Harmony: optimize Math.clz32.

src/a64/lithium-a64.h

 // Copyright 2013 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 112 matching lines @@
   V(LoadKeyedExternal)                          \
   V(LoadKeyedFixed)                             \
   V(LoadKeyedFixedDouble)                       \
   V(LoadKeyedGeneric)                           \
   V(LoadNamedField)                             \
   V(LoadNamedGeneric)                           \
   V(LoadRoot)                                   \
   V(MapEnumLength)                              \
   V(MathAbs)                                    \
   V(MathAbsTagged)                              \
+  V(MathClz32)                                  \
   V(MathExp)                                    \
   V(MathFloor)                                  \
   V(MathFloorOfDiv)                             \
   V(MathLog)                                    \
   V(MathMinMax)                                 \
   V(MathPowHalf)                                \
   V(MathRound)                                  \
   V(MathSqrt)                                   \
   V(ModI)                                       \
   V(MulConstIS)                                 \
@@ skipping 1756 matching lines @@
 };
 
 
 class LMathLog V8_FINAL : public LUnaryMathOperation<0> {
  public:
   explicit LMathLog(LOperand* value) : LUnaryMathOperation<0>(value) { }
   DECLARE_CONCRETE_INSTRUCTION(MathLog, "math-log")
 };
 
 
+class LMathClz32 V8_FINAL : public LUnaryMathOperation<0> {
+ public:
+  explicit LMathClz32(LOperand* value) : LUnaryMathOperation<0>(value) { }
+  DECLARE_CONCRETE_INSTRUCTION(MathClz32, "math-clz32")
+};
+
+
 class LMathMinMax V8_FINAL : public LTemplateInstruction<1, 2, 0> {
  public:
   LMathMinMax(LOperand* left, LOperand* right) {
     inputs_[0] = left;
     inputs_[1] = right;
   }
 
   LOperand* left() { return inputs_[0]; }
   LOperand* right() { return inputs_[1]; }
 
@@ skipping 1039 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_A64_LITHIUM_A64_H_