Mercurial > hg > truffle
annotate src/cpu/sparc/vm/stubGenerator_sparc.cpp @ 113:ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
| author | coleenp |
|---|---|
| date | Sun, 13 Apr 2008 17:43:42 -0400 |
| parents | f8236e79048a |
| children | d1605aabd0a1 37f87013dfd8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. | |
| 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_stubGenerator_sparc.cpp.incl" | |
| 27 | |
| 28 // Declaration and definition of StubGenerator (no .hpp file). | |
| 29 // For a more detailed description of the stub routine structure | |
| 30 // see the comment in stubRoutines.hpp. | |
| 31 | |
| 32 #define __ _masm-> | |
| 33 | |
| 34 #ifdef PRODUCT | |
| 35 #define BLOCK_COMMENT(str) /* nothing */ | |
| 36 #else | |
| 37 #define BLOCK_COMMENT(str) __ block_comment(str) | |
| 38 #endif | |
| 39 | |
| 40 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") | |
| 41 | |
| 42 // Note: The register L7 is used as L7_thread_cache, and may not be used | |
| 43 // any other way within this module. | |
| 44 | |
| 45 | |
| 46 static const Register& Lstub_temp = L2; | |
| 47 | |
| 48 // ------------------------------------------------------------------------------------------------------------------------- | |
| 49 // Stub Code definitions | |
| 50 | |
| 51 static address handle_unsafe_access() { | |
| 52 JavaThread* thread = JavaThread::current(); | |
| 53 address pc = thread->saved_exception_pc(); | |
| 54 address npc = thread->saved_exception_npc(); | |
| 55 // pc is the instruction which we must emulate | |
| 56 // doing a no-op is fine: return garbage from the load | |
| 57 | |
| 58 // request an async exception | |
| 59 thread->set_pending_unsafe_access_error(); | |
| 60 | |
| 61 // return address of next instruction to execute | |
| 62 return npc; | |
| 63 } | |
| 64 | |
| 65 class StubGenerator: public StubCodeGenerator { | |
| 66 private: | |
| 67 | |
| 68 #ifdef PRODUCT | |
| 69 #define inc_counter_np(a,b,c) (0) | |
| 70 #else | |
| 71 void inc_counter_np_(int& counter, Register t1, Register t2) { | |
| 72 Address counter_addr(t2, (address) &counter); | |
| 73 __ sethi(counter_addr); | |
| 74 __ ld(counter_addr, t1); | |
| 75 __ inc(t1); | |
| 76 __ st(t1, counter_addr); | |
| 77 } | |
| 78 #define inc_counter_np(counter, t1, t2) \ | |
| 79 BLOCK_COMMENT("inc_counter " #counter); \ | |
| 80 inc_counter_np_(counter, t1, t2); | |
| 81 #endif | |
| 82 | |
| 83 //---------------------------------------------------------------------------------------------------- | |
| 84 // Call stubs are used to call Java from C | |
| 85 | |
| 86 address generate_call_stub(address& return_pc) { | |
| 87 StubCodeMark mark(this, "StubRoutines", "call_stub"); | |
| 88 address start = __ pc(); | |
| 89 | |
| 90 // Incoming arguments: | |
| 91 // | |
| 92 // o0 : call wrapper address | |
| 93 // o1 : result (address) | |
| 94 // o2 : result type | |
| 95 // o3 : method | |
| 96 // o4 : (interpreter) entry point | |
| 97 // o5 : parameters (address) | |
| 98 // [sp + 0x5c]: parameter size (in words) | |
| 99 // [sp + 0x60]: thread | |
| 100 // | |
| 101 // +---------------+ <--- sp + 0 | |
| 102 // | | | |
| 103 // . reg save area . | |
| 104 // | | | |
| 105 // +---------------+ <--- sp + 0x40 | |
| 106 // | | | |
| 107 // . extra 7 slots . | |
| 108 // | | | |
| 109 // +---------------+ <--- sp + 0x5c | |
| 110 // | param. size | | |
| 111 // +---------------+ <--- sp + 0x60 | |
| 112 // | thread | | |
| 113 // +---------------+ | |
| 114 // | | | |
| 115 | |
| 116 // note: if the link argument position changes, adjust | |
| 117 // the code in frame::entry_frame_call_wrapper() | |
| 118 | |
| 119 const Argument link = Argument(0, false); // used only for GC | |
| 120 const Argument result = Argument(1, false); | |
| 121 const Argument result_type = Argument(2, false); | |
| 122 const Argument method = Argument(3, false); | |
| 123 const Argument entry_point = Argument(4, false); | |
| 124 const Argument parameters = Argument(5, false); | |
| 125 const Argument parameter_size = Argument(6, false); | |
| 126 const Argument thread = Argument(7, false); | |
| 127 | |
| 128 // setup thread register | |
| 129 __ ld_ptr(thread.as_address(), G2_thread); | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
16
diff
changeset
|
130 __ reinit_heapbase(); |
| 0 | 131 |
| 132 #ifdef ASSERT | |
| 133 // make sure we have no pending exceptions | |
| 134 { const Register t = G3_scratch; | |
| 135 Label L; | |
| 136 __ ld_ptr(G2_thread, in_bytes(Thread::pending_exception_offset()), t); | |
| 137 __ br_null(t, false, Assembler::pt, L); | |
| 138 __ delayed()->nop(); | |
| 139 __ stop("StubRoutines::call_stub: entered with pending exception"); | |
| 140 __ bind(L); | |
| 141 } | |
| 142 #endif | |
| 143 | |
| 144 // create activation frame & allocate space for parameters | |
| 145 { const Register t = G3_scratch; | |
| 146 __ ld_ptr(parameter_size.as_address(), t); // get parameter size (in words) | |
| 147 __ add(t, frame::memory_parameter_word_sp_offset, t); // add space for save area (in words) | |
| 148 __ round_to(t, WordsPerLong); // make sure it is multiple of 2 (in words) | |
| 149 __ sll(t, Interpreter::logStackElementSize(), t); // compute number of bytes | |
| 150 __ neg(t); // negate so it can be used with save | |
| 151 __ save(SP, t, SP); // setup new frame | |
| 152 } | |
| 153 | |
| 154 // +---------------+ <--- sp + 0 | |
| 155 // | | | |
| 156 // . reg save area . | |
| 157 // | | | |
| 158 // +---------------+ <--- sp + 0x40 | |
| 159 // | | | |
| 160 // . extra 7 slots . | |
| 161 // | | | |
| 162 // +---------------+ <--- sp + 0x5c | |
| 163 // | empty slot | (only if parameter size is even) | |
| 164 // +---------------+ | |
| 165 // | | | |
| 166 // . parameters . | |
| 167 // | | | |
| 168 // +---------------+ <--- fp + 0 | |
| 169 // | | | |
| 170 // . reg save area . | |
| 171 // | | | |
| 172 // +---------------+ <--- fp + 0x40 | |
| 173 // | | | |
| 174 // . extra 7 slots . | |
| 175 // | | | |
| 176 // +---------------+ <--- fp + 0x5c | |
| 177 // | param. size | | |
| 178 // +---------------+ <--- fp + 0x60 | |
| 179 // | thread | | |
| 180 // +---------------+ | |
| 181 // | | | |
| 182 | |
| 183 // pass parameters if any | |
| 184 BLOCK_COMMENT("pass parameters if any"); | |
| 185 { const Register src = parameters.as_in().as_register(); | |
| 186 const Register dst = Lentry_args; | |
| 187 const Register tmp = G3_scratch; | |
| 188 const Register cnt = G4_scratch; | |
| 189 | |
| 190 // test if any parameters & setup of Lentry_args | |
| 191 Label exit; | |
| 192 __ ld_ptr(parameter_size.as_in().as_address(), cnt); // parameter counter | |
| 193 __ add( FP, STACK_BIAS, dst ); | |
| 194 __ tst(cnt); | |
| 195 __ br(Assembler::zero, false, Assembler::pn, exit); | |
| 196 __ delayed()->sub(dst, BytesPerWord, dst); // setup Lentry_args | |
| 197 | |
| 198 // copy parameters if any | |
| 199 Label loop; | |
| 200 __ BIND(loop); | |
| 201 // Store tag first. | |
| 202 if (TaggedStackInterpreter) { | |
| 203 __ ld_ptr(src, 0, tmp); | |
| 204 __ add(src, BytesPerWord, src); // get next | |
| 205 __ st_ptr(tmp, dst, Interpreter::tag_offset_in_bytes()); | |
| 206 } | |
| 207 // Store parameter value | |
| 208 __ ld_ptr(src, 0, tmp); | |
| 209 __ add(src, BytesPerWord, src); | |
| 210 __ st_ptr(tmp, dst, Interpreter::value_offset_in_bytes()); | |
| 211 __ deccc(cnt); | |
| 212 __ br(Assembler::greater, false, Assembler::pt, loop); | |
| 213 __ delayed()->sub(dst, Interpreter::stackElementSize(), dst); | |
| 214 | |
| 215 // done | |
| 216 __ BIND(exit); | |
| 217 } | |
| 218 | |
| 219 // setup parameters, method & call Java function | |
| 220 #ifdef ASSERT | |
| 221 // layout_activation_impl checks it's notion of saved SP against | |
| 222 // this register, so if this changes update it as well. | |
| 223 const Register saved_SP = Lscratch; | |
| 224 __ mov(SP, saved_SP); // keep track of SP before call | |
| 225 #endif | |
| 226 | |
| 227 // setup parameters | |
| 228 const Register t = G3_scratch; | |
| 229 __ ld_ptr(parameter_size.as_in().as_address(), t); // get parameter size (in words) | |
| 230 __ sll(t, Interpreter::logStackElementSize(), t); // compute number of bytes | |
| 231 __ sub(FP, t, Gargs); // setup parameter pointer | |
| 232 #ifdef _LP64 | |
| 233 __ add( Gargs, STACK_BIAS, Gargs ); // Account for LP64 stack bias | |
| 234 #endif | |
| 235 __ mov(SP, O5_savedSP); | |
| 236 | |
| 237 | |
| 238 // do the call | |
| 239 // | |
| 240 // the following register must be setup: | |
| 241 // | |
| 242 // G2_thread | |
| 243 // G5_method | |
| 244 // Gargs | |
| 245 BLOCK_COMMENT("call Java function"); | |
| 246 __ jmpl(entry_point.as_in().as_register(), G0, O7); | |
| 247 __ delayed()->mov(method.as_in().as_register(), G5_method); // setup method | |
| 248 | |
| 249 BLOCK_COMMENT("call_stub_return_address:"); | |
| 250 return_pc = __ pc(); | |
| 251 | |
| 252 // The callee, if it wasn't interpreted, can return with SP changed so | |
| 253 // we can no longer assert of change of SP. | |
| 254 | |
| 255 // store result depending on type | |
| 256 // (everything that is not T_OBJECT, T_LONG, T_FLOAT, or T_DOUBLE | |
| 257 // is treated as T_INT) | |
| 258 { const Register addr = result .as_in().as_register(); | |
| 259 const Register type = result_type.as_in().as_register(); | |
| 260 Label is_long, is_float, is_double, is_object, exit; | |
| 261 __ cmp(type, T_OBJECT); __ br(Assembler::equal, false, Assembler::pn, is_object); | |
| 262 __ delayed()->cmp(type, T_FLOAT); __ br(Assembler::equal, false, Assembler::pn, is_float); | |
| 263 __ delayed()->cmp(type, T_DOUBLE); __ br(Assembler::equal, false, Assembler::pn, is_double); | |
| 264 __ delayed()->cmp(type, T_LONG); __ br(Assembler::equal, false, Assembler::pn, is_long); | |
| 265 __ delayed()->nop(); | |
| 266 | |
| 267 // store int result | |
| 268 __ st(O0, addr, G0); | |
| 269 | |
| 270 __ BIND(exit); | |
| 271 __ ret(); | |
| 272 __ delayed()->restore(); | |
| 273 | |
| 274 __ BIND(is_object); | |
| 275 __ ba(false, exit); | |
| 276 __ delayed()->st_ptr(O0, addr, G0); | |
| 277 | |
| 278 __ BIND(is_float); | |
| 279 __ ba(false, exit); | |
| 280 __ delayed()->stf(FloatRegisterImpl::S, F0, addr, G0); | |
| 281 | |
| 282 __ BIND(is_double); | |
| 283 __ ba(false, exit); | |
| 284 __ delayed()->stf(FloatRegisterImpl::D, F0, addr, G0); | |
| 285 | |
| 286 __ BIND(is_long); | |
| 287 #ifdef _LP64 | |
| 288 __ ba(false, exit); | |
| 289 __ delayed()->st_long(O0, addr, G0); // store entire long | |
| 290 #else | |
| 291 #if defined(COMPILER2) | |
| 292 // All return values are where we want them, except for Longs. C2 returns | |
| 293 // longs in G1 in the 32-bit build whereas the interpreter wants them in O0/O1. | |
| 294 // Since the interpreter will return longs in G1 and O0/O1 in the 32bit | |
| 295 // build we simply always use G1. | |
| 296 // Note: I tried to make c2 return longs in O0/O1 and G1 so we wouldn't have to | |
| 297 // do this here. Unfortunately if we did a rethrow we'd see an machepilog node | |
| 298 // first which would move g1 -> O0/O1 and destroy the exception we were throwing. | |
| 299 | |
| 300 __ ba(false, exit); | |
| 301 __ delayed()->stx(G1, addr, G0); // store entire long | |
| 302 #else | |
| 303 __ st(O1, addr, BytesPerInt); | |
| 304 __ ba(false, exit); | |
| 305 __ delayed()->st(O0, addr, G0); | |
| 306 #endif /* COMPILER2 */ | |
| 307 #endif /* _LP64 */ | |
| 308 } | |
| 309 return start; | |
| 310 } | |
| 311 | |
| 312 | |
| 313 //---------------------------------------------------------------------------------------------------- | |
| 314 // Return point for a Java call if there's an exception thrown in Java code. | |
| 315 // The exception is caught and transformed into a pending exception stored in | |
| 316 // JavaThread that can be tested from within the VM. | |
| 317 // | |
| 318 // Oexception: exception oop | |
| 319 | |
| 320 address generate_catch_exception() { | |
| 321 StubCodeMark mark(this, "StubRoutines", "catch_exception"); | |
| 322 | |
| 323 address start = __ pc(); | |
| 324 // verify that thread corresponds | |
| 325 __ verify_thread(); | |
| 326 | |
| 327 const Register& temp_reg = Gtemp; | |
| 328 Address pending_exception_addr (G2_thread, 0, in_bytes(Thread::pending_exception_offset())); | |
| 329 Address exception_file_offset_addr(G2_thread, 0, in_bytes(Thread::exception_file_offset ())); | |
| 330 Address exception_line_offset_addr(G2_thread, 0, in_bytes(Thread::exception_line_offset ())); | |
| 331 | |
| 332 // set pending exception | |
| 333 __ verify_oop(Oexception); | |
| 334 __ st_ptr(Oexception, pending_exception_addr); | |
| 335 __ set((intptr_t)__FILE__, temp_reg); | |
| 336 __ st_ptr(temp_reg, exception_file_offset_addr); | |
| 337 __ set((intptr_t)__LINE__, temp_reg); | |
| 338 __ st(temp_reg, exception_line_offset_addr); | |
| 339 | |
| 340 // complete return to VM | |
| 341 assert(StubRoutines::_call_stub_return_address != NULL, "must have been generated before"); | |
| 342 | |
| 343 Address stub_ret(temp_reg, StubRoutines::_call_stub_return_address); | |
| 344 __ jump_to(stub_ret); | |
| 345 __ delayed()->nop(); | |
| 346 | |
| 347 return start; | |
| 348 } | |
| 349 | |
| 350 | |
| 351 //---------------------------------------------------------------------------------------------------- | |
| 352 // Continuation point for runtime calls returning with a pending exception | |
| 353 // The pending exception check happened in the runtime or native call stub | |
| 354 // The pending exception in Thread is converted into a Java-level exception | |
| 355 // | |
| 356 // Contract with Java-level exception handler: O0 = exception | |
| 357 // O1 = throwing pc | |
| 358 | |
| 359 address generate_forward_exception() { | |
| 360 StubCodeMark mark(this, "StubRoutines", "forward_exception"); | |
| 361 address start = __ pc(); | |
| 362 | |
| 363 // Upon entry, O7 has the return address returning into Java | |
| 364 // (interpreted or compiled) code; i.e. the return address | |
| 365 // becomes the throwing pc. | |
| 366 | |
| 367 const Register& handler_reg = Gtemp; | |
| 368 | |
| 369 Address exception_addr (G2_thread, 0, in_bytes(Thread::pending_exception_offset())); | |
| 370 | |
| 371 #ifdef ASSERT | |
| 372 // make sure that this code is only executed if there is a pending exception | |
| 373 { Label L; | |
| 374 __ ld_ptr(exception_addr, Gtemp); | |
| 375 __ br_notnull(Gtemp, false, Assembler::pt, L); | |
| 376 __ delayed()->nop(); | |
| 377 __ stop("StubRoutines::forward exception: no pending exception (1)"); | |
| 378 __ bind(L); | |
| 379 } | |
| 380 #endif | |
| 381 | |
| 382 // compute exception handler into handler_reg | |
| 383 __ get_thread(); | |
| 384 __ ld_ptr(exception_addr, Oexception); | |
| 385 __ verify_oop(Oexception); | |
| 386 __ save_frame(0); // compensates for compiler weakness | |
| 387 __ add(O7->after_save(), frame::pc_return_offset, Lscratch); // save the issuing PC | |
| 388 BLOCK_COMMENT("call exception_handler_for_return_address"); | |
| 389 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), Lscratch); | |
| 390 __ mov(O0, handler_reg); | |
| 391 __ restore(); // compensates for compiler weakness | |
| 392 | |
| 393 __ ld_ptr(exception_addr, Oexception); | |
| 394 __ add(O7, frame::pc_return_offset, Oissuing_pc); // save the issuing PC | |
| 395 | |
| 396 #ifdef ASSERT | |
| 397 // make sure exception is set | |
| 398 { Label L; | |
| 399 __ br_notnull(Oexception, false, Assembler::pt, L); | |
| 400 __ delayed()->nop(); | |
| 401 __ stop("StubRoutines::forward exception: no pending exception (2)"); | |
| 402 __ bind(L); | |
| 403 } | |
| 404 #endif | |
| 405 // jump to exception handler | |
| 406 __ jmp(handler_reg, 0); | |
| 407 // clear pending exception | |
| 408 __ delayed()->st_ptr(G0, exception_addr); | |
| 409 | |
| 410 return start; | |
| 411 } | |
| 412 | |
| 413 | |
| 414 //------------------------------------------------------------------------------------------------------------------------ | |
| 415 // Continuation point for throwing of implicit exceptions that are not handled in | |
| 416 // the current activation. Fabricates an exception oop and initiates normal | |
| 417 // exception dispatching in this frame. Only callee-saved registers are preserved | |
| 418 // (through the normal register window / RegisterMap handling). | |
| 419 // If the compiler needs all registers to be preserved between the fault | |
| 420 // point and the exception handler then it must assume responsibility for that in | |
| 421 // AbstractCompiler::continuation_for_implicit_null_exception or | |
| 422 // continuation_for_implicit_division_by_zero_exception. All other implicit | |
| 423 // exceptions (e.g., NullPointerException or AbstractMethodError on entry) are | |
| 424 // either at call sites or otherwise assume that stack unwinding will be initiated, | |
| 425 // so caller saved registers were assumed volatile in the compiler. | |
| 426 | |
| 427 // Note that we generate only this stub into a RuntimeStub, because it needs to be | |
| 428 // properly traversed and ignored during GC, so we change the meaning of the "__" | |
| 429 // macro within this method. | |
| 430 #undef __ | |
| 431 #define __ masm-> | |
| 432 | |
| 433 address generate_throw_exception(const char* name, address runtime_entry, bool restore_saved_exception_pc) { | |
| 434 #ifdef ASSERT | |
| 435 int insts_size = VerifyThread ? 1 * K : 600; | |
| 436 #else | |
| 437 int insts_size = VerifyThread ? 1 * K : 256; | |
| 438 #endif /* ASSERT */ | |
| 439 int locs_size = 32; | |
| 440 | |
| 441 CodeBuffer code(name, insts_size, locs_size); | |
| 442 MacroAssembler* masm = new MacroAssembler(&code); | |
| 443 | |
| 444 __ verify_thread(); | |
| 445 | |
| 446 // This is an inlined and slightly modified version of call_VM | |
| 447 // which has the ability to fetch the return PC out of thread-local storage | |
| 448 __ assert_not_delayed(); | |
| 449 | |
| 450 // Note that we always push a frame because on the SPARC | |
| 451 // architecture, for all of our implicit exception kinds at call | |
| 452 // sites, the implicit exception is taken before the callee frame | |
| 453 // is pushed. | |
| 454 __ save_frame(0); | |
| 455 | |
| 456 int frame_complete = __ offset(); | |
| 457 | |
| 458 if (restore_saved_exception_pc) { | |
| 459 Address saved_exception_pc(G2_thread, 0, in_bytes(JavaThread::saved_exception_pc_offset())); | |
| 460 __ ld_ptr(saved_exception_pc, I7); | |
| 461 __ sub(I7, frame::pc_return_offset, I7); | |
| 462 } | |
| 463 | |
| 464 // Note that we always have a runtime stub frame on the top of stack by this point | |
| 465 Register last_java_sp = SP; | |
| 466 // 64-bit last_java_sp is biased! | |
| 467 __ set_last_Java_frame(last_java_sp, G0); | |
| 468 if (VerifyThread) __ mov(G2_thread, O0); // about to be smashed; pass early | |
| 469 __ save_thread(noreg); | |
| 470 // do the call | |
| 471 BLOCK_COMMENT("call runtime_entry"); | |
| 472 __ call(runtime_entry, relocInfo::runtime_call_type); | |
| 473 if (!VerifyThread) | |
| 474 __ delayed()->mov(G2_thread, O0); // pass thread as first argument | |
| 475 else | |
| 476 __ delayed()->nop(); // (thread already passed) | |
| 477 __ restore_thread(noreg); | |
| 478 __ reset_last_Java_frame(); | |
| 479 | |
| 480 // check for pending exceptions. use Gtemp as scratch register. | |
| 481 #ifdef ASSERT | |
| 482 Label L; | |
| 483 | |
| 484 Address exception_addr(G2_thread, 0, in_bytes(Thread::pending_exception_offset())); | |
| 485 Register scratch_reg = Gtemp; | |
| 486 __ ld_ptr(exception_addr, scratch_reg); | |
| 487 __ br_notnull(scratch_reg, false, Assembler::pt, L); | |
| 488 __ delayed()->nop(); | |
| 489 __ should_not_reach_here(); | |
| 490 __ bind(L); | |
| 491 #endif // ASSERT | |
| 492 BLOCK_COMMENT("call forward_exception_entry"); | |
| 493 __ call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type); | |
| 494 // we use O7 linkage so that forward_exception_entry has the issuing PC | |
| 495 __ delayed()->restore(); | |
| 496 | |
| 497 RuntimeStub* stub = RuntimeStub::new_runtime_stub(name, &code, frame_complete, masm->total_frame_size_in_bytes(0), NULL, false); | |
| 498 return stub->entry_point(); | |
| 499 } | |
| 500 | |
| 501 #undef __ | |
| 502 #define __ _masm-> | |
| 503 | |
| 504 | |
| 505 // Generate a routine that sets all the registers so we | |
| 506 // can tell if the stop routine prints them correctly. | |
| 507 address generate_test_stop() { | |
| 508 StubCodeMark mark(this, "StubRoutines", "test_stop"); | |
| 509 address start = __ pc(); | |
| 510 | |
| 511 int i; | |
| 512 | |
| 513 __ save_frame(0); | |
| 514 | |
| 515 static jfloat zero = 0.0, one = 1.0; | |
| 516 | |
| 517 // put addr in L0, then load through L0 to F0 | |
| 518 __ set((intptr_t)&zero, L0); __ ldf( FloatRegisterImpl::S, L0, 0, F0); | |
| 519 __ set((intptr_t)&one, L0); __ ldf( FloatRegisterImpl::S, L0, 0, F1); // 1.0 to F1 | |
| 520 | |
| 521 // use add to put 2..18 in F2..F18 | |
| 522 for ( i = 2; i <= 18; ++i ) { | |
| 523 __ fadd( FloatRegisterImpl::S, F1, as_FloatRegister(i-1), as_FloatRegister(i)); | |
| 524 } | |
| 525 | |
| 526 // Now put double 2 in F16, double 18 in F18 | |
| 527 __ ftof( FloatRegisterImpl::S, FloatRegisterImpl::D, F2, F16 ); | |
| 528 __ ftof( FloatRegisterImpl::S, FloatRegisterImpl::D, F18, F18 ); | |
| 529 | |
| 530 // use add to put 20..32 in F20..F32 | |
| 531 for (i = 20; i < 32; i += 2) { | |
| 532 __ fadd( FloatRegisterImpl::D, F16, as_FloatRegister(i-2), as_FloatRegister(i)); | |
| 533 } | |
| 534 | |
| 535 // put 0..7 in i's, 8..15 in l's, 16..23 in o's, 24..31 in g's | |
| 536 for ( i = 0; i < 8; ++i ) { | |
| 537 if (i < 6) { | |
| 538 __ set( i, as_iRegister(i)); | |
| 539 __ set(16 + i, as_oRegister(i)); | |
| 540 __ set(24 + i, as_gRegister(i)); | |
| 541 } | |
| 542 __ set( 8 + i, as_lRegister(i)); | |
| 543 } | |
| 544 | |
| 545 __ stop("testing stop"); | |
| 546 | |
| 547 | |
| 548 __ ret(); | |
| 549 __ delayed()->restore(); | |
| 550 | |
| 551 return start; | |
| 552 } | |
| 553 | |
| 554 | |
| 555 address generate_stop_subroutine() { | |
| 556 StubCodeMark mark(this, "StubRoutines", "stop_subroutine"); | |
| 557 address start = __ pc(); | |
| 558 | |
| 559 __ stop_subroutine(); | |
| 560 | |
| 561 return start; | |
| 562 } | |
| 563 | |
| 564 address generate_flush_callers_register_windows() { | |
| 565 StubCodeMark mark(this, "StubRoutines", "flush_callers_register_windows"); | |
| 566 address start = __ pc(); | |
| 567 | |
| 568 __ flush_windows(); | |
| 569 __ retl(false); | |
| 570 __ delayed()->add( FP, STACK_BIAS, O0 ); | |
| 571 // The returned value must be a stack pointer whose register save area | |
| 572 // is flushed, and will stay flushed while the caller executes. | |
| 573 | |
| 574 return start; | |
| 575 } | |
| 576 | |
| 577 // Helper functions for v8 atomic operations. | |
| 578 // | |
| 579 void get_v8_oop_lock_ptr(Register lock_ptr_reg, Register mark_oop_reg, Register scratch_reg) { | |
| 580 if (mark_oop_reg == noreg) { | |
| 581 address lock_ptr = (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(); | |
| 582 __ set((intptr_t)lock_ptr, lock_ptr_reg); | |
| 583 } else { | |
| 584 assert(scratch_reg != noreg, "just checking"); | |
| 585 address lock_ptr = (address)StubRoutines::Sparc::_v8_oop_lock_cache; | |
| 586 __ set((intptr_t)lock_ptr, lock_ptr_reg); | |
| 587 __ and3(mark_oop_reg, StubRoutines::Sparc::v8_oop_lock_mask_in_place, scratch_reg); | |
| 588 __ add(lock_ptr_reg, scratch_reg, lock_ptr_reg); | |
| 589 } | |
| 590 } | |
| 591 | |
| 592 void generate_v8_lock_prologue(Register lock_reg, Register lock_ptr_reg, Register yield_reg, Label& retry, Label& dontyield, Register mark_oop_reg = noreg, Register scratch_reg = noreg) { | |
| 593 | |
| 594 get_v8_oop_lock_ptr(lock_ptr_reg, mark_oop_reg, scratch_reg); | |
| 595 __ set(StubRoutines::Sparc::locked, lock_reg); | |
| 596 // Initialize yield counter | |
| 597 __ mov(G0,yield_reg); | |
| 598 | |
| 599 __ BIND(retry); | |
| 600 __ cmp(yield_reg, V8AtomicOperationUnderLockSpinCount); | |
| 601 __ br(Assembler::less, false, Assembler::pt, dontyield); | |
| 602 __ delayed()->nop(); | |
| 603 | |
| 604 // This code can only be called from inside the VM, this | |
| 605 // stub is only invoked from Atomic::add(). We do not | |
| 606 // want to use call_VM, because _last_java_sp and such | |
| 607 // must already be set. | |
| 608 // | |
| 609 // Save the regs and make space for a C call | |
| 610 __ save(SP, -96, SP); | |
| 611 __ save_all_globals_into_locals(); | |
| 612 BLOCK_COMMENT("call os::naked_sleep"); | |
| 613 __ call(CAST_FROM_FN_PTR(address, os::naked_sleep)); | |
| 614 __ delayed()->nop(); | |
| 615 __ restore_globals_from_locals(); | |
| 616 __ restore(); | |
| 617 // reset the counter | |
| 618 __ mov(G0,yield_reg); | |
| 619 | |
| 620 __ BIND(dontyield); | |
| 621 | |
| 622 // try to get lock | |
| 623 __ swap(lock_ptr_reg, 0, lock_reg); | |
| 624 | |
| 625 // did we get the lock? | |
| 626 __ cmp(lock_reg, StubRoutines::Sparc::unlocked); | |
| 627 __ br(Assembler::notEqual, true, Assembler::pn, retry); | |
| 628 __ delayed()->add(yield_reg,1,yield_reg); | |
| 629 | |
| 630 // yes, got lock. do the operation here. | |
| 631 } | |
| 632 | |
| 633 void generate_v8_lock_epilogue(Register lock_reg, Register lock_ptr_reg, Register yield_reg, Label& retry, Label& dontyield, Register mark_oop_reg = noreg, Register scratch_reg = noreg) { | |
| 634 __ st(lock_reg, lock_ptr_reg, 0); // unlock | |
| 635 } | |
| 636 | |
| 637 // Support for jint Atomic::xchg(jint exchange_value, volatile jint* dest). | |
| 638 // | |
| 639 // Arguments : | |
| 640 // | |
| 641 // exchange_value: O0 | |
| 642 // dest: O1 | |
| 643 // | |
| 644 // Results: | |
| 645 // | |
| 646 // O0: the value previously stored in dest | |
| 647 // | |
| 648 address generate_atomic_xchg() { | |
| 649 StubCodeMark mark(this, "StubRoutines", "atomic_xchg"); | |
| 650 address start = __ pc(); | |
| 651 | |
| 652 if (UseCASForSwap) { | |
| 653 // Use CAS instead of swap, just in case the MP hardware | |
| 654 // prefers to work with just one kind of synch. instruction. | |
| 655 Label retry; | |
| 656 __ BIND(retry); | |
| 657 __ mov(O0, O3); // scratch copy of exchange value | |
| 658 __ ld(O1, 0, O2); // observe the previous value | |
| 659 // try to replace O2 with O3 | |
| 660 __ cas_under_lock(O1, O2, O3, | |
| 661 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(),false); | |
| 662 __ cmp(O2, O3); | |
| 663 __ br(Assembler::notEqual, false, Assembler::pn, retry); | |
| 664 __ delayed()->nop(); | |
| 665 | |
| 666 __ retl(false); | |
| 667 __ delayed()->mov(O2, O0); // report previous value to caller | |
| 668 | |
| 669 } else { | |
| 670 if (VM_Version::v9_instructions_work()) { | |
| 671 __ retl(false); | |
| 672 __ delayed()->swap(O1, 0, O0); | |
| 673 } else { | |
| 674 const Register& lock_reg = O2; | |
| 675 const Register& lock_ptr_reg = O3; | |
| 676 const Register& yield_reg = O4; | |
| 677 | |
| 678 Label retry; | |
| 679 Label dontyield; | |
| 680 | |
| 681 generate_v8_lock_prologue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
| 682 // got the lock, do the swap | |
| 683 __ swap(O1, 0, O0); | |
| 684 | |
| 685 generate_v8_lock_epilogue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
| 686 __ retl(false); | |
| 687 __ delayed()->nop(); | |
| 688 } | |
| 689 } | |
| 690 | |
| 691 return start; | |
| 692 } | |
| 693 | |
| 694 | |
| 695 // Support for jint Atomic::cmpxchg(jint exchange_value, volatile jint* dest, jint compare_value) | |
| 696 // | |
| 697 // Arguments : | |
| 698 // | |
| 699 // exchange_value: O0 | |
| 700 // dest: O1 | |
| 701 // compare_value: O2 | |
| 702 // | |
| 703 // Results: | |
| 704 // | |
| 705 // O0: the value previously stored in dest | |
| 706 // | |
| 707 // Overwrites (v8): O3,O4,O5 | |
| 708 // | |
| 709 address generate_atomic_cmpxchg() { | |
| 710 StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg"); | |
| 711 address start = __ pc(); | |
| 712 | |
| 713 // cmpxchg(dest, compare_value, exchange_value) | |
| 714 __ cas_under_lock(O1, O2, O0, | |
| 715 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr(),false); | |
| 716 __ retl(false); | |
| 717 __ delayed()->nop(); | |
| 718 | |
| 719 return start; | |
| 720 } | |
| 721 | |
| 722 // Support for jlong Atomic::cmpxchg(jlong exchange_value, volatile jlong *dest, jlong compare_value) | |
| 723 // | |
| 724 // Arguments : | |
| 725 // | |
| 726 // exchange_value: O1:O0 | |
| 727 // dest: O2 | |
| 728 // compare_value: O4:O3 | |
| 729 // | |
| 730 // Results: | |
| 731 // | |
| 732 // O1:O0: the value previously stored in dest | |
| 733 // | |
| 734 // This only works on V9, on V8 we don't generate any | |
| 735 // code and just return NULL. | |
| 736 // | |
| 737 // Overwrites: G1,G2,G3 | |
| 738 // | |
| 739 address generate_atomic_cmpxchg_long() { | |
| 740 StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg_long"); | |
| 741 address start = __ pc(); | |
| 742 | |
| 743 if (!VM_Version::supports_cx8()) | |
| 744 return NULL;; | |
| 745 __ sllx(O0, 32, O0); | |
| 746 __ srl(O1, 0, O1); | |
| 747 __ or3(O0,O1,O0); // O0 holds 64-bit value from compare_value | |
| 748 __ sllx(O3, 32, O3); | |
| 749 __ srl(O4, 0, O4); | |
| 750 __ or3(O3,O4,O3); // O3 holds 64-bit value from exchange_value | |
| 751 __ casx(O2, O3, O0); | |
| 752 __ srl(O0, 0, O1); // unpacked return value in O1:O0 | |
| 753 __ retl(false); | |
| 754 __ delayed()->srlx(O0, 32, O0); | |
| 755 | |
| 756 return start; | |
| 757 } | |
| 758 | |
| 759 | |
| 760 // Support for jint Atomic::add(jint add_value, volatile jint* dest). | |
| 761 // | |
| 762 // Arguments : | |
| 763 // | |
| 764 // add_value: O0 (e.g., +1 or -1) | |
| 765 // dest: O1 | |
| 766 // | |
| 767 // Results: | |
| 768 // | |
| 769 // O0: the new value stored in dest | |
| 770 // | |
| 771 // Overwrites (v9): O3 | |
| 772 // Overwrites (v8): O3,O4,O5 | |
| 773 // | |
| 774 address generate_atomic_add() { | |
| 775 StubCodeMark mark(this, "StubRoutines", "atomic_add"); | |
| 776 address start = __ pc(); | |
| 777 __ BIND(_atomic_add_stub); | |
| 778 | |
| 779 if (VM_Version::v9_instructions_work()) { | |
| 780 Label(retry); | |
| 781 __ BIND(retry); | |
| 782 | |
| 783 __ lduw(O1, 0, O2); | |
| 784 __ add(O0, O2, O3); | |
| 785 __ cas(O1, O2, O3); | |
| 786 __ cmp( O2, O3); | |
| 787 __ br(Assembler::notEqual, false, Assembler::pn, retry); | |
| 788 __ delayed()->nop(); | |
| 789 __ retl(false); | |
| 790 __ delayed()->add(O0, O2, O0); // note that cas made O2==O3 | |
| 791 } else { | |
| 792 const Register& lock_reg = O2; | |
| 793 const Register& lock_ptr_reg = O3; | |
| 794 const Register& value_reg = O4; | |
| 795 const Register& yield_reg = O5; | |
| 796 | |
| 797 Label(retry); | |
| 798 Label(dontyield); | |
| 799 | |
| 800 generate_v8_lock_prologue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
| 801 // got lock, do the increment | |
| 802 __ ld(O1, 0, value_reg); | |
| 803 __ add(O0, value_reg, value_reg); | |
| 804 __ st(value_reg, O1, 0); | |
| 805 | |
| 806 // %%% only for RMO and PSO | |
| 807 __ membar(Assembler::StoreStore); | |
| 808 | |
| 809 generate_v8_lock_epilogue(lock_reg, lock_ptr_reg, yield_reg, retry, dontyield); | |
| 810 | |
| 811 __ retl(false); | |
| 812 __ delayed()->mov(value_reg, O0); | |
| 813 } | |
| 814 | |
| 815 return start; | |
| 816 } | |
| 817 Label _atomic_add_stub; // called from other stubs | |
| 818 | |
| 819 | |
| 820 // Support for void OrderAccess::fence(). | |
| 821 // | |
| 822 address generate_fence() { | |
| 823 StubCodeMark mark(this, "StubRoutines", "fence"); | |
| 824 address start = __ pc(); | |
| 825 | |
| 826 __ membar(Assembler::Membar_mask_bits(Assembler::LoadLoad | Assembler::LoadStore | | |
| 827 Assembler::StoreLoad | Assembler::StoreStore)); | |
| 828 __ retl(false); | |
| 829 __ delayed()->nop(); | |
| 830 | |
| 831 return start; | |
| 832 } | |
| 833 | |
| 834 | |
| 835 //------------------------------------------------------------------------------------------------------------------------ | |
| 836 // The following routine generates a subroutine to throw an asynchronous | |
| 837 // UnknownError when an unsafe access gets a fault that could not be | |
| 838 // reasonably prevented by the programmer. (Example: SIGBUS/OBJERR.) | |
| 839 // | |
| 840 // Arguments : | |
| 841 // | |
| 842 // trapping PC: O7 | |
| 843 // | |
| 844 // Results: | |
| 845 // posts an asynchronous exception, skips the trapping instruction | |
| 846 // | |
| 847 | |
| 848 address generate_handler_for_unsafe_access() { | |
| 849 StubCodeMark mark(this, "StubRoutines", "handler_for_unsafe_access"); | |
| 850 address start = __ pc(); | |
| 851 | |
| 852 const int preserve_register_words = (64 * 2); | |
| 853 Address preserve_addr(FP, 0, (-preserve_register_words * wordSize) + STACK_BIAS); | |
| 854 | |
| 855 Register Lthread = L7_thread_cache; | |
| 856 int i; | |
| 857 | |
| 858 __ save_frame(0); | |
| 859 __ mov(G1, L1); | |
| 860 __ mov(G2, L2); | |
| 861 __ mov(G3, L3); | |
| 862 __ mov(G4, L4); | |
| 863 __ mov(G5, L5); | |
| 864 for (i = 0; i < (VM_Version::v9_instructions_work() ? 64 : 32); i += 2) { | |
| 865 __ stf(FloatRegisterImpl::D, as_FloatRegister(i), preserve_addr, i * wordSize); | |
| 866 } | |
| 867 | |
| 868 address entry_point = CAST_FROM_FN_PTR(address, handle_unsafe_access); | |
| 869 BLOCK_COMMENT("call handle_unsafe_access"); | |
| 870 __ call(entry_point, relocInfo::runtime_call_type); | |
| 871 __ delayed()->nop(); | |
| 872 | |
| 873 __ mov(L1, G1); | |
| 874 __ mov(L2, G2); | |
| 875 __ mov(L3, G3); | |
| 876 __ mov(L4, G4); | |
| 877 __ mov(L5, G5); | |
| 878 for (i = 0; i < (VM_Version::v9_instructions_work() ? 64 : 32); i += 2) { | |
| 879 __ ldf(FloatRegisterImpl::D, preserve_addr, as_FloatRegister(i), i * wordSize); | |
| 880 } | |
| 881 | |
| 882 __ verify_thread(); | |
| 883 | |
| 884 __ jmp(O0, 0); | |
| 885 __ delayed()->restore(); | |
| 886 | |
| 887 return start; | |
| 888 } | |
| 889 | |
| 890 | |
| 891 // Support for uint StubRoutine::Sparc::partial_subtype_check( Klass sub, Klass super ); | |
| 892 // Arguments : | |
| 893 // | |
| 894 // ret : O0, returned | |
| 895 // icc/xcc: set as O0 (depending on wordSize) | |
| 896 // sub : O1, argument, not changed | |
| 897 // super: O2, argument, not changed | |
| 898 // raddr: O7, blown by call | |
| 899 address generate_partial_subtype_check() { | |
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900 __ align(CodeEntryAlignment); |
| 0 | 901 StubCodeMark mark(this, "StubRoutines", "partial_subtype_check"); |
| 902 address start = __ pc(); | |
| 903 Label loop, miss; | |
| 904 | |
| 905 // Compare super with sub directly, since super is not in its own SSA. | |
| 906 // The compiler used to emit this test, but we fold it in here, | |
| 907 // to increase overall code density, with no real loss of speed. | |
| 908 { Label L; | |
| 909 __ cmp(O1, O2); | |
| 910 __ brx(Assembler::notEqual, false, Assembler::pt, L); | |
| 911 __ delayed()->nop(); | |
| 912 __ retl(); | |
| 913 __ delayed()->addcc(G0,0,O0); // set Z flags, zero result | |
| 914 __ bind(L); | |
| 915 } | |
| 916 | |
| 917 #if defined(COMPILER2) && !defined(_LP64) | |
| 918 // Do not use a 'save' because it blows the 64-bit O registers. | |
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919 __ add(SP,-4*wordSize,SP); // Make space for 4 temps (stack must be 2 words aligned) |
| 0 | 920 __ st_ptr(L0,SP,(frame::register_save_words+0)*wordSize); |
| 921 __ st_ptr(L1,SP,(frame::register_save_words+1)*wordSize); | |
| 922 __ st_ptr(L2,SP,(frame::register_save_words+2)*wordSize); | |
| 923 __ st_ptr(L3,SP,(frame::register_save_words+3)*wordSize); | |
| 924 Register Rret = O0; | |
| 925 Register Rsub = O1; | |
| 926 Register Rsuper = O2; | |
| 927 #else | |
| 928 __ save_frame(0); | |
| 929 Register Rret = I0; | |
| 930 Register Rsub = I1; | |
| 931 Register Rsuper = I2; | |
| 932 #endif | |
| 933 | |
| 934 Register L0_ary_len = L0; | |
| 935 Register L1_ary_ptr = L1; | |
| 936 Register L2_super = L2; | |
| 937 Register L3_index = L3; | |
| 938 | |
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939 #ifdef _LP64 |
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940 Register L4_ooptmp = L4; |
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941 |
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942 if (UseCompressedOops) { |
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943 // this must be under UseCompressedOops check, as we rely upon fact |
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944 // that L4 not clobbered in C2 on 32-bit platforms, where we do explicit save |
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945 // on stack, see several lines above |
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946 __ encode_heap_oop(Rsuper, L4_ooptmp); |
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947 } |
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948 #endif |
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949 |
| 0 | 950 inc_counter_np(SharedRuntime::_partial_subtype_ctr, L0, L1); |
| 951 | |
| 952 __ ld_ptr( Rsub, sizeof(oopDesc) + Klass::secondary_supers_offset_in_bytes(), L3 ); | |
| 953 __ lduw(L3,arrayOopDesc::length_offset_in_bytes(),L0_ary_len); | |
| 954 __ add(L3,arrayOopDesc::base_offset_in_bytes(T_OBJECT),L1_ary_ptr); | |
| 955 __ clr(L3_index); // zero index | |
| 956 // Load a little early; will load 1 off the end of the array. | |
| 957 // Ok for now; revisit if we have other uses of this routine. | |
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958 if (UseCompressedOops) { |
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959 __ ld(L1_ary_ptr,0,L2_super);// Will load a little early |
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960 } else { |
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961 __ ld_ptr(L1_ary_ptr,0,L2_super);// Will load a little early |
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962 } |
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963 |
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964 assert(heapOopSize != 0, "heapOopSize should be initialized"); |
| 0 | 965 // The scan loop |
| 966 __ BIND(loop); | |
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967 __ add(L1_ary_ptr, heapOopSize, L1_ary_ptr); // Bump by OOP size |
| 0 | 968 __ cmp(L3_index,L0_ary_len); |
| 969 __ br(Assembler::equal,false,Assembler::pn,miss); | |
| 970 __ delayed()->inc(L3_index); // Bump index | |
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971 |
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972 if (UseCompressedOops) { |
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973 #ifdef _LP64 |
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974 __ subcc(L2_super,L4_ooptmp,Rret); // Check for match; zero in Rret for a hit |
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975 __ br( Assembler::notEqual, false, Assembler::pt, loop ); |
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976 __ delayed()->ld(L1_ary_ptr,0,L2_super);// Will load a little early |
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977 #else |
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978 ShouldNotReachHere(); |
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979 #endif |
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980 } else { |
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981 __ subcc(L2_super,Rsuper,Rret); // Check for match; zero in Rret for a hit |
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982 __ brx( Assembler::notEqual, false, Assembler::pt, loop ); |
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983 __ delayed()->ld_ptr(L1_ary_ptr,0,L2_super);// Will load a little early |
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984 } |
| 0 | 985 |
| 986 // Got a hit; report success; set cache. Cache load doesn't | |
| 987 // happen here; for speed it is directly emitted by the compiler. | |
| 988 __ st_ptr( Rsuper, Rsub, sizeof(oopDesc) + Klass::secondary_super_cache_offset_in_bytes() ); | |
| 989 | |
| 990 #if defined(COMPILER2) && !defined(_LP64) | |
| 991 __ ld_ptr(SP,(frame::register_save_words+0)*wordSize,L0); | |
| 992 __ ld_ptr(SP,(frame::register_save_words+1)*wordSize,L1); | |
| 993 __ ld_ptr(SP,(frame::register_save_words+2)*wordSize,L2); | |
| 994 __ ld_ptr(SP,(frame::register_save_words+3)*wordSize,L3); | |
| 995 __ retl(); // Result in Rret is zero; flags set to Z | |
| 996 __ delayed()->add(SP,4*wordSize,SP); | |
| 997 #else | |
| 998 __ ret(); // Result in Rret is zero; flags set to Z | |
| 999 __ delayed()->restore(); | |
| 1000 #endif | |
| 1001 | |
| 1002 // Hit or miss falls through here | |
| 1003 __ BIND(miss); | |
| 1004 __ addcc(G0,1,Rret); // set NZ flags, NZ result | |
| 1005 | |
| 1006 #if defined(COMPILER2) && !defined(_LP64) | |
| 1007 __ ld_ptr(SP,(frame::register_save_words+0)*wordSize,L0); | |
| 1008 __ ld_ptr(SP,(frame::register_save_words+1)*wordSize,L1); | |
| 1009 __ ld_ptr(SP,(frame::register_save_words+2)*wordSize,L2); | |
| 1010 __ ld_ptr(SP,(frame::register_save_words+3)*wordSize,L3); | |
| 1011 __ retl(); // Result in Rret is != 0; flags set to NZ | |
| 1012 __ delayed()->add(SP,4*wordSize,SP); | |
| 1013 #else | |
| 1014 __ ret(); // Result in Rret is != 0; flags set to NZ | |
| 1015 __ delayed()->restore(); | |
| 1016 #endif | |
| 1017 | |
| 1018 return start; | |
| 1019 } | |
| 1020 | |
| 1021 | |
| 1022 // Called from MacroAssembler::verify_oop | |
| 1023 // | |
| 1024 address generate_verify_oop_subroutine() { | |
| 1025 StubCodeMark mark(this, "StubRoutines", "verify_oop_stub"); | |
| 1026 | |
| 1027 address start = __ pc(); | |
| 1028 | |
| 1029 __ verify_oop_subroutine(); | |
| 1030 | |
| 1031 return start; | |
| 1032 } | |
| 1033 | |
| 1034 static address disjoint_byte_copy_entry; | |
| 1035 static address disjoint_short_copy_entry; | |
| 1036 static address disjoint_int_copy_entry; | |
| 1037 static address disjoint_long_copy_entry; | |
| 1038 static address disjoint_oop_copy_entry; | |
| 1039 | |
| 1040 static address byte_copy_entry; | |
| 1041 static address short_copy_entry; | |
| 1042 static address int_copy_entry; | |
| 1043 static address long_copy_entry; | |
| 1044 static address oop_copy_entry; | |
| 1045 | |
| 1046 static address checkcast_copy_entry; | |
| 1047 | |
| 1048 // | |
| 1049 // Verify that a register contains clean 32-bits positive value | |
| 1050 // (high 32-bits are 0) so it could be used in 64-bits shifts (sllx, srax). | |
| 1051 // | |
| 1052 // Input: | |
| 1053 // Rint - 32-bits value | |
| 1054 // Rtmp - scratch | |
| 1055 // | |
| 1056 void assert_clean_int(Register Rint, Register Rtmp) { | |
| 1057 #if defined(ASSERT) && defined(_LP64) | |
| 1058 __ signx(Rint, Rtmp); | |
| 1059 __ cmp(Rint, Rtmp); | |
| 1060 __ breakpoint_trap(Assembler::notEqual, Assembler::xcc); | |
| 1061 #endif | |
| 1062 } | |
| 1063 | |
| 1064 // | |
| 1065 // Generate overlap test for array copy stubs | |
| 1066 // | |
| 1067 // Input: | |
| 1068 // O0 - array1 | |
| 1069 // O1 - array2 | |
| 1070 // O2 - element count | |
| 1071 // | |
| 1072 // Kills temps: O3, O4 | |
| 1073 // | |
| 1074 void array_overlap_test(address no_overlap_target, int log2_elem_size) { | |
| 1075 assert(no_overlap_target != NULL, "must be generated"); | |
| 1076 array_overlap_test(no_overlap_target, NULL, log2_elem_size); | |
| 1077 } | |
| 1078 void array_overlap_test(Label& L_no_overlap, int log2_elem_size) { | |
| 1079 array_overlap_test(NULL, &L_no_overlap, log2_elem_size); | |
| 1080 } | |
| 1081 void array_overlap_test(address no_overlap_target, Label* NOLp, int log2_elem_size) { | |
| 1082 const Register from = O0; | |
| 1083 const Register to = O1; | |
| 1084 const Register count = O2; | |
| 1085 const Register to_from = O3; // to - from | |
| 1086 const Register byte_count = O4; // count << log2_elem_size | |
| 1087 | |
| 1088 __ subcc(to, from, to_from); | |
| 1089 __ sll_ptr(count, log2_elem_size, byte_count); | |
| 1090 if (NOLp == NULL) | |
| 1091 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, no_overlap_target); | |
| 1092 else | |
| 1093 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, (*NOLp)); | |
| 1094 __ delayed()->cmp(to_from, byte_count); | |
| 1095 if (NOLp == NULL) | |
| 1096 __ brx(Assembler::greaterEqual, false, Assembler::pt, no_overlap_target); | |
| 1097 else | |
| 1098 __ brx(Assembler::greaterEqual, false, Assembler::pt, (*NOLp)); | |
| 1099 __ delayed()->nop(); | |
| 1100 } | |
| 1101 | |
| 1102 // | |
| 1103 // Generate pre-write barrier for array. | |
| 1104 // | |
| 1105 // Input: | |
| 1106 // addr - register containing starting address | |
| 1107 // count - register containing element count | |
| 1108 // tmp - scratch register | |
| 1109 // | |
| 1110 // The input registers are overwritten. | |
| 1111 // | |
| 1112 void gen_write_ref_array_pre_barrier(Register addr, Register count) { | |
| 1113 #if 0 // G1 only | |
| 1114 BarrierSet* bs = Universe::heap()->barrier_set(); | |
| 1115 if (bs->has_write_ref_pre_barrier()) { | |
| 1116 assert(bs->has_write_ref_array_pre_opt(), | |
| 1117 "Else unsupported barrier set."); | |
| 1118 | |
| 1119 assert(addr->is_global() && count->is_global(), | |
| 1120 "If not, then we have to fix this code to handle more " | |
| 1121 "general cases."); | |
| 1122 // Get some new fresh output registers. | |
| 1123 __ save_frame(0); | |
| 1124 // Save the necessary global regs... will be used after. | |
| 1125 __ mov(addr, L0); | |
| 1126 __ mov(count, L1); | |
| 1127 | |
| 1128 __ mov(addr, O0); | |
| 1129 // Get the count into O1 | |
| 1130 __ call(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_pre)); | |
| 1131 __ delayed()->mov(count, O1); | |
| 1132 __ mov(L0, addr); | |
| 1133 __ mov(L1, count); | |
| 1134 __ restore(); | |
| 1135 } | |
| 1136 #endif // 0 | |
| 1137 } | |
| 1138 // | |
| 1139 // Generate post-write barrier for array. | |
| 1140 // | |
| 1141 // Input: | |
| 1142 // addr - register containing starting address | |
| 1143 // count - register containing element count | |
| 1144 // tmp - scratch register | |
| 1145 // | |
| 1146 // The input registers are overwritten. | |
| 1147 // | |
| 1148 void gen_write_ref_array_post_barrier(Register addr, Register count, | |
| 1149 Register tmp) { | |
| 1150 BarrierSet* bs = Universe::heap()->barrier_set(); | |
| 1151 | |
| 1152 switch (bs->kind()) { | |
| 1153 #if 0 // G1 - only | |
| 1154 case BarrierSet::G1SATBCT: | |
| 1155 case BarrierSet::G1SATBCTLogging: | |
| 1156 { | |
| 1157 assert(addr->is_global() && count->is_global(), | |
| 1158 "If not, then we have to fix this code to handle more " | |
| 1159 "general cases."); | |
| 1160 // Get some new fresh output registers. | |
| 1161 __ save_frame(0); | |
| 1162 __ mov(addr, O0); | |
| 1163 __ call(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_post)); | |
| 1164 __ delayed()->mov(count, O1); | |
| 1165 __ restore(); | |
| 1166 } | |
| 1167 break; | |
| 1168 #endif // 0 G1 - only | |
| 1169 case BarrierSet::CardTableModRef: | |
| 1170 case BarrierSet::CardTableExtension: | |
| 1171 { | |
| 1172 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | |
| 1173 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); | |
| 1174 assert_different_registers(addr, count, tmp); | |
| 1175 | |
| 1176 Label L_loop; | |
| 1177 | |
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1178 __ sll_ptr(count, LogBytesPerHeapOop, count); |
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1179 __ sub(count, BytesPerHeapOop, count); |
| 0 | 1180 __ add(count, addr, count); |
| 1181 // Use two shifts to clear out those low order two bits! (Cannot opt. into 1.) | |
| 1182 __ srl_ptr(addr, CardTableModRefBS::card_shift, addr); | |
| 1183 __ srl_ptr(count, CardTableModRefBS::card_shift, count); | |
| 1184 __ sub(count, addr, count); | |
| 1185 Address rs(tmp, (address)ct->byte_map_base); | |
| 1186 __ load_address(rs); | |
| 1187 __ BIND(L_loop); | |
| 1188 __ stb(G0, rs.base(), addr); | |
| 1189 __ subcc(count, 1, count); | |
| 1190 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
| 1191 __ delayed()->add(addr, 1, addr); | |
| 1192 | |
| 1193 } | |
| 1194 break; | |
| 1195 case BarrierSet::ModRef: | |
| 1196 break; | |
| 1197 default : | |
| 1198 ShouldNotReachHere(); | |
| 1199 | |
| 1200 } | |
| 1201 } | |
| 1202 | |
| 1203 | |
| 1204 // Copy big chunks forward with shift | |
| 1205 // | |
| 1206 // Inputs: | |
| 1207 // from - source arrays | |
| 1208 // to - destination array aligned to 8-bytes | |
| 1209 // count - elements count to copy >= the count equivalent to 16 bytes | |
| 1210 // count_dec - elements count's decrement equivalent to 16 bytes | |
| 1211 // L_copy_bytes - copy exit label | |
| 1212 // | |
| 1213 void copy_16_bytes_forward_with_shift(Register from, Register to, | |
| 1214 Register count, int count_dec, Label& L_copy_bytes) { | |
| 1215 Label L_loop, L_aligned_copy, L_copy_last_bytes; | |
| 1216 | |
| 1217 // if both arrays have the same alignment mod 8, do 8 bytes aligned copy | |
| 1218 __ andcc(from, 7, G1); // misaligned bytes | |
| 1219 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
| 1220 __ delayed()->nop(); | |
| 1221 | |
| 1222 const Register left_shift = G1; // left shift bit counter | |
| 1223 const Register right_shift = G5; // right shift bit counter | |
| 1224 | |
| 1225 __ sll(G1, LogBitsPerByte, left_shift); | |
| 1226 __ mov(64, right_shift); | |
| 1227 __ sub(right_shift, left_shift, right_shift); | |
| 1228 | |
| 1229 // | |
| 1230 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
| 1231 // to form 2 aligned 8-bytes chunks to store. | |
| 1232 // | |
| 1233 __ deccc(count, count_dec); // Pre-decrement 'count' | |
| 1234 __ andn(from, 7, from); // Align address | |
| 1235 __ ldx(from, 0, O3); | |
| 1236 __ inc(from, 8); | |
| 1237 __ align(16); | |
| 1238 __ BIND(L_loop); | |
| 1239 __ ldx(from, 0, O4); | |
| 1240 __ deccc(count, count_dec); // Can we do next iteration after this one? | |
| 1241 __ ldx(from, 8, G4); | |
| 1242 __ inc(to, 16); | |
| 1243 __ inc(from, 16); | |
| 1244 __ sllx(O3, left_shift, O3); | |
| 1245 __ srlx(O4, right_shift, G3); | |
| 1246 __ bset(G3, O3); | |
| 1247 __ stx(O3, to, -16); | |
| 1248 __ sllx(O4, left_shift, O4); | |
| 1249 __ srlx(G4, right_shift, G3); | |
| 1250 __ bset(G3, O4); | |
| 1251 __ stx(O4, to, -8); | |
| 1252 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
| 1253 __ delayed()->mov(G4, O3); | |
| 1254 | |
| 1255 __ inccc(count, count_dec>>1 ); // + 8 bytes | |
| 1256 __ brx(Assembler::negative, true, Assembler::pn, L_copy_last_bytes); | |
| 1257 __ delayed()->inc(count, count_dec>>1); // restore 'count' | |
| 1258 | |
| 1259 // copy 8 bytes, part of them already loaded in O3 | |
| 1260 __ ldx(from, 0, O4); | |
| 1261 __ inc(to, 8); | |
| 1262 __ inc(from, 8); | |
| 1263 __ sllx(O3, left_shift, O3); | |
| 1264 __ srlx(O4, right_shift, G3); | |
| 1265 __ bset(O3, G3); | |
| 1266 __ stx(G3, to, -8); | |
| 1267 | |
| 1268 __ BIND(L_copy_last_bytes); | |
| 1269 __ srl(right_shift, LogBitsPerByte, right_shift); // misaligned bytes | |
| 1270 __ br(Assembler::always, false, Assembler::pt, L_copy_bytes); | |
| 1271 __ delayed()->sub(from, right_shift, from); // restore address | |
| 1272 | |
| 1273 __ BIND(L_aligned_copy); | |
| 1274 } | |
| 1275 | |
| 1276 // Copy big chunks backward with shift | |
| 1277 // | |
| 1278 // Inputs: | |
| 1279 // end_from - source arrays end address | |
| 1280 // end_to - destination array end address aligned to 8-bytes | |
| 1281 // count - elements count to copy >= the count equivalent to 16 bytes | |
| 1282 // count_dec - elements count's decrement equivalent to 16 bytes | |
| 1283 // L_aligned_copy - aligned copy exit label | |
| 1284 // L_copy_bytes - copy exit label | |
| 1285 // | |
| 1286 void copy_16_bytes_backward_with_shift(Register end_from, Register end_to, | |
| 1287 Register count, int count_dec, | |
| 1288 Label& L_aligned_copy, Label& L_copy_bytes) { | |
| 1289 Label L_loop, L_copy_last_bytes; | |
| 1290 | |
| 1291 // if both arrays have the same alignment mod 8, do 8 bytes aligned copy | |
| 1292 __ andcc(end_from, 7, G1); // misaligned bytes | |
| 1293 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
| 1294 __ delayed()->deccc(count, count_dec); // Pre-decrement 'count' | |
| 1295 | |
| 1296 const Register left_shift = G1; // left shift bit counter | |
| 1297 const Register right_shift = G5; // right shift bit counter | |
| 1298 | |
| 1299 __ sll(G1, LogBitsPerByte, left_shift); | |
| 1300 __ mov(64, right_shift); | |
| 1301 __ sub(right_shift, left_shift, right_shift); | |
| 1302 | |
| 1303 // | |
| 1304 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
| 1305 // to form 2 aligned 8-bytes chunks to store. | |
| 1306 // | |
| 1307 __ andn(end_from, 7, end_from); // Align address | |
| 1308 __ ldx(end_from, 0, O3); | |
| 1309 __ align(16); | |
| 1310 __ BIND(L_loop); | |
| 1311 __ ldx(end_from, -8, O4); | |
| 1312 __ deccc(count, count_dec); // Can we do next iteration after this one? | |
| 1313 __ ldx(end_from, -16, G4); | |
| 1314 __ dec(end_to, 16); | |
| 1315 __ dec(end_from, 16); | |
| 1316 __ srlx(O3, right_shift, O3); | |
| 1317 __ sllx(O4, left_shift, G3); | |
| 1318 __ bset(G3, O3); | |
| 1319 __ stx(O3, end_to, 8); | |
| 1320 __ srlx(O4, right_shift, O4); | |
| 1321 __ sllx(G4, left_shift, G3); | |
| 1322 __ bset(G3, O4); | |
| 1323 __ stx(O4, end_to, 0); | |
| 1324 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_loop); | |
| 1325 __ delayed()->mov(G4, O3); | |
| 1326 | |
| 1327 __ inccc(count, count_dec>>1 ); // + 8 bytes | |
| 1328 __ brx(Assembler::negative, true, Assembler::pn, L_copy_last_bytes); | |
| 1329 __ delayed()->inc(count, count_dec>>1); // restore 'count' | |
| 1330 | |
| 1331 // copy 8 bytes, part of them already loaded in O3 | |
| 1332 __ ldx(end_from, -8, O4); | |
| 1333 __ dec(end_to, 8); | |
| 1334 __ dec(end_from, 8); | |
| 1335 __ srlx(O3, right_shift, O3); | |
| 1336 __ sllx(O4, left_shift, G3); | |
| 1337 __ bset(O3, G3); | |
| 1338 __ stx(G3, end_to, 0); | |
| 1339 | |
| 1340 __ BIND(L_copy_last_bytes); | |
| 1341 __ srl(left_shift, LogBitsPerByte, left_shift); // misaligned bytes | |
| 1342 __ br(Assembler::always, false, Assembler::pt, L_copy_bytes); | |
| 1343 __ delayed()->add(end_from, left_shift, end_from); // restore address | |
| 1344 } | |
| 1345 | |
| 1346 // | |
| 1347 // Generate stub for disjoint byte copy. If "aligned" is true, the | |
| 1348 // "from" and "to" addresses are assumed to be heapword aligned. | |
| 1349 // | |
| 1350 // Arguments for generated stub: | |
| 1351 // from: O0 | |
| 1352 // to: O1 | |
| 1353 // count: O2 treated as signed | |
| 1354 // | |
| 1355 address generate_disjoint_byte_copy(bool aligned, const char * name) { | |
| 1356 __ align(CodeEntryAlignment); | |
| 1357 StubCodeMark mark(this, "StubRoutines", name); | |
| 1358 address start = __ pc(); | |
| 1359 | |
| 1360 Label L_skip_alignment, L_align; | |
| 1361 Label L_copy_byte, L_copy_byte_loop, L_exit; | |
| 1362 | |
| 1363 const Register from = O0; // source array address | |
| 1364 const Register to = O1; // destination array address | |
| 1365 const Register count = O2; // elements count | |
| 1366 const Register offset = O5; // offset from start of arrays | |
| 1367 // O3, O4, G3, G4 are used as temp registers | |
| 1368 | |
| 1369 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
| 1370 | |
| 1371 if (!aligned) disjoint_byte_copy_entry = __ pc(); | |
| 1372 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
| 1373 if (!aligned) BLOCK_COMMENT("Entry:"); | |
| 1374 | |
| 1375 // for short arrays, just do single element copy | |
| 1376 __ cmp(count, 23); // 16 + 7 | |
| 1377 __ brx(Assembler::less, false, Assembler::pn, L_copy_byte); | |
| 1378 __ delayed()->mov(G0, offset); | |
| 1379 | |
| 1380 if (aligned) { | |
| 1381 // 'aligned' == true when it is known statically during compilation | |
| 1382 // of this arraycopy call site that both 'from' and 'to' addresses | |
| 1383 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
| 1384 // | |
| 1385 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
| 1386 // and 8 bytes - in 64-bits VM. So we do it only for 32-bits VM | |
| 1387 // | |
| 1388 #ifndef _LP64 | |
| 1389 // copy a 4-bytes word if necessary to align 'to' to 8 bytes | |
| 1390 __ andcc(to, 7, G0); | |
| 1391 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment); | |
| 1392 __ delayed()->ld(from, 0, O3); | |
| 1393 __ inc(from, 4); | |
| 1394 __ inc(to, 4); | |
| 1395 __ dec(count, 4); | |
| 1396 __ st(O3, to, -4); | |
| 1397 __ BIND(L_skip_alignment); | |
| 1398 #endif | |
| 1399 } else { | |
| 1400 // copy bytes to align 'to' on 8 byte boundary | |
| 1401 __ andcc(to, 7, G1); // misaligned bytes | |
| 1402 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
| 1403 __ delayed()->neg(G1); | |
| 1404 __ inc(G1, 8); // bytes need to copy to next 8-bytes alignment | |
| 1405 __ sub(count, G1, count); | |
| 1406 __ BIND(L_align); | |
| 1407 __ ldub(from, 0, O3); | |
| 1408 __ deccc(G1); | |
| 1409 __ inc(from); | |
| 1410 __ stb(O3, to, 0); | |
| 1411 __ br(Assembler::notZero, false, Assembler::pt, L_align); | |
| 1412 __ delayed()->inc(to); | |
| 1413 __ BIND(L_skip_alignment); | |
| 1414 } | |
| 1415 #ifdef _LP64 | |
| 1416 if (!aligned) | |
| 1417 #endif | |
| 1418 { | |
| 1419 // Copy with shift 16 bytes per iteration if arrays do not have | |
| 1420 // the same alignment mod 8, otherwise fall through to the next | |
| 1421 // code for aligned copy. | |
| 1422 // The compare above (count >= 23) guarantes 'count' >= 16 bytes. | |
| 1423 // Also jump over aligned copy after the copy with shift completed. | |
| 1424 | |
| 1425 copy_16_bytes_forward_with_shift(from, to, count, 16, L_copy_byte); | |
| 1426 } | |
| 1427 | |
| 1428 // Both array are 8 bytes aligned, copy 16 bytes at a time | |
| 1429 __ and3(count, 7, G4); // Save count | |
| 1430 __ srl(count, 3, count); | |
| 1431 generate_disjoint_long_copy_core(aligned); | |
| 1432 __ mov(G4, count); // Restore count | |
| 1433 | |
| 1434 // copy tailing bytes | |
| 1435 __ BIND(L_copy_byte); | |
| 1436 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
| 1437 __ delayed()->nop(); | |
| 1438 __ align(16); | |
| 1439 __ BIND(L_copy_byte_loop); | |
| 1440 __ ldub(from, offset, O3); | |
| 1441 __ deccc(count); | |
| 1442 __ stb(O3, to, offset); | |
| 1443 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_byte_loop); | |
| 1444 __ delayed()->inc(offset); | |
| 1445 | |
| 1446 __ BIND(L_exit); | |
| 1447 // O3, O4 are used as temp registers | |
| 1448 inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr, O3, O4); | |
| 1449 __ retl(); | |
| 1450 __ delayed()->mov(G0, O0); // return 0 | |
| 1451 return start; | |
| 1452 } | |
| 1453 | |
| 1454 // | |
| 1455 // Generate stub for conjoint byte copy. If "aligned" is true, the | |
| 1456 // "from" and "to" addresses are assumed to be heapword aligned. | |
| 1457 // | |
| 1458 // Arguments for generated stub: | |
| 1459 // from: O0 | |
| 1460 // to: O1 | |
| 1461 // count: O2 treated as signed | |
| 1462 // | |
| 1463 address generate_conjoint_byte_copy(bool aligned, const char * name) { | |
| 1464 // Do reverse copy. | |
| 1465 | |
| 1466 __ align(CodeEntryAlignment); | |
| 1467 StubCodeMark mark(this, "StubRoutines", name); | |
| 1468 address start = __ pc(); | |
| 1469 address nooverlap_target = aligned ? | |
| 1470 StubRoutines::arrayof_jbyte_disjoint_arraycopy() : | |
| 1471 disjoint_byte_copy_entry; | |
| 1472 | |
| 1473 Label L_skip_alignment, L_align, L_aligned_copy; | |
| 1474 Label L_copy_byte, L_copy_byte_loop, L_exit; | |
| 1475 | |
| 1476 const Register from = O0; // source array address | |
| 1477 const Register to = O1; // destination array address | |
| 1478 const Register count = O2; // elements count | |
| 1479 const Register end_from = from; // source array end address | |
| 1480 const Register end_to = to; // destination array end address | |
| 1481 | |
| 1482 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
| 1483 | |
| 1484 if (!aligned) byte_copy_entry = __ pc(); | |
| 1485 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
| 1486 if (!aligned) BLOCK_COMMENT("Entry:"); | |
| 1487 | |
| 1488 array_overlap_test(nooverlap_target, 0); | |
| 1489 | |
| 1490 __ add(to, count, end_to); // offset after last copied element | |
| 1491 | |
| 1492 // for short arrays, just do single element copy | |
| 1493 __ cmp(count, 23); // 16 + 7 | |
| 1494 __ brx(Assembler::less, false, Assembler::pn, L_copy_byte); | |
| 1495 __ delayed()->add(from, count, end_from); | |
| 1496 | |
| 1497 { | |
| 1498 // Align end of arrays since they could be not aligned even | |
| 1499 // when arrays itself are aligned. | |
| 1500 | |
| 1501 // copy bytes to align 'end_to' on 8 byte boundary | |
| 1502 __ andcc(end_to, 7, G1); // misaligned bytes | |
| 1503 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
| 1504 __ delayed()->nop(); | |
| 1505 __ sub(count, G1, count); | |
| 1506 __ BIND(L_align); | |
| 1507 __ dec(end_from); | |
| 1508 __ dec(end_to); | |
| 1509 __ ldub(end_from, 0, O3); | |
| 1510 __ deccc(G1); | |
| 1511 __ brx(Assembler::notZero, false, Assembler::pt, L_align); | |
| 1512 __ delayed()->stb(O3, end_to, 0); | |
| 1513 __ BIND(L_skip_alignment); | |
| 1514 } | |
| 1515 #ifdef _LP64 | |
| 1516 if (aligned) { | |
| 1517 // Both arrays are aligned to 8-bytes in 64-bits VM. | |
| 1518 // The 'count' is decremented in copy_16_bytes_backward_with_shift() | |
| 1519 // in unaligned case. | |
| 1520 __ dec(count, 16); | |
| 1521 } else | |
| 1522 #endif | |
| 1523 { | |
| 1524 // Copy with shift 16 bytes per iteration if arrays do not have | |
| 1525 // the same alignment mod 8, otherwise jump to the next | |
| 1526 // code for aligned copy (and substracting 16 from 'count' before jump). | |
| 1527 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
| 1528 // Also jump over aligned copy after the copy with shift completed. | |
| 1529 | |
| 1530 copy_16_bytes_backward_with_shift(end_from, end_to, count, 16, | |
| 1531 L_aligned_copy, L_copy_byte); | |
| 1532 } | |
| 1533 // copy 4 elements (16 bytes) at a time | |
| 1534 __ align(16); | |
| 1535 __ BIND(L_aligned_copy); | |
| 1536 __ dec(end_from, 16); | |
| 1537 __ ldx(end_from, 8, O3); | |
| 1538 __ ldx(end_from, 0, O4); | |
| 1539 __ dec(end_to, 16); | |
| 1540 __ deccc(count, 16); | |
| 1541 __ stx(O3, end_to, 8); | |
| 1542 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
| 1543 __ delayed()->stx(O4, end_to, 0); | |
| 1544 __ inc(count, 16); | |
| 1545 | |
| 1546 // copy 1 element (2 bytes) at a time | |
| 1547 __ BIND(L_copy_byte); | |
| 1548 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
| 1549 __ delayed()->nop(); | |
| 1550 __ align(16); | |
| 1551 __ BIND(L_copy_byte_loop); | |
| 1552 __ dec(end_from); | |
| 1553 __ dec(end_to); | |
| 1554 __ ldub(end_from, 0, O4); | |
| 1555 __ deccc(count); | |
| 1556 __ brx(Assembler::greater, false, Assembler::pt, L_copy_byte_loop); | |
| 1557 __ delayed()->stb(O4, end_to, 0); | |
| 1558 | |
| 1559 __ BIND(L_exit); | |
| 1560 // O3, O4 are used as temp registers | |
| 1561 inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr, O3, O4); | |
| 1562 __ retl(); | |
| 1563 __ delayed()->mov(G0, O0); // return 0 | |
| 1564 return start; | |
| 1565 } | |
| 1566 | |
| 1567 // | |
| 1568 // Generate stub for disjoint short copy. If "aligned" is true, the | |
| 1569 // "from" and "to" addresses are assumed to be heapword aligned. | |
| 1570 // | |
| 1571 // Arguments for generated stub: | |
| 1572 // from: O0 | |
| 1573 // to: O1 | |
| 1574 // count: O2 treated as signed | |
| 1575 // | |
| 1576 address generate_disjoint_short_copy(bool aligned, const char * name) { | |
| 1577 __ align(CodeEntryAlignment); | |
| 1578 StubCodeMark mark(this, "StubRoutines", name); | |
| 1579 address start = __ pc(); | |
| 1580 | |
| 1581 Label L_skip_alignment, L_skip_alignment2; | |
| 1582 Label L_copy_2_bytes, L_copy_2_bytes_loop, L_exit; | |
| 1583 | |
| 1584 const Register from = O0; // source array address | |
| 1585 const Register to = O1; // destination array address | |
| 1586 const Register count = O2; // elements count | |
| 1587 const Register offset = O5; // offset from start of arrays | |
| 1588 // O3, O4, G3, G4 are used as temp registers | |
| 1589 | |
| 1590 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
| 1591 | |
| 1592 if (!aligned) disjoint_short_copy_entry = __ pc(); | |
| 1593 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
| 1594 if (!aligned) BLOCK_COMMENT("Entry:"); | |
| 1595 | |
| 1596 // for short arrays, just do single element copy | |
| 1597 __ cmp(count, 11); // 8 + 3 (22 bytes) | |
| 1598 __ brx(Assembler::less, false, Assembler::pn, L_copy_2_bytes); | |
| 1599 __ delayed()->mov(G0, offset); | |
| 1600 | |
| 1601 if (aligned) { | |
| 1602 // 'aligned' == true when it is known statically during compilation | |
| 1603 // of this arraycopy call site that both 'from' and 'to' addresses | |
| 1604 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
| 1605 // | |
| 1606 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
| 1607 // and 8 bytes - in 64-bits VM. | |
| 1608 // | |
| 1609 #ifndef _LP64 | |
| 1610 // copy a 2-elements word if necessary to align 'to' to 8 bytes | |
| 1611 __ andcc(to, 7, G0); | |
| 1612 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
| 1613 __ delayed()->ld(from, 0, O3); | |
| 1614 __ inc(from, 4); | |
| 1615 __ inc(to, 4); | |
| 1616 __ dec(count, 2); | |
| 1617 __ st(O3, to, -4); | |
| 1618 __ BIND(L_skip_alignment); | |
| 1619 #endif | |
| 1620 } else { | |
| 1621 // copy 1 element if necessary to align 'to' on an 4 bytes | |
| 1622 __ andcc(to, 3, G0); | |
| 1623 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
| 1624 __ delayed()->lduh(from, 0, O3); | |
| 1625 __ inc(from, 2); | |
| 1626 __ inc(to, 2); | |
| 1627 __ dec(count); | |
| 1628 __ sth(O3, to, -2); | |
| 1629 __ BIND(L_skip_alignment); | |
| 1630 | |
| 1631 // copy 2 elements to align 'to' on an 8 byte boundary | |
| 1632 __ andcc(to, 7, G0); | |
| 1633 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment2); | |
| 1634 __ delayed()->lduh(from, 0, O3); | |
| 1635 __ dec(count, 2); | |
| 1636 __ lduh(from, 2, O4); | |
| 1637 __ inc(from, 4); | |
| 1638 __ inc(to, 4); | |
| 1639 __ sth(O3, to, -4); | |
| 1640 __ sth(O4, to, -2); | |
| 1641 __ BIND(L_skip_alignment2); | |
| 1642 } | |
| 1643 #ifdef _LP64 | |
| 1644 if (!aligned) | |
| 1645 #endif | |
| 1646 { | |
| 1647 // Copy with shift 16 bytes per iteration if arrays do not have | |
| 1648 // the same alignment mod 8, otherwise fall through to the next | |
| 1649 // code for aligned copy. | |
| 1650 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
| 1651 // Also jump over aligned copy after the copy with shift completed. | |
| 1652 | |
| 1653 copy_16_bytes_forward_with_shift(from, to, count, 8, L_copy_2_bytes); | |
| 1654 } | |
| 1655 | |
| 1656 // Both array are 8 bytes aligned, copy 16 bytes at a time | |
| 1657 __ and3(count, 3, G4); // Save | |
| 1658 __ srl(count, 2, count); | |
| 1659 generate_disjoint_long_copy_core(aligned); | |
| 1660 __ mov(G4, count); // restore | |
| 1661 | |
| 1662 // copy 1 element at a time | |
| 1663 __ BIND(L_copy_2_bytes); | |
| 1664 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
| 1665 __ delayed()->nop(); | |
| 1666 __ align(16); | |
| 1667 __ BIND(L_copy_2_bytes_loop); | |
| 1668 __ lduh(from, offset, O3); | |
| 1669 __ deccc(count); | |
| 1670 __ sth(O3, to, offset); | |
| 1671 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_2_bytes_loop); | |
| 1672 __ delayed()->inc(offset, 2); | |
| 1673 | |
| 1674 __ BIND(L_exit); | |
| 1675 // O3, O4 are used as temp registers | |
| 1676 inc_counter_np(SharedRuntime::_jshort_array_copy_ctr, O3, O4); | |
| 1677 __ retl(); | |
| 1678 __ delayed()->mov(G0, O0); // return 0 | |
| 1679 return start; | |
| 1680 } | |
| 1681 | |
| 1682 // | |
| 1683 // Generate stub for conjoint short copy. If "aligned" is true, the | |
| 1684 // "from" and "to" addresses are assumed to be heapword aligned. | |
| 1685 // | |
| 1686 // Arguments for generated stub: | |
| 1687 // from: O0 | |
| 1688 // to: O1 | |
| 1689 // count: O2 treated as signed | |
| 1690 // | |
| 1691 address generate_conjoint_short_copy(bool aligned, const char * name) { | |
| 1692 // Do reverse copy. | |
| 1693 | |
| 1694 __ align(CodeEntryAlignment); | |
| 1695 StubCodeMark mark(this, "StubRoutines", name); | |
| 1696 address start = __ pc(); | |
| 1697 address nooverlap_target = aligned ? | |
| 1698 StubRoutines::arrayof_jshort_disjoint_arraycopy() : | |
| 1699 disjoint_short_copy_entry; | |
| 1700 | |
| 1701 Label L_skip_alignment, L_skip_alignment2, L_aligned_copy; | |
| 1702 Label L_copy_2_bytes, L_copy_2_bytes_loop, L_exit; | |
| 1703 | |
| 1704 const Register from = O0; // source array address | |
| 1705 const Register to = O1; // destination array address | |
| 1706 const Register count = O2; // elements count | |
| 1707 const Register end_from = from; // source array end address | |
| 1708 const Register end_to = to; // destination array end address | |
| 1709 | |
| 1710 const Register byte_count = O3; // bytes count to copy | |
| 1711 | |
| 1712 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
| 1713 | |
| 1714 if (!aligned) short_copy_entry = __ pc(); | |
| 1715 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
| 1716 if (!aligned) BLOCK_COMMENT("Entry:"); | |
| 1717 | |
| 1718 array_overlap_test(nooverlap_target, 1); | |
| 1719 | |
| 1720 __ sllx(count, LogBytesPerShort, byte_count); | |
| 1721 __ add(to, byte_count, end_to); // offset after last copied element | |
| 1722 | |
| 1723 // for short arrays, just do single element copy | |
| 1724 __ cmp(count, 11); // 8 + 3 (22 bytes) | |
| 1725 __ brx(Assembler::less, false, Assembler::pn, L_copy_2_bytes); | |
| 1726 __ delayed()->add(from, byte_count, end_from); | |
| 1727 | |
| 1728 { | |
| 1729 // Align end of arrays since they could be not aligned even | |
| 1730 // when arrays itself are aligned. | |
| 1731 | |
| 1732 // copy 1 element if necessary to align 'end_to' on an 4 bytes | |
| 1733 __ andcc(end_to, 3, G0); | |
| 1734 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
| 1735 __ delayed()->lduh(end_from, -2, O3); | |
| 1736 __ dec(end_from, 2); | |
| 1737 __ dec(end_to, 2); | |
| 1738 __ dec(count); | |
| 1739 __ sth(O3, end_to, 0); | |
| 1740 __ BIND(L_skip_alignment); | |
| 1741 | |
| 1742 // copy 2 elements to align 'end_to' on an 8 byte boundary | |
| 1743 __ andcc(end_to, 7, G0); | |
| 1744 __ br(Assembler::zero, false, Assembler::pn, L_skip_alignment2); | |
| 1745 __ delayed()->lduh(end_from, -2, O3); | |
| 1746 __ dec(count, 2); | |
| 1747 __ lduh(end_from, -4, O4); | |
| 1748 __ dec(end_from, 4); | |
| 1749 __ dec(end_to, 4); | |
| 1750 __ sth(O3, end_to, 2); | |
| 1751 __ sth(O4, end_to, 0); | |
| 1752 __ BIND(L_skip_alignment2); | |
| 1753 } | |
| 1754 #ifdef _LP64 | |
| 1755 if (aligned) { | |
| 1756 // Both arrays are aligned to 8-bytes in 64-bits VM. | |
| 1757 // The 'count' is decremented in copy_16_bytes_backward_with_shift() | |
| 1758 // in unaligned case. | |
| 1759 __ dec(count, 8); | |
| 1760 } else | |
| 1761 #endif | |
| 1762 { | |
| 1763 // Copy with shift 16 bytes per iteration if arrays do not have | |
| 1764 // the same alignment mod 8, otherwise jump to the next | |
| 1765 // code for aligned copy (and substracting 8 from 'count' before jump). | |
| 1766 // The compare above (count >= 11) guarantes 'count' >= 16 bytes. | |
| 1767 // Also jump over aligned copy after the copy with shift completed. | |
| 1768 | |
| 1769 copy_16_bytes_backward_with_shift(end_from, end_to, count, 8, | |
| 1770 L_aligned_copy, L_copy_2_bytes); | |
| 1771 } | |
| 1772 // copy 4 elements (16 bytes) at a time | |
| 1773 __ align(16); | |
| 1774 __ BIND(L_aligned_copy); | |
| 1775 __ dec(end_from, 16); | |
| 1776 __ ldx(end_from, 8, O3); | |
| 1777 __ ldx(end_from, 0, O4); | |
| 1778 __ dec(end_to, 16); | |
| 1779 __ deccc(count, 8); | |
| 1780 __ stx(O3, end_to, 8); | |
| 1781 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
| 1782 __ delayed()->stx(O4, end_to, 0); | |
| 1783 __ inc(count, 8); | |
| 1784 | |
| 1785 // copy 1 element (2 bytes) at a time | |
| 1786 __ BIND(L_copy_2_bytes); | |
| 1787 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
| 1788 __ delayed()->nop(); | |
| 1789 __ BIND(L_copy_2_bytes_loop); | |
| 1790 __ dec(end_from, 2); | |
| 1791 __ dec(end_to, 2); | |
| 1792 __ lduh(end_from, 0, O4); | |
| 1793 __ deccc(count); | |
| 1794 __ brx(Assembler::greater, false, Assembler::pt, L_copy_2_bytes_loop); | |
| 1795 __ delayed()->sth(O4, end_to, 0); | |
| 1796 | |
| 1797 __ BIND(L_exit); | |
| 1798 // O3, O4 are used as temp registers | |
| 1799 inc_counter_np(SharedRuntime::_jshort_array_copy_ctr, O3, O4); | |
| 1800 __ retl(); | |
| 1801 __ delayed()->mov(G0, O0); // return 0 | |
| 1802 return start; | |
| 1803 } | |
| 1804 | |
| 1805 // | |
| 1806 // Generate core code for disjoint int copy (and oop copy on 32-bit). | |
| 1807 // If "aligned" is true, the "from" and "to" addresses are assumed | |
| 1808 // to be heapword aligned. | |
| 1809 // | |
| 1810 // Arguments: | |
| 1811 // from: O0 | |
| 1812 // to: O1 | |
| 1813 // count: O2 treated as signed | |
| 1814 // | |
| 1815 void generate_disjoint_int_copy_core(bool aligned) { | |
| 1816 | |
| 1817 Label L_skip_alignment, L_aligned_copy; | |
| 1818 Label L_copy_16_bytes, L_copy_4_bytes, L_copy_4_bytes_loop, L_exit; | |
| 1819 | |
| 1820 const Register from = O0; // source array address | |
| 1821 const Register to = O1; // destination array address | |
| 1822 const Register count = O2; // elements count | |
| 1823 const Register offset = O5; // offset from start of arrays | |
| 1824 // O3, O4, G3, G4 are used as temp registers | |
| 1825 | |
| 1826 // 'aligned' == true when it is known statically during compilation | |
| 1827 // of this arraycopy call site that both 'from' and 'to' addresses | |
| 1828 // are HeapWordSize aligned (see LibraryCallKit::basictype2arraycopy()). | |
| 1829 // | |
| 1830 // Aligned arrays have 4 bytes alignment in 32-bits VM | |
| 1831 // and 8 bytes - in 64-bits VM. | |
| 1832 // | |
| 1833 #ifdef _LP64 | |
| 1834 if (!aligned) | |
| 1835 #endif | |
| 1836 { | |
| 1837 // The next check could be put under 'ifndef' since the code in | |
| 1838 // generate_disjoint_long_copy_core() has own checks and set 'offset'. | |
| 1839 | |
| 1840 // for short arrays, just do single element copy | |
| 1841 __ cmp(count, 5); // 4 + 1 (20 bytes) | |
| 1842 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_4_bytes); | |
| 1843 __ delayed()->mov(G0, offset); | |
| 1844 | |
| 1845 // copy 1 element to align 'to' on an 8 byte boundary | |
| 1846 __ andcc(to, 7, G0); | |
| 1847 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
| 1848 __ delayed()->ld(from, 0, O3); | |
| 1849 __ inc(from, 4); | |
| 1850 __ inc(to, 4); | |
| 1851 __ dec(count); | |
| 1852 __ st(O3, to, -4); | |
| 1853 __ BIND(L_skip_alignment); | |
| 1854 | |
| 1855 // if arrays have same alignment mod 8, do 4 elements copy | |
| 1856 __ andcc(from, 7, G0); | |
| 1857 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
| 1858 __ delayed()->ld(from, 0, O3); | |
| 1859 | |
| 1860 // | |
| 1861 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
| 1862 // to form 2 aligned 8-bytes chunks to store. | |
| 1863 // | |
| 1864 // copy_16_bytes_forward_with_shift() is not used here since this | |
| 1865 // code is more optimal. | |
| 1866 | |
| 1867 // copy with shift 4 elements (16 bytes) at a time | |
| 1868 __ dec(count, 4); // The cmp at the beginning guaranty count >= 4 | |
| 1869 | |
| 1870 __ align(16); | |
| 1871 __ BIND(L_copy_16_bytes); | |
| 1872 __ ldx(from, 4, O4); | |
| 1873 __ deccc(count, 4); // Can we do next iteration after this one? | |
| 1874 __ ldx(from, 12, G4); | |
| 1875 __ inc(to, 16); | |
| 1876 __ inc(from, 16); | |
| 1877 __ sllx(O3, 32, O3); | |
| 1878 __ srlx(O4, 32, G3); | |
| 1879 __ bset(G3, O3); | |
| 1880 __ stx(O3, to, -16); | |
| 1881 __ sllx(O4, 32, O4); | |
| 1882 __ srlx(G4, 32, G3); | |
| 1883 __ bset(G3, O4); | |
| 1884 __ stx(O4, to, -8); | |
| 1885 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes); | |
| 1886 __ delayed()->mov(G4, O3); | |
| 1887 | |
| 1888 __ br(Assembler::always, false, Assembler::pt, L_copy_4_bytes); | |
| 1889 __ delayed()->inc(count, 4); // restore 'count' | |
| 1890 | |
| 1891 __ BIND(L_aligned_copy); | |
| 1892 } | |
| 1893 // copy 4 elements (16 bytes) at a time | |
| 1894 __ and3(count, 1, G4); // Save | |
| 1895 __ srl(count, 1, count); | |
| 1896 generate_disjoint_long_copy_core(aligned); | |
| 1897 __ mov(G4, count); // Restore | |
| 1898 | |
| 1899 // copy 1 element at a time | |
| 1900 __ BIND(L_copy_4_bytes); | |
| 1901 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
| 1902 __ delayed()->nop(); | |
| 1903 __ BIND(L_copy_4_bytes_loop); | |
| 1904 __ ld(from, offset, O3); | |
| 1905 __ deccc(count); | |
| 1906 __ st(O3, to, offset); | |
| 1907 __ brx(Assembler::notZero, false, Assembler::pt, L_copy_4_bytes_loop); | |
| 1908 __ delayed()->inc(offset, 4); | |
| 1909 __ BIND(L_exit); | |
| 1910 } | |
| 1911 | |
| 1912 // | |
| 1913 // Generate stub for disjoint int copy. If "aligned" is true, the | |
| 1914 // "from" and "to" addresses are assumed to be heapword aligned. | |
| 1915 // | |
| 1916 // Arguments for generated stub: | |
| 1917 // from: O0 | |
| 1918 // to: O1 | |
| 1919 // count: O2 treated as signed | |
| 1920 // | |
| 1921 address generate_disjoint_int_copy(bool aligned, const char * name) { | |
| 1922 __ align(CodeEntryAlignment); | |
| 1923 StubCodeMark mark(this, "StubRoutines", name); | |
| 1924 address start = __ pc(); | |
| 1925 | |
| 1926 const Register count = O2; | |
| 1927 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
| 1928 | |
| 1929 if (!aligned) disjoint_int_copy_entry = __ pc(); | |
| 1930 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
| 1931 if (!aligned) BLOCK_COMMENT("Entry:"); | |
| 1932 | |
| 1933 generate_disjoint_int_copy_core(aligned); | |
| 1934 | |
| 1935 // O3, O4 are used as temp registers | |
| 1936 inc_counter_np(SharedRuntime::_jint_array_copy_ctr, O3, O4); | |
| 1937 __ retl(); | |
| 1938 __ delayed()->mov(G0, O0); // return 0 | |
| 1939 return start; | |
| 1940 } | |
| 1941 | |
| 1942 // | |
| 1943 // Generate core code for conjoint int copy (and oop copy on 32-bit). | |
| 1944 // If "aligned" is true, the "from" and "to" addresses are assumed | |
| 1945 // to be heapword aligned. | |
| 1946 // | |
| 1947 // Arguments: | |
| 1948 // from: O0 | |
| 1949 // to: O1 | |
| 1950 // count: O2 treated as signed | |
| 1951 // | |
| 1952 void generate_conjoint_int_copy_core(bool aligned) { | |
| 1953 // Do reverse copy. | |
| 1954 | |
| 1955 Label L_skip_alignment, L_aligned_copy; | |
| 1956 Label L_copy_16_bytes, L_copy_4_bytes, L_copy_4_bytes_loop, L_exit; | |
| 1957 | |
| 1958 const Register from = O0; // source array address | |
| 1959 const Register to = O1; // destination array address | |
| 1960 const Register count = O2; // elements count | |
| 1961 const Register end_from = from; // source array end address | |
| 1962 const Register end_to = to; // destination array end address | |
| 1963 // O3, O4, O5, G3 are used as temp registers | |
| 1964 | |
| 1965 const Register byte_count = O3; // bytes count to copy | |
| 1966 | |
| 1967 __ sllx(count, LogBytesPerInt, byte_count); | |
| 1968 __ add(to, byte_count, end_to); // offset after last copied element | |
| 1969 | |
| 1970 __ cmp(count, 5); // for short arrays, just do single element copy | |
| 1971 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_4_bytes); | |
| 1972 __ delayed()->add(from, byte_count, end_from); | |
| 1973 | |
| 1974 // copy 1 element to align 'to' on an 8 byte boundary | |
| 1975 __ andcc(end_to, 7, G0); | |
| 1976 __ br(Assembler::zero, false, Assembler::pt, L_skip_alignment); | |
| 1977 __ delayed()->nop(); | |
| 1978 __ dec(count); | |
| 1979 __ dec(end_from, 4); | |
| 1980 __ dec(end_to, 4); | |
| 1981 __ ld(end_from, 0, O4); | |
| 1982 __ st(O4, end_to, 0); | |
| 1983 __ BIND(L_skip_alignment); | |
| 1984 | |
| 1985 // Check if 'end_from' and 'end_to' has the same alignment. | |
| 1986 __ andcc(end_from, 7, G0); | |
| 1987 __ br(Assembler::zero, false, Assembler::pt, L_aligned_copy); | |
| 1988 __ delayed()->dec(count, 4); // The cmp at the start guaranty cnt >= 4 | |
| 1989 | |
| 1990 // copy with shift 4 elements (16 bytes) at a time | |
| 1991 // | |
| 1992 // Load 2 aligned 8-bytes chunks and use one from previous iteration | |
| 1993 // to form 2 aligned 8-bytes chunks to store. | |
| 1994 // | |
| 1995 __ ldx(end_from, -4, O3); | |
| 1996 __ align(16); | |
| 1997 __ BIND(L_copy_16_bytes); | |
| 1998 __ ldx(end_from, -12, O4); | |
| 1999 __ deccc(count, 4); | |
| 2000 __ ldx(end_from, -20, O5); | |
| 2001 __ dec(end_to, 16); | |
| 2002 __ dec(end_from, 16); | |
| 2003 __ srlx(O3, 32, O3); | |
| 2004 __ sllx(O4, 32, G3); | |
| 2005 __ bset(G3, O3); | |
| 2006 __ stx(O3, end_to, 8); | |
| 2007 __ srlx(O4, 32, O4); | |
| 2008 __ sllx(O5, 32, G3); | |
| 2009 __ bset(O4, G3); | |
| 2010 __ stx(G3, end_to, 0); | |
| 2011 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes); | |
| 2012 __ delayed()->mov(O5, O3); | |
| 2013 | |
| 2014 __ br(Assembler::always, false, Assembler::pt, L_copy_4_bytes); | |
| 2015 __ delayed()->inc(count, 4); | |
| 2016 | |
| 2017 // copy 4 elements (16 bytes) at a time | |
| 2018 __ align(16); | |
| 2019 __ BIND(L_aligned_copy); | |
| 2020 __ dec(end_from, 16); | |
| 2021 __ ldx(end_from, 8, O3); | |
| 2022 __ ldx(end_from, 0, O4); | |
| 2023 __ dec(end_to, 16); | |
| 2024 __ deccc(count, 4); | |
| 2025 __ stx(O3, end_to, 8); | |
| 2026 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_aligned_copy); | |
| 2027 __ delayed()->stx(O4, end_to, 0); | |
| 2028 __ inc(count, 4); | |
| 2029 | |
| 2030 // copy 1 element (4 bytes) at a time | |
| 2031 __ BIND(L_copy_4_bytes); | |
| 2032 __ br_zero(Assembler::zero, false, Assembler::pt, count, L_exit); | |
| 2033 __ delayed()->nop(); | |
| 2034 __ BIND(L_copy_4_bytes_loop); | |
| 2035 __ dec(end_from, 4); | |
| 2036 __ dec(end_to, 4); | |
| 2037 __ ld(end_from, 0, O4); | |
| 2038 __ deccc(count); | |
| 2039 __ brx(Assembler::greater, false, Assembler::pt, L_copy_4_bytes_loop); | |
| 2040 __ delayed()->st(O4, end_to, 0); | |
| 2041 __ BIND(L_exit); | |
| 2042 } | |
| 2043 | |
| 2044 // | |
| 2045 // Generate stub for conjoint int copy. If "aligned" is true, the | |
| 2046 // "from" and "to" addresses are assumed to be heapword aligned. | |
| 2047 // | |
| 2048 // Arguments for generated stub: | |
| 2049 // from: O0 | |
| 2050 // to: O1 | |
| 2051 // count: O2 treated as signed | |
| 2052 // | |
| 2053 address generate_conjoint_int_copy(bool aligned, const char * name) { | |
| 2054 __ align(CodeEntryAlignment); | |
| 2055 StubCodeMark mark(this, "StubRoutines", name); | |
| 2056 address start = __ pc(); | |
| 2057 | |
| 2058 address nooverlap_target = aligned ? | |
| 2059 StubRoutines::arrayof_jint_disjoint_arraycopy() : | |
| 2060 disjoint_int_copy_entry; | |
| 2061 | |
| 2062 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
| 2063 | |
| 2064 if (!aligned) int_copy_entry = __ pc(); | |
| 2065 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
| 2066 if (!aligned) BLOCK_COMMENT("Entry:"); | |
| 2067 | |
| 2068 array_overlap_test(nooverlap_target, 2); | |
| 2069 | |
| 2070 generate_conjoint_int_copy_core(aligned); | |
| 2071 | |
| 2072 // O3, O4 are used as temp registers | |
| 2073 inc_counter_np(SharedRuntime::_jint_array_copy_ctr, O3, O4); | |
| 2074 __ retl(); | |
| 2075 __ delayed()->mov(G0, O0); // return 0 | |
| 2076 return start; | |
| 2077 } | |
| 2078 | |
| 2079 // | |
| 2080 // Generate core code for disjoint long copy (and oop copy on 64-bit). | |
| 2081 // "aligned" is ignored, because we must make the stronger | |
| 2082 // assumption that both addresses are always 64-bit aligned. | |
| 2083 // | |
| 2084 // Arguments: | |
| 2085 // from: O0 | |
| 2086 // to: O1 | |
| 2087 // count: O2 treated as signed | |
| 2088 // | |
| 2089 void generate_disjoint_long_copy_core(bool aligned) { | |
| 2090 Label L_copy_8_bytes, L_copy_16_bytes, L_exit; | |
| 2091 const Register from = O0; // source array address | |
| 2092 const Register to = O1; // destination array address | |
| 2093 const Register count = O2; // elements count | |
| 2094 const Register offset0 = O4; // element offset | |
| 2095 const Register offset8 = O5; // next element offset | |
| 2096 | |
| 2097 __ deccc(count, 2); | |
| 2098 __ mov(G0, offset0); // offset from start of arrays (0) | |
| 2099 __ brx(Assembler::negative, false, Assembler::pn, L_copy_8_bytes ); | |
| 2100 __ delayed()->add(offset0, 8, offset8); | |
| 2101 __ align(16); | |
| 2102 __ BIND(L_copy_16_bytes); | |
| 2103 __ ldx(from, offset0, O3); | |
| 2104 __ ldx(from, offset8, G3); | |
| 2105 __ deccc(count, 2); | |
| 2106 __ stx(O3, to, offset0); | |
| 2107 __ inc(offset0, 16); | |
| 2108 __ stx(G3, to, offset8); | |
| 2109 __ brx(Assembler::greaterEqual, false, Assembler::pt, L_copy_16_bytes); | |
| 2110 __ delayed()->inc(offset8, 16); | |
| 2111 | |
| 2112 __ BIND(L_copy_8_bytes); | |
| 2113 __ inccc(count, 2); | |
| 2114 __ brx(Assembler::zero, true, Assembler::pn, L_exit ); | |
| 2115 __ delayed()->mov(offset0, offset8); // Set O5 used by other stubs | |
| 2116 __ ldx(from, offset0, O3); | |
| 2117 __ stx(O3, to, offset0); | |
| 2118 __ BIND(L_exit); | |
| 2119 } | |
| 2120 | |
| 2121 // | |
| 2122 // Generate stub for disjoint long copy. | |
| 2123 // "aligned" is ignored, because we must make the stronger | |
| 2124 // assumption that both addresses are always 64-bit aligned. | |
| 2125 // | |
| 2126 // Arguments for generated stub: | |
| 2127 // from: O0 | |
| 2128 // to: O1 | |
| 2129 // count: O2 treated as signed | |
| 2130 // | |
| 2131 address generate_disjoint_long_copy(bool aligned, const char * name) { | |
| 2132 __ align(CodeEntryAlignment); | |
| 2133 StubCodeMark mark(this, "StubRoutines", name); | |
| 2134 address start = __ pc(); | |
| 2135 | |
| 2136 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
| 2137 | |
| 2138 if (!aligned) disjoint_long_copy_entry = __ pc(); | |
| 2139 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
| 2140 if (!aligned) BLOCK_COMMENT("Entry:"); | |
| 2141 | |
| 2142 generate_disjoint_long_copy_core(aligned); | |
| 2143 | |
| 2144 // O3, O4 are used as temp registers | |
| 2145 inc_counter_np(SharedRuntime::_jlong_array_copy_ctr, O3, O4); | |
| 2146 __ retl(); | |
| 2147 __ delayed()->mov(G0, O0); // return 0 | |
| 2148 return start; | |
| 2149 } | |
| 2150 | |
| 2151 // | |
| 2152 // Generate core code for conjoint long copy (and oop copy on 64-bit). | |
| 2153 // "aligned" is ignored, because we must make the stronger | |
| 2154 // assumption that both addresses are always 64-bit aligned. | |
| 2155 // | |
| 2156 // Arguments: | |
| 2157 // from: O0 | |
| 2158 // to: O1 | |
| 2159 // count: O2 treated as signed | |
| 2160 // | |
| 2161 void generate_conjoint_long_copy_core(bool aligned) { | |
| 2162 // Do reverse copy. | |
| 2163 Label L_copy_8_bytes, L_copy_16_bytes, L_exit; | |
| 2164 const Register from = O0; // source array address | |
| 2165 const Register to = O1; // destination array address | |
| 2166 const Register count = O2; // elements count | |
| 2167 const Register offset8 = O4; // element offset | |
| 2168 const Register offset0 = O5; // previous element offset | |
| 2169 | |
| 2170 __ subcc(count, 1, count); | |
| 2171 __ brx(Assembler::lessEqual, false, Assembler::pn, L_copy_8_bytes ); | |
| 2172 __ delayed()->sllx(count, LogBytesPerLong, offset8); | |
| 2173 __ sub(offset8, 8, offset0); | |
| 2174 __ align(16); | |
| 2175 __ BIND(L_copy_16_bytes); | |
| 2176 __ ldx(from, offset8, O2); | |
| 2177 __ ldx(from, offset0, O3); | |
| 2178 __ stx(O2, to, offset8); | |
| 2179 __ deccc(offset8, 16); // use offset8 as counter | |
| 2180 __ stx(O3, to, offset0); | |
| 2181 __ brx(Assembler::greater, false, Assembler::pt, L_copy_16_bytes); | |
| 2182 __ delayed()->dec(offset0, 16); | |
| 2183 | |
| 2184 __ BIND(L_copy_8_bytes); | |
| 2185 __ brx(Assembler::negative, false, Assembler::pn, L_exit ); | |
| 2186 __ delayed()->nop(); | |
| 2187 __ ldx(from, 0, O3); | |
| 2188 __ stx(O3, to, 0); | |
| 2189 __ BIND(L_exit); | |
| 2190 } | |
| 2191 | |
| 2192 // Generate stub for conjoint long copy. | |
| 2193 // "aligned" is ignored, because we must make the stronger | |
| 2194 // assumption that both addresses are always 64-bit aligned. | |
| 2195 // | |
| 2196 // Arguments for generated stub: | |
| 2197 // from: O0 | |
| 2198 // to: O1 | |
| 2199 // count: O2 treated as signed | |
| 2200 // | |
| 2201 address generate_conjoint_long_copy(bool aligned, const char * name) { | |
| 2202 __ align(CodeEntryAlignment); | |
| 2203 StubCodeMark mark(this, "StubRoutines", name); | |
| 2204 address start = __ pc(); | |
| 2205 | |
| 2206 assert(!aligned, "usage"); | |
| 2207 address nooverlap_target = disjoint_long_copy_entry; | |
| 2208 | |
| 2209 assert_clean_int(O2, O3); // Make sure 'count' is clean int. | |
| 2210 | |
| 2211 if (!aligned) long_copy_entry = __ pc(); | |
| 2212 // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) | |
| 2213 if (!aligned) BLOCK_COMMENT("Entry:"); | |
| 2214 | |
| 2215 array_overlap_test(nooverlap_target, 3); | |
| 2216 | |
| 2217 generate_conjoint_long_copy_core(aligned); | |
| 2218 | |
| 2219 // O3, O4 are used as temp registers | |
| 2220 inc_counter_np(SharedRuntime::_jlong_array_copy_ctr, O3, O4); | |
| 2221 __ retl(); | |
| 2222 __ delayed()->mov(G0, O0); // return 0 | |
| 2223 return start; | |
| 2224 } | |
| 2225 | |
| 2226 // Generate stub for disjoint oop copy. If "aligned" is true, the | |
| 2227 // "from" and "to" addresses are assumed to be heapword aligned. | |
| 2228 // | |
| 2229 // Arguments for generated stub: | |
| 2230 // from: O0 | |
| 2231 // to: O1 | |
| 2232 // count: O2 treated as signed | |
| 2233 // | |
| 2234 address generate_disjoint_oop_copy(bool aligned, const char * name) { | |
| 2235 | |
| 2236 const Register from = O0; // source array address | |
| 2237 const Register to = O1; // destination array address | |
| 2238 const Register count = O2; // elements count | |
| 2239 | |
| 2240 __ align(CodeEntryAlignment); | |
| 2241 StubCodeMark mark(this, "StubRoutines", name); | |
| 2242 address start = __ pc(); | |
| 2243 | |
| 2244 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
| 2245 | |
| 2246 if (!aligned) disjoint_oop_copy_entry = __ pc(); | |
| 2247 // caller can pass a 64-bit byte count here | |
| 2248 if (!aligned) BLOCK_COMMENT("Entry:"); | |
| 2249 | |
| 2250 // save arguments for barrier generation | |
| 2251 __ mov(to, G1); | |
| 2252 __ mov(count, G5); | |
| 2253 gen_write_ref_array_pre_barrier(G1, G5); | |
| 2254 #ifdef _LP64 | |
|
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2255 assert_clean_int(count, O3); // Make sure 'count' is clean int. |
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2256 if (UseCompressedOops) { |
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2257 generate_disjoint_int_copy_core(aligned); |
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2258 } else { |
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2259 generate_disjoint_long_copy_core(aligned); |
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2260 } |
| 0 | 2261 #else |
| 2262 generate_disjoint_int_copy_core(aligned); | |
| 2263 #endif | |
| 2264 // O0 is used as temp register | |
| 2265 gen_write_ref_array_post_barrier(G1, G5, O0); | |
| 2266 | |
| 2267 // O3, O4 are used as temp registers | |
| 2268 inc_counter_np(SharedRuntime::_oop_array_copy_ctr, O3, O4); | |
| 2269 __ retl(); | |
| 2270 __ delayed()->mov(G0, O0); // return 0 | |
| 2271 return start; | |
| 2272 } | |
| 2273 | |
| 2274 // Generate stub for conjoint oop copy. If "aligned" is true, the | |
| 2275 // "from" and "to" addresses are assumed to be heapword aligned. | |
| 2276 // | |
| 2277 // Arguments for generated stub: | |
| 2278 // from: O0 | |
| 2279 // to: O1 | |
| 2280 // count: O2 treated as signed | |
| 2281 // | |
| 2282 address generate_conjoint_oop_copy(bool aligned, const char * name) { | |
| 2283 | |
| 2284 const Register from = O0; // source array address | |
| 2285 const Register to = O1; // destination array address | |
| 2286 const Register count = O2; // elements count | |
| 2287 | |
| 2288 __ align(CodeEntryAlignment); | |
| 2289 StubCodeMark mark(this, "StubRoutines", name); | |
| 2290 address start = __ pc(); | |
| 2291 | |
| 2292 assert_clean_int(count, O3); // Make sure 'count' is clean int. | |
| 2293 | |
| 2294 if (!aligned) oop_copy_entry = __ pc(); | |
| 2295 // caller can pass a 64-bit byte count here | |
| 2296 if (!aligned) BLOCK_COMMENT("Entry:"); | |
| 2297 | |
| 2298 // save arguments for barrier generation | |
| 2299 __ mov(to, G1); | |
| 2300 __ mov(count, G5); | |
| 2301 | |
| 2302 gen_write_ref_array_pre_barrier(G1, G5); | |
| 2303 | |
| 2304 address nooverlap_target = aligned ? | |
| 2305 StubRoutines::arrayof_oop_disjoint_arraycopy() : | |
| 2306 disjoint_oop_copy_entry; | |
| 2307 | |
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2308 array_overlap_test(nooverlap_target, LogBytesPerHeapOop); |
| 0 | 2309 |
| 2310 #ifdef _LP64 | |
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2311 if (UseCompressedOops) { |
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2312 generate_conjoint_int_copy_core(aligned); |
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2313 } else { |
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2314 generate_conjoint_long_copy_core(aligned); |
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2315 } |
| 0 | 2316 #else |
| 2317 generate_conjoint_int_copy_core(aligned); | |
| 2318 #endif | |
| 2319 | |
| 2320 // O0 is used as temp register | |
| 2321 gen_write_ref_array_post_barrier(G1, G5, O0); | |
| 2322 | |
| 2323 // O3, O4 are used as temp registers | |
| 2324 inc_counter_np(SharedRuntime::_oop_array_copy_ctr, O3, O4); | |
| 2325 __ retl(); | |
| 2326 __ delayed()->mov(G0, O0); // return 0 | |
| 2327 return start; | |
| 2328 } | |
| 2329 | |
| 2330 | |
| 2331 // Helper for generating a dynamic type check. | |
| 2332 // Smashes only the given temp registers. | |
| 2333 void generate_type_check(Register sub_klass, | |
| 2334 Register super_check_offset, | |
| 2335 Register super_klass, | |
| 2336 Register temp, | |
| 2337 Label& L_success, | |
| 2338 Register deccc_hack = noreg) { | |
| 2339 assert_different_registers(sub_klass, super_check_offset, super_klass, temp); | |
| 2340 | |
| 2341 BLOCK_COMMENT("type_check:"); | |
| 2342 | |
| 2343 Label L_miss; | |
| 2344 | |
| 2345 assert_clean_int(super_check_offset, temp); | |
| 2346 | |
| 2347 // maybe decrement caller's trip count: | |
| 2348 #define DELAY_SLOT delayed(); \ | |
| 2349 { if (deccc_hack == noreg) __ nop(); else __ deccc(deccc_hack); } | |
| 2350 | |
| 2351 // if the pointers are equal, we are done (e.g., String[] elements) | |
| 2352 __ cmp(sub_klass, super_klass); | |
| 2353 __ brx(Assembler::equal, true, Assembler::pt, L_success); | |
| 2354 __ DELAY_SLOT; | |
| 2355 | |
| 2356 // check the supertype display: | |
| 2357 __ ld_ptr(sub_klass, super_check_offset, temp); // query the super type | |
| 2358 __ cmp(super_klass, temp); // test the super type | |
| 2359 __ brx(Assembler::equal, true, Assembler::pt, L_success); | |
| 2360 __ DELAY_SLOT; | |
| 2361 | |
| 2362 int sc_offset = (klassOopDesc::header_size() * HeapWordSize + | |
| 2363 Klass::secondary_super_cache_offset_in_bytes()); | |
| 2364 __ cmp(super_klass, sc_offset); | |
| 2365 __ brx(Assembler::notEqual, true, Assembler::pt, L_miss); | |
| 2366 __ delayed()->nop(); | |
| 2367 | |
| 2368 __ save_frame(0); | |
| 2369 __ mov(sub_klass->after_save(), O1); | |
| 2370 // mov(super_klass->after_save(), O2); //fill delay slot | |
| 2371 assert(StubRoutines::Sparc::_partial_subtype_check != NULL, "order of generation"); | |
| 2372 __ call(StubRoutines::Sparc::_partial_subtype_check); | |
| 2373 __ delayed()->mov(super_klass->after_save(), O2); | |
| 2374 __ restore(); | |
| 2375 | |
| 2376 // Upon return, the condition codes are already set. | |
| 2377 __ brx(Assembler::equal, true, Assembler::pt, L_success); | |
| 2378 __ DELAY_SLOT; | |
| 2379 | |
| 2380 #undef DELAY_SLOT | |
| 2381 | |
| 2382 // Fall through on failure! | |
| 2383 __ BIND(L_miss); | |
| 2384 } | |
| 2385 | |
| 2386 | |
| 2387 // Generate stub for checked oop copy. | |
| 2388 // | |
| 2389 // Arguments for generated stub: | |
| 2390 // from: O0 | |
| 2391 // to: O1 | |
| 2392 // count: O2 treated as signed | |
| 2393 // ckoff: O3 (super_check_offset) | |
| 2394 // ckval: O4 (super_klass) | |
| 2395 // ret: O0 zero for success; (-1^K) where K is partial transfer count | |
| 2396 // | |
| 2397 address generate_checkcast_copy(const char* name) { | |
| 2398 | |
| 2399 const Register O0_from = O0; // source array address | |
| 2400 const Register O1_to = O1; // destination array address | |
| 2401 const Register O2_count = O2; // elements count | |
| 2402 const Register O3_ckoff = O3; // super_check_offset | |
| 2403 const Register O4_ckval = O4; // super_klass | |
| 2404 | |
| 2405 const Register O5_offset = O5; // loop var, with stride wordSize | |
| 2406 const Register G1_remain = G1; // loop var, with stride -1 | |
| 2407 const Register G3_oop = G3; // actual oop copied | |
| 2408 const Register G4_klass = G4; // oop._klass | |
| 2409 const Register G5_super = G5; // oop._klass._primary_supers[ckval] | |
| 2410 | |
| 2411 __ align(CodeEntryAlignment); | |
| 2412 StubCodeMark mark(this, "StubRoutines", name); | |
| 2413 address start = __ pc(); | |
| 2414 | |
| 2415 gen_write_ref_array_pre_barrier(G1, G5); | |
| 2416 | |
| 2417 | |
| 2418 #ifdef ASSERT | |
| 2419 // We sometimes save a frame (see partial_subtype_check below). | |
| 2420 // If this will cause trouble, let's fail now instead of later. | |
| 2421 __ save_frame(0); | |
| 2422 __ restore(); | |
| 2423 #endif | |
| 2424 | |
| 2425 #ifdef ASSERT | |
| 2426 // caller guarantees that the arrays really are different | |
| 2427 // otherwise, we would have to make conjoint checks | |
| 2428 { Label L; | |
| 2429 __ mov(O3, G1); // spill: overlap test smashes O3 | |
| 2430 __ mov(O4, G4); // spill: overlap test smashes O4 | |
|
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2431 array_overlap_test(L, LogBytesPerHeapOop); |
| 0 | 2432 __ stop("checkcast_copy within a single array"); |
| 2433 __ bind(L); | |
| 2434 __ mov(G1, O3); | |
| 2435 __ mov(G4, O4); | |
| 2436 } | |
| 2437 #endif //ASSERT | |
| 2438 | |
| 2439 assert_clean_int(O2_count, G1); // Make sure 'count' is clean int. | |
| 2440 | |
| 2441 checkcast_copy_entry = __ pc(); | |
| 2442 // caller can pass a 64-bit byte count here (from generic stub) | |
| 2443 BLOCK_COMMENT("Entry:"); | |
| 2444 | |
| 2445 Label load_element, store_element, do_card_marks, fail, done; | |
| 2446 __ addcc(O2_count, 0, G1_remain); // initialize loop index, and test it | |
| 2447 __ brx(Assembler::notZero, false, Assembler::pt, load_element); | |
| 2448 __ delayed()->mov(G0, O5_offset); // offset from start of arrays | |
| 2449 | |
| 2450 // Empty array: Nothing to do. | |
| 2451 inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr, O3, O4); | |
| 2452 __ retl(); | |
| 2453 __ delayed()->set(0, O0); // return 0 on (trivial) success | |
| 2454 | |
| 2455 // ======== begin loop ======== | |
| 2456 // (Loop is rotated; its entry is load_element.) | |
| 2457 // Loop variables: | |
| 2458 // (O5 = 0; ; O5 += wordSize) --- offset from src, dest arrays | |
| 2459 // (O2 = len; O2 != 0; O2--) --- number of oops *remaining* | |
| 2460 // G3, G4, G5 --- current oop, oop.klass, oop.klass.super | |
| 2461 __ align(16); | |
| 2462 | |
| 2463 __ bind(store_element); | |
| 2464 // deccc(G1_remain); // decrement the count (hoisted) | |
|
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2465 __ store_heap_oop(G3_oop, O1_to, O5_offset); // store the oop |
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2466 __ inc(O5_offset, heapOopSize); // step to next offset |
| 0 | 2467 __ brx(Assembler::zero, true, Assembler::pt, do_card_marks); |
| 2468 __ delayed()->set(0, O0); // return -1 on success | |
| 2469 | |
| 2470 // ======== loop entry is here ======== | |
| 2471 __ bind(load_element); | |
|
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2472 __ load_heap_oop(O0_from, O5_offset, G3_oop); // load the oop |
| 0 | 2473 __ br_null(G3_oop, true, Assembler::pt, store_element); |
| 2474 __ delayed()->deccc(G1_remain); // decrement the count | |
| 2475 | |
|
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2476 __ load_klass(G3_oop, G4_klass); // query the object klass |
| 0 | 2477 |
| 2478 generate_type_check(G4_klass, O3_ckoff, O4_ckval, G5_super, | |
| 2479 // branch to this on success: | |
| 2480 store_element, | |
| 2481 // decrement this on success: | |
| 2482 G1_remain); | |
| 2483 // ======== end loop ======== | |
| 2484 | |
| 2485 // It was a real error; we must depend on the caller to finish the job. | |
| 2486 // Register G1 has number of *remaining* oops, O2 number of *total* oops. | |
| 2487 // Emit GC store barriers for the oops we have copied (O2 minus G1), | |
| 2488 // and report their number to the caller. | |
| 2489 __ bind(fail); | |
| 2490 __ subcc(O2_count, G1_remain, O2_count); | |
| 2491 __ brx(Assembler::zero, false, Assembler::pt, done); | |
| 2492 __ delayed()->not1(O2_count, O0); // report (-1^K) to caller | |
| 2493 | |
| 2494 __ bind(do_card_marks); | |
| 2495 gen_write_ref_array_post_barrier(O1_to, O2_count, O3); // store check on O1[0..O2] | |
| 2496 | |
| 2497 __ bind(done); | |
| 2498 inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr, O3, O4); | |
| 2499 __ retl(); | |
| 2500 __ delayed()->nop(); // return value in 00 | |
| 2501 | |
| 2502 return start; | |
| 2503 } | |
| 2504 | |
| 2505 | |
| 2506 // Generate 'unsafe' array copy stub | |
| 2507 // Though just as safe as the other stubs, it takes an unscaled | |
| 2508 // size_t argument instead of an element count. | |
| 2509 // | |
| 2510 // Arguments for generated stub: | |
| 2511 // from: O0 | |
| 2512 // to: O1 | |
| 2513 // count: O2 byte count, treated as ssize_t, can be zero | |
| 2514 // | |
| 2515 // Examines the alignment of the operands and dispatches | |
| 2516 // to a long, int, short, or byte copy loop. | |
| 2517 // | |
| 2518 address generate_unsafe_copy(const char* name) { | |
| 2519 | |
| 2520 const Register O0_from = O0; // source array address | |
| 2521 const Register O1_to = O1; // destination array address | |
| 2522 const Register O2_count = O2; // elements count | |
| 2523 | |
| 2524 const Register G1_bits = G1; // test copy of low bits | |
| 2525 | |
| 2526 __ align(CodeEntryAlignment); | |
| 2527 StubCodeMark mark(this, "StubRoutines", name); | |
| 2528 address start = __ pc(); | |
| 2529 | |
| 2530 // bump this on entry, not on exit: | |
| 2531 inc_counter_np(SharedRuntime::_unsafe_array_copy_ctr, G1, G3); | |
| 2532 | |
| 2533 __ or3(O0_from, O1_to, G1_bits); | |
| 2534 __ or3(O2_count, G1_bits, G1_bits); | |
| 2535 | |
| 2536 __ btst(BytesPerLong-1, G1_bits); | |
| 2537 __ br(Assembler::zero, true, Assembler::pt, | |
| 2538 long_copy_entry, relocInfo::runtime_call_type); | |
| 2539 // scale the count on the way out: | |
| 2540 __ delayed()->srax(O2_count, LogBytesPerLong, O2_count); | |
| 2541 | |
| 2542 __ btst(BytesPerInt-1, G1_bits); | |
| 2543 __ br(Assembler::zero, true, Assembler::pt, | |
| 2544 int_copy_entry, relocInfo::runtime_call_type); | |
| 2545 // scale the count on the way out: | |
| 2546 __ delayed()->srax(O2_count, LogBytesPerInt, O2_count); | |
| 2547 | |
| 2548 __ btst(BytesPerShort-1, G1_bits); | |
| 2549 __ br(Assembler::zero, true, Assembler::pt, | |
| 2550 short_copy_entry, relocInfo::runtime_call_type); | |
| 2551 // scale the count on the way out: | |
| 2552 __ delayed()->srax(O2_count, LogBytesPerShort, O2_count); | |
| 2553 | |
| 2554 __ br(Assembler::always, false, Assembler::pt, | |
| 2555 byte_copy_entry, relocInfo::runtime_call_type); | |
| 2556 __ delayed()->nop(); | |
| 2557 | |
| 2558 return start; | |
| 2559 } | |
| 2560 | |
| 2561 | |
| 2562 // Perform range checks on the proposed arraycopy. | |
| 2563 // Kills the two temps, but nothing else. | |
| 2564 // Also, clean the sign bits of src_pos and dst_pos. | |
| 2565 void arraycopy_range_checks(Register src, // source array oop (O0) | |
| 2566 Register src_pos, // source position (O1) | |
| 2567 Register dst, // destination array oo (O2) | |
| 2568 Register dst_pos, // destination position (O3) | |
| 2569 Register length, // length of copy (O4) | |
| 2570 Register temp1, Register temp2, | |
| 2571 Label& L_failed) { | |
| 2572 BLOCK_COMMENT("arraycopy_range_checks:"); | |
| 2573 | |
| 2574 // if (src_pos + length > arrayOop(src)->length() ) FAIL; | |
| 2575 | |
| 2576 const Register array_length = temp1; // scratch | |
| 2577 const Register end_pos = temp2; // scratch | |
| 2578 | |
| 2579 // Note: This next instruction may be in the delay slot of a branch: | |
| 2580 __ add(length, src_pos, end_pos); // src_pos + length | |
| 2581 __ lduw(src, arrayOopDesc::length_offset_in_bytes(), array_length); | |
| 2582 __ cmp(end_pos, array_length); | |
| 2583 __ br(Assembler::greater, false, Assembler::pn, L_failed); | |
| 2584 | |
| 2585 // if (dst_pos + length > arrayOop(dst)->length() ) FAIL; | |
| 2586 __ delayed()->add(length, dst_pos, end_pos); // dst_pos + length | |
| 2587 __ lduw(dst, arrayOopDesc::length_offset_in_bytes(), array_length); | |
| 2588 __ cmp(end_pos, array_length); | |
| 2589 __ br(Assembler::greater, false, Assembler::pn, L_failed); | |
| 2590 | |
| 2591 // Have to clean up high 32-bits of 'src_pos' and 'dst_pos'. | |
| 2592 // Move with sign extension can be used since they are positive. | |
| 2593 __ delayed()->signx(src_pos, src_pos); | |
| 2594 __ signx(dst_pos, dst_pos); | |
| 2595 | |
| 2596 BLOCK_COMMENT("arraycopy_range_checks done"); | |
| 2597 } | |
| 2598 | |
| 2599 | |
| 2600 // | |
| 2601 // Generate generic array copy stubs | |
| 2602 // | |
| 2603 // Input: | |
| 2604 // O0 - src oop | |
| 2605 // O1 - src_pos | |
| 2606 // O2 - dst oop | |
| 2607 // O3 - dst_pos | |
| 2608 // O4 - element count | |
| 2609 // | |
| 2610 // Output: | |
| 2611 // O0 == 0 - success | |
| 2612 // O0 == -1 - need to call System.arraycopy | |
| 2613 // | |
| 2614 address generate_generic_copy(const char *name) { | |
| 2615 | |
| 2616 Label L_failed, L_objArray; | |
| 2617 | |
| 2618 // Input registers | |
| 2619 const Register src = O0; // source array oop | |
| 2620 const Register src_pos = O1; // source position | |
| 2621 const Register dst = O2; // destination array oop | |
| 2622 const Register dst_pos = O3; // destination position | |
| 2623 const Register length = O4; // elements count | |
| 2624 | |
| 2625 // registers used as temp | |
| 2626 const Register G3_src_klass = G3; // source array klass | |
| 2627 const Register G4_dst_klass = G4; // destination array klass | |
| 2628 const Register G5_lh = G5; // layout handler | |
| 2629 const Register O5_temp = O5; | |
| 2630 | |
| 2631 __ align(CodeEntryAlignment); | |
| 2632 StubCodeMark mark(this, "StubRoutines", name); | |
| 2633 address start = __ pc(); | |
| 2634 | |
| 2635 // bump this on entry, not on exit: | |
| 2636 inc_counter_np(SharedRuntime::_generic_array_copy_ctr, G1, G3); | |
| 2637 | |
| 2638 // In principle, the int arguments could be dirty. | |
| 2639 //assert_clean_int(src_pos, G1); | |
| 2640 //assert_clean_int(dst_pos, G1); | |
| 2641 //assert_clean_int(length, G1); | |
| 2642 | |
| 2643 //----------------------------------------------------------------------- | |
| 2644 // Assembler stubs will be used for this call to arraycopy | |
| 2645 // if the following conditions are met: | |
| 2646 // | |
| 2647 // (1) src and dst must not be null. | |
| 2648 // (2) src_pos must not be negative. | |
| 2649 // (3) dst_pos must not be negative. | |
| 2650 // (4) length must not be negative. | |
| 2651 // (5) src klass and dst klass should be the same and not NULL. | |
| 2652 // (6) src and dst should be arrays. | |
| 2653 // (7) src_pos + length must not exceed length of src. | |
| 2654 // (8) dst_pos + length must not exceed length of dst. | |
| 2655 BLOCK_COMMENT("arraycopy initial argument checks"); | |
| 2656 | |
| 2657 // if (src == NULL) return -1; | |
| 2658 __ br_null(src, false, Assembler::pn, L_failed); | |
| 2659 | |
| 2660 // if (src_pos < 0) return -1; | |
| 2661 __ delayed()->tst(src_pos); | |
| 2662 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
| 2663 __ delayed()->nop(); | |
| 2664 | |
| 2665 // if (dst == NULL) return -1; | |
| 2666 __ br_null(dst, false, Assembler::pn, L_failed); | |
| 2667 | |
| 2668 // if (dst_pos < 0) return -1; | |
| 2669 __ delayed()->tst(dst_pos); | |
| 2670 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
| 2671 | |
| 2672 // if (length < 0) return -1; | |
| 2673 __ delayed()->tst(length); | |
| 2674 __ br(Assembler::negative, false, Assembler::pn, L_failed); | |
| 2675 | |
| 2676 BLOCK_COMMENT("arraycopy argument klass checks"); | |
| 2677 // get src->klass() | |
|
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2678 if (UseCompressedOops) { |
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2679 __ delayed()->nop(); // ??? not good |
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2680 __ load_klass(src, G3_src_klass); |
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2681 } else { |
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2682 __ delayed()->ld_ptr(src, oopDesc::klass_offset_in_bytes(), G3_src_klass); |
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2683 } |
| 0 | 2684 |
| 2685 #ifdef ASSERT | |
| 2686 // assert(src->klass() != NULL); | |
| 2687 BLOCK_COMMENT("assert klasses not null"); | |
| 2688 { Label L_a, L_b; | |
| 2689 __ br_notnull(G3_src_klass, false, Assembler::pt, L_b); // it is broken if klass is NULL | |
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2690 __ delayed()->nop(); |
| 0 | 2691 __ bind(L_a); |
| 2692 __ stop("broken null klass"); | |
| 2693 __ bind(L_b); | |
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2694 __ load_klass(dst, G4_dst_klass); |
| 0 | 2695 __ br_null(G4_dst_klass, false, Assembler::pn, L_a); // this would be broken also |
| 2696 __ delayed()->mov(G0, G4_dst_klass); // scribble the temp | |
| 2697 BLOCK_COMMENT("assert done"); | |
| 2698 } | |
| 2699 #endif | |
| 2700 | |
| 2701 // Load layout helper | |
| 2702 // | |
| 2703 // |array_tag| | header_size | element_type | |log2_element_size| | |
| 2704 // 32 30 24 16 8 2 0 | |
| 2705 // | |
| 2706 // array_tag: typeArray = 0x3, objArray = 0x2, non-array = 0x0 | |
| 2707 // | |
| 2708 | |
| 2709 int lh_offset = klassOopDesc::header_size() * HeapWordSize + | |
| 2710 Klass::layout_helper_offset_in_bytes(); | |
| 2711 | |
| 2712 // Load 32-bits signed value. Use br() instruction with it to check icc. | |
| 2713 __ lduw(G3_src_klass, lh_offset, G5_lh); | |
| 2714 | |
|
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2715 if (UseCompressedOops) { |
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2716 __ load_klass(dst, G4_dst_klass); |
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2717 } |
| 0 | 2718 // Handle objArrays completely differently... |
| 2719 juint objArray_lh = Klass::array_layout_helper(T_OBJECT); | |
| 2720 __ set(objArray_lh, O5_temp); | |
| 2721 __ cmp(G5_lh, O5_temp); | |
| 2722 __ br(Assembler::equal, false, Assembler::pt, L_objArray); | |
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2723 if (UseCompressedOops) { |
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2724 __ delayed()->nop(); |
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2725 } else { |
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2726 __ delayed()->ld_ptr(dst, oopDesc::klass_offset_in_bytes(), G4_dst_klass); |
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2727 } |
| 0 | 2728 |
| 2729 // if (src->klass() != dst->klass()) return -1; | |
| 2730 __ cmp(G3_src_klass, G4_dst_klass); | |
| 2731 __ brx(Assembler::notEqual, false, Assembler::pn, L_failed); | |
| 2732 __ delayed()->nop(); | |
| 2733 | |
| 2734 // if (!src->is_Array()) return -1; | |
| 2735 __ cmp(G5_lh, Klass::_lh_neutral_value); // < 0 | |
| 2736 __ br(Assembler::greaterEqual, false, Assembler::pn, L_failed); | |
| 2737 | |
| 2738 // At this point, it is known to be a typeArray (array_tag 0x3). | |
| 2739 #ifdef ASSERT | |
| 2740 __ delayed()->nop(); | |
| 2741 { Label L; | |
| 2742 jint lh_prim_tag_in_place = (Klass::_lh_array_tag_type_value << Klass::_lh_array_tag_shift); | |
| 2743 __ set(lh_prim_tag_in_place, O5_temp); | |
| 2744 __ cmp(G5_lh, O5_temp); | |
| 2745 __ br(Assembler::greaterEqual, false, Assembler::pt, L); | |
| 2746 __ delayed()->nop(); | |
| 2747 __ stop("must be a primitive array"); | |
| 2748 __ bind(L); | |
| 2749 } | |
| 2750 #else | |
| 2751 __ delayed(); // match next insn to prev branch | |
| 2752 #endif | |
| 2753 | |
| 2754 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
| 2755 O5_temp, G4_dst_klass, L_failed); | |
| 2756 | |
| 2757 // typeArrayKlass | |
| 2758 // | |
| 2759 // src_addr = (src + array_header_in_bytes()) + (src_pos << log2elemsize); | |
| 2760 // dst_addr = (dst + array_header_in_bytes()) + (dst_pos << log2elemsize); | |
| 2761 // | |
| 2762 | |
| 2763 const Register G4_offset = G4_dst_klass; // array offset | |
| 2764 const Register G3_elsize = G3_src_klass; // log2 element size | |
| 2765 | |
| 2766 __ srl(G5_lh, Klass::_lh_header_size_shift, G4_offset); | |
| 2767 __ and3(G4_offset, Klass::_lh_header_size_mask, G4_offset); // array_offset | |
| 2768 __ add(src, G4_offset, src); // src array offset | |
| 2769 __ add(dst, G4_offset, dst); // dst array offset | |
| 2770 __ and3(G5_lh, Klass::_lh_log2_element_size_mask, G3_elsize); // log2 element size | |
| 2771 | |
| 2772 // next registers should be set before the jump to corresponding stub | |
| 2773 const Register from = O0; // source array address | |
| 2774 const Register to = O1; // destination array address | |
| 2775 const Register count = O2; // elements count | |
| 2776 | |
| 2777 // 'from', 'to', 'count' registers should be set in this order | |
| 2778 // since they are the same as 'src', 'src_pos', 'dst'. | |
| 2779 | |
| 2780 BLOCK_COMMENT("scale indexes to element size"); | |
| 2781 __ sll_ptr(src_pos, G3_elsize, src_pos); | |
| 2782 __ sll_ptr(dst_pos, G3_elsize, dst_pos); | |
| 2783 __ add(src, src_pos, from); // src_addr | |
| 2784 __ add(dst, dst_pos, to); // dst_addr | |
| 2785 | |
| 2786 BLOCK_COMMENT("choose copy loop based on element size"); | |
| 2787 __ cmp(G3_elsize, 0); | |
| 2788 __ br(Assembler::equal,true,Assembler::pt,StubRoutines::_jbyte_arraycopy); | |
| 2789 __ delayed()->signx(length, count); // length | |
| 2790 | |
| 2791 __ cmp(G3_elsize, LogBytesPerShort); | |
| 2792 __ br(Assembler::equal,true,Assembler::pt,StubRoutines::_jshort_arraycopy); | |
| 2793 __ delayed()->signx(length, count); // length | |
| 2794 | |
| 2795 __ cmp(G3_elsize, LogBytesPerInt); | |
| 2796 __ br(Assembler::equal,true,Assembler::pt,StubRoutines::_jint_arraycopy); | |
| 2797 __ delayed()->signx(length, count); // length | |
| 2798 #ifdef ASSERT | |
| 2799 { Label L; | |
| 2800 __ cmp(G3_elsize, LogBytesPerLong); | |
| 2801 __ br(Assembler::equal, false, Assembler::pt, L); | |
| 2802 __ delayed()->nop(); | |
| 2803 __ stop("must be long copy, but elsize is wrong"); | |
| 2804 __ bind(L); | |
| 2805 } | |
| 2806 #endif | |
| 2807 __ br(Assembler::always,false,Assembler::pt,StubRoutines::_jlong_arraycopy); | |
| 2808 __ delayed()->signx(length, count); // length | |
| 2809 | |
| 2810 // objArrayKlass | |
| 2811 __ BIND(L_objArray); | |
| 2812 // live at this point: G3_src_klass, G4_dst_klass, src[_pos], dst[_pos], length | |
| 2813 | |
| 2814 Label L_plain_copy, L_checkcast_copy; | |
| 2815 // test array classes for subtyping | |
| 2816 __ cmp(G3_src_klass, G4_dst_klass); // usual case is exact equality | |
| 2817 __ brx(Assembler::notEqual, true, Assembler::pn, L_checkcast_copy); | |
| 2818 __ delayed()->lduw(G4_dst_klass, lh_offset, O5_temp); // hoisted from below | |
| 2819 | |
| 2820 // Identically typed arrays can be copied without element-wise checks. | |
| 2821 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
| 2822 O5_temp, G5_lh, L_failed); | |
| 2823 | |
| 2824 __ add(src, arrayOopDesc::base_offset_in_bytes(T_OBJECT), src); //src offset | |
| 2825 __ add(dst, arrayOopDesc::base_offset_in_bytes(T_OBJECT), dst); //dst offset | |
|
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2826 __ sll_ptr(src_pos, LogBytesPerHeapOop, src_pos); |
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2827 __ sll_ptr(dst_pos, LogBytesPerHeapOop, dst_pos); |
| 0 | 2828 __ add(src, src_pos, from); // src_addr |
| 2829 __ add(dst, dst_pos, to); // dst_addr | |
| 2830 __ BIND(L_plain_copy); | |
| 2831 __ br(Assembler::always, false, Assembler::pt,StubRoutines::_oop_arraycopy); | |
| 2832 __ delayed()->signx(length, count); // length | |
| 2833 | |
| 2834 __ BIND(L_checkcast_copy); | |
| 2835 // live at this point: G3_src_klass, G4_dst_klass | |
| 2836 { | |
| 2837 // Before looking at dst.length, make sure dst is also an objArray. | |
| 2838 // lduw(G4_dst_klass, lh_offset, O5_temp); // hoisted to delay slot | |
| 2839 __ cmp(G5_lh, O5_temp); | |
| 2840 __ br(Assembler::notEqual, false, Assembler::pn, L_failed); | |
| 2841 | |
| 2842 // It is safe to examine both src.length and dst.length. | |
| 2843 __ delayed(); // match next insn to prev branch | |
| 2844 arraycopy_range_checks(src, src_pos, dst, dst_pos, length, | |
| 2845 O5_temp, G5_lh, L_failed); | |
| 2846 | |
| 2847 // Marshal the base address arguments now, freeing registers. | |
| 2848 __ add(src, arrayOopDesc::base_offset_in_bytes(T_OBJECT), src); //src offset | |
| 2849 __ add(dst, arrayOopDesc::base_offset_in_bytes(T_OBJECT), dst); //dst offset | |
|
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2850 __ sll_ptr(src_pos, LogBytesPerHeapOop, src_pos); |
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2851 __ sll_ptr(dst_pos, LogBytesPerHeapOop, dst_pos); |
| 0 | 2852 __ add(src, src_pos, from); // src_addr |
| 2853 __ add(dst, dst_pos, to); // dst_addr | |
| 2854 __ signx(length, count); // length (reloaded) | |
| 2855 | |
| 2856 Register sco_temp = O3; // this register is free now | |
| 2857 assert_different_registers(from, to, count, sco_temp, | |
| 2858 G4_dst_klass, G3_src_klass); | |
| 2859 | |
| 2860 // Generate the type check. | |
| 2861 int sco_offset = (klassOopDesc::header_size() * HeapWordSize + | |
| 2862 Klass::super_check_offset_offset_in_bytes()); | |
| 2863 __ lduw(G4_dst_klass, sco_offset, sco_temp); | |
| 2864 generate_type_check(G3_src_klass, sco_temp, G4_dst_klass, | |
| 2865 O5_temp, L_plain_copy); | |
| 2866 | |
| 2867 // Fetch destination element klass from the objArrayKlass header. | |
| 2868 int ek_offset = (klassOopDesc::header_size() * HeapWordSize + | |
| 2869 objArrayKlass::element_klass_offset_in_bytes()); | |
| 2870 | |
| 2871 // the checkcast_copy loop needs two extra arguments: | |
| 2872 __ ld_ptr(G4_dst_klass, ek_offset, O4); // dest elem klass | |
| 2873 // lduw(O4, sco_offset, O3); // sco of elem klass | |
| 2874 | |
| 2875 __ br(Assembler::always, false, Assembler::pt, checkcast_copy_entry); | |
| 2876 __ delayed()->lduw(O4, sco_offset, O3); | |
| 2877 } | |
| 2878 | |
| 2879 __ BIND(L_failed); | |
| 2880 __ retl(); | |
| 2881 __ delayed()->sub(G0, 1, O0); // return -1 | |
| 2882 return start; | |
| 2883 } | |
| 2884 | |
| 2885 void generate_arraycopy_stubs() { | |
| 2886 | |
| 2887 // Note: the disjoint stubs must be generated first, some of | |
| 2888 // the conjoint stubs use them. | |
| 2889 StubRoutines::_jbyte_disjoint_arraycopy = generate_disjoint_byte_copy(false, "jbyte_disjoint_arraycopy"); | |
| 2890 StubRoutines::_jshort_disjoint_arraycopy = generate_disjoint_short_copy(false, "jshort_disjoint_arraycopy"); | |
| 2891 StubRoutines::_jint_disjoint_arraycopy = generate_disjoint_int_copy(false, "jint_disjoint_arraycopy"); | |
| 2892 StubRoutines::_jlong_disjoint_arraycopy = generate_disjoint_long_copy(false, "jlong_disjoint_arraycopy"); | |
| 2893 StubRoutines::_oop_disjoint_arraycopy = generate_disjoint_oop_copy(false, "oop_disjoint_arraycopy"); | |
| 2894 StubRoutines::_arrayof_jbyte_disjoint_arraycopy = generate_disjoint_byte_copy(true, "arrayof_jbyte_disjoint_arraycopy"); | |
| 2895 StubRoutines::_arrayof_jshort_disjoint_arraycopy = generate_disjoint_short_copy(true, "arrayof_jshort_disjoint_arraycopy"); | |
| 2896 StubRoutines::_arrayof_jint_disjoint_arraycopy = generate_disjoint_int_copy(true, "arrayof_jint_disjoint_arraycopy"); | |
| 2897 StubRoutines::_arrayof_jlong_disjoint_arraycopy = generate_disjoint_long_copy(true, "arrayof_jlong_disjoint_arraycopy"); | |
| 2898 StubRoutines::_arrayof_oop_disjoint_arraycopy = generate_disjoint_oop_copy(true, "arrayof_oop_disjoint_arraycopy"); | |
| 2899 | |
| 2900 StubRoutines::_jbyte_arraycopy = generate_conjoint_byte_copy(false, "jbyte_arraycopy"); | |
| 2901 StubRoutines::_jshort_arraycopy = generate_conjoint_short_copy(false, "jshort_arraycopy"); | |
| 2902 StubRoutines::_jint_arraycopy = generate_conjoint_int_copy(false, "jint_arraycopy"); | |
| 2903 StubRoutines::_jlong_arraycopy = generate_conjoint_long_copy(false, "jlong_arraycopy"); | |
| 2904 StubRoutines::_oop_arraycopy = generate_conjoint_oop_copy(false, "oop_arraycopy"); | |
| 2905 StubRoutines::_arrayof_jbyte_arraycopy = generate_conjoint_byte_copy(true, "arrayof_jbyte_arraycopy"); | |
| 2906 StubRoutines::_arrayof_jshort_arraycopy = generate_conjoint_short_copy(true, "arrayof_jshort_arraycopy"); | |
| 2907 #ifdef _LP64 | |
| 2908 // since sizeof(jint) < sizeof(HeapWord), there's a different flavor: | |
| 2909 StubRoutines::_arrayof_jint_arraycopy = generate_conjoint_int_copy(true, "arrayof_jint_arraycopy"); | |
| 2910 #else | |
| 2911 StubRoutines::_arrayof_jint_arraycopy = StubRoutines::_jint_arraycopy; | |
| 2912 #endif | |
| 2913 StubRoutines::_arrayof_jlong_arraycopy = StubRoutines::_jlong_arraycopy; | |
| 2914 StubRoutines::_arrayof_oop_arraycopy = StubRoutines::_oop_arraycopy; | |
| 2915 | |
| 2916 StubRoutines::_checkcast_arraycopy = generate_checkcast_copy("checkcast_arraycopy"); | |
| 2917 StubRoutines::_unsafe_arraycopy = generate_unsafe_copy("unsafe_arraycopy"); | |
| 2918 StubRoutines::_generic_arraycopy = generate_generic_copy("generic_arraycopy"); | |
| 2919 } | |
| 2920 | |
| 2921 void generate_initial() { | |
| 2922 // Generates all stubs and initializes the entry points | |
| 2923 | |
| 2924 //------------------------------------------------------------------------------------------------------------------------ | |
| 2925 // entry points that exist in all platforms | |
| 2926 // Note: This is code that could be shared among different platforms - however the benefit seems to be smaller than | |
| 2927 // the disadvantage of having a much more complicated generator structure. See also comment in stubRoutines.hpp. | |
| 2928 StubRoutines::_forward_exception_entry = generate_forward_exception(); | |
| 2929 | |
| 2930 StubRoutines::_call_stub_entry = generate_call_stub(StubRoutines::_call_stub_return_address); | |
| 2931 StubRoutines::_catch_exception_entry = generate_catch_exception(); | |
| 2932 | |
| 2933 //------------------------------------------------------------------------------------------------------------------------ | |
| 2934 // entry points that are platform specific | |
| 2935 StubRoutines::Sparc::_test_stop_entry = generate_test_stop(); | |
| 2936 | |
| 2937 StubRoutines::Sparc::_stop_subroutine_entry = generate_stop_subroutine(); | |
| 2938 StubRoutines::Sparc::_flush_callers_register_windows_entry = generate_flush_callers_register_windows(); | |
| 2939 | |
| 2940 #if !defined(COMPILER2) && !defined(_LP64) | |
| 2941 StubRoutines::_atomic_xchg_entry = generate_atomic_xchg(); | |
| 2942 StubRoutines::_atomic_cmpxchg_entry = generate_atomic_cmpxchg(); | |
| 2943 StubRoutines::_atomic_add_entry = generate_atomic_add(); | |
| 2944 StubRoutines::_atomic_xchg_ptr_entry = StubRoutines::_atomic_xchg_entry; | |
| 2945 StubRoutines::_atomic_cmpxchg_ptr_entry = StubRoutines::_atomic_cmpxchg_entry; | |
| 2946 StubRoutines::_atomic_cmpxchg_long_entry = generate_atomic_cmpxchg_long(); | |
| 2947 StubRoutines::_atomic_add_ptr_entry = StubRoutines::_atomic_add_entry; | |
| 2948 StubRoutines::_fence_entry = generate_fence(); | |
| 2949 #endif // COMPILER2 !=> _LP64 | |
| 2950 | |
| 2951 StubRoutines::Sparc::_partial_subtype_check = generate_partial_subtype_check(); | |
| 2952 } | |
| 2953 | |
| 2954 | |
| 2955 void generate_all() { | |
| 2956 // Generates all stubs and initializes the entry points | |
| 2957 | |
| 2958 // These entry points require SharedInfo::stack0 to be set up in non-core builds | |
| 2959 StubRoutines::_throw_AbstractMethodError_entry = generate_throw_exception("AbstractMethodError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_AbstractMethodError), false); | |
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2960 StubRoutines::_throw_IncompatibleClassChangeError_entry= generate_throw_exception("IncompatibleClassChangeError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_IncompatibleClassChangeError), false); |
| 0 | 2961 StubRoutines::_throw_ArithmeticException_entry = generate_throw_exception("ArithmeticException throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_ArithmeticException), true); |
| 2962 StubRoutines::_throw_NullPointerException_entry = generate_throw_exception("NullPointerException throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException), true); | |
| 2963 StubRoutines::_throw_NullPointerException_at_call_entry= generate_throw_exception("NullPointerException at call throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_NullPointerException_at_call), false); | |
| 2964 StubRoutines::_throw_StackOverflowError_entry = generate_throw_exception("StackOverflowError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_StackOverflowError), false); | |
| 2965 | |
| 2966 StubRoutines::_handler_for_unsafe_access_entry = | |
| 2967 generate_handler_for_unsafe_access(); | |
| 2968 | |
| 2969 // support for verify_oop (must happen after universe_init) | |
| 2970 StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop_subroutine(); | |
| 2971 | |
| 2972 // arraycopy stubs used by compilers | |
| 2973 generate_arraycopy_stubs(); | |
| 2974 } | |
| 2975 | |
| 2976 | |
| 2977 public: | |
| 2978 StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) { | |
| 2979 // replace the standard masm with a special one: | |
| 2980 _masm = new MacroAssembler(code); | |
| 2981 | |
| 2982 _stub_count = !all ? 0x100 : 0x200; | |
| 2983 if (all) { | |
| 2984 generate_all(); | |
| 2985 } else { | |
| 2986 generate_initial(); | |
| 2987 } | |
| 2988 | |
| 2989 // make sure this stub is available for all local calls | |
| 2990 if (_atomic_add_stub.is_unbound()) { | |
| 2991 // generate a second time, if necessary | |
| 2992 (void) generate_atomic_add(); | |
| 2993 } | |
| 2994 } | |
| 2995 | |
| 2996 | |
| 2997 private: | |
| 2998 int _stub_count; | |
| 2999 void stub_prolog(StubCodeDesc* cdesc) { | |
| 3000 # ifdef ASSERT | |
| 3001 // put extra information in the stub code, to make it more readable | |
| 3002 #ifdef _LP64 | |
| 3003 // Write the high part of the address | |
| 3004 // [RGV] Check if there is a dependency on the size of this prolog | |
| 3005 __ emit_data((intptr_t)cdesc >> 32, relocInfo::none); | |
| 3006 #endif | |
| 3007 __ emit_data((intptr_t)cdesc, relocInfo::none); | |
| 3008 __ emit_data(++_stub_count, relocInfo::none); | |
| 3009 # endif | |
| 3010 align(true); | |
| 3011 } | |
| 3012 | |
| 3013 void align(bool at_header = false) { | |
| 3014 // %%%%% move this constant somewhere else | |
| 3015 // UltraSPARC cache line size is 8 instructions: | |
| 3016 const unsigned int icache_line_size = 32; | |
| 3017 const unsigned int icache_half_line_size = 16; | |
| 3018 | |
| 3019 if (at_header) { | |
| 3020 while ((intptr_t)(__ pc()) % icache_line_size != 0) { | |
| 3021 __ emit_data(0, relocInfo::none); | |
| 3022 } | |
| 3023 } else { | |
| 3024 while ((intptr_t)(__ pc()) % icache_half_line_size != 0) { | |
| 3025 __ nop(); | |
| 3026 } | |
| 3027 } | |
| 3028 } | |
| 3029 | |
| 3030 }; // end class declaration | |
| 3031 | |
| 3032 | |
| 3033 address StubGenerator::disjoint_byte_copy_entry = NULL; | |
| 3034 address StubGenerator::disjoint_short_copy_entry = NULL; | |
| 3035 address StubGenerator::disjoint_int_copy_entry = NULL; | |
| 3036 address StubGenerator::disjoint_long_copy_entry = NULL; | |
| 3037 address StubGenerator::disjoint_oop_copy_entry = NULL; | |
| 3038 | |
| 3039 address StubGenerator::byte_copy_entry = NULL; | |
| 3040 address StubGenerator::short_copy_entry = NULL; | |
| 3041 address StubGenerator::int_copy_entry = NULL; | |
| 3042 address StubGenerator::long_copy_entry = NULL; | |
| 3043 address StubGenerator::oop_copy_entry = NULL; | |
| 3044 | |
| 3045 address StubGenerator::checkcast_copy_entry = NULL; | |
| 3046 | |
| 3047 void StubGenerator_generate(CodeBuffer* code, bool all) { | |
| 3048 StubGenerator g(code, all); | |
| 3049 } |