Adds reciprocal squre root SIMD instructions for ARM.

runtime/vm/constants_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_CONSTANTS_ARM_H_
 #define VM_CONSTANTS_ARM_H_
 
 #include "platform/assert.h"
 
 namespace dart {
 
 // We support both VFPv3-D16 and VFPv3-D32 profiles, but currently only one at
 // a time.
-#define VFPv3_D16
+// TODO(zra): Detect number of registers at runtime by querying /proc/cpuinfo.
+#define VFPv3_D32
 #if defined(VFPv3_D16) == defined(VFPv3_D32)
 #error "Exactly one of VFPv3_D16 or VFPv3_D32 can be defined at a time."
 #endif
 
 
 enum Register {
   kFirstFreeCpuRegister = 0,
   R0  =  0,
   R1  =  1,
   R2  =  2,
@@ skipping 624 matching lines @@
   static Instr* At(uword pc) { return reinterpret_cast<Instr*>(pc); }
 
  private:
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(Instr);
 };
 
 }  // namespace dart
 
 #endif  // VM_CONSTANTS_ARM_H_