Mercurial > hg > truffle
annotate src/cpu/sparc/vm/macroAssembler_sparc.cpp @ 9378:0e661acc3b4a
Fix null pointer exception in if reordering.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sun, 28 Apr 2013 01:01:00 +0200 |
parents | a5de0cc2f91c |
children | 8d52e305a777 |
rev | line source |
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7204 | 1 /* |
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 * | |
23 */ | |
24 | |
25 #include "precompiled.hpp" | |
26 #include "asm/assembler.inline.hpp" | |
27 #include "compiler/disassembler.hpp" | |
28 #include "gc_interface/collectedHeap.inline.hpp" | |
29 #include "interpreter/interpreter.hpp" | |
30 #include "memory/cardTableModRefBS.hpp" | |
31 #include "memory/resourceArea.hpp" | |
32 #include "prims/methodHandles.hpp" | |
33 #include "runtime/biasedLocking.hpp" | |
34 #include "runtime/interfaceSupport.hpp" | |
35 #include "runtime/objectMonitor.hpp" | |
36 #include "runtime/os.hpp" | |
37 #include "runtime/sharedRuntime.hpp" | |
38 #include "runtime/stubRoutines.hpp" | |
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39 #include "utilities/macros.hpp" |
db9981fd3124
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40 #if INCLUDE_ALL_GCS |
7204 | 41 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
42 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" | |
43 #include "gc_implementation/g1/heapRegion.hpp" | |
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44 #endif // INCLUDE_ALL_GCS |
7204 | 45 |
46 #ifdef PRODUCT | |
47 #define BLOCK_COMMENT(str) /* nothing */ | |
48 #define STOP(error) stop(error) | |
49 #else | |
50 #define BLOCK_COMMENT(str) block_comment(str) | |
51 #define STOP(error) block_comment(error); stop(error) | |
52 #endif | |
53 | |
54 // Convert the raw encoding form into the form expected by the | |
55 // constructor for Address. | |
56 Address Address::make_raw(int base, int index, int scale, int disp, relocInfo::relocType disp_reloc) { | |
57 assert(scale == 0, "not supported"); | |
58 RelocationHolder rspec; | |
59 if (disp_reloc != relocInfo::none) { | |
60 rspec = Relocation::spec_simple(disp_reloc); | |
61 } | |
62 | |
63 Register rindex = as_Register(index); | |
64 if (rindex != G0) { | |
65 Address madr(as_Register(base), rindex); | |
66 madr._rspec = rspec; | |
67 return madr; | |
68 } else { | |
69 Address madr(as_Register(base), disp); | |
70 madr._rspec = rspec; | |
71 return madr; | |
72 } | |
73 } | |
74 | |
75 Address Argument::address_in_frame() const { | |
76 // Warning: In LP64 mode disp will occupy more than 10 bits, but | |
77 // op codes such as ld or ldx, only access disp() to get | |
78 // their simm13 argument. | |
79 int disp = ((_number - Argument::n_register_parameters + frame::memory_parameter_word_sp_offset) * BytesPerWord) + STACK_BIAS; | |
80 if (is_in()) | |
81 return Address(FP, disp); // In argument. | |
82 else | |
83 return Address(SP, disp); // Out argument. | |
84 } | |
85 | |
86 static const char* argumentNames[][2] = { | |
87 {"A0","P0"}, {"A1","P1"}, {"A2","P2"}, {"A3","P3"}, {"A4","P4"}, | |
88 {"A5","P5"}, {"A6","P6"}, {"A7","P7"}, {"A8","P8"}, {"A9","P9"}, | |
89 {"A(n>9)","P(n>9)"} | |
90 }; | |
91 | |
92 const char* Argument::name() const { | |
93 int nofArgs = sizeof argumentNames / sizeof argumentNames[0]; | |
94 int num = number(); | |
95 if (num >= nofArgs) num = nofArgs - 1; | |
96 return argumentNames[num][is_in() ? 1 : 0]; | |
97 } | |
98 | |
99 #ifdef ASSERT | |
100 // On RISC, there's no benefit to verifying instruction boundaries. | |
101 bool AbstractAssembler::pd_check_instruction_mark() { return false; } | |
102 #endif | |
103 | |
104 // Patch instruction inst at offset inst_pos to refer to dest_pos | |
105 // and return the resulting instruction. | |
106 // We should have pcs, not offsets, but since all is relative, it will work out | |
107 // OK. | |
108 int MacroAssembler::patched_branch(int dest_pos, int inst, int inst_pos) { | |
109 int m; // mask for displacement field | |
110 int v; // new value for displacement field | |
111 const int word_aligned_ones = -4; | |
112 switch (inv_op(inst)) { | |
113 default: ShouldNotReachHere(); | |
114 case call_op: m = wdisp(word_aligned_ones, 0, 30); v = wdisp(dest_pos, inst_pos, 30); break; | |
115 case branch_op: | |
116 switch (inv_op2(inst)) { | |
117 case fbp_op2: m = wdisp( word_aligned_ones, 0, 19); v = wdisp( dest_pos, inst_pos, 19); break; | |
118 case bp_op2: m = wdisp( word_aligned_ones, 0, 19); v = wdisp( dest_pos, inst_pos, 19); break; | |
119 case fb_op2: m = wdisp( word_aligned_ones, 0, 22); v = wdisp( dest_pos, inst_pos, 22); break; | |
120 case br_op2: m = wdisp( word_aligned_ones, 0, 22); v = wdisp( dest_pos, inst_pos, 22); break; | |
121 case cb_op2: m = wdisp( word_aligned_ones, 0, 22); v = wdisp( dest_pos, inst_pos, 22); break; | |
122 case bpr_op2: { | |
123 if (is_cbcond(inst)) { | |
124 m = wdisp10(word_aligned_ones, 0); | |
125 v = wdisp10(dest_pos, inst_pos); | |
126 } else { | |
127 m = wdisp16(word_aligned_ones, 0); | |
128 v = wdisp16(dest_pos, inst_pos); | |
129 } | |
130 break; | |
131 } | |
132 default: ShouldNotReachHere(); | |
133 } | |
134 } | |
135 return inst & ~m | v; | |
136 } | |
137 | |
138 // Return the offset of the branch destionation of instruction inst | |
139 // at offset pos. | |
140 // Should have pcs, but since all is relative, it works out. | |
141 int MacroAssembler::branch_destination(int inst, int pos) { | |
142 int r; | |
143 switch (inv_op(inst)) { | |
144 default: ShouldNotReachHere(); | |
145 case call_op: r = inv_wdisp(inst, pos, 30); break; | |
146 case branch_op: | |
147 switch (inv_op2(inst)) { | |
148 case fbp_op2: r = inv_wdisp( inst, pos, 19); break; | |
149 case bp_op2: r = inv_wdisp( inst, pos, 19); break; | |
150 case fb_op2: r = inv_wdisp( inst, pos, 22); break; | |
151 case br_op2: r = inv_wdisp( inst, pos, 22); break; | |
152 case cb_op2: r = inv_wdisp( inst, pos, 22); break; | |
153 case bpr_op2: { | |
154 if (is_cbcond(inst)) { | |
155 r = inv_wdisp10(inst, pos); | |
156 } else { | |
157 r = inv_wdisp16(inst, pos); | |
158 } | |
159 break; | |
160 } | |
161 default: ShouldNotReachHere(); | |
162 } | |
163 } | |
164 return r; | |
165 } | |
166 | |
167 void MacroAssembler::null_check(Register reg, int offset) { | |
168 if (needs_explicit_null_check((intptr_t)offset)) { | |
169 // provoke OS NULL exception if reg = NULL by | |
170 // accessing M[reg] w/o changing any registers | |
171 ld_ptr(reg, 0, G0); | |
172 } | |
173 else { | |
174 // nothing to do, (later) access of M[reg + offset] | |
175 // will provoke OS NULL exception if reg = NULL | |
176 } | |
177 } | |
178 | |
179 // Ring buffer jumps | |
180 | |
181 #ifndef PRODUCT | |
182 void MacroAssembler::ret( bool trace ) { if (trace) { | |
183 mov(I7, O7); // traceable register | |
184 JMP(O7, 2 * BytesPerInstWord); | |
185 } else { | |
186 jmpl( I7, 2 * BytesPerInstWord, G0 ); | |
187 } | |
188 } | |
189 | |
190 void MacroAssembler::retl( bool trace ) { if (trace) JMP(O7, 2 * BytesPerInstWord); | |
191 else jmpl( O7, 2 * BytesPerInstWord, G0 ); } | |
192 #endif /* PRODUCT */ | |
193 | |
194 | |
195 void MacroAssembler::jmp2(Register r1, Register r2, const char* file, int line ) { | |
196 assert_not_delayed(); | |
197 // This can only be traceable if r1 & r2 are visible after a window save | |
198 if (TraceJumps) { | |
199 #ifndef PRODUCT | |
200 save_frame(0); | |
201 verify_thread(); | |
202 ld(G2_thread, in_bytes(JavaThread::jmp_ring_index_offset()), O0); | |
203 add(G2_thread, in_bytes(JavaThread::jmp_ring_offset()), O1); | |
204 sll(O0, exact_log2(4*sizeof(intptr_t)), O2); | |
205 add(O2, O1, O1); | |
206 | |
207 add(r1->after_save(), r2->after_save(), O2); | |
208 set((intptr_t)file, O3); | |
209 set(line, O4); | |
210 Label L; | |
211 // get nearby pc, store jmp target | |
212 call(L, relocInfo::none); // No relocation for call to pc+0x8 | |
213 delayed()->st(O2, O1, 0); | |
214 bind(L); | |
215 | |
216 // store nearby pc | |
217 st(O7, O1, sizeof(intptr_t)); | |
218 // store file | |
219 st(O3, O1, 2*sizeof(intptr_t)); | |
220 // store line | |
221 st(O4, O1, 3*sizeof(intptr_t)); | |
222 add(O0, 1, O0); | |
223 and3(O0, JavaThread::jump_ring_buffer_size - 1, O0); | |
224 st(O0, G2_thread, in_bytes(JavaThread::jmp_ring_index_offset())); | |
225 restore(); | |
226 #endif /* PRODUCT */ | |
227 } | |
228 jmpl(r1, r2, G0); | |
229 } | |
230 void MacroAssembler::jmp(Register r1, int offset, const char* file, int line ) { | |
231 assert_not_delayed(); | |
232 // This can only be traceable if r1 is visible after a window save | |
233 if (TraceJumps) { | |
234 #ifndef PRODUCT | |
235 save_frame(0); | |
236 verify_thread(); | |
237 ld(G2_thread, in_bytes(JavaThread::jmp_ring_index_offset()), O0); | |
238 add(G2_thread, in_bytes(JavaThread::jmp_ring_offset()), O1); | |
239 sll(O0, exact_log2(4*sizeof(intptr_t)), O2); | |
240 add(O2, O1, O1); | |
241 | |
242 add(r1->after_save(), offset, O2); | |
243 set((intptr_t)file, O3); | |
244 set(line, O4); | |
245 Label L; | |
246 // get nearby pc, store jmp target | |
247 call(L, relocInfo::none); // No relocation for call to pc+0x8 | |
248 delayed()->st(O2, O1, 0); | |
249 bind(L); | |
250 | |
251 // store nearby pc | |
252 st(O7, O1, sizeof(intptr_t)); | |
253 // store file | |
254 st(O3, O1, 2*sizeof(intptr_t)); | |
255 // store line | |
256 st(O4, O1, 3*sizeof(intptr_t)); | |
257 add(O0, 1, O0); | |
258 and3(O0, JavaThread::jump_ring_buffer_size - 1, O0); | |
259 st(O0, G2_thread, in_bytes(JavaThread::jmp_ring_index_offset())); | |
260 restore(); | |
261 #endif /* PRODUCT */ | |
262 } | |
263 jmp(r1, offset); | |
264 } | |
265 | |
266 // This code sequence is relocatable to any address, even on LP64. | |
267 void MacroAssembler::jumpl(const AddressLiteral& addrlit, Register temp, Register d, int offset, const char* file, int line) { | |
268 assert_not_delayed(); | |
269 // Force fixed length sethi because NativeJump and NativeFarCall don't handle | |
270 // variable length instruction streams. | |
271 patchable_sethi(addrlit, temp); | |
272 Address a(temp, addrlit.low10() + offset); // Add the offset to the displacement. | |
273 if (TraceJumps) { | |
274 #ifndef PRODUCT | |
275 // Must do the add here so relocation can find the remainder of the | |
276 // value to be relocated. | |
277 add(a.base(), a.disp(), a.base(), addrlit.rspec(offset)); | |
278 save_frame(0); | |
279 verify_thread(); | |
280 ld(G2_thread, in_bytes(JavaThread::jmp_ring_index_offset()), O0); | |
281 add(G2_thread, in_bytes(JavaThread::jmp_ring_offset()), O1); | |
282 sll(O0, exact_log2(4*sizeof(intptr_t)), O2); | |
283 add(O2, O1, O1); | |
284 | |
285 set((intptr_t)file, O3); | |
286 set(line, O4); | |
287 Label L; | |
288 | |
289 // get nearby pc, store jmp target | |
290 call(L, relocInfo::none); // No relocation for call to pc+0x8 | |
291 delayed()->st(a.base()->after_save(), O1, 0); | |
292 bind(L); | |
293 | |
294 // store nearby pc | |
295 st(O7, O1, sizeof(intptr_t)); | |
296 // store file | |
297 st(O3, O1, 2*sizeof(intptr_t)); | |
298 // store line | |
299 st(O4, O1, 3*sizeof(intptr_t)); | |
300 add(O0, 1, O0); | |
301 and3(O0, JavaThread::jump_ring_buffer_size - 1, O0); | |
302 st(O0, G2_thread, in_bytes(JavaThread::jmp_ring_index_offset())); | |
303 restore(); | |
304 jmpl(a.base(), G0, d); | |
305 #else | |
306 jmpl(a.base(), a.disp(), d); | |
307 #endif /* PRODUCT */ | |
308 } else { | |
309 jmpl(a.base(), a.disp(), d); | |
310 } | |
311 } | |
312 | |
313 void MacroAssembler::jump(const AddressLiteral& addrlit, Register temp, int offset, const char* file, int line) { | |
314 jumpl(addrlit, temp, G0, offset, file, line); | |
315 } | |
316 | |
317 | |
318 // Conditional breakpoint (for assertion checks in assembly code) | |
319 void MacroAssembler::breakpoint_trap(Condition c, CC cc) { | |
320 trap(c, cc, G0, ST_RESERVED_FOR_USER_0); | |
321 } | |
322 | |
323 // We want to use ST_BREAKPOINT here, but the debugger is confused by it. | |
324 void MacroAssembler::breakpoint_trap() { | |
325 trap(ST_RESERVED_FOR_USER_0); | |
326 } | |
327 | |
328 // flush windows (except current) using flushw instruction if avail. | |
329 void MacroAssembler::flush_windows() { | |
330 if (VM_Version::v9_instructions_work()) flushw(); | |
331 else flush_windows_trap(); | |
332 } | |
333 | |
334 // Write serialization page so VM thread can do a pseudo remote membar | |
335 // We use the current thread pointer to calculate a thread specific | |
336 // offset to write to within the page. This minimizes bus traffic | |
337 // due to cache line collision. | |
338 void MacroAssembler::serialize_memory(Register thread, Register tmp1, Register tmp2) { | |
339 srl(thread, os::get_serialize_page_shift_count(), tmp2); | |
340 if (Assembler::is_simm13(os::vm_page_size())) { | |
341 and3(tmp2, (os::vm_page_size() - sizeof(int)), tmp2); | |
342 } | |
343 else { | |
344 set((os::vm_page_size() - sizeof(int)), tmp1); | |
345 and3(tmp2, tmp1, tmp2); | |
346 } | |
347 set(os::get_memory_serialize_page(), tmp1); | |
348 st(G0, tmp1, tmp2); | |
349 } | |
350 | |
351 | |
352 | |
353 void MacroAssembler::enter() { | |
354 Unimplemented(); | |
355 } | |
356 | |
357 void MacroAssembler::leave() { | |
358 Unimplemented(); | |
359 } | |
360 | |
361 void MacroAssembler::mult(Register s1, Register s2, Register d) { | |
362 if(VM_Version::v9_instructions_work()) { | |
363 mulx (s1, s2, d); | |
364 } else { | |
365 smul (s1, s2, d); | |
366 } | |
367 } | |
368 | |
369 void MacroAssembler::mult(Register s1, int simm13a, Register d) { | |
370 if(VM_Version::v9_instructions_work()) { | |
371 mulx (s1, simm13a, d); | |
372 } else { | |
373 smul (s1, simm13a, d); | |
374 } | |
375 } | |
376 | |
377 | |
378 #ifdef ASSERT | |
379 void MacroAssembler::read_ccr_v8_assert(Register ccr_save) { | |
380 const Register s1 = G3_scratch; | |
381 const Register s2 = G4_scratch; | |
382 Label get_psr_test; | |
383 // Get the condition codes the V8 way. | |
384 read_ccr_trap(s1); | |
385 mov(ccr_save, s2); | |
386 // This is a test of V8 which has icc but not xcc | |
387 // so mask off the xcc bits | |
388 and3(s2, 0xf, s2); | |
389 // Compare condition codes from the V8 and V9 ways. | |
390 subcc(s2, s1, G0); | |
391 br(Assembler::notEqual, true, Assembler::pt, get_psr_test); | |
392 delayed()->breakpoint_trap(); | |
393 bind(get_psr_test); | |
394 } | |
395 | |
396 void MacroAssembler::write_ccr_v8_assert(Register ccr_save) { | |
397 const Register s1 = G3_scratch; | |
398 const Register s2 = G4_scratch; | |
399 Label set_psr_test; | |
400 // Write out the saved condition codes the V8 way | |
401 write_ccr_trap(ccr_save, s1, s2); | |
402 // Read back the condition codes using the V9 instruction | |
403 rdccr(s1); | |
404 mov(ccr_save, s2); | |
405 // This is a test of V8 which has icc but not xcc | |
406 // so mask off the xcc bits | |
407 and3(s2, 0xf, s2); | |
408 and3(s1, 0xf, s1); | |
409 // Compare the V8 way with the V9 way. | |
410 subcc(s2, s1, G0); | |
411 br(Assembler::notEqual, true, Assembler::pt, set_psr_test); | |
412 delayed()->breakpoint_trap(); | |
413 bind(set_psr_test); | |
414 } | |
415 #else | |
416 #define read_ccr_v8_assert(x) | |
417 #define write_ccr_v8_assert(x) | |
418 #endif // ASSERT | |
419 | |
420 void MacroAssembler::read_ccr(Register ccr_save) { | |
421 if (VM_Version::v9_instructions_work()) { | |
422 rdccr(ccr_save); | |
423 // Test code sequence used on V8. Do not move above rdccr. | |
424 read_ccr_v8_assert(ccr_save); | |
425 } else { | |
426 read_ccr_trap(ccr_save); | |
427 } | |
428 } | |
429 | |
430 void MacroAssembler::write_ccr(Register ccr_save) { | |
431 if (VM_Version::v9_instructions_work()) { | |
432 // Test code sequence used on V8. Do not move below wrccr. | |
433 write_ccr_v8_assert(ccr_save); | |
434 wrccr(ccr_save); | |
435 } else { | |
436 const Register temp_reg1 = G3_scratch; | |
437 const Register temp_reg2 = G4_scratch; | |
438 write_ccr_trap(ccr_save, temp_reg1, temp_reg2); | |
439 } | |
440 } | |
441 | |
442 | |
443 // Calls to C land | |
444 | |
445 #ifdef ASSERT | |
446 // a hook for debugging | |
447 static Thread* reinitialize_thread() { | |
448 return ThreadLocalStorage::thread(); | |
449 } | |
450 #else | |
451 #define reinitialize_thread ThreadLocalStorage::thread | |
452 #endif | |
453 | |
454 #ifdef ASSERT | |
455 address last_get_thread = NULL; | |
456 #endif | |
457 | |
458 // call this when G2_thread is not known to be valid | |
459 void MacroAssembler::get_thread() { | |
460 save_frame(0); // to avoid clobbering O0 | |
461 mov(G1, L0); // avoid clobbering G1 | |
462 mov(G5_method, L1); // avoid clobbering G5 | |
463 mov(G3, L2); // avoid clobbering G3 also | |
464 mov(G4, L5); // avoid clobbering G4 | |
465 #ifdef ASSERT | |
466 AddressLiteral last_get_thread_addrlit(&last_get_thread); | |
467 set(last_get_thread_addrlit, L3); | |
468 inc(L4, get_pc(L4) + 2 * BytesPerInstWord); // skip getpc() code + inc + st_ptr to point L4 at call | |
469 st_ptr(L4, L3, 0); | |
470 #endif | |
471 call(CAST_FROM_FN_PTR(address, reinitialize_thread), relocInfo::runtime_call_type); | |
472 delayed()->nop(); | |
473 mov(L0, G1); | |
474 mov(L1, G5_method); | |
475 mov(L2, G3); | |
476 mov(L5, G4); | |
477 restore(O0, 0, G2_thread); | |
478 } | |
479 | |
480 static Thread* verify_thread_subroutine(Thread* gthread_value) { | |
481 Thread* correct_value = ThreadLocalStorage::thread(); | |
482 guarantee(gthread_value == correct_value, "G2_thread value must be the thread"); | |
483 return correct_value; | |
484 } | |
485 | |
486 void MacroAssembler::verify_thread() { | |
487 if (VerifyThread) { | |
488 // NOTE: this chops off the heads of the 64-bit O registers. | |
489 #ifdef CC_INTERP | |
490 save_frame(0); | |
491 #else | |
492 // make sure G2_thread contains the right value | |
493 save_frame_and_mov(0, Lmethod, Lmethod); // to avoid clobbering O0 (and propagate Lmethod for -Xprof) | |
494 mov(G1, L1); // avoid clobbering G1 | |
495 // G2 saved below | |
496 mov(G3, L3); // avoid clobbering G3 | |
497 mov(G4, L4); // avoid clobbering G4 | |
498 mov(G5_method, L5); // avoid clobbering G5_method | |
499 #endif /* CC_INTERP */ | |
500 #if defined(COMPILER2) && !defined(_LP64) | |
501 // Save & restore possible 64-bit Long arguments in G-regs | |
502 srlx(G1,32,L0); | |
503 srlx(G4,32,L6); | |
504 #endif | |
505 call(CAST_FROM_FN_PTR(address,verify_thread_subroutine), relocInfo::runtime_call_type); | |
506 delayed()->mov(G2_thread, O0); | |
507 | |
508 mov(L1, G1); // Restore G1 | |
509 // G2 restored below | |
510 mov(L3, G3); // restore G3 | |
511 mov(L4, G4); // restore G4 | |
512 mov(L5, G5_method); // restore G5_method | |
513 #if defined(COMPILER2) && !defined(_LP64) | |
514 // Save & restore possible 64-bit Long arguments in G-regs | |
515 sllx(L0,32,G2); // Move old high G1 bits high in G2 | |
516 srl(G1, 0,G1); // Clear current high G1 bits | |
517 or3 (G1,G2,G1); // Recover 64-bit G1 | |
518 sllx(L6,32,G2); // Move old high G4 bits high in G2 | |
519 srl(G4, 0,G4); // Clear current high G4 bits | |
520 or3 (G4,G2,G4); // Recover 64-bit G4 | |
521 #endif | |
522 restore(O0, 0, G2_thread); | |
523 } | |
524 } | |
525 | |
526 | |
527 void MacroAssembler::save_thread(const Register thread_cache) { | |
528 verify_thread(); | |
529 if (thread_cache->is_valid()) { | |
530 assert(thread_cache->is_local() || thread_cache->is_in(), "bad volatile"); | |
531 mov(G2_thread, thread_cache); | |
532 } | |
533 if (VerifyThread) { | |
534 // smash G2_thread, as if the VM were about to anyway | |
535 set(0x67676767, G2_thread); | |
536 } | |
537 } | |
538 | |
539 | |
540 void MacroAssembler::restore_thread(const Register thread_cache) { | |
541 if (thread_cache->is_valid()) { | |
542 assert(thread_cache->is_local() || thread_cache->is_in(), "bad volatile"); | |
543 mov(thread_cache, G2_thread); | |
544 verify_thread(); | |
545 } else { | |
546 // do it the slow way | |
547 get_thread(); | |
548 } | |
549 } | |
550 | |
551 | |
552 // %%% maybe get rid of [re]set_last_Java_frame | |
553 void MacroAssembler::set_last_Java_frame(Register last_java_sp, Register last_Java_pc) { | |
554 assert_not_delayed(); | |
555 Address flags(G2_thread, JavaThread::frame_anchor_offset() + | |
556 JavaFrameAnchor::flags_offset()); | |
557 Address pc_addr(G2_thread, JavaThread::last_Java_pc_offset()); | |
558 | |
559 // Always set last_Java_pc and flags first because once last_Java_sp is visible | |
560 // has_last_Java_frame is true and users will look at the rest of the fields. | |
561 // (Note: flags should always be zero before we get here so doesn't need to be set.) | |
562 | |
563 #ifdef ASSERT | |
564 // Verify that flags was zeroed on return to Java | |
565 Label PcOk; | |
566 save_frame(0); // to avoid clobbering O0 | |
567 ld_ptr(pc_addr, L0); | |
568 br_null_short(L0, Assembler::pt, PcOk); | |
569 STOP("last_Java_pc not zeroed before leaving Java"); | |
570 bind(PcOk); | |
571 | |
572 // Verify that flags was zeroed on return to Java | |
573 Label FlagsOk; | |
574 ld(flags, L0); | |
575 tst(L0); | |
576 br(Assembler::zero, false, Assembler::pt, FlagsOk); | |
577 delayed() -> restore(); | |
578 STOP("flags not zeroed before leaving Java"); | |
579 bind(FlagsOk); | |
580 #endif /* ASSERT */ | |
581 // | |
582 // When returning from calling out from Java mode the frame anchor's last_Java_pc | |
583 // will always be set to NULL. It is set here so that if we are doing a call to | |
584 // native (not VM) that we capture the known pc and don't have to rely on the | |
585 // native call having a standard frame linkage where we can find the pc. | |
586 | |
587 if (last_Java_pc->is_valid()) { | |
588 st_ptr(last_Java_pc, pc_addr); | |
589 } | |
590 | |
591 #ifdef _LP64 | |
592 #ifdef ASSERT | |
593 // Make sure that we have an odd stack | |
594 Label StackOk; | |
595 andcc(last_java_sp, 0x01, G0); | |
596 br(Assembler::notZero, false, Assembler::pt, StackOk); | |
597 delayed()->nop(); | |
598 STOP("Stack Not Biased in set_last_Java_frame"); | |
599 bind(StackOk); | |
600 #endif // ASSERT | |
601 assert( last_java_sp != G4_scratch, "bad register usage in set_last_Java_frame"); | |
602 add( last_java_sp, STACK_BIAS, G4_scratch ); | |
603 st_ptr(G4_scratch, G2_thread, JavaThread::last_Java_sp_offset()); | |
604 #else | |
605 st_ptr(last_java_sp, G2_thread, JavaThread::last_Java_sp_offset()); | |
606 #endif // _LP64 | |
607 } | |
608 | |
609 void MacroAssembler::reset_last_Java_frame(void) { | |
610 assert_not_delayed(); | |
611 | |
612 Address sp_addr(G2_thread, JavaThread::last_Java_sp_offset()); | |
613 Address pc_addr(G2_thread, JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()); | |
614 Address flags (G2_thread, JavaThread::frame_anchor_offset() + JavaFrameAnchor::flags_offset()); | |
615 | |
616 #ifdef ASSERT | |
617 // check that it WAS previously set | |
618 #ifdef CC_INTERP | |
619 save_frame(0); | |
620 #else | |
621 save_frame_and_mov(0, Lmethod, Lmethod); // Propagate Lmethod to helper frame for -Xprof | |
622 #endif /* CC_INTERP */ | |
623 ld_ptr(sp_addr, L0); | |
624 tst(L0); | |
625 breakpoint_trap(Assembler::zero, Assembler::ptr_cc); | |
626 restore(); | |
627 #endif // ASSERT | |
628 | |
629 st_ptr(G0, sp_addr); | |
630 // Always return last_Java_pc to zero | |
631 st_ptr(G0, pc_addr); | |
632 // Always null flags after return to Java | |
633 st(G0, flags); | |
634 } | |
635 | |
636 | |
637 void MacroAssembler::call_VM_base( | |
638 Register oop_result, | |
639 Register thread_cache, | |
640 Register last_java_sp, | |
641 address entry_point, | |
642 int number_of_arguments, | |
643 bool check_exceptions) | |
644 { | |
645 assert_not_delayed(); | |
646 | |
647 // determine last_java_sp register | |
648 if (!last_java_sp->is_valid()) { | |
649 last_java_sp = SP; | |
650 } | |
651 // debugging support | |
652 assert(number_of_arguments >= 0 , "cannot have negative number of arguments"); | |
653 | |
654 // 64-bit last_java_sp is biased! | |
655 set_last_Java_frame(last_java_sp, noreg); | |
656 if (VerifyThread) mov(G2_thread, O0); // about to be smashed; pass early | |
657 save_thread(thread_cache); | |
658 // do the call | |
659 call(entry_point, relocInfo::runtime_call_type); | |
660 if (!VerifyThread) | |
661 delayed()->mov(G2_thread, O0); // pass thread as first argument | |
662 else | |
663 delayed()->nop(); // (thread already passed) | |
664 restore_thread(thread_cache); | |
665 reset_last_Java_frame(); | |
666 | |
667 // check for pending exceptions. use Gtemp as scratch register. | |
668 if (check_exceptions) { | |
669 check_and_forward_exception(Gtemp); | |
670 } | |
671 | |
672 #ifdef ASSERT | |
673 set(badHeapWordVal, G3); | |
674 set(badHeapWordVal, G4); | |
675 set(badHeapWordVal, G5); | |
676 #endif | |
677 | |
678 // get oop result if there is one and reset the value in the thread | |
679 if (oop_result->is_valid()) { | |
680 get_vm_result(oop_result); | |
681 } | |
682 } | |
683 | |
684 void MacroAssembler::check_and_forward_exception(Register scratch_reg) | |
685 { | |
686 Label L; | |
687 | |
688 check_and_handle_popframe(scratch_reg); | |
689 check_and_handle_earlyret(scratch_reg); | |
690 | |
691 Address exception_addr(G2_thread, Thread::pending_exception_offset()); | |
692 ld_ptr(exception_addr, scratch_reg); | |
693 br_null_short(scratch_reg, pt, L); | |
694 // we use O7 linkage so that forward_exception_entry has the issuing PC | |
695 call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type); | |
696 delayed()->nop(); | |
697 bind(L); | |
698 } | |
699 | |
700 | |
701 void MacroAssembler::check_and_handle_popframe(Register scratch_reg) { | |
702 } | |
703 | |
704 | |
705 void MacroAssembler::check_and_handle_earlyret(Register scratch_reg) { | |
706 } | |
707 | |
708 | |
709 void MacroAssembler::call_VM(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions) { | |
710 call_VM_base(oop_result, noreg, noreg, entry_point, number_of_arguments, check_exceptions); | |
711 } | |
712 | |
713 | |
714 void MacroAssembler::call_VM(Register oop_result, address entry_point, Register arg_1, bool check_exceptions) { | |
715 // O0 is reserved for the thread | |
716 mov(arg_1, O1); | |
717 call_VM(oop_result, entry_point, 1, check_exceptions); | |
718 } | |
719 | |
720 | |
721 void MacroAssembler::call_VM(Register oop_result, address entry_point, Register arg_1, Register arg_2, bool check_exceptions) { | |
722 // O0 is reserved for the thread | |
723 mov(arg_1, O1); | |
724 mov(arg_2, O2); assert(arg_2 != O1, "smashed argument"); | |
725 call_VM(oop_result, entry_point, 2, check_exceptions); | |
726 } | |
727 | |
728 | |
729 void MacroAssembler::call_VM(Register oop_result, address entry_point, Register arg_1, Register arg_2, Register arg_3, bool check_exceptions) { | |
730 // O0 is reserved for the thread | |
731 mov(arg_1, O1); | |
732 mov(arg_2, O2); assert(arg_2 != O1, "smashed argument"); | |
733 mov(arg_3, O3); assert(arg_3 != O1 && arg_3 != O2, "smashed argument"); | |
734 call_VM(oop_result, entry_point, 3, check_exceptions); | |
735 } | |
736 | |
737 | |
738 | |
739 // Note: The following call_VM overloadings are useful when a "save" | |
740 // has already been performed by a stub, and the last Java frame is | |
741 // the previous one. In that case, last_java_sp must be passed as FP | |
742 // instead of SP. | |
743 | |
744 | |
745 void MacroAssembler::call_VM(Register oop_result, Register last_java_sp, address entry_point, int number_of_arguments, bool check_exceptions) { | |
746 call_VM_base(oop_result, noreg, last_java_sp, entry_point, number_of_arguments, check_exceptions); | |
747 } | |
748 | |
749 | |
750 void MacroAssembler::call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, bool check_exceptions) { | |
751 // O0 is reserved for the thread | |
752 mov(arg_1, O1); | |
753 call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions); | |
754 } | |
755 | |
756 | |
757 void MacroAssembler::call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, Register arg_2, bool check_exceptions) { | |
758 // O0 is reserved for the thread | |
759 mov(arg_1, O1); | |
760 mov(arg_2, O2); assert(arg_2 != O1, "smashed argument"); | |
761 call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions); | |
762 } | |
763 | |
764 | |
765 void MacroAssembler::call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, Register arg_2, Register arg_3, bool check_exceptions) { | |
766 // O0 is reserved for the thread | |
767 mov(arg_1, O1); | |
768 mov(arg_2, O2); assert(arg_2 != O1, "smashed argument"); | |
769 mov(arg_3, O3); assert(arg_3 != O1 && arg_3 != O2, "smashed argument"); | |
770 call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions); | |
771 } | |
772 | |
773 | |
774 | |
775 void MacroAssembler::call_VM_leaf_base(Register thread_cache, address entry_point, int number_of_arguments) { | |
776 assert_not_delayed(); | |
777 save_thread(thread_cache); | |
778 // do the call | |
779 call(entry_point, relocInfo::runtime_call_type); | |
780 delayed()->nop(); | |
781 restore_thread(thread_cache); | |
782 #ifdef ASSERT | |
783 set(badHeapWordVal, G3); | |
784 set(badHeapWordVal, G4); | |
785 set(badHeapWordVal, G5); | |
786 #endif | |
787 } | |
788 | |
789 | |
790 void MacroAssembler::call_VM_leaf(Register thread_cache, address entry_point, int number_of_arguments) { | |
791 call_VM_leaf_base(thread_cache, entry_point, number_of_arguments); | |
792 } | |
793 | |
794 | |
795 void MacroAssembler::call_VM_leaf(Register thread_cache, address entry_point, Register arg_1) { | |
796 mov(arg_1, O0); | |
797 call_VM_leaf(thread_cache, entry_point, 1); | |
798 } | |
799 | |
800 | |
801 void MacroAssembler::call_VM_leaf(Register thread_cache, address entry_point, Register arg_1, Register arg_2) { | |
802 mov(arg_1, O0); | |
803 mov(arg_2, O1); assert(arg_2 != O0, "smashed argument"); | |
804 call_VM_leaf(thread_cache, entry_point, 2); | |
805 } | |
806 | |
807 | |
808 void MacroAssembler::call_VM_leaf(Register thread_cache, address entry_point, Register arg_1, Register arg_2, Register arg_3) { | |
809 mov(arg_1, O0); | |
810 mov(arg_2, O1); assert(arg_2 != O0, "smashed argument"); | |
811 mov(arg_3, O2); assert(arg_3 != O0 && arg_3 != O1, "smashed argument"); | |
812 call_VM_leaf(thread_cache, entry_point, 3); | |
813 } | |
814 | |
815 | |
816 void MacroAssembler::get_vm_result(Register oop_result) { | |
817 verify_thread(); | |
818 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset()); | |
819 ld_ptr( vm_result_addr, oop_result); | |
820 st_ptr(G0, vm_result_addr); | |
821 verify_oop(oop_result); | |
822 } | |
823 | |
824 | |
825 void MacroAssembler::get_vm_result_2(Register metadata_result) { | |
826 verify_thread(); | |
827 Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset()); | |
828 ld_ptr(vm_result_addr_2, metadata_result); | |
829 st_ptr(G0, vm_result_addr_2); | |
830 } | |
831 | |
832 | |
833 // We require that C code which does not return a value in vm_result will | |
834 // leave it undisturbed. | |
835 void MacroAssembler::set_vm_result(Register oop_result) { | |
836 verify_thread(); | |
837 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset()); | |
838 verify_oop(oop_result); | |
839 | |
840 # ifdef ASSERT | |
841 // Check that we are not overwriting any other oop. | |
842 #ifdef CC_INTERP | |
843 save_frame(0); | |
844 #else | |
845 save_frame_and_mov(0, Lmethod, Lmethod); // Propagate Lmethod for -Xprof | |
846 #endif /* CC_INTERP */ | |
847 ld_ptr(vm_result_addr, L0); | |
848 tst(L0); | |
849 restore(); | |
850 breakpoint_trap(notZero, Assembler::ptr_cc); | |
851 // } | |
852 # endif | |
853 | |
854 st_ptr(oop_result, vm_result_addr); | |
855 } | |
856 | |
857 | |
858 void MacroAssembler::ic_call(address entry, bool emit_delay) { | |
859 RelocationHolder rspec = virtual_call_Relocation::spec(pc()); | |
860 patchable_set((intptr_t)Universe::non_oop_word(), G5_inline_cache_reg); | |
861 relocate(rspec); | |
862 call(entry, relocInfo::none); | |
863 if (emit_delay) { | |
864 delayed()->nop(); | |
865 } | |
866 } | |
867 | |
868 | |
869 void MacroAssembler::card_table_write(jbyte* byte_map_base, | |
870 Register tmp, Register obj) { | |
871 #ifdef _LP64 | |
872 srlx(obj, CardTableModRefBS::card_shift, obj); | |
873 #else | |
874 srl(obj, CardTableModRefBS::card_shift, obj); | |
875 #endif | |
876 assert(tmp != obj, "need separate temp reg"); | |
877 set((address) byte_map_base, tmp); | |
878 stb(G0, tmp, obj); | |
879 } | |
880 | |
881 | |
882 void MacroAssembler::internal_sethi(const AddressLiteral& addrlit, Register d, bool ForceRelocatable) { | |
883 address save_pc; | |
884 int shiftcnt; | |
885 #ifdef _LP64 | |
886 # ifdef CHECK_DELAY | |
887 assert_not_delayed((char*) "cannot put two instructions in delay slot"); | |
888 # endif | |
889 v9_dep(); | |
890 save_pc = pc(); | |
891 | |
892 int msb32 = (int) (addrlit.value() >> 32); | |
893 int lsb32 = (int) (addrlit.value()); | |
894 | |
895 if (msb32 == 0 && lsb32 >= 0) { | |
896 Assembler::sethi(lsb32, d, addrlit.rspec()); | |
897 } | |
898 else if (msb32 == -1) { | |
899 Assembler::sethi(~lsb32, d, addrlit.rspec()); | |
900 xor3(d, ~low10(~0), d); | |
901 } | |
902 else { | |
903 Assembler::sethi(msb32, d, addrlit.rspec()); // msb 22-bits | |
904 if (msb32 & 0x3ff) // Any bits? | |
905 or3(d, msb32 & 0x3ff, d); // msb 32-bits are now in lsb 32 | |
906 if (lsb32 & 0xFFFFFC00) { // done? | |
907 if ((lsb32 >> 20) & 0xfff) { // Any bits set? | |
908 sllx(d, 12, d); // Make room for next 12 bits | |
909 or3(d, (lsb32 >> 20) & 0xfff, d); // Or in next 12 | |
910 shiftcnt = 0; // We already shifted | |
911 } | |
912 else | |
913 shiftcnt = 12; | |
914 if ((lsb32 >> 10) & 0x3ff) { | |
915 sllx(d, shiftcnt + 10, d); // Make room for last 10 bits | |
916 or3(d, (lsb32 >> 10) & 0x3ff, d); // Or in next 10 | |
917 shiftcnt = 0; | |
918 } | |
919 else | |
920 shiftcnt = 10; | |
921 sllx(d, shiftcnt + 10, d); // Shift leaving disp field 0'd | |
922 } | |
923 else | |
924 sllx(d, 32, d); | |
925 } | |
926 // Pad out the instruction sequence so it can be patched later. | |
927 if (ForceRelocatable || (addrlit.rtype() != relocInfo::none && | |
928 addrlit.rtype() != relocInfo::runtime_call_type)) { | |
929 while (pc() < (save_pc + (7 * BytesPerInstWord))) | |
930 nop(); | |
931 } | |
932 #else | |
933 Assembler::sethi(addrlit.value(), d, addrlit.rspec()); | |
934 #endif | |
935 } | |
936 | |
937 | |
938 void MacroAssembler::sethi(const AddressLiteral& addrlit, Register d) { | |
939 internal_sethi(addrlit, d, false); | |
940 } | |
941 | |
942 | |
943 void MacroAssembler::patchable_sethi(const AddressLiteral& addrlit, Register d) { | |
944 internal_sethi(addrlit, d, true); | |
945 } | |
946 | |
947 | |
948 int MacroAssembler::insts_for_sethi(address a, bool worst_case) { | |
949 #ifdef _LP64 | |
950 if (worst_case) return 7; | |
951 intptr_t iaddr = (intptr_t) a; | |
952 int msb32 = (int) (iaddr >> 32); | |
953 int lsb32 = (int) (iaddr); | |
954 int count; | |
955 if (msb32 == 0 && lsb32 >= 0) | |
956 count = 1; | |
957 else if (msb32 == -1) | |
958 count = 2; | |
959 else { | |
960 count = 2; | |
961 if (msb32 & 0x3ff) | |
962 count++; | |
963 if (lsb32 & 0xFFFFFC00 ) { | |
964 if ((lsb32 >> 20) & 0xfff) count += 2; | |
965 if ((lsb32 >> 10) & 0x3ff) count += 2; | |
966 } | |
967 } | |
968 return count; | |
969 #else | |
970 return 1; | |
971 #endif | |
972 } | |
973 | |
974 int MacroAssembler::worst_case_insts_for_set() { | |
975 return insts_for_sethi(NULL, true) + 1; | |
976 } | |
977 | |
978 | |
979 // Keep in sync with MacroAssembler::insts_for_internal_set | |
980 void MacroAssembler::internal_set(const AddressLiteral& addrlit, Register d, bool ForceRelocatable) { | |
981 intptr_t value = addrlit.value(); | |
982 | |
983 if (!ForceRelocatable && addrlit.rspec().type() == relocInfo::none) { | |
984 // can optimize | |
985 if (-4096 <= value && value <= 4095) { | |
986 or3(G0, value, d); // setsw (this leaves upper 32 bits sign-extended) | |
987 return; | |
988 } | |
989 if (inv_hi22(hi22(value)) == value) { | |
990 sethi(addrlit, d); | |
991 return; | |
992 } | |
993 } | |
994 assert_not_delayed((char*) "cannot put two instructions in delay slot"); | |
995 internal_sethi(addrlit, d, ForceRelocatable); | |
996 if (ForceRelocatable || addrlit.rspec().type() != relocInfo::none || addrlit.low10() != 0) { | |
997 add(d, addrlit.low10(), d, addrlit.rspec()); | |
998 } | |
999 } | |
1000 | |
1001 // Keep in sync with MacroAssembler::internal_set | |
1002 int MacroAssembler::insts_for_internal_set(intptr_t value) { | |
1003 // can optimize | |
1004 if (-4096 <= value && value <= 4095) { | |
1005 return 1; | |
1006 } | |
1007 if (inv_hi22(hi22(value)) == value) { | |
1008 return insts_for_sethi((address) value); | |
1009 } | |
1010 int count = insts_for_sethi((address) value); | |
1011 AddressLiteral al(value); | |
1012 if (al.low10() != 0) { | |
1013 count++; | |
1014 } | |
1015 return count; | |
1016 } | |
1017 | |
1018 void MacroAssembler::set(const AddressLiteral& al, Register d) { | |
1019 internal_set(al, d, false); | |
1020 } | |
1021 | |
1022 void MacroAssembler::set(intptr_t value, Register d) { | |
1023 AddressLiteral al(value); | |
1024 internal_set(al, d, false); | |
1025 } | |
1026 | |
1027 void MacroAssembler::set(address addr, Register d, RelocationHolder const& rspec) { | |
1028 AddressLiteral al(addr, rspec); | |
1029 internal_set(al, d, false); | |
1030 } | |
1031 | |
1032 void MacroAssembler::patchable_set(const AddressLiteral& al, Register d) { | |
1033 internal_set(al, d, true); | |
1034 } | |
1035 | |
1036 void MacroAssembler::patchable_set(intptr_t value, Register d) { | |
1037 AddressLiteral al(value); | |
1038 internal_set(al, d, true); | |
1039 } | |
1040 | |
1041 | |
1042 void MacroAssembler::set64(jlong value, Register d, Register tmp) { | |
1043 assert_not_delayed(); | |
1044 v9_dep(); | |
1045 | |
1046 int hi = (int)(value >> 32); | |
1047 int lo = (int)(value & ~0); | |
1048 // (Matcher::isSimpleConstant64 knows about the following optimizations.) | |
1049 if (Assembler::is_simm13(lo) && value == lo) { | |
1050 or3(G0, lo, d); | |
1051 } else if (hi == 0) { | |
1052 Assembler::sethi(lo, d); // hardware version zero-extends to upper 32 | |
1053 if (low10(lo) != 0) | |
1054 or3(d, low10(lo), d); | |
1055 } | |
1056 else if (hi == -1) { | |
1057 Assembler::sethi(~lo, d); // hardware version zero-extends to upper 32 | |
1058 xor3(d, low10(lo) ^ ~low10(~0), d); | |
1059 } | |
1060 else if (lo == 0) { | |
1061 if (Assembler::is_simm13(hi)) { | |
1062 or3(G0, hi, d); | |
1063 } else { | |
1064 Assembler::sethi(hi, d); // hardware version zero-extends to upper 32 | |
1065 if (low10(hi) != 0) | |
1066 or3(d, low10(hi), d); | |
1067 } | |
1068 sllx(d, 32, d); | |
1069 } | |
1070 else { | |
1071 Assembler::sethi(hi, tmp); | |
1072 Assembler::sethi(lo, d); // macro assembler version sign-extends | |
1073 if (low10(hi) != 0) | |
1074 or3 (tmp, low10(hi), tmp); | |
1075 if (low10(lo) != 0) | |
1076 or3 ( d, low10(lo), d); | |
1077 sllx(tmp, 32, tmp); | |
1078 or3 (d, tmp, d); | |
1079 } | |
1080 } | |
1081 | |
1082 int MacroAssembler::insts_for_set64(jlong value) { | |
1083 v9_dep(); | |
1084 | |
1085 int hi = (int) (value >> 32); | |
1086 int lo = (int) (value & ~0); | |
1087 int count = 0; | |
1088 | |
1089 // (Matcher::isSimpleConstant64 knows about the following optimizations.) | |
1090 if (Assembler::is_simm13(lo) && value == lo) { | |
1091 count++; | |
1092 } else if (hi == 0) { | |
1093 count++; | |
1094 if (low10(lo) != 0) | |
1095 count++; | |
1096 } | |
1097 else if (hi == -1) { | |
1098 count += 2; | |
1099 } | |
1100 else if (lo == 0) { | |
1101 if (Assembler::is_simm13(hi)) { | |
1102 count++; | |
1103 } else { | |
1104 count++; | |
1105 if (low10(hi) != 0) | |
1106 count++; | |
1107 } | |
1108 count++; | |
1109 } | |
1110 else { | |
1111 count += 2; | |
1112 if (low10(hi) != 0) | |
1113 count++; | |
1114 if (low10(lo) != 0) | |
1115 count++; | |
1116 count += 2; | |
1117 } | |
1118 return count; | |
1119 } | |
1120 | |
1121 // compute size in bytes of sparc frame, given | |
1122 // number of extraWords | |
1123 int MacroAssembler::total_frame_size_in_bytes(int extraWords) { | |
1124 | |
1125 int nWords = frame::memory_parameter_word_sp_offset; | |
1126 | |
1127 nWords += extraWords; | |
1128 | |
1129 if (nWords & 1) ++nWords; // round up to double-word | |
1130 | |
1131 return nWords * BytesPerWord; | |
1132 } | |
1133 | |
1134 | |
1135 // save_frame: given number of "extra" words in frame, | |
1136 // issue approp. save instruction (p 200, v8 manual) | |
1137 | |
1138 void MacroAssembler::save_frame(int extraWords) { | |
1139 int delta = -total_frame_size_in_bytes(extraWords); | |
1140 if (is_simm13(delta)) { | |
1141 save(SP, delta, SP); | |
1142 } else { | |
1143 set(delta, G3_scratch); | |
1144 save(SP, G3_scratch, SP); | |
1145 } | |
1146 } | |
1147 | |
1148 | |
1149 void MacroAssembler::save_frame_c1(int size_in_bytes) { | |
1150 if (is_simm13(-size_in_bytes)) { | |
1151 save(SP, -size_in_bytes, SP); | |
1152 } else { | |
1153 set(-size_in_bytes, G3_scratch); | |
1154 save(SP, G3_scratch, SP); | |
1155 } | |
1156 } | |
1157 | |
1158 | |
1159 void MacroAssembler::save_frame_and_mov(int extraWords, | |
1160 Register s1, Register d1, | |
1161 Register s2, Register d2) { | |
1162 assert_not_delayed(); | |
1163 | |
1164 // The trick here is to use precisely the same memory word | |
1165 // that trap handlers also use to save the register. | |
1166 // This word cannot be used for any other purpose, but | |
1167 // it works fine to save the register's value, whether or not | |
1168 // an interrupt flushes register windows at any given moment! | |
1169 Address s1_addr; | |
1170 if (s1->is_valid() && (s1->is_in() || s1->is_local())) { | |
1171 s1_addr = s1->address_in_saved_window(); | |
1172 st_ptr(s1, s1_addr); | |
1173 } | |
1174 | |
1175 Address s2_addr; | |
1176 if (s2->is_valid() && (s2->is_in() || s2->is_local())) { | |
1177 s2_addr = s2->address_in_saved_window(); | |
1178 st_ptr(s2, s2_addr); | |
1179 } | |
1180 | |
1181 save_frame(extraWords); | |
1182 | |
1183 if (s1_addr.base() == SP) { | |
1184 ld_ptr(s1_addr.after_save(), d1); | |
1185 } else if (s1->is_valid()) { | |
1186 mov(s1->after_save(), d1); | |
1187 } | |
1188 | |
1189 if (s2_addr.base() == SP) { | |
1190 ld_ptr(s2_addr.after_save(), d2); | |
1191 } else if (s2->is_valid()) { | |
1192 mov(s2->after_save(), d2); | |
1193 } | |
1194 } | |
1195 | |
1196 | |
1197 AddressLiteral MacroAssembler::allocate_metadata_address(Metadata* obj) { | |
1198 assert(oop_recorder() != NULL, "this assembler needs a Recorder"); | |
1199 int index = oop_recorder()->allocate_metadata_index(obj); | |
1200 RelocationHolder rspec = metadata_Relocation::spec(index); | |
1201 return AddressLiteral((address)obj, rspec); | |
1202 } | |
1203 | |
1204 AddressLiteral MacroAssembler::constant_metadata_address(Metadata* obj) { | |
1205 assert(oop_recorder() != NULL, "this assembler needs a Recorder"); | |
1206 int index = oop_recorder()->find_index(obj); | |
1207 RelocationHolder rspec = metadata_Relocation::spec(index); | |
1208 return AddressLiteral((address)obj, rspec); | |
1209 } | |
1210 | |
1211 | |
1212 AddressLiteral MacroAssembler::constant_oop_address(jobject obj) { | |
1213 assert(oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
1214 assert(Universe::heap()->is_in_reserved(JNIHandles::resolve(obj)), "not an oop"); | |
1215 int oop_index = oop_recorder()->find_index(obj); | |
1216 return AddressLiteral(obj, oop_Relocation::spec(oop_index)); | |
1217 } | |
1218 | |
1219 void MacroAssembler::set_narrow_oop(jobject obj, Register d) { | |
1220 assert(oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
1221 int oop_index = oop_recorder()->find_index(obj); | |
1222 RelocationHolder rspec = oop_Relocation::spec(oop_index); | |
1223 | |
1224 assert_not_delayed(); | |
1225 // Relocation with special format (see relocInfo_sparc.hpp). | |
1226 relocate(rspec, 1); | |
1227 // Assembler::sethi(0x3fffff, d); | |
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1228 emit_int32( op(branch_op) | rd(d) | op2(sethi_op2) | hi22(0x3fffff) ); |
7204 | 1229 // Don't add relocation for 'add'. Do patching during 'sethi' processing. |
1230 add(d, 0x3ff, d); | |
1231 | |
1232 } | |
1233 | |
1234 void MacroAssembler::set_narrow_klass(Klass* k, Register d) { | |
1235 assert(oop_recorder() != NULL, "this assembler needs an OopRecorder"); | |
1236 int klass_index = oop_recorder()->find_index(k); | |
1237 RelocationHolder rspec = metadata_Relocation::spec(klass_index); | |
1238 narrowOop encoded_k = oopDesc::encode_klass(k); | |
1239 | |
1240 assert_not_delayed(); | |
1241 // Relocation with special format (see relocInfo_sparc.hpp). | |
1242 relocate(rspec, 1); | |
1243 // Assembler::sethi(encoded_k, d); | |
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1244 emit_int32( op(branch_op) | rd(d) | op2(sethi_op2) | hi22(encoded_k) ); |
7204 | 1245 // Don't add relocation for 'add'. Do patching during 'sethi' processing. |
1246 add(d, low10(encoded_k), d); | |
1247 | |
1248 } | |
1249 | |
1250 void MacroAssembler::align(int modulus) { | |
1251 while (offset() % modulus != 0) nop(); | |
1252 } | |
1253 | |
1254 | |
1255 void MacroAssembler::safepoint() { | |
1256 relocate(breakpoint_Relocation::spec(breakpoint_Relocation::safepoint)); | |
1257 } | |
1258 | |
1259 | |
1260 void RegistersForDebugging::print(outputStream* s) { | |
1261 FlagSetting fs(Debugging, true); | |
1262 int j; | |
1263 for (j = 0; j < 8; ++j) { | |
1264 if (j != 6) { s->print("i%d = ", j); os::print_location(s, i[j]); } | |
1265 else { s->print( "fp = " ); os::print_location(s, i[j]); } | |
1266 } | |
1267 s->cr(); | |
1268 | |
1269 for (j = 0; j < 8; ++j) { | |
1270 s->print("l%d = ", j); os::print_location(s, l[j]); | |
1271 } | |
1272 s->cr(); | |
1273 | |
1274 for (j = 0; j < 8; ++j) { | |
1275 if (j != 6) { s->print("o%d = ", j); os::print_location(s, o[j]); } | |
1276 else { s->print( "sp = " ); os::print_location(s, o[j]); } | |
1277 } | |
1278 s->cr(); | |
1279 | |
1280 for (j = 0; j < 8; ++j) { | |
1281 s->print("g%d = ", j); os::print_location(s, g[j]); | |
1282 } | |
1283 s->cr(); | |
1284 | |
1285 // print out floats with compression | |
1286 for (j = 0; j < 32; ) { | |
1287 jfloat val = f[j]; | |
1288 int last = j; | |
1289 for ( ; last+1 < 32; ++last ) { | |
1290 char b1[1024], b2[1024]; | |
1291 sprintf(b1, "%f", val); | |
1292 sprintf(b2, "%f", f[last+1]); | |
1293 if (strcmp(b1, b2)) | |
1294 break; | |
1295 } | |
1296 s->print("f%d", j); | |
1297 if ( j != last ) s->print(" - f%d", last); | |
1298 s->print(" = %f", val); | |
1299 s->fill_to(25); | |
1300 s->print_cr(" (0x%x)", val); | |
1301 j = last + 1; | |
1302 } | |
1303 s->cr(); | |
1304 | |
1305 // and doubles (evens only) | |
1306 for (j = 0; j < 32; ) { | |
1307 jdouble val = d[j]; | |
1308 int last = j; | |
1309 for ( ; last+1 < 32; ++last ) { | |
1310 char b1[1024], b2[1024]; | |
1311 sprintf(b1, "%f", val); | |
1312 sprintf(b2, "%f", d[last+1]); | |
1313 if (strcmp(b1, b2)) | |
1314 break; | |
1315 } | |
1316 s->print("d%d", 2 * j); | |
1317 if ( j != last ) s->print(" - d%d", last); | |
1318 s->print(" = %f", val); | |
1319 s->fill_to(30); | |
1320 s->print("(0x%x)", *(int*)&val); | |
1321 s->fill_to(42); | |
1322 s->print_cr("(0x%x)", *(1 + (int*)&val)); | |
1323 j = last + 1; | |
1324 } | |
1325 s->cr(); | |
1326 } | |
1327 | |
1328 void RegistersForDebugging::save_registers(MacroAssembler* a) { | |
1329 a->sub(FP, round_to(sizeof(RegistersForDebugging), sizeof(jdouble)) - STACK_BIAS, O0); | |
1330 a->flush_windows(); | |
1331 int i; | |
1332 for (i = 0; i < 8; ++i) { | |
1333 a->ld_ptr(as_iRegister(i)->address_in_saved_window().after_save(), L1); a->st_ptr( L1, O0, i_offset(i)); | |
1334 a->ld_ptr(as_lRegister(i)->address_in_saved_window().after_save(), L1); a->st_ptr( L1, O0, l_offset(i)); | |
1335 a->st_ptr(as_oRegister(i)->after_save(), O0, o_offset(i)); | |
1336 a->st_ptr(as_gRegister(i)->after_save(), O0, g_offset(i)); | |
1337 } | |
1338 for (i = 0; i < 32; ++i) { | |
1339 a->stf(FloatRegisterImpl::S, as_FloatRegister(i), O0, f_offset(i)); | |
1340 } | |
1341 for (i = 0; i < (VM_Version::v9_instructions_work() ? 64 : 32); i += 2) { | |
1342 a->stf(FloatRegisterImpl::D, as_FloatRegister(i), O0, d_offset(i)); | |
1343 } | |
1344 } | |
1345 | |
1346 void RegistersForDebugging::restore_registers(MacroAssembler* a, Register r) { | |
1347 for (int i = 1; i < 8; ++i) { | |
1348 a->ld_ptr(r, g_offset(i), as_gRegister(i)); | |
1349 } | |
1350 for (int j = 0; j < 32; ++j) { | |
1351 a->ldf(FloatRegisterImpl::S, O0, f_offset(j), as_FloatRegister(j)); | |
1352 } | |
1353 for (int k = 0; k < (VM_Version::v9_instructions_work() ? 64 : 32); k += 2) { | |
1354 a->ldf(FloatRegisterImpl::D, O0, d_offset(k), as_FloatRegister(k)); | |
1355 } | |
1356 } | |
1357 | |
1358 | |
1359 // pushes double TOS element of FPU stack on CPU stack; pops from FPU stack | |
1360 void MacroAssembler::push_fTOS() { | |
1361 // %%%%%% need to implement this | |
1362 } | |
1363 | |
1364 // pops double TOS element from CPU stack and pushes on FPU stack | |
1365 void MacroAssembler::pop_fTOS() { | |
1366 // %%%%%% need to implement this | |
1367 } | |
1368 | |
1369 void MacroAssembler::empty_FPU_stack() { | |
1370 // %%%%%% need to implement this | |
1371 } | |
1372 | |
1373 void MacroAssembler::_verify_oop(Register reg, const char* msg, const char * file, int line) { | |
1374 // plausibility check for oops | |
1375 if (!VerifyOops) return; | |
1376 | |
1377 if (reg == G0) return; // always NULL, which is always an oop | |
1378 | |
1379 BLOCK_COMMENT("verify_oop {"); | |
1380 char buffer[64]; | |
1381 #ifdef COMPILER1 | |
1382 if (CommentedAssembly) { | |
1383 snprintf(buffer, sizeof(buffer), "verify_oop at %d", offset()); | |
1384 block_comment(buffer); | |
1385 } | |
1386 #endif | |
1387 | |
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1388 const char* real_msg = NULL; |
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1389 { |
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1390 ResourceMark rm; |
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1391 stringStream ss; |
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1392 ss.print("%s at offset %d (%s:%d)", msg, offset(), file, line); |
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1393 real_msg = code_string(ss.as_string()); |
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1394 } |
7204 | 1395 |
1396 // Call indirectly to solve generation ordering problem | |
1397 AddressLiteral a(StubRoutines::verify_oop_subroutine_entry_address()); | |
1398 | |
1399 // Make some space on stack above the current register window. | |
1400 // Enough to hold 8 64-bit registers. | |
1401 add(SP,-8*8,SP); | |
1402 | |
1403 // Save some 64-bit registers; a normal 'save' chops the heads off | |
1404 // of 64-bit longs in the 32-bit build. | |
1405 stx(O0,SP,frame::register_save_words*wordSize+STACK_BIAS+0*8); | |
1406 stx(O1,SP,frame::register_save_words*wordSize+STACK_BIAS+1*8); | |
1407 mov(reg,O0); // Move arg into O0; arg might be in O7 which is about to be crushed | |
1408 stx(O7,SP,frame::register_save_words*wordSize+STACK_BIAS+7*8); | |
1409 | |
1410 // Size of set() should stay the same | |
1411 patchable_set((intptr_t)real_msg, O1); | |
1412 // Load address to call to into O7 | |
1413 load_ptr_contents(a, O7); | |
1414 // Register call to verify_oop_subroutine | |
1415 callr(O7, G0); | |
1416 delayed()->nop(); | |
1417 // recover frame size | |
1418 add(SP, 8*8,SP); | |
1419 BLOCK_COMMENT("} verify_oop"); | |
1420 } | |
1421 | |
1422 void MacroAssembler::_verify_oop_addr(Address addr, const char* msg, const char * file, int line) { | |
1423 // plausibility check for oops | |
1424 if (!VerifyOops) return; | |
1425 | |
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1426 const char* real_msg = NULL; |
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1427 { |
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1428 ResourceMark rm; |
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1429 stringStream ss; |
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1430 ss.print("%s at SP+%d (%s:%d)", msg, addr.disp(), file, line); |
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1431 real_msg = code_string(ss.as_string()); |
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1432 } |
7204 | 1433 |
1434 // Call indirectly to solve generation ordering problem | |
1435 AddressLiteral a(StubRoutines::verify_oop_subroutine_entry_address()); | |
1436 | |
1437 // Make some space on stack above the current register window. | |
1438 // Enough to hold 8 64-bit registers. | |
1439 add(SP,-8*8,SP); | |
1440 | |
1441 // Save some 64-bit registers; a normal 'save' chops the heads off | |
1442 // of 64-bit longs in the 32-bit build. | |
1443 stx(O0,SP,frame::register_save_words*wordSize+STACK_BIAS+0*8); | |
1444 stx(O1,SP,frame::register_save_words*wordSize+STACK_BIAS+1*8); | |
1445 ld_ptr(addr.base(), addr.disp() + 8*8, O0); // Load arg into O0; arg might be in O7 which is about to be crushed | |
1446 stx(O7,SP,frame::register_save_words*wordSize+STACK_BIAS+7*8); | |
1447 | |
1448 // Size of set() should stay the same | |
1449 patchable_set((intptr_t)real_msg, O1); | |
1450 // Load address to call to into O7 | |
1451 load_ptr_contents(a, O7); | |
1452 // Register call to verify_oop_subroutine | |
1453 callr(O7, G0); | |
1454 delayed()->nop(); | |
1455 // recover frame size | |
1456 add(SP, 8*8,SP); | |
1457 } | |
1458 | |
1459 // side-door communication with signalHandler in os_solaris.cpp | |
1460 address MacroAssembler::_verify_oop_implicit_branch[3] = { NULL }; | |
1461 | |
1462 // This macro is expanded just once; it creates shared code. Contract: | |
1463 // receives an oop in O0. Must restore O0 & O7 from TLS. Must not smash ANY | |
1464 // registers, including flags. May not use a register 'save', as this blows | |
1465 // the high bits of the O-regs if they contain Long values. Acts as a 'leaf' | |
1466 // call. | |
1467 void MacroAssembler::verify_oop_subroutine() { | |
1468 assert( VM_Version::v9_instructions_work(), "VerifyOops not supported for V8" ); | |
1469 | |
1470 // Leaf call; no frame. | |
1471 Label succeed, fail, null_or_fail; | |
1472 | |
1473 // O0 and O7 were saved already (O0 in O0's TLS home, O7 in O5's TLS home). | |
1474 // O0 is now the oop to be checked. O7 is the return address. | |
1475 Register O0_obj = O0; | |
1476 | |
1477 // Save some more registers for temps. | |
1478 stx(O2,SP,frame::register_save_words*wordSize+STACK_BIAS+2*8); | |
1479 stx(O3,SP,frame::register_save_words*wordSize+STACK_BIAS+3*8); | |
1480 stx(O4,SP,frame::register_save_words*wordSize+STACK_BIAS+4*8); | |
1481 stx(O5,SP,frame::register_save_words*wordSize+STACK_BIAS+5*8); | |
1482 | |
1483 // Save flags | |
1484 Register O5_save_flags = O5; | |
1485 rdccr( O5_save_flags ); | |
1486 | |
1487 { // count number of verifies | |
1488 Register O2_adr = O2; | |
1489 Register O3_accum = O3; | |
1490 inc_counter(StubRoutines::verify_oop_count_addr(), O2_adr, O3_accum); | |
1491 } | |
1492 | |
1493 Register O2_mask = O2; | |
1494 Register O3_bits = O3; | |
1495 Register O4_temp = O4; | |
1496 | |
1497 // mark lower end of faulting range | |
1498 assert(_verify_oop_implicit_branch[0] == NULL, "set once"); | |
1499 _verify_oop_implicit_branch[0] = pc(); | |
1500 | |
1501 // We can't check the mark oop because it could be in the process of | |
1502 // locking or unlocking while this is running. | |
1503 set(Universe::verify_oop_mask (), O2_mask); | |
1504 set(Universe::verify_oop_bits (), O3_bits); | |
1505 | |
1506 // assert((obj & oop_mask) == oop_bits); | |
1507 and3(O0_obj, O2_mask, O4_temp); | |
1508 cmp_and_brx_short(O4_temp, O3_bits, notEqual, pn, null_or_fail); | |
1509 | |
1510 if ((NULL_WORD & Universe::verify_oop_mask()) == Universe::verify_oop_bits()) { | |
1511 // the null_or_fail case is useless; must test for null separately | |
1512 br_null_short(O0_obj, pn, succeed); | |
1513 } | |
1514 | |
1515 // Check the Klass* of this object for being in the right area of memory. | |
1516 // Cannot do the load in the delay above slot in case O0 is null | |
1517 load_klass(O0_obj, O0_obj); | |
1518 // assert((klass != NULL) | |
1519 br_null_short(O0_obj, pn, fail); | |
1520 // TODO: Future assert that klass is lower 4g memory for UseCompressedKlassPointers | |
1521 | |
1522 wrccr( O5_save_flags ); // Restore CCR's | |
1523 | |
1524 // mark upper end of faulting range | |
1525 _verify_oop_implicit_branch[1] = pc(); | |
1526 | |
1527 //----------------------- | |
1528 // all tests pass | |
1529 bind(succeed); | |
1530 | |
1531 // Restore prior 64-bit registers | |
1532 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+0*8,O0); | |
1533 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+1*8,O1); | |
1534 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+2*8,O2); | |
1535 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+3*8,O3); | |
1536 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+4*8,O4); | |
1537 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+5*8,O5); | |
1538 | |
1539 retl(); // Leaf return; restore prior O7 in delay slot | |
1540 delayed()->ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+7*8,O7); | |
1541 | |
1542 //----------------------- | |
1543 bind(null_or_fail); // nulls are less common but OK | |
1544 br_null(O0_obj, false, pt, succeed); | |
1545 delayed()->wrccr( O5_save_flags ); // Restore CCR's | |
1546 | |
1547 //----------------------- | |
1548 // report failure: | |
1549 bind(fail); | |
1550 _verify_oop_implicit_branch[2] = pc(); | |
1551 | |
1552 wrccr( O5_save_flags ); // Restore CCR's | |
1553 | |
1554 save_frame(::round_to(sizeof(RegistersForDebugging) / BytesPerWord, 2)); | |
1555 | |
1556 // stop_subroutine expects message pointer in I1. | |
1557 mov(I1, O1); | |
1558 | |
1559 // Restore prior 64-bit registers | |
1560 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+0*8,I0); | |
1561 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+1*8,I1); | |
1562 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+2*8,I2); | |
1563 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+3*8,I3); | |
1564 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+4*8,I4); | |
1565 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+5*8,I5); | |
1566 | |
1567 // factor long stop-sequence into subroutine to save space | |
1568 assert(StubRoutines::Sparc::stop_subroutine_entry_address(), "hasn't been generated yet"); | |
1569 | |
1570 // call indirectly to solve generation ordering problem | |
1571 AddressLiteral al(StubRoutines::Sparc::stop_subroutine_entry_address()); | |
1572 load_ptr_contents(al, O5); | |
1573 jmpl(O5, 0, O7); | |
1574 delayed()->nop(); | |
1575 } | |
1576 | |
1577 | |
1578 void MacroAssembler::stop(const char* msg) { | |
1579 // save frame first to get O7 for return address | |
1580 // add one word to size in case struct is odd number of words long | |
1581 // It must be doubleword-aligned for storing doubles into it. | |
1582 | |
1583 save_frame(::round_to(sizeof(RegistersForDebugging) / BytesPerWord, 2)); | |
1584 | |
1585 // stop_subroutine expects message pointer in I1. | |
1586 // Size of set() should stay the same | |
1587 patchable_set((intptr_t)msg, O1); | |
1588 | |
1589 // factor long stop-sequence into subroutine to save space | |
1590 assert(StubRoutines::Sparc::stop_subroutine_entry_address(), "hasn't been generated yet"); | |
1591 | |
1592 // call indirectly to solve generation ordering problem | |
1593 AddressLiteral a(StubRoutines::Sparc::stop_subroutine_entry_address()); | |
1594 load_ptr_contents(a, O5); | |
1595 jmpl(O5, 0, O7); | |
1596 delayed()->nop(); | |
1597 | |
1598 breakpoint_trap(); // make stop actually stop rather than writing | |
1599 // unnoticeable results in the output files. | |
1600 | |
1601 // restore(); done in callee to save space! | |
1602 } | |
1603 | |
1604 | |
1605 void MacroAssembler::warn(const char* msg) { | |
1606 save_frame(::round_to(sizeof(RegistersForDebugging) / BytesPerWord, 2)); | |
1607 RegistersForDebugging::save_registers(this); | |
1608 mov(O0, L0); | |
1609 // Size of set() should stay the same | |
1610 patchable_set((intptr_t)msg, O0); | |
1611 call( CAST_FROM_FN_PTR(address, warning) ); | |
1612 delayed()->nop(); | |
1613 // ret(); | |
1614 // delayed()->restore(); | |
1615 RegistersForDebugging::restore_registers(this, L0); | |
1616 restore(); | |
1617 } | |
1618 | |
1619 | |
1620 void MacroAssembler::untested(const char* what) { | |
1621 // We must be able to turn interactive prompting off | |
1622 // in order to run automated test scripts on the VM | |
1623 // Use the flag ShowMessageBoxOnError | |
1624 | |
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1625 const char* b = NULL; |
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1626 { |
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1627 ResourceMark rm; |
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1628 stringStream ss; |
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1629 ss.print("untested: %s", what); |
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1630 b = code_string(ss.as_string()); |
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1631 } |
7204 | 1632 if (ShowMessageBoxOnError) { STOP(b); } |
1633 else { warn(b); } | |
1634 } | |
1635 | |
1636 | |
1637 void MacroAssembler::stop_subroutine() { | |
1638 RegistersForDebugging::save_registers(this); | |
1639 | |
1640 // for the sake of the debugger, stick a PC on the current frame | |
1641 // (this assumes that the caller has performed an extra "save") | |
1642 mov(I7, L7); | |
1643 add(O7, -7 * BytesPerInt, I7); | |
1644 | |
1645 save_frame(); // one more save to free up another O7 register | |
1646 mov(I0, O1); // addr of reg save area | |
1647 | |
1648 // We expect pointer to message in I1. Caller must set it up in O1 | |
1649 mov(I1, O0); // get msg | |
1650 call (CAST_FROM_FN_PTR(address, MacroAssembler::debug), relocInfo::runtime_call_type); | |
1651 delayed()->nop(); | |
1652 | |
1653 restore(); | |
1654 | |
1655 RegistersForDebugging::restore_registers(this, O0); | |
1656 | |
1657 save_frame(0); | |
1658 call(CAST_FROM_FN_PTR(address,breakpoint)); | |
1659 delayed()->nop(); | |
1660 restore(); | |
1661 | |
1662 mov(L7, I7); | |
1663 retl(); | |
1664 delayed()->restore(); // see stop above | |
1665 } | |
1666 | |
1667 | |
1668 void MacroAssembler::debug(char* msg, RegistersForDebugging* regs) { | |
1669 if ( ShowMessageBoxOnError ) { | |
1670 JavaThread* thread = JavaThread::current(); | |
1671 JavaThreadState saved_state = thread->thread_state(); | |
1672 thread->set_thread_state(_thread_in_vm); | |
1673 { | |
1674 // In order to get locks work, we need to fake a in_VM state | |
1675 ttyLocker ttyl; | |
1676 ::tty->print_cr("EXECUTION STOPPED: %s\n", msg); | |
1677 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { | |
1678 BytecodeCounter::print(); | |
1679 } | |
1680 if (os::message_box(msg, "Execution stopped, print registers?")) | |
1681 regs->print(::tty); | |
1682 } | |
1683 BREAKPOINT; | |
1684 ThreadStateTransition::transition(JavaThread::current(), _thread_in_vm, saved_state); | |
1685 } | |
1686 else { | |
1687 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", msg); | |
1688 } | |
1689 assert(false, err_msg("DEBUG MESSAGE: %s", msg)); | |
1690 } | |
1691 | |
1692 | |
1693 void MacroAssembler::calc_mem_param_words(Register Rparam_words, Register Rresult) { | |
1694 subcc( Rparam_words, Argument::n_register_parameters, Rresult); // how many mem words? | |
1695 Label no_extras; | |
1696 br( negative, true, pt, no_extras ); // if neg, clear reg | |
1697 delayed()->set(0, Rresult); // annuled, so only if taken | |
1698 bind( no_extras ); | |
1699 } | |
1700 | |
1701 | |
1702 void MacroAssembler::calc_frame_size(Register Rextra_words, Register Rresult) { | |
1703 #ifdef _LP64 | |
1704 add(Rextra_words, frame::memory_parameter_word_sp_offset, Rresult); | |
1705 #else | |
1706 add(Rextra_words, frame::memory_parameter_word_sp_offset + 1, Rresult); | |
1707 #endif | |
1708 bclr(1, Rresult); | |
1709 sll(Rresult, LogBytesPerWord, Rresult); // Rresult has total frame bytes | |
1710 } | |
1711 | |
1712 | |
1713 void MacroAssembler::calc_frame_size_and_save(Register Rextra_words, Register Rresult) { | |
1714 calc_frame_size(Rextra_words, Rresult); | |
1715 neg(Rresult); | |
1716 save(SP, Rresult, SP); | |
1717 } | |
1718 | |
1719 | |
1720 // --------------------------------------------------------- | |
1721 Assembler::RCondition cond2rcond(Assembler::Condition c) { | |
1722 switch (c) { | |
1723 /*case zero: */ | |
1724 case Assembler::equal: return Assembler::rc_z; | |
1725 case Assembler::lessEqual: return Assembler::rc_lez; | |
1726 case Assembler::less: return Assembler::rc_lz; | |
1727 /*case notZero:*/ | |
1728 case Assembler::notEqual: return Assembler::rc_nz; | |
1729 case Assembler::greater: return Assembler::rc_gz; | |
1730 case Assembler::greaterEqual: return Assembler::rc_gez; | |
1731 } | |
1732 ShouldNotReachHere(); | |
1733 return Assembler::rc_z; | |
1734 } | |
1735 | |
1736 // compares (32 bit) register with zero and branches. NOT FOR USE WITH 64-bit POINTERS | |
1737 void MacroAssembler::cmp_zero_and_br(Condition c, Register s1, Label& L, bool a, Predict p) { | |
1738 tst(s1); | |
1739 br (c, a, p, L); | |
1740 } | |
1741 | |
1742 // Compares a pointer register with zero and branches on null. | |
1743 // Does a test & branch on 32-bit systems and a register-branch on 64-bit. | |
1744 void MacroAssembler::br_null( Register s1, bool a, Predict p, Label& L ) { | |
1745 assert_not_delayed(); | |
1746 #ifdef _LP64 | |
1747 bpr( rc_z, a, p, s1, L ); | |
1748 #else | |
1749 tst(s1); | |
1750 br ( zero, a, p, L ); | |
1751 #endif | |
1752 } | |
1753 | |
1754 void MacroAssembler::br_notnull( Register s1, bool a, Predict p, Label& L ) { | |
1755 assert_not_delayed(); | |
1756 #ifdef _LP64 | |
1757 bpr( rc_nz, a, p, s1, L ); | |
1758 #else | |
1759 tst(s1); | |
1760 br ( notZero, a, p, L ); | |
1761 #endif | |
1762 } | |
1763 | |
1764 // Compare registers and branch with nop in delay slot or cbcond without delay slot. | |
1765 | |
1766 // Compare integer (32 bit) values (icc only). | |
1767 void MacroAssembler::cmp_and_br_short(Register s1, Register s2, Condition c, | |
1768 Predict p, Label& L) { | |
1769 assert_not_delayed(); | |
1770 if (use_cbcond(L)) { | |
1771 Assembler::cbcond(c, icc, s1, s2, L); | |
1772 } else { | |
1773 cmp(s1, s2); | |
1774 br(c, false, p, L); | |
1775 delayed()->nop(); | |
1776 } | |
1777 } | |
1778 | |
1779 // Compare integer (32 bit) values (icc only). | |
1780 void MacroAssembler::cmp_and_br_short(Register s1, int simm13a, Condition c, | |
1781 Predict p, Label& L) { | |
1782 assert_not_delayed(); | |
1783 if (is_simm(simm13a,5) && use_cbcond(L)) { | |
1784 Assembler::cbcond(c, icc, s1, simm13a, L); | |
1785 } else { | |
1786 cmp(s1, simm13a); | |
1787 br(c, false, p, L); | |
1788 delayed()->nop(); | |
1789 } | |
1790 } | |
1791 | |
1792 // Branch that tests xcc in LP64 and icc in !LP64 | |
1793 void MacroAssembler::cmp_and_brx_short(Register s1, Register s2, Condition c, | |
1794 Predict p, Label& L) { | |
1795 assert_not_delayed(); | |
1796 if (use_cbcond(L)) { | |
1797 Assembler::cbcond(c, ptr_cc, s1, s2, L); | |
1798 } else { | |
1799 cmp(s1, s2); | |
1800 brx(c, false, p, L); | |
1801 delayed()->nop(); | |
1802 } | |
1803 } | |
1804 | |
1805 // Branch that tests xcc in LP64 and icc in !LP64 | |
1806 void MacroAssembler::cmp_and_brx_short(Register s1, int simm13a, Condition c, | |
1807 Predict p, Label& L) { | |
1808 assert_not_delayed(); | |
1809 if (is_simm(simm13a,5) && use_cbcond(L)) { | |
1810 Assembler::cbcond(c, ptr_cc, s1, simm13a, L); | |
1811 } else { | |
1812 cmp(s1, simm13a); | |
1813 brx(c, false, p, L); | |
1814 delayed()->nop(); | |
1815 } | |
1816 } | |
1817 | |
1818 // Short branch version for compares a pointer with zero. | |
1819 | |
1820 void MacroAssembler::br_null_short(Register s1, Predict p, Label& L) { | |
1821 assert_not_delayed(); | |
1822 if (use_cbcond(L)) { | |
1823 Assembler::cbcond(zero, ptr_cc, s1, 0, L); | |
1824 return; | |
1825 } | |
1826 br_null(s1, false, p, L); | |
1827 delayed()->nop(); | |
1828 } | |
1829 | |
1830 void MacroAssembler::br_notnull_short(Register s1, Predict p, Label& L) { | |
1831 assert_not_delayed(); | |
1832 if (use_cbcond(L)) { | |
1833 Assembler::cbcond(notZero, ptr_cc, s1, 0, L); | |
1834 return; | |
1835 } | |
1836 br_notnull(s1, false, p, L); | |
1837 delayed()->nop(); | |
1838 } | |
1839 | |
1840 // Unconditional short branch | |
1841 void MacroAssembler::ba_short(Label& L) { | |
1842 if (use_cbcond(L)) { | |
1843 Assembler::cbcond(equal, icc, G0, G0, L); | |
1844 return; | |
1845 } | |
1846 br(always, false, pt, L); | |
1847 delayed()->nop(); | |
1848 } | |
1849 | |
1850 // instruction sequences factored across compiler & interpreter | |
1851 | |
1852 | |
1853 void MacroAssembler::lcmp( Register Ra_hi, Register Ra_low, | |
1854 Register Rb_hi, Register Rb_low, | |
1855 Register Rresult) { | |
1856 | |
1857 Label check_low_parts, done; | |
1858 | |
1859 cmp(Ra_hi, Rb_hi ); // compare hi parts | |
1860 br(equal, true, pt, check_low_parts); | |
1861 delayed()->cmp(Ra_low, Rb_low); // test low parts | |
1862 | |
1863 // And, with an unsigned comparison, it does not matter if the numbers | |
1864 // are negative or not. | |
1865 // E.g., -2 cmp -1: the low parts are 0xfffffffe and 0xffffffff. | |
1866 // The second one is bigger (unsignedly). | |
1867 | |
1868 // Other notes: The first move in each triplet can be unconditional | |
1869 // (and therefore probably prefetchable). | |
1870 // And the equals case for the high part does not need testing, | |
1871 // since that triplet is reached only after finding the high halves differ. | |
1872 | |
1873 if (VM_Version::v9_instructions_work()) { | |
1874 mov(-1, Rresult); | |
1875 ba(done); delayed()-> movcc(greater, false, icc, 1, Rresult); | |
1876 } else { | |
1877 br(less, true, pt, done); delayed()-> set(-1, Rresult); | |
1878 br(greater, true, pt, done); delayed()-> set( 1, Rresult); | |
1879 } | |
1880 | |
1881 bind( check_low_parts ); | |
1882 | |
1883 if (VM_Version::v9_instructions_work()) { | |
1884 mov( -1, Rresult); | |
1885 movcc(equal, false, icc, 0, Rresult); | |
1886 movcc(greaterUnsigned, false, icc, 1, Rresult); | |
1887 } else { | |
1888 set(-1, Rresult); | |
1889 br(equal, true, pt, done); delayed()->set( 0, Rresult); | |
1890 br(greaterUnsigned, true, pt, done); delayed()->set( 1, Rresult); | |
1891 } | |
1892 bind( done ); | |
1893 } | |
1894 | |
1895 void MacroAssembler::lneg( Register Rhi, Register Rlow ) { | |
1896 subcc( G0, Rlow, Rlow ); | |
1897 subc( G0, Rhi, Rhi ); | |
1898 } | |
1899 | |
1900 void MacroAssembler::lshl( Register Rin_high, Register Rin_low, | |
1901 Register Rcount, | |
1902 Register Rout_high, Register Rout_low, | |
1903 Register Rtemp ) { | |
1904 | |
1905 | |
1906 Register Ralt_count = Rtemp; | |
1907 Register Rxfer_bits = Rtemp; | |
1908 | |
1909 assert( Ralt_count != Rin_high | |
1910 && Ralt_count != Rin_low | |
1911 && Ralt_count != Rcount | |
1912 && Rxfer_bits != Rin_low | |
1913 && Rxfer_bits != Rin_high | |
1914 && Rxfer_bits != Rcount | |
1915 && Rxfer_bits != Rout_low | |
1916 && Rout_low != Rin_high, | |
1917 "register alias checks"); | |
1918 | |
1919 Label big_shift, done; | |
1920 | |
1921 // This code can be optimized to use the 64 bit shifts in V9. | |
1922 // Here we use the 32 bit shifts. | |
1923 | |
1924 and3( Rcount, 0x3f, Rcount); // take least significant 6 bits | |
1925 subcc(Rcount, 31, Ralt_count); | |
1926 br(greater, true, pn, big_shift); | |
1927 delayed()->dec(Ralt_count); | |
1928 | |
1929 // shift < 32 bits, Ralt_count = Rcount-31 | |
1930 | |
1931 // We get the transfer bits by shifting right by 32-count the low | |
1932 // register. This is done by shifting right by 31-count and then by one | |
1933 // more to take care of the special (rare) case where count is zero | |
1934 // (shifting by 32 would not work). | |
1935 | |
1936 neg(Ralt_count); | |
1937 | |
1938 // The order of the next two instructions is critical in the case where | |
1939 // Rin and Rout are the same and should not be reversed. | |
1940 | |
1941 srl(Rin_low, Ralt_count, Rxfer_bits); // shift right by 31-count | |
1942 if (Rcount != Rout_low) { | |
1943 sll(Rin_low, Rcount, Rout_low); // low half | |
1944 } | |
1945 sll(Rin_high, Rcount, Rout_high); | |
1946 if (Rcount == Rout_low) { | |
1947 sll(Rin_low, Rcount, Rout_low); // low half | |
1948 } | |
1949 srl(Rxfer_bits, 1, Rxfer_bits ); // shift right by one more | |
1950 ba(done); | |
1951 delayed()->or3(Rout_high, Rxfer_bits, Rout_high); // new hi value: or in shifted old hi part and xfer from low | |
1952 | |
1953 // shift >= 32 bits, Ralt_count = Rcount-32 | |
1954 bind(big_shift); | |
1955 sll(Rin_low, Ralt_count, Rout_high ); | |
1956 clr(Rout_low); | |
1957 | |
1958 bind(done); | |
1959 } | |
1960 | |
1961 | |
1962 void MacroAssembler::lshr( Register Rin_high, Register Rin_low, | |
1963 Register Rcount, | |
1964 Register Rout_high, Register Rout_low, | |
1965 Register Rtemp ) { | |
1966 | |
1967 Register Ralt_count = Rtemp; | |
1968 Register Rxfer_bits = Rtemp; | |
1969 | |
1970 assert( Ralt_count != Rin_high | |
1971 && Ralt_count != Rin_low | |
1972 && Ralt_count != Rcount | |
1973 && Rxfer_bits != Rin_low | |
1974 && Rxfer_bits != Rin_high | |
1975 && Rxfer_bits != Rcount | |
1976 && Rxfer_bits != Rout_high | |
1977 && Rout_high != Rin_low, | |
1978 "register alias checks"); | |
1979 | |
1980 Label big_shift, done; | |
1981 | |
1982 // This code can be optimized to use the 64 bit shifts in V9. | |
1983 // Here we use the 32 bit shifts. | |
1984 | |
1985 and3( Rcount, 0x3f, Rcount); // take least significant 6 bits | |
1986 subcc(Rcount, 31, Ralt_count); | |
1987 br(greater, true, pn, big_shift); | |
1988 delayed()->dec(Ralt_count); | |
1989 | |
1990 // shift < 32 bits, Ralt_count = Rcount-31 | |
1991 | |
1992 // We get the transfer bits by shifting left by 32-count the high | |
1993 // register. This is done by shifting left by 31-count and then by one | |
1994 // more to take care of the special (rare) case where count is zero | |
1995 // (shifting by 32 would not work). | |
1996 | |
1997 neg(Ralt_count); | |
1998 if (Rcount != Rout_low) { | |
1999 srl(Rin_low, Rcount, Rout_low); | |
2000 } | |
2001 | |
2002 // The order of the next two instructions is critical in the case where | |
2003 // Rin and Rout are the same and should not be reversed. | |
2004 | |
2005 sll(Rin_high, Ralt_count, Rxfer_bits); // shift left by 31-count | |
2006 sra(Rin_high, Rcount, Rout_high ); // high half | |
2007 sll(Rxfer_bits, 1, Rxfer_bits); // shift left by one more | |
2008 if (Rcount == Rout_low) { | |
2009 srl(Rin_low, Rcount, Rout_low); | |
2010 } | |
2011 ba(done); | |
2012 delayed()->or3(Rout_low, Rxfer_bits, Rout_low); // new low value: or shifted old low part and xfer from high | |
2013 | |
2014 // shift >= 32 bits, Ralt_count = Rcount-32 | |
2015 bind(big_shift); | |
2016 | |
2017 sra(Rin_high, Ralt_count, Rout_low); | |
2018 sra(Rin_high, 31, Rout_high); // sign into hi | |
2019 | |
2020 bind( done ); | |
2021 } | |
2022 | |
2023 | |
2024 | |
2025 void MacroAssembler::lushr( Register Rin_high, Register Rin_low, | |
2026 Register Rcount, | |
2027 Register Rout_high, Register Rout_low, | |
2028 Register Rtemp ) { | |
2029 | |
2030 Register Ralt_count = Rtemp; | |
2031 Register Rxfer_bits = Rtemp; | |
2032 | |
2033 assert( Ralt_count != Rin_high | |
2034 && Ralt_count != Rin_low | |
2035 && Ralt_count != Rcount | |
2036 && Rxfer_bits != Rin_low | |
2037 && Rxfer_bits != Rin_high | |
2038 && Rxfer_bits != Rcount | |
2039 && Rxfer_bits != Rout_high | |
2040 && Rout_high != Rin_low, | |
2041 "register alias checks"); | |
2042 | |
2043 Label big_shift, done; | |
2044 | |
2045 // This code can be optimized to use the 64 bit shifts in V9. | |
2046 // Here we use the 32 bit shifts. | |
2047 | |
2048 and3( Rcount, 0x3f, Rcount); // take least significant 6 bits | |
2049 subcc(Rcount, 31, Ralt_count); | |
2050 br(greater, true, pn, big_shift); | |
2051 delayed()->dec(Ralt_count); | |
2052 | |
2053 // shift < 32 bits, Ralt_count = Rcount-31 | |
2054 | |
2055 // We get the transfer bits by shifting left by 32-count the high | |
2056 // register. This is done by shifting left by 31-count and then by one | |
2057 // more to take care of the special (rare) case where count is zero | |
2058 // (shifting by 32 would not work). | |
2059 | |
2060 neg(Ralt_count); | |
2061 if (Rcount != Rout_low) { | |
2062 srl(Rin_low, Rcount, Rout_low); | |
2063 } | |
2064 | |
2065 // The order of the next two instructions is critical in the case where | |
2066 // Rin and Rout are the same and should not be reversed. | |
2067 | |
2068 sll(Rin_high, Ralt_count, Rxfer_bits); // shift left by 31-count | |
2069 srl(Rin_high, Rcount, Rout_high ); // high half | |
2070 sll(Rxfer_bits, 1, Rxfer_bits); // shift left by one more | |
2071 if (Rcount == Rout_low) { | |
2072 srl(Rin_low, Rcount, Rout_low); | |
2073 } | |
2074 ba(done); | |
2075 delayed()->or3(Rout_low, Rxfer_bits, Rout_low); // new low value: or shifted old low part and xfer from high | |
2076 | |
2077 // shift >= 32 bits, Ralt_count = Rcount-32 | |
2078 bind(big_shift); | |
2079 | |
2080 srl(Rin_high, Ralt_count, Rout_low); | |
2081 clr(Rout_high); | |
2082 | |
2083 bind( done ); | |
2084 } | |
2085 | |
2086 #ifdef _LP64 | |
2087 void MacroAssembler::lcmp( Register Ra, Register Rb, Register Rresult) { | |
2088 cmp(Ra, Rb); | |
2089 mov(-1, Rresult); | |
2090 movcc(equal, false, xcc, 0, Rresult); | |
2091 movcc(greater, false, xcc, 1, Rresult); | |
2092 } | |
2093 #endif | |
2094 | |
2095 | |
2096 void MacroAssembler::load_sized_value(Address src, Register dst, size_t size_in_bytes, bool is_signed) { | |
2097 switch (size_in_bytes) { | |
2098 case 8: ld_long(src, dst); break; | |
2099 case 4: ld( src, dst); break; | |
2100 case 2: is_signed ? ldsh(src, dst) : lduh(src, dst); break; | |
2101 case 1: is_signed ? ldsb(src, dst) : ldub(src, dst); break; | |
2102 default: ShouldNotReachHere(); | |
2103 } | |
2104 } | |
2105 | |
2106 void MacroAssembler::store_sized_value(Register src, Address dst, size_t size_in_bytes) { | |
2107 switch (size_in_bytes) { | |
2108 case 8: st_long(src, dst); break; | |
2109 case 4: st( src, dst); break; | |
2110 case 2: sth( src, dst); break; | |
2111 case 1: stb( src, dst); break; | |
2112 default: ShouldNotReachHere(); | |
2113 } | |
2114 } | |
2115 | |
2116 | |
2117 void MacroAssembler::float_cmp( bool is_float, int unordered_result, | |
2118 FloatRegister Fa, FloatRegister Fb, | |
2119 Register Rresult) { | |
2120 | |
2121 fcmp(is_float ? FloatRegisterImpl::S : FloatRegisterImpl::D, fcc0, Fa, Fb); | |
2122 | |
2123 Condition lt = unordered_result == -1 ? f_unorderedOrLess : f_less; | |
2124 Condition eq = f_equal; | |
2125 Condition gt = unordered_result == 1 ? f_unorderedOrGreater : f_greater; | |
2126 | |
2127 if (VM_Version::v9_instructions_work()) { | |
2128 | |
2129 mov(-1, Rresult); | |
2130 movcc(eq, true, fcc0, 0, Rresult); | |
2131 movcc(gt, true, fcc0, 1, Rresult); | |
2132 | |
2133 } else { | |
2134 Label done; | |
2135 | |
2136 set( -1, Rresult ); | |
2137 //fb(lt, true, pn, done); delayed()->set( -1, Rresult ); | |
2138 fb( eq, true, pn, done); delayed()->set( 0, Rresult ); | |
2139 fb( gt, true, pn, done); delayed()->set( 1, Rresult ); | |
2140 | |
2141 bind (done); | |
2142 } | |
2143 } | |
2144 | |
2145 | |
2146 void MacroAssembler::fneg( FloatRegisterImpl::Width w, FloatRegister s, FloatRegister d) | |
2147 { | |
2148 if (VM_Version::v9_instructions_work()) { | |
2149 Assembler::fneg(w, s, d); | |
2150 } else { | |
2151 if (w == FloatRegisterImpl::S) { | |
2152 Assembler::fneg(w, s, d); | |
2153 } else if (w == FloatRegisterImpl::D) { | |
2154 // number() does a sanity check on the alignment. | |
2155 assert(((s->encoding(FloatRegisterImpl::D) & 1) == 0) && | |
2156 ((d->encoding(FloatRegisterImpl::D) & 1) == 0), "float register alignment check"); | |
2157 | |
2158 Assembler::fneg(FloatRegisterImpl::S, s, d); | |
2159 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor()); | |
2160 } else { | |
2161 assert(w == FloatRegisterImpl::Q, "Invalid float register width"); | |
2162 | |
2163 // number() does a sanity check on the alignment. | |
2164 assert(((s->encoding(FloatRegisterImpl::D) & 3) == 0) && | |
2165 ((d->encoding(FloatRegisterImpl::D) & 3) == 0), "float register alignment check"); | |
2166 | |
2167 Assembler::fneg(FloatRegisterImpl::S, s, d); | |
2168 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor()); | |
2169 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor(), d->successor()->successor()); | |
2170 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor()->successor(), d->successor()->successor()->successor()); | |
2171 } | |
2172 } | |
2173 } | |
2174 | |
2175 void MacroAssembler::fmov( FloatRegisterImpl::Width w, FloatRegister s, FloatRegister d) | |
2176 { | |
2177 if (VM_Version::v9_instructions_work()) { | |
2178 Assembler::fmov(w, s, d); | |
2179 } else { | |
2180 if (w == FloatRegisterImpl::S) { | |
2181 Assembler::fmov(w, s, d); | |
2182 } else if (w == FloatRegisterImpl::D) { | |
2183 // number() does a sanity check on the alignment. | |
2184 assert(((s->encoding(FloatRegisterImpl::D) & 1) == 0) && | |
2185 ((d->encoding(FloatRegisterImpl::D) & 1) == 0), "float register alignment check"); | |
2186 | |
2187 Assembler::fmov(FloatRegisterImpl::S, s, d); | |
2188 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor()); | |
2189 } else { | |
2190 assert(w == FloatRegisterImpl::Q, "Invalid float register width"); | |
2191 | |
2192 // number() does a sanity check on the alignment. | |
2193 assert(((s->encoding(FloatRegisterImpl::D) & 3) == 0) && | |
2194 ((d->encoding(FloatRegisterImpl::D) & 3) == 0), "float register alignment check"); | |
2195 | |
2196 Assembler::fmov(FloatRegisterImpl::S, s, d); | |
2197 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor()); | |
2198 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor(), d->successor()->successor()); | |
2199 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor()->successor(), d->successor()->successor()->successor()); | |
2200 } | |
2201 } | |
2202 } | |
2203 | |
2204 void MacroAssembler::fabs( FloatRegisterImpl::Width w, FloatRegister s, FloatRegister d) | |
2205 { | |
2206 if (VM_Version::v9_instructions_work()) { | |
2207 Assembler::fabs(w, s, d); | |
2208 } else { | |
2209 if (w == FloatRegisterImpl::S) { | |
2210 Assembler::fabs(w, s, d); | |
2211 } else if (w == FloatRegisterImpl::D) { | |
2212 // number() does a sanity check on the alignment. | |
2213 assert(((s->encoding(FloatRegisterImpl::D) & 1) == 0) && | |
2214 ((d->encoding(FloatRegisterImpl::D) & 1) == 0), "float register alignment check"); | |
2215 | |
2216 Assembler::fabs(FloatRegisterImpl::S, s, d); | |
2217 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor()); | |
2218 } else { | |
2219 assert(w == FloatRegisterImpl::Q, "Invalid float register width"); | |
2220 | |
2221 // number() does a sanity check on the alignment. | |
2222 assert(((s->encoding(FloatRegisterImpl::D) & 3) == 0) && | |
2223 ((d->encoding(FloatRegisterImpl::D) & 3) == 0), "float register alignment check"); | |
2224 | |
2225 Assembler::fabs(FloatRegisterImpl::S, s, d); | |
2226 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor()); | |
2227 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor(), d->successor()->successor()); | |
2228 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor()->successor(), d->successor()->successor()->successor()); | |
2229 } | |
2230 } | |
2231 } | |
2232 | |
2233 void MacroAssembler::save_all_globals_into_locals() { | |
2234 mov(G1,L1); | |
2235 mov(G2,L2); | |
2236 mov(G3,L3); | |
2237 mov(G4,L4); | |
2238 mov(G5,L5); | |
2239 mov(G6,L6); | |
2240 mov(G7,L7); | |
2241 } | |
2242 | |
2243 void MacroAssembler::restore_globals_from_locals() { | |
2244 mov(L1,G1); | |
2245 mov(L2,G2); | |
2246 mov(L3,G3); | |
2247 mov(L4,G4); | |
2248 mov(L5,G5); | |
2249 mov(L6,G6); | |
2250 mov(L7,G7); | |
2251 } | |
2252 | |
2253 // Use for 64 bit operation. | |
2254 void MacroAssembler::casx_under_lock(Register top_ptr_reg, Register top_reg, Register ptr_reg, address lock_addr, bool use_call_vm) | |
2255 { | |
2256 // store ptr_reg as the new top value | |
2257 #ifdef _LP64 | |
2258 casx(top_ptr_reg, top_reg, ptr_reg); | |
2259 #else | |
2260 cas_under_lock(top_ptr_reg, top_reg, ptr_reg, lock_addr, use_call_vm); | |
2261 #endif // _LP64 | |
2262 } | |
2263 | |
2264 // [RGV] This routine does not handle 64 bit operations. | |
2265 // use casx_under_lock() or casx directly!!! | |
2266 void MacroAssembler::cas_under_lock(Register top_ptr_reg, Register top_reg, Register ptr_reg, address lock_addr, bool use_call_vm) | |
2267 { | |
2268 // store ptr_reg as the new top value | |
2269 if (VM_Version::v9_instructions_work()) { | |
2270 cas(top_ptr_reg, top_reg, ptr_reg); | |
2271 } else { | |
2272 | |
2273 // If the register is not an out nor global, it is not visible | |
2274 // after the save. Allocate a register for it, save its | |
2275 // value in the register save area (the save may not flush | |
2276 // registers to the save area). | |
2277 | |
2278 Register top_ptr_reg_after_save; | |
2279 Register top_reg_after_save; | |
2280 Register ptr_reg_after_save; | |
2281 | |
2282 if (top_ptr_reg->is_out() || top_ptr_reg->is_global()) { | |
2283 top_ptr_reg_after_save = top_ptr_reg->after_save(); | |
2284 } else { | |
2285 Address reg_save_addr = top_ptr_reg->address_in_saved_window(); | |
2286 top_ptr_reg_after_save = L0; | |
2287 st(top_ptr_reg, reg_save_addr); | |
2288 } | |
2289 | |
2290 if (top_reg->is_out() || top_reg->is_global()) { | |
2291 top_reg_after_save = top_reg->after_save(); | |
2292 } else { | |
2293 Address reg_save_addr = top_reg->address_in_saved_window(); | |
2294 top_reg_after_save = L1; | |
2295 st(top_reg, reg_save_addr); | |
2296 } | |
2297 | |
2298 if (ptr_reg->is_out() || ptr_reg->is_global()) { | |
2299 ptr_reg_after_save = ptr_reg->after_save(); | |
2300 } else { | |
2301 Address reg_save_addr = ptr_reg->address_in_saved_window(); | |
2302 ptr_reg_after_save = L2; | |
2303 st(ptr_reg, reg_save_addr); | |
2304 } | |
2305 | |
2306 const Register& lock_reg = L3; | |
2307 const Register& lock_ptr_reg = L4; | |
2308 const Register& value_reg = L5; | |
2309 const Register& yield_reg = L6; | |
2310 const Register& yieldall_reg = L7; | |
2311 | |
2312 save_frame(); | |
2313 | |
2314 if (top_ptr_reg_after_save == L0) { | |
2315 ld(top_ptr_reg->address_in_saved_window().after_save(), top_ptr_reg_after_save); | |
2316 } | |
2317 | |
2318 if (top_reg_after_save == L1) { | |
2319 ld(top_reg->address_in_saved_window().after_save(), top_reg_after_save); | |
2320 } | |
2321 | |
2322 if (ptr_reg_after_save == L2) { | |
2323 ld(ptr_reg->address_in_saved_window().after_save(), ptr_reg_after_save); | |
2324 } | |
2325 | |
2326 Label(retry_get_lock); | |
2327 Label(not_same); | |
2328 Label(dont_yield); | |
2329 | |
2330 assert(lock_addr, "lock_address should be non null for v8"); | |
2331 set((intptr_t)lock_addr, lock_ptr_reg); | |
2332 // Initialize yield counter | |
2333 mov(G0,yield_reg); | |
2334 mov(G0, yieldall_reg); | |
2335 set(StubRoutines::Sparc::locked, lock_reg); | |
2336 | |
2337 bind(retry_get_lock); | |
2338 cmp_and_br_short(yield_reg, V8AtomicOperationUnderLockSpinCount, Assembler::less, Assembler::pt, dont_yield); | |
2339 | |
2340 if(use_call_vm) { | |
2341 Untested("Need to verify global reg consistancy"); | |
2342 call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::yield_all), yieldall_reg); | |
2343 } else { | |
2344 // Save the regs and make space for a C call | |
2345 save(SP, -96, SP); | |
2346 save_all_globals_into_locals(); | |
2347 call(CAST_FROM_FN_PTR(address,os::yield_all)); | |
2348 delayed()->mov(yieldall_reg, O0); | |
2349 restore_globals_from_locals(); | |
2350 restore(); | |
2351 } | |
2352 | |
2353 // reset the counter | |
2354 mov(G0,yield_reg); | |
2355 add(yieldall_reg, 1, yieldall_reg); | |
2356 | |
2357 bind(dont_yield); | |
2358 // try to get lock | |
2359 Assembler::swap(lock_ptr_reg, 0, lock_reg); | |
2360 | |
2361 // did we get the lock? | |
2362 cmp(lock_reg, StubRoutines::Sparc::unlocked); | |
2363 br(Assembler::notEqual, true, Assembler::pn, retry_get_lock); | |
2364 delayed()->add(yield_reg,1,yield_reg); | |
2365 | |
2366 // yes, got lock. do we have the same top? | |
2367 ld(top_ptr_reg_after_save, 0, value_reg); | |
2368 cmp_and_br_short(value_reg, top_reg_after_save, Assembler::notEqual, Assembler::pn, not_same); | |
2369 | |
2370 // yes, same top. | |
2371 st(ptr_reg_after_save, top_ptr_reg_after_save, 0); | |
2372 membar(Assembler::StoreStore); | |
2373 | |
2374 bind(not_same); | |
2375 mov(value_reg, ptr_reg_after_save); | |
2376 st(lock_reg, lock_ptr_reg, 0); // unlock | |
2377 | |
2378 restore(); | |
2379 } | |
2380 } | |
2381 | |
2382 RegisterOrConstant MacroAssembler::delayed_value_impl(intptr_t* delayed_value_addr, | |
2383 Register tmp, | |
2384 int offset) { | |
2385 intptr_t value = *delayed_value_addr; | |
2386 if (value != 0) | |
2387 return RegisterOrConstant(value + offset); | |
2388 | |
2389 // load indirectly to solve generation ordering problem | |
2390 AddressLiteral a(delayed_value_addr); | |
2391 load_ptr_contents(a, tmp); | |
2392 | |
2393 #ifdef ASSERT | |
2394 tst(tmp); | |
2395 breakpoint_trap(zero, xcc); | |
2396 #endif | |
2397 | |
2398 if (offset != 0) | |
2399 add(tmp, offset, tmp); | |
2400 | |
2401 return RegisterOrConstant(tmp); | |
2402 } | |
2403 | |
2404 | |
2405 RegisterOrConstant MacroAssembler::regcon_andn_ptr(RegisterOrConstant s1, RegisterOrConstant s2, RegisterOrConstant d, Register temp) { | |
2406 assert(d.register_or_noreg() != G0, "lost side effect"); | |
2407 if ((s2.is_constant() && s2.as_constant() == 0) || | |
2408 (s2.is_register() && s2.as_register() == G0)) { | |
2409 // Do nothing, just move value. | |
2410 if (s1.is_register()) { | |
2411 if (d.is_constant()) d = temp; | |
2412 mov(s1.as_register(), d.as_register()); | |
2413 return d; | |
2414 } else { | |
2415 return s1; | |
2416 } | |
2417 } | |
2418 | |
2419 if (s1.is_register()) { | |
2420 assert_different_registers(s1.as_register(), temp); | |
2421 if (d.is_constant()) d = temp; | |
2422 andn(s1.as_register(), ensure_simm13_or_reg(s2, temp), d.as_register()); | |
2423 return d; | |
2424 } else { | |
2425 if (s2.is_register()) { | |
2426 assert_different_registers(s2.as_register(), temp); | |
2427 if (d.is_constant()) d = temp; | |
2428 set(s1.as_constant(), temp); | |
2429 andn(temp, s2.as_register(), d.as_register()); | |
2430 return d; | |
2431 } else { | |
2432 intptr_t res = s1.as_constant() & ~s2.as_constant(); | |
2433 return res; | |
2434 } | |
2435 } | |
2436 } | |
2437 | |
2438 RegisterOrConstant MacroAssembler::regcon_inc_ptr(RegisterOrConstant s1, RegisterOrConstant s2, RegisterOrConstant d, Register temp) { | |
2439 assert(d.register_or_noreg() != G0, "lost side effect"); | |
2440 if ((s2.is_constant() && s2.as_constant() == 0) || | |
2441 (s2.is_register() && s2.as_register() == G0)) { | |
2442 // Do nothing, just move value. | |
2443 if (s1.is_register()) { | |
2444 if (d.is_constant()) d = temp; | |
2445 mov(s1.as_register(), d.as_register()); | |
2446 return d; | |
2447 } else { | |
2448 return s1; | |
2449 } | |
2450 } | |
2451 | |
2452 if (s1.is_register()) { | |
2453 assert_different_registers(s1.as_register(), temp); | |
2454 if (d.is_constant()) d = temp; | |
2455 add(s1.as_register(), ensure_simm13_or_reg(s2, temp), d.as_register()); | |
2456 return d; | |
2457 } else { | |
2458 if (s2.is_register()) { | |
2459 assert_different_registers(s2.as_register(), temp); | |
2460 if (d.is_constant()) d = temp; | |
2461 add(s2.as_register(), ensure_simm13_or_reg(s1, temp), d.as_register()); | |
2462 return d; | |
2463 } else { | |
2464 intptr_t res = s1.as_constant() + s2.as_constant(); | |
2465 return res; | |
2466 } | |
2467 } | |
2468 } | |
2469 | |
2470 RegisterOrConstant MacroAssembler::regcon_sll_ptr(RegisterOrConstant s1, RegisterOrConstant s2, RegisterOrConstant d, Register temp) { | |
2471 assert(d.register_or_noreg() != G0, "lost side effect"); | |
2472 if (!is_simm13(s2.constant_or_zero())) | |
2473 s2 = (s2.as_constant() & 0xFF); | |
2474 if ((s2.is_constant() && s2.as_constant() == 0) || | |
2475 (s2.is_register() && s2.as_register() == G0)) { | |
2476 // Do nothing, just move value. | |
2477 if (s1.is_register()) { | |
2478 if (d.is_constant()) d = temp; | |
2479 mov(s1.as_register(), d.as_register()); | |
2480 return d; | |
2481 } else { | |
2482 return s1; | |
2483 } | |
2484 } | |
2485 | |
2486 if (s1.is_register()) { | |
2487 assert_different_registers(s1.as_register(), temp); | |
2488 if (d.is_constant()) d = temp; | |
2489 sll_ptr(s1.as_register(), ensure_simm13_or_reg(s2, temp), d.as_register()); | |
2490 return d; | |
2491 } else { | |
2492 if (s2.is_register()) { | |
2493 assert_different_registers(s2.as_register(), temp); | |
2494 if (d.is_constant()) d = temp; | |
2495 set(s1.as_constant(), temp); | |
2496 sll_ptr(temp, s2.as_register(), d.as_register()); | |
2497 return d; | |
2498 } else { | |
2499 intptr_t res = s1.as_constant() << s2.as_constant(); | |
2500 return res; | |
2501 } | |
2502 } | |
2503 } | |
2504 | |
2505 | |
2506 // Look up the method for a megamorphic invokeinterface call. | |
2507 // The target method is determined by <intf_klass, itable_index>. | |
2508 // The receiver klass is in recv_klass. | |
2509 // On success, the result will be in method_result, and execution falls through. | |
2510 // On failure, execution transfers to the given label. | |
2511 void MacroAssembler::lookup_interface_method(Register recv_klass, | |
2512 Register intf_klass, | |
2513 RegisterOrConstant itable_index, | |
2514 Register method_result, | |
2515 Register scan_temp, | |
2516 Register sethi_temp, | |
2517 Label& L_no_such_interface) { | |
2518 assert_different_registers(recv_klass, intf_klass, method_result, scan_temp); | |
2519 assert(itable_index.is_constant() || itable_index.as_register() == method_result, | |
2520 "caller must use same register for non-constant itable index as for method"); | |
2521 | |
2522 Label L_no_such_interface_restore; | |
2523 bool did_save = false; | |
2524 if (scan_temp == noreg || sethi_temp == noreg) { | |
2525 Register recv_2 = recv_klass->is_global() ? recv_klass : L0; | |
2526 Register intf_2 = intf_klass->is_global() ? intf_klass : L1; | |
2527 assert(method_result->is_global(), "must be able to return value"); | |
2528 scan_temp = L2; | |
2529 sethi_temp = L3; | |
2530 save_frame_and_mov(0, recv_klass, recv_2, intf_klass, intf_2); | |
2531 recv_klass = recv_2; | |
2532 intf_klass = intf_2; | |
2533 did_save = true; | |
2534 } | |
2535 | |
2536 // Compute start of first itableOffsetEntry (which is at the end of the vtable) | |
2537 int vtable_base = InstanceKlass::vtable_start_offset() * wordSize; | |
2538 int scan_step = itableOffsetEntry::size() * wordSize; | |
2539 int vte_size = vtableEntry::size() * wordSize; | |
2540 | |
2541 lduw(recv_klass, InstanceKlass::vtable_length_offset() * wordSize, scan_temp); | |
2542 // %%% We should store the aligned, prescaled offset in the klassoop. | |
2543 // Then the next several instructions would fold away. | |
2544 | |
2545 int round_to_unit = ((HeapWordsPerLong > 1) ? BytesPerLong : 0); | |
2546 int itb_offset = vtable_base; | |
2547 if (round_to_unit != 0) { | |
2548 // hoist first instruction of round_to(scan_temp, BytesPerLong): | |
2549 itb_offset += round_to_unit - wordSize; | |
2550 } | |
2551 int itb_scale = exact_log2(vtableEntry::size() * wordSize); | |
2552 sll(scan_temp, itb_scale, scan_temp); | |
2553 add(scan_temp, itb_offset, scan_temp); | |
2554 if (round_to_unit != 0) { | |
2555 // Round up to align_object_offset boundary | |
2556 // see code for InstanceKlass::start_of_itable! | |
2557 // Was: round_to(scan_temp, BytesPerLong); | |
2558 // Hoisted: add(scan_temp, BytesPerLong-1, scan_temp); | |
2559 and3(scan_temp, -round_to_unit, scan_temp); | |
2560 } | |
2561 add(recv_klass, scan_temp, scan_temp); | |
2562 | |
2563 // Adjust recv_klass by scaled itable_index, so we can free itable_index. | |
2564 RegisterOrConstant itable_offset = itable_index; | |
2565 itable_offset = regcon_sll_ptr(itable_index, exact_log2(itableMethodEntry::size() * wordSize), itable_offset); | |
2566 itable_offset = regcon_inc_ptr(itable_offset, itableMethodEntry::method_offset_in_bytes(), itable_offset); | |
2567 add(recv_klass, ensure_simm13_or_reg(itable_offset, sethi_temp), recv_klass); | |
2568 | |
2569 // for (scan = klass->itable(); scan->interface() != NULL; scan += scan_step) { | |
2570 // if (scan->interface() == intf) { | |
2571 // result = (klass + scan->offset() + itable_index); | |
2572 // } | |
2573 // } | |
2574 Label L_search, L_found_method; | |
2575 | |
2576 for (int peel = 1; peel >= 0; peel--) { | |
2577 // %%%% Could load both offset and interface in one ldx, if they were | |
2578 // in the opposite order. This would save a load. | |
2579 ld_ptr(scan_temp, itableOffsetEntry::interface_offset_in_bytes(), method_result); | |
2580 | |
2581 // Check that this entry is non-null. A null entry means that | |
2582 // the receiver class doesn't implement the interface, and wasn't the | |
2583 // same as when the caller was compiled. | |
2584 bpr(Assembler::rc_z, false, Assembler::pn, method_result, did_save ? L_no_such_interface_restore : L_no_such_interface); | |
2585 delayed()->cmp(method_result, intf_klass); | |
2586 | |
2587 if (peel) { | |
2588 brx(Assembler::equal, false, Assembler::pt, L_found_method); | |
2589 } else { | |
2590 brx(Assembler::notEqual, false, Assembler::pn, L_search); | |
2591 // (invert the test to fall through to found_method...) | |
2592 } | |
2593 delayed()->add(scan_temp, scan_step, scan_temp); | |
2594 | |
2595 if (!peel) break; | |
2596 | |
2597 bind(L_search); | |
2598 } | |
2599 | |
2600 bind(L_found_method); | |
2601 | |
2602 // Got a hit. | |
2603 int ito_offset = itableOffsetEntry::offset_offset_in_bytes(); | |
2604 // scan_temp[-scan_step] points to the vtable offset we need | |
2605 ito_offset -= scan_step; | |
2606 lduw(scan_temp, ito_offset, scan_temp); | |
2607 ld_ptr(recv_klass, scan_temp, method_result); | |
2608 | |
2609 if (did_save) { | |
2610 Label L_done; | |
2611 ba(L_done); | |
2612 delayed()->restore(); | |
2613 | |
2614 bind(L_no_such_interface_restore); | |
2615 ba(L_no_such_interface); | |
2616 delayed()->restore(); | |
2617 | |
2618 bind(L_done); | |
2619 } | |
2620 } | |
2621 | |
2622 | |
2623 // virtual method calling | |
2624 void MacroAssembler::lookup_virtual_method(Register recv_klass, | |
2625 RegisterOrConstant vtable_index, | |
2626 Register method_result) { | |
2627 assert_different_registers(recv_klass, method_result, vtable_index.register_or_noreg()); | |
2628 Register sethi_temp = method_result; | |
2629 const int base = (InstanceKlass::vtable_start_offset() * wordSize + | |
2630 // method pointer offset within the vtable entry: | |
2631 vtableEntry::method_offset_in_bytes()); | |
2632 RegisterOrConstant vtable_offset = vtable_index; | |
2633 // Each of the following three lines potentially generates an instruction. | |
2634 // But the total number of address formation instructions will always be | |
2635 // at most two, and will often be zero. In any case, it will be optimal. | |
2636 // If vtable_index is a register, we will have (sll_ptr N,x; inc_ptr B,x; ld_ptr k,x). | |
2637 // If vtable_index is a constant, we will have at most (set B+X<<N,t; ld_ptr k,t). | |
2638 vtable_offset = regcon_sll_ptr(vtable_index, exact_log2(vtableEntry::size() * wordSize), vtable_offset); | |
2639 vtable_offset = regcon_inc_ptr(vtable_offset, base, vtable_offset, sethi_temp); | |
2640 Address vtable_entry_addr(recv_klass, ensure_simm13_or_reg(vtable_offset, sethi_temp)); | |
2641 ld_ptr(vtable_entry_addr, method_result); | |
2642 } | |
2643 | |
2644 | |
2645 void MacroAssembler::check_klass_subtype(Register sub_klass, | |
2646 Register super_klass, | |
2647 Register temp_reg, | |
2648 Register temp2_reg, | |
2649 Label& L_success) { | |
2650 Register sub_2 = sub_klass; | |
2651 Register sup_2 = super_klass; | |
2652 if (!sub_2->is_global()) sub_2 = L0; | |
2653 if (!sup_2->is_global()) sup_2 = L1; | |
2654 bool did_save = false; | |
2655 if (temp_reg == noreg || temp2_reg == noreg) { | |
2656 temp_reg = L2; | |
2657 temp2_reg = L3; | |
2658 save_frame_and_mov(0, sub_klass, sub_2, super_klass, sup_2); | |
2659 sub_klass = sub_2; | |
2660 super_klass = sup_2; | |
2661 did_save = true; | |
2662 } | |
2663 Label L_failure, L_pop_to_failure, L_pop_to_success; | |
2664 check_klass_subtype_fast_path(sub_klass, super_klass, | |
2665 temp_reg, temp2_reg, | |
2666 (did_save ? &L_pop_to_success : &L_success), | |
2667 (did_save ? &L_pop_to_failure : &L_failure), NULL); | |
2668 | |
2669 if (!did_save) | |
2670 save_frame_and_mov(0, sub_klass, sub_2, super_klass, sup_2); | |
2671 check_klass_subtype_slow_path(sub_2, sup_2, | |
2672 L2, L3, L4, L5, | |
2673 NULL, &L_pop_to_failure); | |
2674 | |
2675 // on success: | |
2676 bind(L_pop_to_success); | |
2677 restore(); | |
2678 ba_short(L_success); | |
2679 | |
2680 // on failure: | |
2681 bind(L_pop_to_failure); | |
2682 restore(); | |
2683 bind(L_failure); | |
2684 } | |
2685 | |
2686 | |
2687 void MacroAssembler::check_klass_subtype_fast_path(Register sub_klass, | |
2688 Register super_klass, | |
2689 Register temp_reg, | |
2690 Register temp2_reg, | |
2691 Label* L_success, | |
2692 Label* L_failure, | |
2693 Label* L_slow_path, | |
2694 RegisterOrConstant super_check_offset) { | |
2695 int sc_offset = in_bytes(Klass::secondary_super_cache_offset()); | |
2696 int sco_offset = in_bytes(Klass::super_check_offset_offset()); | |
2697 | |
2698 bool must_load_sco = (super_check_offset.constant_or_zero() == -1); | |
2699 bool need_slow_path = (must_load_sco || | |
2700 super_check_offset.constant_or_zero() == sco_offset); | |
2701 | |
2702 assert_different_registers(sub_klass, super_klass, temp_reg); | |
2703 if (super_check_offset.is_register()) { | |
2704 assert_different_registers(sub_klass, super_klass, temp_reg, | |
2705 super_check_offset.as_register()); | |
2706 } else if (must_load_sco) { | |
2707 assert(temp2_reg != noreg, "supply either a temp or a register offset"); | |
2708 } | |
2709 | |
2710 Label L_fallthrough; | |
2711 int label_nulls = 0; | |
2712 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; } | |
2713 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; } | |
2714 if (L_slow_path == NULL) { L_slow_path = &L_fallthrough; label_nulls++; } | |
2715 assert(label_nulls <= 1 || | |
2716 (L_slow_path == &L_fallthrough && label_nulls <= 2 && !need_slow_path), | |
2717 "at most one NULL in the batch, usually"); | |
2718 | |
2719 // If the pointers are equal, we are done (e.g., String[] elements). | |
2720 // This self-check enables sharing of secondary supertype arrays among | |
2721 // non-primary types such as array-of-interface. Otherwise, each such | |
2722 // type would need its own customized SSA. | |
2723 // We move this check to the front of the fast path because many | |
2724 // type checks are in fact trivially successful in this manner, | |
2725 // so we get a nicely predicted branch right at the start of the check. | |
2726 cmp(super_klass, sub_klass); | |
2727 brx(Assembler::equal, false, Assembler::pn, *L_success); | |
2728 delayed()->nop(); | |
2729 | |
2730 // Check the supertype display: | |
2731 if (must_load_sco) { | |
2732 // The super check offset is always positive... | |
2733 lduw(super_klass, sco_offset, temp2_reg); | |
2734 super_check_offset = RegisterOrConstant(temp2_reg); | |
2735 // super_check_offset is register. | |
2736 assert_different_registers(sub_klass, super_klass, temp_reg, super_check_offset.as_register()); | |
2737 } | |
2738 ld_ptr(sub_klass, super_check_offset, temp_reg); | |
2739 cmp(super_klass, temp_reg); | |
2740 | |
2741 // This check has worked decisively for primary supers. | |
2742 // Secondary supers are sought in the super_cache ('super_cache_addr'). | |
2743 // (Secondary supers are interfaces and very deeply nested subtypes.) | |
2744 // This works in the same check above because of a tricky aliasing | |
2745 // between the super_cache and the primary super display elements. | |
2746 // (The 'super_check_addr' can address either, as the case requires.) | |
2747 // Note that the cache is updated below if it does not help us find | |
2748 // what we need immediately. | |
2749 // So if it was a primary super, we can just fail immediately. | |
2750 // Otherwise, it's the slow path for us (no success at this point). | |
2751 | |
2752 // Hacked ba(), which may only be used just before L_fallthrough. | |
2753 #define FINAL_JUMP(label) \ | |
2754 if (&(label) != &L_fallthrough) { \ | |
2755 ba(label); delayed()->nop(); \ | |
2756 } | |
2757 | |
2758 if (super_check_offset.is_register()) { | |
2759 brx(Assembler::equal, false, Assembler::pn, *L_success); | |
2760 delayed()->cmp(super_check_offset.as_register(), sc_offset); | |
2761 | |
2762 if (L_failure == &L_fallthrough) { | |
2763 brx(Assembler::equal, false, Assembler::pt, *L_slow_path); | |
2764 delayed()->nop(); | |
2765 } else { | |
2766 brx(Assembler::notEqual, false, Assembler::pn, *L_failure); | |
2767 delayed()->nop(); | |
2768 FINAL_JUMP(*L_slow_path); | |
2769 } | |
2770 } else if (super_check_offset.as_constant() == sc_offset) { | |
2771 // Need a slow path; fast failure is impossible. | |
2772 if (L_slow_path == &L_fallthrough) { | |
2773 brx(Assembler::equal, false, Assembler::pt, *L_success); | |
2774 delayed()->nop(); | |
2775 } else { | |
2776 brx(Assembler::notEqual, false, Assembler::pn, *L_slow_path); | |
2777 delayed()->nop(); | |
2778 FINAL_JUMP(*L_success); | |
2779 } | |
2780 } else { | |
2781 // No slow path; it's a fast decision. | |
2782 if (L_failure == &L_fallthrough) { | |
2783 brx(Assembler::equal, false, Assembler::pt, *L_success); | |
2784 delayed()->nop(); | |
2785 } else { | |
2786 brx(Assembler::notEqual, false, Assembler::pn, *L_failure); | |
2787 delayed()->nop(); | |
2788 FINAL_JUMP(*L_success); | |
2789 } | |
2790 } | |
2791 | |
2792 bind(L_fallthrough); | |
2793 | |
2794 #undef FINAL_JUMP | |
2795 } | |
2796 | |
2797 | |
2798 void MacroAssembler::check_klass_subtype_slow_path(Register sub_klass, | |
2799 Register super_klass, | |
2800 Register count_temp, | |
2801 Register scan_temp, | |
2802 Register scratch_reg, | |
2803 Register coop_reg, | |
2804 Label* L_success, | |
2805 Label* L_failure) { | |
2806 assert_different_registers(sub_klass, super_klass, | |
2807 count_temp, scan_temp, scratch_reg, coop_reg); | |
2808 | |
2809 Label L_fallthrough, L_loop; | |
2810 int label_nulls = 0; | |
2811 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; } | |
2812 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; } | |
2813 assert(label_nulls <= 1, "at most one NULL in the batch"); | |
2814 | |
2815 // a couple of useful fields in sub_klass: | |
2816 int ss_offset = in_bytes(Klass::secondary_supers_offset()); | |
2817 int sc_offset = in_bytes(Klass::secondary_super_cache_offset()); | |
2818 | |
2819 // Do a linear scan of the secondary super-klass chain. | |
2820 // This code is rarely used, so simplicity is a virtue here. | |
2821 | |
2822 #ifndef PRODUCT | |
2823 int* pst_counter = &SharedRuntime::_partial_subtype_ctr; | |
2824 inc_counter((address) pst_counter, count_temp, scan_temp); | |
2825 #endif | |
2826 | |
2827 // We will consult the secondary-super array. | |
2828 ld_ptr(sub_klass, ss_offset, scan_temp); | |
2829 | |
2830 Register search_key = super_klass; | |
2831 | |
2832 // Load the array length. (Positive movl does right thing on LP64.) | |
2833 lduw(scan_temp, Array<Klass*>::length_offset_in_bytes(), count_temp); | |
2834 | |
2835 // Check for empty secondary super list | |
2836 tst(count_temp); | |
2837 | |
2838 // In the array of super classes elements are pointer sized. | |
2839 int element_size = wordSize; | |
2840 | |
2841 // Top of search loop | |
2842 bind(L_loop); | |
2843 br(Assembler::equal, false, Assembler::pn, *L_failure); | |
2844 delayed()->add(scan_temp, element_size, scan_temp); | |
2845 | |
2846 // Skip the array header in all array accesses. | |
2847 int elem_offset = Array<Klass*>::base_offset_in_bytes(); | |
2848 elem_offset -= element_size; // the scan pointer was pre-incremented also | |
2849 | |
2850 // Load next super to check | |
2851 ld_ptr( scan_temp, elem_offset, scratch_reg ); | |
2852 | |
2853 // Look for Rsuper_klass on Rsub_klass's secondary super-class-overflow list | |
2854 cmp(scratch_reg, search_key); | |
2855 | |
2856 // A miss means we are NOT a subtype and need to keep looping | |
2857 brx(Assembler::notEqual, false, Assembler::pn, L_loop); | |
2858 delayed()->deccc(count_temp); // decrement trip counter in delay slot | |
2859 | |
2860 // Success. Cache the super we found and proceed in triumph. | |
2861 st_ptr(super_klass, sub_klass, sc_offset); | |
2862 | |
2863 if (L_success != &L_fallthrough) { | |
2864 ba(*L_success); | |
2865 delayed()->nop(); | |
2866 } | |
2867 | |
2868 bind(L_fallthrough); | |
2869 } | |
2870 | |
2871 | |
2872 RegisterOrConstant MacroAssembler::argument_offset(RegisterOrConstant arg_slot, | |
2873 Register temp_reg, | |
2874 int extra_slot_offset) { | |
2875 // cf. TemplateTable::prepare_invoke(), if (load_receiver). | |
2876 int stackElementSize = Interpreter::stackElementSize; | |
2877 int offset = extra_slot_offset * stackElementSize; | |
2878 if (arg_slot.is_constant()) { | |
2879 offset += arg_slot.as_constant() * stackElementSize; | |
2880 return offset; | |
2881 } else { | |
2882 assert(temp_reg != noreg, "must specify"); | |
2883 sll_ptr(arg_slot.as_register(), exact_log2(stackElementSize), temp_reg); | |
2884 if (offset != 0) | |
2885 add(temp_reg, offset, temp_reg); | |
2886 return temp_reg; | |
2887 } | |
2888 } | |
2889 | |
2890 | |
2891 Address MacroAssembler::argument_address(RegisterOrConstant arg_slot, | |
2892 Register temp_reg, | |
2893 int extra_slot_offset) { | |
2894 return Address(Gargs, argument_offset(arg_slot, temp_reg, extra_slot_offset)); | |
2895 } | |
2896 | |
2897 | |
2898 void MacroAssembler::biased_locking_enter(Register obj_reg, Register mark_reg, | |
2899 Register temp_reg, | |
2900 Label& done, Label* slow_case, | |
2901 BiasedLockingCounters* counters) { | |
2902 assert(UseBiasedLocking, "why call this otherwise?"); | |
2903 | |
2904 if (PrintBiasedLockingStatistics) { | |
2905 assert_different_registers(obj_reg, mark_reg, temp_reg, O7); | |
2906 if (counters == NULL) | |
2907 counters = BiasedLocking::counters(); | |
2908 } | |
2909 | |
2910 Label cas_label; | |
2911 | |
2912 // Biased locking | |
2913 // See whether the lock is currently biased toward our thread and | |
2914 // whether the epoch is still valid | |
2915 // Note that the runtime guarantees sufficient alignment of JavaThread | |
2916 // pointers to allow age to be placed into low bits | |
2917 assert(markOopDesc::age_shift == markOopDesc::lock_bits + markOopDesc::biased_lock_bits, "biased locking makes assumptions about bit layout"); | |
2918 and3(mark_reg, markOopDesc::biased_lock_mask_in_place, temp_reg); | |
2919 cmp_and_brx_short(temp_reg, markOopDesc::biased_lock_pattern, Assembler::notEqual, Assembler::pn, cas_label); | |
2920 | |
2921 load_klass(obj_reg, temp_reg); | |
2922 ld_ptr(Address(temp_reg, Klass::prototype_header_offset()), temp_reg); | |
2923 or3(G2_thread, temp_reg, temp_reg); | |
2924 xor3(mark_reg, temp_reg, temp_reg); | |
2925 andcc(temp_reg, ~((int) markOopDesc::age_mask_in_place), temp_reg); | |
2926 if (counters != NULL) { | |
2927 cond_inc(Assembler::equal, (address) counters->biased_lock_entry_count_addr(), mark_reg, temp_reg); | |
2928 // Reload mark_reg as we may need it later | |
2929 ld_ptr(Address(obj_reg, oopDesc::mark_offset_in_bytes()), mark_reg); | |
2930 } | |
2931 brx(Assembler::equal, true, Assembler::pt, done); | |
2932 delayed()->nop(); | |
2933 | |
2934 Label try_revoke_bias; | |
2935 Label try_rebias; | |
2936 Address mark_addr = Address(obj_reg, oopDesc::mark_offset_in_bytes()); | |
2937 assert(mark_addr.disp() == 0, "cas must take a zero displacement"); | |
2938 | |
2939 // At this point we know that the header has the bias pattern and | |
2940 // that we are not the bias owner in the current epoch. We need to | |
2941 // figure out more details about the state of the header in order to | |
2942 // know what operations can be legally performed on the object's | |
2943 // header. | |
2944 | |
2945 // If the low three bits in the xor result aren't clear, that means | |
2946 // the prototype header is no longer biased and we have to revoke | |
2947 // the bias on this object. | |
2948 btst(markOopDesc::biased_lock_mask_in_place, temp_reg); | |
2949 brx(Assembler::notZero, false, Assembler::pn, try_revoke_bias); | |
2950 | |
2951 // Biasing is still enabled for this data type. See whether the | |
2952 // epoch of the current bias is still valid, meaning that the epoch | |
2953 // bits of the mark word are equal to the epoch bits of the | |
2954 // prototype header. (Note that the prototype header's epoch bits | |
2955 // only change at a safepoint.) If not, attempt to rebias the object | |
2956 // toward the current thread. Note that we must be absolutely sure | |
2957 // that the current epoch is invalid in order to do this because | |
2958 // otherwise the manipulations it performs on the mark word are | |
2959 // illegal. | |
2960 delayed()->btst(markOopDesc::epoch_mask_in_place, temp_reg); | |
2961 brx(Assembler::notZero, false, Assembler::pn, try_rebias); | |
2962 | |
2963 // The epoch of the current bias is still valid but we know nothing | |
2964 // about the owner; it might be set or it might be clear. Try to | |
2965 // acquire the bias of the object using an atomic operation. If this | |
2966 // fails we will go in to the runtime to revoke the object's bias. | |
2967 // Note that we first construct the presumed unbiased header so we | |
2968 // don't accidentally blow away another thread's valid bias. | |
2969 delayed()->and3(mark_reg, | |
2970 markOopDesc::biased_lock_mask_in_place | markOopDesc::age_mask_in_place | markOopDesc::epoch_mask_in_place, | |
2971 mark_reg); | |
2972 or3(G2_thread, mark_reg, temp_reg); | |
2973 casn(mark_addr.base(), mark_reg, temp_reg); | |
2974 // If the biasing toward our thread failed, this means that | |
2975 // another thread succeeded in biasing it toward itself and we | |
2976 // need to revoke that bias. The revocation will occur in the | |
2977 // interpreter runtime in the slow case. | |
2978 cmp(mark_reg, temp_reg); | |
2979 if (counters != NULL) { | |
2980 cond_inc(Assembler::zero, (address) counters->anonymously_biased_lock_entry_count_addr(), mark_reg, temp_reg); | |
2981 } | |
2982 if (slow_case != NULL) { | |
2983 brx(Assembler::notEqual, true, Assembler::pn, *slow_case); | |
2984 delayed()->nop(); | |
2985 } | |
2986 ba_short(done); | |
2987 | |
2988 bind(try_rebias); | |
2989 // At this point we know the epoch has expired, meaning that the | |
2990 // current "bias owner", if any, is actually invalid. Under these | |
2991 // circumstances _only_, we are allowed to use the current header's | |
2992 // value as the comparison value when doing the cas to acquire the | |
2993 // bias in the current epoch. In other words, we allow transfer of | |
2994 // the bias from one thread to another directly in this situation. | |
2995 // | |
2996 // FIXME: due to a lack of registers we currently blow away the age | |
2997 // bits in this situation. Should attempt to preserve them. | |
2998 load_klass(obj_reg, temp_reg); | |
2999 ld_ptr(Address(temp_reg, Klass::prototype_header_offset()), temp_reg); | |
3000 or3(G2_thread, temp_reg, temp_reg); | |
3001 casn(mark_addr.base(), mark_reg, temp_reg); | |
3002 // If the biasing toward our thread failed, this means that | |
3003 // another thread succeeded in biasing it toward itself and we | |
3004 // need to revoke that bias. The revocation will occur in the | |
3005 // interpreter runtime in the slow case. | |
3006 cmp(mark_reg, temp_reg); | |
3007 if (counters != NULL) { | |
3008 cond_inc(Assembler::zero, (address) counters->rebiased_lock_entry_count_addr(), mark_reg, temp_reg); | |
3009 } | |
3010 if (slow_case != NULL) { | |
3011 brx(Assembler::notEqual, true, Assembler::pn, *slow_case); | |
3012 delayed()->nop(); | |
3013 } | |
3014 ba_short(done); | |
3015 | |
3016 bind(try_revoke_bias); | |
3017 // The prototype mark in the klass doesn't have the bias bit set any | |
3018 // more, indicating that objects of this data type are not supposed | |
3019 // to be biased any more. We are going to try to reset the mark of | |
3020 // this object to the prototype value and fall through to the | |
3021 // CAS-based locking scheme. Note that if our CAS fails, it means | |
3022 // that another thread raced us for the privilege of revoking the | |
3023 // bias of this particular object, so it's okay to continue in the | |
3024 // normal locking code. | |
3025 // | |
3026 // FIXME: due to a lack of registers we currently blow away the age | |
3027 // bits in this situation. Should attempt to preserve them. | |
3028 load_klass(obj_reg, temp_reg); | |
3029 ld_ptr(Address(temp_reg, Klass::prototype_header_offset()), temp_reg); | |
3030 casn(mark_addr.base(), mark_reg, temp_reg); | |
3031 // Fall through to the normal CAS-based lock, because no matter what | |
3032 // the result of the above CAS, some thread must have succeeded in | |
3033 // removing the bias bit from the object's header. | |
3034 if (counters != NULL) { | |
3035 cmp(mark_reg, temp_reg); | |
3036 cond_inc(Assembler::zero, (address) counters->revoked_lock_entry_count_addr(), mark_reg, temp_reg); | |
3037 } | |
3038 | |
3039 bind(cas_label); | |
3040 } | |
3041 | |
3042 void MacroAssembler::biased_locking_exit (Address mark_addr, Register temp_reg, Label& done, | |
3043 bool allow_delay_slot_filling) { | |
3044 // Check for biased locking unlock case, which is a no-op | |
3045 // Note: we do not have to check the thread ID for two reasons. | |
3046 // First, the interpreter checks for IllegalMonitorStateException at | |
3047 // a higher level. Second, if the bias was revoked while we held the | |
3048 // lock, the object could not be rebiased toward another thread, so | |
3049 // the bias bit would be clear. | |
3050 ld_ptr(mark_addr, temp_reg); | |
3051 and3(temp_reg, markOopDesc::biased_lock_mask_in_place, temp_reg); | |
3052 cmp(temp_reg, markOopDesc::biased_lock_pattern); | |
3053 brx(Assembler::equal, allow_delay_slot_filling, Assembler::pt, done); | |
3054 delayed(); | |
3055 if (!allow_delay_slot_filling) { | |
3056 nop(); | |
3057 } | |
3058 } | |
3059 | |
3060 | |
3061 // CASN -- 32-64 bit switch hitter similar to the synthetic CASN provided by | |
3062 // Solaris/SPARC's "as". Another apt name would be cas_ptr() | |
3063 | |
3064 void MacroAssembler::casn (Register addr_reg, Register cmp_reg, Register set_reg ) { | |
3065 casx_under_lock (addr_reg, cmp_reg, set_reg, (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr()); | |
3066 } | |
3067 | |
3068 | |
3069 | |
3070 // compiler_lock_object() and compiler_unlock_object() are direct transliterations | |
3071 // of i486.ad fast_lock() and fast_unlock(). See those methods for detailed comments. | |
3072 // The code could be tightened up considerably. | |
3073 // | |
3074 // box->dhw disposition - post-conditions at DONE_LABEL. | |
3075 // - Successful inflated lock: box->dhw != 0. | |
3076 // Any non-zero value suffices. | |
3077 // Consider G2_thread, rsp, boxReg, or unused_mark() | |
3078 // - Successful Stack-lock: box->dhw == mark. | |
3079 // box->dhw must contain the displaced mark word value | |
3080 // - Failure -- icc.ZFlag == 0 and box->dhw is undefined. | |
3081 // The slow-path fast_enter() and slow_enter() operators | |
3082 // are responsible for setting box->dhw = NonZero (typically ::unused_mark). | |
3083 // - Biased: box->dhw is undefined | |
3084 // | |
3085 // SPARC refworkload performance - specifically jetstream and scimark - are | |
3086 // extremely sensitive to the size of the code emitted by compiler_lock_object | |
3087 // and compiler_unlock_object. Critically, the key factor is code size, not path | |
3088 // length. (Simply experiments to pad CLO with unexecuted NOPs demonstrte the | |
3089 // effect). | |
3090 | |
3091 | |
3092 void MacroAssembler::compiler_lock_object(Register Roop, Register Rmark, | |
3093 Register Rbox, Register Rscratch, | |
3094 BiasedLockingCounters* counters, | |
3095 bool try_bias) { | |
3096 Address mark_addr(Roop, oopDesc::mark_offset_in_bytes()); | |
3097 | |
3098 verify_oop(Roop); | |
3099 Label done ; | |
3100 | |
3101 if (counters != NULL) { | |
3102 inc_counter((address) counters->total_entry_count_addr(), Rmark, Rscratch); | |
3103 } | |
3104 | |
3105 if (EmitSync & 1) { | |
3106 mov(3, Rscratch); | |
3107 st_ptr(Rscratch, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3108 cmp(SP, G0); | |
3109 return ; | |
3110 } | |
3111 | |
3112 if (EmitSync & 2) { | |
3113 | |
3114 // Fetch object's markword | |
3115 ld_ptr(mark_addr, Rmark); | |
3116 | |
3117 if (try_bias) { | |
3118 biased_locking_enter(Roop, Rmark, Rscratch, done, NULL, counters); | |
3119 } | |
3120 | |
3121 // Save Rbox in Rscratch to be used for the cas operation | |
3122 mov(Rbox, Rscratch); | |
3123 | |
3124 // set Rmark to markOop | markOopDesc::unlocked_value | |
3125 or3(Rmark, markOopDesc::unlocked_value, Rmark); | |
3126 | |
3127 // Initialize the box. (Must happen before we update the object mark!) | |
3128 st_ptr(Rmark, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3129 | |
3130 // compare object markOop with Rmark and if equal exchange Rscratch with object markOop | |
3131 assert(mark_addr.disp() == 0, "cas must take a zero displacement"); | |
3132 casx_under_lock(mark_addr.base(), Rmark, Rscratch, | |
3133 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr()); | |
3134 | |
3135 // if compare/exchange succeeded we found an unlocked object and we now have locked it | |
3136 // hence we are done | |
3137 cmp(Rmark, Rscratch); | |
3138 #ifdef _LP64 | |
3139 sub(Rscratch, STACK_BIAS, Rscratch); | |
3140 #endif | |
3141 brx(Assembler::equal, false, Assembler::pt, done); | |
3142 delayed()->sub(Rscratch, SP, Rscratch); //pull next instruction into delay slot | |
3143 | |
3144 // we did not find an unlocked object so see if this is a recursive case | |
3145 // sub(Rscratch, SP, Rscratch); | |
3146 assert(os::vm_page_size() > 0xfff, "page size too small - change the constant"); | |
3147 andcc(Rscratch, 0xfffff003, Rscratch); | |
3148 st_ptr(Rscratch, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3149 bind (done); | |
3150 return ; | |
3151 } | |
3152 | |
3153 Label Egress ; | |
3154 | |
3155 if (EmitSync & 256) { | |
3156 Label IsInflated ; | |
3157 | |
3158 ld_ptr(mark_addr, Rmark); // fetch obj->mark | |
3159 // Triage: biased, stack-locked, neutral, inflated | |
3160 if (try_bias) { | |
3161 biased_locking_enter(Roop, Rmark, Rscratch, done, NULL, counters); | |
3162 // Invariant: if control reaches this point in the emitted stream | |
3163 // then Rmark has not been modified. | |
3164 } | |
3165 | |
3166 // Store mark into displaced mark field in the on-stack basic-lock "box" | |
3167 // Critically, this must happen before the CAS | |
3168 // Maximize the ST-CAS distance to minimize the ST-before-CAS penalty. | |
3169 st_ptr(Rmark, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3170 andcc(Rmark, 2, G0); | |
3171 brx(Assembler::notZero, false, Assembler::pn, IsInflated); | |
3172 delayed()-> | |
3173 | |
3174 // Try stack-lock acquisition. | |
3175 // Beware: the 1st instruction is in a delay slot | |
3176 mov(Rbox, Rscratch); | |
3177 or3(Rmark, markOopDesc::unlocked_value, Rmark); | |
3178 assert(mark_addr.disp() == 0, "cas must take a zero displacement"); | |
3179 casn(mark_addr.base(), Rmark, Rscratch); | |
3180 cmp(Rmark, Rscratch); | |
3181 brx(Assembler::equal, false, Assembler::pt, done); | |
3182 delayed()->sub(Rscratch, SP, Rscratch); | |
3183 | |
3184 // Stack-lock attempt failed - check for recursive stack-lock. | |
3185 // See the comments below about how we might remove this case. | |
3186 #ifdef _LP64 | |
3187 sub(Rscratch, STACK_BIAS, Rscratch); | |
3188 #endif | |
3189 assert(os::vm_page_size() > 0xfff, "page size too small - change the constant"); | |
3190 andcc(Rscratch, 0xfffff003, Rscratch); | |
3191 br(Assembler::always, false, Assembler::pt, done); | |
3192 delayed()-> st_ptr(Rscratch, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3193 | |
3194 bind(IsInflated); | |
3195 if (EmitSync & 64) { | |
3196 // If m->owner != null goto IsLocked | |
3197 // Pessimistic form: Test-and-CAS vs CAS | |
3198 // The optimistic form avoids RTS->RTO cache line upgrades. | |
3199 ld_ptr(Rmark, ObjectMonitor::owner_offset_in_bytes() - 2, Rscratch); | |
3200 andcc(Rscratch, Rscratch, G0); | |
3201 brx(Assembler::notZero, false, Assembler::pn, done); | |
3202 delayed()->nop(); | |
3203 // m->owner == null : it's unlocked. | |
3204 } | |
3205 | |
3206 // Try to CAS m->owner from null to Self | |
3207 // Invariant: if we acquire the lock then _recursions should be 0. | |
3208 add(Rmark, ObjectMonitor::owner_offset_in_bytes()-2, Rmark); | |
3209 mov(G2_thread, Rscratch); | |
3210 casn(Rmark, G0, Rscratch); | |
3211 cmp(Rscratch, G0); | |
3212 // Intentional fall-through into done | |
3213 } else { | |
3214 // Aggressively avoid the Store-before-CAS penalty | |
3215 // Defer the store into box->dhw until after the CAS | |
3216 Label IsInflated, Recursive ; | |
3217 | |
3218 // Anticipate CAS -- Avoid RTS->RTO upgrade | |
3219 // prefetch (mark_addr, Assembler::severalWritesAndPossiblyReads); | |
3220 | |
3221 ld_ptr(mark_addr, Rmark); // fetch obj->mark | |
3222 // Triage: biased, stack-locked, neutral, inflated | |
3223 | |
3224 if (try_bias) { | |
3225 biased_locking_enter(Roop, Rmark, Rscratch, done, NULL, counters); | |
3226 // Invariant: if control reaches this point in the emitted stream | |
3227 // then Rmark has not been modified. | |
3228 } | |
3229 andcc(Rmark, 2, G0); | |
3230 brx(Assembler::notZero, false, Assembler::pn, IsInflated); | |
3231 delayed()-> // Beware - dangling delay-slot | |
3232 | |
3233 // Try stack-lock acquisition. | |
3234 // Transiently install BUSY (0) encoding in the mark word. | |
3235 // if the CAS of 0 into the mark was successful then we execute: | |
3236 // ST box->dhw = mark -- save fetched mark in on-stack basiclock box | |
3237 // ST obj->mark = box -- overwrite transient 0 value | |
3238 // This presumes TSO, of course. | |
3239 | |
3240 mov(0, Rscratch); | |
3241 or3(Rmark, markOopDesc::unlocked_value, Rmark); | |
3242 assert(mark_addr.disp() == 0, "cas must take a zero displacement"); | |
3243 casn(mark_addr.base(), Rmark, Rscratch); | |
3244 // prefetch (mark_addr, Assembler::severalWritesAndPossiblyReads); | |
3245 cmp(Rscratch, Rmark); | |
3246 brx(Assembler::notZero, false, Assembler::pn, Recursive); | |
3247 delayed()->st_ptr(Rmark, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3248 if (counters != NULL) { | |
3249 cond_inc(Assembler::equal, (address) counters->fast_path_entry_count_addr(), Rmark, Rscratch); | |
3250 } | |
3251 ba(done); | |
3252 delayed()->st_ptr(Rbox, mark_addr); | |
3253 | |
3254 bind(Recursive); | |
3255 // Stack-lock attempt failed - check for recursive stack-lock. | |
3256 // Tests show that we can remove the recursive case with no impact | |
3257 // on refworkload 0.83. If we need to reduce the size of the code | |
3258 // emitted by compiler_lock_object() the recursive case is perfect | |
3259 // candidate. | |
3260 // | |
3261 // A more extreme idea is to always inflate on stack-lock recursion. | |
3262 // This lets us eliminate the recursive checks in compiler_lock_object | |
3263 // and compiler_unlock_object and the (box->dhw == 0) encoding. | |
3264 // A brief experiment - requiring changes to synchronizer.cpp, interpreter, | |
3265 // and showed a performance *increase*. In the same experiment I eliminated | |
3266 // the fast-path stack-lock code from the interpreter and always passed | |
3267 // control to the "slow" operators in synchronizer.cpp. | |
3268 | |
3269 // RScratch contains the fetched obj->mark value from the failed CASN. | |
3270 #ifdef _LP64 | |
3271 sub(Rscratch, STACK_BIAS, Rscratch); | |
3272 #endif | |
3273 sub(Rscratch, SP, Rscratch); | |
3274 assert(os::vm_page_size() > 0xfff, "page size too small - change the constant"); | |
3275 andcc(Rscratch, 0xfffff003, Rscratch); | |
3276 if (counters != NULL) { | |
3277 // Accounting needs the Rscratch register | |
3278 st_ptr(Rscratch, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3279 cond_inc(Assembler::equal, (address) counters->fast_path_entry_count_addr(), Rmark, Rscratch); | |
3280 ba_short(done); | |
3281 } else { | |
3282 ba(done); | |
3283 delayed()->st_ptr(Rscratch, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3284 } | |
3285 | |
3286 bind (IsInflated); | |
3287 if (EmitSync & 64) { | |
3288 // If m->owner != null goto IsLocked | |
3289 // Test-and-CAS vs CAS | |
3290 // Pessimistic form avoids futile (doomed) CAS attempts | |
3291 // The optimistic form avoids RTS->RTO cache line upgrades. | |
3292 ld_ptr(Rmark, ObjectMonitor::owner_offset_in_bytes() - 2, Rscratch); | |
3293 andcc(Rscratch, Rscratch, G0); | |
3294 brx(Assembler::notZero, false, Assembler::pn, done); | |
3295 delayed()->nop(); | |
3296 // m->owner == null : it's unlocked. | |
3297 } | |
3298 | |
3299 // Try to CAS m->owner from null to Self | |
3300 // Invariant: if we acquire the lock then _recursions should be 0. | |
3301 add(Rmark, ObjectMonitor::owner_offset_in_bytes()-2, Rmark); | |
3302 mov(G2_thread, Rscratch); | |
3303 casn(Rmark, G0, Rscratch); | |
3304 cmp(Rscratch, G0); | |
3305 // ST box->displaced_header = NonZero. | |
3306 // Any non-zero value suffices: | |
3307 // unused_mark(), G2_thread, RBox, RScratch, rsp, etc. | |
3308 st_ptr(Rbox, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3309 // Intentional fall-through into done | |
3310 } | |
3311 | |
3312 bind (done); | |
3313 } | |
3314 | |
3315 void MacroAssembler::compiler_unlock_object(Register Roop, Register Rmark, | |
3316 Register Rbox, Register Rscratch, | |
3317 bool try_bias) { | |
3318 Address mark_addr(Roop, oopDesc::mark_offset_in_bytes()); | |
3319 | |
3320 Label done ; | |
3321 | |
3322 if (EmitSync & 4) { | |
3323 cmp(SP, G0); | |
3324 return ; | |
3325 } | |
3326 | |
3327 if (EmitSync & 8) { | |
3328 if (try_bias) { | |
3329 biased_locking_exit(mark_addr, Rscratch, done); | |
3330 } | |
3331 | |
3332 // Test first if it is a fast recursive unlock | |
3333 ld_ptr(Rbox, BasicLock::displaced_header_offset_in_bytes(), Rmark); | |
3334 br_null_short(Rmark, Assembler::pt, done); | |
3335 | |
3336 // Check if it is still a light weight lock, this is is true if we see | |
3337 // the stack address of the basicLock in the markOop of the object | |
3338 assert(mark_addr.disp() == 0, "cas must take a zero displacement"); | |
3339 casx_under_lock(mark_addr.base(), Rbox, Rmark, | |
3340 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr()); | |
3341 ba(done); | |
3342 delayed()->cmp(Rbox, Rmark); | |
3343 bind(done); | |
3344 return ; | |
3345 } | |
3346 | |
3347 // Beware ... If the aggregate size of the code emitted by CLO and CUO is | |
3348 // is too large performance rolls abruptly off a cliff. | |
3349 // This could be related to inlining policies, code cache management, or | |
3350 // I$ effects. | |
3351 Label LStacked ; | |
3352 | |
3353 if (try_bias) { | |
3354 // TODO: eliminate redundant LDs of obj->mark | |
3355 biased_locking_exit(mark_addr, Rscratch, done); | |
3356 } | |
3357 | |
3358 ld_ptr(Roop, oopDesc::mark_offset_in_bytes(), Rmark); | |
3359 ld_ptr(Rbox, BasicLock::displaced_header_offset_in_bytes(), Rscratch); | |
3360 andcc(Rscratch, Rscratch, G0); | |
3361 brx(Assembler::zero, false, Assembler::pn, done); | |
3362 delayed()->nop(); // consider: relocate fetch of mark, above, into this DS | |
3363 andcc(Rmark, 2, G0); | |
3364 brx(Assembler::zero, false, Assembler::pt, LStacked); | |
3365 delayed()->nop(); | |
3366 | |
3367 // It's inflated | |
3368 // Conceptually we need a #loadstore|#storestore "release" MEMBAR before | |
3369 // the ST of 0 into _owner which releases the lock. This prevents loads | |
3370 // and stores within the critical section from reordering (floating) | |
3371 // past the store that releases the lock. But TSO is a strong memory model | |
3372 // and that particular flavor of barrier is a noop, so we can safely elide it. | |
3373 // Note that we use 1-0 locking by default for the inflated case. We | |
3374 // close the resultant (and rare) race by having contented threads in | |
3375 // monitorenter periodically poll _owner. | |
3376 ld_ptr(Rmark, ObjectMonitor::owner_offset_in_bytes() - 2, Rscratch); | |
3377 ld_ptr(Rmark, ObjectMonitor::recursions_offset_in_bytes() - 2, Rbox); | |
3378 xor3(Rscratch, G2_thread, Rscratch); | |
3379 orcc(Rbox, Rscratch, Rbox); | |
3380 brx(Assembler::notZero, false, Assembler::pn, done); | |
3381 delayed()-> | |
3382 ld_ptr(Rmark, ObjectMonitor::EntryList_offset_in_bytes() - 2, Rscratch); | |
3383 ld_ptr(Rmark, ObjectMonitor::cxq_offset_in_bytes() - 2, Rbox); | |
3384 orcc(Rbox, Rscratch, G0); | |
3385 if (EmitSync & 65536) { | |
3386 Label LSucc ; | |
3387 brx(Assembler::notZero, false, Assembler::pn, LSucc); | |
3388 delayed()->nop(); | |
3389 ba(done); | |
3390 delayed()->st_ptr(G0, Rmark, ObjectMonitor::owner_offset_in_bytes() - 2); | |
3391 | |
3392 bind(LSucc); | |
3393 st_ptr(G0, Rmark, ObjectMonitor::owner_offset_in_bytes() - 2); | |
3394 if (os::is_MP()) { membar (StoreLoad); } | |
3395 ld_ptr(Rmark, ObjectMonitor::succ_offset_in_bytes() - 2, Rscratch); | |
3396 andcc(Rscratch, Rscratch, G0); | |
3397 brx(Assembler::notZero, false, Assembler::pt, done); | |
3398 delayed()->andcc(G0, G0, G0); | |
3399 add(Rmark, ObjectMonitor::owner_offset_in_bytes()-2, Rmark); | |
3400 mov(G2_thread, Rscratch); | |
3401 casn(Rmark, G0, Rscratch); | |
3402 // invert icc.zf and goto done | |
3403 br_notnull(Rscratch, false, Assembler::pt, done); | |
3404 delayed()->cmp(G0, G0); | |
3405 ba(done); | |
3406 delayed()->cmp(G0, 1); | |
3407 } else { | |
3408 brx(Assembler::notZero, false, Assembler::pn, done); | |
3409 delayed()->nop(); | |
3410 ba(done); | |
3411 delayed()->st_ptr(G0, Rmark, ObjectMonitor::owner_offset_in_bytes() - 2); | |
3412 } | |
3413 | |
3414 bind (LStacked); | |
3415 // Consider: we could replace the expensive CAS in the exit | |
3416 // path with a simple ST of the displaced mark value fetched from | |
3417 // the on-stack basiclock box. That admits a race where a thread T2 | |
3418 // in the slow lock path -- inflating with monitor M -- could race a | |
3419 // thread T1 in the fast unlock path, resulting in a missed wakeup for T2. | |
3420 // More precisely T1 in the stack-lock unlock path could "stomp" the | |
3421 // inflated mark value M installed by T2, resulting in an orphan | |
3422 // object monitor M and T2 becoming stranded. We can remedy that situation | |
3423 // by having T2 periodically poll the object's mark word using timed wait | |
3424 // operations. If T2 discovers that a stomp has occurred it vacates | |
3425 // the monitor M and wakes any other threads stranded on the now-orphan M. | |
3426 // In addition the monitor scavenger, which performs deflation, | |
3427 // would also need to check for orpan monitors and stranded threads. | |
3428 // | |
3429 // Finally, inflation is also used when T2 needs to assign a hashCode | |
3430 // to O and O is stack-locked by T1. The "stomp" race could cause | |
3431 // an assigned hashCode value to be lost. We can avoid that condition | |
3432 // and provide the necessary hashCode stability invariants by ensuring | |
3433 // that hashCode generation is idempotent between copying GCs. | |
3434 // For example we could compute the hashCode of an object O as | |
3435 // O's heap address XOR some high quality RNG value that is refreshed | |
3436 // at GC-time. The monitor scavenger would install the hashCode | |
3437 // found in any orphan monitors. Again, the mechanism admits a | |
3438 // lost-update "stomp" WAW race but detects and recovers as needed. | |
3439 // | |
3440 // A prototype implementation showed excellent results, although | |
3441 // the scavenger and timeout code was rather involved. | |
3442 | |
3443 casn(mark_addr.base(), Rbox, Rscratch); | |
3444 cmp(Rbox, Rscratch); | |
3445 // Intentional fall through into done ... | |
3446 | |
3447 bind(done); | |
3448 } | |
3449 | |
3450 | |
3451 | |
3452 void MacroAssembler::print_CPU_state() { | |
3453 // %%%%% need to implement this | |
3454 } | |
3455 | |
3456 void MacroAssembler::verify_FPU(int stack_depth, const char* s) { | |
3457 // %%%%% need to implement this | |
3458 } | |
3459 | |
3460 void MacroAssembler::push_IU_state() { | |
3461 // %%%%% need to implement this | |
3462 } | |
3463 | |
3464 | |
3465 void MacroAssembler::pop_IU_state() { | |
3466 // %%%%% need to implement this | |
3467 } | |
3468 | |
3469 | |
3470 void MacroAssembler::push_FPU_state() { | |
3471 // %%%%% need to implement this | |
3472 } | |
3473 | |
3474 | |
3475 void MacroAssembler::pop_FPU_state() { | |
3476 // %%%%% need to implement this | |
3477 } | |
3478 | |
3479 | |
3480 void MacroAssembler::push_CPU_state() { | |
3481 // %%%%% need to implement this | |
3482 } | |
3483 | |
3484 | |
3485 void MacroAssembler::pop_CPU_state() { | |
3486 // %%%%% need to implement this | |
3487 } | |
3488 | |
3489 | |
3490 | |
3491 void MacroAssembler::verify_tlab() { | |
3492 #ifdef ASSERT | |
3493 if (UseTLAB && VerifyOops) { | |
3494 Label next, next2, ok; | |
3495 Register t1 = L0; | |
3496 Register t2 = L1; | |
3497 Register t3 = L2; | |
3498 | |
3499 save_frame(0); | |
3500 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_top_offset()), t1); | |
3501 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_start_offset()), t2); | |
3502 or3(t1, t2, t3); | |
3503 cmp_and_br_short(t1, t2, Assembler::greaterEqual, Assembler::pn, next); | |
3504 STOP("assert(top >= start)"); | |
3505 should_not_reach_here(); | |
3506 | |
3507 bind(next); | |
3508 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_top_offset()), t1); | |
3509 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_end_offset()), t2); | |
3510 or3(t3, t2, t3); | |
3511 cmp_and_br_short(t1, t2, Assembler::lessEqual, Assembler::pn, next2); | |
3512 STOP("assert(top <= end)"); | |
3513 should_not_reach_here(); | |
3514 | |
3515 bind(next2); | |
3516 and3(t3, MinObjAlignmentInBytesMask, t3); | |
3517 cmp_and_br_short(t3, 0, Assembler::lessEqual, Assembler::pn, ok); | |
3518 STOP("assert(aligned)"); | |
3519 should_not_reach_here(); | |
3520 | |
3521 bind(ok); | |
3522 restore(); | |
3523 } | |
3524 #endif | |
3525 } | |
3526 | |
3527 | |
3528 void MacroAssembler::eden_allocate( | |
3529 Register obj, // result: pointer to object after successful allocation | |
3530 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise | |
3531 int con_size_in_bytes, // object size in bytes if known at compile time | |
3532 Register t1, // temp register | |
3533 Register t2, // temp register | |
3534 Label& slow_case // continuation point if fast allocation fails | |
3535 ){ | |
3536 // make sure arguments make sense | |
3537 assert_different_registers(obj, var_size_in_bytes, t1, t2); | |
3538 assert(0 <= con_size_in_bytes && Assembler::is_simm13(con_size_in_bytes), "illegal object size"); | |
3539 assert((con_size_in_bytes & MinObjAlignmentInBytesMask) == 0, "object size is not multiple of alignment"); | |
3540 | |
3541 if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) { | |
3542 // No allocation in the shared eden. | |
3543 ba_short(slow_case); | |
3544 } else { | |
3545 // get eden boundaries | |
3546 // note: we need both top & top_addr! | |
3547 const Register top_addr = t1; | |
3548 const Register end = t2; | |
3549 | |
3550 CollectedHeap* ch = Universe::heap(); | |
3551 set((intx)ch->top_addr(), top_addr); | |
3552 intx delta = (intx)ch->end_addr() - (intx)ch->top_addr(); | |
3553 ld_ptr(top_addr, delta, end); | |
3554 ld_ptr(top_addr, 0, obj); | |
3555 | |
3556 // try to allocate | |
3557 Label retry; | |
3558 bind(retry); | |
3559 #ifdef ASSERT | |
3560 // make sure eden top is properly aligned | |
3561 { | |
3562 Label L; | |
3563 btst(MinObjAlignmentInBytesMask, obj); | |
3564 br(Assembler::zero, false, Assembler::pt, L); | |
3565 delayed()->nop(); | |
3566 STOP("eden top is not properly aligned"); | |
3567 bind(L); | |
3568 } | |
3569 #endif // ASSERT | |
3570 const Register free = end; | |
3571 sub(end, obj, free); // compute amount of free space | |
3572 if (var_size_in_bytes->is_valid()) { | |
3573 // size is unknown at compile time | |
3574 cmp(free, var_size_in_bytes); | |
3575 br(Assembler::lessUnsigned, false, Assembler::pn, slow_case); // if there is not enough space go the slow case | |
3576 delayed()->add(obj, var_size_in_bytes, end); | |
3577 } else { | |
3578 // size is known at compile time | |
3579 cmp(free, con_size_in_bytes); | |
3580 br(Assembler::lessUnsigned, false, Assembler::pn, slow_case); // if there is not enough space go the slow case | |
3581 delayed()->add(obj, con_size_in_bytes, end); | |
3582 } | |
3583 // Compare obj with the value at top_addr; if still equal, swap the value of | |
3584 // end with the value at top_addr. If not equal, read the value at top_addr | |
3585 // into end. | |
3586 casx_under_lock(top_addr, obj, end, (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr()); | |
3587 // if someone beat us on the allocation, try again, otherwise continue | |
3588 cmp(obj, end); | |
3589 brx(Assembler::notEqual, false, Assembler::pn, retry); | |
3590 delayed()->mov(end, obj); // nop if successfull since obj == end | |
3591 | |
3592 #ifdef ASSERT | |
3593 // make sure eden top is properly aligned | |
3594 { | |
3595 Label L; | |
3596 const Register top_addr = t1; | |
3597 | |
3598 set((intx)ch->top_addr(), top_addr); | |
3599 ld_ptr(top_addr, 0, top_addr); | |
3600 btst(MinObjAlignmentInBytesMask, top_addr); | |
3601 br(Assembler::zero, false, Assembler::pt, L); | |
3602 delayed()->nop(); | |
3603 STOP("eden top is not properly aligned"); | |
3604 bind(L); | |
3605 } | |
3606 #endif // ASSERT | |
3607 } | |
3608 } | |
3609 | |
3610 | |
3611 void MacroAssembler::tlab_allocate( | |
3612 Register obj, // result: pointer to object after successful allocation | |
3613 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise | |
3614 int con_size_in_bytes, // object size in bytes if known at compile time | |
3615 Register t1, // temp register | |
3616 Label& slow_case // continuation point if fast allocation fails | |
3617 ){ | |
3618 // make sure arguments make sense | |
3619 assert_different_registers(obj, var_size_in_bytes, t1); | |
3620 assert(0 <= con_size_in_bytes && is_simm13(con_size_in_bytes), "illegal object size"); | |
3621 assert((con_size_in_bytes & MinObjAlignmentInBytesMask) == 0, "object size is not multiple of alignment"); | |
3622 | |
3623 const Register free = t1; | |
3624 | |
3625 verify_tlab(); | |
3626 | |
3627 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_top_offset()), obj); | |
3628 | |
3629 // calculate amount of free space | |
3630 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_end_offset()), free); | |
3631 sub(free, obj, free); | |
3632 | |
3633 Label done; | |
3634 if (var_size_in_bytes == noreg) { | |
3635 cmp(free, con_size_in_bytes); | |
3636 } else { | |
3637 cmp(free, var_size_in_bytes); | |
3638 } | |
3639 br(Assembler::less, false, Assembler::pn, slow_case); | |
3640 // calculate the new top pointer | |
3641 if (var_size_in_bytes == noreg) { | |
3642 delayed()->add(obj, con_size_in_bytes, free); | |
3643 } else { | |
3644 delayed()->add(obj, var_size_in_bytes, free); | |
3645 } | |
3646 | |
3647 bind(done); | |
3648 | |
3649 #ifdef ASSERT | |
3650 // make sure new free pointer is properly aligned | |
3651 { | |
3652 Label L; | |
3653 btst(MinObjAlignmentInBytesMask, free); | |
3654 br(Assembler::zero, false, Assembler::pt, L); | |
3655 delayed()->nop(); | |
3656 STOP("updated TLAB free is not properly aligned"); | |
3657 bind(L); | |
3658 } | |
3659 #endif // ASSERT | |
3660 | |
3661 // update the tlab top pointer | |
3662 st_ptr(free, G2_thread, in_bytes(JavaThread::tlab_top_offset())); | |
3663 verify_tlab(); | |
3664 } | |
3665 | |
3666 | |
3667 void MacroAssembler::tlab_refill(Label& retry, Label& try_eden, Label& slow_case) { | |
3668 Register top = O0; | |
3669 Register t1 = G1; | |
3670 Register t2 = G3; | |
3671 Register t3 = O1; | |
3672 assert_different_registers(top, t1, t2, t3, G4, G5 /* preserve G4 and G5 */); | |
3673 Label do_refill, discard_tlab; | |
3674 | |
3675 if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) { | |
3676 // No allocation in the shared eden. | |
3677 ba_short(slow_case); | |
3678 } | |
3679 | |
3680 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_top_offset()), top); | |
3681 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_end_offset()), t1); | |
3682 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_refill_waste_limit_offset()), t2); | |
3683 | |
3684 // calculate amount of free space | |
3685 sub(t1, top, t1); | |
3686 srl_ptr(t1, LogHeapWordSize, t1); | |
3687 | |
3688 // Retain tlab and allocate object in shared space if | |
3689 // the amount free in the tlab is too large to discard. | |
3690 cmp(t1, t2); | |
3691 brx(Assembler::lessEqual, false, Assembler::pt, discard_tlab); | |
3692 | |
3693 // increment waste limit to prevent getting stuck on this slow path | |
3694 delayed()->add(t2, ThreadLocalAllocBuffer::refill_waste_limit_increment(), t2); | |
3695 st_ptr(t2, G2_thread, in_bytes(JavaThread::tlab_refill_waste_limit_offset())); | |
3696 if (TLABStats) { | |
3697 // increment number of slow_allocations | |
3698 ld(G2_thread, in_bytes(JavaThread::tlab_slow_allocations_offset()), t2); | |
3699 add(t2, 1, t2); | |
3700 stw(t2, G2_thread, in_bytes(JavaThread::tlab_slow_allocations_offset())); | |
3701 } | |
3702 ba_short(try_eden); | |
3703 | |
3704 bind(discard_tlab); | |
3705 if (TLABStats) { | |
3706 // increment number of refills | |
3707 ld(G2_thread, in_bytes(JavaThread::tlab_number_of_refills_offset()), t2); | |
3708 add(t2, 1, t2); | |
3709 stw(t2, G2_thread, in_bytes(JavaThread::tlab_number_of_refills_offset())); | |
3710 // accumulate wastage | |
3711 ld(G2_thread, in_bytes(JavaThread::tlab_fast_refill_waste_offset()), t2); | |
3712 add(t2, t1, t2); | |
3713 stw(t2, G2_thread, in_bytes(JavaThread::tlab_fast_refill_waste_offset())); | |
3714 } | |
3715 | |
3716 // if tlab is currently allocated (top or end != null) then | |
3717 // fill [top, end + alignment_reserve) with array object | |
3718 br_null_short(top, Assembler::pn, do_refill); | |
3719 | |
3720 set((intptr_t)markOopDesc::prototype()->copy_set_hash(0x2), t2); | |
3721 st_ptr(t2, top, oopDesc::mark_offset_in_bytes()); // set up the mark word | |
3722 // set klass to intArrayKlass | |
3723 sub(t1, typeArrayOopDesc::header_size(T_INT), t1); | |
3724 add(t1, ThreadLocalAllocBuffer::alignment_reserve(), t1); | |
3725 sll_ptr(t1, log2_intptr(HeapWordSize/sizeof(jint)), t1); | |
3726 st(t1, top, arrayOopDesc::length_offset_in_bytes()); | |
3727 set((intptr_t)Universe::intArrayKlassObj_addr(), t2); | |
3728 ld_ptr(t2, 0, t2); | |
3729 // store klass last. concurrent gcs assumes klass length is valid if | |
3730 // klass field is not null. | |
3731 store_klass(t2, top); | |
3732 verify_oop(top); | |
3733 | |
3734 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_start_offset()), t1); | |
3735 sub(top, t1, t1); // size of tlab's allocated portion | |
3736 incr_allocated_bytes(t1, t2, t3); | |
3737 | |
3738 // refill the tlab with an eden allocation | |
3739 bind(do_refill); | |
3740 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_size_offset()), t1); | |
3741 sll_ptr(t1, LogHeapWordSize, t1); | |
3742 // allocate new tlab, address returned in top | |
3743 eden_allocate(top, t1, 0, t2, t3, slow_case); | |
3744 | |
3745 st_ptr(top, G2_thread, in_bytes(JavaThread::tlab_start_offset())); | |
3746 st_ptr(top, G2_thread, in_bytes(JavaThread::tlab_top_offset())); | |
3747 #ifdef ASSERT | |
3748 // check that tlab_size (t1) is still valid | |
3749 { | |
3750 Label ok; | |
3751 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_size_offset()), t2); | |
3752 sll_ptr(t2, LogHeapWordSize, t2); | |
3753 cmp_and_br_short(t1, t2, Assembler::equal, Assembler::pt, ok); | |
3754 STOP("assert(t1 == tlab_size)"); | |
3755 should_not_reach_here(); | |
3756 | |
3757 bind(ok); | |
3758 } | |
3759 #endif // ASSERT | |
3760 add(top, t1, top); // t1 is tlab_size | |
3761 sub(top, ThreadLocalAllocBuffer::alignment_reserve_in_bytes(), top); | |
3762 st_ptr(top, G2_thread, in_bytes(JavaThread::tlab_end_offset())); | |
3763 verify_tlab(); | |
3764 ba_short(retry); | |
3765 } | |
3766 | |
3767 void MacroAssembler::incr_allocated_bytes(RegisterOrConstant size_in_bytes, | |
3768 Register t1, Register t2) { | |
3769 // Bump total bytes allocated by this thread | |
3770 assert(t1->is_global(), "must be global reg"); // so all 64 bits are saved on a context switch | |
3771 assert_different_registers(size_in_bytes.register_or_noreg(), t1, t2); | |
3772 // v8 support has gone the way of the dodo | |
3773 ldx(G2_thread, in_bytes(JavaThread::allocated_bytes_offset()), t1); | |
3774 add(t1, ensure_simm13_or_reg(size_in_bytes, t2), t1); | |
3775 stx(t1, G2_thread, in_bytes(JavaThread::allocated_bytes_offset())); | |
3776 } | |
3777 | |
3778 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) { | |
3779 switch (cond) { | |
3780 // Note some conditions are synonyms for others | |
3781 case Assembler::never: return Assembler::always; | |
3782 case Assembler::zero: return Assembler::notZero; | |
3783 case Assembler::lessEqual: return Assembler::greater; | |
3784 case Assembler::less: return Assembler::greaterEqual; | |
3785 case Assembler::lessEqualUnsigned: return Assembler::greaterUnsigned; | |
3786 case Assembler::lessUnsigned: return Assembler::greaterEqualUnsigned; | |
3787 case Assembler::negative: return Assembler::positive; | |
3788 case Assembler::overflowSet: return Assembler::overflowClear; | |
3789 case Assembler::always: return Assembler::never; | |
3790 case Assembler::notZero: return Assembler::zero; | |
3791 case Assembler::greater: return Assembler::lessEqual; | |
3792 case Assembler::greaterEqual: return Assembler::less; | |
3793 case Assembler::greaterUnsigned: return Assembler::lessEqualUnsigned; | |
3794 case Assembler::greaterEqualUnsigned: return Assembler::lessUnsigned; | |
3795 case Assembler::positive: return Assembler::negative; | |
3796 case Assembler::overflowClear: return Assembler::overflowSet; | |
3797 } | |
3798 | |
3799 ShouldNotReachHere(); return Assembler::overflowClear; | |
3800 } | |
3801 | |
3802 void MacroAssembler::cond_inc(Assembler::Condition cond, address counter_ptr, | |
3803 Register Rtmp1, Register Rtmp2 /*, Register Rtmp3, Register Rtmp4 */) { | |
3804 Condition negated_cond = negate_condition(cond); | |
3805 Label L; | |
3806 brx(negated_cond, false, Assembler::pt, L); | |
3807 delayed()->nop(); | |
3808 inc_counter(counter_ptr, Rtmp1, Rtmp2); | |
3809 bind(L); | |
3810 } | |
3811 | |
3812 void MacroAssembler::inc_counter(address counter_addr, Register Rtmp1, Register Rtmp2) { | |
3813 AddressLiteral addrlit(counter_addr); | |
3814 sethi(addrlit, Rtmp1); // Move hi22 bits into temporary register. | |
3815 Address addr(Rtmp1, addrlit.low10()); // Build an address with low10 bits. | |
3816 ld(addr, Rtmp2); | |
3817 inc(Rtmp2); | |
3818 st(Rtmp2, addr); | |
3819 } | |
3820 | |
3821 void MacroAssembler::inc_counter(int* counter_addr, Register Rtmp1, Register Rtmp2) { | |
3822 inc_counter((address) counter_addr, Rtmp1, Rtmp2); | |
3823 } | |
3824 | |
3825 SkipIfEqual::SkipIfEqual( | |
3826 MacroAssembler* masm, Register temp, const bool* flag_addr, | |
3827 Assembler::Condition condition) { | |
3828 _masm = masm; | |
3829 AddressLiteral flag(flag_addr); | |
3830 _masm->sethi(flag, temp); | |
3831 _masm->ldub(temp, flag.low10(), temp); | |
3832 _masm->tst(temp); | |
3833 _masm->br(condition, false, Assembler::pt, _label); | |
3834 _masm->delayed()->nop(); | |
3835 } | |
3836 | |
3837 SkipIfEqual::~SkipIfEqual() { | |
3838 _masm->bind(_label); | |
3839 } | |
3840 | |
3841 | |
3842 // Writes to stack successive pages until offset reached to check for | |
3843 // stack overflow + shadow pages. This clobbers tsp and scratch. | |
3844 void MacroAssembler::bang_stack_size(Register Rsize, Register Rtsp, | |
3845 Register Rscratch) { | |
3846 // Use stack pointer in temp stack pointer | |
3847 mov(SP, Rtsp); | |
3848 | |
3849 // Bang stack for total size given plus stack shadow page size. | |
3850 // Bang one page at a time because a large size can overflow yellow and | |
3851 // red zones (the bang will fail but stack overflow handling can't tell that | |
3852 // it was a stack overflow bang vs a regular segv). | |
3853 int offset = os::vm_page_size(); | |
3854 Register Roffset = Rscratch; | |
3855 | |
3856 Label loop; | |
3857 bind(loop); | |
3858 set((-offset)+STACK_BIAS, Rscratch); | |
3859 st(G0, Rtsp, Rscratch); | |
3860 set(offset, Roffset); | |
3861 sub(Rsize, Roffset, Rsize); | |
3862 cmp(Rsize, G0); | |
3863 br(Assembler::greater, false, Assembler::pn, loop); | |
3864 delayed()->sub(Rtsp, Roffset, Rtsp); | |
3865 | |
3866 // Bang down shadow pages too. | |
3867 // The -1 because we already subtracted 1 page. | |
3868 for (int i = 0; i< StackShadowPages-1; i++) { | |
3869 set((-i*offset)+STACK_BIAS, Rscratch); | |
3870 st(G0, Rtsp, Rscratch); | |
3871 } | |
3872 } | |
3873 | |
3874 /////////////////////////////////////////////////////////////////////////////////// | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7476
diff
changeset
|
3875 #if INCLUDE_ALL_GCS |
7204 | 3876 |
3877 static address satb_log_enqueue_with_frame = NULL; | |
3878 static u_char* satb_log_enqueue_with_frame_end = NULL; | |
3879 | |
3880 static address satb_log_enqueue_frameless = NULL; | |
3881 static u_char* satb_log_enqueue_frameless_end = NULL; | |
3882 | |
3883 static int EnqueueCodeSize = 128 DEBUG_ONLY( + 256); // Instructions? | |
3884 | |
3885 static void generate_satb_log_enqueue(bool with_frame) { | |
3886 BufferBlob* bb = BufferBlob::create("enqueue_with_frame", EnqueueCodeSize); | |
3887 CodeBuffer buf(bb); | |
3888 MacroAssembler masm(&buf); | |
3889 | |
3890 #define __ masm. | |
3891 | |
3892 address start = __ pc(); | |
3893 Register pre_val; | |
3894 | |
3895 Label refill, restart; | |
3896 if (with_frame) { | |
3897 __ save_frame(0); | |
3898 pre_val = I0; // Was O0 before the save. | |
3899 } else { | |
3900 pre_val = O0; | |
3901 } | |
3902 | |
3903 int satb_q_index_byte_offset = | |
3904 in_bytes(JavaThread::satb_mark_queue_offset() + | |
3905 PtrQueue::byte_offset_of_index()); | |
3906 | |
3907 int satb_q_buf_byte_offset = | |
3908 in_bytes(JavaThread::satb_mark_queue_offset() + | |
3909 PtrQueue::byte_offset_of_buf()); | |
3910 | |
3911 assert(in_bytes(PtrQueue::byte_width_of_index()) == sizeof(intptr_t) && | |
3912 in_bytes(PtrQueue::byte_width_of_buf()) == sizeof(intptr_t), | |
3913 "check sizes in assembly below"); | |
3914 | |
3915 __ bind(restart); | |
3916 | |
3917 // Load the index into the SATB buffer. PtrQueue::_index is a size_t | |
3918 // so ld_ptr is appropriate. | |
3919 __ ld_ptr(G2_thread, satb_q_index_byte_offset, L0); | |
3920 | |
3921 // index == 0? | |
3922 __ cmp_and_brx_short(L0, G0, Assembler::equal, Assembler::pn, refill); | |
3923 | |
3924 __ ld_ptr(G2_thread, satb_q_buf_byte_offset, L1); | |
3925 __ sub(L0, oopSize, L0); | |
3926 | |
3927 __ st_ptr(pre_val, L1, L0); // [_buf + index] := I0 | |
3928 if (!with_frame) { | |
3929 // Use return-from-leaf | |
3930 __ retl(); | |
3931 __ delayed()->st_ptr(L0, G2_thread, satb_q_index_byte_offset); | |
3932 } else { | |
3933 // Not delayed. | |
3934 __ st_ptr(L0, G2_thread, satb_q_index_byte_offset); | |
3935 } | |
3936 if (with_frame) { | |
3937 __ ret(); | |
3938 __ delayed()->restore(); | |
3939 } | |
3940 __ bind(refill); | |
3941 | |
3942 address handle_zero = | |
3943 CAST_FROM_FN_PTR(address, | |
3944 &SATBMarkQueueSet::handle_zero_index_for_thread); | |
3945 // This should be rare enough that we can afford to save all the | |
3946 // scratch registers that the calling context might be using. | |
3947 __ mov(G1_scratch, L0); | |
3948 __ mov(G3_scratch, L1); | |
3949 __ mov(G4, L2); | |
3950 // We need the value of O0 above (for the write into the buffer), so we | |
3951 // save and restore it. | |
3952 __ mov(O0, L3); | |
3953 // Since the call will overwrite O7, we save and restore that, as well. | |
3954 __ mov(O7, L4); | |
3955 __ call_VM_leaf(L5, handle_zero, G2_thread); | |
3956 __ mov(L0, G1_scratch); | |
3957 __ mov(L1, G3_scratch); | |
3958 __ mov(L2, G4); | |
3959 __ mov(L3, O0); | |
3960 __ br(Assembler::always, /*annul*/false, Assembler::pt, restart); | |
3961 __ delayed()->mov(L4, O7); | |
3962 | |
3963 if (with_frame) { | |
3964 satb_log_enqueue_with_frame = start; | |
3965 satb_log_enqueue_with_frame_end = __ pc(); | |
3966 } else { | |
3967 satb_log_enqueue_frameless = start; | |
3968 satb_log_enqueue_frameless_end = __ pc(); | |
3969 } | |
3970 | |
3971 #undef __ | |
3972 } | |
3973 | |
3974 static inline void generate_satb_log_enqueue_if_necessary(bool with_frame) { | |
3975 if (with_frame) { | |
3976 if (satb_log_enqueue_with_frame == 0) { | |
3977 generate_satb_log_enqueue(with_frame); | |
3978 assert(satb_log_enqueue_with_frame != 0, "postcondition."); | |
3979 if (G1SATBPrintStubs) { | |
3980 tty->print_cr("Generated with-frame satb enqueue:"); | |
3981 Disassembler::decode((u_char*)satb_log_enqueue_with_frame, | |
3982 satb_log_enqueue_with_frame_end, | |
3983 tty); | |
3984 } | |
3985 } | |
3986 } else { | |
3987 if (satb_log_enqueue_frameless == 0) { | |
3988 generate_satb_log_enqueue(with_frame); | |
3989 assert(satb_log_enqueue_frameless != 0, "postcondition."); | |
3990 if (G1SATBPrintStubs) { | |
3991 tty->print_cr("Generated frameless satb enqueue:"); | |
3992 Disassembler::decode((u_char*)satb_log_enqueue_frameless, | |
3993 satb_log_enqueue_frameless_end, | |
3994 tty); | |
3995 } | |
3996 } | |
3997 } | |
3998 } | |
3999 | |
4000 void MacroAssembler::g1_write_barrier_pre(Register obj, | |
4001 Register index, | |
4002 int offset, | |
4003 Register pre_val, | |
4004 Register tmp, | |
4005 bool preserve_o_regs) { | |
4006 Label filtered; | |
4007 | |
4008 if (obj == noreg) { | |
4009 // We are not loading the previous value so make | |
4010 // sure that we don't trash the value in pre_val | |
4011 // with the code below. | |
4012 assert_different_registers(pre_val, tmp); | |
4013 } else { | |
4014 // We will be loading the previous value | |
4015 // in this code so... | |
4016 assert(offset == 0 || index == noreg, "choose one"); | |
4017 assert(pre_val == noreg, "check this code"); | |
4018 } | |
4019 | |
4020 // Is marking active? | |
4021 if (in_bytes(PtrQueue::byte_width_of_active()) == 4) { | |
4022 ld(G2, | |
4023 in_bytes(JavaThread::satb_mark_queue_offset() + | |
4024 PtrQueue::byte_offset_of_active()), | |
4025 tmp); | |
4026 } else { | |
4027 guarantee(in_bytes(PtrQueue::byte_width_of_active()) == 1, | |
4028 "Assumption"); | |
4029 ldsb(G2, | |
4030 in_bytes(JavaThread::satb_mark_queue_offset() + | |
4031 PtrQueue::byte_offset_of_active()), | |
4032 tmp); | |
4033 } | |
4034 | |
4035 // Is marking active? | |
4036 cmp_and_br_short(tmp, G0, Assembler::equal, Assembler::pt, filtered); | |
4037 | |
4038 // Do we need to load the previous value? | |
4039 if (obj != noreg) { | |
4040 // Load the previous value... | |
4041 if (index == noreg) { | |
4042 if (Assembler::is_simm13(offset)) { | |
4043 load_heap_oop(obj, offset, tmp); | |
4044 } else { | |
4045 set(offset, tmp); | |
4046 load_heap_oop(obj, tmp, tmp); | |
4047 } | |
4048 } else { | |
4049 load_heap_oop(obj, index, tmp); | |
4050 } | |
4051 // Previous value has been loaded into tmp | |
4052 pre_val = tmp; | |
4053 } | |
4054 | |
4055 assert(pre_val != noreg, "must have a real register"); | |
4056 | |
4057 // Is the previous value null? | |
4058 cmp_and_brx_short(pre_val, G0, Assembler::equal, Assembler::pt, filtered); | |
4059 | |
4060 // OK, it's not filtered, so we'll need to call enqueue. In the normal | |
4061 // case, pre_val will be a scratch G-reg, but there are some cases in | |
4062 // which it's an O-reg. In the first case, do a normal call. In the | |
4063 // latter, do a save here and call the frameless version. | |
4064 | |
4065 guarantee(pre_val->is_global() || pre_val->is_out(), | |
4066 "Or we need to think harder."); | |
4067 | |
4068 if (pre_val->is_global() && !preserve_o_regs) { | |
4069 generate_satb_log_enqueue_if_necessary(true); // with frame | |
4070 | |
4071 call(satb_log_enqueue_with_frame); | |
4072 delayed()->mov(pre_val, O0); | |
4073 } else { | |
4074 generate_satb_log_enqueue_if_necessary(false); // frameless | |
4075 | |
4076 save_frame(0); | |
4077 call(satb_log_enqueue_frameless); | |
4078 delayed()->mov(pre_val->after_save(), O0); | |
4079 restore(); | |
4080 } | |
4081 | |
4082 bind(filtered); | |
4083 } | |
4084 | |
4085 static address dirty_card_log_enqueue = 0; | |
4086 static u_char* dirty_card_log_enqueue_end = 0; | |
4087 | |
4088 // This gets to assume that o0 contains the object address. | |
4089 static void generate_dirty_card_log_enqueue(jbyte* byte_map_base) { | |
4090 BufferBlob* bb = BufferBlob::create("dirty_card_enqueue", EnqueueCodeSize*2); | |
4091 CodeBuffer buf(bb); | |
4092 MacroAssembler masm(&buf); | |
4093 #define __ masm. | |
4094 address start = __ pc(); | |
4095 | |
4096 Label not_already_dirty, restart, refill; | |
4097 | |
4098 #ifdef _LP64 | |
4099 __ srlx(O0, CardTableModRefBS::card_shift, O0); | |
4100 #else | |
4101 __ srl(O0, CardTableModRefBS::card_shift, O0); | |
4102 #endif | |
4103 AddressLiteral addrlit(byte_map_base); | |
4104 __ set(addrlit, O1); // O1 := <card table base> | |
4105 __ ldub(O0, O1, O2); // O2 := [O0 + O1] | |
4106 | |
4107 assert(CardTableModRefBS::dirty_card_val() == 0, "otherwise check this code"); | |
4108 __ cmp_and_br_short(O2, G0, Assembler::notEqual, Assembler::pt, not_already_dirty); | |
4109 | |
4110 // We didn't take the branch, so we're already dirty: return. | |
4111 // Use return-from-leaf | |
4112 __ retl(); | |
4113 __ delayed()->nop(); | |
4114 | |
4115 // Not dirty. | |
4116 __ bind(not_already_dirty); | |
4117 | |
4118 // Get O0 + O1 into a reg by itself | |
4119 __ add(O0, O1, O3); | |
4120 | |
4121 // First, dirty it. | |
4122 __ stb(G0, O3, G0); // [cardPtr] := 0 (i.e., dirty). | |
4123 | |
4124 int dirty_card_q_index_byte_offset = | |
4125 in_bytes(JavaThread::dirty_card_queue_offset() + | |
4126 PtrQueue::byte_offset_of_index()); | |
4127 int dirty_card_q_buf_byte_offset = | |
4128 in_bytes(JavaThread::dirty_card_queue_offset() + | |
4129 PtrQueue::byte_offset_of_buf()); | |
4130 __ bind(restart); | |
4131 | |
4132 // Load the index into the update buffer. PtrQueue::_index is | |
4133 // a size_t so ld_ptr is appropriate here. | |
4134 __ ld_ptr(G2_thread, dirty_card_q_index_byte_offset, L0); | |
4135 | |
4136 // index == 0? | |
4137 __ cmp_and_brx_short(L0, G0, Assembler::equal, Assembler::pn, refill); | |
4138 | |
4139 __ ld_ptr(G2_thread, dirty_card_q_buf_byte_offset, L1); | |
4140 __ sub(L0, oopSize, L0); | |
4141 | |
4142 __ st_ptr(O3, L1, L0); // [_buf + index] := I0 | |
4143 // Use return-from-leaf | |
4144 __ retl(); | |
4145 __ delayed()->st_ptr(L0, G2_thread, dirty_card_q_index_byte_offset); | |
4146 | |
4147 __ bind(refill); | |
4148 address handle_zero = | |
4149 CAST_FROM_FN_PTR(address, | |
4150 &DirtyCardQueueSet::handle_zero_index_for_thread); | |
4151 // This should be rare enough that we can afford to save all the | |
4152 // scratch registers that the calling context might be using. | |
4153 __ mov(G1_scratch, L3); | |
4154 __ mov(G3_scratch, L5); | |
4155 // We need the value of O3 above (for the write into the buffer), so we | |
4156 // save and restore it. | |
4157 __ mov(O3, L6); | |
4158 // Since the call will overwrite O7, we save and restore that, as well. | |
4159 __ mov(O7, L4); | |
4160 | |
4161 __ call_VM_leaf(L7_thread_cache, handle_zero, G2_thread); | |
4162 __ mov(L3, G1_scratch); | |
4163 __ mov(L5, G3_scratch); | |
4164 __ mov(L6, O3); | |
4165 __ br(Assembler::always, /*annul*/false, Assembler::pt, restart); | |
4166 __ delayed()->mov(L4, O7); | |
4167 | |
4168 dirty_card_log_enqueue = start; | |
4169 dirty_card_log_enqueue_end = __ pc(); | |
4170 // XXX Should have a guarantee here about not going off the end! | |
4171 // Does it already do so? Do an experiment... | |
4172 | |
4173 #undef __ | |
4174 | |
4175 } | |
4176 | |
4177 static inline void | |
4178 generate_dirty_card_log_enqueue_if_necessary(jbyte* byte_map_base) { | |
4179 if (dirty_card_log_enqueue == 0) { | |
4180 generate_dirty_card_log_enqueue(byte_map_base); | |
4181 assert(dirty_card_log_enqueue != 0, "postcondition."); | |
4182 if (G1SATBPrintStubs) { | |
4183 tty->print_cr("Generated dirty_card enqueue:"); | |
4184 Disassembler::decode((u_char*)dirty_card_log_enqueue, | |
4185 dirty_card_log_enqueue_end, | |
4186 tty); | |
4187 } | |
4188 } | |
4189 } | |
4190 | |
4191 | |
4192 void MacroAssembler::g1_write_barrier_post(Register store_addr, Register new_val, Register tmp) { | |
4193 | |
4194 Label filtered; | |
4195 MacroAssembler* post_filter_masm = this; | |
4196 | |
4197 if (new_val == G0) return; | |
4198 | |
4199 G1SATBCardTableModRefBS* bs = (G1SATBCardTableModRefBS*) Universe::heap()->barrier_set(); | |
4200 assert(bs->kind() == BarrierSet::G1SATBCT || | |
4201 bs->kind() == BarrierSet::G1SATBCTLogging, "wrong barrier"); | |
4202 | |
4203 if (G1RSBarrierRegionFilter) { | |
4204 xor3(store_addr, new_val, tmp); | |
4205 #ifdef _LP64 | |
4206 srlx(tmp, HeapRegion::LogOfHRGrainBytes, tmp); | |
4207 #else | |
4208 srl(tmp, HeapRegion::LogOfHRGrainBytes, tmp); | |
4209 #endif | |
4210 | |
4211 // XXX Should I predict this taken or not? Does it matter? | |
4212 cmp_and_brx_short(tmp, G0, Assembler::equal, Assembler::pt, filtered); | |
4213 } | |
4214 | |
4215 // If the "store_addr" register is an "in" or "local" register, move it to | |
4216 // a scratch reg so we can pass it as an argument. | |
4217 bool use_scr = !(store_addr->is_global() || store_addr->is_out()); | |
4218 // Pick a scratch register different from "tmp". | |
4219 Register scr = (tmp == G1_scratch ? G3_scratch : G1_scratch); | |
4220 // Make sure we use up the delay slot! | |
4221 if (use_scr) { | |
4222 post_filter_masm->mov(store_addr, scr); | |
4223 } else { | |
4224 post_filter_masm->nop(); | |
4225 } | |
4226 generate_dirty_card_log_enqueue_if_necessary(bs->byte_map_base); | |
4227 save_frame(0); | |
4228 call(dirty_card_log_enqueue); | |
4229 if (use_scr) { | |
4230 delayed()->mov(scr, O0); | |
4231 } else { | |
4232 delayed()->mov(store_addr->after_save(), O0); | |
4233 } | |
4234 restore(); | |
4235 | |
4236 bind(filtered); | |
4237 } | |
4238 | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7476
diff
changeset
|
4239 #endif // INCLUDE_ALL_GCS |
7204 | 4240 /////////////////////////////////////////////////////////////////////////////////// |
4241 | |
4242 void MacroAssembler::card_write_barrier_post(Register store_addr, Register new_val, Register tmp) { | |
4243 // If we're writing constant NULL, we can skip the write barrier. | |
4244 if (new_val == G0) return; | |
4245 CardTableModRefBS* bs = (CardTableModRefBS*) Universe::heap()->barrier_set(); | |
4246 assert(bs->kind() == BarrierSet::CardTableModRef || | |
4247 bs->kind() == BarrierSet::CardTableExtension, "wrong barrier"); | |
4248 card_table_write(bs->byte_map_base, tmp, store_addr); | |
4249 } | |
4250 | |
4251 void MacroAssembler::load_klass(Register src_oop, Register klass) { | |
4252 // The number of bytes in this code is used by | |
4253 // MachCallDynamicJavaNode::ret_addr_offset() | |
4254 // if this changes, change that. | |
4255 if (UseCompressedKlassPointers) { | |
4256 lduw(src_oop, oopDesc::klass_offset_in_bytes(), klass); | |
4257 decode_klass_not_null(klass); | |
4258 } else { | |
4259 ld_ptr(src_oop, oopDesc::klass_offset_in_bytes(), klass); | |
4260 } | |
4261 } | |
4262 | |
4263 void MacroAssembler::store_klass(Register klass, Register dst_oop) { | |
4264 if (UseCompressedKlassPointers) { | |
4265 assert(dst_oop != klass, "not enough registers"); | |
4266 encode_klass_not_null(klass); | |
4267 st(klass, dst_oop, oopDesc::klass_offset_in_bytes()); | |
4268 } else { | |
4269 st_ptr(klass, dst_oop, oopDesc::klass_offset_in_bytes()); | |
4270 } | |
4271 } | |
4272 | |
4273 void MacroAssembler::store_klass_gap(Register s, Register d) { | |
4274 if (UseCompressedKlassPointers) { | |
4275 assert(s != d, "not enough registers"); | |
4276 st(s, d, oopDesc::klass_gap_offset_in_bytes()); | |
4277 } | |
4278 } | |
4279 | |
4280 void MacroAssembler::load_heap_oop(const Address& s, Register d) { | |
4281 if (UseCompressedOops) { | |
4282 lduw(s, d); | |
4283 decode_heap_oop(d); | |
4284 } else { | |
4285 ld_ptr(s, d); | |
4286 } | |
4287 } | |
4288 | |
4289 void MacroAssembler::load_heap_oop(Register s1, Register s2, Register d) { | |
4290 if (UseCompressedOops) { | |
4291 lduw(s1, s2, d); | |
4292 decode_heap_oop(d, d); | |
4293 } else { | |
4294 ld_ptr(s1, s2, d); | |
4295 } | |
4296 } | |
4297 | |
4298 void MacroAssembler::load_heap_oop(Register s1, int simm13a, Register d) { | |
4299 if (UseCompressedOops) { | |
4300 lduw(s1, simm13a, d); | |
4301 decode_heap_oop(d, d); | |
4302 } else { | |
4303 ld_ptr(s1, simm13a, d); | |
4304 } | |
4305 } | |
4306 | |
4307 void MacroAssembler::load_heap_oop(Register s1, RegisterOrConstant s2, Register d) { | |
4308 if (s2.is_constant()) load_heap_oop(s1, s2.as_constant(), d); | |
4309 else load_heap_oop(s1, s2.as_register(), d); | |
4310 } | |
4311 | |
4312 void MacroAssembler::store_heap_oop(Register d, Register s1, Register s2) { | |
4313 if (UseCompressedOops) { | |
4314 assert(s1 != d && s2 != d, "not enough registers"); | |
4315 encode_heap_oop(d); | |
4316 st(d, s1, s2); | |
4317 } else { | |
4318 st_ptr(d, s1, s2); | |
4319 } | |
4320 } | |
4321 | |
4322 void MacroAssembler::store_heap_oop(Register d, Register s1, int simm13a) { | |
4323 if (UseCompressedOops) { | |
4324 assert(s1 != d, "not enough registers"); | |
4325 encode_heap_oop(d); | |
4326 st(d, s1, simm13a); | |
4327 } else { | |
4328 st_ptr(d, s1, simm13a); | |
4329 } | |
4330 } | |
4331 | |
4332 void MacroAssembler::store_heap_oop(Register d, const Address& a, int offset) { | |
4333 if (UseCompressedOops) { | |
4334 assert(a.base() != d, "not enough registers"); | |
4335 encode_heap_oop(d); | |
4336 st(d, a, offset); | |
4337 } else { | |
4338 st_ptr(d, a, offset); | |
4339 } | |
4340 } | |
4341 | |
4342 | |
4343 void MacroAssembler::encode_heap_oop(Register src, Register dst) { | |
4344 assert (UseCompressedOops, "must be compressed"); | |
4345 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
4346 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
4347 verify_oop(src); | |
4348 if (Universe::narrow_oop_base() == NULL) { | |
4349 srlx(src, LogMinObjAlignmentInBytes, dst); | |
4350 return; | |
4351 } | |
4352 Label done; | |
4353 if (src == dst) { | |
4354 // optimize for frequent case src == dst | |
4355 bpr(rc_nz, true, Assembler::pt, src, done); | |
4356 delayed() -> sub(src, G6_heapbase, dst); // annuled if not taken | |
4357 bind(done); | |
4358 srlx(src, LogMinObjAlignmentInBytes, dst); | |
4359 } else { | |
4360 bpr(rc_z, false, Assembler::pn, src, done); | |
4361 delayed() -> mov(G0, dst); | |
4362 // could be moved before branch, and annulate delay, | |
4363 // but may add some unneeded work decoding null | |
4364 sub(src, G6_heapbase, dst); | |
4365 srlx(dst, LogMinObjAlignmentInBytes, dst); | |
4366 bind(done); | |
4367 } | |
4368 } | |
4369 | |
4370 | |
4371 void MacroAssembler::encode_heap_oop_not_null(Register r) { | |
4372 assert (UseCompressedOops, "must be compressed"); | |
4373 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
4374 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
4375 verify_oop(r); | |
4376 if (Universe::narrow_oop_base() != NULL) | |
4377 sub(r, G6_heapbase, r); | |
4378 srlx(r, LogMinObjAlignmentInBytes, r); | |
4379 } | |
4380 | |
4381 void MacroAssembler::encode_heap_oop_not_null(Register src, Register dst) { | |
4382 assert (UseCompressedOops, "must be compressed"); | |
4383 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
4384 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
4385 verify_oop(src); | |
4386 if (Universe::narrow_oop_base() == NULL) { | |
4387 srlx(src, LogMinObjAlignmentInBytes, dst); | |
4388 } else { | |
4389 sub(src, G6_heapbase, dst); | |
4390 srlx(dst, LogMinObjAlignmentInBytes, dst); | |
4391 } | |
4392 } | |
4393 | |
4394 // Same algorithm as oops.inline.hpp decode_heap_oop. | |
4395 void MacroAssembler::decode_heap_oop(Register src, Register dst) { | |
4396 assert (UseCompressedOops, "must be compressed"); | |
4397 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
4398 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
4399 sllx(src, LogMinObjAlignmentInBytes, dst); | |
4400 if (Universe::narrow_oop_base() != NULL) { | |
4401 Label done; | |
4402 bpr(rc_nz, true, Assembler::pt, dst, done); | |
4403 delayed() -> add(dst, G6_heapbase, dst); // annuled if not taken | |
4404 bind(done); | |
4405 } | |
4406 verify_oop(dst); | |
4407 } | |
4408 | |
4409 void MacroAssembler::decode_heap_oop_not_null(Register r) { | |
4410 // Do not add assert code to this unless you change vtableStubs_sparc.cpp | |
4411 // pd_code_size_limit. | |
4412 // Also do not verify_oop as this is called by verify_oop. | |
4413 assert (UseCompressedOops, "must be compressed"); | |
4414 assert (Universe::heap() != NULL, "java heap should be initialized"); | |
4415 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
4416 sllx(r, LogMinObjAlignmentInBytes, r); | |
4417 if (Universe::narrow_oop_base() != NULL) | |
4418 add(r, G6_heapbase, r); | |
4419 } | |
4420 | |
4421 void MacroAssembler::decode_heap_oop_not_null(Register src, Register dst) { | |
4422 // Do not add assert code to this unless you change vtableStubs_sparc.cpp | |
4423 // pd_code_size_limit. | |
4424 // Also do not verify_oop as this is called by verify_oop. | |
4425 assert (UseCompressedOops, "must be compressed"); | |
4426 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); | |
4427 sllx(src, LogMinObjAlignmentInBytes, dst); | |
4428 if (Universe::narrow_oop_base() != NULL) | |
4429 add(dst, G6_heapbase, dst); | |
4430 } | |
4431 | |
4432 void MacroAssembler::encode_klass_not_null(Register r) { | |
4433 assert(Metaspace::is_initialized(), "metaspace should be initialized"); | |
4434 assert (UseCompressedKlassPointers, "must be compressed"); | |
4435 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); | |
4436 if (Universe::narrow_klass_base() != NULL) | |
4437 sub(r, G6_heapbase, r); | |
4438 srlx(r, LogKlassAlignmentInBytes, r); | |
4439 } | |
4440 | |
4441 void MacroAssembler::encode_klass_not_null(Register src, Register dst) { | |
4442 assert(Metaspace::is_initialized(), "metaspace should be initialized"); | |
4443 assert (UseCompressedKlassPointers, "must be compressed"); | |
4444 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); | |
4445 if (Universe::narrow_klass_base() == NULL) { | |
4446 srlx(src, LogKlassAlignmentInBytes, dst); | |
4447 } else { | |
4448 sub(src, G6_heapbase, dst); | |
4449 srlx(dst, LogKlassAlignmentInBytes, dst); | |
4450 } | |
4451 } | |
4452 | |
4453 void MacroAssembler::decode_klass_not_null(Register r) { | |
4454 assert(Metaspace::is_initialized(), "metaspace should be initialized"); | |
4455 // Do not add assert code to this unless you change vtableStubs_sparc.cpp | |
4456 // pd_code_size_limit. | |
4457 assert (UseCompressedKlassPointers, "must be compressed"); | |
4458 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); | |
4459 sllx(r, LogKlassAlignmentInBytes, r); | |
4460 if (Universe::narrow_klass_base() != NULL) | |
4461 add(r, G6_heapbase, r); | |
4462 } | |
4463 | |
4464 void MacroAssembler::decode_klass_not_null(Register src, Register dst) { | |
4465 assert(Metaspace::is_initialized(), "metaspace should be initialized"); | |
4466 // Do not add assert code to this unless you change vtableStubs_sparc.cpp | |
4467 // pd_code_size_limit. | |
4468 assert (UseCompressedKlassPointers, "must be compressed"); | |
4469 assert (LogKlassAlignmentInBytes == Universe::narrow_klass_shift(), "decode alg wrong"); | |
4470 sllx(src, LogKlassAlignmentInBytes, dst); | |
4471 if (Universe::narrow_klass_base() != NULL) | |
4472 add(dst, G6_heapbase, dst); | |
4473 } | |
4474 | |
4475 void MacroAssembler::reinit_heapbase() { | |
4476 if (UseCompressedOops || UseCompressedKlassPointers) { | |
4477 AddressLiteral base(Universe::narrow_ptrs_base_addr()); | |
4478 load_ptr_contents(base, G6_heapbase); | |
4479 } | |
4480 } | |
4481 | |
4482 // Compare char[] arrays aligned to 4 bytes. | |
4483 void MacroAssembler::char_arrays_equals(Register ary1, Register ary2, | |
4484 Register limit, Register result, | |
4485 Register chr1, Register chr2, Label& Ldone) { | |
4486 Label Lvector, Lloop; | |
4487 assert(chr1 == result, "should be the same"); | |
4488 | |
4489 // Note: limit contains number of bytes (2*char_elements) != 0. | |
4490 andcc(limit, 0x2, chr1); // trailing character ? | |
4491 br(Assembler::zero, false, Assembler::pt, Lvector); | |
4492 delayed()->nop(); | |
4493 | |
4494 // compare the trailing char | |
4495 sub(limit, sizeof(jchar), limit); | |
4496 lduh(ary1, limit, chr1); | |
4497 lduh(ary2, limit, chr2); | |
4498 cmp(chr1, chr2); | |
4499 br(Assembler::notEqual, true, Assembler::pt, Ldone); | |
4500 delayed()->mov(G0, result); // not equal | |
4501 | |
4502 // only one char ? | |
4503 cmp_zero_and_br(zero, limit, Ldone, true, Assembler::pn); | |
4504 delayed()->add(G0, 1, result); // zero-length arrays are equal | |
4505 | |
4506 // word by word compare, dont't need alignment check | |
4507 bind(Lvector); | |
4508 // Shift ary1 and ary2 to the end of the arrays, negate limit | |
4509 add(ary1, limit, ary1); | |
4510 add(ary2, limit, ary2); | |
4511 neg(limit, limit); | |
4512 | |
4513 lduw(ary1, limit, chr1); | |
4514 bind(Lloop); | |
4515 lduw(ary2, limit, chr2); | |
4516 cmp(chr1, chr2); | |
4517 br(Assembler::notEqual, true, Assembler::pt, Ldone); | |
4518 delayed()->mov(G0, result); // not equal | |
4519 inccc(limit, 2*sizeof(jchar)); | |
4520 // annul LDUW if branch is not taken to prevent access past end of array | |
4521 br(Assembler::notZero, true, Assembler::pt, Lloop); | |
4522 delayed()->lduw(ary1, limit, chr1); // hoisted | |
4523 | |
4524 // Caller should set it: | |
4525 // add(G0, 1, result); // equals | |
4526 } | |
4527 | |
4528 // Use BIS for zeroing (count is in bytes). | |
4529 void MacroAssembler::bis_zeroing(Register to, Register count, Register temp, Label& Ldone) { | |
4530 assert(UseBlockZeroing && VM_Version::has_block_zeroing(), "only works with BIS zeroing"); | |
4531 Register end = count; | |
4532 int cache_line_size = VM_Version::prefetch_data_size(); | |
4533 // Minimum count when BIS zeroing can be used since | |
4534 // it needs membar which is expensive. | |
4535 int block_zero_size = MAX2(cache_line_size*3, (int)BlockZeroingLowLimit); | |
4536 | |
4537 Label small_loop; | |
4538 // Check if count is negative (dead code) or zero. | |
4539 // Note, count uses 64bit in 64 bit VM. | |
4540 cmp_and_brx_short(count, 0, Assembler::lessEqual, Assembler::pn, Ldone); | |
4541 | |
4542 // Use BIS zeroing only for big arrays since it requires membar. | |
4543 if (Assembler::is_simm13(block_zero_size)) { // < 4096 | |
4544 cmp(count, block_zero_size); | |
4545 } else { | |
4546 set(block_zero_size, temp); | |
4547 cmp(count, temp); | |
4548 } | |
4549 br(Assembler::lessUnsigned, false, Assembler::pt, small_loop); | |
4550 delayed()->add(to, count, end); | |
4551 | |
4552 // Note: size is >= three (32 bytes) cache lines. | |
4553 | |
4554 // Clean the beginning of space up to next cache line. | |
4555 for (int offs = 0; offs < cache_line_size; offs += 8) { | |
4556 stx(G0, to, offs); | |
4557 } | |
4558 | |
4559 // align to next cache line | |
4560 add(to, cache_line_size, to); | |
4561 and3(to, -cache_line_size, to); | |
4562 | |
4563 // Note: size left >= two (32 bytes) cache lines. | |
4564 | |
4565 // BIS should not be used to zero tail (64 bytes) | |
4566 // to avoid zeroing a header of the following object. | |
4567 sub(end, (cache_line_size*2)-8, end); | |
4568 | |
4569 Label bis_loop; | |
4570 bind(bis_loop); | |
4571 stxa(G0, to, G0, Assembler::ASI_ST_BLKINIT_PRIMARY); | |
4572 add(to, cache_line_size, to); | |
4573 cmp_and_brx_short(to, end, Assembler::lessUnsigned, Assembler::pt, bis_loop); | |
4574 | |
4575 // BIS needs membar. | |
4576 membar(Assembler::StoreLoad); | |
4577 | |
4578 add(end, (cache_line_size*2)-8, end); // restore end | |
4579 cmp_and_brx_short(to, end, Assembler::greaterEqualUnsigned, Assembler::pn, Ldone); | |
4580 | |
4581 // Clean the tail. | |
4582 bind(small_loop); | |
4583 stx(G0, to, 0); | |
4584 add(to, 8, to); | |
4585 cmp_and_brx_short(to, end, Assembler::lessUnsigned, Assembler::pt, small_loop); | |
4586 nop(); // Separate short branches | |
4587 } |