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annotate src/cpu/sparc/vm/assembler_sparc.cpp @ 1669:cc3fdfeb54b0 hs19-b05
Merge
author | trims |
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date | Thu, 29 Jul 2010 23:14:56 -0700 |
parents | c18cbe5936b8 |
children | a64438a2b7e8 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_assembler_sparc.cpp.incl" | |
27 | |
727 | 28 // Convert the raw encoding form into the form expected by the |
29 // constructor for Address. | |
30 Address Address::make_raw(int base, int index, int scale, int disp, bool disp_is_oop) { | |
31 assert(scale == 0, "not supported"); | |
32 RelocationHolder rspec; | |
33 if (disp_is_oop) { | |
34 rspec = Relocation::spec_simple(relocInfo::oop_type); | |
0 | 35 } |
727 | 36 |
37 Register rindex = as_Register(index); | |
38 if (rindex != G0) { | |
39 Address madr(as_Register(base), rindex); | |
40 madr._rspec = rspec; | |
41 return madr; | |
42 } else { | |
43 Address madr(as_Register(base), disp); | |
44 madr._rspec = rspec; | |
45 return madr; | |
46 } | |
47 } | |
48 | |
49 Address Argument::address_in_frame() const { | |
50 // Warning: In LP64 mode disp will occupy more than 10 bits, but | |
51 // op codes such as ld or ldx, only access disp() to get | |
52 // their simm13 argument. | |
53 int disp = ((_number - Argument::n_register_parameters + frame::memory_parameter_word_sp_offset) * BytesPerWord) + STACK_BIAS; | |
54 if (is_in()) | |
55 return Address(FP, disp); // In argument. | |
56 else | |
57 return Address(SP, disp); // Out argument. | |
0 | 58 } |
59 | |
60 static const char* argumentNames[][2] = { | |
61 {"A0","P0"}, {"A1","P1"}, {"A2","P2"}, {"A3","P3"}, {"A4","P4"}, | |
62 {"A5","P5"}, {"A6","P6"}, {"A7","P7"}, {"A8","P8"}, {"A9","P9"}, | |
63 {"A(n>9)","P(n>9)"} | |
64 }; | |
65 | |
66 const char* Argument::name() const { | |
67 int nofArgs = sizeof argumentNames / sizeof argumentNames[0]; | |
68 int num = number(); | |
69 if (num >= nofArgs) num = nofArgs - 1; | |
70 return argumentNames[num][is_in() ? 1 : 0]; | |
71 } | |
72 | |
73 void Assembler::print_instruction(int inst) { | |
74 const char* s; | |
75 switch (inv_op(inst)) { | |
76 default: s = "????"; break; | |
77 case call_op: s = "call"; break; | |
78 case branch_op: | |
79 switch (inv_op2(inst)) { | |
80 case bpr_op2: s = "bpr"; break; | |
81 case fb_op2: s = "fb"; break; | |
82 case fbp_op2: s = "fbp"; break; | |
83 case br_op2: s = "br"; break; | |
84 case bp_op2: s = "bp"; break; | |
85 case cb_op2: s = "cb"; break; | |
86 default: s = "????"; break; | |
87 } | |
88 } | |
89 ::tty->print("%s", s); | |
90 } | |
91 | |
92 | |
93 // Patch instruction inst at offset inst_pos to refer to dest_pos | |
94 // and return the resulting instruction. | |
95 // We should have pcs, not offsets, but since all is relative, it will work out | |
96 // OK. | |
97 int Assembler::patched_branch(int dest_pos, int inst, int inst_pos) { | |
98 | |
99 int m; // mask for displacement field | |
100 int v; // new value for displacement field | |
101 const int word_aligned_ones = -4; | |
102 switch (inv_op(inst)) { | |
103 default: ShouldNotReachHere(); | |
104 case call_op: m = wdisp(word_aligned_ones, 0, 30); v = wdisp(dest_pos, inst_pos, 30); break; | |
105 case branch_op: | |
106 switch (inv_op2(inst)) { | |
107 case bpr_op2: m = wdisp16(word_aligned_ones, 0); v = wdisp16(dest_pos, inst_pos); break; | |
108 case fbp_op2: m = wdisp( word_aligned_ones, 0, 19); v = wdisp( dest_pos, inst_pos, 19); break; | |
109 case bp_op2: m = wdisp( word_aligned_ones, 0, 19); v = wdisp( dest_pos, inst_pos, 19); break; | |
110 case fb_op2: m = wdisp( word_aligned_ones, 0, 22); v = wdisp( dest_pos, inst_pos, 22); break; | |
111 case br_op2: m = wdisp( word_aligned_ones, 0, 22); v = wdisp( dest_pos, inst_pos, 22); break; | |
112 case cb_op2: m = wdisp( word_aligned_ones, 0, 22); v = wdisp( dest_pos, inst_pos, 22); break; | |
113 default: ShouldNotReachHere(); | |
114 } | |
115 } | |
116 return inst & ~m | v; | |
117 } | |
118 | |
119 // Return the offset of the branch destionation of instruction inst | |
120 // at offset pos. | |
121 // Should have pcs, but since all is relative, it works out. | |
122 int Assembler::branch_destination(int inst, int pos) { | |
123 int r; | |
124 switch (inv_op(inst)) { | |
125 default: ShouldNotReachHere(); | |
126 case call_op: r = inv_wdisp(inst, pos, 30); break; | |
127 case branch_op: | |
128 switch (inv_op2(inst)) { | |
129 case bpr_op2: r = inv_wdisp16(inst, pos); break; | |
130 case fbp_op2: r = inv_wdisp( inst, pos, 19); break; | |
131 case bp_op2: r = inv_wdisp( inst, pos, 19); break; | |
132 case fb_op2: r = inv_wdisp( inst, pos, 22); break; | |
133 case br_op2: r = inv_wdisp( inst, pos, 22); break; | |
134 case cb_op2: r = inv_wdisp( inst, pos, 22); break; | |
135 default: ShouldNotReachHere(); | |
136 } | |
137 } | |
138 return r; | |
139 } | |
140 | |
141 int AbstractAssembler::code_fill_byte() { | |
142 return 0x00; // illegal instruction 0x00000000 | |
143 } | |
144 | |
342
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145 Assembler::Condition Assembler::reg_cond_to_cc_cond(Assembler::RCondition in) { |
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146 switch (in) { |
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147 case rc_z: return equal; |
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148 case rc_lez: return lessEqual; |
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149 case rc_lz: return less; |
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150 case rc_nz: return notEqual; |
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151 case rc_gz: return greater; |
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152 case rc_gez: return greaterEqual; |
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153 default: |
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154 ShouldNotReachHere(); |
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155 } |
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156 return equal; |
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157 } |
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158 |
0 | 159 // Generate a bunch 'o stuff (including v9's |
160 #ifndef PRODUCT | |
161 void Assembler::test_v9() { | |
162 add( G0, G1, G2 ); | |
163 add( G3, 0, G4 ); | |
164 | |
165 addcc( G5, G6, G7 ); | |
166 addcc( I0, 1, I1 ); | |
167 addc( I2, I3, I4 ); | |
168 addc( I5, -1, I6 ); | |
169 addccc( I7, L0, L1 ); | |
170 addccc( L2, (1 << 12) - 2, L3 ); | |
171 | |
172 Label lbl1, lbl2, lbl3; | |
173 | |
174 bind(lbl1); | |
175 | |
176 bpr( rc_z, true, pn, L4, pc(), relocInfo::oop_type ); | |
177 delayed()->nop(); | |
178 bpr( rc_lez, false, pt, L5, lbl1); | |
179 delayed()->nop(); | |
180 | |
181 fb( f_never, true, pc() + 4, relocInfo::none); | |
182 delayed()->nop(); | |
183 fb( f_notEqual, false, lbl2 ); | |
184 delayed()->nop(); | |
185 | |
186 fbp( f_notZero, true, fcc0, pn, pc() - 4, relocInfo::none); | |
187 delayed()->nop(); | |
188 fbp( f_lessOrGreater, false, fcc1, pt, lbl3 ); | |
189 delayed()->nop(); | |
190 | |
191 br( equal, true, pc() + 1024, relocInfo::none); | |
192 delayed()->nop(); | |
193 br( lessEqual, false, lbl1 ); | |
194 delayed()->nop(); | |
195 br( never, false, lbl1 ); | |
196 delayed()->nop(); | |
197 | |
198 bp( less, true, icc, pn, pc(), relocInfo::none); | |
199 delayed()->nop(); | |
200 bp( lessEqualUnsigned, false, xcc, pt, lbl2 ); | |
201 delayed()->nop(); | |
202 | |
203 call( pc(), relocInfo::none); | |
204 delayed()->nop(); | |
205 call( lbl3 ); | |
206 delayed()->nop(); | |
207 | |
208 | |
209 casa( L6, L7, O0 ); | |
210 casxa( O1, O2, O3, 0 ); | |
211 | |
212 udiv( O4, O5, O7 ); | |
213 udiv( G0, (1 << 12) - 1, G1 ); | |
214 sdiv( G1, G2, G3 ); | |
215 sdiv( G4, -((1 << 12) - 1), G5 ); | |
216 udivcc( G6, G7, I0 ); | |
217 udivcc( I1, -((1 << 12) - 2), I2 ); | |
218 sdivcc( I3, I4, I5 ); | |
219 sdivcc( I6, -((1 << 12) - 0), I7 ); | |
220 | |
221 done(); | |
222 retry(); | |
223 | |
224 fadd( FloatRegisterImpl::S, F0, F1, F2 ); | |
225 fsub( FloatRegisterImpl::D, F34, F0, F62 ); | |
226 | |
227 fcmp( FloatRegisterImpl::Q, fcc0, F0, F60); | |
228 fcmpe( FloatRegisterImpl::S, fcc1, F31, F30); | |
229 | |
230 ftox( FloatRegisterImpl::D, F2, F4 ); | |
231 ftoi( FloatRegisterImpl::Q, F4, F8 ); | |
232 | |
233 ftof( FloatRegisterImpl::S, FloatRegisterImpl::Q, F3, F12 ); | |
234 | |
235 fxtof( FloatRegisterImpl::S, F4, F5 ); | |
236 fitof( FloatRegisterImpl::D, F6, F8 ); | |
237 | |
238 fmov( FloatRegisterImpl::Q, F16, F20 ); | |
239 fneg( FloatRegisterImpl::S, F6, F7 ); | |
240 fabs( FloatRegisterImpl::D, F10, F12 ); | |
241 | |
242 fmul( FloatRegisterImpl::Q, F24, F28, F32 ); | |
243 fmul( FloatRegisterImpl::S, FloatRegisterImpl::D, F8, F9, F14 ); | |
244 fdiv( FloatRegisterImpl::S, F10, F11, F12 ); | |
245 | |
246 fsqrt( FloatRegisterImpl::S, F13, F14 ); | |
247 | |
248 flush( L0, L1 ); | |
249 flush( L2, -1 ); | |
250 | |
251 flushw(); | |
252 | |
253 illtrap( (1 << 22) - 2); | |
254 | |
255 impdep1( 17, (1 << 19) - 1 ); | |
256 impdep2( 3, 0 ); | |
257 | |
258 jmpl( L3, L4, L5 ); | |
259 delayed()->nop(); | |
260 jmpl( L6, -1, L7, Relocation::spec_simple(relocInfo::none)); | |
261 delayed()->nop(); | |
262 | |
263 | |
264 ldf( FloatRegisterImpl::S, O0, O1, F15 ); | |
265 ldf( FloatRegisterImpl::D, O2, -1, F14 ); | |
266 | |
267 | |
268 ldfsr( O3, O4 ); | |
269 ldfsr( O5, -1 ); | |
270 ldxfsr( O6, O7 ); | |
271 ldxfsr( I0, -1 ); | |
272 | |
273 ldfa( FloatRegisterImpl::D, I1, I2, 1, F16 ); | |
274 ldfa( FloatRegisterImpl::Q, I3, -1, F36 ); | |
275 | |
276 ldsb( I4, I5, I6 ); | |
277 ldsb( I7, -1, G0 ); | |
278 ldsh( G1, G3, G4 ); | |
279 ldsh( G5, -1, G6 ); | |
280 ldsw( G7, L0, L1 ); | |
281 ldsw( L2, -1, L3 ); | |
282 ldub( L4, L5, L6 ); | |
283 ldub( L7, -1, O0 ); | |
284 lduh( O1, O2, O3 ); | |
285 lduh( O4, -1, O5 ); | |
286 lduw( O6, O7, G0 ); | |
287 lduw( G1, -1, G2 ); | |
288 ldx( G3, G4, G5 ); | |
289 ldx( G6, -1, G7 ); | |
290 ldd( I0, I1, I2 ); | |
291 ldd( I3, -1, I4 ); | |
292 | |
293 ldsba( I5, I6, 2, I7 ); | |
294 ldsba( L0, -1, L1 ); | |
295 ldsha( L2, L3, 3, L4 ); | |
296 ldsha( L5, -1, L6 ); | |
297 ldswa( L7, O0, (1 << 8) - 1, O1 ); | |
298 ldswa( O2, -1, O3 ); | |
299 lduba( O4, O5, 0, O6 ); | |
300 lduba( O7, -1, I0 ); | |
301 lduha( I1, I2, 1, I3 ); | |
302 lduha( I4, -1, I5 ); | |
303 lduwa( I6, I7, 2, L0 ); | |
304 lduwa( L1, -1, L2 ); | |
305 ldxa( L3, L4, 3, L5 ); | |
306 ldxa( L6, -1, L7 ); | |
307 ldda( G0, G1, 4, G2 ); | |
308 ldda( G3, -1, G4 ); | |
309 | |
310 ldstub( G5, G6, G7 ); | |
311 ldstub( O0, -1, O1 ); | |
312 | |
313 ldstuba( O2, O3, 5, O4 ); | |
314 ldstuba( O5, -1, O6 ); | |
315 | |
316 and3( I0, L0, O0 ); | |
317 and3( G7, -1, O7 ); | |
318 andcc( L2, I2, G2 ); | |
319 andcc( L4, -1, G4 ); | |
320 andn( I5, I6, I7 ); | |
321 andn( I6, -1, I7 ); | |
322 andncc( I5, I6, I7 ); | |
323 andncc( I7, -1, I6 ); | |
324 or3( I5, I6, I7 ); | |
325 or3( I7, -1, I6 ); | |
326 orcc( I5, I6, I7 ); | |
327 orcc( I7, -1, I6 ); | |
328 orn( I5, I6, I7 ); | |
329 orn( I7, -1, I6 ); | |
330 orncc( I5, I6, I7 ); | |
331 orncc( I7, -1, I6 ); | |
332 xor3( I5, I6, I7 ); | |
333 xor3( I7, -1, I6 ); | |
334 xorcc( I5, I6, I7 ); | |
335 xorcc( I7, -1, I6 ); | |
336 xnor( I5, I6, I7 ); | |
337 xnor( I7, -1, I6 ); | |
338 xnorcc( I5, I6, I7 ); | |
339 xnorcc( I7, -1, I6 ); | |
340 | |
341 membar( Membar_mask_bits(StoreStore | LoadStore | StoreLoad | LoadLoad | Sync | MemIssue | Lookaside ) ); | |
342 membar( StoreStore ); | |
343 membar( LoadStore ); | |
344 membar( StoreLoad ); | |
345 membar( LoadLoad ); | |
346 membar( Sync ); | |
347 membar( MemIssue ); | |
348 membar( Lookaside ); | |
349 | |
350 fmov( FloatRegisterImpl::S, f_ordered, true, fcc2, F16, F17 ); | |
351 fmov( FloatRegisterImpl::D, rc_lz, L5, F18, F20 ); | |
352 | |
353 movcc( overflowClear, false, icc, I6, L4 ); | |
354 movcc( f_unorderedOrEqual, true, fcc2, (1 << 10) - 1, O0 ); | |
355 | |
356 movr( rc_nz, I5, I6, I7 ); | |
357 movr( rc_gz, L1, -1, L2 ); | |
358 | |
359 mulx( I5, I6, I7 ); | |
360 mulx( I7, -1, I6 ); | |
361 sdivx( I5, I6, I7 ); | |
362 sdivx( I7, -1, I6 ); | |
363 udivx( I5, I6, I7 ); | |
364 udivx( I7, -1, I6 ); | |
365 | |
366 umul( I5, I6, I7 ); | |
367 umul( I7, -1, I6 ); | |
368 smul( I5, I6, I7 ); | |
369 smul( I7, -1, I6 ); | |
370 umulcc( I5, I6, I7 ); | |
371 umulcc( I7, -1, I6 ); | |
372 smulcc( I5, I6, I7 ); | |
373 smulcc( I7, -1, I6 ); | |
374 | |
375 mulscc( I5, I6, I7 ); | |
376 mulscc( I7, -1, I6 ); | |
377 | |
378 nop(); | |
379 | |
380 | |
381 popc( G0, G1); | |
382 popc( -1, G2); | |
383 | |
384 prefetch( L1, L2, severalReads ); | |
385 prefetch( L3, -1, oneRead ); | |
386 prefetcha( O3, O2, 6, severalWritesAndPossiblyReads ); | |
387 prefetcha( G2, -1, oneWrite ); | |
388 | |
389 rett( I7, I7); | |
390 delayed()->nop(); | |
391 rett( G0, -1, relocInfo::none); | |
392 delayed()->nop(); | |
393 | |
394 save( I5, I6, I7 ); | |
395 save( I7, -1, I6 ); | |
396 restore( I5, I6, I7 ); | |
397 restore( I7, -1, I6 ); | |
398 | |
399 saved(); | |
400 restored(); | |
401 | |
402 sethi( 0xaaaaaaaa, I3, Relocation::spec_simple(relocInfo::none)); | |
403 | |
404 sll( I5, I6, I7 ); | |
405 sll( I7, 31, I6 ); | |
406 srl( I5, I6, I7 ); | |
407 srl( I7, 0, I6 ); | |
408 sra( I5, I6, I7 ); | |
409 sra( I7, 30, I6 ); | |
410 sllx( I5, I6, I7 ); | |
411 sllx( I7, 63, I6 ); | |
412 srlx( I5, I6, I7 ); | |
413 srlx( I7, 0, I6 ); | |
414 srax( I5, I6, I7 ); | |
415 srax( I7, 62, I6 ); | |
416 | |
417 sir( -1 ); | |
418 | |
419 stbar(); | |
420 | |
421 stf( FloatRegisterImpl::Q, F40, G0, I7 ); | |
422 stf( FloatRegisterImpl::S, F18, I3, -1 ); | |
423 | |
424 stfsr( L1, L2 ); | |
425 stfsr( I7, -1 ); | |
426 stxfsr( I6, I5 ); | |
427 stxfsr( L4, -1 ); | |
428 | |
429 stfa( FloatRegisterImpl::D, F22, I6, I7, 7 ); | |
430 stfa( FloatRegisterImpl::Q, F44, G0, -1 ); | |
431 | |
432 stb( L5, O2, I7 ); | |
433 stb( I7, I6, -1 ); | |
434 sth( L5, O2, I7 ); | |
435 sth( I7, I6, -1 ); | |
436 stw( L5, O2, I7 ); | |
437 stw( I7, I6, -1 ); | |
438 stx( L5, O2, I7 ); | |
439 stx( I7, I6, -1 ); | |
440 std( L5, O2, I7 ); | |
441 std( I7, I6, -1 ); | |
442 | |
443 stba( L5, O2, I7, 8 ); | |
444 stba( I7, I6, -1 ); | |
445 stha( L5, O2, I7, 9 ); | |
446 stha( I7, I6, -1 ); | |
447 stwa( L5, O2, I7, 0 ); | |
448 stwa( I7, I6, -1 ); | |
449 stxa( L5, O2, I7, 11 ); | |
450 stxa( I7, I6, -1 ); | |
451 stda( L5, O2, I7, 12 ); | |
452 stda( I7, I6, -1 ); | |
453 | |
454 sub( I5, I6, I7 ); | |
455 sub( I7, -1, I6 ); | |
456 subcc( I5, I6, I7 ); | |
457 subcc( I7, -1, I6 ); | |
458 subc( I5, I6, I7 ); | |
459 subc( I7, -1, I6 ); | |
460 subccc( I5, I6, I7 ); | |
461 subccc( I7, -1, I6 ); | |
462 | |
463 swap( I5, I6, I7 ); | |
464 swap( I7, -1, I6 ); | |
465 | |
466 swapa( G0, G1, 13, G2 ); | |
467 swapa( I7, -1, I6 ); | |
468 | |
469 taddcc( I5, I6, I7 ); | |
470 taddcc( I7, -1, I6 ); | |
471 taddcctv( I5, I6, I7 ); | |
472 taddcctv( I7, -1, I6 ); | |
473 | |
474 tsubcc( I5, I6, I7 ); | |
475 tsubcc( I7, -1, I6 ); | |
476 tsubcctv( I5, I6, I7 ); | |
477 tsubcctv( I7, -1, I6 ); | |
478 | |
479 trap( overflowClear, xcc, G0, G1 ); | |
480 trap( lessEqual, icc, I7, 17 ); | |
481 | |
482 bind(lbl2); | |
483 bind(lbl3); | |
484 | |
485 code()->decode(); | |
486 } | |
487 | |
488 // Generate a bunch 'o stuff unique to V8 | |
489 void Assembler::test_v8_onlys() { | |
490 Label lbl1; | |
491 | |
492 cb( cp_0or1or2, false, pc() - 4, relocInfo::none); | |
493 delayed()->nop(); | |
494 cb( cp_never, true, lbl1); | |
495 delayed()->nop(); | |
496 | |
497 cpop1(1, 2, 3, 4); | |
498 cpop2(5, 6, 7, 8); | |
499 | |
500 ldc( I0, I1, 31); | |
501 ldc( I2, -1, 0); | |
502 | |
503 lddc( I4, I4, 30); | |
504 lddc( I6, 0, 1 ); | |
505 | |
506 ldcsr( L0, L1, 0); | |
507 ldcsr( L1, (1 << 12) - 1, 17 ); | |
508 | |
509 stc( 31, L4, L5); | |
510 stc( 30, L6, -(1 << 12) ); | |
511 | |
512 stdc( 0, L7, G0); | |
513 stdc( 1, G1, 0 ); | |
514 | |
515 stcsr( 16, G2, G3); | |
516 stcsr( 17, G4, 1 ); | |
517 | |
518 stdcq( 4, G5, G6); | |
519 stdcq( 5, G7, -1 ); | |
520 | |
521 bind(lbl1); | |
522 | |
523 code()->decode(); | |
524 } | |
525 #endif | |
526 | |
527 // Implementation of MacroAssembler | |
528 | |
529 void MacroAssembler::null_check(Register reg, int offset) { | |
530 if (needs_explicit_null_check((intptr_t)offset)) { | |
531 // provoke OS NULL exception if reg = NULL by | |
532 // accessing M[reg] w/o changing any registers | |
533 ld_ptr(reg, 0, G0); | |
534 } | |
535 else { | |
536 // nothing to do, (later) access of M[reg + offset] | |
537 // will provoke OS NULL exception if reg = NULL | |
538 } | |
539 } | |
540 | |
541 // Ring buffer jumps | |
542 | |
543 #ifndef PRODUCT | |
544 void MacroAssembler::ret( bool trace ) { if (trace) { | |
545 mov(I7, O7); // traceable register | |
546 JMP(O7, 2 * BytesPerInstWord); | |
547 } else { | |
548 jmpl( I7, 2 * BytesPerInstWord, G0 ); | |
549 } | |
550 } | |
551 | |
552 void MacroAssembler::retl( bool trace ) { if (trace) JMP(O7, 2 * BytesPerInstWord); | |
553 else jmpl( O7, 2 * BytesPerInstWord, G0 ); } | |
554 #endif /* PRODUCT */ | |
555 | |
556 | |
557 void MacroAssembler::jmp2(Register r1, Register r2, const char* file, int line ) { | |
558 assert_not_delayed(); | |
559 // This can only be traceable if r1 & r2 are visible after a window save | |
560 if (TraceJumps) { | |
561 #ifndef PRODUCT | |
562 save_frame(0); | |
563 verify_thread(); | |
564 ld(G2_thread, in_bytes(JavaThread::jmp_ring_index_offset()), O0); | |
565 add(G2_thread, in_bytes(JavaThread::jmp_ring_offset()), O1); | |
566 sll(O0, exact_log2(4*sizeof(intptr_t)), O2); | |
567 add(O2, O1, O1); | |
568 | |
569 add(r1->after_save(), r2->after_save(), O2); | |
570 set((intptr_t)file, O3); | |
571 set(line, O4); | |
572 Label L; | |
573 // get nearby pc, store jmp target | |
574 call(L, relocInfo::none); // No relocation for call to pc+0x8 | |
575 delayed()->st(O2, O1, 0); | |
576 bind(L); | |
577 | |
578 // store nearby pc | |
579 st(O7, O1, sizeof(intptr_t)); | |
580 // store file | |
581 st(O3, O1, 2*sizeof(intptr_t)); | |
582 // store line | |
583 st(O4, O1, 3*sizeof(intptr_t)); | |
584 add(O0, 1, O0); | |
585 and3(O0, JavaThread::jump_ring_buffer_size - 1, O0); | |
586 st(O0, G2_thread, in_bytes(JavaThread::jmp_ring_index_offset())); | |
587 restore(); | |
588 #endif /* PRODUCT */ | |
589 } | |
590 jmpl(r1, r2, G0); | |
591 } | |
592 void MacroAssembler::jmp(Register r1, int offset, const char* file, int line ) { | |
593 assert_not_delayed(); | |
594 // This can only be traceable if r1 is visible after a window save | |
595 if (TraceJumps) { | |
596 #ifndef PRODUCT | |
597 save_frame(0); | |
598 verify_thread(); | |
599 ld(G2_thread, in_bytes(JavaThread::jmp_ring_index_offset()), O0); | |
600 add(G2_thread, in_bytes(JavaThread::jmp_ring_offset()), O1); | |
601 sll(O0, exact_log2(4*sizeof(intptr_t)), O2); | |
602 add(O2, O1, O1); | |
603 | |
604 add(r1->after_save(), offset, O2); | |
605 set((intptr_t)file, O3); | |
606 set(line, O4); | |
607 Label L; | |
608 // get nearby pc, store jmp target | |
609 call(L, relocInfo::none); // No relocation for call to pc+0x8 | |
610 delayed()->st(O2, O1, 0); | |
611 bind(L); | |
612 | |
613 // store nearby pc | |
614 st(O7, O1, sizeof(intptr_t)); | |
615 // store file | |
616 st(O3, O1, 2*sizeof(intptr_t)); | |
617 // store line | |
618 st(O4, O1, 3*sizeof(intptr_t)); | |
619 add(O0, 1, O0); | |
620 and3(O0, JavaThread::jump_ring_buffer_size - 1, O0); | |
621 st(O0, G2_thread, in_bytes(JavaThread::jmp_ring_index_offset())); | |
622 restore(); | |
623 #endif /* PRODUCT */ | |
624 } | |
625 jmp(r1, offset); | |
626 } | |
627 | |
628 // This code sequence is relocatable to any address, even on LP64. | |
727 | 629 void MacroAssembler::jumpl(AddressLiteral& addrlit, Register temp, Register d, int offset, const char* file, int line) { |
0 | 630 assert_not_delayed(); |
631 // Force fixed length sethi because NativeJump and NativeFarCall don't handle | |
632 // variable length instruction streams. | |
727 | 633 patchable_sethi(addrlit, temp); |
634 Address a(temp, addrlit.low10() + offset); // Add the offset to the displacement. | |
0 | 635 if (TraceJumps) { |
636 #ifndef PRODUCT | |
637 // Must do the add here so relocation can find the remainder of the | |
638 // value to be relocated. | |
727 | 639 add(a.base(), a.disp(), a.base(), addrlit.rspec(offset)); |
0 | 640 save_frame(0); |
641 verify_thread(); | |
642 ld(G2_thread, in_bytes(JavaThread::jmp_ring_index_offset()), O0); | |
643 add(G2_thread, in_bytes(JavaThread::jmp_ring_offset()), O1); | |
644 sll(O0, exact_log2(4*sizeof(intptr_t)), O2); | |
645 add(O2, O1, O1); | |
646 | |
647 set((intptr_t)file, O3); | |
648 set(line, O4); | |
649 Label L; | |
650 | |
651 // get nearby pc, store jmp target | |
652 call(L, relocInfo::none); // No relocation for call to pc+0x8 | |
653 delayed()->st(a.base()->after_save(), O1, 0); | |
654 bind(L); | |
655 | |
656 // store nearby pc | |
657 st(O7, O1, sizeof(intptr_t)); | |
658 // store file | |
659 st(O3, O1, 2*sizeof(intptr_t)); | |
660 // store line | |
661 st(O4, O1, 3*sizeof(intptr_t)); | |
662 add(O0, 1, O0); | |
663 and3(O0, JavaThread::jump_ring_buffer_size - 1, O0); | |
664 st(O0, G2_thread, in_bytes(JavaThread::jmp_ring_index_offset())); | |
665 restore(); | |
666 jmpl(a.base(), G0, d); | |
667 #else | |
727 | 668 jmpl(a.base(), a.disp(), d); |
0 | 669 #endif /* PRODUCT */ |
670 } else { | |
727 | 671 jmpl(a.base(), a.disp(), d); |
0 | 672 } |
673 } | |
674 | |
727 | 675 void MacroAssembler::jump(AddressLiteral& addrlit, Register temp, int offset, const char* file, int line) { |
676 jumpl(addrlit, temp, G0, offset, file, line); | |
0 | 677 } |
678 | |
679 | |
680 // Convert to C varargs format | |
681 void MacroAssembler::set_varargs( Argument inArg, Register d ) { | |
682 // spill register-resident args to their memory slots | |
683 // (SPARC calling convention requires callers to have already preallocated these) | |
684 // Note that the inArg might in fact be an outgoing argument, | |
685 // if a leaf routine or stub does some tricky argument shuffling. | |
686 // This routine must work even though one of the saved arguments | |
687 // is in the d register (e.g., set_varargs(Argument(0, false), O0)). | |
688 for (Argument savePtr = inArg; | |
689 savePtr.is_register(); | |
690 savePtr = savePtr.successor()) { | |
691 st_ptr(savePtr.as_register(), savePtr.address_in_frame()); | |
692 } | |
693 // return the address of the first memory slot | |
727 | 694 Address a = inArg.address_in_frame(); |
695 add(a.base(), a.disp(), d); | |
0 | 696 } |
697 | |
698 // Conditional breakpoint (for assertion checks in assembly code) | |
699 void MacroAssembler::breakpoint_trap(Condition c, CC cc) { | |
700 trap(c, cc, G0, ST_RESERVED_FOR_USER_0); | |
701 } | |
702 | |
703 // We want to use ST_BREAKPOINT here, but the debugger is confused by it. | |
704 void MacroAssembler::breakpoint_trap() { | |
705 trap(ST_RESERVED_FOR_USER_0); | |
706 } | |
707 | |
708 // flush windows (except current) using flushw instruction if avail. | |
709 void MacroAssembler::flush_windows() { | |
710 if (VM_Version::v9_instructions_work()) flushw(); | |
711 else flush_windows_trap(); | |
712 } | |
713 | |
714 // Write serialization page so VM thread can do a pseudo remote membar | |
715 // We use the current thread pointer to calculate a thread specific | |
716 // offset to write to within the page. This minimizes bus traffic | |
717 // due to cache line collision. | |
718 void MacroAssembler::serialize_memory(Register thread, Register tmp1, Register tmp2) { | |
719 srl(thread, os::get_serialize_page_shift_count(), tmp2); | |
720 if (Assembler::is_simm13(os::vm_page_size())) { | |
721 and3(tmp2, (os::vm_page_size() - sizeof(int)), tmp2); | |
722 } | |
723 else { | |
724 set((os::vm_page_size() - sizeof(int)), tmp1); | |
725 and3(tmp2, tmp1, tmp2); | |
726 } | |
727 | 727 set(os::get_memory_serialize_page(), tmp1); |
0 | 728 st(G0, tmp1, tmp2); |
729 } | |
730 | |
731 | |
732 | |
733 void MacroAssembler::enter() { | |
734 Unimplemented(); | |
735 } | |
736 | |
737 void MacroAssembler::leave() { | |
738 Unimplemented(); | |
739 } | |
740 | |
741 void MacroAssembler::mult(Register s1, Register s2, Register d) { | |
742 if(VM_Version::v9_instructions_work()) { | |
743 mulx (s1, s2, d); | |
744 } else { | |
745 smul (s1, s2, d); | |
746 } | |
747 } | |
748 | |
749 void MacroAssembler::mult(Register s1, int simm13a, Register d) { | |
750 if(VM_Version::v9_instructions_work()) { | |
751 mulx (s1, simm13a, d); | |
752 } else { | |
753 smul (s1, simm13a, d); | |
754 } | |
755 } | |
756 | |
757 | |
758 #ifdef ASSERT | |
759 void MacroAssembler::read_ccr_v8_assert(Register ccr_save) { | |
760 const Register s1 = G3_scratch; | |
761 const Register s2 = G4_scratch; | |
762 Label get_psr_test; | |
763 // Get the condition codes the V8 way. | |
764 read_ccr_trap(s1); | |
765 mov(ccr_save, s2); | |
766 // This is a test of V8 which has icc but not xcc | |
767 // so mask off the xcc bits | |
768 and3(s2, 0xf, s2); | |
769 // Compare condition codes from the V8 and V9 ways. | |
770 subcc(s2, s1, G0); | |
771 br(Assembler::notEqual, true, Assembler::pt, get_psr_test); | |
772 delayed()->breakpoint_trap(); | |
773 bind(get_psr_test); | |
774 } | |
775 | |
776 void MacroAssembler::write_ccr_v8_assert(Register ccr_save) { | |
777 const Register s1 = G3_scratch; | |
778 const Register s2 = G4_scratch; | |
779 Label set_psr_test; | |
780 // Write out the saved condition codes the V8 way | |
781 write_ccr_trap(ccr_save, s1, s2); | |
782 // Read back the condition codes using the V9 instruction | |
783 rdccr(s1); | |
784 mov(ccr_save, s2); | |
785 // This is a test of V8 which has icc but not xcc | |
786 // so mask off the xcc bits | |
787 and3(s2, 0xf, s2); | |
788 and3(s1, 0xf, s1); | |
789 // Compare the V8 way with the V9 way. | |
790 subcc(s2, s1, G0); | |
791 br(Assembler::notEqual, true, Assembler::pt, set_psr_test); | |
792 delayed()->breakpoint_trap(); | |
793 bind(set_psr_test); | |
794 } | |
795 #else | |
796 #define read_ccr_v8_assert(x) | |
797 #define write_ccr_v8_assert(x) | |
798 #endif // ASSERT | |
799 | |
800 void MacroAssembler::read_ccr(Register ccr_save) { | |
801 if (VM_Version::v9_instructions_work()) { | |
802 rdccr(ccr_save); | |
803 // Test code sequence used on V8. Do not move above rdccr. | |
804 read_ccr_v8_assert(ccr_save); | |
805 } else { | |
806 read_ccr_trap(ccr_save); | |
807 } | |
808 } | |
809 | |
810 void MacroAssembler::write_ccr(Register ccr_save) { | |
811 if (VM_Version::v9_instructions_work()) { | |
812 // Test code sequence used on V8. Do not move below wrccr. | |
813 write_ccr_v8_assert(ccr_save); | |
814 wrccr(ccr_save); | |
815 } else { | |
816 const Register temp_reg1 = G3_scratch; | |
817 const Register temp_reg2 = G4_scratch; | |
818 write_ccr_trap(ccr_save, temp_reg1, temp_reg2); | |
819 } | |
820 } | |
821 | |
822 | |
823 // Calls to C land | |
824 | |
825 #ifdef ASSERT | |
826 // a hook for debugging | |
827 static Thread* reinitialize_thread() { | |
828 return ThreadLocalStorage::thread(); | |
829 } | |
830 #else | |
831 #define reinitialize_thread ThreadLocalStorage::thread | |
832 #endif | |
833 | |
834 #ifdef ASSERT | |
835 address last_get_thread = NULL; | |
836 #endif | |
837 | |
838 // call this when G2_thread is not known to be valid | |
839 void MacroAssembler::get_thread() { | |
840 save_frame(0); // to avoid clobbering O0 | |
841 mov(G1, L0); // avoid clobbering G1 | |
842 mov(G5_method, L1); // avoid clobbering G5 | |
843 mov(G3, L2); // avoid clobbering G3 also | |
844 mov(G4, L5); // avoid clobbering G4 | |
845 #ifdef ASSERT | |
727 | 846 AddressLiteral last_get_thread_addrlit(&last_get_thread); |
847 set(last_get_thread_addrlit, L3); | |
0 | 848 inc(L4, get_pc(L4) + 2 * BytesPerInstWord); // skip getpc() code + inc + st_ptr to point L4 at call |
727 | 849 st_ptr(L4, L3, 0); |
0 | 850 #endif |
851 call(CAST_FROM_FN_PTR(address, reinitialize_thread), relocInfo::runtime_call_type); | |
852 delayed()->nop(); | |
853 mov(L0, G1); | |
854 mov(L1, G5_method); | |
855 mov(L2, G3); | |
856 mov(L5, G4); | |
857 restore(O0, 0, G2_thread); | |
858 } | |
859 | |
860 static Thread* verify_thread_subroutine(Thread* gthread_value) { | |
861 Thread* correct_value = ThreadLocalStorage::thread(); | |
862 guarantee(gthread_value == correct_value, "G2_thread value must be the thread"); | |
863 return correct_value; | |
864 } | |
865 | |
866 void MacroAssembler::verify_thread() { | |
867 if (VerifyThread) { | |
868 // NOTE: this chops off the heads of the 64-bit O registers. | |
869 #ifdef CC_INTERP | |
870 save_frame(0); | |
871 #else | |
872 // make sure G2_thread contains the right value | |
873 save_frame_and_mov(0, Lmethod, Lmethod); // to avoid clobbering O0 (and propagate Lmethod for -Xprof) | |
874 mov(G1, L1); // avoid clobbering G1 | |
875 // G2 saved below | |
876 mov(G3, L3); // avoid clobbering G3 | |
877 mov(G4, L4); // avoid clobbering G4 | |
878 mov(G5_method, L5); // avoid clobbering G5_method | |
879 #endif /* CC_INTERP */ | |
880 #if defined(COMPILER2) && !defined(_LP64) | |
881 // Save & restore possible 64-bit Long arguments in G-regs | |
882 srlx(G1,32,L0); | |
883 srlx(G4,32,L6); | |
884 #endif | |
885 call(CAST_FROM_FN_PTR(address,verify_thread_subroutine), relocInfo::runtime_call_type); | |
886 delayed()->mov(G2_thread, O0); | |
887 | |
888 mov(L1, G1); // Restore G1 | |
889 // G2 restored below | |
890 mov(L3, G3); // restore G3 | |
891 mov(L4, G4); // restore G4 | |
892 mov(L5, G5_method); // restore G5_method | |
893 #if defined(COMPILER2) && !defined(_LP64) | |
894 // Save & restore possible 64-bit Long arguments in G-regs | |
895 sllx(L0,32,G2); // Move old high G1 bits high in G2 | |
896 sllx(G1, 0,G1); // Clear current high G1 bits | |
897 or3 (G1,G2,G1); // Recover 64-bit G1 | |
898 sllx(L6,32,G2); // Move old high G4 bits high in G2 | |
899 sllx(G4, 0,G4); // Clear current high G4 bits | |
900 or3 (G4,G2,G4); // Recover 64-bit G4 | |
901 #endif | |
902 restore(O0, 0, G2_thread); | |
903 } | |
904 } | |
905 | |
906 | |
907 void MacroAssembler::save_thread(const Register thread_cache) { | |
908 verify_thread(); | |
909 if (thread_cache->is_valid()) { | |
910 assert(thread_cache->is_local() || thread_cache->is_in(), "bad volatile"); | |
911 mov(G2_thread, thread_cache); | |
912 } | |
913 if (VerifyThread) { | |
914 // smash G2_thread, as if the VM were about to anyway | |
915 set(0x67676767, G2_thread); | |
916 } | |
917 } | |
918 | |
919 | |
920 void MacroAssembler::restore_thread(const Register thread_cache) { | |
921 if (thread_cache->is_valid()) { | |
922 assert(thread_cache->is_local() || thread_cache->is_in(), "bad volatile"); | |
923 mov(thread_cache, G2_thread); | |
924 verify_thread(); | |
925 } else { | |
926 // do it the slow way | |
927 get_thread(); | |
928 } | |
929 } | |
930 | |
931 | |
932 // %%% maybe get rid of [re]set_last_Java_frame | |
933 void MacroAssembler::set_last_Java_frame(Register last_java_sp, Register last_Java_pc) { | |
934 assert_not_delayed(); | |
727 | 935 Address flags(G2_thread, JavaThread::frame_anchor_offset() + |
936 JavaFrameAnchor::flags_offset()); | |
937 Address pc_addr(G2_thread, JavaThread::last_Java_pc_offset()); | |
0 | 938 |
939 // Always set last_Java_pc and flags first because once last_Java_sp is visible | |
940 // has_last_Java_frame is true and users will look at the rest of the fields. | |
941 // (Note: flags should always be zero before we get here so doesn't need to be set.) | |
942 | |
943 #ifdef ASSERT | |
944 // Verify that flags was zeroed on return to Java | |
945 Label PcOk; | |
946 save_frame(0); // to avoid clobbering O0 | |
947 ld_ptr(pc_addr, L0); | |
948 tst(L0); | |
949 #ifdef _LP64 | |
950 brx(Assembler::zero, false, Assembler::pt, PcOk); | |
951 #else | |
952 br(Assembler::zero, false, Assembler::pt, PcOk); | |
953 #endif // _LP64 | |
954 delayed() -> nop(); | |
955 stop("last_Java_pc not zeroed before leaving Java"); | |
956 bind(PcOk); | |
957 | |
958 // Verify that flags was zeroed on return to Java | |
959 Label FlagsOk; | |
960 ld(flags, L0); | |
961 tst(L0); | |
962 br(Assembler::zero, false, Assembler::pt, FlagsOk); | |
963 delayed() -> restore(); | |
964 stop("flags not zeroed before leaving Java"); | |
965 bind(FlagsOk); | |
966 #endif /* ASSERT */ | |
967 // | |
968 // When returning from calling out from Java mode the frame anchor's last_Java_pc | |
969 // will always be set to NULL. It is set here so that if we are doing a call to | |
970 // native (not VM) that we capture the known pc and don't have to rely on the | |
971 // native call having a standard frame linkage where we can find the pc. | |
972 | |
973 if (last_Java_pc->is_valid()) { | |
974 st_ptr(last_Java_pc, pc_addr); | |
975 } | |
976 | |
977 #ifdef _LP64 | |
978 #ifdef ASSERT | |
979 // Make sure that we have an odd stack | |
980 Label StackOk; | |
981 andcc(last_java_sp, 0x01, G0); | |
982 br(Assembler::notZero, false, Assembler::pt, StackOk); | |
983 delayed() -> nop(); | |
984 stop("Stack Not Biased in set_last_Java_frame"); | |
985 bind(StackOk); | |
986 #endif // ASSERT | |
987 assert( last_java_sp != G4_scratch, "bad register usage in set_last_Java_frame"); | |
988 add( last_java_sp, STACK_BIAS, G4_scratch ); | |
727 | 989 st_ptr(G4_scratch, G2_thread, JavaThread::last_Java_sp_offset()); |
0 | 990 #else |
727 | 991 st_ptr(last_java_sp, G2_thread, JavaThread::last_Java_sp_offset()); |
0 | 992 #endif // _LP64 |
993 } | |
994 | |
995 void MacroAssembler::reset_last_Java_frame(void) { | |
996 assert_not_delayed(); | |
997 | |
727 | 998 Address sp_addr(G2_thread, JavaThread::last_Java_sp_offset()); |
999 Address pc_addr(G2_thread, JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()); | |
1000 Address flags (G2_thread, JavaThread::frame_anchor_offset() + JavaFrameAnchor::flags_offset()); | |
0 | 1001 |
1002 #ifdef ASSERT | |
1003 // check that it WAS previously set | |
1004 #ifdef CC_INTERP | |
1005 save_frame(0); | |
1006 #else | |
1007 save_frame_and_mov(0, Lmethod, Lmethod); // Propagate Lmethod to helper frame for -Xprof | |
1008 #endif /* CC_INTERP */ | |
1009 ld_ptr(sp_addr, L0); | |
1010 tst(L0); | |
1011 breakpoint_trap(Assembler::zero, Assembler::ptr_cc); | |
1012 restore(); | |
1013 #endif // ASSERT | |
1014 | |
1015 st_ptr(G0, sp_addr); | |
1016 // Always return last_Java_pc to zero | |
1017 st_ptr(G0, pc_addr); | |
1018 // Always null flags after return to Java | |
1019 st(G0, flags); | |
1020 } | |
1021 | |
1022 | |
1023 void MacroAssembler::call_VM_base( | |
1024 Register oop_result, | |
1025 Register thread_cache, | |
1026 Register last_java_sp, | |
1027 address entry_point, | |
1028 int number_of_arguments, | |
1029 bool check_exceptions) | |
1030 { | |
1031 assert_not_delayed(); | |
1032 | |
1033 // determine last_java_sp register | |
1034 if (!last_java_sp->is_valid()) { | |
1035 last_java_sp = SP; | |
1036 } | |
1037 // debugging support | |
1038 assert(number_of_arguments >= 0 , "cannot have negative number of arguments"); | |
1039 | |
1040 // 64-bit last_java_sp is biased! | |
1041 set_last_Java_frame(last_java_sp, noreg); | |
1042 if (VerifyThread) mov(G2_thread, O0); // about to be smashed; pass early | |
1043 save_thread(thread_cache); | |
1044 // do the call | |
1045 call(entry_point, relocInfo::runtime_call_type); | |
1046 if (!VerifyThread) | |
1047 delayed()->mov(G2_thread, O0); // pass thread as first argument | |
1048 else | |
1049 delayed()->nop(); // (thread already passed) | |
1050 restore_thread(thread_cache); | |
1051 reset_last_Java_frame(); | |
1052 | |
1053 // check for pending exceptions. use Gtemp as scratch register. | |
1054 if (check_exceptions) { | |
1055 check_and_forward_exception(Gtemp); | |
1056 } | |
1057 | |
1058 // get oop result if there is one and reset the value in the thread | |
1059 if (oop_result->is_valid()) { | |
1060 get_vm_result(oop_result); | |
1061 } | |
1062 } | |
1063 | |
1064 void MacroAssembler::check_and_forward_exception(Register scratch_reg) | |
1065 { | |
1066 Label L; | |
1067 | |
1068 check_and_handle_popframe(scratch_reg); | |
1069 check_and_handle_earlyret(scratch_reg); | |
1070 | |
727 | 1071 Address exception_addr(G2_thread, Thread::pending_exception_offset()); |
0 | 1072 ld_ptr(exception_addr, scratch_reg); |
1073 br_null(scratch_reg,false,pt,L); | |
1074 delayed()->nop(); | |
1075 // we use O7 linkage so that forward_exception_entry has the issuing PC | |
1076 call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type); | |
1077 delayed()->nop(); | |
1078 bind(L); | |
1079 } | |
1080 | |
1081 | |
1082 void MacroAssembler::check_and_handle_popframe(Register scratch_reg) { | |
1083 } | |
1084 | |
1085 | |
1086 void MacroAssembler::check_and_handle_earlyret(Register scratch_reg) { | |
1087 } | |
1088 | |
1089 | |
1090 void MacroAssembler::call_VM(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions) { | |
1091 call_VM_base(oop_result, noreg, noreg, entry_point, number_of_arguments, check_exceptions); | |
1092 } | |
1093 | |
1094 | |
1095 void MacroAssembler::call_VM(Register oop_result, address entry_point, Register arg_1, bool check_exceptions) { | |
1096 // O0 is reserved for the thread | |
1097 mov(arg_1, O1); | |
1098 call_VM(oop_result, entry_point, 1, check_exceptions); | |
1099 } | |
1100 | |
1101 | |
1102 void MacroAssembler::call_VM(Register oop_result, address entry_point, Register arg_1, Register arg_2, bool check_exceptions) { | |
1103 // O0 is reserved for the thread | |
1104 mov(arg_1, O1); | |
1105 mov(arg_2, O2); assert(arg_2 != O1, "smashed argument"); | |
1106 call_VM(oop_result, entry_point, 2, check_exceptions); | |
1107 } | |
1108 | |
1109 | |
1110 void MacroAssembler::call_VM(Register oop_result, address entry_point, Register arg_1, Register arg_2, Register arg_3, bool check_exceptions) { | |
1111 // O0 is reserved for the thread | |
1112 mov(arg_1, O1); | |
1113 mov(arg_2, O2); assert(arg_2 != O1, "smashed argument"); | |
1114 mov(arg_3, O3); assert(arg_3 != O1 && arg_3 != O2, "smashed argument"); | |
1115 call_VM(oop_result, entry_point, 3, check_exceptions); | |
1116 } | |
1117 | |
1118 | |
1119 | |
1120 // Note: The following call_VM overloadings are useful when a "save" | |
1121 // has already been performed by a stub, and the last Java frame is | |
1122 // the previous one. In that case, last_java_sp must be passed as FP | |
1123 // instead of SP. | |
1124 | |
1125 | |
1126 void MacroAssembler::call_VM(Register oop_result, Register last_java_sp, address entry_point, int number_of_arguments, bool check_exceptions) { | |
1127 call_VM_base(oop_result, noreg, last_java_sp, entry_point, number_of_arguments, check_exceptions); | |
1128 } | |
1129 | |
1130 | |
1131 void MacroAssembler::call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, bool check_exceptions) { | |
1132 // O0 is reserved for the thread | |
1133 mov(arg_1, O1); | |
1134 call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions); | |
1135 } | |
1136 | |
1137 | |
1138 void MacroAssembler::call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, Register arg_2, bool check_exceptions) { | |
1139 // O0 is reserved for the thread | |
1140 mov(arg_1, O1); | |
1141 mov(arg_2, O2); assert(arg_2 != O1, "smashed argument"); | |
1142 call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions); | |
1143 } | |
1144 | |
1145 | |
1146 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) { | |
1147 // O0 is reserved for the thread | |
1148 mov(arg_1, O1); | |
1149 mov(arg_2, O2); assert(arg_2 != O1, "smashed argument"); | |
1150 mov(arg_3, O3); assert(arg_3 != O1 && arg_3 != O2, "smashed argument"); | |
1151 call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions); | |
1152 } | |
1153 | |
1154 | |
1155 | |
1156 void MacroAssembler::call_VM_leaf_base(Register thread_cache, address entry_point, int number_of_arguments) { | |
1157 assert_not_delayed(); | |
1158 save_thread(thread_cache); | |
1159 // do the call | |
1160 call(entry_point, relocInfo::runtime_call_type); | |
1161 delayed()->nop(); | |
1162 restore_thread(thread_cache); | |
1163 } | |
1164 | |
1165 | |
1166 void MacroAssembler::call_VM_leaf(Register thread_cache, address entry_point, int number_of_arguments) { | |
1167 call_VM_leaf_base(thread_cache, entry_point, number_of_arguments); | |
1168 } | |
1169 | |
1170 | |
1171 void MacroAssembler::call_VM_leaf(Register thread_cache, address entry_point, Register arg_1) { | |
1172 mov(arg_1, O0); | |
1173 call_VM_leaf(thread_cache, entry_point, 1); | |
1174 } | |
1175 | |
1176 | |
1177 void MacroAssembler::call_VM_leaf(Register thread_cache, address entry_point, Register arg_1, Register arg_2) { | |
1178 mov(arg_1, O0); | |
1179 mov(arg_2, O1); assert(arg_2 != O0, "smashed argument"); | |
1180 call_VM_leaf(thread_cache, entry_point, 2); | |
1181 } | |
1182 | |
1183 | |
1184 void MacroAssembler::call_VM_leaf(Register thread_cache, address entry_point, Register arg_1, Register arg_2, Register arg_3) { | |
1185 mov(arg_1, O0); | |
1186 mov(arg_2, O1); assert(arg_2 != O0, "smashed argument"); | |
1187 mov(arg_3, O2); assert(arg_3 != O0 && arg_3 != O1, "smashed argument"); | |
1188 call_VM_leaf(thread_cache, entry_point, 3); | |
1189 } | |
1190 | |
1191 | |
1192 void MacroAssembler::get_vm_result(Register oop_result) { | |
1193 verify_thread(); | |
727 | 1194 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset()); |
0 | 1195 ld_ptr( vm_result_addr, oop_result); |
1196 st_ptr(G0, vm_result_addr); | |
1197 verify_oop(oop_result); | |
1198 } | |
1199 | |
1200 | |
1201 void MacroAssembler::get_vm_result_2(Register oop_result) { | |
1202 verify_thread(); | |
727 | 1203 Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset()); |
0 | 1204 ld_ptr(vm_result_addr_2, oop_result); |
1205 st_ptr(G0, vm_result_addr_2); | |
1206 verify_oop(oop_result); | |
1207 } | |
1208 | |
1209 | |
1210 // We require that C code which does not return a value in vm_result will | |
1211 // leave it undisturbed. | |
1212 void MacroAssembler::set_vm_result(Register oop_result) { | |
1213 verify_thread(); | |
727 | 1214 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset()); |
0 | 1215 verify_oop(oop_result); |
1216 | |
1217 # ifdef ASSERT | |
1218 // Check that we are not overwriting any other oop. | |
1219 #ifdef CC_INTERP | |
1220 save_frame(0); | |
1221 #else | |
1222 save_frame_and_mov(0, Lmethod, Lmethod); // Propagate Lmethod for -Xprof | |
1223 #endif /* CC_INTERP */ | |
1224 ld_ptr(vm_result_addr, L0); | |
1225 tst(L0); | |
1226 restore(); | |
1227 breakpoint_trap(notZero, Assembler::ptr_cc); | |
1228 // } | |
1229 # endif | |
1230 | |
1231 st_ptr(oop_result, vm_result_addr); | |
1232 } | |
1233 | |
1234 | |
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1235 void MacroAssembler::card_table_write(jbyte* byte_map_base, |
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1236 Register tmp, Register obj) { |
0 | 1237 #ifdef _LP64 |
1238 srlx(obj, CardTableModRefBS::card_shift, obj); | |
1239 #else | |
1240 srl(obj, CardTableModRefBS::card_shift, obj); | |
1241 #endif | |
727 | 1242 assert(tmp != obj, "need separate temp reg"); |
1243 set((address) byte_map_base, tmp); | |
1244 stb(G0, tmp, obj); | |
0 | 1245 } |
1246 | |
727 | 1247 |
1248 void MacroAssembler::internal_sethi(const AddressLiteral& addrlit, Register d, bool ForceRelocatable) { | |
0 | 1249 address save_pc; |
1250 int shiftcnt; | |
1251 #ifdef _LP64 | |
1252 # ifdef CHECK_DELAY | |
727 | 1253 assert_not_delayed((char*) "cannot put two instructions in delay slot"); |
0 | 1254 # endif |
1255 v9_dep(); | |
1256 save_pc = pc(); | |
727 | 1257 |
1258 int msb32 = (int) (addrlit.value() >> 32); | |
1259 int lsb32 = (int) (addrlit.value()); | |
1260 | |
1261 if (msb32 == 0 && lsb32 >= 0) { | |
1262 Assembler::sethi(lsb32, d, addrlit.rspec()); | |
0 | 1263 } |
727 | 1264 else if (msb32 == -1) { |
1265 Assembler::sethi(~lsb32, d, addrlit.rspec()); | |
1266 xor3(d, ~low10(~0), d); | |
0 | 1267 } |
1268 else { | |
727 | 1269 Assembler::sethi(msb32, d, addrlit.rspec()); // msb 22-bits |
1270 if (msb32 & 0x3ff) // Any bits? | |
1271 or3(d, msb32 & 0x3ff, d); // msb 32-bits are now in lsb 32 | |
1272 if (lsb32 & 0xFFFFFC00) { // done? | |
1273 if ((lsb32 >> 20) & 0xfff) { // Any bits set? | |
1274 sllx(d, 12, d); // Make room for next 12 bits | |
1275 or3(d, (lsb32 >> 20) & 0xfff, d); // Or in next 12 | |
1276 shiftcnt = 0; // We already shifted | |
0 | 1277 } |
1278 else | |
1279 shiftcnt = 12; | |
727 | 1280 if ((lsb32 >> 10) & 0x3ff) { |
1281 sllx(d, shiftcnt + 10, d); // Make room for last 10 bits | |
1282 or3(d, (lsb32 >> 10) & 0x3ff, d); // Or in next 10 | |
0 | 1283 shiftcnt = 0; |
1284 } | |
1285 else | |
1286 shiftcnt = 10; | |
727 | 1287 sllx(d, shiftcnt + 10, d); // Shift leaving disp field 0'd |
0 | 1288 } |
1289 else | |
727 | 1290 sllx(d, 32, d); |
0 | 1291 } |
727 | 1292 // Pad out the instruction sequence so it can be patched later. |
1293 if (ForceRelocatable || (addrlit.rtype() != relocInfo::none && | |
1294 addrlit.rtype() != relocInfo::runtime_call_type)) { | |
1295 while (pc() < (save_pc + (7 * BytesPerInstWord))) | |
0 | 1296 nop(); |
1297 } | |
1298 #else | |
727 | 1299 Assembler::sethi(addrlit.value(), d, addrlit.rspec()); |
0 | 1300 #endif |
727 | 1301 } |
1302 | |
1303 | |
1304 void MacroAssembler::sethi(const AddressLiteral& addrlit, Register d) { | |
1305 internal_sethi(addrlit, d, false); | |
0 | 1306 } |
1307 | |
727 | 1308 |
1309 void MacroAssembler::patchable_sethi(const AddressLiteral& addrlit, Register d) { | |
1310 internal_sethi(addrlit, d, true); | |
1311 } | |
1312 | |
1313 | |
0 | 1314 int MacroAssembler::size_of_sethi(address a, bool worst_case) { |
1315 #ifdef _LP64 | |
1316 if (worst_case) return 7; | |
1317 intptr_t iaddr = (intptr_t)a; | |
1318 int hi32 = (int)(iaddr >> 32); | |
1319 int lo32 = (int)(iaddr); | |
1320 int inst_count; | |
1321 if (hi32 == 0 && lo32 >= 0) | |
1322 inst_count = 1; | |
1323 else if (hi32 == -1) | |
1324 inst_count = 2; | |
1325 else { | |
1326 inst_count = 2; | |
1327 if ( hi32 & 0x3ff ) | |
1328 inst_count++; | |
1329 if ( lo32 & 0xFFFFFC00 ) { | |
1330 if( (lo32 >> 20) & 0xfff ) inst_count += 2; | |
1331 if( (lo32 >> 10) & 0x3ff ) inst_count += 2; | |
1332 } | |
1333 } | |
1334 return BytesPerInstWord * inst_count; | |
1335 #else | |
1336 return BytesPerInstWord; | |
1337 #endif | |
1338 } | |
1339 | |
1340 int MacroAssembler::worst_case_size_of_set() { | |
1341 return size_of_sethi(NULL, true) + 1; | |
1342 } | |
1343 | |
727 | 1344 |
1345 void MacroAssembler::internal_set(const AddressLiteral& addrlit, Register d, bool ForceRelocatable) { | |
1346 intptr_t value = addrlit.value(); | |
1347 | |
1348 if (!ForceRelocatable && addrlit.rspec().type() == relocInfo::none) { | |
0 | 1349 // can optimize |
727 | 1350 if (-4096 <= value && value <= 4095) { |
0 | 1351 or3(G0, value, d); // setsw (this leaves upper 32 bits sign-extended) |
1352 return; | |
1353 } | |
1354 if (inv_hi22(hi22(value)) == value) { | |
727 | 1355 sethi(addrlit, d); |
0 | 1356 return; |
1357 } | |
1358 } | |
727 | 1359 assert_not_delayed((char*) "cannot put two instructions in delay slot"); |
1360 internal_sethi(addrlit, d, ForceRelocatable); | |
1361 if (ForceRelocatable || addrlit.rspec().type() != relocInfo::none || addrlit.low10() != 0) { | |
1362 add(d, addrlit.low10(), d, addrlit.rspec()); | |
0 | 1363 } |
1364 } | |
1365 | |
727 | 1366 void MacroAssembler::set(const AddressLiteral& al, Register d) { |
1367 internal_set(al, d, false); | |
1368 } | |
1369 | |
1370 void MacroAssembler::set(intptr_t value, Register d) { | |
1371 AddressLiteral al(value); | |
1372 internal_set(al, d, false); | |
0 | 1373 } |
1374 | |
727 | 1375 void MacroAssembler::set(address addr, Register d, RelocationHolder const& rspec) { |
1376 AddressLiteral al(addr, rspec); | |
1377 internal_set(al, d, false); | |
1378 } | |
1379 | |
1380 void MacroAssembler::patchable_set(const AddressLiteral& al, Register d) { | |
1381 internal_set(al, d, true); | |
1382 } | |
1383 | |
1384 void MacroAssembler::patchable_set(intptr_t value, Register d) { | |
1385 AddressLiteral al(value); | |
1386 internal_set(al, d, true); | |
1387 } | |
0 | 1388 |
1389 | |
1390 void MacroAssembler::set64(jlong value, Register d, Register tmp) { | |
1391 assert_not_delayed(); | |
1392 v9_dep(); | |
1393 | |
1394 int hi = (int)(value >> 32); | |
1395 int lo = (int)(value & ~0); | |
1396 // (Matcher::isSimpleConstant64 knows about the following optimizations.) | |
1397 if (Assembler::is_simm13(lo) && value == lo) { | |
1398 or3(G0, lo, d); | |
1399 } else if (hi == 0) { | |
1400 Assembler::sethi(lo, d); // hardware version zero-extends to upper 32 | |
1401 if (low10(lo) != 0) | |
1402 or3(d, low10(lo), d); | |
1403 } | |
1404 else if (hi == -1) { | |
1405 Assembler::sethi(~lo, d); // hardware version zero-extends to upper 32 | |
1406 xor3(d, low10(lo) ^ ~low10(~0), d); | |
1407 } | |
1408 else if (lo == 0) { | |
1409 if (Assembler::is_simm13(hi)) { | |
1410 or3(G0, hi, d); | |
1411 } else { | |
1412 Assembler::sethi(hi, d); // hardware version zero-extends to upper 32 | |
1413 if (low10(hi) != 0) | |
1414 or3(d, low10(hi), d); | |
1415 } | |
1416 sllx(d, 32, d); | |
1417 } | |
1418 else { | |
1419 Assembler::sethi(hi, tmp); | |
1420 Assembler::sethi(lo, d); // macro assembler version sign-extends | |
1421 if (low10(hi) != 0) | |
1422 or3 (tmp, low10(hi), tmp); | |
1423 if (low10(lo) != 0) | |
1424 or3 ( d, low10(lo), d); | |
1425 sllx(tmp, 32, tmp); | |
1426 or3 (d, tmp, d); | |
1427 } | |
1428 } | |
1429 | |
1430 // compute size in bytes of sparc frame, given | |
1431 // number of extraWords | |
1432 int MacroAssembler::total_frame_size_in_bytes(int extraWords) { | |
1433 | |
1434 int nWords = frame::memory_parameter_word_sp_offset; | |
1435 | |
1436 nWords += extraWords; | |
1437 | |
1438 if (nWords & 1) ++nWords; // round up to double-word | |
1439 | |
1440 return nWords * BytesPerWord; | |
1441 } | |
1442 | |
1443 | |
1444 // save_frame: given number of "extra" words in frame, | |
1445 // issue approp. save instruction (p 200, v8 manual) | |
1446 | |
1447 void MacroAssembler::save_frame(int extraWords = 0) { | |
1448 int delta = -total_frame_size_in_bytes(extraWords); | |
1449 if (is_simm13(delta)) { | |
1450 save(SP, delta, SP); | |
1451 } else { | |
1452 set(delta, G3_scratch); | |
1453 save(SP, G3_scratch, SP); | |
1454 } | |
1455 } | |
1456 | |
1457 | |
1458 void MacroAssembler::save_frame_c1(int size_in_bytes) { | |
1459 if (is_simm13(-size_in_bytes)) { | |
1460 save(SP, -size_in_bytes, SP); | |
1461 } else { | |
1462 set(-size_in_bytes, G3_scratch); | |
1463 save(SP, G3_scratch, SP); | |
1464 } | |
1465 } | |
1466 | |
1467 | |
1468 void MacroAssembler::save_frame_and_mov(int extraWords, | |
1469 Register s1, Register d1, | |
1470 Register s2, Register d2) { | |
1471 assert_not_delayed(); | |
1472 | |
1473 // The trick here is to use precisely the same memory word | |
1474 // that trap handlers also use to save the register. | |
1475 // This word cannot be used for any other purpose, but | |
1476 // it works fine to save the register's value, whether or not | |
1477 // an interrupt flushes register windows at any given moment! | |
1478 Address s1_addr; | |
1479 if (s1->is_valid() && (s1->is_in() || s1->is_local())) { | |
1480 s1_addr = s1->address_in_saved_window(); | |
1481 st_ptr(s1, s1_addr); | |
1482 } | |
1483 | |
1484 Address s2_addr; | |
1485 if (s2->is_valid() && (s2->is_in() || s2->is_local())) { | |
1486 s2_addr = s2->address_in_saved_window(); | |
1487 st_ptr(s2, s2_addr); | |
1488 } | |
1489 | |
1490 save_frame(extraWords); | |
1491 | |
1492 if (s1_addr.base() == SP) { | |
1493 ld_ptr(s1_addr.after_save(), d1); | |
1494 } else if (s1->is_valid()) { | |
1495 mov(s1->after_save(), d1); | |
1496 } | |
1497 | |
1498 if (s2_addr.base() == SP) { | |
1499 ld_ptr(s2_addr.after_save(), d2); | |
1500 } else if (s2->is_valid()) { | |
1501 mov(s2->after_save(), d2); | |
1502 } | |
1503 } | |
1504 | |
1505 | |
727 | 1506 AddressLiteral MacroAssembler::allocate_oop_address(jobject obj) { |
0 | 1507 assert(oop_recorder() != NULL, "this assembler needs an OopRecorder"); |
1508 int oop_index = oop_recorder()->allocate_index(obj); | |
727 | 1509 return AddressLiteral(obj, oop_Relocation::spec(oop_index)); |
0 | 1510 } |
1511 | |
1512 | |
727 | 1513 AddressLiteral MacroAssembler::constant_oop_address(jobject obj) { |
0 | 1514 assert(oop_recorder() != NULL, "this assembler needs an OopRecorder"); |
1515 int oop_index = oop_recorder()->find_index(obj); | |
727 | 1516 return AddressLiteral(obj, oop_Relocation::spec(oop_index)); |
0 | 1517 } |
1518 | |
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1519 void MacroAssembler::set_narrow_oop(jobject obj, Register d) { |
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1520 assert(oop_recorder() != NULL, "this assembler needs an OopRecorder"); |
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1521 int oop_index = oop_recorder()->find_index(obj); |
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1522 RelocationHolder rspec = oop_Relocation::spec(oop_index); |
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1523 |
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1524 assert_not_delayed(); |
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1525 // Relocation with special format (see relocInfo_sparc.hpp). |
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1526 relocate(rspec, 1); |
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1527 // Assembler::sethi(0x3fffff, d); |
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1528 emit_long( op(branch_op) | rd(d) | op2(sethi_op2) | hi22(0x3fffff) ); |
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1529 // Don't add relocation for 'add'. Do patching during 'sethi' processing. |
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1530 add(d, 0x3ff, d); |
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1531 |
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1532 } |
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1533 |
0 | 1534 |
1535 void MacroAssembler::align(int modulus) { | |
1536 while (offset() % modulus != 0) nop(); | |
1537 } | |
1538 | |
1539 | |
1540 void MacroAssembler::safepoint() { | |
1541 relocate(breakpoint_Relocation::spec(breakpoint_Relocation::safepoint)); | |
1542 } | |
1543 | |
1544 | |
1545 void RegistersForDebugging::print(outputStream* s) { | |
1546 int j; | |
1547 for ( j = 0; j < 8; ++j ) | |
1548 if ( j != 6 ) s->print_cr("i%d = 0x%.16lx", j, i[j]); | |
1549 else s->print_cr( "fp = 0x%.16lx", i[j]); | |
1550 s->cr(); | |
1551 | |
1552 for ( j = 0; j < 8; ++j ) | |
1553 s->print_cr("l%d = 0x%.16lx", j, l[j]); | |
1554 s->cr(); | |
1555 | |
1556 for ( j = 0; j < 8; ++j ) | |
1557 if ( j != 6 ) s->print_cr("o%d = 0x%.16lx", j, o[j]); | |
1558 else s->print_cr( "sp = 0x%.16lx", o[j]); | |
1559 s->cr(); | |
1560 | |
1561 for ( j = 0; j < 8; ++j ) | |
1562 s->print_cr("g%d = 0x%.16lx", j, g[j]); | |
1563 s->cr(); | |
1564 | |
1565 // print out floats with compression | |
1566 for (j = 0; j < 32; ) { | |
1567 jfloat val = f[j]; | |
1568 int last = j; | |
1569 for ( ; last+1 < 32; ++last ) { | |
1570 char b1[1024], b2[1024]; | |
1571 sprintf(b1, "%f", val); | |
1572 sprintf(b2, "%f", f[last+1]); | |
1573 if (strcmp(b1, b2)) | |
1574 break; | |
1575 } | |
1576 s->print("f%d", j); | |
1577 if ( j != last ) s->print(" - f%d", last); | |
1578 s->print(" = %f", val); | |
1579 s->fill_to(25); | |
1580 s->print_cr(" (0x%x)", val); | |
1581 j = last + 1; | |
1582 } | |
1583 s->cr(); | |
1584 | |
1585 // and doubles (evens only) | |
1586 for (j = 0; j < 32; ) { | |
1587 jdouble val = d[j]; | |
1588 int last = j; | |
1589 for ( ; last+1 < 32; ++last ) { | |
1590 char b1[1024], b2[1024]; | |
1591 sprintf(b1, "%f", val); | |
1592 sprintf(b2, "%f", d[last+1]); | |
1593 if (strcmp(b1, b2)) | |
1594 break; | |
1595 } | |
1596 s->print("d%d", 2 * j); | |
1597 if ( j != last ) s->print(" - d%d", last); | |
1598 s->print(" = %f", val); | |
1599 s->fill_to(30); | |
1600 s->print("(0x%x)", *(int*)&val); | |
1601 s->fill_to(42); | |
1602 s->print_cr("(0x%x)", *(1 + (int*)&val)); | |
1603 j = last + 1; | |
1604 } | |
1605 s->cr(); | |
1606 } | |
1607 | |
1608 void RegistersForDebugging::save_registers(MacroAssembler* a) { | |
1609 a->sub(FP, round_to(sizeof(RegistersForDebugging), sizeof(jdouble)) - STACK_BIAS, O0); | |
1610 a->flush_windows(); | |
1611 int i; | |
1612 for (i = 0; i < 8; ++i) { | |
1613 a->ld_ptr(as_iRegister(i)->address_in_saved_window().after_save(), L1); a->st_ptr( L1, O0, i_offset(i)); | |
1614 a->ld_ptr(as_lRegister(i)->address_in_saved_window().after_save(), L1); a->st_ptr( L1, O0, l_offset(i)); | |
1615 a->st_ptr(as_oRegister(i)->after_save(), O0, o_offset(i)); | |
1616 a->st_ptr(as_gRegister(i)->after_save(), O0, g_offset(i)); | |
1617 } | |
1618 for (i = 0; i < 32; ++i) { | |
1619 a->stf(FloatRegisterImpl::S, as_FloatRegister(i), O0, f_offset(i)); | |
1620 } | |
1621 for (i = 0; i < (VM_Version::v9_instructions_work() ? 64 : 32); i += 2) { | |
1622 a->stf(FloatRegisterImpl::D, as_FloatRegister(i), O0, d_offset(i)); | |
1623 } | |
1624 } | |
1625 | |
1626 void RegistersForDebugging::restore_registers(MacroAssembler* a, Register r) { | |
1627 for (int i = 1; i < 8; ++i) { | |
1628 a->ld_ptr(r, g_offset(i), as_gRegister(i)); | |
1629 } | |
1630 for (int j = 0; j < 32; ++j) { | |
1631 a->ldf(FloatRegisterImpl::S, O0, f_offset(j), as_FloatRegister(j)); | |
1632 } | |
1633 for (int k = 0; k < (VM_Version::v9_instructions_work() ? 64 : 32); k += 2) { | |
1634 a->ldf(FloatRegisterImpl::D, O0, d_offset(k), as_FloatRegister(k)); | |
1635 } | |
1636 } | |
1637 | |
1638 | |
1639 // pushes double TOS element of FPU stack on CPU stack; pops from FPU stack | |
1640 void MacroAssembler::push_fTOS() { | |
1641 // %%%%%% need to implement this | |
1642 } | |
1643 | |
1644 // pops double TOS element from CPU stack and pushes on FPU stack | |
1645 void MacroAssembler::pop_fTOS() { | |
1646 // %%%%%% need to implement this | |
1647 } | |
1648 | |
1649 void MacroAssembler::empty_FPU_stack() { | |
1650 // %%%%%% need to implement this | |
1651 } | |
1652 | |
1653 void MacroAssembler::_verify_oop(Register reg, const char* msg, const char * file, int line) { | |
1654 // plausibility check for oops | |
1655 if (!VerifyOops) return; | |
1656 | |
1657 if (reg == G0) return; // always NULL, which is always an oop | |
1658 | |
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1659 char buffer[64]; |
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1660 #ifdef COMPILER1 |
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1661 if (CommentedAssembly) { |
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1662 snprintf(buffer, sizeof(buffer), "verify_oop at %d", offset()); |
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1663 block_comment(buffer); |
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1664 } |
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1665 #endif |
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1666 |
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1667 int len = strlen(file) + strlen(msg) + 1 + 4; |
0 | 1668 sprintf(buffer, "%d", line); |
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1669 len += strlen(buffer); |
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1670 sprintf(buffer, " at offset %d ", offset()); |
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1671 len += strlen(buffer); |
0 | 1672 char * real_msg = new char[len]; |
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1673 sprintf(real_msg, "%s%s(%s:%d)", msg, buffer, file, line); |
0 | 1674 |
1675 // Call indirectly to solve generation ordering problem | |
727 | 1676 AddressLiteral a(StubRoutines::verify_oop_subroutine_entry_address()); |
0 | 1677 |
1678 // Make some space on stack above the current register window. | |
1679 // Enough to hold 8 64-bit registers. | |
1680 add(SP,-8*8,SP); | |
1681 | |
1682 // Save some 64-bit registers; a normal 'save' chops the heads off | |
1683 // of 64-bit longs in the 32-bit build. | |
1684 stx(O0,SP,frame::register_save_words*wordSize+STACK_BIAS+0*8); | |
1685 stx(O1,SP,frame::register_save_words*wordSize+STACK_BIAS+1*8); | |
1686 mov(reg,O0); // Move arg into O0; arg might be in O7 which is about to be crushed | |
1687 stx(O7,SP,frame::register_save_words*wordSize+STACK_BIAS+7*8); | |
1688 | |
1689 set((intptr_t)real_msg, O1); | |
1690 // Load address to call to into O7 | |
1691 load_ptr_contents(a, O7); | |
1692 // Register call to verify_oop_subroutine | |
1693 callr(O7, G0); | |
1694 delayed()->nop(); | |
1695 // recover frame size | |
1696 add(SP, 8*8,SP); | |
1697 } | |
1698 | |
1699 void MacroAssembler::_verify_oop_addr(Address addr, const char* msg, const char * file, int line) { | |
1700 // plausibility check for oops | |
1701 if (!VerifyOops) return; | |
1702 | |
1703 char buffer[64]; | |
1704 sprintf(buffer, "%d", line); | |
1705 int len = strlen(file) + strlen(msg) + 1 + 4 + strlen(buffer); | |
1706 sprintf(buffer, " at SP+%d ", addr.disp()); | |
1707 len += strlen(buffer); | |
1708 char * real_msg = new char[len]; | |
1709 sprintf(real_msg, "%s at SP+%d (%s:%d)", msg, addr.disp(), file, line); | |
1710 | |
1711 // Call indirectly to solve generation ordering problem | |
727 | 1712 AddressLiteral a(StubRoutines::verify_oop_subroutine_entry_address()); |
0 | 1713 |
1714 // Make some space on stack above the current register window. | |
1715 // Enough to hold 8 64-bit registers. | |
1716 add(SP,-8*8,SP); | |
1717 | |
1718 // Save some 64-bit registers; a normal 'save' chops the heads off | |
1719 // of 64-bit longs in the 32-bit build. | |
1720 stx(O0,SP,frame::register_save_words*wordSize+STACK_BIAS+0*8); | |
1721 stx(O1,SP,frame::register_save_words*wordSize+STACK_BIAS+1*8); | |
1722 ld_ptr(addr.base(), addr.disp() + 8*8, O0); // Load arg into O0; arg might be in O7 which is about to be crushed | |
1723 stx(O7,SP,frame::register_save_words*wordSize+STACK_BIAS+7*8); | |
1724 | |
1725 set((intptr_t)real_msg, O1); | |
1726 // Load address to call to into O7 | |
1727 load_ptr_contents(a, O7); | |
1728 // Register call to verify_oop_subroutine | |
1729 callr(O7, G0); | |
1730 delayed()->nop(); | |
1731 // recover frame size | |
1732 add(SP, 8*8,SP); | |
1733 } | |
1734 | |
1735 // side-door communication with signalHandler in os_solaris.cpp | |
1736 address MacroAssembler::_verify_oop_implicit_branch[3] = { NULL }; | |
1737 | |
1738 // This macro is expanded just once; it creates shared code. Contract: | |
1739 // receives an oop in O0. Must restore O0 & O7 from TLS. Must not smash ANY | |
1740 // registers, including flags. May not use a register 'save', as this blows | |
1741 // the high bits of the O-regs if they contain Long values. Acts as a 'leaf' | |
1742 // call. | |
1743 void MacroAssembler::verify_oop_subroutine() { | |
1744 assert( VM_Version::v9_instructions_work(), "VerifyOops not supported for V8" ); | |
1745 | |
1746 // Leaf call; no frame. | |
1747 Label succeed, fail, null_or_fail; | |
1748 | |
1749 // O0 and O7 were saved already (O0 in O0's TLS home, O7 in O5's TLS home). | |
1750 // O0 is now the oop to be checked. O7 is the return address. | |
1751 Register O0_obj = O0; | |
1752 | |
1753 // Save some more registers for temps. | |
1754 stx(O2,SP,frame::register_save_words*wordSize+STACK_BIAS+2*8); | |
1755 stx(O3,SP,frame::register_save_words*wordSize+STACK_BIAS+3*8); | |
1756 stx(O4,SP,frame::register_save_words*wordSize+STACK_BIAS+4*8); | |
1757 stx(O5,SP,frame::register_save_words*wordSize+STACK_BIAS+5*8); | |
1758 | |
1759 // Save flags | |
1760 Register O5_save_flags = O5; | |
1761 rdccr( O5_save_flags ); | |
1762 | |
1763 { // count number of verifies | |
1764 Register O2_adr = O2; | |
1765 Register O3_accum = O3; | |
727 | 1766 inc_counter(StubRoutines::verify_oop_count_addr(), O2_adr, O3_accum); |
0 | 1767 } |
1768 | |
1769 Register O2_mask = O2; | |
1770 Register O3_bits = O3; | |
1771 Register O4_temp = O4; | |
1772 | |
1773 // mark lower end of faulting range | |
1774 assert(_verify_oop_implicit_branch[0] == NULL, "set once"); | |
1775 _verify_oop_implicit_branch[0] = pc(); | |
1776 | |
1777 // We can't check the mark oop because it could be in the process of | |
1778 // locking or unlocking while this is running. | |
1779 set(Universe::verify_oop_mask (), O2_mask); | |
1780 set(Universe::verify_oop_bits (), O3_bits); | |
1781 | |
1782 // assert((obj & oop_mask) == oop_bits); | |
1783 and3(O0_obj, O2_mask, O4_temp); | |
1784 cmp(O4_temp, O3_bits); | |
1785 brx(notEqual, false, pn, null_or_fail); | |
1786 delayed()->nop(); | |
1787 | |
1788 if ((NULL_WORD & Universe::verify_oop_mask()) == Universe::verify_oop_bits()) { | |
1789 // the null_or_fail case is useless; must test for null separately | |
1790 br_null(O0_obj, false, pn, succeed); | |
1791 delayed()->nop(); | |
1792 } | |
1793 | |
1794 // Check the klassOop of this object for being in the right area of memory. | |
1795 // Cannot do the load in the delay above slot in case O0 is null | |
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1796 load_klass(O0_obj, O0_obj); |
0 | 1797 // assert((klass & klass_mask) == klass_bits); |
1798 if( Universe::verify_klass_mask() != Universe::verify_oop_mask() ) | |
1799 set(Universe::verify_klass_mask(), O2_mask); | |
1800 if( Universe::verify_klass_bits() != Universe::verify_oop_bits() ) | |
1801 set(Universe::verify_klass_bits(), O3_bits); | |
1802 and3(O0_obj, O2_mask, O4_temp); | |
1803 cmp(O4_temp, O3_bits); | |
1804 brx(notEqual, false, pn, fail); | |
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1805 delayed()->nop(); |
0 | 1806 // Check the klass's klass |
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1807 load_klass(O0_obj, O0_obj); |
0 | 1808 and3(O0_obj, O2_mask, O4_temp); |
1809 cmp(O4_temp, O3_bits); | |
1810 brx(notEqual, false, pn, fail); | |
1811 delayed()->wrccr( O5_save_flags ); // Restore CCR's | |
1812 | |
1813 // mark upper end of faulting range | |
1814 _verify_oop_implicit_branch[1] = pc(); | |
1815 | |
1816 //----------------------- | |
1817 // all tests pass | |
1818 bind(succeed); | |
1819 | |
1820 // Restore prior 64-bit registers | |
1821 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+0*8,O0); | |
1822 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+1*8,O1); | |
1823 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+2*8,O2); | |
1824 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+3*8,O3); | |
1825 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+4*8,O4); | |
1826 ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+5*8,O5); | |
1827 | |
1828 retl(); // Leaf return; restore prior O7 in delay slot | |
1829 delayed()->ldx(SP,frame::register_save_words*wordSize+STACK_BIAS+7*8,O7); | |
1830 | |
1831 //----------------------- | |
1832 bind(null_or_fail); // nulls are less common but OK | |
1833 br_null(O0_obj, false, pt, succeed); | |
1834 delayed()->wrccr( O5_save_flags ); // Restore CCR's | |
1835 | |
1836 //----------------------- | |
1837 // report failure: | |
1838 bind(fail); | |
1839 _verify_oop_implicit_branch[2] = pc(); | |
1840 | |
1841 wrccr( O5_save_flags ); // Restore CCR's | |
1842 | |
1843 save_frame(::round_to(sizeof(RegistersForDebugging) / BytesPerWord, 2)); | |
1844 | |
1845 // stop_subroutine expects message pointer in I1. | |
1846 mov(I1, O1); | |
1847 | |
1848 // Restore prior 64-bit registers | |
1849 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+0*8,I0); | |
1850 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+1*8,I1); | |
1851 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+2*8,I2); | |
1852 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+3*8,I3); | |
1853 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+4*8,I4); | |
1854 ldx(FP,frame::register_save_words*wordSize+STACK_BIAS+5*8,I5); | |
1855 | |
1856 // factor long stop-sequence into subroutine to save space | |
1857 assert(StubRoutines::Sparc::stop_subroutine_entry_address(), "hasn't been generated yet"); | |
1858 | |
1859 // call indirectly to solve generation ordering problem | |
727 | 1860 AddressLiteral al(StubRoutines::Sparc::stop_subroutine_entry_address()); |
1861 load_ptr_contents(al, O5); | |
0 | 1862 jmpl(O5, 0, O7); |
1863 delayed()->nop(); | |
1864 } | |
1865 | |
1866 | |
1867 void MacroAssembler::stop(const char* msg) { | |
1868 // save frame first to get O7 for return address | |
1869 // add one word to size in case struct is odd number of words long | |
1870 // It must be doubleword-aligned for storing doubles into it. | |
1871 | |
1872 save_frame(::round_to(sizeof(RegistersForDebugging) / BytesPerWord, 2)); | |
1873 | |
1874 // stop_subroutine expects message pointer in I1. | |
1875 set((intptr_t)msg, O1); | |
1876 | |
1877 // factor long stop-sequence into subroutine to save space | |
1878 assert(StubRoutines::Sparc::stop_subroutine_entry_address(), "hasn't been generated yet"); | |
1879 | |
1880 // call indirectly to solve generation ordering problem | |
727 | 1881 AddressLiteral a(StubRoutines::Sparc::stop_subroutine_entry_address()); |
0 | 1882 load_ptr_contents(a, O5); |
1883 jmpl(O5, 0, O7); | |
1884 delayed()->nop(); | |
1885 | |
1886 breakpoint_trap(); // make stop actually stop rather than writing | |
1887 // unnoticeable results in the output files. | |
1888 | |
1889 // restore(); done in callee to save space! | |
1890 } | |
1891 | |
1892 | |
1893 void MacroAssembler::warn(const char* msg) { | |
1894 save_frame(::round_to(sizeof(RegistersForDebugging) / BytesPerWord, 2)); | |
1895 RegistersForDebugging::save_registers(this); | |
1896 mov(O0, L0); | |
1897 set((intptr_t)msg, O0); | |
1898 call( CAST_FROM_FN_PTR(address, warning) ); | |
1899 delayed()->nop(); | |
1900 // ret(); | |
1901 // delayed()->restore(); | |
1902 RegistersForDebugging::restore_registers(this, L0); | |
1903 restore(); | |
1904 } | |
1905 | |
1906 | |
1907 void MacroAssembler::untested(const char* what) { | |
1908 // We must be able to turn interactive prompting off | |
1909 // in order to run automated test scripts on the VM | |
1910 // Use the flag ShowMessageBoxOnError | |
1911 | |
1912 char* b = new char[1024]; | |
1913 sprintf(b, "untested: %s", what); | |
1914 | |
1915 if ( ShowMessageBoxOnError ) stop(b); | |
1916 else warn(b); | |
1917 } | |
1918 | |
1919 | |
1920 void MacroAssembler::stop_subroutine() { | |
1921 RegistersForDebugging::save_registers(this); | |
1922 | |
1923 // for the sake of the debugger, stick a PC on the current frame | |
1924 // (this assumes that the caller has performed an extra "save") | |
1925 mov(I7, L7); | |
1926 add(O7, -7 * BytesPerInt, I7); | |
1927 | |
1928 save_frame(); // one more save to free up another O7 register | |
1929 mov(I0, O1); // addr of reg save area | |
1930 | |
1931 // We expect pointer to message in I1. Caller must set it up in O1 | |
1932 mov(I1, O0); // get msg | |
1933 call (CAST_FROM_FN_PTR(address, MacroAssembler::debug), relocInfo::runtime_call_type); | |
1934 delayed()->nop(); | |
1935 | |
1936 restore(); | |
1937 | |
1938 RegistersForDebugging::restore_registers(this, O0); | |
1939 | |
1940 save_frame(0); | |
1941 call(CAST_FROM_FN_PTR(address,breakpoint)); | |
1942 delayed()->nop(); | |
1943 restore(); | |
1944 | |
1945 mov(L7, I7); | |
1946 retl(); | |
1947 delayed()->restore(); // see stop above | |
1948 } | |
1949 | |
1950 | |
1951 void MacroAssembler::debug(char* msg, RegistersForDebugging* regs) { | |
1952 if ( ShowMessageBoxOnError ) { | |
1953 JavaThreadState saved_state = JavaThread::current()->thread_state(); | |
1954 JavaThread::current()->set_thread_state(_thread_in_vm); | |
1955 { | |
1956 // In order to get locks work, we need to fake a in_VM state | |
1957 ttyLocker ttyl; | |
1958 ::tty->print_cr("EXECUTION STOPPED: %s\n", msg); | |
1959 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { | |
1960 ::tty->print_cr("Interpreter::bytecode_counter = %d", BytecodeCounter::counter_value()); | |
1961 } | |
1962 if (os::message_box(msg, "Execution stopped, print registers?")) | |
1963 regs->print(::tty); | |
1964 } | |
1965 ThreadStateTransition::transition(JavaThread::current(), _thread_in_vm, saved_state); | |
1966 } | |
1967 else | |
1968 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", msg); | |
1969 assert(false, "error"); | |
1970 } | |
1971 | |
1972 | |
1973 #ifndef PRODUCT | |
1974 void MacroAssembler::test() { | |
1975 ResourceMark rm; | |
1976 | |
1977 CodeBuffer cb("test", 10000, 10000); | |
1978 MacroAssembler* a = new MacroAssembler(&cb); | |
1979 VM_Version::allow_all(); | |
1980 a->test_v9(); | |
1981 a->test_v8_onlys(); | |
1982 VM_Version::revert(); | |
1983 | |
1984 StubRoutines::Sparc::test_stop_entry()(); | |
1985 } | |
1986 #endif | |
1987 | |
1988 | |
1989 void MacroAssembler::calc_mem_param_words(Register Rparam_words, Register Rresult) { | |
1990 subcc( Rparam_words, Argument::n_register_parameters, Rresult); // how many mem words? | |
1991 Label no_extras; | |
1992 br( negative, true, pt, no_extras ); // if neg, clear reg | |
727 | 1993 delayed()->set(0, Rresult); // annuled, so only if taken |
0 | 1994 bind( no_extras ); |
1995 } | |
1996 | |
1997 | |
1998 void MacroAssembler::calc_frame_size(Register Rextra_words, Register Rresult) { | |
1999 #ifdef _LP64 | |
2000 add(Rextra_words, frame::memory_parameter_word_sp_offset, Rresult); | |
2001 #else | |
2002 add(Rextra_words, frame::memory_parameter_word_sp_offset + 1, Rresult); | |
2003 #endif | |
2004 bclr(1, Rresult); | |
2005 sll(Rresult, LogBytesPerWord, Rresult); // Rresult has total frame bytes | |
2006 } | |
2007 | |
2008 | |
2009 void MacroAssembler::calc_frame_size_and_save(Register Rextra_words, Register Rresult) { | |
2010 calc_frame_size(Rextra_words, Rresult); | |
2011 neg(Rresult); | |
2012 save(SP, Rresult, SP); | |
2013 } | |
2014 | |
2015 | |
2016 // --------------------------------------------------------- | |
2017 Assembler::RCondition cond2rcond(Assembler::Condition c) { | |
2018 switch (c) { | |
2019 /*case zero: */ | |
2020 case Assembler::equal: return Assembler::rc_z; | |
2021 case Assembler::lessEqual: return Assembler::rc_lez; | |
2022 case Assembler::less: return Assembler::rc_lz; | |
2023 /*case notZero:*/ | |
2024 case Assembler::notEqual: return Assembler::rc_nz; | |
2025 case Assembler::greater: return Assembler::rc_gz; | |
2026 case Assembler::greaterEqual: return Assembler::rc_gez; | |
2027 } | |
2028 ShouldNotReachHere(); | |
2029 return Assembler::rc_z; | |
2030 } | |
2031 | |
2032 // compares register with zero and branches. NOT FOR USE WITH 64-bit POINTERS | |
2033 void MacroAssembler::br_zero( Condition c, bool a, Predict p, Register s1, Label& L) { | |
2034 tst(s1); | |
2035 br (c, a, p, L); | |
2036 } | |
2037 | |
2038 | |
2039 // Compares a pointer register with zero and branches on null. | |
2040 // Does a test & branch on 32-bit systems and a register-branch on 64-bit. | |
2041 void MacroAssembler::br_null( Register s1, bool a, Predict p, Label& L ) { | |
2042 assert_not_delayed(); | |
2043 #ifdef _LP64 | |
2044 bpr( rc_z, a, p, s1, L ); | |
2045 #else | |
2046 tst(s1); | |
2047 br ( zero, a, p, L ); | |
2048 #endif | |
2049 } | |
2050 | |
2051 void MacroAssembler::br_notnull( Register s1, bool a, Predict p, Label& L ) { | |
2052 assert_not_delayed(); | |
2053 #ifdef _LP64 | |
2054 bpr( rc_nz, a, p, s1, L ); | |
2055 #else | |
2056 tst(s1); | |
2057 br ( notZero, a, p, L ); | |
2058 #endif | |
2059 } | |
2060 | |
342
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2061 void MacroAssembler::br_on_reg_cond( RCondition rc, bool a, Predict p, |
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2062 Register s1, address d, |
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2063 relocInfo::relocType rt ) { |
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2064 if (VM_Version::v9_instructions_work()) { |
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2065 bpr(rc, a, p, s1, d, rt); |
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2066 } else { |
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2067 tst(s1); |
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2068 br(reg_cond_to_cc_cond(rc), a, p, d, rt); |
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2069 } |
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2070 } |
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2071 |
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2072 void MacroAssembler::br_on_reg_cond( RCondition rc, bool a, Predict p, |
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2073 Register s1, Label& L ) { |
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2074 if (VM_Version::v9_instructions_work()) { |
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2075 bpr(rc, a, p, s1, L); |
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2076 } else { |
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2077 tst(s1); |
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2078 br(reg_cond_to_cc_cond(rc), a, p, L); |
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2079 } |
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2080 } |
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2081 |
0 | 2082 |
2083 // instruction sequences factored across compiler & interpreter | |
2084 | |
2085 | |
2086 void MacroAssembler::lcmp( Register Ra_hi, Register Ra_low, | |
2087 Register Rb_hi, Register Rb_low, | |
2088 Register Rresult) { | |
2089 | |
2090 Label check_low_parts, done; | |
2091 | |
2092 cmp(Ra_hi, Rb_hi ); // compare hi parts | |
2093 br(equal, true, pt, check_low_parts); | |
2094 delayed()->cmp(Ra_low, Rb_low); // test low parts | |
2095 | |
2096 // And, with an unsigned comparison, it does not matter if the numbers | |
2097 // are negative or not. | |
2098 // E.g., -2 cmp -1: the low parts are 0xfffffffe and 0xffffffff. | |
2099 // The second one is bigger (unsignedly). | |
2100 | |
2101 // Other notes: The first move in each triplet can be unconditional | |
2102 // (and therefore probably prefetchable). | |
2103 // And the equals case for the high part does not need testing, | |
2104 // since that triplet is reached only after finding the high halves differ. | |
2105 | |
2106 if (VM_Version::v9_instructions_work()) { | |
2107 | |
2108 mov ( -1, Rresult); | |
2109 ba( false, done ); delayed()-> movcc(greater, false, icc, 1, Rresult); | |
2110 } | |
2111 else { | |
2112 br(less, true, pt, done); delayed()-> set(-1, Rresult); | |
2113 br(greater, true, pt, done); delayed()-> set( 1, Rresult); | |
2114 } | |
2115 | |
2116 bind( check_low_parts ); | |
2117 | |
2118 if (VM_Version::v9_instructions_work()) { | |
2119 mov( -1, Rresult); | |
2120 movcc(equal, false, icc, 0, Rresult); | |
2121 movcc(greaterUnsigned, false, icc, 1, Rresult); | |
2122 } | |
2123 else { | |
2124 set(-1, Rresult); | |
2125 br(equal, true, pt, done); delayed()->set( 0, Rresult); | |
2126 br(greaterUnsigned, true, pt, done); delayed()->set( 1, Rresult); | |
2127 } | |
2128 bind( done ); | |
2129 } | |
2130 | |
2131 void MacroAssembler::lneg( Register Rhi, Register Rlow ) { | |
2132 subcc( G0, Rlow, Rlow ); | |
2133 subc( G0, Rhi, Rhi ); | |
2134 } | |
2135 | |
2136 void MacroAssembler::lshl( Register Rin_high, Register Rin_low, | |
2137 Register Rcount, | |
2138 Register Rout_high, Register Rout_low, | |
2139 Register Rtemp ) { | |
2140 | |
2141 | |
2142 Register Ralt_count = Rtemp; | |
2143 Register Rxfer_bits = Rtemp; | |
2144 | |
2145 assert( Ralt_count != Rin_high | |
2146 && Ralt_count != Rin_low | |
2147 && Ralt_count != Rcount | |
2148 && Rxfer_bits != Rin_low | |
2149 && Rxfer_bits != Rin_high | |
2150 && Rxfer_bits != Rcount | |
2151 && Rxfer_bits != Rout_low | |
2152 && Rout_low != Rin_high, | |
2153 "register alias checks"); | |
2154 | |
2155 Label big_shift, done; | |
2156 | |
2157 // This code can be optimized to use the 64 bit shifts in V9. | |
2158 // Here we use the 32 bit shifts. | |
2159 | |
2160 and3( Rcount, 0x3f, Rcount); // take least significant 6 bits | |
2161 subcc(Rcount, 31, Ralt_count); | |
2162 br(greater, true, pn, big_shift); | |
2163 delayed()-> | |
2164 dec(Ralt_count); | |
2165 | |
2166 // shift < 32 bits, Ralt_count = Rcount-31 | |
2167 | |
2168 // We get the transfer bits by shifting right by 32-count the low | |
2169 // register. This is done by shifting right by 31-count and then by one | |
2170 // more to take care of the special (rare) case where count is zero | |
2171 // (shifting by 32 would not work). | |
2172 | |
2173 neg( Ralt_count ); | |
2174 | |
2175 // The order of the next two instructions is critical in the case where | |
2176 // Rin and Rout are the same and should not be reversed. | |
2177 | |
2178 srl( Rin_low, Ralt_count, Rxfer_bits ); // shift right by 31-count | |
2179 if (Rcount != Rout_low) { | |
2180 sll( Rin_low, Rcount, Rout_low ); // low half | |
2181 } | |
2182 sll( Rin_high, Rcount, Rout_high ); | |
2183 if (Rcount == Rout_low) { | |
2184 sll( Rin_low, Rcount, Rout_low ); // low half | |
2185 } | |
2186 srl( Rxfer_bits, 1, Rxfer_bits ); // shift right by one more | |
2187 ba (false, done); | |
2188 delayed()-> | |
2189 or3( Rout_high, Rxfer_bits, Rout_high); // new hi value: or in shifted old hi part and xfer from low | |
2190 | |
2191 // shift >= 32 bits, Ralt_count = Rcount-32 | |
2192 bind(big_shift); | |
2193 sll( Rin_low, Ralt_count, Rout_high ); | |
2194 clr( Rout_low ); | |
2195 | |
2196 bind(done); | |
2197 } | |
2198 | |
2199 | |
2200 void MacroAssembler::lshr( Register Rin_high, Register Rin_low, | |
2201 Register Rcount, | |
2202 Register Rout_high, Register Rout_low, | |
2203 Register Rtemp ) { | |
2204 | |
2205 Register Ralt_count = Rtemp; | |
2206 Register Rxfer_bits = Rtemp; | |
2207 | |
2208 assert( Ralt_count != Rin_high | |
2209 && Ralt_count != Rin_low | |
2210 && Ralt_count != Rcount | |
2211 && Rxfer_bits != Rin_low | |
2212 && Rxfer_bits != Rin_high | |
2213 && Rxfer_bits != Rcount | |
2214 && Rxfer_bits != Rout_high | |
2215 && Rout_high != Rin_low, | |
2216 "register alias checks"); | |
2217 | |
2218 Label big_shift, done; | |
2219 | |
2220 // This code can be optimized to use the 64 bit shifts in V9. | |
2221 // Here we use the 32 bit shifts. | |
2222 | |
2223 and3( Rcount, 0x3f, Rcount); // take least significant 6 bits | |
2224 subcc(Rcount, 31, Ralt_count); | |
2225 br(greater, true, pn, big_shift); | |
2226 delayed()->dec(Ralt_count); | |
2227 | |
2228 // shift < 32 bits, Ralt_count = Rcount-31 | |
2229 | |
2230 // We get the transfer bits by shifting left by 32-count the high | |
2231 // register. This is done by shifting left by 31-count and then by one | |
2232 // more to take care of the special (rare) case where count is zero | |
2233 // (shifting by 32 would not work). | |
2234 | |
2235 neg( Ralt_count ); | |
2236 if (Rcount != Rout_low) { | |
2237 srl( Rin_low, Rcount, Rout_low ); | |
2238 } | |
2239 | |
2240 // The order of the next two instructions is critical in the case where | |
2241 // Rin and Rout are the same and should not be reversed. | |
2242 | |
2243 sll( Rin_high, Ralt_count, Rxfer_bits ); // shift left by 31-count | |
2244 sra( Rin_high, Rcount, Rout_high ); // high half | |
2245 sll( Rxfer_bits, 1, Rxfer_bits ); // shift left by one more | |
2246 if (Rcount == Rout_low) { | |
2247 srl( Rin_low, Rcount, Rout_low ); | |
2248 } | |
2249 ba (false, done); | |
2250 delayed()-> | |
2251 or3( Rout_low, Rxfer_bits, Rout_low ); // new low value: or shifted old low part and xfer from high | |
2252 | |
2253 // shift >= 32 bits, Ralt_count = Rcount-32 | |
2254 bind(big_shift); | |
2255 | |
2256 sra( Rin_high, Ralt_count, Rout_low ); | |
2257 sra( Rin_high, 31, Rout_high ); // sign into hi | |
2258 | |
2259 bind( done ); | |
2260 } | |
2261 | |
2262 | |
2263 | |
2264 void MacroAssembler::lushr( Register Rin_high, Register Rin_low, | |
2265 Register Rcount, | |
2266 Register Rout_high, Register Rout_low, | |
2267 Register Rtemp ) { | |
2268 | |
2269 Register Ralt_count = Rtemp; | |
2270 Register Rxfer_bits = Rtemp; | |
2271 | |
2272 assert( Ralt_count != Rin_high | |
2273 && Ralt_count != Rin_low | |
2274 && Ralt_count != Rcount | |
2275 && Rxfer_bits != Rin_low | |
2276 && Rxfer_bits != Rin_high | |
2277 && Rxfer_bits != Rcount | |
2278 && Rxfer_bits != Rout_high | |
2279 && Rout_high != Rin_low, | |
2280 "register alias checks"); | |
2281 | |
2282 Label big_shift, done; | |
2283 | |
2284 // This code can be optimized to use the 64 bit shifts in V9. | |
2285 // Here we use the 32 bit shifts. | |
2286 | |
2287 and3( Rcount, 0x3f, Rcount); // take least significant 6 bits | |
2288 subcc(Rcount, 31, Ralt_count); | |
2289 br(greater, true, pn, big_shift); | |
2290 delayed()->dec(Ralt_count); | |
2291 | |
2292 // shift < 32 bits, Ralt_count = Rcount-31 | |
2293 | |
2294 // We get the transfer bits by shifting left by 32-count the high | |
2295 // register. This is done by shifting left by 31-count and then by one | |
2296 // more to take care of the special (rare) case where count is zero | |
2297 // (shifting by 32 would not work). | |
2298 | |
2299 neg( Ralt_count ); | |
2300 if (Rcount != Rout_low) { | |
2301 srl( Rin_low, Rcount, Rout_low ); | |
2302 } | |
2303 | |
2304 // The order of the next two instructions is critical in the case where | |
2305 // Rin and Rout are the same and should not be reversed. | |
2306 | |
2307 sll( Rin_high, Ralt_count, Rxfer_bits ); // shift left by 31-count | |
2308 srl( Rin_high, Rcount, Rout_high ); // high half | |
2309 sll( Rxfer_bits, 1, Rxfer_bits ); // shift left by one more | |
2310 if (Rcount == Rout_low) { | |
2311 srl( Rin_low, Rcount, Rout_low ); | |
2312 } | |
2313 ba (false, done); | |
2314 delayed()-> | |
2315 or3( Rout_low, Rxfer_bits, Rout_low ); // new low value: or shifted old low part and xfer from high | |
2316 | |
2317 // shift >= 32 bits, Ralt_count = Rcount-32 | |
2318 bind(big_shift); | |
2319 | |
2320 srl( Rin_high, Ralt_count, Rout_low ); | |
2321 clr( Rout_high ); | |
2322 | |
2323 bind( done ); | |
2324 } | |
2325 | |
2326 #ifdef _LP64 | |
2327 void MacroAssembler::lcmp( Register Ra, Register Rb, Register Rresult) { | |
2328 cmp(Ra, Rb); | |
2329 mov( -1, Rresult); | |
2330 movcc(equal, false, xcc, 0, Rresult); | |
2331 movcc(greater, false, xcc, 1, Rresult); | |
2332 } | |
2333 #endif | |
2334 | |
2335 | |
1503 | 2336 void MacroAssembler::load_sized_value(Address src, Register dst, |
2337 size_t size_in_bytes, bool is_signed) { | |
2338 switch (size_in_bytes) { | |
2339 case 8: ldx(src, dst); break; | |
2340 case 4: ld( src, dst); break; | |
2341 case 2: is_signed ? ldsh(src, dst) : lduh(src, dst); break; | |
2342 case 1: is_signed ? ldsb(src, dst) : ldub(src, dst); break; | |
2343 default: ShouldNotReachHere(); | |
2344 } | |
2345 } | |
2346 | |
2347 | |
0 | 2348 void MacroAssembler::float_cmp( bool is_float, int unordered_result, |
2349 FloatRegister Fa, FloatRegister Fb, | |
2350 Register Rresult) { | |
2351 | |
2352 fcmp(is_float ? FloatRegisterImpl::S : FloatRegisterImpl::D, fcc0, Fa, Fb); | |
2353 | |
2354 Condition lt = unordered_result == -1 ? f_unorderedOrLess : f_less; | |
2355 Condition eq = f_equal; | |
2356 Condition gt = unordered_result == 1 ? f_unorderedOrGreater : f_greater; | |
2357 | |
2358 if (VM_Version::v9_instructions_work()) { | |
2359 | |
2360 mov( -1, Rresult ); | |
2361 movcc( eq, true, fcc0, 0, Rresult ); | |
2362 movcc( gt, true, fcc0, 1, Rresult ); | |
2363 | |
2364 } else { | |
2365 Label done; | |
2366 | |
2367 set( -1, Rresult ); | |
2368 //fb(lt, true, pn, done); delayed()->set( -1, Rresult ); | |
2369 fb( eq, true, pn, done); delayed()->set( 0, Rresult ); | |
2370 fb( gt, true, pn, done); delayed()->set( 1, Rresult ); | |
2371 | |
2372 bind (done); | |
2373 } | |
2374 } | |
2375 | |
2376 | |
2377 void MacroAssembler::fneg( FloatRegisterImpl::Width w, FloatRegister s, FloatRegister d) | |
2378 { | |
2379 if (VM_Version::v9_instructions_work()) { | |
2380 Assembler::fneg(w, s, d); | |
2381 } else { | |
2382 if (w == FloatRegisterImpl::S) { | |
2383 Assembler::fneg(w, s, d); | |
2384 } else if (w == FloatRegisterImpl::D) { | |
2385 // number() does a sanity check on the alignment. | |
2386 assert(((s->encoding(FloatRegisterImpl::D) & 1) == 0) && | |
2387 ((d->encoding(FloatRegisterImpl::D) & 1) == 0), "float register alignment check"); | |
2388 | |
2389 Assembler::fneg(FloatRegisterImpl::S, s, d); | |
2390 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor()); | |
2391 } else { | |
2392 assert(w == FloatRegisterImpl::Q, "Invalid float register width"); | |
2393 | |
2394 // number() does a sanity check on the alignment. | |
2395 assert(((s->encoding(FloatRegisterImpl::D) & 3) == 0) && | |
2396 ((d->encoding(FloatRegisterImpl::D) & 3) == 0), "float register alignment check"); | |
2397 | |
2398 Assembler::fneg(FloatRegisterImpl::S, s, d); | |
2399 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor()); | |
2400 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor(), d->successor()->successor()); | |
2401 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor()->successor(), d->successor()->successor()->successor()); | |
2402 } | |
2403 } | |
2404 } | |
2405 | |
2406 void MacroAssembler::fmov( FloatRegisterImpl::Width w, FloatRegister s, FloatRegister d) | |
2407 { | |
2408 if (VM_Version::v9_instructions_work()) { | |
2409 Assembler::fmov(w, s, d); | |
2410 } else { | |
2411 if (w == FloatRegisterImpl::S) { | |
2412 Assembler::fmov(w, s, d); | |
2413 } else if (w == FloatRegisterImpl::D) { | |
2414 // number() does a sanity check on the alignment. | |
2415 assert(((s->encoding(FloatRegisterImpl::D) & 1) == 0) && | |
2416 ((d->encoding(FloatRegisterImpl::D) & 1) == 0), "float register alignment check"); | |
2417 | |
2418 Assembler::fmov(FloatRegisterImpl::S, s, d); | |
2419 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor()); | |
2420 } else { | |
2421 assert(w == FloatRegisterImpl::Q, "Invalid float register width"); | |
2422 | |
2423 // number() does a sanity check on the alignment. | |
2424 assert(((s->encoding(FloatRegisterImpl::D) & 3) == 0) && | |
2425 ((d->encoding(FloatRegisterImpl::D) & 3) == 0), "float register alignment check"); | |
2426 | |
2427 Assembler::fmov(FloatRegisterImpl::S, s, d); | |
2428 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor()); | |
2429 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor(), d->successor()->successor()); | |
2430 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor()->successor(), d->successor()->successor()->successor()); | |
2431 } | |
2432 } | |
2433 } | |
2434 | |
2435 void MacroAssembler::fabs( FloatRegisterImpl::Width w, FloatRegister s, FloatRegister d) | |
2436 { | |
2437 if (VM_Version::v9_instructions_work()) { | |
2438 Assembler::fabs(w, s, d); | |
2439 } else { | |
2440 if (w == FloatRegisterImpl::S) { | |
2441 Assembler::fabs(w, s, d); | |
2442 } else if (w == FloatRegisterImpl::D) { | |
2443 // number() does a sanity check on the alignment. | |
2444 assert(((s->encoding(FloatRegisterImpl::D) & 1) == 0) && | |
2445 ((d->encoding(FloatRegisterImpl::D) & 1) == 0), "float register alignment check"); | |
2446 | |
2447 Assembler::fabs(FloatRegisterImpl::S, s, d); | |
2448 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor()); | |
2449 } else { | |
2450 assert(w == FloatRegisterImpl::Q, "Invalid float register width"); | |
2451 | |
2452 // number() does a sanity check on the alignment. | |
2453 assert(((s->encoding(FloatRegisterImpl::D) & 3) == 0) && | |
2454 ((d->encoding(FloatRegisterImpl::D) & 3) == 0), "float register alignment check"); | |
2455 | |
2456 Assembler::fabs(FloatRegisterImpl::S, s, d); | |
2457 Assembler::fmov(FloatRegisterImpl::S, s->successor(), d->successor()); | |
2458 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor(), d->successor()->successor()); | |
2459 Assembler::fmov(FloatRegisterImpl::S, s->successor()->successor()->successor(), d->successor()->successor()->successor()); | |
2460 } | |
2461 } | |
2462 } | |
2463 | |
2464 void MacroAssembler::save_all_globals_into_locals() { | |
2465 mov(G1,L1); | |
2466 mov(G2,L2); | |
2467 mov(G3,L3); | |
2468 mov(G4,L4); | |
2469 mov(G5,L5); | |
2470 mov(G6,L6); | |
2471 mov(G7,L7); | |
2472 } | |
2473 | |
2474 void MacroAssembler::restore_globals_from_locals() { | |
2475 mov(L1,G1); | |
2476 mov(L2,G2); | |
2477 mov(L3,G3); | |
2478 mov(L4,G4); | |
2479 mov(L5,G5); | |
2480 mov(L6,G6); | |
2481 mov(L7,G7); | |
2482 } | |
2483 | |
2484 // Use for 64 bit operation. | |
2485 void MacroAssembler::casx_under_lock(Register top_ptr_reg, Register top_reg, Register ptr_reg, address lock_addr, bool use_call_vm) | |
2486 { | |
2487 // store ptr_reg as the new top value | |
2488 #ifdef _LP64 | |
2489 casx(top_ptr_reg, top_reg, ptr_reg); | |
2490 #else | |
2491 cas_under_lock(top_ptr_reg, top_reg, ptr_reg, lock_addr, use_call_vm); | |
2492 #endif // _LP64 | |
2493 } | |
2494 | |
2495 // [RGV] This routine does not handle 64 bit operations. | |
2496 // use casx_under_lock() or casx directly!!! | |
2497 void MacroAssembler::cas_under_lock(Register top_ptr_reg, Register top_reg, Register ptr_reg, address lock_addr, bool use_call_vm) | |
2498 { | |
2499 // store ptr_reg as the new top value | |
2500 if (VM_Version::v9_instructions_work()) { | |
2501 cas(top_ptr_reg, top_reg, ptr_reg); | |
2502 } else { | |
2503 | |
2504 // If the register is not an out nor global, it is not visible | |
2505 // after the save. Allocate a register for it, save its | |
2506 // value in the register save area (the save may not flush | |
2507 // registers to the save area). | |
2508 | |
2509 Register top_ptr_reg_after_save; | |
2510 Register top_reg_after_save; | |
2511 Register ptr_reg_after_save; | |
2512 | |
2513 if (top_ptr_reg->is_out() || top_ptr_reg->is_global()) { | |
2514 top_ptr_reg_after_save = top_ptr_reg->after_save(); | |
2515 } else { | |
2516 Address reg_save_addr = top_ptr_reg->address_in_saved_window(); | |
2517 top_ptr_reg_after_save = L0; | |
2518 st(top_ptr_reg, reg_save_addr); | |
2519 } | |
2520 | |
2521 if (top_reg->is_out() || top_reg->is_global()) { | |
2522 top_reg_after_save = top_reg->after_save(); | |
2523 } else { | |
2524 Address reg_save_addr = top_reg->address_in_saved_window(); | |
2525 top_reg_after_save = L1; | |
2526 st(top_reg, reg_save_addr); | |
2527 } | |
2528 | |
2529 if (ptr_reg->is_out() || ptr_reg->is_global()) { | |
2530 ptr_reg_after_save = ptr_reg->after_save(); | |
2531 } else { | |
2532 Address reg_save_addr = ptr_reg->address_in_saved_window(); | |
2533 ptr_reg_after_save = L2; | |
2534 st(ptr_reg, reg_save_addr); | |
2535 } | |
2536 | |
2537 const Register& lock_reg = L3; | |
2538 const Register& lock_ptr_reg = L4; | |
2539 const Register& value_reg = L5; | |
2540 const Register& yield_reg = L6; | |
2541 const Register& yieldall_reg = L7; | |
2542 | |
2543 save_frame(); | |
2544 | |
2545 if (top_ptr_reg_after_save == L0) { | |
2546 ld(top_ptr_reg->address_in_saved_window().after_save(), top_ptr_reg_after_save); | |
2547 } | |
2548 | |
2549 if (top_reg_after_save == L1) { | |
2550 ld(top_reg->address_in_saved_window().after_save(), top_reg_after_save); | |
2551 } | |
2552 | |
2553 if (ptr_reg_after_save == L2) { | |
2554 ld(ptr_reg->address_in_saved_window().after_save(), ptr_reg_after_save); | |
2555 } | |
2556 | |
2557 Label(retry_get_lock); | |
2558 Label(not_same); | |
2559 Label(dont_yield); | |
2560 | |
2561 assert(lock_addr, "lock_address should be non null for v8"); | |
2562 set((intptr_t)lock_addr, lock_ptr_reg); | |
2563 // Initialize yield counter | |
2564 mov(G0,yield_reg); | |
2565 mov(G0, yieldall_reg); | |
2566 set(StubRoutines::Sparc::locked, lock_reg); | |
2567 | |
2568 bind(retry_get_lock); | |
2569 cmp(yield_reg, V8AtomicOperationUnderLockSpinCount); | |
2570 br(Assembler::less, false, Assembler::pt, dont_yield); | |
2571 delayed()->nop(); | |
2572 | |
2573 if(use_call_vm) { | |
2574 Untested("Need to verify global reg consistancy"); | |
2575 call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::yield_all), yieldall_reg); | |
2576 } else { | |
2577 // Save the regs and make space for a C call | |
2578 save(SP, -96, SP); | |
2579 save_all_globals_into_locals(); | |
2580 call(CAST_FROM_FN_PTR(address,os::yield_all)); | |
2581 delayed()->mov(yieldall_reg, O0); | |
2582 restore_globals_from_locals(); | |
2583 restore(); | |
2584 } | |
2585 | |
2586 // reset the counter | |
2587 mov(G0,yield_reg); | |
2588 add(yieldall_reg, 1, yieldall_reg); | |
2589 | |
2590 bind(dont_yield); | |
2591 // try to get lock | |
2592 swap(lock_ptr_reg, 0, lock_reg); | |
2593 | |
2594 // did we get the lock? | |
2595 cmp(lock_reg, StubRoutines::Sparc::unlocked); | |
2596 br(Assembler::notEqual, true, Assembler::pn, retry_get_lock); | |
2597 delayed()->add(yield_reg,1,yield_reg); | |
2598 | |
2599 // yes, got lock. do we have the same top? | |
2600 ld(top_ptr_reg_after_save, 0, value_reg); | |
2601 cmp(value_reg, top_reg_after_save); | |
2602 br(Assembler::notEqual, false, Assembler::pn, not_same); | |
2603 delayed()->nop(); | |
2604 | |
2605 // yes, same top. | |
2606 st(ptr_reg_after_save, top_ptr_reg_after_save, 0); | |
2607 membar(Assembler::StoreStore); | |
2608 | |
2609 bind(not_same); | |
2610 mov(value_reg, ptr_reg_after_save); | |
2611 st(lock_reg, lock_ptr_reg, 0); // unlock | |
2612 | |
2613 restore(); | |
2614 } | |
2615 } | |
2616 | |
665
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2617 RegisterOrConstant MacroAssembler::delayed_value_impl(intptr_t* delayed_value_addr, |
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2618 Register tmp, |
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2619 int offset) { |
622
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2620 intptr_t value = *delayed_value_addr; |
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2621 if (value != 0) |
665
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2622 return RegisterOrConstant(value + offset); |
622
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2623 |
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2624 // load indirectly to solve generation ordering problem |
727 | 2625 AddressLiteral a(delayed_value_addr); |
622
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2626 load_ptr_contents(a, tmp); |
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2627 |
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2628 #ifdef ASSERT |
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2629 tst(tmp); |
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2630 breakpoint_trap(zero, xcc); |
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2631 #endif |
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2632 |
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2633 if (offset != 0) |
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2634 add(tmp, offset, tmp); |
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2635 |
665
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2636 return RegisterOrConstant(tmp); |
622
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2637 } |
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2638 |
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2639 |
1503 | 2640 RegisterOrConstant MacroAssembler::regcon_andn_ptr(RegisterOrConstant s1, RegisterOrConstant s2, RegisterOrConstant d, Register temp) { |
2641 assert(d.register_or_noreg() != G0, "lost side effect"); | |
2642 if ((s2.is_constant() && s2.as_constant() == 0) || | |
2643 (s2.is_register() && s2.as_register() == G0)) { | |
2644 // Do nothing, just move value. | |
2645 if (s1.is_register()) { | |
2646 if (d.is_constant()) d = temp; | |
2647 mov(s1.as_register(), d.as_register()); | |
2648 return d; | |
2649 } else { | |
2650 return s1; | |
2651 } | |
2652 } | |
2653 | |
2654 if (s1.is_register()) { | |
2655 assert_different_registers(s1.as_register(), temp); | |
2656 if (d.is_constant()) d = temp; | |
2657 andn(s1.as_register(), ensure_simm13_or_reg(s2, temp), d.as_register()); | |
2658 return d; | |
623
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2659 } else { |
1503 | 2660 if (s2.is_register()) { |
2661 assert_different_registers(s2.as_register(), temp); | |
2662 if (d.is_constant()) d = temp; | |
2663 set(s1.as_constant(), temp); | |
2664 andn(temp, s2.as_register(), d.as_register()); | |
2665 return d; | |
2666 } else { | |
2667 intptr_t res = s1.as_constant() & ~s2.as_constant(); | |
2668 return res; | |
2669 } | |
623
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2670 } |
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2671 } |
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2672 |
1503 | 2673 RegisterOrConstant MacroAssembler::regcon_inc_ptr(RegisterOrConstant s1, RegisterOrConstant s2, RegisterOrConstant d, Register temp) { |
2674 assert(d.register_or_noreg() != G0, "lost side effect"); | |
2675 if ((s2.is_constant() && s2.as_constant() == 0) || | |
2676 (s2.is_register() && s2.as_register() == G0)) { | |
2677 // Do nothing, just move value. | |
2678 if (s1.is_register()) { | |
2679 if (d.is_constant()) d = temp; | |
2680 mov(s1.as_register(), d.as_register()); | |
2681 return d; | |
2682 } else { | |
2683 return s1; | |
2684 } | |
2685 } | |
2686 | |
2687 if (s1.is_register()) { | |
2688 assert_different_registers(s1.as_register(), temp); | |
2689 if (d.is_constant()) d = temp; | |
2690 add(s1.as_register(), ensure_simm13_or_reg(s2, temp), d.as_register()); | |
2691 return d; | |
623
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2692 } else { |
1503 | 2693 if (s2.is_register()) { |
2694 assert_different_registers(s2.as_register(), temp); | |
2695 if (d.is_constant()) d = temp; | |
2696 add(s2.as_register(), ensure_simm13_or_reg(s1, temp), d.as_register()); | |
2697 return d; | |
2698 } else { | |
2699 intptr_t res = s1.as_constant() + s2.as_constant(); | |
2700 return res; | |
2701 } | |
2702 } | |
2703 } | |
2704 | |
2705 RegisterOrConstant MacroAssembler::regcon_sll_ptr(RegisterOrConstant s1, RegisterOrConstant s2, RegisterOrConstant d, Register temp) { | |
2706 assert(d.register_or_noreg() != G0, "lost side effect"); | |
2707 if (!is_simm13(s2.constant_or_zero())) | |
2708 s2 = (s2.as_constant() & 0xFF); | |
2709 if ((s2.is_constant() && s2.as_constant() == 0) || | |
2710 (s2.is_register() && s2.as_register() == G0)) { | |
2711 // Do nothing, just move value. | |
2712 if (s1.is_register()) { | |
2713 if (d.is_constant()) d = temp; | |
2714 mov(s1.as_register(), d.as_register()); | |
2715 return d; | |
2716 } else { | |
2717 return s1; | |
2718 } | |
2719 } | |
2720 | |
2721 if (s1.is_register()) { | |
2722 assert_different_registers(s1.as_register(), temp); | |
2723 if (d.is_constant()) d = temp; | |
2724 sll_ptr(s1.as_register(), ensure_simm13_or_reg(s2, temp), d.as_register()); | |
2725 return d; | |
2726 } else { | |
2727 if (s2.is_register()) { | |
2728 assert_different_registers(s2.as_register(), temp); | |
2729 if (d.is_constant()) d = temp; | |
2730 set(s1.as_constant(), temp); | |
2731 sll_ptr(temp, s2.as_register(), d.as_register()); | |
2732 return d; | |
2733 } else { | |
2734 intptr_t res = s1.as_constant() << s2.as_constant(); | |
2735 return res; | |
2736 } | |
623
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2737 } |
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|
2738 } |
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|
2739 |
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2740 |
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2741 // Look up the method for a megamorphic invokeinterface call. |
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2742 // The target method is determined by <intf_klass, itable_index>. |
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2743 // The receiver klass is in recv_klass. |
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2744 // On success, the result will be in method_result, and execution falls through. |
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2745 // On failure, execution transfers to the given label. |
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2746 void MacroAssembler::lookup_interface_method(Register recv_klass, |
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2747 Register intf_klass, |
665
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2748 RegisterOrConstant itable_index, |
623
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2749 Register method_result, |
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2750 Register scan_temp, |
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2751 Register sethi_temp, |
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2752 Label& L_no_such_interface) { |
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2753 assert_different_registers(recv_klass, intf_klass, method_result, scan_temp); |
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2754 assert(itable_index.is_constant() || itable_index.as_register() == method_result, |
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2755 "caller must use same register for non-constant itable index as for method"); |
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|
2756 |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2757 // Compute start of first itableOffsetEntry (which is at the end of the vtable) |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2758 int vtable_base = instanceKlass::vtable_start_offset() * wordSize; |
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|
2759 int scan_step = itableOffsetEntry::size() * wordSize; |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2760 int vte_size = vtableEntry::size() * wordSize; |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2761 |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2762 lduw(recv_klass, instanceKlass::vtable_length_offset() * wordSize, scan_temp); |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2763 // %%% We should store the aligned, prescaled offset in the klassoop. |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2764 // Then the next several instructions would fold away. |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2765 |
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|
2766 int round_to_unit = ((HeapWordsPerLong > 1) ? BytesPerLong : 0); |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2767 int itb_offset = vtable_base; |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2768 if (round_to_unit != 0) { |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2769 // hoist first instruction of round_to(scan_temp, BytesPerLong): |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2770 itb_offset += round_to_unit - wordSize; |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2771 } |
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|
2772 int itb_scale = exact_log2(vtableEntry::size() * wordSize); |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2773 sll(scan_temp, itb_scale, scan_temp); |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2774 add(scan_temp, itb_offset, scan_temp); |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2775 if (round_to_unit != 0) { |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2776 // Round up to align_object_offset boundary |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2777 // see code for instanceKlass::start_of_itable! |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2778 // Was: round_to(scan_temp, BytesPerLong); |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2779 // Hoisted: add(scan_temp, BytesPerLong-1, scan_temp); |
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|
2780 and3(scan_temp, -round_to_unit, scan_temp); |
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|
2781 } |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2782 add(recv_klass, scan_temp, scan_temp); |
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|
2783 |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2784 // Adjust recv_klass by scaled itable_index, so we can free itable_index. |
665
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|
2785 RegisterOrConstant itable_offset = itable_index; |
1503 | 2786 itable_offset = regcon_sll_ptr(itable_index, exact_log2(itableMethodEntry::size() * wordSize), itable_offset); |
2787 itable_offset = regcon_inc_ptr(itable_offset, itableMethodEntry::method_offset_in_bytes(), itable_offset); | |
1006
dcf03e02b020
6879902: CTW failure jdk6_18/hotspot/src/cpu/sparc/vm/assembler_sparc.hpp:845
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parents:
986
diff
changeset
|
2788 add(recv_klass, ensure_simm13_or_reg(itable_offset, sethi_temp), recv_klass); |
623
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2789 |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2790 // for (scan = klass->itable(); scan->interface() != NULL; scan += scan_step) { |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2791 // if (scan->interface() == intf) { |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2792 // result = (klass + scan->offset() + itable_index); |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2793 // } |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2794 // } |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2795 Label search, found_method; |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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diff
changeset
|
2796 |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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changeset
|
2797 for (int peel = 1; peel >= 0; peel--) { |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2798 // %%%% Could load both offset and interface in one ldx, if they were |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2799 // in the opposite order. This would save a load. |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2800 ld_ptr(scan_temp, itableOffsetEntry::interface_offset_in_bytes(), method_result); |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2801 |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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diff
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|
2802 // Check that this entry is non-null. A null entry means that |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2803 // the receiver class doesn't implement the interface, and wasn't the |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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changeset
|
2804 // same as when the caller was compiled. |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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622
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changeset
|
2805 bpr(Assembler::rc_z, false, Assembler::pn, method_result, L_no_such_interface); |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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changeset
|
2806 delayed()->cmp(method_result, intf_klass); |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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622
diff
changeset
|
2807 |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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diff
changeset
|
2808 if (peel) { |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
jrose
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diff
changeset
|
2809 brx(Assembler::equal, false, Assembler::pt, found_method); |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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|
2810 } else { |
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622
diff
changeset
|
2811 brx(Assembler::notEqual, false, Assembler::pn, search); |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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changeset
|
2812 // (invert the test to fall through to found_method...) |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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diff
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|
2813 } |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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diff
changeset
|
2814 delayed()->add(scan_temp, scan_step, scan_temp); |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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622
diff
changeset
|
2815 |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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622
diff
changeset
|
2816 if (!peel) break; |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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622
diff
changeset
|
2817 |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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622
diff
changeset
|
2818 bind(search); |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
jrose
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diff
changeset
|
2819 } |
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6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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622
diff
changeset
|
2820 |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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622
diff
changeset
|
2821 bind(found_method); |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
jrose
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622
diff
changeset
|
2822 |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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622
diff
changeset
|
2823 // Got a hit. |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
jrose
parents:
622
diff
changeset
|
2824 int ito_offset = itableOffsetEntry::offset_offset_in_bytes(); |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
jrose
parents:
622
diff
changeset
|
2825 // scan_temp[-scan_step] points to the vtable offset we need |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
jrose
parents:
622
diff
changeset
|
2826 ito_offset -= scan_step; |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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parents:
622
diff
changeset
|
2827 lduw(scan_temp, ito_offset, scan_temp); |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
jrose
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622
diff
changeset
|
2828 ld_ptr(recv_klass, scan_temp, method_result); |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
jrose
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diff
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|
2829 } |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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622
diff
changeset
|
2830 |
9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
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622
diff
changeset
|
2831 |
644
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
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642
diff
changeset
|
2832 void MacroAssembler::check_klass_subtype(Register sub_klass, |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2833 Register super_klass, |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2834 Register temp_reg, |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2835 Register temp2_reg, |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2836 Label& L_success) { |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2837 Label L_failure, L_pop_to_failure; |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2838 check_klass_subtype_fast_path(sub_klass, super_klass, |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2839 temp_reg, temp2_reg, |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2840 &L_success, &L_failure, NULL); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2841 Register sub_2 = sub_klass; |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2842 Register sup_2 = super_klass; |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2843 if (!sub_2->is_global()) sub_2 = L0; |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
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642
diff
changeset
|
2844 if (!sup_2->is_global()) sup_2 = L1; |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
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|
2845 |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2846 save_frame_and_mov(0, sub_klass, sub_2, super_klass, sup_2); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2847 check_klass_subtype_slow_path(sub_2, sup_2, |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2848 L2, L3, L4, L5, |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2849 NULL, &L_pop_to_failure); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2850 |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2851 // on success: |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2852 restore(); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2853 ba(false, L_success); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2854 delayed()->nop(); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2855 |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2856 // on failure: |
c517646eef23
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jrose
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642
diff
changeset
|
2857 bind(L_pop_to_failure); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2858 restore(); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2859 bind(L_failure); |
c517646eef23
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642
diff
changeset
|
2860 } |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
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642
diff
changeset
|
2861 |
c517646eef23
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642
diff
changeset
|
2862 |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
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|
2863 void MacroAssembler::check_klass_subtype_fast_path(Register sub_klass, |
c517646eef23
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jrose
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642
diff
changeset
|
2864 Register super_klass, |
c517646eef23
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jrose
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642
diff
changeset
|
2865 Register temp_reg, |
c517646eef23
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642
diff
changeset
|
2866 Register temp2_reg, |
c517646eef23
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parents:
642
diff
changeset
|
2867 Label* L_success, |
c517646eef23
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parents:
642
diff
changeset
|
2868 Label* L_failure, |
c517646eef23
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jrose
parents:
642
diff
changeset
|
2869 Label* L_slow_path, |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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644
diff
changeset
|
2870 RegisterOrConstant super_check_offset, |
644
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2871 Register instanceof_hack) { |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2872 int sc_offset = (klassOopDesc::header_size() * HeapWordSize + |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2873 Klass::secondary_super_cache_offset_in_bytes()); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2874 int sco_offset = (klassOopDesc::header_size() * HeapWordSize + |
c517646eef23
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jrose
parents:
642
diff
changeset
|
2875 Klass::super_check_offset_offset_in_bytes()); |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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642
diff
changeset
|
2876 |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
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|
2877 bool must_load_sco = (super_check_offset.constant_or_zero() == -1); |
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diff
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|
2878 bool need_slow_path = (must_load_sco || |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
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|
2879 super_check_offset.constant_or_zero() == sco_offset); |
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diff
changeset
|
2880 |
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diff
changeset
|
2881 assert_different_registers(sub_klass, super_klass, temp_reg); |
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diff
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|
2882 if (super_check_offset.is_register()) { |
1503 | 2883 assert_different_registers(sub_klass, super_klass, temp_reg, |
644
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
changeset
|
2884 super_check_offset.as_register()); |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
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|
2885 } else if (must_load_sco) { |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
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|
2886 assert(temp2_reg != noreg, "supply either a temp or a register offset"); |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
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|
2887 } |
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diff
changeset
|
2888 |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
changeset
|
2889 Label L_fallthrough; |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2890 int label_nulls = 0; |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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642
diff
changeset
|
2891 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; } |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
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|
2892 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; } |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
changeset
|
2893 if (L_slow_path == NULL) { L_slow_path = &L_fallthrough; label_nulls++; } |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
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|
2894 assert(label_nulls <= 1 || instanceof_hack != noreg || |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
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|
2895 (L_slow_path == &L_fallthrough && label_nulls <= 2 && !need_slow_path), |
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diff
changeset
|
2896 "at most one NULL in the batch, usually"); |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
changeset
|
2897 |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
changeset
|
2898 // Support for the instanceof hack, which uses delay slots to |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
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|
2899 // set a destination register to zero or one. |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
changeset
|
2900 bool do_bool_sets = (instanceof_hack != noreg); |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
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|
2901 #define BOOL_SET(bool_value) \ |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
changeset
|
2902 if (do_bool_sets && bool_value >= 0) \ |
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diff
changeset
|
2903 set(bool_value, instanceof_hack) |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
changeset
|
2904 #define DELAYED_BOOL_SET(bool_value) \ |
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diff
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|
2905 if (do_bool_sets && bool_value >= 0) \ |
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diff
changeset
|
2906 delayed()->set(bool_value, instanceof_hack); \ |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
changeset
|
2907 else delayed()->nop() |
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diff
changeset
|
2908 // Hacked ba(), which may only be used just before L_fallthrough. |
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diff
changeset
|
2909 #define FINAL_JUMP(label, bool_value) \ |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
changeset
|
2910 if (&(label) == &L_fallthrough) { \ |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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642
diff
changeset
|
2911 BOOL_SET(bool_value); \ |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2912 } else { \ |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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642
diff
changeset
|
2913 ba((do_bool_sets && bool_value >= 0), label); \ |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
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diff
changeset
|
2914 DELAYED_BOOL_SET(bool_value); \ |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
changeset
|
2915 } |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
changeset
|
2916 |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
changeset
|
2917 // If the pointers are equal, we are done (e.g., String[] elements). |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2918 // This self-check enables sharing of secondary supertype arrays among |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2919 // non-primary types such as array-of-interface. Otherwise, each such |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2920 // type would need its own customized SSA. |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2921 // We move this check to the front of the fast path because many |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2922 // type checks are in fact trivially successful in this manner, |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2923 // so we get a nicely predicted branch right at the start of the check. |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2924 cmp(super_klass, sub_klass); |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2925 brx(Assembler::equal, do_bool_sets, Assembler::pn, *L_success); |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2926 DELAYED_BOOL_SET(1); |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2927 |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2928 // Check the supertype display: |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2929 if (must_load_sco) { |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2930 // The super check offset is always positive... |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2931 lduw(super_klass, sco_offset, temp2_reg); |
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
644
diff
changeset
|
2932 super_check_offset = RegisterOrConstant(temp2_reg); |
1503 | 2933 // super_check_offset is register. |
2934 assert_different_registers(sub_klass, super_klass, temp_reg, super_check_offset.as_register()); | |
644
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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diff
changeset
|
2935 } |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2936 ld_ptr(sub_klass, super_check_offset, temp_reg); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2937 cmp(super_klass, temp_reg); |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2938 |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2939 // This check has worked decisively for primary supers. |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2940 // Secondary supers are sought in the super_cache ('super_cache_addr'). |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2941 // (Secondary supers are interfaces and very deeply nested subtypes.) |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2942 // This works in the same check above because of a tricky aliasing |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2943 // between the super_cache and the primary super display elements. |
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6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2944 // (The 'super_check_addr' can address either, as the case requires.) |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2945 // Note that the cache is updated below if it does not help us find |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2946 // what we need immediately. |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2947 // So if it was a primary super, we can just fail immediately. |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2948 // Otherwise, it's the slow path for us (no success at this point). |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2949 |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2950 if (super_check_offset.is_register()) { |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2951 brx(Assembler::equal, do_bool_sets, Assembler::pn, *L_success); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2952 delayed(); if (do_bool_sets) BOOL_SET(1); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2953 // if !do_bool_sets, sneak the next cmp into the delay slot: |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2954 cmp(super_check_offset.as_register(), sc_offset); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2955 |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2956 if (L_failure == &L_fallthrough) { |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2957 brx(Assembler::equal, do_bool_sets, Assembler::pt, *L_slow_path); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2958 delayed()->nop(); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2959 BOOL_SET(0); // fallthrough on failure |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2960 } else { |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2961 brx(Assembler::notEqual, do_bool_sets, Assembler::pn, *L_failure); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2962 DELAYED_BOOL_SET(0); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2963 FINAL_JUMP(*L_slow_path, -1); // -1 => vanilla delay slot |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2964 } |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2965 } else if (super_check_offset.as_constant() == sc_offset) { |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2966 // Need a slow path; fast failure is impossible. |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
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parents:
642
diff
changeset
|
2967 if (L_slow_path == &L_fallthrough) { |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2968 brx(Assembler::equal, do_bool_sets, Assembler::pt, *L_success); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2969 DELAYED_BOOL_SET(1); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2970 } else { |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2971 brx(Assembler::notEqual, false, Assembler::pn, *L_slow_path); |
c517646eef23
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jrose
parents:
642
diff
changeset
|
2972 delayed()->nop(); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2973 FINAL_JUMP(*L_success, 1); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2974 } |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
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642
diff
changeset
|
2975 } else { |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2976 // No slow path; it's a fast decision. |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2977 if (L_failure == &L_fallthrough) { |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2978 brx(Assembler::equal, do_bool_sets, Assembler::pt, *L_success); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2979 DELAYED_BOOL_SET(1); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2980 BOOL_SET(0); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2981 } else { |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2982 brx(Assembler::notEqual, do_bool_sets, Assembler::pn, *L_failure); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2983 DELAYED_BOOL_SET(0); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2984 FINAL_JUMP(*L_success, 1); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2985 } |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2986 } |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2987 |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2988 bind(L_fallthrough); |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2989 |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2990 #undef final_jump |
c517646eef23
6813212: factor duplicated assembly code for general subclass check (for 6655638)
jrose
parents:
642
diff
changeset
|
2991 #undef bool_set |
c517646eef23
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jrose
parents:
642
diff
changeset
|
2992 #undef DELAYED_BOOL_SET |
c517646eef23
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jrose
parents:
642
diff
changeset
|
2993 #undef final_jump |
c517646eef23
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jrose
parents:
642
diff
changeset
|
2994 } |
c517646eef23
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jrose
parents:
642
diff
changeset
|
2995 |
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jrose
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642
diff
changeset
|
2996 |
c517646eef23
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jrose
parents:
642
diff
changeset
|
2997 void MacroAssembler::check_klass_subtype_slow_path(Register sub_klass, |
c517646eef23
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jrose
parents:
642
diff
changeset
|
2998 Register super_klass, |
c517646eef23
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jrose
parents:
642
diff
changeset
|
2999 Register count_temp, |
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3000 Register scan_temp, |
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3001 Register scratch_reg, |
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|
3002 Register coop_reg, |
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3003 Label* L_success, |
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3004 Label* L_failure) { |
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3005 assert_different_registers(sub_klass, super_klass, |
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3006 count_temp, scan_temp, scratch_reg, coop_reg); |
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3007 |
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3008 Label L_fallthrough, L_loop; |
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3009 int label_nulls = 0; |
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3010 if (L_success == NULL) { L_success = &L_fallthrough; label_nulls++; } |
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3011 if (L_failure == NULL) { L_failure = &L_fallthrough; label_nulls++; } |
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3012 assert(label_nulls <= 1, "at most one NULL in the batch"); |
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3013 |
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3014 // a couple of useful fields in sub_klass: |
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3015 int ss_offset = (klassOopDesc::header_size() * HeapWordSize + |
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3016 Klass::secondary_supers_offset_in_bytes()); |
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3017 int sc_offset = (klassOopDesc::header_size() * HeapWordSize + |
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3018 Klass::secondary_super_cache_offset_in_bytes()); |
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3019 |
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3020 // Do a linear scan of the secondary super-klass chain. |
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3021 // This code is rarely used, so simplicity is a virtue here. |
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3022 |
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3023 #ifndef PRODUCT |
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3024 int* pst_counter = &SharedRuntime::_partial_subtype_ctr; |
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3025 inc_counter((address) pst_counter, count_temp, scan_temp); |
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3026 #endif |
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3027 |
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3028 // We will consult the secondary-super array. |
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3029 ld_ptr(sub_klass, ss_offset, scan_temp); |
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3030 |
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3031 // Compress superclass if necessary. |
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3032 Register search_key = super_klass; |
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3033 bool decode_super_klass = false; |
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3034 if (UseCompressedOops) { |
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3035 if (coop_reg != noreg) { |
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3036 encode_heap_oop_not_null(super_klass, coop_reg); |
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3037 search_key = coop_reg; |
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|
3038 } else { |
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3039 encode_heap_oop_not_null(super_klass); |
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3040 decode_super_klass = true; // scarce temps! |
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3041 } |
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3042 // The superclass is never null; it would be a basic system error if a null |
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3043 // pointer were to sneak in here. Note that we have already loaded the |
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3044 // Klass::super_check_offset from the super_klass in the fast path, |
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3045 // so if there is a null in that register, we are already in the afterlife. |
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3046 } |
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3047 |
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3048 // Load the array length. (Positive movl does right thing on LP64.) |
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3049 lduw(scan_temp, arrayOopDesc::length_offset_in_bytes(), count_temp); |
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3050 |
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3051 // Check for empty secondary super list |
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3052 tst(count_temp); |
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|
3053 |
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3054 // Top of search loop |
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|
3055 bind(L_loop); |
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3056 br(Assembler::equal, false, Assembler::pn, *L_failure); |
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3057 delayed()->add(scan_temp, heapOopSize, scan_temp); |
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3058 assert(heapOopSize != 0, "heapOopSize should be initialized"); |
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|
3059 |
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3060 // Skip the array header in all array accesses. |
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3061 int elem_offset = arrayOopDesc::base_offset_in_bytes(T_OBJECT); |
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3062 elem_offset -= heapOopSize; // the scan pointer was pre-incremented also |
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3063 |
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|
3064 // Load next super to check |
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|
3065 if (UseCompressedOops) { |
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|
3066 // Don't use load_heap_oop; we don't want to decode the element. |
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3067 lduw( scan_temp, elem_offset, scratch_reg ); |
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3068 } else { |
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3069 ld_ptr( scan_temp, elem_offset, scratch_reg ); |
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|
3070 } |
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|
3071 |
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3072 // Look for Rsuper_klass on Rsub_klass's secondary super-class-overflow list |
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3073 cmp(scratch_reg, search_key); |
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|
3074 |
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|
3075 // A miss means we are NOT a subtype and need to keep looping |
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|
3076 brx(Assembler::notEqual, false, Assembler::pn, L_loop); |
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|
3077 delayed()->deccc(count_temp); // decrement trip counter in delay slot |
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|
3078 |
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|
3079 // Falling out the bottom means we found a hit; we ARE a subtype |
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|
3080 if (decode_super_klass) decode_heap_oop(super_klass); |
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|
3081 |
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|
3082 // Success. Cache the super we found and proceed in triumph. |
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|
3083 st_ptr(super_klass, sub_klass, sc_offset); |
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|
3084 |
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|
3085 if (L_success != &L_fallthrough) { |
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|
3086 ba(false, *L_success); |
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|
3087 delayed()->nop(); |
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|
3088 } |
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|
3089 |
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|
3090 bind(L_fallthrough); |
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|
3091 } |
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|
3092 |
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|
3093 |
710 | 3094 void MacroAssembler::check_method_handle_type(Register mtype_reg, Register mh_reg, |
3095 Register temp_reg, | |
3096 Label& wrong_method_type) { | |
1503 | 3097 if (UseCompressedOops) unimplemented("coop"); // field accesses must decode |
710 | 3098 assert_different_registers(mtype_reg, mh_reg, temp_reg); |
3099 // compare method type against that of the receiver | |
3100 RegisterOrConstant mhtype_offset = delayed_value(java_dyn_MethodHandle::type_offset_in_bytes, temp_reg); | |
3101 ld_ptr(mh_reg, mhtype_offset, temp_reg); | |
3102 cmp(temp_reg, mtype_reg); | |
3103 br(Assembler::notEqual, false, Assembler::pn, wrong_method_type); | |
3104 delayed()->nop(); | |
3105 } | |
3106 | |
3107 | |
1503 | 3108 // A method handle has a "vmslots" field which gives the size of its |
3109 // argument list in JVM stack slots. This field is either located directly | |
3110 // in every method handle, or else is indirectly accessed through the | |
3111 // method handle's MethodType. This macro hides the distinction. | |
3112 void MacroAssembler::load_method_handle_vmslots(Register vmslots_reg, Register mh_reg, | |
3113 Register temp_reg) { | |
3114 assert_different_registers(vmslots_reg, mh_reg, temp_reg); | |
3115 if (UseCompressedOops) unimplemented("coop"); // field accesses must decode | |
3116 // load mh.type.form.vmslots | |
3117 if (java_dyn_MethodHandle::vmslots_offset_in_bytes() != 0) { | |
3118 // hoist vmslots into every mh to avoid dependent load chain | |
3119 ld( Address(mh_reg, delayed_value(java_dyn_MethodHandle::vmslots_offset_in_bytes, temp_reg)), vmslots_reg); | |
3120 } else { | |
3121 Register temp2_reg = vmslots_reg; | |
3122 ld_ptr(Address(mh_reg, delayed_value(java_dyn_MethodHandle::type_offset_in_bytes, temp_reg)), temp2_reg); | |
3123 ld_ptr(Address(temp2_reg, delayed_value(java_dyn_MethodType::form_offset_in_bytes, temp_reg)), temp2_reg); | |
3124 ld( Address(temp2_reg, delayed_value(java_dyn_MethodTypeForm::vmslots_offset_in_bytes, temp_reg)), vmslots_reg); | |
3125 } | |
3126 } | |
3127 | |
3128 | |
3129 void MacroAssembler::jump_to_method_handle_entry(Register mh_reg, Register temp_reg, bool emit_delayed_nop) { | |
710 | 3130 assert(mh_reg == G3_method_handle, "caller must put MH object in G3"); |
3131 assert_different_registers(mh_reg, temp_reg); | |
3132 | |
1503 | 3133 if (UseCompressedOops) unimplemented("coop"); // field accesses must decode |
3134 | |
710 | 3135 // pick out the interpreted side of the handler |
3136 ld_ptr(mh_reg, delayed_value(java_dyn_MethodHandle::vmentry_offset_in_bytes, temp_reg), temp_reg); | |
3137 | |
3138 // off we go... | |
3139 ld_ptr(temp_reg, MethodHandleEntry::from_interpreted_entry_offset_in_bytes(), temp_reg); | |
3140 jmp(temp_reg, 0); | |
3141 | |
3142 // for the various stubs which take control at this point, | |
3143 // see MethodHandles::generate_method_handle_stub | |
3144 | |
1503 | 3145 // Some callers can fill the delay slot. |
3146 if (emit_delayed_nop) { | |
3147 delayed()->nop(); | |
3148 } | |
710 | 3149 } |
3150 | |
1503 | 3151 |
710 | 3152 RegisterOrConstant MacroAssembler::argument_offset(RegisterOrConstant arg_slot, |
3153 int extra_slot_offset) { | |
3154 // cf. TemplateTable::prepare_invoke(), if (load_receiver). | |
1506 | 3155 int stackElementSize = Interpreter::stackElementSize; |
1503 | 3156 int offset = extra_slot_offset * stackElementSize; |
710 | 3157 if (arg_slot.is_constant()) { |
3158 offset += arg_slot.as_constant() * stackElementSize; | |
3159 return offset; | |
3160 } else { | |
3161 Register temp = arg_slot.as_register(); | |
3162 sll_ptr(temp, exact_log2(stackElementSize), temp); | |
3163 if (offset != 0) | |
3164 add(temp, offset, temp); | |
3165 return temp; | |
3166 } | |
3167 } | |
3168 | |
3169 | |
1503 | 3170 Address MacroAssembler::argument_address(RegisterOrConstant arg_slot, |
3171 int extra_slot_offset) { | |
3172 return Address(Gargs, argument_offset(arg_slot, extra_slot_offset)); | |
3173 } | |
3174 | |
710 | 3175 |
420
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3176 void MacroAssembler::biased_locking_enter(Register obj_reg, Register mark_reg, |
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3177 Register temp_reg, |
0 | 3178 Label& done, Label* slow_case, |
3179 BiasedLockingCounters* counters) { | |
3180 assert(UseBiasedLocking, "why call this otherwise?"); | |
3181 | |
3182 if (PrintBiasedLockingStatistics) { | |
3183 assert_different_registers(obj_reg, mark_reg, temp_reg, O7); | |
3184 if (counters == NULL) | |
3185 counters = BiasedLocking::counters(); | |
3186 } | |
3187 | |
3188 Label cas_label; | |
3189 | |
3190 // Biased locking | |
3191 // See whether the lock is currently biased toward our thread and | |
3192 // whether the epoch is still valid | |
3193 // Note that the runtime guarantees sufficient alignment of JavaThread | |
3194 // pointers to allow age to be placed into low bits | |
3195 assert(markOopDesc::age_shift == markOopDesc::lock_bits + markOopDesc::biased_lock_bits, "biased locking makes assumptions about bit layout"); | |
3196 and3(mark_reg, markOopDesc::biased_lock_mask_in_place, temp_reg); | |
3197 cmp(temp_reg, markOopDesc::biased_lock_pattern); | |
3198 brx(Assembler::notEqual, false, Assembler::pn, cas_label); | |
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3199 delayed()->nop(); |
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3200 |
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3201 load_klass(obj_reg, temp_reg); |
727 | 3202 ld_ptr(Address(temp_reg, Klass::prototype_header_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes()), temp_reg); |
0 | 3203 or3(G2_thread, temp_reg, temp_reg); |
3204 xor3(mark_reg, temp_reg, temp_reg); | |
3205 andcc(temp_reg, ~((int) markOopDesc::age_mask_in_place), temp_reg); | |
3206 if (counters != NULL) { | |
3207 cond_inc(Assembler::equal, (address) counters->biased_lock_entry_count_addr(), mark_reg, temp_reg); | |
3208 // Reload mark_reg as we may need it later | |
727 | 3209 ld_ptr(Address(obj_reg, oopDesc::mark_offset_in_bytes()), mark_reg); |
0 | 3210 } |
3211 brx(Assembler::equal, true, Assembler::pt, done); | |
3212 delayed()->nop(); | |
3213 | |
3214 Label try_revoke_bias; | |
3215 Label try_rebias; | |
727 | 3216 Address mark_addr = Address(obj_reg, oopDesc::mark_offset_in_bytes()); |
0 | 3217 assert(mark_addr.disp() == 0, "cas must take a zero displacement"); |
3218 | |
3219 // At this point we know that the header has the bias pattern and | |
3220 // that we are not the bias owner in the current epoch. We need to | |
3221 // figure out more details about the state of the header in order to | |
3222 // know what operations can be legally performed on the object's | |
3223 // header. | |
3224 | |
3225 // If the low three bits in the xor result aren't clear, that means | |
3226 // the prototype header is no longer biased and we have to revoke | |
3227 // the bias on this object. | |
3228 btst(markOopDesc::biased_lock_mask_in_place, temp_reg); | |
3229 brx(Assembler::notZero, false, Assembler::pn, try_revoke_bias); | |
3230 | |
3231 // Biasing is still enabled for this data type. See whether the | |
3232 // epoch of the current bias is still valid, meaning that the epoch | |
3233 // bits of the mark word are equal to the epoch bits of the | |
3234 // prototype header. (Note that the prototype header's epoch bits | |
3235 // only change at a safepoint.) If not, attempt to rebias the object | |
3236 // toward the current thread. Note that we must be absolutely sure | |
3237 // that the current epoch is invalid in order to do this because | |
3238 // otherwise the manipulations it performs on the mark word are | |
3239 // illegal. | |
3240 delayed()->btst(markOopDesc::epoch_mask_in_place, temp_reg); | |
3241 brx(Assembler::notZero, false, Assembler::pn, try_rebias); | |
3242 | |
3243 // The epoch of the current bias is still valid but we know nothing | |
3244 // about the owner; it might be set or it might be clear. Try to | |
3245 // acquire the bias of the object using an atomic operation. If this | |
3246 // fails we will go in to the runtime to revoke the object's bias. | |
3247 // Note that we first construct the presumed unbiased header so we | |
3248 // don't accidentally blow away another thread's valid bias. | |
3249 delayed()->and3(mark_reg, | |
3250 markOopDesc::biased_lock_mask_in_place | markOopDesc::age_mask_in_place | markOopDesc::epoch_mask_in_place, | |
3251 mark_reg); | |
3252 or3(G2_thread, mark_reg, temp_reg); | |
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3253 casn(mark_addr.base(), mark_reg, temp_reg); |
0 | 3254 // If the biasing toward our thread failed, this means that |
3255 // another thread succeeded in biasing it toward itself and we | |
3256 // need to revoke that bias. The revocation will occur in the | |
3257 // interpreter runtime in the slow case. | |
3258 cmp(mark_reg, temp_reg); | |
3259 if (counters != NULL) { | |
3260 cond_inc(Assembler::zero, (address) counters->anonymously_biased_lock_entry_count_addr(), mark_reg, temp_reg); | |
3261 } | |
3262 if (slow_case != NULL) { | |
3263 brx(Assembler::notEqual, true, Assembler::pn, *slow_case); | |
3264 delayed()->nop(); | |
3265 } | |
3266 br(Assembler::always, false, Assembler::pt, done); | |
3267 delayed()->nop(); | |
3268 | |
3269 bind(try_rebias); | |
3270 // At this point we know the epoch has expired, meaning that the | |
3271 // current "bias owner", if any, is actually invalid. Under these | |
3272 // circumstances _only_, we are allowed to use the current header's | |
3273 // value as the comparison value when doing the cas to acquire the | |
3274 // bias in the current epoch. In other words, we allow transfer of | |
3275 // the bias from one thread to another directly in this situation. | |
3276 // | |
3277 // FIXME: due to a lack of registers we currently blow away the age | |
3278 // bits in this situation. Should attempt to preserve them. | |
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3279 load_klass(obj_reg, temp_reg); |
727 | 3280 ld_ptr(Address(temp_reg, Klass::prototype_header_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes()), temp_reg); |
0 | 3281 or3(G2_thread, temp_reg, temp_reg); |
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3282 casn(mark_addr.base(), mark_reg, temp_reg); |
0 | 3283 // If the biasing toward our thread failed, this means that |
3284 // another thread succeeded in biasing it toward itself and we | |
3285 // need to revoke that bias. The revocation will occur in the | |
3286 // interpreter runtime in the slow case. | |
3287 cmp(mark_reg, temp_reg); | |
3288 if (counters != NULL) { | |
3289 cond_inc(Assembler::zero, (address) counters->rebiased_lock_entry_count_addr(), mark_reg, temp_reg); | |
3290 } | |
3291 if (slow_case != NULL) { | |
3292 brx(Assembler::notEqual, true, Assembler::pn, *slow_case); | |
3293 delayed()->nop(); | |
3294 } | |
3295 br(Assembler::always, false, Assembler::pt, done); | |
3296 delayed()->nop(); | |
3297 | |
3298 bind(try_revoke_bias); | |
3299 // The prototype mark in the klass doesn't have the bias bit set any | |
3300 // more, indicating that objects of this data type are not supposed | |
3301 // to be biased any more. We are going to try to reset the mark of | |
3302 // this object to the prototype value and fall through to the | |
3303 // CAS-based locking scheme. Note that if our CAS fails, it means | |
3304 // that another thread raced us for the privilege of revoking the | |
3305 // bias of this particular object, so it's okay to continue in the | |
3306 // normal locking code. | |
3307 // | |
3308 // FIXME: due to a lack of registers we currently blow away the age | |
3309 // bits in this situation. Should attempt to preserve them. | |
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3310 load_klass(obj_reg, temp_reg); |
727 | 3311 ld_ptr(Address(temp_reg, Klass::prototype_header_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes()), temp_reg); |
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3312 casn(mark_addr.base(), mark_reg, temp_reg); |
0 | 3313 // Fall through to the normal CAS-based lock, because no matter what |
3314 // the result of the above CAS, some thread must have succeeded in | |
3315 // removing the bias bit from the object's header. | |
3316 if (counters != NULL) { | |
3317 cmp(mark_reg, temp_reg); | |
3318 cond_inc(Assembler::zero, (address) counters->revoked_lock_entry_count_addr(), mark_reg, temp_reg); | |
3319 } | |
3320 | |
3321 bind(cas_label); | |
3322 } | |
3323 | |
3324 void MacroAssembler::biased_locking_exit (Address mark_addr, Register temp_reg, Label& done, | |
3325 bool allow_delay_slot_filling) { | |
3326 // Check for biased locking unlock case, which is a no-op | |
3327 // Note: we do not have to check the thread ID for two reasons. | |
3328 // First, the interpreter checks for IllegalMonitorStateException at | |
3329 // a higher level. Second, if the bias was revoked while we held the | |
3330 // lock, the object could not be rebiased toward another thread, so | |
3331 // the bias bit would be clear. | |
3332 ld_ptr(mark_addr, temp_reg); | |
3333 and3(temp_reg, markOopDesc::biased_lock_mask_in_place, temp_reg); | |
3334 cmp(temp_reg, markOopDesc::biased_lock_pattern); | |
3335 brx(Assembler::equal, allow_delay_slot_filling, Assembler::pt, done); | |
3336 delayed(); | |
3337 if (!allow_delay_slot_filling) { | |
3338 nop(); | |
3339 } | |
3340 } | |
3341 | |
3342 | |
3343 // CASN -- 32-64 bit switch hitter similar to the synthetic CASN provided by | |
3344 // Solaris/SPARC's "as". Another apt name would be cas_ptr() | |
3345 | |
3346 void MacroAssembler::casn (Register addr_reg, Register cmp_reg, Register set_reg ) { | |
3347 casx_under_lock (addr_reg, cmp_reg, set_reg, (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr()) ; | |
3348 } | |
3349 | |
3350 | |
3351 | |
3352 // compiler_lock_object() and compiler_unlock_object() are direct transliterations | |
3353 // of i486.ad fast_lock() and fast_unlock(). See those methods for detailed comments. | |
3354 // The code could be tightened up considerably. | |
3355 // | |
3356 // box->dhw disposition - post-conditions at DONE_LABEL. | |
3357 // - Successful inflated lock: box->dhw != 0. | |
3358 // Any non-zero value suffices. | |
3359 // Consider G2_thread, rsp, boxReg, or unused_mark() | |
3360 // - Successful Stack-lock: box->dhw == mark. | |
3361 // box->dhw must contain the displaced mark word value | |
3362 // - Failure -- icc.ZFlag == 0 and box->dhw is undefined. | |
3363 // The slow-path fast_enter() and slow_enter() operators | |
3364 // are responsible for setting box->dhw = NonZero (typically ::unused_mark). | |
3365 // - Biased: box->dhw is undefined | |
3366 // | |
3367 // SPARC refworkload performance - specifically jetstream and scimark - are | |
3368 // extremely sensitive to the size of the code emitted by compiler_lock_object | |
3369 // and compiler_unlock_object. Critically, the key factor is code size, not path | |
3370 // length. (Simply experiments to pad CLO with unexecuted NOPs demonstrte the | |
3371 // effect). | |
3372 | |
3373 | |
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3374 void MacroAssembler::compiler_lock_object(Register Roop, Register Rmark, |
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3375 Register Rbox, Register Rscratch, |
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3376 BiasedLockingCounters* counters, |
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3377 bool try_bias) { |
727 | 3378 Address mark_addr(Roop, oopDesc::mark_offset_in_bytes()); |
0 | 3379 |
3380 verify_oop(Roop); | |
3381 Label done ; | |
3382 | |
3383 if (counters != NULL) { | |
3384 inc_counter((address) counters->total_entry_count_addr(), Rmark, Rscratch); | |
3385 } | |
3386 | |
3387 if (EmitSync & 1) { | |
3388 mov (3, Rscratch) ; | |
3389 st_ptr (Rscratch, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3390 cmp (SP, G0) ; | |
3391 return ; | |
3392 } | |
3393 | |
3394 if (EmitSync & 2) { | |
3395 | |
3396 // Fetch object's markword | |
3397 ld_ptr(mark_addr, Rmark); | |
3398 | |
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3399 if (try_bias) { |
0 | 3400 biased_locking_enter(Roop, Rmark, Rscratch, done, NULL, counters); |
3401 } | |
3402 | |
3403 // Save Rbox in Rscratch to be used for the cas operation | |
3404 mov(Rbox, Rscratch); | |
3405 | |
3406 // set Rmark to markOop | markOopDesc::unlocked_value | |
3407 or3(Rmark, markOopDesc::unlocked_value, Rmark); | |
3408 | |
3409 // Initialize the box. (Must happen before we update the object mark!) | |
3410 st_ptr(Rmark, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3411 | |
3412 // compare object markOop with Rmark and if equal exchange Rscratch with object markOop | |
3413 assert(mark_addr.disp() == 0, "cas must take a zero displacement"); | |
3414 casx_under_lock(mark_addr.base(), Rmark, Rscratch, | |
3415 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr()); | |
3416 | |
3417 // if compare/exchange succeeded we found an unlocked object and we now have locked it | |
3418 // hence we are done | |
3419 cmp(Rmark, Rscratch); | |
3420 #ifdef _LP64 | |
3421 sub(Rscratch, STACK_BIAS, Rscratch); | |
3422 #endif | |
3423 brx(Assembler::equal, false, Assembler::pt, done); | |
3424 delayed()->sub(Rscratch, SP, Rscratch); //pull next instruction into delay slot | |
3425 | |
3426 // we did not find an unlocked object so see if this is a recursive case | |
3427 // sub(Rscratch, SP, Rscratch); | |
3428 assert(os::vm_page_size() > 0xfff, "page size too small - change the constant"); | |
3429 andcc(Rscratch, 0xfffff003, Rscratch); | |
3430 st_ptr(Rscratch, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3431 bind (done) ; | |
3432 return ; | |
3433 } | |
3434 | |
3435 Label Egress ; | |
3436 | |
3437 if (EmitSync & 256) { | |
3438 Label IsInflated ; | |
3439 | |
3440 ld_ptr (mark_addr, Rmark); // fetch obj->mark | |
3441 // Triage: biased, stack-locked, neutral, inflated | |
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3442 if (try_bias) { |
0 | 3443 biased_locking_enter(Roop, Rmark, Rscratch, done, NULL, counters); |
3444 // Invariant: if control reaches this point in the emitted stream | |
3445 // then Rmark has not been modified. | |
3446 } | |
3447 | |
3448 // Store mark into displaced mark field in the on-stack basic-lock "box" | |
3449 // Critically, this must happen before the CAS | |
3450 // Maximize the ST-CAS distance to minimize the ST-before-CAS penalty. | |
3451 st_ptr (Rmark, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3452 andcc (Rmark, 2, G0) ; | |
3453 brx (Assembler::notZero, false, Assembler::pn, IsInflated) ; | |
3454 delayed() -> | |
3455 | |
3456 // Try stack-lock acquisition. | |
3457 // Beware: the 1st instruction is in a delay slot | |
3458 mov (Rbox, Rscratch); | |
3459 or3 (Rmark, markOopDesc::unlocked_value, Rmark); | |
3460 assert (mark_addr.disp() == 0, "cas must take a zero displacement"); | |
3461 casn (mark_addr.base(), Rmark, Rscratch) ; | |
3462 cmp (Rmark, Rscratch); | |
3463 brx (Assembler::equal, false, Assembler::pt, done); | |
3464 delayed()->sub(Rscratch, SP, Rscratch); | |
3465 | |
3466 // Stack-lock attempt failed - check for recursive stack-lock. | |
3467 // See the comments below about how we might remove this case. | |
3468 #ifdef _LP64 | |
3469 sub (Rscratch, STACK_BIAS, Rscratch); | |
3470 #endif | |
3471 assert(os::vm_page_size() > 0xfff, "page size too small - change the constant"); | |
3472 andcc (Rscratch, 0xfffff003, Rscratch); | |
3473 br (Assembler::always, false, Assembler::pt, done) ; | |
3474 delayed()-> st_ptr (Rscratch, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3475 | |
3476 bind (IsInflated) ; | |
3477 if (EmitSync & 64) { | |
3478 // If m->owner != null goto IsLocked | |
3479 // Pessimistic form: Test-and-CAS vs CAS | |
3480 // The optimistic form avoids RTS->RTO cache line upgrades. | |
727 | 3481 ld_ptr (Rmark, ObjectMonitor::owner_offset_in_bytes() - 2, Rscratch); |
0 | 3482 andcc (Rscratch, Rscratch, G0) ; |
3483 brx (Assembler::notZero, false, Assembler::pn, done) ; | |
3484 delayed()->nop() ; | |
3485 // m->owner == null : it's unlocked. | |
3486 } | |
3487 | |
3488 // Try to CAS m->owner from null to Self | |
3489 // Invariant: if we acquire the lock then _recursions should be 0. | |
3490 add (Rmark, ObjectMonitor::owner_offset_in_bytes()-2, Rmark) ; | |
3491 mov (G2_thread, Rscratch) ; | |
3492 casn (Rmark, G0, Rscratch) ; | |
3493 cmp (Rscratch, G0) ; | |
3494 // Intentional fall-through into done | |
3495 } else { | |
3496 // Aggressively avoid the Store-before-CAS penalty | |
3497 // Defer the store into box->dhw until after the CAS | |
3498 Label IsInflated, Recursive ; | |
3499 | |
3500 // Anticipate CAS -- Avoid RTS->RTO upgrade | |
3501 // prefetch (mark_addr, Assembler::severalWritesAndPossiblyReads) ; | |
3502 | |
3503 ld_ptr (mark_addr, Rmark); // fetch obj->mark | |
3504 // Triage: biased, stack-locked, neutral, inflated | |
3505 | |
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3506 if (try_bias) { |
0 | 3507 biased_locking_enter(Roop, Rmark, Rscratch, done, NULL, counters); |
3508 // Invariant: if control reaches this point in the emitted stream | |
3509 // then Rmark has not been modified. | |
3510 } | |
3511 andcc (Rmark, 2, G0) ; | |
3512 brx (Assembler::notZero, false, Assembler::pn, IsInflated) ; | |
3513 delayed()-> // Beware - dangling delay-slot | |
3514 | |
3515 // Try stack-lock acquisition. | |
3516 // Transiently install BUSY (0) encoding in the mark word. | |
3517 // if the CAS of 0 into the mark was successful then we execute: | |
3518 // ST box->dhw = mark -- save fetched mark in on-stack basiclock box | |
3519 // ST obj->mark = box -- overwrite transient 0 value | |
3520 // This presumes TSO, of course. | |
3521 | |
3522 mov (0, Rscratch) ; | |
3523 or3 (Rmark, markOopDesc::unlocked_value, Rmark); | |
3524 assert (mark_addr.disp() == 0, "cas must take a zero displacement"); | |
3525 casn (mark_addr.base(), Rmark, Rscratch) ; | |
3526 // prefetch (mark_addr, Assembler::severalWritesAndPossiblyReads) ; | |
3527 cmp (Rscratch, Rmark) ; | |
3528 brx (Assembler::notZero, false, Assembler::pn, Recursive) ; | |
3529 delayed() -> | |
3530 st_ptr (Rmark, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3531 if (counters != NULL) { | |
3532 cond_inc(Assembler::equal, (address) counters->fast_path_entry_count_addr(), Rmark, Rscratch); | |
3533 } | |
3534 br (Assembler::always, false, Assembler::pt, done); | |
3535 delayed() -> | |
3536 st_ptr (Rbox, mark_addr) ; | |
3537 | |
3538 bind (Recursive) ; | |
3539 // Stack-lock attempt failed - check for recursive stack-lock. | |
3540 // Tests show that we can remove the recursive case with no impact | |
3541 // on refworkload 0.83. If we need to reduce the size of the code | |
3542 // emitted by compiler_lock_object() the recursive case is perfect | |
3543 // candidate. | |
3544 // | |
3545 // A more extreme idea is to always inflate on stack-lock recursion. | |
3546 // This lets us eliminate the recursive checks in compiler_lock_object | |
3547 // and compiler_unlock_object and the (box->dhw == 0) encoding. | |
3548 // A brief experiment - requiring changes to synchronizer.cpp, interpreter, | |
3549 // and showed a performance *increase*. In the same experiment I eliminated | |
3550 // the fast-path stack-lock code from the interpreter and always passed | |
3551 // control to the "slow" operators in synchronizer.cpp. | |
3552 | |
3553 // RScratch contains the fetched obj->mark value from the failed CASN. | |
3554 #ifdef _LP64 | |
3555 sub (Rscratch, STACK_BIAS, Rscratch); | |
3556 #endif | |
3557 sub(Rscratch, SP, Rscratch); | |
3558 assert(os::vm_page_size() > 0xfff, "page size too small - change the constant"); | |
3559 andcc (Rscratch, 0xfffff003, Rscratch); | |
3560 if (counters != NULL) { | |
3561 // Accounting needs the Rscratch register | |
3562 st_ptr (Rscratch, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3563 cond_inc(Assembler::equal, (address) counters->fast_path_entry_count_addr(), Rmark, Rscratch); | |
3564 br (Assembler::always, false, Assembler::pt, done) ; | |
3565 delayed()->nop() ; | |
3566 } else { | |
3567 br (Assembler::always, false, Assembler::pt, done) ; | |
3568 delayed()-> st_ptr (Rscratch, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3569 } | |
3570 | |
3571 bind (IsInflated) ; | |
3572 if (EmitSync & 64) { | |
3573 // If m->owner != null goto IsLocked | |
3574 // Test-and-CAS vs CAS | |
3575 // Pessimistic form avoids futile (doomed) CAS attempts | |
3576 // The optimistic form avoids RTS->RTO cache line upgrades. | |
727 | 3577 ld_ptr (Rmark, ObjectMonitor::owner_offset_in_bytes() - 2, Rscratch); |
0 | 3578 andcc (Rscratch, Rscratch, G0) ; |
3579 brx (Assembler::notZero, false, Assembler::pn, done) ; | |
3580 delayed()->nop() ; | |
3581 // m->owner == null : it's unlocked. | |
3582 } | |
3583 | |
3584 // Try to CAS m->owner from null to Self | |
3585 // Invariant: if we acquire the lock then _recursions should be 0. | |
3586 add (Rmark, ObjectMonitor::owner_offset_in_bytes()-2, Rmark) ; | |
3587 mov (G2_thread, Rscratch) ; | |
3588 casn (Rmark, G0, Rscratch) ; | |
3589 cmp (Rscratch, G0) ; | |
3590 // ST box->displaced_header = NonZero. | |
3591 // Any non-zero value suffices: | |
3592 // unused_mark(), G2_thread, RBox, RScratch, rsp, etc. | |
3593 st_ptr (Rbox, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
3594 // Intentional fall-through into done | |
3595 } | |
3596 | |
3597 bind (done) ; | |
3598 } | |
3599 | |
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3600 void MacroAssembler::compiler_unlock_object(Register Roop, Register Rmark, |
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3601 Register Rbox, Register Rscratch, |
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3602 bool try_bias) { |
727 | 3603 Address mark_addr(Roop, oopDesc::mark_offset_in_bytes()); |
0 | 3604 |
3605 Label done ; | |
3606 | |
3607 if (EmitSync & 4) { | |
3608 cmp (SP, G0) ; | |
3609 return ; | |
3610 } | |
3611 | |
3612 if (EmitSync & 8) { | |
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3613 if (try_bias) { |
0 | 3614 biased_locking_exit(mark_addr, Rscratch, done); |
3615 } | |
3616 | |
3617 // Test first if it is a fast recursive unlock | |
3618 ld_ptr(Rbox, BasicLock::displaced_header_offset_in_bytes(), Rmark); | |
3619 cmp(Rmark, G0); | |
3620 brx(Assembler::equal, false, Assembler::pt, done); | |
3621 delayed()->nop(); | |
3622 | |
3623 // Check if it is still a light weight lock, this is is true if we see | |
3624 // the stack address of the basicLock in the markOop of the object | |
3625 assert(mark_addr.disp() == 0, "cas must take a zero displacement"); | |
3626 casx_under_lock(mark_addr.base(), Rbox, Rmark, | |
3627 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr()); | |
3628 br (Assembler::always, false, Assembler::pt, done); | |
3629 delayed()->cmp(Rbox, Rmark); | |
3630 bind (done) ; | |
3631 return ; | |
3632 } | |
3633 | |
3634 // Beware ... If the aggregate size of the code emitted by CLO and CUO is | |
3635 // is too large performance rolls abruptly off a cliff. | |
3636 // This could be related to inlining policies, code cache management, or | |
3637 // I$ effects. | |
3638 Label LStacked ; | |
3639 | |
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3640 if (try_bias) { |
0 | 3641 // TODO: eliminate redundant LDs of obj->mark |
3642 biased_locking_exit(mark_addr, Rscratch, done); | |
3643 } | |
3644 | |
3645 ld_ptr (Roop, oopDesc::mark_offset_in_bytes(), Rmark) ; | |
3646 ld_ptr (Rbox, BasicLock::displaced_header_offset_in_bytes(), Rscratch); | |
3647 andcc (Rscratch, Rscratch, G0); | |
3648 brx (Assembler::zero, false, Assembler::pn, done); | |
3649 delayed()-> nop() ; // consider: relocate fetch of mark, above, into this DS | |
3650 andcc (Rmark, 2, G0) ; | |
3651 brx (Assembler::zero, false, Assembler::pt, LStacked) ; | |
3652 delayed()-> nop() ; | |
3653 | |
3654 // It's inflated | |
3655 // Conceptually we need a #loadstore|#storestore "release" MEMBAR before | |
3656 // the ST of 0 into _owner which releases the lock. This prevents loads | |
3657 // and stores within the critical section from reordering (floating) | |
3658 // past the store that releases the lock. But TSO is a strong memory model | |
3659 // and that particular flavor of barrier is a noop, so we can safely elide it. | |
3660 // Note that we use 1-0 locking by default for the inflated case. We | |
3661 // close the resultant (and rare) race by having contented threads in | |
3662 // monitorenter periodically poll _owner. | |
727 | 3663 ld_ptr (Rmark, ObjectMonitor::owner_offset_in_bytes() - 2, Rscratch); |
3664 ld_ptr (Rmark, ObjectMonitor::recursions_offset_in_bytes() - 2, Rbox); | |
0 | 3665 xor3 (Rscratch, G2_thread, Rscratch) ; |
3666 orcc (Rbox, Rscratch, Rbox) ; | |
3667 brx (Assembler::notZero, false, Assembler::pn, done) ; | |
3668 delayed()-> | |
727 | 3669 ld_ptr (Rmark, ObjectMonitor::EntryList_offset_in_bytes() - 2, Rscratch); |
3670 ld_ptr (Rmark, ObjectMonitor::cxq_offset_in_bytes() - 2, Rbox); | |
0 | 3671 orcc (Rbox, Rscratch, G0) ; |
3672 if (EmitSync & 65536) { | |
3673 Label LSucc ; | |
3674 brx (Assembler::notZero, false, Assembler::pn, LSucc) ; | |
3675 delayed()->nop() ; | |
3676 br (Assembler::always, false, Assembler::pt, done) ; | |
3677 delayed()-> | |
727 | 3678 st_ptr (G0, Rmark, ObjectMonitor::owner_offset_in_bytes() - 2); |
0 | 3679 |
3680 bind (LSucc) ; | |
727 | 3681 st_ptr (G0, Rmark, ObjectMonitor::owner_offset_in_bytes() - 2); |
0 | 3682 if (os::is_MP()) { membar (StoreLoad) ; } |
727 | 3683 ld_ptr (Rmark, ObjectMonitor::succ_offset_in_bytes() - 2, Rscratch); |
0 | 3684 andcc (Rscratch, Rscratch, G0) ; |
3685 brx (Assembler::notZero, false, Assembler::pt, done) ; | |
3686 delayed()-> andcc (G0, G0, G0) ; | |
3687 add (Rmark, ObjectMonitor::owner_offset_in_bytes()-2, Rmark) ; | |
3688 mov (G2_thread, Rscratch) ; | |
3689 casn (Rmark, G0, Rscratch) ; | |
3690 cmp (Rscratch, G0) ; | |
3691 // invert icc.zf and goto done | |
3692 brx (Assembler::notZero, false, Assembler::pt, done) ; | |
3693 delayed() -> cmp (G0, G0) ; | |
3694 br (Assembler::always, false, Assembler::pt, done); | |
3695 delayed() -> cmp (G0, 1) ; | |
3696 } else { | |
3697 brx (Assembler::notZero, false, Assembler::pn, done) ; | |
3698 delayed()->nop() ; | |
3699 br (Assembler::always, false, Assembler::pt, done) ; | |
3700 delayed()-> | |
727 | 3701 st_ptr (G0, Rmark, ObjectMonitor::owner_offset_in_bytes() - 2); |
0 | 3702 } |
3703 | |
3704 bind (LStacked) ; | |
3705 // Consider: we could replace the expensive CAS in the exit | |
3706 // path with a simple ST of the displaced mark value fetched from | |
3707 // the on-stack basiclock box. That admits a race where a thread T2 | |
3708 // in the slow lock path -- inflating with monitor M -- could race a | |
3709 // thread T1 in the fast unlock path, resulting in a missed wakeup for T2. | |
3710 // More precisely T1 in the stack-lock unlock path could "stomp" the | |
3711 // inflated mark value M installed by T2, resulting in an orphan | |
3712 // object monitor M and T2 becoming stranded. We can remedy that situation | |
3713 // by having T2 periodically poll the object's mark word using timed wait | |
3714 // operations. If T2 discovers that a stomp has occurred it vacates | |
3715 // the monitor M and wakes any other threads stranded on the now-orphan M. | |
3716 // In addition the monitor scavenger, which performs deflation, | |
3717 // would also need to check for orpan monitors and stranded threads. | |
3718 // | |
3719 // Finally, inflation is also used when T2 needs to assign a hashCode | |
3720 // to O and O is stack-locked by T1. The "stomp" race could cause | |
3721 // an assigned hashCode value to be lost. We can avoid that condition | |
3722 // and provide the necessary hashCode stability invariants by ensuring | |
3723 // that hashCode generation is idempotent between copying GCs. | |
3724 // For example we could compute the hashCode of an object O as | |
3725 // O's heap address XOR some high quality RNG value that is refreshed | |
3726 // at GC-time. The monitor scavenger would install the hashCode | |
3727 // found in any orphan monitors. Again, the mechanism admits a | |
3728 // lost-update "stomp" WAW race but detects and recovers as needed. | |
3729 // | |
3730 // A prototype implementation showed excellent results, although | |
3731 // the scavenger and timeout code was rather involved. | |
3732 | |
3733 casn (mark_addr.base(), Rbox, Rscratch) ; | |
3734 cmp (Rbox, Rscratch); | |
3735 // Intentional fall through into done ... | |
3736 | |
3737 bind (done) ; | |
3738 } | |
3739 | |
3740 | |
3741 | |
3742 void MacroAssembler::print_CPU_state() { | |
3743 // %%%%% need to implement this | |
3744 } | |
3745 | |
3746 void MacroAssembler::verify_FPU(int stack_depth, const char* s) { | |
3747 // %%%%% need to implement this | |
3748 } | |
3749 | |
3750 void MacroAssembler::push_IU_state() { | |
3751 // %%%%% need to implement this | |
3752 } | |
3753 | |
3754 | |
3755 void MacroAssembler::pop_IU_state() { | |
3756 // %%%%% need to implement this | |
3757 } | |
3758 | |
3759 | |
3760 void MacroAssembler::push_FPU_state() { | |
3761 // %%%%% need to implement this | |
3762 } | |
3763 | |
3764 | |
3765 void MacroAssembler::pop_FPU_state() { | |
3766 // %%%%% need to implement this | |
3767 } | |
3768 | |
3769 | |
3770 void MacroAssembler::push_CPU_state() { | |
3771 // %%%%% need to implement this | |
3772 } | |
3773 | |
3774 | |
3775 void MacroAssembler::pop_CPU_state() { | |
3776 // %%%%% need to implement this | |
3777 } | |
3778 | |
3779 | |
3780 | |
3781 void MacroAssembler::verify_tlab() { | |
3782 #ifdef ASSERT | |
3783 if (UseTLAB && VerifyOops) { | |
3784 Label next, next2, ok; | |
3785 Register t1 = L0; | |
3786 Register t2 = L1; | |
3787 Register t3 = L2; | |
3788 | |
3789 save_frame(0); | |
3790 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_top_offset()), t1); | |
3791 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_start_offset()), t2); | |
3792 or3(t1, t2, t3); | |
3793 cmp(t1, t2); | |
3794 br(Assembler::greaterEqual, false, Assembler::pn, next); | |
3795 delayed()->nop(); | |
3796 stop("assert(top >= start)"); | |
3797 should_not_reach_here(); | |
3798 | |
3799 bind(next); | |
3800 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_top_offset()), t1); | |
3801 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_end_offset()), t2); | |
3802 or3(t3, t2, t3); | |
3803 cmp(t1, t2); | |
3804 br(Assembler::lessEqual, false, Assembler::pn, next2); | |
3805 delayed()->nop(); | |
3806 stop("assert(top <= end)"); | |
3807 should_not_reach_here(); | |
3808 | |
3809 bind(next2); | |
3810 and3(t3, MinObjAlignmentInBytesMask, t3); | |
3811 cmp(t3, 0); | |
3812 br(Assembler::lessEqual, false, Assembler::pn, ok); | |
3813 delayed()->nop(); | |
3814 stop("assert(aligned)"); | |
3815 should_not_reach_here(); | |
3816 | |
3817 bind(ok); | |
3818 restore(); | |
3819 } | |
3820 #endif | |
3821 } | |
3822 | |
3823 | |
3824 void MacroAssembler::eden_allocate( | |
3825 Register obj, // result: pointer to object after successful allocation | |
3826 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise | |
3827 int con_size_in_bytes, // object size in bytes if known at compile time | |
3828 Register t1, // temp register | |
3829 Register t2, // temp register | |
3830 Label& slow_case // continuation point if fast allocation fails | |
3831 ){ | |
3832 // make sure arguments make sense | |
3833 assert_different_registers(obj, var_size_in_bytes, t1, t2); | |
3834 assert(0 <= con_size_in_bytes && Assembler::is_simm13(con_size_in_bytes), "illegal object size"); | |
3835 assert((con_size_in_bytes & MinObjAlignmentInBytesMask) == 0, "object size is not multiple of alignment"); | |
3836 | |
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3837 if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) { |
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3838 // No allocation in the shared eden. |
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3839 br(Assembler::always, false, Assembler::pt, slow_case); |
0 | 3840 delayed()->nop(); |
342
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3841 } else { |
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3842 // get eden boundaries |
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3843 // note: we need both top & top_addr! |
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3844 const Register top_addr = t1; |
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3845 const Register end = t2; |
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3846 |
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3847 CollectedHeap* ch = Universe::heap(); |
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3848 set((intx)ch->top_addr(), top_addr); |
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3849 intx delta = (intx)ch->end_addr() - (intx)ch->top_addr(); |
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3850 ld_ptr(top_addr, delta, end); |
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3851 ld_ptr(top_addr, 0, obj); |
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3852 |
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3853 // try to allocate |
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3854 Label retry; |
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3855 bind(retry); |
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3856 #ifdef ASSERT |
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3857 // make sure eden top is properly aligned |
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3858 { |
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3859 Label L; |
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3860 btst(MinObjAlignmentInBytesMask, obj); |
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3861 br(Assembler::zero, false, Assembler::pt, L); |
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3862 delayed()->nop(); |
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3863 stop("eden top is not properly aligned"); |
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3864 bind(L); |
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3865 } |
0 | 3866 #endif // ASSERT |
342
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3867 const Register free = end; |
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3868 sub(end, obj, free); // compute amount of free space |
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3869 if (var_size_in_bytes->is_valid()) { |
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3870 // size is unknown at compile time |
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3871 cmp(free, var_size_in_bytes); |
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3872 br(Assembler::lessUnsigned, false, Assembler::pn, slow_case); // if there is not enough space go the slow case |
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3873 delayed()->add(obj, var_size_in_bytes, end); |
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3874 } else { |
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3875 // size is known at compile time |
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3876 cmp(free, con_size_in_bytes); |
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3877 br(Assembler::lessUnsigned, false, Assembler::pn, slow_case); // if there is not enough space go the slow case |
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3878 delayed()->add(obj, con_size_in_bytes, end); |
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3879 } |
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3880 // Compare obj with the value at top_addr; if still equal, swap the value of |
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3881 // end with the value at top_addr. If not equal, read the value at top_addr |
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3882 // into end. |
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3883 casx_under_lock(top_addr, obj, end, (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr()); |
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3884 // if someone beat us on the allocation, try again, otherwise continue |
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3885 cmp(obj, end); |
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3886 brx(Assembler::notEqual, false, Assembler::pn, retry); |
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3887 delayed()->mov(end, obj); // nop if successfull since obj == end |
0 | 3888 |
3889 #ifdef ASSERT | |
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3890 // make sure eden top is properly aligned |
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3891 { |
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3892 Label L; |
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3893 const Register top_addr = t1; |
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3894 |
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3895 set((intx)ch->top_addr(), top_addr); |
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3896 ld_ptr(top_addr, 0, top_addr); |
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3897 btst(MinObjAlignmentInBytesMask, top_addr); |
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3898 br(Assembler::zero, false, Assembler::pt, L); |
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3899 delayed()->nop(); |
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3900 stop("eden top is not properly aligned"); |
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3901 bind(L); |
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3902 } |
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3903 #endif // ASSERT |
0 | 3904 } |
3905 } | |
3906 | |
3907 | |
3908 void MacroAssembler::tlab_allocate( | |
3909 Register obj, // result: pointer to object after successful allocation | |
3910 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise | |
3911 int con_size_in_bytes, // object size in bytes if known at compile time | |
3912 Register t1, // temp register | |
3913 Label& slow_case // continuation point if fast allocation fails | |
3914 ){ | |
3915 // make sure arguments make sense | |
3916 assert_different_registers(obj, var_size_in_bytes, t1); | |
3917 assert(0 <= con_size_in_bytes && is_simm13(con_size_in_bytes), "illegal object size"); | |
3918 assert((con_size_in_bytes & MinObjAlignmentInBytesMask) == 0, "object size is not multiple of alignment"); | |
3919 | |
3920 const Register free = t1; | |
3921 | |
3922 verify_tlab(); | |
3923 | |
3924 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_top_offset()), obj); | |
3925 | |
3926 // calculate amount of free space | |
3927 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_end_offset()), free); | |
3928 sub(free, obj, free); | |
3929 | |
3930 Label done; | |
3931 if (var_size_in_bytes == noreg) { | |
3932 cmp(free, con_size_in_bytes); | |
3933 } else { | |
3934 cmp(free, var_size_in_bytes); | |
3935 } | |
3936 br(Assembler::less, false, Assembler::pn, slow_case); | |
3937 // calculate the new top pointer | |
3938 if (var_size_in_bytes == noreg) { | |
3939 delayed()->add(obj, con_size_in_bytes, free); | |
3940 } else { | |
3941 delayed()->add(obj, var_size_in_bytes, free); | |
3942 } | |
3943 | |
3944 bind(done); | |
3945 | |
3946 #ifdef ASSERT | |
3947 // make sure new free pointer is properly aligned | |
3948 { | |
3949 Label L; | |
3950 btst(MinObjAlignmentInBytesMask, free); | |
3951 br(Assembler::zero, false, Assembler::pt, L); | |
3952 delayed()->nop(); | |
3953 stop("updated TLAB free is not properly aligned"); | |
3954 bind(L); | |
3955 } | |
3956 #endif // ASSERT | |
3957 | |
3958 // update the tlab top pointer | |
3959 st_ptr(free, G2_thread, in_bytes(JavaThread::tlab_top_offset())); | |
3960 verify_tlab(); | |
3961 } | |
3962 | |
3963 | |
3964 void MacroAssembler::tlab_refill(Label& retry, Label& try_eden, Label& slow_case) { | |
3965 Register top = O0; | |
3966 Register t1 = G1; | |
3967 Register t2 = G3; | |
3968 Register t3 = O1; | |
3969 assert_different_registers(top, t1, t2, t3, G4, G5 /* preserve G4 and G5 */); | |
3970 Label do_refill, discard_tlab; | |
3971 | |
3972 if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) { | |
3973 // No allocation in the shared eden. | |
3974 br(Assembler::always, false, Assembler::pt, slow_case); | |
3975 delayed()->nop(); | |
3976 } | |
3977 | |
3978 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_top_offset()), top); | |
3979 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_end_offset()), t1); | |
3980 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_refill_waste_limit_offset()), t2); | |
3981 | |
3982 // calculate amount of free space | |
3983 sub(t1, top, t1); | |
3984 srl_ptr(t1, LogHeapWordSize, t1); | |
3985 | |
3986 // Retain tlab and allocate object in shared space if | |
3987 // the amount free in the tlab is too large to discard. | |
3988 cmp(t1, t2); | |
3989 brx(Assembler::lessEqual, false, Assembler::pt, discard_tlab); | |
3990 | |
3991 // increment waste limit to prevent getting stuck on this slow path | |
3992 delayed()->add(t2, ThreadLocalAllocBuffer::refill_waste_limit_increment(), t2); | |
3993 st_ptr(t2, G2_thread, in_bytes(JavaThread::tlab_refill_waste_limit_offset())); | |
3994 if (TLABStats) { | |
3995 // increment number of slow_allocations | |
3996 ld(G2_thread, in_bytes(JavaThread::tlab_slow_allocations_offset()), t2); | |
3997 add(t2, 1, t2); | |
3998 stw(t2, G2_thread, in_bytes(JavaThread::tlab_slow_allocations_offset())); | |
3999 } | |
4000 br(Assembler::always, false, Assembler::pt, try_eden); | |
4001 delayed()->nop(); | |
4002 | |
4003 bind(discard_tlab); | |
4004 if (TLABStats) { | |
4005 // increment number of refills | |
4006 ld(G2_thread, in_bytes(JavaThread::tlab_number_of_refills_offset()), t2); | |
4007 add(t2, 1, t2); | |
4008 stw(t2, G2_thread, in_bytes(JavaThread::tlab_number_of_refills_offset())); | |
4009 // accumulate wastage | |
4010 ld(G2_thread, in_bytes(JavaThread::tlab_fast_refill_waste_offset()), t2); | |
4011 add(t2, t1, t2); | |
4012 stw(t2, G2_thread, in_bytes(JavaThread::tlab_fast_refill_waste_offset())); | |
4013 } | |
4014 | |
4015 // if tlab is currently allocated (top or end != null) then | |
4016 // fill [top, end + alignment_reserve) with array object | |
4017 br_null(top, false, Assembler::pn, do_refill); | |
4018 delayed()->nop(); | |
4019 | |
4020 set((intptr_t)markOopDesc::prototype()->copy_set_hash(0x2), t2); | |
4021 st_ptr(t2, top, oopDesc::mark_offset_in_bytes()); // set up the mark word | |
4022 // set klass to intArrayKlass | |
4023 sub(t1, typeArrayOopDesc::header_size(T_INT), t1); | |
4024 add(t1, ThreadLocalAllocBuffer::alignment_reserve(), t1); | |
4025 sll_ptr(t1, log2_intptr(HeapWordSize/sizeof(jint)), t1); | |
4026 st(t1, top, arrayOopDesc::length_offset_in_bytes()); | |
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4027 set((intptr_t)Universe::intArrayKlassObj_addr(), t2); |
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4028 ld_ptr(t2, 0, t2); |
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4029 // store klass last. concurrent gcs assumes klass length is valid if |
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4030 // klass field is not null. |
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4031 store_klass(t2, top); |
0 | 4032 verify_oop(top); |
4033 | |
4034 // refill the tlab with an eden allocation | |
4035 bind(do_refill); | |
4036 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_size_offset()), t1); | |
4037 sll_ptr(t1, LogHeapWordSize, t1); | |
4038 // add object_size ?? | |
4039 eden_allocate(top, t1, 0, t2, t3, slow_case); | |
4040 | |
4041 st_ptr(top, G2_thread, in_bytes(JavaThread::tlab_start_offset())); | |
4042 st_ptr(top, G2_thread, in_bytes(JavaThread::tlab_top_offset())); | |
4043 #ifdef ASSERT | |
4044 // check that tlab_size (t1) is still valid | |
4045 { | |
4046 Label ok; | |
4047 ld_ptr(G2_thread, in_bytes(JavaThread::tlab_size_offset()), t2); | |
4048 sll_ptr(t2, LogHeapWordSize, t2); | |
4049 cmp(t1, t2); | |
4050 br(Assembler::equal, false, Assembler::pt, ok); | |
4051 delayed()->nop(); | |
4052 stop("assert(t1 == tlab_size)"); | |
4053 should_not_reach_here(); | |
4054 | |
4055 bind(ok); | |
4056 } | |
4057 #endif // ASSERT | |
4058 add(top, t1, top); // t1 is tlab_size | |
4059 sub(top, ThreadLocalAllocBuffer::alignment_reserve_in_bytes(), top); | |
4060 st_ptr(top, G2_thread, in_bytes(JavaThread::tlab_end_offset())); | |
4061 verify_tlab(); | |
4062 br(Assembler::always, false, Assembler::pt, retry); | |
4063 delayed()->nop(); | |
4064 } | |
4065 | |
4066 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) { | |
4067 switch (cond) { | |
4068 // Note some conditions are synonyms for others | |
4069 case Assembler::never: return Assembler::always; | |
4070 case Assembler::zero: return Assembler::notZero; | |
4071 case Assembler::lessEqual: return Assembler::greater; | |
4072 case Assembler::less: return Assembler::greaterEqual; | |
4073 case Assembler::lessEqualUnsigned: return Assembler::greaterUnsigned; | |
4074 case Assembler::lessUnsigned: return Assembler::greaterEqualUnsigned; | |
4075 case Assembler::negative: return Assembler::positive; | |
4076 case Assembler::overflowSet: return Assembler::overflowClear; | |
4077 case Assembler::always: return Assembler::never; | |
4078 case Assembler::notZero: return Assembler::zero; | |
4079 case Assembler::greater: return Assembler::lessEqual; | |
4080 case Assembler::greaterEqual: return Assembler::less; | |
4081 case Assembler::greaterUnsigned: return Assembler::lessEqualUnsigned; | |
4082 case Assembler::greaterEqualUnsigned: return Assembler::lessUnsigned; | |
4083 case Assembler::positive: return Assembler::negative; | |
4084 case Assembler::overflowClear: return Assembler::overflowSet; | |
4085 } | |
4086 | |
4087 ShouldNotReachHere(); return Assembler::overflowClear; | |
4088 } | |
4089 | |
4090 void MacroAssembler::cond_inc(Assembler::Condition cond, address counter_ptr, | |
4091 Register Rtmp1, Register Rtmp2 /*, Register Rtmp3, Register Rtmp4 */) { | |
4092 Condition negated_cond = negate_condition(cond); | |
4093 Label L; | |
4094 brx(negated_cond, false, Assembler::pt, L); | |
4095 delayed()->nop(); | |
4096 inc_counter(counter_ptr, Rtmp1, Rtmp2); | |
4097 bind(L); | |
4098 } | |
4099 | |
727 | 4100 void MacroAssembler::inc_counter(address counter_addr, Register Rtmp1, Register Rtmp2) { |
4101 AddressLiteral addrlit(counter_addr); | |
4102 sethi(addrlit, Rtmp1); // Move hi22 bits into temporary register. | |
4103 Address addr(Rtmp1, addrlit.low10()); // Build an address with low10 bits. | |
4104 ld(addr, Rtmp2); | |
0 | 4105 inc(Rtmp2); |
727 | 4106 st(Rtmp2, addr); |
4107 } | |
4108 | |
4109 void MacroAssembler::inc_counter(int* counter_addr, Register Rtmp1, Register Rtmp2) { | |
4110 inc_counter((address) counter_addr, Rtmp1, Rtmp2); | |
0 | 4111 } |
4112 | |
4113 SkipIfEqual::SkipIfEqual( | |
4114 MacroAssembler* masm, Register temp, const bool* flag_addr, | |
4115 Assembler::Condition condition) { | |
4116 _masm = masm; | |
727 | 4117 AddressLiteral flag(flag_addr); |
4118 _masm->sethi(flag, temp); | |
4119 _masm->ldub(temp, flag.low10(), temp); | |
0 | 4120 _masm->tst(temp); |
4121 _masm->br(condition, false, Assembler::pt, _label); | |
4122 _masm->delayed()->nop(); | |
4123 } | |
4124 | |
4125 SkipIfEqual::~SkipIfEqual() { | |
4126 _masm->bind(_label); | |
4127 } | |
4128 | |
4129 | |
4130 // Writes to stack successive pages until offset reached to check for | |
4131 // stack overflow + shadow pages. This clobbers tsp and scratch. | |
4132 void MacroAssembler::bang_stack_size(Register Rsize, Register Rtsp, | |
4133 Register Rscratch) { | |
4134 // Use stack pointer in temp stack pointer | |
4135 mov(SP, Rtsp); | |
4136 | |
4137 // Bang stack for total size given plus stack shadow page size. | |
4138 // Bang one page at a time because a large size can overflow yellow and | |
4139 // red zones (the bang will fail but stack overflow handling can't tell that | |
4140 // it was a stack overflow bang vs a regular segv). | |
4141 int offset = os::vm_page_size(); | |
4142 Register Roffset = Rscratch; | |
4143 | |
4144 Label loop; | |
4145 bind(loop); | |
4146 set((-offset)+STACK_BIAS, Rscratch); | |
4147 st(G0, Rtsp, Rscratch); | |
4148 set(offset, Roffset); | |
4149 sub(Rsize, Roffset, Rsize); | |
4150 cmp(Rsize, G0); | |
4151 br(Assembler::greater, false, Assembler::pn, loop); | |
4152 delayed()->sub(Rtsp, Roffset, Rtsp); | |
4153 | |
4154 // Bang down shadow pages too. | |
4155 // The -1 because we already subtracted 1 page. | |
4156 for (int i = 0; i< StackShadowPages-1; i++) { | |
4157 set((-i*offset)+STACK_BIAS, Rscratch); | |
4158 st(G0, Rtsp, Rscratch); | |
4159 } | |
4160 } | |
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4161 |
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4162 /////////////////////////////////////////////////////////////////////////////////// |
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4163 #ifndef SERIALGC |
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4164 |
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4165 static uint num_stores = 0; |
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4166 static uint num_null_pre_stores = 0; |
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4167 |
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4168 static void count_null_pre_vals(void* pre_val) { |
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4169 num_stores++; |
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4170 if (pre_val == NULL) num_null_pre_stores++; |
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4171 if ((num_stores % 1000000) == 0) { |
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4172 tty->print_cr(UINT32_FORMAT " stores, " UINT32_FORMAT " (%5.2f%%) with null pre-vals.", |
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4173 num_stores, num_null_pre_stores, |
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4174 100.0*(float)num_null_pre_stores/(float)num_stores); |
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4175 } |
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4176 } |
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4177 |
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4178 static address satb_log_enqueue_with_frame = 0; |
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4179 static u_char* satb_log_enqueue_with_frame_end = 0; |
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4180 |
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4181 static address satb_log_enqueue_frameless = 0; |
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4182 static u_char* satb_log_enqueue_frameless_end = 0; |
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4183 |
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4184 static int EnqueueCodeSize = 128 DEBUG_ONLY( + 256); // Instructions? |
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4185 |
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4186 // The calls to this don't work. We'd need to do a fair amount of work to |
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4187 // make it work. |
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4188 static void check_index(int ind) { |
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4189 assert(0 <= ind && ind <= 64*K && ((ind % oopSize) == 0), |
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4190 "Invariants."); |
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4191 } |
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4192 |
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4193 static void generate_satb_log_enqueue(bool with_frame) { |
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4194 BufferBlob* bb = BufferBlob::create("enqueue_with_frame", EnqueueCodeSize); |
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4195 CodeBuffer buf(bb->instructions_begin(), bb->instructions_size()); |
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4196 MacroAssembler masm(&buf); |
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4197 address start = masm.pc(); |
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4198 Register pre_val; |
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4199 |
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4200 Label refill, restart; |
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4201 if (with_frame) { |
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4202 masm.save_frame(0); |
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4203 pre_val = I0; // Was O0 before the save. |
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4204 } else { |
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4205 pre_val = O0; |
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4206 } |
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4207 int satb_q_index_byte_offset = |
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4208 in_bytes(JavaThread::satb_mark_queue_offset() + |
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4209 PtrQueue::byte_offset_of_index()); |
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4210 int satb_q_buf_byte_offset = |
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4211 in_bytes(JavaThread::satb_mark_queue_offset() + |
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4212 PtrQueue::byte_offset_of_buf()); |
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4213 assert(in_bytes(PtrQueue::byte_width_of_index()) == sizeof(intptr_t) && |
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4214 in_bytes(PtrQueue::byte_width_of_buf()) == sizeof(intptr_t), |
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4215 "check sizes in assembly below"); |
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4216 |
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4217 masm.bind(restart); |
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4218 masm.ld_ptr(G2_thread, satb_q_index_byte_offset, L0); |
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4219 |
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4220 masm.br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pn, L0, refill); |
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4221 // If the branch is taken, no harm in executing this in the delay slot. |
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4222 masm.delayed()->ld_ptr(G2_thread, satb_q_buf_byte_offset, L1); |
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4223 masm.sub(L0, oopSize, L0); |
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4224 |
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4225 masm.st_ptr(pre_val, L1, L0); // [_buf + index] := I0 |
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|
4226 if (!with_frame) { |
37f87013dfd8
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124
diff
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|
4227 // Use return-from-leaf |
37f87013dfd8
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124
diff
changeset
|
4228 masm.retl(); |
37f87013dfd8
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diff
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|
4229 masm.delayed()->st_ptr(L0, G2_thread, satb_q_index_byte_offset); |
37f87013dfd8
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124
diff
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|
4230 } else { |
37f87013dfd8
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124
diff
changeset
|
4231 // Not delayed. |
37f87013dfd8
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diff
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|
4232 masm.st_ptr(L0, G2_thread, satb_q_index_byte_offset); |
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diff
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|
4233 } |
37f87013dfd8
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124
diff
changeset
|
4234 if (with_frame) { |
37f87013dfd8
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124
diff
changeset
|
4235 masm.ret(); |
37f87013dfd8
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124
diff
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|
4236 masm.delayed()->restore(); |
37f87013dfd8
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124
diff
changeset
|
4237 } |
37f87013dfd8
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124
diff
changeset
|
4238 masm.bind(refill); |
37f87013dfd8
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124
diff
changeset
|
4239 |
37f87013dfd8
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124
diff
changeset
|
4240 address handle_zero = |
37f87013dfd8
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124
diff
changeset
|
4241 CAST_FROM_FN_PTR(address, |
37f87013dfd8
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124
diff
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|
4242 &SATBMarkQueueSet::handle_zero_index_for_thread); |
37f87013dfd8
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124
diff
changeset
|
4243 // This should be rare enough that we can afford to save all the |
37f87013dfd8
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124
diff
changeset
|
4244 // scratch registers that the calling context might be using. |
37f87013dfd8
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124
diff
changeset
|
4245 masm.mov(G1_scratch, L0); |
37f87013dfd8
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124
diff
changeset
|
4246 masm.mov(G3_scratch, L1); |
37f87013dfd8
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124
diff
changeset
|
4247 masm.mov(G4, L2); |
37f87013dfd8
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124
diff
changeset
|
4248 // We need the value of O0 above (for the write into the buffer), so we |
37f87013dfd8
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124
diff
changeset
|
4249 // save and restore it. |
37f87013dfd8
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124
diff
changeset
|
4250 masm.mov(O0, L3); |
37f87013dfd8
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diff
changeset
|
4251 // Since the call will overwrite O7, we save and restore that, as well. |
37f87013dfd8
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124
diff
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|
4252 masm.mov(O7, L4); |
37f87013dfd8
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124
diff
changeset
|
4253 masm.call_VM_leaf(L5, handle_zero, G2_thread); |
37f87013dfd8
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124
diff
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|
4254 masm.mov(L0, G1_scratch); |
37f87013dfd8
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124
diff
changeset
|
4255 masm.mov(L1, G3_scratch); |
37f87013dfd8
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124
diff
changeset
|
4256 masm.mov(L2, G4); |
37f87013dfd8
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124
diff
changeset
|
4257 masm.mov(L3, O0); |
37f87013dfd8
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124
diff
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|
4258 masm.br(Assembler::always, /*annul*/false, Assembler::pt, restart); |
37f87013dfd8
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diff
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|
4259 masm.delayed()->mov(L4, O7); |
37f87013dfd8
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124
diff
changeset
|
4260 |
37f87013dfd8
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124
diff
changeset
|
4261 if (with_frame) { |
37f87013dfd8
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124
diff
changeset
|
4262 satb_log_enqueue_with_frame = start; |
37f87013dfd8
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124
diff
changeset
|
4263 satb_log_enqueue_with_frame_end = masm.pc(); |
37f87013dfd8
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124
diff
changeset
|
4264 } else { |
37f87013dfd8
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124
diff
changeset
|
4265 satb_log_enqueue_frameless = start; |
37f87013dfd8
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124
diff
changeset
|
4266 satb_log_enqueue_frameless_end = masm.pc(); |
37f87013dfd8
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124
diff
changeset
|
4267 } |
37f87013dfd8
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124
diff
changeset
|
4268 } |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
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124
diff
changeset
|
4269 |
37f87013dfd8
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124
diff
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|
4270 static inline void generate_satb_log_enqueue_if_necessary(bool with_frame) { |
37f87013dfd8
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124
diff
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|
4271 if (with_frame) { |
37f87013dfd8
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124
diff
changeset
|
4272 if (satb_log_enqueue_with_frame == 0) { |
37f87013dfd8
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124
diff
changeset
|
4273 generate_satb_log_enqueue(with_frame); |
37f87013dfd8
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124
diff
changeset
|
4274 assert(satb_log_enqueue_with_frame != 0, "postcondition."); |
37f87013dfd8
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124
diff
changeset
|
4275 if (G1SATBPrintStubs) { |
37f87013dfd8
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124
diff
changeset
|
4276 tty->print_cr("Generated with-frame satb enqueue:"); |
37f87013dfd8
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124
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|
4277 Disassembler::decode((u_char*)satb_log_enqueue_with_frame, |
37f87013dfd8
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124
diff
changeset
|
4278 satb_log_enqueue_with_frame_end, |
37f87013dfd8
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124
diff
changeset
|
4279 tty); |
37f87013dfd8
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124
diff
changeset
|
4280 } |
37f87013dfd8
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124
diff
changeset
|
4281 } |
37f87013dfd8
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ysr
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124
diff
changeset
|
4282 } else { |
37f87013dfd8
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124
diff
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|
4283 if (satb_log_enqueue_frameless == 0) { |
37f87013dfd8
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124
diff
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|
4284 generate_satb_log_enqueue(with_frame); |
37f87013dfd8
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124
diff
changeset
|
4285 assert(satb_log_enqueue_frameless != 0, "postcondition."); |
37f87013dfd8
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124
diff
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|
4286 if (G1SATBPrintStubs) { |
37f87013dfd8
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124
diff
changeset
|
4287 tty->print_cr("Generated frameless satb enqueue:"); |
37f87013dfd8
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124
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|
4288 Disassembler::decode((u_char*)satb_log_enqueue_frameless, |
37f87013dfd8
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124
diff
changeset
|
4289 satb_log_enqueue_frameless_end, |
37f87013dfd8
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124
diff
changeset
|
4290 tty); |
37f87013dfd8
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124
diff
changeset
|
4291 } |
37f87013dfd8
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124
diff
changeset
|
4292 } |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
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124
diff
changeset
|
4293 } |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
124
diff
changeset
|
4294 } |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
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parents:
124
diff
changeset
|
4295 |
37f87013dfd8
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124
diff
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|
4296 void MacroAssembler::g1_write_barrier_pre(Register obj, Register index, int offset, Register tmp, bool preserve_o_regs) { |
37f87013dfd8
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|
4297 assert(offset == 0 || index == noreg, "choose one"); |
37f87013dfd8
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124
diff
changeset
|
4298 |
37f87013dfd8
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124
diff
changeset
|
4299 if (G1DisablePreBarrier) return; |
37f87013dfd8
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124
diff
changeset
|
4300 // satb_log_barrier(tmp, obj, offset, preserve_o_regs); |
37f87013dfd8
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diff
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|
4301 Label filtered; |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
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124
diff
changeset
|
4302 // satb_log_barrier_work0(tmp, filtered); |
37f87013dfd8
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|
4303 if (in_bytes(PtrQueue::byte_width_of_active()) == 4) { |
37f87013dfd8
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124
diff
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|
4304 ld(G2, |
37f87013dfd8
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124
diff
changeset
|
4305 in_bytes(JavaThread::satb_mark_queue_offset() + |
37f87013dfd8
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124
diff
changeset
|
4306 PtrQueue::byte_offset_of_active()), |
37f87013dfd8
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124
diff
changeset
|
4307 tmp); |
37f87013dfd8
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124
diff
changeset
|
4308 } else { |
37f87013dfd8
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124
diff
changeset
|
4309 guarantee(in_bytes(PtrQueue::byte_width_of_active()) == 1, |
37f87013dfd8
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124
diff
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|
4310 "Assumption"); |
37f87013dfd8
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124
diff
changeset
|
4311 ldsb(G2, |
37f87013dfd8
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124
diff
changeset
|
4312 in_bytes(JavaThread::satb_mark_queue_offset() + |
37f87013dfd8
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124
diff
changeset
|
4313 PtrQueue::byte_offset_of_active()), |
37f87013dfd8
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124
diff
changeset
|
4314 tmp); |
37f87013dfd8
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diff
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|
4315 } |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
794
diff
changeset
|
4316 |
342
37f87013dfd8
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124
diff
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|
4317 // Check on whether to annul. |
37f87013dfd8
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diff
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|
4318 br_on_reg_cond(rc_z, /*annul*/false, Assembler::pt, tmp, filtered); |
37f87013dfd8
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diff
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|
4319 delayed() -> nop(); |
37f87013dfd8
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124
diff
changeset
|
4320 |
37f87013dfd8
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|
4321 // satb_log_barrier_work1(tmp, offset); |
37f87013dfd8
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diff
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|
4322 if (index == noreg) { |
37f87013dfd8
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124
diff
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|
4323 if (Assembler::is_simm13(offset)) { |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
794
diff
changeset
|
4324 load_heap_oop(obj, offset, tmp); |
342
37f87013dfd8
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124
diff
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|
4325 } else { |
37f87013dfd8
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124
diff
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|
4326 set(offset, tmp); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
794
diff
changeset
|
4327 load_heap_oop(obj, tmp, tmp); |
342
37f87013dfd8
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|
4328 } |
37f87013dfd8
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124
diff
changeset
|
4329 } else { |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
794
diff
changeset
|
4330 load_heap_oop(obj, index, tmp); |
342
37f87013dfd8
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|
4331 } |
37f87013dfd8
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124
diff
changeset
|
4332 |
37f87013dfd8
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|
4333 // satb_log_barrier_work2(obj, tmp, offset); |
37f87013dfd8
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|
4334 |
37f87013dfd8
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124
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|
4335 // satb_log_barrier_work3(tmp, filtered, preserve_o_regs); |
37f87013dfd8
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|
4336 |
37f87013dfd8
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124
diff
changeset
|
4337 const Register pre_val = tmp; |
37f87013dfd8
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124
diff
changeset
|
4338 |
37f87013dfd8
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|
4339 if (G1SATBBarrierPrintNullPreVals) { |
37f87013dfd8
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124
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|
4340 save_frame(0); |
37f87013dfd8
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124
diff
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|
4341 mov(pre_val, O0); |
37f87013dfd8
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124
diff
changeset
|
4342 // Save G-regs that target may use. |
37f87013dfd8
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diff
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|
4343 mov(G1, L1); |
37f87013dfd8
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124
diff
changeset
|
4344 mov(G2, L2); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
124
diff
changeset
|
4345 mov(G3, L3); |
37f87013dfd8
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124
diff
changeset
|
4346 mov(G4, L4); |
37f87013dfd8
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124
diff
changeset
|
4347 mov(G5, L5); |
37f87013dfd8
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|
4348 call(CAST_FROM_FN_PTR(address, &count_null_pre_vals)); |
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|
4349 delayed()->nop(); |
37f87013dfd8
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124
diff
changeset
|
4350 // Restore G-regs that target may have used. |
37f87013dfd8
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124
diff
changeset
|
4351 mov(L1, G1); |
37f87013dfd8
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124
diff
changeset
|
4352 mov(L2, G2); |
37f87013dfd8
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ysr
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124
diff
changeset
|
4353 mov(L3, G3); |
37f87013dfd8
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ysr
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124
diff
changeset
|
4354 mov(L4, G4); |
37f87013dfd8
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124
diff
changeset
|
4355 mov(L5, G5); |
37f87013dfd8
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diff
changeset
|
4356 restore(G0, G0, G0); |
37f87013dfd8
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124
diff
changeset
|
4357 } |
37f87013dfd8
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124
diff
changeset
|
4358 |
37f87013dfd8
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124
diff
changeset
|
4359 // Check on whether to annul. |
37f87013dfd8
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|
4360 br_on_reg_cond(rc_z, /*annul*/false, Assembler::pt, pre_val, filtered); |
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|
4361 delayed() -> nop(); |
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4362 |
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4363 // OK, it's not filtered, so we'll need to call enqueue. In the normal |
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4364 // case, pre_val will be a scratch G-reg, but there's some cases in which |
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4365 // it's an O-reg. In the first case, do a normal call. In the latter, |
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4366 // do a save here and call the frameless version. |
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|
4367 |
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|
4368 guarantee(pre_val->is_global() || pre_val->is_out(), |
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|
4369 "Or we need to think harder."); |
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|
4370 if (pre_val->is_global() && !preserve_o_regs) { |
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4371 generate_satb_log_enqueue_if_necessary(true); // with frame. |
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|
4372 call(satb_log_enqueue_with_frame); |
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|
4373 delayed()->mov(pre_val, O0); |
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|
4374 } else { |
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|
4375 generate_satb_log_enqueue_if_necessary(false); // with frameless. |
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|
4376 save_frame(0); |
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|
4377 call(satb_log_enqueue_frameless); |
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|
4378 delayed()->mov(pre_val->after_save(), O0); |
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|
4379 restore(); |
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|
4380 } |
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|
4381 |
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|
4382 bind(filtered); |
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|
4383 } |
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|
4384 |
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4385 static jint num_ct_writes = 0; |
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4386 static jint num_ct_writes_filtered_in_hr = 0; |
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4387 static jint num_ct_writes_filtered_null = 0; |
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4388 static G1CollectedHeap* g1 = NULL; |
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|
4389 |
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|
4390 static Thread* count_ct_writes(void* filter_val, void* new_val) { |
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4391 Atomic::inc(&num_ct_writes); |
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|
4392 if (filter_val == NULL) { |
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4393 Atomic::inc(&num_ct_writes_filtered_in_hr); |
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4394 } else if (new_val == NULL) { |
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|
4395 Atomic::inc(&num_ct_writes_filtered_null); |
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|
4396 } else { |
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|
4397 if (g1 == NULL) { |
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|
4398 g1 = G1CollectedHeap::heap(); |
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|
4399 } |
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|
4400 } |
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4401 if ((num_ct_writes % 1000000) == 0) { |
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|
4402 jint num_ct_writes_filtered = |
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4403 num_ct_writes_filtered_in_hr + |
677 | 4404 num_ct_writes_filtered_null; |
342
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|
4405 |
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|
4406 tty->print_cr("%d potential CT writes: %5.2f%% filtered\n" |
677 | 4407 " (%5.2f%% intra-HR, %5.2f%% null).", |
342
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|
4408 num_ct_writes, |
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|
4409 100.0*(float)num_ct_writes_filtered/(float)num_ct_writes, |
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|
4410 100.0*(float)num_ct_writes_filtered_in_hr/ |
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|
4411 (float)num_ct_writes, |
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|
4412 100.0*(float)num_ct_writes_filtered_null/ |
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|
4413 (float)num_ct_writes); |
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|
4414 } |
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|
4415 return Thread::current(); |
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|
4416 } |
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|
4417 |
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4418 static address dirty_card_log_enqueue = 0; |
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4419 static u_char* dirty_card_log_enqueue_end = 0; |
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4420 |
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4421 // This gets to assume that o0 contains the object address. |
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4422 static void generate_dirty_card_log_enqueue(jbyte* byte_map_base) { |
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4423 BufferBlob* bb = BufferBlob::create("dirty_card_enqueue", EnqueueCodeSize*2); |
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4424 CodeBuffer buf(bb->instructions_begin(), bb->instructions_size()); |
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4425 MacroAssembler masm(&buf); |
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4426 address start = masm.pc(); |
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|
4427 |
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|
4428 Label not_already_dirty, restart, refill; |
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|
4429 |
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|
4430 #ifdef _LP64 |
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4431 masm.srlx(O0, CardTableModRefBS::card_shift, O0); |
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|
4432 #else |
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4433 masm.srl(O0, CardTableModRefBS::card_shift, O0); |
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4434 #endif |
727 | 4435 AddressLiteral addrlit(byte_map_base); |
4436 masm.set(addrlit, O1); // O1 := <card table base> | |
342
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4437 masm.ldub(O0, O1, O2); // O2 := [O0 + O1] |
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|
4438 |
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4439 masm.br_on_reg_cond(Assembler::rc_nz, /*annul*/false, Assembler::pt, |
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|
4440 O2, not_already_dirty); |
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|
4441 // Get O1 + O2 into a reg by itself -- useful in the take-the-branch |
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|
4442 // case, harmless if not. |
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4443 masm.delayed()->add(O0, O1, O3); |
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|
4444 |
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4445 // We didn't take the branch, so we're already dirty: return. |
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|
4446 // Use return-from-leaf |
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|
4447 masm.retl(); |
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|
4448 masm.delayed()->nop(); |
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|
4449 |
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|
4450 // Not dirty. |
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|
4451 masm.bind(not_already_dirty); |
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|
4452 // First, dirty it. |
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4453 masm.stb(G0, O3, G0); // [cardPtr] := 0 (i.e., dirty). |
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|
4454 int dirty_card_q_index_byte_offset = |
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|
4455 in_bytes(JavaThread::dirty_card_queue_offset() + |
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|
4456 PtrQueue::byte_offset_of_index()); |
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|
4457 int dirty_card_q_buf_byte_offset = |
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|
4458 in_bytes(JavaThread::dirty_card_queue_offset() + |
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|
4459 PtrQueue::byte_offset_of_buf()); |
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|
4460 masm.bind(restart); |
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|
4461 masm.ld_ptr(G2_thread, dirty_card_q_index_byte_offset, L0); |
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|
4462 |
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4463 masm.br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pn, |
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|
4464 L0, refill); |
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|
4465 // If the branch is taken, no harm in executing this in the delay slot. |
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4466 masm.delayed()->ld_ptr(G2_thread, dirty_card_q_buf_byte_offset, L1); |
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4467 masm.sub(L0, oopSize, L0); |
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|
4468 |
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|
4469 masm.st_ptr(O3, L1, L0); // [_buf + index] := I0 |
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|
4470 // Use return-from-leaf |
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|
4471 masm.retl(); |
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4472 masm.delayed()->st_ptr(L0, G2_thread, dirty_card_q_index_byte_offset); |
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|
4473 |
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|
4474 masm.bind(refill); |
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|
4475 address handle_zero = |
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|
4476 CAST_FROM_FN_PTR(address, |
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|
4477 &DirtyCardQueueSet::handle_zero_index_for_thread); |
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|
4478 // This should be rare enough that we can afford to save all the |
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|
4479 // scratch registers that the calling context might be using. |
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|
4480 masm.mov(G1_scratch, L3); |
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|
4481 masm.mov(G3_scratch, L5); |
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|
4482 // We need the value of O3 above (for the write into the buffer), so we |
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|
4483 // save and restore it. |
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|
4484 masm.mov(O3, L6); |
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|
4485 // Since the call will overwrite O7, we save and restore that, as well. |
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|
4486 masm.mov(O7, L4); |
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|
4487 |
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4488 masm.call_VM_leaf(L7_thread_cache, handle_zero, G2_thread); |
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|
4489 masm.mov(L3, G1_scratch); |
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|
4490 masm.mov(L5, G3_scratch); |
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|
4491 masm.mov(L6, O3); |
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4492 masm.br(Assembler::always, /*annul*/false, Assembler::pt, restart); |
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|
4493 masm.delayed()->mov(L4, O7); |
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|
4494 |
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|
4495 dirty_card_log_enqueue = start; |
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|
4496 dirty_card_log_enqueue_end = masm.pc(); |
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4497 // XXX Should have a guarantee here about not going off the end! |
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4498 // Does it already do so? Do an experiment... |
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4499 } |
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4500 |
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4501 static inline void |
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4502 generate_dirty_card_log_enqueue_if_necessary(jbyte* byte_map_base) { |
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4503 if (dirty_card_log_enqueue == 0) { |
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4504 generate_dirty_card_log_enqueue(byte_map_base); |
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4505 assert(dirty_card_log_enqueue != 0, "postcondition."); |
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4506 if (G1SATBPrintStubs) { |
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4507 tty->print_cr("Generated dirty_card enqueue:"); |
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4508 Disassembler::decode((u_char*)dirty_card_log_enqueue, |
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4509 dirty_card_log_enqueue_end, |
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4510 tty); |
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4511 } |
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4512 } |
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4513 } |
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4514 |
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4515 |
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4516 void MacroAssembler::g1_write_barrier_post(Register store_addr, Register new_val, Register tmp) { |
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4517 |
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4518 Label filtered; |
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4519 MacroAssembler* post_filter_masm = this; |
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4520 |
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4521 if (new_val == G0) return; |
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4522 if (G1DisablePostBarrier) return; |
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4523 |
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4524 G1SATBCardTableModRefBS* bs = (G1SATBCardTableModRefBS*) Universe::heap()->barrier_set(); |
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4525 assert(bs->kind() == BarrierSet::G1SATBCT || |
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4526 bs->kind() == BarrierSet::G1SATBCTLogging, "wrong barrier"); |
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4527 if (G1RSBarrierRegionFilter) { |
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4528 xor3(store_addr, new_val, tmp); |
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4529 #ifdef _LP64 |
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4530 srlx(tmp, HeapRegion::LogOfHRGrainBytes, tmp); |
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4531 #else |
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4532 srl(tmp, HeapRegion::LogOfHRGrainBytes, tmp); |
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4533 #endif |
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4534 if (G1PrintCTFilterStats) { |
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4535 guarantee(tmp->is_global(), "Or stats won't work..."); |
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4536 // This is a sleazy hack: I'm temporarily hijacking G2, which I |
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4537 // promise to restore. |
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4538 mov(new_val, G2); |
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|
4539 save_frame(0); |
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4540 mov(tmp, O0); |
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|
4541 mov(G2, O1); |
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|
4542 // Save G-regs that target may use. |
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4543 mov(G1, L1); |
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4544 mov(G2, L2); |
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4545 mov(G3, L3); |
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4546 mov(G4, L4); |
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|
4547 mov(G5, L5); |
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4548 call(CAST_FROM_FN_PTR(address, &count_ct_writes)); |
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4549 delayed()->nop(); |
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|
4550 mov(O0, G2); |
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|
4551 // Restore G-regs that target may have used. |
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|
4552 mov(L1, G1); |
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|
4553 mov(L3, G3); |
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|
4554 mov(L4, G4); |
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|
4555 mov(L5, G5); |
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|
4556 restore(G0, G0, G0); |
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|
4557 } |
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4558 // XXX Should I predict this taken or not? Does it mattern? |
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4559 br_on_reg_cond(rc_z, /*annul*/false, Assembler::pt, tmp, filtered); |
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|
4560 delayed()->nop(); |
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|
4561 } |
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4562 |
794 | 4563 // If the "store_addr" register is an "in" or "local" register, move it to |
4564 // a scratch reg so we can pass it as an argument. | |
4565 bool use_scr = !(store_addr->is_global() || store_addr->is_out()); | |
4566 // Pick a scratch register different from "tmp". | |
4567 Register scr = (tmp == G1_scratch ? G3_scratch : G1_scratch); | |
4568 // Make sure we use up the delay slot! | |
4569 if (use_scr) { | |
4570 post_filter_masm->mov(store_addr, scr); | |
342
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4571 } else { |
794 | 4572 post_filter_masm->nop(); |
342
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4573 } |
794 | 4574 generate_dirty_card_log_enqueue_if_necessary(bs->byte_map_base); |
4575 save_frame(0); | |
4576 call(dirty_card_log_enqueue); | |
4577 if (use_scr) { | |
4578 delayed()->mov(scr, O0); | |
4579 } else { | |
4580 delayed()->mov(store_addr->after_save(), O0); | |
4581 } | |
4582 restore(); | |
342
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|
4583 |
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|
4584 bind(filtered); |
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|
4585 |
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|
4586 } |
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|
4587 |
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4588 #endif // SERIALGC |
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|
4589 /////////////////////////////////////////////////////////////////////////////////// |
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4590 |
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4591 void MacroAssembler::card_write_barrier_post(Register store_addr, Register new_val, Register tmp) { |
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4592 // If we're writing constant NULL, we can skip the write barrier. |
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4593 if (new_val == G0) return; |
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|
4594 CardTableModRefBS* bs = (CardTableModRefBS*) Universe::heap()->barrier_set(); |
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4595 assert(bs->kind() == BarrierSet::CardTableModRef || |
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4596 bs->kind() == BarrierSet::CardTableExtension, "wrong barrier"); |
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4597 card_table_write(bs->byte_map_base, tmp, store_addr); |
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4598 } |
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4599 |
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4600 void MacroAssembler::load_klass(Register src_oop, Register klass) { |
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4601 // The number of bytes in this code is used by |
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4602 // MachCallDynamicJavaNode::ret_addr_offset() |
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4603 // if this changes, change that. |
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4604 if (UseCompressedOops) { |
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4605 lduw(src_oop, oopDesc::klass_offset_in_bytes(), klass); |
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4606 decode_heap_oop_not_null(klass); |
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4607 } else { |
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4608 ld_ptr(src_oop, oopDesc::klass_offset_in_bytes(), klass); |
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4609 } |
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4610 } |
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4611 |
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4612 void MacroAssembler::store_klass(Register klass, Register dst_oop) { |
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4613 if (UseCompressedOops) { |
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4614 assert(dst_oop != klass, "not enough registers"); |
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4615 encode_heap_oop_not_null(klass); |
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4616 st(klass, dst_oop, oopDesc::klass_offset_in_bytes()); |
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4617 } else { |
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4618 st_ptr(klass, dst_oop, oopDesc::klass_offset_in_bytes()); |
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4619 } |
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4620 } |
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4621 |
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4622 void MacroAssembler::store_klass_gap(Register s, Register d) { |
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4623 if (UseCompressedOops) { |
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4624 assert(s != d, "not enough registers"); |
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4625 st(s, d, oopDesc::klass_gap_offset_in_bytes()); |
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4626 } |
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4627 } |
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4628 |
727 | 4629 void MacroAssembler::load_heap_oop(const Address& s, Register d) { |
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4630 if (UseCompressedOops) { |
727 | 4631 lduw(s, d); |
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4632 decode_heap_oop(d); |
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4633 } else { |
727 | 4634 ld_ptr(s, d); |
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4635 } |
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4636 } |
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4637 |
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4638 void MacroAssembler::load_heap_oop(Register s1, Register s2, Register d) { |
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4639 if (UseCompressedOops) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4640 lduw(s1, s2, d); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4641 decode_heap_oop(d, d); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4642 } else { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4643 ld_ptr(s1, s2, d); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4644 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4645 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4646 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4647 void MacroAssembler::load_heap_oop(Register s1, int simm13a, Register d) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4648 if (UseCompressedOops) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4649 lduw(s1, simm13a, d); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4650 decode_heap_oop(d, d); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4651 } else { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4652 ld_ptr(s1, simm13a, d); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4653 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4654 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4655 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4656 void MacroAssembler::store_heap_oop(Register d, Register s1, Register s2) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4657 if (UseCompressedOops) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4658 assert(s1 != d && s2 != d, "not enough registers"); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4659 encode_heap_oop(d); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4660 st(d, s1, s2); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4661 } else { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4662 st_ptr(d, s1, s2); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4663 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4664 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4665 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4666 void MacroAssembler::store_heap_oop(Register d, Register s1, int simm13a) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4667 if (UseCompressedOops) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4668 assert(s1 != d, "not enough registers"); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4669 encode_heap_oop(d); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4670 st(d, s1, simm13a); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4671 } else { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4672 st_ptr(d, s1, simm13a); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4673 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4674 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4675 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4676 void MacroAssembler::store_heap_oop(Register d, const Address& a, int offset) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4677 if (UseCompressedOops) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4678 assert(a.base() != d, "not enough registers"); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4679 encode_heap_oop(d); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4680 st(d, a, offset); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4681 } else { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4682 st_ptr(d, a, offset); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4683 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4684 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4685 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4686 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4687 void MacroAssembler::encode_heap_oop(Register src, Register dst) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4688 assert (UseCompressedOops, "must be compressed"); |
642
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4689 assert (Universe::heap() != NULL, "java heap should be initialized"); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4690 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); |
178
6d172e3548cb
6695819: verify_oopx rax: broken oop in decode_heap_oop
coleenp
parents:
124
diff
changeset
|
4691 verify_oop(src); |
642
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4692 if (Universe::narrow_oop_base() == NULL) { |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4693 srlx(src, LogMinObjAlignmentInBytes, dst); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4694 return; |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4695 } |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4696 Label done; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4697 if (src == dst) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4698 // optimize for frequent case src == dst |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4699 bpr(rc_nz, true, Assembler::pt, src, done); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4700 delayed() -> sub(src, G6_heapbase, dst); // annuled if not taken |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4701 bind(done); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4702 srlx(src, LogMinObjAlignmentInBytes, dst); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4703 } else { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4704 bpr(rc_z, false, Assembler::pn, src, done); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4705 delayed() -> mov(G0, dst); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4706 // could be moved before branch, and annulate delay, |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4707 // but may add some unneeded work decoding null |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4708 sub(src, G6_heapbase, dst); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4709 srlx(dst, LogMinObjAlignmentInBytes, dst); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4710 bind(done); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4711 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4712 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4713 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4714 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4715 void MacroAssembler::encode_heap_oop_not_null(Register r) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4716 assert (UseCompressedOops, "must be compressed"); |
642
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4717 assert (Universe::heap() != NULL, "java heap should be initialized"); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4718 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); |
178
6d172e3548cb
6695819: verify_oopx rax: broken oop in decode_heap_oop
coleenp
parents:
124
diff
changeset
|
4719 verify_oop(r); |
642
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4720 if (Universe::narrow_oop_base() != NULL) |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4721 sub(r, G6_heapbase, r); |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4722 srlx(r, LogMinObjAlignmentInBytes, r); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4723 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4724 |
124
b130b98db9cf
6689060: Escape Analysis does not work with Compressed Oops
kvn
parents:
113
diff
changeset
|
4725 void MacroAssembler::encode_heap_oop_not_null(Register src, Register dst) { |
b130b98db9cf
6689060: Escape Analysis does not work with Compressed Oops
kvn
parents:
113
diff
changeset
|
4726 assert (UseCompressedOops, "must be compressed"); |
642
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4727 assert (Universe::heap() != NULL, "java heap should be initialized"); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4728 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); |
178
6d172e3548cb
6695819: verify_oopx rax: broken oop in decode_heap_oop
coleenp
parents:
124
diff
changeset
|
4729 verify_oop(src); |
642
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4730 if (Universe::narrow_oop_base() == NULL) { |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4731 srlx(src, LogMinObjAlignmentInBytes, dst); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4732 } else { |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4733 sub(src, G6_heapbase, dst); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4734 srlx(dst, LogMinObjAlignmentInBytes, dst); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4735 } |
124
b130b98db9cf
6689060: Escape Analysis does not work with Compressed Oops
kvn
parents:
113
diff
changeset
|
4736 } |
b130b98db9cf
6689060: Escape Analysis does not work with Compressed Oops
kvn
parents:
113
diff
changeset
|
4737 |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4738 // Same algorithm as oops.inline.hpp decode_heap_oop. |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4739 void MacroAssembler::decode_heap_oop(Register src, Register dst) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4740 assert (UseCompressedOops, "must be compressed"); |
642
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4741 assert (Universe::heap() != NULL, "java heap should be initialized"); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4742 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4743 sllx(src, LogMinObjAlignmentInBytes, dst); |
642
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4744 if (Universe::narrow_oop_base() != NULL) { |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4745 Label done; |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4746 bpr(rc_nz, true, Assembler::pt, dst, done); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4747 delayed() -> add(dst, G6_heapbase, dst); // annuled if not taken |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4748 bind(done); |
660978a2a31a
6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents:
623
diff
changeset
|
4749 } |
178
6d172e3548cb
6695819: verify_oopx rax: broken oop in decode_heap_oop
coleenp
parents:
124
diff
changeset
|
4750 verify_oop(dst); |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4751 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4752 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4753 void MacroAssembler::decode_heap_oop_not_null(Register r) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4754 // Do not add assert code to this unless you change vtableStubs_sparc.cpp |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
4755 // pd_code_size_limit. |
178
6d172e3548cb
6695819: verify_oopx rax: broken oop in decode_heap_oop
coleenp
parents:
124
diff
changeset
|
4756 // Also do not verify_oop as this is called by verify_oop. |
113
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4757 assert (UseCompressedOops, "must be compressed"); |
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4758 assert (Universe::heap() != NULL, "java heap should be initialized"); |
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4759 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); |
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4760 sllx(r, LogMinObjAlignmentInBytes, r); |
642
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4761 if (Universe::narrow_oop_base() != NULL) |
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4762 add(r, G6_heapbase, r); |
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4763 } |
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4764 |
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4765 void MacroAssembler::decode_heap_oop_not_null(Register src, Register dst) { |
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4766 // Do not add assert code to this unless you change vtableStubs_sparc.cpp |
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4767 // pd_code_size_limit. |
178
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4768 // Also do not verify_oop as this is called by verify_oop. |
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4769 assert (UseCompressedOops, "must be compressed"); |
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4770 assert (Universe::heap() != NULL, "java heap should be initialized"); |
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4771 assert (LogMinObjAlignmentInBytes == Universe::narrow_oop_shift(), "decode alg wrong"); |
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4772 sllx(src, LogMinObjAlignmentInBytes, dst); |
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4773 if (Universe::narrow_oop_base() != NULL) |
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4774 add(dst, G6_heapbase, dst); |
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4775 } |
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4776 |
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4777 void MacroAssembler::reinit_heapbase() { |
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4778 if (UseCompressedOops) { |
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4779 // call indirectly to solve generation ordering problem |
727 | 4780 AddressLiteral base(Universe::narrow_oop_base_addr()); |
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4781 load_ptr_contents(base, G6_heapbase); |
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4782 } |
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4783 } |
986
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|
4784 |
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4785 // Compare char[] arrays aligned to 4 bytes. |
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4786 void MacroAssembler::char_arrays_equals(Register ary1, Register ary2, |
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4787 Register limit, Register result, |
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|
4788 Register chr1, Register chr2, Label& Ldone) { |
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|
4789 Label Lvector, Lloop; |
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|
4790 assert(chr1 == result, "should be the same"); |
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|
4791 |
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4792 // Note: limit contains number of bytes (2*char_elements) != 0. |
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4793 andcc(limit, 0x2, chr1); // trailing character ? |
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4794 br(Assembler::zero, false, Assembler::pt, Lvector); |
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|
4795 delayed()->nop(); |
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|
4796 |
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|
4797 // compare the trailing char |
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|
4798 sub(limit, sizeof(jchar), limit); |
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|
4799 lduh(ary1, limit, chr1); |
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|
4800 lduh(ary2, limit, chr2); |
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|
4801 cmp(chr1, chr2); |
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4802 br(Assembler::notEqual, true, Assembler::pt, Ldone); |
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|
4803 delayed()->mov(G0, result); // not equal |
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|
4804 |
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|
4805 // only one char ? |
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|
4806 br_on_reg_cond(rc_z, true, Assembler::pn, limit, Ldone); |
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4807 delayed()->add(G0, 1, result); // zero-length arrays are equal |
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|
4808 |
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|
4809 // word by word compare, dont't need alignment check |
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|
4810 bind(Lvector); |
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|
4811 // Shift ary1 and ary2 to the end of the arrays, negate limit |
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|
4812 add(ary1, limit, ary1); |
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|
4813 add(ary2, limit, ary2); |
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|
4814 neg(limit, limit); |
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|
4815 |
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|
4816 lduw(ary1, limit, chr1); |
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|
4817 bind(Lloop); |
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|
4818 lduw(ary2, limit, chr2); |
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|
4819 cmp(chr1, chr2); |
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|
4820 br(Assembler::notEqual, true, Assembler::pt, Ldone); |
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|
4821 delayed()->mov(G0, result); // not equal |
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|
4822 inccc(limit, 2*sizeof(jchar)); |
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|
4823 // annul LDUW if branch is not taken to prevent access past end of array |
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|
4824 br(Assembler::notZero, true, Assembler::pt, Lloop); |
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|
4825 delayed()->lduw(ary1, limit, chr1); // hoisted |
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|
4826 |
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|
4827 // Caller should set it: |
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|
4828 // add(G0, 1, result); // equals |
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|
4829 } |
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|
4830 |