X64 Win64: Reimplement fmod so that it works.

src/arm/codegen-arm.cc

Index: src/arm/codegen-arm.cc
diff --git a/src/arm/codegen-arm.cc b/src/arm/codegen-arm.cc
index 147c5e354c55fe4206f4b25dafa6e7f65f1ed669..79ff48b0da693d5334a5a26227dd29cbcb2627e8 100644
--- a/src/arm/codegen-arm.cc
+++ b/src/arm/codegen-arm.cc
@@ -3405,6 +3405,17 @@ void CodeGenerator::GenerateFastMathOp(MathOp op, ZoneList<Expression*>* args) {
 }
 
 
+void CodeGenerator::GenerateNumberMod(ZoneList<Expression*>* args) {
+  // Simply call the runtime function. Arguments must be numbers.
+  ASSERT(args->length() == 2);
+  VirtualFrame::SpilledScope spilled_scope;
+  LoadAndSpill(args->at(0));
+  LoadAndSpill(args->at(1));
+  Result answer = frame_->CallRuntime(Runtime::kNumberMod, 2);
+  frame_->Push(&answer);
+}
+
+
 void CodeGenerator::GenerateObjectEquals(ZoneList<Expression*>* args) {
   VirtualFrame::SpilledScope spilled_scope;
   ASSERT(args->length() == 2);