PPC: [turbofan] Implemented the TruncateFloat64ToUint64 TurboFan operator.

src/ppc/assembler-ppc.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 1042 matching lines @@
   void fcfidu(const DoubleRegister frt, const DoubleRegister frb,
               RCBit rc = LeaveRC);
   void fcfidus(const DoubleRegister frt, const DoubleRegister frb,
                RCBit rc = LeaveRC);
   void fcfids(const DoubleRegister frt, const DoubleRegister frb,
               RCBit rc = LeaveRC);
   void fctid(const DoubleRegister frt, const DoubleRegister frb,
              RCBit rc = LeaveRC);
   void fctidz(const DoubleRegister frt, const DoubleRegister frb,
               RCBit rc = LeaveRC);
+  void fctidu(const DoubleRegister frt, const DoubleRegister frb,
+              RCBit rc = LeaveRC);
+  void fctiduz(const DoubleRegister frt, const DoubleRegister frb,
+               RCBit rc = LeaveRC);
   void fsel(const DoubleRegister frt, const DoubleRegister fra,
             const DoubleRegister frc, const DoubleRegister frb,
             RCBit rc = LeaveRC);
   void fneg(const DoubleRegister frt, const DoubleRegister frb,
             RCBit rc = LeaveRC);
   void mtfsfi(int bf, int immediate, RCBit rc = LeaveRC);
   void mffs(const DoubleRegister frt, RCBit rc = LeaveRC);
   void mtfsf(const DoubleRegister frb, bool L = 1, int FLM = 0, bool W = 0,
              RCBit rc = LeaveRC);
   void fsqrt(const DoubleRegister frt, const DoubleRegister frb,
@@ skipping 382 matching lines @@
 
 
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) { assembler->CheckBuffer(); }
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PPC_ASSEMBLER_PPC_H_