Mercurial > hg > truffle
annotate src/cpu/x86/vm/stubGenerator_x86_32.cpp @ 3937:c565834fb592
7088020: SEGV in JNIHandleBlock::release_block
Reviewed-by: kvn, twisti
| author | never |
|---|---|
| date | Sat, 10 Sep 2011 00:11:04 -0700 |
| parents | d83ac25d0304 |
| children | f08d439fab8c |
| rev | line source |
|---|---|
| 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 | |
| 50 #ifdef COMPILER2 | |
| 51 #include "opto/runtime.hpp" | |
| 52 #endif | |
| 0 | 53 |
| 54 // Declaration and definition of StubGenerator (no .hpp file). | |
| 55 // For a more detailed description of the stub routine structure | |
| 56 // see the comment in stubRoutines.hpp | |
| 57 | |
| 58 #define __ _masm-> | |
| 304 | 59 #define a__ ((Assembler*)_masm)-> |
| 0 | 60 |
| 61 #ifdef PRODUCT | |
| 62 #define BLOCK_COMMENT(str) /* nothing */ | |
| 63 #else | |
| 64 #define BLOCK_COMMENT(str) __ block_comment(str) | |
| 65 #endif | |
| 66 | |
| 67 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") | |
| 68 | |
| 69 const int MXCSR_MASK = 0xFFC0; // Mask out any pending exceptions | |
| 70 const int FPU_CNTRL_WRD_MASK = 0xFFFF; | |
| 71 | |
| 72 // ------------------------------------------------------------------------------------------------------------------------- | |
| 73 // Stub Code definitions | |
| 74 | |
| 75 static address handle_unsafe_access() { | |
| 76 JavaThread* thread = JavaThread::current(); | |
| 77 address pc = thread->saved_exception_pc(); | |
| 78 // pc is the instruction which we must emulate | |
| 79 // doing a no-op is fine: return garbage from the load | |
| 80 // therefore, compute npc | |
| 81 address npc = Assembler::locate_next_instruction(pc); | |
| 82 | |
| 83 // request an async exception | |
| 84 thread->set_pending_unsafe_access_error(); | |
| 85 | |
| 86 // return address of next instruction to execute | |
| 87 return npc; | |
| 88 } | |
| 89 | |
| 90 class StubGenerator: public StubCodeGenerator { | |
| 91 private: | |
| 92 | |
| 93 #ifdef PRODUCT | |
| 94 #define inc_counter_np(counter) (0) | |
| 95 #else | |
| 96 void inc_counter_np_(int& counter) { | |
| 304 | 97 __ incrementl(ExternalAddress((address)&counter)); |
| 0 | 98 } |
| 99 #define inc_counter_np(counter) \ | |
| 100 BLOCK_COMMENT("inc_counter " #counter); \ | |
| 101 inc_counter_np_(counter); | |
| 102 #endif //PRODUCT | |
| 103 | |
| 104 void inc_copy_counter_np(BasicType t) { | |
| 105 #ifndef PRODUCT | |
| 106 switch (t) { | |
| 107 case T_BYTE: inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr); return; | |
| 108 case T_SHORT: inc_counter_np(SharedRuntime::_jshort_array_copy_ctr); return; | |
| 109 case T_INT: inc_counter_np(SharedRuntime::_jint_array_copy_ctr); return; | |
| 110 case T_LONG: inc_counter_np(SharedRuntime::_jlong_array_copy_ctr); return; | |
| 111 case T_OBJECT: inc_counter_np(SharedRuntime::_oop_array_copy_ctr); return; | |
| 112 } | |
| 113 ShouldNotReachHere(); | |
| 114 #endif //PRODUCT | |
| 115 } | |
| 116 | |
| 117 //------------------------------------------------------------------------------------------------------------------------ | |
| 118 // Call stubs are used to call Java from C | |
| 119 // | |
| 120 // [ return_from_Java ] <--- rsp | |
| 121 // [ argument word n ] | |
| 122 // ... | |
| 123 // -N [ argument word 1 ] | |
| 124 // -7 [ Possible padding for stack alignment ] | |
| 125 // -6 [ Possible padding for stack alignment ] | |
| 126 // -5 [ Possible padding for stack alignment ] | |
| 127 // -4 [ mxcsr save ] <--- rsp_after_call | |
| 128 // -3 [ saved rbx, ] | |
| 129 // -2 [ saved rsi ] | |
| 130 // -1 [ saved rdi ] | |
| 131 // 0 [ saved rbp, ] <--- rbp, | |
| 132 // 1 [ return address ] | |
| 133 // 2 [ ptr. to call wrapper ] | |
| 134 // 3 [ result ] | |
| 135 // 4 [ result_type ] | |
| 136 // 5 [ method ] | |
| 137 // 6 [ entry_point ] | |
| 138 // 7 [ parameters ] | |
| 139 // 8 [ parameter_size ] | |
| 140 // 9 [ thread ] | |
| 141 | |
| 142 | |
| 143 address generate_call_stub(address& return_address) { | |
| 144 StubCodeMark mark(this, "StubRoutines", "call_stub"); | |
| 145 address start = __ pc(); | |
| 146 | |
| 147 // stub code parameters / addresses | |
| 148 assert(frame::entry_frame_call_wrapper_offset == 2, "adjust this code"); | |
| 149 bool sse_save = false; | |
| 150 const Address rsp_after_call(rbp, -4 * wordSize); // same as in generate_catch_exception()! | |
| 151 const int locals_count_in_bytes (4*wordSize); | |
| 152 const Address mxcsr_save (rbp, -4 * wordSize); | |
| 153 const Address saved_rbx (rbp, -3 * wordSize); | |
| 154 const Address saved_rsi (rbp, -2 * wordSize); | |
| 155 const Address saved_rdi (rbp, -1 * wordSize); | |
| 156 const Address result (rbp, 3 * wordSize); | |
| 157 const Address result_type (rbp, 4 * wordSize); | |
| 158 const Address method (rbp, 5 * wordSize); | |
| 159 const Address entry_point (rbp, 6 * wordSize); | |
| 160 const Address parameters (rbp, 7 * wordSize); | |
| 161 const Address parameter_size(rbp, 8 * wordSize); | |
| 162 const Address thread (rbp, 9 * wordSize); // same as in generate_catch_exception()! | |
| 163 sse_save = UseSSE > 0; | |
| 164 | |
| 165 // stub code | |
| 166 __ enter(); | |
| 304 | 167 __ movptr(rcx, parameter_size); // parameter counter |
| 1506 | 168 __ shlptr(rcx, Interpreter::logStackElementSize); // convert parameter count to bytes |
| 304 | 169 __ addptr(rcx, locals_count_in_bytes); // reserve space for register saves |
| 170 __ subptr(rsp, rcx); | |
| 171 __ andptr(rsp, -(StackAlignmentInBytes)); // Align stack | |
| 0 | 172 |
| 173 // save rdi, rsi, & rbx, according to C calling conventions | |
| 304 | 174 __ movptr(saved_rdi, rdi); |
| 175 __ movptr(saved_rsi, rsi); | |
| 176 __ movptr(saved_rbx, rbx); | |
| 0 | 177 // save and initialize %mxcsr |
| 178 if (sse_save) { | |
| 179 Label skip_ldmx; | |
| 180 __ stmxcsr(mxcsr_save); | |
| 181 __ movl(rax, mxcsr_save); | |
| 182 __ andl(rax, MXCSR_MASK); // Only check control and mask bits | |
| 183 ExternalAddress mxcsr_std(StubRoutines::addr_mxcsr_std()); | |
| 184 __ cmp32(rax, mxcsr_std); | |
| 185 __ jcc(Assembler::equal, skip_ldmx); | |
| 186 __ ldmxcsr(mxcsr_std); | |
| 187 __ bind(skip_ldmx); | |
| 188 } | |
| 189 | |
| 190 // make sure the control word is correct. | |
| 191 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); | |
| 192 | |
| 193 #ifdef ASSERT | |
| 194 // make sure we have no pending exceptions | |
| 195 { Label L; | |
| 304 | 196 __ movptr(rcx, thread); |
| 197 __ cmpptr(Address(rcx, Thread::pending_exception_offset()), (int32_t)NULL_WORD); | |
| 0 | 198 __ jcc(Assembler::equal, L); |
| 199 __ stop("StubRoutines::call_stub: entered with pending exception"); | |
| 200 __ bind(L); | |
| 201 } | |
| 202 #endif | |
| 203 | |
| 204 // pass parameters if any | |
| 205 BLOCK_COMMENT("pass parameters if any"); | |
| 206 Label parameters_done; | |
| 207 __ movl(rcx, parameter_size); // parameter counter | |
| 208 __ testl(rcx, rcx); | |
| 209 __ jcc(Assembler::zero, parameters_done); | |
| 210 | |
| 211 // parameter passing loop | |
| 212 | |
| 213 Label loop; | |
| 214 // Copy Java parameters in reverse order (receiver last) | |
| 215 // Note that the argument order is inverted in the process | |
| 216 // source is rdx[rcx: N-1..0] | |
| 217 // dest is rsp[rbx: 0..N-1] | |
| 218 | |
| 304 | 219 __ movptr(rdx, parameters); // parameter pointer |
| 220 __ xorptr(rbx, rbx); | |
| 0 | 221 |
| 222 __ BIND(loop); | |
| 223 | |
| 224 // get parameter | |
| 304 | 225 __ movptr(rax, Address(rdx, rcx, Interpreter::stackElementScale(), -wordSize)); |
| 226 __ movptr(Address(rsp, rbx, Interpreter::stackElementScale(), | |
| 0 | 227 Interpreter::expr_offset_in_bytes(0)), rax); // store parameter |
| 228 __ increment(rbx); | |
| 229 __ decrement(rcx); | |
| 230 __ jcc(Assembler::notZero, loop); | |
| 231 | |
| 232 // call Java function | |
| 233 __ BIND(parameters_done); | |
| 304 | 234 __ movptr(rbx, method); // get methodOop |
| 235 __ movptr(rax, entry_point); // get entry_point | |
| 236 __ mov(rsi, rsp); // set sender sp | |
| 0 | 237 BLOCK_COMMENT("call Java function"); |
| 238 __ call(rax); | |
| 239 | |
| 240 BLOCK_COMMENT("call_stub_return_address:"); | |
| 241 return_address = __ pc(); | |
| 242 | |
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243 #ifdef COMPILER2 |
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244 { |
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245 Label L_skip; |
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246 if (UseSSE >= 2) { |
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247 __ verify_FPU(0, "call_stub_return"); |
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248 } else { |
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249 for (int i = 1; i < 8; i++) { |
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250 __ ffree(i); |
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251 } |
| 0 | 252 |
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253 // UseSSE <= 1 so double result should be left on TOS |
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254 __ movl(rsi, result_type); |
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255 __ cmpl(rsi, T_DOUBLE); |
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256 __ jcc(Assembler::equal, L_skip); |
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257 if (UseSSE == 0) { |
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258 // UseSSE == 0 so float result should be left on TOS |
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259 __ cmpl(rsi, T_FLOAT); |
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260 __ jcc(Assembler::equal, L_skip); |
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261 } |
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262 __ ffree(0); |
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263 } |
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264 __ BIND(L_skip); |
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265 } |
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266 #endif // COMPILER2 |
| 0 | 267 |
| 268 // store result depending on type | |
| 269 // (everything that is not T_LONG, T_FLOAT or T_DOUBLE is treated as T_INT) | |
| 304 | 270 __ movptr(rdi, result); |
| 0 | 271 Label is_long, is_float, is_double, exit; |
| 272 __ movl(rsi, result_type); | |
| 273 __ cmpl(rsi, T_LONG); | |
| 274 __ jcc(Assembler::equal, is_long); | |
| 275 __ cmpl(rsi, T_FLOAT); | |
| 276 __ jcc(Assembler::equal, is_float); | |
| 277 __ cmpl(rsi, T_DOUBLE); | |
| 278 __ jcc(Assembler::equal, is_double); | |
| 279 | |
| 280 // handle T_INT case | |
| 281 __ movl(Address(rdi, 0), rax); | |
| 282 __ BIND(exit); | |
| 283 | |
| 284 // check that FPU stack is empty | |
| 285 __ verify_FPU(0, "generate_call_stub"); | |
| 286 | |
| 287 // pop parameters | |
| 304 | 288 __ lea(rsp, rsp_after_call); |
| 0 | 289 |
| 290 // restore %mxcsr | |
| 291 if (sse_save) { | |
| 292 __ ldmxcsr(mxcsr_save); | |
| 293 } | |
| 294 | |
| 295 // restore rdi, rsi and rbx, | |
| 304 | 296 __ movptr(rbx, saved_rbx); |
| 297 __ movptr(rsi, saved_rsi); | |
| 298 __ movptr(rdi, saved_rdi); | |
| 299 __ addptr(rsp, 4*wordSize); | |
| 0 | 300 |
| 301 // return | |
| 304 | 302 __ pop(rbp); |
| 0 | 303 __ ret(0); |
| 304 | |
| 305 // handle return types different from T_INT | |
| 306 __ BIND(is_long); | |
| 307 __ movl(Address(rdi, 0 * wordSize), rax); | |
| 308 __ movl(Address(rdi, 1 * wordSize), rdx); | |
| 309 __ jmp(exit); | |
| 310 | |
| 311 __ BIND(is_float); | |
| 312 // interpreter uses xmm0 for return values | |
| 313 if (UseSSE >= 1) { | |
| 314 __ movflt(Address(rdi, 0), xmm0); | |
| 315 } else { | |
| 316 __ fstp_s(Address(rdi, 0)); | |
| 317 } | |
| 318 __ jmp(exit); | |
| 319 | |
| 320 __ BIND(is_double); | |
| 321 // interpreter uses xmm0 for return values | |
| 322 if (UseSSE >= 2) { | |
| 323 __ movdbl(Address(rdi, 0), xmm0); | |
| 324 } else { | |
| 325 __ fstp_d(Address(rdi, 0)); | |
| 326 } | |
| 327 __ jmp(exit); | |
| 328 | |
| 329 return start; | |
| 330 } | |
| 331 | |
| 332 | |
| 333 //------------------------------------------------------------------------------------------------------------------------ | |
| 334 // Return point for a Java call if there's an exception thrown in Java code. | |
| 335 // The exception is caught and transformed into a pending exception stored in | |
| 336 // JavaThread that can be tested from within the VM. | |
| 337 // | |
| 338 // Note: Usually the parameters are removed by the callee. In case of an exception | |
| 339 // crossing an activation frame boundary, that is not the case if the callee | |
| 340 // is compiled code => need to setup the rsp. | |
| 341 // | |
| 342 // rax,: exception oop | |
| 343 | |
| 344 address generate_catch_exception() { | |
| 345 StubCodeMark mark(this, "StubRoutines", "catch_exception"); | |
| 346 const Address rsp_after_call(rbp, -4 * wordSize); // same as in generate_call_stub()! | |
| 347 const Address thread (rbp, 9 * wordSize); // same as in generate_call_stub()! | |
| 348 address start = __ pc(); | |
| 349 | |
| 350 // get thread directly | |
| 304 | 351 __ movptr(rcx, thread); |
| 0 | 352 #ifdef ASSERT |
| 353 // verify that threads correspond | |
| 354 { Label L; | |
| 355 __ get_thread(rbx); | |
| 304 | 356 __ cmpptr(rbx, rcx); |
| 0 | 357 __ jcc(Assembler::equal, L); |
| 358 __ stop("StubRoutines::catch_exception: threads must correspond"); | |
| 359 __ bind(L); | |
| 360 } | |
| 361 #endif | |
| 362 // set pending exception | |
| 363 __ verify_oop(rax); | |
| 304 | 364 __ movptr(Address(rcx, Thread::pending_exception_offset()), rax ); |
| 0 | 365 __ lea(Address(rcx, Thread::exception_file_offset ()), |
| 366 ExternalAddress((address)__FILE__)); | |
| 367 __ movl(Address(rcx, Thread::exception_line_offset ()), __LINE__ ); | |
| 368 // complete return to VM | |
| 369 assert(StubRoutines::_call_stub_return_address != NULL, "_call_stub_return_address must have been generated before"); | |
| 370 __ jump(RuntimeAddress(StubRoutines::_call_stub_return_address)); | |
| 371 | |
| 372 return start; | |
| 373 } | |
| 374 | |
| 375 | |
| 376 //------------------------------------------------------------------------------------------------------------------------ | |
| 377 // Continuation point for runtime calls returning with a pending exception. | |
| 378 // The pending exception check happened in the runtime or native call stub. | |
| 379 // The pending exception in Thread is converted into a Java-level exception. | |
| 380 // | |
| 381 // Contract with Java-level exception handlers: | |
| 1295 | 382 // rax: exception |
| 0 | 383 // rdx: throwing pc |
| 384 // | |
| 385 // NOTE: At entry of this stub, exception-pc must be on stack !! | |
| 386 | |
| 387 address generate_forward_exception() { | |
| 388 StubCodeMark mark(this, "StubRoutines", "forward exception"); | |
| 389 address start = __ pc(); | |
| 1295 | 390 const Register thread = rcx; |
| 391 | |
| 392 // other registers used in this stub | |
| 393 const Register exception_oop = rax; | |
| 394 const Register handler_addr = rbx; | |
| 395 const Register exception_pc = rdx; | |
| 0 | 396 |
| 397 // Upon entry, the sp points to the return address returning into Java | |
| 398 // (interpreted or compiled) code; i.e., the return address becomes the | |
| 399 // throwing pc. | |
| 400 // | |
| 401 // Arguments pushed before the runtime call are still on the stack but | |
| 402 // the exception handler will reset the stack pointer -> ignore them. | |
| 403 // A potential result in registers can be ignored as well. | |
| 404 | |
| 405 #ifdef ASSERT | |
| 406 // make sure this code is only executed if there is a pending exception | |
| 407 { Label L; | |
| 1295 | 408 __ get_thread(thread); |
| 409 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); | |
| 0 | 410 __ jcc(Assembler::notEqual, L); |
| 411 __ stop("StubRoutines::forward exception: no pending exception (1)"); | |
| 412 __ bind(L); | |
| 413 } | |
| 414 #endif | |
| 415 | |
| 416 // compute exception handler into rbx, | |
| 1295 | 417 __ get_thread(thread); |
| 418 __ movptr(exception_pc, Address(rsp, 0)); | |
| 0 | 419 BLOCK_COMMENT("call exception_handler_for_return_address"); |
| 1295 | 420 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), thread, exception_pc); |
| 421 __ mov(handler_addr, rax); | |
| 0 | 422 |
| 1295 | 423 // setup rax & rdx, remove return address & clear pending exception |
| 424 __ get_thread(thread); | |
| 425 __ pop(exception_pc); | |
| 426 __ movptr(exception_oop, Address(thread, Thread::pending_exception_offset())); | |
| 427 __ movptr(Address(thread, Thread::pending_exception_offset()), NULL_WORD); | |
| 0 | 428 |
| 429 #ifdef ASSERT | |
| 430 // make sure exception is set | |
| 431 { Label L; | |
| 1295 | 432 __ testptr(exception_oop, exception_oop); |
| 0 | 433 __ jcc(Assembler::notEqual, L); |
| 434 __ stop("StubRoutines::forward exception: no pending exception (2)"); | |
| 435 __ bind(L); | |
| 436 } | |
| 437 #endif | |
| 438 | |
| 1295 | 439 // Verify that there is really a valid exception in RAX. |
| 440 __ verify_oop(exception_oop); | |
| 441 | |
| 0 | 442 // continue at exception handler (return address removed) |
| 1295 | 443 // rax: exception |
| 444 // rbx: exception handler | |
| 0 | 445 // rdx: throwing pc |
| 1295 | 446 __ jmp(handler_addr); |
| 0 | 447 |
| 448 return start; | |
| 449 } | |
| 450 | |
| 451 | |
| 452 //---------------------------------------------------------------------------------------------------- | |
| 453 // Support for jint Atomic::xchg(jint exchange_value, volatile jint* dest) | |
| 454 // | |
| 455 // xchg exists as far back as 8086, lock needed for MP only | |
| 456 // Stack layout immediately after call: | |
| 457 // | |
| 458 // 0 [ret addr ] <--- rsp | |
| 459 // 1 [ ex ] | |
| 460 // 2 [ dest ] | |
| 461 // | |
| 462 // Result: *dest <- ex, return (old *dest) | |
| 463 // | |
| 464 // Note: win32 does not currently use this code | |
| 465 | |
| 466 address generate_atomic_xchg() { | |
| 467 StubCodeMark mark(this, "StubRoutines", "atomic_xchg"); | |
| 468 address start = __ pc(); | |
| 469 | |
| 304 | 470 __ push(rdx); |
| 0 | 471 Address exchange(rsp, 2 * wordSize); |
| 472 Address dest_addr(rsp, 3 * wordSize); | |
| 473 __ movl(rax, exchange); | |
| 304 | 474 __ movptr(rdx, dest_addr); |
| 475 __ xchgl(rax, Address(rdx, 0)); | |
| 476 __ pop(rdx); | |
| 0 | 477 __ ret(0); |
| 478 | |
| 479 return start; | |
| 480 } | |
| 481 | |
| 482 //---------------------------------------------------------------------------------------------------- | |
| 483 // Support for void verify_mxcsr() | |
| 484 // | |
| 485 // This routine is used with -Xcheck:jni to verify that native | |
| 486 // JNI code does not return to Java code without restoring the | |
| 487 // MXCSR register to our expected state. | |
| 488 | |
| 489 | |
| 490 address generate_verify_mxcsr() { | |
| 491 StubCodeMark mark(this, "StubRoutines", "verify_mxcsr"); | |
| 492 address start = __ pc(); | |
| 493 | |
| 494 const Address mxcsr_save(rsp, 0); | |
| 495 | |
| 496 if (CheckJNICalls && UseSSE > 0 ) { | |
| 497 Label ok_ret; | |
| 498 ExternalAddress mxcsr_std(StubRoutines::addr_mxcsr_std()); | |
| 304 | 499 __ push(rax); |
| 500 __ subptr(rsp, wordSize); // allocate a temp location | |
| 0 | 501 __ stmxcsr(mxcsr_save); |
| 502 __ movl(rax, mxcsr_save); | |
| 503 __ andl(rax, MXCSR_MASK); | |
| 504 __ cmp32(rax, mxcsr_std); | |
| 505 __ jcc(Assembler::equal, ok_ret); | |
| 506 | |
| 507 __ warn("MXCSR changed by native JNI code."); | |
| 508 | |
| 509 __ ldmxcsr(mxcsr_std); | |
| 510 | |
| 511 __ bind(ok_ret); | |
| 304 | 512 __ addptr(rsp, wordSize); |
| 513 __ pop(rax); | |
| 0 | 514 } |
| 515 | |
| 516 __ ret(0); | |
| 517 | |
| 518 return start; | |
| 519 } | |
| 520 | |
| 521 | |
| 522 //--------------------------------------------------------------------------- | |
| 523 // Support for void verify_fpu_cntrl_wrd() | |
| 524 // | |
| 525 // This routine is used with -Xcheck:jni to verify that native | |
| 526 // JNI code does not return to Java code without restoring the | |
| 527 // FP control word to our expected state. | |
| 528 | |
| 529 address generate_verify_fpu_cntrl_wrd() { | |
| 530 StubCodeMark mark(this, "StubRoutines", "verify_spcw"); | |
| 531 address start = __ pc(); | |
| 532 | |
| 533 const Address fpu_cntrl_wrd_save(rsp, 0); | |
| 534 | |
| 535 if (CheckJNICalls) { | |
| 536 Label ok_ret; | |
| 304 | 537 __ push(rax); |
| 538 __ subptr(rsp, wordSize); // allocate a temp location | |
| 0 | 539 __ fnstcw(fpu_cntrl_wrd_save); |
| 540 __ movl(rax, fpu_cntrl_wrd_save); | |
| 541 __ andl(rax, FPU_CNTRL_WRD_MASK); | |
| 542 ExternalAddress fpu_std(StubRoutines::addr_fpu_cntrl_wrd_std()); | |
| 543 __ cmp32(rax, fpu_std); | |
| 544 __ jcc(Assembler::equal, ok_ret); | |
| 545 | |
| 546 __ warn("Floating point control word changed by native JNI code."); | |
| 547 | |
| 548 __ fldcw(fpu_std); | |
| 549 | |
| 550 __ bind(ok_ret); | |
| 304 | 551 __ addptr(rsp, wordSize); |
| 552 __ pop(rax); | |
| 0 | 553 } |
| 554 | |
| 555 __ ret(0); | |
| 556 | |
| 557 return start; | |
| 558 } | |
| 559 | |
| 560 //--------------------------------------------------------------------------- | |
| 561 // Wrapper for slow-case handling of double-to-integer conversion | |
| 562 // d2i or f2i fast case failed either because it is nan or because | |
| 563 // of under/overflow. | |
| 564 // Input: FPU TOS: float value | |
| 565 // Output: rax, (rdx): integer (long) result | |
| 566 | |
| 567 address generate_d2i_wrapper(BasicType t, address fcn) { | |
| 568 StubCodeMark mark(this, "StubRoutines", "d2i_wrapper"); | |
| 569 address start = __ pc(); | |
| 570 | |
| 571 // Capture info about frame layout | |
| 572 enum layout { FPUState_off = 0, | |
| 573 rbp_off = FPUStateSizeInWords, | |
| 574 rdi_off, | |
| 575 rsi_off, | |
| 576 rcx_off, | |
| 577 rbx_off, | |
| 578 saved_argument_off, | |
| 579 saved_argument_off2, // 2nd half of double | |
| 580 framesize | |
| 581 }; | |
| 582 | |
| 583 assert(FPUStateSizeInWords == 27, "update stack layout"); | |
| 584 | |
| 585 // Save outgoing argument to stack across push_FPU_state() | |
| 304 | 586 __ subptr(rsp, wordSize * 2); |
| 0 | 587 __ fstp_d(Address(rsp, 0)); |
| 588 | |
| 589 // Save CPU & FPU state | |
| 304 | 590 __ push(rbx); |
| 591 __ push(rcx); | |
| 592 __ push(rsi); | |
| 593 __ push(rdi); | |
| 594 __ push(rbp); | |
| 0 | 595 __ push_FPU_state(); |
| 596 | |
| 597 // push_FPU_state() resets the FP top of stack | |
| 598 // Load original double into FP top of stack | |
| 599 __ fld_d(Address(rsp, saved_argument_off * wordSize)); | |
| 600 // Store double into stack as outgoing argument | |
| 304 | 601 __ subptr(rsp, wordSize*2); |
| 0 | 602 __ fst_d(Address(rsp, 0)); |
| 603 | |
| 604 // Prepare FPU for doing math in C-land | |
| 605 __ empty_FPU_stack(); | |
| 606 // Call the C code to massage the double. Result in EAX | |
| 607 if (t == T_INT) | |
| 608 { BLOCK_COMMENT("SharedRuntime::d2i"); } | |
| 609 else if (t == T_LONG) | |
| 610 { BLOCK_COMMENT("SharedRuntime::d2l"); } | |
| 611 __ call_VM_leaf( fcn, 2 ); | |
| 612 | |
| 613 // Restore CPU & FPU state | |
| 614 __ pop_FPU_state(); | |
| 304 | 615 __ pop(rbp); |
| 616 __ pop(rdi); | |
| 617 __ pop(rsi); | |
| 618 __ pop(rcx); | |
| 619 __ pop(rbx); | |
| 620 __ addptr(rsp, wordSize * 2); | |
| 0 | 621 |
| 622 __ ret(0); | |
| 623 | |
| 624 return start; | |
| 625 } | |
| 626 | |
| 627 | |
| 628 //--------------------------------------------------------------------------- | |
| 629 // The following routine generates a subroutine to throw an asynchronous | |
| 630 // UnknownError when an unsafe access gets a fault that could not be | |
| 631 // reasonably prevented by the programmer. (Example: SIGBUS/OBJERR.) | |
| 632 address generate_handler_for_unsafe_access() { | |
| 633 StubCodeMark mark(this, "StubRoutines", "handler_for_unsafe_access"); | |
| 634 address start = __ pc(); | |
| 635 | |
| 304 | 636 __ push(0); // hole for return address-to-be |
| 637 __ pusha(); // push registers | |
| 0 | 638 Address next_pc(rsp, RegisterImpl::number_of_registers * BytesPerWord); |
| 639 BLOCK_COMMENT("call handle_unsafe_access"); | |
| 640 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, handle_unsafe_access))); | |
| 304 | 641 __ movptr(next_pc, rax); // stuff next address |
| 642 __ popa(); | |
| 0 | 643 __ ret(0); // jump to next address |
| 644 | |
| 645 return start; | |
| 646 } | |
| 647 | |
| 648 | |
| 649 //---------------------------------------------------------------------------------------------------- | |
| 650 // Non-destructive plausibility checks for oops | |
| 651 | |
| 652 address generate_verify_oop() { | |
| 653 StubCodeMark mark(this, "StubRoutines", "verify_oop"); | |
| 654 address start = __ pc(); | |
| 655 | |
| 656 // Incoming arguments on stack after saving rax,: | |
| 657 // | |
| 658 // [tos ]: saved rdx | |
| 659 // [tos + 1]: saved EFLAGS | |
| 660 // [tos + 2]: return address | |
| 661 // [tos + 3]: char* error message | |
| 662 // [tos + 4]: oop object to verify | |
| 663 // [tos + 5]: saved rax, - saved by caller and bashed | |
| 664 | |
| 665 Label exit, error; | |
| 304 | 666 __ pushf(); |
| 667 __ incrementl(ExternalAddress((address) StubRoutines::verify_oop_count_addr())); | |
| 668 __ push(rdx); // save rdx | |
| 0 | 669 // make sure object is 'reasonable' |
| 304 | 670 __ movptr(rax, Address(rsp, 4 * wordSize)); // get object |
| 671 __ testptr(rax, rax); | |
| 0 | 672 __ jcc(Assembler::zero, exit); // if obj is NULL it is ok |
| 673 | |
| 674 // Check if the oop is in the right area of memory | |
| 675 const int oop_mask = Universe::verify_oop_mask(); | |
| 676 const int oop_bits = Universe::verify_oop_bits(); | |
| 304 | 677 __ mov(rdx, rax); |
| 678 __ andptr(rdx, oop_mask); | |
| 679 __ cmpptr(rdx, oop_bits); | |
| 0 | 680 __ jcc(Assembler::notZero, error); |
| 681 | |
| 682 // make sure klass is 'reasonable' | |
| 304 | 683 __ movptr(rax, Address(rax, oopDesc::klass_offset_in_bytes())); // get klass |
| 684 __ testptr(rax, rax); | |
| 0 | 685 __ jcc(Assembler::zero, error); // if klass is NULL it is broken |
| 686 | |
| 687 // Check if the klass is in the right area of memory | |
| 688 const int klass_mask = Universe::verify_klass_mask(); | |
| 689 const int klass_bits = Universe::verify_klass_bits(); | |
| 304 | 690 __ mov(rdx, rax); |
| 691 __ andptr(rdx, klass_mask); | |
| 692 __ cmpptr(rdx, klass_bits); | |
| 0 | 693 __ jcc(Assembler::notZero, error); |
| 694 | |
| 695 // make sure klass' klass is 'reasonable' | |
| 304 | 696 __ movptr(rax, Address(rax, oopDesc::klass_offset_in_bytes())); // get klass' klass |
| 697 __ testptr(rax, rax); | |
| 0 | 698 __ jcc(Assembler::zero, error); // if klass' klass is NULL it is broken |
| 699 | |
| 304 | 700 __ mov(rdx, rax); |
| 701 __ andptr(rdx, klass_mask); | |
| 702 __ cmpptr(rdx, klass_bits); | |
| 0 | 703 __ jcc(Assembler::notZero, error); // if klass not in right area |
| 704 // of memory it is broken too. | |
| 705 | |
| 706 // return if everything seems ok | |
| 707 __ bind(exit); | |
| 304 | 708 __ movptr(rax, Address(rsp, 5 * wordSize)); // get saved rax, back |
| 709 __ pop(rdx); // restore rdx | |
| 710 __ popf(); // restore EFLAGS | |
| 0 | 711 __ ret(3 * wordSize); // pop arguments |
| 712 | |
| 713 // handle errors | |
| 714 __ bind(error); | |
| 304 | 715 __ movptr(rax, Address(rsp, 5 * wordSize)); // get saved rax, back |
| 716 __ pop(rdx); // get saved rdx back | |
| 717 __ popf(); // get saved EFLAGS off stack -- will be ignored | |
| 718 __ pusha(); // push registers (eip = return address & msg are already pushed) | |
| 0 | 719 BLOCK_COMMENT("call MacroAssembler::debug"); |
| 304 | 720 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug32))); |
| 721 __ popa(); | |
| 0 | 722 __ ret(3 * wordSize); // pop arguments |
| 723 return start; | |
| 724 } | |
| 725 | |
| 726 // | |
| 727 // Generate pre-barrier for array stores | |
| 728 // | |
| 729 // Input: | |
| 730 // start - starting address | |
|
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731 // count - element count |
| 2324 | 732 void gen_write_ref_array_pre_barrier(Register start, Register count, bool uninitialized_target) { |
| 0 | 733 assert_different_registers(start, count); |
| 734 BarrierSet* bs = Universe::heap()->barrier_set(); | |
| 735 switch (bs->kind()) { | |
| 736 case BarrierSet::G1SATBCT: | |
| 737 case BarrierSet::G1SATBCTLogging: | |
| 2324 | 738 // With G1, don't generate the call if we statically know that the target in uninitialized |
| 739 if (!uninitialized_target) { | |
| 740 __ pusha(); // push registers | |
| 741 __ call_VM_leaf(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_pre), | |
| 742 start, count); | |
| 743 __ popa(); | |
| 744 } | |
| 0 | 745 break; |
| 746 case BarrierSet::CardTableModRef: | |
| 747 case BarrierSet::CardTableExtension: | |
| 748 case BarrierSet::ModRef: | |
| 749 break; | |
| 750 default : | |
| 751 ShouldNotReachHere(); | |
| 752 | |
| 753 } | |
| 754 } | |
| 755 | |
| 756 | |
| 757 // | |
| 758 // Generate a post-barrier for an array store | |
| 759 // | |
| 760 // start - starting address | |
| 761 // count - element count | |
| 762 // | |
| 763 // The two input registers are overwritten. | |
| 764 // | |
| 765 void gen_write_ref_array_post_barrier(Register start, Register count) { | |
| 766 BarrierSet* bs = Universe::heap()->barrier_set(); | |
| 767 assert_different_registers(start, count); | |
| 768 switch (bs->kind()) { | |
| 769 case BarrierSet::G1SATBCT: | |
| 770 case BarrierSet::G1SATBCTLogging: | |
| 771 { | |
| 304 | 772 __ pusha(); // push registers |
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773 __ call_VM_leaf(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_post), |
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774 start, count); |
| 304 | 775 __ popa(); |
| 0 | 776 } |
| 777 break; | |
| 778 | |
| 779 case BarrierSet::CardTableModRef: | |
| 780 case BarrierSet::CardTableExtension: | |
| 781 { | |
| 782 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | |
| 783 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); | |
| 784 | |
| 785 Label L_loop; | |
| 786 const Register end = count; // elements count; end == start+count-1 | |
| 787 assert_different_registers(start, end); | |
| 788 | |
| 304 | 789 __ lea(end, Address(start, count, Address::times_ptr, -wordSize)); |
| 790 __ shrptr(start, CardTableModRefBS::card_shift); | |
| 791 __ shrptr(end, CardTableModRefBS::card_shift); | |
| 792 __ subptr(end, start); // end --> count | |
| 0 | 793 __ BIND(L_loop); |
|
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794 intptr_t disp = (intptr_t) ct->byte_map_base; |
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795 Address cardtable(start, count, Address::times_1, disp); |
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796 __ movb(cardtable, 0); |
| 0 | 797 __ decrement(count); |
| 798 __ jcc(Assembler::greaterEqual, L_loop); | |
| 799 } | |
| 800 break; | |
| 801 case BarrierSet::ModRef: | |
| 802 break; | |
| 803 default : | |
| 804 ShouldNotReachHere(); | |
| 805 | |
| 806 } | |
| 807 } | |
| 808 | |
| 405 | 809 |
| 810 // Copy 64 bytes chunks | |
| 811 // | |
| 812 // Inputs: | |
| 813 // from - source array address | |
| 814 // to_from - destination array address - from | |
| 815 // qword_count - 8-bytes element count, negative | |
| 816 // | |
| 817 void xmm_copy_forward(Register from, Register to_from, Register qword_count) { | |
| 818 assert( UseSSE >= 2, "supported cpu only" ); | |
| 819 Label L_copy_64_bytes_loop, L_copy_64_bytes, L_copy_8_bytes, L_exit; | |
| 820 // Copy 64-byte chunks | |
| 821 __ jmpb(L_copy_64_bytes); | |
| 1365 | 822 __ align(OptoLoopAlignment); |
| 405 | 823 __ BIND(L_copy_64_bytes_loop); |
| 824 | |
| 825 if(UseUnalignedLoadStores) { | |
| 826 __ movdqu(xmm0, Address(from, 0)); | |
| 827 __ movdqu(Address(from, to_from, Address::times_1, 0), xmm0); | |
| 828 __ movdqu(xmm1, Address(from, 16)); | |
| 829 __ movdqu(Address(from, to_from, Address::times_1, 16), xmm1); | |
| 830 __ movdqu(xmm2, Address(from, 32)); | |
| 831 __ movdqu(Address(from, to_from, Address::times_1, 32), xmm2); | |
| 832 __ movdqu(xmm3, Address(from, 48)); | |
| 833 __ movdqu(Address(from, to_from, Address::times_1, 48), xmm3); | |
| 834 | |
| 835 } else { | |
| 836 __ movq(xmm0, Address(from, 0)); | |
| 837 __ movq(Address(from, to_from, Address::times_1, 0), xmm0); | |
| 838 __ movq(xmm1, Address(from, 8)); | |
| 839 __ movq(Address(from, to_from, Address::times_1, 8), xmm1); | |
| 840 __ movq(xmm2, Address(from, 16)); | |
| 841 __ movq(Address(from, to_from, Address::times_1, 16), xmm2); | |
| 842 __ movq(xmm3, Address(from, 24)); | |
| 843 __ movq(Address(from, to_from, Address::times_1, 24), xmm3); | |
| 844 __ movq(xmm4, Address(from, 32)); | |
| 845 __ movq(Address(from, to_from, Address::times_1, 32), xmm4); | |
| 846 __ movq(xmm5, Address(from, 40)); | |
| 847 __ movq(Address(from, to_from, Address::times_1, 40), xmm5); | |
| 848 __ movq(xmm6, Address(from, 48)); | |
| 849 __ movq(Address(from, to_from, Address::times_1, 48), xmm6); | |
| 850 __ movq(xmm7, Address(from, 56)); | |
| 851 __ movq(Address(from, to_from, Address::times_1, 56), xmm7); | |
| 852 } | |
| 853 | |
| 854 __ addl(from, 64); | |
| 855 __ BIND(L_copy_64_bytes); | |
| 856 __ subl(qword_count, 8); | |
| 857 __ jcc(Assembler::greaterEqual, L_copy_64_bytes_loop); | |
| 858 __ addl(qword_count, 8); | |
| 859 __ jccb(Assembler::zero, L_exit); | |
| 860 // | |
| 861 // length is too short, just copy qwords | |
| 862 // | |
| 863 __ BIND(L_copy_8_bytes); | |
| 864 __ movq(xmm0, Address(from, 0)); | |
| 865 __ movq(Address(from, to_from, Address::times_1), xmm0); | |
| 866 __ addl(from, 8); | |
| 867 __ decrement(qword_count); | |
| 868 __ jcc(Assembler::greater, L_copy_8_bytes); | |
| 869 __ BIND(L_exit); | |
| 870 } | |
| 871 | |
| 0 | 872 // Copy 64 bytes chunks |
| 873 // | |
| 874 // Inputs: | |
| 875 // from - source array address | |
| 876 // to_from - destination array address - from | |
| 877 // qword_count - 8-bytes element count, negative | |
| 878 // | |
| 879 void mmx_copy_forward(Register from, Register to_from, Register qword_count) { | |
| 405 | 880 assert( VM_Version::supports_mmx(), "supported cpu only" ); |
| 0 | 881 Label L_copy_64_bytes_loop, L_copy_64_bytes, L_copy_8_bytes, L_exit; |
| 882 // Copy 64-byte chunks | |
| 883 __ jmpb(L_copy_64_bytes); | |
| 1365 | 884 __ align(OptoLoopAlignment); |
| 0 | 885 __ BIND(L_copy_64_bytes_loop); |
| 886 __ movq(mmx0, Address(from, 0)); | |
| 887 __ movq(mmx1, Address(from, 8)); | |
| 888 __ movq(mmx2, Address(from, 16)); | |
| 889 __ movq(Address(from, to_from, Address::times_1, 0), mmx0); | |
| 890 __ movq(mmx3, Address(from, 24)); | |
| 891 __ movq(Address(from, to_from, Address::times_1, 8), mmx1); | |
| 892 __ movq(mmx4, Address(from, 32)); | |
| 893 __ movq(Address(from, to_from, Address::times_1, 16), mmx2); | |
| 894 __ movq(mmx5, Address(from, 40)); | |
| 895 __ movq(Address(from, to_from, Address::times_1, 24), mmx3); | |
| 896 __ movq(mmx6, Address(from, 48)); | |
| 897 __ movq(Address(from, to_from, Address::times_1, 32), mmx4); | |
| 898 __ movq(mmx7, Address(from, 56)); | |
| 899 __ movq(Address(from, to_from, Address::times_1, 40), mmx5); | |
| 900 __ movq(Address(from, to_from, Address::times_1, 48), mmx6); | |
| 901 __ movq(Address(from, to_from, Address::times_1, 56), mmx7); | |
| 304 | 902 __ addptr(from, 64); |
| 0 | 903 __ BIND(L_copy_64_bytes); |
| 904 __ subl(qword_count, 8); | |
| 905 __ jcc(Assembler::greaterEqual, L_copy_64_bytes_loop); | |
| 906 __ addl(qword_count, 8); | |
| 907 __ jccb(Assembler::zero, L_exit); | |
| 908 // | |
| 909 // length is too short, just copy qwords | |
| 910 // | |
| 911 __ BIND(L_copy_8_bytes); | |
| 912 __ movq(mmx0, Address(from, 0)); | |
| 913 __ movq(Address(from, to_from, Address::times_1), mmx0); | |
| 304 | 914 __ addptr(from, 8); |
| 0 | 915 __ decrement(qword_count); |
| 916 __ jcc(Assembler::greater, L_copy_8_bytes); | |
| 917 __ BIND(L_exit); | |
| 918 __ emms(); | |
| 919 } | |
| 920 | |
| 921 address generate_disjoint_copy(BasicType t, bool aligned, | |
| 922 Address::ScaleFactor sf, | |
| 2324 | 923 address* entry, const char *name, |
| 924 bool dest_uninitialized = false) { | |
| 0 | 925 __ align(CodeEntryAlignment); |
| 926 StubCodeMark mark(this, "StubRoutines", name); | |
| 927 address start = __ pc(); | |
| 928 | |
| 929 Label L_0_count, L_exit, L_skip_align1, L_skip_align2, L_copy_byte; | |
| 930 Label L_copy_2_bytes, L_copy_4_bytes, L_copy_64_bytes; | |
| 931 | |
| 304 | 932 int shift = Address::times_ptr - sf; |
| 0 | 933 |
| 934 const Register from = rsi; // source array address | |
| 935 const Register to = rdi; // destination array address | |
| 936 const Register count = rcx; // elements count | |
| 937 const Register to_from = to; // (to - from) | |
| 938 const Register saved_to = rdx; // saved destination array address | |
| 939 | |
| 940 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
| 304 | 941 __ push(rsi); |
| 942 __ push(rdi); | |
| 943 __ movptr(from , Address(rsp, 12+ 4)); | |
| 944 __ movptr(to , Address(rsp, 12+ 8)); | |
| 0 | 945 __ movl(count, Address(rsp, 12+ 12)); |
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946 |
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947 if (entry != NULL) { |
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948 *entry = __ pc(); // Entry point from conjoint arraycopy stub. |
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949 BLOCK_COMMENT("Entry:"); |
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950 } |
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951 |
| 0 | 952 if (t == T_OBJECT) { |
| 953 __ testl(count, count); | |
| 954 __ jcc(Assembler::zero, L_0_count); | |
| 2324 | 955 gen_write_ref_array_pre_barrier(to, count, dest_uninitialized); |
| 304 | 956 __ mov(saved_to, to); // save 'to' |
| 0 | 957 } |
| 958 | |
| 304 | 959 __ subptr(to, from); // to --> to_from |
| 0 | 960 __ cmpl(count, 2<<shift); // Short arrays (< 8 bytes) copy by element |
| 961 __ jcc(Assembler::below, L_copy_4_bytes); // use unsigned cmp | |
| 405 | 962 if (!UseUnalignedLoadStores && !aligned && (t == T_BYTE || t == T_SHORT)) { |
| 0 | 963 // align source address at 4 bytes address boundary |
| 964 if (t == T_BYTE) { | |
| 965 // One byte misalignment happens only for byte arrays | |
| 966 __ testl(from, 1); | |
| 967 __ jccb(Assembler::zero, L_skip_align1); | |
| 968 __ movb(rax, Address(from, 0)); | |
| 969 __ movb(Address(from, to_from, Address::times_1, 0), rax); | |
| 970 __ increment(from); | |
| 971 __ decrement(count); | |
| 972 __ BIND(L_skip_align1); | |
| 973 } | |
| 974 // Two bytes misalignment happens only for byte and short (char) arrays | |
| 975 __ testl(from, 2); | |
| 976 __ jccb(Assembler::zero, L_skip_align2); | |
| 977 __ movw(rax, Address(from, 0)); | |
| 978 __ movw(Address(from, to_from, Address::times_1, 0), rax); | |
| 304 | 979 __ addptr(from, 2); |
| 0 | 980 __ subl(count, 1<<(shift-1)); |
| 981 __ BIND(L_skip_align2); | |
| 982 } | |
| 983 if (!VM_Version::supports_mmx()) { | |
| 304 | 984 __ mov(rax, count); // save 'count' |
| 985 __ shrl(count, shift); // bytes count | |
| 986 __ addptr(to_from, from);// restore 'to' | |
| 987 __ rep_mov(); | |
| 988 __ subptr(to_from, from);// restore 'to_from' | |
| 989 __ mov(count, rax); // restore 'count' | |
| 0 | 990 __ jmpb(L_copy_2_bytes); // all dwords were copied |
| 991 } else { | |
| 405 | 992 if (!UseUnalignedLoadStores) { |
| 993 // align to 8 bytes, we know we are 4 byte aligned to start | |
| 994 __ testptr(from, 4); | |
| 995 __ jccb(Assembler::zero, L_copy_64_bytes); | |
| 996 __ movl(rax, Address(from, 0)); | |
| 997 __ movl(Address(from, to_from, Address::times_1, 0), rax); | |
| 998 __ addptr(from, 4); | |
| 999 __ subl(count, 1<<shift); | |
| 1000 } | |
| 0 | 1001 __ BIND(L_copy_64_bytes); |
| 304 | 1002 __ mov(rax, count); |
| 0 | 1003 __ shrl(rax, shift+1); // 8 bytes chunk count |
| 1004 // | |
| 1005 // Copy 8-byte chunks through MMX registers, 8 per iteration of the loop | |
| 1006 // | |
| 405 | 1007 if (UseXMMForArrayCopy) { |
| 1008 xmm_copy_forward(from, to_from, rax); | |
| 1009 } else { | |
| 1010 mmx_copy_forward(from, to_from, rax); | |
| 1011 } | |
| 0 | 1012 } |
| 1013 // copy tailing dword | |
| 1014 __ BIND(L_copy_4_bytes); | |
| 1015 __ testl(count, 1<<shift); | |
| 1016 __ jccb(Assembler::zero, L_copy_2_bytes); | |
| 1017 __ movl(rax, Address(from, 0)); | |
| 1018 __ movl(Address(from, to_from, Address::times_1, 0), rax); | |
| 1019 if (t == T_BYTE || t == T_SHORT) { | |
| 304 | 1020 __ addptr(from, 4); |
| 0 | 1021 __ BIND(L_copy_2_bytes); |
| 1022 // copy tailing word | |
| 1023 __ testl(count, 1<<(shift-1)); | |
| 1024 __ jccb(Assembler::zero, L_copy_byte); | |
| 1025 __ movw(rax, Address(from, 0)); | |
| 1026 __ movw(Address(from, to_from, Address::times_1, 0), rax); | |
| 1027 if (t == T_BYTE) { | |
| 304 | 1028 __ addptr(from, 2); |
| 0 | 1029 __ BIND(L_copy_byte); |
| 1030 // copy tailing byte | |
| 1031 __ testl(count, 1); | |
| 1032 __ jccb(Assembler::zero, L_exit); | |
| 1033 __ movb(rax, Address(from, 0)); | |
| 1034 __ movb(Address(from, to_from, Address::times_1, 0), rax); | |
| 1035 __ BIND(L_exit); | |
| 1036 } else { | |
| 1037 __ BIND(L_copy_byte); | |
| 1038 } | |
| 1039 } else { | |
| 1040 __ BIND(L_copy_2_bytes); | |
| 1041 } | |
| 1042 | |
| 1043 if (t == T_OBJECT) { | |
| 1044 __ movl(count, Address(rsp, 12+12)); // reread 'count' | |
| 304 | 1045 __ mov(to, saved_to); // restore 'to' |
| 0 | 1046 gen_write_ref_array_post_barrier(to, count); |
| 1047 __ BIND(L_0_count); | |
| 1048 } | |
| 1049 inc_copy_counter_np(t); | |
| 304 | 1050 __ pop(rdi); |
| 1051 __ pop(rsi); | |
| 0 | 1052 __ leave(); // required for proper stackwalking of RuntimeStub frame |
| 304 | 1053 __ xorptr(rax, rax); // return 0 |
| 0 | 1054 __ ret(0); |
| 1055 return start; | |
| 1056 } | |
| 1057 | |
| 1058 | |
| 1763 | 1059 address generate_fill(BasicType t, bool aligned, const char *name) { |
| 1060 __ align(CodeEntryAlignment); | |
| 1061 StubCodeMark mark(this, "StubRoutines", name); | |
| 1062 address start = __ pc(); | |
| 1063 | |
| 1064 BLOCK_COMMENT("Entry:"); | |
| 1065 | |
| 1066 const Register to = rdi; // source array address | |
| 1067 const Register value = rdx; // value | |
| 1068 const Register count = rsi; // elements count | |
| 1069 | |
| 1070 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
| 1071 __ push(rsi); | |
| 1072 __ push(rdi); | |
| 1073 __ movptr(to , Address(rsp, 12+ 4)); | |
| 1074 __ movl(value, Address(rsp, 12+ 8)); | |
| 1075 __ movl(count, Address(rsp, 12+ 12)); | |
| 1076 | |
| 1077 __ generate_fill(t, aligned, to, value, count, rax, xmm0); | |
| 1078 | |
| 1079 __ pop(rdi); | |
| 1080 __ pop(rsi); | |
| 1081 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
| 1082 __ ret(0); | |
| 1083 return start; | |
| 1084 } | |
| 1085 | |
| 0 | 1086 address generate_conjoint_copy(BasicType t, bool aligned, |
| 1087 Address::ScaleFactor sf, | |
| 1088 address nooverlap_target, | |
| 2324 | 1089 address* entry, const char *name, |
| 1090 bool dest_uninitialized = false) { | |
| 0 | 1091 __ align(CodeEntryAlignment); |
| 1092 StubCodeMark mark(this, "StubRoutines", name); | |
| 1093 address start = __ pc(); | |
| 1094 | |
| 1095 Label L_0_count, L_exit, L_skip_align1, L_skip_align2, L_copy_byte; | |
| 1096 Label L_copy_2_bytes, L_copy_4_bytes, L_copy_8_bytes, L_copy_8_bytes_loop; | |
| 1097 | |
| 304 | 1098 int shift = Address::times_ptr - sf; |
| 0 | 1099 |
| 1100 const Register src = rax; // source array address | |
| 1101 const Register dst = rdx; // destination array address | |
| 1102 const Register from = rsi; // source array address | |
| 1103 const Register to = rdi; // destination array address | |
| 1104 const Register count = rcx; // elements count | |
| 1105 const Register end = rax; // array end address | |
| 1106 | |
| 1107 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
| 304 | 1108 __ push(rsi); |
| 1109 __ push(rdi); | |
| 1110 __ movptr(src , Address(rsp, 12+ 4)); // from | |
| 1111 __ movptr(dst , Address(rsp, 12+ 8)); // to | |
| 1112 __ movl2ptr(count, Address(rsp, 12+12)); // count | |
| 0 | 1113 |
| 1114 if (entry != NULL) { | |
| 1115 *entry = __ pc(); // Entry point from generic arraycopy stub. | |
| 1116 BLOCK_COMMENT("Entry:"); | |
| 1117 } | |
| 1118 | |
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1119 // nooverlap_target expects arguments in rsi and rdi. |
| 304 | 1120 __ mov(from, src); |
| 1121 __ mov(to , dst); | |
| 0 | 1122 |
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1123 // arrays overlap test: dispatch to disjoint stub if necessary. |
| 0 | 1124 RuntimeAddress nooverlap(nooverlap_target); |
| 304 | 1125 __ cmpptr(dst, src); |
| 1126 __ lea(end, Address(src, count, sf, 0)); // src + count * elem_size | |
| 0 | 1127 __ jump_cc(Assembler::belowEqual, nooverlap); |
| 304 | 1128 __ cmpptr(dst, end); |
| 0 | 1129 __ jump_cc(Assembler::aboveEqual, nooverlap); |
| 1130 | |
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1131 if (t == T_OBJECT) { |
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1132 __ testl(count, count); |
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1133 __ jcc(Assembler::zero, L_0_count); |
| 2324 | 1134 gen_write_ref_array_pre_barrier(dst, count, dest_uninitialized); |
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1135 } |
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1136 |
| 0 | 1137 // copy from high to low |
| 1138 __ cmpl(count, 2<<shift); // Short arrays (< 8 bytes) copy by element | |
| 1139 __ jcc(Assembler::below, L_copy_4_bytes); // use unsigned cmp | |
| 1140 if (t == T_BYTE || t == T_SHORT) { | |
| 1141 // Align the end of destination array at 4 bytes address boundary | |
| 304 | 1142 __ lea(end, Address(dst, count, sf, 0)); |
| 0 | 1143 if (t == T_BYTE) { |
| 1144 // One byte misalignment happens only for byte arrays | |
| 1145 __ testl(end, 1); | |
| 1146 __ jccb(Assembler::zero, L_skip_align1); | |
| 1147 __ decrement(count); | |
| 1148 __ movb(rdx, Address(from, count, sf, 0)); | |
| 1149 __ movb(Address(to, count, sf, 0), rdx); | |
| 1150 __ BIND(L_skip_align1); | |
| 1151 } | |
| 1152 // Two bytes misalignment happens only for byte and short (char) arrays | |
| 1153 __ testl(end, 2); | |
| 1154 __ jccb(Assembler::zero, L_skip_align2); | |
| 304 | 1155 __ subptr(count, 1<<(shift-1)); |
| 0 | 1156 __ movw(rdx, Address(from, count, sf, 0)); |
| 1157 __ movw(Address(to, count, sf, 0), rdx); | |
| 1158 __ BIND(L_skip_align2); | |
| 1159 __ cmpl(count, 2<<shift); // Short arrays (< 8 bytes) copy by element | |
| 1160 __ jcc(Assembler::below, L_copy_4_bytes); | |
| 1161 } | |
| 1162 | |
| 1163 if (!VM_Version::supports_mmx()) { | |
| 1164 __ std(); | |
| 304 | 1165 __ mov(rax, count); // Save 'count' |
| 1166 __ mov(rdx, to); // Save 'to' | |
| 1167 __ lea(rsi, Address(from, count, sf, -4)); | |
| 1168 __ lea(rdi, Address(to , count, sf, -4)); | |
| 1169 __ shrptr(count, shift); // bytes count | |
| 1170 __ rep_mov(); | |
| 0 | 1171 __ cld(); |
| 304 | 1172 __ mov(count, rax); // restore 'count' |
| 0 | 1173 __ andl(count, (1<<shift)-1); // mask the number of rest elements |
| 304 | 1174 __ movptr(from, Address(rsp, 12+4)); // reread 'from' |
| 1175 __ mov(to, rdx); // restore 'to' | |
| 0 | 1176 __ jmpb(L_copy_2_bytes); // all dword were copied |
| 1177 } else { | |
| 1178 // Align to 8 bytes the end of array. It is aligned to 4 bytes already. | |
| 304 | 1179 __ testptr(end, 4); |
| 0 | 1180 __ jccb(Assembler::zero, L_copy_8_bytes); |
| 1181 __ subl(count, 1<<shift); | |
| 1182 __ movl(rdx, Address(from, count, sf, 0)); | |
| 1183 __ movl(Address(to, count, sf, 0), rdx); | |
| 1184 __ jmpb(L_copy_8_bytes); | |
| 1185 | |
| 1365 | 1186 __ align(OptoLoopAlignment); |
| 0 | 1187 // Move 8 bytes |
| 1188 __ BIND(L_copy_8_bytes_loop); | |
| 405 | 1189 if (UseXMMForArrayCopy) { |
| 1190 __ movq(xmm0, Address(from, count, sf, 0)); | |
| 1191 __ movq(Address(to, count, sf, 0), xmm0); | |
| 1192 } else { | |
| 1193 __ movq(mmx0, Address(from, count, sf, 0)); | |
| 1194 __ movq(Address(to, count, sf, 0), mmx0); | |
| 1195 } | |
| 0 | 1196 __ BIND(L_copy_8_bytes); |
| 1197 __ subl(count, 2<<shift); | |
| 1198 __ jcc(Assembler::greaterEqual, L_copy_8_bytes_loop); | |
| 1199 __ addl(count, 2<<shift); | |
| 405 | 1200 if (!UseXMMForArrayCopy) { |
| 1201 __ emms(); | |
| 1202 } | |
| 0 | 1203 } |
| 1204 __ BIND(L_copy_4_bytes); | |
| 1205 // copy prefix qword | |
| 1206 __ testl(count, 1<<shift); | |
| 1207 __ jccb(Assembler::zero, L_copy_2_bytes); | |
| 1208 __ movl(rdx, Address(from, count, sf, -4)); | |
| 1209 __ movl(Address(to, count, sf, -4), rdx); | |
| 1210 | |
| 1211 if (t == T_BYTE || t == T_SHORT) { | |
| 1212 __ subl(count, (1<<shift)); | |
| 1213 __ BIND(L_copy_2_bytes); | |
| 1214 // copy prefix dword | |
| 1215 __ testl(count, 1<<(shift-1)); | |
| 1216 __ jccb(Assembler::zero, L_copy_byte); | |
| 1217 __ movw(rdx, Address(from, count, sf, -2)); | |
| 1218 __ movw(Address(to, count, sf, -2), rdx); | |
| 1219 if (t == T_BYTE) { | |
| 1220 __ subl(count, 1<<(shift-1)); | |
| 1221 __ BIND(L_copy_byte); | |
| 1222 // copy prefix byte | |
| 1223 __ testl(count, 1); | |
| 1224 __ jccb(Assembler::zero, L_exit); | |
| 1225 __ movb(rdx, Address(from, 0)); | |
| 1226 __ movb(Address(to, 0), rdx); | |
| 1227 __ BIND(L_exit); | |
| 1228 } else { | |
| 1229 __ BIND(L_copy_byte); | |
| 1230 } | |
| 1231 } else { | |
| 1232 __ BIND(L_copy_2_bytes); | |
| 1233 } | |
| 1234 if (t == T_OBJECT) { | |
| 304 | 1235 __ movl2ptr(count, Address(rsp, 12+12)); // reread count |
| 0 | 1236 gen_write_ref_array_post_barrier(to, count); |
| 1237 __ BIND(L_0_count); | |
| 1238 } | |
| 1239 inc_copy_counter_np(t); | |
| 304 | 1240 __ pop(rdi); |
| 1241 __ pop(rsi); | |
| 0 | 1242 __ leave(); // required for proper stackwalking of RuntimeStub frame |
| 304 | 1243 __ xorptr(rax, rax); // return 0 |
| 0 | 1244 __ ret(0); |
| 1245 return start; | |
| 1246 } | |
| 1247 | |
| 1248 | |
| 1249 address generate_disjoint_long_copy(address* entry, const char *name) { | |
| 1250 __ align(CodeEntryAlignment); | |
| 1251 StubCodeMark mark(this, "StubRoutines", name); | |
| 1252 address start = __ pc(); | |
| 1253 | |
| 1254 Label L_copy_8_bytes, L_copy_8_bytes_loop; | |
| 1255 const Register from = rax; // source array address | |
| 1256 const Register to = rdx; // destination array address | |
| 1257 const Register count = rcx; // elements count | |
| 1258 const Register to_from = rdx; // (to - from) | |
| 1259 | |
| 1260 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
| 304 | 1261 __ movptr(from , Address(rsp, 8+0)); // from |
| 1262 __ movptr(to , Address(rsp, 8+4)); // to | |
| 1263 __ movl2ptr(count, Address(rsp, 8+8)); // count | |
| 0 | 1264 |
| 1265 *entry = __ pc(); // Entry point from conjoint arraycopy stub. | |
| 1266 BLOCK_COMMENT("Entry:"); | |
| 1267 | |
| 304 | 1268 __ subptr(to, from); // to --> to_from |
| 0 | 1269 if (VM_Version::supports_mmx()) { |
| 405 | 1270 if (UseXMMForArrayCopy) { |
| 1271 xmm_copy_forward(from, to_from, count); | |
| 1272 } else { | |
| 1273 mmx_copy_forward(from, to_from, count); | |
| 1274 } | |
| 0 | 1275 } else { |
| 1276 __ jmpb(L_copy_8_bytes); | |
| 1365 | 1277 __ align(OptoLoopAlignment); |
| 0 | 1278 __ BIND(L_copy_8_bytes_loop); |
| 1279 __ fild_d(Address(from, 0)); | |
| 1280 __ fistp_d(Address(from, to_from, Address::times_1)); | |
| 304 | 1281 __ addptr(from, 8); |
| 0 | 1282 __ BIND(L_copy_8_bytes); |
| 1283 __ decrement(count); | |
| 1284 __ jcc(Assembler::greaterEqual, L_copy_8_bytes_loop); | |
| 1285 } | |
| 1286 inc_copy_counter_np(T_LONG); | |
| 1287 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
| 304 | 1288 __ xorptr(rax, rax); // return 0 |
| 0 | 1289 __ ret(0); |
| 1290 return start; | |
| 1291 } | |
| 1292 | |
| 1293 address generate_conjoint_long_copy(address nooverlap_target, | |
| 1294 address* entry, const char *name) { | |
| 1295 __ align(CodeEntryAlignment); | |
| 1296 StubCodeMark mark(this, "StubRoutines", name); | |
| 1297 address start = __ pc(); | |
| 1298 | |
| 1299 Label L_copy_8_bytes, L_copy_8_bytes_loop; | |
| 1300 const Register from = rax; // source array address | |
| 1301 const Register to = rdx; // destination array address | |
| 1302 const Register count = rcx; // elements count | |
| 1303 const Register end_from = rax; // source array end address | |
| 1304 | |
| 1305 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
| 304 | 1306 __ movptr(from , Address(rsp, 8+0)); // from |
| 1307 __ movptr(to , Address(rsp, 8+4)); // to | |
| 1308 __ movl2ptr(count, Address(rsp, 8+8)); // count | |
| 0 | 1309 |
| 1310 *entry = __ pc(); // Entry point from generic arraycopy stub. | |
| 1311 BLOCK_COMMENT("Entry:"); | |
| 1312 | |
| 1313 // arrays overlap test | |
| 304 | 1314 __ cmpptr(to, from); |
| 0 | 1315 RuntimeAddress nooverlap(nooverlap_target); |
| 1316 __ jump_cc(Assembler::belowEqual, nooverlap); | |
| 304 | 1317 __ lea(end_from, Address(from, count, Address::times_8, 0)); |
| 1318 __ cmpptr(to, end_from); | |
| 1319 __ movptr(from, Address(rsp, 8)); // from | |
| 0 | 1320 __ jump_cc(Assembler::aboveEqual, nooverlap); |
| 1321 | |
| 1322 __ jmpb(L_copy_8_bytes); | |
| 1323 | |
| 1365 | 1324 __ align(OptoLoopAlignment); |
| 0 | 1325 __ BIND(L_copy_8_bytes_loop); |
| 1326 if (VM_Version::supports_mmx()) { | |
| 405 | 1327 if (UseXMMForArrayCopy) { |
| 1328 __ movq(xmm0, Address(from, count, Address::times_8)); | |
| 1329 __ movq(Address(to, count, Address::times_8), xmm0); | |
| 1330 } else { | |
| 1331 __ movq(mmx0, Address(from, count, Address::times_8)); | |
| 1332 __ movq(Address(to, count, Address::times_8), mmx0); | |
| 1333 } | |
| 0 | 1334 } else { |
| 1335 __ fild_d(Address(from, count, Address::times_8)); | |
| 1336 __ fistp_d(Address(to, count, Address::times_8)); | |
| 1337 } | |
| 1338 __ BIND(L_copy_8_bytes); | |
| 1339 __ decrement(count); | |
| 1340 __ jcc(Assembler::greaterEqual, L_copy_8_bytes_loop); | |
| 1341 | |
| 405 | 1342 if (VM_Version::supports_mmx() && !UseXMMForArrayCopy) { |
| 0 | 1343 __ emms(); |
| 1344 } | |
| 1345 inc_copy_counter_np(T_LONG); | |
| 1346 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
| 304 | 1347 __ xorptr(rax, rax); // return 0 |
| 0 | 1348 __ ret(0); |
| 1349 return start; | |
| 1350 } | |
| 1351 | |
| 1352 | |
| 1353 // Helper for generating a dynamic type check. | |
| 1354 // The sub_klass must be one of {rbx, rdx, rsi}. | |
| 1355 // The temp is killed. | |
| 1356 void generate_type_check(Register sub_klass, | |
| 1357 Address& super_check_offset_addr, | |
| 1358 Address& super_klass_addr, | |
| 1359 Register temp, | |
|
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1360 Label* L_success, Label* L_failure) { |
| 0 | 1361 BLOCK_COMMENT("type_check:"); |
| 1362 | |
| 1363 Label L_fallthrough; | |
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1364 #define LOCAL_JCC(assembler_con, label_ptr) \ |
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1365 if (label_ptr != NULL) __ jcc(assembler_con, *(label_ptr)); \ |
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1366 else __ jcc(assembler_con, L_fallthrough) /*omit semi*/ |
| 0 | 1367 |
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1368 // The following is a strange variation of the fast path which requires |
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1369 // one less register, because needed values are on the argument stack. |
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1370 // __ check_klass_subtype_fast_path(sub_klass, *super_klass*, temp, |
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1371 // L_success, L_failure, NULL); |
| 0 | 1372 assert_different_registers(sub_klass, temp); |
| 1373 | |
| 1374 int sc_offset = (klassOopDesc::header_size() * HeapWordSize + | |
| 1375 Klass::secondary_super_cache_offset_in_bytes()); | |
| 1376 | |
| 1377 // if the pointers are equal, we are done (e.g., String[] elements) | |
| 304 | 1378 __ cmpptr(sub_klass, super_klass_addr); |
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1379 LOCAL_JCC(Assembler::equal, L_success); |
| 0 | 1380 |
| 1381 // check the supertype display: | |
| 304 | 1382 __ movl2ptr(temp, super_check_offset_addr); |
| 0 | 1383 Address super_check_addr(sub_klass, temp, Address::times_1, 0); |
| 304 | 1384 __ movptr(temp, super_check_addr); // load displayed supertype |
| 1385 __ cmpptr(temp, super_klass_addr); // test the super type | |
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1386 LOCAL_JCC(Assembler::equal, L_success); |
| 0 | 1387 |
| 1388 // if it was a primary super, we can just fail immediately | |
| 1389 __ cmpl(super_check_offset_addr, sc_offset); | |
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1390 LOCAL_JCC(Assembler::notEqual, L_failure); |
| 0 | 1391 |
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1392 // The repne_scan instruction uses fixed registers, which will get spilled. |
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1393 // We happen to know this works best when super_klass is in rax. |
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1394 Register super_klass = temp; |
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1395 __ movptr(super_klass, super_klass_addr); |
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1396 __ check_klass_subtype_slow_path(sub_klass, super_klass, noreg, noreg, |
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1397 L_success, L_failure); |
| 0 | 1398 |
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1399 __ bind(L_fallthrough); |
| 0 | 1400 |
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1401 if (L_success == NULL) { BLOCK_COMMENT("L_success:"); } |
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1402 if (L_failure == NULL) { BLOCK_COMMENT("L_failure:"); } |
| 0 | 1403 |
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1404 #undef LOCAL_JCC |
| 0 | 1405 } |
| 1406 | |
| 1407 // | |
| 1408 // Generate checkcasting array copy stub | |
| 1409 // | |
| 1410 // Input: | |
| 1411 // 4(rsp) - source array address | |
| 1412 // 8(rsp) - destination array address | |
| 1413 // 12(rsp) - element count, can be zero | |
| 1414 // 16(rsp) - size_t ckoff (super_check_offset) | |
| 1415 // 20(rsp) - oop ckval (super_klass) | |
| 1416 // | |
| 1417 // Output: | |
| 1418 // rax, == 0 - success | |
| 1419 // rax, == -1^K - failure, where K is partial transfer count | |
| 1420 // | |
| 2324 | 1421 address generate_checkcast_copy(const char *name, address* entry, bool dest_uninitialized = false) { |
| 0 | 1422 __ align(CodeEntryAlignment); |
| 1423 StubCodeMark mark(this, "StubRoutines", name); | |
| 1424 address start = __ pc(); | |
| 1425 | |
| 1426 Label L_load_element, L_store_element, L_do_card_marks, L_done; | |
| 1427 | |
| 1428 // register use: | |
| 1429 // rax, rdx, rcx -- loop control (end_from, end_to, count) | |
| 1430 // rdi, rsi -- element access (oop, klass) | |
| 1431 // rbx, -- temp | |
| 1432 const Register from = rax; // source array address | |
| 1433 const Register to = rdx; // destination array address | |
| 1434 const Register length = rcx; // elements count | |
| 1435 const Register elem = rdi; // each oop copied | |
| 1436 const Register elem_klass = rsi; // each elem._klass (sub_klass) | |
| 1437 const Register temp = rbx; // lone remaining temp | |
| 1438 | |
| 1439 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
| 1440 | |
| 304 | 1441 __ push(rsi); |
| 1442 __ push(rdi); | |
| 1443 __ push(rbx); | |
| 0 | 1444 |
| 1445 Address from_arg(rsp, 16+ 4); // from | |
| 1446 Address to_arg(rsp, 16+ 8); // to | |
| 1447 Address length_arg(rsp, 16+12); // elements count | |
| 1448 Address ckoff_arg(rsp, 16+16); // super_check_offset | |
| 1449 Address ckval_arg(rsp, 16+20); // super_klass | |
| 1450 | |
| 1451 // Load up: | |
| 304 | 1452 __ movptr(from, from_arg); |
| 1453 __ movptr(to, to_arg); | |
| 1454 __ movl2ptr(length, length_arg); | |
| 0 | 1455 |
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1456 if (entry != NULL) { |
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1457 *entry = __ pc(); // Entry point from generic arraycopy stub. |
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1458 BLOCK_COMMENT("Entry:"); |
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1459 } |
| 0 | 1460 |
| 1461 //--------------------------------------------------------------- | |
| 1462 // Assembler stub will be used for this call to arraycopy | |
| 1463 // if the two arrays are subtypes of Object[] but the | |
| 1464 // destination array type is not equal to or a supertype | |
| 1465 // of the source type. Each element must be separately | |
| 1466 // checked. | |
| 1467 | |
| 1468 // Loop-invariant addresses. They are exclusive end pointers. | |
| 304 | 1469 Address end_from_addr(from, length, Address::times_ptr, 0); |
| 1470 Address end_to_addr(to, length, Address::times_ptr, 0); | |
| 0 | 1471 |
| 1472 Register end_from = from; // re-use | |
| 1473 Register end_to = to; // re-use | |
| 1474 Register count = length; // re-use | |
| 1475 | |
| 1476 // Loop-variant addresses. They assume post-incremented count < 0. | |
| 304 | 1477 Address from_element_addr(end_from, count, Address::times_ptr, 0); |
| 1478 Address to_element_addr(end_to, count, Address::times_ptr, 0); | |
| 0 | 1479 Address elem_klass_addr(elem, oopDesc::klass_offset_in_bytes()); |
| 1480 | |
| 1481 // Copy from low to high addresses, indexed from the end of each array. | |
| 2324 | 1482 gen_write_ref_array_pre_barrier(to, count, dest_uninitialized); |
| 304 | 1483 __ lea(end_from, end_from_addr); |
| 1484 __ lea(end_to, end_to_addr); | |
| 0 | 1485 assert(length == count, ""); // else fix next line: |
| 304 | 1486 __ negptr(count); // negate and test the length |
| 0 | 1487 __ jccb(Assembler::notZero, L_load_element); |
| 1488 | |
| 1489 // Empty array: Nothing to do. | |
| 304 | 1490 __ xorptr(rax, rax); // return 0 on (trivial) success |
| 0 | 1491 __ jmp(L_done); |
| 1492 | |
| 1493 // ======== begin loop ======== | |
| 1494 // (Loop is rotated; its entry is L_load_element.) | |
| 1495 // Loop control: | |
| 1496 // for (count = -count; count != 0; count++) | |
| 1497 // Base pointers src, dst are biased by 8*count,to last element. | |
| 1365 | 1498 __ align(OptoLoopAlignment); |
| 0 | 1499 |
| 1500 __ BIND(L_store_element); | |
| 304 | 1501 __ movptr(to_element_addr, elem); // store the oop |
| 0 | 1502 __ increment(count); // increment the count toward zero |
| 1503 __ jccb(Assembler::zero, L_do_card_marks); | |
| 1504 | |
| 1505 // ======== loop entry is here ======== | |
| 1506 __ BIND(L_load_element); | |
| 304 | 1507 __ movptr(elem, from_element_addr); // load the oop |
| 1508 __ testptr(elem, elem); | |
| 0 | 1509 __ jccb(Assembler::zero, L_store_element); |
| 1510 | |
| 1511 // (Could do a trick here: Remember last successful non-null | |
| 1512 // element stored and make a quick oop equality check on it.) | |
| 1513 | |
| 304 | 1514 __ movptr(elem_klass, elem_klass_addr); // query the object klass |
| 0 | 1515 generate_type_check(elem_klass, ckoff_arg, ckval_arg, temp, |
| 1516 &L_store_element, NULL); | |
| 1517 // (On fall-through, we have failed the element type check.) | |
| 1518 // ======== end loop ======== | |
| 1519 | |
| 1520 // It was a real error; we must depend on the caller to finish the job. | |
|
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1521 // Register "count" = -1 * number of *remaining* oops, length_arg = *total* oops. |
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1522 // Emit GC store barriers for the oops we have copied (length_arg + count), |
| 0 | 1523 // and report their number to the caller. |
| 1524 __ addl(count, length_arg); // transfers = (length - remaining) | |
| 304 | 1525 __ movl2ptr(rax, count); // save the value |
| 1526 __ notptr(rax); // report (-1^K) to caller | |
| 1527 __ movptr(to, to_arg); // reload | |
| 0 | 1528 assert_different_registers(to, count, rax); |
| 1529 gen_write_ref_array_post_barrier(to, count); | |
| 1530 __ jmpb(L_done); | |
| 1531 | |
| 1532 // Come here on success only. | |
| 1533 __ BIND(L_do_card_marks); | |
| 304 | 1534 __ movl2ptr(count, length_arg); |
| 1535 __ movptr(to, to_arg); // reload | |
| 0 | 1536 gen_write_ref_array_post_barrier(to, count); |
| 304 | 1537 __ xorptr(rax, rax); // return 0 on success |
| 0 | 1538 |
| 1539 // Common exit point (success or failure). | |
| 1540 __ BIND(L_done); | |
| 304 | 1541 __ pop(rbx); |
| 1542 __ pop(rdi); | |
| 1543 __ pop(rsi); | |
| 0 | 1544 inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr); |
| 1545 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
| 1546 __ ret(0); | |
| 1547 | |
| 1548 return start; | |
| 1549 } | |
| 1550 | |
| 1551 // | |
| 1552 // Generate 'unsafe' array copy stub | |
| 1553 // Though just as safe as the other stubs, it takes an unscaled | |
| 1554 // size_t argument instead of an element count. | |
| 1555 // | |
| 1556 // Input: | |
| 1557 // 4(rsp) - source array address | |
| 1558 // 8(rsp) - destination array address | |
| 1559 // 12(rsp) - byte count, can be zero | |
| 1560 // | |
| 1561 // Output: | |
| 1562 // rax, == 0 - success | |
| 1563 // rax, == -1 - need to call System.arraycopy | |
| 1564 // | |
| 1565 // Examines the alignment of the operands and dispatches | |
| 1566 // to a long, int, short, or byte copy loop. | |
| 1567 // | |
| 1568 address generate_unsafe_copy(const char *name, | |
| 1569 address byte_copy_entry, | |
| 1570 address short_copy_entry, | |
| 1571 address int_copy_entry, | |
| 1572 address long_copy_entry) { | |
| 1573 | |
| 1574 Label L_long_aligned, L_int_aligned, L_short_aligned; | |
| 1575 | |
| 1576 __ align(CodeEntryAlignment); | |
| 1577 StubCodeMark mark(this, "StubRoutines", name); | |
| 1578 address start = __ pc(); | |
| 1579 | |
| 1580 const Register from = rax; // source array address | |
| 1581 const Register to = rdx; // destination array address | |
| 1582 const Register count = rcx; // elements count | |
| 1583 | |
| 1584 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
| 304 | 1585 __ push(rsi); |
| 1586 __ push(rdi); | |
| 0 | 1587 Address from_arg(rsp, 12+ 4); // from |
| 1588 Address to_arg(rsp, 12+ 8); // to | |
| 1589 Address count_arg(rsp, 12+12); // byte count | |
| 1590 | |
| 1591 // Load up: | |
| 304 | 1592 __ movptr(from , from_arg); |
| 1593 __ movptr(to , to_arg); | |
| 1594 __ movl2ptr(count, count_arg); | |
| 0 | 1595 |
| 1596 // bump this on entry, not on exit: | |
| 1597 inc_counter_np(SharedRuntime::_unsafe_array_copy_ctr); | |
| 1598 | |
| 1599 const Register bits = rsi; | |
| 304 | 1600 __ mov(bits, from); |
| 1601 __ orptr(bits, to); | |
| 1602 __ orptr(bits, count); | |
| 0 | 1603 |
| 1604 __ testl(bits, BytesPerLong-1); | |
| 1605 __ jccb(Assembler::zero, L_long_aligned); | |
| 1606 | |
| 1607 __ testl(bits, BytesPerInt-1); | |
| 1608 __ jccb(Assembler::zero, L_int_aligned); | |
| 1609 | |
| 1610 __ testl(bits, BytesPerShort-1); | |
| 1611 __ jump_cc(Assembler::notZero, RuntimeAddress(byte_copy_entry)); | |
| 1612 | |
| 1613 __ BIND(L_short_aligned); | |
| 304 | 1614 __ shrptr(count, LogBytesPerShort); // size => short_count |
| 0 | 1615 __ movl(count_arg, count); // update 'count' |
| 1616 __ jump(RuntimeAddress(short_copy_entry)); | |
| 1617 | |
| 1618 __ BIND(L_int_aligned); | |
| 304 | 1619 __ shrptr(count, LogBytesPerInt); // size => int_count |
| 0 | 1620 __ movl(count_arg, count); // update 'count' |
| 1621 __ jump(RuntimeAddress(int_copy_entry)); | |
| 1622 | |
| 1623 __ BIND(L_long_aligned); | |
| 304 | 1624 __ shrptr(count, LogBytesPerLong); // size => qword_count |
| 0 | 1625 __ movl(count_arg, count); // update 'count' |
| 304 | 1626 __ pop(rdi); // Do pops here since jlong_arraycopy stub does not do it. |
| 1627 __ pop(rsi); | |
| 0 | 1628 __ jump(RuntimeAddress(long_copy_entry)); |
| 1629 | |
| 1630 return start; | |
| 1631 } | |
| 1632 | |
| 1633 | |
| 1634 // Perform range checks on the proposed arraycopy. | |
| 1635 // Smashes src_pos and dst_pos. (Uses them up for temps.) | |
| 1636 void arraycopy_range_checks(Register src, | |
| 1637 Register src_pos, | |
| 1638 Register dst, | |
| 1639 Register dst_pos, | |
| 1640 Address& length, | |
| 1641 Label& L_failed) { | |
| 1642 BLOCK_COMMENT("arraycopy_range_checks:"); | |
| 1643 const Register src_end = src_pos; // source array end position | |
| 1644 const Register dst_end = dst_pos; // destination array end position | |
| 1645 __ addl(src_end, length); // src_pos + length | |
| 1646 __ addl(dst_end, length); // dst_pos + length | |
| 1647 | |
| 1648 // if (src_pos + length > arrayOop(src)->length() ) FAIL; | |
| 1649 __ cmpl(src_end, Address(src, arrayOopDesc::length_offset_in_bytes())); | |
| 1650 __ jcc(Assembler::above, L_failed); | |
| 1651 | |
| 1652 // if (dst_pos + length > arrayOop(dst)->length() ) FAIL; | |
| 1653 __ cmpl(dst_end, Address(dst, arrayOopDesc::length_offset_in_bytes())); | |
| 1654 __ jcc(Assembler::above, L_failed); | |
| 1655 | |
| 1656 BLOCK_COMMENT("arraycopy_range_checks done"); | |
| 1657 } | |
| 1658 | |
| 1659 | |
| 1660 // | |
| 1661 // Generate generic array copy stubs | |
| 1662 // | |
| 1663 // Input: | |
| 1664 // 4(rsp) - src oop | |
| 1665 // 8(rsp) - src_pos | |
| 1666 // 12(rsp) - dst oop | |
| 1667 // 16(rsp) - dst_pos | |
| 1668 // 20(rsp) - element count | |
| 1669 // | |
| 1670 // Output: | |
| 1671 // rax, == 0 - success | |
| 1672 // rax, == -1^K - failure, where K is partial transfer count | |
| 1673 // | |
| 1674 address generate_generic_copy(const char *name, | |
| 1675 address entry_jbyte_arraycopy, | |
| 1676 address entry_jshort_arraycopy, | |
| 1677 address entry_jint_arraycopy, | |
| 1678 address entry_oop_arraycopy, | |
| 1679 address entry_jlong_arraycopy, | |
| 1680 address entry_checkcast_arraycopy) { | |
| 1681 Label L_failed, L_failed_0, L_objArray; | |
| 1682 | |
| 1683 { int modulus = CodeEntryAlignment; | |
| 1684 int target = modulus - 5; // 5 = sizeof jmp(L_failed) | |
| 1685 int advance = target - (__ offset() % modulus); | |
| 1686 if (advance < 0) advance += modulus; | |
| 1687 if (advance > 0) __ nop(advance); | |
| 1688 } | |
| 1689 StubCodeMark mark(this, "StubRoutines", name); | |
| 1690 | |
| 1691 // Short-hop target to L_failed. Makes for denser prologue code. | |
| 1692 __ BIND(L_failed_0); | |
| 1693 __ jmp(L_failed); | |
| 1694 assert(__ offset() % CodeEntryAlignment == 0, "no further alignment needed"); | |
| 1695 | |
| 1696 __ align(CodeEntryAlignment); | |
| 1697 address start = __ pc(); | |
| 1698 | |
| 1699 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
| 304 | 1700 __ push(rsi); |
| 1701 __ push(rdi); | |
| 0 | 1702 |
| 1703 // bump this on entry, not on exit: | |
| 1704 inc_counter_np(SharedRuntime::_generic_array_copy_ctr); | |
| 1705 | |
| 1706 // Input values | |
| 1707 Address SRC (rsp, 12+ 4); | |
| 1708 Address SRC_POS (rsp, 12+ 8); | |
| 1709 Address DST (rsp, 12+12); | |
| 1710 Address DST_POS (rsp, 12+16); | |
| 1711 Address LENGTH (rsp, 12+20); | |
| 1712 | |
| 1713 //----------------------------------------------------------------------- | |
| 1714 // Assembler stub will be used for this call to arraycopy | |
| 1715 // if the following conditions are met: | |
| 1716 // | |
| 1717 // (1) src and dst must not be null. | |
| 1718 // (2) src_pos must not be negative. | |
| 1719 // (3) dst_pos must not be negative. | |
| 1720 // (4) length must not be negative. | |
| 1721 // (5) src klass and dst klass should be the same and not NULL. | |
| 1722 // (6) src and dst should be arrays. | |
| 1723 // (7) src_pos + length must not exceed length of src. | |
| 1724 // (8) dst_pos + length must not exceed length of dst. | |
| 1725 // | |
| 1726 | |
| 1727 const Register src = rax; // source array oop | |
| 1728 const Register src_pos = rsi; | |
| 1729 const Register dst = rdx; // destination array oop | |
| 1730 const Register dst_pos = rdi; | |
| 1731 const Register length = rcx; // transfer count | |
| 1732 | |
| 1733 // if (src == NULL) return -1; | |
| 304 | 1734 __ movptr(src, SRC); // src oop |
| 1735 __ testptr(src, src); | |
| 0 | 1736 __ jccb(Assembler::zero, L_failed_0); |
| 1737 | |
| 1738 // if (src_pos < 0) return -1; | |
| 304 | 1739 __ movl2ptr(src_pos, SRC_POS); // src_pos |
| 0 | 1740 __ testl(src_pos, src_pos); |
| 1741 __ jccb(Assembler::negative, L_failed_0); | |
| 1742 | |
| 1743 // if (dst == NULL) return -1; | |
| 304 | 1744 __ movptr(dst, DST); // dst oop |
| 1745 __ testptr(dst, dst); | |
| 0 | 1746 __ jccb(Assembler::zero, L_failed_0); |
| 1747 | |
| 1748 // if (dst_pos < 0) return -1; | |
| 304 | 1749 __ movl2ptr(dst_pos, DST_POS); // dst_pos |
| 0 | 1750 __ testl(dst_pos, dst_pos); |
| 1751 __ jccb(Assembler::negative, L_failed_0); | |
| 1752 | |
| 1753 // if (length < 0) return -1; | |
| 304 | 1754 __ movl2ptr(length, LENGTH); // length |
| 0 | 1755 __ testl(length, length); |
| 1756 __ jccb(Assembler::negative, L_failed_0); | |
| 1757 | |
| 1758 // if (src->klass() == NULL) return -1; | |
| 1759 Address src_klass_addr(src, oopDesc::klass_offset_in_bytes()); | |
| 1760 Address dst_klass_addr(dst, oopDesc::klass_offset_in_bytes()); | |
| 1761 const Register rcx_src_klass = rcx; // array klass | |
| 304 | 1762 __ movptr(rcx_src_klass, Address(src, oopDesc::klass_offset_in_bytes())); |
| 0 | 1763 |
| 1764 #ifdef ASSERT | |
| 1765 // assert(src->klass() != NULL); | |
| 1766 BLOCK_COMMENT("assert klasses not null"); | |
| 1767 { Label L1, L2; | |
| 304 | 1768 __ testptr(rcx_src_klass, rcx_src_klass); |
| 0 | 1769 __ jccb(Assembler::notZero, L2); // it is broken if klass is NULL |
| 1770 __ bind(L1); | |
| 1771 __ stop("broken null klass"); | |
| 1772 __ bind(L2); | |
| 304 | 1773 __ cmpptr(dst_klass_addr, (int32_t)NULL_WORD); |
| 0 | 1774 __ jccb(Assembler::equal, L1); // this would be broken also |
| 1775 BLOCK_COMMENT("assert done"); | |
| 1776 } | |
| 1777 #endif //ASSERT | |
| 1778 | |
| 1779 // Load layout helper (32-bits) | |
| 1780 // | |
| 1781 // |array_tag| | header_size | element_type | |log2_element_size| | |
| 1782 // 32 30 24 16 8 2 0 | |
| 1783 // | |
| 1784 // array_tag: typeArray = 0x3, objArray = 0x2, non-array = 0x0 | |
| 1785 // | |
| 1786 | |
| 1787 int lh_offset = klassOopDesc::header_size() * HeapWordSize + | |
| 1788 Klass::layout_helper_offset_in_bytes(); | |
| 1789 Address src_klass_lh_addr(rcx_src_klass, lh_offset); | |
| 1790 | |
| 1791 // Handle objArrays completely differently... | |
| 1792 jint objArray_lh = Klass::array_layout_helper(T_OBJECT); | |
| 1793 __ cmpl(src_klass_lh_addr, objArray_lh); | |
| 1794 __ jcc(Assembler::equal, L_objArray); | |
| 1795 | |
| 1796 // if (src->klass() != dst->klass()) return -1; | |
| 304 | 1797 __ cmpptr(rcx_src_klass, dst_klass_addr); |
| 0 | 1798 __ jccb(Assembler::notEqual, L_failed_0); |
| 1799 | |
| 1800 const Register rcx_lh = rcx; // layout helper | |
| 1801 assert(rcx_lh == rcx_src_klass, "known alias"); | |
| 1802 __ movl(rcx_lh, src_klass_lh_addr); | |
| 1803 | |
| 1804 // if (!src->is_Array()) return -1; | |
| 1805 __ cmpl(rcx_lh, Klass::_lh_neutral_value); | |
| 1806 __ jcc(Assembler::greaterEqual, L_failed_0); // signed cmp | |
| 1807 | |
| 1808 // At this point, it is known to be a typeArray (array_tag 0x3). | |
| 1809 #ifdef ASSERT | |
| 1810 { Label L; | |
| 1811 __ cmpl(rcx_lh, (Klass::_lh_array_tag_type_value << Klass::_lh_array_tag_shift)); | |
| 1812 __ jcc(Assembler::greaterEqual, L); // signed cmp | |
| 1813 __ stop("must be a primitive array"); | |
| 1814 __ bind(L); | |
| 1815 } | |
| 1816 #endif | |
| 1817 | |
| 1818 assert_different_registers(src, src_pos, dst, dst_pos, rcx_lh); | |
| 1819 arraycopy_range_checks(src, src_pos, dst, dst_pos, LENGTH, L_failed); | |
| 1820 | |
| 1821 // typeArrayKlass | |
| 1822 // | |
| 1823 // src_addr = (src + array_header_in_bytes()) + (src_pos << log2elemsize); | |
| 1824 // dst_addr = (dst + array_header_in_bytes()) + (dst_pos << log2elemsize); | |
| 1825 // | |
| 1826 const Register rsi_offset = rsi; // array offset | |
| 1827 const Register src_array = src; // src array offset | |
| 1828 const Register dst_array = dst; // dst array offset | |
| 1829 const Register rdi_elsize = rdi; // log2 element size | |
| 1830 | |
| 304 | 1831 __ mov(rsi_offset, rcx_lh); |
| 1832 __ shrptr(rsi_offset, Klass::_lh_header_size_shift); | |
| 1833 __ andptr(rsi_offset, Klass::_lh_header_size_mask); // array_offset | |
| 1834 __ addptr(src_array, rsi_offset); // src array offset | |
| 1835 __ addptr(dst_array, rsi_offset); // dst array offset | |
| 1836 __ andptr(rcx_lh, Klass::_lh_log2_element_size_mask); // log2 elsize | |
| 0 | 1837 |
| 1838 // next registers should be set before the jump to corresponding stub | |
| 1839 const Register from = src; // source array address | |
| 1840 const Register to = dst; // destination array address | |
| 1841 const Register count = rcx; // elements count | |
| 1842 // some of them should be duplicated on stack | |
| 1843 #define FROM Address(rsp, 12+ 4) | |
| 1844 #define TO Address(rsp, 12+ 8) // Not used now | |
| 1845 #define COUNT Address(rsp, 12+12) // Only for oop arraycopy | |
| 1846 | |
| 1847 BLOCK_COMMENT("scale indexes to element size"); | |
| 304 | 1848 __ movl2ptr(rsi, SRC_POS); // src_pos |
| 1849 __ shlptr(rsi); // src_pos << rcx (log2 elsize) | |
| 0 | 1850 assert(src_array == from, ""); |
| 304 | 1851 __ addptr(from, rsi); // from = src_array + SRC_POS << log2 elsize |
| 1852 __ movl2ptr(rdi, DST_POS); // dst_pos | |
| 1853 __ shlptr(rdi); // dst_pos << rcx (log2 elsize) | |
| 0 | 1854 assert(dst_array == to, ""); |
| 304 | 1855 __ addptr(to, rdi); // to = dst_array + DST_POS << log2 elsize |
| 1856 __ movptr(FROM, from); // src_addr | |
| 1857 __ mov(rdi_elsize, rcx_lh); // log2 elsize | |
| 1858 __ movl2ptr(count, LENGTH); // elements count | |
| 0 | 1859 |
| 1860 BLOCK_COMMENT("choose copy loop based on element size"); | |
| 1861 __ cmpl(rdi_elsize, 0); | |
| 1862 | |
| 1863 __ jump_cc(Assembler::equal, RuntimeAddress(entry_jbyte_arraycopy)); | |
| 1864 __ cmpl(rdi_elsize, LogBytesPerShort); | |
| 1865 __ jump_cc(Assembler::equal, RuntimeAddress(entry_jshort_arraycopy)); | |
| 1866 __ cmpl(rdi_elsize, LogBytesPerInt); | |
| 1867 __ jump_cc(Assembler::equal, RuntimeAddress(entry_jint_arraycopy)); | |
| 1868 #ifdef ASSERT | |
| 1869 __ cmpl(rdi_elsize, LogBytesPerLong); | |
| 1870 __ jccb(Assembler::notEqual, L_failed); | |
| 1871 #endif | |
| 304 | 1872 __ pop(rdi); // Do pops here since jlong_arraycopy stub does not do it. |
| 1873 __ pop(rsi); | |
| 0 | 1874 __ jump(RuntimeAddress(entry_jlong_arraycopy)); |
| 1875 | |
| 1876 __ BIND(L_failed); | |
| 304 | 1877 __ xorptr(rax, rax); |
| 1878 __ notptr(rax); // return -1 | |
| 1879 __ pop(rdi); | |
| 1880 __ pop(rsi); | |
| 0 | 1881 __ leave(); // required for proper stackwalking of RuntimeStub frame |
| 1882 __ ret(0); | |
| 1883 | |
| 1884 // objArrayKlass | |
| 1885 __ BIND(L_objArray); | |
| 1886 // live at this point: rcx_src_klass, src[_pos], dst[_pos] | |
| 1887 | |
| 1888 Label L_plain_copy, L_checkcast_copy; | |
| 1889 // test array classes for subtyping | |
| 304 | 1890 __ cmpptr(rcx_src_klass, dst_klass_addr); // usual case is exact equality |
| 0 | 1891 __ jccb(Assembler::notEqual, L_checkcast_copy); |
| 1892 | |
| 1893 // Identically typed arrays can be copied without element-wise checks. | |
| 1894 assert_different_registers(src, src_pos, dst, dst_pos, rcx_src_klass); | |
| 1895 arraycopy_range_checks(src, src_pos, dst, dst_pos, LENGTH, L_failed); | |
| 1896 | |
| 1897 __ BIND(L_plain_copy); | |
| 304 | 1898 __ movl2ptr(count, LENGTH); // elements count |
| 1899 __ movl2ptr(src_pos, SRC_POS); // reload src_pos | |
| 1900 __ lea(from, Address(src, src_pos, Address::times_ptr, | |
| 1901 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); // src_addr | |
| 1902 __ movl2ptr(dst_pos, DST_POS); // reload dst_pos | |
| 1903 __ lea(to, Address(dst, dst_pos, Address::times_ptr, | |
| 1904 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); // dst_addr | |
| 1905 __ movptr(FROM, from); // src_addr | |
| 1906 __ movptr(TO, to); // dst_addr | |
| 0 | 1907 __ movl(COUNT, count); // count |
| 1908 __ jump(RuntimeAddress(entry_oop_arraycopy)); | |
| 1909 | |
| 1910 __ BIND(L_checkcast_copy); | |
| 1911 // live at this point: rcx_src_klass, dst[_pos], src[_pos] | |
| 1912 { | |
| 1913 // Handy offsets: | |
| 1914 int ek_offset = (klassOopDesc::header_size() * HeapWordSize + | |
| 1915 objArrayKlass::element_klass_offset_in_bytes()); | |
| 1916 int sco_offset = (klassOopDesc::header_size() * HeapWordSize + | |
| 1917 Klass::super_check_offset_offset_in_bytes()); | |
| 1918 | |
| 1919 Register rsi_dst_klass = rsi; | |
| 1920 Register rdi_temp = rdi; | |
| 1921 assert(rsi_dst_klass == src_pos, "expected alias w/ src_pos"); | |
| 1922 assert(rdi_temp == dst_pos, "expected alias w/ dst_pos"); | |
| 1923 Address dst_klass_lh_addr(rsi_dst_klass, lh_offset); | |
| 1924 | |
| 1925 // Before looking at dst.length, make sure dst is also an objArray. | |
| 304 | 1926 __ movptr(rsi_dst_klass, dst_klass_addr); |
| 0 | 1927 __ cmpl(dst_klass_lh_addr, objArray_lh); |
| 1928 __ jccb(Assembler::notEqual, L_failed); | |
| 1929 | |
| 1930 // It is safe to examine both src.length and dst.length. | |
| 304 | 1931 __ movl2ptr(src_pos, SRC_POS); // reload rsi |
| 0 | 1932 arraycopy_range_checks(src, src_pos, dst, dst_pos, LENGTH, L_failed); |
| 1933 // (Now src_pos and dst_pos are killed, but not src and dst.) | |
| 1934 | |
| 1935 // We'll need this temp (don't forget to pop it after the type check). | |
| 304 | 1936 __ push(rbx); |
| 0 | 1937 Register rbx_src_klass = rbx; |
| 1938 | |
| 304 | 1939 __ mov(rbx_src_klass, rcx_src_klass); // spill away from rcx |
| 1940 __ movptr(rsi_dst_klass, dst_klass_addr); | |
| 0 | 1941 Address super_check_offset_addr(rsi_dst_klass, sco_offset); |
| 1942 Label L_fail_array_check; | |
| 1943 generate_type_check(rbx_src_klass, | |
| 1944 super_check_offset_addr, dst_klass_addr, | |
| 1945 rdi_temp, NULL, &L_fail_array_check); | |
| 1946 // (On fall-through, we have passed the array type check.) | |
| 304 | 1947 __ pop(rbx); |
| 0 | 1948 __ jmp(L_plain_copy); |
| 1949 | |
| 1950 __ BIND(L_fail_array_check); | |
| 1951 // Reshuffle arguments so we can call checkcast_arraycopy: | |
| 1952 | |
| 1953 // match initial saves for checkcast_arraycopy | |
| 304 | 1954 // push(rsi); // already done; see above |
| 1955 // push(rdi); // already done; see above | |
| 1956 // push(rbx); // already done; see above | |
| 0 | 1957 |
| 1958 // Marshal outgoing arguments now, freeing registers. | |
| 1959 Address from_arg(rsp, 16+ 4); // from | |
| 1960 Address to_arg(rsp, 16+ 8); // to | |
| 1961 Address length_arg(rsp, 16+12); // elements count | |
| 1962 Address ckoff_arg(rsp, 16+16); // super_check_offset | |
| 1963 Address ckval_arg(rsp, 16+20); // super_klass | |
| 1964 | |
| 1965 Address SRC_POS_arg(rsp, 16+ 8); | |
| 1966 Address DST_POS_arg(rsp, 16+16); | |
| 1967 Address LENGTH_arg(rsp, 16+20); | |
| 1968 // push rbx, changed the incoming offsets (why not just use rbp,??) | |
| 1969 // assert(SRC_POS_arg.disp() == SRC_POS.disp() + 4, ""); | |
| 1970 | |
| 304 | 1971 __ movptr(rbx, Address(rsi_dst_klass, ek_offset)); |
| 1972 __ movl2ptr(length, LENGTH_arg); // reload elements count | |
| 1973 __ movl2ptr(src_pos, SRC_POS_arg); // reload src_pos | |
| 1974 __ movl2ptr(dst_pos, DST_POS_arg); // reload dst_pos | |
| 0 | 1975 |
| 304 | 1976 __ movptr(ckval_arg, rbx); // destination element type |
| 0 | 1977 __ movl(rbx, Address(rbx, sco_offset)); |
| 1978 __ movl(ckoff_arg, rbx); // corresponding class check offset | |
| 1979 | |
| 1980 __ movl(length_arg, length); // outgoing length argument | |
| 1981 | |
| 304 | 1982 __ lea(from, Address(src, src_pos, Address::times_ptr, |
| 0 | 1983 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); |
| 304 | 1984 __ movptr(from_arg, from); |
| 0 | 1985 |
| 304 | 1986 __ lea(to, Address(dst, dst_pos, Address::times_ptr, |
| 0 | 1987 arrayOopDesc::base_offset_in_bytes(T_OBJECT))); |
| 304 | 1988 __ movptr(to_arg, to); |
| 0 | 1989 __ jump(RuntimeAddress(entry_checkcast_arraycopy)); |
| 1990 } | |
| 1991 | |
| 1992 return start; | |
| 1993 } | |
| 1994 | |
| 1995 void generate_arraycopy_stubs() { | |
| 1996 address entry; | |
| 1997 address entry_jbyte_arraycopy; | |
| 1998 address entry_jshort_arraycopy; | |
| 1999 address entry_jint_arraycopy; | |
| 2000 address entry_oop_arraycopy; | |
| 2001 address entry_jlong_arraycopy; | |
| 2002 address entry_checkcast_arraycopy; | |
| 2003 | |
| 2004 StubRoutines::_arrayof_jbyte_disjoint_arraycopy = | |
| 2005 generate_disjoint_copy(T_BYTE, true, Address::times_1, &entry, | |
| 2006 "arrayof_jbyte_disjoint_arraycopy"); | |
| 2007 StubRoutines::_arrayof_jbyte_arraycopy = | |
| 2008 generate_conjoint_copy(T_BYTE, true, Address::times_1, entry, | |
| 2009 NULL, "arrayof_jbyte_arraycopy"); | |
| 2010 StubRoutines::_jbyte_disjoint_arraycopy = | |
| 2011 generate_disjoint_copy(T_BYTE, false, Address::times_1, &entry, | |
| 2012 "jbyte_disjoint_arraycopy"); | |
| 2013 StubRoutines::_jbyte_arraycopy = | |
| 2014 generate_conjoint_copy(T_BYTE, false, Address::times_1, entry, | |
| 2015 &entry_jbyte_arraycopy, "jbyte_arraycopy"); | |
| 2016 | |
| 2017 StubRoutines::_arrayof_jshort_disjoint_arraycopy = | |
| 2018 generate_disjoint_copy(T_SHORT, true, Address::times_2, &entry, | |
| 2019 "arrayof_jshort_disjoint_arraycopy"); | |
| 2020 StubRoutines::_arrayof_jshort_arraycopy = | |
| 2021 generate_conjoint_copy(T_SHORT, true, Address::times_2, entry, | |
| 2022 NULL, "arrayof_jshort_arraycopy"); | |
| 2023 StubRoutines::_jshort_disjoint_arraycopy = | |
| 2024 generate_disjoint_copy(T_SHORT, false, Address::times_2, &entry, | |
| 2025 "jshort_disjoint_arraycopy"); | |
| 2026 StubRoutines::_jshort_arraycopy = | |
| 2027 generate_conjoint_copy(T_SHORT, false, Address::times_2, entry, | |
| 2028 &entry_jshort_arraycopy, "jshort_arraycopy"); | |
| 2029 | |
| 2030 // Next arrays are always aligned on 4 bytes at least. | |
| 2031 StubRoutines::_jint_disjoint_arraycopy = | |
| 2032 generate_disjoint_copy(T_INT, true, Address::times_4, &entry, | |
| 2033 "jint_disjoint_arraycopy"); | |
| 2034 StubRoutines::_jint_arraycopy = | |
| 2035 generate_conjoint_copy(T_INT, true, Address::times_4, entry, | |
| 2036 &entry_jint_arraycopy, "jint_arraycopy"); | |
| 2037 | |
| 2038 StubRoutines::_oop_disjoint_arraycopy = | |
| 304 | 2039 generate_disjoint_copy(T_OBJECT, true, Address::times_ptr, &entry, |
| 0 | 2040 "oop_disjoint_arraycopy"); |
| 2041 StubRoutines::_oop_arraycopy = | |
| 304 | 2042 generate_conjoint_copy(T_OBJECT, true, Address::times_ptr, entry, |
| 0 | 2043 &entry_oop_arraycopy, "oop_arraycopy"); |
| 2044 | |
| 2324 | 2045 StubRoutines::_oop_disjoint_arraycopy_uninit = |
| 2046 generate_disjoint_copy(T_OBJECT, true, Address::times_ptr, &entry, | |
| 2047 "oop_disjoint_arraycopy_uninit", | |
| 2048 /*dest_uninitialized*/true); | |
| 2049 StubRoutines::_oop_arraycopy_uninit = | |
| 2050 generate_conjoint_copy(T_OBJECT, true, Address::times_ptr, entry, | |
| 2051 NULL, "oop_arraycopy_uninit", | |
| 2052 /*dest_uninitialized*/true); | |
| 2053 | |
| 0 | 2054 StubRoutines::_jlong_disjoint_arraycopy = |
| 2055 generate_disjoint_long_copy(&entry, "jlong_disjoint_arraycopy"); | |
| 2056 StubRoutines::_jlong_arraycopy = | |
| 2057 generate_conjoint_long_copy(entry, &entry_jlong_arraycopy, | |
| 2058 "jlong_arraycopy"); | |
| 2059 | |
| 1763 | 2060 StubRoutines::_jbyte_fill = generate_fill(T_BYTE, false, "jbyte_fill"); |
| 2061 StubRoutines::_jshort_fill = generate_fill(T_SHORT, false, "jshort_fill"); | |
| 2062 StubRoutines::_jint_fill = generate_fill(T_INT, false, "jint_fill"); | |
| 2063 StubRoutines::_arrayof_jbyte_fill = generate_fill(T_BYTE, true, "arrayof_jbyte_fill"); | |
| 2064 StubRoutines::_arrayof_jshort_fill = generate_fill(T_SHORT, true, "arrayof_jshort_fill"); | |
| 2065 StubRoutines::_arrayof_jint_fill = generate_fill(T_INT, true, "arrayof_jint_fill"); | |
| 2066 | |
| 2324 | 2067 StubRoutines::_arrayof_jint_disjoint_arraycopy = StubRoutines::_jint_disjoint_arraycopy; |
| 2068 StubRoutines::_arrayof_oop_disjoint_arraycopy = StubRoutines::_oop_disjoint_arraycopy; | |
| 2069 StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = StubRoutines::_oop_disjoint_arraycopy_uninit; | |
| 2070 StubRoutines::_arrayof_jlong_disjoint_arraycopy = StubRoutines::_jlong_disjoint_arraycopy; | |
| 0 | 2071 |
| 2324 | 2072 StubRoutines::_arrayof_jint_arraycopy = StubRoutines::_jint_arraycopy; |
| 2073 StubRoutines::_arrayof_oop_arraycopy = StubRoutines::_oop_arraycopy; | |
| 2074 StubRoutines::_arrayof_oop_arraycopy_uninit = StubRoutines::_oop_arraycopy_uninit; | |
| 2075 StubRoutines::_arrayof_jlong_arraycopy = StubRoutines::_jlong_arraycopy; | |
| 0 | 2076 |
| 2077 StubRoutines::_checkcast_arraycopy = | |
| 2324 | 2078 generate_checkcast_copy("checkcast_arraycopy", &entry_checkcast_arraycopy); |
| 2079 StubRoutines::_checkcast_arraycopy_uninit = | |
| 2080 generate_checkcast_copy("checkcast_arraycopy_uninit", NULL, /*dest_uninitialized*/true); | |
| 0 | 2081 |
| 2082 StubRoutines::_unsafe_arraycopy = | |
| 2083 generate_unsafe_copy("unsafe_arraycopy", | |
| 2084 entry_jbyte_arraycopy, | |
| 2085 entry_jshort_arraycopy, | |
| 2086 entry_jint_arraycopy, | |
| 2087 entry_jlong_arraycopy); | |
| 2088 | |
| 2089 StubRoutines::_generic_arraycopy = | |
| 2090 generate_generic_copy("generic_arraycopy", | |
| 2091 entry_jbyte_arraycopy, | |
| 2092 entry_jshort_arraycopy, | |
| 2093 entry_jint_arraycopy, | |
| 2094 entry_oop_arraycopy, | |
| 2095 entry_jlong_arraycopy, | |
| 2096 entry_checkcast_arraycopy); | |
| 2097 } | |
| 2098 | |
|
1174
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2099 void generate_math_stubs() { |
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2100 { |
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2101 StubCodeMark mark(this, "StubRoutines", "log"); |
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2102 StubRoutines::_intrinsic_log = (double (*)(double)) __ pc(); |
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2103 |
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2104 __ fld_d(Address(rsp, 4)); |
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2105 __ flog(); |
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2106 __ ret(0); |
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2107 } |
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2108 { |
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2109 StubCodeMark mark(this, "StubRoutines", "log10"); |
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2110 StubRoutines::_intrinsic_log10 = (double (*)(double)) __ pc(); |
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2111 |
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2112 __ fld_d(Address(rsp, 4)); |
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2113 __ flog10(); |
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2114 __ ret(0); |
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2115 } |
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2116 { |
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2117 StubCodeMark mark(this, "StubRoutines", "sin"); |
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2118 StubRoutines::_intrinsic_sin = (double (*)(double)) __ pc(); |
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2119 |
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2120 __ fld_d(Address(rsp, 4)); |
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2121 __ trigfunc('s'); |
|
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2122 __ ret(0); |
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2123 } |
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2124 { |
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2125 StubCodeMark mark(this, "StubRoutines", "cos"); |
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2126 StubRoutines::_intrinsic_cos = (double (*)(double)) __ pc(); |
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2127 |
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2128 __ fld_d(Address(rsp, 4)); |
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2129 __ trigfunc('c'); |
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2130 __ ret(0); |
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2131 } |
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2132 { |
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2133 StubCodeMark mark(this, "StubRoutines", "tan"); |
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2134 StubRoutines::_intrinsic_tan = (double (*)(double)) __ pc(); |
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2135 |
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2136 __ fld_d(Address(rsp, 4)); |
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2137 __ trigfunc('t'); |
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2138 __ ret(0); |
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2139 } |
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2140 |
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2141 // The intrinsic version of these seem to return the same value as |
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2142 // the strict version. |
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2143 StubRoutines::_intrinsic_exp = SharedRuntime::dexp; |
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2144 StubRoutines::_intrinsic_pow = SharedRuntime::dpow; |
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2145 } |
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2146 |
| 0 | 2147 public: |
| 2148 // Information about frame layout at time of blocking runtime call. | |
| 2149 // Note that we only have to preserve callee-saved registers since | |
| 2150 // the compilers are responsible for supplying a continuation point | |
| 2151 // if they expect all registers to be preserved. | |
| 2152 enum layout { | |
| 2153 thread_off, // last_java_sp | |
|
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2154 arg1_off, |
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2155 arg2_off, |
| 0 | 2156 rbp_off, // callee saved register |
| 2157 ret_pc, | |
| 2158 framesize | |
| 2159 }; | |
| 2160 | |
| 2161 private: | |
| 2162 | |
| 2163 #undef __ | |
| 2164 #define __ masm-> | |
| 2165 | |
| 2166 //------------------------------------------------------------------------------------------------------------------------ | |
| 2167 // Continuation point for throwing of implicit exceptions that are not handled in | |
| 2168 // the current activation. Fabricates an exception oop and initiates normal | |
| 2169 // exception dispatching in this frame. | |
| 2170 // | |
| 2171 // Previously the compiler (c2) allowed for callee save registers on Java calls. | |
| 2172 // This is no longer true after adapter frames were removed but could possibly | |
| 2173 // be brought back in the future if the interpreter code was reworked and it | |
| 2174 // was deemed worthwhile. The comment below was left to describe what must | |
| 2175 // happen here if callee saves were resurrected. As it stands now this stub | |
| 2176 // could actually be a vanilla BufferBlob and have now oopMap at all. | |
| 2177 // Since it doesn't make much difference we've chosen to leave it the | |
| 2178 // way it was in the callee save days and keep the comment. | |
| 2179 | |
| 2180 // If we need to preserve callee-saved values we need a callee-saved oop map and | |
| 2181 // therefore have to make these stubs into RuntimeStubs rather than BufferBlobs. | |
| 2182 // If the compiler needs all registers to be preserved between the fault | |
| 2183 // point and the exception handler then it must assume responsibility for that in | |
| 2184 // AbstractCompiler::continuation_for_implicit_null_exception or | |
| 2185 // continuation_for_implicit_division_by_zero_exception. All other implicit | |
| 2186 // exceptions (e.g., NullPointerException or AbstractMethodError on entry) are | |
| 2187 // either at call sites or otherwise assume that stack unwinding will be initiated, | |
| 2188 // so caller saved registers were assumed volatile in the compiler. | |
| 2189 address generate_throw_exception(const char* name, address runtime_entry, | |
| 3937 | 2190 Register arg1 = noreg, Register arg2 = noreg) { |
| 0 | 2191 |
| 2192 int insts_size = 256; | |
| 2193 int locs_size = 32; | |
| 2194 | |
| 2195 CodeBuffer code(name, insts_size, locs_size); | |
| 2196 OopMapSet* oop_maps = new OopMapSet(); | |
| 2197 MacroAssembler* masm = new MacroAssembler(&code); | |
| 2198 | |
| 2199 address start = __ pc(); | |
| 2200 | |
| 2201 // This is an inlined and slightly modified version of call_VM | |
| 2202 // which has the ability to fetch the return PC out of | |
| 2203 // thread-local storage and also sets up last_Java_sp slightly | |
| 2204 // differently than the real call_VM | |
| 2205 Register java_thread = rbx; | |
| 2206 __ get_thread(java_thread); | |
| 2207 | |
| 2208 __ enter(); // required for proper stackwalking of RuntimeStub frame | |
| 2209 | |
| 2210 // pc and rbp, already pushed | |
| 304 | 2211 __ subptr(rsp, (framesize-2) * wordSize); // prolog |
| 0 | 2212 |
| 2213 // Frame is now completed as far as size and linkage. | |
| 2214 | |
| 2215 int frame_complete = __ pc() - start; | |
| 2216 | |
| 2217 // push java thread (becomes first argument of C function) | |
| 304 | 2218 __ movptr(Address(rsp, thread_off * wordSize), java_thread); |
|
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2219 if (arg1 != noreg) { |
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2220 __ movptr(Address(rsp, arg1_off * wordSize), arg1); |
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2221 } |
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2222 if (arg2 != noreg) { |
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2223 assert(arg1 != noreg, "missing reg arg"); |
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2224 __ movptr(Address(rsp, arg2_off * wordSize), arg2); |
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2225 } |
| 0 | 2226 |
| 2227 // Set up last_Java_sp and last_Java_fp | |
| 2228 __ set_last_Java_frame(java_thread, rsp, rbp, NULL); | |
| 2229 | |
| 2230 // Call runtime | |
| 2231 BLOCK_COMMENT("call runtime_entry"); | |
| 2232 __ call(RuntimeAddress(runtime_entry)); | |
| 2233 // Generate oop map | |
| 2234 OopMap* map = new OopMap(framesize, 0); | |
| 2235 oop_maps->add_gc_map(__ pc() - start, map); | |
| 2236 | |
| 2237 // restore the thread (cannot use the pushed argument since arguments | |
| 2238 // may be overwritten by C code generated by an optimizing compiler); | |
| 2239 // however can use the register value directly if it is callee saved. | |
| 2240 __ get_thread(java_thread); | |
| 2241 | |
| 2242 __ reset_last_Java_frame(java_thread, true, false); | |
| 2243 | |
| 2244 __ leave(); // required for proper stackwalking of RuntimeStub frame | |
| 2245 | |
| 2246 // check for pending exceptions | |
| 2247 #ifdef ASSERT | |
| 2248 Label L; | |
| 304 | 2249 __ cmpptr(Address(java_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
| 0 | 2250 __ jcc(Assembler::notEqual, L); |
| 2251 __ should_not_reach_here(); | |
| 2252 __ bind(L); | |
| 2253 #endif /* ASSERT */ | |
| 2254 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
| 2255 | |
| 2256 | |
| 2257 RuntimeStub* stub = RuntimeStub::new_runtime_stub(name, &code, frame_complete, framesize, oop_maps, false); | |
| 2258 return stub->entry_point(); | |
| 2259 } | |
| 2260 | |
| 2261 | |
| 2262 void create_control_words() { | |
| 2263 // Round to nearest, 53-bit mode, exceptions masked | |
| 2264 StubRoutines::_fpu_cntrl_wrd_std = 0x027F; | |
| 2265 // Round to zero, 53-bit mode, exception mased | |
| 2266 StubRoutines::_fpu_cntrl_wrd_trunc = 0x0D7F; | |
| 2267 // Round to nearest, 24-bit mode, exceptions masked | |
| 2268 StubRoutines::_fpu_cntrl_wrd_24 = 0x007F; | |
| 2269 // Round to nearest, 64-bit mode, exceptions masked | |
| 2270 StubRoutines::_fpu_cntrl_wrd_64 = 0x037F; | |
| 2271 // Round to nearest, 64-bit mode, exceptions masked | |
| 2272 StubRoutines::_mxcsr_std = 0x1F80; | |
| 2273 // Note: the following two constants are 80-bit values | |
| 2274 // layout is critical for correct loading by FPU. | |
| 2275 // Bias for strict fp multiply/divide | |
| 2276 StubRoutines::_fpu_subnormal_bias1[0]= 0x00000000; // 2^(-15360) == 0x03ff 8000 0000 0000 0000 | |
| 2277 StubRoutines::_fpu_subnormal_bias1[1]= 0x80000000; | |
| 2278 StubRoutines::_fpu_subnormal_bias1[2]= 0x03ff; | |
| 2279 // Un-Bias for strict fp multiply/divide | |
| 2280 StubRoutines::_fpu_subnormal_bias2[0]= 0x00000000; // 2^(+15360) == 0x7bff 8000 0000 0000 0000 | |
| 2281 StubRoutines::_fpu_subnormal_bias2[1]= 0x80000000; | |
| 2282 StubRoutines::_fpu_subnormal_bias2[2]= 0x7bff; | |
| 2283 } | |
| 2284 | |
| 2285 //--------------------------------------------------------------------------- | |
| 2286 // Initialization | |
| 2287 | |
| 2288 void generate_initial() { | |
| 2289 // Generates all stubs and initializes the entry points | |
| 2290 | |
| 2291 //------------------------------------------------------------------------------------------------------------------------ | |
| 2292 // entry points that exist in all platforms | |
| 2293 // Note: This is code that could be shared among different platforms - however the benefit seems to be smaller than | |
| 2294 // the disadvantage of having a much more complicated generator structure. See also comment in stubRoutines.hpp. | |
| 2295 StubRoutines::_forward_exception_entry = generate_forward_exception(); | |
| 2296 | |
| 2297 StubRoutines::_call_stub_entry = | |
| 2298 generate_call_stub(StubRoutines::_call_stub_return_address); | |
| 2299 // is referenced by megamorphic call | |
| 2300 StubRoutines::_catch_exception_entry = generate_catch_exception(); | |
| 2301 | |
| 2302 // These are currently used by Solaris/Intel | |
| 2303 StubRoutines::_atomic_xchg_entry = generate_atomic_xchg(); | |
| 2304 | |
| 2305 StubRoutines::_handler_for_unsafe_access_entry = | |
| 2306 generate_handler_for_unsafe_access(); | |
| 2307 | |
| 2308 // platform dependent | |
| 2309 create_control_words(); | |
| 2310 | |
| 304 | 2311 StubRoutines::x86::_verify_mxcsr_entry = generate_verify_mxcsr(); |
| 2312 StubRoutines::x86::_verify_fpu_cntrl_wrd_entry = generate_verify_fpu_cntrl_wrd(); | |
| 0 | 2313 StubRoutines::_d2i_wrapper = generate_d2i_wrapper(T_INT, |
| 2314 CAST_FROM_FN_PTR(address, SharedRuntime::d2i)); | |
| 2315 StubRoutines::_d2l_wrapper = generate_d2i_wrapper(T_LONG, | |
| 2316 CAST_FROM_FN_PTR(address, SharedRuntime::d2l)); | |
|
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2317 |
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2318 // Build this early so it's available for the interpreter |
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2319 StubRoutines::_throw_WrongMethodTypeException_entry = |
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2320 generate_throw_exception("WrongMethodTypeException throw_exception", |
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|
2321 CAST_FROM_FN_PTR(address, SharedRuntime::throw_WrongMethodTypeException), |
| 3937 | 2322 rax, rcx); |
| 0 | 2323 } |
| 2324 | |
| 2325 | |
| 2326 void generate_all() { | |
| 2327 // Generates all stubs and initializes the entry points | |
| 2328 | |
| 2329 // These entry points require SharedInfo::stack0 to be set up in non-core builds | |
| 2330 // and need to be relocatable, so they each fabricate a RuntimeStub internally. | |
| 3937 | 2331 StubRoutines::_throw_AbstractMethodError_entry = generate_throw_exception("AbstractMethodError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_AbstractMethodError)); |
| 2332 StubRoutines::_throw_IncompatibleClassChangeError_entry= generate_throw_exception("IncompatibleClassChangeError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_IncompatibleClassChangeError)); | |
| 2333 StubRoutines::_throw_NullPointerException_at_call_entry= generate_throw_exception("NullPointerException at call throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException_at_call)); | |
| 2334 StubRoutines::_throw_StackOverflowError_entry = generate_throw_exception("StackOverflowError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_StackOverflowError)); | |
| 0 | 2335 |
| 2336 //------------------------------------------------------------------------------------------------------------------------ | |
| 2337 // entry points that are platform specific | |
| 2338 | |
| 2339 // support for verify_oop (must happen after universe_init) | |
| 2340 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop(); | |
| 2341 | |
| 2342 // arraycopy stubs used by compilers | |
| 2343 generate_arraycopy_stubs(); | |
| 710 | 2344 |
|
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|
2345 generate_math_stubs(); |
| 0 | 2346 } |
| 2347 | |
| 2348 | |
| 2349 public: | |
| 2350 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) { | |
| 2351 if (all) { | |
| 2352 generate_all(); | |
| 2353 } else { | |
| 2354 generate_initial(); | |
| 2355 } | |
| 2356 } | |
| 2357 }; // end class declaration | |
| 2358 | |
| 2359 | |
| 2360 void StubGenerator_generate(CodeBuffer* code, bool all) { | |
| 2361 StubGenerator g(code, all); | |
| 2362 } |