Adds StoreIntoObject for arm64.

runtime/vm/assembler_arm64.h

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_ASSEMBLER_ARM64_H_
 #define VM_ASSEMBLER_ARM64_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_arm64.h directly; use assembler.h instead.
 #endif
@@ skipping 600 matching lines @@
     ldr(PP, Address(SP, 1 * kWordSize, Address::PostIndex));
     sub(PP, PP, Operand(kHeapObjectTag));
   }
   void tst(Register rn, Operand o) {
     ands(ZR, rn, o);
   }
   void tsti(Register rn, uint64_t imm) {
     andis(ZR, rn, imm);
   }
 
+  void Lsl(Register rd, Register rn, int shift) {
+    add(rd, ZR, Operand(rn, LSL, shift));
+  }
+  void Lsr(Register rd, Register rn, int shift) {
+    add(rd, ZR, Operand(rn, LSR, shift));
+  }
+  void Asr(Register rd, Register rn, int shift) {
+    add(rd, ZR, Operand(rn, ASR, shift));
+  }
+
   void SmiUntag(Register reg) {
-    add(reg, ZR, Operand(reg, ASR, kSmiTagSize));
+    Asr(reg, reg, kSmiTagSize);
   }
 
   // Branching to ExternalLabels.
   void Branch(const ExternalLabel* label) {
     LoadExternalLabel(TMP, label, kPatchable, PP);
     br(TMP);
   }
 
   void BranchPatchable(const ExternalLabel* label) {
     LoadPatchableImmediate(TMP, label->address());
@@ skipping 23 matching lines @@
   void CompareImmediate(Register rn, int64_t imm, Register pp);
   void LoadFromOffset(Register dest, Register base, int32_t offset);
   void LoadFieldFromOffset(Register dest, Register base, int32_t offset) {
     LoadFromOffset(dest, base, offset - kHeapObjectTag);
   }
   void StoreToOffset(Register dest, Register base, int32_t offset);
   void StoreFieldToOffset(Register dest, Register base, int32_t offset) {
     StoreToOffset(dest, base, offset - kHeapObjectTag);
   }
 
+  // Storing into an object.
+  void StoreIntoObject(Register object,
+                       const Address& dest,
+                       Register value,
+                       bool can_value_be_smi = true);
+  void StoreIntoObjectNoBarrier(Register object,
+                                const Address& dest,
+                                Register value);
+  void StoreIntoObjectNoBarrier(Register object,
+                                const Address& dest,
+                                const Object& value);
+
   // Object pool, loading from pool, etc.
   void LoadPoolPointer(Register pp);
 
   enum Patchability {
     kPatchable,
     kNotPatchable,
   };
 
   void LoadWordFromPoolOffset(Register dst, Register pp, uint32_t offset);
   intptr_t FindExternalLabel(const ExternalLabel* label,
@@ skipping 13 matching lines @@
     LoadObject(TMP, object, pp);
     Push(TMP);
   }
 
   void EnterFrame(intptr_t frame_size);
   void LeaveFrame();
 
   void EnterDartFrame(intptr_t frame_size);
   void LeaveDartFrame();
 
+  void EnterCallRuntimeFrame(intptr_t frame_size);
+  void LeaveCallRuntimeFrame();
+
   void CallRuntime(const RuntimeEntry& entry, intptr_t argument_count);
 
  private:
   AssemblerBuffer buffer_;  // Contains position independent code.
 
   // Objects and patchable jump targets.
   GrowableObjectArray& object_pool_;
 
   // Patchability of pool entries.
   GrowableArray<Patchability> patchable_pool_entries_;
@@ skipping 286 matching lines @@
     const int32_t size = (sz == kDoubleWord) ? B31 : 0;
     const int32_t encoding =
         op | size |
         (static_cast<int32_t>(crd) << kRdShift) |
         (static_cast<int32_t>(crn) << kRnShift) |
         (static_cast<int32_t>(crm) << kRmShift) |
         (static_cast<int32_t>(cra) << kRaShift);
     Emit(encoding);
   }
 
+  void StoreIntoObjectFilter(Register object, Register value, Label* no_update);
+
+  // Shorter filtering sequence that assumes that value is not a smi.
+  void StoreIntoObjectFilterNoSmi(Register object,
+                                  Register value,
+                                  Label* no_update);
+
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_ARM64_H_