--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/cpu/aarch64/vm/c1_CodeStubs_aarch64.cpp	Tue Jan 20 12:47:43 2015 -0800
@@ -0,0 +1,391 @@
+/*
+ * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, Red Hat Inc. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "c1/c1_CodeStubs.hpp"
+#include "c1/c1_FrameMap.hpp"
+#include "c1/c1_LIRAssembler.hpp"
+#include "c1/c1_MacroAssembler.hpp"
+#include "c1/c1_Runtime1.hpp"
+#include "nativeInst_aarch64.hpp"
+#include "runtime/sharedRuntime.hpp"
+#include "vmreg_aarch64.inline.hpp"
+#if INCLUDE_ALL_GCS
+#include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
+#endif
+
+
+#define __ ce->masm()->
+
+void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
+  __ bind(_entry);
+  ce->store_parameter(_method->as_register(), 1);
+  ce->store_parameter(_bci, 0);
+  __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id)));
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+  __ b(_continuation);
+}
+
+RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index,
+                               bool throw_index_out_of_bounds_exception)
+  : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception)
+  , _index(index)
+{
+  assert(info != NULL, "must have info");
+  _info = new CodeEmitInfo(info);
+}
+
+void RangeCheckStub::emit_code(LIR_Assembler* ce) {
+  __ bind(_entry);
+  if (_info->deoptimize_on_exception()) {
+    address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
+    __ far_call(RuntimeAddress(a));
+    ce->add_call_info_here(_info);
+    ce->verify_oop_map(_info);
+    debug_only(__ should_not_reach_here());
+    return;
+  }
+
+  if (_index->is_cpu_register()) {
+    __ mov(rscratch1, _index->as_register());
+  } else {
+    __ mov(rscratch1, _index->as_jint());
+  }
+  Runtime1::StubID stub_id;
+  if (_throw_index_out_of_bounds_exception) {
+    stub_id = Runtime1::throw_index_exception_id;
+  } else {
+    stub_id = Runtime1::throw_range_check_failed_id;
+  }
+  __ far_call(RuntimeAddress(Runtime1::entry_for(stub_id)), NULL, rscratch2);
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+  debug_only(__ should_not_reach_here());
+}
+
+PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
+  _info = new CodeEmitInfo(info);
+}
+
+void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
+  __ bind(_entry);
+  address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
+  __ far_call(RuntimeAddress(a));
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+  debug_only(__ should_not_reach_here());
+}
+
+void DivByZeroStub::emit_code(LIR_Assembler* ce) {
+  if (_offset != -1) {
+    ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
+  }
+  __ bind(_entry);
+  __ far_call(Address(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type));
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+#ifdef ASSERT
+  __ should_not_reach_here();
+#endif
+}
+
+
+
+// Implementation of NewInstanceStub
+
+NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
+  _result = result;
+  _klass = klass;
+  _klass_reg = klass_reg;
+  _info = new CodeEmitInfo(info);
+  assert(stub_id == Runtime1::new_instance_id                 ||
+         stub_id == Runtime1::fast_new_instance_id            ||
+         stub_id == Runtime1::fast_new_instance_init_check_id,
+         "need new_instance id");
+  _stub_id   = stub_id;
+}
+
+
+
+void NewInstanceStub::emit_code(LIR_Assembler* ce) {
+  assert(__ rsp_offset() == 0, "frame size should be fixed");
+  __ bind(_entry);
+  __ mov(r3, _klass_reg->as_register());
+  __ far_call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+  assert(_result->as_register() == r0, "result must in r0,");
+  __ b(_continuation);
+}
+
+
+// Implementation of NewTypeArrayStub
+
+// Implementation of NewTypeArrayStub
+
+NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
+  _klass_reg = klass_reg;
+  _length = length;
+  _result = result;
+  _info = new CodeEmitInfo(info);
+}
+
+
+void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
+  assert(__ rsp_offset() == 0, "frame size should be fixed");
+  __ bind(_entry);
+  assert(_length->as_register() == r19, "length must in r19,");
+  assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
+  __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+  assert(_result->as_register() == r0, "result must in r0");
+  __ b(_continuation);
+}
+
+
+// Implementation of NewObjectArrayStub
+
+NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
+  _klass_reg = klass_reg;
+  _result = result;
+  _length = length;
+  _info = new CodeEmitInfo(info);
+}
+
+
+void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
+  assert(__ rsp_offset() == 0, "frame size should be fixed");
+  __ bind(_entry);
+  assert(_length->as_register() == r19, "length must in r19,");
+  assert(_klass_reg->as_register() == r3, "klass_reg must in r3");
+  __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+  assert(_result->as_register() == r0, "result must in r0");
+  __ b(_continuation);
+}
+// Implementation of MonitorAccessStubs
+
+MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
+: MonitorAccessStub(obj_reg, lock_reg)
+{
+  _info = new CodeEmitInfo(info);
+}
+
+
+void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
+  assert(__ rsp_offset() == 0, "frame size should be fixed");
+  __ bind(_entry);
+  ce->store_parameter(_obj_reg->as_register(),  1);
+  ce->store_parameter(_lock_reg->as_register(), 0);
+  Runtime1::StubID enter_id;
+  if (ce->compilation()->has_fpu_code()) {
+    enter_id = Runtime1::monitorenter_id;
+  } else {
+    enter_id = Runtime1::monitorenter_nofpu_id;
+  }
+  __ far_call(RuntimeAddress(Runtime1::entry_for(enter_id)));
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+  __ b(_continuation);
+}
+
+
+void MonitorExitStub::emit_code(LIR_Assembler* ce) {
+  __ bind(_entry);
+  if (_compute_lock) {
+    // lock_reg was destroyed by fast unlocking attempt => recompute it
+    ce->monitor_address(_monitor_ix, _lock_reg);
+  }
+  ce->store_parameter(_lock_reg->as_register(), 0);
+  // note: non-blocking leaf routine => no call info needed
+  Runtime1::StubID exit_id;
+  if (ce->compilation()->has_fpu_code()) {
+    exit_id = Runtime1::monitorexit_id;
+  } else {
+    exit_id = Runtime1::monitorexit_nofpu_id;
+  }
+  __ adr(lr, _continuation);
+  __ far_jump(RuntimeAddress(Runtime1::entry_for(exit_id)));
+}
+
+
+// Implementation of patching:
+// - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
+// - Replace original code with a call to the stub
+// At Runtime:
+// - call to stub, jump to runtime
+// - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
+// - in runtime: after initializing class, restore original code, reexecute instruction
+
+int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
+
+void PatchingStub::align_patch_site(MacroAssembler* masm) {
+}
+
+void PatchingStub::emit_code(LIR_Assembler* ce) {
+  assert(false, "AArch64 should not use C1 runtime patching");
+}
+
+
+void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
+  __ bind(_entry);
+  __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id)));
+  ce->add_call_info_here(_info);
+  DEBUG_ONLY(__ should_not_reach_here());
+}
+
+
+void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
+  address a;
+  if (_info->deoptimize_on_exception()) {
+    // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
+    a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
+  } else {
+    a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
+  }
+
+  ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
+  __ bind(_entry);
+  __ far_call(RuntimeAddress(a));
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+  debug_only(__ should_not_reach_here());
+}
+
+
+void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
+  assert(__ rsp_offset() == 0, "frame size should be fixed");
+
+  __ bind(_entry);
+  // pass the object in a scratch register because all other registers
+  // must be preserved
+  if (_obj->is_cpu_register()) {
+    __ mov(rscratch1, _obj->as_register());
+  }
+  __ far_call(RuntimeAddress(Runtime1::entry_for(_stub)), NULL, rscratch2);
+  ce->add_call_info_here(_info);
+  debug_only(__ should_not_reach_here());
+}
+
+
+void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
+  //---------------slow case: call to native-----------------
+  __ bind(_entry);
+  // Figure out where the args should go
+  // This should really convert the IntrinsicID to the Method* and signature
+  // but I don't know how to do that.
+  //
+  VMRegPair args[5];
+  BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
+  SharedRuntime::java_calling_convention(signature, args, 5, true);
+
+  // push parameters
+  // (src, src_pos, dest, destPos, length)
+  Register r[5];
+  r[0] = src()->as_register();
+  r[1] = src_pos()->as_register();
+  r[2] = dst()->as_register();
+  r[3] = dst_pos()->as_register();
+  r[4] = length()->as_register();
+
+  // next registers will get stored on the stack
+  for (int i = 0; i < 5 ; i++ ) {
+    VMReg r_1 = args[i].first();
+    if (r_1->is_stack()) {
+      int st_off = r_1->reg2stack() * wordSize;
+      __ str (r[i], Address(sp, st_off));
+    } else {
+      assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
+    }
+  }
+
+  ce->align_call(lir_static_call);
+
+  ce->emit_static_call_stub();
+  Address resolve(SharedRuntime::get_resolve_static_call_stub(),
+                  relocInfo::static_call_type);
+  __ trampoline_call(resolve);
+  ce->add_call_info_here(info());
+
+#ifndef PRODUCT
+  __ lea(rscratch2, ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
+  __ incrementw(Address(rscratch2));
+#endif
+
+  __ b(_continuation);
+}
+
+
+/////////////////////////////////////////////////////////////////////////////
+#if INCLUDE_ALL_GCS
+
+void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {
+  // At this point we know that marking is in progress.
+  // If do_load() is true then we have to emit the
+  // load of the previous value; otherwise it has already
+  // been loaded into _pre_val.
+
+  __ bind(_entry);
+  assert(pre_val()->is_register(), "Precondition.");
+
+  Register pre_val_reg = pre_val()->as_register();
+
+  if (do_load()) {
+    ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false /*wide*/, false /*unaligned*/);
+  }
+  __ cbz(pre_val_reg, _continuation);
+  ce->store_parameter(pre_val()->as_register(), 0);
+  __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_pre_barrier_slow_id)));
+  __ b(_continuation);
+}
+
+jbyte* G1PostBarrierStub::_byte_map_base = NULL;
+
+jbyte* G1PostBarrierStub::byte_map_base_slow() {
+  BarrierSet* bs = Universe::heap()->barrier_set();
+  assert(bs->is_a(BarrierSet::G1SATBCTLogging),
+         "Must be if we're using this.");
+  return ((G1SATBCardTableModRefBS*)bs)->byte_map_base;
+}
+
+
+void G1PostBarrierStub::emit_code(LIR_Assembler* ce) {
+  __ bind(_entry);
+  assert(addr()->is_register(), "Precondition.");
+  assert(new_val()->is_register(), "Precondition.");
+  Register new_val_reg = new_val()->as_register();
+  __ cbz(new_val_reg, _continuation);
+  ce->store_parameter(addr()->as_pointer_register(), 0);
+  __ far_call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_post_barrier_slow_id)));
+  __ b(_continuation);
+}
+
+#endif // INCLUDE_ALL_GCS
+/////////////////////////////////////////////////////////////////////////////
+
+#undef __