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