Faster implementation of Math.exp()

src/arm/lithium-arm.h

Index: src/arm/lithium-arm.h
diff --git a/src/arm/lithium-arm.h b/src/arm/lithium-arm.h
index a5cf85fda5497a064f2c449b4359f27cc07fbb72..b45a3e0246fd49dd543ce7fdf0025fe472131598 100644
--- a/src/arm/lithium-arm.h
+++ b/src/arm/lithium-arm.h
@@ -131,6 +131,7 @@ class LCodeGen;
   V(LoadNamedFieldPolymorphic)                  \
   V(LoadNamedGeneric)                           \
   V(MapEnumLength)                              \
+  V(MathExp)                                    \
   V(MathFloorOfDiv)                             \
   V(MathMinMax)                                 \
   V(ModI)                                       \
@@ -681,6 +682,30 @@ class LUnaryMathOperation: public LTemplateInstruction<1, 1, 1> {
 };
 
 
+class LMathExp: public LTemplateInstruction<1, 1, 3> {
+ public:
+  LMathExp(LOperand* value,
+           LOperand* double_temp,
+           LOperand* temp1,
+           LOperand* temp2) {
+    inputs_[0] = value;
+    temps_[0] = temp1;
+    temps_[1] = temp2;
+    temps_[2] = double_temp;
+    ExternalReference::InitializeMathExpData();
+  }
+
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp1() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+  LOperand* double_temp() { return temps_[2]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(MathExp, "math-exp")
+
+  virtual void PrintDataTo(StringStream* stream);
+};
+
+
 class LCmpObjectEqAndBranch: public LControlInstruction<2, 0> {
  public:
   LCmpObjectEqAndBranch(LOperand* left, LOperand* right) {