PPC64: [turbofan] Changed TruncateFloat64ToInt64 to TryTruncateFloat64ToInt64.

src/ppc/simulator-ppc.h

 // Copyright 2014 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 PPC instructions if we are not generating a native
 // PPC binary. This Simulator allows us to run and debug PPC 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 305 matching lines @@
   bool ExecuteExt2_9bit_part2(Instruction* instr);
   void ExecuteExt2_5bit(Instruction* instr);
   void ExecuteExt2(Instruction* instr);
   void ExecuteExt3(Instruction* instr);
   void ExecuteExt4(Instruction* instr);
 #if V8_TARGET_ARCH_PPC64
   void ExecuteExt5(Instruction* instr);
 #endif
   void ExecuteGeneric(Instruction* instr);
 
+  void SetFPSCR(int bit) { fp_condition_reg_ |= (1 << (31 - bit)); }
+  void ClearFPSCR(int bit) { fp_condition_reg_ &= ~(1 << (31 - bit)); }
+
   // Executes one instruction.
   void ExecuteInstruction(Instruction* instr);
 
   // ICache.
   static void CheckICache(v8::internal::HashMap* i_cache, Instruction* instr);
   static void FlushOnePage(v8::internal::HashMap* i_cache, intptr_t start,
                            int size);
   static CachePage* GetCachePage(v8::internal::HashMap* i_cache, void* page);
 
   // Runtime call support.
@@ skipping 93 matching lines @@
 
   static inline void UnregisterCTryCatch(v8::internal::Isolate* isolate) {
     Simulator::current(isolate)->PopAddress();
   }
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // !defined(USE_SIMULATOR)
 #endif  // V8_PPC_SIMULATOR_PPC_H_