DBC: Add back special case for float64 load/store

runtime/vm/simulator_dbc.cc

 // Copyright (c) 2016, 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.
 
 #include <setjmp.h>  // NOLINT
 #include <stdlib.h>
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_DBC)
 
@@ skipping 1961 matching lines @@
   }
 
   {
     BYTECODE(LoadIndexedFloat64, A_B_C);
     uint8_t* data = SimulatorHelpers::GetTypedData(FP[rB], FP[rC], 3);
     *reinterpret_cast<uint64_t*>(&FP[rA]) = *reinterpret_cast<uint64_t*>(data);
     DISPATCH();
   }
 
   {
+    BYTECODE(LoadIndexed8Float64, A_B_C);
+    ASSERT(RawObject::IsTypedDataClassId(FP[rB]->GetClassId()));
+    RawTypedData* array = reinterpret_cast<RawTypedData*>(FP[rB]);
+    RawSmi* index = RAW_CAST(Smi, FP[rC]);
+    ASSERT(SimulatorHelpers::CheckIndex(index, array->ptr()->length_));
+    const int64_t value =
+        reinterpret_cast<int64_t*>(array->ptr()->data())[Smi::Value(index)];
+    FP[rA] = reinterpret_cast<RawObject*>(value);
+    DISPATCH();
+  }
+
+  {
     BYTECODE(StoreIndexedFloat64, A_B_C);
     uint8_t* data = SimulatorHelpers::GetTypedData(FP[rA], FP[rB], 3);
     *reinterpret_cast<uint64_t*>(data) = reinterpret_cast<uint64_t>(FP[rC]);
     DISPATCH();
   }
 
   {
+    BYTECODE(StoreIndexed8Float64, A_B_C);
+    ASSERT(RawObject::IsTypedDataClassId(FP[rA]->GetClassId()));
+    RawTypedData* array = reinterpret_cast<RawTypedData*>(FP[rA]);
+    RawSmi* index = RAW_CAST(Smi, FP[rB]);
+    ASSERT(SimulatorHelpers::CheckIndex(index, array->ptr()->length_));
+    const int64_t value = reinterpret_cast<int64_t>(FP[rC]);
+    reinterpret_cast<int64_t*>(array->ptr()->data())[Smi::Value(index)] = value;
+    DISPATCH();
+  }
+
+  {
     BYTECODE(BoxInt32, A_D);
     // Casts sign-extend high 32 bits from low 32 bits.
     const intptr_t value = reinterpret_cast<intptr_t>(FP[rD]);
     const int32_t value32 = static_cast<int32_t>(value);
     FP[rA] = Smi::New(static_cast<intptr_t>(value32));
     DISPATCH();
   }
 
   {
     BYTECODE(BoxUint32, A_D);
@@ skipping 106 matching lines @@
     DISPATCH();
   }
 
   {
     BYTECODE(LoadIndexedFloat64, A_B_C);
     UNREACHABLE();
     DISPATCH();
   }
 
   {
+    BYTECODE(LoadIndexed8Float64, A_B_C);
+    UNREACHABLE();
+    DISPATCH();
+  }
+
+  {
     BYTECODE(StoreIndexedFloat64, A_B_C);
     UNREACHABLE();
     DISPATCH();
   }
 
   {
+    BYTECODE(StoreIndexed8Float64, A_B_C);
+    UNREACHABLE();
+    DISPATCH();
+  }
+
+  {
     BYTECODE(BoxInt32, A_D);
     UNREACHABLE();
     DISPATCH();
   }
 
   {
     BYTECODE(BoxUint32, A_D);
     UNREACHABLE();
     DISPATCH();
   }
@@ skipping 1060 matching lines @@
   pc_ = pc;
   special_[kExceptionSpecialIndex] = raw_exception;
   special_[kStacktraceSpecialIndex] = raw_stacktrace;
   buf->Longjmp();
   UNREACHABLE();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_DBC