X87: enable the crankshaft compiler for X87 port.

src/x87/assembler-x87.h

Index: src/x87/assembler-x87.h
diff --git a/src/x87/assembler-x87.h b/src/x87/assembler-x87.h
index a2bedcc3cc501d00d8e0a3e74dd3c6b132fc98ba..d37c9d77dcb59cda879f4bd696675b293881c9c2 100644
--- a/src/x87/assembler-x87.h
+++ b/src/x87/assembler-x87.h
@@ -142,7 +142,7 @@ inline Register Register::FromAllocationIndex(int index)  {
 
 
 struct X87Register {
-  static const int kMaxNumAllocatableRegisters = 8;
+  static const int kMaxNumAllocatableRegisters = 6;
   static const int kMaxNumRegisters = 8;
   static int NumAllocatableRegisters() {
     return kMaxNumAllocatableRegisters;
@@ -852,6 +852,7 @@ class Assembler : public AssemblerBase {
 
   void fabs();
   void fchs();
+  void fsqrt();
   void fcos();
   void fsin();
   void fptan();
@@ -862,6 +863,7 @@ class Assembler : public AssemblerBase {
 
   void fadd(int i);
   void fadd_i(int i);
+  void fadd_d(const Operand& adr);
   void fsub(int i);
   void fsub_i(int i);
   void fmul(int i);
@@ -884,14 +886,19 @@ class Assembler : public AssemblerBase {
   void ffree(int i = 0);
 
   void ftst();
+  void fxam();
   void fucomp(int i);
   void fucompp();
   void fucomi(int i);
   void fucomip();
   void fcompp();
   void fnstsw_ax();
+  void fldcw(const Operand& adr);
+  void fnstcw(const Operand& adr);
   void fwait();
   void fnclex();
+  void fnsave(const Operand& adr);
+  void frstor(const Operand& adr);
 
   void frndint();