1 /* 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "asm/codeBuffer.hpp" 27 #include "memory/resourceArea.hpp" 28 #include "oops/oop.inline.hpp" 29 #include "runtime/interfaceSupport.hpp" 30 #include "runtime/sharedRuntime.hpp" 31 #include "runtime/stubRoutines.hpp" 32 #include "runtime/timer.hpp" 33 #include "utilities/copy.hpp" 34 #ifdef COMPILER2 35 #include "opto/runtime.hpp" 36 #endif 37 38 39 // Implementation of StubRoutines - for a description 40 // of how to extend it, see the header file. 41 42 // Class Variables 43 44 BufferBlob* StubRoutines::_code1 = NULL; 45 BufferBlob* StubRoutines::_code2 = NULL; 46 47 address StubRoutines::_call_stub_return_address = NULL; 48 address StubRoutines::_call_stub_entry = NULL; 49 50 address StubRoutines::_catch_exception_entry = NULL; 51 address StubRoutines::_forward_exception_entry = NULL; 52 address StubRoutines::_throw_AbstractMethodError_entry = NULL; 53 address StubRoutines::_throw_IncompatibleClassChangeError_entry = NULL; 54 address StubRoutines::_throw_NullPointerException_at_call_entry = NULL; 55 address StubRoutines::_throw_StackOverflowError_entry = NULL; 56 address StubRoutines::_handler_for_unsafe_access_entry = NULL; 57 jint StubRoutines::_verify_oop_count = 0; 58 address StubRoutines::_verify_oop_subroutine_entry = NULL; 59 address StubRoutines::_atomic_xchg_entry = NULL; 60 address StubRoutines::_atomic_xchg_ptr_entry = NULL; 61 address StubRoutines::_atomic_store_entry = NULL; 62 address StubRoutines::_atomic_store_ptr_entry = NULL; 63 address StubRoutines::_atomic_cmpxchg_entry = NULL; 64 address StubRoutines::_atomic_cmpxchg_ptr_entry = NULL; 65 address StubRoutines::_atomic_cmpxchg_long_entry = NULL; 66 address StubRoutines::_atomic_add_entry = NULL; 67 address StubRoutines::_atomic_add_ptr_entry = NULL; 68 address StubRoutines::_fence_entry = NULL; 69 address StubRoutines::_d2i_wrapper = NULL; 70 address StubRoutines::_d2l_wrapper = NULL; 71 72 jint StubRoutines::_fpu_cntrl_wrd_std = 0; 73 jint StubRoutines::_fpu_cntrl_wrd_24 = 0; 74 jint StubRoutines::_fpu_cntrl_wrd_64 = 0; 75 jint StubRoutines::_fpu_cntrl_wrd_trunc = 0; 76 jint StubRoutines::_mxcsr_std = 0; 77 jint StubRoutines::_fpu_subnormal_bias1[3] = { 0, 0, 0 }; 78 jint StubRoutines::_fpu_subnormal_bias2[3] = { 0, 0, 0 }; 79 80 // Compiled code entry points default values 81 // The default functions don't have separate disjoint versions. 82 address StubRoutines::_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy); 83 address StubRoutines::_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy); 84 address StubRoutines::_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy); 85 address StubRoutines::_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy); 86 address StubRoutines::_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy); 87 address StubRoutines::_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit); 88 address StubRoutines::_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy); 89 address StubRoutines::_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy); 90 address StubRoutines::_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy); 91 address StubRoutines::_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy); 92 address StubRoutines::_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy); 93 address StubRoutines::_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit); 94 95 address StubRoutines::_arrayof_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy); 96 address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy); 97 address StubRoutines::_arrayof_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy); 98 address StubRoutines::_arrayof_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy); 99 address StubRoutines::_arrayof_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy); 100 address StubRoutines::_arrayof_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit); 101 address StubRoutines::_arrayof_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy); 102 address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy); 103 address StubRoutines::_arrayof_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy); 104 address StubRoutines::_arrayof_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy); 105 address StubRoutines::_arrayof_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy); 106 address StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit); 107 108 address StubRoutines::_zero_aligned_words = CAST_FROM_FN_PTR(address, Copy::zero_to_words); 109 110 address StubRoutines::_checkcast_arraycopy = NULL; 111 address StubRoutines::_checkcast_arraycopy_uninit = NULL; 112 address StubRoutines::_unsafe_arraycopy = NULL; 113 address StubRoutines::_generic_arraycopy = NULL; 114 115 116 address StubRoutines::_jbyte_fill; 117 address StubRoutines::_jshort_fill; 118 address StubRoutines::_jint_fill; 119 address StubRoutines::_arrayof_jbyte_fill; 120 address StubRoutines::_arrayof_jshort_fill; 121 address StubRoutines::_arrayof_jint_fill; 122 123 address StubRoutines::_aescrypt_encryptBlock = NULL; 124 address StubRoutines::_aescrypt_decryptBlock = NULL; 125 address StubRoutines::_cipherBlockChaining_encryptAESCrypt = NULL; 126 address StubRoutines::_cipherBlockChaining_decryptAESCrypt = NULL; 127 128 address StubRoutines::_sha1_implCompress = NULL; 129 address StubRoutines::_sha1_implCompressMB = NULL; 130 address StubRoutines::_sha256_implCompress = NULL; 131 address StubRoutines::_sha256_implCompressMB = NULL; 132 address StubRoutines::_sha512_implCompress = NULL; 133 address StubRoutines::_sha512_implCompressMB = NULL; 134 135 address StubRoutines::_updateBytesCRC32 = NULL; 136 address StubRoutines::_crc_table_adr = NULL; 137 138 double (* StubRoutines::_intrinsic_log )(double) = NULL; 139 double (* StubRoutines::_intrinsic_log10 )(double) = NULL; 140 double (* StubRoutines::_intrinsic_exp )(double) = NULL; 141 double (* StubRoutines::_intrinsic_pow )(double, double) = NULL; 142 double (* StubRoutines::_intrinsic_sin )(double) = NULL; 143 double (* StubRoutines::_intrinsic_cos )(double) = NULL; 144 double (* StubRoutines::_intrinsic_tan )(double) = NULL; 145 146 address StubRoutines::_safefetch32_entry = NULL; 147 address StubRoutines::_safefetch32_fault_pc = NULL; 148 address StubRoutines::_safefetch32_continuation_pc = NULL; 149 address StubRoutines::_safefetchN_entry = NULL; 150 address StubRoutines::_safefetchN_fault_pc = NULL; 151 address StubRoutines::_safefetchN_continuation_pc = NULL; 152 153 // Initialization 154 // 155 // Note: to break cycle with universe initialization, stubs are generated in two phases. 156 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry). 157 // The second phase includes all other stubs (which may depend on universe being initialized.) 158 159 extern void StubGenerator_generate(CodeBuffer* code, bool all); // only interface to generators 160 161 void StubRoutines::initialize1() { 162 if (_code1 == NULL) { 163 ResourceMark rm; 164 TraceTime timer("StubRoutines generation 1", TraceStartupTime); 165 _code1 = BufferBlob::create("StubRoutines (1)", code_size1); 166 if (_code1 == NULL) { 167 vm_exit_out_of_memory(code_size1, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (1)"); 168 } 169 CodeBuffer buffer(_code1); 170 StubGenerator_generate(&buffer, false); 171 } 172 } 173 174 175 #ifdef ASSERT 176 typedef void (*arraycopy_fn)(address src, address dst, int count); 177 178 // simple tests of generated arraycopy functions 179 static void test_arraycopy_func(address func, int alignment) { 180 int v = 0xcc; 181 int v2 = 0x11; 182 jlong lbuffer[8]; 183 jlong lbuffer2[8]; 184 address fbuffer = (address) lbuffer; 185 address fbuffer2 = (address) lbuffer2; 186 unsigned int i; 187 for (i = 0; i < sizeof(lbuffer); i++) { 188 fbuffer[i] = v; fbuffer2[i] = v2; 189 } 190 // C++ does not guarantee jlong[] array alignment to 8 bytes. 191 // Use middle of array to check that memory before it is not modified. 192 address buffer = (address) round_to((intptr_t)&lbuffer[4], BytesPerLong); 193 address buffer2 = (address) round_to((intptr_t)&lbuffer2[4], BytesPerLong); 194 // do an aligned copy 195 ((arraycopy_fn)func)(buffer, buffer2, 0); 196 for (i = 0; i < sizeof(lbuffer); i++) { 197 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); 198 } 199 // adjust destination alignment 200 ((arraycopy_fn)func)(buffer, buffer2 + alignment, 0); 201 for (i = 0; i < sizeof(lbuffer); i++) { 202 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); 203 } 204 // adjust source alignment 205 ((arraycopy_fn)func)(buffer + alignment, buffer2, 0); 206 for (i = 0; i < sizeof(lbuffer); i++) { 207 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); 208 } 209 } 210 #endif 211 212 213 void StubRoutines::initialize2() { 214 if (_code2 == NULL) { 215 ResourceMark rm; 216 TraceTime timer("StubRoutines generation 2", TraceStartupTime); 217 _code2 = BufferBlob::create("StubRoutines (2)", code_size2); 218 if (_code2 == NULL) { 219 vm_exit_out_of_memory(code_size2, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (2)"); 220 } 221 CodeBuffer buffer(_code2); 222 StubGenerator_generate(&buffer, true); 223 } 224 225 #ifdef ASSERT 226 227 #define TEST_ARRAYCOPY(type) \ 228 test_arraycopy_func( type##_arraycopy(), sizeof(type)); \ 229 test_arraycopy_func( type##_disjoint_arraycopy(), sizeof(type)); \ 230 test_arraycopy_func(arrayof_##type##_arraycopy(), sizeof(HeapWord)); \ 231 test_arraycopy_func(arrayof_##type##_disjoint_arraycopy(), sizeof(HeapWord)) 232 233 // Make sure all the arraycopy stubs properly handle zero count 234 TEST_ARRAYCOPY(jbyte); 235 TEST_ARRAYCOPY(jshort); 236 TEST_ARRAYCOPY(jint); 237 TEST_ARRAYCOPY(jlong); 238 239 #undef TEST_ARRAYCOPY 240 241 #define TEST_FILL(type) \ 242 if (_##type##_fill != NULL) { \ 243 union { \ 244 double d; \ 245 type body[96]; \ 246 } s; \ 247 \ 248 int v = 32; \ 249 for (int offset = -2; offset <= 2; offset++) { \ 250 for (int i = 0; i < 96; i++) { \ 251 s.body[i] = 1; \ 252 } \ 253 type* start = s.body + 8 + offset; \ 254 for (int aligned = 0; aligned < 2; aligned++) { \ 255 if (aligned) { \ 256 if (((intptr_t)start) % HeapWordSize == 0) { \ 257 ((void (*)(type*, int, int))StubRoutines::_arrayof_##type##_fill)(start, v, 80); \ 258 } else { \ 259 continue; \ 260 } \ 261 } else { \ 262 ((void (*)(type*, int, int))StubRoutines::_##type##_fill)(start, v, 80); \ 263 } \ 264 for (int i = 0; i < 96; i++) { \ 265 if (i < (8 + offset) || i >= (88 + offset)) { \ 266 assert(s.body[i] == 1, "what?"); \ 267 } else { \ 268 assert(s.body[i] == 32, "what?"); \ 269 } \ 270 } \ 271 } \ 272 } \ 273 } \ 274 275 TEST_FILL(jbyte); 276 TEST_FILL(jshort); 277 TEST_FILL(jint); 278 279 #undef TEST_FILL 280 281 #define TEST_COPYRTN(type) \ 282 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_##type##s_atomic), sizeof(type)); \ 283 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::arrayof_conjoint_##type##s), (int)MAX2(sizeof(HeapWord), sizeof(type))) 284 285 // Make sure all the copy runtime routines properly handle zero count 286 TEST_COPYRTN(jbyte); 287 TEST_COPYRTN(jshort); 288 TEST_COPYRTN(jint); 289 TEST_COPYRTN(jlong); 290 291 #undef TEST_COPYRTN 292 293 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_words), sizeof(HeapWord)); 294 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words), sizeof(HeapWord)); 295 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words_atomic), sizeof(HeapWord)); 296 // Aligned to BytesPerLong 297 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_conjoint_words), sizeof(jlong)); 298 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_disjoint_words), sizeof(jlong)); 299 300 #endif 301 } 302 303 304 void stubRoutines_init1() { StubRoutines::initialize1(); } 305 void stubRoutines_init2() { StubRoutines::initialize2(); } 306 307 // 308 // Default versions of arraycopy functions 309 // 310 311 static void gen_arraycopy_barrier_pre(oop* dest, size_t count, bool dest_uninitialized) { 312 assert(count != 0, "count should be non-zero"); 313 assert(count <= (size_t)max_intx, "count too large"); 314 BarrierSet* bs = Universe::heap()->barrier_set(); 315 assert(bs->has_write_ref_array_pre_opt(), "Must have pre-barrier opt"); 316 bs->write_ref_array_pre(dest, (int)count, dest_uninitialized); 317 } 318 319 static void gen_arraycopy_barrier(oop* dest, size_t count) { 320 assert(count != 0, "count should be non-zero"); 321 BarrierSet* bs = Universe::heap()->barrier_set(); 322 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt"); 323 bs->write_ref_array((HeapWord*)dest, count); 324 } 325 326 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count)) 327 #ifndef PRODUCT 328 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy 329 #endif // !PRODUCT 330 Copy::conjoint_jbytes_atomic(src, dest, count); 331 JRT_END 332 333 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count)) 334 #ifndef PRODUCT 335 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy 336 #endif // !PRODUCT 337 Copy::conjoint_jshorts_atomic(src, dest, count); 338 JRT_END 339 340 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count)) 341 #ifndef PRODUCT 342 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy 343 #endif // !PRODUCT 344 Copy::conjoint_jints_atomic(src, dest, count); 345 JRT_END 346 347 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count)) 348 #ifndef PRODUCT 349 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy 350 #endif // !PRODUCT 351 Copy::conjoint_jlongs_atomic(src, dest, count); 352 JRT_END 353 354 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count)) 355 #ifndef PRODUCT 356 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 357 #endif // !PRODUCT 358 assert(count != 0, "count should be non-zero"); 359 gen_arraycopy_barrier_pre(dest, count, /*dest_uninitialized*/false); 360 Copy::conjoint_oops_atomic(src, dest, count); 361 gen_arraycopy_barrier(dest, count); 362 JRT_END 363 364 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count)) 365 #ifndef PRODUCT 366 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 367 #endif // !PRODUCT 368 assert(count != 0, "count should be non-zero"); 369 gen_arraycopy_barrier_pre(dest, count, /*dest_uninitialized*/true); 370 Copy::conjoint_oops_atomic(src, dest, count); 371 gen_arraycopy_barrier(dest, count); 372 JRT_END 373 374 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count)) 375 #ifndef PRODUCT 376 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy 377 #endif // !PRODUCT 378 Copy::arrayof_conjoint_jbytes(src, dest, count); 379 JRT_END 380 381 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count)) 382 #ifndef PRODUCT 383 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy 384 #endif // !PRODUCT 385 Copy::arrayof_conjoint_jshorts(src, dest, count); 386 JRT_END 387 388 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count)) 389 #ifndef PRODUCT 390 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy 391 #endif // !PRODUCT 392 Copy::arrayof_conjoint_jints(src, dest, count); 393 JRT_END 394 395 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count)) 396 #ifndef PRODUCT 397 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy 398 #endif // !PRODUCT 399 Copy::arrayof_conjoint_jlongs(src, dest, count); 400 JRT_END 401 402 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count)) 403 #ifndef PRODUCT 404 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 405 #endif // !PRODUCT 406 assert(count != 0, "count should be non-zero"); 407 gen_arraycopy_barrier_pre((oop *) dest, count, /*dest_uninitialized*/false); 408 Copy::arrayof_conjoint_oops(src, dest, count); 409 gen_arraycopy_barrier((oop *) dest, count); 410 JRT_END 411 412 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count)) 413 #ifndef PRODUCT 414 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy 415 #endif // !PRODUCT 416 assert(count != 0, "count should be non-zero"); 417 gen_arraycopy_barrier_pre((oop *) dest, count, /*dest_uninitialized*/true); 418 Copy::arrayof_conjoint_oops(src, dest, count); 419 gen_arraycopy_barrier((oop *) dest, count); 420 JRT_END 421 422 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) { 423 #define RETURN_STUB(xxx_fill) { \ 424 name = #xxx_fill; \ 425 return StubRoutines::xxx_fill(); } 426 427 switch (t) { 428 case T_BYTE: 429 case T_BOOLEAN: 430 if (!aligned) RETURN_STUB(jbyte_fill); 431 RETURN_STUB(arrayof_jbyte_fill); 432 case T_CHAR: 433 case T_SHORT: 434 if (!aligned) RETURN_STUB(jshort_fill); 435 RETURN_STUB(arrayof_jshort_fill); 436 case T_INT: 437 case T_FLOAT: 438 if (!aligned) RETURN_STUB(jint_fill); 439 RETURN_STUB(arrayof_jint_fill); 440 case T_DOUBLE: 441 case T_LONG: 442 case T_ARRAY: 443 case T_OBJECT: 444 case T_NARROWOOP: 445 case T_NARROWKLASS: 446 case T_ADDRESS: 447 // Currently unsupported 448 return NULL; 449 450 default: 451 ShouldNotReachHere(); 452 return NULL; 453 } 454 455 #undef RETURN_STUB 456 } 457 458 // constants for computing the copy function 459 enum { 460 COPYFUNC_UNALIGNED = 0, 461 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize 462 COPYFUNC_CONJOINT = 0, 463 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend 464 }; 465 466 // Note: The condition "disjoint" applies also for overlapping copies 467 // where an descending copy is permitted (i.e., dest_offset <= src_offset). 468 address 469 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) { 470 int selector = 471 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) + 472 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT); 473 474 #define RETURN_STUB(xxx_arraycopy) { \ 475 name = #xxx_arraycopy; \ 476 return StubRoutines::xxx_arraycopy(); } 477 478 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \ 479 name = #xxx_arraycopy; \ 480 return StubRoutines::xxx_arraycopy(parm); } 481 482 switch (t) { 483 case T_BYTE: 484 case T_BOOLEAN: 485 switch (selector) { 486 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy); 487 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy); 488 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy); 489 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy); 490 } 491 case T_CHAR: 492 case T_SHORT: 493 switch (selector) { 494 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy); 495 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy); 496 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy); 497 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy); 498 } 499 case T_INT: 500 case T_FLOAT: 501 switch (selector) { 502 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy); 503 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy); 504 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy); 505 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy); 506 } 507 case T_DOUBLE: 508 case T_LONG: 509 switch (selector) { 510 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy); 511 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy); 512 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy); 513 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy); 514 } 515 case T_ARRAY: 516 case T_OBJECT: 517 switch (selector) { 518 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized); 519 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized); 520 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized); 521 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized); 522 } 523 default: 524 ShouldNotReachHere(); 525 return NULL; 526 } 527 528 #undef RETURN_STUB 529 #undef RETURN_STUB_PARM 530 }