Thu, 05 Jun 2008 15:57:56 -0700
6711316: Open source the Garbage-First garbage collector
Summary: First mercurial integration of the code for the Garbage-First garbage collector.
Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr
1 /*
2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 #include "incls/_precompiled.incl"
26 #include "incls/_assembler_sparc.cpp.incl"
28 // Implementation of Address
30 Address::Address( addr_type t, int which ) {
31 switch (t) {
32 case extra_in_argument:
33 case extra_out_argument:
34 _base = t == extra_in_argument ? FP : SP;
35 _hi = 0;
36 // Warning: In LP64 mode, _disp will occupy more than 10 bits.
37 // This is inconsistent with the other constructors but op
38 // codes such as ld or ldx, only access disp() to get their
39 // simm13 argument.
40 _disp = ((which - Argument::n_register_parameters + frame::memory_parameter_word_sp_offset) * BytesPerWord) + STACK_BIAS;
41 break;
42 default:
43 ShouldNotReachHere();
44 break;
45 }
46 }
48 static const char* argumentNames[][2] = {
49 {"A0","P0"}, {"A1","P1"}, {"A2","P2"}, {"A3","P3"}, {"A4","P4"},
50 {"A5","P5"}, {"A6","P6"}, {"A7","P7"}, {"A8","P8"}, {"A9","P9"},
51 {"A(n>9)","P(n>9)"}
52 };
54 const char* Argument::name() const {
55 int nofArgs = sizeof argumentNames / sizeof argumentNames[0];
56 int num = number();
57 if (num >= nofArgs) num = nofArgs - 1;
58 return argumentNames[num][is_in() ? 1 : 0];
59 }
61 void Assembler::print_instruction(int inst) {
62 const char* s;
63 switch (inv_op(inst)) {
64 default: s = "????"; break;
65 case call_op: s = "call"; break;
66 case branch_op:
67 switch (inv_op2(inst)) {
68 case bpr_op2: s = "bpr"; break;
69 case fb_op2: s = "fb"; break;
70 case fbp_op2: s = "fbp"; break;
71 case br_op2: s = "br"; break;
72 case bp_op2: s = "bp"; break;
73 case cb_op2: s = "cb"; break;
74 default: s = "????"; break;
75 }
76 }
77 ::tty->print("%s", s);
78 }
81 // Patch instruction inst at offset inst_pos to refer to dest_pos
82 // and return the resulting instruction.
83 // We should have pcs, not offsets, but since all is relative, it will work out
84 // OK.
85 int Assembler::patched_branch(int dest_pos, int inst, int inst_pos) {
87 int m; // mask for displacement field
88 int v; // new value for displacement field
89 const int word_aligned_ones = -4;
90 switch (inv_op(inst)) {
91 default: ShouldNotReachHere();
92 case call_op: m = wdisp(word_aligned_ones, 0, 30); v = wdisp(dest_pos, inst_pos, 30); break;
93 case branch_op:
94 switch (inv_op2(inst)) {
95 case bpr_op2: m = wdisp16(word_aligned_ones, 0); v = wdisp16(dest_pos, inst_pos); break;
96 case fbp_op2: m = wdisp( word_aligned_ones, 0, 19); v = wdisp( dest_pos, inst_pos, 19); break;
97 case bp_op2: m = wdisp( word_aligned_ones, 0, 19); v = wdisp( dest_pos, inst_pos, 19); break;
98 case fb_op2: m = wdisp( word_aligned_ones, 0, 22); v = wdisp( dest_pos, inst_pos, 22); break;
99 case br_op2: m = wdisp( word_aligned_ones, 0, 22); v = wdisp( dest_pos, inst_pos, 22); break;
100 case cb_op2: m = wdisp( word_aligned_ones, 0, 22); v = wdisp( dest_pos, inst_pos, 22); break;
101 default: ShouldNotReachHere();
102 }
103 }
104 return inst & ~m | v;
105 }
107 // Return the offset of the branch destionation of instruction inst
108 // at offset pos.
109 // Should have pcs, but since all is relative, it works out.
110 int Assembler::branch_destination(int inst, int pos) {
111 int r;
112 switch (inv_op(inst)) {
113 default: ShouldNotReachHere();
114 case call_op: r = inv_wdisp(inst, pos, 30); break;
115 case branch_op:
116 switch (inv_op2(inst)) {
117 case bpr_op2: r = inv_wdisp16(inst, pos); break;
118 case fbp_op2: r = inv_wdisp( inst, pos, 19); break;
119 case bp_op2: r = inv_wdisp( inst, pos, 19); break;
120 case fb_op2: r = inv_wdisp( inst, pos, 22); break;
121 case br_op2: r = inv_wdisp( inst, pos, 22); break;
122 case cb_op2: r = inv_wdisp( inst, pos, 22); break;
123 default: ShouldNotReachHere();
124 }
125 }
126 return r;
127 }
129 int AbstractAssembler::code_fill_byte() {
130 return 0x00; // illegal instruction 0x00000000
131 }
133 Assembler::Condition Assembler::reg_cond_to_cc_cond(Assembler::RCondition in) {
134 switch (in) {
135 case rc_z: return equal;
136 case rc_lez: return lessEqual;
137 case rc_lz: return less;
138 case rc_nz: return notEqual;
139 case rc_gz: return greater;
140 case rc_gez: return greaterEqual;
141 default:
142 ShouldNotReachHere();
143 }
144 return equal;
145 }
147 // Generate a bunch 'o stuff (including v9's
148 #ifndef PRODUCT
149 void Assembler::test_v9() {
150 add( G0, G1, G2 );
151 add( G3, 0, G4 );
153 addcc( G5, G6, G7 );
154 addcc( I0, 1, I1 );
155 addc( I2, I3, I4 );
156 addc( I5, -1, I6 );
157 addccc( I7, L0, L1 );
158 addccc( L2, (1 << 12) - 2, L3 );
160 Label lbl1, lbl2, lbl3;
162 bind(lbl1);
164 bpr( rc_z, true, pn, L4, pc(), relocInfo::oop_type );
165 delayed()->nop();
166 bpr( rc_lez, false, pt, L5, lbl1);
167 delayed()->nop();
169 fb( f_never, true, pc() + 4, relocInfo::none);
170 delayed()->nop();
171 fb( f_notEqual, false, lbl2 );
172 delayed()->nop();
174 fbp( f_notZero, true, fcc0, pn, pc() - 4, relocInfo::none);
175 delayed()->nop();
176 fbp( f_lessOrGreater, false, fcc1, pt, lbl3 );
177 delayed()->nop();
179 br( equal, true, pc() + 1024, relocInfo::none);
180 delayed()->nop();
181 br( lessEqual, false, lbl1 );
182 delayed()->nop();
183 br( never, false, lbl1 );
184 delayed()->nop();
186 bp( less, true, icc, pn, pc(), relocInfo::none);
187 delayed()->nop();
188 bp( lessEqualUnsigned, false, xcc, pt, lbl2 );
189 delayed()->nop();
191 call( pc(), relocInfo::none);
192 delayed()->nop();
193 call( lbl3 );
194 delayed()->nop();
197 casa( L6, L7, O0 );
198 casxa( O1, O2, O3, 0 );
200 udiv( O4, O5, O7 );
201 udiv( G0, (1 << 12) - 1, G1 );
202 sdiv( G1, G2, G3 );
203 sdiv( G4, -((1 << 12) - 1), G5 );
204 udivcc( G6, G7, I0 );
205 udivcc( I1, -((1 << 12) - 2), I2 );
206 sdivcc( I3, I4, I5 );
207 sdivcc( I6, -((1 << 12) - 0), I7 );
209 done();
210 retry();
212 fadd( FloatRegisterImpl::S, F0, F1, F2 );
213 fsub( FloatRegisterImpl::D, F34, F0, F62 );
215 fcmp( FloatRegisterImpl::Q, fcc0, F0, F60);
216 fcmpe( FloatRegisterImpl::S, fcc1, F31, F30);
218 ftox( FloatRegisterImpl::D, F2, F4 );
219 ftoi( FloatRegisterImpl::Q, F4, F8 );
221 ftof( FloatRegisterImpl::S, FloatRegisterImpl::Q, F3, F12 );
223 fxtof( FloatRegisterImpl::S, F4, F5 );
224 fitof( FloatRegisterImpl::D, F6, F8 );
226 fmov( FloatRegisterImpl::Q, F16, F20 );
227 fneg( FloatRegisterImpl::S, F6, F7 );
228 fabs( FloatRegisterImpl::D, F10, F12 );
230 fmul( FloatRegisterImpl::Q, F24, F28, F32 );
231 fmul( FloatRegisterImpl::S, FloatRegisterImpl::D, F8, F9, F14 );
232 fdiv( FloatRegisterImpl::S, F10, F11, F12 );
234 fsqrt( FloatRegisterImpl::S, F13, F14 );
236 flush( L0, L1 );
237 flush( L2, -1 );
239 flushw();
241 illtrap( (1 << 22) - 2);
243 impdep1( 17, (1 << 19) - 1 );
244 impdep2( 3, 0 );
246 jmpl( L3, L4, L5 );
247 delayed()->nop();
248 jmpl( L6, -1, L7, Relocation::spec_simple(relocInfo::none));
249 delayed()->nop();
252 ldf( FloatRegisterImpl::S, O0, O1, F15 );
253 ldf( FloatRegisterImpl::D, O2, -1, F14 );
256 ldfsr( O3, O4 );
257 ldfsr( O5, -1 );
258 ldxfsr( O6, O7 );
259 ldxfsr( I0, -1 );
261 ldfa( FloatRegisterImpl::D, I1, I2, 1, F16 );
262 ldfa( FloatRegisterImpl::Q, I3, -1, F36 );
264 ldsb( I4, I5, I6 );
265 ldsb( I7, -1, G0 );
266 ldsh( G1, G3, G4 );
267 ldsh( G5, -1, G6 );
268 ldsw( G7, L0, L1 );
269 ldsw( L2, -1, L3 );
270 ldub( L4, L5, L6 );
271 ldub( L7, -1, O0 );
272 lduh( O1, O2, O3 );
273 lduh( O4, -1, O5 );
274 lduw( O6, O7, G0 );
275 lduw( G1, -1, G2 );
276 ldx( G3, G4, G5 );
277 ldx( G6, -1, G7 );
278 ldd( I0, I1, I2 );
279 ldd( I3, -1, I4 );
281 ldsba( I5, I6, 2, I7 );
282 ldsba( L0, -1, L1 );
283 ldsha( L2, L3, 3, L4 );
284 ldsha( L5, -1, L6 );
285 ldswa( L7, O0, (1 << 8) - 1, O1 );
286 ldswa( O2, -1, O3 );
287 lduba( O4, O5, 0, O6 );
288 lduba( O7, -1, I0 );
289 lduha( I1, I2, 1, I3 );
290 lduha( I4, -1, I5 );
291 lduwa( I6, I7, 2, L0 );
292 lduwa( L1, -1, L2 );
293 ldxa( L3, L4, 3, L5 );
294 ldxa( L6, -1, L7 );
295 ldda( G0, G1, 4, G2 );
296 ldda( G3, -1, G4 );
298 ldstub( G5, G6, G7 );
299 ldstub( O0, -1, O1 );
301 ldstuba( O2, O3, 5, O4 );
302 ldstuba( O5, -1, O6 );
304 and3( I0, L0, O0 );
305 and3( G7, -1, O7 );
306 andcc( L2, I2, G2 );
307 andcc( L4, -1, G4 );
308 andn( I5, I6, I7 );
309 andn( I6, -1, I7 );
310 andncc( I5, I6, I7 );
311 andncc( I7, -1, I6 );
312 or3( I5, I6, I7 );
313 or3( I7, -1, I6 );
314 orcc( I5, I6, I7 );
315 orcc( I7, -1, I6 );
316 orn( I5, I6, I7 );
317 orn( I7, -1, I6 );
318 orncc( I5, I6, I7 );
319 orncc( I7, -1, I6 );
320 xor3( I5, I6, I7 );
321 xor3( I7, -1, I6 );
322 xorcc( I5, I6, I7 );
323 xorcc( I7, -1, I6 );
324 xnor( I5, I6, I7 );
325 xnor( I7, -1, I6 );
326 xnorcc( I5, I6, I7 );
327 xnorcc( I7, -1, I6 );
329 membar( Membar_mask_bits(StoreStore | LoadStore | StoreLoad | LoadLoad | Sync | MemIssue | Lookaside ) );
330 membar( StoreStore );
331 membar( LoadStore );
332 membar( StoreLoad );
333 membar( LoadLoad );
334 membar( Sync );
335 membar( MemIssue );
336 membar( Lookaside );
338 fmov( FloatRegisterImpl::S, f_ordered, true, fcc2, F16, F17 );
339 fmov( FloatRegisterImpl::D, rc_lz, L5, F18, F20 );
341 movcc( overflowClear, false, icc, I6, L4 );
342 movcc( f_unorderedOrEqual, true, fcc2, (1 << 10) - 1, O0 );
344 movr( rc_nz, I5, I6, I7 );
345 movr( rc_gz, L1, -1, L2 );
347 mulx( I5, I6, I7 );
348 mulx( I7, -1, I6 );
349 sdivx( I5, I6, I7 );
350 sdivx( I7, -1, I6 );
351 udivx( I5, I6, I7 );
352 udivx( I7, -1, I6 );
354 umul( I5, I6, I7 );
355 umul( I7, -1, I6 );
356 smul( I5, I6, I7 );
357 smul( I7, -1, I6 );
358 umulcc( I5, I6, I7 );
359 umulcc( I7, -1, I6 );
360 smulcc( I5, I6, I7 );
361 smulcc( I7, -1, I6 );
363 mulscc( I5, I6, I7 );
364 mulscc( I7, -1, I6 );
366 nop();
369 popc( G0, G1);
370 popc( -1, G2);
372 prefetch( L1, L2, severalReads );
373 prefetch( L3, -1, oneRead );
374 prefetcha( O3, O2, 6, severalWritesAndPossiblyReads );
375 prefetcha( G2, -1, oneWrite );
377 rett( I7, I7);
378 delayed()->nop();
379 rett( G0, -1, relocInfo::none);
380 delayed()->nop();
382 save( I5, I6, I7 );
383 save( I7, -1, I6 );
384 restore( I5, I6, I7 );
385 restore( I7, -1, I6 );
387 saved();
388 restored();
390 sethi( 0xaaaaaaaa, I3, Relocation::spec_simple(relocInfo::none));
392 sll( I5, I6, I7 );
393 sll( I7, 31, I6 );
394 srl( I5, I6, I7 );
395 srl( I7, 0, I6 );
396 sra( I5, I6, I7 );
397 sra( I7, 30, I6 );
398 sllx( I5, I6, I7 );
399 sllx( I7, 63, I6 );
400 srlx( I5, I6, I7 );
401 srlx( I7, 0, I6 );
402 srax( I5, I6, I7 );
403 srax( I7, 62, I6 );
405 sir( -1 );
407 stbar();
409 stf( FloatRegisterImpl::Q, F40, G0, I7 );
410 stf( FloatRegisterImpl::S, F18, I3, -1 );
412 stfsr( L1, L2 );
413 stfsr( I7, -1 );
414 stxfsr( I6, I5 );
415 stxfsr( L4, -1 );
417 stfa( FloatRegisterImpl::D, F22, I6, I7, 7 );
418 stfa( FloatRegisterImpl::Q, F44, G0, -1 );
420 stb( L5, O2, I7 );
421 stb( I7, I6, -1 );
422 sth( L5, O2, I7 );
423 sth( I7, I6, -1 );
424 stw( L5, O2, I7 );
425 stw( I7, I6, -1 );
426 stx( L5, O2, I7 );
427 stx( I7, I6, -1 );
428 std( L5, O2, I7 );
429 std( I7, I6, -1 );
431 stba( L5, O2, I7, 8 );
432 stba( I7, I6, -1 );
433 stha( L5, O2, I7, 9 );
434 stha( I7, I6, -1 );
435 stwa( L5, O2, I7, 0 );
436 stwa( I7, I6, -1 );
437 stxa( L5, O2, I7, 11 );
438 stxa( I7, I6, -1 );
439 stda( L5, O2, I7, 12 );
440 stda( I7, I6, -1 );
442 sub( I5, I6, I7 );
443 sub( I7, -1, I6 );
444 subcc( I5, I6, I7 );
445 subcc( I7, -1, I6 );
446 subc( I5, I6, I7 );
447 subc( I7, -1, I6 );
448 subccc( I5, I6, I7 );
449 subccc( I7, -1, I6 );
451 swap( I5, I6, I7 );
452 swap( I7, -1, I6 );
454 swapa( G0, G1, 13, G2 );
455 swapa( I7, -1, I6 );
457 taddcc( I5, I6, I7 );
458 taddcc( I7, -1, I6 );
459 taddcctv( I5, I6, I7 );
460 taddcctv( I7, -1, I6 );
462 tsubcc( I5, I6, I7 );
463 tsubcc( I7, -1, I6 );
464 tsubcctv( I5, I6, I7 );
465 tsubcctv( I7, -1, I6 );
467 trap( overflowClear, xcc, G0, G1 );
468 trap( lessEqual, icc, I7, 17 );
470 bind(lbl2);
471 bind(lbl3);
473 code()->decode();
474 }
476 // Generate a bunch 'o stuff unique to V8
477 void Assembler::test_v8_onlys() {
478 Label lbl1;
480 cb( cp_0or1or2, false, pc() - 4, relocInfo::none);
481 delayed()->nop();
482 cb( cp_never, true, lbl1);
483 delayed()->nop();
485 cpop1(1, 2, 3, 4);
486 cpop2(5, 6, 7, 8);
488 ldc( I0, I1, 31);
489 ldc( I2, -1, 0);
491 lddc( I4, I4, 30);
492 lddc( I6, 0, 1 );
494 ldcsr( L0, L1, 0);
495 ldcsr( L1, (1 << 12) - 1, 17 );
497 stc( 31, L4, L5);
498 stc( 30, L6, -(1 << 12) );
500 stdc( 0, L7, G0);
501 stdc( 1, G1, 0 );
503 stcsr( 16, G2, G3);
504 stcsr( 17, G4, 1 );
506 stdcq( 4, G5, G6);
507 stdcq( 5, G7, -1 );
509 bind(lbl1);
511 code()->decode();
512 }
513 #endif
515 // Implementation of MacroAssembler
517 void MacroAssembler::null_check(Register reg, int offset) {
518 if (needs_explicit_null_check((intptr_t)offset)) {
519 // provoke OS NULL exception if reg = NULL by
520 // accessing M[reg] w/o changing any registers
521 ld_ptr(reg, 0, G0);
522 }
523 else {
524 // nothing to do, (later) access of M[reg + offset]
525 // will provoke OS NULL exception if reg = NULL
526 }
527 }
529 // Ring buffer jumps
531 #ifndef PRODUCT
532 void MacroAssembler::ret( bool trace ) { if (trace) {
533 mov(I7, O7); // traceable register
534 JMP(O7, 2 * BytesPerInstWord);
535 } else {
536 jmpl( I7, 2 * BytesPerInstWord, G0 );
537 }
538 }
540 void MacroAssembler::retl( bool trace ) { if (trace) JMP(O7, 2 * BytesPerInstWord);
541 else jmpl( O7, 2 * BytesPerInstWord, G0 ); }
542 #endif /* PRODUCT */
545 void MacroAssembler::jmp2(Register r1, Register r2, const char* file, int line ) {
546 assert_not_delayed();
547 // This can only be traceable if r1 & r2 are visible after a window save
548 if (TraceJumps) {
549 #ifndef PRODUCT
550 save_frame(0);
551 verify_thread();
552 ld(G2_thread, in_bytes(JavaThread::jmp_ring_index_offset()), O0);
553 add(G2_thread, in_bytes(JavaThread::jmp_ring_offset()), O1);
554 sll(O0, exact_log2(4*sizeof(intptr_t)), O2);
555 add(O2, O1, O1);
557 add(r1->after_save(), r2->after_save(), O2);
558 set((intptr_t)file, O3);
559 set(line, O4);
560 Label L;
561 // get nearby pc, store jmp target
562 call(L, relocInfo::none); // No relocation for call to pc+0x8
563 delayed()->st(O2, O1, 0);
564 bind(L);
566 // store nearby pc
567 st(O7, O1, sizeof(intptr_t));
568 // store file
569 st(O3, O1, 2*sizeof(intptr_t));
570 // store line
571 st(O4, O1, 3*sizeof(intptr_t));
572 add(O0, 1, O0);
573 and3(O0, JavaThread::jump_ring_buffer_size - 1, O0);
574 st(O0, G2_thread, in_bytes(JavaThread::jmp_ring_index_offset()));
575 restore();
576 #endif /* PRODUCT */
577 }
578 jmpl(r1, r2, G0);
579 }
580 void MacroAssembler::jmp(Register r1, int offset, const char* file, int line ) {
581 assert_not_delayed();
582 // This can only be traceable if r1 is visible after a window save
583 if (TraceJumps) {
584 #ifndef PRODUCT
585 save_frame(0);
586 verify_thread();
587 ld(G2_thread, in_bytes(JavaThread::jmp_ring_index_offset()), O0);
588 add(G2_thread, in_bytes(JavaThread::jmp_ring_offset()), O1);
589 sll(O0, exact_log2(4*sizeof(intptr_t)), O2);
590 add(O2, O1, O1);
592 add(r1->after_save(), offset, O2);
593 set((intptr_t)file, O3);
594 set(line, O4);
595 Label L;
596 // get nearby pc, store jmp target
597 call(L, relocInfo::none); // No relocation for call to pc+0x8
598 delayed()->st(O2, O1, 0);
599 bind(L);
601 // store nearby pc
602 st(O7, O1, sizeof(intptr_t));
603 // store file
604 st(O3, O1, 2*sizeof(intptr_t));
605 // store line
606 st(O4, O1, 3*sizeof(intptr_t));
607 add(O0, 1, O0);
608 and3(O0, JavaThread::jump_ring_buffer_size - 1, O0);
609 st(O0, G2_thread, in_bytes(JavaThread::jmp_ring_index_offset()));
610 restore();
611 #endif /* PRODUCT */
612 }
613 jmp(r1, offset);
614 }
616 // This code sequence is relocatable to any address, even on LP64.
617 void MacroAssembler::jumpl( Address& a, Register d, int offset, const char* file, int line ) {
618 assert_not_delayed();
619 // Force fixed length sethi because NativeJump and NativeFarCall don't handle
620 // variable length instruction streams.
621 sethi(a, /*ForceRelocatable=*/ true);
622 if (TraceJumps) {
623 #ifndef PRODUCT
624 // Must do the add here so relocation can find the remainder of the
625 // value to be relocated.
626 add(a.base(), a.disp() + offset, a.base(), a.rspec(offset));
627 save_frame(0);
628 verify_thread();
629 ld(G2_thread, in_bytes(JavaThread::jmp_ring_index_offset()), O0);
630 add(G2_thread, in_bytes(JavaThread::jmp_ring_offset()), O1);
631 sll(O0, exact_log2(4*sizeof(intptr_t)), O2);
632 add(O2, O1, O1);
634 set((intptr_t)file, O3);
635 set(line, O4);
636 Label L;
638 // get nearby pc, store jmp target
639 call(L, relocInfo::none); // No relocation for call to pc+0x8
640 delayed()->st(a.base()->after_save(), O1, 0);
641 bind(L);
643 // store nearby pc
644 st(O7, O1, sizeof(intptr_t));
645 // store file
646 st(O3, O1, 2*sizeof(intptr_t));
647 // store line
648 st(O4, O1, 3*sizeof(intptr_t));
649 add(O0, 1, O0);
650 and3(O0, JavaThread::jump_ring_buffer_size - 1, O0);
651 st(O0, G2_thread, in_bytes(JavaThread::jmp_ring_index_offset()));
652 restore();
653 jmpl(a.base(), G0, d);
654 #else
655 jmpl(a, d, offset);
656 #endif /* PRODUCT */
657 } else {
658 jmpl(a, d, offset);
659 }
660 }
662 void MacroAssembler::jump( Address& a, int offset, const char* file, int line ) {
663 jumpl( a, G0, offset, file, line );
664 }
667 // Convert to C varargs format
668 void MacroAssembler::set_varargs( Argument inArg, Register d ) {
669 // spill register-resident args to their memory slots
670 // (SPARC calling convention requires callers to have already preallocated these)
671 // Note that the inArg might in fact be an outgoing argument,
672 // if a leaf routine or stub does some tricky argument shuffling.
673 // This routine must work even though one of the saved arguments
674 // is in the d register (e.g., set_varargs(Argument(0, false), O0)).
675 for (Argument savePtr = inArg;
676 savePtr.is_register();
677 savePtr = savePtr.successor()) {
678 st_ptr(savePtr.as_register(), savePtr.address_in_frame());
679 }
680 // return the address of the first memory slot
681 add(inArg.address_in_frame(), d);
682 }
684 // Conditional breakpoint (for assertion checks in assembly code)
685 void MacroAssembler::breakpoint_trap(Condition c, CC cc) {
686 trap(c, cc, G0, ST_RESERVED_FOR_USER_0);
687 }
689 // We want to use ST_BREAKPOINT here, but the debugger is confused by it.
690 void MacroAssembler::breakpoint_trap() {
691 trap(ST_RESERVED_FOR_USER_0);
692 }
694 // flush windows (except current) using flushw instruction if avail.
695 void MacroAssembler::flush_windows() {
696 if (VM_Version::v9_instructions_work()) flushw();
697 else flush_windows_trap();
698 }
700 // Write serialization page so VM thread can do a pseudo remote membar
701 // We use the current thread pointer to calculate a thread specific
702 // offset to write to within the page. This minimizes bus traffic
703 // due to cache line collision.
704 void MacroAssembler::serialize_memory(Register thread, Register tmp1, Register tmp2) {
705 Address mem_serialize_page(tmp1, os::get_memory_serialize_page());
706 srl(thread, os::get_serialize_page_shift_count(), tmp2);
707 if (Assembler::is_simm13(os::vm_page_size())) {
708 and3(tmp2, (os::vm_page_size() - sizeof(int)), tmp2);
709 }
710 else {
711 set((os::vm_page_size() - sizeof(int)), tmp1);
712 and3(tmp2, tmp1, tmp2);
713 }
714 load_address(mem_serialize_page);
715 st(G0, tmp1, tmp2);
716 }
720 void MacroAssembler::enter() {
721 Unimplemented();
722 }
724 void MacroAssembler::leave() {
725 Unimplemented();
726 }
728 void MacroAssembler::mult(Register s1, Register s2, Register d) {
729 if(VM_Version::v9_instructions_work()) {
730 mulx (s1, s2, d);
731 } else {
732 smul (s1, s2, d);
733 }
734 }
736 void MacroAssembler::mult(Register s1, int simm13a, Register d) {
737 if(VM_Version::v9_instructions_work()) {
738 mulx (s1, simm13a, d);
739 } else {
740 smul (s1, simm13a, d);
741 }
742 }
745 #ifdef ASSERT
746 void MacroAssembler::read_ccr_v8_assert(Register ccr_save) {
747 const Register s1 = G3_scratch;
748 const Register s2 = G4_scratch;
749 Label get_psr_test;
750 // Get the condition codes the V8 way.
751 read_ccr_trap(s1);
752 mov(ccr_save, s2);
753 // This is a test of V8 which has icc but not xcc
754 // so mask off the xcc bits
755 and3(s2, 0xf, s2);
756 // Compare condition codes from the V8 and V9 ways.
757 subcc(s2, s1, G0);
758 br(Assembler::notEqual, true, Assembler::pt, get_psr_test);
759 delayed()->breakpoint_trap();
760 bind(get_psr_test);
761 }
763 void MacroAssembler::write_ccr_v8_assert(Register ccr_save) {
764 const Register s1 = G3_scratch;
765 const Register s2 = G4_scratch;
766 Label set_psr_test;
767 // Write out the saved condition codes the V8 way
768 write_ccr_trap(ccr_save, s1, s2);
769 // Read back the condition codes using the V9 instruction
770 rdccr(s1);
771 mov(ccr_save, s2);
772 // This is a test of V8 which has icc but not xcc
773 // so mask off the xcc bits
774 and3(s2, 0xf, s2);
775 and3(s1, 0xf, s1);
776 // Compare the V8 way with the V9 way.
777 subcc(s2, s1, G0);
778 br(Assembler::notEqual, true, Assembler::pt, set_psr_test);
779 delayed()->breakpoint_trap();
780 bind(set_psr_test);
781 }
782 #else
783 #define read_ccr_v8_assert(x)
784 #define write_ccr_v8_assert(x)
785 #endif // ASSERT
787 void MacroAssembler::read_ccr(Register ccr_save) {
788 if (VM_Version::v9_instructions_work()) {
789 rdccr(ccr_save);
790 // Test code sequence used on V8. Do not move above rdccr.
791 read_ccr_v8_assert(ccr_save);
792 } else {
793 read_ccr_trap(ccr_save);
794 }
795 }
797 void MacroAssembler::write_ccr(Register ccr_save) {
798 if (VM_Version::v9_instructions_work()) {
799 // Test code sequence used on V8. Do not move below wrccr.
800 write_ccr_v8_assert(ccr_save);
801 wrccr(ccr_save);
802 } else {
803 const Register temp_reg1 = G3_scratch;
804 const Register temp_reg2 = G4_scratch;
805 write_ccr_trap(ccr_save, temp_reg1, temp_reg2);
806 }
807 }
810 // Calls to C land
812 #ifdef ASSERT
813 // a hook for debugging
814 static Thread* reinitialize_thread() {
815 return ThreadLocalStorage::thread();
816 }
817 #else
818 #define reinitialize_thread ThreadLocalStorage::thread
819 #endif
821 #ifdef ASSERT
822 address last_get_thread = NULL;
823 #endif
825 // call this when G2_thread is not known to be valid
826 void MacroAssembler::get_thread() {
827 save_frame(0); // to avoid clobbering O0
828 mov(G1, L0); // avoid clobbering G1
829 mov(G5_method, L1); // avoid clobbering G5
830 mov(G3, L2); // avoid clobbering G3 also
831 mov(G4, L5); // avoid clobbering G4
832 #ifdef ASSERT
833 Address last_get_thread_addr(L3, (address)&last_get_thread);
834 sethi(last_get_thread_addr);
835 inc(L4, get_pc(L4) + 2 * BytesPerInstWord); // skip getpc() code + inc + st_ptr to point L4 at call
836 st_ptr(L4, last_get_thread_addr);
837 #endif
838 call(CAST_FROM_FN_PTR(address, reinitialize_thread), relocInfo::runtime_call_type);
839 delayed()->nop();
840 mov(L0, G1);
841 mov(L1, G5_method);
842 mov(L2, G3);
843 mov(L5, G4);
844 restore(O0, 0, G2_thread);
845 }
847 static Thread* verify_thread_subroutine(Thread* gthread_value) {
848 Thread* correct_value = ThreadLocalStorage::thread();
849 guarantee(gthread_value == correct_value, "G2_thread value must be the thread");
850 return correct_value;
851 }
853 void MacroAssembler::verify_thread() {
854 if (VerifyThread) {
855 // NOTE: this chops off the heads of the 64-bit O registers.
856 #ifdef CC_INTERP
857 save_frame(0);
858 #else
859 // make sure G2_thread contains the right value
860 save_frame_and_mov(0, Lmethod, Lmethod); // to avoid clobbering O0 (and propagate Lmethod for -Xprof)
861 mov(G1, L1); // avoid clobbering G1
862 // G2 saved below
863 mov(G3, L3); // avoid clobbering G3
864 mov(G4, L4); // avoid clobbering G4
865 mov(G5_method, L5); // avoid clobbering G5_method
866 #endif /* CC_INTERP */
867 #if defined(COMPILER2) && !defined(_LP64)
868 // Save & restore possible 64-bit Long arguments in G-regs
869 srlx(G1,32,L0);
870 srlx(G4,32,L6);
871 #endif
872 call(CAST_FROM_FN_PTR(address,verify_thread_subroutine), relocInfo::runtime_call_type);
873 delayed()->mov(G2_thread, O0);
875 mov(L1, G1); // Restore G1
876 // G2 restored below
877 mov(L3, G3); // restore G3
878 mov(L4, G4); // restore G4
879 mov(L5, G5_method); // restore G5_method
880 #if defined(COMPILER2) && !defined(_LP64)
881 // Save & restore possible 64-bit Long arguments in G-regs
882 sllx(L0,32,G2); // Move old high G1 bits high in G2
883 sllx(G1, 0,G1); // Clear current high G1 bits
884 or3 (G1,G2,G1); // Recover 64-bit G1
885 sllx(L6,32,G2); // Move old high G4 bits high in G2
886 sllx(G4, 0,G4); // Clear current high G4 bits
887 or3 (G4,G2,G4); // Recover 64-bit G4
888 #endif
889 restore(O0, 0, G2_thread);
890 }
891 }
894 void MacroAssembler::save_thread(const Register thread_cache) {
895 verify_thread();
896 if (thread_cache->is_valid()) {
897 assert(thread_cache->is_local() || thread_cache->is_in(), "bad volatile");
898 mov(G2_thread, thread_cache);
899 }
900 if (VerifyThread) {
901 // smash G2_thread, as if the VM were about to anyway
902 set(0x67676767, G2_thread);
903 }
904 }
907 void MacroAssembler::restore_thread(const Register thread_cache) {
908 if (thread_cache->is_valid()) {
909 assert(thread_cache->is_local() || thread_cache->is_in(), "bad volatile");
910 mov(thread_cache, G2_thread);
911 verify_thread();
912 } else {
913 // do it the slow way
914 get_thread();
915 }
916 }
919 // %%% maybe get rid of [re]set_last_Java_frame
920 void MacroAssembler::set_last_Java_frame(Register last_java_sp, Register last_Java_pc) {
921 assert_not_delayed();
922 Address flags(G2_thread,
923 0,
924 in_bytes(JavaThread::frame_anchor_offset()) +
925 in_bytes(JavaFrameAnchor::flags_offset()));
926 Address pc_addr(G2_thread,
927 0,
928 in_bytes(JavaThread::last_Java_pc_offset()));
930 // Always set last_Java_pc and flags first because once last_Java_sp is visible
931 // has_last_Java_frame is true and users will look at the rest of the fields.
932 // (Note: flags should always be zero before we get here so doesn't need to be set.)
934 #ifdef ASSERT
935 // Verify that flags was zeroed on return to Java
936 Label PcOk;
937 save_frame(0); // to avoid clobbering O0
938 ld_ptr(pc_addr, L0);
939 tst(L0);
940 #ifdef _LP64
941 brx(Assembler::zero, false, Assembler::pt, PcOk);
942 #else
943 br(Assembler::zero, false, Assembler::pt, PcOk);
944 #endif // _LP64
945 delayed() -> nop();
946 stop("last_Java_pc not zeroed before leaving Java");
947 bind(PcOk);
949 // Verify that flags was zeroed on return to Java
950 Label FlagsOk;
951 ld(flags, L0);
952 tst(L0);
953 br(Assembler::zero, false, Assembler::pt, FlagsOk);
954 delayed() -> restore();
955 stop("flags not zeroed before leaving Java");
956 bind(FlagsOk);
957 #endif /* ASSERT */
958 //
959 // When returning from calling out from Java mode the frame anchor's last_Java_pc
960 // will always be set to NULL. It is set here so that if we are doing a call to
961 // native (not VM) that we capture the known pc and don't have to rely on the
962 // native call having a standard frame linkage where we can find the pc.
964 if (last_Java_pc->is_valid()) {
965 st_ptr(last_Java_pc, pc_addr);
966 }
968 #ifdef _LP64
969 #ifdef ASSERT
970 // Make sure that we have an odd stack
971 Label StackOk;
972 andcc(last_java_sp, 0x01, G0);
973 br(Assembler::notZero, false, Assembler::pt, StackOk);
974 delayed() -> nop();
975 stop("Stack Not Biased in set_last_Java_frame");
976 bind(StackOk);
977 #endif // ASSERT
978 assert( last_java_sp != G4_scratch, "bad register usage in set_last_Java_frame");
979 add( last_java_sp, STACK_BIAS, G4_scratch );
980 st_ptr(G4_scratch, Address(G2_thread, 0, in_bytes(JavaThread::last_Java_sp_offset())));
981 #else
982 st_ptr(last_java_sp, Address(G2_thread, 0, in_bytes(JavaThread::last_Java_sp_offset())));
983 #endif // _LP64
984 }
986 void MacroAssembler::reset_last_Java_frame(void) {
987 assert_not_delayed();
989 Address sp_addr(G2_thread, 0, in_bytes(JavaThread::last_Java_sp_offset()));
990 Address pc_addr(G2_thread,
991 0,
992 in_bytes(JavaThread::frame_anchor_offset()) + in_bytes(JavaFrameAnchor::last_Java_pc_offset()));
993 Address flags(G2_thread,
994 0,
995 in_bytes(JavaThread::frame_anchor_offset()) + in_bytes(JavaFrameAnchor::flags_offset()));
997 #ifdef ASSERT
998 // check that it WAS previously set
999 #ifdef CC_INTERP
1000 save_frame(0);
1001 #else
1002 save_frame_and_mov(0, Lmethod, Lmethod); // Propagate Lmethod to helper frame for -Xprof
1003 #endif /* CC_INTERP */
1004 ld_ptr(sp_addr, L0);
1005 tst(L0);
1006 breakpoint_trap(Assembler::zero, Assembler::ptr_cc);
1007 restore();
1008 #endif // ASSERT
1010 st_ptr(G0, sp_addr);
1011 // Always return last_Java_pc to zero
1012 st_ptr(G0, pc_addr);
1013 // Always null flags after return to Java
1014 st(G0, flags);
1015 }
1018 void MacroAssembler::call_VM_base(
1019 Register oop_result,
1020 Register thread_cache,
1021 Register last_java_sp,
1022 address entry_point,
1023 int number_of_arguments,
1024 bool check_exceptions)
1025 {
1026 assert_not_delayed();
1028 // determine last_java_sp register
1029 if (!last_java_sp->is_valid()) {
1030 last_java_sp = SP;
1031 }
1032 // debugging support
1033 assert(number_of_arguments >= 0 , "cannot have negative number of arguments");
1035 // 64-bit last_java_sp is biased!
1036 set_last_Java_frame(last_java_sp, noreg);
1037 if (VerifyThread) mov(G2_thread, O0); // about to be smashed; pass early
1038 save_thread(thread_cache);
1039 // do the call
1040 call(entry_point, relocInfo::runtime_call_type);
1041 if (!VerifyThread)
1042 delayed()->mov(G2_thread, O0); // pass thread as first argument
1043 else
1044 delayed()->nop(); // (thread already passed)
1045 restore_thread(thread_cache);
1046 reset_last_Java_frame();
1048 // check for pending exceptions. use Gtemp as scratch register.
1049 if (check_exceptions) {
1050 check_and_forward_exception(Gtemp);
1051 }
1053 // get oop result if there is one and reset the value in the thread
1054 if (oop_result->is_valid()) {
1055 get_vm_result(oop_result);
1056 }
1057 }
1059 void MacroAssembler::check_and_forward_exception(Register scratch_reg)
1060 {
1061 Label L;
1063 check_and_handle_popframe(scratch_reg);
1064 check_and_handle_earlyret(scratch_reg);
1066 Address exception_addr(G2_thread, 0, in_bytes(Thread::pending_exception_offset()));
1067 ld_ptr(exception_addr, scratch_reg);
1068 br_null(scratch_reg,false,pt,L);
1069 delayed()->nop();
1070 // we use O7 linkage so that forward_exception_entry has the issuing PC
1071 call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type);
1072 delayed()->nop();
1073 bind(L);
1074 }
1077 void MacroAssembler::check_and_handle_popframe(Register scratch_reg) {
1078 }
1081 void MacroAssembler::check_and_handle_earlyret(Register scratch_reg) {
1082 }
1085 void MacroAssembler::call_VM(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions) {
1086 call_VM_base(oop_result, noreg, noreg, entry_point, number_of_arguments, check_exceptions);
1087 }
1090 void MacroAssembler::call_VM(Register oop_result, address entry_point, Register arg_1, bool check_exceptions) {
1091 // O0 is reserved for the thread
1092 mov(arg_1, O1);
1093 call_VM(oop_result, entry_point, 1, check_exceptions);
1094 }
1097 void MacroAssembler::call_VM(Register oop_result, address entry_point, Register arg_1, Register arg_2, bool check_exceptions) {
1098 // O0 is reserved for the thread
1099 mov(arg_1, O1);
1100 mov(arg_2, O2); assert(arg_2 != O1, "smashed argument");
1101 call_VM(oop_result, entry_point, 2, check_exceptions);
1102 }
1105 void MacroAssembler::call_VM(Register oop_result, address entry_point, Register arg_1, Register arg_2, Register arg_3, bool check_exceptions) {
1106 // O0 is reserved for the thread
1107 mov(arg_1, O1);
1108 mov(arg_2, O2); assert(arg_2 != O1, "smashed argument");
1109 mov(arg_3, O3); assert(arg_3 != O1 && arg_3 != O2, "smashed argument");
1110 call_VM(oop_result, entry_point, 3, check_exceptions);
1111 }
1115 // Note: The following call_VM overloadings are useful when a "save"
1116 // has already been performed by a stub, and the last Java frame is
1117 // the previous one. In that case, last_java_sp must be passed as FP
1118 // instead of SP.
1121 void MacroAssembler::call_VM(Register oop_result, Register last_java_sp, address entry_point, int number_of_arguments, bool check_exceptions) {
1122 call_VM_base(oop_result, noreg, last_java_sp, entry_point, number_of_arguments, check_exceptions);
1123 }
1126 void MacroAssembler::call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, bool check_exceptions) {
1127 // O0 is reserved for the thread
1128 mov(arg_1, O1);
1129 call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions);
1130 }
1133 void MacroAssembler::call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, Register arg_2, bool check_exceptions) {
1134 // O0 is reserved for the thread
1135 mov(arg_1, O1);
1136 mov(arg_2, O2); assert(arg_2 != O1, "smashed argument");
1137 call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions);
1138 }
1141 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) {
1142 // O0 is reserved for the thread
1143 mov(arg_1, O1);
1144 mov(arg_2, O2); assert(arg_2 != O1, "smashed argument");
1145 mov(arg_3, O3); assert(arg_3 != O1 && arg_3 != O2, "smashed argument");
1146 call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions);
1147 }
1151 void MacroAssembler::call_VM_leaf_base(Register thread_cache, address entry_point, int number_of_arguments) {
1152 assert_not_delayed();
1153 save_thread(thread_cache);
1154 // do the call
1155 call(entry_point, relocInfo::runtime_call_type);
1156 delayed()->nop();
1157 restore_thread(thread_cache);
1158 }
1161 void MacroAssembler::call_VM_leaf(Register thread_cache, address entry_point, int number_of_arguments) {
1162 call_VM_leaf_base(thread_cache, entry_point, number_of_arguments);
1163 }
1166 void MacroAssembler::call_VM_leaf(Register thread_cache, address entry_point, Register arg_1) {
1167 mov(arg_1, O0);
1168 call_VM_leaf(thread_cache, entry_point, 1);
1169 }
1172 void MacroAssembler::call_VM_leaf(Register thread_cache, address entry_point, Register arg_1, Register arg_2) {
1173 mov(arg_1, O0);
1174 mov(arg_2, O1); assert(arg_2 != O0, "smashed argument");
1175 call_VM_leaf(thread_cache, entry_point, 2);
1176 }
1179 void MacroAssembler::call_VM_leaf(Register thread_cache, address entry_point, Register arg_1, Register arg_2, Register arg_3) {
1180 mov(arg_1, O0);
1181 mov(arg_2, O1); assert(arg_2 != O0, "smashed argument");
1182 mov(arg_3, O2); assert(arg_3 != O0 && arg_3 != O1, "smashed argument");
1183 call_VM_leaf(thread_cache, entry_point, 3);
1184 }
1187 void MacroAssembler::get_vm_result(Register oop_result) {
1188 verify_thread();
1189 Address vm_result_addr(G2_thread, 0, in_bytes(JavaThread::vm_result_offset()));
1190 ld_ptr( vm_result_addr, oop_result);
1191 st_ptr(G0, vm_result_addr);
1192 verify_oop(oop_result);
1193 }
1196 void MacroAssembler::get_vm_result_2(Register oop_result) {
1197 verify_thread();
1198 Address vm_result_addr_2(G2_thread, 0, in_bytes(JavaThread::vm_result_2_offset()));
1199 ld_ptr(vm_result_addr_2, oop_result);
1200 st_ptr(G0, vm_result_addr_2);
1201 verify_oop(oop_result);
1202 }
1205 // We require that C code which does not return a value in vm_result will
1206 // leave it undisturbed.
1207 void MacroAssembler::set_vm_result(Register oop_result) {
1208 verify_thread();
1209 Address vm_result_addr(G2_thread, 0, in_bytes(JavaThread::vm_result_offset()));
1210 verify_oop(oop_result);
1212 # ifdef ASSERT
1213 // Check that we are not overwriting any other oop.
1214 #ifdef CC_INTERP
1215 save_frame(0);
1216 #else
1217 save_frame_and_mov(0, Lmethod, Lmethod); // Propagate Lmethod for -Xprof
1218 #endif /* CC_INTERP */
1219 ld_ptr(vm_result_addr, L0);
1220 tst(L0);
1221 restore();
1222 breakpoint_trap(notZero, Assembler::ptr_cc);
1223 // }
1224 # endif
1226 st_ptr(oop_result, vm_result_addr);
1227 }
1230 void MacroAssembler::card_table_write(jbyte* byte_map_base,
1231 Register tmp, Register obj) {
1232 #ifdef _LP64
1233 srlx(obj, CardTableModRefBS::card_shift, obj);
1234 #else
1235 srl(obj, CardTableModRefBS::card_shift, obj);
1236 #endif
1237 assert( tmp != obj, "need separate temp reg");
1238 Address rs(tmp, (address)byte_map_base);
1239 load_address(rs);
1240 stb(G0, rs.base(), obj);
1241 }
1243 // %%% Note: The following six instructions have been moved,
1244 // unchanged, from assembler_sparc.inline.hpp.
1245 // They will be refactored at a later date.
1247 void MacroAssembler::sethi(intptr_t imm22a,
1248 Register d,
1249 bool ForceRelocatable,
1250 RelocationHolder const& rspec) {
1251 Address adr( d, (address)imm22a, rspec );
1252 MacroAssembler::sethi( adr, ForceRelocatable );
1253 }
1256 void MacroAssembler::sethi(Address& a, bool ForceRelocatable) {
1257 address save_pc;
1258 int shiftcnt;
1259 // if addr of local, do not need to load it
1260 assert(a.base() != FP && a.base() != SP, "just use ld or st for locals");
1261 #ifdef _LP64
1262 # ifdef CHECK_DELAY
1263 assert_not_delayed( (char *)"cannot put two instructions in delay slot" );
1264 # endif
1265 v9_dep();
1266 // ForceRelocatable = 1;
1267 save_pc = pc();
1268 if (a.hi32() == 0 && a.low32() >= 0) {
1269 Assembler::sethi(a.low32(), a.base(), a.rspec());
1270 }
1271 else if (a.hi32() == -1) {
1272 Assembler::sethi(~a.low32(), a.base(), a.rspec());
1273 xor3(a.base(), ~low10(~0), a.base());
1274 }
1275 else {
1276 Assembler::sethi(a.hi32(), a.base(), a.rspec() ); // 22
1277 if ( a.hi32() & 0x3ff ) // Any bits?
1278 or3( a.base(), a.hi32() & 0x3ff ,a.base() ); // High 32 bits are now in low 32
1279 if ( a.low32() & 0xFFFFFC00 ) { // done?
1280 if( (a.low32() >> 20) & 0xfff ) { // Any bits set?
1281 sllx(a.base(), 12, a.base()); // Make room for next 12 bits
1282 or3( a.base(), (a.low32() >> 20) & 0xfff,a.base() ); // Or in next 12
1283 shiftcnt = 0; // We already shifted
1284 }
1285 else
1286 shiftcnt = 12;
1287 if( (a.low32() >> 10) & 0x3ff ) {
1288 sllx(a.base(), shiftcnt+10, a.base());// Make room for last 10 bits
1289 or3( a.base(), (a.low32() >> 10) & 0x3ff,a.base() ); // Or in next 10
1290 shiftcnt = 0;
1291 }
1292 else
1293 shiftcnt = 10;
1294 sllx(a.base(), shiftcnt+10 , a.base()); // Shift leaving disp field 0'd
1295 }
1296 else
1297 sllx( a.base(), 32, a.base() );
1298 }
1299 // Pad out the instruction sequence so it can be
1300 // patched later.
1301 if ( ForceRelocatable || (a.rtype() != relocInfo::none &&
1302 a.rtype() != relocInfo::runtime_call_type) ) {
1303 while ( pc() < (save_pc + (7 * BytesPerInstWord )) )
1304 nop();
1305 }
1306 #else
1307 Assembler::sethi(a.hi(), a.base(), a.rspec());
1308 #endif
1310 }
1312 int MacroAssembler::size_of_sethi(address a, bool worst_case) {
1313 #ifdef _LP64
1314 if (worst_case) return 7;
1315 intptr_t iaddr = (intptr_t)a;
1316 int hi32 = (int)(iaddr >> 32);
1317 int lo32 = (int)(iaddr);
1318 int inst_count;
1319 if (hi32 == 0 && lo32 >= 0)
1320 inst_count = 1;
1321 else if (hi32 == -1)
1322 inst_count = 2;
1323 else {
1324 inst_count = 2;
1325 if ( hi32 & 0x3ff )
1326 inst_count++;
1327 if ( lo32 & 0xFFFFFC00 ) {
1328 if( (lo32 >> 20) & 0xfff ) inst_count += 2;
1329 if( (lo32 >> 10) & 0x3ff ) inst_count += 2;
1330 }
1331 }
1332 return BytesPerInstWord * inst_count;
1333 #else
1334 return BytesPerInstWord;
1335 #endif
1336 }
1338 int MacroAssembler::worst_case_size_of_set() {
1339 return size_of_sethi(NULL, true) + 1;
1340 }
1342 void MacroAssembler::set(intptr_t value, Register d,
1343 RelocationHolder const& rspec) {
1344 Address val( d, (address)value, rspec);
1346 if ( rspec.type() == relocInfo::none ) {
1347 // can optimize
1348 if (-4096 <= value && value <= 4095) {
1349 or3(G0, value, d); // setsw (this leaves upper 32 bits sign-extended)
1350 return;
1351 }
1352 if (inv_hi22(hi22(value)) == value) {
1353 sethi(val);
1354 return;
1355 }
1356 }
1357 assert_not_delayed( (char *)"cannot put two instructions in delay slot" );
1358 sethi( val );
1359 if (rspec.type() != relocInfo::none || (value & 0x3ff) != 0) {
1360 add( d, value & 0x3ff, d, rspec);
1361 }
1362 }
1364 void MacroAssembler::setsw(int value, Register d,
1365 RelocationHolder const& rspec) {
1366 Address val( d, (address)value, rspec);
1367 if ( rspec.type() == relocInfo::none ) {
1368 // can optimize
1369 if (-4096 <= value && value <= 4095) {
1370 or3(G0, value, d);
1371 return;
1372 }
1373 if (inv_hi22(hi22(value)) == value) {
1374 sethi( val );
1375 #ifndef _LP64
1376 if ( value < 0 ) {
1377 assert_not_delayed();
1378 sra (d, G0, d);
1379 }
1380 #endif
1381 return;
1382 }
1383 }
1384 assert_not_delayed();
1385 sethi( val );
1386 add( d, value & 0x3ff, d, rspec);
1388 // (A negative value could be loaded in 2 insns with sethi/xor,
1389 // but it would take a more complex relocation.)
1390 #ifndef _LP64
1391 if ( value < 0)
1392 sra(d, G0, d);
1393 #endif
1394 }
1396 // %%% End of moved six set instructions.
1399 void MacroAssembler::set64(jlong value, Register d, Register tmp) {
1400 assert_not_delayed();
1401 v9_dep();
1403 int hi = (int)(value >> 32);
1404 int lo = (int)(value & ~0);
1405 // (Matcher::isSimpleConstant64 knows about the following optimizations.)
1406 if (Assembler::is_simm13(lo) && value == lo) {
1407 or3(G0, lo, d);
1408 } else if (hi == 0) {
1409 Assembler::sethi(lo, d); // hardware version zero-extends to upper 32
1410 if (low10(lo) != 0)
1411 or3(d, low10(lo), d);
1412 }
1413 else if (hi == -1) {
1414 Assembler::sethi(~lo, d); // hardware version zero-extends to upper 32
1415 xor3(d, low10(lo) ^ ~low10(~0), d);
1416 }
1417 else if (lo == 0) {
1418 if (Assembler::is_simm13(hi)) {
1419 or3(G0, hi, d);
1420 } else {
1421 Assembler::sethi(hi, d); // hardware version zero-extends to upper 32
1422 if (low10(hi) != 0)
1423 or3(d, low10(hi), d);
1424 }
1425 sllx(d, 32, d);
1426 }
1427 else {
1428 Assembler::sethi(hi, tmp);
1429 Assembler::sethi(lo, d); // macro assembler version sign-extends
1430 if (low10(hi) != 0)
1431 or3 (tmp, low10(hi), tmp);
1432 if (low10(lo) != 0)
1433 or3 ( d, low10(lo), d);
1434 sllx(tmp, 32, tmp);
1435 or3 (d, tmp, d);
1436 }
1437 }
1439 // compute size in bytes of sparc frame, given
1440 // number of extraWords
1441 int MacroAssembler::total_frame_size_in_bytes(int extraWords) {
1443 int nWords = frame::memory_parameter_word_sp_offset;
1445 nWords += extraWords;
1447 if (nWords & 1) ++nWords; // round up to double-word
1449 return nWords * BytesPerWord;
1450 }
1453 // save_frame: given number of "extra" words in frame,
1454 // issue approp. save instruction (p 200, v8 manual)
1456 void MacroAssembler::save_frame(int extraWords = 0) {
1457 int delta = -total_frame_size_in_bytes(extraWords);
1458 if (is_simm13(delta)) {
1459 save(SP, delta, SP);
1460 } else {
1461 set(delta, G3_scratch);
1462 save(SP, G3_scratch, SP);
1463 }
1464 }
1467 void MacroAssembler::save_frame_c1(int size_in_bytes) {
1468 if (is_simm13(-size_in_bytes)) {
1469 save(SP, -size_in_bytes, SP);
1470 } else {
1471 set(-size_in_bytes, G3_scratch);
1472 save(SP, G3_scratch, SP);
1473 }
1474 }
1477 void MacroAssembler::save_frame_and_mov(int extraWords,
1478 Register s1, Register d1,
1479 Register s2, Register d2) {
1480 assert_not_delayed();
1482 // The trick here is to use precisely the same memory word
1483 // that trap handlers also use to save the register.
1484 // This word cannot be used for any other purpose, but
1485 // it works fine to save the register's value, whether or not
1486 // an interrupt flushes register windows at any given moment!
1487 Address s1_addr;
1488 if (s1->is_valid() && (s1->is_in() || s1->is_local())) {
1489 s1_addr = s1->address_in_saved_window();
1490 st_ptr(s1, s1_addr);
1491 }
1493 Address s2_addr;
1494 if (s2->is_valid() && (s2->is_in() || s2->is_local())) {
1495 s2_addr = s2->address_in_saved_window();
1496 st_ptr(s2, s2_addr);
1497 }
1499 save_frame(extraWords);
1501 if (s1_addr.base() == SP) {
1502 ld_ptr(s1_addr.after_save(), d1);
1503 } else if (s1->is_valid()) {
1504 mov(s1->after_save(), d1);
1505 }
1507 if (s2_addr.base() == SP) {
1508 ld_ptr(s2_addr.after_save(), d2);
1509 } else if (s2->is_valid()) {
1510 mov(s2->after_save(), d2);
1511 }
1512 }
1515 Address MacroAssembler::allocate_oop_address(jobject obj, Register d) {
1516 assert(oop_recorder() != NULL, "this assembler needs an OopRecorder");
1517 int oop_index = oop_recorder()->allocate_index(obj);
1518 return Address(d, address(obj), oop_Relocation::spec(oop_index));
1519 }
1522 Address MacroAssembler::constant_oop_address(jobject obj, Register d) {
1523 assert(oop_recorder() != NULL, "this assembler needs an OopRecorder");
1524 int oop_index = oop_recorder()->find_index(obj);
1525 return Address(d, address(obj), oop_Relocation::spec(oop_index));
1526 }
1529 void MacroAssembler::align(int modulus) {
1530 while (offset() % modulus != 0) nop();
1531 }
1534 void MacroAssembler::safepoint() {
1535 relocate(breakpoint_Relocation::spec(breakpoint_Relocation::safepoint));
1536 }
1539 void RegistersForDebugging::print(outputStream* s) {
1540 int j;
1541 for ( j = 0; j < 8; ++j )
1542 if ( j != 6 ) s->print_cr("i%d = 0x%.16lx", j, i[j]);
1543 else s->print_cr( "fp = 0x%.16lx", i[j]);
1544 s->cr();
1546 for ( j = 0; j < 8; ++j )
1547 s->print_cr("l%d = 0x%.16lx", j, l[j]);
1548 s->cr();
1550 for ( j = 0; j < 8; ++j )
1551 if ( j != 6 ) s->print_cr("o%d = 0x%.16lx", j, o[j]);
1552 else s->print_cr( "sp = 0x%.16lx", o[j]);
1553 s->cr();
1555 for ( j = 0; j < 8; ++j )
1556 s->print_cr("g%d = 0x%.16lx", j, g[j]);
1557 s->cr();
1559 // print out floats with compression
1560 for (j = 0; j < 32; ) {
1561 jfloat val = f[j];
1562 int last = j;
1563 for ( ; last+1 < 32; ++last ) {
1564 char b1[1024], b2[1024];
1565 sprintf(b1, "%f", val);
1566 sprintf(b2, "%f", f[last+1]);
1567 if (strcmp(b1, b2))
1568 break;
1569 }
1570 s->print("f%d", j);
1571 if ( j != last ) s->print(" - f%d", last);
1572 s->print(" = %f", val);
1573 s->fill_to(25);
1574 s->print_cr(" (0x%x)", val);
1575 j = last + 1;
1576 }
1577 s->cr();
1579 // and doubles (evens only)
1580 for (j = 0; j < 32; ) {
1581 jdouble val = d[j];
1582 int last = j;
1583 for ( ; last+1 < 32; ++last ) {
1584 char b1[1024], b2[1024];
1585 sprintf(b1, "%f", val);
1586 sprintf(b2, "%f", d[last+1]);
1587 if (strcmp(b1, b2))
1588 break;
1589 }
1590 s->print("d%d", 2 * j);
1591 if ( j != last ) s->print(" - d%d", last);
1592 s->print(" = %f", val);
1593 s->fill_to(30);
1594 s->print("(0x%x)", *(int*)&val);
1595 s->fill_to(42);
1596 s->print_cr("(0x%x)", *(1 + (int*)&val));
1597 j = last + 1;
1598 }
1599 s->cr();
1600 }
1602 void RegistersForDebugging::save_registers(MacroAssembler* a) {
1603 a->sub(FP, round_to(sizeof(RegistersForDebugging), sizeof(jdouble)) - STACK_BIAS, O0);
1604 a->flush_windows();
1605 int i;
1606 for (i = 0; i < 8; ++i) {
1607 a->ld_ptr(as_iRegister(i)->address_in_saved_window().after_save(), L1); a->st_ptr( L1, O0, i_offset(i));
1608 a->ld_ptr(as_lRegister(i)->address_in_saved_window().after_save(), L1); a->st_ptr( L1, O0, l_offset(i));
1609 a->st_ptr(as_oRegister(i)->after_save(), O0, o_offset(i));
1610 a->st_ptr(as_gRegister(i)->after_save(), O0, g_offset(i));
1611 }
1612 for (i = 0; i < 32; ++i) {
1613 a->stf(FloatRegisterImpl::S, as_FloatRegister(i), O0, f_offset(i));
1614 }
1615 for (i = 0; i < (VM_Version::v9_instructions_work() ? 64 : 32); i += 2) {
1616 a->stf(FloatRegisterImpl::D, as_FloatRegister(i), O0, d_offset(i));
1617 }
1618 }
1620 void RegistersForDebugging::restore_registers(MacroAssembler* a, Register r) {
1621 for (int i = 1; i < 8; ++i) {
1622 a->ld_ptr(r, g_offset(i), as_gRegister(i));
1623 }
1624 for (int j = 0; j < 32; ++j) {
1625 a->ldf(FloatRegisterImpl::S, O0, f_offset(j), as_FloatRegister(j));
1626 }
1627 for (int k = 0; k < (VM_Version::v9_instructions_work() ? 64 : 32); k += 2) {
1628 a->ldf(FloatRegisterImpl::D, O0, d_offset(k), as_FloatRegister(k));
1629 }
1630 }
1633 // pushes double TOS element of FPU stack on CPU stack; pops from FPU stack
1634 void MacroAssembler::push_fTOS() {
1635 // %%%%%% need to implement this
1636 }
1638 // pops double TOS element from CPU stack and pushes on FPU stack
1639 void MacroAssembler::pop_fTOS() {
1640 // %%%%%% need to implement this
1641 }
1643 void MacroAssembler::empty_FPU_stack() {
1644 // %%%%%% need to implement this
1645 }
1647 void MacroAssembler::_verify_oop(Register reg, const char* msg, const char * file, int line) {
1648 // plausibility check for oops
1649 if (!VerifyOops) return;
1651 if (reg == G0) return; // always NULL, which is always an oop
1653 char buffer[64];
1654 #ifdef COMPILER1
1655 if (CommentedAssembly) {
1656 snprintf(buffer, sizeof(buffer), "verify_oop at %d", offset());
1657 block_comment(buffer);
1658 }
1659 #endif
1661 int len = strlen(file) + strlen(msg) + 1 + 4;
1662 sprintf(buffer, "%d", line);
1663 len += strlen(buffer);
1664 sprintf(buffer, " at offset %d ", offset());
1665 len += strlen(buffer);
1666 char * real_msg = new char[len];
1667 sprintf(real_msg, "%s%s(%s:%d)", msg, buffer, file, line);
1669 // Call indirectly to solve generation ordering problem
1670 Address a(O7, (address)StubRoutines::verify_oop_subroutine_entry_address());
1672 // Make some space on stack above the current register window.
1673 // Enough to hold 8 64-bit registers.
1674 add(SP,-8*8,SP);
1676 // Save some 64-bit registers; a normal 'save' chops the heads off
1677 // of 64-bit longs in the 32-bit build.
1678 stx(O0,SP,frame::register_save_words*wordSize+STACK_BIAS+0*8);
1679 stx(O1,SP,frame::register_save_words*wordSize+STACK_BIAS+1*8);
1680 mov(reg,O0); // Move arg into O0; arg might be in O7 which is about to be crushed
1681 stx(O7,SP,frame::register_save_words*wordSize+STACK_BIAS+7*8);
1683 set((intptr_t)real_msg, O1);
1684 // Load address to call to into O7
1685 load_ptr_contents(a, O7);
1686 // Register call to verify_oop_subroutine
1687 callr(O7, G0);
1688 delayed()->nop();
1689 // recover frame size
1690 add(SP, 8*8,SP);
1691 }
1693 void MacroAssembler::_verify_oop_addr(Address addr, const char* msg, const char * file, int line) {
1694 // plausibility check for oops
1695 if (!VerifyOops) return;
1697 char buffer[64];
1698 sprintf(buffer, "%d", line);
1699 int len = strlen(file) + strlen(msg) + 1 + 4 + strlen(buffer);
1700 sprintf(buffer, " at SP+%d ", addr.disp());
1701 len += strlen(buffer);
1702 char * real_msg = new char[len];
1703 sprintf(real_msg, "%s at SP+%d (%s:%d)", msg, addr.disp(), file, line);
1705 // Call indirectly to solve generation ordering problem
1706 Address a(O7, (address)StubRoutines::verify_oop_subroutine_entry_address());
1708 // Make some space on stack above the current register window.
1709 // Enough to hold 8 64-bit registers.
1710 add(SP,-8*8,SP);
1712 // Save some 64-bit registers; a normal 'save' chops the heads off
1713 // of 64-bit longs in the 32-bit build.
1714 stx(O0,SP,frame::register_save_words*wordSize+STACK_BIAS+0*8);
1715 stx(O1,SP,frame::register_save_words*wordSize+STACK_BIAS+1*8);
1716 ld_ptr(addr.base(), addr.disp() + 8*8, O0); // Load arg into O0; arg might be in O7 which is about to be crushed
1717 stx(O7,SP,frame::register_save_words*wordSize+STACK_BIAS+7*8);
1719 set((intptr_t)real_msg, O1);
1720 // Load address to call to into O7
1721 load_ptr_contents(a, O7);
1722 // Register call to verify_oop_subroutine
1723 callr(O7, G0);
1724 delayed()->nop();
1725 // recover frame size
1726 add(SP, 8*8,SP);
1727 }
1729 // side-door communication with signalHandler in os_solaris.cpp
1730 address MacroAssembler::_verify_oop_implicit_branch[3] = { NULL };
1732 // This macro is expanded just once; it creates shared code. Contract:
1733 // receives an oop in O0. Must restore O0 & O7 from TLS. Must not smash ANY
1734 // registers, including flags. May not use a register 'save', as this blows
1735 // the high bits of the O-regs if they contain Long values. Acts as a 'leaf'
1736 // call.
1737 void MacroAssembler::verify_oop_subroutine() {
1738 assert( VM_Version::v9_instructions_work(), "VerifyOops not supported for V8" );
1740 // Leaf call; no frame.
1741 Label succeed, fail, null_or_fail;
1743 // O0 and O7 were saved already (O0 in O0's TLS home, O7 in O5's TLS home).
1744 // O0 is now the oop to be checked. O7 is the return address.
1745 Register O0_obj = O0;
1747 // Save some more registers for temps.
1748 stx(O2,SP,frame::register_save_words*wordSize+STACK_BIAS+2*8);
1749 stx(O3,SP,frame::register_save_words*wordSize+STACK_BIAS+3*8);
1750 stx(O4,SP,frame::register_save_words*wordSize+STACK_BIAS+4*8);
1751 stx(O5,SP,frame::register_save_words*wordSize+STACK_BIAS+5*8);
1753 // Save flags
1754 Register O5_save_flags = O5;
1755 rdccr( O5_save_flags );
1757 { // count number of verifies
1758 Register O2_adr = O2;
1759 Register O3_accum = O3;
1760 Address count_addr( O2_adr, (address) StubRoutines::verify_oop_count_addr() );
1761 sethi(count_addr);
1762 ld(count_addr, O3_accum);
1763 inc(O3_accum);
1764 st(O3_accum, count_addr);
1765 }
1767 Register O2_mask = O2;
1768 Register O3_bits = O3;
1769 Register O4_temp = O4;
1771 // mark lower end of faulting range
1772 assert(_verify_oop_implicit_branch[0] == NULL, "set once");
1773 _verify_oop_implicit_branch[0] = pc();
1775 // We can't check the mark oop because it could be in the process of
1776 // locking or unlocking while this is running.
1777 set(Universe::verify_oop_mask (), O2_mask);
1778 set(Universe::verify_oop_bits (), O3_bits);
1780 // assert((obj & oop_mask) == oop_bits);
1781 and3(O0_obj, O2_mask, O4_temp);
1782 cmp(O4_temp, O3_bits);
1783 brx(notEqual, false, pn, null_or_fail);
1784 delayed()->nop();
1786 if ((NULL_WORD & Universe::verify_oop_mask()) == Universe::verify_oop_bits()) {
1787 // the null_or_fail case is useless; must test for null separately
1788 br_null(O0_obj, false, pn, succeed);
1789 delayed()->nop();
1790 }
1792 // Check the klassOop of this object for being in the right area of memory.
1793 // Cannot do the load in the delay above slot in case O0 is null
1794 load_klass(O0_obj, O0_obj);
1795 // assert((klass & klass_mask) == klass_bits);
1796 if( Universe::verify_klass_mask() != Universe::verify_oop_mask() )
1797 set(Universe::verify_klass_mask(), O2_mask);
1798 if( Universe::verify_klass_bits() != Universe::verify_oop_bits() )
1799 set(Universe::verify_klass_bits(), O3_bits);
1800 and3(O0_obj, O2_mask, O4_temp);
1801 cmp(O4_temp, O3_bits);
1802 brx(notEqual, false, pn, fail);
1803 delayed()->nop();
1804 // Check the klass's klass
1805 load_klass(O0_obj, O0_obj);
1806 and3(O0_obj, O2_mask, O4_temp);
1807 cmp(O4_temp, O3_bits);
1808 brx(notEqual, false, pn, fail);
1809 delayed()->wrccr( O5_save_flags ); // Restore CCR's
1811 // mark upper end of faulting range
1812 _verify_oop_implicit_branch[1] = pc();
1814 //-----------------------
1815 // all tests pass
1816 bind(succeed);
1818 // Restore prior 64-bit registers
1819 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+0*8,O0);
1820 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+1*8,O1);
1821 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+2*8,O2);
1822 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+3*8,O3);
1823 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+4*8,O4);
1824 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+5*8,O5);
1826 retl(); // Leaf return; restore prior O7 in delay slot
1827 delayed()->ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+7*8,O7);
1829 //-----------------------
1830 bind(null_or_fail); // nulls are less common but OK
1831 br_null(O0_obj, false, pt, succeed);
1832 delayed()->wrccr( O5_save_flags ); // Restore CCR's
1834 //-----------------------
1835 // report failure:
1836 bind(fail);
1837 _verify_oop_implicit_branch[2] = pc();
1839 wrccr( O5_save_flags ); // Restore CCR's
1841 save_frame(::round_to(sizeof(RegistersForDebugging) / BytesPerWord, 2));
1843 // stop_subroutine expects message pointer in I1.
1844 mov(I1, O1);
1846 // Restore prior 64-bit registers
1847 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+0*8,I0);
1848 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+1*8,I1);
1849 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+2*8,I2);
1850 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+3*8,I3);
1851 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+4*8,I4);
1852 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+5*8,I5);
1854 // factor long stop-sequence into subroutine to save space
1855 assert(StubRoutines::Sparc::stop_subroutine_entry_address(), "hasn't been generated yet");
1857 // call indirectly to solve generation ordering problem
1858 Address a(O5, (address)StubRoutines::Sparc::stop_subroutine_entry_address());
1859 load_ptr_contents(a, O5);
1860 jmpl(O5, 0, O7);
1861 delayed()->nop();
1862 }
1865 void MacroAssembler::stop(const char* msg) {
1866 // save frame first to get O7 for return address
1867 // add one word to size in case struct is odd number of words long
1868 // It must be doubleword-aligned for storing doubles into it.
1870 save_frame(::round_to(sizeof(RegistersForDebugging) / BytesPerWord, 2));
1872 // stop_subroutine expects message pointer in I1.
1873 set((intptr_t)msg, O1);
1875 // factor long stop-sequence into subroutine to save space
1876 assert(StubRoutines::Sparc::stop_subroutine_entry_address(), "hasn't been generated yet");
1878 // call indirectly to solve generation ordering problem
1879 Address a(O5, (address)StubRoutines::Sparc::stop_subroutine_entry_address());
1880 load_ptr_contents(a, O5);
1881 jmpl(O5, 0, O7);
1882 delayed()->nop();
1884 breakpoint_trap(); // make stop actually stop rather than writing
1885 // unnoticeable results in the output files.
1887 // restore(); done in callee to save space!
1888 }
1891 void MacroAssembler::warn(const char* msg) {
1892 save_frame(::round_to(sizeof(RegistersForDebugging) / BytesPerWord, 2));
1893 RegistersForDebugging::save_registers(this);
1894 mov(O0, L0);
1895 set((intptr_t)msg, O0);
1896 call( CAST_FROM_FN_PTR(address, warning) );
1897 delayed()->nop();
1898 // ret();
1899 // delayed()->restore();
1900 RegistersForDebugging::restore_registers(this, L0);
1901 restore();
1902 }
1905 void MacroAssembler::untested(const char* what) {
1906 // We must be able to turn interactive prompting off
1907 // in order to run automated test scripts on the VM
1908 // Use the flag ShowMessageBoxOnError
1910 char* b = new char[1024];
1911 sprintf(b, "untested: %s", what);
1913 if ( ShowMessageBoxOnError ) stop(b);
1914 else warn(b);
1915 }
1918 void MacroAssembler::stop_subroutine() {
1919 RegistersForDebugging::save_registers(this);
1921 // for the sake of the debugger, stick a PC on the current frame
1922 // (this assumes that the caller has performed an extra "save")
1923 mov(I7, L7);
1924 add(O7, -7 * BytesPerInt, I7);
1926 save_frame(); // one more save to free up another O7 register
1927 mov(I0, O1); // addr of reg save area
1929 // We expect pointer to message in I1. Caller must set it up in O1
1930 mov(I1, O0); // get msg
1931 call (CAST_FROM_FN_PTR(address, MacroAssembler::debug), relocInfo::runtime_call_type);
1932 delayed()->nop();
1934 restore();
1936 RegistersForDebugging::restore_registers(this, O0);
1938 save_frame(0);
1939 call(CAST_FROM_FN_PTR(address,breakpoint));
1940 delayed()->nop();
1941 restore();
1943 mov(L7, I7);
1944 retl();
1945 delayed()->restore(); // see stop above
1946 }
1949 void MacroAssembler::debug(char* msg, RegistersForDebugging* regs) {
1950 if ( ShowMessageBoxOnError ) {
1951 JavaThreadState saved_state = JavaThread::current()->thread_state();
1952 JavaThread::current()->set_thread_state(_thread_in_vm);
1953 {
1954 // In order to get locks work, we need to fake a in_VM state
1955 ttyLocker ttyl;
1956 ::tty->print_cr("EXECUTION STOPPED: %s\n", msg);
1957 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
1958 ::tty->print_cr("Interpreter::bytecode_counter = %d", BytecodeCounter::counter_value());
1959 }
1960 if (os::message_box(msg, "Execution stopped, print registers?"))
1961 regs->print(::tty);
1962 }
1963 ThreadStateTransition::transition(JavaThread::current(), _thread_in_vm, saved_state);
1964 }
1965 else
1966 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", msg);
1967 assert(false, "error");
1968 }
1971 #ifndef PRODUCT
1972 void MacroAssembler::test() {
1973 ResourceMark rm;
1975 CodeBuffer cb("test", 10000, 10000);
1976 MacroAssembler* a = new MacroAssembler(&cb);
1977 VM_Version::allow_all();
1978 a->test_v9();
1979 a->test_v8_onlys();
1980 VM_Version::revert();
1982 StubRoutines::Sparc::test_stop_entry()();
1983 }
1984 #endif
1987 void MacroAssembler::calc_mem_param_words(Register Rparam_words, Register Rresult) {
1988 subcc( Rparam_words, Argument::n_register_parameters, Rresult); // how many mem words?
1989 Label no_extras;
1990 br( negative, true, pt, no_extras ); // if neg, clear reg
1991 delayed()->set( 0, Rresult); // annuled, so only if taken
1992 bind( no_extras );
1993 }
1996 void MacroAssembler::calc_frame_size(Register Rextra_words, Register Rresult) {
1997 #ifdef _LP64
1998 add(Rextra_words, frame::memory_parameter_word_sp_offset, Rresult);
1999 #else
2000 add(Rextra_words, frame::memory_parameter_word_sp_offset + 1, Rresult);
2001 #endif
2002 bclr(1, Rresult);
2003 sll(Rresult, LogBytesPerWord, Rresult); // Rresult has total frame bytes
2004 }
2007 void MacroAssembler::calc_frame_size_and_save(Register Rextra_words, Register Rresult) {
2008 calc_frame_size(Rextra_words, Rresult);
2009 neg(Rresult);
2010 save(SP, Rresult, SP);
2011 }
2014 // ---------------------------------------------------------
2015 Assembler::RCondition cond2rcond(Assembler::Condition c) {
2016 switch (c) {
2017 /*case zero: */
2018 case Assembler::equal: return Assembler::rc_z;
2019 case Assembler::lessEqual: return Assembler::rc_lez;
2020 case Assembler::less: return Assembler::rc_lz;
2021 /*case notZero:*/
2022 case Assembler::notEqual: return Assembler::rc_nz;
2023 case Assembler::greater: return Assembler::rc_gz;
2024 case Assembler::greaterEqual: return Assembler::rc_gez;
2025 }
2026 ShouldNotReachHere();
2027 return Assembler::rc_z;
2028 }
2030 // compares register with zero and branches. NOT FOR USE WITH 64-bit POINTERS
2031 void MacroAssembler::br_zero( Condition c, bool a, Predict p, Register s1, Label& L) {
2032 tst(s1);
2033 br (c, a, p, L);
2034 }
2037 // Compares a pointer register with zero and branches on null.
2038 // Does a test & branch on 32-bit systems and a register-branch on 64-bit.
2039 void MacroAssembler::br_null( Register s1, bool a, Predict p, Label& L ) {
2040 assert_not_delayed();
2041 #ifdef _LP64
2042 bpr( rc_z, a, p, s1, L );
2043 #else
2044 tst(s1);
2045 br ( zero, a, p, L );
2046 #endif
2047 }
2049 void MacroAssembler::br_notnull( Register s1, bool a, Predict p, Label& L ) {
2050 assert_not_delayed();
2051 #ifdef _LP64
2052 bpr( rc_nz, a, p, s1, L );
2053 #else
2054 tst(s1);
2055 br ( notZero, a, p, L );
2056 #endif
2057 }
2059 void MacroAssembler::br_on_reg_cond( RCondition rc, bool a, Predict p,
2060 Register s1, address d,
2061 relocInfo::relocType rt ) {
2062 if (VM_Version::v9_instructions_work()) {
2063 bpr(rc, a, p, s1, d, rt);
2064 } else {
2065 tst(s1);
2066 br(reg_cond_to_cc_cond(rc), a, p, d, rt);
2067 }
2068 }
2070 void MacroAssembler::br_on_reg_cond( RCondition rc, bool a, Predict p,
2071 Register s1, Label& L ) {
2072 if (VM_Version::v9_instructions_work()) {
2073 bpr(rc, a, p, s1, L);
2074 } else {
2075 tst(s1);
2076 br(reg_cond_to_cc_cond(rc), a, p, L);
2077 }
2078 }
2081 // instruction sequences factored across compiler & interpreter
2084 void MacroAssembler::lcmp( Register Ra_hi, Register Ra_low,
2085 Register Rb_hi, Register Rb_low,
2086 Register Rresult) {
2088 Label check_low_parts, done;
2090 cmp(Ra_hi, Rb_hi ); // compare hi parts
2091 br(equal, true, pt, check_low_parts);
2092 delayed()->cmp(Ra_low, Rb_low); // test low parts
2094 // And, with an unsigned comparison, it does not matter if the numbers
2095 // are negative or not.
2096 // E.g., -2 cmp -1: the low parts are 0xfffffffe and 0xffffffff.
2097 // The second one is bigger (unsignedly).
2099 // Other notes: The first move in each triplet can be unconditional
2100 // (and therefore probably prefetchable).
2101 // And the equals case for the high part does not need testing,
2102 // since that triplet is reached only after finding the high halves differ.
2104 if (VM_Version::v9_instructions_work()) {
2106 mov ( -1, Rresult);
2107 ba( false, done ); delayed()-> movcc(greater, false, icc, 1, Rresult);
2108 }
2109 else {
2110 br(less, true, pt, done); delayed()-> set(-1, Rresult);
2111 br(greater, true, pt, done); delayed()-> set( 1, Rresult);
2112 }
2114 bind( check_low_parts );
2116 if (VM_Version::v9_instructions_work()) {
2117 mov( -1, Rresult);
2118 movcc(equal, false, icc, 0, Rresult);
2119 movcc(greaterUnsigned, false, icc, 1, Rresult);
2120 }
2121 else {
2122 set(-1, Rresult);
2123 br(equal, true, pt, done); delayed()->set( 0, Rresult);
2124 br(greaterUnsigned, true, pt, done); delayed()->set( 1, Rresult);
2125 }
2126 bind( done );
2127 }
2129 void MacroAssembler::lneg( Register Rhi, Register Rlow ) {
2130 subcc( G0, Rlow, Rlow );
2131 subc( G0, Rhi, Rhi );
2132 }
2134 void MacroAssembler::lshl( Register Rin_high, Register Rin_low,
2135 Register Rcount,
2136 Register Rout_high, Register Rout_low,
2137 Register Rtemp ) {
2140 Register Ralt_count = Rtemp;
2141 Register Rxfer_bits = Rtemp;
2143 assert( Ralt_count != Rin_high
2144 && Ralt_count != Rin_low
2145 && Ralt_count != Rcount
2146 && Rxfer_bits != Rin_low
2147 && Rxfer_bits != Rin_high
2148 && Rxfer_bits != Rcount
2149 && Rxfer_bits != Rout_low
2150 && Rout_low != Rin_high,
2151 "register alias checks");
2153 Label big_shift, done;
2155 // This code can be optimized to use the 64 bit shifts in V9.
2156 // Here we use the 32 bit shifts.
2158 and3( Rcount, 0x3f, Rcount); // take least significant 6 bits
2159 subcc(Rcount, 31, Ralt_count);
2160 br(greater, true, pn, big_shift);
2161 delayed()->
2162 dec(Ralt_count);
2164 // shift < 32 bits, Ralt_count = Rcount-31
2166 // We get the transfer bits by shifting right by 32-count the low
2167 // register. This is done by shifting right by 31-count and then by one
2168 // more to take care of the special (rare) case where count is zero
2169 // (shifting by 32 would not work).
2171 neg( Ralt_count );
2173 // The order of the next two instructions is critical in the case where
2174 // Rin and Rout are the same and should not be reversed.
2176 srl( Rin_low, Ralt_count, Rxfer_bits ); // shift right by 31-count
2177 if (Rcount != Rout_low) {
2178 sll( Rin_low, Rcount, Rout_low ); // low half
2179 }
2180 sll( Rin_high, Rcount, Rout_high );
2181 if (Rcount == Rout_low) {
2182 sll( Rin_low, Rcount, Rout_low ); // low half
2183 }
2184 srl( Rxfer_bits, 1, Rxfer_bits ); // shift right by one more
2185 ba (false, done);
2186 delayed()->
2187 or3( Rout_high, Rxfer_bits, Rout_high); // new hi value: or in shifted old hi part and xfer from low
2189 // shift >= 32 bits, Ralt_count = Rcount-32
2190 bind(big_shift);
2191 sll( Rin_low, Ralt_count, Rout_high );
2192 clr( Rout_low );
2194 bind(done);
2195 }
2198 void MacroAssembler::lshr( Register Rin_high, Register Rin_low,
2199 Register Rcount,
2200 Register Rout_high, Register Rout_low,
2201 Register Rtemp ) {
2203 Register Ralt_count = Rtemp;
2204 Register Rxfer_bits = Rtemp;
2206 assert( Ralt_count != Rin_high
2207 && Ralt_count != Rin_low
2208 && Ralt_count != Rcount
2209 && Rxfer_bits != Rin_low
2210 && Rxfer_bits != Rin_high
2211 && Rxfer_bits != Rcount
2212 && Rxfer_bits != Rout_high
2213 && Rout_high != Rin_low,
2214 "register alias checks");
2216 Label big_shift, done;
2218 // This code can be optimized to use the 64 bit shifts in V9.
2219 // Here we use the 32 bit shifts.
2221 and3( Rcount, 0x3f, Rcount); // take least significant 6 bits
2222 subcc(Rcount, 31, Ralt_count);
2223 br(greater, true, pn, big_shift);
2224 delayed()->dec(Ralt_count);
2226 // shift < 32 bits, Ralt_count = Rcount-31
2228 // We get the transfer bits by shifting left by 32-count the high
2229 // register. This is done by shifting left by 31-count and then by one
2230 // more to take care of the special (rare) case where count is zero
2231 // (shifting by 32 would not work).
2233 neg( Ralt_count );
2234 if (Rcount != Rout_low) {
2235 srl( Rin_low, Rcount, Rout_low );
2236 }
2238 // The order of the next two instructions is critical in the case where
2239 // Rin and Rout are the same and should not be reversed.
2241 sll( Rin_high, Ralt_count, Rxfer_bits ); // shift left by 31-count
2242 sra( Rin_high, Rcount, Rout_high ); // high half
2243 sll( Rxfer_bits, 1, Rxfer_bits ); // shift left by one more
2244 if (Rcount == Rout_low) {
2245 srl( Rin_low, Rcount, Rout_low );
2246 }
2247 ba (false, done);
2248 delayed()->
2249 or3( Rout_low, Rxfer_bits, Rout_low ); // new low value: or shifted old low part and xfer from high
2251 // shift >= 32 bits, Ralt_count = Rcount-32
2252 bind(big_shift);
2254 sra( Rin_high, Ralt_count, Rout_low );
2255 sra( Rin_high, 31, Rout_high ); // sign into hi
2257 bind( done );
2258 }
2262 void MacroAssembler::lushr( Register Rin_high, Register Rin_low,
2263 Register Rcount,
2264 Register Rout_high, Register Rout_low,
2265 Register Rtemp ) {
2267 Register Ralt_count = Rtemp;
2268 Register Rxfer_bits = Rtemp;
2270 assert( Ralt_count != Rin_high
2271 && Ralt_count != Rin_low
2272 && Ralt_count != Rcount
2273 && Rxfer_bits != Rin_low
2274 && Rxfer_bits != Rin_high
2275 && Rxfer_bits != Rcount
2276 && Rxfer_bits != Rout_high
2277 && Rout_high != Rin_low,
2278 "register alias checks");
2280 Label big_shift, done;
2282 // This code can be optimized to use the 64 bit shifts in V9.
2283 // Here we use the 32 bit shifts.
2285 and3( Rcount, 0x3f, Rcount); // take least significant 6 bits
2286 subcc(Rcount, 31, Ralt_count);
2287 br(greater, true, pn, big_shift);
2288 delayed()->dec(Ralt_count);
2290 // shift < 32 bits, Ralt_count = Rcount-31
2292 // We get the transfer bits by shifting left by 32-count the high
2293 // register. This is done by shifting left by 31-count and then by one
2294 // more to take care of the special (rare) case where count is zero
2295 // (shifting by 32 would not work).
2297 neg( Ralt_count );
2298 if (Rcount != Rout_low) {
2299 srl( Rin_low, Rcount, Rout_low );
2300 }
2302 // The order of the next two instructions is critical in the case where
2303 // Rin and Rout are the same and should not be reversed.
2305 sll( Rin_high, Ralt_count, Rxfer_bits ); // shift left by 31-count
2306 srl( Rin_high, Rcount, Rout_high ); // high half
2307 sll( Rxfer_bits, 1, Rxfer_bits ); // shift left by one more
2308 if (Rcount == Rout_low) {
2309 srl( Rin_low, Rcount, Rout_low );
2310 }
2311 ba (false, done);
2312 delayed()->
2313 or3( Rout_low, Rxfer_bits, Rout_low ); // new low value: or shifted old low part and xfer from high
2315 // shift >= 32 bits, Ralt_count = Rcount-32
2316 bind(big_shift);
2318 srl( Rin_high, Ralt_count, Rout_low );
2319 clr( Rout_high );
2321 bind( done );
2322 }
2324 #ifdef _LP64
2325 void MacroAssembler::lcmp( Register Ra, Register Rb, Register Rresult) {
2326 cmp(Ra, Rb);
2327 mov( -1, Rresult);
2328 movcc(equal, false, xcc, 0, Rresult);
2329 movcc(greater, false, xcc, 1, Rresult);
2330 }
2331 #endif
2334 void MacroAssembler::float_cmp( bool is_float, int unordered_result,
2335 FloatRegister Fa, FloatRegister Fb,
2336 Register Rresult) {
2338 fcmp(is_float ? FloatRegisterImpl::S : FloatRegisterImpl::D, fcc0, Fa, Fb);
2340 Condition lt = unordered_result == -1 ? f_unorderedOrLess : f_less;
2341 Condition eq = f_equal;
2342 Condition gt = unordered_result == 1 ? f_unorderedOrGreater : f_greater;
2344 if (VM_Version::v9_instructions_work()) {
2346 mov( -1, Rresult );
2347 movcc( eq, true, fcc0, 0, Rresult );
2348 movcc( gt, true, fcc0, 1, Rresult );
2350 } else {
2351 Label done;
2353 set( -1, Rresult );
2354 //fb(lt, true, pn, done); delayed()->set( -1, Rresult );
2355 fb( eq, true, pn, done); delayed()->set( 0, Rresult );
2356 fb( gt, true, pn, done); delayed()->set( 1, Rresult );
2358 bind (done);
2359 }
2360 }
2363 void MacroAssembler::fneg( FloatRegisterImpl::Width w, FloatRegister s, FloatRegister d)
2364 {
2365 if (VM_Version::v9_instructions_work()) {
2366 Assembler::fneg(w, s, d);
2367 } else {
2368 if (w == FloatRegisterImpl::S) {
2369 Assembler::fneg(w, s, d);
2370 } else if (w == FloatRegisterImpl::D) {
2371 // number() does a sanity check on the alignment.
2372 assert(((s->encoding(FloatRegisterImpl::D) & 1) == 0) &&
2373 ((d->encoding(FloatRegisterImpl::D) & 1) == 0), "float register alignment check");
2375 Assembler::fneg(FloatRegisterImpl::S, s, d);
2376 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor());
2377 } else {
2378 assert(w == FloatRegisterImpl::Q, "Invalid float register width");
2380 // number() does a sanity check on the alignment.
2381 assert(((s->encoding(FloatRegisterImpl::D) & 3) == 0) &&
2382 ((d->encoding(FloatRegisterImpl::D) & 3) == 0), "float register alignment check");
2384 Assembler::fneg(FloatRegisterImpl::S, s, d);
2385 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor());
2386 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor(), d->successor()->successor());
2387 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor()->successor(), d->successor()->successor()->successor());
2388 }
2389 }
2390 }
2392 void MacroAssembler::fmov( FloatRegisterImpl::Width w, FloatRegister s, FloatRegister d)
2393 {
2394 if (VM_Version::v9_instructions_work()) {
2395 Assembler::fmov(w, s, d);
2396 } else {
2397 if (w == FloatRegisterImpl::S) {
2398 Assembler::fmov(w, s, d);
2399 } else if (w == FloatRegisterImpl::D) {
2400 // number() does a sanity check on the alignment.
2401 assert(((s->encoding(FloatRegisterImpl::D) & 1) == 0) &&
2402 ((d->encoding(FloatRegisterImpl::D) & 1) == 0), "float register alignment check");
2404 Assembler::fmov(FloatRegisterImpl::S, s, d);
2405 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor());
2406 } else {
2407 assert(w == FloatRegisterImpl::Q, "Invalid float register width");
2409 // number() does a sanity check on the alignment.
2410 assert(((s->encoding(FloatRegisterImpl::D) & 3) == 0) &&
2411 ((d->encoding(FloatRegisterImpl::D) & 3) == 0), "float register alignment check");
2413 Assembler::fmov(FloatRegisterImpl::S, s, d);
2414 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor());
2415 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor(), d->successor()->successor());
2416 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor()->successor(), d->successor()->successor()->successor());
2417 }
2418 }
2419 }
2421 void MacroAssembler::fabs( FloatRegisterImpl::Width w, FloatRegister s, FloatRegister d)
2422 {
2423 if (VM_Version::v9_instructions_work()) {
2424 Assembler::fabs(w, s, d);
2425 } else {
2426 if (w == FloatRegisterImpl::S) {
2427 Assembler::fabs(w, s, d);
2428 } else if (w == FloatRegisterImpl::D) {
2429 // number() does a sanity check on the alignment.
2430 assert(((s->encoding(FloatRegisterImpl::D) & 1) == 0) &&
2431 ((d->encoding(FloatRegisterImpl::D) & 1) == 0), "float register alignment check");
2433 Assembler::fabs(FloatRegisterImpl::S, s, d);
2434 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor());
2435 } else {
2436 assert(w == FloatRegisterImpl::Q, "Invalid float register width");
2438 // number() does a sanity check on the alignment.
2439 assert(((s->encoding(FloatRegisterImpl::D) & 3) == 0) &&
2440 ((d->encoding(FloatRegisterImpl::D) & 3) == 0), "float register alignment check");
2442 Assembler::fabs(FloatRegisterImpl::S, s, d);
2443 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor());
2444 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor(), d->successor()->successor());
2445 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor()->successor(), d->successor()->successor()->successor());
2446 }
2447 }
2448 }
2450 void MacroAssembler::save_all_globals_into_locals() {
2451 mov(G1,L1);
2452 mov(G2,L2);
2453 mov(G3,L3);
2454 mov(G4,L4);
2455 mov(G5,L5);
2456 mov(G6,L6);
2457 mov(G7,L7);
2458 }
2460 void MacroAssembler::restore_globals_from_locals() {
2461 mov(L1,G1);
2462 mov(L2,G2);
2463 mov(L3,G3);
2464 mov(L4,G4);
2465 mov(L5,G5);
2466 mov(L6,G6);
2467 mov(L7,G7);
2468 }
2470 // Use for 64 bit operation.
2471 void MacroAssembler::casx_under_lock(Register top_ptr_reg, Register top_reg, Register ptr_reg, address lock_addr, bool use_call_vm)
2472 {
2473 // store ptr_reg as the new top value
2474 #ifdef _LP64
2475 casx(top_ptr_reg, top_reg, ptr_reg);
2476 #else
2477 cas_under_lock(top_ptr_reg, top_reg, ptr_reg, lock_addr, use_call_vm);
2478 #endif // _LP64
2479 }
2481 // [RGV] This routine does not handle 64 bit operations.
2482 // use casx_under_lock() or casx directly!!!
2483 void MacroAssembler::cas_under_lock(Register top_ptr_reg, Register top_reg, Register ptr_reg, address lock_addr, bool use_call_vm)
2484 {
2485 // store ptr_reg as the new top value
2486 if (VM_Version::v9_instructions_work()) {
2487 cas(top_ptr_reg, top_reg, ptr_reg);
2488 } else {
2490 // If the register is not an out nor global, it is not visible
2491 // after the save. Allocate a register for it, save its
2492 // value in the register save area (the save may not flush
2493 // registers to the save area).
2495 Register top_ptr_reg_after_save;
2496 Register top_reg_after_save;
2497 Register ptr_reg_after_save;
2499 if (top_ptr_reg->is_out() || top_ptr_reg->is_global()) {
2500 top_ptr_reg_after_save = top_ptr_reg->after_save();
2501 } else {
2502 Address reg_save_addr = top_ptr_reg->address_in_saved_window();
2503 top_ptr_reg_after_save = L0;
2504 st(top_ptr_reg, reg_save_addr);
2505 }
2507 if (top_reg->is_out() || top_reg->is_global()) {
2508 top_reg_after_save = top_reg->after_save();
2509 } else {
2510 Address reg_save_addr = top_reg->address_in_saved_window();
2511 top_reg_after_save = L1;
2512 st(top_reg, reg_save_addr);
2513 }
2515 if (ptr_reg->is_out() || ptr_reg->is_global()) {
2516 ptr_reg_after_save = ptr_reg->after_save();
2517 } else {
2518 Address reg_save_addr = ptr_reg->address_in_saved_window();
2519 ptr_reg_after_save = L2;
2520 st(ptr_reg, reg_save_addr);
2521 }
2523 const Register& lock_reg = L3;
2524 const Register& lock_ptr_reg = L4;
2525 const Register& value_reg = L5;
2526 const Register& yield_reg = L6;
2527 const Register& yieldall_reg = L7;
2529 save_frame();
2531 if (top_ptr_reg_after_save == L0) {
2532 ld(top_ptr_reg->address_in_saved_window().after_save(), top_ptr_reg_after_save);
2533 }
2535 if (top_reg_after_save == L1) {
2536 ld(top_reg->address_in_saved_window().after_save(), top_reg_after_save);
2537 }
2539 if (ptr_reg_after_save == L2) {
2540 ld(ptr_reg->address_in_saved_window().after_save(), ptr_reg_after_save);
2541 }
2543 Label(retry_get_lock);
2544 Label(not_same);
2545 Label(dont_yield);
2547 assert(lock_addr, "lock_address should be non null for v8");
2548 set((intptr_t)lock_addr, lock_ptr_reg);
2549 // Initialize yield counter
2550 mov(G0,yield_reg);
2551 mov(G0, yieldall_reg);
2552 set(StubRoutines::Sparc::locked, lock_reg);
2554 bind(retry_get_lock);
2555 cmp(yield_reg, V8AtomicOperationUnderLockSpinCount);
2556 br(Assembler::less, false, Assembler::pt, dont_yield);
2557 delayed()->nop();
2559 if(use_call_vm) {
2560 Untested("Need to verify global reg consistancy");
2561 call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::yield_all), yieldall_reg);
2562 } else {
2563 // Save the regs and make space for a C call
2564 save(SP, -96, SP);
2565 save_all_globals_into_locals();
2566 call(CAST_FROM_FN_PTR(address,os::yield_all));
2567 delayed()->mov(yieldall_reg, O0);
2568 restore_globals_from_locals();
2569 restore();
2570 }
2572 // reset the counter
2573 mov(G0,yield_reg);
2574 add(yieldall_reg, 1, yieldall_reg);
2576 bind(dont_yield);
2577 // try to get lock
2578 swap(lock_ptr_reg, 0, lock_reg);
2580 // did we get the lock?
2581 cmp(lock_reg, StubRoutines::Sparc::unlocked);
2582 br(Assembler::notEqual, true, Assembler::pn, retry_get_lock);
2583 delayed()->add(yield_reg,1,yield_reg);
2585 // yes, got lock. do we have the same top?
2586 ld(top_ptr_reg_after_save, 0, value_reg);
2587 cmp(value_reg, top_reg_after_save);
2588 br(Assembler::notEqual, false, Assembler::pn, not_same);
2589 delayed()->nop();
2591 // yes, same top.
2592 st(ptr_reg_after_save, top_ptr_reg_after_save, 0);
2593 membar(Assembler::StoreStore);
2595 bind(not_same);
2596 mov(value_reg, ptr_reg_after_save);
2597 st(lock_reg, lock_ptr_reg, 0); // unlock
2599 restore();
2600 }
2601 }
2603 void MacroAssembler::biased_locking_enter(Register obj_reg, Register mark_reg, Register temp_reg,
2604 Label& done, Label* slow_case,
2605 BiasedLockingCounters* counters) {
2606 assert(UseBiasedLocking, "why call this otherwise?");
2608 if (PrintBiasedLockingStatistics) {
2609 assert_different_registers(obj_reg, mark_reg, temp_reg, O7);
2610 if (counters == NULL)
2611 counters = BiasedLocking::counters();
2612 }
2614 Label cas_label;
2616 // Biased locking
2617 // See whether the lock is currently biased toward our thread and
2618 // whether the epoch is still valid
2619 // Note that the runtime guarantees sufficient alignment of JavaThread
2620 // pointers to allow age to be placed into low bits
2621 assert(markOopDesc::age_shift == markOopDesc::lock_bits + markOopDesc::biased_lock_bits, "biased locking makes assumptions about bit layout");
2622 and3(mark_reg, markOopDesc::biased_lock_mask_in_place, temp_reg);
2623 cmp(temp_reg, markOopDesc::biased_lock_pattern);
2624 brx(Assembler::notEqual, false, Assembler::pn, cas_label);
2625 delayed()->nop();
2627 load_klass(obj_reg, temp_reg);
2628 ld_ptr(Address(temp_reg, 0, Klass::prototype_header_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes()), temp_reg);
2629 or3(G2_thread, temp_reg, temp_reg);
2630 xor3(mark_reg, temp_reg, temp_reg);
2631 andcc(temp_reg, ~((int) markOopDesc::age_mask_in_place), temp_reg);
2632 if (counters != NULL) {
2633 cond_inc(Assembler::equal, (address) counters->biased_lock_entry_count_addr(), mark_reg, temp_reg);
2634 // Reload mark_reg as we may need it later
2635 ld_ptr(Address(obj_reg, 0, oopDesc::mark_offset_in_bytes()), mark_reg);
2636 }
2637 brx(Assembler::equal, true, Assembler::pt, done);
2638 delayed()->nop();
2640 Label try_revoke_bias;
2641 Label try_rebias;
2642 Address mark_addr = Address(obj_reg, 0, oopDesc::mark_offset_in_bytes());
2643 assert(mark_addr.disp() == 0, "cas must take a zero displacement");
2645 // At this point we know that the header has the bias pattern and
2646 // that we are not the bias owner in the current epoch. We need to
2647 // figure out more details about the state of the header in order to
2648 // know what operations can be legally performed on the object's
2649 // header.
2651 // If the low three bits in the xor result aren't clear, that means
2652 // the prototype header is no longer biased and we have to revoke
2653 // the bias on this object.
2654 btst(markOopDesc::biased_lock_mask_in_place, temp_reg);
2655 brx(Assembler::notZero, false, Assembler::pn, try_revoke_bias);
2657 // Biasing is still enabled for this data type. See whether the
2658 // epoch of the current bias is still valid, meaning that the epoch
2659 // bits of the mark word are equal to the epoch bits of the
2660 // prototype header. (Note that the prototype header's epoch bits
2661 // only change at a safepoint.) If not, attempt to rebias the object
2662 // toward the current thread. Note that we must be absolutely sure
2663 // that the current epoch is invalid in order to do this because
2664 // otherwise the manipulations it performs on the mark word are
2665 // illegal.
2666 delayed()->btst(markOopDesc::epoch_mask_in_place, temp_reg);
2667 brx(Assembler::notZero, false, Assembler::pn, try_rebias);
2669 // The epoch of the current bias is still valid but we know nothing
2670 // about the owner; it might be set or it might be clear. Try to
2671 // acquire the bias of the object using an atomic operation. If this
2672 // fails we will go in to the runtime to revoke the object's bias.
2673 // Note that we first construct the presumed unbiased header so we
2674 // don't accidentally blow away another thread's valid bias.
2675 delayed()->and3(mark_reg,
2676 markOopDesc::biased_lock_mask_in_place | markOopDesc::age_mask_in_place | markOopDesc::epoch_mask_in_place,
2677 mark_reg);
2678 or3(G2_thread, mark_reg, temp_reg);
2679 casx_under_lock(mark_addr.base(), mark_reg, temp_reg,
2680 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr());
2681 // If the biasing toward our thread failed, this means that
2682 // another thread succeeded in biasing it toward itself and we
2683 // need to revoke that bias. The revocation will occur in the
2684 // interpreter runtime in the slow case.
2685 cmp(mark_reg, temp_reg);
2686 if (counters != NULL) {
2687 cond_inc(Assembler::zero, (address) counters->anonymously_biased_lock_entry_count_addr(), mark_reg, temp_reg);
2688 }
2689 if (slow_case != NULL) {
2690 brx(Assembler::notEqual, true, Assembler::pn, *slow_case);
2691 delayed()->nop();
2692 }
2693 br(Assembler::always, false, Assembler::pt, done);
2694 delayed()->nop();
2696 bind(try_rebias);
2697 // At this point we know the epoch has expired, meaning that the
2698 // current "bias owner", if any, is actually invalid. Under these
2699 // circumstances _only_, we are allowed to use the current header's
2700 // value as the comparison value when doing the cas to acquire the
2701 // bias in the current epoch. In other words, we allow transfer of
2702 // the bias from one thread to another directly in this situation.
2703 //
2704 // FIXME: due to a lack of registers we currently blow away the age
2705 // bits in this situation. Should attempt to preserve them.
2706 load_klass(obj_reg, temp_reg);
2707 ld_ptr(Address(temp_reg, 0, Klass::prototype_header_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes()), temp_reg);
2708 or3(G2_thread, temp_reg, temp_reg);
2709 casx_under_lock(mark_addr.base(), mark_reg, temp_reg,
2710 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr());
2711 // If the biasing toward our thread failed, this means that
2712 // another thread succeeded in biasing it toward itself and we
2713 // need to revoke that bias. The revocation will occur in the
2714 // interpreter runtime in the slow case.
2715 cmp(mark_reg, temp_reg);
2716 if (counters != NULL) {
2717 cond_inc(Assembler::zero, (address) counters->rebiased_lock_entry_count_addr(), mark_reg, temp_reg);
2718 }
2719 if (slow_case != NULL) {
2720 brx(Assembler::notEqual, true, Assembler::pn, *slow_case);
2721 delayed()->nop();
2722 }
2723 br(Assembler::always, false, Assembler::pt, done);
2724 delayed()->nop();
2726 bind(try_revoke_bias);
2727 // The prototype mark in the klass doesn't have the bias bit set any
2728 // more, indicating that objects of this data type are not supposed
2729 // to be biased any more. We are going to try to reset the mark of
2730 // this object to the prototype value and fall through to the
2731 // CAS-based locking scheme. Note that if our CAS fails, it means
2732 // that another thread raced us for the privilege of revoking the
2733 // bias of this particular object, so it's okay to continue in the
2734 // normal locking code.
2735 //
2736 // FIXME: due to a lack of registers we currently blow away the age
2737 // bits in this situation. Should attempt to preserve them.
2738 load_klass(obj_reg, temp_reg);
2739 ld_ptr(Address(temp_reg, 0, Klass::prototype_header_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes()), temp_reg);
2740 casx_under_lock(mark_addr.base(), mark_reg, temp_reg,
2741 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr());
2742 // Fall through to the normal CAS-based lock, because no matter what
2743 // the result of the above CAS, some thread must have succeeded in
2744 // removing the bias bit from the object's header.
2745 if (counters != NULL) {
2746 cmp(mark_reg, temp_reg);
2747 cond_inc(Assembler::zero, (address) counters->revoked_lock_entry_count_addr(), mark_reg, temp_reg);
2748 }
2750 bind(cas_label);
2751 }
2753 void MacroAssembler::biased_locking_exit (Address mark_addr, Register temp_reg, Label& done,
2754 bool allow_delay_slot_filling) {
2755 // Check for biased locking unlock case, which is a no-op
2756 // Note: we do not have to check the thread ID for two reasons.
2757 // First, the interpreter checks for IllegalMonitorStateException at
2758 // a higher level. Second, if the bias was revoked while we held the
2759 // lock, the object could not be rebiased toward another thread, so
2760 // the bias bit would be clear.
2761 ld_ptr(mark_addr, temp_reg);
2762 and3(temp_reg, markOopDesc::biased_lock_mask_in_place, temp_reg);
2763 cmp(temp_reg, markOopDesc::biased_lock_pattern);
2764 brx(Assembler::equal, allow_delay_slot_filling, Assembler::pt, done);
2765 delayed();
2766 if (!allow_delay_slot_filling) {
2767 nop();
2768 }
2769 }
2772 // CASN -- 32-64 bit switch hitter similar to the synthetic CASN provided by
2773 // Solaris/SPARC's "as". Another apt name would be cas_ptr()
2775 void MacroAssembler::casn (Register addr_reg, Register cmp_reg, Register set_reg ) {
2776 casx_under_lock (addr_reg, cmp_reg, set_reg, (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr()) ;
2777 }
2781 // compiler_lock_object() and compiler_unlock_object() are direct transliterations
2782 // of i486.ad fast_lock() and fast_unlock(). See those methods for detailed comments.
2783 // The code could be tightened up considerably.
2784 //
2785 // box->dhw disposition - post-conditions at DONE_LABEL.
2786 // - Successful inflated lock: box->dhw != 0.
2787 // Any non-zero value suffices.
2788 // Consider G2_thread, rsp, boxReg, or unused_mark()
2789 // - Successful Stack-lock: box->dhw == mark.
2790 // box->dhw must contain the displaced mark word value
2791 // - Failure -- icc.ZFlag == 0 and box->dhw is undefined.
2792 // The slow-path fast_enter() and slow_enter() operators
2793 // are responsible for setting box->dhw = NonZero (typically ::unused_mark).
2794 // - Biased: box->dhw is undefined
2795 //
2796 // SPARC refworkload performance - specifically jetstream and scimark - are
2797 // extremely sensitive to the size of the code emitted by compiler_lock_object
2798 // and compiler_unlock_object. Critically, the key factor is code size, not path
2799 // length. (Simply experiments to pad CLO with unexecuted NOPs demonstrte the
2800 // effect).
2803 void MacroAssembler::compiler_lock_object(Register Roop, Register Rmark, Register Rbox, Register Rscratch,
2804 BiasedLockingCounters* counters) {
2805 Address mark_addr(Roop, 0, oopDesc::mark_offset_in_bytes());
2807 verify_oop(Roop);
2808 Label done ;
2810 if (counters != NULL) {
2811 inc_counter((address) counters->total_entry_count_addr(), Rmark, Rscratch);
2812 }
2814 if (EmitSync & 1) {
2815 mov (3, Rscratch) ;
2816 st_ptr (Rscratch, Rbox, BasicLock::displaced_header_offset_in_bytes());
2817 cmp (SP, G0) ;
2818 return ;
2819 }
2821 if (EmitSync & 2) {
2823 // Fetch object's markword
2824 ld_ptr(mark_addr, Rmark);
2826 if (UseBiasedLocking) {
2827 biased_locking_enter(Roop, Rmark, Rscratch, done, NULL, counters);
2828 }
2830 // Save Rbox in Rscratch to be used for the cas operation
2831 mov(Rbox, Rscratch);
2833 // set Rmark to markOop | markOopDesc::unlocked_value
2834 or3(Rmark, markOopDesc::unlocked_value, Rmark);
2836 // Initialize the box. (Must happen before we update the object mark!)
2837 st_ptr(Rmark, Rbox, BasicLock::displaced_header_offset_in_bytes());
2839 // compare object markOop with Rmark and if equal exchange Rscratch with object markOop
2840 assert(mark_addr.disp() == 0, "cas must take a zero displacement");
2841 casx_under_lock(mark_addr.base(), Rmark, Rscratch,
2842 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr());
2844 // if compare/exchange succeeded we found an unlocked object and we now have locked it
2845 // hence we are done
2846 cmp(Rmark, Rscratch);
2847 #ifdef _LP64
2848 sub(Rscratch, STACK_BIAS, Rscratch);
2849 #endif
2850 brx(Assembler::equal, false, Assembler::pt, done);
2851 delayed()->sub(Rscratch, SP, Rscratch); //pull next instruction into delay slot
2853 // we did not find an unlocked object so see if this is a recursive case
2854 // sub(Rscratch, SP, Rscratch);
2855 assert(os::vm_page_size() > 0xfff, "page size too small - change the constant");
2856 andcc(Rscratch, 0xfffff003, Rscratch);
2857 st_ptr(Rscratch, Rbox, BasicLock::displaced_header_offset_in_bytes());
2858 bind (done) ;
2859 return ;
2860 }
2862 Label Egress ;
2864 if (EmitSync & 256) {
2865 Label IsInflated ;
2867 ld_ptr (mark_addr, Rmark); // fetch obj->mark
2868 // Triage: biased, stack-locked, neutral, inflated
2869 if (UseBiasedLocking) {
2870 biased_locking_enter(Roop, Rmark, Rscratch, done, NULL, counters);
2871 // Invariant: if control reaches this point in the emitted stream
2872 // then Rmark has not been modified.
2873 }
2875 // Store mark into displaced mark field in the on-stack basic-lock "box"
2876 // Critically, this must happen before the CAS
2877 // Maximize the ST-CAS distance to minimize the ST-before-CAS penalty.
2878 st_ptr (Rmark, Rbox, BasicLock::displaced_header_offset_in_bytes());
2879 andcc (Rmark, 2, G0) ;
2880 brx (Assembler::notZero, false, Assembler::pn, IsInflated) ;
2881 delayed() ->
2883 // Try stack-lock acquisition.
2884 // Beware: the 1st instruction is in a delay slot
2885 mov (Rbox, Rscratch);
2886 or3 (Rmark, markOopDesc::unlocked_value, Rmark);
2887 assert (mark_addr.disp() == 0, "cas must take a zero displacement");
2888 casn (mark_addr.base(), Rmark, Rscratch) ;
2889 cmp (Rmark, Rscratch);
2890 brx (Assembler::equal, false, Assembler::pt, done);
2891 delayed()->sub(Rscratch, SP, Rscratch);
2893 // Stack-lock attempt failed - check for recursive stack-lock.
2894 // See the comments below about how we might remove this case.
2895 #ifdef _LP64
2896 sub (Rscratch, STACK_BIAS, Rscratch);
2897 #endif
2898 assert(os::vm_page_size() > 0xfff, "page size too small - change the constant");
2899 andcc (Rscratch, 0xfffff003, Rscratch);
2900 br (Assembler::always, false, Assembler::pt, done) ;
2901 delayed()-> st_ptr (Rscratch, Rbox, BasicLock::displaced_header_offset_in_bytes());
2903 bind (IsInflated) ;
2904 if (EmitSync & 64) {
2905 // If m->owner != null goto IsLocked
2906 // Pessimistic form: Test-and-CAS vs CAS
2907 // The optimistic form avoids RTS->RTO cache line upgrades.
2908 ld_ptr (Address (Rmark, 0, ObjectMonitor::owner_offset_in_bytes()-2), Rscratch) ;
2909 andcc (Rscratch, Rscratch, G0) ;
2910 brx (Assembler::notZero, false, Assembler::pn, done) ;
2911 delayed()->nop() ;
2912 // m->owner == null : it's unlocked.
2913 }
2915 // Try to CAS m->owner from null to Self
2916 // Invariant: if we acquire the lock then _recursions should be 0.
2917 add (Rmark, ObjectMonitor::owner_offset_in_bytes()-2, Rmark) ;
2918 mov (G2_thread, Rscratch) ;
2919 casn (Rmark, G0, Rscratch) ;
2920 cmp (Rscratch, G0) ;
2921 // Intentional fall-through into done
2922 } else {
2923 // Aggressively avoid the Store-before-CAS penalty
2924 // Defer the store into box->dhw until after the CAS
2925 Label IsInflated, Recursive ;
2927 // Anticipate CAS -- Avoid RTS->RTO upgrade
2928 // prefetch (mark_addr, Assembler::severalWritesAndPossiblyReads) ;
2930 ld_ptr (mark_addr, Rmark); // fetch obj->mark
2931 // Triage: biased, stack-locked, neutral, inflated
2933 if (UseBiasedLocking) {
2934 biased_locking_enter(Roop, Rmark, Rscratch, done, NULL, counters);
2935 // Invariant: if control reaches this point in the emitted stream
2936 // then Rmark has not been modified.
2937 }
2938 andcc (Rmark, 2, G0) ;
2939 brx (Assembler::notZero, false, Assembler::pn, IsInflated) ;
2940 delayed()-> // Beware - dangling delay-slot
2942 // Try stack-lock acquisition.
2943 // Transiently install BUSY (0) encoding in the mark word.
2944 // if the CAS of 0 into the mark was successful then we execute:
2945 // ST box->dhw = mark -- save fetched mark in on-stack basiclock box
2946 // ST obj->mark = box -- overwrite transient 0 value
2947 // This presumes TSO, of course.
2949 mov (0, Rscratch) ;
2950 or3 (Rmark, markOopDesc::unlocked_value, Rmark);
2951 assert (mark_addr.disp() == 0, "cas must take a zero displacement");
2952 casn (mark_addr.base(), Rmark, Rscratch) ;
2953 // prefetch (mark_addr, Assembler::severalWritesAndPossiblyReads) ;
2954 cmp (Rscratch, Rmark) ;
2955 brx (Assembler::notZero, false, Assembler::pn, Recursive) ;
2956 delayed() ->
2957 st_ptr (Rmark, Rbox, BasicLock::displaced_header_offset_in_bytes());
2958 if (counters != NULL) {
2959 cond_inc(Assembler::equal, (address) counters->fast_path_entry_count_addr(), Rmark, Rscratch);
2960 }
2961 br (Assembler::always, false, Assembler::pt, done);
2962 delayed() ->
2963 st_ptr (Rbox, mark_addr) ;
2965 bind (Recursive) ;
2966 // Stack-lock attempt failed - check for recursive stack-lock.
2967 // Tests show that we can remove the recursive case with no impact
2968 // on refworkload 0.83. If we need to reduce the size of the code
2969 // emitted by compiler_lock_object() the recursive case is perfect
2970 // candidate.
2971 //
2972 // A more extreme idea is to always inflate on stack-lock recursion.
2973 // This lets us eliminate the recursive checks in compiler_lock_object
2974 // and compiler_unlock_object and the (box->dhw == 0) encoding.
2975 // A brief experiment - requiring changes to synchronizer.cpp, interpreter,
2976 // and showed a performance *increase*. In the same experiment I eliminated
2977 // the fast-path stack-lock code from the interpreter and always passed
2978 // control to the "slow" operators in synchronizer.cpp.
2980 // RScratch contains the fetched obj->mark value from the failed CASN.
2981 #ifdef _LP64
2982 sub (Rscratch, STACK_BIAS, Rscratch);
2983 #endif
2984 sub(Rscratch, SP, Rscratch);
2985 assert(os::vm_page_size() > 0xfff, "page size too small - change the constant");
2986 andcc (Rscratch, 0xfffff003, Rscratch);
2987 if (counters != NULL) {
2988 // Accounting needs the Rscratch register
2989 st_ptr (Rscratch, Rbox, BasicLock::displaced_header_offset_in_bytes());
2990 cond_inc(Assembler::equal, (address) counters->fast_path_entry_count_addr(), Rmark, Rscratch);
2991 br (Assembler::always, false, Assembler::pt, done) ;
2992 delayed()->nop() ;
2993 } else {
2994 br (Assembler::always, false, Assembler::pt, done) ;
2995 delayed()-> st_ptr (Rscratch, Rbox, BasicLock::displaced_header_offset_in_bytes());
2996 }
2998 bind (IsInflated) ;
2999 if (EmitSync & 64) {
3000 // If m->owner != null goto IsLocked
3001 // Test-and-CAS vs CAS
3002 // Pessimistic form avoids futile (doomed) CAS attempts
3003 // The optimistic form avoids RTS->RTO cache line upgrades.
3004 ld_ptr (Address (Rmark, 0, ObjectMonitor::owner_offset_in_bytes()-2), Rscratch) ;
3005 andcc (Rscratch, Rscratch, G0) ;
3006 brx (Assembler::notZero, false, Assembler::pn, done) ;
3007 delayed()->nop() ;
3008 // m->owner == null : it's unlocked.
3009 }
3011 // Try to CAS m->owner from null to Self
3012 // Invariant: if we acquire the lock then _recursions should be 0.
3013 add (Rmark, ObjectMonitor::owner_offset_in_bytes()-2, Rmark) ;
3014 mov (G2_thread, Rscratch) ;
3015 casn (Rmark, G0, Rscratch) ;
3016 cmp (Rscratch, G0) ;
3017 // ST box->displaced_header = NonZero.
3018 // Any non-zero value suffices:
3019 // unused_mark(), G2_thread, RBox, RScratch, rsp, etc.
3020 st_ptr (Rbox, Rbox, BasicLock::displaced_header_offset_in_bytes());
3021 // Intentional fall-through into done
3022 }
3024 bind (done) ;
3025 }
3027 void MacroAssembler::compiler_unlock_object(Register Roop, Register Rmark, Register Rbox, Register Rscratch) {
3028 Address mark_addr(Roop, 0, oopDesc::mark_offset_in_bytes());
3030 Label done ;
3032 if (EmitSync & 4) {
3033 cmp (SP, G0) ;
3034 return ;
3035 }
3037 if (EmitSync & 8) {
3038 if (UseBiasedLocking) {
3039 biased_locking_exit(mark_addr, Rscratch, done);
3040 }
3042 // Test first if it is a fast recursive unlock
3043 ld_ptr(Rbox, BasicLock::displaced_header_offset_in_bytes(), Rmark);
3044 cmp(Rmark, G0);
3045 brx(Assembler::equal, false, Assembler::pt, done);
3046 delayed()->nop();
3048 // Check if it is still a light weight lock, this is is true if we see
3049 // the stack address of the basicLock in the markOop of the object
3050 assert(mark_addr.disp() == 0, "cas must take a zero displacement");
3051 casx_under_lock(mark_addr.base(), Rbox, Rmark,
3052 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr());
3053 br (Assembler::always, false, Assembler::pt, done);
3054 delayed()->cmp(Rbox, Rmark);
3055 bind (done) ;
3056 return ;
3057 }
3059 // Beware ... If the aggregate size of the code emitted by CLO and CUO is
3060 // is too large performance rolls abruptly off a cliff.
3061 // This could be related to inlining policies, code cache management, or
3062 // I$ effects.
3063 Label LStacked ;
3065 if (UseBiasedLocking) {
3066 // TODO: eliminate redundant LDs of obj->mark
3067 biased_locking_exit(mark_addr, Rscratch, done);
3068 }
3070 ld_ptr (Roop, oopDesc::mark_offset_in_bytes(), Rmark) ;
3071 ld_ptr (Rbox, BasicLock::displaced_header_offset_in_bytes(), Rscratch);
3072 andcc (Rscratch, Rscratch, G0);
3073 brx (Assembler::zero, false, Assembler::pn, done);
3074 delayed()-> nop() ; // consider: relocate fetch of mark, above, into this DS
3075 andcc (Rmark, 2, G0) ;
3076 brx (Assembler::zero, false, Assembler::pt, LStacked) ;
3077 delayed()-> nop() ;
3079 // It's inflated
3080 // Conceptually we need a #loadstore|#storestore "release" MEMBAR before
3081 // the ST of 0 into _owner which releases the lock. This prevents loads
3082 // and stores within the critical section from reordering (floating)
3083 // past the store that releases the lock. But TSO is a strong memory model
3084 // and that particular flavor of barrier is a noop, so we can safely elide it.
3085 // Note that we use 1-0 locking by default for the inflated case. We
3086 // close the resultant (and rare) race by having contented threads in
3087 // monitorenter periodically poll _owner.
3088 ld_ptr (Address(Rmark, 0, ObjectMonitor::owner_offset_in_bytes()-2), Rscratch) ;
3089 ld_ptr (Address(Rmark, 0, ObjectMonitor::recursions_offset_in_bytes()-2), Rbox) ;
3090 xor3 (Rscratch, G2_thread, Rscratch) ;
3091 orcc (Rbox, Rscratch, Rbox) ;
3092 brx (Assembler::notZero, false, Assembler::pn, done) ;
3093 delayed()->
3094 ld_ptr (Address (Rmark, 0, ObjectMonitor::EntryList_offset_in_bytes()-2), Rscratch) ;
3095 ld_ptr (Address (Rmark, 0, ObjectMonitor::cxq_offset_in_bytes()-2), Rbox) ;
3096 orcc (Rbox, Rscratch, G0) ;
3097 if (EmitSync & 65536) {
3098 Label LSucc ;
3099 brx (Assembler::notZero, false, Assembler::pn, LSucc) ;
3100 delayed()->nop() ;
3101 br (Assembler::always, false, Assembler::pt, done) ;
3102 delayed()->
3103 st_ptr (G0, Address (Rmark, 0, ObjectMonitor::owner_offset_in_bytes()-2)) ;
3105 bind (LSucc) ;
3106 st_ptr (G0, Address (Rmark, 0, ObjectMonitor::owner_offset_in_bytes()-2)) ;
3107 if (os::is_MP()) { membar (StoreLoad) ; }
3108 ld_ptr (Address (Rmark, 0, ObjectMonitor::succ_offset_in_bytes()-2), Rscratch) ;
3109 andcc (Rscratch, Rscratch, G0) ;
3110 brx (Assembler::notZero, false, Assembler::pt, done) ;
3111 delayed()-> andcc (G0, G0, G0) ;
3112 add (Rmark, ObjectMonitor::owner_offset_in_bytes()-2, Rmark) ;
3113 mov (G2_thread, Rscratch) ;
3114 casn (Rmark, G0, Rscratch) ;
3115 cmp (Rscratch, G0) ;
3116 // invert icc.zf and goto done
3117 brx (Assembler::notZero, false, Assembler::pt, done) ;
3118 delayed() -> cmp (G0, G0) ;
3119 br (Assembler::always, false, Assembler::pt, done);
3120 delayed() -> cmp (G0, 1) ;
3121 } else {
3122 brx (Assembler::notZero, false, Assembler::pn, done) ;
3123 delayed()->nop() ;
3124 br (Assembler::always, false, Assembler::pt, done) ;
3125 delayed()->
3126 st_ptr (G0, Address (Rmark, 0, ObjectMonitor::owner_offset_in_bytes()-2)) ;
3127 }
3129 bind (LStacked) ;
3130 // Consider: we could replace the expensive CAS in the exit
3131 // path with a simple ST of the displaced mark value fetched from
3132 // the on-stack basiclock box. That admits a race where a thread T2
3133 // in the slow lock path -- inflating with monitor M -- could race a
3134 // thread T1 in the fast unlock path, resulting in a missed wakeup for T2.
3135 // More precisely T1 in the stack-lock unlock path could "stomp" the
3136 // inflated mark value M installed by T2, resulting in an orphan
3137 // object monitor M and T2 becoming stranded. We can remedy that situation
3138 // by having T2 periodically poll the object's mark word using timed wait
3139 // operations. If T2 discovers that a stomp has occurred it vacates
3140 // the monitor M and wakes any other threads stranded on the now-orphan M.
3141 // In addition the monitor scavenger, which performs deflation,
3142 // would also need to check for orpan monitors and stranded threads.
3143 //
3144 // Finally, inflation is also used when T2 needs to assign a hashCode
3145 // to O and O is stack-locked by T1. The "stomp" race could cause
3146 // an assigned hashCode value to be lost. We can avoid that condition
3147 // and provide the necessary hashCode stability invariants by ensuring
3148 // that hashCode generation is idempotent between copying GCs.
3149 // For example we could compute the hashCode of an object O as
3150 // O's heap address XOR some high quality RNG value that is refreshed
3151 // at GC-time. The monitor scavenger would install the hashCode
3152 // found in any orphan monitors. Again, the mechanism admits a
3153 // lost-update "stomp" WAW race but detects and recovers as needed.
3154 //
3155 // A prototype implementation showed excellent results, although
3156 // the scavenger and timeout code was rather involved.
3158 casn (mark_addr.base(), Rbox, Rscratch) ;
3159 cmp (Rbox, Rscratch);
3160 // Intentional fall through into done ...
3162 bind (done) ;
3163 }
3167 void MacroAssembler::print_CPU_state() {
3168 // %%%%% need to implement this
3169 }
3171 void MacroAssembler::verify_FPU(int stack_depth, const char* s) {
3172 // %%%%% need to implement this
3173 }
3175 void MacroAssembler::push_IU_state() {
3176 // %%%%% need to implement this
3177 }
3180 void MacroAssembler::pop_IU_state() {
3181 // %%%%% need to implement this
3182 }
3185 void MacroAssembler::push_FPU_state() {
3186 // %%%%% need to implement this
3187 }
3190 void MacroAssembler::pop_FPU_state() {
3191 // %%%%% need to implement this
3192 }
3195 void MacroAssembler::push_CPU_state() {
3196 // %%%%% need to implement this
3197 }
3200 void MacroAssembler::pop_CPU_state() {
3201 // %%%%% need to implement this
3202 }
3206 void MacroAssembler::verify_tlab() {
3207 #ifdef ASSERT
3208 if (UseTLAB && VerifyOops) {
3209 Label next, next2, ok;
3210 Register t1 = L0;
3211 Register t2 = L1;
3212 Register t3 = L2;
3214 save_frame(0);
3215 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_top_offset()), t1);
3216 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_start_offset()), t2);
3217 or3(t1, t2, t3);
3218 cmp(t1, t2);
3219 br(Assembler::greaterEqual, false, Assembler::pn, next);
3220 delayed()->nop();
3221 stop("assert(top >= start)");
3222 should_not_reach_here();
3224 bind(next);
3225 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_top_offset()), t1);
3226 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_end_offset()), t2);
3227 or3(t3, t2, t3);
3228 cmp(t1, t2);
3229 br(Assembler::lessEqual, false, Assembler::pn, next2);
3230 delayed()->nop();
3231 stop("assert(top <= end)");
3232 should_not_reach_here();
3234 bind(next2);
3235 and3(t3, MinObjAlignmentInBytesMask, t3);
3236 cmp(t3, 0);
3237 br(Assembler::lessEqual, false, Assembler::pn, ok);
3238 delayed()->nop();
3239 stop("assert(aligned)");
3240 should_not_reach_here();
3242 bind(ok);
3243 restore();
3244 }
3245 #endif
3246 }
3249 void MacroAssembler::eden_allocate(
3250 Register obj, // result: pointer to object after successful allocation
3251 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
3252 int con_size_in_bytes, // object size in bytes if known at compile time
3253 Register t1, // temp register
3254 Register t2, // temp register
3255 Label& slow_case // continuation point if fast allocation fails
3256 ){
3257 // make sure arguments make sense
3258 assert_different_registers(obj, var_size_in_bytes, t1, t2);
3259 assert(0 <= con_size_in_bytes && Assembler::is_simm13(con_size_in_bytes), "illegal object size");
3260 assert((con_size_in_bytes & MinObjAlignmentInBytesMask) == 0, "object size is not multiple of alignment");
3262 if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) {
3263 // No allocation in the shared eden.
3264 br(Assembler::always, false, Assembler::pt, slow_case);
3265 delayed()->nop();
3266 } else {
3267 // get eden boundaries
3268 // note: we need both top & top_addr!
3269 const Register top_addr = t1;
3270 const Register end = t2;
3272 CollectedHeap* ch = Universe::heap();
3273 set((intx)ch->top_addr(), top_addr);
3274 intx delta = (intx)ch->end_addr() - (intx)ch->top_addr();
3275 ld_ptr(top_addr, delta, end);
3276 ld_ptr(top_addr, 0, obj);
3278 // try to allocate
3279 Label retry;
3280 bind(retry);
3281 #ifdef ASSERT
3282 // make sure eden top is properly aligned
3283 {
3284 Label L;
3285 btst(MinObjAlignmentInBytesMask, obj);
3286 br(Assembler::zero, false, Assembler::pt, L);
3287 delayed()->nop();
3288 stop("eden top is not properly aligned");
3289 bind(L);
3290 }
3291 #endif // ASSERT
3292 const Register free = end;
3293 sub(end, obj, free); // compute amount of free space
3294 if (var_size_in_bytes->is_valid()) {
3295 // size is unknown at compile time
3296 cmp(free, var_size_in_bytes);
3297 br(Assembler::lessUnsigned, false, Assembler::pn, slow_case); // if there is not enough space go the slow case
3298 delayed()->add(obj, var_size_in_bytes, end);
3299 } else {
3300 // size is known at compile time
3301 cmp(free, con_size_in_bytes);
3302 br(Assembler::lessUnsigned, false, Assembler::pn, slow_case); // if there is not enough space go the slow case
3303 delayed()->add(obj, con_size_in_bytes, end);
3304 }
3305 // Compare obj with the value at top_addr; if still equal, swap the value of
3306 // end with the value at top_addr. If not equal, read the value at top_addr
3307 // into end.
3308 casx_under_lock(top_addr, obj, end, (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr());
3309 // if someone beat us on the allocation, try again, otherwise continue
3310 cmp(obj, end);
3311 brx(Assembler::notEqual, false, Assembler::pn, retry);
3312 delayed()->mov(end, obj); // nop if successfull since obj == end
3314 #ifdef ASSERT
3315 // make sure eden top is properly aligned
3316 {
3317 Label L;
3318 const Register top_addr = t1;
3320 set((intx)ch->top_addr(), top_addr);
3321 ld_ptr(top_addr, 0, top_addr);
3322 btst(MinObjAlignmentInBytesMask, top_addr);
3323 br(Assembler::zero, false, Assembler::pt, L);
3324 delayed()->nop();
3325 stop("eden top is not properly aligned");
3326 bind(L);
3327 }
3328 #endif // ASSERT
3329 }
3330 }
3333 void MacroAssembler::tlab_allocate(
3334 Register obj, // result: pointer to object after successful allocation
3335 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
3336 int con_size_in_bytes, // object size in bytes if known at compile time
3337 Register t1, // temp register
3338 Label& slow_case // continuation point if fast allocation fails
3339 ){
3340 // make sure arguments make sense
3341 assert_different_registers(obj, var_size_in_bytes, t1);
3342 assert(0 <= con_size_in_bytes && is_simm13(con_size_in_bytes), "illegal object size");
3343 assert((con_size_in_bytes & MinObjAlignmentInBytesMask) == 0, "object size is not multiple of alignment");
3345 const Register free = t1;
3347 verify_tlab();
3349 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_top_offset()), obj);
3351 // calculate amount of free space
3352 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_end_offset()), free);
3353 sub(free, obj, free);
3355 Label done;
3356 if (var_size_in_bytes == noreg) {
3357 cmp(free, con_size_in_bytes);
3358 } else {
3359 cmp(free, var_size_in_bytes);
3360 }
3361 br(Assembler::less, false, Assembler::pn, slow_case);
3362 // calculate the new top pointer
3363 if (var_size_in_bytes == noreg) {
3364 delayed()->add(obj, con_size_in_bytes, free);
3365 } else {
3366 delayed()->add(obj, var_size_in_bytes, free);
3367 }
3369 bind(done);
3371 #ifdef ASSERT
3372 // make sure new free pointer is properly aligned
3373 {
3374 Label L;
3375 btst(MinObjAlignmentInBytesMask, free);
3376 br(Assembler::zero, false, Assembler::pt, L);
3377 delayed()->nop();
3378 stop("updated TLAB free is not properly aligned");
3379 bind(L);
3380 }
3381 #endif // ASSERT
3383 // update the tlab top pointer
3384 st_ptr(free, G2_thread, in_bytes(JavaThread::tlab_top_offset()));
3385 verify_tlab();
3386 }
3389 void MacroAssembler::tlab_refill(Label& retry, Label& try_eden, Label& slow_case) {
3390 Register top = O0;
3391 Register t1 = G1;
3392 Register t2 = G3;
3393 Register t3 = O1;
3394 assert_different_registers(top, t1, t2, t3, G4, G5 /* preserve G4 and G5 */);
3395 Label do_refill, discard_tlab;
3397 if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) {
3398 // No allocation in the shared eden.
3399 br(Assembler::always, false, Assembler::pt, slow_case);
3400 delayed()->nop();
3401 }
3403 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_top_offset()), top);
3404 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_end_offset()), t1);
3405 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_refill_waste_limit_offset()), t2);
3407 // calculate amount of free space
3408 sub(t1, top, t1);
3409 srl_ptr(t1, LogHeapWordSize, t1);
3411 // Retain tlab and allocate object in shared space if
3412 // the amount free in the tlab is too large to discard.
3413 cmp(t1, t2);
3414 brx(Assembler::lessEqual, false, Assembler::pt, discard_tlab);
3416 // increment waste limit to prevent getting stuck on this slow path
3417 delayed()->add(t2, ThreadLocalAllocBuffer::refill_waste_limit_increment(), t2);
3418 st_ptr(t2, G2_thread, in_bytes(JavaThread::tlab_refill_waste_limit_offset()));
3419 if (TLABStats) {
3420 // increment number of slow_allocations
3421 ld(G2_thread, in_bytes(JavaThread::tlab_slow_allocations_offset()), t2);
3422 add(t2, 1, t2);
3423 stw(t2, G2_thread, in_bytes(JavaThread::tlab_slow_allocations_offset()));
3424 }
3425 br(Assembler::always, false, Assembler::pt, try_eden);
3426 delayed()->nop();
3428 bind(discard_tlab);
3429 if (TLABStats) {
3430 // increment number of refills
3431 ld(G2_thread, in_bytes(JavaThread::tlab_number_of_refills_offset()), t2);
3432 add(t2, 1, t2);
3433 stw(t2, G2_thread, in_bytes(JavaThread::tlab_number_of_refills_offset()));
3434 // accumulate wastage
3435 ld(G2_thread, in_bytes(JavaThread::tlab_fast_refill_waste_offset()), t2);
3436 add(t2, t1, t2);
3437 stw(t2, G2_thread, in_bytes(JavaThread::tlab_fast_refill_waste_offset()));
3438 }
3440 // if tlab is currently allocated (top or end != null) then
3441 // fill [top, end + alignment_reserve) with array object
3442 br_null(top, false, Assembler::pn, do_refill);
3443 delayed()->nop();
3445 set((intptr_t)markOopDesc::prototype()->copy_set_hash(0x2), t2);
3446 st_ptr(t2, top, oopDesc::mark_offset_in_bytes()); // set up the mark word
3447 // set klass to intArrayKlass
3448 set((intptr_t)Universe::intArrayKlassObj_addr(), t2);
3449 ld_ptr(t2, 0, t2);
3450 store_klass(t2, top);
3451 sub(t1, typeArrayOopDesc::header_size(T_INT), t1);
3452 add(t1, ThreadLocalAllocBuffer::alignment_reserve(), t1);
3453 sll_ptr(t1, log2_intptr(HeapWordSize/sizeof(jint)), t1);
3454 st(t1, top, arrayOopDesc::length_offset_in_bytes());
3455 verify_oop(top);
3457 // refill the tlab with an eden allocation
3458 bind(do_refill);
3459 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_size_offset()), t1);
3460 sll_ptr(t1, LogHeapWordSize, t1);
3461 // add object_size ??
3462 eden_allocate(top, t1, 0, t2, t3, slow_case);
3464 st_ptr(top, G2_thread, in_bytes(JavaThread::tlab_start_offset()));
3465 st_ptr(top, G2_thread, in_bytes(JavaThread::tlab_top_offset()));
3466 #ifdef ASSERT
3467 // check that tlab_size (t1) is still valid
3468 {
3469 Label ok;
3470 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_size_offset()), t2);
3471 sll_ptr(t2, LogHeapWordSize, t2);
3472 cmp(t1, t2);
3473 br(Assembler::equal, false, Assembler::pt, ok);
3474 delayed()->nop();
3475 stop("assert(t1 == tlab_size)");
3476 should_not_reach_here();
3478 bind(ok);
3479 }
3480 #endif // ASSERT
3481 add(top, t1, top); // t1 is tlab_size
3482 sub(top, ThreadLocalAllocBuffer::alignment_reserve_in_bytes(), top);
3483 st_ptr(top, G2_thread, in_bytes(JavaThread::tlab_end_offset()));
3484 verify_tlab();
3485 br(Assembler::always, false, Assembler::pt, retry);
3486 delayed()->nop();
3487 }
3489 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) {
3490 switch (cond) {
3491 // Note some conditions are synonyms for others
3492 case Assembler::never: return Assembler::always;
3493 case Assembler::zero: return Assembler::notZero;
3494 case Assembler::lessEqual: return Assembler::greater;
3495 case Assembler::less: return Assembler::greaterEqual;
3496 case Assembler::lessEqualUnsigned: return Assembler::greaterUnsigned;
3497 case Assembler::lessUnsigned: return Assembler::greaterEqualUnsigned;
3498 case Assembler::negative: return Assembler::positive;
3499 case Assembler::overflowSet: return Assembler::overflowClear;
3500 case Assembler::always: return Assembler::never;
3501 case Assembler::notZero: return Assembler::zero;
3502 case Assembler::greater: return Assembler::lessEqual;
3503 case Assembler::greaterEqual: return Assembler::less;
3504 case Assembler::greaterUnsigned: return Assembler::lessEqualUnsigned;
3505 case Assembler::greaterEqualUnsigned: return Assembler::lessUnsigned;
3506 case Assembler::positive: return Assembler::negative;
3507 case Assembler::overflowClear: return Assembler::overflowSet;
3508 }
3510 ShouldNotReachHere(); return Assembler::overflowClear;
3511 }
3513 void MacroAssembler::cond_inc(Assembler::Condition cond, address counter_ptr,
3514 Register Rtmp1, Register Rtmp2 /*, Register Rtmp3, Register Rtmp4 */) {
3515 Condition negated_cond = negate_condition(cond);
3516 Label L;
3517 brx(negated_cond, false, Assembler::pt, L);
3518 delayed()->nop();
3519 inc_counter(counter_ptr, Rtmp1, Rtmp2);
3520 bind(L);
3521 }
3523 void MacroAssembler::inc_counter(address counter_ptr, Register Rtmp1, Register Rtmp2) {
3524 Address counter_addr(Rtmp1, counter_ptr);
3525 load_contents(counter_addr, Rtmp2);
3526 inc(Rtmp2);
3527 store_contents(Rtmp2, counter_addr);
3528 }
3530 SkipIfEqual::SkipIfEqual(
3531 MacroAssembler* masm, Register temp, const bool* flag_addr,
3532 Assembler::Condition condition) {
3533 _masm = masm;
3534 Address flag(temp, (address)flag_addr, relocInfo::none);
3535 _masm->sethi(flag);
3536 _masm->ldub(flag, temp);
3537 _masm->tst(temp);
3538 _masm->br(condition, false, Assembler::pt, _label);
3539 _masm->delayed()->nop();
3540 }
3542 SkipIfEqual::~SkipIfEqual() {
3543 _masm->bind(_label);
3544 }
3547 // Writes to stack successive pages until offset reached to check for
3548 // stack overflow + shadow pages. This clobbers tsp and scratch.
3549 void MacroAssembler::bang_stack_size(Register Rsize, Register Rtsp,
3550 Register Rscratch) {
3551 // Use stack pointer in temp stack pointer
3552 mov(SP, Rtsp);
3554 // Bang stack for total size given plus stack shadow page size.
3555 // Bang one page at a time because a large size can overflow yellow and
3556 // red zones (the bang will fail but stack overflow handling can't tell that
3557 // it was a stack overflow bang vs a regular segv).
3558 int offset = os::vm_page_size();
3559 Register Roffset = Rscratch;
3561 Label loop;
3562 bind(loop);
3563 set((-offset)+STACK_BIAS, Rscratch);
3564 st(G0, Rtsp, Rscratch);
3565 set(offset, Roffset);
3566 sub(Rsize, Roffset, Rsize);
3567 cmp(Rsize, G0);
3568 br(Assembler::greater, false, Assembler::pn, loop);
3569 delayed()->sub(Rtsp, Roffset, Rtsp);
3571 // Bang down shadow pages too.
3572 // The -1 because we already subtracted 1 page.
3573 for (int i = 0; i< StackShadowPages-1; i++) {
3574 set((-i*offset)+STACK_BIAS, Rscratch);
3575 st(G0, Rtsp, Rscratch);
3576 }
3577 }
3579 ///////////////////////////////////////////////////////////////////////////////////
3580 #ifndef SERIALGC
3582 static uint num_stores = 0;
3583 static uint num_null_pre_stores = 0;
3585 static void count_null_pre_vals(void* pre_val) {
3586 num_stores++;
3587 if (pre_val == NULL) num_null_pre_stores++;
3588 if ((num_stores % 1000000) == 0) {
3589 tty->print_cr(UINT32_FORMAT " stores, " UINT32_FORMAT " (%5.2f%%) with null pre-vals.",
3590 num_stores, num_null_pre_stores,
3591 100.0*(float)num_null_pre_stores/(float)num_stores);
3592 }
3593 }
3595 static address satb_log_enqueue_with_frame = 0;
3596 static u_char* satb_log_enqueue_with_frame_end = 0;
3598 static address satb_log_enqueue_frameless = 0;
3599 static u_char* satb_log_enqueue_frameless_end = 0;
3601 static int EnqueueCodeSize = 128 DEBUG_ONLY( + 256); // Instructions?
3603 // The calls to this don't work. We'd need to do a fair amount of work to
3604 // make it work.
3605 static void check_index(int ind) {
3606 assert(0 <= ind && ind <= 64*K && ((ind % oopSize) == 0),
3607 "Invariants.")
3608 }
3610 static void generate_satb_log_enqueue(bool with_frame) {
3611 BufferBlob* bb = BufferBlob::create("enqueue_with_frame", EnqueueCodeSize);
3612 CodeBuffer buf(bb->instructions_begin(), bb->instructions_size());
3613 MacroAssembler masm(&buf);
3614 address start = masm.pc();
3615 Register pre_val;
3617 Label refill, restart;
3618 if (with_frame) {
3619 masm.save_frame(0);
3620 pre_val = I0; // Was O0 before the save.
3621 } else {
3622 pre_val = O0;
3623 }
3624 int satb_q_index_byte_offset =
3625 in_bytes(JavaThread::satb_mark_queue_offset() +
3626 PtrQueue::byte_offset_of_index());
3627 int satb_q_buf_byte_offset =
3628 in_bytes(JavaThread::satb_mark_queue_offset() +
3629 PtrQueue::byte_offset_of_buf());
3630 assert(in_bytes(PtrQueue::byte_width_of_index()) == sizeof(intptr_t) &&
3631 in_bytes(PtrQueue::byte_width_of_buf()) == sizeof(intptr_t),
3632 "check sizes in assembly below");
3634 masm.bind(restart);
3635 masm.ld_ptr(G2_thread, satb_q_index_byte_offset, L0);
3637 masm.br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pn, L0, refill);
3638 // If the branch is taken, no harm in executing this in the delay slot.
3639 masm.delayed()->ld_ptr(G2_thread, satb_q_buf_byte_offset, L1);
3640 masm.sub(L0, oopSize, L0);
3642 masm.st_ptr(pre_val, L1, L0); // [_buf + index] := I0
3643 if (!with_frame) {
3644 // Use return-from-leaf
3645 masm.retl();
3646 masm.delayed()->st_ptr(L0, G2_thread, satb_q_index_byte_offset);
3647 } else {
3648 // Not delayed.
3649 masm.st_ptr(L0, G2_thread, satb_q_index_byte_offset);
3650 }
3651 if (with_frame) {
3652 masm.ret();
3653 masm.delayed()->restore();
3654 }
3655 masm.bind(refill);
3657 address handle_zero =
3658 CAST_FROM_FN_PTR(address,
3659 &SATBMarkQueueSet::handle_zero_index_for_thread);
3660 // This should be rare enough that we can afford to save all the
3661 // scratch registers that the calling context might be using.
3662 masm.mov(G1_scratch, L0);
3663 masm.mov(G3_scratch, L1);
3664 masm.mov(G4, L2);
3665 // We need the value of O0 above (for the write into the buffer), so we
3666 // save and restore it.
3667 masm.mov(O0, L3);
3668 // Since the call will overwrite O7, we save and restore that, as well.
3669 masm.mov(O7, L4);
3670 masm.call_VM_leaf(L5, handle_zero, G2_thread);
3671 masm.mov(L0, G1_scratch);
3672 masm.mov(L1, G3_scratch);
3673 masm.mov(L2, G4);
3674 masm.mov(L3, O0);
3675 masm.br(Assembler::always, /*annul*/false, Assembler::pt, restart);
3676 masm.delayed()->mov(L4, O7);
3678 if (with_frame) {
3679 satb_log_enqueue_with_frame = start;
3680 satb_log_enqueue_with_frame_end = masm.pc();
3681 } else {
3682 satb_log_enqueue_frameless = start;
3683 satb_log_enqueue_frameless_end = masm.pc();
3684 }
3685 }
3687 static inline void generate_satb_log_enqueue_if_necessary(bool with_frame) {
3688 if (with_frame) {
3689 if (satb_log_enqueue_with_frame == 0) {
3690 generate_satb_log_enqueue(with_frame);
3691 assert(satb_log_enqueue_with_frame != 0, "postcondition.");
3692 if (G1SATBPrintStubs) {
3693 tty->print_cr("Generated with-frame satb enqueue:");
3694 Disassembler::decode((u_char*)satb_log_enqueue_with_frame,
3695 satb_log_enqueue_with_frame_end,
3696 tty);
3697 }
3698 }
3699 } else {
3700 if (satb_log_enqueue_frameless == 0) {
3701 generate_satb_log_enqueue(with_frame);
3702 assert(satb_log_enqueue_frameless != 0, "postcondition.");
3703 if (G1SATBPrintStubs) {
3704 tty->print_cr("Generated frameless satb enqueue:");
3705 Disassembler::decode((u_char*)satb_log_enqueue_frameless,
3706 satb_log_enqueue_frameless_end,
3707 tty);
3708 }
3709 }
3710 }
3711 }
3713 void MacroAssembler::g1_write_barrier_pre(Register obj, Register index, int offset, Register tmp, bool preserve_o_regs) {
3714 assert(offset == 0 || index == noreg, "choose one");
3716 if (G1DisablePreBarrier) return;
3717 // satb_log_barrier(tmp, obj, offset, preserve_o_regs);
3718 Label filtered;
3719 // satb_log_barrier_work0(tmp, filtered);
3720 if (in_bytes(PtrQueue::byte_width_of_active()) == 4) {
3721 ld(G2,
3722 in_bytes(JavaThread::satb_mark_queue_offset() +
3723 PtrQueue::byte_offset_of_active()),
3724 tmp);
3725 } else {
3726 guarantee(in_bytes(PtrQueue::byte_width_of_active()) == 1,
3727 "Assumption");
3728 ldsb(G2,
3729 in_bytes(JavaThread::satb_mark_queue_offset() +
3730 PtrQueue::byte_offset_of_active()),
3731 tmp);
3732 }
3733 // Check on whether to annul.
3734 br_on_reg_cond(rc_z, /*annul*/false, Assembler::pt, tmp, filtered);
3735 delayed() -> nop();
3737 // satb_log_barrier_work1(tmp, offset);
3738 if (index == noreg) {
3739 if (Assembler::is_simm13(offset)) {
3740 ld_ptr(obj, offset, tmp);
3741 } else {
3742 set(offset, tmp);
3743 ld_ptr(obj, tmp, tmp);
3744 }
3745 } else {
3746 ld_ptr(obj, index, tmp);
3747 }
3749 // satb_log_barrier_work2(obj, tmp, offset);
3751 // satb_log_barrier_work3(tmp, filtered, preserve_o_regs);
3753 const Register pre_val = tmp;
3755 if (G1SATBBarrierPrintNullPreVals) {
3756 save_frame(0);
3757 mov(pre_val, O0);
3758 // Save G-regs that target may use.
3759 mov(G1, L1);
3760 mov(G2, L2);
3761 mov(G3, L3);
3762 mov(G4, L4);
3763 mov(G5, L5);
3764 call(CAST_FROM_FN_PTR(address, &count_null_pre_vals));
3765 delayed()->nop();
3766 // Restore G-regs that target may have used.
3767 mov(L1, G1);
3768 mov(L2, G2);
3769 mov(L3, G3);
3770 mov(L4, G4);
3771 mov(L5, G5);
3772 restore(G0, G0, G0);
3773 }
3775 // Check on whether to annul.
3776 br_on_reg_cond(rc_z, /*annul*/false, Assembler::pt, pre_val, filtered);
3777 delayed() -> nop();
3779 // OK, it's not filtered, so we'll need to call enqueue. In the normal
3780 // case, pre_val will be a scratch G-reg, but there's some cases in which
3781 // it's an O-reg. In the first case, do a normal call. In the latter,
3782 // do a save here and call the frameless version.
3784 guarantee(pre_val->is_global() || pre_val->is_out(),
3785 "Or we need to think harder.");
3786 if (pre_val->is_global() && !preserve_o_regs) {
3787 generate_satb_log_enqueue_if_necessary(true); // with frame.
3788 call(satb_log_enqueue_with_frame);
3789 delayed()->mov(pre_val, O0);
3790 } else {
3791 generate_satb_log_enqueue_if_necessary(false); // with frameless.
3792 save_frame(0);
3793 call(satb_log_enqueue_frameless);
3794 delayed()->mov(pre_val->after_save(), O0);
3795 restore();
3796 }
3798 bind(filtered);
3799 }
3801 static jint num_ct_writes = 0;
3802 static jint num_ct_writes_filtered_in_hr = 0;
3803 static jint num_ct_writes_filtered_null = 0;
3804 static jint num_ct_writes_filtered_pop = 0;
3805 static G1CollectedHeap* g1 = NULL;
3807 static Thread* count_ct_writes(void* filter_val, void* new_val) {
3808 Atomic::inc(&num_ct_writes);
3809 if (filter_val == NULL) {
3810 Atomic::inc(&num_ct_writes_filtered_in_hr);
3811 } else if (new_val == NULL) {
3812 Atomic::inc(&num_ct_writes_filtered_null);
3813 } else {
3814 if (g1 == NULL) {
3815 g1 = G1CollectedHeap::heap();
3816 }
3817 if ((HeapWord*)new_val < g1->popular_object_boundary()) {
3818 Atomic::inc(&num_ct_writes_filtered_pop);
3819 }
3820 }
3821 if ((num_ct_writes % 1000000) == 0) {
3822 jint num_ct_writes_filtered =
3823 num_ct_writes_filtered_in_hr +
3824 num_ct_writes_filtered_null +
3825 num_ct_writes_filtered_pop;
3827 tty->print_cr("%d potential CT writes: %5.2f%% filtered\n"
3828 " (%5.2f%% intra-HR, %5.2f%% null, %5.2f%% popular).",
3829 num_ct_writes,
3830 100.0*(float)num_ct_writes_filtered/(float)num_ct_writes,
3831 100.0*(float)num_ct_writes_filtered_in_hr/
3832 (float)num_ct_writes,
3833 100.0*(float)num_ct_writes_filtered_null/
3834 (float)num_ct_writes,
3835 100.0*(float)num_ct_writes_filtered_pop/
3836 (float)num_ct_writes);
3837 }
3838 return Thread::current();
3839 }
3841 static address dirty_card_log_enqueue = 0;
3842 static u_char* dirty_card_log_enqueue_end = 0;
3844 // This gets to assume that o0 contains the object address.
3845 static void generate_dirty_card_log_enqueue(jbyte* byte_map_base) {
3846 BufferBlob* bb = BufferBlob::create("dirty_card_enqueue", EnqueueCodeSize*2);
3847 CodeBuffer buf(bb->instructions_begin(), bb->instructions_size());
3848 MacroAssembler masm(&buf);
3849 address start = masm.pc();
3851 Label not_already_dirty, restart, refill;
3853 #ifdef _LP64
3854 masm.srlx(O0, CardTableModRefBS::card_shift, O0);
3855 #else
3856 masm.srl(O0, CardTableModRefBS::card_shift, O0);
3857 #endif
3858 Address rs(O1, (address)byte_map_base);
3859 masm.load_address(rs); // O1 := <card table base>
3860 masm.ldub(O0, O1, O2); // O2 := [O0 + O1]
3862 masm.br_on_reg_cond(Assembler::rc_nz, /*annul*/false, Assembler::pt,
3863 O2, not_already_dirty);
3864 // Get O1 + O2 into a reg by itself -- useful in the take-the-branch
3865 // case, harmless if not.
3866 masm.delayed()->add(O0, O1, O3);
3868 // We didn't take the branch, so we're already dirty: return.
3869 // Use return-from-leaf
3870 masm.retl();
3871 masm.delayed()->nop();
3873 // Not dirty.
3874 masm.bind(not_already_dirty);
3875 // First, dirty it.
3876 masm.stb(G0, O3, G0); // [cardPtr] := 0 (i.e., dirty).
3877 int dirty_card_q_index_byte_offset =
3878 in_bytes(JavaThread::dirty_card_queue_offset() +
3879 PtrQueue::byte_offset_of_index());
3880 int dirty_card_q_buf_byte_offset =
3881 in_bytes(JavaThread::dirty_card_queue_offset() +
3882 PtrQueue::byte_offset_of_buf());
3883 masm.bind(restart);
3884 masm.ld_ptr(G2_thread, dirty_card_q_index_byte_offset, L0);
3886 masm.br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pn,
3887 L0, refill);
3888 // If the branch is taken, no harm in executing this in the delay slot.
3889 masm.delayed()->ld_ptr(G2_thread, dirty_card_q_buf_byte_offset, L1);
3890 masm.sub(L0, oopSize, L0);
3892 masm.st_ptr(O3, L1, L0); // [_buf + index] := I0
3893 // Use return-from-leaf
3894 masm.retl();
3895 masm.delayed()->st_ptr(L0, G2_thread, dirty_card_q_index_byte_offset);
3897 masm.bind(refill);
3898 address handle_zero =
3899 CAST_FROM_FN_PTR(address,
3900 &DirtyCardQueueSet::handle_zero_index_for_thread);
3901 // This should be rare enough that we can afford to save all the
3902 // scratch registers that the calling context might be using.
3903 masm.mov(G1_scratch, L3);
3904 masm.mov(G3_scratch, L5);
3905 // We need the value of O3 above (for the write into the buffer), so we
3906 // save and restore it.
3907 masm.mov(O3, L6);
3908 // Since the call will overwrite O7, we save and restore that, as well.
3909 masm.mov(O7, L4);
3911 masm.call_VM_leaf(L7_thread_cache, handle_zero, G2_thread);
3912 masm.mov(L3, G1_scratch);
3913 masm.mov(L5, G3_scratch);
3914 masm.mov(L6, O3);
3915 masm.br(Assembler::always, /*annul*/false, Assembler::pt, restart);
3916 masm.delayed()->mov(L4, O7);
3918 dirty_card_log_enqueue = start;
3919 dirty_card_log_enqueue_end = masm.pc();
3920 // XXX Should have a guarantee here about not going off the end!
3921 // Does it already do so? Do an experiment...
3922 }
3924 static inline void
3925 generate_dirty_card_log_enqueue_if_necessary(jbyte* byte_map_base) {
3926 if (dirty_card_log_enqueue == 0) {
3927 generate_dirty_card_log_enqueue(byte_map_base);
3928 assert(dirty_card_log_enqueue != 0, "postcondition.");
3929 if (G1SATBPrintStubs) {
3930 tty->print_cr("Generated dirty_card enqueue:");
3931 Disassembler::decode((u_char*)dirty_card_log_enqueue,
3932 dirty_card_log_enqueue_end,
3933 tty);
3934 }
3935 }
3936 }
3939 void MacroAssembler::g1_write_barrier_post(Register store_addr, Register new_val, Register tmp) {
3941 Label filtered;
3942 MacroAssembler* post_filter_masm = this;
3944 if (new_val == G0) return;
3945 if (G1DisablePostBarrier) return;
3947 G1SATBCardTableModRefBS* bs = (G1SATBCardTableModRefBS*) Universe::heap()->barrier_set();
3948 assert(bs->kind() == BarrierSet::G1SATBCT ||
3949 bs->kind() == BarrierSet::G1SATBCTLogging, "wrong barrier");
3950 if (G1RSBarrierRegionFilter) {
3951 xor3(store_addr, new_val, tmp);
3952 #ifdef _LP64
3953 srlx(tmp, HeapRegion::LogOfHRGrainBytes, tmp);
3954 #else
3955 srl(tmp, HeapRegion::LogOfHRGrainBytes, tmp);
3956 #endif
3957 if (G1PrintCTFilterStats) {
3958 guarantee(tmp->is_global(), "Or stats won't work...");
3959 // This is a sleazy hack: I'm temporarily hijacking G2, which I
3960 // promise to restore.
3961 mov(new_val, G2);
3962 save_frame(0);
3963 mov(tmp, O0);
3964 mov(G2, O1);
3965 // Save G-regs that target may use.
3966 mov(G1, L1);
3967 mov(G2, L2);
3968 mov(G3, L3);
3969 mov(G4, L4);
3970 mov(G5, L5);
3971 call(CAST_FROM_FN_PTR(address, &count_ct_writes));
3972 delayed()->nop();
3973 mov(O0, G2);
3974 // Restore G-regs that target may have used.
3975 mov(L1, G1);
3976 mov(L3, G3);
3977 mov(L4, G4);
3978 mov(L5, G5);
3979 restore(G0, G0, G0);
3980 }
3981 // XXX Should I predict this taken or not? Does it mattern?
3982 br_on_reg_cond(rc_z, /*annul*/false, Assembler::pt, tmp, filtered);
3983 delayed()->nop();
3984 }
3986 // Now we decide how to generate the card table write. If we're
3987 // enqueueing, we call out to a generated function. Otherwise, we do it
3988 // inline here.
3990 if (G1RSBarrierUseQueue) {
3991 // If the "store_addr" register is an "in" or "local" register, move it to
3992 // a scratch reg so we can pass it as an argument.
3993 bool use_scr = !(store_addr->is_global() || store_addr->is_out());
3994 // Pick a scratch register different from "tmp".
3995 Register scr = (tmp == G1_scratch ? G3_scratch : G1_scratch);
3996 // Make sure we use up the delay slot!
3997 if (use_scr) {
3998 post_filter_masm->mov(store_addr, scr);
3999 } else {
4000 post_filter_masm->nop();
4001 }
4002 generate_dirty_card_log_enqueue_if_necessary(bs->byte_map_base);
4003 save_frame(0);
4004 call(dirty_card_log_enqueue);
4005 if (use_scr) {
4006 delayed()->mov(scr, O0);
4007 } else {
4008 delayed()->mov(store_addr->after_save(), O0);
4009 }
4010 restore();
4012 } else {
4014 #ifdef _LP64
4015 post_filter_masm->srlx(store_addr, CardTableModRefBS::card_shift, store_addr);
4016 #else
4017 post_filter_masm->srl(store_addr, CardTableModRefBS::card_shift, store_addr);
4018 #endif
4019 assert( tmp != store_addr, "need separate temp reg");
4020 Address rs(tmp, (address)bs->byte_map_base);
4021 load_address(rs);
4022 stb(G0, rs.base(), store_addr);
4023 }
4025 bind(filtered);
4027 }
4029 #endif // SERIALGC
4030 ///////////////////////////////////////////////////////////////////////////////////
4032 void MacroAssembler::card_write_barrier_post(Register store_addr, Register new_val, Register tmp) {
4033 // If we're writing constant NULL, we can skip the write barrier.
4034 if (new_val == G0) return;
4035 CardTableModRefBS* bs = (CardTableModRefBS*) Universe::heap()->barrier_set();
4036 assert(bs->kind() == BarrierSet::CardTableModRef ||
4037 bs->kind() == BarrierSet::CardTableExtension, "wrong barrier");
4038 card_table_write(bs->byte_map_base, tmp, store_addr);
4039 }
4041 void MacroAssembler::load_klass(Register s, Register d) {
4042 // The number of bytes in this code is used by
4043 // MachCallDynamicJavaNode::ret_addr_offset()
4044 // if this changes, change that.
4045 if (UseCompressedOops) {
4046 lduw(s, oopDesc::klass_offset_in_bytes(), d);
4047 decode_heap_oop_not_null(d);
4048 } else {
4049 ld_ptr(s, oopDesc::klass_offset_in_bytes(), d);
4050 }
4051 }
4053 // ??? figure out src vs. dst!
4054 void MacroAssembler::store_klass(Register d, Register s1) {
4055 if (UseCompressedOops) {
4056 assert(s1 != d, "not enough registers");
4057 encode_heap_oop_not_null(d);
4058 // Zero out entire klass field first.
4059 st_ptr(G0, s1, oopDesc::klass_offset_in_bytes());
4060 st(d, s1, oopDesc::klass_offset_in_bytes());
4061 } else {
4062 st_ptr(d, s1, oopDesc::klass_offset_in_bytes());
4063 }
4064 }
4066 void MacroAssembler::load_heap_oop(const Address& s, Register d, int offset) {
4067 if (UseCompressedOops) {
4068 lduw(s, d, offset);
4069 decode_heap_oop(d);
4070 } else {
4071 ld_ptr(s, d, offset);
4072 }
4073 }
4075 void MacroAssembler::load_heap_oop(Register s1, Register s2, Register d) {
4076 if (UseCompressedOops) {
4077 lduw(s1, s2, d);
4078 decode_heap_oop(d, d);
4079 } else {
4080 ld_ptr(s1, s2, d);
4081 }
4082 }
4084 void MacroAssembler::load_heap_oop(Register s1, int simm13a, Register d) {
4085 if (UseCompressedOops) {
4086 lduw(s1, simm13a, d);
4087 decode_heap_oop(d, d);
4088 } else {
4089 ld_ptr(s1, simm13a, d);
4090 }
4091 }
4093 void MacroAssembler::store_heap_oop(Register d, Register s1, Register s2) {
4094 if (UseCompressedOops) {
4095 assert(s1 != d && s2 != d, "not enough registers");
4096 encode_heap_oop(d);
4097 st(d, s1, s2);
4098 } else {
4099 st_ptr(d, s1, s2);
4100 }
4101 }
4103 void MacroAssembler::store_heap_oop(Register d, Register s1, int simm13a) {
4104 if (UseCompressedOops) {
4105 assert(s1 != d, "not enough registers");
4106 encode_heap_oop(d);
4107 st(d, s1, simm13a);
4108 } else {
4109 st_ptr(d, s1, simm13a);
4110 }
4111 }
4113 void MacroAssembler::store_heap_oop(Register d, const Address& a, int offset) {
4114 if (UseCompressedOops) {
4115 assert(a.base() != d, "not enough registers");
4116 encode_heap_oop(d);
4117 st(d, a, offset);
4118 } else {
4119 st_ptr(d, a, offset);
4120 }
4121 }
4124 void MacroAssembler::encode_heap_oop(Register src, Register dst) {
4125 assert (UseCompressedOops, "must be compressed");
4126 Label done;
4127 if (src == dst) {
4128 // optimize for frequent case src == dst
4129 bpr(rc_nz, true, Assembler::pt, src, done);
4130 delayed() -> sub(src, G6_heapbase, dst); // annuled if not taken
4131 bind(done);
4132 srlx(src, LogMinObjAlignmentInBytes, dst);
4133 } else {
4134 bpr(rc_z, false, Assembler::pn, src, done);
4135 delayed() -> mov(G0, dst);
4136 // could be moved before branch, and annulate delay,
4137 // but may add some unneeded work decoding null
4138 sub(src, G6_heapbase, dst);
4139 srlx(dst, LogMinObjAlignmentInBytes, dst);
4140 bind(done);
4141 }
4142 }
4145 void MacroAssembler::encode_heap_oop_not_null(Register r) {
4146 assert (UseCompressedOops, "must be compressed");
4147 sub(r, G6_heapbase, r);
4148 srlx(r, LogMinObjAlignmentInBytes, r);
4149 }
4151 void MacroAssembler::encode_heap_oop_not_null(Register src, Register dst) {
4152 assert (UseCompressedOops, "must be compressed");
4153 sub(src, G6_heapbase, dst);
4154 srlx(dst, LogMinObjAlignmentInBytes, dst);
4155 }
4157 // Same algorithm as oops.inline.hpp decode_heap_oop.
4158 void MacroAssembler::decode_heap_oop(Register src, Register dst) {
4159 assert (UseCompressedOops, "must be compressed");
4160 Label done;
4161 sllx(src, LogMinObjAlignmentInBytes, dst);
4162 bpr(rc_nz, true, Assembler::pt, dst, done);
4163 delayed() -> add(dst, G6_heapbase, dst); // annuled if not taken
4164 bind(done);
4165 }
4167 void MacroAssembler::decode_heap_oop_not_null(Register r) {
4168 // Do not add assert code to this unless you change vtableStubs_sparc.cpp
4169 // pd_code_size_limit.
4170 assert (UseCompressedOops, "must be compressed");
4171 sllx(r, LogMinObjAlignmentInBytes, r);
4172 add(r, G6_heapbase, r);
4173 }
4175 void MacroAssembler::decode_heap_oop_not_null(Register src, Register dst) {
4176 // Do not add assert code to this unless you change vtableStubs_sparc.cpp
4177 // pd_code_size_limit.
4178 assert (UseCompressedOops, "must be compressed");
4179 sllx(src, LogMinObjAlignmentInBytes, dst);
4180 add(dst, G6_heapbase, dst);
4181 }
4183 void MacroAssembler::reinit_heapbase() {
4184 if (UseCompressedOops) {
4185 // call indirectly to solve generation ordering problem
4186 Address base(G6_heapbase, (address)Universe::heap_base_addr());
4187 load_ptr_contents(base, G6_heapbase);
4188 }
4189 }