Implement more intrinisification for x64 (not as inlined code but as header of the target).

runtime/vm/assembler_x64.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_ASSEMBLER_X64_H_
 #define VM_ASSEMBLER_X64_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_x64.h directly; use assembler.h instead.
 #endif
@@ skipping 426 matching lines @@
   void decq(const Address& address);
 
   void negl(Register reg);
   void negq(Register reg);
   void notq(Register reg);
 
   void enter(const Immediate& imm);
   void leave();
   void ret();
 
+  void movmskpd(Register dst, XmmRegister src);
+
   void sqrtsd(XmmRegister dst, XmmRegister src);
 
   void xorpd(XmmRegister dst, const Address& src);
+  void xorpd(XmmRegister dst, XmmRegister src);
+
+  void fldl(const Address& src);
+  void fstpl(const Address& dst);
+
+  void fildl(const Address& src);
+
+  void fincstp();
+  void ffree(intptr_t value);
+
+  void fsin();
+  void fcos();
 
   // 'size' indicates size in bytes and must be in the range 1..8.
   void nop(int size = 1);
   void int3();
   void hlt();
 
   void j(Condition condition, Label* label, bool near = kFarJump);
   void j(Condition condition, const ExternalLabel* label);
 
   void jmp(Register reg);
@@ skipping 197 matching lines @@
 }
 
 
 inline void Assembler::EmitOperandSizeOverride() {
   EmitUint8(0x66);
 }
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_X64_H_