[wasm] Int64Lowering of Int64Sub on ia32 and arm.

src/arm/simulator-arm.h

 // Copyright 2012 the V8 project authors. 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 ARM instructions if we are not generating a native
 // ARM binary. This Simulator allows us to run and debug ARM code generation on
 // regular desktop machines.
 // V8 calls into generated code by "calling" the CALL_GENERATED_CODE macro,
 // which will start execution in the Simulator or forwards to the real entry
@@ skipping 244 matching lines @@
 
   // Checks if the current instruction should be executed based on its
   // condition bits.
   inline bool ConditionallyExecute(Instruction* instr);
 
   // Helper functions to set the conditional flags in the architecture state.
   void SetNZFlags(int32_t val);
   void SetCFlag(bool val);
   void SetVFlag(bool val);
   bool CarryFrom(int32_t left, int32_t right, int32_t carry = 0);
-  bool BorrowFrom(int32_t left, int32_t right);
+  bool BorrowFrom(int32_t left, int32_t right, int32_t carry = 1);
   bool OverflowFrom(int32_t alu_out,
                     int32_t left,
                     int32_t right,
                     bool addition);
 
   inline int GetCarry() {
     return c_flag_ ? 1 : 0;
   }
 
   // Support for VFP.
@@ skipping 191 matching lines @@
   static inline void UnregisterCTryCatch(v8::internal::Isolate* isolate) {
     Simulator::current(isolate)->PopAddress();
   }
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // !defined(USE_SIMULATOR)
 #endif  // V8_ARM_SIMULATOR_ARM_H_