MIPS64: Add optimizations to li and Dsubu macro.

src/mips64/macro-assembler-mips64.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.
 
 #ifndef V8_MIPS_MACRO_ASSEMBLER_MIPS_H_
 #define V8_MIPS_MACRO_ASSEMBLER_MIPS_H_
 
 #include "src/assembler.h"
 #include "src/globals.h"
 #include "src/mips64/assembler-mips64.h"
@@ skipping 722 matching lines @@
   void Sd(Register rd, const MemOperand& rs);
 
   void Lwc1(FPURegister fd, const MemOperand& src);
   void Swc1(FPURegister fs, const MemOperand& dst);
 
   void Ldc1(FPURegister fd, const MemOperand& src);
   void Sdc1(FPURegister fs, const MemOperand& dst);
 
   // Load int32 in the rd register.
   void li(Register rd, Operand j, LiFlags mode = OPTIMIZE_SIZE);
+  void li_optimized(Register rd, Operand j, LiFlags mode = OPTIMIZE_SIZE);
+  static int InstrCountForLi64Bit(int64_t value);
   inline void LiLower32BitHelper(Register rd, Operand j);
   inline void li(Register rd, int64_t j, LiFlags mode = OPTIMIZE_SIZE) {
     li(rd, Operand(j), mode);
   }
   void li(Register dst, Handle<Object> value, LiFlags mode = OPTIMIZE_SIZE);
 
   // Push multiple registers on the stack.
   // Registers are saved in numerical order, with higher numbered registers
   // saved in higher memory addresses.
   void MultiPush(RegList regs);
@@ skipping 1221 matching lines @@
     dd(GetLabelFunction(index));
   }
 }
 
 #define ACCESS_MASM(masm) masm->
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MIPS_MACRO_ASSEMBLER_MIPS_H_