Mercurial > hg > graal-compiler
annotate src/cpu/x86/vm/stubGenerator_x86_32.cpp @ 749:81a249214991
6829234: Refix 6822407 and 6812971
Summary: Fixes two SA issues 6822407 and 6812971
Reviewed-by: swamyv, acorn, kvn, coleenp
author | poonam |
---|---|
date | Mon, 04 May 2009 17:58:10 -0700 |
parents | e5b0439ef4ae |
children | df6caf649ff7 |
rev | line source |
---|---|
0 | 1 /* |
579 | 2 * Copyright 1999-2009 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_stubGenerator_x86_32.cpp.incl" | |
27 | |
28 // Declaration and definition of StubGenerator (no .hpp file). | |
29 // For a more detailed description of the stub routine structure | |
30 // see the comment in stubRoutines.hpp | |
31 | |
32 #define __ _masm-> | |
304 | 33 #define a__ ((Assembler*)_masm)-> |
0 | 34 |
35 #ifdef PRODUCT | |
36 #define BLOCK_COMMENT(str) /* nothing */ | |
37 #else | |
38 #define BLOCK_COMMENT(str) __ block_comment(str) | |
39 #endif | |
40 | |
41 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") | |
42 | |
43 const int MXCSR_MASK = 0xFFC0; // Mask out any pending exceptions | |
44 const int FPU_CNTRL_WRD_MASK = 0xFFFF; | |
45 | |
46 // ------------------------------------------------------------------------------------------------------------------------- | |
47 // Stub Code definitions | |
48 | |
49 static address handle_unsafe_access() { | |
50 JavaThread* thread = JavaThread::current(); | |
51 address pc = thread->saved_exception_pc(); | |
52 // pc is the instruction which we must emulate | |
53 // doing a no-op is fine: return garbage from the load | |
54 // therefore, compute npc | |
55 address npc = Assembler::locate_next_instruction(pc); | |
56 | |
57 // request an async exception | |
58 thread->set_pending_unsafe_access_error(); | |
59 | |
60 // return address of next instruction to execute | |
61 return npc; | |
62 } | |
63 | |
64 class StubGenerator: public StubCodeGenerator { | |
65 private: | |
66 | |
67 #ifdef PRODUCT | |
68 #define inc_counter_np(counter) (0) | |
69 #else | |
70 void inc_counter_np_(int& counter) { | |
304 | 71 __ incrementl(ExternalAddress((address)&counter)); |
0 | 72 } |
73 #define inc_counter_np(counter) \ | |
74 BLOCK_COMMENT("inc_counter " #counter); \ | |
75 inc_counter_np_(counter); | |
76 #endif //PRODUCT | |
77 | |
78 void inc_copy_counter_np(BasicType t) { | |
79 #ifndef PRODUCT | |
80 switch (t) { | |
81 case T_BYTE: inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr); return; | |
82 case T_SHORT: inc_counter_np(SharedRuntime::_jshort_array_copy_ctr); return; | |
83 case T_INT: inc_counter_np(SharedRuntime::_jint_array_copy_ctr); return; | |
84 case T_LONG: inc_counter_np(SharedRuntime::_jlong_array_copy_ctr); return; | |
85 case T_OBJECT: inc_counter_np(SharedRuntime::_oop_array_copy_ctr); return; | |
86 } | |
87 ShouldNotReachHere(); | |
88 #endif //PRODUCT | |
89 } | |
90 | |
91 //------------------------------------------------------------------------------------------------------------------------ | |
92 // Call stubs are used to call Java from C | |
93 // | |
94 // [ return_from_Java ] <--- rsp | |
95 // [ argument word n ] | |
96 // ... | |
97 // -N [ argument word 1 ] | |
98 // -7 [ Possible padding for stack alignment ] | |
99 // -6 [ Possible padding for stack alignment ] | |
100 // -5 [ Possible padding for stack alignment ] | |
101 // -4 [ mxcsr save ] <--- rsp_after_call | |
102 // -3 [ saved rbx, ] | |
103 // -2 [ saved rsi ] | |
104 // -1 [ saved rdi ] | |
105 // 0 [ saved rbp, ] <--- rbp, | |
106 // 1 [ return address ] | |
107 // 2 [ ptr. to call wrapper ] | |
108 // 3 [ result ] | |
109 // 4 [ result_type ] | |
110 // 5 [ method ] | |
111 // 6 [ entry_point ] | |
112 // 7 [ parameters ] | |
113 // 8 [ parameter_size ] | |
114 // 9 [ thread ] | |
115 | |
116 | |
117 address generate_call_stub(address& return_address) { | |
118 StubCodeMark mark(this, "StubRoutines", "call_stub"); | |
119 address start = __ pc(); | |
120 | |
121 // stub code parameters / addresses | |
122 assert(frame::entry_frame_call_wrapper_offset == 2, "adjust this code"); | |
123 bool sse_save = false; | |
124 const Address rsp_after_call(rbp, -4 * wordSize); // same as in generate_catch_exception()! | |
125 const int locals_count_in_bytes (4*wordSize); | |
126 const Address mxcsr_save (rbp, -4 * wordSize); | |
127 const Address saved_rbx (rbp, -3 * wordSize); | |
128 const Address saved_rsi (rbp, -2 * wordSize); | |
129 const Address saved_rdi (rbp, -1 * wordSize); | |
130 const Address result (rbp, 3 * wordSize); | |
131 const Address result_type (rbp, 4 * wordSize); | |
132 const Address method (rbp, 5 * wordSize); | |
133 const Address entry_point (rbp, 6 * wordSize); | |
134 const Address parameters (rbp, 7 * wordSize); | |
135 const Address parameter_size(rbp, 8 * wordSize); | |
136 const Address thread (rbp, 9 * wordSize); // same as in generate_catch_exception()! | |
137 sse_save = UseSSE > 0; | |
138 | |
139 // stub code | |
140 __ enter(); | |
304 | 141 __ movptr(rcx, parameter_size); // parameter counter |
142 __ shlptr(rcx, Interpreter::logStackElementSize()); // convert parameter count to bytes | |
143 __ addptr(rcx, locals_count_in_bytes); // reserve space for register saves | |
144 __ subptr(rsp, rcx); | |
145 __ andptr(rsp, -(StackAlignmentInBytes)); // Align stack | |
0 | 146 |
147 // save rdi, rsi, & rbx, according to C calling conventions | |
304 | 148 __ movptr(saved_rdi, rdi); |
149 __ movptr(saved_rsi, rsi); | |
150 __ movptr(saved_rbx, rbx); | |
0 | 151 // save and initialize %mxcsr |
152 if (sse_save) { | |
153 Label skip_ldmx; | |
154 __ stmxcsr(mxcsr_save); | |
155 __ movl(rax, mxcsr_save); | |
156 __ andl(rax, MXCSR_MASK); // Only check control and mask bits | |
157 ExternalAddress mxcsr_std(StubRoutines::addr_mxcsr_std()); | |
158 __ cmp32(rax, mxcsr_std); | |
159 __ jcc(Assembler::equal, skip_ldmx); | |
160 __ ldmxcsr(mxcsr_std); | |
161 __ bind(skip_ldmx); | |
162 } | |
163 | |
164 // make sure the control word is correct. | |
165 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); | |
166 | |
167 #ifdef ASSERT | |
168 // make sure we have no pending exceptions | |
169 { Label L; | |
304 | 170 __ movptr(rcx, thread); |
171 __ cmpptr(Address(rcx, Thread::pending_exception_offset()), (int32_t)NULL_WORD); | |
0 | 172 __ jcc(Assembler::equal, L); |
173 __ stop("StubRoutines::call_stub: entered with pending exception"); | |
174 __ bind(L); | |
175 } | |
176 #endif | |
177 | |
178 // pass parameters if any | |
179 BLOCK_COMMENT("pass parameters if any"); | |
180 Label parameters_done; | |
181 __ movl(rcx, parameter_size); // parameter counter | |
182 __ testl(rcx, rcx); | |
183 __ jcc(Assembler::zero, parameters_done); | |
184 | |
185 // parameter passing loop | |
186 | |
187 Label loop; | |
188 // Copy Java parameters in reverse order (receiver last) | |
189 // Note that the argument order is inverted in the process | |
190 // source is rdx[rcx: N-1..0] | |
191 // dest is rsp[rbx: 0..N-1] | |
192 | |
304 | 193 __ movptr(rdx, parameters); // parameter pointer |
194 __ xorptr(rbx, rbx); | |
0 | 195 |
196 __ BIND(loop); | |
197 if (TaggedStackInterpreter) { | |
304 | 198 __ movptr(rax, Address(rdx, rcx, Interpreter::stackElementScale(), |
0 | 199 -2*wordSize)); // get tag |
304 | 200 __ movptr(Address(rsp, rbx, Interpreter::stackElementScale(), |
0 | 201 Interpreter::expr_tag_offset_in_bytes(0)), rax); // store tag |
202 } | |
203 | |
204 // get parameter | |
304 | 205 __ movptr(rax, Address(rdx, rcx, Interpreter::stackElementScale(), -wordSize)); |
206 __ movptr(Address(rsp, rbx, Interpreter::stackElementScale(), | |
0 | 207 Interpreter::expr_offset_in_bytes(0)), rax); // store parameter |
208 __ increment(rbx); | |
209 __ decrement(rcx); | |
210 __ jcc(Assembler::notZero, loop); | |
211 | |
212 // call Java function | |
213 __ BIND(parameters_done); | |
304 | 214 __ movptr(rbx, method); // get methodOop |
215 __ movptr(rax, entry_point); // get entry_point | |
216 __ mov(rsi, rsp); // set sender sp | |
0 | 217 BLOCK_COMMENT("call Java function"); |
218 __ call(rax); | |
219 | |
220 BLOCK_COMMENT("call_stub_return_address:"); | |
221 return_address = __ pc(); | |
222 | |
223 Label common_return; | |
224 | |
225 __ BIND(common_return); | |
226 | |
227 // store result depending on type | |
228 // (everything that is not T_LONG, T_FLOAT or T_DOUBLE is treated as T_INT) | |
304 | 229 __ movptr(rdi, result); |
0 | 230 Label is_long, is_float, is_double, exit; |
231 __ movl(rsi, result_type); | |
232 __ cmpl(rsi, T_LONG); | |
233 __ jcc(Assembler::equal, is_long); | |
234 __ cmpl(rsi, T_FLOAT); | |
235 __ jcc(Assembler::equal, is_float); | |
236 __ cmpl(rsi, T_DOUBLE); | |
237 __ jcc(Assembler::equal, is_double); | |
238 | |
239 // handle T_INT case | |
240 __ movl(Address(rdi, 0), rax); | |
241 __ BIND(exit); | |
242 | |
243 // check that FPU stack is empty | |
244 __ verify_FPU(0, "generate_call_stub"); | |
245 | |
246 // pop parameters | |
304 | 247 __ lea(rsp, rsp_after_call); |
0 | 248 |
249 // restore %mxcsr | |
250 if (sse_save) { | |
251 __ ldmxcsr(mxcsr_save); | |
252 } | |
253 | |
254 // restore rdi, rsi and rbx, | |
304 | 255 __ movptr(rbx, saved_rbx); |
256 __ movptr(rsi, saved_rsi); | |
257 __ movptr(rdi, saved_rdi); | |
258 __ addptr(rsp, 4*wordSize); | |
0 | 259 |
260 // return | |
304 | 261 __ pop(rbp); |
0 | 262 __ ret(0); |
263 | |
264 // handle return types different from T_INT | |
265 __ BIND(is_long); | |
266 __ movl(Address(rdi, 0 * wordSize), rax); | |
267 __ movl(Address(rdi, 1 * wordSize), rdx); | |
268 __ jmp(exit); | |
269 | |
270 __ BIND(is_float); | |
271 // interpreter uses xmm0 for return values | |
272 if (UseSSE >= 1) { | |
273 __ movflt(Address(rdi, 0), xmm0); | |
274 } else { | |
275 __ fstp_s(Address(rdi, 0)); | |
276 } | |
277 __ jmp(exit); | |
278 | |
279 __ BIND(is_double); | |
280 // interpreter uses xmm0 for return values | |
281 if (UseSSE >= 2) { | |
282 __ movdbl(Address(rdi, 0), xmm0); | |
283 } else { | |
284 __ fstp_d(Address(rdi, 0)); | |
285 } | |
286 __ jmp(exit); | |
287 | |
288 // If we call compiled code directly from the call stub we will | |
289 // need to adjust the return back to the call stub to a specialized | |
290 // piece of code that can handle compiled results and cleaning the fpu | |
291 // stack. compiled code will be set to return here instead of the | |
292 // return above that handles interpreter returns. | |
293 | |
294 BLOCK_COMMENT("call_stub_compiled_return:"); | |
304 | 295 StubRoutines::x86::set_call_stub_compiled_return( __ pc()); |
0 | 296 |
297 #ifdef COMPILER2 | |
298 if (UseSSE >= 2) { | |
299 __ verify_FPU(0, "call_stub_compiled_return"); | |
300 } else { | |
301 for (int i = 1; i < 8; i++) { | |
302 __ ffree(i); | |
303 } | |
304 | |
305 // UseSSE <= 1 so double result should be left on TOS | |
306 __ movl(rsi, result_type); | |
307 __ cmpl(rsi, T_DOUBLE); | |
308 __ jcc(Assembler::equal, common_return); | |
309 if (UseSSE == 0) { | |
310 // UseSSE == 0 so float result should be left on TOS | |
311 __ cmpl(rsi, T_FLOAT); | |
312 __ jcc(Assembler::equal, common_return); | |
313 } | |
314 __ ffree(0); | |
315 } | |
316 #endif /* COMPILER2 */ | |
317 __ jmp(common_return); | |
318 | |
319 return start; | |
320 } | |
321 | |
322 | |
323 //------------------------------------------------------------------------------------------------------------------------ | |
324 // Return point for a Java call if there's an exception thrown in Java code. | |
325 // The exception is caught and transformed into a pending exception stored in | |
326 // JavaThread that can be tested from within the VM. | |
327 // | |
328 // Note: Usually the parameters are removed by the callee. In case of an exception | |
329 // crossing an activation frame boundary, that is not the case if the callee | |
330 // is compiled code => need to setup the rsp. | |
331 // | |
332 // rax,: exception oop | |
333 | |
334 address generate_catch_exception() { | |
335 StubCodeMark mark(this, "StubRoutines", "catch_exception"); | |
336 const Address rsp_after_call(rbp, -4 * wordSize); // same as in generate_call_stub()! | |
337 const Address thread (rbp, 9 * wordSize); // same as in generate_call_stub()! | |
338 address start = __ pc(); | |
339 | |
340 // get thread directly | |
304 | 341 __ movptr(rcx, thread); |
0 | 342 #ifdef ASSERT |
343 // verify that threads correspond | |
344 { Label L; | |
345 __ get_thread(rbx); | |
304 | 346 __ cmpptr(rbx, rcx); |
0 | 347 __ jcc(Assembler::equal, L); |
348 __ stop("StubRoutines::catch_exception: threads must correspond"); | |
349 __ bind(L); | |
350 } | |
351 #endif | |
352 // set pending exception | |
353 __ verify_oop(rax); | |
304 | 354 __ movptr(Address(rcx, Thread::pending_exception_offset()), rax ); |
0 | 355 __ lea(Address(rcx, Thread::exception_file_offset ()), |
356 ExternalAddress((address)__FILE__)); | |
357 __ movl(Address(rcx, Thread::exception_line_offset ()), __LINE__ ); | |
358 // complete return to VM | |
359 assert(StubRoutines::_call_stub_return_address != NULL, "_call_stub_return_address must have been generated before"); | |
360 __ jump(RuntimeAddress(StubRoutines::_call_stub_return_address)); | |
361 | |
362 return start; | |
363 } | |
364 | |
365 | |
366 //------------------------------------------------------------------------------------------------------------------------ | |
367 // Continuation point for runtime calls returning with a pending exception. | |
368 // The pending exception check happened in the runtime or native call stub. | |
369 // The pending exception in Thread is converted into a Java-level exception. | |
370 // | |
371 // Contract with Java-level exception handlers: | |
372 // rax,: exception | |
373 // rdx: throwing pc | |
374 // | |
375 // NOTE: At entry of this stub, exception-pc must be on stack !! | |
376 | |
377 address generate_forward_exception() { | |
378 StubCodeMark mark(this, "StubRoutines", "forward exception"); | |
379 address start = __ pc(); | |
380 | |
381 // Upon entry, the sp points to the return address returning into Java | |
382 // (interpreted or compiled) code; i.e., the return address becomes the | |
383 // throwing pc. | |
384 // | |
385 // Arguments pushed before the runtime call are still on the stack but | |
386 // the exception handler will reset the stack pointer -> ignore them. | |
387 // A potential result in registers can be ignored as well. | |
388 | |
389 #ifdef ASSERT | |
390 // make sure this code is only executed if there is a pending exception | |
391 { Label L; | |
392 __ get_thread(rcx); | |
304 | 393 __ cmpptr(Address(rcx, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 394 __ jcc(Assembler::notEqual, L); |
395 __ stop("StubRoutines::forward exception: no pending exception (1)"); | |
396 __ bind(L); | |
397 } | |
398 #endif | |
399 | |
400 // compute exception handler into rbx, | |
304 | 401 __ movptr(rax, Address(rsp, 0)); |
0 | 402 BLOCK_COMMENT("call exception_handler_for_return_address"); |
403 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), rax); | |
304 | 404 __ mov(rbx, rax); |
0 | 405 |
406 // setup rax, & rdx, remove return address & clear pending exception | |
407 __ get_thread(rcx); | |
304 | 408 __ pop(rdx); |
409 __ movptr(rax, Address(rcx, Thread::pending_exception_offset())); | |
533
dc3ad84615cf
6795913: A few remaining wrong casts need to be fixed for building hotspot successfully on Mac OS.
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parents:
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410 __ movptr(Address(rcx, Thread::pending_exception_offset()), NULL_WORD); |
0 | 411 |
412 #ifdef ASSERT | |
413 // make sure exception is set | |
414 { Label L; | |
304 | 415 __ testptr(rax, rax); |
0 | 416 __ jcc(Assembler::notEqual, L); |
417 __ stop("StubRoutines::forward exception: no pending exception (2)"); | |
418 __ bind(L); | |
419 } | |
420 #endif | |
421 | |
422 // continue at exception handler (return address removed) | |
423 // rax,: exception | |
424 // rbx,: exception handler | |
425 // rdx: throwing pc | |
426 __ verify_oop(rax); | |
427 __ jmp(rbx); | |
428 | |
429 return start; | |
430 } | |
431 | |
432 | |
433 //---------------------------------------------------------------------------------------------------- | |
434 // Support for jint Atomic::xchg(jint exchange_value, volatile jint* dest) | |
435 // | |
436 // xchg exists as far back as 8086, lock needed for MP only | |
437 // Stack layout immediately after call: | |
438 // | |
439 // 0 [ret addr ] <--- rsp | |
440 // 1 [ ex ] | |
441 // 2 [ dest ] | |
442 // | |
443 // Result: *dest <- ex, return (old *dest) | |
444 // | |
445 // Note: win32 does not currently use this code | |
446 | |
447 address generate_atomic_xchg() { | |
448 StubCodeMark mark(this, "StubRoutines", "atomic_xchg"); | |
449 address start = __ pc(); | |
450 | |
304 | 451 __ push(rdx); |
0 | 452 Address exchange(rsp, 2 * wordSize); |
453 Address dest_addr(rsp, 3 * wordSize); | |
454 __ movl(rax, exchange); | |
304 | 455 __ movptr(rdx, dest_addr); |
456 __ xchgl(rax, Address(rdx, 0)); | |
457 __ pop(rdx); | |
0 | 458 __ ret(0); |
459 | |
460 return start; | |
461 } | |
462 | |
463 //---------------------------------------------------------------------------------------------------- | |
464 // Support for void verify_mxcsr() | |
465 // | |
466 // This routine is used with -Xcheck:jni to verify that native | |
467 // JNI code does not return to Java code without restoring the | |
468 // MXCSR register to our expected state. | |
469 | |
470 | |
471 address generate_verify_mxcsr() { | |
472 StubCodeMark mark(this, "StubRoutines", "verify_mxcsr"); | |
473 address start = __ pc(); | |
474 | |
475 const Address mxcsr_save(rsp, 0); | |
476 | |
477 if (CheckJNICalls && UseSSE > 0 ) { | |
478 Label ok_ret; | |
479 ExternalAddress mxcsr_std(StubRoutines::addr_mxcsr_std()); | |
304 | 480 __ push(rax); |
481 __ subptr(rsp, wordSize); // allocate a temp location | |
0 | 482 __ stmxcsr(mxcsr_save); |
483 __ movl(rax, mxcsr_save); | |
484 __ andl(rax, MXCSR_MASK); | |
485 __ cmp32(rax, mxcsr_std); | |
486 __ jcc(Assembler::equal, ok_ret); | |
487 | |
488 __ warn("MXCSR changed by native JNI code."); | |
489 | |
490 __ ldmxcsr(mxcsr_std); | |
491 | |
492 __ bind(ok_ret); | |
304 | 493 __ addptr(rsp, wordSize); |
494 __ pop(rax); | |
0 | 495 } |
496 | |
497 __ ret(0); | |
498 | |
499 return start; | |
500 } | |
501 | |
502 | |
503 //--------------------------------------------------------------------------- | |
504 // Support for void verify_fpu_cntrl_wrd() | |
505 // | |
506 // This routine is used with -Xcheck:jni to verify that native | |
507 // JNI code does not return to Java code without restoring the | |
508 // FP control word to our expected state. | |
509 | |
510 address generate_verify_fpu_cntrl_wrd() { | |
511 StubCodeMark mark(this, "StubRoutines", "verify_spcw"); | |
512 address start = __ pc(); | |
513 | |
514 const Address fpu_cntrl_wrd_save(rsp, 0); | |
515 | |
516 if (CheckJNICalls) { | |
517 Label ok_ret; | |
304 | 518 __ push(rax); |
519 __ subptr(rsp, wordSize); // allocate a temp location | |
0 | 520 __ fnstcw(fpu_cntrl_wrd_save); |
521 __ movl(rax, fpu_cntrl_wrd_save); | |
522 __ andl(rax, FPU_CNTRL_WRD_MASK); | |
523 ExternalAddress fpu_std(StubRoutines::addr_fpu_cntrl_wrd_std()); | |
524 __ cmp32(rax, fpu_std); | |
525 __ jcc(Assembler::equal, ok_ret); | |
526 | |
527 __ warn("Floating point control word changed by native JNI code."); | |
528 | |
529 __ fldcw(fpu_std); | |
530 | |
531 __ bind(ok_ret); | |
304 | 532 __ addptr(rsp, wordSize); |
533 __ pop(rax); | |
0 | 534 } |
535 | |
536 __ ret(0); | |
537 | |
538 return start; | |
539 } | |
540 | |
541 //--------------------------------------------------------------------------- | |
542 // Wrapper for slow-case handling of double-to-integer conversion | |
543 // d2i or f2i fast case failed either because it is nan or because | |
544 // of under/overflow. | |
545 // Input: FPU TOS: float value | |
546 // Output: rax, (rdx): integer (long) result | |
547 | |
548 address generate_d2i_wrapper(BasicType t, address fcn) { | |
549 StubCodeMark mark(this, "StubRoutines", "d2i_wrapper"); | |
550 address start = __ pc(); | |
551 | |
552 // Capture info about frame layout | |
553 enum layout { FPUState_off = 0, | |
554 rbp_off = FPUStateSizeInWords, | |
555 rdi_off, | |
556 rsi_off, | |
557 rcx_off, | |
558 rbx_off, | |
559 saved_argument_off, | |
560 saved_argument_off2, // 2nd half of double | |
561 framesize | |
562 }; | |
563 | |
564 assert(FPUStateSizeInWords == 27, "update stack layout"); | |
565 | |
566 // Save outgoing argument to stack across push_FPU_state() | |
304 | 567 __ subptr(rsp, wordSize * 2); |
0 | 568 __ fstp_d(Address(rsp, 0)); |
569 | |
570 // Save CPU & FPU state | |
304 | 571 __ push(rbx); |
572 __ push(rcx); | |
573 __ push(rsi); | |
574 __ push(rdi); | |
575 __ push(rbp); | |
0 | 576 __ push_FPU_state(); |
577 | |
578 // push_FPU_state() resets the FP top of stack | |
579 // Load original double into FP top of stack | |
580 __ fld_d(Address(rsp, saved_argument_off * wordSize)); | |
581 // Store double into stack as outgoing argument | |
304 | 582 __ subptr(rsp, wordSize*2); |
0 | 583 __ fst_d(Address(rsp, 0)); |
584 | |
585 // Prepare FPU for doing math in C-land | |
586 __ empty_FPU_stack(); | |
587 // Call the C code to massage the double. Result in EAX | |
588 if (t == T_INT) | |
589 { BLOCK_COMMENT("SharedRuntime::d2i"); } | |
590 else if (t == T_LONG) | |
591 { BLOCK_COMMENT("SharedRuntime::d2l"); } | |
592 __ call_VM_leaf( fcn, 2 ); | |
593 | |
594 // Restore CPU & FPU state | |
595 __ pop_FPU_state(); | |
304 | 596 __ pop(rbp); |
597 __ pop(rdi); | |
598 __ pop(rsi); | |
599 __ pop(rcx); | |
600 __ pop(rbx); | |
601 __ addptr(rsp, wordSize * 2); | |
0 | 602 |
603 __ ret(0); | |
604 | |
605 return start; | |
606 } | |
607 | |
608 | |
609 //--------------------------------------------------------------------------- | |
610 // The following routine generates a subroutine to throw an asynchronous | |
611 // UnknownError when an unsafe access gets a fault that could not be | |
612 // reasonably prevented by the programmer. (Example: SIGBUS/OBJERR.) | |
613 address generate_handler_for_unsafe_access() { | |
614 StubCodeMark mark(this, "StubRoutines", "handler_for_unsafe_access"); | |
615 address start = __ pc(); | |
616 | |
304 | 617 __ push(0); // hole for return address-to-be |
618 __ pusha(); // push registers | |
0 | 619 Address next_pc(rsp, RegisterImpl::number_of_registers * BytesPerWord); |
620 BLOCK_COMMENT("call handle_unsafe_access"); | |
621 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, handle_unsafe_access))); | |
304 | 622 __ movptr(next_pc, rax); // stuff next address |
623 __ popa(); | |
0 | 624 __ ret(0); // jump to next address |
625 | |
626 return start; | |
627 } | |
628 | |
629 | |
630 //---------------------------------------------------------------------------------------------------- | |
631 // Non-destructive plausibility checks for oops | |
632 | |
633 address generate_verify_oop() { | |
634 StubCodeMark mark(this, "StubRoutines", "verify_oop"); | |
635 address start = __ pc(); | |
636 | |
637 // Incoming arguments on stack after saving rax,: | |
638 // | |
639 // [tos ]: saved rdx | |
640 // [tos + 1]: saved EFLAGS | |
641 // [tos + 2]: return address | |
642 // [tos + 3]: char* error message | |
643 // [tos + 4]: oop object to verify | |
644 // [tos + 5]: saved rax, - saved by caller and bashed | |
645 | |
646 Label exit, error; | |
304 | 647 __ pushf(); |
648 __ incrementl(ExternalAddress((address) StubRoutines::verify_oop_count_addr())); | |
649 __ push(rdx); // save rdx | |
0 | 650 // make sure object is 'reasonable' |
304 | 651 __ movptr(rax, Address(rsp, 4 * wordSize)); // get object |
652 __ testptr(rax, rax); | |
0 | 653 __ jcc(Assembler::zero, exit); // if obj is NULL it is ok |
654 | |
655 // Check if the oop is in the right area of memory | |
656 const int oop_mask = Universe::verify_oop_mask(); | |
657 const int oop_bits = Universe::verify_oop_bits(); | |
304 | 658 __ mov(rdx, rax); |
659 __ andptr(rdx, oop_mask); | |
660 __ cmpptr(rdx, oop_bits); | |
0 | 661 __ jcc(Assembler::notZero, error); |
662 | |
663 // make sure klass is 'reasonable' | |
304 | 664 __ movptr(rax, Address(rax, oopDesc::klass_offset_in_bytes())); // get klass |
665 __ testptr(rax, rax); | |
0 | 666 __ jcc(Assembler::zero, error); // if klass is NULL it is broken |
667 | |
668 // Check if the klass is in the right area of memory | |
669 const int klass_mask = Universe::verify_klass_mask(); | |
670 const int klass_bits = Universe::verify_klass_bits(); | |
304 | 671 __ mov(rdx, rax); |
672 __ andptr(rdx, klass_mask); | |
673 __ cmpptr(rdx, klass_bits); | |
0 | 674 __ jcc(Assembler::notZero, error); |
675 | |
676 // make sure klass' klass is 'reasonable' | |
304 | 677 __ movptr(rax, Address(rax, oopDesc::klass_offset_in_bytes())); // get klass' klass |
678 __ testptr(rax, rax); | |
0 | 679 __ jcc(Assembler::zero, error); // if klass' klass is NULL it is broken |
680 | |
304 | 681 __ mov(rdx, rax); |
682 __ andptr(rdx, klass_mask); | |
683 __ cmpptr(rdx, klass_bits); | |
0 | 684 __ jcc(Assembler::notZero, error); // if klass not in right area |
685 // of memory it is broken too. | |
686 | |
687 // return if everything seems ok | |
688 __ bind(exit); | |
304 | 689 __ movptr(rax, Address(rsp, 5 * wordSize)); // get saved rax, back |
690 __ pop(rdx); // restore rdx | |
691 __ popf(); // restore EFLAGS | |
0 | 692 __ ret(3 * wordSize); // pop arguments |
693 | |
694 // handle errors | |
695 __ bind(error); | |
304 | 696 __ movptr(rax, Address(rsp, 5 * wordSize)); // get saved rax, back |
697 __ pop(rdx); // get saved rdx back | |
698 __ popf(); // get saved EFLAGS off stack -- will be ignored | |
699 __ pusha(); // push registers (eip = return address & msg are already pushed) | |
0 | 700 BLOCK_COMMENT("call MacroAssembler::debug"); |
304 | 701 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug32))); |
702 __ popa(); | |
0 | 703 __ ret(3 * wordSize); // pop arguments |
704 return start; | |
705 } | |
706 | |
707 // | |
708 // Generate pre-barrier for array stores | |
709 // | |
710 // Input: | |
711 // start - starting address | |
712 // end - element count | |
713 void gen_write_ref_array_pre_barrier(Register start, Register count) { | |
714 assert_different_registers(start, count); | |
715 BarrierSet* bs = Universe::heap()->barrier_set(); | |
716 switch (bs->kind()) { | |
717 case BarrierSet::G1SATBCT: | |
718 case BarrierSet::G1SATBCTLogging: | |
719 { | |
304 | 720 __ pusha(); // push registers |
721 __ push(count); | |
722 __ push(start); | |
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723 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_pre))); |
362 | 724 __ addptr(rsp, 2*wordSize); |
304 | 725 __ popa(); |
0 | 726 } |
727 break; | |
728 case BarrierSet::CardTableModRef: | |
729 case BarrierSet::CardTableExtension: | |
730 case BarrierSet::ModRef: | |
731 break; | |
732 default : | |
733 ShouldNotReachHere(); | |
734 | |
735 } | |
736 } | |
737 | |
738 | |
739 // | |
740 // Generate a post-barrier for an array store | |
741 // | |
742 // start - starting address | |
743 // count - element count | |
744 // | |
745 // The two input registers are overwritten. | |
746 // | |
747 void gen_write_ref_array_post_barrier(Register start, Register count) { | |
748 BarrierSet* bs = Universe::heap()->barrier_set(); | |
749 assert_different_registers(start, count); | |
750 switch (bs->kind()) { | |
751 case BarrierSet::G1SATBCT: | |
752 case BarrierSet::G1SATBCTLogging: | |
753 { | |
304 | 754 __ pusha(); // push registers |
755 __ push(count); | |
756 __ push(start); | |
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757 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_post))); |
362 | 758 __ addptr(rsp, 2*wordSize); |
304 | 759 __ popa(); |
0 | 760 |
761 } | |
762 break; | |
763 | |
764 case BarrierSet::CardTableModRef: | |
765 case BarrierSet::CardTableExtension: | |
766 { | |
767 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | |
768 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); | |
769 | |
770 Label L_loop; | |
771 const Register end = count; // elements count; end == start+count-1 | |
772 assert_different_registers(start, end); | |
773 | |
304 | 774 __ lea(end, Address(start, count, Address::times_ptr, -wordSize)); |
775 __ shrptr(start, CardTableModRefBS::card_shift); | |
776 __ shrptr(end, CardTableModRefBS::card_shift); | |
777 __ subptr(end, start); // end --> count | |
0 | 778 __ BIND(L_loop); |
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779 intptr_t disp = (intptr_t) ct->byte_map_base; |
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780 Address cardtable(start, count, Address::times_1, disp); |
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781 __ movb(cardtable, 0); |
0 | 782 __ decrement(count); |
783 __ jcc(Assembler::greaterEqual, L_loop); | |
784 } | |
785 break; | |
786 case BarrierSet::ModRef: | |
787 break; | |
788 default : | |
789 ShouldNotReachHere(); | |
790 | |
791 } | |
792 } | |
793 | |
405 | 794 |
795 // Copy 64 bytes chunks | |
796 // | |
797 // Inputs: | |
798 // from - source array address | |
799 // to_from - destination array address - from | |
800 // qword_count - 8-bytes element count, negative | |
801 // | |
802 void xmm_copy_forward(Register from, Register to_from, Register qword_count) { | |
803 assert( UseSSE >= 2, "supported cpu only" ); | |
804 Label L_copy_64_bytes_loop, L_copy_64_bytes, L_copy_8_bytes, L_exit; | |
805 // Copy 64-byte chunks | |
806 __ jmpb(L_copy_64_bytes); | |
807 __ align(16); | |
808 __ BIND(L_copy_64_bytes_loop); | |
809 | |
810 if(UseUnalignedLoadStores) { | |
811 __ movdqu(xmm0, Address(from, 0)); | |
812 __ movdqu(Address(from, to_from, Address::times_1, 0), xmm0); | |
813 __ movdqu(xmm1, Address(from, 16)); | |
814 __ movdqu(Address(from, to_from, Address::times_1, 16), xmm1); | |
815 __ movdqu(xmm2, Address(from, 32)); | |
816 __ movdqu(Address(from, to_from, Address::times_1, 32), xmm2); | |
817 __ movdqu(xmm3, Address(from, 48)); | |
818 __ movdqu(Address(from, to_from, Address::times_1, 48), xmm3); | |
819 | |
820 } else { | |
821 __ movq(xmm0, Address(from, 0)); | |
822 __ movq(Address(from, to_from, Address::times_1, 0), xmm0); | |
823 __ movq(xmm1, Address(from, 8)); | |
824 __ movq(Address(from, to_from, Address::times_1, 8), xmm1); | |
825 __ movq(xmm2, Address(from, 16)); | |
826 __ movq(Address(from, to_from, Address::times_1, 16), xmm2); | |
827 __ movq(xmm3, Address(from, 24)); | |
828 __ movq(Address(from, to_from, Address::times_1, 24), xmm3); | |
829 __ movq(xmm4, Address(from, 32)); | |
830 __ movq(Address(from, to_from, Address::times_1, 32), xmm4); | |
831 __ movq(xmm5, Address(from, 40)); | |
832 __ movq(Address(from, to_from, Address::times_1, 40), xmm5); | |
833 __ movq(xmm6, Address(from, 48)); | |
834 __ movq(Address(from, to_from, Address::times_1, 48), xmm6); | |
835 __ movq(xmm7, Address(from, 56)); | |
836 __ movq(Address(from, to_from, Address::times_1, 56), xmm7); | |
837 } | |
838 | |
839 __ addl(from, 64); | |
840 __ BIND(L_copy_64_bytes); | |
841 __ subl(qword_count, 8); | |
842 __ jcc(Assembler::greaterEqual, L_copy_64_bytes_loop); | |
843 __ addl(qword_count, 8); | |
844 __ jccb(Assembler::zero, L_exit); | |
845 // | |
846 // length is too short, just copy qwords | |
847 // | |
848 __ BIND(L_copy_8_bytes); | |
849 __ movq(xmm0, Address(from, 0)); | |
850 __ movq(Address(from, to_from, Address::times_1), xmm0); | |
851 __ addl(from, 8); | |
852 __ decrement(qword_count); | |
853 __ jcc(Assembler::greater, L_copy_8_bytes); | |
854 __ BIND(L_exit); | |
855 } | |
856 | |
0 | 857 // Copy 64 bytes chunks |
858 // | |
859 // Inputs: | |
860 // from - source array address | |
861 // to_from - destination array address - from | |
862 // qword_count - 8-bytes element count, negative | |
863 // | |
864 void mmx_copy_forward(Register from, Register to_from, Register qword_count) { | |
405 | 865 assert( VM_Version::supports_mmx(), "supported cpu only" ); |
0 | 866 Label L_copy_64_bytes_loop, L_copy_64_bytes, L_copy_8_bytes, L_exit; |
867 // Copy 64-byte chunks | |
868 __ jmpb(L_copy_64_bytes); | |
869 __ align(16); | |
870 __ BIND(L_copy_64_bytes_loop); | |
871 __ movq(mmx0, Address(from, 0)); | |
872 __ movq(mmx1, Address(from, 8)); | |
873 __ movq(mmx2, Address(from, 16)); | |
874 __ movq(Address(from, to_from, Address::times_1, 0), mmx0); | |
875 __ movq(mmx3, Address(from, 24)); | |
876 __ movq(Address(from, to_from, Address::times_1, 8), mmx1); | |
877 __ movq(mmx4, Address(from, 32)); | |
878 __ movq(Address(from, to_from, Address::times_1, 16), mmx2); | |
879 __ movq(mmx5, Address(from, 40)); | |
880 __ movq(Address(from, to_from, Address::times_1, 24), mmx3); | |
881 __ movq(mmx6, Address(from, 48)); | |
882 __ movq(Address(from, to_from, Address::times_1, 32), mmx4); | |
883 __ movq(mmx7, Address(from, 56)); | |
884 __ movq(Address(from, to_from, Address::times_1, 40), mmx5); | |
885 __ movq(Address(from, to_from, Address::times_1, 48), mmx6); | |
886 __ movq(Address(from, to_from, Address::times_1, 56), mmx7); | |
304 | 887 __ addptr(from, 64); |
0 | 888 __ BIND(L_copy_64_bytes); |
889 __ subl(qword_count, 8); | |
890 __ jcc(Assembler::greaterEqual, L_copy_64_bytes_loop); | |
891 __ addl(qword_count, 8); | |
892 __ jccb(Assembler::zero, L_exit); | |
893 // | |
894 // length is too short, just copy qwords | |
895 // | |
896 __ BIND(L_copy_8_bytes); | |
897 __ movq(mmx0, Address(from, 0)); | |
898 __ movq(Address(from, to_from, Address::times_1), mmx0); | |
304 | 899 __ addptr(from, 8); |
0 | 900 __ decrement(qword_count); |
901 __ jcc(Assembler::greater, L_copy_8_bytes); | |
902 __ BIND(L_exit); | |
903 __ emms(); | |
904 } | |
905 | |
906 address generate_disjoint_copy(BasicType t, bool aligned, | |
907 Address::ScaleFactor sf, | |
908 address* entry, const char *name) { | |
909 __ align(CodeEntryAlignment); | |
910 StubCodeMark mark(this, "StubRoutines", name); | |
911 address start = __ pc(); | |
912 | |
913 Label L_0_count, L_exit, L_skip_align1, L_skip_align2, L_copy_byte; | |
914 Label L_copy_2_bytes, L_copy_4_bytes, L_copy_64_bytes; | |
915 | |
304 | 916 int shift = Address::times_ptr - sf; |
0 | 917 |
918 const Register from = rsi; // source array address | |
919 const Register to = rdi; // destination array address | |
920 const Register count = rcx; // elements count | |
921 const Register to_from = to; // (to - from) | |
922 const Register saved_to = rdx; // saved destination array address | |
923 | |
924 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 925 __ push(rsi); |
926 __ push(rdi); | |
927 __ movptr(from , Address(rsp, 12+ 4)); | |
928 __ movptr(to , Address(rsp, 12+ 8)); | |
0 | 929 __ movl(count, Address(rsp, 12+ 12)); |
930 if (t == T_OBJECT) { | |
931 __ testl(count, count); | |
932 __ jcc(Assembler::zero, L_0_count); | |
933 gen_write_ref_array_pre_barrier(to, count); | |
304 | 934 __ mov(saved_to, to); // save 'to' |
0 | 935 } |
936 | |
937 *entry = __ pc(); // Entry point from conjoint arraycopy stub. | |
938 BLOCK_COMMENT("Entry:"); | |
939 | |
304 | 940 __ subptr(to, from); // to --> to_from |
0 | 941 __ cmpl(count, 2<<shift); // Short arrays (< 8 bytes) copy by element |
942 __ jcc(Assembler::below, L_copy_4_bytes); // use unsigned cmp | |
405 | 943 if (!UseUnalignedLoadStores && !aligned && (t == T_BYTE || t == T_SHORT)) { |
0 | 944 // align source address at 4 bytes address boundary |
945 if (t == T_BYTE) { | |
946 // One byte misalignment happens only for byte arrays | |
947 __ testl(from, 1); | |
948 __ jccb(Assembler::zero, L_skip_align1); | |
949 __ movb(rax, Address(from, 0)); | |
950 __ movb(Address(from, to_from, Address::times_1, 0), rax); | |
951 __ increment(from); | |
952 __ decrement(count); | |
953 __ BIND(L_skip_align1); | |
954 } | |
955 // Two bytes misalignment happens only for byte and short (char) arrays | |
956 __ testl(from, 2); | |
957 __ jccb(Assembler::zero, L_skip_align2); | |
958 __ movw(rax, Address(from, 0)); | |
959 __ movw(Address(from, to_from, Address::times_1, 0), rax); | |
304 | 960 __ addptr(from, 2); |
0 | 961 __ subl(count, 1<<(shift-1)); |
962 __ BIND(L_skip_align2); | |
963 } | |
964 if (!VM_Version::supports_mmx()) { | |
304 | 965 __ mov(rax, count); // save 'count' |
966 __ shrl(count, shift); // bytes count | |
967 __ addptr(to_from, from);// restore 'to' | |
968 __ rep_mov(); | |
969 __ subptr(to_from, from);// restore 'to_from' | |
970 __ mov(count, rax); // restore 'count' | |
0 | 971 __ jmpb(L_copy_2_bytes); // all dwords were copied |
972 } else { | |
405 | 973 if (!UseUnalignedLoadStores) { |
974 // align to 8 bytes, we know we are 4 byte aligned to start | |
975 __ testptr(from, 4); | |
976 __ jccb(Assembler::zero, L_copy_64_bytes); | |
977 __ movl(rax, Address(from, 0)); | |
978 __ movl(Address(from, to_from, Address::times_1, 0), rax); | |
979 __ addptr(from, 4); | |
980 __ subl(count, 1<<shift); | |
981 } | |
0 | 982 __ BIND(L_copy_64_bytes); |
304 | 983 __ mov(rax, count); |
0 | 984 __ shrl(rax, shift+1); // 8 bytes chunk count |
985 // | |
986 // Copy 8-byte chunks through MMX registers, 8 per iteration of the loop | |
987 // | |
405 | 988 if (UseXMMForArrayCopy) { |
989 xmm_copy_forward(from, to_from, rax); | |
990 } else { | |
991 mmx_copy_forward(from, to_from, rax); | |
992 } | |
0 | 993 } |
994 // copy tailing dword | |
995 __ BIND(L_copy_4_bytes); | |
996 __ testl(count, 1<<shift); | |
997 __ jccb(Assembler::zero, L_copy_2_bytes); | |
998 __ movl(rax, Address(from, 0)); | |
999 __ movl(Address(from, to_from, Address::times_1, 0), rax); | |
1000 if (t == T_BYTE || t == T_SHORT) { | |
304 | 1001 __ addptr(from, 4); |
0 | 1002 __ BIND(L_copy_2_bytes); |
1003 // copy tailing word | |
1004 __ testl(count, 1<<(shift-1)); | |
1005 __ jccb(Assembler::zero, L_copy_byte); | |
1006 __ movw(rax, Address(from, 0)); | |
1007 __ movw(Address(from, to_from, Address::times_1, 0), rax); | |
1008 if (t == T_BYTE) { | |
304 | 1009 __ addptr(from, 2); |
0 | 1010 __ BIND(L_copy_byte); |
1011 // copy tailing byte | |
1012 __ testl(count, 1); | |
1013 __ jccb(Assembler::zero, L_exit); | |
1014 __ movb(rax, Address(from, 0)); | |
1015 __ movb(Address(from, to_from, Address::times_1, 0), rax); | |
1016 __ BIND(L_exit); | |
1017 } else { | |
1018 __ BIND(L_copy_byte); | |
1019 } | |
1020 } else { | |
1021 __ BIND(L_copy_2_bytes); | |
1022 } | |
1023 | |
1024 if (t == T_OBJECT) { | |
1025 __ movl(count, Address(rsp, 12+12)); // reread 'count' | |
304 | 1026 __ mov(to, saved_to); // restore 'to' |
0 | 1027 gen_write_ref_array_post_barrier(to, count); |
1028 __ BIND(L_0_count); | |
1029 } | |
1030 inc_copy_counter_np(t); | |
304 | 1031 __ pop(rdi); |
1032 __ pop(rsi); | |
0 | 1033 __ leave(); // required for proper stackwalking of RuntimeStub frame |
304 | 1034 __ xorptr(rax, rax); // return 0 |
0 | 1035 __ ret(0); |
1036 return start; | |
1037 } | |
1038 | |
1039 | |
1040 address generate_conjoint_copy(BasicType t, bool aligned, | |
1041 Address::ScaleFactor sf, | |
1042 address nooverlap_target, | |
1043 address* entry, const char *name) { | |
1044 __ align(CodeEntryAlignment); | |
1045 StubCodeMark mark(this, "StubRoutines", name); | |
1046 address start = __ pc(); | |
1047 | |
1048 Label L_0_count, L_exit, L_skip_align1, L_skip_align2, L_copy_byte; | |
1049 Label L_copy_2_bytes, L_copy_4_bytes, L_copy_8_bytes, L_copy_8_bytes_loop; | |
1050 | |
304 | 1051 int shift = Address::times_ptr - sf; |
0 | 1052 |
1053 const Register src = rax; // source array address | |
1054 const Register dst = rdx; // destination array address | |
1055 const Register from = rsi; // source array address | |
1056 const Register to = rdi; // destination array address | |
1057 const Register count = rcx; // elements count | |
1058 const Register end = rax; // array end address | |
1059 | |
1060 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1061 __ push(rsi); |
1062 __ push(rdi); | |
1063 __ movptr(src , Address(rsp, 12+ 4)); // from | |
1064 __ movptr(dst , Address(rsp, 12+ 8)); // to | |
1065 __ movl2ptr(count, Address(rsp, 12+12)); // count | |
0 | 1066 if (t == T_OBJECT) { |
1067 gen_write_ref_array_pre_barrier(dst, count); | |
1068 } | |
1069 | |
1070 if (entry != NULL) { | |
1071 *entry = __ pc(); // Entry point from generic arraycopy stub. | |
1072 BLOCK_COMMENT("Entry:"); | |
1073 } | |
1074 | |
1075 if (t == T_OBJECT) { | |
1076 __ testl(count, count); | |
1077 __ jcc(Assembler::zero, L_0_count); | |
1078 } | |
304 | 1079 __ mov(from, src); |
1080 __ mov(to , dst); | |
0 | 1081 |
1082 // arrays overlap test | |
1083 RuntimeAddress nooverlap(nooverlap_target); | |
304 | 1084 __ cmpptr(dst, src); |
1085 __ lea(end, Address(src, count, sf, 0)); // src + count * elem_size | |
0 | 1086 __ jump_cc(Assembler::belowEqual, nooverlap); |
304 | 1087 __ cmpptr(dst, end); |
0 | 1088 __ jump_cc(Assembler::aboveEqual, nooverlap); |
1089 | |
1090 // copy from high to low | |
1091 __ cmpl(count, 2<<shift); // Short arrays (< 8 bytes) copy by element | |
1092 __ jcc(Assembler::below, L_copy_4_bytes); // use unsigned cmp | |
1093 if (t == T_BYTE || t == T_SHORT) { | |
1094 // Align the end of destination array at 4 bytes address boundary | |
304 | 1095 __ lea(end, Address(dst, count, sf, 0)); |
0 | 1096 if (t == T_BYTE) { |
1097 // One byte misalignment happens only for byte arrays | |
1098 __ testl(end, 1); | |
1099 __ jccb(Assembler::zero, L_skip_align1); | |
1100 __ decrement(count); | |
1101 __ movb(rdx, Address(from, count, sf, 0)); | |
1102 __ movb(Address(to, count, sf, 0), rdx); | |
1103 __ BIND(L_skip_align1); | |
1104 } | |
1105 // Two bytes misalignment happens only for byte and short (char) arrays | |
1106 __ testl(end, 2); | |
1107 __ jccb(Assembler::zero, L_skip_align2); | |
304 | 1108 __ subptr(count, 1<<(shift-1)); |
0 | 1109 __ movw(rdx, Address(from, count, sf, 0)); |
1110 __ movw(Address(to, count, sf, 0), rdx); | |
1111 __ BIND(L_skip_align2); | |
1112 __ cmpl(count, 2<<shift); // Short arrays (< 8 bytes) copy by element | |
1113 __ jcc(Assembler::below, L_copy_4_bytes); | |
1114 } | |
1115 | |
1116 if (!VM_Version::supports_mmx()) { | |
1117 __ std(); | |
304 | 1118 __ mov(rax, count); // Save 'count' |
1119 __ mov(rdx, to); // Save 'to' | |
1120 __ lea(rsi, Address(from, count, sf, -4)); | |
1121 __ lea(rdi, Address(to , count, sf, -4)); | |
1122 __ shrptr(count, shift); // bytes count | |
1123 __ rep_mov(); | |
0 | 1124 __ cld(); |
304 | 1125 __ mov(count, rax); // restore 'count' |
0 | 1126 __ andl(count, (1<<shift)-1); // mask the number of rest elements |
304 | 1127 __ movptr(from, Address(rsp, 12+4)); // reread 'from' |
1128 __ mov(to, rdx); // restore 'to' | |
0 | 1129 __ jmpb(L_copy_2_bytes); // all dword were copied |
1130 } else { | |
1131 // Align to 8 bytes the end of array. It is aligned to 4 bytes already. | |
304 | 1132 __ testptr(end, 4); |
0 | 1133 __ jccb(Assembler::zero, L_copy_8_bytes); |
1134 __ subl(count, 1<<shift); | |
1135 __ movl(rdx, Address(from, count, sf, 0)); | |
1136 __ movl(Address(to, count, sf, 0), rdx); | |
1137 __ jmpb(L_copy_8_bytes); | |
1138 | |
1139 __ align(16); | |
1140 // Move 8 bytes | |
1141 __ BIND(L_copy_8_bytes_loop); | |
405 | 1142 if (UseXMMForArrayCopy) { |
1143 __ movq(xmm0, Address(from, count, sf, 0)); | |
1144 __ movq(Address(to, count, sf, 0), xmm0); | |
1145 } else { | |
1146 __ movq(mmx0, Address(from, count, sf, 0)); | |
1147 __ movq(Address(to, count, sf, 0), mmx0); | |
1148 } | |
0 | 1149 __ BIND(L_copy_8_bytes); |
1150 __ subl(count, 2<<shift); | |
1151 __ jcc(Assembler::greaterEqual, L_copy_8_bytes_loop); | |
1152 __ addl(count, 2<<shift); | |
405 | 1153 if (!UseXMMForArrayCopy) { |
1154 __ emms(); | |
1155 } | |
0 | 1156 } |
1157 __ BIND(L_copy_4_bytes); | |
1158 // copy prefix qword | |
1159 __ testl(count, 1<<shift); | |
1160 __ jccb(Assembler::zero, L_copy_2_bytes); | |
1161 __ movl(rdx, Address(from, count, sf, -4)); | |
1162 __ movl(Address(to, count, sf, -4), rdx); | |
1163 | |
1164 if (t == T_BYTE || t == T_SHORT) { | |
1165 __ subl(count, (1<<shift)); | |
1166 __ BIND(L_copy_2_bytes); | |
1167 // copy prefix dword | |
1168 __ testl(count, 1<<(shift-1)); | |
1169 __ jccb(Assembler::zero, L_copy_byte); | |
1170 __ movw(rdx, Address(from, count, sf, -2)); | |
1171 __ movw(Address(to, count, sf, -2), rdx); | |
1172 if (t == T_BYTE) { | |
1173 __ subl(count, 1<<(shift-1)); | |
1174 __ BIND(L_copy_byte); | |
1175 // copy prefix byte | |
1176 __ testl(count, 1); | |
1177 __ jccb(Assembler::zero, L_exit); | |
1178 __ movb(rdx, Address(from, 0)); | |
1179 __ movb(Address(to, 0), rdx); | |
1180 __ BIND(L_exit); | |
1181 } else { | |
1182 __ BIND(L_copy_byte); | |
1183 } | |
1184 } else { | |
1185 __ BIND(L_copy_2_bytes); | |
1186 } | |
1187 if (t == T_OBJECT) { | |
304 | 1188 __ movl2ptr(count, Address(rsp, 12+12)); // reread count |
0 | 1189 gen_write_ref_array_post_barrier(to, count); |
1190 __ BIND(L_0_count); | |
1191 } | |
1192 inc_copy_counter_np(t); | |
304 | 1193 __ pop(rdi); |
1194 __ pop(rsi); | |
0 | 1195 __ leave(); // required for proper stackwalking of RuntimeStub frame |
304 | 1196 __ xorptr(rax, rax); // return 0 |
0 | 1197 __ ret(0); |
1198 return start; | |
1199 } | |
1200 | |
1201 | |
1202 address generate_disjoint_long_copy(address* entry, const char *name) { | |
1203 __ align(CodeEntryAlignment); | |
1204 StubCodeMark mark(this, "StubRoutines", name); | |
1205 address start = __ pc(); | |
1206 | |
1207 Label L_copy_8_bytes, L_copy_8_bytes_loop; | |
1208 const Register from = rax; // source array address | |
1209 const Register to = rdx; // destination array address | |
1210 const Register count = rcx; // elements count | |
1211 const Register to_from = rdx; // (to - from) | |
1212 | |
1213 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1214 __ movptr(from , Address(rsp, 8+0)); // from |
1215 __ movptr(to , Address(rsp, 8+4)); // to | |
1216 __ movl2ptr(count, Address(rsp, 8+8)); // count | |
0 | 1217 |
1218 *entry = __ pc(); // Entry point from conjoint arraycopy stub. | |
1219 BLOCK_COMMENT("Entry:"); | |
1220 | |
304 | 1221 __ subptr(to, from); // to --> to_from |
0 | 1222 if (VM_Version::supports_mmx()) { |
405 | 1223 if (UseXMMForArrayCopy) { |
1224 xmm_copy_forward(from, to_from, count); | |
1225 } else { | |
1226 mmx_copy_forward(from, to_from, count); | |
1227 } | |
0 | 1228 } else { |
1229 __ jmpb(L_copy_8_bytes); | |
1230 __ align(16); | |
1231 __ BIND(L_copy_8_bytes_loop); | |
1232 __ fild_d(Address(from, 0)); | |
1233 __ fistp_d(Address(from, to_from, Address::times_1)); | |
304 | 1234 __ addptr(from, 8); |
0 | 1235 __ BIND(L_copy_8_bytes); |
1236 __ decrement(count); | |
1237 __ jcc(Assembler::greaterEqual, L_copy_8_bytes_loop); | |
1238 } | |
1239 inc_copy_counter_np(T_LONG); | |
1240 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1241 __ xorptr(rax, rax); // return 0 |
0 | 1242 __ ret(0); |
1243 return start; | |
1244 } | |
1245 | |
1246 address generate_conjoint_long_copy(address nooverlap_target, | |
1247 address* entry, const char *name) { | |
1248 __ align(CodeEntryAlignment); | |
1249 StubCodeMark mark(this, "StubRoutines", name); | |
1250 address start = __ pc(); | |
1251 | |
1252 Label L_copy_8_bytes, L_copy_8_bytes_loop; | |
1253 const Register from = rax; // source array address | |
1254 const Register to = rdx; // destination array address | |
1255 const Register count = rcx; // elements count | |
1256 const Register end_from = rax; // source array end address | |
1257 | |
1258 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1259 __ movptr(from , Address(rsp, 8+0)); // from |
1260 __ movptr(to , Address(rsp, 8+4)); // to | |
1261 __ movl2ptr(count, Address(rsp, 8+8)); // count | |
0 | 1262 |
1263 *entry = __ pc(); // Entry point from generic arraycopy stub. | |
1264 BLOCK_COMMENT("Entry:"); | |
1265 | |
1266 // arrays overlap test | |
304 | 1267 __ cmpptr(to, from); |
0 | 1268 RuntimeAddress nooverlap(nooverlap_target); |
1269 __ jump_cc(Assembler::belowEqual, nooverlap); | |
304 | 1270 __ lea(end_from, Address(from, count, Address::times_8, 0)); |
1271 __ cmpptr(to, end_from); | |
1272 __ movptr(from, Address(rsp, 8)); // from | |
0 | 1273 __ jump_cc(Assembler::aboveEqual, nooverlap); |
1274 | |
1275 __ jmpb(L_copy_8_bytes); | |
1276 | |
1277 __ align(16); | |
1278 __ BIND(L_copy_8_bytes_loop); | |
1279 if (VM_Version::supports_mmx()) { | |
405 | 1280 if (UseXMMForArrayCopy) { |
1281 __ movq(xmm0, Address(from, count, Address::times_8)); | |
1282 __ movq(Address(to, count, Address::times_8), xmm0); | |
1283 } else { | |
1284 __ movq(mmx0, Address(from, count, Address::times_8)); | |
1285 __ movq(Address(to, count, Address::times_8), mmx0); | |
1286 } | |
0 | 1287 } else { |
1288 __ fild_d(Address(from, count, Address::times_8)); | |
1289 __ fistp_d(Address(to, count, Address::times_8)); | |
1290 } | |
1291 __ BIND(L_copy_8_bytes); | |
1292 __ decrement(count); | |
1293 __ jcc(Assembler::greaterEqual, L_copy_8_bytes_loop); | |
1294 | |
405 | 1295 if (VM_Version::supports_mmx() && !UseXMMForArrayCopy) { |
0 | 1296 __ emms(); |
1297 } | |
1298 inc_copy_counter_np(T_LONG); | |
1299 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1300 __ xorptr(rax, rax); // return 0 |
0 | 1301 __ ret(0); |
1302 return start; | |
1303 } | |
1304 | |
1305 | |
1306 // Helper for generating a dynamic type check. | |
1307 // The sub_klass must be one of {rbx, rdx, rsi}. | |
1308 // The temp is killed. | |
1309 void generate_type_check(Register sub_klass, | |
1310 Address& super_check_offset_addr, | |
1311 Address& super_klass_addr, | |
1312 Register temp, | |
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1313 Label* L_success, Label* L_failure) { |
0 | 1314 BLOCK_COMMENT("type_check:"); |
1315 | |
1316 Label L_fallthrough; | |
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1317 #define LOCAL_JCC(assembler_con, label_ptr) \ |
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1318 if (label_ptr != NULL) __ jcc(assembler_con, *(label_ptr)); \ |
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1319 else __ jcc(assembler_con, L_fallthrough) /*omit semi*/ |
0 | 1320 |
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1321 // The following is a strange variation of the fast path which requires |
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1322 // one less register, because needed values are on the argument stack. |
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1323 // __ check_klass_subtype_fast_path(sub_klass, *super_klass*, temp, |
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1324 // L_success, L_failure, NULL); |
0 | 1325 assert_different_registers(sub_klass, temp); |
1326 | |
1327 int sc_offset = (klassOopDesc::header_size() * HeapWordSize + | |
1328 Klass::secondary_super_cache_offset_in_bytes()); | |
1329 | |
1330 // if the pointers are equal, we are done (e.g., String[] elements) | |
304 | 1331 __ cmpptr(sub_klass, super_klass_addr); |
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1332 LOCAL_JCC(Assembler::equal, L_success); |
0 | 1333 |
1334 // check the supertype display: | |
304 | 1335 __ movl2ptr(temp, super_check_offset_addr); |
0 | 1336 Address super_check_addr(sub_klass, temp, Address::times_1, 0); |
304 | 1337 __ movptr(temp, super_check_addr); // load displayed supertype |
1338 __ cmpptr(temp, super_klass_addr); // test the super type | |
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1339 LOCAL_JCC(Assembler::equal, L_success); |
0 | 1340 |
1341 // if it was a primary super, we can just fail immediately | |
1342 __ cmpl(super_check_offset_addr, sc_offset); | |
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1343 LOCAL_JCC(Assembler::notEqual, L_failure); |
0 | 1344 |
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1345 // The repne_scan instruction uses fixed registers, which will get spilled. |
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1346 // We happen to know this works best when super_klass is in rax. |
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1347 Register super_klass = temp; |
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1348 __ movptr(super_klass, super_klass_addr); |
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1349 __ check_klass_subtype_slow_path(sub_klass, super_klass, noreg, noreg, |
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1350 L_success, L_failure); |
0 | 1351 |
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1352 __ bind(L_fallthrough); |
0 | 1353 |
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1354 if (L_success == NULL) { BLOCK_COMMENT("L_success:"); } |
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1355 if (L_failure == NULL) { BLOCK_COMMENT("L_failure:"); } |
0 | 1356 |
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1357 #undef LOCAL_JCC |
0 | 1358 } |
1359 | |
1360 // | |
1361 // Generate checkcasting array copy stub | |
1362 // | |
1363 // Input: | |
1364 // 4(rsp) - source array address | |
1365 // 8(rsp) - destination array address | |
1366 // 12(rsp) - element count, can be zero | |
1367 // 16(rsp) - size_t ckoff (super_check_offset) | |
1368 // 20(rsp) - oop ckval (super_klass) | |
1369 // | |
1370 // Output: | |
1371 // rax, == 0 - success | |
1372 // rax, == -1^K - failure, where K is partial transfer count | |
1373 // | |
1374 address generate_checkcast_copy(const char *name, address* entry) { | |
1375 __ align(CodeEntryAlignment); | |
1376 StubCodeMark mark(this, "StubRoutines", name); | |
1377 address start = __ pc(); | |
1378 | |
1379 Label L_load_element, L_store_element, L_do_card_marks, L_done; | |
1380 | |
1381 // register use: | |
1382 // rax, rdx, rcx -- loop control (end_from, end_to, count) | |
1383 // rdi, rsi -- element access (oop, klass) | |
1384 // rbx, -- temp | |
1385 const Register from = rax; // source array address | |
1386 const Register to = rdx; // destination array address | |
1387 const Register length = rcx; // elements count | |
1388 const Register elem = rdi; // each oop copied | |
1389 const Register elem_klass = rsi; // each elem._klass (sub_klass) | |
1390 const Register temp = rbx; // lone remaining temp | |
1391 | |
1392 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
1393 | |
304 | 1394 __ push(rsi); |
1395 __ push(rdi); | |
1396 __ push(rbx); | |
0 | 1397 |
1398 Address from_arg(rsp, 16+ 4); // from | |
1399 Address to_arg(rsp, 16+ 8); // to | |
1400 Address length_arg(rsp, 16+12); // elements count | |
1401 Address ckoff_arg(rsp, 16+16); // super_check_offset | |
1402 Address ckval_arg(rsp, 16+20); // super_klass | |
1403 | |
1404 // Load up: | |
304 | 1405 __ movptr(from, from_arg); |
1406 __ movptr(to, to_arg); | |
1407 __ movl2ptr(length, length_arg); | |
0 | 1408 |
1409 *entry = __ pc(); // Entry point from generic arraycopy stub. | |
1410 BLOCK_COMMENT("Entry:"); | |
1411 | |
1412 //--------------------------------------------------------------- | |
1413 // Assembler stub will be used for this call to arraycopy | |
1414 // if the two arrays are subtypes of Object[] but the | |
1415 // destination array type is not equal to or a supertype | |
1416 // of the source type. Each element must be separately | |
1417 // checked. | |
1418 | |
1419 // Loop-invariant addresses. They are exclusive end pointers. | |
304 | 1420 Address end_from_addr(from, length, Address::times_ptr, 0); |
1421 Address end_to_addr(to, length, Address::times_ptr, 0); | |
0 | 1422 |
1423 Register end_from = from; // re-use | |
1424 Register end_to = to; // re-use | |
1425 Register count = length; // re-use | |
1426 | |
1427 // Loop-variant addresses. They assume post-incremented count < 0. | |
304 | 1428 Address from_element_addr(end_from, count, Address::times_ptr, 0); |
1429 Address to_element_addr(end_to, count, Address::times_ptr, 0); | |
0 | 1430 Address elem_klass_addr(elem, oopDesc::klass_offset_in_bytes()); |
1431 | |
1432 // Copy from low to high addresses, indexed from the end of each array. | |
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1433 gen_write_ref_array_pre_barrier(to, count); |
304 | 1434 __ lea(end_from, end_from_addr); |
1435 __ lea(end_to, end_to_addr); | |
0 | 1436 assert(length == count, ""); // else fix next line: |
304 | 1437 __ negptr(count); // negate and test the length |
0 | 1438 __ jccb(Assembler::notZero, L_load_element); |
1439 | |
1440 // Empty array: Nothing to do. | |
304 | 1441 __ xorptr(rax, rax); // return 0 on (trivial) success |
0 | 1442 __ jmp(L_done); |
1443 | |
1444 // ======== begin loop ======== | |
1445 // (Loop is rotated; its entry is L_load_element.) | |
1446 // Loop control: | |
1447 // for (count = -count; count != 0; count++) | |
1448 // Base pointers src, dst are biased by 8*count,to last element. | |
1449 __ align(16); | |
1450 | |
1451 __ BIND(L_store_element); | |
304 | 1452 __ movptr(to_element_addr, elem); // store the oop |
0 | 1453 __ increment(count); // increment the count toward zero |
1454 __ jccb(Assembler::zero, L_do_card_marks); | |
1455 | |
1456 // ======== loop entry is here ======== | |
1457 __ BIND(L_load_element); | |
304 | 1458 __ movptr(elem, from_element_addr); // load the oop |
1459 __ testptr(elem, elem); | |
0 | 1460 __ jccb(Assembler::zero, L_store_element); |
1461 | |
1462 // (Could do a trick here: Remember last successful non-null | |
1463 // element stored and make a quick oop equality check on it.) | |
1464 | |
304 | 1465 __ movptr(elem_klass, elem_klass_addr); // query the object klass |
0 | 1466 generate_type_check(elem_klass, ckoff_arg, ckval_arg, temp, |
1467 &L_store_element, NULL); | |
1468 // (On fall-through, we have failed the element type check.) | |
1469 // ======== end loop ======== | |
1470 | |
1471 // It was a real error; we must depend on the caller to finish the job. | |
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1472 // Register "count" = -1 * number of *remaining* oops, length_arg = *total* oops. |
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1473 // Emit GC store barriers for the oops we have copied (length_arg + count), |
0 | 1474 // and report their number to the caller. |
1475 __ addl(count, length_arg); // transfers = (length - remaining) | |
304 | 1476 __ movl2ptr(rax, count); // save the value |
1477 __ notptr(rax); // report (-1^K) to caller | |
1478 __ movptr(to, to_arg); // reload | |
0 | 1479 assert_different_registers(to, count, rax); |
1480 gen_write_ref_array_post_barrier(to, count); | |
1481 __ jmpb(L_done); | |
1482 | |
1483 // Come here on success only. | |
1484 __ BIND(L_do_card_marks); | |
304 | 1485 __ movl2ptr(count, length_arg); |
1486 __ movptr(to, to_arg); // reload | |
0 | 1487 gen_write_ref_array_post_barrier(to, count); |
304 | 1488 __ xorptr(rax, rax); // return 0 on success |
0 | 1489 |
1490 // Common exit point (success or failure). | |
1491 __ BIND(L_done); | |
304 | 1492 __ pop(rbx); |
1493 __ pop(rdi); | |
1494 __ pop(rsi); | |
0 | 1495 inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr); |
1496 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
1497 __ ret(0); | |
1498 | |
1499 return start; | |
1500 } | |
1501 | |
1502 // | |
1503 // Generate 'unsafe' array copy stub | |
1504 // Though just as safe as the other stubs, it takes an unscaled | |
1505 // size_t argument instead of an element count. | |
1506 // | |
1507 // Input: | |
1508 // 4(rsp) - source array address | |
1509 // 8(rsp) - destination array address | |
1510 // 12(rsp) - byte count, can be zero | |
1511 // | |
1512 // Output: | |
1513 // rax, == 0 - success | |
1514 // rax, == -1 - need to call System.arraycopy | |
1515 // | |
1516 // Examines the alignment of the operands and dispatches | |
1517 // to a long, int, short, or byte copy loop. | |
1518 // | |
1519 address generate_unsafe_copy(const char *name, | |
1520 address byte_copy_entry, | |
1521 address short_copy_entry, | |
1522 address int_copy_entry, | |
1523 address long_copy_entry) { | |
1524 | |
1525 Label L_long_aligned, L_int_aligned, L_short_aligned; | |
1526 | |
1527 __ align(CodeEntryAlignment); | |
1528 StubCodeMark mark(this, "StubRoutines", name); | |
1529 address start = __ pc(); | |
1530 | |
1531 const Register from = rax; // source array address | |
1532 const Register to = rdx; // destination array address | |
1533 const Register count = rcx; // elements count | |
1534 | |
1535 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1536 __ push(rsi); |
1537 __ push(rdi); | |
0 | 1538 Address from_arg(rsp, 12+ 4); // from |
1539 Address to_arg(rsp, 12+ 8); // to | |
1540 Address count_arg(rsp, 12+12); // byte count | |
1541 | |
1542 // Load up: | |
304 | 1543 __ movptr(from , from_arg); |
1544 __ movptr(to , to_arg); | |
1545 __ movl2ptr(count, count_arg); | |
0 | 1546 |
1547 // bump this on entry, not on exit: | |
1548 inc_counter_np(SharedRuntime::_unsafe_array_copy_ctr); | |
1549 | |
1550 const Register bits = rsi; | |
304 | 1551 __ mov(bits, from); |
1552 __ orptr(bits, to); | |
1553 __ orptr(bits, count); | |
0 | 1554 |
1555 __ testl(bits, BytesPerLong-1); | |
1556 __ jccb(Assembler::zero, L_long_aligned); | |
1557 | |
1558 __ testl(bits, BytesPerInt-1); | |
1559 __ jccb(Assembler::zero, L_int_aligned); | |
1560 | |
1561 __ testl(bits, BytesPerShort-1); | |
1562 __ jump_cc(Assembler::notZero, RuntimeAddress(byte_copy_entry)); | |
1563 | |
1564 __ BIND(L_short_aligned); | |
304 | 1565 __ shrptr(count, LogBytesPerShort); // size => short_count |
0 | 1566 __ movl(count_arg, count); // update 'count' |
1567 __ jump(RuntimeAddress(short_copy_entry)); | |
1568 | |
1569 __ BIND(L_int_aligned); | |
304 | 1570 __ shrptr(count, LogBytesPerInt); // size => int_count |
0 | 1571 __ movl(count_arg, count); // update 'count' |
1572 __ jump(RuntimeAddress(int_copy_entry)); | |
1573 | |
1574 __ BIND(L_long_aligned); | |
304 | 1575 __ shrptr(count, LogBytesPerLong); // size => qword_count |
0 | 1576 __ movl(count_arg, count); // update 'count' |
304 | 1577 __ pop(rdi); // Do pops here since jlong_arraycopy stub does not do it. |
1578 __ pop(rsi); | |
0 | 1579 __ jump(RuntimeAddress(long_copy_entry)); |
1580 | |
1581 return start; | |
1582 } | |
1583 | |
1584 | |
1585 // Perform range checks on the proposed arraycopy. | |
1586 // Smashes src_pos and dst_pos. (Uses them up for temps.) | |
1587 void arraycopy_range_checks(Register src, | |
1588 Register src_pos, | |
1589 Register dst, | |
1590 Register dst_pos, | |
1591 Address& length, | |
1592 Label& L_failed) { | |
1593 BLOCK_COMMENT("arraycopy_range_checks:"); | |
1594 const Register src_end = src_pos; // source array end position | |
1595 const Register dst_end = dst_pos; // destination array end position | |
1596 __ addl(src_end, length); // src_pos + length | |
1597 __ addl(dst_end, length); // dst_pos + length | |
1598 | |
1599 // if (src_pos + length > arrayOop(src)->length() ) FAIL; | |
1600 __ cmpl(src_end, Address(src, arrayOopDesc::length_offset_in_bytes())); | |
1601 __ jcc(Assembler::above, L_failed); | |
1602 | |
1603 // if (dst_pos + length > arrayOop(dst)->length() ) FAIL; | |
1604 __ cmpl(dst_end, Address(dst, arrayOopDesc::length_offset_in_bytes())); | |
1605 __ jcc(Assembler::above, L_failed); | |
1606 | |
1607 BLOCK_COMMENT("arraycopy_range_checks done"); | |
1608 } | |
1609 | |
1610 | |
1611 // | |
1612 // Generate generic array copy stubs | |
1613 // | |
1614 // Input: | |
1615 // 4(rsp) - src oop | |
1616 // 8(rsp) - src_pos | |
1617 // 12(rsp) - dst oop | |
1618 // 16(rsp) - dst_pos | |
1619 // 20(rsp) - element count | |
1620 // | |
1621 // Output: | |
1622 // rax, == 0 - success | |
1623 // rax, == -1^K - failure, where K is partial transfer count | |
1624 // | |
1625 address generate_generic_copy(const char *name, | |
1626 address entry_jbyte_arraycopy, | |
1627 address entry_jshort_arraycopy, | |
1628 address entry_jint_arraycopy, | |
1629 address entry_oop_arraycopy, | |
1630 address entry_jlong_arraycopy, | |
1631 address entry_checkcast_arraycopy) { | |
1632 Label L_failed, L_failed_0, L_objArray; | |
1633 | |
1634 { int modulus = CodeEntryAlignment; | |
1635 int target = modulus - 5; // 5 = sizeof jmp(L_failed) | |
1636 int advance = target - (__ offset() % modulus); | |
1637 if (advance < 0) advance += modulus; | |
1638 if (advance > 0) __ nop(advance); | |
1639 } | |
1640 StubCodeMark mark(this, "StubRoutines", name); | |
1641 | |
1642 // Short-hop target to L_failed. Makes for denser prologue code. | |
1643 __ BIND(L_failed_0); | |
1644 __ jmp(L_failed); | |
1645 assert(__ offset() % CodeEntryAlignment == 0, "no further alignment needed"); | |
1646 | |
1647 __ align(CodeEntryAlignment); | |
1648 address start = __ pc(); | |
1649 | |
1650 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1651 __ push(rsi); |
1652 __ push(rdi); | |
0 | 1653 |
1654 // bump this on entry, not on exit: | |
1655 inc_counter_np(SharedRuntime::_generic_array_copy_ctr); | |
1656 | |
1657 // Input values | |
1658 Address SRC (rsp, 12+ 4); | |
1659 Address SRC_POS (rsp, 12+ 8); | |
1660 Address DST (rsp, 12+12); | |
1661 Address DST_POS (rsp, 12+16); | |
1662 Address LENGTH (rsp, 12+20); | |
1663 | |
1664 //----------------------------------------------------------------------- | |
1665 // Assembler stub will be used for this call to arraycopy | |
1666 // if the following conditions are met: | |
1667 // | |
1668 // (1) src and dst must not be null. | |
1669 // (2) src_pos must not be negative. | |
1670 // (3) dst_pos must not be negative. | |
1671 // (4) length must not be negative. | |
1672 // (5) src klass and dst klass should be the same and not NULL. | |
1673 // (6) src and dst should be arrays. | |
1674 // (7) src_pos + length must not exceed length of src. | |
1675 // (8) dst_pos + length must not exceed length of dst. | |
1676 // | |
1677 | |
1678 const Register src = rax; // source array oop | |
1679 const Register src_pos = rsi; | |
1680 const Register dst = rdx; // destination array oop | |
1681 const Register dst_pos = rdi; | |
1682 const Register length = rcx; // transfer count | |
1683 | |
1684 // if (src == NULL) return -1; | |
304 | 1685 __ movptr(src, SRC); // src oop |
1686 __ testptr(src, src); | |
0 | 1687 __ jccb(Assembler::zero, L_failed_0); |
1688 | |
1689 // if (src_pos < 0) return -1; | |
304 | 1690 __ movl2ptr(src_pos, SRC_POS); // src_pos |
0 | 1691 __ testl(src_pos, src_pos); |
1692 __ jccb(Assembler::negative, L_failed_0); | |
1693 | |
1694 // if (dst == NULL) return -1; | |
304 | 1695 __ movptr(dst, DST); // dst oop |
1696 __ testptr(dst, dst); | |
0 | 1697 __ jccb(Assembler::zero, L_failed_0); |
1698 | |
1699 // if (dst_pos < 0) return -1; | |
304 | 1700 __ movl2ptr(dst_pos, DST_POS); // dst_pos |
0 | 1701 __ testl(dst_pos, dst_pos); |
1702 __ jccb(Assembler::negative, L_failed_0); | |
1703 | |
1704 // if (length < 0) return -1; | |
304 | 1705 __ movl2ptr(length, LENGTH); // length |
0 | 1706 __ testl(length, length); |
1707 __ jccb(Assembler::negative, L_failed_0); | |
1708 | |
1709 // if (src->klass() == NULL) return -1; | |
1710 Address src_klass_addr(src, oopDesc::klass_offset_in_bytes()); | |
1711 Address dst_klass_addr(dst, oopDesc::klass_offset_in_bytes()); | |
1712 const Register rcx_src_klass = rcx; // array klass | |
304 | 1713 __ movptr(rcx_src_klass, Address(src, oopDesc::klass_offset_in_bytes())); |
0 | 1714 |
1715 #ifdef ASSERT | |
1716 // assert(src->klass() != NULL); | |
1717 BLOCK_COMMENT("assert klasses not null"); | |
1718 { Label L1, L2; | |
304 | 1719 __ testptr(rcx_src_klass, rcx_src_klass); |
0 | 1720 __ jccb(Assembler::notZero, L2); // it is broken if klass is NULL |
1721 __ bind(L1); | |
1722 __ stop("broken null klass"); | |
1723 __ bind(L2); | |
304 | 1724 __ cmpptr(dst_klass_addr, (int32_t)NULL_WORD); |
0 | 1725 __ jccb(Assembler::equal, L1); // this would be broken also |
1726 BLOCK_COMMENT("assert done"); | |
1727 } | |
1728 #endif //ASSERT | |
1729 | |
1730 // Load layout helper (32-bits) | |
1731 // | |
1732 // |array_tag| | header_size | element_type | |log2_element_size| | |
1733 // 32 30 24 16 8 2 0 | |
1734 // | |
1735 // array_tag: typeArray = 0x3, objArray = 0x2, non-array = 0x0 | |
1736 // | |
1737 | |
1738 int lh_offset = klassOopDesc::header_size() * HeapWordSize + | |
1739 Klass::layout_helper_offset_in_bytes(); | |
1740 Address src_klass_lh_addr(rcx_src_klass, lh_offset); | |
1741 | |
1742 // Handle objArrays completely differently... | |
1743 jint objArray_lh = Klass::array_layout_helper(T_OBJECT); | |
1744 __ cmpl(src_klass_lh_addr, objArray_lh); | |
1745 __ jcc(Assembler::equal, L_objArray); | |
1746 | |
1747 // if (src->klass() != dst->klass()) return -1; | |
304 | 1748 __ cmpptr(rcx_src_klass, dst_klass_addr); |
0 | 1749 __ jccb(Assembler::notEqual, L_failed_0); |
1750 | |
1751 const Register rcx_lh = rcx; // layout helper | |
1752 assert(rcx_lh == rcx_src_klass, "known alias"); | |
1753 __ movl(rcx_lh, src_klass_lh_addr); | |
1754 | |
1755 // if (!src->is_Array()) return -1; | |
1756 __ cmpl(rcx_lh, Klass::_lh_neutral_value); | |
1757 __ jcc(Assembler::greaterEqual, L_failed_0); // signed cmp | |
1758 | |
1759 // At this point, it is known to be a typeArray (array_tag 0x3). | |
1760 #ifdef ASSERT | |
1761 { Label L; | |
1762 __ cmpl(rcx_lh, (Klass::_lh_array_tag_type_value << Klass::_lh_array_tag_shift)); | |
1763 __ jcc(Assembler::greaterEqual, L); // signed cmp | |
1764 __ stop("must be a primitive array"); | |
1765 __ bind(L); | |
1766 } | |
1767 #endif | |
1768 | |
1769 assert_different_registers(src, src_pos, dst, dst_pos, rcx_lh); | |
1770 arraycopy_range_checks(src, src_pos, dst, dst_pos, LENGTH, L_failed); | |
1771 | |
1772 // typeArrayKlass | |
1773 // | |
1774 // src_addr = (src + array_header_in_bytes()) + (src_pos << log2elemsize); | |
1775 // dst_addr = (dst + array_header_in_bytes()) + (dst_pos << log2elemsize); | |
1776 // | |
1777 const Register rsi_offset = rsi; // array offset | |
1778 const Register src_array = src; // src array offset | |
1779 const Register dst_array = dst; // dst array offset | |
1780 const Register rdi_elsize = rdi; // log2 element size | |
1781 | |
304 | 1782 __ mov(rsi_offset, rcx_lh); |
1783 __ shrptr(rsi_offset, Klass::_lh_header_size_shift); | |
1784 __ andptr(rsi_offset, Klass::_lh_header_size_mask); // array_offset | |
1785 __ addptr(src_array, rsi_offset); // src array offset | |
1786 __ addptr(dst_array, rsi_offset); // dst array offset | |
1787 __ andptr(rcx_lh, Klass::_lh_log2_element_size_mask); // log2 elsize | |
0 | 1788 |
1789 // next registers should be set before the jump to corresponding stub | |
1790 const Register from = src; // source array address | |
1791 const Register to = dst; // destination array address | |
1792 const Register count = rcx; // elements count | |
1793 // some of them should be duplicated on stack | |
1794 #define FROM Address(rsp, 12+ 4) | |
1795 #define TO Address(rsp, 12+ 8) // Not used now | |
1796 #define COUNT Address(rsp, 12+12) // Only for oop arraycopy | |
1797 | |
1798 BLOCK_COMMENT("scale indexes to element size"); | |
304 | 1799 __ movl2ptr(rsi, SRC_POS); // src_pos |
1800 __ shlptr(rsi); // src_pos << rcx (log2 elsize) | |
0 | 1801 assert(src_array == from, ""); |
304 | 1802 __ addptr(from, rsi); // from = src_array + SRC_POS << log2 elsize |
1803 __ movl2ptr(rdi, DST_POS); // dst_pos | |
1804 __ shlptr(rdi); // dst_pos << rcx (log2 elsize) | |
0 | 1805 assert(dst_array == to, ""); |
304 | 1806 __ addptr(to, rdi); // to = dst_array + DST_POS << log2 elsize |
1807 __ movptr(FROM, from); // src_addr | |
1808 __ mov(rdi_elsize, rcx_lh); // log2 elsize | |
1809 __ movl2ptr(count, LENGTH); // elements count | |
0 | 1810 |
1811 BLOCK_COMMENT("choose copy loop based on element size"); | |
1812 __ cmpl(rdi_elsize, 0); | |
1813 | |
1814 __ jump_cc(Assembler::equal, RuntimeAddress(entry_jbyte_arraycopy)); | |
1815 __ cmpl(rdi_elsize, LogBytesPerShort); | |
1816 __ jump_cc(Assembler::equal, RuntimeAddress(entry_jshort_arraycopy)); | |
1817 __ cmpl(rdi_elsize, LogBytesPerInt); | |
1818 __ jump_cc(Assembler::equal, RuntimeAddress(entry_jint_arraycopy)); | |
1819 #ifdef ASSERT | |
1820 __ cmpl(rdi_elsize, LogBytesPerLong); | |
1821 __ jccb(Assembler::notEqual, L_failed); | |
1822 #endif | |
304 | 1823 __ pop(rdi); // Do pops here since jlong_arraycopy stub does not do it. |
1824 __ pop(rsi); | |
0 | 1825 __ jump(RuntimeAddress(entry_jlong_arraycopy)); |
1826 | |
1827 __ BIND(L_failed); | |
304 | 1828 __ xorptr(rax, rax); |
1829 __ notptr(rax); // return -1 | |
1830 __ pop(rdi); | |
1831 __ pop(rsi); | |
0 | 1832 __ leave(); // required for proper stackwalking of RuntimeStub frame |
1833 __ ret(0); | |
1834 | |
1835 // objArrayKlass | |
1836 __ BIND(L_objArray); | |
1837 // live at this point: rcx_src_klass, src[_pos], dst[_pos] | |
1838 | |
1839 Label L_plain_copy, L_checkcast_copy; | |
1840 // test array classes for subtyping | |
304 | 1841 __ cmpptr(rcx_src_klass, dst_klass_addr); // usual case is exact equality |
0 | 1842 __ jccb(Assembler::notEqual, L_checkcast_copy); |
1843 | |
1844 // Identically typed arrays can be copied without element-wise checks. | |
1845 assert_different_registers(src, src_pos, dst, dst_pos, rcx_src_klass); | |
1846 arraycopy_range_checks(src, src_pos, dst, dst_pos, LENGTH, L_failed); | |
1847 | |
1848 __ BIND(L_plain_copy); | |
304 | 1849 __ movl2ptr(count, LENGTH); // elements count |
1850 __ movl2ptr(src_pos, SRC_POS); // reload src_pos | |
1851 __ lea(from, Address(src, src_pos, Address::times_ptr, | |
1852 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); // src_addr | |
1853 __ movl2ptr(dst_pos, DST_POS); // reload dst_pos | |
1854 __ lea(to, Address(dst, dst_pos, Address::times_ptr, | |
1855 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); // dst_addr | |
1856 __ movptr(FROM, from); // src_addr | |
1857 __ movptr(TO, to); // dst_addr | |
0 | 1858 __ movl(COUNT, count); // count |
1859 __ jump(RuntimeAddress(entry_oop_arraycopy)); | |
1860 | |
1861 __ BIND(L_checkcast_copy); | |
1862 // live at this point: rcx_src_klass, dst[_pos], src[_pos] | |
1863 { | |
1864 // Handy offsets: | |
1865 int ek_offset = (klassOopDesc::header_size() * HeapWordSize + | |
1866 objArrayKlass::element_klass_offset_in_bytes()); | |
1867 int sco_offset = (klassOopDesc::header_size() * HeapWordSize + | |
1868 Klass::super_check_offset_offset_in_bytes()); | |
1869 | |
1870 Register rsi_dst_klass = rsi; | |
1871 Register rdi_temp = rdi; | |
1872 assert(rsi_dst_klass == src_pos, "expected alias w/ src_pos"); | |
1873 assert(rdi_temp == dst_pos, "expected alias w/ dst_pos"); | |
1874 Address dst_klass_lh_addr(rsi_dst_klass, lh_offset); | |
1875 | |
1876 // Before looking at dst.length, make sure dst is also an objArray. | |
304 | 1877 __ movptr(rsi_dst_klass, dst_klass_addr); |
0 | 1878 __ cmpl(dst_klass_lh_addr, objArray_lh); |
1879 __ jccb(Assembler::notEqual, L_failed); | |
1880 | |
1881 // It is safe to examine both src.length and dst.length. | |
304 | 1882 __ movl2ptr(src_pos, SRC_POS); // reload rsi |
0 | 1883 arraycopy_range_checks(src, src_pos, dst, dst_pos, LENGTH, L_failed); |
1884 // (Now src_pos and dst_pos are killed, but not src and dst.) | |
1885 | |
1886 // We'll need this temp (don't forget to pop it after the type check). | |
304 | 1887 __ push(rbx); |
0 | 1888 Register rbx_src_klass = rbx; |
1889 | |
304 | 1890 __ mov(rbx_src_klass, rcx_src_klass); // spill away from rcx |
1891 __ movptr(rsi_dst_klass, dst_klass_addr); | |
0 | 1892 Address super_check_offset_addr(rsi_dst_klass, sco_offset); |
1893 Label L_fail_array_check; | |
1894 generate_type_check(rbx_src_klass, | |
1895 super_check_offset_addr, dst_klass_addr, | |
1896 rdi_temp, NULL, &L_fail_array_check); | |
1897 // (On fall-through, we have passed the array type check.) | |
304 | 1898 __ pop(rbx); |
0 | 1899 __ jmp(L_plain_copy); |
1900 | |
1901 __ BIND(L_fail_array_check); | |
1902 // Reshuffle arguments so we can call checkcast_arraycopy: | |
1903 | |
1904 // match initial saves for checkcast_arraycopy | |
304 | 1905 // push(rsi); // already done; see above |
1906 // push(rdi); // already done; see above | |
1907 // push(rbx); // already done; see above | |
0 | 1908 |
1909 // Marshal outgoing arguments now, freeing registers. | |
1910 Address from_arg(rsp, 16+ 4); // from | |
1911 Address to_arg(rsp, 16+ 8); // to | |
1912 Address length_arg(rsp, 16+12); // elements count | |
1913 Address ckoff_arg(rsp, 16+16); // super_check_offset | |
1914 Address ckval_arg(rsp, 16+20); // super_klass | |
1915 | |
1916 Address SRC_POS_arg(rsp, 16+ 8); | |
1917 Address DST_POS_arg(rsp, 16+16); | |
1918 Address LENGTH_arg(rsp, 16+20); | |
1919 // push rbx, changed the incoming offsets (why not just use rbp,??) | |
1920 // assert(SRC_POS_arg.disp() == SRC_POS.disp() + 4, ""); | |
1921 | |
304 | 1922 __ movptr(rbx, Address(rsi_dst_klass, ek_offset)); |
1923 __ movl2ptr(length, LENGTH_arg); // reload elements count | |
1924 __ movl2ptr(src_pos, SRC_POS_arg); // reload src_pos | |
1925 __ movl2ptr(dst_pos, DST_POS_arg); // reload dst_pos | |
0 | 1926 |
304 | 1927 __ movptr(ckval_arg, rbx); // destination element type |
0 | 1928 __ movl(rbx, Address(rbx, sco_offset)); |
1929 __ movl(ckoff_arg, rbx); // corresponding class check offset | |
1930 | |
1931 __ movl(length_arg, length); // outgoing length argument | |
1932 | |
304 | 1933 __ lea(from, Address(src, src_pos, Address::times_ptr, |
0 | 1934 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); |
304 | 1935 __ movptr(from_arg, from); |
0 | 1936 |
304 | 1937 __ lea(to, Address(dst, dst_pos, Address::times_ptr, |
0 | 1938 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); |
304 | 1939 __ movptr(to_arg, to); |
0 | 1940 __ jump(RuntimeAddress(entry_checkcast_arraycopy)); |
1941 } | |
1942 | |
1943 return start; | |
1944 } | |
1945 | |
1946 void generate_arraycopy_stubs() { | |
1947 address entry; | |
1948 address entry_jbyte_arraycopy; | |
1949 address entry_jshort_arraycopy; | |
1950 address entry_jint_arraycopy; | |
1951 address entry_oop_arraycopy; | |
1952 address entry_jlong_arraycopy; | |
1953 address entry_checkcast_arraycopy; | |
1954 | |
1955 StubRoutines::_arrayof_jbyte_disjoint_arraycopy = | |
1956 generate_disjoint_copy(T_BYTE, true, Address::times_1, &entry, | |
1957 "arrayof_jbyte_disjoint_arraycopy"); | |
1958 StubRoutines::_arrayof_jbyte_arraycopy = | |
1959 generate_conjoint_copy(T_BYTE, true, Address::times_1, entry, | |
1960 NULL, "arrayof_jbyte_arraycopy"); | |
1961 StubRoutines::_jbyte_disjoint_arraycopy = | |
1962 generate_disjoint_copy(T_BYTE, false, Address::times_1, &entry, | |
1963 "jbyte_disjoint_arraycopy"); | |
1964 StubRoutines::_jbyte_arraycopy = | |
1965 generate_conjoint_copy(T_BYTE, false, Address::times_1, entry, | |
1966 &entry_jbyte_arraycopy, "jbyte_arraycopy"); | |
1967 | |
1968 StubRoutines::_arrayof_jshort_disjoint_arraycopy = | |
1969 generate_disjoint_copy(T_SHORT, true, Address::times_2, &entry, | |
1970 "arrayof_jshort_disjoint_arraycopy"); | |
1971 StubRoutines::_arrayof_jshort_arraycopy = | |
1972 generate_conjoint_copy(T_SHORT, true, Address::times_2, entry, | |
1973 NULL, "arrayof_jshort_arraycopy"); | |
1974 StubRoutines::_jshort_disjoint_arraycopy = | |
1975 generate_disjoint_copy(T_SHORT, false, Address::times_2, &entry, | |
1976 "jshort_disjoint_arraycopy"); | |
1977 StubRoutines::_jshort_arraycopy = | |
1978 generate_conjoint_copy(T_SHORT, false, Address::times_2, entry, | |
1979 &entry_jshort_arraycopy, "jshort_arraycopy"); | |
1980 | |
1981 // Next arrays are always aligned on 4 bytes at least. | |
1982 StubRoutines::_jint_disjoint_arraycopy = | |
1983 generate_disjoint_copy(T_INT, true, Address::times_4, &entry, | |
1984 "jint_disjoint_arraycopy"); | |
1985 StubRoutines::_jint_arraycopy = | |
1986 generate_conjoint_copy(T_INT, true, Address::times_4, entry, | |
1987 &entry_jint_arraycopy, "jint_arraycopy"); | |
1988 | |
1989 StubRoutines::_oop_disjoint_arraycopy = | |
304 | 1990 generate_disjoint_copy(T_OBJECT, true, Address::times_ptr, &entry, |
0 | 1991 "oop_disjoint_arraycopy"); |
1992 StubRoutines::_oop_arraycopy = | |
304 | 1993 generate_conjoint_copy(T_OBJECT, true, Address::times_ptr, entry, |
0 | 1994 &entry_oop_arraycopy, "oop_arraycopy"); |
1995 | |
1996 StubRoutines::_jlong_disjoint_arraycopy = | |
1997 generate_disjoint_long_copy(&entry, "jlong_disjoint_arraycopy"); | |
1998 StubRoutines::_jlong_arraycopy = | |
1999 generate_conjoint_long_copy(entry, &entry_jlong_arraycopy, | |
2000 "jlong_arraycopy"); | |
2001 | |
2002 StubRoutines::_arrayof_jint_disjoint_arraycopy = | |
2003 StubRoutines::_jint_disjoint_arraycopy; | |
2004 StubRoutines::_arrayof_oop_disjoint_arraycopy = | |
2005 StubRoutines::_oop_disjoint_arraycopy; | |
2006 StubRoutines::_arrayof_jlong_disjoint_arraycopy = | |
2007 StubRoutines::_jlong_disjoint_arraycopy; | |
2008 | |
2009 StubRoutines::_arrayof_jint_arraycopy = StubRoutines::_jint_arraycopy; | |
2010 StubRoutines::_arrayof_oop_arraycopy = StubRoutines::_oop_arraycopy; | |
2011 StubRoutines::_arrayof_jlong_arraycopy = StubRoutines::_jlong_arraycopy; | |
2012 | |
2013 StubRoutines::_checkcast_arraycopy = | |
2014 generate_checkcast_copy("checkcast_arraycopy", | |
2015 &entry_checkcast_arraycopy); | |
2016 | |
2017 StubRoutines::_unsafe_arraycopy = | |
2018 generate_unsafe_copy("unsafe_arraycopy", | |
2019 entry_jbyte_arraycopy, | |
2020 entry_jshort_arraycopy, | |
2021 entry_jint_arraycopy, | |
2022 entry_jlong_arraycopy); | |
2023 | |
2024 StubRoutines::_generic_arraycopy = | |
2025 generate_generic_copy("generic_arraycopy", | |
2026 entry_jbyte_arraycopy, | |
2027 entry_jshort_arraycopy, | |
2028 entry_jint_arraycopy, | |
2029 entry_oop_arraycopy, | |
2030 entry_jlong_arraycopy, | |
2031 entry_checkcast_arraycopy); | |
2032 } | |
2033 | |
2034 public: | |
2035 // Information about frame layout at time of blocking runtime call. | |
2036 // Note that we only have to preserve callee-saved registers since | |
2037 // the compilers are responsible for supplying a continuation point | |
2038 // if they expect all registers to be preserved. | |
2039 enum layout { | |
2040 thread_off, // last_java_sp | |
2041 rbp_off, // callee saved register | |
2042 ret_pc, | |
2043 framesize | |
2044 }; | |
2045 | |
2046 private: | |
2047 | |
2048 #undef __ | |
2049 #define __ masm-> | |
2050 | |
2051 //------------------------------------------------------------------------------------------------------------------------ | |
2052 // Continuation point for throwing of implicit exceptions that are not handled in | |
2053 // the current activation. Fabricates an exception oop and initiates normal | |
2054 // exception dispatching in this frame. | |
2055 // | |
2056 // Previously the compiler (c2) allowed for callee save registers on Java calls. | |
2057 // This is no longer true after adapter frames were removed but could possibly | |
2058 // be brought back in the future if the interpreter code was reworked and it | |
2059 // was deemed worthwhile. The comment below was left to describe what must | |
2060 // happen here if callee saves were resurrected. As it stands now this stub | |
2061 // could actually be a vanilla BufferBlob and have now oopMap at all. | |
2062 // Since it doesn't make much difference we've chosen to leave it the | |
2063 // way it was in the callee save days and keep the comment. | |
2064 | |
2065 // If we need to preserve callee-saved values we need a callee-saved oop map and | |
2066 // therefore have to make these stubs into RuntimeStubs rather than BufferBlobs. | |
2067 // If the compiler needs all registers to be preserved between the fault | |
2068 // point and the exception handler then it must assume responsibility for that in | |
2069 // AbstractCompiler::continuation_for_implicit_null_exception or | |
2070 // continuation_for_implicit_division_by_zero_exception. All other implicit | |
2071 // exceptions (e.g., NullPointerException or AbstractMethodError on entry) are | |
2072 // either at call sites or otherwise assume that stack unwinding will be initiated, | |
2073 // so caller saved registers were assumed volatile in the compiler. | |
2074 address generate_throw_exception(const char* name, address runtime_entry, | |
2075 bool restore_saved_exception_pc) { | |
2076 | |
2077 int insts_size = 256; | |
2078 int locs_size = 32; | |
2079 | |
2080 CodeBuffer code(name, insts_size, locs_size); | |
2081 OopMapSet* oop_maps = new OopMapSet(); | |
2082 MacroAssembler* masm = new MacroAssembler(&code); | |
2083 | |
2084 address start = __ pc(); | |
2085 | |
2086 // This is an inlined and slightly modified version of call_VM | |
2087 // which has the ability to fetch the return PC out of | |
2088 // thread-local storage and also sets up last_Java_sp slightly | |
2089 // differently than the real call_VM | |
2090 Register java_thread = rbx; | |
2091 __ get_thread(java_thread); | |
2092 if (restore_saved_exception_pc) { | |
304 | 2093 __ movptr(rax, Address(java_thread, in_bytes(JavaThread::saved_exception_pc_offset()))); |
2094 __ push(rax); | |
0 | 2095 } |
2096 | |
2097 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
2098 | |
2099 // pc and rbp, already pushed | |
304 | 2100 __ subptr(rsp, (framesize-2) * wordSize); // prolog |
0 | 2101 |
2102 // Frame is now completed as far as size and linkage. | |
2103 | |
2104 int frame_complete = __ pc() - start; | |
2105 | |
2106 // push java thread (becomes first argument of C function) | |
304 | 2107 __ movptr(Address(rsp, thread_off * wordSize), java_thread); |
0 | 2108 |
2109 // Set up last_Java_sp and last_Java_fp | |
2110 __ set_last_Java_frame(java_thread, rsp, rbp, NULL); | |
2111 | |
2112 // Call runtime | |
2113 BLOCK_COMMENT("call runtime_entry"); | |
2114 __ call(RuntimeAddress(runtime_entry)); | |
2115 // Generate oop map | |
2116 OopMap* map = new OopMap(framesize, 0); | |
2117 oop_maps->add_gc_map(__ pc() - start, map); | |
2118 | |
2119 // restore the thread (cannot use the pushed argument since arguments | |
2120 // may be overwritten by C code generated by an optimizing compiler); | |
2121 // however can use the register value directly if it is callee saved. | |
2122 __ get_thread(java_thread); | |
2123 | |
2124 __ reset_last_Java_frame(java_thread, true, false); | |
2125 | |
2126 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
2127 | |
2128 // check for pending exceptions | |
2129 #ifdef ASSERT | |
2130 Label L; | |
304 | 2131 __ cmpptr(Address(java_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 2132 __ jcc(Assembler::notEqual, L); |
2133 __ should_not_reach_here(); | |
2134 __ bind(L); | |
2135 #endif /* ASSERT */ | |
2136 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
2137 | |
2138 | |
2139 RuntimeStub* stub = RuntimeStub::new_runtime_stub(name, &code, frame_complete, framesize, oop_maps, false); | |
2140 return stub->entry_point(); | |
2141 } | |
2142 | |
2143 | |
2144 void create_control_words() { | |
2145 // Round to nearest, 53-bit mode, exceptions masked | |
2146 StubRoutines::_fpu_cntrl_wrd_std = 0x027F; | |
2147 // Round to zero, 53-bit mode, exception mased | |
2148 StubRoutines::_fpu_cntrl_wrd_trunc = 0x0D7F; | |
2149 // Round to nearest, 24-bit mode, exceptions masked | |
2150 StubRoutines::_fpu_cntrl_wrd_24 = 0x007F; | |
2151 // Round to nearest, 64-bit mode, exceptions masked | |
2152 StubRoutines::_fpu_cntrl_wrd_64 = 0x037F; | |
2153 // Round to nearest, 64-bit mode, exceptions masked | |
2154 StubRoutines::_mxcsr_std = 0x1F80; | |
2155 // Note: the following two constants are 80-bit values | |
2156 // layout is critical for correct loading by FPU. | |
2157 // Bias for strict fp multiply/divide | |
2158 StubRoutines::_fpu_subnormal_bias1[0]= 0x00000000; // 2^(-15360) == 0x03ff 8000 0000 0000 0000 | |
2159 StubRoutines::_fpu_subnormal_bias1[1]= 0x80000000; | |
2160 StubRoutines::_fpu_subnormal_bias1[2]= 0x03ff; | |
2161 // Un-Bias for strict fp multiply/divide | |
2162 StubRoutines::_fpu_subnormal_bias2[0]= 0x00000000; // 2^(+15360) == 0x7bff 8000 0000 0000 0000 | |
2163 StubRoutines::_fpu_subnormal_bias2[1]= 0x80000000; | |
2164 StubRoutines::_fpu_subnormal_bias2[2]= 0x7bff; | |
2165 } | |
2166 | |
2167 //--------------------------------------------------------------------------- | |
2168 // Initialization | |
2169 | |
2170 void generate_initial() { | |
2171 // Generates all stubs and initializes the entry points | |
2172 | |
2173 //------------------------------------------------------------------------------------------------------------------------ | |
2174 // entry points that exist in all platforms | |
2175 // Note: This is code that could be shared among different platforms - however the benefit seems to be smaller than | |
2176 // the disadvantage of having a much more complicated generator structure. See also comment in stubRoutines.hpp. | |
2177 StubRoutines::_forward_exception_entry = generate_forward_exception(); | |
2178 | |
2179 StubRoutines::_call_stub_entry = | |
2180 generate_call_stub(StubRoutines::_call_stub_return_address); | |
2181 // is referenced by megamorphic call | |
2182 StubRoutines::_catch_exception_entry = generate_catch_exception(); | |
2183 | |
2184 // These are currently used by Solaris/Intel | |
2185 StubRoutines::_atomic_xchg_entry = generate_atomic_xchg(); | |
2186 | |
2187 StubRoutines::_handler_for_unsafe_access_entry = | |
2188 generate_handler_for_unsafe_access(); | |
2189 | |
2190 // platform dependent | |
2191 create_control_words(); | |
2192 | |
304 | 2193 StubRoutines::x86::_verify_mxcsr_entry = generate_verify_mxcsr(); |
2194 StubRoutines::x86::_verify_fpu_cntrl_wrd_entry = generate_verify_fpu_cntrl_wrd(); | |
0 | 2195 StubRoutines::_d2i_wrapper = generate_d2i_wrapper(T_INT, |
2196 CAST_FROM_FN_PTR(address, SharedRuntime::d2i)); | |
2197 StubRoutines::_d2l_wrapper = generate_d2i_wrapper(T_LONG, | |
2198 CAST_FROM_FN_PTR(address, SharedRuntime::d2l)); | |
2199 } | |
2200 | |
2201 | |
2202 void generate_all() { | |
2203 // Generates all stubs and initializes the entry points | |
2204 | |
2205 // These entry points require SharedInfo::stack0 to be set up in non-core builds | |
2206 // and need to be relocatable, so they each fabricate a RuntimeStub internally. | |
2207 StubRoutines::_throw_AbstractMethodError_entry = generate_throw_exception("AbstractMethodError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_AbstractMethodError), false); | |
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2208 StubRoutines::_throw_IncompatibleClassChangeError_entry= generate_throw_exception("IncompatibleClassChangeError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_IncompatibleClassChangeError), false); |
0 | 2209 StubRoutines::_throw_ArithmeticException_entry = generate_throw_exception("ArithmeticException throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_ArithmeticException), true); |
2210 StubRoutines::_throw_NullPointerException_entry = generate_throw_exception("NullPointerException throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException), true); | |
2211 StubRoutines::_throw_NullPointerException_at_call_entry= generate_throw_exception("NullPointerException at call throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException_at_call), false); | |
2212 StubRoutines::_throw_StackOverflowError_entry = generate_throw_exception("StackOverflowError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_StackOverflowError), false); | |
2213 | |
2214 //------------------------------------------------------------------------------------------------------------------------ | |
2215 // entry points that are platform specific | |
2216 | |
2217 // support for verify_oop (must happen after universe_init) | |
2218 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop(); | |
2219 | |
2220 // arraycopy stubs used by compilers | |
2221 generate_arraycopy_stubs(); | |
710 | 2222 |
2223 // generic method handle stubs | |
2224 if (EnableMethodHandles && SystemDictionary::MethodHandle_klass() != NULL) { | |
2225 for (MethodHandles::EntryKind ek = MethodHandles::_EK_FIRST; | |
2226 ek < MethodHandles::_EK_LIMIT; | |
2227 ek = MethodHandles::EntryKind(1 + (int)ek)) { | |
2228 StubCodeMark mark(this, "MethodHandle", MethodHandles::entry_name(ek)); | |
2229 MethodHandles::generate_method_handle_stub(_masm, ek); | |
2230 } | |
2231 } | |
0 | 2232 } |
2233 | |
2234 | |
2235 public: | |
2236 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) { | |
2237 if (all) { | |
2238 generate_all(); | |
2239 } else { | |
2240 generate_initial(); | |
2241 } | |
2242 } | |
2243 }; // end class declaration | |
2244 | |
2245 | |
2246 void StubGenerator_generate(CodeBuffer* code, bool all) { | |
2247 StubGenerator g(code, all); | |
2248 } |