X64: Added inline keyed load/store and a bunch of other missing functions.

src/x64/assembler-x64.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 274 matching lines @@
 
 // -----------------------------------------------------------------------------
 // Machine instruction Operands
 
 enum ScaleFactor {
   times_1 = 0,
   times_2 = 1,
   times_4 = 2,
   times_8 = 3,
   times_int_size = times_4,
+  times_half_pointer_size = times_4,
   times_pointer_size = times_8
 };
 
 
 class Operand BASE_EMBEDDED {
  public:
   // [base + disp/r]
   Operand(Register base, int32_t disp);
 
   // [base + index*scale + disp/r]
@@ skipping 906 matching lines @@
  private:
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_ASSEMBLER_X64_H_