Use more fpu multi-load/store instructions on ARM.

runtime/vm/assembler_arm.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_ASSEMBLER_ARM_H_
 #define VM_ASSEMBLER_ARM_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_arm.h directly; use assembler.h instead.
 #endif
@@ skipping 638 matching lines @@
                       Condition cond = AL);
   void LoadDFromOffset(DRegister reg,
                        Register base,
                        int32_t offset,
                        Condition cond = AL);
   void StoreDToOffset(DRegister reg,
                       Register base,
                       int32_t offset,
                       Condition cond = AL);
 
+  void LoadMultipleDFromOffset(DRegister first,
+                               intptr_t count,
+                               Register base,
+                               int32_t offset);
+  void StoreMultipleDToOffset(DRegister first,
+                              intptr_t count,
+                              Register base,
+                              int32_t offset);
+
   void Push(Register rd, Condition cond = AL);
   void Pop(Register rd, Condition cond = AL);
 
   void PushList(RegList regs, Condition cond = AL);
   void PopList(RegList regs, Condition cond = AL);
 
   void MoveRegister(Register rd, Register rm, Condition cond = AL);
 
   // Convenience shift instructions. Use mov instruction with shifter operand
   // for variants setting the status flags.
@@ skipping 220 matching lines @@
                                   Register value,
                                   Label* no_update);
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_ARM_H_