Mercurial > hg > truffle
annotate src/cpu/sparc/vm/stubGenerator_sparc.cpp @ 9800:2eaac2c3670b
VerifyUsageWithEquals/VerifyPhase: add documentation
author | Bernhard Urban <bernhard.urban@jku.at> |
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date | Thu, 23 May 2013 12:00:40 +0200 |
parents | 291ffc492eb6 |
children | 40b8c383bc31 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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26 #include "asm/macroAssembler.inline.hpp" |
1972 | 27 #include "interpreter/interpreter.hpp" |
28 #include "nativeInst_sparc.hpp" | |
29 #include "oops/instanceOop.hpp" | |
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30 #include "oops/method.hpp" |
1972 | 31 #include "oops/objArrayKlass.hpp" |
32 #include "oops/oop.inline.hpp" | |
33 #include "prims/methodHandles.hpp" | |
34 #include "runtime/frame.inline.hpp" | |
35 #include "runtime/handles.inline.hpp" | |
36 #include "runtime/sharedRuntime.hpp" | |
37 #include "runtime/stubCodeGenerator.hpp" | |
38 #include "runtime/stubRoutines.hpp" | |
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39 #include "runtime/thread.inline.hpp" |
1972 | 40 #include "utilities/top.hpp" |
41 #ifdef COMPILER2 | |
42 #include "opto/runtime.hpp" | |
43 #endif | |
0 | 44 |
45 // Declaration and definition of StubGenerator (no .hpp file). | |
46 // For a more detailed description of the stub routine structure | |
47 // see the comment in stubRoutines.hpp. | |
48 | |
49 #define __ _masm-> | |
50 | |
51 #ifdef PRODUCT | |
52 #define BLOCK_COMMENT(str) /* nothing */ | |
53 #else | |
54 #define BLOCK_COMMENT(str) __ block_comment(str) | |
55 #endif | |
56 | |
57 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") | |
58 | |
59 // Note: The register L7 is used as L7_thread_cache, and may not be used | |
60 // any other way within this module. | |
61 | |
62 | |
63 static const Register& Lstub_temp = L2; | |
64 | |
65 // ------------------------------------------------------------------------------------------------------------------------- | |
66 // Stub Code definitions | |
67 | |
68 static address handle_unsafe_access() { | |
69 JavaThread* thread = JavaThread::current(); | |
70 address pc = thread->saved_exception_pc(); | |
71 address npc = thread->saved_exception_npc(); | |
72 // pc is the instruction which we must emulate | |
73 // doing a no-op is fine: return garbage from the load | |
74 | |
75 // request an async exception | |
76 thread->set_pending_unsafe_access_error(); | |
77 | |
78 // return address of next instruction to execute | |
79 return npc; | |
80 } | |
81 | |
82 class StubGenerator: public StubCodeGenerator { | |
83 private: | |
84 | |
85 #ifdef PRODUCT | |
86 #define inc_counter_np(a,b,c) (0) | |
87 #else | |
88 #define inc_counter_np(counter, t1, t2) \ | |
89 BLOCK_COMMENT("inc_counter " #counter); \ | |
727 | 90 __ inc_counter(&counter, t1, t2); |
0 | 91 #endif |
92 | |
93 //---------------------------------------------------------------------------------------------------- | |
94 // Call stubs are used to call Java from C | |
95 | |
96 address generate_call_stub(address& return_pc) { | |
97 StubCodeMark mark(this, "StubRoutines", "call_stub"); | |
98 address start = __ pc(); | |
99 | |
100 // Incoming arguments: | |
101 // | |
102 // o0 : call wrapper address | |
103 // o1 : result (address) | |
104 // o2 : result type | |
105 // o3 : method | |
106 // o4 : (interpreter) entry point | |
107 // o5 : parameters (address) | |
108 // [sp + 0x5c]: parameter size (in words) | |
109 // [sp + 0x60]: thread | |
110 // | |
111 // +---------------+ <--- sp + 0 | |
112 // | | | |
113 // . reg save area . | |
114 // | | | |
115 // +---------------+ <--- sp + 0x40 | |
116 // | | | |
117 // . extra 7 slots . | |
118 // | | | |
119 // +---------------+ <--- sp + 0x5c | |
120 // | param. size | | |
121 // +---------------+ <--- sp + 0x60 | |
122 // | thread | | |
123 // +---------------+ | |
124 // | | | |
125 | |
126 // note: if the link argument position changes, adjust | |
127 // the code in frame::entry_frame_call_wrapper() | |
128 | |
129 const Argument link = Argument(0, false); // used only for GC | |
130 const Argument result = Argument(1, false); | |
131 const Argument result_type = Argument(2, false); | |
132 const Argument method = Argument(3, false); | |
133 const Argument entry_point = Argument(4, false); | |
134 const Argument parameters = Argument(5, false); | |
135 const Argument parameter_size = Argument(6, false); | |
136 const Argument thread = Argument(7, false); | |
137 | |
138 // setup thread register | |
139 __ ld_ptr(thread.as_address(), G2_thread); | |
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140 __ reinit_heapbase(); |
0 | 141 |
142 #ifdef ASSERT | |
143 // make sure we have no pending exceptions | |
144 { const Register t = G3_scratch; | |
145 Label L; | |
146 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), t); | |
3839 | 147 __ br_null_short(t, Assembler::pt, L); |
0 | 148 __ stop("StubRoutines::call_stub: entered with pending exception"); |
149 __ bind(L); | |
150 } | |
151 #endif | |
152 | |
153 // create activation frame & allocate space for parameters | |
154 { const Register t = G3_scratch; | |
155 __ ld_ptr(parameter_size.as_address(), t); // get parameter size (in words) | |
156 __ add(t, frame::memory_parameter_word_sp_offset, t); // add space for save area (in words) | |
157 __ round_to(t, WordsPerLong); // make sure it is multiple of 2 (in words) | |
1506 | 158 __ sll(t, Interpreter::logStackElementSize, t); // compute number of bytes |
0 | 159 __ neg(t); // negate so it can be used with save |
160 __ save(SP, t, SP); // setup new frame | |
161 } | |
162 | |
163 // +---------------+ <--- sp + 0 | |
164 // | | | |
165 // . reg save area . | |
166 // | | | |
167 // +---------------+ <--- sp + 0x40 | |
168 // | | | |
169 // . extra 7 slots . | |
170 // | | | |
171 // +---------------+ <--- sp + 0x5c | |
172 // | empty slot | (only if parameter size is even) | |
173 // +---------------+ | |
174 // | | | |
175 // . parameters . | |
176 // | | | |
177 // +---------------+ <--- fp + 0 | |
178 // | | | |
179 // . reg save area . | |
180 // | | | |
181 // +---------------+ <--- fp + 0x40 | |
182 // | | | |
183 // . extra 7 slots . | |
184 // | | | |
185 // +---------------+ <--- fp + 0x5c | |
186 // | param. size | | |
187 // +---------------+ <--- fp + 0x60 | |
188 // | thread | | |
189 // +---------------+ | |
190 // | | | |
191 | |
192 // pass parameters if any | |
193 BLOCK_COMMENT("pass parameters if any"); | |
194 { const Register src = parameters.as_in().as_register(); | |
195 const Register dst = Lentry_args; | |
196 const Register tmp = G3_scratch; | |
197 const Register cnt = G4_scratch; | |
198 | |
199 // test if any parameters & setup of Lentry_args | |
200 Label exit; | |
201 __ ld_ptr(parameter_size.as_in().as_address(), cnt); // parameter counter | |
202 __ add( FP, STACK_BIAS, dst ); | |
3839 | 203 __ cmp_zero_and_br(Assembler::zero, cnt, exit); |
0 | 204 __ delayed()->sub(dst, BytesPerWord, dst); // setup Lentry_args |
205 | |
206 // copy parameters if any | |
207 Label loop; | |
208 __ BIND(loop); | |
209 // Store parameter value | |
210 __ ld_ptr(src, 0, tmp); | |
211 __ add(src, BytesPerWord, src); | |
1506 | 212 __ st_ptr(tmp, dst, 0); |
0 | 213 __ deccc(cnt); |
214 __ br(Assembler::greater, false, Assembler::pt, loop); | |
1506 | 215 __ delayed()->sub(dst, Interpreter::stackElementSize, dst); |
0 | 216 |
217 // done | |
218 __ BIND(exit); | |
219 } | |
220 | |
221 // setup parameters, method & call Java function | |
222 #ifdef ASSERT | |
223 // layout_activation_impl checks it's notion of saved SP against | |
224 // this register, so if this changes update it as well. | |
225 const Register saved_SP = Lscratch; | |
226 __ mov(SP, saved_SP); // keep track of SP before call | |
227 #endif | |
228 | |
229 // setup parameters | |
230 const Register t = G3_scratch; | |
231 __ ld_ptr(parameter_size.as_in().as_address(), t); // get parameter size (in words) | |
1506 | 232 __ sll(t, Interpreter::logStackElementSize, t); // compute number of bytes |
0 | 233 __ sub(FP, t, Gargs); // setup parameter pointer |
234 #ifdef _LP64 | |
235 __ add( Gargs, STACK_BIAS, Gargs ); // Account for LP64 stack bias | |
236 #endif | |
237 __ mov(SP, O5_savedSP); | |
238 | |
239 | |
240 // do the call | |
241 // | |
242 // the following register must be setup: | |
243 // | |
244 // G2_thread | |
245 // G5_method | |
246 // Gargs | |
247 BLOCK_COMMENT("call Java function"); | |
248 __ jmpl(entry_point.as_in().as_register(), G0, O7); | |
249 __ delayed()->mov(method.as_in().as_register(), G5_method); // setup method | |
250 | |
251 BLOCK_COMMENT("call_stub_return_address:"); | |
252 return_pc = __ pc(); | |
253 | |
254 // The callee, if it wasn't interpreted, can return with SP changed so | |
255 // we can no longer assert of change of SP. | |
256 | |
257 // store result depending on type | |
258 // (everything that is not T_OBJECT, T_LONG, T_FLOAT, or T_DOUBLE | |
259 // is treated as T_INT) | |
260 { const Register addr = result .as_in().as_register(); | |
261 const Register type = result_type.as_in().as_register(); | |
262 Label is_long, is_float, is_double, is_object, exit; | |
263 __ cmp(type, T_OBJECT); __ br(Assembler::equal, false, Assembler::pn, is_object); | |
264 __ delayed()->cmp(type, T_FLOAT); __ br(Assembler::equal, false, Assembler::pn, is_float); | |
265 __ delayed()->cmp(type, T_DOUBLE); __ br(Assembler::equal, false, Assembler::pn, is_double); | |
266 __ delayed()->cmp(type, T_LONG); __ br(Assembler::equal, false, Assembler::pn, is_long); | |
267 __ delayed()->nop(); | |
268 | |
269 // store int result | |
270 __ st(O0, addr, G0); | |
271 | |
272 __ BIND(exit); | |
273 __ ret(); | |
274 __ delayed()->restore(); | |
275 | |
276 __ BIND(is_object); | |
3839 | 277 __ ba(exit); |
0 | 278 __ delayed()->st_ptr(O0, addr, G0); |
279 | |
280 __ BIND(is_float); | |
3839 | 281 __ ba(exit); |
0 | 282 __ delayed()->stf(FloatRegisterImpl::S, F0, addr, G0); |
283 | |
284 __ BIND(is_double); | |
3839 | 285 __ ba(exit); |
0 | 286 __ delayed()->stf(FloatRegisterImpl::D, F0, addr, G0); |
287 | |
288 __ BIND(is_long); | |
289 #ifdef _LP64 | |
3839 | 290 __ ba(exit); |
0 | 291 __ delayed()->st_long(O0, addr, G0); // store entire long |
292 #else | |
293 #if defined(COMPILER2) | |
294 // All return values are where we want them, except for Longs. C2 returns | |
295 // longs in G1 in the 32-bit build whereas the interpreter wants them in O0/O1. | |
296 // Since the interpreter will return longs in G1 and O0/O1 in the 32bit | |
297 // build we simply always use G1. | |
298 // Note: I tried to make c2 return longs in O0/O1 and G1 so we wouldn't have to | |
299 // do this here. Unfortunately if we did a rethrow we'd see an machepilog node | |
300 // first which would move g1 -> O0/O1 and destroy the exception we were throwing. | |
301 | |
3839 | 302 __ ba(exit); |
0 | 303 __ delayed()->stx(G1, addr, G0); // store entire long |
304 #else | |
305 __ st(O1, addr, BytesPerInt); | |
3839 | 306 __ ba(exit); |
0 | 307 __ delayed()->st(O0, addr, G0); |
308 #endif /* COMPILER2 */ | |
309 #endif /* _LP64 */ | |
310 } | |
311 return start; | |
312 } | |
313 | |
314 | |
315 //---------------------------------------------------------------------------------------------------- | |
316 // Return point for a Java call if there's an exception thrown in Java code. | |
317 // The exception is caught and transformed into a pending exception stored in | |
318 // JavaThread that can be tested from within the VM. | |
319 // | |
320 // Oexception: exception oop | |
321 | |
322 address generate_catch_exception() { | |
323 StubCodeMark mark(this, "StubRoutines", "catch_exception"); | |
324 | |
325 address start = __ pc(); | |
326 // verify that thread corresponds | |
327 __ verify_thread(); | |
328 | |
329 const Register& temp_reg = Gtemp; | |
727 | 330 Address pending_exception_addr (G2_thread, Thread::pending_exception_offset()); |
331 Address exception_file_offset_addr(G2_thread, Thread::exception_file_offset ()); | |
332 Address exception_line_offset_addr(G2_thread, Thread::exception_line_offset ()); | |
0 | 333 |
334 // set pending exception | |
335 __ verify_oop(Oexception); | |
336 __ st_ptr(Oexception, pending_exception_addr); | |
337 __ set((intptr_t)__FILE__, temp_reg); | |
338 __ st_ptr(temp_reg, exception_file_offset_addr); | |
339 __ set((intptr_t)__LINE__, temp_reg); | |
340 __ st(temp_reg, exception_line_offset_addr); | |
341 | |
342 // complete return to VM | |
343 assert(StubRoutines::_call_stub_return_address != NULL, "must have been generated before"); | |
344 | |
727 | 345 AddressLiteral stub_ret(StubRoutines::_call_stub_return_address); |
346 __ jump_to(stub_ret, temp_reg); | |
0 | 347 __ delayed()->nop(); |
348 | |
349 return start; | |
350 } | |
351 | |
352 | |
353 //---------------------------------------------------------------------------------------------------- | |
354 // Continuation point for runtime calls returning with a pending exception | |
355 // The pending exception check happened in the runtime or native call stub | |
356 // The pending exception in Thread is converted into a Java-level exception | |
357 // | |
358 // Contract with Java-level exception handler: O0 = exception | |
359 // O1 = throwing pc | |
360 | |
361 address generate_forward_exception() { | |
362 StubCodeMark mark(this, "StubRoutines", "forward_exception"); | |
363 address start = __ pc(); | |
364 | |
365 // Upon entry, O7 has the return address returning into Java | |
366 // (interpreted or compiled) code; i.e. the return address | |
367 // becomes the throwing pc. | |
368 | |
369 const Register& handler_reg = Gtemp; | |
370 | |
727 | 371 Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
0 | 372 |
373 #ifdef ASSERT | |
374 // make sure that this code is only executed if there is a pending exception | |
375 { Label L; | |
376 __ ld_ptr(exception_addr, Gtemp); | |
3839 | 377 __ br_notnull_short(Gtemp, Assembler::pt, L); |
0 | 378 __ stop("StubRoutines::forward exception: no pending exception (1)"); |
379 __ bind(L); | |
380 } | |
381 #endif | |
382 | |
383 // compute exception handler into handler_reg | |
384 __ get_thread(); | |
385 __ ld_ptr(exception_addr, Oexception); | |
386 __ verify_oop(Oexception); | |
387 __ save_frame(0); // compensates for compiler weakness | |
388 __ add(O7->after_save(), frame::pc_return_offset, Lscratch); // save the issuing PC | |
389 BLOCK_COMMENT("call exception_handler_for_return_address"); | |
1295 | 390 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), G2_thread, Lscratch); |
0 | 391 __ mov(O0, handler_reg); |
392 __ restore(); // compensates for compiler weakness | |
393 | |
394 __ ld_ptr(exception_addr, Oexception); | |
395 __ add(O7, frame::pc_return_offset, Oissuing_pc); // save the issuing PC | |
396 | |
397 #ifdef ASSERT | |
398 // make sure exception is set | |
399 { Label L; | |
3839 | 400 __ br_notnull_short(Oexception, Assembler::pt, L); |
0 | 401 __ stop("StubRoutines::forward exception: no pending exception (2)"); |
402 __ bind(L); | |
403 } | |
404 #endif | |
405 // jump to exception handler | |
406 __ jmp(handler_reg, 0); | |
407 // clear pending exception | |
408 __ delayed()->st_ptr(G0, exception_addr); | |
409 | |
410 return start; | |
411 } | |
412 | |
413 | |
414 //------------------------------------------------------------------------------------------------------------------------ | |
415 // Continuation point for throwing of implicit exceptions that are not handled in | |
416 // the current activation. Fabricates an exception oop and initiates normal | |
417 // exception dispatching in this frame. Only callee-saved registers are preserved | |
418 // (through the normal register window / RegisterMap handling). | |
419 // If the compiler needs all registers to be preserved between the fault | |
420 // point and the exception handler then it must assume responsibility for that in | |
421 // AbstractCompiler::continuation_for_implicit_null_exception or | |
422 // continuation_for_implicit_division_by_zero_exception. All other implicit | |
423 // exceptions (e.g., NullPointerException or AbstractMethodError on entry) are | |
424 // either at call sites or otherwise assume that stack unwinding will be initiated, | |
425 // so caller saved registers were assumed volatile in the compiler. | |
426 | |
427 // Note that we generate only this stub into a RuntimeStub, because it needs to be | |
428 // properly traversed and ignored during GC, so we change the meaning of the "__" | |
429 // macro within this method. | |
430 #undef __ | |
431 #define __ masm-> | |
432 | |
3937 | 433 address generate_throw_exception(const char* name, address runtime_entry, |
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434 Register arg1 = noreg, Register arg2 = noreg) { |
0 | 435 #ifdef ASSERT |
436 int insts_size = VerifyThread ? 1 * K : 600; | |
437 #else | |
438 int insts_size = VerifyThread ? 1 * K : 256; | |
439 #endif /* ASSERT */ | |
440 int locs_size = 32; | |
441 | |
442 CodeBuffer code(name, insts_size, locs_size); | |
443 MacroAssembler* masm = new MacroAssembler(&code); | |
444 | |
445 __ verify_thread(); | |
446 | |
447 // This is an inlined and slightly modified version of call_VM | |
448 // which has the ability to fetch the return PC out of thread-local storage | |
449 __ assert_not_delayed(); | |
450 | |
451 // Note that we always push a frame because on the SPARC | |
452 // architecture, for all of our implicit exception kinds at call | |
453 // sites, the implicit exception is taken before the callee frame | |
454 // is pushed. | |
455 __ save_frame(0); | |
456 | |
457 int frame_complete = __ offset(); | |
458 | |
459 // Note that we always have a runtime stub frame on the top of stack by this point | |
460 Register last_java_sp = SP; | |
461 // 64-bit last_java_sp is biased! | |
462 __ set_last_Java_frame(last_java_sp, G0); | |
463 if (VerifyThread) __ mov(G2_thread, O0); // about to be smashed; pass early | |
464 __ save_thread(noreg); | |
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465 if (arg1 != noreg) { |
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466 assert(arg2 != O1, "clobbered"); |
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467 __ mov(arg1, O1); |
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468 } |
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469 if (arg2 != noreg) { |
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470 __ mov(arg2, O2); |
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471 } |
0 | 472 // do the call |
473 BLOCK_COMMENT("call runtime_entry"); | |
474 __ call(runtime_entry, relocInfo::runtime_call_type); | |
475 if (!VerifyThread) | |
476 __ delayed()->mov(G2_thread, O0); // pass thread as first argument | |
477 else | |
478 __ delayed()->nop(); // (thread already passed) | |
479 __ restore_thread(noreg); | |
480 __ reset_last_Java_frame(); | |
481 | |
482 // check for pending exceptions. use Gtemp as scratch register. | |
483 #ifdef ASSERT | |
484 Label L; | |
485 | |
727 | 486 Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
0 | 487 Register scratch_reg = Gtemp; |
488 __ ld_ptr(exception_addr, scratch_reg); | |
3839 | 489 __ br_notnull_short(scratch_reg, Assembler::pt, L); |
0 | 490 __ should_not_reach_here(); |
491 __ bind(L); | |
492 #endif // ASSERT | |
493 BLOCK_COMMENT("call forward_exception_entry"); | |
494 __ call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type); | |
495 // we use O7 linkage so that forward_exception_entry has the issuing PC | |
496 __ delayed()->restore(); | |
497 | |
498 RuntimeStub* stub = RuntimeStub::new_runtime_stub(name, &code, frame_complete, masm->total_frame_size_in_bytes(0), NULL, false); | |
499 return stub->entry_point(); | |
500 } | |
501 | |
502 #undef __ | |
503 #define __ _masm-> | |
504 | |
505 | |
506 // Generate a routine that sets all the registers so we | |
507 // can tell if the stop routine prints them correctly. | |
508 address generate_test_stop() { | |
509 StubCodeMark mark(this, "StubRoutines", "test_stop"); | |
510 address start = __ pc(); | |
511 | |
512 int i; | |
513 | |
514 __ save_frame(0); | |
515 | |
516 static jfloat zero = 0.0, one = 1.0; | |
517 | |
518 // put addr in L0, then load through L0 to F0 | |
519 __ set((intptr_t)&zero, L0); __ ldf( FloatRegisterImpl::S, L0, 0, F0); | |
520 __ set((intptr_t)&one, L0); __ ldf( FloatRegisterImpl::S, L0, 0, F1); // 1.0 to F1 | |
521 | |
522 // use add to put 2..18 in F2..F18 | |
523 for ( i = 2; i <= 18; ++i ) { | |
524 __ fadd( FloatRegisterImpl::S, F1, as_FloatRegister(i-1), as_FloatRegister(i)); | |
525 } | |
526 | |
527 // Now put double 2 in F16, double 18 in F18 | |
528 __ ftof( FloatRegisterImpl::S, FloatRegisterImpl::D, F2, F16 ); | |
529 __ ftof( FloatRegisterImpl::S, FloatRegisterImpl::D, F18, F18 ); | |
530 | |
531 // use add to put 20..32 in F20..F32 | |
532 for (i = 20; i < 32; i += 2) { | |
533 __ fadd( FloatRegisterImpl::D, F16, as_FloatRegister(i-2), as_FloatRegister(i)); | |
534 } | |
535 | |
536 // put 0..7 in i's, 8..15 in l's, 16..23 in o's, 24..31 in g's | |
537 for ( i = 0; i < 8; ++i ) { | |
538 if (i < 6) { | |
539 __ set( i, as_iRegister(i)); | |
540 __ set(16 + i, as_oRegister(i)); | |
541 __ set(24 + i, as_gRegister(i)); | |
542 } | |
543 __ set( 8 + i, as_lRegister(i)); | |
544 } | |
545 | |
546 __ stop("testing stop"); | |
547 | |
548 | |
549 __ ret(); | |
550 __ delayed()->restore(); | |
551 | |
552 return start; | |
553 } | |
554 | |
555 | |
556 address generate_stop_subroutine() { | |
557 StubCodeMark mark(this, "StubRoutines", "stop_subroutine"); | |
558 address start = __ pc(); | |
559 | |
560 __ stop_subroutine(); | |
561 | |
562 return start; | |
563 } | |
564 | |
565 address generate_flush_callers_register_windows() { | |
566 StubCodeMark mark(this, "StubRoutines", "flush_callers_register_windows"); | |
567 address start = __ pc(); | |
568 | |
569 __ flush_windows(); | |
570 __ retl(false); | |
571 __ delayed()->add( FP, STACK_BIAS, O0 ); | |
572 // The returned value must be a stack pointer whose register save area | |
573 // is flushed, and will stay flushed while the caller executes. | |
574 | |
575 return start; | |
576 } | |
577 | |
578 // Helper functions for v8 atomic operations. | |
579 // | |
580 void get_v8_oop_lock_ptr(Register lock_ptr_reg, Register mark_oop_reg, Register scratch_reg) { | |
581 if (mark_oop_reg == noreg) { | |
582 address lock_ptr = (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(); | |
583 __ set((intptr_t)lock_ptr, lock_ptr_reg); | |
584 } else { | |
585 assert(scratch_reg != noreg, "just checking"); | |
586 address lock_ptr = (address)StubRoutines::Sparc::_v8_oop_lock_cache; | |
587 __ set((intptr_t)lock_ptr, lock_ptr_reg); | |
588 __ and3(mark_oop_reg, StubRoutines::Sparc::v8_oop_lock_mask_in_place, scratch_reg); | |
589 __ add(lock_ptr_reg, scratch_reg, lock_ptr_reg); | |
590 } | |
591 } | |
592 | |
593 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) { | |
594 | |
595 get_v8_oop_lock_ptr(lock_ptr_reg, mark_oop_reg, scratch_reg); | |
596 __ set(StubRoutines::Sparc::locked, lock_reg); | |
597 // Initialize yield counter | |
598 __ mov(G0,yield_reg); | |
599 | |
600 __ BIND(retry); | |
3839 | 601 __ cmp_and_br_short(yield_reg, V8AtomicOperationUnderLockSpinCount, Assembler::less, Assembler::pt, dontyield); |
0 | 602 |
603 // This code can only be called from inside the VM, this | |
604 // stub is only invoked from Atomic::add(). We do not | |
605 // want to use call_VM, because _last_java_sp and such | |
606 // must already be set. | |
607 // | |
608 // Save the regs and make space for a C call | |
609 __ save(SP, -96, SP); | |
610 __ save_all_globals_into_locals(); | |
611 BLOCK_COMMENT("call os::naked_sleep"); | |
612 __ call(CAST_FROM_FN_PTR(address, os::naked_sleep)); | |
613 __ delayed()->nop(); | |
614 __ restore_globals_from_locals(); | |
615 __ restore(); | |
616 // reset the counter | |
617 __ mov(G0,yield_reg); | |
618 | |
619 __ BIND(dontyield); | |
620 | |
621 // try to get lock | |
622 __ swap(lock_ptr_reg, 0, lock_reg); | |
623 | |
624 // did we get the lock? | |
625 __ cmp(lock_reg, StubRoutines::Sparc::unlocked); | |
626 __ br(Assembler::notEqual, true, Assembler::pn, retry); | |
627 __ delayed()->add(yield_reg,1,yield_reg); | |
628 | |
629 // yes, got lock. do the operation here. | |
630 } | |
631 | |
632 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) { | |
633 __ st(lock_reg, lock_ptr_reg, 0); // unlock | |
634 } | |
635 | |
636 // Support for jint Atomic::xchg(jint exchange_value, volatile jint* dest). | |
637 // | |
638 // Arguments : | |
639 // | |
640 // exchange_value: O0 | |
641 // dest: O1 | |
642 // | |
643 // Results: | |
644 // | |
645 // O0: the value previously stored in dest | |
646 // | |
647 address generate_atomic_xchg() { | |
648 StubCodeMark mark(this, "StubRoutines", "atomic_xchg"); | |
649 address start = __ pc(); | |
650 | |
651 if (UseCASForSwap) { | |
652 // Use CAS instead of swap, just in case the MP hardware | |
653 // prefers to work with just one kind of synch. instruction. | |
654 Label retry; | |
655 __ BIND(retry); | |
656 __ mov(O0, O3); // scratch copy of exchange value | |
657 __ ld(O1, 0, O2); // observe the previous value | |
658 // try to replace O2 with O3 | |
659 __ cas_under_lock(O1, O2, O3, | |
660 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(),false); | |
3839 | 661 __ cmp_and_br_short(O2, O3, Assembler::notEqual, Assembler::pn, retry); |
0 | 662 |
663 __ retl(false); | |
664 __ delayed()->mov(O2, O0); // report previous value to caller | |
665 | |
666 } else { | |
667 if (VM_Version::v9_instructions_work()) { | |
668 __ retl(false); | |
669 __ delayed()->swap(O1, 0, O0); | |
670 } else { | |
671 const Register& lock_reg = O2; | |
672 const Register& lock_ptr_reg = O3; | |
673 const Register& yield_reg = O4; | |
674 | |
675 Label retry; | |
676 Label dontyield; | |
677 | |
678 generate_v8_lock_prologue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
679 // got the lock, do the swap | |
680 __ swap(O1, 0, O0); | |
681 | |
682 generate_v8_lock_epilogue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
683 __ retl(false); | |
684 __ delayed()->nop(); | |
685 } | |
686 } | |
687 | |
688 return start; | |
689 } | |
690 | |
691 | |
692 // Support for jint Atomic::cmpxchg(jint exchange_value, volatile jint* dest, jint compare_value) | |
693 // | |
694 // Arguments : | |
695 // | |
696 // exchange_value: O0 | |
697 // dest: O1 | |
698 // compare_value: O2 | |
699 // | |
700 // Results: | |
701 // | |
702 // O0: the value previously stored in dest | |
703 // | |
704 // Overwrites (v8): O3,O4,O5 | |
705 // | |
706 address generate_atomic_cmpxchg() { | |
707 StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg"); | |
708 address start = __ pc(); | |
709 | |
710 // cmpxchg(dest, compare_value, exchange_value) | |
711 __ cas_under_lock(O1, O2, O0, | |
712 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(),false); | |
713 __ retl(false); | |
714 __ delayed()->nop(); | |
715 | |
716 return start; | |
717 } | |
718 | |
719 // Support for jlong Atomic::cmpxchg(jlong exchange_value, volatile jlong *dest, jlong compare_value) | |
720 // | |
721 // Arguments : | |
722 // | |
723 // exchange_value: O1:O0 | |
724 // dest: O2 | |
725 // compare_value: O4:O3 | |
726 // | |
727 // Results: | |
728 // | |
729 // O1:O0: the value previously stored in dest | |
730 // | |
731 // This only works on V9, on V8 we don't generate any | |
732 // code and just return NULL. | |
733 // | |
734 // Overwrites: G1,G2,G3 | |
735 // | |
736 address generate_atomic_cmpxchg_long() { | |
737 StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg_long"); | |
738 address start = __ pc(); | |
739 | |
740 if (!VM_Version::supports_cx8()) | |
741 return NULL;; | |
742 __ sllx(O0, 32, O0); | |
743 __ srl(O1, 0, O1); | |
744 __ or3(O0,O1,O0); // O0 holds 64-bit value from compare_value | |
745 __ sllx(O3, 32, O3); | |
746 __ srl(O4, 0, O4); | |
747 __ or3(O3,O4,O3); // O3 holds 64-bit value from exchange_value | |
748 __ casx(O2, O3, O0); | |
749 __ srl(O0, 0, O1); // unpacked return value in O1:O0 | |
750 __ retl(false); | |
751 __ delayed()->srlx(O0, 32, O0); | |
752 | |
753 return start; | |
754 } | |
755 | |
756 | |
757 // Support for jint Atomic::add(jint add_value, volatile jint* dest). | |
758 // | |
759 // Arguments : | |
760 // | |
761 // add_value: O0 (e.g., +1 or -1) | |
762 // dest: O1 | |
763 // | |
764 // Results: | |
765 // | |
766 // O0: the new value stored in dest | |
767 // | |
768 // Overwrites (v9): O3 | |
769 // Overwrites (v8): O3,O4,O5 | |
770 // | |
771 address generate_atomic_add() { | |
772 StubCodeMark mark(this, "StubRoutines", "atomic_add"); | |
773 address start = __ pc(); | |
774 __ BIND(_atomic_add_stub); | |
775 | |
776 if (VM_Version::v9_instructions_work()) { | |
777 Label(retry); | |
778 __ BIND(retry); | |
779 | |
780 __ lduw(O1, 0, O2); | |
3839 | 781 __ add(O0, O2, O3); |
782 __ cas(O1, O2, O3); | |
783 __ cmp_and_br_short(O2, O3, Assembler::notEqual, Assembler::pn, retry); | |
0 | 784 __ retl(false); |
785 __ delayed()->add(O0, O2, O0); // note that cas made O2==O3 | |
786 } else { | |
787 const Register& lock_reg = O2; | |
788 const Register& lock_ptr_reg = O3; | |
789 const Register& value_reg = O4; | |
790 const Register& yield_reg = O5; | |
791 | |
792 Label(retry); | |
793 Label(dontyield); | |
794 | |
795 generate_v8_lock_prologue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
796 // got lock, do the increment | |
797 __ ld(O1, 0, value_reg); | |
798 __ add(O0, value_reg, value_reg); | |
799 __ st(value_reg, O1, 0); | |
800 | |
801 // %%% only for RMO and PSO | |
802 __ membar(Assembler::StoreStore); | |
803 | |
804 generate_v8_lock_epilogue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
805 | |
806 __ retl(false); | |
807 __ delayed()->mov(value_reg, O0); | |
808 } | |
809 | |
810 return start; | |
811 } | |
812 Label _atomic_add_stub; // called from other stubs | |
813 | |
814 | |
815 //------------------------------------------------------------------------------------------------------------------------ | |
816 // The following routine generates a subroutine to throw an asynchronous | |
817 // UnknownError when an unsafe access gets a fault that could not be | |
818 // reasonably prevented by the programmer. (Example: SIGBUS/OBJERR.) | |
819 // | |
820 // Arguments : | |
821 // | |
822 // trapping PC: O7 | |
823 // | |
824 // Results: | |
825 // posts an asynchronous exception, skips the trapping instruction | |
826 // | |
827 | |
828 address generate_handler_for_unsafe_access() { | |
829 StubCodeMark mark(this, "StubRoutines", "handler_for_unsafe_access"); | |
830 address start = __ pc(); | |
831 | |
832 const int preserve_register_words = (64 * 2); | |
727 | 833 Address preserve_addr(FP, (-preserve_register_words * wordSize) + STACK_BIAS); |
0 | 834 |
835 Register Lthread = L7_thread_cache; | |
836 int i; | |
837 | |
838 __ save_frame(0); | |
839 __ mov(G1, L1); | |
840 __ mov(G2, L2); | |
841 __ mov(G3, L3); | |
842 __ mov(G4, L4); | |
843 __ mov(G5, L5); | |
844 for (i = 0; i < (VM_Version::v9_instructions_work() ? 64 : 32); i += 2) { | |
845 __ stf(FloatRegisterImpl::D, as_FloatRegister(i), preserve_addr, i * wordSize); | |
846 } | |
847 | |
848 address entry_point = CAST_FROM_FN_PTR(address, handle_unsafe_access); | |
849 BLOCK_COMMENT("call handle_unsafe_access"); | |
850 __ call(entry_point, relocInfo::runtime_call_type); | |
851 __ delayed()->nop(); | |
852 | |
853 __ mov(L1, G1); | |
854 __ mov(L2, G2); | |
855 __ mov(L3, G3); | |
856 __ mov(L4, G4); | |
857 __ mov(L5, G5); | |
858 for (i = 0; i < (VM_Version::v9_instructions_work() ? 64 : 32); i += 2) { | |
859 __ ldf(FloatRegisterImpl::D, preserve_addr, as_FloatRegister(i), i * wordSize); | |
860 } | |
861 | |
862 __ verify_thread(); | |
863 | |
864 __ jmp(O0, 0); | |
865 __ delayed()->restore(); | |
866 | |
867 return start; | |
868 } | |
869 | |
870 | |
871 // Support for uint StubRoutine::Sparc::partial_subtype_check( Klass sub, Klass super ); | |
872 // Arguments : | |
873 // | |
874 // ret : O0, returned | |
875 // icc/xcc: set as O0 (depending on wordSize) | |
876 // sub : O1, argument, not changed | |
877 // super: O2, argument, not changed | |
878 // raddr: O7, blown by call | |
879 address generate_partial_subtype_check() { | |
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880 __ align(CodeEntryAlignment); |
0 | 881 StubCodeMark mark(this, "StubRoutines", "partial_subtype_check"); |
882 address start = __ pc(); | |
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883 Label miss; |
0 | 884 |
885 #if defined(COMPILER2) && !defined(_LP64) | |
886 // Do not use a 'save' because it blows the 64-bit O registers. | |
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887 __ add(SP,-4*wordSize,SP); // Make space for 4 temps (stack must be 2 words aligned) |
0 | 888 __ st_ptr(L0,SP,(frame::register_save_words+0)*wordSize); |
889 __ st_ptr(L1,SP,(frame::register_save_words+1)*wordSize); | |
890 __ st_ptr(L2,SP,(frame::register_save_words+2)*wordSize); | |
891 __ st_ptr(L3,SP,(frame::register_save_words+3)*wordSize); | |
892 Register Rret = O0; | |
893 Register Rsub = O1; | |
894 Register Rsuper = O2; | |
895 #else | |
896 __ save_frame(0); | |
897 Register Rret = I0; | |
898 Register Rsub = I1; | |
899 Register Rsuper = I2; | |
900 #endif | |
901 | |
902 Register L0_ary_len = L0; | |
903 Register L1_ary_ptr = L1; | |
904 Register L2_super = L2; | |
905 Register L3_index = L3; | |
906 | |
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907 __ check_klass_subtype_slow_path(Rsub, Rsuper, |
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908 L0, L1, L2, L3, |
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909 NULL, &miss); |
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910 |
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911 // Match falls through here. |
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912 __ addcc(G0,0,Rret); // set Z flags, Z result |
0 | 913 |
914 #if defined(COMPILER2) && !defined(_LP64) | |
915 __ ld_ptr(SP,(frame::register_save_words+0)*wordSize,L0); | |
916 __ ld_ptr(SP,(frame::register_save_words+1)*wordSize,L1); | |
917 __ ld_ptr(SP,(frame::register_save_words+2)*wordSize,L2); | |
918 __ ld_ptr(SP,(frame::register_save_words+3)*wordSize,L3); | |
919 __ retl(); // Result in Rret is zero; flags set to Z | |
920 __ delayed()->add(SP,4*wordSize,SP); | |
921 #else | |
922 __ ret(); // Result in Rret is zero; flags set to Z | |
923 __ delayed()->restore(); | |
924 #endif | |
925 | |
926 __ BIND(miss); | |
927 __ addcc(G0,1,Rret); // set NZ flags, NZ result | |
928 | |
929 #if defined(COMPILER2) && !defined(_LP64) | |
930 __ ld_ptr(SP,(frame::register_save_words+0)*wordSize,L0); | |
931 __ ld_ptr(SP,(frame::register_save_words+1)*wordSize,L1); | |
932 __ ld_ptr(SP,(frame::register_save_words+2)*wordSize,L2); | |
933 __ ld_ptr(SP,(frame::register_save_words+3)*wordSize,L3); | |
934 __ retl(); // Result in Rret is != 0; flags set to NZ | |
935 __ delayed()->add(SP,4*wordSize,SP); | |
936 #else | |
937 __ ret(); // Result in Rret is != 0; flags set to NZ | |
938 __ delayed()->restore(); | |
939 #endif | |
940 | |
941 return start; | |
942 } | |
943 | |
944 | |
945 // Called from MacroAssembler::verify_oop | |
946 // | |
947 address generate_verify_oop_subroutine() { | |
948 StubCodeMark mark(this, "StubRoutines", "verify_oop_stub"); | |
949 | |
950 address start = __ pc(); | |
951 | |
952 __ verify_oop_subroutine(); | |
953 | |
954 return start; | |
955 } | |
956 | |
957 | |
958 // | |
959 // Verify that a register contains clean 32-bits positive value | |
960 // (high 32-bits are 0) so it could be used in 64-bits shifts (sllx, srax). | |
961 // | |
962 // Input: | |
963 // Rint - 32-bits value | |
964 // Rtmp - scratch | |
965 // | |
966 void assert_clean_int(Register Rint, Register Rtmp) { | |
967 #if defined(ASSERT) && defined(_LP64) | |
968 __ signx(Rint, Rtmp); | |
969 __ cmp(Rint, Rtmp); | |
970 __ breakpoint_trap(Assembler::notEqual, Assembler::xcc); | |
971 #endif | |
972 } | |
973 | |
974 // | |
975 // Generate overlap test for array copy stubs | |
976 // | |
977 // Input: | |
978 // O0 - array1 | |
979 // O1 - array2 | |
980 // O2 - element count | |
981 // | |
982 // Kills temps: O3, O4 | |
983 // | |
984 void array_overlap_test(address no_overlap_target, int log2_elem_size) { | |
985 assert(no_overlap_target != NULL, "must be generated"); | |
986 array_overlap_test(no_overlap_target, NULL, log2_elem_size); | |
987 } | |
988 void array_overlap_test(Label& L_no_overlap, int log2_elem_size) { | |
989 array_overlap_test(NULL, &L_no_overlap, log2_elem_size); | |
990 } | |
991 void array_overlap_test(address no_overlap_target, Label* NOLp, int log2_elem_size) { | |
992 const Register from = O0; | |
993 const Register to = O1; | |
994 const Register count = O2; | |
995 const Register to_from = O3; // to - from | |
996 const Register byte_count = O4; // count << log2_elem_size | |
997 | |
998 __ subcc(to, from, to_from); | |
999 __ sll_ptr(count, log2_elem_size, byte_count); | |
1000 if (NOLp == NULL) | |
1001 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, no_overlap_target); | |
1002 else | |
1003 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, (*NOLp)); | |
1004 __ delayed()->cmp(to_from, byte_count); | |
1005 if (NOLp == NULL) | |
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1006 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, no_overlap_target); |
0 | 1007 else |
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1008 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, (*NOLp)); |
0 | 1009 __ delayed()->nop(); |
1010 } | |
1011 | |
1012 // | |
1013 // Generate pre-write barrier for array. | |
1014 // | |
1015 // Input: | |
1016 // addr - register containing starting address | |
1017 // count - register containing element count | |
1018 // tmp - scratch register | |
1019 // | |
1020 // The input registers are overwritten. | |
1021 // | |
2324 | 1022 void gen_write_ref_array_pre_barrier(Register addr, Register count, bool dest_uninitialized) { |
0 | 1023 BarrierSet* bs = Universe::heap()->barrier_set(); |
2324 | 1024 switch (bs->kind()) { |
1025 case BarrierSet::G1SATBCT: | |
1026 case BarrierSet::G1SATBCTLogging: | |
1027 // With G1, don't generate the call if we statically know that the target in uninitialized | |
1028 if (!dest_uninitialized) { | |
1029 __ save_frame(0); | |
1030 // Save the necessary global regs... will be used after. | |
1031 if (addr->is_global()) { | |
1032 __ mov(addr, L0); | |
1033 } | |
1034 if (count->is_global()) { | |
1035 __ mov(count, L1); | |
1036 } | |
1037 __ mov(addr->after_save(), O0); | |
1038 // Get the count into O1 | |
1039 __ call(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_pre)); | |
1040 __ delayed()->mov(count->after_save(), O1); | |
1041 if (addr->is_global()) { | |
1042 __ mov(L0, addr); | |
1043 } | |
1044 if (count->is_global()) { | |
1045 __ mov(L1, count); | |
1046 } | |
1047 __ restore(); | |
1048 } | |
1049 break; | |
1050 case BarrierSet::CardTableModRef: | |
1051 case BarrierSet::CardTableExtension: | |
1052 case BarrierSet::ModRef: | |
1053 break; | |
1054 default: | |
1055 ShouldNotReachHere(); | |
0 | 1056 } |
1057 } | |
1058 // | |
1059 // Generate post-write barrier for array. | |
1060 // | |
1061 // Input: | |
1062 // addr - register containing starting address | |
1063 // count - register containing element count | |
1064 // tmp - scratch register | |
1065 // | |
1066 // The input registers are overwritten. | |
1067 // | |
1068 void gen_write_ref_array_post_barrier(Register addr, Register count, | |
2324 | 1069 Register tmp) { |
0 | 1070 BarrierSet* bs = Universe::heap()->barrier_set(); |
1071 | |
1072 switch (bs->kind()) { | |
1073 case BarrierSet::G1SATBCT: | |
1074 case BarrierSet::G1SATBCTLogging: | |
1075 { | |
1076 // Get some new fresh output registers. | |
1077 __ save_frame(0); | |
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1078 __ mov(addr->after_save(), O0); |
0 | 1079 __ call(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_post)); |
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1080 __ delayed()->mov(count->after_save(), O1); |
0 | 1081 __ restore(); |
1082 } | |
1083 break; | |
1084 case BarrierSet::CardTableModRef: | |
1085 case BarrierSet::CardTableExtension: | |
1086 { | |
1087 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | |
1088 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); | |
1089 assert_different_registers(addr, count, tmp); | |
1090 | |
1091 Label L_loop; | |
1092 | |
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1093 __ sll_ptr(count, LogBytesPerHeapOop, count); |
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1094 __ sub(count, BytesPerHeapOop, count); |
0 | 1095 __ add(count, addr, count); |
1096 // Use two shifts to clear out those low order two bits! (Cannot opt. into 1.) | |
1097 __ srl_ptr(addr, CardTableModRefBS::card_shift, addr); | |
1098 __ srl_ptr(count, CardTableModRefBS::card_shift, count); | |
1099 __ sub(count, addr, count); | |
727 | 1100 AddressLiteral rs(ct->byte_map_base); |
1101 __ set(rs, tmp); | |
0 | 1102 __ BIND(L_loop); |
727 | 1103 __ stb(G0, tmp, addr); |
0 | 1104 __ subcc(count, 1, count); |
1105 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
1106 __ delayed()->add(addr, 1, addr); | |
727 | 1107 } |
0 | 1108 break; |
1109 case BarrierSet::ModRef: | |
1110 break; | |
727 | 1111 default: |
0 | 1112 ShouldNotReachHere(); |
1113 } | |
1114 } | |
1115 | |
3903 | 1116 // |
1117 // Generate main code for disjoint arraycopy | |
1118 // | |
1119 typedef void (StubGenerator::*CopyLoopFunc)(Register from, Register to, Register count, int count_dec, | |
1120 Label& L_loop, bool use_prefetch, bool use_bis); | |
1121 | |
1122 void disjoint_copy_core(Register from, Register to, Register count, int log2_elem_size, | |
1123 int iter_size, CopyLoopFunc copy_loop_func) { | |
1124 Label L_copy; | |
1125 | |
1126 assert(log2_elem_size <= 3, "the following code should be changed"); | |
1127 int count_dec = 16>>log2_elem_size; | |
1128 | |
1129 int prefetch_dist = MAX2(ArraycopySrcPrefetchDistance, ArraycopyDstPrefetchDistance); | |
1130 assert(prefetch_dist < 4096, "invalid value"); | |
1131 prefetch_dist = (prefetch_dist + (iter_size-1)) & (-iter_size); // round up to one iteration copy size | |
1132 int prefetch_count = (prefetch_dist >> log2_elem_size); // elements count | |
1133 | |
1134 if (UseBlockCopy) { | |
1135 Label L_block_copy, L_block_copy_prefetch, L_skip_block_copy; | |
1136 | |
1137 // 64 bytes tail + bytes copied in one loop iteration | |
1138 int tail_size = 64 + iter_size; | |
1139 int block_copy_count = (MAX2(tail_size, (int)BlockCopyLowLimit)) >> log2_elem_size; | |
1140 // Use BIS copy only for big arrays since it requires membar. | |
1141 __ set(block_copy_count, O4); | |
1142 __ cmp_and_br_short(count, O4, Assembler::lessUnsigned, Assembler::pt, L_skip_block_copy); | |
1143 // This code is for disjoint source and destination: | |
1144 // to <= from || to >= from+count | |
1145 // but BIS will stomp over 'from' if (to > from-tail_size && to <= from) | |
1146 __ sub(from, to, O4); | |
1147 __ srax(O4, 4, O4); // divide by 16 since following short branch have only 5 bits for imm. | |
1148 __ cmp_and_br_short(O4, (tail_size>>4), Assembler::lessEqualUnsigned, Assembler::pn, L_skip_block_copy); | |
1149 | |
1150 __ wrasi(G0, Assembler::ASI_ST_BLKINIT_PRIMARY); | |
1151 // BIS should not be used to copy tail (64 bytes+iter_size) | |
1152 // to avoid zeroing of following values. | |
1153 __ sub(count, (tail_size>>log2_elem_size), count); // count is still positive >= 0 | |
1154 | |
1155 if (prefetch_count > 0) { // rounded up to one iteration count | |
1156 // Do prefetching only if copy size is bigger | |
1157 // than prefetch distance. | |
1158 __ set(prefetch_count, O4); | |
1159 __ cmp_and_brx_short(count, O4, Assembler::less, Assembler::pt, L_block_copy); | |
1160 __ sub(count, prefetch_count, count); | |
1161 | |
1162 (this->*copy_loop_func)(from, to, count, count_dec, L_block_copy_prefetch, true, true); | |
1163 __ add(count, prefetch_count, count); // restore count | |
1164 | |
1165 } // prefetch_count > 0 | |
1166 | |
1167 (this->*copy_loop_func)(from, to, count, count_dec, L_block_copy, false, true); | |
1168 __ add(count, (tail_size>>log2_elem_size), count); // restore count | |
1169 | |
1170 __ wrasi(G0, Assembler::ASI_PRIMARY_NOFAULT); | |
1171 // BIS needs membar. | |
1172 __ membar(Assembler::StoreLoad); | |
1173 // Copy tail | |
1174 __ ba_short(L_copy); | |
1175 | |
1176 __ BIND(L_skip_block_copy); | |
1177 } // UseBlockCopy | |
1178 | |
1179 if (prefetch_count > 0) { // rounded up to one iteration count | |
1180 // Do prefetching only if copy size is bigger | |
1181 // than prefetch distance. | |
1182 __ set(prefetch_count, O4); | |
1183 __ cmp_and_brx_short(count, O4, Assembler::lessUnsigned, Assembler::pt, L_copy); | |
1184 __ sub(count, prefetch_count, count); | |
1185 | |
1186 Label L_copy_prefetch; | |
1187 (this->*copy_loop_func)(from, to, count, count_dec, L_copy_prefetch, true, false); | |
1188 __ add(count, prefetch_count, count); // restore count | |
1189 | |
1190 } // prefetch_count > 0 | |
1191 | |
1192 (this->*copy_loop_func)(from, to, count, count_dec, L_copy, false, false); | |
1193 } | |
1194 | |
1195 | |
1196 | |
1197 // | |
1198 // Helper methods for copy_16_bytes_forward_with_shift() | |
1199 // | |
1200 void copy_16_bytes_shift_loop(Register from, Register to, Register count, int count_dec, | |
1201 Label& L_loop, bool use_prefetch, bool use_bis) { | |
1202 | |
1203 const Register left_shift = G1; // left shift bit counter | |
1204 const Register right_shift = G5; // right shift bit counter | |
1205 | |
1206 __ align(OptoLoopAlignment); | |
1207 __ BIND(L_loop); | |
1208 if (use_prefetch) { | |
1209 if (ArraycopySrcPrefetchDistance > 0) { | |
1210 __ prefetch(from, ArraycopySrcPrefetchDistance, Assembler::severalReads); | |
1211 } | |
1212 if (ArraycopyDstPrefetchDistance > 0) { | |
1213 __ prefetch(to, ArraycopyDstPrefetchDistance, Assembler::severalWritesAndPossiblyReads); | |
1214 } | |
1215 } | |
1216 __ ldx(from, 0, O4); | |
1217 __ ldx(from, 8, G4); | |
1218 __ inc(to, 16); | |
1219 __ inc(from, 16); | |
1220 __ deccc(count, count_dec); // Can we do next iteration after this one? | |
1221 __ srlx(O4, right_shift, G3); | |
1222 __ bset(G3, O3); | |
1223 __ sllx(O4, left_shift, O4); | |
1224 __ srlx(G4, right_shift, G3); | |
1225 __ bset(G3, O4); | |
1226 if (use_bis) { | |
1227 __ stxa(O3, to, -16); | |
1228 __ stxa(O4, to, -8); | |
1229 } else { | |
1230 __ stx(O3, to, -16); | |
1231 __ stx(O4, to, -8); | |
1232 } | |
1233 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
1234 __ delayed()->sllx(G4, left_shift, O3); | |
1235 } | |
0 | 1236 |
1237 // Copy big chunks forward with shift | |
1238 // | |
1239 // Inputs: | |
1240 // from - source arrays | |
1241 // to - destination array aligned to 8-bytes | |
1242 // count - elements count to copy >= the count equivalent to 16 bytes | |
1243 // count_dec - elements count's decrement equivalent to 16 bytes | |
1244 // L_copy_bytes - copy exit label | |
1245 // | |
1246 void copy_16_bytes_forward_with_shift(Register from, Register to, | |
3903 | 1247 Register count, int log2_elem_size, Label& L_copy_bytes) { |
1248 Label L_aligned_copy, L_copy_last_bytes; | |
1249 assert(log2_elem_size <= 3, "the following code should be changed"); | |
1250 int count_dec = 16>>log2_elem_size; | |
0 | 1251 |
1252 // if both arrays have the same alignment mod 8, do 8 bytes aligned copy | |
3903 | 1253 __ andcc(from, 7, G1); // misaligned bytes |
1254 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
1255 __ delayed()->nop(); | |
0 | 1256 |
1257 const Register left_shift = G1; // left shift bit counter | |
1258 const Register right_shift = G5; // right shift bit counter | |
1259 | |
3903 | 1260 __ sll(G1, LogBitsPerByte, left_shift); |
1261 __ mov(64, right_shift); | |
1262 __ sub(right_shift, left_shift, right_shift); | |
0 | 1263 |
1264 // | |
1265 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
1266 // to form 2 aligned 8-bytes chunks to store. | |
1267 // | |
3903 | 1268 __ dec(count, count_dec); // Pre-decrement 'count' |
1269 __ andn(from, 7, from); // Align address | |
1270 __ ldx(from, 0, O3); | |
1271 __ inc(from, 8); | |
1272 __ sllx(O3, left_shift, O3); | |
1273 | |
1274 disjoint_copy_core(from, to, count, log2_elem_size, 16, copy_16_bytes_shift_loop); | |
1275 | |
1276 __ inccc(count, count_dec>>1 ); // + 8 bytes | |
1277 __ brx(Assembler::negative, true, Assembler::pn, L_copy_last_bytes); | |
1278 __ delayed()->inc(count, count_dec>>1); // restore 'count' | |
1279 | |
1280 // copy 8 bytes, part of them already loaded in O3 | |
1281 __ ldx(from, 0, O4); | |
1282 __ inc(to, 8); | |
1283 __ inc(from, 8); | |
1284 __ srlx(O4, right_shift, G3); | |
1285 __ bset(O3, G3); | |
1286 __ stx(G3, to, -8); | |
0 | 1287 |
1288 __ BIND(L_copy_last_bytes); | |
3903 | 1289 __ srl(right_shift, LogBitsPerByte, right_shift); // misaligned bytes |
1290 __ br(Assembler::always, false, Assembler::pt, L_copy_bytes); | |
1291 __ delayed()->sub(from, right_shift, from); // restore address | |
0 | 1292 |
1293 __ BIND(L_aligned_copy); | |
1294 } | |
1295 | |
1296 // Copy big chunks backward with shift | |
1297 // | |
1298 // Inputs: | |
1299 // end_from - source arrays end address | |
1300 // end_to - destination array end address aligned to 8-bytes | |
1301 // count - elements count to copy >= the count equivalent to 16 bytes | |
1302 // count_dec - elements count's decrement equivalent to 16 bytes | |
1303 // L_aligned_copy - aligned copy exit label | |
1304 // L_copy_bytes - copy exit label | |
1305 // | |
1306 void copy_16_bytes_backward_with_shift(Register end_from, Register end_to, | |
1307 Register count, int count_dec, | |
1308 Label& L_aligned_copy, Label& L_copy_bytes) { | |
1309 Label L_loop, L_copy_last_bytes; | |
1310 | |
1311 // if both arrays have the same alignment mod 8, do 8 bytes aligned copy | |
1312 __ andcc(end_from, 7, G1); // misaligned bytes | |
1313 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
1314 __ delayed()->deccc(count, count_dec); // Pre-decrement 'count' | |
1315 | |
1316 const Register left_shift = G1; // left shift bit counter | |
1317 const Register right_shift = G5; // right shift bit counter | |
1318 | |
1319 __ sll(G1, LogBitsPerByte, left_shift); | |
1320 __ mov(64, right_shift); | |
1321 __ sub(right_shift, left_shift, right_shift); | |
1322 | |
1323 // | |
1324 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
1325 // to form 2 aligned 8-bytes chunks to store. | |
1326 // | |
1327 __ andn(end_from, 7, end_from); // Align address | |
1328 __ ldx(end_from, 0, O3); | |
1365 | 1329 __ align(OptoLoopAlignment); |
0 | 1330 __ BIND(L_loop); |
1331 __ ldx(end_from, -8, O4); | |
1332 __ deccc(count, count_dec); // Can we do next iteration after this one? | |
1333 __ ldx(end_from, -16, G4); | |
1334 __ dec(end_to, 16); | |
1335 __ dec(end_from, 16); | |
1336 __ srlx(O3, right_shift, O3); | |
1337 __ sllx(O4, left_shift, G3); | |
1338 __ bset(G3, O3); | |
1339 __ stx(O3, end_to, 8); | |
1340 __ srlx(O4, right_shift, O4); | |
1341 __ sllx(G4, left_shift, G3); | |
1342 __ bset(G3, O4); | |
1343 __ stx(O4, end_to, 0); | |
1344 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
1345 __ delayed()->mov(G4, O3); | |
1346 | |
1347 __ inccc(count, count_dec>>1 ); // + 8 bytes | |
1348 __ brx(Assembler::negative, true, Assembler::pn, L_copy_last_bytes); | |
1349 __ delayed()->inc(count, count_dec>>1); // restore 'count' | |
1350 | |
1351 // copy 8 bytes, part of them already loaded in O3 | |
1352 __ ldx(end_from, -8, O4); | |
1353 __ dec(end_to, 8); | |
1354 __ dec(end_from, 8); | |
1355 __ srlx(O3, right_shift, O3); | |
1356 __ sllx(O4, left_shift, G3); | |
1357 __ bset(O3, G3); | |
1358 __ stx(G3, end_to, 0); | |
1359 | |
1360 __ BIND(L_copy_last_bytes); | |
1361 __ srl(left_shift, LogBitsPerByte, left_shift); // misaligned bytes | |
1362 __ br(Assembler::always, false, Assembler::pt, L_copy_bytes); | |
1363 __ delayed()->add(end_from, left_shift, end_from); // restore address | |
1364 } | |
1365 | |
1366 // | |
1367 // Generate stub for disjoint byte copy. If "aligned" is true, the | |
1368 // "from" and "to" addresses are assumed to be heapword aligned. | |
1369 // | |
1370 // Arguments for generated stub: | |
1371 // from: O0 | |
1372 // to: O1 | |
1373 // count: O2 treated as signed | |
1374 // | |
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1375 address generate_disjoint_byte_copy(bool aligned, address *entry, const char *name) { |
0 | 1376 __ align(CodeEntryAlignment); |
1377 StubCodeMark mark(this, "StubRoutines", name); | |
1378 address start = __ pc(); | |
1379 | |
1380 Label L_skip_alignment, L_align; | |
1381 Label L_copy_byte, L_copy_byte_loop, L_exit; | |
1382 | |
1383 const Register from = O0; // source array address | |
1384 const Register to = O1; // destination array address | |
1385 const Register count = O2; // elements count | |
1386 const Register offset = O5; // offset from start of arrays | |
1387 // O3, O4, G3, G4 are used as temp registers | |
1388 | |
1389 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1390 | |
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1391 if (entry != NULL) { |
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1392 *entry = __ pc(); |
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1393 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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1394 BLOCK_COMMENT("Entry:"); |
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1395 } |
0 | 1396 |
1397 // for short arrays, just do single element copy | |
1398 __ cmp(count, 23); // 16 + 7 | |
1399 __ brx(Assembler::less, false, Assembler::pn, L_copy_byte); | |
1400 __ delayed()->mov(G0, offset); | |
1401 | |
1402 if (aligned) { | |
1403 // 'aligned' == true when it is known statically during compilation | |
1404 // of this arraycopy call site that both 'from' and 'to' addresses | |
1405 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
1406 // | |
1407 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
1408 // and 8 bytes - in 64-bits VM. So we do it only for 32-bits VM | |
1409 // | |
1410 #ifndef _LP64 | |
1411 // copy a 4-bytes word if necessary to align 'to' to 8 bytes | |
1412 __ andcc(to, 7, G0); | |
1413 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment); | |
1414 __ delayed()->ld(from, 0, O3); | |
1415 __ inc(from, 4); | |
1416 __ inc(to, 4); | |
1417 __ dec(count, 4); | |
1418 __ st(O3, to, -4); | |
1419 __ BIND(L_skip_alignment); | |
1420 #endif | |
1421 } else { | |
1422 // copy bytes to align 'to' on 8 byte boundary | |
1423 __ andcc(to, 7, G1); // misaligned bytes | |
1424 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1425 __ delayed()->neg(G1); | |
1426 __ inc(G1, 8); // bytes need to copy to next 8-bytes alignment | |
1427 __ sub(count, G1, count); | |
1428 __ BIND(L_align); | |
1429 __ ldub(from, 0, O3); | |
1430 __ deccc(G1); | |
1431 __ inc(from); | |
1432 __ stb(O3, to, 0); | |
1433 __ br(Assembler::notZero, false, Assembler::pt, L_align); | |
1434 __ delayed()->inc(to); | |
1435 __ BIND(L_skip_alignment); | |
1436 } | |
1437 #ifdef _LP64 | |
1438 if (!aligned) | |
1439 #endif | |
1440 { | |
1441 // Copy with shift 16 bytes per iteration if arrays do not have | |
1442 // the same alignment mod 8, otherwise fall through to the next | |
1443 // code for aligned copy. | |
1444 // The compare above (count >= 23) guarantes 'count' >= 16 bytes. | |
1445 // Also jump over aligned copy after the copy with shift completed. | |
1446 | |
3903 | 1447 copy_16_bytes_forward_with_shift(from, to, count, 0, L_copy_byte); |
0 | 1448 } |
1449 | |
1450 // Both array are 8 bytes aligned, copy 16 bytes at a time | |
1451 __ and3(count, 7, G4); // Save count | |
1452 __ srl(count, 3, count); | |
1453 generate_disjoint_long_copy_core(aligned); | |
1454 __ mov(G4, count); // Restore count | |
1455 | |
1456 // copy tailing bytes | |
1457 __ BIND(L_copy_byte); | |
3839 | 1458 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
1365 | 1459 __ align(OptoLoopAlignment); |
0 | 1460 __ BIND(L_copy_byte_loop); |
1461 __ ldub(from, offset, O3); | |
1462 __ deccc(count); | |
1463 __ stb(O3, to, offset); | |
1464 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_byte_loop); | |
1465 __ delayed()->inc(offset); | |
1466 | |
1467 __ BIND(L_exit); | |
1468 // O3, O4 are used as temp registers | |
1469 inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr, O3, O4); | |
1470 __ retl(); | |
1471 __ delayed()->mov(G0, O0); // return 0 | |
1472 return start; | |
1473 } | |
1474 | |
1475 // | |
1476 // Generate stub for conjoint byte copy. If "aligned" is true, the | |
1477 // "from" and "to" addresses are assumed to be heapword aligned. | |
1478 // | |
1479 // Arguments for generated stub: | |
1480 // from: O0 | |
1481 // to: O1 | |
1482 // count: O2 treated as signed | |
1483 // | |
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1484 address generate_conjoint_byte_copy(bool aligned, address nooverlap_target, |
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1485 address *entry, const char *name) { |
0 | 1486 // Do reverse copy. |
1487 | |
1488 __ align(CodeEntryAlignment); | |
1489 StubCodeMark mark(this, "StubRoutines", name); | |
1490 address start = __ pc(); | |
1491 | |
1492 Label L_skip_alignment, L_align, L_aligned_copy; | |
1493 Label L_copy_byte, L_copy_byte_loop, L_exit; | |
1494 | |
1495 const Register from = O0; // source array address | |
1496 const Register to = O1; // destination array address | |
1497 const Register count = O2; // elements count | |
1498 const Register end_from = from; // source array end address | |
1499 const Register end_to = to; // destination array end address | |
1500 | |
1501 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1502 | |
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1503 if (entry != NULL) { |
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1504 *entry = __ pc(); |
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1505 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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1506 BLOCK_COMMENT("Entry:"); |
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1507 } |
0 | 1508 |
1509 array_overlap_test(nooverlap_target, 0); | |
1510 | |
1511 __ add(to, count, end_to); // offset after last copied element | |
1512 | |
1513 // for short arrays, just do single element copy | |
1514 __ cmp(count, 23); // 16 + 7 | |
1515 __ brx(Assembler::less, false, Assembler::pn, L_copy_byte); | |
1516 __ delayed()->add(from, count, end_from); | |
1517 | |
1518 { | |
1519 // Align end of arrays since they could be not aligned even | |
1520 // when arrays itself are aligned. | |
1521 | |
1522 // copy bytes to align 'end_to' on 8 byte boundary | |
1523 __ andcc(end_to, 7, G1); // misaligned bytes | |
1524 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1525 __ delayed()->nop(); | |
1526 __ sub(count, G1, count); | |
1527 __ BIND(L_align); | |
1528 __ dec(end_from); | |
1529 __ dec(end_to); | |
1530 __ ldub(end_from, 0, O3); | |
1531 __ deccc(G1); | |
1532 __ brx(Assembler::notZero, false, Assembler::pt, L_align); | |
1533 __ delayed()->stb(O3, end_to, 0); | |
1534 __ BIND(L_skip_alignment); | |
1535 } | |
1536 #ifdef _LP64 | |
1537 if (aligned) { | |
1538 // Both arrays are aligned to 8-bytes in 64-bits VM. | |
1539 // The 'count' is decremented in copy_16_bytes_backward_with_shift() | |
1540 // in unaligned case. | |
1541 __ dec(count, 16); | |
1542 } else | |
1543 #endif | |
1544 { | |
1545 // Copy with shift 16 bytes per iteration if arrays do not have | |
1546 // the same alignment mod 8, otherwise jump to the next | |
1547 // code for aligned copy (and substracting 16 from 'count' before jump). | |
1548 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
1549 // Also jump over aligned copy after the copy with shift completed. | |
1550 | |
1551 copy_16_bytes_backward_with_shift(end_from, end_to, count, 16, | |
1552 L_aligned_copy, L_copy_byte); | |
1553 } | |
1554 // copy 4 elements (16 bytes) at a time | |
1365 | 1555 __ align(OptoLoopAlignment); |
0 | 1556 __ BIND(L_aligned_copy); |
1557 __ dec(end_from, 16); | |
1558 __ ldx(end_from, 8, O3); | |
1559 __ ldx(end_from, 0, O4); | |
1560 __ dec(end_to, 16); | |
1561 __ deccc(count, 16); | |
1562 __ stx(O3, end_to, 8); | |
1563 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
1564 __ delayed()->stx(O4, end_to, 0); | |
1565 __ inc(count, 16); | |
1566 | |
1567 // copy 1 element (2 bytes) at a time | |
1568 __ BIND(L_copy_byte); | |
3839 | 1569 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
1365 | 1570 __ align(OptoLoopAlignment); |
0 | 1571 __ BIND(L_copy_byte_loop); |
1572 __ dec(end_from); | |
1573 __ dec(end_to); | |
1574 __ ldub(end_from, 0, O4); | |
1575 __ deccc(count); | |
1576 __ brx(Assembler::greater, false, Assembler::pt, L_copy_byte_loop); | |
1577 __ delayed()->stb(O4, end_to, 0); | |
1578 | |
1579 __ BIND(L_exit); | |
1580 // O3, O4 are used as temp registers | |
1581 inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr, O3, O4); | |
1582 __ retl(); | |
1583 __ delayed()->mov(G0, O0); // return 0 | |
1584 return start; | |
1585 } | |
1586 | |
1587 // | |
1588 // Generate stub for disjoint short copy. If "aligned" is true, the | |
1589 // "from" and "to" addresses are assumed to be heapword aligned. | |
1590 // | |
1591 // Arguments for generated stub: | |
1592 // from: O0 | |
1593 // to: O1 | |
1594 // count: O2 treated as signed | |
1595 // | |
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1596 address generate_disjoint_short_copy(bool aligned, address *entry, const char * name) { |
0 | 1597 __ align(CodeEntryAlignment); |
1598 StubCodeMark mark(this, "StubRoutines", name); | |
1599 address start = __ pc(); | |
1600 | |
1601 Label L_skip_alignment, L_skip_alignment2; | |
1602 Label L_copy_2_bytes, L_copy_2_bytes_loop, L_exit; | |
1603 | |
1604 const Register from = O0; // source array address | |
1605 const Register to = O1; // destination array address | |
1606 const Register count = O2; // elements count | |
1607 const Register offset = O5; // offset from start of arrays | |
1608 // O3, O4, G3, G4 are used as temp registers | |
1609 | |
1610 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1611 | |
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1612 if (entry != NULL) { |
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1613 *entry = __ pc(); |
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1614 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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1615 BLOCK_COMMENT("Entry:"); |
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1616 } |
0 | 1617 |
1618 // for short arrays, just do single element copy | |
1619 __ cmp(count, 11); // 8 + 3 (22 bytes) | |
1620 __ brx(Assembler::less, false, Assembler::pn, L_copy_2_bytes); | |
1621 __ delayed()->mov(G0, offset); | |
1622 | |
1623 if (aligned) { | |
1624 // 'aligned' == true when it is known statically during compilation | |
1625 // of this arraycopy call site that both 'from' and 'to' addresses | |
1626 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
1627 // | |
1628 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
1629 // and 8 bytes - in 64-bits VM. | |
1630 // | |
1631 #ifndef _LP64 | |
1632 // copy a 2-elements word if necessary to align 'to' to 8 bytes | |
1633 __ andcc(to, 7, G0); | |
1634 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1635 __ delayed()->ld(from, 0, O3); | |
1636 __ inc(from, 4); | |
1637 __ inc(to, 4); | |
1638 __ dec(count, 2); | |
1639 __ st(O3, to, -4); | |
1640 __ BIND(L_skip_alignment); | |
1641 #endif | |
1642 } else { | |
1643 // copy 1 element if necessary to align 'to' on an 4 bytes | |
1644 __ andcc(to, 3, G0); | |
1645 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1646 __ delayed()->lduh(from, 0, O3); | |
1647 __ inc(from, 2); | |
1648 __ inc(to, 2); | |
1649 __ dec(count); | |
1650 __ sth(O3, to, -2); | |
1651 __ BIND(L_skip_alignment); | |
1652 | |
1653 // copy 2 elements to align 'to' on an 8 byte boundary | |
1654 __ andcc(to, 7, G0); | |
1655 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment2); | |
1656 __ delayed()->lduh(from, 0, O3); | |
1657 __ dec(count, 2); | |
1658 __ lduh(from, 2, O4); | |
1659 __ inc(from, 4); | |
1660 __ inc(to, 4); | |
1661 __ sth(O3, to, -4); | |
1662 __ sth(O4, to, -2); | |
1663 __ BIND(L_skip_alignment2); | |
1664 } | |
1665 #ifdef _LP64 | |
1666 if (!aligned) | |
1667 #endif | |
1668 { | |
1669 // Copy with shift 16 bytes per iteration if arrays do not have | |
1670 // the same alignment mod 8, otherwise fall through to the next | |
1671 // code for aligned copy. | |
1672 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
1673 // Also jump over aligned copy after the copy with shift completed. | |
1674 | |
3903 | 1675 copy_16_bytes_forward_with_shift(from, to, count, 1, L_copy_2_bytes); |
0 | 1676 } |
1677 | |
1678 // Both array are 8 bytes aligned, copy 16 bytes at a time | |
1679 __ and3(count, 3, G4); // Save | |
1680 __ srl(count, 2, count); | |
1681 generate_disjoint_long_copy_core(aligned); | |
1682 __ mov(G4, count); // restore | |
1683 | |
1684 // copy 1 element at a time | |
1685 __ BIND(L_copy_2_bytes); | |
3839 | 1686 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
1365 | 1687 __ align(OptoLoopAlignment); |
0 | 1688 __ BIND(L_copy_2_bytes_loop); |
1689 __ lduh(from, offset, O3); | |
1690 __ deccc(count); | |
1691 __ sth(O3, to, offset); | |
1692 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_2_bytes_loop); | |
1693 __ delayed()->inc(offset, 2); | |
1694 | |
1695 __ BIND(L_exit); | |
1696 // O3, O4 are used as temp registers | |
1697 inc_counter_np(SharedRuntime::_jshort_array_copy_ctr, O3, O4); | |
1698 __ retl(); | |
1699 __ delayed()->mov(G0, O0); // return 0 | |
1700 return start; | |
1701 } | |
1702 | |
1703 // | |
1763 | 1704 // Generate stub for disjoint short fill. If "aligned" is true, the |
1705 // "to" address is assumed to be heapword aligned. | |
1706 // | |
1707 // Arguments for generated stub: | |
1708 // to: O0 | |
1709 // value: O1 | |
1710 // count: O2 treated as signed | |
1711 // | |
1712 address generate_fill(BasicType t, bool aligned, const char* name) { | |
1713 __ align(CodeEntryAlignment); | |
1714 StubCodeMark mark(this, "StubRoutines", name); | |
1715 address start = __ pc(); | |
1716 | |
1717 const Register to = O0; // source array address | |
1718 const Register value = O1; // fill value | |
1719 const Register count = O2; // elements count | |
1720 // O3 is used as a temp register | |
1721 | |
1722 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1723 | |
1724 Label L_exit, L_skip_align1, L_skip_align2, L_fill_byte; | |
1794 | 1725 Label L_fill_2_bytes, L_fill_elements, L_fill_32_bytes; |
1763 | 1726 |
1727 int shift = -1; | |
1728 switch (t) { | |
1729 case T_BYTE: | |
1730 shift = 2; | |
1731 break; | |
1732 case T_SHORT: | |
1733 shift = 1; | |
1734 break; | |
1735 case T_INT: | |
1736 shift = 0; | |
1737 break; | |
1738 default: ShouldNotReachHere(); | |
1739 } | |
1740 | |
1741 BLOCK_COMMENT("Entry:"); | |
1742 | |
1743 if (t == T_BYTE) { | |
1744 // Zero extend value | |
1745 __ and3(value, 0xff, value); | |
1746 __ sllx(value, 8, O3); | |
1747 __ or3(value, O3, value); | |
1748 } | |
1749 if (t == T_SHORT) { | |
1750 // Zero extend value | |
1794 | 1751 __ sllx(value, 48, value); |
1752 __ srlx(value, 48, value); | |
1763 | 1753 } |
1754 if (t == T_BYTE || t == T_SHORT) { | |
1755 __ sllx(value, 16, O3); | |
1756 __ or3(value, O3, value); | |
1757 } | |
1758 | |
1759 __ cmp(count, 2<<shift); // Short arrays (< 8 bytes) fill by element | |
1794 | 1760 __ brx(Assembler::lessUnsigned, false, Assembler::pn, L_fill_elements); // use unsigned cmp |
1761 __ delayed()->andcc(count, 1, G0); | |
1763 | 1762 |
1763 if (!aligned && (t == T_BYTE || t == T_SHORT)) { | |
1764 // align source address at 4 bytes address boundary | |
1765 if (t == T_BYTE) { | |
1766 // One byte misalignment happens only for byte arrays | |
1767 __ andcc(to, 1, G0); | |
1768 __ br(Assembler::zero, false, Assembler::pt, L_skip_align1); | |
1769 __ delayed()->nop(); | |
1770 __ stb(value, to, 0); | |
1771 __ inc(to, 1); | |
1772 __ dec(count, 1); | |
1773 __ BIND(L_skip_align1); | |
1774 } | |
1775 // Two bytes misalignment happens only for byte and short (char) arrays | |
1776 __ andcc(to, 2, G0); | |
1777 __ br(Assembler::zero, false, Assembler::pt, L_skip_align2); | |
1778 __ delayed()->nop(); | |
1779 __ sth(value, to, 0); | |
1780 __ inc(to, 2); | |
1781 __ dec(count, 1 << (shift - 1)); | |
1782 __ BIND(L_skip_align2); | |
1783 } | |
1784 #ifdef _LP64 | |
1785 if (!aligned) { | |
1786 #endif | |
1787 // align to 8 bytes, we know we are 4 byte aligned to start | |
1788 __ andcc(to, 7, G0); | |
1789 __ br(Assembler::zero, false, Assembler::pt, L_fill_32_bytes); | |
1790 __ delayed()->nop(); | |
1791 __ stw(value, to, 0); | |
1792 __ inc(to, 4); | |
1793 __ dec(count, 1 << shift); | |
1794 __ BIND(L_fill_32_bytes); | |
1795 #ifdef _LP64 | |
1796 } | |
1797 #endif | |
1798 | |
1799 if (t == T_INT) { | |
1800 // Zero extend value | |
1801 __ srl(value, 0, value); | |
1802 } | |
1803 if (t == T_BYTE || t == T_SHORT || t == T_INT) { | |
1804 __ sllx(value, 32, O3); | |
1805 __ or3(value, O3, value); | |
1806 } | |
1807 | |
1782 | 1808 Label L_check_fill_8_bytes; |
1809 // Fill 32-byte chunks | |
1810 __ subcc(count, 8 << shift, count); | |
1811 __ brx(Assembler::less, false, Assembler::pt, L_check_fill_8_bytes); | |
1812 __ delayed()->nop(); | |
1813 | |
1794 | 1814 Label L_fill_32_bytes_loop, L_fill_4_bytes; |
1763 | 1815 __ align(16); |
1816 __ BIND(L_fill_32_bytes_loop); | |
1817 | |
1818 __ stx(value, to, 0); | |
1819 __ stx(value, to, 8); | |
1820 __ stx(value, to, 16); | |
1821 __ stx(value, to, 24); | |
1822 | |
1823 __ subcc(count, 8 << shift, count); | |
1824 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_fill_32_bytes_loop); | |
1825 __ delayed()->add(to, 32, to); | |
1826 | |
1827 __ BIND(L_check_fill_8_bytes); | |
1828 __ addcc(count, 8 << shift, count); | |
1829 __ brx(Assembler::zero, false, Assembler::pn, L_exit); | |
1830 __ delayed()->subcc(count, 1 << (shift + 1), count); | |
1831 __ brx(Assembler::less, false, Assembler::pn, L_fill_4_bytes); | |
1832 __ delayed()->andcc(count, 1<<shift, G0); | |
1833 | |
1834 // | |
1835 // length is too short, just fill 8 bytes at a time | |
1836 // | |
1837 Label L_fill_8_bytes_loop; | |
1838 __ BIND(L_fill_8_bytes_loop); | |
1839 __ stx(value, to, 0); | |
1840 __ subcc(count, 1 << (shift + 1), count); | |
1841 __ brx(Assembler::greaterEqual, false, Assembler::pn, L_fill_8_bytes_loop); | |
1842 __ delayed()->add(to, 8, to); | |
1843 | |
1844 // fill trailing 4 bytes | |
1845 __ andcc(count, 1<<shift, G0); // in delay slot of branches | |
1794 | 1846 if (t == T_INT) { |
1847 __ BIND(L_fill_elements); | |
1848 } | |
1763 | 1849 __ BIND(L_fill_4_bytes); |
1850 __ brx(Assembler::zero, false, Assembler::pt, L_fill_2_bytes); | |
1851 if (t == T_BYTE || t == T_SHORT) { | |
1852 __ delayed()->andcc(count, 1<<(shift-1), G0); | |
1853 } else { | |
1854 __ delayed()->nop(); | |
1855 } | |
1856 __ stw(value, to, 0); | |
1857 if (t == T_BYTE || t == T_SHORT) { | |
1858 __ inc(to, 4); | |
1859 // fill trailing 2 bytes | |
1860 __ andcc(count, 1<<(shift-1), G0); // in delay slot of branches | |
1861 __ BIND(L_fill_2_bytes); | |
1862 __ brx(Assembler::zero, false, Assembler::pt, L_fill_byte); | |
1863 __ delayed()->andcc(count, 1, count); | |
1864 __ sth(value, to, 0); | |
1865 if (t == T_BYTE) { | |
1866 __ inc(to, 2); | |
1867 // fill trailing byte | |
1868 __ andcc(count, 1, count); // in delay slot of branches | |
1869 __ BIND(L_fill_byte); | |
1870 __ brx(Assembler::zero, false, Assembler::pt, L_exit); | |
1871 __ delayed()->nop(); | |
1872 __ stb(value, to, 0); | |
1873 } else { | |
1874 __ BIND(L_fill_byte); | |
1875 } | |
1876 } else { | |
1877 __ BIND(L_fill_2_bytes); | |
1878 } | |
1879 __ BIND(L_exit); | |
1880 __ retl(); | |
1794 | 1881 __ delayed()->nop(); |
1882 | |
1883 // Handle copies less than 8 bytes. Int is handled elsewhere. | |
1884 if (t == T_BYTE) { | |
1885 __ BIND(L_fill_elements); | |
1886 Label L_fill_2, L_fill_4; | |
1887 // in delay slot __ andcc(count, 1, G0); | |
1888 __ brx(Assembler::zero, false, Assembler::pt, L_fill_2); | |
1889 __ delayed()->andcc(count, 2, G0); | |
1890 __ stb(value, to, 0); | |
1891 __ inc(to, 1); | |
1892 __ BIND(L_fill_2); | |
1893 __ brx(Assembler::zero, false, Assembler::pt, L_fill_4); | |
1894 __ delayed()->andcc(count, 4, G0); | |
1895 __ stb(value, to, 0); | |
1896 __ stb(value, to, 1); | |
1897 __ inc(to, 2); | |
1898 __ BIND(L_fill_4); | |
1899 __ brx(Assembler::zero, false, Assembler::pt, L_exit); | |
1900 __ delayed()->nop(); | |
1901 __ stb(value, to, 0); | |
1902 __ stb(value, to, 1); | |
1903 __ stb(value, to, 2); | |
1904 __ retl(); | |
1905 __ delayed()->stb(value, to, 3); | |
1906 } | |
1907 | |
1908 if (t == T_SHORT) { | |
1909 Label L_fill_2; | |
1910 __ BIND(L_fill_elements); | |
1911 // in delay slot __ andcc(count, 1, G0); | |
1912 __ brx(Assembler::zero, false, Assembler::pt, L_fill_2); | |
1913 __ delayed()->andcc(count, 2, G0); | |
1914 __ sth(value, to, 0); | |
1915 __ inc(to, 2); | |
1916 __ BIND(L_fill_2); | |
1917 __ brx(Assembler::zero, false, Assembler::pt, L_exit); | |
1918 __ delayed()->nop(); | |
1919 __ sth(value, to, 0); | |
1920 __ retl(); | |
1921 __ delayed()->sth(value, to, 2); | |
1922 } | |
1763 | 1923 return start; |
1924 } | |
1925 | |
1926 // | |
0 | 1927 // Generate stub for conjoint short copy. If "aligned" is true, the |
1928 // "from" and "to" addresses are assumed to be heapword aligned. | |
1929 // | |
1930 // Arguments for generated stub: | |
1931 // from: O0 | |
1932 // to: O1 | |
1933 // count: O2 treated as signed | |
1934 // | |
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1935 address generate_conjoint_short_copy(bool aligned, address nooverlap_target, |
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1936 address *entry, const char *name) { |
0 | 1937 // Do reverse copy. |
1938 | |
1939 __ align(CodeEntryAlignment); | |
1940 StubCodeMark mark(this, "StubRoutines", name); | |
1941 address start = __ pc(); | |
1942 | |
1943 Label L_skip_alignment, L_skip_alignment2, L_aligned_copy; | |
1944 Label L_copy_2_bytes, L_copy_2_bytes_loop, L_exit; | |
1945 | |
1946 const Register from = O0; // source array address | |
1947 const Register to = O1; // destination array address | |
1948 const Register count = O2; // elements count | |
1949 const Register end_from = from; // source array end address | |
1950 const Register end_to = to; // destination array end address | |
1951 | |
1952 const Register byte_count = O3; // bytes count to copy | |
1953 | |
1954 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1955 | |
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1956 if (entry != NULL) { |
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1957 *entry = __ pc(); |
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1958 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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1959 BLOCK_COMMENT("Entry:"); |
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1960 } |
0 | 1961 |
1962 array_overlap_test(nooverlap_target, 1); | |
1963 | |
1964 __ sllx(count, LogBytesPerShort, byte_count); | |
1965 __ add(to, byte_count, end_to); // offset after last copied element | |
1966 | |
1967 // for short arrays, just do single element copy | |
1968 __ cmp(count, 11); // 8 + 3 (22 bytes) | |
1969 __ brx(Assembler::less, false, Assembler::pn, L_copy_2_bytes); | |
1970 __ delayed()->add(from, byte_count, end_from); | |
1971 | |
1972 { | |
1973 // Align end of arrays since they could be not aligned even | |
1974 // when arrays itself are aligned. | |
1975 | |
1976 // copy 1 element if necessary to align 'end_to' on an 4 bytes | |
1977 __ andcc(end_to, 3, G0); | |
1978 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1979 __ delayed()->lduh(end_from, -2, O3); | |
1980 __ dec(end_from, 2); | |
1981 __ dec(end_to, 2); | |
1982 __ dec(count); | |
1983 __ sth(O3, end_to, 0); | |
1984 __ BIND(L_skip_alignment); | |
1985 | |
1986 // copy 2 elements to align 'end_to' on an 8 byte boundary | |
1987 __ andcc(end_to, 7, G0); | |
1988 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment2); | |
1989 __ delayed()->lduh(end_from, -2, O3); | |
1990 __ dec(count, 2); | |
1991 __ lduh(end_from, -4, O4); | |
1992 __ dec(end_from, 4); | |
1993 __ dec(end_to, 4); | |
1994 __ sth(O3, end_to, 2); | |
1995 __ sth(O4, end_to, 0); | |
1996 __ BIND(L_skip_alignment2); | |
1997 } | |
1998 #ifdef _LP64 | |
1999 if (aligned) { | |
2000 // Both arrays are aligned to 8-bytes in 64-bits VM. | |
2001 // The 'count' is decremented in copy_16_bytes_backward_with_shift() | |
2002 // in unaligned case. | |
2003 __ dec(count, 8); | |
2004 } else | |
2005 #endif | |
2006 { | |
2007 // Copy with shift 16 bytes per iteration if arrays do not have | |
2008 // the same alignment mod 8, otherwise jump to the next | |
2009 // code for aligned copy (and substracting 8 from 'count' before jump). | |
2010 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
2011 // Also jump over aligned copy after the copy with shift completed. | |
2012 | |
2013 copy_16_bytes_backward_with_shift(end_from, end_to, count, 8, | |
2014 L_aligned_copy, L_copy_2_bytes); | |
2015 } | |
2016 // copy 4 elements (16 bytes) at a time | |
1365 | 2017 __ align(OptoLoopAlignment); |
0 | 2018 __ BIND(L_aligned_copy); |
2019 __ dec(end_from, 16); | |
2020 __ ldx(end_from, 8, O3); | |
2021 __ ldx(end_from, 0, O4); | |
2022 __ dec(end_to, 16); | |
2023 __ deccc(count, 8); | |
2024 __ stx(O3, end_to, 8); | |
2025 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
2026 __ delayed()->stx(O4, end_to, 0); | |
2027 __ inc(count, 8); | |
2028 | |
2029 // copy 1 element (2 bytes) at a time | |
2030 __ BIND(L_copy_2_bytes); | |
3839 | 2031 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
0 | 2032 __ BIND(L_copy_2_bytes_loop); |
2033 __ dec(end_from, 2); | |
2034 __ dec(end_to, 2); | |
2035 __ lduh(end_from, 0, O4); | |
2036 __ deccc(count); | |
2037 __ brx(Assembler::greater, false, Assembler::pt, L_copy_2_bytes_loop); | |
2038 __ delayed()->sth(O4, end_to, 0); | |
2039 | |
2040 __ BIND(L_exit); | |
2041 // O3, O4 are used as temp registers | |
2042 inc_counter_np(SharedRuntime::_jshort_array_copy_ctr, O3, O4); | |
2043 __ retl(); | |
2044 __ delayed()->mov(G0, O0); // return 0 | |
2045 return start; | |
2046 } | |
2047 | |
2048 // | |
3903 | 2049 // Helper methods for generate_disjoint_int_copy_core() |
2050 // | |
2051 void copy_16_bytes_loop(Register from, Register to, Register count, int count_dec, | |
2052 Label& L_loop, bool use_prefetch, bool use_bis) { | |
2053 | |
2054 __ align(OptoLoopAlignment); | |
2055 __ BIND(L_loop); | |
2056 if (use_prefetch) { | |
2057 if (ArraycopySrcPrefetchDistance > 0) { | |
2058 __ prefetch(from, ArraycopySrcPrefetchDistance, Assembler::severalReads); | |
2059 } | |
2060 if (ArraycopyDstPrefetchDistance > 0) { | |
2061 __ prefetch(to, ArraycopyDstPrefetchDistance, Assembler::severalWritesAndPossiblyReads); | |
2062 } | |
2063 } | |
2064 __ ldx(from, 4, O4); | |
2065 __ ldx(from, 12, G4); | |
2066 __ inc(to, 16); | |
2067 __ inc(from, 16); | |
2068 __ deccc(count, 4); // Can we do next iteration after this one? | |
2069 | |
2070 __ srlx(O4, 32, G3); | |
2071 __ bset(G3, O3); | |
2072 __ sllx(O4, 32, O4); | |
2073 __ srlx(G4, 32, G3); | |
2074 __ bset(G3, O4); | |
2075 if (use_bis) { | |
2076 __ stxa(O3, to, -16); | |
2077 __ stxa(O4, to, -8); | |
2078 } else { | |
2079 __ stx(O3, to, -16); | |
2080 __ stx(O4, to, -8); | |
2081 } | |
2082 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
2083 __ delayed()->sllx(G4, 32, O3); | |
2084 | |
2085 } | |
2086 | |
2087 // | |
0 | 2088 // Generate core code for disjoint int copy (and oop copy on 32-bit). |
2089 // If "aligned" is true, the "from" and "to" addresses are assumed | |
2090 // to be heapword aligned. | |
2091 // | |
2092 // Arguments: | |
2093 // from: O0 | |
2094 // to: O1 | |
2095 // count: O2 treated as signed | |
2096 // | |
2097 void generate_disjoint_int_copy_core(bool aligned) { | |
2098 | |
2099 Label L_skip_alignment, L_aligned_copy; | |
3903 | 2100 Label L_copy_4_bytes, L_copy_4_bytes_loop, L_exit; |
0 | 2101 |
2102 const Register from = O0; // source array address | |
2103 const Register to = O1; // destination array address | |
2104 const Register count = O2; // elements count | |
2105 const Register offset = O5; // offset from start of arrays | |
2106 // O3, O4, G3, G4 are used as temp registers | |
2107 | |
2108 // 'aligned' == true when it is known statically during compilation | |
2109 // of this arraycopy call site that both 'from' and 'to' addresses | |
2110 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
2111 // | |
2112 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
2113 // and 8 bytes - in 64-bits VM. | |
2114 // | |
2115 #ifdef _LP64 | |
2116 if (!aligned) | |
2117 #endif | |
2118 { | |
2119 // The next check could be put under 'ifndef' since the code in | |
2120 // generate_disjoint_long_copy_core() has own checks and set 'offset'. | |
2121 | |
2122 // for short arrays, just do single element copy | |
2123 __ cmp(count, 5); // 4 + 1 (20 bytes) | |
2124 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_4_bytes); | |
2125 __ delayed()->mov(G0, offset); | |
2126 | |
2127 // copy 1 element to align 'to' on an 8 byte boundary | |
2128 __ andcc(to, 7, G0); | |
2129 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
2130 __ delayed()->ld(from, 0, O3); | |
2131 __ inc(from, 4); | |
2132 __ inc(to, 4); | |
2133 __ dec(count); | |
2134 __ st(O3, to, -4); | |
2135 __ BIND(L_skip_alignment); | |
2136 | |
2137 // if arrays have same alignment mod 8, do 4 elements copy | |
2138 __ andcc(from, 7, G0); | |
2139 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
2140 __ delayed()->ld(from, 0, O3); | |
2141 | |
2142 // | |
2143 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
2144 // to form 2 aligned 8-bytes chunks to store. | |
2145 // | |
2146 // copy_16_bytes_forward_with_shift() is not used here since this | |
2147 // code is more optimal. | |
2148 | |
2149 // copy with shift 4 elements (16 bytes) at a time | |
2150 __ dec(count, 4); // The cmp at the beginning guaranty count >= 4 | |
3903 | 2151 __ sllx(O3, 32, O3); |
2152 | |
2153 disjoint_copy_core(from, to, count, 2, 16, copy_16_bytes_loop); | |
0 | 2154 |
2155 __ br(Assembler::always, false, Assembler::pt, L_copy_4_bytes); | |
2156 __ delayed()->inc(count, 4); // restore 'count' | |
2157 | |
2158 __ BIND(L_aligned_copy); | |
3903 | 2159 } // !aligned |
2160 | |
0 | 2161 // copy 4 elements (16 bytes) at a time |
2162 __ and3(count, 1, G4); // Save | |
2163 __ srl(count, 1, count); | |
2164 generate_disjoint_long_copy_core(aligned); | |
2165 __ mov(G4, count); // Restore | |
2166 | |
2167 // copy 1 element at a time | |
2168 __ BIND(L_copy_4_bytes); | |
3839 | 2169 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
0 | 2170 __ BIND(L_copy_4_bytes_loop); |
2171 __ ld(from, offset, O3); | |
2172 __ deccc(count); | |
2173 __ st(O3, to, offset); | |
2174 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_4_bytes_loop); | |
2175 __ delayed()->inc(offset, 4); | |
2176 __ BIND(L_exit); | |
2177 } | |
2178 | |
2179 // | |
2180 // Generate stub for disjoint int copy. If "aligned" is true, the | |
2181 // "from" and "to" addresses are assumed to be heapword aligned. | |
2182 // | |
2183 // Arguments for generated stub: | |
2184 // from: O0 | |
2185 // to: O1 | |
2186 // count: O2 treated as signed | |
2187 // | |
2313
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2188 address generate_disjoint_int_copy(bool aligned, address *entry, const char *name) { |
0 | 2189 __ align(CodeEntryAlignment); |
2190 StubCodeMark mark(this, "StubRoutines", name); | |
2191 address start = __ pc(); | |
2192 | |
2193 const Register count = O2; | |
2194 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
2195 | |
2313
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2196 if (entry != NULL) { |
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2197 *entry = __ pc(); |
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2198 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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2199 BLOCK_COMMENT("Entry:"); |
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2200 } |
0 | 2201 |
2202 generate_disjoint_int_copy_core(aligned); | |
2203 | |
2204 // O3, O4 are used as temp registers | |
2205 inc_counter_np(SharedRuntime::_jint_array_copy_ctr, O3, O4); | |
2206 __ retl(); | |
2207 __ delayed()->mov(G0, O0); // return 0 | |
2208 return start; | |
2209 } | |
2210 | |
2211 // | |
2212 // Generate core code for conjoint int copy (and oop copy on 32-bit). | |
2213 // If "aligned" is true, the "from" and "to" addresses are assumed | |
2214 // to be heapword aligned. | |
2215 // | |
2216 // Arguments: | |
2217 // from: O0 | |
2218 // to: O1 | |
2219 // count: O2 treated as signed | |
2220 // | |
2221 void generate_conjoint_int_copy_core(bool aligned) { | |
2222 // Do reverse copy. | |
2223 | |
2224 Label L_skip_alignment, L_aligned_copy; | |
2225 Label L_copy_16_bytes, L_copy_4_bytes, L_copy_4_bytes_loop, L_exit; | |
2226 | |
2227 const Register from = O0; // source array address | |
2228 const Register to = O1; // destination array address | |
2229 const Register count = O2; // elements count | |
2230 const Register end_from = from; // source array end address | |
2231 const Register end_to = to; // destination array end address | |
2232 // O3, O4, O5, G3 are used as temp registers | |
2233 | |
2234 const Register byte_count = O3; // bytes count to copy | |
2235 | |
2236 __ sllx(count, LogBytesPerInt, byte_count); | |
2237 __ add(to, byte_count, end_to); // offset after last copied element | |
2238 | |
2239 __ cmp(count, 5); // for short arrays, just do single element copy | |
2240 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_4_bytes); | |
2241 __ delayed()->add(from, byte_count, end_from); | |
2242 | |
2243 // copy 1 element to align 'to' on an 8 byte boundary | |
2244 __ andcc(end_to, 7, G0); | |
2245 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
2246 __ delayed()->nop(); | |
2247 __ dec(count); | |
2248 __ dec(end_from, 4); | |
2249 __ dec(end_to, 4); | |
2250 __ ld(end_from, 0, O4); | |
2251 __ st(O4, end_to, 0); | |
2252 __ BIND(L_skip_alignment); | |
2253 | |
2254 // Check if 'end_from' and 'end_to' has the same alignment. | |
2255 __ andcc(end_from, 7, G0); | |
2256 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
2257 __ delayed()->dec(count, 4); // The cmp at the start guaranty cnt >= 4 | |
2258 | |
2259 // copy with shift 4 elements (16 bytes) at a time | |
2260 // | |
2261 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
2262 // to form 2 aligned 8-bytes chunks to store. | |
2263 // | |
2264 __ ldx(end_from, -4, O3); | |
1365 | 2265 __ align(OptoLoopAlignment); |
0 | 2266 __ BIND(L_copy_16_bytes); |
2267 __ ldx(end_from, -12, O4); | |
2268 __ deccc(count, 4); | |
2269 __ ldx(end_from, -20, O5); | |
2270 __ dec(end_to, 16); | |
2271 __ dec(end_from, 16); | |
2272 __ srlx(O3, 32, O3); | |
2273 __ sllx(O4, 32, G3); | |
2274 __ bset(G3, O3); | |
2275 __ stx(O3, end_to, 8); | |
2276 __ srlx(O4, 32, O4); | |
2277 __ sllx(O5, 32, G3); | |
2278 __ bset(O4, G3); | |
2279 __ stx(G3, end_to, 0); | |
2280 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes); | |
2281 __ delayed()->mov(O5, O3); | |
2282 | |
2283 __ br(Assembler::always, false, Assembler::pt, L_copy_4_bytes); | |
2284 __ delayed()->inc(count, 4); | |
2285 | |
2286 // copy 4 elements (16 bytes) at a time | |
1365 | 2287 __ align(OptoLoopAlignment); |
0 | 2288 __ BIND(L_aligned_copy); |
2289 __ dec(end_from, 16); | |
2290 __ ldx(end_from, 8, O3); | |
2291 __ ldx(end_from, 0, O4); | |
2292 __ dec(end_to, 16); | |
2293 __ deccc(count, 4); | |
2294 __ stx(O3, end_to, 8); | |
2295 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
2296 __ delayed()->stx(O4, end_to, 0); | |
2297 __ inc(count, 4); | |
2298 | |
2299 // copy 1 element (4 bytes) at a time | |
2300 __ BIND(L_copy_4_bytes); | |
3839 | 2301 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
0 | 2302 __ BIND(L_copy_4_bytes_loop); |
2303 __ dec(end_from, 4); | |
2304 __ dec(end_to, 4); | |
2305 __ ld(end_from, 0, O4); | |
2306 __ deccc(count); | |
2307 __ brx(Assembler::greater, false, Assembler::pt, L_copy_4_bytes_loop); | |
2308 __ delayed()->st(O4, end_to, 0); | |
2309 __ BIND(L_exit); | |
2310 } | |
2311 | |
2312 // | |
2313 // Generate stub for conjoint int copy. If "aligned" is true, the | |
2314 // "from" and "to" addresses are assumed to be heapword aligned. | |
2315 // | |
2316 // Arguments for generated stub: | |
2317 // from: O0 | |
2318 // to: O1 | |
2319 // count: O2 treated as signed | |
2320 // | |
2313
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2321 address generate_conjoint_int_copy(bool aligned, address nooverlap_target, |
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2322 address *entry, const char *name) { |
0 | 2323 __ align(CodeEntryAlignment); |
2324 StubCodeMark mark(this, "StubRoutines", name); | |
2325 address start = __ pc(); | |
2326 | |
2327 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
2328 | |
2313
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2329 if (entry != NULL) { |
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2330 *entry = __ pc(); |
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2331 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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2332 BLOCK_COMMENT("Entry:"); |
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2333 } |
0 | 2334 |
2335 array_overlap_test(nooverlap_target, 2); | |
2336 | |
2337 generate_conjoint_int_copy_core(aligned); | |
2338 | |
2339 // O3, O4 are used as temp registers | |
2340 inc_counter_np(SharedRuntime::_jint_array_copy_ctr, O3, O4); | |
2341 __ retl(); | |
2342 __ delayed()->mov(G0, O0); // return 0 | |
2343 return start; | |
2344 } | |
2345 | |
2346 // | |
3903 | 2347 // Helper methods for generate_disjoint_long_copy_core() |
2348 // | |
2349 void copy_64_bytes_loop(Register from, Register to, Register count, int count_dec, | |
2350 Label& L_loop, bool use_prefetch, bool use_bis) { | |
2351 __ align(OptoLoopAlignment); | |
2352 __ BIND(L_loop); | |
2353 for (int off = 0; off < 64; off += 16) { | |
2354 if (use_prefetch && (off & 31) == 0) { | |
2355 if (ArraycopySrcPrefetchDistance > 0) { | |
3961
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2356 __ prefetch(from, ArraycopySrcPrefetchDistance+off, Assembler::severalReads); |
3903 | 2357 } |
2358 if (ArraycopyDstPrefetchDistance > 0) { | |
3961
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2359 __ prefetch(to, ArraycopyDstPrefetchDistance+off, Assembler::severalWritesAndPossiblyReads); |
3903 | 2360 } |
2361 } | |
2362 __ ldx(from, off+0, O4); | |
2363 __ ldx(from, off+8, O5); | |
2364 if (use_bis) { | |
2365 __ stxa(O4, to, off+0); | |
2366 __ stxa(O5, to, off+8); | |
2367 } else { | |
2368 __ stx(O4, to, off+0); | |
2369 __ stx(O5, to, off+8); | |
2370 } | |
2371 } | |
2372 __ deccc(count, 8); | |
2373 __ inc(from, 64); | |
2374 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
2375 __ delayed()->inc(to, 64); | |
2376 } | |
2377 | |
2378 // | |
0 | 2379 // Generate core code for disjoint long copy (and oop copy on 64-bit). |
2380 // "aligned" is ignored, because we must make the stronger | |
2381 // assumption that both addresses are always 64-bit aligned. | |
2382 // | |
2383 // Arguments: | |
2384 // from: O0 | |
2385 // to: O1 | |
2386 // count: O2 treated as signed | |
2387 // | |
1364
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2388 // count -= 2; |
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2389 // if ( count >= 0 ) { // >= 2 elements |
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2390 // if ( count > 6) { // >= 8 elements |
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2391 // count -= 6; // original count - 8 |
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2392 // do { |
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2393 // copy_8_elements; |
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2394 // count -= 8; |
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2395 // } while ( count >= 0 ); |
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2396 // count += 6; |
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2397 // } |
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2398 // if ( count >= 0 ) { // >= 2 elements |
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2399 // do { |
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2400 // copy_2_elements; |
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2401 // } while ( (count=count-2) >= 0 ); |
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2402 // } |
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2403 // } |
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2404 // count += 2; |
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2405 // if ( count != 0 ) { // 1 element left |
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2406 // copy_1_element; |
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2407 // } |
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2408 // |
0 | 2409 void generate_disjoint_long_copy_core(bool aligned) { |
2410 Label L_copy_8_bytes, L_copy_16_bytes, L_exit; | |
2411 const Register from = O0; // source array address | |
2412 const Register to = O1; // destination array address | |
2413 const Register count = O2; // elements count | |
2414 const Register offset0 = O4; // element offset | |
2415 const Register offset8 = O5; // next element offset | |
2416 | |
3903 | 2417 __ deccc(count, 2); |
2418 __ mov(G0, offset0); // offset from start of arrays (0) | |
2419 __ brx(Assembler::negative, false, Assembler::pn, L_copy_8_bytes ); | |
2420 __ delayed()->add(offset0, 8, offset8); | |
1364
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2421 |
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2422 // Copy by 64 bytes chunks |
3903 | 2423 |
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2424 const Register from64 = O3; // source address |
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2425 const Register to64 = G3; // destination address |
3903 | 2426 __ subcc(count, 6, O3); |
2427 __ brx(Assembler::negative, false, Assembler::pt, L_copy_16_bytes ); | |
2428 __ delayed()->mov(to, to64); | |
2429 // Now we can use O4(offset0), O5(offset8) as temps | |
2430 __ mov(O3, count); | |
2431 // count >= 0 (original count - 8) | |
2432 __ mov(from, from64); | |
2433 | |
2434 disjoint_copy_core(from64, to64, count, 3, 64, copy_64_bytes_loop); | |
1364
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2435 |
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2436 // Restore O4(offset0), O5(offset8) |
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2437 __ sub(from64, from, offset0); |
3903 | 2438 __ inccc(count, 6); // restore count |
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2439 __ brx(Assembler::negative, false, Assembler::pn, L_copy_8_bytes ); |
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2440 __ delayed()->add(offset0, 8, offset8); |
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2441 |
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2442 // Copy by 16 bytes chunks |
1365 | 2443 __ align(OptoLoopAlignment); |
0 | 2444 __ BIND(L_copy_16_bytes); |
2445 __ ldx(from, offset0, O3); | |
2446 __ ldx(from, offset8, G3); | |
2447 __ deccc(count, 2); | |
2448 __ stx(O3, to, offset0); | |
2449 __ inc(offset0, 16); | |
2450 __ stx(G3, to, offset8); | |
2451 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes); | |
2452 __ delayed()->inc(offset8, 16); | |
2453 | |
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2454 // Copy last 8 bytes |
0 | 2455 __ BIND(L_copy_8_bytes); |
2456 __ inccc(count, 2); | |
2457 __ brx(Assembler::zero, true, Assembler::pn, L_exit ); | |
2458 __ delayed()->mov(offset0, offset8); // Set O5 used by other stubs | |
2459 __ ldx(from, offset0, O3); | |
2460 __ stx(O3, to, offset0); | |
2461 __ BIND(L_exit); | |
2462 } | |
2463 | |
2464 // | |
2465 // Generate stub for disjoint long copy. | |
2466 // "aligned" is ignored, because we must make the stronger | |
2467 // assumption that both addresses are always 64-bit aligned. | |
2468 // | |
2469 // Arguments for generated stub: | |
2470 // from: O0 | |
2471 // to: O1 | |
2472 // count: O2 treated as signed | |
2473 // | |
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2474 address generate_disjoint_long_copy(bool aligned, address *entry, const char *name) { |
0 | 2475 __ align(CodeEntryAlignment); |
2476 StubCodeMark mark(this, "StubRoutines", name); | |
2477 address start = __ pc(); | |
2478 | |
2479 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
2480 | |
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2481 if (entry != NULL) { |
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2482 *entry = __ pc(); |
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2483 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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2484 BLOCK_COMMENT("Entry:"); |
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2485 } |
0 | 2486 |
2487 generate_disjoint_long_copy_core(aligned); | |
2488 | |
2489 // O3, O4 are used as temp registers | |
2490 inc_counter_np(SharedRuntime::_jlong_array_copy_ctr, O3, O4); | |
2491 __ retl(); | |
2492 __ delayed()->mov(G0, O0); // return 0 | |
2493 return start; | |
2494 } | |
2495 | |
2496 // | |
2497 // Generate core code for conjoint long copy (and oop copy on 64-bit). | |
2498 // "aligned" is ignored, because we must make the stronger | |
2499 // assumption that both addresses are always 64-bit aligned. | |
2500 // | |
2501 // Arguments: | |
2502 // from: O0 | |
2503 // to: O1 | |
2504 // count: O2 treated as signed | |
2505 // | |
2506 void generate_conjoint_long_copy_core(bool aligned) { | |
2507 // Do reverse copy. | |
2508 Label L_copy_8_bytes, L_copy_16_bytes, L_exit; | |
2509 const Register from = O0; // source array address | |
2510 const Register to = O1; // destination array address | |
2511 const Register count = O2; // elements count | |
2512 const Register offset8 = O4; // element offset | |
2513 const Register offset0 = O5; // previous element offset | |
2514 | |
2515 __ subcc(count, 1, count); | |
2516 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_8_bytes ); | |
2517 __ delayed()->sllx(count, LogBytesPerLong, offset8); | |
2518 __ sub(offset8, 8, offset0); | |
1365 | 2519 __ align(OptoLoopAlignment); |
0 | 2520 __ BIND(L_copy_16_bytes); |
2521 __ ldx(from, offset8, O2); | |
2522 __ ldx(from, offset0, O3); | |
2523 __ stx(O2, to, offset8); | |
2524 __ deccc(offset8, 16); // use offset8 as counter | |
2525 __ stx(O3, to, offset0); | |
2526 __ brx(Assembler::greater, false, Assembler::pt, L_copy_16_bytes); | |
2527 __ delayed()->dec(offset0, 16); | |
2528 | |
2529 __ BIND(L_copy_8_bytes); | |
2530 __ brx(Assembler::negative, false, Assembler::pn, L_exit ); | |
2531 __ delayed()->nop(); | |
2532 __ ldx(from, 0, O3); | |
2533 __ stx(O3, to, 0); | |
2534 __ BIND(L_exit); | |
2535 } | |
2536 | |
2537 // Generate stub for conjoint long copy. | |
2538 // "aligned" is ignored, because we must make the stronger | |
2539 // assumption that both addresses are always 64-bit aligned. | |
2540 // | |
2541 // Arguments for generated stub: | |
2542 // from: O0 | |
2543 // to: O1 | |
2544 // count: O2 treated as signed | |
2545 // | |
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2546 address generate_conjoint_long_copy(bool aligned, address nooverlap_target, |
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2547 address *entry, const char *name) { |
0 | 2548 __ align(CodeEntryAlignment); |
2549 StubCodeMark mark(this, "StubRoutines", name); | |
2550 address start = __ pc(); | |
2551 | |
2324 | 2552 assert(aligned, "Should always be aligned"); |
0 | 2553 |
2554 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
2555 | |
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2556 if (entry != NULL) { |
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2557 *entry = __ pc(); |
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2558 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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2559 BLOCK_COMMENT("Entry:"); |
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2560 } |
0 | 2561 |
2562 array_overlap_test(nooverlap_target, 3); | |
2563 | |
2564 generate_conjoint_long_copy_core(aligned); | |
2565 | |
2566 // O3, O4 are used as temp registers | |
2567 inc_counter_np(SharedRuntime::_jlong_array_copy_ctr, O3, O4); | |
2568 __ retl(); | |
2569 __ delayed()->mov(G0, O0); // return 0 | |
2570 return start; | |
2571 } | |
2572 | |
2573 // Generate stub for disjoint oop copy. If "aligned" is true, the | |
2574 // "from" and "to" addresses are assumed to be heapword aligned. | |
2575 // | |
2576 // Arguments for generated stub: | |
2577 // from: O0 | |
2578 // to: O1 | |
2579 // count: O2 treated as signed | |
2580 // | |
2324 | 2581 address generate_disjoint_oop_copy(bool aligned, address *entry, const char *name, |
2582 bool dest_uninitialized = false) { | |
0 | 2583 |
2584 const Register from = O0; // source array address | |
2585 const Register to = O1; // destination array address | |
2586 const Register count = O2; // elements count | |
2587 | |
2588 __ align(CodeEntryAlignment); | |
2589 StubCodeMark mark(this, "StubRoutines", name); | |
2590 address start = __ pc(); | |
2591 | |
2592 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
2593 | |
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2594 if (entry != NULL) { |
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2595 *entry = __ pc(); |
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2596 // caller can pass a 64-bit byte count here |
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2597 BLOCK_COMMENT("Entry:"); |
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2598 } |
0 | 2599 |
2600 // save arguments for barrier generation | |
2601 __ mov(to, G1); | |
2602 __ mov(count, G5); | |
2324 | 2603 gen_write_ref_array_pre_barrier(G1, G5, dest_uninitialized); |
0 | 2604 #ifdef _LP64 |
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2605 assert_clean_int(count, O3); // Make sure 'count' is clean int. |
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2606 if (UseCompressedOops) { |
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2607 generate_disjoint_int_copy_core(aligned); |
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2608 } else { |
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2609 generate_disjoint_long_copy_core(aligned); |
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2610 } |
0 | 2611 #else |
2612 generate_disjoint_int_copy_core(aligned); | |
2613 #endif | |
2614 // O0 is used as temp register | |
2615 gen_write_ref_array_post_barrier(G1, G5, O0); | |
2616 | |
2617 // O3, O4 are used as temp registers | |
2618 inc_counter_np(SharedRuntime::_oop_array_copy_ctr, O3, O4); | |
2619 __ retl(); | |
2620 __ delayed()->mov(G0, O0); // return 0 | |
2621 return start; | |
2622 } | |
2623 | |
2624 // Generate stub for conjoint oop copy. If "aligned" is true, the | |
2625 // "from" and "to" addresses are assumed to be heapword aligned. | |
2626 // | |
2627 // Arguments for generated stub: | |
2628 // from: O0 | |
2629 // to: O1 | |
2630 // count: O2 treated as signed | |
2631 // | |
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2632 address generate_conjoint_oop_copy(bool aligned, address nooverlap_target, |
2324 | 2633 address *entry, const char *name, |
2634 bool dest_uninitialized = false) { | |
0 | 2635 |
2636 const Register from = O0; // source array address | |
2637 const Register to = O1; // destination array address | |
2638 const Register count = O2; // elements count | |
2639 | |
2640 __ align(CodeEntryAlignment); | |
2641 StubCodeMark mark(this, "StubRoutines", name); | |
2642 address start = __ pc(); | |
2643 | |
2644 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
2645 | |
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2646 if (entry != NULL) { |
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2647 *entry = __ pc(); |
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2648 // caller can pass a 64-bit byte count here |
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2649 BLOCK_COMMENT("Entry:"); |
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2650 } |
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2651 |
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2652 array_overlap_test(nooverlap_target, LogBytesPerHeapOop); |
0 | 2653 |
2654 // save arguments for barrier generation | |
2655 __ mov(to, G1); | |
2656 __ mov(count, G5); | |
2324 | 2657 gen_write_ref_array_pre_barrier(G1, G5, dest_uninitialized); |
0 | 2658 |
2659 #ifdef _LP64 | |
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2660 if (UseCompressedOops) { |
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2661 generate_conjoint_int_copy_core(aligned); |
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2662 } else { |
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2663 generate_conjoint_long_copy_core(aligned); |
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2664 } |
0 | 2665 #else |
2666 generate_conjoint_int_copy_core(aligned); | |
2667 #endif | |
2668 | |
2669 // O0 is used as temp register | |
2670 gen_write_ref_array_post_barrier(G1, G5, O0); | |
2671 | |
2672 // O3, O4 are used as temp registers | |
2673 inc_counter_np(SharedRuntime::_oop_array_copy_ctr, O3, O4); | |
2674 __ retl(); | |
2675 __ delayed()->mov(G0, O0); // return 0 | |
2676 return start; | |
2677 } | |
2678 | |
2679 | |
2680 // Helper for generating a dynamic type check. | |
2681 // Smashes only the given temp registers. | |
2682 void generate_type_check(Register sub_klass, | |
2683 Register super_check_offset, | |
2684 Register super_klass, | |
2685 Register temp, | |
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2686 Label& L_success) { |
0 | 2687 assert_different_registers(sub_klass, super_check_offset, super_klass, temp); |
2688 | |
2689 BLOCK_COMMENT("type_check:"); | |
2690 | |
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2691 Label L_miss, L_pop_to_miss; |
0 | 2692 |
2693 assert_clean_int(super_check_offset, temp); | |
2694 | |
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2695 __ check_klass_subtype_fast_path(sub_klass, super_klass, temp, noreg, |
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2696 &L_success, &L_miss, NULL, |
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2697 super_check_offset); |
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2698 |
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2699 BLOCK_COMMENT("type_check_slow_path:"); |
0 | 2700 __ save_frame(0); |
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2701 __ check_klass_subtype_slow_path(sub_klass->after_save(), |
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2702 super_klass->after_save(), |
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2703 L0, L1, L2, L4, |
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2704 NULL, &L_pop_to_miss); |
3839 | 2705 __ ba(L_success); |
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2706 __ delayed()->restore(); |
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2707 |
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2708 __ bind(L_pop_to_miss); |
0 | 2709 __ restore(); |
2710 | |
2711 // Fall through on failure! | |
2712 __ BIND(L_miss); | |
2713 } | |
2714 | |
2715 | |
2716 // Generate stub for checked oop copy. | |
2717 // | |
2718 // Arguments for generated stub: | |
2719 // from: O0 | |
2720 // to: O1 | |
2721 // count: O2 treated as signed | |
2722 // ckoff: O3 (super_check_offset) | |
2723 // ckval: O4 (super_klass) | |
2724 // ret: O0 zero for success; (-1^K) where K is partial transfer count | |
2725 // | |
2324 | 2726 address generate_checkcast_copy(const char *name, address *entry, bool dest_uninitialized = false) { |
0 | 2727 |
2728 const Register O0_from = O0; // source array address | |
2729 const Register O1_to = O1; // destination array address | |
2730 const Register O2_count = O2; // elements count | |
2731 const Register O3_ckoff = O3; // super_check_offset | |
2732 const Register O4_ckval = O4; // super_klass | |
2733 | |
2734 const Register O5_offset = O5; // loop var, with stride wordSize | |
2735 const Register G1_remain = G1; // loop var, with stride -1 | |
2736 const Register G3_oop = G3; // actual oop copied | |
2737 const Register G4_klass = G4; // oop._klass | |
2738 const Register G5_super = G5; // oop._klass._primary_supers[ckval] | |
2739 | |
2740 __ align(CodeEntryAlignment); | |
2741 StubCodeMark mark(this, "StubRoutines", name); | |
2742 address start = __ pc(); | |
2743 | |
2744 #ifdef ASSERT | |
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2745 // We sometimes save a frame (see generate_type_check below). |
0 | 2746 // If this will cause trouble, let's fail now instead of later. |
2747 __ save_frame(0); | |
2748 __ restore(); | |
2749 #endif | |
2750 | |
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2751 assert_clean_int(O2_count, G1); // Make sure 'count' is clean int. |
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2752 |
0 | 2753 #ifdef ASSERT |
2754 // caller guarantees that the arrays really are different | |
2755 // otherwise, we would have to make conjoint checks | |
2756 { Label L; | |
2757 __ mov(O3, G1); // spill: overlap test smashes O3 | |
2758 __ mov(O4, G4); // spill: overlap test smashes O4 | |
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2759 array_overlap_test(L, LogBytesPerHeapOop); |
0 | 2760 __ stop("checkcast_copy within a single array"); |
2761 __ bind(L); | |
2762 __ mov(G1, O3); | |
2763 __ mov(G4, O4); | |
2764 } | |
2765 #endif //ASSERT | |
2766 | |
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2767 if (entry != NULL) { |
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2768 *entry = __ pc(); |
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2769 // caller can pass a 64-bit byte count here (from generic stub) |
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2770 BLOCK_COMMENT("Entry:"); |
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2771 } |
2324 | 2772 gen_write_ref_array_pre_barrier(O1_to, O2_count, dest_uninitialized); |
0 | 2773 |
2774 Label load_element, store_element, do_card_marks, fail, done; | |
2775 __ addcc(O2_count, 0, G1_remain); // initialize loop index, and test it | |
2776 __ brx(Assembler::notZero, false, Assembler::pt, load_element); | |
2777 __ delayed()->mov(G0, O5_offset); // offset from start of arrays | |
2778 | |
2779 // Empty array: Nothing to do. | |
2780 inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr, O3, O4); | |
2781 __ retl(); | |
2782 __ delayed()->set(0, O0); // return 0 on (trivial) success | |
2783 | |
2784 // ======== begin loop ======== | |
2785 // (Loop is rotated; its entry is load_element.) | |
2786 // Loop variables: | |
2787 // (O5 = 0; ; O5 += wordSize) --- offset from src, dest arrays | |
2788 // (O2 = len; O2 != 0; O2--) --- number of oops *remaining* | |
2789 // G3, G4, G5 --- current oop, oop.klass, oop.klass.super | |
1365 | 2790 __ align(OptoLoopAlignment); |
0 | 2791 |
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2792 __ BIND(store_element); |
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2793 __ deccc(G1_remain); // decrement the count |
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2794 __ store_heap_oop(G3_oop, O1_to, O5_offset); // store the oop |
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2795 __ inc(O5_offset, heapOopSize); // step to next offset |
0 | 2796 __ brx(Assembler::zero, true, Assembler::pt, do_card_marks); |
2797 __ delayed()->set(0, O0); // return -1 on success | |
2798 | |
2799 // ======== loop entry is here ======== | |
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2800 __ BIND(load_element); |
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2801 __ load_heap_oop(O0_from, O5_offset, G3_oop); // load the oop |
3839 | 2802 __ br_null_short(G3_oop, Assembler::pt, store_element); |
0 | 2803 |
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2804 __ load_klass(G3_oop, G4_klass); // query the object klass |
0 | 2805 |
2806 generate_type_check(G4_klass, O3_ckoff, O4_ckval, G5_super, | |
2807 // branch to this on success: | |
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2808 store_element); |
0 | 2809 // ======== end loop ======== |
2810 | |
2811 // It was a real error; we must depend on the caller to finish the job. | |
2812 // Register G1 has number of *remaining* oops, O2 number of *total* oops. | |
2813 // Emit GC store barriers for the oops we have copied (O2 minus G1), | |
2814 // and report their number to the caller. | |
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2815 __ BIND(fail); |
0 | 2816 __ subcc(O2_count, G1_remain, O2_count); |
2817 __ brx(Assembler::zero, false, Assembler::pt, done); | |
2818 __ delayed()->not1(O2_count, O0); // report (-1^K) to caller | |
2819 | |
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2820 __ BIND(do_card_marks); |
0 | 2821 gen_write_ref_array_post_barrier(O1_to, O2_count, O3); // store check on O1[0..O2] |
2822 | |
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2823 __ BIND(done); |
0 | 2824 inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr, O3, O4); |
2825 __ retl(); | |
2826 __ delayed()->nop(); // return value in 00 | |
2827 | |
2828 return start; | |
2829 } | |
2830 | |
2831 | |
2832 // Generate 'unsafe' array copy stub | |
2833 // Though just as safe as the other stubs, it takes an unscaled | |
2834 // size_t argument instead of an element count. | |
2835 // | |
2836 // Arguments for generated stub: | |
2837 // from: O0 | |
2838 // to: O1 | |
2839 // count: O2 byte count, treated as ssize_t, can be zero | |
2840 // | |
2841 // Examines the alignment of the operands and dispatches | |
2842 // to a long, int, short, or byte copy loop. | |
2843 // | |
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2844 address generate_unsafe_copy(const char* name, |
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2845 address byte_copy_entry, |
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2846 address short_copy_entry, |
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2847 address int_copy_entry, |
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2848 address long_copy_entry) { |
0 | 2849 |
2850 const Register O0_from = O0; // source array address | |
2851 const Register O1_to = O1; // destination array address | |
2852 const Register O2_count = O2; // elements count | |
2853 | |
2854 const Register G1_bits = G1; // test copy of low bits | |
2855 | |
2856 __ align(CodeEntryAlignment); | |
2857 StubCodeMark mark(this, "StubRoutines", name); | |
2858 address start = __ pc(); | |
2859 | |
2860 // bump this on entry, not on exit: | |
2861 inc_counter_np(SharedRuntime::_unsafe_array_copy_ctr, G1, G3); | |
2862 | |
2863 __ or3(O0_from, O1_to, G1_bits); | |
2864 __ or3(O2_count, G1_bits, G1_bits); | |
2865 | |
2866 __ btst(BytesPerLong-1, G1_bits); | |
2867 __ br(Assembler::zero, true, Assembler::pt, | |
2868 long_copy_entry, relocInfo::runtime_call_type); | |
2869 // scale the count on the way out: | |
2870 __ delayed()->srax(O2_count, LogBytesPerLong, O2_count); | |
2871 | |
2872 __ btst(BytesPerInt-1, G1_bits); | |
2873 __ br(Assembler::zero, true, Assembler::pt, | |
2874 int_copy_entry, relocInfo::runtime_call_type); | |
2875 // scale the count on the way out: | |
2876 __ delayed()->srax(O2_count, LogBytesPerInt, O2_count); | |
2877 | |
2878 __ btst(BytesPerShort-1, G1_bits); | |
2879 __ br(Assembler::zero, true, Assembler::pt, | |
2880 short_copy_entry, relocInfo::runtime_call_type); | |
2881 // scale the count on the way out: | |
2882 __ delayed()->srax(O2_count, LogBytesPerShort, O2_count); | |
2883 | |
2884 __ br(Assembler::always, false, Assembler::pt, | |
2885 byte_copy_entry, relocInfo::runtime_call_type); | |
2886 __ delayed()->nop(); | |
2887 | |
2888 return start; | |
2889 } | |
2890 | |
2891 | |
2892 // Perform range checks on the proposed arraycopy. | |
2893 // Kills the two temps, but nothing else. | |
2894 // Also, clean the sign bits of src_pos and dst_pos. | |
2895 void arraycopy_range_checks(Register src, // source array oop (O0) | |
2896 Register src_pos, // source position (O1) | |
2897 Register dst, // destination array oo (O2) | |
2898 Register dst_pos, // destination position (O3) | |
2899 Register length, // length of copy (O4) | |
2900 Register temp1, Register temp2, | |
2901 Label& L_failed) { | |
2902 BLOCK_COMMENT("arraycopy_range_checks:"); | |
2903 | |
2904 // if (src_pos + length > arrayOop(src)->length() ) FAIL; | |
2905 | |
2906 const Register array_length = temp1; // scratch | |
2907 const Register end_pos = temp2; // scratch | |
2908 | |
2909 // Note: This next instruction may be in the delay slot of a branch: | |
2910 __ add(length, src_pos, end_pos); // src_pos + length | |
2911 __ lduw(src, arrayOopDesc::length_offset_in_bytes(), array_length); | |
2912 __ cmp(end_pos, array_length); | |
2913 __ br(Assembler::greater, false, Assembler::pn, L_failed); | |
2914 | |
2915 // if (dst_pos + length > arrayOop(dst)->length() ) FAIL; | |
2916 __ delayed()->add(length, dst_pos, end_pos); // dst_pos + length | |
2917 __ lduw(dst, arrayOopDesc::length_offset_in_bytes(), array_length); | |
2918 __ cmp(end_pos, array_length); | |
2919 __ br(Assembler::greater, false, Assembler::pn, L_failed); | |
2920 | |
2921 // Have to clean up high 32-bits of 'src_pos' and 'dst_pos'. | |
2922 // Move with sign extension can be used since they are positive. | |
2923 __ delayed()->signx(src_pos, src_pos); | |
2924 __ signx(dst_pos, dst_pos); | |
2925 | |
2926 BLOCK_COMMENT("arraycopy_range_checks done"); | |
2927 } | |
2928 | |
2929 | |
2930 // | |
2931 // Generate generic array copy stubs | |
2932 // | |
2933 // Input: | |
2934 // O0 - src oop | |
2935 // O1 - src_pos | |
2936 // O2 - dst oop | |
2937 // O3 - dst_pos | |
2938 // O4 - element count | |
2939 // | |
2940 // Output: | |
2941 // O0 == 0 - success | |
2942 // O0 == -1 - need to call System.arraycopy | |
2943 // | |
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2944 address generate_generic_copy(const char *name, |
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2945 address entry_jbyte_arraycopy, |
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2946 address entry_jshort_arraycopy, |
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2947 address entry_jint_arraycopy, |
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2948 address entry_oop_arraycopy, |
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2949 address entry_jlong_arraycopy, |
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2950 address entry_checkcast_arraycopy) { |
0 | 2951 Label L_failed, L_objArray; |
2952 | |
2953 // Input registers | |
2954 const Register src = O0; // source array oop | |
2955 const Register src_pos = O1; // source position | |
2956 const Register dst = O2; // destination array oop | |
2957 const Register dst_pos = O3; // destination position | |
2958 const Register length = O4; // elements count | |
2959 | |
2960 // registers used as temp | |
2961 const Register G3_src_klass = G3; // source array klass | |
2962 const Register G4_dst_klass = G4; // destination array klass | |
2963 const Register G5_lh = G5; // layout handler | |
2964 const Register O5_temp = O5; | |
2965 | |
2966 __ align(CodeEntryAlignment); | |
2967 StubCodeMark mark(this, "StubRoutines", name); | |
2968 address start = __ pc(); | |
2969 | |
2970 // bump this on entry, not on exit: | |
2971 inc_counter_np(SharedRuntime::_generic_array_copy_ctr, G1, G3); | |
2972 | |
2973 // In principle, the int arguments could be dirty. | |
2974 //assert_clean_int(src_pos, G1); | |
2975 //assert_clean_int(dst_pos, G1); | |
2976 //assert_clean_int(length, G1); | |
2977 | |
2978 //----------------------------------------------------------------------- | |
2979 // Assembler stubs will be used for this call to arraycopy | |
2980 // if the following conditions are met: | |
2981 // | |
2982 // (1) src and dst must not be null. | |
2983 // (2) src_pos must not be negative. | |
2984 // (3) dst_pos must not be negative. | |
2985 // (4) length must not be negative. | |
2986 // (5) src klass and dst klass should be the same and not NULL. | |
2987 // (6) src and dst should be arrays. | |
2988 // (7) src_pos + length must not exceed length of src. | |
2989 // (8) dst_pos + length must not exceed length of dst. | |
2990 BLOCK_COMMENT("arraycopy initial argument checks"); | |
2991 | |
2992 // if (src == NULL) return -1; | |
2993 __ br_null(src, false, Assembler::pn, L_failed); | |
2994 | |
2995 // if (src_pos < 0) return -1; | |
2996 __ delayed()->tst(src_pos); | |
2997 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
2998 __ delayed()->nop(); | |
2999 | |
3000 // if (dst == NULL) return -1; | |
3001 __ br_null(dst, false, Assembler::pn, L_failed); | |
3002 | |
3003 // if (dst_pos < 0) return -1; | |
3004 __ delayed()->tst(dst_pos); | |
3005 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
3006 | |
3007 // if (length < 0) return -1; | |
3008 __ delayed()->tst(length); | |
3009 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
3010 | |
3011 BLOCK_COMMENT("arraycopy argument klass checks"); | |
3012 // get src->klass() | |
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3013 if (UseCompressedKlassPointers) { |
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3014 __ delayed()->nop(); // ??? not good |
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3015 __ load_klass(src, G3_src_klass); |
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3016 } else { |
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3017 __ delayed()->ld_ptr(src, oopDesc::klass_offset_in_bytes(), G3_src_klass); |
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3018 } |
0 | 3019 |
3020 #ifdef ASSERT | |
3021 // assert(src->klass() != NULL); | |
3022 BLOCK_COMMENT("assert klasses not null"); | |
3023 { Label L_a, L_b; | |
3839 | 3024 __ br_notnull_short(G3_src_klass, Assembler::pt, L_b); // it is broken if klass is NULL |
0 | 3025 __ bind(L_a); |
3026 __ stop("broken null klass"); | |
3027 __ bind(L_b); | |
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3028 __ load_klass(dst, G4_dst_klass); |
0 | 3029 __ br_null(G4_dst_klass, false, Assembler::pn, L_a); // this would be broken also |
3030 __ delayed()->mov(G0, G4_dst_klass); // scribble the temp | |
3031 BLOCK_COMMENT("assert done"); | |
3032 } | |
3033 #endif | |
3034 | |
3035 // Load layout helper | |
3036 // | |
3037 // |array_tag| | header_size | element_type | |log2_element_size| | |
3038 // 32 30 24 16 8 2 0 | |
3039 // | |
3040 // array_tag: typeArray = 0x3, objArray = 0x2, non-array = 0x0 | |
3041 // | |
3042 | |
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3043 int lh_offset = in_bytes(Klass::layout_helper_offset()); |
0 | 3044 |
3045 // Load 32-bits signed value. Use br() instruction with it to check icc. | |
3046 __ lduw(G3_src_klass, lh_offset, G5_lh); | |
3047 | |
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3048 if (UseCompressedKlassPointers) { |
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3049 __ load_klass(dst, G4_dst_klass); |
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3050 } |
0 | 3051 // Handle objArrays completely differently... |
3052 juint objArray_lh = Klass::array_layout_helper(T_OBJECT); | |
3053 __ set(objArray_lh, O5_temp); | |
3054 __ cmp(G5_lh, O5_temp); | |
3055 __ br(Assembler::equal, false, Assembler::pt, L_objArray); | |
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3056 if (UseCompressedKlassPointers) { |
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3057 __ delayed()->nop(); |
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3058 } else { |
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3059 __ delayed()->ld_ptr(dst, oopDesc::klass_offset_in_bytes(), G4_dst_klass); |
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3060 } |
0 | 3061 |
3062 // if (src->klass() != dst->klass()) return -1; | |
3839 | 3063 __ cmp_and_brx_short(G3_src_klass, G4_dst_klass, Assembler::notEqual, Assembler::pn, L_failed); |
0 | 3064 |
3065 // if (!src->is_Array()) return -1; | |
3066 __ cmp(G5_lh, Klass::_lh_neutral_value); // < 0 | |
3067 __ br(Assembler::greaterEqual, false, Assembler::pn, L_failed); | |
3068 | |
3069 // At this point, it is known to be a typeArray (array_tag 0x3). | |
3070 #ifdef ASSERT | |
3071 __ delayed()->nop(); | |
3072 { Label L; | |
3073 jint lh_prim_tag_in_place = (Klass::_lh_array_tag_type_value << Klass::_lh_array_tag_shift); | |
3074 __ set(lh_prim_tag_in_place, O5_temp); | |
3075 __ cmp(G5_lh, O5_temp); | |
3076 __ br(Assembler::greaterEqual, false, Assembler::pt, L); | |
3077 __ delayed()->nop(); | |
3078 __ stop("must be a primitive array"); | |
3079 __ bind(L); | |
3080 } | |
3081 #else | |
3082 __ delayed(); // match next insn to prev branch | |
3083 #endif | |
3084 | |
3085 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
3086 O5_temp, G4_dst_klass, L_failed); | |
3087 | |
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3088 // TypeArrayKlass |
0 | 3089 // |
3090 // src_addr = (src + array_header_in_bytes()) + (src_pos << log2elemsize); | |
3091 // dst_addr = (dst + array_header_in_bytes()) + (dst_pos << log2elemsize); | |
3092 // | |
3093 | |
3094 const Register G4_offset = G4_dst_klass; // array offset | |
3095 const Register G3_elsize = G3_src_klass; // log2 element size | |
3096 | |
3097 __ srl(G5_lh, Klass::_lh_header_size_shift, G4_offset); | |
3098 __ and3(G4_offset, Klass::_lh_header_size_mask, G4_offset); // array_offset | |
3099 __ add(src, G4_offset, src); // src array offset | |
3100 __ add(dst, G4_offset, dst); // dst array offset | |
3101 __ and3(G5_lh, Klass::_lh_log2_element_size_mask, G3_elsize); // log2 element size | |
3102 | |
3103 // next registers should be set before the jump to corresponding stub | |
3104 const Register from = O0; // source array address | |
3105 const Register to = O1; // destination array address | |
3106 const Register count = O2; // elements count | |
3107 | |
3108 // 'from', 'to', 'count' registers should be set in this order | |
3109 // since they are the same as 'src', 'src_pos', 'dst'. | |
3110 | |
3111 BLOCK_COMMENT("scale indexes to element size"); | |
3112 __ sll_ptr(src_pos, G3_elsize, src_pos); | |
3113 __ sll_ptr(dst_pos, G3_elsize, dst_pos); | |
3114 __ add(src, src_pos, from); // src_addr | |
3115 __ add(dst, dst_pos, to); // dst_addr | |
3116 | |
3117 BLOCK_COMMENT("choose copy loop based on element size"); | |
3118 __ cmp(G3_elsize, 0); | |
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3119 __ br(Assembler::equal, true, Assembler::pt, entry_jbyte_arraycopy); |
0 | 3120 __ delayed()->signx(length, count); // length |
3121 | |
3122 __ cmp(G3_elsize, LogBytesPerShort); | |
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3123 __ br(Assembler::equal, true, Assembler::pt, entry_jshort_arraycopy); |
0 | 3124 __ delayed()->signx(length, count); // length |
3125 | |
3126 __ cmp(G3_elsize, LogBytesPerInt); | |
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3127 __ br(Assembler::equal, true, Assembler::pt, entry_jint_arraycopy); |
0 | 3128 __ delayed()->signx(length, count); // length |
3129 #ifdef ASSERT | |
3130 { Label L; | |
3839 | 3131 __ cmp_and_br_short(G3_elsize, LogBytesPerLong, Assembler::equal, Assembler::pt, L); |
0 | 3132 __ stop("must be long copy, but elsize is wrong"); |
3133 __ bind(L); | |
3134 } | |
3135 #endif | |
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3136 __ br(Assembler::always, false, Assembler::pt, entry_jlong_arraycopy); |
0 | 3137 __ delayed()->signx(length, count); // length |
3138 | |
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3139 // ObjArrayKlass |
0 | 3140 __ BIND(L_objArray); |
3141 // live at this point: G3_src_klass, G4_dst_klass, src[_pos], dst[_pos], length | |
3142 | |
3143 Label L_plain_copy, L_checkcast_copy; | |
3144 // test array classes for subtyping | |
3145 __ cmp(G3_src_klass, G4_dst_klass); // usual case is exact equality | |
3146 __ brx(Assembler::notEqual, true, Assembler::pn, L_checkcast_copy); | |
3147 __ delayed()->lduw(G4_dst_klass, lh_offset, O5_temp); // hoisted from below | |
3148 | |
3149 // Identically typed arrays can be copied without element-wise checks. | |
3150 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
3151 O5_temp, G5_lh, L_failed); | |
3152 | |
3153 __ add(src, arrayOopDesc::base_offset_in_bytes(T_OBJECT), src); //src offset | |
3154 __ add(dst, arrayOopDesc::base_offset_in_bytes(T_OBJECT), dst); //dst offset | |
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3155 __ sll_ptr(src_pos, LogBytesPerHeapOop, src_pos); |
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3156 __ sll_ptr(dst_pos, LogBytesPerHeapOop, dst_pos); |
0 | 3157 __ add(src, src_pos, from); // src_addr |
3158 __ add(dst, dst_pos, to); // dst_addr | |
3159 __ BIND(L_plain_copy); | |
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3160 __ br(Assembler::always, false, Assembler::pt, entry_oop_arraycopy); |
0 | 3161 __ delayed()->signx(length, count); // length |
3162 | |
3163 __ BIND(L_checkcast_copy); | |
3164 // live at this point: G3_src_klass, G4_dst_klass | |
3165 { | |
3166 // Before looking at dst.length, make sure dst is also an objArray. | |
3167 // lduw(G4_dst_klass, lh_offset, O5_temp); // hoisted to delay slot | |
3168 __ cmp(G5_lh, O5_temp); | |
3169 __ br(Assembler::notEqual, false, Assembler::pn, L_failed); | |
3170 | |
3171 // It is safe to examine both src.length and dst.length. | |
3172 __ delayed(); // match next insn to prev branch | |
3173 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
3174 O5_temp, G5_lh, L_failed); | |
3175 | |
3176 // Marshal the base address arguments now, freeing registers. | |
3177 __ add(src, arrayOopDesc::base_offset_in_bytes(T_OBJECT), src); //src offset | |
3178 __ add(dst, arrayOopDesc::base_offset_in_bytes(T_OBJECT), dst); //dst offset | |
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3179 __ sll_ptr(src_pos, LogBytesPerHeapOop, src_pos); |
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3180 __ sll_ptr(dst_pos, LogBytesPerHeapOop, dst_pos); |
0 | 3181 __ add(src, src_pos, from); // src_addr |
3182 __ add(dst, dst_pos, to); // dst_addr | |
3183 __ signx(length, count); // length (reloaded) | |
3184 | |
3185 Register sco_temp = O3; // this register is free now | |
3186 assert_different_registers(from, to, count, sco_temp, | |
3187 G4_dst_klass, G3_src_klass); | |
3188 | |
3189 // Generate the type check. | |
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3190 int sco_offset = in_bytes(Klass::super_check_offset_offset()); |
0 | 3191 __ lduw(G4_dst_klass, sco_offset, sco_temp); |
3192 generate_type_check(G3_src_klass, sco_temp, G4_dst_klass, | |
3193 O5_temp, L_plain_copy); | |
3194 | |
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3195 // Fetch destination element klass from the ObjArrayKlass header. |
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3196 int ek_offset = in_bytes(ObjArrayKlass::element_klass_offset()); |
0 | 3197 |
3198 // the checkcast_copy loop needs two extra arguments: | |
3199 __ ld_ptr(G4_dst_klass, ek_offset, O4); // dest elem klass | |
3200 // lduw(O4, sco_offset, O3); // sco of elem klass | |
3201 | |
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3202 __ br(Assembler::always, false, Assembler::pt, entry_checkcast_arraycopy); |
0 | 3203 __ delayed()->lduw(O4, sco_offset, O3); |
3204 } | |
3205 | |
3206 __ BIND(L_failed); | |
3207 __ retl(); | |
3208 __ delayed()->sub(G0, 1, O0); // return -1 | |
3209 return start; | |
3210 } | |
3211 | |
3892 | 3212 // |
3213 // Generate stub for heap zeroing. | |
3214 // "to" address is aligned to jlong (8 bytes). | |
3215 // | |
3216 // Arguments for generated stub: | |
3217 // to: O0 | |
3218 // count: O1 treated as signed (count of HeapWord) | |
3219 // count could be 0 | |
3220 // | |
3221 address generate_zero_aligned_words(const char* name) { | |
3222 __ align(CodeEntryAlignment); | |
3223 StubCodeMark mark(this, "StubRoutines", name); | |
3224 address start = __ pc(); | |
3225 | |
3226 const Register to = O0; // source array address | |
3227 const Register count = O1; // HeapWords count | |
3228 const Register temp = O2; // scratch | |
3229 | |
3230 Label Ldone; | |
3231 __ sllx(count, LogHeapWordSize, count); // to bytes count | |
3232 // Use BIS for zeroing | |
3233 __ bis_zeroing(to, count, temp, Ldone); | |
3234 __ bind(Ldone); | |
3235 __ retl(); | |
3236 __ delayed()->nop(); | |
3237 return start; | |
3238 } | |
3239 | |
0 | 3240 void generate_arraycopy_stubs() { |
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3241 address entry; |
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3242 address entry_jbyte_arraycopy; |
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3243 address entry_jshort_arraycopy; |
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3244 address entry_jint_arraycopy; |
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3245 address entry_oop_arraycopy; |
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3246 address entry_jlong_arraycopy; |
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3247 address entry_checkcast_arraycopy; |
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3248 |
2324 | 3249 //*** jbyte |
3250 // Always need aligned and unaligned versions | |
3251 StubRoutines::_jbyte_disjoint_arraycopy = generate_disjoint_byte_copy(false, &entry, | |
3252 "jbyte_disjoint_arraycopy"); | |
3253 StubRoutines::_jbyte_arraycopy = generate_conjoint_byte_copy(false, entry, | |
3254 &entry_jbyte_arraycopy, | |
3255 "jbyte_arraycopy"); | |
3256 StubRoutines::_arrayof_jbyte_disjoint_arraycopy = generate_disjoint_byte_copy(true, &entry, | |
3257 "arrayof_jbyte_disjoint_arraycopy"); | |
3258 StubRoutines::_arrayof_jbyte_arraycopy = generate_conjoint_byte_copy(true, entry, NULL, | |
3259 "arrayof_jbyte_arraycopy"); | |
3260 | |
3261 //*** jshort | |
3262 // Always need aligned and unaligned versions | |
3263 StubRoutines::_jshort_disjoint_arraycopy = generate_disjoint_short_copy(false, &entry, | |
3264 "jshort_disjoint_arraycopy"); | |
3265 StubRoutines::_jshort_arraycopy = generate_conjoint_short_copy(false, entry, | |
3266 &entry_jshort_arraycopy, | |
3267 "jshort_arraycopy"); | |
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3268 StubRoutines::_arrayof_jshort_disjoint_arraycopy = generate_disjoint_short_copy(true, &entry, |
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3269 "arrayof_jshort_disjoint_arraycopy"); |
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3270 StubRoutines::_arrayof_jshort_arraycopy = generate_conjoint_short_copy(true, entry, NULL, |
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3271 "arrayof_jshort_arraycopy"); |
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3272 |
2324 | 3273 //*** jint |
3274 // Aligned versions | |
3275 StubRoutines::_arrayof_jint_disjoint_arraycopy = generate_disjoint_int_copy(true, &entry, | |
3276 "arrayof_jint_disjoint_arraycopy"); | |
3277 StubRoutines::_arrayof_jint_arraycopy = generate_conjoint_int_copy(true, entry, &entry_jint_arraycopy, | |
3278 "arrayof_jint_arraycopy"); | |
0 | 3279 #ifdef _LP64 |
2324 | 3280 // In 64 bit we need both aligned and unaligned versions of jint arraycopy. |
3281 // entry_jint_arraycopy always points to the unaligned version (notice that we overwrite it). | |
3282 StubRoutines::_jint_disjoint_arraycopy = generate_disjoint_int_copy(false, &entry, | |
3283 "jint_disjoint_arraycopy"); | |
3284 StubRoutines::_jint_arraycopy = generate_conjoint_int_copy(false, entry, | |
3285 &entry_jint_arraycopy, | |
3286 "jint_arraycopy"); | |
3287 #else | |
3288 // In 32 bit jints are always HeapWordSize aligned, so always use the aligned version | |
3289 // (in fact in 32bit we always have a pre-loop part even in the aligned version, | |
3290 // because it uses 64-bit loads/stores, so the aligned flag is actually ignored). | |
3291 StubRoutines::_jint_disjoint_arraycopy = StubRoutines::_arrayof_jint_disjoint_arraycopy; | |
3292 StubRoutines::_jint_arraycopy = StubRoutines::_arrayof_jint_arraycopy; | |
0 | 3293 #endif |
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3294 |
2324 | 3295 |
3296 //*** jlong | |
3297 // It is always aligned | |
3298 StubRoutines::_arrayof_jlong_disjoint_arraycopy = generate_disjoint_long_copy(true, &entry, | |
3299 "arrayof_jlong_disjoint_arraycopy"); | |
3300 StubRoutines::_arrayof_jlong_arraycopy = generate_conjoint_long_copy(true, entry, &entry_jlong_arraycopy, | |
3301 "arrayof_jlong_arraycopy"); | |
3302 StubRoutines::_jlong_disjoint_arraycopy = StubRoutines::_arrayof_jlong_disjoint_arraycopy; | |
3303 StubRoutines::_jlong_arraycopy = StubRoutines::_arrayof_jlong_arraycopy; | |
3304 | |
3305 | |
3306 //*** oops | |
3307 // Aligned versions | |
3308 StubRoutines::_arrayof_oop_disjoint_arraycopy = generate_disjoint_oop_copy(true, &entry, | |
3309 "arrayof_oop_disjoint_arraycopy"); | |
3310 StubRoutines::_arrayof_oop_arraycopy = generate_conjoint_oop_copy(true, entry, &entry_oop_arraycopy, | |
3311 "arrayof_oop_arraycopy"); | |
3312 // Aligned versions without pre-barriers | |
3313 StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = generate_disjoint_oop_copy(true, &entry, | |
3314 "arrayof_oop_disjoint_arraycopy_uninit", | |
3315 /*dest_uninitialized*/true); | |
3316 StubRoutines::_arrayof_oop_arraycopy_uninit = generate_conjoint_oop_copy(true, entry, NULL, | |
3317 "arrayof_oop_arraycopy_uninit", | |
3318 /*dest_uninitialized*/true); | |
3319 #ifdef _LP64 | |
3320 if (UseCompressedOops) { | |
3321 // With compressed oops we need unaligned versions, notice that we overwrite entry_oop_arraycopy. | |
3322 StubRoutines::_oop_disjoint_arraycopy = generate_disjoint_oop_copy(false, &entry, | |
3323 "oop_disjoint_arraycopy"); | |
3324 StubRoutines::_oop_arraycopy = generate_conjoint_oop_copy(false, entry, &entry_oop_arraycopy, | |
3325 "oop_arraycopy"); | |
3326 // Unaligned versions without pre-barriers | |
3327 StubRoutines::_oop_disjoint_arraycopy_uninit = generate_disjoint_oop_copy(false, &entry, | |
3328 "oop_disjoint_arraycopy_uninit", | |
3329 /*dest_uninitialized*/true); | |
3330 StubRoutines::_oop_arraycopy_uninit = generate_conjoint_oop_copy(false, entry, NULL, | |
3331 "oop_arraycopy_uninit", | |
3332 /*dest_uninitialized*/true); | |
3333 } else | |
3334 #endif | |
3335 { | |
3336 // oop arraycopy is always aligned on 32bit and 64bit without compressed oops | |
3337 StubRoutines::_oop_disjoint_arraycopy = StubRoutines::_arrayof_oop_disjoint_arraycopy; | |
3338 StubRoutines::_oop_arraycopy = StubRoutines::_arrayof_oop_arraycopy; | |
3339 StubRoutines::_oop_disjoint_arraycopy_uninit = StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit; | |
3340 StubRoutines::_oop_arraycopy_uninit = StubRoutines::_arrayof_oop_arraycopy_uninit; | |
3341 } | |
3342 | |
3343 StubRoutines::_checkcast_arraycopy = generate_checkcast_copy("checkcast_arraycopy", &entry_checkcast_arraycopy); | |
3344 StubRoutines::_checkcast_arraycopy_uninit = generate_checkcast_copy("checkcast_arraycopy_uninit", NULL, | |
3345 /*dest_uninitialized*/true); | |
3346 | |
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3347 StubRoutines::_unsafe_arraycopy = generate_unsafe_copy("unsafe_arraycopy", |
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3348 entry_jbyte_arraycopy, |
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3349 entry_jshort_arraycopy, |
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3350 entry_jint_arraycopy, |
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3351 entry_jlong_arraycopy); |
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3352 StubRoutines::_generic_arraycopy = generate_generic_copy("generic_arraycopy", |
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3353 entry_jbyte_arraycopy, |
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3354 entry_jshort_arraycopy, |
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3355 entry_jint_arraycopy, |
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3356 entry_oop_arraycopy, |
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3357 entry_jlong_arraycopy, |
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3358 entry_checkcast_arraycopy); |
1763 | 3359 |
3360 StubRoutines::_jbyte_fill = generate_fill(T_BYTE, false, "jbyte_fill"); | |
3361 StubRoutines::_jshort_fill = generate_fill(T_SHORT, false, "jshort_fill"); | |
3362 StubRoutines::_jint_fill = generate_fill(T_INT, false, "jint_fill"); | |
3363 StubRoutines::_arrayof_jbyte_fill = generate_fill(T_BYTE, true, "arrayof_jbyte_fill"); | |
3364 StubRoutines::_arrayof_jshort_fill = generate_fill(T_SHORT, true, "arrayof_jshort_fill"); | |
3365 StubRoutines::_arrayof_jint_fill = generate_fill(T_INT, true, "arrayof_jint_fill"); | |
3892 | 3366 |
3367 if (UseBlockZeroing) { | |
3368 StubRoutines::_zero_aligned_words = generate_zero_aligned_words("zero_aligned_words"); | |
3369 } | |
0 | 3370 } |
3371 | |
3372 void generate_initial() { | |
3373 // Generates all stubs and initializes the entry points | |
3374 | |
3375 //------------------------------------------------------------------------------------------------------------------------ | |
3376 // entry points that exist in all platforms | |
3377 // Note: This is code that could be shared among different platforms - however the benefit seems to be smaller than | |
3378 // the disadvantage of having a much more complicated generator structure. See also comment in stubRoutines.hpp. | |
3379 StubRoutines::_forward_exception_entry = generate_forward_exception(); | |
3380 | |
3381 StubRoutines::_call_stub_entry = generate_call_stub(StubRoutines::_call_stub_return_address); | |
3382 StubRoutines::_catch_exception_entry = generate_catch_exception(); | |
3383 | |
3384 //------------------------------------------------------------------------------------------------------------------------ | |
3385 // entry points that are platform specific | |
3386 StubRoutines::Sparc::_test_stop_entry = generate_test_stop(); | |
3387 | |
3388 StubRoutines::Sparc::_stop_subroutine_entry = generate_stop_subroutine(); | |
3389 StubRoutines::Sparc::_flush_callers_register_windows_entry = generate_flush_callers_register_windows(); | |
3390 | |
3391 #if !defined(COMPILER2) && !defined(_LP64) | |
3392 StubRoutines::_atomic_xchg_entry = generate_atomic_xchg(); | |
3393 StubRoutines::_atomic_cmpxchg_entry = generate_atomic_cmpxchg(); | |
3394 StubRoutines::_atomic_add_entry = generate_atomic_add(); | |
3395 StubRoutines::_atomic_xchg_ptr_entry = StubRoutines::_atomic_xchg_entry; | |
3396 StubRoutines::_atomic_cmpxchg_ptr_entry = StubRoutines::_atomic_cmpxchg_entry; | |
3397 StubRoutines::_atomic_cmpxchg_long_entry = generate_atomic_cmpxchg_long(); | |
3398 StubRoutines::_atomic_add_ptr_entry = StubRoutines::_atomic_add_entry; | |
3399 #endif // COMPILER2 !=> _LP64 | |
3451
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3400 |
4743 | 3401 // Build this early so it's available for the interpreter. |
3402 StubRoutines::_throw_StackOverflowError_entry = generate_throw_exception("StackOverflowError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_StackOverflowError)); | |
0 | 3403 } |
3404 | |
3405 | |
3406 void generate_all() { | |
3407 // Generates all stubs and initializes the entry points | |
3408 | |
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3409 // Generate partial_subtype_check first here since its code depends on |
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3410 // UseZeroBaseCompressedOops which is defined after heap initialization. |
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3411 StubRoutines::Sparc::_partial_subtype_check = generate_partial_subtype_check(); |
0 | 3412 // These entry points require SharedInfo::stack0 to be set up in non-core builds |
3937 | 3413 StubRoutines::_throw_AbstractMethodError_entry = generate_throw_exception("AbstractMethodError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_AbstractMethodError)); |
3414 StubRoutines::_throw_IncompatibleClassChangeError_entry= generate_throw_exception("IncompatibleClassChangeError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_IncompatibleClassChangeError)); | |
3415 StubRoutines::_throw_NullPointerException_at_call_entry= generate_throw_exception("NullPointerException at call throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException_at_call)); | |
0 | 3416 |
3417 StubRoutines::_handler_for_unsafe_access_entry = | |
3418 generate_handler_for_unsafe_access(); | |
3419 | |
3420 // support for verify_oop (must happen after universe_init) | |
3421 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop_subroutine(); | |
3422 | |
3423 // arraycopy stubs used by compilers | |
3424 generate_arraycopy_stubs(); | |
1174
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3425 |
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3426 // Don't initialize the platform math functions since sparc |
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3427 // doesn't have intrinsics for these operations. |
0 | 3428 } |
3429 | |
3430 | |
3431 public: | |
3432 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) { | |
3433 // replace the standard masm with a special one: | |
3434 _masm = new MacroAssembler(code); | |
3435 | |
3436 _stub_count = !all ? 0x100 : 0x200; | |
3437 if (all) { | |
3438 generate_all(); | |
3439 } else { | |
3440 generate_initial(); | |
3441 } | |
3442 | |
3443 // make sure this stub is available for all local calls | |
3444 if (_atomic_add_stub.is_unbound()) { | |
3445 // generate a second time, if necessary | |
3446 (void) generate_atomic_add(); | |
3447 } | |
3448 } | |
3449 | |
3450 | |
3451 private: | |
3452 int _stub_count; | |
3453 void stub_prolog(StubCodeDesc* cdesc) { | |
3454 # ifdef ASSERT | |
3455 // put extra information in the stub code, to make it more readable | |
3456 #ifdef _LP64 | |
3457 // Write the high part of the address | |
3458 // [RGV] Check if there is a dependency on the size of this prolog | |
3459 __ emit_data((intptr_t)cdesc >> 32, relocInfo::none); | |
3460 #endif | |
3461 __ emit_data((intptr_t)cdesc, relocInfo::none); | |
3462 __ emit_data(++_stub_count, relocInfo::none); | |
3463 # endif | |
3464 align(true); | |
3465 } | |
3466 | |
3467 void align(bool at_header = false) { | |
3468 // %%%%% move this constant somewhere else | |
3469 // UltraSPARC cache line size is 8 instructions: | |
3470 const unsigned int icache_line_size = 32; | |
3471 const unsigned int icache_half_line_size = 16; | |
3472 | |
3473 if (at_header) { | |
3474 while ((intptr_t)(__ pc()) % icache_line_size != 0) { | |
3475 __ emit_data(0, relocInfo::none); | |
3476 } | |
3477 } else { | |
3478 while ((intptr_t)(__ pc()) % icache_half_line_size != 0) { | |
3479 __ nop(); | |
3480 } | |
3481 } | |
3482 } | |
3483 | |
3484 }; // end class declaration | |
3485 | |
3486 void StubGenerator_generate(CodeBuffer* code, bool all) { | |
3487 StubGenerator g(code, all); | |
3488 } |