Implements Float32x4 and Uint32x4 instructions for ARM.

runtime/vm/assembler_arm.h

Index: runtime/vm/assembler_arm.h
===================================================================
--- runtime/vm/assembler_arm.h	(revision 25352)
+++ runtime/vm/assembler_arm.h	(working copy)
@@ -664,6 +664,12 @@
   void Ror(Register rd, Register rm, Register rs, Condition cond = AL);
   void Rrx(Register rd, Register rm, Condition cond = AL);
 
+  void Vreciprocalqs(QRegister qd, QRegister qm);
+  void VreciprocalSqrtqs(QRegister qd, QRegister qm);
+  // If qm must be preserved, then provide a (non-QTMP) temporary.
+  void Vsqrtqs(QRegister qd, QRegister qm, QRegister temp = kNoQRegister);
+  void Vdivqs(QRegister qd, QRegister qn, QRegister qm);
+
   void SmiTag(Register reg, Condition cond = AL) {
     Lsl(reg, reg, kSmiTagSize, cond);
   }