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