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 address StubRoutines::_ghash_processBlocks = NULL;
128
129 address StubRoutines::_sha1_implCompress = NULL;
130 address StubRoutines::_sha1_implCompressMB = NULL;
131 address StubRoutines::_sha256_implCompress = NULL;
132 address StubRoutines::_sha256_implCompressMB = NULL;
133 address StubRoutines::_sha512_implCompress = NULL;
134 address StubRoutines::_sha512_implCompressMB = NULL;
135
136 address StubRoutines::_updateBytesCRC32 = NULL;
137 address StubRoutines::_crc_table_adr = NULL;
138
139 address StubRoutines::_multiplyToLen = NULL;
140 address StubRoutines::_squareToLen = NULL;
141 address StubRoutines::_mulAdd = NULL;
142 address StubRoutines::_montgomeryMultiply = NULL;
143 address StubRoutines::_montgomerySquare = NULL;
144
145 double (* StubRoutines::_intrinsic_log )(double) = NULL;
146 double (* StubRoutines::_intrinsic_log10 )(double) = NULL;
147 double (* StubRoutines::_intrinsic_exp )(double) = NULL;
148 double (* StubRoutines::_intrinsic_pow )(double, double) = NULL;
149 double (* StubRoutines::_intrinsic_sin )(double) = NULL;
150 double (* StubRoutines::_intrinsic_cos )(double) = NULL;
151 double (* StubRoutines::_intrinsic_tan )(double) = NULL;
152
153 address StubRoutines::_safefetch32_entry = NULL;
154 address StubRoutines::_safefetch32_fault_pc = NULL;
155 address StubRoutines::_safefetch32_continuation_pc = NULL;
156 address StubRoutines::_safefetchN_entry = NULL;
157 address StubRoutines::_safefetchN_fault_pc = NULL;
158 address StubRoutines::_safefetchN_continuation_pc = NULL;
159
160 // Initialization
161 //
162 // Note: to break cycle with universe initialization, stubs are generated in two phases.
163 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry).
164 // The second phase includes all other stubs (which may depend on universe being initialized.)
165
166 extern void StubGenerator_generate(CodeBuffer* code, bool all); // only interface to generators
167
168 void StubRoutines::initialize1() {
169 if (_code1 == NULL) {
170 ResourceMark rm;
171 TraceTime timer("StubRoutines generation 1", TraceStartupTime);
172 _code1 = BufferBlob::create("StubRoutines (1)", code_size1);
173 if (_code1 == NULL) {
174 vm_exit_out_of_memory(code_size1, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (1)");
175 }
176 CodeBuffer buffer(_code1);
177 StubGenerator_generate(&buffer, false);
178 // When new stubs added we need to make sure there is some space left
179 // to catch situation when we should increase size again.
180 assert(buffer.insts_remaining() > 200, "increase code_size1");
181 }
182 }
183
184
185 #ifdef ASSERT
186 typedef void (*arraycopy_fn)(address src, address dst, int count);
187
188 // simple tests of generated arraycopy functions
189 static void test_arraycopy_func(address func, int alignment) {
190 int v = 0xcc;
191 int v2 = 0x11;
192 jlong lbuffer[8];
193 jlong lbuffer2[8];
194 address fbuffer = (address) lbuffer;
195 address fbuffer2 = (address) lbuffer2;
196 unsigned int i;
197 for (i = 0; i < sizeof(lbuffer); i++) {
198 fbuffer[i] = v; fbuffer2[i] = v2;
199 }
200 // C++ does not guarantee jlong[] array alignment to 8 bytes.
201 // Use middle of array to check that memory before it is not modified.
202 address buffer = (address) round_to((intptr_t)&lbuffer[4], BytesPerLong);
203 address buffer2 = (address) round_to((intptr_t)&lbuffer2[4], BytesPerLong);
204 // do an aligned copy
205 ((arraycopy_fn)func)(buffer, 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 // adjust destination alignment
210 ((arraycopy_fn)func)(buffer, buffer2 + alignment, 0);
211 for (i = 0; i < sizeof(lbuffer); i++) {
212 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
213 }
214 // adjust source alignment
215 ((arraycopy_fn)func)(buffer + alignment, buffer2, 0);
216 for (i = 0; i < sizeof(lbuffer); i++) {
217 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
218 }
219 }
220 #endif
221
222
223 void StubRoutines::initialize2() {
224 if (_code2 == NULL) {
225 ResourceMark rm;
226 TraceTime timer("StubRoutines generation 2", TraceStartupTime);
227 _code2 = BufferBlob::create("StubRoutines (2)", code_size2);
228 if (_code2 == NULL) {
229 vm_exit_out_of_memory(code_size2, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (2)");
230 }
231 CodeBuffer buffer(_code2);
232 StubGenerator_generate(&buffer, true);
233 // When new stubs added we need to make sure there is some space left
234 // to catch situation when we should increase size again.
235 assert(buffer.insts_remaining() > 200, "increase code_size2");
236 }
237
238 #ifdef ASSERT
239
240 #define TEST_ARRAYCOPY(type) \
241 test_arraycopy_func( type##_arraycopy(), sizeof(type)); \
242 test_arraycopy_func( type##_disjoint_arraycopy(), sizeof(type)); \
243 test_arraycopy_func(arrayof_##type##_arraycopy(), sizeof(HeapWord)); \
244 test_arraycopy_func(arrayof_##type##_disjoint_arraycopy(), sizeof(HeapWord))
245
246 // Make sure all the arraycopy stubs properly handle zero count
247 TEST_ARRAYCOPY(jbyte);
248 TEST_ARRAYCOPY(jshort);
249 TEST_ARRAYCOPY(jint);
250 TEST_ARRAYCOPY(jlong);
251
252 #undef TEST_ARRAYCOPY
253
254 #define TEST_FILL(type) \
255 if (_##type##_fill != NULL) { \
256 union { \
257 double d; \
258 type body[96]; \
259 } s; \
260 \
261 int v = 32; \
262 for (int offset = -2; offset <= 2; offset++) { \
263 for (int i = 0; i < 96; i++) { \
264 s.body[i] = 1; \
265 } \
266 type* start = s.body + 8 + offset; \
267 for (int aligned = 0; aligned < 2; aligned++) { \
268 if (aligned) { \
269 if (((intptr_t)start) % HeapWordSize == 0) { \
270 ((void (*)(type*, int, int))StubRoutines::_arrayof_##type##_fill)(start, v, 80); \
271 } else { \
272 continue; \
273 } \
274 } else { \
275 ((void (*)(type*, int, int))StubRoutines::_##type##_fill)(start, v, 80); \
276 } \
277 for (int i = 0; i < 96; i++) { \
278 if (i < (8 + offset) || i >= (88 + offset)) { \
279 assert(s.body[i] == 1, "what?"); \
280 } else { \
281 assert(s.body[i] == 32, "what?"); \
282 } \
283 } \
284 } \
285 } \
286 } \
287
288 TEST_FILL(jbyte);
289 TEST_FILL(jshort);
290 TEST_FILL(jint);
291
292 #undef TEST_FILL
293
294 #define TEST_COPYRTN(type) \
295 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_##type##s_atomic), sizeof(type)); \
296 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::arrayof_conjoint_##type##s), (int)MAX2(sizeof(HeapWord), sizeof(type)))
297
298 // Make sure all the copy runtime routines properly handle zero count
299 TEST_COPYRTN(jbyte);
300 TEST_COPYRTN(jshort);
301 TEST_COPYRTN(jint);
302 TEST_COPYRTN(jlong);
303
304 #undef TEST_COPYRTN
305
306 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_words), sizeof(HeapWord));
307 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words), sizeof(HeapWord));
308 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words_atomic), sizeof(HeapWord));
309 // Aligned to BytesPerLong
310 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_conjoint_words), sizeof(jlong));
311 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_disjoint_words), sizeof(jlong));
312
313 #endif
314 }
315
316
317 void stubRoutines_init1() { StubRoutines::initialize1(); }
318 void stubRoutines_init2() { StubRoutines::initialize2(); }
319
320 //
321 // Default versions of arraycopy functions
322 //
323
324 static void gen_arraycopy_barrier_pre(oop* dest, size_t count, bool dest_uninitialized) {
325 assert(count != 0, "count should be non-zero");
326 assert(count <= (size_t)max_intx, "count too large");
327 BarrierSet* bs = Universe::heap()->barrier_set();
328 assert(bs->has_write_ref_array_pre_opt(), "Must have pre-barrier opt");
329 bs->write_ref_array_pre(dest, (int)count, dest_uninitialized);
330 }
331
332 static void gen_arraycopy_barrier(oop* dest, size_t count) {
333 assert(count != 0, "count should be non-zero");
334 BarrierSet* bs = Universe::heap()->barrier_set();
335 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
336 bs->write_ref_array((HeapWord*)dest, count);
337 }
338
339 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count))
340 #ifndef PRODUCT
341 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
342 #endif // !PRODUCT
343 Copy::conjoint_jbytes_atomic(src, dest, count);
344 JRT_END
345
346 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count))
347 #ifndef PRODUCT
348 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
349 #endif // !PRODUCT
350 Copy::conjoint_jshorts_atomic(src, dest, count);
351 JRT_END
352
353 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count))
354 #ifndef PRODUCT
355 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
356 #endif // !PRODUCT
357 Copy::conjoint_jints_atomic(src, dest, count);
358 JRT_END
359
360 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count))
361 #ifndef PRODUCT
362 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy
363 #endif // !PRODUCT
364 Copy::conjoint_jlongs_atomic(src, dest, count);
365 JRT_END
366
367 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count))
368 #ifndef PRODUCT
369 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
370 #endif // !PRODUCT
371 assert(count != 0, "count should be non-zero");
372 gen_arraycopy_barrier_pre(dest, count, /*dest_uninitialized*/false);
373 Copy::conjoint_oops_atomic(src, dest, count);
374 gen_arraycopy_barrier(dest, count);
375 JRT_END
376
377 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count))
378 #ifndef PRODUCT
379 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
380 #endif // !PRODUCT
381 assert(count != 0, "count should be non-zero");
382 gen_arraycopy_barrier_pre(dest, count, /*dest_uninitialized*/true);
383 Copy::conjoint_oops_atomic(src, dest, count);
384 gen_arraycopy_barrier(dest, count);
385 JRT_END
386
387 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count))
388 #ifndef PRODUCT
389 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
390 #endif // !PRODUCT
391 Copy::arrayof_conjoint_jbytes(src, dest, count);
392 JRT_END
393
394 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count))
395 #ifndef PRODUCT
396 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
397 #endif // !PRODUCT
398 Copy::arrayof_conjoint_jshorts(src, dest, count);
399 JRT_END
400
401 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count))
402 #ifndef PRODUCT
403 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
404 #endif // !PRODUCT
405 Copy::arrayof_conjoint_jints(src, dest, count);
406 JRT_END
407
408 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count))
409 #ifndef PRODUCT
410 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy
411 #endif // !PRODUCT
412 Copy::arrayof_conjoint_jlongs(src, dest, count);
413 JRT_END
414
415 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count))
416 #ifndef PRODUCT
417 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
418 #endif // !PRODUCT
419 assert(count != 0, "count should be non-zero");
420 gen_arraycopy_barrier_pre((oop *) dest, count, /*dest_uninitialized*/false);
421 Copy::arrayof_conjoint_oops(src, dest, count);
422 gen_arraycopy_barrier((oop *) dest, count);
423 JRT_END
424
425 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count))
426 #ifndef PRODUCT
427 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
428 #endif // !PRODUCT
429 assert(count != 0, "count should be non-zero");
430 gen_arraycopy_barrier_pre((oop *) dest, count, /*dest_uninitialized*/true);
431 Copy::arrayof_conjoint_oops(src, dest, count);
432 gen_arraycopy_barrier((oop *) dest, count);
433 JRT_END
434
435 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) {
436 #define RETURN_STUB(xxx_fill) { \
437 name = #xxx_fill; \
438 return StubRoutines::xxx_fill(); }
439
440 switch (t) {
441 case T_BYTE:
442 case T_BOOLEAN:
443 if (!aligned) RETURN_STUB(jbyte_fill);
444 RETURN_STUB(arrayof_jbyte_fill);
445 case T_CHAR:
446 case T_SHORT:
447 if (!aligned) RETURN_STUB(jshort_fill);
448 RETURN_STUB(arrayof_jshort_fill);
449 case T_INT:
450 case T_FLOAT:
451 if (!aligned) RETURN_STUB(jint_fill);
452 RETURN_STUB(arrayof_jint_fill);
453 case T_DOUBLE:
454 case T_LONG:
455 case T_ARRAY:
456 case T_OBJECT:
457 case T_NARROWOOP:
458 case T_NARROWKLASS:
459 case T_ADDRESS:
460 // Currently unsupported
461 return NULL;
462
463 default:
464 ShouldNotReachHere();
465 return NULL;
466 }
467
468 #undef RETURN_STUB
469 }
470
471 // constants for computing the copy function
472 enum {
473 COPYFUNC_UNALIGNED = 0,
474 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize
475 COPYFUNC_CONJOINT = 0,
476 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend
477 };
478
479 // Note: The condition "disjoint" applies also for overlapping copies
480 // where an descending copy is permitted (i.e., dest_offset <= src_offset).
481 address
482 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) {
483 int selector =
484 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) +
485 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT);
486
487 #define RETURN_STUB(xxx_arraycopy) { \
488 name = #xxx_arraycopy; \
489 return StubRoutines::xxx_arraycopy(); }
490
491 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \
492 name = #xxx_arraycopy; \
493 return StubRoutines::xxx_arraycopy(parm); }
494
495 switch (t) {
496 case T_BYTE:
497 case T_BOOLEAN:
498 switch (selector) {
499 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy);
500 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy);
501 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy);
502 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy);
503 }
504 case T_CHAR:
505 case T_SHORT:
506 switch (selector) {
507 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy);
508 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy);
509 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy);
510 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy);
511 }
512 case T_INT:
513 case T_FLOAT:
514 switch (selector) {
515 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy);
516 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy);
517 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy);
518 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy);
519 }
520 case T_DOUBLE:
521 case T_LONG:
522 switch (selector) {
523 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy);
524 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy);
525 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy);
526 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy);
527 }
528 case T_ARRAY:
529 case T_OBJECT:
530 switch (selector) {
531 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized);
532 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized);
533 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized);
534 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized);
535 }
536 default:
537 ShouldNotReachHere();
538 return NULL;
539 }
540
541 #undef RETURN_STUB
542 #undef RETURN_STUB_PARM
543 }