PPC64: Implemented the RoundUint64ToFloat64 TurboFan operator.

src/ppc/constants-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.
 
 #ifndef V8_PPC_CONSTANTS_PPC_H_
 #define V8_PPC_CONSTANTS_PPC_H_
 
 #include <stdint.h>
 
 #include "src/base/logging.h"
@@ skipping 274 matching lines @@
   MTFSFI = 134 << 1,  // Move to FPSCR Field Immediate
   FABS = 264 << 1,    // Floating Absolute Value
   FRIN = 392 << 1,    // Floating Round to Integer Nearest
   FRIZ = 424 << 1,    // Floating Round to Integer Toward Zero
   FRIP = 456 << 1,    // Floating Round to Integer Plus
   FRIM = 488 << 1,    // Floating Round to Integer Minus
   MFFS = 583 << 1,    // move from FPSCR x-form
   MTFSF = 711 << 1,   // move to FPSCR fields XFL-form
   FCFID = 846 << 1,   // Floating convert from integer doubleword
   FCTID = 814 << 1,   // Floating convert from integer doubleword
-  FCTIDZ = 815 << 1   // Floating convert from integer doubleword
+  FCTIDZ = 815 << 1,  // Floating convert from integer doubleword
+  FCFIDU = 974 << 1   // Floating convert from integer doubleword unsigned
 };
 
 enum OpcodeExt5 {
   // Bits 4-2
   RLDICL = 0 << 1,  // Rotate Left Double Word Immediate then Clear Left
   RLDICR = 2 << 1,  // Rotate Left Double Word Immediate then Clear Right
   RLDIC = 4 << 1,   // Rotate Left Double Word Immediate then Clear
   RLDIMI = 6 << 1,  // Rotate Left Double Word Immediate then Mask Insert
   // Bits 4-1
   RLDCL = 8 << 1,  // Rotate Left Double Word then Clear Left
@@ skipping 272 matching lines @@
   // Lookup the register number for the name provided.
   static int Number(const char* name);
 
  private:
   static const char* names_[kNumDoubleRegisters];
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PPC_CONSTANTS_PPC_H_