Mercurial > hg > truffle
annotate src/cpu/x86/vm/stubGenerator_x86_32.cpp @ 5289:6519cf82d390
remove on more vmExits instance
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Tue, 24 Apr 2012 18:13:14 +0200 |
parents | 1c7c5be93e84 |
children | 957c266d8bc5 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 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_x86.inline.hpp" | |
28 #include "interpreter/interpreter.hpp" | |
29 #include "nativeInst_x86.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 TARGET_OS_FAMILY_windows | |
48 # include "thread_windows.inline.hpp" | |
49 #endif | |
3960 | 50 #ifdef TARGET_OS_FAMILY_bsd |
51 # include "thread_bsd.inline.hpp" | |
52 #endif | |
1972 | 53 #ifdef COMPILER2 |
54 #include "opto/runtime.hpp" | |
55 #endif | |
0 | 56 |
57 // Declaration and definition of StubGenerator (no .hpp file). | |
58 // For a more detailed description of the stub routine structure | |
59 // see the comment in stubRoutines.hpp | |
60 | |
61 #define __ _masm-> | |
304 | 62 #define a__ ((Assembler*)_masm)-> |
0 | 63 |
64 #ifdef PRODUCT | |
65 #define BLOCK_COMMENT(str) /* nothing */ | |
66 #else | |
67 #define BLOCK_COMMENT(str) __ block_comment(str) | |
68 #endif | |
69 | |
70 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") | |
71 | |
72 const int MXCSR_MASK = 0xFFC0; // Mask out any pending exceptions | |
73 const int FPU_CNTRL_WRD_MASK = 0xFFFF; | |
74 | |
75 // ------------------------------------------------------------------------------------------------------------------------- | |
76 // Stub Code definitions | |
77 | |
78 static address handle_unsafe_access() { | |
79 JavaThread* thread = JavaThread::current(); | |
80 address pc = thread->saved_exception_pc(); | |
81 // pc is the instruction which we must emulate | |
82 // doing a no-op is fine: return garbage from the load | |
83 // therefore, compute npc | |
84 address npc = Assembler::locate_next_instruction(pc); | |
85 | |
86 // request an async exception | |
87 thread->set_pending_unsafe_access_error(); | |
88 | |
89 // return address of next instruction to execute | |
90 return npc; | |
91 } | |
92 | |
93 class StubGenerator: public StubCodeGenerator { | |
94 private: | |
95 | |
96 #ifdef PRODUCT | |
97 #define inc_counter_np(counter) (0) | |
98 #else | |
99 void inc_counter_np_(int& counter) { | |
304 | 100 __ incrementl(ExternalAddress((address)&counter)); |
0 | 101 } |
102 #define inc_counter_np(counter) \ | |
103 BLOCK_COMMENT("inc_counter " #counter); \ | |
104 inc_counter_np_(counter); | |
105 #endif //PRODUCT | |
106 | |
107 void inc_copy_counter_np(BasicType t) { | |
108 #ifndef PRODUCT | |
109 switch (t) { | |
110 case T_BYTE: inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr); return; | |
111 case T_SHORT: inc_counter_np(SharedRuntime::_jshort_array_copy_ctr); return; | |
112 case T_INT: inc_counter_np(SharedRuntime::_jint_array_copy_ctr); return; | |
113 case T_LONG: inc_counter_np(SharedRuntime::_jlong_array_copy_ctr); return; | |
114 case T_OBJECT: inc_counter_np(SharedRuntime::_oop_array_copy_ctr); return; | |
115 } | |
116 ShouldNotReachHere(); | |
117 #endif //PRODUCT | |
118 } | |
119 | |
120 //------------------------------------------------------------------------------------------------------------------------ | |
121 // Call stubs are used to call Java from C | |
122 // | |
123 // [ return_from_Java ] <--- rsp | |
124 // [ argument word n ] | |
125 // ... | |
126 // -N [ argument word 1 ] | |
127 // -7 [ Possible padding for stack alignment ] | |
128 // -6 [ Possible padding for stack alignment ] | |
129 // -5 [ Possible padding for stack alignment ] | |
130 // -4 [ mxcsr save ] <--- rsp_after_call | |
131 // -3 [ saved rbx, ] | |
132 // -2 [ saved rsi ] | |
133 // -1 [ saved rdi ] | |
134 // 0 [ saved rbp, ] <--- rbp, | |
135 // 1 [ return address ] | |
136 // 2 [ ptr. to call wrapper ] | |
137 // 3 [ result ] | |
138 // 4 [ result_type ] | |
139 // 5 [ method ] | |
140 // 6 [ entry_point ] | |
141 // 7 [ parameters ] | |
142 // 8 [ parameter_size ] | |
143 // 9 [ thread ] | |
144 | |
145 | |
146 address generate_call_stub(address& return_address) { | |
147 StubCodeMark mark(this, "StubRoutines", "call_stub"); | |
148 address start = __ pc(); | |
149 | |
150 // stub code parameters / addresses | |
151 assert(frame::entry_frame_call_wrapper_offset == 2, "adjust this code"); | |
152 bool sse_save = false; | |
153 const Address rsp_after_call(rbp, -4 * wordSize); // same as in generate_catch_exception()! | |
154 const int locals_count_in_bytes (4*wordSize); | |
155 const Address mxcsr_save (rbp, -4 * wordSize); | |
156 const Address saved_rbx (rbp, -3 * wordSize); | |
157 const Address saved_rsi (rbp, -2 * wordSize); | |
158 const Address saved_rdi (rbp, -1 * wordSize); | |
159 const Address result (rbp, 3 * wordSize); | |
160 const Address result_type (rbp, 4 * wordSize); | |
161 const Address method (rbp, 5 * wordSize); | |
162 const Address entry_point (rbp, 6 * wordSize); | |
163 const Address parameters (rbp, 7 * wordSize); | |
164 const Address parameter_size(rbp, 8 * wordSize); | |
165 const Address thread (rbp, 9 * wordSize); // same as in generate_catch_exception()! | |
166 sse_save = UseSSE > 0; | |
167 | |
168 // stub code | |
169 __ enter(); | |
304 | 170 __ movptr(rcx, parameter_size); // parameter counter |
1506 | 171 __ shlptr(rcx, Interpreter::logStackElementSize); // convert parameter count to bytes |
304 | 172 __ addptr(rcx, locals_count_in_bytes); // reserve space for register saves |
173 __ subptr(rsp, rcx); | |
174 __ andptr(rsp, -(StackAlignmentInBytes)); // Align stack | |
0 | 175 |
176 // save rdi, rsi, & rbx, according to C calling conventions | |
304 | 177 __ movptr(saved_rdi, rdi); |
178 __ movptr(saved_rsi, rsi); | |
179 __ movptr(saved_rbx, rbx); | |
0 | 180 // save and initialize %mxcsr |
181 if (sse_save) { | |
182 Label skip_ldmx; | |
183 __ stmxcsr(mxcsr_save); | |
184 __ movl(rax, mxcsr_save); | |
185 __ andl(rax, MXCSR_MASK); // Only check control and mask bits | |
186 ExternalAddress mxcsr_std(StubRoutines::addr_mxcsr_std()); | |
187 __ cmp32(rax, mxcsr_std); | |
188 __ jcc(Assembler::equal, skip_ldmx); | |
189 __ ldmxcsr(mxcsr_std); | |
190 __ bind(skip_ldmx); | |
191 } | |
192 | |
193 // make sure the control word is correct. | |
194 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); | |
195 | |
196 #ifdef ASSERT | |
197 // make sure we have no pending exceptions | |
198 { Label L; | |
304 | 199 __ movptr(rcx, thread); |
200 __ cmpptr(Address(rcx, Thread::pending_exception_offset()), (int32_t)NULL_WORD); | |
0 | 201 __ jcc(Assembler::equal, L); |
202 __ stop("StubRoutines::call_stub: entered with pending exception"); | |
203 __ bind(L); | |
204 } | |
205 #endif | |
206 | |
207 // pass parameters if any | |
208 BLOCK_COMMENT("pass parameters if any"); | |
209 Label parameters_done; | |
210 __ movl(rcx, parameter_size); // parameter counter | |
211 __ testl(rcx, rcx); | |
212 __ jcc(Assembler::zero, parameters_done); | |
213 | |
214 // parameter passing loop | |
215 | |
216 Label loop; | |
217 // Copy Java parameters in reverse order (receiver last) | |
218 // Note that the argument order is inverted in the process | |
219 // source is rdx[rcx: N-1..0] | |
220 // dest is rsp[rbx: 0..N-1] | |
221 | |
304 | 222 __ movptr(rdx, parameters); // parameter pointer |
223 __ xorptr(rbx, rbx); | |
0 | 224 |
225 __ BIND(loop); | |
226 | |
227 // get parameter | |
304 | 228 __ movptr(rax, Address(rdx, rcx, Interpreter::stackElementScale(), -wordSize)); |
229 __ movptr(Address(rsp, rbx, Interpreter::stackElementScale(), | |
0 | 230 Interpreter::expr_offset_in_bytes(0)), rax); // store parameter |
231 __ increment(rbx); | |
232 __ decrement(rcx); | |
233 __ jcc(Assembler::notZero, loop); | |
234 | |
235 // call Java function | |
236 __ BIND(parameters_done); | |
304 | 237 __ movptr(rbx, method); // get methodOop |
238 __ movptr(rax, entry_point); // get entry_point | |
239 __ mov(rsi, rsp); // set sender sp | |
0 | 240 BLOCK_COMMENT("call Java function"); |
241 __ call(rax); | |
242 | |
243 BLOCK_COMMENT("call_stub_return_address:"); | |
244 return_address = __ pc(); | |
245 | |
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246 #ifdef COMPILER2 |
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247 { |
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248 Label L_skip; |
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249 if (UseSSE >= 2) { |
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250 __ verify_FPU(0, "call_stub_return"); |
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251 } else { |
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252 for (int i = 1; i < 8; i++) { |
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253 __ ffree(i); |
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254 } |
0 | 255 |
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256 // UseSSE <= 1 so double result should be left on TOS |
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257 __ movl(rsi, result_type); |
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258 __ cmpl(rsi, T_DOUBLE); |
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259 __ jcc(Assembler::equal, L_skip); |
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260 if (UseSSE == 0) { |
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261 // UseSSE == 0 so float result should be left on TOS |
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262 __ cmpl(rsi, T_FLOAT); |
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263 __ jcc(Assembler::equal, L_skip); |
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264 } |
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265 __ ffree(0); |
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266 } |
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267 __ BIND(L_skip); |
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268 } |
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269 #endif // COMPILER2 |
0 | 270 |
271 // store result depending on type | |
272 // (everything that is not T_LONG, T_FLOAT or T_DOUBLE is treated as T_INT) | |
304 | 273 __ movptr(rdi, result); |
0 | 274 Label is_long, is_float, is_double, exit; |
275 __ movl(rsi, result_type); | |
276 __ cmpl(rsi, T_LONG); | |
277 __ jcc(Assembler::equal, is_long); | |
278 __ cmpl(rsi, T_FLOAT); | |
279 __ jcc(Assembler::equal, is_float); | |
280 __ cmpl(rsi, T_DOUBLE); | |
281 __ jcc(Assembler::equal, is_double); | |
282 | |
283 // handle T_INT case | |
284 __ movl(Address(rdi, 0), rax); | |
285 __ BIND(exit); | |
286 | |
287 // check that FPU stack is empty | |
288 __ verify_FPU(0, "generate_call_stub"); | |
289 | |
290 // pop parameters | |
304 | 291 __ lea(rsp, rsp_after_call); |
0 | 292 |
293 // restore %mxcsr | |
294 if (sse_save) { | |
295 __ ldmxcsr(mxcsr_save); | |
296 } | |
297 | |
298 // restore rdi, rsi and rbx, | |
304 | 299 __ movptr(rbx, saved_rbx); |
300 __ movptr(rsi, saved_rsi); | |
301 __ movptr(rdi, saved_rdi); | |
302 __ addptr(rsp, 4*wordSize); | |
0 | 303 |
304 // return | |
304 | 305 __ pop(rbp); |
0 | 306 __ ret(0); |
307 | |
308 // handle return types different from T_INT | |
309 __ BIND(is_long); | |
310 __ movl(Address(rdi, 0 * wordSize), rax); | |
311 __ movl(Address(rdi, 1 * wordSize), rdx); | |
312 __ jmp(exit); | |
313 | |
314 __ BIND(is_float); | |
315 // interpreter uses xmm0 for return values | |
316 if (UseSSE >= 1) { | |
317 __ movflt(Address(rdi, 0), xmm0); | |
318 } else { | |
319 __ fstp_s(Address(rdi, 0)); | |
320 } | |
321 __ jmp(exit); | |
322 | |
323 __ BIND(is_double); | |
324 // interpreter uses xmm0 for return values | |
325 if (UseSSE >= 2) { | |
326 __ movdbl(Address(rdi, 0), xmm0); | |
327 } else { | |
328 __ fstp_d(Address(rdi, 0)); | |
329 } | |
330 __ jmp(exit); | |
331 | |
332 return start; | |
333 } | |
334 | |
335 | |
336 //------------------------------------------------------------------------------------------------------------------------ | |
337 // Return point for a Java call if there's an exception thrown in Java code. | |
338 // The exception is caught and transformed into a pending exception stored in | |
339 // JavaThread that can be tested from within the VM. | |
340 // | |
341 // Note: Usually the parameters are removed by the callee. In case of an exception | |
342 // crossing an activation frame boundary, that is not the case if the callee | |
343 // is compiled code => need to setup the rsp. | |
344 // | |
345 // rax,: exception oop | |
346 | |
347 address generate_catch_exception() { | |
348 StubCodeMark mark(this, "StubRoutines", "catch_exception"); | |
349 const Address rsp_after_call(rbp, -4 * wordSize); // same as in generate_call_stub()! | |
350 const Address thread (rbp, 9 * wordSize); // same as in generate_call_stub()! | |
351 address start = __ pc(); | |
352 | |
353 // get thread directly | |
304 | 354 __ movptr(rcx, thread); |
0 | 355 #ifdef ASSERT |
356 // verify that threads correspond | |
357 { Label L; | |
358 __ get_thread(rbx); | |
304 | 359 __ cmpptr(rbx, rcx); |
0 | 360 __ jcc(Assembler::equal, L); |
361 __ stop("StubRoutines::catch_exception: threads must correspond"); | |
362 __ bind(L); | |
363 } | |
364 #endif | |
365 // set pending exception | |
366 __ verify_oop(rax); | |
304 | 367 __ movptr(Address(rcx, Thread::pending_exception_offset()), rax ); |
0 | 368 __ lea(Address(rcx, Thread::exception_file_offset ()), |
369 ExternalAddress((address)__FILE__)); | |
370 __ movl(Address(rcx, Thread::exception_line_offset ()), __LINE__ ); | |
371 // complete return to VM | |
372 assert(StubRoutines::_call_stub_return_address != NULL, "_call_stub_return_address must have been generated before"); | |
373 __ jump(RuntimeAddress(StubRoutines::_call_stub_return_address)); | |
374 | |
375 return start; | |
376 } | |
377 | |
378 | |
379 //------------------------------------------------------------------------------------------------------------------------ | |
380 // Continuation point for runtime calls returning with a pending exception. | |
381 // The pending exception check happened in the runtime or native call stub. | |
382 // The pending exception in Thread is converted into a Java-level exception. | |
383 // | |
384 // Contract with Java-level exception handlers: | |
1295 | 385 // rax: exception |
0 | 386 // rdx: throwing pc |
387 // | |
388 // NOTE: At entry of this stub, exception-pc must be on stack !! | |
389 | |
390 address generate_forward_exception() { | |
391 StubCodeMark mark(this, "StubRoutines", "forward exception"); | |
392 address start = __ pc(); | |
1295 | 393 const Register thread = rcx; |
394 | |
395 // other registers used in this stub | |
396 const Register exception_oop = rax; | |
397 const Register handler_addr = rbx; | |
398 const Register exception_pc = rdx; | |
0 | 399 |
400 // Upon entry, the sp points to the return address returning into Java | |
401 // (interpreted or compiled) code; i.e., the return address becomes the | |
402 // throwing pc. | |
403 // | |
404 // Arguments pushed before the runtime call are still on the stack but | |
405 // the exception handler will reset the stack pointer -> ignore them. | |
406 // A potential result in registers can be ignored as well. | |
407 | |
408 #ifdef ASSERT | |
409 // make sure this code is only executed if there is a pending exception | |
410 { Label L; | |
1295 | 411 __ get_thread(thread); |
412 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); | |
0 | 413 __ jcc(Assembler::notEqual, L); |
414 __ stop("StubRoutines::forward exception: no pending exception (1)"); | |
415 __ bind(L); | |
416 } | |
417 #endif | |
418 | |
419 // compute exception handler into rbx, | |
1295 | 420 __ get_thread(thread); |
421 __ movptr(exception_pc, Address(rsp, 0)); | |
0 | 422 BLOCK_COMMENT("call exception_handler_for_return_address"); |
1295 | 423 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), thread, exception_pc); |
424 __ mov(handler_addr, rax); | |
0 | 425 |
1295 | 426 // setup rax & rdx, remove return address & clear pending exception |
427 __ get_thread(thread); | |
428 __ pop(exception_pc); | |
429 __ movptr(exception_oop, Address(thread, Thread::pending_exception_offset())); | |
430 __ movptr(Address(thread, Thread::pending_exception_offset()), NULL_WORD); | |
0 | 431 |
432 #ifdef ASSERT | |
433 // make sure exception is set | |
434 { Label L; | |
1295 | 435 __ testptr(exception_oop, exception_oop); |
0 | 436 __ jcc(Assembler::notEqual, L); |
437 __ stop("StubRoutines::forward exception: no pending exception (2)"); | |
438 __ bind(L); | |
439 } | |
440 #endif | |
441 | |
1295 | 442 // Verify that there is really a valid exception in RAX. |
443 __ verify_oop(exception_oop); | |
444 | |
0 | 445 // continue at exception handler (return address removed) |
1295 | 446 // rax: exception |
447 // rbx: exception handler | |
0 | 448 // rdx: throwing pc |
1295 | 449 __ jmp(handler_addr); |
0 | 450 |
451 return start; | |
452 } | |
453 | |
454 | |
455 //---------------------------------------------------------------------------------------------------- | |
456 // Support for jint Atomic::xchg(jint exchange_value, volatile jint* dest) | |
457 // | |
458 // xchg exists as far back as 8086, lock needed for MP only | |
459 // Stack layout immediately after call: | |
460 // | |
461 // 0 [ret addr ] <--- rsp | |
462 // 1 [ ex ] | |
463 // 2 [ dest ] | |
464 // | |
465 // Result: *dest <- ex, return (old *dest) | |
466 // | |
467 // Note: win32 does not currently use this code | |
468 | |
469 address generate_atomic_xchg() { | |
470 StubCodeMark mark(this, "StubRoutines", "atomic_xchg"); | |
471 address start = __ pc(); | |
472 | |
304 | 473 __ push(rdx); |
0 | 474 Address exchange(rsp, 2 * wordSize); |
475 Address dest_addr(rsp, 3 * wordSize); | |
476 __ movl(rax, exchange); | |
304 | 477 __ movptr(rdx, dest_addr); |
478 __ xchgl(rax, Address(rdx, 0)); | |
479 __ pop(rdx); | |
0 | 480 __ ret(0); |
481 | |
482 return start; | |
483 } | |
484 | |
485 //---------------------------------------------------------------------------------------------------- | |
486 // Support for void verify_mxcsr() | |
487 // | |
488 // This routine is used with -Xcheck:jni to verify that native | |
489 // JNI code does not return to Java code without restoring the | |
490 // MXCSR register to our expected state. | |
491 | |
492 | |
493 address generate_verify_mxcsr() { | |
494 StubCodeMark mark(this, "StubRoutines", "verify_mxcsr"); | |
495 address start = __ pc(); | |
496 | |
497 const Address mxcsr_save(rsp, 0); | |
498 | |
499 if (CheckJNICalls && UseSSE > 0 ) { | |
500 Label ok_ret; | |
501 ExternalAddress mxcsr_std(StubRoutines::addr_mxcsr_std()); | |
304 | 502 __ push(rax); |
503 __ subptr(rsp, wordSize); // allocate a temp location | |
0 | 504 __ stmxcsr(mxcsr_save); |
505 __ movl(rax, mxcsr_save); | |
506 __ andl(rax, MXCSR_MASK); | |
507 __ cmp32(rax, mxcsr_std); | |
508 __ jcc(Assembler::equal, ok_ret); | |
509 | |
510 __ warn("MXCSR changed by native JNI code."); | |
511 | |
512 __ ldmxcsr(mxcsr_std); | |
513 | |
514 __ bind(ok_ret); | |
304 | 515 __ addptr(rsp, wordSize); |
516 __ pop(rax); | |
0 | 517 } |
518 | |
519 __ ret(0); | |
520 | |
521 return start; | |
522 } | |
523 | |
524 | |
525 //--------------------------------------------------------------------------- | |
526 // Support for void verify_fpu_cntrl_wrd() | |
527 // | |
528 // This routine is used with -Xcheck:jni to verify that native | |
529 // JNI code does not return to Java code without restoring the | |
530 // FP control word to our expected state. | |
531 | |
532 address generate_verify_fpu_cntrl_wrd() { | |
533 StubCodeMark mark(this, "StubRoutines", "verify_spcw"); | |
534 address start = __ pc(); | |
535 | |
536 const Address fpu_cntrl_wrd_save(rsp, 0); | |
537 | |
538 if (CheckJNICalls) { | |
539 Label ok_ret; | |
304 | 540 __ push(rax); |
541 __ subptr(rsp, wordSize); // allocate a temp location | |
0 | 542 __ fnstcw(fpu_cntrl_wrd_save); |
543 __ movl(rax, fpu_cntrl_wrd_save); | |
544 __ andl(rax, FPU_CNTRL_WRD_MASK); | |
545 ExternalAddress fpu_std(StubRoutines::addr_fpu_cntrl_wrd_std()); | |
546 __ cmp32(rax, fpu_std); | |
547 __ jcc(Assembler::equal, ok_ret); | |
548 | |
549 __ warn("Floating point control word changed by native JNI code."); | |
550 | |
551 __ fldcw(fpu_std); | |
552 | |
553 __ bind(ok_ret); | |
304 | 554 __ addptr(rsp, wordSize); |
555 __ pop(rax); | |
0 | 556 } |
557 | |
558 __ ret(0); | |
559 | |
560 return start; | |
561 } | |
562 | |
563 //--------------------------------------------------------------------------- | |
564 // Wrapper for slow-case handling of double-to-integer conversion | |
565 // d2i or f2i fast case failed either because it is nan or because | |
566 // of under/overflow. | |
567 // Input: FPU TOS: float value | |
568 // Output: rax, (rdx): integer (long) result | |
569 | |
570 address generate_d2i_wrapper(BasicType t, address fcn) { | |
571 StubCodeMark mark(this, "StubRoutines", "d2i_wrapper"); | |
572 address start = __ pc(); | |
573 | |
574 // Capture info about frame layout | |
575 enum layout { FPUState_off = 0, | |
576 rbp_off = FPUStateSizeInWords, | |
577 rdi_off, | |
578 rsi_off, | |
579 rcx_off, | |
580 rbx_off, | |
581 saved_argument_off, | |
582 saved_argument_off2, // 2nd half of double | |
583 framesize | |
584 }; | |
585 | |
586 assert(FPUStateSizeInWords == 27, "update stack layout"); | |
587 | |
588 // Save outgoing argument to stack across push_FPU_state() | |
304 | 589 __ subptr(rsp, wordSize * 2); |
0 | 590 __ fstp_d(Address(rsp, 0)); |
591 | |
592 // Save CPU & FPU state | |
304 | 593 __ push(rbx); |
594 __ push(rcx); | |
595 __ push(rsi); | |
596 __ push(rdi); | |
597 __ push(rbp); | |
0 | 598 __ push_FPU_state(); |
599 | |
600 // push_FPU_state() resets the FP top of stack | |
601 // Load original double into FP top of stack | |
602 __ fld_d(Address(rsp, saved_argument_off * wordSize)); | |
603 // Store double into stack as outgoing argument | |
304 | 604 __ subptr(rsp, wordSize*2); |
0 | 605 __ fst_d(Address(rsp, 0)); |
606 | |
607 // Prepare FPU for doing math in C-land | |
608 __ empty_FPU_stack(); | |
609 // Call the C code to massage the double. Result in EAX | |
610 if (t == T_INT) | |
611 { BLOCK_COMMENT("SharedRuntime::d2i"); } | |
612 else if (t == T_LONG) | |
613 { BLOCK_COMMENT("SharedRuntime::d2l"); } | |
614 __ call_VM_leaf( fcn, 2 ); | |
615 | |
616 // Restore CPU & FPU state | |
617 __ pop_FPU_state(); | |
304 | 618 __ pop(rbp); |
619 __ pop(rdi); | |
620 __ pop(rsi); | |
621 __ pop(rcx); | |
622 __ pop(rbx); | |
623 __ addptr(rsp, wordSize * 2); | |
0 | 624 |
625 __ ret(0); | |
626 | |
627 return start; | |
628 } | |
629 | |
630 | |
631 //--------------------------------------------------------------------------- | |
632 // The following routine generates a subroutine to throw an asynchronous | |
633 // UnknownError when an unsafe access gets a fault that could not be | |
634 // reasonably prevented by the programmer. (Example: SIGBUS/OBJERR.) | |
635 address generate_handler_for_unsafe_access() { | |
636 StubCodeMark mark(this, "StubRoutines", "handler_for_unsafe_access"); | |
637 address start = __ pc(); | |
638 | |
304 | 639 __ push(0); // hole for return address-to-be |
640 __ pusha(); // push registers | |
0 | 641 Address next_pc(rsp, RegisterImpl::number_of_registers * BytesPerWord); |
642 BLOCK_COMMENT("call handle_unsafe_access"); | |
643 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, handle_unsafe_access))); | |
304 | 644 __ movptr(next_pc, rax); // stuff next address |
645 __ popa(); | |
0 | 646 __ ret(0); // jump to next address |
647 | |
648 return start; | |
649 } | |
650 | |
651 | |
652 //---------------------------------------------------------------------------------------------------- | |
653 // Non-destructive plausibility checks for oops | |
654 | |
655 address generate_verify_oop() { | |
656 StubCodeMark mark(this, "StubRoutines", "verify_oop"); | |
657 address start = __ pc(); | |
658 | |
659 // Incoming arguments on stack after saving rax,: | |
660 // | |
661 // [tos ]: saved rdx | |
662 // [tos + 1]: saved EFLAGS | |
663 // [tos + 2]: return address | |
664 // [tos + 3]: char* error message | |
665 // [tos + 4]: oop object to verify | |
666 // [tos + 5]: saved rax, - saved by caller and bashed | |
667 | |
668 Label exit, error; | |
304 | 669 __ pushf(); |
670 __ incrementl(ExternalAddress((address) StubRoutines::verify_oop_count_addr())); | |
671 __ push(rdx); // save rdx | |
0 | 672 // make sure object is 'reasonable' |
304 | 673 __ movptr(rax, Address(rsp, 4 * wordSize)); // get object |
674 __ testptr(rax, rax); | |
0 | 675 __ jcc(Assembler::zero, exit); // if obj is NULL it is ok |
676 | |
677 // Check if the oop is in the right area of memory | |
678 const int oop_mask = Universe::verify_oop_mask(); | |
679 const int oop_bits = Universe::verify_oop_bits(); | |
304 | 680 __ mov(rdx, rax); |
681 __ andptr(rdx, oop_mask); | |
682 __ cmpptr(rdx, oop_bits); | |
0 | 683 __ jcc(Assembler::notZero, error); |
684 | |
685 // make sure klass is 'reasonable' | |
304 | 686 __ movptr(rax, Address(rax, oopDesc::klass_offset_in_bytes())); // get klass |
687 __ testptr(rax, rax); | |
0 | 688 __ jcc(Assembler::zero, error); // if klass is NULL it is broken |
689 | |
690 // Check if the klass is in the right area of memory | |
691 const int klass_mask = Universe::verify_klass_mask(); | |
692 const int klass_bits = Universe::verify_klass_bits(); | |
304 | 693 __ mov(rdx, rax); |
694 __ andptr(rdx, klass_mask); | |
695 __ cmpptr(rdx, klass_bits); | |
0 | 696 __ jcc(Assembler::notZero, error); |
697 | |
698 // make sure klass' klass is 'reasonable' | |
304 | 699 __ movptr(rax, Address(rax, oopDesc::klass_offset_in_bytes())); // get klass' klass |
700 __ testptr(rax, rax); | |
0 | 701 __ jcc(Assembler::zero, error); // if klass' klass is NULL it is broken |
702 | |
304 | 703 __ mov(rdx, rax); |
704 __ andptr(rdx, klass_mask); | |
705 __ cmpptr(rdx, klass_bits); | |
0 | 706 __ jcc(Assembler::notZero, error); // if klass not in right area |
707 // of memory it is broken too. | |
708 | |
709 // return if everything seems ok | |
710 __ bind(exit); | |
304 | 711 __ movptr(rax, Address(rsp, 5 * wordSize)); // get saved rax, back |
712 __ pop(rdx); // restore rdx | |
713 __ popf(); // restore EFLAGS | |
0 | 714 __ ret(3 * wordSize); // pop arguments |
715 | |
716 // handle errors | |
717 __ bind(error); | |
304 | 718 __ movptr(rax, Address(rsp, 5 * wordSize)); // get saved rax, back |
719 __ pop(rdx); // get saved rdx back | |
720 __ popf(); // get saved EFLAGS off stack -- will be ignored | |
721 __ pusha(); // push registers (eip = return address & msg are already pushed) | |
0 | 722 BLOCK_COMMENT("call MacroAssembler::debug"); |
304 | 723 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug32))); |
724 __ popa(); | |
0 | 725 __ ret(3 * wordSize); // pop arguments |
726 return start; | |
727 } | |
728 | |
729 // | |
730 // Generate pre-barrier for array stores | |
731 // | |
732 // Input: | |
733 // start - starting address | |
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734 // count - element count |
2324 | 735 void gen_write_ref_array_pre_barrier(Register start, Register count, bool uninitialized_target) { |
0 | 736 assert_different_registers(start, count); |
737 BarrierSet* bs = Universe::heap()->barrier_set(); | |
738 switch (bs->kind()) { | |
739 case BarrierSet::G1SATBCT: | |
740 case BarrierSet::G1SATBCTLogging: | |
2324 | 741 // With G1, don't generate the call if we statically know that the target in uninitialized |
742 if (!uninitialized_target) { | |
743 __ pusha(); // push registers | |
744 __ call_VM_leaf(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_pre), | |
745 start, count); | |
746 __ popa(); | |
747 } | |
0 | 748 break; |
749 case BarrierSet::CardTableModRef: | |
750 case BarrierSet::CardTableExtension: | |
751 case BarrierSet::ModRef: | |
752 break; | |
753 default : | |
754 ShouldNotReachHere(); | |
755 | |
756 } | |
757 } | |
758 | |
759 | |
760 // | |
761 // Generate a post-barrier for an array store | |
762 // | |
763 // start - starting address | |
764 // count - element count | |
765 // | |
766 // The two input registers are overwritten. | |
767 // | |
768 void gen_write_ref_array_post_barrier(Register start, Register count) { | |
769 BarrierSet* bs = Universe::heap()->barrier_set(); | |
770 assert_different_registers(start, count); | |
771 switch (bs->kind()) { | |
772 case BarrierSet::G1SATBCT: | |
773 case BarrierSet::G1SATBCTLogging: | |
774 { | |
304 | 775 __ pusha(); // push registers |
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776 __ call_VM_leaf(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_post), |
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777 start, count); |
304 | 778 __ popa(); |
0 | 779 } |
780 break; | |
781 | |
782 case BarrierSet::CardTableModRef: | |
783 case BarrierSet::CardTableExtension: | |
784 { | |
785 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | |
786 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); | |
787 | |
788 Label L_loop; | |
789 const Register end = count; // elements count; end == start+count-1 | |
790 assert_different_registers(start, end); | |
791 | |
304 | 792 __ lea(end, Address(start, count, Address::times_ptr, -wordSize)); |
793 __ shrptr(start, CardTableModRefBS::card_shift); | |
794 __ shrptr(end, CardTableModRefBS::card_shift); | |
795 __ subptr(end, start); // end --> count | |
0 | 796 __ BIND(L_loop); |
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797 intptr_t disp = (intptr_t) ct->byte_map_base; |
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798 Address cardtable(start, count, Address::times_1, disp); |
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799 __ movb(cardtable, 0); |
0 | 800 __ decrement(count); |
801 __ jcc(Assembler::greaterEqual, L_loop); | |
802 } | |
803 break; | |
804 case BarrierSet::ModRef: | |
805 break; | |
806 default : | |
807 ShouldNotReachHere(); | |
808 | |
809 } | |
810 } | |
811 | |
405 | 812 |
813 // Copy 64 bytes chunks | |
814 // | |
815 // Inputs: | |
816 // from - source array address | |
817 // to_from - destination array address - from | |
818 // qword_count - 8-bytes element count, negative | |
819 // | |
820 void xmm_copy_forward(Register from, Register to_from, Register qword_count) { | |
821 assert( UseSSE >= 2, "supported cpu only" ); | |
822 Label L_copy_64_bytes_loop, L_copy_64_bytes, L_copy_8_bytes, L_exit; | |
823 // Copy 64-byte chunks | |
824 __ jmpb(L_copy_64_bytes); | |
1365 | 825 __ align(OptoLoopAlignment); |
405 | 826 __ BIND(L_copy_64_bytes_loop); |
827 | |
828 if(UseUnalignedLoadStores) { | |
829 __ movdqu(xmm0, Address(from, 0)); | |
830 __ movdqu(Address(from, to_from, Address::times_1, 0), xmm0); | |
831 __ movdqu(xmm1, Address(from, 16)); | |
832 __ movdqu(Address(from, to_from, Address::times_1, 16), xmm1); | |
833 __ movdqu(xmm2, Address(from, 32)); | |
834 __ movdqu(Address(from, to_from, Address::times_1, 32), xmm2); | |
835 __ movdqu(xmm3, Address(from, 48)); | |
836 __ movdqu(Address(from, to_from, Address::times_1, 48), xmm3); | |
837 | |
838 } else { | |
839 __ movq(xmm0, Address(from, 0)); | |
840 __ movq(Address(from, to_from, Address::times_1, 0), xmm0); | |
841 __ movq(xmm1, Address(from, 8)); | |
842 __ movq(Address(from, to_from, Address::times_1, 8), xmm1); | |
843 __ movq(xmm2, Address(from, 16)); | |
844 __ movq(Address(from, to_from, Address::times_1, 16), xmm2); | |
845 __ movq(xmm3, Address(from, 24)); | |
846 __ movq(Address(from, to_from, Address::times_1, 24), xmm3); | |
847 __ movq(xmm4, Address(from, 32)); | |
848 __ movq(Address(from, to_from, Address::times_1, 32), xmm4); | |
849 __ movq(xmm5, Address(from, 40)); | |
850 __ movq(Address(from, to_from, Address::times_1, 40), xmm5); | |
851 __ movq(xmm6, Address(from, 48)); | |
852 __ movq(Address(from, to_from, Address::times_1, 48), xmm6); | |
853 __ movq(xmm7, Address(from, 56)); | |
854 __ movq(Address(from, to_from, Address::times_1, 56), xmm7); | |
855 } | |
856 | |
857 __ addl(from, 64); | |
858 __ BIND(L_copy_64_bytes); | |
859 __ subl(qword_count, 8); | |
860 __ jcc(Assembler::greaterEqual, L_copy_64_bytes_loop); | |
861 __ addl(qword_count, 8); | |
862 __ jccb(Assembler::zero, L_exit); | |
863 // | |
864 // length is too short, just copy qwords | |
865 // | |
866 __ BIND(L_copy_8_bytes); | |
867 __ movq(xmm0, Address(from, 0)); | |
868 __ movq(Address(from, to_from, Address::times_1), xmm0); | |
869 __ addl(from, 8); | |
870 __ decrement(qword_count); | |
871 __ jcc(Assembler::greater, L_copy_8_bytes); | |
872 __ BIND(L_exit); | |
873 } | |
874 | |
0 | 875 // Copy 64 bytes chunks |
876 // | |
877 // Inputs: | |
878 // from - source array address | |
879 // to_from - destination array address - from | |
880 // qword_count - 8-bytes element count, negative | |
881 // | |
882 void mmx_copy_forward(Register from, Register to_from, Register qword_count) { | |
405 | 883 assert( VM_Version::supports_mmx(), "supported cpu only" ); |
0 | 884 Label L_copy_64_bytes_loop, L_copy_64_bytes, L_copy_8_bytes, L_exit; |
885 // Copy 64-byte chunks | |
886 __ jmpb(L_copy_64_bytes); | |
1365 | 887 __ align(OptoLoopAlignment); |
0 | 888 __ BIND(L_copy_64_bytes_loop); |
889 __ movq(mmx0, Address(from, 0)); | |
890 __ movq(mmx1, Address(from, 8)); | |
891 __ movq(mmx2, Address(from, 16)); | |
892 __ movq(Address(from, to_from, Address::times_1, 0), mmx0); | |
893 __ movq(mmx3, Address(from, 24)); | |
894 __ movq(Address(from, to_from, Address::times_1, 8), mmx1); | |
895 __ movq(mmx4, Address(from, 32)); | |
896 __ movq(Address(from, to_from, Address::times_1, 16), mmx2); | |
897 __ movq(mmx5, Address(from, 40)); | |
898 __ movq(Address(from, to_from, Address::times_1, 24), mmx3); | |
899 __ movq(mmx6, Address(from, 48)); | |
900 __ movq(Address(from, to_from, Address::times_1, 32), mmx4); | |
901 __ movq(mmx7, Address(from, 56)); | |
902 __ movq(Address(from, to_from, Address::times_1, 40), mmx5); | |
903 __ movq(Address(from, to_from, Address::times_1, 48), mmx6); | |
904 __ movq(Address(from, to_from, Address::times_1, 56), mmx7); | |
304 | 905 __ addptr(from, 64); |
0 | 906 __ BIND(L_copy_64_bytes); |
907 __ subl(qword_count, 8); | |
908 __ jcc(Assembler::greaterEqual, L_copy_64_bytes_loop); | |
909 __ addl(qword_count, 8); | |
910 __ jccb(Assembler::zero, L_exit); | |
911 // | |
912 // length is too short, just copy qwords | |
913 // | |
914 __ BIND(L_copy_8_bytes); | |
915 __ movq(mmx0, Address(from, 0)); | |
916 __ movq(Address(from, to_from, Address::times_1), mmx0); | |
304 | 917 __ addptr(from, 8); |
0 | 918 __ decrement(qword_count); |
919 __ jcc(Assembler::greater, L_copy_8_bytes); | |
920 __ BIND(L_exit); | |
921 __ emms(); | |
922 } | |
923 | |
924 address generate_disjoint_copy(BasicType t, bool aligned, | |
925 Address::ScaleFactor sf, | |
2324 | 926 address* entry, const char *name, |
927 bool dest_uninitialized = false) { | |
0 | 928 __ align(CodeEntryAlignment); |
929 StubCodeMark mark(this, "StubRoutines", name); | |
930 address start = __ pc(); | |
931 | |
932 Label L_0_count, L_exit, L_skip_align1, L_skip_align2, L_copy_byte; | |
933 Label L_copy_2_bytes, L_copy_4_bytes, L_copy_64_bytes; | |
934 | |
304 | 935 int shift = Address::times_ptr - sf; |
0 | 936 |
937 const Register from = rsi; // source array address | |
938 const Register to = rdi; // destination array address | |
939 const Register count = rcx; // elements count | |
940 const Register to_from = to; // (to - from) | |
941 const Register saved_to = rdx; // saved destination array address | |
942 | |
943 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 944 __ push(rsi); |
945 __ push(rdi); | |
946 __ movptr(from , Address(rsp, 12+ 4)); | |
947 __ movptr(to , Address(rsp, 12+ 8)); | |
0 | 948 __ movl(count, Address(rsp, 12+ 12)); |
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949 |
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950 if (entry != NULL) { |
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951 *entry = __ pc(); // Entry point from conjoint arraycopy stub. |
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952 BLOCK_COMMENT("Entry:"); |
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953 } |
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954 |
0 | 955 if (t == T_OBJECT) { |
956 __ testl(count, count); | |
957 __ jcc(Assembler::zero, L_0_count); | |
2324 | 958 gen_write_ref_array_pre_barrier(to, count, dest_uninitialized); |
304 | 959 __ mov(saved_to, to); // save 'to' |
0 | 960 } |
961 | |
304 | 962 __ subptr(to, from); // to --> to_from |
0 | 963 __ cmpl(count, 2<<shift); // Short arrays (< 8 bytes) copy by element |
964 __ jcc(Assembler::below, L_copy_4_bytes); // use unsigned cmp | |
405 | 965 if (!UseUnalignedLoadStores && !aligned && (t == T_BYTE || t == T_SHORT)) { |
0 | 966 // align source address at 4 bytes address boundary |
967 if (t == T_BYTE) { | |
968 // One byte misalignment happens only for byte arrays | |
969 __ testl(from, 1); | |
970 __ jccb(Assembler::zero, L_skip_align1); | |
971 __ movb(rax, Address(from, 0)); | |
972 __ movb(Address(from, to_from, Address::times_1, 0), rax); | |
973 __ increment(from); | |
974 __ decrement(count); | |
975 __ BIND(L_skip_align1); | |
976 } | |
977 // Two bytes misalignment happens only for byte and short (char) arrays | |
978 __ testl(from, 2); | |
979 __ jccb(Assembler::zero, L_skip_align2); | |
980 __ movw(rax, Address(from, 0)); | |
981 __ movw(Address(from, to_from, Address::times_1, 0), rax); | |
304 | 982 __ addptr(from, 2); |
0 | 983 __ subl(count, 1<<(shift-1)); |
984 __ BIND(L_skip_align2); | |
985 } | |
986 if (!VM_Version::supports_mmx()) { | |
304 | 987 __ mov(rax, count); // save 'count' |
988 __ shrl(count, shift); // bytes count | |
989 __ addptr(to_from, from);// restore 'to' | |
990 __ rep_mov(); | |
991 __ subptr(to_from, from);// restore 'to_from' | |
992 __ mov(count, rax); // restore 'count' | |
0 | 993 __ jmpb(L_copy_2_bytes); // all dwords were copied |
994 } else { | |
405 | 995 if (!UseUnalignedLoadStores) { |
996 // align to 8 bytes, we know we are 4 byte aligned to start | |
997 __ testptr(from, 4); | |
998 __ jccb(Assembler::zero, L_copy_64_bytes); | |
999 __ movl(rax, Address(from, 0)); | |
1000 __ movl(Address(from, to_from, Address::times_1, 0), rax); | |
1001 __ addptr(from, 4); | |
1002 __ subl(count, 1<<shift); | |
1003 } | |
0 | 1004 __ BIND(L_copy_64_bytes); |
304 | 1005 __ mov(rax, count); |
0 | 1006 __ shrl(rax, shift+1); // 8 bytes chunk count |
1007 // | |
1008 // Copy 8-byte chunks through MMX registers, 8 per iteration of the loop | |
1009 // | |
405 | 1010 if (UseXMMForArrayCopy) { |
1011 xmm_copy_forward(from, to_from, rax); | |
1012 } else { | |
1013 mmx_copy_forward(from, to_from, rax); | |
1014 } | |
0 | 1015 } |
1016 // copy tailing dword | |
1017 __ BIND(L_copy_4_bytes); | |
1018 __ testl(count, 1<<shift); | |
1019 __ jccb(Assembler::zero, L_copy_2_bytes); | |
1020 __ movl(rax, Address(from, 0)); | |
1021 __ movl(Address(from, to_from, Address::times_1, 0), rax); | |
1022 if (t == T_BYTE || t == T_SHORT) { | |
304 | 1023 __ addptr(from, 4); |
0 | 1024 __ BIND(L_copy_2_bytes); |
1025 // copy tailing word | |
1026 __ testl(count, 1<<(shift-1)); | |
1027 __ jccb(Assembler::zero, L_copy_byte); | |
1028 __ movw(rax, Address(from, 0)); | |
1029 __ movw(Address(from, to_from, Address::times_1, 0), rax); | |
1030 if (t == T_BYTE) { | |
304 | 1031 __ addptr(from, 2); |
0 | 1032 __ BIND(L_copy_byte); |
1033 // copy tailing byte | |
1034 __ testl(count, 1); | |
1035 __ jccb(Assembler::zero, L_exit); | |
1036 __ movb(rax, Address(from, 0)); | |
1037 __ movb(Address(from, to_from, Address::times_1, 0), rax); | |
1038 __ BIND(L_exit); | |
1039 } else { | |
1040 __ BIND(L_copy_byte); | |
1041 } | |
1042 } else { | |
1043 __ BIND(L_copy_2_bytes); | |
1044 } | |
1045 | |
1046 if (t == T_OBJECT) { | |
1047 __ movl(count, Address(rsp, 12+12)); // reread 'count' | |
304 | 1048 __ mov(to, saved_to); // restore 'to' |
0 | 1049 gen_write_ref_array_post_barrier(to, count); |
1050 __ BIND(L_0_count); | |
1051 } | |
1052 inc_copy_counter_np(t); | |
304 | 1053 __ pop(rdi); |
1054 __ pop(rsi); | |
0 | 1055 __ leave(); // required for proper stackwalking of RuntimeStub frame |
304 | 1056 __ xorptr(rax, rax); // return 0 |
0 | 1057 __ ret(0); |
1058 return start; | |
1059 } | |
1060 | |
1061 | |
1763 | 1062 address generate_fill(BasicType t, bool aligned, const char *name) { |
1063 __ align(CodeEntryAlignment); | |
1064 StubCodeMark mark(this, "StubRoutines", name); | |
1065 address start = __ pc(); | |
1066 | |
1067 BLOCK_COMMENT("Entry:"); | |
1068 | |
1069 const Register to = rdi; // source array address | |
1070 const Register value = rdx; // value | |
1071 const Register count = rsi; // elements count | |
1072 | |
1073 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
1074 __ push(rsi); | |
1075 __ push(rdi); | |
1076 __ movptr(to , Address(rsp, 12+ 4)); | |
1077 __ movl(value, Address(rsp, 12+ 8)); | |
1078 __ movl(count, Address(rsp, 12+ 12)); | |
1079 | |
1080 __ generate_fill(t, aligned, to, value, count, rax, xmm0); | |
1081 | |
1082 __ pop(rdi); | |
1083 __ pop(rsi); | |
1084 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
1085 __ ret(0); | |
1086 return start; | |
1087 } | |
1088 | |
0 | 1089 address generate_conjoint_copy(BasicType t, bool aligned, |
1090 Address::ScaleFactor sf, | |
1091 address nooverlap_target, | |
2324 | 1092 address* entry, const char *name, |
1093 bool dest_uninitialized = false) { | |
0 | 1094 __ align(CodeEntryAlignment); |
1095 StubCodeMark mark(this, "StubRoutines", name); | |
1096 address start = __ pc(); | |
1097 | |
1098 Label L_0_count, L_exit, L_skip_align1, L_skip_align2, L_copy_byte; | |
1099 Label L_copy_2_bytes, L_copy_4_bytes, L_copy_8_bytes, L_copy_8_bytes_loop; | |
1100 | |
304 | 1101 int shift = Address::times_ptr - sf; |
0 | 1102 |
1103 const Register src = rax; // source array address | |
1104 const Register dst = rdx; // destination array address | |
1105 const Register from = rsi; // source array address | |
1106 const Register to = rdi; // destination array address | |
1107 const Register count = rcx; // elements count | |
1108 const Register end = rax; // array end address | |
1109 | |
1110 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1111 __ push(rsi); |
1112 __ push(rdi); | |
1113 __ movptr(src , Address(rsp, 12+ 4)); // from | |
1114 __ movptr(dst , Address(rsp, 12+ 8)); // to | |
1115 __ movl2ptr(count, Address(rsp, 12+12)); // count | |
0 | 1116 |
1117 if (entry != NULL) { | |
1118 *entry = __ pc(); // Entry point from generic arraycopy stub. | |
1119 BLOCK_COMMENT("Entry:"); | |
1120 } | |
1121 | |
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1122 // nooverlap_target expects arguments in rsi and rdi. |
304 | 1123 __ mov(from, src); |
1124 __ mov(to , dst); | |
0 | 1125 |
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1126 // arrays overlap test: dispatch to disjoint stub if necessary. |
0 | 1127 RuntimeAddress nooverlap(nooverlap_target); |
304 | 1128 __ cmpptr(dst, src); |
1129 __ lea(end, Address(src, count, sf, 0)); // src + count * elem_size | |
0 | 1130 __ jump_cc(Assembler::belowEqual, nooverlap); |
304 | 1131 __ cmpptr(dst, end); |
0 | 1132 __ jump_cc(Assembler::aboveEqual, nooverlap); |
1133 | |
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1134 if (t == T_OBJECT) { |
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1135 __ testl(count, count); |
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1136 __ jcc(Assembler::zero, L_0_count); |
2324 | 1137 gen_write_ref_array_pre_barrier(dst, count, dest_uninitialized); |
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1138 } |
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1139 |
0 | 1140 // copy from high to low |
1141 __ cmpl(count, 2<<shift); // Short arrays (< 8 bytes) copy by element | |
1142 __ jcc(Assembler::below, L_copy_4_bytes); // use unsigned cmp | |
1143 if (t == T_BYTE || t == T_SHORT) { | |
1144 // Align the end of destination array at 4 bytes address boundary | |
304 | 1145 __ lea(end, Address(dst, count, sf, 0)); |
0 | 1146 if (t == T_BYTE) { |
1147 // One byte misalignment happens only for byte arrays | |
1148 __ testl(end, 1); | |
1149 __ jccb(Assembler::zero, L_skip_align1); | |
1150 __ decrement(count); | |
1151 __ movb(rdx, Address(from, count, sf, 0)); | |
1152 __ movb(Address(to, count, sf, 0), rdx); | |
1153 __ BIND(L_skip_align1); | |
1154 } | |
1155 // Two bytes misalignment happens only for byte and short (char) arrays | |
1156 __ testl(end, 2); | |
1157 __ jccb(Assembler::zero, L_skip_align2); | |
304 | 1158 __ subptr(count, 1<<(shift-1)); |
0 | 1159 __ movw(rdx, Address(from, count, sf, 0)); |
1160 __ movw(Address(to, count, sf, 0), rdx); | |
1161 __ BIND(L_skip_align2); | |
1162 __ cmpl(count, 2<<shift); // Short arrays (< 8 bytes) copy by element | |
1163 __ jcc(Assembler::below, L_copy_4_bytes); | |
1164 } | |
1165 | |
1166 if (!VM_Version::supports_mmx()) { | |
1167 __ std(); | |
304 | 1168 __ mov(rax, count); // Save 'count' |
1169 __ mov(rdx, to); // Save 'to' | |
1170 __ lea(rsi, Address(from, count, sf, -4)); | |
1171 __ lea(rdi, Address(to , count, sf, -4)); | |
1172 __ shrptr(count, shift); // bytes count | |
1173 __ rep_mov(); | |
0 | 1174 __ cld(); |
304 | 1175 __ mov(count, rax); // restore 'count' |
0 | 1176 __ andl(count, (1<<shift)-1); // mask the number of rest elements |
304 | 1177 __ movptr(from, Address(rsp, 12+4)); // reread 'from' |
1178 __ mov(to, rdx); // restore 'to' | |
0 | 1179 __ jmpb(L_copy_2_bytes); // all dword were copied |
1180 } else { | |
1181 // Align to 8 bytes the end of array. It is aligned to 4 bytes already. | |
304 | 1182 __ testptr(end, 4); |
0 | 1183 __ jccb(Assembler::zero, L_copy_8_bytes); |
1184 __ subl(count, 1<<shift); | |
1185 __ movl(rdx, Address(from, count, sf, 0)); | |
1186 __ movl(Address(to, count, sf, 0), rdx); | |
1187 __ jmpb(L_copy_8_bytes); | |
1188 | |
1365 | 1189 __ align(OptoLoopAlignment); |
0 | 1190 // Move 8 bytes |
1191 __ BIND(L_copy_8_bytes_loop); | |
405 | 1192 if (UseXMMForArrayCopy) { |
1193 __ movq(xmm0, Address(from, count, sf, 0)); | |
1194 __ movq(Address(to, count, sf, 0), xmm0); | |
1195 } else { | |
1196 __ movq(mmx0, Address(from, count, sf, 0)); | |
1197 __ movq(Address(to, count, sf, 0), mmx0); | |
1198 } | |
0 | 1199 __ BIND(L_copy_8_bytes); |
1200 __ subl(count, 2<<shift); | |
1201 __ jcc(Assembler::greaterEqual, L_copy_8_bytes_loop); | |
1202 __ addl(count, 2<<shift); | |
405 | 1203 if (!UseXMMForArrayCopy) { |
1204 __ emms(); | |
1205 } | |
0 | 1206 } |
1207 __ BIND(L_copy_4_bytes); | |
1208 // copy prefix qword | |
1209 __ testl(count, 1<<shift); | |
1210 __ jccb(Assembler::zero, L_copy_2_bytes); | |
1211 __ movl(rdx, Address(from, count, sf, -4)); | |
1212 __ movl(Address(to, count, sf, -4), rdx); | |
1213 | |
1214 if (t == T_BYTE || t == T_SHORT) { | |
1215 __ subl(count, (1<<shift)); | |
1216 __ BIND(L_copy_2_bytes); | |
1217 // copy prefix dword | |
1218 __ testl(count, 1<<(shift-1)); | |
1219 __ jccb(Assembler::zero, L_copy_byte); | |
1220 __ movw(rdx, Address(from, count, sf, -2)); | |
1221 __ movw(Address(to, count, sf, -2), rdx); | |
1222 if (t == T_BYTE) { | |
1223 __ subl(count, 1<<(shift-1)); | |
1224 __ BIND(L_copy_byte); | |
1225 // copy prefix byte | |
1226 __ testl(count, 1); | |
1227 __ jccb(Assembler::zero, L_exit); | |
1228 __ movb(rdx, Address(from, 0)); | |
1229 __ movb(Address(to, 0), rdx); | |
1230 __ BIND(L_exit); | |
1231 } else { | |
1232 __ BIND(L_copy_byte); | |
1233 } | |
1234 } else { | |
1235 __ BIND(L_copy_2_bytes); | |
1236 } | |
1237 if (t == T_OBJECT) { | |
304 | 1238 __ movl2ptr(count, Address(rsp, 12+12)); // reread count |
0 | 1239 gen_write_ref_array_post_barrier(to, count); |
1240 __ BIND(L_0_count); | |
1241 } | |
1242 inc_copy_counter_np(t); | |
304 | 1243 __ pop(rdi); |
1244 __ pop(rsi); | |
0 | 1245 __ leave(); // required for proper stackwalking of RuntimeStub frame |
304 | 1246 __ xorptr(rax, rax); // return 0 |
0 | 1247 __ ret(0); |
1248 return start; | |
1249 } | |
1250 | |
1251 | |
1252 address generate_disjoint_long_copy(address* entry, const char *name) { | |
1253 __ align(CodeEntryAlignment); | |
1254 StubCodeMark mark(this, "StubRoutines", name); | |
1255 address start = __ pc(); | |
1256 | |
1257 Label L_copy_8_bytes, L_copy_8_bytes_loop; | |
1258 const Register from = rax; // source array address | |
1259 const Register to = rdx; // destination array address | |
1260 const Register count = rcx; // elements count | |
1261 const Register to_from = rdx; // (to - from) | |
1262 | |
1263 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1264 __ movptr(from , Address(rsp, 8+0)); // from |
1265 __ movptr(to , Address(rsp, 8+4)); // to | |
1266 __ movl2ptr(count, Address(rsp, 8+8)); // count | |
0 | 1267 |
1268 *entry = __ pc(); // Entry point from conjoint arraycopy stub. | |
1269 BLOCK_COMMENT("Entry:"); | |
1270 | |
304 | 1271 __ subptr(to, from); // to --> to_from |
0 | 1272 if (VM_Version::supports_mmx()) { |
405 | 1273 if (UseXMMForArrayCopy) { |
1274 xmm_copy_forward(from, to_from, count); | |
1275 } else { | |
1276 mmx_copy_forward(from, to_from, count); | |
1277 } | |
0 | 1278 } else { |
1279 __ jmpb(L_copy_8_bytes); | |
1365 | 1280 __ align(OptoLoopAlignment); |
0 | 1281 __ BIND(L_copy_8_bytes_loop); |
1282 __ fild_d(Address(from, 0)); | |
1283 __ fistp_d(Address(from, to_from, Address::times_1)); | |
304 | 1284 __ addptr(from, 8); |
0 | 1285 __ BIND(L_copy_8_bytes); |
1286 __ decrement(count); | |
1287 __ jcc(Assembler::greaterEqual, L_copy_8_bytes_loop); | |
1288 } | |
1289 inc_copy_counter_np(T_LONG); | |
1290 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1291 __ xorptr(rax, rax); // return 0 |
0 | 1292 __ ret(0); |
1293 return start; | |
1294 } | |
1295 | |
1296 address generate_conjoint_long_copy(address nooverlap_target, | |
1297 address* entry, const char *name) { | |
1298 __ align(CodeEntryAlignment); | |
1299 StubCodeMark mark(this, "StubRoutines", name); | |
1300 address start = __ pc(); | |
1301 | |
1302 Label L_copy_8_bytes, L_copy_8_bytes_loop; | |
1303 const Register from = rax; // source array address | |
1304 const Register to = rdx; // destination array address | |
1305 const Register count = rcx; // elements count | |
1306 const Register end_from = rax; // source array end address | |
1307 | |
1308 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1309 __ movptr(from , Address(rsp, 8+0)); // from |
1310 __ movptr(to , Address(rsp, 8+4)); // to | |
1311 __ movl2ptr(count, Address(rsp, 8+8)); // count | |
0 | 1312 |
1313 *entry = __ pc(); // Entry point from generic arraycopy stub. | |
1314 BLOCK_COMMENT("Entry:"); | |
1315 | |
1316 // arrays overlap test | |
304 | 1317 __ cmpptr(to, from); |
0 | 1318 RuntimeAddress nooverlap(nooverlap_target); |
1319 __ jump_cc(Assembler::belowEqual, nooverlap); | |
304 | 1320 __ lea(end_from, Address(from, count, Address::times_8, 0)); |
1321 __ cmpptr(to, end_from); | |
1322 __ movptr(from, Address(rsp, 8)); // from | |
0 | 1323 __ jump_cc(Assembler::aboveEqual, nooverlap); |
1324 | |
1325 __ jmpb(L_copy_8_bytes); | |
1326 | |
1365 | 1327 __ align(OptoLoopAlignment); |
0 | 1328 __ BIND(L_copy_8_bytes_loop); |
1329 if (VM_Version::supports_mmx()) { | |
405 | 1330 if (UseXMMForArrayCopy) { |
1331 __ movq(xmm0, Address(from, count, Address::times_8)); | |
1332 __ movq(Address(to, count, Address::times_8), xmm0); | |
1333 } else { | |
1334 __ movq(mmx0, Address(from, count, Address::times_8)); | |
1335 __ movq(Address(to, count, Address::times_8), mmx0); | |
1336 } | |
0 | 1337 } else { |
1338 __ fild_d(Address(from, count, Address::times_8)); | |
1339 __ fistp_d(Address(to, count, Address::times_8)); | |
1340 } | |
1341 __ BIND(L_copy_8_bytes); | |
1342 __ decrement(count); | |
1343 __ jcc(Assembler::greaterEqual, L_copy_8_bytes_loop); | |
1344 | |
405 | 1345 if (VM_Version::supports_mmx() && !UseXMMForArrayCopy) { |
0 | 1346 __ emms(); |
1347 } | |
1348 inc_copy_counter_np(T_LONG); | |
1349 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1350 __ xorptr(rax, rax); // return 0 |
0 | 1351 __ ret(0); |
1352 return start; | |
1353 } | |
1354 | |
1355 | |
1356 // Helper for generating a dynamic type check. | |
1357 // The sub_klass must be one of {rbx, rdx, rsi}. | |
1358 // The temp is killed. | |
1359 void generate_type_check(Register sub_klass, | |
1360 Address& super_check_offset_addr, | |
1361 Address& super_klass_addr, | |
1362 Register temp, | |
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1363 Label* L_success, Label* L_failure) { |
0 | 1364 BLOCK_COMMENT("type_check:"); |
1365 | |
1366 Label L_fallthrough; | |
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1367 #define LOCAL_JCC(assembler_con, label_ptr) \ |
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1368 if (label_ptr != NULL) __ jcc(assembler_con, *(label_ptr)); \ |
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1369 else __ jcc(assembler_con, L_fallthrough) /*omit semi*/ |
0 | 1370 |
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1371 // The following is a strange variation of the fast path which requires |
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1372 // one less register, because needed values are on the argument stack. |
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1373 // __ check_klass_subtype_fast_path(sub_klass, *super_klass*, temp, |
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1374 // L_success, L_failure, NULL); |
0 | 1375 assert_different_registers(sub_klass, temp); |
1376 | |
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1377 int sc_offset = in_bytes(Klass::secondary_super_cache_offset()); |
0 | 1378 |
1379 // if the pointers are equal, we are done (e.g., String[] elements) | |
304 | 1380 __ cmpptr(sub_klass, super_klass_addr); |
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1381 LOCAL_JCC(Assembler::equal, L_success); |
0 | 1382 |
1383 // check the supertype display: | |
304 | 1384 __ movl2ptr(temp, super_check_offset_addr); |
0 | 1385 Address super_check_addr(sub_klass, temp, Address::times_1, 0); |
304 | 1386 __ movptr(temp, super_check_addr); // load displayed supertype |
1387 __ cmpptr(temp, super_klass_addr); // test the super type | |
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1388 LOCAL_JCC(Assembler::equal, L_success); |
0 | 1389 |
1390 // if it was a primary super, we can just fail immediately | |
1391 __ cmpl(super_check_offset_addr, sc_offset); | |
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1392 LOCAL_JCC(Assembler::notEqual, L_failure); |
0 | 1393 |
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1394 // The repne_scan instruction uses fixed registers, which will get spilled. |
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1395 // We happen to know this works best when super_klass is in rax. |
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1396 Register super_klass = temp; |
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1397 __ movptr(super_klass, super_klass_addr); |
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1398 __ check_klass_subtype_slow_path(sub_klass, super_klass, noreg, noreg, |
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1399 L_success, L_failure); |
0 | 1400 |
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1401 __ bind(L_fallthrough); |
0 | 1402 |
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1403 if (L_success == NULL) { BLOCK_COMMENT("L_success:"); } |
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1404 if (L_failure == NULL) { BLOCK_COMMENT("L_failure:"); } |
0 | 1405 |
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1406 #undef LOCAL_JCC |
0 | 1407 } |
1408 | |
1409 // | |
1410 // Generate checkcasting array copy stub | |
1411 // | |
1412 // Input: | |
1413 // 4(rsp) - source array address | |
1414 // 8(rsp) - destination array address | |
1415 // 12(rsp) - element count, can be zero | |
1416 // 16(rsp) - size_t ckoff (super_check_offset) | |
1417 // 20(rsp) - oop ckval (super_klass) | |
1418 // | |
1419 // Output: | |
1420 // rax, == 0 - success | |
1421 // rax, == -1^K - failure, where K is partial transfer count | |
1422 // | |
2324 | 1423 address generate_checkcast_copy(const char *name, address* entry, bool dest_uninitialized = false) { |
0 | 1424 __ align(CodeEntryAlignment); |
1425 StubCodeMark mark(this, "StubRoutines", name); | |
1426 address start = __ pc(); | |
1427 | |
1428 Label L_load_element, L_store_element, L_do_card_marks, L_done; | |
1429 | |
1430 // register use: | |
1431 // rax, rdx, rcx -- loop control (end_from, end_to, count) | |
1432 // rdi, rsi -- element access (oop, klass) | |
1433 // rbx, -- temp | |
1434 const Register from = rax; // source array address | |
1435 const Register to = rdx; // destination array address | |
1436 const Register length = rcx; // elements count | |
1437 const Register elem = rdi; // each oop copied | |
1438 const Register elem_klass = rsi; // each elem._klass (sub_klass) | |
1439 const Register temp = rbx; // lone remaining temp | |
1440 | |
1441 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
1442 | |
304 | 1443 __ push(rsi); |
1444 __ push(rdi); | |
1445 __ push(rbx); | |
0 | 1446 |
1447 Address from_arg(rsp, 16+ 4); // from | |
1448 Address to_arg(rsp, 16+ 8); // to | |
1449 Address length_arg(rsp, 16+12); // elements count | |
1450 Address ckoff_arg(rsp, 16+16); // super_check_offset | |
1451 Address ckval_arg(rsp, 16+20); // super_klass | |
1452 | |
1453 // Load up: | |
304 | 1454 __ movptr(from, from_arg); |
1455 __ movptr(to, to_arg); | |
1456 __ movl2ptr(length, length_arg); | |
0 | 1457 |
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1458 if (entry != NULL) { |
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1459 *entry = __ pc(); // Entry point from generic arraycopy stub. |
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1460 BLOCK_COMMENT("Entry:"); |
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1461 } |
0 | 1462 |
1463 //--------------------------------------------------------------- | |
1464 // Assembler stub will be used for this call to arraycopy | |
1465 // if the two arrays are subtypes of Object[] but the | |
1466 // destination array type is not equal to or a supertype | |
1467 // of the source type. Each element must be separately | |
1468 // checked. | |
1469 | |
1470 // Loop-invariant addresses. They are exclusive end pointers. | |
304 | 1471 Address end_from_addr(from, length, Address::times_ptr, 0); |
1472 Address end_to_addr(to, length, Address::times_ptr, 0); | |
0 | 1473 |
1474 Register end_from = from; // re-use | |
1475 Register end_to = to; // re-use | |
1476 Register count = length; // re-use | |
1477 | |
1478 // Loop-variant addresses. They assume post-incremented count < 0. | |
304 | 1479 Address from_element_addr(end_from, count, Address::times_ptr, 0); |
1480 Address to_element_addr(end_to, count, Address::times_ptr, 0); | |
0 | 1481 Address elem_klass_addr(elem, oopDesc::klass_offset_in_bytes()); |
1482 | |
1483 // Copy from low to high addresses, indexed from the end of each array. | |
2324 | 1484 gen_write_ref_array_pre_barrier(to, count, dest_uninitialized); |
304 | 1485 __ lea(end_from, end_from_addr); |
1486 __ lea(end_to, end_to_addr); | |
0 | 1487 assert(length == count, ""); // else fix next line: |
304 | 1488 __ negptr(count); // negate and test the length |
0 | 1489 __ jccb(Assembler::notZero, L_load_element); |
1490 | |
1491 // Empty array: Nothing to do. | |
304 | 1492 __ xorptr(rax, rax); // return 0 on (trivial) success |
0 | 1493 __ jmp(L_done); |
1494 | |
1495 // ======== begin loop ======== | |
1496 // (Loop is rotated; its entry is L_load_element.) | |
1497 // Loop control: | |
1498 // for (count = -count; count != 0; count++) | |
1499 // Base pointers src, dst are biased by 8*count,to last element. | |
1365 | 1500 __ align(OptoLoopAlignment); |
0 | 1501 |
1502 __ BIND(L_store_element); | |
304 | 1503 __ movptr(to_element_addr, elem); // store the oop |
0 | 1504 __ increment(count); // increment the count toward zero |
1505 __ jccb(Assembler::zero, L_do_card_marks); | |
1506 | |
1507 // ======== loop entry is here ======== | |
1508 __ BIND(L_load_element); | |
304 | 1509 __ movptr(elem, from_element_addr); // load the oop |
1510 __ testptr(elem, elem); | |
0 | 1511 __ jccb(Assembler::zero, L_store_element); |
1512 | |
1513 // (Could do a trick here: Remember last successful non-null | |
1514 // element stored and make a quick oop equality check on it.) | |
1515 | |
304 | 1516 __ movptr(elem_klass, elem_klass_addr); // query the object klass |
0 | 1517 generate_type_check(elem_klass, ckoff_arg, ckval_arg, temp, |
1518 &L_store_element, NULL); | |
1519 // (On fall-through, we have failed the element type check.) | |
1520 // ======== end loop ======== | |
1521 | |
1522 // It was a real error; we must depend on the caller to finish the job. | |
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1523 // Register "count" = -1 * number of *remaining* oops, length_arg = *total* oops. |
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1524 // Emit GC store barriers for the oops we have copied (length_arg + count), |
0 | 1525 // and report their number to the caller. |
1526 __ addl(count, length_arg); // transfers = (length - remaining) | |
304 | 1527 __ movl2ptr(rax, count); // save the value |
1528 __ notptr(rax); // report (-1^K) to caller | |
1529 __ movptr(to, to_arg); // reload | |
0 | 1530 assert_different_registers(to, count, rax); |
1531 gen_write_ref_array_post_barrier(to, count); | |
1532 __ jmpb(L_done); | |
1533 | |
1534 // Come here on success only. | |
1535 __ BIND(L_do_card_marks); | |
304 | 1536 __ movl2ptr(count, length_arg); |
1537 __ movptr(to, to_arg); // reload | |
0 | 1538 gen_write_ref_array_post_barrier(to, count); |
304 | 1539 __ xorptr(rax, rax); // return 0 on success |
0 | 1540 |
1541 // Common exit point (success or failure). | |
1542 __ BIND(L_done); | |
304 | 1543 __ pop(rbx); |
1544 __ pop(rdi); | |
1545 __ pop(rsi); | |
0 | 1546 inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr); |
1547 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
1548 __ ret(0); | |
1549 | |
1550 return start; | |
1551 } | |
1552 | |
1553 // | |
1554 // Generate 'unsafe' array copy stub | |
1555 // Though just as safe as the other stubs, it takes an unscaled | |
1556 // size_t argument instead of an element count. | |
1557 // | |
1558 // Input: | |
1559 // 4(rsp) - source array address | |
1560 // 8(rsp) - destination array address | |
1561 // 12(rsp) - byte count, can be zero | |
1562 // | |
1563 // Output: | |
1564 // rax, == 0 - success | |
1565 // rax, == -1 - need to call System.arraycopy | |
1566 // | |
1567 // Examines the alignment of the operands and dispatches | |
1568 // to a long, int, short, or byte copy loop. | |
1569 // | |
1570 address generate_unsafe_copy(const char *name, | |
1571 address byte_copy_entry, | |
1572 address short_copy_entry, | |
1573 address int_copy_entry, | |
1574 address long_copy_entry) { | |
1575 | |
1576 Label L_long_aligned, L_int_aligned, L_short_aligned; | |
1577 | |
1578 __ align(CodeEntryAlignment); | |
1579 StubCodeMark mark(this, "StubRoutines", name); | |
1580 address start = __ pc(); | |
1581 | |
1582 const Register from = rax; // source array address | |
1583 const Register to = rdx; // destination array address | |
1584 const Register count = rcx; // elements count | |
1585 | |
1586 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1587 __ push(rsi); |
1588 __ push(rdi); | |
0 | 1589 Address from_arg(rsp, 12+ 4); // from |
1590 Address to_arg(rsp, 12+ 8); // to | |
1591 Address count_arg(rsp, 12+12); // byte count | |
1592 | |
1593 // Load up: | |
304 | 1594 __ movptr(from , from_arg); |
1595 __ movptr(to , to_arg); | |
1596 __ movl2ptr(count, count_arg); | |
0 | 1597 |
1598 // bump this on entry, not on exit: | |
1599 inc_counter_np(SharedRuntime::_unsafe_array_copy_ctr); | |
1600 | |
1601 const Register bits = rsi; | |
304 | 1602 __ mov(bits, from); |
1603 __ orptr(bits, to); | |
1604 __ orptr(bits, count); | |
0 | 1605 |
1606 __ testl(bits, BytesPerLong-1); | |
1607 __ jccb(Assembler::zero, L_long_aligned); | |
1608 | |
1609 __ testl(bits, BytesPerInt-1); | |
1610 __ jccb(Assembler::zero, L_int_aligned); | |
1611 | |
1612 __ testl(bits, BytesPerShort-1); | |
1613 __ jump_cc(Assembler::notZero, RuntimeAddress(byte_copy_entry)); | |
1614 | |
1615 __ BIND(L_short_aligned); | |
304 | 1616 __ shrptr(count, LogBytesPerShort); // size => short_count |
0 | 1617 __ movl(count_arg, count); // update 'count' |
1618 __ jump(RuntimeAddress(short_copy_entry)); | |
1619 | |
1620 __ BIND(L_int_aligned); | |
304 | 1621 __ shrptr(count, LogBytesPerInt); // size => int_count |
0 | 1622 __ movl(count_arg, count); // update 'count' |
1623 __ jump(RuntimeAddress(int_copy_entry)); | |
1624 | |
1625 __ BIND(L_long_aligned); | |
304 | 1626 __ shrptr(count, LogBytesPerLong); // size => qword_count |
0 | 1627 __ movl(count_arg, count); // update 'count' |
304 | 1628 __ pop(rdi); // Do pops here since jlong_arraycopy stub does not do it. |
1629 __ pop(rsi); | |
0 | 1630 __ jump(RuntimeAddress(long_copy_entry)); |
1631 | |
1632 return start; | |
1633 } | |
1634 | |
1635 | |
1636 // Perform range checks on the proposed arraycopy. | |
1637 // Smashes src_pos and dst_pos. (Uses them up for temps.) | |
1638 void arraycopy_range_checks(Register src, | |
1639 Register src_pos, | |
1640 Register dst, | |
1641 Register dst_pos, | |
1642 Address& length, | |
1643 Label& L_failed) { | |
1644 BLOCK_COMMENT("arraycopy_range_checks:"); | |
1645 const Register src_end = src_pos; // source array end position | |
1646 const Register dst_end = dst_pos; // destination array end position | |
1647 __ addl(src_end, length); // src_pos + length | |
1648 __ addl(dst_end, length); // dst_pos + length | |
1649 | |
1650 // if (src_pos + length > arrayOop(src)->length() ) FAIL; | |
1651 __ cmpl(src_end, Address(src, arrayOopDesc::length_offset_in_bytes())); | |
1652 __ jcc(Assembler::above, L_failed); | |
1653 | |
1654 // if (dst_pos + length > arrayOop(dst)->length() ) FAIL; | |
1655 __ cmpl(dst_end, Address(dst, arrayOopDesc::length_offset_in_bytes())); | |
1656 __ jcc(Assembler::above, L_failed); | |
1657 | |
1658 BLOCK_COMMENT("arraycopy_range_checks done"); | |
1659 } | |
1660 | |
1661 | |
1662 // | |
1663 // Generate generic array copy stubs | |
1664 // | |
1665 // Input: | |
1666 // 4(rsp) - src oop | |
1667 // 8(rsp) - src_pos | |
1668 // 12(rsp) - dst oop | |
1669 // 16(rsp) - dst_pos | |
1670 // 20(rsp) - element count | |
1671 // | |
1672 // Output: | |
1673 // rax, == 0 - success | |
1674 // rax, == -1^K - failure, where K is partial transfer count | |
1675 // | |
1676 address generate_generic_copy(const char *name, | |
1677 address entry_jbyte_arraycopy, | |
1678 address entry_jshort_arraycopy, | |
1679 address entry_jint_arraycopy, | |
1680 address entry_oop_arraycopy, | |
1681 address entry_jlong_arraycopy, | |
1682 address entry_checkcast_arraycopy) { | |
1683 Label L_failed, L_failed_0, L_objArray; | |
1684 | |
1685 { int modulus = CodeEntryAlignment; | |
1686 int target = modulus - 5; // 5 = sizeof jmp(L_failed) | |
1687 int advance = target - (__ offset() % modulus); | |
1688 if (advance < 0) advance += modulus; | |
1689 if (advance > 0) __ nop(advance); | |
1690 } | |
1691 StubCodeMark mark(this, "StubRoutines", name); | |
1692 | |
1693 // Short-hop target to L_failed. Makes for denser prologue code. | |
1694 __ BIND(L_failed_0); | |
1695 __ jmp(L_failed); | |
1696 assert(__ offset() % CodeEntryAlignment == 0, "no further alignment needed"); | |
1697 | |
1698 __ align(CodeEntryAlignment); | |
1699 address start = __ pc(); | |
1700 | |
1701 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
304 | 1702 __ push(rsi); |
1703 __ push(rdi); | |
0 | 1704 |
1705 // bump this on entry, not on exit: | |
1706 inc_counter_np(SharedRuntime::_generic_array_copy_ctr); | |
1707 | |
1708 // Input values | |
1709 Address SRC (rsp, 12+ 4); | |
1710 Address SRC_POS (rsp, 12+ 8); | |
1711 Address DST (rsp, 12+12); | |
1712 Address DST_POS (rsp, 12+16); | |
1713 Address LENGTH (rsp, 12+20); | |
1714 | |
1715 //----------------------------------------------------------------------- | |
1716 // Assembler stub will be used for this call to arraycopy | |
1717 // if the following conditions are met: | |
1718 // | |
1719 // (1) src and dst must not be null. | |
1720 // (2) src_pos must not be negative. | |
1721 // (3) dst_pos must not be negative. | |
1722 // (4) length must not be negative. | |
1723 // (5) src klass and dst klass should be the same and not NULL. | |
1724 // (6) src and dst should be arrays. | |
1725 // (7) src_pos + length must not exceed length of src. | |
1726 // (8) dst_pos + length must not exceed length of dst. | |
1727 // | |
1728 | |
1729 const Register src = rax; // source array oop | |
1730 const Register src_pos = rsi; | |
1731 const Register dst = rdx; // destination array oop | |
1732 const Register dst_pos = rdi; | |
1733 const Register length = rcx; // transfer count | |
1734 | |
1735 // if (src == NULL) return -1; | |
304 | 1736 __ movptr(src, SRC); // src oop |
1737 __ testptr(src, src); | |
0 | 1738 __ jccb(Assembler::zero, L_failed_0); |
1739 | |
1740 // if (src_pos < 0) return -1; | |
304 | 1741 __ movl2ptr(src_pos, SRC_POS); // src_pos |
0 | 1742 __ testl(src_pos, src_pos); |
1743 __ jccb(Assembler::negative, L_failed_0); | |
1744 | |
1745 // if (dst == NULL) return -1; | |
304 | 1746 __ movptr(dst, DST); // dst oop |
1747 __ testptr(dst, dst); | |
0 | 1748 __ jccb(Assembler::zero, L_failed_0); |
1749 | |
1750 // if (dst_pos < 0) return -1; | |
304 | 1751 __ movl2ptr(dst_pos, DST_POS); // dst_pos |
0 | 1752 __ testl(dst_pos, dst_pos); |
1753 __ jccb(Assembler::negative, L_failed_0); | |
1754 | |
1755 // if (length < 0) return -1; | |
304 | 1756 __ movl2ptr(length, LENGTH); // length |
0 | 1757 __ testl(length, length); |
1758 __ jccb(Assembler::negative, L_failed_0); | |
1759 | |
1760 // if (src->klass() == NULL) return -1; | |
1761 Address src_klass_addr(src, oopDesc::klass_offset_in_bytes()); | |
1762 Address dst_klass_addr(dst, oopDesc::klass_offset_in_bytes()); | |
1763 const Register rcx_src_klass = rcx; // array klass | |
304 | 1764 __ movptr(rcx_src_klass, Address(src, oopDesc::klass_offset_in_bytes())); |
0 | 1765 |
1766 #ifdef ASSERT | |
1767 // assert(src->klass() != NULL); | |
1768 BLOCK_COMMENT("assert klasses not null"); | |
1769 { Label L1, L2; | |
304 | 1770 __ testptr(rcx_src_klass, rcx_src_klass); |
0 | 1771 __ jccb(Assembler::notZero, L2); // it is broken if klass is NULL |
1772 __ bind(L1); | |
1773 __ stop("broken null klass"); | |
1774 __ bind(L2); | |
304 | 1775 __ cmpptr(dst_klass_addr, (int32_t)NULL_WORD); |
0 | 1776 __ jccb(Assembler::equal, L1); // this would be broken also |
1777 BLOCK_COMMENT("assert done"); | |
1778 } | |
1779 #endif //ASSERT | |
1780 | |
1781 // Load layout helper (32-bits) | |
1782 // | |
1783 // |array_tag| | header_size | element_type | |log2_element_size| | |
1784 // 32 30 24 16 8 2 0 | |
1785 // | |
1786 // array_tag: typeArray = 0x3, objArray = 0x2, non-array = 0x0 | |
1787 // | |
1788 | |
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1789 int lh_offset = in_bytes(Klass::layout_helper_offset()); |
0 | 1790 Address src_klass_lh_addr(rcx_src_klass, lh_offset); |
1791 | |
1792 // Handle objArrays completely differently... | |
1793 jint objArray_lh = Klass::array_layout_helper(T_OBJECT); | |
1794 __ cmpl(src_klass_lh_addr, objArray_lh); | |
1795 __ jcc(Assembler::equal, L_objArray); | |
1796 | |
1797 // if (src->klass() != dst->klass()) return -1; | |
304 | 1798 __ cmpptr(rcx_src_klass, dst_klass_addr); |
0 | 1799 __ jccb(Assembler::notEqual, L_failed_0); |
1800 | |
1801 const Register rcx_lh = rcx; // layout helper | |
1802 assert(rcx_lh == rcx_src_klass, "known alias"); | |
1803 __ movl(rcx_lh, src_klass_lh_addr); | |
1804 | |
1805 // if (!src->is_Array()) return -1; | |
1806 __ cmpl(rcx_lh, Klass::_lh_neutral_value); | |
1807 __ jcc(Assembler::greaterEqual, L_failed_0); // signed cmp | |
1808 | |
1809 // At this point, it is known to be a typeArray (array_tag 0x3). | |
1810 #ifdef ASSERT | |
1811 { Label L; | |
1812 __ cmpl(rcx_lh, (Klass::_lh_array_tag_type_value << Klass::_lh_array_tag_shift)); | |
1813 __ jcc(Assembler::greaterEqual, L); // signed cmp | |
1814 __ stop("must be a primitive array"); | |
1815 __ bind(L); | |
1816 } | |
1817 #endif | |
1818 | |
1819 assert_different_registers(src, src_pos, dst, dst_pos, rcx_lh); | |
1820 arraycopy_range_checks(src, src_pos, dst, dst_pos, LENGTH, L_failed); | |
1821 | |
1822 // typeArrayKlass | |
1823 // | |
1824 // src_addr = (src + array_header_in_bytes()) + (src_pos << log2elemsize); | |
1825 // dst_addr = (dst + array_header_in_bytes()) + (dst_pos << log2elemsize); | |
1826 // | |
1827 const Register rsi_offset = rsi; // array offset | |
1828 const Register src_array = src; // src array offset | |
1829 const Register dst_array = dst; // dst array offset | |
1830 const Register rdi_elsize = rdi; // log2 element size | |
1831 | |
304 | 1832 __ mov(rsi_offset, rcx_lh); |
1833 __ shrptr(rsi_offset, Klass::_lh_header_size_shift); | |
1834 __ andptr(rsi_offset, Klass::_lh_header_size_mask); // array_offset | |
1835 __ addptr(src_array, rsi_offset); // src array offset | |
1836 __ addptr(dst_array, rsi_offset); // dst array offset | |
1837 __ andptr(rcx_lh, Klass::_lh_log2_element_size_mask); // log2 elsize | |
0 | 1838 |
1839 // next registers should be set before the jump to corresponding stub | |
1840 const Register from = src; // source array address | |
1841 const Register to = dst; // destination array address | |
1842 const Register count = rcx; // elements count | |
1843 // some of them should be duplicated on stack | |
1844 #define FROM Address(rsp, 12+ 4) | |
1845 #define TO Address(rsp, 12+ 8) // Not used now | |
1846 #define COUNT Address(rsp, 12+12) // Only for oop arraycopy | |
1847 | |
1848 BLOCK_COMMENT("scale indexes to element size"); | |
304 | 1849 __ movl2ptr(rsi, SRC_POS); // src_pos |
1850 __ shlptr(rsi); // src_pos << rcx (log2 elsize) | |
0 | 1851 assert(src_array == from, ""); |
304 | 1852 __ addptr(from, rsi); // from = src_array + SRC_POS << log2 elsize |
1853 __ movl2ptr(rdi, DST_POS); // dst_pos | |
1854 __ shlptr(rdi); // dst_pos << rcx (log2 elsize) | |
0 | 1855 assert(dst_array == to, ""); |
304 | 1856 __ addptr(to, rdi); // to = dst_array + DST_POS << log2 elsize |
1857 __ movptr(FROM, from); // src_addr | |
1858 __ mov(rdi_elsize, rcx_lh); // log2 elsize | |
1859 __ movl2ptr(count, LENGTH); // elements count | |
0 | 1860 |
1861 BLOCK_COMMENT("choose copy loop based on element size"); | |
1862 __ cmpl(rdi_elsize, 0); | |
1863 | |
1864 __ jump_cc(Assembler::equal, RuntimeAddress(entry_jbyte_arraycopy)); | |
1865 __ cmpl(rdi_elsize, LogBytesPerShort); | |
1866 __ jump_cc(Assembler::equal, RuntimeAddress(entry_jshort_arraycopy)); | |
1867 __ cmpl(rdi_elsize, LogBytesPerInt); | |
1868 __ jump_cc(Assembler::equal, RuntimeAddress(entry_jint_arraycopy)); | |
1869 #ifdef ASSERT | |
1870 __ cmpl(rdi_elsize, LogBytesPerLong); | |
1871 __ jccb(Assembler::notEqual, L_failed); | |
1872 #endif | |
304 | 1873 __ pop(rdi); // Do pops here since jlong_arraycopy stub does not do it. |
1874 __ pop(rsi); | |
0 | 1875 __ jump(RuntimeAddress(entry_jlong_arraycopy)); |
1876 | |
1877 __ BIND(L_failed); | |
304 | 1878 __ xorptr(rax, rax); |
1879 __ notptr(rax); // return -1 | |
1880 __ pop(rdi); | |
1881 __ pop(rsi); | |
0 | 1882 __ leave(); // required for proper stackwalking of RuntimeStub frame |
1883 __ ret(0); | |
1884 | |
1885 // objArrayKlass | |
1886 __ BIND(L_objArray); | |
1887 // live at this point: rcx_src_klass, src[_pos], dst[_pos] | |
1888 | |
1889 Label L_plain_copy, L_checkcast_copy; | |
1890 // test array classes for subtyping | |
304 | 1891 __ cmpptr(rcx_src_klass, dst_klass_addr); // usual case is exact equality |
0 | 1892 __ jccb(Assembler::notEqual, L_checkcast_copy); |
1893 | |
1894 // Identically typed arrays can be copied without element-wise checks. | |
1895 assert_different_registers(src, src_pos, dst, dst_pos, rcx_src_klass); | |
1896 arraycopy_range_checks(src, src_pos, dst, dst_pos, LENGTH, L_failed); | |
1897 | |
1898 __ BIND(L_plain_copy); | |
304 | 1899 __ movl2ptr(count, LENGTH); // elements count |
1900 __ movl2ptr(src_pos, SRC_POS); // reload src_pos | |
1901 __ lea(from, Address(src, src_pos, Address::times_ptr, | |
1902 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); // src_addr | |
1903 __ movl2ptr(dst_pos, DST_POS); // reload dst_pos | |
1904 __ lea(to, Address(dst, dst_pos, Address::times_ptr, | |
1905 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); // dst_addr | |
1906 __ movptr(FROM, from); // src_addr | |
1907 __ movptr(TO, to); // dst_addr | |
0 | 1908 __ movl(COUNT, count); // count |
1909 __ jump(RuntimeAddress(entry_oop_arraycopy)); | |
1910 | |
1911 __ BIND(L_checkcast_copy); | |
1912 // live at this point: rcx_src_klass, dst[_pos], src[_pos] | |
1913 { | |
1914 // Handy offsets: | |
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1915 int ek_offset = in_bytes(objArrayKlass::element_klass_offset()); |
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1916 int sco_offset = in_bytes(Klass::super_check_offset_offset()); |
0 | 1917 |
1918 Register rsi_dst_klass = rsi; | |
1919 Register rdi_temp = rdi; | |
1920 assert(rsi_dst_klass == src_pos, "expected alias w/ src_pos"); | |
1921 assert(rdi_temp == dst_pos, "expected alias w/ dst_pos"); | |
1922 Address dst_klass_lh_addr(rsi_dst_klass, lh_offset); | |
1923 | |
1924 // Before looking at dst.length, make sure dst is also an objArray. | |
304 | 1925 __ movptr(rsi_dst_klass, dst_klass_addr); |
0 | 1926 __ cmpl(dst_klass_lh_addr, objArray_lh); |
1927 __ jccb(Assembler::notEqual, L_failed); | |
1928 | |
1929 // It is safe to examine both src.length and dst.length. | |
304 | 1930 __ movl2ptr(src_pos, SRC_POS); // reload rsi |
0 | 1931 arraycopy_range_checks(src, src_pos, dst, dst_pos, LENGTH, L_failed); |
1932 // (Now src_pos and dst_pos are killed, but not src and dst.) | |
1933 | |
1934 // We'll need this temp (don't forget to pop it after the type check). | |
304 | 1935 __ push(rbx); |
0 | 1936 Register rbx_src_klass = rbx; |
1937 | |
304 | 1938 __ mov(rbx_src_klass, rcx_src_klass); // spill away from rcx |
1939 __ movptr(rsi_dst_klass, dst_klass_addr); | |
0 | 1940 Address super_check_offset_addr(rsi_dst_klass, sco_offset); |
1941 Label L_fail_array_check; | |
1942 generate_type_check(rbx_src_klass, | |
1943 super_check_offset_addr, dst_klass_addr, | |
1944 rdi_temp, NULL, &L_fail_array_check); | |
1945 // (On fall-through, we have passed the array type check.) | |
304 | 1946 __ pop(rbx); |
0 | 1947 __ jmp(L_plain_copy); |
1948 | |
1949 __ BIND(L_fail_array_check); | |
1950 // Reshuffle arguments so we can call checkcast_arraycopy: | |
1951 | |
1952 // match initial saves for checkcast_arraycopy | |
304 | 1953 // push(rsi); // already done; see above |
1954 // push(rdi); // already done; see above | |
1955 // push(rbx); // already done; see above | |
0 | 1956 |
1957 // Marshal outgoing arguments now, freeing registers. | |
1958 Address from_arg(rsp, 16+ 4); // from | |
1959 Address to_arg(rsp, 16+ 8); // to | |
1960 Address length_arg(rsp, 16+12); // elements count | |
1961 Address ckoff_arg(rsp, 16+16); // super_check_offset | |
1962 Address ckval_arg(rsp, 16+20); // super_klass | |
1963 | |
1964 Address SRC_POS_arg(rsp, 16+ 8); | |
1965 Address DST_POS_arg(rsp, 16+16); | |
1966 Address LENGTH_arg(rsp, 16+20); | |
1967 // push rbx, changed the incoming offsets (why not just use rbp,??) | |
1968 // assert(SRC_POS_arg.disp() == SRC_POS.disp() + 4, ""); | |
1969 | |
304 | 1970 __ movptr(rbx, Address(rsi_dst_klass, ek_offset)); |
1971 __ movl2ptr(length, LENGTH_arg); // reload elements count | |
1972 __ movl2ptr(src_pos, SRC_POS_arg); // reload src_pos | |
1973 __ movl2ptr(dst_pos, DST_POS_arg); // reload dst_pos | |
0 | 1974 |
304 | 1975 __ movptr(ckval_arg, rbx); // destination element type |
0 | 1976 __ movl(rbx, Address(rbx, sco_offset)); |
1977 __ movl(ckoff_arg, rbx); // corresponding class check offset | |
1978 | |
1979 __ movl(length_arg, length); // outgoing length argument | |
1980 | |
304 | 1981 __ lea(from, Address(src, src_pos, Address::times_ptr, |
0 | 1982 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); |
304 | 1983 __ movptr(from_arg, from); |
0 | 1984 |
304 | 1985 __ lea(to, Address(dst, dst_pos, Address::times_ptr, |
0 | 1986 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); |
304 | 1987 __ movptr(to_arg, to); |
0 | 1988 __ jump(RuntimeAddress(entry_checkcast_arraycopy)); |
1989 } | |
1990 | |
1991 return start; | |
1992 } | |
1993 | |
1994 void generate_arraycopy_stubs() { | |
1995 address entry; | |
1996 address entry_jbyte_arraycopy; | |
1997 address entry_jshort_arraycopy; | |
1998 address entry_jint_arraycopy; | |
1999 address entry_oop_arraycopy; | |
2000 address entry_jlong_arraycopy; | |
2001 address entry_checkcast_arraycopy; | |
2002 | |
2003 StubRoutines::_arrayof_jbyte_disjoint_arraycopy = | |
2004 generate_disjoint_copy(T_BYTE, true, Address::times_1, &entry, | |
2005 "arrayof_jbyte_disjoint_arraycopy"); | |
2006 StubRoutines::_arrayof_jbyte_arraycopy = | |
2007 generate_conjoint_copy(T_BYTE, true, Address::times_1, entry, | |
2008 NULL, "arrayof_jbyte_arraycopy"); | |
2009 StubRoutines::_jbyte_disjoint_arraycopy = | |
2010 generate_disjoint_copy(T_BYTE, false, Address::times_1, &entry, | |
2011 "jbyte_disjoint_arraycopy"); | |
2012 StubRoutines::_jbyte_arraycopy = | |
2013 generate_conjoint_copy(T_BYTE, false, Address::times_1, entry, | |
2014 &entry_jbyte_arraycopy, "jbyte_arraycopy"); | |
2015 | |
2016 StubRoutines::_arrayof_jshort_disjoint_arraycopy = | |
2017 generate_disjoint_copy(T_SHORT, true, Address::times_2, &entry, | |
2018 "arrayof_jshort_disjoint_arraycopy"); | |
2019 StubRoutines::_arrayof_jshort_arraycopy = | |
2020 generate_conjoint_copy(T_SHORT, true, Address::times_2, entry, | |
2021 NULL, "arrayof_jshort_arraycopy"); | |
2022 StubRoutines::_jshort_disjoint_arraycopy = | |
2023 generate_disjoint_copy(T_SHORT, false, Address::times_2, &entry, | |
2024 "jshort_disjoint_arraycopy"); | |
2025 StubRoutines::_jshort_arraycopy = | |
2026 generate_conjoint_copy(T_SHORT, false, Address::times_2, entry, | |
2027 &entry_jshort_arraycopy, "jshort_arraycopy"); | |
2028 | |
2029 // Next arrays are always aligned on 4 bytes at least. | |
2030 StubRoutines::_jint_disjoint_arraycopy = | |
2031 generate_disjoint_copy(T_INT, true, Address::times_4, &entry, | |
2032 "jint_disjoint_arraycopy"); | |
2033 StubRoutines::_jint_arraycopy = | |
2034 generate_conjoint_copy(T_INT, true, Address::times_4, entry, | |
2035 &entry_jint_arraycopy, "jint_arraycopy"); | |
2036 | |
2037 StubRoutines::_oop_disjoint_arraycopy = | |
304 | 2038 generate_disjoint_copy(T_OBJECT, true, Address::times_ptr, &entry, |
0 | 2039 "oop_disjoint_arraycopy"); |
2040 StubRoutines::_oop_arraycopy = | |
304 | 2041 generate_conjoint_copy(T_OBJECT, true, Address::times_ptr, entry, |
0 | 2042 &entry_oop_arraycopy, "oop_arraycopy"); |
2043 | |
2324 | 2044 StubRoutines::_oop_disjoint_arraycopy_uninit = |
2045 generate_disjoint_copy(T_OBJECT, true, Address::times_ptr, &entry, | |
2046 "oop_disjoint_arraycopy_uninit", | |
2047 /*dest_uninitialized*/true); | |
2048 StubRoutines::_oop_arraycopy_uninit = | |
2049 generate_conjoint_copy(T_OBJECT, true, Address::times_ptr, entry, | |
2050 NULL, "oop_arraycopy_uninit", | |
2051 /*dest_uninitialized*/true); | |
2052 | |
0 | 2053 StubRoutines::_jlong_disjoint_arraycopy = |
2054 generate_disjoint_long_copy(&entry, "jlong_disjoint_arraycopy"); | |
2055 StubRoutines::_jlong_arraycopy = | |
2056 generate_conjoint_long_copy(entry, &entry_jlong_arraycopy, | |
2057 "jlong_arraycopy"); | |
2058 | |
1763 | 2059 StubRoutines::_jbyte_fill = generate_fill(T_BYTE, false, "jbyte_fill"); |
2060 StubRoutines::_jshort_fill = generate_fill(T_SHORT, false, "jshort_fill"); | |
2061 StubRoutines::_jint_fill = generate_fill(T_INT, false, "jint_fill"); | |
2062 StubRoutines::_arrayof_jbyte_fill = generate_fill(T_BYTE, true, "arrayof_jbyte_fill"); | |
2063 StubRoutines::_arrayof_jshort_fill = generate_fill(T_SHORT, true, "arrayof_jshort_fill"); | |
2064 StubRoutines::_arrayof_jint_fill = generate_fill(T_INT, true, "arrayof_jint_fill"); | |
2065 | |
2324 | 2066 StubRoutines::_arrayof_jint_disjoint_arraycopy = StubRoutines::_jint_disjoint_arraycopy; |
2067 StubRoutines::_arrayof_oop_disjoint_arraycopy = StubRoutines::_oop_disjoint_arraycopy; | |
2068 StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = StubRoutines::_oop_disjoint_arraycopy_uninit; | |
2069 StubRoutines::_arrayof_jlong_disjoint_arraycopy = StubRoutines::_jlong_disjoint_arraycopy; | |
0 | 2070 |
2324 | 2071 StubRoutines::_arrayof_jint_arraycopy = StubRoutines::_jint_arraycopy; |
2072 StubRoutines::_arrayof_oop_arraycopy = StubRoutines::_oop_arraycopy; | |
2073 StubRoutines::_arrayof_oop_arraycopy_uninit = StubRoutines::_oop_arraycopy_uninit; | |
2074 StubRoutines::_arrayof_jlong_arraycopy = StubRoutines::_jlong_arraycopy; | |
0 | 2075 |
2076 StubRoutines::_checkcast_arraycopy = | |
2324 | 2077 generate_checkcast_copy("checkcast_arraycopy", &entry_checkcast_arraycopy); |
2078 StubRoutines::_checkcast_arraycopy_uninit = | |
2079 generate_checkcast_copy("checkcast_arraycopy_uninit", NULL, /*dest_uninitialized*/true); | |
0 | 2080 |
2081 StubRoutines::_unsafe_arraycopy = | |
2082 generate_unsafe_copy("unsafe_arraycopy", | |
2083 entry_jbyte_arraycopy, | |
2084 entry_jshort_arraycopy, | |
2085 entry_jint_arraycopy, | |
2086 entry_jlong_arraycopy); | |
2087 | |
2088 StubRoutines::_generic_arraycopy = | |
2089 generate_generic_copy("generic_arraycopy", | |
2090 entry_jbyte_arraycopy, | |
2091 entry_jshort_arraycopy, | |
2092 entry_jint_arraycopy, | |
2093 entry_oop_arraycopy, | |
2094 entry_jlong_arraycopy, | |
2095 entry_checkcast_arraycopy); | |
2096 } | |
2097 | |
1174
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2098 void generate_math_stubs() { |
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2099 { |
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2100 StubCodeMark mark(this, "StubRoutines", "log"); |
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2101 StubRoutines::_intrinsic_log = (double (*)(double)) __ pc(); |
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2102 |
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2103 __ fld_d(Address(rsp, 4)); |
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2104 __ flog(); |
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2105 __ ret(0); |
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2106 } |
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2107 { |
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2108 StubCodeMark mark(this, "StubRoutines", "log10"); |
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2109 StubRoutines::_intrinsic_log10 = (double (*)(double)) __ pc(); |
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2110 |
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2111 __ fld_d(Address(rsp, 4)); |
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2112 __ flog10(); |
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2113 __ ret(0); |
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2114 } |
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2115 { |
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2116 StubCodeMark mark(this, "StubRoutines", "sin"); |
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2117 StubRoutines::_intrinsic_sin = (double (*)(double)) __ pc(); |
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2118 |
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2119 __ fld_d(Address(rsp, 4)); |
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2120 __ trigfunc('s'); |
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2121 __ ret(0); |
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2122 } |
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2123 { |
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2124 StubCodeMark mark(this, "StubRoutines", "cos"); |
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2125 StubRoutines::_intrinsic_cos = (double (*)(double)) __ pc(); |
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2126 |
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2127 __ fld_d(Address(rsp, 4)); |
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2128 __ trigfunc('c'); |
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2129 __ ret(0); |
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2130 } |
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2131 { |
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2132 StubCodeMark mark(this, "StubRoutines", "tan"); |
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2133 StubRoutines::_intrinsic_tan = (double (*)(double)) __ pc(); |
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2134 |
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2135 __ fld_d(Address(rsp, 4)); |
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2136 __ trigfunc('t'); |
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2137 __ ret(0); |
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2138 } |
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2139 |
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2140 // The intrinsic version of these seem to return the same value as |
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2141 // the strict version. |
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2142 StubRoutines::_intrinsic_exp = SharedRuntime::dexp; |
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2143 StubRoutines::_intrinsic_pow = SharedRuntime::dpow; |
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2144 } |
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2145 |
0 | 2146 public: |
2147 // Information about frame layout at time of blocking runtime call. | |
2148 // Note that we only have to preserve callee-saved registers since | |
2149 // the compilers are responsible for supplying a continuation point | |
2150 // if they expect all registers to be preserved. | |
2151 enum layout { | |
2152 thread_off, // last_java_sp | |
3451
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2153 arg1_off, |
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2154 arg2_off, |
0 | 2155 rbp_off, // callee saved register |
2156 ret_pc, | |
2157 framesize | |
2158 }; | |
2159 | |
2160 private: | |
2161 | |
2162 #undef __ | |
2163 #define __ masm-> | |
2164 | |
2165 //------------------------------------------------------------------------------------------------------------------------ | |
2166 // Continuation point for throwing of implicit exceptions that are not handled in | |
2167 // the current activation. Fabricates an exception oop and initiates normal | |
2168 // exception dispatching in this frame. | |
2169 // | |
2170 // Previously the compiler (c2) allowed for callee save registers on Java calls. | |
2171 // This is no longer true after adapter frames were removed but could possibly | |
2172 // be brought back in the future if the interpreter code was reworked and it | |
2173 // was deemed worthwhile. The comment below was left to describe what must | |
2174 // happen here if callee saves were resurrected. As it stands now this stub | |
2175 // could actually be a vanilla BufferBlob and have now oopMap at all. | |
2176 // Since it doesn't make much difference we've chosen to leave it the | |
2177 // way it was in the callee save days and keep the comment. | |
2178 | |
2179 // If we need to preserve callee-saved values we need a callee-saved oop map and | |
2180 // therefore have to make these stubs into RuntimeStubs rather than BufferBlobs. | |
2181 // If the compiler needs all registers to be preserved between the fault | |
2182 // point and the exception handler then it must assume responsibility for that in | |
2183 // AbstractCompiler::continuation_for_implicit_null_exception or | |
2184 // continuation_for_implicit_division_by_zero_exception. All other implicit | |
2185 // exceptions (e.g., NullPointerException or AbstractMethodError on entry) are | |
2186 // either at call sites or otherwise assume that stack unwinding will be initiated, | |
2187 // so caller saved registers were assumed volatile in the compiler. | |
2188 address generate_throw_exception(const char* name, address runtime_entry, | |
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2189 Register arg1 = noreg, Register arg2 = noreg) { |
0 | 2190 |
2191 int insts_size = 256; | |
2192 int locs_size = 32; | |
2193 | |
2194 CodeBuffer code(name, insts_size, locs_size); | |
2195 OopMapSet* oop_maps = new OopMapSet(); | |
2196 MacroAssembler* masm = new MacroAssembler(&code); | |
2197 | |
2198 address start = __ pc(); | |
2199 | |
2200 // This is an inlined and slightly modified version of call_VM | |
2201 // which has the ability to fetch the return PC out of | |
2202 // thread-local storage and also sets up last_Java_sp slightly | |
2203 // differently than the real call_VM | |
2204 Register java_thread = rbx; | |
2205 __ get_thread(java_thread); | |
2206 | |
2207 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
2208 | |
2209 // pc and rbp, already pushed | |
304 | 2210 __ subptr(rsp, (framesize-2) * wordSize); // prolog |
0 | 2211 |
2212 // Frame is now completed as far as size and linkage. | |
2213 | |
2214 int frame_complete = __ pc() - start; | |
2215 | |
2216 // push java thread (becomes first argument of C function) | |
304 | 2217 __ movptr(Address(rsp, thread_off * wordSize), java_thread); |
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2218 if (arg1 != noreg) { |
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2219 __ movptr(Address(rsp, arg1_off * wordSize), arg1); |
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2220 } |
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2221 if (arg2 != noreg) { |
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2222 assert(arg1 != noreg, "missing reg arg"); |
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2223 __ movptr(Address(rsp, arg2_off * wordSize), arg2); |
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2224 } |
0 | 2225 |
2226 // Set up last_Java_sp and last_Java_fp | |
2227 __ set_last_Java_frame(java_thread, rsp, rbp, NULL); | |
2228 | |
2229 // Call runtime | |
2230 BLOCK_COMMENT("call runtime_entry"); | |
2231 __ call(RuntimeAddress(runtime_entry)); | |
2232 // Generate oop map | |
2233 OopMap* map = new OopMap(framesize, 0); | |
2234 oop_maps->add_gc_map(__ pc() - start, map); | |
2235 | |
2236 // restore the thread (cannot use the pushed argument since arguments | |
2237 // may be overwritten by C code generated by an optimizing compiler); | |
2238 // however can use the register value directly if it is callee saved. | |
2239 __ get_thread(java_thread); | |
2240 | |
2241 __ reset_last_Java_frame(java_thread, true, false); | |
2242 | |
2243 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
2244 | |
2245 // check for pending exceptions | |
2246 #ifdef ASSERT | |
2247 Label L; | |
304 | 2248 __ cmpptr(Address(java_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 2249 __ jcc(Assembler::notEqual, L); |
2250 __ should_not_reach_here(); | |
2251 __ bind(L); | |
2252 #endif /* ASSERT */ | |
2253 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
2254 | |
2255 | |
2256 RuntimeStub* stub = RuntimeStub::new_runtime_stub(name, &code, frame_complete, framesize, oop_maps, false); | |
2257 return stub->entry_point(); | |
2258 } | |
2259 | |
2260 | |
2261 void create_control_words() { | |
2262 // Round to nearest, 53-bit mode, exceptions masked | |
2263 StubRoutines::_fpu_cntrl_wrd_std = 0x027F; | |
2264 // Round to zero, 53-bit mode, exception mased | |
2265 StubRoutines::_fpu_cntrl_wrd_trunc = 0x0D7F; | |
2266 // Round to nearest, 24-bit mode, exceptions masked | |
2267 StubRoutines::_fpu_cntrl_wrd_24 = 0x007F; | |
2268 // Round to nearest, 64-bit mode, exceptions masked | |
2269 StubRoutines::_fpu_cntrl_wrd_64 = 0x037F; | |
2270 // Round to nearest, 64-bit mode, exceptions masked | |
2271 StubRoutines::_mxcsr_std = 0x1F80; | |
2272 // Note: the following two constants are 80-bit values | |
2273 // layout is critical for correct loading by FPU. | |
2274 // Bias for strict fp multiply/divide | |
2275 StubRoutines::_fpu_subnormal_bias1[0]= 0x00000000; // 2^(-15360) == 0x03ff 8000 0000 0000 0000 | |
2276 StubRoutines::_fpu_subnormal_bias1[1]= 0x80000000; | |
2277 StubRoutines::_fpu_subnormal_bias1[2]= 0x03ff; | |
2278 // Un-Bias for strict fp multiply/divide | |
2279 StubRoutines::_fpu_subnormal_bias2[0]= 0x00000000; // 2^(+15360) == 0x7bff 8000 0000 0000 0000 | |
2280 StubRoutines::_fpu_subnormal_bias2[1]= 0x80000000; | |
2281 StubRoutines::_fpu_subnormal_bias2[2]= 0x7bff; | |
2282 } | |
2283 | |
2284 //--------------------------------------------------------------------------- | |
2285 // Initialization | |
2286 | |
2287 void generate_initial() { | |
2288 // Generates all stubs and initializes the entry points | |
2289 | |
2290 //------------------------------------------------------------------------------------------------------------------------ | |
2291 // entry points that exist in all platforms | |
2292 // Note: This is code that could be shared among different platforms - however the benefit seems to be smaller than | |
2293 // the disadvantage of having a much more complicated generator structure. See also comment in stubRoutines.hpp. | |
2294 StubRoutines::_forward_exception_entry = generate_forward_exception(); | |
2295 | |
2296 StubRoutines::_call_stub_entry = | |
2297 generate_call_stub(StubRoutines::_call_stub_return_address); | |
2298 // is referenced by megamorphic call | |
2299 StubRoutines::_catch_exception_entry = generate_catch_exception(); | |
2300 | |
2301 // These are currently used by Solaris/Intel | |
2302 StubRoutines::_atomic_xchg_entry = generate_atomic_xchg(); | |
2303 | |
2304 StubRoutines::_handler_for_unsafe_access_entry = | |
2305 generate_handler_for_unsafe_access(); | |
2306 | |
2307 // platform dependent | |
2308 create_control_words(); | |
2309 | |
304 | 2310 StubRoutines::x86::_verify_mxcsr_entry = generate_verify_mxcsr(); |
2311 StubRoutines::x86::_verify_fpu_cntrl_wrd_entry = generate_verify_fpu_cntrl_wrd(); | |
0 | 2312 StubRoutines::_d2i_wrapper = generate_d2i_wrapper(T_INT, |
2313 CAST_FROM_FN_PTR(address, SharedRuntime::d2i)); | |
2314 StubRoutines::_d2l_wrapper = generate_d2i_wrapper(T_LONG, | |
2315 CAST_FROM_FN_PTR(address, SharedRuntime::d2l)); | |
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2316 |
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2317 // Build this early so it's available for the interpreter |
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2318 StubRoutines::_throw_WrongMethodTypeException_entry = |
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2319 generate_throw_exception("WrongMethodTypeException throw_exception", |
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2320 CAST_FROM_FN_PTR(address, SharedRuntime::throw_WrongMethodTypeException), |
3937 | 2321 rax, rcx); |
4743 | 2322 |
2323 // Build this early so it's available for the interpreter | |
2324 StubRoutines::_throw_StackOverflowError_entry = generate_throw_exception("StackOverflowError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_StackOverflowError)); | |
0 | 2325 } |
2326 | |
2327 | |
2328 void generate_all() { | |
2329 // Generates all stubs and initializes the entry points | |
2330 | |
2331 // These entry points require SharedInfo::stack0 to be set up in non-core builds | |
2332 // and need to be relocatable, so they each fabricate a RuntimeStub internally. | |
3937 | 2333 StubRoutines::_throw_AbstractMethodError_entry = generate_throw_exception("AbstractMethodError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_AbstractMethodError)); |
2334 StubRoutines::_throw_IncompatibleClassChangeError_entry= generate_throw_exception("IncompatibleClassChangeError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_IncompatibleClassChangeError)); | |
2335 StubRoutines::_throw_NullPointerException_at_call_entry= generate_throw_exception("NullPointerException at call throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException_at_call)); | |
0 | 2336 |
2337 //------------------------------------------------------------------------------------------------------------------------ | |
2338 // entry points that are platform specific | |
2339 | |
2340 // support for verify_oop (must happen after universe_init) | |
2341 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop(); | |
2342 | |
2343 // arraycopy stubs used by compilers | |
2344 generate_arraycopy_stubs(); | |
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2346 generate_math_stubs(); |
0 | 2347 } |
2348 | |
2349 | |
2350 public: | |
2351 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) { | |
2352 if (all) { | |
2353 generate_all(); | |
2354 } else { | |
2355 generate_initial(); | |
2356 } | |
2357 } | |
2358 }; // end class declaration | |
2359 | |
2360 | |
2361 void StubGenerator_generate(CodeBuffer* code, bool all) { | |
2362 StubGenerator g(code, all); | |
2363 } |