ARM: Add support for DoMathAbs with double inputs....

src/arm/macro-assembler-arm.h

 // Copyright 2010 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
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     }
   }
 
   // Push and pop the registers that can hold pointers, as defined by the
   // RegList constant kSafepointSavedRegisters.
   void PushSafepointRegisters();
   void PopSafepointRegisters();
   void PushSafepointRegistersAndDoubles();
   void PopSafepointRegistersAndDoubles();
   void StoreToSafepointRegisterSlot(Register reg);
+  void StoreToSafepointRegistersAndDoublesSlot(Register reg);
+  void LoadFromSafepointRegisterSlot(Register reg);
   static int SafepointRegisterStackIndex(int reg_code);
   static MemOperand SafepointRegisterSlot(Register reg);
+  static MemOperand SafepointRegistersAndDoublesSlot(Register reg);
 
   // Load two consecutive registers with two consecutive memory locations.
   void Ldrd(Register dst1,
             Register dst2,
             const MemOperand& src,
             Condition cond = al);
 
   // Store two consecutive registers to two consecutive memory locations.
   void Strd(Register src1,
             Register src2,
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 #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_