Fixed bug in large switch tables on arm.

src/constants-arm.h

 // Copyright 2008 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 111 matching lines @@
 // bool InstructionSetsConditionCodes(byte* ptr) {
 //   Instr* instr = Instr::At(ptr);
 //   int type = instr->TypeField();
 //   return ((type == 0) || (type == 1)) && instr->HasS();
 // }
 //
 class Instr {
  public:
   enum {
     kInstrSize = 4,
+    kInstrSizeLog2 = 2,
     kPCReadOffset = 8
   };
 
   // Get the raw instruction bits.
   inline instr_t InstructionBits() const {
     return *reinterpret_cast<const instr_t*>(this);
   }
 
   // Set the raw instruction bits to value.
   inline void SetInstructionBits(instr_t value) {
@@ skipping 83 matching lines @@
 
  private:
   // We need to prevent the creation of instances of class Instr.
   DISALLOW_IMPLICIT_CONSTRUCTORS(Instr);
 };
 
 
 } }  // namespace assembler::arm
 
 #endif  // V8_CONSTANTS_ARM_H_