Mercurial > hg > truffle
annotate src/cpu/x86/vm/macroAssembler_x86.cpp @ 12356:359f7e70ae7f
Reduce HotSpot diff and fix previous merge
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Fri, 11 Oct 2013 15:41:33 +0200 |
parents | cefad50507d8 |
children | 096c224171c4 |
rev | line source |
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7199 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
7199 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 * | |
23 */ | |
24 | |
25 #include "precompiled.hpp" | |
26 #include "asm/assembler.hpp" | |
27 #include "asm/assembler.inline.hpp" | |
28 #include "compiler/disassembler.hpp" | |
29 #include "gc_interface/collectedHeap.inline.hpp" | |
30 #include "interpreter/interpreter.hpp" | |
31 #include "memory/cardTableModRefBS.hpp" | |
32 #include "memory/resourceArea.hpp" | |
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33 #include "memory/universe.hpp" |
7199 | 34 #include "prims/methodHandles.hpp" |
35 #include "runtime/biasedLocking.hpp" | |
36 #include "runtime/interfaceSupport.hpp" | |
37 #include "runtime/objectMonitor.hpp" | |
38 #include "runtime/os.hpp" | |
39 #include "runtime/sharedRuntime.hpp" | |
40 #include "runtime/stubRoutines.hpp" | |
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41 #include "utilities/macros.hpp" |
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42 #if INCLUDE_ALL_GCS |
7199 | 43 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
44 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" | |
45 #include "gc_implementation/g1/heapRegion.hpp" | |
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46 #endif // INCLUDE_ALL_GCS |
7199 | 47 |
48 #ifdef PRODUCT | |
49 #define BLOCK_COMMENT(str) /* nothing */ | |
50 #define STOP(error) stop(error) | |
51 #else | |
52 #define BLOCK_COMMENT(str) block_comment(str) | |
53 #define STOP(error) block_comment(error); stop(error) | |
54 #endif | |
55 | |
56 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") | |
57 | |
58 | |
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59 #ifdef ASSERT |
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60 bool AbstractAssembler::pd_check_instruction_mark() { return true; } |
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61 #endif |
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62 |
7199 | 63 static Assembler::Condition reverse[] = { |
64 Assembler::noOverflow /* overflow = 0x0 */ , | |
65 Assembler::overflow /* noOverflow = 0x1 */ , | |
66 Assembler::aboveEqual /* carrySet = 0x2, below = 0x2 */ , | |
67 Assembler::below /* aboveEqual = 0x3, carryClear = 0x3 */ , | |
68 Assembler::notZero /* zero = 0x4, equal = 0x4 */ , | |
69 Assembler::zero /* notZero = 0x5, notEqual = 0x5 */ , | |
70 Assembler::above /* belowEqual = 0x6 */ , | |
71 Assembler::belowEqual /* above = 0x7 */ , | |
72 Assembler::positive /* negative = 0x8 */ , | |
73 Assembler::negative /* positive = 0x9 */ , | |
74 Assembler::noParity /* parity = 0xa */ , | |
75 Assembler::parity /* noParity = 0xb */ , | |
76 Assembler::greaterEqual /* less = 0xc */ , | |
77 Assembler::less /* greaterEqual = 0xd */ , | |
78 Assembler::greater /* lessEqual = 0xe */ , | |
79 Assembler::lessEqual /* greater = 0xf, */ | |
80 | |
81 }; | |
82 | |
83 | |
84 // Implementation of MacroAssembler | |
85 | |
86 // First all the versions that have distinct versions depending on 32/64 bit | |
87 // Unless the difference is trivial (1 line or so). | |
88 | |
89 #ifndef _LP64 | |
90 | |
91 // 32bit versions | |
92 | |
93 Address MacroAssembler::as_Address(AddressLiteral adr) { | |
94 return Address(adr.target(), adr.rspec()); | |
95 } | |
96 | |
97 Address MacroAssembler::as_Address(ArrayAddress adr) { | |
98 return Address::make_array(adr); | |
99 } | |
100 | |
101 int MacroAssembler::biased_locking_enter(Register lock_reg, | |
102 Register obj_reg, | |
103 Register swap_reg, | |
104 Register tmp_reg, | |
105 bool swap_reg_contains_mark, | |
106 Label& done, | |
107 Label* slow_case, | |
108 BiasedLockingCounters* counters) { | |
109 assert(UseBiasedLocking, "why call this otherwise?"); | |
110 assert(swap_reg == rax, "swap_reg must be rax, for cmpxchg"); | |
111 assert_different_registers(lock_reg, obj_reg, swap_reg); | |
112 | |
113 if (PrintBiasedLockingStatistics && counters == NULL) | |
114 counters = BiasedLocking::counters(); | |
115 | |
116 bool need_tmp_reg = false; | |
117 if (tmp_reg == noreg) { | |
118 need_tmp_reg = true; | |
119 tmp_reg = lock_reg; | |
120 } else { | |
121 assert_different_registers(lock_reg, obj_reg, swap_reg, tmp_reg); | |
122 } | |
123 assert(markOopDesc::age_shift == markOopDesc::lock_bits + markOopDesc::biased_lock_bits, "biased locking makes assumptions about bit layout"); | |
124 Address mark_addr (obj_reg, oopDesc::mark_offset_in_bytes()); | |
125 Address klass_addr (obj_reg, oopDesc::klass_offset_in_bytes()); | |
126 Address saved_mark_addr(lock_reg, 0); | |
127 | |
128 // Biased locking | |
129 // See whether the lock is currently biased toward our thread and | |
130 // whether the epoch is still valid | |
131 // Note that the runtime guarantees sufficient alignment of JavaThread | |
132 // pointers to allow age to be placed into low bits | |
133 // First check to see whether biasing is even enabled for this object | |
134 Label cas_label; | |
135 int null_check_offset = -1; | |
136 if (!swap_reg_contains_mark) { | |
137 null_check_offset = offset(); | |
138 movl(swap_reg, mark_addr); | |
139 } | |
140 if (need_tmp_reg) { | |
141 push(tmp_reg); | |
142 } | |
143 movl(tmp_reg, swap_reg); | |
144 andl(tmp_reg, markOopDesc::biased_lock_mask_in_place); | |
145 cmpl(tmp_reg, markOopDesc::biased_lock_pattern); | |
146 if (need_tmp_reg) { | |
147 pop(tmp_reg); | |
148 } | |
149 jcc(Assembler::notEqual, cas_label); | |
150 // The bias pattern is present in the object's header. Need to check | |
151 // whether the bias owner and the epoch are both still current. | |
152 // Note that because there is no current thread register on x86 we | |
153 // need to store off the mark word we read out of the object to | |
154 // avoid reloading it and needing to recheck invariants below. This | |
155 // store is unfortunate but it makes the overall code shorter and | |
156 // simpler. | |
157 movl(saved_mark_addr, swap_reg); | |
158 if (need_tmp_reg) { | |
159 push(tmp_reg); | |
160 } | |
161 get_thread(tmp_reg); | |
162 xorl(swap_reg, tmp_reg); | |
163 if (swap_reg_contains_mark) { | |
164 null_check_offset = offset(); | |
165 } | |
166 movl(tmp_reg, klass_addr); | |
167 xorl(swap_reg, Address(tmp_reg, Klass::prototype_header_offset())); | |
168 andl(swap_reg, ~((int) markOopDesc::age_mask_in_place)); | |
169 if (need_tmp_reg) { | |
170 pop(tmp_reg); | |
171 } | |
172 if (counters != NULL) { | |
173 cond_inc32(Assembler::zero, | |
174 ExternalAddress((address)counters->biased_lock_entry_count_addr())); | |
175 } | |
176 jcc(Assembler::equal, done); | |
177 | |
178 Label try_revoke_bias; | |
179 Label try_rebias; | |
180 | |
181 // At this point we know that the header has the bias pattern and | |
182 // that we are not the bias owner in the current epoch. We need to | |
183 // figure out more details about the state of the header in order to | |
184 // know what operations can be legally performed on the object's | |
185 // header. | |
186 | |
187 // If the low three bits in the xor result aren't clear, that means | |
188 // the prototype header is no longer biased and we have to revoke | |
189 // the bias on this object. | |
190 testl(swap_reg, markOopDesc::biased_lock_mask_in_place); | |
191 jcc(Assembler::notZero, try_revoke_bias); | |
192 | |
193 // Biasing is still enabled for this data type. See whether the | |
194 // epoch of the current bias is still valid, meaning that the epoch | |
195 // bits of the mark word are equal to the epoch bits of the | |
196 // prototype header. (Note that the prototype header's epoch bits | |
197 // only change at a safepoint.) If not, attempt to rebias the object | |
198 // toward the current thread. Note that we must be absolutely sure | |
199 // that the current epoch is invalid in order to do this because | |
200 // otherwise the manipulations it performs on the mark word are | |
201 // illegal. | |
202 testl(swap_reg, markOopDesc::epoch_mask_in_place); | |
203 jcc(Assembler::notZero, try_rebias); | |
204 | |
205 // The epoch of the current bias is still valid but we know nothing | |
206 // about the owner; it might be set or it might be clear. Try to | |
207 // acquire the bias of the object using an atomic operation. If this | |
208 // fails we will go in to the runtime to revoke the object's bias. | |
209 // Note that we first construct the presumed unbiased header so we | |
210 // don't accidentally blow away another thread's valid bias. | |
211 movl(swap_reg, saved_mark_addr); | |
212 andl(swap_reg, | |
213 markOopDesc::biased_lock_mask_in_place | markOopDesc::age_mask_in_place | markOopDesc::epoch_mask_in_place); | |
214 if (need_tmp_reg) { | |
215 push(tmp_reg); | |
216 } | |
217 get_thread(tmp_reg); | |
218 orl(tmp_reg, swap_reg); | |
219 if (os::is_MP()) { | |
220 lock(); | |
221 } | |
222 cmpxchgptr(tmp_reg, Address(obj_reg, 0)); | |
223 if (need_tmp_reg) { | |
224 pop(tmp_reg); | |
225 } | |
226 // If the biasing toward our thread failed, this means that | |
227 // another thread succeeded in biasing it toward itself and we | |
228 // need to revoke that bias. The revocation will occur in the | |
229 // interpreter runtime in the slow case. | |
230 if (counters != NULL) { | |
231 cond_inc32(Assembler::zero, | |
232 ExternalAddress((address)counters->anonymously_biased_lock_entry_count_addr())); | |
233 } | |
234 if (slow_case != NULL) { | |
235 jcc(Assembler::notZero, *slow_case); | |
236 } | |
237 jmp(done); | |
238 | |
239 bind(try_rebias); | |
240 // At this point we know the epoch has expired, meaning that the | |
241 // current "bias owner", if any, is actually invalid. Under these | |
242 // circumstances _only_, we are allowed to use the current header's | |
243 // value as the comparison value when doing the cas to acquire the | |
244 // bias in the current epoch. In other words, we allow transfer of | |
245 // the bias from one thread to another directly in this situation. | |
246 // | |
247 // FIXME: due to a lack of registers we currently blow away the age | |
248 // bits in this situation. Should attempt to preserve them. | |
249 if (need_tmp_reg) { | |
250 push(tmp_reg); | |
251 } | |
252 get_thread(tmp_reg); | |
253 movl(swap_reg, klass_addr); | |
254 orl(tmp_reg, Address(swap_reg, Klass::prototype_header_offset())); | |
255 movl(swap_reg, saved_mark_addr); | |
256 if (os::is_MP()) { | |
257 lock(); | |
258 } | |
259 cmpxchgptr(tmp_reg, Address(obj_reg, 0)); | |
260 if (need_tmp_reg) { | |
261 pop(tmp_reg); | |
262 } | |
263 // If the biasing toward our thread failed, then another thread | |
264 // succeeded in biasing it toward itself and we need to revoke that | |
265 // bias. The revocation will occur in the runtime in the slow case. | |
266 if (counters != NULL) { | |
267 cond_inc32(Assembler::zero, | |
268 ExternalAddress((address)counters->rebiased_lock_entry_count_addr())); | |
269 } | |
270 if (slow_case != NULL) { | |
271 jcc(Assembler::notZero, *slow_case); | |
272 } | |
273 jmp(done); | |
274 | |
275 bind(try_revoke_bias); | |
276 // The prototype mark in the klass doesn't have the bias bit set any | |
277 // more, indicating that objects of this data type are not supposed | |
278 // to be biased any more. We are going to try to reset the mark of | |
279 // this object to the prototype value and fall through to the | |
280 // CAS-based locking scheme. Note that if our CAS fails, it means | |
281 // that another thread raced us for the privilege of revoking the | |
282 // bias of this particular object, so it's okay to continue in the | |
283 // normal locking code. | |
284 // | |
285 // FIXME: due to a lack of registers we currently blow away the age | |
286 // bits in this situation. Should attempt to preserve them. | |
287 movl(swap_reg, saved_mark_addr); | |
288 if (need_tmp_reg) { | |
289 push(tmp_reg); | |
290 } | |
291 movl(tmp_reg, klass_addr); | |
292 movl(tmp_reg, Address(tmp_reg, Klass::prototype_header_offset())); | |
293 if (os::is_MP()) { | |
294 lock(); | |
295 } | |
296 cmpxchgptr(tmp_reg, Address(obj_reg, 0)); | |
297 if (need_tmp_reg) { | |
298 pop(tmp_reg); | |
299 } | |
300 // Fall through to the normal CAS-based lock, because no matter what | |
301 // the result of the above CAS, some thread must have succeeded in | |
302 // removing the bias bit from the object's header. | |
303 if (counters != NULL) { | |
304 cond_inc32(Assembler::zero, | |
305 ExternalAddress((address)counters->revoked_lock_entry_count_addr())); | |
306 } | |
307 | |
308 bind(cas_label); | |
309 | |
310 return null_check_offset; | |
311 } | |
312 void MacroAssembler::call_VM_leaf_base(address entry_point, | |
313 int number_of_arguments) { | |
314 call(RuntimeAddress(entry_point)); | |
315 increment(rsp, number_of_arguments * wordSize); | |
316 } | |
317 | |
318 void MacroAssembler::cmpklass(Address src1, Metadata* obj) { | |
319 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate()); | |
320 } | |
321 | |
322 void MacroAssembler::cmpklass(Register src1, Metadata* obj) { | |
323 cmp_literal32(src1, (int32_t)obj, metadata_Relocation::spec_for_immediate()); | |
324 } | |
325 | |
326 void MacroAssembler::cmpoop(Address src1, jobject obj) { | |
327 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate()); | |
328 } | |
329 | |
330 void MacroAssembler::cmpoop(Register src1, jobject obj) { | |
331 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate()); | |
332 } | |
333 | |
334 void MacroAssembler::extend_sign(Register hi, Register lo) { | |
335 // According to Intel Doc. AP-526, "Integer Divide", p.18. | |
336 if (VM_Version::is_P6() && hi == rdx && lo == rax) { | |
337 cdql(); | |
338 } else { | |
339 movl(hi, lo); | |
340 sarl(hi, 31); | |
341 } | |
342 } | |
343 | |
344 void MacroAssembler::jC2(Register tmp, Label& L) { | |
345 // set parity bit if FPU flag C2 is set (via rax) | |
346 save_rax(tmp); | |
347 fwait(); fnstsw_ax(); | |
348 sahf(); | |
349 restore_rax(tmp); | |
350 // branch | |
351 jcc(Assembler::parity, L); | |
352 } | |
353 | |
354 void MacroAssembler::jnC2(Register tmp, Label& L) { | |
355 // set parity bit if FPU flag C2 is set (via rax) | |
356 save_rax(tmp); | |
357 fwait(); fnstsw_ax(); | |
358 sahf(); | |
359 restore_rax(tmp); | |
360 // branch | |
361 jcc(Assembler::noParity, L); | |
362 } | |
363 | |
364 // 32bit can do a case table jump in one instruction but we no longer allow the base | |
365 // to be installed in the Address class | |
366 void MacroAssembler::jump(ArrayAddress entry) { | |
367 jmp(as_Address(entry)); | |
368 } | |
369 | |
370 // Note: y_lo will be destroyed | |
371 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) { | |
372 // Long compare for Java (semantics as described in JVM spec.) | |
373 Label high, low, done; | |
374 | |
375 cmpl(x_hi, y_hi); | |
376 jcc(Assembler::less, low); | |
377 jcc(Assembler::greater, high); | |
378 // x_hi is the return register | |
379 xorl(x_hi, x_hi); | |
380 cmpl(x_lo, y_lo); | |
381 jcc(Assembler::below, low); | |
382 jcc(Assembler::equal, done); | |
383 | |
384 bind(high); | |
385 xorl(x_hi, x_hi); | |
386 increment(x_hi); | |
387 jmp(done); | |
388 | |
389 bind(low); | |
390 xorl(x_hi, x_hi); | |
391 decrementl(x_hi); | |
392 | |
393 bind(done); | |
394 } | |
395 | |
396 void MacroAssembler::lea(Register dst, AddressLiteral src) { | |
397 mov_literal32(dst, (int32_t)src.target(), src.rspec()); | |
398 } | |
399 | |
400 void MacroAssembler::lea(Address dst, AddressLiteral adr) { | |
401 // leal(dst, as_Address(adr)); | |
402 // see note in movl as to why we must use a move | |
403 mov_literal32(dst, (int32_t) adr.target(), adr.rspec()); | |
404 } | |
405 | |
406 void MacroAssembler::leave() { | |
407 mov(rsp, rbp); | |
408 pop(rbp); | |
409 } | |
410 | |
411 void MacroAssembler::lmul(int x_rsp_offset, int y_rsp_offset) { | |
412 // Multiplication of two Java long values stored on the stack | |
413 // as illustrated below. Result is in rdx:rax. | |
414 // | |
415 // rsp ---> [ ?? ] \ \ | |
416 // .... | y_rsp_offset | | |
417 // [ y_lo ] / (in bytes) | x_rsp_offset | |
418 // [ y_hi ] | (in bytes) | |
419 // .... | | |
420 // [ x_lo ] / | |
421 // [ x_hi ] | |
422 // .... | |
423 // | |
424 // Basic idea: lo(result) = lo(x_lo * y_lo) | |
425 // hi(result) = hi(x_lo * y_lo) + lo(x_hi * y_lo) + lo(x_lo * y_hi) | |
426 Address x_hi(rsp, x_rsp_offset + wordSize); Address x_lo(rsp, x_rsp_offset); | |
427 Address y_hi(rsp, y_rsp_offset + wordSize); Address y_lo(rsp, y_rsp_offset); | |
428 Label quick; | |
429 // load x_hi, y_hi and check if quick | |
430 // multiplication is possible | |
431 movl(rbx, x_hi); | |
432 movl(rcx, y_hi); | |
433 movl(rax, rbx); | |
434 orl(rbx, rcx); // rbx, = 0 <=> x_hi = 0 and y_hi = 0 | |
435 jcc(Assembler::zero, quick); // if rbx, = 0 do quick multiply | |
436 // do full multiplication | |
437 // 1st step | |
438 mull(y_lo); // x_hi * y_lo | |
439 movl(rbx, rax); // save lo(x_hi * y_lo) in rbx, | |
440 // 2nd step | |
441 movl(rax, x_lo); | |
442 mull(rcx); // x_lo * y_hi | |
443 addl(rbx, rax); // add lo(x_lo * y_hi) to rbx, | |
444 // 3rd step | |
445 bind(quick); // note: rbx, = 0 if quick multiply! | |
446 movl(rax, x_lo); | |
447 mull(y_lo); // x_lo * y_lo | |
448 addl(rdx, rbx); // correct hi(x_lo * y_lo) | |
449 } | |
450 | |
451 void MacroAssembler::lneg(Register hi, Register lo) { | |
452 negl(lo); | |
453 adcl(hi, 0); | |
454 negl(hi); | |
455 } | |
456 | |
457 void MacroAssembler::lshl(Register hi, Register lo) { | |
458 // Java shift left long support (semantics as described in JVM spec., p.305) | |
459 // (basic idea for shift counts s >= n: x << s == (x << n) << (s - n)) | |
460 // shift value is in rcx ! | |
461 assert(hi != rcx, "must not use rcx"); | |
462 assert(lo != rcx, "must not use rcx"); | |
463 const Register s = rcx; // shift count | |
464 const int n = BitsPerWord; | |
465 Label L; | |
466 andl(s, 0x3f); // s := s & 0x3f (s < 0x40) | |
467 cmpl(s, n); // if (s < n) | |
468 jcc(Assembler::less, L); // else (s >= n) | |
469 movl(hi, lo); // x := x << n | |
470 xorl(lo, lo); | |
471 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n! | |
472 bind(L); // s (mod n) < n | |
473 shldl(hi, lo); // x := x << s | |
474 shll(lo); | |
475 } | |
476 | |
477 | |
478 void MacroAssembler::lshr(Register hi, Register lo, bool sign_extension) { | |
479 // Java shift right long support (semantics as described in JVM spec., p.306 & p.310) | |
480 // (basic idea for shift counts s >= n: x >> s == (x >> n) >> (s - n)) | |
481 assert(hi != rcx, "must not use rcx"); | |
482 assert(lo != rcx, "must not use rcx"); | |
483 const Register s = rcx; // shift count | |
484 const int n = BitsPerWord; | |
485 Label L; | |
486 andl(s, 0x3f); // s := s & 0x3f (s < 0x40) | |
487 cmpl(s, n); // if (s < n) | |
488 jcc(Assembler::less, L); // else (s >= n) | |
489 movl(lo, hi); // x := x >> n | |
490 if (sign_extension) sarl(hi, 31); | |
491 else xorl(hi, hi); | |
492 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n! | |
493 bind(L); // s (mod n) < n | |
494 shrdl(lo, hi); // x := x >> s | |
495 if (sign_extension) sarl(hi); | |
496 else shrl(hi); | |
497 } | |
498 | |
499 void MacroAssembler::movoop(Register dst, jobject obj) { | |
500 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate()); | |
501 } | |
502 | |
503 void MacroAssembler::movoop(Address dst, jobject obj) { | |
504 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate()); | |
505 } | |
506 | |
507 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) { | |
508 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate()); | |
509 } | |
510 | |
511 void MacroAssembler::mov_metadata(Address dst, Metadata* obj) { | |
512 mov_literal32(dst, (int32_t)obj, metadata_Relocation::spec_for_immediate()); | |
513 } | |
514 | |
515 void MacroAssembler::movptr(Register dst, AddressLiteral src) { | |
516 if (src.is_lval()) { | |
517 mov_literal32(dst, (intptr_t)src.target(), src.rspec()); | |
518 } else { | |
519 movl(dst, as_Address(src)); | |
520 } | |
521 } | |
522 | |
523 void MacroAssembler::movptr(ArrayAddress dst, Register src) { | |
524 movl(as_Address(dst), src); | |
525 } | |
526 | |
527 void MacroAssembler::movptr(Register dst, ArrayAddress src) { | |
528 movl(dst, as_Address(src)); | |
529 } | |
530 | |
531 // src should NEVER be a real pointer. Use AddressLiteral for true pointers | |
532 void MacroAssembler::movptr(Address dst, intptr_t src) { | |
533 movl(dst, src); | |
534 } | |
535 | |
536 | |
537 void MacroAssembler::pop_callee_saved_registers() { | |
538 pop(rcx); | |
539 pop(rdx); | |
540 pop(rdi); | |
541 pop(rsi); | |
542 } | |
543 | |
544 void MacroAssembler::pop_fTOS() { | |
545 fld_d(Address(rsp, 0)); | |
546 addl(rsp, 2 * wordSize); | |
547 } | |
548 | |
549 void MacroAssembler::push_callee_saved_registers() { | |
550 push(rsi); | |
551 push(rdi); | |
552 push(rdx); | |
553 push(rcx); | |
554 } | |
555 | |
556 void MacroAssembler::push_fTOS() { | |
557 subl(rsp, 2 * wordSize); | |
558 fstp_d(Address(rsp, 0)); | |
559 } | |
560 | |
561 | |
562 void MacroAssembler::pushoop(jobject obj) { | |
563 push_literal32((int32_t)obj, oop_Relocation::spec_for_immediate()); | |
564 } | |
565 | |
566 void MacroAssembler::pushklass(Metadata* obj) { | |
567 push_literal32((int32_t)obj, metadata_Relocation::spec_for_immediate()); | |
568 } | |
569 | |
570 void MacroAssembler::pushptr(AddressLiteral src) { | |
571 if (src.is_lval()) { | |
572 push_literal32((int32_t)src.target(), src.rspec()); | |
573 } else { | |
574 pushl(as_Address(src)); | |
575 } | |
576 } | |
577 | |
578 void MacroAssembler::set_word_if_not_zero(Register dst) { | |
579 xorl(dst, dst); | |
580 set_byte_if_not_zero(dst); | |
581 } | |
582 | |
583 static void pass_arg0(MacroAssembler* masm, Register arg) { | |
584 masm->push(arg); | |
585 } | |
586 | |
587 static void pass_arg1(MacroAssembler* masm, Register arg) { | |
588 masm->push(arg); | |
589 } | |
590 | |
591 static void pass_arg2(MacroAssembler* masm, Register arg) { | |
592 masm->push(arg); | |
593 } | |
594 | |
595 static void pass_arg3(MacroAssembler* masm, Register arg) { | |
596 masm->push(arg); | |
597 } | |
598 | |
599 #ifndef PRODUCT | |
600 extern "C" void findpc(intptr_t x); | |
601 #endif | |
602 | |
603 void MacroAssembler::debug32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip, char* msg) { | |
604 // In order to get locks to work, we need to fake a in_VM state | |
605 JavaThread* thread = JavaThread::current(); | |
606 JavaThreadState saved_state = thread->thread_state(); | |
607 thread->set_thread_state(_thread_in_vm); | |
608 if (ShowMessageBoxOnError) { | |
609 JavaThread* thread = JavaThread::current(); | |
610 JavaThreadState saved_state = thread->thread_state(); | |
611 thread->set_thread_state(_thread_in_vm); | |
612 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { | |
613 ttyLocker ttyl; | |
614 BytecodeCounter::print(); | |
615 } | |
616 // To see where a verify_oop failed, get $ebx+40/X for this frame. | |
617 // This is the value of eip which points to where verify_oop will return. | |
618 if (os::message_box(msg, "Execution stopped, print registers?")) { | |
619 print_state32(rdi, rsi, rbp, rsp, rbx, rdx, rcx, rax, eip); | |
620 BREAKPOINT; | |
621 } | |
622 } else { | |
623 ttyLocker ttyl; | |
624 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", msg); | |
625 } | |
626 // Don't assert holding the ttyLock | |
627 assert(false, err_msg("DEBUG MESSAGE: %s", msg)); | |
628 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state); | |
629 } | |
630 | |
631 void MacroAssembler::print_state32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip) { | |
632 ttyLocker ttyl; | |
633 FlagSetting fs(Debugging, true); | |
634 tty->print_cr("eip = 0x%08x", eip); | |
635 #ifndef PRODUCT | |
636 if ((WizardMode || Verbose) && PrintMiscellaneous) { | |
637 tty->cr(); | |
638 findpc(eip); | |
639 tty->cr(); | |
640 } | |
641 #endif | |
642 #define PRINT_REG(rax) \ | |
643 { tty->print("%s = ", #rax); os::print_location(tty, rax); } | |
644 PRINT_REG(rax); | |
645 PRINT_REG(rbx); | |
646 PRINT_REG(rcx); | |
647 PRINT_REG(rdx); | |
648 PRINT_REG(rdi); | |
649 PRINT_REG(rsi); | |
650 PRINT_REG(rbp); | |
651 PRINT_REG(rsp); | |
652 #undef PRINT_REG | |
653 // Print some words near top of staack. | |
654 int* dump_sp = (int*) rsp; | |
655 for (int col1 = 0; col1 < 8; col1++) { | |
656 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp); | |
657 os::print_location(tty, *dump_sp++); | |
658 } | |
659 for (int row = 0; row < 16; row++) { | |
660 tty->print("(rsp+0x%03x) 0x%08x: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (intptr_t)dump_sp); | |
661 for (int col = 0; col < 8; col++) { | |
662 tty->print(" 0x%08x", *dump_sp++); | |
663 } | |
664 tty->cr(); | |
665 } | |
666 // Print some instructions around pc: | |
667 Disassembler::decode((address)eip-64, (address)eip); | |
668 tty->print_cr("--------"); | |
669 Disassembler::decode((address)eip, (address)eip+32); | |
670 } | |
671 | |
672 void MacroAssembler::stop(const char* msg) { | |
673 ExternalAddress message((address)msg); | |
674 // push address of message | |
675 pushptr(message.addr()); | |
676 { Label L; call(L, relocInfo::none); bind(L); } // push eip | |
677 pusha(); // push registers | |
678 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug32))); | |
679 hlt(); | |
680 } | |
681 | |
682 void MacroAssembler::warn(const char* msg) { | |
683 push_CPU_state(); | |
684 | |
685 ExternalAddress message((address) msg); | |
686 // push address of message | |
687 pushptr(message.addr()); | |
688 | |
689 call(RuntimeAddress(CAST_FROM_FN_PTR(address, warning))); | |
690 addl(rsp, wordSize); // discard argument | |
691 pop_CPU_state(); | |
692 } | |
693 | |
694 void MacroAssembler::print_state() { | |
695 { Label L; call(L, relocInfo::none); bind(L); } // push eip | |
696 pusha(); // push registers | |
697 | |
698 push_CPU_state(); | |
699 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::print_state32))); | |
700 pop_CPU_state(); | |
701 | |
702 popa(); | |
703 addl(rsp, wordSize); | |
704 } | |
705 | |
706 #else // _LP64 | |
707 | |
708 // 64 bit versions | |
709 | |
710 Address MacroAssembler::as_Address(AddressLiteral adr) { | |
711 // amd64 always does this as a pc-rel | |
712 // we can be absolute or disp based on the instruction type | |
713 // jmp/call are displacements others are absolute | |
714 assert(!adr.is_lval(), "must be rval"); | |
715 assert(reachable(adr), "must be"); | |
716 return Address((int32_t)(intptr_t)(adr.target() - pc()), adr.target(), adr.reloc()); | |
717 | |
718 } | |
719 | |
720 Address MacroAssembler::as_Address(ArrayAddress adr) { | |
721 AddressLiteral base = adr.base(); | |
722 lea(rscratch1, base); | |
723 Address index = adr.index(); | |
724 assert(index._disp == 0, "must not have disp"); // maybe it can? | |
725 Address array(rscratch1, index._index, index._scale, index._disp); | |
726 return array; | |
727 } | |
728 | |
729 int MacroAssembler::biased_locking_enter(Register lock_reg, | |
730 Register obj_reg, | |
731 Register swap_reg, | |
732 Register tmp_reg, | |
733 bool swap_reg_contains_mark, | |
734 Label& done, | |
735 Label* slow_case, | |
736 BiasedLockingCounters* counters) { | |
737 assert(UseBiasedLocking, "why call this otherwise?"); | |
738 assert(swap_reg == rax, "swap_reg must be rax for cmpxchgq"); | |
739 assert(tmp_reg != noreg, "tmp_reg must be supplied"); | |
740 assert_different_registers(lock_reg, obj_reg, swap_reg, tmp_reg); | |
741 assert(markOopDesc::age_shift == markOopDesc::lock_bits + markOopDesc::biased_lock_bits, "biased locking makes assumptions about bit layout"); | |
742 Address mark_addr (obj_reg, oopDesc::mark_offset_in_bytes()); | |
743 Address saved_mark_addr(lock_reg, 0); | |
744 | |
745 if (PrintBiasedLockingStatistics && counters == NULL) | |
746 counters = BiasedLocking::counters(); | |
747 | |
748 // Biased locking | |
749 // See whether the lock is currently biased toward our thread and | |
750 // whether the epoch is still valid | |
751 // Note that the runtime guarantees sufficient alignment of JavaThread | |
752 // pointers to allow age to be placed into low bits | |
753 // First check to see whether biasing is even enabled for this object | |
754 Label cas_label; | |
755 int null_check_offset = -1; | |
756 if (!swap_reg_contains_mark) { | |
757 null_check_offset = offset(); | |
758 movq(swap_reg, mark_addr); | |
759 } | |
760 movq(tmp_reg, swap_reg); | |
761 andq(tmp_reg, markOopDesc::biased_lock_mask_in_place); | |
762 cmpq(tmp_reg, markOopDesc::biased_lock_pattern); | |
763 jcc(Assembler::notEqual, cas_label); | |
764 // The bias pattern is present in the object's header. Need to check | |
765 // whether the bias owner and the epoch are both still current. | |
766 load_prototype_header(tmp_reg, obj_reg); | |
767 orq(tmp_reg, r15_thread); | |
768 xorq(tmp_reg, swap_reg); | |
769 andq(tmp_reg, ~((int) markOopDesc::age_mask_in_place)); | |
770 if (counters != NULL) { | |
771 cond_inc32(Assembler::zero, | |
772 ExternalAddress((address) counters->anonymously_biased_lock_entry_count_addr())); | |
773 } | |
774 jcc(Assembler::equal, done); | |
775 | |
776 Label try_revoke_bias; | |
777 Label try_rebias; | |
778 | |
779 // At this point we know that the header has the bias pattern and | |
780 // that we are not the bias owner in the current epoch. We need to | |
781 // figure out more details about the state of the header in order to | |
782 // know what operations can be legally performed on the object's | |
783 // header. | |
784 | |
785 // If the low three bits in the xor result aren't clear, that means | |
786 // the prototype header is no longer biased and we have to revoke | |
787 // the bias on this object. | |
788 testq(tmp_reg, markOopDesc::biased_lock_mask_in_place); | |
789 jcc(Assembler::notZero, try_revoke_bias); | |
790 | |
791 // Biasing is still enabled for this data type. See whether the | |
792 // epoch of the current bias is still valid, meaning that the epoch | |
793 // bits of the mark word are equal to the epoch bits of the | |
794 // prototype header. (Note that the prototype header's epoch bits | |
795 // only change at a safepoint.) If not, attempt to rebias the object | |
796 // toward the current thread. Note that we must be absolutely sure | |
797 // that the current epoch is invalid in order to do this because | |
798 // otherwise the manipulations it performs on the mark word are | |
799 // illegal. | |
800 testq(tmp_reg, markOopDesc::epoch_mask_in_place); | |
801 jcc(Assembler::notZero, try_rebias); | |
802 | |
803 // The epoch of the current bias is still valid but we know nothing | |
804 // about the owner; it might be set or it might be clear. Try to | |
805 // acquire the bias of the object using an atomic operation. If this | |
806 // fails we will go in to the runtime to revoke the object's bias. | |
807 // Note that we first construct the presumed unbiased header so we | |
808 // don't accidentally blow away another thread's valid bias. | |
809 andq(swap_reg, | |
810 markOopDesc::biased_lock_mask_in_place | markOopDesc::age_mask_in_place | markOopDesc::epoch_mask_in_place); | |
811 movq(tmp_reg, swap_reg); | |
812 orq(tmp_reg, r15_thread); | |
813 if (os::is_MP()) { | |
814 lock(); | |
815 } | |
816 cmpxchgq(tmp_reg, Address(obj_reg, 0)); | |
817 // If the biasing toward our thread failed, this means that | |
818 // another thread succeeded in biasing it toward itself and we | |
819 // need to revoke that bias. The revocation will occur in the | |
820 // interpreter runtime in the slow case. | |
821 if (counters != NULL) { | |
822 cond_inc32(Assembler::zero, | |
823 ExternalAddress((address) counters->anonymously_biased_lock_entry_count_addr())); | |
824 } | |
825 if (slow_case != NULL) { | |
826 jcc(Assembler::notZero, *slow_case); | |
827 } | |
828 jmp(done); | |
829 | |
830 bind(try_rebias); | |
831 // At this point we know the epoch has expired, meaning that the | |
832 // current "bias owner", if any, is actually invalid. Under these | |
833 // circumstances _only_, we are allowed to use the current header's | |
834 // value as the comparison value when doing the cas to acquire the | |
835 // bias in the current epoch. In other words, we allow transfer of | |
836 // the bias from one thread to another directly in this situation. | |
837 // | |
838 // FIXME: due to a lack of registers we currently blow away the age | |
839 // bits in this situation. Should attempt to preserve them. | |
840 load_prototype_header(tmp_reg, obj_reg); | |
841 orq(tmp_reg, r15_thread); | |
842 if (os::is_MP()) { | |
843 lock(); | |
844 } | |
845 cmpxchgq(tmp_reg, Address(obj_reg, 0)); | |
846 // If the biasing toward our thread failed, then another thread | |
847 // succeeded in biasing it toward itself and we need to revoke that | |
848 // bias. The revocation will occur in the runtime in the slow case. | |
849 if (counters != NULL) { | |
850 cond_inc32(Assembler::zero, | |
851 ExternalAddress((address) counters->rebiased_lock_entry_count_addr())); | |
852 } | |
853 if (slow_case != NULL) { | |
854 jcc(Assembler::notZero, *slow_case); | |
855 } | |
856 jmp(done); | |
857 | |
858 bind(try_revoke_bias); | |
859 // The prototype mark in the klass doesn't have the bias bit set any | |
860 // more, indicating that objects of this data type are not supposed | |
861 // to be biased any more. We are going to try to reset the mark of | |
862 // this object to the prototype value and fall through to the | |
863 // CAS-based locking scheme. Note that if our CAS fails, it means | |
864 // that another thread raced us for the privilege of revoking the | |
865 // bias of this particular object, so it's okay to continue in the | |
866 // normal locking code. | |
867 // | |
868 // FIXME: due to a lack of registers we currently blow away the age | |
869 // bits in this situation. Should attempt to preserve them. | |
870 load_prototype_header(tmp_reg, obj_reg); | |
871 if (os::is_MP()) { | |
872 lock(); | |
873 } | |
874 cmpxchgq(tmp_reg, Address(obj_reg, 0)); | |
875 // Fall through to the normal CAS-based lock, because no matter what | |
876 // the result of the above CAS, some thread must have succeeded in | |
877 // removing the bias bit from the object's header. | |
878 if (counters != NULL) { | |
879 cond_inc32(Assembler::zero, | |
880 ExternalAddress((address) counters->revoked_lock_entry_count_addr())); | |
881 } | |
882 | |
883 bind(cas_label); | |
884 | |
885 return null_check_offset; | |
886 } | |
887 | |
888 void MacroAssembler::call_VM_leaf_base(address entry_point, int num_args) { | |
889 Label L, E; | |
890 | |
891 #ifdef _WIN64 | |
892 // Windows always allocates space for it's register args | |
893 assert(num_args <= 4, "only register arguments supported"); | |
894 subq(rsp, frame::arg_reg_save_area_bytes); | |
895 #endif | |
896 | |
897 // Align stack if necessary | |
898 testl(rsp, 15); | |
899 jcc(Assembler::zero, L); | |
900 | |
901 subq(rsp, 8); | |
902 { | |
903 call(RuntimeAddress(entry_point)); | |
904 } | |
905 addq(rsp, 8); | |
906 jmp(E); | |
907 | |
908 bind(L); | |
909 { | |
910 call(RuntimeAddress(entry_point)); | |
911 } | |
912 | |
913 bind(E); | |
914 | |
915 #ifdef _WIN64 | |
916 // restore stack pointer | |
917 addq(rsp, frame::arg_reg_save_area_bytes); | |
918 #endif | |
919 | |
920 } | |
921 | |
922 void MacroAssembler::cmp64(Register src1, AddressLiteral src2) { | |
923 assert(!src2.is_lval(), "should use cmpptr"); | |
924 | |
925 if (reachable(src2)) { | |
926 cmpq(src1, as_Address(src2)); | |
927 } else { | |
928 lea(rscratch1, src2); | |
929 Assembler::cmpq(src1, Address(rscratch1, 0)); | |
930 } | |
931 } | |
932 | |
933 int MacroAssembler::corrected_idivq(Register reg) { | |
934 // Full implementation of Java ldiv and lrem; checks for special | |
935 // case as described in JVM spec., p.243 & p.271. The function | |
936 // returns the (pc) offset of the idivl instruction - may be needed | |
937 // for implicit exceptions. | |
938 // | |
939 // normal case special case | |
940 // | |
941 // input : rax: dividend min_long | |
942 // reg: divisor (may not be eax/edx) -1 | |
943 // | |
944 // output: rax: quotient (= rax idiv reg) min_long | |
945 // rdx: remainder (= rax irem reg) 0 | |
946 assert(reg != rax && reg != rdx, "reg cannot be rax or rdx register"); | |
947 static const int64_t min_long = 0x8000000000000000; | |
948 Label normal_case, special_case; | |
949 | |
950 // check for special case | |
951 cmp64(rax, ExternalAddress((address) &min_long)); | |
952 jcc(Assembler::notEqual, normal_case); | |
953 xorl(rdx, rdx); // prepare rdx for possible special case (where | |
954 // remainder = 0) | |
955 cmpq(reg, -1); | |
956 jcc(Assembler::equal, special_case); | |
957 | |
958 // handle normal case | |
959 bind(normal_case); | |
960 cdqq(); | |
961 int idivq_offset = offset(); | |
962 idivq(reg); | |
963 | |
964 // normal and special case exit | |
965 bind(special_case); | |
966 | |
967 return idivq_offset; | |
968 } | |
969 | |
970 void MacroAssembler::decrementq(Register reg, int value) { | |
971 if (value == min_jint) { subq(reg, value); return; } | |
972 if (value < 0) { incrementq(reg, -value); return; } | |
973 if (value == 0) { ; return; } | |
974 if (value == 1 && UseIncDec) { decq(reg) ; return; } | |
975 /* else */ { subq(reg, value) ; return; } | |
976 } | |
977 | |
978 void MacroAssembler::decrementq(Address dst, int value) { | |
979 if (value == min_jint) { subq(dst, value); return; } | |
980 if (value < 0) { incrementq(dst, -value); return; } | |
981 if (value == 0) { ; return; } | |
982 if (value == 1 && UseIncDec) { decq(dst) ; return; } | |
983 /* else */ { subq(dst, value) ; return; } | |
984 } | |
985 | |
986 void MacroAssembler::incrementq(Register reg, int value) { | |
987 if (value == min_jint) { addq(reg, value); return; } | |
988 if (value < 0) { decrementq(reg, -value); return; } | |
989 if (value == 0) { ; return; } | |
990 if (value == 1 && UseIncDec) { incq(reg) ; return; } | |
991 /* else */ { addq(reg, value) ; return; } | |
992 } | |
993 | |
994 void MacroAssembler::incrementq(Address dst, int value) { | |
995 if (value == min_jint) { addq(dst, value); return; } | |
996 if (value < 0) { decrementq(dst, -value); return; } | |
997 if (value == 0) { ; return; } | |
998 if (value == 1 && UseIncDec) { incq(dst) ; return; } | |
999 /* else */ { addq(dst, value) ; return; } | |
1000 } | |
1001 | |
1002 // 32bit can do a case table jump in one instruction but we no longer allow the base | |
1003 // to be installed in the Address class | |
1004 void MacroAssembler::jump(ArrayAddress entry) { | |
1005 lea(rscratch1, entry.base()); | |
1006 Address dispatch = entry.index(); | |
1007 assert(dispatch._base == noreg, "must be"); | |
1008 dispatch._base = rscratch1; | |
1009 jmp(dispatch); | |
1010 } | |
1011 | |
1012 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) { | |
1013 ShouldNotReachHere(); // 64bit doesn't use two regs | |
1014 cmpq(x_lo, y_lo); | |
1015 } | |
1016 | |
1017 void MacroAssembler::lea(Register dst, AddressLiteral src) { | |
1018 mov_literal64(dst, (intptr_t)src.target(), src.rspec()); | |
1019 } | |
1020 | |
1021 void MacroAssembler::lea(Address dst, AddressLiteral adr) { | |
1022 mov_literal64(rscratch1, (intptr_t)adr.target(), adr.rspec()); | |
1023 movptr(dst, rscratch1); | |
1024 } | |
1025 | |
1026 void MacroAssembler::leave() { | |
1027 // %%% is this really better? Why not on 32bit too? | |
7430
d02120b7a34f
8004250: replace AbstractAssembler a_byte/a_long with emit_int8/emit_int32
twisti
parents:
7427
diff
changeset
|
1028 emit_int8((unsigned char)0xC9); // LEAVE |
7199 | 1029 } |
1030 | |
1031 void MacroAssembler::lneg(Register hi, Register lo) { | |
1032 ShouldNotReachHere(); // 64bit doesn't use two regs | |
1033 negq(lo); | |
1034 } | |
1035 | |
1036 void MacroAssembler::movoop(Register dst, jobject obj) { | |
1037 mov_literal64(dst, (intptr_t)obj, oop_Relocation::spec_for_immediate()); | |
1038 } | |
1039 | |
1040 void MacroAssembler::movoop(Address dst, jobject obj) { | |
1041 mov_literal64(rscratch1, (intptr_t)obj, oop_Relocation::spec_for_immediate()); | |
1042 movq(dst, rscratch1); | |
1043 } | |
1044 | |
1045 void MacroAssembler::mov_metadata(Register dst, Metadata* obj) { | |
1046 mov_literal64(dst, (intptr_t)obj, metadata_Relocation::spec_for_immediate()); | |
1047 } | |
1048 | |
1049 void MacroAssembler::mov_metadata(Address dst, Metadata* obj) { | |
1050 mov_literal64(rscratch1, (intptr_t)obj, metadata_Relocation::spec_for_immediate()); | |
1051 movq(dst, rscratch1); | |
1052 } | |
1053 | |
1054 void MacroAssembler::movptr(Register dst, AddressLiteral src) { | |
1055 if (src.is_lval()) { | |
1056 mov_literal64(dst, (intptr_t)src.target(), src.rspec()); | |
1057 } else { | |
1058 if (reachable(src)) { | |
1059 movq(dst, as_Address(src)); | |
1060 } else { | |
1061 lea(rscratch1, src); | |
1062 movq(dst, Address(rscratch1,0)); | |
1063 } | |
1064 } | |
1065 } | |
1066 | |
1067 void MacroAssembler::movptr(ArrayAddress dst, Register src) { | |
1068 movq(as_Address(dst), src); | |
1069 } | |
1070 | |
1071 void MacroAssembler::movptr(Register dst, ArrayAddress src) { | |
1072 movq(dst, as_Address(src)); | |
1073 } | |
1074 | |
1075 // src should NEVER be a real pointer. Use AddressLiteral for true pointers | |
1076 void MacroAssembler::movptr(Address dst, intptr_t src) { | |
1077 mov64(rscratch1, src); | |
1078 movq(dst, rscratch1); | |
1079 } | |
1080 | |
1081 // These are mostly for initializing NULL | |
1082 void MacroAssembler::movptr(Address dst, int32_t src) { | |
1083 movslq(dst, src); | |
1084 } | |
1085 | |
1086 void MacroAssembler::movptr(Register dst, int32_t src) { | |
1087 mov64(dst, (intptr_t)src); | |
1088 } | |
1089 | |
1090 void MacroAssembler::pushoop(jobject obj) { | |
1091 movoop(rscratch1, obj); | |
1092 push(rscratch1); | |
1093 } | |
1094 | |
1095 void MacroAssembler::pushklass(Metadata* obj) { | |
1096 mov_metadata(rscratch1, obj); | |
1097 push(rscratch1); | |
1098 } | |
1099 | |
1100 void MacroAssembler::pushptr(AddressLiteral src) { | |
1101 lea(rscratch1, src); | |
1102 if (src.is_lval()) { | |
1103 push(rscratch1); | |
1104 } else { | |
1105 pushq(Address(rscratch1, 0)); | |
1106 } | |
1107 } | |
1108 | |
1109 void MacroAssembler::reset_last_Java_frame(bool clear_fp, | |
1110 bool clear_pc) { | |
1111 // we must set sp to zero to clear frame | |
1112 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), NULL_WORD); | |
1113 // must clear fp, so that compiled frames are not confused; it is | |
1114 // possible that we need it only for debugging | |
1115 if (clear_fp) { | |
1116 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), NULL_WORD); | |
1117 } | |
1118 | |
1119 if (clear_pc) { | |
1120 movptr(Address(r15_thread, JavaThread::last_Java_pc_offset()), NULL_WORD); | |
1121 } | |
1122 } | |
1123 | |
1124 void MacroAssembler::set_last_Java_frame(Register last_java_sp, | |
1125 Register last_java_fp, | |
1126 address last_java_pc) { | |
1127 // determine last_java_sp register | |
1128 if (!last_java_sp->is_valid()) { | |
1129 last_java_sp = rsp; | |
1130 } | |
1131 | |
1132 // last_java_fp is optional | |
1133 if (last_java_fp->is_valid()) { | |
1134 movptr(Address(r15_thread, JavaThread::last_Java_fp_offset()), | |
1135 last_java_fp); | |
1136 } | |
1137 | |
1138 // last_java_pc is optional | |
1139 if (last_java_pc != NULL) { | |
1140 Address java_pc(r15_thread, | |
1141 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()); | |
1142 lea(rscratch1, InternalAddress(last_java_pc)); | |
1143 movptr(java_pc, rscratch1); | |
1144 } | |
1145 | |
1146 movptr(Address(r15_thread, JavaThread::last_Java_sp_offset()), last_java_sp); | |
1147 } | |
1148 | |
1149 static void pass_arg0(MacroAssembler* masm, Register arg) { | |
1150 if (c_rarg0 != arg ) { | |
1151 masm->mov(c_rarg0, arg); | |
1152 } | |
1153 } | |
1154 | |
1155 static void pass_arg1(MacroAssembler* masm, Register arg) { | |
1156 if (c_rarg1 != arg ) { | |
1157 masm->mov(c_rarg1, arg); | |
1158 } | |
1159 } | |
1160 | |
1161 static void pass_arg2(MacroAssembler* masm, Register arg) { | |
1162 if (c_rarg2 != arg ) { | |
1163 masm->mov(c_rarg2, arg); | |
1164 } | |
1165 } | |
1166 | |
1167 static void pass_arg3(MacroAssembler* masm, Register arg) { | |
1168 if (c_rarg3 != arg ) { | |
1169 masm->mov(c_rarg3, arg); | |
1170 } | |
1171 } | |
1172 | |
1173 void MacroAssembler::stop(const char* msg) { | |
1174 address rip = pc(); | |
1175 pusha(); // get regs on stack | |
1176 lea(c_rarg0, ExternalAddress((address) msg)); | |
1177 lea(c_rarg1, InternalAddress(rip)); | |
1178 movq(c_rarg2, rsp); // pass pointer to regs array | |
1179 andq(rsp, -16); // align stack as required by ABI | |
1180 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64))); | |
1181 hlt(); | |
1182 } | |
1183 | |
1184 void MacroAssembler::warn(const char* msg) { | |
1185 push(rbp); | |
1186 movq(rbp, rsp); | |
1187 andq(rsp, -16); // align stack as required by push_CPU_state and call | |
1188 push_CPU_state(); // keeps alignment at 16 bytes | |
1189 lea(c_rarg0, ExternalAddress((address) msg)); | |
1190 call_VM_leaf(CAST_FROM_FN_PTR(address, warning), c_rarg0); | |
1191 pop_CPU_state(); | |
1192 mov(rsp, rbp); | |
1193 pop(rbp); | |
1194 } | |
1195 | |
1196 void MacroAssembler::print_state() { | |
1197 address rip = pc(); | |
1198 pusha(); // get regs on stack | |
1199 push(rbp); | |
1200 movq(rbp, rsp); | |
1201 andq(rsp, -16); // align stack as required by push_CPU_state and call | |
1202 push_CPU_state(); // keeps alignment at 16 bytes | |
1203 | |
1204 lea(c_rarg0, InternalAddress(rip)); | |
1205 lea(c_rarg1, Address(rbp, wordSize)); // pass pointer to regs array | |
1206 call_VM_leaf(CAST_FROM_FN_PTR(address, MacroAssembler::print_state64), c_rarg0, c_rarg1); | |
1207 | |
1208 pop_CPU_state(); | |
1209 mov(rsp, rbp); | |
1210 pop(rbp); | |
1211 popa(); | |
1212 } | |
1213 | |
1214 #ifndef PRODUCT | |
1215 extern "C" void findpc(intptr_t x); | |
1216 #endif | |
1217 | |
1218 void MacroAssembler::debug64(char* msg, int64_t pc, int64_t regs[]) { | |
1219 // In order to get locks to work, we need to fake a in_VM state | |
1220 if (ShowMessageBoxOnError) { | |
1221 JavaThread* thread = JavaThread::current(); | |
1222 JavaThreadState saved_state = thread->thread_state(); | |
1223 thread->set_thread_state(_thread_in_vm); | |
1224 #ifndef PRODUCT | |
1225 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { | |
1226 ttyLocker ttyl; | |
1227 BytecodeCounter::print(); | |
1228 } | |
1229 #endif | |
1230 // To see where a verify_oop failed, get $ebx+40/X for this frame. | |
1231 // XXX correct this offset for amd64 | |
1232 // This is the value of eip which points to where verify_oop will return. | |
1233 if (os::message_box(msg, "Execution stopped, print registers?")) { | |
1234 print_state64(pc, regs); | |
1235 BREAKPOINT; | |
1236 assert(false, "start up GDB"); | |
1237 } | |
1238 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state); | |
1239 } else { | |
1240 ttyLocker ttyl; | |
1241 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", | |
1242 msg); | |
1243 assert(false, err_msg("DEBUG MESSAGE: %s", msg)); | |
1244 } | |
1245 } | |
1246 | |
1247 void MacroAssembler::print_state64(int64_t pc, int64_t regs[]) { | |
1248 ttyLocker ttyl; | |
1249 FlagSetting fs(Debugging, true); | |
1250 tty->print_cr("rip = 0x%016lx", pc); | |
1251 #ifndef PRODUCT | |
1252 tty->cr(); | |
1253 findpc(pc); | |
1254 tty->cr(); | |
1255 #endif | |
1256 #define PRINT_REG(rax, value) \ | |
1257 { tty->print("%s = ", #rax); os::print_location(tty, value); } | |
1258 PRINT_REG(rax, regs[15]); | |
1259 PRINT_REG(rbx, regs[12]); | |
1260 PRINT_REG(rcx, regs[14]); | |
1261 PRINT_REG(rdx, regs[13]); | |
1262 PRINT_REG(rdi, regs[8]); | |
1263 PRINT_REG(rsi, regs[9]); | |
1264 PRINT_REG(rbp, regs[10]); | |
1265 PRINT_REG(rsp, regs[11]); | |
1266 PRINT_REG(r8 , regs[7]); | |
1267 PRINT_REG(r9 , regs[6]); | |
1268 PRINT_REG(r10, regs[5]); | |
1269 PRINT_REG(r11, regs[4]); | |
1270 PRINT_REG(r12, regs[3]); | |
1271 PRINT_REG(r13, regs[2]); | |
1272 PRINT_REG(r14, regs[1]); | |
1273 PRINT_REG(r15, regs[0]); | |
1274 #undef PRINT_REG | |
1275 // Print some words near top of staack. | |
1276 int64_t* rsp = (int64_t*) regs[11]; | |
1277 int64_t* dump_sp = rsp; | |
1278 for (int col1 = 0; col1 < 8; col1++) { | |
1279 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (int64_t)dump_sp); | |
1280 os::print_location(tty, *dump_sp++); | |
1281 } | |
1282 for (int row = 0; row < 25; row++) { | |
1283 tty->print("(rsp+0x%03x) 0x%016lx: ", (int)((intptr_t)dump_sp - (intptr_t)rsp), (int64_t)dump_sp); | |
1284 for (int col = 0; col < 4; col++) { | |
1285 tty->print(" 0x%016lx", *dump_sp++); | |
1286 } | |
1287 tty->cr(); | |
1288 } | |
1289 // Print some instructions around pc: | |
1290 Disassembler::decode((address)pc-64, (address)pc); | |
1291 tty->print_cr("--------"); | |
1292 Disassembler::decode((address)pc, (address)pc+32); | |
1293 } | |
1294 | |
1295 #endif // _LP64 | |
1296 | |
1297 // Now versions that are common to 32/64 bit | |
1298 | |
1299 void MacroAssembler::addptr(Register dst, int32_t imm32) { | |
1300 LP64_ONLY(addq(dst, imm32)) NOT_LP64(addl(dst, imm32)); | |
1301 } | |
1302 | |
1303 void MacroAssembler::addptr(Register dst, Register src) { | |
1304 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src)); | |
1305 } | |
1306 | |
1307 void MacroAssembler::addptr(Address dst, Register src) { | |
1308 LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src)); | |
1309 } | |
1310 | |
1311 void MacroAssembler::addsd(XMMRegister dst, AddressLiteral src) { | |
1312 if (reachable(src)) { | |
1313 Assembler::addsd(dst, as_Address(src)); | |
1314 } else { | |
1315 lea(rscratch1, src); | |
1316 Assembler::addsd(dst, Address(rscratch1, 0)); | |
1317 } | |
1318 } | |
1319 | |
1320 void MacroAssembler::addss(XMMRegister dst, AddressLiteral src) { | |
1321 if (reachable(src)) { | |
1322 addss(dst, as_Address(src)); | |
1323 } else { | |
1324 lea(rscratch1, src); | |
1325 addss(dst, Address(rscratch1, 0)); | |
1326 } | |
1327 } | |
1328 | |
1329 void MacroAssembler::align(int modulus) { | |
1330 if (offset() % modulus != 0) { | |
1331 nop(modulus - (offset() % modulus)); | |
1332 } | |
1333 } | |
1334 | |
1335 void MacroAssembler::andpd(XMMRegister dst, AddressLiteral src) { | |
1336 // Used in sign-masking with aligned address. | |
1337 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); | |
1338 if (reachable(src)) { | |
1339 Assembler::andpd(dst, as_Address(src)); | |
1340 } else { | |
1341 lea(rscratch1, src); | |
1342 Assembler::andpd(dst, Address(rscratch1, 0)); | |
1343 } | |
1344 } | |
1345 | |
1346 void MacroAssembler::andps(XMMRegister dst, AddressLiteral src) { | |
1347 // Used in sign-masking with aligned address. | |
1348 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); | |
1349 if (reachable(src)) { | |
1350 Assembler::andps(dst, as_Address(src)); | |
1351 } else { | |
1352 lea(rscratch1, src); | |
1353 Assembler::andps(dst, Address(rscratch1, 0)); | |
1354 } | |
1355 } | |
1356 | |
1357 void MacroAssembler::andptr(Register dst, int32_t imm32) { | |
1358 LP64_ONLY(andq(dst, imm32)) NOT_LP64(andl(dst, imm32)); | |
1359 } | |
1360 | |
1361 void MacroAssembler::atomic_incl(AddressLiteral counter_addr) { | |
1362 pushf(); | |
1363 if (os::is_MP()) | |
1364 lock(); | |
1365 incrementl(counter_addr); | |
1366 popf(); | |
1367 } | |
1368 | |
1369 // Writes to stack successive pages until offset reached to check for | |
1370 // stack overflow + shadow pages. This clobbers tmp. | |
1371 void MacroAssembler::bang_stack_size(Register size, Register tmp) { | |
1372 movptr(tmp, rsp); | |
1373 // Bang stack for total size given plus shadow page size. | |
1374 // Bang one page at a time because large size can bang beyond yellow and | |
1375 // red zones. | |
1376 Label loop; | |
1377 bind(loop); | |
1378 movl(Address(tmp, (-os::vm_page_size())), size ); | |
1379 subptr(tmp, os::vm_page_size()); | |
1380 subl(size, os::vm_page_size()); | |
1381 jcc(Assembler::greater, loop); | |
1382 | |
1383 // Bang down shadow pages too. | |
1384 // The -1 because we already subtracted 1 page. | |
1385 for (int i = 0; i< StackShadowPages-1; i++) { | |
1386 // this could be any sized move but this is can be a debugging crumb | |
1387 // so the bigger the better. | |
1388 movptr(Address(tmp, (-i*os::vm_page_size())), size ); | |
1389 } | |
1390 } | |
1391 | |
1392 void MacroAssembler::biased_locking_exit(Register obj_reg, Register temp_reg, Label& done) { | |
1393 assert(UseBiasedLocking, "why call this otherwise?"); | |
1394 | |
1395 // Check for biased locking unlock case, which is a no-op | |
1396 // Note: we do not have to check the thread ID for two reasons. | |
1397 // First, the interpreter checks for IllegalMonitorStateException at | |
1398 // a higher level. Second, if the bias was revoked while we held the | |
1399 // lock, the object could not be rebiased toward another thread, so | |
1400 // the bias bit would be clear. | |
1401 movptr(temp_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes())); | |
1402 andptr(temp_reg, markOopDesc::biased_lock_mask_in_place); | |
1403 cmpptr(temp_reg, markOopDesc::biased_lock_pattern); | |
1404 jcc(Assembler::equal, done); | |
1405 } | |
1406 | |
1407 void MacroAssembler::c2bool(Register x) { | |
1408 // implements x == 0 ? 0 : 1 | |
1409 // note: must only look at least-significant byte of x | |
1410 // since C-style booleans are stored in one byte | |
1411 // only! (was bug) | |
1412 andl(x, 0xFF); | |
1413 setb(Assembler::notZero, x); | |
1414 } | |
1415 | |
1416 // Wouldn't need if AddressLiteral version had new name | |
1417 void MacroAssembler::call(Label& L, relocInfo::relocType rtype) { | |
1418 Assembler::call(L, rtype); | |
1419 } | |
1420 | |
1421 void MacroAssembler::call(Register entry) { | |
1422 Assembler::call(entry); | |
1423 } | |
1424 | |
1425 void MacroAssembler::call(AddressLiteral entry) { | |
1426 if (reachable(entry)) { | |
1427 Assembler::call_literal(entry.target(), entry.rspec()); | |
1428 } else { | |
1429 lea(rscratch1, entry); | |
1430 Assembler::call(rscratch1); | |
1431 } | |
1432 } | |
1433 | |
1434 void MacroAssembler::ic_call(address entry) { | |
1435 RelocationHolder rh = virtual_call_Relocation::spec(pc()); | |
1436 movptr(rax, (intptr_t)Universe::non_oop_word()); | |
1437 call(AddressLiteral(entry, rh)); | |
1438 } | |
1439 | |
1440 // Implementation of call_VM versions | |
1441 | |
1442 void MacroAssembler::call_VM(Register oop_result, | |
1443 address entry_point, | |
1444 bool check_exceptions) { | |
1445 Label C, E; | |
1446 call(C, relocInfo::none); | |
1447 jmp(E); | |
1448 | |
1449 bind(C); | |
1450 call_VM_helper(oop_result, entry_point, 0, check_exceptions); | |
1451 ret(0); | |
1452 | |
1453 bind(E); | |
1454 } | |
1455 | |
1456 void MacroAssembler::call_VM(Register oop_result, | |
1457 address entry_point, | |
1458 Register arg_1, | |
1459 bool check_exceptions) { | |
1460 Label C, E; | |
1461 call(C, relocInfo::none); | |
1462 jmp(E); | |
1463 | |
1464 bind(C); | |
1465 pass_arg1(this, arg_1); | |
1466 call_VM_helper(oop_result, entry_point, 1, check_exceptions); | |
1467 ret(0); | |
1468 | |
1469 bind(E); | |
1470 } | |
1471 | |
1472 void MacroAssembler::call_VM(Register oop_result, | |
1473 address entry_point, | |
1474 Register arg_1, | |
1475 Register arg_2, | |
1476 bool check_exceptions) { | |
1477 Label C, E; | |
1478 call(C, relocInfo::none); | |
1479 jmp(E); | |
1480 | |
1481 bind(C); | |
1482 | |
1483 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
1484 | |
1485 pass_arg2(this, arg_2); | |
1486 pass_arg1(this, arg_1); | |
1487 call_VM_helper(oop_result, entry_point, 2, check_exceptions); | |
1488 ret(0); | |
1489 | |
1490 bind(E); | |
1491 } | |
1492 | |
1493 void MacroAssembler::call_VM(Register oop_result, | |
1494 address entry_point, | |
1495 Register arg_1, | |
1496 Register arg_2, | |
1497 Register arg_3, | |
1498 bool check_exceptions) { | |
1499 Label C, E; | |
1500 call(C, relocInfo::none); | |
1501 jmp(E); | |
1502 | |
1503 bind(C); | |
1504 | |
1505 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); | |
1506 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); | |
1507 pass_arg3(this, arg_3); | |
1508 | |
1509 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
1510 pass_arg2(this, arg_2); | |
1511 | |
1512 pass_arg1(this, arg_1); | |
1513 call_VM_helper(oop_result, entry_point, 3, check_exceptions); | |
1514 ret(0); | |
1515 | |
1516 bind(E); | |
1517 } | |
1518 | |
1519 void MacroAssembler::call_VM(Register oop_result, | |
1520 Register last_java_sp, | |
1521 address entry_point, | |
1522 int number_of_arguments, | |
1523 bool check_exceptions) { | |
1524 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg); | |
1525 call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions); | |
1526 } | |
1527 | |
1528 void MacroAssembler::call_VM(Register oop_result, | |
1529 Register last_java_sp, | |
1530 address entry_point, | |
1531 Register arg_1, | |
1532 bool check_exceptions) { | |
1533 pass_arg1(this, arg_1); | |
1534 call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions); | |
1535 } | |
1536 | |
1537 void MacroAssembler::call_VM(Register oop_result, | |
1538 Register last_java_sp, | |
1539 address entry_point, | |
1540 Register arg_1, | |
1541 Register arg_2, | |
1542 bool check_exceptions) { | |
1543 | |
1544 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
1545 pass_arg2(this, arg_2); | |
1546 pass_arg1(this, arg_1); | |
1547 call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions); | |
1548 } | |
1549 | |
1550 void MacroAssembler::call_VM(Register oop_result, | |
1551 Register last_java_sp, | |
1552 address entry_point, | |
1553 Register arg_1, | |
1554 Register arg_2, | |
1555 Register arg_3, | |
1556 bool check_exceptions) { | |
1557 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); | |
1558 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); | |
1559 pass_arg3(this, arg_3); | |
1560 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
1561 pass_arg2(this, arg_2); | |
1562 pass_arg1(this, arg_1); | |
1563 call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions); | |
1564 } | |
1565 | |
1566 void MacroAssembler::super_call_VM(Register oop_result, | |
1567 Register last_java_sp, | |
1568 address entry_point, | |
1569 int number_of_arguments, | |
1570 bool check_exceptions) { | |
1571 Register thread = LP64_ONLY(r15_thread) NOT_LP64(noreg); | |
1572 MacroAssembler::call_VM_base(oop_result, thread, last_java_sp, entry_point, number_of_arguments, check_exceptions); | |
1573 } | |
1574 | |
1575 void MacroAssembler::super_call_VM(Register oop_result, | |
1576 Register last_java_sp, | |
1577 address entry_point, | |
1578 Register arg_1, | |
1579 bool check_exceptions) { | |
1580 pass_arg1(this, arg_1); | |
1581 super_call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions); | |
1582 } | |
1583 | |
1584 void MacroAssembler::super_call_VM(Register oop_result, | |
1585 Register last_java_sp, | |
1586 address entry_point, | |
1587 Register arg_1, | |
1588 Register arg_2, | |
1589 bool check_exceptions) { | |
1590 | |
1591 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
1592 pass_arg2(this, arg_2); | |
1593 pass_arg1(this, arg_1); | |
1594 super_call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions); | |
1595 } | |
1596 | |
1597 void MacroAssembler::super_call_VM(Register oop_result, | |
1598 Register last_java_sp, | |
1599 address entry_point, | |
1600 Register arg_1, | |
1601 Register arg_2, | |
1602 Register arg_3, | |
1603 bool check_exceptions) { | |
1604 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); | |
1605 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); | |
1606 pass_arg3(this, arg_3); | |
1607 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
1608 pass_arg2(this, arg_2); | |
1609 pass_arg1(this, arg_1); | |
1610 super_call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions); | |
1611 } | |
1612 | |
1613 void MacroAssembler::call_VM_base(Register oop_result, | |
1614 Register java_thread, | |
1615 Register last_java_sp, | |
1616 address entry_point, | |
1617 int number_of_arguments, | |
1618 bool check_exceptions) { | |
1619 // determine java_thread register | |
1620 if (!java_thread->is_valid()) { | |
1621 #ifdef _LP64 | |
1622 java_thread = r15_thread; | |
1623 #else | |
1624 java_thread = rdi; | |
1625 get_thread(java_thread); | |
1626 #endif // LP64 | |
1627 } | |
1628 // determine last_java_sp register | |
1629 if (!last_java_sp->is_valid()) { | |
1630 last_java_sp = rsp; | |
1631 } | |
1632 // debugging support | |
1633 assert(number_of_arguments >= 0 , "cannot have negative number of arguments"); | |
1634 LP64_ONLY(assert(java_thread == r15_thread, "unexpected register")); | |
1635 #ifdef ASSERT | |
1636 // TraceBytecodes does not use r12 but saves it over the call, so don't verify | |
1637 // r12 is the heapbase. | |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12056
diff
changeset
|
1638 LP64_ONLY(if ((UseCompressedOops || UseCompressedClassPointers) && !TraceBytecodes) verify_heapbase("call_VM_base: heap base corrupted?");) |
7199 | 1639 #endif // ASSERT |
1640 | |
1641 assert(java_thread != oop_result , "cannot use the same register for java_thread & oop_result"); | |
1642 assert(java_thread != last_java_sp, "cannot use the same register for java_thread & last_java_sp"); | |
1643 | |
1644 // push java thread (becomes first argument of C function) | |
1645 | |
1646 NOT_LP64(push(java_thread); number_of_arguments++); | |
1647 LP64_ONLY(mov(c_rarg0, r15_thread)); | |
1648 | |
1649 // set last Java frame before call | |
1650 assert(last_java_sp != rbp, "can't use ebp/rbp"); | |
1651 | |
1652 // Only interpreter should have to set fp | |
1653 set_last_Java_frame(java_thread, last_java_sp, rbp, NULL); | |
1654 | |
1655 // do the call, remove parameters | |
1656 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments); | |
1657 | |
1658 // restore the thread (cannot use the pushed argument since arguments | |
1659 // may be overwritten by C code generated by an optimizing compiler); | |
1660 // however can use the register value directly if it is callee saved. | |
1661 if (LP64_ONLY(true ||) java_thread == rdi || java_thread == rsi) { | |
1662 // rdi & rsi (also r15) are callee saved -> nothing to do | |
1663 #ifdef ASSERT | |
1664 guarantee(java_thread != rax, "change this code"); | |
1665 push(rax); | |
1666 { Label L; | |
1667 get_thread(rax); | |
1668 cmpptr(java_thread, rax); | |
1669 jcc(Assembler::equal, L); | |
1670 STOP("MacroAssembler::call_VM_base: rdi not callee saved?"); | |
1671 bind(L); | |
1672 } | |
1673 pop(rax); | |
1674 #endif | |
1675 } else { | |
1676 get_thread(java_thread); | |
1677 } | |
1678 // reset last Java frame | |
1679 // Only interpreter should have to clear fp | |
1680 reset_last_Java_frame(java_thread, true, false); | |
1681 | |
1682 #ifndef CC_INTERP | |
1683 // C++ interp handles this in the interpreter | |
1684 check_and_handle_popframe(java_thread); | |
1685 check_and_handle_earlyret(java_thread); | |
1686 #endif /* CC_INTERP */ | |
1687 | |
1688 if (check_exceptions) { | |
1689 // check for pending exceptions (java_thread is set upon return) | |
1690 cmpptr(Address(java_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); | |
1691 #ifndef _LP64 | |
1692 jump_cc(Assembler::notEqual, | |
1693 RuntimeAddress(StubRoutines::forward_exception_entry())); | |
1694 #else | |
1695 // This used to conditionally jump to forward_exception however it is | |
1696 // possible if we relocate that the branch will not reach. So we must jump | |
1697 // around so we can always reach | |
1698 | |
1699 Label ok; | |
1700 jcc(Assembler::equal, ok); | |
1701 jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
1702 bind(ok); | |
1703 #endif // LP64 | |
1704 } | |
1705 | |
1706 // get oop result if there is one and reset the value in the thread | |
1707 if (oop_result->is_valid()) { | |
1708 get_vm_result(oop_result, java_thread); | |
1709 } | |
1710 } | |
1711 | |
1712 void MacroAssembler::call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions) { | |
1713 | |
1714 // Calculate the value for last_Java_sp | |
1715 // somewhat subtle. call_VM does an intermediate call | |
1716 // which places a return address on the stack just under the | |
1717 // stack pointer as the user finsihed with it. This allows | |
1718 // use to retrieve last_Java_pc from last_Java_sp[-1]. | |
1719 // On 32bit we then have to push additional args on the stack to accomplish | |
1720 // the actual requested call. On 64bit call_VM only can use register args | |
1721 // so the only extra space is the return address that call_VM created. | |
1722 // This hopefully explains the calculations here. | |
1723 | |
1724 #ifdef _LP64 | |
1725 // We've pushed one address, correct last_Java_sp | |
1726 lea(rax, Address(rsp, wordSize)); | |
1727 #else | |
1728 lea(rax, Address(rsp, (1 + number_of_arguments) * wordSize)); | |
1729 #endif // LP64 | |
1730 | |
1731 call_VM_base(oop_result, noreg, rax, entry_point, number_of_arguments, check_exceptions); | |
1732 | |
1733 } | |
1734 | |
1735 void MacroAssembler::call_VM_leaf(address entry_point, int number_of_arguments) { | |
1736 call_VM_leaf_base(entry_point, number_of_arguments); | |
1737 } | |
1738 | |
1739 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0) { | |
1740 pass_arg0(this, arg_0); | |
1741 call_VM_leaf(entry_point, 1); | |
1742 } | |
1743 | |
1744 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1) { | |
1745 | |
1746 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); | |
1747 pass_arg1(this, arg_1); | |
1748 pass_arg0(this, arg_0); | |
1749 call_VM_leaf(entry_point, 2); | |
1750 } | |
1751 | |
1752 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) { | |
1753 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg")); | |
1754 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
1755 pass_arg2(this, arg_2); | |
1756 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); | |
1757 pass_arg1(this, arg_1); | |
1758 pass_arg0(this, arg_0); | |
1759 call_VM_leaf(entry_point, 3); | |
1760 } | |
1761 | |
1762 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0) { | |
1763 pass_arg0(this, arg_0); | |
1764 MacroAssembler::call_VM_leaf_base(entry_point, 1); | |
1765 } | |
1766 | |
1767 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1) { | |
1768 | |
1769 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); | |
1770 pass_arg1(this, arg_1); | |
1771 pass_arg0(this, arg_0); | |
1772 MacroAssembler::call_VM_leaf_base(entry_point, 2); | |
1773 } | |
1774 | |
1775 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2) { | |
1776 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg")); | |
1777 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
1778 pass_arg2(this, arg_2); | |
1779 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); | |
1780 pass_arg1(this, arg_1); | |
1781 pass_arg0(this, arg_0); | |
1782 MacroAssembler::call_VM_leaf_base(entry_point, 3); | |
1783 } | |
1784 | |
1785 void MacroAssembler::super_call_VM_leaf(address entry_point, Register arg_0, Register arg_1, Register arg_2, Register arg_3) { | |
1786 LP64_ONLY(assert(arg_0 != c_rarg3, "smashed arg")); | |
1787 LP64_ONLY(assert(arg_1 != c_rarg3, "smashed arg")); | |
1788 LP64_ONLY(assert(arg_2 != c_rarg3, "smashed arg")); | |
1789 pass_arg3(this, arg_3); | |
1790 LP64_ONLY(assert(arg_0 != c_rarg2, "smashed arg")); | |
1791 LP64_ONLY(assert(arg_1 != c_rarg2, "smashed arg")); | |
1792 pass_arg2(this, arg_2); | |
1793 LP64_ONLY(assert(arg_0 != c_rarg1, "smashed arg")); | |
1794 pass_arg1(this, arg_1); | |
1795 pass_arg0(this, arg_0); | |
1796 MacroAssembler::call_VM_leaf_base(entry_point, 4); | |
1797 } | |
1798 | |
1799 void MacroAssembler::get_vm_result(Register oop_result, Register java_thread) { | |
1800 movptr(oop_result, Address(java_thread, JavaThread::vm_result_offset())); | |
1801 movptr(Address(java_thread, JavaThread::vm_result_offset()), NULL_WORD); | |
1802 verify_oop(oop_result, "broken oop in call_VM_base"); | |
1803 } | |
1804 | |
1805 void MacroAssembler::get_vm_result_2(Register metadata_result, Register java_thread) { | |
1806 movptr(metadata_result, Address(java_thread, JavaThread::vm_result_2_offset())); | |
1807 movptr(Address(java_thread, JavaThread::vm_result_2_offset()), NULL_WORD); | |
1808 } | |
1809 | |
1810 void MacroAssembler::check_and_handle_earlyret(Register java_thread) { | |
1811 } | |
1812 | |
1813 void MacroAssembler::check_and_handle_popframe(Register java_thread) { | |
1814 } | |
1815 | |
1816 void MacroAssembler::cmp32(AddressLiteral src1, int32_t imm) { | |
1817 if (reachable(src1)) { | |
1818 cmpl(as_Address(src1), imm); | |
1819 } else { | |
1820 lea(rscratch1, src1); | |
1821 cmpl(Address(rscratch1, 0), imm); | |
1822 } | |
1823 } | |
1824 | |
1825 void MacroAssembler::cmp32(Register src1, AddressLiteral src2) { | |
1826 assert(!src2.is_lval(), "use cmpptr"); | |
1827 if (reachable(src2)) { | |
1828 cmpl(src1, as_Address(src2)); | |
1829 } else { | |
1830 lea(rscratch1, src2); | |
1831 cmpl(src1, Address(rscratch1, 0)); | |
1832 } | |
1833 } | |
1834 | |
1835 void MacroAssembler::cmp32(Register src1, int32_t imm) { | |
1836 Assembler::cmpl(src1, imm); | |
1837 } | |
1838 | |
1839 void MacroAssembler::cmp32(Register src1, Address src2) { | |
1840 Assembler::cmpl(src1, src2); | |
1841 } | |
1842 | |
1843 void MacroAssembler::cmpsd2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) { | |
1844 ucomisd(opr1, opr2); | |
1845 | |
1846 Label L; | |
1847 if (unordered_is_less) { | |
1848 movl(dst, -1); | |
1849 jcc(Assembler::parity, L); | |
1850 jcc(Assembler::below , L); | |
1851 movl(dst, 0); | |
1852 jcc(Assembler::equal , L); | |
1853 increment(dst); | |
1854 } else { // unordered is greater | |
1855 movl(dst, 1); | |
1856 jcc(Assembler::parity, L); | |
1857 jcc(Assembler::above , L); | |
1858 movl(dst, 0); | |
1859 jcc(Assembler::equal , L); | |
1860 decrementl(dst); | |
1861 } | |
1862 bind(L); | |
1863 } | |
1864 | |
1865 void MacroAssembler::cmpss2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) { | |
1866 ucomiss(opr1, opr2); | |
1867 | |
1868 Label L; | |
1869 if (unordered_is_less) { | |
1870 movl(dst, -1); | |
1871 jcc(Assembler::parity, L); | |
1872 jcc(Assembler::below , L); | |
1873 movl(dst, 0); | |
1874 jcc(Assembler::equal , L); | |
1875 increment(dst); | |
1876 } else { // unordered is greater | |
1877 movl(dst, 1); | |
1878 jcc(Assembler::parity, L); | |
1879 jcc(Assembler::above , L); | |
1880 movl(dst, 0); | |
1881 jcc(Assembler::equal , L); | |
1882 decrementl(dst); | |
1883 } | |
1884 bind(L); | |
1885 } | |
1886 | |
1887 | |
1888 void MacroAssembler::cmp8(AddressLiteral src1, int imm) { | |
1889 if (reachable(src1)) { | |
1890 cmpb(as_Address(src1), imm); | |
1891 } else { | |
1892 lea(rscratch1, src1); | |
1893 cmpb(Address(rscratch1, 0), imm); | |
1894 } | |
1895 } | |
1896 | |
1897 void MacroAssembler::cmpptr(Register src1, AddressLiteral src2) { | |
1898 #ifdef _LP64 | |
1899 if (src2.is_lval()) { | |
1900 movptr(rscratch1, src2); | |
1901 Assembler::cmpq(src1, rscratch1); | |
1902 } else if (reachable(src2)) { | |
1903 cmpq(src1, as_Address(src2)); | |
1904 } else { | |
1905 lea(rscratch1, src2); | |
1906 Assembler::cmpq(src1, Address(rscratch1, 0)); | |
1907 } | |
1908 #else | |
1909 if (src2.is_lval()) { | |
1910 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec()); | |
1911 } else { | |
1912 cmpl(src1, as_Address(src2)); | |
1913 } | |
1914 #endif // _LP64 | |
1915 } | |
1916 | |
1917 void MacroAssembler::cmpptr(Address src1, AddressLiteral src2) { | |
1918 assert(src2.is_lval(), "not a mem-mem compare"); | |
1919 #ifdef _LP64 | |
1920 // moves src2's literal address | |
1921 movptr(rscratch1, src2); | |
1922 Assembler::cmpq(src1, rscratch1); | |
1923 #else | |
1924 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec()); | |
1925 #endif // _LP64 | |
1926 } | |
1927 | |
1928 void MacroAssembler::locked_cmpxchgptr(Register reg, AddressLiteral adr) { | |
1929 if (reachable(adr)) { | |
1930 if (os::is_MP()) | |
1931 lock(); | |
1932 cmpxchgptr(reg, as_Address(adr)); | |
1933 } else { | |
1934 lea(rscratch1, adr); | |
1935 if (os::is_MP()) | |
1936 lock(); | |
1937 cmpxchgptr(reg, Address(rscratch1, 0)); | |
1938 } | |
1939 } | |
1940 | |
1941 void MacroAssembler::cmpxchgptr(Register reg, Address adr) { | |
1942 LP64_ONLY(cmpxchgq(reg, adr)) NOT_LP64(cmpxchgl(reg, adr)); | |
1943 } | |
1944 | |
1945 void MacroAssembler::comisd(XMMRegister dst, AddressLiteral src) { | |
1946 if (reachable(src)) { | |
1947 Assembler::comisd(dst, as_Address(src)); | |
1948 } else { | |
1949 lea(rscratch1, src); | |
1950 Assembler::comisd(dst, Address(rscratch1, 0)); | |
1951 } | |
1952 } | |
1953 | |
1954 void MacroAssembler::comiss(XMMRegister dst, AddressLiteral src) { | |
1955 if (reachable(src)) { | |
1956 Assembler::comiss(dst, as_Address(src)); | |
1957 } else { | |
1958 lea(rscratch1, src); | |
1959 Assembler::comiss(dst, Address(rscratch1, 0)); | |
1960 } | |
1961 } | |
1962 | |
1963 | |
1964 void MacroAssembler::cond_inc32(Condition cond, AddressLiteral counter_addr) { | |
1965 Condition negated_cond = negate_condition(cond); | |
1966 Label L; | |
1967 jcc(negated_cond, L); | |
1968 atomic_incl(counter_addr); | |
1969 bind(L); | |
1970 } | |
1971 | |
1972 int MacroAssembler::corrected_idivl(Register reg) { | |
1973 // Full implementation of Java idiv and irem; checks for | |
1974 // special case as described in JVM spec., p.243 & p.271. | |
1975 // The function returns the (pc) offset of the idivl | |
1976 // instruction - may be needed for implicit exceptions. | |
1977 // | |
1978 // normal case special case | |
1979 // | |
1980 // input : rax,: dividend min_int | |
1981 // reg: divisor (may not be rax,/rdx) -1 | |
1982 // | |
1983 // output: rax,: quotient (= rax, idiv reg) min_int | |
1984 // rdx: remainder (= rax, irem reg) 0 | |
1985 assert(reg != rax && reg != rdx, "reg cannot be rax, or rdx register"); | |
1986 const int min_int = 0x80000000; | |
1987 Label normal_case, special_case; | |
1988 | |
1989 // check for special case | |
1990 cmpl(rax, min_int); | |
1991 jcc(Assembler::notEqual, normal_case); | |
1992 xorl(rdx, rdx); // prepare rdx for possible special case (where remainder = 0) | |
1993 cmpl(reg, -1); | |
1994 jcc(Assembler::equal, special_case); | |
1995 | |
1996 // handle normal case | |
1997 bind(normal_case); | |
1998 cdql(); | |
1999 int idivl_offset = offset(); | |
2000 idivl(reg); | |
2001 | |
2002 // normal and special case exit | |
2003 bind(special_case); | |
2004 | |
2005 return idivl_offset; | |
2006 } | |
2007 | |
2008 | |
2009 | |
2010 void MacroAssembler::decrementl(Register reg, int value) { | |
2011 if (value == min_jint) {subl(reg, value) ; return; } | |
2012 if (value < 0) { incrementl(reg, -value); return; } | |
2013 if (value == 0) { ; return; } | |
2014 if (value == 1 && UseIncDec) { decl(reg) ; return; } | |
2015 /* else */ { subl(reg, value) ; return; } | |
2016 } | |
2017 | |
2018 void MacroAssembler::decrementl(Address dst, int value) { | |
2019 if (value == min_jint) {subl(dst, value) ; return; } | |
2020 if (value < 0) { incrementl(dst, -value); return; } | |
2021 if (value == 0) { ; return; } | |
2022 if (value == 1 && UseIncDec) { decl(dst) ; return; } | |
2023 /* else */ { subl(dst, value) ; return; } | |
2024 } | |
2025 | |
2026 void MacroAssembler::division_with_shift (Register reg, int shift_value) { | |
2027 assert (shift_value > 0, "illegal shift value"); | |
2028 Label _is_positive; | |
2029 testl (reg, reg); | |
2030 jcc (Assembler::positive, _is_positive); | |
2031 int offset = (1 << shift_value) - 1 ; | |
2032 | |
2033 if (offset == 1) { | |
2034 incrementl(reg); | |
2035 } else { | |
2036 addl(reg, offset); | |
2037 } | |
2038 | |
2039 bind (_is_positive); | |
2040 sarl(reg, shift_value); | |
2041 } | |
2042 | |
2043 void MacroAssembler::divsd(XMMRegister dst, AddressLiteral src) { | |
2044 if (reachable(src)) { | |
2045 Assembler::divsd(dst, as_Address(src)); | |
2046 } else { | |
2047 lea(rscratch1, src); | |
2048 Assembler::divsd(dst, Address(rscratch1, 0)); | |
2049 } | |
2050 } | |
2051 | |
2052 void MacroAssembler::divss(XMMRegister dst, AddressLiteral src) { | |
2053 if (reachable(src)) { | |
2054 Assembler::divss(dst, as_Address(src)); | |
2055 } else { | |
2056 lea(rscratch1, src); | |
2057 Assembler::divss(dst, Address(rscratch1, 0)); | |
2058 } | |
2059 } | |
2060 | |
2061 // !defined(COMPILER2) is because of stupid core builds | |
8265
ded5288f5b96
fix windows build of the server and client vms
Andreas Woess <andreas.woess@jku.at>
parents:
8042
diff
changeset
|
2062 #if !defined(_LP64) || defined(COMPILER1) || !defined(COMPILER2) || defined(GRAAL) |
7199 | 2063 void MacroAssembler::empty_FPU_stack() { |
2064 if (VM_Version::supports_mmx()) { | |
2065 emms(); | |
2066 } else { | |
2067 for (int i = 8; i-- > 0; ) ffree(i); | |
2068 } | |
2069 } | |
2070 #endif // !LP64 || C1 || !C2 | |
2071 | |
2072 | |
2073 // Defines obj, preserves var_size_in_bytes | |
2074 void MacroAssembler::eden_allocate(Register obj, | |
2075 Register var_size_in_bytes, | |
2076 int con_size_in_bytes, | |
2077 Register t1, | |
2078 Label& slow_case) { | |
2079 assert(obj == rax, "obj must be in rax, for cmpxchg"); | |
2080 assert_different_registers(obj, var_size_in_bytes, t1); | |
2081 if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) { | |
2082 jmp(slow_case); | |
2083 } else { | |
2084 Register end = t1; | |
2085 Label retry; | |
2086 bind(retry); | |
2087 ExternalAddress heap_top((address) Universe::heap()->top_addr()); | |
2088 movptr(obj, heap_top); | |
2089 if (var_size_in_bytes == noreg) { | |
2090 lea(end, Address(obj, con_size_in_bytes)); | |
2091 } else { | |
2092 lea(end, Address(obj, var_size_in_bytes, Address::times_1)); | |
2093 } | |
2094 // if end < obj then we wrapped around => object too long => slow case | |
2095 cmpptr(end, obj); | |
2096 jcc(Assembler::below, slow_case); | |
2097 cmpptr(end, ExternalAddress((address) Universe::heap()->end_addr())); | |
2098 jcc(Assembler::above, slow_case); | |
2099 // Compare obj with the top addr, and if still equal, store the new top addr in | |
2100 // end at the address of the top addr pointer. Sets ZF if was equal, and clears | |
2101 // it otherwise. Use lock prefix for atomicity on MPs. | |
2102 locked_cmpxchgptr(end, heap_top); | |
2103 jcc(Assembler::notEqual, retry); | |
2104 } | |
2105 } | |
2106 | |
2107 void MacroAssembler::enter() { | |
2108 push(rbp); | |
2109 mov(rbp, rsp); | |
2110 } | |
2111 | |
2112 // A 5 byte nop that is safe for patching (see patch_verified_entry) | |
2113 void MacroAssembler::fat_nop() { | |
2114 if (UseAddressNop) { | |
2115 addr_nop_5(); | |
2116 } else { | |
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2117 emit_int8(0x26); // es: |
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2118 emit_int8(0x2e); // cs: |
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2119 emit_int8(0x64); // fs: |
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2120 emit_int8(0x65); // gs: |
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2121 emit_int8((unsigned char)0x90); |
7199 | 2122 } |
2123 } | |
2124 | |
2125 void MacroAssembler::fcmp(Register tmp) { | |
2126 fcmp(tmp, 1, true, true); | |
2127 } | |
2128 | |
2129 void MacroAssembler::fcmp(Register tmp, int index, bool pop_left, bool pop_right) { | |
2130 assert(!pop_right || pop_left, "usage error"); | |
2131 if (VM_Version::supports_cmov()) { | |
2132 assert(tmp == noreg, "unneeded temp"); | |
2133 if (pop_left) { | |
2134 fucomip(index); | |
2135 } else { | |
2136 fucomi(index); | |
2137 } | |
2138 if (pop_right) { | |
2139 fpop(); | |
2140 } | |
2141 } else { | |
2142 assert(tmp != noreg, "need temp"); | |
2143 if (pop_left) { | |
2144 if (pop_right) { | |
2145 fcompp(); | |
2146 } else { | |
2147 fcomp(index); | |
2148 } | |
2149 } else { | |
2150 fcom(index); | |
2151 } | |
2152 // convert FPU condition into eflags condition via rax, | |
2153 save_rax(tmp); | |
2154 fwait(); fnstsw_ax(); | |
2155 sahf(); | |
2156 restore_rax(tmp); | |
2157 } | |
2158 // condition codes set as follows: | |
2159 // | |
2160 // CF (corresponds to C0) if x < y | |
2161 // PF (corresponds to C2) if unordered | |
2162 // ZF (corresponds to C3) if x = y | |
2163 } | |
2164 | |
2165 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less) { | |
2166 fcmp2int(dst, unordered_is_less, 1, true, true); | |
2167 } | |
2168 | |
2169 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less, int index, bool pop_left, bool pop_right) { | |
2170 fcmp(VM_Version::supports_cmov() ? noreg : dst, index, pop_left, pop_right); | |
2171 Label L; | |
2172 if (unordered_is_less) { | |
2173 movl(dst, -1); | |
2174 jcc(Assembler::parity, L); | |
2175 jcc(Assembler::below , L); | |
2176 movl(dst, 0); | |
2177 jcc(Assembler::equal , L); | |
2178 increment(dst); | |
2179 } else { // unordered is greater | |
2180 movl(dst, 1); | |
2181 jcc(Assembler::parity, L); | |
2182 jcc(Assembler::above , L); | |
2183 movl(dst, 0); | |
2184 jcc(Assembler::equal , L); | |
2185 decrementl(dst); | |
2186 } | |
2187 bind(L); | |
2188 } | |
2189 | |
2190 void MacroAssembler::fld_d(AddressLiteral src) { | |
2191 fld_d(as_Address(src)); | |
2192 } | |
2193 | |
2194 void MacroAssembler::fld_s(AddressLiteral src) { | |
2195 fld_s(as_Address(src)); | |
2196 } | |
2197 | |
2198 void MacroAssembler::fld_x(AddressLiteral src) { | |
2199 Assembler::fld_x(as_Address(src)); | |
2200 } | |
2201 | |
2202 void MacroAssembler::fldcw(AddressLiteral src) { | |
2203 Assembler::fldcw(as_Address(src)); | |
2204 } | |
2205 | |
2206 void MacroAssembler::pow_exp_core_encoding() { | |
2207 // kills rax, rcx, rdx | |
2208 subptr(rsp,sizeof(jdouble)); | |
2209 // computes 2^X. Stack: X ... | |
2210 // f2xm1 computes 2^X-1 but only operates on -1<=X<=1. Get int(X) and | |
2211 // keep it on the thread's stack to compute 2^int(X) later | |
2212 // then compute 2^(X-int(X)) as (2^(X-int(X)-1+1) | |
2213 // final result is obtained with: 2^X = 2^int(X) * 2^(X-int(X)) | |
2214 fld_s(0); // Stack: X X ... | |
2215 frndint(); // Stack: int(X) X ... | |
2216 fsuba(1); // Stack: int(X) X-int(X) ... | |
2217 fistp_s(Address(rsp,0)); // move int(X) as integer to thread's stack. Stack: X-int(X) ... | |
2218 f2xm1(); // Stack: 2^(X-int(X))-1 ... | |
2219 fld1(); // Stack: 1 2^(X-int(X))-1 ... | |
2220 faddp(1); // Stack: 2^(X-int(X)) | |
2221 // computes 2^(int(X)): add exponent bias (1023) to int(X), then | |
2222 // shift int(X)+1023 to exponent position. | |
2223 // Exponent is limited to 11 bits if int(X)+1023 does not fit in 11 | |
2224 // bits, set result to NaN. 0x000 and 0x7FF are reserved exponent | |
2225 // values so detect them and set result to NaN. | |
2226 movl(rax,Address(rsp,0)); | |
2227 movl(rcx, -2048); // 11 bit mask and valid NaN binary encoding | |
2228 addl(rax, 1023); | |
2229 movl(rdx,rax); | |
2230 shll(rax,20); | |
2231 // Check that 0 < int(X)+1023 < 2047. Otherwise set rax to NaN. | |
2232 addl(rdx,1); | |
2233 // Check that 1 < int(X)+1023+1 < 2048 | |
2234 // in 3 steps: | |
2235 // 1- (int(X)+1023+1)&-2048 == 0 => 0 <= int(X)+1023+1 < 2048 | |
2236 // 2- (int(X)+1023+1)&-2048 != 0 | |
2237 // 3- (int(X)+1023+1)&-2048 != 1 | |
2238 // Do 2- first because addl just updated the flags. | |
2239 cmov32(Assembler::equal,rax,rcx); | |
2240 cmpl(rdx,1); | |
2241 cmov32(Assembler::equal,rax,rcx); | |
2242 testl(rdx,rcx); | |
2243 cmov32(Assembler::notEqual,rax,rcx); | |
2244 movl(Address(rsp,4),rax); | |
2245 movl(Address(rsp,0),0); | |
2246 fmul_d(Address(rsp,0)); // Stack: 2^X ... | |
2247 addptr(rsp,sizeof(jdouble)); | |
2248 } | |
2249 | |
2250 void MacroAssembler::increase_precision() { | |
2251 subptr(rsp, BytesPerWord); | |
2252 fnstcw(Address(rsp, 0)); | |
2253 movl(rax, Address(rsp, 0)); | |
2254 orl(rax, 0x300); | |
2255 push(rax); | |
2256 fldcw(Address(rsp, 0)); | |
2257 pop(rax); | |
2258 } | |
2259 | |
2260 void MacroAssembler::restore_precision() { | |
2261 fldcw(Address(rsp, 0)); | |
2262 addptr(rsp, BytesPerWord); | |
2263 } | |
2264 | |
2265 void MacroAssembler::fast_pow() { | |
2266 // computes X^Y = 2^(Y * log2(X)) | |
2267 // if fast computation is not possible, result is NaN. Requires | |
2268 // fallback from user of this macro. | |
2269 // increase precision for intermediate steps of the computation | |
2270 increase_precision(); | |
2271 fyl2x(); // Stack: (Y*log2(X)) ... | |
2272 pow_exp_core_encoding(); // Stack: exp(X) ... | |
2273 restore_precision(); | |
2274 } | |
2275 | |
2276 void MacroAssembler::fast_exp() { | |
2277 // computes exp(X) = 2^(X * log2(e)) | |
2278 // if fast computation is not possible, result is NaN. Requires | |
2279 // fallback from user of this macro. | |
2280 // increase precision for intermediate steps of the computation | |
2281 increase_precision(); | |
2282 fldl2e(); // Stack: log2(e) X ... | |
2283 fmulp(1); // Stack: (X*log2(e)) ... | |
2284 pow_exp_core_encoding(); // Stack: exp(X) ... | |
2285 restore_precision(); | |
2286 } | |
2287 | |
2288 void MacroAssembler::pow_or_exp(bool is_exp, int num_fpu_regs_in_use) { | |
2289 // kills rax, rcx, rdx | |
2290 // pow and exp needs 2 extra registers on the fpu stack. | |
2291 Label slow_case, done; | |
2292 Register tmp = noreg; | |
2293 if (!VM_Version::supports_cmov()) { | |
2294 // fcmp needs a temporary so preserve rdx, | |
2295 tmp = rdx; | |
2296 } | |
2297 Register tmp2 = rax; | |
2298 Register tmp3 = rcx; | |
2299 | |
2300 if (is_exp) { | |
2301 // Stack: X | |
2302 fld_s(0); // duplicate argument for runtime call. Stack: X X | |
2303 fast_exp(); // Stack: exp(X) X | |
2304 fcmp(tmp, 0, false, false); // Stack: exp(X) X | |
2305 // exp(X) not equal to itself: exp(X) is NaN go to slow case. | |
2306 jcc(Assembler::parity, slow_case); | |
2307 // get rid of duplicate argument. Stack: exp(X) | |
2308 if (num_fpu_regs_in_use > 0) { | |
2309 fxch(); | |
2310 fpop(); | |
2311 } else { | |
2312 ffree(1); | |
2313 } | |
2314 jmp(done); | |
2315 } else { | |
2316 // Stack: X Y | |
2317 Label x_negative, y_odd; | |
2318 | |
2319 fldz(); // Stack: 0 X Y | |
2320 fcmp(tmp, 1, true, false); // Stack: X Y | |
2321 jcc(Assembler::above, x_negative); | |
2322 | |
2323 // X >= 0 | |
2324 | |
2325 fld_s(1); // duplicate arguments for runtime call. Stack: Y X Y | |
2326 fld_s(1); // Stack: X Y X Y | |
2327 fast_pow(); // Stack: X^Y X Y | |
2328 fcmp(tmp, 0, false, false); // Stack: X^Y X Y | |
2329 // X^Y not equal to itself: X^Y is NaN go to slow case. | |
2330 jcc(Assembler::parity, slow_case); | |
2331 // get rid of duplicate arguments. Stack: X^Y | |
2332 if (num_fpu_regs_in_use > 0) { | |
2333 fxch(); fpop(); | |
2334 fxch(); fpop(); | |
2335 } else { | |
2336 ffree(2); | |
2337 ffree(1); | |
2338 } | |
2339 jmp(done); | |
2340 | |
2341 // X <= 0 | |
2342 bind(x_negative); | |
2343 | |
2344 fld_s(1); // Stack: Y X Y | |
2345 frndint(); // Stack: int(Y) X Y | |
2346 fcmp(tmp, 2, false, false); // Stack: int(Y) X Y | |
2347 jcc(Assembler::notEqual, slow_case); | |
2348 | |
2349 subptr(rsp, 8); | |
2350 | |
2351 // For X^Y, when X < 0, Y has to be an integer and the final | |
2352 // result depends on whether it's odd or even. We just checked | |
2353 // that int(Y) == Y. We move int(Y) to gp registers as a 64 bit | |
2354 // integer to test its parity. If int(Y) is huge and doesn't fit | |
2355 // in the 64 bit integer range, the integer indefinite value will | |
2356 // end up in the gp registers. Huge numbers are all even, the | |
2357 // integer indefinite number is even so it's fine. | |
2358 | |
2359 #ifdef ASSERT | |
2360 // Let's check we don't end up with an integer indefinite number | |
2361 // when not expected. First test for huge numbers: check whether | |
2362 // int(Y)+1 == int(Y) which is true for very large numbers and | |
2363 // those are all even. A 64 bit integer is guaranteed to not | |
2364 // overflow for numbers where y+1 != y (when precision is set to | |
2365 // double precision). | |
2366 Label y_not_huge; | |
2367 | |
2368 fld1(); // Stack: 1 int(Y) X Y | |
2369 fadd(1); // Stack: 1+int(Y) int(Y) X Y | |
2370 | |
2371 #ifdef _LP64 | |
2372 // trip to memory to force the precision down from double extended | |
2373 // precision | |
2374 fstp_d(Address(rsp, 0)); | |
2375 fld_d(Address(rsp, 0)); | |
2376 #endif | |
2377 | |
2378 fcmp(tmp, 1, true, false); // Stack: int(Y) X Y | |
2379 #endif | |
2380 | |
2381 // move int(Y) as 64 bit integer to thread's stack | |
2382 fistp_d(Address(rsp,0)); // Stack: X Y | |
2383 | |
2384 #ifdef ASSERT | |
2385 jcc(Assembler::notEqual, y_not_huge); | |
2386 | |
2387 // Y is huge so we know it's even. It may not fit in a 64 bit | |
2388 // integer and we don't want the debug code below to see the | |
2389 // integer indefinite value so overwrite int(Y) on the thread's | |
2390 // stack with 0. | |
2391 movl(Address(rsp, 0), 0); | |
2392 movl(Address(rsp, 4), 0); | |
2393 | |
2394 bind(y_not_huge); | |
2395 #endif | |
2396 | |
2397 fld_s(1); // duplicate arguments for runtime call. Stack: Y X Y | |
2398 fld_s(1); // Stack: X Y X Y | |
2399 fabs(); // Stack: abs(X) Y X Y | |
2400 fast_pow(); // Stack: abs(X)^Y X Y | |
2401 fcmp(tmp, 0, false, false); // Stack: abs(X)^Y X Y | |
2402 // abs(X)^Y not equal to itself: abs(X)^Y is NaN go to slow case. | |
2403 | |
2404 pop(tmp2); | |
2405 NOT_LP64(pop(tmp3)); | |
2406 jcc(Assembler::parity, slow_case); | |
2407 | |
2408 #ifdef ASSERT | |
2409 // Check that int(Y) is not integer indefinite value (int | |
2410 // overflow). Shouldn't happen because for values that would | |
2411 // overflow, 1+int(Y)==Y which was tested earlier. | |
2412 #ifndef _LP64 | |
2413 { | |
2414 Label integer; | |
2415 testl(tmp2, tmp2); | |
2416 jcc(Assembler::notZero, integer); | |
2417 cmpl(tmp3, 0x80000000); | |
2418 jcc(Assembler::notZero, integer); | |
2419 STOP("integer indefinite value shouldn't be seen here"); | |
2420 bind(integer); | |
2421 } | |
2422 #else | |
2423 { | |
2424 Label integer; | |
2425 mov(tmp3, tmp2); // preserve tmp2 for parity check below | |
2426 shlq(tmp3, 1); | |
2427 jcc(Assembler::carryClear, integer); | |
2428 jcc(Assembler::notZero, integer); | |
2429 STOP("integer indefinite value shouldn't be seen here"); | |
2430 bind(integer); | |
2431 } | |
2432 #endif | |
2433 #endif | |
2434 | |
2435 // get rid of duplicate arguments. Stack: X^Y | |
2436 if (num_fpu_regs_in_use > 0) { | |
2437 fxch(); fpop(); | |
2438 fxch(); fpop(); | |
2439 } else { | |
2440 ffree(2); | |
2441 ffree(1); | |
2442 } | |
2443 | |
2444 testl(tmp2, 1); | |
2445 jcc(Assembler::zero, done); // X <= 0, Y even: X^Y = abs(X)^Y | |
2446 // X <= 0, Y even: X^Y = -abs(X)^Y | |
2447 | |
2448 fchs(); // Stack: -abs(X)^Y Y | |
2449 jmp(done); | |
2450 } | |
2451 | |
2452 // slow case: runtime call | |
2453 bind(slow_case); | |
2454 | |
2455 fpop(); // pop incorrect result or int(Y) | |
2456 | |
2457 fp_runtime_fallback(is_exp ? CAST_FROM_FN_PTR(address, SharedRuntime::dexp) : CAST_FROM_FN_PTR(address, SharedRuntime::dpow), | |
2458 is_exp ? 1 : 2, num_fpu_regs_in_use); | |
2459 | |
2460 // Come here with result in F-TOS | |
2461 bind(done); | |
2462 } | |
2463 | |
2464 void MacroAssembler::fpop() { | |
2465 ffree(); | |
2466 fincstp(); | |
2467 } | |
2468 | |
2469 void MacroAssembler::fremr(Register tmp) { | |
2470 save_rax(tmp); | |
2471 { Label L; | |
2472 bind(L); | |
2473 fprem(); | |
2474 fwait(); fnstsw_ax(); | |
2475 #ifdef _LP64 | |
2476 testl(rax, 0x400); | |
2477 jcc(Assembler::notEqual, L); | |
2478 #else | |
2479 sahf(); | |
2480 jcc(Assembler::parity, L); | |
2481 #endif // _LP64 | |
2482 } | |
2483 restore_rax(tmp); | |
2484 // Result is in ST0. | |
2485 // Note: fxch & fpop to get rid of ST1 | |
2486 // (otherwise FPU stack could overflow eventually) | |
2487 fxch(1); | |
2488 fpop(); | |
2489 } | |
2490 | |
2491 | |
2492 void MacroAssembler::incrementl(AddressLiteral dst) { | |
2493 if (reachable(dst)) { | |
2494 incrementl(as_Address(dst)); | |
2495 } else { | |
2496 lea(rscratch1, dst); | |
2497 incrementl(Address(rscratch1, 0)); | |
2498 } | |
2499 } | |
2500 | |
2501 void MacroAssembler::incrementl(ArrayAddress dst) { | |
2502 incrementl(as_Address(dst)); | |
2503 } | |
2504 | |
2505 void MacroAssembler::incrementl(Register reg, int value) { | |
2506 if (value == min_jint) {addl(reg, value) ; return; } | |
2507 if (value < 0) { decrementl(reg, -value); return; } | |
2508 if (value == 0) { ; return; } | |
2509 if (value == 1 && UseIncDec) { incl(reg) ; return; } | |
2510 /* else */ { addl(reg, value) ; return; } | |
2511 } | |
2512 | |
2513 void MacroAssembler::incrementl(Address dst, int value) { | |
2514 if (value == min_jint) {addl(dst, value) ; return; } | |
2515 if (value < 0) { decrementl(dst, -value); return; } | |
2516 if (value == 0) { ; return; } | |
2517 if (value == 1 && UseIncDec) { incl(dst) ; return; } | |
2518 /* else */ { addl(dst, value) ; return; } | |
2519 } | |
2520 | |
2521 void MacroAssembler::jump(AddressLiteral dst) { | |
2522 if (reachable(dst)) { | |
2523 jmp_literal(dst.target(), dst.rspec()); | |
2524 } else { | |
2525 lea(rscratch1, dst); | |
2526 jmp(rscratch1); | |
2527 } | |
2528 } | |
2529 | |
2530 void MacroAssembler::jump_cc(Condition cc, AddressLiteral dst) { | |
2531 if (reachable(dst)) { | |
2532 InstructionMark im(this); | |
2533 relocate(dst.reloc()); | |
2534 const int short_size = 2; | |
2535 const int long_size = 6; | |
2536 int offs = (intptr_t)dst.target() - ((intptr_t)pc()); | |
2537 if (dst.reloc() == relocInfo::none && is8bit(offs - short_size)) { | |
2538 // 0111 tttn #8-bit disp | |
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2539 emit_int8(0x70 | cc); |
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2540 emit_int8((offs - short_size) & 0xFF); |
7199 | 2541 } else { |
2542 // 0000 1111 1000 tttn #32-bit disp | |
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2543 emit_int8(0x0F); |
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2544 emit_int8((unsigned char)(0x80 | cc)); |
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2545 emit_int32(offs - long_size); |
7199 | 2546 } |
2547 } else { | |
2548 #ifdef ASSERT | |
2549 warning("reversing conditional branch"); | |
2550 #endif /* ASSERT */ | |
2551 Label skip; | |
2552 jccb(reverse[cc], skip); | |
2553 lea(rscratch1, dst); | |
2554 Assembler::jmp(rscratch1); | |
2555 bind(skip); | |
2556 } | |
2557 } | |
2558 | |
2559 void MacroAssembler::ldmxcsr(AddressLiteral src) { | |
2560 if (reachable(src)) { | |
2561 Assembler::ldmxcsr(as_Address(src)); | |
2562 } else { | |
2563 lea(rscratch1, src); | |
2564 Assembler::ldmxcsr(Address(rscratch1, 0)); | |
2565 } | |
2566 } | |
2567 | |
2568 int MacroAssembler::load_signed_byte(Register dst, Address src) { | |
2569 int off; | |
2570 if (LP64_ONLY(true ||) VM_Version::is_P6()) { | |
2571 off = offset(); | |
2572 movsbl(dst, src); // movsxb | |
2573 } else { | |
2574 off = load_unsigned_byte(dst, src); | |
2575 shll(dst, 24); | |
2576 sarl(dst, 24); | |
2577 } | |
2578 return off; | |
2579 } | |
2580 | |
2581 // Note: load_signed_short used to be called load_signed_word. | |
2582 // Although the 'w' in x86 opcodes refers to the term "word" in the assembler | |
2583 // manual, which means 16 bits, that usage is found nowhere in HotSpot code. | |
2584 // The term "word" in HotSpot means a 32- or 64-bit machine word. | |
2585 int MacroAssembler::load_signed_short(Register dst, Address src) { | |
2586 int off; | |
2587 if (LP64_ONLY(true ||) VM_Version::is_P6()) { | |
2588 // This is dubious to me since it seems safe to do a signed 16 => 64 bit | |
2589 // version but this is what 64bit has always done. This seems to imply | |
2590 // that users are only using 32bits worth. | |
2591 off = offset(); | |
2592 movswl(dst, src); // movsxw | |
2593 } else { | |
2594 off = load_unsigned_short(dst, src); | |
2595 shll(dst, 16); | |
2596 sarl(dst, 16); | |
2597 } | |
2598 return off; | |
2599 } | |
2600 | |
2601 int MacroAssembler::load_unsigned_byte(Register dst, Address src) { | |
2602 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16, | |
2603 // and "3.9 Partial Register Penalties", p. 22). | |
2604 int off; | |
2605 if (LP64_ONLY(true || ) VM_Version::is_P6() || src.uses(dst)) { | |
2606 off = offset(); | |
2607 movzbl(dst, src); // movzxb | |
2608 } else { | |
2609 xorl(dst, dst); | |
2610 off = offset(); | |
2611 movb(dst, src); | |
2612 } | |
2613 return off; | |
2614 } | |
2615 | |
2616 // Note: load_unsigned_short used to be called load_unsigned_word. | |
2617 int MacroAssembler::load_unsigned_short(Register dst, Address src) { | |
2618 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16, | |
2619 // and "3.9 Partial Register Penalties", p. 22). | |
2620 int off; | |
2621 if (LP64_ONLY(true ||) VM_Version::is_P6() || src.uses(dst)) { | |
2622 off = offset(); | |
2623 movzwl(dst, src); // movzxw | |
2624 } else { | |
2625 xorl(dst, dst); | |
2626 off = offset(); | |
2627 movw(dst, src); | |
2628 } | |
2629 return off; | |
2630 } | |
2631 | |
2632 void MacroAssembler::load_sized_value(Register dst, Address src, size_t size_in_bytes, bool is_signed, Register dst2) { | |
2633 switch (size_in_bytes) { | |
2634 #ifndef _LP64 | |
2635 case 8: | |
2636 assert(dst2 != noreg, "second dest register required"); | |
2637 movl(dst, src); | |
2638 movl(dst2, src.plus_disp(BytesPerInt)); | |
2639 break; | |
2640 #else | |
2641 case 8: movq(dst, src); break; | |
2642 #endif | |
2643 case 4: movl(dst, src); break; | |
2644 case 2: is_signed ? load_signed_short(dst, src) : load_unsigned_short(dst, src); break; | |
2645 case 1: is_signed ? load_signed_byte( dst, src) : load_unsigned_byte( dst, src); break; | |
2646 default: ShouldNotReachHere(); | |
2647 } | |
2648 } | |
2649 | |
2650 void MacroAssembler::store_sized_value(Address dst, Register src, size_t size_in_bytes, Register src2) { | |
2651 switch (size_in_bytes) { | |
2652 #ifndef _LP64 | |
2653 case 8: | |
2654 assert(src2 != noreg, "second source register required"); | |
2655 movl(dst, src); | |
2656 movl(dst.plus_disp(BytesPerInt), src2); | |
2657 break; | |
2658 #else | |
2659 case 8: movq(dst, src); break; | |
2660 #endif | |
2661 case 4: movl(dst, src); break; | |
2662 case 2: movw(dst, src); break; | |
2663 case 1: movb(dst, src); break; | |
2664 default: ShouldNotReachHere(); | |
2665 } | |
2666 } | |
2667 | |
2668 void MacroAssembler::mov32(AddressLiteral dst, Register src) { | |
2669 if (reachable(dst)) { | |
2670 movl(as_Address(dst), src); | |
2671 } else { | |
2672 lea(rscratch1, dst); | |
2673 movl(Address(rscratch1, 0), src); | |
2674 } | |
2675 } | |
2676 | |
2677 void MacroAssembler::mov32(Register dst, AddressLiteral src) { | |
2678 if (reachable(src)) { | |
2679 movl(dst, as_Address(src)); | |
2680 } else { | |
2681 lea(rscratch1, src); | |
2682 movl(dst, Address(rscratch1, 0)); | |
2683 } | |
2684 } | |
2685 | |
2686 // C++ bool manipulation | |
2687 | |
2688 void MacroAssembler::movbool(Register dst, Address src) { | |
2689 if(sizeof(bool) == 1) | |
2690 movb(dst, src); | |
2691 else if(sizeof(bool) == 2) | |
2692 movw(dst, src); | |
2693 else if(sizeof(bool) == 4) | |
2694 movl(dst, src); | |
2695 else | |
2696 // unsupported | |
2697 ShouldNotReachHere(); | |
2698 } | |
2699 | |
2700 void MacroAssembler::movbool(Address dst, bool boolconst) { | |
2701 if(sizeof(bool) == 1) | |
2702 movb(dst, (int) boolconst); | |
2703 else if(sizeof(bool) == 2) | |
2704 movw(dst, (int) boolconst); | |
2705 else if(sizeof(bool) == 4) | |
2706 movl(dst, (int) boolconst); | |
2707 else | |
2708 // unsupported | |
2709 ShouldNotReachHere(); | |
2710 } | |
2711 | |
2712 void MacroAssembler::movbool(Address dst, Register src) { | |
2713 if(sizeof(bool) == 1) | |
2714 movb(dst, src); | |
2715 else if(sizeof(bool) == 2) | |
2716 movw(dst, src); | |
2717 else if(sizeof(bool) == 4) | |
2718 movl(dst, src); | |
2719 else | |
2720 // unsupported | |
2721 ShouldNotReachHere(); | |
2722 } | |
2723 | |
2724 void MacroAssembler::movbyte(ArrayAddress dst, int src) { | |
2725 movb(as_Address(dst), src); | |
2726 } | |
2727 | |
2728 void MacroAssembler::movdl(XMMRegister dst, AddressLiteral src) { | |
2729 if (reachable(src)) { | |
2730 movdl(dst, as_Address(src)); | |
2731 } else { | |
2732 lea(rscratch1, src); | |
2733 movdl(dst, Address(rscratch1, 0)); | |
2734 } | |
2735 } | |
2736 | |
2737 void MacroAssembler::movq(XMMRegister dst, AddressLiteral src) { | |
2738 if (reachable(src)) { | |
2739 movq(dst, as_Address(src)); | |
2740 } else { | |
2741 lea(rscratch1, src); | |
2742 movq(dst, Address(rscratch1, 0)); | |
2743 } | |
2744 } | |
2745 | |
2746 void MacroAssembler::movdbl(XMMRegister dst, AddressLiteral src) { | |
2747 if (reachable(src)) { | |
2748 if (UseXmmLoadAndClearUpper) { | |
2749 movsd (dst, as_Address(src)); | |
2750 } else { | |
2751 movlpd(dst, as_Address(src)); | |
2752 } | |
2753 } else { | |
2754 lea(rscratch1, src); | |
2755 if (UseXmmLoadAndClearUpper) { | |
2756 movsd (dst, Address(rscratch1, 0)); | |
2757 } else { | |
2758 movlpd(dst, Address(rscratch1, 0)); | |
2759 } | |
2760 } | |
2761 } | |
2762 | |
2763 void MacroAssembler::movflt(XMMRegister dst, AddressLiteral src) { | |
2764 if (reachable(src)) { | |
2765 movss(dst, as_Address(src)); | |
2766 } else { | |
2767 lea(rscratch1, src); | |
2768 movss(dst, Address(rscratch1, 0)); | |
2769 } | |
2770 } | |
2771 | |
2772 void MacroAssembler::movptr(Register dst, Register src) { | |
2773 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); | |
2774 } | |
2775 | |
2776 void MacroAssembler::movptr(Register dst, Address src) { | |
2777 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); | |
2778 } | |
2779 | |
2780 // src should NEVER be a real pointer. Use AddressLiteral for true pointers | |
2781 void MacroAssembler::movptr(Register dst, intptr_t src) { | |
2782 LP64_ONLY(mov64(dst, src)) NOT_LP64(movl(dst, src)); | |
2783 } | |
2784 | |
2785 void MacroAssembler::movptr(Address dst, Register src) { | |
2786 LP64_ONLY(movq(dst, src)) NOT_LP64(movl(dst, src)); | |
2787 } | |
2788 | |
2789 void MacroAssembler::movdqu(XMMRegister dst, AddressLiteral src) { | |
2790 if (reachable(src)) { | |
2791 Assembler::movdqu(dst, as_Address(src)); | |
2792 } else { | |
2793 lea(rscratch1, src); | |
2794 Assembler::movdqu(dst, Address(rscratch1, 0)); | |
2795 } | |
2796 } | |
2797 | |
11080
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2798 void MacroAssembler::movdqa(XMMRegister dst, AddressLiteral src) { |
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2799 if (reachable(src)) { |
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2800 Assembler::movdqa(dst, as_Address(src)); |
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2801 } else { |
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2802 lea(rscratch1, src); |
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2803 Assembler::movdqa(dst, Address(rscratch1, 0)); |
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2804 } |
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|
2805 } |
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2806 |
7199 | 2807 void MacroAssembler::movsd(XMMRegister dst, AddressLiteral src) { |
2808 if (reachable(src)) { | |
2809 Assembler::movsd(dst, as_Address(src)); | |
2810 } else { | |
2811 lea(rscratch1, src); | |
2812 Assembler::movsd(dst, Address(rscratch1, 0)); | |
2813 } | |
2814 } | |
2815 | |
2816 void MacroAssembler::movss(XMMRegister dst, AddressLiteral src) { | |
2817 if (reachable(src)) { | |
2818 Assembler::movss(dst, as_Address(src)); | |
2819 } else { | |
2820 lea(rscratch1, src); | |
2821 Assembler::movss(dst, Address(rscratch1, 0)); | |
2822 } | |
2823 } | |
2824 | |
2825 void MacroAssembler::mulsd(XMMRegister dst, AddressLiteral src) { | |
2826 if (reachable(src)) { | |
2827 Assembler::mulsd(dst, as_Address(src)); | |
2828 } else { | |
2829 lea(rscratch1, src); | |
2830 Assembler::mulsd(dst, Address(rscratch1, 0)); | |
2831 } | |
2832 } | |
2833 | |
2834 void MacroAssembler::mulss(XMMRegister dst, AddressLiteral src) { | |
2835 if (reachable(src)) { | |
2836 Assembler::mulss(dst, as_Address(src)); | |
2837 } else { | |
2838 lea(rscratch1, src); | |
2839 Assembler::mulss(dst, Address(rscratch1, 0)); | |
2840 } | |
2841 } | |
2842 | |
2843 void MacroAssembler::null_check(Register reg, int offset) { | |
2844 if (needs_explicit_null_check(offset)) { | |
2845 // provoke OS NULL exception if reg = NULL by | |
2846 // accessing M[reg] w/o changing any (non-CC) registers | |
2847 // NOTE: cmpl is plenty here to provoke a segv | |
2848 cmpptr(rax, Address(reg, 0)); | |
2849 // Note: should probably use testl(rax, Address(reg, 0)); | |
2850 // may be shorter code (however, this version of | |
2851 // testl needs to be implemented first) | |
2852 } else { | |
2853 // nothing to do, (later) access of M[reg + offset] | |
2854 // will provoke OS NULL exception if reg = NULL | |
2855 } | |
2856 } | |
2857 | |
2858 void MacroAssembler::os_breakpoint() { | |
2859 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability | |
2860 // (e.g., MSVC can't call ps() otherwise) | |
2861 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint))); | |
2862 } | |
2863 | |
2864 void MacroAssembler::pop_CPU_state() { | |
2865 pop_FPU_state(); | |
2866 pop_IU_state(); | |
2867 } | |
2868 | |
2869 void MacroAssembler::pop_FPU_state() { | |
2870 NOT_LP64(frstor(Address(rsp, 0));) | |
2871 LP64_ONLY(fxrstor(Address(rsp, 0));) | |
2872 addptr(rsp, FPUStateSizeInWords * wordSize); | |
2873 } | |
2874 | |
2875 void MacroAssembler::pop_IU_state() { | |
2876 popa(); | |
2877 LP64_ONLY(addq(rsp, 8)); | |
2878 popf(); | |
2879 } | |
2880 | |
2881 // Save Integer and Float state | |
2882 // Warning: Stack must be 16 byte aligned (64bit) | |
2883 void MacroAssembler::push_CPU_state() { | |
2884 push_IU_state(); | |
2885 push_FPU_state(); | |
2886 } | |
2887 | |
2888 void MacroAssembler::push_FPU_state() { | |
2889 subptr(rsp, FPUStateSizeInWords * wordSize); | |
2890 #ifndef _LP64 | |
2891 fnsave(Address(rsp, 0)); | |
2892 fwait(); | |
2893 #else | |
2894 fxsave(Address(rsp, 0)); | |
2895 #endif // LP64 | |
2896 } | |
2897 | |
2898 void MacroAssembler::push_IU_state() { | |
2899 // Push flags first because pusha kills them | |
2900 pushf(); | |
2901 // Make sure rsp stays 16-byte aligned | |
2902 LP64_ONLY(subq(rsp, 8)); | |
2903 pusha(); | |
2904 } | |
2905 | |
2906 void MacroAssembler::reset_last_Java_frame(Register java_thread, bool clear_fp, bool clear_pc) { | |
2907 // determine java_thread register | |
2908 if (!java_thread->is_valid()) { | |
2909 java_thread = rdi; | |
2910 get_thread(java_thread); | |
2911 } | |
2912 // we must set sp to zero to clear frame | |
2913 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), NULL_WORD); | |
2914 if (clear_fp) { | |
2915 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), NULL_WORD); | |
2916 } | |
2917 | |
2918 if (clear_pc) | |
2919 movptr(Address(java_thread, JavaThread::last_Java_pc_offset()), NULL_WORD); | |
2920 | |
2921 } | |
2922 | |
2923 void MacroAssembler::restore_rax(Register tmp) { | |
2924 if (tmp == noreg) pop(rax); | |
2925 else if (tmp != rax) mov(rax, tmp); | |
2926 } | |
2927 | |
2928 void MacroAssembler::round_to(Register reg, int modulus) { | |
2929 addptr(reg, modulus - 1); | |
2930 andptr(reg, -modulus); | |
2931 } | |
2932 | |
2933 void MacroAssembler::save_rax(Register tmp) { | |
2934 if (tmp == noreg) push(rax); | |
2935 else if (tmp != rax) mov(tmp, rax); | |
2936 } | |
2937 | |
2938 // Write serialization page so VM thread can do a pseudo remote membar. | |
2939 // We use the current thread pointer to calculate a thread specific | |
2940 // offset to write to within the page. This minimizes bus traffic | |
2941 // due to cache line collision. | |
2942 void MacroAssembler::serialize_memory(Register thread, Register tmp) { | |
2943 movl(tmp, thread); | |
2944 shrl(tmp, os::get_serialize_page_shift_count()); | |
2945 andl(tmp, (os::vm_page_size() - sizeof(int))); | |
2946 | |
2947 Address index(noreg, tmp, Address::times_1); | |
2948 ExternalAddress page(os::get_memory_serialize_page()); | |
2949 | |
2950 // Size of store must match masking code above | |
2951 movl(as_Address(ArrayAddress(page, index)), tmp); | |
2952 } | |
2953 | |
2954 // Calls to C land | |
2955 // | |
2956 // When entering C land, the rbp, & rsp of the last Java frame have to be recorded | |
2957 // in the (thread-local) JavaThread object. When leaving C land, the last Java fp | |
2958 // has to be reset to 0. This is required to allow proper stack traversal. | |
2959 void MacroAssembler::set_last_Java_frame(Register java_thread, | |
2960 Register last_java_sp, | |
2961 Register last_java_fp, | |
2962 address last_java_pc) { | |
2963 // determine java_thread register | |
2964 if (!java_thread->is_valid()) { | |
2965 java_thread = rdi; | |
2966 get_thread(java_thread); | |
2967 } | |
2968 // determine last_java_sp register | |
2969 if (!last_java_sp->is_valid()) { | |
2970 last_java_sp = rsp; | |
2971 } | |
2972 | |
2973 // last_java_fp is optional | |
2974 | |
2975 if (last_java_fp->is_valid()) { | |
2976 movptr(Address(java_thread, JavaThread::last_Java_fp_offset()), last_java_fp); | |
2977 } | |
2978 | |
2979 // last_java_pc is optional | |
2980 | |
2981 if (last_java_pc != NULL) { | |
2982 lea(Address(java_thread, | |
2983 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()), | |
2984 InternalAddress(last_java_pc)); | |
2985 | |
2986 } | |
2987 movptr(Address(java_thread, JavaThread::last_Java_sp_offset()), last_java_sp); | |
2988 } | |
2989 | |
2990 void MacroAssembler::shlptr(Register dst, int imm8) { | |
2991 LP64_ONLY(shlq(dst, imm8)) NOT_LP64(shll(dst, imm8)); | |
2992 } | |
2993 | |
2994 void MacroAssembler::shrptr(Register dst, int imm8) { | |
2995 LP64_ONLY(shrq(dst, imm8)) NOT_LP64(shrl(dst, imm8)); | |
2996 } | |
2997 | |
2998 void MacroAssembler::sign_extend_byte(Register reg) { | |
2999 if (LP64_ONLY(true ||) (VM_Version::is_P6() && reg->has_byte_register())) { | |
3000 movsbl(reg, reg); // movsxb | |
3001 } else { | |
3002 shll(reg, 24); | |
3003 sarl(reg, 24); | |
3004 } | |
3005 } | |
3006 | |
3007 void MacroAssembler::sign_extend_short(Register reg) { | |
3008 if (LP64_ONLY(true ||) VM_Version::is_P6()) { | |
3009 movswl(reg, reg); // movsxw | |
3010 } else { | |
3011 shll(reg, 16); | |
3012 sarl(reg, 16); | |
3013 } | |
3014 } | |
3015 | |
3016 void MacroAssembler::testl(Register dst, AddressLiteral src) { | |
3017 assert(reachable(src), "Address should be reachable"); | |
3018 testl(dst, as_Address(src)); | |
3019 } | |
3020 | |
3021 void MacroAssembler::sqrtsd(XMMRegister dst, AddressLiteral src) { | |
3022 if (reachable(src)) { | |
3023 Assembler::sqrtsd(dst, as_Address(src)); | |
3024 } else { | |
3025 lea(rscratch1, src); | |
3026 Assembler::sqrtsd(dst, Address(rscratch1, 0)); | |
3027 } | |
3028 } | |
3029 | |
3030 void MacroAssembler::sqrtss(XMMRegister dst, AddressLiteral src) { | |
3031 if (reachable(src)) { | |
3032 Assembler::sqrtss(dst, as_Address(src)); | |
3033 } else { | |
3034 lea(rscratch1, src); | |
3035 Assembler::sqrtss(dst, Address(rscratch1, 0)); | |
3036 } | |
3037 } | |
3038 | |
3039 void MacroAssembler::subsd(XMMRegister dst, AddressLiteral src) { | |
3040 if (reachable(src)) { | |
3041 Assembler::subsd(dst, as_Address(src)); | |
3042 } else { | |
3043 lea(rscratch1, src); | |
3044 Assembler::subsd(dst, Address(rscratch1, 0)); | |
3045 } | |
3046 } | |
3047 | |
3048 void MacroAssembler::subss(XMMRegister dst, AddressLiteral src) { | |
3049 if (reachable(src)) { | |
3050 Assembler::subss(dst, as_Address(src)); | |
3051 } else { | |
3052 lea(rscratch1, src); | |
3053 Assembler::subss(dst, Address(rscratch1, 0)); | |
3054 } | |
3055 } | |
3056 | |
3057 void MacroAssembler::ucomisd(XMMRegister dst, AddressLiteral src) { | |
3058 if (reachable(src)) { | |
3059 Assembler::ucomisd(dst, as_Address(src)); | |
3060 } else { | |
3061 lea(rscratch1, src); | |
3062 Assembler::ucomisd(dst, Address(rscratch1, 0)); | |
3063 } | |
3064 } | |
3065 | |
3066 void MacroAssembler::ucomiss(XMMRegister dst, AddressLiteral src) { | |
3067 if (reachable(src)) { | |
3068 Assembler::ucomiss(dst, as_Address(src)); | |
3069 } else { | |
3070 lea(rscratch1, src); | |
3071 Assembler::ucomiss(dst, Address(rscratch1, 0)); | |
3072 } | |
3073 } | |
3074 | |
3075 void MacroAssembler::xorpd(XMMRegister dst, AddressLiteral src) { | |
3076 // Used in sign-bit flipping with aligned address. | |
3077 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); | |
3078 if (reachable(src)) { | |
3079 Assembler::xorpd(dst, as_Address(src)); | |
3080 } else { | |
3081 lea(rscratch1, src); | |
3082 Assembler::xorpd(dst, Address(rscratch1, 0)); | |
3083 } | |
3084 } | |
3085 | |
3086 void MacroAssembler::xorps(XMMRegister dst, AddressLiteral src) { | |
3087 // Used in sign-bit flipping with aligned address. | |
3088 assert((UseAVX > 0) || (((intptr_t)src.target() & 15) == 0), "SSE mode requires address alignment 16 bytes"); | |
3089 if (reachable(src)) { | |
3090 Assembler::xorps(dst, as_Address(src)); | |
3091 } else { | |
3092 lea(rscratch1, src); | |
3093 Assembler::xorps(dst, Address(rscratch1, 0)); | |
3094 } | |
3095 } | |
3096 | |
3097 void MacroAssembler::pshufb(XMMRegister dst, AddressLiteral src) { | |
3098 // Used in sign-bit flipping with aligned address. | |
7427 | 3099 bool aligned_adr = (((intptr_t)src.target() & 15) == 0); |
3100 assert((UseAVX > 0) || aligned_adr, "SSE mode requires address alignment 16 bytes"); | |
7199 | 3101 if (reachable(src)) { |
3102 Assembler::pshufb(dst, as_Address(src)); | |
3103 } else { | |
3104 lea(rscratch1, src); | |
3105 Assembler::pshufb(dst, Address(rscratch1, 0)); | |
3106 } | |
3107 } | |
3108 | |
3109 // AVX 3-operands instructions | |
3110 | |
3111 void MacroAssembler::vaddsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
3112 if (reachable(src)) { | |
3113 vaddsd(dst, nds, as_Address(src)); | |
3114 } else { | |
3115 lea(rscratch1, src); | |
3116 vaddsd(dst, nds, Address(rscratch1, 0)); | |
3117 } | |
3118 } | |
3119 | |
3120 void MacroAssembler::vaddss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
3121 if (reachable(src)) { | |
3122 vaddss(dst, nds, as_Address(src)); | |
3123 } else { | |
3124 lea(rscratch1, src); | |
3125 vaddss(dst, nds, Address(rscratch1, 0)); | |
3126 } | |
3127 } | |
3128 | |
3129 void MacroAssembler::vandpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256) { | |
3130 if (reachable(src)) { | |
3131 vandpd(dst, nds, as_Address(src), vector256); | |
3132 } else { | |
3133 lea(rscratch1, src); | |
3134 vandpd(dst, nds, Address(rscratch1, 0), vector256); | |
3135 } | |
3136 } | |
3137 | |
3138 void MacroAssembler::vandps(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256) { | |
3139 if (reachable(src)) { | |
3140 vandps(dst, nds, as_Address(src), vector256); | |
3141 } else { | |
3142 lea(rscratch1, src); | |
3143 vandps(dst, nds, Address(rscratch1, 0), vector256); | |
3144 } | |
3145 } | |
3146 | |
3147 void MacroAssembler::vdivsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
3148 if (reachable(src)) { | |
3149 vdivsd(dst, nds, as_Address(src)); | |
3150 } else { | |
3151 lea(rscratch1, src); | |
3152 vdivsd(dst, nds, Address(rscratch1, 0)); | |
3153 } | |
3154 } | |
3155 | |
3156 void MacroAssembler::vdivss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
3157 if (reachable(src)) { | |
3158 vdivss(dst, nds, as_Address(src)); | |
3159 } else { | |
3160 lea(rscratch1, src); | |
3161 vdivss(dst, nds, Address(rscratch1, 0)); | |
3162 } | |
3163 } | |
3164 | |
3165 void MacroAssembler::vmulsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
3166 if (reachable(src)) { | |
3167 vmulsd(dst, nds, as_Address(src)); | |
3168 } else { | |
3169 lea(rscratch1, src); | |
3170 vmulsd(dst, nds, Address(rscratch1, 0)); | |
3171 } | |
3172 } | |
3173 | |
3174 void MacroAssembler::vmulss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
3175 if (reachable(src)) { | |
3176 vmulss(dst, nds, as_Address(src)); | |
3177 } else { | |
3178 lea(rscratch1, src); | |
3179 vmulss(dst, nds, Address(rscratch1, 0)); | |
3180 } | |
3181 } | |
3182 | |
3183 void MacroAssembler::vsubsd(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
3184 if (reachable(src)) { | |
3185 vsubsd(dst, nds, as_Address(src)); | |
3186 } else { | |
3187 lea(rscratch1, src); | |
3188 vsubsd(dst, nds, Address(rscratch1, 0)); | |
3189 } | |
3190 } | |
3191 | |
3192 void MacroAssembler::vsubss(XMMRegister dst, XMMRegister nds, AddressLiteral src) { | |
3193 if (reachable(src)) { | |
3194 vsubss(dst, nds, as_Address(src)); | |
3195 } else { | |
3196 lea(rscratch1, src); | |
3197 vsubss(dst, nds, Address(rscratch1, 0)); | |
3198 } | |
3199 } | |
3200 | |
3201 void MacroAssembler::vxorpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256) { | |
3202 if (reachable(src)) { | |
3203 vxorpd(dst, nds, as_Address(src), vector256); | |
3204 } else { | |
3205 lea(rscratch1, src); | |
3206 vxorpd(dst, nds, Address(rscratch1, 0), vector256); | |
3207 } | |
3208 } | |
3209 | |
3210 void MacroAssembler::vxorps(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256) { | |
3211 if (reachable(src)) { | |
3212 vxorps(dst, nds, as_Address(src), vector256); | |
3213 } else { | |
3214 lea(rscratch1, src); | |
3215 vxorps(dst, nds, Address(rscratch1, 0), vector256); | |
3216 } | |
3217 } | |
3218 | |
3219 | |
3220 ////////////////////////////////////////////////////////////////////////////////// | |
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db9981fd3124
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7477
diff
changeset
|
3221 #if INCLUDE_ALL_GCS |
7199 | 3222 |
3223 void MacroAssembler::g1_write_barrier_pre(Register obj, | |
3224 Register pre_val, | |
3225 Register thread, | |
3226 Register tmp, | |
3227 bool tosca_live, | |
3228 bool expand_call) { | |
3229 | |
3230 // If expand_call is true then we expand the call_VM_leaf macro | |
3231 // directly to skip generating the check by | |
3232 // InterpreterMacroAssembler::call_VM_leaf_base that checks _last_sp. | |
3233 | |
3234 #ifdef _LP64 | |
3235 assert(thread == r15_thread, "must be"); | |
3236 #endif // _LP64 | |
3237 | |
3238 Label done; | |
3239 Label runtime; | |
3240 | |
3241 assert(pre_val != noreg, "check this code"); | |
3242 | |
3243 if (obj != noreg) { | |
3244 assert_different_registers(obj, pre_val, tmp); | |
3245 assert(pre_val != rax, "check this code"); | |
3246 } | |
3247 | |
3248 Address in_progress(thread, in_bytes(JavaThread::satb_mark_queue_offset() + | |
3249 PtrQueue::byte_offset_of_active())); | |
3250 Address index(thread, in_bytes(JavaThread::satb_mark_queue_offset() + | |
3251 PtrQueue::byte_offset_of_index())); | |
3252 Address buffer(thread, in_bytes(JavaThread::satb_mark_queue_offset() + | |
3253 PtrQueue::byte_offset_of_buf())); | |
3254 | |
3255 | |
3256 // Is marking active? | |
3257 if (in_bytes(PtrQueue::byte_width_of_active()) == 4) { | |
3258 cmpl(in_progress, 0); | |
3259 } else { | |
3260 assert(in_bytes(PtrQueue::byte_width_of_active()) == 1, "Assumption"); | |
3261 cmpb(in_progress, 0); | |
3262 } | |
3263 jcc(Assembler::equal, done); | |
3264 | |
3265 // Do we need to load the previous value? | |
3266 if (obj != noreg) { | |
3267 load_heap_oop(pre_val, Address(obj, 0)); | |
3268 } | |
3269 | |
3270 // Is the previous value null? | |
3271 cmpptr(pre_val, (int32_t) NULL_WORD); | |
3272 jcc(Assembler::equal, done); | |
3273 | |
3274 // Can we store original value in the thread's buffer? | |
3275 // Is index == 0? | |
3276 // (The index field is typed as size_t.) | |
3277 | |
3278 movptr(tmp, index); // tmp := *index_adr | |
3279 cmpptr(tmp, 0); // tmp == 0? | |
3280 jcc(Assembler::equal, runtime); // If yes, goto runtime | |
3281 | |
3282 subptr(tmp, wordSize); // tmp := tmp - wordSize | |
3283 movptr(index, tmp); // *index_adr := tmp | |
3284 addptr(tmp, buffer); // tmp := tmp + *buffer_adr | |
3285 | |
3286 // Record the previous value | |
3287 movptr(Address(tmp, 0), pre_val); | |
3288 jmp(done); | |
3289 | |
3290 bind(runtime); | |
3291 // save the live input values | |
3292 if(tosca_live) push(rax); | |
3293 | |
3294 if (obj != noreg && obj != rax) | |
3295 push(obj); | |
3296 | |
3297 if (pre_val != rax) | |
3298 push(pre_val); | |
3299 | |
3300 // Calling the runtime using the regular call_VM_leaf mechanism generates | |
3301 // code (generated by InterpreterMacroAssember::call_VM_leaf_base) | |
3302 // that checks that the *(ebp+frame::interpreter_frame_last_sp) == NULL. | |
3303 // | |
3304 // If we care generating the pre-barrier without a frame (e.g. in the | |
3305 // intrinsified Reference.get() routine) then ebp might be pointing to | |
3306 // the caller frame and so this check will most likely fail at runtime. | |
3307 // | |
3308 // Expanding the call directly bypasses the generation of the check. | |
3309 // So when we do not have have a full interpreter frame on the stack | |
3310 // expand_call should be passed true. | |
3311 | |
3312 NOT_LP64( push(thread); ) | |
3313 | |
3314 if (expand_call) { | |
3315 LP64_ONLY( assert(pre_val != c_rarg1, "smashed arg"); ) | |
3316 pass_arg1(this, thread); | |
3317 pass_arg0(this, pre_val); | |
3318 MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), 2); | |
3319 } else { | |
3320 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), pre_val, thread); | |
3321 } | |
3322 | |
3323 NOT_LP64( pop(thread); ) | |
3324 | |
3325 // save the live input values | |
3326 if (pre_val != rax) | |
3327 pop(pre_val); | |
3328 | |
3329 if (obj != noreg && obj != rax) | |
3330 pop(obj); | |
3331 | |
3332 if(tosca_live) pop(rax); | |
3333 | |
3334 bind(done); | |
3335 } | |
3336 | |
3337 void MacroAssembler::g1_write_barrier_post(Register store_addr, | |
3338 Register new_val, | |
3339 Register thread, | |
3340 Register tmp, | |
3341 Register tmp2) { | |
3342 #ifdef _LP64 | |
3343 assert(thread == r15_thread, "must be"); | |
3344 #endif // _LP64 | |
3345 | |
3346 Address queue_index(thread, in_bytes(JavaThread::dirty_card_queue_offset() + | |
3347 PtrQueue::byte_offset_of_index())); | |
3348 Address buffer(thread, in_bytes(JavaThread::dirty_card_queue_offset() + | |
3349 PtrQueue::byte_offset_of_buf())); | |
3350 | |
3351 BarrierSet* bs = Universe::heap()->barrier_set(); | |
3352 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | |
3353 Label done; | |
3354 Label runtime; | |
3355 | |
3356 // Does store cross heap regions? | |
3357 | |
3358 movptr(tmp, store_addr); | |
3359 xorptr(tmp, new_val); | |
3360 shrptr(tmp, HeapRegion::LogOfHRGrainBytes); | |
3361 jcc(Assembler::equal, done); | |
3362 | |
3363 // crosses regions, storing NULL? | |
3364 | |
3365 cmpptr(new_val, (int32_t) NULL_WORD); | |
3366 jcc(Assembler::equal, done); | |
3367 | |
3368 // storing region crossing non-NULL, is card already dirty? | |
3369 | |
3370 ExternalAddress cardtable((address) ct->byte_map_base); | |
3371 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); | |
3372 #ifdef _LP64 | |
3373 const Register card_addr = tmp; | |
3374 | |
3375 movq(card_addr, store_addr); | |
3376 shrq(card_addr, CardTableModRefBS::card_shift); | |
3377 | |
3378 lea(tmp2, cardtable); | |
3379 | |
3380 // get the address of the card | |
3381 addq(card_addr, tmp2); | |
3382 #else | |
3383 const Register card_index = tmp; | |
3384 | |
3385 movl(card_index, store_addr); | |
3386 shrl(card_index, CardTableModRefBS::card_shift); | |
3387 | |
3388 Address index(noreg, card_index, Address::times_1); | |
3389 const Register card_addr = tmp; | |
3390 lea(card_addr, as_Address(ArrayAddress(cardtable, index))); | |
3391 #endif | |
3392 cmpb(Address(card_addr, 0), 0); | |
3393 jcc(Assembler::equal, done); | |
3394 | |
3395 // storing a region crossing, non-NULL oop, card is clean. | |
3396 // dirty card and log. | |
3397 | |
3398 movb(Address(card_addr, 0), 0); | |
3399 | |
3400 cmpl(queue_index, 0); | |
3401 jcc(Assembler::equal, runtime); | |
3402 subl(queue_index, wordSize); | |
3403 movptr(tmp2, buffer); | |
3404 #ifdef _LP64 | |
3405 movslq(rscratch1, queue_index); | |
3406 addq(tmp2, rscratch1); | |
3407 movq(Address(tmp2, 0), card_addr); | |
3408 #else | |
3409 addl(tmp2, queue_index); | |
3410 movl(Address(tmp2, 0), card_index); | |
3411 #endif | |
3412 jmp(done); | |
3413 | |
3414 bind(runtime); | |
3415 // save the live input values | |
3416 push(store_addr); | |
3417 push(new_val); | |
3418 #ifdef _LP64 | |
3419 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, r15_thread); | |
3420 #else | |
3421 push(thread); | |
3422 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, thread); | |
3423 pop(thread); | |
3424 #endif | |
3425 pop(new_val); | |
3426 pop(store_addr); | |
3427 | |
3428 bind(done); | |
3429 } | |
3430 | |
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db9981fd3124
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parents:
7477
diff
changeset
|
3431 #endif // INCLUDE_ALL_GCS |
7199 | 3432 ////////////////////////////////////////////////////////////////////////////////// |
3433 | |
3434 | |
3435 void MacroAssembler::store_check(Register obj) { | |
3436 // Does a store check for the oop in register obj. The content of | |
3437 // register obj is destroyed afterwards. | |
3438 store_check_part_1(obj); | |
3439 store_check_part_2(obj); | |
3440 } | |
3441 | |
3442 void MacroAssembler::store_check(Register obj, Address dst) { | |
3443 store_check(obj); | |
3444 } | |
3445 | |
3446 | |
3447 // split the store check operation so that other instructions can be scheduled inbetween | |
3448 void MacroAssembler::store_check_part_1(Register obj) { | |
3449 BarrierSet* bs = Universe::heap()->barrier_set(); | |
3450 assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind"); | |
3451 shrptr(obj, CardTableModRefBS::card_shift); | |
3452 } | |
3453 | |
3454 void MacroAssembler::store_check_part_2(Register obj) { | |
3455 BarrierSet* bs = Universe::heap()->barrier_set(); | |
3456 assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind"); | |
3457 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | |
3458 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); | |
3459 | |
3460 // The calculation for byte_map_base is as follows: | |
3461 // byte_map_base = _byte_map - (uintptr_t(low_bound) >> card_shift); | |
3462 // So this essentially converts an address to a displacement and | |
3463 // it will never need to be relocated. On 64bit however the value may be too | |
3464 // large for a 32bit displacement | |
3465 | |
3466 intptr_t disp = (intptr_t) ct->byte_map_base; | |
3467 if (is_simm32(disp)) { | |
3468 Address cardtable(noreg, obj, Address::times_1, disp); | |
3469 movb(cardtable, 0); | |
3470 } else { | |
3471 // By doing it as an ExternalAddress disp could be converted to a rip-relative | |
3472 // displacement and done in a single instruction given favorable mapping and | |
3473 // a smarter version of as_Address. Worst case it is two instructions which | |
3474 // is no worse off then loading disp into a register and doing as a simple | |
3475 // Address() as above. | |
3476 // We can't do as ExternalAddress as the only style since if disp == 0 we'll | |
3477 // assert since NULL isn't acceptable in a reloci (see 6644928). In any case | |
3478 // in some cases we'll get a single instruction version. | |
3479 | |
3480 ExternalAddress cardtable((address)disp); | |
3481 Address index(noreg, obj, Address::times_1); | |
3482 movb(as_Address(ArrayAddress(cardtable, index)), 0); | |
3483 } | |
3484 } | |
3485 | |
3486 void MacroAssembler::subptr(Register dst, int32_t imm32) { | |
3487 LP64_ONLY(subq(dst, imm32)) NOT_LP64(subl(dst, imm32)); | |
3488 } | |
3489 | |
3490 // Force generation of a 4 byte immediate value even if it fits into 8bit | |
3491 void MacroAssembler::subptr_imm32(Register dst, int32_t imm32) { | |
3492 LP64_ONLY(subq_imm32(dst, imm32)) NOT_LP64(subl_imm32(dst, imm32)); | |
3493 } | |
3494 | |
3495 void MacroAssembler::subptr(Register dst, Register src) { | |
3496 LP64_ONLY(subq(dst, src)) NOT_LP64(subl(dst, src)); | |
3497 } | |
3498 | |
3499 // C++ bool manipulation | |
3500 void MacroAssembler::testbool(Register dst) { | |
3501 if(sizeof(bool) == 1) | |
3502 testb(dst, 0xff); | |
3503 else if(sizeof(bool) == 2) { | |
3504 // testw implementation needed for two byte bools | |
3505 ShouldNotReachHere(); | |
3506 } else if(sizeof(bool) == 4) | |
3507 testl(dst, dst); | |
3508 else | |
3509 // unsupported | |
3510 ShouldNotReachHere(); | |
3511 } | |
3512 | |
3513 void MacroAssembler::testptr(Register dst, Register src) { | |
3514 LP64_ONLY(testq(dst, src)) NOT_LP64(testl(dst, src)); | |
3515 } | |
3516 | |
3517 // Defines obj, preserves var_size_in_bytes, okay for t2 == var_size_in_bytes. | |
3518 void MacroAssembler::tlab_allocate(Register obj, | |
3519 Register var_size_in_bytes, | |
3520 int con_size_in_bytes, | |
3521 Register t1, | |
3522 Register t2, | |
3523 Label& slow_case) { | |
3524 assert_different_registers(obj, t1, t2); | |
3525 assert_different_registers(obj, var_size_in_bytes, t1); | |
3526 Register end = t2; | |
3527 Register thread = NOT_LP64(t1) LP64_ONLY(r15_thread); | |
3528 | |
3529 verify_tlab(); | |
3530 | |
3531 NOT_LP64(get_thread(thread)); | |
3532 | |
3533 movptr(obj, Address(thread, JavaThread::tlab_top_offset())); | |
3534 if (var_size_in_bytes == noreg) { | |
3535 lea(end, Address(obj, con_size_in_bytes)); | |
3536 } else { | |
3537 lea(end, Address(obj, var_size_in_bytes, Address::times_1)); | |
3538 } | |
3539 cmpptr(end, Address(thread, JavaThread::tlab_end_offset())); | |
3540 jcc(Assembler::above, slow_case); | |
3541 | |
3542 // update the tlab top pointer | |
3543 movptr(Address(thread, JavaThread::tlab_top_offset()), end); | |
3544 | |
3545 // recover var_size_in_bytes if necessary | |
3546 if (var_size_in_bytes == end) { | |
3547 subptr(var_size_in_bytes, obj); | |
3548 } | |
3549 verify_tlab(); | |
3550 } | |
3551 | |
3552 // Preserves rbx, and rdx. | |
3553 Register MacroAssembler::tlab_refill(Label& retry, | |
3554 Label& try_eden, | |
3555 Label& slow_case) { | |
3556 Register top = rax; | |
3557 Register t1 = rcx; | |
3558 Register t2 = rsi; | |
3559 Register thread_reg = NOT_LP64(rdi) LP64_ONLY(r15_thread); | |
3560 assert_different_registers(top, thread_reg, t1, t2, /* preserve: */ rbx, rdx); | |
3561 Label do_refill, discard_tlab; | |
3562 | |
3563 if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) { | |
3564 // No allocation in the shared eden. | |
3565 jmp(slow_case); | |
3566 } | |
3567 | |
3568 NOT_LP64(get_thread(thread_reg)); | |
3569 | |
3570 movptr(top, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset()))); | |
3571 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset()))); | |
3572 | |
3573 // calculate amount of free space | |
3574 subptr(t1, top); | |
3575 shrptr(t1, LogHeapWordSize); | |
3576 | |
3577 // Retain tlab and allocate object in shared space if | |
3578 // the amount free in the tlab is too large to discard. | |
3579 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_refill_waste_limit_offset()))); | |
3580 jcc(Assembler::lessEqual, discard_tlab); | |
3581 | |
3582 // Retain | |
3583 // %%% yuck as movptr... | |
3584 movptr(t2, (int32_t) ThreadLocalAllocBuffer::refill_waste_limit_increment()); | |
3585 addptr(Address(thread_reg, in_bytes(JavaThread::tlab_refill_waste_limit_offset())), t2); | |
3586 if (TLABStats) { | |
3587 // increment number of slow_allocations | |
3588 addl(Address(thread_reg, in_bytes(JavaThread::tlab_slow_allocations_offset())), 1); | |
3589 } | |
3590 jmp(try_eden); | |
3591 | |
3592 bind(discard_tlab); | |
3593 if (TLABStats) { | |
3594 // increment number of refills | |
3595 addl(Address(thread_reg, in_bytes(JavaThread::tlab_number_of_refills_offset())), 1); | |
3596 // accumulate wastage -- t1 is amount free in tlab | |
3597 addl(Address(thread_reg, in_bytes(JavaThread::tlab_fast_refill_waste_offset())), t1); | |
3598 } | |
3599 | |
3600 // if tlab is currently allocated (top or end != null) then | |
3601 // fill [top, end + alignment_reserve) with array object | |
3602 testptr(top, top); | |
3603 jcc(Assembler::zero, do_refill); | |
3604 | |
3605 // set up the mark word | |
3606 movptr(Address(top, oopDesc::mark_offset_in_bytes()), (intptr_t)markOopDesc::prototype()->copy_set_hash(0x2)); | |
3607 // set the length to the remaining space | |
3608 subptr(t1, typeArrayOopDesc::header_size(T_INT)); | |
3609 addptr(t1, (int32_t)ThreadLocalAllocBuffer::alignment_reserve()); | |
3610 shlptr(t1, log2_intptr(HeapWordSize/sizeof(jint))); | |
3611 movl(Address(top, arrayOopDesc::length_offset_in_bytes()), t1); | |
3612 // set klass to intArrayKlass | |
3613 // dubious reloc why not an oop reloc? | |
3614 movptr(t1, ExternalAddress((address)Universe::intArrayKlassObj_addr())); | |
3615 // store klass last. concurrent gcs assumes klass length is valid if | |
3616 // klass field is not null. | |
3617 store_klass(top, t1); | |
3618 | |
3619 movptr(t1, top); | |
3620 subptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_start_offset()))); | |
3621 incr_allocated_bytes(thread_reg, t1, 0); | |
3622 | |
3623 // refill the tlab with an eden allocation | |
3624 bind(do_refill); | |
3625 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_size_offset()))); | |
3626 shlptr(t1, LogHeapWordSize); | |
3627 // allocate new tlab, address returned in top | |
3628 eden_allocate(top, t1, 0, t2, slow_case); | |
3629 | |
3630 // Check that t1 was preserved in eden_allocate. | |
3631 #ifdef ASSERT | |
3632 if (UseTLAB) { | |
3633 Label ok; | |
3634 Register tsize = rsi; | |
3635 assert_different_registers(tsize, thread_reg, t1); | |
3636 push(tsize); | |
3637 movptr(tsize, Address(thread_reg, in_bytes(JavaThread::tlab_size_offset()))); | |
3638 shlptr(tsize, LogHeapWordSize); | |
3639 cmpptr(t1, tsize); | |
3640 jcc(Assembler::equal, ok); | |
3641 STOP("assert(t1 != tlab size)"); | |
3642 should_not_reach_here(); | |
3643 | |
3644 bind(ok); | |
3645 pop(tsize); | |
3646 } | |
3647 #endif | |
3648 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_start_offset())), top); | |
3649 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())), top); | |
3650 addptr(top, t1); | |
3651 subptr(top, (int32_t)ThreadLocalAllocBuffer::alignment_reserve_in_bytes()); | |
3652 movptr(Address(thread_reg, in_bytes(JavaThread::tlab_end_offset())), top); | |
3653 verify_tlab(); | |
3654 jmp(retry); | |
3655 | |
3656 return thread_reg; // for use by caller | |
3657 } | |
3658 | |
3659 void MacroAssembler::incr_allocated_bytes(Register thread, | |
3660 Register var_size_in_bytes, | |
3661 int con_size_in_bytes, | |
3662 Register t1) { | |
3663 if (!thread->is_valid()) { | |
3664 #ifdef _LP64 | |
3665 thread = r15_thread; | |
3666 #else | |
3667 assert(t1->is_valid(), "need temp reg"); | |
3668 thread = t1; | |
3669 get_thread(thread); | |
3670 #endif | |
3671 } | |
3672 | |
3673 #ifdef _LP64 | |
3674 if (var_size_in_bytes->is_valid()) { | |
3675 addq(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), var_size_in_bytes); | |
3676 } else { | |
3677 addq(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), con_size_in_bytes); | |
3678 } | |
3679 #else | |
3680 if (var_size_in_bytes->is_valid()) { | |
3681 addl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), var_size_in_bytes); | |
3682 } else { | |
3683 addl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())), con_size_in_bytes); | |
3684 } | |
3685 adcl(Address(thread, in_bytes(JavaThread::allocated_bytes_offset())+4), 0); | |
3686 #endif | |
3687 } | |
3688 | |
3689 void MacroAssembler::fp_runtime_fallback(address runtime_entry, int nb_args, int num_fpu_regs_in_use) { | |
3690 pusha(); | |
3691 | |
3692 // if we are coming from c1, xmm registers may be live | |
3693 int off = 0; | |
3694 if (UseSSE == 1) { | |
3695 subptr(rsp, sizeof(jdouble)*8); | |
3696 movflt(Address(rsp,off++*sizeof(jdouble)),xmm0); | |
3697 movflt(Address(rsp,off++*sizeof(jdouble)),xmm1); | |
3698 movflt(Address(rsp,off++*sizeof(jdouble)),xmm2); | |
3699 movflt(Address(rsp,off++*sizeof(jdouble)),xmm3); | |
3700 movflt(Address(rsp,off++*sizeof(jdouble)),xmm4); | |
3701 movflt(Address(rsp,off++*sizeof(jdouble)),xmm5); | |
3702 movflt(Address(rsp,off++*sizeof(jdouble)),xmm6); | |
3703 movflt(Address(rsp,off++*sizeof(jdouble)),xmm7); | |
3704 } else if (UseSSE >= 2) { | |
3705 #ifdef COMPILER2 | |
3706 if (MaxVectorSize > 16) { | |
3707 assert(UseAVX > 0, "256bit vectors are supported only with AVX"); | |
3708 // Save upper half of YMM registes | |
3709 subptr(rsp, 16 * LP64_ONLY(16) NOT_LP64(8)); | |
3710 vextractf128h(Address(rsp, 0),xmm0); | |
3711 vextractf128h(Address(rsp, 16),xmm1); | |
3712 vextractf128h(Address(rsp, 32),xmm2); | |
3713 vextractf128h(Address(rsp, 48),xmm3); | |
3714 vextractf128h(Address(rsp, 64),xmm4); | |
3715 vextractf128h(Address(rsp, 80),xmm5); | |
3716 vextractf128h(Address(rsp, 96),xmm6); | |
3717 vextractf128h(Address(rsp,112),xmm7); | |
3718 #ifdef _LP64 | |
3719 vextractf128h(Address(rsp,128),xmm8); | |
3720 vextractf128h(Address(rsp,144),xmm9); | |
3721 vextractf128h(Address(rsp,160),xmm10); | |
3722 vextractf128h(Address(rsp,176),xmm11); | |
3723 vextractf128h(Address(rsp,192),xmm12); | |
3724 vextractf128h(Address(rsp,208),xmm13); | |
3725 vextractf128h(Address(rsp,224),xmm14); | |
3726 vextractf128h(Address(rsp,240),xmm15); | |
3727 #endif | |
3728 } | |
3729 #endif | |
3730 // Save whole 128bit (16 bytes) XMM regiters | |
3731 subptr(rsp, 16 * LP64_ONLY(16) NOT_LP64(8)); | |
3732 movdqu(Address(rsp,off++*16),xmm0); | |
3733 movdqu(Address(rsp,off++*16),xmm1); | |
3734 movdqu(Address(rsp,off++*16),xmm2); | |
3735 movdqu(Address(rsp,off++*16),xmm3); | |
3736 movdqu(Address(rsp,off++*16),xmm4); | |
3737 movdqu(Address(rsp,off++*16),xmm5); | |
3738 movdqu(Address(rsp,off++*16),xmm6); | |
3739 movdqu(Address(rsp,off++*16),xmm7); | |
3740 #ifdef _LP64 | |
3741 movdqu(Address(rsp,off++*16),xmm8); | |
3742 movdqu(Address(rsp,off++*16),xmm9); | |
3743 movdqu(Address(rsp,off++*16),xmm10); | |
3744 movdqu(Address(rsp,off++*16),xmm11); | |
3745 movdqu(Address(rsp,off++*16),xmm12); | |
3746 movdqu(Address(rsp,off++*16),xmm13); | |
3747 movdqu(Address(rsp,off++*16),xmm14); | |
3748 movdqu(Address(rsp,off++*16),xmm15); | |
3749 #endif | |
3750 } | |
3751 | |
3752 // Preserve registers across runtime call | |
3753 int incoming_argument_and_return_value_offset = -1; | |
3754 if (num_fpu_regs_in_use > 1) { | |
3755 // Must preserve all other FPU regs (could alternatively convert | |
3756 // SharedRuntime::dsin, dcos etc. into assembly routines known not to trash | |
3757 // FPU state, but can not trust C compiler) | |
3758 NEEDS_CLEANUP; | |
3759 // NOTE that in this case we also push the incoming argument(s) to | |
3760 // the stack and restore it later; we also use this stack slot to | |
3761 // hold the return value from dsin, dcos etc. | |
3762 for (int i = 0; i < num_fpu_regs_in_use; i++) { | |
3763 subptr(rsp, sizeof(jdouble)); | |
3764 fstp_d(Address(rsp, 0)); | |
3765 } | |
3766 incoming_argument_and_return_value_offset = sizeof(jdouble)*(num_fpu_regs_in_use-1); | |
3767 for (int i = nb_args-1; i >= 0; i--) { | |
3768 fld_d(Address(rsp, incoming_argument_and_return_value_offset-i*sizeof(jdouble))); | |
3769 } | |
3770 } | |
3771 | |
3772 subptr(rsp, nb_args*sizeof(jdouble)); | |
3773 for (int i = 0; i < nb_args; i++) { | |
3774 fstp_d(Address(rsp, i*sizeof(jdouble))); | |
3775 } | |
3776 | |
3777 #ifdef _LP64 | |
3778 if (nb_args > 0) { | |
3779 movdbl(xmm0, Address(rsp, 0)); | |
3780 } | |
3781 if (nb_args > 1) { | |
3782 movdbl(xmm1, Address(rsp, sizeof(jdouble))); | |
3783 } | |
3784 assert(nb_args <= 2, "unsupported number of args"); | |
3785 #endif // _LP64 | |
3786 | |
3787 // NOTE: we must not use call_VM_leaf here because that requires a | |
3788 // complete interpreter frame in debug mode -- same bug as 4387334 | |
3789 // MacroAssembler::call_VM_leaf_base is perfectly safe and will | |
3790 // do proper 64bit abi | |
3791 | |
3792 NEEDS_CLEANUP; | |
3793 // Need to add stack banging before this runtime call if it needs to | |
3794 // be taken; however, there is no generic stack banging routine at | |
3795 // the MacroAssembler level | |
3796 | |
3797 MacroAssembler::call_VM_leaf_base(runtime_entry, 0); | |
3798 | |
3799 #ifdef _LP64 | |
3800 movsd(Address(rsp, 0), xmm0); | |
3801 fld_d(Address(rsp, 0)); | |
3802 #endif // _LP64 | |
3803 addptr(rsp, sizeof(jdouble) * nb_args); | |
3804 if (num_fpu_regs_in_use > 1) { | |
3805 // Must save return value to stack and then restore entire FPU | |
3806 // stack except incoming arguments | |
3807 fstp_d(Address(rsp, incoming_argument_and_return_value_offset)); | |
3808 for (int i = 0; i < num_fpu_regs_in_use - nb_args; i++) { | |
3809 fld_d(Address(rsp, 0)); | |
3810 addptr(rsp, sizeof(jdouble)); | |
3811 } | |
3812 fld_d(Address(rsp, (nb_args-1)*sizeof(jdouble))); | |
3813 addptr(rsp, sizeof(jdouble) * nb_args); | |
3814 } | |
3815 | |
3816 off = 0; | |
3817 if (UseSSE == 1) { | |
3818 movflt(xmm0, Address(rsp,off++*sizeof(jdouble))); | |
3819 movflt(xmm1, Address(rsp,off++*sizeof(jdouble))); | |
3820 movflt(xmm2, Address(rsp,off++*sizeof(jdouble))); | |
3821 movflt(xmm3, Address(rsp,off++*sizeof(jdouble))); | |
3822 movflt(xmm4, Address(rsp,off++*sizeof(jdouble))); | |
3823 movflt(xmm5, Address(rsp,off++*sizeof(jdouble))); | |
3824 movflt(xmm6, Address(rsp,off++*sizeof(jdouble))); | |
3825 movflt(xmm7, Address(rsp,off++*sizeof(jdouble))); | |
3826 addptr(rsp, sizeof(jdouble)*8); | |
3827 } else if (UseSSE >= 2) { | |
3828 // Restore whole 128bit (16 bytes) XMM regiters | |
3829 movdqu(xmm0, Address(rsp,off++*16)); | |
3830 movdqu(xmm1, Address(rsp,off++*16)); | |
3831 movdqu(xmm2, Address(rsp,off++*16)); | |
3832 movdqu(xmm3, Address(rsp,off++*16)); | |
3833 movdqu(xmm4, Address(rsp,off++*16)); | |
3834 movdqu(xmm5, Address(rsp,off++*16)); | |
3835 movdqu(xmm6, Address(rsp,off++*16)); | |
3836 movdqu(xmm7, Address(rsp,off++*16)); | |
3837 #ifdef _LP64 | |
3838 movdqu(xmm8, Address(rsp,off++*16)); | |
3839 movdqu(xmm9, Address(rsp,off++*16)); | |
3840 movdqu(xmm10, Address(rsp,off++*16)); | |
3841 movdqu(xmm11, Address(rsp,off++*16)); | |
3842 movdqu(xmm12, Address(rsp,off++*16)); | |
3843 movdqu(xmm13, Address(rsp,off++*16)); | |
3844 movdqu(xmm14, Address(rsp,off++*16)); | |
3845 movdqu(xmm15, Address(rsp,off++*16)); | |
3846 #endif | |
3847 addptr(rsp, 16 * LP64_ONLY(16) NOT_LP64(8)); | |
3848 #ifdef COMPILER2 | |
3849 if (MaxVectorSize > 16) { | |
3850 // Restore upper half of YMM registes. | |
3851 vinsertf128h(xmm0, Address(rsp, 0)); | |
3852 vinsertf128h(xmm1, Address(rsp, 16)); | |
3853 vinsertf128h(xmm2, Address(rsp, 32)); | |
3854 vinsertf128h(xmm3, Address(rsp, 48)); | |
3855 vinsertf128h(xmm4, Address(rsp, 64)); | |
3856 vinsertf128h(xmm5, Address(rsp, 80)); | |
3857 vinsertf128h(xmm6, Address(rsp, 96)); | |
3858 vinsertf128h(xmm7, Address(rsp,112)); | |
3859 #ifdef _LP64 | |
3860 vinsertf128h(xmm8, Address(rsp,128)); | |
3861 vinsertf128h(xmm9, Address(rsp,144)); | |
3862 vinsertf128h(xmm10, Address(rsp,160)); | |
3863 vinsertf128h(xmm11, Address(rsp,176)); | |
3864 vinsertf128h(xmm12, Address(rsp,192)); | |
3865 vinsertf128h(xmm13, Address(rsp,208)); | |
3866 vinsertf128h(xmm14, Address(rsp,224)); | |
3867 vinsertf128h(xmm15, Address(rsp,240)); | |
3868 #endif | |
3869 addptr(rsp, 16 * LP64_ONLY(16) NOT_LP64(8)); | |
3870 } | |
3871 #endif | |
3872 } | |
3873 popa(); | |
3874 } | |
3875 | |
3876 static const double pi_4 = 0.7853981633974483; | |
3877 | |
3878 void MacroAssembler::trigfunc(char trig, int num_fpu_regs_in_use) { | |
3879 // A hand-coded argument reduction for values in fabs(pi/4, pi/2) | |
3880 // was attempted in this code; unfortunately it appears that the | |
3881 // switch to 80-bit precision and back causes this to be | |
3882 // unprofitable compared with simply performing a runtime call if | |
3883 // the argument is out of the (-pi/4, pi/4) range. | |
3884 | |
3885 Register tmp = noreg; | |
3886 if (!VM_Version::supports_cmov()) { | |
3887 // fcmp needs a temporary so preserve rbx, | |
3888 tmp = rbx; | |
3889 push(tmp); | |
3890 } | |
3891 | |
3892 Label slow_case, done; | |
3893 | |
3894 ExternalAddress pi4_adr = (address)&pi_4; | |
3895 if (reachable(pi4_adr)) { | |
3896 // x ?<= pi/4 | |
3897 fld_d(pi4_adr); | |
3898 fld_s(1); // Stack: X PI/4 X | |
3899 fabs(); // Stack: |X| PI/4 X | |
3900 fcmp(tmp); | |
3901 jcc(Assembler::above, slow_case); | |
3902 | |
3903 // fastest case: -pi/4 <= x <= pi/4 | |
3904 switch(trig) { | |
3905 case 's': | |
3906 fsin(); | |
3907 break; | |
3908 case 'c': | |
3909 fcos(); | |
3910 break; | |
3911 case 't': | |
3912 ftan(); | |
3913 break; | |
3914 default: | |
3915 assert(false, "bad intrinsic"); | |
3916 break; | |
3917 } | |
3918 jmp(done); | |
3919 } | |
3920 | |
3921 // slow case: runtime call | |
3922 bind(slow_case); | |
3923 | |
3924 switch(trig) { | |
3925 case 's': | |
3926 { | |
3927 fp_runtime_fallback(CAST_FROM_FN_PTR(address, SharedRuntime::dsin), 1, num_fpu_regs_in_use); | |
3928 } | |
3929 break; | |
3930 case 'c': | |
3931 { | |
3932 fp_runtime_fallback(CAST_FROM_FN_PTR(address, SharedRuntime::dcos), 1, num_fpu_regs_in_use); | |
3933 } | |
3934 break; | |
3935 case 't': | |
3936 { | |
3937 fp_runtime_fallback(CAST_FROM_FN_PTR(address, SharedRuntime::dtan), 1, num_fpu_regs_in_use); | |
3938 } | |
3939 break; | |
3940 default: | |
3941 assert(false, "bad intrinsic"); | |
3942 break; | |
3943 } | |
3944 | |
3945 // Come here with result in F-TOS | |
3946 bind(done); | |
3947 | |
3948 if (tmp != noreg) { | |
3949 pop(tmp); | |
3950 } | |
3951 } | |
3952 | |
3953 | |
3954 // Look up the method for a megamorphic invokeinterface call. | |
3955 // The target method is determined by <intf_klass, itable_index>. | |
3956 // The receiver klass is in recv_klass. | |
3957 // On success, the result will be in method_result, and execution falls through. | |
3958 // On failure, execution transfers to the given label. | |
3959 void MacroAssembler::lookup_interface_method(Register recv_klass, | |
3960 Register intf_klass, | |
3961 RegisterOrConstant itable_index, | |
3962 Register method_result, | |
3963 Register scan_temp, | |
3964 Label& L_no_such_interface) { | |
3965 assert_different_registers(recv_klass, intf_klass, method_result, scan_temp); | |
3966 assert(itable_index.is_constant() || itable_index.as_register() == method_result, | |
3967 "caller must use same register for non-constant itable index as for method"); | |
3968 | |
3969 // Compute start of first itableOffsetEntry (which is at the end of the vtable) | |
3970 int vtable_base = InstanceKlass::vtable_start_offset() * wordSize; | |
3971 int itentry_off = itableMethodEntry::method_offset_in_bytes(); | |
3972 int scan_step = itableOffsetEntry::size() * wordSize; | |
3973 int vte_size = vtableEntry::size() * wordSize; | |
3974 Address::ScaleFactor times_vte_scale = Address::times_ptr; | |
3975 assert(vte_size == wordSize, "else adjust times_vte_scale"); | |
3976 | |
3977 movl(scan_temp, Address(recv_klass, InstanceKlass::vtable_length_offset() * wordSize)); | |
3978 | |
3979 // %%% Could store the aligned, prescaled offset in the klassoop. | |
3980 lea(scan_temp, Address(recv_klass, scan_temp, times_vte_scale, vtable_base)); | |
3981 if (HeapWordsPerLong > 1) { | |
3982 // Round up to align_object_offset boundary | |
3983 // see code for InstanceKlass::start_of_itable! | |
3984 round_to(scan_temp, BytesPerLong); | |
3985 } | |
3986 | |
3987 // Adjust recv_klass by scaled itable_index, so we can free itable_index. | |
3988 assert(itableMethodEntry::size() * wordSize == wordSize, "adjust the scaling in the code below"); | |
3989 lea(recv_klass, Address(recv_klass, itable_index, Address::times_ptr, itentry_off)); | |
3990 | |
3991 // for (scan = klass->itable(); scan->interface() != NULL; scan += scan_step) { | |
3992 // if (scan->interface() == intf) { | |
3993 // result = (klass + scan->offset() + itable_index); | |
3994 // } | |
3995 // } | |
3996 Label search, found_method; | |
3997 | |
3998 for (int peel = 1; peel >= 0; peel--) { | |
3999 movptr(method_result, Address(scan_temp, itableOffsetEntry::interface_offset_in_bytes())); | |
4000 cmpptr(intf_klass, method_result); | |
4001 | |
4002 if (peel) { | |
4003 jccb(Assembler::equal, found_method); | |
4004 } else { | |
4005 jccb(Assembler::notEqual, search); | |
4006 // (invert the test to fall through to found_method...) | |
4007 } | |
4008 | |
4009 if (!peel) break; | |
4010 | |
4011 bind(search); | |
4012 | |
4013 // Check that the previous entry is non-null. A null entry means that | |
4014 // the receiver class doesn't implement the interface, and wasn't the | |
4015 // same as when the caller was compiled. | |
4016 testptr(method_result, method_result); | |
4017 jcc(Assembler::zero, L_no_such_interface); | |
4018 addptr(scan_temp, scan_step); | |
4019 } | |
4020 | |
4021 bind(found_method); | |
4022 | |
4023 // Got a hit. | |
4024 movl(scan_temp, Address(scan_temp, itableOffsetEntry::offset_offset_in_bytes())); | |
4025 movptr(method_result, Address(recv_klass, scan_temp, Address::times_1)); | |
4026 } | |
4027 | |
4028 | |
4029 // virtual method calling | |
4030 void MacroAssembler::lookup_virtual_method(Register recv_klass, | |
4031 RegisterOrConstant vtable_index, | |
4032 Register method_result) { | |
4033 const int base = InstanceKlass::vtable_start_offset() * wordSize; | |
4034 assert(vtableEntry::size() * wordSize == wordSize, "else adjust the scaling in the code below"); | |
4035 Address vtable_entry_addr(recv_klass, | |
4036 vtable_index, Address::times_ptr, | |
4037 base + vtableEntry::method_offset_in_bytes()); | |
4038 movptr(method_result, vtable_entry_addr); | |
4039 } | |
4040 | |
4041 | |
4042 void MacroAssembler::check_klass_subtype(Register sub_klass, | |
4043 Register super_klass, | |
4044 Register temp_reg, | |
4045 Label& L_success) { | |
4046 Label L_failure; | |
4047 check_klass_subtype_fast_path(sub_klass, super_klass, temp_reg, &L_success, &L_failure, NULL); | |
4048 check_klass_subtype_slow_path(sub_klass, super_klass, temp_reg, noreg, &L_success, NULL); | |
4049 bind(L_failure); | |
4050 } | |
4051 | |
4052 | |
4053 void MacroAssembler::check_klass_subtype_fast_path(Register sub_klass, | |
4054 Register super_klass, | |
4055 Register temp_reg, | |
4056 Label* L_success, | |
4057 Label* L_failure, | |
4058 Label* L_slow_path, | |
4059 RegisterOrConstant super_check_offset) { | |
4060 assert_different_registers(sub_klass, super_klass, temp_reg); | |
4061 bool must_load_sco = (super_check_offset.constant_or_zero() == -1); | |
4062 if (super_check_offset.is_register()) { | |
4063 assert_different_registers(sub_klass, super_klass, | |
4064 super_check_offset.as_register()); | |
4065 } else if (must_load_sco) { | |
4066 assert(temp_reg != noreg, "supply either a temp or a register offset"); | |
4067 } | |
4068 | |
4069 Label L_fallthrough; | |
4070 int label_nulls = 0; | |
4071 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; } | |
4072 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; } | |
4073 if (L_slow_path == NULL) { L_slow_path = &L_fallthrough; label_nulls++; } | |
4074 assert(label_nulls <= 1, "at most one NULL in the batch"); | |
4075 | |
4076 int sc_offset = in_bytes(Klass::secondary_super_cache_offset()); | |
4077 int sco_offset = in_bytes(Klass::super_check_offset_offset()); | |
4078 Address super_check_offset_addr(super_klass, sco_offset); | |
4079 | |
4080 // Hacked jcc, which "knows" that L_fallthrough, at least, is in | |
4081 // range of a jccb. If this routine grows larger, reconsider at | |
4082 // least some of these. | |
4083 #define local_jcc(assembler_cond, label) \ | |
4084 if (&(label) == &L_fallthrough) jccb(assembler_cond, label); \ | |
4085 else jcc( assembler_cond, label) /*omit semi*/ | |
4086 | |
4087 // Hacked jmp, which may only be used just before L_fallthrough. | |
4088 #define final_jmp(label) \ | |
4089 if (&(label) == &L_fallthrough) { /*do nothing*/ } \ | |
4090 else jmp(label) /*omit semi*/ | |
4091 | |
4092 // If the pointers are equal, we are done (e.g., String[] elements). | |
4093 // This self-check enables sharing of secondary supertype arrays among | |
4094 // non-primary types such as array-of-interface. Otherwise, each such | |
4095 // type would need its own customized SSA. | |
4096 // We move this check to the front of the fast path because many | |
4097 // type checks are in fact trivially successful in this manner, | |
4098 // so we get a nicely predicted branch right at the start of the check. | |
4099 cmpptr(sub_klass, super_klass); | |
4100 local_jcc(Assembler::equal, *L_success); | |
4101 | |
4102 // Check the supertype display: | |
4103 if (must_load_sco) { | |
4104 // Positive movl does right thing on LP64. | |
4105 movl(temp_reg, super_check_offset_addr); | |
4106 super_check_offset = RegisterOrConstant(temp_reg); | |
4107 } | |
4108 Address super_check_addr(sub_klass, super_check_offset, Address::times_1, 0); | |
4109 cmpptr(super_klass, super_check_addr); // load displayed supertype | |
4110 | |
4111 // This check has worked decisively for primary supers. | |
4112 // Secondary supers are sought in the super_cache ('super_cache_addr'). | |
4113 // (Secondary supers are interfaces and very deeply nested subtypes.) | |
4114 // This works in the same check above because of a tricky aliasing | |
4115 // between the super_cache and the primary super display elements. | |
4116 // (The 'super_check_addr' can address either, as the case requires.) | |
4117 // Note that the cache is updated below if it does not help us find | |
4118 // what we need immediately. | |
4119 // So if it was a primary super, we can just fail immediately. | |
4120 // Otherwise, it's the slow path for us (no success at this point). | |
4121 | |
4122 if (super_check_offset.is_register()) { | |
4123 local_jcc(Assembler::equal, *L_success); | |
4124 cmpl(super_check_offset.as_register(), sc_offset); | |
4125 if (L_failure == &L_fallthrough) { | |
4126 local_jcc(Assembler::equal, *L_slow_path); | |
4127 } else { | |
4128 local_jcc(Assembler::notEqual, *L_failure); | |
4129 final_jmp(*L_slow_path); | |
4130 } | |
4131 } else if (super_check_offset.as_constant() == sc_offset) { | |
4132 // Need a slow path; fast failure is impossible. | |
4133 if (L_slow_path == &L_fallthrough) { | |
4134 local_jcc(Assembler::equal, *L_success); | |
4135 } else { | |
4136 local_jcc(Assembler::notEqual, *L_slow_path); | |
4137 final_jmp(*L_success); | |
4138 } | |
4139 } else { | |
4140 // No slow path; it's a fast decision. | |
4141 if (L_failure == &L_fallthrough) { | |
4142 local_jcc(Assembler::equal, *L_success); | |
4143 } else { | |
4144 local_jcc(Assembler::notEqual, *L_failure); | |
4145 final_jmp(*L_success); | |
4146 } | |
4147 } | |
4148 | |
4149 bind(L_fallthrough); | |
4150 | |
4151 #undef local_jcc | |
4152 #undef final_jmp | |
4153 } | |
4154 | |
4155 | |
4156 void MacroAssembler::check_klass_subtype_slow_path(Register sub_klass, | |
4157 Register super_klass, | |
4158 Register temp_reg, | |
4159 Register temp2_reg, | |
4160 Label* L_success, | |
4161 Label* L_failure, | |
4162 bool set_cond_codes) { | |
4163 assert_different_registers(sub_klass, super_klass, temp_reg); | |
4164 if (temp2_reg != noreg) | |
4165 assert_different_registers(sub_klass, super_klass, temp_reg, temp2_reg); | |
4166 #define IS_A_TEMP(reg) ((reg) == temp_reg || (reg) == temp2_reg) | |
4167 | |
4168 Label L_fallthrough; | |
4169 int label_nulls = 0; | |
4170 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; } | |
4171 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; } | |
4172 assert(label_nulls <= 1, "at most one NULL in the batch"); | |
4173 | |
4174 // a couple of useful fields in sub_klass: | |
4175 int ss_offset = in_bytes(Klass::secondary_supers_offset()); | |
4176 int sc_offset = in_bytes(Klass::secondary_super_cache_offset()); | |
4177 Address secondary_supers_addr(sub_klass, ss_offset); | |
4178 Address super_cache_addr( sub_klass, sc_offset); | |
4179 | |
4180 // Do a linear scan of the secondary super-klass chain. | |
4181 // This code is rarely used, so simplicity is a virtue here. | |
4182 // The repne_scan instruction uses fixed registers, which we must spill. | |
4183 // Don't worry too much about pre-existing connections with the input regs. | |
4184 | |
4185 assert(sub_klass != rax, "killed reg"); // killed by mov(rax, super) | |
4186 assert(sub_klass != rcx, "killed reg"); // killed by lea(rcx, &pst_counter) | |
4187 | |
4188 // Get super_klass value into rax (even if it was in rdi or rcx). | |
4189 bool pushed_rax = false, pushed_rcx = false, pushed_rdi = false; | |
4190 if (super_klass != rax || UseCompressedOops) { | |
4191 if (!IS_A_TEMP(rax)) { push(rax); pushed_rax = true; } | |
4192 mov(rax, super_klass); | |
4193 } | |
4194 if (!IS_A_TEMP(rcx)) { push(rcx); pushed_rcx = true; } | |
4195 if (!IS_A_TEMP(rdi)) { push(rdi); pushed_rdi = true; } | |
4196 | |
4197 #ifndef PRODUCT | |
4198 int* pst_counter = &SharedRuntime::_partial_subtype_ctr; | |
4199 ExternalAddress pst_counter_addr((address) pst_counter); | |
4200 NOT_LP64( incrementl(pst_counter_addr) ); | |
4201 LP64_ONLY( lea(rcx, pst_counter_addr) ); | |
4202 LP64_ONLY( incrementl(Address(rcx, 0)) ); | |
4203 #endif //PRODUCT | |
4204 | |
4205 // We will consult the secondary-super array. | |
4206 movptr(rdi, secondary_supers_addr); | |
4207 // Load the array length. (Positive movl does right thing on LP64.) | |
4208 movl(rcx, Address(rdi, Array<Klass*>::length_offset_in_bytes())); | |
4209 // Skip to start of data. | |
4210 addptr(rdi, Array<Klass*>::base_offset_in_bytes()); | |
4211 | |
4212 // Scan RCX words at [RDI] for an occurrence of RAX. | |
4213 // Set NZ/Z based on last compare. | |
4214 // Z flag value will not be set by 'repne' if RCX == 0 since 'repne' does | |
4215 // not change flags (only scas instruction which is repeated sets flags). | |
4216 // Set Z = 0 (not equal) before 'repne' to indicate that class was not found. | |
4217 | |
4218 testptr(rax,rax); // Set Z = 0 | |
4219 repne_scan(); | |
4220 | |
4221 // Unspill the temp. registers: | |
4222 if (pushed_rdi) pop(rdi); | |
4223 if (pushed_rcx) pop(rcx); | |
4224 if (pushed_rax) pop(rax); | |
4225 | |
4226 if (set_cond_codes) { | |
4227 // Special hack for the AD files: rdi is guaranteed non-zero. | |
4228 assert(!pushed_rdi, "rdi must be left non-NULL"); | |
4229 // Also, the condition codes are properly set Z/NZ on succeed/failure. | |
4230 } | |
4231 | |
4232 if (L_failure == &L_fallthrough) | |
4233 jccb(Assembler::notEqual, *L_failure); | |
4234 else jcc(Assembler::notEqual, *L_failure); | |
4235 | |
4236 // Success. Cache the super we found and proceed in triumph. | |
4237 movptr(super_cache_addr, super_klass); | |
4238 | |
4239 if (L_success != &L_fallthrough) { | |
4240 jmp(*L_success); | |
4241 } | |
4242 | |
4243 #undef IS_A_TEMP | |
4244 | |
4245 bind(L_fallthrough); | |
4246 } | |
4247 | |
4248 | |
4249 void MacroAssembler::cmov32(Condition cc, Register dst, Address src) { | |
4250 if (VM_Version::supports_cmov()) { | |
4251 cmovl(cc, dst, src); | |
4252 } else { | |
4253 Label L; | |
4254 jccb(negate_condition(cc), L); | |
4255 movl(dst, src); | |
4256 bind(L); | |
4257 } | |
4258 } | |
4259 | |
4260 void MacroAssembler::cmov32(Condition cc, Register dst, Register src) { | |
4261 if (VM_Version::supports_cmov()) { | |
4262 cmovl(cc, dst, src); | |
4263 } else { | |
4264 Label L; | |
4265 jccb(negate_condition(cc), L); | |
4266 movl(dst, src); | |
4267 bind(L); | |
4268 } | |
4269 } | |
4270 | |
4271 void MacroAssembler::verify_oop(Register reg, const char* s) { | |
4272 if (!VerifyOops) return; | |
4273 | |
4274 // Pass register number to verify_oop_subroutine | |
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4275 const char* b = NULL; |
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4276 { |
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4277 ResourceMark rm; |
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4278 stringStream ss; |
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4279 ss.print("verify_oop: %s: %s", reg->name(), s); |
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4280 b = code_string(ss.as_string()); |
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4281 } |
7199 | 4282 BLOCK_COMMENT("verify_oop {"); |
4283 #ifdef _LP64 | |
4284 push(rscratch1); // save r10, trashed by movptr() | |
4285 #endif | |
4286 push(rax); // save rax, | |
4287 push(reg); // pass register argument | |
4288 ExternalAddress buffer((address) b); | |
4289 // avoid using pushptr, as it modifies scratch registers | |
4290 // and our contract is not to modify anything | |
4291 movptr(rax, buffer.addr()); | |
4292 push(rax); | |
4293 // call indirectly to solve generation ordering problem | |
4294 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address())); | |
4295 call(rax); | |
4296 // Caller pops the arguments (oop, message) and restores rax, r10 | |
4297 BLOCK_COMMENT("} verify_oop"); | |
4298 } | |
4299 | |
4300 | |
4301 RegisterOrConstant MacroAssembler::delayed_value_impl(intptr_t* delayed_value_addr, | |
4302 Register tmp, | |
4303 int offset) { | |
4304 intptr_t value = *delayed_value_addr; | |
4305 if (value != 0) | |
4306 return RegisterOrConstant(value + offset); | |
4307 | |
4308 // load indirectly to solve generation ordering problem | |
4309 movptr(tmp, ExternalAddress((address) delayed_value_addr)); | |
4310 | |
4311 #ifdef ASSERT | |
4312 { Label L; | |
4313 testptr(tmp, tmp); | |
4314 if (WizardMode) { | |
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4315 const char* buf = NULL; |
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4316 { |
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4317 ResourceMark rm; |
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4318 stringStream ss; |
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4319 ss.print("DelayedValue="INTPTR_FORMAT, delayed_value_addr[1]); |
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4320 buf = code_string(ss.as_string()); |
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4321 } |
7199 | 4322 jcc(Assembler::notZero, L); |
4323 STOP(buf); | |
4324 } else { | |
4325 jccb(Assembler::notZero, L); | |
4326 hlt(); | |
4327 } | |
4328 bind(L); | |
4329 } | |
4330 #endif | |
4331 | |
4332 if (offset != 0) | |
4333 addptr(tmp, offset); | |
4334 | |
4335 return RegisterOrConstant(tmp); | |
4336 } | |
4337 | |
4338 | |
4339 Address MacroAssembler::argument_address(RegisterOrConstant arg_slot, | |
4340 int extra_slot_offset) { | |
4341 // cf. TemplateTable::prepare_invoke(), if (load_receiver). | |
4342 int stackElementSize = Interpreter::stackElementSize; | |
4343 int offset = Interpreter::expr_offset_in_bytes(extra_slot_offset+0); | |
4344 #ifdef ASSERT | |
4345 int offset1 = Interpreter::expr_offset_in_bytes(extra_slot_offset+1); | |
4346 assert(offset1 - offset == stackElementSize, "correct arithmetic"); | |
4347 #endif | |
4348 Register scale_reg = noreg; | |
4349 Address::ScaleFactor scale_factor = Address::no_scale; | |
4350 if (arg_slot.is_constant()) { | |
4351 offset += arg_slot.as_constant() * stackElementSize; | |
4352 } else { | |
4353 scale_reg = arg_slot.as_register(); | |
4354 scale_factor = Address::times(stackElementSize); | |
4355 } | |
4356 offset += wordSize; // return PC is on stack | |
4357 return Address(rsp, scale_reg, scale_factor, offset); | |
4358 } | |
4359 | |
4360 | |
4361 void MacroAssembler::verify_oop_addr(Address addr, const char* s) { | |
4362 if (!VerifyOops) return; | |
4363 | |
4364 // Address adjust(addr.base(), addr.index(), addr.scale(), addr.disp() + BytesPerWord); | |
4365 // Pass register number to verify_oop_subroutine | |
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4366 const char* b = NULL; |
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4367 { |
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4368 ResourceMark rm; |
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4369 stringStream ss; |
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4370 ss.print("verify_oop_addr: %s", s); |
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4371 b = code_string(ss.as_string()); |
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4372 } |
7199 | 4373 #ifdef _LP64 |
4374 push(rscratch1); // save r10, trashed by movptr() | |
4375 #endif | |
4376 push(rax); // save rax, | |
4377 // addr may contain rsp so we will have to adjust it based on the push | |
4378 // we just did (and on 64 bit we do two pushes) | |
4379 // NOTE: 64bit seemed to have had a bug in that it did movq(addr, rax); which | |
4380 // stores rax into addr which is backwards of what was intended. | |
4381 if (addr.uses(rsp)) { | |
4382 lea(rax, addr); | |
4383 pushptr(Address(rax, LP64_ONLY(2 *) BytesPerWord)); | |
4384 } else { | |
4385 pushptr(addr); | |
4386 } | |
4387 | |
4388 ExternalAddress buffer((address) b); | |
4389 // pass msg argument | |
4390 // avoid using pushptr, as it modifies scratch registers | |
4391 // and our contract is not to modify anything | |
4392 movptr(rax, buffer.addr()); | |
4393 push(rax); | |
4394 | |
4395 // call indirectly to solve generation ordering problem | |
4396 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address())); | |
4397 call(rax); | |
4398 // Caller pops the arguments (addr, message) and restores rax, r10. | |
4399 } | |
4400 | |
4401 void MacroAssembler::verify_tlab() { | |
4402 #ifdef ASSERT | |
4403 if (UseTLAB && VerifyOops) { | |
4404 Label next, ok; | |
4405 Register t1 = rsi; | |
4406 Register thread_reg = NOT_LP64(rbx) LP64_ONLY(r15_thread); | |
4407 | |
4408 push(t1); | |
4409 NOT_LP64(push(thread_reg)); | |
4410 NOT_LP64(get_thread(thread_reg)); | |
4411 | |
4412 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset()))); | |
4413 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_start_offset()))); | |
4414 jcc(Assembler::aboveEqual, next); | |
4415 STOP("assert(top >= start)"); | |
4416 should_not_reach_here(); | |
4417 | |
4418 bind(next); | |
4419 movptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset()))); | |
4420 cmpptr(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset()))); | |
4421 jcc(Assembler::aboveEqual, ok); | |
4422 STOP("assert(top <= end)"); | |
4423 should_not_reach_here(); | |
4424 | |
4425 bind(ok); | |
4426 NOT_LP64(pop(thread_reg)); | |
4427 pop(t1); | |
4428 } | |
4429 #endif | |
4430 } | |
4431 | |
4432 class ControlWord { | |
4433 public: | |
4434 int32_t _value; | |
4435 | |
4436 int rounding_control() const { return (_value >> 10) & 3 ; } | |
4437 int precision_control() const { return (_value >> 8) & 3 ; } | |
4438 bool precision() const { return ((_value >> 5) & 1) != 0; } | |
4439 bool underflow() const { return ((_value >> 4) & 1) != 0; } | |
4440 bool overflow() const { return ((_value >> 3) & 1) != 0; } | |
4441 bool zero_divide() const { return ((_value >> 2) & 1) != 0; } | |
4442 bool denormalized() const { return ((_value >> 1) & 1) != 0; } | |
4443 bool invalid() const { return ((_value >> 0) & 1) != 0; } | |
4444 | |
4445 void print() const { | |
4446 // rounding control | |
4447 const char* rc; | |
4448 switch (rounding_control()) { | |
4449 case 0: rc = "round near"; break; | |
4450 case 1: rc = "round down"; break; | |
4451 case 2: rc = "round up "; break; | |
4452 case 3: rc = "chop "; break; | |
4453 }; | |
4454 // precision control | |
4455 const char* pc; | |
4456 switch (precision_control()) { | |
4457 case 0: pc = "24 bits "; break; | |
4458 case 1: pc = "reserved"; break; | |
4459 case 2: pc = "53 bits "; break; | |
4460 case 3: pc = "64 bits "; break; | |
4461 }; | |
4462 // flags | |
4463 char f[9]; | |
4464 f[0] = ' '; | |
4465 f[1] = ' '; | |
4466 f[2] = (precision ()) ? 'P' : 'p'; | |
4467 f[3] = (underflow ()) ? 'U' : 'u'; | |
4468 f[4] = (overflow ()) ? 'O' : 'o'; | |
4469 f[5] = (zero_divide ()) ? 'Z' : 'z'; | |
4470 f[6] = (denormalized()) ? 'D' : 'd'; | |
4471 f[7] = (invalid ()) ? 'I' : 'i'; | |
4472 f[8] = '\x0'; | |
4473 // output | |
4474 printf("%04x masks = %s, %s, %s", _value & 0xFFFF, f, rc, pc); | |
4475 } | |
4476 | |
4477 }; | |
4478 | |
4479 class StatusWord { | |
4480 public: | |
4481 int32_t _value; | |
4482 | |
4483 bool busy() const { return ((_value >> 15) & 1) != 0; } | |
4484 bool C3() const { return ((_value >> 14) & 1) != 0; } | |
4485 bool C2() const { return ((_value >> 10) & 1) != 0; } | |
4486 bool C1() const { return ((_value >> 9) & 1) != 0; } | |
4487 bool C0() const { return ((_value >> 8) & 1) != 0; } | |
4488 int top() const { return (_value >> 11) & 7 ; } | |
4489 bool error_status() const { return ((_value >> 7) & 1) != 0; } | |
4490 bool stack_fault() const { return ((_value >> 6) & 1) != 0; } | |
4491 bool precision() const { return ((_value >> 5) & 1) != 0; } | |
4492 bool underflow() const { return ((_value >> 4) & 1) != 0; } | |
4493 bool overflow() const { return ((_value >> 3) & 1) != 0; } | |
4494 bool zero_divide() const { return ((_value >> 2) & 1) != 0; } | |
4495 bool denormalized() const { return ((_value >> 1) & 1) != 0; } | |
4496 bool invalid() const { return ((_value >> 0) & 1) != 0; } | |
4497 | |
4498 void print() const { | |
4499 // condition codes | |
4500 char c[5]; | |
4501 c[0] = (C3()) ? '3' : '-'; | |
4502 c[1] = (C2()) ? '2' : '-'; | |
4503 c[2] = (C1()) ? '1' : '-'; | |
4504 c[3] = (C0()) ? '0' : '-'; | |
4505 c[4] = '\x0'; | |
4506 // flags | |
4507 char f[9]; | |
4508 f[0] = (error_status()) ? 'E' : '-'; | |
4509 f[1] = (stack_fault ()) ? 'S' : '-'; | |
4510 f[2] = (precision ()) ? 'P' : '-'; | |
4511 f[3] = (underflow ()) ? 'U' : '-'; | |
4512 f[4] = (overflow ()) ? 'O' : '-'; | |
4513 f[5] = (zero_divide ()) ? 'Z' : '-'; | |
4514 f[6] = (denormalized()) ? 'D' : '-'; | |
4515 f[7] = (invalid ()) ? 'I' : '-'; | |
4516 f[8] = '\x0'; | |
4517 // output | |
4518 printf("%04x flags = %s, cc = %s, top = %d", _value & 0xFFFF, f, c, top()); | |
4519 } | |
4520 | |
4521 }; | |
4522 | |
4523 class TagWord { | |
4524 public: | |
4525 int32_t _value; | |
4526 | |
4527 int tag_at(int i) const { return (_value >> (i*2)) & 3; } | |
4528 | |
4529 void print() const { | |
4530 printf("%04x", _value & 0xFFFF); | |
4531 } | |
4532 | |
4533 }; | |
4534 | |
4535 class FPU_Register { | |
4536 public: | |
4537 int32_t _m0; | |
4538 int32_t _m1; | |
4539 int16_t _ex; | |
4540 | |
4541 bool is_indefinite() const { | |
4542 return _ex == -1 && _m1 == (int32_t)0xC0000000 && _m0 == 0; | |
4543 } | |
4544 | |
4545 void print() const { | |
4546 char sign = (_ex < 0) ? '-' : '+'; | |
4547 const char* kind = (_ex == 0x7FFF || _ex == (int16_t)-1) ? "NaN" : " "; | |
4548 printf("%c%04hx.%08x%08x %s", sign, _ex, _m1, _m0, kind); | |
4549 }; | |
4550 | |
4551 }; | |
4552 | |
4553 class FPU_State { | |
4554 public: | |
4555 enum { | |
4556 register_size = 10, | |
4557 number_of_registers = 8, | |
4558 register_mask = 7 | |
4559 }; | |
4560 | |
4561 ControlWord _control_word; | |
4562 StatusWord _status_word; | |
4563 TagWord _tag_word; | |
4564 int32_t _error_offset; | |
4565 int32_t _error_selector; | |
4566 int32_t _data_offset; | |
4567 int32_t _data_selector; | |
4568 int8_t _register[register_size * number_of_registers]; | |
4569 | |
4570 int tag_for_st(int i) const { return _tag_word.tag_at((_status_word.top() + i) & register_mask); } | |
4571 FPU_Register* st(int i) const { return (FPU_Register*)&_register[register_size * i]; } | |
4572 | |
4573 const char* tag_as_string(int tag) const { | |
4574 switch (tag) { | |
4575 case 0: return "valid"; | |
4576 case 1: return "zero"; | |
4577 case 2: return "special"; | |
4578 case 3: return "empty"; | |
4579 } | |
4580 ShouldNotReachHere(); | |
4581 return NULL; | |
4582 } | |
4583 | |
4584 void print() const { | |
4585 // print computation registers | |
4586 { int t = _status_word.top(); | |
4587 for (int i = 0; i < number_of_registers; i++) { | |
4588 int j = (i - t) & register_mask; | |
4589 printf("%c r%d = ST%d = ", (j == 0 ? '*' : ' '), i, j); | |
4590 st(j)->print(); | |
4591 printf(" %s\n", tag_as_string(_tag_word.tag_at(i))); | |
4592 } | |
4593 } | |
4594 printf("\n"); | |
4595 // print control registers | |
4596 printf("ctrl = "); _control_word.print(); printf("\n"); | |
4597 printf("stat = "); _status_word .print(); printf("\n"); | |
4598 printf("tags = "); _tag_word .print(); printf("\n"); | |
4599 } | |
4600 | |
4601 }; | |
4602 | |
4603 class Flag_Register { | |
4604 public: | |
4605 int32_t _value; | |
4606 | |
4607 bool overflow() const { return ((_value >> 11) & 1) != 0; } | |
4608 bool direction() const { return ((_value >> 10) & 1) != 0; } | |
4609 bool sign() const { return ((_value >> 7) & 1) != 0; } | |
4610 bool zero() const { return ((_value >> 6) & 1) != 0; } | |
4611 bool auxiliary_carry() const { return ((_value >> 4) & 1) != 0; } | |
4612 bool parity() const { return ((_value >> 2) & 1) != 0; } | |
4613 bool carry() const { return ((_value >> 0) & 1) != 0; } | |
4614 | |
4615 void print() const { | |
4616 // flags | |
4617 char f[8]; | |
4618 f[0] = (overflow ()) ? 'O' : '-'; | |
4619 f[1] = (direction ()) ? 'D' : '-'; | |
4620 f[2] = (sign ()) ? 'S' : '-'; | |
4621 f[3] = (zero ()) ? 'Z' : '-'; | |
4622 f[4] = (auxiliary_carry()) ? 'A' : '-'; | |
4623 f[5] = (parity ()) ? 'P' : '-'; | |
4624 f[6] = (carry ()) ? 'C' : '-'; | |
4625 f[7] = '\x0'; | |
4626 // output | |
4627 printf("%08x flags = %s", _value, f); | |
4628 } | |
4629 | |
4630 }; | |
4631 | |
4632 class IU_Register { | |
4633 public: | |
4634 int32_t _value; | |
4635 | |
4636 void print() const { | |
4637 printf("%08x %11d", _value, _value); | |
4638 } | |
4639 | |
4640 }; | |
4641 | |
4642 class IU_State { | |
4643 public: | |
4644 Flag_Register _eflags; | |
4645 IU_Register _rdi; | |
4646 IU_Register _rsi; | |
4647 IU_Register _rbp; | |
4648 IU_Register _rsp; | |
4649 IU_Register _rbx; | |
4650 IU_Register _rdx; | |
4651 IU_Register _rcx; | |
4652 IU_Register _rax; | |
4653 | |
4654 void print() const { | |
4655 // computation registers | |
4656 printf("rax, = "); _rax.print(); printf("\n"); | |
4657 printf("rbx, = "); _rbx.print(); printf("\n"); | |
4658 printf("rcx = "); _rcx.print(); printf("\n"); | |
4659 printf("rdx = "); _rdx.print(); printf("\n"); | |
4660 printf("rdi = "); _rdi.print(); printf("\n"); | |
4661 printf("rsi = "); _rsi.print(); printf("\n"); | |
4662 printf("rbp, = "); _rbp.print(); printf("\n"); | |
4663 printf("rsp = "); _rsp.print(); printf("\n"); | |
4664 printf("\n"); | |
4665 // control registers | |
4666 printf("flgs = "); _eflags.print(); printf("\n"); | |
4667 } | |
4668 }; | |
4669 | |
4670 | |
4671 class CPU_State { | |
4672 public: | |
4673 FPU_State _fpu_state; | |
4674 IU_State _iu_state; | |
4675 | |
4676 void print() const { | |
4677 printf("--------------------------------------------------\n"); | |
4678 _iu_state .print(); | |
4679 printf("\n"); | |
4680 _fpu_state.print(); | |
4681 printf("--------------------------------------------------\n"); | |
4682 } | |
4683 | |
4684 }; | |
4685 | |
4686 | |
4687 static void _print_CPU_state(CPU_State* state) { | |
4688 state->print(); | |
4689 }; | |
4690 | |
4691 | |
4692 void MacroAssembler::print_CPU_state() { | |
4693 push_CPU_state(); | |
4694 push(rsp); // pass CPU state | |
4695 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _print_CPU_state))); | |
4696 addptr(rsp, wordSize); // discard argument | |
4697 pop_CPU_state(); | |
4698 } | |
4699 | |
4700 | |
4701 static bool _verify_FPU(int stack_depth, char* s, CPU_State* state) { | |
4702 static int counter = 0; | |
4703 FPU_State* fs = &state->_fpu_state; | |
4704 counter++; | |
4705 // For leaf calls, only verify that the top few elements remain empty. | |
4706 // We only need 1 empty at the top for C2 code. | |
4707 if( stack_depth < 0 ) { | |
4708 if( fs->tag_for_st(7) != 3 ) { | |
4709 printf("FPR7 not empty\n"); | |
4710 state->print(); | |
4711 assert(false, "error"); | |
4712 return false; | |
4713 } | |
4714 return true; // All other stack states do not matter | |
4715 } | |
4716 | |
4717 assert((fs->_control_word._value & 0xffff) == StubRoutines::_fpu_cntrl_wrd_std, | |
4718 "bad FPU control word"); | |
4719 | |
4720 // compute stack depth | |
4721 int i = 0; | |
4722 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) < 3) i++; | |
4723 int d = i; | |
4724 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) == 3) i++; | |
4725 // verify findings | |
4726 if (i != FPU_State::number_of_registers) { | |
4727 // stack not contiguous | |
4728 printf("%s: stack not contiguous at ST%d\n", s, i); | |
4729 state->print(); | |
4730 assert(false, "error"); | |
4731 return false; | |
4732 } | |
4733 // check if computed stack depth corresponds to expected stack depth | |
4734 if (stack_depth < 0) { | |
4735 // expected stack depth is -stack_depth or less | |
4736 if (d > -stack_depth) { | |
4737 // too many elements on the stack | |
4738 printf("%s: <= %d stack elements expected but found %d\n", s, -stack_depth, d); | |
4739 state->print(); | |
4740 assert(false, "error"); | |
4741 return false; | |
4742 } | |
4743 } else { | |
4744 // expected stack depth is stack_depth | |
4745 if (d != stack_depth) { | |
4746 // wrong stack depth | |
4747 printf("%s: %d stack elements expected but found %d\n", s, stack_depth, d); | |
4748 state->print(); | |
4749 assert(false, "error"); | |
4750 return false; | |
4751 } | |
4752 } | |
4753 // everything is cool | |
4754 return true; | |
4755 } | |
4756 | |
4757 | |
4758 void MacroAssembler::verify_FPU(int stack_depth, const char* s) { | |
4759 if (!VerifyFPU) return; | |
4760 push_CPU_state(); | |
4761 push(rsp); // pass CPU state | |
4762 ExternalAddress msg((address) s); | |
4763 // pass message string s | |
4764 pushptr(msg.addr()); | |
4765 push(stack_depth); // pass stack depth | |
4766 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _verify_FPU))); | |
4767 addptr(rsp, 3 * wordSize); // discard arguments | |
4768 // check for error | |
4769 { Label L; | |
4770 testl(rax, rax); | |
4771 jcc(Assembler::notZero, L); | |
4772 int3(); // break if error condition | |
4773 bind(L); | |
4774 } | |
4775 pop_CPU_state(); | |
4776 } | |
4777 | |
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4778 void MacroAssembler::restore_cpu_control_state_after_jni() { |
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4779 // Either restore the MXCSR register after returning from the JNI Call |
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4780 // or verify that it wasn't changed (with -Xcheck:jni flag). |
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4781 if (VM_Version::supports_sse()) { |
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4782 if (RestoreMXCSROnJNICalls) { |
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4783 ldmxcsr(ExternalAddress(StubRoutines::addr_mxcsr_std())); |
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4784 } else if (CheckJNICalls) { |
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4785 call(RuntimeAddress(StubRoutines::x86::verify_mxcsr_entry())); |
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4786 } |
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4787 } |
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4788 if (VM_Version::supports_avx()) { |
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4789 // Clear upper bits of YMM registers to avoid SSE <-> AVX transition penalty. |
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4790 vzeroupper(); |
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4791 } |
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4792 |
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4793 #ifndef _LP64 |
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4794 // Either restore the x87 floating pointer control word after returning |
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4795 // from the JNI call or verify that it wasn't changed. |
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4796 if (CheckJNICalls) { |
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4797 call(RuntimeAddress(StubRoutines::x86::verify_fpu_cntrl_wrd_entry())); |
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4798 } |
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4799 #endif // _LP64 |
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4800 } |
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4801 |
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4802 |
7199 | 4803 void MacroAssembler::load_klass(Register dst, Register src) { |
4804 #ifdef _LP64 | |
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4805 if (UseCompressedClassPointers) { |
7199 | 4806 movl(dst, Address(src, oopDesc::klass_offset_in_bytes())); |
4807 decode_klass_not_null(dst); | |
4808 } else | |
4809 #endif | |
4810 movptr(dst, Address(src, oopDesc::klass_offset_in_bytes())); | |
4811 } | |
4812 | |
4813 void MacroAssembler::load_prototype_header(Register dst, Register src) { | |
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4814 load_klass(dst, src); |
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4815 movptr(dst, Address(dst, Klass::prototype_header_offset())); |
7199 | 4816 } |
4817 | |
4818 void MacroAssembler::store_klass(Register dst, Register src) { | |
4819 #ifdef _LP64 | |
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4820 if (UseCompressedClassPointers) { |
7199 | 4821 encode_klass_not_null(src); |
4822 movl(Address(dst, oopDesc::klass_offset_in_bytes()), src); | |
4823 } else | |
4824 #endif | |
4825 movptr(Address(dst, oopDesc::klass_offset_in_bytes()), src); | |
4826 } | |
4827 | |
4828 void MacroAssembler::load_heap_oop(Register dst, Address src) { | |
4829 #ifdef _LP64 | |
4830 // FIXME: Must change all places where we try to load the klass. | |
4831 if (UseCompressedOops) { | |
4832 movl(dst, src); | |
4833 decode_heap_oop(dst); | |
4834 } else | |
4835 #endif | |
4836 movptr(dst, src); | |
4837 } | |
4838 | |
4839 // Doesn't do verfication, generates fixed size code | |
4840 void MacroAssembler::load_heap_oop_not_null(Register dst, Address src) { | |
4841 #ifdef _LP64 | |
4842 if (UseCompressedOops) { | |
4843 movl(dst, src); | |
4844 decode_heap_oop_not_null(dst); | |
4845 } else | |
4846 #endif | |
4847 movptr(dst, src); | |
4848 } | |
4849 | |
4850 void MacroAssembler::store_heap_oop(Address dst, Register src) { | |
4851 #ifdef _LP64 | |
4852 if (UseCompressedOops) { | |
4853 assert(!dst.uses(src), "not enough registers"); | |
4854 encode_heap_oop(src); | |
4855 movl(dst, src); | |
4856 } else | |
4857 #endif | |
4858 movptr(dst, src); | |
4859 } | |
4860 | |
4861 void MacroAssembler::cmp_heap_oop(Register src1, Address src2, Register tmp) { | |
4862 assert_different_registers(src1, tmp); | |
4863 #ifdef _LP64 | |
4864 if (UseCompressedOops) { | |
4865 bool did_push = false; | |
4866 if (tmp == noreg) { | |
4867 tmp = rax; | |
4868 push(tmp); | |
4869 did_push = true; | |
4870 assert(!src2.uses(rsp), "can't push"); | |
4871 } | |
4872 load_heap_oop(tmp, src2); | |
4873 cmpptr(src1, tmp); | |
4874 if (did_push) pop(tmp); | |
4875 } else | |
4876 #endif | |
4877 cmpptr(src1, src2); | |
4878 } | |
4879 | |
4880 // Used for storing NULLs. | |
4881 void MacroAssembler::store_heap_oop_null(Address dst) { | |
4882 #ifdef _LP64 | |
4883 if (UseCompressedOops) { | |
4884 movl(dst, (int32_t)NULL_WORD); | |
4885 } else { | |
4886 movslq(dst, (int32_t)NULL_WORD); | |
4887 } | |
4888 #else | |
4889 movl(dst, (int32_t)NULL_WORD); | |
4890 #endif | |
4891 } | |
4892 | |
4893 #ifdef _LP64 | |
4894 void MacroAssembler::store_klass_gap(Register dst, Register src) { | |
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4895 if (UseCompressedClassPointers) { |
7199 | 4896 // Store to klass gap in destination |
4897 movl(Address(dst, oopDesc::klass_gap_offset_in_bytes()), src); | |
4898 } | |
4899 } | |
4900 | |
4901 #ifdef ASSERT | |
4902 void MacroAssembler::verify_heapbase(const char* msg) { | |
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4903 assert (UseCompressedOops, "should be compressed"); |
7199 | 4904 assert (Universe::heap() != NULL, "java heap should be initialized"); |
4905 if (CheckCompressedOops) { | |
4906 Label ok; | |
4907 push(rscratch1); // cmpptr trashes rscratch1 | |
4908 cmpptr(r12_heapbase, ExternalAddress((address)Universe::narrow_ptrs_base_addr())); | |
4909 jcc(Assembler::equal, ok); | |
4910 STOP(msg); | |
4911 bind(ok); | |
4912 pop(rscratch1); | |
4913 } | |
4914 } | |
4915 #endif | |
4916 | |
4917 // Algorithm must match oop.inline.hpp encode_heap_oop. | |
4918 void MacroAssembler::encode_heap_oop(Register r) { | |
4919 #ifdef ASSERT | |
4920 verify_heapbase("MacroAssembler::encode_heap_oop: heap base corrupted?"); | |
4921 #endif | |
4922 verify_oop(r, "broken oop in encode_heap_oop"); | |
4923 if (Universe::narrow_oop_base() == NULL) { | |
4924 if (Universe::narrow_oop_shift() != 0) { | |
4925 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
4926 shrq(r, LogMinObjAlignmentInBytes); | |
4927 } | |
4928 return; | |
4929 } | |
4930 testq(r, r); | |
4931 cmovq(Assembler::equal, r, r12_heapbase); | |
4932 subq(r, r12_heapbase); | |
4933 shrq(r, LogMinObjAlignmentInBytes); | |
4934 } | |
4935 | |
4936 void MacroAssembler::encode_heap_oop_not_null(Register r) { | |
4937 #ifdef ASSERT | |
4938 verify_heapbase("MacroAssembler::encode_heap_oop_not_null: heap base corrupted?"); | |
4939 if (CheckCompressedOops) { | |
4940 Label ok; | |
4941 testq(r, r); | |
4942 jcc(Assembler::notEqual, ok); | |
4943 STOP("null oop passed to encode_heap_oop_not_null"); | |
4944 bind(ok); | |
4945 } | |
4946 #endif | |
4947 verify_oop(r, "broken oop in encode_heap_oop_not_null"); | |
4948 if (Universe::narrow_oop_base() != NULL) { | |
4949 subq(r, r12_heapbase); | |
4950 } | |
4951 if (Universe::narrow_oop_shift() != 0) { | |
4952 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
4953 shrq(r, LogMinObjAlignmentInBytes); | |
4954 } | |
4955 } | |
4956 | |
4957 void MacroAssembler::encode_heap_oop_not_null(Register dst, Register src) { | |
4958 #ifdef ASSERT | |
4959 verify_heapbase("MacroAssembler::encode_heap_oop_not_null2: heap base corrupted?"); | |
4960 if (CheckCompressedOops) { | |
4961 Label ok; | |
4962 testq(src, src); | |
4963 jcc(Assembler::notEqual, ok); | |
4964 STOP("null oop passed to encode_heap_oop_not_null2"); | |
4965 bind(ok); | |
4966 } | |
4967 #endif | |
4968 verify_oop(src, "broken oop in encode_heap_oop_not_null2"); | |
4969 if (dst != src) { | |
4970 movq(dst, src); | |
4971 } | |
4972 if (Universe::narrow_oop_base() != NULL) { | |
4973 subq(dst, r12_heapbase); | |
4974 } | |
4975 if (Universe::narrow_oop_shift() != 0) { | |
4976 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
4977 shrq(dst, LogMinObjAlignmentInBytes); | |
4978 } | |
4979 } | |
4980 | |
4981 void MacroAssembler::decode_heap_oop(Register r) { | |
4982 #ifdef ASSERT | |
4983 verify_heapbase("MacroAssembler::decode_heap_oop: heap base corrupted?"); | |
4984 #endif | |
4985 if (Universe::narrow_oop_base() == NULL) { | |
4986 if (Universe::narrow_oop_shift() != 0) { | |
4987 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
4988 shlq(r, LogMinObjAlignmentInBytes); | |
4989 } | |
4990 } else { | |
4991 Label done; | |
4992 shlq(r, LogMinObjAlignmentInBytes); | |
4993 jccb(Assembler::equal, done); | |
4994 addq(r, r12_heapbase); | |
4995 bind(done); | |
4996 } | |
4997 verify_oop(r, "broken oop in decode_heap_oop"); | |
4998 } | |
4999 | |
5000 void MacroAssembler::decode_heap_oop_not_null(Register r) { | |
5001 // Note: it will change flags | |
5002 assert (UseCompressedOops, "should only be used for compressed headers"); | |
5003 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
5004 // Cannot assert, unverified entry point counts instructions (see .ad file) | |
5005 // vtableStubs also counts instructions in pd_code_size_limit. | |
5006 // Also do not verify_oop as this is called by verify_oop. | |
5007 if (Universe::narrow_oop_shift() != 0) { | |
5008 assert(LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
5009 shlq(r, LogMinObjAlignmentInBytes); | |
5010 if (Universe::narrow_oop_base() != NULL) { | |
5011 addq(r, r12_heapbase); | |
5012 } | |
5013 } else { | |
5014 assert (Universe::narrow_oop_base() == NULL, "sanity"); | |
5015 } | |
5016 } | |
5017 | |
5018 void MacroAssembler::decode_heap_oop_not_null(Register dst, Register src) { | |
5019 // Note: it will change flags | |
5020 assert (UseCompressedOops, "should only be used for compressed headers"); | |
5021 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
5022 // Cannot assert, unverified entry point counts instructions (see .ad file) | |
5023 // vtableStubs also counts instructions in pd_code_size_limit. | |
5024 // Also do not verify_oop as this is called by verify_oop. | |
5025 if (Universe::narrow_oop_shift() != 0) { | |
5026 assert(LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
5027 if (LogMinObjAlignmentInBytes == Address::times_8) { | |
5028 leaq(dst, Address(r12_heapbase, src, Address::times_8, 0)); | |
5029 } else { | |
5030 if (dst != src) { | |
5031 movq(dst, src); | |
5032 } | |
5033 shlq(dst, LogMinObjAlignmentInBytes); | |
5034 if (Universe::narrow_oop_base() != NULL) { | |
5035 addq(dst, r12_heapbase); | |
5036 } | |
5037 } | |
5038 } else { | |
5039 assert (Universe::narrow_oop_base() == NULL, "sanity"); | |
5040 if (dst != src) { | |
5041 movq(dst, src); | |
5042 } | |
5043 } | |
5044 } | |
5045 | |
5046 void MacroAssembler::encode_klass_not_null(Register r) { | |
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5047 assert(Universe::narrow_klass_base() != NULL, "Base should be initialized"); |
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5048 // Use r12 as a scratch register in which to temporarily load the narrow_klass_base. |
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5049 assert(r != r12_heapbase, "Encoding a klass in r12"); |
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5050 mov64(r12_heapbase, (int64_t)Universe::narrow_klass_base()); |
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5051 subq(r, r12_heapbase); |
7199 | 5052 if (Universe::narrow_klass_shift() != 0) { |
5053 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); | |
5054 shrq(r, LogKlassAlignmentInBytes); | |
5055 } | |
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5056 reinit_heapbase(); |
7199 | 5057 } |
5058 | |
5059 void MacroAssembler::encode_klass_not_null(Register dst, Register src) { | |
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5060 if (dst == src) { |
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5061 encode_klass_not_null(src); |
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5062 } else { |
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5063 mov64(dst, (int64_t)Universe::narrow_klass_base()); |
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5064 negq(dst); |
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5065 addq(dst, src); |
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5066 if (Universe::narrow_klass_shift() != 0) { |
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5067 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); |
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5068 shrq(dst, LogKlassAlignmentInBytes); |
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5069 } |
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5070 } |
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5071 } |
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5072 |
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5073 // Function instr_size_for_decode_klass_not_null() counts the instructions |
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5074 // generated by decode_klass_not_null(register r) and reinit_heapbase(), |
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5075 // when (Universe::heap() != NULL). Hence, if the instructions they |
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5076 // generate change, then this method needs to be updated. |
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5077 int MacroAssembler::instr_size_for_decode_klass_not_null() { |
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5078 assert (UseCompressedClassPointers, "only for compressed klass ptrs"); |
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5079 // mov64 + addq + shlq? + mov64 (for reinit_heapbase()). |
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5080 return (Universe::narrow_klass_shift() == 0 ? 20 : 24); |
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5081 } |
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5082 |
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5083 // !!! If the instructions that get generated here change then function |
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5084 // instr_size_for_decode_klass_not_null() needs to get updated. |
7199 | 5085 void MacroAssembler::decode_klass_not_null(Register r) { |
5086 // Note: it will change flags | |
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5087 assert(Universe::narrow_klass_base() != NULL, "Base should be initialized"); |
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5088 assert (UseCompressedClassPointers, "should only be used for compressed headers"); |
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5089 assert(r != r12_heapbase, "Decoding a klass in r12"); |
7199 | 5090 // Cannot assert, unverified entry point counts instructions (see .ad file) |
5091 // vtableStubs also counts instructions in pd_code_size_limit. | |
5092 // Also do not verify_oop as this is called by verify_oop. | |
5093 if (Universe::narrow_klass_shift() != 0) { | |
5094 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); | |
5095 shlq(r, LogKlassAlignmentInBytes); | |
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5096 } |
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5097 // Use r12 as a scratch register in which to temporarily load the narrow_klass_base. |
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5098 mov64(r12_heapbase, (int64_t)Universe::narrow_klass_base()); |
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5099 addq(r, r12_heapbase); |
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5100 reinit_heapbase(); |
7199 | 5101 } |
5102 | |
5103 void MacroAssembler::decode_klass_not_null(Register dst, Register src) { | |
5104 // Note: it will change flags | |
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5105 assert(Universe::narrow_klass_base() != NULL, "Base should be initialized"); |
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5106 assert (UseCompressedClassPointers, "should only be used for compressed headers"); |
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5107 if (dst == src) { |
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5108 decode_klass_not_null(dst); |
7199 | 5109 } else { |
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5110 // Cannot assert, unverified entry point counts instructions (see .ad file) |
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5111 // vtableStubs also counts instructions in pd_code_size_limit. |
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5112 // Also do not verify_oop as this is called by verify_oop. |
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5113 |
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5114 mov64(dst, (int64_t)Universe::narrow_klass_base()); |
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5115 if (Universe::narrow_klass_shift() != 0) { |
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5116 assert(LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); |
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5117 assert(LogKlassAlignmentInBytes == Address::times_8, "klass not aligned on 64bits?"); |
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5118 leaq(dst, Address(dst, src, Address::times_8, 0)); |
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5119 } else { |
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5120 addq(dst, src); |
7199 | 5121 } |
5122 } | |
5123 } | |
5124 | |
5125 void MacroAssembler::set_narrow_oop(Register dst, jobject obj) { | |
5126 assert (UseCompressedOops, "should only be used for compressed headers"); | |
5127 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
5128 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
5129 int oop_index = oop_recorder()->find_index(obj); | |
5130 RelocationHolder rspec = oop_Relocation::spec(oop_index); | |
5131 mov_narrow_oop(dst, oop_index, rspec); | |
5132 } | |
5133 | |
5134 void MacroAssembler::set_narrow_oop(Address dst, jobject obj) { | |
5135 assert (UseCompressedOops, "should only be used for compressed headers"); | |
5136 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
5137 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
5138 int oop_index = oop_recorder()->find_index(obj); | |
5139 RelocationHolder rspec = oop_Relocation::spec(oop_index); | |
5140 mov_narrow_oop(dst, oop_index, rspec); | |
5141 } | |
5142 | |
5143 void MacroAssembler::set_narrow_klass(Register dst, Klass* k) { | |
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|
5144 assert (UseCompressedClassPointers, "should only be used for compressed headers"); |
7199 | 5145 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); |
5146 int klass_index = oop_recorder()->find_index(k); | |
5147 RelocationHolder rspec = metadata_Relocation::spec(klass_index); | |
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5148 mov_narrow_oop(dst, Klass::encode_klass(k), rspec); |
7199 | 5149 } |
5150 | |
5151 void MacroAssembler::set_narrow_klass(Address dst, Klass* k) { | |
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|
5152 assert (UseCompressedClassPointers, "should only be used for compressed headers"); |
7199 | 5153 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); |
5154 int klass_index = oop_recorder()->find_index(k); | |
5155 RelocationHolder rspec = metadata_Relocation::spec(klass_index); | |
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5156 mov_narrow_oop(dst, Klass::encode_klass(k), rspec); |
7199 | 5157 } |
5158 | |
5159 void MacroAssembler::cmp_narrow_oop(Register dst, jobject obj) { | |
5160 assert (UseCompressedOops, "should only be used for compressed headers"); | |
5161 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
5162 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
5163 int oop_index = oop_recorder()->find_index(obj); | |
5164 RelocationHolder rspec = oop_Relocation::spec(oop_index); | |
5165 Assembler::cmp_narrow_oop(dst, oop_index, rspec); | |
5166 } | |
5167 | |
5168 void MacroAssembler::cmp_narrow_oop(Address dst, jobject obj) { | |
5169 assert (UseCompressedOops, "should only be used for compressed headers"); | |
5170 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
5171 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
5172 int oop_index = oop_recorder()->find_index(obj); | |
5173 RelocationHolder rspec = oop_Relocation::spec(oop_index); | |
5174 Assembler::cmp_narrow_oop(dst, oop_index, rspec); | |
5175 } | |
5176 | |
5177 void MacroAssembler::cmp_narrow_klass(Register dst, Klass* k) { | |
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5178 assert (UseCompressedClassPointers, "should only be used for compressed headers"); |
7199 | 5179 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); |
5180 int klass_index = oop_recorder()->find_index(k); | |
5181 RelocationHolder rspec = metadata_Relocation::spec(klass_index); | |
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5182 Assembler::cmp_narrow_oop(dst, Klass::encode_klass(k), rspec); |
7199 | 5183 } |
5184 | |
5185 void MacroAssembler::cmp_narrow_klass(Address dst, Klass* k) { | |
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|
5186 assert (UseCompressedClassPointers, "should only be used for compressed headers"); |
7199 | 5187 assert (oop_recorder() != NULL, "this assembler needs an OopRecorder"); |
5188 int klass_index = oop_recorder()->find_index(k); | |
5189 RelocationHolder rspec = metadata_Relocation::spec(klass_index); | |
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5190 Assembler::cmp_narrow_oop(dst, Klass::encode_klass(k), rspec); |
7199 | 5191 } |
5192 | |
5193 void MacroAssembler::reinit_heapbase() { | |
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5194 if (UseCompressedOops || UseCompressedClassPointers) { |
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5195 if (Universe::heap() != NULL) { |
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5196 if (Universe::narrow_oop_base() == NULL) { |
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5197 MacroAssembler::xorptr(r12_heapbase, r12_heapbase); |
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5198 } else { |
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5199 mov64(r12_heapbase, (int64_t)Universe::narrow_ptrs_base()); |
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5200 } |
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|
5201 } else { |
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5202 movptr(r12_heapbase, ExternalAddress((address)Universe::narrow_ptrs_base_addr())); |
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5203 } |
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|
5204 } |
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5205 } |
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5206 |
7199 | 5207 #endif // _LP64 |
5208 | |
5209 | |
5210 // C2 compiled method's prolog code. | |
5211 void MacroAssembler::verified_entry(int framesize, bool stack_bang, bool fp_mode_24b) { | |
5212 | |
5213 // WARNING: Initial instruction MUST be 5 bytes or longer so that | |
5214 // NativeJump::patch_verified_entry will be able to patch out the entry | |
5215 // code safely. The push to verify stack depth is ok at 5 bytes, | |
5216 // the frame allocation can be either 3 or 6 bytes. So if we don't do | |
5217 // stack bang then we must use the 6 byte frame allocation even if | |
5218 // we have no frame. :-( | |
5219 | |
5220 assert((framesize & (StackAlignmentInBytes-1)) == 0, "frame size not aligned"); | |
5221 // Remove word for return addr | |
5222 framesize -= wordSize; | |
5223 | |
5224 // Calls to C2R adapters often do not accept exceptional returns. | |
5225 // We require that their callers must bang for them. But be careful, because | |
5226 // some VM calls (such as call site linkage) can use several kilobytes of | |
5227 // stack. But the stack safety zone should account for that. | |
5228 // See bugs 4446381, 4468289, 4497237. | |
5229 if (stack_bang) { | |
5230 generate_stack_overflow_check(framesize); | |
5231 | |
5232 // We always push rbp, so that on return to interpreter rbp, will be | |
5233 // restored correctly and we can correct the stack. | |
5234 push(rbp); | |
5235 // Remove word for ebp | |
5236 framesize -= wordSize; | |
5237 | |
5238 // Create frame | |
5239 if (framesize) { | |
5240 subptr(rsp, framesize); | |
5241 } | |
5242 } else { | |
5243 // Create frame (force generation of a 4 byte immediate value) | |
5244 subptr_imm32(rsp, framesize); | |
5245 | |
5246 // Save RBP register now. | |
5247 framesize -= wordSize; | |
5248 movptr(Address(rsp, framesize), rbp); | |
5249 } | |
5250 | |
5251 if (VerifyStackAtCalls) { // Majik cookie to verify stack depth | |
5252 framesize -= wordSize; | |
5253 movptr(Address(rsp, framesize), (int32_t)0xbadb100d); | |
5254 } | |
5255 | |
5256 #ifndef _LP64 | |
5257 // If method sets FPU control word do it now | |
5258 if (fp_mode_24b) { | |
5259 fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_24())); | |
5260 } | |
5261 if (UseSSE >= 2 && VerifyFPU) { | |
5262 verify_FPU(0, "FPU stack must be clean on entry"); | |
5263 } | |
5264 #endif | |
5265 | |
5266 #ifdef ASSERT | |
5267 if (VerifyStackAtCalls) { | |
5268 Label L; | |
5269 push(rax); | |
5270 mov(rax, rsp); | |
5271 andptr(rax, StackAlignmentInBytes-1); | |
5272 cmpptr(rax, StackAlignmentInBytes-wordSize); | |
5273 pop(rax); | |
5274 jcc(Assembler::equal, L); | |
5275 STOP("Stack is not properly aligned!"); | |
5276 bind(L); | |
5277 } | |
5278 #endif | |
5279 | |
5280 } | |
5281 | |
7474
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5282 void MacroAssembler::clear_mem(Register base, Register cnt, Register tmp) { |
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5283 // cnt - number of qwords (8-byte words). |
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5284 // base - start address, qword aligned. |
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5285 assert(base==rdi, "base register must be edi for rep stos"); |
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5286 assert(tmp==rax, "tmp register must be eax for rep stos"); |
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5287 assert(cnt==rcx, "cnt register must be ecx for rep stos"); |
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5288 |
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5289 xorptr(tmp, tmp); |
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5290 if (UseFastStosb) { |
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5291 shlptr(cnt,3); // convert to number of bytes |
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5292 rep_stosb(); |
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5293 } else { |
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5294 NOT_LP64(shlptr(cnt,1);) // convert to number of dwords for 32-bit VM |
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5295 rep_stos(); |
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5296 } |
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5297 } |
7199 | 5298 |
5299 // IndexOf for constant substrings with size >= 8 chars | |
5300 // which don't need to be loaded through stack. | |
5301 void MacroAssembler::string_indexofC8(Register str1, Register str2, | |
5302 Register cnt1, Register cnt2, | |
5303 int int_cnt2, Register result, | |
5304 XMMRegister vec, Register tmp) { | |
5305 ShortBranchVerifier sbv(this); | |
5306 assert(UseSSE42Intrinsics, "SSE4.2 is required"); | |
5307 | |
5308 // This method uses pcmpestri inxtruction with bound registers | |
5309 // inputs: | |
5310 // xmm - substring | |
5311 // rax - substring length (elements count) | |
5312 // mem - scanned string | |
5313 // rdx - string length (elements count) | |
5314 // 0xd - mode: 1100 (substring search) + 01 (unsigned shorts) | |
5315 // outputs: | |
5316 // rcx - matched index in string | |
5317 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri"); | |
5318 | |
5319 Label RELOAD_SUBSTR, SCAN_TO_SUBSTR, SCAN_SUBSTR, | |
5320 RET_FOUND, RET_NOT_FOUND, EXIT, FOUND_SUBSTR, | |
5321 MATCH_SUBSTR_HEAD, RELOAD_STR, FOUND_CANDIDATE; | |
5322 | |
5323 // Note, inline_string_indexOf() generates checks: | |
5324 // if (substr.count > string.count) return -1; | |
5325 // if (substr.count == 0) return 0; | |
5326 assert(int_cnt2 >= 8, "this code isused only for cnt2 >= 8 chars"); | |
5327 | |
5328 // Load substring. | |
5329 movdqu(vec, Address(str2, 0)); | |
5330 movl(cnt2, int_cnt2); | |
5331 movptr(result, str1); // string addr | |
5332 | |
5333 if (int_cnt2 > 8) { | |
5334 jmpb(SCAN_TO_SUBSTR); | |
5335 | |
5336 // Reload substr for rescan, this code | |
5337 // is executed only for large substrings (> 8 chars) | |
5338 bind(RELOAD_SUBSTR); | |
5339 movdqu(vec, Address(str2, 0)); | |
5340 negptr(cnt2); // Jumped here with negative cnt2, convert to positive | |
5341 | |
5342 bind(RELOAD_STR); | |
5343 // We came here after the beginning of the substring was | |
5344 // matched but the rest of it was not so we need to search | |
5345 // again. Start from the next element after the previous match. | |
5346 | |
5347 // cnt2 is number of substring reminding elements and | |
5348 // cnt1 is number of string reminding elements when cmp failed. | |
5349 // Restored cnt1 = cnt1 - cnt2 + int_cnt2 | |
5350 subl(cnt1, cnt2); | |
5351 addl(cnt1, int_cnt2); | |
5352 movl(cnt2, int_cnt2); // Now restore cnt2 | |
5353 | |
5354 decrementl(cnt1); // Shift to next element | |
5355 cmpl(cnt1, cnt2); | |
5356 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring | |
5357 | |
5358 addptr(result, 2); | |
5359 | |
5360 } // (int_cnt2 > 8) | |
5361 | |
5362 // Scan string for start of substr in 16-byte vectors | |
5363 bind(SCAN_TO_SUBSTR); | |
5364 pcmpestri(vec, Address(result, 0), 0x0d); | |
5365 jccb(Assembler::below, FOUND_CANDIDATE); // CF == 1 | |
5366 subl(cnt1, 8); | |
5367 jccb(Assembler::lessEqual, RET_NOT_FOUND); // Scanned full string | |
5368 cmpl(cnt1, cnt2); | |
5369 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring | |
5370 addptr(result, 16); | |
5371 jmpb(SCAN_TO_SUBSTR); | |
5372 | |
5373 // Found a potential substr | |
5374 bind(FOUND_CANDIDATE); | |
5375 // Matched whole vector if first element matched (tmp(rcx) == 0). | |
5376 if (int_cnt2 == 8) { | |
5377 jccb(Assembler::overflow, RET_FOUND); // OF == 1 | |
5378 } else { // int_cnt2 > 8 | |
5379 jccb(Assembler::overflow, FOUND_SUBSTR); | |
5380 } | |
5381 // After pcmpestri tmp(rcx) contains matched element index | |
5382 // Compute start addr of substr | |
5383 lea(result, Address(result, tmp, Address::times_2)); | |
5384 | |
5385 // Make sure string is still long enough | |
5386 subl(cnt1, tmp); | |
5387 cmpl(cnt1, cnt2); | |
5388 if (int_cnt2 == 8) { | |
5389 jccb(Assembler::greaterEqual, SCAN_TO_SUBSTR); | |
5390 } else { // int_cnt2 > 8 | |
5391 jccb(Assembler::greaterEqual, MATCH_SUBSTR_HEAD); | |
5392 } | |
5393 // Left less then substring. | |
5394 | |
5395 bind(RET_NOT_FOUND); | |
5396 movl(result, -1); | |
5397 jmpb(EXIT); | |
5398 | |
5399 if (int_cnt2 > 8) { | |
5400 // This code is optimized for the case when whole substring | |
5401 // is matched if its head is matched. | |
5402 bind(MATCH_SUBSTR_HEAD); | |
5403 pcmpestri(vec, Address(result, 0), 0x0d); | |
5404 // Reload only string if does not match | |
5405 jccb(Assembler::noOverflow, RELOAD_STR); // OF == 0 | |
5406 | |
5407 Label CONT_SCAN_SUBSTR; | |
5408 // Compare the rest of substring (> 8 chars). | |
5409 bind(FOUND_SUBSTR); | |
5410 // First 8 chars are already matched. | |
5411 negptr(cnt2); | |
5412 addptr(cnt2, 8); | |
5413 | |
5414 bind(SCAN_SUBSTR); | |
5415 subl(cnt1, 8); | |
5416 cmpl(cnt2, -8); // Do not read beyond substring | |
5417 jccb(Assembler::lessEqual, CONT_SCAN_SUBSTR); | |
5418 // Back-up strings to avoid reading beyond substring: | |
5419 // cnt1 = cnt1 - cnt2 + 8 | |
5420 addl(cnt1, cnt2); // cnt2 is negative | |
5421 addl(cnt1, 8); | |
5422 movl(cnt2, 8); negptr(cnt2); | |
5423 bind(CONT_SCAN_SUBSTR); | |
5424 if (int_cnt2 < (int)G) { | |
5425 movdqu(vec, Address(str2, cnt2, Address::times_2, int_cnt2*2)); | |
5426 pcmpestri(vec, Address(result, cnt2, Address::times_2, int_cnt2*2), 0x0d); | |
5427 } else { | |
5428 // calculate index in register to avoid integer overflow (int_cnt2*2) | |
5429 movl(tmp, int_cnt2); | |
5430 addptr(tmp, cnt2); | |
5431 movdqu(vec, Address(str2, tmp, Address::times_2, 0)); | |
5432 pcmpestri(vec, Address(result, tmp, Address::times_2, 0), 0x0d); | |
5433 } | |
5434 // Need to reload strings pointers if not matched whole vector | |
5435 jcc(Assembler::noOverflow, RELOAD_SUBSTR); // OF == 0 | |
5436 addptr(cnt2, 8); | |
5437 jcc(Assembler::negative, SCAN_SUBSTR); | |
5438 // Fall through if found full substring | |
5439 | |
5440 } // (int_cnt2 > 8) | |
5441 | |
5442 bind(RET_FOUND); | |
5443 // Found result if we matched full small substring. | |
5444 // Compute substr offset | |
5445 subptr(result, str1); | |
5446 shrl(result, 1); // index | |
5447 bind(EXIT); | |
5448 | |
5449 } // string_indexofC8 | |
5450 | |
5451 // Small strings are loaded through stack if they cross page boundary. | |
5452 void MacroAssembler::string_indexof(Register str1, Register str2, | |
5453 Register cnt1, Register cnt2, | |
5454 int int_cnt2, Register result, | |
5455 XMMRegister vec, Register tmp) { | |
5456 ShortBranchVerifier sbv(this); | |
5457 assert(UseSSE42Intrinsics, "SSE4.2 is required"); | |
5458 // | |
5459 // int_cnt2 is length of small (< 8 chars) constant substring | |
5460 // or (-1) for non constant substring in which case its length | |
5461 // is in cnt2 register. | |
5462 // | |
5463 // Note, inline_string_indexOf() generates checks: | |
5464 // if (substr.count > string.count) return -1; | |
5465 // if (substr.count == 0) return 0; | |
5466 // | |
5467 assert(int_cnt2 == -1 || (0 < int_cnt2 && int_cnt2 < 8), "should be != 0"); | |
5468 | |
5469 // This method uses pcmpestri inxtruction with bound registers | |
5470 // inputs: | |
5471 // xmm - substring | |
5472 // rax - substring length (elements count) | |
5473 // mem - scanned string | |
5474 // rdx - string length (elements count) | |
5475 // 0xd - mode: 1100 (substring search) + 01 (unsigned shorts) | |
5476 // outputs: | |
5477 // rcx - matched index in string | |
5478 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri"); | |
5479 | |
5480 Label RELOAD_SUBSTR, SCAN_TO_SUBSTR, SCAN_SUBSTR, ADJUST_STR, | |
5481 RET_FOUND, RET_NOT_FOUND, CLEANUP, FOUND_SUBSTR, | |
5482 FOUND_CANDIDATE; | |
5483 | |
5484 { //======================================================== | |
5485 // We don't know where these strings are located | |
5486 // and we can't read beyond them. Load them through stack. | |
5487 Label BIG_STRINGS, CHECK_STR, COPY_SUBSTR, COPY_STR; | |
5488 | |
5489 movptr(tmp, rsp); // save old SP | |
5490 | |
5491 if (int_cnt2 > 0) { // small (< 8 chars) constant substring | |
5492 if (int_cnt2 == 1) { // One char | |
5493 load_unsigned_short(result, Address(str2, 0)); | |
5494 movdl(vec, result); // move 32 bits | |
5495 } else if (int_cnt2 == 2) { // Two chars | |
5496 movdl(vec, Address(str2, 0)); // move 32 bits | |
5497 } else if (int_cnt2 == 4) { // Four chars | |
5498 movq(vec, Address(str2, 0)); // move 64 bits | |
5499 } else { // cnt2 = { 3, 5, 6, 7 } | |
5500 // Array header size is 12 bytes in 32-bit VM | |
5501 // + 6 bytes for 3 chars == 18 bytes, | |
5502 // enough space to load vec and shift. | |
5503 assert(HeapWordSize*TypeArrayKlass::header_size() >= 12,"sanity"); | |
5504 movdqu(vec, Address(str2, (int_cnt2*2)-16)); | |
5505 psrldq(vec, 16-(int_cnt2*2)); | |
5506 } | |
5507 } else { // not constant substring | |
5508 cmpl(cnt2, 8); | |
5509 jccb(Assembler::aboveEqual, BIG_STRINGS); // Both strings are big enough | |
5510 | |
5511 // We can read beyond string if srt+16 does not cross page boundary | |
5512 // since heaps are aligned and mapped by pages. | |
5513 assert(os::vm_page_size() < (int)G, "default page should be small"); | |
5514 movl(result, str2); // We need only low 32 bits | |
5515 andl(result, (os::vm_page_size()-1)); | |
5516 cmpl(result, (os::vm_page_size()-16)); | |
5517 jccb(Assembler::belowEqual, CHECK_STR); | |
5518 | |
5519 // Move small strings to stack to allow load 16 bytes into vec. | |
5520 subptr(rsp, 16); | |
5521 int stk_offset = wordSize-2; | |
5522 push(cnt2); | |
5523 | |
5524 bind(COPY_SUBSTR); | |
5525 load_unsigned_short(result, Address(str2, cnt2, Address::times_2, -2)); | |
5526 movw(Address(rsp, cnt2, Address::times_2, stk_offset), result); | |
5527 decrement(cnt2); | |
5528 jccb(Assembler::notZero, COPY_SUBSTR); | |
5529 | |
5530 pop(cnt2); | |
5531 movptr(str2, rsp); // New substring address | |
5532 } // non constant | |
5533 | |
5534 bind(CHECK_STR); | |
5535 cmpl(cnt1, 8); | |
5536 jccb(Assembler::aboveEqual, BIG_STRINGS); | |
5537 | |
5538 // Check cross page boundary. | |
5539 movl(result, str1); // We need only low 32 bits | |
5540 andl(result, (os::vm_page_size()-1)); | |
5541 cmpl(result, (os::vm_page_size()-16)); | |
5542 jccb(Assembler::belowEqual, BIG_STRINGS); | |
5543 | |
5544 subptr(rsp, 16); | |
5545 int stk_offset = -2; | |
5546 if (int_cnt2 < 0) { // not constant | |
5547 push(cnt2); | |
5548 stk_offset += wordSize; | |
5549 } | |
5550 movl(cnt2, cnt1); | |
5551 | |
5552 bind(COPY_STR); | |
5553 load_unsigned_short(result, Address(str1, cnt2, Address::times_2, -2)); | |
5554 movw(Address(rsp, cnt2, Address::times_2, stk_offset), result); | |
5555 decrement(cnt2); | |
5556 jccb(Assembler::notZero, COPY_STR); | |
5557 | |
5558 if (int_cnt2 < 0) { // not constant | |
5559 pop(cnt2); | |
5560 } | |
5561 movptr(str1, rsp); // New string address | |
5562 | |
5563 bind(BIG_STRINGS); | |
5564 // Load substring. | |
5565 if (int_cnt2 < 0) { // -1 | |
5566 movdqu(vec, Address(str2, 0)); | |
5567 push(cnt2); // substr count | |
5568 push(str2); // substr addr | |
5569 push(str1); // string addr | |
5570 } else { | |
5571 // Small (< 8 chars) constant substrings are loaded already. | |
5572 movl(cnt2, int_cnt2); | |
5573 } | |
5574 push(tmp); // original SP | |
5575 | |
5576 } // Finished loading | |
5577 | |
5578 //======================================================== | |
5579 // Start search | |
5580 // | |
5581 | |
5582 movptr(result, str1); // string addr | |
5583 | |
5584 if (int_cnt2 < 0) { // Only for non constant substring | |
5585 jmpb(SCAN_TO_SUBSTR); | |
5586 | |
5587 // SP saved at sp+0 | |
5588 // String saved at sp+1*wordSize | |
5589 // Substr saved at sp+2*wordSize | |
5590 // Substr count saved at sp+3*wordSize | |
5591 | |
5592 // Reload substr for rescan, this code | |
5593 // is executed only for large substrings (> 8 chars) | |
5594 bind(RELOAD_SUBSTR); | |
5595 movptr(str2, Address(rsp, 2*wordSize)); | |
5596 movl(cnt2, Address(rsp, 3*wordSize)); | |
5597 movdqu(vec, Address(str2, 0)); | |
5598 // We came here after the beginning of the substring was | |
5599 // matched but the rest of it was not so we need to search | |
5600 // again. Start from the next element after the previous match. | |
5601 subptr(str1, result); // Restore counter | |
5602 shrl(str1, 1); | |
5603 addl(cnt1, str1); | |
5604 decrementl(cnt1); // Shift to next element | |
5605 cmpl(cnt1, cnt2); | |
5606 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring | |
5607 | |
5608 addptr(result, 2); | |
5609 } // non constant | |
5610 | |
5611 // Scan string for start of substr in 16-byte vectors | |
5612 bind(SCAN_TO_SUBSTR); | |
5613 assert(cnt1 == rdx && cnt2 == rax && tmp == rcx, "pcmpestri"); | |
5614 pcmpestri(vec, Address(result, 0), 0x0d); | |
5615 jccb(Assembler::below, FOUND_CANDIDATE); // CF == 1 | |
5616 subl(cnt1, 8); | |
5617 jccb(Assembler::lessEqual, RET_NOT_FOUND); // Scanned full string | |
5618 cmpl(cnt1, cnt2); | |
5619 jccb(Assembler::negative, RET_NOT_FOUND); // Left less then substring | |
5620 addptr(result, 16); | |
5621 | |
5622 bind(ADJUST_STR); | |
5623 cmpl(cnt1, 8); // Do not read beyond string | |
5624 jccb(Assembler::greaterEqual, SCAN_TO_SUBSTR); | |
5625 // Back-up string to avoid reading beyond string. | |
5626 lea(result, Address(result, cnt1, Address::times_2, -16)); | |
5627 movl(cnt1, 8); | |
5628 jmpb(SCAN_TO_SUBSTR); | |
5629 | |
5630 // Found a potential substr | |
5631 bind(FOUND_CANDIDATE); | |
5632 // After pcmpestri tmp(rcx) contains matched element index | |
5633 | |
5634 // Make sure string is still long enough | |
5635 subl(cnt1, tmp); | |
5636 cmpl(cnt1, cnt2); | |
5637 jccb(Assembler::greaterEqual, FOUND_SUBSTR); | |
5638 // Left less then substring. | |
5639 | |
5640 bind(RET_NOT_FOUND); | |
5641 movl(result, -1); | |
5642 jmpb(CLEANUP); | |
5643 | |
5644 bind(FOUND_SUBSTR); | |
5645 // Compute start addr of substr | |
5646 lea(result, Address(result, tmp, Address::times_2)); | |
5647 | |
5648 if (int_cnt2 > 0) { // Constant substring | |
5649 // Repeat search for small substring (< 8 chars) | |
5650 // from new point without reloading substring. | |
5651 // Have to check that we don't read beyond string. | |
5652 cmpl(tmp, 8-int_cnt2); | |
5653 jccb(Assembler::greater, ADJUST_STR); | |
5654 // Fall through if matched whole substring. | |
5655 } else { // non constant | |
5656 assert(int_cnt2 == -1, "should be != 0"); | |
5657 | |
5658 addl(tmp, cnt2); | |
5659 // Found result if we matched whole substring. | |
5660 cmpl(tmp, 8); | |
5661 jccb(Assembler::lessEqual, RET_FOUND); | |
5662 | |
5663 // Repeat search for small substring (<= 8 chars) | |
5664 // from new point 'str1' without reloading substring. | |
5665 cmpl(cnt2, 8); | |
5666 // Have to check that we don't read beyond string. | |
5667 jccb(Assembler::lessEqual, ADJUST_STR); | |
5668 | |
5669 Label CHECK_NEXT, CONT_SCAN_SUBSTR, RET_FOUND_LONG; | |
5670 // Compare the rest of substring (> 8 chars). | |
5671 movptr(str1, result); | |
5672 | |
5673 cmpl(tmp, cnt2); | |
5674 // First 8 chars are already matched. | |
5675 jccb(Assembler::equal, CHECK_NEXT); | |
5676 | |
5677 bind(SCAN_SUBSTR); | |
5678 pcmpestri(vec, Address(str1, 0), 0x0d); | |
5679 // Need to reload strings pointers if not matched whole vector | |
5680 jcc(Assembler::noOverflow, RELOAD_SUBSTR); // OF == 0 | |
5681 | |
5682 bind(CHECK_NEXT); | |
5683 subl(cnt2, 8); | |
5684 jccb(Assembler::lessEqual, RET_FOUND_LONG); // Found full substring | |
5685 addptr(str1, 16); | |
5686 addptr(str2, 16); | |
5687 subl(cnt1, 8); | |
5688 cmpl(cnt2, 8); // Do not read beyond substring | |
5689 jccb(Assembler::greaterEqual, CONT_SCAN_SUBSTR); | |
5690 // Back-up strings to avoid reading beyond substring. | |
5691 lea(str2, Address(str2, cnt2, Address::times_2, -16)); | |
5692 lea(str1, Address(str1, cnt2, Address::times_2, -16)); | |
5693 subl(cnt1, cnt2); | |
5694 movl(cnt2, 8); | |
5695 addl(cnt1, 8); | |
5696 bind(CONT_SCAN_SUBSTR); | |
5697 movdqu(vec, Address(str2, 0)); | |
5698 jmpb(SCAN_SUBSTR); | |
5699 | |
5700 bind(RET_FOUND_LONG); | |
5701 movptr(str1, Address(rsp, wordSize)); | |
5702 } // non constant | |
5703 | |
5704 bind(RET_FOUND); | |
5705 // Compute substr offset | |
5706 subptr(result, str1); | |
5707 shrl(result, 1); // index | |
5708 | |
5709 bind(CLEANUP); | |
5710 pop(rsp); // restore SP | |
5711 | |
5712 } // string_indexof | |
5713 | |
5714 // Compare strings. | |
5715 void MacroAssembler::string_compare(Register str1, Register str2, | |
5716 Register cnt1, Register cnt2, Register result, | |
5717 XMMRegister vec1) { | |
5718 ShortBranchVerifier sbv(this); | |
5719 Label LENGTH_DIFF_LABEL, POP_LABEL, DONE_LABEL, WHILE_HEAD_LABEL; | |
5720 | |
5721 // Compute the minimum of the string lengths and the | |
5722 // difference of the string lengths (stack). | |
5723 // Do the conditional move stuff | |
5724 movl(result, cnt1); | |
5725 subl(cnt1, cnt2); | |
5726 push(cnt1); | |
5727 cmov32(Assembler::lessEqual, cnt2, result); | |
5728 | |
5729 // Is the minimum length zero? | |
5730 testl(cnt2, cnt2); | |
5731 jcc(Assembler::zero, LENGTH_DIFF_LABEL); | |
5732 | |
7477
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5733 // Compare first characters |
7199 | 5734 load_unsigned_short(result, Address(str1, 0)); |
5735 load_unsigned_short(cnt1, Address(str2, 0)); | |
5736 subl(result, cnt1); | |
5737 jcc(Assembler::notZero, POP_LABEL); | |
7477
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5738 cmpl(cnt2, 1); |
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5739 jcc(Assembler::equal, LENGTH_DIFF_LABEL); |
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5740 |
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|
5741 // Check if the strings start at the same location. |
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5742 cmpptr(str1, str2); |
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|
5743 jcc(Assembler::equal, LENGTH_DIFF_LABEL); |
7199 | 5744 |
5745 Address::ScaleFactor scale = Address::times_2; | |
5746 int stride = 8; | |
5747 | |
8042
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|
5748 if (UseAVX >= 2 && UseSSE42Intrinsics) { |
7477
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5749 Label COMPARE_WIDE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_WIDE_TAIL, COMPARE_SMALL_STR; |
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5750 Label COMPARE_WIDE_VECTORS_LOOP, COMPARE_16_CHARS, COMPARE_INDEX_CHAR; |
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5751 Label COMPARE_TAIL_LONG; |
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5752 int pcmpmask = 0x19; |
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5753 |
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5754 // Setup to compare 16-chars (32-bytes) vectors, |
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5755 // start from first character again because it has aligned address. |
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5756 int stride2 = 16; |
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5757 int adr_stride = stride << scale; |
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5758 int adr_stride2 = stride2 << scale; |
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5759 |
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5760 assert(result == rax && cnt2 == rdx && cnt1 == rcx, "pcmpestri"); |
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5761 // rax and rdx are used by pcmpestri as elements counters |
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5762 movl(result, cnt2); |
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5763 andl(cnt2, ~(stride2-1)); // cnt2 holds the vector count |
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5764 jcc(Assembler::zero, COMPARE_TAIL_LONG); |
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5765 |
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|
5766 // fast path : compare first 2 8-char vectors. |
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|
5767 bind(COMPARE_16_CHARS); |
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|
5768 movdqu(vec1, Address(str1, 0)); |
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5769 pcmpestri(vec1, Address(str2, 0), pcmpmask); |
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5770 jccb(Assembler::below, COMPARE_INDEX_CHAR); |
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|
5771 |
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|
5772 movdqu(vec1, Address(str1, adr_stride)); |
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5773 pcmpestri(vec1, Address(str2, adr_stride), pcmpmask); |
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5774 jccb(Assembler::aboveEqual, COMPARE_WIDE_VECTORS); |
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|
5775 addl(cnt1, stride); |
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|
5776 |
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|
5777 // Compare the characters at index in cnt1 |
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|
5778 bind(COMPARE_INDEX_CHAR); //cnt1 has the offset of the mismatching character |
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5779 load_unsigned_short(result, Address(str1, cnt1, scale)); |
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5780 load_unsigned_short(cnt2, Address(str2, cnt1, scale)); |
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|
5781 subl(result, cnt2); |
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|
5782 jmp(POP_LABEL); |
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|
5783 |
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5784 // Setup the registers to start vector comparison loop |
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|
5785 bind(COMPARE_WIDE_VECTORS); |
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|
5786 lea(str1, Address(str1, result, scale)); |
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5787 lea(str2, Address(str2, result, scale)); |
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5788 subl(result, stride2); |
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|
5789 subl(cnt2, stride2); |
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5790 jccb(Assembler::zero, COMPARE_WIDE_TAIL); |
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|
5791 negptr(result); |
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|
5792 |
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|
5793 // In a loop, compare 16-chars (32-bytes) at once using (vpxor+vptest) |
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5794 bind(COMPARE_WIDE_VECTORS_LOOP); |
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5795 vmovdqu(vec1, Address(str1, result, scale)); |
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5796 vpxor(vec1, Address(str2, result, scale)); |
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|
5797 vptest(vec1, vec1); |
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|
5798 jccb(Assembler::notZero, VECTOR_NOT_EQUAL); |
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|
5799 addptr(result, stride2); |
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|
5800 subl(cnt2, stride2); |
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|
5801 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS_LOOP); |
8873
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|
5802 // clean upper bits of YMM registers |
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|
5803 vzeroupper(); |
7477
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|
5804 |
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|
5805 // compare wide vectors tail |
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|
5806 bind(COMPARE_WIDE_TAIL); |
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|
5807 testptr(result, result); |
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|
5808 jccb(Assembler::zero, LENGTH_DIFF_LABEL); |
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|
5809 |
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|
5810 movl(result, stride2); |
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|
5811 movl(cnt2, result); |
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|
5812 negptr(result); |
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|
5813 jmpb(COMPARE_WIDE_VECTORS_LOOP); |
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|
5814 |
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|
5815 // Identifies the mismatching (higher or lower)16-bytes in the 32-byte vectors. |
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5816 bind(VECTOR_NOT_EQUAL); |
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|
5817 // clean upper bits of YMM registers |
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|
5818 vzeroupper(); |
7477
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|
5819 lea(str1, Address(str1, result, scale)); |
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|
5820 lea(str2, Address(str2, result, scale)); |
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5821 jmp(COMPARE_16_CHARS); |
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|
5822 |
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5823 // Compare tail chars, length between 1 to 15 chars |
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|
5824 bind(COMPARE_TAIL_LONG); |
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|
5825 movl(cnt2, result); |
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|
5826 cmpl(cnt2, stride); |
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|
5827 jccb(Assembler::less, COMPARE_SMALL_STR); |
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|
5828 |
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|
5829 movdqu(vec1, Address(str1, 0)); |
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|
5830 pcmpestri(vec1, Address(str2, 0), pcmpmask); |
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|
5831 jcc(Assembler::below, COMPARE_INDEX_CHAR); |
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|
5832 subptr(cnt2, stride); |
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|
5833 jccb(Assembler::zero, LENGTH_DIFF_LABEL); |
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|
5834 lea(str1, Address(str1, result, scale)); |
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|
5835 lea(str2, Address(str2, result, scale)); |
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|
5836 negptr(cnt2); |
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|
5837 jmpb(WHILE_HEAD_LABEL); |
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|
5838 |
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|
5839 bind(COMPARE_SMALL_STR); |
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|
5840 } else if (UseSSE42Intrinsics) { |
7199 | 5841 Label COMPARE_WIDE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_TAIL; |
5842 int pcmpmask = 0x19; | |
7477
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|
5843 // Setup to compare 8-char (16-byte) vectors, |
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|
5844 // start from first character again because it has aligned address. |
7199 | 5845 movl(result, cnt2); |
5846 andl(cnt2, ~(stride - 1)); // cnt2 holds the vector count | |
5847 jccb(Assembler::zero, COMPARE_TAIL); | |
5848 | |
5849 lea(str1, Address(str1, result, scale)); | |
5850 lea(str2, Address(str2, result, scale)); | |
5851 negptr(result); | |
5852 | |
5853 // pcmpestri | |
5854 // inputs: | |
5855 // vec1- substring | |
5856 // rax - negative string length (elements count) | |
5857 // mem - scaned string | |
5858 // rdx - string length (elements count) | |
5859 // pcmpmask - cmp mode: 11000 (string compare with negated result) | |
5860 // + 00 (unsigned bytes) or + 01 (unsigned shorts) | |
5861 // outputs: | |
5862 // rcx - first mismatched element index | |
5863 assert(result == rax && cnt2 == rdx && cnt1 == rcx, "pcmpestri"); | |
5864 | |
5865 bind(COMPARE_WIDE_VECTORS); | |
5866 movdqu(vec1, Address(str1, result, scale)); | |
5867 pcmpestri(vec1, Address(str2, result, scale), pcmpmask); | |
5868 // After pcmpestri cnt1(rcx) contains mismatched element index | |
5869 | |
5870 jccb(Assembler::below, VECTOR_NOT_EQUAL); // CF==1 | |
5871 addptr(result, stride); | |
5872 subptr(cnt2, stride); | |
5873 jccb(Assembler::notZero, COMPARE_WIDE_VECTORS); | |
5874 | |
5875 // compare wide vectors tail | |
7477
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|
5876 testptr(result, result); |
7199 | 5877 jccb(Assembler::zero, LENGTH_DIFF_LABEL); |
5878 | |
5879 movl(cnt2, stride); | |
5880 movl(result, stride); | |
5881 negptr(result); | |
5882 movdqu(vec1, Address(str1, result, scale)); | |
5883 pcmpestri(vec1, Address(str2, result, scale), pcmpmask); | |
5884 jccb(Assembler::aboveEqual, LENGTH_DIFF_LABEL); | |
5885 | |
5886 // Mismatched characters in the vectors | |
5887 bind(VECTOR_NOT_EQUAL); | |
7477
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|
5888 addptr(cnt1, result); |
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5889 load_unsigned_short(result, Address(str1, cnt1, scale)); |
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5890 load_unsigned_short(cnt2, Address(str2, cnt1, scale)); |
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5891 subl(result, cnt2); |
7199 | 5892 jmpb(POP_LABEL); |
5893 | |
5894 bind(COMPARE_TAIL); // limit is zero | |
5895 movl(cnt2, result); | |
5896 // Fallthru to tail compare | |
5897 } | |
5898 // Shift str2 and str1 to the end of the arrays, negate min | |
7477
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5899 lea(str1, Address(str1, cnt2, scale)); |
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5900 lea(str2, Address(str2, cnt2, scale)); |
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5901 decrementl(cnt2); // first character was compared already |
7199 | 5902 negptr(cnt2); |
5903 | |
5904 // Compare the rest of the elements | |
5905 bind(WHILE_HEAD_LABEL); | |
5906 load_unsigned_short(result, Address(str1, cnt2, scale, 0)); | |
5907 load_unsigned_short(cnt1, Address(str2, cnt2, scale, 0)); | |
5908 subl(result, cnt1); | |
5909 jccb(Assembler::notZero, POP_LABEL); | |
5910 increment(cnt2); | |
5911 jccb(Assembler::notZero, WHILE_HEAD_LABEL); | |
5912 | |
5913 // Strings are equal up to min length. Return the length difference. | |
5914 bind(LENGTH_DIFF_LABEL); | |
5915 pop(result); | |
5916 jmpb(DONE_LABEL); | |
5917 | |
5918 // Discard the stored length difference | |
5919 bind(POP_LABEL); | |
5920 pop(cnt1); | |
5921 | |
5922 // That's it | |
5923 bind(DONE_LABEL); | |
5924 } | |
5925 | |
5926 // Compare char[] arrays aligned to 4 bytes or substrings. | |
5927 void MacroAssembler::char_arrays_equals(bool is_array_equ, Register ary1, Register ary2, | |
5928 Register limit, Register result, Register chr, | |
5929 XMMRegister vec1, XMMRegister vec2) { | |
5930 ShortBranchVerifier sbv(this); | |
5931 Label TRUE_LABEL, FALSE_LABEL, DONE, COMPARE_VECTORS, COMPARE_CHAR; | |
5932 | |
5933 int length_offset = arrayOopDesc::length_offset_in_bytes(); | |
5934 int base_offset = arrayOopDesc::base_offset_in_bytes(T_CHAR); | |
5935 | |
5936 // Check the input args | |
5937 cmpptr(ary1, ary2); | |
5938 jcc(Assembler::equal, TRUE_LABEL); | |
5939 | |
5940 if (is_array_equ) { | |
5941 // Need additional checks for arrays_equals. | |
5942 testptr(ary1, ary1); | |
5943 jcc(Assembler::zero, FALSE_LABEL); | |
5944 testptr(ary2, ary2); | |
5945 jcc(Assembler::zero, FALSE_LABEL); | |
5946 | |
5947 // Check the lengths | |
5948 movl(limit, Address(ary1, length_offset)); | |
5949 cmpl(limit, Address(ary2, length_offset)); | |
5950 jcc(Assembler::notEqual, FALSE_LABEL); | |
5951 } | |
5952 | |
5953 // count == 0 | |
5954 testl(limit, limit); | |
5955 jcc(Assembler::zero, TRUE_LABEL); | |
5956 | |
5957 if (is_array_equ) { | |
5958 // Load array address | |
5959 lea(ary1, Address(ary1, base_offset)); | |
5960 lea(ary2, Address(ary2, base_offset)); | |
5961 } | |
5962 | |
5963 shll(limit, 1); // byte count != 0 | |
5964 movl(result, limit); // copy | |
5965 | |
7477
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5966 if (UseAVX >= 2) { |
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5967 // With AVX2, use 32-byte vector compare |
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5968 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL; |
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5969 |
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5970 // Compare 32-byte vectors |
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5971 andl(result, 0x0000001e); // tail count (in bytes) |
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5972 andl(limit, 0xffffffe0); // vector count (in bytes) |
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5973 jccb(Assembler::zero, COMPARE_TAIL); |
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5974 |
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5975 lea(ary1, Address(ary1, limit, Address::times_1)); |
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5976 lea(ary2, Address(ary2, limit, Address::times_1)); |
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5977 negptr(limit); |
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5978 |
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5979 bind(COMPARE_WIDE_VECTORS); |
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5980 vmovdqu(vec1, Address(ary1, limit, Address::times_1)); |
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5981 vmovdqu(vec2, Address(ary2, limit, Address::times_1)); |
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5982 vpxor(vec1, vec2); |
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5983 |
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5984 vptest(vec1, vec1); |
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5985 jccb(Assembler::notZero, FALSE_LABEL); |
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5986 addptr(limit, 32); |
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5987 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS); |
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5988 |
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5989 testl(result, result); |
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5990 jccb(Assembler::zero, TRUE_LABEL); |
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5991 |
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5992 vmovdqu(vec1, Address(ary1, result, Address::times_1, -32)); |
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5993 vmovdqu(vec2, Address(ary2, result, Address::times_1, -32)); |
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5994 vpxor(vec1, vec2); |
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5995 |
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5996 vptest(vec1, vec1); |
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5997 jccb(Assembler::notZero, FALSE_LABEL); |
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5998 jmpb(TRUE_LABEL); |
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5999 |
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6000 bind(COMPARE_TAIL); // limit is zero |
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6001 movl(limit, result); |
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6002 // Fallthru to tail compare |
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6003 } else if (UseSSE42Intrinsics) { |
7199 | 6004 // With SSE4.2, use double quad vector compare |
6005 Label COMPARE_WIDE_VECTORS, COMPARE_TAIL; | |
6006 | |
6007 // Compare 16-byte vectors | |
6008 andl(result, 0x0000000e); // tail count (in bytes) | |
6009 andl(limit, 0xfffffff0); // vector count (in bytes) | |
6010 jccb(Assembler::zero, COMPARE_TAIL); | |
6011 | |
6012 lea(ary1, Address(ary1, limit, Address::times_1)); | |
6013 lea(ary2, Address(ary2, limit, Address::times_1)); | |
6014 negptr(limit); | |
6015 | |
6016 bind(COMPARE_WIDE_VECTORS); | |
6017 movdqu(vec1, Address(ary1, limit, Address::times_1)); | |
6018 movdqu(vec2, Address(ary2, limit, Address::times_1)); | |
6019 pxor(vec1, vec2); | |
6020 | |
6021 ptest(vec1, vec1); | |
6022 jccb(Assembler::notZero, FALSE_LABEL); | |
6023 addptr(limit, 16); | |
6024 jcc(Assembler::notZero, COMPARE_WIDE_VECTORS); | |
6025 | |
6026 testl(result, result); | |
6027 jccb(Assembler::zero, TRUE_LABEL); | |
6028 | |
6029 movdqu(vec1, Address(ary1, result, Address::times_1, -16)); | |
6030 movdqu(vec2, Address(ary2, result, Address::times_1, -16)); | |
6031 pxor(vec1, vec2); | |
6032 | |
6033 ptest(vec1, vec1); | |
6034 jccb(Assembler::notZero, FALSE_LABEL); | |
6035 jmpb(TRUE_LABEL); | |
6036 | |
6037 bind(COMPARE_TAIL); // limit is zero | |
6038 movl(limit, result); | |
6039 // Fallthru to tail compare | |
6040 } | |
6041 | |
6042 // Compare 4-byte vectors | |
6043 andl(limit, 0xfffffffc); // vector count (in bytes) | |
6044 jccb(Assembler::zero, COMPARE_CHAR); | |
6045 | |
6046 lea(ary1, Address(ary1, limit, Address::times_1)); | |
6047 lea(ary2, Address(ary2, limit, Address::times_1)); | |
6048 negptr(limit); | |
6049 | |
6050 bind(COMPARE_VECTORS); | |
6051 movl(chr, Address(ary1, limit, Address::times_1)); | |
6052 cmpl(chr, Address(ary2, limit, Address::times_1)); | |
6053 jccb(Assembler::notEqual, FALSE_LABEL); | |
6054 addptr(limit, 4); | |
6055 jcc(Assembler::notZero, COMPARE_VECTORS); | |
6056 | |
6057 // Compare trailing char (final 2 bytes), if any | |
6058 bind(COMPARE_CHAR); | |
6059 testl(result, 0x2); // tail char | |
6060 jccb(Assembler::zero, TRUE_LABEL); | |
6061 load_unsigned_short(chr, Address(ary1, 0)); | |
6062 load_unsigned_short(limit, Address(ary2, 0)); | |
6063 cmpl(chr, limit); | |
6064 jccb(Assembler::notEqual, FALSE_LABEL); | |
6065 | |
6066 bind(TRUE_LABEL); | |
6067 movl(result, 1); // return true | |
6068 jmpb(DONE); | |
6069 | |
6070 bind(FALSE_LABEL); | |
6071 xorl(result, result); // return false | |
6072 | |
6073 // That's it | |
6074 bind(DONE); | |
8873
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6075 if (UseAVX >= 2) { |
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6076 // clean upper bits of YMM registers |
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6077 vzeroupper(); |
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6078 } |
7199 | 6079 } |
6080 | |
6081 void MacroAssembler::generate_fill(BasicType t, bool aligned, | |
6082 Register to, Register value, Register count, | |
6083 Register rtmp, XMMRegister xtmp) { | |
6084 ShortBranchVerifier sbv(this); | |
6085 assert_different_registers(to, value, count, rtmp); | |
6086 Label L_exit, L_skip_align1, L_skip_align2, L_fill_byte; | |
6087 Label L_fill_2_bytes, L_fill_4_bytes; | |
6088 | |
6089 int shift = -1; | |
6090 switch (t) { | |
6091 case T_BYTE: | |
6092 shift = 2; | |
6093 break; | |
6094 case T_SHORT: | |
6095 shift = 1; | |
6096 break; | |
6097 case T_INT: | |
6098 shift = 0; | |
6099 break; | |
6100 default: ShouldNotReachHere(); | |
6101 } | |
6102 | |
6103 if (t == T_BYTE) { | |
6104 andl(value, 0xff); | |
6105 movl(rtmp, value); | |
6106 shll(rtmp, 8); | |
6107 orl(value, rtmp); | |
6108 } | |
6109 if (t == T_SHORT) { | |
6110 andl(value, 0xffff); | |
6111 } | |
6112 if (t == T_BYTE || t == T_SHORT) { | |
6113 movl(rtmp, value); | |
6114 shll(rtmp, 16); | |
6115 orl(value, rtmp); | |
6116 } | |
6117 | |
6118 cmpl(count, 2<<shift); // Short arrays (< 8 bytes) fill by element | |
6119 jcc(Assembler::below, L_fill_4_bytes); // use unsigned cmp | |
6120 if (!UseUnalignedLoadStores && !aligned && (t == T_BYTE || t == T_SHORT)) { | |
6121 // align source address at 4 bytes address boundary | |
6122 if (t == T_BYTE) { | |
6123 // One byte misalignment happens only for byte arrays | |
6124 testptr(to, 1); | |
6125 jccb(Assembler::zero, L_skip_align1); | |
6126 movb(Address(to, 0), value); | |
6127 increment(to); | |
6128 decrement(count); | |
6129 BIND(L_skip_align1); | |
6130 } | |
6131 // Two bytes misalignment happens only for byte and short (char) arrays | |
6132 testptr(to, 2); | |
6133 jccb(Assembler::zero, L_skip_align2); | |
6134 movw(Address(to, 0), value); | |
6135 addptr(to, 2); | |
6136 subl(count, 1<<(shift-1)); | |
6137 BIND(L_skip_align2); | |
6138 } | |
6139 if (UseSSE < 2) { | |
6140 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes; | |
6141 // Fill 32-byte chunks | |
6142 subl(count, 8 << shift); | |
6143 jcc(Assembler::less, L_check_fill_8_bytes); | |
6144 align(16); | |
6145 | |
6146 BIND(L_fill_32_bytes_loop); | |
6147 | |
6148 for (int i = 0; i < 32; i += 4) { | |
6149 movl(Address(to, i), value); | |
6150 } | |
6151 | |
6152 addptr(to, 32); | |
6153 subl(count, 8 << shift); | |
6154 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop); | |
6155 BIND(L_check_fill_8_bytes); | |
6156 addl(count, 8 << shift); | |
6157 jccb(Assembler::zero, L_exit); | |
6158 jmpb(L_fill_8_bytes); | |
6159 | |
6160 // | |
6161 // length is too short, just fill qwords | |
6162 // | |
6163 BIND(L_fill_8_bytes_loop); | |
6164 movl(Address(to, 0), value); | |
6165 movl(Address(to, 4), value); | |
6166 addptr(to, 8); | |
6167 BIND(L_fill_8_bytes); | |
6168 subl(count, 1 << (shift + 1)); | |
6169 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop); | |
6170 // fall through to fill 4 bytes | |
6171 } else { | |
6172 Label L_fill_32_bytes; | |
6173 if (!UseUnalignedLoadStores) { | |
6174 // align to 8 bytes, we know we are 4 byte aligned to start | |
6175 testptr(to, 4); | |
6176 jccb(Assembler::zero, L_fill_32_bytes); | |
6177 movl(Address(to, 0), value); | |
6178 addptr(to, 4); | |
6179 subl(count, 1<<shift); | |
6180 } | |
6181 BIND(L_fill_32_bytes); | |
6182 { | |
6183 assert( UseSSE >= 2, "supported cpu only" ); | |
6184 Label L_fill_32_bytes_loop, L_check_fill_8_bytes, L_fill_8_bytes_loop, L_fill_8_bytes; | |
6185 movdl(xtmp, value); | |
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6186 if (UseAVX >= 2 && UseUnalignedLoadStores) { |
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6187 // Fill 64-byte chunks |
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6188 Label L_fill_64_bytes_loop, L_check_fill_32_bytes; |
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6189 vpbroadcastd(xtmp, xtmp); |
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6190 |
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6191 subl(count, 16 << shift); |
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6192 jcc(Assembler::less, L_check_fill_32_bytes); |
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6193 align(16); |
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6194 |
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6195 BIND(L_fill_64_bytes_loop); |
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6196 vmovdqu(Address(to, 0), xtmp); |
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6197 vmovdqu(Address(to, 32), xtmp); |
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6198 addptr(to, 64); |
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6199 subl(count, 16 << shift); |
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6200 jcc(Assembler::greaterEqual, L_fill_64_bytes_loop); |
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6201 |
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6202 BIND(L_check_fill_32_bytes); |
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6203 addl(count, 8 << shift); |
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|
6204 jccb(Assembler::less, L_check_fill_8_bytes); |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
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diff
changeset
|
6205 vmovdqu(Address(to, 0), xtmp); |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
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7474
diff
changeset
|
6206 addptr(to, 32); |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
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7474
diff
changeset
|
6207 subl(count, 8 << shift); |
8873
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
6208 |
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
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8767
diff
changeset
|
6209 BIND(L_check_fill_8_bytes); |
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
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8767
diff
changeset
|
6210 // clean upper bits of YMM registers |
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
6211 vzeroupper(); |
7199 | 6212 } else { |
7475
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6213 // Fill 32-byte chunks |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6214 pshufd(xtmp, xtmp, 0); |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6215 |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6216 subl(count, 8 << shift); |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6217 jcc(Assembler::less, L_check_fill_8_bytes); |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6218 align(16); |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6219 |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6220 BIND(L_fill_32_bytes_loop); |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6221 |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6222 if (UseUnalignedLoadStores) { |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6223 movdqu(Address(to, 0), xtmp); |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6224 movdqu(Address(to, 16), xtmp); |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6225 } else { |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6226 movq(Address(to, 0), xtmp); |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6227 movq(Address(to, 8), xtmp); |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6228 movq(Address(to, 16), xtmp); |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6229 movq(Address(to, 24), xtmp); |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6230 } |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6231 |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6232 addptr(to, 32); |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6233 subl(count, 8 << shift); |
e2e6bf86682c
8005544: Use 256bit YMM registers in arraycopy stubs on x86
kvn
parents:
7474
diff
changeset
|
6234 jcc(Assembler::greaterEqual, L_fill_32_bytes_loop); |
8873
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
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diff
changeset
|
6235 |
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
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8767
diff
changeset
|
6236 BIND(L_check_fill_8_bytes); |
7199 | 6237 } |
6238 addl(count, 8 << shift); | |
6239 jccb(Assembler::zero, L_exit); | |
6240 jmpb(L_fill_8_bytes); | |
6241 | |
6242 // | |
6243 // length is too short, just fill qwords | |
6244 // | |
6245 BIND(L_fill_8_bytes_loop); | |
6246 movq(Address(to, 0), xtmp); | |
6247 addptr(to, 8); | |
6248 BIND(L_fill_8_bytes); | |
6249 subl(count, 1 << (shift + 1)); | |
6250 jcc(Assembler::greaterEqual, L_fill_8_bytes_loop); | |
6251 } | |
6252 } | |
6253 // fill trailing 4 bytes | |
6254 BIND(L_fill_4_bytes); | |
6255 testl(count, 1<<shift); | |
6256 jccb(Assembler::zero, L_fill_2_bytes); | |
6257 movl(Address(to, 0), value); | |
6258 if (t == T_BYTE || t == T_SHORT) { | |
6259 addptr(to, 4); | |
6260 BIND(L_fill_2_bytes); | |
6261 // fill trailing 2 bytes | |
6262 testl(count, 1<<(shift-1)); | |
6263 jccb(Assembler::zero, L_fill_byte); | |
6264 movw(Address(to, 0), value); | |
6265 if (t == T_BYTE) { | |
6266 addptr(to, 2); | |
6267 BIND(L_fill_byte); | |
6268 // fill trailing byte | |
6269 testl(count, 1); | |
6270 jccb(Assembler::zero, L_exit); | |
6271 movb(Address(to, 0), value); | |
6272 } else { | |
6273 BIND(L_fill_byte); | |
6274 } | |
6275 } else { | |
6276 BIND(L_fill_2_bytes); | |
6277 } | |
6278 BIND(L_exit); | |
6279 } | |
7637
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6280 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6281 // encode char[] to byte[] in ISO_8859_1 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6282 void MacroAssembler::encode_iso_array(Register src, Register dst, Register len, |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6283 XMMRegister tmp1Reg, XMMRegister tmp2Reg, |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6284 XMMRegister tmp3Reg, XMMRegister tmp4Reg, |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6285 Register tmp5, Register result) { |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6286 // rsi: src |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6287 // rdi: dst |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6288 // rdx: len |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6289 // rcx: tmp5 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6290 // rax: result |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6291 ShortBranchVerifier sbv(this); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6292 assert_different_registers(src, dst, len, tmp5, result); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6293 Label L_done, L_copy_1_char, L_copy_1_char_exit; |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6294 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6295 // set result |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6296 xorl(result, result); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6297 // check for zero length |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6298 testl(len, len); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6299 jcc(Assembler::zero, L_done); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6300 movl(result, len); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6301 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6302 // Setup pointers |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6303 lea(src, Address(src, len, Address::times_2)); // char[] |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6304 lea(dst, Address(dst, len, Address::times_1)); // byte[] |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6305 negptr(len); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6306 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6307 if (UseSSE42Intrinsics || UseAVX >= 2) { |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6308 Label L_chars_8_check, L_copy_8_chars, L_copy_8_chars_exit; |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6309 Label L_chars_16_check, L_copy_16_chars, L_copy_16_chars_exit; |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6310 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6311 if (UseAVX >= 2) { |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6312 Label L_chars_32_check, L_copy_32_chars, L_copy_32_chars_exit; |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6313 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vector |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6314 movdl(tmp1Reg, tmp5); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6315 vpbroadcastd(tmp1Reg, tmp1Reg); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6316 jmpb(L_chars_32_check); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6317 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6318 bind(L_copy_32_chars); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6319 vmovdqu(tmp3Reg, Address(src, len, Address::times_2, -64)); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6320 vmovdqu(tmp4Reg, Address(src, len, Address::times_2, -32)); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6321 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector256 */ true); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6322 vptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6323 jccb(Assembler::notZero, L_copy_32_chars_exit); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6324 vpackuswb(tmp3Reg, tmp3Reg, tmp4Reg, /* vector256 */ true); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6325 vpermq(tmp4Reg, tmp3Reg, 0xD8, /* vector256 */ true); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6326 vmovdqu(Address(dst, len, Address::times_1, -32), tmp4Reg); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6327 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6328 bind(L_chars_32_check); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6329 addptr(len, 32); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6330 jccb(Assembler::lessEqual, L_copy_32_chars); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6331 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6332 bind(L_copy_32_chars_exit); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6333 subptr(len, 16); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6334 jccb(Assembler::greater, L_copy_16_chars_exit); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6335 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6336 } else if (UseSSE42Intrinsics) { |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6337 movl(tmp5, 0xff00ff00); // create mask to test for Unicode chars in vector |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6338 movdl(tmp1Reg, tmp5); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6339 pshufd(tmp1Reg, tmp1Reg, 0); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6340 jmpb(L_chars_16_check); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6341 } |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6342 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6343 bind(L_copy_16_chars); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6344 if (UseAVX >= 2) { |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6345 vmovdqu(tmp2Reg, Address(src, len, Address::times_2, -32)); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6346 vptest(tmp2Reg, tmp1Reg); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6347 jccb(Assembler::notZero, L_copy_16_chars_exit); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6348 vpackuswb(tmp2Reg, tmp2Reg, tmp1Reg, /* vector256 */ true); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6349 vpermq(tmp3Reg, tmp2Reg, 0xD8, /* vector256 */ true); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6350 } else { |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6351 if (UseAVX > 0) { |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6352 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32)); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6353 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16)); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6354 vpor(tmp2Reg, tmp3Reg, tmp4Reg, /* vector256 */ false); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6355 } else { |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6356 movdqu(tmp3Reg, Address(src, len, Address::times_2, -32)); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6357 por(tmp2Reg, tmp3Reg); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6358 movdqu(tmp4Reg, Address(src, len, Address::times_2, -16)); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6359 por(tmp2Reg, tmp4Reg); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6360 } |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6361 ptest(tmp2Reg, tmp1Reg); // check for Unicode chars in vector |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6362 jccb(Assembler::notZero, L_copy_16_chars_exit); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6363 packuswb(tmp3Reg, tmp4Reg); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6364 } |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6365 movdqu(Address(dst, len, Address::times_1, -16), tmp3Reg); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6366 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6367 bind(L_chars_16_check); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6368 addptr(len, 16); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6369 jccb(Assembler::lessEqual, L_copy_16_chars); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6370 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6371 bind(L_copy_16_chars_exit); |
8873
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
6372 if (UseAVX >= 2) { |
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
6373 // clean upper bits of YMM registers |
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
6374 vzeroupper(); |
e961c11b85fe
8011102: Clear AVX registers after return from JNI call
kvn
parents:
8767
diff
changeset
|
6375 } |
7637
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6376 subptr(len, 8); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6377 jccb(Assembler::greater, L_copy_8_chars_exit); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6378 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6379 bind(L_copy_8_chars); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6380 movdqu(tmp3Reg, Address(src, len, Address::times_2, -16)); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6381 ptest(tmp3Reg, tmp1Reg); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6382 jccb(Assembler::notZero, L_copy_8_chars_exit); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6383 packuswb(tmp3Reg, tmp1Reg); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6384 movq(Address(dst, len, Address::times_1, -8), tmp3Reg); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6385 addptr(len, 8); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6386 jccb(Assembler::lessEqual, L_copy_8_chars); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6387 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6388 bind(L_copy_8_chars_exit); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6389 subptr(len, 8); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6390 jccb(Assembler::zero, L_done); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6391 } |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6392 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6393 bind(L_copy_1_char); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6394 load_unsigned_short(tmp5, Address(src, len, Address::times_2, 0)); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6395 testl(tmp5, 0xff00); // check if Unicode char |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6396 jccb(Assembler::notZero, L_copy_1_char_exit); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6397 movb(Address(dst, len, Address::times_1, 0), tmp5); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6398 addptr(len, 1); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6399 jccb(Assembler::less, L_copy_1_char); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6400 |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6401 bind(L_copy_1_char_exit); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6402 addptr(result, len); // len is negative count of not processed elements |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6403 bind(L_done); |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6404 } |
b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
kvn
parents:
7477
diff
changeset
|
6405 |
11080
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6406 /** |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6407 * Emits code to update CRC-32 with a byte value according to constants in table |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6408 * |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6409 * @param [in,out]crc Register containing the crc. |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6410 * @param [in]val Register containing the byte to fold into the CRC. |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6411 * @param [in]table Register containing the table of crc constants. |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6412 * |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6413 * uint32_t crc; |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6414 * val = crc_table[(val ^ crc) & 0xFF]; |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6415 * crc = val ^ (crc >> 8); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6416 * |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6417 */ |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6418 void MacroAssembler::update_byte_crc32(Register crc, Register val, Register table) { |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6419 xorl(val, crc); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6420 andl(val, 0xFF); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6421 shrl(crc, 8); // unsigned shift |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6422 xorl(crc, Address(table, val, Address::times_4, 0)); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6423 } |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6424 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6425 /** |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6426 * Fold 128-bit data chunk |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6427 */ |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6428 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, Register buf, int offset) { |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6429 vpclmulhdq(xtmp, xK, xcrc); // [123:64] |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6430 vpclmulldq(xcrc, xK, xcrc); // [63:0] |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6431 vpxor(xcrc, xcrc, Address(buf, offset), false /* vector256 */); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6432 pxor(xcrc, xtmp); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6433 } |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6434 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6435 void MacroAssembler::fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, XMMRegister xbuf) { |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6436 vpclmulhdq(xtmp, xK, xcrc); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6437 vpclmulldq(xcrc, xK, xcrc); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6438 pxor(xcrc, xbuf); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6439 pxor(xcrc, xtmp); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6440 } |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6441 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6442 /** |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6443 * 8-bit folds to compute 32-bit CRC |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6444 * |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6445 * uint64_t xcrc; |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6446 * timesXtoThe32[xcrc & 0xFF] ^ (xcrc >> 8); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6447 */ |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6448 void MacroAssembler::fold_8bit_crc32(XMMRegister xcrc, Register table, XMMRegister xtmp, Register tmp) { |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6449 movdl(tmp, xcrc); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6450 andl(tmp, 0xFF); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6451 movdl(xtmp, Address(table, tmp, Address::times_4, 0)); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6452 psrldq(xcrc, 1); // unsigned shift one byte |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6453 pxor(xcrc, xtmp); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6454 } |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6455 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6456 /** |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6457 * uint32_t crc; |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6458 * timesXtoThe32[crc & 0xFF] ^ (crc >> 8); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6459 */ |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6460 void MacroAssembler::fold_8bit_crc32(Register crc, Register table, Register tmp) { |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6461 movl(tmp, crc); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6462 andl(tmp, 0xFF); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6463 shrl(crc, 8); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6464 xorl(crc, Address(table, tmp, Address::times_4, 0)); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6465 } |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6466 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6467 /** |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6468 * @param crc register containing existing CRC (32-bit) |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6469 * @param buf register pointing to input byte buffer (byte*) |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6470 * @param len register containing number of bytes |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6471 * @param table register that will contain address of CRC table |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6472 * @param tmp scratch register |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6473 */ |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6474 void MacroAssembler::kernel_crc32(Register crc, Register buf, Register len, Register table, Register tmp) { |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6475 assert_different_registers(crc, buf, len, table, tmp, rax); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6476 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6477 Label L_tail, L_tail_restore, L_tail_loop, L_exit, L_align_loop, L_aligned; |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6478 Label L_fold_tail, L_fold_128b, L_fold_512b, L_fold_512b_loop, L_fold_tail_loop; |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6479 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6480 lea(table, ExternalAddress(StubRoutines::crc_table_addr())); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6481 notl(crc); // ~crc |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6482 cmpl(len, 16); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6483 jcc(Assembler::less, L_tail); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6484 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
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diff
changeset
|
6485 // Align buffer to 16 bytes |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6486 movl(tmp, buf); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6487 andl(tmp, 0xF); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6488 jccb(Assembler::zero, L_aligned); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6489 subl(tmp, 16); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6490 addl(len, tmp); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6491 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6492 align(4); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6493 BIND(L_align_loop); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6494 movsbl(rax, Address(buf, 0)); // load byte with sign extension |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6495 update_byte_crc32(crc, rax, table); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6496 increment(buf); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6497 incrementl(tmp); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6498 jccb(Assembler::less, L_align_loop); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6499 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6500 BIND(L_aligned); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6501 movl(tmp, len); // save |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6502 shrl(len, 4); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6503 jcc(Assembler::zero, L_tail_restore); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6504 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6505 // Fold crc into first bytes of vector |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6506 movdqa(xmm1, Address(buf, 0)); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6507 movdl(rax, xmm1); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6508 xorl(crc, rax); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6509 pinsrd(xmm1, crc, 0); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6510 addptr(buf, 16); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6511 subl(len, 4); // len > 0 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6512 jcc(Assembler::less, L_fold_tail); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6513 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6514 movdqa(xmm2, Address(buf, 0)); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6515 movdqa(xmm3, Address(buf, 16)); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6516 movdqa(xmm4, Address(buf, 32)); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6517 addptr(buf, 48); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6518 subl(len, 3); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6519 jcc(Assembler::lessEqual, L_fold_512b); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6520 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6521 // Fold total 512 bits of polynomial on each iteration, |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6522 // 128 bits per each of 4 parallel streams. |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6523 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 32)); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6524 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6525 align(32); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6526 BIND(L_fold_512b_loop); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6527 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6528 fold_128bit_crc32(xmm2, xmm0, xmm5, buf, 16); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6529 fold_128bit_crc32(xmm3, xmm0, xmm5, buf, 32); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6530 fold_128bit_crc32(xmm4, xmm0, xmm5, buf, 48); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6531 addptr(buf, 64); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6532 subl(len, 4); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6533 jcc(Assembler::greater, L_fold_512b_loop); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6534 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6535 // Fold 512 bits to 128 bits. |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6536 BIND(L_fold_512b); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6537 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16)); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6538 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm2); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6539 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm3); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6540 fold_128bit_crc32(xmm1, xmm0, xmm5, xmm4); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6541 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6542 // Fold the rest of 128 bits data chunks |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6543 BIND(L_fold_tail); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6544 addl(len, 3); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6545 jccb(Assembler::lessEqual, L_fold_128b); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6546 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr() + 16)); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6547 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6548 BIND(L_fold_tail_loop); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6549 fold_128bit_crc32(xmm1, xmm0, xmm5, buf, 0); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6550 addptr(buf, 16); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6551 decrementl(len); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6552 jccb(Assembler::greater, L_fold_tail_loop); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6553 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6554 // Fold 128 bits in xmm1 down into 32 bits in crc register. |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6555 BIND(L_fold_128b); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6556 movdqu(xmm0, ExternalAddress(StubRoutines::x86::crc_by128_masks_addr())); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6557 vpclmulqdq(xmm2, xmm0, xmm1, 0x1); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6558 vpand(xmm3, xmm0, xmm2, false /* vector256 */); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6559 vpclmulqdq(xmm0, xmm0, xmm3, 0x1); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6560 psrldq(xmm1, 8); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6561 psrldq(xmm2, 4); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6562 pxor(xmm0, xmm1); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6563 pxor(xmm0, xmm2); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6564 |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6565 // 8 8-bit folds to compute 32-bit CRC. |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6566 for (int j = 0; j < 4; j++) { |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6567 fold_8bit_crc32(xmm0, table, xmm1, rax); |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6568 } |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6569 movdl(crc, xmm0); // mov 32 bits to general register |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6570 for (int j = 0; j < 4; j++) { |
b800986664f4
7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32
drchase
parents:
8873
diff
changeset
|
6571 fold_8bit_crc32(crc, table, rax); |
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6572 } |
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6573 |
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6574 BIND(L_tail_restore); |
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6575 movl(len, tmp); // restore |
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6576 BIND(L_tail); |
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6577 andl(len, 0xf); |
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6578 jccb(Assembler::zero, L_exit); |
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6579 |
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6580 // Fold the rest of bytes |
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6581 align(4); |
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6582 BIND(L_tail_loop); |
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6583 movsbl(rax, Address(buf, 0)); // load byte with sign extension |
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6584 update_byte_crc32(crc, rax, table); |
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6585 increment(buf); |
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6586 decrementl(len); |
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6587 jccb(Assembler::greater, L_tail_loop); |
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6588 |
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6589 BIND(L_exit); |
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6590 notl(crc); // ~c |
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6591 } |
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6592 |
7199 | 6593 #undef BIND |
6594 #undef BLOCK_COMMENT | |
6595 | |
6596 | |
6597 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) { | |
6598 switch (cond) { | |
6599 // Note some conditions are synonyms for others | |
6600 case Assembler::zero: return Assembler::notZero; | |
6601 case Assembler::notZero: return Assembler::zero; | |
6602 case Assembler::less: return Assembler::greaterEqual; | |
6603 case Assembler::lessEqual: return Assembler::greater; | |
6604 case Assembler::greater: return Assembler::lessEqual; | |
6605 case Assembler::greaterEqual: return Assembler::less; | |
6606 case Assembler::below: return Assembler::aboveEqual; | |
6607 case Assembler::belowEqual: return Assembler::above; | |
6608 case Assembler::above: return Assembler::belowEqual; | |
6609 case Assembler::aboveEqual: return Assembler::below; | |
6610 case Assembler::overflow: return Assembler::noOverflow; | |
6611 case Assembler::noOverflow: return Assembler::overflow; | |
6612 case Assembler::negative: return Assembler::positive; | |
6613 case Assembler::positive: return Assembler::negative; | |
6614 case Assembler::parity: return Assembler::noParity; | |
6615 case Assembler::noParity: return Assembler::parity; | |
6616 } | |
6617 ShouldNotReachHere(); return Assembler::overflow; | |
6618 } | |
6619 | |
6620 SkipIfEqual::SkipIfEqual( | |
6621 MacroAssembler* masm, const bool* flag_addr, bool value) { | |
6622 _masm = masm; | |
6623 _masm->cmp8(ExternalAddress((address)flag_addr), value); | |
6624 _masm->jcc(Assembler::equal, _label); | |
6625 } | |
6626 | |
6627 SkipIfEqual::~SkipIfEqual() { | |
6628 _masm->bind(_label); | |
6629 } |