Intrinisifed more core library methods: isNaN, isNegative, cos, sin.

runtime/vm/assembler_ia32.h

Index: runtime/vm/assembler_ia32.h
===================================================================
--- runtime/vm/assembler_ia32.h	(revision 3859)
+++ runtime/vm/assembler_ia32.h	(working copy)
@@ -375,6 +375,8 @@
   void comiss(XmmRegister a, XmmRegister b);
   void comisd(XmmRegister a, XmmRegister b);
 
+  void movmskpd(Register dst, XmmRegister src);
+
   void sqrtsd(XmmRegister dst, XmmRegister src);
   void sqrtss(XmmRegister dst, XmmRegister src);
 
@@ -397,6 +399,7 @@
   void fistpl(const Address& dst);
   void fistps(const Address& dst);
   void fildl(const Address& src);
+  void filds(const Address& src);
 
   void fincstp();
   void ffree(const Immediate& index);