Mercurial > hg > graal-compiler
annotate src/cpu/sparc/vm/c1_MacroAssembler_sparc.cpp @ 1156:136ac23d6ded
Merge
author | jrose |
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date | Fri, 08 Jan 2010 15:17:42 -0800 |
parents | c96bf21b756f |
children | 3cf667df43ef |
rev | line source |
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0 | 1 /* |
727 | 2 * Copyright 1999-2009 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_c1_MacroAssembler_sparc.cpp.incl" | |
27 | |
28 void C1_MacroAssembler::inline_cache_check(Register receiver, Register iCache) { | |
29 Label L; | |
30 const Register temp_reg = G3_scratch; | |
31 // Note: needs more testing of out-of-line vs. inline slow case | |
32 verify_oop(receiver); | |
33 ld_ptr(receiver, oopDesc::klass_offset_in_bytes(), temp_reg); | |
34 cmp(temp_reg, iCache); | |
35 brx(Assembler::equal, true, Assembler::pt, L); | |
36 delayed()->nop(); | |
727 | 37 AddressLiteral ic_miss(SharedRuntime::get_ic_miss_stub()); |
38 jump_to(ic_miss, temp_reg); | |
0 | 39 delayed()->nop(); |
40 align(CodeEntryAlignment); | |
41 bind(L); | |
42 } | |
43 | |
44 | |
45 void C1_MacroAssembler::method_exit(bool restore_frame) { | |
46 // this code must be structured this way so that the return | |
47 // instruction can be a safepoint. | |
48 if (restore_frame) { | |
49 restore(); | |
50 } | |
51 retl(); | |
52 delayed()->nop(); | |
53 } | |
54 | |
55 | |
56 void C1_MacroAssembler::explicit_null_check(Register base) { | |
57 Unimplemented(); | |
58 } | |
59 | |
60 | |
61 void C1_MacroAssembler::build_frame(int frame_size_in_bytes) { | |
62 | |
63 generate_stack_overflow_check(frame_size_in_bytes); | |
64 // Create the frame. | |
65 save_frame_c1(frame_size_in_bytes); | |
66 } | |
67 | |
68 | |
69 void C1_MacroAssembler::unverified_entry(Register receiver, Register ic_klass) { | |
70 if (C1Breakpoint) breakpoint_trap(); | |
71 inline_cache_check(receiver, ic_klass); | |
72 } | |
73 | |
74 | |
75 void C1_MacroAssembler::verified_entry() { | |
76 if (C1Breakpoint) breakpoint_trap(); | |
77 // build frame | |
78 verify_FPU(0, "method_entry"); | |
79 } | |
80 | |
81 | |
82 void C1_MacroAssembler::lock_object(Register Rmark, Register Roop, Register Rbox, Register Rscratch, Label& slow_case) { | |
83 assert_different_registers(Rmark, Roop, Rbox, Rscratch); | |
84 | |
85 Label done; | |
86 | |
727 | 87 Address mark_addr(Roop, oopDesc::mark_offset_in_bytes()); |
0 | 88 |
89 // The following move must be the first instruction of emitted since debug | |
90 // information may be generated for it. | |
91 // Load object header | |
92 ld_ptr(mark_addr, Rmark); | |
93 | |
94 verify_oop(Roop); | |
95 | |
96 // save object being locked into the BasicObjectLock | |
97 st_ptr(Roop, Rbox, BasicObjectLock::obj_offset_in_bytes()); | |
98 | |
99 if (UseBiasedLocking) { | |
100 biased_locking_enter(Roop, Rmark, Rscratch, done, &slow_case); | |
101 } | |
102 | |
103 // Save Rbox in Rscratch to be used for the cas operation | |
104 mov(Rbox, Rscratch); | |
105 | |
106 // and mark it unlocked | |
107 or3(Rmark, markOopDesc::unlocked_value, Rmark); | |
108 | |
109 // save unlocked object header into the displaced header location on the stack | |
110 st_ptr(Rmark, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
111 | |
112 // compare object markOop with Rmark and if equal exchange Rscratch with object markOop | |
113 assert(mark_addr.disp() == 0, "cas must take a zero displacement"); | |
114 casx_under_lock(mark_addr.base(), Rmark, Rscratch, (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr()); | |
115 // if compare/exchange succeeded we found an unlocked object and we now have locked it | |
116 // hence we are done | |
117 cmp(Rmark, Rscratch); | |
118 brx(Assembler::equal, false, Assembler::pt, done); | |
119 delayed()->sub(Rscratch, SP, Rscratch); //pull next instruction into delay slot | |
120 // we did not find an unlocked object so see if this is a recursive case | |
121 // sub(Rscratch, SP, Rscratch); | |
122 assert(os::vm_page_size() > 0xfff, "page size too small - change the constant"); | |
123 andcc(Rscratch, 0xfffff003, Rscratch); | |
124 brx(Assembler::notZero, false, Assembler::pn, slow_case); | |
125 delayed()->st_ptr(Rscratch, Rbox, BasicLock::displaced_header_offset_in_bytes()); | |
126 bind(done); | |
127 } | |
128 | |
129 | |
130 void C1_MacroAssembler::unlock_object(Register Rmark, Register Roop, Register Rbox, Label& slow_case) { | |
131 assert_different_registers(Rmark, Roop, Rbox); | |
132 | |
133 Label done; | |
134 | |
727 | 135 Address mark_addr(Roop, oopDesc::mark_offset_in_bytes()); |
0 | 136 assert(mark_addr.disp() == 0, "cas must take a zero displacement"); |
137 | |
138 if (UseBiasedLocking) { | |
139 // load the object out of the BasicObjectLock | |
140 ld_ptr(Rbox, BasicObjectLock::obj_offset_in_bytes(), Roop); | |
141 verify_oop(Roop); | |
142 biased_locking_exit(mark_addr, Rmark, done); | |
143 } | |
144 // Test first it it is a fast recursive unlock | |
145 ld_ptr(Rbox, BasicLock::displaced_header_offset_in_bytes(), Rmark); | |
146 br_null(Rmark, false, Assembler::pt, done); | |
147 delayed()->nop(); | |
148 if (!UseBiasedLocking) { | |
149 // load object | |
150 ld_ptr(Rbox, BasicObjectLock::obj_offset_in_bytes(), Roop); | |
151 verify_oop(Roop); | |
152 } | |
153 | |
154 // Check if it is still a light weight lock, this is is true if we see | |
155 // the stack address of the basicLock in the markOop of the object | |
156 casx_under_lock(mark_addr.base(), Rbox, Rmark, (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr()); | |
157 cmp(Rbox, Rmark); | |
158 | |
159 brx(Assembler::notEqual, false, Assembler::pn, slow_case); | |
160 delayed()->nop(); | |
161 // Done | |
162 bind(done); | |
163 } | |
164 | |
165 | |
166 void C1_MacroAssembler::try_allocate( | |
167 Register obj, // result: pointer to object after successful allocation | |
168 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise | |
169 int con_size_in_bytes, // object size in bytes if known at compile time | |
170 Register t1, // temp register | |
171 Register t2, // temp register | |
172 Label& slow_case // continuation point if fast allocation fails | |
173 ) { | |
174 if (UseTLAB) { | |
175 tlab_allocate(obj, var_size_in_bytes, con_size_in_bytes, t1, slow_case); | |
176 } else { | |
177 eden_allocate(obj, var_size_in_bytes, con_size_in_bytes, t1, t2, slow_case); | |
178 } | |
179 } | |
180 | |
181 | |
182 void C1_MacroAssembler::initialize_header(Register obj, Register klass, Register len, Register t1, Register t2) { | |
183 assert_different_registers(obj, klass, len, t1, t2); | |
184 if (UseBiasedLocking && !len->is_valid()) { | |
185 ld_ptr(klass, Klass::prototype_header_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes(), t1); | |
186 } else { | |
187 set((intx)markOopDesc::prototype(), t1); | |
188 } | |
189 st_ptr(t1 , obj, oopDesc::mark_offset_in_bytes ()); | |
190 st_ptr(klass, obj, oopDesc::klass_offset_in_bytes ()); | |
191 if (len->is_valid()) st(len , obj, arrayOopDesc::length_offset_in_bytes()); | |
192 } | |
193 | |
194 | |
195 void C1_MacroAssembler::initialize_body(Register base, Register index) { | |
196 assert_different_registers(base, index); | |
197 Label loop; | |
198 bind(loop); | |
199 subcc(index, HeapWordSize, index); | |
200 brx(Assembler::greaterEqual, true, Assembler::pt, loop); | |
201 delayed()->st_ptr(G0, base, index); | |
202 } | |
203 | |
204 | |
205 void C1_MacroAssembler::allocate_object( | |
206 Register obj, // result: pointer to object after successful allocation | |
207 Register t1, // temp register | |
208 Register t2, // temp register | |
209 Register t3, // temp register | |
210 int hdr_size, // object header size in words | |
211 int obj_size, // object size in words | |
212 Register klass, // object klass | |
213 Label& slow_case // continuation point if fast allocation fails | |
214 ) { | |
215 assert_different_registers(obj, t1, t2, t3, klass); | |
216 assert(klass == G5, "must be G5"); | |
217 | |
218 // allocate space & initialize header | |
219 if (!is_simm13(obj_size * wordSize)) { | |
220 // would need to use extra register to load | |
221 // object size => go the slow case for now | |
222 br(Assembler::always, false, Assembler::pt, slow_case); | |
223 delayed()->nop(); | |
224 return; | |
225 } | |
226 try_allocate(obj, noreg, obj_size * wordSize, t2, t3, slow_case); | |
227 | |
228 initialize_object(obj, klass, noreg, obj_size * HeapWordSize, t1, t2); | |
229 } | |
230 | |
231 void C1_MacroAssembler::initialize_object( | |
232 Register obj, // result: pointer to object after successful allocation | |
233 Register klass, // object klass | |
234 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise | |
235 int con_size_in_bytes, // object size in bytes if known at compile time | |
236 Register t1, // temp register | |
237 Register t2 // temp register | |
238 ) { | |
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239 const int hdr_size_in_bytes = instanceOopDesc::base_offset_in_bytes(); |
0 | 240 |
241 initialize_header(obj, klass, noreg, t1, t2); | |
242 | |
243 #ifdef ASSERT | |
244 { | |
245 Label ok; | |
246 ld(klass, klassOopDesc::header_size() * HeapWordSize + Klass::layout_helper_offset_in_bytes(), t1); | |
247 if (var_size_in_bytes != noreg) { | |
248 cmp(t1, var_size_in_bytes); | |
249 } else { | |
250 cmp(t1, con_size_in_bytes); | |
251 } | |
252 brx(Assembler::equal, false, Assembler::pt, ok); | |
253 delayed()->nop(); | |
254 stop("bad size in initialize_object"); | |
255 should_not_reach_here(); | |
256 | |
257 bind(ok); | |
258 } | |
259 | |
260 #endif | |
261 | |
262 // initialize body | |
263 const int threshold = 5 * HeapWordSize; // approximate break even point for code size | |
264 if (var_size_in_bytes != noreg) { | |
265 // use a loop | |
266 add(obj, hdr_size_in_bytes, t1); // compute address of first element | |
267 sub(var_size_in_bytes, hdr_size_in_bytes, t2); // compute size of body | |
268 initialize_body(t1, t2); | |
269 #ifndef _LP64 | |
270 } else if (VM_Version::v9_instructions_work() && con_size_in_bytes < threshold * 2) { | |
271 // on v9 we can do double word stores to fill twice as much space. | |
272 assert(hdr_size_in_bytes % 8 == 0, "double word aligned"); | |
273 assert(con_size_in_bytes % 8 == 0, "double word aligned"); | |
274 for (int i = hdr_size_in_bytes; i < con_size_in_bytes; i += 2 * HeapWordSize) stx(G0, obj, i); | |
275 #endif | |
276 } else if (con_size_in_bytes <= threshold) { | |
277 // use explicit NULL stores | |
278 for (int i = hdr_size_in_bytes; i < con_size_in_bytes; i += HeapWordSize) st_ptr(G0, obj, i); | |
279 } else if (con_size_in_bytes > hdr_size_in_bytes) { | |
280 // use a loop | |
281 const Register base = t1; | |
282 const Register index = t2; | |
283 add(obj, hdr_size_in_bytes, base); // compute address of first element | |
284 // compute index = number of words to clear | |
285 set(con_size_in_bytes - hdr_size_in_bytes, index); | |
286 initialize_body(base, index); | |
287 } | |
288 | |
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289 if (CURRENT_ENV->dtrace_alloc_probes()) { |
0 | 290 assert(obj == O0, "must be"); |
291 call(CAST_FROM_FN_PTR(address, Runtime1::entry_for(Runtime1::dtrace_object_alloc_id)), | |
292 relocInfo::runtime_call_type); | |
293 delayed()->nop(); | |
294 } | |
295 | |
296 verify_oop(obj); | |
297 } | |
298 | |
299 | |
300 void C1_MacroAssembler::allocate_array( | |
301 Register obj, // result: pointer to array after successful allocation | |
302 Register len, // array length | |
303 Register t1, // temp register | |
304 Register t2, // temp register | |
305 Register t3, // temp register | |
306 int hdr_size, // object header size in words | |
307 int elt_size, // element size in bytes | |
308 Register klass, // object klass | |
309 Label& slow_case // continuation point if fast allocation fails | |
310 ) { | |
311 assert_different_registers(obj, len, t1, t2, t3, klass); | |
312 assert(klass == G5, "must be G5"); | |
313 assert(t1 == G1, "must be G1"); | |
314 | |
315 // determine alignment mask | |
316 assert(!(BytesPerWord & 1), "must be a multiple of 2 for masking code to work"); | |
317 | |
318 // check for negative or excessive length | |
319 // note: the maximum length allowed is chosen so that arrays of any | |
320 // element size with this length are always smaller or equal | |
321 // to the largest integer (i.e., array size computation will | |
322 // not overflow) | |
323 set(max_array_allocation_length, t1); | |
324 cmp(len, t1); | |
325 br(Assembler::greaterUnsigned, false, Assembler::pn, slow_case); | |
326 | |
327 // compute array size | |
328 // note: if 0 <= len <= max_length, len*elt_size + header + alignment is | |
329 // smaller or equal to the largest integer; also, since top is always | |
330 // aligned, we can do the alignment here instead of at the end address | |
331 // computation | |
332 const Register arr_size = t1; | |
333 switch (elt_size) { | |
334 case 1: delayed()->mov(len, arr_size); break; | |
335 case 2: delayed()->sll(len, 1, arr_size); break; | |
336 case 4: delayed()->sll(len, 2, arr_size); break; | |
337 case 8: delayed()->sll(len, 3, arr_size); break; | |
338 default: ShouldNotReachHere(); | |
339 } | |
340 add(arr_size, hdr_size * wordSize + MinObjAlignmentInBytesMask, arr_size); // add space for header & alignment | |
341 and3(arr_size, ~MinObjAlignmentInBytesMask, arr_size); // align array size | |
342 | |
343 // allocate space & initialize header | |
344 if (UseTLAB) { | |
345 tlab_allocate(obj, arr_size, 0, t2, slow_case); | |
346 } else { | |
347 eden_allocate(obj, arr_size, 0, t2, t3, slow_case); | |
348 } | |
349 initialize_header(obj, klass, len, t2, t3); | |
350 | |
351 // initialize body | |
352 const Register base = t2; | |
353 const Register index = t3; | |
354 add(obj, hdr_size * wordSize, base); // compute address of first element | |
355 sub(arr_size, hdr_size * wordSize, index); // compute index = number of words to clear | |
356 initialize_body(base, index); | |
357 | |
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358 if (CURRENT_ENV->dtrace_alloc_probes()) { |
0 | 359 assert(obj == O0, "must be"); |
360 call(CAST_FROM_FN_PTR(address, Runtime1::entry_for(Runtime1::dtrace_object_alloc_id)), | |
361 relocInfo::runtime_call_type); | |
362 delayed()->nop(); | |
363 } | |
364 | |
365 verify_oop(obj); | |
366 } | |
367 | |
368 | |
369 #ifndef PRODUCT | |
370 | |
371 void C1_MacroAssembler::verify_stack_oop(int stack_offset) { | |
372 if (!VerifyOops) return; | |
727 | 373 verify_oop_addr(Address(SP, stack_offset + STACK_BIAS)); |
0 | 374 } |
375 | |
376 void C1_MacroAssembler::verify_not_null_oop(Register r) { | |
377 Label not_null; | |
378 br_zero(Assembler::notEqual, false, Assembler::pt, r, not_null); | |
379 delayed()->nop(); | |
380 stop("non-null oop required"); | |
381 bind(not_null); | |
382 if (!VerifyOops) return; | |
383 verify_oop(r); | |
384 } | |
385 | |
386 void C1_MacroAssembler::invalidate_registers(bool iregisters, bool lregisters, bool oregisters, | |
387 Register preserve1, Register preserve2) { | |
388 if (iregisters) { | |
389 for (int i = 0; i < 6; i++) { | |
390 Register r = as_iRegister(i); | |
391 if (r != preserve1 && r != preserve2) set(0xdead, r); | |
392 } | |
393 } | |
394 if (oregisters) { | |
395 for (int i = 0; i < 6; i++) { | |
396 Register r = as_oRegister(i); | |
397 if (r != preserve1 && r != preserve2) set(0xdead, r); | |
398 } | |
399 } | |
400 if (lregisters) { | |
401 for (int i = 0; i < 8; i++) { | |
402 Register r = as_lRegister(i); | |
403 if (r != preserve1 && r != preserve2) set(0xdead, r); | |
404 } | |
405 } | |
406 } | |
407 | |
408 | |
409 #endif |