MIPS: Harmony: optimize Math.clz32.

src/mips/lithium-mips.h

Index: src/mips/lithium-mips.h
diff --git a/src/mips/lithium-mips.h b/src/mips/lithium-mips.h
index 258502dc263613766aaab92f452ec411bb8b601e..67836cf7b38ca6cf05a62e83a37b5994b65886ce 100644
--- a/src/mips/lithium-mips.h
+++ b/src/mips/lithium-mips.h
@@ -125,6 +125,7 @@ class LCodeGen;
   V(MapEnumLength)                              \
   V(MathAbs)                                    \
   V(MathExp)                                    \
+  V(MathClz32)                                  \
   V(MathFloor)                                  \
   V(MathFloorOfDiv)                             \
   V(MathLog)                                    \
@@ -802,6 +803,18 @@ class LMathLog V8_FINAL : public LTemplateInstruction<1, 1, 0> {
 };
 
 
+class LMathClz32 V8_FINAL : public LTemplateInstruction<1, 1, 0> {
+ public:
+  explicit LMathClz32(LOperand* value) {
+    inputs_[0] = value;
+  }
+
+  LOperand* value() { return inputs_[0]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(MathClz32, "math-clz32")
+};
+
+
 class LMathExp V8_FINAL : public LTemplateInstruction<1, 1, 3> {
  public:
   LMathExp(LOperand* value,
@@ -2578,6 +2591,7 @@ class LChunkBuilder V8_FINAL : public LChunkBuilderBase {
   LInstruction* DoMathExp(HUnaryMathOperation* instr);
   LInstruction* DoMathSqrt(HUnaryMathOperation* instr);
   LInstruction* DoMathPowHalf(HUnaryMathOperation* instr);
+  LInstruction* DoMathClz32(HUnaryMathOperation* instr);
 
  private:
   enum Status {