalAddress(StubRoutines::x86::base64_encoding_table_addr()));
1680 __ addptr(encode_table, isURL);
1681 __ shrl(isURL, 6); // restore isURL
1682
1683 __ mov64(rax, 0x3036242a1016040aull); // Shifts
1684 __ evmovdquq(xmm3, ExternalAddress(StubRoutines::x86::base64_shuffle_addr()), Assembler::AVX_512bit, r15);
1685 __ evmovdquq(xmm2, Address(encode_table, 0), Assembler::AVX_512bit);
1686 __ evpbroadcastq(xmm1, rax, Assembler::AVX_512bit);
1687
1688 __ align32();
1689 __ BIND(L_vbmiLoop);
1690
1691 __ vpermb(xmm0, xmm3, Address(source, start_offset), Assembler::AVX_512bit);
1692 __ subl(length, 48);
1693
1694 // Put the input bytes into the proper lanes for writing, then
1695 // encode them.
1696 __ evpmultishiftqb(xmm0, xmm1, xmm0, Assembler::AVX_512bit);
1697 __ vpermb(xmm0, xmm0, xmm2, Assembler::AVX_512bit);
1698
1699 // Write to destination
1700 __ evmovdquq(Address(dest, dp), xmm0, Assembler::AVX_512bit);
1701
1702 __ addptr(dest, 64);
1703 __ addptr(source, 48);
1704 __ cmpl(length, 64);
1705 __ jcc(Assembler::aboveEqual, L_vbmiLoop);
1706
1707 __ vzeroupper();
1708 }
1709
1710 __ BIND(L_not512);
1711 if (VM_Version::supports_avx2()) {
1712 /*
1713 ** This AVX2 encoder is based off the paper at:
1714 ** https://dl.acm.org/doi/10.1145/3132709
1715 **
1716 ** We use AVX2 SIMD instructions to encode 24 bytes into 32
1717 ** output bytes.
1718 **
1719 */
1720 // Lengths under 32 bytes are done with scalar routine
1721 __ cmpl(length, 31);
1722 __ jcc(Assembler::belowEqual, L_process3);
1723
1724 // Set up supporting constant table data
1725 __ vmovdqu(xmm9, ExternalAddress(StubRoutines::x86::base64_avx2_shuffle_addr()), rax);
1726 // 6-bit mask for 2nd and 4th (and multiples) 6-bit values
1727 __ movl(rax, 0x0fc0fc00);
1728 __ movdl(xmm8, rax);
1729 __ vmovdqu(xmm1, ExternalAddress(StubRoutines::x86::base64_avx2_input_mask_addr()), rax);
1730 __ vpbroadcastd(xmm8, xmm8, Assembler::AVX_256bit);
1731
1732 // Multiplication constant for "shifting" right by 6 and 10
1733 // bits
1734 __ movl(rax, 0x04000040);
1735
1736 __ subl(length, 24);
1737 __ movdl(xmm7, rax);
1738 __ vpbroadcastd(xmm7, xmm7, Assembler::AVX_256bit);
1739
1740 // For the first load, we mask off reading of the first 4
1741 // bytes into the register. This is so we can get 4 3-byte
1742 // chunks into each lane of the register, avoiding having to
1743 // handle end conditions. We then shuffle these bytes into a
1744 // specific order so that manipulation is easier.
1745 //
1746 // The initial read loads the XMM register like this:
1747 //
1748 // Lower 128-bit lane:
1749 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
1750 // | XX | XX | XX | XX | A0 | A1 | A2 | B0 | B1 | B2 | C0 | C1
1751 // | C2 | D0 | D1 | D2 |
1752 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
1753 //
1754 // Upper 128-bit lane:
1755 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
1756 // | E0 | E1 | E2 | F0 | F1 | F2 | G0 | G1 | G2 | H0 | H1 | H2
1757 // | XX | XX | XX | XX |
1758 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
1759 //
1760 // Where A0 is the first input byte, B0 is the fourth, etc.
1761 // The alphabetical significance denotes the 3 bytes to be
1762 // consumed and encoded into 4 bytes.
1763 //
1764 // We then shuffle the register so each 32-bit word contains
1765 // the sequence:
1766 // A1 A0 A2 A1, B1, B0, B2, B1, etc.
1767 // Each of these byte sequences are then manipulated into 4
1768 // 6-bit values ready for encoding.
1769 //
1770 // If we focus on one set of 3-byte chunks, changing the
1771 // nomenclature such that A0 => a, A1 => b, and A2 => c, we
1772 // shuffle such that each 24-bit chunk contains:
1773 //
1774 // b7 b6 b5 b4 b3 b2 b1 b0 | a7 a6 a5 a4 a3 a2 a1 a0 | c7 c6
1775 // c5 c4 c3 c2 c1 c0 | b7 b6 b5 b4 b3 b2 b1 b0
1776 // Explain this step.
1777 // b3 b2 b1 b0 c5 c4 c3 c2 | c1 c0 d5 d4 d3 d2 d1 d0 | a5 a4
1778 // a3 a2 a1 a0 b5 b4 | b3 b2 b1 b0 c5 c4 c3 c2
1779 //
1780 // W first and off all but bits 4-9 and 16-21 (c5..c0 and
1781 // a5..a0) and shift them using a vector multiplication
1782 // operation (vpmulhuw) which effectively shifts c right by 6
1783 // bits and a right by 10 bits. We similarly mask bits 10-15
1784 // (d5..d0) and 22-27 (b5..b0) and shift them left by 8 and 4
1785 // bits respectively. This is done using vpmullw. We end up
1786 // with 4 6-bit values, thus splitting the 3 input bytes,
1787 // ready for encoding:
1788 // 0 0 d5..d0 0 0 c5..c0 0 0 b5..b0 0 0 a5..a0
1789 //
1790 // For translation, we recognize that there are 5 distinct
1791 // ranges of legal Base64 characters as below:
1792 //
1793 // +-------------+-------------+------------+
1794 // | 6-bit value | ASCII range | offset |
1795 // +-------------+-------------+------------+
1796 // | 0..25 | A..Z | 65 |
1797 // | 26..51 | a..z | 71 |
1798 // | 52..61 | 0..9 | -4 |
1799 // | 62 | + or - | -19 or -17 |
1800 // | 63 | / or _ | -16 or 32 |
1801 // +-------------+-------------+------------+
1802 //
1803 // We note that vpshufb does a parallel lookup in a
1804 // destination register using the lower 4 bits of bytes from a
1805 // source register. If we use a saturated subtraction and
1806 // subtract 51 from each 6-bit value, bytes from [0,51]
1807 // saturate to 0, and [52,63] map to a range of [1,12]. We
1808 // distinguish the [0,25] and [26,51] ranges by assigning a
1809 // value of 13 for all 6-bit values less than 26. We end up
1810 // with:
1811 //
1812 // +-------------+-------------+------------+
1813 // | 6-bit value | Reduced | offset |
1814 // +-------------+-------------+------------+
1815 // | 0..25 | 13 | 65 |
1816 // | 26..51 | 0 | 71 |
1817 // | 52..61 | 0..9 | -4 |
1818 // | 62 | 11 | -19 or -17 |
1819 // | 63 | 12 | -16 or 32 |
1820 // +-------------+-------------+------------+
1821 //
1822 // We then use a final vpshufb to add the appropriate offset,
1823 // translating the bytes.
1824 //
1825 // Load input bytes - only 28 bytes. Mask the first load to
1826 // not load into the full register.
1827 __ vpmaskmovd(xmm1, xmm1, Address(source, start_offset, Address::times_1, -4), Assembler::AVX_256bit);
1828
1829 // Move 3-byte chunks of input (12 bytes) into 16 bytes,
1830 // ordering by:
1831 // 1, 0, 2, 1; 4, 3, 5, 4; etc. This groups 6-bit chunks
1832 // for easy masking
1833 __ vpshufb(xmm1, xmm1, xmm9, Assembler::AVX_256bit);
1834
1835 __ addl(start_offset, 24);
1836
1837 // Load masking register for first and third (and multiples)
1838 // 6-bit values.
1839 __ movl(rax, 0x003f03f0);
1840 __ movdl(xmm6, rax);
1841 __ vpbroadcastd(xmm6, xmm6, Assembler::AVX_256bit);
1842 // Multiplication constant for "shifting" left by 4 and 8 bits
1843 __ movl(rax, 0x01000010);
1844 __ movdl(xmm5, rax);
1845 __ vpbroadcastd(xmm5, xmm5, Assembler::AVX_256bit);
1846
1847 // Isolate 6-bit chunks of interest
1848 __ vpand(xmm0, xmm8, xmm1, Assembler::AVX_256bit);
1849
1850 // Load constants for encoding
1851 __ movl(rax, 0x19191919);
1852 __ movdl(xmm3, rax);
1853 __ vpbroadcastd(xmm3, xmm3, Assembler::AVX_256bit);
1854 __ movl(rax, 0x33333333);
1855 __ movdl(xmm4, rax);
1856 __ vpbroadcastd(xmm4, xmm4, Assembler::AVX_256bit);
1857
1858 // Shift output bytes 0 and 2 into proper lanes
1859 __ vpmulhuw(xmm2, xmm0, xmm7, Assembler::AVX_256bit);
1860
1861 // Mask and shift output bytes 1 and 3 into proper lanes and
1862 // combine
1863 __ vpand(xmm0, xmm6, xmm1, Assembler::AVX_256bit);
1864 __ vpmullw(xmm0, xmm5, xmm0, Assembler::AVX_256bit);
1865 __ vpor(xmm0, xmm0, xmm2, Assembler::AVX_256bit);
1866
1867 // Find out which are 0..25. This indicates which input
1868 // values fall in the range of 'A'-'Z', which require an
1869 // additional offset (see comments above)
1870 __ vpcmpgtb(xmm2, xmm0, xmm3, Assembler::AVX_256bit);
1871 __ vpsubusb(xmm1, xmm0, xmm4, Assembler::AVX_256bit);
1872 __ vpsubb(xmm1, xmm1, xmm2, Assembler::AVX_256bit);
1873
1874 // Load the proper lookup table
1875 __ lea(r11, ExternalAddress(StubRoutines::x86::base64_avx2_lut_addr()));
1876 __ movl(r15, isURL);
1877 __ shll(r15, 5);
1878 __ vmovdqu(xmm2, Address(r11, r15));
1879
1880 // Shuffle the offsets based on the range calculation done
1881 // above. This allows us to add the correct offset to the
1882 // 6-bit value corresponding to the range documented above.
1883 __ vpshufb(xmm1, xmm2, xmm1, Assembler::AVX_256bit);
1884 __ vpaddb(xmm0, xmm1, xmm0, Assembler::AVX_256bit);
1885
1886 // Store the encoded bytes
1887 __ vmovdqu(Address(dest, dp), xmm0);
1888 __ addl(dp, 32);
1889
1890 __ cmpl(length, 31);
1891 __ jcc(Assembler::belowEqual, L_process3);
1892
1893 __ align32();
1894 __ BIND(L_32byteLoop);
1895
1896 // Get next 32 bytes
1897 __ vmovdqu(xmm1, Address(source, start_offset, Address::times_1, -4));
1898
1899 __ subl(length, 24);
1900 __ addl(start_offset, 24);
1901
1902 // This logic is identical to the above, with only constant
1903 // register loads removed. Shuffle the input, mask off 6-bit
1904 // chunks, shift them into place, then add the offset to
1905 // encode.
1906 __ vpshufb(xmm1, xmm1, xmm9, Assembler::AVX_256bit);
1907
1908 __ vpand(xmm0, xmm8, xmm1, Assembler::AVX_256bit);
1909 __ vpmulhuw(xmm10, xmm0, xmm7, Assembler::AVX_256bit);
1910 __ vpand(xmm0, xmm6, xmm1, Assembler::AVX_256bit);
1911 __ vpmullw(xmm0, xmm5, xmm0, Assembler::AVX_256bit);
1912 __ vpor(xmm0, xmm0, xmm10, Assembler::AVX_256bit);
1913 __ vpcmpgtb(xmm10, xmm0, xmm3, Assembler::AVX_256bit);
1914 __ vpsubusb(xmm1, xmm0, xmm4, Assembler::AVX_256bit);
1915 __ vpsubb(xmm1, xmm1, xmm10, Assembler::AVX_256bit);
1916 __ vpshufb(xmm1, xmm2, xmm1, Assembler::AVX_256bit);
1917 __ vpaddb(xmm0, xmm1, xmm0, Assembler::AVX_256bit);
1918
1919 // Store the encoded bytes
1920 __ vmovdqu(Address(dest, dp), xmm0);
1921 __ addl(dp, 32);
1922
1923 __ cmpl(length, 31);
1924 __ jcc(Assembler::above, L_32byteLoop);
1925
1926 __ BIND(L_process3);
1927 __ vzeroupper();
1928 } else {
1929 __ BIND(L_process3);
1930 }
1931
1932 __ cmpl(length, 3);
1933 __ jcc(Assembler::below, L_exit);
1934
1935 // Load the encoding table based on isURL
1936 __ lea(r11, ExternalAddress(StubRoutines::x86::base64_encoding_table_addr()));
1937 __ movl(r15, isURL);
1938 __ shll(r15, 6);
1939 __ addptr(r11, r15);
1940
1941 __ BIND(L_processdata);
1942
1943 // Load 3 bytes
1944 __ load_unsigned_byte(r15, Address(source, start_offset));
1945 __ load_unsigned_byte(r10, Address(source, start_offset, Address::times_1, 1));
1946 __ load_unsigned_byte(r13, Address(source, start_offset, Address::times_1, 2));
1947
1948 // Build a 32-bit word with bytes 1, 2, 0, 1
1949 __ movl(rax, r10);
1950 __ shll(r10, 24);
1951 __ orl(rax, r10);
1952
1953 __ subl(length, 3);
1954
1955 __ shll(r15, 8);
1956 __ shll(r13, 16);
1957 __ orl(rax, r15);
1958
1959 __ addl(start_offset, 3);
1960
1961 __ orl(rax, r13);
1962 // At this point, rax contains | byte1 | byte2 | byte0 | byte1
1963 // r13 has byte2 << 16 - need low-order 6 bits to translate.
1964 // This translated byte is the fourth output byte.
1965 __ shrl(r13, 16);
1966 __ andl(r13, 0x3f);
1967
1968 // The high-order 6 bits of r15 (byte0) is translated.
1969 // The translated byte is the first output byte.
1970 __ shrl(r15, 10);
1971
1972 __ load_unsigned_byte(r13, Address(r11, r13));
1973 __ load_unsigned_byte(r15, Address(r11, r15));
1974
1975 __ movb(Address(dest, dp, Address::times_1, 3), r13);
1976
1977 // Extract high-order 4 bits of byte1 and low-order 2 bits of byte0.
1978 // This translated byte is the second output byte.
1979 __ shrl(rax, 4);
1980 __ movl(r10, rax);
1981 __ andl(rax, 0x3f);
1982
1983 __ movb(Address(dest, dp, Address::times_1, 0), r15);
1984
1985 __ load_unsigned_byte(rax, Address(r11, rax));
1986
1987 // Extract low-order 2 bits of byte1 and high-order 4 bits of byte2.
1988 // This translated byte is the third output byte.
1989 __ shrl(r10, 18);
1990 __ andl(r10, 0x3f);
1991
1992 __ load_unsigned_byte(r10, Address(r11, r10));
1993
1994 __ movb(Address(dest, dp, Address::times_1, 1), rax);
1995 __ movb(Address(dest, dp, Address::times_1, 2), r10);
1996
1997 __ addl(dp, 4);
1998 __ cmpl(length, 3);
1999 __ jcc(Assembler::aboveEqual, L_processdata);
2000
2001 __ BIND(L_exit);
2002 __ pop(r15);
2003 __ pop(r14);
2004 __ pop(r13);
2005 __ pop(r12);
2006 __ leave();
2007 __ ret(0);
2008
2009 return start;
2010 }
2011
2012 // base64 AVX512vbmi tables
2013 address StubGenerator::base64_vbmi_lookup_lo_addr() {
2014 __ align64();
2015 StubCodeMark mark(this, "StubRoutines", "lookup_lo_base64");
2016 address start = __ pc();
2017
2018 assert(((unsigned long long)start & 0x3f) == 0,
2019 "Alignment problem (0x%08llx)", (unsigned long long)start);
2020 __ emit_data64(0x8080808080808080, relocInfo::none);
2021 __ emit_data64(0x8080808080808080, relocInfo::none);
2022 __ emit_data64(0x8080808080808080, relocInfo::none);
2023 __ emit_data64(0x8080808080808080, relocInfo::none);
2024 __ emit_data64(0x8080808080808080, relocInfo::none);
2025 __ emit_data64(0x3f8080803e808080, relocInfo::none);
2026 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2027 __ emit_data64(0x8080808080803d3c, relocInfo::none);
2028
2029 return start;
2030 }
2031
2032 address StubGenerator::base64_vbmi_lookup_hi_addr() {
2033 __ align64();
2034 StubCodeMark mark(this, "StubRoutines", "lookup_hi_base64");
2035 address start = __ pc();
2036
2037 assert(((unsigned long long)start & 0x3f) == 0,
2038 "Alignment problem (0x%08llx)", (unsigned long long)start);
2039 __ emit_data64(0x0605040302010080, relocInfo::none);
2040 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2041 __ emit_data64(0x161514131211100f, relocInfo::none);
2042 __ emit_data64(0x8080808080191817, relocInfo::none);
2043 __ emit_data64(0x201f1e1d1c1b1a80, relocInfo::none);
2044 __ emit_data64(0x2827262524232221, relocInfo::none);
2045 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2046 __ emit_data64(0x8080808080333231, relocInfo::none);
2047
2048 return start;
2049 }
2050 address StubGenerator::base64_vbmi_lookup_lo_url_addr() {
2051 __ align64();
2052 StubCodeMark mark(this, "StubRoutines", "lookup_lo_base64url");
2053 address start = __ pc();
2054
2055 assert(((unsigned long long)start & 0x3f) == 0,
2056 "Alignment problem (0x%08llx)", (unsigned long long)start);
2057 __ emit_data64(0x8080808080808080, relocInfo::none);
2058 __ emit_data64(0x8080808080808080, relocInfo::none);
2059 __ emit_data64(0x8080808080808080, relocInfo::none);
2060 __ emit_data64(0x8080808080808080, relocInfo::none);
2061 __ emit_data64(0x8080808080808080, relocInfo::none);
2062 __ emit_data64(0x80803e8080808080, relocInfo::none);
2063 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2064 __ emit_data64(0x8080808080803d3c, relocInfo::none);
2065
2066 return start;
2067 }
2068
2069 address StubGenerator::base64_vbmi_lookup_hi_url_addr() {
2070 __ align64();
2071 StubCodeMark mark(this, "StubRoutines", "lookup_hi_base64url");
2072 address start = __ pc();
2073
2074 assert(((unsigned long long)start & 0x3f) == 0,
2075 "Alignment problem (0x%08llx)", (unsigned long long)start);
2076 __ emit_data64(0x0605040302010080, relocInfo::none);
2077 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2078 __ emit_data64(0x161514131211100f, relocInfo::none);
2079 __ emit_data64(0x3f80808080191817, relocInfo::none);
2080 __ emit_data64(0x201f1e1d1c1b1a80, relocInfo::none);
2081 __ emit_data64(0x2827262524232221, relocInfo::none);
2082 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2083 __ emit_data64(0x8080808080333231, relocInfo::none);
2084
2085 return start;
2086 }
2087
2088 address StubGenerator::base64_vbmi_pack_vec_addr() {
2089 __ align64();
2090 StubCodeMark mark(this, "StubRoutines", "pack_vec_base64");
2091 address start = __ pc();
2092
2093 assert(((unsigned long long)start & 0x3f) == 0,
2094 "Alignment problem (0x%08llx)", (unsigned long long)start);
2095 __ emit_data64(0x090a040506000102, relocInfo::none);
2096 __ emit_data64(0x161011120c0d0e08, relocInfo::none);
2097 __ emit_data64(0x1c1d1e18191a1415, relocInfo::none);
2098 __ emit_data64(0x292a242526202122, relocInfo::none);
2099 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2100 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2101 __ emit_data64(0x0000000000000000, relocInfo::none);
2102 __ emit_data64(0x0000000000000000, relocInfo::none);
2103
2104 return start;
2105 }
2106
2107 address StubGenerator::base64_vbmi_join_0_1_addr() {
2108 __ align64();
2109 StubCodeMark mark(this, "StubRoutines", "join_0_1_base64");
2110 address start = __ pc();
2111
2112 assert(((unsigned long long)start & 0x3f) == 0,
2113 "Alignment problem (0x%08llx)", (unsigned long long)start);
2114 __ emit_data64(0x090a040506000102, relocInfo::none);
2115 __ emit_data64(0x161011120c0d0e08, relocInfo::none);
2116 __ emit_data64(0x1c1d1e18191a1415, relocInfo::none);
2117 __ emit_data64(0x292a242526202122, relocInfo::none);
2118 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2119 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2120 __ emit_data64(0x494a444546404142, relocInfo::none);
2121 __ emit_data64(0x565051524c4d4e48, relocInfo::none);
2122
2123 return start;
2124 }
2125
2126 address StubGenerator::base64_vbmi_join_1_2_addr() {
2127 __ align64();
2128 StubCodeMark mark(this, "StubRoutines", "join_1_2_base64");
2129 address start = __ pc();
2130
2131 assert(((unsigned long long)start & 0x3f) == 0,
2132 "Alignment problem (0x%08llx)", (unsigned long long)start);
2133 __ emit_data64(0x1c1d1e18191a1415, relocInfo::none);
2134 __ emit_data64(0x292a242526202122, relocInfo::none);
2135 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2136 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2137 __ emit_data64(0x494a444546404142, relocInfo::none);
2138 __ emit_data64(0x565051524c4d4e48, relocInfo::none);
2139 __ emit_data64(0x5c5d5e58595a5455, relocInfo::none);
2140 __ emit_data64(0x696a646566606162, relocInfo::none);
2141
2142 return start;
2143 }
2144
2145 address StubGenerator::base64_vbmi_join_2_3_addr() {
2146 __ align64();
2147 StubCodeMark mark(this, "StubRoutines", "join_2_3_base64");
2148 address start = __ pc();
2149
2150 assert(((unsigned long long)start & 0x3f) == 0,
2151 "Alignment problem (0x%08llx)", (unsigned long long)start);
2152 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2153 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2154 __ emit_data64(0x494a444546404142, relocInfo::none);
2155 __ emit_data64(0x565051524c4d4e48, relocInfo::none);
2156 __ emit_data64(0x5c5d5e58595a5455, relocInfo::none);
2157 __ emit_data64(0x696a646566606162, relocInfo::none);
2158 __ emit_data64(0x767071726c6d6e68, relocInfo::none);
2159 __ emit_data64(0x7c7d7e78797a7475, relocInfo::none);
2160
2161 return start;
2162 }
2163
2164 address StubGenerator::base64_AVX2_decode_tables_addr() {
2165 __ align64();
2166 StubCodeMark mark(this, "StubRoutines", "AVX2_tables_base64");
2167 address start = __ pc();
2168
2169 assert(((unsigned long long)start & 0x3f) == 0,
2170 "Alignment problem (0x%08llx)", (unsigned long long)start);
2171 __ emit_data(0x2f2f2f2f, relocInfo::none, 0);
2172 __ emit_data(0x5f5f5f5f, relocInfo::none, 0); // for URL
2173
2174 __ emit_data(0xffffffff, relocInfo::none, 0);
2175 __ emit_data(0xfcfcfcfc, relocInfo::none, 0); // for URL
2176
2177 // Permute table
2178 __ emit_data64(0x0000000100000000, relocInfo::none);
2179 __ emit_data64(0x0000000400000002, relocInfo::none);
2180 __ emit_data64(0x0000000600000005, relocInfo::none);
2181 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2182
2183 // Shuffle table
2184 __ emit_data64(0x090a040506000102, relocInfo::none);
2185 __ emit_data64(0xffffffff0c0d0e08, relocInfo::none);
2186 __ emit_data64(0x090a040506000102, relocInfo::none);
2187 __ emit_data64(0xffffffff0c0d0e08, relocInfo::none);
2188
2189 // merge table
2190 __ emit_data(0x01400140, relocInfo::none, 0);
2191
2192 // merge multiplier
2193 __ emit_data(0x00011000, relocInfo::none, 0);
2194
2195 return start;
2196 }
2197
2198 address StubGenerator::base64_AVX2_decode_LUT_tables_addr() {
2199 __ align64();
2200 StubCodeMark mark(this, "StubRoutines", "AVX2_tables_URL_base64");
2201 address start = __ pc();
2202
2203 assert(((unsigned long long)start & 0x3f) == 0,
2204 "Alignment problem (0x%08llx)", (unsigned long long)start);
2205 // lut_lo
2206 __ emit_data64(0x1111111111111115, relocInfo::none);
2207 __ emit_data64(0x1a1b1b1b1a131111, relocInfo::none);
2208 __ emit_data64(0x1111111111111115, relocInfo::none);
2209 __ emit_data64(0x1a1b1b1b1a131111, relocInfo::none);
2210
2211 // lut_roll
2212 __ emit_data64(0xb9b9bfbf04131000, relocInfo::none);
2213 __ emit_data64(0x0000000000000000, relocInfo::none);
2214 __ emit_data64(0xb9b9bfbf04131000, relocInfo::none);
2215 __ emit_data64(0x0000000000000000, relocInfo::none);
2216
2217 // lut_lo URL
2218 __ emit_data64(0x1111111111111115, relocInfo::none);
2219 __ emit_data64(0x1b1b1a1b1b131111, relocInfo::none);
2220 __ emit_data64(0x1111111111111115, relocInfo::none);
2221 __ emit_data64(0x1b1b1a1b1b131111, relocInfo::none);
2222
2223 // lut_roll URL
2224 __ emit_data64(0xb9b9bfbf0411e000, relocInfo::none);
2225 __ emit_data64(0x0000000000000000, relocInfo::none);
2226 __ emit_data64(0xb9b9bfbf0411e000, relocInfo::none);
2227 __ emit_data64(0x0000000000000000, relocInfo::none);
2228
2229 // lut_hi
2230 __ emit_data64(0x0804080402011010, relocInfo::none);
2231 __ emit_data64(0x1010101010101010, relocInfo::none);
2232 __ emit_data64(0x0804080402011010, relocInfo::none);
2233 __ emit_data64(0x1010101010101010, relocInfo::none);
2234
2235 return start;
2236 }
2237
2238 address StubGenerator::base64_decoding_table_addr() {
2239 StubCodeMark mark(this, "StubRoutines", "decoding_table_base64");
2240 address start = __ pc();
2241
2242 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2243 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2244 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2245 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2246 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2247 __ emit_data64(0x3fffffff3effffff, relocInfo::none);
2248 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2249 __ emit_data64(0xffffffffffff3d3c, relocInfo::none);
2250 __ emit_data64(0x06050403020100ff, relocInfo::none);
2251 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2252 __ emit_data64(0x161514131211100f, relocInfo::none);
2253 __ emit_data64(0xffffffffff191817, relocInfo::none);
2254 __ emit_data64(0x201f1e1d1c1b1aff, relocInfo::none);
2255 __ emit_data64(0x2827262524232221, relocInfo::none);
2256 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2257 __ emit_data64(0xffffffffff333231, relocInfo::none);
2258 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2259 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2260 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2261 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2262 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2263 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2264 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2265 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2266 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2267 __ emit_data64(0xffffffffffffffff, 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
2275 // URL table
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(0xffff3effffffffff, relocInfo::none);
2282 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2283 __ emit_data64(0xffffffffffff3d3c, relocInfo::none);
2284 __ emit_data64(0x06050403020100ff, relocInfo::none);
2285 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2286 __ emit_data64(0x161514131211100f, relocInfo::none);
2287 __ emit_data64(0x3fffffffff191817, relocInfo::none);
2288 __ emit_data64(0x201f1e1d1c1b1aff, relocInfo::none);
2289 __ emit_data64(0x2827262524232221, relocInfo::none);
2290 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2291 __ emit_data64(0xffffffffff333231, relocInfo::none);
2292 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2293 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2294 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2295 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2296 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2297 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2298 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2299 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2300 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2301 __ emit_data64(0xffffffffffffffff, 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
2309 return start;
2310 }
2311
2312
2313 // Code for generating Base64 decoding.
2314 //
2315 // Based on the article (and associated code) from https://arxiv.org/abs/1910.05109.
2316 //
2317 // Intrinsic function prototype in Base64.java:
2318 // private void decodeBlock(byte[] src, int sp, int sl, byte[] dst, int dp, boolean isURL, isMIME) {
2319 address StubGenerator::generate_base64_decodeBlock() {
2320 __ align(CodeEntryAlignment);
2321 StubCodeMark mark(this, "StubRoutines", "implDecode");
2322 address start = __ pc();
2323
2324 __ enter();
2325
2326 // Save callee-saved registers before using them
2327 __ push(r12);
2328 __ push(r13);
2329 __ push(r14);
2330 __ push(r15);
2331 __ push(rbx);
2332
2333 // arguments
2334 const Register source = c_rarg0; // Source Array
2335 const Register start_offset = c_rarg1; // start offset
2336 const Register end_offset = c_rarg2; // end offset
2337 const Register dest = c_rarg3; // destination array
2338 const Register isMIME = rbx;
2339
2340 #ifndef _WIN64
2341 const Register dp = c_rarg4; // Position for writing to dest array
2342 const Register isURL = c_rarg5;// Base64 or URL character set
2343 __ movl(isMIME, Address(rbp, 2 * wordSize));
2344 #else
2345 const Address dp_mem(rbp, 6 * wordSize); // length is on stack on Win64
2346 const Address isURL_mem(rbp, 7 * wordSize);
2347 const Register isURL = r10; // pick the volatile windows register
2348 const Register dp = r12;
2349 __ movl(dp, dp_mem);
2350 __ movl(isURL, isURL_mem);
2351 __ movl(isMIME, Address(rbp, 8 * wordSize));
2352 #endif
2353
2354 const XMMRegister lookup_lo = xmm5;
2355 const XMMRegister lookup_hi = xmm6;
2356 const XMMRegister errorvec = xmm7;
2357 const XMMRegister pack16_op = xmm9;
2358 const XMMRegister pack32_op = xmm8;
2359 const XMMRegister input0 = xmm3;
2360 const XMMRegister input1 = xmm20;
2361 const XMMRegister input2 = xmm21;
2362 const XMMRegister input3 = xmm19;
2363 const XMMRegister join01 = xmm12;
2364 const XMMRegister join12 = xmm11;
2365 const XMMRegister join23 = xmm10;
2366 const XMMRegister translated0 = xmm2;
2367 const XMMRegister translated1 = xmm1;
2368 const XMMRegister translated2 = xmm0;
2369 const XMMRegister translated3 = xmm4;
2370
2371 const XMMRegister merged0 = xmm2;
2372 const XMMRegister merged1 = xmm1;
2373 const XMMRegister merged2 = xmm0;
2374 const XMMRegister merged3 = xmm4;
2375 const XMMRegister merge_ab_bc0 = xmm2;
2376 const XMMRegister merge_ab_bc1 = xmm1;
2377 const XMMRegister merge_ab_bc2 = xmm0;
2378 const XMMRegister merge_ab_bc3 = xmm4;
2379
2380 const XMMRegister pack24bits = xmm4;
2381
2382 const Register length = r14;
2383 const Register output_size = r13;
2384 const Register output_mask = r15;
2385 const KRegister input_mask = k1;
2386
2387 const XMMRegister input_initial_valid_b64 = xmm0;
2388 const XMMRegister tmp = xmm10;
2389 const XMMRegister mask = xmm0;
2390 const XMMRegister invalid_b64 = xmm1;
2391
2392 Label L_process256, L_process64, L_process64Loop, L_exit, L_processdata, L_loadURL;
2393 Label L_continue, L_finalBit, L_padding, L_donePadding, L_bruteForce;
2394 Label L_forceLoop, L_bottomLoop, L_checkMIME, L_exit_no_vzero, L_lastChunk;
2395
2396 // calculate length from offsets
2397 __ movl(length, end_offset);
2398 __ subl(length, start_offset);
2399 __ push(dest); // Save for return value calc
2400
2401 // If AVX512 VBMI not supported, just compile non-AVX code
2402 if(VM_Version::supports_avx512_vbmi() &&
2403 VM_Version::supports_avx512bw()) {
2404 __ cmpl(length, 31); // 32-bytes is break-even for AVX-512
2405 __ jcc(Assembler::lessEqual, L_lastChunk);
2406
2407 __ cmpl(isMIME, 0);
2408 __ jcc(Assembler::notEqual, L_lastChunk);
2409
2410 // Load lookup tables based on isURL
2411 __ cmpl(isURL, 0);
2412 __ jcc(Assembler::notZero, L_loadURL);
2413
2414 __ evmovdquq(lookup_lo, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_lo_addr()), Assembler::AVX_512bit, r13);
2415 __ evmovdquq(lookup_hi, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_hi_addr()), Assembler::AVX_512bit, r13);
2416
2417 __ BIND(L_continue);
2418
2419 __ movl(r15, 0x01400140);
2420 __ evpbroadcastd(pack16_op, r15, Assembler::AVX_512bit);
2421
2422 __ movl(r15, 0x00011000);
2423 __ evpbroadcastd(pack32_op, r15, Assembler::AVX_512bit);
2424
2425 __ cmpl(length, 0xff);
2426 __ jcc(Assembler::lessEqual, L_process64);
2427
2428 // load masks required for decoding data
2429 __ BIND(L_processdata);
2430 __ evmovdquq(join01, ExternalAddress(StubRoutines::x86::base64_vbmi_join_0_1_addr()), Assembler::AVX_512bit,r13);
2431 __ evmovdquq(join12, ExternalAddress(StubRoutines::x86::base64_vbmi_join_1_2_addr()), Assembler::AVX_512bit, r13);
2432 __ evmovdquq(join23, ExternalAddress(StubRoutines::x86::base64_vbmi_join_2_3_addr()), Assembler::AVX_512bit, r13);
2433
2434 __ align32();
2435 __ BIND(L_process256);
2436 // Grab input data
2437 __ evmovdquq(input0, Address(source, start_offset, Address::times_1, 0x00), Assembler::AVX_512bit);
2438 __ evmovdquq(input1, Address(source, start_offset, Address::times_1, 0x40), Assembler::AVX_512bit);
2439 __ evmovdquq(input2, Address(source, start_offset, Address::times_1, 0x80), Assembler::AVX_512bit);
2440 __ evmovdquq(input3, Address(source, start_offset, Address::times_1, 0xc0), Assembler::AVX_512bit);
2441
2442 // Copy the low part of the lookup table into the destination of the permutation
2443 __ evmovdquq(translated0, lookup_lo, Assembler::AVX_512bit);
2444 __ evmovdquq(translated1, lookup_lo, Assembler::AVX_512bit);
2445 __ evmovdquq(translated2, lookup_lo, Assembler::AVX_512bit);
2446 __ evmovdquq(translated3, lookup_lo, Assembler::AVX_512bit);
2447
2448 // Translate the base64 input into "decoded" bytes
2449 __ evpermt2b(translated0, input0, lookup_hi, Assembler::AVX_512bit);
2450 __ evpermt2b(translated1, input1, lookup_hi, Assembler::AVX_512bit);
2451 __ evpermt2b(translated2, input2, lookup_hi, Assembler::AVX_512bit);
2452 __ evpermt2b(translated3, input3, lookup_hi, Assembler::AVX_512bit);
2453
2454 // OR all of the translations together to check for errors (high-order bit of byte set)
2455 __ vpternlogd(input0, 0xfe, input1, input2, Assembler::AVX_512bit);
2456
2457 __ vpternlogd(input3, 0xfe, translated0, translated1, Assembler::AVX_512bit);
2458 __ vpternlogd(input0, 0xfe, translated2, translated3, Assembler::AVX_512bit);
2459 __ vpor(errorvec, input3, input0, Assembler::AVX_512bit);
2460
2461 // Check if there was an error - if so, try 64-byte chunks
2462 __ evpmovb2m(k3, errorvec, Assembler::AVX_512bit);
2463 __ kortestql(k3, k3);
2464 __ jcc(Assembler::notZero, L_process64);
2465
2466 // The merging and shuffling happens here
2467 // We multiply each byte pair [00dddddd | 00cccccc | 00bbbbbb | 00aaaaaa]
2468 // Multiply [00cccccc] by 2^6 added to [00dddddd] to get [0000cccc | ccdddddd]
2469 // The pack16_op is a vector of 0x01400140, so multiply D by 1 and C by 0x40
2470 __ vpmaddubsw(merge_ab_bc0, translated0, pack16_op, Assembler::AVX_512bit);
2471 __ vpmaddubsw(merge_ab_bc1, translated1, pack16_op, Assembler::AVX_512bit);
2472 __ vpmaddubsw(merge_ab_bc2, translated2, pack16_op, Assembler::AVX_512bit);
2473 __ vpmaddubsw(merge_ab_bc3, translated3, pack16_op, Assembler::AVX_512bit);
2474
2475 // Now do the same with packed 16-bit values.
2476 // We start with [0000cccc | ccdddddd | 0000aaaa | aabbbbbb]
2477 // pack32_op is 0x00011000 (2^12, 1), so this multiplies [0000aaaa | aabbbbbb] by 2^12
2478 // and adds [0000cccc | ccdddddd] to yield [00000000 | aaaaaabb | bbbbcccc | ccdddddd]
2479 __ vpmaddwd(merged0, merge_ab_bc0, pack32_op, Assembler::AVX_512bit);
2480 __ vpmaddwd(merged1, merge_ab_bc1, pack32_op, Assembler::AVX_512bit);
2481 __ vpmaddwd(merged2, merge_ab_bc2, pack32_op, Assembler::AVX_512bit);
2482 __ vpmaddwd(merged3, merge_ab_bc3, pack32_op, Assembler::AVX_512bit);
2483
2484 // The join vectors specify which byte from which vector goes into the outputs
2485 // One of every 4 bytes in the extended vector is zero, so we pack them into their
2486 // final positions in the register for storing (256 bytes in, 192 bytes out)
2487 __ evpermt2b(merged0, join01, merged1, Assembler::AVX_512bit);
2488 __ evpermt2b(merged1, join12, merged2, Assembler::AVX_512bit);
2489 __ evpermt2b(merged2, join23, merged3, Assembler::AVX_512bit);
2490
2491 // Store result
2492 __ evmovdquq(Address(dest, dp, Address::times_1, 0x00), merged0, Assembler::AVX_512bit);
2493 __ evmovdquq(Address(dest, dp, Address::times_1, 0x40), merged1, Assembler::AVX_512bit);
2494 __ evmovdquq(Address(dest, dp, Address::times_1, 0x80), merged2, Assembler::AVX_512bit);
2495
2496 __ addptr(source, 0x100);
2497 __ addptr(dest, 0xc0);
2498 __ subl(length, 0x100);
2499 __ cmpl(length, 64 * 4);
2500 __ jcc(Assembler::greaterEqual, L_process256);
2501
2502 // At this point, we've decoded 64 * 4 * n bytes.
2503 // The remaining length will be <= 64 * 4 - 1.
2504 // UNLESS there was an error decoding the first 256-byte chunk. In this
2505 // case, the length will be arbitrarily long.
2506 //
2507 // Note that this will be the path for MIME-encoded strings.
2508
2509 __ BIND(L_process64);
2510
2511 __ evmovdquq(pack24bits, ExternalAddress(StubRoutines::x86::base64_vbmi_pack_vec_addr()), Assembler::AVX_512bit, r13);
2512
2513 __ cmpl(length, 63);
2514 __ jcc(Assembler::lessEqual, L_finalBit);
2515
2516 __ mov64(rax, 0x0000ffffffffffff);
2517 __ kmovql(k2, rax);
2518
2519 __ align32();
2520 __ BIND(L_process64Loop);
2521
2522 // Handle first 64-byte block
2523
2524 __ evmovdquq(input0, Address(source, start_offset), Assembler::AVX_512bit);
2525 __ evmovdquq(translated0, lookup_lo, Assembler::AVX_512bit);
2526 __ evpermt2b(translated0, input0, lookup_hi, Assembler::AVX_512bit);
2527
2528 __ vpor(errorvec, translated0, input0, Assembler::AVX_512bit);
2529
2530 // Check for error and bomb out before updating dest
2531 __ evpmovb2m(k3, errorvec, Assembler::AVX_512bit);
2532 __ kortestql(k3, k3);
2533 __ jcc(Assembler::notZero, L_exit);
2534
2535 // Pack output register, selecting correct byte ordering
2536 __ vpmaddubsw(merge_ab_bc0, translated0, pack16_op, Assembler::AVX_512bit);
2537 __ vpmaddwd(merged0, merge_ab_bc0, pack32_op, Assembler::AVX_512bit);
2538 __ vpermb(merged0, pack24bits, merged0, Assembler::AVX_512bit);
2539
2540 __ evmovdqub(Address(dest, dp), k2, merged0, true, Assembler::AVX_512bit);
2541
2542 __ subl(length, 64);
2543 __ addptr(source, 64);
2544 __ addptr(dest, 48);
2545
2546 __ cmpl(length, 64);
2547 __ jcc(Assembler::greaterEqual, L_process64Loop);
2548
2549 __ cmpl(length, 0);
2550 __ jcc(Assembler::lessEqual, L_exit);
2551
2552 __ BIND(L_finalBit);
2553 // Now have 1 to 63 bytes left to decode
2554
2555 // I was going to let Java take care of the final fragment
2556 // however it will repeatedly call this routine for every 4 bytes
2557 // of input data, so handle the rest here.
2558 __ movq(rax, -1);
2559 __ bzhiq(rax, rax, length); // Input mask in rax
2560
2561 __ movl(output_size, length);
2562 __ shrl(output_size, 2); // Find (len / 4) * 3 (output length)
2563 __ lea(output_size, Address(output_size, output_size, Address::times_2, 0));
2564 // output_size in r13
2565
2566 // Strip pad characters, if any, and adjust length and mask
2567 __ cmpb(Address(source, length, Address::times_1, -1), '=');
2568 __ jcc(Assembler::equal, L_padding);
2569
2570 __ BIND(L_donePadding);
2571
2572 // Output size is (64 - output_size), output mask is (all 1s >> output_size).
2573 __ kmovql(input_mask, rax);
2574 __ movq(output_mask, -1);
2575 __ bzhiq(output_mask, output_mask, output_size);
2576
2577 // Load initial input with all valid base64 characters. Will be used
2578 // in merging source bytes to avoid masking when determining if an error occurred.
2579 __ movl(rax, 0x61616161);
2580 __ evpbroadcastd(input_initial_valid_b64, rax, Assembler::AVX_512bit);
2581
2582 // A register containing all invalid base64 decoded values
2583 __ movl(rax, 0x80808080);
2584 __ evpbroadcastd(invalid_b64, rax, Assembler::AVX_512bit);
2585
2586 // input_mask is in k1
2587 // output_size is in r13
2588 // output_mask is in r15
2589 // zmm0 - free
2590 // zmm1 - 0x00011000
2591 // zmm2 - 0x01400140
2592 // zmm3 - errorvec
2593 // zmm4 - pack vector
2594 // zmm5 - lookup_lo
2595 // zmm6 - lookup_hi
2596 // zmm7 - errorvec
2597 // zmm8 - 0x61616161
2598 // zmm9 - 0x80808080
2599
2600 // Load only the bytes from source, merging into our "fully-valid" register
2601 __ evmovdqub(input_initial_valid_b64, input_mask, Address(source, start_offset, Address::times_1, 0x0), true, Assembler::AVX_512bit);
2602
2603 // Decode all bytes within our merged input
2604 __ evmovdquq(tmp, lookup_lo, Assembler::AVX_512bit);
2605 __ evpermt2b(tmp, input_initial_valid_b64, lookup_hi, Assembler::AVX_512bit);
2606 __ evporq(mask, tmp, input_initial_valid_b64, Assembler::AVX_512bit);
2607
2608 // Check for error. Compare (decoded | initial) to all invalid.
2609 // If any bytes have their high-order bit set, then we have an error.
2610 __ evptestmb(k2, mask, invalid_b64, Assembler::AVX_512bit);
2611 __ kortestql(k2, k2);
2612
2613 // If we have an error, use the brute force loop to decode what we can (4-byte chunks).
2614 __ jcc(Assembler::notZero, L_bruteForce);
2615
2616 // Shuffle output bytes
2617 __ vpmaddubsw(tmp, tmp, pack16_op, Assembler::AVX_512bit);
2618 __ vpmaddwd(tmp, tmp, pack32_op, Assembler::AVX_512bit);
2619
2620 __ vpermb(tmp, pack24bits, tmp, Assembler::AVX_512bit);
2621 __ kmovql(k1, output_mask);
2622 __ evmovdqub(Address(dest, dp), k1, tmp, true, Assembler::AVX_512bit);
2623
2624 __ addptr(dest, output_size);
2625
2626 __ BIND(L_exit);
2627 __ vzeroupper();
2628 __ pop(rax); // Get original dest value
2629 __ subptr(dest, rax); // Number of bytes converted
2630 __ movptr(rax, dest);
2631 __ pop(rbx);
2632 __ pop(r15);
2633 __ pop(r14);
2634 __ pop(r13);
2635 __ pop(r12);
2636 __ leave();
2637 __ ret(0);
2638
2639 __ BIND(L_loadURL);
2640 __ evmovdquq(lookup_lo, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_lo_url_addr()), Assembler::AVX_512bit, r13);
2641 __ evmovdquq(lookup_hi, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_hi_url_addr()), Assembler::AVX_512bit, r13);
2642 __ jmp(L_continue);
2643
2644 __ BIND(L_padding);
2645 __ decrementq(output_size, 1);
2646 __ shrq(rax, 1);
2647
2648 __ cmpb(Address(source, length, Address::times_1, -2), '=');
2649 __ jcc(Assembler::notEqual, L_donePadding);
2650
2651 __ decrementq(output_size, 1);
2652 __ shrq(rax, 1);
2653 __ jmp(L_donePadding);
2654
2655 __ align32();
2656 __ BIND(L_bruteForce);
2657 } // End of if(avx512_vbmi)
2658
2659 if (VM_Version::supports_avx2()) {
2660 Label L_tailProc, L_topLoop, L_enterLoop;
2661
2662 __ cmpl(isMIME, 0);
2663 __ jcc(Assembler::notEqual, L_lastChunk);
2664
2665 // Check for buffer too small (for algorithm)
2666 __ subl(length, 0x2c);
2667 __ jcc(Assembler::less, L_tailProc);
2668
2669 __ shll(isURL, 2);
2670
2671 // Algorithm adapted from https://arxiv.org/abs/1704.00605, "Faster Base64
2672 // Encoding and Decoding using AVX2 Instructions". URL modifications added.
2673
2674 // Set up constants
2675 __ lea(r13, ExternalAddress(StubRoutines::x86::base64_AVX2_decode_tables_addr()));
2676 __ vpbroadcastd(xmm4, Address(r13, isURL, Address::times_1), Assembler::AVX_256bit); // 2F or 5F
2677 __ vpbroadcastd(xmm10, Address(r13, isURL, Address::times_1, 0x08), Assembler::AVX_256bit); // -1 or -4
2678 __ vmovdqu(xmm12, Address(r13, 0x10)); // permute
2679 __ vmovdqu(xmm13, Address(r13, 0x30)); // shuffle
2680 __ vpbroadcastd(xmm7, Address(r13, 0x50), Assembler::AVX_256bit); // merge
2681 __ vpbroadcastd(xmm6, Address(r13, 0x54), Assembler::AVX_256bit); // merge mult
2682
2683 __ lea(r13, ExternalAddress(StubRoutines::x86::base64_AVX2_decode_LUT_tables_addr()));
2684 __ shll(isURL, 4);
2685 __ vmovdqu(xmm11, Address(r13, isURL, Address::times_1, 0x00)); // lut_lo
2686 __ vmovdqu(xmm8, Address(r13, isURL, Address::times_1, 0x20)); // lut_roll
2687 __ shrl(isURL, 6); // restore isURL
2688 __ vmovdqu(xmm9, Address(r13, 0x80)); // lut_hi
2689 __ jmp(L_enterLoop);
2690
2691 __ align32();
2692 __ bind(L_topLoop);
2693 // Add in the offset value (roll) to get 6-bit out values
2694 __ vpaddb(xmm0, xmm0, xmm2, Assembler::AVX_256bit);
2695 // Merge and permute the output bits into appropriate output byte lanes
2696 __ vpmaddubsw(xmm0, xmm0, xmm7, Assembler::AVX_256bit);
2697 __ vpmaddwd(xmm0, xmm0, xmm6, Assembler::AVX_256bit);
2698 __ vpshufb(xmm0, xmm0, xmm13, Assembler::AVX_256bit);
2699 __ vpermd(xmm0, xmm12, xmm0, Assembler::AVX_256bit);
2700 // Store the output bytes
2701 __ vmovdqu(Address(dest, dp, Address::times_1, 0), xmm0);
2702 __ addptr(source, 0x20);
2703 __ addptr(dest, 0x18);
2704 __ subl(length, 0x20);
2705 __ jcc(Assembler::less, L_tailProc);
2706
2707 __ bind(L_enterLoop);
2708
2709 // Load in encoded string (32 bytes)
2710 __ vmovdqu(xmm2, Address(source, start_offset, Address::times_1, 0x0));
2711 // Extract the high nibble for indexing into the lut tables. High 4 bits are don't care.
2712 __ vpsrld(xmm1, xmm2, 0x4, Assembler::AVX_256bit);
2713 __ vpand(xmm1, xmm4, xmm1, Assembler::AVX_256bit);
2714 // Extract the low nibble. 5F/2F will isolate the low-order 4 bits. High 4 bits are don't care.
2715 __ vpand(xmm3, xmm2, xmm4, Assembler::AVX_256bit);
2716 // Check for special-case (0x2F or 0x5F (URL))
2717 __ vpcmpeqb(xmm0, xmm4, xmm2, Assembler::AVX_256bit);
2718 // Get the bitset based on the low nibble. vpshufb uses low-order 4 bits only.
2719 __ vpshufb(xmm3, xmm11, xmm3, Assembler::AVX_256bit);
2720 // Get the bit value of the high nibble
2721 __ vpshufb(xmm5, xmm9, xmm1, Assembler::AVX_256bit);
2722 // Make sure 2F / 5F shows as valid
2723 __ vpandn(xmm3, xmm0, xmm3, Assembler::AVX_256bit);
2724 // Make adjustment for roll index. For non-URL, this is a no-op,
2725 // for URL, this adjusts by -4. This is to properly index the
2726 // roll value for 2F / 5F.
2727 __ vpand(xmm0, xmm0, xmm10, Assembler::AVX_256bit);
2728 // If the and of the two is non-zero, we have an invalid input character
2729 __ vptest(xmm3, xmm5);
2730 // Extract the "roll" value - value to add to the input to get 6-bit out value
2731 __ vpaddb(xmm0, xmm0, xmm1, Assembler::AVX_256bit); // Handle 2F / 5F
2732 __ vpshufb(xmm0, xmm8, xmm0, Assembler::AVX_256bit);
2733 __ jcc(Assembler::equal, L_topLoop); // Fall through on error
2734
2735 __ bind(L_tailProc);
2736
2737 __ addl(length, 0x2c);
2738
2739 __ vzeroupper();
2740 }
2741
2742 // Use non-AVX code to decode 4-byte chunks into 3 bytes of output
2743
2744 // Register state (Linux):
2745 // r12-15 - saved on stack
2746 // rdi - src
2747 // rsi - sp
2748 // rdx - sl
2749 // rcx - dst
2750 // r8 - dp
2751 // r9 - isURL
2752
2753 // Register state (Windows):
2754 // r12-15 - saved on stack
2755 // rcx - src
2756 // rdx - sp
2757 // r8 - sl
2758 // r9 - dst
2759 // r12 - dp
2760 // r10 - isURL
2761
2762 // Registers (common):
2763 // length (r14) - bytes in src
2764
2765 const Register decode_table = r11;
2766 const Register out_byte_count = rbx;
2767 const Register byte1 = r13;
2768 const Register byte2 = r15;
2769 const Register byte3 = WIN64_ONLY(r8) NOT_WIN64(rdx);
2770 const Register byte4 = WIN64_ONLY(r10) NOT_WIN64(r9);
2771
2772 __ bind(L_lastChunk);
2773
2774 __ shrl(length, 2); // Multiple of 4 bytes only - length is # 4-byte chunks
2775 __ cmpl(length, 0);
2776 __ jcc(Assembler::lessEqual, L_exit_no_vzero);
2777
2778 __ shll(isURL, 8); // index into decode table based on isURL
2779 __ lea(decode_table, ExternalAddress(StubRoutines::x86::base64_decoding_table_addr()));
2780 __ addptr(decode_table, isURL);
2781
2782 __ jmp(L_bottomLoop);
2783
2784 __ align32();
2785 __ BIND(L_forceLoop);
2786 __ shll(byte1, 18);
2787 __ shll(byte2, 12);
2788 __ shll(byte3, 6);
2789 __ orl(byte1, byte2);
2790 __ orl(byte1, byte3);
2791 __ orl(byte1, byte4);
2792
2793 __ addptr(source, 4);
2794
2795 __ movb(Address(dest, dp, Address::times_1, 2), byte1);
2796 __ shrl(byte1, 8);
2797 __ movb(Address(dest, dp, Address::times_1, 1), byte1);
2798 __ shrl(byte1, 8);
2799 __ movb(Address(dest, dp, Address::times_1, 0), byte1);
2800
2801 __ addptr(dest, 3);
2802 __ decrementl(length, 1);
2803 __ jcc(Assembler::zero, L_exit_no_vzero);
2804
2805 __ BIND(L_bottomLoop);
2806 __ load_unsigned_byte(byte1, Address(source, start_offset, Address::times_1, 0x00));
2807 __ load_unsigned_byte(byte2, Address(source, start_offset, Address::times_1, 0x01));
2808 __ load_signed_byte(byte1, Address(decode_table, byte1));
2809 __ load_signed_byte(byte2, Address(decode_table, byte2));
2810 __ load_unsigned_byte(byte3, Address(source, start_offset, Address::times_1, 0x02));
2811 __ load_unsigned_byte(byte4, Address(source, start_offset, Address::times_1, 0x03));
2812 __ load_signed_byte(byte3, Address(decode_table, byte3));
2813 __ load_signed_byte(byte4, Address(decode_table, byte4));
2814
2815 __ mov(rax, byte1);
2816 __ orl(rax, byte2);
2817 __ orl(rax, byte3);
2818 __ orl(rax, byte4);
2819 __ jcc(Assembler::positive, L_forceLoop);
2820
2821 __ BIND(L_exit_no_vzero);
2822 __ pop(rax); // Get original dest value
2823 __ subptr(dest, rax); // Number of bytes converted
2824 __ movptr(rax, dest);
2825 __ pop(rbx);
2826 __ pop(r15);
2827 __ pop(r14);
2828 __ pop(r13);
2829 __ pop(r12);
2830 __ leave();
2831 __ ret(0);
2832
2833 return start;
2834 }
2835
2836
2837 /**
2838 * Arguments:
2839 *
2840 * Inputs:
2841 * c_rarg0 - int crc
2842 * c_rarg1 - byte* buf
2843 * c_rarg2 - int length
2844 *
2845 * Output:
2846 * rax - int crc result
2847 */
2848 address StubGenerator::generate_updateBytesCRC32() {
2849 assert(UseCRC32Intrinsics, "need AVX and CLMUL instructions");
2850
2851 __ align(CodeEntryAlignment);
2852 StubCodeMark mark(this, "StubRoutines", "updateBytesCRC32");
2853
2854 address start = __ pc();
2855
2856 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
2857 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
2858 // rscratch1: r10
2859 const Register crc = c_rarg0; // crc
2860 const Register buf = c_rarg1; // source java byte array address
2861 const Register len = c_rarg2; // length
2862 const Register table = c_rarg3; // crc_table address (reuse register)
2863 const Register tmp1 = r11;
2864 const Register tmp2 = r10;
2865 assert_different_registers(crc, buf, len, table, tmp1, tmp2, rax);
2866
2867 BLOCK_COMMENT("Entry:");
2868 __ enter(); // required for proper stackwalking of RuntimeStub frame
2869
2870 if (VM_Version::supports_sse4_1() && VM_Version::supports_avx512_vpclmulqdq() &&
2871 VM_Version::supports_avx512bw() &&
2872 VM_Version::supports_avx512vl()) {
2873 // The constants used in the CRC32 algorithm requires the 1's compliment of the initial crc value.
2874 // However, the constant table for CRC32-C assumes the original crc value. Account for this
2875 // difference before calling and after returning.
2876 __ lea(table, ExternalAddress(StubRoutines::x86::crc_table_avx512_addr()));
2877 __ notl(crc);
2878 __ kernel_crc32_avx512(crc, buf, len, table, tmp1, tmp2);
2879 __ notl(crc);
2880 } else {
2881 __ kernel_crc32(crc, buf, len, table, tmp1);
2882 }
2883
2884 __ movl(rax, crc);
2885 __ vzeroupper();
2886 __ leave(); // required for proper stackwalking of RuntimeStub frame
2887 __ ret(0);
2888
2889 return start;
2890 }
2891
2892 /**
2893 * Arguments:
2894 *
2895 * Inputs:
2896 * c_rarg0 - int crc
2897 * c_rarg1 - byte* buf
2898 * c_rarg2 - long length
2899 * c_rarg3 - table_start - optional (present only when doing a library_call,
2900 * not used by x86 algorithm)
2901 *
2902 * Output:
2903 * rax - int crc result
2904 */
2905 address StubGenerator::generate_updateBytesCRC32C(bool is_pclmulqdq_supported) {
2906 assert(UseCRC32CIntrinsics, "need SSE4_2");
2907 __ align(CodeEntryAlignment);
2908 StubCodeMark mark(this, "StubRoutines", "updateBytesCRC32C");
2909 address start = __ pc();
2910
2911 //reg.arg int#0 int#1 int#2 int#3 int#4 int#5 float regs
2912 //Windows RCX RDX R8 R9 none none XMM0..XMM3
2913 //Lin / Sol RDI RSI RDX RCX R8 R9 XMM0..XMM7
2914 const Register crc = c_rarg0; // crc
2915 const Register buf = c_rarg1; // source java byte array address
2916 const Register len = c_rarg2; // length
2917 const Register a = rax;
2918 const Register j = r9;
2919 const Register k = r10;
2920 const Register l = r11;
2921 #ifdef _WIN64
2922 const Register y = rdi;
2923 const Register z = rsi;
2924 #else
2925 const Register y = rcx;
2926 const Register z = r8;
2927 #endif
2928 assert_different_registers(crc, buf, len, a, j, k, l, y, z);
2929
2930 BLOCK_COMMENT("Entry:");
2931 __ enter(); // required for proper stackwalking of RuntimeStub frame
2932 Label L_continue;
2933
2934 if (VM_Version::supports_sse4_1() && VM_Version::supports_avx512_vpclmulqdq() &&
2935 VM_Version::supports_avx512bw() &&
2936 VM_Version::supports_avx512vl()) {
2937 Label L_doSmall;
2938
2939 __ cmpl(len, 384);
2940 __ jcc(Assembler::lessEqual, L_doSmall);
2941
2942 __ lea(j, ExternalAddress(StubRoutines::x86::crc32c_table_avx512_addr()));
2943 __ kernel_crc32_avx512(crc, buf, len, j, l, k);
2944
2945 __ jmp(L_continue);
2946
2947 __ bind(L_doSmall);
2948 }
2949 #ifdef _WIN64
2950 __ push(y);
2951 __ push(z);
2952 #endif
2953 __ crc32c_ipl_alg2_alt2(crc, buf, len,
2954 a, j, k,
2955 l, y, z,
2956 c_farg0, c_farg1, c_farg2,
2957 is_pclmulqdq_supported);
2958 #ifdef _WIN64
2959 __ pop(z);
2960 __ pop(y);
2961 #endif
2962
2963 __ bind(L_continue);
2964 __ movl(rax, crc);
2965 __ vzeroupper();
2966 __ leave(); // required for proper stackwalking of RuntimeStub frame
2967 __ ret(0);
2968
2969 return start;
2970 }
2971
2972
2973 /**
2974 * Arguments:
2975 *
2976 * Input:
2977 * c_rarg0 - x address
2978 * c_rarg1 - x length
2979 * c_rarg2 - y address
2980 * c_rarg3 - y length
2981 * not Win64
2982 * c_rarg4 - z address
2983 * c_rarg5 - z length
2984 * Win64
2985 * rsp+40 - z address
2986 * rsp+48 - z length
2987 */
2988 address StubGenerator::generate_multiplyToLen() {
2989 __ align(CodeEntryAlignment);
2990 StubCodeMark mark(this, "StubRoutines", "multiplyToLen");
2991 address start = __ pc();
2992
2993 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
2994 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
2995 const Register x = rdi;
2996 const Register xlen = rax;
2997 const Register y = rsi;
2998 const Register ylen = rcx;
2999 const Register z = r8;
3000 const Register zlen = r11;
3001
3002 // Next registers will be saved on stack in multiply_to_len().
3003 const Register tmp1 = r12;
3004 const Register tmp2 = r13;
3005 const Register tmp3 = r14;
3006 const Register tmp4 = r15;
3007 const Register tmp5 = rbx;
3008
3009 BLOCK_COMMENT("Entry:");
3010 __ enter(); // required for proper stackwalking of RuntimeStub frame
3011
3012 #ifndef _WIN64
3013 __ movptr(zlen, r9); // Save r9 in r11 - zlen
3014 #endif
3015 setup_arg_regs(4); // x => rdi, xlen => rsi, y => rdx
3016 // ylen => rcx, z => r8, zlen => r11
3017 // r9 and r10 may be used to save non-volatile registers
3018 #ifdef _WIN64
3019 // last 2 arguments (#4, #5) are on stack on Win64
3020 __ movptr(z, Address(rsp, 6 * wordSize));
3021 __ movptr(zlen, Address(rsp, 7 * wordSize));
3022 #endif
3023
3024 __ movptr(xlen, rsi);
3025 __ movptr(y, rdx);
3026 __ multiply_to_len(x, xlen, y, ylen, z, zlen, tmp1, tmp2, tmp3, tmp4, tmp5);
3027
3028 restore_arg_regs();
3029
3030 __ leave(); // required for proper stackwalking of RuntimeStub frame
3031 __ ret(0);
3032
3033 return start;
3034 }
3035
3036 /**
3037 * Arguments:
3038 *
3039 * Input:
3040 * c_rarg0 - obja address
3041 * c_rarg1 - objb address
3042 * c_rarg3 - length length
3043 * c_rarg4 - scale log2_array_indxscale
3044 *
3045 * Output:
3046 * rax - int >= mismatched index, < 0 bitwise complement of tail
3047 */
3048 address StubGenerator::generate_vectorizedMismatch() {
3049 __ align(CodeEntryAlignment);
3050 StubCodeMark mark(this, "StubRoutines", "vectorizedMismatch");
3051 address start = __ pc();
3052
3053 BLOCK_COMMENT("Entry:");
3054 __ enter();
3055
3056 #ifdef _WIN64 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
3057 const Register scale = c_rarg0; //rcx, will exchange with r9
3058 const Register objb = c_rarg1; //rdx
3059 const Register length = c_rarg2; //r8
3060 const Register obja = c_rarg3; //r9
3061 __ xchgq(obja, scale); //now obja and scale contains the correct contents
3062
3063 const Register tmp1 = r10;
3064 const Register tmp2 = r11;
3065 #endif
3066 #ifndef _WIN64 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
3067 const Register obja = c_rarg0; //U:rdi
3068 const Register objb = c_rarg1; //U:rsi
3069 const Register length = c_rarg2; //U:rdx
3070 const Register scale = c_rarg3; //U:rcx
3071 const Register tmp1 = r8;
3072 const Register tmp2 = r9;
3073 #endif
3074 const Register result = rax; //return value
3075 const XMMRegister vec0 = xmm0;
3076 const XMMRegister vec1 = xmm1;
3077 const XMMRegister vec2 = xmm2;
3078
3079 __ vectorized_mismatch(obja, objb, length, scale, result, tmp1, tmp2, vec0, vec1, vec2);
3080
3081 __ vzeroupper();
3082 __ leave();
3083 __ ret(0);
3084
3085 return start;
3086 }
3087
3088 /**
3089 * Arguments:
3090 *
3091 // Input:
3092 // c_rarg0 - x address
3093 // c_rarg1 - x length
3094 // c_rarg2 - z address
3095 // c_rarg3 - z length
3096 *
3097 */
3098 address StubGenerator::generate_squareToLen() {
3099
3100 __ align(CodeEntryAlignment);
3101 StubCodeMark mark(this, "StubRoutines", "squareToLen");
3102 address start = __ pc();
3103
3104 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
3105 // Unix: rdi, rsi, rdx, rcx (c_rarg0, c_rarg1, ...)
3106 const Register x = rdi;
3107 const Register len = rsi;
3108 const Register z = r8;
3109 const Register zlen = rcx;
3110
3111 const Register tmp1 = r12;
3112 const Register tmp2 = r13;
3113 const Register tmp3 = r14;
3114 const Register tmp4 = r15;
3115 const Register tmp5 = rbx;
3116
3117 BLOCK_COMMENT("Entry:");
3118 __ enter(); // required for proper stackwalking of RuntimeStub frame
3119
3120 setup_arg_regs(4); // x => rdi, len => rsi, z => rdx
3121 // zlen => rcx
3122 // r9 and r10 may be used to save non-volatile registers
3123 __ movptr(r8, rdx);
3124 __ square_to_len(x, len, z, zlen, tmp1, tmp2, tmp3, tmp4, tmp5, rdx, rax);
3125
3126 restore_arg_regs();
3127
3128 __ leave(); // required for proper stackwalking of RuntimeStub frame
3129 __ ret(0);
3130
3131 return start;
3132 }
3133
3134 address StubGenerator::generate_method_entry_barrier() {
3135 __ align(CodeEntryAlignment);
3136 StubCodeMark mark(this, "StubRoutines", "nmethod_entry_barrier");
3137 address start = __ pc();
3138
3139 Label deoptimize_label;
3140
3141 __ push(-1); // cookie, this is used for writing the new rsp when deoptimizing
3142
3143 BLOCK_COMMENT("Entry:");
3144 __ enter(); // save rbp
3145
3146 // save c_rarg0, because we want to use that value.
3147 // We could do without it but then we depend on the number of slots used by pusha
3148 __ push(c_rarg0);
3149
3150 __ lea(c_rarg0, Address(rsp, wordSize * 3)); // 1 for cookie, 1 for rbp, 1 for c_rarg0 - this should be the return address
3151
3152 __ pusha();
3153
3154 // The method may have floats as arguments, and we must spill them before calling
3155 // the VM runtime.
3156 assert(Argument::n_float_register_parameters_j == 8, "Assumption");
3157 const int xmm_size = wordSize * 2;
3158 const int xmm_spill_size = xmm_size * Argument::n_float_register_parameters_j;
3159 __ subptr(rsp, xmm_spill_size);
3160 __ movdqu(Address(rsp, xmm_size * 7), xmm7);
3161 __ movdqu(Address(rsp, xmm_size * 6), xmm6);
3162 __ movdqu(Address(rsp, xmm_size * 5), xmm5);
3163 __ movdqu(Address(rsp, xmm_size * 4), xmm4);
3164 __ movdqu(Address(rsp, xmm_size * 3), xmm3);
3165 __ movdqu(Address(rsp, xmm_size * 2), xmm2);
3166 __ movdqu(Address(rsp, xmm_size * 1), xmm1);
3167 __ movdqu(Address(rsp, xmm_size * 0), xmm0);
3168
3169 __ call_VM_leaf(CAST_FROM_FN_PTR(address, static_cast<int (*)(address*)>(BarrierSetNMethod::nmethod_stub_entry_barrier)), 1);
3170
3171 __ movdqu(xmm0, Address(rsp, xmm_size * 0));
3172 __ movdqu(xmm1, Address(rsp, xmm_size * 1));
3173 __ movdqu(xmm2, Address(rsp, xmm_size * 2));
3174 __ movdqu(xmm3, Address(rsp, xmm_size * 3));
3175 __ movdqu(xmm4, Address(rsp, xmm_size * 4));
3176 __ movdqu(xmm5, Address(rsp, xmm_size * 5));
3177 __ movdqu(xmm6, Address(rsp, xmm_size * 6));
3178 __ movdqu(xmm7, Address(rsp, xmm_size * 7));
3179 __ addptr(rsp, xmm_spill_size);
3180
3181 __ cmpl(rax, 1); // 1 means deoptimize
3182 __ jcc(Assembler::equal, deoptimize_label);
3183
3184 __ popa();
3185 __ pop(c_rarg0);
3186
3187 __ leave();
3188
3189 __ addptr(rsp, 1 * wordSize); // cookie
3190 __ ret(0);
3191
3192
3193 __ BIND(deoptimize_label);
3194
3195 __ popa();
3196 __ pop(c_rarg0);
3197
3198 __ leave();
3199
3200 // this can be taken out, but is good for verification purposes. getting a SIGSEGV
3201 // here while still having a correct stack is valuable
3202 __ testptr(rsp, Address(rsp, 0));
3203
3204 __ movptr(rsp, Address(rsp, 0)); // new rsp was written in the barrier
3205 __ jmp(Address(rsp, -1 * wordSize)); // jmp target should be callers verified_entry_point
3206
3207 return start;
3208 }
3209
3210 /**
3211 * Arguments:
3212 *
3213 * Input:
3214 * c_rarg0 - out address
3215 * c_rarg1 - in address
3216 * c_rarg2 - offset
3217 * c_rarg3 - len
3218 * not Win64
3219 * c_rarg4 - k
3220 * Win64
3221 * rsp+40 - k
3222 */
3223 address StubGenerator::generate_mulAdd() {
3224 __ align(CodeEntryAlignment);
3225 StubCodeMark mark(this, "StubRoutines", "mulAdd");
3226 address start = __ pc();
3227
3228 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
3229 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
3230 const Register out = rdi;
3231 const Register in = rsi;
3232 const Register offset = r11;
3233 const Register len = rcx;
3234 const Register k = r8;
3235
3236 // Next registers will be saved on stack in mul_add().
3237 const Register tmp1 = r12;
3238 const Register tmp2 = r13;
3239 const Register tmp3 = r14;
3240 const Register tmp4 = r15;
3241 const Register tmp5 = rbx;
3242
3243 BLOCK_COMMENT("Entry:");
3244 __ enter(); // required for proper stackwalking of RuntimeStub frame
3245
3246 setup_arg_regs(4); // out => rdi, in => rsi, offset => rdx
3247 // len => rcx, k => r8
3248 // r9 and r10 may be used to save non-volatile registers
3249 #ifdef _WIN64
3250 // last argument is on stack on Win64
3251 __ movl(k, Address(rsp, 6 * wordSize));
3252 #endif
3253 __ movptr(r11, rdx); // move offset in rdx to offset(r11)
3254 __ mul_add(out, in, offset, len, k, tmp1, tmp2, tmp3, tmp4, tmp5, rdx, rax);
3255
3256 restore_arg_regs();
3257
3258 __ leave(); // required for proper stackwalking of RuntimeStub frame
3259 __ ret(0);
3260
3261 return start;
3262 }
3263
3264 address StubGenerator::generate_bigIntegerRightShift() {
3265 __ align(CodeEntryAlignment);
3266 StubCodeMark mark(this, "StubRoutines", "bigIntegerRightShiftWorker");
3267 address start = __ pc();
3268
3269 Label Shift512Loop, ShiftTwo, ShiftTwoLoop, ShiftOne, Exit;
3270 // For Unix, the arguments are as follows: rdi, rsi, rdx, rcx, r8.
3271 const Register newArr = rdi;
3272 const Register oldArr = rsi;
3273 const Register newIdx = rdx;
3274 const Register shiftCount = rcx; // It was intentional to have shiftCount in rcx since it is used implicitly for shift.
3275 const Register totalNumIter = r8;
3276
3277 // For windows, we use r9 and r10 as temps to save rdi and rsi. Thus we cannot allocate them for our temps.
3278 // For everything else, we prefer using r9 and r10 since we do not have to save them before use.
3279 const Register tmp1 = r11; // Caller save.
3280 const Register tmp2 = rax; // Caller save.
3281 const Register tmp3 = WIN64_ONLY(r12) NOT_WIN64(r9); // Windows: Callee save. Linux: Caller save.
3282 const Register tmp4 = WIN64_ONLY(r13) NOT_WIN64(r10); // Windows: Callee save. Linux: Caller save.
3283 const Register tmp5 = r14; // Callee save.
3284 const Register tmp6 = r15;
3285
3286 const XMMRegister x0 = xmm0;
3287 const XMMRegister x1 = xmm1;
3288 const XMMRegister x2 = xmm2;
3289
3290 BLOCK_COMMENT("Entry:");
3291 __ enter(); // required for proper stackwalking of RuntimeStub frame
3292
3293 #ifdef _WIN64
3294 setup_arg_regs(4);
3295 // For windows, since last argument is on stack, we need to move it to the appropriate register.
3296 __ movl(totalNumIter, Address(rsp, 6 * wordSize));
3297 // Save callee save registers.
3298 __ push(tmp3);
3299 __ push(tmp4);
3300 #endif
3301 __ push(tmp5);
3302
3303 // Rename temps used throughout the code.
3304 const Register idx = tmp1;
3305 const Register nIdx = tmp2;
3306
3307 __ xorl(idx, idx);
3308
3309 // Start right shift from end of the array.
3310 // For example, if #iteration = 4 and newIdx = 1
3311 // then dest[4] = src[4] >> shiftCount | src[3] <<< (shiftCount - 32)
3312 // if #iteration = 4 and newIdx = 0
3313 // then dest[3] = src[4] >> shiftCount | src[3] <<< (shiftCount - 32)
3314 __ movl(idx, totalNumIter);
3315 __ movl(nIdx, idx);
3316 __ addl(nIdx, newIdx);
3317
3318 // If vectorization is enabled, check if the number of iterations is at least 64
3319 // If not, then go to ShifTwo processing 2 iterations
3320 if (VM_Version::supports_avx512_vbmi2()) {
3321 __ cmpptr(totalNumIter, (AVX3Threshold/64));
3322 __ jcc(Assembler::less, ShiftTwo);
3323
3324 if (AVX3Threshold < 16 * 64) {
3325 __ cmpl(totalNumIter, 16);
3326 __ jcc(Assembler::less, ShiftTwo);
3327 }
3328 __ evpbroadcastd(x0, shiftCount, Assembler::AVX_512bit);
3329 __ subl(idx, 16);
3330 __ subl(nIdx, 16);
3331 __ BIND(Shift512Loop);
3332 __ evmovdqul(x2, Address(oldArr, idx, Address::times_4, 4), Assembler::AVX_512bit);
3333 __ evmovdqul(x1, Address(oldArr, idx, Address::times_4), Assembler::AVX_512bit);
3334 __ vpshrdvd(x2, x1, x0, Assembler::AVX_512bit);
3335 __ evmovdqul(Address(newArr, nIdx, Address::times_4), x2, Assembler::AVX_512bit);
3336 __ subl(nIdx, 16);
3337 __ subl(idx, 16);
3338 __ jcc(Assembler::greaterEqual, Shift512Loop);
3339 __ addl(idx, 16);
3340 __ addl(nIdx, 16);
3341 }
3342 __ BIND(ShiftTwo);
3343 __ cmpl(idx, 2);
3344 __ jcc(Assembler::less, ShiftOne);
3345 __ subl(idx, 2);
3346 __ subl(nIdx, 2);
3347 __ BIND(ShiftTwoLoop);
3348 __ movl(tmp5, Address(oldArr, idx, Address::times_4, 8));
3349 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 4));
3350 __ movl(tmp3, Address(oldArr, idx, Address::times_4));
3351 __ shrdl(tmp5, tmp4);
3352 __ shrdl(tmp4, tmp3);
3353 __ movl(Address(newArr, nIdx, Address::times_4, 4), tmp5);
3354 __ movl(Address(newArr, nIdx, Address::times_4), tmp4);
3355 __ subl(nIdx, 2);
3356 __ subl(idx, 2);
3357 __ jcc(Assembler::greaterEqual, ShiftTwoLoop);
3358 __ addl(idx, 2);
3359 __ addl(nIdx, 2);
3360
3361 // Do the last iteration
3362 __ BIND(ShiftOne);
3363 __ cmpl(idx, 1);
3364 __ jcc(Assembler::less, Exit);
3365 __ subl(idx, 1);
3366 __ subl(nIdx, 1);
3367 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 4));
3368 __ movl(tmp3, Address(oldArr, idx, Address::times_4));
3369 __ shrdl(tmp4, tmp3);
3370 __ movl(Address(newArr, nIdx, Address::times_4), tmp4);
3371 __ BIND(Exit);
3372 __ vzeroupper();
3373 // Restore callee save registers.
3374 __ pop(tmp5);
3375 #ifdef _WIN64
3376 __ pop(tmp4);
3377 __ pop(tmp3);
3378 restore_arg_regs();
3379 #endif
3380 __ leave(); // required for proper stackwalking of RuntimeStub frame
3381 __ ret(0);
3382
3383 return start;
3384 }
3385
3386 /**
3387 * Arguments:
3388 *
3389 * Input:
3390 * c_rarg0 - newArr address
3391 * c_rarg1 - oldArr address
3392 * c_rarg2 - newIdx
3393 * c_rarg3 - shiftCount
3394 * not Win64
3395 * c_rarg4 - numIter
3396 * Win64
3397 * rsp40 - numIter
3398 */
3399 address StubGenerator::generate_bigIntegerLeftShift() {
3400 __ align(CodeEntryAlignment);
3401 StubCodeMark mark(this, "StubRoutines", "bigIntegerLeftShiftWorker");
3402 address start = __ pc();
3403
3404 Label Shift512Loop, ShiftTwo, ShiftTwoLoop, ShiftOne, Exit;
3405 // For Unix, the arguments are as follows: rdi, rsi, rdx, rcx, r8.
3406 const Register newArr = rdi;
3407 const Register oldArr = rsi;
3408 const Register newIdx = rdx;
3409 const Register shiftCount = rcx; // It was intentional to have shiftCount in rcx since it is used implicitly for shift.
3410 const Register totalNumIter = r8;
3411 // For windows, we use r9 and r10 as temps to save rdi and rsi. Thus we cannot allocate them for our temps.
3412 // For everything else, we prefer using r9 and r10 since we do not have to save them before use.
3413 const Register tmp1 = r11; // Caller save.
3414 const Register tmp2 = rax; // Caller save.
3415 const Register tmp3 = WIN64_ONLY(r12) NOT_WIN64(r9); // Windows: Callee save. Linux: Caller save.
3416 const Register tmp4 = WIN64_ONLY(r13) NOT_WIN64(r10); // Windows: Callee save. Linux: Caller save.
3417 const Register tmp5 = r14; // Callee save.
3418
3419 const XMMRegister x0 = xmm0;
3420 const XMMRegister x1 = xmm1;
3421 const XMMRegister x2 = xmm2;
3422 BLOCK_COMMENT("Entry:");
3423 __ enter(); // required for proper stackwalking of RuntimeStub frame
3424
3425 #ifdef _WIN64
3426 setup_arg_regs(4);
3427 // For windows, since last argument is on stack, we need to move it to the appropriate register.
3428 __ movl(totalNumIter, Address(rsp, 6 * wordSize));
3429 // Save callee save registers.
3430 __ push(tmp3);
3431 __ push(tmp4);
3432 #endif
3433 __ push(tmp5);
3434
3435 // Rename temps used throughout the code
3436 const Register idx = tmp1;
3437 const Register numIterTmp = tmp2;
3438
3439 // Start idx from zero.
3440 __ xorl(idx, idx);
3441 // Compute interior pointer for new array. We do this so that we can use same index for both old and new arrays.
3442 __ lea(newArr, Address(newArr, newIdx, Address::times_4));
3443 __ movl(numIterTmp, totalNumIter);
3444
3445 // If vectorization is enabled, check if the number of iterations is at least 64
3446 // If not, then go to ShiftTwo shifting two numbers at a time
3447 if (VM_Version::supports_avx512_vbmi2()) {
3448 __ cmpl(totalNumIter, (AVX3Threshold/64));
3449 __ jcc(Assembler::less, ShiftTwo);
3450
3451 if (AVX3Threshold < 16 * 64) {
3452 __ cmpl(totalNumIter, 16);
3453 __ jcc(Assembler::less, ShiftTwo);
3454 }
3455 __ evpbroadcastd(x0, shiftCount, Assembler::AVX_512bit);
3456 __ subl(numIterTmp, 16);
3457 __ BIND(Shift512Loop);
3458 __ evmovdqul(x1, Address(oldArr, idx, Address::times_4), Assembler::AVX_512bit);
3459 __ evmovdqul(x2, Address(oldArr, idx, Address::times_4, 0x4), Assembler::AVX_512bit);
3460 __ vpshldvd(x1, x2, x0, Assembler::AVX_512bit);
3461 __ evmovdqul(Address(newArr, idx, Address::times_4), x1, Assembler::AVX_512bit);
3462 __ addl(idx, 16);
3463 __ subl(numIterTmp, 16);
3464 __ jcc(Assembler::greaterEqual, Shift512Loop);
3465 __ addl(numIterTmp, 16);
3466 }
3467 __ BIND(ShiftTwo);
3468 __ cmpl(totalNumIter, 1);
3469 __ jcc(Assembler::less, Exit);
3470 __ movl(tmp3, Address(oldArr, idx, Address::times_4));
3471 __ subl(numIterTmp, 2);
3472 __ jcc(Assembler::less, ShiftOne);
3473
3474 __ BIND(ShiftTwoLoop);
3475 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 0x4));
3476 __ movl(tmp5, Address(oldArr, idx, Address::times_4, 0x8));
3477 __ shldl(tmp3, tmp4);
3478 __ shldl(tmp4, tmp5);
3479 __ movl(Address(newArr, idx, Address::times_4), tmp3);
3480 __ movl(Address(newArr, idx, Address::times_4, 0x4), tmp4);
3481 __ movl(tmp3, tmp5);
3482 __ addl(idx, 2);
3483 __ subl(numIterTmp, 2);
3484 __ jcc(Assembler::greaterEqual, ShiftTwoLoop);
3485
3486 // Do the last iteration
3487 __ BIND(ShiftOne);
3488 __ addl(numIterTmp, 2);
3489 __ cmpl(numIterTmp, 1);
3490 __ jcc(Assembler::less, Exit);
3491 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 0x4));
3492 __ shldl(tmp3, tmp4);
3493 __ movl(Address(newArr, idx, Address::times_4), tmp3);
3494
3495 __ BIND(Exit);
3496 __ vzeroupper();
3497 // Restore callee save registers.
3498 __ pop(tmp5);
3499 #ifdef _WIN64
3500 __ pop(tmp4);
3501 __ pop(tmp3);
3502 restore_arg_regs();
3503 #endif
3504 __ leave(); // required for proper stackwalking of RuntimeStub frame
3505 __ ret(0);
3506
3507 return start;
3508 }
3509
3510 void StubGenerator::generate_libm_stubs() {
3511 if (UseLibmIntrinsic && InlineIntrinsics) {
3512 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dsin)) {
3513 StubRoutines::_dsin = generate_libmSin(); // from stubGenerator_x86_64_sin.cpp
3514 }
3515 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dcos)) {
3516 StubRoutines::_dcos = generate_libmCos(); // from stubGenerator_x86_64_cos.cpp
3517 }
3518 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dtan)) {
3519 StubRoutines::_dtan = generate_libmTan(); // from stubGenerator_x86_64_tan.cpp
3520 }
3521 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dexp)) {
3522 StubRoutines::_dexp = generate_libmExp(); // from stubGenerator_x86_64_exp.cpp
3523 }
3524 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dpow)) {
3525 StubRoutines::_dpow = generate_libmPow(); // from stubGenerator_x86_64_pow.cpp
3526 }
3527 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dlog)) {
3528 StubRoutines::_dlog = generate_libmLog(); // from stubGenerator_x86_64_log.cpp
3529 }
3530 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dlog10)) {
3531 StubRoutines::_dlog10 = generate_libmLog10(); // from stubGenerator_x86_64_log.cpp
3532 }
3533 }
3534 }
3535
3536 /**
3537 * Arguments:
3538 *
3539 * Input:
3540 * c_rarg0 - float16 jshort
3541 *
3542 * Output:
3543 * xmm0 - float
3544 */
3545 address StubGenerator::generate_float16ToFloat() {
3546 StubCodeMark mark(this, "StubRoutines", "float16ToFloat");
3547
3548 address start = __ pc();
3549
3550 BLOCK_COMMENT("Entry:");
3551 // No need for RuntimeStub frame since it is called only during JIT compilation
3552
3553 // Load value into xmm0 and convert
3554 __ flt16_to_flt(xmm0, c_rarg0);
3555
3556 __ ret(0);
3557
3558 return start;
3559 }
3560
3561 /**
3562 * Arguments:
3563 *
3564 * Input:
3565 * xmm0 - float
3566 *
3567 * Output:
3568 * rax - float16 jshort
3569 */
3570 address StubGenerator::generate_floatToFloat16() {
3571 StubCodeMark mark(this, "StubRoutines", "floatToFloat16");
3572
3573 address start = __ pc();
3574
3575 BLOCK_COMMENT("Entry:");
3576 // No need for RuntimeStub frame since it is called only during JIT compilation
3577
3578 // Convert and put result into rax
3579 __ flt_to_flt16(rax, xmm0, xmm1);
3580
3581 __ ret(0);
3582
3583 return start;
3584 }
3585
3586 address StubGenerator::generate_cont_thaw(const char* label, Continuation::thaw_kind kind) {
3587 if (!Continuations::enabled()) return nullptr;
3588
3589 bool return_barrier = Continuation::is_thaw_return_barrier(kind);
3590 bool return_barrier_exception = Continuation::is_thaw_return_barrier_exception(kind);
3591
3592 StubCodeMark mark(this, "StubRoutines", label);
3593 address start = __ pc();
3594
3595 // TODO: Handle Valhalla return types. May require generating different return barriers.
3596
3597 if (!return_barrier) {
3598 // Pop return address. If we don't do this, we get a drift,
3599 // where the bottom-most frozen frame continuously grows.
3600 __ pop(c_rarg3);
3601 } else {
3602 __ movptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
3603 }
3604
3605 #ifdef ASSERT
3606 {
3607 Label L_good_sp;
3608 __ cmpptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
3609 __ jcc(Assembler::equal, L_good_sp);
3610 __ stop("Incorrect rsp at thaw entry");
3611 __ BIND(L_good_sp);
3612 }
3613 #endif // ASSERT
3614
3615 if (return_barrier) {
3616 // Preserve possible return value from a method returning to the return barrier.
3617 __ push(rax);
3618 __ push_d(xmm0);
3619 }
3620
3621 __ movptr(c_rarg0, r15_thread);
3622 __ movptr(c_rarg1, (return_barrier ? 1 : 0));
3623 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Continuation::prepare_thaw), 2);
3624 __ movptr(rbx, rax);
3625
3626 if (return_barrier) {
3627 // Restore return value from a method returning to the return barrier.
3628 // No safepoint in the call to thaw, so even an oop return value should be OK.
3629 __ pop_d(xmm0);
3630 __ pop(rax);
3631 }
3632
3633 #ifdef ASSERT
3634 {
3635 Label L_good_sp;
3636 __ cmpptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
3637 __ jcc(Assembler::equal, L_good_sp);
3638 __ stop("Incorrect rsp after prepare thaw");
3639 __ BIND(L_good_sp);
3640 }
3641 #endif // ASSERT
3642
3643 // rbx contains the size of the frames to thaw, 0 if overflow or no more frames
3644 Label L_thaw_success;
3645 __ testptr(rbx, rbx);
3646 __ jccb(Assembler::notZero, L_thaw_success);
3647 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
3648 __ bind(L_thaw_success);
3649
3650 // Make room for the thawed frames and align the stack.
3651 __ subptr(rsp, rbx);
3652 __ andptr(rsp, -StackAlignmentInBytes);
3653
3654 if (return_barrier) {
3655 // Preserve possible return value from a method returning to the return barrier. (Again.)
3656 __ push(rax);
3657 __ push_d(xmm0);
3658 }
3659
3660 // If we want, we can templatize thaw by kind, and have three different entries.
3661 __ movptr(c_rarg0, r15_thread);
3662 __ movptr(c_rarg1, kind);
3663 __ call_VM_leaf(Continuation::thaw_entry(), 2);
3664 __ movptr(rbx, rax);
3665
3666 if (return_barrier) {
3667 // Restore return value from a method returning to the return barrier. (Again.)
3668 // No safepoint in the call to thaw, so even an oop return value should be OK.
3669 __ pop_d(xmm0);
3670 __ pop(rax);
3671 } else {
3672 // Return 0 (success) from doYield.
3673 __ xorptr(rax, rax);
3674 }
3675
3676 // After thawing, rbx is the SP of the yielding frame.
3677 // Move there, and then to saved RBP slot.
3678 __ movptr(rsp, rbx);
3679 __ subptr(rsp, 2*wordSize);
3680
3681 if (return_barrier_exception) {
3682 __ movptr(c_rarg0, r15_thread);
3683 __ movptr(c_rarg1, Address(rsp, wordSize)); // return address
3684
3685 // rax still holds the original exception oop, save it before the call
3686 __ push(rax);
3687
3688 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), 2);
3689 __ movptr(rbx, rax);
3690
3691 // Continue at exception handler:
3692 // rax: exception oop
3693 // rbx: exception handler
3694 // rdx: exception pc
3695 __ pop(rax);
3696 __ verify_oop(rax);
3697 __ pop(rbp); // pop out RBP here too
3698 __ pop(rdx);
3699 __ jmp(rbx);
3700 } else {
3701 // We are "returning" into the topmost thawed frame; see Thaw::push_return_frame
3702 __ pop(rbp);
3703 __ ret(0);
3704 }
3705
3706 return start;
3707 }
3708
3709 address StubGenerator::generate_cont_thaw() {
3710 return generate_cont_thaw("Cont thaw", Continuation::thaw_top);
3711 }
3712
3713 // TODO: will probably need multiple return barriers depending on return type
3714
3715 address StubGenerator::generate_cont_returnBarrier() {
3716 return generate_cont_thaw("Cont thaw return barrier", Continuation::thaw_return_barrier);
3717 }
3718
3719 address StubGenerator::generate_cont_returnBarrier_exception() {
3720 return generate_cont_thaw("Cont thaw return barrier exception", Continuation::thaw_return_barrier_exception);
3721 }
3722
3723 #if INCLUDE_JFR
3724
3725 // For c2: c_rarg0 is junk, call to runtime to write a checkpoint.
3726 // It returns a jobject handle to the event writer.
3727 // The handle is dereferenced and the return value is the event writer oop.
3728 RuntimeStub* StubGenerator::generate_jfr_write_checkpoint() {
3729 enum layout {
3730 rbp_off,
3731 rbpH_off,
3732 return_off,
3733 return_off2,
3734 framesize // inclusive of return address
3735 };
3736
3737 CodeBuffer code("jfr_write_checkpoint", 1024, 64);
3738 MacroAssembler* _masm = new MacroAssembler(&code);
3739 address start = __ pc();
3740
3741 __ enter();
3742 address the_pc = __ pc();
3743
3744 int frame_complete = the_pc - start;
3745
3746 __ set_last_Java_frame(rsp, rbp, the_pc, rscratch1);
3747 __ movptr(c_rarg0, r15_thread);
3748 __ call_VM_leaf(CAST_FROM_FN_PTR(address, JfrIntrinsicSupport::write_checkpoint), 1);
3749 __ reset_last_Java_frame(true);
3750
3751 // rax is jobject handle result, unpack and process it through a barrier.
3752 __ resolve_global_jobject(rax, r15_thread, c_rarg0);
3753
3754 __ leave();
3755 __ ret(0);
3756
3757 OopMapSet* oop_maps = new OopMapSet();
3758 OopMap* map = new OopMap(framesize, 1);
3759 oop_maps->add_gc_map(frame_complete, map);
3760
3761 RuntimeStub* stub =
3762 RuntimeStub::new_runtime_stub(code.name(),
3763 &code,
3764 frame_complete,
3765 (framesize >> (LogBytesPerWord - LogBytesPerInt)),
3766 oop_maps,
3767 false);
3768 return stub;
3769 }
3770
3771 #endif // INCLUDE_JFR
3772
3773 // Continuation point for throwing of implicit exceptions that are
3774 // not handled in the current activation. Fabricates an exception
3775 // oop and initiates normal exception dispatching in this
3776 // frame. Since we need to preserve callee-saved values (currently
3777 // only for C2, but done for C1 as well) we need a callee-saved oop
3778 // map and therefore have to make these stubs into RuntimeStubs
3779 // rather than BufferBlobs. If the compiler needs all registers to
3780 // be preserved between the fault point and the exception handler
3781 // then it must assume responsibility for that in
3782 // AbstractCompiler::continuation_for_implicit_null_exception or
3783 // continuation_for_implicit_division_by_zero_exception. All other
3784 // implicit exceptions (e.g., NullPointerException or
3785 // AbstractMethodError on entry) are either at call sites or
3786 // otherwise assume that stack unwinding will be initiated, so
3787 // caller saved registers were assumed volatile in the compiler.
3788 address StubGenerator::generate_throw_exception(const char* name,
3789 address runtime_entry,
3790 Register arg1,
3791 Register arg2) {
3792 // Information about frame layout at time of blocking runtime call.
3793 // Note that we only have to preserve callee-saved registers since
3794 // the compilers are responsible for supplying a continuation point
3795 // if they expect all registers to be preserved.
3796 enum layout {
3797 rbp_off = frame::arg_reg_save_area_bytes/BytesPerInt,
3798 rbp_off2,
3799 return_off,
3800 return_off2,
3801 framesize // inclusive of return address
3802 };
3803
3804 int insts_size = 512;
3805 int locs_size = 64;
3806
3807 CodeBuffer code(name, insts_size, locs_size);
3808 OopMapSet* oop_maps = new OopMapSet();
3809 MacroAssembler* _masm = new MacroAssembler(&code);
3810
3811 address start = __ pc();
3812
3813 // This is an inlined and slightly modified version of call_VM
3814 // which has the ability to fetch the return PC out of
3815 // thread-local storage and also sets up last_Java_sp slightly
3816 // differently than the real call_VM
3817
3818 __ enter(); // required for proper stackwalking of RuntimeStub frame
3819
3820 assert(is_even(framesize/2), "sp not 16-byte aligned");
3821
3822 // return address and rbp are already in place
3823 __ subptr(rsp, (framesize-4) << LogBytesPerInt); // prolog
3824
3825 int frame_complete = __ pc() - start;
3826
3827 // Set up last_Java_sp and last_Java_fp
3828 address the_pc = __ pc();
3829 __ set_last_Java_frame(rsp, rbp, the_pc, rscratch1);
3830 __ andptr(rsp, -(StackAlignmentInBytes)); // Align stack
3831
3832 // Call runtime
3833 if (arg1 != noreg) {
3834 assert(arg2 != c_rarg1, "clobbered");
3835 __ movptr(c_rarg1, arg1);
3836 }
3837 if (arg2 != noreg) {
3838 __ movptr(c_rarg2, arg2);
3839 }
3840 __ movptr(c_rarg0, r15_thread);
3841 BLOCK_COMMENT("call runtime_entry");
3842 __ call(RuntimeAddress(runtime_entry));
3843
3844 // Generate oop map
3845 OopMap* map = new OopMap(framesize, 0);
3846
3847 oop_maps->add_gc_map(the_pc - start, map);
3848
3849 __ reset_last_Java_frame(true);
3850
3851 __ leave(); // required for proper stackwalking of RuntimeStub frame
3852
3853 // check for pending exceptions
3854 #ifdef ASSERT
3855 Label L;
3856 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
3857 __ jcc(Assembler::notEqual, L);
3858 __ should_not_reach_here();
3859 __ bind(L);
3860 #endif // ASSERT
3861 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
3862
3863
3864 // codeBlob framesize is in words (not VMRegImpl::slot_size)
3865 RuntimeStub* stub =
3866 RuntimeStub::new_runtime_stub(name,
3867 &code,
3868 frame_complete,
3869 (framesize >> (LogBytesPerWord - LogBytesPerInt)),
3870 oop_maps, false);
3871 return stub->entry_point();
3872 }
3873
3874 void StubGenerator::create_control_words() {
3875 // Round to nearest, 64-bit mode, exceptions masked
3876 StubRoutines::x86::_mxcsr_std = 0x1F80;
3877 }
3878
3879 // Initialization
3880 void StubGenerator::generate_initial_stubs() {
3881 // Generates all stubs and initializes the entry points
3882
3883 // This platform-specific settings are needed by generate_call_stub()
3884 create_control_words();
3885
3886 // Initialize table for unsafe copy memeory check.
3887 if (UnsafeCopyMemory::_table == nullptr) {
3888 UnsafeCopyMemory::create_table(16);
3889 }
3890
3891 // entry points that exist in all platforms Note: This is code
3892 // that could be shared among different platforms - however the
3893 // benefit seems to be smaller than the disadvantage of having a
3894 // much more complicated generator structure. See also comment in
3895 // stubRoutines.hpp.
3896
3897 StubRoutines::_forward_exception_entry = generate_forward_exception();
3898
3899 // Generate these first because they are called from other stubs
3900 if (InlineTypeReturnedAsFields) {
3901 StubRoutines::_load_inline_type_fields_in_regs =
3902 generate_return_value_stub(CAST_FROM_FN_PTR(address, SharedRuntime::load_inline_type_fields_in_regs),
3903 "load_inline_type_fields_in_regs", false);
3904 StubRoutines::_store_inline_type_fields_to_buf =
3905 generate_return_value_stub(CAST_FROM_FN_PTR(address, SharedRuntime::store_inline_type_fields_to_buf),
3906 "store_inline_type_fields_to_buf", true);
3907 }
3908
3909 StubRoutines::_call_stub_entry =
3910 generate_call_stub(StubRoutines::_call_stub_return_address);
3911
3912 // is referenced by megamorphic call
3913 StubRoutines::_catch_exception_entry = generate_catch_exception();
3914
3915 // atomic calls
3916 StubRoutines::_fence_entry = generate_orderaccess_fence();
3917
3918 // platform dependent
3919 StubRoutines::x86::_get_previous_sp_entry = generate_get_previous_sp();
3920
3921 StubRoutines::x86::_verify_mxcsr_entry = generate_verify_mxcsr();
3922
3923 StubRoutines::x86::_f2i_fixup = generate_f2i_fixup();
3924 StubRoutines::x86::_f2l_fixup = generate_f2l_fixup();
3925 StubRoutines::x86::_d2i_fixup = generate_d2i_fixup();
3926 StubRoutines::x86::_d2l_fixup = generate_d2l_fixup();
3927
3928 StubRoutines::x86::_float_sign_mask = generate_fp_mask("float_sign_mask", 0x7FFFFFFF7FFFFFFF);
3929 StubRoutines::x86::_float_sign_flip = generate_fp_mask("float_sign_flip", 0x8000000080000000);
3930 StubRoutines::x86::_double_sign_mask = generate_fp_mask("double_sign_mask", 0x7FFFFFFFFFFFFFFF);
3931 StubRoutines::x86::_double_sign_flip = generate_fp_mask("double_sign_flip", 0x8000000000000000);
3932
3933 // Build this early so it's available for the interpreter.
3934 StubRoutines::_throw_StackOverflowError_entry =
3935 generate_throw_exception("StackOverflowError throw_exception",
3936 CAST_FROM_FN_PTR(address,
3937 SharedRuntime::
3938 throw_StackOverflowError));
3939 StubRoutines::_throw_delayed_StackOverflowError_entry =
3940 generate_throw_exception("delayed StackOverflowError throw_exception",
3941 CAST_FROM_FN_PTR(address,
3942 SharedRuntime::
3943 throw_delayed_StackOverflowError));
3944 if (UseCRC32Intrinsics) {
3945 // set table address before stub generation which use it
3946 StubRoutines::_crc_table_adr = (address)StubRoutines::x86::_crc_table;
3947 StubRoutines::_updateBytesCRC32 = generate_updateBytesCRC32();
3948 }
3949
3950 if (UseCRC32CIntrinsics) {
3951 bool supports_clmul = VM_Version::supports_clmul();
3952 StubRoutines::x86::generate_CRC32C_table(supports_clmul);
3953 StubRoutines::_crc32c_table_addr = (address)StubRoutines::x86::_crc32c_table;
3954 StubRoutines::_updateBytesCRC32C = generate_updateBytesCRC32C(supports_clmul);
3955 }
3956
3957 if (VM_Version::supports_float16()) {
3958 // For results consistency both intrinsics should be enabled.
3959 // vmIntrinsics checks InlineIntrinsics flag, no need to check it here.
3960 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_float16ToFloat) &&
3961 vmIntrinsics::is_intrinsic_available(vmIntrinsics::_floatToFloat16)) {
3962 StubRoutines::_hf2f = generate_float16ToFloat();
3963 StubRoutines::_f2hf = generate_floatToFloat16();
3964 }
3965 }
3966
3967 generate_libm_stubs();
3968 }
3969
3970 // Call here from the interpreter or compiled code to either load
3971 // multiple returned values from the inline type instance being
3972 // returned to registers or to store returned values to a newly
3973 // allocated inline type instance.
3974 // Register is a class, but it would be assigned numerical value.
3975 // "0" is assigned for xmm0. Thus we need to ignore -Wnonnull.
3976 PRAGMA_DIAG_PUSH
3977 PRAGMA_NONNULL_IGNORED
3978 address StubGenerator::generate_return_value_stub(address destination, const char* name, bool has_res) {
3979 // We need to save all registers the calling convention may use so
3980 // the runtime calls read or update those registers. This needs to
3981 // be in sync with SharedRuntime::java_return_convention().
3982 enum layout {
3983 pad_off = frame::arg_reg_save_area_bytes/BytesPerInt, pad_off_2,
3984 rax_off, rax_off_2,
3985 j_rarg5_off, j_rarg5_2,
3986 j_rarg4_off, j_rarg4_2,
3987 j_rarg3_off, j_rarg3_2,
3988 j_rarg2_off, j_rarg2_2,
3989 j_rarg1_off, j_rarg1_2,
3990 j_rarg0_off, j_rarg0_2,
3991 j_farg0_off, j_farg0_2,
3992 j_farg1_off, j_farg1_2,
3993 j_farg2_off, j_farg2_2,
3994 j_farg3_off, j_farg3_2,
3995 j_farg4_off, j_farg4_2,
3996 j_farg5_off, j_farg5_2,
3997 j_farg6_off, j_farg6_2,
3998 j_farg7_off, j_farg7_2,
3999 rbp_off, rbp_off_2,
4000 return_off, return_off_2,
4001
4002 framesize
4003 };
4004
4005 CodeBuffer buffer(name, 1000, 512);
4006 MacroAssembler* _masm = new MacroAssembler(&buffer);
4007
4008 int frame_size_in_bytes = align_up(framesize*BytesPerInt, 16);
4009 assert(frame_size_in_bytes == framesize*BytesPerInt, "misaligned");
4010 int frame_size_in_slots = frame_size_in_bytes / BytesPerInt;
4011 int frame_size_in_words = frame_size_in_bytes / wordSize;
4012
4013 OopMapSet *oop_maps = new OopMapSet();
4014 OopMap* map = new OopMap(frame_size_in_slots, 0);
4015
4016 map->set_callee_saved(VMRegImpl::stack2reg(rax_off), rax->as_VMReg());
4017 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg5_off), j_rarg5->as_VMReg());
4018 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg4_off), j_rarg4->as_VMReg());
4019 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg3_off), j_rarg3->as_VMReg());
4020 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg2_off), j_rarg2->as_VMReg());
4021 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg1_off), j_rarg1->as_VMReg());
4022 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg0_off), j_rarg0->as_VMReg());
4023 map->set_callee_saved(VMRegImpl::stack2reg(j_farg0_off), j_farg0->as_VMReg());
4024 map->set_callee_saved(VMRegImpl::stack2reg(j_farg1_off), j_farg1->as_VMReg());
4025 map->set_callee_saved(VMRegImpl::stack2reg(j_farg2_off), j_farg2->as_VMReg());
4026 map->set_callee_saved(VMRegImpl::stack2reg(j_farg3_off), j_farg3->as_VMReg());
4027 map->set_callee_saved(VMRegImpl::stack2reg(j_farg4_off), j_farg4->as_VMReg());
4028 map->set_callee_saved(VMRegImpl::stack2reg(j_farg5_off), j_farg5->as_VMReg());
4029 map->set_callee_saved(VMRegImpl::stack2reg(j_farg6_off), j_farg6->as_VMReg());
4030 map->set_callee_saved(VMRegImpl::stack2reg(j_farg7_off), j_farg7->as_VMReg());
4031
4032 int start = __ offset();
4033
4034 __ subptr(rsp, frame_size_in_bytes - 8 /* return address*/);
4035
4036 __ movptr(Address(rsp, rbp_off * BytesPerInt), rbp);
4037 __ movdbl(Address(rsp, j_farg7_off * BytesPerInt), j_farg7);
4038 __ movdbl(Address(rsp, j_farg6_off * BytesPerInt), j_farg6);
4039 __ movdbl(Address(rsp, j_farg5_off * BytesPerInt), j_farg5);
4040 __ movdbl(Address(rsp, j_farg4_off * BytesPerInt), j_farg4);
4041 __ movdbl(Address(rsp, j_farg3_off * BytesPerInt), j_farg3);
4042 __ movdbl(Address(rsp, j_farg2_off * BytesPerInt), j_farg2);
4043 __ movdbl(Address(rsp, j_farg1_off * BytesPerInt), j_farg1);
4044 __ movdbl(Address(rsp, j_farg0_off * BytesPerInt), j_farg0);
4045
4046 __ movptr(Address(rsp, j_rarg0_off * BytesPerInt), j_rarg0);
4047 __ movptr(Address(rsp, j_rarg1_off * BytesPerInt), j_rarg1);
4048 __ movptr(Address(rsp, j_rarg2_off * BytesPerInt), j_rarg2);
4049 __ movptr(Address(rsp, j_rarg3_off * BytesPerInt), j_rarg3);
4050 __ movptr(Address(rsp, j_rarg4_off * BytesPerInt), j_rarg4);
4051 __ movptr(Address(rsp, j_rarg5_off * BytesPerInt), j_rarg5);
4052 __ movptr(Address(rsp, rax_off * BytesPerInt), rax);
4053
4054 int frame_complete = __ offset();
4055
4056 __ set_last_Java_frame(noreg, noreg, NULL, rscratch1);
4057
4058 __ mov(c_rarg0, r15_thread);
4059 __ mov(c_rarg1, rax);
4060
4061 __ call(RuntimeAddress(destination));
4062
4063 // Set an oopmap for the call site.
4064
4065 oop_maps->add_gc_map( __ offset() - start, map);
4066
4067 // clear last_Java_sp
4068 __ reset_last_Java_frame(false);
4069
4070 __ movptr(rbp, Address(rsp, rbp_off * BytesPerInt));
4071 __ movdbl(j_farg7, Address(rsp, j_farg7_off * BytesPerInt));
4072 __ movdbl(j_farg6, Address(rsp, j_farg6_off * BytesPerInt));
4073 __ movdbl(j_farg5, Address(rsp, j_farg5_off * BytesPerInt));
4074 __ movdbl(j_farg4, Address(rsp, j_farg4_off * BytesPerInt));
4075 __ movdbl(j_farg3, Address(rsp, j_farg3_off * BytesPerInt));
4076 __ movdbl(j_farg2, Address(rsp, j_farg2_off * BytesPerInt));
4077 __ movdbl(j_farg1, Address(rsp, j_farg1_off * BytesPerInt));
4078 __ movdbl(j_farg0, Address(rsp, j_farg0_off * BytesPerInt));
4079
4080 __ movptr(j_rarg0, Address(rsp, j_rarg0_off * BytesPerInt));
4081 __ movptr(j_rarg1, Address(rsp, j_rarg1_off * BytesPerInt));
4082 __ movptr(j_rarg2, Address(rsp, j_rarg2_off * BytesPerInt));
4083 __ movptr(j_rarg3, Address(rsp, j_rarg3_off * BytesPerInt));
4084 __ movptr(j_rarg4, Address(rsp, j_rarg4_off * BytesPerInt));
4085 __ movptr(j_rarg5, Address(rsp, j_rarg5_off * BytesPerInt));
4086 __ movptr(rax, Address(rsp, rax_off * BytesPerInt));
4087
4088 __ addptr(rsp, frame_size_in_bytes-8);
4089
4090 // check for pending exceptions
4091 Label pending;
4092 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
4093 __ jcc(Assembler::notEqual, pending);
4094
4095 if (has_res) {
4096 __ get_vm_result(rax, r15_thread);
4097 }
4098
4099 __ ret(0);
4100
4101 __ bind(pending);
4102
4103 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset()));
4104 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
4105
4106 // -------------
4107 // make sure all code is generated
4108 _masm->flush();
4109
4110 RuntimeStub* stub = RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_in_words, oop_maps, false);
4111 return stub->entry_point();
4112 }
4113
4114 void StubGenerator::generate_continuation_stubs() {
4115 // Continuation stubs:
4116 StubRoutines::_cont_thaw = generate_cont_thaw();
4117 StubRoutines::_cont_returnBarrier = generate_cont_returnBarrier();
4118 StubRoutines::_cont_returnBarrierExc = generate_cont_returnBarrier_exception();
4119
4120 JFR_ONLY(StubRoutines::_jfr_write_checkpoint_stub = generate_jfr_write_checkpoint();)
4121 JFR_ONLY(StubRoutines::_jfr_write_checkpoint = StubRoutines::_jfr_write_checkpoint_stub->entry_point();)
4122 }
4123
4124 void StubGenerator::generate_final_stubs() {
4125 // Generates the rest of stubs and initializes the entry points
4126
4127 // These entry points require SharedInfo::stack0 to be set up in
4128 // non-core builds and need to be relocatable, so they each
4129 // fabricate a RuntimeStub internally.
4130 StubRoutines::_throw_AbstractMethodError_entry =
4131 generate_throw_exception("AbstractMethodError throw_exception",
4132 CAST_FROM_FN_PTR(address,
4133 SharedRuntime::
4134 throw_AbstractMethodError));
4135
4136 StubRoutines::_throw_IncompatibleClassChangeError_entry =
4137 generate_throw_exception("IncompatibleClassChangeError throw_exception",
4138 CAST_FROM_FN_PTR(address,
4139 SharedRuntime::
4140 throw_IncompatibleClassChangeError));
4141
4142 StubRoutines::_throw_NullPointerException_at_call_entry =
4143 generate_throw_exception("NullPointerException at call throw_exception",
4144 CAST_FROM_FN_PTR(address,
4145 SharedRuntime::
4146 throw_NullPointerException_at_call));
4147
4148 // support for verify_oop (must happen after universe_init)
4149 if (VerifyOops) {
4150 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop();
4151 }
4152
4153 // data cache line writeback
4154 StubRoutines::_data_cache_writeback = generate_data_cache_writeback();
4155 StubRoutines::_data_cache_writeback_sync = generate_data_cache_writeback_sync();
4156
4157 // arraycopy stubs used by compilers
4158 generate_arraycopy_stubs();
4159
4160 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
4161 if (bs_nm != nullptr) {
4162 StubRoutines::x86::_method_entry_barrier = generate_method_entry_barrier();
4163 }
4164
4165 if (UseVectorizedMismatchIntrinsic) {
4166 StubRoutines::_vectorizedMismatch = generate_vectorizedMismatch();
4167 }
4168 }
4169
4170 void StubGenerator::generate_compiler_stubs() {
4171 #if COMPILER2_OR_JVMCI
4172
4173 // Entry points that are C2 compiler specific.
4174
4175 StubRoutines::x86::_vector_float_sign_mask = generate_vector_mask("vector_float_sign_mask", 0x7FFFFFFF7FFFFFFF);
4176 StubRoutines::x86::_vector_float_sign_flip = generate_vector_mask("vector_float_sign_flip", 0x8000000080000000);
4177 StubRoutines::x86::_vector_double_sign_mask = generate_vector_mask("vector_double_sign_mask", 0x7FFFFFFFFFFFFFFF);
4178 StubRoutines::x86::_vector_double_sign_flip = generate_vector_mask("vector_double_sign_flip", 0x8000000000000000);
4179 StubRoutines::x86::_vector_all_bits_set = generate_vector_mask("vector_all_bits_set", 0xFFFFFFFFFFFFFFFF);
4180 StubRoutines::x86::_vector_int_mask_cmp_bits = generate_vector_mask("vector_int_mask_cmp_bits", 0x0000000100000001);
4181 StubRoutines::x86::_vector_short_to_byte_mask = generate_vector_mask("vector_short_to_byte_mask", 0x00ff00ff00ff00ff);
4182 StubRoutines::x86::_vector_byte_perm_mask = generate_vector_byte_perm_mask("vector_byte_perm_mask");
4183 StubRoutines::x86::_vector_int_to_byte_mask = generate_vector_mask("vector_int_to_byte_mask", 0x000000ff000000ff);
4184 StubRoutines::x86::_vector_int_to_short_mask = generate_vector_mask("vector_int_to_short_mask", 0x0000ffff0000ffff);
4185 StubRoutines::x86::_vector_32_bit_mask = generate_vector_custom_i32("vector_32_bit_mask", Assembler::AVX_512bit,
4186 0xFFFFFFFF, 0, 0, 0);
4187 StubRoutines::x86::_vector_64_bit_mask = generate_vector_custom_i32("vector_64_bit_mask", Assembler::AVX_512bit,
4188 0xFFFFFFFF, 0xFFFFFFFF, 0, 0);
4189 StubRoutines::x86::_vector_int_shuffle_mask = generate_vector_mask("vector_int_shuffle_mask", 0x0302010003020100);
4190 StubRoutines::x86::_vector_byte_shuffle_mask = generate_vector_byte_shuffle_mask("vector_byte_shuffle_mask");
4191 StubRoutines::x86::_vector_short_shuffle_mask = generate_vector_mask("vector_short_shuffle_mask", 0x0100010001000100);
4192 StubRoutines::x86::_vector_long_shuffle_mask = generate_vector_mask("vector_long_shuffle_mask", 0x0000000100000000);
4193 StubRoutines::x86::_vector_long_sign_mask = generate_vector_mask("vector_long_sign_mask", 0x8000000000000000);
4194 StubRoutines::x86::_vector_iota_indices = generate_iota_indices("iota_indices");
4195 StubRoutines::x86::_vector_count_leading_zeros_lut = generate_count_leading_zeros_lut("count_leading_zeros_lut");
4196 StubRoutines::x86::_vector_reverse_bit_lut = generate_vector_reverse_bit_lut("reverse_bit_lut");
4197 StubRoutines::x86::_vector_reverse_byte_perm_mask_long = generate_vector_reverse_byte_perm_mask_long("perm_mask_long");
4198 StubRoutines::x86::_vector_reverse_byte_perm_mask_int = generate_vector_reverse_byte_perm_mask_int("perm_mask_int");
4199 StubRoutines::x86::_vector_reverse_byte_perm_mask_short = generate_vector_reverse_byte_perm_mask_short("perm_mask_short");
4200
4201 if (VM_Version::supports_avx2() && !VM_Version::supports_avx512_vpopcntdq()) {
4202 // lut implementation influenced by counting 1s algorithm from section 5-1 of Hackers' Delight.
4203 StubRoutines::x86::_vector_popcount_lut = generate_popcount_avx_lut("popcount_lut");
4204 }
4205
4206 generate_aes_stubs();
4207
4208 generate_ghash_stubs();
4209
4210 generate_chacha_stubs();
4211
4212 if (UseAdler32Intrinsics) {
4213 StubRoutines::_updateBytesAdler32 = generate_updateBytesAdler32();
4214 }
4215
4216 if (UsePoly1305Intrinsics) {
4217 StubRoutines::_poly1305_processBlocks = generate_poly1305_processBlocks();
4218 }
4219
4220 if (UseMD5Intrinsics) {
4221 StubRoutines::_md5_implCompress = generate_md5_implCompress(false, "md5_implCompress");
4222 StubRoutines::_md5_implCompressMB = generate_md5_implCompress(true, "md5_implCompressMB");
4223 }
4224
4225 if (UseSHA1Intrinsics) {
4226 StubRoutines::x86::_upper_word_mask_addr = generate_upper_word_mask();
4227 StubRoutines::x86::_shuffle_byte_flip_mask_addr = generate_shuffle_byte_flip_mask();
4228 StubRoutines::_sha1_implCompress = generate_sha1_implCompress(false, "sha1_implCompress");
4229 StubRoutines::_sha1_implCompressMB = generate_sha1_implCompress(true, "sha1_implCompressMB");
4230 }
4231
4232 if (UseSHA256Intrinsics) {
4233 StubRoutines::x86::_k256_adr = (address)StubRoutines::x86::_k256;
4234 char* dst = (char*)StubRoutines::x86::_k256_W;
4235 char* src = (char*)StubRoutines::x86::_k256;
4236 for (int ii = 0; ii < 16; ++ii) {
4237 memcpy(dst + 32 * ii, src + 16 * ii, 16);
4238 memcpy(dst + 32 * ii + 16, src + 16 * ii, 16);
4239 }
4240 StubRoutines::x86::_k256_W_adr = (address)StubRoutines::x86::_k256_W;
4241 StubRoutines::x86::_pshuffle_byte_flip_mask_addr = generate_pshuffle_byte_flip_mask();
4242 StubRoutines::_sha256_implCompress = generate_sha256_implCompress(false, "sha256_implCompress");
4243 StubRoutines::_sha256_implCompressMB = generate_sha256_implCompress(true, "sha256_implCompressMB");
4244 }
4245
4246 if (UseSHA512Intrinsics) {
4247 StubRoutines::x86::_k512_W_addr = (address)StubRoutines::x86::_k512_W;
4248 StubRoutines::x86::_pshuffle_byte_flip_mask_addr_sha512 = generate_pshuffle_byte_flip_mask_sha512();
4249 StubRoutines::_sha512_implCompress = generate_sha512_implCompress(false, "sha512_implCompress");
4250 StubRoutines::_sha512_implCompressMB = generate_sha512_implCompress(true, "sha512_implCompressMB");
4251 }
4252
4253 if (UseBASE64Intrinsics) {
4254 if(VM_Version::supports_avx2()) {
4255 StubRoutines::x86::_avx2_shuffle_base64 = base64_avx2_shuffle_addr();
4256 StubRoutines::x86::_avx2_input_mask_base64 = base64_avx2_input_mask_addr();
4257 StubRoutines::x86::_avx2_lut_base64 = base64_avx2_lut_addr();
4258 StubRoutines::x86::_avx2_decode_tables_base64 = base64_AVX2_decode_tables_addr();
4259 StubRoutines::x86::_avx2_decode_lut_tables_base64 = base64_AVX2_decode_LUT_tables_addr();
4260 }
4261 StubRoutines::x86::_encoding_table_base64 = base64_encoding_table_addr();
4262 if (VM_Version::supports_avx512_vbmi()) {
4263 StubRoutines::x86::_shuffle_base64 = base64_shuffle_addr();
4264 StubRoutines::x86::_lookup_lo_base64 = base64_vbmi_lookup_lo_addr();
4265 StubRoutines::x86::_lookup_hi_base64 = base64_vbmi_lookup_hi_addr();
4266 StubRoutines::x86::_lookup_lo_base64url = base64_vbmi_lookup_lo_url_addr();
4267 StubRoutines::x86::_lookup_hi_base64url = base64_vbmi_lookup_hi_url_addr();
4268 StubRoutines::x86::_pack_vec_base64 = base64_vbmi_pack_vec_addr();
4269 StubRoutines::x86::_join_0_1_base64 = base64_vbmi_join_0_1_addr();
4270 StubRoutines::x86::_join_1_2_base64 = base64_vbmi_join_1_2_addr();
4271 StubRoutines::x86::_join_2_3_base64 = base64_vbmi_join_2_3_addr();
4272 }
4273 StubRoutines::x86::_decoding_table_base64 = base64_decoding_table_addr();
4274 StubRoutines::_base64_encodeBlock = generate_base64_encodeBlock();
4275 StubRoutines::_base64_decodeBlock = generate_base64_decodeBlock();
4276 }
4277
4278 #ifdef COMPILER2
4279 if (UseMultiplyToLenIntrinsic) {
4280 StubRoutines::_multiplyToLen = generate_multiplyToLen();
4281 }
4282 if (UseSquareToLenIntrinsic) {
4283 StubRoutines::_squareToLen = generate_squareToLen();
4284 }
4285 if (UseMulAddIntrinsic) {
4286 StubRoutines::_mulAdd = generate_mulAdd();
4287 }
4288 if (VM_Version::supports_avx512_vbmi2()) {
4289 StubRoutines::_bigIntegerRightShiftWorker = generate_bigIntegerRightShift();
4290 StubRoutines::_bigIntegerLeftShiftWorker = generate_bigIntegerLeftShift();
4291 }
4292 if (UseMontgomeryMultiplyIntrinsic) {
4293 StubRoutines::_montgomeryMultiply
4294 = CAST_FROM_FN_PTR(address, SharedRuntime::montgomery_multiply);
4295 }
4296 if (UseMontgomerySquareIntrinsic) {
4297 StubRoutines::_montgomerySquare
4298 = CAST_FROM_FN_PTR(address, SharedRuntime::montgomery_square);
4299 }
4300
4301 // Get svml stub routine addresses
4302 void *libjsvml = nullptr;
4303 char ebuf[1024];
4304 char dll_name[JVM_MAXPATHLEN];
4305 if (os::dll_locate_lib(dll_name, sizeof(dll_name), Arguments::get_dll_dir(), "jsvml")) {
4306 libjsvml = os::dll_load(dll_name, ebuf, sizeof ebuf);
4307 }
4308 if (libjsvml != nullptr) {
4309 // SVML method naming convention
4310 // All the methods are named as __jsvml_op<T><N>_ha_<VV>
4311 // Where:
4312 // ha stands for high accuracy
4313 // <T> is optional to indicate float/double
4314 // Set to f for vector float operation
4315 // Omitted for vector double operation
4316 // <N> is the number of elements in the vector
4317 // 1, 2, 4, 8, 16
4318 // e.g. 128 bit float vector has 4 float elements
4319 // <VV> indicates the avx/sse level:
4320 // z0 is AVX512, l9 is AVX2, e9 is AVX1 and ex is for SSE2
4321 // e.g. __jsvml_expf16_ha_z0 is the method for computing 16 element vector float exp using AVX 512 insns
4322 // __jsvml_exp8_ha_z0 is the method for computing 8 element vector double exp using AVX 512 insns
4323
4324 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, JNI_LIB_PREFIX "jsvml" JNI_LIB_SUFFIX, p2i(libjsvml));
4325 if (UseAVX > 2) {
4326 for (int op = 0; op < VectorSupport::NUM_SVML_OP; op++) {
4327 int vop = VectorSupport::VECTOR_OP_SVML_START + op;
4328 if ((!VM_Version::supports_avx512dq()) &&
4329 (vop == VectorSupport::VECTOR_OP_LOG || vop == VectorSupport::VECTOR_OP_LOG10 || vop == VectorSupport::VECTOR_OP_POW)) {
4330 continue;
4331 }
4332 snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf16_ha_z0", VectorSupport::svmlname[op]);
4333 StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_512][op] = (address)os::dll_lookup(libjsvml, ebuf);
4334
4335 snprintf(ebuf, sizeof(ebuf), "__jsvml_%s8_ha_z0", VectorSupport::svmlname[op]);
4336 StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_512][op] = (address)os::dll_lookup(libjsvml, ebuf);
4337 }
4338 }
4339 const char* avx_sse_str = (UseAVX >= 2) ? "l9" : ((UseAVX == 1) ? "e9" : "ex");
4340 for (int op = 0; op < VectorSupport::NUM_SVML_OP; op++) {
4341 int vop = VectorSupport::VECTOR_OP_SVML_START + op;
4342 if (vop == VectorSupport::VECTOR_OP_POW) {
4343 continue;
4344 }
4345 snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf4_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4346 StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_64][op] = (address)os::dll_lookup(libjsvml, ebuf);
4347
4348 snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf4_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4349 StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_128][op] = (address)os::dll_lookup(libjsvml, ebuf);
4350
4351 snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf8_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4352 StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_256][op] = (address)os::dll_lookup(libjsvml, ebuf);
4353
4354 snprintf(ebuf, sizeof(ebuf), "__jsvml_%s1_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4355 StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_64][op] = (address)os::dll_lookup(libjsvml, ebuf);
4356
4357 snprintf(ebuf, sizeof(ebuf), "__jsvml_%s2_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4358 StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_128][op] = (address)os::dll_lookup(libjsvml, ebuf);
4359
4360 snprintf(ebuf, sizeof(ebuf), "__jsvml_%s4_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4361 StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_256][op] = (address)os::dll_lookup(libjsvml, ebuf);
4362 }
4363 }
4364 #endif // COMPILER2
4365 #endif // COMPILER2_OR_JVMCI
4366 }
4367
4368 StubGenerator::StubGenerator(CodeBuffer* code, StubsKind kind) : StubCodeGenerator(code) {
4369 DEBUG_ONLY( _regs_in_thread = false; )
4370 switch(kind) {
4371 case Initial_stubs:
4372 generate_initial_stubs();
4373 break;
4374 case Continuation_stubs:
4375 generate_continuation_stubs();
4376 break;
4377 case Compiler_stubs:
4378 generate_compiler_stubs();
4379 break;
4380 case Final_stubs:
4381 generate_final_stubs();
4382 break;
4383 default:
4384 fatal("unexpected stubs kind: %d", kind);
4385 break;
4386 };
4387 }
4388
4389 void StubGenerator_generate(CodeBuffer* code, StubCodeGenerator::StubsKind kind) {
4390 StubGenerator g(code, kind);
4391 }
4392
4393 #undef __