Mercurial > hg > truffle
annotate src/cpu/sparc/vm/c1_MacroAssembler_sparc.cpp @ 2480:4b95bbb36464
7035870: JSR 292: Zero support
Summary: This adds support for JSR 292 to Zero.
Reviewed-by: twisti
Contributed-by: Gary Benson <gbenson@redhat.com>
author | twisti |
---|---|
date | Tue, 12 Apr 2011 02:40:23 -0700 |
parents | 6c97c830fb6f |
children | 3d42f82cd811 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2011, 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 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "c1/c1_MacroAssembler.hpp" | |
27 #include "c1/c1_Runtime1.hpp" | |
28 #include "classfile/systemDictionary.hpp" | |
29 #include "gc_interface/collectedHeap.hpp" | |
30 #include "interpreter/interpreter.hpp" | |
31 #include "oops/arrayOop.hpp" | |
32 #include "oops/markOop.hpp" | |
33 #include "runtime/basicLock.hpp" | |
34 #include "runtime/biasedLocking.hpp" | |
35 #include "runtime/os.hpp" | |
36 #include "runtime/stubRoutines.hpp" | |
0 | 37 |
38 void C1_MacroAssembler::inline_cache_check(Register receiver, Register iCache) { | |
39 Label L; | |
40 const Register temp_reg = G3_scratch; | |
41 // Note: needs more testing of out-of-line vs. inline slow case | |
42 verify_oop(receiver); | |
2002 | 43 load_klass(receiver, temp_reg); |
0 | 44 cmp(temp_reg, iCache); |
45 brx(Assembler::equal, true, Assembler::pt, L); | |
46 delayed()->nop(); | |
727 | 47 AddressLiteral ic_miss(SharedRuntime::get_ic_miss_stub()); |
48 jump_to(ic_miss, temp_reg); | |
0 | 49 delayed()->nop(); |
50 align(CodeEntryAlignment); | |
51 bind(L); | |
52 } | |
53 | |
54 | |
55 void C1_MacroAssembler::explicit_null_check(Register base) { | |
56 Unimplemented(); | |
57 } | |
58 | |
59 | |
60 void C1_MacroAssembler::build_frame(int frame_size_in_bytes) { | |
61 | |
62 generate_stack_overflow_check(frame_size_in_bytes); | |
63 // Create the frame. | |
64 save_frame_c1(frame_size_in_bytes); | |
65 } | |
66 | |
67 | |
68 void C1_MacroAssembler::unverified_entry(Register receiver, Register ic_klass) { | |
69 if (C1Breakpoint) breakpoint_trap(); | |
70 inline_cache_check(receiver, ic_klass); | |
71 } | |
72 | |
73 | |
74 void C1_MacroAssembler::verified_entry() { | |
75 if (C1Breakpoint) breakpoint_trap(); | |
76 // build frame | |
77 verify_FPU(0, "method_entry"); | |
78 } | |
79 | |
80 | |
81 void C1_MacroAssembler::lock_object(Register Rmark, Register Roop, Register Rbox, Register Rscratch, Label& slow_case) { | |
82 assert_different_registers(Rmark, Roop, Rbox, Rscratch); | |
83 | |
84 Label done; | |
85 | |
727 | 86 Address mark_addr(Roop, oopDesc::mark_offset_in_bytes()); |
0 | 87 |
88 // The following move must be the first instruction of emitted since debug | |
89 // information may be generated for it. | |
90 // Load object header | |
91 ld_ptr(mark_addr, Rmark); | |
92 | |
93 verify_oop(Roop); | |
94 | |
95 // save object being locked into the BasicObjectLock | |
96 st_ptr(Roop, Rbox, BasicObjectLock::obj_offset_in_bytes()); | |
97 | |
98 if (UseBiasedLocking) { | |
99 biased_locking_enter(Roop, Rmark, Rscratch, done, &slow_case); | |
100 } | |
101 | |
102 // Save Rbox in Rscratch to be used for the cas operation | |
103 mov(Rbox, Rscratch); | |
104 | |
105 // and mark it unlocked | |
106 or3(Rmark, markOopDesc::unlocked_value, Rmark); | |
107 | |
108 // save unlocked object header into the displaced header location on the stack | |
109 st_ptr(Rmark, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
110 | |
111 // compare object markOop with Rmark and if equal exchange Rscratch with object markOop | |
112 assert(mark_addr.disp() == 0, "cas must take a zero displacement"); | |
113 casx_under_lock(mark_addr.base(), Rmark, Rscratch, (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr()); | |
114 // if compare/exchange succeeded we found an unlocked object and we now have locked it | |
115 // hence we are done | |
116 cmp(Rmark, Rscratch); | |
117 brx(Assembler::equal, false, Assembler::pt, done); | |
118 delayed()->sub(Rscratch, SP, Rscratch); //pull next instruction into delay slot | |
119 // we did not find an unlocked object so see if this is a recursive case | |
120 // sub(Rscratch, SP, Rscratch); | |
121 assert(os::vm_page_size() > 0xfff, "page size too small - change the constant"); | |
122 andcc(Rscratch, 0xfffff003, Rscratch); | |
123 brx(Assembler::notZero, false, Assembler::pn, slow_case); | |
124 delayed()->st_ptr(Rscratch, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
125 bind(done); | |
126 } | |
127 | |
128 | |
129 void C1_MacroAssembler::unlock_object(Register Rmark, Register Roop, Register Rbox, Label& slow_case) { | |
130 assert_different_registers(Rmark, Roop, Rbox); | |
131 | |
132 Label done; | |
133 | |
727 | 134 Address mark_addr(Roop, oopDesc::mark_offset_in_bytes()); |
0 | 135 assert(mark_addr.disp() == 0, "cas must take a zero displacement"); |
136 | |
137 if (UseBiasedLocking) { | |
138 // load the object out of the BasicObjectLock | |
139 ld_ptr(Rbox, BasicObjectLock::obj_offset_in_bytes(), Roop); | |
140 verify_oop(Roop); | |
141 biased_locking_exit(mark_addr, Rmark, done); | |
142 } | |
143 // Test first it it is a fast recursive unlock | |
144 ld_ptr(Rbox, BasicLock::displaced_header_offset_in_bytes(), Rmark); | |
145 br_null(Rmark, false, Assembler::pt, done); | |
146 delayed()->nop(); | |
147 if (!UseBiasedLocking) { | |
148 // load object | |
149 ld_ptr(Rbox, BasicObjectLock::obj_offset_in_bytes(), Roop); | |
150 verify_oop(Roop); | |
151 } | |
152 | |
153 // Check if it is still a light weight lock, this is is true if we see | |
154 // the stack address of the basicLock in the markOop of the object | |
155 casx_under_lock(mark_addr.base(), Rbox, Rmark, (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr()); | |
156 cmp(Rbox, Rmark); | |
157 | |
158 brx(Assembler::notEqual, false, Assembler::pn, slow_case); | |
159 delayed()->nop(); | |
160 // Done | |
161 bind(done); | |
162 } | |
163 | |
164 | |
165 void C1_MacroAssembler::try_allocate( | |
166 Register obj, // result: pointer to object after successful allocation | |
167 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise | |
168 int con_size_in_bytes, // object size in bytes if known at compile time | |
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169 Register t1, // temp register, must be global register for incr_allocated_bytes |
0 | 170 Register t2, // temp register |
171 Label& slow_case // continuation point if fast allocation fails | |
172 ) { | |
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173 RegisterOrConstant size_in_bytes = var_size_in_bytes->is_valid() |
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174 ? RegisterOrConstant(var_size_in_bytes) : RegisterOrConstant(con_size_in_bytes); |
0 | 175 if (UseTLAB) { |
176 tlab_allocate(obj, var_size_in_bytes, con_size_in_bytes, t1, slow_case); | |
177 } else { | |
178 eden_allocate(obj, var_size_in_bytes, con_size_in_bytes, t1, t2, slow_case); | |
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179 incr_allocated_bytes(size_in_bytes, t1, t2); |
0 | 180 } |
181 } | |
182 | |
183 | |
184 void C1_MacroAssembler::initialize_header(Register obj, Register klass, Register len, Register t1, Register t2) { | |
185 assert_different_registers(obj, klass, len, t1, t2); | |
186 if (UseBiasedLocking && !len->is_valid()) { | |
187 ld_ptr(klass, Klass::prototype_header_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes(), t1); | |
188 } else { | |
189 set((intx)markOopDesc::prototype(), t1); | |
190 } | |
2002 | 191 st_ptr(t1, obj, oopDesc::mark_offset_in_bytes()); |
192 if (UseCompressedOops) { | |
193 // Save klass | |
194 mov(klass, t1); | |
195 encode_heap_oop_not_null(t1); | |
196 stw(t1, obj, oopDesc::klass_offset_in_bytes()); | |
197 } else { | |
198 st_ptr(klass, obj, oopDesc::klass_offset_in_bytes()); | |
199 } | |
200 if (len->is_valid()) st(len, obj, arrayOopDesc::length_offset_in_bytes()); | |
201 else if (UseCompressedOops) { | |
202 store_klass_gap(G0, obj); | |
203 } | |
0 | 204 } |
205 | |
206 | |
207 void C1_MacroAssembler::initialize_body(Register base, Register index) { | |
208 assert_different_registers(base, index); | |
209 Label loop; | |
210 bind(loop); | |
211 subcc(index, HeapWordSize, index); | |
212 brx(Assembler::greaterEqual, true, Assembler::pt, loop); | |
213 delayed()->st_ptr(G0, base, index); | |
214 } | |
215 | |
216 | |
217 void C1_MacroAssembler::allocate_object( | |
218 Register obj, // result: pointer to object after successful allocation | |
219 Register t1, // temp register | |
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220 Register t2, // temp register, must be a global register for try_allocate |
0 | 221 Register t3, // temp register |
222 int hdr_size, // object header size in words | |
223 int obj_size, // object size in words | |
224 Register klass, // object klass | |
225 Label& slow_case // continuation point if fast allocation fails | |
226 ) { | |
227 assert_different_registers(obj, t1, t2, t3, klass); | |
228 assert(klass == G5, "must be G5"); | |
229 | |
230 // allocate space & initialize header | |
231 if (!is_simm13(obj_size * wordSize)) { | |
232 // would need to use extra register to load | |
233 // object size => go the slow case for now | |
234 br(Assembler::always, false, Assembler::pt, slow_case); | |
235 delayed()->nop(); | |
236 return; | |
237 } | |
238 try_allocate(obj, noreg, obj_size * wordSize, t2, t3, slow_case); | |
239 | |
240 initialize_object(obj, klass, noreg, obj_size * HeapWordSize, t1, t2); | |
241 } | |
242 | |
243 void C1_MacroAssembler::initialize_object( | |
244 Register obj, // result: pointer to object after successful allocation | |
245 Register klass, // object klass | |
246 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise | |
247 int con_size_in_bytes, // object size in bytes if known at compile time | |
248 Register t1, // temp register | |
249 Register t2 // temp register | |
250 ) { | |
2002 | 251 const int hdr_size_in_bytes = instanceOopDesc::header_size() * HeapWordSize; |
0 | 252 |
253 initialize_header(obj, klass, noreg, t1, t2); | |
254 | |
255 #ifdef ASSERT | |
256 { | |
257 Label ok; | |
258 ld(klass, klassOopDesc::header_size() * HeapWordSize + Klass::layout_helper_offset_in_bytes(), t1); | |
259 if (var_size_in_bytes != noreg) { | |
260 cmp(t1, var_size_in_bytes); | |
261 } else { | |
262 cmp(t1, con_size_in_bytes); | |
263 } | |
264 brx(Assembler::equal, false, Assembler::pt, ok); | |
265 delayed()->nop(); | |
266 stop("bad size in initialize_object"); | |
267 should_not_reach_here(); | |
268 | |
269 bind(ok); | |
270 } | |
271 | |
272 #endif | |
273 | |
274 // initialize body | |
275 const int threshold = 5 * HeapWordSize; // approximate break even point for code size | |
276 if (var_size_in_bytes != noreg) { | |
277 // use a loop | |
278 add(obj, hdr_size_in_bytes, t1); // compute address of first element | |
279 sub(var_size_in_bytes, hdr_size_in_bytes, t2); // compute size of body | |
280 initialize_body(t1, t2); | |
281 #ifndef _LP64 | |
282 } else if (VM_Version::v9_instructions_work() && con_size_in_bytes < threshold * 2) { | |
283 // on v9 we can do double word stores to fill twice as much space. | |
284 assert(hdr_size_in_bytes % 8 == 0, "double word aligned"); | |
285 assert(con_size_in_bytes % 8 == 0, "double word aligned"); | |
286 for (int i = hdr_size_in_bytes; i < con_size_in_bytes; i += 2 * HeapWordSize) stx(G0, obj, i); | |
287 #endif | |
288 } else if (con_size_in_bytes <= threshold) { | |
289 // use explicit NULL stores | |
290 for (int i = hdr_size_in_bytes; i < con_size_in_bytes; i += HeapWordSize) st_ptr(G0, obj, i); | |
291 } else if (con_size_in_bytes > hdr_size_in_bytes) { | |
292 // use a loop | |
293 const Register base = t1; | |
294 const Register index = t2; | |
295 add(obj, hdr_size_in_bytes, base); // compute address of first element | |
296 // compute index = number of words to clear | |
297 set(con_size_in_bytes - hdr_size_in_bytes, index); | |
298 initialize_body(base, index); | |
299 } | |
300 | |
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301 if (CURRENT_ENV->dtrace_alloc_probes()) { |
0 | 302 assert(obj == O0, "must be"); |
303 call(CAST_FROM_FN_PTR(address, Runtime1::entry_for(Runtime1::dtrace_object_alloc_id)), | |
304 relocInfo::runtime_call_type); | |
305 delayed()->nop(); | |
306 } | |
307 | |
308 verify_oop(obj); | |
309 } | |
310 | |
311 | |
312 void C1_MacroAssembler::allocate_array( | |
313 Register obj, // result: pointer to array after successful allocation | |
314 Register len, // array length | |
315 Register t1, // temp register | |
316 Register t2, // temp register | |
317 Register t3, // temp register | |
318 int hdr_size, // object header size in words | |
319 int elt_size, // element size in bytes | |
320 Register klass, // object klass | |
321 Label& slow_case // continuation point if fast allocation fails | |
322 ) { | |
323 assert_different_registers(obj, len, t1, t2, t3, klass); | |
324 assert(klass == G5, "must be G5"); | |
325 assert(t1 == G1, "must be G1"); | |
326 | |
327 // determine alignment mask | |
328 assert(!(BytesPerWord & 1), "must be a multiple of 2 for masking code to work"); | |
329 | |
330 // check for negative or excessive length | |
331 // note: the maximum length allowed is chosen so that arrays of any | |
332 // element size with this length are always smaller or equal | |
333 // to the largest integer (i.e., array size computation will | |
334 // not overflow) | |
335 set(max_array_allocation_length, t1); | |
336 cmp(len, t1); | |
337 br(Assembler::greaterUnsigned, false, Assembler::pn, slow_case); | |
338 | |
339 // compute array size | |
340 // note: if 0 <= len <= max_length, len*elt_size + header + alignment is | |
341 // smaller or equal to the largest integer; also, since top is always | |
342 // aligned, we can do the alignment here instead of at the end address | |
343 // computation | |
344 const Register arr_size = t1; | |
345 switch (elt_size) { | |
346 case 1: delayed()->mov(len, arr_size); break; | |
347 case 2: delayed()->sll(len, 1, arr_size); break; | |
348 case 4: delayed()->sll(len, 2, arr_size); break; | |
349 case 8: delayed()->sll(len, 3, arr_size); break; | |
350 default: ShouldNotReachHere(); | |
351 } | |
352 add(arr_size, hdr_size * wordSize + MinObjAlignmentInBytesMask, arr_size); // add space for header & alignment | |
353 and3(arr_size, ~MinObjAlignmentInBytesMask, arr_size); // align array size | |
354 | |
355 // allocate space & initialize header | |
356 if (UseTLAB) { | |
357 tlab_allocate(obj, arr_size, 0, t2, slow_case); | |
358 } else { | |
359 eden_allocate(obj, arr_size, 0, t2, t3, slow_case); | |
360 } | |
361 initialize_header(obj, klass, len, t2, t3); | |
362 | |
363 // initialize body | |
364 const Register base = t2; | |
365 const Register index = t3; | |
366 add(obj, hdr_size * wordSize, base); // compute address of first element | |
367 sub(arr_size, hdr_size * wordSize, index); // compute index = number of words to clear | |
368 initialize_body(base, index); | |
369 | |
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370 if (CURRENT_ENV->dtrace_alloc_probes()) { |
0 | 371 assert(obj == O0, "must be"); |
372 call(CAST_FROM_FN_PTR(address, Runtime1::entry_for(Runtime1::dtrace_object_alloc_id)), | |
373 relocInfo::runtime_call_type); | |
374 delayed()->nop(); | |
375 } | |
376 | |
377 verify_oop(obj); | |
378 } | |
379 | |
380 | |
381 #ifndef PRODUCT | |
382 | |
383 void C1_MacroAssembler::verify_stack_oop(int stack_offset) { | |
384 if (!VerifyOops) return; | |
727 | 385 verify_oop_addr(Address(SP, stack_offset + STACK_BIAS)); |
0 | 386 } |
387 | |
388 void C1_MacroAssembler::verify_not_null_oop(Register r) { | |
389 Label not_null; | |
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390 br_notnull(r, false, Assembler::pt, not_null); |
0 | 391 delayed()->nop(); |
392 stop("non-null oop required"); | |
393 bind(not_null); | |
394 if (!VerifyOops) return; | |
395 verify_oop(r); | |
396 } | |
397 | |
398 void C1_MacroAssembler::invalidate_registers(bool iregisters, bool lregisters, bool oregisters, | |
399 Register preserve1, Register preserve2) { | |
400 if (iregisters) { | |
401 for (int i = 0; i < 6; i++) { | |
402 Register r = as_iRegister(i); | |
403 if (r != preserve1 && r != preserve2) set(0xdead, r); | |
404 } | |
405 } | |
406 if (oregisters) { | |
407 for (int i = 0; i < 6; i++) { | |
408 Register r = as_oRegister(i); | |
409 if (r != preserve1 && r != preserve2) set(0xdead, r); | |
410 } | |
411 } | |
412 if (lregisters) { | |
413 for (int i = 0; i < 8; i++) { | |
414 Register r = as_lRegister(i); | |
415 if (r != preserve1 && r != preserve2) set(0xdead, r); | |
416 } | |
417 } | |
418 } | |
419 | |
420 | |
421 #endif |