Faster implementation of Math.exp()

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
diff --git a/src/x64/lithium-x64.h b/src/x64/lithium-x64.h
index 4977cac405ad492d6b90d01d4d5b9cf6035738ad..b5d435b5214ad84672d081d279286782dc824c62 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -131,6 +131,7 @@ class LCodeGen;
   V(LoadNamedField)                             \
   V(LoadNamedFieldPolymorphic)                  \
   V(LoadNamedGeneric)                           \
+  V(MathExp)                                    \
   V(MathFloorOfDiv)                             \
   V(MathMinMax)                                 \
   V(ModI)                                       \
@@ -643,6 +644,25 @@ class LUnaryMathOperation: public LTemplateInstruction<1, 1, 0> {
 };
 
 
+class LMathExp: public LTemplateInstruction<1, 1, 2> {
+ public:
+  LMathExp(LOperand* value, LOperand* temp1, LOperand* temp2) {
+    inputs_[0] = value;
+    temps_[0] = temp1;
+    temps_[1] = temp2;
+    ExternalReference::InitializeMathExpData();
+  }
+
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp1() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(MathExp, "math-exp")
+
+  virtual void PrintDataTo(StringStream* stream);
+};
+
+
 class LCmpObjectEqAndBranch: public LControlInstruction<2, 0> {
  public:
   LCmpObjectEqAndBranch(LOperand* left, LOperand* right) {