1 /*
2 * Copyright (c) 1997, 2015, 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_byte_entry = NULL;
66 address StubRoutines::_atomic_cmpxchg_long_entry = NULL;
67 address StubRoutines::_atomic_add_entry = NULL;
68 address StubRoutines::_atomic_add_ptr_entry = NULL;
69 address StubRoutines::_fence_entry = NULL;
70 address StubRoutines::_d2i_wrapper = NULL;
71 address StubRoutines::_d2l_wrapper = NULL;
72
73 jint StubRoutines::_fpu_cntrl_wrd_std = 0;
74 jint StubRoutines::_fpu_cntrl_wrd_24 = 0;
75 jint StubRoutines::_fpu_cntrl_wrd_64 = 0;
76 jint StubRoutines::_fpu_cntrl_wrd_trunc = 0;
77 jint StubRoutines::_mxcsr_std = 0;
78 jint StubRoutines::_fpu_subnormal_bias1[3] = { 0, 0, 0 };
79 jint StubRoutines::_fpu_subnormal_bias2[3] = { 0, 0, 0 };
80
81 // Compiled code entry points default values
82 // The default functions don't have separate disjoint versions.
83 address StubRoutines::_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
84 address StubRoutines::_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
85 address StubRoutines::_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
86 address StubRoutines::_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
87 address StubRoutines::_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
88 address StubRoutines::_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit);
89 address StubRoutines::_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
90 address StubRoutines::_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
91 address StubRoutines::_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
92 address StubRoutines::_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
93 address StubRoutines::_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
94 address StubRoutines::_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit);
95
96 address StubRoutines::_arrayof_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
97 address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
98 address StubRoutines::_arrayof_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
99 address StubRoutines::_arrayof_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
100 address StubRoutines::_arrayof_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
101 address StubRoutines::_arrayof_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit);
102 address StubRoutines::_arrayof_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
103 address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
104 address StubRoutines::_arrayof_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
105 address StubRoutines::_arrayof_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
106 address StubRoutines::_arrayof_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
107 address StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit);
108
109 address StubRoutines::_zero_aligned_words = CAST_FROM_FN_PTR(address, Copy::zero_to_words);
110
111 address StubRoutines::_checkcast_arraycopy = NULL;
112 address StubRoutines::_checkcast_arraycopy_uninit = NULL;
113 address StubRoutines::_unsafe_arraycopy = NULL;
114 address StubRoutines::_generic_arraycopy = NULL;
115
116
117 address StubRoutines::_jbyte_fill;
118 address StubRoutines::_jshort_fill;
119 address StubRoutines::_jint_fill;
120 address StubRoutines::_arrayof_jbyte_fill;
121 address StubRoutines::_arrayof_jshort_fill;
122 address StubRoutines::_arrayof_jint_fill;
123
124 address StubRoutines::_aescrypt_encryptBlock = NULL;
125 address StubRoutines::_aescrypt_decryptBlock = NULL;
126 address StubRoutines::_cipherBlockChaining_encryptAESCrypt = NULL;
127 address StubRoutines::_cipherBlockChaining_decryptAESCrypt = NULL;
128 address StubRoutines::_ghash_processBlocks = NULL;
129
130 address StubRoutines::_sha1_implCompress = NULL;
131 address StubRoutines::_sha1_implCompressMB = NULL;
132 address StubRoutines::_sha256_implCompress = NULL;
133 address StubRoutines::_sha256_implCompressMB = NULL;
134 address StubRoutines::_sha512_implCompress = NULL;
135 address StubRoutines::_sha512_implCompressMB = NULL;
136
137 address StubRoutines::_updateBytesCRC32 = NULL;
138 address StubRoutines::_crc_table_adr = NULL;
139
140 address StubRoutines::_multiplyToLen = NULL;
141
142 double (* StubRoutines::_intrinsic_log )(double) = NULL;
143 double (* StubRoutines::_intrinsic_log10 )(double) = NULL;
144 double (* StubRoutines::_intrinsic_exp )(double) = NULL;
145 double (* StubRoutines::_intrinsic_pow )(double, double) = NULL;
146 double (* StubRoutines::_intrinsic_sin )(double) = NULL;
147 double (* StubRoutines::_intrinsic_cos )(double) = NULL;
148 double (* StubRoutines::_intrinsic_tan )(double) = NULL;
149
150 address StubRoutines::_safefetch32_entry = NULL;
151 address StubRoutines::_safefetch32_fault_pc = NULL;
152 address StubRoutines::_safefetch32_continuation_pc = NULL;
153 address StubRoutines::_safefetchN_entry = NULL;
154 address StubRoutines::_safefetchN_fault_pc = NULL;
155 address StubRoutines::_safefetchN_continuation_pc = NULL;
156
157 // Initialization
158 //
159 // Note: to break cycle with universe initialization, stubs are generated in two phases.
160 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry).
161 // The second phase includes all other stubs (which may depend on universe being initialized.)
162
163 extern void StubGenerator_generate(CodeBuffer* code, bool all); // only interface to generators
164
165 void StubRoutines::initialize1() {
166 if (_code1 == NULL) {
167 ResourceMark rm;
168 TraceTime timer("StubRoutines generation 1", TraceStartupTime);
169 _code1 = BufferBlob::create("StubRoutines (1)", code_size1);
170 if (_code1 == NULL) {
171 vm_exit_out_of_memory(code_size1, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (1)");
172 }
173 CodeBuffer buffer(_code1);
174 StubGenerator_generate(&buffer, false);
175 }
176 }
177
178
179 #ifdef ASSERT
180 typedef void (*arraycopy_fn)(address src, address dst, int count);
181
182 // simple tests of generated arraycopy functions
183 static void test_arraycopy_func(address func, int alignment) {
184 int v = 0xcc;
185 int v2 = 0x11;
186 jlong lbuffer[8];
187 jlong lbuffer2[8];
188 address fbuffer = (address) lbuffer;
189 address fbuffer2 = (address) lbuffer2;
190 unsigned int i;
191 for (i = 0; i < sizeof(lbuffer); i++) {
192 fbuffer[i] = v; fbuffer2[i] = v2;
193 }
194 // C++ does not guarantee jlong[] array alignment to 8 bytes.
195 // Use middle of array to check that memory before it is not modified.
196 address buffer = (address) round_to((intptr_t)&lbuffer[4], BytesPerLong);
197 address buffer2 = (address) round_to((intptr_t)&lbuffer2[4], BytesPerLong);
198 // do an aligned copy
199 ((arraycopy_fn)func)(buffer, buffer2, 0);
200 for (i = 0; i < sizeof(lbuffer); i++) {
201 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
202 }
203 // adjust destination alignment
204 ((arraycopy_fn)func)(buffer, buffer2 + alignment, 0);
205 for (i = 0; i < sizeof(lbuffer); i++) {
206 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
207 }
208 // adjust source alignment
209 ((arraycopy_fn)func)(buffer + alignment, buffer2, 0);
210 for (i = 0; i < sizeof(lbuffer); i++) {
211 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
212 }
213 }
214 #endif
215
216
217 void StubRoutines::initialize2() {
218 if (_code2 == NULL) {
219 ResourceMark rm;
220 TraceTime timer("StubRoutines generation 2", TraceStartupTime);
221 _code2 = BufferBlob::create("StubRoutines (2)", code_size2);
222 if (_code2 == NULL) {
223 vm_exit_out_of_memory(code_size2, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (2)");
224 }
225 CodeBuffer buffer(_code2);
226 StubGenerator_generate(&buffer, true);
227 }
228
229 #ifdef ASSERT
230
231 #define TEST_ARRAYCOPY(type) \
232 test_arraycopy_func( type##_arraycopy(), sizeof(type)); \
233 test_arraycopy_func( type##_disjoint_arraycopy(), sizeof(type)); \
234 test_arraycopy_func(arrayof_##type##_arraycopy(), sizeof(HeapWord)); \
235 test_arraycopy_func(arrayof_##type##_disjoint_arraycopy(), sizeof(HeapWord))
236
237 // Make sure all the arraycopy stubs properly handle zero count
238 TEST_ARRAYCOPY(jbyte);
239 TEST_ARRAYCOPY(jshort);
240 TEST_ARRAYCOPY(jint);
241 TEST_ARRAYCOPY(jlong);
242
243 #undef TEST_ARRAYCOPY
244
245 #define TEST_FILL(type) \
246 if (_##type##_fill != NULL) { \
247 union { \
248 double d; \
249 type body[96]; \
250 } s; \
251 \
252 int v = 32; \
253 for (int offset = -2; offset <= 2; offset++) { \
254 for (int i = 0; i < 96; i++) { \
255 s.body[i] = 1; \
256 } \
257 type* start = s.body + 8 + offset; \
258 for (int aligned = 0; aligned < 2; aligned++) { \
259 if (aligned) { \
260 if (((intptr_t)start) % HeapWordSize == 0) { \
261 ((void (*)(type*, int, int))StubRoutines::_arrayof_##type##_fill)(start, v, 80); \
262 } else { \
263 continue; \
264 } \
265 } else { \
266 ((void (*)(type*, int, int))StubRoutines::_##type##_fill)(start, v, 80); \
267 } \
268 for (int i = 0; i < 96; i++) { \
269 if (i < (8 + offset) || i >= (88 + offset)) { \
270 assert(s.body[i] == 1, "what?"); \
271 } else { \
272 assert(s.body[i] == 32, "what?"); \
273 } \
274 } \
275 } \
276 } \
277 } \
278
279 TEST_FILL(jbyte);
280 TEST_FILL(jshort);
281 TEST_FILL(jint);
282
283 #undef TEST_FILL
284
285 #define TEST_COPYRTN(type) \
286 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_##type##s_atomic), sizeof(type)); \
287 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::arrayof_conjoint_##type##s), (int)MAX2(sizeof(HeapWord), sizeof(type)))
288
289 // Make sure all the copy runtime routines properly handle zero count
290 TEST_COPYRTN(jbyte);
291 TEST_COPYRTN(jshort);
292 TEST_COPYRTN(jint);
293 TEST_COPYRTN(jlong);
294
295 #undef TEST_COPYRTN
296
297 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_words), sizeof(HeapWord));
298 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words), sizeof(HeapWord));
299 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words_atomic), sizeof(HeapWord));
300 // Aligned to BytesPerLong
301 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_conjoint_words), sizeof(jlong));
302 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_disjoint_words), sizeof(jlong));
303
304 #endif
305 }
306
307
308 void stubRoutines_init1() { StubRoutines::initialize1(); }
309 void stubRoutines_init2() { StubRoutines::initialize2(); }
310
311 //
312 // Default versions of arraycopy functions
313 //
314
315 static void gen_arraycopy_barrier_pre(oop* dest, size_t count, bool dest_uninitialized) {
316 assert(count != 0, "count should be non-zero");
317 assert(count <= (size_t)max_intx, "count too large");
318 BarrierSet* bs = Universe::heap()->barrier_set();
319 assert(bs->has_write_ref_array_pre_opt(), "Must have pre-barrier opt");
320 bs->write_ref_array_pre(dest, (int)count, dest_uninitialized);
321 }
322
323 static void gen_arraycopy_barrier(oop* dest, size_t count) {
324 assert(count != 0, "count should be non-zero");
325 BarrierSet* bs = Universe::heap()->barrier_set();
326 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
327 bs->write_ref_array((HeapWord*)dest, count);
328 }
329
330 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count))
331 #ifndef PRODUCT
332 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
333 #endif // !PRODUCT
334 Copy::conjoint_jbytes_atomic(src, dest, count);
335 JRT_END
336
337 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count))
338 #ifndef PRODUCT
339 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
340 #endif // !PRODUCT
341 Copy::conjoint_jshorts_atomic(src, dest, count);
342 JRT_END
343
344 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count))
345 #ifndef PRODUCT
346 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
347 #endif // !PRODUCT
348 Copy::conjoint_jints_atomic(src, dest, count);
349 JRT_END
350
351 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count))
352 #ifndef PRODUCT
353 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy
354 #endif // !PRODUCT
355 Copy::conjoint_jlongs_atomic(src, dest, count);
356 JRT_END
357
358 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count))
359 #ifndef PRODUCT
360 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
361 #endif // !PRODUCT
362 assert(count != 0, "count should be non-zero");
363 gen_arraycopy_barrier_pre(dest, count, /*dest_uninitialized*/false);
364 Copy::conjoint_oops_atomic(src, dest, count);
365 gen_arraycopy_barrier(dest, count);
366 JRT_END
367
368 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count))
369 #ifndef PRODUCT
370 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
371 #endif // !PRODUCT
372 assert(count != 0, "count should be non-zero");
373 gen_arraycopy_barrier_pre(dest, count, /*dest_uninitialized*/true);
374 Copy::conjoint_oops_atomic(src, dest, count);
375 gen_arraycopy_barrier(dest, count);
376 JRT_END
377
378 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count))
379 #ifndef PRODUCT
380 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
381 #endif // !PRODUCT
382 Copy::arrayof_conjoint_jbytes(src, dest, count);
383 JRT_END
384
385 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count))
386 #ifndef PRODUCT
387 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
388 #endif // !PRODUCT
389 Copy::arrayof_conjoint_jshorts(src, dest, count);
390 JRT_END
391
392 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count))
393 #ifndef PRODUCT
394 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
395 #endif // !PRODUCT
396 Copy::arrayof_conjoint_jints(src, dest, count);
397 JRT_END
398
399 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count))
400 #ifndef PRODUCT
401 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy
402 #endif // !PRODUCT
403 Copy::arrayof_conjoint_jlongs(src, dest, count);
404 JRT_END
405
406 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count))
407 #ifndef PRODUCT
408 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
409 #endif // !PRODUCT
410 assert(count != 0, "count should be non-zero");
411 gen_arraycopy_barrier_pre((oop *) dest, count, /*dest_uninitialized*/false);
412 Copy::arrayof_conjoint_oops(src, dest, count);
413 gen_arraycopy_barrier((oop *) dest, count);
414 JRT_END
415
416 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count))
417 #ifndef PRODUCT
418 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
419 #endif // !PRODUCT
420 assert(count != 0, "count should be non-zero");
421 gen_arraycopy_barrier_pre((oop *) dest, count, /*dest_uninitialized*/true);
422 Copy::arrayof_conjoint_oops(src, dest, count);
423 gen_arraycopy_barrier((oop *) dest, count);
424 JRT_END
425
426 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) {
427 #define RETURN_STUB(xxx_fill) { \
428 name = #xxx_fill; \
429 return StubRoutines::xxx_fill(); }
430
431 switch (t) {
432 case T_BYTE:
433 case T_BOOLEAN:
434 if (!aligned) RETURN_STUB(jbyte_fill);
435 RETURN_STUB(arrayof_jbyte_fill);
436 case T_CHAR:
437 case T_SHORT:
438 if (!aligned) RETURN_STUB(jshort_fill);
439 RETURN_STUB(arrayof_jshort_fill);
440 case T_INT:
441 case T_FLOAT:
442 if (!aligned) RETURN_STUB(jint_fill);
443 RETURN_STUB(arrayof_jint_fill);
444 case T_DOUBLE:
445 case T_LONG:
446 case T_ARRAY:
447 case T_OBJECT:
448 case T_NARROWOOP:
449 case T_NARROWKLASS:
450 case T_ADDRESS:
451 // Currently unsupported
452 return NULL;
453
454 default:
455 ShouldNotReachHere();
456 return NULL;
457 }
458
459 #undef RETURN_STUB
460 }
461
462 // constants for computing the copy function
463 enum {
464 COPYFUNC_UNALIGNED = 0,
465 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize
466 COPYFUNC_CONJOINT = 0,
467 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend
468 };
469
470 // Note: The condition "disjoint" applies also for overlapping copies
471 // where an descending copy is permitted (i.e., dest_offset <= src_offset).
472 address
473 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) {
474 int selector =
475 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) +
476 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT);
477
478 #define RETURN_STUB(xxx_arraycopy) { \
479 name = #xxx_arraycopy; \
480 return StubRoutines::xxx_arraycopy(); }
481
482 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \
483 name = #xxx_arraycopy; \
484 return StubRoutines::xxx_arraycopy(parm); }
485
486 switch (t) {
487 case T_BYTE:
488 case T_BOOLEAN:
489 switch (selector) {
490 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy);
491 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy);
492 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy);
493 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy);
494 }
495 case T_CHAR:
496 case T_SHORT:
497 switch (selector) {
498 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy);
499 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy);
500 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy);
501 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy);
502 }
503 case T_INT:
504 case T_FLOAT:
505 switch (selector) {
506 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy);
507 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy);
508 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy);
509 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy);
510 }
511 case T_DOUBLE:
512 case T_LONG:
513 switch (selector) {
514 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy);
515 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy);
516 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy);
517 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy);
518 }
519 case T_ARRAY:
520 case T_OBJECT:
521 switch (selector) {
522 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized);
523 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized);
524 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized);
525 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized);
526 }
527 default:
528 ShouldNotReachHere();
529 return NULL;
530 }
531
532 #undef RETURN_STUB
533 #undef RETURN_STUB_PARM
534 }