Implements the two argument shuffle SIMD instruction for 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 520 matching lines @@
   void vmstat(Condition cond = AL);  // VMRS APSR_nzcv, FPSCR
 
   // Duplicates the operand of size sz at index idx from dm to all elements of
   // qd. This is a special case of vtbl.
   void vdup(OperandSize sz, QRegister qd, DRegister dm, int idx);
 
   // Each byte of dm is an index into the table of bytes formed by concatenating
   // a list of 'length' registers starting with dn. The result is placed in dd.
   void vtbl(DRegister dd, DRegister dn, int length, DRegister dm);
 
+  // The words of qd and qm are interleaved with the low words of the result
+  // in qd and the high words in qm.
+  void vzipqw(QRegister qd, QRegister qm);
+
   // Branch instructions.
   void b(Label* label, Condition cond = AL);
   void bl(Label* label, Condition cond = AL);
   void bx(Register rm, Condition cond = AL);
   void blx(Register rm, Condition cond = AL);
 
   // Macros.
   // Branch to an entry address. Call sequence is never patched.
   void Branch(const ExternalLabel* label, Condition cond = AL);
 
@@ skipping 306 matching lines @@
                                   Register value,
                                   Label* no_update);
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_ARM_H_