Fix 32-bit and 64-bit carry out calculation in arm64 simulator.

runtime/vm/simulator_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.
 
 // Declares a Simulator for ARM64 instructions if we are not generating a native
 // ARM64 binary. This Simulator allows us to run and debug ARM64 code generation
 // on regular desktop machines.
 // Dart calls into generated code by "calling" the InvokeDartCode stub,
 // which will start execution in the Simulator or forwards to the real entry
 // on a ARM64 HW platform.
@@ skipping 157 matching lines @@
 
   inline uint32_t ReadWU(uword addr, Instr* instr);
   inline int32_t ReadW(uword addr, Instr* instr);
   inline void WriteW(uword addr, uint32_t value, Instr* instr);
 
   inline intptr_t ReadX(uword addr, Instr* instr);
   inline void WriteX(uword addr, intptr_t value, Instr* instr);
 
   // Helper functions to set the conditional flags in the architecture state.
   void SetNZFlagsW(int32_t val);
-  bool CarryFromW(int32_t left, int32_t right);
-  bool BorrowFromW(int32_t left, int32_t right);
-  bool OverflowFromW(
-      int32_t alu_out, int32_t left, int32_t right, bool addition);
+  bool CarryFromW(int32_t left, int32_t right, int32_t carry);
+  bool OverflowFromW(int32_t left, int32_t right, int32_t carry);
 
   void SetNZFlagsX(int64_t val);
-  bool CarryFromX(int64_t left, int64_t right);
-  bool BorrowFromX(int64_t left, int64_t right);
+  bool CarryFromX(int64_t alu_out, int64_t left, int64_t right, bool addition);
   bool OverflowFromX(
       int64_t alu_out, int64_t left, int64_t right, bool addition);
 
   void SetCFlag(bool val);
   void SetVFlag(bool val);
 
   int64_t ShiftOperand(uint8_t reg_size,
                        int64_t value,
                        Shift shift_type,
                        uint8_t amount);
@@ skipping 28 matching lines @@
   }
 
   friend class SimulatorDebugger;
   friend class SimulatorSetjmpBuffer;
   DISALLOW_COPY_AND_ASSIGN(Simulator);
 };
 
 }  // namespace dart
 
 #endif  // VM_SIMULATOR_ARM64_H_