1 #ifdef USE_PRAGMA_IDENT_SRC
2 #pragma ident "@(#)c1_CodeStubs_sparc.cpp 1.79 07/05/17 15:47:54 JVM"
3 #endif
4 /*
5 * Copyright 1999-2007 Sun Microsystems, Inc. All Rights Reserved.
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7 *
8 * This code is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 only, as
10 * published by the Free Software Foundation.
11 *
12 * This code is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * version 2 for more details (a copy is included in the LICENSE file that
16 * accompanied this code).
17 *
18 * You should have received a copy of the GNU General Public License version
19 * 2 along with this work; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21 *
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
24 * have any questions.
25 *
26 */
27
28 #include "incls/_precompiled.incl"
29 #include "incls/_c1_CodeStubs_sparc.cpp.incl"
30
31 #define __ ce->masm()->
32
33 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index,
34 bool throw_index_out_of_bounds_exception)
35 : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception)
36 , _index(index)
37 {
38 _info = new CodeEmitInfo(info);
39 }
40
41
42 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
43 __ bind(_entry);
44
45 if (_index->is_register()) {
46 __ mov(_index->as_register(), G4);
47 } else {
48 __ set(_index->as_jint(), G4);
49 }
50 if (_throw_index_out_of_bounds_exception) {
51 __ call(Runtime1::entry_for(Runtime1::throw_index_exception_id), relocInfo::runtime_call_type);
52 } else {
53 __ call(Runtime1::entry_for(Runtime1::throw_range_check_failed_id), relocInfo::runtime_call_type);
54 }
55 __ delayed()->nop();
56 ce->add_call_info_here(_info);
57 ce->verify_oop_map(_info);
58 #ifdef ASSERT
59 __ should_not_reach_here();
60 #endif
61 }
62
63 #ifdef TIERED
64
65 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
66 __ bind(_entry);
67 __ set(_bci, G4);
68 __ call(Runtime1::entry_for(Runtime1::counter_overflow_id), relocInfo::runtime_call_type);
69 __ delayed()->nop();
70 ce->add_call_info_here(_info);
71 ce->verify_oop_map(_info);
72
73 __ br(Assembler::always, true, Assembler::pt, _continuation);
74 __ delayed()->nop();
75 }
76
77 #endif // TIERED
78
79 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
80 if (_offset != -1) {
81 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
82 }
83 __ bind(_entry);
84 __ call(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type);
85 __ delayed()->nop();
86 ce->add_call_info_here(_info);
87 ce->verify_oop_map(_info);
88 #ifdef ASSERT
89 __ should_not_reach_here();
90 #endif
91 }
92
93
94 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
95 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
96 __ bind(_entry);
97 __ call(Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id),
98 relocInfo::runtime_call_type);
99 __ delayed()->nop();
100 ce->add_call_info_here(_info);
101 ce->verify_oop_map(_info);
102 #ifdef ASSERT
103 __ should_not_reach_here();
104 #endif
105 }
106
107
108 // Implementation of SimpleExceptionStub
109 // Note: %g1 and %g3 are already in use
110 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
111 __ bind(_entry);
112 __ call(Runtime1::entry_for(_stub), relocInfo::runtime_call_type);
113
114 if (_obj->is_valid()) {
115 __ delayed()->mov(_obj->as_register(), G4); // _obj contains the optional argument to the stub
116 } else {
117 __ delayed()->mov(G0, G4);
118 }
119 ce->add_call_info_here(_info);
120 #ifdef ASSERT
121 __ should_not_reach_here();
122 #endif
123 }
124
125
126 // Implementation of ArrayStoreExceptionStub
127
128 ArrayStoreExceptionStub::ArrayStoreExceptionStub(CodeEmitInfo* info):
129 _info(info) {
130 }
131
132
133 void ArrayStoreExceptionStub::emit_code(LIR_Assembler* ce) {
134 __ bind(_entry);
135 __ call(Runtime1::entry_for(Runtime1::throw_array_store_exception_id), relocInfo::runtime_call_type);
136 __ delayed()->nop();
137 ce->add_call_info_here(_info);
138 ce->verify_oop_map(_info);
139 #ifdef ASSERT
140 __ should_not_reach_here();
141 #endif
142 }
143
144
145
146
147 // Implementation of NewInstanceStub
148
149 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
150 _result = result;
151 _klass = klass;
152 _klass_reg = klass_reg;
153 _info = new CodeEmitInfo(info);
154 assert(stub_id == Runtime1::new_instance_id ||
155 stub_id == Runtime1::fast_new_instance_id ||
156 stub_id == Runtime1::fast_new_instance_init_check_id,
157 "need new_instance id");
158 _stub_id = stub_id;
159 }
160
161
162 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
163 __ bind(_entry);
164 __ call(Runtime1::entry_for(_stub_id), relocInfo::runtime_call_type);
165 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
166 ce->add_call_info_here(_info);
167 ce->verify_oop_map(_info);
168 __ br(Assembler::always, false, Assembler::pt, _continuation);
169 __ delayed()->mov_or_nop(O0, _result->as_register());
170 }
171
172
173 // Implementation of NewTypeArrayStub
174 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
175 _klass_reg = klass_reg;
176 _length = length;
177 _result = result;
178 _info = new CodeEmitInfo(info);
179 }
180
181
182 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
183 __ bind(_entry);
184
185 __ mov(_length->as_register(), G4);
186 __ call(Runtime1::entry_for(Runtime1::new_type_array_id), relocInfo::runtime_call_type);
187 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
188 ce->add_call_info_here(_info);
189 ce->verify_oop_map(_info);
190 __ br(Assembler::always, false, Assembler::pt, _continuation);
191 __ delayed()->mov_or_nop(O0, _result->as_register());
192 }
193
194
195 // Implementation of NewObjectArrayStub
196
197 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
198 _klass_reg = klass_reg;
199 _length = length;
200 _result = result;
201 _info = new CodeEmitInfo(info);
202 }
203
204
205 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
206 __ bind(_entry);
207
208 __ mov(_length->as_register(), G4);
209 __ call(Runtime1::entry_for(Runtime1::new_object_array_id), relocInfo::runtime_call_type);
210 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
211 ce->add_call_info_here(_info);
212 ce->verify_oop_map(_info);
213 __ br(Assembler::always, false, Assembler::pt, _continuation);
214 __ delayed()->mov_or_nop(O0, _result->as_register());
215 }
216
217
218 // Implementation of MonitorAccessStubs
219 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
220 : MonitorAccessStub(obj_reg, lock_reg) {
221 _info = new CodeEmitInfo(info);
222 }
223
224
225 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
226 __ bind(_entry);
227 __ mov(_obj_reg->as_register(), G4);
228 if (ce->compilation()->has_fpu_code()) {
229 __ call(Runtime1::entry_for(Runtime1::monitorenter_id), relocInfo::runtime_call_type);
230 } else {
231 __ call(Runtime1::entry_for(Runtime1::monitorenter_nofpu_id), relocInfo::runtime_call_type);
232 }
233 __ delayed()->mov_or_nop(_lock_reg->as_register(), G5);
234 ce->add_call_info_here(_info);
235 ce->verify_oop_map(_info);
236 __ br(Assembler::always, true, Assembler::pt, _continuation);
237 __ delayed()->nop();
238 }
239
240
241 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
242 __ bind(_entry);
243 if (_compute_lock) {
244 ce->monitor_address(_monitor_ix, _lock_reg);
245 }
246 if (ce->compilation()->has_fpu_code()) {
247 __ call(Runtime1::entry_for(Runtime1::monitorexit_id), relocInfo::runtime_call_type);
248 } else {
249 __ call(Runtime1::entry_for(Runtime1::monitorexit_nofpu_id), relocInfo::runtime_call_type);
250 }
251
252 __ delayed()->mov_or_nop(_lock_reg->as_register(), G4);
253 __ br(Assembler::always, true, Assembler::pt, _continuation);
254 __ delayed()->nop();
255 }
256
257 // Implementation of patching:
258 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
259 // - Replace original code with a call to the stub
260 // At Runtime:
261 // - call to stub, jump to runtime
262 // - in runtime: preserve all registers (especially objects, i.e., source and destination object)
263 // - in runtime: after initializing class, restore original code, reexecute instruction
264
265 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
266
267 void PatchingStub::align_patch_site(MacroAssembler* ) {
268 // patch sites on sparc are always properly aligned.
269 }
270
271 void PatchingStub::emit_code(LIR_Assembler* ce) {
272 // copy original code here
273 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF,
274 "not enough room for call");
275 assert((_bytes_to_copy & 0x3) == 0, "must copy a multiple of four bytes");
276
277 Label call_patch;
278
279 int being_initialized_entry = __ offset();
280
281 if (_id == load_klass_id) {
282 // produce a copy of the load klass instruction for use by the being initialized case
283 address start = __ pc();
284 Address addr = Address(_obj, address(NULL), oop_Relocation::spec(_oop_index));
285 __ sethi(addr, true);
286 __ add(addr, _obj, 0);
287
288 #ifdef ASSERT
289 for (int i = 0; i < _bytes_to_copy; i++) {
290 address ptr = (address)(_pc_start + i);
291 int a_byte = (*ptr) & 0xFF;
292 assert(a_byte == *start++, "should be the same code");
293 }
294 #endif
295 } else {
296 // make a copy the code which is going to be patched.
297 for (int i = 0; i < _bytes_to_copy; i++) {
298 address ptr = (address)(_pc_start + i);
299 int a_byte = (*ptr) & 0xFF;
300 __ a_byte (a_byte);
301 }
302 }
303
304 address end_of_patch = __ pc();
305 int bytes_to_skip = 0;
306 if (_id == load_klass_id) {
307 int offset = __ offset();
308 if (CommentedAssembly) {
309 __ block_comment(" being_initialized check");
310 }
311
312 // static field accesses have special semantics while the class
313 // initializer is being run so we emit a test which can be used to
314 // check that this code is being executed by the initializing
315 // thread.
316 assert(_obj != noreg, "must be a valid register");
317 assert(_oop_index >= 0, "must have oop index");
318 __ ld_ptr(_obj, instanceKlass::init_thread_offset_in_bytes() + sizeof(klassOopDesc), G3);
319 __ cmp(G2_thread, G3);
320 __ br(Assembler::notEqual, false, Assembler::pn, call_patch);
321 __ delayed()->nop();
322
323 // load_klass patches may execute the patched code before it's
324 // copied back into place so we need to jump back into the main
325 // code of the nmethod to continue execution.
326 __ br(Assembler::always, false, Assembler::pt, _patch_site_continuation);
327 __ delayed()->nop();
328
329 // make sure this extra code gets skipped
330 bytes_to_skip += __ offset() - offset;
331 }
332
333 // Now emit the patch record telling the runtime how to find the
334 // pieces of the patch. We only need 3 bytes but it has to be
335 // aligned as an instruction so emit 4 bytes.
336 int sizeof_patch_record = 4;
337 bytes_to_skip += sizeof_patch_record;
338
339 // emit the offsets needed to find the code to patch
340 int being_initialized_entry_offset = __ offset() - being_initialized_entry + sizeof_patch_record;
341
342 // Emit the patch record. We need to emit a full word, so emit an extra empty byte
343 __ a_byte(0);
344 __ a_byte(being_initialized_entry_offset);
345 __ a_byte(bytes_to_skip);
346 __ a_byte(_bytes_to_copy);
347 address patch_info_pc = __ pc();
348 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
349
350 address entry = __ pc();
351 NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
352 address target = NULL;
353 switch (_id) {
354 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
355 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); break;
356 default: ShouldNotReachHere();
357 }
358 __ bind(call_patch);
359
360 if (CommentedAssembly) {
361 __ block_comment("patch entry point");
362 }
363 __ call(target, relocInfo::runtime_call_type);
364 __ delayed()->nop();
365 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
366 ce->add_call_info_here(_info);
367 __ br(Assembler::always, false, Assembler::pt, _patch_site_entry);
368 __ delayed()->nop();
369 if (_id == load_klass_id) {
370 CodeSection* cs = __ code_section();
371 address pc = (address)_pc_start;
372 RelocIterator iter(cs, pc, pc + 1);
373 relocInfo::change_reloc_info_for_address(&iter, (address) pc, relocInfo::oop_type, relocInfo::none);
374
375 pc = (address)(_pc_start + NativeMovConstReg::add_offset);
376 RelocIterator iter2(cs, pc, pc+1);
377 relocInfo::change_reloc_info_for_address(&iter2, (address) pc, relocInfo::oop_type, relocInfo::none);
378 }
379
380 }
381
382 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
383 //---------------slow case: call to native-----------------
384 __ bind(_entry);
385 __ mov(src()->as_register(), O0);
386 __ mov(src_pos()->as_register(), O1);
387 __ mov(dst()->as_register(), O2);
388 __ mov(dst_pos()->as_register(), O3);
389 __ mov(length()->as_register(), O4);
390
391 ce->emit_static_call_stub();
392
393 __ call(SharedRuntime::get_resolve_static_call_stub(), relocInfo::static_call_type);
394 __ delayed()->nop();
395 ce->add_call_info_here(info());
396 ce->verify_oop_map(info());
397
398 #ifndef PRODUCT
399 __ set((intptr_t)&Runtime1::_arraycopy_slowcase_cnt, O0);
400 __ ld(O0, 0, O1);
401 __ inc(O1);
402 __ st(O1, 0, O0);
403 #endif
404
405 __ br(Assembler::always, false, Assembler::pt, _continuation);
406 __ delayed()->nop();
407 }
408
409
410 ///////////////////////////////////////////////////////////////////////////////////
411 #ifndef SERIALGC
412
413 void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {
414 __ bind(_entry);
415
416 assert(pre_val()->is_register(), "Precondition.");
417
418 Register pre_val_reg = pre_val()->as_register();
419
420 ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false);
421 __ br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pt,
422 pre_val_reg, _continuation);
423 __ delayed()->nop();
424
425 __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_pre_barrier_slow_id));
426 __ delayed()->mov(pre_val_reg, G4);
427 __ br(Assembler::always, false, Assembler::pt, _continuation);
428 __ delayed()->nop();
429
430 }
431
432 jbyte* G1PostBarrierStub::_byte_map_base = NULL;
433
434 jbyte* G1PostBarrierStub::byte_map_base_slow() {
435 BarrierSet* bs = Universe::heap()->barrier_set();
436 assert(bs->is_a(BarrierSet::G1SATBCTLogging),
437 "Must be if we're using this.");
438 return ((G1SATBCardTableModRefBS*)bs)->byte_map_base;
439 }
440
441 void G1PostBarrierStub::emit_code(LIR_Assembler* ce) {
442 __ bind(_entry);
443
444 assert(addr()->is_register(), "Precondition.");
445 assert(new_val()->is_register(), "Precondition.");
446 Register addr_reg = addr()->as_pointer_register();
447 Register new_val_reg = new_val()->as_register();
448 __ br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pt,
449 new_val_reg, _continuation);
450 __ delayed()->nop();
451
452 __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_post_barrier_slow_id));
453 __ delayed()->mov(addr_reg, G4);
454 __ br(Assembler::always, false, Assembler::pt, _continuation);
455 __ delayed()->nop();
456 }
457
458 #endif // SERIALGC
459 ///////////////////////////////////////////////////////////////////////////////////
460
461 #undef __
462