Add {lda,stl}x?r{,b,h} instructions to ARM64 assembler/disassembler

src/arm64/simulator-arm64.cc

Index: src/arm64/simulator-arm64.cc
diff --git a/src/arm64/simulator-arm64.cc b/src/arm64/simulator-arm64.cc
index 81dbdf8850152d15c6991cc7d23e4f1aaffc1c17..5d4f136b7e8714d23551db7e17e3660ea001907d 100644
--- a/src/arm64/simulator-arm64.cc
+++ b/src/arm64/simulator-arm64.cc
@@ -1900,6 +1900,13 @@ void Simulator::LoadStoreWriteBack(unsigned addr_reg,
   }
 }
 
+void Simulator::VisitLoadStoreAcquireRelease(Instruction* instr) {
+  // TODO(binji)
+}
+
+void Simulator::VisitStoreReleaseExclusive(Instruction* instr) {
+  // TODO(binji)
+}
 
 void Simulator::CheckMemoryAccess(uintptr_t address, uintptr_t stack) {
   if ((address >= stack_limit_) && (address < stack)) {