Mercurial > hg > truffle
annotate src/cpu/x86/vm/stubGenerator_x86_64.cpp @ 2093:7514897db238
7009849: C1: Incorrect frame size computation
Summary: Fix frame size computation
Reviewed-by: phh, kvn
author | iveresov |
---|---|
date | Thu, 30 Dec 2010 23:44:45 -0800 |
parents | bbefa3ca1543 |
children | d89a22843c62 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "asm/assembler.hpp" | |
27 #include "assembler_x86.inline.hpp" | |
28 #include "interpreter/interpreter.hpp" | |
29 #include "nativeInst_x86.hpp" | |
30 #include "oops/instanceOop.hpp" | |
31 #include "oops/methodOop.hpp" | |
32 #include "oops/objArrayKlass.hpp" | |
33 #include "oops/oop.inline.hpp" | |
34 #include "prims/methodHandles.hpp" | |
35 #include "runtime/frame.inline.hpp" | |
36 #include "runtime/handles.inline.hpp" | |
37 #include "runtime/sharedRuntime.hpp" | |
38 #include "runtime/stubCodeGenerator.hpp" | |
39 #include "runtime/stubRoutines.hpp" | |
40 #include "utilities/top.hpp" | |
41 #ifdef TARGET_OS_FAMILY_linux | |
42 # include "thread_linux.inline.hpp" | |
43 #endif | |
44 #ifdef TARGET_OS_FAMILY_solaris | |
45 # include "thread_solaris.inline.hpp" | |
46 #endif | |
47 #ifdef TARGET_OS_FAMILY_windows | |
48 # include "thread_windows.inline.hpp" | |
49 #endif | |
50 #ifdef COMPILER2 | |
51 #include "opto/runtime.hpp" | |
52 #endif | |
0 | 53 |
54 // Declaration and definition of StubGenerator (no .hpp file). | |
55 // For a more detailed description of the stub routine structure | |
56 // see the comment in stubRoutines.hpp | |
57 | |
58 #define __ _masm-> | |
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59 #define TIMES_OOP (UseCompressedOops ? Address::times_4 : Address::times_8) |
304 | 60 #define a__ ((Assembler*)_masm)-> |
0 | 61 |
62 #ifdef PRODUCT | |
63 #define BLOCK_COMMENT(str) /* nothing */ | |
64 #else | |
65 #define BLOCK_COMMENT(str) __ block_comment(str) | |
66 #endif | |
67 | |
68 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") | |
69 const int MXCSR_MASK = 0xFFC0; // Mask out any pending exceptions | |
70 | |
71 // Stub Code definitions | |
72 | |
73 static address handle_unsafe_access() { | |
74 JavaThread* thread = JavaThread::current(); | |
75 address pc = thread->saved_exception_pc(); | |
76 // pc is the instruction which we must emulate | |
77 // doing a no-op is fine: return garbage from the load | |
78 // therefore, compute npc | |
79 address npc = Assembler::locate_next_instruction(pc); | |
80 | |
81 // request an async exception | |
82 thread->set_pending_unsafe_access_error(); | |
83 | |
84 // return address of next instruction to execute | |
85 return npc; | |
86 } | |
87 | |
88 class StubGenerator: public StubCodeGenerator { | |
89 private: | |
90 | |
91 #ifdef PRODUCT | |
92 #define inc_counter_np(counter) (0) | |
93 #else | |
94 void inc_counter_np_(int& counter) { | |
95 __ incrementl(ExternalAddress((address)&counter)); | |
96 } | |
97 #define inc_counter_np(counter) \ | |
98 BLOCK_COMMENT("inc_counter " #counter); \ | |
99 inc_counter_np_(counter); | |
100 #endif | |
101 | |
102 // Call stubs are used to call Java from C | |
103 // | |
104 // Linux Arguments: | |
105 // c_rarg0: call wrapper address address | |
106 // c_rarg1: result address | |
107 // c_rarg2: result type BasicType | |
108 // c_rarg3: method methodOop | |
109 // c_rarg4: (interpreter) entry point address | |
110 // c_rarg5: parameters intptr_t* | |
111 // 16(rbp): parameter size (in words) int | |
112 // 24(rbp): thread Thread* | |
113 // | |
114 // [ return_from_Java ] <--- rsp | |
115 // [ argument word n ] | |
116 // ... | |
117 // -12 [ argument word 1 ] | |
118 // -11 [ saved r15 ] <--- rsp_after_call | |
119 // -10 [ saved r14 ] | |
120 // -9 [ saved r13 ] | |
121 // -8 [ saved r12 ] | |
122 // -7 [ saved rbx ] | |
123 // -6 [ call wrapper ] | |
124 // -5 [ result ] | |
125 // -4 [ result type ] | |
126 // -3 [ method ] | |
127 // -2 [ entry point ] | |
128 // -1 [ parameters ] | |
129 // 0 [ saved rbp ] <--- rbp | |
130 // 1 [ return address ] | |
131 // 2 [ parameter size ] | |
132 // 3 [ thread ] | |
133 // | |
134 // Windows Arguments: | |
135 // c_rarg0: call wrapper address address | |
136 // c_rarg1: result address | |
137 // c_rarg2: result type BasicType | |
138 // c_rarg3: method methodOop | |
139 // 48(rbp): (interpreter) entry point address | |
140 // 56(rbp): parameters intptr_t* | |
141 // 64(rbp): parameter size (in words) int | |
142 // 72(rbp): thread Thread* | |
143 // | |
144 // [ return_from_Java ] <--- rsp | |
145 // [ argument word n ] | |
146 // ... | |
147 // -8 [ argument word 1 ] | |
148 // -7 [ saved r15 ] <--- rsp_after_call | |
149 // -6 [ saved r14 ] | |
150 // -5 [ saved r13 ] | |
151 // -4 [ saved r12 ] | |
152 // -3 [ saved rdi ] | |
153 // -2 [ saved rsi ] | |
154 // -1 [ saved rbx ] | |
155 // 0 [ saved rbp ] <--- rbp | |
156 // 1 [ return address ] | |
157 // 2 [ call wrapper ] | |
158 // 3 [ result ] | |
159 // 4 [ result type ] | |
160 // 5 [ method ] | |
161 // 6 [ entry point ] | |
162 // 7 [ parameters ] | |
163 // 8 [ parameter size ] | |
164 // 9 [ thread ] | |
165 // | |
166 // Windows reserves the callers stack space for arguments 1-4. | |
167 // We spill c_rarg0-c_rarg3 to this space. | |
168 | |
169 // Call stub stack layout word offsets from rbp | |
170 enum call_stub_layout { | |
171 #ifdef _WIN64 | |
172 rsp_after_call_off = -7, | |
173 r15_off = rsp_after_call_off, | |
174 r14_off = -6, | |
175 r13_off = -5, | |
176 r12_off = -4, | |
177 rdi_off = -3, | |
178 rsi_off = -2, | |
179 rbx_off = -1, | |
180 rbp_off = 0, | |
181 retaddr_off = 1, | |
182 call_wrapper_off = 2, | |
183 result_off = 3, | |
184 result_type_off = 4, | |
185 method_off = 5, | |
186 entry_point_off = 6, | |
187 parameters_off = 7, | |
188 parameter_size_off = 8, | |
189 thread_off = 9 | |
190 #else | |
191 rsp_after_call_off = -12, | |
192 mxcsr_off = rsp_after_call_off, | |
193 r15_off = -11, | |
194 r14_off = -10, | |
195 r13_off = -9, | |
196 r12_off = -8, | |
197 rbx_off = -7, | |
198 call_wrapper_off = -6, | |
199 result_off = -5, | |
200 result_type_off = -4, | |
201 method_off = -3, | |
202 entry_point_off = -2, | |
203 parameters_off = -1, | |
204 rbp_off = 0, | |
205 retaddr_off = 1, | |
206 parameter_size_off = 2, | |
207 thread_off = 3 | |
208 #endif | |
209 }; | |
210 | |
211 address generate_call_stub(address& return_address) { | |
212 assert((int)frame::entry_frame_after_call_words == -(int)rsp_after_call_off + 1 && | |
213 (int)frame::entry_frame_call_wrapper_offset == (int)call_wrapper_off, | |
214 "adjust this code"); | |
215 StubCodeMark mark(this, "StubRoutines", "call_stub"); | |
216 address start = __ pc(); | |
217 | |
218 // same as in generate_catch_exception()! | |
219 const Address rsp_after_call(rbp, rsp_after_call_off * wordSize); | |
220 | |
221 const Address call_wrapper (rbp, call_wrapper_off * wordSize); | |
222 const Address result (rbp, result_off * wordSize); | |
223 const Address result_type (rbp, result_type_off * wordSize); | |
224 const Address method (rbp, method_off * wordSize); | |
225 const Address entry_point (rbp, entry_point_off * wordSize); | |
226 const Address parameters (rbp, parameters_off * wordSize); | |
227 const Address parameter_size(rbp, parameter_size_off * wordSize); | |
228 | |
229 // same as in generate_catch_exception()! | |
230 const Address thread (rbp, thread_off * wordSize); | |
231 | |
232 const Address r15_save(rbp, r15_off * wordSize); | |
233 const Address r14_save(rbp, r14_off * wordSize); | |
234 const Address r13_save(rbp, r13_off * wordSize); | |
235 const Address r12_save(rbp, r12_off * wordSize); | |
236 const Address rbx_save(rbp, rbx_off * wordSize); | |
237 | |
238 // stub code | |
239 __ enter(); | |
304 | 240 __ subptr(rsp, -rsp_after_call_off * wordSize); |
0 | 241 |
242 // save register parameters | |
243 #ifndef _WIN64 | |
304 | 244 __ movptr(parameters, c_rarg5); // parameters |
245 __ movptr(entry_point, c_rarg4); // entry_point | |
0 | 246 #endif |
247 | |
304 | 248 __ movptr(method, c_rarg3); // method |
249 __ movl(result_type, c_rarg2); // result type | |
250 __ movptr(result, c_rarg1); // result | |
251 __ movptr(call_wrapper, c_rarg0); // call wrapper | |
0 | 252 |
253 // save regs belonging to calling function | |
304 | 254 __ movptr(rbx_save, rbx); |
255 __ movptr(r12_save, r12); | |
256 __ movptr(r13_save, r13); | |
257 __ movptr(r14_save, r14); | |
258 __ movptr(r15_save, r15); | |
0 | 259 |
260 #ifdef _WIN64 | |
261 const Address rdi_save(rbp, rdi_off * wordSize); | |
262 const Address rsi_save(rbp, rsi_off * wordSize); | |
263 | |
304 | 264 __ movptr(rsi_save, rsi); |
265 __ movptr(rdi_save, rdi); | |
0 | 266 #else |
267 const Address mxcsr_save(rbp, mxcsr_off * wordSize); | |
268 { | |
269 Label skip_ldmx; | |
270 __ stmxcsr(mxcsr_save); | |
271 __ movl(rax, mxcsr_save); | |
272 __ andl(rax, MXCSR_MASK); // Only check control and mask bits | |
304 | 273 ExternalAddress mxcsr_std(StubRoutines::x86::mxcsr_std()); |
0 | 274 __ cmp32(rax, mxcsr_std); |
275 __ jcc(Assembler::equal, skip_ldmx); | |
276 __ ldmxcsr(mxcsr_std); | |
277 __ bind(skip_ldmx); | |
278 } | |
279 #endif | |
280 | |
281 // Load up thread register | |
304 | 282 __ movptr(r15_thread, thread); |
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283 __ reinit_heapbase(); |
0 | 284 |
285 #ifdef ASSERT | |
286 // make sure we have no pending exceptions | |
287 { | |
288 Label L; | |
304 | 289 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 290 __ jcc(Assembler::equal, L); |
291 __ stop("StubRoutines::call_stub: entered with pending exception"); | |
292 __ bind(L); | |
293 } | |
294 #endif | |
295 | |
296 // pass parameters if any | |
297 BLOCK_COMMENT("pass parameters if any"); | |
298 Label parameters_done; | |
299 __ movl(c_rarg3, parameter_size); | |
300 __ testl(c_rarg3, c_rarg3); | |
301 __ jcc(Assembler::zero, parameters_done); | |
302 | |
303 Label loop; | |
304 | 304 __ movptr(c_rarg2, parameters); // parameter pointer |
305 __ movl(c_rarg1, c_rarg3); // parameter counter is in c_rarg1 | |
0 | 306 __ BIND(loop); |
304 | 307 __ movptr(rax, Address(c_rarg2, 0));// get parameter |
308 __ addptr(c_rarg2, wordSize); // advance to next parameter | |
309 __ decrementl(c_rarg1); // decrement counter | |
310 __ push(rax); // pass parameter | |
0 | 311 __ jcc(Assembler::notZero, loop); |
312 | |
313 // call Java function | |
314 __ BIND(parameters_done); | |
304 | 315 __ movptr(rbx, method); // get methodOop |
316 __ movptr(c_rarg1, entry_point); // get entry_point | |
317 __ mov(r13, rsp); // set sender sp | |
0 | 318 BLOCK_COMMENT("call Java function"); |
319 __ call(c_rarg1); | |
320 | |
321 BLOCK_COMMENT("call_stub_return_address:"); | |
322 return_address = __ pc(); | |
323 | |
324 // store result depending on type (everything that is not | |
325 // T_OBJECT, T_LONG, T_FLOAT or T_DOUBLE is treated as T_INT) | |
304 | 326 __ movptr(c_rarg0, result); |
0 | 327 Label is_long, is_float, is_double, exit; |
328 __ movl(c_rarg1, result_type); | |
329 __ cmpl(c_rarg1, T_OBJECT); | |
330 __ jcc(Assembler::equal, is_long); | |
331 __ cmpl(c_rarg1, T_LONG); | |
332 __ jcc(Assembler::equal, is_long); | |
333 __ cmpl(c_rarg1, T_FLOAT); | |
334 __ jcc(Assembler::equal, is_float); | |
335 __ cmpl(c_rarg1, T_DOUBLE); | |
336 __ jcc(Assembler::equal, is_double); | |
337 | |
338 // handle T_INT case | |
339 __ movl(Address(c_rarg0, 0), rax); | |
340 | |
341 __ BIND(exit); | |
342 | |
343 // pop parameters | |
304 | 344 __ lea(rsp, rsp_after_call); |
0 | 345 |
346 #ifdef ASSERT | |
347 // verify that threads correspond | |
348 { | |
349 Label L, S; | |
304 | 350 __ cmpptr(r15_thread, thread); |
0 | 351 __ jcc(Assembler::notEqual, S); |
352 __ get_thread(rbx); | |
304 | 353 __ cmpptr(r15_thread, rbx); |
0 | 354 __ jcc(Assembler::equal, L); |
355 __ bind(S); | |
356 __ jcc(Assembler::equal, L); | |
357 __ stop("StubRoutines::call_stub: threads must correspond"); | |
358 __ bind(L); | |
359 } | |
360 #endif | |
361 | |
362 // restore regs belonging to calling function | |
304 | 363 __ movptr(r15, r15_save); |
364 __ movptr(r14, r14_save); | |
365 __ movptr(r13, r13_save); | |
366 __ movptr(r12, r12_save); | |
367 __ movptr(rbx, rbx_save); | |
0 | 368 |
369 #ifdef _WIN64 | |
304 | 370 __ movptr(rdi, rdi_save); |
371 __ movptr(rsi, rsi_save); | |
0 | 372 #else |
373 __ ldmxcsr(mxcsr_save); | |
374 #endif | |
375 | |
376 // restore rsp | |
304 | 377 __ addptr(rsp, -rsp_after_call_off * wordSize); |
0 | 378 |
379 // return | |
304 | 380 __ pop(rbp); |
0 | 381 __ ret(0); |
382 | |
383 // handle return types different from T_INT | |
384 __ BIND(is_long); | |
385 __ movq(Address(c_rarg0, 0), rax); | |
386 __ jmp(exit); | |
387 | |
388 __ BIND(is_float); | |
389 __ movflt(Address(c_rarg0, 0), xmm0); | |
390 __ jmp(exit); | |
391 | |
392 __ BIND(is_double); | |
393 __ movdbl(Address(c_rarg0, 0), xmm0); | |
394 __ jmp(exit); | |
395 | |
396 return start; | |
397 } | |
398 | |
399 // Return point for a Java call if there's an exception thrown in | |
400 // Java code. The exception is caught and transformed into a | |
401 // pending exception stored in JavaThread that can be tested from | |
402 // within the VM. | |
403 // | |
404 // Note: Usually the parameters are removed by the callee. In case | |
405 // of an exception crossing an activation frame boundary, that is | |
406 // not the case if the callee is compiled code => need to setup the | |
407 // rsp. | |
408 // | |
409 // rax: exception oop | |
410 | |
411 address generate_catch_exception() { | |
412 StubCodeMark mark(this, "StubRoutines", "catch_exception"); | |
413 address start = __ pc(); | |
414 | |
415 // same as in generate_call_stub(): | |
416 const Address rsp_after_call(rbp, rsp_after_call_off * wordSize); | |
417 const Address thread (rbp, thread_off * wordSize); | |
418 | |
419 #ifdef ASSERT | |
420 // verify that threads correspond | |
421 { | |
422 Label L, S; | |
304 | 423 __ cmpptr(r15_thread, thread); |
0 | 424 __ jcc(Assembler::notEqual, S); |
425 __ get_thread(rbx); | |
304 | 426 __ cmpptr(r15_thread, rbx); |
0 | 427 __ jcc(Assembler::equal, L); |
428 __ bind(S); | |
429 __ stop("StubRoutines::catch_exception: threads must correspond"); | |
430 __ bind(L); | |
431 } | |
432 #endif | |
433 | |
434 // set pending exception | |
435 __ verify_oop(rax); | |
436 | |
304 | 437 __ movptr(Address(r15_thread, Thread::pending_exception_offset()), rax); |
0 | 438 __ lea(rscratch1, ExternalAddress((address)__FILE__)); |
304 | 439 __ movptr(Address(r15_thread, Thread::exception_file_offset()), rscratch1); |
0 | 440 __ movl(Address(r15_thread, Thread::exception_line_offset()), (int) __LINE__); |
441 | |
442 // complete return to VM | |
443 assert(StubRoutines::_call_stub_return_address != NULL, | |
444 "_call_stub_return_address must have been generated before"); | |
445 __ jump(RuntimeAddress(StubRoutines::_call_stub_return_address)); | |
446 | |
447 return start; | |
448 } | |
449 | |
450 // Continuation point for runtime calls returning with a pending | |
451 // exception. The pending exception check happened in the runtime | |
452 // or native call stub. The pending exception in Thread is | |
453 // converted into a Java-level exception. | |
454 // | |
455 // Contract with Java-level exception handlers: | |
456 // rax: exception | |
457 // rdx: throwing pc | |
458 // | |
459 // NOTE: At entry of this stub, exception-pc must be on stack !! | |
460 | |
461 address generate_forward_exception() { | |
462 StubCodeMark mark(this, "StubRoutines", "forward exception"); | |
463 address start = __ pc(); | |
464 | |
465 // Upon entry, the sp points to the return address returning into | |
466 // Java (interpreted or compiled) code; i.e., the return address | |
467 // becomes the throwing pc. | |
468 // | |
469 // Arguments pushed before the runtime call are still on the stack | |
470 // but the exception handler will reset the stack pointer -> | |
471 // ignore them. A potential result in registers can be ignored as | |
472 // well. | |
473 | |
474 #ifdef ASSERT | |
475 // make sure this code is only executed if there is a pending exception | |
476 { | |
477 Label L; | |
304 | 478 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t) NULL); |
0 | 479 __ jcc(Assembler::notEqual, L); |
480 __ stop("StubRoutines::forward exception: no pending exception (1)"); | |
481 __ bind(L); | |
482 } | |
483 #endif | |
484 | |
485 // compute exception handler into rbx | |
304 | 486 __ movptr(c_rarg0, Address(rsp, 0)); |
0 | 487 BLOCK_COMMENT("call exception_handler_for_return_address"); |
488 __ call_VM_leaf(CAST_FROM_FN_PTR(address, | |
489 SharedRuntime::exception_handler_for_return_address), | |
1295 | 490 r15_thread, c_rarg0); |
304 | 491 __ mov(rbx, rax); |
0 | 492 |
493 // setup rax & rdx, remove return address & clear pending exception | |
304 | 494 __ pop(rdx); |
495 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset())); | |
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496 __ movptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 497 |
498 #ifdef ASSERT | |
499 // make sure exception is set | |
500 { | |
501 Label L; | |
304 | 502 __ testptr(rax, rax); |
0 | 503 __ jcc(Assembler::notEqual, L); |
504 __ stop("StubRoutines::forward exception: no pending exception (2)"); | |
505 __ bind(L); | |
506 } | |
507 #endif | |
508 | |
509 // continue at exception handler (return address removed) | |
510 // rax: exception | |
511 // rbx: exception handler | |
512 // rdx: throwing pc | |
513 __ verify_oop(rax); | |
514 __ jmp(rbx); | |
515 | |
516 return start; | |
517 } | |
518 | |
519 // Support for jint atomic::xchg(jint exchange_value, volatile jint* dest) | |
520 // | |
521 // Arguments : | |
522 // c_rarg0: exchange_value | |
523 // c_rarg0: dest | |
524 // | |
525 // Result: | |
526 // *dest <- ex, return (orig *dest) | |
527 address generate_atomic_xchg() { | |
528 StubCodeMark mark(this, "StubRoutines", "atomic_xchg"); | |
529 address start = __ pc(); | |
530 | |
531 __ movl(rax, c_rarg0); // Copy to eax we need a return value anyhow | |
532 __ xchgl(rax, Address(c_rarg1, 0)); // automatic LOCK | |
533 __ ret(0); | |
534 | |
535 return start; | |
536 } | |
537 | |
538 // Support for intptr_t atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) | |
539 // | |
540 // Arguments : | |
541 // c_rarg0: exchange_value | |
542 // c_rarg1: dest | |
543 // | |
544 // Result: | |
545 // *dest <- ex, return (orig *dest) | |
546 address generate_atomic_xchg_ptr() { | |
547 StubCodeMark mark(this, "StubRoutines", "atomic_xchg_ptr"); | |
548 address start = __ pc(); | |
549 | |
304 | 550 __ movptr(rax, c_rarg0); // Copy to eax we need a return value anyhow |
551 __ xchgptr(rax, Address(c_rarg1, 0)); // automatic LOCK | |
0 | 552 __ ret(0); |
553 | |
554 return start; | |
555 } | |
556 | |
557 // Support for jint atomic::atomic_cmpxchg(jint exchange_value, volatile jint* dest, | |
558 // jint compare_value) | |
559 // | |
560 // Arguments : | |
561 // c_rarg0: exchange_value | |
562 // c_rarg1: dest | |
563 // c_rarg2: compare_value | |
564 // | |
565 // Result: | |
566 // if ( compare_value == *dest ) { | |
567 // *dest = exchange_value | |
568 // return compare_value; | |
569 // else | |
570 // return *dest; | |
571 address generate_atomic_cmpxchg() { | |
572 StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg"); | |
573 address start = __ pc(); | |
574 | |
575 __ movl(rax, c_rarg2); | |
576 if ( os::is_MP() ) __ lock(); | |
577 __ cmpxchgl(c_rarg0, Address(c_rarg1, 0)); | |
578 __ ret(0); | |
579 | |
580 return start; | |
581 } | |
582 | |
583 // Support for jint atomic::atomic_cmpxchg_long(jlong exchange_value, | |
584 // volatile jlong* dest, | |
585 // jlong compare_value) | |
586 // Arguments : | |
587 // c_rarg0: exchange_value | |
588 // c_rarg1: dest | |
589 // c_rarg2: compare_value | |
590 // | |
591 // Result: | |
592 // if ( compare_value == *dest ) { | |
593 // *dest = exchange_value | |
594 // return compare_value; | |
595 // else | |
596 // return *dest; | |
597 address generate_atomic_cmpxchg_long() { | |
598 StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg_long"); | |
599 address start = __ pc(); | |
600 | |
601 __ movq(rax, c_rarg2); | |
602 if ( os::is_MP() ) __ lock(); | |
603 __ cmpxchgq(c_rarg0, Address(c_rarg1, 0)); | |
604 __ ret(0); | |
605 | |
606 return start; | |
607 } | |
608 | |
609 // Support for jint atomic::add(jint add_value, volatile jint* dest) | |
610 // | |
611 // Arguments : | |
612 // c_rarg0: add_value | |
613 // c_rarg1: dest | |
614 // | |
615 // Result: | |
616 // *dest += add_value | |
617 // return *dest; | |
618 address generate_atomic_add() { | |
619 StubCodeMark mark(this, "StubRoutines", "atomic_add"); | |
620 address start = __ pc(); | |
621 | |
622 __ movl(rax, c_rarg0); | |
623 if ( os::is_MP() ) __ lock(); | |
624 __ xaddl(Address(c_rarg1, 0), c_rarg0); | |
625 __ addl(rax, c_rarg0); | |
626 __ ret(0); | |
627 | |
628 return start; | |
629 } | |
630 | |
631 // Support for intptr_t atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) | |
632 // | |
633 // Arguments : | |
634 // c_rarg0: add_value | |
635 // c_rarg1: dest | |
636 // | |
637 // Result: | |
638 // *dest += add_value | |
639 // return *dest; | |
640 address generate_atomic_add_ptr() { | |
641 StubCodeMark mark(this, "StubRoutines", "atomic_add_ptr"); | |
642 address start = __ pc(); | |
643 | |
304 | 644 __ movptr(rax, c_rarg0); // Copy to eax we need a return value anyhow |
0 | 645 if ( os::is_MP() ) __ lock(); |
304 | 646 __ xaddptr(Address(c_rarg1, 0), c_rarg0); |
647 __ addptr(rax, c_rarg0); | |
0 | 648 __ ret(0); |
649 | |
650 return start; | |
651 } | |
652 | |
653 // Support for intptr_t OrderAccess::fence() | |
654 // | |
655 // Arguments : | |
656 // | |
657 // Result: | |
658 address generate_orderaccess_fence() { | |
659 StubCodeMark mark(this, "StubRoutines", "orderaccess_fence"); | |
660 address start = __ pc(); | |
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661 __ membar(Assembler::StoreLoad); |
0 | 662 __ ret(0); |
663 | |
664 return start; | |
665 } | |
666 | |
667 // Support for intptr_t get_previous_fp() | |
668 // | |
669 // This routine is used to find the previous frame pointer for the | |
670 // caller (current_frame_guess). This is used as part of debugging | |
671 // ps() is seemingly lost trying to find frames. | |
672 // This code assumes that caller current_frame_guess) has a frame. | |
673 address generate_get_previous_fp() { | |
674 StubCodeMark mark(this, "StubRoutines", "get_previous_fp"); | |
675 const Address old_fp(rbp, 0); | |
676 const Address older_fp(rax, 0); | |
677 address start = __ pc(); | |
678 | |
679 __ enter(); | |
304 | 680 __ movptr(rax, old_fp); // callers fp |
681 __ movptr(rax, older_fp); // the frame for ps() | |
682 __ pop(rbp); | |
0 | 683 __ ret(0); |
684 | |
685 return start; | |
686 } | |
687 | |
688 //---------------------------------------------------------------------------------------------------- | |
689 // Support for void verify_mxcsr() | |
690 // | |
691 // This routine is used with -Xcheck:jni to verify that native | |
692 // JNI code does not return to Java code without restoring the | |
693 // MXCSR register to our expected state. | |
694 | |
695 address generate_verify_mxcsr() { | |
696 StubCodeMark mark(this, "StubRoutines", "verify_mxcsr"); | |
697 address start = __ pc(); | |
698 | |
699 const Address mxcsr_save(rsp, 0); | |
700 | |
701 if (CheckJNICalls) { | |
702 Label ok_ret; | |
304 | 703 __ push(rax); |
704 __ subptr(rsp, wordSize); // allocate a temp location | |
0 | 705 __ stmxcsr(mxcsr_save); |
706 __ movl(rax, mxcsr_save); | |
707 __ andl(rax, MXCSR_MASK); // Only check control and mask bits | |
304 | 708 __ cmpl(rax, *(int *)(StubRoutines::x86::mxcsr_std())); |
0 | 709 __ jcc(Assembler::equal, ok_ret); |
710 | |
711 __ warn("MXCSR changed by native JNI code, use -XX:+RestoreMXCSROnJNICall"); | |
712 | |
304 | 713 __ ldmxcsr(ExternalAddress(StubRoutines::x86::mxcsr_std())); |
0 | 714 |
715 __ bind(ok_ret); | |
304 | 716 __ addptr(rsp, wordSize); |
717 __ pop(rax); | |
0 | 718 } |
719 | |
720 __ ret(0); | |
721 | |
722 return start; | |
723 } | |
724 | |
725 address generate_f2i_fixup() { | |
726 StubCodeMark mark(this, "StubRoutines", "f2i_fixup"); | |
727 Address inout(rsp, 5 * wordSize); // return address + 4 saves | |
728 | |
729 address start = __ pc(); | |
730 | |
731 Label L; | |
732 | |
304 | 733 __ push(rax); |
734 __ push(c_rarg3); | |
735 __ push(c_rarg2); | |
736 __ push(c_rarg1); | |
0 | 737 |
738 __ movl(rax, 0x7f800000); | |
739 __ xorl(c_rarg3, c_rarg3); | |
740 __ movl(c_rarg2, inout); | |
741 __ movl(c_rarg1, c_rarg2); | |
742 __ andl(c_rarg1, 0x7fffffff); | |
743 __ cmpl(rax, c_rarg1); // NaN? -> 0 | |
744 __ jcc(Assembler::negative, L); | |
745 __ testl(c_rarg2, c_rarg2); // signed ? min_jint : max_jint | |
746 __ movl(c_rarg3, 0x80000000); | |
747 __ movl(rax, 0x7fffffff); | |
748 __ cmovl(Assembler::positive, c_rarg3, rax); | |
749 | |
750 __ bind(L); | |
304 | 751 __ movptr(inout, c_rarg3); |
752 | |
753 __ pop(c_rarg1); | |
754 __ pop(c_rarg2); | |
755 __ pop(c_rarg3); | |
756 __ pop(rax); | |
0 | 757 |
758 __ ret(0); | |
759 | |
760 return start; | |
761 } | |
762 | |
763 address generate_f2l_fixup() { | |
764 StubCodeMark mark(this, "StubRoutines", "f2l_fixup"); | |
765 Address inout(rsp, 5 * wordSize); // return address + 4 saves | |
766 address start = __ pc(); | |
767 | |
768 Label L; | |
769 | |
304 | 770 __ push(rax); |
771 __ push(c_rarg3); | |
772 __ push(c_rarg2); | |
773 __ push(c_rarg1); | |
0 | 774 |
775 __ movl(rax, 0x7f800000); | |
776 __ xorl(c_rarg3, c_rarg3); | |
777 __ movl(c_rarg2, inout); | |
778 __ movl(c_rarg1, c_rarg2); | |
779 __ andl(c_rarg1, 0x7fffffff); | |
780 __ cmpl(rax, c_rarg1); // NaN? -> 0 | |
781 __ jcc(Assembler::negative, L); | |
782 __ testl(c_rarg2, c_rarg2); // signed ? min_jlong : max_jlong | |
783 __ mov64(c_rarg3, 0x8000000000000000); | |
784 __ mov64(rax, 0x7fffffffffffffff); | |
304 | 785 __ cmov(Assembler::positive, c_rarg3, rax); |
0 | 786 |
787 __ bind(L); | |
304 | 788 __ movptr(inout, c_rarg3); |
789 | |
790 __ pop(c_rarg1); | |
791 __ pop(c_rarg2); | |
792 __ pop(c_rarg3); | |
793 __ pop(rax); | |
0 | 794 |
795 __ ret(0); | |
796 | |
797 return start; | |
798 } | |
799 | |
800 address generate_d2i_fixup() { | |
801 StubCodeMark mark(this, "StubRoutines", "d2i_fixup"); | |
802 Address inout(rsp, 6 * wordSize); // return address + 5 saves | |
803 | |
804 address start = __ pc(); | |
805 | |
806 Label L; | |
807 | |
304 | 808 __ push(rax); |
809 __ push(c_rarg3); | |
810 __ push(c_rarg2); | |
811 __ push(c_rarg1); | |
812 __ push(c_rarg0); | |
0 | 813 |
814 __ movl(rax, 0x7ff00000); | |
815 __ movq(c_rarg2, inout); | |
816 __ movl(c_rarg3, c_rarg2); | |
304 | 817 __ mov(c_rarg1, c_rarg2); |
818 __ mov(c_rarg0, c_rarg2); | |
0 | 819 __ negl(c_rarg3); |
304 | 820 __ shrptr(c_rarg1, 0x20); |
0 | 821 __ orl(c_rarg3, c_rarg2); |
822 __ andl(c_rarg1, 0x7fffffff); | |
823 __ xorl(c_rarg2, c_rarg2); | |
824 __ shrl(c_rarg3, 0x1f); | |
825 __ orl(c_rarg1, c_rarg3); | |
826 __ cmpl(rax, c_rarg1); | |
827 __ jcc(Assembler::negative, L); // NaN -> 0 | |
304 | 828 __ testptr(c_rarg0, c_rarg0); // signed ? min_jint : max_jint |
0 | 829 __ movl(c_rarg2, 0x80000000); |
830 __ movl(rax, 0x7fffffff); | |
304 | 831 __ cmov(Assembler::positive, c_rarg2, rax); |
0 | 832 |
833 __ bind(L); | |
304 | 834 __ movptr(inout, c_rarg2); |
835 | |
836 __ pop(c_rarg0); | |
837 __ pop(c_rarg1); | |
838 __ pop(c_rarg2); | |
839 __ pop(c_rarg3); | |
840 __ pop(rax); | |
0 | 841 |
842 __ ret(0); | |
843 | |
844 return start; | |
845 } | |
846 | |
847 address generate_d2l_fixup() { | |
848 StubCodeMark mark(this, "StubRoutines", "d2l_fixup"); | |
849 Address inout(rsp, 6 * wordSize); // return address + 5 saves | |
850 | |
851 address start = __ pc(); | |
852 | |
853 Label L; | |
854 | |
304 | 855 __ push(rax); |
856 __ push(c_rarg3); | |
857 __ push(c_rarg2); | |
858 __ push(c_rarg1); | |
859 __ push(c_rarg0); | |
0 | 860 |
861 __ movl(rax, 0x7ff00000); | |
862 __ movq(c_rarg2, inout); | |
863 __ movl(c_rarg3, c_rarg2); | |
304 | 864 __ mov(c_rarg1, c_rarg2); |
865 __ mov(c_rarg0, c_rarg2); | |
0 | 866 __ negl(c_rarg3); |
304 | 867 __ shrptr(c_rarg1, 0x20); |
0 | 868 __ orl(c_rarg3, c_rarg2); |
869 __ andl(c_rarg1, 0x7fffffff); | |
870 __ xorl(c_rarg2, c_rarg2); | |
871 __ shrl(c_rarg3, 0x1f); | |
872 __ orl(c_rarg1, c_rarg3); | |
873 __ cmpl(rax, c_rarg1); | |
874 __ jcc(Assembler::negative, L); // NaN -> 0 | |
875 __ testq(c_rarg0, c_rarg0); // signed ? min_jlong : max_jlong | |
876 __ mov64(c_rarg2, 0x8000000000000000); | |
877 __ mov64(rax, 0x7fffffffffffffff); | |
878 __ cmovq(Assembler::positive, c_rarg2, rax); | |
879 | |
880 __ bind(L); | |
881 __ movq(inout, c_rarg2); | |
882 | |
304 | 883 __ pop(c_rarg0); |
884 __ pop(c_rarg1); | |
885 __ pop(c_rarg2); | |
886 __ pop(c_rarg3); | |
887 __ pop(rax); | |
0 | 888 |
889 __ ret(0); | |
890 | |
891 return start; | |
892 } | |
893 | |
894 address generate_fp_mask(const char *stub_name, int64_t mask) { | |
1365 | 895 __ align(CodeEntryAlignment); |
0 | 896 StubCodeMark mark(this, "StubRoutines", stub_name); |
897 address start = __ pc(); | |
898 | |
899 __ emit_data64( mask, relocInfo::none ); | |
900 __ emit_data64( mask, relocInfo::none ); | |
901 | |
902 return start; | |
903 } | |
904 | |
905 // The following routine generates a subroutine to throw an | |
906 // asynchronous UnknownError when an unsafe access gets a fault that | |
907 // could not be reasonably prevented by the programmer. (Example: | |
908 // SIGBUS/OBJERR.) | |
909 address generate_handler_for_unsafe_access() { | |
910 StubCodeMark mark(this, "StubRoutines", "handler_for_unsafe_access"); | |
911 address start = __ pc(); | |
912 | |
304 | 913 __ push(0); // hole for return address-to-be |
914 __ pusha(); // push registers | |
0 | 915 Address next_pc(rsp, RegisterImpl::number_of_registers * BytesPerWord); |
916 | |
304 | 917 __ subptr(rsp, frame::arg_reg_save_area_bytes); |
0 | 918 BLOCK_COMMENT("call handle_unsafe_access"); |
919 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, handle_unsafe_access))); | |
304 | 920 __ addptr(rsp, frame::arg_reg_save_area_bytes); |
921 | |
922 __ movptr(next_pc, rax); // stuff next address | |
923 __ popa(); | |
0 | 924 __ ret(0); // jump to next address |
925 | |
926 return start; | |
927 } | |
928 | |
929 // Non-destructive plausibility checks for oops | |
930 // | |
931 // Arguments: | |
932 // all args on stack! | |
933 // | |
934 // Stack after saving c_rarg3: | |
935 // [tos + 0]: saved c_rarg3 | |
936 // [tos + 1]: saved c_rarg2 | |
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937 // [tos + 2]: saved r12 (several TemplateTable methods use it) |
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938 // [tos + 3]: saved flags |
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939 // [tos + 4]: return address |
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940 // * [tos + 5]: error message (char*) |
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941 // * [tos + 6]: object to verify (oop) |
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942 // * [tos + 7]: saved rax - saved by caller and bashed |
1583 | 943 // * [tos + 8]: saved r10 (rscratch1) - saved by caller |
0 | 944 // * = popped on exit |
945 address generate_verify_oop() { | |
946 StubCodeMark mark(this, "StubRoutines", "verify_oop"); | |
947 address start = __ pc(); | |
948 | |
949 Label exit, error; | |
950 | |
304 | 951 __ pushf(); |
0 | 952 __ incrementl(ExternalAddress((address) StubRoutines::verify_oop_count_addr())); |
953 | |
304 | 954 __ push(r12); |
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955 |
0 | 956 // save c_rarg2 and c_rarg3 |
304 | 957 __ push(c_rarg2); |
958 __ push(c_rarg3); | |
0 | 959 |
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960 enum { |
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961 // After previous pushes. |
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962 oop_to_verify = 6 * wordSize, |
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963 saved_rax = 7 * wordSize, |
1583 | 964 saved_r10 = 8 * wordSize, |
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965 |
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966 // Before the call to MacroAssembler::debug(), see below. |
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967 return_addr = 16 * wordSize, |
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968 error_msg = 17 * wordSize |
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969 }; |
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970 |
0 | 971 // get object |
304 | 972 __ movptr(rax, Address(rsp, oop_to_verify)); |
0 | 973 |
974 // make sure object is 'reasonable' | |
304 | 975 __ testptr(rax, rax); |
0 | 976 __ jcc(Assembler::zero, exit); // if obj is NULL it is OK |
977 // Check if the oop is in the right area of memory | |
304 | 978 __ movptr(c_rarg2, rax); |
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979 __ movptr(c_rarg3, (intptr_t) Universe::verify_oop_mask()); |
304 | 980 __ andptr(c_rarg2, c_rarg3); |
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981 __ movptr(c_rarg3, (intptr_t) Universe::verify_oop_bits()); |
304 | 982 __ cmpptr(c_rarg2, c_rarg3); |
0 | 983 __ jcc(Assembler::notZero, error); |
984 | |
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985 // set r12 to heapbase for load_klass() |
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986 __ reinit_heapbase(); |
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987 |
0 | 988 // make sure klass is 'reasonable' |
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989 __ load_klass(rax, rax); // get klass |
304 | 990 __ testptr(rax, rax); |
0 | 991 __ jcc(Assembler::zero, error); // if klass is NULL it is broken |
992 // Check if the klass is in the right area of memory | |
304 | 993 __ mov(c_rarg2, rax); |
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994 __ movptr(c_rarg3, (intptr_t) Universe::verify_klass_mask()); |
304 | 995 __ andptr(c_rarg2, c_rarg3); |
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996 __ movptr(c_rarg3, (intptr_t) Universe::verify_klass_bits()); |
304 | 997 __ cmpptr(c_rarg2, c_rarg3); |
0 | 998 __ jcc(Assembler::notZero, error); |
999 | |
1000 // make sure klass' klass is 'reasonable' | |
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1001 __ load_klass(rax, rax); |
304 | 1002 __ testptr(rax, rax); |
0 | 1003 __ jcc(Assembler::zero, error); // if klass' klass is NULL it is broken |
1004 // Check if the klass' klass is in the right area of memory | |
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1005 __ movptr(c_rarg3, (intptr_t) Universe::verify_klass_mask()); |
304 | 1006 __ andptr(rax, c_rarg3); |
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1007 __ movptr(c_rarg3, (intptr_t) Universe::verify_klass_bits()); |
304 | 1008 __ cmpptr(rax, c_rarg3); |
0 | 1009 __ jcc(Assembler::notZero, error); |
1010 | |
1011 // return if everything seems ok | |
1012 __ bind(exit); | |
304 | 1013 __ movptr(rax, Address(rsp, saved_rax)); // get saved rax back |
1583 | 1014 __ movptr(rscratch1, Address(rsp, saved_r10)); // get saved r10 back |
304 | 1015 __ pop(c_rarg3); // restore c_rarg3 |
1016 __ pop(c_rarg2); // restore c_rarg2 | |
1017 __ pop(r12); // restore r12 | |
1018 __ popf(); // restore flags | |
1583 | 1019 __ ret(4 * wordSize); // pop caller saved stuff |
0 | 1020 |
1021 // handle errors | |
1022 __ bind(error); | |
304 | 1023 __ movptr(rax, Address(rsp, saved_rax)); // get saved rax back |
1583 | 1024 __ movptr(rscratch1, Address(rsp, saved_r10)); // get saved r10 back |
304 | 1025 __ pop(c_rarg3); // get saved c_rarg3 back |
1026 __ pop(c_rarg2); // get saved c_rarg2 back | |
1027 __ pop(r12); // get saved r12 back | |
1028 __ popf(); // get saved flags off stack -- | |
0 | 1029 // will be ignored |
1030 | |
304 | 1031 __ pusha(); // push registers |
0 | 1032 // (rip is already |
1033 // already pushed) | |
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1034 // debug(char* msg, int64_t pc, int64_t regs[]) |
0 | 1035 // We've popped the registers we'd saved (c_rarg3, c_rarg2 and flags), and |
1036 // pushed all the registers, so now the stack looks like: | |
1037 // [tos + 0] 16 saved registers | |
1038 // [tos + 16] return address | |
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1039 // * [tos + 17] error message (char*) |
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1040 // * [tos + 18] object to verify (oop) |
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1041 // * [tos + 19] saved rax - saved by caller and bashed |
1583 | 1042 // * [tos + 20] saved r10 (rscratch1) - saved by caller |
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1043 // * = popped on exit |
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1044 |
304 | 1045 __ movptr(c_rarg0, Address(rsp, error_msg)); // pass address of error message |
1046 __ movptr(c_rarg1, Address(rsp, return_addr)); // pass return address | |
1047 __ movq(c_rarg2, rsp); // pass address of regs on stack | |
1048 __ mov(r12, rsp); // remember rsp | |
1049 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
1050 __ andptr(rsp, -16); // align stack as required by ABI | |
0 | 1051 BLOCK_COMMENT("call MacroAssembler::debug"); |
304 | 1052 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64))); |
1053 __ mov(rsp, r12); // restore rsp | |
1054 __ popa(); // pop registers (includes r12) | |
1583 | 1055 __ ret(4 * wordSize); // pop caller saved stuff |
0 | 1056 |
1057 return start; | |
1058 } | |
1059 | |
1060 static address disjoint_byte_copy_entry; | |
1061 static address disjoint_short_copy_entry; | |
1062 static address disjoint_int_copy_entry; | |
1063 static address disjoint_long_copy_entry; | |
1064 static address disjoint_oop_copy_entry; | |
1065 | |
1066 static address byte_copy_entry; | |
1067 static address short_copy_entry; | |
1068 static address int_copy_entry; | |
1069 static address long_copy_entry; | |
1070 static address oop_copy_entry; | |
1071 | |
1072 static address checkcast_copy_entry; | |
1073 | |
1074 // | |
1075 // Verify that a register contains clean 32-bits positive value | |
1076 // (high 32-bits are 0) so it could be used in 64-bits shifts. | |
1077 // | |
1078 // Input: | |
1079 // Rint - 32-bits value | |
1080 // Rtmp - scratch | |
1081 // | |
1082 void assert_clean_int(Register Rint, Register Rtmp) { | |
1083 #ifdef ASSERT | |
1084 Label L; | |
1085 assert_different_registers(Rtmp, Rint); | |
1086 __ movslq(Rtmp, Rint); | |
1087 __ cmpq(Rtmp, Rint); | |
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1088 __ jcc(Assembler::equal, L); |
0 | 1089 __ stop("high 32-bits of int value are not 0"); |
1090 __ bind(L); | |
1091 #endif | |
1092 } | |
1093 | |
1094 // Generate overlap test for array copy stubs | |
1095 // | |
1096 // Input: | |
1097 // c_rarg0 - from | |
1098 // c_rarg1 - to | |
1099 // c_rarg2 - element count | |
1100 // | |
1101 // Output: | |
1102 // rax - &from[element count - 1] | |
1103 // | |
1104 void array_overlap_test(address no_overlap_target, Address::ScaleFactor sf) { | |
1105 assert(no_overlap_target != NULL, "must be generated"); | |
1106 array_overlap_test(no_overlap_target, NULL, sf); | |
1107 } | |
1108 void array_overlap_test(Label& L_no_overlap, Address::ScaleFactor sf) { | |
1109 array_overlap_test(NULL, &L_no_overlap, sf); | |
1110 } | |
1111 void array_overlap_test(address no_overlap_target, Label* NOLp, Address::ScaleFactor sf) { | |
1112 const Register from = c_rarg0; | |
1113 const Register to = c_rarg1; | |
1114 const Register count = c_rarg2; | |
1115 const Register end_from = rax; | |
1116 | |
304 | 1117 __ cmpptr(to, from); |
1118 __ lea(end_from, Address(from, count, sf, 0)); | |
0 | 1119 if (NOLp == NULL) { |
1120 ExternalAddress no_overlap(no_overlap_target); | |
1121 __ jump_cc(Assembler::belowEqual, no_overlap); | |
304 | 1122 __ cmpptr(to, end_from); |
0 | 1123 __ jump_cc(Assembler::aboveEqual, no_overlap); |
1124 } else { | |
1125 __ jcc(Assembler::belowEqual, (*NOLp)); | |
304 | 1126 __ cmpptr(to, end_from); |
0 | 1127 __ jcc(Assembler::aboveEqual, (*NOLp)); |
1128 } | |
1129 } | |
1130 | |
1131 // Shuffle first three arg regs on Windows into Linux/Solaris locations. | |
1132 // | |
1133 // Outputs: | |
1134 // rdi - rcx | |
1135 // rsi - rdx | |
1136 // rdx - r8 | |
1137 // rcx - r9 | |
1138 // | |
1139 // Registers r9 and r10 are used to save rdi and rsi on Windows, which latter | |
1140 // are non-volatile. r9 and r10 should not be used by the caller. | |
1141 // | |
1142 void setup_arg_regs(int nargs = 3) { | |
1143 const Register saved_rdi = r9; | |
1144 const Register saved_rsi = r10; | |
1145 assert(nargs == 3 || nargs == 4, "else fix"); | |
1146 #ifdef _WIN64 | |
1147 assert(c_rarg0 == rcx && c_rarg1 == rdx && c_rarg2 == r8 && c_rarg3 == r9, | |
1148 "unexpected argument registers"); | |
1149 if (nargs >= 4) | |
304 | 1150 __ mov(rax, r9); // r9 is also saved_rdi |
1151 __ movptr(saved_rdi, rdi); | |
1152 __ movptr(saved_rsi, rsi); | |
1153 __ mov(rdi, rcx); // c_rarg0 | |
1154 __ mov(rsi, rdx); // c_rarg1 | |
1155 __ mov(rdx, r8); // c_rarg2 | |
0 | 1156 if (nargs >= 4) |
304 | 1157 __ mov(rcx, rax); // c_rarg3 (via rax) |
0 | 1158 #else |
1159 assert(c_rarg0 == rdi && c_rarg1 == rsi && c_rarg2 == rdx && c_rarg3 == rcx, | |
1160 "unexpected argument registers"); | |
1161 #endif | |
1162 } | |
1163 | |
1164 void restore_arg_regs() { | |
1165 const Register saved_rdi = r9; | |
1166 const Register saved_rsi = r10; | |
1167 #ifdef _WIN64 | |
304 | 1168 __ movptr(rdi, saved_rdi); |
1169 __ movptr(rsi, saved_rsi); | |
0 | 1170 #endif |
1171 } | |
1172 | |
1173 // Generate code for an array write pre barrier | |
1174 // | |
1175 // addr - starting address | |
1176 // count - element count | |
1177 // | |
1178 // Destroy no registers! | |
1179 // | |
1180 void gen_write_ref_array_pre_barrier(Register addr, Register count) { | |
1181 BarrierSet* bs = Universe::heap()->barrier_set(); | |
1182 switch (bs->kind()) { | |
1183 case BarrierSet::G1SATBCT: | |
1184 case BarrierSet::G1SATBCTLogging: | |
1185 { | |
304 | 1186 __ pusha(); // push registers |
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1187 if (count == c_rarg0) { |
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1188 if (addr == c_rarg1) { |
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1189 // exactly backwards!! |
362 | 1190 __ xchgptr(c_rarg1, c_rarg0); |
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1191 } else { |
362 | 1192 __ movptr(c_rarg1, count); |
1193 __ movptr(c_rarg0, addr); | |
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1194 } |
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1195 |
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1196 } else { |
362 | 1197 __ movptr(c_rarg0, addr); |
1198 __ movptr(c_rarg1, count); | |
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1199 } |
1192
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1200 __ call_VM_leaf(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_pre), 2); |
304 | 1201 __ popa(); |
0 | 1202 } |
1203 break; | |
1204 case BarrierSet::CardTableModRef: | |
1205 case BarrierSet::CardTableExtension: | |
1206 case BarrierSet::ModRef: | |
1207 break; | |
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1208 default: |
0 | 1209 ShouldNotReachHere(); |
1210 | |
1211 } | |
1212 } | |
1213 | |
1214 // | |
1215 // Generate code for an array write post barrier | |
1216 // | |
1217 // Input: | |
1218 // start - register containing starting address of destination array | |
1219 // end - register containing ending address of destination array | |
1220 // scratch - scratch register | |
1221 // | |
1222 // The input registers are overwritten. | |
1223 // The ending address is inclusive. | |
1224 void gen_write_ref_array_post_barrier(Register start, Register end, Register scratch) { | |
1225 assert_different_registers(start, end, scratch); | |
1226 BarrierSet* bs = Universe::heap()->barrier_set(); | |
1227 switch (bs->kind()) { | |
1228 case BarrierSet::G1SATBCT: | |
1229 case BarrierSet::G1SATBCTLogging: | |
1230 | |
1231 { | |
304 | 1232 __ pusha(); // push registers (overkill) |
0 | 1233 // must compute element count unless barrier set interface is changed (other platforms supply count) |
1234 assert_different_registers(start, end, scratch); | |
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1235 __ lea(scratch, Address(end, BytesPerHeapOop)); |
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1236 __ subptr(scratch, start); // subtract start to get #bytes |
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1237 __ shrptr(scratch, LogBytesPerHeapOop); // convert to element count |
304 | 1238 __ mov(c_rarg0, start); |
1239 __ mov(c_rarg1, scratch); | |
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1240 __ call_VM_leaf(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_post), 2); |
304 | 1241 __ popa(); |
0 | 1242 } |
1243 break; | |
1244 case BarrierSet::CardTableModRef: | |
1245 case BarrierSet::CardTableExtension: | |
1246 { | |
1247 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | |
1248 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); | |
1249 | |
1250 Label L_loop; | |
1251 | |
304 | 1252 __ shrptr(start, CardTableModRefBS::card_shift); |
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1253 __ addptr(end, BytesPerHeapOop); |
304 | 1254 __ shrptr(end, CardTableModRefBS::card_shift); |
1255 __ subptr(end, start); // number of bytes to copy | |
0 | 1256 |
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1257 intptr_t disp = (intptr_t) ct->byte_map_base; |
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1258 if (__ is_simm32(disp)) { |
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1259 Address cardtable(noreg, noreg, Address::no_scale, disp); |
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1260 __ lea(scratch, cardtable); |
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1261 } else { |
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1262 ExternalAddress cardtable((address)disp); |
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1263 __ lea(scratch, cardtable); |
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1264 } |
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1265 |
0 | 1266 const Register count = end; // 'end' register contains bytes count now |
304 | 1267 __ addptr(start, scratch); |
0 | 1268 __ BIND(L_loop); |
1269 __ movb(Address(start, count, Address::times_1), 0); | |
304 | 1270 __ decrement(count); |
0 | 1271 __ jcc(Assembler::greaterEqual, L_loop); |
1272 } | |
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1273 break; |
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1274 default: |
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1275 ShouldNotReachHere(); |
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1276 |
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1277 } |
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1278 } |
0 | 1279 |
405 | 1280 |
0 | 1281 // Copy big chunks forward |
1282 // | |
1283 // Inputs: | |
1284 // end_from - source arrays end address | |
1285 // end_to - destination array end address | |
1286 // qword_count - 64-bits element count, negative | |
1287 // to - scratch | |
1288 // L_copy_32_bytes - entry label | |
1289 // L_copy_8_bytes - exit label | |
1290 // | |
1291 void copy_32_bytes_forward(Register end_from, Register end_to, | |
1292 Register qword_count, Register to, | |
1293 Label& L_copy_32_bytes, Label& L_copy_8_bytes) { | |
1294 DEBUG_ONLY(__ stop("enter at entry label, not here")); | |
1295 Label L_loop; | |
1365 | 1296 __ align(OptoLoopAlignment); |
0 | 1297 __ BIND(L_loop); |
405 | 1298 if(UseUnalignedLoadStores) { |
1299 __ movdqu(xmm0, Address(end_from, qword_count, Address::times_8, -24)); | |
1300 __ movdqu(Address(end_to, qword_count, Address::times_8, -24), xmm0); | |
1301 __ movdqu(xmm1, Address(end_from, qword_count, Address::times_8, - 8)); | |
1302 __ movdqu(Address(end_to, qword_count, Address::times_8, - 8), xmm1); | |
1303 | |
1304 } else { | |
1305 __ movq(to, Address(end_from, qword_count, Address::times_8, -24)); | |
1306 __ movq(Address(end_to, qword_count, Address::times_8, -24), to); | |
1307 __ movq(to, Address(end_from, qword_count, Address::times_8, -16)); | |
1308 __ movq(Address(end_to, qword_count, Address::times_8, -16), to); | |
1309 __ movq(to, Address(end_from, qword_count, Address::times_8, - 8)); | |
1310 __ movq(Address(end_to, qword_count, Address::times_8, - 8), to); | |
1311 __ movq(to, Address(end_from, qword_count, Address::times_8, - 0)); | |
1312 __ movq(Address(end_to, qword_count, Address::times_8, - 0), to); | |
1313 } | |
0 | 1314 __ BIND(L_copy_32_bytes); |
304 | 1315 __ addptr(qword_count, 4); |
0 | 1316 __ jcc(Assembler::lessEqual, L_loop); |
304 | 1317 __ subptr(qword_count, 4); |
0 | 1318 __ jcc(Assembler::less, L_copy_8_bytes); // Copy trailing qwords |
1319 } | |
1320 | |
1321 | |
1322 // Copy big chunks backward | |
1323 // | |
1324 // Inputs: | |
1325 // from - source arrays address | |
1326 // dest - destination array address | |
1327 // qword_count - 64-bits element count | |
1328 // to - scratch | |
1329 // L_copy_32_bytes - entry label | |
1330 // L_copy_8_bytes - exit label | |
1331 // | |
1332 void copy_32_bytes_backward(Register from, Register dest, | |
1333 Register qword_count, Register to, | |
1334 Label& L_copy_32_bytes, Label& L_copy_8_bytes) { | |
1335 DEBUG_ONLY(__ stop("enter at entry label, not here")); | |
1336 Label L_loop; | |
1365 | 1337 __ align(OptoLoopAlignment); |
0 | 1338 __ BIND(L_loop); |
405 | 1339 if(UseUnalignedLoadStores) { |
1340 __ movdqu(xmm0, Address(from, qword_count, Address::times_8, 16)); | |
1341 __ movdqu(Address(dest, qword_count, Address::times_8, 16), xmm0); | |
1342 __ movdqu(xmm1, Address(from, qword_count, Address::times_8, 0)); | |
1343 __ movdqu(Address(dest, qword_count, Address::times_8, 0), xmm1); | |
1344 | |
1345 } else { | |
1346 __ movq(to, Address(from, qword_count, Address::times_8, 24)); | |
1347 __ movq(Address(dest, qword_count, Address::times_8, 24), to); | |
1348 __ movq(to, Address(from, qword_count, Address::times_8, 16)); | |
1349 __ movq(Address(dest, qword_count, Address::times_8, 16), to); | |
1350 __ movq(to, Address(from, qword_count, Address::times_8, 8)); | |
1351 __ movq(Address(dest, qword_count, Address::times_8, 8), to); | |
1352 __ movq(to, Address(from, qword_count, Address::times_8, 0)); | |
1353 __ movq(Address(dest, qword_count, Address::times_8, 0), to); | |
1354 } | |
0 | 1355 __ BIND(L_copy_32_bytes); |
304 | 1356 __ subptr(qword_count, 4); |
0 | 1357 __ jcc(Assembler::greaterEqual, L_loop); |
304 | 1358 __ addptr(qword_count, 4); |
0 | 1359 __ jcc(Assembler::greater, L_copy_8_bytes); // Copy trailing qwords |
1360 } | |
1361 | |
1362 | |
1363 // Arguments: | |
1364 // aligned - true => Input and output aligned on a HeapWord == 8-byte boundary | |
1365 // ignored | |
1366 // name - stub name string | |
1367 // | |
1368 // Inputs: | |
1369 // c_rarg0 - source array address | |
1370 // c_rarg1 - destination array address | |
1371 // c_rarg2 - element count, treated as ssize_t, can be zero | |
1372 // | |
1373 // If 'from' and/or 'to' are aligned on 4-, 2-, or 1-byte boundaries, | |
1374 // we let the hardware handle it. The one to eight bytes within words, | |
1375 // dwords or qwords that span cache line boundaries will still be loaded | |
1376 // and stored atomically. | |
1377 // | |
1378 // Side Effects: | |
1379 // disjoint_byte_copy_entry is set to the no-overlap entry point | |
1380 // used by generate_conjoint_byte_copy(). | |
1381 // | |
1382 address generate_disjoint_byte_copy(bool aligned, const char *name) { | |
1383 __ align(CodeEntryAlignment); | |
1384 StubCodeMark mark(this, "StubRoutines", name); | |
1385 address start = __ pc(); | |
1386 | |
1387 Label L_copy_32_bytes, L_copy_8_bytes, L_copy_4_bytes, L_copy_2_bytes; | |
1388 Label L_copy_byte, L_exit; | |
1389 const Register from = rdi; // source array address | |
1390 const Register to = rsi; // destination array address | |
1391 const Register count = rdx; // elements count | |
1392 const Register byte_count = rcx; | |
1393 const Register qword_count = count; | |
1394 const Register end_from = from; // source array end address | |
1395 const Register end_to = to; // destination array end address | |
1396 // End pointers are inclusive, and if count is not zero they point | |
1397 // to the last unit copied: end_to[0] := end_from[0] | |
1398 | |
1399 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
1400 assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int. | |
1401 | |
1402 disjoint_byte_copy_entry = __ pc(); | |
1403 BLOCK_COMMENT("Entry:"); | |
1404 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
1405 | |
1406 setup_arg_regs(); // from => rdi, to => rsi, count => rdx | |
1407 // r9 and r10 may be used to save non-volatile registers | |
1408 | |
1409 // 'from', 'to' and 'count' are now valid | |
304 | 1410 __ movptr(byte_count, count); |
1411 __ shrptr(count, 3); // count => qword_count | |
0 | 1412 |
1413 // Copy from low to high addresses. Use 'to' as scratch. | |
304 | 1414 __ lea(end_from, Address(from, qword_count, Address::times_8, -8)); |
1415 __ lea(end_to, Address(to, qword_count, Address::times_8, -8)); | |
1416 __ negptr(qword_count); // make the count negative | |
0 | 1417 __ jmp(L_copy_32_bytes); |
1418 | |
1419 // Copy trailing qwords | |
1420 __ BIND(L_copy_8_bytes); | |
1421 __ movq(rax, Address(end_from, qword_count, Address::times_8, 8)); | |
1422 __ movq(Address(end_to, qword_count, Address::times_8, 8), rax); | |
304 | 1423 __ increment(qword_count); |
0 | 1424 __ jcc(Assembler::notZero, L_copy_8_bytes); |
1425 | |
1426 // Check for and copy trailing dword | |
1427 __ BIND(L_copy_4_bytes); | |
304 | 1428 __ testl(byte_count, 4); |
0 | 1429 __ jccb(Assembler::zero, L_copy_2_bytes); |
1430 __ movl(rax, Address(end_from, 8)); | |
1431 __ movl(Address(end_to, 8), rax); | |
1432 | |
304 | 1433 __ addptr(end_from, 4); |
1434 __ addptr(end_to, 4); | |
0 | 1435 |
1436 // Check for and copy trailing word | |
1437 __ BIND(L_copy_2_bytes); | |
304 | 1438 __ testl(byte_count, 2); |
0 | 1439 __ jccb(Assembler::zero, L_copy_byte); |
1440 __ movw(rax, Address(end_from, 8)); | |
1441 __ movw(Address(end_to, 8), rax); | |
1442 | |
304 | 1443 __ addptr(end_from, 2); |
1444 __ addptr(end_to, 2); | |
0 | 1445 |
1446 // Check for and copy trailing byte | |
1447 __ BIND(L_copy_byte); | |
304 | 1448 __ testl(byte_count, 1); |
0 | 1449 __ jccb(Assembler::zero, L_exit); |
1450 __ movb(rax, Address(end_from, 8)); | |
1451 __ movb(Address(end_to, 8), rax); | |
1452 | |
1453 __ BIND(L_exit); | |
1454 inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr); | |
1455 restore_arg_regs(); | |
304 | 1456 __ xorptr(rax, rax); // return 0 |
0 | 1457 __ leave(); // required for proper stackwalking of RuntimeStub frame |
1458 __ ret(0); | |
1459 | |
1460 // Copy in 32-bytes chunks | |
1461 copy_32_bytes_forward(end_from, end_to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes); | |
1462 __ jmp(L_copy_4_bytes); | |
1463 | |
1464 return start; | |
1465 } | |
1466 | |
1467 // Arguments: | |
1468 // aligned - true => Input and output aligned on a HeapWord == 8-byte boundary | |
1469 // ignored | |
1470 // name - stub name string | |
1471 // | |
1472 // Inputs: | |
1473 // c_rarg0 - source array address | |
1474 // c_rarg1 - destination array address | |
1475 // c_rarg2 - element count, treated as ssize_t, can be zero | |
1476 // | |
1477 // If 'from' and/or 'to' are aligned on 4-, 2-, or 1-byte boundaries, | |
1478 // we let the hardware handle it. The one to eight bytes within words, | |
1479 // dwords or qwords that span cache line boundaries will still be loaded | |
1480 // and stored atomically. | |
1481 // | |
1482 address generate_conjoint_byte_copy(bool aligned, const char *name) { | |
1483 __ align(CodeEntryAlignment); | |
1484 StubCodeMark mark(this, "StubRoutines", name); | |
1485 address start = __ pc(); | |
1486 | |
1487 Label L_copy_32_bytes, L_copy_8_bytes, L_copy_4_bytes, L_copy_2_bytes; | |
1488 const Register from = rdi; // source array address | |
1489 const Register to = rsi; // destination array address | |
1490 const Register count = rdx; // elements count | |
1491 const Register byte_count = rcx; | |
1492 const Register qword_count = count; | |
1493 | |
1494 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
1495 assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int. | |
1496 | |
1497 byte_copy_entry = __ pc(); | |
1498 BLOCK_COMMENT("Entry:"); | |
1499 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
1500 | |
1501 array_overlap_test(disjoint_byte_copy_entry, Address::times_1); | |
1502 setup_arg_regs(); // from => rdi, to => rsi, count => rdx | |
1503 // r9 and r10 may be used to save non-volatile registers | |
1504 | |
1505 // 'from', 'to' and 'count' are now valid | |
304 | 1506 __ movptr(byte_count, count); |
1507 __ shrptr(count, 3); // count => qword_count | |
0 | 1508 |
1509 // Copy from high to low addresses. | |
1510 | |
1511 // Check for and copy trailing byte | |
304 | 1512 __ testl(byte_count, 1); |
0 | 1513 __ jcc(Assembler::zero, L_copy_2_bytes); |
1514 __ movb(rax, Address(from, byte_count, Address::times_1, -1)); | |
1515 __ movb(Address(to, byte_count, Address::times_1, -1), rax); | |
304 | 1516 __ decrement(byte_count); // Adjust for possible trailing word |
0 | 1517 |
1518 // Check for and copy trailing word | |
1519 __ BIND(L_copy_2_bytes); | |
304 | 1520 __ testl(byte_count, 2); |
0 | 1521 __ jcc(Assembler::zero, L_copy_4_bytes); |
1522 __ movw(rax, Address(from, byte_count, Address::times_1, -2)); | |
1523 __ movw(Address(to, byte_count, Address::times_1, -2), rax); | |
1524 | |
1525 // Check for and copy trailing dword | |
1526 __ BIND(L_copy_4_bytes); | |
304 | 1527 __ testl(byte_count, 4); |
0 | 1528 __ jcc(Assembler::zero, L_copy_32_bytes); |
1529 __ movl(rax, Address(from, qword_count, Address::times_8)); | |
1530 __ movl(Address(to, qword_count, Address::times_8), rax); | |
1531 __ jmp(L_copy_32_bytes); | |
1532 | |
1533 // Copy trailing qwords | |
1534 __ BIND(L_copy_8_bytes); | |
1535 __ movq(rax, Address(from, qword_count, Address::times_8, -8)); | |
1536 __ movq(Address(to, qword_count, Address::times_8, -8), rax); | |
304 | 1537 __ decrement(qword_count); |
0 | 1538 __ jcc(Assembler::notZero, L_copy_8_bytes); |
1539 | |
1540 inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr); | |
1541 restore_arg_regs(); | |
304 | 1542 __ xorptr(rax, rax); // return 0 |
0 | 1543 __ leave(); // required for proper stackwalking of RuntimeStub frame |
1544 __ ret(0); | |
1545 | |
1546 // Copy in 32-bytes chunks | |
1547 copy_32_bytes_backward(from, to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes); | |
1548 | |
1549 inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr); | |
1550 restore_arg_regs(); | |
304 | 1551 __ xorptr(rax, rax); // return 0 |
0 | 1552 __ leave(); // required for proper stackwalking of RuntimeStub frame |
1553 __ ret(0); | |
1554 | |
1555 return start; | |
1556 } | |
1557 | |
1558 // Arguments: | |
1559 // aligned - true => Input and output aligned on a HeapWord == 8-byte boundary | |
1560 // ignored | |
1561 // name - stub name string | |
1562 // | |
1563 // Inputs: | |
1564 // c_rarg0 - source array address | |
1565 // c_rarg1 - destination array address | |
1566 // c_rarg2 - element count, treated as ssize_t, can be zero | |
1567 // | |
1568 // If 'from' and/or 'to' are aligned on 4- or 2-byte boundaries, we | |
1569 // let the hardware handle it. The two or four words within dwords | |
1570 // or qwords that span cache line boundaries will still be loaded | |
1571 // and stored atomically. | |
1572 // | |
1573 // Side Effects: | |
1574 // disjoint_short_copy_entry is set to the no-overlap entry point | |
1575 // used by generate_conjoint_short_copy(). | |
1576 // | |
1577 address generate_disjoint_short_copy(bool aligned, const char *name) { | |
1578 __ align(CodeEntryAlignment); | |
1579 StubCodeMark mark(this, "StubRoutines", name); | |
1580 address start = __ pc(); | |
1581 | |
1582 Label L_copy_32_bytes, L_copy_8_bytes, L_copy_4_bytes,L_copy_2_bytes,L_exit; | |
1583 const Register from = rdi; // source array address | |
1584 const Register to = rsi; // destination array address | |
1585 const Register count = rdx; // elements count | |
1586 const Register word_count = rcx; | |
1587 const Register qword_count = count; | |
1588 const Register end_from = from; // source array end address | |
1589 const Register end_to = to; // destination array end address | |
1590 // End pointers are inclusive, and if count is not zero they point | |
1591 // to the last unit copied: end_to[0] := end_from[0] | |
1592 | |
1593 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
1594 assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int. | |
1595 | |
1596 disjoint_short_copy_entry = __ pc(); | |
1597 BLOCK_COMMENT("Entry:"); | |
1598 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
1599 | |
1600 setup_arg_regs(); // from => rdi, to => rsi, count => rdx | |
1601 // r9 and r10 may be used to save non-volatile registers | |
1602 | |
1603 // 'from', 'to' and 'count' are now valid | |
304 | 1604 __ movptr(word_count, count); |
1605 __ shrptr(count, 2); // count => qword_count | |
0 | 1606 |
1607 // Copy from low to high addresses. Use 'to' as scratch. | |
304 | 1608 __ lea(end_from, Address(from, qword_count, Address::times_8, -8)); |
1609 __ lea(end_to, Address(to, qword_count, Address::times_8, -8)); | |
1610 __ negptr(qword_count); | |
0 | 1611 __ jmp(L_copy_32_bytes); |
1612 | |
1613 // Copy trailing qwords | |
1614 __ BIND(L_copy_8_bytes); | |
1615 __ movq(rax, Address(end_from, qword_count, Address::times_8, 8)); | |
1616 __ movq(Address(end_to, qword_count, Address::times_8, 8), rax); | |
304 | 1617 __ increment(qword_count); |
0 | 1618 __ jcc(Assembler::notZero, L_copy_8_bytes); |
1619 | |
1620 // Original 'dest' is trashed, so we can't use it as a | |
1621 // base register for a possible trailing word copy | |
1622 | |
1623 // Check for and copy trailing dword | |
1624 __ BIND(L_copy_4_bytes); | |
304 | 1625 __ testl(word_count, 2); |
0 | 1626 __ jccb(Assembler::zero, L_copy_2_bytes); |
1627 __ movl(rax, Address(end_from, 8)); | |
1628 __ movl(Address(end_to, 8), rax); | |
1629 | |
304 | 1630 __ addptr(end_from, 4); |
1631 __ addptr(end_to, 4); | |
0 | 1632 |
1633 // Check for and copy trailing word | |
1634 __ BIND(L_copy_2_bytes); | |
304 | 1635 __ testl(word_count, 1); |
0 | 1636 __ jccb(Assembler::zero, L_exit); |
1637 __ movw(rax, Address(end_from, 8)); | |
1638 __ movw(Address(end_to, 8), rax); | |
1639 | |
1640 __ BIND(L_exit); | |
1641 inc_counter_np(SharedRuntime::_jshort_array_copy_ctr); | |
1642 restore_arg_regs(); | |
304 | 1643 __ xorptr(rax, rax); // return 0 |
0 | 1644 __ leave(); // required for proper stackwalking of RuntimeStub frame |
1645 __ ret(0); | |
1646 | |
1647 // Copy in 32-bytes chunks | |
1648 copy_32_bytes_forward(end_from, end_to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes); | |
1649 __ jmp(L_copy_4_bytes); | |
1650 | |
1651 return start; | |
1652 } | |
1653 | |
1763 | 1654 address generate_fill(BasicType t, bool aligned, const char *name) { |
1655 __ align(CodeEntryAlignment); | |
1656 StubCodeMark mark(this, "StubRoutines", name); | |
1657 address start = __ pc(); | |
1658 | |
1659 BLOCK_COMMENT("Entry:"); | |
1660 | |
1661 const Register to = c_rarg0; // source array address | |
1662 const Register value = c_rarg1; // value | |
1663 const Register count = c_rarg2; // elements count | |
1664 | |
1665 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
1666 | |
1667 __ generate_fill(t, aligned, to, value, count, rax, xmm0); | |
1668 | |
1669 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
1670 __ ret(0); | |
1671 return start; | |
1672 } | |
1673 | |
0 | 1674 // Arguments: |
1675 // aligned - true => Input and output aligned on a HeapWord == 8-byte boundary | |
1676 // ignored | |
1677 // name - stub name string | |
1678 // | |
1679 // Inputs: | |
1680 // c_rarg0 - source array address | |
1681 // c_rarg1 - destination array address | |
1682 // c_rarg2 - element count, treated as ssize_t, can be zero | |
1683 // | |
1684 // If 'from' and/or 'to' are aligned on 4- or 2-byte boundaries, we | |
1685 // let the hardware handle it. The two or four words within dwords | |
1686 // or qwords that span cache line boundaries will still be loaded | |
1687 // and stored atomically. | |
1688 // | |
1689 address generate_conjoint_short_copy(bool aligned, const char *name) { | |
1690 __ align(CodeEntryAlignment); | |
1691 StubCodeMark mark(this, "StubRoutines", name); | |
1692 address start = __ pc(); | |
1693 | |
1694 Label L_copy_32_bytes, L_copy_8_bytes, L_copy_4_bytes; | |
1695 const Register from = rdi; // source array address | |
1696 const Register to = rsi; // destination array address | |
1697 const Register count = rdx; // elements count | |
1698 const Register word_count = rcx; | |
1699 const Register qword_count = count; | |
1700 | |
1701 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
1702 assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int. | |
1703 | |
1704 short_copy_entry = __ pc(); | |
1705 BLOCK_COMMENT("Entry:"); | |
1706 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
1707 | |
1708 array_overlap_test(disjoint_short_copy_entry, Address::times_2); | |
1709 setup_arg_regs(); // from => rdi, to => rsi, count => rdx | |
1710 // r9 and r10 may be used to save non-volatile registers | |
1711 | |
1712 // 'from', 'to' and 'count' are now valid | |
304 | 1713 __ movptr(word_count, count); |
1714 __ shrptr(count, 2); // count => qword_count | |
0 | 1715 |
1716 // Copy from high to low addresses. Use 'to' as scratch. | |
1717 | |
1718 // Check for and copy trailing word | |
304 | 1719 __ testl(word_count, 1); |
0 | 1720 __ jccb(Assembler::zero, L_copy_4_bytes); |
1721 __ movw(rax, Address(from, word_count, Address::times_2, -2)); | |
1722 __ movw(Address(to, word_count, Address::times_2, -2), rax); | |
1723 | |
1724 // Check for and copy trailing dword | |
1725 __ BIND(L_copy_4_bytes); | |
304 | 1726 __ testl(word_count, 2); |
0 | 1727 __ jcc(Assembler::zero, L_copy_32_bytes); |
1728 __ movl(rax, Address(from, qword_count, Address::times_8)); | |
1729 __ movl(Address(to, qword_count, Address::times_8), rax); | |
1730 __ jmp(L_copy_32_bytes); | |
1731 | |
1732 // Copy trailing qwords | |
1733 __ BIND(L_copy_8_bytes); | |
1734 __ movq(rax, Address(from, qword_count, Address::times_8, -8)); | |
1735 __ movq(Address(to, qword_count, Address::times_8, -8), rax); | |
304 | 1736 __ decrement(qword_count); |
0 | 1737 __ jcc(Assembler::notZero, L_copy_8_bytes); |
1738 | |
1739 inc_counter_np(SharedRuntime::_jshort_array_copy_ctr); | |
1740 restore_arg_regs(); | |
304 | 1741 __ xorptr(rax, rax); // return 0 |
0 | 1742 __ leave(); // required for proper stackwalking of RuntimeStub frame |
1743 __ ret(0); | |
1744 | |
1745 // Copy in 32-bytes chunks | |
1746 copy_32_bytes_backward(from, to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes); | |
1747 | |
1748 inc_counter_np(SharedRuntime::_jshort_array_copy_ctr); | |
1749 restore_arg_regs(); | |
304 | 1750 __ xorptr(rax, rax); // return 0 |
0 | 1751 __ leave(); // required for proper stackwalking of RuntimeStub frame |
1752 __ ret(0); | |
1753 | |
1754 return start; | |
1755 } | |
1756 | |
1757 // Arguments: | |
1758 // aligned - true => Input and output aligned on a HeapWord == 8-byte boundary | |
1759 // ignored | |
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1760 // is_oop - true => oop array, so generate store check code |
0 | 1761 // name - stub name string |
1762 // | |
1763 // Inputs: | |
1764 // c_rarg0 - source array address | |
1765 // c_rarg1 - destination array address | |
1766 // c_rarg2 - element count, treated as ssize_t, can be zero | |
1767 // | |
1768 // If 'from' and/or 'to' are aligned on 4-byte boundaries, we let | |
1769 // the hardware handle it. The two dwords within qwords that span | |
1770 // cache line boundaries will still be loaded and stored atomicly. | |
1771 // | |
1772 // Side Effects: | |
1773 // disjoint_int_copy_entry is set to the no-overlap entry point | |
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1774 // used by generate_conjoint_int_oop_copy(). |
0 | 1775 // |
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1776 address generate_disjoint_int_oop_copy(bool aligned, bool is_oop, const char *name) { |
0 | 1777 __ align(CodeEntryAlignment); |
1778 StubCodeMark mark(this, "StubRoutines", name); | |
1779 address start = __ pc(); | |
1780 | |
1781 Label L_copy_32_bytes, L_copy_8_bytes, L_copy_4_bytes, L_exit; | |
1782 const Register from = rdi; // source array address | |
1783 const Register to = rsi; // destination array address | |
1784 const Register count = rdx; // elements count | |
1785 const Register dword_count = rcx; | |
1786 const Register qword_count = count; | |
1787 const Register end_from = from; // source array end address | |
1788 const Register end_to = to; // destination array end address | |
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1789 const Register saved_to = r11; // saved destination array address |
0 | 1790 // End pointers are inclusive, and if count is not zero they point |
1791 // to the last unit copied: end_to[0] := end_from[0] | |
1792 | |
1793 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
1794 assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int. | |
1795 | |
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1796 (is_oop ? disjoint_oop_copy_entry : disjoint_int_copy_entry) = __ pc(); |
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1797 |
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1798 if (is_oop) { |
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1799 // no registers are destroyed by this call |
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1800 gen_write_ref_array_pre_barrier(/* dest */ c_rarg1, /* count */ c_rarg2); |
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1801 } |
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1802 |
0 | 1803 BLOCK_COMMENT("Entry:"); |
1804 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
1805 | |
1806 setup_arg_regs(); // from => rdi, to => rsi, count => rdx | |
1807 // r9 and r10 may be used to save non-volatile registers | |
1808 | |
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1809 if (is_oop) { |
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1810 __ movq(saved_to, to); |
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1811 } |
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1812 |
0 | 1813 // 'from', 'to' and 'count' are now valid |
304 | 1814 __ movptr(dword_count, count); |
1815 __ shrptr(count, 1); // count => qword_count | |
0 | 1816 |
1817 // Copy from low to high addresses. Use 'to' as scratch. | |
304 | 1818 __ lea(end_from, Address(from, qword_count, Address::times_8, -8)); |
1819 __ lea(end_to, Address(to, qword_count, Address::times_8, -8)); | |
1820 __ negptr(qword_count); | |
0 | 1821 __ jmp(L_copy_32_bytes); |
1822 | |
1823 // Copy trailing qwords | |
1824 __ BIND(L_copy_8_bytes); | |
1825 __ movq(rax, Address(end_from, qword_count, Address::times_8, 8)); | |
1826 __ movq(Address(end_to, qword_count, Address::times_8, 8), rax); | |
304 | 1827 __ increment(qword_count); |
0 | 1828 __ jcc(Assembler::notZero, L_copy_8_bytes); |
1829 | |
1830 // Check for and copy trailing dword | |
1831 __ BIND(L_copy_4_bytes); | |
304 | 1832 __ testl(dword_count, 1); // Only byte test since the value is 0 or 1 |
0 | 1833 __ jccb(Assembler::zero, L_exit); |
1834 __ movl(rax, Address(end_from, 8)); | |
1835 __ movl(Address(end_to, 8), rax); | |
1836 | |
1837 __ BIND(L_exit); | |
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1838 if (is_oop) { |
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1839 __ leaq(end_to, Address(saved_to, dword_count, Address::times_4, -4)); |
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1840 gen_write_ref_array_post_barrier(saved_to, end_to, rax); |
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1841 } |
0 | 1842 inc_counter_np(SharedRuntime::_jint_array_copy_ctr); |
1843 restore_arg_regs(); | |
304 | 1844 __ xorptr(rax, rax); // return 0 |
0 | 1845 __ leave(); // required for proper stackwalking of RuntimeStub frame |
1846 __ ret(0); | |
1847 | |
1848 // Copy 32-bytes chunks | |
1849 copy_32_bytes_forward(end_from, end_to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes); | |
1850 __ jmp(L_copy_4_bytes); | |
1851 | |
1852 return start; | |
1853 } | |
1854 | |
1855 // Arguments: | |
1856 // aligned - true => Input and output aligned on a HeapWord == 8-byte boundary | |
1857 // ignored | |
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1858 // is_oop - true => oop array, so generate store check code |
0 | 1859 // name - stub name string |
1860 // | |
1861 // Inputs: | |
1862 // c_rarg0 - source array address | |
1863 // c_rarg1 - destination array address | |
1864 // c_rarg2 - element count, treated as ssize_t, can be zero | |
1865 // | |
1866 // If 'from' and/or 'to' are aligned on 4-byte boundaries, we let | |
1867 // the hardware handle it. The two dwords within qwords that span | |
1868 // cache line boundaries will still be loaded and stored atomicly. | |
1869 // | |
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1870 address generate_conjoint_int_oop_copy(bool aligned, bool is_oop, const char *name) { |
0 | 1871 __ align(CodeEntryAlignment); |
1872 StubCodeMark mark(this, "StubRoutines", name); | |
1873 address start = __ pc(); | |
1874 | |
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1875 Label L_copy_32_bytes, L_copy_8_bytes, L_copy_2_bytes, L_exit; |
0 | 1876 const Register from = rdi; // source array address |
1877 const Register to = rsi; // destination array address | |
1878 const Register count = rdx; // elements count | |
1879 const Register dword_count = rcx; | |
1880 const Register qword_count = count; | |
1881 | |
1882 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
1883 assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int. | |
1884 | |
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1885 if (is_oop) { |
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1886 // no registers are destroyed by this call |
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1887 gen_write_ref_array_pre_barrier(/* dest */ c_rarg1, /* count */ c_rarg2); |
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1888 } |
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1889 |
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1890 (is_oop ? oop_copy_entry : int_copy_entry) = __ pc(); |
0 | 1891 BLOCK_COMMENT("Entry:"); |
1892 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
1893 | |
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1894 array_overlap_test(is_oop ? disjoint_oop_copy_entry : disjoint_int_copy_entry, |
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1895 Address::times_4); |
0 | 1896 setup_arg_regs(); // from => rdi, to => rsi, count => rdx |
1897 // r9 and r10 may be used to save non-volatile registers | |
1898 | |
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1899 assert_clean_int(count, rax); // Make sure 'count' is clean int. |
0 | 1900 // 'from', 'to' and 'count' are now valid |
304 | 1901 __ movptr(dword_count, count); |
1902 __ shrptr(count, 1); // count => qword_count | |
0 | 1903 |
1904 // Copy from high to low addresses. Use 'to' as scratch. | |
1905 | |
1906 // Check for and copy trailing dword | |
304 | 1907 __ testl(dword_count, 1); |
0 | 1908 __ jcc(Assembler::zero, L_copy_32_bytes); |
1909 __ movl(rax, Address(from, dword_count, Address::times_4, -4)); | |
1910 __ movl(Address(to, dword_count, Address::times_4, -4), rax); | |
1911 __ jmp(L_copy_32_bytes); | |
1912 | |
1913 // Copy trailing qwords | |
1914 __ BIND(L_copy_8_bytes); | |
1915 __ movq(rax, Address(from, qword_count, Address::times_8, -8)); | |
1916 __ movq(Address(to, qword_count, Address::times_8, -8), rax); | |
304 | 1917 __ decrement(qword_count); |
0 | 1918 __ jcc(Assembler::notZero, L_copy_8_bytes); |
1919 | |
1920 inc_counter_np(SharedRuntime::_jint_array_copy_ctr); | |
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1921 if (is_oop) { |
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1922 __ jmp(L_exit); |
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1923 } |
0 | 1924 restore_arg_regs(); |
304 | 1925 __ xorptr(rax, rax); // return 0 |
0 | 1926 __ leave(); // required for proper stackwalking of RuntimeStub frame |
1927 __ ret(0); | |
1928 | |
1929 // Copy in 32-bytes chunks | |
1930 copy_32_bytes_backward(from, to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes); | |
1931 | |
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1932 inc_counter_np(SharedRuntime::_jint_array_copy_ctr); |
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1933 __ bind(L_exit); |
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1934 if (is_oop) { |
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1935 Register end_to = rdx; |
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1936 __ leaq(end_to, Address(to, dword_count, Address::times_4, -4)); |
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1937 gen_write_ref_array_post_barrier(to, end_to, rax); |
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1938 } |
0 | 1939 restore_arg_regs(); |
304 | 1940 __ xorptr(rax, rax); // return 0 |
0 | 1941 __ leave(); // required for proper stackwalking of RuntimeStub frame |
1942 __ ret(0); | |
1943 | |
1944 return start; | |
1945 } | |
1946 | |
1947 // Arguments: | |
1948 // aligned - true => Input and output aligned on a HeapWord boundary == 8 bytes | |
1949 // ignored | |
1950 // is_oop - true => oop array, so generate store check code | |
1951 // name - stub name string | |
1952 // | |
1953 // Inputs: | |
1954 // c_rarg0 - source array address | |
1955 // c_rarg1 - destination array address | |
1956 // c_rarg2 - element count, treated as ssize_t, can be zero | |
1957 // | |
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1958 // Side Effects: |
0 | 1959 // disjoint_oop_copy_entry or disjoint_long_copy_entry is set to the |
1960 // no-overlap entry point used by generate_conjoint_long_oop_copy(). | |
1961 // | |
1962 address generate_disjoint_long_oop_copy(bool aligned, bool is_oop, const char *name) { | |
1963 __ align(CodeEntryAlignment); | |
1964 StubCodeMark mark(this, "StubRoutines", name); | |
1965 address start = __ pc(); | |
1966 | |
1967 Label L_copy_32_bytes, L_copy_8_bytes, L_exit; | |
1968 const Register from = rdi; // source array address | |
1969 const Register to = rsi; // destination array address | |
1970 const Register qword_count = rdx; // elements count | |
1971 const Register end_from = from; // source array end address | |
1972 const Register end_to = rcx; // destination array end address | |
1973 const Register saved_to = to; | |
1974 // End pointers are inclusive, and if count is not zero they point | |
1975 // to the last unit copied: end_to[0] := end_from[0] | |
1976 | |
1977 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
1978 // Save no-overlap entry point for generate_conjoint_long_oop_copy() | |
1979 assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int. | |
1980 | |
1981 if (is_oop) { | |
1982 disjoint_oop_copy_entry = __ pc(); | |
1983 // no registers are destroyed by this call | |
1984 gen_write_ref_array_pre_barrier(/* dest */ c_rarg1, /* count */ c_rarg2); | |
1985 } else { | |
1986 disjoint_long_copy_entry = __ pc(); | |
1987 } | |
1988 BLOCK_COMMENT("Entry:"); | |
1989 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
1990 | |
1991 setup_arg_regs(); // from => rdi, to => rsi, count => rdx | |
1992 // r9 and r10 may be used to save non-volatile registers | |
1993 | |
1994 // 'from', 'to' and 'qword_count' are now valid | |
1995 | |
1996 // Copy from low to high addresses. Use 'to' as scratch. | |
304 | 1997 __ lea(end_from, Address(from, qword_count, Address::times_8, -8)); |
1998 __ lea(end_to, Address(to, qword_count, Address::times_8, -8)); | |
1999 __ negptr(qword_count); | |
0 | 2000 __ jmp(L_copy_32_bytes); |
2001 | |
2002 // Copy trailing qwords | |
2003 __ BIND(L_copy_8_bytes); | |
2004 __ movq(rax, Address(end_from, qword_count, Address::times_8, 8)); | |
2005 __ movq(Address(end_to, qword_count, Address::times_8, 8), rax); | |
304 | 2006 __ increment(qword_count); |
0 | 2007 __ jcc(Assembler::notZero, L_copy_8_bytes); |
2008 | |
2009 if (is_oop) { | |
2010 __ jmp(L_exit); | |
2011 } else { | |
2012 inc_counter_np(SharedRuntime::_jlong_array_copy_ctr); | |
2013 restore_arg_regs(); | |
304 | 2014 __ xorptr(rax, rax); // return 0 |
0 | 2015 __ leave(); // required for proper stackwalking of RuntimeStub frame |
2016 __ ret(0); | |
2017 } | |
2018 | |
2019 // Copy 64-byte chunks | |
2020 copy_32_bytes_forward(end_from, end_to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes); | |
2021 | |
2022 if (is_oop) { | |
2023 __ BIND(L_exit); | |
2024 gen_write_ref_array_post_barrier(saved_to, end_to, rax); | |
2025 inc_counter_np(SharedRuntime::_oop_array_copy_ctr); | |
2026 } else { | |
2027 inc_counter_np(SharedRuntime::_jlong_array_copy_ctr); | |
2028 } | |
2029 restore_arg_regs(); | |
304 | 2030 __ xorptr(rax, rax); // return 0 |
0 | 2031 __ leave(); // required for proper stackwalking of RuntimeStub frame |
2032 __ ret(0); | |
2033 | |
2034 return start; | |
2035 } | |
2036 | |
2037 // Arguments: | |
2038 // aligned - true => Input and output aligned on a HeapWord boundary == 8 bytes | |
2039 // ignored | |
2040 // is_oop - true => oop array, so generate store check code | |
2041 // name - stub name string | |
2042 // | |
2043 // Inputs: | |
2044 // c_rarg0 - source array address | |
2045 // c_rarg1 - destination array address | |
2046 // c_rarg2 - element count, treated as ssize_t, can be zero | |
2047 // | |
2048 address generate_conjoint_long_oop_copy(bool aligned, bool is_oop, const char *name) { | |
2049 __ align(CodeEntryAlignment); | |
2050 StubCodeMark mark(this, "StubRoutines", name); | |
2051 address start = __ pc(); | |
2052 | |
2053 Label L_copy_32_bytes, L_copy_8_bytes, L_exit; | |
2054 const Register from = rdi; // source array address | |
2055 const Register to = rsi; // destination array address | |
2056 const Register qword_count = rdx; // elements count | |
2057 const Register saved_count = rcx; | |
2058 | |
2059 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
2060 assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int. | |
2061 | |
2062 address disjoint_copy_entry = NULL; | |
2063 if (is_oop) { | |
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2064 assert(!UseCompressedOops, "shouldn't be called for compressed oops"); |
0 | 2065 disjoint_copy_entry = disjoint_oop_copy_entry; |
2066 oop_copy_entry = __ pc(); | |
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2067 array_overlap_test(disjoint_oop_copy_entry, Address::times_8); |
0 | 2068 } else { |
2069 disjoint_copy_entry = disjoint_long_copy_entry; | |
2070 long_copy_entry = __ pc(); | |
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2071 array_overlap_test(disjoint_long_copy_entry, Address::times_8); |
0 | 2072 } |
2073 BLOCK_COMMENT("Entry:"); | |
2074 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
2075 | |
2076 array_overlap_test(disjoint_copy_entry, Address::times_8); | |
2077 setup_arg_regs(); // from => rdi, to => rsi, count => rdx | |
2078 // r9 and r10 may be used to save non-volatile registers | |
2079 | |
2080 // 'from', 'to' and 'qword_count' are now valid | |
2081 | |
2082 if (is_oop) { | |
2083 // Save to and count for store barrier | |
304 | 2084 __ movptr(saved_count, qword_count); |
0 | 2085 // No registers are destroyed by this call |
2086 gen_write_ref_array_pre_barrier(to, saved_count); | |
2087 } | |
2088 | |
2089 __ jmp(L_copy_32_bytes); | |
2090 | |
2091 // Copy trailing qwords | |
2092 __ BIND(L_copy_8_bytes); | |
2093 __ movq(rax, Address(from, qword_count, Address::times_8, -8)); | |
2094 __ movq(Address(to, qword_count, Address::times_8, -8), rax); | |
304 | 2095 __ decrement(qword_count); |
0 | 2096 __ jcc(Assembler::notZero, L_copy_8_bytes); |
2097 | |
2098 if (is_oop) { | |
2099 __ jmp(L_exit); | |
2100 } else { | |
2101 inc_counter_np(SharedRuntime::_jlong_array_copy_ctr); | |
2102 restore_arg_regs(); | |
304 | 2103 __ xorptr(rax, rax); // return 0 |
0 | 2104 __ leave(); // required for proper stackwalking of RuntimeStub frame |
2105 __ ret(0); | |
2106 } | |
2107 | |
2108 // Copy in 32-bytes chunks | |
2109 copy_32_bytes_backward(from, to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes); | |
2110 | |
2111 if (is_oop) { | |
2112 __ BIND(L_exit); | |
304 | 2113 __ lea(rcx, Address(to, saved_count, Address::times_8, -8)); |
0 | 2114 gen_write_ref_array_post_barrier(to, rcx, rax); |
2115 inc_counter_np(SharedRuntime::_oop_array_copy_ctr); | |
2116 } else { | |
2117 inc_counter_np(SharedRuntime::_jlong_array_copy_ctr); | |
2118 } | |
2119 restore_arg_regs(); | |
304 | 2120 __ xorptr(rax, rax); // return 0 |
0 | 2121 __ leave(); // required for proper stackwalking of RuntimeStub frame |
2122 __ ret(0); | |
2123 | |
2124 return start; | |
2125 } | |
2126 | |
2127 | |
2128 // Helper for generating a dynamic type check. | |
2129 // Smashes no registers. | |
2130 void generate_type_check(Register sub_klass, | |
2131 Register super_check_offset, | |
2132 Register super_klass, | |
2133 Label& L_success) { | |
2134 assert_different_registers(sub_klass, super_check_offset, super_klass); | |
2135 | |
2136 BLOCK_COMMENT("type_check:"); | |
2137 | |
2138 Label L_miss; | |
2139 | |
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2140 __ check_klass_subtype_fast_path(sub_klass, super_klass, noreg, &L_success, &L_miss, NULL, |
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2141 super_check_offset); |
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2142 __ check_klass_subtype_slow_path(sub_klass, super_klass, noreg, noreg, &L_success, NULL); |
0 | 2143 |
2144 // Fall through on failure! | |
2145 __ BIND(L_miss); | |
2146 } | |
2147 | |
2148 // | |
2149 // Generate checkcasting array copy stub | |
2150 // | |
2151 // Input: | |
2152 // c_rarg0 - source array address | |
2153 // c_rarg1 - destination array address | |
2154 // c_rarg2 - element count, treated as ssize_t, can be zero | |
2155 // c_rarg3 - size_t ckoff (super_check_offset) | |
2156 // not Win64 | |
2157 // c_rarg4 - oop ckval (super_klass) | |
2158 // Win64 | |
2159 // rsp+40 - oop ckval (super_klass) | |
2160 // | |
2161 // Output: | |
2162 // rax == 0 - success | |
2163 // rax == -1^K - failure, where K is partial transfer count | |
2164 // | |
2165 address generate_checkcast_copy(const char *name) { | |
2166 | |
2167 Label L_load_element, L_store_element, L_do_card_marks, L_done; | |
2168 | |
2169 // Input registers (after setup_arg_regs) | |
2170 const Register from = rdi; // source array address | |
2171 const Register to = rsi; // destination array address | |
2172 const Register length = rdx; // elements count | |
2173 const Register ckoff = rcx; // super_check_offset | |
2174 const Register ckval = r8; // super_klass | |
2175 | |
2176 // Registers used as temps (r13, r14 are save-on-entry) | |
2177 const Register end_from = from; // source array end address | |
2178 const Register end_to = r13; // destination array end address | |
2179 const Register count = rdx; // -(count_remaining) | |
2180 const Register r14_length = r14; // saved copy of length | |
2181 // End pointers are inclusive, and if length is not zero they point | |
2182 // to the last unit copied: end_to[0] := end_from[0] | |
2183 | |
2184 const Register rax_oop = rax; // actual oop copied | |
2185 const Register r11_klass = r11; // oop._klass | |
2186 | |
2187 //--------------------------------------------------------------- | |
2188 // Assembler stub will be used for this call to arraycopy | |
2189 // if the two arrays are subtypes of Object[] but the | |
2190 // destination array type is not equal to or a supertype | |
2191 // of the source type. Each element must be separately | |
2192 // checked. | |
2193 | |
2194 __ align(CodeEntryAlignment); | |
2195 StubCodeMark mark(this, "StubRoutines", name); | |
2196 address start = __ pc(); | |
2197 | |
2198 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
2199 | |
2200 #ifdef ASSERT | |
2201 // caller guarantees that the arrays really are different | |
2202 // otherwise, we would have to make conjoint checks | |
2203 { Label L; | |
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2204 array_overlap_test(L, TIMES_OOP); |
0 | 2205 __ stop("checkcast_copy within a single array"); |
2206 __ bind(L); | |
2207 } | |
2208 #endif //ASSERT | |
2209 | |
2210 setup_arg_regs(4); // from => rdi, to => rsi, length => rdx | |
2211 // ckoff => rcx, ckval => r8 | |
2212 // r9 and r10 may be used to save non-volatile registers | |
2213 #ifdef _WIN64 | |
2214 // last argument (#4) is on stack on Win64 | |
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2215 __ movptr(ckval, Address(rsp, 6 * wordSize)); |
0 | 2216 #endif |
2217 | |
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2218 // Caller of this entry point must set up the argument registers. |
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2219 checkcast_copy_entry = __ pc(); |
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2220 BLOCK_COMMENT("Entry:"); |
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2221 |
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2222 // allocate spill slots for r13, r14 |
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2223 enum { |
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2224 saved_r13_offset, |
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2225 saved_r14_offset, |
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2226 saved_rbp_offset |
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2227 }; |
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2228 __ subptr(rsp, saved_rbp_offset * wordSize); |
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2229 __ movptr(Address(rsp, saved_r13_offset * wordSize), r13); |
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2230 __ movptr(Address(rsp, saved_r14_offset * wordSize), r14); |
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2231 |
0 | 2232 // check that int operands are properly extended to size_t |
2233 assert_clean_int(length, rax); | |
2234 assert_clean_int(ckoff, rax); | |
2235 | |
2236 #ifdef ASSERT | |
2237 BLOCK_COMMENT("assert consistent ckoff/ckval"); | |
2238 // The ckoff and ckval must be mutually consistent, | |
2239 // even though caller generates both. | |
2240 { Label L; | |
2241 int sco_offset = (klassOopDesc::header_size() * HeapWordSize + | |
2242 Klass::super_check_offset_offset_in_bytes()); | |
2243 __ cmpl(ckoff, Address(ckval, sco_offset)); | |
2244 __ jcc(Assembler::equal, L); | |
2245 __ stop("super_check_offset inconsistent"); | |
2246 __ bind(L); | |
2247 } | |
2248 #endif //ASSERT | |
2249 | |
2250 // Loop-invariant addresses. They are exclusive end pointers. | |
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2251 Address end_from_addr(from, length, TIMES_OOP, 0); |
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2252 Address end_to_addr(to, length, TIMES_OOP, 0); |
0 | 2253 // Loop-variant addresses. They assume post-incremented count < 0. |
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2254 Address from_element_addr(end_from, count, TIMES_OOP, 0); |
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2255 Address to_element_addr(end_to, count, TIMES_OOP, 0); |
0 | 2256 |
2257 gen_write_ref_array_pre_barrier(to, count); | |
2258 | |
2259 // Copy from low to high addresses, indexed from the end of each array. | |
304 | 2260 __ lea(end_from, end_from_addr); |
2261 __ lea(end_to, end_to_addr); | |
2262 __ movptr(r14_length, length); // save a copy of the length | |
2263 assert(length == count, ""); // else fix next line: | |
2264 __ negptr(count); // negate and test the length | |
0 | 2265 __ jcc(Assembler::notZero, L_load_element); |
2266 | |
2267 // Empty array: Nothing to do. | |
304 | 2268 __ xorptr(rax, rax); // return 0 on (trivial) success |
0 | 2269 __ jmp(L_done); |
2270 | |
2271 // ======== begin loop ======== | |
2272 // (Loop is rotated; its entry is L_load_element.) | |
2273 // Loop control: | |
2274 // for (count = -count; count != 0; count++) | |
2275 // Base pointers src, dst are biased by 8*(count-1),to last element. | |
1365 | 2276 __ align(OptoLoopAlignment); |
0 | 2277 |
2278 __ BIND(L_store_element); | |
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2279 __ store_heap_oop(to_element_addr, rax_oop); // store the oop |
304 | 2280 __ increment(count); // increment the count toward zero |
0 | 2281 __ jcc(Assembler::zero, L_do_card_marks); |
2282 | |
2283 // ======== loop entry is here ======== | |
2284 __ BIND(L_load_element); | |
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2285 __ load_heap_oop(rax_oop, from_element_addr); // load the oop |
304 | 2286 __ testptr(rax_oop, rax_oop); |
0 | 2287 __ jcc(Assembler::zero, L_store_element); |
2288 | |
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2289 __ load_klass(r11_klass, rax_oop);// query the object klass |
0 | 2290 generate_type_check(r11_klass, ckoff, ckval, L_store_element); |
2291 // ======== end loop ======== | |
2292 | |
2293 // It was a real error; we must depend on the caller to finish the job. | |
2294 // Register rdx = -1 * number of *remaining* oops, r14 = *total* oops. | |
2295 // Emit GC store barriers for the oops we have copied (r14 + rdx), | |
2296 // and report their number to the caller. | |
2297 assert_different_registers(rax, r14_length, count, to, end_to, rcx); | |
304 | 2298 __ lea(end_to, to_element_addr); |
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2299 __ addptr(end_to, -heapOopSize); // make an inclusive end pointer |
362 | 2300 gen_write_ref_array_post_barrier(to, end_to, rscratch1); |
304 | 2301 __ movptr(rax, r14_length); // original oops |
2302 __ addptr(rax, count); // K = (original - remaining) oops | |
2303 __ notptr(rax); // report (-1^K) to caller | |
0 | 2304 __ jmp(L_done); |
2305 | |
2306 // Come here on success only. | |
2307 __ BIND(L_do_card_marks); | |
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2308 __ addptr(end_to, -heapOopSize); // make an inclusive end pointer |
362 | 2309 gen_write_ref_array_post_barrier(to, end_to, rscratch1); |
304 | 2310 __ xorptr(rax, rax); // return 0 on success |
0 | 2311 |
2312 // Common exit point (success or failure). | |
2313 __ BIND(L_done); | |
304 | 2314 __ movptr(r13, Address(rsp, saved_r13_offset * wordSize)); |
2315 __ movptr(r14, Address(rsp, saved_r14_offset * wordSize)); | |
0 | 2316 inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr); |
2317 restore_arg_regs(); | |
2318 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
2319 __ ret(0); | |
2320 | |
2321 return start; | |
2322 } | |
2323 | |
2324 // | |
2325 // Generate 'unsafe' array copy stub | |
2326 // Though just as safe as the other stubs, it takes an unscaled | |
2327 // size_t argument instead of an element count. | |
2328 // | |
2329 // Input: | |
2330 // c_rarg0 - source array address | |
2331 // c_rarg1 - destination array address | |
2332 // c_rarg2 - byte count, treated as ssize_t, can be zero | |
2333 // | |
2334 // Examines the alignment of the operands and dispatches | |
2335 // to a long, int, short, or byte copy loop. | |
2336 // | |
2337 address generate_unsafe_copy(const char *name) { | |
2338 | |
2339 Label L_long_aligned, L_int_aligned, L_short_aligned; | |
2340 | |
2341 // Input registers (before setup_arg_regs) | |
2342 const Register from = c_rarg0; // source array address | |
2343 const Register to = c_rarg1; // destination array address | |
2344 const Register size = c_rarg2; // byte count (size_t) | |
2345 | |
2346 // Register used as a temp | |
2347 const Register bits = rax; // test copy of low bits | |
2348 | |
2349 __ align(CodeEntryAlignment); | |
2350 StubCodeMark mark(this, "StubRoutines", name); | |
2351 address start = __ pc(); | |
2352 | |
2353 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
2354 | |
2355 // bump this on entry, not on exit: | |
2356 inc_counter_np(SharedRuntime::_unsafe_array_copy_ctr); | |
2357 | |
304 | 2358 __ mov(bits, from); |
2359 __ orptr(bits, to); | |
2360 __ orptr(bits, size); | |
0 | 2361 |
2362 __ testb(bits, BytesPerLong-1); | |
2363 __ jccb(Assembler::zero, L_long_aligned); | |
2364 | |
2365 __ testb(bits, BytesPerInt-1); | |
2366 __ jccb(Assembler::zero, L_int_aligned); | |
2367 | |
2368 __ testb(bits, BytesPerShort-1); | |
2369 __ jump_cc(Assembler::notZero, RuntimeAddress(byte_copy_entry)); | |
2370 | |
2371 __ BIND(L_short_aligned); | |
304 | 2372 __ shrptr(size, LogBytesPerShort); // size => short_count |
0 | 2373 __ jump(RuntimeAddress(short_copy_entry)); |
2374 | |
2375 __ BIND(L_int_aligned); | |
304 | 2376 __ shrptr(size, LogBytesPerInt); // size => int_count |
0 | 2377 __ jump(RuntimeAddress(int_copy_entry)); |
2378 | |
2379 __ BIND(L_long_aligned); | |
304 | 2380 __ shrptr(size, LogBytesPerLong); // size => qword_count |
0 | 2381 __ jump(RuntimeAddress(long_copy_entry)); |
2382 | |
2383 return start; | |
2384 } | |
2385 | |
2386 // Perform range checks on the proposed arraycopy. | |
2387 // Kills temp, but nothing else. | |
2388 // Also, clean the sign bits of src_pos and dst_pos. | |
2389 void arraycopy_range_checks(Register src, // source array oop (c_rarg0) | |
2390 Register src_pos, // source position (c_rarg1) | |
2391 Register dst, // destination array oo (c_rarg2) | |
2392 Register dst_pos, // destination position (c_rarg3) | |
2393 Register length, | |
2394 Register temp, | |
2395 Label& L_failed) { | |
2396 BLOCK_COMMENT("arraycopy_range_checks:"); | |
2397 | |
2398 // if (src_pos + length > arrayOop(src)->length()) FAIL; | |
2399 __ movl(temp, length); | |
2400 __ addl(temp, src_pos); // src_pos + length | |
2401 __ cmpl(temp, Address(src, arrayOopDesc::length_offset_in_bytes())); | |
2402 __ jcc(Assembler::above, L_failed); | |
2403 | |
2404 // if (dst_pos + length > arrayOop(dst)->length()) FAIL; | |
2405 __ movl(temp, length); | |
2406 __ addl(temp, dst_pos); // dst_pos + length | |
2407 __ cmpl(temp, Address(dst, arrayOopDesc::length_offset_in_bytes())); | |
2408 __ jcc(Assembler::above, L_failed); | |
2409 | |
2410 // Have to clean up high 32-bits of 'src_pos' and 'dst_pos'. | |
2411 // Move with sign extension can be used since they are positive. | |
2412 __ movslq(src_pos, src_pos); | |
2413 __ movslq(dst_pos, dst_pos); | |
2414 | |
2415 BLOCK_COMMENT("arraycopy_range_checks done"); | |
2416 } | |
2417 | |
2418 // | |
2419 // Generate generic array copy stubs | |
2420 // | |
2421 // Input: | |
2422 // c_rarg0 - src oop | |
2423 // c_rarg1 - src_pos (32-bits) | |
2424 // c_rarg2 - dst oop | |
2425 // c_rarg3 - dst_pos (32-bits) | |
2426 // not Win64 | |
2427 // c_rarg4 - element count (32-bits) | |
2428 // Win64 | |
2429 // rsp+40 - element count (32-bits) | |
2430 // | |
2431 // Output: | |
2432 // rax == 0 - success | |
2433 // rax == -1^K - failure, where K is partial transfer count | |
2434 // | |
2435 address generate_generic_copy(const char *name) { | |
2436 | |
2437 Label L_failed, L_failed_0, L_objArray; | |
2438 Label L_copy_bytes, L_copy_shorts, L_copy_ints, L_copy_longs; | |
2439 | |
2440 // Input registers | |
2441 const Register src = c_rarg0; // source array oop | |
2442 const Register src_pos = c_rarg1; // source position | |
2443 const Register dst = c_rarg2; // destination array oop | |
2444 const Register dst_pos = c_rarg3; // destination position | |
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2445 #ifndef _WIN64 |
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2446 const Register length = c_rarg4; |
0 | 2447 #else |
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2448 const Address length(rsp, 6 * wordSize); // elements count is on stack on Win64 |
0 | 2449 #endif |
2450 | |
2451 { int modulus = CodeEntryAlignment; | |
2452 int target = modulus - 5; // 5 = sizeof jmp(L_failed) | |
2453 int advance = target - (__ offset() % modulus); | |
2454 if (advance < 0) advance += modulus; | |
2455 if (advance > 0) __ nop(advance); | |
2456 } | |
2457 StubCodeMark mark(this, "StubRoutines", name); | |
2458 | |
2459 // Short-hop target to L_failed. Makes for denser prologue code. | |
2460 __ BIND(L_failed_0); | |
2461 __ jmp(L_failed); | |
2462 assert(__ offset() % CodeEntryAlignment == 0, "no further alignment needed"); | |
2463 | |
2464 __ align(CodeEntryAlignment); | |
2465 address start = __ pc(); | |
2466 | |
2467 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
2468 | |
2469 // bump this on entry, not on exit: | |
2470 inc_counter_np(SharedRuntime::_generic_array_copy_ctr); | |
2471 | |
2472 //----------------------------------------------------------------------- | |
2473 // Assembler stub will be used for this call to arraycopy | |
2474 // if the following conditions are met: | |
2475 // | |
2476 // (1) src and dst must not be null. | |
2477 // (2) src_pos must not be negative. | |
2478 // (3) dst_pos must not be negative. | |
2479 // (4) length must not be negative. | |
2480 // (5) src klass and dst klass should be the same and not NULL. | |
2481 // (6) src and dst should be arrays. | |
2482 // (7) src_pos + length must not exceed length of src. | |
2483 // (8) dst_pos + length must not exceed length of dst. | |
2484 // | |
2485 | |
2486 // if (src == NULL) return -1; | |
304 | 2487 __ testptr(src, src); // src oop |
0 | 2488 size_t j1off = __ offset(); |
2489 __ jccb(Assembler::zero, L_failed_0); | |
2490 | |
2491 // if (src_pos < 0) return -1; | |
2492 __ testl(src_pos, src_pos); // src_pos (32-bits) | |
2493 __ jccb(Assembler::negative, L_failed_0); | |
2494 | |
2495 // if (dst == NULL) return -1; | |
304 | 2496 __ testptr(dst, dst); // dst oop |
0 | 2497 __ jccb(Assembler::zero, L_failed_0); |
2498 | |
2499 // if (dst_pos < 0) return -1; | |
2500 __ testl(dst_pos, dst_pos); // dst_pos (32-bits) | |
2501 size_t j4off = __ offset(); | |
2502 __ jccb(Assembler::negative, L_failed_0); | |
2503 | |
2504 // The first four tests are very dense code, | |
2505 // but not quite dense enough to put four | |
2506 // jumps in a 16-byte instruction fetch buffer. | |
2507 // That's good, because some branch predicters | |
2508 // do not like jumps so close together. | |
2509 // Make sure of this. | |
2510 guarantee(((j1off ^ j4off) & ~15) != 0, "I$ line of 1st & 4th jumps"); | |
2511 | |
2512 // registers used as temp | |
2513 const Register r11_length = r11; // elements count to copy | |
2514 const Register r10_src_klass = r10; // array klass | |
2515 | |
2516 // if (length < 0) return -1; | |
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2517 __ movl(r11_length, length); // length (elements count, 32-bits value) |
0 | 2518 __ testl(r11_length, r11_length); |
2519 __ jccb(Assembler::negative, L_failed_0); | |
2520 | |
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2521 __ load_klass(r10_src_klass, src); |
0 | 2522 #ifdef ASSERT |
2523 // assert(src->klass() != NULL); | |
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2524 { |
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2525 BLOCK_COMMENT("assert klasses not null {"); |
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2526 Label L1, L2; |
304 | 2527 __ testptr(r10_src_klass, r10_src_klass); |
0 | 2528 __ jcc(Assembler::notZero, L2); // it is broken if klass is NULL |
2529 __ bind(L1); | |
2530 __ stop("broken null klass"); | |
2531 __ bind(L2); | |
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2532 __ load_klass(rax, dst); |
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2533 __ cmpq(rax, 0); |
0 | 2534 __ jcc(Assembler::equal, L1); // this would be broken also |
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2535 BLOCK_COMMENT("} assert klasses not null done"); |
0 | 2536 } |
2537 #endif | |
2538 | |
2539 // Load layout helper (32-bits) | |
2540 // | |
2541 // |array_tag| | header_size | element_type | |log2_element_size| | |
2542 // 32 30 24 16 8 2 0 | |
2543 // | |
2544 // array_tag: typeArray = 0x3, objArray = 0x2, non-array = 0x0 | |
2545 // | |
2546 | |
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2547 const int lh_offset = klassOopDesc::header_size() * HeapWordSize + |
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2548 Klass::layout_helper_offset_in_bytes(); |
0 | 2549 |
2550 // Handle objArrays completely differently... | |
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2551 const jint objArray_lh = Klass::array_layout_helper(T_OBJECT); |
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2552 __ cmpl(Address(r10_src_klass, lh_offset), objArray_lh); |
0 | 2553 __ jcc(Assembler::equal, L_objArray); |
2554 | |
2555 // if (src->klass() != dst->klass()) return -1; | |
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2556 __ load_klass(rax, dst); |
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2557 __ cmpq(r10_src_klass, rax); |
0 | 2558 __ jcc(Assembler::notEqual, L_failed); |
2559 | |
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2560 const Register rax_lh = rax; // layout helper |
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2561 __ movl(rax_lh, Address(r10_src_klass, lh_offset)); |
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2562 |
0 | 2563 // if (!src->is_Array()) return -1; |
2564 __ cmpl(rax_lh, Klass::_lh_neutral_value); | |
2565 __ jcc(Assembler::greaterEqual, L_failed); | |
2566 | |
2567 // At this point, it is known to be a typeArray (array_tag 0x3). | |
2568 #ifdef ASSERT | |
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2569 { |
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2570 BLOCK_COMMENT("assert primitive array {"); |
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2571 Label L; |
0 | 2572 __ cmpl(rax_lh, (Klass::_lh_array_tag_type_value << Klass::_lh_array_tag_shift)); |
2573 __ jcc(Assembler::greaterEqual, L); | |
2574 __ stop("must be a primitive array"); | |
2575 __ bind(L); | |
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2576 BLOCK_COMMENT("} assert primitive array done"); |
0 | 2577 } |
2578 #endif | |
2579 | |
2580 arraycopy_range_checks(src, src_pos, dst, dst_pos, r11_length, | |
2581 r10, L_failed); | |
2582 | |
2583 // typeArrayKlass | |
2584 // | |
2585 // src_addr = (src + array_header_in_bytes()) + (src_pos << log2elemsize); | |
2586 // dst_addr = (dst + array_header_in_bytes()) + (dst_pos << log2elemsize); | |
2587 // | |
2588 | |
2589 const Register r10_offset = r10; // array offset | |
2590 const Register rax_elsize = rax_lh; // element size | |
2591 | |
2592 __ movl(r10_offset, rax_lh); | |
2593 __ shrl(r10_offset, Klass::_lh_header_size_shift); | |
304 | 2594 __ andptr(r10_offset, Klass::_lh_header_size_mask); // array_offset |
2595 __ addptr(src, r10_offset); // src array offset | |
2596 __ addptr(dst, r10_offset); // dst array offset | |
0 | 2597 BLOCK_COMMENT("choose copy loop based on element size"); |
2598 __ andl(rax_lh, Klass::_lh_log2_element_size_mask); // rax_lh -> rax_elsize | |
2599 | |
2600 // next registers should be set before the jump to corresponding stub | |
2601 const Register from = c_rarg0; // source array address | |
2602 const Register to = c_rarg1; // destination array address | |
2603 const Register count = c_rarg2; // elements count | |
2604 | |
2605 // 'from', 'to', 'count' registers should be set in such order | |
2606 // since they are the same as 'src', 'src_pos', 'dst'. | |
2607 | |
2608 __ BIND(L_copy_bytes); | |
2609 __ cmpl(rax_elsize, 0); | |
2610 __ jccb(Assembler::notEqual, L_copy_shorts); | |
304 | 2611 __ lea(from, Address(src, src_pos, Address::times_1, 0));// src_addr |
2612 __ lea(to, Address(dst, dst_pos, Address::times_1, 0));// dst_addr | |
2613 __ movl2ptr(count, r11_length); // length | |
0 | 2614 __ jump(RuntimeAddress(byte_copy_entry)); |
2615 | |
2616 __ BIND(L_copy_shorts); | |
2617 __ cmpl(rax_elsize, LogBytesPerShort); | |
2618 __ jccb(Assembler::notEqual, L_copy_ints); | |
304 | 2619 __ lea(from, Address(src, src_pos, Address::times_2, 0));// src_addr |
2620 __ lea(to, Address(dst, dst_pos, Address::times_2, 0));// dst_addr | |
2621 __ movl2ptr(count, r11_length); // length | |
0 | 2622 __ jump(RuntimeAddress(short_copy_entry)); |
2623 | |
2624 __ BIND(L_copy_ints); | |
2625 __ cmpl(rax_elsize, LogBytesPerInt); | |
2626 __ jccb(Assembler::notEqual, L_copy_longs); | |
304 | 2627 __ lea(from, Address(src, src_pos, Address::times_4, 0));// src_addr |
2628 __ lea(to, Address(dst, dst_pos, Address::times_4, 0));// dst_addr | |
2629 __ movl2ptr(count, r11_length); // length | |
0 | 2630 __ jump(RuntimeAddress(int_copy_entry)); |
2631 | |
2632 __ BIND(L_copy_longs); | |
2633 #ifdef ASSERT | |
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2634 { |
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2635 BLOCK_COMMENT("assert long copy {"); |
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2636 Label L; |
0 | 2637 __ cmpl(rax_elsize, LogBytesPerLong); |
2638 __ jcc(Assembler::equal, L); | |
2639 __ stop("must be long copy, but elsize is wrong"); | |
2640 __ bind(L); | |
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2641 BLOCK_COMMENT("} assert long copy done"); |
0 | 2642 } |
2643 #endif | |
304 | 2644 __ lea(from, Address(src, src_pos, Address::times_8, 0));// src_addr |
2645 __ lea(to, Address(dst, dst_pos, Address::times_8, 0));// dst_addr | |
2646 __ movl2ptr(count, r11_length); // length | |
0 | 2647 __ jump(RuntimeAddress(long_copy_entry)); |
2648 | |
2649 // objArrayKlass | |
2650 __ BIND(L_objArray); | |
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2651 // live at this point: r10_src_klass, r11_length, src[_pos], dst[_pos] |
0 | 2652 |
2653 Label L_plain_copy, L_checkcast_copy; | |
2654 // test array classes for subtyping | |
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2655 __ load_klass(rax, dst); |
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2656 __ cmpq(r10_src_klass, rax); // usual case is exact equality |
0 | 2657 __ jcc(Assembler::notEqual, L_checkcast_copy); |
2658 | |
2659 // Identically typed arrays can be copied without element-wise checks. | |
2660 arraycopy_range_checks(src, src_pos, dst, dst_pos, r11_length, | |
2661 r10, L_failed); | |
2662 | |
304 | 2663 __ lea(from, Address(src, src_pos, TIMES_OOP, |
0 | 2664 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); // src_addr |
304 | 2665 __ lea(to, Address(dst, dst_pos, TIMES_OOP, |
2666 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); // dst_addr | |
2667 __ movl2ptr(count, r11_length); // length | |
0 | 2668 __ BIND(L_plain_copy); |
2669 __ jump(RuntimeAddress(oop_copy_entry)); | |
2670 | |
2671 __ BIND(L_checkcast_copy); | |
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2672 // live at this point: r10_src_klass, r11_length, rax (dst_klass) |
0 | 2673 { |
2674 // Before looking at dst.length, make sure dst is also an objArray. | |
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2675 __ cmpl(Address(rax, lh_offset), objArray_lh); |
0 | 2676 __ jcc(Assembler::notEqual, L_failed); |
2677 | |
2678 // It is safe to examine both src.length and dst.length. | |
2679 arraycopy_range_checks(src, src_pos, dst, dst_pos, r11_length, | |
2680 rax, L_failed); | |
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2681 |
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2682 const Register r11_dst_klass = r11; |
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2683 __ load_klass(r11_dst_klass, dst); // reload |
0 | 2684 |
2685 // Marshal the base address arguments now, freeing registers. | |
304 | 2686 __ lea(from, Address(src, src_pos, TIMES_OOP, |
0 | 2687 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); |
304 | 2688 __ lea(to, Address(dst, dst_pos, TIMES_OOP, |
0 | 2689 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); |
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2690 __ movl(count, length); // length (reloaded) |
0 | 2691 Register sco_temp = c_rarg3; // this register is free now |
2692 assert_different_registers(from, to, count, sco_temp, | |
2693 r11_dst_klass, r10_src_klass); | |
2694 assert_clean_int(count, sco_temp); | |
2695 | |
2696 // Generate the type check. | |
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2697 const int sco_offset = (klassOopDesc::header_size() * HeapWordSize + |
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2698 Klass::super_check_offset_offset_in_bytes()); |
0 | 2699 __ movl(sco_temp, Address(r11_dst_klass, sco_offset)); |
2700 assert_clean_int(sco_temp, rax); | |
2701 generate_type_check(r10_src_klass, sco_temp, r11_dst_klass, L_plain_copy); | |
2702 | |
2703 // Fetch destination element klass from the objArrayKlass header. | |
2704 int ek_offset = (klassOopDesc::header_size() * HeapWordSize + | |
2705 objArrayKlass::element_klass_offset_in_bytes()); | |
304 | 2706 __ movptr(r11_dst_klass, Address(r11_dst_klass, ek_offset)); |
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2707 __ movl( sco_temp, Address(r11_dst_klass, sco_offset)); |
0 | 2708 assert_clean_int(sco_temp, rax); |
2709 | |
2710 // the checkcast_copy loop needs two extra arguments: | |
2711 assert(c_rarg3 == sco_temp, "#3 already in place"); | |
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2712 // Set up arguments for checkcast_copy_entry. |
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2713 setup_arg_regs(4); |
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2714 __ movptr(r8, r11_dst_klass); // dst.klass.element_klass, r8 is c_rarg4 on Linux/Solaris |
0 | 2715 __ jump(RuntimeAddress(checkcast_copy_entry)); |
2716 } | |
2717 | |
2718 __ BIND(L_failed); | |
304 | 2719 __ xorptr(rax, rax); |
2720 __ notptr(rax); // return -1 | |
0 | 2721 __ leave(); // required for proper stackwalking of RuntimeStub frame |
2722 __ ret(0); | |
2723 | |
2724 return start; | |
2725 } | |
2726 | |
2727 void generate_arraycopy_stubs() { | |
2728 // Call the conjoint generation methods immediately after | |
2729 // the disjoint ones so that short branches from the former | |
2730 // to the latter can be generated. | |
2731 StubRoutines::_jbyte_disjoint_arraycopy = generate_disjoint_byte_copy(false, "jbyte_disjoint_arraycopy"); | |
2732 StubRoutines::_jbyte_arraycopy = generate_conjoint_byte_copy(false, "jbyte_arraycopy"); | |
2733 | |
2734 StubRoutines::_jshort_disjoint_arraycopy = generate_disjoint_short_copy(false, "jshort_disjoint_arraycopy"); | |
2735 StubRoutines::_jshort_arraycopy = generate_conjoint_short_copy(false, "jshort_arraycopy"); | |
2736 | |
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2737 StubRoutines::_jint_disjoint_arraycopy = generate_disjoint_int_oop_copy(false, false, "jint_disjoint_arraycopy"); |
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2738 StubRoutines::_jint_arraycopy = generate_conjoint_int_oop_copy(false, false, "jint_arraycopy"); |
0 | 2739 |
2740 StubRoutines::_jlong_disjoint_arraycopy = generate_disjoint_long_oop_copy(false, false, "jlong_disjoint_arraycopy"); | |
2741 StubRoutines::_jlong_arraycopy = generate_conjoint_long_oop_copy(false, false, "jlong_arraycopy"); | |
2742 | |
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2743 |
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2744 if (UseCompressedOops) { |
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2745 StubRoutines::_oop_disjoint_arraycopy = generate_disjoint_int_oop_copy(false, true, "oop_disjoint_arraycopy"); |
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2746 StubRoutines::_oop_arraycopy = generate_conjoint_int_oop_copy(false, true, "oop_arraycopy"); |
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2747 } else { |
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2748 StubRoutines::_oop_disjoint_arraycopy = generate_disjoint_long_oop_copy(false, true, "oop_disjoint_arraycopy"); |
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2749 StubRoutines::_oop_arraycopy = generate_conjoint_long_oop_copy(false, true, "oop_arraycopy"); |
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2750 } |
0 | 2751 |
2752 StubRoutines::_checkcast_arraycopy = generate_checkcast_copy("checkcast_arraycopy"); | |
2753 StubRoutines::_unsafe_arraycopy = generate_unsafe_copy("unsafe_arraycopy"); | |
2754 StubRoutines::_generic_arraycopy = generate_generic_copy("generic_arraycopy"); | |
2755 | |
1763 | 2756 StubRoutines::_jbyte_fill = generate_fill(T_BYTE, false, "jbyte_fill"); |
2757 StubRoutines::_jshort_fill = generate_fill(T_SHORT, false, "jshort_fill"); | |
2758 StubRoutines::_jint_fill = generate_fill(T_INT, false, "jint_fill"); | |
2759 StubRoutines::_arrayof_jbyte_fill = generate_fill(T_BYTE, true, "arrayof_jbyte_fill"); | |
2760 StubRoutines::_arrayof_jshort_fill = generate_fill(T_SHORT, true, "arrayof_jshort_fill"); | |
2761 StubRoutines::_arrayof_jint_fill = generate_fill(T_INT, true, "arrayof_jint_fill"); | |
2762 | |
0 | 2763 // We don't generate specialized code for HeapWord-aligned source |
2764 // arrays, so just use the code we've already generated | |
2765 StubRoutines::_arrayof_jbyte_disjoint_arraycopy = StubRoutines::_jbyte_disjoint_arraycopy; | |
2766 StubRoutines::_arrayof_jbyte_arraycopy = StubRoutines::_jbyte_arraycopy; | |
2767 | |
2768 StubRoutines::_arrayof_jshort_disjoint_arraycopy = StubRoutines::_jshort_disjoint_arraycopy; | |
2769 StubRoutines::_arrayof_jshort_arraycopy = StubRoutines::_jshort_arraycopy; | |
2770 | |
2771 StubRoutines::_arrayof_jint_disjoint_arraycopy = StubRoutines::_jint_disjoint_arraycopy; | |
2772 StubRoutines::_arrayof_jint_arraycopy = StubRoutines::_jint_arraycopy; | |
2773 | |
2774 StubRoutines::_arrayof_jlong_disjoint_arraycopy = StubRoutines::_jlong_disjoint_arraycopy; | |
2775 StubRoutines::_arrayof_jlong_arraycopy = StubRoutines::_jlong_arraycopy; | |
2776 | |
2777 StubRoutines::_arrayof_oop_disjoint_arraycopy = StubRoutines::_oop_disjoint_arraycopy; | |
2778 StubRoutines::_arrayof_oop_arraycopy = StubRoutines::_oop_arraycopy; | |
2779 } | |
2780 | |
1174
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2781 void generate_math_stubs() { |
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2782 { |
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2783 StubCodeMark mark(this, "StubRoutines", "log"); |
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2784 StubRoutines::_intrinsic_log = (double (*)(double)) __ pc(); |
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2785 |
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2786 __ subq(rsp, 8); |
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2787 __ movdbl(Address(rsp, 0), xmm0); |
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2788 __ fld_d(Address(rsp, 0)); |
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2789 __ flog(); |
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2790 __ fstp_d(Address(rsp, 0)); |
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2791 __ movdbl(xmm0, Address(rsp, 0)); |
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|
2792 __ addq(rsp, 8); |
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2793 __ ret(0); |
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2794 } |
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2795 { |
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2796 StubCodeMark mark(this, "StubRoutines", "log10"); |
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2797 StubRoutines::_intrinsic_log10 = (double (*)(double)) __ pc(); |
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|
2798 |
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2799 __ subq(rsp, 8); |
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2800 __ movdbl(Address(rsp, 0), xmm0); |
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2801 __ fld_d(Address(rsp, 0)); |
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2802 __ flog10(); |
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2803 __ fstp_d(Address(rsp, 0)); |
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2804 __ movdbl(xmm0, Address(rsp, 0)); |
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2805 __ addq(rsp, 8); |
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2806 __ ret(0); |
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2807 } |
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2808 { |
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2809 StubCodeMark mark(this, "StubRoutines", "sin"); |
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2810 StubRoutines::_intrinsic_sin = (double (*)(double)) __ pc(); |
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|
2811 |
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2812 __ subq(rsp, 8); |
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2813 __ movdbl(Address(rsp, 0), xmm0); |
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2814 __ fld_d(Address(rsp, 0)); |
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2815 __ trigfunc('s'); |
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2816 __ fstp_d(Address(rsp, 0)); |
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2817 __ movdbl(xmm0, Address(rsp, 0)); |
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2818 __ addq(rsp, 8); |
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2819 __ ret(0); |
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2820 } |
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2821 { |
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2822 StubCodeMark mark(this, "StubRoutines", "cos"); |
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2823 StubRoutines::_intrinsic_cos = (double (*)(double)) __ pc(); |
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2824 |
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2825 __ subq(rsp, 8); |
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2826 __ movdbl(Address(rsp, 0), xmm0); |
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2827 __ fld_d(Address(rsp, 0)); |
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2828 __ trigfunc('c'); |
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2829 __ fstp_d(Address(rsp, 0)); |
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2830 __ movdbl(xmm0, Address(rsp, 0)); |
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2831 __ addq(rsp, 8); |
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2832 __ ret(0); |
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2833 } |
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2834 { |
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2835 StubCodeMark mark(this, "StubRoutines", "tan"); |
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2836 StubRoutines::_intrinsic_tan = (double (*)(double)) __ pc(); |
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2837 |
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2838 __ subq(rsp, 8); |
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2839 __ movdbl(Address(rsp, 0), xmm0); |
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2840 __ fld_d(Address(rsp, 0)); |
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2841 __ trigfunc('t'); |
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2842 __ fstp_d(Address(rsp, 0)); |
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2843 __ movdbl(xmm0, Address(rsp, 0)); |
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2844 __ addq(rsp, 8); |
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2845 __ ret(0); |
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2846 } |
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2847 |
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2848 // The intrinsic version of these seem to return the same value as |
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2849 // the strict version. |
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2850 StubRoutines::_intrinsic_exp = SharedRuntime::dexp; |
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2851 StubRoutines::_intrinsic_pow = SharedRuntime::dpow; |
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2852 } |
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2853 |
0 | 2854 #undef __ |
2855 #define __ masm-> | |
2856 | |
2857 // Continuation point for throwing of implicit exceptions that are | |
2858 // not handled in the current activation. Fabricates an exception | |
2859 // oop and initiates normal exception dispatching in this | |
2860 // frame. Since we need to preserve callee-saved values (currently | |
2861 // only for C2, but done for C1 as well) we need a callee-saved oop | |
2862 // map and therefore have to make these stubs into RuntimeStubs | |
2863 // rather than BufferBlobs. If the compiler needs all registers to | |
2864 // be preserved between the fault point and the exception handler | |
2865 // then it must assume responsibility for that in | |
2866 // AbstractCompiler::continuation_for_implicit_null_exception or | |
2867 // continuation_for_implicit_division_by_zero_exception. All other | |
2868 // implicit exceptions (e.g., NullPointerException or | |
2869 // AbstractMethodError on entry) are either at call sites or | |
2870 // otherwise assume that stack unwinding will be initiated, so | |
2871 // caller saved registers were assumed volatile in the compiler. | |
2872 address generate_throw_exception(const char* name, | |
2873 address runtime_entry, | |
2874 bool restore_saved_exception_pc) { | |
2875 // Information about frame layout at time of blocking runtime call. | |
2876 // Note that we only have to preserve callee-saved registers since | |
2877 // the compilers are responsible for supplying a continuation point | |
2878 // if they expect all registers to be preserved. | |
2879 enum layout { | |
2880 rbp_off = frame::arg_reg_save_area_bytes/BytesPerInt, | |
2881 rbp_off2, | |
2882 return_off, | |
2883 return_off2, | |
2884 framesize // inclusive of return address | |
2885 }; | |
2886 | |
2887 int insts_size = 512; | |
2888 int locs_size = 64; | |
2889 | |
2890 CodeBuffer code(name, insts_size, locs_size); | |
2891 OopMapSet* oop_maps = new OopMapSet(); | |
2892 MacroAssembler* masm = new MacroAssembler(&code); | |
2893 | |
2894 address start = __ pc(); | |
2895 | |
2896 // This is an inlined and slightly modified version of call_VM | |
2897 // which has the ability to fetch the return PC out of | |
2898 // thread-local storage and also sets up last_Java_sp slightly | |
2899 // differently than the real call_VM | |
2900 if (restore_saved_exception_pc) { | |
304 | 2901 __ movptr(rax, |
2902 Address(r15_thread, | |
2903 in_bytes(JavaThread::saved_exception_pc_offset()))); | |
2904 __ push(rax); | |
0 | 2905 } |
2906 | |
2907 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
2908 | |
2909 assert(is_even(framesize/2), "sp not 16-byte aligned"); | |
2910 | |
2911 // return address and rbp are already in place | |
304 | 2912 __ subptr(rsp, (framesize-4) << LogBytesPerInt); // prolog |
0 | 2913 |
2914 int frame_complete = __ pc() - start; | |
2915 | |
2916 // Set up last_Java_sp and last_Java_fp | |
2917 __ set_last_Java_frame(rsp, rbp, NULL); | |
2918 | |
2919 // Call runtime | |
304 | 2920 __ movptr(c_rarg0, r15_thread); |
0 | 2921 BLOCK_COMMENT("call runtime_entry"); |
2922 __ call(RuntimeAddress(runtime_entry)); | |
2923 | |
2924 // Generate oop map | |
2925 OopMap* map = new OopMap(framesize, 0); | |
2926 | |
2927 oop_maps->add_gc_map(__ pc() - start, map); | |
2928 | |
2929 __ reset_last_Java_frame(true, false); | |
2930 | |
2931 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
2932 | |
2933 // check for pending exceptions | |
2934 #ifdef ASSERT | |
2935 Label L; | |
304 | 2936 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), |
2937 (int32_t) NULL_WORD); | |
0 | 2938 __ jcc(Assembler::notEqual, L); |
2939 __ should_not_reach_here(); | |
2940 __ bind(L); | |
2941 #endif // ASSERT | |
2942 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
2943 | |
2944 | |
2945 // codeBlob framesize is in words (not VMRegImpl::slot_size) | |
2946 RuntimeStub* stub = | |
2947 RuntimeStub::new_runtime_stub(name, | |
2948 &code, | |
2949 frame_complete, | |
2950 (framesize >> (LogBytesPerWord - LogBytesPerInt)), | |
2951 oop_maps, false); | |
2952 return stub->entry_point(); | |
2953 } | |
2954 | |
2955 // Initialization | |
2956 void generate_initial() { | |
2957 // Generates all stubs and initializes the entry points | |
2958 | |
2959 // This platform-specific stub is needed by generate_call_stub() | |
304 | 2960 StubRoutines::x86::_mxcsr_std = generate_fp_mask("mxcsr_std", 0x0000000000001F80); |
0 | 2961 |
2962 // entry points that exist in all platforms Note: This is code | |
2963 // that could be shared among different platforms - however the | |
2964 // benefit seems to be smaller than the disadvantage of having a | |
2965 // much more complicated generator structure. See also comment in | |
2966 // stubRoutines.hpp. | |
2967 | |
2968 StubRoutines::_forward_exception_entry = generate_forward_exception(); | |
2969 | |
2970 StubRoutines::_call_stub_entry = | |
2971 generate_call_stub(StubRoutines::_call_stub_return_address); | |
2972 | |
2973 // is referenced by megamorphic call | |
2974 StubRoutines::_catch_exception_entry = generate_catch_exception(); | |
2975 | |
2976 // atomic calls | |
2977 StubRoutines::_atomic_xchg_entry = generate_atomic_xchg(); | |
2978 StubRoutines::_atomic_xchg_ptr_entry = generate_atomic_xchg_ptr(); | |
2979 StubRoutines::_atomic_cmpxchg_entry = generate_atomic_cmpxchg(); | |
2980 StubRoutines::_atomic_cmpxchg_long_entry = generate_atomic_cmpxchg_long(); | |
2981 StubRoutines::_atomic_add_entry = generate_atomic_add(); | |
2982 StubRoutines::_atomic_add_ptr_entry = generate_atomic_add_ptr(); | |
2983 StubRoutines::_fence_entry = generate_orderaccess_fence(); | |
2984 | |
2985 StubRoutines::_handler_for_unsafe_access_entry = | |
2986 generate_handler_for_unsafe_access(); | |
2987 | |
2988 // platform dependent | |
304 | 2989 StubRoutines::x86::_get_previous_fp_entry = generate_get_previous_fp(); |
2990 | |
2991 StubRoutines::x86::_verify_mxcsr_entry = generate_verify_mxcsr(); | |
0 | 2992 } |
2993 | |
2994 void generate_all() { | |
2995 // Generates all stubs and initializes the entry points | |
2996 | |
2997 // These entry points require SharedInfo::stack0 to be set up in | |
2998 // non-core builds and need to be relocatable, so they each | |
2999 // fabricate a RuntimeStub internally. | |
3000 StubRoutines::_throw_AbstractMethodError_entry = | |
3001 generate_throw_exception("AbstractMethodError throw_exception", | |
3002 CAST_FROM_FN_PTR(address, | |
3003 SharedRuntime:: | |
3004 throw_AbstractMethodError), | |
3005 false); | |
3006 | |
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3007 StubRoutines::_throw_IncompatibleClassChangeError_entry = |
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3008 generate_throw_exception("IncompatibleClassChangeError throw_exception", |
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3009 CAST_FROM_FN_PTR(address, |
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3010 SharedRuntime:: |
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3011 throw_IncompatibleClassChangeError), |
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3012 false); |
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3013 |
0 | 3014 StubRoutines::_throw_ArithmeticException_entry = |
3015 generate_throw_exception("ArithmeticException throw_exception", | |
3016 CAST_FROM_FN_PTR(address, | |
3017 SharedRuntime:: | |
3018 throw_ArithmeticException), | |
3019 true); | |
3020 | |
3021 StubRoutines::_throw_NullPointerException_entry = | |
3022 generate_throw_exception("NullPointerException throw_exception", | |
3023 CAST_FROM_FN_PTR(address, | |
3024 SharedRuntime:: | |
3025 throw_NullPointerException), | |
3026 true); | |
3027 | |
3028 StubRoutines::_throw_NullPointerException_at_call_entry = | |
3029 generate_throw_exception("NullPointerException at call throw_exception", | |
3030 CAST_FROM_FN_PTR(address, | |
3031 SharedRuntime:: | |
3032 throw_NullPointerException_at_call), | |
3033 false); | |
3034 | |
3035 StubRoutines::_throw_StackOverflowError_entry = | |
3036 generate_throw_exception("StackOverflowError throw_exception", | |
3037 CAST_FROM_FN_PTR(address, | |
3038 SharedRuntime:: | |
3039 throw_StackOverflowError), | |
3040 false); | |
3041 | |
3042 // entry points that are platform specific | |
304 | 3043 StubRoutines::x86::_f2i_fixup = generate_f2i_fixup(); |
3044 StubRoutines::x86::_f2l_fixup = generate_f2l_fixup(); | |
3045 StubRoutines::x86::_d2i_fixup = generate_d2i_fixup(); | |
3046 StubRoutines::x86::_d2l_fixup = generate_d2l_fixup(); | |
3047 | |
3048 StubRoutines::x86::_float_sign_mask = generate_fp_mask("float_sign_mask", 0x7FFFFFFF7FFFFFFF); | |
3049 StubRoutines::x86::_float_sign_flip = generate_fp_mask("float_sign_flip", 0x8000000080000000); | |
3050 StubRoutines::x86::_double_sign_mask = generate_fp_mask("double_sign_mask", 0x7FFFFFFFFFFFFFFF); | |
3051 StubRoutines::x86::_double_sign_flip = generate_fp_mask("double_sign_flip", 0x8000000000000000); | |
0 | 3052 |
3053 // support for verify_oop (must happen after universe_init) | |
3054 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop(); | |
3055 | |
3056 // arraycopy stubs used by compilers | |
3057 generate_arraycopy_stubs(); | |
1108 | 3058 |
1174
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3059 generate_math_stubs(); |
0 | 3060 } |
3061 | |
3062 public: | |
3063 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) { | |
3064 if (all) { | |
3065 generate_all(); | |
3066 } else { | |
3067 generate_initial(); | |
3068 } | |
3069 } | |
3070 }; // end class declaration | |
3071 | |
3072 address StubGenerator::disjoint_byte_copy_entry = NULL; | |
3073 address StubGenerator::disjoint_short_copy_entry = NULL; | |
3074 address StubGenerator::disjoint_int_copy_entry = NULL; | |
3075 address StubGenerator::disjoint_long_copy_entry = NULL; | |
3076 address StubGenerator::disjoint_oop_copy_entry = NULL; | |
3077 | |
3078 address StubGenerator::byte_copy_entry = NULL; | |
3079 address StubGenerator::short_copy_entry = NULL; | |
3080 address StubGenerator::int_copy_entry = NULL; | |
3081 address StubGenerator::long_copy_entry = NULL; | |
3082 address StubGenerator::oop_copy_entry = NULL; | |
3083 | |
3084 address StubGenerator::checkcast_copy_entry = NULL; | |
3085 | |
3086 void StubGenerator_generate(CodeBuffer* code, bool all) { | |
3087 StubGenerator g(code, all); | |
3088 } |