ARM: Default to use unaligned accesses in the simulator...

src/arm/constants-arm.h

 // Copyright 2010 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 48 matching lines @@
 # define CAN_USE_ARMV6_INSTRUCTIONS 1
 #endif
 
 #if defined(__ARM_ARCH_5T__)            || \
     defined(__ARM_ARCH_5TE__)           || \
     defined(CAN_USE_ARMV6_INSTRUCTIONS)
 # define CAN_USE_ARMV5_INSTRUCTIONS 1
 # define CAN_USE_THUMB_INSTRUCTIONS 1
 #endif
 
-// Simulator should support ARM5 instructions.
+// Simulator should support ARM5 instructions and unaligned access by default.
 #if !defined(__arm__)
 # define CAN_USE_ARMV5_INSTRUCTIONS 1
 # define CAN_USE_THUMB_INSTRUCTIONS 1
+
+# ifndef CAN_USE_UNALIGNED_ACCESSES
+#  define CAN_USE_UNALIGNED_ACCESSES 1
+# endif
+
 #endif
 
 #if CAN_USE_UNALIGNED_ACCESSES
 #define V8_TARGET_CAN_READ_UNALIGNED 1
 #endif
 
 // Using blx may yield better code, so use it when required or when available
 #if defined(USE_THUMB_INTERWORK) || defined(CAN_USE_ARMV5_INSTRUCTIONS)
 #define USE_BLX 1
 #endif
@@ skipping 285 matching lines @@
   static int Number(const char* name, bool* is_double);
 
  private:
   static const char* names_[kNumVFPRegisters];
 };
 
 
 } }  // namespace assembler::arm
 
 #endif  // V8_ARM_CONSTANTS_ARM_H_