RecordWriteStubs on ARM need to save FP registers

src/arm/macro-assembler-arm.h

 // Copyright 2012 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 979 matching lines @@
                    DwVfpRegister double_input,
                    DwVfpRegister double_scratch,
                    Register scratch,
                    Register input_high,
                    Register input_low);
 
   // Check whether d16-d31 are available on the CPU. The result is given by the
   // Z condition flag: Z==0 if d16-d31 available, Z==1 otherwise.
   void CheckFor32DRegs(Register scratch);
 
+  // Does a runtime check for 16/32 FP registers. Either way, pushes 32 double
+  // values to location, saving [d0..(d15|d31)].
+  void SaveFPRegs(Register location, Register scratch);
+
+  // Does a runtime check for 16/32 FP registers. Either way, pops 32 double
+  // values to location, restoring [d0..(d15|d31)].
+  void RestoreFPRegs(Register location, Register scratch);
 
   // ---------------------------------------------------------------------------
   // Runtime calls
 
   // Call a code stub.
   void CallStub(CodeStub* stub,
                 TypeFeedbackId ast_id = TypeFeedbackId::None(),
                 Condition cond = al);
 
   // Call a code stub.
@@ skipping 431 matching lines @@
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_MACRO_ASSEMBLER_ARM_H_