MIPS: Improve registers saving for safepoints in deferred code.

src/mips/code-stubs-mips.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 139 matching lines @@
  public:
   SubStringStub() {}
 
  private:
   Major MajorKey() { return SubString; }
   int MinorKey() { return 0; }
 
   void Generate(MacroAssembler* masm);
 };
 
+class StoreRegistersStateStub: public PlatformCodeStub {
+ public:
+  explicit StoreRegistersStateStub(SaveFPRegsMode with_fp)
+      : save_doubles_(with_fp) {}
+
+  static void GenerateAheadOfTime(Isolate* isolate);
+ private:
+  Major MajorKey() { return StoreRegistersState; }
+  int MinorKey() { return (save_doubles_ == kSaveFPRegs) ? 1 : 0; }
+  SaveFPRegsMode save_doubles_;
+
+  void Generate(MacroAssembler* masm);
+};
+
+class RestoreRegistersStateStub: public PlatformCodeStub {
+ public:
+  explicit RestoreRegistersStateStub(SaveFPRegsMode with_fp)
+      : save_doubles_(with_fp) {}
+
+  static void GenerateAheadOfTime(Isolate* isolate);
+ private:
+  Major MajorKey() { return RestoreRegistersState; }
+  int MinorKey() { return (save_doubles_ == kSaveFPRegs) ? 1 : 0; }
+  SaveFPRegsMode save_doubles_;
+
+  void Generate(MacroAssembler* masm);
+};
 
 class StringCompareStub: public PlatformCodeStub {
  public:
   StringCompareStub() { }
 
   // Compare two flat ASCII strings and returns result in v0.
   static void GenerateCompareFlatAsciiStrings(MacroAssembler* masm,
                                               Register left,
                                               Register right,
                                               Register scratch1,
@@ skipping 322 matching lines @@
 
   class LookupModeBits: public BitField<LookupMode, 0, 1> {};
 
   LookupMode mode_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_MIPS_CODE_STUBS_ARM_H_