Mercurial > hg > truffle
annotate src/cpu/sparc/vm/stubGenerator_sparc.cpp @ 2480:4b95bbb36464
7035870: JSR 292: Zero support
Summary: This adds support for JSR 292 to Zero.
Reviewed-by: twisti
Contributed-by: Gary Benson <gbenson@redhat.com>
author | twisti |
---|---|
date | Tue, 12 Apr 2011 02:40:23 -0700 |
parents | 0ac769a57c64 |
children | 38fa55e5e792 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "asm/assembler.hpp" | |
27 #include "assembler_sparc.inline.hpp" | |
28 #include "interpreter/interpreter.hpp" | |
29 #include "nativeInst_sparc.hpp" | |
30 #include "oops/instanceOop.hpp" | |
31 #include "oops/methodOop.hpp" | |
32 #include "oops/objArrayKlass.hpp" | |
33 #include "oops/oop.inline.hpp" | |
34 #include "prims/methodHandles.hpp" | |
35 #include "runtime/frame.inline.hpp" | |
36 #include "runtime/handles.inline.hpp" | |
37 #include "runtime/sharedRuntime.hpp" | |
38 #include "runtime/stubCodeGenerator.hpp" | |
39 #include "runtime/stubRoutines.hpp" | |
40 #include "utilities/top.hpp" | |
41 #ifdef TARGET_OS_FAMILY_linux | |
42 # include "thread_linux.inline.hpp" | |
43 #endif | |
44 #ifdef TARGET_OS_FAMILY_solaris | |
45 # include "thread_solaris.inline.hpp" | |
46 #endif | |
47 #ifdef COMPILER2 | |
48 #include "opto/runtime.hpp" | |
49 #endif | |
0 | 50 |
51 // Declaration and definition of StubGenerator (no .hpp file). | |
52 // For a more detailed description of the stub routine structure | |
53 // see the comment in stubRoutines.hpp. | |
54 | |
55 #define __ _masm-> | |
56 | |
57 #ifdef PRODUCT | |
58 #define BLOCK_COMMENT(str) /* nothing */ | |
59 #else | |
60 #define BLOCK_COMMENT(str) __ block_comment(str) | |
61 #endif | |
62 | |
63 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") | |
64 | |
65 // Note: The register L7 is used as L7_thread_cache, and may not be used | |
66 // any other way within this module. | |
67 | |
68 | |
69 static const Register& Lstub_temp = L2; | |
70 | |
71 // ------------------------------------------------------------------------------------------------------------------------- | |
72 // Stub Code definitions | |
73 | |
74 static address handle_unsafe_access() { | |
75 JavaThread* thread = JavaThread::current(); | |
76 address pc = thread->saved_exception_pc(); | |
77 address npc = thread->saved_exception_npc(); | |
78 // pc is the instruction which we must emulate | |
79 // doing a no-op is fine: return garbage from the load | |
80 | |
81 // request an async exception | |
82 thread->set_pending_unsafe_access_error(); | |
83 | |
84 // return address of next instruction to execute | |
85 return npc; | |
86 } | |
87 | |
88 class StubGenerator: public StubCodeGenerator { | |
89 private: | |
90 | |
91 #ifdef PRODUCT | |
92 #define inc_counter_np(a,b,c) (0) | |
93 #else | |
94 #define inc_counter_np(counter, t1, t2) \ | |
95 BLOCK_COMMENT("inc_counter " #counter); \ | |
727 | 96 __ inc_counter(&counter, t1, t2); |
0 | 97 #endif |
98 | |
99 //---------------------------------------------------------------------------------------------------- | |
100 // Call stubs are used to call Java from C | |
101 | |
102 address generate_call_stub(address& return_pc) { | |
103 StubCodeMark mark(this, "StubRoutines", "call_stub"); | |
104 address start = __ pc(); | |
105 | |
106 // Incoming arguments: | |
107 // | |
108 // o0 : call wrapper address | |
109 // o1 : result (address) | |
110 // o2 : result type | |
111 // o3 : method | |
112 // o4 : (interpreter) entry point | |
113 // o5 : parameters (address) | |
114 // [sp + 0x5c]: parameter size (in words) | |
115 // [sp + 0x60]: thread | |
116 // | |
117 // +---------------+ <--- sp + 0 | |
118 // | | | |
119 // . reg save area . | |
120 // | | | |
121 // +---------------+ <--- sp + 0x40 | |
122 // | | | |
123 // . extra 7 slots . | |
124 // | | | |
125 // +---------------+ <--- sp + 0x5c | |
126 // | param. size | | |
127 // +---------------+ <--- sp + 0x60 | |
128 // | thread | | |
129 // +---------------+ | |
130 // | | | |
131 | |
132 // note: if the link argument position changes, adjust | |
133 // the code in frame::entry_frame_call_wrapper() | |
134 | |
135 const Argument link = Argument(0, false); // used only for GC | |
136 const Argument result = Argument(1, false); | |
137 const Argument result_type = Argument(2, false); | |
138 const Argument method = Argument(3, false); | |
139 const Argument entry_point = Argument(4, false); | |
140 const Argument parameters = Argument(5, false); | |
141 const Argument parameter_size = Argument(6, false); | |
142 const Argument thread = Argument(7, false); | |
143 | |
144 // setup thread register | |
145 __ ld_ptr(thread.as_address(), G2_thread); | |
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146 __ reinit_heapbase(); |
0 | 147 |
148 #ifdef ASSERT | |
149 // make sure we have no pending exceptions | |
150 { const Register t = G3_scratch; | |
151 Label L; | |
152 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), t); | |
153 __ br_null(t, false, Assembler::pt, L); | |
154 __ delayed()->nop(); | |
155 __ stop("StubRoutines::call_stub: entered with pending exception"); | |
156 __ bind(L); | |
157 } | |
158 #endif | |
159 | |
160 // create activation frame & allocate space for parameters | |
161 { const Register t = G3_scratch; | |
162 __ ld_ptr(parameter_size.as_address(), t); // get parameter size (in words) | |
163 __ add(t, frame::memory_parameter_word_sp_offset, t); // add space for save area (in words) | |
164 __ round_to(t, WordsPerLong); // make sure it is multiple of 2 (in words) | |
1506 | 165 __ sll(t, Interpreter::logStackElementSize, t); // compute number of bytes |
0 | 166 __ neg(t); // negate so it can be used with save |
167 __ save(SP, t, SP); // setup new frame | |
168 } | |
169 | |
170 // +---------------+ <--- sp + 0 | |
171 // | | | |
172 // . reg save area . | |
173 // | | | |
174 // +---------------+ <--- sp + 0x40 | |
175 // | | | |
176 // . extra 7 slots . | |
177 // | | | |
178 // +---------------+ <--- sp + 0x5c | |
179 // | empty slot | (only if parameter size is even) | |
180 // +---------------+ | |
181 // | | | |
182 // . parameters . | |
183 // | | | |
184 // +---------------+ <--- fp + 0 | |
185 // | | | |
186 // . reg save area . | |
187 // | | | |
188 // +---------------+ <--- fp + 0x40 | |
189 // | | | |
190 // . extra 7 slots . | |
191 // | | | |
192 // +---------------+ <--- fp + 0x5c | |
193 // | param. size | | |
194 // +---------------+ <--- fp + 0x60 | |
195 // | thread | | |
196 // +---------------+ | |
197 // | | | |
198 | |
199 // pass parameters if any | |
200 BLOCK_COMMENT("pass parameters if any"); | |
201 { const Register src = parameters.as_in().as_register(); | |
202 const Register dst = Lentry_args; | |
203 const Register tmp = G3_scratch; | |
204 const Register cnt = G4_scratch; | |
205 | |
206 // test if any parameters & setup of Lentry_args | |
207 Label exit; | |
208 __ ld_ptr(parameter_size.as_in().as_address(), cnt); // parameter counter | |
209 __ add( FP, STACK_BIAS, dst ); | |
210 __ tst(cnt); | |
211 __ br(Assembler::zero, false, Assembler::pn, exit); | |
212 __ delayed()->sub(dst, BytesPerWord, dst); // setup Lentry_args | |
213 | |
214 // copy parameters if any | |
215 Label loop; | |
216 __ BIND(loop); | |
217 // Store parameter value | |
218 __ ld_ptr(src, 0, tmp); | |
219 __ add(src, BytesPerWord, src); | |
1506 | 220 __ st_ptr(tmp, dst, 0); |
0 | 221 __ deccc(cnt); |
222 __ br(Assembler::greater, false, Assembler::pt, loop); | |
1506 | 223 __ delayed()->sub(dst, Interpreter::stackElementSize, dst); |
0 | 224 |
225 // done | |
226 __ BIND(exit); | |
227 } | |
228 | |
229 // setup parameters, method & call Java function | |
230 #ifdef ASSERT | |
231 // layout_activation_impl checks it's notion of saved SP against | |
232 // this register, so if this changes update it as well. | |
233 const Register saved_SP = Lscratch; | |
234 __ mov(SP, saved_SP); // keep track of SP before call | |
235 #endif | |
236 | |
237 // setup parameters | |
238 const Register t = G3_scratch; | |
239 __ ld_ptr(parameter_size.as_in().as_address(), t); // get parameter size (in words) | |
1506 | 240 __ sll(t, Interpreter::logStackElementSize, t); // compute number of bytes |
0 | 241 __ sub(FP, t, Gargs); // setup parameter pointer |
242 #ifdef _LP64 | |
243 __ add( Gargs, STACK_BIAS, Gargs ); // Account for LP64 stack bias | |
244 #endif | |
245 __ mov(SP, O5_savedSP); | |
246 | |
247 | |
248 // do the call | |
249 // | |
250 // the following register must be setup: | |
251 // | |
252 // G2_thread | |
253 // G5_method | |
254 // Gargs | |
255 BLOCK_COMMENT("call Java function"); | |
256 __ jmpl(entry_point.as_in().as_register(), G0, O7); | |
257 __ delayed()->mov(method.as_in().as_register(), G5_method); // setup method | |
258 | |
259 BLOCK_COMMENT("call_stub_return_address:"); | |
260 return_pc = __ pc(); | |
261 | |
262 // The callee, if it wasn't interpreted, can return with SP changed so | |
263 // we can no longer assert of change of SP. | |
264 | |
265 // store result depending on type | |
266 // (everything that is not T_OBJECT, T_LONG, T_FLOAT, or T_DOUBLE | |
267 // is treated as T_INT) | |
268 { const Register addr = result .as_in().as_register(); | |
269 const Register type = result_type.as_in().as_register(); | |
270 Label is_long, is_float, is_double, is_object, exit; | |
271 __ cmp(type, T_OBJECT); __ br(Assembler::equal, false, Assembler::pn, is_object); | |
272 __ delayed()->cmp(type, T_FLOAT); __ br(Assembler::equal, false, Assembler::pn, is_float); | |
273 __ delayed()->cmp(type, T_DOUBLE); __ br(Assembler::equal, false, Assembler::pn, is_double); | |
274 __ delayed()->cmp(type, T_LONG); __ br(Assembler::equal, false, Assembler::pn, is_long); | |
275 __ delayed()->nop(); | |
276 | |
277 // store int result | |
278 __ st(O0, addr, G0); | |
279 | |
280 __ BIND(exit); | |
281 __ ret(); | |
282 __ delayed()->restore(); | |
283 | |
284 __ BIND(is_object); | |
285 __ ba(false, exit); | |
286 __ delayed()->st_ptr(O0, addr, G0); | |
287 | |
288 __ BIND(is_float); | |
289 __ ba(false, exit); | |
290 __ delayed()->stf(FloatRegisterImpl::S, F0, addr, G0); | |
291 | |
292 __ BIND(is_double); | |
293 __ ba(false, exit); | |
294 __ delayed()->stf(FloatRegisterImpl::D, F0, addr, G0); | |
295 | |
296 __ BIND(is_long); | |
297 #ifdef _LP64 | |
298 __ ba(false, exit); | |
299 __ delayed()->st_long(O0, addr, G0); // store entire long | |
300 #else | |
301 #if defined(COMPILER2) | |
302 // All return values are where we want them, except for Longs. C2 returns | |
303 // longs in G1 in the 32-bit build whereas the interpreter wants them in O0/O1. | |
304 // Since the interpreter will return longs in G1 and O0/O1 in the 32bit | |
305 // build we simply always use G1. | |
306 // Note: I tried to make c2 return longs in O0/O1 and G1 so we wouldn't have to | |
307 // do this here. Unfortunately if we did a rethrow we'd see an machepilog node | |
308 // first which would move g1 -> O0/O1 and destroy the exception we were throwing. | |
309 | |
310 __ ba(false, exit); | |
311 __ delayed()->stx(G1, addr, G0); // store entire long | |
312 #else | |
313 __ st(O1, addr, BytesPerInt); | |
314 __ ba(false, exit); | |
315 __ delayed()->st(O0, addr, G0); | |
316 #endif /* COMPILER2 */ | |
317 #endif /* _LP64 */ | |
318 } | |
319 return start; | |
320 } | |
321 | |
322 | |
323 //---------------------------------------------------------------------------------------------------- | |
324 // Return point for a Java call if there's an exception thrown in Java code. | |
325 // The exception is caught and transformed into a pending exception stored in | |
326 // JavaThread that can be tested from within the VM. | |
327 // | |
328 // Oexception: exception oop | |
329 | |
330 address generate_catch_exception() { | |
331 StubCodeMark mark(this, "StubRoutines", "catch_exception"); | |
332 | |
333 address start = __ pc(); | |
334 // verify that thread corresponds | |
335 __ verify_thread(); | |
336 | |
337 const Register& temp_reg = Gtemp; | |
727 | 338 Address pending_exception_addr (G2_thread, Thread::pending_exception_offset()); |
339 Address exception_file_offset_addr(G2_thread, Thread::exception_file_offset ()); | |
340 Address exception_line_offset_addr(G2_thread, Thread::exception_line_offset ()); | |
0 | 341 |
342 // set pending exception | |
343 __ verify_oop(Oexception); | |
344 __ st_ptr(Oexception, pending_exception_addr); | |
345 __ set((intptr_t)__FILE__, temp_reg); | |
346 __ st_ptr(temp_reg, exception_file_offset_addr); | |
347 __ set((intptr_t)__LINE__, temp_reg); | |
348 __ st(temp_reg, exception_line_offset_addr); | |
349 | |
350 // complete return to VM | |
351 assert(StubRoutines::_call_stub_return_address != NULL, "must have been generated before"); | |
352 | |
727 | 353 AddressLiteral stub_ret(StubRoutines::_call_stub_return_address); |
354 __ jump_to(stub_ret, temp_reg); | |
0 | 355 __ delayed()->nop(); |
356 | |
357 return start; | |
358 } | |
359 | |
360 | |
361 //---------------------------------------------------------------------------------------------------- | |
362 // Continuation point for runtime calls returning with a pending exception | |
363 // The pending exception check happened in the runtime or native call stub | |
364 // The pending exception in Thread is converted into a Java-level exception | |
365 // | |
366 // Contract with Java-level exception handler: O0 = exception | |
367 // O1 = throwing pc | |
368 | |
369 address generate_forward_exception() { | |
370 StubCodeMark mark(this, "StubRoutines", "forward_exception"); | |
371 address start = __ pc(); | |
372 | |
373 // Upon entry, O7 has the return address returning into Java | |
374 // (interpreted or compiled) code; i.e. the return address | |
375 // becomes the throwing pc. | |
376 | |
377 const Register& handler_reg = Gtemp; | |
378 | |
727 | 379 Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
0 | 380 |
381 #ifdef ASSERT | |
382 // make sure that this code is only executed if there is a pending exception | |
383 { Label L; | |
384 __ ld_ptr(exception_addr, Gtemp); | |
385 __ br_notnull(Gtemp, false, Assembler::pt, L); | |
386 __ delayed()->nop(); | |
387 __ stop("StubRoutines::forward exception: no pending exception (1)"); | |
388 __ bind(L); | |
389 } | |
390 #endif | |
391 | |
392 // compute exception handler into handler_reg | |
393 __ get_thread(); | |
394 __ ld_ptr(exception_addr, Oexception); | |
395 __ verify_oop(Oexception); | |
396 __ save_frame(0); // compensates for compiler weakness | |
397 __ add(O7->after_save(), frame::pc_return_offset, Lscratch); // save the issuing PC | |
398 BLOCK_COMMENT("call exception_handler_for_return_address"); | |
1295 | 399 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), G2_thread, Lscratch); |
0 | 400 __ mov(O0, handler_reg); |
401 __ restore(); // compensates for compiler weakness | |
402 | |
403 __ ld_ptr(exception_addr, Oexception); | |
404 __ add(O7, frame::pc_return_offset, Oissuing_pc); // save the issuing PC | |
405 | |
406 #ifdef ASSERT | |
407 // make sure exception is set | |
408 { Label L; | |
409 __ br_notnull(Oexception, false, Assembler::pt, L); | |
410 __ delayed()->nop(); | |
411 __ stop("StubRoutines::forward exception: no pending exception (2)"); | |
412 __ bind(L); | |
413 } | |
414 #endif | |
415 // jump to exception handler | |
416 __ jmp(handler_reg, 0); | |
417 // clear pending exception | |
418 __ delayed()->st_ptr(G0, exception_addr); | |
419 | |
420 return start; | |
421 } | |
422 | |
423 | |
424 //------------------------------------------------------------------------------------------------------------------------ | |
425 // Continuation point for throwing of implicit exceptions that are not handled in | |
426 // the current activation. Fabricates an exception oop and initiates normal | |
427 // exception dispatching in this frame. Only callee-saved registers are preserved | |
428 // (through the normal register window / RegisterMap handling). | |
429 // If the compiler needs all registers to be preserved between the fault | |
430 // point and the exception handler then it must assume responsibility for that in | |
431 // AbstractCompiler::continuation_for_implicit_null_exception or | |
432 // continuation_for_implicit_division_by_zero_exception. All other implicit | |
433 // exceptions (e.g., NullPointerException or AbstractMethodError on entry) are | |
434 // either at call sites or otherwise assume that stack unwinding will be initiated, | |
435 // so caller saved registers were assumed volatile in the compiler. | |
436 | |
437 // Note that we generate only this stub into a RuntimeStub, because it needs to be | |
438 // properly traversed and ignored during GC, so we change the meaning of the "__" | |
439 // macro within this method. | |
440 #undef __ | |
441 #define __ masm-> | |
442 | |
443 address generate_throw_exception(const char* name, address runtime_entry, bool restore_saved_exception_pc) { | |
444 #ifdef ASSERT | |
445 int insts_size = VerifyThread ? 1 * K : 600; | |
446 #else | |
447 int insts_size = VerifyThread ? 1 * K : 256; | |
448 #endif /* ASSERT */ | |
449 int locs_size = 32; | |
450 | |
451 CodeBuffer code(name, insts_size, locs_size); | |
452 MacroAssembler* masm = new MacroAssembler(&code); | |
453 | |
454 __ verify_thread(); | |
455 | |
456 // This is an inlined and slightly modified version of call_VM | |
457 // which has the ability to fetch the return PC out of thread-local storage | |
458 __ assert_not_delayed(); | |
459 | |
460 // Note that we always push a frame because on the SPARC | |
461 // architecture, for all of our implicit exception kinds at call | |
462 // sites, the implicit exception is taken before the callee frame | |
463 // is pushed. | |
464 __ save_frame(0); | |
465 | |
466 int frame_complete = __ offset(); | |
467 | |
468 if (restore_saved_exception_pc) { | |
727 | 469 __ ld_ptr(G2_thread, JavaThread::saved_exception_pc_offset(), I7); |
0 | 470 __ sub(I7, frame::pc_return_offset, I7); |
471 } | |
472 | |
473 // Note that we always have a runtime stub frame on the top of stack by this point | |
474 Register last_java_sp = SP; | |
475 // 64-bit last_java_sp is biased! | |
476 __ set_last_Java_frame(last_java_sp, G0); | |
477 if (VerifyThread) __ mov(G2_thread, O0); // about to be smashed; pass early | |
478 __ save_thread(noreg); | |
479 // do the call | |
480 BLOCK_COMMENT("call runtime_entry"); | |
481 __ call(runtime_entry, relocInfo::runtime_call_type); | |
482 if (!VerifyThread) | |
483 __ delayed()->mov(G2_thread, O0); // pass thread as first argument | |
484 else | |
485 __ delayed()->nop(); // (thread already passed) | |
486 __ restore_thread(noreg); | |
487 __ reset_last_Java_frame(); | |
488 | |
489 // check for pending exceptions. use Gtemp as scratch register. | |
490 #ifdef ASSERT | |
491 Label L; | |
492 | |
727 | 493 Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
0 | 494 Register scratch_reg = Gtemp; |
495 __ ld_ptr(exception_addr, scratch_reg); | |
496 __ br_notnull(scratch_reg, false, Assembler::pt, L); | |
497 __ delayed()->nop(); | |
498 __ should_not_reach_here(); | |
499 __ bind(L); | |
500 #endif // ASSERT | |
501 BLOCK_COMMENT("call forward_exception_entry"); | |
502 __ call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type); | |
503 // we use O7 linkage so that forward_exception_entry has the issuing PC | |
504 __ delayed()->restore(); | |
505 | |
506 RuntimeStub* stub = RuntimeStub::new_runtime_stub(name, &code, frame_complete, masm->total_frame_size_in_bytes(0), NULL, false); | |
507 return stub->entry_point(); | |
508 } | |
509 | |
510 #undef __ | |
511 #define __ _masm-> | |
512 | |
513 | |
514 // Generate a routine that sets all the registers so we | |
515 // can tell if the stop routine prints them correctly. | |
516 address generate_test_stop() { | |
517 StubCodeMark mark(this, "StubRoutines", "test_stop"); | |
518 address start = __ pc(); | |
519 | |
520 int i; | |
521 | |
522 __ save_frame(0); | |
523 | |
524 static jfloat zero = 0.0, one = 1.0; | |
525 | |
526 // put addr in L0, then load through L0 to F0 | |
527 __ set((intptr_t)&zero, L0); __ ldf( FloatRegisterImpl::S, L0, 0, F0); | |
528 __ set((intptr_t)&one, L0); __ ldf( FloatRegisterImpl::S, L0, 0, F1); // 1.0 to F1 | |
529 | |
530 // use add to put 2..18 in F2..F18 | |
531 for ( i = 2; i <= 18; ++i ) { | |
532 __ fadd( FloatRegisterImpl::S, F1, as_FloatRegister(i-1), as_FloatRegister(i)); | |
533 } | |
534 | |
535 // Now put double 2 in F16, double 18 in F18 | |
536 __ ftof( FloatRegisterImpl::S, FloatRegisterImpl::D, F2, F16 ); | |
537 __ ftof( FloatRegisterImpl::S, FloatRegisterImpl::D, F18, F18 ); | |
538 | |
539 // use add to put 20..32 in F20..F32 | |
540 for (i = 20; i < 32; i += 2) { | |
541 __ fadd( FloatRegisterImpl::D, F16, as_FloatRegister(i-2), as_FloatRegister(i)); | |
542 } | |
543 | |
544 // put 0..7 in i's, 8..15 in l's, 16..23 in o's, 24..31 in g's | |
545 for ( i = 0; i < 8; ++i ) { | |
546 if (i < 6) { | |
547 __ set( i, as_iRegister(i)); | |
548 __ set(16 + i, as_oRegister(i)); | |
549 __ set(24 + i, as_gRegister(i)); | |
550 } | |
551 __ set( 8 + i, as_lRegister(i)); | |
552 } | |
553 | |
554 __ stop("testing stop"); | |
555 | |
556 | |
557 __ ret(); | |
558 __ delayed()->restore(); | |
559 | |
560 return start; | |
561 } | |
562 | |
563 | |
564 address generate_stop_subroutine() { | |
565 StubCodeMark mark(this, "StubRoutines", "stop_subroutine"); | |
566 address start = __ pc(); | |
567 | |
568 __ stop_subroutine(); | |
569 | |
570 return start; | |
571 } | |
572 | |
573 address generate_flush_callers_register_windows() { | |
574 StubCodeMark mark(this, "StubRoutines", "flush_callers_register_windows"); | |
575 address start = __ pc(); | |
576 | |
577 __ flush_windows(); | |
578 __ retl(false); | |
579 __ delayed()->add( FP, STACK_BIAS, O0 ); | |
580 // The returned value must be a stack pointer whose register save area | |
581 // is flushed, and will stay flushed while the caller executes. | |
582 | |
583 return start; | |
584 } | |
585 | |
586 // Helper functions for v8 atomic operations. | |
587 // | |
588 void get_v8_oop_lock_ptr(Register lock_ptr_reg, Register mark_oop_reg, Register scratch_reg) { | |
589 if (mark_oop_reg == noreg) { | |
590 address lock_ptr = (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(); | |
591 __ set((intptr_t)lock_ptr, lock_ptr_reg); | |
592 } else { | |
593 assert(scratch_reg != noreg, "just checking"); | |
594 address lock_ptr = (address)StubRoutines::Sparc::_v8_oop_lock_cache; | |
595 __ set((intptr_t)lock_ptr, lock_ptr_reg); | |
596 __ and3(mark_oop_reg, StubRoutines::Sparc::v8_oop_lock_mask_in_place, scratch_reg); | |
597 __ add(lock_ptr_reg, scratch_reg, lock_ptr_reg); | |
598 } | |
599 } | |
600 | |
601 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) { | |
602 | |
603 get_v8_oop_lock_ptr(lock_ptr_reg, mark_oop_reg, scratch_reg); | |
604 __ set(StubRoutines::Sparc::locked, lock_reg); | |
605 // Initialize yield counter | |
606 __ mov(G0,yield_reg); | |
607 | |
608 __ BIND(retry); | |
609 __ cmp(yield_reg, V8AtomicOperationUnderLockSpinCount); | |
610 __ br(Assembler::less, false, Assembler::pt, dontyield); | |
611 __ delayed()->nop(); | |
612 | |
613 // This code can only be called from inside the VM, this | |
614 // stub is only invoked from Atomic::add(). We do not | |
615 // want to use call_VM, because _last_java_sp and such | |
616 // must already be set. | |
617 // | |
618 // Save the regs and make space for a C call | |
619 __ save(SP, -96, SP); | |
620 __ save_all_globals_into_locals(); | |
621 BLOCK_COMMENT("call os::naked_sleep"); | |
622 __ call(CAST_FROM_FN_PTR(address, os::naked_sleep)); | |
623 __ delayed()->nop(); | |
624 __ restore_globals_from_locals(); | |
625 __ restore(); | |
626 // reset the counter | |
627 __ mov(G0,yield_reg); | |
628 | |
629 __ BIND(dontyield); | |
630 | |
631 // try to get lock | |
632 __ swap(lock_ptr_reg, 0, lock_reg); | |
633 | |
634 // did we get the lock? | |
635 __ cmp(lock_reg, StubRoutines::Sparc::unlocked); | |
636 __ br(Assembler::notEqual, true, Assembler::pn, retry); | |
637 __ delayed()->add(yield_reg,1,yield_reg); | |
638 | |
639 // yes, got lock. do the operation here. | |
640 } | |
641 | |
642 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) { | |
643 __ st(lock_reg, lock_ptr_reg, 0); // unlock | |
644 } | |
645 | |
646 // Support for jint Atomic::xchg(jint exchange_value, volatile jint* dest). | |
647 // | |
648 // Arguments : | |
649 // | |
650 // exchange_value: O0 | |
651 // dest: O1 | |
652 // | |
653 // Results: | |
654 // | |
655 // O0: the value previously stored in dest | |
656 // | |
657 address generate_atomic_xchg() { | |
658 StubCodeMark mark(this, "StubRoutines", "atomic_xchg"); | |
659 address start = __ pc(); | |
660 | |
661 if (UseCASForSwap) { | |
662 // Use CAS instead of swap, just in case the MP hardware | |
663 // prefers to work with just one kind of synch. instruction. | |
664 Label retry; | |
665 __ BIND(retry); | |
666 __ mov(O0, O3); // scratch copy of exchange value | |
667 __ ld(O1, 0, O2); // observe the previous value | |
668 // try to replace O2 with O3 | |
669 __ cas_under_lock(O1, O2, O3, | |
670 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(),false); | |
671 __ cmp(O2, O3); | |
672 __ br(Assembler::notEqual, false, Assembler::pn, retry); | |
673 __ delayed()->nop(); | |
674 | |
675 __ retl(false); | |
676 __ delayed()->mov(O2, O0); // report previous value to caller | |
677 | |
678 } else { | |
679 if (VM_Version::v9_instructions_work()) { | |
680 __ retl(false); | |
681 __ delayed()->swap(O1, 0, O0); | |
682 } else { | |
683 const Register& lock_reg = O2; | |
684 const Register& lock_ptr_reg = O3; | |
685 const Register& yield_reg = O4; | |
686 | |
687 Label retry; | |
688 Label dontyield; | |
689 | |
690 generate_v8_lock_prologue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
691 // got the lock, do the swap | |
692 __ swap(O1, 0, O0); | |
693 | |
694 generate_v8_lock_epilogue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
695 __ retl(false); | |
696 __ delayed()->nop(); | |
697 } | |
698 } | |
699 | |
700 return start; | |
701 } | |
702 | |
703 | |
704 // Support for jint Atomic::cmpxchg(jint exchange_value, volatile jint* dest, jint compare_value) | |
705 // | |
706 // Arguments : | |
707 // | |
708 // exchange_value: O0 | |
709 // dest: O1 | |
710 // compare_value: O2 | |
711 // | |
712 // Results: | |
713 // | |
714 // O0: the value previously stored in dest | |
715 // | |
716 // Overwrites (v8): O3,O4,O5 | |
717 // | |
718 address generate_atomic_cmpxchg() { | |
719 StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg"); | |
720 address start = __ pc(); | |
721 | |
722 // cmpxchg(dest, compare_value, exchange_value) | |
723 __ cas_under_lock(O1, O2, O0, | |
724 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(),false); | |
725 __ retl(false); | |
726 __ delayed()->nop(); | |
727 | |
728 return start; | |
729 } | |
730 | |
731 // Support for jlong Atomic::cmpxchg(jlong exchange_value, volatile jlong *dest, jlong compare_value) | |
732 // | |
733 // Arguments : | |
734 // | |
735 // exchange_value: O1:O0 | |
736 // dest: O2 | |
737 // compare_value: O4:O3 | |
738 // | |
739 // Results: | |
740 // | |
741 // O1:O0: the value previously stored in dest | |
742 // | |
743 // This only works on V9, on V8 we don't generate any | |
744 // code and just return NULL. | |
745 // | |
746 // Overwrites: G1,G2,G3 | |
747 // | |
748 address generate_atomic_cmpxchg_long() { | |
749 StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg_long"); | |
750 address start = __ pc(); | |
751 | |
752 if (!VM_Version::supports_cx8()) | |
753 return NULL;; | |
754 __ sllx(O0, 32, O0); | |
755 __ srl(O1, 0, O1); | |
756 __ or3(O0,O1,O0); // O0 holds 64-bit value from compare_value | |
757 __ sllx(O3, 32, O3); | |
758 __ srl(O4, 0, O4); | |
759 __ or3(O3,O4,O3); // O3 holds 64-bit value from exchange_value | |
760 __ casx(O2, O3, O0); | |
761 __ srl(O0, 0, O1); // unpacked return value in O1:O0 | |
762 __ retl(false); | |
763 __ delayed()->srlx(O0, 32, O0); | |
764 | |
765 return start; | |
766 } | |
767 | |
768 | |
769 // Support for jint Atomic::add(jint add_value, volatile jint* dest). | |
770 // | |
771 // Arguments : | |
772 // | |
773 // add_value: O0 (e.g., +1 or -1) | |
774 // dest: O1 | |
775 // | |
776 // Results: | |
777 // | |
778 // O0: the new value stored in dest | |
779 // | |
780 // Overwrites (v9): O3 | |
781 // Overwrites (v8): O3,O4,O5 | |
782 // | |
783 address generate_atomic_add() { | |
784 StubCodeMark mark(this, "StubRoutines", "atomic_add"); | |
785 address start = __ pc(); | |
786 __ BIND(_atomic_add_stub); | |
787 | |
788 if (VM_Version::v9_instructions_work()) { | |
789 Label(retry); | |
790 __ BIND(retry); | |
791 | |
792 __ lduw(O1, 0, O2); | |
793 __ add(O0, O2, O3); | |
794 __ cas(O1, O2, O3); | |
795 __ cmp( O2, O3); | |
796 __ br(Assembler::notEqual, false, Assembler::pn, retry); | |
797 __ delayed()->nop(); | |
798 __ retl(false); | |
799 __ delayed()->add(O0, O2, O0); // note that cas made O2==O3 | |
800 } else { | |
801 const Register& lock_reg = O2; | |
802 const Register& lock_ptr_reg = O3; | |
803 const Register& value_reg = O4; | |
804 const Register& yield_reg = O5; | |
805 | |
806 Label(retry); | |
807 Label(dontyield); | |
808 | |
809 generate_v8_lock_prologue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
810 // got lock, do the increment | |
811 __ ld(O1, 0, value_reg); | |
812 __ add(O0, value_reg, value_reg); | |
813 __ st(value_reg, O1, 0); | |
814 | |
815 // %%% only for RMO and PSO | |
816 __ membar(Assembler::StoreStore); | |
817 | |
818 generate_v8_lock_epilogue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
819 | |
820 __ retl(false); | |
821 __ delayed()->mov(value_reg, O0); | |
822 } | |
823 | |
824 return start; | |
825 } | |
826 Label _atomic_add_stub; // called from other stubs | |
827 | |
828 | |
829 //------------------------------------------------------------------------------------------------------------------------ | |
830 // The following routine generates a subroutine to throw an asynchronous | |
831 // UnknownError when an unsafe access gets a fault that could not be | |
832 // reasonably prevented by the programmer. (Example: SIGBUS/OBJERR.) | |
833 // | |
834 // Arguments : | |
835 // | |
836 // trapping PC: O7 | |
837 // | |
838 // Results: | |
839 // posts an asynchronous exception, skips the trapping instruction | |
840 // | |
841 | |
842 address generate_handler_for_unsafe_access() { | |
843 StubCodeMark mark(this, "StubRoutines", "handler_for_unsafe_access"); | |
844 address start = __ pc(); | |
845 | |
846 const int preserve_register_words = (64 * 2); | |
727 | 847 Address preserve_addr(FP, (-preserve_register_words * wordSize) + STACK_BIAS); |
0 | 848 |
849 Register Lthread = L7_thread_cache; | |
850 int i; | |
851 | |
852 __ save_frame(0); | |
853 __ mov(G1, L1); | |
854 __ mov(G2, L2); | |
855 __ mov(G3, L3); | |
856 __ mov(G4, L4); | |
857 __ mov(G5, L5); | |
858 for (i = 0; i < (VM_Version::v9_instructions_work() ? 64 : 32); i += 2) { | |
859 __ stf(FloatRegisterImpl::D, as_FloatRegister(i), preserve_addr, i * wordSize); | |
860 } | |
861 | |
862 address entry_point = CAST_FROM_FN_PTR(address, handle_unsafe_access); | |
863 BLOCK_COMMENT("call handle_unsafe_access"); | |
864 __ call(entry_point, relocInfo::runtime_call_type); | |
865 __ delayed()->nop(); | |
866 | |
867 __ mov(L1, G1); | |
868 __ mov(L2, G2); | |
869 __ mov(L3, G3); | |
870 __ mov(L4, G4); | |
871 __ mov(L5, G5); | |
872 for (i = 0; i < (VM_Version::v9_instructions_work() ? 64 : 32); i += 2) { | |
873 __ ldf(FloatRegisterImpl::D, preserve_addr, as_FloatRegister(i), i * wordSize); | |
874 } | |
875 | |
876 __ verify_thread(); | |
877 | |
878 __ jmp(O0, 0); | |
879 __ delayed()->restore(); | |
880 | |
881 return start; | |
882 } | |
883 | |
884 | |
885 // Support for uint StubRoutine::Sparc::partial_subtype_check( Klass sub, Klass super ); | |
886 // Arguments : | |
887 // | |
888 // ret : O0, returned | |
889 // icc/xcc: set as O0 (depending on wordSize) | |
890 // sub : O1, argument, not changed | |
891 // super: O2, argument, not changed | |
892 // raddr: O7, blown by call | |
893 address generate_partial_subtype_check() { | |
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894 __ align(CodeEntryAlignment); |
0 | 895 StubCodeMark mark(this, "StubRoutines", "partial_subtype_check"); |
896 address start = __ pc(); | |
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897 Label miss; |
0 | 898 |
899 #if defined(COMPILER2) && !defined(_LP64) | |
900 // Do not use a 'save' because it blows the 64-bit O registers. | |
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901 __ add(SP,-4*wordSize,SP); // Make space for 4 temps (stack must be 2 words aligned) |
0 | 902 __ st_ptr(L0,SP,(frame::register_save_words+0)*wordSize); |
903 __ st_ptr(L1,SP,(frame::register_save_words+1)*wordSize); | |
904 __ st_ptr(L2,SP,(frame::register_save_words+2)*wordSize); | |
905 __ st_ptr(L3,SP,(frame::register_save_words+3)*wordSize); | |
906 Register Rret = O0; | |
907 Register Rsub = O1; | |
908 Register Rsuper = O2; | |
909 #else | |
910 __ save_frame(0); | |
911 Register Rret = I0; | |
912 Register Rsub = I1; | |
913 Register Rsuper = I2; | |
914 #endif | |
915 | |
916 Register L0_ary_len = L0; | |
917 Register L1_ary_ptr = L1; | |
918 Register L2_super = L2; | |
919 Register L3_index = L3; | |
920 | |
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921 __ check_klass_subtype_slow_path(Rsub, Rsuper, |
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922 L0, L1, L2, L3, |
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923 NULL, &miss); |
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924 |
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925 // Match falls through here. |
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926 __ addcc(G0,0,Rret); // set Z flags, Z result |
0 | 927 |
928 #if defined(COMPILER2) && !defined(_LP64) | |
929 __ ld_ptr(SP,(frame::register_save_words+0)*wordSize,L0); | |
930 __ ld_ptr(SP,(frame::register_save_words+1)*wordSize,L1); | |
931 __ ld_ptr(SP,(frame::register_save_words+2)*wordSize,L2); | |
932 __ ld_ptr(SP,(frame::register_save_words+3)*wordSize,L3); | |
933 __ retl(); // Result in Rret is zero; flags set to Z | |
934 __ delayed()->add(SP,4*wordSize,SP); | |
935 #else | |
936 __ ret(); // Result in Rret is zero; flags set to Z | |
937 __ delayed()->restore(); | |
938 #endif | |
939 | |
940 __ BIND(miss); | |
941 __ addcc(G0,1,Rret); // set NZ flags, NZ result | |
942 | |
943 #if defined(COMPILER2) && !defined(_LP64) | |
944 __ ld_ptr(SP,(frame::register_save_words+0)*wordSize,L0); | |
945 __ ld_ptr(SP,(frame::register_save_words+1)*wordSize,L1); | |
946 __ ld_ptr(SP,(frame::register_save_words+2)*wordSize,L2); | |
947 __ ld_ptr(SP,(frame::register_save_words+3)*wordSize,L3); | |
948 __ retl(); // Result in Rret is != 0; flags set to NZ | |
949 __ delayed()->add(SP,4*wordSize,SP); | |
950 #else | |
951 __ ret(); // Result in Rret is != 0; flags set to NZ | |
952 __ delayed()->restore(); | |
953 #endif | |
954 | |
955 return start; | |
956 } | |
957 | |
958 | |
959 // Called from MacroAssembler::verify_oop | |
960 // | |
961 address generate_verify_oop_subroutine() { | |
962 StubCodeMark mark(this, "StubRoutines", "verify_oop_stub"); | |
963 | |
964 address start = __ pc(); | |
965 | |
966 __ verify_oop_subroutine(); | |
967 | |
968 return start; | |
969 } | |
970 | |
971 | |
972 // | |
973 // Verify that a register contains clean 32-bits positive value | |
974 // (high 32-bits are 0) so it could be used in 64-bits shifts (sllx, srax). | |
975 // | |
976 // Input: | |
977 // Rint - 32-bits value | |
978 // Rtmp - scratch | |
979 // | |
980 void assert_clean_int(Register Rint, Register Rtmp) { | |
981 #if defined(ASSERT) && defined(_LP64) | |
982 __ signx(Rint, Rtmp); | |
983 __ cmp(Rint, Rtmp); | |
984 __ breakpoint_trap(Assembler::notEqual, Assembler::xcc); | |
985 #endif | |
986 } | |
987 | |
988 // | |
989 // Generate overlap test for array copy stubs | |
990 // | |
991 // Input: | |
992 // O0 - array1 | |
993 // O1 - array2 | |
994 // O2 - element count | |
995 // | |
996 // Kills temps: O3, O4 | |
997 // | |
998 void array_overlap_test(address no_overlap_target, int log2_elem_size) { | |
999 assert(no_overlap_target != NULL, "must be generated"); | |
1000 array_overlap_test(no_overlap_target, NULL, log2_elem_size); | |
1001 } | |
1002 void array_overlap_test(Label& L_no_overlap, int log2_elem_size) { | |
1003 array_overlap_test(NULL, &L_no_overlap, log2_elem_size); | |
1004 } | |
1005 void array_overlap_test(address no_overlap_target, Label* NOLp, int log2_elem_size) { | |
1006 const Register from = O0; | |
1007 const Register to = O1; | |
1008 const Register count = O2; | |
1009 const Register to_from = O3; // to - from | |
1010 const Register byte_count = O4; // count << log2_elem_size | |
1011 | |
1012 __ subcc(to, from, to_from); | |
1013 __ sll_ptr(count, log2_elem_size, byte_count); | |
1014 if (NOLp == NULL) | |
1015 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, no_overlap_target); | |
1016 else | |
1017 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, (*NOLp)); | |
1018 __ delayed()->cmp(to_from, byte_count); | |
1019 if (NOLp == NULL) | |
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1020 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, no_overlap_target); |
0 | 1021 else |
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1022 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, (*NOLp)); |
0 | 1023 __ delayed()->nop(); |
1024 } | |
1025 | |
1026 // | |
1027 // Generate pre-write barrier for array. | |
1028 // | |
1029 // Input: | |
1030 // addr - register containing starting address | |
1031 // count - register containing element count | |
1032 // tmp - scratch register | |
1033 // | |
1034 // The input registers are overwritten. | |
1035 // | |
2324 | 1036 void gen_write_ref_array_pre_barrier(Register addr, Register count, bool dest_uninitialized) { |
0 | 1037 BarrierSet* bs = Universe::heap()->barrier_set(); |
2324 | 1038 switch (bs->kind()) { |
1039 case BarrierSet::G1SATBCT: | |
1040 case BarrierSet::G1SATBCTLogging: | |
1041 // With G1, don't generate the call if we statically know that the target in uninitialized | |
1042 if (!dest_uninitialized) { | |
1043 __ save_frame(0); | |
1044 // Save the necessary global regs... will be used after. | |
1045 if (addr->is_global()) { | |
1046 __ mov(addr, L0); | |
1047 } | |
1048 if (count->is_global()) { | |
1049 __ mov(count, L1); | |
1050 } | |
1051 __ mov(addr->after_save(), O0); | |
1052 // Get the count into O1 | |
1053 __ call(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_pre)); | |
1054 __ delayed()->mov(count->after_save(), O1); | |
1055 if (addr->is_global()) { | |
1056 __ mov(L0, addr); | |
1057 } | |
1058 if (count->is_global()) { | |
1059 __ mov(L1, count); | |
1060 } | |
1061 __ restore(); | |
1062 } | |
1063 break; | |
1064 case BarrierSet::CardTableModRef: | |
1065 case BarrierSet::CardTableExtension: | |
1066 case BarrierSet::ModRef: | |
1067 break; | |
1068 default: | |
1069 ShouldNotReachHere(); | |
0 | 1070 } |
1071 } | |
1072 // | |
1073 // Generate post-write barrier for array. | |
1074 // | |
1075 // Input: | |
1076 // addr - register containing starting address | |
1077 // count - register containing element count | |
1078 // tmp - scratch register | |
1079 // | |
1080 // The input registers are overwritten. | |
1081 // | |
1082 void gen_write_ref_array_post_barrier(Register addr, Register count, | |
2324 | 1083 Register tmp) { |
0 | 1084 BarrierSet* bs = Universe::heap()->barrier_set(); |
1085 | |
1086 switch (bs->kind()) { | |
1087 case BarrierSet::G1SATBCT: | |
1088 case BarrierSet::G1SATBCTLogging: | |
1089 { | |
1090 // Get some new fresh output registers. | |
1091 __ save_frame(0); | |
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1092 __ mov(addr->after_save(), O0); |
0 | 1093 __ call(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_post)); |
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1094 __ delayed()->mov(count->after_save(), O1); |
0 | 1095 __ restore(); |
1096 } | |
1097 break; | |
1098 case BarrierSet::CardTableModRef: | |
1099 case BarrierSet::CardTableExtension: | |
1100 { | |
1101 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | |
1102 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); | |
1103 assert_different_registers(addr, count, tmp); | |
1104 | |
1105 Label L_loop; | |
1106 | |
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1107 __ sll_ptr(count, LogBytesPerHeapOop, count); |
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1108 __ sub(count, BytesPerHeapOop, count); |
0 | 1109 __ add(count, addr, count); |
1110 // Use two shifts to clear out those low order two bits! (Cannot opt. into 1.) | |
1111 __ srl_ptr(addr, CardTableModRefBS::card_shift, addr); | |
1112 __ srl_ptr(count, CardTableModRefBS::card_shift, count); | |
1113 __ sub(count, addr, count); | |
727 | 1114 AddressLiteral rs(ct->byte_map_base); |
1115 __ set(rs, tmp); | |
0 | 1116 __ BIND(L_loop); |
727 | 1117 __ stb(G0, tmp, addr); |
0 | 1118 __ subcc(count, 1, count); |
1119 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
1120 __ delayed()->add(addr, 1, addr); | |
727 | 1121 } |
0 | 1122 break; |
1123 case BarrierSet::ModRef: | |
1124 break; | |
727 | 1125 default: |
0 | 1126 ShouldNotReachHere(); |
1127 } | |
1128 } | |
1129 | |
1130 | |
1131 // Copy big chunks forward with shift | |
1132 // | |
1133 // Inputs: | |
1134 // from - source arrays | |
1135 // to - destination array aligned to 8-bytes | |
1136 // count - elements count to copy >= the count equivalent to 16 bytes | |
1137 // count_dec - elements count's decrement equivalent to 16 bytes | |
1138 // L_copy_bytes - copy exit label | |
1139 // | |
1140 void copy_16_bytes_forward_with_shift(Register from, Register to, | |
1141 Register count, int count_dec, Label& L_copy_bytes) { | |
1142 Label L_loop, L_aligned_copy, L_copy_last_bytes; | |
1143 | |
1144 // if both arrays have the same alignment mod 8, do 8 bytes aligned copy | |
1145 __ andcc(from, 7, G1); // misaligned bytes | |
1146 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
1147 __ delayed()->nop(); | |
1148 | |
1149 const Register left_shift = G1; // left shift bit counter | |
1150 const Register right_shift = G5; // right shift bit counter | |
1151 | |
1152 __ sll(G1, LogBitsPerByte, left_shift); | |
1153 __ mov(64, right_shift); | |
1154 __ sub(right_shift, left_shift, right_shift); | |
1155 | |
1156 // | |
1157 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
1158 // to form 2 aligned 8-bytes chunks to store. | |
1159 // | |
1160 __ deccc(count, count_dec); // Pre-decrement 'count' | |
1161 __ andn(from, 7, from); // Align address | |
1162 __ ldx(from, 0, O3); | |
1163 __ inc(from, 8); | |
1365 | 1164 __ align(OptoLoopAlignment); |
0 | 1165 __ BIND(L_loop); |
1166 __ ldx(from, 0, O4); | |
1167 __ deccc(count, count_dec); // Can we do next iteration after this one? | |
1168 __ ldx(from, 8, G4); | |
1169 __ inc(to, 16); | |
1170 __ inc(from, 16); | |
1171 __ sllx(O3, left_shift, O3); | |
1172 __ srlx(O4, right_shift, G3); | |
1173 __ bset(G3, O3); | |
1174 __ stx(O3, to, -16); | |
1175 __ sllx(O4, left_shift, O4); | |
1176 __ srlx(G4, right_shift, G3); | |
1177 __ bset(G3, O4); | |
1178 __ stx(O4, to, -8); | |
1179 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
1180 __ delayed()->mov(G4, O3); | |
1181 | |
1182 __ inccc(count, count_dec>>1 ); // + 8 bytes | |
1183 __ brx(Assembler::negative, true, Assembler::pn, L_copy_last_bytes); | |
1184 __ delayed()->inc(count, count_dec>>1); // restore 'count' | |
1185 | |
1186 // copy 8 bytes, part of them already loaded in O3 | |
1187 __ ldx(from, 0, O4); | |
1188 __ inc(to, 8); | |
1189 __ inc(from, 8); | |
1190 __ sllx(O3, left_shift, O3); | |
1191 __ srlx(O4, right_shift, G3); | |
1192 __ bset(O3, G3); | |
1193 __ stx(G3, to, -8); | |
1194 | |
1195 __ BIND(L_copy_last_bytes); | |
1196 __ srl(right_shift, LogBitsPerByte, right_shift); // misaligned bytes | |
1197 __ br(Assembler::always, false, Assembler::pt, L_copy_bytes); | |
1198 __ delayed()->sub(from, right_shift, from); // restore address | |
1199 | |
1200 __ BIND(L_aligned_copy); | |
1201 } | |
1202 | |
1203 // Copy big chunks backward with shift | |
1204 // | |
1205 // Inputs: | |
1206 // end_from - source arrays end address | |
1207 // end_to - destination array end address aligned to 8-bytes | |
1208 // count - elements count to copy >= the count equivalent to 16 bytes | |
1209 // count_dec - elements count's decrement equivalent to 16 bytes | |
1210 // L_aligned_copy - aligned copy exit label | |
1211 // L_copy_bytes - copy exit label | |
1212 // | |
1213 void copy_16_bytes_backward_with_shift(Register end_from, Register end_to, | |
1214 Register count, int count_dec, | |
1215 Label& L_aligned_copy, Label& L_copy_bytes) { | |
1216 Label L_loop, L_copy_last_bytes; | |
1217 | |
1218 // if both arrays have the same alignment mod 8, do 8 bytes aligned copy | |
1219 __ andcc(end_from, 7, G1); // misaligned bytes | |
1220 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
1221 __ delayed()->deccc(count, count_dec); // Pre-decrement 'count' | |
1222 | |
1223 const Register left_shift = G1; // left shift bit counter | |
1224 const Register right_shift = G5; // right shift bit counter | |
1225 | |
1226 __ sll(G1, LogBitsPerByte, left_shift); | |
1227 __ mov(64, right_shift); | |
1228 __ sub(right_shift, left_shift, right_shift); | |
1229 | |
1230 // | |
1231 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
1232 // to form 2 aligned 8-bytes chunks to store. | |
1233 // | |
1234 __ andn(end_from, 7, end_from); // Align address | |
1235 __ ldx(end_from, 0, O3); | |
1365 | 1236 __ align(OptoLoopAlignment); |
0 | 1237 __ BIND(L_loop); |
1238 __ ldx(end_from, -8, O4); | |
1239 __ deccc(count, count_dec); // Can we do next iteration after this one? | |
1240 __ ldx(end_from, -16, G4); | |
1241 __ dec(end_to, 16); | |
1242 __ dec(end_from, 16); | |
1243 __ srlx(O3, right_shift, O3); | |
1244 __ sllx(O4, left_shift, G3); | |
1245 __ bset(G3, O3); | |
1246 __ stx(O3, end_to, 8); | |
1247 __ srlx(O4, right_shift, O4); | |
1248 __ sllx(G4, left_shift, G3); | |
1249 __ bset(G3, O4); | |
1250 __ stx(O4, end_to, 0); | |
1251 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
1252 __ delayed()->mov(G4, O3); | |
1253 | |
1254 __ inccc(count, count_dec>>1 ); // + 8 bytes | |
1255 __ brx(Assembler::negative, true, Assembler::pn, L_copy_last_bytes); | |
1256 __ delayed()->inc(count, count_dec>>1); // restore 'count' | |
1257 | |
1258 // copy 8 bytes, part of them already loaded in O3 | |
1259 __ ldx(end_from, -8, O4); | |
1260 __ dec(end_to, 8); | |
1261 __ dec(end_from, 8); | |
1262 __ srlx(O3, right_shift, O3); | |
1263 __ sllx(O4, left_shift, G3); | |
1264 __ bset(O3, G3); | |
1265 __ stx(G3, end_to, 0); | |
1266 | |
1267 __ BIND(L_copy_last_bytes); | |
1268 __ srl(left_shift, LogBitsPerByte, left_shift); // misaligned bytes | |
1269 __ br(Assembler::always, false, Assembler::pt, L_copy_bytes); | |
1270 __ delayed()->add(end_from, left_shift, end_from); // restore address | |
1271 } | |
1272 | |
1273 // | |
1274 // Generate stub for disjoint byte copy. If "aligned" is true, the | |
1275 // "from" and "to" addresses are assumed to be heapword aligned. | |
1276 // | |
1277 // Arguments for generated stub: | |
1278 // from: O0 | |
1279 // to: O1 | |
1280 // count: O2 treated as signed | |
1281 // | |
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1282 address generate_disjoint_byte_copy(bool aligned, address *entry, const char *name) { |
0 | 1283 __ align(CodeEntryAlignment); |
1284 StubCodeMark mark(this, "StubRoutines", name); | |
1285 address start = __ pc(); | |
1286 | |
1287 Label L_skip_alignment, L_align; | |
1288 Label L_copy_byte, L_copy_byte_loop, L_exit; | |
1289 | |
1290 const Register from = O0; // source array address | |
1291 const Register to = O1; // destination array address | |
1292 const Register count = O2; // elements count | |
1293 const Register offset = O5; // offset from start of arrays | |
1294 // O3, O4, G3, G4 are used as temp registers | |
1295 | |
1296 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1297 | |
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1298 if (entry != NULL) { |
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1299 *entry = __ pc(); |
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1300 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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1301 BLOCK_COMMENT("Entry:"); |
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1302 } |
0 | 1303 |
1304 // for short arrays, just do single element copy | |
1305 __ cmp(count, 23); // 16 + 7 | |
1306 __ brx(Assembler::less, false, Assembler::pn, L_copy_byte); | |
1307 __ delayed()->mov(G0, offset); | |
1308 | |
1309 if (aligned) { | |
1310 // 'aligned' == true when it is known statically during compilation | |
1311 // of this arraycopy call site that both 'from' and 'to' addresses | |
1312 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
1313 // | |
1314 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
1315 // and 8 bytes - in 64-bits VM. So we do it only for 32-bits VM | |
1316 // | |
1317 #ifndef _LP64 | |
1318 // copy a 4-bytes word if necessary to align 'to' to 8 bytes | |
1319 __ andcc(to, 7, G0); | |
1320 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment); | |
1321 __ delayed()->ld(from, 0, O3); | |
1322 __ inc(from, 4); | |
1323 __ inc(to, 4); | |
1324 __ dec(count, 4); | |
1325 __ st(O3, to, -4); | |
1326 __ BIND(L_skip_alignment); | |
1327 #endif | |
1328 } else { | |
1329 // copy bytes to align 'to' on 8 byte boundary | |
1330 __ andcc(to, 7, G1); // misaligned bytes | |
1331 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1332 __ delayed()->neg(G1); | |
1333 __ inc(G1, 8); // bytes need to copy to next 8-bytes alignment | |
1334 __ sub(count, G1, count); | |
1335 __ BIND(L_align); | |
1336 __ ldub(from, 0, O3); | |
1337 __ deccc(G1); | |
1338 __ inc(from); | |
1339 __ stb(O3, to, 0); | |
1340 __ br(Assembler::notZero, false, Assembler::pt, L_align); | |
1341 __ delayed()->inc(to); | |
1342 __ BIND(L_skip_alignment); | |
1343 } | |
1344 #ifdef _LP64 | |
1345 if (!aligned) | |
1346 #endif | |
1347 { | |
1348 // Copy with shift 16 bytes per iteration if arrays do not have | |
1349 // the same alignment mod 8, otherwise fall through to the next | |
1350 // code for aligned copy. | |
1351 // The compare above (count >= 23) guarantes 'count' >= 16 bytes. | |
1352 // Also jump over aligned copy after the copy with shift completed. | |
1353 | |
1354 copy_16_bytes_forward_with_shift(from, to, count, 16, L_copy_byte); | |
1355 } | |
1356 | |
1357 // Both array are 8 bytes aligned, copy 16 bytes at a time | |
1358 __ and3(count, 7, G4); // Save count | |
1359 __ srl(count, 3, count); | |
1360 generate_disjoint_long_copy_core(aligned); | |
1361 __ mov(G4, count); // Restore count | |
1362 | |
1363 // copy tailing bytes | |
1364 __ BIND(L_copy_byte); | |
1365 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
1366 __ delayed()->nop(); | |
1365 | 1367 __ align(OptoLoopAlignment); |
0 | 1368 __ BIND(L_copy_byte_loop); |
1369 __ ldub(from, offset, O3); | |
1370 __ deccc(count); | |
1371 __ stb(O3, to, offset); | |
1372 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_byte_loop); | |
1373 __ delayed()->inc(offset); | |
1374 | |
1375 __ BIND(L_exit); | |
1376 // O3, O4 are used as temp registers | |
1377 inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr, O3, O4); | |
1378 __ retl(); | |
1379 __ delayed()->mov(G0, O0); // return 0 | |
1380 return start; | |
1381 } | |
1382 | |
1383 // | |
1384 // Generate stub for conjoint byte copy. If "aligned" is true, the | |
1385 // "from" and "to" addresses are assumed to be heapword aligned. | |
1386 // | |
1387 // Arguments for generated stub: | |
1388 // from: O0 | |
1389 // to: O1 | |
1390 // count: O2 treated as signed | |
1391 // | |
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1392 address generate_conjoint_byte_copy(bool aligned, address nooverlap_target, |
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1393 address *entry, const char *name) { |
0 | 1394 // Do reverse copy. |
1395 | |
1396 __ align(CodeEntryAlignment); | |
1397 StubCodeMark mark(this, "StubRoutines", name); | |
1398 address start = __ pc(); | |
1399 | |
1400 Label L_skip_alignment, L_align, L_aligned_copy; | |
1401 Label L_copy_byte, L_copy_byte_loop, L_exit; | |
1402 | |
1403 const Register from = O0; // source array address | |
1404 const Register to = O1; // destination array address | |
1405 const Register count = O2; // elements count | |
1406 const Register end_from = from; // source array end address | |
1407 const Register end_to = to; // destination array end address | |
1408 | |
1409 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1410 | |
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1411 if (entry != NULL) { |
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1412 *entry = __ pc(); |
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1413 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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1414 BLOCK_COMMENT("Entry:"); |
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1415 } |
0 | 1416 |
1417 array_overlap_test(nooverlap_target, 0); | |
1418 | |
1419 __ add(to, count, end_to); // offset after last copied element | |
1420 | |
1421 // for short arrays, just do single element copy | |
1422 __ cmp(count, 23); // 16 + 7 | |
1423 __ brx(Assembler::less, false, Assembler::pn, L_copy_byte); | |
1424 __ delayed()->add(from, count, end_from); | |
1425 | |
1426 { | |
1427 // Align end of arrays since they could be not aligned even | |
1428 // when arrays itself are aligned. | |
1429 | |
1430 // copy bytes to align 'end_to' on 8 byte boundary | |
1431 __ andcc(end_to, 7, G1); // misaligned bytes | |
1432 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1433 __ delayed()->nop(); | |
1434 __ sub(count, G1, count); | |
1435 __ BIND(L_align); | |
1436 __ dec(end_from); | |
1437 __ dec(end_to); | |
1438 __ ldub(end_from, 0, O3); | |
1439 __ deccc(G1); | |
1440 __ brx(Assembler::notZero, false, Assembler::pt, L_align); | |
1441 __ delayed()->stb(O3, end_to, 0); | |
1442 __ BIND(L_skip_alignment); | |
1443 } | |
1444 #ifdef _LP64 | |
1445 if (aligned) { | |
1446 // Both arrays are aligned to 8-bytes in 64-bits VM. | |
1447 // The 'count' is decremented in copy_16_bytes_backward_with_shift() | |
1448 // in unaligned case. | |
1449 __ dec(count, 16); | |
1450 } else | |
1451 #endif | |
1452 { | |
1453 // Copy with shift 16 bytes per iteration if arrays do not have | |
1454 // the same alignment mod 8, otherwise jump to the next | |
1455 // code for aligned copy (and substracting 16 from 'count' before jump). | |
1456 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
1457 // Also jump over aligned copy after the copy with shift completed. | |
1458 | |
1459 copy_16_bytes_backward_with_shift(end_from, end_to, count, 16, | |
1460 L_aligned_copy, L_copy_byte); | |
1461 } | |
1462 // copy 4 elements (16 bytes) at a time | |
1365 | 1463 __ align(OptoLoopAlignment); |
0 | 1464 __ BIND(L_aligned_copy); |
1465 __ dec(end_from, 16); | |
1466 __ ldx(end_from, 8, O3); | |
1467 __ ldx(end_from, 0, O4); | |
1468 __ dec(end_to, 16); | |
1469 __ deccc(count, 16); | |
1470 __ stx(O3, end_to, 8); | |
1471 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
1472 __ delayed()->stx(O4, end_to, 0); | |
1473 __ inc(count, 16); | |
1474 | |
1475 // copy 1 element (2 bytes) at a time | |
1476 __ BIND(L_copy_byte); | |
1477 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
1478 __ delayed()->nop(); | |
1365 | 1479 __ align(OptoLoopAlignment); |
0 | 1480 __ BIND(L_copy_byte_loop); |
1481 __ dec(end_from); | |
1482 __ dec(end_to); | |
1483 __ ldub(end_from, 0, O4); | |
1484 __ deccc(count); | |
1485 __ brx(Assembler::greater, false, Assembler::pt, L_copy_byte_loop); | |
1486 __ delayed()->stb(O4, end_to, 0); | |
1487 | |
1488 __ BIND(L_exit); | |
1489 // O3, O4 are used as temp registers | |
1490 inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr, O3, O4); | |
1491 __ retl(); | |
1492 __ delayed()->mov(G0, O0); // return 0 | |
1493 return start; | |
1494 } | |
1495 | |
1496 // | |
1497 // Generate stub for disjoint short copy. If "aligned" is true, the | |
1498 // "from" and "to" addresses are assumed to be heapword aligned. | |
1499 // | |
1500 // Arguments for generated stub: | |
1501 // from: O0 | |
1502 // to: O1 | |
1503 // count: O2 treated as signed | |
1504 // | |
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1505 address generate_disjoint_short_copy(bool aligned, address *entry, const char * name) { |
0 | 1506 __ align(CodeEntryAlignment); |
1507 StubCodeMark mark(this, "StubRoutines", name); | |
1508 address start = __ pc(); | |
1509 | |
1510 Label L_skip_alignment, L_skip_alignment2; | |
1511 Label L_copy_2_bytes, L_copy_2_bytes_loop, L_exit; | |
1512 | |
1513 const Register from = O0; // source array address | |
1514 const Register to = O1; // destination array address | |
1515 const Register count = O2; // elements count | |
1516 const Register offset = O5; // offset from start of arrays | |
1517 // O3, O4, G3, G4 are used as temp registers | |
1518 | |
1519 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1520 | |
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1521 if (entry != NULL) { |
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1522 *entry = __ pc(); |
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1523 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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1524 BLOCK_COMMENT("Entry:"); |
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1525 } |
0 | 1526 |
1527 // for short arrays, just do single element copy | |
1528 __ cmp(count, 11); // 8 + 3 (22 bytes) | |
1529 __ brx(Assembler::less, false, Assembler::pn, L_copy_2_bytes); | |
1530 __ delayed()->mov(G0, offset); | |
1531 | |
1532 if (aligned) { | |
1533 // 'aligned' == true when it is known statically during compilation | |
1534 // of this arraycopy call site that both 'from' and 'to' addresses | |
1535 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
1536 // | |
1537 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
1538 // and 8 bytes - in 64-bits VM. | |
1539 // | |
1540 #ifndef _LP64 | |
1541 // copy a 2-elements word if necessary to align 'to' to 8 bytes | |
1542 __ andcc(to, 7, G0); | |
1543 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1544 __ delayed()->ld(from, 0, O3); | |
1545 __ inc(from, 4); | |
1546 __ inc(to, 4); | |
1547 __ dec(count, 2); | |
1548 __ st(O3, to, -4); | |
1549 __ BIND(L_skip_alignment); | |
1550 #endif | |
1551 } else { | |
1552 // copy 1 element if necessary to align 'to' on an 4 bytes | |
1553 __ andcc(to, 3, G0); | |
1554 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1555 __ delayed()->lduh(from, 0, O3); | |
1556 __ inc(from, 2); | |
1557 __ inc(to, 2); | |
1558 __ dec(count); | |
1559 __ sth(O3, to, -2); | |
1560 __ BIND(L_skip_alignment); | |
1561 | |
1562 // copy 2 elements to align 'to' on an 8 byte boundary | |
1563 __ andcc(to, 7, G0); | |
1564 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment2); | |
1565 __ delayed()->lduh(from, 0, O3); | |
1566 __ dec(count, 2); | |
1567 __ lduh(from, 2, O4); | |
1568 __ inc(from, 4); | |
1569 __ inc(to, 4); | |
1570 __ sth(O3, to, -4); | |
1571 __ sth(O4, to, -2); | |
1572 __ BIND(L_skip_alignment2); | |
1573 } | |
1574 #ifdef _LP64 | |
1575 if (!aligned) | |
1576 #endif | |
1577 { | |
1578 // Copy with shift 16 bytes per iteration if arrays do not have | |
1579 // the same alignment mod 8, otherwise fall through to the next | |
1580 // code for aligned copy. | |
1581 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
1582 // Also jump over aligned copy after the copy with shift completed. | |
1583 | |
1584 copy_16_bytes_forward_with_shift(from, to, count, 8, L_copy_2_bytes); | |
1585 } | |
1586 | |
1587 // Both array are 8 bytes aligned, copy 16 bytes at a time | |
1588 __ and3(count, 3, G4); // Save | |
1589 __ srl(count, 2, count); | |
1590 generate_disjoint_long_copy_core(aligned); | |
1591 __ mov(G4, count); // restore | |
1592 | |
1593 // copy 1 element at a time | |
1594 __ BIND(L_copy_2_bytes); | |
1595 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
1596 __ delayed()->nop(); | |
1365 | 1597 __ align(OptoLoopAlignment); |
0 | 1598 __ BIND(L_copy_2_bytes_loop); |
1599 __ lduh(from, offset, O3); | |
1600 __ deccc(count); | |
1601 __ sth(O3, to, offset); | |
1602 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_2_bytes_loop); | |
1603 __ delayed()->inc(offset, 2); | |
1604 | |
1605 __ BIND(L_exit); | |
1606 // O3, O4 are used as temp registers | |
1607 inc_counter_np(SharedRuntime::_jshort_array_copy_ctr, O3, O4); | |
1608 __ retl(); | |
1609 __ delayed()->mov(G0, O0); // return 0 | |
1610 return start; | |
1611 } | |
1612 | |
1613 // | |
1763 | 1614 // Generate stub for disjoint short fill. If "aligned" is true, the |
1615 // "to" address is assumed to be heapword aligned. | |
1616 // | |
1617 // Arguments for generated stub: | |
1618 // to: O0 | |
1619 // value: O1 | |
1620 // count: O2 treated as signed | |
1621 // | |
1622 address generate_fill(BasicType t, bool aligned, const char* name) { | |
1623 __ align(CodeEntryAlignment); | |
1624 StubCodeMark mark(this, "StubRoutines", name); | |
1625 address start = __ pc(); | |
1626 | |
1627 const Register to = O0; // source array address | |
1628 const Register value = O1; // fill value | |
1629 const Register count = O2; // elements count | |
1630 // O3 is used as a temp register | |
1631 | |
1632 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1633 | |
1634 Label L_exit, L_skip_align1, L_skip_align2, L_fill_byte; | |
1794 | 1635 Label L_fill_2_bytes, L_fill_elements, L_fill_32_bytes; |
1763 | 1636 |
1637 int shift = -1; | |
1638 switch (t) { | |
1639 case T_BYTE: | |
1640 shift = 2; | |
1641 break; | |
1642 case T_SHORT: | |
1643 shift = 1; | |
1644 break; | |
1645 case T_INT: | |
1646 shift = 0; | |
1647 break; | |
1648 default: ShouldNotReachHere(); | |
1649 } | |
1650 | |
1651 BLOCK_COMMENT("Entry:"); | |
1652 | |
1653 if (t == T_BYTE) { | |
1654 // Zero extend value | |
1655 __ and3(value, 0xff, value); | |
1656 __ sllx(value, 8, O3); | |
1657 __ or3(value, O3, value); | |
1658 } | |
1659 if (t == T_SHORT) { | |
1660 // Zero extend value | |
1794 | 1661 __ sllx(value, 48, value); |
1662 __ srlx(value, 48, value); | |
1763 | 1663 } |
1664 if (t == T_BYTE || t == T_SHORT) { | |
1665 __ sllx(value, 16, O3); | |
1666 __ or3(value, O3, value); | |
1667 } | |
1668 | |
1669 __ cmp(count, 2<<shift); // Short arrays (< 8 bytes) fill by element | |
1794 | 1670 __ brx(Assembler::lessUnsigned, false, Assembler::pn, L_fill_elements); // use unsigned cmp |
1671 __ delayed()->andcc(count, 1, G0); | |
1763 | 1672 |
1673 if (!aligned && (t == T_BYTE || t == T_SHORT)) { | |
1674 // align source address at 4 bytes address boundary | |
1675 if (t == T_BYTE) { | |
1676 // One byte misalignment happens only for byte arrays | |
1677 __ andcc(to, 1, G0); | |
1678 __ br(Assembler::zero, false, Assembler::pt, L_skip_align1); | |
1679 __ delayed()->nop(); | |
1680 __ stb(value, to, 0); | |
1681 __ inc(to, 1); | |
1682 __ dec(count, 1); | |
1683 __ BIND(L_skip_align1); | |
1684 } | |
1685 // Two bytes misalignment happens only for byte and short (char) arrays | |
1686 __ andcc(to, 2, G0); | |
1687 __ br(Assembler::zero, false, Assembler::pt, L_skip_align2); | |
1688 __ delayed()->nop(); | |
1689 __ sth(value, to, 0); | |
1690 __ inc(to, 2); | |
1691 __ dec(count, 1 << (shift - 1)); | |
1692 __ BIND(L_skip_align2); | |
1693 } | |
1694 #ifdef _LP64 | |
1695 if (!aligned) { | |
1696 #endif | |
1697 // align to 8 bytes, we know we are 4 byte aligned to start | |
1698 __ andcc(to, 7, G0); | |
1699 __ br(Assembler::zero, false, Assembler::pt, L_fill_32_bytes); | |
1700 __ delayed()->nop(); | |
1701 __ stw(value, to, 0); | |
1702 __ inc(to, 4); | |
1703 __ dec(count, 1 << shift); | |
1704 __ BIND(L_fill_32_bytes); | |
1705 #ifdef _LP64 | |
1706 } | |
1707 #endif | |
1708 | |
1709 if (t == T_INT) { | |
1710 // Zero extend value | |
1711 __ srl(value, 0, value); | |
1712 } | |
1713 if (t == T_BYTE || t == T_SHORT || t == T_INT) { | |
1714 __ sllx(value, 32, O3); | |
1715 __ or3(value, O3, value); | |
1716 } | |
1717 | |
1782 | 1718 Label L_check_fill_8_bytes; |
1719 // Fill 32-byte chunks | |
1720 __ subcc(count, 8 << shift, count); | |
1721 __ brx(Assembler::less, false, Assembler::pt, L_check_fill_8_bytes); | |
1722 __ delayed()->nop(); | |
1723 | |
1794 | 1724 Label L_fill_32_bytes_loop, L_fill_4_bytes; |
1763 | 1725 __ align(16); |
1726 __ BIND(L_fill_32_bytes_loop); | |
1727 | |
1728 __ stx(value, to, 0); | |
1729 __ stx(value, to, 8); | |
1730 __ stx(value, to, 16); | |
1731 __ stx(value, to, 24); | |
1732 | |
1733 __ subcc(count, 8 << shift, count); | |
1734 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_fill_32_bytes_loop); | |
1735 __ delayed()->add(to, 32, to); | |
1736 | |
1737 __ BIND(L_check_fill_8_bytes); | |
1738 __ addcc(count, 8 << shift, count); | |
1739 __ brx(Assembler::zero, false, Assembler::pn, L_exit); | |
1740 __ delayed()->subcc(count, 1 << (shift + 1), count); | |
1741 __ brx(Assembler::less, false, Assembler::pn, L_fill_4_bytes); | |
1742 __ delayed()->andcc(count, 1<<shift, G0); | |
1743 | |
1744 // | |
1745 // length is too short, just fill 8 bytes at a time | |
1746 // | |
1747 Label L_fill_8_bytes_loop; | |
1748 __ BIND(L_fill_8_bytes_loop); | |
1749 __ stx(value, to, 0); | |
1750 __ subcc(count, 1 << (shift + 1), count); | |
1751 __ brx(Assembler::greaterEqual, false, Assembler::pn, L_fill_8_bytes_loop); | |
1752 __ delayed()->add(to, 8, to); | |
1753 | |
1754 // fill trailing 4 bytes | |
1755 __ andcc(count, 1<<shift, G0); // in delay slot of branches | |
1794 | 1756 if (t == T_INT) { |
1757 __ BIND(L_fill_elements); | |
1758 } | |
1763 | 1759 __ BIND(L_fill_4_bytes); |
1760 __ brx(Assembler::zero, false, Assembler::pt, L_fill_2_bytes); | |
1761 if (t == T_BYTE || t == T_SHORT) { | |
1762 __ delayed()->andcc(count, 1<<(shift-1), G0); | |
1763 } else { | |
1764 __ delayed()->nop(); | |
1765 } | |
1766 __ stw(value, to, 0); | |
1767 if (t == T_BYTE || t == T_SHORT) { | |
1768 __ inc(to, 4); | |
1769 // fill trailing 2 bytes | |
1770 __ andcc(count, 1<<(shift-1), G0); // in delay slot of branches | |
1771 __ BIND(L_fill_2_bytes); | |
1772 __ brx(Assembler::zero, false, Assembler::pt, L_fill_byte); | |
1773 __ delayed()->andcc(count, 1, count); | |
1774 __ sth(value, to, 0); | |
1775 if (t == T_BYTE) { | |
1776 __ inc(to, 2); | |
1777 // fill trailing byte | |
1778 __ andcc(count, 1, count); // in delay slot of branches | |
1779 __ BIND(L_fill_byte); | |
1780 __ brx(Assembler::zero, false, Assembler::pt, L_exit); | |
1781 __ delayed()->nop(); | |
1782 __ stb(value, to, 0); | |
1783 } else { | |
1784 __ BIND(L_fill_byte); | |
1785 } | |
1786 } else { | |
1787 __ BIND(L_fill_2_bytes); | |
1788 } | |
1789 __ BIND(L_exit); | |
1790 __ retl(); | |
1794 | 1791 __ delayed()->nop(); |
1792 | |
1793 // Handle copies less than 8 bytes. Int is handled elsewhere. | |
1794 if (t == T_BYTE) { | |
1795 __ BIND(L_fill_elements); | |
1796 Label L_fill_2, L_fill_4; | |
1797 // in delay slot __ andcc(count, 1, G0); | |
1798 __ brx(Assembler::zero, false, Assembler::pt, L_fill_2); | |
1799 __ delayed()->andcc(count, 2, G0); | |
1800 __ stb(value, to, 0); | |
1801 __ inc(to, 1); | |
1802 __ BIND(L_fill_2); | |
1803 __ brx(Assembler::zero, false, Assembler::pt, L_fill_4); | |
1804 __ delayed()->andcc(count, 4, G0); | |
1805 __ stb(value, to, 0); | |
1806 __ stb(value, to, 1); | |
1807 __ inc(to, 2); | |
1808 __ BIND(L_fill_4); | |
1809 __ brx(Assembler::zero, false, Assembler::pt, L_exit); | |
1810 __ delayed()->nop(); | |
1811 __ stb(value, to, 0); | |
1812 __ stb(value, to, 1); | |
1813 __ stb(value, to, 2); | |
1814 __ retl(); | |
1815 __ delayed()->stb(value, to, 3); | |
1816 } | |
1817 | |
1818 if (t == T_SHORT) { | |
1819 Label L_fill_2; | |
1820 __ BIND(L_fill_elements); | |
1821 // in delay slot __ andcc(count, 1, G0); | |
1822 __ brx(Assembler::zero, false, Assembler::pt, L_fill_2); | |
1823 __ delayed()->andcc(count, 2, G0); | |
1824 __ sth(value, to, 0); | |
1825 __ inc(to, 2); | |
1826 __ BIND(L_fill_2); | |
1827 __ brx(Assembler::zero, false, Assembler::pt, L_exit); | |
1828 __ delayed()->nop(); | |
1829 __ sth(value, to, 0); | |
1830 __ retl(); | |
1831 __ delayed()->sth(value, to, 2); | |
1832 } | |
1763 | 1833 return start; |
1834 } | |
1835 | |
1836 // | |
0 | 1837 // Generate stub for conjoint short copy. If "aligned" is true, the |
1838 // "from" and "to" addresses are assumed to be heapword aligned. | |
1839 // | |
1840 // Arguments for generated stub: | |
1841 // from: O0 | |
1842 // to: O1 | |
1843 // count: O2 treated as signed | |
1844 // | |
2313
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1845 address generate_conjoint_short_copy(bool aligned, address nooverlap_target, |
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1846 address *entry, const char *name) { |
0 | 1847 // Do reverse copy. |
1848 | |
1849 __ align(CodeEntryAlignment); | |
1850 StubCodeMark mark(this, "StubRoutines", name); | |
1851 address start = __ pc(); | |
1852 | |
1853 Label L_skip_alignment, L_skip_alignment2, L_aligned_copy; | |
1854 Label L_copy_2_bytes, L_copy_2_bytes_loop, L_exit; | |
1855 | |
1856 const Register from = O0; // source array address | |
1857 const Register to = O1; // destination array address | |
1858 const Register count = O2; // elements count | |
1859 const Register end_from = from; // source array end address | |
1860 const Register end_to = to; // destination array end address | |
1861 | |
1862 const Register byte_count = O3; // bytes count to copy | |
1863 | |
1864 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1865 | |
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1866 if (entry != NULL) { |
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1867 *entry = __ pc(); |
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1868 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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1869 BLOCK_COMMENT("Entry:"); |
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1870 } |
0 | 1871 |
1872 array_overlap_test(nooverlap_target, 1); | |
1873 | |
1874 __ sllx(count, LogBytesPerShort, byte_count); | |
1875 __ add(to, byte_count, end_to); // offset after last copied element | |
1876 | |
1877 // for short arrays, just do single element copy | |
1878 __ cmp(count, 11); // 8 + 3 (22 bytes) | |
1879 __ brx(Assembler::less, false, Assembler::pn, L_copy_2_bytes); | |
1880 __ delayed()->add(from, byte_count, end_from); | |
1881 | |
1882 { | |
1883 // Align end of arrays since they could be not aligned even | |
1884 // when arrays itself are aligned. | |
1885 | |
1886 // copy 1 element if necessary to align 'end_to' on an 4 bytes | |
1887 __ andcc(end_to, 3, G0); | |
1888 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1889 __ delayed()->lduh(end_from, -2, O3); | |
1890 __ dec(end_from, 2); | |
1891 __ dec(end_to, 2); | |
1892 __ dec(count); | |
1893 __ sth(O3, end_to, 0); | |
1894 __ BIND(L_skip_alignment); | |
1895 | |
1896 // copy 2 elements to align 'end_to' on an 8 byte boundary | |
1897 __ andcc(end_to, 7, G0); | |
1898 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment2); | |
1899 __ delayed()->lduh(end_from, -2, O3); | |
1900 __ dec(count, 2); | |
1901 __ lduh(end_from, -4, O4); | |
1902 __ dec(end_from, 4); | |
1903 __ dec(end_to, 4); | |
1904 __ sth(O3, end_to, 2); | |
1905 __ sth(O4, end_to, 0); | |
1906 __ BIND(L_skip_alignment2); | |
1907 } | |
1908 #ifdef _LP64 | |
1909 if (aligned) { | |
1910 // Both arrays are aligned to 8-bytes in 64-bits VM. | |
1911 // The 'count' is decremented in copy_16_bytes_backward_with_shift() | |
1912 // in unaligned case. | |
1913 __ dec(count, 8); | |
1914 } else | |
1915 #endif | |
1916 { | |
1917 // Copy with shift 16 bytes per iteration if arrays do not have | |
1918 // the same alignment mod 8, otherwise jump to the next | |
1919 // code for aligned copy (and substracting 8 from 'count' before jump). | |
1920 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
1921 // Also jump over aligned copy after the copy with shift completed. | |
1922 | |
1923 copy_16_bytes_backward_with_shift(end_from, end_to, count, 8, | |
1924 L_aligned_copy, L_copy_2_bytes); | |
1925 } | |
1926 // copy 4 elements (16 bytes) at a time | |
1365 | 1927 __ align(OptoLoopAlignment); |
0 | 1928 __ BIND(L_aligned_copy); |
1929 __ dec(end_from, 16); | |
1930 __ ldx(end_from, 8, O3); | |
1931 __ ldx(end_from, 0, O4); | |
1932 __ dec(end_to, 16); | |
1933 __ deccc(count, 8); | |
1934 __ stx(O3, end_to, 8); | |
1935 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
1936 __ delayed()->stx(O4, end_to, 0); | |
1937 __ inc(count, 8); | |
1938 | |
1939 // copy 1 element (2 bytes) at a time | |
1940 __ BIND(L_copy_2_bytes); | |
1941 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
1942 __ delayed()->nop(); | |
1943 __ BIND(L_copy_2_bytes_loop); | |
1944 __ dec(end_from, 2); | |
1945 __ dec(end_to, 2); | |
1946 __ lduh(end_from, 0, O4); | |
1947 __ deccc(count); | |
1948 __ brx(Assembler::greater, false, Assembler::pt, L_copy_2_bytes_loop); | |
1949 __ delayed()->sth(O4, end_to, 0); | |
1950 | |
1951 __ BIND(L_exit); | |
1952 // O3, O4 are used as temp registers | |
1953 inc_counter_np(SharedRuntime::_jshort_array_copy_ctr, O3, O4); | |
1954 __ retl(); | |
1955 __ delayed()->mov(G0, O0); // return 0 | |
1956 return start; | |
1957 } | |
1958 | |
1959 // | |
1960 // Generate core code for disjoint int copy (and oop copy on 32-bit). | |
1961 // If "aligned" is true, the "from" and "to" addresses are assumed | |
1962 // to be heapword aligned. | |
1963 // | |
1964 // Arguments: | |
1965 // from: O0 | |
1966 // to: O1 | |
1967 // count: O2 treated as signed | |
1968 // | |
1969 void generate_disjoint_int_copy_core(bool aligned) { | |
1970 | |
1971 Label L_skip_alignment, L_aligned_copy; | |
1972 Label L_copy_16_bytes, L_copy_4_bytes, L_copy_4_bytes_loop, L_exit; | |
1973 | |
1974 const Register from = O0; // source array address | |
1975 const Register to = O1; // destination array address | |
1976 const Register count = O2; // elements count | |
1977 const Register offset = O5; // offset from start of arrays | |
1978 // O3, O4, G3, G4 are used as temp registers | |
1979 | |
1980 // 'aligned' == true when it is known statically during compilation | |
1981 // of this arraycopy call site that both 'from' and 'to' addresses | |
1982 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
1983 // | |
1984 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
1985 // and 8 bytes - in 64-bits VM. | |
1986 // | |
1987 #ifdef _LP64 | |
1988 if (!aligned) | |
1989 #endif | |
1990 { | |
1991 // The next check could be put under 'ifndef' since the code in | |
1992 // generate_disjoint_long_copy_core() has own checks and set 'offset'. | |
1993 | |
1994 // for short arrays, just do single element copy | |
1995 __ cmp(count, 5); // 4 + 1 (20 bytes) | |
1996 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_4_bytes); | |
1997 __ delayed()->mov(G0, offset); | |
1998 | |
1999 // copy 1 element to align 'to' on an 8 byte boundary | |
2000 __ andcc(to, 7, G0); | |
2001 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
2002 __ delayed()->ld(from, 0, O3); | |
2003 __ inc(from, 4); | |
2004 __ inc(to, 4); | |
2005 __ dec(count); | |
2006 __ st(O3, to, -4); | |
2007 __ BIND(L_skip_alignment); | |
2008 | |
2009 // if arrays have same alignment mod 8, do 4 elements copy | |
2010 __ andcc(from, 7, G0); | |
2011 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
2012 __ delayed()->ld(from, 0, O3); | |
2013 | |
2014 // | |
2015 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
2016 // to form 2 aligned 8-bytes chunks to store. | |
2017 // | |
2018 // copy_16_bytes_forward_with_shift() is not used here since this | |
2019 // code is more optimal. | |
2020 | |
2021 // copy with shift 4 elements (16 bytes) at a time | |
2022 __ dec(count, 4); // The cmp at the beginning guaranty count >= 4 | |
2023 | |
1365 | 2024 __ align(OptoLoopAlignment); |
0 | 2025 __ BIND(L_copy_16_bytes); |
2026 __ ldx(from, 4, O4); | |
2027 __ deccc(count, 4); // Can we do next iteration after this one? | |
2028 __ ldx(from, 12, G4); | |
2029 __ inc(to, 16); | |
2030 __ inc(from, 16); | |
2031 __ sllx(O3, 32, O3); | |
2032 __ srlx(O4, 32, G3); | |
2033 __ bset(G3, O3); | |
2034 __ stx(O3, to, -16); | |
2035 __ sllx(O4, 32, O4); | |
2036 __ srlx(G4, 32, G3); | |
2037 __ bset(G3, O4); | |
2038 __ stx(O4, to, -8); | |
2039 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes); | |
2040 __ delayed()->mov(G4, O3); | |
2041 | |
2042 __ br(Assembler::always, false, Assembler::pt, L_copy_4_bytes); | |
2043 __ delayed()->inc(count, 4); // restore 'count' | |
2044 | |
2045 __ BIND(L_aligned_copy); | |
2046 } | |
2047 // copy 4 elements (16 bytes) at a time | |
2048 __ and3(count, 1, G4); // Save | |
2049 __ srl(count, 1, count); | |
2050 generate_disjoint_long_copy_core(aligned); | |
2051 __ mov(G4, count); // Restore | |
2052 | |
2053 // copy 1 element at a time | |
2054 __ BIND(L_copy_4_bytes); | |
2055 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
2056 __ delayed()->nop(); | |
2057 __ BIND(L_copy_4_bytes_loop); | |
2058 __ ld(from, offset, O3); | |
2059 __ deccc(count); | |
2060 __ st(O3, to, offset); | |
2061 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_4_bytes_loop); | |
2062 __ delayed()->inc(offset, 4); | |
2063 __ BIND(L_exit); | |
2064 } | |
2065 | |
2066 // | |
2067 // Generate stub for disjoint int copy. If "aligned" is true, the | |
2068 // "from" and "to" addresses are assumed to be heapword aligned. | |
2069 // | |
2070 // Arguments for generated stub: | |
2071 // from: O0 | |
2072 // to: O1 | |
2073 // count: O2 treated as signed | |
2074 // | |
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2075 address generate_disjoint_int_copy(bool aligned, address *entry, const char *name) { |
0 | 2076 __ align(CodeEntryAlignment); |
2077 StubCodeMark mark(this, "StubRoutines", name); | |
2078 address start = __ pc(); | |
2079 | |
2080 const Register count = O2; | |
2081 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
2082 | |
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2083 if (entry != NULL) { |
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2084 *entry = __ pc(); |
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2085 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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2086 BLOCK_COMMENT("Entry:"); |
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2087 } |
0 | 2088 |
2089 generate_disjoint_int_copy_core(aligned); | |
2090 | |
2091 // O3, O4 are used as temp registers | |
2092 inc_counter_np(SharedRuntime::_jint_array_copy_ctr, O3, O4); | |
2093 __ retl(); | |
2094 __ delayed()->mov(G0, O0); // return 0 | |
2095 return start; | |
2096 } | |
2097 | |
2098 // | |
2099 // Generate core code for conjoint int copy (and oop copy on 32-bit). | |
2100 // If "aligned" is true, the "from" and "to" addresses are assumed | |
2101 // to be heapword aligned. | |
2102 // | |
2103 // Arguments: | |
2104 // from: O0 | |
2105 // to: O1 | |
2106 // count: O2 treated as signed | |
2107 // | |
2108 void generate_conjoint_int_copy_core(bool aligned) { | |
2109 // Do reverse copy. | |
2110 | |
2111 Label L_skip_alignment, L_aligned_copy; | |
2112 Label L_copy_16_bytes, L_copy_4_bytes, L_copy_4_bytes_loop, L_exit; | |
2113 | |
2114 const Register from = O0; // source array address | |
2115 const Register to = O1; // destination array address | |
2116 const Register count = O2; // elements count | |
2117 const Register end_from = from; // source array end address | |
2118 const Register end_to = to; // destination array end address | |
2119 // O3, O4, O5, G3 are used as temp registers | |
2120 | |
2121 const Register byte_count = O3; // bytes count to copy | |
2122 | |
2123 __ sllx(count, LogBytesPerInt, byte_count); | |
2124 __ add(to, byte_count, end_to); // offset after last copied element | |
2125 | |
2126 __ cmp(count, 5); // for short arrays, just do single element copy | |
2127 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_4_bytes); | |
2128 __ delayed()->add(from, byte_count, end_from); | |
2129 | |
2130 // copy 1 element to align 'to' on an 8 byte boundary | |
2131 __ andcc(end_to, 7, G0); | |
2132 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
2133 __ delayed()->nop(); | |
2134 __ dec(count); | |
2135 __ dec(end_from, 4); | |
2136 __ dec(end_to, 4); | |
2137 __ ld(end_from, 0, O4); | |
2138 __ st(O4, end_to, 0); | |
2139 __ BIND(L_skip_alignment); | |
2140 | |
2141 // Check if 'end_from' and 'end_to' has the same alignment. | |
2142 __ andcc(end_from, 7, G0); | |
2143 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
2144 __ delayed()->dec(count, 4); // The cmp at the start guaranty cnt >= 4 | |
2145 | |
2146 // copy with shift 4 elements (16 bytes) at a time | |
2147 // | |
2148 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
2149 // to form 2 aligned 8-bytes chunks to store. | |
2150 // | |
2151 __ ldx(end_from, -4, O3); | |
1365 | 2152 __ align(OptoLoopAlignment); |
0 | 2153 __ BIND(L_copy_16_bytes); |
2154 __ ldx(end_from, -12, O4); | |
2155 __ deccc(count, 4); | |
2156 __ ldx(end_from, -20, O5); | |
2157 __ dec(end_to, 16); | |
2158 __ dec(end_from, 16); | |
2159 __ srlx(O3, 32, O3); | |
2160 __ sllx(O4, 32, G3); | |
2161 __ bset(G3, O3); | |
2162 __ stx(O3, end_to, 8); | |
2163 __ srlx(O4, 32, O4); | |
2164 __ sllx(O5, 32, G3); | |
2165 __ bset(O4, G3); | |
2166 __ stx(G3, end_to, 0); | |
2167 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes); | |
2168 __ delayed()->mov(O5, O3); | |
2169 | |
2170 __ br(Assembler::always, false, Assembler::pt, L_copy_4_bytes); | |
2171 __ delayed()->inc(count, 4); | |
2172 | |
2173 // copy 4 elements (16 bytes) at a time | |
1365 | 2174 __ align(OptoLoopAlignment); |
0 | 2175 __ BIND(L_aligned_copy); |
2176 __ dec(end_from, 16); | |
2177 __ ldx(end_from, 8, O3); | |
2178 __ ldx(end_from, 0, O4); | |
2179 __ dec(end_to, 16); | |
2180 __ deccc(count, 4); | |
2181 __ stx(O3, end_to, 8); | |
2182 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
2183 __ delayed()->stx(O4, end_to, 0); | |
2184 __ inc(count, 4); | |
2185 | |
2186 // copy 1 element (4 bytes) at a time | |
2187 __ BIND(L_copy_4_bytes); | |
2188 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
2189 __ delayed()->nop(); | |
2190 __ BIND(L_copy_4_bytes_loop); | |
2191 __ dec(end_from, 4); | |
2192 __ dec(end_to, 4); | |
2193 __ ld(end_from, 0, O4); | |
2194 __ deccc(count); | |
2195 __ brx(Assembler::greater, false, Assembler::pt, L_copy_4_bytes_loop); | |
2196 __ delayed()->st(O4, end_to, 0); | |
2197 __ BIND(L_exit); | |
2198 } | |
2199 | |
2200 // | |
2201 // Generate stub for conjoint int copy. If "aligned" is true, the | |
2202 // "from" and "to" addresses are assumed to be heapword aligned. | |
2203 // | |
2204 // Arguments for generated stub: | |
2205 // from: O0 | |
2206 // to: O1 | |
2207 // count: O2 treated as signed | |
2208 // | |
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2209 address generate_conjoint_int_copy(bool aligned, address nooverlap_target, |
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2210 address *entry, const char *name) { |
0 | 2211 __ align(CodeEntryAlignment); |
2212 StubCodeMark mark(this, "StubRoutines", name); | |
2213 address start = __ pc(); | |
2214 | |
2215 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
2216 | |
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2217 if (entry != NULL) { |
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2218 *entry = __ pc(); |
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2219 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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2220 BLOCK_COMMENT("Entry:"); |
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2221 } |
0 | 2222 |
2223 array_overlap_test(nooverlap_target, 2); | |
2224 | |
2225 generate_conjoint_int_copy_core(aligned); | |
2226 | |
2227 // O3, O4 are used as temp registers | |
2228 inc_counter_np(SharedRuntime::_jint_array_copy_ctr, O3, O4); | |
2229 __ retl(); | |
2230 __ delayed()->mov(G0, O0); // return 0 | |
2231 return start; | |
2232 } | |
2233 | |
2234 // | |
2235 // Generate core code for disjoint long copy (and oop copy on 64-bit). | |
2236 // "aligned" is ignored, because we must make the stronger | |
2237 // assumption that both addresses are always 64-bit aligned. | |
2238 // | |
2239 // Arguments: | |
2240 // from: O0 | |
2241 // to: O1 | |
2242 // count: O2 treated as signed | |
2243 // | |
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2244 // count -= 2; |
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2245 // if ( count >= 0 ) { // >= 2 elements |
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2246 // if ( count > 6) { // >= 8 elements |
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2247 // count -= 6; // original count - 8 |
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2248 // do { |
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2249 // copy_8_elements; |
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2250 // count -= 8; |
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2251 // } while ( count >= 0 ); |
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2252 // count += 6; |
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2253 // } |
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2254 // if ( count >= 0 ) { // >= 2 elements |
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2255 // do { |
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2256 // copy_2_elements; |
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2257 // } while ( (count=count-2) >= 0 ); |
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2258 // } |
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2259 // } |
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2260 // count += 2; |
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2261 // if ( count != 0 ) { // 1 element left |
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2262 // copy_1_element; |
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2263 // } |
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2264 // |
0 | 2265 void generate_disjoint_long_copy_core(bool aligned) { |
2266 Label L_copy_8_bytes, L_copy_16_bytes, L_exit; | |
2267 const Register from = O0; // source array address | |
2268 const Register to = O1; // destination array address | |
2269 const Register count = O2; // elements count | |
2270 const Register offset0 = O4; // element offset | |
2271 const Register offset8 = O5; // next element offset | |
2272 | |
2273 __ deccc(count, 2); | |
2274 __ mov(G0, offset0); // offset from start of arrays (0) | |
2275 __ brx(Assembler::negative, false, Assembler::pn, L_copy_8_bytes ); | |
2276 __ delayed()->add(offset0, 8, offset8); | |
1364
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2277 |
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2278 // Copy by 64 bytes chunks |
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2279 Label L_copy_64_bytes; |
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2280 const Register from64 = O3; // source address |
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2281 const Register to64 = G3; // destination address |
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2282 __ subcc(count, 6, O3); |
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2283 __ brx(Assembler::negative, false, Assembler::pt, L_copy_16_bytes ); |
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2284 __ delayed()->mov(to, to64); |
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2285 // Now we can use O4(offset0), O5(offset8) as temps |
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2286 __ mov(O3, count); |
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2287 __ mov(from, from64); |
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2288 |
1365 | 2289 __ align(OptoLoopAlignment); |
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2290 __ BIND(L_copy_64_bytes); |
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2291 for( int off = 0; off < 64; off += 16 ) { |
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2292 __ ldx(from64, off+0, O4); |
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2293 __ ldx(from64, off+8, O5); |
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2294 __ stx(O4, to64, off+0); |
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2295 __ stx(O5, to64, off+8); |
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2296 } |
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2297 __ deccc(count, 8); |
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2298 __ inc(from64, 64); |
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2299 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_64_bytes); |
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2300 __ delayed()->inc(to64, 64); |
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2301 |
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2302 // Restore O4(offset0), O5(offset8) |
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2303 __ sub(from64, from, offset0); |
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2304 __ inccc(count, 6); |
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2305 __ brx(Assembler::negative, false, Assembler::pn, L_copy_8_bytes ); |
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2306 __ delayed()->add(offset0, 8, offset8); |
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2307 |
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2308 // Copy by 16 bytes chunks |
1365 | 2309 __ align(OptoLoopAlignment); |
0 | 2310 __ BIND(L_copy_16_bytes); |
2311 __ ldx(from, offset0, O3); | |
2312 __ ldx(from, offset8, G3); | |
2313 __ deccc(count, 2); | |
2314 __ stx(O3, to, offset0); | |
2315 __ inc(offset0, 16); | |
2316 __ stx(G3, to, offset8); | |
2317 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes); | |
2318 __ delayed()->inc(offset8, 16); | |
2319 | |
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2320 // Copy last 8 bytes |
0 | 2321 __ BIND(L_copy_8_bytes); |
2322 __ inccc(count, 2); | |
2323 __ brx(Assembler::zero, true, Assembler::pn, L_exit ); | |
2324 __ delayed()->mov(offset0, offset8); // Set O5 used by other stubs | |
2325 __ ldx(from, offset0, O3); | |
2326 __ stx(O3, to, offset0); | |
2327 __ BIND(L_exit); | |
2328 } | |
2329 | |
2330 // | |
2331 // Generate stub for disjoint long copy. | |
2332 // "aligned" is ignored, because we must make the stronger | |
2333 // assumption that both addresses are always 64-bit aligned. | |
2334 // | |
2335 // Arguments for generated stub: | |
2336 // from: O0 | |
2337 // to: O1 | |
2338 // count: O2 treated as signed | |
2339 // | |
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2340 address generate_disjoint_long_copy(bool aligned, address *entry, const char *name) { |
0 | 2341 __ align(CodeEntryAlignment); |
2342 StubCodeMark mark(this, "StubRoutines", name); | |
2343 address start = __ pc(); | |
2344 | |
2345 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
2346 | |
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2347 if (entry != NULL) { |
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2348 *entry = __ pc(); |
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2349 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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2350 BLOCK_COMMENT("Entry:"); |
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2351 } |
0 | 2352 |
2353 generate_disjoint_long_copy_core(aligned); | |
2354 | |
2355 // O3, O4 are used as temp registers | |
2356 inc_counter_np(SharedRuntime::_jlong_array_copy_ctr, O3, O4); | |
2357 __ retl(); | |
2358 __ delayed()->mov(G0, O0); // return 0 | |
2359 return start; | |
2360 } | |
2361 | |
2362 // | |
2363 // Generate core code for conjoint long copy (and oop copy on 64-bit). | |
2364 // "aligned" is ignored, because we must make the stronger | |
2365 // assumption that both addresses are always 64-bit aligned. | |
2366 // | |
2367 // Arguments: | |
2368 // from: O0 | |
2369 // to: O1 | |
2370 // count: O2 treated as signed | |
2371 // | |
2372 void generate_conjoint_long_copy_core(bool aligned) { | |
2373 // Do reverse copy. | |
2374 Label L_copy_8_bytes, L_copy_16_bytes, L_exit; | |
2375 const Register from = O0; // source array address | |
2376 const Register to = O1; // destination array address | |
2377 const Register count = O2; // elements count | |
2378 const Register offset8 = O4; // element offset | |
2379 const Register offset0 = O5; // previous element offset | |
2380 | |
2381 __ subcc(count, 1, count); | |
2382 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_8_bytes ); | |
2383 __ delayed()->sllx(count, LogBytesPerLong, offset8); | |
2384 __ sub(offset8, 8, offset0); | |
1365 | 2385 __ align(OptoLoopAlignment); |
0 | 2386 __ BIND(L_copy_16_bytes); |
2387 __ ldx(from, offset8, O2); | |
2388 __ ldx(from, offset0, O3); | |
2389 __ stx(O2, to, offset8); | |
2390 __ deccc(offset8, 16); // use offset8 as counter | |
2391 __ stx(O3, to, offset0); | |
2392 __ brx(Assembler::greater, false, Assembler::pt, L_copy_16_bytes); | |
2393 __ delayed()->dec(offset0, 16); | |
2394 | |
2395 __ BIND(L_copy_8_bytes); | |
2396 __ brx(Assembler::negative, false, Assembler::pn, L_exit ); | |
2397 __ delayed()->nop(); | |
2398 __ ldx(from, 0, O3); | |
2399 __ stx(O3, to, 0); | |
2400 __ BIND(L_exit); | |
2401 } | |
2402 | |
2403 // Generate stub for conjoint long copy. | |
2404 // "aligned" is ignored, because we must make the stronger | |
2405 // assumption that both addresses are always 64-bit aligned. | |
2406 // | |
2407 // Arguments for generated stub: | |
2408 // from: O0 | |
2409 // to: O1 | |
2410 // count: O2 treated as signed | |
2411 // | |
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2412 address generate_conjoint_long_copy(bool aligned, address nooverlap_target, |
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2413 address *entry, const char *name) { |
0 | 2414 __ align(CodeEntryAlignment); |
2415 StubCodeMark mark(this, "StubRoutines", name); | |
2416 address start = __ pc(); | |
2417 | |
2324 | 2418 assert(aligned, "Should always be aligned"); |
0 | 2419 |
2420 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
2421 | |
2313
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2422 if (entry != NULL) { |
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2423 *entry = __ pc(); |
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2424 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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2425 BLOCK_COMMENT("Entry:"); |
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2426 } |
0 | 2427 |
2428 array_overlap_test(nooverlap_target, 3); | |
2429 | |
2430 generate_conjoint_long_copy_core(aligned); | |
2431 | |
2432 // O3, O4 are used as temp registers | |
2433 inc_counter_np(SharedRuntime::_jlong_array_copy_ctr, O3, O4); | |
2434 __ retl(); | |
2435 __ delayed()->mov(G0, O0); // return 0 | |
2436 return start; | |
2437 } | |
2438 | |
2439 // Generate stub for disjoint oop copy. If "aligned" is true, the | |
2440 // "from" and "to" addresses are assumed to be heapword aligned. | |
2441 // | |
2442 // Arguments for generated stub: | |
2443 // from: O0 | |
2444 // to: O1 | |
2445 // count: O2 treated as signed | |
2446 // | |
2324 | 2447 address generate_disjoint_oop_copy(bool aligned, address *entry, const char *name, |
2448 bool dest_uninitialized = false) { | |
0 | 2449 |
2450 const Register from = O0; // source array address | |
2451 const Register to = O1; // destination array address | |
2452 const Register count = O2; // elements count | |
2453 | |
2454 __ align(CodeEntryAlignment); | |
2455 StubCodeMark mark(this, "StubRoutines", name); | |
2456 address start = __ pc(); | |
2457 | |
2458 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
2459 | |
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2460 if (entry != NULL) { |
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2461 *entry = __ pc(); |
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2462 // caller can pass a 64-bit byte count here |
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2463 BLOCK_COMMENT("Entry:"); |
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2464 } |
0 | 2465 |
2466 // save arguments for barrier generation | |
2467 __ mov(to, G1); | |
2468 __ mov(count, G5); | |
2324 | 2469 gen_write_ref_array_pre_barrier(G1, G5, dest_uninitialized); |
0 | 2470 #ifdef _LP64 |
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2471 assert_clean_int(count, O3); // Make sure 'count' is clean int. |
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2472 if (UseCompressedOops) { |
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2473 generate_disjoint_int_copy_core(aligned); |
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2474 } else { |
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2475 generate_disjoint_long_copy_core(aligned); |
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2476 } |
0 | 2477 #else |
2478 generate_disjoint_int_copy_core(aligned); | |
2479 #endif | |
2480 // O0 is used as temp register | |
2481 gen_write_ref_array_post_barrier(G1, G5, O0); | |
2482 | |
2483 // O3, O4 are used as temp registers | |
2484 inc_counter_np(SharedRuntime::_oop_array_copy_ctr, O3, O4); | |
2485 __ retl(); | |
2486 __ delayed()->mov(G0, O0); // return 0 | |
2487 return start; | |
2488 } | |
2489 | |
2490 // Generate stub for conjoint oop copy. If "aligned" is true, the | |
2491 // "from" and "to" addresses are assumed to be heapword aligned. | |
2492 // | |
2493 // Arguments for generated stub: | |
2494 // from: O0 | |
2495 // to: O1 | |
2496 // count: O2 treated as signed | |
2497 // | |
2313
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2498 address generate_conjoint_oop_copy(bool aligned, address nooverlap_target, |
2324 | 2499 address *entry, const char *name, |
2500 bool dest_uninitialized = false) { | |
0 | 2501 |
2502 const Register from = O0; // source array address | |
2503 const Register to = O1; // destination array address | |
2504 const Register count = O2; // elements count | |
2505 | |
2506 __ align(CodeEntryAlignment); | |
2507 StubCodeMark mark(this, "StubRoutines", name); | |
2508 address start = __ pc(); | |
2509 | |
2510 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
2511 | |
2313
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2512 if (entry != NULL) { |
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2513 *entry = __ pc(); |
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2514 // caller can pass a 64-bit byte count here |
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2515 BLOCK_COMMENT("Entry:"); |
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2516 } |
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2517 |
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2518 array_overlap_test(nooverlap_target, LogBytesPerHeapOop); |
0 | 2519 |
2520 // save arguments for barrier generation | |
2521 __ mov(to, G1); | |
2522 __ mov(count, G5); | |
2324 | 2523 gen_write_ref_array_pre_barrier(G1, G5, dest_uninitialized); |
0 | 2524 |
2525 #ifdef _LP64 | |
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2526 if (UseCompressedOops) { |
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2527 generate_conjoint_int_copy_core(aligned); |
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2528 } else { |
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2529 generate_conjoint_long_copy_core(aligned); |
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2530 } |
0 | 2531 #else |
2532 generate_conjoint_int_copy_core(aligned); | |
2533 #endif | |
2534 | |
2535 // O0 is used as temp register | |
2536 gen_write_ref_array_post_barrier(G1, G5, O0); | |
2537 | |
2538 // O3, O4 are used as temp registers | |
2539 inc_counter_np(SharedRuntime::_oop_array_copy_ctr, O3, O4); | |
2540 __ retl(); | |
2541 __ delayed()->mov(G0, O0); // return 0 | |
2542 return start; | |
2543 } | |
2544 | |
2545 | |
2546 // Helper for generating a dynamic type check. | |
2547 // Smashes only the given temp registers. | |
2548 void generate_type_check(Register sub_klass, | |
2549 Register super_check_offset, | |
2550 Register super_klass, | |
2551 Register temp, | |
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2552 Label& L_success) { |
0 | 2553 assert_different_registers(sub_klass, super_check_offset, super_klass, temp); |
2554 | |
2555 BLOCK_COMMENT("type_check:"); | |
2556 | |
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2557 Label L_miss, L_pop_to_miss; |
0 | 2558 |
2559 assert_clean_int(super_check_offset, temp); | |
2560 | |
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2561 __ check_klass_subtype_fast_path(sub_klass, super_klass, temp, noreg, |
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2562 &L_success, &L_miss, NULL, |
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2563 super_check_offset); |
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2564 |
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2565 BLOCK_COMMENT("type_check_slow_path:"); |
0 | 2566 __ save_frame(0); |
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2567 __ check_klass_subtype_slow_path(sub_klass->after_save(), |
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2568 super_klass->after_save(), |
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2569 L0, L1, L2, L4, |
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2570 NULL, &L_pop_to_miss); |
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2571 __ ba(false, L_success); |
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2572 __ delayed()->restore(); |
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2573 |
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2574 __ bind(L_pop_to_miss); |
0 | 2575 __ restore(); |
2576 | |
2577 // Fall through on failure! | |
2578 __ BIND(L_miss); | |
2579 } | |
2580 | |
2581 | |
2582 // Generate stub for checked oop copy. | |
2583 // | |
2584 // Arguments for generated stub: | |
2585 // from: O0 | |
2586 // to: O1 | |
2587 // count: O2 treated as signed | |
2588 // ckoff: O3 (super_check_offset) | |
2589 // ckval: O4 (super_klass) | |
2590 // ret: O0 zero for success; (-1^K) where K is partial transfer count | |
2591 // | |
2324 | 2592 address generate_checkcast_copy(const char *name, address *entry, bool dest_uninitialized = false) { |
0 | 2593 |
2594 const Register O0_from = O0; // source array address | |
2595 const Register O1_to = O1; // destination array address | |
2596 const Register O2_count = O2; // elements count | |
2597 const Register O3_ckoff = O3; // super_check_offset | |
2598 const Register O4_ckval = O4; // super_klass | |
2599 | |
2600 const Register O5_offset = O5; // loop var, with stride wordSize | |
2601 const Register G1_remain = G1; // loop var, with stride -1 | |
2602 const Register G3_oop = G3; // actual oop copied | |
2603 const Register G4_klass = G4; // oop._klass | |
2604 const Register G5_super = G5; // oop._klass._primary_supers[ckval] | |
2605 | |
2606 __ align(CodeEntryAlignment); | |
2607 StubCodeMark mark(this, "StubRoutines", name); | |
2608 address start = __ pc(); | |
2609 | |
2610 #ifdef ASSERT | |
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2611 // We sometimes save a frame (see generate_type_check below). |
0 | 2612 // If this will cause trouble, let's fail now instead of later. |
2613 __ save_frame(0); | |
2614 __ restore(); | |
2615 #endif | |
2616 | |
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2617 assert_clean_int(O2_count, G1); // Make sure 'count' is clean int. |
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2618 |
0 | 2619 #ifdef ASSERT |
2620 // caller guarantees that the arrays really are different | |
2621 // otherwise, we would have to make conjoint checks | |
2622 { Label L; | |
2623 __ mov(O3, G1); // spill: overlap test smashes O3 | |
2624 __ mov(O4, G4); // spill: overlap test smashes O4 | |
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2625 array_overlap_test(L, LogBytesPerHeapOop); |
0 | 2626 __ stop("checkcast_copy within a single array"); |
2627 __ bind(L); | |
2628 __ mov(G1, O3); | |
2629 __ mov(G4, O4); | |
2630 } | |
2631 #endif //ASSERT | |
2632 | |
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2633 if (entry != NULL) { |
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2634 *entry = __ pc(); |
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2635 // caller can pass a 64-bit byte count here (from generic stub) |
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2636 BLOCK_COMMENT("Entry:"); |
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2637 } |
2324 | 2638 gen_write_ref_array_pre_barrier(O1_to, O2_count, dest_uninitialized); |
0 | 2639 |
2640 Label load_element, store_element, do_card_marks, fail, done; | |
2641 __ addcc(O2_count, 0, G1_remain); // initialize loop index, and test it | |
2642 __ brx(Assembler::notZero, false, Assembler::pt, load_element); | |
2643 __ delayed()->mov(G0, O5_offset); // offset from start of arrays | |
2644 | |
2645 // Empty array: Nothing to do. | |
2646 inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr, O3, O4); | |
2647 __ retl(); | |
2648 __ delayed()->set(0, O0); // return 0 on (trivial) success | |
2649 | |
2650 // ======== begin loop ======== | |
2651 // (Loop is rotated; its entry is load_element.) | |
2652 // Loop variables: | |
2653 // (O5 = 0; ; O5 += wordSize) --- offset from src, dest arrays | |
2654 // (O2 = len; O2 != 0; O2--) --- number of oops *remaining* | |
2655 // G3, G4, G5 --- current oop, oop.klass, oop.klass.super | |
1365 | 2656 __ align(OptoLoopAlignment); |
0 | 2657 |
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2658 __ BIND(store_element); |
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2659 __ deccc(G1_remain); // decrement the count |
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2660 __ store_heap_oop(G3_oop, O1_to, O5_offset); // store the oop |
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2661 __ inc(O5_offset, heapOopSize); // step to next offset |
0 | 2662 __ brx(Assembler::zero, true, Assembler::pt, do_card_marks); |
2663 __ delayed()->set(0, O0); // return -1 on success | |
2664 | |
2665 // ======== loop entry is here ======== | |
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2666 __ BIND(load_element); |
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2667 __ load_heap_oop(O0_from, O5_offset, G3_oop); // load the oop |
0 | 2668 __ br_null(G3_oop, true, Assembler::pt, store_element); |
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2669 __ delayed()->nop(); |
0 | 2670 |
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2671 __ load_klass(G3_oop, G4_klass); // query the object klass |
0 | 2672 |
2673 generate_type_check(G4_klass, O3_ckoff, O4_ckval, G5_super, | |
2674 // branch to this on success: | |
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2675 store_element); |
0 | 2676 // ======== end loop ======== |
2677 | |
2678 // It was a real error; we must depend on the caller to finish the job. | |
2679 // Register G1 has number of *remaining* oops, O2 number of *total* oops. | |
2680 // Emit GC store barriers for the oops we have copied (O2 minus G1), | |
2681 // and report their number to the caller. | |
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2682 __ BIND(fail); |
0 | 2683 __ subcc(O2_count, G1_remain, O2_count); |
2684 __ brx(Assembler::zero, false, Assembler::pt, done); | |
2685 __ delayed()->not1(O2_count, O0); // report (-1^K) to caller | |
2686 | |
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2687 __ BIND(do_card_marks); |
0 | 2688 gen_write_ref_array_post_barrier(O1_to, O2_count, O3); // store check on O1[0..O2] |
2689 | |
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2690 __ BIND(done); |
0 | 2691 inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr, O3, O4); |
2692 __ retl(); | |
2693 __ delayed()->nop(); // return value in 00 | |
2694 | |
2695 return start; | |
2696 } | |
2697 | |
2698 | |
2699 // Generate 'unsafe' array copy stub | |
2700 // Though just as safe as the other stubs, it takes an unscaled | |
2701 // size_t argument instead of an element count. | |
2702 // | |
2703 // Arguments for generated stub: | |
2704 // from: O0 | |
2705 // to: O1 | |
2706 // count: O2 byte count, treated as ssize_t, can be zero | |
2707 // | |
2708 // Examines the alignment of the operands and dispatches | |
2709 // to a long, int, short, or byte copy loop. | |
2710 // | |
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2711 address generate_unsafe_copy(const char* name, |
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2712 address byte_copy_entry, |
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2713 address short_copy_entry, |
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2714 address int_copy_entry, |
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2715 address long_copy_entry) { |
0 | 2716 |
2717 const Register O0_from = O0; // source array address | |
2718 const Register O1_to = O1; // destination array address | |
2719 const Register O2_count = O2; // elements count | |
2720 | |
2721 const Register G1_bits = G1; // test copy of low bits | |
2722 | |
2723 __ align(CodeEntryAlignment); | |
2724 StubCodeMark mark(this, "StubRoutines", name); | |
2725 address start = __ pc(); | |
2726 | |
2727 // bump this on entry, not on exit: | |
2728 inc_counter_np(SharedRuntime::_unsafe_array_copy_ctr, G1, G3); | |
2729 | |
2730 __ or3(O0_from, O1_to, G1_bits); | |
2731 __ or3(O2_count, G1_bits, G1_bits); | |
2732 | |
2733 __ btst(BytesPerLong-1, G1_bits); | |
2734 __ br(Assembler::zero, true, Assembler::pt, | |
2735 long_copy_entry, relocInfo::runtime_call_type); | |
2736 // scale the count on the way out: | |
2737 __ delayed()->srax(O2_count, LogBytesPerLong, O2_count); | |
2738 | |
2739 __ btst(BytesPerInt-1, G1_bits); | |
2740 __ br(Assembler::zero, true, Assembler::pt, | |
2741 int_copy_entry, relocInfo::runtime_call_type); | |
2742 // scale the count on the way out: | |
2743 __ delayed()->srax(O2_count, LogBytesPerInt, O2_count); | |
2744 | |
2745 __ btst(BytesPerShort-1, G1_bits); | |
2746 __ br(Assembler::zero, true, Assembler::pt, | |
2747 short_copy_entry, relocInfo::runtime_call_type); | |
2748 // scale the count on the way out: | |
2749 __ delayed()->srax(O2_count, LogBytesPerShort, O2_count); | |
2750 | |
2751 __ br(Assembler::always, false, Assembler::pt, | |
2752 byte_copy_entry, relocInfo::runtime_call_type); | |
2753 __ delayed()->nop(); | |
2754 | |
2755 return start; | |
2756 } | |
2757 | |
2758 | |
2759 // Perform range checks on the proposed arraycopy. | |
2760 // Kills the two temps, but nothing else. | |
2761 // Also, clean the sign bits of src_pos and dst_pos. | |
2762 void arraycopy_range_checks(Register src, // source array oop (O0) | |
2763 Register src_pos, // source position (O1) | |
2764 Register dst, // destination array oo (O2) | |
2765 Register dst_pos, // destination position (O3) | |
2766 Register length, // length of copy (O4) | |
2767 Register temp1, Register temp2, | |
2768 Label& L_failed) { | |
2769 BLOCK_COMMENT("arraycopy_range_checks:"); | |
2770 | |
2771 // if (src_pos + length > arrayOop(src)->length() ) FAIL; | |
2772 | |
2773 const Register array_length = temp1; // scratch | |
2774 const Register end_pos = temp2; // scratch | |
2775 | |
2776 // Note: This next instruction may be in the delay slot of a branch: | |
2777 __ add(length, src_pos, end_pos); // src_pos + length | |
2778 __ lduw(src, arrayOopDesc::length_offset_in_bytes(), array_length); | |
2779 __ cmp(end_pos, array_length); | |
2780 __ br(Assembler::greater, false, Assembler::pn, L_failed); | |
2781 | |
2782 // if (dst_pos + length > arrayOop(dst)->length() ) FAIL; | |
2783 __ delayed()->add(length, dst_pos, end_pos); // dst_pos + length | |
2784 __ lduw(dst, arrayOopDesc::length_offset_in_bytes(), array_length); | |
2785 __ cmp(end_pos, array_length); | |
2786 __ br(Assembler::greater, false, Assembler::pn, L_failed); | |
2787 | |
2788 // Have to clean up high 32-bits of 'src_pos' and 'dst_pos'. | |
2789 // Move with sign extension can be used since they are positive. | |
2790 __ delayed()->signx(src_pos, src_pos); | |
2791 __ signx(dst_pos, dst_pos); | |
2792 | |
2793 BLOCK_COMMENT("arraycopy_range_checks done"); | |
2794 } | |
2795 | |
2796 | |
2797 // | |
2798 // Generate generic array copy stubs | |
2799 // | |
2800 // Input: | |
2801 // O0 - src oop | |
2802 // O1 - src_pos | |
2803 // O2 - dst oop | |
2804 // O3 - dst_pos | |
2805 // O4 - element count | |
2806 // | |
2807 // Output: | |
2808 // O0 == 0 - success | |
2809 // O0 == -1 - need to call System.arraycopy | |
2810 // | |
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2811 address generate_generic_copy(const char *name, |
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2812 address entry_jbyte_arraycopy, |
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2813 address entry_jshort_arraycopy, |
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2814 address entry_jint_arraycopy, |
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2815 address entry_oop_arraycopy, |
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2816 address entry_jlong_arraycopy, |
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2817 address entry_checkcast_arraycopy) { |
0 | 2818 Label L_failed, L_objArray; |
2819 | |
2820 // Input registers | |
2821 const Register src = O0; // source array oop | |
2822 const Register src_pos = O1; // source position | |
2823 const Register dst = O2; // destination array oop | |
2824 const Register dst_pos = O3; // destination position | |
2825 const Register length = O4; // elements count | |
2826 | |
2827 // registers used as temp | |
2828 const Register G3_src_klass = G3; // source array klass | |
2829 const Register G4_dst_klass = G4; // destination array klass | |
2830 const Register G5_lh = G5; // layout handler | |
2831 const Register O5_temp = O5; | |
2832 | |
2833 __ align(CodeEntryAlignment); | |
2834 StubCodeMark mark(this, "StubRoutines", name); | |
2835 address start = __ pc(); | |
2836 | |
2837 // bump this on entry, not on exit: | |
2838 inc_counter_np(SharedRuntime::_generic_array_copy_ctr, G1, G3); | |
2839 | |
2840 // In principle, the int arguments could be dirty. | |
2841 //assert_clean_int(src_pos, G1); | |
2842 //assert_clean_int(dst_pos, G1); | |
2843 //assert_clean_int(length, G1); | |
2844 | |
2845 //----------------------------------------------------------------------- | |
2846 // Assembler stubs will be used for this call to arraycopy | |
2847 // if the following conditions are met: | |
2848 // | |
2849 // (1) src and dst must not be null. | |
2850 // (2) src_pos must not be negative. | |
2851 // (3) dst_pos must not be negative. | |
2852 // (4) length must not be negative. | |
2853 // (5) src klass and dst klass should be the same and not NULL. | |
2854 // (6) src and dst should be arrays. | |
2855 // (7) src_pos + length must not exceed length of src. | |
2856 // (8) dst_pos + length must not exceed length of dst. | |
2857 BLOCK_COMMENT("arraycopy initial argument checks"); | |
2858 | |
2859 // if (src == NULL) return -1; | |
2860 __ br_null(src, false, Assembler::pn, L_failed); | |
2861 | |
2862 // if (src_pos < 0) return -1; | |
2863 __ delayed()->tst(src_pos); | |
2864 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
2865 __ delayed()->nop(); | |
2866 | |
2867 // if (dst == NULL) return -1; | |
2868 __ br_null(dst, false, Assembler::pn, L_failed); | |
2869 | |
2870 // if (dst_pos < 0) return -1; | |
2871 __ delayed()->tst(dst_pos); | |
2872 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
2873 | |
2874 // if (length < 0) return -1; | |
2875 __ delayed()->tst(length); | |
2876 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
2877 | |
2878 BLOCK_COMMENT("arraycopy argument klass checks"); | |
2879 // get src->klass() | |
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2880 if (UseCompressedOops) { |
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2881 __ delayed()->nop(); // ??? not good |
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2882 __ load_klass(src, G3_src_klass); |
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2883 } else { |
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2884 __ delayed()->ld_ptr(src, oopDesc::klass_offset_in_bytes(), G3_src_klass); |
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2885 } |
0 | 2886 |
2887 #ifdef ASSERT | |
2888 // assert(src->klass() != NULL); | |
2889 BLOCK_COMMENT("assert klasses not null"); | |
2890 { Label L_a, L_b; | |
2891 __ br_notnull(G3_src_klass, false, Assembler::pt, L_b); // it is broken if klass is NULL | |
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2892 __ delayed()->nop(); |
0 | 2893 __ bind(L_a); |
2894 __ stop("broken null klass"); | |
2895 __ bind(L_b); | |
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2896 __ load_klass(dst, G4_dst_klass); |
0 | 2897 __ br_null(G4_dst_klass, false, Assembler::pn, L_a); // this would be broken also |
2898 __ delayed()->mov(G0, G4_dst_klass); // scribble the temp | |
2899 BLOCK_COMMENT("assert done"); | |
2900 } | |
2901 #endif | |
2902 | |
2903 // Load layout helper | |
2904 // | |
2905 // |array_tag| | header_size | element_type | |log2_element_size| | |
2906 // 32 30 24 16 8 2 0 | |
2907 // | |
2908 // array_tag: typeArray = 0x3, objArray = 0x2, non-array = 0x0 | |
2909 // | |
2910 | |
2911 int lh_offset = klassOopDesc::header_size() * HeapWordSize + | |
2912 Klass::layout_helper_offset_in_bytes(); | |
2913 | |
2914 // Load 32-bits signed value. Use br() instruction with it to check icc. | |
2915 __ lduw(G3_src_klass, lh_offset, G5_lh); | |
2916 | |
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2917 if (UseCompressedOops) { |
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2918 __ load_klass(dst, G4_dst_klass); |
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2919 } |
0 | 2920 // Handle objArrays completely differently... |
2921 juint objArray_lh = Klass::array_layout_helper(T_OBJECT); | |
2922 __ set(objArray_lh, O5_temp); | |
2923 __ cmp(G5_lh, O5_temp); | |
2924 __ br(Assembler::equal, false, Assembler::pt, L_objArray); | |
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2925 if (UseCompressedOops) { |
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2926 __ delayed()->nop(); |
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2927 } else { |
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2928 __ delayed()->ld_ptr(dst, oopDesc::klass_offset_in_bytes(), G4_dst_klass); |
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2929 } |
0 | 2930 |
2931 // if (src->klass() != dst->klass()) return -1; | |
2932 __ cmp(G3_src_klass, G4_dst_klass); | |
2933 __ brx(Assembler::notEqual, false, Assembler::pn, L_failed); | |
2934 __ delayed()->nop(); | |
2935 | |
2936 // if (!src->is_Array()) return -1; | |
2937 __ cmp(G5_lh, Klass::_lh_neutral_value); // < 0 | |
2938 __ br(Assembler::greaterEqual, false, Assembler::pn, L_failed); | |
2939 | |
2940 // At this point, it is known to be a typeArray (array_tag 0x3). | |
2941 #ifdef ASSERT | |
2942 __ delayed()->nop(); | |
2943 { Label L; | |
2944 jint lh_prim_tag_in_place = (Klass::_lh_array_tag_type_value << Klass::_lh_array_tag_shift); | |
2945 __ set(lh_prim_tag_in_place, O5_temp); | |
2946 __ cmp(G5_lh, O5_temp); | |
2947 __ br(Assembler::greaterEqual, false, Assembler::pt, L); | |
2948 __ delayed()->nop(); | |
2949 __ stop("must be a primitive array"); | |
2950 __ bind(L); | |
2951 } | |
2952 #else | |
2953 __ delayed(); // match next insn to prev branch | |
2954 #endif | |
2955 | |
2956 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
2957 O5_temp, G4_dst_klass, L_failed); | |
2958 | |
2959 // typeArrayKlass | |
2960 // | |
2961 // src_addr = (src + array_header_in_bytes()) + (src_pos << log2elemsize); | |
2962 // dst_addr = (dst + array_header_in_bytes()) + (dst_pos << log2elemsize); | |
2963 // | |
2964 | |
2965 const Register G4_offset = G4_dst_klass; // array offset | |
2966 const Register G3_elsize = G3_src_klass; // log2 element size | |
2967 | |
2968 __ srl(G5_lh, Klass::_lh_header_size_shift, G4_offset); | |
2969 __ and3(G4_offset, Klass::_lh_header_size_mask, G4_offset); // array_offset | |
2970 __ add(src, G4_offset, src); // src array offset | |
2971 __ add(dst, G4_offset, dst); // dst array offset | |
2972 __ and3(G5_lh, Klass::_lh_log2_element_size_mask, G3_elsize); // log2 element size | |
2973 | |
2974 // next registers should be set before the jump to corresponding stub | |
2975 const Register from = O0; // source array address | |
2976 const Register to = O1; // destination array address | |
2977 const Register count = O2; // elements count | |
2978 | |
2979 // 'from', 'to', 'count' registers should be set in this order | |
2980 // since they are the same as 'src', 'src_pos', 'dst'. | |
2981 | |
2982 BLOCK_COMMENT("scale indexes to element size"); | |
2983 __ sll_ptr(src_pos, G3_elsize, src_pos); | |
2984 __ sll_ptr(dst_pos, G3_elsize, dst_pos); | |
2985 __ add(src, src_pos, from); // src_addr | |
2986 __ add(dst, dst_pos, to); // dst_addr | |
2987 | |
2988 BLOCK_COMMENT("choose copy loop based on element size"); | |
2989 __ cmp(G3_elsize, 0); | |
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2990 __ br(Assembler::equal, true, Assembler::pt, entry_jbyte_arraycopy); |
0 | 2991 __ delayed()->signx(length, count); // length |
2992 | |
2993 __ cmp(G3_elsize, LogBytesPerShort); | |
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2994 __ br(Assembler::equal, true, Assembler::pt, entry_jshort_arraycopy); |
0 | 2995 __ delayed()->signx(length, count); // length |
2996 | |
2997 __ cmp(G3_elsize, LogBytesPerInt); | |
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2998 __ br(Assembler::equal, true, Assembler::pt, entry_jint_arraycopy); |
0 | 2999 __ delayed()->signx(length, count); // length |
3000 #ifdef ASSERT | |
3001 { Label L; | |
3002 __ cmp(G3_elsize, LogBytesPerLong); | |
3003 __ br(Assembler::equal, false, Assembler::pt, L); | |
3004 __ delayed()->nop(); | |
3005 __ stop("must be long copy, but elsize is wrong"); | |
3006 __ bind(L); | |
3007 } | |
3008 #endif | |
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3009 __ br(Assembler::always, false, Assembler::pt, entry_jlong_arraycopy); |
0 | 3010 __ delayed()->signx(length, count); // length |
3011 | |
3012 // objArrayKlass | |
3013 __ BIND(L_objArray); | |
3014 // live at this point: G3_src_klass, G4_dst_klass, src[_pos], dst[_pos], length | |
3015 | |
3016 Label L_plain_copy, L_checkcast_copy; | |
3017 // test array classes for subtyping | |
3018 __ cmp(G3_src_klass, G4_dst_klass); // usual case is exact equality | |
3019 __ brx(Assembler::notEqual, true, Assembler::pn, L_checkcast_copy); | |
3020 __ delayed()->lduw(G4_dst_klass, lh_offset, O5_temp); // hoisted from below | |
3021 | |
3022 // Identically typed arrays can be copied without element-wise checks. | |
3023 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
3024 O5_temp, G5_lh, L_failed); | |
3025 | |
3026 __ add(src, arrayOopDesc::base_offset_in_bytes(T_OBJECT), src); //src offset | |
3027 __ add(dst, arrayOopDesc::base_offset_in_bytes(T_OBJECT), dst); //dst offset | |
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3028 __ sll_ptr(src_pos, LogBytesPerHeapOop, src_pos); |
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3029 __ sll_ptr(dst_pos, LogBytesPerHeapOop, dst_pos); |
0 | 3030 __ add(src, src_pos, from); // src_addr |
3031 __ add(dst, dst_pos, to); // dst_addr | |
3032 __ BIND(L_plain_copy); | |
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3033 __ br(Assembler::always, false, Assembler::pt, entry_oop_arraycopy); |
0 | 3034 __ delayed()->signx(length, count); // length |
3035 | |
3036 __ BIND(L_checkcast_copy); | |
3037 // live at this point: G3_src_klass, G4_dst_klass | |
3038 { | |
3039 // Before looking at dst.length, make sure dst is also an objArray. | |
3040 // lduw(G4_dst_klass, lh_offset, O5_temp); // hoisted to delay slot | |
3041 __ cmp(G5_lh, O5_temp); | |
3042 __ br(Assembler::notEqual, false, Assembler::pn, L_failed); | |
3043 | |
3044 // It is safe to examine both src.length and dst.length. | |
3045 __ delayed(); // match next insn to prev branch | |
3046 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
3047 O5_temp, G5_lh, L_failed); | |
3048 | |
3049 // Marshal the base address arguments now, freeing registers. | |
3050 __ add(src, arrayOopDesc::base_offset_in_bytes(T_OBJECT), src); //src offset | |
3051 __ add(dst, arrayOopDesc::base_offset_in_bytes(T_OBJECT), dst); //dst offset | |
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3052 __ sll_ptr(src_pos, LogBytesPerHeapOop, src_pos); |
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3053 __ sll_ptr(dst_pos, LogBytesPerHeapOop, dst_pos); |
0 | 3054 __ add(src, src_pos, from); // src_addr |
3055 __ add(dst, dst_pos, to); // dst_addr | |
3056 __ signx(length, count); // length (reloaded) | |
3057 | |
3058 Register sco_temp = O3; // this register is free now | |
3059 assert_different_registers(from, to, count, sco_temp, | |
3060 G4_dst_klass, G3_src_klass); | |
3061 | |
3062 // Generate the type check. | |
3063 int sco_offset = (klassOopDesc::header_size() * HeapWordSize + | |
3064 Klass::super_check_offset_offset_in_bytes()); | |
3065 __ lduw(G4_dst_klass, sco_offset, sco_temp); | |
3066 generate_type_check(G3_src_klass, sco_temp, G4_dst_klass, | |
3067 O5_temp, L_plain_copy); | |
3068 | |
3069 // Fetch destination element klass from the objArrayKlass header. | |
3070 int ek_offset = (klassOopDesc::header_size() * HeapWordSize + | |
3071 objArrayKlass::element_klass_offset_in_bytes()); | |
3072 | |
3073 // the checkcast_copy loop needs two extra arguments: | |
3074 __ ld_ptr(G4_dst_klass, ek_offset, O4); // dest elem klass | |
3075 // lduw(O4, sco_offset, O3); // sco of elem klass | |
3076 | |
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3077 __ br(Assembler::always, false, Assembler::pt, entry_checkcast_arraycopy); |
0 | 3078 __ delayed()->lduw(O4, sco_offset, O3); |
3079 } | |
3080 | |
3081 __ BIND(L_failed); | |
3082 __ retl(); | |
3083 __ delayed()->sub(G0, 1, O0); // return -1 | |
3084 return start; | |
3085 } | |
3086 | |
3087 void generate_arraycopy_stubs() { | |
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3088 address entry; |
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3089 address entry_jbyte_arraycopy; |
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3090 address entry_jshort_arraycopy; |
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3091 address entry_jint_arraycopy; |
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3092 address entry_oop_arraycopy; |
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3093 address entry_jlong_arraycopy; |
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3094 address entry_checkcast_arraycopy; |
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3095 |
2324 | 3096 //*** jbyte |
3097 // Always need aligned and unaligned versions | |
3098 StubRoutines::_jbyte_disjoint_arraycopy = generate_disjoint_byte_copy(false, &entry, | |
3099 "jbyte_disjoint_arraycopy"); | |
3100 StubRoutines::_jbyte_arraycopy = generate_conjoint_byte_copy(false, entry, | |
3101 &entry_jbyte_arraycopy, | |
3102 "jbyte_arraycopy"); | |
3103 StubRoutines::_arrayof_jbyte_disjoint_arraycopy = generate_disjoint_byte_copy(true, &entry, | |
3104 "arrayof_jbyte_disjoint_arraycopy"); | |
3105 StubRoutines::_arrayof_jbyte_arraycopy = generate_conjoint_byte_copy(true, entry, NULL, | |
3106 "arrayof_jbyte_arraycopy"); | |
3107 | |
3108 //*** jshort | |
3109 // Always need aligned and unaligned versions | |
3110 StubRoutines::_jshort_disjoint_arraycopy = generate_disjoint_short_copy(false, &entry, | |
3111 "jshort_disjoint_arraycopy"); | |
3112 StubRoutines::_jshort_arraycopy = generate_conjoint_short_copy(false, entry, | |
3113 &entry_jshort_arraycopy, | |
3114 "jshort_arraycopy"); | |
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3115 StubRoutines::_arrayof_jshort_disjoint_arraycopy = generate_disjoint_short_copy(true, &entry, |
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3116 "arrayof_jshort_disjoint_arraycopy"); |
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3117 StubRoutines::_arrayof_jshort_arraycopy = generate_conjoint_short_copy(true, entry, NULL, |
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3118 "arrayof_jshort_arraycopy"); |
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3119 |
2324 | 3120 //*** jint |
3121 // Aligned versions | |
3122 StubRoutines::_arrayof_jint_disjoint_arraycopy = generate_disjoint_int_copy(true, &entry, | |
3123 "arrayof_jint_disjoint_arraycopy"); | |
3124 StubRoutines::_arrayof_jint_arraycopy = generate_conjoint_int_copy(true, entry, &entry_jint_arraycopy, | |
3125 "arrayof_jint_arraycopy"); | |
0 | 3126 #ifdef _LP64 |
2324 | 3127 // In 64 bit we need both aligned and unaligned versions of jint arraycopy. |
3128 // entry_jint_arraycopy always points to the unaligned version (notice that we overwrite it). | |
3129 StubRoutines::_jint_disjoint_arraycopy = generate_disjoint_int_copy(false, &entry, | |
3130 "jint_disjoint_arraycopy"); | |
3131 StubRoutines::_jint_arraycopy = generate_conjoint_int_copy(false, entry, | |
3132 &entry_jint_arraycopy, | |
3133 "jint_arraycopy"); | |
3134 #else | |
3135 // In 32 bit jints are always HeapWordSize aligned, so always use the aligned version | |
3136 // (in fact in 32bit we always have a pre-loop part even in the aligned version, | |
3137 // because it uses 64-bit loads/stores, so the aligned flag is actually ignored). | |
3138 StubRoutines::_jint_disjoint_arraycopy = StubRoutines::_arrayof_jint_disjoint_arraycopy; | |
3139 StubRoutines::_jint_arraycopy = StubRoutines::_arrayof_jint_arraycopy; | |
0 | 3140 #endif |
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3141 |
2324 | 3142 |
3143 //*** jlong | |
3144 // It is always aligned | |
3145 StubRoutines::_arrayof_jlong_disjoint_arraycopy = generate_disjoint_long_copy(true, &entry, | |
3146 "arrayof_jlong_disjoint_arraycopy"); | |
3147 StubRoutines::_arrayof_jlong_arraycopy = generate_conjoint_long_copy(true, entry, &entry_jlong_arraycopy, | |
3148 "arrayof_jlong_arraycopy"); | |
3149 StubRoutines::_jlong_disjoint_arraycopy = StubRoutines::_arrayof_jlong_disjoint_arraycopy; | |
3150 StubRoutines::_jlong_arraycopy = StubRoutines::_arrayof_jlong_arraycopy; | |
3151 | |
3152 | |
3153 //*** oops | |
3154 // Aligned versions | |
3155 StubRoutines::_arrayof_oop_disjoint_arraycopy = generate_disjoint_oop_copy(true, &entry, | |
3156 "arrayof_oop_disjoint_arraycopy"); | |
3157 StubRoutines::_arrayof_oop_arraycopy = generate_conjoint_oop_copy(true, entry, &entry_oop_arraycopy, | |
3158 "arrayof_oop_arraycopy"); | |
3159 // Aligned versions without pre-barriers | |
3160 StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = generate_disjoint_oop_copy(true, &entry, | |
3161 "arrayof_oop_disjoint_arraycopy_uninit", | |
3162 /*dest_uninitialized*/true); | |
3163 StubRoutines::_arrayof_oop_arraycopy_uninit = generate_conjoint_oop_copy(true, entry, NULL, | |
3164 "arrayof_oop_arraycopy_uninit", | |
3165 /*dest_uninitialized*/true); | |
3166 #ifdef _LP64 | |
3167 if (UseCompressedOops) { | |
3168 // With compressed oops we need unaligned versions, notice that we overwrite entry_oop_arraycopy. | |
3169 StubRoutines::_oop_disjoint_arraycopy = generate_disjoint_oop_copy(false, &entry, | |
3170 "oop_disjoint_arraycopy"); | |
3171 StubRoutines::_oop_arraycopy = generate_conjoint_oop_copy(false, entry, &entry_oop_arraycopy, | |
3172 "oop_arraycopy"); | |
3173 // Unaligned versions without pre-barriers | |
3174 StubRoutines::_oop_disjoint_arraycopy_uninit = generate_disjoint_oop_copy(false, &entry, | |
3175 "oop_disjoint_arraycopy_uninit", | |
3176 /*dest_uninitialized*/true); | |
3177 StubRoutines::_oop_arraycopy_uninit = generate_conjoint_oop_copy(false, entry, NULL, | |
3178 "oop_arraycopy_uninit", | |
3179 /*dest_uninitialized*/true); | |
3180 } else | |
3181 #endif | |
3182 { | |
3183 // oop arraycopy is always aligned on 32bit and 64bit without compressed oops | |
3184 StubRoutines::_oop_disjoint_arraycopy = StubRoutines::_arrayof_oop_disjoint_arraycopy; | |
3185 StubRoutines::_oop_arraycopy = StubRoutines::_arrayof_oop_arraycopy; | |
3186 StubRoutines::_oop_disjoint_arraycopy_uninit = StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit; | |
3187 StubRoutines::_oop_arraycopy_uninit = StubRoutines::_arrayof_oop_arraycopy_uninit; | |
3188 } | |
3189 | |
3190 StubRoutines::_checkcast_arraycopy = generate_checkcast_copy("checkcast_arraycopy", &entry_checkcast_arraycopy); | |
3191 StubRoutines::_checkcast_arraycopy_uninit = generate_checkcast_copy("checkcast_arraycopy_uninit", NULL, | |
3192 /*dest_uninitialized*/true); | |
3193 | |
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3194 StubRoutines::_unsafe_arraycopy = generate_unsafe_copy("unsafe_arraycopy", |
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3195 entry_jbyte_arraycopy, |
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3196 entry_jshort_arraycopy, |
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3197 entry_jint_arraycopy, |
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3198 entry_jlong_arraycopy); |
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3199 StubRoutines::_generic_arraycopy = generate_generic_copy("generic_arraycopy", |
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3200 entry_jbyte_arraycopy, |
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3201 entry_jshort_arraycopy, |
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3202 entry_jint_arraycopy, |
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3203 entry_oop_arraycopy, |
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3204 entry_jlong_arraycopy, |
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3205 entry_checkcast_arraycopy); |
1763 | 3206 |
3207 StubRoutines::_jbyte_fill = generate_fill(T_BYTE, false, "jbyte_fill"); | |
3208 StubRoutines::_jshort_fill = generate_fill(T_SHORT, false, "jshort_fill"); | |
3209 StubRoutines::_jint_fill = generate_fill(T_INT, false, "jint_fill"); | |
3210 StubRoutines::_arrayof_jbyte_fill = generate_fill(T_BYTE, true, "arrayof_jbyte_fill"); | |
3211 StubRoutines::_arrayof_jshort_fill = generate_fill(T_SHORT, true, "arrayof_jshort_fill"); | |
3212 StubRoutines::_arrayof_jint_fill = generate_fill(T_INT, true, "arrayof_jint_fill"); | |
0 | 3213 } |
3214 | |
3215 void generate_initial() { | |
3216 // Generates all stubs and initializes the entry points | |
3217 | |
3218 //------------------------------------------------------------------------------------------------------------------------ | |
3219 // entry points that exist in all platforms | |
3220 // Note: This is code that could be shared among different platforms - however the benefit seems to be smaller than | |
3221 // the disadvantage of having a much more complicated generator structure. See also comment in stubRoutines.hpp. | |
3222 StubRoutines::_forward_exception_entry = generate_forward_exception(); | |
3223 | |
3224 StubRoutines::_call_stub_entry = generate_call_stub(StubRoutines::_call_stub_return_address); | |
3225 StubRoutines::_catch_exception_entry = generate_catch_exception(); | |
3226 | |
3227 //------------------------------------------------------------------------------------------------------------------------ | |
3228 // entry points that are platform specific | |
3229 StubRoutines::Sparc::_test_stop_entry = generate_test_stop(); | |
3230 | |
3231 StubRoutines::Sparc::_stop_subroutine_entry = generate_stop_subroutine(); | |
3232 StubRoutines::Sparc::_flush_callers_register_windows_entry = generate_flush_callers_register_windows(); | |
3233 | |
3234 #if !defined(COMPILER2) && !defined(_LP64) | |
3235 StubRoutines::_atomic_xchg_entry = generate_atomic_xchg(); | |
3236 StubRoutines::_atomic_cmpxchg_entry = generate_atomic_cmpxchg(); | |
3237 StubRoutines::_atomic_add_entry = generate_atomic_add(); | |
3238 StubRoutines::_atomic_xchg_ptr_entry = StubRoutines::_atomic_xchg_entry; | |
3239 StubRoutines::_atomic_cmpxchg_ptr_entry = StubRoutines::_atomic_cmpxchg_entry; | |
3240 StubRoutines::_atomic_cmpxchg_long_entry = generate_atomic_cmpxchg_long(); | |
3241 StubRoutines::_atomic_add_ptr_entry = StubRoutines::_atomic_add_entry; | |
3242 #endif // COMPILER2 !=> _LP64 | |
3243 } | |
3244 | |
3245 | |
3246 void generate_all() { | |
3247 // Generates all stubs and initializes the entry points | |
3248 | |
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3249 // Generate partial_subtype_check first here since its code depends on |
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3250 // UseZeroBaseCompressedOops which is defined after heap initialization. |
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3251 StubRoutines::Sparc::_partial_subtype_check = generate_partial_subtype_check(); |
0 | 3252 // These entry points require SharedInfo::stack0 to be set up in non-core builds |
3253 StubRoutines::_throw_AbstractMethodError_entry = generate_throw_exception("AbstractMethodError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_AbstractMethodError), false); | |
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3254 StubRoutines::_throw_IncompatibleClassChangeError_entry= generate_throw_exception("IncompatibleClassChangeError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_IncompatibleClassChangeError), false); |
0 | 3255 StubRoutines::_throw_ArithmeticException_entry = generate_throw_exception("ArithmeticException throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_ArithmeticException), true); |
3256 StubRoutines::_throw_NullPointerException_entry = generate_throw_exception("NullPointerException throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException), true); | |
3257 StubRoutines::_throw_NullPointerException_at_call_entry= generate_throw_exception("NullPointerException at call throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException_at_call), false); | |
3258 StubRoutines::_throw_StackOverflowError_entry = generate_throw_exception("StackOverflowError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_StackOverflowError), false); | |
3259 | |
3260 StubRoutines::_handler_for_unsafe_access_entry = | |
3261 generate_handler_for_unsafe_access(); | |
3262 | |
3263 // support for verify_oop (must happen after universe_init) | |
3264 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop_subroutine(); | |
3265 | |
3266 // arraycopy stubs used by compilers | |
3267 generate_arraycopy_stubs(); | |
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3268 |
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3269 // Don't initialize the platform math functions since sparc |
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3270 // doesn't have intrinsics for these operations. |
0 | 3271 } |
3272 | |
3273 | |
3274 public: | |
3275 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) { | |
3276 // replace the standard masm with a special one: | |
3277 _masm = new MacroAssembler(code); | |
3278 | |
3279 _stub_count = !all ? 0x100 : 0x200; | |
3280 if (all) { | |
3281 generate_all(); | |
3282 } else { | |
3283 generate_initial(); | |
3284 } | |
3285 | |
3286 // make sure this stub is available for all local calls | |
3287 if (_atomic_add_stub.is_unbound()) { | |
3288 // generate a second time, if necessary | |
3289 (void) generate_atomic_add(); | |
3290 } | |
3291 } | |
3292 | |
3293 | |
3294 private: | |
3295 int _stub_count; | |
3296 void stub_prolog(StubCodeDesc* cdesc) { | |
3297 # ifdef ASSERT | |
3298 // put extra information in the stub code, to make it more readable | |
3299 #ifdef _LP64 | |
3300 // Write the high part of the address | |
3301 // [RGV] Check if there is a dependency on the size of this prolog | |
3302 __ emit_data((intptr_t)cdesc >> 32, relocInfo::none); | |
3303 #endif | |
3304 __ emit_data((intptr_t)cdesc, relocInfo::none); | |
3305 __ emit_data(++_stub_count, relocInfo::none); | |
3306 # endif | |
3307 align(true); | |
3308 } | |
3309 | |
3310 void align(bool at_header = false) { | |
3311 // %%%%% move this constant somewhere else | |
3312 // UltraSPARC cache line size is 8 instructions: | |
3313 const unsigned int icache_line_size = 32; | |
3314 const unsigned int icache_half_line_size = 16; | |
3315 | |
3316 if (at_header) { | |
3317 while ((intptr_t)(__ pc()) % icache_line_size != 0) { | |
3318 __ emit_data(0, relocInfo::none); | |
3319 } | |
3320 } else { | |
3321 while ((intptr_t)(__ pc()) % icache_half_line_size != 0) { | |
3322 __ nop(); | |
3323 } | |
3324 } | |
3325 } | |
3326 | |
3327 }; // end class declaration | |
3328 | |
3329 void StubGenerator_generate(CodeBuffer* code, bool all) { | |
3330 StubGenerator g(code, all); | |
3331 } |