1 /*
2 * Copyright (c) 2003, 2022, 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_ZGC
51 #include "gc/z/zThreadLocalData.hpp"
52 #endif
53 #if INCLUDE_JFR
54 #include "jfr/support/jfrIntrinsics.hpp"
55 #endif
56
57 // For a more detailed description of the stub routine structure
58 // see the comment in stubRoutines.hpp
59
60 #define __ _masm->
61 #define TIMES_OOP (UseCompressedOops ? Address::times_4 : Address::times_8)
62
63 #ifdef PRODUCT
64 #define BLOCK_COMMENT(str) /* nothing */
65 #else
66 #define BLOCK_COMMENT(str) __ block_comment(str)
67 #endif // PRODUCT
68
69 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
70
71 //
72 // Linux Arguments:
73 // c_rarg0: call wrapper address address
74 // c_rarg1: result address
75 // c_rarg2: result type BasicType
76 // c_rarg3: method Method*
77 // c_rarg4: (interpreter) entry point address
78 // c_rarg5: parameters intptr_t*
79 // 16(rbp): parameter size (in words) int
80 // 24(rbp): thread Thread*
81 //
82 // [ return_from_Java ] <--- rsp
83 // [ argument word n ]
84 // ...
85 // -12 [ argument word 1 ]
86 // -11 [ saved r15 ] <--- rsp_after_call
87 // -10 [ saved r14 ]
88 // -9 [ saved r13 ]
89 // -8 [ saved r12 ]
90 // -7 [ saved rbx ]
91 // -6 [ call wrapper ]
92 // -5 [ result ]
93 // -4 [ result type ]
94 // -3 [ method ]
95 // -2 [ entry point ]
96 // -1 [ parameters ]
97 // 0 [ saved rbp ] <--- rbp
98 // 1 [ return address ]
99 // 2 [ parameter size ]
100 // 3 [ thread ]
101 //
102 // Windows Arguments:
103 // c_rarg0: call wrapper address address
104 // c_rarg1: result address
105 // c_rarg2: result type BasicType
106 // c_rarg3: method Method*
107 // 48(rbp): (interpreter) entry point address
108 // 56(rbp): parameters intptr_t*
109 // 64(rbp): parameter size (in words) int
110 // 72(rbp): thread Thread*
111 //
112 // [ return_from_Java ] <--- rsp
113 // [ argument word n ]
114 // ...
115 // -60 [ argument word 1 ]
116 // -59 [ saved xmm31 ] <--- rsp after_call
117 // [ saved xmm16-xmm30 ] (EVEX enabled, else the space is blank)
118 // -27 [ saved xmm15 ]
119 // [ saved xmm7-xmm14 ]
120 // -9 [ saved xmm6 ] (each xmm register takes 2 slots)
121 // -7 [ saved r15 ]
122 // -6 [ saved r14 ]
123 // -5 [ saved r13 ]
124 // -4 [ saved r12 ]
125 // -3 [ saved rdi ]
126 // -2 [ saved rsi ]
127 // -1 [ saved rbx ]
128 // 0 [ saved rbp ] <--- rbp
129 // 1 [ return address ]
130 // 2 [ call wrapper ]
131 // 3 [ result ]
132 // 4 [ result type ]
133 // 5 [ method ]
134 // 6 [ entry point ]
135 // 7 [ parameters ]
136 // 8 [ parameter size ]
137 // 9 [ thread ]
138 //
139 // Windows reserves the callers stack space for arguments 1-4.
140 // We spill c_rarg0-c_rarg3 to this space.
141
142 // Call stub stack layout word offsets from rbp
143 #ifdef _WIN64
144 enum call_stub_layout {
145 xmm_save_first = 6, // save from xmm6
146 xmm_save_last = 31, // to xmm31
147 xmm_save_base = -9,
148 rsp_after_call_off = xmm_save_base - 2 * (xmm_save_last - xmm_save_first), // -27
149 r15_off = -7,
150 r14_off = -6,
151 r13_off = -5,
152 r12_off = -4,
153 rdi_off = -3,
154 rsi_off = -2,
155 rbx_off = -1,
156 rbp_off = 0,
157 retaddr_off = 1,
158 call_wrapper_off = 2,
159 result_off = 3,
160 result_type_off = 4,
161 method_off = 5,
162 entry_point_off = 6,
163 parameters_off = 7,
164 parameter_size_off = 8,
165 thread_off = 9
166 };
167
168 static Address xmm_save(int reg) {
169 assert(reg >= xmm_save_first && reg <= xmm_save_last, "XMM register number out of range");
170 return Address(rbp, (xmm_save_base - (reg - xmm_save_first) * 2) * wordSize);
171 }
172 #else // !_WIN64
173 enum call_stub_layout {
174 rsp_after_call_off = -12,
175 mxcsr_off = rsp_after_call_off,
176 r15_off = -11,
177 r14_off = -10,
178 r13_off = -9,
179 r12_off = -8,
180 rbx_off = -7,
181 call_wrapper_off = -6,
182 result_off = -5,
183 result_type_off = -4,
184 method_off = -3,
185 entry_point_off = -2,
186 parameters_off = -1,
187 rbp_off = 0,
188 retaddr_off = 1,
189 parameter_size_off = 2,
190 thread_off = 3
191 };
192 #endif // _WIN64
193
194 address StubGenerator::generate_call_stub(address& return_address) {
195
196 assert((int)frame::entry_frame_after_call_words == -(int)rsp_after_call_off + 1 &&
197 (int)frame::entry_frame_call_wrapper_offset == (int)call_wrapper_off,
198 "adjust this code");
199 StubCodeMark mark(this, "StubRoutines", "call_stub");
200 address start = __ pc();
201
202 // same as in generate_catch_exception()!
203 const Address rsp_after_call(rbp, rsp_after_call_off * wordSize);
204
205 const Address call_wrapper (rbp, call_wrapper_off * wordSize);
206 const Address result (rbp, result_off * wordSize);
207 const Address result_type (rbp, result_type_off * wordSize);
208 const Address method (rbp, method_off * wordSize);
209 const Address entry_point (rbp, entry_point_off * wordSize);
210 const Address parameters (rbp, parameters_off * wordSize);
211 const Address parameter_size(rbp, parameter_size_off * wordSize);
212
213 // same as in generate_catch_exception()!
214 const Address thread (rbp, thread_off * wordSize);
215
216 const Address r15_save(rbp, r15_off * wordSize);
217 const Address r14_save(rbp, r14_off * wordSize);
218 const Address r13_save(rbp, r13_off * wordSize);
219 const Address r12_save(rbp, r12_off * wordSize);
220 const Address rbx_save(rbp, rbx_off * wordSize);
221
222 // stub code
223 __ enter();
224 __ subptr(rsp, -rsp_after_call_off * wordSize);
225
226 // save register parameters
227 #ifndef _WIN64
228 __ movptr(parameters, c_rarg5); // parameters
229 __ movptr(entry_point, c_rarg4); // entry_point
230 #endif
231
232 __ movptr(method, c_rarg3); // method
233 __ movl(result_type, c_rarg2); // result type
234 __ movptr(result, c_rarg1); // result
235 __ movptr(call_wrapper, c_rarg0); // call wrapper
236
237 // save regs belonging to calling function
238 __ movptr(rbx_save, rbx);
239 __ movptr(r12_save, r12);
240 __ movptr(r13_save, r13);
241 __ movptr(r14_save, r14);
242 __ movptr(r15_save, r15);
243
244 #ifdef _WIN64
245 int last_reg = 15;
246 if (UseAVX > 2) {
247 last_reg = 31;
248 }
249 if (VM_Version::supports_evex()) {
250 for (int i = xmm_save_first; i <= last_reg; i++) {
251 __ vextractf32x4(xmm_save(i), as_XMMRegister(i), 0);
252 }
253 } else {
254 for (int i = xmm_save_first; i <= last_reg; i++) {
255 __ movdqu(xmm_save(i), as_XMMRegister(i));
256 }
257 }
258
259 const Address rdi_save(rbp, rdi_off * wordSize);
260 const Address rsi_save(rbp, rsi_off * wordSize);
261
262 __ movptr(rsi_save, rsi);
263 __ movptr(rdi_save, rdi);
264 #else
265 const Address mxcsr_save(rbp, mxcsr_off * wordSize);
266 {
267 Label skip_ldmx;
268 __ stmxcsr(mxcsr_save);
269 __ movl(rax, mxcsr_save);
270 __ andl(rax, 0xFFC0); // Mask out any pending exceptions (only check control and mask bits)
271 ExternalAddress mxcsr_std(StubRoutines::x86::addr_mxcsr_std());
272 __ cmp32(rax, mxcsr_std, rscratch1);
273 __ jcc(Assembler::equal, skip_ldmx);
274 __ ldmxcsr(mxcsr_std, rscratch1);
275 __ bind(skip_ldmx);
276 }
277 #endif
278
279 // Load up thread register
280 __ movptr(r15_thread, thread);
281 __ reinit_heapbase();
282
283 #ifdef ASSERT
284 // make sure we have no pending exceptions
285 {
286 Label L;
287 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
288 __ jcc(Assembler::equal, L);
289 __ stop("StubRoutines::call_stub: entered with pending exception");
290 __ bind(L);
291 }
292 #endif
293
294 // pass parameters if any
295 BLOCK_COMMENT("pass parameters if any");
296 Label parameters_done;
297 __ movl(c_rarg3, parameter_size);
298 __ testl(c_rarg3, c_rarg3);
299 __ jcc(Assembler::zero, parameters_done);
300
301 Label loop;
302 __ movptr(c_rarg2, parameters); // parameter pointer
303 __ movl(c_rarg1, c_rarg3); // parameter counter is in c_rarg1
304 __ BIND(loop);
305 __ movptr(rax, Address(c_rarg2, 0));// get parameter
306 __ addptr(c_rarg2, wordSize); // advance to next parameter
307 __ decrementl(c_rarg1); // decrement counter
308 __ push(rax); // pass parameter
309 __ jcc(Assembler::notZero, loop);
310
311 // call Java function
312 __ BIND(parameters_done);
313 __ movptr(rbx, method); // get Method*
314 __ movptr(c_rarg1, entry_point); // get entry_point
315 __ mov(r13, rsp); // set sender sp
316 BLOCK_COMMENT("call Java function");
317 __ call(c_rarg1);
318
319 BLOCK_COMMENT("call_stub_return_address:");
320 return_address = __ pc();
321
322 // store result depending on type (everything that is not
323 // T_OBJECT, T_PRIMITIVE_OBJECT, T_LONG, T_FLOAT or T_DOUBLE is treated as T_INT)
324 __ movptr(r13, result);
325 Label is_long, is_float, is_double, check_prim, exit;
326 __ movl(rbx, result_type);
327 __ cmpl(rbx, T_OBJECT);
328 __ jcc(Assembler::equal, check_prim);
329 __ cmpl(rbx, T_PRIMITIVE_OBJECT);
330 __ jcc(Assembler::equal, check_prim);
331 __ cmpl(rbx, T_LONG);
332 __ jcc(Assembler::equal, is_long);
333 __ cmpl(rbx, T_FLOAT);
334 __ jcc(Assembler::equal, is_float);
335 __ cmpl(rbx, T_DOUBLE);
336 __ jcc(Assembler::equal, is_double);
337
338 // handle T_INT case
339 __ movl(Address(r13, 0), rax);
340
341 __ BIND(exit);
342
343 // pop parameters
344 __ lea(rsp, rsp_after_call);
345
346 #ifdef ASSERT
347 // verify that threads correspond
348 {
349 Label L1, L2, L3;
350 __ cmpptr(r15_thread, thread);
351 __ jcc(Assembler::equal, L1);
352 __ stop("StubRoutines::call_stub: r15_thread is corrupted");
353 __ bind(L1);
354 __ get_thread(rbx);
355 __ cmpptr(r15_thread, thread);
356 __ jcc(Assembler::equal, L2);
357 __ stop("StubRoutines::call_stub: r15_thread is modified by call");
358 __ bind(L2);
359 __ cmpptr(r15_thread, rbx);
360 __ jcc(Assembler::equal, L3);
361 __ stop("StubRoutines::call_stub: threads must correspond");
362 __ bind(L3);
363 }
364 #endif
365
366 __ pop_cont_fastpath();
367
368 // restore regs belonging to calling function
369 #ifdef _WIN64
370 // emit the restores for xmm regs
371 if (VM_Version::supports_evex()) {
372 for (int i = xmm_save_first; i <= last_reg; i++) {
373 __ vinsertf32x4(as_XMMRegister(i), as_XMMRegister(i), xmm_save(i), 0);
374 }
375 } else {
376 for (int i = xmm_save_first; i <= last_reg; i++) {
377 __ movdqu(as_XMMRegister(i), xmm_save(i));
378 }
379 }
380 #endif
381 __ movptr(r15, r15_save);
382 __ movptr(r14, r14_save);
383 __ movptr(r13, r13_save);
384 __ movptr(r12, r12_save);
385 __ movptr(rbx, rbx_save);
386
387 #ifdef _WIN64
388 __ movptr(rdi, rdi_save);
389 __ movptr(rsi, rsi_save);
390 #else
391 __ ldmxcsr(mxcsr_save);
392 #endif
393
394 // restore rsp
395 __ addptr(rsp, -rsp_after_call_off * wordSize);
396
397 // return
398 __ vzeroupper();
399 __ pop(rbp);
400 __ ret(0);
401
402 // handle return types different from T_INT
403 __ BIND(check_prim);
404 if (InlineTypeReturnedAsFields) {
405 // Check for scalarized return value
406 __ testptr(rax, 1);
407 __ jcc(Assembler::zero, is_long);
408 // Load pack handler address
409 __ andptr(rax, -2);
410 __ movptr(rax, Address(rax, InstanceKlass::adr_inlineklass_fixed_block_offset()));
411 __ movptr(rbx, Address(rax, InlineKlass::pack_handler_jobject_offset()));
412 // Call pack handler to initialize the buffer
413 __ call(rbx);
414 __ jmp(exit);
415 }
416 __ BIND(is_long);
417 __ movq(Address(r13, 0), rax);
418 __ jmp(exit);
419
420 __ BIND(is_float);
421 __ movflt(Address(r13, 0), xmm0);
422 __ jmp(exit);
423
424 __ BIND(is_double);
425 __ movdbl(Address(r13, 0), xmm0);
426 __ jmp(exit);
427
428 return start;
429 }
430
431 // Return point for a Java call if there's an exception thrown in
432 // Java code. The exception is caught and transformed into a
433 // pending exception stored in JavaThread that can be tested from
434 // within the VM.
435 //
436 // Note: Usually the parameters are removed by the callee. In case
437 // of an exception crossing an activation frame boundary, that is
438 // not the case if the callee is compiled code => need to setup the
439 // rsp.
440 //
441 // rax: exception oop
442
443 address StubGenerator::generate_catch_exception() {
444 StubCodeMark mark(this, "StubRoutines", "catch_exception");
445 address start = __ pc();
446
447 // same as in generate_call_stub():
448 const Address rsp_after_call(rbp, rsp_after_call_off * wordSize);
449 const Address thread (rbp, thread_off * wordSize);
450
451 #ifdef ASSERT
452 // verify that threads correspond
453 {
454 Label L1, L2, L3;
455 __ cmpptr(r15_thread, thread);
456 __ jcc(Assembler::equal, L1);
457 __ stop("StubRoutines::catch_exception: r15_thread is corrupted");
458 __ bind(L1);
459 __ get_thread(rbx);
460 __ cmpptr(r15_thread, thread);
461 __ jcc(Assembler::equal, L2);
462 __ stop("StubRoutines::catch_exception: r15_thread is modified by call");
463 __ bind(L2);
464 __ cmpptr(r15_thread, rbx);
465 __ jcc(Assembler::equal, L3);
466 __ stop("StubRoutines::catch_exception: threads must correspond");
467 __ bind(L3);
468 }
469 #endif
470
471 // set pending exception
472 __ verify_oop(rax);
473
474 __ movptr(Address(r15_thread, Thread::pending_exception_offset()), rax);
475 __ lea(rscratch1, ExternalAddress((address)__FILE__));
476 __ movptr(Address(r15_thread, Thread::exception_file_offset()), rscratch1);
477 __ movl(Address(r15_thread, Thread::exception_line_offset()), (int) __LINE__);
478
479 // complete return to VM
480 assert(StubRoutines::_call_stub_return_address != NULL,
481 "_call_stub_return_address must have been generated before");
482 __ jump(RuntimeAddress(StubRoutines::_call_stub_return_address));
483
484 return start;
485 }
486
487 // Continuation point for runtime calls returning with a pending
488 // exception. The pending exception check happened in the runtime
489 // or native call stub. The pending exception in Thread is
490 // converted into a Java-level exception.
491 //
492 // Contract with Java-level exception handlers:
493 // rax: exception
494 // rdx: throwing pc
495 //
496 // NOTE: At entry of this stub, exception-pc must be on stack !!
497
498 address StubGenerator::generate_forward_exception() {
499 StubCodeMark mark(this, "StubRoutines", "forward exception");
500 address start = __ pc();
501
502 // Upon entry, the sp points to the return address returning into
503 // Java (interpreted or compiled) code; i.e., the return address
504 // becomes the throwing pc.
505 //
506 // Arguments pushed before the runtime call are still on the stack
507 // but the exception handler will reset the stack pointer ->
508 // ignore them. A potential result in registers can be ignored as
509 // well.
510
511 #ifdef ASSERT
512 // make sure this code is only executed if there is a pending exception
513 {
514 Label L;
515 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
516 __ jcc(Assembler::notEqual, L);
517 __ stop("StubRoutines::forward exception: no pending exception (1)");
518 __ bind(L);
519 }
520 #endif
521
522 // compute exception handler into rbx
523 __ movptr(c_rarg0, Address(rsp, 0));
524 BLOCK_COMMENT("call exception_handler_for_return_address");
525 __ call_VM_leaf(CAST_FROM_FN_PTR(address,
526 SharedRuntime::exception_handler_for_return_address),
527 r15_thread, c_rarg0);
528 __ mov(rbx, rax);
529
530 // setup rax & rdx, remove return address & clear pending exception
531 __ pop(rdx);
532 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset()));
533 __ movptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
534
535 #ifdef ASSERT
536 // make sure exception is set
537 {
538 Label L;
539 __ testptr(rax, rax);
540 __ jcc(Assembler::notEqual, L);
541 __ stop("StubRoutines::forward exception: no pending exception (2)");
542 __ bind(L);
543 }
544 #endif
545
546 // continue at exception handler (return address removed)
547 // rax: exception
548 // rbx: exception handler
549 // rdx: throwing pc
550 __ verify_oop(rax);
551 __ jmp(rbx);
552
553 return start;
554 }
555
556 // Support for intptr_t OrderAccess::fence()
557 //
558 // Arguments :
559 //
560 // Result:
561 address StubGenerator::generate_orderaccess_fence() {
562 StubCodeMark mark(this, "StubRoutines", "orderaccess_fence");
563 address start = __ pc();
564
565 __ membar(Assembler::StoreLoad);
566 __ ret(0);
567
568 return start;
569 }
570
571
572 // Support for intptr_t get_previous_sp()
573 //
574 // This routine is used to find the previous stack pointer for the
575 // caller.
576 address StubGenerator::generate_get_previous_sp() {
577 StubCodeMark mark(this, "StubRoutines", "get_previous_sp");
578 address start = __ pc();
579
580 __ movptr(rax, rsp);
581 __ addptr(rax, 8); // return address is at the top of the stack.
582 __ ret(0);
583
584 return start;
585 }
586
587 //----------------------------------------------------------------------------------------------------
588 // Support for void verify_mxcsr()
589 //
590 // This routine is used with -Xcheck:jni to verify that native
591 // JNI code does not return to Java code without restoring the
592 // MXCSR register to our expected state.
593
594 address StubGenerator::generate_verify_mxcsr() {
595 StubCodeMark mark(this, "StubRoutines", "verify_mxcsr");
596 address start = __ pc();
597
598 const Address mxcsr_save(rsp, 0);
599
600 if (CheckJNICalls) {
601 Label ok_ret;
602 ExternalAddress mxcsr_std(StubRoutines::x86::addr_mxcsr_std());
603 __ push(rax);
604 __ subptr(rsp, wordSize); // allocate a temp location
605 __ stmxcsr(mxcsr_save);
606 __ movl(rax, mxcsr_save);
607 __ andl(rax, 0xFFC0); // Mask out any pending exceptions (only check control and mask bits)
608 __ cmp32(rax, mxcsr_std, rscratch1);
609 __ jcc(Assembler::equal, ok_ret);
610
611 __ warn("MXCSR changed by native JNI code, use -XX:+RestoreMXCSROnJNICall");
612
613 __ ldmxcsr(mxcsr_std, rscratch1);
614
615 __ bind(ok_ret);
616 __ addptr(rsp, wordSize);
617 __ pop(rax);
618 }
619
620 __ ret(0);
621
622 return start;
623 }
624
625 address StubGenerator::generate_f2i_fixup() {
626 StubCodeMark mark(this, "StubRoutines", "f2i_fixup");
627 Address inout(rsp, 5 * wordSize); // return address + 4 saves
628
629 address start = __ pc();
630
631 Label L;
632
633 __ push(rax);
634 __ push(c_rarg3);
635 __ push(c_rarg2);
636 __ push(c_rarg1);
637
638 __ movl(rax, 0x7f800000);
639 __ xorl(c_rarg3, c_rarg3);
640 __ movl(c_rarg2, inout);
641 __ movl(c_rarg1, c_rarg2);
642 __ andl(c_rarg1, 0x7fffffff);
643 __ cmpl(rax, c_rarg1); // NaN? -> 0
644 __ jcc(Assembler::negative, L);
645 __ testl(c_rarg2, c_rarg2); // signed ? min_jint : max_jint
646 __ movl(c_rarg3, 0x80000000);
647 __ movl(rax, 0x7fffffff);
648 __ cmovl(Assembler::positive, c_rarg3, rax);
649
650 __ bind(L);
651 __ movptr(inout, c_rarg3);
652
653 __ pop(c_rarg1);
654 __ pop(c_rarg2);
655 __ pop(c_rarg3);
656 __ pop(rax);
657
658 __ ret(0);
659
660 return start;
661 }
662
663 address StubGenerator::generate_f2l_fixup() {
664 StubCodeMark mark(this, "StubRoutines", "f2l_fixup");
665 Address inout(rsp, 5 * wordSize); // return address + 4 saves
666 address start = __ pc();
667
668 Label L;
669
670 __ push(rax);
671 __ push(c_rarg3);
672 __ push(c_rarg2);
673 __ push(c_rarg1);
674
675 __ movl(rax, 0x7f800000);
676 __ xorl(c_rarg3, c_rarg3);
677 __ movl(c_rarg2, inout);
678 __ movl(c_rarg1, c_rarg2);
679 __ andl(c_rarg1, 0x7fffffff);
680 __ cmpl(rax, c_rarg1); // NaN? -> 0
681 __ jcc(Assembler::negative, L);
682 __ testl(c_rarg2, c_rarg2); // signed ? min_jlong : max_jlong
683 __ mov64(c_rarg3, 0x8000000000000000);
684 __ mov64(rax, 0x7fffffffffffffff);
685 __ cmov(Assembler::positive, c_rarg3, rax);
686
687 __ bind(L);
688 __ movptr(inout, c_rarg3);
689
690 __ pop(c_rarg1);
691 __ pop(c_rarg2);
692 __ pop(c_rarg3);
693 __ pop(rax);
694
695 __ ret(0);
696
697 return start;
698 }
699
700 address StubGenerator::generate_d2i_fixup() {
701 StubCodeMark mark(this, "StubRoutines", "d2i_fixup");
702 Address inout(rsp, 6 * wordSize); // return address + 5 saves
703
704 address start = __ pc();
705
706 Label L;
707
708 __ push(rax);
709 __ push(c_rarg3);
710 __ push(c_rarg2);
711 __ push(c_rarg1);
712 __ push(c_rarg0);
713
714 __ movl(rax, 0x7ff00000);
715 __ movq(c_rarg2, inout);
716 __ movl(c_rarg3, c_rarg2);
717 __ mov(c_rarg1, c_rarg2);
718 __ mov(c_rarg0, c_rarg2);
719 __ negl(c_rarg3);
720 __ shrptr(c_rarg1, 0x20);
721 __ orl(c_rarg3, c_rarg2);
722 __ andl(c_rarg1, 0x7fffffff);
723 __ xorl(c_rarg2, c_rarg2);
724 __ shrl(c_rarg3, 0x1f);
725 __ orl(c_rarg1, c_rarg3);
726 __ cmpl(rax, c_rarg1);
727 __ jcc(Assembler::negative, L); // NaN -> 0
728 __ testptr(c_rarg0, c_rarg0); // signed ? min_jint : max_jint
729 __ movl(c_rarg2, 0x80000000);
730 __ movl(rax, 0x7fffffff);
731 __ cmov(Assembler::positive, c_rarg2, rax);
732
733 __ bind(L);
734 __ movptr(inout, c_rarg2);
735
736 __ pop(c_rarg0);
737 __ pop(c_rarg1);
738 __ pop(c_rarg2);
739 __ pop(c_rarg3);
740 __ pop(rax);
741
742 __ ret(0);
743
744 return start;
745 }
746
747 address StubGenerator::generate_d2l_fixup() {
748 StubCodeMark mark(this, "StubRoutines", "d2l_fixup");
749 Address inout(rsp, 6 * wordSize); // return address + 5 saves
750
751 address start = __ pc();
752
753 Label L;
754
755 __ push(rax);
756 __ push(c_rarg3);
757 __ push(c_rarg2);
758 __ push(c_rarg1);
759 __ push(c_rarg0);
760
761 __ movl(rax, 0x7ff00000);
762 __ movq(c_rarg2, inout);
763 __ movl(c_rarg3, c_rarg2);
764 __ mov(c_rarg1, c_rarg2);
765 __ mov(c_rarg0, c_rarg2);
766 __ negl(c_rarg3);
767 __ shrptr(c_rarg1, 0x20);
768 __ orl(c_rarg3, c_rarg2);
769 __ andl(c_rarg1, 0x7fffffff);
770 __ xorl(c_rarg2, c_rarg2);
771 __ shrl(c_rarg3, 0x1f);
772 __ orl(c_rarg1, c_rarg3);
773 __ cmpl(rax, c_rarg1);
774 __ jcc(Assembler::negative, L); // NaN -> 0
775 __ testq(c_rarg0, c_rarg0); // signed ? min_jlong : max_jlong
776 __ mov64(c_rarg2, 0x8000000000000000);
777 __ mov64(rax, 0x7fffffffffffffff);
778 __ cmovq(Assembler::positive, c_rarg2, rax);
779
780 __ bind(L);
781 __ movq(inout, c_rarg2);
782
783 __ pop(c_rarg0);
784 __ pop(c_rarg1);
785 __ pop(c_rarg2);
786 __ pop(c_rarg3);
787 __ pop(rax);
788
789 __ ret(0);
790
791 return start;
792 }
793
794 address StubGenerator::generate_count_leading_zeros_lut(const char *stub_name) {
795 __ align64();
796 StubCodeMark mark(this, "StubRoutines", stub_name);
797 address start = __ pc();
798
799 __ emit_data64(0x0101010102020304, relocInfo::none);
800 __ emit_data64(0x0000000000000000, relocInfo::none);
801 __ emit_data64(0x0101010102020304, relocInfo::none);
802 __ emit_data64(0x0000000000000000, relocInfo::none);
803 __ emit_data64(0x0101010102020304, relocInfo::none);
804 __ emit_data64(0x0000000000000000, relocInfo::none);
805 __ emit_data64(0x0101010102020304, relocInfo::none);
806 __ emit_data64(0x0000000000000000, relocInfo::none);
807
808 return start;
809 }
810
811 address StubGenerator::generate_popcount_avx_lut(const char *stub_name) {
812 __ align64();
813 StubCodeMark mark(this, "StubRoutines", stub_name);
814 address start = __ pc();
815
816 __ emit_data64(0x0302020102010100, relocInfo::none);
817 __ emit_data64(0x0403030203020201, relocInfo::none);
818 __ emit_data64(0x0302020102010100, relocInfo::none);
819 __ emit_data64(0x0403030203020201, relocInfo::none);
820 __ emit_data64(0x0302020102010100, relocInfo::none);
821 __ emit_data64(0x0403030203020201, relocInfo::none);
822 __ emit_data64(0x0302020102010100, relocInfo::none);
823 __ emit_data64(0x0403030203020201, relocInfo::none);
824
825 return start;
826 }
827
828 address StubGenerator::generate_iota_indices(const char *stub_name) {
829 __ align(CodeEntryAlignment);
830 StubCodeMark mark(this, "StubRoutines", stub_name);
831 address start = __ pc();
832
833 __ emit_data64(0x0706050403020100, relocInfo::none);
834 __ emit_data64(0x0F0E0D0C0B0A0908, relocInfo::none);
835 __ emit_data64(0x1716151413121110, relocInfo::none);
836 __ emit_data64(0x1F1E1D1C1B1A1918, relocInfo::none);
837 __ emit_data64(0x2726252423222120, relocInfo::none);
838 __ emit_data64(0x2F2E2D2C2B2A2928, relocInfo::none);
839 __ emit_data64(0x3736353433323130, relocInfo::none);
840 __ emit_data64(0x3F3E3D3C3B3A3938, relocInfo::none);
841
842 return start;
843 }
844
845 address StubGenerator::generate_vector_reverse_bit_lut(const char *stub_name) {
846 __ align(CodeEntryAlignment);
847 StubCodeMark mark(this, "StubRoutines", stub_name);
848 address start = __ pc();
849
850 __ emit_data64(0x0E060A020C040800, relocInfo::none);
851 __ emit_data64(0x0F070B030D050901, relocInfo::none);
852 __ emit_data64(0x0E060A020C040800, relocInfo::none);
853 __ emit_data64(0x0F070B030D050901, relocInfo::none);
854 __ emit_data64(0x0E060A020C040800, relocInfo::none);
855 __ emit_data64(0x0F070B030D050901, relocInfo::none);
856 __ emit_data64(0x0E060A020C040800, relocInfo::none);
857 __ emit_data64(0x0F070B030D050901, relocInfo::none);
858
859 return start;
860 }
861
862 address StubGenerator::generate_vector_reverse_byte_perm_mask_long(const char *stub_name) {
863 __ align(CodeEntryAlignment);
864 StubCodeMark mark(this, "StubRoutines", stub_name);
865 address start = __ pc();
866
867 __ emit_data64(0x0001020304050607, relocInfo::none);
868 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
869 __ emit_data64(0x0001020304050607, relocInfo::none);
870 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
871 __ emit_data64(0x0001020304050607, relocInfo::none);
872 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
873 __ emit_data64(0x0001020304050607, relocInfo::none);
874 __ emit_data64(0x08090A0B0C0D0E0F, relocInfo::none);
875
876 return start;
877 }
878
879 address StubGenerator::generate_vector_reverse_byte_perm_mask_int(const char *stub_name) {
880 __ align(CodeEntryAlignment);
881 StubCodeMark mark(this, "StubRoutines", stub_name);
882 address start = __ pc();
883
884 __ emit_data64(0x0405060700010203, relocInfo::none);
885 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
886 __ emit_data64(0x0405060700010203, relocInfo::none);
887 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
888 __ emit_data64(0x0405060700010203, relocInfo::none);
889 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
890 __ emit_data64(0x0405060700010203, relocInfo::none);
891 __ emit_data64(0x0C0D0E0F08090A0B, relocInfo::none);
892
893 return start;
894 }
895
896 address StubGenerator::generate_vector_reverse_byte_perm_mask_short(const char *stub_name) {
897 __ align(CodeEntryAlignment);
898 StubCodeMark mark(this, "StubRoutines", stub_name);
899 address start = __ pc();
900
901 __ emit_data64(0x0607040502030001, relocInfo::none);
902 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
903 __ emit_data64(0x0607040502030001, relocInfo::none);
904 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
905 __ emit_data64(0x0607040502030001, relocInfo::none);
906 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
907 __ emit_data64(0x0607040502030001, relocInfo::none);
908 __ emit_data64(0x0E0F0C0D0A0B0809, relocInfo::none);
909
910 return start;
911 }
912
913 address StubGenerator::generate_vector_byte_shuffle_mask(const char *stub_name) {
914 __ align(CodeEntryAlignment);
915 StubCodeMark mark(this, "StubRoutines", stub_name);
916 address start = __ pc();
917
918 __ emit_data64(0x7070707070707070, relocInfo::none);
919 __ emit_data64(0x7070707070707070, relocInfo::none);
920 __ emit_data64(0xF0F0F0F0F0F0F0F0, relocInfo::none);
921 __ emit_data64(0xF0F0F0F0F0F0F0F0, relocInfo::none);
922
923 return start;
924 }
925
926 address StubGenerator::generate_fp_mask(const char *stub_name, int64_t mask) {
927 __ align(CodeEntryAlignment);
928 StubCodeMark mark(this, "StubRoutines", stub_name);
929 address start = __ pc();
930
931 __ emit_data64( mask, relocInfo::none );
932 __ emit_data64( mask, relocInfo::none );
933
934 return start;
935 }
936
937 address StubGenerator::generate_vector_mask(const char *stub_name, int64_t mask) {
938 __ align(CodeEntryAlignment);
939 StubCodeMark mark(this, "StubRoutines", stub_name);
940 address start = __ pc();
941
942 __ emit_data64(mask, relocInfo::none);
943 __ emit_data64(mask, relocInfo::none);
944 __ emit_data64(mask, relocInfo::none);
945 __ emit_data64(mask, relocInfo::none);
946 __ emit_data64(mask, relocInfo::none);
947 __ emit_data64(mask, relocInfo::none);
948 __ emit_data64(mask, relocInfo::none);
949 __ emit_data64(mask, relocInfo::none);
950
951 return start;
952 }
953
954 address StubGenerator::generate_vector_byte_perm_mask(const char *stub_name) {
955 __ align(CodeEntryAlignment);
956 StubCodeMark mark(this, "StubRoutines", stub_name);
957 address start = __ pc();
958
959 __ emit_data64(0x0000000000000001, relocInfo::none);
960 __ emit_data64(0x0000000000000003, relocInfo::none);
961 __ emit_data64(0x0000000000000005, relocInfo::none);
962 __ emit_data64(0x0000000000000007, relocInfo::none);
963 __ emit_data64(0x0000000000000000, relocInfo::none);
964 __ emit_data64(0x0000000000000002, relocInfo::none);
965 __ emit_data64(0x0000000000000004, relocInfo::none);
966 __ emit_data64(0x0000000000000006, relocInfo::none);
967
968 return start;
969 }
970
971 address StubGenerator::generate_vector_fp_mask(const char *stub_name, int64_t mask) {
972 __ align(CodeEntryAlignment);
973 StubCodeMark mark(this, "StubRoutines", stub_name);
974 address start = __ pc();
975
976 __ emit_data64(mask, relocInfo::none);
977 __ emit_data64(mask, relocInfo::none);
978 __ emit_data64(mask, relocInfo::none);
979 __ emit_data64(mask, relocInfo::none);
980 __ emit_data64(mask, relocInfo::none);
981 __ emit_data64(mask, relocInfo::none);
982 __ emit_data64(mask, relocInfo::none);
983 __ emit_data64(mask, relocInfo::none);
984
985 return start;
986 }
987
988 address StubGenerator::generate_vector_custom_i32(const char *stub_name, Assembler::AvxVectorLen len,
989 int32_t val0, int32_t val1, int32_t val2, int32_t val3,
990 int32_t val4, int32_t val5, int32_t val6, int32_t val7,
991 int32_t val8, int32_t val9, int32_t val10, int32_t val11,
992 int32_t val12, int32_t val13, int32_t val14, int32_t val15) {
993 __ align(CodeEntryAlignment);
994 StubCodeMark mark(this, "StubRoutines", stub_name);
995 address start = __ pc();
996
997 assert(len != Assembler::AVX_NoVec, "vector len must be specified");
998 __ emit_data(val0, relocInfo::none, 0);
999 __ emit_data(val1, relocInfo::none, 0);
1000 __ emit_data(val2, relocInfo::none, 0);
1001 __ emit_data(val3, relocInfo::none, 0);
1002 if (len >= Assembler::AVX_256bit) {
1003 __ emit_data(val4, relocInfo::none, 0);
1004 __ emit_data(val5, relocInfo::none, 0);
1005 __ emit_data(val6, relocInfo::none, 0);
1006 __ emit_data(val7, relocInfo::none, 0);
1007 if (len >= Assembler::AVX_512bit) {
1008 __ emit_data(val8, relocInfo::none, 0);
1009 __ emit_data(val9, relocInfo::none, 0);
1010 __ emit_data(val10, relocInfo::none, 0);
1011 __ emit_data(val11, relocInfo::none, 0);
1012 __ emit_data(val12, relocInfo::none, 0);
1013 __ emit_data(val13, relocInfo::none, 0);
1014 __ emit_data(val14, relocInfo::none, 0);
1015 __ emit_data(val15, relocInfo::none, 0);
1016 }
1017 }
1018 return start;
1019 }
1020
1021 // Non-destructive plausibility checks for oops
1022 //
1023 // Arguments:
1024 // all args on stack!
1025 //
1026 // Stack after saving c_rarg3:
1027 // [tos + 0]: saved c_rarg3
1028 // [tos + 1]: saved c_rarg2
1029 // [tos + 2]: saved r12 (several TemplateTable methods use it)
1030 // [tos + 3]: saved flags
1031 // [tos + 4]: return address
1032 // * [tos + 5]: error message (char*)
1033 // * [tos + 6]: object to verify (oop)
1034 // * [tos + 7]: saved rax - saved by caller and bashed
1035 // * [tos + 8]: saved r10 (rscratch1) - saved by caller
1036 // * = popped on exit
1037 address StubGenerator::generate_verify_oop() {
1038 StubCodeMark mark(this, "StubRoutines", "verify_oop");
1039 address start = __ pc();
1040
1041 Label exit, error;
1042
1043 __ pushf();
1044 __ incrementl(ExternalAddress((address) StubRoutines::verify_oop_count_addr()), rscratch1);
1045
1046 __ push(r12);
1047
1048 // save c_rarg2 and c_rarg3
1049 __ push(c_rarg2);
1050 __ push(c_rarg3);
1051
1052 enum {
1053 // After previous pushes.
1054 oop_to_verify = 6 * wordSize,
1055 saved_rax = 7 * wordSize,
1056 saved_r10 = 8 * wordSize,
1057
1058 // Before the call to MacroAssembler::debug(), see below.
1059 return_addr = 16 * wordSize,
1060 error_msg = 17 * wordSize
1061 };
1062
1063 // get object
1064 __ movptr(rax, Address(rsp, oop_to_verify));
1065
1066 // make sure object is 'reasonable'
1067 __ testptr(rax, rax);
1068 __ jcc(Assembler::zero, exit); // if obj is NULL it is OK
1069
1070 #if INCLUDE_ZGC
1071 if (UseZGC) {
1072 // Check if metadata bits indicate a bad oop
1073 __ testptr(rax, Address(r15_thread, ZThreadLocalData::address_bad_mask_offset()));
1074 __ jcc(Assembler::notZero, error);
1075 }
1076 #endif
1077
1078 // Check if the oop is in the right area of memory
1079 __ movptr(c_rarg2, rax);
1080 __ movptr(c_rarg3, (intptr_t) Universe::verify_oop_mask());
1081 __ andptr(c_rarg2, c_rarg3);
1082 __ movptr(c_rarg3, (intptr_t) Universe::verify_oop_bits());
1083 __ cmpptr(c_rarg2, c_rarg3);
1084 __ jcc(Assembler::notZero, error);
1085
1086 // make sure klass is 'reasonable', which is not zero.
1087 __ load_klass(rax, rax, rscratch1); // get klass
1088 __ testptr(rax, rax);
1089 __ jcc(Assembler::zero, error); // if klass is NULL it is broken
1090
1091 // return if everything seems ok
1092 __ bind(exit);
1093 __ movptr(rax, Address(rsp, saved_rax)); // get saved rax back
1094 __ movptr(rscratch1, Address(rsp, saved_r10)); // get saved r10 back
1095 __ pop(c_rarg3); // restore c_rarg3
1096 __ pop(c_rarg2); // restore c_rarg2
1097 __ pop(r12); // restore r12
1098 __ popf(); // restore flags
1099 __ ret(4 * wordSize); // pop caller saved stuff
1100
1101 // handle errors
1102 __ bind(error);
1103 __ movptr(rax, Address(rsp, saved_rax)); // get saved rax back
1104 __ movptr(rscratch1, Address(rsp, saved_r10)); // get saved r10 back
1105 __ pop(c_rarg3); // get saved c_rarg3 back
1106 __ pop(c_rarg2); // get saved c_rarg2 back
1107 __ pop(r12); // get saved r12 back
1108 __ popf(); // get saved flags off stack --
1109 // will be ignored
1110
1111 __ pusha(); // push registers
1112 // (rip is already
1113 // already pushed)
1114 // debug(char* msg, int64_t pc, int64_t regs[])
1115 // We've popped the registers we'd saved (c_rarg3, c_rarg2 and flags), and
1116 // pushed all the registers, so now the stack looks like:
1117 // [tos + 0] 16 saved registers
1118 // [tos + 16] return address
1119 // * [tos + 17] error message (char*)
1120 // * [tos + 18] object to verify (oop)
1121 // * [tos + 19] saved rax - saved by caller and bashed
1122 // * [tos + 20] saved r10 (rscratch1) - saved by caller
1123 // * = popped on exit
1124
1125 __ movptr(c_rarg0, Address(rsp, error_msg)); // pass address of error message
1126 __ movptr(c_rarg1, Address(rsp, return_addr)); // pass return address
1127 __ movq(c_rarg2, rsp); // pass address of regs on stack
1128 __ mov(r12, rsp); // remember rsp
1129 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1130 __ andptr(rsp, -16); // align stack as required by ABI
1131 BLOCK_COMMENT("call MacroAssembler::debug");
1132 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64)));
1133 __ hlt();
1134
1135 return start;
1136 }
1137
1138
1139 // Shuffle first three arg regs on Windows into Linux/Solaris locations.
1140 //
1141 // Outputs:
1142 // rdi - rcx
1143 // rsi - rdx
1144 // rdx - r8
1145 // rcx - r9
1146 //
1147 // Registers r9 and r10 are used to save rdi and rsi on Windows, which latter
1148 // are non-volatile. r9 and r10 should not be used by the caller.
1149 //
1150 void StubGenerator::setup_arg_regs(int nargs) {
1151 const Register saved_rdi = r9;
1152 const Register saved_rsi = r10;
1153 assert(nargs == 3 || nargs == 4, "else fix");
1154 #ifdef _WIN64
1155 assert(c_rarg0 == rcx && c_rarg1 == rdx && c_rarg2 == r8 && c_rarg3 == r9,
1156 "unexpected argument registers");
1157 if (nargs >= 4)
1158 __ mov(rax, r9); // r9 is also saved_rdi
1159 __ movptr(saved_rdi, rdi);
1160 __ movptr(saved_rsi, rsi);
1161 __ mov(rdi, rcx); // c_rarg0
1162 __ mov(rsi, rdx); // c_rarg1
1163 __ mov(rdx, r8); // c_rarg2
1164 if (nargs >= 4)
1165 __ mov(rcx, rax); // c_rarg3 (via rax)
1166 #else
1167 assert(c_rarg0 == rdi && c_rarg1 == rsi && c_rarg2 == rdx && c_rarg3 == rcx,
1168 "unexpected argument registers");
1169 #endif
1170 DEBUG_ONLY(_regs_in_thread = false;)
1171 }
1172
1173
1174 void StubGenerator::restore_arg_regs() {
1175 assert(!_regs_in_thread, "wrong call to restore_arg_regs");
1176 const Register saved_rdi = r9;
1177 const Register saved_rsi = r10;
1178 #ifdef _WIN64
1179 __ movptr(rdi, saved_rdi);
1180 __ movptr(rsi, saved_rsi);
1181 #endif
1182 }
1183
1184
1185 // This is used in places where r10 is a scratch register, and can
1186 // be adapted if r9 is needed also.
1187 void StubGenerator::setup_arg_regs_using_thread() {
1188 const Register saved_r15 = r9;
1189 #ifdef _WIN64
1190 __ mov(saved_r15, r15); // r15 is callee saved and needs to be restored
1191 __ get_thread(r15_thread);
1192 assert(c_rarg0 == rcx && c_rarg1 == rdx && c_rarg2 == r8 && c_rarg3 == r9,
1193 "unexpected argument registers");
1194 __ movptr(Address(r15_thread, in_bytes(JavaThread::windows_saved_rdi_offset())), rdi);
1195 __ movptr(Address(r15_thread, in_bytes(JavaThread::windows_saved_rsi_offset())), rsi);
1196
1197 __ mov(rdi, rcx); // c_rarg0
1198 __ mov(rsi, rdx); // c_rarg1
1199 __ mov(rdx, r8); // c_rarg2
1200 #else
1201 assert(c_rarg0 == rdi && c_rarg1 == rsi && c_rarg2 == rdx && c_rarg3 == rcx,
1202 "unexpected argument registers");
1203 #endif
1204 DEBUG_ONLY(_regs_in_thread = true;)
1205 }
1206
1207
1208 void StubGenerator::restore_arg_regs_using_thread() {
1209 assert(_regs_in_thread, "wrong call to restore_arg_regs");
1210 const Register saved_r15 = r9;
1211 #ifdef _WIN64
1212 __ get_thread(r15_thread);
1213 __ movptr(rsi, Address(r15_thread, in_bytes(JavaThread::windows_saved_rsi_offset())));
1214 __ movptr(rdi, Address(r15_thread, in_bytes(JavaThread::windows_saved_rdi_offset())));
1215 __ mov(r15, saved_r15); // r15 is callee saved and needs to be restored
1216 #endif
1217 }
1218
1219
1220 void StubGenerator::setup_argument_regs(BasicType type) {
1221 if (type == T_BYTE || type == T_SHORT) {
1222 setup_arg_regs(); // from => rdi, to => rsi, count => rdx
1223 // r9 and r10 may be used to save non-volatile registers
1224 } else {
1225 setup_arg_regs_using_thread(); // from => rdi, to => rsi, count => rdx
1226 // r9 is used to save r15_thread
1227 }
1228 }
1229
1230
1231 void StubGenerator::restore_argument_regs(BasicType type) {
1232 if (type == T_BYTE || type == T_SHORT) {
1233 restore_arg_regs();
1234 } else {
1235 restore_arg_regs_using_thread();
1236 }
1237 }
1238
1239 address StubGenerator::generate_data_cache_writeback() {
1240 const Register src = c_rarg0; // source address
1241
1242 __ align(CodeEntryAlignment);
1243
1244 StubCodeMark mark(this, "StubRoutines", "_data_cache_writeback");
1245
1246 address start = __ pc();
1247
1248 __ enter();
1249 __ cache_wb(Address(src, 0));
1250 __ leave();
1251 __ ret(0);
1252
1253 return start;
1254 }
1255
1256 address StubGenerator::generate_data_cache_writeback_sync() {
1257 const Register is_pre = c_rarg0; // pre or post sync
1258
1259 __ align(CodeEntryAlignment);
1260
1261 StubCodeMark mark(this, "StubRoutines", "_data_cache_writeback_sync");
1262
1263 // pre wbsync is a no-op
1264 // post wbsync translates to an sfence
1265
1266 Label skip;
1267 address start = __ pc();
1268
1269 __ enter();
1270 __ cmpl(is_pre, 0);
1271 __ jcc(Assembler::notEqual, skip);
1272 __ cache_wbsync(false);
1273 __ bind(skip);
1274 __ leave();
1275 __ ret(0);
1276
1277 return start;
1278 }
1279
1280 // ofs and limit are use for multi-block byte array.
1281 // int com.sun.security.provider.MD5.implCompress(byte[] b, int ofs)
1282 address StubGenerator::generate_md5_implCompress(bool multi_block, const char *name) {
1283 __ align(CodeEntryAlignment);
1284 StubCodeMark mark(this, "StubRoutines", name);
1285 address start = __ pc();
1286
1287 const Register buf_param = r15;
1288 const Address state_param(rsp, 0 * wordSize);
1289 const Address ofs_param (rsp, 1 * wordSize );
1290 const Address limit_param(rsp, 1 * wordSize + 4);
1291
1292 __ enter();
1293 __ push(rbx);
1294 __ push(rdi);
1295 __ push(rsi);
1296 __ push(r15);
1297 __ subptr(rsp, 2 * wordSize);
1298
1299 __ movptr(buf_param, c_rarg0);
1300 __ movptr(state_param, c_rarg1);
1301 if (multi_block) {
1302 __ movl(ofs_param, c_rarg2);
1303 __ movl(limit_param, c_rarg3);
1304 }
1305 __ fast_md5(buf_param, state_param, ofs_param, limit_param, multi_block);
1306
1307 __ addptr(rsp, 2 * wordSize);
1308 __ pop(r15);
1309 __ pop(rsi);
1310 __ pop(rdi);
1311 __ pop(rbx);
1312 __ leave();
1313 __ ret(0);
1314
1315 return start;
1316 }
1317
1318 address StubGenerator::generate_upper_word_mask() {
1319 __ align64();
1320 StubCodeMark mark(this, "StubRoutines", "upper_word_mask");
1321 address start = __ pc();
1322
1323 __ emit_data64(0x0000000000000000, relocInfo::none);
1324 __ emit_data64(0xFFFFFFFF00000000, relocInfo::none);
1325
1326 return start;
1327 }
1328
1329 address StubGenerator::generate_shuffle_byte_flip_mask() {
1330 __ align64();
1331 StubCodeMark mark(this, "StubRoutines", "shuffle_byte_flip_mask");
1332 address start = __ pc();
1333
1334 __ emit_data64(0x08090a0b0c0d0e0f, relocInfo::none);
1335 __ emit_data64(0x0001020304050607, relocInfo::none);
1336
1337 return start;
1338 }
1339
1340 // ofs and limit are use for multi-block byte array.
1341 // int com.sun.security.provider.DigestBase.implCompressMultiBlock(byte[] b, int ofs, int limit)
1342 address StubGenerator::generate_sha1_implCompress(bool multi_block, const char *name) {
1343 __ align(CodeEntryAlignment);
1344 StubCodeMark mark(this, "StubRoutines", name);
1345 address start = __ pc();
1346
1347 Register buf = c_rarg0;
1348 Register state = c_rarg1;
1349 Register ofs = c_rarg2;
1350 Register limit = c_rarg3;
1351
1352 const XMMRegister abcd = xmm0;
1353 const XMMRegister e0 = xmm1;
1354 const XMMRegister e1 = xmm2;
1355 const XMMRegister msg0 = xmm3;
1356
1357 const XMMRegister msg1 = xmm4;
1358 const XMMRegister msg2 = xmm5;
1359 const XMMRegister msg3 = xmm6;
1360 const XMMRegister shuf_mask = xmm7;
1361
1362 __ enter();
1363
1364 __ subptr(rsp, 4 * wordSize);
1365
1366 __ fast_sha1(abcd, e0, e1, msg0, msg1, msg2, msg3, shuf_mask,
1367 buf, state, ofs, limit, rsp, multi_block);
1368
1369 __ addptr(rsp, 4 * wordSize);
1370
1371 __ leave();
1372 __ ret(0);
1373
1374 return start;
1375 }
1376
1377 address StubGenerator::generate_pshuffle_byte_flip_mask() {
1378 __ align64();
1379 StubCodeMark mark(this, "StubRoutines", "pshuffle_byte_flip_mask");
1380 address start = __ pc();
1381
1382 __ emit_data64(0x0405060700010203, relocInfo::none);
1383 __ emit_data64(0x0c0d0e0f08090a0b, relocInfo::none);
1384
1385 if (VM_Version::supports_avx2()) {
1386 __ emit_data64(0x0405060700010203, relocInfo::none); // second copy
1387 __ emit_data64(0x0c0d0e0f08090a0b, relocInfo::none);
1388 // _SHUF_00BA
1389 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1390 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1391 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1392 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1393 // _SHUF_DC00
1394 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1395 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1396 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1397 __ emit_data64(0x0b0a090803020100, relocInfo::none);
1398 }
1399
1400 return start;
1401 }
1402
1403 //Mask for byte-swapping a couple of qwords in an XMM register using (v)pshufb.
1404 address StubGenerator::generate_pshuffle_byte_flip_mask_sha512() {
1405 __ align32();
1406 StubCodeMark mark(this, "StubRoutines", "pshuffle_byte_flip_mask_sha512");
1407 address start = __ pc();
1408
1409 if (VM_Version::supports_avx2()) {
1410 __ emit_data64(0x0001020304050607, relocInfo::none); // PSHUFFLE_BYTE_FLIP_MASK
1411 __ emit_data64(0x08090a0b0c0d0e0f, relocInfo::none);
1412 __ emit_data64(0x1011121314151617, relocInfo::none);
1413 __ emit_data64(0x18191a1b1c1d1e1f, relocInfo::none);
1414 __ emit_data64(0x0000000000000000, relocInfo::none); //MASK_YMM_LO
1415 __ emit_data64(0x0000000000000000, relocInfo::none);
1416 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1417 __ emit_data64(0xFFFFFFFFFFFFFFFF, relocInfo::none);
1418 }
1419
1420 return start;
1421 }
1422
1423 // ofs and limit are use for multi-block byte array.
1424 // int com.sun.security.provider.DigestBase.implCompressMultiBlock(byte[] b, int ofs, int limit)
1425 address StubGenerator::generate_sha256_implCompress(bool multi_block, const char *name) {
1426 assert(VM_Version::supports_sha() || VM_Version::supports_avx2(), "");
1427 __ align(CodeEntryAlignment);
1428 StubCodeMark mark(this, "StubRoutines", name);
1429 address start = __ pc();
1430
1431 Register buf = c_rarg0;
1432 Register state = c_rarg1;
1433 Register ofs = c_rarg2;
1434 Register limit = c_rarg3;
1435
1436 const XMMRegister msg = xmm0;
1437 const XMMRegister state0 = xmm1;
1438 const XMMRegister state1 = xmm2;
1439 const XMMRegister msgtmp0 = xmm3;
1440
1441 const XMMRegister msgtmp1 = xmm4;
1442 const XMMRegister msgtmp2 = xmm5;
1443 const XMMRegister msgtmp3 = xmm6;
1444 const XMMRegister msgtmp4 = xmm7;
1445
1446 const XMMRegister shuf_mask = xmm8;
1447
1448 __ enter();
1449
1450 __ subptr(rsp, 4 * wordSize);
1451
1452 if (VM_Version::supports_sha()) {
1453 __ fast_sha256(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
1454 buf, state, ofs, limit, rsp, multi_block, shuf_mask);
1455 } else if (VM_Version::supports_avx2()) {
1456 __ sha256_AVX2(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
1457 buf, state, ofs, limit, rsp, multi_block, shuf_mask);
1458 }
1459 __ addptr(rsp, 4 * wordSize);
1460 __ vzeroupper();
1461 __ leave();
1462 __ ret(0);
1463
1464 return start;
1465 }
1466
1467 address StubGenerator::generate_sha512_implCompress(bool multi_block, const char *name) {
1468 assert(VM_Version::supports_avx2(), "");
1469 assert(VM_Version::supports_bmi2(), "");
1470 __ align(CodeEntryAlignment);
1471 StubCodeMark mark(this, "StubRoutines", name);
1472 address start = __ pc();
1473
1474 Register buf = c_rarg0;
1475 Register state = c_rarg1;
1476 Register ofs = c_rarg2;
1477 Register limit = c_rarg3;
1478
1479 const XMMRegister msg = xmm0;
1480 const XMMRegister state0 = xmm1;
1481 const XMMRegister state1 = xmm2;
1482 const XMMRegister msgtmp0 = xmm3;
1483 const XMMRegister msgtmp1 = xmm4;
1484 const XMMRegister msgtmp2 = xmm5;
1485 const XMMRegister msgtmp3 = xmm6;
1486 const XMMRegister msgtmp4 = xmm7;
1487
1488 const XMMRegister shuf_mask = xmm8;
1489
1490 __ enter();
1491
1492 __ sha512_AVX2(msg, state0, state1, msgtmp0, msgtmp1, msgtmp2, msgtmp3, msgtmp4,
1493 buf, state, ofs, limit, rsp, multi_block, shuf_mask);
1494
1495 __ vzeroupper();
1496 __ leave();
1497 __ ret(0);
1498
1499 return start;
1500 }
1501
1502 address StubGenerator::base64_shuffle_addr() {
1503 __ align64();
1504 StubCodeMark mark(this, "StubRoutines", "shuffle_base64");
1505 address start = __ pc();
1506
1507 assert(((unsigned long long)start & 0x3f) == 0,
1508 "Alignment problem (0x%08llx)", (unsigned long long)start);
1509 __ emit_data64(0x0405030401020001, relocInfo::none);
1510 __ emit_data64(0x0a0b090a07080607, relocInfo::none);
1511 __ emit_data64(0x10110f100d0e0c0d, relocInfo::none);
1512 __ emit_data64(0x1617151613141213, relocInfo::none);
1513 __ emit_data64(0x1c1d1b1c191a1819, relocInfo::none);
1514 __ emit_data64(0x222321221f201e1f, relocInfo::none);
1515 __ emit_data64(0x2829272825262425, relocInfo::none);
1516 __ emit_data64(0x2e2f2d2e2b2c2a2b, relocInfo::none);
1517
1518 return start;
1519 }
1520
1521 address StubGenerator::base64_avx2_shuffle_addr() {
1522 __ align32();
1523 StubCodeMark mark(this, "StubRoutines", "avx2_shuffle_base64");
1524 address start = __ pc();
1525
1526 __ emit_data64(0x0809070805060405, relocInfo::none);
1527 __ emit_data64(0x0e0f0d0e0b0c0a0b, relocInfo::none);
1528 __ emit_data64(0x0405030401020001, relocInfo::none);
1529 __ emit_data64(0x0a0b090a07080607, relocInfo::none);
1530
1531 return start;
1532 }
1533
1534 address StubGenerator::base64_avx2_input_mask_addr() {
1535 __ align32();
1536 StubCodeMark mark(this, "StubRoutines", "avx2_input_mask_base64");
1537 address start = __ pc();
1538
1539 __ emit_data64(0x8000000000000000, relocInfo::none);
1540 __ emit_data64(0x8000000080000000, relocInfo::none);
1541 __ emit_data64(0x8000000080000000, relocInfo::none);
1542 __ emit_data64(0x8000000080000000, relocInfo::none);
1543
1544 return start;
1545 }
1546
1547 address StubGenerator::base64_avx2_lut_addr() {
1548 __ align32();
1549 StubCodeMark mark(this, "StubRoutines", "avx2_lut_base64");
1550 address start = __ pc();
1551
1552 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
1553 __ emit_data64(0x0000f0edfcfcfcfc, relocInfo::none);
1554 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
1555 __ emit_data64(0x0000f0edfcfcfcfc, relocInfo::none);
1556
1557 // URL LUT
1558 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
1559 __ emit_data64(0x000020effcfcfcfc, relocInfo::none);
1560 __ emit_data64(0xfcfcfcfcfcfc4741, relocInfo::none);
1561 __ emit_data64(0x000020effcfcfcfc, relocInfo::none);
1562
1563 return start;
1564 }
1565
1566 address StubGenerator::base64_encoding_table_addr() {
1567 __ align64();
1568 StubCodeMark mark(this, "StubRoutines", "encoding_table_base64");
1569 address start = __ pc();
1570
1571 assert(((unsigned long long)start & 0x3f) == 0, "Alignment problem (0x%08llx)", (unsigned long long)start);
1572 __ emit_data64(0x4847464544434241, relocInfo::none);
1573 __ emit_data64(0x504f4e4d4c4b4a49, relocInfo::none);
1574 __ emit_data64(0x5857565554535251, relocInfo::none);
1575 __ emit_data64(0x6665646362615a59, relocInfo::none);
1576 __ emit_data64(0x6e6d6c6b6a696867, relocInfo::none);
1577 __ emit_data64(0x767574737271706f, relocInfo::none);
1578 __ emit_data64(0x333231307a797877, relocInfo::none);
1579 __ emit_data64(0x2f2b393837363534, relocInfo::none);
1580
1581 // URL table
1582 __ emit_data64(0x4847464544434241, relocInfo::none);
1583 __ emit_data64(0x504f4e4d4c4b4a49, relocInfo::none);
1584 __ emit_data64(0x5857565554535251, relocInfo::none);
1585 __ emit_data64(0x6665646362615a59, relocInfo::none);
1586 __ emit_data64(0x6e6d6c6b6a696867, relocInfo::none);
1587 __ emit_data64(0x767574737271706f, relocInfo::none);
1588 __ emit_data64(0x333231307a797877, relocInfo::none);
1589 __ emit_data64(0x5f2d393837363534, relocInfo::none);
1590
1591 return start;
1592 }
1593
1594 // Code for generating Base64 encoding.
1595 // Intrinsic function prototype in Base64.java:
1596 // private void encodeBlock(byte[] src, int sp, int sl, byte[] dst, int dp,
1597 // boolean isURL) {
1598 address StubGenerator::generate_base64_encodeBlock()
1599 {
1600 __ align(CodeEntryAlignment);
1601 StubCodeMark mark(this, "StubRoutines", "implEncode");
1602 address start = __ pc();
1603
1604 __ enter();
1605
1606 // Save callee-saved registers before using them
1607 __ push(r12);
1608 __ push(r13);
1609 __ push(r14);
1610 __ push(r15);
1611
1612 // arguments
1613 const Register source = c_rarg0; // Source Array
1614 const Register start_offset = c_rarg1; // start offset
1615 const Register end_offset = c_rarg2; // end offset
1616 const Register dest = c_rarg3; // destination array
1617
1618 #ifndef _WIN64
1619 const Register dp = c_rarg4; // Position for writing to dest array
1620 const Register isURL = c_rarg5; // Base64 or URL character set
1621 #else
1622 const Address dp_mem(rbp, 6 * wordSize); // length is on stack on Win64
1623 const Address isURL_mem(rbp, 7 * wordSize);
1624 const Register isURL = r10; // pick the volatile windows register
1625 const Register dp = r12;
1626 __ movl(dp, dp_mem);
1627 __ movl(isURL, isURL_mem);
1628 #endif
1629
1630 const Register length = r14;
1631 const Register encode_table = r13;
1632 Label L_process3, L_exit, L_processdata, L_vbmiLoop, L_not512, L_32byteLoop;
1633
1634 // calculate length from offsets
1635 __ movl(length, end_offset);
1636 __ subl(length, start_offset);
1637 __ cmpl(length, 0);
1638 __ jcc(Assembler::lessEqual, L_exit);
1639
1640 // Code for 512-bit VBMI encoding. Encodes 48 input bytes into 64
1641 // output bytes. We read 64 input bytes and ignore the last 16, so be
1642 // sure not to read past the end of the input buffer.
1643 if (VM_Version::supports_avx512_vbmi()) {
1644 __ cmpl(length, 64); // Do not overrun input buffer.
1645 __ jcc(Assembler::below, L_not512);
1646
1647 __ shll(isURL, 6); // index into decode table based on isURL
1648 __ lea(encode_table, ExternalAddress(StubRoutines::x86::base64_encoding_table_addr()));
1649 __ addptr(encode_table, isURL);
1650 __ shrl(isURL, 6); // restore isURL
1651
1652 __ mov64(rax, 0x3036242a1016040aull); // Shifts
1653 __ evmovdquq(xmm3, ExternalAddress(StubRoutines::x86::base64_shuffle_addr()), Assembler::AVX_512bit, r15);
1654 __ evmovdquq(xmm2, Address(encode_table, 0), Assembler::AVX_512bit);
1655 __ evpbroadcastq(xmm1, rax, Assembler::AVX_512bit);
1656
1657 __ align32();
1658 __ BIND(L_vbmiLoop);
1659
1660 __ vpermb(xmm0, xmm3, Address(source, start_offset), Assembler::AVX_512bit);
1661 __ subl(length, 48);
1662
1663 // Put the input bytes into the proper lanes for writing, then
1664 // encode them.
1665 __ evpmultishiftqb(xmm0, xmm1, xmm0, Assembler::AVX_512bit);
1666 __ vpermb(xmm0, xmm0, xmm2, Assembler::AVX_512bit);
1667
1668 // Write to destination
1669 __ evmovdquq(Address(dest, dp), xmm0, Assembler::AVX_512bit);
1670
1671 __ addptr(dest, 64);
1672 __ addptr(source, 48);
1673 __ cmpl(length, 64);
1674 __ jcc(Assembler::aboveEqual, L_vbmiLoop);
1675
1676 __ vzeroupper();
1677 }
1678
1679 __ BIND(L_not512);
1680 if (VM_Version::supports_avx2()
1681 && VM_Version::supports_avx512vlbw()) {
1682 /*
1683 ** This AVX2 encoder is based off the paper at:
1684 ** https://dl.acm.org/doi/10.1145/3132709
1685 **
1686 ** We use AVX2 SIMD instructions to encode 24 bytes into 32
1687 ** output bytes.
1688 **
1689 */
1690 // Lengths under 32 bytes are done with scalar routine
1691 __ cmpl(length, 31);
1692 __ jcc(Assembler::belowEqual, L_process3);
1693
1694 // Set up supporting constant table data
1695 __ vmovdqu(xmm9, ExternalAddress(StubRoutines::x86::base64_avx2_shuffle_addr()), rax);
1696 // 6-bit mask for 2nd and 4th (and multiples) 6-bit values
1697 __ movl(rax, 0x0fc0fc00);
1698 __ vmovdqu(xmm1, ExternalAddress(StubRoutines::x86::base64_avx2_input_mask_addr()), rax);
1699 __ evpbroadcastd(xmm8, rax, Assembler::AVX_256bit);
1700
1701 // Multiplication constant for "shifting" right by 6 and 10
1702 // bits
1703 __ movl(rax, 0x04000040);
1704
1705 __ subl(length, 24);
1706 __ evpbroadcastd(xmm7, rax, Assembler::AVX_256bit);
1707
1708 // For the first load, we mask off reading of the first 4
1709 // bytes into the register. This is so we can get 4 3-byte
1710 // chunks into each lane of the register, avoiding having to
1711 // handle end conditions. We then shuffle these bytes into a
1712 // specific order so that manipulation is easier.
1713 //
1714 // The initial read loads the XMM register like this:
1715 //
1716 // Lower 128-bit lane:
1717 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
1718 // | XX | XX | XX | XX | A0 | A1 | A2 | B0 | B1 | B2 | C0 | C1
1719 // | C2 | D0 | D1 | D2 |
1720 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
1721 //
1722 // Upper 128-bit lane:
1723 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
1724 // | E0 | E1 | E2 | F0 | F1 | F2 | G0 | G1 | G2 | H0 | H1 | H2
1725 // | XX | XX | XX | XX |
1726 // +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
1727 //
1728 // Where A0 is the first input byte, B0 is the fourth, etc.
1729 // The alphabetical significance denotes the 3 bytes to be
1730 // consumed and encoded into 4 bytes.
1731 //
1732 // We then shuffle the register so each 32-bit word contains
1733 // the sequence:
1734 // A1 A0 A2 A1, B1, B0, B2, B1, etc.
1735 // Each of these byte sequences are then manipulated into 4
1736 // 6-bit values ready for encoding.
1737 //
1738 // If we focus on one set of 3-byte chunks, changing the
1739 // nomenclature such that A0 => a, A1 => b, and A2 => c, we
1740 // shuffle such that each 24-bit chunk contains:
1741 //
1742 // b7 b6 b5 b4 b3 b2 b1 b0 | a7 a6 a5 a4 a3 a2 a1 a0 | c7 c6
1743 // c5 c4 c3 c2 c1 c0 | b7 b6 b5 b4 b3 b2 b1 b0
1744 // Explain this step.
1745 // b3 b2 b1 b0 c5 c4 c3 c2 | c1 c0 d5 d4 d3 d2 d1 d0 | a5 a4
1746 // a3 a2 a1 a0 b5 b4 | b3 b2 b1 b0 c5 c4 c3 c2
1747 //
1748 // W first and off all but bits 4-9 and 16-21 (c5..c0 and
1749 // a5..a0) and shift them using a vector multiplication
1750 // operation (vpmulhuw) which effectively shifts c right by 6
1751 // bits and a right by 10 bits. We similarly mask bits 10-15
1752 // (d5..d0) and 22-27 (b5..b0) and shift them left by 8 and 4
1753 // bits respectively. This is done using vpmullw. We end up
1754 // with 4 6-bit values, thus splitting the 3 input bytes,
1755 // ready for encoding:
1756 // 0 0 d5..d0 0 0 c5..c0 0 0 b5..b0 0 0 a5..a0
1757 //
1758 // For translation, we recognize that there are 5 distinct
1759 // ranges of legal Base64 characters as below:
1760 //
1761 // +-------------+-------------+------------+
1762 // | 6-bit value | ASCII range | offset |
1763 // +-------------+-------------+------------+
1764 // | 0..25 | A..Z | 65 |
1765 // | 26..51 | a..z | 71 |
1766 // | 52..61 | 0..9 | -4 |
1767 // | 62 | + or - | -19 or -17 |
1768 // | 63 | / or _ | -16 or 32 |
1769 // +-------------+-------------+------------+
1770 //
1771 // We note that vpshufb does a parallel lookup in a
1772 // destination register using the lower 4 bits of bytes from a
1773 // source register. If we use a saturated subtraction and
1774 // subtract 51 from each 6-bit value, bytes from [0,51]
1775 // saturate to 0, and [52,63] map to a range of [1,12]. We
1776 // distinguish the [0,25] and [26,51] ranges by assigning a
1777 // value of 13 for all 6-bit values less than 26. We end up
1778 // with:
1779 //
1780 // +-------------+-------------+------------+
1781 // | 6-bit value | Reduced | offset |
1782 // +-------------+-------------+------------+
1783 // | 0..25 | 13 | 65 |
1784 // | 26..51 | 0 | 71 |
1785 // | 52..61 | 0..9 | -4 |
1786 // | 62 | 11 | -19 or -17 |
1787 // | 63 | 12 | -16 or 32 |
1788 // +-------------+-------------+------------+
1789 //
1790 // We then use a final vpshufb to add the appropriate offset,
1791 // translating the bytes.
1792 //
1793 // Load input bytes - only 28 bytes. Mask the first load to
1794 // not load into the full register.
1795 __ vpmaskmovd(xmm1, xmm1, Address(source, start_offset, Address::times_1, -4), Assembler::AVX_256bit);
1796
1797 // Move 3-byte chunks of input (12 bytes) into 16 bytes,
1798 // ordering by:
1799 // 1, 0, 2, 1; 4, 3, 5, 4; etc. This groups 6-bit chunks
1800 // for easy masking
1801 __ vpshufb(xmm1, xmm1, xmm9, Assembler::AVX_256bit);
1802
1803 __ addl(start_offset, 24);
1804
1805 // Load masking register for first and third (and multiples)
1806 // 6-bit values.
1807 __ movl(rax, 0x003f03f0);
1808 __ evpbroadcastd(xmm6, rax, Assembler::AVX_256bit);
1809 // Multiplication constant for "shifting" left by 4 and 8 bits
1810 __ movl(rax, 0x01000010);
1811 __ evpbroadcastd(xmm5, rax, Assembler::AVX_256bit);
1812
1813 // Isolate 6-bit chunks of interest
1814 __ vpand(xmm0, xmm8, xmm1, Assembler::AVX_256bit);
1815
1816 // Load constants for encoding
1817 __ movl(rax, 0x19191919);
1818 __ evpbroadcastd(xmm3, rax, Assembler::AVX_256bit);
1819 __ movl(rax, 0x33333333);
1820 __ evpbroadcastd(xmm4, rax, Assembler::AVX_256bit);
1821
1822 // Shift output bytes 0 and 2 into proper lanes
1823 __ vpmulhuw(xmm2, xmm0, xmm7, Assembler::AVX_256bit);
1824
1825 // Mask and shift output bytes 1 and 3 into proper lanes and
1826 // combine
1827 __ vpand(xmm0, xmm6, xmm1, Assembler::AVX_256bit);
1828 __ vpmullw(xmm0, xmm5, xmm0, Assembler::AVX_256bit);
1829 __ vpor(xmm0, xmm0, xmm2, Assembler::AVX_256bit);
1830
1831 // Find out which are 0..25. This indicates which input
1832 // values fall in the range of 'A'-'Z', which require an
1833 // additional offset (see comments above)
1834 __ vpcmpgtb(xmm2, xmm0, xmm3, Assembler::AVX_256bit);
1835 __ vpsubusb(xmm1, xmm0, xmm4, Assembler::AVX_256bit);
1836 __ vpsubb(xmm1, xmm1, xmm2, Assembler::AVX_256bit);
1837
1838 // Load the proper lookup table
1839 __ lea(r11, ExternalAddress(StubRoutines::x86::base64_avx2_lut_addr()));
1840 __ movl(r15, isURL);
1841 __ shll(r15, 5);
1842 __ vmovdqu(xmm2, Address(r11, r15));
1843
1844 // Shuffle the offsets based on the range calculation done
1845 // above. This allows us to add the correct offset to the
1846 // 6-bit value corresponding to the range documented above.
1847 __ vpshufb(xmm1, xmm2, xmm1, Assembler::AVX_256bit);
1848 __ vpaddb(xmm0, xmm1, xmm0, Assembler::AVX_256bit);
1849
1850 // Store the encoded bytes
1851 __ vmovdqu(Address(dest, dp), xmm0);
1852 __ addl(dp, 32);
1853
1854 __ cmpl(length, 31);
1855 __ jcc(Assembler::belowEqual, L_process3);
1856
1857 __ align32();
1858 __ BIND(L_32byteLoop);
1859
1860 // Get next 32 bytes
1861 __ vmovdqu(xmm1, Address(source, start_offset, Address::times_1, -4));
1862
1863 __ subl(length, 24);
1864 __ addl(start_offset, 24);
1865
1866 // This logic is identical to the above, with only constant
1867 // register loads removed. Shuffle the input, mask off 6-bit
1868 // chunks, shift them into place, then add the offset to
1869 // encode.
1870 __ vpshufb(xmm1, xmm1, xmm9, Assembler::AVX_256bit);
1871
1872 __ vpand(xmm0, xmm8, xmm1, Assembler::AVX_256bit);
1873 __ vpmulhuw(xmm10, xmm0, xmm7, Assembler::AVX_256bit);
1874 __ vpand(xmm0, xmm6, xmm1, Assembler::AVX_256bit);
1875 __ vpmullw(xmm0, xmm5, xmm0, Assembler::AVX_256bit);
1876 __ vpor(xmm0, xmm0, xmm10, Assembler::AVX_256bit);
1877 __ vpcmpgtb(xmm10, xmm0, xmm3, Assembler::AVX_256bit);
1878 __ vpsubusb(xmm1, xmm0, xmm4, Assembler::AVX_256bit);
1879 __ vpsubb(xmm1, xmm1, xmm10, Assembler::AVX_256bit);
1880 __ vpshufb(xmm1, xmm2, xmm1, Assembler::AVX_256bit);
1881 __ vpaddb(xmm0, xmm1, xmm0, Assembler::AVX_256bit);
1882
1883 // Store the encoded bytes
1884 __ vmovdqu(Address(dest, dp), xmm0);
1885 __ addl(dp, 32);
1886
1887 __ cmpl(length, 31);
1888 __ jcc(Assembler::above, L_32byteLoop);
1889
1890 __ BIND(L_process3);
1891 __ vzeroupper();
1892 } else {
1893 __ BIND(L_process3);
1894 }
1895
1896 __ cmpl(length, 3);
1897 __ jcc(Assembler::below, L_exit);
1898
1899 // Load the encoding table based on isURL
1900 __ lea(r11, ExternalAddress(StubRoutines::x86::base64_encoding_table_addr()));
1901 __ movl(r15, isURL);
1902 __ shll(r15, 6);
1903 __ addptr(r11, r15);
1904
1905 __ BIND(L_processdata);
1906
1907 // Load 3 bytes
1908 __ load_unsigned_byte(r15, Address(source, start_offset));
1909 __ load_unsigned_byte(r10, Address(source, start_offset, Address::times_1, 1));
1910 __ load_unsigned_byte(r13, Address(source, start_offset, Address::times_1, 2));
1911
1912 // Build a 32-bit word with bytes 1, 2, 0, 1
1913 __ movl(rax, r10);
1914 __ shll(r10, 24);
1915 __ orl(rax, r10);
1916
1917 __ subl(length, 3);
1918
1919 __ shll(r15, 8);
1920 __ shll(r13, 16);
1921 __ orl(rax, r15);
1922
1923 __ addl(start_offset, 3);
1924
1925 __ orl(rax, r13);
1926 // At this point, rax contains | byte1 | byte2 | byte0 | byte1
1927 // r13 has byte2 << 16 - need low-order 6 bits to translate.
1928 // This translated byte is the fourth output byte.
1929 __ shrl(r13, 16);
1930 __ andl(r13, 0x3f);
1931
1932 // The high-order 6 bits of r15 (byte0) is translated.
1933 // The translated byte is the first output byte.
1934 __ shrl(r15, 10);
1935
1936 __ load_unsigned_byte(r13, Address(r11, r13));
1937 __ load_unsigned_byte(r15, Address(r11, r15));
1938
1939 __ movb(Address(dest, dp, Address::times_1, 3), r13);
1940
1941 // Extract high-order 4 bits of byte1 and low-order 2 bits of byte0.
1942 // This translated byte is the second output byte.
1943 __ shrl(rax, 4);
1944 __ movl(r10, rax);
1945 __ andl(rax, 0x3f);
1946
1947 __ movb(Address(dest, dp, Address::times_1, 0), r15);
1948
1949 __ load_unsigned_byte(rax, Address(r11, rax));
1950
1951 // Extract low-order 2 bits of byte1 and high-order 4 bits of byte2.
1952 // This translated byte is the third output byte.
1953 __ shrl(r10, 18);
1954 __ andl(r10, 0x3f);
1955
1956 __ load_unsigned_byte(r10, Address(r11, r10));
1957
1958 __ movb(Address(dest, dp, Address::times_1, 1), rax);
1959 __ movb(Address(dest, dp, Address::times_1, 2), r10);
1960
1961 __ addl(dp, 4);
1962 __ cmpl(length, 3);
1963 __ jcc(Assembler::aboveEqual, L_processdata);
1964
1965 __ BIND(L_exit);
1966 __ pop(r15);
1967 __ pop(r14);
1968 __ pop(r13);
1969 __ pop(r12);
1970 __ leave();
1971 __ ret(0);
1972
1973 return start;
1974 }
1975
1976 // base64 AVX512vbmi tables
1977 address StubGenerator::base64_vbmi_lookup_lo_addr() {
1978 __ align64();
1979 StubCodeMark mark(this, "StubRoutines", "lookup_lo_base64");
1980 address start = __ pc();
1981
1982 assert(((unsigned long long)start & 0x3f) == 0,
1983 "Alignment problem (0x%08llx)", (unsigned long long)start);
1984 __ emit_data64(0x8080808080808080, relocInfo::none);
1985 __ emit_data64(0x8080808080808080, relocInfo::none);
1986 __ emit_data64(0x8080808080808080, relocInfo::none);
1987 __ emit_data64(0x8080808080808080, relocInfo::none);
1988 __ emit_data64(0x8080808080808080, relocInfo::none);
1989 __ emit_data64(0x3f8080803e808080, relocInfo::none);
1990 __ emit_data64(0x3b3a393837363534, relocInfo::none);
1991 __ emit_data64(0x8080808080803d3c, relocInfo::none);
1992
1993 return start;
1994 }
1995
1996 address StubGenerator::base64_vbmi_lookup_hi_addr() {
1997 __ align64();
1998 StubCodeMark mark(this, "StubRoutines", "lookup_hi_base64");
1999 address start = __ pc();
2000
2001 assert(((unsigned long long)start & 0x3f) == 0,
2002 "Alignment problem (0x%08llx)", (unsigned long long)start);
2003 __ emit_data64(0x0605040302010080, relocInfo::none);
2004 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2005 __ emit_data64(0x161514131211100f, relocInfo::none);
2006 __ emit_data64(0x8080808080191817, relocInfo::none);
2007 __ emit_data64(0x201f1e1d1c1b1a80, relocInfo::none);
2008 __ emit_data64(0x2827262524232221, relocInfo::none);
2009 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2010 __ emit_data64(0x8080808080333231, relocInfo::none);
2011
2012 return start;
2013 }
2014 address StubGenerator::base64_vbmi_lookup_lo_url_addr() {
2015 __ align64();
2016 StubCodeMark mark(this, "StubRoutines", "lookup_lo_base64url");
2017 address start = __ pc();
2018
2019 assert(((unsigned long long)start & 0x3f) == 0,
2020 "Alignment problem (0x%08llx)", (unsigned long long)start);
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(0x8080808080808080, relocInfo::none);
2026 __ emit_data64(0x80803e8080808080, relocInfo::none);
2027 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2028 __ emit_data64(0x8080808080803d3c, relocInfo::none);
2029
2030 return start;
2031 }
2032
2033 address StubGenerator::base64_vbmi_lookup_hi_url_addr() {
2034 __ align64();
2035 StubCodeMark mark(this, "StubRoutines", "lookup_hi_base64url");
2036 address start = __ pc();
2037
2038 assert(((unsigned long long)start & 0x3f) == 0,
2039 "Alignment problem (0x%08llx)", (unsigned long long)start);
2040 __ emit_data64(0x0605040302010080, relocInfo::none);
2041 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2042 __ emit_data64(0x161514131211100f, relocInfo::none);
2043 __ emit_data64(0x3f80808080191817, relocInfo::none);
2044 __ emit_data64(0x201f1e1d1c1b1a80, relocInfo::none);
2045 __ emit_data64(0x2827262524232221, relocInfo::none);
2046 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2047 __ emit_data64(0x8080808080333231, relocInfo::none);
2048
2049 return start;
2050 }
2051
2052 address StubGenerator::base64_vbmi_pack_vec_addr() {
2053 __ align64();
2054 StubCodeMark mark(this, "StubRoutines", "pack_vec_base64");
2055 address start = __ pc();
2056
2057 assert(((unsigned long long)start & 0x3f) == 0,
2058 "Alignment problem (0x%08llx)", (unsigned long long)start);
2059 __ emit_data64(0x090a040506000102, relocInfo::none);
2060 __ emit_data64(0x161011120c0d0e08, relocInfo::none);
2061 __ emit_data64(0x1c1d1e18191a1415, relocInfo::none);
2062 __ emit_data64(0x292a242526202122, relocInfo::none);
2063 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2064 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2065 __ emit_data64(0x0000000000000000, relocInfo::none);
2066 __ emit_data64(0x0000000000000000, relocInfo::none);
2067
2068 return start;
2069 }
2070
2071 address StubGenerator::base64_vbmi_join_0_1_addr() {
2072 __ align64();
2073 StubCodeMark mark(this, "StubRoutines", "join_0_1_base64");
2074 address start = __ pc();
2075
2076 assert(((unsigned long long)start & 0x3f) == 0,
2077 "Alignment problem (0x%08llx)", (unsigned long long)start);
2078 __ emit_data64(0x090a040506000102, relocInfo::none);
2079 __ emit_data64(0x161011120c0d0e08, relocInfo::none);
2080 __ emit_data64(0x1c1d1e18191a1415, relocInfo::none);
2081 __ emit_data64(0x292a242526202122, relocInfo::none);
2082 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2083 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2084 __ emit_data64(0x494a444546404142, relocInfo::none);
2085 __ emit_data64(0x565051524c4d4e48, relocInfo::none);
2086
2087 return start;
2088 }
2089
2090 address StubGenerator::base64_vbmi_join_1_2_addr() {
2091 __ align64();
2092 StubCodeMark mark(this, "StubRoutines", "join_1_2_base64");
2093 address start = __ pc();
2094
2095 assert(((unsigned long long)start & 0x3f) == 0,
2096 "Alignment problem (0x%08llx)", (unsigned long long)start);
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(0x494a444546404142, relocInfo::none);
2102 __ emit_data64(0x565051524c4d4e48, relocInfo::none);
2103 __ emit_data64(0x5c5d5e58595a5455, relocInfo::none);
2104 __ emit_data64(0x696a646566606162, relocInfo::none);
2105
2106 return start;
2107 }
2108
2109 address StubGenerator::base64_vbmi_join_2_3_addr() {
2110 __ align64();
2111 StubCodeMark mark(this, "StubRoutines", "join_2_3_base64");
2112 address start = __ pc();
2113
2114 assert(((unsigned long long)start & 0x3f) == 0,
2115 "Alignment problem (0x%08llx)", (unsigned long long)start);
2116 __ emit_data64(0x363031322c2d2e28, relocInfo::none);
2117 __ emit_data64(0x3c3d3e38393a3435, relocInfo::none);
2118 __ emit_data64(0x494a444546404142, relocInfo::none);
2119 __ emit_data64(0x565051524c4d4e48, relocInfo::none);
2120 __ emit_data64(0x5c5d5e58595a5455, relocInfo::none);
2121 __ emit_data64(0x696a646566606162, relocInfo::none);
2122 __ emit_data64(0x767071726c6d6e68, relocInfo::none);
2123 __ emit_data64(0x7c7d7e78797a7475, relocInfo::none);
2124
2125 return start;
2126 }
2127
2128 address StubGenerator::base64_decoding_table_addr() {
2129 StubCodeMark mark(this, "StubRoutines", "decoding_table_base64");
2130 address start = __ pc();
2131
2132 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2133 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2134 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2135 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2136 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2137 __ emit_data64(0x3fffffff3effffff, relocInfo::none);
2138 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2139 __ emit_data64(0xffffffffffff3d3c, relocInfo::none);
2140 __ emit_data64(0x06050403020100ff, relocInfo::none);
2141 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2142 __ emit_data64(0x161514131211100f, relocInfo::none);
2143 __ emit_data64(0xffffffffff191817, relocInfo::none);
2144 __ emit_data64(0x201f1e1d1c1b1aff, relocInfo::none);
2145 __ emit_data64(0x2827262524232221, relocInfo::none);
2146 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2147 __ emit_data64(0xffffffffff333231, relocInfo::none);
2148 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2149 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2150 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2151 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2152 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2153 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2154 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2155 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2156 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2157 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2158 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2159 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2160 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2161 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2162 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2163 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2164
2165 // URL table
2166 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2167 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2168 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2169 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2170 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2171 __ emit_data64(0xffff3effffffffff, relocInfo::none);
2172 __ emit_data64(0x3b3a393837363534, relocInfo::none);
2173 __ emit_data64(0xffffffffffff3d3c, relocInfo::none);
2174 __ emit_data64(0x06050403020100ff, relocInfo::none);
2175 __ emit_data64(0x0e0d0c0b0a090807, relocInfo::none);
2176 __ emit_data64(0x161514131211100f, relocInfo::none);
2177 __ emit_data64(0x3fffffffff191817, relocInfo::none);
2178 __ emit_data64(0x201f1e1d1c1b1aff, relocInfo::none);
2179 __ emit_data64(0x2827262524232221, relocInfo::none);
2180 __ emit_data64(0x302f2e2d2c2b2a29, relocInfo::none);
2181 __ emit_data64(0xffffffffff333231, relocInfo::none);
2182 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2183 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2184 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2185 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2186 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2187 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2188 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2189 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2190 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2191 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2192 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2193 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2194 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2195 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2196 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2197 __ emit_data64(0xffffffffffffffff, relocInfo::none);
2198
2199 return start;
2200 }
2201
2202
2203 // Code for generating Base64 decoding.
2204 //
2205 // Based on the article (and associated code) from https://arxiv.org/abs/1910.05109.
2206 //
2207 // Intrinsic function prototype in Base64.java:
2208 // private void decodeBlock(byte[] src, int sp, int sl, byte[] dst, int dp, boolean isURL, isMIME) {
2209 address StubGenerator::generate_base64_decodeBlock() {
2210 __ align(CodeEntryAlignment);
2211 StubCodeMark mark(this, "StubRoutines", "implDecode");
2212 address start = __ pc();
2213
2214 __ enter();
2215
2216 // Save callee-saved registers before using them
2217 __ push(r12);
2218 __ push(r13);
2219 __ push(r14);
2220 __ push(r15);
2221 __ push(rbx);
2222
2223 // arguments
2224 const Register source = c_rarg0; // Source Array
2225 const Register start_offset = c_rarg1; // start offset
2226 const Register end_offset = c_rarg2; // end offset
2227 const Register dest = c_rarg3; // destination array
2228 const Register isMIME = rbx;
2229
2230 #ifndef _WIN64
2231 const Register dp = c_rarg4; // Position for writing to dest array
2232 const Register isURL = c_rarg5;// Base64 or URL character set
2233 __ movl(isMIME, Address(rbp, 2 * wordSize));
2234 #else
2235 const Address dp_mem(rbp, 6 * wordSize); // length is on stack on Win64
2236 const Address isURL_mem(rbp, 7 * wordSize);
2237 const Register isURL = r10; // pick the volatile windows register
2238 const Register dp = r12;
2239 __ movl(dp, dp_mem);
2240 __ movl(isURL, isURL_mem);
2241 __ movl(isMIME, Address(rbp, 8 * wordSize));
2242 #endif
2243
2244 const XMMRegister lookup_lo = xmm5;
2245 const XMMRegister lookup_hi = xmm6;
2246 const XMMRegister errorvec = xmm7;
2247 const XMMRegister pack16_op = xmm9;
2248 const XMMRegister pack32_op = xmm8;
2249 const XMMRegister input0 = xmm3;
2250 const XMMRegister input1 = xmm20;
2251 const XMMRegister input2 = xmm21;
2252 const XMMRegister input3 = xmm19;
2253 const XMMRegister join01 = xmm12;
2254 const XMMRegister join12 = xmm11;
2255 const XMMRegister join23 = xmm10;
2256 const XMMRegister translated0 = xmm2;
2257 const XMMRegister translated1 = xmm1;
2258 const XMMRegister translated2 = xmm0;
2259 const XMMRegister translated3 = xmm4;
2260
2261 const XMMRegister merged0 = xmm2;
2262 const XMMRegister merged1 = xmm1;
2263 const XMMRegister merged2 = xmm0;
2264 const XMMRegister merged3 = xmm4;
2265 const XMMRegister merge_ab_bc0 = xmm2;
2266 const XMMRegister merge_ab_bc1 = xmm1;
2267 const XMMRegister merge_ab_bc2 = xmm0;
2268 const XMMRegister merge_ab_bc3 = xmm4;
2269
2270 const XMMRegister pack24bits = xmm4;
2271
2272 const Register length = r14;
2273 const Register output_size = r13;
2274 const Register output_mask = r15;
2275 const KRegister input_mask = k1;
2276
2277 const XMMRegister input_initial_valid_b64 = xmm0;
2278 const XMMRegister tmp = xmm10;
2279 const XMMRegister mask = xmm0;
2280 const XMMRegister invalid_b64 = xmm1;
2281
2282 Label L_process256, L_process64, L_process64Loop, L_exit, L_processdata, L_loadURL;
2283 Label L_continue, L_finalBit, L_padding, L_donePadding, L_bruteForce;
2284 Label L_forceLoop, L_bottomLoop, L_checkMIME, L_exit_no_vzero;
2285
2286 // calculate length from offsets
2287 __ movl(length, end_offset);
2288 __ subl(length, start_offset);
2289 __ push(dest); // Save for return value calc
2290
2291 // If AVX512 VBMI not supported, just compile non-AVX code
2292 if(VM_Version::supports_avx512_vbmi() &&
2293 VM_Version::supports_avx512bw()) {
2294 __ cmpl(length, 128); // 128-bytes is break-even for AVX-512
2295 __ jcc(Assembler::lessEqual, L_bruteForce);
2296
2297 __ cmpl(isMIME, 0);
2298 __ jcc(Assembler::notEqual, L_bruteForce);
2299
2300 // Load lookup tables based on isURL
2301 __ cmpl(isURL, 0);
2302 __ jcc(Assembler::notZero, L_loadURL);
2303
2304 __ evmovdquq(lookup_lo, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_lo_addr()), Assembler::AVX_512bit, r13);
2305 __ evmovdquq(lookup_hi, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_hi_addr()), Assembler::AVX_512bit, r13);
2306
2307 __ BIND(L_continue);
2308
2309 __ movl(r15, 0x01400140);
2310 __ evpbroadcastd(pack16_op, r15, Assembler::AVX_512bit);
2311
2312 __ movl(r15, 0x00011000);
2313 __ evpbroadcastd(pack32_op, r15, Assembler::AVX_512bit);
2314
2315 __ cmpl(length, 0xff);
2316 __ jcc(Assembler::lessEqual, L_process64);
2317
2318 // load masks required for decoding data
2319 __ BIND(L_processdata);
2320 __ evmovdquq(join01, ExternalAddress(StubRoutines::x86::base64_vbmi_join_0_1_addr()), Assembler::AVX_512bit,r13);
2321 __ evmovdquq(join12, ExternalAddress(StubRoutines::x86::base64_vbmi_join_1_2_addr()), Assembler::AVX_512bit, r13);
2322 __ evmovdquq(join23, ExternalAddress(StubRoutines::x86::base64_vbmi_join_2_3_addr()), Assembler::AVX_512bit, r13);
2323
2324 __ align32();
2325 __ BIND(L_process256);
2326 // Grab input data
2327 __ evmovdquq(input0, Address(source, start_offset, Address::times_1, 0x00), Assembler::AVX_512bit);
2328 __ evmovdquq(input1, Address(source, start_offset, Address::times_1, 0x40), Assembler::AVX_512bit);
2329 __ evmovdquq(input2, Address(source, start_offset, Address::times_1, 0x80), Assembler::AVX_512bit);
2330 __ evmovdquq(input3, Address(source, start_offset, Address::times_1, 0xc0), Assembler::AVX_512bit);
2331
2332 // Copy the low part of the lookup table into the destination of the permutation
2333 __ evmovdquq(translated0, lookup_lo, Assembler::AVX_512bit);
2334 __ evmovdquq(translated1, lookup_lo, Assembler::AVX_512bit);
2335 __ evmovdquq(translated2, lookup_lo, Assembler::AVX_512bit);
2336 __ evmovdquq(translated3, lookup_lo, Assembler::AVX_512bit);
2337
2338 // Translate the base64 input into "decoded" bytes
2339 __ evpermt2b(translated0, input0, lookup_hi, Assembler::AVX_512bit);
2340 __ evpermt2b(translated1, input1, lookup_hi, Assembler::AVX_512bit);
2341 __ evpermt2b(translated2, input2, lookup_hi, Assembler::AVX_512bit);
2342 __ evpermt2b(translated3, input3, lookup_hi, Assembler::AVX_512bit);
2343
2344 // OR all of the translations together to check for errors (high-order bit of byte set)
2345 __ vpternlogd(input0, 0xfe, input1, input2, Assembler::AVX_512bit);
2346
2347 __ vpternlogd(input3, 0xfe, translated0, translated1, Assembler::AVX_512bit);
2348 __ vpternlogd(input0, 0xfe, translated2, translated3, Assembler::AVX_512bit);
2349 __ vpor(errorvec, input3, input0, Assembler::AVX_512bit);
2350
2351 // Check if there was an error - if so, try 64-byte chunks
2352 __ evpmovb2m(k3, errorvec, Assembler::AVX_512bit);
2353 __ kortestql(k3, k3);
2354 __ jcc(Assembler::notZero, L_process64);
2355
2356 // The merging and shuffling happens here
2357 // We multiply each byte pair [00dddddd | 00cccccc | 00bbbbbb | 00aaaaaa]
2358 // Multiply [00cccccc] by 2^6 added to [00dddddd] to get [0000cccc | ccdddddd]
2359 // The pack16_op is a vector of 0x01400140, so multiply D by 1 and C by 0x40
2360 __ vpmaddubsw(merge_ab_bc0, translated0, pack16_op, Assembler::AVX_512bit);
2361 __ vpmaddubsw(merge_ab_bc1, translated1, pack16_op, Assembler::AVX_512bit);
2362 __ vpmaddubsw(merge_ab_bc2, translated2, pack16_op, Assembler::AVX_512bit);
2363 __ vpmaddubsw(merge_ab_bc3, translated3, pack16_op, Assembler::AVX_512bit);
2364
2365 // Now do the same with packed 16-bit values.
2366 // We start with [0000cccc | ccdddddd | 0000aaaa | aabbbbbb]
2367 // pack32_op is 0x00011000 (2^12, 1), so this multiplies [0000aaaa | aabbbbbb] by 2^12
2368 // and adds [0000cccc | ccdddddd] to yield [00000000 | aaaaaabb | bbbbcccc | ccdddddd]
2369 __ vpmaddwd(merged0, merge_ab_bc0, pack32_op, Assembler::AVX_512bit);
2370 __ vpmaddwd(merged1, merge_ab_bc1, pack32_op, Assembler::AVX_512bit);
2371 __ vpmaddwd(merged2, merge_ab_bc2, pack32_op, Assembler::AVX_512bit);
2372 __ vpmaddwd(merged3, merge_ab_bc3, pack32_op, Assembler::AVX_512bit);
2373
2374 // The join vectors specify which byte from which vector goes into the outputs
2375 // One of every 4 bytes in the extended vector is zero, so we pack them into their
2376 // final positions in the register for storing (256 bytes in, 192 bytes out)
2377 __ evpermt2b(merged0, join01, merged1, Assembler::AVX_512bit);
2378 __ evpermt2b(merged1, join12, merged2, Assembler::AVX_512bit);
2379 __ evpermt2b(merged2, join23, merged3, Assembler::AVX_512bit);
2380
2381 // Store result
2382 __ evmovdquq(Address(dest, dp, Address::times_1, 0x00), merged0, Assembler::AVX_512bit);
2383 __ evmovdquq(Address(dest, dp, Address::times_1, 0x40), merged1, Assembler::AVX_512bit);
2384 __ evmovdquq(Address(dest, dp, Address::times_1, 0x80), merged2, Assembler::AVX_512bit);
2385
2386 __ addptr(source, 0x100);
2387 __ addptr(dest, 0xc0);
2388 __ subl(length, 0x100);
2389 __ cmpl(length, 64 * 4);
2390 __ jcc(Assembler::greaterEqual, L_process256);
2391
2392 // At this point, we've decoded 64 * 4 * n bytes.
2393 // The remaining length will be <= 64 * 4 - 1.
2394 // UNLESS there was an error decoding the first 256-byte chunk. In this
2395 // case, the length will be arbitrarily long.
2396 //
2397 // Note that this will be the path for MIME-encoded strings.
2398
2399 __ BIND(L_process64);
2400
2401 __ evmovdquq(pack24bits, ExternalAddress(StubRoutines::x86::base64_vbmi_pack_vec_addr()), Assembler::AVX_512bit, r13);
2402
2403 __ cmpl(length, 63);
2404 __ jcc(Assembler::lessEqual, L_finalBit);
2405
2406 __ mov64(rax, 0x0000ffffffffffff);
2407 __ kmovql(k2, rax);
2408
2409 __ align32();
2410 __ BIND(L_process64Loop);
2411
2412 // Handle first 64-byte block
2413
2414 __ evmovdquq(input0, Address(source, start_offset), Assembler::AVX_512bit);
2415 __ evmovdquq(translated0, lookup_lo, Assembler::AVX_512bit);
2416 __ evpermt2b(translated0, input0, lookup_hi, Assembler::AVX_512bit);
2417
2418 __ vpor(errorvec, translated0, input0, Assembler::AVX_512bit);
2419
2420 // Check for error and bomb out before updating dest
2421 __ evpmovb2m(k3, errorvec, Assembler::AVX_512bit);
2422 __ kortestql(k3, k3);
2423 __ jcc(Assembler::notZero, L_exit);
2424
2425 // Pack output register, selecting correct byte ordering
2426 __ vpmaddubsw(merge_ab_bc0, translated0, pack16_op, Assembler::AVX_512bit);
2427 __ vpmaddwd(merged0, merge_ab_bc0, pack32_op, Assembler::AVX_512bit);
2428 __ vpermb(merged0, pack24bits, merged0, Assembler::AVX_512bit);
2429
2430 __ evmovdqub(Address(dest, dp), k2, merged0, true, Assembler::AVX_512bit);
2431
2432 __ subl(length, 64);
2433 __ addptr(source, 64);
2434 __ addptr(dest, 48);
2435
2436 __ cmpl(length, 64);
2437 __ jcc(Assembler::greaterEqual, L_process64Loop);
2438
2439 __ cmpl(length, 0);
2440 __ jcc(Assembler::lessEqual, L_exit);
2441
2442 __ BIND(L_finalBit);
2443 // Now have 1 to 63 bytes left to decode
2444
2445 // I was going to let Java take care of the final fragment
2446 // however it will repeatedly call this routine for every 4 bytes
2447 // of input data, so handle the rest here.
2448 __ movq(rax, -1);
2449 __ bzhiq(rax, rax, length); // Input mask in rax
2450
2451 __ movl(output_size, length);
2452 __ shrl(output_size, 2); // Find (len / 4) * 3 (output length)
2453 __ lea(output_size, Address(output_size, output_size, Address::times_2, 0));
2454 // output_size in r13
2455
2456 // Strip pad characters, if any, and adjust length and mask
2457 __ cmpb(Address(source, length, Address::times_1, -1), '=');
2458 __ jcc(Assembler::equal, L_padding);
2459
2460 __ BIND(L_donePadding);
2461
2462 // Output size is (64 - output_size), output mask is (all 1s >> output_size).
2463 __ kmovql(input_mask, rax);
2464 __ movq(output_mask, -1);
2465 __ bzhiq(output_mask, output_mask, output_size);
2466
2467 // Load initial input with all valid base64 characters. Will be used
2468 // in merging source bytes to avoid masking when determining if an error occurred.
2469 __ movl(rax, 0x61616161);
2470 __ evpbroadcastd(input_initial_valid_b64, rax, Assembler::AVX_512bit);
2471
2472 // A register containing all invalid base64 decoded values
2473 __ movl(rax, 0x80808080);
2474 __ evpbroadcastd(invalid_b64, rax, Assembler::AVX_512bit);
2475
2476 // input_mask is in k1
2477 // output_size is in r13
2478 // output_mask is in r15
2479 // zmm0 - free
2480 // zmm1 - 0x00011000
2481 // zmm2 - 0x01400140
2482 // zmm3 - errorvec
2483 // zmm4 - pack vector
2484 // zmm5 - lookup_lo
2485 // zmm6 - lookup_hi
2486 // zmm7 - errorvec
2487 // zmm8 - 0x61616161
2488 // zmm9 - 0x80808080
2489
2490 // Load only the bytes from source, merging into our "fully-valid" register
2491 __ evmovdqub(input_initial_valid_b64, input_mask, Address(source, start_offset, Address::times_1, 0x0), true, Assembler::AVX_512bit);
2492
2493 // Decode all bytes within our merged input
2494 __ evmovdquq(tmp, lookup_lo, Assembler::AVX_512bit);
2495 __ evpermt2b(tmp, input_initial_valid_b64, lookup_hi, Assembler::AVX_512bit);
2496 __ vporq(mask, tmp, input_initial_valid_b64, Assembler::AVX_512bit);
2497
2498 // Check for error. Compare (decoded | initial) to all invalid.
2499 // If any bytes have their high-order bit set, then we have an error.
2500 __ evptestmb(k2, mask, invalid_b64, Assembler::AVX_512bit);
2501 __ kortestql(k2, k2);
2502
2503 // If we have an error, use the brute force loop to decode what we can (4-byte chunks).
2504 __ jcc(Assembler::notZero, L_bruteForce);
2505
2506 // Shuffle output bytes
2507 __ vpmaddubsw(tmp, tmp, pack16_op, Assembler::AVX_512bit);
2508 __ vpmaddwd(tmp, tmp, pack32_op, Assembler::AVX_512bit);
2509
2510 __ vpermb(tmp, pack24bits, tmp, Assembler::AVX_512bit);
2511 __ kmovql(k1, output_mask);
2512 __ evmovdqub(Address(dest, dp), k1, tmp, true, Assembler::AVX_512bit);
2513
2514 __ addptr(dest, output_size);
2515
2516 __ BIND(L_exit);
2517 __ vzeroupper();
2518 __ pop(rax); // Get original dest value
2519 __ subptr(dest, rax); // Number of bytes converted
2520 __ movptr(rax, dest);
2521 __ pop(rbx);
2522 __ pop(r15);
2523 __ pop(r14);
2524 __ pop(r13);
2525 __ pop(r12);
2526 __ leave();
2527 __ ret(0);
2528
2529 __ BIND(L_loadURL);
2530 __ evmovdquq(lookup_lo, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_lo_url_addr()), Assembler::AVX_512bit, r13);
2531 __ evmovdquq(lookup_hi, ExternalAddress(StubRoutines::x86::base64_vbmi_lookup_hi_url_addr()), Assembler::AVX_512bit, r13);
2532 __ jmp(L_continue);
2533
2534 __ BIND(L_padding);
2535 __ decrementq(output_size, 1);
2536 __ shrq(rax, 1);
2537
2538 __ cmpb(Address(source, length, Address::times_1, -2), '=');
2539 __ jcc(Assembler::notEqual, L_donePadding);
2540
2541 __ decrementq(output_size, 1);
2542 __ shrq(rax, 1);
2543 __ jmp(L_donePadding);
2544
2545 __ align32();
2546 __ BIND(L_bruteForce);
2547 } // End of if(avx512_vbmi)
2548
2549 // Use non-AVX code to decode 4-byte chunks into 3 bytes of output
2550
2551 // Register state (Linux):
2552 // r12-15 - saved on stack
2553 // rdi - src
2554 // rsi - sp
2555 // rdx - sl
2556 // rcx - dst
2557 // r8 - dp
2558 // r9 - isURL
2559
2560 // Register state (Windows):
2561 // r12-15 - saved on stack
2562 // rcx - src
2563 // rdx - sp
2564 // r8 - sl
2565 // r9 - dst
2566 // r12 - dp
2567 // r10 - isURL
2568
2569 // Registers (common):
2570 // length (r14) - bytes in src
2571
2572 const Register decode_table = r11;
2573 const Register out_byte_count = rbx;
2574 const Register byte1 = r13;
2575 const Register byte2 = r15;
2576 const Register byte3 = WIN64_ONLY(r8) NOT_WIN64(rdx);
2577 const Register byte4 = WIN64_ONLY(r10) NOT_WIN64(r9);
2578
2579 __ shrl(length, 2); // Multiple of 4 bytes only - length is # 4-byte chunks
2580 __ cmpl(length, 0);
2581 __ jcc(Assembler::lessEqual, L_exit_no_vzero);
2582
2583 __ shll(isURL, 8); // index into decode table based on isURL
2584 __ lea(decode_table, ExternalAddress(StubRoutines::x86::base64_decoding_table_addr()));
2585 __ addptr(decode_table, isURL);
2586
2587 __ jmp(L_bottomLoop);
2588
2589 __ align32();
2590 __ BIND(L_forceLoop);
2591 __ shll(byte1, 18);
2592 __ shll(byte2, 12);
2593 __ shll(byte3, 6);
2594 __ orl(byte1, byte2);
2595 __ orl(byte1, byte3);
2596 __ orl(byte1, byte4);
2597
2598 __ addptr(source, 4);
2599
2600 __ movb(Address(dest, dp, Address::times_1, 2), byte1);
2601 __ shrl(byte1, 8);
2602 __ movb(Address(dest, dp, Address::times_1, 1), byte1);
2603 __ shrl(byte1, 8);
2604 __ movb(Address(dest, dp, Address::times_1, 0), byte1);
2605
2606 __ addptr(dest, 3);
2607 __ decrementl(length, 1);
2608 __ jcc(Assembler::zero, L_exit_no_vzero);
2609
2610 __ BIND(L_bottomLoop);
2611 __ load_unsigned_byte(byte1, Address(source, start_offset, Address::times_1, 0x00));
2612 __ load_unsigned_byte(byte2, Address(source, start_offset, Address::times_1, 0x01));
2613 __ load_signed_byte(byte1, Address(decode_table, byte1));
2614 __ load_signed_byte(byte2, Address(decode_table, byte2));
2615 __ load_unsigned_byte(byte3, Address(source, start_offset, Address::times_1, 0x02));
2616 __ load_unsigned_byte(byte4, Address(source, start_offset, Address::times_1, 0x03));
2617 __ load_signed_byte(byte3, Address(decode_table, byte3));
2618 __ load_signed_byte(byte4, Address(decode_table, byte4));
2619
2620 __ mov(rax, byte1);
2621 __ orl(rax, byte2);
2622 __ orl(rax, byte3);
2623 __ orl(rax, byte4);
2624 __ jcc(Assembler::positive, L_forceLoop);
2625
2626 __ BIND(L_exit_no_vzero);
2627 __ pop(rax); // Get original dest value
2628 __ subptr(dest, rax); // Number of bytes converted
2629 __ movptr(rax, dest);
2630 __ pop(rbx);
2631 __ pop(r15);
2632 __ pop(r14);
2633 __ pop(r13);
2634 __ pop(r12);
2635 __ leave();
2636 __ ret(0);
2637
2638 return start;
2639 }
2640
2641
2642 /**
2643 * Arguments:
2644 *
2645 * Inputs:
2646 * c_rarg0 - int crc
2647 * c_rarg1 - byte* buf
2648 * c_rarg2 - int length
2649 *
2650 * Output:
2651 * rax - int crc result
2652 */
2653 address StubGenerator::generate_updateBytesCRC32() {
2654 assert(UseCRC32Intrinsics, "need AVX and CLMUL instructions");
2655
2656 __ align(CodeEntryAlignment);
2657 StubCodeMark mark(this, "StubRoutines", "updateBytesCRC32");
2658
2659 address start = __ pc();
2660
2661 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
2662 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
2663 // rscratch1: r10
2664 const Register crc = c_rarg0; // crc
2665 const Register buf = c_rarg1; // source java byte array address
2666 const Register len = c_rarg2; // length
2667 const Register table = c_rarg3; // crc_table address (reuse register)
2668 const Register tmp1 = r11;
2669 const Register tmp2 = r10;
2670 assert_different_registers(crc, buf, len, table, tmp1, tmp2, rax);
2671
2672 BLOCK_COMMENT("Entry:");
2673 __ enter(); // required for proper stackwalking of RuntimeStub frame
2674
2675 if (VM_Version::supports_sse4_1() && VM_Version::supports_avx512_vpclmulqdq() &&
2676 VM_Version::supports_avx512bw() &&
2677 VM_Version::supports_avx512vl()) {
2678 // The constants used in the CRC32 algorithm requires the 1's compliment of the initial crc value.
2679 // However, the constant table for CRC32-C assumes the original crc value. Account for this
2680 // difference before calling and after returning.
2681 __ lea(table, ExternalAddress(StubRoutines::x86::crc_table_avx512_addr()));
2682 __ notl(crc);
2683 __ kernel_crc32_avx512(crc, buf, len, table, tmp1, tmp2);
2684 __ notl(crc);
2685 } else {
2686 __ kernel_crc32(crc, buf, len, table, tmp1);
2687 }
2688
2689 __ movl(rax, crc);
2690 __ vzeroupper();
2691 __ leave(); // required for proper stackwalking of RuntimeStub frame
2692 __ ret(0);
2693
2694 return start;
2695 }
2696
2697 /**
2698 * Arguments:
2699 *
2700 * Inputs:
2701 * c_rarg0 - int crc
2702 * c_rarg1 - byte* buf
2703 * c_rarg2 - long length
2704 * c_rarg3 - table_start - optional (present only when doing a library_call,
2705 * not used by x86 algorithm)
2706 *
2707 * Output:
2708 * rax - int crc result
2709 */
2710 address StubGenerator::generate_updateBytesCRC32C(bool is_pclmulqdq_supported) {
2711 assert(UseCRC32CIntrinsics, "need SSE4_2");
2712 __ align(CodeEntryAlignment);
2713 StubCodeMark mark(this, "StubRoutines", "updateBytesCRC32C");
2714 address start = __ pc();
2715
2716 //reg.arg int#0 int#1 int#2 int#3 int#4 int#5 float regs
2717 //Windows RCX RDX R8 R9 none none XMM0..XMM3
2718 //Lin / Sol RDI RSI RDX RCX R8 R9 XMM0..XMM7
2719 const Register crc = c_rarg0; // crc
2720 const Register buf = c_rarg1; // source java byte array address
2721 const Register len = c_rarg2; // length
2722 const Register a = rax;
2723 const Register j = r9;
2724 const Register k = r10;
2725 const Register l = r11;
2726 #ifdef _WIN64
2727 const Register y = rdi;
2728 const Register z = rsi;
2729 #else
2730 const Register y = rcx;
2731 const Register z = r8;
2732 #endif
2733 assert_different_registers(crc, buf, len, a, j, k, l, y, z);
2734
2735 BLOCK_COMMENT("Entry:");
2736 __ enter(); // required for proper stackwalking of RuntimeStub frame
2737 if (VM_Version::supports_sse4_1() && VM_Version::supports_avx512_vpclmulqdq() &&
2738 VM_Version::supports_avx512bw() &&
2739 VM_Version::supports_avx512vl()) {
2740 __ lea(j, ExternalAddress(StubRoutines::x86::crc32c_table_avx512_addr()));
2741 __ kernel_crc32_avx512(crc, buf, len, j, l, k);
2742 } else {
2743 #ifdef _WIN64
2744 __ push(y);
2745 __ push(z);
2746 #endif
2747 __ crc32c_ipl_alg2_alt2(crc, buf, len,
2748 a, j, k,
2749 l, y, z,
2750 c_farg0, c_farg1, c_farg2,
2751 is_pclmulqdq_supported);
2752 #ifdef _WIN64
2753 __ pop(z);
2754 __ pop(y);
2755 #endif
2756 }
2757 __ movl(rax, crc);
2758 __ vzeroupper();
2759 __ leave(); // required for proper stackwalking of RuntimeStub frame
2760 __ ret(0);
2761
2762 return start;
2763 }
2764
2765
2766 /**
2767 * Arguments:
2768 *
2769 * Input:
2770 * c_rarg0 - x address
2771 * c_rarg1 - x length
2772 * c_rarg2 - y address
2773 * c_rarg3 - y length
2774 * not Win64
2775 * c_rarg4 - z address
2776 * c_rarg5 - z length
2777 * Win64
2778 * rsp+40 - z address
2779 * rsp+48 - z length
2780 */
2781 address StubGenerator::generate_multiplyToLen() {
2782 __ align(CodeEntryAlignment);
2783 StubCodeMark mark(this, "StubRoutines", "multiplyToLen");
2784 address start = __ pc();
2785
2786 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
2787 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
2788 const Register x = rdi;
2789 const Register xlen = rax;
2790 const Register y = rsi;
2791 const Register ylen = rcx;
2792 const Register z = r8;
2793 const Register zlen = r11;
2794
2795 // Next registers will be saved on stack in multiply_to_len().
2796 const Register tmp1 = r12;
2797 const Register tmp2 = r13;
2798 const Register tmp3 = r14;
2799 const Register tmp4 = r15;
2800 const Register tmp5 = rbx;
2801
2802 BLOCK_COMMENT("Entry:");
2803 __ enter(); // required for proper stackwalking of RuntimeStub frame
2804
2805 #ifndef _WIN64
2806 __ movptr(zlen, r9); // Save r9 in r11 - zlen
2807 #endif
2808 setup_arg_regs(4); // x => rdi, xlen => rsi, y => rdx
2809 // ylen => rcx, z => r8, zlen => r11
2810 // r9 and r10 may be used to save non-volatile registers
2811 #ifdef _WIN64
2812 // last 2 arguments (#4, #5) are on stack on Win64
2813 __ movptr(z, Address(rsp, 6 * wordSize));
2814 __ movptr(zlen, Address(rsp, 7 * wordSize));
2815 #endif
2816
2817 __ movptr(xlen, rsi);
2818 __ movptr(y, rdx);
2819 __ multiply_to_len(x, xlen, y, ylen, z, zlen, tmp1, tmp2, tmp3, tmp4, tmp5);
2820
2821 restore_arg_regs();
2822
2823 __ leave(); // required for proper stackwalking of RuntimeStub frame
2824 __ ret(0);
2825
2826 return start;
2827 }
2828
2829 /**
2830 * Arguments:
2831 *
2832 * Input:
2833 * c_rarg0 - obja address
2834 * c_rarg1 - objb address
2835 * c_rarg3 - length length
2836 * c_rarg4 - scale log2_array_indxscale
2837 *
2838 * Output:
2839 * rax - int >= mismatched index, < 0 bitwise complement of tail
2840 */
2841 address StubGenerator::generate_vectorizedMismatch() {
2842 __ align(CodeEntryAlignment);
2843 StubCodeMark mark(this, "StubRoutines", "vectorizedMismatch");
2844 address start = __ pc();
2845
2846 BLOCK_COMMENT("Entry:");
2847 __ enter();
2848
2849 #ifdef _WIN64 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
2850 const Register scale = c_rarg0; //rcx, will exchange with r9
2851 const Register objb = c_rarg1; //rdx
2852 const Register length = c_rarg2; //r8
2853 const Register obja = c_rarg3; //r9
2854 __ xchgq(obja, scale); //now obja and scale contains the correct contents
2855
2856 const Register tmp1 = r10;
2857 const Register tmp2 = r11;
2858 #endif
2859 #ifndef _WIN64 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
2860 const Register obja = c_rarg0; //U:rdi
2861 const Register objb = c_rarg1; //U:rsi
2862 const Register length = c_rarg2; //U:rdx
2863 const Register scale = c_rarg3; //U:rcx
2864 const Register tmp1 = r8;
2865 const Register tmp2 = r9;
2866 #endif
2867 const Register result = rax; //return value
2868 const XMMRegister vec0 = xmm0;
2869 const XMMRegister vec1 = xmm1;
2870 const XMMRegister vec2 = xmm2;
2871
2872 __ vectorized_mismatch(obja, objb, length, scale, result, tmp1, tmp2, vec0, vec1, vec2);
2873
2874 __ vzeroupper();
2875 __ leave();
2876 __ ret(0);
2877
2878 return start;
2879 }
2880
2881 /**
2882 * Arguments:
2883 *
2884 // Input:
2885 // c_rarg0 - x address
2886 // c_rarg1 - x length
2887 // c_rarg2 - z address
2888 // c_rarg3 - z length
2889 *
2890 */
2891 address StubGenerator::generate_squareToLen() {
2892
2893 __ align(CodeEntryAlignment);
2894 StubCodeMark mark(this, "StubRoutines", "squareToLen");
2895 address start = __ pc();
2896
2897 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
2898 // Unix: rdi, rsi, rdx, rcx (c_rarg0, c_rarg1, ...)
2899 const Register x = rdi;
2900 const Register len = rsi;
2901 const Register z = r8;
2902 const Register zlen = rcx;
2903
2904 const Register tmp1 = r12;
2905 const Register tmp2 = r13;
2906 const Register tmp3 = r14;
2907 const Register tmp4 = r15;
2908 const Register tmp5 = rbx;
2909
2910 BLOCK_COMMENT("Entry:");
2911 __ enter(); // required for proper stackwalking of RuntimeStub frame
2912
2913 setup_arg_regs(4); // x => rdi, len => rsi, z => rdx
2914 // zlen => rcx
2915 // r9 and r10 may be used to save non-volatile registers
2916 __ movptr(r8, rdx);
2917 __ square_to_len(x, len, z, zlen, tmp1, tmp2, tmp3, tmp4, tmp5, rdx, rax);
2918
2919 restore_arg_regs();
2920
2921 __ leave(); // required for proper stackwalking of RuntimeStub frame
2922 __ ret(0);
2923
2924 return start;
2925 }
2926
2927 address StubGenerator::generate_method_entry_barrier() {
2928 __ align(CodeEntryAlignment);
2929 StubCodeMark mark(this, "StubRoutines", "nmethod_entry_barrier");
2930 address start = __ pc();
2931
2932 Label deoptimize_label;
2933
2934 __ push(-1); // cookie, this is used for writing the new rsp when deoptimizing
2935
2936 BLOCK_COMMENT("Entry:");
2937 __ enter(); // save rbp
2938
2939 // save c_rarg0, because we want to use that value.
2940 // We could do without it but then we depend on the number of slots used by pusha
2941 __ push(c_rarg0);
2942
2943 __ lea(c_rarg0, Address(rsp, wordSize * 3)); // 1 for cookie, 1 for rbp, 1 for c_rarg0 - this should be the return address
2944
2945 __ pusha();
2946
2947 // The method may have floats as arguments, and we must spill them before calling
2948 // the VM runtime.
2949 assert(Argument::n_float_register_parameters_j == 8, "Assumption");
2950 const int xmm_size = wordSize * 2;
2951 const int xmm_spill_size = xmm_size * Argument::n_float_register_parameters_j;
2952 __ subptr(rsp, xmm_spill_size);
2953 __ movdqu(Address(rsp, xmm_size * 7), xmm7);
2954 __ movdqu(Address(rsp, xmm_size * 6), xmm6);
2955 __ movdqu(Address(rsp, xmm_size * 5), xmm5);
2956 __ movdqu(Address(rsp, xmm_size * 4), xmm4);
2957 __ movdqu(Address(rsp, xmm_size * 3), xmm3);
2958 __ movdqu(Address(rsp, xmm_size * 2), xmm2);
2959 __ movdqu(Address(rsp, xmm_size * 1), xmm1);
2960 __ movdqu(Address(rsp, xmm_size * 0), xmm0);
2961
2962 __ call_VM_leaf(CAST_FROM_FN_PTR(address, static_cast<int (*)(address*)>(BarrierSetNMethod::nmethod_stub_entry_barrier)), 1);
2963
2964 __ movdqu(xmm0, Address(rsp, xmm_size * 0));
2965 __ movdqu(xmm1, Address(rsp, xmm_size * 1));
2966 __ movdqu(xmm2, Address(rsp, xmm_size * 2));
2967 __ movdqu(xmm3, Address(rsp, xmm_size * 3));
2968 __ movdqu(xmm4, Address(rsp, xmm_size * 4));
2969 __ movdqu(xmm5, Address(rsp, xmm_size * 5));
2970 __ movdqu(xmm6, Address(rsp, xmm_size * 6));
2971 __ movdqu(xmm7, Address(rsp, xmm_size * 7));
2972 __ addptr(rsp, xmm_spill_size);
2973
2974 __ cmpl(rax, 1); // 1 means deoptimize
2975 __ jcc(Assembler::equal, deoptimize_label);
2976
2977 __ popa();
2978 __ pop(c_rarg0);
2979
2980 __ leave();
2981
2982 __ addptr(rsp, 1 * wordSize); // cookie
2983 __ ret(0);
2984
2985
2986 __ BIND(deoptimize_label);
2987
2988 __ popa();
2989 __ pop(c_rarg0);
2990
2991 __ leave();
2992
2993 // this can be taken out, but is good for verification purposes. getting a SIGSEGV
2994 // here while still having a correct stack is valuable
2995 __ testptr(rsp, Address(rsp, 0));
2996
2997 __ movptr(rsp, Address(rsp, 0)); // new rsp was written in the barrier
2998 __ jmp(Address(rsp, -1 * wordSize)); // jmp target should be callers verified_entry_point
2999
3000 return start;
3001 }
3002
3003 /**
3004 * Arguments:
3005 *
3006 * Input:
3007 * c_rarg0 - out address
3008 * c_rarg1 - in address
3009 * c_rarg2 - offset
3010 * c_rarg3 - len
3011 * not Win64
3012 * c_rarg4 - k
3013 * Win64
3014 * rsp+40 - k
3015 */
3016 address StubGenerator::generate_mulAdd() {
3017 __ align(CodeEntryAlignment);
3018 StubCodeMark mark(this, "StubRoutines", "mulAdd");
3019 address start = __ pc();
3020
3021 // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
3022 // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
3023 const Register out = rdi;
3024 const Register in = rsi;
3025 const Register offset = r11;
3026 const Register len = rcx;
3027 const Register k = r8;
3028
3029 // Next registers will be saved on stack in mul_add().
3030 const Register tmp1 = r12;
3031 const Register tmp2 = r13;
3032 const Register tmp3 = r14;
3033 const Register tmp4 = r15;
3034 const Register tmp5 = rbx;
3035
3036 BLOCK_COMMENT("Entry:");
3037 __ enter(); // required for proper stackwalking of RuntimeStub frame
3038
3039 setup_arg_regs(4); // out => rdi, in => rsi, offset => rdx
3040 // len => rcx, k => r8
3041 // r9 and r10 may be used to save non-volatile registers
3042 #ifdef _WIN64
3043 // last argument is on stack on Win64
3044 __ movl(k, Address(rsp, 6 * wordSize));
3045 #endif
3046 __ movptr(r11, rdx); // move offset in rdx to offset(r11)
3047 __ mul_add(out, in, offset, len, k, tmp1, tmp2, tmp3, tmp4, tmp5, rdx, rax);
3048
3049 restore_arg_regs();
3050
3051 __ leave(); // required for proper stackwalking of RuntimeStub frame
3052 __ ret(0);
3053
3054 return start;
3055 }
3056
3057 address StubGenerator::generate_bigIntegerRightShift() {
3058 __ align(CodeEntryAlignment);
3059 StubCodeMark mark(this, "StubRoutines", "bigIntegerRightShiftWorker");
3060 address start = __ pc();
3061
3062 Label Shift512Loop, ShiftTwo, ShiftTwoLoop, ShiftOne, Exit;
3063 // For Unix, the arguments are as follows: rdi, rsi, rdx, rcx, r8.
3064 const Register newArr = rdi;
3065 const Register oldArr = rsi;
3066 const Register newIdx = rdx;
3067 const Register shiftCount = rcx; // It was intentional to have shiftCount in rcx since it is used implicitly for shift.
3068 const Register totalNumIter = r8;
3069
3070 // For windows, we use r9 and r10 as temps to save rdi and rsi. Thus we cannot allocate them for our temps.
3071 // For everything else, we prefer using r9 and r10 since we do not have to save them before use.
3072 const Register tmp1 = r11; // Caller save.
3073 const Register tmp2 = rax; // Caller save.
3074 const Register tmp3 = WIN64_ONLY(r12) NOT_WIN64(r9); // Windows: Callee save. Linux: Caller save.
3075 const Register tmp4 = WIN64_ONLY(r13) NOT_WIN64(r10); // Windows: Callee save. Linux: Caller save.
3076 const Register tmp5 = r14; // Callee save.
3077 const Register tmp6 = r15;
3078
3079 const XMMRegister x0 = xmm0;
3080 const XMMRegister x1 = xmm1;
3081 const XMMRegister x2 = xmm2;
3082
3083 BLOCK_COMMENT("Entry:");
3084 __ enter(); // required for proper stackwalking of RuntimeStub frame
3085
3086 #ifdef _WIN64
3087 setup_arg_regs(4);
3088 // For windows, since last argument is on stack, we need to move it to the appropriate register.
3089 __ movl(totalNumIter, Address(rsp, 6 * wordSize));
3090 // Save callee save registers.
3091 __ push(tmp3);
3092 __ push(tmp4);
3093 #endif
3094 __ push(tmp5);
3095
3096 // Rename temps used throughout the code.
3097 const Register idx = tmp1;
3098 const Register nIdx = tmp2;
3099
3100 __ xorl(idx, idx);
3101
3102 // Start right shift from end of the array.
3103 // For example, if #iteration = 4 and newIdx = 1
3104 // then dest[4] = src[4] >> shiftCount | src[3] <<< (shiftCount - 32)
3105 // if #iteration = 4 and newIdx = 0
3106 // then dest[3] = src[4] >> shiftCount | src[3] <<< (shiftCount - 32)
3107 __ movl(idx, totalNumIter);
3108 __ movl(nIdx, idx);
3109 __ addl(nIdx, newIdx);
3110
3111 // If vectorization is enabled, check if the number of iterations is at least 64
3112 // If not, then go to ShifTwo processing 2 iterations
3113 if (VM_Version::supports_avx512_vbmi2()) {
3114 __ cmpptr(totalNumIter, (AVX3Threshold/64));
3115 __ jcc(Assembler::less, ShiftTwo);
3116
3117 if (AVX3Threshold < 16 * 64) {
3118 __ cmpl(totalNumIter, 16);
3119 __ jcc(Assembler::less, ShiftTwo);
3120 }
3121 __ evpbroadcastd(x0, shiftCount, Assembler::AVX_512bit);
3122 __ subl(idx, 16);
3123 __ subl(nIdx, 16);
3124 __ BIND(Shift512Loop);
3125 __ evmovdqul(x2, Address(oldArr, idx, Address::times_4, 4), Assembler::AVX_512bit);
3126 __ evmovdqul(x1, Address(oldArr, idx, Address::times_4), Assembler::AVX_512bit);
3127 __ vpshrdvd(x2, x1, x0, Assembler::AVX_512bit);
3128 __ evmovdqul(Address(newArr, nIdx, Address::times_4), x2, Assembler::AVX_512bit);
3129 __ subl(nIdx, 16);
3130 __ subl(idx, 16);
3131 __ jcc(Assembler::greaterEqual, Shift512Loop);
3132 __ addl(idx, 16);
3133 __ addl(nIdx, 16);
3134 }
3135 __ BIND(ShiftTwo);
3136 __ cmpl(idx, 2);
3137 __ jcc(Assembler::less, ShiftOne);
3138 __ subl(idx, 2);
3139 __ subl(nIdx, 2);
3140 __ BIND(ShiftTwoLoop);
3141 __ movl(tmp5, Address(oldArr, idx, Address::times_4, 8));
3142 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 4));
3143 __ movl(tmp3, Address(oldArr, idx, Address::times_4));
3144 __ shrdl(tmp5, tmp4);
3145 __ shrdl(tmp4, tmp3);
3146 __ movl(Address(newArr, nIdx, Address::times_4, 4), tmp5);
3147 __ movl(Address(newArr, nIdx, Address::times_4), tmp4);
3148 __ subl(nIdx, 2);
3149 __ subl(idx, 2);
3150 __ jcc(Assembler::greaterEqual, ShiftTwoLoop);
3151 __ addl(idx, 2);
3152 __ addl(nIdx, 2);
3153
3154 // Do the last iteration
3155 __ BIND(ShiftOne);
3156 __ cmpl(idx, 1);
3157 __ jcc(Assembler::less, Exit);
3158 __ subl(idx, 1);
3159 __ subl(nIdx, 1);
3160 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 4));
3161 __ movl(tmp3, Address(oldArr, idx, Address::times_4));
3162 __ shrdl(tmp4, tmp3);
3163 __ movl(Address(newArr, nIdx, Address::times_4), tmp4);
3164 __ BIND(Exit);
3165 __ vzeroupper();
3166 // Restore callee save registers.
3167 __ pop(tmp5);
3168 #ifdef _WIN64
3169 __ pop(tmp4);
3170 __ pop(tmp3);
3171 restore_arg_regs();
3172 #endif
3173 __ leave(); // required for proper stackwalking of RuntimeStub frame
3174 __ ret(0);
3175
3176 return start;
3177 }
3178
3179 /**
3180 * Arguments:
3181 *
3182 * Input:
3183 * c_rarg0 - newArr address
3184 * c_rarg1 - oldArr address
3185 * c_rarg2 - newIdx
3186 * c_rarg3 - shiftCount
3187 * not Win64
3188 * c_rarg4 - numIter
3189 * Win64
3190 * rsp40 - numIter
3191 */
3192 address StubGenerator::generate_bigIntegerLeftShift() {
3193 __ align(CodeEntryAlignment);
3194 StubCodeMark mark(this, "StubRoutines", "bigIntegerLeftShiftWorker");
3195 address start = __ pc();
3196
3197 Label Shift512Loop, ShiftTwo, ShiftTwoLoop, ShiftOne, Exit;
3198 // For Unix, the arguments are as follows: rdi, rsi, rdx, rcx, r8.
3199 const Register newArr = rdi;
3200 const Register oldArr = rsi;
3201 const Register newIdx = rdx;
3202 const Register shiftCount = rcx; // It was intentional to have shiftCount in rcx since it is used implicitly for shift.
3203 const Register totalNumIter = r8;
3204 // For windows, we use r9 and r10 as temps to save rdi and rsi. Thus we cannot allocate them for our temps.
3205 // For everything else, we prefer using r9 and r10 since we do not have to save them before use.
3206 const Register tmp1 = r11; // Caller save.
3207 const Register tmp2 = rax; // Caller save.
3208 const Register tmp3 = WIN64_ONLY(r12) NOT_WIN64(r9); // Windows: Callee save. Linux: Caller save.
3209 const Register tmp4 = WIN64_ONLY(r13) NOT_WIN64(r10); // Windows: Callee save. Linux: Caller save.
3210 const Register tmp5 = r14; // Callee save.
3211
3212 const XMMRegister x0 = xmm0;
3213 const XMMRegister x1 = xmm1;
3214 const XMMRegister x2 = xmm2;
3215 BLOCK_COMMENT("Entry:");
3216 __ enter(); // required for proper stackwalking of RuntimeStub frame
3217
3218 #ifdef _WIN64
3219 setup_arg_regs(4);
3220 // For windows, since last argument is on stack, we need to move it to the appropriate register.
3221 __ movl(totalNumIter, Address(rsp, 6 * wordSize));
3222 // Save callee save registers.
3223 __ push(tmp3);
3224 __ push(tmp4);
3225 #endif
3226 __ push(tmp5);
3227
3228 // Rename temps used throughout the code
3229 const Register idx = tmp1;
3230 const Register numIterTmp = tmp2;
3231
3232 // Start idx from zero.
3233 __ xorl(idx, idx);
3234 // Compute interior pointer for new array. We do this so that we can use same index for both old and new arrays.
3235 __ lea(newArr, Address(newArr, newIdx, Address::times_4));
3236 __ movl(numIterTmp, totalNumIter);
3237
3238 // If vectorization is enabled, check if the number of iterations is at least 64
3239 // If not, then go to ShiftTwo shifting two numbers at a time
3240 if (VM_Version::supports_avx512_vbmi2()) {
3241 __ cmpl(totalNumIter, (AVX3Threshold/64));
3242 __ jcc(Assembler::less, ShiftTwo);
3243
3244 if (AVX3Threshold < 16 * 64) {
3245 __ cmpl(totalNumIter, 16);
3246 __ jcc(Assembler::less, ShiftTwo);
3247 }
3248 __ evpbroadcastd(x0, shiftCount, Assembler::AVX_512bit);
3249 __ subl(numIterTmp, 16);
3250 __ BIND(Shift512Loop);
3251 __ evmovdqul(x1, Address(oldArr, idx, Address::times_4), Assembler::AVX_512bit);
3252 __ evmovdqul(x2, Address(oldArr, idx, Address::times_4, 0x4), Assembler::AVX_512bit);
3253 __ vpshldvd(x1, x2, x0, Assembler::AVX_512bit);
3254 __ evmovdqul(Address(newArr, idx, Address::times_4), x1, Assembler::AVX_512bit);
3255 __ addl(idx, 16);
3256 __ subl(numIterTmp, 16);
3257 __ jcc(Assembler::greaterEqual, Shift512Loop);
3258 __ addl(numIterTmp, 16);
3259 }
3260 __ BIND(ShiftTwo);
3261 __ cmpl(totalNumIter, 1);
3262 __ jcc(Assembler::less, Exit);
3263 __ movl(tmp3, Address(oldArr, idx, Address::times_4));
3264 __ subl(numIterTmp, 2);
3265 __ jcc(Assembler::less, ShiftOne);
3266
3267 __ BIND(ShiftTwoLoop);
3268 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 0x4));
3269 __ movl(tmp5, Address(oldArr, idx, Address::times_4, 0x8));
3270 __ shldl(tmp3, tmp4);
3271 __ shldl(tmp4, tmp5);
3272 __ movl(Address(newArr, idx, Address::times_4), tmp3);
3273 __ movl(Address(newArr, idx, Address::times_4, 0x4), tmp4);
3274 __ movl(tmp3, tmp5);
3275 __ addl(idx, 2);
3276 __ subl(numIterTmp, 2);
3277 __ jcc(Assembler::greaterEqual, ShiftTwoLoop);
3278
3279 // Do the last iteration
3280 __ BIND(ShiftOne);
3281 __ addl(numIterTmp, 2);
3282 __ cmpl(numIterTmp, 1);
3283 __ jcc(Assembler::less, Exit);
3284 __ movl(tmp4, Address(oldArr, idx, Address::times_4, 0x4));
3285 __ shldl(tmp3, tmp4);
3286 __ movl(Address(newArr, idx, Address::times_4), tmp3);
3287
3288 __ BIND(Exit);
3289 __ vzeroupper();
3290 // Restore callee save registers.
3291 __ pop(tmp5);
3292 #ifdef _WIN64
3293 __ pop(tmp4);
3294 __ pop(tmp3);
3295 restore_arg_regs();
3296 #endif
3297 __ leave(); // required for proper stackwalking of RuntimeStub frame
3298 __ ret(0);
3299
3300 return start;
3301 }
3302
3303 void StubGenerator::generate_libm_stubs() {
3304 if (UseLibmIntrinsic && InlineIntrinsics) {
3305 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dsin)) {
3306 StubRoutines::_dsin = generate_libmSin(); // from stubGenerator_x86_64_sin.cpp
3307 }
3308 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dcos)) {
3309 StubRoutines::_dcos = generate_libmCos(); // from stubGenerator_x86_64_cos.cpp
3310 }
3311 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dtan)) {
3312 StubRoutines::_dtan = generate_libmTan();
3313 }
3314 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dexp)) {
3315 StubRoutines::_dexp = generate_libmExp();
3316 }
3317 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dpow)) {
3318 StubRoutines::_dpow = generate_libmPow();
3319 }
3320 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dlog)) {
3321 StubRoutines::_dlog = generate_libmLog();
3322 }
3323 if (vmIntrinsics::is_intrinsic_available(vmIntrinsics::_dlog10)) {
3324 StubRoutines::_dlog10 = generate_libmLog10();
3325 }
3326 }
3327 }
3328
3329
3330 address StubGenerator::generate_cont_thaw(const char* label, Continuation::thaw_kind kind) {
3331 if (!Continuations::enabled()) return nullptr;
3332
3333 bool return_barrier = Continuation::is_thaw_return_barrier(kind);
3334 bool return_barrier_exception = Continuation::is_thaw_return_barrier_exception(kind);
3335
3336 StubCodeMark mark(this, "StubRoutines", label);
3337 address start = __ pc();
3338
3339 // TODO: Handle Valhalla return types. May require generating different return barriers.
3340
3341 if (!return_barrier) {
3342 // Pop return address. If we don't do this, we get a drift,
3343 // where the bottom-most frozen frame continuously grows.
3344 __ pop(c_rarg3);
3345 } else {
3346 __ movptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
3347 }
3348
3349 #ifdef ASSERT
3350 {
3351 Label L_good_sp;
3352 __ cmpptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
3353 __ jcc(Assembler::equal, L_good_sp);
3354 __ stop("Incorrect rsp at thaw entry");
3355 __ BIND(L_good_sp);
3356 }
3357 #endif // ASSERT
3358
3359 if (return_barrier) {
3360 // Preserve possible return value from a method returning to the return barrier.
3361 __ push(rax);
3362 __ push_d(xmm0);
3363 }
3364
3365 __ movptr(c_rarg0, r15_thread);
3366 __ movptr(c_rarg1, (return_barrier ? 1 : 0));
3367 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Continuation::prepare_thaw), 2);
3368 __ movptr(rbx, rax);
3369
3370 if (return_barrier) {
3371 // Restore return value from a method returning to the return barrier.
3372 // No safepoint in the call to thaw, so even an oop return value should be OK.
3373 __ pop_d(xmm0);
3374 __ pop(rax);
3375 }
3376
3377 #ifdef ASSERT
3378 {
3379 Label L_good_sp;
3380 __ cmpptr(rsp, Address(r15_thread, JavaThread::cont_entry_offset()));
3381 __ jcc(Assembler::equal, L_good_sp);
3382 __ stop("Incorrect rsp after prepare thaw");
3383 __ BIND(L_good_sp);
3384 }
3385 #endif // ASSERT
3386
3387 // rbx contains the size of the frames to thaw, 0 if overflow or no more frames
3388 Label L_thaw_success;
3389 __ testptr(rbx, rbx);
3390 __ jccb(Assembler::notZero, L_thaw_success);
3391 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
3392 __ bind(L_thaw_success);
3393
3394 // Make room for the thawed frames and align the stack.
3395 __ subptr(rsp, rbx);
3396 __ andptr(rsp, -StackAlignmentInBytes);
3397
3398 if (return_barrier) {
3399 // Preserve possible return value from a method returning to the return barrier. (Again.)
3400 __ push(rax);
3401 __ push_d(xmm0);
3402 }
3403
3404 // If we want, we can templatize thaw by kind, and have three different entries.
3405 __ movptr(c_rarg0, r15_thread);
3406 __ movptr(c_rarg1, kind);
3407 __ call_VM_leaf(Continuation::thaw_entry(), 2);
3408 __ movptr(rbx, rax);
3409
3410 if (return_barrier) {
3411 // Restore return value from a method returning to the return barrier. (Again.)
3412 // No safepoint in the call to thaw, so even an oop return value should be OK.
3413 __ pop_d(xmm0);
3414 __ pop(rax);
3415 } else {
3416 // Return 0 (success) from doYield.
3417 __ xorptr(rax, rax);
3418 }
3419
3420 // After thawing, rbx is the SP of the yielding frame.
3421 // Move there, and then to saved RBP slot.
3422 __ movptr(rsp, rbx);
3423 __ subptr(rsp, 2*wordSize);
3424
3425 if (return_barrier_exception) {
3426 __ movptr(c_rarg0, r15_thread);
3427 __ movptr(c_rarg1, Address(rsp, wordSize)); // return address
3428
3429 // rax still holds the original exception oop, save it before the call
3430 __ push(rax);
3431
3432 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), 2);
3433 __ movptr(rbx, rax);
3434
3435 // Continue at exception handler:
3436 // rax: exception oop
3437 // rbx: exception handler
3438 // rdx: exception pc
3439 __ pop(rax);
3440 __ verify_oop(rax);
3441 __ pop(rbp); // pop out RBP here too
3442 __ pop(rdx);
3443 __ jmp(rbx);
3444 } else {
3445 // We are "returning" into the topmost thawed frame; see Thaw::push_return_frame
3446 __ pop(rbp);
3447 __ ret(0);
3448 }
3449
3450 return start;
3451 }
3452
3453 address StubGenerator::generate_cont_thaw() {
3454 return generate_cont_thaw("Cont thaw", Continuation::thaw_top);
3455 }
3456
3457 // TODO: will probably need multiple return barriers depending on return type
3458
3459 address StubGenerator::generate_cont_returnBarrier() {
3460 return generate_cont_thaw("Cont thaw return barrier", Continuation::thaw_return_barrier);
3461 }
3462
3463 address StubGenerator::generate_cont_returnBarrier_exception() {
3464 return generate_cont_thaw("Cont thaw return barrier exception", Continuation::thaw_return_barrier_exception);
3465 }
3466
3467 #if INCLUDE_JFR
3468
3469 // For c2: c_rarg0 is junk, call to runtime to write a checkpoint.
3470 // It returns a jobject handle to the event writer.
3471 // The handle is dereferenced and the return value is the event writer oop.
3472 RuntimeStub* StubGenerator::generate_jfr_write_checkpoint() {
3473 enum layout {
3474 rbp_off,
3475 rbpH_off,
3476 return_off,
3477 return_off2,
3478 framesize // inclusive of return address
3479 };
3480
3481 CodeBuffer code("jfr_write_checkpoint", 512, 64);
3482 MacroAssembler* _masm = new MacroAssembler(&code);
3483 address start = __ pc();
3484
3485 __ enter();
3486 address the_pc = __ pc();
3487
3488 int frame_complete = the_pc - start;
3489
3490 __ set_last_Java_frame(rsp, rbp, the_pc, rscratch1);
3491 __ movptr(c_rarg0, r15_thread);
3492 __ call_VM_leaf(CAST_FROM_FN_PTR(address, JfrIntrinsicSupport::write_checkpoint), 1);
3493 __ reset_last_Java_frame(true);
3494
3495 // rax is jobject handle result, unpack and process it through a barrier.
3496 Label L_null_jobject;
3497 __ testptr(rax, rax);
3498 __ jcc(Assembler::zero, L_null_jobject);
3499
3500 BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler();
3501 bs->load_at(_masm, ACCESS_READ | IN_NATIVE, T_OBJECT, rax, Address(rax, 0), c_rarg0, r15_thread);
3502
3503 __ bind(L_null_jobject);
3504
3505 __ leave();
3506 __ ret(0);
3507
3508 OopMapSet* oop_maps = new OopMapSet();
3509 OopMap* map = new OopMap(framesize, 1);
3510 oop_maps->add_gc_map(frame_complete, map);
3511
3512 RuntimeStub* stub =
3513 RuntimeStub::new_runtime_stub(code.name(),
3514 &code,
3515 frame_complete,
3516 (framesize >> (LogBytesPerWord - LogBytesPerInt)),
3517 oop_maps,
3518 false);
3519 return stub;
3520 }
3521
3522 #endif // INCLUDE_JFR
3523
3524 // Continuation point for throwing of implicit exceptions that are
3525 // not handled in the current activation. Fabricates an exception
3526 // oop and initiates normal exception dispatching in this
3527 // frame. Since we need to preserve callee-saved values (currently
3528 // only for C2, but done for C1 as well) we need a callee-saved oop
3529 // map and therefore have to make these stubs into RuntimeStubs
3530 // rather than BufferBlobs. If the compiler needs all registers to
3531 // be preserved between the fault point and the exception handler
3532 // then it must assume responsibility for that in
3533 // AbstractCompiler::continuation_for_implicit_null_exception or
3534 // continuation_for_implicit_division_by_zero_exception. All other
3535 // implicit exceptions (e.g., NullPointerException or
3536 // AbstractMethodError on entry) are either at call sites or
3537 // otherwise assume that stack unwinding will be initiated, so
3538 // caller saved registers were assumed volatile in the compiler.
3539 address StubGenerator::generate_throw_exception(const char* name,
3540 address runtime_entry,
3541 Register arg1,
3542 Register arg2) {
3543 // Information about frame layout at time of blocking runtime call.
3544 // Note that we only have to preserve callee-saved registers since
3545 // the compilers are responsible for supplying a continuation point
3546 // if they expect all registers to be preserved.
3547 enum layout {
3548 rbp_off = frame::arg_reg_save_area_bytes/BytesPerInt,
3549 rbp_off2,
3550 return_off,
3551 return_off2,
3552 framesize // inclusive of return address
3553 };
3554
3555 int insts_size = 512;
3556 int locs_size = 64;
3557
3558 CodeBuffer code(name, insts_size, locs_size);
3559 OopMapSet* oop_maps = new OopMapSet();
3560 MacroAssembler* _masm = new MacroAssembler(&code);
3561
3562 address start = __ pc();
3563
3564 // This is an inlined and slightly modified version of call_VM
3565 // which has the ability to fetch the return PC out of
3566 // thread-local storage and also sets up last_Java_sp slightly
3567 // differently than the real call_VM
3568
3569 __ enter(); // required for proper stackwalking of RuntimeStub frame
3570
3571 assert(is_even(framesize/2), "sp not 16-byte aligned");
3572
3573 // return address and rbp are already in place
3574 __ subptr(rsp, (framesize-4) << LogBytesPerInt); // prolog
3575
3576 int frame_complete = __ pc() - start;
3577
3578 // Set up last_Java_sp and last_Java_fp
3579 address the_pc = __ pc();
3580 __ set_last_Java_frame(rsp, rbp, the_pc, rscratch1);
3581 __ andptr(rsp, -(StackAlignmentInBytes)); // Align stack
3582
3583 // Call runtime
3584 if (arg1 != noreg) {
3585 assert(arg2 != c_rarg1, "clobbered");
3586 __ movptr(c_rarg1, arg1);
3587 }
3588 if (arg2 != noreg) {
3589 __ movptr(c_rarg2, arg2);
3590 }
3591 __ movptr(c_rarg0, r15_thread);
3592 BLOCK_COMMENT("call runtime_entry");
3593 __ call(RuntimeAddress(runtime_entry));
3594
3595 // Generate oop map
3596 OopMap* map = new OopMap(framesize, 0);
3597
3598 oop_maps->add_gc_map(the_pc - start, map);
3599
3600 __ reset_last_Java_frame(true);
3601
3602 __ leave(); // required for proper stackwalking of RuntimeStub frame
3603
3604 // check for pending exceptions
3605 #ifdef ASSERT
3606 Label L;
3607 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), NULL_WORD);
3608 __ jcc(Assembler::notEqual, L);
3609 __ should_not_reach_here();
3610 __ bind(L);
3611 #endif // ASSERT
3612 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
3613
3614
3615 // codeBlob framesize is in words (not VMRegImpl::slot_size)
3616 RuntimeStub* stub =
3617 RuntimeStub::new_runtime_stub(name,
3618 &code,
3619 frame_complete,
3620 (framesize >> (LogBytesPerWord - LogBytesPerInt)),
3621 oop_maps, false);
3622 return stub->entry_point();
3623 }
3624
3625 void StubGenerator::create_control_words() {
3626 // Round to nearest, 64-bit mode, exceptions masked
3627 StubRoutines::x86::_mxcsr_std = 0x1F80;
3628 }
3629
3630 // Initialization
3631 void StubGenerator::generate_initial() {
3632 // Generates all stubs and initializes the entry points
3633
3634 // This platform-specific settings are needed by generate_call_stub()
3635 create_control_words();
3636
3637 // entry points that exist in all platforms Note: This is code
3638 // that could be shared among different platforms - however the
3639 // benefit seems to be smaller than the disadvantage of having a
3640 // much more complicated generator structure. See also comment in
3641 // stubRoutines.hpp.
3642
3643 StubRoutines::_forward_exception_entry = generate_forward_exception();
3644
3645 // Generate these first because they are called from other stubs
3646 if (InlineTypeReturnedAsFields) {
3647 StubRoutines::_load_inline_type_fields_in_regs =
3648 generate_return_value_stub(CAST_FROM_FN_PTR(address, SharedRuntime::load_inline_type_fields_in_regs),
3649 "load_inline_type_fields_in_regs", false);
3650 StubRoutines::_store_inline_type_fields_to_buf =
3651 generate_return_value_stub(CAST_FROM_FN_PTR(address, SharedRuntime::store_inline_type_fields_to_buf),
3652 "store_inline_type_fields_to_buf", true);
3653 }
3654
3655 StubRoutines::_call_stub_entry =
3656 generate_call_stub(StubRoutines::_call_stub_return_address);
3657
3658 // is referenced by megamorphic call
3659 StubRoutines::_catch_exception_entry = generate_catch_exception();
3660
3661 // atomic calls
3662 StubRoutines::_fence_entry = generate_orderaccess_fence();
3663
3664 // platform dependent
3665 StubRoutines::x86::_get_previous_sp_entry = generate_get_previous_sp();
3666
3667 StubRoutines::x86::_verify_mxcsr_entry = generate_verify_mxcsr();
3668
3669 StubRoutines::x86::_f2i_fixup = generate_f2i_fixup();
3670 StubRoutines::x86::_f2l_fixup = generate_f2l_fixup();
3671 StubRoutines::x86::_d2i_fixup = generate_d2i_fixup();
3672 StubRoutines::x86::_d2l_fixup = generate_d2l_fixup();
3673
3674 StubRoutines::x86::_float_sign_mask = generate_fp_mask("float_sign_mask", 0x7FFFFFFF7FFFFFFF);
3675 StubRoutines::x86::_float_sign_flip = generate_fp_mask("float_sign_flip", 0x8000000080000000);
3676 StubRoutines::x86::_double_sign_mask = generate_fp_mask("double_sign_mask", 0x7FFFFFFFFFFFFFFF);
3677 StubRoutines::x86::_double_sign_flip = generate_fp_mask("double_sign_flip", 0x8000000000000000);
3678
3679 // Build this early so it's available for the interpreter.
3680 StubRoutines::_throw_StackOverflowError_entry =
3681 generate_throw_exception("StackOverflowError throw_exception",
3682 CAST_FROM_FN_PTR(address,
3683 SharedRuntime::
3684 throw_StackOverflowError));
3685 StubRoutines::_throw_delayed_StackOverflowError_entry =
3686 generate_throw_exception("delayed StackOverflowError throw_exception",
3687 CAST_FROM_FN_PTR(address,
3688 SharedRuntime::
3689 throw_delayed_StackOverflowError));
3690 if (UseCRC32Intrinsics) {
3691 // set table address before stub generation which use it
3692 StubRoutines::_crc_table_adr = (address)StubRoutines::x86::_crc_table;
3693 StubRoutines::_updateBytesCRC32 = generate_updateBytesCRC32();
3694 }
3695
3696 if (UseCRC32CIntrinsics) {
3697 bool supports_clmul = VM_Version::supports_clmul();
3698 StubRoutines::x86::generate_CRC32C_table(supports_clmul);
3699 StubRoutines::_crc32c_table_addr = (address)StubRoutines::x86::_crc32c_table;
3700 StubRoutines::_updateBytesCRC32C = generate_updateBytesCRC32C(supports_clmul);
3701 }
3702
3703 if (UseAdler32Intrinsics) {
3704 StubRoutines::_updateBytesAdler32 = generate_updateBytesAdler32();
3705 }
3706 }
3707
3708 // Call here from the interpreter or compiled code to either load
3709 // multiple returned values from the inline type instance being
3710 // returned to registers or to store returned values to a newly
3711 // allocated inline type instance.
3712 // Register is a class, but it would be assigned numerical value.
3713 // "0" is assigned for xmm0. Thus we need to ignore -Wnonnull.
3714 PRAGMA_DIAG_PUSH
3715 PRAGMA_NONNULL_IGNORED
3716 address StubGenerator::generate_return_value_stub(address destination, const char* name, bool has_res) {
3717 // We need to save all registers the calling convention may use so
3718 // the runtime calls read or update those registers. This needs to
3719 // be in sync with SharedRuntime::java_return_convention().
3720 enum layout {
3721 pad_off = frame::arg_reg_save_area_bytes/BytesPerInt, pad_off_2,
3722 rax_off, rax_off_2,
3723 j_rarg5_off, j_rarg5_2,
3724 j_rarg4_off, j_rarg4_2,
3725 j_rarg3_off, j_rarg3_2,
3726 j_rarg2_off, j_rarg2_2,
3727 j_rarg1_off, j_rarg1_2,
3728 j_rarg0_off, j_rarg0_2,
3729 j_farg0_off, j_farg0_2,
3730 j_farg1_off, j_farg1_2,
3731 j_farg2_off, j_farg2_2,
3732 j_farg3_off, j_farg3_2,
3733 j_farg4_off, j_farg4_2,
3734 j_farg5_off, j_farg5_2,
3735 j_farg6_off, j_farg6_2,
3736 j_farg7_off, j_farg7_2,
3737 rbp_off, rbp_off_2,
3738 return_off, return_off_2,
3739
3740 framesize
3741 };
3742
3743 CodeBuffer buffer(name, 1000, 512);
3744 MacroAssembler* _masm = new MacroAssembler(&buffer);
3745
3746 int frame_size_in_bytes = align_up(framesize*BytesPerInt, 16);
3747 assert(frame_size_in_bytes == framesize*BytesPerInt, "misaligned");
3748 int frame_size_in_slots = frame_size_in_bytes / BytesPerInt;
3749 int frame_size_in_words = frame_size_in_bytes / wordSize;
3750
3751 OopMapSet *oop_maps = new OopMapSet();
3752 OopMap* map = new OopMap(frame_size_in_slots, 0);
3753
3754 map->set_callee_saved(VMRegImpl::stack2reg(rax_off), rax->as_VMReg());
3755 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg5_off), j_rarg5->as_VMReg());
3756 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg4_off), j_rarg4->as_VMReg());
3757 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg3_off), j_rarg3->as_VMReg());
3758 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg2_off), j_rarg2->as_VMReg());
3759 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg1_off), j_rarg1->as_VMReg());
3760 map->set_callee_saved(VMRegImpl::stack2reg(j_rarg0_off), j_rarg0->as_VMReg());
3761 map->set_callee_saved(VMRegImpl::stack2reg(j_farg0_off), j_farg0->as_VMReg());
3762 map->set_callee_saved(VMRegImpl::stack2reg(j_farg1_off), j_farg1->as_VMReg());
3763 map->set_callee_saved(VMRegImpl::stack2reg(j_farg2_off), j_farg2->as_VMReg());
3764 map->set_callee_saved(VMRegImpl::stack2reg(j_farg3_off), j_farg3->as_VMReg());
3765 map->set_callee_saved(VMRegImpl::stack2reg(j_farg4_off), j_farg4->as_VMReg());
3766 map->set_callee_saved(VMRegImpl::stack2reg(j_farg5_off), j_farg5->as_VMReg());
3767 map->set_callee_saved(VMRegImpl::stack2reg(j_farg6_off), j_farg6->as_VMReg());
3768 map->set_callee_saved(VMRegImpl::stack2reg(j_farg7_off), j_farg7->as_VMReg());
3769
3770 int start = __ offset();
3771
3772 __ subptr(rsp, frame_size_in_bytes - 8 /* return address*/);
3773
3774 __ movptr(Address(rsp, rbp_off * BytesPerInt), rbp);
3775 __ movdbl(Address(rsp, j_farg7_off * BytesPerInt), j_farg7);
3776 __ movdbl(Address(rsp, j_farg6_off * BytesPerInt), j_farg6);
3777 __ movdbl(Address(rsp, j_farg5_off * BytesPerInt), j_farg5);
3778 __ movdbl(Address(rsp, j_farg4_off * BytesPerInt), j_farg4);
3779 __ movdbl(Address(rsp, j_farg3_off * BytesPerInt), j_farg3);
3780 __ movdbl(Address(rsp, j_farg2_off * BytesPerInt), j_farg2);
3781 __ movdbl(Address(rsp, j_farg1_off * BytesPerInt), j_farg1);
3782 __ movdbl(Address(rsp, j_farg0_off * BytesPerInt), j_farg0);
3783
3784 __ movptr(Address(rsp, j_rarg0_off * BytesPerInt), j_rarg0);
3785 __ movptr(Address(rsp, j_rarg1_off * BytesPerInt), j_rarg1);
3786 __ movptr(Address(rsp, j_rarg2_off * BytesPerInt), j_rarg2);
3787 __ movptr(Address(rsp, j_rarg3_off * BytesPerInt), j_rarg3);
3788 __ movptr(Address(rsp, j_rarg4_off * BytesPerInt), j_rarg4);
3789 __ movptr(Address(rsp, j_rarg5_off * BytesPerInt), j_rarg5);
3790 __ movptr(Address(rsp, rax_off * BytesPerInt), rax);
3791
3792 int frame_complete = __ offset();
3793
3794 __ set_last_Java_frame(noreg, noreg, NULL, rscratch1);
3795
3796 __ mov(c_rarg0, r15_thread);
3797 __ mov(c_rarg1, rax);
3798
3799 __ call(RuntimeAddress(destination));
3800
3801 // Set an oopmap for the call site.
3802
3803 oop_maps->add_gc_map( __ offset() - start, map);
3804
3805 // clear last_Java_sp
3806 __ reset_last_Java_frame(false);
3807
3808 __ movptr(rbp, Address(rsp, rbp_off * BytesPerInt));
3809 __ movdbl(j_farg7, Address(rsp, j_farg7_off * BytesPerInt));
3810 __ movdbl(j_farg6, Address(rsp, j_farg6_off * BytesPerInt));
3811 __ movdbl(j_farg5, Address(rsp, j_farg5_off * BytesPerInt));
3812 __ movdbl(j_farg4, Address(rsp, j_farg4_off * BytesPerInt));
3813 __ movdbl(j_farg3, Address(rsp, j_farg3_off * BytesPerInt));
3814 __ movdbl(j_farg2, Address(rsp, j_farg2_off * BytesPerInt));
3815 __ movdbl(j_farg1, Address(rsp, j_farg1_off * BytesPerInt));
3816 __ movdbl(j_farg0, Address(rsp, j_farg0_off * BytesPerInt));
3817
3818 __ movptr(j_rarg0, Address(rsp, j_rarg0_off * BytesPerInt));
3819 __ movptr(j_rarg1, Address(rsp, j_rarg1_off * BytesPerInt));
3820 __ movptr(j_rarg2, Address(rsp, j_rarg2_off * BytesPerInt));
3821 __ movptr(j_rarg3, Address(rsp, j_rarg3_off * BytesPerInt));
3822 __ movptr(j_rarg4, Address(rsp, j_rarg4_off * BytesPerInt));
3823 __ movptr(j_rarg5, Address(rsp, j_rarg5_off * BytesPerInt));
3824 __ movptr(rax, Address(rsp, rax_off * BytesPerInt));
3825
3826 __ addptr(rsp, frame_size_in_bytes-8);
3827
3828 // check for pending exceptions
3829 Label pending;
3830 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
3831 __ jcc(Assembler::notEqual, pending);
3832
3833 if (has_res) {
3834 __ get_vm_result(rax, r15_thread);
3835 }
3836
3837 __ ret(0);
3838
3839 __ bind(pending);
3840
3841 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset()));
3842 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
3843
3844 // -------------
3845 // make sure all code is generated
3846 _masm->flush();
3847
3848 RuntimeStub* stub = RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_in_words, oop_maps, false);
3849 return stub->entry_point();
3850 }
3851
3852 void StubGenerator::generate_phase1() {
3853 // Continuation stubs:
3854 StubRoutines::_cont_thaw = generate_cont_thaw();
3855 StubRoutines::_cont_returnBarrier = generate_cont_returnBarrier();
3856 StubRoutines::_cont_returnBarrierExc = generate_cont_returnBarrier_exception();
3857
3858 JFR_ONLY(StubRoutines::_jfr_write_checkpoint_stub = generate_jfr_write_checkpoint();)
3859 JFR_ONLY(StubRoutines::_jfr_write_checkpoint = StubRoutines::_jfr_write_checkpoint_stub->entry_point();)
3860 }
3861
3862 void StubGenerator::generate_all() {
3863 // Generates all stubs and initializes the entry points
3864
3865 // These entry points require SharedInfo::stack0 to be set up in
3866 // non-core builds and need to be relocatable, so they each
3867 // fabricate a RuntimeStub internally.
3868 StubRoutines::_throw_AbstractMethodError_entry =
3869 generate_throw_exception("AbstractMethodError throw_exception",
3870 CAST_FROM_FN_PTR(address,
3871 SharedRuntime::
3872 throw_AbstractMethodError));
3873
3874 StubRoutines::_throw_IncompatibleClassChangeError_entry =
3875 generate_throw_exception("IncompatibleClassChangeError throw_exception",
3876 CAST_FROM_FN_PTR(address,
3877 SharedRuntime::
3878 throw_IncompatibleClassChangeError));
3879
3880 StubRoutines::_throw_NullPointerException_at_call_entry =
3881 generate_throw_exception("NullPointerException at call throw_exception",
3882 CAST_FROM_FN_PTR(address,
3883 SharedRuntime::
3884 throw_NullPointerException_at_call));
3885
3886 // entry points that are platform specific
3887 StubRoutines::x86::_vector_float_sign_mask = generate_vector_mask("vector_float_sign_mask", 0x7FFFFFFF7FFFFFFF);
3888 StubRoutines::x86::_vector_float_sign_flip = generate_vector_mask("vector_float_sign_flip", 0x8000000080000000);
3889 StubRoutines::x86::_vector_double_sign_mask = generate_vector_mask("vector_double_sign_mask", 0x7FFFFFFFFFFFFFFF);
3890 StubRoutines::x86::_vector_double_sign_flip = generate_vector_mask("vector_double_sign_flip", 0x8000000000000000);
3891 StubRoutines::x86::_vector_all_bits_set = generate_vector_mask("vector_all_bits_set", 0xFFFFFFFFFFFFFFFF);
3892 StubRoutines::x86::_vector_int_mask_cmp_bits = generate_vector_mask("vector_int_mask_cmp_bits", 0x0000000100000001);
3893 StubRoutines::x86::_vector_short_to_byte_mask = generate_vector_mask("vector_short_to_byte_mask", 0x00ff00ff00ff00ff);
3894 StubRoutines::x86::_vector_byte_perm_mask = generate_vector_byte_perm_mask("vector_byte_perm_mask");
3895 StubRoutines::x86::_vector_int_to_byte_mask = generate_vector_mask("vector_int_to_byte_mask", 0x000000ff000000ff);
3896 StubRoutines::x86::_vector_int_to_short_mask = generate_vector_mask("vector_int_to_short_mask", 0x0000ffff0000ffff);
3897 StubRoutines::x86::_vector_32_bit_mask = generate_vector_custom_i32("vector_32_bit_mask", Assembler::AVX_512bit,
3898 0xFFFFFFFF, 0, 0, 0);
3899 StubRoutines::x86::_vector_64_bit_mask = generate_vector_custom_i32("vector_64_bit_mask", Assembler::AVX_512bit,
3900 0xFFFFFFFF, 0xFFFFFFFF, 0, 0);
3901 StubRoutines::x86::_vector_int_shuffle_mask = generate_vector_mask("vector_int_shuffle_mask", 0x0302010003020100);
3902 StubRoutines::x86::_vector_byte_shuffle_mask = generate_vector_byte_shuffle_mask("vector_byte_shuffle_mask");
3903 StubRoutines::x86::_vector_short_shuffle_mask = generate_vector_mask("vector_short_shuffle_mask", 0x0100010001000100);
3904 StubRoutines::x86::_vector_long_shuffle_mask = generate_vector_mask("vector_long_shuffle_mask", 0x0000000100000000);
3905 StubRoutines::x86::_vector_long_sign_mask = generate_vector_mask("vector_long_sign_mask", 0x8000000000000000);
3906 StubRoutines::x86::_vector_iota_indices = generate_iota_indices("iota_indices");
3907 StubRoutines::x86::_vector_count_leading_zeros_lut = generate_count_leading_zeros_lut("count_leading_zeros_lut");
3908 StubRoutines::x86::_vector_reverse_bit_lut = generate_vector_reverse_bit_lut("reverse_bit_lut");
3909 StubRoutines::x86::_vector_reverse_byte_perm_mask_long = generate_vector_reverse_byte_perm_mask_long("perm_mask_long");
3910 StubRoutines::x86::_vector_reverse_byte_perm_mask_int = generate_vector_reverse_byte_perm_mask_int("perm_mask_int");
3911 StubRoutines::x86::_vector_reverse_byte_perm_mask_short = generate_vector_reverse_byte_perm_mask_short("perm_mask_short");
3912
3913 if (VM_Version::supports_avx2() && !VM_Version::supports_avx512_vpopcntdq()) {
3914 // lut implementation influenced by counting 1s algorithm from section 5-1 of Hackers' Delight.
3915 StubRoutines::x86::_vector_popcount_lut = generate_popcount_avx_lut("popcount_lut");
3916 }
3917
3918 // support for verify_oop (must happen after universe_init)
3919 if (VerifyOops) {
3920 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop();
3921 }
3922
3923 // data cache line writeback
3924 StubRoutines::_data_cache_writeback = generate_data_cache_writeback();
3925 StubRoutines::_data_cache_writeback_sync = generate_data_cache_writeback_sync();
3926
3927 // arraycopy stubs used by compilers
3928 generate_arraycopy_stubs();
3929
3930 generate_aes_stubs();
3931
3932 generate_ghash_stubs();
3933
3934 if (UseMD5Intrinsics) {
3935 StubRoutines::_md5_implCompress = generate_md5_implCompress(false, "md5_implCompress");
3936 StubRoutines::_md5_implCompressMB = generate_md5_implCompress(true, "md5_implCompressMB");
3937 }
3938 if (UseSHA1Intrinsics) {
3939 StubRoutines::x86::_upper_word_mask_addr = generate_upper_word_mask();
3940 StubRoutines::x86::_shuffle_byte_flip_mask_addr = generate_shuffle_byte_flip_mask();
3941 StubRoutines::_sha1_implCompress = generate_sha1_implCompress(false, "sha1_implCompress");
3942 StubRoutines::_sha1_implCompressMB = generate_sha1_implCompress(true, "sha1_implCompressMB");
3943 }
3944 if (UseSHA256Intrinsics) {
3945 StubRoutines::x86::_k256_adr = (address)StubRoutines::x86::_k256;
3946 char* dst = (char*)StubRoutines::x86::_k256_W;
3947 char* src = (char*)StubRoutines::x86::_k256;
3948 for (int ii = 0; ii < 16; ++ii) {
3949 memcpy(dst + 32 * ii, src + 16 * ii, 16);
3950 memcpy(dst + 32 * ii + 16, src + 16 * ii, 16);
3951 }
3952 StubRoutines::x86::_k256_W_adr = (address)StubRoutines::x86::_k256_W;
3953 StubRoutines::x86::_pshuffle_byte_flip_mask_addr = generate_pshuffle_byte_flip_mask();
3954 StubRoutines::_sha256_implCompress = generate_sha256_implCompress(false, "sha256_implCompress");
3955 StubRoutines::_sha256_implCompressMB = generate_sha256_implCompress(true, "sha256_implCompressMB");
3956 }
3957 if (UseSHA512Intrinsics) {
3958 StubRoutines::x86::_k512_W_addr = (address)StubRoutines::x86::_k512_W;
3959 StubRoutines::x86::_pshuffle_byte_flip_mask_addr_sha512 = generate_pshuffle_byte_flip_mask_sha512();
3960 StubRoutines::_sha512_implCompress = generate_sha512_implCompress(false, "sha512_implCompress");
3961 StubRoutines::_sha512_implCompressMB = generate_sha512_implCompress(true, "sha512_implCompressMB");
3962 }
3963
3964 if (UseBASE64Intrinsics) {
3965 if(VM_Version::supports_avx2() &&
3966 VM_Version::supports_avx512bw() &&
3967 VM_Version::supports_avx512vl()) {
3968 StubRoutines::x86::_avx2_shuffle_base64 = base64_avx2_shuffle_addr();
3969 StubRoutines::x86::_avx2_input_mask_base64 = base64_avx2_input_mask_addr();
3970 StubRoutines::x86::_avx2_lut_base64 = base64_avx2_lut_addr();
3971 }
3972 StubRoutines::x86::_encoding_table_base64 = base64_encoding_table_addr();
3973 if (VM_Version::supports_avx512_vbmi()) {
3974 StubRoutines::x86::_shuffle_base64 = base64_shuffle_addr();
3975 StubRoutines::x86::_lookup_lo_base64 = base64_vbmi_lookup_lo_addr();
3976 StubRoutines::x86::_lookup_hi_base64 = base64_vbmi_lookup_hi_addr();
3977 StubRoutines::x86::_lookup_lo_base64url = base64_vbmi_lookup_lo_url_addr();
3978 StubRoutines::x86::_lookup_hi_base64url = base64_vbmi_lookup_hi_url_addr();
3979 StubRoutines::x86::_pack_vec_base64 = base64_vbmi_pack_vec_addr();
3980 StubRoutines::x86::_join_0_1_base64 = base64_vbmi_join_0_1_addr();
3981 StubRoutines::x86::_join_1_2_base64 = base64_vbmi_join_1_2_addr();
3982 StubRoutines::x86::_join_2_3_base64 = base64_vbmi_join_2_3_addr();
3983 }
3984 StubRoutines::x86::_decoding_table_base64 = base64_decoding_table_addr();
3985 StubRoutines::_base64_encodeBlock = generate_base64_encodeBlock();
3986 StubRoutines::_base64_decodeBlock = generate_base64_decodeBlock();
3987 }
3988
3989 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
3990 if (bs_nm != NULL) {
3991 StubRoutines::x86::_method_entry_barrier = generate_method_entry_barrier();
3992 }
3993 #ifdef COMPILER2
3994 if (UseMultiplyToLenIntrinsic) {
3995 StubRoutines::_multiplyToLen = generate_multiplyToLen();
3996 }
3997 if (UseSquareToLenIntrinsic) {
3998 StubRoutines::_squareToLen = generate_squareToLen();
3999 }
4000 if (UseMulAddIntrinsic) {
4001 StubRoutines::_mulAdd = generate_mulAdd();
4002 }
4003 if (VM_Version::supports_avx512_vbmi2()) {
4004 StubRoutines::_bigIntegerRightShiftWorker = generate_bigIntegerRightShift();
4005 StubRoutines::_bigIntegerLeftShiftWorker = generate_bigIntegerLeftShift();
4006 }
4007 if (UseMontgomeryMultiplyIntrinsic) {
4008 StubRoutines::_montgomeryMultiply
4009 = CAST_FROM_FN_PTR(address, SharedRuntime::montgomery_multiply);
4010 }
4011 if (UseMontgomerySquareIntrinsic) {
4012 StubRoutines::_montgomerySquare
4013 = CAST_FROM_FN_PTR(address, SharedRuntime::montgomery_square);
4014 }
4015
4016 // Get svml stub routine addresses
4017 void *libjsvml = NULL;
4018 char ebuf[1024];
4019 char dll_name[JVM_MAXPATHLEN];
4020 if (os::dll_locate_lib(dll_name, sizeof(dll_name), Arguments::get_dll_dir(), "jsvml")) {
4021 libjsvml = os::dll_load(dll_name, ebuf, sizeof ebuf);
4022 }
4023 if (libjsvml != NULL) {
4024 // SVML method naming convention
4025 // All the methods are named as __jsvml_op<T><N>_ha_<VV>
4026 // Where:
4027 // ha stands for high accuracy
4028 // <T> is optional to indicate float/double
4029 // Set to f for vector float operation
4030 // Omitted for vector double operation
4031 // <N> is the number of elements in the vector
4032 // 1, 2, 4, 8, 16
4033 // e.g. 128 bit float vector has 4 float elements
4034 // <VV> indicates the avx/sse level:
4035 // z0 is AVX512, l9 is AVX2, e9 is AVX1 and ex is for SSE2
4036 // e.g. __jsvml_expf16_ha_z0 is the method for computing 16 element vector float exp using AVX 512 insns
4037 // __jsvml_exp8_ha_z0 is the method for computing 8 element vector double exp using AVX 512 insns
4038
4039 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, JNI_LIB_PREFIX "jsvml" JNI_LIB_SUFFIX, p2i(libjsvml));
4040 if (UseAVX > 2) {
4041 for (int op = 0; op < VectorSupport::NUM_SVML_OP; op++) {
4042 int vop = VectorSupport::VECTOR_OP_SVML_START + op;
4043 if ((!VM_Version::supports_avx512dq()) &&
4044 (vop == VectorSupport::VECTOR_OP_LOG || vop == VectorSupport::VECTOR_OP_LOG10 || vop == VectorSupport::VECTOR_OP_POW)) {
4045 continue;
4046 }
4047 snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf16_ha_z0", VectorSupport::svmlname[op]);
4048 StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_512][op] = (address)os::dll_lookup(libjsvml, ebuf);
4049
4050 snprintf(ebuf, sizeof(ebuf), "__jsvml_%s8_ha_z0", VectorSupport::svmlname[op]);
4051 StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_512][op] = (address)os::dll_lookup(libjsvml, ebuf);
4052 }
4053 }
4054 const char* avx_sse_str = (UseAVX >= 2) ? "l9" : ((UseAVX == 1) ? "e9" : "ex");
4055 for (int op = 0; op < VectorSupport::NUM_SVML_OP; op++) {
4056 int vop = VectorSupport::VECTOR_OP_SVML_START + op;
4057 if (vop == VectorSupport::VECTOR_OP_POW) {
4058 continue;
4059 }
4060 snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf4_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4061 StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_64][op] = (address)os::dll_lookup(libjsvml, ebuf);
4062
4063 snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf4_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4064 StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_128][op] = (address)os::dll_lookup(libjsvml, ebuf);
4065
4066 snprintf(ebuf, sizeof(ebuf), "__jsvml_%sf8_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4067 StubRoutines::_vector_f_math[VectorSupport::VEC_SIZE_256][op] = (address)os::dll_lookup(libjsvml, ebuf);
4068
4069 snprintf(ebuf, sizeof(ebuf), "__jsvml_%s1_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4070 StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_64][op] = (address)os::dll_lookup(libjsvml, ebuf);
4071
4072 snprintf(ebuf, sizeof(ebuf), "__jsvml_%s2_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4073 StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_128][op] = (address)os::dll_lookup(libjsvml, ebuf);
4074
4075 snprintf(ebuf, sizeof(ebuf), "__jsvml_%s4_ha_%s", VectorSupport::svmlname[op], avx_sse_str);
4076 StubRoutines::_vector_d_math[VectorSupport::VEC_SIZE_256][op] = (address)os::dll_lookup(libjsvml, ebuf);
4077 }
4078 }
4079 #endif // COMPILER2
4080
4081 if (UseVectorizedMismatchIntrinsic) {
4082 StubRoutines::_vectorizedMismatch = generate_vectorizedMismatch();
4083 }
4084 }
4085
4086 void StubGenerator_generate(CodeBuffer* code, int phase) {
4087 if (UnsafeCopyMemory::_table == NULL) {
4088 UnsafeCopyMemory::create_table(16);
4089 }
4090 StubGenerator g(code, phase);
4091 }
4092
4093 #undef __