Make ldrd and strd instructions take two register arguments

src/arm/assembler-arm.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 755 matching lines @@
 
   // Load/Store instructions
   void ldr(Register dst, const MemOperand& src, Condition cond = al);
   void str(Register src, const MemOperand& dst, Condition cond = al);
   void ldrb(Register dst, const MemOperand& src, Condition cond = al);
   void strb(Register src, const MemOperand& dst, Condition cond = al);
   void ldrh(Register dst, const MemOperand& src, Condition cond = al);
   void strh(Register src, const MemOperand& dst, Condition cond = al);
   void ldrsb(Register dst, const MemOperand& src, Condition cond = al);
   void ldrsh(Register dst, const MemOperand& src, Condition cond = al);
-  void ldrd(Register dst, const MemOperand& src, Condition cond = al);
-  void strd(Register src, const MemOperand& dst, Condition cond = al);
+  void ldrd(Register dst1,
+            Register dst2,
+            const MemOperand& src, Condition cond = al);
+  void strd(Register src1,
+            Register src2,
+            const MemOperand& dst, Condition cond = al);
 
   // Load/Store multiple instructions
   void ldm(BlockAddrMode am, Register base, RegList dst, Condition cond = al);
   void stm(BlockAddrMode am, Register base, RegList src, Condition cond = al);
 
   // Exception-generating instructions and debugging support
   void stop(const char* msg);
 
   void bkpt(uint32_t imm16);  // v5 and above
   void swi(uint32_t imm24, Condition cond = al);
@@ skipping 344 matching lines @@
 
   friend class RegExpMacroAssemblerARM;
   friend class RelocInfo;
   friend class CodePatcher;
   friend class BlockConstPoolScope;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_ASSEMBLER_ARM_H_