ARM: Implement DoPower in the lithium code generator.

src/assembler.cc

Index: src/assembler.cc
diff --git a/src/assembler.cc b/src/assembler.cc
index 893ce5615920bdcffc8b8b7fc9b5f014da9f20c1..a323ecaa44c8a801b07430399ec7d7fbc1651203 100644
--- a/src/assembler.cc
+++ b/src/assembler.cc
@@ -852,12 +852,14 @@ double power_double_double(double x, double y) {
 
 
 ExternalReference ExternalReference::power_double_double_function() {
-  return ExternalReference(Redirect(FUNCTION_ADDR(power_double_double)));
+  return ExternalReference(Redirect(FUNCTION_ADDR(power_double_double),
+                                    FP_RETURN_CALL));
 }
 
 
 ExternalReference ExternalReference::power_double_int_function() {
-  return ExternalReference(Redirect(FUNCTION_ADDR(power_double_int)));
+  return ExternalReference(Redirect(FUNCTION_ADDR(power_double_int),
+                                    FP_RETURN_CALL));
 }