1 /*
   2  * Copyright (c) 2013, Red Hat Inc.
   3  * Copyright (c) 1999, 2011, Oracle and/or its affiliates.
   4  * All rights reserved.
   5  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   6  *
   7  * This code is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 only, as
   9  * published by the Free Software Foundation.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  *
  25  */
  26 
  27 #include "precompiled.hpp"
  28 #include "c1/c1_CodeStubs.hpp"
  29 #include "c1/c1_FrameMap.hpp"
  30 #include "c1/c1_LIRAssembler.hpp"
  31 #include "c1/c1_MacroAssembler.hpp"
  32 #include "c1/c1_Runtime1.hpp"
  33 #include "nativeInst_aarch64.hpp"
  34 #include "runtime/sharedRuntime.hpp"
  35 #include "vmreg_aarch64.inline.hpp"
  36 #if INCLUDE_ALL_GCS
  37 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
  38 #endif
  39 
  40 
  41 #define __ ce->masm()->
  42 
  43 float ConversionStub::float_zero = 0.0;
  44 double ConversionStub::double_zero = 0.0;
  45 
  46 static Register as_reg(LIR_Opr op) {
  47   return op->is_double_cpu() ? op->as_register_lo() : op->as_register();
  48 }
  49 
  50 void ConversionStub::emit_code(LIR_Assembler* ce) {
  51   __ bind(_entry);
  52 
  53   // FIXME: Agh, this is so painful
  54 
  55   __ enter();
  56   __ sub(sp, sp, 2 * wordSize);
  57   __ push(RegSet::range(r0, r29), sp);         // integer registers except lr & sp
  58   for (int i = 30; i >= 0; i -= 2) // caller-saved fp registers
  59     if (i < 8 || i > 15)
  60       __ stpd(as_FloatRegister(i), as_FloatRegister(i+1),
  61               Address(__ pre(sp, -2 * wordSize)));
  62 
  63   switch(bytecode()) {
  64   case Bytecodes::_f2i:
  65     {
  66       if (v0 != input()->as_float_reg())
  67         __ fmovs(v0, input()->as_float_reg());
  68       __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2i));
  69     }
  70     break;
  71   case Bytecodes::_d2i:
  72     {
  73       if (v0 != input()->as_double_reg())
  74         __ fmovd(v0, input()->as_double_reg());
  75       __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2i));
  76     }
  77     break;
  78   case Bytecodes::_f2l:
  79     {
  80       if (v0 != input()->as_float_reg())
  81         __ fmovs(v0, input()->as_float_reg());
  82       __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::f2l));
  83     }
  84     break;
  85   case Bytecodes::_d2l:
  86     {
  87       if (v0 != input()->as_double_reg())
  88         __ fmovd(v0, input()->as_double_reg());
  89       __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::d2l));
  90     }
  91     break;
  92   default:
  93     ShouldNotReachHere();
  94   }
  95 
  96   __ str(r0, Address(rfp, -wordSize));
  97 
  98   for (int i = 0; i < 32; i += 2)
  99     if (i < 8 || i > 15)
 100       __ ldpd(as_FloatRegister(i), as_FloatRegister(i+1),
 101               Address(__ post(sp, 2 * wordSize)));
 102   __ pop(RegSet::range(r0, r29), sp);
 103 
 104   __ ldr(as_reg(result()), Address(rfp, -wordSize));
 105   __ leave();
 106 
 107   __ b(_continuation);
 108 }
 109 
 110 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
 111   __ bind(_entry);
 112   ce->store_parameter(_method->as_register(), 1);
 113   ce->store_parameter(_bci, 0);
 114   __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id)));
 115   ce->add_call_info_here(_info);
 116   ce->verify_oop_map(_info);
 117   __ b(_continuation);
 118 }
 119 
 120 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index,
 121                                bool throw_index_out_of_bounds_exception)
 122   : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception)
 123   , _index(index)
 124 {
 125   assert(info != NULL, "must have info");
 126   _info = new CodeEmitInfo(info);
 127 }
 128 
 129 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
 130   __ bind(_entry);
 131   if (_info->deoptimize_on_exception()) {
 132     address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
 133     __ far_call(RuntimeAddress(a));
 134     ce->add_call_info_here(_info);
 135     ce->verify_oop_map(_info);
 136     debug_only(__ should_not_reach_here());
 137     return;
 138   }
 139 
 140   if (_index->is_cpu_register()) {
 141     __ mov(rscratch1, _index->as_register());
 142   } else {
 143     __ mov(rscratch1, _index->as_jint());
 144   }
 145   Runtime1::StubID stub_id;
 146   if (_throw_index_out_of_bounds_exception) {
 147     stub_id = Runtime1::throw_index_exception_id;
 148   } else {
 149     stub_id = Runtime1::throw_range_check_failed_id;
 150   }
 151   __ far_call(RuntimeAddress(Runtime1::entry_for(stub_id)), NULL, rscratch2);
 152   ce->add_call_info_here(_info);
 153   ce->verify_oop_map(_info);
 154   debug_only(__ should_not_reach_here());
 155 }
 156 
 157 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
 158   _info = new CodeEmitInfo(info);
 159 }
 160 
 161 void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
 162   __ bind(_entry);
 163   address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
 164   __ far_call(RuntimeAddress(a));
 165   ce->add_call_info_here(_info);
 166   ce->verify_oop_map(_info);
 167   debug_only(__ should_not_reach_here());
 168 }
 169 
 170 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
 171   if (_offset != -1) {
 172     ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
 173   }
 174   __ bind(_entry);
 175   __ far_call(Address(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type));
 176   ce->add_call_info_here(_info);
 177   ce->verify_oop_map(_info);
 178 #ifdef ASSERT
 179   __ should_not_reach_here();
 180 #endif
 181 }
 182 
 183 
 184 
 185 // Implementation of NewInstanceStub
 186 
 187 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
 188   _result = result;
 189   _klass = klass;
 190   _klass_reg = klass_reg;
 191   _info = new CodeEmitInfo(info);
 192   assert(stub_id == Runtime1::new_instance_id                 ||
 193          stub_id == Runtime1::fast_new_instance_id            ||
 194          stub_id == Runtime1::fast_new_instance_init_check_id,
 195          "need new_instance id");
 196   _stub_id   = stub_id;
 197 }
 198 
 199 
 200 
 201 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
 202   assert(__ rsp_offset() == 0, "frame size should be fixed");
 203   __ bind(_entry);
 204   __ mov(r3, _klass_reg->as_register());
 205   __ far_call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
 206   ce->add_call_info_here(_info);
 207   ce->verify_oop_map(_info);
 208   assert(_result->as_register() == r0, "result must in r0,");
 209   __ b(_continuation);
 210 }
 211 
 212 
 213 // Implementation of NewTypeArrayStub
 214 
 215 // Implementation of NewTypeArrayStub
 216 
 217 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
 218   _klass_reg = klass_reg;
 219   _length = length;
 220   _result = result;
 221   _info = new CodeEmitInfo(info);
 222 }
 223 
 224 
 225 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
 226   assert(__ rsp_offset() == 0, "frame size should be fixed");
 227   __ bind(_entry);
 228   assert(_length->as_register() == r19, "length must in r19,");
 229   assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
 230   __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));
 231   ce->add_call_info_here(_info);
 232   ce->verify_oop_map(_info);
 233   assert(_result->as_register() == r0, "result must in r0");
 234   __ b(_continuation);
 235 }
 236 
 237 
 238 // Implementation of NewObjectArrayStub
 239 
 240 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
 241   _klass_reg = klass_reg;
 242   _result = result;
 243   _length = length;
 244   _info = new CodeEmitInfo(info);
 245 }
 246 
 247 
 248 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
 249   assert(__ rsp_offset() == 0, "frame size should be fixed");
 250   __ bind(_entry);
 251   assert(_length->as_register() == r19, "length must in r19,");
 252   assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
 253   __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));
 254   ce->add_call_info_here(_info);
 255   ce->verify_oop_map(_info);
 256   assert(_result->as_register() == r0, "result must in r0");
 257   __ b(_continuation);
 258 }
 259 // Implementation of MonitorAccessStubs
 260 
 261 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
 262 : MonitorAccessStub(obj_reg, lock_reg)
 263 {
 264   _info = new CodeEmitInfo(info);
 265 }
 266 
 267 
 268 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
 269   assert(__ rsp_offset() == 0, "frame size should be fixed");
 270   __ bind(_entry);
 271   ce->store_parameter(_obj_reg->as_register(),  1);
 272   ce->store_parameter(_lock_reg->as_register(), 0);
 273   Runtime1::StubID enter_id;
 274   if (ce->compilation()->has_fpu_code()) {
 275     enter_id = Runtime1::monitorenter_id;
 276   } else {
 277     enter_id = Runtime1::monitorenter_nofpu_id;
 278   }
 279   __ far_call(RuntimeAddress(Runtime1::entry_for(enter_id)));
 280   ce->add_call_info_here(_info);
 281   ce->verify_oop_map(_info);
 282   __ b(_continuation);
 283 }
 284 
 285 
 286 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
 287   __ bind(_entry);
 288   if (_compute_lock) {
 289     // lock_reg was destroyed by fast unlocking attempt => recompute it
 290     ce->monitor_address(_monitor_ix, _lock_reg);
 291   }
 292   ce->store_parameter(_lock_reg->as_register(), 0);
 293   // note: non-blocking leaf routine => no call info needed
 294   Runtime1::StubID exit_id;
 295   if (ce->compilation()->has_fpu_code()) {
 296     exit_id = Runtime1::monitorexit_id;
 297   } else {
 298     exit_id = Runtime1::monitorexit_nofpu_id;
 299   }
 300   __ adr(lr, _continuation);
 301   __ far_jump(RuntimeAddress(Runtime1::entry_for(exit_id)));
 302 }
 303 
 304 
 305 // Implementation of patching:
 306 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
 307 // - Replace original code with a call to the stub
 308 // At Runtime:
 309 // - call to stub, jump to runtime
 310 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
 311 // - in runtime: after initializing class, restore original code, reexecute instruction
 312 
 313 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
 314 
 315 void PatchingStub::align_patch_site(MacroAssembler* masm) {
 316 }
 317 
 318 void PatchingStub::emit_code(LIR_Assembler* ce) {
 319   assert(false, "AArch64 should not use C1 runtime patching");
 320 }
 321 
 322 
 323 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
 324   __ bind(_entry);
 325   __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id)));
 326   ce->add_call_info_here(_info);
 327   DEBUG_ONLY(__ should_not_reach_here());
 328 }
 329 
 330 
 331 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
 332   address a;
 333   if (_info->deoptimize_on_exception()) {
 334     // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
 335     a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
 336   } else {
 337     a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
 338   }
 339 
 340   ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
 341   __ bind(_entry);
 342   __ far_call(RuntimeAddress(a));
 343   ce->add_call_info_here(_info);
 344   ce->verify_oop_map(_info);
 345   debug_only(__ should_not_reach_here());
 346 }
 347 
 348 
 349 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
 350   assert(__ rsp_offset() == 0, "frame size should be fixed");
 351 
 352   __ bind(_entry);
 353   // pass the object in a scratch register because all other registers
 354   // must be preserved
 355   if (_obj->is_cpu_register()) {
 356     __ mov(rscratch1, _obj->as_register());
 357   }
 358   __ far_call(RuntimeAddress(Runtime1::entry_for(_stub)), NULL, rscratch2);
 359   ce->add_call_info_here(_info);
 360   debug_only(__ should_not_reach_here());
 361 }
 362 
 363 
 364 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
 365   //---------------slow case: call to native-----------------
 366   __ bind(_entry);
 367   // Figure out where the args should go
 368   // This should really convert the IntrinsicID to the Method* and signature
 369   // but I don't know how to do that.
 370   //
 371   VMRegPair args[5];
 372   BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
 373   SharedRuntime::java_calling_convention(signature, args, 5, true);
 374 
 375   // push parameters
 376   // (src, src_pos, dest, destPos, length)
 377   Register r[5];
 378   r[0] = src()->as_register();
 379   r[1] = src_pos()->as_register();
 380   r[2] = dst()->as_register();
 381   r[3] = dst_pos()->as_register();
 382   r[4] = length()->as_register();
 383 
 384   // next registers will get stored on the stack
 385   for (int i = 0; i < 5 ; i++ ) {
 386     VMReg r_1 = args[i].first();
 387     if (r_1->is_stack()) {
 388       int st_off = r_1->reg2stack() * wordSize;
 389       __ str (r[i], Address(sp, st_off));
 390     } else {
 391       assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
 392     }
 393   }
 394 
 395   ce->align_call(lir_static_call);
 396 
 397   ce->emit_static_call_stub();
 398   if (ce->compilation()->bailed_out()) {
 399     return; // CodeCache is full
 400   }
 401   Address resolve(SharedRuntime::get_resolve_static_call_stub(),
 402                   relocInfo::static_call_type);
 403   address call = __ trampoline_call(resolve);
 404   if (call == NULL) {
 405     ce->bailout("trampoline stub overflow");
 406     return;
 407   }
 408   ce->add_call_info_here(info());
 409 
 410 #ifndef PRODUCT
 411   __ lea(rscratch2, ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
 412   __ incrementw(Address(rscratch2));
 413 #endif
 414 
 415   __ b(_continuation);
 416 }
 417 
 418 
 419 /////////////////////////////////////////////////////////////////////////////
 420 #if INCLUDE_ALL_GCS
 421 
 422 void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {
 423   // At this point we know that marking is in progress.
 424   // If do_load() is true then we have to emit the
 425   // load of the previous value; otherwise it has already
 426   // been loaded into _pre_val.
 427 
 428   __ bind(_entry);
 429   assert(pre_val()->is_register(), "Precondition.");
 430 
 431   Register pre_val_reg = pre_val()->as_register();
 432 
 433   if (do_load()) {
 434     ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false /*wide*/, false /*unaligned*/);
 435   }
 436   __ cbz(pre_val_reg, _continuation);
 437   ce->store_parameter(pre_val()->as_register(), 0);
 438   __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_pre_barrier_slow_id)));
 439   __ b(_continuation);
 440 }
 441 
 442 jbyte* G1PostBarrierStub::_byte_map_base = NULL;
 443 
 444 jbyte* G1PostBarrierStub::byte_map_base_slow() {
 445   BarrierSet* bs = Universe::heap()->barrier_set();
 446   assert(bs->is_a(BarrierSet::G1SATBCTLogging),
 447          "Must be if we're using this.");
 448   return ((G1SATBCardTableModRefBS*)bs)->byte_map_base;
 449 }
 450 
 451 
 452 void G1PostBarrierStub::emit_code(LIR_Assembler* ce) {
 453   __ bind(_entry);
 454   assert(addr()->is_register(), "Precondition.");
 455   assert(new_val()->is_register(), "Precondition.");
 456   Register new_val_reg = new_val()->as_register();
 457   __ cbz(new_val_reg, _continuation);
 458   ce->store_parameter(addr()->as_pointer_register(), 0);
 459   __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_post_barrier_slow_id)));
 460   __ b(_continuation);
 461 }
 462 
 463 #endif // INCLUDE_ALL_GCS
 464 /////////////////////////////////////////////////////////////////////////////
 465 
 466 #undef __