Mercurial > hg > truffle
annotate src/cpu/sparc/vm/stubGenerator_sparc.cpp @ 1364:0dc88ad3244e
6940677: Use 64 bytes chunk copy for arraycopy on Sparc
Summary: For large arrays we should use 64 bytes chunks copy.
Reviewed-by: twisti
author | kvn |
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date | Tue, 06 Apr 2010 15:18:10 -0700 |
parents | 3cf667df43ef |
children | 6476042f815c |
rev | line source |
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0 | 1 /* |
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2 * Copyright 1997-2010 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_sparc.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-> | |
33 | |
34 #ifdef PRODUCT | |
35 #define BLOCK_COMMENT(str) /* nothing */ | |
36 #else | |
37 #define BLOCK_COMMENT(str) __ block_comment(str) | |
38 #endif | |
39 | |
40 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") | |
41 | |
42 // Note: The register L7 is used as L7_thread_cache, and may not be used | |
43 // any other way within this module. | |
44 | |
45 | |
46 static const Register& Lstub_temp = L2; | |
47 | |
48 // ------------------------------------------------------------------------------------------------------------------------- | |
49 // Stub Code definitions | |
50 | |
51 static address handle_unsafe_access() { | |
52 JavaThread* thread = JavaThread::current(); | |
53 address pc = thread->saved_exception_pc(); | |
54 address npc = thread->saved_exception_npc(); | |
55 // pc is the instruction which we must emulate | |
56 // doing a no-op is fine: return garbage from the load | |
57 | |
58 // request an async exception | |
59 thread->set_pending_unsafe_access_error(); | |
60 | |
61 // return address of next instruction to execute | |
62 return npc; | |
63 } | |
64 | |
65 class StubGenerator: public StubCodeGenerator { | |
66 private: | |
67 | |
68 #ifdef PRODUCT | |
69 #define inc_counter_np(a,b,c) (0) | |
70 #else | |
71 #define inc_counter_np(counter, t1, t2) \ | |
72 BLOCK_COMMENT("inc_counter " #counter); \ | |
727 | 73 __ inc_counter(&counter, t1, t2); |
0 | 74 #endif |
75 | |
76 //---------------------------------------------------------------------------------------------------- | |
77 // Call stubs are used to call Java from C | |
78 | |
79 address generate_call_stub(address& return_pc) { | |
80 StubCodeMark mark(this, "StubRoutines", "call_stub"); | |
81 address start = __ pc(); | |
82 | |
83 // Incoming arguments: | |
84 // | |
85 // o0 : call wrapper address | |
86 // o1 : result (address) | |
87 // o2 : result type | |
88 // o3 : method | |
89 // o4 : (interpreter) entry point | |
90 // o5 : parameters (address) | |
91 // [sp + 0x5c]: parameter size (in words) | |
92 // [sp + 0x60]: thread | |
93 // | |
94 // +---------------+ <--- sp + 0 | |
95 // | | | |
96 // . reg save area . | |
97 // | | | |
98 // +---------------+ <--- sp + 0x40 | |
99 // | | | |
100 // . extra 7 slots . | |
101 // | | | |
102 // +---------------+ <--- sp + 0x5c | |
103 // | param. size | | |
104 // +---------------+ <--- sp + 0x60 | |
105 // | thread | | |
106 // +---------------+ | |
107 // | | | |
108 | |
109 // note: if the link argument position changes, adjust | |
110 // the code in frame::entry_frame_call_wrapper() | |
111 | |
112 const Argument link = Argument(0, false); // used only for GC | |
113 const Argument result = Argument(1, false); | |
114 const Argument result_type = Argument(2, false); | |
115 const Argument method = Argument(3, false); | |
116 const Argument entry_point = Argument(4, false); | |
117 const Argument parameters = Argument(5, false); | |
118 const Argument parameter_size = Argument(6, false); | |
119 const Argument thread = Argument(7, false); | |
120 | |
121 // setup thread register | |
122 __ ld_ptr(thread.as_address(), G2_thread); | |
113
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123 __ reinit_heapbase(); |
0 | 124 |
125 #ifdef ASSERT | |
126 // make sure we have no pending exceptions | |
127 { const Register t = G3_scratch; | |
128 Label L; | |
129 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), t); | |
130 __ br_null(t, false, Assembler::pt, L); | |
131 __ delayed()->nop(); | |
132 __ stop("StubRoutines::call_stub: entered with pending exception"); | |
133 __ bind(L); | |
134 } | |
135 #endif | |
136 | |
137 // create activation frame & allocate space for parameters | |
138 { const Register t = G3_scratch; | |
139 __ ld_ptr(parameter_size.as_address(), t); // get parameter size (in words) | |
140 __ add(t, frame::memory_parameter_word_sp_offset, t); // add space for save area (in words) | |
141 __ round_to(t, WordsPerLong); // make sure it is multiple of 2 (in words) | |
142 __ sll(t, Interpreter::logStackElementSize(), t); // compute number of bytes | |
143 __ neg(t); // negate so it can be used with save | |
144 __ save(SP, t, SP); // setup new frame | |
145 } | |
146 | |
147 // +---------------+ <--- sp + 0 | |
148 // | | | |
149 // . reg save area . | |
150 // | | | |
151 // +---------------+ <--- sp + 0x40 | |
152 // | | | |
153 // . extra 7 slots . | |
154 // | | | |
155 // +---------------+ <--- sp + 0x5c | |
156 // | empty slot | (only if parameter size is even) | |
157 // +---------------+ | |
158 // | | | |
159 // . parameters . | |
160 // | | | |
161 // +---------------+ <--- fp + 0 | |
162 // | | | |
163 // . reg save area . | |
164 // | | | |
165 // +---------------+ <--- fp + 0x40 | |
166 // | | | |
167 // . extra 7 slots . | |
168 // | | | |
169 // +---------------+ <--- fp + 0x5c | |
170 // | param. size | | |
171 // +---------------+ <--- fp + 0x60 | |
172 // | thread | | |
173 // +---------------+ | |
174 // | | | |
175 | |
176 // pass parameters if any | |
177 BLOCK_COMMENT("pass parameters if any"); | |
178 { const Register src = parameters.as_in().as_register(); | |
179 const Register dst = Lentry_args; | |
180 const Register tmp = G3_scratch; | |
181 const Register cnt = G4_scratch; | |
182 | |
183 // test if any parameters & setup of Lentry_args | |
184 Label exit; | |
185 __ ld_ptr(parameter_size.as_in().as_address(), cnt); // parameter counter | |
186 __ add( FP, STACK_BIAS, dst ); | |
187 __ tst(cnt); | |
188 __ br(Assembler::zero, false, Assembler::pn, exit); | |
189 __ delayed()->sub(dst, BytesPerWord, dst); // setup Lentry_args | |
190 | |
191 // copy parameters if any | |
192 Label loop; | |
193 __ BIND(loop); | |
194 // Store tag first. | |
195 if (TaggedStackInterpreter) { | |
196 __ ld_ptr(src, 0, tmp); | |
197 __ add(src, BytesPerWord, src); // get next | |
198 __ st_ptr(tmp, dst, Interpreter::tag_offset_in_bytes()); | |
199 } | |
200 // Store parameter value | |
201 __ ld_ptr(src, 0, tmp); | |
202 __ add(src, BytesPerWord, src); | |
203 __ st_ptr(tmp, dst, Interpreter::value_offset_in_bytes()); | |
204 __ deccc(cnt); | |
205 __ br(Assembler::greater, false, Assembler::pt, loop); | |
206 __ delayed()->sub(dst, Interpreter::stackElementSize(), dst); | |
207 | |
208 // done | |
209 __ BIND(exit); | |
210 } | |
211 | |
212 // setup parameters, method & call Java function | |
213 #ifdef ASSERT | |
214 // layout_activation_impl checks it's notion of saved SP against | |
215 // this register, so if this changes update it as well. | |
216 const Register saved_SP = Lscratch; | |
217 __ mov(SP, saved_SP); // keep track of SP before call | |
218 #endif | |
219 | |
220 // setup parameters | |
221 const Register t = G3_scratch; | |
222 __ ld_ptr(parameter_size.as_in().as_address(), t); // get parameter size (in words) | |
223 __ sll(t, Interpreter::logStackElementSize(), t); // compute number of bytes | |
224 __ sub(FP, t, Gargs); // setup parameter pointer | |
225 #ifdef _LP64 | |
226 __ add( Gargs, STACK_BIAS, Gargs ); // Account for LP64 stack bias | |
227 #endif | |
228 __ mov(SP, O5_savedSP); | |
229 | |
230 | |
231 // do the call | |
232 // | |
233 // the following register must be setup: | |
234 // | |
235 // G2_thread | |
236 // G5_method | |
237 // Gargs | |
238 BLOCK_COMMENT("call Java function"); | |
239 __ jmpl(entry_point.as_in().as_register(), G0, O7); | |
240 __ delayed()->mov(method.as_in().as_register(), G5_method); // setup method | |
241 | |
242 BLOCK_COMMENT("call_stub_return_address:"); | |
243 return_pc = __ pc(); | |
244 | |
245 // The callee, if it wasn't interpreted, can return with SP changed so | |
246 // we can no longer assert of change of SP. | |
247 | |
248 // store result depending on type | |
249 // (everything that is not T_OBJECT, T_LONG, T_FLOAT, or T_DOUBLE | |
250 // is treated as T_INT) | |
251 { const Register addr = result .as_in().as_register(); | |
252 const Register type = result_type.as_in().as_register(); | |
253 Label is_long, is_float, is_double, is_object, exit; | |
254 __ cmp(type, T_OBJECT); __ br(Assembler::equal, false, Assembler::pn, is_object); | |
255 __ delayed()->cmp(type, T_FLOAT); __ br(Assembler::equal, false, Assembler::pn, is_float); | |
256 __ delayed()->cmp(type, T_DOUBLE); __ br(Assembler::equal, false, Assembler::pn, is_double); | |
257 __ delayed()->cmp(type, T_LONG); __ br(Assembler::equal, false, Assembler::pn, is_long); | |
258 __ delayed()->nop(); | |
259 | |
260 // store int result | |
261 __ st(O0, addr, G0); | |
262 | |
263 __ BIND(exit); | |
264 __ ret(); | |
265 __ delayed()->restore(); | |
266 | |
267 __ BIND(is_object); | |
268 __ ba(false, exit); | |
269 __ delayed()->st_ptr(O0, addr, G0); | |
270 | |
271 __ BIND(is_float); | |
272 __ ba(false, exit); | |
273 __ delayed()->stf(FloatRegisterImpl::S, F0, addr, G0); | |
274 | |
275 __ BIND(is_double); | |
276 __ ba(false, exit); | |
277 __ delayed()->stf(FloatRegisterImpl::D, F0, addr, G0); | |
278 | |
279 __ BIND(is_long); | |
280 #ifdef _LP64 | |
281 __ ba(false, exit); | |
282 __ delayed()->st_long(O0, addr, G0); // store entire long | |
283 #else | |
284 #if defined(COMPILER2) | |
285 // All return values are where we want them, except for Longs. C2 returns | |
286 // longs in G1 in the 32-bit build whereas the interpreter wants them in O0/O1. | |
287 // Since the interpreter will return longs in G1 and O0/O1 in the 32bit | |
288 // build we simply always use G1. | |
289 // Note: I tried to make c2 return longs in O0/O1 and G1 so we wouldn't have to | |
290 // do this here. Unfortunately if we did a rethrow we'd see an machepilog node | |
291 // first which would move g1 -> O0/O1 and destroy the exception we were throwing. | |
292 | |
293 __ ba(false, exit); | |
294 __ delayed()->stx(G1, addr, G0); // store entire long | |
295 #else | |
296 __ st(O1, addr, BytesPerInt); | |
297 __ ba(false, exit); | |
298 __ delayed()->st(O0, addr, G0); | |
299 #endif /* COMPILER2 */ | |
300 #endif /* _LP64 */ | |
301 } | |
302 return start; | |
303 } | |
304 | |
305 | |
306 //---------------------------------------------------------------------------------------------------- | |
307 // Return point for a Java call if there's an exception thrown in Java code. | |
308 // The exception is caught and transformed into a pending exception stored in | |
309 // JavaThread that can be tested from within the VM. | |
310 // | |
311 // Oexception: exception oop | |
312 | |
313 address generate_catch_exception() { | |
314 StubCodeMark mark(this, "StubRoutines", "catch_exception"); | |
315 | |
316 address start = __ pc(); | |
317 // verify that thread corresponds | |
318 __ verify_thread(); | |
319 | |
320 const Register& temp_reg = Gtemp; | |
727 | 321 Address pending_exception_addr (G2_thread, Thread::pending_exception_offset()); |
322 Address exception_file_offset_addr(G2_thread, Thread::exception_file_offset ()); | |
323 Address exception_line_offset_addr(G2_thread, Thread::exception_line_offset ()); | |
0 | 324 |
325 // set pending exception | |
326 __ verify_oop(Oexception); | |
327 __ st_ptr(Oexception, pending_exception_addr); | |
328 __ set((intptr_t)__FILE__, temp_reg); | |
329 __ st_ptr(temp_reg, exception_file_offset_addr); | |
330 __ set((intptr_t)__LINE__, temp_reg); | |
331 __ st(temp_reg, exception_line_offset_addr); | |
332 | |
333 // complete return to VM | |
334 assert(StubRoutines::_call_stub_return_address != NULL, "must have been generated before"); | |
335 | |
727 | 336 AddressLiteral stub_ret(StubRoutines::_call_stub_return_address); |
337 __ jump_to(stub_ret, temp_reg); | |
0 | 338 __ delayed()->nop(); |
339 | |
340 return start; | |
341 } | |
342 | |
343 | |
344 //---------------------------------------------------------------------------------------------------- | |
345 // Continuation point for runtime calls returning with a pending exception | |
346 // The pending exception check happened in the runtime or native call stub | |
347 // The pending exception in Thread is converted into a Java-level exception | |
348 // | |
349 // Contract with Java-level exception handler: O0 = exception | |
350 // O1 = throwing pc | |
351 | |
352 address generate_forward_exception() { | |
353 StubCodeMark mark(this, "StubRoutines", "forward_exception"); | |
354 address start = __ pc(); | |
355 | |
356 // Upon entry, O7 has the return address returning into Java | |
357 // (interpreted or compiled) code; i.e. the return address | |
358 // becomes the throwing pc. | |
359 | |
360 const Register& handler_reg = Gtemp; | |
361 | |
727 | 362 Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
0 | 363 |
364 #ifdef ASSERT | |
365 // make sure that this code is only executed if there is a pending exception | |
366 { Label L; | |
367 __ ld_ptr(exception_addr, Gtemp); | |
368 __ br_notnull(Gtemp, false, Assembler::pt, L); | |
369 __ delayed()->nop(); | |
370 __ stop("StubRoutines::forward exception: no pending exception (1)"); | |
371 __ bind(L); | |
372 } | |
373 #endif | |
374 | |
375 // compute exception handler into handler_reg | |
376 __ get_thread(); | |
377 __ ld_ptr(exception_addr, Oexception); | |
378 __ verify_oop(Oexception); | |
379 __ save_frame(0); // compensates for compiler weakness | |
380 __ add(O7->after_save(), frame::pc_return_offset, Lscratch); // save the issuing PC | |
381 BLOCK_COMMENT("call exception_handler_for_return_address"); | |
1295 | 382 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), G2_thread, Lscratch); |
0 | 383 __ mov(O0, handler_reg); |
384 __ restore(); // compensates for compiler weakness | |
385 | |
386 __ ld_ptr(exception_addr, Oexception); | |
387 __ add(O7, frame::pc_return_offset, Oissuing_pc); // save the issuing PC | |
388 | |
389 #ifdef ASSERT | |
390 // make sure exception is set | |
391 { Label L; | |
392 __ br_notnull(Oexception, false, Assembler::pt, L); | |
393 __ delayed()->nop(); | |
394 __ stop("StubRoutines::forward exception: no pending exception (2)"); | |
395 __ bind(L); | |
396 } | |
397 #endif | |
398 // jump to exception handler | |
399 __ jmp(handler_reg, 0); | |
400 // clear pending exception | |
401 __ delayed()->st_ptr(G0, exception_addr); | |
402 | |
403 return start; | |
404 } | |
405 | |
406 | |
407 //------------------------------------------------------------------------------------------------------------------------ | |
408 // Continuation point for throwing of implicit exceptions that are not handled in | |
409 // the current activation. Fabricates an exception oop and initiates normal | |
410 // exception dispatching in this frame. Only callee-saved registers are preserved | |
411 // (through the normal register window / RegisterMap handling). | |
412 // If the compiler needs all registers to be preserved between the fault | |
413 // point and the exception handler then it must assume responsibility for that in | |
414 // AbstractCompiler::continuation_for_implicit_null_exception or | |
415 // continuation_for_implicit_division_by_zero_exception. All other implicit | |
416 // exceptions (e.g., NullPointerException or AbstractMethodError on entry) are | |
417 // either at call sites or otherwise assume that stack unwinding will be initiated, | |
418 // so caller saved registers were assumed volatile in the compiler. | |
419 | |
420 // Note that we generate only this stub into a RuntimeStub, because it needs to be | |
421 // properly traversed and ignored during GC, so we change the meaning of the "__" | |
422 // macro within this method. | |
423 #undef __ | |
424 #define __ masm-> | |
425 | |
426 address generate_throw_exception(const char* name, address runtime_entry, bool restore_saved_exception_pc) { | |
427 #ifdef ASSERT | |
428 int insts_size = VerifyThread ? 1 * K : 600; | |
429 #else | |
430 int insts_size = VerifyThread ? 1 * K : 256; | |
431 #endif /* ASSERT */ | |
432 int locs_size = 32; | |
433 | |
434 CodeBuffer code(name, insts_size, locs_size); | |
435 MacroAssembler* masm = new MacroAssembler(&code); | |
436 | |
437 __ verify_thread(); | |
438 | |
439 // This is an inlined and slightly modified version of call_VM | |
440 // which has the ability to fetch the return PC out of thread-local storage | |
441 __ assert_not_delayed(); | |
442 | |
443 // Note that we always push a frame because on the SPARC | |
444 // architecture, for all of our implicit exception kinds at call | |
445 // sites, the implicit exception is taken before the callee frame | |
446 // is pushed. | |
447 __ save_frame(0); | |
448 | |
449 int frame_complete = __ offset(); | |
450 | |
451 if (restore_saved_exception_pc) { | |
727 | 452 __ ld_ptr(G2_thread, JavaThread::saved_exception_pc_offset(), I7); |
0 | 453 __ sub(I7, frame::pc_return_offset, I7); |
454 } | |
455 | |
456 // Note that we always have a runtime stub frame on the top of stack by this point | |
457 Register last_java_sp = SP; | |
458 // 64-bit last_java_sp is biased! | |
459 __ set_last_Java_frame(last_java_sp, G0); | |
460 if (VerifyThread) __ mov(G2_thread, O0); // about to be smashed; pass early | |
461 __ save_thread(noreg); | |
462 // do the call | |
463 BLOCK_COMMENT("call runtime_entry"); | |
464 __ call(runtime_entry, relocInfo::runtime_call_type); | |
465 if (!VerifyThread) | |
466 __ delayed()->mov(G2_thread, O0); // pass thread as first argument | |
467 else | |
468 __ delayed()->nop(); // (thread already passed) | |
469 __ restore_thread(noreg); | |
470 __ reset_last_Java_frame(); | |
471 | |
472 // check for pending exceptions. use Gtemp as scratch register. | |
473 #ifdef ASSERT | |
474 Label L; | |
475 | |
727 | 476 Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
0 | 477 Register scratch_reg = Gtemp; |
478 __ ld_ptr(exception_addr, scratch_reg); | |
479 __ br_notnull(scratch_reg, false, Assembler::pt, L); | |
480 __ delayed()->nop(); | |
481 __ should_not_reach_here(); | |
482 __ bind(L); | |
483 #endif // ASSERT | |
484 BLOCK_COMMENT("call forward_exception_entry"); | |
485 __ call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type); | |
486 // we use O7 linkage so that forward_exception_entry has the issuing PC | |
487 __ delayed()->restore(); | |
488 | |
489 RuntimeStub* stub = RuntimeStub::new_runtime_stub(name, &code, frame_complete, masm->total_frame_size_in_bytes(0), NULL, false); | |
490 return stub->entry_point(); | |
491 } | |
492 | |
493 #undef __ | |
494 #define __ _masm-> | |
495 | |
496 | |
497 // Generate a routine that sets all the registers so we | |
498 // can tell if the stop routine prints them correctly. | |
499 address generate_test_stop() { | |
500 StubCodeMark mark(this, "StubRoutines", "test_stop"); | |
501 address start = __ pc(); | |
502 | |
503 int i; | |
504 | |
505 __ save_frame(0); | |
506 | |
507 static jfloat zero = 0.0, one = 1.0; | |
508 | |
509 // put addr in L0, then load through L0 to F0 | |
510 __ set((intptr_t)&zero, L0); __ ldf( FloatRegisterImpl::S, L0, 0, F0); | |
511 __ set((intptr_t)&one, L0); __ ldf( FloatRegisterImpl::S, L0, 0, F1); // 1.0 to F1 | |
512 | |
513 // use add to put 2..18 in F2..F18 | |
514 for ( i = 2; i <= 18; ++i ) { | |
515 __ fadd( FloatRegisterImpl::S, F1, as_FloatRegister(i-1), as_FloatRegister(i)); | |
516 } | |
517 | |
518 // Now put double 2 in F16, double 18 in F18 | |
519 __ ftof( FloatRegisterImpl::S, FloatRegisterImpl::D, F2, F16 ); | |
520 __ ftof( FloatRegisterImpl::S, FloatRegisterImpl::D, F18, F18 ); | |
521 | |
522 // use add to put 20..32 in F20..F32 | |
523 for (i = 20; i < 32; i += 2) { | |
524 __ fadd( FloatRegisterImpl::D, F16, as_FloatRegister(i-2), as_FloatRegister(i)); | |
525 } | |
526 | |
527 // put 0..7 in i's, 8..15 in l's, 16..23 in o's, 24..31 in g's | |
528 for ( i = 0; i < 8; ++i ) { | |
529 if (i < 6) { | |
530 __ set( i, as_iRegister(i)); | |
531 __ set(16 + i, as_oRegister(i)); | |
532 __ set(24 + i, as_gRegister(i)); | |
533 } | |
534 __ set( 8 + i, as_lRegister(i)); | |
535 } | |
536 | |
537 __ stop("testing stop"); | |
538 | |
539 | |
540 __ ret(); | |
541 __ delayed()->restore(); | |
542 | |
543 return start; | |
544 } | |
545 | |
546 | |
547 address generate_stop_subroutine() { | |
548 StubCodeMark mark(this, "StubRoutines", "stop_subroutine"); | |
549 address start = __ pc(); | |
550 | |
551 __ stop_subroutine(); | |
552 | |
553 return start; | |
554 } | |
555 | |
556 address generate_flush_callers_register_windows() { | |
557 StubCodeMark mark(this, "StubRoutines", "flush_callers_register_windows"); | |
558 address start = __ pc(); | |
559 | |
560 __ flush_windows(); | |
561 __ retl(false); | |
562 __ delayed()->add( FP, STACK_BIAS, O0 ); | |
563 // The returned value must be a stack pointer whose register save area | |
564 // is flushed, and will stay flushed while the caller executes. | |
565 | |
566 return start; | |
567 } | |
568 | |
569 // Helper functions for v8 atomic operations. | |
570 // | |
571 void get_v8_oop_lock_ptr(Register lock_ptr_reg, Register mark_oop_reg, Register scratch_reg) { | |
572 if (mark_oop_reg == noreg) { | |
573 address lock_ptr = (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(); | |
574 __ set((intptr_t)lock_ptr, lock_ptr_reg); | |
575 } else { | |
576 assert(scratch_reg != noreg, "just checking"); | |
577 address lock_ptr = (address)StubRoutines::Sparc::_v8_oop_lock_cache; | |
578 __ set((intptr_t)lock_ptr, lock_ptr_reg); | |
579 __ and3(mark_oop_reg, StubRoutines::Sparc::v8_oop_lock_mask_in_place, scratch_reg); | |
580 __ add(lock_ptr_reg, scratch_reg, lock_ptr_reg); | |
581 } | |
582 } | |
583 | |
584 void generate_v8_lock_prologue(Register lock_reg, Register lock_ptr_reg, Register yield_reg, Label& retry, Label& dontyield, Register mark_oop_reg = noreg, Register scratch_reg = noreg) { | |
585 | |
586 get_v8_oop_lock_ptr(lock_ptr_reg, mark_oop_reg, scratch_reg); | |
587 __ set(StubRoutines::Sparc::locked, lock_reg); | |
588 // Initialize yield counter | |
589 __ mov(G0,yield_reg); | |
590 | |
591 __ BIND(retry); | |
592 __ cmp(yield_reg, V8AtomicOperationUnderLockSpinCount); | |
593 __ br(Assembler::less, false, Assembler::pt, dontyield); | |
594 __ delayed()->nop(); | |
595 | |
596 // This code can only be called from inside the VM, this | |
597 // stub is only invoked from Atomic::add(). We do not | |
598 // want to use call_VM, because _last_java_sp and such | |
599 // must already be set. | |
600 // | |
601 // Save the regs and make space for a C call | |
602 __ save(SP, -96, SP); | |
603 __ save_all_globals_into_locals(); | |
604 BLOCK_COMMENT("call os::naked_sleep"); | |
605 __ call(CAST_FROM_FN_PTR(address, os::naked_sleep)); | |
606 __ delayed()->nop(); | |
607 __ restore_globals_from_locals(); | |
608 __ restore(); | |
609 // reset the counter | |
610 __ mov(G0,yield_reg); | |
611 | |
612 __ BIND(dontyield); | |
613 | |
614 // try to get lock | |
615 __ swap(lock_ptr_reg, 0, lock_reg); | |
616 | |
617 // did we get the lock? | |
618 __ cmp(lock_reg, StubRoutines::Sparc::unlocked); | |
619 __ br(Assembler::notEqual, true, Assembler::pn, retry); | |
620 __ delayed()->add(yield_reg,1,yield_reg); | |
621 | |
622 // yes, got lock. do the operation here. | |
623 } | |
624 | |
625 void generate_v8_lock_epilogue(Register lock_reg, Register lock_ptr_reg, Register yield_reg, Label& retry, Label& dontyield, Register mark_oop_reg = noreg, Register scratch_reg = noreg) { | |
626 __ st(lock_reg, lock_ptr_reg, 0); // unlock | |
627 } | |
628 | |
629 // Support for jint Atomic::xchg(jint exchange_value, volatile jint* dest). | |
630 // | |
631 // Arguments : | |
632 // | |
633 // exchange_value: O0 | |
634 // dest: O1 | |
635 // | |
636 // Results: | |
637 // | |
638 // O0: the value previously stored in dest | |
639 // | |
640 address generate_atomic_xchg() { | |
641 StubCodeMark mark(this, "StubRoutines", "atomic_xchg"); | |
642 address start = __ pc(); | |
643 | |
644 if (UseCASForSwap) { | |
645 // Use CAS instead of swap, just in case the MP hardware | |
646 // prefers to work with just one kind of synch. instruction. | |
647 Label retry; | |
648 __ BIND(retry); | |
649 __ mov(O0, O3); // scratch copy of exchange value | |
650 __ ld(O1, 0, O2); // observe the previous value | |
651 // try to replace O2 with O3 | |
652 __ cas_under_lock(O1, O2, O3, | |
653 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(),false); | |
654 __ cmp(O2, O3); | |
655 __ br(Assembler::notEqual, false, Assembler::pn, retry); | |
656 __ delayed()->nop(); | |
657 | |
658 __ retl(false); | |
659 __ delayed()->mov(O2, O0); // report previous value to caller | |
660 | |
661 } else { | |
662 if (VM_Version::v9_instructions_work()) { | |
663 __ retl(false); | |
664 __ delayed()->swap(O1, 0, O0); | |
665 } else { | |
666 const Register& lock_reg = O2; | |
667 const Register& lock_ptr_reg = O3; | |
668 const Register& yield_reg = O4; | |
669 | |
670 Label retry; | |
671 Label dontyield; | |
672 | |
673 generate_v8_lock_prologue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
674 // got the lock, do the swap | |
675 __ swap(O1, 0, O0); | |
676 | |
677 generate_v8_lock_epilogue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
678 __ retl(false); | |
679 __ delayed()->nop(); | |
680 } | |
681 } | |
682 | |
683 return start; | |
684 } | |
685 | |
686 | |
687 // Support for jint Atomic::cmpxchg(jint exchange_value, volatile jint* dest, jint compare_value) | |
688 // | |
689 // Arguments : | |
690 // | |
691 // exchange_value: O0 | |
692 // dest: O1 | |
693 // compare_value: O2 | |
694 // | |
695 // Results: | |
696 // | |
697 // O0: the value previously stored in dest | |
698 // | |
699 // Overwrites (v8): O3,O4,O5 | |
700 // | |
701 address generate_atomic_cmpxchg() { | |
702 StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg"); | |
703 address start = __ pc(); | |
704 | |
705 // cmpxchg(dest, compare_value, exchange_value) | |
706 __ cas_under_lock(O1, O2, O0, | |
707 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(),false); | |
708 __ retl(false); | |
709 __ delayed()->nop(); | |
710 | |
711 return start; | |
712 } | |
713 | |
714 // Support for jlong Atomic::cmpxchg(jlong exchange_value, volatile jlong *dest, jlong compare_value) | |
715 // | |
716 // Arguments : | |
717 // | |
718 // exchange_value: O1:O0 | |
719 // dest: O2 | |
720 // compare_value: O4:O3 | |
721 // | |
722 // Results: | |
723 // | |
724 // O1:O0: the value previously stored in dest | |
725 // | |
726 // This only works on V9, on V8 we don't generate any | |
727 // code and just return NULL. | |
728 // | |
729 // Overwrites: G1,G2,G3 | |
730 // | |
731 address generate_atomic_cmpxchg_long() { | |
732 StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg_long"); | |
733 address start = __ pc(); | |
734 | |
735 if (!VM_Version::supports_cx8()) | |
736 return NULL;; | |
737 __ sllx(O0, 32, O0); | |
738 __ srl(O1, 0, O1); | |
739 __ or3(O0,O1,O0); // O0 holds 64-bit value from compare_value | |
740 __ sllx(O3, 32, O3); | |
741 __ srl(O4, 0, O4); | |
742 __ or3(O3,O4,O3); // O3 holds 64-bit value from exchange_value | |
743 __ casx(O2, O3, O0); | |
744 __ srl(O0, 0, O1); // unpacked return value in O1:O0 | |
745 __ retl(false); | |
746 __ delayed()->srlx(O0, 32, O0); | |
747 | |
748 return start; | |
749 } | |
750 | |
751 | |
752 // Support for jint Atomic::add(jint add_value, volatile jint* dest). | |
753 // | |
754 // Arguments : | |
755 // | |
756 // add_value: O0 (e.g., +1 or -1) | |
757 // dest: O1 | |
758 // | |
759 // Results: | |
760 // | |
761 // O0: the new value stored in dest | |
762 // | |
763 // Overwrites (v9): O3 | |
764 // Overwrites (v8): O3,O4,O5 | |
765 // | |
766 address generate_atomic_add() { | |
767 StubCodeMark mark(this, "StubRoutines", "atomic_add"); | |
768 address start = __ pc(); | |
769 __ BIND(_atomic_add_stub); | |
770 | |
771 if (VM_Version::v9_instructions_work()) { | |
772 Label(retry); | |
773 __ BIND(retry); | |
774 | |
775 __ lduw(O1, 0, O2); | |
776 __ add(O0, O2, O3); | |
777 __ cas(O1, O2, O3); | |
778 __ cmp( O2, O3); | |
779 __ br(Assembler::notEqual, false, Assembler::pn, retry); | |
780 __ delayed()->nop(); | |
781 __ retl(false); | |
782 __ delayed()->add(O0, O2, O0); // note that cas made O2==O3 | |
783 } else { | |
784 const Register& lock_reg = O2; | |
785 const Register& lock_ptr_reg = O3; | |
786 const Register& value_reg = O4; | |
787 const Register& yield_reg = O5; | |
788 | |
789 Label(retry); | |
790 Label(dontyield); | |
791 | |
792 generate_v8_lock_prologue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
793 // got lock, do the increment | |
794 __ ld(O1, 0, value_reg); | |
795 __ add(O0, value_reg, value_reg); | |
796 __ st(value_reg, O1, 0); | |
797 | |
798 // %%% only for RMO and PSO | |
799 __ membar(Assembler::StoreStore); | |
800 | |
801 generate_v8_lock_epilogue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
802 | |
803 __ retl(false); | |
804 __ delayed()->mov(value_reg, O0); | |
805 } | |
806 | |
807 return start; | |
808 } | |
809 Label _atomic_add_stub; // called from other stubs | |
810 | |
811 | |
812 //------------------------------------------------------------------------------------------------------------------------ | |
813 // The following routine generates a subroutine to throw an asynchronous | |
814 // UnknownError when an unsafe access gets a fault that could not be | |
815 // reasonably prevented by the programmer. (Example: SIGBUS/OBJERR.) | |
816 // | |
817 // Arguments : | |
818 // | |
819 // trapping PC: O7 | |
820 // | |
821 // Results: | |
822 // posts an asynchronous exception, skips the trapping instruction | |
823 // | |
824 | |
825 address generate_handler_for_unsafe_access() { | |
826 StubCodeMark mark(this, "StubRoutines", "handler_for_unsafe_access"); | |
827 address start = __ pc(); | |
828 | |
829 const int preserve_register_words = (64 * 2); | |
727 | 830 Address preserve_addr(FP, (-preserve_register_words * wordSize) + STACK_BIAS); |
0 | 831 |
832 Register Lthread = L7_thread_cache; | |
833 int i; | |
834 | |
835 __ save_frame(0); | |
836 __ mov(G1, L1); | |
837 __ mov(G2, L2); | |
838 __ mov(G3, L3); | |
839 __ mov(G4, L4); | |
840 __ mov(G5, L5); | |
841 for (i = 0; i < (VM_Version::v9_instructions_work() ? 64 : 32); i += 2) { | |
842 __ stf(FloatRegisterImpl::D, as_FloatRegister(i), preserve_addr, i * wordSize); | |
843 } | |
844 | |
845 address entry_point = CAST_FROM_FN_PTR(address, handle_unsafe_access); | |
846 BLOCK_COMMENT("call handle_unsafe_access"); | |
847 __ call(entry_point, relocInfo::runtime_call_type); | |
848 __ delayed()->nop(); | |
849 | |
850 __ mov(L1, G1); | |
851 __ mov(L2, G2); | |
852 __ mov(L3, G3); | |
853 __ mov(L4, G4); | |
854 __ mov(L5, G5); | |
855 for (i = 0; i < (VM_Version::v9_instructions_work() ? 64 : 32); i += 2) { | |
856 __ ldf(FloatRegisterImpl::D, preserve_addr, as_FloatRegister(i), i * wordSize); | |
857 } | |
858 | |
859 __ verify_thread(); | |
860 | |
861 __ jmp(O0, 0); | |
862 __ delayed()->restore(); | |
863 | |
864 return start; | |
865 } | |
866 | |
867 | |
868 // Support for uint StubRoutine::Sparc::partial_subtype_check( Klass sub, Klass super ); | |
869 // Arguments : | |
870 // | |
871 // ret : O0, returned | |
872 // icc/xcc: set as O0 (depending on wordSize) | |
873 // sub : O1, argument, not changed | |
874 // super: O2, argument, not changed | |
875 // raddr: O7, blown by call | |
876 address generate_partial_subtype_check() { | |
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877 __ align(CodeEntryAlignment); |
0 | 878 StubCodeMark mark(this, "StubRoutines", "partial_subtype_check"); |
879 address start = __ pc(); | |
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880 Label miss; |
0 | 881 |
882 #if defined(COMPILER2) && !defined(_LP64) | |
883 // Do not use a 'save' because it blows the 64-bit O registers. | |
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884 __ add(SP,-4*wordSize,SP); // Make space for 4 temps (stack must be 2 words aligned) |
0 | 885 __ st_ptr(L0,SP,(frame::register_save_words+0)*wordSize); |
886 __ st_ptr(L1,SP,(frame::register_save_words+1)*wordSize); | |
887 __ st_ptr(L2,SP,(frame::register_save_words+2)*wordSize); | |
888 __ st_ptr(L3,SP,(frame::register_save_words+3)*wordSize); | |
889 Register Rret = O0; | |
890 Register Rsub = O1; | |
891 Register Rsuper = O2; | |
892 #else | |
893 __ save_frame(0); | |
894 Register Rret = I0; | |
895 Register Rsub = I1; | |
896 Register Rsuper = I2; | |
897 #endif | |
898 | |
899 Register L0_ary_len = L0; | |
900 Register L1_ary_ptr = L1; | |
901 Register L2_super = L2; | |
902 Register L3_index = L3; | |
903 | |
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904 __ check_klass_subtype_slow_path(Rsub, Rsuper, |
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905 L0, L1, L2, L3, |
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906 NULL, &miss); |
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907 |
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908 // Match falls through here. |
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909 __ addcc(G0,0,Rret); // set Z flags, Z result |
0 | 910 |
911 #if defined(COMPILER2) && !defined(_LP64) | |
912 __ ld_ptr(SP,(frame::register_save_words+0)*wordSize,L0); | |
913 __ ld_ptr(SP,(frame::register_save_words+1)*wordSize,L1); | |
914 __ ld_ptr(SP,(frame::register_save_words+2)*wordSize,L2); | |
915 __ ld_ptr(SP,(frame::register_save_words+3)*wordSize,L3); | |
916 __ retl(); // Result in Rret is zero; flags set to Z | |
917 __ delayed()->add(SP,4*wordSize,SP); | |
918 #else | |
919 __ ret(); // Result in Rret is zero; flags set to Z | |
920 __ delayed()->restore(); | |
921 #endif | |
922 | |
923 __ BIND(miss); | |
924 __ addcc(G0,1,Rret); // set NZ flags, NZ result | |
925 | |
926 #if defined(COMPILER2) && !defined(_LP64) | |
927 __ ld_ptr(SP,(frame::register_save_words+0)*wordSize,L0); | |
928 __ ld_ptr(SP,(frame::register_save_words+1)*wordSize,L1); | |
929 __ ld_ptr(SP,(frame::register_save_words+2)*wordSize,L2); | |
930 __ ld_ptr(SP,(frame::register_save_words+3)*wordSize,L3); | |
931 __ retl(); // Result in Rret is != 0; flags set to NZ | |
932 __ delayed()->add(SP,4*wordSize,SP); | |
933 #else | |
934 __ ret(); // Result in Rret is != 0; flags set to NZ | |
935 __ delayed()->restore(); | |
936 #endif | |
937 | |
938 return start; | |
939 } | |
940 | |
941 | |
942 // Called from MacroAssembler::verify_oop | |
943 // | |
944 address generate_verify_oop_subroutine() { | |
945 StubCodeMark mark(this, "StubRoutines", "verify_oop_stub"); | |
946 | |
947 address start = __ pc(); | |
948 | |
949 __ verify_oop_subroutine(); | |
950 | |
951 return start; | |
952 } | |
953 | |
954 static address disjoint_byte_copy_entry; | |
955 static address disjoint_short_copy_entry; | |
956 static address disjoint_int_copy_entry; | |
957 static address disjoint_long_copy_entry; | |
958 static address disjoint_oop_copy_entry; | |
959 | |
960 static address byte_copy_entry; | |
961 static address short_copy_entry; | |
962 static address int_copy_entry; | |
963 static address long_copy_entry; | |
964 static address oop_copy_entry; | |
965 | |
966 static address checkcast_copy_entry; | |
967 | |
968 // | |
969 // Verify that a register contains clean 32-bits positive value | |
970 // (high 32-bits are 0) so it could be used in 64-bits shifts (sllx, srax). | |
971 // | |
972 // Input: | |
973 // Rint - 32-bits value | |
974 // Rtmp - scratch | |
975 // | |
976 void assert_clean_int(Register Rint, Register Rtmp) { | |
977 #if defined(ASSERT) && defined(_LP64) | |
978 __ signx(Rint, Rtmp); | |
979 __ cmp(Rint, Rtmp); | |
980 __ breakpoint_trap(Assembler::notEqual, Assembler::xcc); | |
981 #endif | |
982 } | |
983 | |
984 // | |
985 // Generate overlap test for array copy stubs | |
986 // | |
987 // Input: | |
988 // O0 - array1 | |
989 // O1 - array2 | |
990 // O2 - element count | |
991 // | |
992 // Kills temps: O3, O4 | |
993 // | |
994 void array_overlap_test(address no_overlap_target, int log2_elem_size) { | |
995 assert(no_overlap_target != NULL, "must be generated"); | |
996 array_overlap_test(no_overlap_target, NULL, log2_elem_size); | |
997 } | |
998 void array_overlap_test(Label& L_no_overlap, int log2_elem_size) { | |
999 array_overlap_test(NULL, &L_no_overlap, log2_elem_size); | |
1000 } | |
1001 void array_overlap_test(address no_overlap_target, Label* NOLp, int log2_elem_size) { | |
1002 const Register from = O0; | |
1003 const Register to = O1; | |
1004 const Register count = O2; | |
1005 const Register to_from = O3; // to - from | |
1006 const Register byte_count = O4; // count << log2_elem_size | |
1007 | |
1008 __ subcc(to, from, to_from); | |
1009 __ sll_ptr(count, log2_elem_size, byte_count); | |
1010 if (NOLp == NULL) | |
1011 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, no_overlap_target); | |
1012 else | |
1013 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, (*NOLp)); | |
1014 __ delayed()->cmp(to_from, byte_count); | |
1015 if (NOLp == NULL) | |
1016 __ brx(Assembler::greaterEqual, false, Assembler::pt, no_overlap_target); | |
1017 else | |
1018 __ brx(Assembler::greaterEqual, false, Assembler::pt, (*NOLp)); | |
1019 __ delayed()->nop(); | |
1020 } | |
1021 | |
1022 // | |
1023 // Generate pre-write barrier for array. | |
1024 // | |
1025 // Input: | |
1026 // addr - register containing starting address | |
1027 // count - register containing element count | |
1028 // tmp - scratch register | |
1029 // | |
1030 // The input registers are overwritten. | |
1031 // | |
1032 void gen_write_ref_array_pre_barrier(Register addr, Register count) { | |
1033 BarrierSet* bs = Universe::heap()->barrier_set(); | |
1034 if (bs->has_write_ref_pre_barrier()) { | |
1035 assert(bs->has_write_ref_array_pre_opt(), | |
1036 "Else unsupported barrier set."); | |
1037 | |
1038 __ save_frame(0); | |
1039 // Save the necessary global regs... will be used after. | |
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1040 if (addr->is_global()) { |
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1041 __ mov(addr, L0); |
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1042 } |
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1043 if (count->is_global()) { |
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1044 __ mov(count, L1); |
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1045 } |
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1046 __ mov(addr->after_save(), O0); |
0 | 1047 // Get the count into O1 |
1048 __ call(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_pre)); | |
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1049 __ delayed()->mov(count->after_save(), O1); |
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1050 if (addr->is_global()) { |
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1051 __ mov(L0, addr); |
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1052 } |
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1053 if (count->is_global()) { |
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1054 __ mov(L1, count); |
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1055 } |
0 | 1056 __ restore(); |
1057 } | |
1058 } | |
1059 // | |
1060 // Generate post-write barrier for array. | |
1061 // | |
1062 // Input: | |
1063 // addr - register containing starting address | |
1064 // count - register containing element count | |
1065 // tmp - scratch register | |
1066 // | |
1067 // The input registers are overwritten. | |
1068 // | |
1069 void gen_write_ref_array_post_barrier(Register addr, Register count, | |
1070 Register tmp) { | |
1071 BarrierSet* bs = Universe::heap()->barrier_set(); | |
1072 | |
1073 switch (bs->kind()) { | |
1074 case BarrierSet::G1SATBCT: | |
1075 case BarrierSet::G1SATBCTLogging: | |
1076 { | |
1077 // Get some new fresh output registers. | |
1078 __ save_frame(0); | |
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1079 __ mov(addr->after_save(), O0); |
0 | 1080 __ call(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_post)); |
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1081 __ delayed()->mov(count->after_save(), O1); |
0 | 1082 __ restore(); |
1083 } | |
1084 break; | |
1085 case BarrierSet::CardTableModRef: | |
1086 case BarrierSet::CardTableExtension: | |
1087 { | |
1088 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | |
1089 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); | |
1090 assert_different_registers(addr, count, tmp); | |
1091 | |
1092 Label L_loop; | |
1093 | |
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1094 __ sll_ptr(count, LogBytesPerHeapOop, count); |
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1095 __ sub(count, BytesPerHeapOop, count); |
0 | 1096 __ add(count, addr, count); |
1097 // Use two shifts to clear out those low order two bits! (Cannot opt. into 1.) | |
1098 __ srl_ptr(addr, CardTableModRefBS::card_shift, addr); | |
1099 __ srl_ptr(count, CardTableModRefBS::card_shift, count); | |
1100 __ sub(count, addr, count); | |
727 | 1101 AddressLiteral rs(ct->byte_map_base); |
1102 __ set(rs, tmp); | |
0 | 1103 __ BIND(L_loop); |
727 | 1104 __ stb(G0, tmp, addr); |
0 | 1105 __ subcc(count, 1, count); |
1106 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
1107 __ delayed()->add(addr, 1, addr); | |
727 | 1108 } |
0 | 1109 break; |
1110 case BarrierSet::ModRef: | |
1111 break; | |
727 | 1112 default: |
0 | 1113 ShouldNotReachHere(); |
1114 } | |
1115 } | |
1116 | |
1117 | |
1118 // Copy big chunks forward with shift | |
1119 // | |
1120 // Inputs: | |
1121 // from - source arrays | |
1122 // to - destination array aligned to 8-bytes | |
1123 // count - elements count to copy >= the count equivalent to 16 bytes | |
1124 // count_dec - elements count's decrement equivalent to 16 bytes | |
1125 // L_copy_bytes - copy exit label | |
1126 // | |
1127 void copy_16_bytes_forward_with_shift(Register from, Register to, | |
1128 Register count, int count_dec, Label& L_copy_bytes) { | |
1129 Label L_loop, L_aligned_copy, L_copy_last_bytes; | |
1130 | |
1131 // if both arrays have the same alignment mod 8, do 8 bytes aligned copy | |
1132 __ andcc(from, 7, G1); // misaligned bytes | |
1133 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
1134 __ delayed()->nop(); | |
1135 | |
1136 const Register left_shift = G1; // left shift bit counter | |
1137 const Register right_shift = G5; // right shift bit counter | |
1138 | |
1139 __ sll(G1, LogBitsPerByte, left_shift); | |
1140 __ mov(64, right_shift); | |
1141 __ sub(right_shift, left_shift, right_shift); | |
1142 | |
1143 // | |
1144 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
1145 // to form 2 aligned 8-bytes chunks to store. | |
1146 // | |
1147 __ deccc(count, count_dec); // Pre-decrement 'count' | |
1148 __ andn(from, 7, from); // Align address | |
1149 __ ldx(from, 0, O3); | |
1150 __ inc(from, 8); | |
1151 __ align(16); | |
1152 __ BIND(L_loop); | |
1153 __ ldx(from, 0, O4); | |
1154 __ deccc(count, count_dec); // Can we do next iteration after this one? | |
1155 __ ldx(from, 8, G4); | |
1156 __ inc(to, 16); | |
1157 __ inc(from, 16); | |
1158 __ sllx(O3, left_shift, O3); | |
1159 __ srlx(O4, right_shift, G3); | |
1160 __ bset(G3, O3); | |
1161 __ stx(O3, to, -16); | |
1162 __ sllx(O4, left_shift, O4); | |
1163 __ srlx(G4, right_shift, G3); | |
1164 __ bset(G3, O4); | |
1165 __ stx(O4, to, -8); | |
1166 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
1167 __ delayed()->mov(G4, O3); | |
1168 | |
1169 __ inccc(count, count_dec>>1 ); // + 8 bytes | |
1170 __ brx(Assembler::negative, true, Assembler::pn, L_copy_last_bytes); | |
1171 __ delayed()->inc(count, count_dec>>1); // restore 'count' | |
1172 | |
1173 // copy 8 bytes, part of them already loaded in O3 | |
1174 __ ldx(from, 0, O4); | |
1175 __ inc(to, 8); | |
1176 __ inc(from, 8); | |
1177 __ sllx(O3, left_shift, O3); | |
1178 __ srlx(O4, right_shift, G3); | |
1179 __ bset(O3, G3); | |
1180 __ stx(G3, to, -8); | |
1181 | |
1182 __ BIND(L_copy_last_bytes); | |
1183 __ srl(right_shift, LogBitsPerByte, right_shift); // misaligned bytes | |
1184 __ br(Assembler::always, false, Assembler::pt, L_copy_bytes); | |
1185 __ delayed()->sub(from, right_shift, from); // restore address | |
1186 | |
1187 __ BIND(L_aligned_copy); | |
1188 } | |
1189 | |
1190 // Copy big chunks backward with shift | |
1191 // | |
1192 // Inputs: | |
1193 // end_from - source arrays end address | |
1194 // end_to - destination array end address aligned to 8-bytes | |
1195 // count - elements count to copy >= the count equivalent to 16 bytes | |
1196 // count_dec - elements count's decrement equivalent to 16 bytes | |
1197 // L_aligned_copy - aligned copy exit label | |
1198 // L_copy_bytes - copy exit label | |
1199 // | |
1200 void copy_16_bytes_backward_with_shift(Register end_from, Register end_to, | |
1201 Register count, int count_dec, | |
1202 Label& L_aligned_copy, Label& L_copy_bytes) { | |
1203 Label L_loop, L_copy_last_bytes; | |
1204 | |
1205 // if both arrays have the same alignment mod 8, do 8 bytes aligned copy | |
1206 __ andcc(end_from, 7, G1); // misaligned bytes | |
1207 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
1208 __ delayed()->deccc(count, count_dec); // Pre-decrement 'count' | |
1209 | |
1210 const Register left_shift = G1; // left shift bit counter | |
1211 const Register right_shift = G5; // right shift bit counter | |
1212 | |
1213 __ sll(G1, LogBitsPerByte, left_shift); | |
1214 __ mov(64, right_shift); | |
1215 __ sub(right_shift, left_shift, right_shift); | |
1216 | |
1217 // | |
1218 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
1219 // to form 2 aligned 8-bytes chunks to store. | |
1220 // | |
1221 __ andn(end_from, 7, end_from); // Align address | |
1222 __ ldx(end_from, 0, O3); | |
1223 __ align(16); | |
1224 __ BIND(L_loop); | |
1225 __ ldx(end_from, -8, O4); | |
1226 __ deccc(count, count_dec); // Can we do next iteration after this one? | |
1227 __ ldx(end_from, -16, G4); | |
1228 __ dec(end_to, 16); | |
1229 __ dec(end_from, 16); | |
1230 __ srlx(O3, right_shift, O3); | |
1231 __ sllx(O4, left_shift, G3); | |
1232 __ bset(G3, O3); | |
1233 __ stx(O3, end_to, 8); | |
1234 __ srlx(O4, right_shift, O4); | |
1235 __ sllx(G4, left_shift, G3); | |
1236 __ bset(G3, O4); | |
1237 __ stx(O4, end_to, 0); | |
1238 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
1239 __ delayed()->mov(G4, O3); | |
1240 | |
1241 __ inccc(count, count_dec>>1 ); // + 8 bytes | |
1242 __ brx(Assembler::negative, true, Assembler::pn, L_copy_last_bytes); | |
1243 __ delayed()->inc(count, count_dec>>1); // restore 'count' | |
1244 | |
1245 // copy 8 bytes, part of them already loaded in O3 | |
1246 __ ldx(end_from, -8, O4); | |
1247 __ dec(end_to, 8); | |
1248 __ dec(end_from, 8); | |
1249 __ srlx(O3, right_shift, O3); | |
1250 __ sllx(O4, left_shift, G3); | |
1251 __ bset(O3, G3); | |
1252 __ stx(G3, end_to, 0); | |
1253 | |
1254 __ BIND(L_copy_last_bytes); | |
1255 __ srl(left_shift, LogBitsPerByte, left_shift); // misaligned bytes | |
1256 __ br(Assembler::always, false, Assembler::pt, L_copy_bytes); | |
1257 __ delayed()->add(end_from, left_shift, end_from); // restore address | |
1258 } | |
1259 | |
1260 // | |
1261 // Generate stub for disjoint byte copy. If "aligned" is true, the | |
1262 // "from" and "to" addresses are assumed to be heapword aligned. | |
1263 // | |
1264 // Arguments for generated stub: | |
1265 // from: O0 | |
1266 // to: O1 | |
1267 // count: O2 treated as signed | |
1268 // | |
1269 address generate_disjoint_byte_copy(bool aligned, const char * name) { | |
1270 __ align(CodeEntryAlignment); | |
1271 StubCodeMark mark(this, "StubRoutines", name); | |
1272 address start = __ pc(); | |
1273 | |
1274 Label L_skip_alignment, L_align; | |
1275 Label L_copy_byte, L_copy_byte_loop, L_exit; | |
1276 | |
1277 const Register from = O0; // source array address | |
1278 const Register to = O1; // destination array address | |
1279 const Register count = O2; // elements count | |
1280 const Register offset = O5; // offset from start of arrays | |
1281 // O3, O4, G3, G4 are used as temp registers | |
1282 | |
1283 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1284 | |
1285 if (!aligned) disjoint_byte_copy_entry = __ pc(); | |
1286 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
1287 if (!aligned) BLOCK_COMMENT("Entry:"); | |
1288 | |
1289 // for short arrays, just do single element copy | |
1290 __ cmp(count, 23); // 16 + 7 | |
1291 __ brx(Assembler::less, false, Assembler::pn, L_copy_byte); | |
1292 __ delayed()->mov(G0, offset); | |
1293 | |
1294 if (aligned) { | |
1295 // 'aligned' == true when it is known statically during compilation | |
1296 // of this arraycopy call site that both 'from' and 'to' addresses | |
1297 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
1298 // | |
1299 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
1300 // and 8 bytes - in 64-bits VM. So we do it only for 32-bits VM | |
1301 // | |
1302 #ifndef _LP64 | |
1303 // copy a 4-bytes word if necessary to align 'to' to 8 bytes | |
1304 __ andcc(to, 7, G0); | |
1305 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment); | |
1306 __ delayed()->ld(from, 0, O3); | |
1307 __ inc(from, 4); | |
1308 __ inc(to, 4); | |
1309 __ dec(count, 4); | |
1310 __ st(O3, to, -4); | |
1311 __ BIND(L_skip_alignment); | |
1312 #endif | |
1313 } else { | |
1314 // copy bytes to align 'to' on 8 byte boundary | |
1315 __ andcc(to, 7, G1); // misaligned bytes | |
1316 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1317 __ delayed()->neg(G1); | |
1318 __ inc(G1, 8); // bytes need to copy to next 8-bytes alignment | |
1319 __ sub(count, G1, count); | |
1320 __ BIND(L_align); | |
1321 __ ldub(from, 0, O3); | |
1322 __ deccc(G1); | |
1323 __ inc(from); | |
1324 __ stb(O3, to, 0); | |
1325 __ br(Assembler::notZero, false, Assembler::pt, L_align); | |
1326 __ delayed()->inc(to); | |
1327 __ BIND(L_skip_alignment); | |
1328 } | |
1329 #ifdef _LP64 | |
1330 if (!aligned) | |
1331 #endif | |
1332 { | |
1333 // Copy with shift 16 bytes per iteration if arrays do not have | |
1334 // the same alignment mod 8, otherwise fall through to the next | |
1335 // code for aligned copy. | |
1336 // The compare above (count >= 23) guarantes 'count' >= 16 bytes. | |
1337 // Also jump over aligned copy after the copy with shift completed. | |
1338 | |
1339 copy_16_bytes_forward_with_shift(from, to, count, 16, L_copy_byte); | |
1340 } | |
1341 | |
1342 // Both array are 8 bytes aligned, copy 16 bytes at a time | |
1343 __ and3(count, 7, G4); // Save count | |
1344 __ srl(count, 3, count); | |
1345 generate_disjoint_long_copy_core(aligned); | |
1346 __ mov(G4, count); // Restore count | |
1347 | |
1348 // copy tailing bytes | |
1349 __ BIND(L_copy_byte); | |
1350 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
1351 __ delayed()->nop(); | |
1352 __ align(16); | |
1353 __ BIND(L_copy_byte_loop); | |
1354 __ ldub(from, offset, O3); | |
1355 __ deccc(count); | |
1356 __ stb(O3, to, offset); | |
1357 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_byte_loop); | |
1358 __ delayed()->inc(offset); | |
1359 | |
1360 __ BIND(L_exit); | |
1361 // O3, O4 are used as temp registers | |
1362 inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr, O3, O4); | |
1363 __ retl(); | |
1364 __ delayed()->mov(G0, O0); // return 0 | |
1365 return start; | |
1366 } | |
1367 | |
1368 // | |
1369 // Generate stub for conjoint byte copy. If "aligned" is true, the | |
1370 // "from" and "to" addresses are assumed to be heapword aligned. | |
1371 // | |
1372 // Arguments for generated stub: | |
1373 // from: O0 | |
1374 // to: O1 | |
1375 // count: O2 treated as signed | |
1376 // | |
1377 address generate_conjoint_byte_copy(bool aligned, const char * name) { | |
1378 // Do reverse copy. | |
1379 | |
1380 __ align(CodeEntryAlignment); | |
1381 StubCodeMark mark(this, "StubRoutines", name); | |
1382 address start = __ pc(); | |
1383 address nooverlap_target = aligned ? | |
1384 StubRoutines::arrayof_jbyte_disjoint_arraycopy() : | |
1385 disjoint_byte_copy_entry; | |
1386 | |
1387 Label L_skip_alignment, L_align, L_aligned_copy; | |
1388 Label L_copy_byte, L_copy_byte_loop, L_exit; | |
1389 | |
1390 const Register from = O0; // source array address | |
1391 const Register to = O1; // destination array address | |
1392 const Register count = O2; // elements count | |
1393 const Register end_from = from; // source array end address | |
1394 const Register end_to = to; // destination array end address | |
1395 | |
1396 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1397 | |
1398 if (!aligned) byte_copy_entry = __ pc(); | |
1399 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
1400 if (!aligned) BLOCK_COMMENT("Entry:"); | |
1401 | |
1402 array_overlap_test(nooverlap_target, 0); | |
1403 | |
1404 __ add(to, count, end_to); // offset after last copied element | |
1405 | |
1406 // for short arrays, just do single element copy | |
1407 __ cmp(count, 23); // 16 + 7 | |
1408 __ brx(Assembler::less, false, Assembler::pn, L_copy_byte); | |
1409 __ delayed()->add(from, count, end_from); | |
1410 | |
1411 { | |
1412 // Align end of arrays since they could be not aligned even | |
1413 // when arrays itself are aligned. | |
1414 | |
1415 // copy bytes to align 'end_to' on 8 byte boundary | |
1416 __ andcc(end_to, 7, G1); // misaligned bytes | |
1417 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1418 __ delayed()->nop(); | |
1419 __ sub(count, G1, count); | |
1420 __ BIND(L_align); | |
1421 __ dec(end_from); | |
1422 __ dec(end_to); | |
1423 __ ldub(end_from, 0, O3); | |
1424 __ deccc(G1); | |
1425 __ brx(Assembler::notZero, false, Assembler::pt, L_align); | |
1426 __ delayed()->stb(O3, end_to, 0); | |
1427 __ BIND(L_skip_alignment); | |
1428 } | |
1429 #ifdef _LP64 | |
1430 if (aligned) { | |
1431 // Both arrays are aligned to 8-bytes in 64-bits VM. | |
1432 // The 'count' is decremented in copy_16_bytes_backward_with_shift() | |
1433 // in unaligned case. | |
1434 __ dec(count, 16); | |
1435 } else | |
1436 #endif | |
1437 { | |
1438 // Copy with shift 16 bytes per iteration if arrays do not have | |
1439 // the same alignment mod 8, otherwise jump to the next | |
1440 // code for aligned copy (and substracting 16 from 'count' before jump). | |
1441 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
1442 // Also jump over aligned copy after the copy with shift completed. | |
1443 | |
1444 copy_16_bytes_backward_with_shift(end_from, end_to, count, 16, | |
1445 L_aligned_copy, L_copy_byte); | |
1446 } | |
1447 // copy 4 elements (16 bytes) at a time | |
1448 __ align(16); | |
1449 __ BIND(L_aligned_copy); | |
1450 __ dec(end_from, 16); | |
1451 __ ldx(end_from, 8, O3); | |
1452 __ ldx(end_from, 0, O4); | |
1453 __ dec(end_to, 16); | |
1454 __ deccc(count, 16); | |
1455 __ stx(O3, end_to, 8); | |
1456 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
1457 __ delayed()->stx(O4, end_to, 0); | |
1458 __ inc(count, 16); | |
1459 | |
1460 // copy 1 element (2 bytes) at a time | |
1461 __ BIND(L_copy_byte); | |
1462 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
1463 __ delayed()->nop(); | |
1464 __ align(16); | |
1465 __ BIND(L_copy_byte_loop); | |
1466 __ dec(end_from); | |
1467 __ dec(end_to); | |
1468 __ ldub(end_from, 0, O4); | |
1469 __ deccc(count); | |
1470 __ brx(Assembler::greater, false, Assembler::pt, L_copy_byte_loop); | |
1471 __ delayed()->stb(O4, end_to, 0); | |
1472 | |
1473 __ BIND(L_exit); | |
1474 // O3, O4 are used as temp registers | |
1475 inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr, O3, O4); | |
1476 __ retl(); | |
1477 __ delayed()->mov(G0, O0); // return 0 | |
1478 return start; | |
1479 } | |
1480 | |
1481 // | |
1482 // Generate stub for disjoint short copy. If "aligned" is true, the | |
1483 // "from" and "to" addresses are assumed to be heapword aligned. | |
1484 // | |
1485 // Arguments for generated stub: | |
1486 // from: O0 | |
1487 // to: O1 | |
1488 // count: O2 treated as signed | |
1489 // | |
1490 address generate_disjoint_short_copy(bool aligned, const char * name) { | |
1491 __ align(CodeEntryAlignment); | |
1492 StubCodeMark mark(this, "StubRoutines", name); | |
1493 address start = __ pc(); | |
1494 | |
1495 Label L_skip_alignment, L_skip_alignment2; | |
1496 Label L_copy_2_bytes, L_copy_2_bytes_loop, L_exit; | |
1497 | |
1498 const Register from = O0; // source array address | |
1499 const Register to = O1; // destination array address | |
1500 const Register count = O2; // elements count | |
1501 const Register offset = O5; // offset from start of arrays | |
1502 // O3, O4, G3, G4 are used as temp registers | |
1503 | |
1504 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1505 | |
1506 if (!aligned) disjoint_short_copy_entry = __ pc(); | |
1507 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
1508 if (!aligned) BLOCK_COMMENT("Entry:"); | |
1509 | |
1510 // for short arrays, just do single element copy | |
1511 __ cmp(count, 11); // 8 + 3 (22 bytes) | |
1512 __ brx(Assembler::less, false, Assembler::pn, L_copy_2_bytes); | |
1513 __ delayed()->mov(G0, offset); | |
1514 | |
1515 if (aligned) { | |
1516 // 'aligned' == true when it is known statically during compilation | |
1517 // of this arraycopy call site that both 'from' and 'to' addresses | |
1518 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
1519 // | |
1520 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
1521 // and 8 bytes - in 64-bits VM. | |
1522 // | |
1523 #ifndef _LP64 | |
1524 // copy a 2-elements word if necessary to align 'to' to 8 bytes | |
1525 __ andcc(to, 7, G0); | |
1526 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1527 __ delayed()->ld(from, 0, O3); | |
1528 __ inc(from, 4); | |
1529 __ inc(to, 4); | |
1530 __ dec(count, 2); | |
1531 __ st(O3, to, -4); | |
1532 __ BIND(L_skip_alignment); | |
1533 #endif | |
1534 } else { | |
1535 // copy 1 element if necessary to align 'to' on an 4 bytes | |
1536 __ andcc(to, 3, G0); | |
1537 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1538 __ delayed()->lduh(from, 0, O3); | |
1539 __ inc(from, 2); | |
1540 __ inc(to, 2); | |
1541 __ dec(count); | |
1542 __ sth(O3, to, -2); | |
1543 __ BIND(L_skip_alignment); | |
1544 | |
1545 // copy 2 elements to align 'to' on an 8 byte boundary | |
1546 __ andcc(to, 7, G0); | |
1547 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment2); | |
1548 __ delayed()->lduh(from, 0, O3); | |
1549 __ dec(count, 2); | |
1550 __ lduh(from, 2, O4); | |
1551 __ inc(from, 4); | |
1552 __ inc(to, 4); | |
1553 __ sth(O3, to, -4); | |
1554 __ sth(O4, to, -2); | |
1555 __ BIND(L_skip_alignment2); | |
1556 } | |
1557 #ifdef _LP64 | |
1558 if (!aligned) | |
1559 #endif | |
1560 { | |
1561 // Copy with shift 16 bytes per iteration if arrays do not have | |
1562 // the same alignment mod 8, otherwise fall through to the next | |
1563 // code for aligned copy. | |
1564 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
1565 // Also jump over aligned copy after the copy with shift completed. | |
1566 | |
1567 copy_16_bytes_forward_with_shift(from, to, count, 8, L_copy_2_bytes); | |
1568 } | |
1569 | |
1570 // Both array are 8 bytes aligned, copy 16 bytes at a time | |
1571 __ and3(count, 3, G4); // Save | |
1572 __ srl(count, 2, count); | |
1573 generate_disjoint_long_copy_core(aligned); | |
1574 __ mov(G4, count); // restore | |
1575 | |
1576 // copy 1 element at a time | |
1577 __ BIND(L_copy_2_bytes); | |
1578 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
1579 __ delayed()->nop(); | |
1580 __ align(16); | |
1581 __ BIND(L_copy_2_bytes_loop); | |
1582 __ lduh(from, offset, O3); | |
1583 __ deccc(count); | |
1584 __ sth(O3, to, offset); | |
1585 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_2_bytes_loop); | |
1586 __ delayed()->inc(offset, 2); | |
1587 | |
1588 __ BIND(L_exit); | |
1589 // O3, O4 are used as temp registers | |
1590 inc_counter_np(SharedRuntime::_jshort_array_copy_ctr, O3, O4); | |
1591 __ retl(); | |
1592 __ delayed()->mov(G0, O0); // return 0 | |
1593 return start; | |
1594 } | |
1595 | |
1596 // | |
1597 // Generate stub for conjoint short copy. If "aligned" is true, the | |
1598 // "from" and "to" addresses are assumed to be heapword aligned. | |
1599 // | |
1600 // Arguments for generated stub: | |
1601 // from: O0 | |
1602 // to: O1 | |
1603 // count: O2 treated as signed | |
1604 // | |
1605 address generate_conjoint_short_copy(bool aligned, const char * name) { | |
1606 // Do reverse copy. | |
1607 | |
1608 __ align(CodeEntryAlignment); | |
1609 StubCodeMark mark(this, "StubRoutines", name); | |
1610 address start = __ pc(); | |
1611 address nooverlap_target = aligned ? | |
1612 StubRoutines::arrayof_jshort_disjoint_arraycopy() : | |
1613 disjoint_short_copy_entry; | |
1614 | |
1615 Label L_skip_alignment, L_skip_alignment2, L_aligned_copy; | |
1616 Label L_copy_2_bytes, L_copy_2_bytes_loop, L_exit; | |
1617 | |
1618 const Register from = O0; // source array address | |
1619 const Register to = O1; // destination array address | |
1620 const Register count = O2; // elements count | |
1621 const Register end_from = from; // source array end address | |
1622 const Register end_to = to; // destination array end address | |
1623 | |
1624 const Register byte_count = O3; // bytes count to copy | |
1625 | |
1626 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1627 | |
1628 if (!aligned) short_copy_entry = __ pc(); | |
1629 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
1630 if (!aligned) BLOCK_COMMENT("Entry:"); | |
1631 | |
1632 array_overlap_test(nooverlap_target, 1); | |
1633 | |
1634 __ sllx(count, LogBytesPerShort, byte_count); | |
1635 __ add(to, byte_count, end_to); // offset after last copied element | |
1636 | |
1637 // for short arrays, just do single element copy | |
1638 __ cmp(count, 11); // 8 + 3 (22 bytes) | |
1639 __ brx(Assembler::less, false, Assembler::pn, L_copy_2_bytes); | |
1640 __ delayed()->add(from, byte_count, end_from); | |
1641 | |
1642 { | |
1643 // Align end of arrays since they could be not aligned even | |
1644 // when arrays itself are aligned. | |
1645 | |
1646 // copy 1 element if necessary to align 'end_to' on an 4 bytes | |
1647 __ andcc(end_to, 3, G0); | |
1648 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1649 __ delayed()->lduh(end_from, -2, O3); | |
1650 __ dec(end_from, 2); | |
1651 __ dec(end_to, 2); | |
1652 __ dec(count); | |
1653 __ sth(O3, end_to, 0); | |
1654 __ BIND(L_skip_alignment); | |
1655 | |
1656 // copy 2 elements to align 'end_to' on an 8 byte boundary | |
1657 __ andcc(end_to, 7, G0); | |
1658 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment2); | |
1659 __ delayed()->lduh(end_from, -2, O3); | |
1660 __ dec(count, 2); | |
1661 __ lduh(end_from, -4, O4); | |
1662 __ dec(end_from, 4); | |
1663 __ dec(end_to, 4); | |
1664 __ sth(O3, end_to, 2); | |
1665 __ sth(O4, end_to, 0); | |
1666 __ BIND(L_skip_alignment2); | |
1667 } | |
1668 #ifdef _LP64 | |
1669 if (aligned) { | |
1670 // Both arrays are aligned to 8-bytes in 64-bits VM. | |
1671 // The 'count' is decremented in copy_16_bytes_backward_with_shift() | |
1672 // in unaligned case. | |
1673 __ dec(count, 8); | |
1674 } else | |
1675 #endif | |
1676 { | |
1677 // Copy with shift 16 bytes per iteration if arrays do not have | |
1678 // the same alignment mod 8, otherwise jump to the next | |
1679 // code for aligned copy (and substracting 8 from 'count' before jump). | |
1680 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
1681 // Also jump over aligned copy after the copy with shift completed. | |
1682 | |
1683 copy_16_bytes_backward_with_shift(end_from, end_to, count, 8, | |
1684 L_aligned_copy, L_copy_2_bytes); | |
1685 } | |
1686 // copy 4 elements (16 bytes) at a time | |
1687 __ align(16); | |
1688 __ BIND(L_aligned_copy); | |
1689 __ dec(end_from, 16); | |
1690 __ ldx(end_from, 8, O3); | |
1691 __ ldx(end_from, 0, O4); | |
1692 __ dec(end_to, 16); | |
1693 __ deccc(count, 8); | |
1694 __ stx(O3, end_to, 8); | |
1695 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
1696 __ delayed()->stx(O4, end_to, 0); | |
1697 __ inc(count, 8); | |
1698 | |
1699 // copy 1 element (2 bytes) at a time | |
1700 __ BIND(L_copy_2_bytes); | |
1701 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
1702 __ delayed()->nop(); | |
1703 __ BIND(L_copy_2_bytes_loop); | |
1704 __ dec(end_from, 2); | |
1705 __ dec(end_to, 2); | |
1706 __ lduh(end_from, 0, O4); | |
1707 __ deccc(count); | |
1708 __ brx(Assembler::greater, false, Assembler::pt, L_copy_2_bytes_loop); | |
1709 __ delayed()->sth(O4, end_to, 0); | |
1710 | |
1711 __ BIND(L_exit); | |
1712 // O3, O4 are used as temp registers | |
1713 inc_counter_np(SharedRuntime::_jshort_array_copy_ctr, O3, O4); | |
1714 __ retl(); | |
1715 __ delayed()->mov(G0, O0); // return 0 | |
1716 return start; | |
1717 } | |
1718 | |
1719 // | |
1720 // Generate core code for disjoint int copy (and oop copy on 32-bit). | |
1721 // If "aligned" is true, the "from" and "to" addresses are assumed | |
1722 // to be heapword aligned. | |
1723 // | |
1724 // Arguments: | |
1725 // from: O0 | |
1726 // to: O1 | |
1727 // count: O2 treated as signed | |
1728 // | |
1729 void generate_disjoint_int_copy_core(bool aligned) { | |
1730 | |
1731 Label L_skip_alignment, L_aligned_copy; | |
1732 Label L_copy_16_bytes, L_copy_4_bytes, L_copy_4_bytes_loop, L_exit; | |
1733 | |
1734 const Register from = O0; // source array address | |
1735 const Register to = O1; // destination array address | |
1736 const Register count = O2; // elements count | |
1737 const Register offset = O5; // offset from start of arrays | |
1738 // O3, O4, G3, G4 are used as temp registers | |
1739 | |
1740 // 'aligned' == true when it is known statically during compilation | |
1741 // of this arraycopy call site that both 'from' and 'to' addresses | |
1742 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
1743 // | |
1744 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
1745 // and 8 bytes - in 64-bits VM. | |
1746 // | |
1747 #ifdef _LP64 | |
1748 if (!aligned) | |
1749 #endif | |
1750 { | |
1751 // The next check could be put under 'ifndef' since the code in | |
1752 // generate_disjoint_long_copy_core() has own checks and set 'offset'. | |
1753 | |
1754 // for short arrays, just do single element copy | |
1755 __ cmp(count, 5); // 4 + 1 (20 bytes) | |
1756 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_4_bytes); | |
1757 __ delayed()->mov(G0, offset); | |
1758 | |
1759 // copy 1 element to align 'to' on an 8 byte boundary | |
1760 __ andcc(to, 7, G0); | |
1761 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1762 __ delayed()->ld(from, 0, O3); | |
1763 __ inc(from, 4); | |
1764 __ inc(to, 4); | |
1765 __ dec(count); | |
1766 __ st(O3, to, -4); | |
1767 __ BIND(L_skip_alignment); | |
1768 | |
1769 // if arrays have same alignment mod 8, do 4 elements copy | |
1770 __ andcc(from, 7, G0); | |
1771 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
1772 __ delayed()->ld(from, 0, O3); | |
1773 | |
1774 // | |
1775 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
1776 // to form 2 aligned 8-bytes chunks to store. | |
1777 // | |
1778 // copy_16_bytes_forward_with_shift() is not used here since this | |
1779 // code is more optimal. | |
1780 | |
1781 // copy with shift 4 elements (16 bytes) at a time | |
1782 __ dec(count, 4); // The cmp at the beginning guaranty count >= 4 | |
1783 | |
1784 __ align(16); | |
1785 __ BIND(L_copy_16_bytes); | |
1786 __ ldx(from, 4, O4); | |
1787 __ deccc(count, 4); // Can we do next iteration after this one? | |
1788 __ ldx(from, 12, G4); | |
1789 __ inc(to, 16); | |
1790 __ inc(from, 16); | |
1791 __ sllx(O3, 32, O3); | |
1792 __ srlx(O4, 32, G3); | |
1793 __ bset(G3, O3); | |
1794 __ stx(O3, to, -16); | |
1795 __ sllx(O4, 32, O4); | |
1796 __ srlx(G4, 32, G3); | |
1797 __ bset(G3, O4); | |
1798 __ stx(O4, to, -8); | |
1799 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes); | |
1800 __ delayed()->mov(G4, O3); | |
1801 | |
1802 __ br(Assembler::always, false, Assembler::pt, L_copy_4_bytes); | |
1803 __ delayed()->inc(count, 4); // restore 'count' | |
1804 | |
1805 __ BIND(L_aligned_copy); | |
1806 } | |
1807 // copy 4 elements (16 bytes) at a time | |
1808 __ and3(count, 1, G4); // Save | |
1809 __ srl(count, 1, count); | |
1810 generate_disjoint_long_copy_core(aligned); | |
1811 __ mov(G4, count); // Restore | |
1812 | |
1813 // copy 1 element at a time | |
1814 __ BIND(L_copy_4_bytes); | |
1815 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
1816 __ delayed()->nop(); | |
1817 __ BIND(L_copy_4_bytes_loop); | |
1818 __ ld(from, offset, O3); | |
1819 __ deccc(count); | |
1820 __ st(O3, to, offset); | |
1821 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_4_bytes_loop); | |
1822 __ delayed()->inc(offset, 4); | |
1823 __ BIND(L_exit); | |
1824 } | |
1825 | |
1826 // | |
1827 // Generate stub for disjoint int copy. If "aligned" is true, the | |
1828 // "from" and "to" addresses are assumed to be heapword aligned. | |
1829 // | |
1830 // Arguments for generated stub: | |
1831 // from: O0 | |
1832 // to: O1 | |
1833 // count: O2 treated as signed | |
1834 // | |
1835 address generate_disjoint_int_copy(bool aligned, const char * name) { | |
1836 __ align(CodeEntryAlignment); | |
1837 StubCodeMark mark(this, "StubRoutines", name); | |
1838 address start = __ pc(); | |
1839 | |
1840 const Register count = O2; | |
1841 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1842 | |
1843 if (!aligned) disjoint_int_copy_entry = __ pc(); | |
1844 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
1845 if (!aligned) BLOCK_COMMENT("Entry:"); | |
1846 | |
1847 generate_disjoint_int_copy_core(aligned); | |
1848 | |
1849 // O3, O4 are used as temp registers | |
1850 inc_counter_np(SharedRuntime::_jint_array_copy_ctr, O3, O4); | |
1851 __ retl(); | |
1852 __ delayed()->mov(G0, O0); // return 0 | |
1853 return start; | |
1854 } | |
1855 | |
1856 // | |
1857 // Generate core code for conjoint int copy (and oop copy on 32-bit). | |
1858 // If "aligned" is true, the "from" and "to" addresses are assumed | |
1859 // to be heapword aligned. | |
1860 // | |
1861 // Arguments: | |
1862 // from: O0 | |
1863 // to: O1 | |
1864 // count: O2 treated as signed | |
1865 // | |
1866 void generate_conjoint_int_copy_core(bool aligned) { | |
1867 // Do reverse copy. | |
1868 | |
1869 Label L_skip_alignment, L_aligned_copy; | |
1870 Label L_copy_16_bytes, L_copy_4_bytes, L_copy_4_bytes_loop, L_exit; | |
1871 | |
1872 const Register from = O0; // source array address | |
1873 const Register to = O1; // destination array address | |
1874 const Register count = O2; // elements count | |
1875 const Register end_from = from; // source array end address | |
1876 const Register end_to = to; // destination array end address | |
1877 // O3, O4, O5, G3 are used as temp registers | |
1878 | |
1879 const Register byte_count = O3; // bytes count to copy | |
1880 | |
1881 __ sllx(count, LogBytesPerInt, byte_count); | |
1882 __ add(to, byte_count, end_to); // offset after last copied element | |
1883 | |
1884 __ cmp(count, 5); // for short arrays, just do single element copy | |
1885 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_4_bytes); | |
1886 __ delayed()->add(from, byte_count, end_from); | |
1887 | |
1888 // copy 1 element to align 'to' on an 8 byte boundary | |
1889 __ andcc(end_to, 7, G0); | |
1890 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1891 __ delayed()->nop(); | |
1892 __ dec(count); | |
1893 __ dec(end_from, 4); | |
1894 __ dec(end_to, 4); | |
1895 __ ld(end_from, 0, O4); | |
1896 __ st(O4, end_to, 0); | |
1897 __ BIND(L_skip_alignment); | |
1898 | |
1899 // Check if 'end_from' and 'end_to' has the same alignment. | |
1900 __ andcc(end_from, 7, G0); | |
1901 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
1902 __ delayed()->dec(count, 4); // The cmp at the start guaranty cnt >= 4 | |
1903 | |
1904 // copy with shift 4 elements (16 bytes) at a time | |
1905 // | |
1906 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
1907 // to form 2 aligned 8-bytes chunks to store. | |
1908 // | |
1909 __ ldx(end_from, -4, O3); | |
1910 __ align(16); | |
1911 __ BIND(L_copy_16_bytes); | |
1912 __ ldx(end_from, -12, O4); | |
1913 __ deccc(count, 4); | |
1914 __ ldx(end_from, -20, O5); | |
1915 __ dec(end_to, 16); | |
1916 __ dec(end_from, 16); | |
1917 __ srlx(O3, 32, O3); | |
1918 __ sllx(O4, 32, G3); | |
1919 __ bset(G3, O3); | |
1920 __ stx(O3, end_to, 8); | |
1921 __ srlx(O4, 32, O4); | |
1922 __ sllx(O5, 32, G3); | |
1923 __ bset(O4, G3); | |
1924 __ stx(G3, end_to, 0); | |
1925 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes); | |
1926 __ delayed()->mov(O5, O3); | |
1927 | |
1928 __ br(Assembler::always, false, Assembler::pt, L_copy_4_bytes); | |
1929 __ delayed()->inc(count, 4); | |
1930 | |
1931 // copy 4 elements (16 bytes) at a time | |
1932 __ align(16); | |
1933 __ BIND(L_aligned_copy); | |
1934 __ dec(end_from, 16); | |
1935 __ ldx(end_from, 8, O3); | |
1936 __ ldx(end_from, 0, O4); | |
1937 __ dec(end_to, 16); | |
1938 __ deccc(count, 4); | |
1939 __ stx(O3, end_to, 8); | |
1940 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
1941 __ delayed()->stx(O4, end_to, 0); | |
1942 __ inc(count, 4); | |
1943 | |
1944 // copy 1 element (4 bytes) at a time | |
1945 __ BIND(L_copy_4_bytes); | |
1946 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
1947 __ delayed()->nop(); | |
1948 __ BIND(L_copy_4_bytes_loop); | |
1949 __ dec(end_from, 4); | |
1950 __ dec(end_to, 4); | |
1951 __ ld(end_from, 0, O4); | |
1952 __ deccc(count); | |
1953 __ brx(Assembler::greater, false, Assembler::pt, L_copy_4_bytes_loop); | |
1954 __ delayed()->st(O4, end_to, 0); | |
1955 __ BIND(L_exit); | |
1956 } | |
1957 | |
1958 // | |
1959 // Generate stub for conjoint int copy. If "aligned" is true, the | |
1960 // "from" and "to" addresses are assumed to be heapword aligned. | |
1961 // | |
1962 // Arguments for generated stub: | |
1963 // from: O0 | |
1964 // to: O1 | |
1965 // count: O2 treated as signed | |
1966 // | |
1967 address generate_conjoint_int_copy(bool aligned, const char * name) { | |
1968 __ align(CodeEntryAlignment); | |
1969 StubCodeMark mark(this, "StubRoutines", name); | |
1970 address start = __ pc(); | |
1971 | |
1972 address nooverlap_target = aligned ? | |
1973 StubRoutines::arrayof_jint_disjoint_arraycopy() : | |
1974 disjoint_int_copy_entry; | |
1975 | |
1976 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
1977 | |
1978 if (!aligned) int_copy_entry = __ pc(); | |
1979 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
1980 if (!aligned) BLOCK_COMMENT("Entry:"); | |
1981 | |
1982 array_overlap_test(nooverlap_target, 2); | |
1983 | |
1984 generate_conjoint_int_copy_core(aligned); | |
1985 | |
1986 // O3, O4 are used as temp registers | |
1987 inc_counter_np(SharedRuntime::_jint_array_copy_ctr, O3, O4); | |
1988 __ retl(); | |
1989 __ delayed()->mov(G0, O0); // return 0 | |
1990 return start; | |
1991 } | |
1992 | |
1993 // | |
1994 // Generate core code for disjoint long copy (and oop copy on 64-bit). | |
1995 // "aligned" is ignored, because we must make the stronger | |
1996 // assumption that both addresses are always 64-bit aligned. | |
1997 // | |
1998 // Arguments: | |
1999 // from: O0 | |
2000 // to: O1 | |
2001 // count: O2 treated as signed | |
2002 // | |
1364
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2003 // count -= 2; |
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2004 // if ( count >= 0 ) { // >= 2 elements |
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2005 // if ( count > 6) { // >= 8 elements |
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2006 // count -= 6; // original count - 8 |
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2007 // do { |
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2008 // copy_8_elements; |
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2009 // count -= 8; |
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2010 // } while ( count >= 0 ); |
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2011 // count += 6; |
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2012 // } |
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2013 // if ( count >= 0 ) { // >= 2 elements |
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2014 // do { |
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2015 // copy_2_elements; |
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2016 // } while ( (count=count-2) >= 0 ); |
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2017 // } |
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2018 // } |
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2019 // count += 2; |
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2020 // if ( count != 0 ) { // 1 element left |
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2021 // copy_1_element; |
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2022 // } |
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2023 // |
0 | 2024 void generate_disjoint_long_copy_core(bool aligned) { |
2025 Label L_copy_8_bytes, L_copy_16_bytes, L_exit; | |
2026 const Register from = O0; // source array address | |
2027 const Register to = O1; // destination array address | |
2028 const Register count = O2; // elements count | |
2029 const Register offset0 = O4; // element offset | |
2030 const Register offset8 = O5; // next element offset | |
2031 | |
2032 __ deccc(count, 2); | |
2033 __ mov(G0, offset0); // offset from start of arrays (0) | |
2034 __ brx(Assembler::negative, false, Assembler::pn, L_copy_8_bytes ); | |
2035 __ delayed()->add(offset0, 8, offset8); | |
1364
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2036 |
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2037 // Copy by 64 bytes chunks |
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2038 Label L_copy_64_bytes; |
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2039 const Register from64 = O3; // source address |
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2040 const Register to64 = G3; // destination address |
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2041 __ subcc(count, 6, O3); |
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2042 __ brx(Assembler::negative, false, Assembler::pt, L_copy_16_bytes ); |
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2043 __ delayed()->mov(to, to64); |
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2044 // Now we can use O4(offset0), O5(offset8) as temps |
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2045 __ mov(O3, count); |
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2046 __ mov(from, from64); |
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2047 |
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2048 __ align(16); |
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2049 __ BIND(L_copy_64_bytes); |
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2050 for( int off = 0; off < 64; off += 16 ) { |
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2051 __ ldx(from64, off+0, O4); |
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2052 __ ldx(from64, off+8, O5); |
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2053 __ stx(O4, to64, off+0); |
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2054 __ stx(O5, to64, off+8); |
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2055 } |
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2056 __ deccc(count, 8); |
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2057 __ inc(from64, 64); |
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2058 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_64_bytes); |
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2059 __ delayed()->inc(to64, 64); |
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2060 |
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2061 // Restore O4(offset0), O5(offset8) |
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2062 __ sub(from64, from, offset0); |
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2063 __ inccc(count, 6); |
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2064 __ brx(Assembler::negative, false, Assembler::pn, L_copy_8_bytes ); |
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2065 __ delayed()->add(offset0, 8, offset8); |
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2066 |
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2067 // Copy by 16 bytes chunks |
0 | 2068 __ align(16); |
2069 __ BIND(L_copy_16_bytes); | |
2070 __ ldx(from, offset0, O3); | |
2071 __ ldx(from, offset8, G3); | |
2072 __ deccc(count, 2); | |
2073 __ stx(O3, to, offset0); | |
2074 __ inc(offset0, 16); | |
2075 __ stx(G3, to, offset8); | |
2076 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes); | |
2077 __ delayed()->inc(offset8, 16); | |
2078 | |
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2079 // Copy last 8 bytes |
0 | 2080 __ BIND(L_copy_8_bytes); |
2081 __ inccc(count, 2); | |
2082 __ brx(Assembler::zero, true, Assembler::pn, L_exit ); | |
2083 __ delayed()->mov(offset0, offset8); // Set O5 used by other stubs | |
2084 __ ldx(from, offset0, O3); | |
2085 __ stx(O3, to, offset0); | |
2086 __ BIND(L_exit); | |
2087 } | |
2088 | |
2089 // | |
2090 // Generate stub for disjoint long copy. | |
2091 // "aligned" is ignored, because we must make the stronger | |
2092 // assumption that both addresses are always 64-bit aligned. | |
2093 // | |
2094 // Arguments for generated stub: | |
2095 // from: O0 | |
2096 // to: O1 | |
2097 // count: O2 treated as signed | |
2098 // | |
2099 address generate_disjoint_long_copy(bool aligned, const char * name) { | |
2100 __ align(CodeEntryAlignment); | |
2101 StubCodeMark mark(this, "StubRoutines", name); | |
2102 address start = __ pc(); | |
2103 | |
2104 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
2105 | |
2106 if (!aligned) disjoint_long_copy_entry = __ pc(); | |
2107 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
2108 if (!aligned) BLOCK_COMMENT("Entry:"); | |
2109 | |
2110 generate_disjoint_long_copy_core(aligned); | |
2111 | |
2112 // O3, O4 are used as temp registers | |
2113 inc_counter_np(SharedRuntime::_jlong_array_copy_ctr, O3, O4); | |
2114 __ retl(); | |
2115 __ delayed()->mov(G0, O0); // return 0 | |
2116 return start; | |
2117 } | |
2118 | |
2119 // | |
2120 // Generate core code for conjoint long copy (and oop copy on 64-bit). | |
2121 // "aligned" is ignored, because we must make the stronger | |
2122 // assumption that both addresses are always 64-bit aligned. | |
2123 // | |
2124 // Arguments: | |
2125 // from: O0 | |
2126 // to: O1 | |
2127 // count: O2 treated as signed | |
2128 // | |
2129 void generate_conjoint_long_copy_core(bool aligned) { | |
2130 // Do reverse copy. | |
2131 Label L_copy_8_bytes, L_copy_16_bytes, L_exit; | |
2132 const Register from = O0; // source array address | |
2133 const Register to = O1; // destination array address | |
2134 const Register count = O2; // elements count | |
2135 const Register offset8 = O4; // element offset | |
2136 const Register offset0 = O5; // previous element offset | |
2137 | |
2138 __ subcc(count, 1, count); | |
2139 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_8_bytes ); | |
2140 __ delayed()->sllx(count, LogBytesPerLong, offset8); | |
2141 __ sub(offset8, 8, offset0); | |
2142 __ align(16); | |
2143 __ BIND(L_copy_16_bytes); | |
2144 __ ldx(from, offset8, O2); | |
2145 __ ldx(from, offset0, O3); | |
2146 __ stx(O2, to, offset8); | |
2147 __ deccc(offset8, 16); // use offset8 as counter | |
2148 __ stx(O3, to, offset0); | |
2149 __ brx(Assembler::greater, false, Assembler::pt, L_copy_16_bytes); | |
2150 __ delayed()->dec(offset0, 16); | |
2151 | |
2152 __ BIND(L_copy_8_bytes); | |
2153 __ brx(Assembler::negative, false, Assembler::pn, L_exit ); | |
2154 __ delayed()->nop(); | |
2155 __ ldx(from, 0, O3); | |
2156 __ stx(O3, to, 0); | |
2157 __ BIND(L_exit); | |
2158 } | |
2159 | |
2160 // Generate stub for conjoint long copy. | |
2161 // "aligned" is ignored, because we must make the stronger | |
2162 // assumption that both addresses are always 64-bit aligned. | |
2163 // | |
2164 // Arguments for generated stub: | |
2165 // from: O0 | |
2166 // to: O1 | |
2167 // count: O2 treated as signed | |
2168 // | |
2169 address generate_conjoint_long_copy(bool aligned, const char * name) { | |
2170 __ align(CodeEntryAlignment); | |
2171 StubCodeMark mark(this, "StubRoutines", name); | |
2172 address start = __ pc(); | |
2173 | |
2174 assert(!aligned, "usage"); | |
2175 address nooverlap_target = disjoint_long_copy_entry; | |
2176 | |
2177 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
2178 | |
2179 if (!aligned) long_copy_entry = __ pc(); | |
2180 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
2181 if (!aligned) BLOCK_COMMENT("Entry:"); | |
2182 | |
2183 array_overlap_test(nooverlap_target, 3); | |
2184 | |
2185 generate_conjoint_long_copy_core(aligned); | |
2186 | |
2187 // O3, O4 are used as temp registers | |
2188 inc_counter_np(SharedRuntime::_jlong_array_copy_ctr, O3, O4); | |
2189 __ retl(); | |
2190 __ delayed()->mov(G0, O0); // return 0 | |
2191 return start; | |
2192 } | |
2193 | |
2194 // Generate stub for disjoint oop copy. If "aligned" is true, the | |
2195 // "from" and "to" addresses are assumed to be heapword aligned. | |
2196 // | |
2197 // Arguments for generated stub: | |
2198 // from: O0 | |
2199 // to: O1 | |
2200 // count: O2 treated as signed | |
2201 // | |
2202 address generate_disjoint_oop_copy(bool aligned, const char * name) { | |
2203 | |
2204 const Register from = O0; // source array address | |
2205 const Register to = O1; // destination array address | |
2206 const Register count = O2; // elements count | |
2207 | |
2208 __ align(CodeEntryAlignment); | |
2209 StubCodeMark mark(this, "StubRoutines", name); | |
2210 address start = __ pc(); | |
2211 | |
2212 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
2213 | |
2214 if (!aligned) disjoint_oop_copy_entry = __ pc(); | |
2215 // caller can pass a 64-bit byte count here | |
2216 if (!aligned) BLOCK_COMMENT("Entry:"); | |
2217 | |
2218 // save arguments for barrier generation | |
2219 __ mov(to, G1); | |
2220 __ mov(count, G5); | |
2221 gen_write_ref_array_pre_barrier(G1, G5); | |
2222 #ifdef _LP64 | |
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2223 assert_clean_int(count, O3); // Make sure 'count' is clean int. |
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2224 if (UseCompressedOops) { |
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2225 generate_disjoint_int_copy_core(aligned); |
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2226 } else { |
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2227 generate_disjoint_long_copy_core(aligned); |
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2228 } |
0 | 2229 #else |
2230 generate_disjoint_int_copy_core(aligned); | |
2231 #endif | |
2232 // O0 is used as temp register | |
2233 gen_write_ref_array_post_barrier(G1, G5, O0); | |
2234 | |
2235 // O3, O4 are used as temp registers | |
2236 inc_counter_np(SharedRuntime::_oop_array_copy_ctr, O3, O4); | |
2237 __ retl(); | |
2238 __ delayed()->mov(G0, O0); // return 0 | |
2239 return start; | |
2240 } | |
2241 | |
2242 // Generate stub for conjoint oop copy. If "aligned" is true, the | |
2243 // "from" and "to" addresses are assumed to be heapword aligned. | |
2244 // | |
2245 // Arguments for generated stub: | |
2246 // from: O0 | |
2247 // to: O1 | |
2248 // count: O2 treated as signed | |
2249 // | |
2250 address generate_conjoint_oop_copy(bool aligned, const char * name) { | |
2251 | |
2252 const Register from = O0; // source array address | |
2253 const Register to = O1; // destination array address | |
2254 const Register count = O2; // elements count | |
2255 | |
2256 __ align(CodeEntryAlignment); | |
2257 StubCodeMark mark(this, "StubRoutines", name); | |
2258 address start = __ pc(); | |
2259 | |
2260 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
2261 | |
2262 if (!aligned) oop_copy_entry = __ pc(); | |
2263 // caller can pass a 64-bit byte count here | |
2264 if (!aligned) BLOCK_COMMENT("Entry:"); | |
2265 | |
2266 // save arguments for barrier generation | |
2267 __ mov(to, G1); | |
2268 __ mov(count, G5); | |
2269 | |
2270 gen_write_ref_array_pre_barrier(G1, G5); | |
2271 | |
2272 address nooverlap_target = aligned ? | |
2273 StubRoutines::arrayof_oop_disjoint_arraycopy() : | |
2274 disjoint_oop_copy_entry; | |
2275 | |
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2276 array_overlap_test(nooverlap_target, LogBytesPerHeapOop); |
0 | 2277 |
2278 #ifdef _LP64 | |
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2279 if (UseCompressedOops) { |
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2280 generate_conjoint_int_copy_core(aligned); |
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2281 } else { |
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2282 generate_conjoint_long_copy_core(aligned); |
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2283 } |
0 | 2284 #else |
2285 generate_conjoint_int_copy_core(aligned); | |
2286 #endif | |
2287 | |
2288 // O0 is used as temp register | |
2289 gen_write_ref_array_post_barrier(G1, G5, O0); | |
2290 | |
2291 // O3, O4 are used as temp registers | |
2292 inc_counter_np(SharedRuntime::_oop_array_copy_ctr, O3, O4); | |
2293 __ retl(); | |
2294 __ delayed()->mov(G0, O0); // return 0 | |
2295 return start; | |
2296 } | |
2297 | |
2298 | |
2299 // Helper for generating a dynamic type check. | |
2300 // Smashes only the given temp registers. | |
2301 void generate_type_check(Register sub_klass, | |
2302 Register super_check_offset, | |
2303 Register super_klass, | |
2304 Register temp, | |
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2305 Label& L_success) { |
0 | 2306 assert_different_registers(sub_klass, super_check_offset, super_klass, temp); |
2307 | |
2308 BLOCK_COMMENT("type_check:"); | |
2309 | |
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2310 Label L_miss, L_pop_to_miss; |
0 | 2311 |
2312 assert_clean_int(super_check_offset, temp); | |
2313 | |
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2314 __ check_klass_subtype_fast_path(sub_klass, super_klass, temp, noreg, |
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2315 &L_success, &L_miss, NULL, |
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2316 super_check_offset); |
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2317 |
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2318 BLOCK_COMMENT("type_check_slow_path:"); |
0 | 2319 __ save_frame(0); |
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2320 __ check_klass_subtype_slow_path(sub_klass->after_save(), |
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2321 super_klass->after_save(), |
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2322 L0, L1, L2, L4, |
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2323 NULL, &L_pop_to_miss); |
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2324 __ ba(false, L_success); |
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2325 __ delayed()->restore(); |
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2326 |
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2327 __ bind(L_pop_to_miss); |
0 | 2328 __ restore(); |
2329 | |
2330 // Fall through on failure! | |
2331 __ BIND(L_miss); | |
2332 } | |
2333 | |
2334 | |
2335 // Generate stub for checked oop copy. | |
2336 // | |
2337 // Arguments for generated stub: | |
2338 // from: O0 | |
2339 // to: O1 | |
2340 // count: O2 treated as signed | |
2341 // ckoff: O3 (super_check_offset) | |
2342 // ckval: O4 (super_klass) | |
2343 // ret: O0 zero for success; (-1^K) where K is partial transfer count | |
2344 // | |
2345 address generate_checkcast_copy(const char* name) { | |
2346 | |
2347 const Register O0_from = O0; // source array address | |
2348 const Register O1_to = O1; // destination array address | |
2349 const Register O2_count = O2; // elements count | |
2350 const Register O3_ckoff = O3; // super_check_offset | |
2351 const Register O4_ckval = O4; // super_klass | |
2352 | |
2353 const Register O5_offset = O5; // loop var, with stride wordSize | |
2354 const Register G1_remain = G1; // loop var, with stride -1 | |
2355 const Register G3_oop = G3; // actual oop copied | |
2356 const Register G4_klass = G4; // oop._klass | |
2357 const Register G5_super = G5; // oop._klass._primary_supers[ckval] | |
2358 | |
2359 __ align(CodeEntryAlignment); | |
2360 StubCodeMark mark(this, "StubRoutines", name); | |
2361 address start = __ pc(); | |
2362 | |
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2363 gen_write_ref_array_pre_barrier(O1, O2); |
0 | 2364 |
2365 #ifdef ASSERT | |
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2366 // We sometimes save a frame (see generate_type_check below). |
0 | 2367 // If this will cause trouble, let's fail now instead of later. |
2368 __ save_frame(0); | |
2369 __ restore(); | |
2370 #endif | |
2371 | |
2372 #ifdef ASSERT | |
2373 // caller guarantees that the arrays really are different | |
2374 // otherwise, we would have to make conjoint checks | |
2375 { Label L; | |
2376 __ mov(O3, G1); // spill: overlap test smashes O3 | |
2377 __ mov(O4, G4); // spill: overlap test smashes O4 | |
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2378 array_overlap_test(L, LogBytesPerHeapOop); |
0 | 2379 __ stop("checkcast_copy within a single array"); |
2380 __ bind(L); | |
2381 __ mov(G1, O3); | |
2382 __ mov(G4, O4); | |
2383 } | |
2384 #endif //ASSERT | |
2385 | |
2386 assert_clean_int(O2_count, G1); // Make sure 'count' is clean int. | |
2387 | |
2388 checkcast_copy_entry = __ pc(); | |
2389 // caller can pass a 64-bit byte count here (from generic stub) | |
2390 BLOCK_COMMENT("Entry:"); | |
2391 | |
2392 Label load_element, store_element, do_card_marks, fail, done; | |
2393 __ addcc(O2_count, 0, G1_remain); // initialize loop index, and test it | |
2394 __ brx(Assembler::notZero, false, Assembler::pt, load_element); | |
2395 __ delayed()->mov(G0, O5_offset); // offset from start of arrays | |
2396 | |
2397 // Empty array: Nothing to do. | |
2398 inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr, O3, O4); | |
2399 __ retl(); | |
2400 __ delayed()->set(0, O0); // return 0 on (trivial) success | |
2401 | |
2402 // ======== begin loop ======== | |
2403 // (Loop is rotated; its entry is load_element.) | |
2404 // Loop variables: | |
2405 // (O5 = 0; ; O5 += wordSize) --- offset from src, dest arrays | |
2406 // (O2 = len; O2 != 0; O2--) --- number of oops *remaining* | |
2407 // G3, G4, G5 --- current oop, oop.klass, oop.klass.super | |
2408 __ align(16); | |
2409 | |
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2410 __ BIND(store_element); |
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2411 __ deccc(G1_remain); // decrement the count |
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2412 __ store_heap_oop(G3_oop, O1_to, O5_offset); // store the oop |
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2413 __ inc(O5_offset, heapOopSize); // step to next offset |
0 | 2414 __ brx(Assembler::zero, true, Assembler::pt, do_card_marks); |
2415 __ delayed()->set(0, O0); // return -1 on success | |
2416 | |
2417 // ======== loop entry is here ======== | |
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2418 __ BIND(load_element); |
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2419 __ load_heap_oop(O0_from, O5_offset, G3_oop); // load the oop |
0 | 2420 __ br_null(G3_oop, true, Assembler::pt, store_element); |
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2421 __ delayed()->nop(); |
0 | 2422 |
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2423 __ load_klass(G3_oop, G4_klass); // query the object klass |
0 | 2424 |
2425 generate_type_check(G4_klass, O3_ckoff, O4_ckval, G5_super, | |
2426 // branch to this on success: | |
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2427 store_element); |
0 | 2428 // ======== end loop ======== |
2429 | |
2430 // It was a real error; we must depend on the caller to finish the job. | |
2431 // Register G1 has number of *remaining* oops, O2 number of *total* oops. | |
2432 // Emit GC store barriers for the oops we have copied (O2 minus G1), | |
2433 // and report their number to the caller. | |
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2434 __ BIND(fail); |
0 | 2435 __ subcc(O2_count, G1_remain, O2_count); |
2436 __ brx(Assembler::zero, false, Assembler::pt, done); | |
2437 __ delayed()->not1(O2_count, O0); // report (-1^K) to caller | |
2438 | |
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2439 __ BIND(do_card_marks); |
0 | 2440 gen_write_ref_array_post_barrier(O1_to, O2_count, O3); // store check on O1[0..O2] |
2441 | |
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2442 __ BIND(done); |
0 | 2443 inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr, O3, O4); |
2444 __ retl(); | |
2445 __ delayed()->nop(); // return value in 00 | |
2446 | |
2447 return start; | |
2448 } | |
2449 | |
2450 | |
2451 // Generate 'unsafe' array copy stub | |
2452 // Though just as safe as the other stubs, it takes an unscaled | |
2453 // size_t argument instead of an element count. | |
2454 // | |
2455 // Arguments for generated stub: | |
2456 // from: O0 | |
2457 // to: O1 | |
2458 // count: O2 byte count, treated as ssize_t, can be zero | |
2459 // | |
2460 // Examines the alignment of the operands and dispatches | |
2461 // to a long, int, short, or byte copy loop. | |
2462 // | |
2463 address generate_unsafe_copy(const char* name) { | |
2464 | |
2465 const Register O0_from = O0; // source array address | |
2466 const Register O1_to = O1; // destination array address | |
2467 const Register O2_count = O2; // elements count | |
2468 | |
2469 const Register G1_bits = G1; // test copy of low bits | |
2470 | |
2471 __ align(CodeEntryAlignment); | |
2472 StubCodeMark mark(this, "StubRoutines", name); | |
2473 address start = __ pc(); | |
2474 | |
2475 // bump this on entry, not on exit: | |
2476 inc_counter_np(SharedRuntime::_unsafe_array_copy_ctr, G1, G3); | |
2477 | |
2478 __ or3(O0_from, O1_to, G1_bits); | |
2479 __ or3(O2_count, G1_bits, G1_bits); | |
2480 | |
2481 __ btst(BytesPerLong-1, G1_bits); | |
2482 __ br(Assembler::zero, true, Assembler::pt, | |
2483 long_copy_entry, relocInfo::runtime_call_type); | |
2484 // scale the count on the way out: | |
2485 __ delayed()->srax(O2_count, LogBytesPerLong, O2_count); | |
2486 | |
2487 __ btst(BytesPerInt-1, G1_bits); | |
2488 __ br(Assembler::zero, true, Assembler::pt, | |
2489 int_copy_entry, relocInfo::runtime_call_type); | |
2490 // scale the count on the way out: | |
2491 __ delayed()->srax(O2_count, LogBytesPerInt, O2_count); | |
2492 | |
2493 __ btst(BytesPerShort-1, G1_bits); | |
2494 __ br(Assembler::zero, true, Assembler::pt, | |
2495 short_copy_entry, relocInfo::runtime_call_type); | |
2496 // scale the count on the way out: | |
2497 __ delayed()->srax(O2_count, LogBytesPerShort, O2_count); | |
2498 | |
2499 __ br(Assembler::always, false, Assembler::pt, | |
2500 byte_copy_entry, relocInfo::runtime_call_type); | |
2501 __ delayed()->nop(); | |
2502 | |
2503 return start; | |
2504 } | |
2505 | |
2506 | |
2507 // Perform range checks on the proposed arraycopy. | |
2508 // Kills the two temps, but nothing else. | |
2509 // Also, clean the sign bits of src_pos and dst_pos. | |
2510 void arraycopy_range_checks(Register src, // source array oop (O0) | |
2511 Register src_pos, // source position (O1) | |
2512 Register dst, // destination array oo (O2) | |
2513 Register dst_pos, // destination position (O3) | |
2514 Register length, // length of copy (O4) | |
2515 Register temp1, Register temp2, | |
2516 Label& L_failed) { | |
2517 BLOCK_COMMENT("arraycopy_range_checks:"); | |
2518 | |
2519 // if (src_pos + length > arrayOop(src)->length() ) FAIL; | |
2520 | |
2521 const Register array_length = temp1; // scratch | |
2522 const Register end_pos = temp2; // scratch | |
2523 | |
2524 // Note: This next instruction may be in the delay slot of a branch: | |
2525 __ add(length, src_pos, end_pos); // src_pos + length | |
2526 __ lduw(src, arrayOopDesc::length_offset_in_bytes(), array_length); | |
2527 __ cmp(end_pos, array_length); | |
2528 __ br(Assembler::greater, false, Assembler::pn, L_failed); | |
2529 | |
2530 // if (dst_pos + length > arrayOop(dst)->length() ) FAIL; | |
2531 __ delayed()->add(length, dst_pos, end_pos); // dst_pos + length | |
2532 __ lduw(dst, arrayOopDesc::length_offset_in_bytes(), array_length); | |
2533 __ cmp(end_pos, array_length); | |
2534 __ br(Assembler::greater, false, Assembler::pn, L_failed); | |
2535 | |
2536 // Have to clean up high 32-bits of 'src_pos' and 'dst_pos'. | |
2537 // Move with sign extension can be used since they are positive. | |
2538 __ delayed()->signx(src_pos, src_pos); | |
2539 __ signx(dst_pos, dst_pos); | |
2540 | |
2541 BLOCK_COMMENT("arraycopy_range_checks done"); | |
2542 } | |
2543 | |
2544 | |
2545 // | |
2546 // Generate generic array copy stubs | |
2547 // | |
2548 // Input: | |
2549 // O0 - src oop | |
2550 // O1 - src_pos | |
2551 // O2 - dst oop | |
2552 // O3 - dst_pos | |
2553 // O4 - element count | |
2554 // | |
2555 // Output: | |
2556 // O0 == 0 - success | |
2557 // O0 == -1 - need to call System.arraycopy | |
2558 // | |
2559 address generate_generic_copy(const char *name) { | |
2560 | |
2561 Label L_failed, L_objArray; | |
2562 | |
2563 // Input registers | |
2564 const Register src = O0; // source array oop | |
2565 const Register src_pos = O1; // source position | |
2566 const Register dst = O2; // destination array oop | |
2567 const Register dst_pos = O3; // destination position | |
2568 const Register length = O4; // elements count | |
2569 | |
2570 // registers used as temp | |
2571 const Register G3_src_klass = G3; // source array klass | |
2572 const Register G4_dst_klass = G4; // destination array klass | |
2573 const Register G5_lh = G5; // layout handler | |
2574 const Register O5_temp = O5; | |
2575 | |
2576 __ align(CodeEntryAlignment); | |
2577 StubCodeMark mark(this, "StubRoutines", name); | |
2578 address start = __ pc(); | |
2579 | |
2580 // bump this on entry, not on exit: | |
2581 inc_counter_np(SharedRuntime::_generic_array_copy_ctr, G1, G3); | |
2582 | |
2583 // In principle, the int arguments could be dirty. | |
2584 //assert_clean_int(src_pos, G1); | |
2585 //assert_clean_int(dst_pos, G1); | |
2586 //assert_clean_int(length, G1); | |
2587 | |
2588 //----------------------------------------------------------------------- | |
2589 // Assembler stubs will be used for this call to arraycopy | |
2590 // if the following conditions are met: | |
2591 // | |
2592 // (1) src and dst must not be null. | |
2593 // (2) src_pos must not be negative. | |
2594 // (3) dst_pos must not be negative. | |
2595 // (4) length must not be negative. | |
2596 // (5) src klass and dst klass should be the same and not NULL. | |
2597 // (6) src and dst should be arrays. | |
2598 // (7) src_pos + length must not exceed length of src. | |
2599 // (8) dst_pos + length must not exceed length of dst. | |
2600 BLOCK_COMMENT("arraycopy initial argument checks"); | |
2601 | |
2602 // if (src == NULL) return -1; | |
2603 __ br_null(src, false, Assembler::pn, L_failed); | |
2604 | |
2605 // if (src_pos < 0) return -1; | |
2606 __ delayed()->tst(src_pos); | |
2607 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
2608 __ delayed()->nop(); | |
2609 | |
2610 // if (dst == NULL) return -1; | |
2611 __ br_null(dst, false, Assembler::pn, L_failed); | |
2612 | |
2613 // if (dst_pos < 0) return -1; | |
2614 __ delayed()->tst(dst_pos); | |
2615 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
2616 | |
2617 // if (length < 0) return -1; | |
2618 __ delayed()->tst(length); | |
2619 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
2620 | |
2621 BLOCK_COMMENT("arraycopy argument klass checks"); | |
2622 // get src->klass() | |
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2623 if (UseCompressedOops) { |
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2624 __ delayed()->nop(); // ??? not good |
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2625 __ load_klass(src, G3_src_klass); |
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2626 } else { |
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2627 __ delayed()->ld_ptr(src, oopDesc::klass_offset_in_bytes(), G3_src_klass); |
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2628 } |
0 | 2629 |
2630 #ifdef ASSERT | |
2631 // assert(src->klass() != NULL); | |
2632 BLOCK_COMMENT("assert klasses not null"); | |
2633 { Label L_a, L_b; | |
2634 __ br_notnull(G3_src_klass, false, Assembler::pt, L_b); // it is broken if klass is NULL | |
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2635 __ delayed()->nop(); |
0 | 2636 __ bind(L_a); |
2637 __ stop("broken null klass"); | |
2638 __ bind(L_b); | |
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2639 __ load_klass(dst, G4_dst_klass); |
0 | 2640 __ br_null(G4_dst_klass, false, Assembler::pn, L_a); // this would be broken also |
2641 __ delayed()->mov(G0, G4_dst_klass); // scribble the temp | |
2642 BLOCK_COMMENT("assert done"); | |
2643 } | |
2644 #endif | |
2645 | |
2646 // Load layout helper | |
2647 // | |
2648 // |array_tag| | header_size | element_type | |log2_element_size| | |
2649 // 32 30 24 16 8 2 0 | |
2650 // | |
2651 // array_tag: typeArray = 0x3, objArray = 0x2, non-array = 0x0 | |
2652 // | |
2653 | |
2654 int lh_offset = klassOopDesc::header_size() * HeapWordSize + | |
2655 Klass::layout_helper_offset_in_bytes(); | |
2656 | |
2657 // Load 32-bits signed value. Use br() instruction with it to check icc. | |
2658 __ lduw(G3_src_klass, lh_offset, G5_lh); | |
2659 | |
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2660 if (UseCompressedOops) { |
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2661 __ load_klass(dst, G4_dst_klass); |
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2662 } |
0 | 2663 // Handle objArrays completely differently... |
2664 juint objArray_lh = Klass::array_layout_helper(T_OBJECT); | |
2665 __ set(objArray_lh, O5_temp); | |
2666 __ cmp(G5_lh, O5_temp); | |
2667 __ br(Assembler::equal, false, Assembler::pt, L_objArray); | |
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2668 if (UseCompressedOops) { |
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2669 __ delayed()->nop(); |
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2670 } else { |
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2671 __ delayed()->ld_ptr(dst, oopDesc::klass_offset_in_bytes(), G4_dst_klass); |
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2672 } |
0 | 2673 |
2674 // if (src->klass() != dst->klass()) return -1; | |
2675 __ cmp(G3_src_klass, G4_dst_klass); | |
2676 __ brx(Assembler::notEqual, false, Assembler::pn, L_failed); | |
2677 __ delayed()->nop(); | |
2678 | |
2679 // if (!src->is_Array()) return -1; | |
2680 __ cmp(G5_lh, Klass::_lh_neutral_value); // < 0 | |
2681 __ br(Assembler::greaterEqual, false, Assembler::pn, L_failed); | |
2682 | |
2683 // At this point, it is known to be a typeArray (array_tag 0x3). | |
2684 #ifdef ASSERT | |
2685 __ delayed()->nop(); | |
2686 { Label L; | |
2687 jint lh_prim_tag_in_place = (Klass::_lh_array_tag_type_value << Klass::_lh_array_tag_shift); | |
2688 __ set(lh_prim_tag_in_place, O5_temp); | |
2689 __ cmp(G5_lh, O5_temp); | |
2690 __ br(Assembler::greaterEqual, false, Assembler::pt, L); | |
2691 __ delayed()->nop(); | |
2692 __ stop("must be a primitive array"); | |
2693 __ bind(L); | |
2694 } | |
2695 #else | |
2696 __ delayed(); // match next insn to prev branch | |
2697 #endif | |
2698 | |
2699 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
2700 O5_temp, G4_dst_klass, L_failed); | |
2701 | |
2702 // typeArrayKlass | |
2703 // | |
2704 // src_addr = (src + array_header_in_bytes()) + (src_pos << log2elemsize); | |
2705 // dst_addr = (dst + array_header_in_bytes()) + (dst_pos << log2elemsize); | |
2706 // | |
2707 | |
2708 const Register G4_offset = G4_dst_klass; // array offset | |
2709 const Register G3_elsize = G3_src_klass; // log2 element size | |
2710 | |
2711 __ srl(G5_lh, Klass::_lh_header_size_shift, G4_offset); | |
2712 __ and3(G4_offset, Klass::_lh_header_size_mask, G4_offset); // array_offset | |
2713 __ add(src, G4_offset, src); // src array offset | |
2714 __ add(dst, G4_offset, dst); // dst array offset | |
2715 __ and3(G5_lh, Klass::_lh_log2_element_size_mask, G3_elsize); // log2 element size | |
2716 | |
2717 // next registers should be set before the jump to corresponding stub | |
2718 const Register from = O0; // source array address | |
2719 const Register to = O1; // destination array address | |
2720 const Register count = O2; // elements count | |
2721 | |
2722 // 'from', 'to', 'count' registers should be set in this order | |
2723 // since they are the same as 'src', 'src_pos', 'dst'. | |
2724 | |
2725 BLOCK_COMMENT("scale indexes to element size"); | |
2726 __ sll_ptr(src_pos, G3_elsize, src_pos); | |
2727 __ sll_ptr(dst_pos, G3_elsize, dst_pos); | |
2728 __ add(src, src_pos, from); // src_addr | |
2729 __ add(dst, dst_pos, to); // dst_addr | |
2730 | |
2731 BLOCK_COMMENT("choose copy loop based on element size"); | |
2732 __ cmp(G3_elsize, 0); | |
2733 __ br(Assembler::equal,true,Assembler::pt,StubRoutines::_jbyte_arraycopy); | |
2734 __ delayed()->signx(length, count); // length | |
2735 | |
2736 __ cmp(G3_elsize, LogBytesPerShort); | |
2737 __ br(Assembler::equal,true,Assembler::pt,StubRoutines::_jshort_arraycopy); | |
2738 __ delayed()->signx(length, count); // length | |
2739 | |
2740 __ cmp(G3_elsize, LogBytesPerInt); | |
2741 __ br(Assembler::equal,true,Assembler::pt,StubRoutines::_jint_arraycopy); | |
2742 __ delayed()->signx(length, count); // length | |
2743 #ifdef ASSERT | |
2744 { Label L; | |
2745 __ cmp(G3_elsize, LogBytesPerLong); | |
2746 __ br(Assembler::equal, false, Assembler::pt, L); | |
2747 __ delayed()->nop(); | |
2748 __ stop("must be long copy, but elsize is wrong"); | |
2749 __ bind(L); | |
2750 } | |
2751 #endif | |
2752 __ br(Assembler::always,false,Assembler::pt,StubRoutines::_jlong_arraycopy); | |
2753 __ delayed()->signx(length, count); // length | |
2754 | |
2755 // objArrayKlass | |
2756 __ BIND(L_objArray); | |
2757 // live at this point: G3_src_klass, G4_dst_klass, src[_pos], dst[_pos], length | |
2758 | |
2759 Label L_plain_copy, L_checkcast_copy; | |
2760 // test array classes for subtyping | |
2761 __ cmp(G3_src_klass, G4_dst_klass); // usual case is exact equality | |
2762 __ brx(Assembler::notEqual, true, Assembler::pn, L_checkcast_copy); | |
2763 __ delayed()->lduw(G4_dst_klass, lh_offset, O5_temp); // hoisted from below | |
2764 | |
2765 // Identically typed arrays can be copied without element-wise checks. | |
2766 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
2767 O5_temp, G5_lh, L_failed); | |
2768 | |
2769 __ add(src, arrayOopDesc::base_offset_in_bytes(T_OBJECT), src); //src offset | |
2770 __ add(dst, arrayOopDesc::base_offset_in_bytes(T_OBJECT), dst); //dst offset | |
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2771 __ sll_ptr(src_pos, LogBytesPerHeapOop, src_pos); |
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2772 __ sll_ptr(dst_pos, LogBytesPerHeapOop, dst_pos); |
0 | 2773 __ add(src, src_pos, from); // src_addr |
2774 __ add(dst, dst_pos, to); // dst_addr | |
2775 __ BIND(L_plain_copy); | |
2776 __ br(Assembler::always, false, Assembler::pt,StubRoutines::_oop_arraycopy); | |
2777 __ delayed()->signx(length, count); // length | |
2778 | |
2779 __ BIND(L_checkcast_copy); | |
2780 // live at this point: G3_src_klass, G4_dst_klass | |
2781 { | |
2782 // Before looking at dst.length, make sure dst is also an objArray. | |
2783 // lduw(G4_dst_klass, lh_offset, O5_temp); // hoisted to delay slot | |
2784 __ cmp(G5_lh, O5_temp); | |
2785 __ br(Assembler::notEqual, false, Assembler::pn, L_failed); | |
2786 | |
2787 // It is safe to examine both src.length and dst.length. | |
2788 __ delayed(); // match next insn to prev branch | |
2789 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
2790 O5_temp, G5_lh, L_failed); | |
2791 | |
2792 // Marshal the base address arguments now, freeing registers. | |
2793 __ add(src, arrayOopDesc::base_offset_in_bytes(T_OBJECT), src); //src offset | |
2794 __ add(dst, arrayOopDesc::base_offset_in_bytes(T_OBJECT), dst); //dst offset | |
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2795 __ sll_ptr(src_pos, LogBytesPerHeapOop, src_pos); |
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2796 __ sll_ptr(dst_pos, LogBytesPerHeapOop, dst_pos); |
0 | 2797 __ add(src, src_pos, from); // src_addr |
2798 __ add(dst, dst_pos, to); // dst_addr | |
2799 __ signx(length, count); // length (reloaded) | |
2800 | |
2801 Register sco_temp = O3; // this register is free now | |
2802 assert_different_registers(from, to, count, sco_temp, | |
2803 G4_dst_klass, G3_src_klass); | |
2804 | |
2805 // Generate the type check. | |
2806 int sco_offset = (klassOopDesc::header_size() * HeapWordSize + | |
2807 Klass::super_check_offset_offset_in_bytes()); | |
2808 __ lduw(G4_dst_klass, sco_offset, sco_temp); | |
2809 generate_type_check(G3_src_klass, sco_temp, G4_dst_klass, | |
2810 O5_temp, L_plain_copy); | |
2811 | |
2812 // Fetch destination element klass from the objArrayKlass header. | |
2813 int ek_offset = (klassOopDesc::header_size() * HeapWordSize + | |
2814 objArrayKlass::element_klass_offset_in_bytes()); | |
2815 | |
2816 // the checkcast_copy loop needs two extra arguments: | |
2817 __ ld_ptr(G4_dst_klass, ek_offset, O4); // dest elem klass | |
2818 // lduw(O4, sco_offset, O3); // sco of elem klass | |
2819 | |
2820 __ br(Assembler::always, false, Assembler::pt, checkcast_copy_entry); | |
2821 __ delayed()->lduw(O4, sco_offset, O3); | |
2822 } | |
2823 | |
2824 __ BIND(L_failed); | |
2825 __ retl(); | |
2826 __ delayed()->sub(G0, 1, O0); // return -1 | |
2827 return start; | |
2828 } | |
2829 | |
2830 void generate_arraycopy_stubs() { | |
2831 | |
2832 // Note: the disjoint stubs must be generated first, some of | |
2833 // the conjoint stubs use them. | |
2834 StubRoutines::_jbyte_disjoint_arraycopy = generate_disjoint_byte_copy(false, "jbyte_disjoint_arraycopy"); | |
2835 StubRoutines::_jshort_disjoint_arraycopy = generate_disjoint_short_copy(false, "jshort_disjoint_arraycopy"); | |
2836 StubRoutines::_jint_disjoint_arraycopy = generate_disjoint_int_copy(false, "jint_disjoint_arraycopy"); | |
2837 StubRoutines::_jlong_disjoint_arraycopy = generate_disjoint_long_copy(false, "jlong_disjoint_arraycopy"); | |
2838 StubRoutines::_oop_disjoint_arraycopy = generate_disjoint_oop_copy(false, "oop_disjoint_arraycopy"); | |
2839 StubRoutines::_arrayof_jbyte_disjoint_arraycopy = generate_disjoint_byte_copy(true, "arrayof_jbyte_disjoint_arraycopy"); | |
2840 StubRoutines::_arrayof_jshort_disjoint_arraycopy = generate_disjoint_short_copy(true, "arrayof_jshort_disjoint_arraycopy"); | |
2841 StubRoutines::_arrayof_jint_disjoint_arraycopy = generate_disjoint_int_copy(true, "arrayof_jint_disjoint_arraycopy"); | |
2842 StubRoutines::_arrayof_jlong_disjoint_arraycopy = generate_disjoint_long_copy(true, "arrayof_jlong_disjoint_arraycopy"); | |
2843 StubRoutines::_arrayof_oop_disjoint_arraycopy = generate_disjoint_oop_copy(true, "arrayof_oop_disjoint_arraycopy"); | |
2844 | |
2845 StubRoutines::_jbyte_arraycopy = generate_conjoint_byte_copy(false, "jbyte_arraycopy"); | |
2846 StubRoutines::_jshort_arraycopy = generate_conjoint_short_copy(false, "jshort_arraycopy"); | |
2847 StubRoutines::_jint_arraycopy = generate_conjoint_int_copy(false, "jint_arraycopy"); | |
2848 StubRoutines::_jlong_arraycopy = generate_conjoint_long_copy(false, "jlong_arraycopy"); | |
2849 StubRoutines::_oop_arraycopy = generate_conjoint_oop_copy(false, "oop_arraycopy"); | |
2850 StubRoutines::_arrayof_jbyte_arraycopy = generate_conjoint_byte_copy(true, "arrayof_jbyte_arraycopy"); | |
2851 StubRoutines::_arrayof_jshort_arraycopy = generate_conjoint_short_copy(true, "arrayof_jshort_arraycopy"); | |
2852 #ifdef _LP64 | |
2853 // since sizeof(jint) < sizeof(HeapWord), there's a different flavor: | |
2854 StubRoutines::_arrayof_jint_arraycopy = generate_conjoint_int_copy(true, "arrayof_jint_arraycopy"); | |
2855 #else | |
2856 StubRoutines::_arrayof_jint_arraycopy = StubRoutines::_jint_arraycopy; | |
2857 #endif | |
2858 StubRoutines::_arrayof_jlong_arraycopy = StubRoutines::_jlong_arraycopy; | |
2859 StubRoutines::_arrayof_oop_arraycopy = StubRoutines::_oop_arraycopy; | |
2860 | |
2861 StubRoutines::_checkcast_arraycopy = generate_checkcast_copy("checkcast_arraycopy"); | |
2862 StubRoutines::_unsafe_arraycopy = generate_unsafe_copy("unsafe_arraycopy"); | |
2863 StubRoutines::_generic_arraycopy = generate_generic_copy("generic_arraycopy"); | |
2864 } | |
2865 | |
2866 void generate_initial() { | |
2867 // Generates all stubs and initializes the entry points | |
2868 | |
2869 //------------------------------------------------------------------------------------------------------------------------ | |
2870 // entry points that exist in all platforms | |
2871 // Note: This is code that could be shared among different platforms - however the benefit seems to be smaller than | |
2872 // the disadvantage of having a much more complicated generator structure. See also comment in stubRoutines.hpp. | |
2873 StubRoutines::_forward_exception_entry = generate_forward_exception(); | |
2874 | |
2875 StubRoutines::_call_stub_entry = generate_call_stub(StubRoutines::_call_stub_return_address); | |
2876 StubRoutines::_catch_exception_entry = generate_catch_exception(); | |
2877 | |
2878 //------------------------------------------------------------------------------------------------------------------------ | |
2879 // entry points that are platform specific | |
2880 StubRoutines::Sparc::_test_stop_entry = generate_test_stop(); | |
2881 | |
2882 StubRoutines::Sparc::_stop_subroutine_entry = generate_stop_subroutine(); | |
2883 StubRoutines::Sparc::_flush_callers_register_windows_entry = generate_flush_callers_register_windows(); | |
2884 | |
2885 #if !defined(COMPILER2) && !defined(_LP64) | |
2886 StubRoutines::_atomic_xchg_entry = generate_atomic_xchg(); | |
2887 StubRoutines::_atomic_cmpxchg_entry = generate_atomic_cmpxchg(); | |
2888 StubRoutines::_atomic_add_entry = generate_atomic_add(); | |
2889 StubRoutines::_atomic_xchg_ptr_entry = StubRoutines::_atomic_xchg_entry; | |
2890 StubRoutines::_atomic_cmpxchg_ptr_entry = StubRoutines::_atomic_cmpxchg_entry; | |
2891 StubRoutines::_atomic_cmpxchg_long_entry = generate_atomic_cmpxchg_long(); | |
2892 StubRoutines::_atomic_add_ptr_entry = StubRoutines::_atomic_add_entry; | |
2893 #endif // COMPILER2 !=> _LP64 | |
2894 } | |
2895 | |
2896 | |
2897 void generate_all() { | |
2898 // Generates all stubs and initializes the entry points | |
2899 | |
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2900 // Generate partial_subtype_check first here since its code depends on |
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2901 // UseZeroBaseCompressedOops which is defined after heap initialization. |
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2902 StubRoutines::Sparc::_partial_subtype_check = generate_partial_subtype_check(); |
0 | 2903 // These entry points require SharedInfo::stack0 to be set up in non-core builds |
2904 StubRoutines::_throw_AbstractMethodError_entry = generate_throw_exception("AbstractMethodError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_AbstractMethodError), false); | |
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2905 StubRoutines::_throw_IncompatibleClassChangeError_entry= generate_throw_exception("IncompatibleClassChangeError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_IncompatibleClassChangeError), false); |
0 | 2906 StubRoutines::_throw_ArithmeticException_entry = generate_throw_exception("ArithmeticException throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_ArithmeticException), true); |
2907 StubRoutines::_throw_NullPointerException_entry = generate_throw_exception("NullPointerException throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException), true); | |
2908 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); | |
2909 StubRoutines::_throw_StackOverflowError_entry = generate_throw_exception("StackOverflowError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_StackOverflowError), false); | |
2910 | |
2911 StubRoutines::_handler_for_unsafe_access_entry = | |
2912 generate_handler_for_unsafe_access(); | |
2913 | |
2914 // support for verify_oop (must happen after universe_init) | |
2915 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop_subroutine(); | |
2916 | |
2917 // arraycopy stubs used by compilers | |
2918 generate_arraycopy_stubs(); | |
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2919 |
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2920 // Don't initialize the platform math functions since sparc |
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2921 // doesn't have intrinsics for these operations. |
0 | 2922 } |
2923 | |
2924 | |
2925 public: | |
2926 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) { | |
2927 // replace the standard masm with a special one: | |
2928 _masm = new MacroAssembler(code); | |
2929 | |
2930 _stub_count = !all ? 0x100 : 0x200; | |
2931 if (all) { | |
2932 generate_all(); | |
2933 } else { | |
2934 generate_initial(); | |
2935 } | |
2936 | |
2937 // make sure this stub is available for all local calls | |
2938 if (_atomic_add_stub.is_unbound()) { | |
2939 // generate a second time, if necessary | |
2940 (void) generate_atomic_add(); | |
2941 } | |
2942 } | |
2943 | |
2944 | |
2945 private: | |
2946 int _stub_count; | |
2947 void stub_prolog(StubCodeDesc* cdesc) { | |
2948 # ifdef ASSERT | |
2949 // put extra information in the stub code, to make it more readable | |
2950 #ifdef _LP64 | |
2951 // Write the high part of the address | |
2952 // [RGV] Check if there is a dependency on the size of this prolog | |
2953 __ emit_data((intptr_t)cdesc >> 32, relocInfo::none); | |
2954 #endif | |
2955 __ emit_data((intptr_t)cdesc, relocInfo::none); | |
2956 __ emit_data(++_stub_count, relocInfo::none); | |
2957 # endif | |
2958 align(true); | |
2959 } | |
2960 | |
2961 void align(bool at_header = false) { | |
2962 // %%%%% move this constant somewhere else | |
2963 // UltraSPARC cache line size is 8 instructions: | |
2964 const unsigned int icache_line_size = 32; | |
2965 const unsigned int icache_half_line_size = 16; | |
2966 | |
2967 if (at_header) { | |
2968 while ((intptr_t)(__ pc()) % icache_line_size != 0) { | |
2969 __ emit_data(0, relocInfo::none); | |
2970 } | |
2971 } else { | |
2972 while ((intptr_t)(__ pc()) % icache_half_line_size != 0) { | |
2973 __ nop(); | |
2974 } | |
2975 } | |
2976 } | |
2977 | |
2978 }; // end class declaration | |
2979 | |
2980 | |
2981 address StubGenerator::disjoint_byte_copy_entry = NULL; | |
2982 address StubGenerator::disjoint_short_copy_entry = NULL; | |
2983 address StubGenerator::disjoint_int_copy_entry = NULL; | |
2984 address StubGenerator::disjoint_long_copy_entry = NULL; | |
2985 address StubGenerator::disjoint_oop_copy_entry = NULL; | |
2986 | |
2987 address StubGenerator::byte_copy_entry = NULL; | |
2988 address StubGenerator::short_copy_entry = NULL; | |
2989 address StubGenerator::int_copy_entry = NULL; | |
2990 address StubGenerator::long_copy_entry = NULL; | |
2991 address StubGenerator::oop_copy_entry = NULL; | |
2992 | |
2993 address StubGenerator::checkcast_copy_entry = NULL; | |
2994 | |
2995 void StubGenerator_generate(CodeBuffer* code, bool all) { | |
2996 StubGenerator g(code, all); | |
2997 } |