Mercurial > hg > truffle
annotate src/cpu/sparc/vm/stubGenerator_sparc.cpp @ 3883:ce9bde819dcb hs22-b04
7086589: bump the hs22 build number to 04
Reviewed-by: johnc
Contributed-by: alejandro.murillo@oracle.com
author | jcoomes |
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date | Fri, 02 Sep 2011 03:49:30 -0700 |
parents | 3d42f82cd811 |
children | baf763f388e6 |
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); | |
3839 | 153 __ br_null_short(t, Assembler::pt, L); |
0 | 154 __ stop("StubRoutines::call_stub: entered with pending exception"); |
155 __ bind(L); | |
156 } | |
157 #endif | |
158 | |
159 // create activation frame & allocate space for parameters | |
160 { const Register t = G3_scratch; | |
161 __ ld_ptr(parameter_size.as_address(), t); // get parameter size (in words) | |
162 __ add(t, frame::memory_parameter_word_sp_offset, t); // add space for save area (in words) | |
163 __ round_to(t, WordsPerLong); // make sure it is multiple of 2 (in words) | |
1506 | 164 __ sll(t, Interpreter::logStackElementSize, t); // compute number of bytes |
0 | 165 __ neg(t); // negate so it can be used with save |
166 __ save(SP, t, SP); // setup new frame | |
167 } | |
168 | |
169 // +---------------+ <--- sp + 0 | |
170 // | | | |
171 // . reg save area . | |
172 // | | | |
173 // +---------------+ <--- sp + 0x40 | |
174 // | | | |
175 // . extra 7 slots . | |
176 // | | | |
177 // +---------------+ <--- sp + 0x5c | |
178 // | empty slot | (only if parameter size is even) | |
179 // +---------------+ | |
180 // | | | |
181 // . parameters . | |
182 // | | | |
183 // +---------------+ <--- fp + 0 | |
184 // | | | |
185 // . reg save area . | |
186 // | | | |
187 // +---------------+ <--- fp + 0x40 | |
188 // | | | |
189 // . extra 7 slots . | |
190 // | | | |
191 // +---------------+ <--- fp + 0x5c | |
192 // | param. size | | |
193 // +---------------+ <--- fp + 0x60 | |
194 // | thread | | |
195 // +---------------+ | |
196 // | | | |
197 | |
198 // pass parameters if any | |
199 BLOCK_COMMENT("pass parameters if any"); | |
200 { const Register src = parameters.as_in().as_register(); | |
201 const Register dst = Lentry_args; | |
202 const Register tmp = G3_scratch; | |
203 const Register cnt = G4_scratch; | |
204 | |
205 // test if any parameters & setup of Lentry_args | |
206 Label exit; | |
207 __ ld_ptr(parameter_size.as_in().as_address(), cnt); // parameter counter | |
208 __ add( FP, STACK_BIAS, dst ); | |
3839 | 209 __ cmp_zero_and_br(Assembler::zero, cnt, exit); |
0 | 210 __ delayed()->sub(dst, BytesPerWord, dst); // setup Lentry_args |
211 | |
212 // copy parameters if any | |
213 Label loop; | |
214 __ BIND(loop); | |
215 // Store parameter value | |
216 __ ld_ptr(src, 0, tmp); | |
217 __ add(src, BytesPerWord, src); | |
1506 | 218 __ st_ptr(tmp, dst, 0); |
0 | 219 __ deccc(cnt); |
220 __ br(Assembler::greater, false, Assembler::pt, loop); | |
1506 | 221 __ delayed()->sub(dst, Interpreter::stackElementSize, dst); |
0 | 222 |
223 // done | |
224 __ BIND(exit); | |
225 } | |
226 | |
227 // setup parameters, method & call Java function | |
228 #ifdef ASSERT | |
229 // layout_activation_impl checks it's notion of saved SP against | |
230 // this register, so if this changes update it as well. | |
231 const Register saved_SP = Lscratch; | |
232 __ mov(SP, saved_SP); // keep track of SP before call | |
233 #endif | |
234 | |
235 // setup parameters | |
236 const Register t = G3_scratch; | |
237 __ ld_ptr(parameter_size.as_in().as_address(), t); // get parameter size (in words) | |
1506 | 238 __ sll(t, Interpreter::logStackElementSize, t); // compute number of bytes |
0 | 239 __ sub(FP, t, Gargs); // setup parameter pointer |
240 #ifdef _LP64 | |
241 __ add( Gargs, STACK_BIAS, Gargs ); // Account for LP64 stack bias | |
242 #endif | |
243 __ mov(SP, O5_savedSP); | |
244 | |
245 | |
246 // do the call | |
247 // | |
248 // the following register must be setup: | |
249 // | |
250 // G2_thread | |
251 // G5_method | |
252 // Gargs | |
253 BLOCK_COMMENT("call Java function"); | |
254 __ jmpl(entry_point.as_in().as_register(), G0, O7); | |
255 __ delayed()->mov(method.as_in().as_register(), G5_method); // setup method | |
256 | |
257 BLOCK_COMMENT("call_stub_return_address:"); | |
258 return_pc = __ pc(); | |
259 | |
260 // The callee, if it wasn't interpreted, can return with SP changed so | |
261 // we can no longer assert of change of SP. | |
262 | |
263 // store result depending on type | |
264 // (everything that is not T_OBJECT, T_LONG, T_FLOAT, or T_DOUBLE | |
265 // is treated as T_INT) | |
266 { const Register addr = result .as_in().as_register(); | |
267 const Register type = result_type.as_in().as_register(); | |
268 Label is_long, is_float, is_double, is_object, exit; | |
269 __ cmp(type, T_OBJECT); __ br(Assembler::equal, false, Assembler::pn, is_object); | |
270 __ delayed()->cmp(type, T_FLOAT); __ br(Assembler::equal, false, Assembler::pn, is_float); | |
271 __ delayed()->cmp(type, T_DOUBLE); __ br(Assembler::equal, false, Assembler::pn, is_double); | |
272 __ delayed()->cmp(type, T_LONG); __ br(Assembler::equal, false, Assembler::pn, is_long); | |
273 __ delayed()->nop(); | |
274 | |
275 // store int result | |
276 __ st(O0, addr, G0); | |
277 | |
278 __ BIND(exit); | |
279 __ ret(); | |
280 __ delayed()->restore(); | |
281 | |
282 __ BIND(is_object); | |
3839 | 283 __ ba(exit); |
0 | 284 __ delayed()->st_ptr(O0, addr, G0); |
285 | |
286 __ BIND(is_float); | |
3839 | 287 __ ba(exit); |
0 | 288 __ delayed()->stf(FloatRegisterImpl::S, F0, addr, G0); |
289 | |
290 __ BIND(is_double); | |
3839 | 291 __ ba(exit); |
0 | 292 __ delayed()->stf(FloatRegisterImpl::D, F0, addr, G0); |
293 | |
294 __ BIND(is_long); | |
295 #ifdef _LP64 | |
3839 | 296 __ ba(exit); |
0 | 297 __ delayed()->st_long(O0, addr, G0); // store entire long |
298 #else | |
299 #if defined(COMPILER2) | |
300 // All return values are where we want them, except for Longs. C2 returns | |
301 // longs in G1 in the 32-bit build whereas the interpreter wants them in O0/O1. | |
302 // Since the interpreter will return longs in G1 and O0/O1 in the 32bit | |
303 // build we simply always use G1. | |
304 // Note: I tried to make c2 return longs in O0/O1 and G1 so we wouldn't have to | |
305 // do this here. Unfortunately if we did a rethrow we'd see an machepilog node | |
306 // first which would move g1 -> O0/O1 and destroy the exception we were throwing. | |
307 | |
3839 | 308 __ ba(exit); |
0 | 309 __ delayed()->stx(G1, addr, G0); // store entire long |
310 #else | |
311 __ st(O1, addr, BytesPerInt); | |
3839 | 312 __ ba(exit); |
0 | 313 __ delayed()->st(O0, addr, G0); |
314 #endif /* COMPILER2 */ | |
315 #endif /* _LP64 */ | |
316 } | |
317 return start; | |
318 } | |
319 | |
320 | |
321 //---------------------------------------------------------------------------------------------------- | |
322 // Return point for a Java call if there's an exception thrown in Java code. | |
323 // The exception is caught and transformed into a pending exception stored in | |
324 // JavaThread that can be tested from within the VM. | |
325 // | |
326 // Oexception: exception oop | |
327 | |
328 address generate_catch_exception() { | |
329 StubCodeMark mark(this, "StubRoutines", "catch_exception"); | |
330 | |
331 address start = __ pc(); | |
332 // verify that thread corresponds | |
333 __ verify_thread(); | |
334 | |
335 const Register& temp_reg = Gtemp; | |
727 | 336 Address pending_exception_addr (G2_thread, Thread::pending_exception_offset()); |
337 Address exception_file_offset_addr(G2_thread, Thread::exception_file_offset ()); | |
338 Address exception_line_offset_addr(G2_thread, Thread::exception_line_offset ()); | |
0 | 339 |
340 // set pending exception | |
341 __ verify_oop(Oexception); | |
342 __ st_ptr(Oexception, pending_exception_addr); | |
343 __ set((intptr_t)__FILE__, temp_reg); | |
344 __ st_ptr(temp_reg, exception_file_offset_addr); | |
345 __ set((intptr_t)__LINE__, temp_reg); | |
346 __ st(temp_reg, exception_line_offset_addr); | |
347 | |
348 // complete return to VM | |
349 assert(StubRoutines::_call_stub_return_address != NULL, "must have been generated before"); | |
350 | |
727 | 351 AddressLiteral stub_ret(StubRoutines::_call_stub_return_address); |
352 __ jump_to(stub_ret, temp_reg); | |
0 | 353 __ delayed()->nop(); |
354 | |
355 return start; | |
356 } | |
357 | |
358 | |
359 //---------------------------------------------------------------------------------------------------- | |
360 // Continuation point for runtime calls returning with a pending exception | |
361 // The pending exception check happened in the runtime or native call stub | |
362 // The pending exception in Thread is converted into a Java-level exception | |
363 // | |
364 // Contract with Java-level exception handler: O0 = exception | |
365 // O1 = throwing pc | |
366 | |
367 address generate_forward_exception() { | |
368 StubCodeMark mark(this, "StubRoutines", "forward_exception"); | |
369 address start = __ pc(); | |
370 | |
371 // Upon entry, O7 has the return address returning into Java | |
372 // (interpreted or compiled) code; i.e. the return address | |
373 // becomes the throwing pc. | |
374 | |
375 const Register& handler_reg = Gtemp; | |
376 | |
727 | 377 Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
0 | 378 |
379 #ifdef ASSERT | |
380 // make sure that this code is only executed if there is a pending exception | |
381 { Label L; | |
382 __ ld_ptr(exception_addr, Gtemp); | |
3839 | 383 __ br_notnull_short(Gtemp, Assembler::pt, L); |
0 | 384 __ stop("StubRoutines::forward exception: no pending exception (1)"); |
385 __ bind(L); | |
386 } | |
387 #endif | |
388 | |
389 // compute exception handler into handler_reg | |
390 __ get_thread(); | |
391 __ ld_ptr(exception_addr, Oexception); | |
392 __ verify_oop(Oexception); | |
393 __ save_frame(0); // compensates for compiler weakness | |
394 __ add(O7->after_save(), frame::pc_return_offset, Lscratch); // save the issuing PC | |
395 BLOCK_COMMENT("call exception_handler_for_return_address"); | |
1295 | 396 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), G2_thread, Lscratch); |
0 | 397 __ mov(O0, handler_reg); |
398 __ restore(); // compensates for compiler weakness | |
399 | |
400 __ ld_ptr(exception_addr, Oexception); | |
401 __ add(O7, frame::pc_return_offset, Oissuing_pc); // save the issuing PC | |
402 | |
403 #ifdef ASSERT | |
404 // make sure exception is set | |
405 { Label L; | |
3839 | 406 __ br_notnull_short(Oexception, Assembler::pt, L); |
0 | 407 __ stop("StubRoutines::forward exception: no pending exception (2)"); |
408 __ bind(L); | |
409 } | |
410 #endif | |
411 // jump to exception handler | |
412 __ jmp(handler_reg, 0); | |
413 // clear pending exception | |
414 __ delayed()->st_ptr(G0, exception_addr); | |
415 | |
416 return start; | |
417 } | |
418 | |
419 | |
420 //------------------------------------------------------------------------------------------------------------------------ | |
421 // Continuation point for throwing of implicit exceptions that are not handled in | |
422 // the current activation. Fabricates an exception oop and initiates normal | |
423 // exception dispatching in this frame. Only callee-saved registers are preserved | |
424 // (through the normal register window / RegisterMap handling). | |
425 // If the compiler needs all registers to be preserved between the fault | |
426 // point and the exception handler then it must assume responsibility for that in | |
427 // AbstractCompiler::continuation_for_implicit_null_exception or | |
428 // continuation_for_implicit_division_by_zero_exception. All other implicit | |
429 // exceptions (e.g., NullPointerException or AbstractMethodError on entry) are | |
430 // either at call sites or otherwise assume that stack unwinding will be initiated, | |
431 // so caller saved registers were assumed volatile in the compiler. | |
432 | |
433 // Note that we generate only this stub into a RuntimeStub, because it needs to be | |
434 // properly traversed and ignored during GC, so we change the meaning of the "__" | |
435 // macro within this method. | |
436 #undef __ | |
437 #define __ masm-> | |
438 | |
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439 address generate_throw_exception(const char* name, address runtime_entry, bool restore_saved_exception_pc, |
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440 Register arg1 = noreg, Register arg2 = noreg) { |
0 | 441 #ifdef ASSERT |
442 int insts_size = VerifyThread ? 1 * K : 600; | |
443 #else | |
444 int insts_size = VerifyThread ? 1 * K : 256; | |
445 #endif /* ASSERT */ | |
446 int locs_size = 32; | |
447 | |
448 CodeBuffer code(name, insts_size, locs_size); | |
449 MacroAssembler* masm = new MacroAssembler(&code); | |
450 | |
451 __ verify_thread(); | |
452 | |
453 // This is an inlined and slightly modified version of call_VM | |
454 // which has the ability to fetch the return PC out of thread-local storage | |
455 __ assert_not_delayed(); | |
456 | |
457 // Note that we always push a frame because on the SPARC | |
458 // architecture, for all of our implicit exception kinds at call | |
459 // sites, the implicit exception is taken before the callee frame | |
460 // is pushed. | |
461 __ save_frame(0); | |
462 | |
463 int frame_complete = __ offset(); | |
464 | |
465 if (restore_saved_exception_pc) { | |
727 | 466 __ ld_ptr(G2_thread, JavaThread::saved_exception_pc_offset(), I7); |
0 | 467 __ sub(I7, frame::pc_return_offset, I7); |
468 } | |
469 | |
470 // Note that we always have a runtime stub frame on the top of stack by this point | |
471 Register last_java_sp = SP; | |
472 // 64-bit last_java_sp is biased! | |
473 __ set_last_Java_frame(last_java_sp, G0); | |
474 if (VerifyThread) __ mov(G2_thread, O0); // about to be smashed; pass early | |
475 __ save_thread(noreg); | |
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476 if (arg1 != noreg) { |
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477 assert(arg2 != O1, "clobbered"); |
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478 __ mov(arg1, O1); |
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479 } |
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480 if (arg2 != noreg) { |
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481 __ mov(arg2, O2); |
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482 } |
0 | 483 // do the call |
484 BLOCK_COMMENT("call runtime_entry"); | |
485 __ call(runtime_entry, relocInfo::runtime_call_type); | |
486 if (!VerifyThread) | |
487 __ delayed()->mov(G2_thread, O0); // pass thread as first argument | |
488 else | |
489 __ delayed()->nop(); // (thread already passed) | |
490 __ restore_thread(noreg); | |
491 __ reset_last_Java_frame(); | |
492 | |
493 // check for pending exceptions. use Gtemp as scratch register. | |
494 #ifdef ASSERT | |
495 Label L; | |
496 | |
727 | 497 Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
0 | 498 Register scratch_reg = Gtemp; |
499 __ ld_ptr(exception_addr, scratch_reg); | |
3839 | 500 __ br_notnull_short(scratch_reg, Assembler::pt, L); |
0 | 501 __ should_not_reach_here(); |
502 __ bind(L); | |
503 #endif // ASSERT | |
504 BLOCK_COMMENT("call forward_exception_entry"); | |
505 __ call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type); | |
506 // we use O7 linkage so that forward_exception_entry has the issuing PC | |
507 __ delayed()->restore(); | |
508 | |
509 RuntimeStub* stub = RuntimeStub::new_runtime_stub(name, &code, frame_complete, masm->total_frame_size_in_bytes(0), NULL, false); | |
510 return stub->entry_point(); | |
511 } | |
512 | |
513 #undef __ | |
514 #define __ _masm-> | |
515 | |
516 | |
517 // Generate a routine that sets all the registers so we | |
518 // can tell if the stop routine prints them correctly. | |
519 address generate_test_stop() { | |
520 StubCodeMark mark(this, "StubRoutines", "test_stop"); | |
521 address start = __ pc(); | |
522 | |
523 int i; | |
524 | |
525 __ save_frame(0); | |
526 | |
527 static jfloat zero = 0.0, one = 1.0; | |
528 | |
529 // put addr in L0, then load through L0 to F0 | |
530 __ set((intptr_t)&zero, L0); __ ldf( FloatRegisterImpl::S, L0, 0, F0); | |
531 __ set((intptr_t)&one, L0); __ ldf( FloatRegisterImpl::S, L0, 0, F1); // 1.0 to F1 | |
532 | |
533 // use add to put 2..18 in F2..F18 | |
534 for ( i = 2; i <= 18; ++i ) { | |
535 __ fadd( FloatRegisterImpl::S, F1, as_FloatRegister(i-1), as_FloatRegister(i)); | |
536 } | |
537 | |
538 // Now put double 2 in F16, double 18 in F18 | |
539 __ ftof( FloatRegisterImpl::S, FloatRegisterImpl::D, F2, F16 ); | |
540 __ ftof( FloatRegisterImpl::S, FloatRegisterImpl::D, F18, F18 ); | |
541 | |
542 // use add to put 20..32 in F20..F32 | |
543 for (i = 20; i < 32; i += 2) { | |
544 __ fadd( FloatRegisterImpl::D, F16, as_FloatRegister(i-2), as_FloatRegister(i)); | |
545 } | |
546 | |
547 // put 0..7 in i's, 8..15 in l's, 16..23 in o's, 24..31 in g's | |
548 for ( i = 0; i < 8; ++i ) { | |
549 if (i < 6) { | |
550 __ set( i, as_iRegister(i)); | |
551 __ set(16 + i, as_oRegister(i)); | |
552 __ set(24 + i, as_gRegister(i)); | |
553 } | |
554 __ set( 8 + i, as_lRegister(i)); | |
555 } | |
556 | |
557 __ stop("testing stop"); | |
558 | |
559 | |
560 __ ret(); | |
561 __ delayed()->restore(); | |
562 | |
563 return start; | |
564 } | |
565 | |
566 | |
567 address generate_stop_subroutine() { | |
568 StubCodeMark mark(this, "StubRoutines", "stop_subroutine"); | |
569 address start = __ pc(); | |
570 | |
571 __ stop_subroutine(); | |
572 | |
573 return start; | |
574 } | |
575 | |
576 address generate_flush_callers_register_windows() { | |
577 StubCodeMark mark(this, "StubRoutines", "flush_callers_register_windows"); | |
578 address start = __ pc(); | |
579 | |
580 __ flush_windows(); | |
581 __ retl(false); | |
582 __ delayed()->add( FP, STACK_BIAS, O0 ); | |
583 // The returned value must be a stack pointer whose register save area | |
584 // is flushed, and will stay flushed while the caller executes. | |
585 | |
586 return start; | |
587 } | |
588 | |
589 // Helper functions for v8 atomic operations. | |
590 // | |
591 void get_v8_oop_lock_ptr(Register lock_ptr_reg, Register mark_oop_reg, Register scratch_reg) { | |
592 if (mark_oop_reg == noreg) { | |
593 address lock_ptr = (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(); | |
594 __ set((intptr_t)lock_ptr, lock_ptr_reg); | |
595 } else { | |
596 assert(scratch_reg != noreg, "just checking"); | |
597 address lock_ptr = (address)StubRoutines::Sparc::_v8_oop_lock_cache; | |
598 __ set((intptr_t)lock_ptr, lock_ptr_reg); | |
599 __ and3(mark_oop_reg, StubRoutines::Sparc::v8_oop_lock_mask_in_place, scratch_reg); | |
600 __ add(lock_ptr_reg, scratch_reg, lock_ptr_reg); | |
601 } | |
602 } | |
603 | |
604 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) { | |
605 | |
606 get_v8_oop_lock_ptr(lock_ptr_reg, mark_oop_reg, scratch_reg); | |
607 __ set(StubRoutines::Sparc::locked, lock_reg); | |
608 // Initialize yield counter | |
609 __ mov(G0,yield_reg); | |
610 | |
611 __ BIND(retry); | |
3839 | 612 __ cmp_and_br_short(yield_reg, V8AtomicOperationUnderLockSpinCount, Assembler::less, Assembler::pt, dontyield); |
0 | 613 |
614 // This code can only be called from inside the VM, this | |
615 // stub is only invoked from Atomic::add(). We do not | |
616 // want to use call_VM, because _last_java_sp and such | |
617 // must already be set. | |
618 // | |
619 // Save the regs and make space for a C call | |
620 __ save(SP, -96, SP); | |
621 __ save_all_globals_into_locals(); | |
622 BLOCK_COMMENT("call os::naked_sleep"); | |
623 __ call(CAST_FROM_FN_PTR(address, os::naked_sleep)); | |
624 __ delayed()->nop(); | |
625 __ restore_globals_from_locals(); | |
626 __ restore(); | |
627 // reset the counter | |
628 __ mov(G0,yield_reg); | |
629 | |
630 __ BIND(dontyield); | |
631 | |
632 // try to get lock | |
633 __ swap(lock_ptr_reg, 0, lock_reg); | |
634 | |
635 // did we get the lock? | |
636 __ cmp(lock_reg, StubRoutines::Sparc::unlocked); | |
637 __ br(Assembler::notEqual, true, Assembler::pn, retry); | |
638 __ delayed()->add(yield_reg,1,yield_reg); | |
639 | |
640 // yes, got lock. do the operation here. | |
641 } | |
642 | |
643 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) { | |
644 __ st(lock_reg, lock_ptr_reg, 0); // unlock | |
645 } | |
646 | |
647 // Support for jint Atomic::xchg(jint exchange_value, volatile jint* dest). | |
648 // | |
649 // Arguments : | |
650 // | |
651 // exchange_value: O0 | |
652 // dest: O1 | |
653 // | |
654 // Results: | |
655 // | |
656 // O0: the value previously stored in dest | |
657 // | |
658 address generate_atomic_xchg() { | |
659 StubCodeMark mark(this, "StubRoutines", "atomic_xchg"); | |
660 address start = __ pc(); | |
661 | |
662 if (UseCASForSwap) { | |
663 // Use CAS instead of swap, just in case the MP hardware | |
664 // prefers to work with just one kind of synch. instruction. | |
665 Label retry; | |
666 __ BIND(retry); | |
667 __ mov(O0, O3); // scratch copy of exchange value | |
668 __ ld(O1, 0, O2); // observe the previous value | |
669 // try to replace O2 with O3 | |
670 __ cas_under_lock(O1, O2, O3, | |
671 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(),false); | |
3839 | 672 __ cmp_and_br_short(O2, O3, Assembler::notEqual, Assembler::pn, retry); |
0 | 673 |
674 __ retl(false); | |
675 __ delayed()->mov(O2, O0); // report previous value to caller | |
676 | |
677 } else { | |
678 if (VM_Version::v9_instructions_work()) { | |
679 __ retl(false); | |
680 __ delayed()->swap(O1, 0, O0); | |
681 } else { | |
682 const Register& lock_reg = O2; | |
683 const Register& lock_ptr_reg = O3; | |
684 const Register& yield_reg = O4; | |
685 | |
686 Label retry; | |
687 Label dontyield; | |
688 | |
689 generate_v8_lock_prologue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
690 // got the lock, do the swap | |
691 __ swap(O1, 0, O0); | |
692 | |
693 generate_v8_lock_epilogue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
694 __ retl(false); | |
695 __ delayed()->nop(); | |
696 } | |
697 } | |
698 | |
699 return start; | |
700 } | |
701 | |
702 | |
703 // Support for jint Atomic::cmpxchg(jint exchange_value, volatile jint* dest, jint compare_value) | |
704 // | |
705 // Arguments : | |
706 // | |
707 // exchange_value: O0 | |
708 // dest: O1 | |
709 // compare_value: O2 | |
710 // | |
711 // Results: | |
712 // | |
713 // O0: the value previously stored in dest | |
714 // | |
715 // Overwrites (v8): O3,O4,O5 | |
716 // | |
717 address generate_atomic_cmpxchg() { | |
718 StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg"); | |
719 address start = __ pc(); | |
720 | |
721 // cmpxchg(dest, compare_value, exchange_value) | |
722 __ cas_under_lock(O1, O2, O0, | |
723 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(),false); | |
724 __ retl(false); | |
725 __ delayed()->nop(); | |
726 | |
727 return start; | |
728 } | |
729 | |
730 // Support for jlong Atomic::cmpxchg(jlong exchange_value, volatile jlong *dest, jlong compare_value) | |
731 // | |
732 // Arguments : | |
733 // | |
734 // exchange_value: O1:O0 | |
735 // dest: O2 | |
736 // compare_value: O4:O3 | |
737 // | |
738 // Results: | |
739 // | |
740 // O1:O0: the value previously stored in dest | |
741 // | |
742 // This only works on V9, on V8 we don't generate any | |
743 // code and just return NULL. | |
744 // | |
745 // Overwrites: G1,G2,G3 | |
746 // | |
747 address generate_atomic_cmpxchg_long() { | |
748 StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg_long"); | |
749 address start = __ pc(); | |
750 | |
751 if (!VM_Version::supports_cx8()) | |
752 return NULL;; | |
753 __ sllx(O0, 32, O0); | |
754 __ srl(O1, 0, O1); | |
755 __ or3(O0,O1,O0); // O0 holds 64-bit value from compare_value | |
756 __ sllx(O3, 32, O3); | |
757 __ srl(O4, 0, O4); | |
758 __ or3(O3,O4,O3); // O3 holds 64-bit value from exchange_value | |
759 __ casx(O2, O3, O0); | |
760 __ srl(O0, 0, O1); // unpacked return value in O1:O0 | |
761 __ retl(false); | |
762 __ delayed()->srlx(O0, 32, O0); | |
763 | |
764 return start; | |
765 } | |
766 | |
767 | |
768 // Support for jint Atomic::add(jint add_value, volatile jint* dest). | |
769 // | |
770 // Arguments : | |
771 // | |
772 // add_value: O0 (e.g., +1 or -1) | |
773 // dest: O1 | |
774 // | |
775 // Results: | |
776 // | |
777 // O0: the new value stored in dest | |
778 // | |
779 // Overwrites (v9): O3 | |
780 // Overwrites (v8): O3,O4,O5 | |
781 // | |
782 address generate_atomic_add() { | |
783 StubCodeMark mark(this, "StubRoutines", "atomic_add"); | |
784 address start = __ pc(); | |
785 __ BIND(_atomic_add_stub); | |
786 | |
787 if (VM_Version::v9_instructions_work()) { | |
788 Label(retry); | |
789 __ BIND(retry); | |
790 | |
791 __ lduw(O1, 0, O2); | |
3839 | 792 __ add(O0, O2, O3); |
793 __ cas(O1, O2, O3); | |
794 __ cmp_and_br_short(O2, O3, Assembler::notEqual, Assembler::pn, retry); | |
0 | 795 __ retl(false); |
796 __ delayed()->add(O0, O2, O0); // note that cas made O2==O3 | |
797 } else { | |
798 const Register& lock_reg = O2; | |
799 const Register& lock_ptr_reg = O3; | |
800 const Register& value_reg = O4; | |
801 const Register& yield_reg = O5; | |
802 | |
803 Label(retry); | |
804 Label(dontyield); | |
805 | |
806 generate_v8_lock_prologue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
807 // got lock, do the increment | |
808 __ ld(O1, 0, value_reg); | |
809 __ add(O0, value_reg, value_reg); | |
810 __ st(value_reg, O1, 0); | |
811 | |
812 // %%% only for RMO and PSO | |
813 __ membar(Assembler::StoreStore); | |
814 | |
815 generate_v8_lock_epilogue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
816 | |
817 __ retl(false); | |
818 __ delayed()->mov(value_reg, O0); | |
819 } | |
820 | |
821 return start; | |
822 } | |
823 Label _atomic_add_stub; // called from other stubs | |
824 | |
825 | |
826 //------------------------------------------------------------------------------------------------------------------------ | |
827 // The following routine generates a subroutine to throw an asynchronous | |
828 // UnknownError when an unsafe access gets a fault that could not be | |
829 // reasonably prevented by the programmer. (Example: SIGBUS/OBJERR.) | |
830 // | |
831 // Arguments : | |
832 // | |
833 // trapping PC: O7 | |
834 // | |
835 // Results: | |
836 // posts an asynchronous exception, skips the trapping instruction | |
837 // | |
838 | |
839 address generate_handler_for_unsafe_access() { | |
840 StubCodeMark mark(this, "StubRoutines", "handler_for_unsafe_access"); | |
841 address start = __ pc(); | |
842 | |
843 const int preserve_register_words = (64 * 2); | |
727 | 844 Address preserve_addr(FP, (-preserve_register_words * wordSize) + STACK_BIAS); |
0 | 845 |
846 Register Lthread = L7_thread_cache; | |
847 int i; | |
848 | |
849 __ save_frame(0); | |
850 __ mov(G1, L1); | |
851 __ mov(G2, L2); | |
852 __ mov(G3, L3); | |
853 __ mov(G4, L4); | |
854 __ mov(G5, L5); | |
855 for (i = 0; i < (VM_Version::v9_instructions_work() ? 64 : 32); i += 2) { | |
856 __ stf(FloatRegisterImpl::D, as_FloatRegister(i), preserve_addr, i * wordSize); | |
857 } | |
858 | |
859 address entry_point = CAST_FROM_FN_PTR(address, handle_unsafe_access); | |
860 BLOCK_COMMENT("call handle_unsafe_access"); | |
861 __ call(entry_point, relocInfo::runtime_call_type); | |
862 __ delayed()->nop(); | |
863 | |
864 __ mov(L1, G1); | |
865 __ mov(L2, G2); | |
866 __ mov(L3, G3); | |
867 __ mov(L4, G4); | |
868 __ mov(L5, G5); | |
869 for (i = 0; i < (VM_Version::v9_instructions_work() ? 64 : 32); i += 2) { | |
870 __ ldf(FloatRegisterImpl::D, preserve_addr, as_FloatRegister(i), i * wordSize); | |
871 } | |
872 | |
873 __ verify_thread(); | |
874 | |
875 __ jmp(O0, 0); | |
876 __ delayed()->restore(); | |
877 | |
878 return start; | |
879 } | |
880 | |
881 | |
882 // Support for uint StubRoutine::Sparc::partial_subtype_check( Klass sub, Klass super ); | |
883 // Arguments : | |
884 // | |
885 // ret : O0, returned | |
886 // icc/xcc: set as O0 (depending on wordSize) | |
887 // sub : O1, argument, not changed | |
888 // super: O2, argument, not changed | |
889 // raddr: O7, blown by call | |
890 address generate_partial_subtype_check() { | |
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891 __ align(CodeEntryAlignment); |
0 | 892 StubCodeMark mark(this, "StubRoutines", "partial_subtype_check"); |
893 address start = __ pc(); | |
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894 Label miss; |
0 | 895 |
896 #if defined(COMPILER2) && !defined(_LP64) | |
897 // Do not use a 'save' because it blows the 64-bit O registers. | |
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898 __ add(SP,-4*wordSize,SP); // Make space for 4 temps (stack must be 2 words aligned) |
0 | 899 __ st_ptr(L0,SP,(frame::register_save_words+0)*wordSize); |
900 __ st_ptr(L1,SP,(frame::register_save_words+1)*wordSize); | |
901 __ st_ptr(L2,SP,(frame::register_save_words+2)*wordSize); | |
902 __ st_ptr(L3,SP,(frame::register_save_words+3)*wordSize); | |
903 Register Rret = O0; | |
904 Register Rsub = O1; | |
905 Register Rsuper = O2; | |
906 #else | |
907 __ save_frame(0); | |
908 Register Rret = I0; | |
909 Register Rsub = I1; | |
910 Register Rsuper = I2; | |
911 #endif | |
912 | |
913 Register L0_ary_len = L0; | |
914 Register L1_ary_ptr = L1; | |
915 Register L2_super = L2; | |
916 Register L3_index = L3; | |
917 | |
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918 __ check_klass_subtype_slow_path(Rsub, Rsuper, |
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919 L0, L1, L2, L3, |
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920 NULL, &miss); |
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921 |
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922 // Match falls through here. |
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923 __ addcc(G0,0,Rret); // set Z flags, Z result |
0 | 924 |
925 #if defined(COMPILER2) && !defined(_LP64) | |
926 __ ld_ptr(SP,(frame::register_save_words+0)*wordSize,L0); | |
927 __ ld_ptr(SP,(frame::register_save_words+1)*wordSize,L1); | |
928 __ ld_ptr(SP,(frame::register_save_words+2)*wordSize,L2); | |
929 __ ld_ptr(SP,(frame::register_save_words+3)*wordSize,L3); | |
930 __ retl(); // Result in Rret is zero; flags set to Z | |
931 __ delayed()->add(SP,4*wordSize,SP); | |
932 #else | |
933 __ ret(); // Result in Rret is zero; flags set to Z | |
934 __ delayed()->restore(); | |
935 #endif | |
936 | |
937 __ BIND(miss); | |
938 __ addcc(G0,1,Rret); // set NZ flags, NZ result | |
939 | |
940 #if defined(COMPILER2) && !defined(_LP64) | |
941 __ ld_ptr(SP,(frame::register_save_words+0)*wordSize,L0); | |
942 __ ld_ptr(SP,(frame::register_save_words+1)*wordSize,L1); | |
943 __ ld_ptr(SP,(frame::register_save_words+2)*wordSize,L2); | |
944 __ ld_ptr(SP,(frame::register_save_words+3)*wordSize,L3); | |
945 __ retl(); // Result in Rret is != 0; flags set to NZ | |
946 __ delayed()->add(SP,4*wordSize,SP); | |
947 #else | |
948 __ ret(); // Result in Rret is != 0; flags set to NZ | |
949 __ delayed()->restore(); | |
950 #endif | |
951 | |
952 return start; | |
953 } | |
954 | |
955 | |
956 // Called from MacroAssembler::verify_oop | |
957 // | |
958 address generate_verify_oop_subroutine() { | |
959 StubCodeMark mark(this, "StubRoutines", "verify_oop_stub"); | |
960 | |
961 address start = __ pc(); | |
962 | |
963 __ verify_oop_subroutine(); | |
964 | |
965 return start; | |
966 } | |
967 | |
968 | |
969 // | |
970 // Verify that a register contains clean 32-bits positive value | |
971 // (high 32-bits are 0) so it could be used in 64-bits shifts (sllx, srax). | |
972 // | |
973 // Input: | |
974 // Rint - 32-bits value | |
975 // Rtmp - scratch | |
976 // | |
977 void assert_clean_int(Register Rint, Register Rtmp) { | |
978 #if defined(ASSERT) && defined(_LP64) | |
979 __ signx(Rint, Rtmp); | |
980 __ cmp(Rint, Rtmp); | |
981 __ breakpoint_trap(Assembler::notEqual, Assembler::xcc); | |
982 #endif | |
983 } | |
984 | |
985 // | |
986 // Generate overlap test for array copy stubs | |
987 // | |
988 // Input: | |
989 // O0 - array1 | |
990 // O1 - array2 | |
991 // O2 - element count | |
992 // | |
993 // Kills temps: O3, O4 | |
994 // | |
995 void array_overlap_test(address no_overlap_target, int log2_elem_size) { | |
996 assert(no_overlap_target != NULL, "must be generated"); | |
997 array_overlap_test(no_overlap_target, NULL, log2_elem_size); | |
998 } | |
999 void array_overlap_test(Label& L_no_overlap, int log2_elem_size) { | |
1000 array_overlap_test(NULL, &L_no_overlap, log2_elem_size); | |
1001 } | |
1002 void array_overlap_test(address no_overlap_target, Label* NOLp, int log2_elem_size) { | |
1003 const Register from = O0; | |
1004 const Register to = O1; | |
1005 const Register count = O2; | |
1006 const Register to_from = O3; // to - from | |
1007 const Register byte_count = O4; // count << log2_elem_size | |
1008 | |
1009 __ subcc(to, from, to_from); | |
1010 __ sll_ptr(count, log2_elem_size, byte_count); | |
1011 if (NOLp == NULL) | |
1012 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, no_overlap_target); | |
1013 else | |
1014 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, (*NOLp)); | |
1015 __ delayed()->cmp(to_from, byte_count); | |
1016 if (NOLp == NULL) | |
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1017 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, no_overlap_target); |
0 | 1018 else |
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1019 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, (*NOLp)); |
0 | 1020 __ delayed()->nop(); |
1021 } | |
1022 | |
1023 // | |
1024 // Generate pre-write barrier for array. | |
1025 // | |
1026 // Input: | |
1027 // addr - register containing starting address | |
1028 // count - register containing element count | |
1029 // tmp - scratch register | |
1030 // | |
1031 // The input registers are overwritten. | |
1032 // | |
2324 | 1033 void gen_write_ref_array_pre_barrier(Register addr, Register count, bool dest_uninitialized) { |
0 | 1034 BarrierSet* bs = Universe::heap()->barrier_set(); |
2324 | 1035 switch (bs->kind()) { |
1036 case BarrierSet::G1SATBCT: | |
1037 case BarrierSet::G1SATBCTLogging: | |
1038 // With G1, don't generate the call if we statically know that the target in uninitialized | |
1039 if (!dest_uninitialized) { | |
1040 __ save_frame(0); | |
1041 // Save the necessary global regs... will be used after. | |
1042 if (addr->is_global()) { | |
1043 __ mov(addr, L0); | |
1044 } | |
1045 if (count->is_global()) { | |
1046 __ mov(count, L1); | |
1047 } | |
1048 __ mov(addr->after_save(), O0); | |
1049 // Get the count into O1 | |
1050 __ call(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_pre)); | |
1051 __ delayed()->mov(count->after_save(), O1); | |
1052 if (addr->is_global()) { | |
1053 __ mov(L0, addr); | |
1054 } | |
1055 if (count->is_global()) { | |
1056 __ mov(L1, count); | |
1057 } | |
1058 __ restore(); | |
1059 } | |
1060 break; | |
1061 case BarrierSet::CardTableModRef: | |
1062 case BarrierSet::CardTableExtension: | |
1063 case BarrierSet::ModRef: | |
1064 break; | |
1065 default: | |
1066 ShouldNotReachHere(); | |
0 | 1067 } |
1068 } | |
1069 // | |
1070 // Generate post-write barrier for array. | |
1071 // | |
1072 // Input: | |
1073 // addr - register containing starting address | |
1074 // count - register containing element count | |
1075 // tmp - scratch register | |
1076 // | |
1077 // The input registers are overwritten. | |
1078 // | |
1079 void gen_write_ref_array_post_barrier(Register addr, Register count, | |
2324 | 1080 Register tmp) { |
0 | 1081 BarrierSet* bs = Universe::heap()->barrier_set(); |
1082 | |
1083 switch (bs->kind()) { | |
1084 case BarrierSet::G1SATBCT: | |
1085 case BarrierSet::G1SATBCTLogging: | |
1086 { | |
1087 // Get some new fresh output registers. | |
1088 __ save_frame(0); | |
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1089 __ mov(addr->after_save(), O0); |
0 | 1090 __ call(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_post)); |
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1091 __ delayed()->mov(count->after_save(), O1); |
0 | 1092 __ restore(); |
1093 } | |
1094 break; | |
1095 case BarrierSet::CardTableModRef: | |
1096 case BarrierSet::CardTableExtension: | |
1097 { | |
1098 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | |
1099 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); | |
1100 assert_different_registers(addr, count, tmp); | |
1101 | |
1102 Label L_loop; | |
1103 | |
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1104 __ sll_ptr(count, LogBytesPerHeapOop, count); |
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1105 __ sub(count, BytesPerHeapOop, count); |
0 | 1106 __ add(count, addr, count); |
1107 // Use two shifts to clear out those low order two bits! (Cannot opt. into 1.) | |
1108 __ srl_ptr(addr, CardTableModRefBS::card_shift, addr); | |
1109 __ srl_ptr(count, CardTableModRefBS::card_shift, count); | |
1110 __ sub(count, addr, count); | |
727 | 1111 AddressLiteral rs(ct->byte_map_base); |
1112 __ set(rs, tmp); | |
0 | 1113 __ BIND(L_loop); |
727 | 1114 __ stb(G0, tmp, addr); |
0 | 1115 __ subcc(count, 1, count); |
1116 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
1117 __ delayed()->add(addr, 1, addr); | |
727 | 1118 } |
0 | 1119 break; |
1120 case BarrierSet::ModRef: | |
1121 break; | |
727 | 1122 default: |
0 | 1123 ShouldNotReachHere(); |
1124 } | |
1125 } | |
1126 | |
1127 | |
1128 // Copy big chunks forward with shift | |
1129 // | |
1130 // Inputs: | |
1131 // from - source arrays | |
1132 // to - destination array aligned to 8-bytes | |
1133 // count - elements count to copy >= the count equivalent to 16 bytes | |
1134 // count_dec - elements count's decrement equivalent to 16 bytes | |
1135 // L_copy_bytes - copy exit label | |
1136 // | |
1137 void copy_16_bytes_forward_with_shift(Register from, Register to, | |
1138 Register count, int count_dec, Label& L_copy_bytes) { | |
1139 Label L_loop, L_aligned_copy, L_copy_last_bytes; | |
1140 | |
1141 // if both arrays have the same alignment mod 8, do 8 bytes aligned copy | |
1142 __ andcc(from, 7, G1); // misaligned bytes | |
1143 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
1144 __ delayed()->nop(); | |
1145 | |
1146 const Register left_shift = G1; // left shift bit counter | |
1147 const Register right_shift = G5; // right shift bit counter | |
1148 | |
1149 __ sll(G1, LogBitsPerByte, left_shift); | |
1150 __ mov(64, right_shift); | |
1151 __ sub(right_shift, left_shift, right_shift); | |
1152 | |
1153 // | |
1154 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
1155 // to form 2 aligned 8-bytes chunks to store. | |
1156 // | |
1157 __ deccc(count, count_dec); // Pre-decrement 'count' | |
1158 __ andn(from, 7, from); // Align address | |
1159 __ ldx(from, 0, O3); | |
1160 __ inc(from, 8); | |
1365 | 1161 __ align(OptoLoopAlignment); |
0 | 1162 __ BIND(L_loop); |
1163 __ ldx(from, 0, O4); | |
1164 __ deccc(count, count_dec); // Can we do next iteration after this one? | |
1165 __ ldx(from, 8, G4); | |
1166 __ inc(to, 16); | |
1167 __ inc(from, 16); | |
1168 __ sllx(O3, left_shift, O3); | |
1169 __ srlx(O4, right_shift, G3); | |
1170 __ bset(G3, O3); | |
1171 __ stx(O3, to, -16); | |
1172 __ sllx(O4, left_shift, O4); | |
1173 __ srlx(G4, right_shift, G3); | |
1174 __ bset(G3, O4); | |
1175 __ stx(O4, to, -8); | |
1176 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
1177 __ delayed()->mov(G4, O3); | |
1178 | |
1179 __ inccc(count, count_dec>>1 ); // + 8 bytes | |
1180 __ brx(Assembler::negative, true, Assembler::pn, L_copy_last_bytes); | |
1181 __ delayed()->inc(count, count_dec>>1); // restore 'count' | |
1182 | |
1183 // copy 8 bytes, part of them already loaded in O3 | |
1184 __ ldx(from, 0, O4); | |
1185 __ inc(to, 8); | |
1186 __ inc(from, 8); | |
1187 __ sllx(O3, left_shift, O3); | |
1188 __ srlx(O4, right_shift, G3); | |
1189 __ bset(O3, G3); | |
1190 __ stx(G3, to, -8); | |
1191 | |
1192 __ BIND(L_copy_last_bytes); | |
1193 __ srl(right_shift, LogBitsPerByte, right_shift); // misaligned bytes | |
1194 __ br(Assembler::always, false, Assembler::pt, L_copy_bytes); | |
1195 __ delayed()->sub(from, right_shift, from); // restore address | |
1196 | |
1197 __ BIND(L_aligned_copy); | |
1198 } | |
1199 | |
1200 // Copy big chunks backward with shift | |
1201 // | |
1202 // Inputs: | |
1203 // end_from - source arrays end address | |
1204 // end_to - destination array end address aligned to 8-bytes | |
1205 // count - elements count to copy >= the count equivalent to 16 bytes | |
1206 // count_dec - elements count's decrement equivalent to 16 bytes | |
1207 // L_aligned_copy - aligned copy exit label | |
1208 // L_copy_bytes - copy exit label | |
1209 // | |
1210 void copy_16_bytes_backward_with_shift(Register end_from, Register end_to, | |
1211 Register count, int count_dec, | |
1212 Label& L_aligned_copy, Label& L_copy_bytes) { | |
1213 Label L_loop, L_copy_last_bytes; | |
1214 | |
1215 // if both arrays have the same alignment mod 8, do 8 bytes aligned copy | |
1216 __ andcc(end_from, 7, G1); // misaligned bytes | |
1217 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
1218 __ delayed()->deccc(count, count_dec); // Pre-decrement 'count' | |
1219 | |
1220 const Register left_shift = G1; // left shift bit counter | |
1221 const Register right_shift = G5; // right shift bit counter | |
1222 | |
1223 __ sll(G1, LogBitsPerByte, left_shift); | |
1224 __ mov(64, right_shift); | |
1225 __ sub(right_shift, left_shift, right_shift); | |
1226 | |
1227 // | |
1228 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
1229 // to form 2 aligned 8-bytes chunks to store. | |
1230 // | |
1231 __ andn(end_from, 7, end_from); // Align address | |
1232 __ ldx(end_from, 0, O3); | |
1365 | 1233 __ align(OptoLoopAlignment); |
0 | 1234 __ BIND(L_loop); |
1235 __ ldx(end_from, -8, O4); | |
1236 __ deccc(count, count_dec); // Can we do next iteration after this one? | |
1237 __ ldx(end_from, -16, G4); | |
1238 __ dec(end_to, 16); | |
1239 __ dec(end_from, 16); | |
1240 __ srlx(O3, right_shift, O3); | |
1241 __ sllx(O4, left_shift, G3); | |
1242 __ bset(G3, O3); | |
1243 __ stx(O3, end_to, 8); | |
1244 __ srlx(O4, right_shift, O4); | |
1245 __ sllx(G4, left_shift, G3); | |
1246 __ bset(G3, O4); | |
1247 __ stx(O4, end_to, 0); | |
1248 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
1249 __ delayed()->mov(G4, O3); | |
1250 | |
1251 __ inccc(count, count_dec>>1 ); // + 8 bytes | |
1252 __ brx(Assembler::negative, true, Assembler::pn, L_copy_last_bytes); | |
1253 __ delayed()->inc(count, count_dec>>1); // restore 'count' | |
1254 | |
1255 // copy 8 bytes, part of them already loaded in O3 | |
1256 __ ldx(end_from, -8, O4); | |
1257 __ dec(end_to, 8); | |
1258 __ dec(end_from, 8); | |
1259 __ srlx(O3, right_shift, O3); | |
1260 __ sllx(O4, left_shift, G3); | |
1261 __ bset(O3, G3); | |
1262 __ stx(G3, end_to, 0); | |
1263 | |
1264 __ BIND(L_copy_last_bytes); | |
1265 __ srl(left_shift, LogBitsPerByte, left_shift); // misaligned bytes | |
1266 __ br(Assembler::always, false, Assembler::pt, L_copy_bytes); | |
1267 __ delayed()->add(end_from, left_shift, end_from); // restore address | |
1268 } | |
1269 | |
1270 // | |
1271 // Generate stub for disjoint byte copy. If "aligned" is true, the | |
1272 // "from" and "to" addresses are assumed to be heapword aligned. | |
1273 // | |
1274 // Arguments for generated stub: | |
1275 // from: O0 | |
1276 // to: O1 | |
1277 // count: O2 treated as signed | |
1278 // | |
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1279 address generate_disjoint_byte_copy(bool aligned, address *entry, const char *name) { |
0 | 1280 __ align(CodeEntryAlignment); |
1281 StubCodeMark mark(this, "StubRoutines", name); | |
1282 address start = __ pc(); | |
1283 | |
1284 Label L_skip_alignment, L_align; | |
1285 Label L_copy_byte, L_copy_byte_loop, L_exit; | |
1286 | |
1287 const Register from = O0; // source array address | |
1288 const Register to = O1; // destination array address | |
1289 const Register count = O2; // elements count | |
1290 const Register offset = O5; // offset from start of arrays | |
1291 // O3, O4, G3, G4 are used as temp registers | |
1292 | |
1293 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1294 | |
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1295 if (entry != NULL) { |
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1296 *entry = __ pc(); |
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1297 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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1298 BLOCK_COMMENT("Entry:"); |
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1299 } |
0 | 1300 |
1301 // for short arrays, just do single element copy | |
1302 __ cmp(count, 23); // 16 + 7 | |
1303 __ brx(Assembler::less, false, Assembler::pn, L_copy_byte); | |
1304 __ delayed()->mov(G0, offset); | |
1305 | |
1306 if (aligned) { | |
1307 // 'aligned' == true when it is known statically during compilation | |
1308 // of this arraycopy call site that both 'from' and 'to' addresses | |
1309 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
1310 // | |
1311 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
1312 // and 8 bytes - in 64-bits VM. So we do it only for 32-bits VM | |
1313 // | |
1314 #ifndef _LP64 | |
1315 // copy a 4-bytes word if necessary to align 'to' to 8 bytes | |
1316 __ andcc(to, 7, G0); | |
1317 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment); | |
1318 __ delayed()->ld(from, 0, O3); | |
1319 __ inc(from, 4); | |
1320 __ inc(to, 4); | |
1321 __ dec(count, 4); | |
1322 __ st(O3, to, -4); | |
1323 __ BIND(L_skip_alignment); | |
1324 #endif | |
1325 } else { | |
1326 // copy bytes to align 'to' on 8 byte boundary | |
1327 __ andcc(to, 7, G1); // misaligned bytes | |
1328 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1329 __ delayed()->neg(G1); | |
1330 __ inc(G1, 8); // bytes need to copy to next 8-bytes alignment | |
1331 __ sub(count, G1, count); | |
1332 __ BIND(L_align); | |
1333 __ ldub(from, 0, O3); | |
1334 __ deccc(G1); | |
1335 __ inc(from); | |
1336 __ stb(O3, to, 0); | |
1337 __ br(Assembler::notZero, false, Assembler::pt, L_align); | |
1338 __ delayed()->inc(to); | |
1339 __ BIND(L_skip_alignment); | |
1340 } | |
1341 #ifdef _LP64 | |
1342 if (!aligned) | |
1343 #endif | |
1344 { | |
1345 // Copy with shift 16 bytes per iteration if arrays do not have | |
1346 // the same alignment mod 8, otherwise fall through to the next | |
1347 // code for aligned copy. | |
1348 // The compare above (count >= 23) guarantes 'count' >= 16 bytes. | |
1349 // Also jump over aligned copy after the copy with shift completed. | |
1350 | |
1351 copy_16_bytes_forward_with_shift(from, to, count, 16, L_copy_byte); | |
1352 } | |
1353 | |
1354 // Both array are 8 bytes aligned, copy 16 bytes at a time | |
1355 __ and3(count, 7, G4); // Save count | |
1356 __ srl(count, 3, count); | |
1357 generate_disjoint_long_copy_core(aligned); | |
1358 __ mov(G4, count); // Restore count | |
1359 | |
1360 // copy tailing bytes | |
1361 __ BIND(L_copy_byte); | |
3839 | 1362 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
1365 | 1363 __ align(OptoLoopAlignment); |
0 | 1364 __ BIND(L_copy_byte_loop); |
1365 __ ldub(from, offset, O3); | |
1366 __ deccc(count); | |
1367 __ stb(O3, to, offset); | |
1368 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_byte_loop); | |
1369 __ delayed()->inc(offset); | |
1370 | |
1371 __ BIND(L_exit); | |
1372 // O3, O4 are used as temp registers | |
1373 inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr, O3, O4); | |
1374 __ retl(); | |
1375 __ delayed()->mov(G0, O0); // return 0 | |
1376 return start; | |
1377 } | |
1378 | |
1379 // | |
1380 // Generate stub for conjoint byte copy. If "aligned" is true, the | |
1381 // "from" and "to" addresses are assumed to be heapword aligned. | |
1382 // | |
1383 // Arguments for generated stub: | |
1384 // from: O0 | |
1385 // to: O1 | |
1386 // count: O2 treated as signed | |
1387 // | |
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1388 address generate_conjoint_byte_copy(bool aligned, address nooverlap_target, |
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1389 address *entry, const char *name) { |
0 | 1390 // Do reverse copy. |
1391 | |
1392 __ align(CodeEntryAlignment); | |
1393 StubCodeMark mark(this, "StubRoutines", name); | |
1394 address start = __ pc(); | |
1395 | |
1396 Label L_skip_alignment, L_align, L_aligned_copy; | |
1397 Label L_copy_byte, L_copy_byte_loop, L_exit; | |
1398 | |
1399 const Register from = O0; // source array address | |
1400 const Register to = O1; // destination array address | |
1401 const Register count = O2; // elements count | |
1402 const Register end_from = from; // source array end address | |
1403 const Register end_to = to; // destination array end address | |
1404 | |
1405 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1406 | |
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1407 if (entry != NULL) { |
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1408 *entry = __ pc(); |
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1409 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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1410 BLOCK_COMMENT("Entry:"); |
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1411 } |
0 | 1412 |
1413 array_overlap_test(nooverlap_target, 0); | |
1414 | |
1415 __ add(to, count, end_to); // offset after last copied element | |
1416 | |
1417 // for short arrays, just do single element copy | |
1418 __ cmp(count, 23); // 16 + 7 | |
1419 __ brx(Assembler::less, false, Assembler::pn, L_copy_byte); | |
1420 __ delayed()->add(from, count, end_from); | |
1421 | |
1422 { | |
1423 // Align end of arrays since they could be not aligned even | |
1424 // when arrays itself are aligned. | |
1425 | |
1426 // copy bytes to align 'end_to' on 8 byte boundary | |
1427 __ andcc(end_to, 7, G1); // misaligned bytes | |
1428 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1429 __ delayed()->nop(); | |
1430 __ sub(count, G1, count); | |
1431 __ BIND(L_align); | |
1432 __ dec(end_from); | |
1433 __ dec(end_to); | |
1434 __ ldub(end_from, 0, O3); | |
1435 __ deccc(G1); | |
1436 __ brx(Assembler::notZero, false, Assembler::pt, L_align); | |
1437 __ delayed()->stb(O3, end_to, 0); | |
1438 __ BIND(L_skip_alignment); | |
1439 } | |
1440 #ifdef _LP64 | |
1441 if (aligned) { | |
1442 // Both arrays are aligned to 8-bytes in 64-bits VM. | |
1443 // The 'count' is decremented in copy_16_bytes_backward_with_shift() | |
1444 // in unaligned case. | |
1445 __ dec(count, 16); | |
1446 } else | |
1447 #endif | |
1448 { | |
1449 // Copy with shift 16 bytes per iteration if arrays do not have | |
1450 // the same alignment mod 8, otherwise jump to the next | |
1451 // code for aligned copy (and substracting 16 from 'count' before jump). | |
1452 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
1453 // Also jump over aligned copy after the copy with shift completed. | |
1454 | |
1455 copy_16_bytes_backward_with_shift(end_from, end_to, count, 16, | |
1456 L_aligned_copy, L_copy_byte); | |
1457 } | |
1458 // copy 4 elements (16 bytes) at a time | |
1365 | 1459 __ align(OptoLoopAlignment); |
0 | 1460 __ BIND(L_aligned_copy); |
1461 __ dec(end_from, 16); | |
1462 __ ldx(end_from, 8, O3); | |
1463 __ ldx(end_from, 0, O4); | |
1464 __ dec(end_to, 16); | |
1465 __ deccc(count, 16); | |
1466 __ stx(O3, end_to, 8); | |
1467 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
1468 __ delayed()->stx(O4, end_to, 0); | |
1469 __ inc(count, 16); | |
1470 | |
1471 // copy 1 element (2 bytes) at a time | |
1472 __ BIND(L_copy_byte); | |
3839 | 1473 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
1365 | 1474 __ align(OptoLoopAlignment); |
0 | 1475 __ BIND(L_copy_byte_loop); |
1476 __ dec(end_from); | |
1477 __ dec(end_to); | |
1478 __ ldub(end_from, 0, O4); | |
1479 __ deccc(count); | |
1480 __ brx(Assembler::greater, false, Assembler::pt, L_copy_byte_loop); | |
1481 __ delayed()->stb(O4, end_to, 0); | |
1482 | |
1483 __ BIND(L_exit); | |
1484 // O3, O4 are used as temp registers | |
1485 inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr, O3, O4); | |
1486 __ retl(); | |
1487 __ delayed()->mov(G0, O0); // return 0 | |
1488 return start; | |
1489 } | |
1490 | |
1491 // | |
1492 // Generate stub for disjoint short copy. If "aligned" is true, the | |
1493 // "from" and "to" addresses are assumed to be heapword aligned. | |
1494 // | |
1495 // Arguments for generated stub: | |
1496 // from: O0 | |
1497 // to: O1 | |
1498 // count: O2 treated as signed | |
1499 // | |
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1500 address generate_disjoint_short_copy(bool aligned, address *entry, const char * name) { |
0 | 1501 __ align(CodeEntryAlignment); |
1502 StubCodeMark mark(this, "StubRoutines", name); | |
1503 address start = __ pc(); | |
1504 | |
1505 Label L_skip_alignment, L_skip_alignment2; | |
1506 Label L_copy_2_bytes, L_copy_2_bytes_loop, L_exit; | |
1507 | |
1508 const Register from = O0; // source array address | |
1509 const Register to = O1; // destination array address | |
1510 const Register count = O2; // elements count | |
1511 const Register offset = O5; // offset from start of arrays | |
1512 // O3, O4, G3, G4 are used as temp registers | |
1513 | |
1514 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1515 | |
2313
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1516 if (entry != NULL) { |
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1517 *entry = __ pc(); |
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1518 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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1519 BLOCK_COMMENT("Entry:"); |
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1520 } |
0 | 1521 |
1522 // for short arrays, just do single element copy | |
1523 __ cmp(count, 11); // 8 + 3 (22 bytes) | |
1524 __ brx(Assembler::less, false, Assembler::pn, L_copy_2_bytes); | |
1525 __ delayed()->mov(G0, offset); | |
1526 | |
1527 if (aligned) { | |
1528 // 'aligned' == true when it is known statically during compilation | |
1529 // of this arraycopy call site that both 'from' and 'to' addresses | |
1530 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
1531 // | |
1532 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
1533 // and 8 bytes - in 64-bits VM. | |
1534 // | |
1535 #ifndef _LP64 | |
1536 // copy a 2-elements word if necessary to align 'to' to 8 bytes | |
1537 __ andcc(to, 7, G0); | |
1538 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1539 __ delayed()->ld(from, 0, O3); | |
1540 __ inc(from, 4); | |
1541 __ inc(to, 4); | |
1542 __ dec(count, 2); | |
1543 __ st(O3, to, -4); | |
1544 __ BIND(L_skip_alignment); | |
1545 #endif | |
1546 } else { | |
1547 // copy 1 element if necessary to align 'to' on an 4 bytes | |
1548 __ andcc(to, 3, G0); | |
1549 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1550 __ delayed()->lduh(from, 0, O3); | |
1551 __ inc(from, 2); | |
1552 __ inc(to, 2); | |
1553 __ dec(count); | |
1554 __ sth(O3, to, -2); | |
1555 __ BIND(L_skip_alignment); | |
1556 | |
1557 // copy 2 elements to align 'to' on an 8 byte boundary | |
1558 __ andcc(to, 7, G0); | |
1559 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment2); | |
1560 __ delayed()->lduh(from, 0, O3); | |
1561 __ dec(count, 2); | |
1562 __ lduh(from, 2, O4); | |
1563 __ inc(from, 4); | |
1564 __ inc(to, 4); | |
1565 __ sth(O3, to, -4); | |
1566 __ sth(O4, to, -2); | |
1567 __ BIND(L_skip_alignment2); | |
1568 } | |
1569 #ifdef _LP64 | |
1570 if (!aligned) | |
1571 #endif | |
1572 { | |
1573 // Copy with shift 16 bytes per iteration if arrays do not have | |
1574 // the same alignment mod 8, otherwise fall through to the next | |
1575 // code for aligned copy. | |
1576 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
1577 // Also jump over aligned copy after the copy with shift completed. | |
1578 | |
1579 copy_16_bytes_forward_with_shift(from, to, count, 8, L_copy_2_bytes); | |
1580 } | |
1581 | |
1582 // Both array are 8 bytes aligned, copy 16 bytes at a time | |
1583 __ and3(count, 3, G4); // Save | |
1584 __ srl(count, 2, count); | |
1585 generate_disjoint_long_copy_core(aligned); | |
1586 __ mov(G4, count); // restore | |
1587 | |
1588 // copy 1 element at a time | |
1589 __ BIND(L_copy_2_bytes); | |
3839 | 1590 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
1365 | 1591 __ align(OptoLoopAlignment); |
0 | 1592 __ BIND(L_copy_2_bytes_loop); |
1593 __ lduh(from, offset, O3); | |
1594 __ deccc(count); | |
1595 __ sth(O3, to, offset); | |
1596 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_2_bytes_loop); | |
1597 __ delayed()->inc(offset, 2); | |
1598 | |
1599 __ BIND(L_exit); | |
1600 // O3, O4 are used as temp registers | |
1601 inc_counter_np(SharedRuntime::_jshort_array_copy_ctr, O3, O4); | |
1602 __ retl(); | |
1603 __ delayed()->mov(G0, O0); // return 0 | |
1604 return start; | |
1605 } | |
1606 | |
1607 // | |
1763 | 1608 // Generate stub for disjoint short fill. If "aligned" is true, the |
1609 // "to" address is assumed to be heapword aligned. | |
1610 // | |
1611 // Arguments for generated stub: | |
1612 // to: O0 | |
1613 // value: O1 | |
1614 // count: O2 treated as signed | |
1615 // | |
1616 address generate_fill(BasicType t, bool aligned, const char* name) { | |
1617 __ align(CodeEntryAlignment); | |
1618 StubCodeMark mark(this, "StubRoutines", name); | |
1619 address start = __ pc(); | |
1620 | |
1621 const Register to = O0; // source array address | |
1622 const Register value = O1; // fill value | |
1623 const Register count = O2; // elements count | |
1624 // O3 is used as a temp register | |
1625 | |
1626 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1627 | |
1628 Label L_exit, L_skip_align1, L_skip_align2, L_fill_byte; | |
1794 | 1629 Label L_fill_2_bytes, L_fill_elements, L_fill_32_bytes; |
1763 | 1630 |
1631 int shift = -1; | |
1632 switch (t) { | |
1633 case T_BYTE: | |
1634 shift = 2; | |
1635 break; | |
1636 case T_SHORT: | |
1637 shift = 1; | |
1638 break; | |
1639 case T_INT: | |
1640 shift = 0; | |
1641 break; | |
1642 default: ShouldNotReachHere(); | |
1643 } | |
1644 | |
1645 BLOCK_COMMENT("Entry:"); | |
1646 | |
1647 if (t == T_BYTE) { | |
1648 // Zero extend value | |
1649 __ and3(value, 0xff, value); | |
1650 __ sllx(value, 8, O3); | |
1651 __ or3(value, O3, value); | |
1652 } | |
1653 if (t == T_SHORT) { | |
1654 // Zero extend value | |
1794 | 1655 __ sllx(value, 48, value); |
1656 __ srlx(value, 48, value); | |
1763 | 1657 } |
1658 if (t == T_BYTE || t == T_SHORT) { | |
1659 __ sllx(value, 16, O3); | |
1660 __ or3(value, O3, value); | |
1661 } | |
1662 | |
1663 __ cmp(count, 2<<shift); // Short arrays (< 8 bytes) fill by element | |
1794 | 1664 __ brx(Assembler::lessUnsigned, false, Assembler::pn, L_fill_elements); // use unsigned cmp |
1665 __ delayed()->andcc(count, 1, G0); | |
1763 | 1666 |
1667 if (!aligned && (t == T_BYTE || t == T_SHORT)) { | |
1668 // align source address at 4 bytes address boundary | |
1669 if (t == T_BYTE) { | |
1670 // One byte misalignment happens only for byte arrays | |
1671 __ andcc(to, 1, G0); | |
1672 __ br(Assembler::zero, false, Assembler::pt, L_skip_align1); | |
1673 __ delayed()->nop(); | |
1674 __ stb(value, to, 0); | |
1675 __ inc(to, 1); | |
1676 __ dec(count, 1); | |
1677 __ BIND(L_skip_align1); | |
1678 } | |
1679 // Two bytes misalignment happens only for byte and short (char) arrays | |
1680 __ andcc(to, 2, G0); | |
1681 __ br(Assembler::zero, false, Assembler::pt, L_skip_align2); | |
1682 __ delayed()->nop(); | |
1683 __ sth(value, to, 0); | |
1684 __ inc(to, 2); | |
1685 __ dec(count, 1 << (shift - 1)); | |
1686 __ BIND(L_skip_align2); | |
1687 } | |
1688 #ifdef _LP64 | |
1689 if (!aligned) { | |
1690 #endif | |
1691 // align to 8 bytes, we know we are 4 byte aligned to start | |
1692 __ andcc(to, 7, G0); | |
1693 __ br(Assembler::zero, false, Assembler::pt, L_fill_32_bytes); | |
1694 __ delayed()->nop(); | |
1695 __ stw(value, to, 0); | |
1696 __ inc(to, 4); | |
1697 __ dec(count, 1 << shift); | |
1698 __ BIND(L_fill_32_bytes); | |
1699 #ifdef _LP64 | |
1700 } | |
1701 #endif | |
1702 | |
1703 if (t == T_INT) { | |
1704 // Zero extend value | |
1705 __ srl(value, 0, value); | |
1706 } | |
1707 if (t == T_BYTE || t == T_SHORT || t == T_INT) { | |
1708 __ sllx(value, 32, O3); | |
1709 __ or3(value, O3, value); | |
1710 } | |
1711 | |
1782 | 1712 Label L_check_fill_8_bytes; |
1713 // Fill 32-byte chunks | |
1714 __ subcc(count, 8 << shift, count); | |
1715 __ brx(Assembler::less, false, Assembler::pt, L_check_fill_8_bytes); | |
1716 __ delayed()->nop(); | |
1717 | |
1794 | 1718 Label L_fill_32_bytes_loop, L_fill_4_bytes; |
1763 | 1719 __ align(16); |
1720 __ BIND(L_fill_32_bytes_loop); | |
1721 | |
1722 __ stx(value, to, 0); | |
1723 __ stx(value, to, 8); | |
1724 __ stx(value, to, 16); | |
1725 __ stx(value, to, 24); | |
1726 | |
1727 __ subcc(count, 8 << shift, count); | |
1728 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_fill_32_bytes_loop); | |
1729 __ delayed()->add(to, 32, to); | |
1730 | |
1731 __ BIND(L_check_fill_8_bytes); | |
1732 __ addcc(count, 8 << shift, count); | |
1733 __ brx(Assembler::zero, false, Assembler::pn, L_exit); | |
1734 __ delayed()->subcc(count, 1 << (shift + 1), count); | |
1735 __ brx(Assembler::less, false, Assembler::pn, L_fill_4_bytes); | |
1736 __ delayed()->andcc(count, 1<<shift, G0); | |
1737 | |
1738 // | |
1739 // length is too short, just fill 8 bytes at a time | |
1740 // | |
1741 Label L_fill_8_bytes_loop; | |
1742 __ BIND(L_fill_8_bytes_loop); | |
1743 __ stx(value, to, 0); | |
1744 __ subcc(count, 1 << (shift + 1), count); | |
1745 __ brx(Assembler::greaterEqual, false, Assembler::pn, L_fill_8_bytes_loop); | |
1746 __ delayed()->add(to, 8, to); | |
1747 | |
1748 // fill trailing 4 bytes | |
1749 __ andcc(count, 1<<shift, G0); // in delay slot of branches | |
1794 | 1750 if (t == T_INT) { |
1751 __ BIND(L_fill_elements); | |
1752 } | |
1763 | 1753 __ BIND(L_fill_4_bytes); |
1754 __ brx(Assembler::zero, false, Assembler::pt, L_fill_2_bytes); | |
1755 if (t == T_BYTE || t == T_SHORT) { | |
1756 __ delayed()->andcc(count, 1<<(shift-1), G0); | |
1757 } else { | |
1758 __ delayed()->nop(); | |
1759 } | |
1760 __ stw(value, to, 0); | |
1761 if (t == T_BYTE || t == T_SHORT) { | |
1762 __ inc(to, 4); | |
1763 // fill trailing 2 bytes | |
1764 __ andcc(count, 1<<(shift-1), G0); // in delay slot of branches | |
1765 __ BIND(L_fill_2_bytes); | |
1766 __ brx(Assembler::zero, false, Assembler::pt, L_fill_byte); | |
1767 __ delayed()->andcc(count, 1, count); | |
1768 __ sth(value, to, 0); | |
1769 if (t == T_BYTE) { | |
1770 __ inc(to, 2); | |
1771 // fill trailing byte | |
1772 __ andcc(count, 1, count); // in delay slot of branches | |
1773 __ BIND(L_fill_byte); | |
1774 __ brx(Assembler::zero, false, Assembler::pt, L_exit); | |
1775 __ delayed()->nop(); | |
1776 __ stb(value, to, 0); | |
1777 } else { | |
1778 __ BIND(L_fill_byte); | |
1779 } | |
1780 } else { | |
1781 __ BIND(L_fill_2_bytes); | |
1782 } | |
1783 __ BIND(L_exit); | |
1784 __ retl(); | |
1794 | 1785 __ delayed()->nop(); |
1786 | |
1787 // Handle copies less than 8 bytes. Int is handled elsewhere. | |
1788 if (t == T_BYTE) { | |
1789 __ BIND(L_fill_elements); | |
1790 Label L_fill_2, L_fill_4; | |
1791 // in delay slot __ andcc(count, 1, G0); | |
1792 __ brx(Assembler::zero, false, Assembler::pt, L_fill_2); | |
1793 __ delayed()->andcc(count, 2, G0); | |
1794 __ stb(value, to, 0); | |
1795 __ inc(to, 1); | |
1796 __ BIND(L_fill_2); | |
1797 __ brx(Assembler::zero, false, Assembler::pt, L_fill_4); | |
1798 __ delayed()->andcc(count, 4, G0); | |
1799 __ stb(value, to, 0); | |
1800 __ stb(value, to, 1); | |
1801 __ inc(to, 2); | |
1802 __ BIND(L_fill_4); | |
1803 __ brx(Assembler::zero, false, Assembler::pt, L_exit); | |
1804 __ delayed()->nop(); | |
1805 __ stb(value, to, 0); | |
1806 __ stb(value, to, 1); | |
1807 __ stb(value, to, 2); | |
1808 __ retl(); | |
1809 __ delayed()->stb(value, to, 3); | |
1810 } | |
1811 | |
1812 if (t == T_SHORT) { | |
1813 Label L_fill_2; | |
1814 __ BIND(L_fill_elements); | |
1815 // in delay slot __ andcc(count, 1, G0); | |
1816 __ brx(Assembler::zero, false, Assembler::pt, L_fill_2); | |
1817 __ delayed()->andcc(count, 2, G0); | |
1818 __ sth(value, to, 0); | |
1819 __ inc(to, 2); | |
1820 __ BIND(L_fill_2); | |
1821 __ brx(Assembler::zero, false, Assembler::pt, L_exit); | |
1822 __ delayed()->nop(); | |
1823 __ sth(value, to, 0); | |
1824 __ retl(); | |
1825 __ delayed()->sth(value, to, 2); | |
1826 } | |
1763 | 1827 return start; |
1828 } | |
1829 | |
1830 // | |
0 | 1831 // Generate stub for conjoint short copy. If "aligned" is true, the |
1832 // "from" and "to" addresses are assumed to be heapword aligned. | |
1833 // | |
1834 // Arguments for generated stub: | |
1835 // from: O0 | |
1836 // to: O1 | |
1837 // count: O2 treated as signed | |
1838 // | |
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1839 address generate_conjoint_short_copy(bool aligned, address nooverlap_target, |
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1840 address *entry, const char *name) { |
0 | 1841 // Do reverse copy. |
1842 | |
1843 __ align(CodeEntryAlignment); | |
1844 StubCodeMark mark(this, "StubRoutines", name); | |
1845 address start = __ pc(); | |
1846 | |
1847 Label L_skip_alignment, L_skip_alignment2, L_aligned_copy; | |
1848 Label L_copy_2_bytes, L_copy_2_bytes_loop, L_exit; | |
1849 | |
1850 const Register from = O0; // source array address | |
1851 const Register to = O1; // destination array address | |
1852 const Register count = O2; // elements count | |
1853 const Register end_from = from; // source array end address | |
1854 const Register end_to = to; // destination array end address | |
1855 | |
1856 const Register byte_count = O3; // bytes count to copy | |
1857 | |
1858 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
1859 | |
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1860 if (entry != NULL) { |
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1861 *entry = __ pc(); |
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1862 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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1863 BLOCK_COMMENT("Entry:"); |
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1864 } |
0 | 1865 |
1866 array_overlap_test(nooverlap_target, 1); | |
1867 | |
1868 __ sllx(count, LogBytesPerShort, byte_count); | |
1869 __ add(to, byte_count, end_to); // offset after last copied element | |
1870 | |
1871 // for short arrays, just do single element copy | |
1872 __ cmp(count, 11); // 8 + 3 (22 bytes) | |
1873 __ brx(Assembler::less, false, Assembler::pn, L_copy_2_bytes); | |
1874 __ delayed()->add(from, byte_count, end_from); | |
1875 | |
1876 { | |
1877 // Align end of arrays since they could be not aligned even | |
1878 // when arrays itself are aligned. | |
1879 | |
1880 // copy 1 element if necessary to align 'end_to' on an 4 bytes | |
1881 __ andcc(end_to, 3, G0); | |
1882 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1883 __ delayed()->lduh(end_from, -2, O3); | |
1884 __ dec(end_from, 2); | |
1885 __ dec(end_to, 2); | |
1886 __ dec(count); | |
1887 __ sth(O3, end_to, 0); | |
1888 __ BIND(L_skip_alignment); | |
1889 | |
1890 // copy 2 elements to align 'end_to' on an 8 byte boundary | |
1891 __ andcc(end_to, 7, G0); | |
1892 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment2); | |
1893 __ delayed()->lduh(end_from, -2, O3); | |
1894 __ dec(count, 2); | |
1895 __ lduh(end_from, -4, O4); | |
1896 __ dec(end_from, 4); | |
1897 __ dec(end_to, 4); | |
1898 __ sth(O3, end_to, 2); | |
1899 __ sth(O4, end_to, 0); | |
1900 __ BIND(L_skip_alignment2); | |
1901 } | |
1902 #ifdef _LP64 | |
1903 if (aligned) { | |
1904 // Both arrays are aligned to 8-bytes in 64-bits VM. | |
1905 // The 'count' is decremented in copy_16_bytes_backward_with_shift() | |
1906 // in unaligned case. | |
1907 __ dec(count, 8); | |
1908 } else | |
1909 #endif | |
1910 { | |
1911 // Copy with shift 16 bytes per iteration if arrays do not have | |
1912 // the same alignment mod 8, otherwise jump to the next | |
1913 // code for aligned copy (and substracting 8 from 'count' before jump). | |
1914 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
1915 // Also jump over aligned copy after the copy with shift completed. | |
1916 | |
1917 copy_16_bytes_backward_with_shift(end_from, end_to, count, 8, | |
1918 L_aligned_copy, L_copy_2_bytes); | |
1919 } | |
1920 // copy 4 elements (16 bytes) at a time | |
1365 | 1921 __ align(OptoLoopAlignment); |
0 | 1922 __ BIND(L_aligned_copy); |
1923 __ dec(end_from, 16); | |
1924 __ ldx(end_from, 8, O3); | |
1925 __ ldx(end_from, 0, O4); | |
1926 __ dec(end_to, 16); | |
1927 __ deccc(count, 8); | |
1928 __ stx(O3, end_to, 8); | |
1929 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
1930 __ delayed()->stx(O4, end_to, 0); | |
1931 __ inc(count, 8); | |
1932 | |
1933 // copy 1 element (2 bytes) at a time | |
1934 __ BIND(L_copy_2_bytes); | |
3839 | 1935 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
0 | 1936 __ BIND(L_copy_2_bytes_loop); |
1937 __ dec(end_from, 2); | |
1938 __ dec(end_to, 2); | |
1939 __ lduh(end_from, 0, O4); | |
1940 __ deccc(count); | |
1941 __ brx(Assembler::greater, false, Assembler::pt, L_copy_2_bytes_loop); | |
1942 __ delayed()->sth(O4, end_to, 0); | |
1943 | |
1944 __ BIND(L_exit); | |
1945 // O3, O4 are used as temp registers | |
1946 inc_counter_np(SharedRuntime::_jshort_array_copy_ctr, O3, O4); | |
1947 __ retl(); | |
1948 __ delayed()->mov(G0, O0); // return 0 | |
1949 return start; | |
1950 } | |
1951 | |
1952 // | |
1953 // Generate core code for disjoint int copy (and oop copy on 32-bit). | |
1954 // If "aligned" is true, the "from" and "to" addresses are assumed | |
1955 // to be heapword aligned. | |
1956 // | |
1957 // Arguments: | |
1958 // from: O0 | |
1959 // to: O1 | |
1960 // count: O2 treated as signed | |
1961 // | |
1962 void generate_disjoint_int_copy_core(bool aligned) { | |
1963 | |
1964 Label L_skip_alignment, L_aligned_copy; | |
1965 Label L_copy_16_bytes, L_copy_4_bytes, L_copy_4_bytes_loop, L_exit; | |
1966 | |
1967 const Register from = O0; // source array address | |
1968 const Register to = O1; // destination array address | |
1969 const Register count = O2; // elements count | |
1970 const Register offset = O5; // offset from start of arrays | |
1971 // O3, O4, G3, G4 are used as temp registers | |
1972 | |
1973 // 'aligned' == true when it is known statically during compilation | |
1974 // of this arraycopy call site that both 'from' and 'to' addresses | |
1975 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
1976 // | |
1977 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
1978 // and 8 bytes - in 64-bits VM. | |
1979 // | |
1980 #ifdef _LP64 | |
1981 if (!aligned) | |
1982 #endif | |
1983 { | |
1984 // The next check could be put under 'ifndef' since the code in | |
1985 // generate_disjoint_long_copy_core() has own checks and set 'offset'. | |
1986 | |
1987 // for short arrays, just do single element copy | |
1988 __ cmp(count, 5); // 4 + 1 (20 bytes) | |
1989 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_4_bytes); | |
1990 __ delayed()->mov(G0, offset); | |
1991 | |
1992 // copy 1 element to align 'to' on an 8 byte boundary | |
1993 __ andcc(to, 7, G0); | |
1994 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
1995 __ delayed()->ld(from, 0, O3); | |
1996 __ inc(from, 4); | |
1997 __ inc(to, 4); | |
1998 __ dec(count); | |
1999 __ st(O3, to, -4); | |
2000 __ BIND(L_skip_alignment); | |
2001 | |
2002 // if arrays have same alignment mod 8, do 4 elements copy | |
2003 __ andcc(from, 7, G0); | |
2004 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
2005 __ delayed()->ld(from, 0, O3); | |
2006 | |
2007 // | |
2008 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
2009 // to form 2 aligned 8-bytes chunks to store. | |
2010 // | |
2011 // copy_16_bytes_forward_with_shift() is not used here since this | |
2012 // code is more optimal. | |
2013 | |
2014 // copy with shift 4 elements (16 bytes) at a time | |
2015 __ dec(count, 4); // The cmp at the beginning guaranty count >= 4 | |
2016 | |
1365 | 2017 __ align(OptoLoopAlignment); |
0 | 2018 __ BIND(L_copy_16_bytes); |
2019 __ ldx(from, 4, O4); | |
2020 __ deccc(count, 4); // Can we do next iteration after this one? | |
2021 __ ldx(from, 12, G4); | |
2022 __ inc(to, 16); | |
2023 __ inc(from, 16); | |
2024 __ sllx(O3, 32, O3); | |
2025 __ srlx(O4, 32, G3); | |
2026 __ bset(G3, O3); | |
2027 __ stx(O3, to, -16); | |
2028 __ sllx(O4, 32, O4); | |
2029 __ srlx(G4, 32, G3); | |
2030 __ bset(G3, O4); | |
2031 __ stx(O4, to, -8); | |
2032 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes); | |
2033 __ delayed()->mov(G4, O3); | |
2034 | |
2035 __ br(Assembler::always, false, Assembler::pt, L_copy_4_bytes); | |
2036 __ delayed()->inc(count, 4); // restore 'count' | |
2037 | |
2038 __ BIND(L_aligned_copy); | |
2039 } | |
2040 // copy 4 elements (16 bytes) at a time | |
2041 __ and3(count, 1, G4); // Save | |
2042 __ srl(count, 1, count); | |
2043 generate_disjoint_long_copy_core(aligned); | |
2044 __ mov(G4, count); // Restore | |
2045 | |
2046 // copy 1 element at a time | |
2047 __ BIND(L_copy_4_bytes); | |
3839 | 2048 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
0 | 2049 __ BIND(L_copy_4_bytes_loop); |
2050 __ ld(from, offset, O3); | |
2051 __ deccc(count); | |
2052 __ st(O3, to, offset); | |
2053 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_4_bytes_loop); | |
2054 __ delayed()->inc(offset, 4); | |
2055 __ BIND(L_exit); | |
2056 } | |
2057 | |
2058 // | |
2059 // Generate stub for disjoint int copy. If "aligned" is true, the | |
2060 // "from" and "to" addresses are assumed to be heapword aligned. | |
2061 // | |
2062 // Arguments for generated stub: | |
2063 // from: O0 | |
2064 // to: O1 | |
2065 // count: O2 treated as signed | |
2066 // | |
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2067 address generate_disjoint_int_copy(bool aligned, address *entry, const char *name) { |
0 | 2068 __ align(CodeEntryAlignment); |
2069 StubCodeMark mark(this, "StubRoutines", name); | |
2070 address start = __ pc(); | |
2071 | |
2072 const Register count = O2; | |
2073 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
2074 | |
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2075 if (entry != NULL) { |
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2076 *entry = __ pc(); |
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2077 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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2078 BLOCK_COMMENT("Entry:"); |
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2079 } |
0 | 2080 |
2081 generate_disjoint_int_copy_core(aligned); | |
2082 | |
2083 // O3, O4 are used as temp registers | |
2084 inc_counter_np(SharedRuntime::_jint_array_copy_ctr, O3, O4); | |
2085 __ retl(); | |
2086 __ delayed()->mov(G0, O0); // return 0 | |
2087 return start; | |
2088 } | |
2089 | |
2090 // | |
2091 // Generate core code for conjoint int copy (and oop copy on 32-bit). | |
2092 // If "aligned" is true, the "from" and "to" addresses are assumed | |
2093 // to be heapword aligned. | |
2094 // | |
2095 // Arguments: | |
2096 // from: O0 | |
2097 // to: O1 | |
2098 // count: O2 treated as signed | |
2099 // | |
2100 void generate_conjoint_int_copy_core(bool aligned) { | |
2101 // Do reverse copy. | |
2102 | |
2103 Label L_skip_alignment, L_aligned_copy; | |
2104 Label L_copy_16_bytes, L_copy_4_bytes, L_copy_4_bytes_loop, L_exit; | |
2105 | |
2106 const Register from = O0; // source array address | |
2107 const Register to = O1; // destination array address | |
2108 const Register count = O2; // elements count | |
2109 const Register end_from = from; // source array end address | |
2110 const Register end_to = to; // destination array end address | |
2111 // O3, O4, O5, G3 are used as temp registers | |
2112 | |
2113 const Register byte_count = O3; // bytes count to copy | |
2114 | |
2115 __ sllx(count, LogBytesPerInt, byte_count); | |
2116 __ add(to, byte_count, end_to); // offset after last copied element | |
2117 | |
2118 __ cmp(count, 5); // for short arrays, just do single element copy | |
2119 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_4_bytes); | |
2120 __ delayed()->add(from, byte_count, end_from); | |
2121 | |
2122 // copy 1 element to align 'to' on an 8 byte boundary | |
2123 __ andcc(end_to, 7, G0); | |
2124 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
2125 __ delayed()->nop(); | |
2126 __ dec(count); | |
2127 __ dec(end_from, 4); | |
2128 __ dec(end_to, 4); | |
2129 __ ld(end_from, 0, O4); | |
2130 __ st(O4, end_to, 0); | |
2131 __ BIND(L_skip_alignment); | |
2132 | |
2133 // Check if 'end_from' and 'end_to' has the same alignment. | |
2134 __ andcc(end_from, 7, G0); | |
2135 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
2136 __ delayed()->dec(count, 4); // The cmp at the start guaranty cnt >= 4 | |
2137 | |
2138 // copy with shift 4 elements (16 bytes) at a time | |
2139 // | |
2140 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
2141 // to form 2 aligned 8-bytes chunks to store. | |
2142 // | |
2143 __ ldx(end_from, -4, O3); | |
1365 | 2144 __ align(OptoLoopAlignment); |
0 | 2145 __ BIND(L_copy_16_bytes); |
2146 __ ldx(end_from, -12, O4); | |
2147 __ deccc(count, 4); | |
2148 __ ldx(end_from, -20, O5); | |
2149 __ dec(end_to, 16); | |
2150 __ dec(end_from, 16); | |
2151 __ srlx(O3, 32, O3); | |
2152 __ sllx(O4, 32, G3); | |
2153 __ bset(G3, O3); | |
2154 __ stx(O3, end_to, 8); | |
2155 __ srlx(O4, 32, O4); | |
2156 __ sllx(O5, 32, G3); | |
2157 __ bset(O4, G3); | |
2158 __ stx(G3, end_to, 0); | |
2159 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes); | |
2160 __ delayed()->mov(O5, O3); | |
2161 | |
2162 __ br(Assembler::always, false, Assembler::pt, L_copy_4_bytes); | |
2163 __ delayed()->inc(count, 4); | |
2164 | |
2165 // copy 4 elements (16 bytes) at a time | |
1365 | 2166 __ align(OptoLoopAlignment); |
0 | 2167 __ BIND(L_aligned_copy); |
2168 __ dec(end_from, 16); | |
2169 __ ldx(end_from, 8, O3); | |
2170 __ ldx(end_from, 0, O4); | |
2171 __ dec(end_to, 16); | |
2172 __ deccc(count, 4); | |
2173 __ stx(O3, end_to, 8); | |
2174 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
2175 __ delayed()->stx(O4, end_to, 0); | |
2176 __ inc(count, 4); | |
2177 | |
2178 // copy 1 element (4 bytes) at a time | |
2179 __ BIND(L_copy_4_bytes); | |
3839 | 2180 __ cmp_and_br_short(count, 0, Assembler::equal, Assembler::pt, L_exit); |
0 | 2181 __ BIND(L_copy_4_bytes_loop); |
2182 __ dec(end_from, 4); | |
2183 __ dec(end_to, 4); | |
2184 __ ld(end_from, 0, O4); | |
2185 __ deccc(count); | |
2186 __ brx(Assembler::greater, false, Assembler::pt, L_copy_4_bytes_loop); | |
2187 __ delayed()->st(O4, end_to, 0); | |
2188 __ BIND(L_exit); | |
2189 } | |
2190 | |
2191 // | |
2192 // Generate stub for conjoint int copy. If "aligned" is true, the | |
2193 // "from" and "to" addresses are assumed to be heapword aligned. | |
2194 // | |
2195 // Arguments for generated stub: | |
2196 // from: O0 | |
2197 // to: O1 | |
2198 // count: O2 treated as signed | |
2199 // | |
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2200 address generate_conjoint_int_copy(bool aligned, address nooverlap_target, |
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2201 address *entry, const char *name) { |
0 | 2202 __ align(CodeEntryAlignment); |
2203 StubCodeMark mark(this, "StubRoutines", name); | |
2204 address start = __ pc(); | |
2205 | |
2206 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
2207 | |
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2208 if (entry != NULL) { |
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2209 *entry = __ pc(); |
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2210 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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2211 BLOCK_COMMENT("Entry:"); |
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2212 } |
0 | 2213 |
2214 array_overlap_test(nooverlap_target, 2); | |
2215 | |
2216 generate_conjoint_int_copy_core(aligned); | |
2217 | |
2218 // O3, O4 are used as temp registers | |
2219 inc_counter_np(SharedRuntime::_jint_array_copy_ctr, O3, O4); | |
2220 __ retl(); | |
2221 __ delayed()->mov(G0, O0); // return 0 | |
2222 return start; | |
2223 } | |
2224 | |
2225 // | |
2226 // Generate core code for disjoint long copy (and oop copy on 64-bit). | |
2227 // "aligned" is ignored, because we must make the stronger | |
2228 // assumption that both addresses are always 64-bit aligned. | |
2229 // | |
2230 // Arguments: | |
2231 // from: O0 | |
2232 // to: O1 | |
2233 // count: O2 treated as signed | |
2234 // | |
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2235 // count -= 2; |
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2236 // if ( count >= 0 ) { // >= 2 elements |
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2237 // if ( count > 6) { // >= 8 elements |
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2238 // count -= 6; // original count - 8 |
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2239 // do { |
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2240 // copy_8_elements; |
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2241 // count -= 8; |
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2242 // } while ( count >= 0 ); |
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2243 // count += 6; |
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2244 // } |
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2245 // if ( count >= 0 ) { // >= 2 elements |
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2246 // do { |
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2247 // copy_2_elements; |
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2248 // } while ( (count=count-2) >= 0 ); |
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2249 // } |
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2250 // } |
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2251 // count += 2; |
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2252 // if ( count != 0 ) { // 1 element left |
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2253 // copy_1_element; |
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2254 // } |
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2255 // |
0 | 2256 void generate_disjoint_long_copy_core(bool aligned) { |
2257 Label L_copy_8_bytes, L_copy_16_bytes, L_exit; | |
2258 const Register from = O0; // source array address | |
2259 const Register to = O1; // destination array address | |
2260 const Register count = O2; // elements count | |
2261 const Register offset0 = O4; // element offset | |
2262 const Register offset8 = O5; // next element offset | |
2263 | |
2264 __ deccc(count, 2); | |
2265 __ mov(G0, offset0); // offset from start of arrays (0) | |
2266 __ brx(Assembler::negative, false, Assembler::pn, L_copy_8_bytes ); | |
2267 __ delayed()->add(offset0, 8, offset8); | |
1364
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2268 |
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2269 // Copy by 64 bytes chunks |
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2270 Label L_copy_64_bytes; |
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2271 const Register from64 = O3; // source address |
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2272 const Register to64 = G3; // destination address |
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2273 __ subcc(count, 6, O3); |
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2274 __ brx(Assembler::negative, false, Assembler::pt, L_copy_16_bytes ); |
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2275 __ delayed()->mov(to, to64); |
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2276 // Now we can use O4(offset0), O5(offset8) as temps |
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2277 __ mov(O3, count); |
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2278 __ mov(from, from64); |
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2279 |
1365 | 2280 __ align(OptoLoopAlignment); |
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2281 __ BIND(L_copy_64_bytes); |
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2282 for( int off = 0; off < 64; off += 16 ) { |
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2283 __ ldx(from64, off+0, O4); |
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2284 __ ldx(from64, off+8, O5); |
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2285 __ stx(O4, to64, off+0); |
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2286 __ stx(O5, to64, off+8); |
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2287 } |
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2288 __ deccc(count, 8); |
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2289 __ inc(from64, 64); |
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2290 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_64_bytes); |
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2291 __ delayed()->inc(to64, 64); |
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2292 |
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2293 // Restore O4(offset0), O5(offset8) |
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2294 __ sub(from64, from, offset0); |
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2295 __ inccc(count, 6); |
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2296 __ brx(Assembler::negative, false, Assembler::pn, L_copy_8_bytes ); |
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2297 __ delayed()->add(offset0, 8, offset8); |
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2298 |
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2299 // Copy by 16 bytes chunks |
1365 | 2300 __ align(OptoLoopAlignment); |
0 | 2301 __ BIND(L_copy_16_bytes); |
2302 __ ldx(from, offset0, O3); | |
2303 __ ldx(from, offset8, G3); | |
2304 __ deccc(count, 2); | |
2305 __ stx(O3, to, offset0); | |
2306 __ inc(offset0, 16); | |
2307 __ stx(G3, to, offset8); | |
2308 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes); | |
2309 __ delayed()->inc(offset8, 16); | |
2310 | |
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2311 // Copy last 8 bytes |
0 | 2312 __ BIND(L_copy_8_bytes); |
2313 __ inccc(count, 2); | |
2314 __ brx(Assembler::zero, true, Assembler::pn, L_exit ); | |
2315 __ delayed()->mov(offset0, offset8); // Set O5 used by other stubs | |
2316 __ ldx(from, offset0, O3); | |
2317 __ stx(O3, to, offset0); | |
2318 __ BIND(L_exit); | |
2319 } | |
2320 | |
2321 // | |
2322 // Generate stub for disjoint long copy. | |
2323 // "aligned" is ignored, because we must make the stronger | |
2324 // assumption that both addresses are always 64-bit aligned. | |
2325 // | |
2326 // Arguments for generated stub: | |
2327 // from: O0 | |
2328 // to: O1 | |
2329 // count: O2 treated as signed | |
2330 // | |
2313
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2331 address generate_disjoint_long_copy(bool aligned, address *entry, const char *name) { |
0 | 2332 __ align(CodeEntryAlignment); |
2333 StubCodeMark mark(this, "StubRoutines", name); | |
2334 address start = __ pc(); | |
2335 | |
2336 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
2337 | |
2313
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2338 if (entry != NULL) { |
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2339 *entry = __ pc(); |
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2340 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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2341 BLOCK_COMMENT("Entry:"); |
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2342 } |
0 | 2343 |
2344 generate_disjoint_long_copy_core(aligned); | |
2345 | |
2346 // O3, O4 are used as temp registers | |
2347 inc_counter_np(SharedRuntime::_jlong_array_copy_ctr, O3, O4); | |
2348 __ retl(); | |
2349 __ delayed()->mov(G0, O0); // return 0 | |
2350 return start; | |
2351 } | |
2352 | |
2353 // | |
2354 // Generate core code for conjoint long copy (and oop copy on 64-bit). | |
2355 // "aligned" is ignored, because we must make the stronger | |
2356 // assumption that both addresses are always 64-bit aligned. | |
2357 // | |
2358 // Arguments: | |
2359 // from: O0 | |
2360 // to: O1 | |
2361 // count: O2 treated as signed | |
2362 // | |
2363 void generate_conjoint_long_copy_core(bool aligned) { | |
2364 // Do reverse copy. | |
2365 Label L_copy_8_bytes, L_copy_16_bytes, L_exit; | |
2366 const Register from = O0; // source array address | |
2367 const Register to = O1; // destination array address | |
2368 const Register count = O2; // elements count | |
2369 const Register offset8 = O4; // element offset | |
2370 const Register offset0 = O5; // previous element offset | |
2371 | |
2372 __ subcc(count, 1, count); | |
2373 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_8_bytes ); | |
2374 __ delayed()->sllx(count, LogBytesPerLong, offset8); | |
2375 __ sub(offset8, 8, offset0); | |
1365 | 2376 __ align(OptoLoopAlignment); |
0 | 2377 __ BIND(L_copy_16_bytes); |
2378 __ ldx(from, offset8, O2); | |
2379 __ ldx(from, offset0, O3); | |
2380 __ stx(O2, to, offset8); | |
2381 __ deccc(offset8, 16); // use offset8 as counter | |
2382 __ stx(O3, to, offset0); | |
2383 __ brx(Assembler::greater, false, Assembler::pt, L_copy_16_bytes); | |
2384 __ delayed()->dec(offset0, 16); | |
2385 | |
2386 __ BIND(L_copy_8_bytes); | |
2387 __ brx(Assembler::negative, false, Assembler::pn, L_exit ); | |
2388 __ delayed()->nop(); | |
2389 __ ldx(from, 0, O3); | |
2390 __ stx(O3, to, 0); | |
2391 __ BIND(L_exit); | |
2392 } | |
2393 | |
2394 // Generate stub for conjoint long copy. | |
2395 // "aligned" is ignored, because we must make the stronger | |
2396 // assumption that both addresses are always 64-bit aligned. | |
2397 // | |
2398 // Arguments for generated stub: | |
2399 // from: O0 | |
2400 // to: O1 | |
2401 // count: O2 treated as signed | |
2402 // | |
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2403 address generate_conjoint_long_copy(bool aligned, address nooverlap_target, |
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2404 address *entry, const char *name) { |
0 | 2405 __ align(CodeEntryAlignment); |
2406 StubCodeMark mark(this, "StubRoutines", name); | |
2407 address start = __ pc(); | |
2408 | |
2324 | 2409 assert(aligned, "Should always be aligned"); |
0 | 2410 |
2411 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
2412 | |
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2413 if (entry != NULL) { |
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2414 *entry = __ pc(); |
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2415 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) |
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2416 BLOCK_COMMENT("Entry:"); |
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2417 } |
0 | 2418 |
2419 array_overlap_test(nooverlap_target, 3); | |
2420 | |
2421 generate_conjoint_long_copy_core(aligned); | |
2422 | |
2423 // O3, O4 are used as temp registers | |
2424 inc_counter_np(SharedRuntime::_jlong_array_copy_ctr, O3, O4); | |
2425 __ retl(); | |
2426 __ delayed()->mov(G0, O0); // return 0 | |
2427 return start; | |
2428 } | |
2429 | |
2430 // Generate stub for disjoint oop copy. If "aligned" is true, the | |
2431 // "from" and "to" addresses are assumed to be heapword aligned. | |
2432 // | |
2433 // Arguments for generated stub: | |
2434 // from: O0 | |
2435 // to: O1 | |
2436 // count: O2 treated as signed | |
2437 // | |
2324 | 2438 address generate_disjoint_oop_copy(bool aligned, address *entry, const char *name, |
2439 bool dest_uninitialized = false) { | |
0 | 2440 |
2441 const Register from = O0; // source array address | |
2442 const Register to = O1; // destination array address | |
2443 const Register count = O2; // elements count | |
2444 | |
2445 __ align(CodeEntryAlignment); | |
2446 StubCodeMark mark(this, "StubRoutines", name); | |
2447 address start = __ pc(); | |
2448 | |
2449 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
2450 | |
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2451 if (entry != NULL) { |
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2452 *entry = __ pc(); |
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2453 // caller can pass a 64-bit byte count here |
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2454 BLOCK_COMMENT("Entry:"); |
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2455 } |
0 | 2456 |
2457 // save arguments for barrier generation | |
2458 __ mov(to, G1); | |
2459 __ mov(count, G5); | |
2324 | 2460 gen_write_ref_array_pre_barrier(G1, G5, dest_uninitialized); |
0 | 2461 #ifdef _LP64 |
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2462 assert_clean_int(count, O3); // Make sure 'count' is clean int. |
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2463 if (UseCompressedOops) { |
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2464 generate_disjoint_int_copy_core(aligned); |
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2465 } else { |
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2466 generate_disjoint_long_copy_core(aligned); |
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2467 } |
0 | 2468 #else |
2469 generate_disjoint_int_copy_core(aligned); | |
2470 #endif | |
2471 // O0 is used as temp register | |
2472 gen_write_ref_array_post_barrier(G1, G5, O0); | |
2473 | |
2474 // O3, O4 are used as temp registers | |
2475 inc_counter_np(SharedRuntime::_oop_array_copy_ctr, O3, O4); | |
2476 __ retl(); | |
2477 __ delayed()->mov(G0, O0); // return 0 | |
2478 return start; | |
2479 } | |
2480 | |
2481 // Generate stub for conjoint oop copy. If "aligned" is true, the | |
2482 // "from" and "to" addresses are assumed to be heapword aligned. | |
2483 // | |
2484 // Arguments for generated stub: | |
2485 // from: O0 | |
2486 // to: O1 | |
2487 // count: O2 treated as signed | |
2488 // | |
2313
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2489 address generate_conjoint_oop_copy(bool aligned, address nooverlap_target, |
2324 | 2490 address *entry, const char *name, |
2491 bool dest_uninitialized = false) { | |
0 | 2492 |
2493 const Register from = O0; // source array address | |
2494 const Register to = O1; // destination array address | |
2495 const Register count = O2; // elements count | |
2496 | |
2497 __ align(CodeEntryAlignment); | |
2498 StubCodeMark mark(this, "StubRoutines", name); | |
2499 address start = __ pc(); | |
2500 | |
2501 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
2502 | |
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2503 if (entry != NULL) { |
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2504 *entry = __ pc(); |
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2505 // caller can pass a 64-bit byte count here |
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2506 BLOCK_COMMENT("Entry:"); |
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2507 } |
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2508 |
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2509 array_overlap_test(nooverlap_target, LogBytesPerHeapOop); |
0 | 2510 |
2511 // save arguments for barrier generation | |
2512 __ mov(to, G1); | |
2513 __ mov(count, G5); | |
2324 | 2514 gen_write_ref_array_pre_barrier(G1, G5, dest_uninitialized); |
0 | 2515 |
2516 #ifdef _LP64 | |
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2517 if (UseCompressedOops) { |
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2518 generate_conjoint_int_copy_core(aligned); |
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2519 } else { |
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2520 generate_conjoint_long_copy_core(aligned); |
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2521 } |
0 | 2522 #else |
2523 generate_conjoint_int_copy_core(aligned); | |
2524 #endif | |
2525 | |
2526 // O0 is used as temp register | |
2527 gen_write_ref_array_post_barrier(G1, G5, O0); | |
2528 | |
2529 // O3, O4 are used as temp registers | |
2530 inc_counter_np(SharedRuntime::_oop_array_copy_ctr, O3, O4); | |
2531 __ retl(); | |
2532 __ delayed()->mov(G0, O0); // return 0 | |
2533 return start; | |
2534 } | |
2535 | |
2536 | |
2537 // Helper for generating a dynamic type check. | |
2538 // Smashes only the given temp registers. | |
2539 void generate_type_check(Register sub_klass, | |
2540 Register super_check_offset, | |
2541 Register super_klass, | |
2542 Register temp, | |
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2543 Label& L_success) { |
0 | 2544 assert_different_registers(sub_klass, super_check_offset, super_klass, temp); |
2545 | |
2546 BLOCK_COMMENT("type_check:"); | |
2547 | |
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2548 Label L_miss, L_pop_to_miss; |
0 | 2549 |
2550 assert_clean_int(super_check_offset, temp); | |
2551 | |
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2552 __ check_klass_subtype_fast_path(sub_klass, super_klass, temp, noreg, |
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2553 &L_success, &L_miss, NULL, |
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2554 super_check_offset); |
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2555 |
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2556 BLOCK_COMMENT("type_check_slow_path:"); |
0 | 2557 __ save_frame(0); |
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2558 __ check_klass_subtype_slow_path(sub_klass->after_save(), |
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2559 super_klass->after_save(), |
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2560 L0, L1, L2, L4, |
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2561 NULL, &L_pop_to_miss); |
3839 | 2562 __ ba(L_success); |
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2563 __ delayed()->restore(); |
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2564 |
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2565 __ bind(L_pop_to_miss); |
0 | 2566 __ restore(); |
2567 | |
2568 // Fall through on failure! | |
2569 __ BIND(L_miss); | |
2570 } | |
2571 | |
2572 | |
2573 // Generate stub for checked oop copy. | |
2574 // | |
2575 // Arguments for generated stub: | |
2576 // from: O0 | |
2577 // to: O1 | |
2578 // count: O2 treated as signed | |
2579 // ckoff: O3 (super_check_offset) | |
2580 // ckval: O4 (super_klass) | |
2581 // ret: O0 zero for success; (-1^K) where K is partial transfer count | |
2582 // | |
2324 | 2583 address generate_checkcast_copy(const char *name, address *entry, bool dest_uninitialized = false) { |
0 | 2584 |
2585 const Register O0_from = O0; // source array address | |
2586 const Register O1_to = O1; // destination array address | |
2587 const Register O2_count = O2; // elements count | |
2588 const Register O3_ckoff = O3; // super_check_offset | |
2589 const Register O4_ckval = O4; // super_klass | |
2590 | |
2591 const Register O5_offset = O5; // loop var, with stride wordSize | |
2592 const Register G1_remain = G1; // loop var, with stride -1 | |
2593 const Register G3_oop = G3; // actual oop copied | |
2594 const Register G4_klass = G4; // oop._klass | |
2595 const Register G5_super = G5; // oop._klass._primary_supers[ckval] | |
2596 | |
2597 __ align(CodeEntryAlignment); | |
2598 StubCodeMark mark(this, "StubRoutines", name); | |
2599 address start = __ pc(); | |
2600 | |
2601 #ifdef ASSERT | |
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2602 // We sometimes save a frame (see generate_type_check below). |
0 | 2603 // If this will cause trouble, let's fail now instead of later. |
2604 __ save_frame(0); | |
2605 __ restore(); | |
2606 #endif | |
2607 | |
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2608 assert_clean_int(O2_count, G1); // Make sure 'count' is clean int. |
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2609 |
0 | 2610 #ifdef ASSERT |
2611 // caller guarantees that the arrays really are different | |
2612 // otherwise, we would have to make conjoint checks | |
2613 { Label L; | |
2614 __ mov(O3, G1); // spill: overlap test smashes O3 | |
2615 __ mov(O4, G4); // spill: overlap test smashes O4 | |
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2616 array_overlap_test(L, LogBytesPerHeapOop); |
0 | 2617 __ stop("checkcast_copy within a single array"); |
2618 __ bind(L); | |
2619 __ mov(G1, O3); | |
2620 __ mov(G4, O4); | |
2621 } | |
2622 #endif //ASSERT | |
2623 | |
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2624 if (entry != NULL) { |
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2625 *entry = __ pc(); |
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2626 // caller can pass a 64-bit byte count here (from generic stub) |
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2627 BLOCK_COMMENT("Entry:"); |
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2628 } |
2324 | 2629 gen_write_ref_array_pre_barrier(O1_to, O2_count, dest_uninitialized); |
0 | 2630 |
2631 Label load_element, store_element, do_card_marks, fail, done; | |
2632 __ addcc(O2_count, 0, G1_remain); // initialize loop index, and test it | |
2633 __ brx(Assembler::notZero, false, Assembler::pt, load_element); | |
2634 __ delayed()->mov(G0, O5_offset); // offset from start of arrays | |
2635 | |
2636 // Empty array: Nothing to do. | |
2637 inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr, O3, O4); | |
2638 __ retl(); | |
2639 __ delayed()->set(0, O0); // return 0 on (trivial) success | |
2640 | |
2641 // ======== begin loop ======== | |
2642 // (Loop is rotated; its entry is load_element.) | |
2643 // Loop variables: | |
2644 // (O5 = 0; ; O5 += wordSize) --- offset from src, dest arrays | |
2645 // (O2 = len; O2 != 0; O2--) --- number of oops *remaining* | |
2646 // G3, G4, G5 --- current oop, oop.klass, oop.klass.super | |
1365 | 2647 __ align(OptoLoopAlignment); |
0 | 2648 |
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2649 __ BIND(store_element); |
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2650 __ deccc(G1_remain); // decrement the count |
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2651 __ store_heap_oop(G3_oop, O1_to, O5_offset); // store the oop |
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2652 __ inc(O5_offset, heapOopSize); // step to next offset |
0 | 2653 __ brx(Assembler::zero, true, Assembler::pt, do_card_marks); |
2654 __ delayed()->set(0, O0); // return -1 on success | |
2655 | |
2656 // ======== loop entry is here ======== | |
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2657 __ BIND(load_element); |
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2658 __ load_heap_oop(O0_from, O5_offset, G3_oop); // load the oop |
3839 | 2659 __ br_null_short(G3_oop, Assembler::pt, store_element); |
0 | 2660 |
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2661 __ load_klass(G3_oop, G4_klass); // query the object klass |
0 | 2662 |
2663 generate_type_check(G4_klass, O3_ckoff, O4_ckval, G5_super, | |
2664 // branch to this on success: | |
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2665 store_element); |
0 | 2666 // ======== end loop ======== |
2667 | |
2668 // It was a real error; we must depend on the caller to finish the job. | |
2669 // Register G1 has number of *remaining* oops, O2 number of *total* oops. | |
2670 // Emit GC store barriers for the oops we have copied (O2 minus G1), | |
2671 // and report their number to the caller. | |
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2672 __ BIND(fail); |
0 | 2673 __ subcc(O2_count, G1_remain, O2_count); |
2674 __ brx(Assembler::zero, false, Assembler::pt, done); | |
2675 __ delayed()->not1(O2_count, O0); // report (-1^K) to caller | |
2676 | |
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2677 __ BIND(do_card_marks); |
0 | 2678 gen_write_ref_array_post_barrier(O1_to, O2_count, O3); // store check on O1[0..O2] |
2679 | |
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2680 __ BIND(done); |
0 | 2681 inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr, O3, O4); |
2682 __ retl(); | |
2683 __ delayed()->nop(); // return value in 00 | |
2684 | |
2685 return start; | |
2686 } | |
2687 | |
2688 | |
2689 // Generate 'unsafe' array copy stub | |
2690 // Though just as safe as the other stubs, it takes an unscaled | |
2691 // size_t argument instead of an element count. | |
2692 // | |
2693 // Arguments for generated stub: | |
2694 // from: O0 | |
2695 // to: O1 | |
2696 // count: O2 byte count, treated as ssize_t, can be zero | |
2697 // | |
2698 // Examines the alignment of the operands and dispatches | |
2699 // to a long, int, short, or byte copy loop. | |
2700 // | |
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2701 address generate_unsafe_copy(const char* name, |
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2702 address byte_copy_entry, |
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2703 address short_copy_entry, |
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2704 address int_copy_entry, |
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2705 address long_copy_entry) { |
0 | 2706 |
2707 const Register O0_from = O0; // source array address | |
2708 const Register O1_to = O1; // destination array address | |
2709 const Register O2_count = O2; // elements count | |
2710 | |
2711 const Register G1_bits = G1; // test copy of low bits | |
2712 | |
2713 __ align(CodeEntryAlignment); | |
2714 StubCodeMark mark(this, "StubRoutines", name); | |
2715 address start = __ pc(); | |
2716 | |
2717 // bump this on entry, not on exit: | |
2718 inc_counter_np(SharedRuntime::_unsafe_array_copy_ctr, G1, G3); | |
2719 | |
2720 __ or3(O0_from, O1_to, G1_bits); | |
2721 __ or3(O2_count, G1_bits, G1_bits); | |
2722 | |
2723 __ btst(BytesPerLong-1, G1_bits); | |
2724 __ br(Assembler::zero, true, Assembler::pt, | |
2725 long_copy_entry, relocInfo::runtime_call_type); | |
2726 // scale the count on the way out: | |
2727 __ delayed()->srax(O2_count, LogBytesPerLong, O2_count); | |
2728 | |
2729 __ btst(BytesPerInt-1, G1_bits); | |
2730 __ br(Assembler::zero, true, Assembler::pt, | |
2731 int_copy_entry, relocInfo::runtime_call_type); | |
2732 // scale the count on the way out: | |
2733 __ delayed()->srax(O2_count, LogBytesPerInt, O2_count); | |
2734 | |
2735 __ btst(BytesPerShort-1, G1_bits); | |
2736 __ br(Assembler::zero, true, Assembler::pt, | |
2737 short_copy_entry, relocInfo::runtime_call_type); | |
2738 // scale the count on the way out: | |
2739 __ delayed()->srax(O2_count, LogBytesPerShort, O2_count); | |
2740 | |
2741 __ br(Assembler::always, false, Assembler::pt, | |
2742 byte_copy_entry, relocInfo::runtime_call_type); | |
2743 __ delayed()->nop(); | |
2744 | |
2745 return start; | |
2746 } | |
2747 | |
2748 | |
2749 // Perform range checks on the proposed arraycopy. | |
2750 // Kills the two temps, but nothing else. | |
2751 // Also, clean the sign bits of src_pos and dst_pos. | |
2752 void arraycopy_range_checks(Register src, // source array oop (O0) | |
2753 Register src_pos, // source position (O1) | |
2754 Register dst, // destination array oo (O2) | |
2755 Register dst_pos, // destination position (O3) | |
2756 Register length, // length of copy (O4) | |
2757 Register temp1, Register temp2, | |
2758 Label& L_failed) { | |
2759 BLOCK_COMMENT("arraycopy_range_checks:"); | |
2760 | |
2761 // if (src_pos + length > arrayOop(src)->length() ) FAIL; | |
2762 | |
2763 const Register array_length = temp1; // scratch | |
2764 const Register end_pos = temp2; // scratch | |
2765 | |
2766 // Note: This next instruction may be in the delay slot of a branch: | |
2767 __ add(length, src_pos, end_pos); // src_pos + length | |
2768 __ lduw(src, arrayOopDesc::length_offset_in_bytes(), array_length); | |
2769 __ cmp(end_pos, array_length); | |
2770 __ br(Assembler::greater, false, Assembler::pn, L_failed); | |
2771 | |
2772 // if (dst_pos + length > arrayOop(dst)->length() ) FAIL; | |
2773 __ delayed()->add(length, dst_pos, end_pos); // dst_pos + length | |
2774 __ lduw(dst, arrayOopDesc::length_offset_in_bytes(), array_length); | |
2775 __ cmp(end_pos, array_length); | |
2776 __ br(Assembler::greater, false, Assembler::pn, L_failed); | |
2777 | |
2778 // Have to clean up high 32-bits of 'src_pos' and 'dst_pos'. | |
2779 // Move with sign extension can be used since they are positive. | |
2780 __ delayed()->signx(src_pos, src_pos); | |
2781 __ signx(dst_pos, dst_pos); | |
2782 | |
2783 BLOCK_COMMENT("arraycopy_range_checks done"); | |
2784 } | |
2785 | |
2786 | |
2787 // | |
2788 // Generate generic array copy stubs | |
2789 // | |
2790 // Input: | |
2791 // O0 - src oop | |
2792 // O1 - src_pos | |
2793 // O2 - dst oop | |
2794 // O3 - dst_pos | |
2795 // O4 - element count | |
2796 // | |
2797 // Output: | |
2798 // O0 == 0 - success | |
2799 // O0 == -1 - need to call System.arraycopy | |
2800 // | |
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2801 address generate_generic_copy(const char *name, |
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2802 address entry_jbyte_arraycopy, |
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2803 address entry_jshort_arraycopy, |
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2804 address entry_jint_arraycopy, |
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2805 address entry_oop_arraycopy, |
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2806 address entry_jlong_arraycopy, |
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2807 address entry_checkcast_arraycopy) { |
0 | 2808 Label L_failed, L_objArray; |
2809 | |
2810 // Input registers | |
2811 const Register src = O0; // source array oop | |
2812 const Register src_pos = O1; // source position | |
2813 const Register dst = O2; // destination array oop | |
2814 const Register dst_pos = O3; // destination position | |
2815 const Register length = O4; // elements count | |
2816 | |
2817 // registers used as temp | |
2818 const Register G3_src_klass = G3; // source array klass | |
2819 const Register G4_dst_klass = G4; // destination array klass | |
2820 const Register G5_lh = G5; // layout handler | |
2821 const Register O5_temp = O5; | |
2822 | |
2823 __ align(CodeEntryAlignment); | |
2824 StubCodeMark mark(this, "StubRoutines", name); | |
2825 address start = __ pc(); | |
2826 | |
2827 // bump this on entry, not on exit: | |
2828 inc_counter_np(SharedRuntime::_generic_array_copy_ctr, G1, G3); | |
2829 | |
2830 // In principle, the int arguments could be dirty. | |
2831 //assert_clean_int(src_pos, G1); | |
2832 //assert_clean_int(dst_pos, G1); | |
2833 //assert_clean_int(length, G1); | |
2834 | |
2835 //----------------------------------------------------------------------- | |
2836 // Assembler stubs will be used for this call to arraycopy | |
2837 // if the following conditions are met: | |
2838 // | |
2839 // (1) src and dst must not be null. | |
2840 // (2) src_pos must not be negative. | |
2841 // (3) dst_pos must not be negative. | |
2842 // (4) length must not be negative. | |
2843 // (5) src klass and dst klass should be the same and not NULL. | |
2844 // (6) src and dst should be arrays. | |
2845 // (7) src_pos + length must not exceed length of src. | |
2846 // (8) dst_pos + length must not exceed length of dst. | |
2847 BLOCK_COMMENT("arraycopy initial argument checks"); | |
2848 | |
2849 // if (src == NULL) return -1; | |
2850 __ br_null(src, false, Assembler::pn, L_failed); | |
2851 | |
2852 // if (src_pos < 0) return -1; | |
2853 __ delayed()->tst(src_pos); | |
2854 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
2855 __ delayed()->nop(); | |
2856 | |
2857 // if (dst == NULL) return -1; | |
2858 __ br_null(dst, false, Assembler::pn, L_failed); | |
2859 | |
2860 // if (dst_pos < 0) return -1; | |
2861 __ delayed()->tst(dst_pos); | |
2862 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
2863 | |
2864 // if (length < 0) return -1; | |
2865 __ delayed()->tst(length); | |
2866 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
2867 | |
2868 BLOCK_COMMENT("arraycopy argument klass checks"); | |
2869 // get src->klass() | |
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2870 if (UseCompressedOops) { |
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2871 __ delayed()->nop(); // ??? not good |
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2872 __ load_klass(src, G3_src_klass); |
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2873 } else { |
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2874 __ delayed()->ld_ptr(src, oopDesc::klass_offset_in_bytes(), G3_src_klass); |
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2875 } |
0 | 2876 |
2877 #ifdef ASSERT | |
2878 // assert(src->klass() != NULL); | |
2879 BLOCK_COMMENT("assert klasses not null"); | |
2880 { Label L_a, L_b; | |
3839 | 2881 __ br_notnull_short(G3_src_klass, Assembler::pt, L_b); // it is broken if klass is NULL |
0 | 2882 __ bind(L_a); |
2883 __ stop("broken null klass"); | |
2884 __ bind(L_b); | |
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2885 __ load_klass(dst, G4_dst_klass); |
0 | 2886 __ br_null(G4_dst_klass, false, Assembler::pn, L_a); // this would be broken also |
2887 __ delayed()->mov(G0, G4_dst_klass); // scribble the temp | |
2888 BLOCK_COMMENT("assert done"); | |
2889 } | |
2890 #endif | |
2891 | |
2892 // Load layout helper | |
2893 // | |
2894 // |array_tag| | header_size | element_type | |log2_element_size| | |
2895 // 32 30 24 16 8 2 0 | |
2896 // | |
2897 // array_tag: typeArray = 0x3, objArray = 0x2, non-array = 0x0 | |
2898 // | |
2899 | |
2900 int lh_offset = klassOopDesc::header_size() * HeapWordSize + | |
2901 Klass::layout_helper_offset_in_bytes(); | |
2902 | |
2903 // Load 32-bits signed value. Use br() instruction with it to check icc. | |
2904 __ lduw(G3_src_klass, lh_offset, G5_lh); | |
2905 | |
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2906 if (UseCompressedOops) { |
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2907 __ load_klass(dst, G4_dst_klass); |
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2908 } |
0 | 2909 // Handle objArrays completely differently... |
2910 juint objArray_lh = Klass::array_layout_helper(T_OBJECT); | |
2911 __ set(objArray_lh, O5_temp); | |
2912 __ cmp(G5_lh, O5_temp); | |
2913 __ br(Assembler::equal, false, Assembler::pt, L_objArray); | |
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2914 if (UseCompressedOops) { |
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2915 __ delayed()->nop(); |
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2916 } else { |
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2917 __ delayed()->ld_ptr(dst, oopDesc::klass_offset_in_bytes(), G4_dst_klass); |
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2918 } |
0 | 2919 |
2920 // if (src->klass() != dst->klass()) return -1; | |
3839 | 2921 __ cmp_and_brx_short(G3_src_klass, G4_dst_klass, Assembler::notEqual, Assembler::pn, L_failed); |
0 | 2922 |
2923 // if (!src->is_Array()) return -1; | |
2924 __ cmp(G5_lh, Klass::_lh_neutral_value); // < 0 | |
2925 __ br(Assembler::greaterEqual, false, Assembler::pn, L_failed); | |
2926 | |
2927 // At this point, it is known to be a typeArray (array_tag 0x3). | |
2928 #ifdef ASSERT | |
2929 __ delayed()->nop(); | |
2930 { Label L; | |
2931 jint lh_prim_tag_in_place = (Klass::_lh_array_tag_type_value << Klass::_lh_array_tag_shift); | |
2932 __ set(lh_prim_tag_in_place, O5_temp); | |
2933 __ cmp(G5_lh, O5_temp); | |
2934 __ br(Assembler::greaterEqual, false, Assembler::pt, L); | |
2935 __ delayed()->nop(); | |
2936 __ stop("must be a primitive array"); | |
2937 __ bind(L); | |
2938 } | |
2939 #else | |
2940 __ delayed(); // match next insn to prev branch | |
2941 #endif | |
2942 | |
2943 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
2944 O5_temp, G4_dst_klass, L_failed); | |
2945 | |
2946 // typeArrayKlass | |
2947 // | |
2948 // src_addr = (src + array_header_in_bytes()) + (src_pos << log2elemsize); | |
2949 // dst_addr = (dst + array_header_in_bytes()) + (dst_pos << log2elemsize); | |
2950 // | |
2951 | |
2952 const Register G4_offset = G4_dst_klass; // array offset | |
2953 const Register G3_elsize = G3_src_klass; // log2 element size | |
2954 | |
2955 __ srl(G5_lh, Klass::_lh_header_size_shift, G4_offset); | |
2956 __ and3(G4_offset, Klass::_lh_header_size_mask, G4_offset); // array_offset | |
2957 __ add(src, G4_offset, src); // src array offset | |
2958 __ add(dst, G4_offset, dst); // dst array offset | |
2959 __ and3(G5_lh, Klass::_lh_log2_element_size_mask, G3_elsize); // log2 element size | |
2960 | |
2961 // next registers should be set before the jump to corresponding stub | |
2962 const Register from = O0; // source array address | |
2963 const Register to = O1; // destination array address | |
2964 const Register count = O2; // elements count | |
2965 | |
2966 // 'from', 'to', 'count' registers should be set in this order | |
2967 // since they are the same as 'src', 'src_pos', 'dst'. | |
2968 | |
2969 BLOCK_COMMENT("scale indexes to element size"); | |
2970 __ sll_ptr(src_pos, G3_elsize, src_pos); | |
2971 __ sll_ptr(dst_pos, G3_elsize, dst_pos); | |
2972 __ add(src, src_pos, from); // src_addr | |
2973 __ add(dst, dst_pos, to); // dst_addr | |
2974 | |
2975 BLOCK_COMMENT("choose copy loop based on element size"); | |
2976 __ cmp(G3_elsize, 0); | |
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2977 __ br(Assembler::equal, true, Assembler::pt, entry_jbyte_arraycopy); |
0 | 2978 __ delayed()->signx(length, count); // length |
2979 | |
2980 __ cmp(G3_elsize, LogBytesPerShort); | |
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2981 __ br(Assembler::equal, true, Assembler::pt, entry_jshort_arraycopy); |
0 | 2982 __ delayed()->signx(length, count); // length |
2983 | |
2984 __ cmp(G3_elsize, LogBytesPerInt); | |
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2985 __ br(Assembler::equal, true, Assembler::pt, entry_jint_arraycopy); |
0 | 2986 __ delayed()->signx(length, count); // length |
2987 #ifdef ASSERT | |
2988 { Label L; | |
3839 | 2989 __ cmp_and_br_short(G3_elsize, LogBytesPerLong, Assembler::equal, Assembler::pt, L); |
0 | 2990 __ stop("must be long copy, but elsize is wrong"); |
2991 __ bind(L); | |
2992 } | |
2993 #endif | |
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2994 __ br(Assembler::always, false, Assembler::pt, entry_jlong_arraycopy); |
0 | 2995 __ delayed()->signx(length, count); // length |
2996 | |
2997 // objArrayKlass | |
2998 __ BIND(L_objArray); | |
2999 // live at this point: G3_src_klass, G4_dst_klass, src[_pos], dst[_pos], length | |
3000 | |
3001 Label L_plain_copy, L_checkcast_copy; | |
3002 // test array classes for subtyping | |
3003 __ cmp(G3_src_klass, G4_dst_klass); // usual case is exact equality | |
3004 __ brx(Assembler::notEqual, true, Assembler::pn, L_checkcast_copy); | |
3005 __ delayed()->lduw(G4_dst_klass, lh_offset, O5_temp); // hoisted from below | |
3006 | |
3007 // Identically typed arrays can be copied without element-wise checks. | |
3008 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
3009 O5_temp, G5_lh, L_failed); | |
3010 | |
3011 __ add(src, arrayOopDesc::base_offset_in_bytes(T_OBJECT), src); //src offset | |
3012 __ add(dst, arrayOopDesc::base_offset_in_bytes(T_OBJECT), dst); //dst offset | |
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3013 __ sll_ptr(src_pos, LogBytesPerHeapOop, src_pos); |
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3014 __ sll_ptr(dst_pos, LogBytesPerHeapOop, dst_pos); |
0 | 3015 __ add(src, src_pos, from); // src_addr |
3016 __ add(dst, dst_pos, to); // dst_addr | |
3017 __ BIND(L_plain_copy); | |
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3018 __ br(Assembler::always, false, Assembler::pt, entry_oop_arraycopy); |
0 | 3019 __ delayed()->signx(length, count); // length |
3020 | |
3021 __ BIND(L_checkcast_copy); | |
3022 // live at this point: G3_src_klass, G4_dst_klass | |
3023 { | |
3024 // Before looking at dst.length, make sure dst is also an objArray. | |
3025 // lduw(G4_dst_klass, lh_offset, O5_temp); // hoisted to delay slot | |
3026 __ cmp(G5_lh, O5_temp); | |
3027 __ br(Assembler::notEqual, false, Assembler::pn, L_failed); | |
3028 | |
3029 // It is safe to examine both src.length and dst.length. | |
3030 __ delayed(); // match next insn to prev branch | |
3031 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
3032 O5_temp, G5_lh, L_failed); | |
3033 | |
3034 // Marshal the base address arguments now, freeing registers. | |
3035 __ add(src, arrayOopDesc::base_offset_in_bytes(T_OBJECT), src); //src offset | |
3036 __ add(dst, arrayOopDesc::base_offset_in_bytes(T_OBJECT), dst); //dst offset | |
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3037 __ sll_ptr(src_pos, LogBytesPerHeapOop, src_pos); |
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3038 __ sll_ptr(dst_pos, LogBytesPerHeapOop, dst_pos); |
0 | 3039 __ add(src, src_pos, from); // src_addr |
3040 __ add(dst, dst_pos, to); // dst_addr | |
3041 __ signx(length, count); // length (reloaded) | |
3042 | |
3043 Register sco_temp = O3; // this register is free now | |
3044 assert_different_registers(from, to, count, sco_temp, | |
3045 G4_dst_klass, G3_src_klass); | |
3046 | |
3047 // Generate the type check. | |
3048 int sco_offset = (klassOopDesc::header_size() * HeapWordSize + | |
3049 Klass::super_check_offset_offset_in_bytes()); | |
3050 __ lduw(G4_dst_klass, sco_offset, sco_temp); | |
3051 generate_type_check(G3_src_klass, sco_temp, G4_dst_klass, | |
3052 O5_temp, L_plain_copy); | |
3053 | |
3054 // Fetch destination element klass from the objArrayKlass header. | |
3055 int ek_offset = (klassOopDesc::header_size() * HeapWordSize + | |
3056 objArrayKlass::element_klass_offset_in_bytes()); | |
3057 | |
3058 // the checkcast_copy loop needs two extra arguments: | |
3059 __ ld_ptr(G4_dst_klass, ek_offset, O4); // dest elem klass | |
3060 // lduw(O4, sco_offset, O3); // sco of elem klass | |
3061 | |
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3062 __ br(Assembler::always, false, Assembler::pt, entry_checkcast_arraycopy); |
0 | 3063 __ delayed()->lduw(O4, sco_offset, O3); |
3064 } | |
3065 | |
3066 __ BIND(L_failed); | |
3067 __ retl(); | |
3068 __ delayed()->sub(G0, 1, O0); // return -1 | |
3069 return start; | |
3070 } | |
3071 | |
3072 void generate_arraycopy_stubs() { | |
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3073 address entry; |
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3074 address entry_jbyte_arraycopy; |
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3075 address entry_jshort_arraycopy; |
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3076 address entry_jint_arraycopy; |
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3077 address entry_oop_arraycopy; |
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3078 address entry_jlong_arraycopy; |
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3079 address entry_checkcast_arraycopy; |
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3080 |
2324 | 3081 //*** jbyte |
3082 // Always need aligned and unaligned versions | |
3083 StubRoutines::_jbyte_disjoint_arraycopy = generate_disjoint_byte_copy(false, &entry, | |
3084 "jbyte_disjoint_arraycopy"); | |
3085 StubRoutines::_jbyte_arraycopy = generate_conjoint_byte_copy(false, entry, | |
3086 &entry_jbyte_arraycopy, | |
3087 "jbyte_arraycopy"); | |
3088 StubRoutines::_arrayof_jbyte_disjoint_arraycopy = generate_disjoint_byte_copy(true, &entry, | |
3089 "arrayof_jbyte_disjoint_arraycopy"); | |
3090 StubRoutines::_arrayof_jbyte_arraycopy = generate_conjoint_byte_copy(true, entry, NULL, | |
3091 "arrayof_jbyte_arraycopy"); | |
3092 | |
3093 //*** jshort | |
3094 // Always need aligned and unaligned versions | |
3095 StubRoutines::_jshort_disjoint_arraycopy = generate_disjoint_short_copy(false, &entry, | |
3096 "jshort_disjoint_arraycopy"); | |
3097 StubRoutines::_jshort_arraycopy = generate_conjoint_short_copy(false, entry, | |
3098 &entry_jshort_arraycopy, | |
3099 "jshort_arraycopy"); | |
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3100 StubRoutines::_arrayof_jshort_disjoint_arraycopy = generate_disjoint_short_copy(true, &entry, |
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3101 "arrayof_jshort_disjoint_arraycopy"); |
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3102 StubRoutines::_arrayof_jshort_arraycopy = generate_conjoint_short_copy(true, entry, NULL, |
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3103 "arrayof_jshort_arraycopy"); |
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3104 |
2324 | 3105 //*** jint |
3106 // Aligned versions | |
3107 StubRoutines::_arrayof_jint_disjoint_arraycopy = generate_disjoint_int_copy(true, &entry, | |
3108 "arrayof_jint_disjoint_arraycopy"); | |
3109 StubRoutines::_arrayof_jint_arraycopy = generate_conjoint_int_copy(true, entry, &entry_jint_arraycopy, | |
3110 "arrayof_jint_arraycopy"); | |
0 | 3111 #ifdef _LP64 |
2324 | 3112 // In 64 bit we need both aligned and unaligned versions of jint arraycopy. |
3113 // entry_jint_arraycopy always points to the unaligned version (notice that we overwrite it). | |
3114 StubRoutines::_jint_disjoint_arraycopy = generate_disjoint_int_copy(false, &entry, | |
3115 "jint_disjoint_arraycopy"); | |
3116 StubRoutines::_jint_arraycopy = generate_conjoint_int_copy(false, entry, | |
3117 &entry_jint_arraycopy, | |
3118 "jint_arraycopy"); | |
3119 #else | |
3120 // In 32 bit jints are always HeapWordSize aligned, so always use the aligned version | |
3121 // (in fact in 32bit we always have a pre-loop part even in the aligned version, | |
3122 // because it uses 64-bit loads/stores, so the aligned flag is actually ignored). | |
3123 StubRoutines::_jint_disjoint_arraycopy = StubRoutines::_arrayof_jint_disjoint_arraycopy; | |
3124 StubRoutines::_jint_arraycopy = StubRoutines::_arrayof_jint_arraycopy; | |
0 | 3125 #endif |
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3126 |
2324 | 3127 |
3128 //*** jlong | |
3129 // It is always aligned | |
3130 StubRoutines::_arrayof_jlong_disjoint_arraycopy = generate_disjoint_long_copy(true, &entry, | |
3131 "arrayof_jlong_disjoint_arraycopy"); | |
3132 StubRoutines::_arrayof_jlong_arraycopy = generate_conjoint_long_copy(true, entry, &entry_jlong_arraycopy, | |
3133 "arrayof_jlong_arraycopy"); | |
3134 StubRoutines::_jlong_disjoint_arraycopy = StubRoutines::_arrayof_jlong_disjoint_arraycopy; | |
3135 StubRoutines::_jlong_arraycopy = StubRoutines::_arrayof_jlong_arraycopy; | |
3136 | |
3137 | |
3138 //*** oops | |
3139 // Aligned versions | |
3140 StubRoutines::_arrayof_oop_disjoint_arraycopy = generate_disjoint_oop_copy(true, &entry, | |
3141 "arrayof_oop_disjoint_arraycopy"); | |
3142 StubRoutines::_arrayof_oop_arraycopy = generate_conjoint_oop_copy(true, entry, &entry_oop_arraycopy, | |
3143 "arrayof_oop_arraycopy"); | |
3144 // Aligned versions without pre-barriers | |
3145 StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = generate_disjoint_oop_copy(true, &entry, | |
3146 "arrayof_oop_disjoint_arraycopy_uninit", | |
3147 /*dest_uninitialized*/true); | |
3148 StubRoutines::_arrayof_oop_arraycopy_uninit = generate_conjoint_oop_copy(true, entry, NULL, | |
3149 "arrayof_oop_arraycopy_uninit", | |
3150 /*dest_uninitialized*/true); | |
3151 #ifdef _LP64 | |
3152 if (UseCompressedOops) { | |
3153 // With compressed oops we need unaligned versions, notice that we overwrite entry_oop_arraycopy. | |
3154 StubRoutines::_oop_disjoint_arraycopy = generate_disjoint_oop_copy(false, &entry, | |
3155 "oop_disjoint_arraycopy"); | |
3156 StubRoutines::_oop_arraycopy = generate_conjoint_oop_copy(false, entry, &entry_oop_arraycopy, | |
3157 "oop_arraycopy"); | |
3158 // Unaligned versions without pre-barriers | |
3159 StubRoutines::_oop_disjoint_arraycopy_uninit = generate_disjoint_oop_copy(false, &entry, | |
3160 "oop_disjoint_arraycopy_uninit", | |
3161 /*dest_uninitialized*/true); | |
3162 StubRoutines::_oop_arraycopy_uninit = generate_conjoint_oop_copy(false, entry, NULL, | |
3163 "oop_arraycopy_uninit", | |
3164 /*dest_uninitialized*/true); | |
3165 } else | |
3166 #endif | |
3167 { | |
3168 // oop arraycopy is always aligned on 32bit and 64bit without compressed oops | |
3169 StubRoutines::_oop_disjoint_arraycopy = StubRoutines::_arrayof_oop_disjoint_arraycopy; | |
3170 StubRoutines::_oop_arraycopy = StubRoutines::_arrayof_oop_arraycopy; | |
3171 StubRoutines::_oop_disjoint_arraycopy_uninit = StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit; | |
3172 StubRoutines::_oop_arraycopy_uninit = StubRoutines::_arrayof_oop_arraycopy_uninit; | |
3173 } | |
3174 | |
3175 StubRoutines::_checkcast_arraycopy = generate_checkcast_copy("checkcast_arraycopy", &entry_checkcast_arraycopy); | |
3176 StubRoutines::_checkcast_arraycopy_uninit = generate_checkcast_copy("checkcast_arraycopy_uninit", NULL, | |
3177 /*dest_uninitialized*/true); | |
3178 | |
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3179 StubRoutines::_unsafe_arraycopy = generate_unsafe_copy("unsafe_arraycopy", |
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3180 entry_jbyte_arraycopy, |
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3181 entry_jshort_arraycopy, |
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3182 entry_jint_arraycopy, |
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3183 entry_jlong_arraycopy); |
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3184 StubRoutines::_generic_arraycopy = generate_generic_copy("generic_arraycopy", |
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3185 entry_jbyte_arraycopy, |
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3186 entry_jshort_arraycopy, |
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3187 entry_jint_arraycopy, |
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3188 entry_oop_arraycopy, |
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3189 entry_jlong_arraycopy, |
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3190 entry_checkcast_arraycopy); |
1763 | 3191 |
3192 StubRoutines::_jbyte_fill = generate_fill(T_BYTE, false, "jbyte_fill"); | |
3193 StubRoutines::_jshort_fill = generate_fill(T_SHORT, false, "jshort_fill"); | |
3194 StubRoutines::_jint_fill = generate_fill(T_INT, false, "jint_fill"); | |
3195 StubRoutines::_arrayof_jbyte_fill = generate_fill(T_BYTE, true, "arrayof_jbyte_fill"); | |
3196 StubRoutines::_arrayof_jshort_fill = generate_fill(T_SHORT, true, "arrayof_jshort_fill"); | |
3197 StubRoutines::_arrayof_jint_fill = generate_fill(T_INT, true, "arrayof_jint_fill"); | |
0 | 3198 } |
3199 | |
3200 void generate_initial() { | |
3201 // Generates all stubs and initializes the entry points | |
3202 | |
3203 //------------------------------------------------------------------------------------------------------------------------ | |
3204 // entry points that exist in all platforms | |
3205 // Note: This is code that could be shared among different platforms - however the benefit seems to be smaller than | |
3206 // the disadvantage of having a much more complicated generator structure. See also comment in stubRoutines.hpp. | |
3207 StubRoutines::_forward_exception_entry = generate_forward_exception(); | |
3208 | |
3209 StubRoutines::_call_stub_entry = generate_call_stub(StubRoutines::_call_stub_return_address); | |
3210 StubRoutines::_catch_exception_entry = generate_catch_exception(); | |
3211 | |
3212 //------------------------------------------------------------------------------------------------------------------------ | |
3213 // entry points that are platform specific | |
3214 StubRoutines::Sparc::_test_stop_entry = generate_test_stop(); | |
3215 | |
3216 StubRoutines::Sparc::_stop_subroutine_entry = generate_stop_subroutine(); | |
3217 StubRoutines::Sparc::_flush_callers_register_windows_entry = generate_flush_callers_register_windows(); | |
3218 | |
3219 #if !defined(COMPILER2) && !defined(_LP64) | |
3220 StubRoutines::_atomic_xchg_entry = generate_atomic_xchg(); | |
3221 StubRoutines::_atomic_cmpxchg_entry = generate_atomic_cmpxchg(); | |
3222 StubRoutines::_atomic_add_entry = generate_atomic_add(); | |
3223 StubRoutines::_atomic_xchg_ptr_entry = StubRoutines::_atomic_xchg_entry; | |
3224 StubRoutines::_atomic_cmpxchg_ptr_entry = StubRoutines::_atomic_cmpxchg_entry; | |
3225 StubRoutines::_atomic_cmpxchg_long_entry = generate_atomic_cmpxchg_long(); | |
3226 StubRoutines::_atomic_add_ptr_entry = StubRoutines::_atomic_add_entry; | |
3227 #endif // COMPILER2 !=> _LP64 | |
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3228 |
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3229 // Build this early so it's available for the interpreter. The |
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|
3230 // stub expects the required and actual type to already be in O1 |
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7055355: JSR 292: crash while throwing WrongMethodTypeException
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|
3231 // and O2 respectively. |
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|
3232 StubRoutines::_throw_WrongMethodTypeException_entry = |
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diff
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|
3233 generate_throw_exception("WrongMethodTypeException throw_exception", |
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diff
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|
3234 CAST_FROM_FN_PTR(address, SharedRuntime::throw_WrongMethodTypeException), |
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|
3235 false, G5_method_type, G3_method_handle); |
0 | 3236 } |
3237 | |
3238 | |
3239 void generate_all() { | |
3240 // Generates all stubs and initializes the entry points | |
3241 | |
642
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3242 // Generate partial_subtype_check first here since its code depends on |
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3243 // UseZeroBaseCompressedOops which is defined after heap initialization. |
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3244 StubRoutines::Sparc::_partial_subtype_check = generate_partial_subtype_check(); |
0 | 3245 // These entry points require SharedInfo::stack0 to be set up in non-core builds |
3246 StubRoutines::_throw_AbstractMethodError_entry = generate_throw_exception("AbstractMethodError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_AbstractMethodError), false); | |
16
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3247 StubRoutines::_throw_IncompatibleClassChangeError_entry= generate_throw_exception("IncompatibleClassChangeError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_IncompatibleClassChangeError), false); |
0 | 3248 StubRoutines::_throw_ArithmeticException_entry = generate_throw_exception("ArithmeticException throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_ArithmeticException), true); |
3249 StubRoutines::_throw_NullPointerException_entry = generate_throw_exception("NullPointerException throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException), true); | |
3250 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); | |
3251 StubRoutines::_throw_StackOverflowError_entry = generate_throw_exception("StackOverflowError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_StackOverflowError), false); | |
3252 | |
3253 StubRoutines::_handler_for_unsafe_access_entry = | |
3254 generate_handler_for_unsafe_access(); | |
3255 | |
3256 // support for verify_oop (must happen after universe_init) | |
3257 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop_subroutine(); | |
3258 | |
3259 // arraycopy stubs used by compilers | |
3260 generate_arraycopy_stubs(); | |
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3261 |
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3262 // Don't initialize the platform math functions since sparc |
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|
3263 // doesn't have intrinsics for these operations. |
0 | 3264 } |
3265 | |
3266 | |
3267 public: | |
3268 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) { | |
3269 // replace the standard masm with a special one: | |
3270 _masm = new MacroAssembler(code); | |
3271 | |
3272 _stub_count = !all ? 0x100 : 0x200; | |
3273 if (all) { | |
3274 generate_all(); | |
3275 } else { | |
3276 generate_initial(); | |
3277 } | |
3278 | |
3279 // make sure this stub is available for all local calls | |
3280 if (_atomic_add_stub.is_unbound()) { | |
3281 // generate a second time, if necessary | |
3282 (void) generate_atomic_add(); | |
3283 } | |
3284 } | |
3285 | |
3286 | |
3287 private: | |
3288 int _stub_count; | |
3289 void stub_prolog(StubCodeDesc* cdesc) { | |
3290 # ifdef ASSERT | |
3291 // put extra information in the stub code, to make it more readable | |
3292 #ifdef _LP64 | |
3293 // Write the high part of the address | |
3294 // [RGV] Check if there is a dependency on the size of this prolog | |
3295 __ emit_data((intptr_t)cdesc >> 32, relocInfo::none); | |
3296 #endif | |
3297 __ emit_data((intptr_t)cdesc, relocInfo::none); | |
3298 __ emit_data(++_stub_count, relocInfo::none); | |
3299 # endif | |
3300 align(true); | |
3301 } | |
3302 | |
3303 void align(bool at_header = false) { | |
3304 // %%%%% move this constant somewhere else | |
3305 // UltraSPARC cache line size is 8 instructions: | |
3306 const unsigned int icache_line_size = 32; | |
3307 const unsigned int icache_half_line_size = 16; | |
3308 | |
3309 if (at_header) { | |
3310 while ((intptr_t)(__ pc()) % icache_line_size != 0) { | |
3311 __ emit_data(0, relocInfo::none); | |
3312 } | |
3313 } else { | |
3314 while ((intptr_t)(__ pc()) % icache_half_line_size != 0) { | |
3315 __ nop(); | |
3316 } | |
3317 } | |
3318 } | |
3319 | |
3320 }; // end class declaration | |
3321 | |
3322 void StubGenerator_generate(CodeBuffer* code, bool all) { | |
3323 StubGenerator g(code, all); | |
3324 } |