X64: Remove more fpu code. Unroll more local initialization loops.

src/x64/assembler-x64.h

Index: src/x64/assembler-x64.h
diff --git a/src/x64/assembler-x64.h b/src/x64/assembler-x64.h
index 407863f697ad183caff8a21a1e685ca6de9a1dd6..213db2cc8ffa869a4a728d9e9d97d61390ea270f 100644
--- a/src/x64/assembler-x64.h
+++ b/src/x64/assembler-x64.h
@@ -1128,6 +1128,9 @@ class Assembler : public Malloced {
   void cvtss2sd(XMMRegister dst, const Operand& src);
   void cvtsd2ss(XMMRegister dst, XMMRegister src);
 
+  void cvtsd2si(Register dst, XMMRegister src);
+  void cvtsd2siq(Register dst, XMMRegister src);
+
   void addsd(XMMRegister dst, XMMRegister src);
   void subsd(XMMRegister dst, XMMRegister src);
   void mulsd(XMMRegister dst, XMMRegister src);