Implements DoubleToI on ARM. Refactor some VFP code at the same time and...

src/arm/lithium-codegen-arm.h

Index: src/arm/lithium-codegen-arm.h
===================================================================
--- src/arm/lithium-codegen-arm.h	(revision 6591)
+++ src/arm/lithium-codegen-arm.h	(working copy)
@@ -219,6 +219,11 @@
   // Specific math operations - used from DoUnaryMathOperation.
   void EmitIntegerMathAbs(LUnaryMathOperation* instr);
   void DoMathAbs(LUnaryMathOperation* instr);
+  void EmitVFPTruncate(VFPRoundingMode rounding_mode,
+                       SwVfpRegister result,
+                       DwVfpRegister double_input,
+                       Register scratch1,
+                       Register scratch2);
   void DoMathFloor(LUnaryMathOperation* instr);
   void DoMathSqrt(LUnaryMathOperation* instr);