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comparison src/cpu/sparc/vm/c1_CodeStubs_sparc.cpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children 37f87013dfd8
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1 /*
2 * Copyright 1999-2007 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_c1_CodeStubs_sparc.cpp.incl"
27
28 #define __ ce->masm()->
29
30 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index,
31 bool throw_index_out_of_bounds_exception)
32 : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception)
33 , _index(index)
34 {
35 _info = new CodeEmitInfo(info);
36 }
37
38
39 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
40 __ bind(_entry);
41
42 if (_index->is_register()) {
43 __ mov(_index->as_register(), G4);
44 } else {
45 __ set(_index->as_jint(), G4);
46 }
47 if (_throw_index_out_of_bounds_exception) {
48 __ call(Runtime1::entry_for(Runtime1::throw_index_exception_id), relocInfo::runtime_call_type);
49 } else {
50 __ call(Runtime1::entry_for(Runtime1::throw_range_check_failed_id), relocInfo::runtime_call_type);
51 }
52 __ delayed()->nop();
53 ce->add_call_info_here(_info);
54 ce->verify_oop_map(_info);
55 #ifdef ASSERT
56 __ should_not_reach_here();
57 #endif
58 }
59
60 #ifdef TIERED
61
62 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
63 __ bind(_entry);
64 __ set(_bci, G4);
65 __ call(Runtime1::entry_for(Runtime1::counter_overflow_id), relocInfo::runtime_call_type);
66 __ delayed()->nop();
67 ce->add_call_info_here(_info);
68 ce->verify_oop_map(_info);
69
70 __ br(Assembler::always, true, Assembler::pt, _continuation);
71 __ delayed()->nop();
72 }
73
74 #endif // TIERED
75
76 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
77 if (_offset != -1) {
78 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
79 }
80 __ bind(_entry);
81 __ call(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type);
82 __ delayed()->nop();
83 ce->add_call_info_here(_info);
84 ce->verify_oop_map(_info);
85 #ifdef ASSERT
86 __ should_not_reach_here();
87 #endif
88 }
89
90
91 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
92 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
93 __ bind(_entry);
94 __ call(Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id),
95 relocInfo::runtime_call_type);
96 __ delayed()->nop();
97 ce->add_call_info_here(_info);
98 ce->verify_oop_map(_info);
99 #ifdef ASSERT
100 __ should_not_reach_here();
101 #endif
102 }
103
104
105 // Implementation of SimpleExceptionStub
106 // Note: %g1 and %g3 are already in use
107 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
108 __ bind(_entry);
109 __ call(Runtime1::entry_for(_stub), relocInfo::runtime_call_type);
110
111 if (_obj->is_valid()) {
112 __ delayed()->mov(_obj->as_register(), G4); // _obj contains the optional argument to the stub
113 } else {
114 __ delayed()->mov(G0, G4);
115 }
116 ce->add_call_info_here(_info);
117 #ifdef ASSERT
118 __ should_not_reach_here();
119 #endif
120 }
121
122
123 // Implementation of ArrayStoreExceptionStub
124
125 ArrayStoreExceptionStub::ArrayStoreExceptionStub(CodeEmitInfo* info):
126 _info(info) {
127 }
128
129
130 void ArrayStoreExceptionStub::emit_code(LIR_Assembler* ce) {
131 __ bind(_entry);
132 __ call(Runtime1::entry_for(Runtime1::throw_array_store_exception_id), relocInfo::runtime_call_type);
133 __ delayed()->nop();
134 ce->add_call_info_here(_info);
135 ce->verify_oop_map(_info);
136 #ifdef ASSERT
137 __ should_not_reach_here();
138 #endif
139 }
140
141
142
143
144 // Implementation of NewInstanceStub
145
146 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
147 _result = result;
148 _klass = klass;
149 _klass_reg = klass_reg;
150 _info = new CodeEmitInfo(info);
151 assert(stub_id == Runtime1::new_instance_id ||
152 stub_id == Runtime1::fast_new_instance_id ||
153 stub_id == Runtime1::fast_new_instance_init_check_id,
154 "need new_instance id");
155 _stub_id = stub_id;
156 }
157
158
159 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
160 __ bind(_entry);
161 __ call(Runtime1::entry_for(_stub_id), relocInfo::runtime_call_type);
162 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
163 ce->add_call_info_here(_info);
164 ce->verify_oop_map(_info);
165 __ br(Assembler::always, false, Assembler::pt, _continuation);
166 __ delayed()->mov_or_nop(O0, _result->as_register());
167 }
168
169
170 // Implementation of NewTypeArrayStub
171 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
172 _klass_reg = klass_reg;
173 _length = length;
174 _result = result;
175 _info = new CodeEmitInfo(info);
176 }
177
178
179 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
180 __ bind(_entry);
181
182 __ mov(_length->as_register(), G4);
183 __ call(Runtime1::entry_for(Runtime1::new_type_array_id), relocInfo::runtime_call_type);
184 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
185 ce->add_call_info_here(_info);
186 ce->verify_oop_map(_info);
187 __ br(Assembler::always, false, Assembler::pt, _continuation);
188 __ delayed()->mov_or_nop(O0, _result->as_register());
189 }
190
191
192 // Implementation of NewObjectArrayStub
193
194 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
195 _klass_reg = klass_reg;
196 _length = length;
197 _result = result;
198 _info = new CodeEmitInfo(info);
199 }
200
201
202 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
203 __ bind(_entry);
204
205 __ mov(_length->as_register(), G4);
206 __ call(Runtime1::entry_for(Runtime1::new_object_array_id), relocInfo::runtime_call_type);
207 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
208 ce->add_call_info_here(_info);
209 ce->verify_oop_map(_info);
210 __ br(Assembler::always, false, Assembler::pt, _continuation);
211 __ delayed()->mov_or_nop(O0, _result->as_register());
212 }
213
214
215 // Implementation of MonitorAccessStubs
216 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
217 : MonitorAccessStub(obj_reg, lock_reg) {
218 _info = new CodeEmitInfo(info);
219 }
220
221
222 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
223 __ bind(_entry);
224 __ mov(_obj_reg->as_register(), G4);
225 if (ce->compilation()->has_fpu_code()) {
226 __ call(Runtime1::entry_for(Runtime1::monitorenter_id), relocInfo::runtime_call_type);
227 } else {
228 __ call(Runtime1::entry_for(Runtime1::monitorenter_nofpu_id), relocInfo::runtime_call_type);
229 }
230 __ delayed()->mov_or_nop(_lock_reg->as_register(), G5);
231 ce->add_call_info_here(_info);
232 ce->verify_oop_map(_info);
233 __ br(Assembler::always, true, Assembler::pt, _continuation);
234 __ delayed()->nop();
235 }
236
237
238 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
239 __ bind(_entry);
240 if (_compute_lock) {
241 ce->monitor_address(_monitor_ix, _lock_reg);
242 }
243 if (ce->compilation()->has_fpu_code()) {
244 __ call(Runtime1::entry_for(Runtime1::monitorexit_id), relocInfo::runtime_call_type);
245 } else {
246 __ call(Runtime1::entry_for(Runtime1::monitorexit_nofpu_id), relocInfo::runtime_call_type);
247 }
248
249 __ delayed()->mov_or_nop(_lock_reg->as_register(), G4);
250 __ br(Assembler::always, true, Assembler::pt, _continuation);
251 __ delayed()->nop();
252 }
253
254 // Implementation of patching:
255 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
256 // - Replace original code with a call to the stub
257 // At Runtime:
258 // - call to stub, jump to runtime
259 // - in runtime: preserve all registers (especially objects, i.e., source and destination object)
260 // - in runtime: after initializing class, restore original code, reexecute instruction
261
262 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
263
264 void PatchingStub::align_patch_site(MacroAssembler* ) {
265 // patch sites on sparc are always properly aligned.
266 }
267
268 void PatchingStub::emit_code(LIR_Assembler* ce) {
269 // copy original code here
270 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF,
271 "not enough room for call");
272 assert((_bytes_to_copy & 0x3) == 0, "must copy a multiple of four bytes");
273
274 Label call_patch;
275
276 int being_initialized_entry = __ offset();
277
278 if (_id == load_klass_id) {
279 // produce a copy of the load klass instruction for use by the being initialized case
280 address start = __ pc();
281 Address addr = Address(_obj, address(NULL), oop_Relocation::spec(_oop_index));
282 __ sethi(addr, true);
283 __ add(addr, _obj, 0);
284
285 #ifdef ASSERT
286 for (int i = 0; i < _bytes_to_copy; i++) {
287 address ptr = (address)(_pc_start + i);
288 int a_byte = (*ptr) & 0xFF;
289 assert(a_byte == *start++, "should be the same code");
290 }
291 #endif
292 } else {
293 // make a copy the code which is going to be patched.
294 for (int i = 0; i < _bytes_to_copy; i++) {
295 address ptr = (address)(_pc_start + i);
296 int a_byte = (*ptr) & 0xFF;
297 __ a_byte (a_byte);
298 }
299 }
300
301 address end_of_patch = __ pc();
302 int bytes_to_skip = 0;
303 if (_id == load_klass_id) {
304 int offset = __ offset();
305 if (CommentedAssembly) {
306 __ block_comment(" being_initialized check");
307 }
308
309 // static field accesses have special semantics while the class
310 // initializer is being run so we emit a test which can be used to
311 // check that this code is being executed by the initializing
312 // thread.
313 assert(_obj != noreg, "must be a valid register");
314 assert(_oop_index >= 0, "must have oop index");
315 __ ld_ptr(_obj, instanceKlass::init_thread_offset_in_bytes() + sizeof(klassOopDesc), G3);
316 __ cmp(G2_thread, G3);
317 __ br(Assembler::notEqual, false, Assembler::pn, call_patch);
318 __ delayed()->nop();
319
320 // load_klass patches may execute the patched code before it's
321 // copied back into place so we need to jump back into the main
322 // code of the nmethod to continue execution.
323 __ br(Assembler::always, false, Assembler::pt, _patch_site_continuation);
324 __ delayed()->nop();
325
326 // make sure this extra code gets skipped
327 bytes_to_skip += __ offset() - offset;
328 }
329
330 // Now emit the patch record telling the runtime how to find the
331 // pieces of the patch. We only need 3 bytes but it has to be
332 // aligned as an instruction so emit 4 bytes.
333 int sizeof_patch_record = 4;
334 bytes_to_skip += sizeof_patch_record;
335
336 // emit the offsets needed to find the code to patch
337 int being_initialized_entry_offset = __ offset() - being_initialized_entry + sizeof_patch_record;
338
339 // Emit the patch record. We need to emit a full word, so emit an extra empty byte
340 __ a_byte(0);
341 __ a_byte(being_initialized_entry_offset);
342 __ a_byte(bytes_to_skip);
343 __ a_byte(_bytes_to_copy);
344 address patch_info_pc = __ pc();
345 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
346
347 address entry = __ pc();
348 NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
349 address target = NULL;
350 switch (_id) {
351 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
352 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); break;
353 default: ShouldNotReachHere();
354 }
355 __ bind(call_patch);
356
357 if (CommentedAssembly) {
358 __ block_comment("patch entry point");
359 }
360 __ call(target, relocInfo::runtime_call_type);
361 __ delayed()->nop();
362 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
363 ce->add_call_info_here(_info);
364 __ br(Assembler::always, false, Assembler::pt, _patch_site_entry);
365 __ delayed()->nop();
366 if (_id == load_klass_id) {
367 CodeSection* cs = __ code_section();
368 address pc = (address)_pc_start;
369 RelocIterator iter(cs, pc, pc + 1);
370 relocInfo::change_reloc_info_for_address(&iter, (address) pc, relocInfo::oop_type, relocInfo::none);
371
372 pc = (address)(_pc_start + NativeMovConstReg::add_offset);
373 RelocIterator iter2(cs, pc, pc+1);
374 relocInfo::change_reloc_info_for_address(&iter2, (address) pc, relocInfo::oop_type, relocInfo::none);
375 }
376
377 }
378
379 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
380 //---------------slow case: call to native-----------------
381 __ bind(_entry);
382 __ mov(src()->as_register(), O0);
383 __ mov(src_pos()->as_register(), O1);
384 __ mov(dst()->as_register(), O2);
385 __ mov(dst_pos()->as_register(), O3);
386 __ mov(length()->as_register(), O4);
387
388 ce->emit_static_call_stub();
389
390 __ call(SharedRuntime::get_resolve_static_call_stub(), relocInfo::static_call_type);
391 __ delayed()->nop();
392 ce->add_call_info_here(info());
393 ce->verify_oop_map(info());
394
395 #ifndef PRODUCT
396 __ set((intptr_t)&Runtime1::_arraycopy_slowcase_cnt, O0);
397 __ ld(O0, 0, O1);
398 __ inc(O1);
399 __ st(O1, 0, O0);
400 #endif
401
402 __ br(Assembler::always, false, Assembler::pt, _continuation);
403 __ delayed()->nop();
404 }
405
406
407 #undef __