c1_CodeStubs_sparc.cpp revision 0:a61af66fc99e
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 30RangeCheckStub::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 39void 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 62void 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 76void 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 91void 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 107void 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 125ArrayStoreExceptionStub::ArrayStoreExceptionStub(CodeEmitInfo* info): 126 _info(info) { 127} 128 129 130void 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 146NewInstanceStub::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 159void 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 171NewTypeArrayStub::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 179void 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 194NewObjectArrayStub::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 202void 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 216MonitorEnterStub::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 222void 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 238void 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 262int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size; 263 264void PatchingStub::align_patch_site(MacroAssembler* ) { 265 // patch sites on sparc are always properly aligned. 266} 267 268void 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 379void 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 __ 408