Port Math.pow inlining to ARM.

src/arm/full-codegen-arm.cc

Index: src/arm/full-codegen-arm.cc
diff --git a/src/arm/full-codegen-arm.cc b/src/arm/full-codegen-arm.cc
index 17289e8f0ac54c9b166f04b4abefbf4eae3f22ae..7e9a889116a24b1b3c6bbfbc759772004f7dbd47 100644
--- a/src/arm/full-codegen-arm.cc
+++ b/src/arm/full-codegen-arm.cc
@@ -2938,8 +2938,12 @@ void FullCodeGenerator::EmitMathPow(CallRuntime* expr) {
   ASSERT(args->length() == 2);
   VisitForStackValue(args->at(0));
   VisitForStackValue(args->at(1));
-  MathPowStub stub(MathPowStub::ON_STACK);
-  __ CallStub(&stub);
+  if (CpuFeatures::IsSupported(VFP3)) {
+    MathPowStub stub(MathPowStub::ON_STACK);
+    __ CallStub(&stub);
+  } else {
+    __ CallRuntime(Runtime::kMath_pow, 2);
+  }
   context()->Plug(r0);
 }