1 /*
2 * Copyright (c) 2020, 2025, 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 "classfile/vmIntrinsics.hpp"
26 #include "classfile/vmSymbols.hpp"
27 #include "compiler/compilerDirectives.hpp"
28 #include "jvm_constants.h"
29 #include "jvm_io.h"
30 #ifdef COMPILER2
31 #include "opto/c2_globals.hpp"
32 #endif
33 #include "runtime/vm_version.hpp"
34 #include "utilities/checkedCast.hpp"
35 #include "utilities/tribool.hpp"
36
37 // These are flag-matching functions:
38 inline bool match_F_R(u2 flags) {
39 const int req = 0;
40 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED | JVM_ACC_NATIVE;
41 return (flags & (req | neg)) == req;
42 }
43
44 inline bool match_F_Y(u2 flags) {
45 const int req = JVM_ACC_SYNCHRONIZED;
46 const int neg = JVM_ACC_STATIC | JVM_ACC_NATIVE;
47 return (flags & (req | neg)) == req;
48 }
49
50 inline bool match_F_RN(u2 flags) {
51 const int req = JVM_ACC_NATIVE;
52 const int neg = JVM_ACC_STATIC | JVM_ACC_SYNCHRONIZED;
53 return (flags & (req | neg)) == req;
54 }
55
56 inline bool match_F_S(u2 flags) {
57 const int req = JVM_ACC_STATIC;
58 const int neg = JVM_ACC_SYNCHRONIZED | JVM_ACC_NATIVE;
59 return (flags & (req | neg)) == req;
60 }
61
62 inline bool match_F_SN(u2 flags) {
63 const int req = JVM_ACC_STATIC | JVM_ACC_NATIVE;
64 const int neg = JVM_ACC_SYNCHRONIZED;
65 return (flags & (req | neg)) == req;
66 }
67
68 bool vmIntrinsics::preserves_state(vmIntrinsics::ID id) {
69 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
70 switch(id) {
71 #ifdef JFR_HAVE_INTRINSICS
72 case vmIntrinsics::_counterTime:
73 #endif
74 case vmIntrinsics::_currentTimeMillis:
75 case vmIntrinsics::_nanoTime:
76 case vmIntrinsics::_floatToRawIntBits:
77 case vmIntrinsics::_intBitsToFloat:
78 case vmIntrinsics::_doubleToRawLongBits:
79 case vmIntrinsics::_longBitsToDouble:
80 case vmIntrinsics::_getClass:
81 case vmIntrinsics::_isInstance:
82 case vmIntrinsics::_currentCarrierThread:
83 case vmIntrinsics::_currentThread:
84 case vmIntrinsics::_scopedValueCache:
85 case vmIntrinsics::_dabs:
86 case vmIntrinsics::_fabs:
87 case vmIntrinsics::_iabs:
88 case vmIntrinsics::_labs:
89 case vmIntrinsics::_dsqrt:
90 case vmIntrinsics::_dsqrt_strict:
91 case vmIntrinsics::_dsin:
92 case vmIntrinsics::_dcos:
93 case vmIntrinsics::_dtan:
94 case vmIntrinsics::_dtanh:
95 case vmIntrinsics::_dcbrt:
96 case vmIntrinsics::_dlog:
97 case vmIntrinsics::_dlog10:
98 case vmIntrinsics::_dexp:
99 case vmIntrinsics::_dpow:
100 case vmIntrinsics::_Preconditions_checkIndex:
101 case vmIntrinsics::_Preconditions_checkLongIndex:
102 case vmIntrinsics::_Reference_get0:
103 case vmIntrinsics::_Continuation_doYield:
104 case vmIntrinsics::_updateCRC32:
105 case vmIntrinsics::_updateBytesCRC32:
106 case vmIntrinsics::_updateByteBufferCRC32:
107 case vmIntrinsics::_updateBytesAdler32:
108 case vmIntrinsics::_vectorizedMismatch:
109 case vmIntrinsics::_fmaD:
110 case vmIntrinsics::_fmaF:
111 case vmIntrinsics::_isDigit:
112 case vmIntrinsics::_isLowerCase:
113 case vmIntrinsics::_isUpperCase:
114 case vmIntrinsics::_isWhitespace:
115 return true;
116 default:
117 return false;
118 }
119 }
120
121 bool vmIntrinsics::can_trap(vmIntrinsics::ID id) {
122 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
123 switch(id) {
124 #ifdef JFR_HAVE_INTRINSICS
125 case vmIntrinsics::_counterTime:
126 #endif
127 case vmIntrinsics::_currentTimeMillis:
128 case vmIntrinsics::_nanoTime:
129 case vmIntrinsics::_floatToRawIntBits:
130 case vmIntrinsics::_intBitsToFloat:
131 case vmIntrinsics::_doubleToRawLongBits:
132 case vmIntrinsics::_longBitsToDouble:
133 case vmIntrinsics::_currentCarrierThread:
134 case vmIntrinsics::_currentThread:
135 case vmIntrinsics::_setCurrentThread:
136 case vmIntrinsics::_scopedValueCache:
137 case vmIntrinsics::_setScopedValueCache:
138 case vmIntrinsics::_dabs:
139 case vmIntrinsics::_fabs:
140 case vmIntrinsics::_iabs:
141 case vmIntrinsics::_labs:
142 case vmIntrinsics::_dsqrt:
143 case vmIntrinsics::_dsqrt_strict:
144 case vmIntrinsics::_dsin:
145 case vmIntrinsics::_dcos:
146 case vmIntrinsics::_dtan:
147 case vmIntrinsics::_dtanh:
148 case vmIntrinsics::_dcbrt:
149 case vmIntrinsics::_dlog:
150 case vmIntrinsics::_dlog10:
151 case vmIntrinsics::_dexp:
152 case vmIntrinsics::_dpow:
153 case vmIntrinsics::_updateCRC32:
154 case vmIntrinsics::_updateBytesCRC32:
155 case vmIntrinsics::_updateByteBufferCRC32:
156 case vmIntrinsics::_vectorizedMismatch:
157 case vmIntrinsics::_fmaD:
158 case vmIntrinsics::_fmaF:
159 return false;
160 default:
161 return true;
162 }
163 }
164
165 // Some intrinsics produce different results if they are not pinned
166 bool vmIntrinsics::should_be_pinned(vmIntrinsics::ID id) {
167 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
168 switch(id) {
169 #ifdef JFR_HAVE_INTRINSICS
170 case vmIntrinsics::_counterTime:
171 #endif
172 case vmIntrinsics::_currentTimeMillis:
173 case vmIntrinsics::_nanoTime:
174 case vmIntrinsics::_blackhole:
175 return true;
176 default:
177 return false;
178 }
179 }
180
181 bool vmIntrinsics::does_virtual_dispatch(vmIntrinsics::ID id) {
182 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
183 switch(id) {
184 case vmIntrinsics::_hashCode:
185 case vmIntrinsics::_clone:
186 return true;
187 break;
188 default:
189 return false;
190 }
191 }
192
193 int vmIntrinsics::predicates_needed(vmIntrinsics::ID id) {
194 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
195 switch (id) {
196 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt:
197 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt:
198 case vmIntrinsics::_electronicCodeBook_encryptAESCrypt:
199 case vmIntrinsics::_electronicCodeBook_decryptAESCrypt:
200 case vmIntrinsics::_counterMode_AESCrypt:
201 case vmIntrinsics::_galoisCounterMode_AESCrypt:
202 return 1;
203 case vmIntrinsics::_digestBase_implCompressMB:
204 return 5;
205 default:
206 return 0;
207 }
208 }
209
210 bool vmIntrinsics::disabled_by_jvm_flags(vmIntrinsics::ID id) {
211 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
212
213 // -XX:-InlineNatives disables nearly all intrinsics except the ones listed in
214 // the following switch statement.
215 if (!InlineNatives) {
216 switch (id) {
217 case vmIntrinsics::_indexOfL:
218 case vmIntrinsics::_indexOfU:
219 case vmIntrinsics::_indexOfUL:
220 case vmIntrinsics::_indexOfIL:
221 case vmIntrinsics::_indexOfIU:
222 case vmIntrinsics::_indexOfIUL:
223 case vmIntrinsics::_indexOfU_char:
224 case vmIntrinsics::_indexOfL_char:
225 case vmIntrinsics::_compareToL:
226 case vmIntrinsics::_compareToU:
227 case vmIntrinsics::_compareToLU:
228 case vmIntrinsics::_compareToUL:
229 case vmIntrinsics::_equalsL:
230 case vmIntrinsics::_equalsC:
231 case vmIntrinsics::_vectorizedHashCode:
232 case vmIntrinsics::_getCharStringU:
233 case vmIntrinsics::_putCharStringU:
234 case vmIntrinsics::_compressStringC:
235 case vmIntrinsics::_compressStringB:
236 case vmIntrinsics::_inflateStringC:
237 case vmIntrinsics::_inflateStringB:
238 case vmIntrinsics::_getAndAddInt:
239 case vmIntrinsics::_getAndAddLong:
240 case vmIntrinsics::_getAndSetInt:
241 case vmIntrinsics::_getAndSetLong:
242 case vmIntrinsics::_getAndSetReference:
243 case vmIntrinsics::_loadFence:
244 case vmIntrinsics::_storeFence:
245 case vmIntrinsics::_fullFence:
246 case vmIntrinsics::_countPositives:
247 case vmIntrinsics::_Reference_get0:
248 case vmIntrinsics::_Continuation_doYield:
249 case vmIntrinsics::_Continuation_enterSpecial:
250 case vmIntrinsics::_Continuation_pin:
251 case vmIntrinsics::_Continuation_unpin:
252 break;
253 default:
254 return true;
255 }
256 }
257
258 switch (id) {
259 case vmIntrinsics::_isInstance:
260 case vmIntrinsics::_isAssignableFrom:
261 case vmIntrinsics::_isHidden:
262 case vmIntrinsics::_getSuperclass:
263 case vmIntrinsics::_Class_cast:
264 case vmIntrinsics::_getLength:
265 case vmIntrinsics::_newArray:
266 case vmIntrinsics::_newNullRestrictedNonAtomicArray:
267 case vmIntrinsics::_newNullRestrictedAtomicArray:
268 case vmIntrinsics::_newNullableAtomicArray:
269 case vmIntrinsics::_getClass:
270 if (!InlineClassNatives) return true;
271 break;
272 case vmIntrinsics::_currentCarrierThread:
273 case vmIntrinsics::_currentThread:
274 if (!InlineThreadNatives) return true;
275 break;
276 case vmIntrinsics::_setCurrentThread:
277 case vmIntrinsics::_scopedValueCache:
278 case vmIntrinsics::_setScopedValueCache:
279 case vmIntrinsics::_floatToRawIntBits:
280 case vmIntrinsics::_intBitsToFloat:
281 case vmIntrinsics::_doubleToRawLongBits:
282 case vmIntrinsics::_longBitsToDouble:
283 case vmIntrinsics::_ceil:
284 case vmIntrinsics::_floor:
285 case vmIntrinsics::_rint:
286 case vmIntrinsics::_dabs:
287 case vmIntrinsics::_fabs:
288 case vmIntrinsics::_iabs:
289 case vmIntrinsics::_labs:
290 case vmIntrinsics::_dsqrt:
291 case vmIntrinsics::_dsqrt_strict:
292 case vmIntrinsics::_dsin:
293 case vmIntrinsics::_dcos:
294 case vmIntrinsics::_dtan:
295 case vmIntrinsics::_dlog:
296 case vmIntrinsics::_dexp:
297 case vmIntrinsics::_dpow:
298 case vmIntrinsics::_dlog10:
299 case vmIntrinsics::_datan2:
300 case vmIntrinsics::_floatToIntBits:
301 case vmIntrinsics::_doubleToLongBits:
302 case vmIntrinsics::_min:
303 case vmIntrinsics::_max:
304 case vmIntrinsics::_maxF:
305 case vmIntrinsics::_minF:
306 case vmIntrinsics::_maxD:
307 case vmIntrinsics::_minD:
308 case vmIntrinsics::_min_strict:
309 case vmIntrinsics::_max_strict:
310 case vmIntrinsics::_maxF_strict:
311 case vmIntrinsics::_minF_strict:
312 case vmIntrinsics::_maxD_strict:
313 case vmIntrinsics::_minD_strict:
314 if (!InlineMathNatives) return true;
315 break;
316 case vmIntrinsics::_fmaD:
317 case vmIntrinsics::_fmaF:
318 if (!InlineMathNatives || !UseFMA) return true;
319 break;
320 case vmIntrinsics::_dtanh:
321 case vmIntrinsics::_dcbrt:
322 if (!InlineMathNatives || !InlineIntrinsics) return true;
323 #if defined(AMD64) && (defined(COMPILER1) || defined(COMPILER2))
324 if (!UseLibmIntrinsic) return true;
325 #endif
326 break;
327 case vmIntrinsics::_floatToFloat16:
328 case vmIntrinsics::_float16ToFloat:
329 if (!InlineIntrinsics) return true;
330 break;
331 case vmIntrinsics::_arraycopy:
332 if (!InlineArrayCopy) return true;
333 break;
334 case vmIntrinsics::_updateCRC32:
335 case vmIntrinsics::_updateBytesCRC32:
336 case vmIntrinsics::_updateByteBufferCRC32:
337 if (!UseCRC32Intrinsics) return true;
338 break;
339 case vmIntrinsics::_makePrivateBuffer:
340 case vmIntrinsics::_finishPrivateBuffer:
341 case vmIntrinsics::_getReference:
342 case vmIntrinsics::_getBoolean:
343 case vmIntrinsics::_getByte:
344 case vmIntrinsics::_getShort:
345 case vmIntrinsics::_getChar:
346 case vmIntrinsics::_getInt:
347 case vmIntrinsics::_getLong:
348 case vmIntrinsics::_getFloat:
349 case vmIntrinsics::_getDouble:
350 case vmIntrinsics::_getValue:
351 case vmIntrinsics::_getFlatValue:
352 case vmIntrinsics::_putReference:
353 case vmIntrinsics::_putBoolean:
354 case vmIntrinsics::_putByte:
355 case vmIntrinsics::_putShort:
356 case vmIntrinsics::_putChar:
357 case vmIntrinsics::_putInt:
358 case vmIntrinsics::_putLong:
359 case vmIntrinsics::_putFloat:
360 case vmIntrinsics::_putDouble:
361 case vmIntrinsics::_putValue:
362 case vmIntrinsics::_putFlatValue:
363 case vmIntrinsics::_getReferenceVolatile:
364 case vmIntrinsics::_getBooleanVolatile:
365 case vmIntrinsics::_getByteVolatile:
366 case vmIntrinsics::_getShortVolatile:
367 case vmIntrinsics::_getCharVolatile:
368 case vmIntrinsics::_getIntVolatile:
369 case vmIntrinsics::_getLongVolatile:
370 case vmIntrinsics::_getFloatVolatile:
371 case vmIntrinsics::_getDoubleVolatile:
372 case vmIntrinsics::_putReferenceVolatile:
373 case vmIntrinsics::_putBooleanVolatile:
374 case vmIntrinsics::_putByteVolatile:
375 case vmIntrinsics::_putShortVolatile:
376 case vmIntrinsics::_putCharVolatile:
377 case vmIntrinsics::_putIntVolatile:
378 case vmIntrinsics::_putLongVolatile:
379 case vmIntrinsics::_putFloatVolatile:
380 case vmIntrinsics::_putDoubleVolatile:
381 case vmIntrinsics::_getReferenceAcquire:
382 case vmIntrinsics::_getBooleanAcquire:
383 case vmIntrinsics::_getByteAcquire:
384 case vmIntrinsics::_getShortAcquire:
385 case vmIntrinsics::_getCharAcquire:
386 case vmIntrinsics::_getIntAcquire:
387 case vmIntrinsics::_getLongAcquire:
388 case vmIntrinsics::_getFloatAcquire:
389 case vmIntrinsics::_getDoubleAcquire:
390 case vmIntrinsics::_putReferenceRelease:
391 case vmIntrinsics::_putBooleanRelease:
392 case vmIntrinsics::_putByteRelease:
393 case vmIntrinsics::_putShortRelease:
394 case vmIntrinsics::_putCharRelease:
395 case vmIntrinsics::_putIntRelease:
396 case vmIntrinsics::_putLongRelease:
397 case vmIntrinsics::_putFloatRelease:
398 case vmIntrinsics::_putDoubleRelease:
399 case vmIntrinsics::_getReferenceOpaque:
400 case vmIntrinsics::_getBooleanOpaque:
401 case vmIntrinsics::_getByteOpaque:
402 case vmIntrinsics::_getShortOpaque:
403 case vmIntrinsics::_getCharOpaque:
404 case vmIntrinsics::_getIntOpaque:
405 case vmIntrinsics::_getLongOpaque:
406 case vmIntrinsics::_getFloatOpaque:
407 case vmIntrinsics::_getDoubleOpaque:
408 case vmIntrinsics::_putReferenceOpaque:
409 case vmIntrinsics::_putBooleanOpaque:
410 case vmIntrinsics::_putByteOpaque:
411 case vmIntrinsics::_putShortOpaque:
412 case vmIntrinsics::_putCharOpaque:
413 case vmIntrinsics::_putIntOpaque:
414 case vmIntrinsics::_putLongOpaque:
415 case vmIntrinsics::_putFloatOpaque:
416 case vmIntrinsics::_putDoubleOpaque:
417 case vmIntrinsics::_getAndAddInt:
418 case vmIntrinsics::_getAndAddLong:
419 case vmIntrinsics::_getAndSetInt:
420 case vmIntrinsics::_getAndSetLong:
421 case vmIntrinsics::_getAndSetReference:
422 case vmIntrinsics::_loadFence:
423 case vmIntrinsics::_storeFence:
424 case vmIntrinsics::_fullFence:
425 case vmIntrinsics::_compareAndSetLong:
426 case vmIntrinsics::_weakCompareAndSetLong:
427 case vmIntrinsics::_weakCompareAndSetLongPlain:
428 case vmIntrinsics::_weakCompareAndSetLongAcquire:
429 case vmIntrinsics::_weakCompareAndSetLongRelease:
430 case vmIntrinsics::_compareAndSetInt:
431 case vmIntrinsics::_weakCompareAndSetInt:
432 case vmIntrinsics::_weakCompareAndSetIntPlain:
433 case vmIntrinsics::_weakCompareAndSetIntAcquire:
434 case vmIntrinsics::_weakCompareAndSetIntRelease:
435 case vmIntrinsics::_compareAndSetReference:
436 case vmIntrinsics::_weakCompareAndSetReference:
437 case vmIntrinsics::_weakCompareAndSetReferencePlain:
438 case vmIntrinsics::_weakCompareAndSetReferenceAcquire:
439 case vmIntrinsics::_weakCompareAndSetReferenceRelease:
440 case vmIntrinsics::_compareAndExchangeInt:
441 case vmIntrinsics::_compareAndExchangeIntAcquire:
442 case vmIntrinsics::_compareAndExchangeIntRelease:
443 case vmIntrinsics::_compareAndExchangeLong:
444 case vmIntrinsics::_compareAndExchangeLongAcquire:
445 case vmIntrinsics::_compareAndExchangeLongRelease:
446 case vmIntrinsics::_compareAndExchangeReference:
447 case vmIntrinsics::_compareAndExchangeReferenceAcquire:
448 case vmIntrinsics::_compareAndExchangeReferenceRelease:
449 case vmIntrinsics::_allocateInstance:
450 if (!InlineUnsafeOps) return true;
451 break;
452 case vmIntrinsics::_getShortUnaligned:
453 case vmIntrinsics::_getCharUnaligned:
454 case vmIntrinsics::_getIntUnaligned:
455 case vmIntrinsics::_getLongUnaligned:
456 case vmIntrinsics::_putShortUnaligned:
457 case vmIntrinsics::_putCharUnaligned:
458 case vmIntrinsics::_putIntUnaligned:
459 case vmIntrinsics::_putLongUnaligned:
460 if (!InlineUnsafeOps || !UseUnalignedAccesses) return true;
461 break;
462 case vmIntrinsics::_hashCode:
463 if (!InlineObjectHash) return true;
464 break;
465 case vmIntrinsics::_aescrypt_encryptBlock:
466 case vmIntrinsics::_aescrypt_decryptBlock:
467 if (!UseAESIntrinsics) return true;
468 break;
469 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt:
470 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt:
471 if (!UseAESIntrinsics) return true;
472 break;
473 case vmIntrinsics::_electronicCodeBook_encryptAESCrypt:
474 case vmIntrinsics::_electronicCodeBook_decryptAESCrypt:
475 if (!UseAESIntrinsics) return true;
476 break;
477 case vmIntrinsics::_counterMode_AESCrypt:
478 if (!UseAESCTRIntrinsics) return true;
479 break;
480 case vmIntrinsics::_galoisCounterMode_AESCrypt:
481 if (!UseAESIntrinsics) return true;
482 break;
483 case vmIntrinsics::_md5_implCompress:
484 if (!UseMD5Intrinsics) return true;
485 break;
486 case vmIntrinsics::_sha_implCompress:
487 if (!UseSHA1Intrinsics) return true;
488 break;
489 case vmIntrinsics::_sha2_implCompress:
490 if (!UseSHA256Intrinsics) return true;
491 break;
492 case vmIntrinsics::_sha5_implCompress:
493 if (!UseSHA512Intrinsics) return true;
494 break;
495 case vmIntrinsics::_double_keccak:
496 case vmIntrinsics::_sha3_implCompress:
497 if (!UseSHA3Intrinsics) return true;
498 break;
499 case vmIntrinsics::_digestBase_implCompressMB:
500 if (!(UseMD5Intrinsics || UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics || UseSHA3Intrinsics)) return true;
501 break;
502 case vmIntrinsics::_ghash_processBlocks:
503 if (!UseGHASHIntrinsics) return true;
504 break;
505 case vmIntrinsics::_chacha20Block:
506 if (!UseChaCha20Intrinsics) return true;
507 break;
508 case vmIntrinsics::_kyberNtt:
509 case vmIntrinsics::_kyberInverseNtt:
510 case vmIntrinsics::_kyberNttMult:
511 case vmIntrinsics::_kyberAddPoly_2:
512 case vmIntrinsics::_kyberAddPoly_3:
513 case vmIntrinsics::_kyber12To16:
514 case vmIntrinsics::_kyberBarrettReduce:
515 if (!UseKyberIntrinsics) return true;
516 break;
517 case vmIntrinsics::_dilithiumAlmostNtt:
518 case vmIntrinsics::_dilithiumAlmostInverseNtt:
519 case vmIntrinsics::_dilithiumNttMult:
520 case vmIntrinsics::_dilithiumMontMulByConstant:
521 case vmIntrinsics::_dilithiumDecomposePoly:
522 if (!UseDilithiumIntrinsics) return true;
523 break;
524 case vmIntrinsics::_base64_encodeBlock:
525 case vmIntrinsics::_base64_decodeBlock:
526 if (!UseBASE64Intrinsics) return true;
527 break;
528 case vmIntrinsics::_poly1305_processBlocks:
529 if (!UsePoly1305Intrinsics) return true;
530 break;
531 case vmIntrinsics::_intpoly_montgomeryMult_P256:
532 case vmIntrinsics::_intpoly_assign:
533 if (!UseIntPolyIntrinsics) return true;
534 break;
535 case vmIntrinsics::_updateBytesCRC32C:
536 case vmIntrinsics::_updateDirectByteBufferCRC32C:
537 if (!UseCRC32CIntrinsics) return true;
538 break;
539 case vmIntrinsics::_vectorizedMismatch:
540 if (!UseVectorizedMismatchIntrinsic) return true;
541 break;
542 case vmIntrinsics::_updateBytesAdler32:
543 case vmIntrinsics::_updateByteBufferAdler32:
544 if (!UseAdler32Intrinsics) return true;
545 break;
546 case vmIntrinsics::_copyMemory:
547 if (!InlineArrayCopy || !InlineUnsafeOps) return true;
548 break;
549 case vmIntrinsics::_setMemory:
550 if (!InlineUnsafeOps) return true;
551 break;
552 #ifdef COMPILER2
553 case vmIntrinsics::_clone:
554 case vmIntrinsics::_copyOf:
555 case vmIntrinsics::_copyOfRange:
556 // These intrinsics use both the objectcopy and the arraycopy
557 // intrinsic mechanism.
558 if (!InlineObjectCopy || !InlineArrayCopy) return true;
559 break;
560 case vmIntrinsics::_compareToL:
561 case vmIntrinsics::_compareToU:
562 case vmIntrinsics::_compareToLU:
563 case vmIntrinsics::_compareToUL:
564 if (!SpecialStringCompareTo) return true;
565 break;
566 case vmIntrinsics::_indexOfL:
567 case vmIntrinsics::_indexOfU:
568 case vmIntrinsics::_indexOfUL:
569 case vmIntrinsics::_indexOfIL:
570 case vmIntrinsics::_indexOfIU:
571 case vmIntrinsics::_indexOfIUL:
572 case vmIntrinsics::_indexOfU_char:
573 case vmIntrinsics::_indexOfL_char:
574 if (!SpecialStringIndexOf) return true;
575 break;
576 case vmIntrinsics::_equalsL:
577 if (!SpecialStringEquals) return true;
578 break;
579 case vmIntrinsics::_vectorizedHashCode:
580 if (!UseVectorizedHashCodeIntrinsic) return true;
581 break;
582 case vmIntrinsics::_equalsB:
583 case vmIntrinsics::_equalsC:
584 if (!SpecialArraysEquals) return true;
585 break;
586 case vmIntrinsics::_encodeISOArray:
587 case vmIntrinsics::_encodeAsciiArray:
588 case vmIntrinsics::_encodeByteISOArray:
589 if (!SpecialEncodeISOArray) return true;
590 break;
591 case vmIntrinsics::_getCallerClass:
592 if (!InlineReflectionGetCallerClass) return true;
593 break;
594 case vmIntrinsics::_multiplyToLen:
595 if (!UseMultiplyToLenIntrinsic) return true;
596 break;
597 case vmIntrinsics::_squareToLen:
598 if (!UseSquareToLenIntrinsic) return true;
599 break;
600 case vmIntrinsics::_mulAdd:
601 if (!UseMulAddIntrinsic) return true;
602 break;
603 case vmIntrinsics::_montgomeryMultiply:
604 if (!UseMontgomeryMultiplyIntrinsic) return true;
605 break;
606 case vmIntrinsics::_montgomerySquare:
607 if (!UseMontgomerySquareIntrinsic) return true;
608 break;
609 case vmIntrinsics::_bigIntegerRightShiftWorker:
610 case vmIntrinsics::_bigIntegerLeftShiftWorker:
611 break;
612 case vmIntrinsics::_addExactI:
613 case vmIntrinsics::_addExactL:
614 case vmIntrinsics::_decrementExactI:
615 case vmIntrinsics::_decrementExactL:
616 case vmIntrinsics::_incrementExactI:
617 case vmIntrinsics::_incrementExactL:
618 case vmIntrinsics::_multiplyExactI:
619 case vmIntrinsics::_multiplyExactL:
620 case vmIntrinsics::_negateExactI:
621 case vmIntrinsics::_negateExactL:
622 case vmIntrinsics::_subtractExactI:
623 case vmIntrinsics::_subtractExactL:
624 if (!UseMathExactIntrinsics || !InlineMathNatives) return true;
625 break;
626 case vmIntrinsics::_isDigit:
627 case vmIntrinsics::_isLowerCase:
628 case vmIntrinsics::_isUpperCase:
629 case vmIntrinsics::_isWhitespace:
630 if (!UseCharacterCompareIntrinsics) return true;
631 break;
632 case vmIntrinsics::_dcopySign:
633 case vmIntrinsics::_fcopySign:
634 if (!InlineMathNatives || !UseCopySignIntrinsic) return true;
635 break;
636 case vmIntrinsics::_dsignum:
637 case vmIntrinsics::_fsignum:
638 if (!InlineMathNatives || !UseSignumIntrinsic) return true;
639 break;
640 #endif // COMPILER2
641 default:
642 return false;
643 }
644
645 return false;
646 }
647
648 #define VM_INTRINSIC_INITIALIZE(id, klass, name, sig, flags) #id "\0"
649 static const char* vm_intrinsic_name_bodies =
650 VM_INTRINSICS_DO(VM_INTRINSIC_INITIALIZE,
651 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
652
653 static const char* vm_intrinsic_name_table[vmIntrinsics::number_of_intrinsics()];
654 static TriBoolArray<(size_t)vmIntrinsics::number_of_intrinsics(), int> vm_intrinsic_control_words;
655
656 void vmIntrinsics::init_vm_intrinsic_name_table() {
657 const char** nt = &vm_intrinsic_name_table[0];
658 char* string = (char*) &vm_intrinsic_name_bodies[0];
659
660 for (auto index : EnumRange<vmIntrinsicID>{}) {
661 nt[as_int(index)] = string;
662 string += strlen(string); // skip string body
663 string += 1; // skip trailing null
664 }
665 assert(!strcmp(nt[as_int(vmIntrinsics::_hashCode)], "_hashCode"), "lined up");
666 nt[as_int(vmIntrinsics::_none)] = "_none";
667 }
668
669 const char* vmIntrinsics::name_at(vmIntrinsics::ID id) {
670 const char** nt = &vm_intrinsic_name_table[0];
671 if (nt[as_int(_none)] == nullptr) {
672 init_vm_intrinsic_name_table();
673 }
674
675 if (id < ID_LIMIT)
676 return vm_intrinsic_name_table[as_int(id)];
677 else
678 return "(unknown intrinsic)";
679 }
680
681 vmIntrinsics::ID vmIntrinsics::find_id(const char* name) {
682 const char** nt = &vm_intrinsic_name_table[0];
683 if (nt[as_int(_none)] == nullptr) {
684 init_vm_intrinsic_name_table();
685 }
686
687 for (auto index : EnumRange<vmIntrinsicID>{}) {
688 if (0 == strcmp(name, nt[as_int(index)])) {
689 return index;
690 }
691 }
692
693 return _none;
694 }
695
696 bool vmIntrinsics::is_intrinsic_available(vmIntrinsics::ID id) {
697 return VM_Version::is_intrinsic_supported(id) && !is_disabled_by_flags(id);
698 }
699
700 bool vmIntrinsics::is_disabled_by_flags(vmIntrinsics::ID id) {
701 assert(id > _none && id < ID_LIMIT, "must be a VM intrinsic");
702
703 // not initialized yet, process Control/DisableIntrinsic
704 if (vm_intrinsic_control_words[as_int(_none)].is_default()) {
705 for (ControlIntrinsicIter iter(ControlIntrinsic); *iter != nullptr; ++iter) {
706 vmIntrinsics::ID id = vmIntrinsics::find_id(*iter);
707
708 if (id != vmIntrinsics::_none) {
709 vm_intrinsic_control_words[as_int(id)] = iter.is_enabled() && !disabled_by_jvm_flags(id);
710 }
711 }
712
713 // Order matters, DisableIntrinsic can overwrite ControlIntrinsic
714 for (ControlIntrinsicIter iter(DisableIntrinsic, true/*disable_all*/); *iter != nullptr; ++iter) {
715 vmIntrinsics::ID id = vmIntrinsics::find_id(*iter);
716
717 if (id != vmIntrinsics::_none) {
718 vm_intrinsic_control_words[as_int(id)] = false;
719 }
720 }
721
722 vm_intrinsic_control_words[as_int(_none)] = true;
723 }
724
725 TriBool b = vm_intrinsic_control_words[as_int(id)];
726 if (b.is_default()) {
727 // unknown yet, query and cache it
728 b = vm_intrinsic_control_words[as_int(id)] = !disabled_by_jvm_flags(id);
729 }
730
731 return !b;
732 }
733
734 // These are for forming case labels:
735 #define ID3(x, y, z) (( jlong)(z) + \
736 ((jlong)(y) << vmSymbols::log2_SID_LIMIT) + \
737 ((jlong)(x) << (2*vmSymbols::log2_SID_LIMIT)) )
738 #define SID_ENUM(n) VM_SYMBOL_ENUM_NAME(n)
739
740 vmIntrinsics::ID vmIntrinsics::find_id_impl(vmSymbolID holder,
741 vmSymbolID name,
742 vmSymbolID sig,
743 u2 flags) {
744 assert((int)vmSymbolID::SID_LIMIT <= (1<<vmSymbols::log2_SID_LIMIT), "must fit");
745
746 // Let the C compiler build the decision tree.
747
748 #define VM_INTRINSIC_CASE(id, klass, name, sig, fcode) \
749 case ID3(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig)): \
750 if (!match_##fcode(flags)) break; \
751 return id;
752
753 switch (ID3(holder, name, sig)) {
754 VM_INTRINSICS_DO(VM_INTRINSIC_CASE,
755 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
756 }
757 return vmIntrinsics::_none;
758
759 #undef VM_INTRINSIC_CASE
760 }
761
762 class vmIntrinsicsLookup {
763 bool _class_map[vmSymbols::number_of_symbols()];
764
765 constexpr int as_index(vmSymbolID id) const {
766 int index = vmSymbols::as_int(id);
767 assert(0 <= index && index < int(sizeof(_class_map)), "must be");
768 return index;
769 }
770
771 constexpr void set_class_map(vmSymbolID id) {
772 _class_map[as_index(id)] = true;
773 }
774
775 public:
776 constexpr vmIntrinsicsLookup() : _class_map() {
777
778 #define VM_INTRINSIC_CLASS_MAP(id, klass, name, sig, fcode) \
779 set_class_map(SID_ENUM(klass));
780
781 VM_INTRINSICS_DO(VM_INTRINSIC_CLASS_MAP,
782 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE);
783 #undef VM_INTRINSIC_CLASS_MAP
784
785
786 // A few slightly irregular cases. See Method::init_intrinsic_id
787 set_class_map(SID_ENUM(java_lang_StrictMath));
788 set_class_map(SID_ENUM(java_lang_invoke_MethodHandle));
789 set_class_map(SID_ENUM(java_lang_invoke_VarHandle));
790 }
791
792 bool class_has_intrinsics(vmSymbolID holder) const {
793 return _class_map[as_index(holder)];
794 }
795 };
796
797 constexpr vmIntrinsicsLookup _intrinsics_lookup;
798
799 bool vmIntrinsics::class_has_intrinsics(vmSymbolID holder) {
800 return _intrinsics_lookup.class_has_intrinsics(holder);
801 }
802
803 const char* vmIntrinsics::short_name_as_C_string(vmIntrinsics::ID id, char* buf, int buflen) {
804 const char* str = name_at(id);
805 #ifndef PRODUCT
806 const char* kname = vmSymbols::name_for(class_for(id));
807 const char* mname = vmSymbols::name_for(name_for(id));
808 const char* sname = vmSymbols::name_for(signature_for(id));
809 const char* fname = "";
810 switch (flags_for(id)) {
811 case F_Y: fname = "synchronized "; break;
812 case F_RN: fname = "native "; break;
813 case F_SN: fname = "native static "; break;
814 case F_S: fname = "static "; break;
815 default: break;
816 }
817 const char* kptr = strrchr(kname, JVM_SIGNATURE_SLASH);
818 if (kptr != nullptr) kname = kptr + 1;
819 int len = jio_snprintf(buf, buflen, "%s: %s%s.%s%s",
820 str, fname, kname, mname, sname);
821 if (len < buflen)
822 str = buf;
823 #endif //PRODUCT
824 return str;
825 }
826
827
828 // These are to get information about intrinsics.
829
830 #define ID4(x, y, z, f) ((ID3(x, y, z) << vmIntrinsics::log2_FLAG_LIMIT) | (jlong) (f))
831
832 #ifndef PRODUCT
833 static const jlong intrinsic_info_array[vmIntrinsics::number_of_intrinsics()+1] = {
834 #define VM_INTRINSIC_INFO(ignore_id, klass, name, sig, fcode) \
835 ID4(SID_ENUM(klass), SID_ENUM(name), SID_ENUM(sig), vmIntrinsics::fcode),
836
837 0, VM_INTRINSICS_DO(VM_INTRINSIC_INFO,
838 VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_SYMBOL_IGNORE, VM_ALIAS_IGNORE)
839 0
840 #undef VM_INTRINSIC_INFO
841 };
842
843 inline jlong intrinsic_info(vmIntrinsics::ID id) {
844 return intrinsic_info_array[vmIntrinsics::as_int(id)];
845 }
846
847 vmSymbolID vmIntrinsics::class_for(vmIntrinsics::ID id) {
848 jlong info = intrinsic_info(id);
849 int shift = 2*vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
850 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1021, "");
851 return vmSymbols::as_SID( checked_cast<int>((info >> shift) & mask));
852 }
853
854 vmSymbolID vmIntrinsics::name_for(vmIntrinsics::ID id) {
855 jlong info = intrinsic_info(id);
856 int shift = vmSymbols::log2_SID_LIMIT + log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
857 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1022, "");
858 return vmSymbols::as_SID( checked_cast<int>((info >> shift) & mask));
859 }
860
861 vmSymbolID vmIntrinsics::signature_for(vmIntrinsics::ID id) {
862 jlong info = intrinsic_info(id);
863 int shift = log2_FLAG_LIMIT, mask = right_n_bits(vmSymbols::log2_SID_LIMIT);
864 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 1023, "");
865 return vmSymbols::as_SID( checked_cast<int>((info >> shift) & mask));
866 }
867
868 vmIntrinsics::Flags vmIntrinsics::flags_for(vmIntrinsics::ID id) {
869 jlong info = intrinsic_info(id);
870 int shift = 0, mask = right_n_bits(log2_FLAG_LIMIT);
871 assert(((ID4(1021,1022,1023,7) >> shift) & mask) == 7, "");
872 return Flags( (info >> shift) & mask );
873 }
874 #endif // !PRODUCT